* [PATCH 14/37] PCI: endpoint: Add EP core layer to enable EP controller and EP functions
From: Kishon Vijay Abraham I @ 2017-01-12 10:26 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
Introduce a new EP core layer in order to support endpoint functions
in linux kernel. This comprises of EPC library
(Endpoint Controller Library) and EPF library (Endpoint
Function Library). EPC library implements functions that is specific
to an endpoint controller and EPF library implements functions
that is specific to an endpoint function.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/Makefile | 2 +
drivers/pci/Kconfig | 1 +
drivers/pci/endpoint/Kconfig | 21 ++
drivers/pci/endpoint/Makefile | 6 +
drivers/pci/endpoint/pci-epc-core.c | 548 +++++++++++++++++++++++++++++++++++
drivers/pci/endpoint/pci-epc-mem.c | 143 +++++++++
drivers/pci/endpoint/pci-epf-core.c | 347 ++++++++++++++++++++++
include/linux/mod_devicetable.h | 10 +
include/linux/pci-epc.h | 141 +++++++++
include/linux/pci-epf.h | 160 ++++++++++
10 files changed, 1379 insertions(+)
create mode 100644 drivers/pci/endpoint/Kconfig
create mode 100644 drivers/pci/endpoint/Makefile
create mode 100644 drivers/pci/endpoint/pci-epc-core.c
create mode 100644 drivers/pci/endpoint/pci-epc-mem.c
create mode 100644 drivers/pci/endpoint/pci-epf-core.c
create mode 100644 include/linux/pci-epc.h
create mode 100644 include/linux/pci-epf.h
diff --git a/drivers/Makefile b/drivers/Makefile
index f521cb0..a300bb1 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -14,7 +14,9 @@ obj-$(CONFIG_GENERIC_PHY) += phy/
obj-$(CONFIG_PINCTRL) += pinctrl/
obj-$(CONFIG_GPIOLIB) += gpio/
obj-y += pwm/
+
obj-$(CONFIG_PCI) += pci/
+obj-$(CONFIG_PCI_ENDPOINT) += pci/endpoint/
# PCI dwc controller drivers
obj-y += pci/dwc/
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index df14142..9747c1e 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -134,3 +134,4 @@ config PCI_HYPERV
source "drivers/pci/hotplug/Kconfig"
source "drivers/pci/dwc/Kconfig"
source "drivers/pci/host/Kconfig"
+source "drivers/pci/endpoint/Kconfig"
diff --git a/drivers/pci/endpoint/Kconfig b/drivers/pci/endpoint/Kconfig
new file mode 100644
index 0000000..7eb1c79
--- /dev/null
+++ b/drivers/pci/endpoint/Kconfig
@@ -0,0 +1,21 @@
+#
+# PCI Endpoint Support
+#
+
+menu "PCI Endpoint"
+
+config PCI_ENDPOINT
+ bool "PCI Endpoint Support"
+ select CONFIGFS_FS
+ help
+ Enable this configuration option to support configurable PCI
+ endpoint. This should be enabled if the platform has a PCI
+ controller that can operate in endpoint mode.
+
+ Enabling this option will build the endpoint library, which
+ includes endpoint controller library and endpoint function
+ library.
+
+ If in doubt, say "N" to disable Endpoint support.
+
+endmenu
diff --git a/drivers/pci/endpoint/Makefile b/drivers/pci/endpoint/Makefile
new file mode 100644
index 0000000..eeef1b7
--- /dev/null
+++ b/drivers/pci/endpoint/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for PCI Endpoint Support
+#
+
+obj-$(CONFIG_PCI_ENDPOINT) := pci-epc-core.o pci-epf-core.o\
+ pci-epc-mem.o
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
new file mode 100644
index 0000000..2c33e8a
--- /dev/null
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -0,0 +1,548 @@
+/**
+ * PCI Endpoint *Controller* (EPC) library
+ *
+ * Copyright (C) 2017 Texas Instruments
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 of
+ * the License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+
+#include <linux/pci-epc.h>
+#include <linux/pci-epf.h>
+
+static struct class *pci_epc_class;
+
+static void devm_pci_epc_release(struct device *dev, void *res)
+{
+ struct pci_epc *epc = *(struct pci_epc **)res;
+
+ pci_epc_destroy(epc);
+}
+
+static int devm_pci_epc_match(struct device *dev, void *res, void *match_data)
+{
+ struct pci_epc **epc = res;
+
+ return *epc == match_data;
+}
+
+/**
+ * pci_epc_get() - get the pci endpoint controller
+ * @epc_name: device name of the endpoint controller
+ *
+ * Invoke to get struct pci_epc * corresponding to the device name of the
+ * endpoint controller
+ */
+struct pci_epc *pci_epc_get(char *epc_name)
+{
+ int ret = -EINVAL;
+ struct pci_epc *epc;
+ struct device *dev;
+ struct class_dev_iter iter;
+
+ class_dev_iter_init(&iter, pci_epc_class, NULL, NULL);
+ while ((dev = class_dev_iter_next(&iter))) {
+ if (strcmp(epc_name, dev_name(dev)))
+ continue;
+
+ epc = to_pci_epc(dev);
+ if (!try_module_get(epc->ops->owner)) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ get_device(&epc->dev);
+ return epc;
+ }
+
+err:
+ class_dev_iter_exit(&iter);
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(pci_epc_get);
+
+/**
+ * pci_epc_put() - release the pci endpoint controller
+ * @epc: epc returned by pci_epc_get()
+ *
+ * release the refcount the caller obtained by invoking pci_epc_get()
+ */
+void pci_epc_put(struct pci_epc *epc)
+{
+ if (!epc || IS_ERR(epc))
+ return;
+
+ module_put(epc->ops->owner);
+ put_device(&epc->dev);
+}
+EXPORT_SYMBOL_GPL(pci_epc_put);
+
+/**
+ * pci_epc_stop() - stop the PCI link
+ * @epc: the link of the EPC device that has to be stopped
+ *
+ * Invoke to stop the PCI link
+ */
+void pci_epc_stop(struct pci_epc *epc)
+{
+ unsigned long flags;
+
+ if (IS_ERR(epc) || !epc->ops->stop)
+ return;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ epc->ops->stop(epc);
+ spin_unlock_irqrestore(&epc->lock, flags);
+}
+EXPORT_SYMBOL_GPL(pci_epc_stop);
+
+/**
+ * pci_epc_start() - start the PCI link
+ * @epc: the link of *this* EPC device has to be started
+ *
+ * Invoke to start the PCI link
+ */
+int pci_epc_start(struct pci_epc *epc)
+{
+ int ret;
+ unsigned long flags;
+
+ if (IS_ERR(epc))
+ return -EINVAL;
+
+ if (!epc->ops->start)
+ return 0;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ ret = epc->ops->start(epc);
+ spin_unlock_irqrestore(&epc->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pci_epc_start);
+
+/**
+ * pci_epc_raise_irq() - interrupt the host system
+ * @epc: the EPC device which has to interrupt the host
+ * @type: specify the type of interrupt; legacy or MSI
+ * @interrupt_num: the MSI interrupt number
+ *
+ * Invoke to raise an MSI or legacy interrupt
+ */
+int pci_epc_raise_irq(struct pci_epc *epc, enum pci_epc_irq_type type,
+ u8 interrupt_num)
+{
+ int ret;
+ unsigned long flags;
+
+ if (IS_ERR(epc))
+ return -EINVAL;
+
+ if (!epc->ops->raise_irq)
+ return 0;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ ret = epc->ops->raise_irq(epc, type, interrupt_num);
+ spin_unlock_irqrestore(&epc->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pci_epc_raise_irq);
+
+/**
+ * pci_epc_get_msi() - get the number of MSI interrupt numbers allocated
+ * @epc: the EPC device to which MSI interrupts was requested
+ *
+ * Invoke to get the number of MSI interrupts allocated by the RC
+ */
+int pci_epc_get_msi(struct pci_epc *epc)
+{
+ int interrupt;
+ unsigned long flags;
+
+ if (IS_ERR(epc))
+ return 0;
+
+ if (!epc->ops->get_msi)
+ return 0;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ interrupt = epc->ops->get_msi(epc);
+ spin_unlock_irqrestore(&epc->lock, flags);
+
+ if (interrupt < 0)
+ return 0;
+
+ interrupt = 1 << interrupt;
+
+ return interrupt;
+}
+EXPORT_SYMBOL_GPL(pci_epc_get_msi);
+
+/**
+ * pci_epc_set_msi() - set the number of MSI interrupt numbers required
+ * @epc: the EPC device on which MSI has to be configured
+ * @interrupts: number of MSI interrupts required by the EPF
+ *
+ * Invoke to set the required number of MSI interrupts.
+ */
+int pci_epc_set_msi(struct pci_epc *epc, u8 interrupts)
+{
+ int ret;
+ u8 encode_int;
+ unsigned long flags;
+
+ if (IS_ERR(epc))
+ return -EINVAL;
+
+ if (!epc->ops->set_msi)
+ return 0;
+
+ encode_int = order_base_2(interrupts);
+
+ spin_lock_irqsave(&epc->lock, flags);
+ ret = epc->ops->set_msi(epc, encode_int);
+ spin_unlock_irqrestore(&epc->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pci_epc_set_msi);
+
+/**
+ * pci_epc_unmap_addr() - unmap cpu address from pci address
+ * @epc: the EPC device on which address is allocated
+ * @phys_addr: physical address of the local system
+ *
+ * Invoke to unmap the cpu address from pci address.
+ */
+void pci_epc_unmap_addr(struct pci_epc *epc, phys_addr_t phys_addr)
+{
+ unsigned long flags;
+
+ if (IS_ERR(epc))
+ return;
+
+ if (!epc->ops->unmap_addr)
+ return;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ epc->ops->unmap_addr(epc, phys_addr);
+ spin_unlock_irqrestore(&epc->lock, flags);
+}
+EXPORT_SYMBOL_GPL(pci_epc_unmap_addr);
+
+/**
+ * pci_epc_map_addr() - map cpu address to pci address
+ * @epc: the EPC device on which address is allocated
+ * @phys_addr: physical address of the local system
+ * @pci_addr: pci address to which the physical address should be mapped
+ * @size: the size of the allocation
+ *
+ * Invoke to map cpu address with pci address.
+ */
+int pci_epc_map_addr(struct pci_epc *epc, phys_addr_t phys_addr,
+ u64 pci_addr, size_t size)
+{
+ int ret;
+ unsigned long flags;
+
+ if (IS_ERR(epc))
+ return -EINVAL;
+
+ if (!epc->ops->map_addr)
+ return 0;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ ret = epc->ops->map_addr(epc, phys_addr, pci_addr, size);
+ spin_unlock_irqrestore(&epc->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pci_epc_map_addr);
+
+/**
+ * pci_epc_clear_bar() - reset the BAR
+ * @epc: the EPC device for which the BAR has to be cleared
+ * @bar: the bar number that has to be reset
+ *
+ * Invoke to reset the BAR of the endpoint device.
+ */
+void pci_epc_clear_bar(struct pci_epc *epc, int bar)
+{
+ unsigned long flags;
+
+ if (IS_ERR(epc))
+ return;
+
+ if (!epc->ops->clear_bar)
+ return;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ epc->ops->clear_bar(epc, bar);
+ spin_unlock_irqrestore(&epc->lock, flags);
+}
+EXPORT_SYMBOL_GPL(pci_epc_clear_bar);
+
+/**
+ * pci_epc_set_bar() - configure BAR in order for host to assign PCI addr space
+ * @epc: the EPC device on which BAR has to be configured
+ * @bar: the bar number that has to be configured
+ * @size: the size of the addr space
+ * @flags: specify memory allocation/io allocation/32bit address/64 bit address
+ *
+ * Invoke to configure the BAR of the endpoint device.
+ */
+int pci_epc_set_bar(struct pci_epc *epc, enum pci_barno bar,
+ dma_addr_t bar_phys, size_t size, int flags)
+{
+ int ret;
+ unsigned long irq_flags;
+
+ if (IS_ERR(epc))
+ return -EINVAL;
+
+ if (!epc->ops->set_bar)
+ return 0;
+
+ spin_lock_irqsave(&epc->lock, irq_flags);
+ ret = epc->ops->set_bar(epc, bar, bar_phys, size, flags);
+ spin_unlock_irqrestore(&epc->lock, irq_flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pci_epc_set_bar);
+
+/**
+ * pci_epc_write_header() - write standard configuration header
+ * @epc: the EPC device to which the configuration header should be written
+ * @header: standard configuration header fields
+ *
+ * Invoke to write the configuration header to the endpoint controller. Every
+ * endpoint controller will have a dedicated location to which the standard
+ * configuration header would be written. The callback function should write
+ * the header fields to this dedicated location.
+ */
+int pci_epc_write_header(struct pci_epc *epc, struct pci_epf_header *header)
+{
+ int ret;
+ unsigned long flags;
+
+ if (IS_ERR(epc))
+ return -EINVAL;
+
+ if (!epc->ops->write_header)
+ return 0;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ ret = epc->ops->write_header(epc, header);
+ spin_unlock_irqrestore(&epc->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pci_epc_write_header);
+
+/**
+ * pci_epc_add_epf() - bind pci endpoint function to an endpoint controller
+ * @epc: the EPC device to which the endpoint function should be added
+ * @epf: the endpoint function to be added
+ *
+ * A PCI endpoint device can have one or more functions. In the case of PCIe,
+ * the specification allows upto 8 PCIe endpoint functions. Invoke
+ * pci_epc_add_epf() to add a pci endpoint function to an endpoint controller.
+ */
+int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf)
+{
+ unsigned long flags;
+
+ if (IS_ERR(epc))
+ return -EINVAL;
+
+ if (epf->func_no > epc->max_functions - 1)
+ return -EINVAL;
+
+ dma_set_coherent_mask(&epf->dev, epc->dev.coherent_dma_mask);
+ epf->dev.dma_mask = epc->dev.dma_mask;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ list_add_tail(&epf->list, &epc->pci_epf);
+ spin_unlock_irqrestore(&epc->lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pci_epc_add_epf);
+
+/**
+ * pci_epc_remove_epf() - remove pci endpoint function from endpoint controller
+ * @epc: the EPC device from which the endpoint function should be removed
+ * @epf: the endpoint function to be removed
+ *
+ * Invoke to remove pci endpoint function from the endpoint controller.
+ */
+void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf)
+{
+ unsigned long flags;
+
+ if (!epc || IS_ERR(epc))
+ return;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ list_del(&epf->list);
+ spin_unlock_irqrestore(&epc->lock, flags);
+}
+EXPORT_SYMBOL_GPL(pci_epc_remove_epf);
+
+/**
+ * pci_epc_destroy() - destroy the EPC device
+ * @epc: the EPC device that has to be destroyed
+ *
+ * Invoke to destroy the PCI EPC device
+ */
+void pci_epc_destroy(struct pci_epc *epc)
+{
+ device_unregister(&epc->dev);
+ kfree(epc);
+}
+EXPORT_SYMBOL_GPL(pci_epc_destroy);
+
+/**
+ * devm_pci_epc_destroy() - destroy the EPC device
+ * @dev: device that wants to destroy the EPC
+ * @epc: the EPC device that has to be destroyed
+ *
+ * Invoke to destroy the devres associated with this
+ * pci_epc and destroy the EPC device.
+ */
+void devm_pci_epc_destroy(struct device *dev, struct pci_epc *epc)
+{
+ int r;
+
+ r = devres_destroy(dev, devm_pci_epc_release, devm_pci_epc_match,
+ epc);
+ dev_WARN_ONCE(dev, r, "couldn't find PCI EPC resource\n");
+}
+EXPORT_SYMBOL_GPL(devm_pci_epc_destroy);
+
+/**
+ * __pci_epc_create() - create a new endpoint controller (EPC) device
+ * @dev: device that is creating the new EPC
+ * @ops: function pointers for performing EPC operations
+ * @owner: the owner of the module that creates the EPC device
+ *
+ * Invoke to create a new EPC device and add it to pci_epc class.
+ */
+struct pci_epc *
+__pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
+ struct module *owner)
+{
+ int ret;
+ struct pci_epc *epc;
+
+ if (WARN_ON(!dev)) {
+ ret = -EINVAL;
+ goto err_ret;
+ }
+
+ epc = kzalloc(sizeof(*epc), GFP_KERNEL);
+ if (!epc) {
+ ret = -ENOMEM;
+ goto err_ret;
+ }
+
+ spin_lock_init(&epc->lock);
+ INIT_LIST_HEAD(&epc->pci_epf);
+
+ device_initialize(&epc->dev);
+ dma_set_coherent_mask(&epc->dev, dev->coherent_dma_mask);
+ epc->dev.class = pci_epc_class;
+ epc->dev.dma_mask = dev->dma_mask;
+ epc->ops = ops;
+
+ ret = dev_set_name(&epc->dev, "%s", dev_name(dev));
+ if (ret)
+ goto put_dev;
+
+ ret = device_add(&epc->dev);
+ if (ret)
+ goto put_dev;
+
+ return epc;
+
+put_dev:
+ put_device(&epc->dev);
+ kfree(epc);
+
+err_ret:
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(__pci_epc_create);
+
+/**
+ * __devm_pci_epc_create() - create a new endpoint controller (EPC) device
+ * @dev: device that is creating the new EPC
+ * @ops: function pointers for performing EPC operations
+ * @owner: the owner of the module that creates the EPC device
+ *
+ * Invoke to create a new EPC device and add it to pci_epc class.
+ * While at that, it also associates the device with the pci_epc using devres.
+ * On driver detach, release function is invoked on the devres data,
+ * then, devres data is freed.
+ */
+struct pci_epc *
+__devm_pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
+ struct module *owner)
+{
+ struct pci_epc **ptr, *epc;
+
+ ptr = devres_alloc(devm_pci_epc_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ epc = __pci_epc_create(dev, ops, owner);
+ if (!IS_ERR(epc)) {
+ *ptr = epc;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return epc;
+}
+EXPORT_SYMBOL_GPL(__devm_pci_epc_create);
+
+static int __init pci_epc_init(void)
+{
+ pci_epc_class = class_create(THIS_MODULE, "pci_epc");
+ if (IS_ERR(pci_epc_class)) {
+ pr_err("failed to create pci epc class --> %ld\n",
+ PTR_ERR(pci_epc_class));
+ return PTR_ERR(pci_epc_class);
+ }
+
+ return 0;
+}
+module_init(pci_epc_init);
+
+static void __exit pci_epc_exit(void)
+{
+ class_destroy(pci_epc_class);
+}
+module_exit(pci_epc_exit);
+
+MODULE_DESCRIPTION("PCI EPC Library");
+MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/endpoint/pci-epc-mem.c b/drivers/pci/endpoint/pci-epc-mem.c
new file mode 100644
index 0000000..3a94cc1
--- /dev/null
+++ b/drivers/pci/endpoint/pci-epc-mem.c
@@ -0,0 +1,143 @@
+/**
+ * PCI Endpoint *Controller* Address Space Management
+ *
+ * Copyright (C) 2017 Texas Instruments
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 of
+ * the License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include <linux/pci-epc.h>
+
+/**
+ * pci_epc_mem_init() - initialize the pci_epc_mem structure
+ * @epc: the EPC device that invoked pci_epc_mem_init
+ * @phys_base: the physical address of the base
+ * @size: the size of the address space
+ *
+ * Invoke to initialize the pci_epc_mem structure used by the
+ * endpoint functions to allocate mapped PCI address.
+ */
+int pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_base, size_t size)
+{
+ int ret;
+ struct pci_epc_mem *mem;
+ unsigned long *bitmap;
+ int pages = size >> PAGE_SHIFT;
+ int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
+
+ mem = kzalloc(sizeof(*mem), GFP_KERNEL);
+ if (!mem) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ bitmap = kzalloc(bitmap_size, GFP_KERNEL);
+ if (!bitmap) {
+ ret = -ENOMEM;
+ goto err_mem;
+ }
+
+ mem->bitmap = bitmap;
+ mem->phys_base = phys_base;
+ mem->pages = pages;
+ mem->size = size;
+
+ epc->mem = mem;
+
+ return 0;
+
+err_mem:
+ kfree(mem);
+
+err:
+return ret;
+}
+EXPORT_SYMBOL_GPL(pci_epc_mem_init);
+
+/**
+ * pci_epc_mem_exit() - cleanup the pci_epc_mem structure
+ * @epc: the EPC device that invoked pci_epc_mem_exit
+ *
+ * Invoke to cleanup the pci_epc_mem structure allocated in
+ * pci_epc_mem_init().
+ */
+void pci_epc_mem_exit(struct pci_epc *epc)
+{
+ struct pci_epc_mem *mem = epc->mem;
+
+ epc->mem = NULL;
+ kfree(mem->bitmap);
+ kfree(mem);
+}
+EXPORT_SYMBOL_GPL(pci_epc_mem_exit);
+
+/**
+ * pci_epc_mem_alloc_addr() - allocate memory address from EPC addr space
+ * @epc: the EPC device on which memory has to be allocated
+ * @phys_addr: populate the allocated physical address here
+ * @size: the size of the address space that has to be allocated
+ *
+ * Invoke to allocate memory address from the EPC address space. This
+ * is usually done to map the remote RC address into the local system.
+ */
+void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
+ phys_addr_t *phys_addr, size_t size)
+{
+ int pageno;
+ void __iomem *virt_addr;
+ struct pci_epc_mem *mem = epc->mem;
+ int order = get_order(size);
+
+ pageno = bitmap_find_free_region(mem->bitmap, mem->pages, order);
+ if (pageno < 0)
+ return NULL;
+
+ *phys_addr = mem->phys_base + (pageno << PAGE_SHIFT);
+ virt_addr = ioremap(*phys_addr, size);
+ if (!virt_addr)
+ bitmap_release_region(mem->bitmap, pageno, order);
+
+ return virt_addr;
+}
+EXPORT_SYMBOL_GPL(pci_epc_mem_alloc_addr);
+
+/**
+ * pci_epc_mem_free_addr() - free the allocated memory address
+ * @epc: the EPC device on which memory was allocated
+ * @phys_addr: the allocated physical address
+ * @virt_addr: virtual address of the allocated mem space
+ * @size: the size of the allocated address space
+ *
+ * Invoke to free the memory allocated using pci_epc_mem_alloc_addr.
+ */
+void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr,
+ void __iomem *virt_addr, size_t size)
+{
+ int pageno;
+ int order = get_order(size);
+ struct pci_epc_mem *mem = epc->mem;
+
+ iounmap(virt_addr);
+ pageno = (phys_addr - mem->phys_base) >> PAGE_SHIFT;
+ bitmap_release_region(mem->bitmap, pageno, order);
+}
+EXPORT_SYMBOL_GPL(pci_epc_mem_free_addr);
+
+MODULE_DESCRIPTION("PCI EPC Address Space Management");
+MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
new file mode 100644
index 0000000..4c903fc
--- /dev/null
+++ b/drivers/pci/endpoint/pci-epf-core.c
@@ -0,0 +1,347 @@
+/**
+ * PCI Endpoint *Function* (EPF) library
+ *
+ * Copyright (C) 2017 Texas Instruments
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 of
+ * the License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+
+#include <linux/pci-epc.h>
+#include <linux/pci-epf.h>
+
+static struct bus_type pci_epf_bus_type;
+static struct device_type pci_epf_type;
+
+/**
+ * pci_epf_linkup() - Notify the function driver that EPC device has
+ * established a connection with the Root Complex.
+ * @epf: the EPF device bound to the EPC device which has established
+ * the connection with the host
+ *
+ * Invoke to notify the function driver that EPC device has established
+ * a connection with the Root Complex.
+ */
+void pci_epf_linkup(struct pci_epf *epf)
+{
+ if (!epf->driver)
+ dev_WARN(&epf->dev, "epf device not bound to driver\n");
+
+ epf->driver->ops->linkup(epf);
+}
+EXPORT_SYMBOL_GPL(pci_epf_linkup);
+
+/**
+ * pci_epf_unbind() - Notify the function driver that the binding between the
+ * EPF device and EPC device has been lost
+ * @epf: the EPF device which has lost the binding with the EPC device
+ *
+ * Invoke to notify the function driver that the binding between the EPF device
+ * and EPC device has been lost.
+ */
+void pci_epf_unbind(struct pci_epf *epf)
+{
+ if (!epf->driver)
+ dev_WARN(&epf->dev, "epf device not bound to driver\n");
+
+ epf->driver->ops->unbind(epf);
+ module_put(epf->driver->owner);
+}
+EXPORT_SYMBOL_GPL(pci_epf_unbind);
+
+/**
+ * pci_epf_bind() - Notify the function driver that the EPF device has been
+ * bound to a EPC device
+ * @epf: the EPF device which has been bound to the EPC device
+ *
+ * Invoke to notify the function driver that it has been bound to a EPC device
+ */
+int pci_epf_bind(struct pci_epf *epf)
+{
+ if (!epf->driver)
+ dev_WARN(&epf->dev, "epf device not bound to driver\n");
+
+ if (!try_module_get(epf->driver->owner))
+ return -EAGAIN;
+
+ return epf->driver->ops->bind(epf);
+}
+EXPORT_SYMBOL_GPL(pci_epf_bind);
+
+/**
+ * pci_epf_free_space() - free the allocated PCI EPF register space
+ * @addr: the virtual address of the PCI EPF register space
+ * @bar: the bar number corresponding to the register space
+ *
+ * Invoke to free the allocated PCI EPF register space.
+ */
+void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar)
+{
+ struct device *dev = &epf->dev;
+
+ if (!addr)
+ return;
+
+ dma_free_coherent(dev, epf->bar[bar].size, addr,
+ epf->bar[bar].phys_addr);
+
+ epf->bar[bar].phys_addr = 0;
+ epf->bar[bar].size = 0;
+}
+EXPORT_SYMBOL_GPL(pci_epf_free_space);
+
+/**
+ * pci_epf_alloc_space() - allocate memory for the PCI EPF register space
+ * @size: the size of the memory that has to be allocated
+ * @bar: the bar number corresponding to the allocated register space
+ *
+ * Invoke to allocate memory for the PCI EPF register space.
+ */
+void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar)
+{
+ void *space;
+ struct device *dev = &epf->dev;
+ dma_addr_t phys_addr;
+
+ if (size < 128)
+ size = 128;
+ size = roundup_pow_of_two(size);
+
+ space = dma_alloc_coherent(dev, size, &phys_addr, GFP_KERNEL);
+ if (!space) {
+ dev_err(dev, "failed to allocate mem space\n");
+ return NULL;
+ }
+
+ epf->bar[bar].phys_addr = phys_addr;
+ epf->bar[bar].size = size;
+
+ return space;
+}
+EXPORT_SYMBOL_GPL(pci_epf_alloc_space);
+
+/**
+ * pci_epf_unregister_driver() - unregister the PCI EPF driver
+ * @driver: the PCI EPF driver that has to be unregistered
+ *
+ * Invoke to unregister the PCI EPF driver.
+ */
+void pci_epf_unregister_driver(struct pci_epf_driver *driver)
+{
+ driver_unregister(&driver->driver);
+}
+EXPORT_SYMBOL_GPL(pci_epf_unregister_driver);
+
+/**
+ * __pci_epf_register_driver() - register a new PCI EPF driver
+ * @driver: structure representing PCI EPF driver
+ * @owner: the owner of the module that registers the PCI EPF driver
+ *
+ * Invoke to register a new PCI EPF driver.
+ */
+int __pci_epf_register_driver(struct pci_epf_driver *driver,
+ struct module *owner)
+{
+ int ret;
+
+ if (!driver->ops)
+ return -EINVAL;
+
+ if (!driver->ops->bind || !driver->ops->unbind || !driver->ops->linkup)
+ return -EINVAL;
+
+ driver->driver.bus = &pci_epf_bus_type;
+ driver->driver.owner = owner;
+
+ ret = driver_register(&driver->driver);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(__pci_epf_register_driver);
+
+/**
+ * pci_epf_destroy() - destroy the created PCI EPF device
+ * @epf: the PCI EPF device that has to be destroyed.
+ *
+ * Invoke to destroy the PCI EPF device created by invoking pci_epf_create().
+ */
+void pci_epf_destroy(struct pci_epf *epf)
+{
+ device_unregister(&epf->dev);
+}
+EXPORT_SYMBOL_GPL(pci_epf_destroy);
+
+/**
+ * pci_epf_create() - create a new PCI EPF device
+ * @name: the name of the PCI EPF device. This name will be used to bind the
+ * the EPF device to a EPF driver
+ *
+ * Invoke to create a new PCI EPF device by providing the name of the function
+ * device.
+ */
+struct pci_epf *pci_epf_create(const char *name)
+{
+ int ret;
+ struct pci_epf *epf;
+ struct device *dev;
+ char *func_name;
+ char *buf;
+
+ epf = kzalloc(sizeof(*epf), GFP_KERNEL);
+ if (!epf) {
+ ret = -ENOMEM;
+ goto err_ret;
+ }
+
+ buf = kstrdup(name, GFP_KERNEL);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto free_epf;
+ }
+
+ func_name = buf;
+ buf = strchrnul(buf, '.');
+ *buf = '\0';
+
+ epf->name = kstrdup(func_name, GFP_KERNEL);
+ if (!epf->name) {
+ ret = -ENOMEM;
+ goto free_epf;
+ }
+
+ dev = &epf->dev;
+ device_initialize(dev);
+ dev->bus = &pci_epf_bus_type;
+ dev->type = &pci_epf_type;
+
+ ret = dev_set_name(dev, "%s", name);
+ if (ret)
+ goto put_dev;
+
+ ret = device_add(dev);
+ if (ret)
+ goto put_dev;
+
+ kfree(func_name);
+ return epf;
+
+put_dev:
+ put_device(dev);
+ kfree(epf->name);
+ kfree(func_name);
+
+free_epf:
+ kfree(epf);
+
+err_ret:
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(pci_epf_create);
+
+static void pci_epf_dev_release(struct device *dev)
+{
+ struct pci_epf *epf = to_pci_epf(dev);
+
+ kfree(epf->name);
+ kfree(epf);
+}
+
+static struct device_type pci_epf_type = {
+ .release = pci_epf_dev_release,
+};
+
+static int
+pci_epf_match_id(const struct pci_epf_device_id *id, const struct pci_epf *epf)
+{
+ while (id->name[0]) {
+ if (strcmp(epf->name, id->name) == 0)
+ return true;
+ id++;
+ }
+
+ return false;
+}
+
+static int pci_epf_device_match(struct device *dev, struct device_driver *drv)
+{
+ struct pci_epf *epf = to_pci_epf(dev);
+ struct pci_epf_driver *driver = to_pci_epf_driver(drv);
+
+ if (driver->id_table)
+ return pci_epf_match_id(driver->id_table, epf);
+
+ return !strcmp(epf->name, drv->name);
+}
+
+static int pci_epf_device_probe(struct device *dev)
+{
+ struct pci_epf *epf = to_pci_epf(dev);
+ struct pci_epf_driver *driver = to_pci_epf_driver(dev->driver);
+
+ if (!driver->probe)
+ return -ENODEV;
+
+ epf->driver = driver;
+
+ return driver->probe(epf);
+}
+
+static int pci_epf_device_remove(struct device *dev)
+{
+ int ret;
+ struct pci_epf *epf = to_pci_epf(dev);
+ struct pci_epf_driver *driver = to_pci_epf_driver(dev->driver);
+
+ ret = driver->remove(epf);
+ epf->driver = NULL;
+
+ return ret;
+}
+
+static struct bus_type pci_epf_bus_type = {
+ .name = "pci-epf",
+ .match = pci_epf_device_match,
+ .probe = pci_epf_device_probe,
+ .remove = pci_epf_device_remove,
+};
+
+static int __init pci_epf_init(void)
+{
+ int ret;
+
+ ret = bus_register(&pci_epf_bus_type);
+ if (ret) {
+ pr_err("failed to register pci epf bus --> %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+module_init(pci_epf_init);
+
+static void __exit pci_epf_exit(void)
+{
+ bus_unregister(&pci_epf_bus_type);
+}
+module_exit(pci_epf_exit);
+
+MODULE_DESCRIPTION("PCI EPF Library");
+MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 8a57f0b..bf706c1 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -428,6 +428,16 @@ struct i2c_device_id {
kernel_ulong_t driver_data; /* Data private to the driver */
};
+/* pci_epf */
+
+#define PCI_EPF_NAME_SIZE 20
+#define PCI_EPF_MODULE_PREFIX "pci_epf:"
+
+struct pci_epf_device_id {
+ char name[PCI_EPF_NAME_SIZE];
+ kernel_ulong_t driver_data;
+};
+
/* spi */
#define SPI_NAME_SIZE 32
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
new file mode 100644
index 0000000..3091555
--- /dev/null
+++ b/include/linux/pci-epc.h
@@ -0,0 +1,141 @@
+/**
+ * pci-epc.h - PCI Endpoint *Controller* (EPC) header file
+ *
+ * Copyright (C) 2016 Texas Instruments
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 of
+ * the License as published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_PCI_EPC_H
+#define __LINUX_PCI_EPC_H
+
+#include <linux/pci-epf.h>
+
+struct pci_epc;
+
+enum pci_epc_irq_type {
+ PCI_EPC_IRQ_UNKNOWN,
+ PCI_EPC_IRQ_LEGACY,
+ PCI_EPC_IRQ_MSI,
+};
+
+/**
+ * struct pci_epc_ops - set of function pointers for performing EPC operations
+ * @write_header: ops to populate configuration space header
+ * @set_bar: ops to configure the BAR
+ * @clear_bar: ops to reset the BAR
+ * @map_addr: ops to map cpu address to pci address
+ * @unmap_addr: ops to unmap cpu address and pci address
+ * @set_msi: ops to set the requested number of MSI interrupts in the MSI
+ * capability register
+ * @get_msi: ops to get the number of MSI interrupts allocated by the RC from
+ * the MSI capability register
+ * @raise_irq: ops to raise a legacy or MSI interrupt
+ * @start: ops to start the PCI link
+ * @stop: ops to stop the PCI link
+ * @owner: the module owner containing the ops
+ */
+struct pci_epc_ops {
+ int (*write_header)(struct pci_epc *pci_epc,
+ struct pci_epf_header *hdr);
+ int (*set_bar)(struct pci_epc *epc, enum pci_barno bar,
+ dma_addr_t bar_phys, size_t size, int flags);
+ void (*clear_bar)(struct pci_epc *epc, enum pci_barno bar);
+ int (*map_addr)(struct pci_epc *epc, phys_addr_t addr,
+ u64 pci_addr, size_t size);
+ void (*unmap_addr)(struct pci_epc *epc, phys_addr_t addr);
+ int (*set_msi)(struct pci_epc *epc, u8 interrupts);
+ int (*get_msi)(struct pci_epc *epc);
+ int (*raise_irq)(struct pci_epc *pci_epc,
+ enum pci_epc_irq_type type, u8 interrupt_num);
+ int (*start)(struct pci_epc *epc);
+ void (*stop)(struct pci_epc *epc);
+ struct module *owner;
+};
+
+/**
+ * struct pci_epc_mem - address space of the endpoint controller
+ * @phys_base: physical base address of the pci address space
+ * @size: the size of the pci address space
+ * @bitmap: bitmap to manage the pci address space
+ * @pages: number of bits representing the address region
+ */
+struct pci_epc_mem {
+ phys_addr_t phys_base;
+ size_t size;
+ unsigned long *bitmap;
+ int pages;
+};
+
+/**
+ * struct pci_epc - represents the PCI EPC device
+ * @dev: PCI EPC device
+ * @pci_epf: list of endpoint functions present in this EPC device
+ * @ops: function pointers for performing endpoint operations
+ * @mem: address space of the endpoint controller
+ * @max_functions: max number of functions that can be configured in this EPC
+ * @lock: spinlock to protect pci_epc ops
+ */
+struct pci_epc {
+ struct device dev;
+ struct list_head pci_epf;
+ const struct pci_epc_ops *ops;
+ struct pci_epc_mem *mem;
+ u8 max_functions;
+ /* spinlock to protect against concurrent access of EP controller */
+ spinlock_t lock;
+};
+
+#define to_pci_epc(device) container_of((device), struct pci_epc, dev)
+
+#define pci_epc_create(dev, ops) \
+ __pci_epc_create((dev), (ops), THIS_MODULE)
+#define devm_pci_epc_create(dev, ops) \
+ __devm_pci_epc_create((dev), (ops), THIS_MODULE)
+
+static inline void epc_set_drvdata(struct pci_epc *epc, void *data)
+{
+ dev_set_drvdata(&epc->dev, data);
+}
+
+static inline void *epc_get_drvdata(struct pci_epc *epc)
+{
+ return dev_get_drvdata(&epc->dev);
+}
+
+struct pci_epc *
+__devm_pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
+ struct module *owner);
+struct pci_epc *
+__pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
+ struct module *owner);
+void devm_pci_epc_destroy(struct device *dev, struct pci_epc *epc);
+void pci_epc_destroy(struct pci_epc *epc);
+int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf);
+void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf);
+int pci_epc_write_header(struct pci_epc *epc, struct pci_epf_header *hdr);
+int pci_epc_set_bar(struct pci_epc *epc, enum pci_barno bar,
+ dma_addr_t bar_phys, size_t size, int flags);
+void pci_epc_clear_bar(struct pci_epc *epc, int bar);
+int pci_epc_map_addr(struct pci_epc *epc, phys_addr_t phys_addr,
+ u64 pci_addr, size_t size);
+void pci_epc_unmap_addr(struct pci_epc *epc, phys_addr_t phys_addr);
+int pci_epc_set_msi(struct pci_epc *epc, u8 interrupts);
+int pci_epc_get_msi(struct pci_epc *epc);
+int pci_epc_raise_irq(struct pci_epc *epc, enum pci_epc_irq_type type,
+ u8 interrupt_num);
+int pci_epc_start(struct pci_epc *epc);
+void pci_epc_stop(struct pci_epc *epc);
+struct pci_epc *pci_epc_get(char *epc_name);
+void pci_epc_put(struct pci_epc *epc);
+
+int pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_addr, size_t size);
+void pci_epc_mem_exit(struct pci_epc *epc);
+void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
+ phys_addr_t *phys_addr, size_t size);
+void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr,
+ void __iomem *virt_addr, size_t size);
+#endif /* __LINUX_PCI_EPC_H */
diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
new file mode 100644
index 0000000..24d4b20
--- /dev/null
+++ b/include/linux/pci-epf.h
@@ -0,0 +1,160 @@
+/**
+ * pci-epf.h - PCI Endpoint *Function* (EPF) header file
+ *
+ * Copyright (C) 2016 Texas Instruments
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 of
+ * the License as published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_PCI_EPF_H
+#define __LINUX_PCI_EPF_H
+
+#include <linux/device.h>
+#include <linux/mod_devicetable.h>
+
+struct pci_epf;
+
+enum pci_interrupt_pin {
+ PCI_INTERRUPT_UNKNOWN,
+ PCI_INTERRUPT_INTA,
+ PCI_INTERRUPT_INTB,
+ PCI_INTERRUPT_INTC,
+ PCI_INTERRUPT_INTD,
+};
+
+enum pci_barno {
+ BAR_0,
+ BAR_1,
+ BAR_2,
+ BAR_3,
+ BAR_4,
+ BAR_5,
+};
+
+/**
+ * struct pci_epf_header - represents standard configuration header
+ * @vendorid: identifies device manufacturer
+ * @deviceid: identifies a particular device
+ * @revid: specifies a device specific revision identifier
+ * @progif_code: identifies a specific register-level programming interface
+ * @subclass_code: identifies more specifically the function of the device
+ * @baseclass_code: broadly classifies the type of function the device performs
+ * @cache_line_size: specifies the system cacheline size in units of DWORDs
+ * @subsys_vendor_id: vendor of the add-in card or subsystem
+ * @subsys_id: id specific to vendor
+ * @interrupt_pin: interrupt pin the device (or device function) uses
+ */
+struct pci_epf_header {
+ u16 vendorid;
+ u16 deviceid;
+ u8 revid;
+ u8 progif_code;
+ u8 subclass_code;
+ u8 baseclass_code;
+ u8 cache_line_size;
+ u16 subsys_vendor_id;
+ u16 subsys_id;
+ enum pci_interrupt_pin interrupt_pin;
+};
+
+/**
+ * struct pci_epf_ops - set of function pointers for performing EPF operations
+ * @bind: ops to perform when a EPC device has been bound to EPF device
+ * @unbind: ops to perform when a binding has been lost between a EPC device
+ * and EPF device
+ * @linkup: ops to perform when the EPC device has established a connection with
+ * a host system
+ */
+struct pci_epf_ops {
+ int (*bind)(struct pci_epf *epf);
+ void (*unbind)(struct pci_epf *epf);
+ void (*linkup)(struct pci_epf *epf);
+};
+
+/**
+ * struct pci_epf_driver - represents the PCI EPF driver
+ * @probe: ops to perform when a new EPF device has been bound to the EPF driver
+ * @remove: ops to perform when the binding between the EPF device and EPF
+ * driver is broken
+ * @driver: PCI EPF driver
+ * @ops: set of function pointers for performing EPF operations
+ * @owner: the owner of the module that registers the PCI EPF driver
+ * @id_table: identifies EPF devices for probing
+ */
+struct pci_epf_driver {
+ int (*probe)(struct pci_epf *epf);
+ int (*remove)(struct pci_epf *epf);
+
+ struct device_driver driver;
+ struct pci_epf_ops *ops;
+ struct module *owner;
+ const struct pci_epf_device_id *id_table;
+};
+
+#define to_pci_epf_driver(drv) (container_of((drv), struct pci_epf_driver, \
+ driver))
+
+/**
+ * struct pci_epf_bar - represents the BAR of EPF device
+ * @phys_addr: physical address that should be mapped to the BAR
+ * @size: the size of the address space present in BAR
+ */
+struct pci_epf_bar {
+ dma_addr_t phys_addr;
+ size_t size;
+};
+
+/**
+ * struct pci_epf - represents the PCI EPF device
+ * @dev: the PCI EPF device
+ * @name: the name of the PCI EPF device
+ * @header: represents standard configuration header
+ * @bar: represents the BAR of EPF device
+ * @msi_interrupts: number of msi interrupts required by this function
+ * @func_no: unique function number within this endpoint device
+ * @epc: the EPC device to which this EPF device is bound
+ * @driver: the EPF driver to which this EPF device is bound
+ * @list: to add pci_epf as a list of pci endpoint functions to pci_epc
+ */
+struct pci_epf {
+ struct device dev;
+ const char *name;
+ struct pci_epf_header *header;
+ struct pci_epf_bar bar[6];
+ u8 msi_interrupts;
+ u8 func_no;
+
+ struct pci_epc *epc;
+ struct pci_epf_driver *driver;
+ struct list_head list;
+};
+
+#define to_pci_epf(epf_dev) container_of((epf_dev), struct pci_epf, dev)
+
+#define pci_epf_register_driver(driver) \
+ __pci_epf_register_driver((driver), THIS_MODULE)
+
+static inline void epf_set_drvdata(struct pci_epf *epf, void *data)
+{
+ dev_set_drvdata(&epf->dev, data);
+}
+
+static inline void *epf_get_drvdata(struct pci_epf *epf)
+{
+ return dev_get_drvdata(&epf->dev);
+}
+
+struct pci_epf *pci_epf_create(const char *name);
+void pci_epf_destroy(struct pci_epf *epf);
+int __pci_epf_register_driver(struct pci_epf_driver *driver,
+ struct module *owner);
+void pci_epf_unregister_driver(struct pci_epf_driver *driver);
+void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar);
+void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar);
+int pci_epf_bind(struct pci_epf *epf);
+void pci_epf_unbind(struct pci_epf *epf);
+void pci_epf_linkup(struct pci_epf *epf);
+#endif /* __LINUX_PCI_EPF_H */
--
1.7.9.5
^ permalink raw reply related
* [PATCH 13/37] PCI: dwc: Remove dependency of designware to CONFIG_PCI
From: Kishon Vijay Abraham I @ 2017-01-12 10:26 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
CONFIG_PCI is used to enable the host mode PCI. In preparation for adding
endpoint mode support to designware driver, remove the dependency of
designware to CONFIG_PCI and make only the host specific part depend on
CONFIG_PCI.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/Makefile | 3 +++
drivers/pci/Makefile | 3 ---
drivers/pci/dwc/Kconfig | 13 ++++++++++++-
3 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/Makefile b/drivers/Makefile
index 060026a..f521cb0 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -15,6 +15,9 @@ obj-$(CONFIG_PINCTRL) += pinctrl/
obj-$(CONFIG_GPIOLIB) += gpio/
obj-y += pwm/
obj-$(CONFIG_PCI) += pci/
+# PCI dwc controller drivers
+obj-y += pci/dwc/
+
obj-$(CONFIG_PARISC) += parisc/
obj-$(CONFIG_RAPIDIO) += rapidio/
obj-y += video/
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index b7e9751..8db5079 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -66,8 +66,5 @@ obj-$(CONFIG_OF) += of.o
ccflags-$(CONFIG_PCI_DEBUG) := -DDEBUG
-# PCI dwc controller drivers
-obj-y += dwc/
-
# PCI host controller drivers
obj-y += host/
diff --git a/drivers/pci/dwc/Kconfig b/drivers/pci/dwc/Kconfig
index d0bdfb5..bee8b52 100644
--- a/drivers/pci/dwc/Kconfig
+++ b/drivers/pci/dwc/Kconfig
@@ -1,16 +1,17 @@
menu "DesignWare PCI Core Support"
- depends on PCI
config PCIE_DW
bool
config PCIE_DW_HOST
bool
+ depends on PCI
depends on PCI_MSI_IRQ_DOMAIN
select PCIE_DW
config PCI_DRA7XX
bool "TI DRA7xx PCIe controller"
+ depends on PCI
depends on OF && HAS_IOMEM && TI_PIPE3
depends on PCI_MSI_IRQ_DOMAIN
select PCIE_DW_HOST
@@ -21,6 +22,7 @@ config PCI_DRA7XX
config PCIE_DW_PLAT
bool "Platform bus based DesignWare PCIe Controller"
+ depends on PCI
depends on PCI_MSI_IRQ_DOMAIN
select PCIE_DW_HOST
---help---
@@ -33,6 +35,7 @@ config PCIE_DW_PLAT
config PCI_EXYNOS
bool "Samsung Exynos PCIe controller"
+ depends on PCI
depends on SOC_EXYNOS5440 || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
@@ -40,6 +43,7 @@ config PCI_EXYNOS
config PCI_IMX6
bool "Freescale i.MX6 PCIe controller"
+ depends on PCI
depends on SOC_IMX6Q || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
@@ -47,6 +51,7 @@ config PCI_IMX6
config PCIE_SPEAR13XX
bool "STMicroelectronics SPEAr PCIe controller"
+ depends on PCI
depends on ARCH_SPEAR13XX || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
@@ -56,6 +61,7 @@ config PCIE_SPEAR13XX
config PCI_KEYSTONE
bool "TI Keystone PCIe controller"
+ depends on PCI
depends on ARCH_KEYSTONE || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
@@ -68,6 +74,7 @@ config PCI_KEYSTONE
config PCI_LAYERSCAPE
bool "Freescale Layerscape PCIe controller"
+ depends on PCI
depends on OF && (ARM || ARCH_LAYERSCAPE || COMPILE_TEST)
depends on PCI_MSI_IRQ_DOMAIN
select MFD_SYSCON
@@ -78,6 +85,7 @@ config PCI_LAYERSCAPE
config PCI_HISI
depends on OF && ARM64
bool "HiSilicon Hip05 and Hip06 SoCs PCIe controllers"
+ depends on PCI
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
select PCIE_DW_HOST
@@ -87,6 +95,7 @@ config PCI_HISI
config PCIE_QCOM
bool "Qualcomm PCIe controller"
+ depends on PCI
depends on (ARCH_QCOM || COMPILE_TEST) && OF
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
@@ -98,6 +107,7 @@ config PCIE_QCOM
config PCIE_ARMADA_8K
bool "Marvell Armada-8K PCIe controller"
+ depends on PCI
depends on ARCH_MVEBU || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
@@ -110,6 +120,7 @@ config PCIE_ARMADA_8K
config PCIE_ARTPEC6
bool "Axis ARTPEC-6 PCIe controller"
+ depends on PCI
depends on MACH_ARTPEC6 || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
--
1.7.9.5
^ permalink raw reply related
* [PATCH 12/37] PCI: dwc: Create a new config symbol to enable pci dwc host
From: Kishon Vijay Abraham I @ 2017-01-12 10:26 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
Now that pci designware host has a separate file, create a new
config symbol to select the host only driver. This is in preparation
to enable endpoint support to designware driver.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/Kconfig | 26 +++++++++++++++-----------
drivers/pci/dwc/Makefile | 3 ++-
drivers/pci/dwc/pcie-designware.h | 29 +++++++++++++++++++++++++----
3 files changed, 42 insertions(+), 16 deletions(-)
diff --git a/drivers/pci/dwc/Kconfig b/drivers/pci/dwc/Kconfig
index 8b08519..d0bdfb5 100644
--- a/drivers/pci/dwc/Kconfig
+++ b/drivers/pci/dwc/Kconfig
@@ -3,13 +3,17 @@ menu "DesignWare PCI Core Support"
config PCIE_DW
bool
+
+config PCIE_DW_HOST
+ bool
depends on PCI_MSI_IRQ_DOMAIN
+ select PCIE_DW
config PCI_DRA7XX
bool "TI DRA7xx PCIe controller"
depends on OF && HAS_IOMEM && TI_PIPE3
depends on PCI_MSI_IRQ_DOMAIN
- select PCIE_DW
+ select PCIE_DW_HOST
help
Enables support for the PCIe controller in the DRA7xx SoC. There
are two instances of PCIe controller in DRA7xx. This controller can
@@ -18,7 +22,7 @@ config PCI_DRA7XX
config PCIE_DW_PLAT
bool "Platform bus based DesignWare PCIe Controller"
depends on PCI_MSI_IRQ_DOMAIN
- select PCIE_DW
+ select PCIE_DW_HOST
---help---
This selects the DesignWare PCIe controller support. Select this if
you have a PCIe controller on Platform bus.
@@ -32,21 +36,21 @@ config PCI_EXYNOS
depends on SOC_EXYNOS5440 || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
- select PCIE_DW
+ select PCIE_DW_HOST
config PCI_IMX6
bool "Freescale i.MX6 PCIe controller"
depends on SOC_IMX6Q || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
- select PCIE_DW
+ select PCIE_DW_HOST
config PCIE_SPEAR13XX
bool "STMicroelectronics SPEAr PCIe controller"
depends on ARCH_SPEAR13XX || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
- select PCIE_DW
+ select PCIE_DW_HOST
help
Say Y here if you want PCIe support on SPEAr13XX SoCs.
@@ -55,7 +59,7 @@ config PCI_KEYSTONE
depends on ARCH_KEYSTONE || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
- select PCIE_DW
+ select PCIE_DW_HOST
help
Say Y here if you want to enable PCI controller support on Keystone
SoCs. The PCI controller on Keystone is based on Designware hardware
@@ -67,7 +71,7 @@ config PCI_LAYERSCAPE
depends on OF && (ARM || ARCH_LAYERSCAPE || COMPILE_TEST)
depends on PCI_MSI_IRQ_DOMAIN
select MFD_SYSCON
- select PCIE_DW
+ select PCIE_DW_HOST
help
Say Y here if you want PCIe controller support on Layerscape SoCs.
@@ -76,7 +80,7 @@ config PCI_HISI
bool "HiSilicon Hip05 and Hip06 SoCs PCIe controllers"
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
- select PCIE_DW
+ select PCIE_DW_HOST
help
Say Y here if you want PCIe controller support on HiSilicon
Hip05 and Hip06 SoCs
@@ -86,7 +90,7 @@ config PCIE_QCOM
depends on (ARCH_QCOM || COMPILE_TEST) && OF
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
- select PCIE_DW
+ select PCIE_DW_HOST
help
Say Y here to enable PCIe controller support on Qualcomm SoCs. The
PCIe controller uses the Designware core plus Qualcomm-specific
@@ -97,7 +101,7 @@ config PCIE_ARMADA_8K
depends on ARCH_MVEBU || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
- select PCIE_DW
+ select PCIE_DW_HOST
help
Say Y here if you want to enable PCIe controller support on
Armada-8K SoCs. The PCIe controller on Armada-8K is based on
@@ -109,7 +113,7 @@ config PCIE_ARTPEC6
depends on MACH_ARTPEC6 || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIEPORTBUS
- select PCIE_DW
+ select PCIE_DW_HOST
help
Say Y here to enable PCIe controller support on Axis ARTPEC-6
SoCs. This PCIe controller uses the DesignWare core.
diff --git a/drivers/pci/dwc/Makefile b/drivers/pci/dwc/Makefile
index 3b57e55..a2df13c 100644
--- a/drivers/pci/dwc/Makefile
+++ b/drivers/pci/dwc/Makefile
@@ -1,4 +1,5 @@
-obj-$(CONFIG_PCIE_DW) += pcie-designware.o pcie-designware-host.o
+obj-$(CONFIG_PCIE_DW) += pcie-designware.o
+obj-$(CONFIG_PCIE_DW_HOST) += pcie-designware-host.o
obj-$(CONFIG_PCIE_DW_PLAT) += pcie-designware-plat.o
obj-$(CONFIG_PCI_DRA7XX) += pci-dra7xx.o
obj-$(CONFIG_PCI_EXYNOS) += pci-exynos.o
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index 808d17b..8f3dcb2 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -162,10 +162,6 @@ struct dw_pcie {
int dw_pcie_read(void __iomem *addr, int size, u32 *val);
int dw_pcie_write(void __iomem *addr, int size, u32 val);
-irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
-void dw_pcie_msi_init(struct pcie_port *pp);
-void dw_pcie_setup_rc(struct pcie_port *pp);
-int dw_pcie_host_init(struct pcie_port *pp);
u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg);
void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val);
@@ -175,4 +171,29 @@ void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
int type, u64 cpu_addr, u64 pci_addr,
u32 size);
void dw_pcie_setup(struct dw_pcie *pci);
+
+#ifdef CONFIG_PCIE_DW_HOST
+irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
+void dw_pcie_msi_init(struct pcie_port *pp);
+void dw_pcie_setup_rc(struct pcie_port *pp);
+int dw_pcie_host_init(struct pcie_port *pp);
+#else
+static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
+{
+ return IRQ_NONE;
+}
+
+static inline void dw_pcie_msi_init(struct pcie_port *pp)
+{
+}
+
+static inline void dw_pcie_setup_rc(struct pcie_port *pp)
+{
+}
+
+static inline int dw_pcie_host_init(struct pcie_port *pp)
+{
+ return 0;
+}
+#endif
#endif /* _PCIE_DESIGNWARE_H */
--
1.7.9.5
^ permalink raw reply related
* [PATCH 11/37] PCI: dwc: Split pcie-designware.c into host and core files
From: Kishon Vijay Abraham I @ 2017-01-12 10:26 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
Split pcie-designware.c into pcie-designware-host.c that contains
the host specific parts of the driver and pcie-designware.c that
contains the parts used by both host driver and endpoint driver.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/Makefile | 2 +-
drivers/pci/dwc/pcie-designware-host.c | 619 ++++++++++++++++++++++++++++++++
drivers/pci/dwc/pcie-designware.c | 613 +------------------------------
drivers/pci/dwc/pcie-designware.h | 8 +
4 files changed, 634 insertions(+), 608 deletions(-)
create mode 100644 drivers/pci/dwc/pcie-designware-host.c
diff --git a/drivers/pci/dwc/Makefile b/drivers/pci/dwc/Makefile
index 7d27c14..3b57e55 100644
--- a/drivers/pci/dwc/Makefile
+++ b/drivers/pci/dwc/Makefile
@@ -1,4 +1,4 @@
-obj-$(CONFIG_PCIE_DW) += pcie-designware.o
+obj-$(CONFIG_PCIE_DW) += pcie-designware.o pcie-designware-host.o
obj-$(CONFIG_PCIE_DW_PLAT) += pcie-designware-plat.o
obj-$(CONFIG_PCI_DRA7XX) += pci-dra7xx.o
obj-$(CONFIG_PCI_EXYNOS) += pci-exynos.o
diff --git a/drivers/pci/dwc/pcie-designware-host.c b/drivers/pci/dwc/pcie-designware-host.c
new file mode 100644
index 0000000..e7eb653
--- /dev/null
+++ b/drivers/pci/dwc/pcie-designware-host.c
@@ -0,0 +1,619 @@
+/*
+ * Synopsys Designware PCIe host controller driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/irqdomain.h>
+#include <linux/of_address.h>
+#include <linux/of_pci.h>
+#include <linux/pci_regs.h>
+#include <linux/platform_device.h>
+
+#include "pcie-designware.h"
+
+static struct pci_ops dw_pcie_ops;
+
+static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
+ u32 *val)
+{
+ struct dw_pcie *pci;
+
+ if (pp->ops->rd_own_conf)
+ return pp->ops->rd_own_conf(pp, where, size, val);
+
+ pci = to_dw_pcie_from_pp(pp);
+ return dw_pcie_read(pci->dbi_base + where, size, val);
+}
+
+static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
+ u32 val)
+{
+ struct dw_pcie *pci;
+
+ if (pp->ops->wr_own_conf)
+ return pp->ops->wr_own_conf(pp, where, size, val);
+
+ pci = to_dw_pcie_from_pp(pp);
+ return dw_pcie_write(pci->dbi_base + where, size, val);
+}
+
+static struct irq_chip dw_msi_irq_chip = {
+ .name = "PCI-MSI",
+ .irq_enable = pci_msi_unmask_irq,
+ .irq_disable = pci_msi_mask_irq,
+ .irq_mask = pci_msi_mask_irq,
+ .irq_unmask = pci_msi_unmask_irq,
+};
+
+/* MSI int handler */
+irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
+{
+ unsigned long val;
+ int i, pos, irq;
+ irqreturn_t ret = IRQ_NONE;
+
+ for (i = 0; i < MAX_MSI_CTRLS; i++) {
+ dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4,
+ (u32 *)&val);
+ if (val) {
+ ret = IRQ_HANDLED;
+ pos = 0;
+ while ((pos = find_next_bit(&val, 32, pos)) != 32) {
+ irq = irq_find_mapping(pp->irq_domain,
+ i * 32 + pos);
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS +
+ i * 12, 4, 1 << pos);
+ generic_handle_irq(irq);
+ pos++;
+ }
+ }
+ }
+
+ return ret;
+}
+
+void dw_pcie_msi_init(struct pcie_port *pp)
+{
+ u64 msi_target;
+
+ pp->msi_data = __get_free_pages(GFP_KERNEL, 0);
+ msi_target = virt_to_phys((void *)pp->msi_data);
+
+ /* program the msi_data */
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
+ (u32)(msi_target & 0xffffffff));
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
+ (u32)(msi_target >> 32 & 0xffffffff));
+}
+
+static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
+{
+ unsigned int res, bit, val;
+
+ res = (irq / 32) * 12;
+ bit = irq % 32;
+ dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
+ val &= ~(1 << bit);
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
+}
+
+static void clear_irq_range(struct pcie_port *pp, unsigned int irq_base,
+ unsigned int nvec, unsigned int pos)
+{
+ unsigned int i;
+
+ for (i = 0; i < nvec; i++) {
+ irq_set_msi_desc_off(irq_base, i, NULL);
+ /* Disable corresponding interrupt on MSI controller */
+ if (pp->ops->msi_clear_irq)
+ pp->ops->msi_clear_irq(pp, pos + i);
+ else
+ dw_pcie_msi_clear_irq(pp, pos + i);
+ }
+
+ bitmap_release_region(pp->msi_irq_in_use, pos, order_base_2(nvec));
+}
+
+static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
+{
+ unsigned int res, bit, val;
+
+ res = (irq / 32) * 12;
+ bit = irq % 32;
+ dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
+ val |= 1 << bit;
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
+}
+
+static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
+{
+ int irq, pos0, i;
+ struct pcie_port *pp;
+
+ pp = (struct pcie_port *)msi_desc_to_pci_sysdata(desc);
+ pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
+ order_base_2(no_irqs));
+ if (pos0 < 0)
+ goto no_valid_irq;
+
+ irq = irq_find_mapping(pp->irq_domain, pos0);
+ if (!irq)
+ goto no_valid_irq;
+
+ /*
+ * irq_create_mapping (called from dw_pcie_host_init) pre-allocates
+ * descs so there is no need to allocate descs here. We can therefore
+ * assume that if irq_find_mapping above returns non-zero, then the
+ * descs are also successfully allocated.
+ */
+
+ for (i = 0; i < no_irqs; i++) {
+ if (irq_set_msi_desc_off(irq, i, desc) != 0) {
+ clear_irq_range(pp, irq, i, pos0);
+ goto no_valid_irq;
+ }
+ /*Enable corresponding interrupt in MSI interrupt controller */
+ if (pp->ops->msi_set_irq)
+ pp->ops->msi_set_irq(pp, pos0 + i);
+ else
+ dw_pcie_msi_set_irq(pp, pos0 + i);
+ }
+
+ *pos = pos0;
+ desc->nvec_used = no_irqs;
+ desc->msi_attrib.multiple = order_base_2(no_irqs);
+
+ return irq;
+
+no_valid_irq:
+ *pos = pos0;
+ return -ENOSPC;
+}
+
+static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos)
+{
+ struct msi_msg msg;
+ u64 msi_target;
+
+ if (pp->ops->get_msi_addr)
+ msi_target = pp->ops->get_msi_addr(pp);
+ else
+ msi_target = virt_to_phys((void *)pp->msi_data);
+
+ msg.address_lo = (u32)(msi_target & 0xffffffff);
+ msg.address_hi = (u32)(msi_target >> 32 & 0xffffffff);
+
+ if (pp->ops->get_msi_data)
+ msg.data = pp->ops->get_msi_data(pp, pos);
+ else
+ msg.data = pos;
+
+ pci_write_msi_msg(irq, &msg);
+}
+
+static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
+ struct msi_desc *desc)
+{
+ int irq, pos;
+ struct pcie_port *pp = pdev->bus->sysdata;
+
+ if (desc->msi_attrib.is_msix)
+ return -EINVAL;
+
+ irq = assign_irq(1, desc, &pos);
+ if (irq < 0)
+ return irq;
+
+ dw_msi_setup_msg(pp, irq, pos);
+
+ return 0;
+}
+
+static int dw_msi_setup_irqs(struct msi_controller *chip, struct pci_dev *pdev,
+ int nvec, int type)
+{
+#ifdef CONFIG_PCI_MSI
+ int irq, pos;
+ struct msi_desc *desc;
+ struct pcie_port *pp = pdev->bus->sysdata;
+
+ /* MSI-X interrupts are not supported */
+ if (type == PCI_CAP_ID_MSIX)
+ return -EINVAL;
+
+ WARN_ON(!list_is_singular(&pdev->dev.msi_list));
+ desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list);
+
+ irq = assign_irq(nvec, desc, &pos);
+ if (irq < 0)
+ return irq;
+
+ dw_msi_setup_msg(pp, irq, pos);
+
+ return 0;
+#else
+ return -EINVAL;
+#endif
+}
+
+static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
+{
+ struct irq_data *data = irq_get_irq_data(irq);
+ struct msi_desc *msi = irq_data_get_msi_desc(data);
+ struct pcie_port *pp = (struct pcie_port *)msi_desc_to_pci_sysdata(msi);
+
+ clear_irq_range(pp, irq, 1, data->hwirq);
+}
+
+static struct msi_controller dw_pcie_msi_chip = {
+ .setup_irq = dw_msi_setup_irq,
+ .setup_irqs = dw_msi_setup_irqs,
+ .teardown_irq = dw_msi_teardown_irq,
+};
+
+static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ irq_set_chip_and_handler(irq, &dw_msi_irq_chip, handle_simple_irq);
+ irq_set_chip_data(irq, domain->host_data);
+
+ return 0;
+}
+
+static const struct irq_domain_ops msi_domain_ops = {
+ .map = dw_pcie_msi_map,
+};
+
+int dw_pcie_host_init(struct pcie_port *pp)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct device *dev = pci->dev;
+ struct device_node *np = dev->of_node;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct pci_bus *bus, *child;
+ struct resource *cfg_res;
+ int i, ret;
+ LIST_HEAD(res);
+ struct resource_entry *win, *tmp;
+
+ cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
+ if (cfg_res) {
+ pp->cfg0_size = resource_size(cfg_res) / 2;
+ pp->cfg1_size = resource_size(cfg_res) / 2;
+ pp->cfg0_base = cfg_res->start;
+ pp->cfg1_base = cfg_res->start + pp->cfg0_size;
+ } else if (!pp->va_cfg0_base) {
+ dev_err(dev, "missing *config* reg space\n");
+ }
+
+ ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp->io_base);
+ if (ret)
+ return ret;
+
+ ret = devm_request_pci_bus_resources(dev, &res);
+ if (ret)
+ goto error;
+
+ /* Get the I/O and memory ranges from DT */
+ resource_list_for_each_entry_safe(win, tmp, &res) {
+ switch (resource_type(win->res)) {
+ case IORESOURCE_IO:
+ ret = pci_remap_iospace(win->res, pp->io_base);
+ if (ret) {
+ dev_warn(dev, "error %d: failed to map resource %pR\n",
+ ret, win->res);
+ resource_list_destroy_entry(win);
+ } else {
+ pp->io = win->res;
+ pp->io->name = "I/O";
+ pp->io_size = resource_size(pp->io);
+ pp->io_bus_addr = pp->io->start - win->offset;
+ }
+ break;
+ case IORESOURCE_MEM:
+ pp->mem = win->res;
+ pp->mem->name = "MEM";
+ pp->mem_size = resource_size(pp->mem);
+ pp->mem_bus_addr = pp->mem->start - win->offset;
+ break;
+ case 0:
+ pp->cfg = win->res;
+ pp->cfg0_size = resource_size(pp->cfg) / 2;
+ pp->cfg1_size = resource_size(pp->cfg) / 2;
+ pp->cfg0_base = pp->cfg->start;
+ pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
+ break;
+ case IORESOURCE_BUS:
+ pp->busn = win->res;
+ break;
+ }
+ }
+
+ if (!pci->dbi_base) {
+ pci->dbi_base = devm_ioremap(dev, pp->cfg->start,
+ resource_size(pp->cfg));
+ if (!pci->dbi_base) {
+ dev_err(dev, "error with ioremap\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+
+ pp->mem_base = pp->mem->start;
+
+ if (!pp->va_cfg0_base) {
+ pp->va_cfg0_base = devm_ioremap(dev, pp->cfg0_base,
+ pp->cfg0_size);
+ if (!pp->va_cfg0_base) {
+ dev_err(dev, "error with ioremap in function\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+
+ if (!pp->va_cfg1_base) {
+ pp->va_cfg1_base = devm_ioremap(dev, pp->cfg1_base,
+ pp->cfg1_size);
+ if (!pp->va_cfg1_base) {
+ dev_err(dev, "error with ioremap\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+
+ ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport);
+ if (ret)
+ pci->num_viewport = 2;
+
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ if (!pp->ops->msi_host_init) {
+ pp->irq_domain = irq_domain_add_linear(dev->of_node,
+ MAX_MSI_IRQS, &msi_domain_ops,
+ &dw_pcie_msi_chip);
+ if (!pp->irq_domain) {
+ dev_err(dev, "irq domain init failed\n");
+ ret = -ENXIO;
+ goto error;
+ }
+
+ for (i = 0; i < MAX_MSI_IRQS; i++)
+ irq_create_mapping(pp->irq_domain, i);
+ } else {
+ ret = pp->ops->msi_host_init(pp, &dw_pcie_msi_chip);
+ if (ret < 0)
+ goto error;
+ }
+ }
+
+ if (pp->ops->host_init)
+ pp->ops->host_init(pp);
+
+ pp->root_bus_nr = pp->busn->start;
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ bus = pci_scan_root_bus_msi(dev, pp->root_bus_nr,
+ &dw_pcie_ops, pp, &res,
+ &dw_pcie_msi_chip);
+ dw_pcie_msi_chip.dev = dev;
+ } else
+ bus = pci_scan_root_bus(dev, pp->root_bus_nr, &dw_pcie_ops,
+ pp, &res);
+ if (!bus) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ if (pp->ops->scan_bus)
+ pp->ops->scan_bus(pp);
+
+#ifdef CONFIG_ARM
+ /* support old dtbs that incorrectly describe IRQs */
+ pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+#endif
+
+ pci_bus_size_bridges(bus);
+ pci_bus_assign_resources(bus);
+
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+
+ pci_bus_add_devices(bus);
+ return 0;
+
+error:
+ pci_free_resource_list(&res);
+ return ret;
+}
+
+static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
+ u32 devfn, int where, int size, u32 *val)
+{
+ int ret, type;
+ u32 busdev, cfg_size;
+ u64 cpu_addr;
+ void __iomem *va_cfg_base;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ if (pp->ops->rd_other_conf)
+ return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
+
+ busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
+ PCIE_ATU_FUNC(PCI_FUNC(devfn));
+
+ if (bus->parent->number == pp->root_bus_nr) {
+ type = PCIE_ATU_TYPE_CFG0;
+ cpu_addr = pp->cfg0_base;
+ cfg_size = pp->cfg0_size;
+ va_cfg_base = pp->va_cfg0_base;
+ } else {
+ type = PCIE_ATU_TYPE_CFG1;
+ cpu_addr = pp->cfg1_base;
+ cfg_size = pp->cfg1_size;
+ va_cfg_base = pp->va_cfg1_base;
+ }
+
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ type, cpu_addr,
+ busdev, cfg_size);
+ ret = dw_pcie_read(va_cfg_base + where, size, val);
+ if (pci->num_viewport <= 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ PCIE_ATU_TYPE_IO, pp->io_base,
+ pp->io_bus_addr, pp->io_size);
+
+ return ret;
+}
+
+static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
+ u32 devfn, int where, int size, u32 val)
+{
+ int ret, type;
+ u32 busdev, cfg_size;
+ u64 cpu_addr;
+ void __iomem *va_cfg_base;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ if (pp->ops->wr_other_conf)
+ return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
+
+ busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
+ PCIE_ATU_FUNC(PCI_FUNC(devfn));
+
+ if (bus->parent->number == pp->root_bus_nr) {
+ type = PCIE_ATU_TYPE_CFG0;
+ cpu_addr = pp->cfg0_base;
+ cfg_size = pp->cfg0_size;
+ va_cfg_base = pp->va_cfg0_base;
+ } else {
+ type = PCIE_ATU_TYPE_CFG1;
+ cpu_addr = pp->cfg1_base;
+ cfg_size = pp->cfg1_size;
+ va_cfg_base = pp->va_cfg1_base;
+ }
+
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ type, cpu_addr,
+ busdev, cfg_size);
+ ret = dw_pcie_write(va_cfg_base + where, size, val);
+ if (pci->num_viewport <= 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
+ PCIE_ATU_TYPE_IO, pp->io_base,
+ pp->io_bus_addr, pp->io_size);
+
+ return ret;
+}
+
+static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus,
+ int dev)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ /* If there is no link, then there is no device */
+ if (bus->number != pp->root_bus_nr) {
+ if (!dw_pcie_link_up(pci))
+ return 0;
+ }
+
+ /* access only one slot on each root port */
+ if (bus->number == pp->root_bus_nr && dev > 0)
+ return 0;
+
+ return 1;
+}
+
+static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
+ int size, u32 *val)
+{
+ struct pcie_port *pp = bus->sysdata;
+
+ if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn))) {
+ *val = 0xffffffff;
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+
+ if (bus->number == pp->root_bus_nr)
+ return dw_pcie_rd_own_conf(pp, where, size, val);
+
+ return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
+}
+
+static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
+ int where, int size, u32 val)
+{
+ struct pcie_port *pp = bus->sysdata;
+
+ if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn)))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ if (bus->number == pp->root_bus_nr)
+ return dw_pcie_wr_own_conf(pp, where, size, val);
+
+ return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
+}
+
+static struct pci_ops dw_pcie_ops = {
+ .read = dw_pcie_rd_conf,
+ .write = dw_pcie_wr_conf,
+};
+
+void dw_pcie_setup_rc(struct pcie_port *pp)
+{
+ u32 val;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ dw_pcie_setup(pci);
+
+ /* setup RC BARs */
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000);
+
+ /* setup interrupt pins */
+ val = dw_pcie_readl_dbi(pci, PCI_INTERRUPT_LINE);
+ val &= 0xffff00ff;
+ val |= 0x00000100;
+ dw_pcie_writel_dbi(pci, PCI_INTERRUPT_LINE, val);
+
+ /* setup bus numbers */
+ val = dw_pcie_readl_dbi(pci, PCI_PRIMARY_BUS);
+ val &= 0xff000000;
+ val |= 0x00010100;
+ dw_pcie_writel_dbi(pci, PCI_PRIMARY_BUS, val);
+
+ /* setup command register */
+ val = dw_pcie_readl_dbi(pci, PCI_COMMAND);
+ val &= 0xffff0000;
+ val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
+ PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
+ dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
+
+ /*
+ * If the platform provides ->rd_other_conf, it means the platform
+ * uses its own address translation component rather than ATU, so
+ * we should not program the ATU here.
+ */
+ if (!pp->ops->rd_other_conf) {
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX0,
+ PCIE_ATU_TYPE_MEM, pp->mem_base,
+ pp->mem_bus_addr, pp->mem_size);
+ if (pci->num_viewport > 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX2,
+ PCIE_ATU_TYPE_IO, pp->io_base,
+ pp->io_bus_addr, pp->io_size);
+ }
+
+ dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
+
+ /* program correct class for RC */
+ dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
+
+ dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
+ val |= PORT_LOGIC_SPEED_CHANGE;
+ dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
+}
diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index ff04074..fb020ee 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -11,17 +11,9 @@
* published by the Free Software Foundation.
*/
-#include <linux/irq.h>
-#include <linux/irqdomain.h>
-#include <linux/kernel.h>
-#include <linux/msi.h>
-#include <linux/of_address.h>
-#include <linux/of_pci.h>
-#include <linux/pci.h>
-#include <linux/pci_regs.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/types.h>
#include "pcie-designware.h"
@@ -31,8 +23,6 @@
#define PCIE_PHY_DEBUG_R1_LINK_UP (0x1 << 4)
#define PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING (0x1 << 29)
-static struct pci_ops dw_pcie_ops;
-
int dw_pcie_read(void __iomem *addr, int size, u32 *val)
{
if ((uintptr_t)addr & (size - 1)) {
@@ -102,33 +92,8 @@ static void dw_pcie_writel_unroll(struct dw_pcie *pci, u32 index, u32 reg,
dw_pcie_writel_dbi(pci, offset + reg, val);
}
-static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
- u32 *val)
-{
- struct dw_pcie *pci;
-
- if (pp->ops->rd_own_conf)
- return pp->ops->rd_own_conf(pp, where, size, val);
-
- pci = to_dw_pcie_from_pp(pp);
- return dw_pcie_read(pci->dbi_base + where, size, val);
-}
-
-static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
- u32 val)
-{
- struct dw_pcie *pci;
-
- if (pp->ops->wr_own_conf)
- return pp->ops->wr_own_conf(pp, where, size, val);
-
- pci = to_dw_pcie_from_pp(pp);
- return dw_pcie_write(pci->dbi_base + where, size, val);
-}
-
-static void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
- int type, u64 cpu_addr, u64 pci_addr,
- u32 size)
+void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type,
+ u64 cpu_addr, u64 pci_addr, u32 size)
{
u32 retries, val;
@@ -186,220 +151,6 @@ static void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
dev_err(pci->dev, "iATU is not being enabled\n");
}
-static struct irq_chip dw_msi_irq_chip = {
- .name = "PCI-MSI",
- .irq_enable = pci_msi_unmask_irq,
- .irq_disable = pci_msi_mask_irq,
- .irq_mask = pci_msi_mask_irq,
- .irq_unmask = pci_msi_unmask_irq,
-};
-
-/* MSI int handler */
-irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
-{
- unsigned long val;
- int i, pos, irq;
- irqreturn_t ret = IRQ_NONE;
-
- for (i = 0; i < MAX_MSI_CTRLS; i++) {
- dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4,
- (u32 *)&val);
- if (val) {
- ret = IRQ_HANDLED;
- pos = 0;
- while ((pos = find_next_bit(&val, 32, pos)) != 32) {
- irq = irq_find_mapping(pp->irq_domain,
- i * 32 + pos);
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS +
- i * 12, 4, 1 << pos);
- generic_handle_irq(irq);
- pos++;
- }
- }
- }
-
- return ret;
-}
-
-void dw_pcie_msi_init(struct pcie_port *pp)
-{
- u64 msi_target;
-
- pp->msi_data = __get_free_pages(GFP_KERNEL, 0);
- msi_target = virt_to_phys((void *)pp->msi_data);
-
- /* program the msi_data */
- dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
- (u32)(msi_target & 0xffffffff));
- dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
- (u32)(msi_target >> 32 & 0xffffffff));
-}
-
-static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
-{
- unsigned int res, bit, val;
-
- res = (irq / 32) * 12;
- bit = irq % 32;
- dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
- val &= ~(1 << bit);
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
-}
-
-static void clear_irq_range(struct pcie_port *pp, unsigned int irq_base,
- unsigned int nvec, unsigned int pos)
-{
- unsigned int i;
-
- for (i = 0; i < nvec; i++) {
- irq_set_msi_desc_off(irq_base, i, NULL);
- /* Disable corresponding interrupt on MSI controller */
- if (pp->ops->msi_clear_irq)
- pp->ops->msi_clear_irq(pp, pos + i);
- else
- dw_pcie_msi_clear_irq(pp, pos + i);
- }
-
- bitmap_release_region(pp->msi_irq_in_use, pos, order_base_2(nvec));
-}
-
-static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
-{
- unsigned int res, bit, val;
-
- res = (irq / 32) * 12;
- bit = irq % 32;
- dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
- val |= 1 << bit;
- dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
-}
-
-static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
-{
- int irq, pos0, i;
- struct pcie_port *pp;
-
- pp = (struct pcie_port *)msi_desc_to_pci_sysdata(desc);
- pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
- order_base_2(no_irqs));
- if (pos0 < 0)
- goto no_valid_irq;
-
- irq = irq_find_mapping(pp->irq_domain, pos0);
- if (!irq)
- goto no_valid_irq;
-
- /*
- * irq_create_mapping (called from dw_pcie_host_init) pre-allocates
- * descs so there is no need to allocate descs here. We can therefore
- * assume that if irq_find_mapping above returns non-zero, then the
- * descs are also successfully allocated.
- */
-
- for (i = 0; i < no_irqs; i++) {
- if (irq_set_msi_desc_off(irq, i, desc) != 0) {
- clear_irq_range(pp, irq, i, pos0);
- goto no_valid_irq;
- }
- /*Enable corresponding interrupt in MSI interrupt controller */
- if (pp->ops->msi_set_irq)
- pp->ops->msi_set_irq(pp, pos0 + i);
- else
- dw_pcie_msi_set_irq(pp, pos0 + i);
- }
-
- *pos = pos0;
- desc->nvec_used = no_irqs;
- desc->msi_attrib.multiple = order_base_2(no_irqs);
-
- return irq;
-
-no_valid_irq:
- *pos = pos0;
- return -ENOSPC;
-}
-
-static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos)
-{
- struct msi_msg msg;
- u64 msi_target;
-
- if (pp->ops->get_msi_addr)
- msi_target = pp->ops->get_msi_addr(pp);
- else
- msi_target = virt_to_phys((void *)pp->msi_data);
-
- msg.address_lo = (u32)(msi_target & 0xffffffff);
- msg.address_hi = (u32)(msi_target >> 32 & 0xffffffff);
-
- if (pp->ops->get_msi_data)
- msg.data = pp->ops->get_msi_data(pp, pos);
- else
- msg.data = pos;
-
- pci_write_msi_msg(irq, &msg);
-}
-
-static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
- struct msi_desc *desc)
-{
- int irq, pos;
- struct pcie_port *pp = pdev->bus->sysdata;
-
- if (desc->msi_attrib.is_msix)
- return -EINVAL;
-
- irq = assign_irq(1, desc, &pos);
- if (irq < 0)
- return irq;
-
- dw_msi_setup_msg(pp, irq, pos);
-
- return 0;
-}
-
-static int dw_msi_setup_irqs(struct msi_controller *chip, struct pci_dev *pdev,
- int nvec, int type)
-{
-#ifdef CONFIG_PCI_MSI
- int irq, pos;
- struct msi_desc *desc;
- struct pcie_port *pp = pdev->bus->sysdata;
-
- /* MSI-X interrupts are not supported */
- if (type == PCI_CAP_ID_MSIX)
- return -EINVAL;
-
- WARN_ON(!list_is_singular(&pdev->dev.msi_list));
- desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list);
-
- irq = assign_irq(nvec, desc, &pos);
- if (irq < 0)
- return irq;
-
- dw_msi_setup_msg(pp, irq, pos);
-
- return 0;
-#else
- return -EINVAL;
-#endif
-}
-
-static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
-{
- struct irq_data *data = irq_get_irq_data(irq);
- struct msi_desc *msi = irq_data_get_msi_desc(data);
- struct pcie_port *pp = (struct pcie_port *)msi_desc_to_pci_sysdata(msi);
-
- clear_irq_range(pp, irq, 1, data->hwirq);
-}
-
-static struct msi_controller dw_pcie_msi_chip = {
- .setup_irq = dw_msi_setup_irq,
- .setup_irqs = dw_msi_setup_irqs,
- .teardown_irq = dw_msi_teardown_irq,
-};
-
int dw_pcie_wait_for_link(struct dw_pcie *pci)
{
int retries;
@@ -430,19 +181,6 @@ int dw_pcie_link_up(struct dw_pcie *pci)
(!(val & PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING)));
}
-static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- irq_set_chip_and_handler(irq, &dw_msi_irq_chip, handle_simple_irq);
- irq_set_chip_data(irq, domain->host_data);
-
- return 0;
-}
-
-static const struct irq_domain_ops msi_domain_ops = {
- .map = dw_pcie_msi_map,
-};
-
static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
{
u32 val;
@@ -454,303 +192,11 @@ static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
return 0;
}
-int dw_pcie_host_init(struct pcie_port *pp)
-{
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct device *dev = pci->dev;
- struct device_node *np = dev->of_node;
- struct platform_device *pdev = to_platform_device(dev);
- struct pci_bus *bus, *child;
- struct resource *cfg_res;
- int i, ret;
- LIST_HEAD(res);
- struct resource_entry *win, *tmp;
-
- cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
- if (cfg_res) {
- pp->cfg0_size = resource_size(cfg_res) / 2;
- pp->cfg1_size = resource_size(cfg_res) / 2;
- pp->cfg0_base = cfg_res->start;
- pp->cfg1_base = cfg_res->start + pp->cfg0_size;
- } else if (!pp->va_cfg0_base) {
- dev_err(dev, "missing *config* reg space\n");
- }
-
- ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp->io_base);
- if (ret)
- return ret;
-
- ret = devm_request_pci_bus_resources(dev, &res);
- if (ret)
- goto error;
-
- /* Get the I/O and memory ranges from DT */
- resource_list_for_each_entry_safe(win, tmp, &res) {
- switch (resource_type(win->res)) {
- case IORESOURCE_IO:
- ret = pci_remap_iospace(win->res, pp->io_base);
- if (ret) {
- dev_warn(dev, "error %d: failed to map resource %pR\n",
- ret, win->res);
- resource_list_destroy_entry(win);
- } else {
- pp->io = win->res;
- pp->io->name = "I/O";
- pp->io_size = resource_size(pp->io);
- pp->io_bus_addr = pp->io->start - win->offset;
- }
- break;
- case IORESOURCE_MEM:
- pp->mem = win->res;
- pp->mem->name = "MEM";
- pp->mem_size = resource_size(pp->mem);
- pp->mem_bus_addr = pp->mem->start - win->offset;
- break;
- case 0:
- pp->cfg = win->res;
- pp->cfg0_size = resource_size(pp->cfg) / 2;
- pp->cfg1_size = resource_size(pp->cfg) / 2;
- pp->cfg0_base = pp->cfg->start;
- pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
- break;
- case IORESOURCE_BUS:
- pp->busn = win->res;
- break;
- }
- }
-
- if (!pp->dbi_base) {
- pp->dbi_base = devm_ioremap(dev, pp->cfg->start,
- resource_size(pp->cfg));
- if (!pp->dbi_base) {
- dev_err(dev, "error with ioremap\n");
- ret = -ENOMEM;
- goto error;
- }
- }
-
- pp->mem_base = pp->mem->start;
-
- if (!pp->va_cfg0_base) {
- pp->va_cfg0_base = devm_ioremap(dev, pp->cfg0_base,
- pp->cfg0_size);
- if (!pp->va_cfg0_base) {
- dev_err(dev, "error with ioremap in function\n");
- ret = -ENOMEM;
- goto error;
- }
- }
-
- if (!pp->va_cfg1_base) {
- pp->va_cfg1_base = devm_ioremap(dev, pp->cfg1_base,
- pp->cfg1_size);
- if (!pp->va_cfg1_base) {
- dev_err(dev, "error with ioremap\n");
- ret = -ENOMEM;
- goto error;
- }
- }
-
- ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport);
- if (ret)
- pci->num_viewport = 2;
-
- if (IS_ENABLED(CONFIG_PCI_MSI)) {
- if (!pp->ops->msi_host_init) {
- pp->irq_domain = irq_domain_add_linear(dev->of_node,
- MAX_MSI_IRQS, &msi_domain_ops,
- &dw_pcie_msi_chip);
- if (!pp->irq_domain) {
- dev_err(dev, "irq domain init failed\n");
- ret = -ENXIO;
- goto error;
- }
-
- for (i = 0; i < MAX_MSI_IRQS; i++)
- irq_create_mapping(pp->irq_domain, i);
- } else {
- ret = pp->ops->msi_host_init(pp, &dw_pcie_msi_chip);
- if (ret < 0)
- goto error;
- }
- }
-
- if (pp->ops->host_init)
- pp->ops->host_init(pp);
-
- pp->root_bus_nr = pp->busn->start;
- if (IS_ENABLED(CONFIG_PCI_MSI)) {
- bus = pci_scan_root_bus_msi(dev, pp->root_bus_nr,
- &dw_pcie_ops, pp, &res,
- &dw_pcie_msi_chip);
- dw_pcie_msi_chip.dev = dev;
- } else
- bus = pci_scan_root_bus(dev, pp->root_bus_nr, &dw_pcie_ops,
- pp, &res);
- if (!bus) {
- ret = -ENOMEM;
- goto error;
- }
-
- if (pp->ops->scan_bus)
- pp->ops->scan_bus(pp);
-
-#ifdef CONFIG_ARM
- /* support old dtbs that incorrectly describe IRQs */
- pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
-#endif
-
- pci_bus_size_bridges(bus);
- pci_bus_assign_resources(bus);
-
- list_for_each_entry(child, &bus->children, node)
- pcie_bus_configure_settings(child);
-
- pci_bus_add_devices(bus);
- return 0;
-
-error:
- pci_free_resource_list(&res);
- return ret;
-}
-
-static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 *val)
-{
- int ret, type;
- u32 busdev, cfg_size;
- u64 cpu_addr;
- void __iomem *va_cfg_base;
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
- if (pp->ops->rd_other_conf)
- return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
-
- busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
- PCIE_ATU_FUNC(PCI_FUNC(devfn));
-
- if (bus->parent->number == pp->root_bus_nr) {
- type = PCIE_ATU_TYPE_CFG0;
- cpu_addr = pp->cfg0_base;
- cfg_size = pp->cfg0_size;
- va_cfg_base = pp->va_cfg0_base;
- } else {
- type = PCIE_ATU_TYPE_CFG1;
- cpu_addr = pp->cfg1_base;
- cfg_size = pp->cfg1_size;
- va_cfg_base = pp->va_cfg1_base;
- }
-
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
- type, cpu_addr,
- busdev, cfg_size);
- ret = dw_pcie_read(va_cfg_base + where, size, val);
- if (pci->num_viewport <= 2)
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
- PCIE_ATU_TYPE_IO, pp->io_base,
- pp->io_bus_addr, pp->io_size);
-
- return ret;
-}
-
-static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 val)
-{
- int ret, type;
- u32 busdev, cfg_size;
- u64 cpu_addr;
- void __iomem *va_cfg_base;
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
- if (pp->ops->wr_other_conf)
- return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
-
- busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
- PCIE_ATU_FUNC(PCI_FUNC(devfn));
-
- if (bus->parent->number == pp->root_bus_nr) {
- type = PCIE_ATU_TYPE_CFG0;
- cpu_addr = pp->cfg0_base;
- cfg_size = pp->cfg0_size;
- va_cfg_base = pp->va_cfg0_base;
- } else {
- type = PCIE_ATU_TYPE_CFG1;
- cpu_addr = pp->cfg1_base;
- cfg_size = pp->cfg1_size;
- va_cfg_base = pp->va_cfg1_base;
- }
-
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
- type, cpu_addr,
- busdev, cfg_size);
- ret = dw_pcie_write(va_cfg_base + where, size, val);
- if (pci->num_viewport <= 2)
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
- PCIE_ATU_TYPE_IO, pp->io_base,
- pp->io_bus_addr, pp->io_size);
-
- return ret;
-}
-
-static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus,
- int dev)
-{
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
- /* If there is no link, then there is no device */
- if (bus->number != pp->root_bus_nr) {
- if (!dw_pcie_link_up(pci))
- return 0;
- }
-
- /* access only one slot on each root port */
- if (bus->number == pp->root_bus_nr && dev > 0)
- return 0;
-
- return 1;
-}
-
-static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
- int size, u32 *val)
-{
- struct pcie_port *pp = bus->sysdata;
-
- if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn))) {
- *val = 0xffffffff;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
- if (bus->number == pp->root_bus_nr)
- return dw_pcie_rd_own_conf(pp, where, size, val);
-
- return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
-}
-
-static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
- int where, int size, u32 val)
-{
- struct pcie_port *pp = bus->sysdata;
-
- if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn)))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (bus->number == pp->root_bus_nr)
- return dw_pcie_wr_own_conf(pp, where, size, val);
-
- return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
-}
-
-static struct pci_ops dw_pcie_ops = {
- .read = dw_pcie_rd_conf,
- .write = dw_pcie_wr_conf,
-};
-
-void dw_pcie_setup_rc(struct pcie_port *pp)
+void dw_pcie_setup(struct dw_pcie *pci)
{
int ret;
- u32 lanes;
u32 val;
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ u32 lanes;
struct device *dev = pci->dev;
struct device_node *np = dev->of_node;
@@ -803,51 +249,4 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
break;
}
dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
-
- /* setup RC BARs */
- dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004);
- dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000);
-
- /* setup interrupt pins */
- val = dw_pcie_readl_dbi(pci, PCI_INTERRUPT_LINE);
- val &= 0xffff00ff;
- val |= 0x00000100;
- dw_pcie_writel_dbi(pci, PCI_INTERRUPT_LINE, val);
-
- /* setup bus numbers */
- val = dw_pcie_readl_dbi(pci, PCI_PRIMARY_BUS);
- val &= 0xff000000;
- val |= 0x00010100;
- dw_pcie_writel_dbi(pci, PCI_PRIMARY_BUS, val);
-
- /* setup command register */
- val = dw_pcie_readl_dbi(pci, PCI_COMMAND);
- val &= 0xffff0000;
- val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
- PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
- dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
-
- /*
- * If the platform provides ->rd_other_conf, it means the platform
- * uses its own address translation component rather than ATU, so
- * we should not program the ATU here.
- */
- if (!pp->ops->rd_other_conf) {
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX0,
- PCIE_ATU_TYPE_MEM, pp->mem_base,
- pp->mem_bus_addr, pp->mem_size);
- if (pci->num_viewport > 2)
- dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX2,
- PCIE_ATU_TYPE_IO, pp->io_base,
- pp->io_bus_addr, pp->io_size);
- }
-
- dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
-
- /* program correct class for RC */
- dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
-
- dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
- val |= PORT_LOGIC_SPEED_CHANGE;
- dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
}
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index 491fbe3..808d17b 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -14,6 +14,10 @@
#ifndef _PCIE_DESIGNWARE_H
#define _PCIE_DESIGNWARE_H
+#include <linux/irq.h>
+#include <linux/msi.h>
+#include <linux/pci.h>
+
/* Parameters for the waiting for link up routine */
#define LINK_WAIT_MAX_RETRIES 10
#define LINK_WAIT_USLEEP_MIN 90000
@@ -167,4 +171,8 @@ struct dw_pcie {
void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val);
int dw_pcie_link_up(struct dw_pcie *pci);
int dw_pcie_wait_for_link(struct dw_pcie *pci);
+void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
+ int type, u64 cpu_addr, u64 pci_addr,
+ u32 size);
+void dw_pcie_setup(struct dw_pcie *pci);
#endif /* _PCIE_DESIGNWARE_H */
--
1.7.9.5
^ permalink raw reply related
* [PATCH 10/37] PCI: dwc: designware: Fix style errors in pcie-designware.c
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
No functional change. Fix all checkpatch warnings and check errors
in pcie-designware.c
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/pcie-designware.c | 42 ++++++++++++++++++-------------------
1 file changed, 21 insertions(+), 21 deletions(-)
diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index 89cdb6b..ff04074 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -40,13 +40,13 @@ int dw_pcie_read(void __iomem *addr, int size, u32 *val)
return PCIBIOS_BAD_REGISTER_NUMBER;
}
- if (size == 4)
+ if (size == 4) {
*val = readl(addr);
- else if (size == 2)
+ } else if (size == 2) {
*val = readw(addr);
- else if (size == 1)
+ } else if (size == 1) {
*val = readb(addr);
- else {
+ } else {
*val = 0;
return PCIBIOS_BAD_REGISTER_NUMBER;
}
@@ -203,16 +203,15 @@ irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
for (i = 0; i < MAX_MSI_CTRLS; i++) {
dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4,
- (u32 *)&val);
+ (u32 *)&val);
if (val) {
ret = IRQ_HANDLED;
pos = 0;
while ((pos = find_next_bit(&val, 32, pos)) != 32) {
irq = irq_find_mapping(pp->irq_domain,
- i * 32 + pos);
- dw_pcie_wr_own_conf(pp,
- PCIE_MSI_INTR0_STATUS + i * 12,
- 4, 1 << pos);
+ i * 32 + pos);
+ dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS +
+ i * 12, 4, 1 << pos);
generic_handle_irq(irq);
pos++;
}
@@ -278,8 +277,9 @@ static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
{
int irq, pos0, i;
- struct pcie_port *pp = (struct pcie_port *) msi_desc_to_pci_sysdata(desc);
+ struct pcie_port *pp;
+ pp = (struct pcie_port *)msi_desc_to_pci_sysdata(desc);
pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
order_base_2(no_irqs));
if (pos0 < 0)
@@ -341,7 +341,7 @@ static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos)
}
static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
- struct msi_desc *desc)
+ struct msi_desc *desc)
{
int irq, pos;
struct pcie_port *pp = pdev->bus->sysdata;
@@ -389,7 +389,7 @@ static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
{
struct irq_data *data = irq_get_irq_data(irq);
struct msi_desc *msi = irq_data_get_msi_desc(data);
- struct pcie_port *pp = (struct pcie_port *) msi_desc_to_pci_sysdata(msi);
+ struct pcie_port *pp = (struct pcie_port *)msi_desc_to_pci_sysdata(msi);
clear_irq_range(pp, irq, 1, data->hwirq);
}
@@ -431,7 +431,7 @@ int dw_pcie_link_up(struct dw_pcie *pci)
}
static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
- irq_hw_number_t hwirq)
+ irq_hw_number_t hwirq)
{
irq_set_chip_and_handler(irq, &dw_msi_irq_chip, handle_simple_irq);
irq_set_chip_data(irq, domain->host_data);
@@ -468,8 +468,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
if (cfg_res) {
- pp->cfg0_size = resource_size(cfg_res)/2;
- pp->cfg1_size = resource_size(cfg_res)/2;
+ pp->cfg0_size = resource_size(cfg_res) / 2;
+ pp->cfg1_size = resource_size(cfg_res) / 2;
pp->cfg0_base = cfg_res->start;
pp->cfg1_base = cfg_res->start + pp->cfg0_size;
} else if (!pp->va_cfg0_base) {
@@ -508,8 +508,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
break;
case 0:
pp->cfg = win->res;
- pp->cfg0_size = resource_size(pp->cfg)/2;
- pp->cfg1_size = resource_size(pp->cfg)/2;
+ pp->cfg0_size = resource_size(pp->cfg) / 2;
+ pp->cfg1_size = resource_size(pp->cfg) / 2;
pp->cfg0_base = pp->cfg->start;
pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
break;
@@ -615,7 +615,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
}
static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 *val)
+ u32 devfn, int where, int size, u32 *val)
{
int ret, type;
u32 busdev, cfg_size;
@@ -654,7 +654,7 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
}
static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
- u32 devfn, int where, int size, u32 val)
+ u32 devfn, int where, int size, u32 val)
{
int ret, type;
u32 busdev, cfg_size;
@@ -711,7 +711,7 @@ static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus,
}
static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
- int size, u32 *val)
+ int size, u32 *val)
{
struct pcie_port *pp = bus->sysdata;
@@ -727,7 +727,7 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
}
static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
- int where, int size, u32 val)
+ int where, int size, u32 val)
{
struct pcie_port *pp = bus->sysdata;
--
1.7.9.5
^ permalink raw reply related
* [PATCH 09/37] PCI: dwc: designware: Parse *num-lanes* property in dw_pcie_setup_rc
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
*num-lanes* dt property is parsed in dw_pcie_host_init. However
*num-lanes* property is applicable to both root complex mode and
endpoint mode. As a first step, move the parsing of this property
outside dw_pcie_host_init. This is in preparation for splitting
pcie-designware.c to pcie-designware.c and pcie-designware-host.c
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/pcie-designware.c | 18 +++++++++++-------
drivers/pci/dwc/pcie-designware.h | 1 -
2 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index 00a0fdc..89cdb6b 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -551,10 +551,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
}
}
- ret = of_property_read_u32(np, "num-lanes", &pci->lanes);
- if (ret)
- pci->lanes = 0;
-
ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport);
if (ret)
pci->num_viewport = 2;
@@ -751,18 +747,26 @@ static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
void dw_pcie_setup_rc(struct pcie_port *pp)
{
+ int ret;
+ u32 lanes;
u32 val;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct device *dev = pci->dev;
+ struct device_node *np = dev->of_node;
/* get iATU unroll support */
pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci);
dev_dbg(pci->dev, "iATU unroll: %s\n",
pci->iatu_unroll_enabled ? "enabled" : "disabled");
+ ret = of_property_read_u32(np, "num-lanes", &lanes);
+ if (ret)
+ lanes = 0;
+
/* set the number of lanes */
val = dw_pcie_readl_dbi(pci, PCIE_PORT_LINK_CONTROL);
val &= ~PORT_LINK_MODE_MASK;
- switch (pci->lanes) {
+ switch (lanes) {
case 1:
val |= PORT_LINK_MODE_1_LANES;
break;
@@ -776,7 +780,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
val |= PORT_LINK_MODE_8_LANES;
break;
default:
- dev_err(pci->dev, "num-lanes %u: invalid value\n", pci->lanes);
+ dev_err(pci->dev, "num-lanes %u: invalid value\n", lanes);
return;
}
dw_pcie_writel_dbi(pci, PCIE_PORT_LINK_CONTROL, val);
@@ -784,7 +788,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
/* set link width speed control register */
val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
val &= ~PORT_LOGIC_LINK_WIDTH_MASK;
- switch (pci->lanes) {
+ switch (lanes) {
case 1:
val |= PORT_LOGIC_LINK_WIDTH_1_LANES;
break;
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index d4b3d43..491fbe3 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -148,7 +148,6 @@ struct dw_pcie_ops {
struct dw_pcie {
struct device *dev;
void __iomem *dbi_base;
- u32 lanes;
u32 num_viewport;
u8 iatu_unroll_enabled;
struct pcie_port pp;
--
1.7.9.5
^ permalink raw reply related
* [RFT PATCH 08/37] PCI: dwc: Split *struct pcie_port* into host only and core structures
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
Keep only the host specific members in *struct pcie_port* and
move the common members (i.e common to both host and endpoint)
to *struct dw_pcie*. This is in preparation for adding endpoint
mode support to designware driver.
While at that also fix checkpatch warnings.
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Minghuan Lian <minghuan.Lian@freescale.com>
Cc: Mingkai Hu <mingkai.hu@freescale.com>
Cc: Roy Zang <tie-fei.zang@freescale.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Niklas Cassel <niklas.cassel@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Joao Pinto <Joao.Pinto@synopsys.com>
Cc: Zhou Wang <wangzhou1@hisilicon.com>
Cc: Gabriele Paoloni <gabriele.paoloni@huawei.com>
Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
I've pushed the series to
git://git.ti.com/linux-phy/linux-phy.git pci_ep_v1
I have access to only dra7 based boards, so I was able to test only
that. Testing in other plaforms would be highly appreciated.
drivers/pci/dwc/pci-dra7xx.c | 76 +++++++-----
drivers/pci/dwc/pci-exynos.c | 78 +++++++-----
drivers/pci/dwc/pci-imx6.c | 128 ++++++++++----------
drivers/pci/dwc/pci-keystone-dw.c | 83 +++++++------
drivers/pci/dwc/pci-keystone.c | 54 +++++----
drivers/pci/dwc/pci-keystone.h | 4 +-
drivers/pci/dwc/pci-layerscape.c | 91 +++++++++-----
drivers/pci/dwc/pcie-armada8k.c | 85 +++++++------
drivers/pci/dwc/pcie-artpec6.c | 48 ++++----
drivers/pci/dwc/pcie-designware-plat.c | 27 +++--
drivers/pci/dwc/pcie-designware.c | 203 +++++++++++++++++---------------
drivers/pci/dwc/pcie-designware.h | 69 ++++++-----
drivers/pci/dwc/pcie-hisi.c | 55 +++++----
drivers/pci/dwc/pcie-qcom.c | 70 +++++++----
drivers/pci/dwc/pcie-spear13xx.c | 74 +++++++-----
15 files changed, 665 insertions(+), 480 deletions(-)
diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c
index 38b0c9a..3c525b0 100644
--- a/drivers/pci/dwc/pci-dra7xx.c
+++ b/drivers/pci/dwc/pci-dra7xx.c
@@ -67,7 +67,7 @@
#define EXP_CAP_ID_OFFSET 0x70
struct dra7xx_pcie {
- struct pcie_port pp;
+ struct dw_pcie *pci;
void __iomem *base; /* DT ti_conf */
int phy_count; /* DT phy-names count */
struct phy **phy;
@@ -75,7 +75,7 @@ struct dra7xx_pcie {
struct irq_domain *irq_domain;
};
-#define to_dra7xx_pcie(x) container_of((x), struct dra7xx_pcie, pp)
+#define to_dra7xx_pcie(x) dev_get_drvdata((x)->dev)
static inline u32 dra7xx_pcie_readl(struct dra7xx_pcie *pcie, u32 offset)
{
@@ -93,9 +93,9 @@ static u64 dra7xx_pcie_cpu_addr_fixup(u64 pci_addr)
return pci_addr & DRA7XX_CPU_TO_BUS_ADDR;
}
-static int dra7xx_pcie_link_up(struct pcie_port *pp)
+static int dra7xx_pcie_link_up(struct dw_pcie *pci)
{
- struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pp);
+ struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
u32 reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_PHY_CS);
return !!(reg & LINK_UP);
@@ -103,32 +103,32 @@ static int dra7xx_pcie_link_up(struct pcie_port *pp)
static int dra7xx_pcie_establish_link(struct dra7xx_pcie *dra7xx)
{
- struct pcie_port *pp = &dra7xx->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = dra7xx->pci;
+ struct device *dev = pci->dev;
u32 reg;
u32 exp_cap_off = EXP_CAP_ID_OFFSET;
- if (dw_pcie_link_up(pp)) {
+ if (dw_pcie_link_up(pci)) {
dev_err(dev, "link is already up\n");
return 0;
}
if (dra7xx->link_gen == 1) {
- dw_pcie_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
+ dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
4, ®);
if ((reg & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
reg &= ~((u32)PCI_EXP_LNKCAP_SLS);
reg |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pp->dbi_base + exp_cap_off +
+ dw_pcie_write(pci->dbi_base + exp_cap_off +
PCI_EXP_LNKCAP, 4, reg);
}
- dw_pcie_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
+ dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
2, ®);
if ((reg & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
reg &= ~((u32)PCI_EXP_LNKCAP_SLS);
reg |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pp->dbi_base + exp_cap_off +
+ dw_pcie_write(pci->dbi_base + exp_cap_off +
PCI_EXP_LNKCTL2, 2, reg);
}
}
@@ -137,7 +137,7 @@ static int dra7xx_pcie_establish_link(struct dra7xx_pcie *dra7xx)
reg |= LTSSM_EN;
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_DEVICE_CMD, reg);
- return dw_pcie_wait_for_link(pp);
+ return dw_pcie_wait_for_link(pci);
}
static void dra7xx_pcie_enable_interrupts(struct dra7xx_pcie *dra7xx)
@@ -154,7 +154,8 @@ static void dra7xx_pcie_enable_interrupts(struct dra7xx_pcie *dra7xx)
static void dra7xx_pcie_host_init(struct pcie_port *pp)
{
- struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
dw_pcie_setup_rc(pp);
@@ -163,9 +164,7 @@ static void dra7xx_pcie_host_init(struct pcie_port *pp)
dra7xx_pcie_enable_interrupts(dra7xx);
}
-static struct pcie_host_ops dra7xx_pcie_host_ops = {
- .cpu_addr_fixup = dra7xx_pcie_cpu_addr_fixup,
- .link_up = dra7xx_pcie_link_up,
+static struct dw_pcie_host_ops dra7xx_pcie_host_ops = {
.host_init = dra7xx_pcie_host_init,
};
@@ -184,8 +183,9 @@ static int dra7xx_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
static int dra7xx_pcie_init_irq_domain(struct pcie_port *pp)
{
- struct device *dev = pp->dev;
- struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct device *dev = pci->dev;
+ struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
struct device_node *node = dev->of_node;
struct device_node *pcie_intc_node = of_get_next_child(node, NULL);
@@ -207,7 +207,8 @@ static int dra7xx_pcie_init_irq_domain(struct pcie_port *pp)
static irqreturn_t dra7xx_pcie_msi_irq_handler(int irq, void *arg)
{
struct dra7xx_pcie *dra7xx = arg;
- struct pcie_port *pp = &dra7xx->pp;
+ struct dw_pcie *pci = dra7xx->pci;
+ struct pcie_port *pp = &pci->pp;
u32 reg;
reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_IRQSTATUS_MSI);
@@ -234,7 +235,8 @@ static irqreturn_t dra7xx_pcie_msi_irq_handler(int irq, void *arg)
static irqreturn_t dra7xx_pcie_irq_handler(int irq, void *arg)
{
struct dra7xx_pcie *dra7xx = arg;
- struct device *dev = dra7xx->pp.dev;
+ struct dw_pcie *pci = dra7xx->pci;
+ struct device *dev = pci->dev;
u32 reg;
reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_IRQSTATUS_MAIN);
@@ -292,9 +294,9 @@ static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
struct pcie_port *pp;
struct resource *res;
struct device *dev = &pdev->dev;
+ struct dw_pcie *pci = dra7xx->pci;
- pp = &dra7xx->pp;
- pp->dev = dev;
+ pp = &pci->pp;
pp->ops = &dra7xx_pcie_host_ops;
pp->irq = platform_get_irq(pdev, 1);
@@ -316,8 +318,8 @@ static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
return ret;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rc_dbics");
- pp->dbi_base = devm_ioremap(dev, res->start, resource_size(res));
- if (!pp->dbi_base)
+ pci->dbi_base = devm_ioremap(dev, res->start, resource_size(res));
+ if (!pci->dbi_base)
return -ENOMEM;
ret = dw_pcie_host_init(pp);
@@ -329,6 +331,11 @@ static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
return 0;
}
+static const struct dw_pcie_ops dw_pcie_ops = {
+ .cpu_addr_fixup = dra7xx_pcie_cpu_addr_fixup,
+ .link_up = dra7xx_pcie_link_up,
+};
+
static void dra7xx_pcie_disable_phy(struct dra7xx_pcie *dra7xx)
{
int phy_count = dra7xx->phy_count;
@@ -378,6 +385,7 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
struct phy **phy;
void __iomem *base;
struct resource *res;
+ struct dw_pcie *pci;
struct dra7xx_pcie *dra7xx;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
@@ -388,6 +396,13 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
if (!dra7xx)
return -ENOMEM;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
+ pci->ops = &dw_pcie_ops;
+
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "missing IRQ resource\n");
@@ -425,6 +440,7 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
dra7xx->base = base;
dra7xx->phy = phy;
+ dra7xx->pci = pci;
dra7xx->phy_count = phy_count;
ret = dra7xx_pcie_enable_phy(dra7xx);
@@ -477,13 +493,13 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
static int dra7xx_pcie_suspend(struct device *dev)
{
struct dra7xx_pcie *dra7xx = dev_get_drvdata(dev);
- struct pcie_port *pp = &dra7xx->pp;
+ struct dw_pcie *pci = dra7xx->pci;
u32 val;
/* clear MSE */
- val = dw_pcie_readl_rc(pp, PCI_COMMAND);
+ val = dw_pcie_readl_dbi(pci, PCI_COMMAND);
val &= ~PCI_COMMAND_MEMORY;
- dw_pcie_writel_rc(pp, PCI_COMMAND, val);
+ dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
return 0;
}
@@ -491,13 +507,13 @@ static int dra7xx_pcie_suspend(struct device *dev)
static int dra7xx_pcie_resume(struct device *dev)
{
struct dra7xx_pcie *dra7xx = dev_get_drvdata(dev);
- struct pcie_port *pp = &dra7xx->pp;
+ struct dw_pcie *pci = dra7xx->pci;
u32 val;
/* set MSE */
- val = dw_pcie_readl_rc(pp, PCI_COMMAND);
+ val = dw_pcie_readl_dbi(pci, PCI_COMMAND);
val |= PCI_COMMAND_MEMORY;
- dw_pcie_writel_rc(pp, PCI_COMMAND, val);
+ dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
return 0;
}
diff --git a/drivers/pci/dwc/pci-exynos.c b/drivers/pci/dwc/pci-exynos.c
index e3fbff4..0295ec9 100644
--- a/drivers/pci/dwc/pci-exynos.c
+++ b/drivers/pci/dwc/pci-exynos.c
@@ -26,10 +26,10 @@
#include "pcie-designware.h"
-#define to_exynos_pcie(x) container_of(x, struct exynos_pcie, pp)
+#define to_exynos_pcie(x) dev_get_drvdata((x)->dev)
struct exynos_pcie {
- struct pcie_port pp;
+ struct dw_pcie *pci;
void __iomem *elbi_base; /* DT 0th resource */
void __iomem *phy_base; /* DT 1st resource */
void __iomem *block_base; /* DT 2nd resource */
@@ -297,8 +297,8 @@ static void exynos_pcie_init_phy(struct exynos_pcie *exynos_pcie)
static void exynos_pcie_assert_reset(struct exynos_pcie *exynos_pcie)
{
- struct pcie_port *pp = &exynos_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = exynos_pcie->pci;
+ struct device *dev = pci->dev;
if (exynos_pcie->reset_gpio >= 0)
devm_gpio_request_one(dev, exynos_pcie->reset_gpio,
@@ -307,11 +307,12 @@ static void exynos_pcie_assert_reset(struct exynos_pcie *exynos_pcie)
static int exynos_pcie_establish_link(struct exynos_pcie *exynos_pcie)
{
- struct pcie_port *pp = &exynos_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = exynos_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = pci->dev;
u32 val;
- if (dw_pcie_link_up(pp)) {
+ if (dw_pcie_link_up(pci)) {
dev_err(dev, "Link already up\n");
return 0;
}
@@ -336,7 +337,7 @@ static int exynos_pcie_establish_link(struct exynos_pcie *exynos_pcie)
PCIE_APP_LTSSM_ENABLE);
/* check if the link is up or not */
- if (!dw_pcie_wait_for_link(pp))
+ if (!dw_pcie_wait_for_link(pci))
return 0;
while (exynos_phy_readl(exynos_pcie, PCIE_PHY_PLL_LOCKED) == 0) {
@@ -376,14 +377,16 @@ static irqreturn_t exynos_pcie_irq_handler(int irq, void *arg)
static irqreturn_t exynos_pcie_msi_irq_handler(int irq, void *arg)
{
struct exynos_pcie *exynos_pcie = arg;
- struct pcie_port *pp = &exynos_pcie->pp;
+ struct dw_pcie *pci = exynos_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
return dw_handle_msi_irq(pp);
}
static void exynos_pcie_msi_init(struct exynos_pcie *exynos_pcie)
{
- struct pcie_port *pp = &exynos_pcie->pp;
+ struct dw_pcie *pci = exynos_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
u32 val;
dw_pcie_msi_init(pp);
@@ -402,34 +405,35 @@ static void exynos_pcie_enable_interrupts(struct exynos_pcie *exynos_pcie)
exynos_pcie_msi_init(exynos_pcie);
}
-static u32 exynos_pcie_readl_rc(struct pcie_port *pp, u32 reg)
+static u32 exynos_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
{
- struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pci);
u32 val;
exynos_pcie_sideband_dbi_r_mode(exynos_pcie, true);
- val = readl(pp->dbi_base + reg);
+ val = readl(pci->dbi_base + reg);
exynos_pcie_sideband_dbi_r_mode(exynos_pcie, false);
return val;
}
-static void exynos_pcie_writel_rc(struct pcie_port *pp, u32 reg, u32 val)
+static void exynos_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
{
- struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pci);
exynos_pcie_sideband_dbi_w_mode(exynos_pcie, true);
- writel(val, pp->dbi_base + reg);
+ writel(val, pci->dbi_base + reg);
exynos_pcie_sideband_dbi_w_mode(exynos_pcie, false);
}
static int exynos_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
u32 *val)
{
- struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pci);
int ret;
exynos_pcie_sideband_dbi_r_mode(exynos_pcie, true);
- ret = dw_pcie_read(pp->dbi_base + where, size, val);
+ ret = dw_pcie_read(pci->dbi_base + where, size, val);
exynos_pcie_sideband_dbi_r_mode(exynos_pcie, false);
return ret;
}
@@ -437,18 +441,19 @@ static int exynos_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
static int exynos_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
u32 val)
{
- struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pci);
int ret;
exynos_pcie_sideband_dbi_w_mode(exynos_pcie, true);
- ret = dw_pcie_write(pp->dbi_base + where, size, val);
+ ret = dw_pcie_write(pci->dbi_base + where, size, val);
exynos_pcie_sideband_dbi_w_mode(exynos_pcie, false);
return ret;
}
-static int exynos_pcie_link_up(struct pcie_port *pp)
+static int exynos_pcie_link_up(struct dw_pcie *pci)
{
- struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pci);
u32 val;
val = exynos_elb_readl(exynos_pcie, PCIE_ELBI_RDLH_LINKUP);
@@ -460,26 +465,25 @@ static int exynos_pcie_link_up(struct pcie_port *pp)
static void exynos_pcie_host_init(struct pcie_port *pp)
{
- struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pci);
exynos_pcie_establish_link(exynos_pcie);
exynos_pcie_enable_interrupts(exynos_pcie);
}
-static struct pcie_host_ops exynos_pcie_host_ops = {
- .readl_rc = exynos_pcie_readl_rc,
- .writel_rc = exynos_pcie_writel_rc,
+static struct dw_pcie_host_ops exynos_pcie_host_ops = {
.rd_own_conf = exynos_pcie_rd_own_conf,
.wr_own_conf = exynos_pcie_wr_own_conf,
- .link_up = exynos_pcie_link_up,
.host_init = exynos_pcie_host_init,
};
static int __init exynos_add_pcie_port(struct exynos_pcie *exynos_pcie,
struct platform_device *pdev)
{
- struct pcie_port *pp = &exynos_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = exynos_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = &pdev->dev;
int ret;
pp->irq = platform_get_irq(pdev, 1);
@@ -523,11 +527,17 @@ static int __init exynos_add_pcie_port(struct exynos_pcie *exynos_pcie,
return 0;
}
+static const struct dw_pcie_ops dw_pcie_ops = {
+ .readl_dbi = exynos_pcie_readl_dbi,
+ .writel_dbi = exynos_pcie_writel_dbi,
+ .link_up = exynos_pcie_link_up,
+};
+
static int __init exynos_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ struct dw_pcie *pci;
struct exynos_pcie *exynos_pcie;
- struct pcie_port *pp;
struct device_node *np = dev->of_node;
struct resource *elbi_base;
struct resource *phy_base;
@@ -538,8 +548,12 @@ static int __init exynos_pcie_probe(struct platform_device *pdev)
if (!exynos_pcie)
return -ENOMEM;
- pp = &exynos_pcie->pp;
- pp->dev = dev;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
+ pci->ops = &dw_pcie_ops;
exynos_pcie->reset_gpio = of_get_named_gpio(np, "reset-gpio", 0);
diff --git a/drivers/pci/dwc/pci-imx6.c b/drivers/pci/dwc/pci-imx6.c
index 6e5d06f..70fa380 100644
--- a/drivers/pci/dwc/pci-imx6.c
+++ b/drivers/pci/dwc/pci-imx6.c
@@ -30,7 +30,7 @@
#include "pcie-designware.h"
-#define to_imx6_pcie(x) container_of(x, struct imx6_pcie, pp)
+#define to_imx6_pcie(x) dev_get_drvdata((x)->dev)
enum imx6_pcie_variants {
IMX6Q,
@@ -39,7 +39,7 @@ enum imx6_pcie_variants {
};
struct imx6_pcie {
- struct pcie_port pp; /* pp.dbi_base is DT 0th resource */
+ struct dw_pcie *pci;
int reset_gpio;
bool gpio_active_high;
struct clk *pcie_bus;
@@ -97,13 +97,13 @@ struct imx6_pcie {
static int pcie_phy_poll_ack(struct imx6_pcie *imx6_pcie, int exp_val)
{
- struct pcie_port *pp = &imx6_pcie->pp;
+ struct dw_pcie *pci = imx6_pcie->pci;
u32 val;
u32 max_iterations = 10;
u32 wait_counter = 0;
do {
- val = dw_pcie_readl_rc(pp, PCIE_PHY_STAT);
+ val = dw_pcie_readl_dbi(pci, PCIE_PHY_STAT);
val = (val >> PCIE_PHY_STAT_ACK_LOC) & 0x1;
wait_counter++;
@@ -118,22 +118,22 @@ static int pcie_phy_poll_ack(struct imx6_pcie *imx6_pcie, int exp_val)
static int pcie_phy_wait_ack(struct imx6_pcie *imx6_pcie, int addr)
{
- struct pcie_port *pp = &imx6_pcie->pp;
+ struct dw_pcie *pci = imx6_pcie->pci;
u32 val;
int ret;
val = addr << PCIE_PHY_CTRL_DATA_LOC;
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, val);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, val);
val |= (0x1 << PCIE_PHY_CTRL_CAP_ADR_LOC);
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, val);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, val);
ret = pcie_phy_poll_ack(imx6_pcie, 1);
if (ret)
return ret;
val = addr << PCIE_PHY_CTRL_DATA_LOC;
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, val);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, val);
return pcie_phy_poll_ack(imx6_pcie, 0);
}
@@ -141,7 +141,7 @@ static int pcie_phy_wait_ack(struct imx6_pcie *imx6_pcie, int addr)
/* Read from the 16-bit PCIe PHY control registers (not memory-mapped) */
static int pcie_phy_read(struct imx6_pcie *imx6_pcie, int addr, int *data)
{
- struct pcie_port *pp = &imx6_pcie->pp;
+ struct dw_pcie *pci = imx6_pcie->pci;
u32 val, phy_ctl;
int ret;
@@ -151,24 +151,24 @@ static int pcie_phy_read(struct imx6_pcie *imx6_pcie, int addr, int *data)
/* assert Read signal */
phy_ctl = 0x1 << PCIE_PHY_CTRL_RD_LOC;
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, phy_ctl);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, phy_ctl);
ret = pcie_phy_poll_ack(imx6_pcie, 1);
if (ret)
return ret;
- val = dw_pcie_readl_rc(pp, PCIE_PHY_STAT);
+ val = dw_pcie_readl_dbi(pci, PCIE_PHY_STAT);
*data = val & 0xffff;
/* deassert Read signal */
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, 0x00);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, 0x00);
return pcie_phy_poll_ack(imx6_pcie, 0);
}
static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data)
{
- struct pcie_port *pp = &imx6_pcie->pp;
+ struct dw_pcie *pci = imx6_pcie->pci;
u32 var;
int ret;
@@ -179,11 +179,11 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data)
return ret;
var = data << PCIE_PHY_CTRL_DATA_LOC;
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, var);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, var);
/* capture data */
var |= (0x1 << PCIE_PHY_CTRL_CAP_DAT_LOC);
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, var);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, var);
ret = pcie_phy_poll_ack(imx6_pcie, 1);
if (ret)
@@ -191,7 +191,7 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data)
/* deassert cap data */
var = data << PCIE_PHY_CTRL_DATA_LOC;
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, var);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, var);
/* wait for ack de-assertion */
ret = pcie_phy_poll_ack(imx6_pcie, 0);
@@ -200,7 +200,7 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data)
/* assert wr signal */
var = 0x1 << PCIE_PHY_CTRL_WR_LOC;
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, var);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, var);
/* wait for ack */
ret = pcie_phy_poll_ack(imx6_pcie, 1);
@@ -209,14 +209,14 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data)
/* deassert wr signal */
var = data << PCIE_PHY_CTRL_DATA_LOC;
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, var);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, var);
/* wait for ack de-assertion */
ret = pcie_phy_poll_ack(imx6_pcie, 0);
if (ret)
return ret;
- dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, 0x0);
+ dw_pcie_writel_dbi(pci, PCIE_PHY_CTRL, 0x0);
return 0;
}
@@ -247,7 +247,7 @@ static int imx6q_pcie_abort_handler(unsigned long addr,
static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
{
- struct pcie_port *pp = &imx6_pcie->pp;
+ struct dw_pcie *pci = imx6_pcie->pci;
u32 val, gpr1, gpr12;
switch (imx6_pcie->variant) {
@@ -284,10 +284,10 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
if ((gpr1 & IMX6Q_GPR1_PCIE_REF_CLK_EN) &&
(gpr12 & IMX6Q_GPR12_PCIE_CTL_2)) {
- val = dw_pcie_readl_rc(pp, PCIE_PL_PFLR);
+ val = dw_pcie_readl_dbi(pci, PCIE_PL_PFLR);
val &= ~PCIE_PL_PFLR_LINK_STATE_MASK;
val |= PCIE_PL_PFLR_FORCE_LINK;
- dw_pcie_writel_rc(pp, PCIE_PL_PFLR, val);
+ dw_pcie_writel_dbi(pci, PCIE_PL_PFLR, val);
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
IMX6Q_GPR12_PCIE_CTL_2, 0 << 10);
@@ -303,8 +303,8 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
{
- struct pcie_port *pp = &imx6_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = imx6_pcie->pci;
+ struct device *dev = pci->dev;
int ret = 0;
switch (imx6_pcie->variant) {
@@ -340,8 +340,8 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
{
- struct pcie_port *pp = &imx6_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = imx6_pcie->pci;
+ struct device *dev = pci->dev;
int ret;
ret = clk_prepare_enable(imx6_pcie->pcie_phy);
@@ -440,28 +440,28 @@ static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
static int imx6_pcie_wait_for_link(struct imx6_pcie *imx6_pcie)
{
- struct pcie_port *pp = &imx6_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = imx6_pcie->pci;
+ struct device *dev = pci->dev;
/* check if the link is up or not */
- if (!dw_pcie_wait_for_link(pp))
+ if (!dw_pcie_wait_for_link(pci))
return 0;
dev_dbg(dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n",
- dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R0),
- dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R1));
+ dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R0),
+ dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R1));
return -ETIMEDOUT;
}
static int imx6_pcie_wait_for_speed_change(struct imx6_pcie *imx6_pcie)
{
- struct pcie_port *pp = &imx6_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = imx6_pcie->pci;
+ struct device *dev = pci->dev;
u32 tmp;
unsigned int retries;
for (retries = 0; retries < 200; retries++) {
- tmp = dw_pcie_readl_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL);
+ tmp = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
/* Test if the speed change finished. */
if (!(tmp & PORT_LOGIC_SPEED_CHANGE))
return 0;
@@ -475,15 +475,16 @@ static int imx6_pcie_wait_for_speed_change(struct imx6_pcie *imx6_pcie)
static irqreturn_t imx6_pcie_msi_handler(int irq, void *arg)
{
struct imx6_pcie *imx6_pcie = arg;
- struct pcie_port *pp = &imx6_pcie->pp;
+ struct dw_pcie *pci = imx6_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
return dw_handle_msi_irq(pp);
}
static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
{
- struct pcie_port *pp = &imx6_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = imx6_pcie->pci;
+ struct device *dev = pci->dev;
u32 tmp;
int ret;
@@ -492,10 +493,10 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
* started in Gen2 mode, there is a possibility the devices on the
* bus will not be detected at all. This happens with PCIe switches.
*/
- tmp = dw_pcie_readl_rc(pp, PCIE_RC_LCR);
+ tmp = dw_pcie_readl_dbi(pci, PCIE_RC_LCR);
tmp &= ~PCIE_RC_LCR_MAX_LINK_SPEEDS_MASK;
tmp |= PCIE_RC_LCR_MAX_LINK_SPEEDS_GEN1;
- dw_pcie_writel_rc(pp, PCIE_RC_LCR, tmp);
+ dw_pcie_writel_dbi(pci, PCIE_RC_LCR, tmp);
/* Start LTSSM. */
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
@@ -509,10 +510,10 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
if (imx6_pcie->link_gen == 2) {
/* Allow Gen2 mode after the link is up. */
- tmp = dw_pcie_readl_rc(pp, PCIE_RC_LCR);
+ tmp = dw_pcie_readl_dbi(pci, PCIE_RC_LCR);
tmp &= ~PCIE_RC_LCR_MAX_LINK_SPEEDS_MASK;
tmp |= PCIE_RC_LCR_MAX_LINK_SPEEDS_GEN2;
- dw_pcie_writel_rc(pp, PCIE_RC_LCR, tmp);
+ dw_pcie_writel_dbi(pci, PCIE_RC_LCR, tmp);
} else {
dev_info(dev, "Link: Gen2 disabled\n");
}
@@ -521,9 +522,9 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
* Start Directed Speed Change so the best possible speed both link
* partners support can be negotiated.
*/
- tmp = dw_pcie_readl_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL);
+ tmp = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
tmp |= PORT_LOGIC_SPEED_CHANGE;
- dw_pcie_writel_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, tmp);
+ dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, tmp);
ret = imx6_pcie_wait_for_speed_change(imx6_pcie);
if (ret) {
@@ -538,21 +539,22 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
goto err_reset_phy;
}
- tmp = dw_pcie_readl_rc(pp, PCIE_RC_LCSR);
+ tmp = dw_pcie_readl_dbi(pci, PCIE_RC_LCSR);
dev_info(dev, "Link up, Gen%i\n", (tmp >> 16) & 0xf);
return 0;
err_reset_phy:
dev_dbg(dev, "PHY DEBUG_R0=0x%08x DEBUG_R1=0x%08x\n",
- dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R0),
- dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R1));
+ dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R0),
+ dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R1));
imx6_pcie_reset_phy(imx6_pcie);
return ret;
}
static void imx6_pcie_host_init(struct pcie_port *pp)
{
- struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci);
imx6_pcie_assert_core_reset(imx6_pcie);
imx6_pcie_init_phy(imx6_pcie);
@@ -564,22 +566,22 @@ static void imx6_pcie_host_init(struct pcie_port *pp)
dw_pcie_msi_init(pp);
}
-static int imx6_pcie_link_up(struct pcie_port *pp)
+static int imx6_pcie_link_up(struct dw_pcie *pci)
{
- return dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R1) &
+ return dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R1) &
PCIE_PHY_DEBUG_R1_XMLH_LINK_UP;
}
-static struct pcie_host_ops imx6_pcie_host_ops = {
- .link_up = imx6_pcie_link_up,
+static struct dw_pcie_host_ops imx6_pcie_host_ops = {
.host_init = imx6_pcie_host_init,
};
static int __init imx6_add_pcie_port(struct imx6_pcie *imx6_pcie,
struct platform_device *pdev)
{
- struct pcie_port *pp = &imx6_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = imx6_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = &pdev->dev;
int ret;
if (IS_ENABLED(CONFIG_PCI_MSI)) {
@@ -611,11 +613,15 @@ static int __init imx6_add_pcie_port(struct imx6_pcie *imx6_pcie,
return 0;
}
+static const struct dw_pcie_ops dw_pcie_ops = {
+ .link_up = imx6_pcie_link_up,
+};
+
static int __init imx6_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ struct dw_pcie *pci;
struct imx6_pcie *imx6_pcie;
- struct pcie_port *pp;
struct resource *dbi_base;
struct device_node *node = dev->of_node;
int ret;
@@ -624,8 +630,12 @@ static int __init imx6_pcie_probe(struct platform_device *pdev)
if (!imx6_pcie)
return -ENOMEM;
- pp = &imx6_pcie->pp;
- pp->dev = dev;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
+ pci->ops = &dw_pcie_ops;
imx6_pcie->variant =
(enum imx6_pcie_variants)of_device_get_match_data(dev);
@@ -635,9 +645,9 @@ static int __init imx6_pcie_probe(struct platform_device *pdev)
"imprecise external abort");
dbi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- pp->dbi_base = devm_ioremap_resource(dev, dbi_base);
- if (IS_ERR(pp->dbi_base))
- return PTR_ERR(pp->dbi_base);
+ pci->dbi_base = devm_ioremap_resource(dev, dbi_base);
+ if (IS_ERR(pci->dbi_base))
+ return PTR_ERR(pci->dbi_base);
/* Fetch GPIOs */
imx6_pcie->reset_gpio = of_get_named_gpio(node, "reset-gpio", 0);
diff --git a/drivers/pci/dwc/pci-keystone-dw.c b/drivers/pci/dwc/pci-keystone-dw.c
index 4875334..6b396f6 100644
--- a/drivers/pci/dwc/pci-keystone-dw.c
+++ b/drivers/pci/dwc/pci-keystone-dw.c
@@ -72,7 +72,7 @@
/* Config space registers */
#define DEBUG0 0x728
-#define to_keystone_pcie(x) container_of(x, struct keystone_pcie, pp)
+#define to_keystone_pcie(x) dev_get_drvdata((x)->dev)
static inline void update_reg_offset_bit_pos(u32 offset, u32 *reg_offset,
u32 *bit_pos)
@@ -83,7 +83,8 @@ static inline void update_reg_offset_bit_pos(u32 offset, u32 *reg_offset,
phys_addr_t ks_dw_pcie_get_msi_addr(struct pcie_port *pp)
{
- struct keystone_pcie *ks_pcie = to_keystone_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
return ks_pcie->app.start + MSI_IRQ;
}
@@ -100,8 +101,9 @@ static void ks_dw_app_writel(struct keystone_pcie *ks_pcie, u32 offset, u32 val)
void ks_dw_pcie_handle_msi_irq(struct keystone_pcie *ks_pcie, int offset)
{
- struct pcie_port *pp = &ks_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = ks_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = pci->dev;
u32 pending, vector;
int src, virq;
@@ -128,10 +130,12 @@ static void ks_dw_pcie_msi_irq_ack(struct irq_data *d)
struct keystone_pcie *ks_pcie;
struct msi_desc *msi;
struct pcie_port *pp;
+ struct dw_pcie *pci;
msi = irq_data_get_msi_desc(d);
pp = (struct pcie_port *) msi_desc_to_pci_sysdata(msi);
- ks_pcie = to_keystone_pcie(pp);
+ pci = to_dw_pcie_from_pp(pp);
+ ks_pcie = to_keystone_pcie(pci);
offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
update_reg_offset_bit_pos(offset, ®_offset, &bit_pos);
@@ -143,7 +147,8 @@ static void ks_dw_pcie_msi_irq_ack(struct irq_data *d)
void ks_dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
{
u32 reg_offset, bit_pos;
- struct keystone_pcie *ks_pcie = to_keystone_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
update_reg_offset_bit_pos(irq, ®_offset, &bit_pos);
ks_dw_app_writel(ks_pcie, MSI0_IRQ_ENABLE_SET + (reg_offset << 4),
@@ -153,7 +158,8 @@ void ks_dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
void ks_dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
{
u32 reg_offset, bit_pos;
- struct keystone_pcie *ks_pcie = to_keystone_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
update_reg_offset_bit_pos(irq, ®_offset, &bit_pos);
ks_dw_app_writel(ks_pcie, MSI0_IRQ_ENABLE_CLR + (reg_offset << 4),
@@ -165,11 +171,13 @@ static void ks_dw_pcie_msi_irq_mask(struct irq_data *d)
struct keystone_pcie *ks_pcie;
struct msi_desc *msi;
struct pcie_port *pp;
+ struct dw_pcie *pci;
u32 offset;
msi = irq_data_get_msi_desc(d);
pp = (struct pcie_port *) msi_desc_to_pci_sysdata(msi);
- ks_pcie = to_keystone_pcie(pp);
+ pci = to_dw_pcie_from_pp(pp);
+ ks_pcie = to_keystone_pcie(pci);
offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
/* Mask the end point if PVM implemented */
@@ -186,11 +194,13 @@ static void ks_dw_pcie_msi_irq_unmask(struct irq_data *d)
struct keystone_pcie *ks_pcie;
struct msi_desc *msi;
struct pcie_port *pp;
+ struct dw_pcie *pci;
u32 offset;
msi = irq_data_get_msi_desc(d);
pp = (struct pcie_port *) msi_desc_to_pci_sysdata(msi);
- ks_pcie = to_keystone_pcie(pp);
+ pci = to_dw_pcie_from_pp(pp);
+ ks_pcie = to_keystone_pcie(pci);
offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
/* Mask the end point if PVM implemented */
@@ -225,8 +235,9 @@ static int ks_dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
int ks_dw_pcie_msi_host_init(struct pcie_port *pp, struct msi_controller *chip)
{
- struct keystone_pcie *ks_pcie = to_keystone_pcie(pp);
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
+ struct device *dev = pci->dev;
int i;
pp->irq_domain = irq_domain_add_linear(ks_pcie->msi_intc_np,
@@ -254,8 +265,8 @@ void ks_dw_pcie_enable_legacy_irqs(struct keystone_pcie *ks_pcie)
void ks_dw_pcie_handle_legacy_irq(struct keystone_pcie *ks_pcie, int offset)
{
- struct pcie_port *pp = &ks_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = ks_pcie->pci;
+ struct device *dev = pci->dev;
u32 pending;
int virq;
@@ -285,7 +296,7 @@ irqreturn_t ks_dw_pcie_handle_error_irq(struct keystone_pcie *ks_pcie)
return IRQ_NONE;
if (status & ERR_FATAL_IRQ)
- dev_err(ks_pcie->pp.dev, "fatal error (status %#010x)\n",
+ dev_err(ks_pcie->pci->dev, "fatal error (status %#010x)\n",
status);
/* Ack the IRQ; status bits are RW1C */
@@ -366,15 +377,16 @@ static void ks_dw_pcie_clear_dbi_mode(struct keystone_pcie *ks_pcie)
void ks_dw_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie)
{
- struct pcie_port *pp = &ks_pcie->pp;
+ struct dw_pcie *pci = ks_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
u32 start = pp->mem->start, end = pp->mem->end;
int i, tr_size;
u32 val;
/* Disable BARs for inbound access */
ks_dw_pcie_set_dbi_mode(ks_pcie);
- dw_pcie_writel_rc(pp, PCI_BASE_ADDRESS_0, 0);
- dw_pcie_writel_rc(pp, PCI_BASE_ADDRESS_1, 0);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0);
ks_dw_pcie_clear_dbi_mode(ks_pcie);
/* Set outbound translation size per window division */
@@ -415,11 +427,12 @@ static void __iomem *ks_pcie_cfg_setup(struct keystone_pcie *ks_pcie, u8 bus,
unsigned int devfn)
{
u8 device = PCI_SLOT(devfn), function = PCI_FUNC(devfn);
- struct pcie_port *pp = &ks_pcie->pp;
+ struct dw_pcie *pci = ks_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
u32 regval;
if (bus == 0)
- return pp->dbi_base;
+ return pci->dbi_base;
regval = (bus << 16) | (device << 8) | function;
@@ -438,7 +451,8 @@ static void __iomem *ks_pcie_cfg_setup(struct keystone_pcie *ks_pcie, u8 bus,
int ks_dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
unsigned int devfn, int where, int size, u32 *val)
{
- struct keystone_pcie *ks_pcie = to_keystone_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
u8 bus_num = bus->number;
void __iomem *addr;
@@ -450,7 +464,8 @@ int ks_dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
int ks_dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
unsigned int devfn, int where, int size, u32 val)
{
- struct keystone_pcie *ks_pcie = to_keystone_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
u8 bus_num = bus->number;
void __iomem *addr;
@@ -466,14 +481,15 @@ int ks_dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
*/
void ks_dw_pcie_v3_65_scan_bus(struct pcie_port *pp)
{
- struct keystone_pcie *ks_pcie = to_keystone_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
/* Configure and set up BAR0 */
ks_dw_pcie_set_dbi_mode(ks_pcie);
/* Enable BAR0 */
- dw_pcie_writel_rc(pp, PCI_BASE_ADDRESS_0, 1);
- dw_pcie_writel_rc(pp, PCI_BASE_ADDRESS_0, SZ_4K - 1);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 1);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, SZ_4K - 1);
ks_dw_pcie_clear_dbi_mode(ks_pcie);
@@ -481,17 +497,17 @@ void ks_dw_pcie_v3_65_scan_bus(struct pcie_port *pp)
* For BAR0, just setting bus address for inbound writes (MSI) should
* be sufficient. Use physical address to avoid any conflicts.
*/
- dw_pcie_writel_rc(pp, PCI_BASE_ADDRESS_0, ks_pcie->app.start);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, ks_pcie->app.start);
}
/**
* ks_dw_pcie_link_up() - Check if link up
*/
-int ks_dw_pcie_link_up(struct pcie_port *pp)
+int ks_dw_pcie_link_up(struct dw_pcie *pci)
{
u32 val;
- val = dw_pcie_readl_rc(pp, DEBUG0);
+ val = dw_pcie_readl_dbi(pci, DEBUG0);
return (val & LTSSM_STATE_MASK) == LTSSM_STATE_L0;
}
@@ -519,22 +535,23 @@ void ks_dw_pcie_initiate_link_train(struct keystone_pcie *ks_pcie)
int __init ks_dw_pcie_host_init(struct keystone_pcie *ks_pcie,
struct device_node *msi_intc_np)
{
- struct pcie_port *pp = &ks_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = ks_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = pci->dev;
struct platform_device *pdev = to_platform_device(dev);
struct resource *res;
/* Index 0 is the config reg. space address */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- pp->dbi_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(pp->dbi_base))
- return PTR_ERR(pp->dbi_base);
+ pci->dbi_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(pci->dbi_base))
+ return PTR_ERR(pci->dbi_base);
/*
* We set these same and is used in pcie rd/wr_other_conf
* functions
*/
- pp->va_cfg0_base = pp->dbi_base + SPACE0_REMOTE_CFG_OFFSET;
+ pp->va_cfg0_base = pci->dbi_base + SPACE0_REMOTE_CFG_OFFSET;
pp->va_cfg1_base = pp->va_cfg0_base;
/* Index 1 is the application reg. space address */
diff --git a/drivers/pci/dwc/pci-keystone.c b/drivers/pci/dwc/pci-keystone.c
index 4c7ba35..8dc6640 100644
--- a/drivers/pci/dwc/pci-keystone.c
+++ b/drivers/pci/dwc/pci-keystone.c
@@ -44,7 +44,7 @@
#define PCIE_RC_K2E 0xb009
#define PCIE_RC_K2L 0xb00a
-#define to_keystone_pcie(x) container_of(x, struct keystone_pcie, pp)
+#define to_keystone_pcie(x) dev_get_drvdata((x)->dev)
static void quirk_limit_mrrs(struct pci_dev *dev)
{
@@ -88,13 +88,14 @@ static void quirk_limit_mrrs(struct pci_dev *dev)
static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie)
{
- struct pcie_port *pp = &ks_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = ks_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = pci->dev;
unsigned int retries;
dw_pcie_setup_rc(pp);
- if (dw_pcie_link_up(pp)) {
+ if (dw_pcie_link_up(pci)) {
dev_err(dev, "Link already up\n");
return 0;
}
@@ -102,7 +103,7 @@ static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie)
/* check if the link is up or not */
for (retries = 0; retries < 5; retries++) {
ks_dw_pcie_initiate_link_train(ks_pcie);
- if (!dw_pcie_wait_for_link(pp))
+ if (!dw_pcie_wait_for_link(pci))
return 0;
}
@@ -115,8 +116,8 @@ static void ks_pcie_msi_irq_handler(struct irq_desc *desc)
unsigned int irq = irq_desc_get_irq(desc);
struct keystone_pcie *ks_pcie = irq_desc_get_handler_data(desc);
u32 offset = irq - ks_pcie->msi_host_irqs[0];
- struct pcie_port *pp = &ks_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = ks_pcie->pci;
+ struct device *dev = pci->dev;
struct irq_chip *chip = irq_desc_get_chip(desc);
dev_dbg(dev, "%s, irq %d\n", __func__, irq);
@@ -143,8 +144,8 @@ static void ks_pcie_legacy_irq_handler(struct irq_desc *desc)
{
unsigned int irq = irq_desc_get_irq(desc);
struct keystone_pcie *ks_pcie = irq_desc_get_handler_data(desc);
- struct pcie_port *pp = &ks_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = ks_pcie->pci;
+ struct device *dev = pci->dev;
u32 irq_offset = irq - ks_pcie->legacy_host_irqs[0];
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -164,7 +165,7 @@ static int ks_pcie_get_irq_controller_info(struct keystone_pcie *ks_pcie,
char *controller, int *num_irqs)
{
int temp, max_host_irqs, legacy = 1, *host_irqs;
- struct device *dev = ks_pcie->pp.dev;
+ struct device *dev = ks_pcie->pci->dev;
struct device_node *np_pcie = dev->of_node, **np_temp;
if (!strcmp(controller, "msi-interrupt-controller"))
@@ -262,24 +263,25 @@ static int keystone_pcie_fault(unsigned long addr, unsigned int fsr,
static void __init ks_pcie_host_init(struct pcie_port *pp)
{
- struct keystone_pcie *ks_pcie = to_keystone_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
u32 val;
ks_pcie_establish_link(ks_pcie);
ks_dw_pcie_setup_rc_app_regs(ks_pcie);
ks_pcie_setup_interrupts(ks_pcie);
writew(PCI_IO_RANGE_TYPE_32 | (PCI_IO_RANGE_TYPE_32 << 8),
- pp->dbi_base + PCI_IO_BASE);
+ pci->dbi_base + PCI_IO_BASE);
/* update the Vendor ID */
- writew(ks_pcie->device_id, pp->dbi_base + PCI_DEVICE_ID);
+ writew(ks_pcie->device_id, pci->dbi_base + PCI_DEVICE_ID);
/* update the DEV_STAT_CTRL to publish right mrrs */
- val = readl(pp->dbi_base + PCIE_CAP_BASE + PCI_EXP_DEVCTL);
+ val = readl(pci->dbi_base + PCIE_CAP_BASE + PCI_EXP_DEVCTL);
val &= ~PCI_EXP_DEVCTL_READRQ;
/* set the mrrs to 256 bytes */
val |= BIT(12);
- writel(val, pp->dbi_base + PCIE_CAP_BASE + PCI_EXP_DEVCTL);
+ writel(val, pci->dbi_base + PCIE_CAP_BASE + PCI_EXP_DEVCTL);
/*
* PCIe access errors that result into OCP errors are caught by ARM as
@@ -289,10 +291,9 @@ static void __init ks_pcie_host_init(struct pcie_port *pp)
"Asynchronous external abort");
}
-static struct pcie_host_ops keystone_pcie_host_ops = {
+static struct dw_pcie_host_ops keystone_pcie_host_ops = {
.rd_other_conf = ks_dw_pcie_rd_other_conf,
.wr_other_conf = ks_dw_pcie_wr_other_conf,
- .link_up = ks_dw_pcie_link_up,
.host_init = ks_pcie_host_init,
.msi_set_irq = ks_dw_pcie_msi_set_irq,
.msi_clear_irq = ks_dw_pcie_msi_clear_irq,
@@ -311,8 +312,9 @@ static irqreturn_t pcie_err_irq_handler(int irq, void *priv)
static int __init ks_add_pcie_port(struct keystone_pcie *ks_pcie,
struct platform_device *pdev)
{
- struct pcie_port *pp = &ks_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = ks_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = &pdev->dev;
int ret;
ret = ks_pcie_get_irq_controller_info(ks_pcie,
@@ -365,6 +367,10 @@ static int __init ks_add_pcie_port(struct keystone_pcie *ks_pcie,
{ },
};
+static const struct dw_pcie_ops dw_pcie_ops = {
+ .link_up = ks_dw_pcie_link_up,
+};
+
static int __exit ks_pcie_remove(struct platform_device *pdev)
{
struct keystone_pcie *ks_pcie = platform_get_drvdata(pdev);
@@ -377,8 +383,8 @@ static int __exit ks_pcie_remove(struct platform_device *pdev)
static int __init ks_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ struct dw_pcie *pci;
struct keystone_pcie *ks_pcie;
- struct pcie_port *pp;
struct resource *res;
void __iomem *reg_p;
struct phy *phy;
@@ -388,8 +394,12 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
if (!ks_pcie)
return -ENOMEM;
- pp = &ks_pcie->pp;
- pp->dev = dev;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
+ pci->ops = &dw_pcie_ops;
/* initialize SerDes Phy if present */
phy = devm_phy_get(dev, "pcie-phy");
diff --git a/drivers/pci/dwc/pci-keystone.h b/drivers/pci/dwc/pci-keystone.h
index bc54baf..74c5825 100644
--- a/drivers/pci/dwc/pci-keystone.h
+++ b/drivers/pci/dwc/pci-keystone.h
@@ -17,7 +17,7 @@
#define MAX_LEGACY_HOST_IRQS 4
struct keystone_pcie {
- struct pcie_port pp; /* pp.dbi_base is DT 0th res */
+ struct dw_pcie *pci;
struct clk *clk;
/* PCI Device ID */
u32 device_id;
@@ -54,10 +54,10 @@ int ks_dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
int ks_dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
unsigned int devfn, int where, int size, u32 *val);
void ks_dw_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie);
-int ks_dw_pcie_link_up(struct pcie_port *pp);
void ks_dw_pcie_initiate_link_train(struct keystone_pcie *ks_pcie);
void ks_dw_pcie_msi_set_irq(struct pcie_port *pp, int irq);
void ks_dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq);
void ks_dw_pcie_v3_65_scan_bus(struct pcie_port *pp);
int ks_dw_pcie_msi_host_init(struct pcie_port *pp,
struct msi_controller *chip);
+int ks_dw_pcie_link_up(struct dw_pcie *pci);
diff --git a/drivers/pci/dwc/pci-layerscape.c b/drivers/pci/dwc/pci-layerscape.c
index 89e8817..f69d2fe 100644
--- a/drivers/pci/dwc/pci-layerscape.c
+++ b/drivers/pci/dwc/pci-layerscape.c
@@ -39,24 +39,26 @@ struct ls_pcie_drvdata {
u32 lut_offset;
u32 ltssm_shift;
u32 lut_dbg;
- struct pcie_host_ops *ops;
+ struct dw_pcie_host_ops *ops;
+ const struct dw_pcie_ops *dw_pcie_ops;
};
struct ls_pcie {
- struct pcie_port pp; /* pp.dbi_base is DT regs */
+ struct dw_pcie *pci;
void __iomem *lut;
struct regmap *scfg;
const struct ls_pcie_drvdata *drvdata;
int index;
};
-#define to_ls_pcie(x) container_of(x, struct ls_pcie, pp)
+#define to_ls_pcie(x) dev_get_drvdata((x)->dev)
static bool ls_pcie_is_bridge(struct ls_pcie *pcie)
{
+ struct dw_pcie *pci = pcie->pci;
u32 header_type;
- header_type = ioread8(pcie->pp.dbi_base + PCI_HEADER_TYPE);
+ header_type = ioread8(pci->dbi_base + PCI_HEADER_TYPE);
header_type &= 0x7f;
return header_type == PCI_HEADER_TYPE_BRIDGE;
@@ -65,29 +67,34 @@ static bool ls_pcie_is_bridge(struct ls_pcie *pcie)
/* Clear multi-function bit */
static void ls_pcie_clear_multifunction(struct ls_pcie *pcie)
{
- iowrite8(PCI_HEADER_TYPE_BRIDGE, pcie->pp.dbi_base + PCI_HEADER_TYPE);
+ struct dw_pcie *pci = pcie->pci;
+
+ iowrite8(PCI_HEADER_TYPE_BRIDGE, pci->dbi_base + PCI_HEADER_TYPE);
}
/* Fix class value */
static void ls_pcie_fix_class(struct ls_pcie *pcie)
{
- iowrite16(PCI_CLASS_BRIDGE_PCI, pcie->pp.dbi_base + PCI_CLASS_DEVICE);
+ struct dw_pcie *pci = pcie->pci;
+
+ iowrite16(PCI_CLASS_BRIDGE_PCI, pci->dbi_base + PCI_CLASS_DEVICE);
}
/* Drop MSG TLP except for Vendor MSG */
static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie)
{
u32 val;
+ struct dw_pcie *pci = pcie->pci;
- val = ioread32(pcie->pp.dbi_base + PCIE_STRFMR1);
+ val = ioread32(pci->dbi_base + PCIE_STRFMR1);
val &= 0xDFFFFFFF;
- iowrite32(val, pcie->pp.dbi_base + PCIE_STRFMR1);
+ iowrite32(val, pci->dbi_base + PCIE_STRFMR1);
}
-static int ls1021_pcie_link_up(struct pcie_port *pp)
+static int ls1021_pcie_link_up(struct dw_pcie *pci)
{
u32 state;
- struct ls_pcie *pcie = to_ls_pcie(pp);
+ struct ls_pcie *pcie = to_ls_pcie(pci);
if (!pcie->scfg)
return 0;
@@ -103,8 +110,9 @@ static int ls1021_pcie_link_up(struct pcie_port *pp)
static void ls1021_pcie_host_init(struct pcie_port *pp)
{
- struct device *dev = pp->dev;
- struct ls_pcie *pcie = to_ls_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct ls_pcie *pcie = to_ls_pcie(pci);
+ struct device *dev = pci->dev;
u32 index[2];
pcie->scfg = syscon_regmap_lookup_by_phandle(dev->of_node,
@@ -127,9 +135,9 @@ static void ls1021_pcie_host_init(struct pcie_port *pp)
ls_pcie_drop_msg_tlp(pcie);
}
-static int ls_pcie_link_up(struct pcie_port *pp)
+static int ls_pcie_link_up(struct dw_pcie *pci)
{
- struct ls_pcie *pcie = to_ls_pcie(pp);
+ struct ls_pcie *pcie = to_ls_pcie(pci);
u32 state;
state = (ioread32(pcie->lut + pcie->drvdata->lut_dbg) >>
@@ -144,19 +152,21 @@ static int ls_pcie_link_up(struct pcie_port *pp)
static void ls_pcie_host_init(struct pcie_port *pp)
{
- struct ls_pcie *pcie = to_ls_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct ls_pcie *pcie = to_ls_pcie(pci);
- iowrite32(1, pcie->pp.dbi_base + PCIE_DBI_RO_WR_EN);
+ iowrite32(1, pci->dbi_base + PCIE_DBI_RO_WR_EN);
ls_pcie_fix_class(pcie);
ls_pcie_clear_multifunction(pcie);
ls_pcie_drop_msg_tlp(pcie);
- iowrite32(0, pcie->pp.dbi_base + PCIE_DBI_RO_WR_EN);
+ iowrite32(0, pci->dbi_base + PCIE_DBI_RO_WR_EN);
}
static int ls_pcie_msi_host_init(struct pcie_port *pp,
struct msi_controller *chip)
{
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct device *dev = pci->dev;
struct device_node *np = dev->of_node;
struct device_node *msi_node;
@@ -175,20 +185,27 @@ static int ls_pcie_msi_host_init(struct pcie_port *pp,
return 0;
}
-static struct pcie_host_ops ls1021_pcie_host_ops = {
- .link_up = ls1021_pcie_link_up,
+static struct dw_pcie_host_ops ls1021_pcie_host_ops = {
.host_init = ls1021_pcie_host_init,
.msi_host_init = ls_pcie_msi_host_init,
};
-static struct pcie_host_ops ls_pcie_host_ops = {
- .link_up = ls_pcie_link_up,
+static struct dw_pcie_host_ops ls_pcie_host_ops = {
.host_init = ls_pcie_host_init,
.msi_host_init = ls_pcie_msi_host_init,
};
+static const struct dw_pcie_ops dw_ls1021_pcie_ops = {
+ .link_up = ls1021_pcie_link_up,
+};
+
+static const struct dw_pcie_ops dw_ls_pcie_ops = {
+ .link_up = ls_pcie_link_up,
+};
+
static struct ls_pcie_drvdata ls1021_drvdata = {
.ops = &ls1021_pcie_host_ops,
+ .dw_pcie_ops = &dw_ls1021_pcie_ops,
};
static struct ls_pcie_drvdata ls1043_drvdata = {
@@ -196,6 +213,7 @@ static int ls_pcie_msi_host_init(struct pcie_port *pp,
.ltssm_shift = 24,
.lut_dbg = 0x7fc,
.ops = &ls_pcie_host_ops,
+ .dw_pcie_ops = &dw_ls_pcie_ops,
};
static struct ls_pcie_drvdata ls1046_drvdata = {
@@ -203,6 +221,7 @@ static int ls_pcie_msi_host_init(struct pcie_port *pp,
.ltssm_shift = 24,
.lut_dbg = 0x407fc,
.ops = &ls_pcie_host_ops,
+ .dw_pcie_ops = &dw_ls_pcie_ops,
};
static struct ls_pcie_drvdata ls2080_drvdata = {
@@ -210,6 +229,7 @@ static int ls_pcie_msi_host_init(struct pcie_port *pp,
.ltssm_shift = 0,
.lut_dbg = 0x7fc,
.ops = &ls_pcie_host_ops,
+ .dw_pcie_ops = &dw_ls_pcie_ops,
};
static const struct of_device_id ls_pcie_of_match[] = {
@@ -223,10 +243,13 @@ static int ls_pcie_msi_host_init(struct pcie_port *pp,
static int __init ls_add_pcie_port(struct ls_pcie *pcie)
{
- struct pcie_port *pp = &pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = pci->dev;
int ret;
+ pp->ops = pcie->drvdata->ops;
+
ret = dw_pcie_host_init(pp);
if (ret) {
dev_err(dev, "failed to initialize host\n");
@@ -240,8 +263,8 @@ static int __init ls_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
const struct of_device_id *match;
+ struct dw_pcie *pci;
struct ls_pcie *pcie;
- struct pcie_port *pp;
struct resource *dbi_base;
int ret;
@@ -253,17 +276,21 @@ static int __init ls_pcie_probe(struct platform_device *pdev)
if (!pcie)
return -ENOMEM;
- pp = &pcie->pp;
- pp->dev = dev;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
pcie->drvdata = match->data;
- pp->ops = pcie->drvdata->ops;
+
+ pci->dev = dev;
+ pci->ops = pcie->drvdata->dw_pcie_ops;
dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
- pcie->pp.dbi_base = devm_ioremap_resource(dev, dbi_base);
- if (IS_ERR(pcie->pp.dbi_base))
- return PTR_ERR(pcie->pp.dbi_base);
+ pci->dbi_base = devm_ioremap_resource(dev, dbi_base);
+ if (IS_ERR(pci->dbi_base))
+ return PTR_ERR(pci->dbi_base);
- pcie->lut = pcie->pp.dbi_base + pcie->drvdata->lut_offset;
+ pcie->lut = pci->dbi_base + pcie->drvdata->lut_offset;
if (!ls_pcie_is_bridge(pcie))
return -ENODEV;
diff --git a/drivers/pci/dwc/pcie-armada8k.c b/drivers/pci/dwc/pcie-armada8k.c
index 5a28dcb..66bac6f 100644
--- a/drivers/pci/dwc/pcie-armada8k.c
+++ b/drivers/pci/dwc/pcie-armada8k.c
@@ -29,7 +29,7 @@
#include "pcie-designware.h"
struct armada8k_pcie {
- struct pcie_port pp; /* pp.dbi_base is DT ctrl */
+ struct dw_pcie *pci;
struct clk *clk;
};
@@ -67,76 +67,77 @@ struct armada8k_pcie {
#define AX_USER_DOMAIN_MASK 0x3
#define AX_USER_DOMAIN_SHIFT 4
-#define to_armada8k_pcie(x) container_of(x, struct armada8k_pcie, pp)
+#define to_armada8k_pcie(x) dev_get_drvdata((x)->dev)
-static int armada8k_pcie_link_up(struct pcie_port *pp)
+static int armada8k_pcie_link_up(struct dw_pcie *pci)
{
u32 reg;
u32 mask = PCIE_GLB_STS_RDLH_LINK_UP | PCIE_GLB_STS_PHY_LINK_UP;
- reg = dw_pcie_readl_rc(pp, PCIE_GLOBAL_STATUS_REG);
+ reg = dw_pcie_readl_dbi(pci, PCIE_GLOBAL_STATUS_REG);
if ((reg & mask) == mask)
return 1;
- dev_dbg(pp->dev, "No link detected (Global-Status: 0x%08x).\n", reg);
+ dev_dbg(pci->dev, "No link detected (Global-Status: 0x%08x).\n", reg);
return 0;
}
static void armada8k_pcie_establish_link(struct armada8k_pcie *pcie)
{
- struct pcie_port *pp = &pcie->pp;
+ struct dw_pcie *pci = pcie->pci;
u32 reg;
- if (!dw_pcie_link_up(pp)) {
+ if (!dw_pcie_link_up(pci)) {
/* Disable LTSSM state machine to enable configuration */
- reg = dw_pcie_readl_rc(pp, PCIE_GLOBAL_CONTROL_REG);
+ reg = dw_pcie_readl_dbi(pci, PCIE_GLOBAL_CONTROL_REG);
reg &= ~(PCIE_APP_LTSSM_EN);
- dw_pcie_writel_rc(pp, PCIE_GLOBAL_CONTROL_REG, reg);
+ dw_pcie_writel_dbi(pci, PCIE_GLOBAL_CONTROL_REG, reg);
}
/* Set the device to root complex mode */
- reg = dw_pcie_readl_rc(pp, PCIE_GLOBAL_CONTROL_REG);
+ reg = dw_pcie_readl_dbi(pci, PCIE_GLOBAL_CONTROL_REG);
reg &= ~(PCIE_DEVICE_TYPE_MASK << PCIE_DEVICE_TYPE_SHIFT);
reg |= PCIE_DEVICE_TYPE_RC << PCIE_DEVICE_TYPE_SHIFT;
- dw_pcie_writel_rc(pp, PCIE_GLOBAL_CONTROL_REG, reg);
+ dw_pcie_writel_dbi(pci, PCIE_GLOBAL_CONTROL_REG, reg);
/* Set the PCIe master AxCache attributes */
- dw_pcie_writel_rc(pp, PCIE_ARCACHE_TRC_REG, ARCACHE_DEFAULT_VALUE);
- dw_pcie_writel_rc(pp, PCIE_AWCACHE_TRC_REG, AWCACHE_DEFAULT_VALUE);
+ dw_pcie_writel_dbi(pci, PCIE_ARCACHE_TRC_REG, ARCACHE_DEFAULT_VALUE);
+ dw_pcie_writel_dbi(pci, PCIE_AWCACHE_TRC_REG, AWCACHE_DEFAULT_VALUE);
/* Set the PCIe master AxDomain attributes */
- reg = dw_pcie_readl_rc(pp, PCIE_ARUSER_REG);
+ reg = dw_pcie_readl_dbi(pci, PCIE_ARUSER_REG);
reg &= ~(AX_USER_DOMAIN_MASK << AX_USER_DOMAIN_SHIFT);
reg |= DOMAIN_OUTER_SHAREABLE << AX_USER_DOMAIN_SHIFT;
- dw_pcie_writel_rc(pp, PCIE_ARUSER_REG, reg);
+ dw_pcie_writel_dbi(pci, PCIE_ARUSER_REG, reg);
- reg = dw_pcie_readl_rc(pp, PCIE_AWUSER_REG);
+ reg = dw_pcie_readl_dbi(pci, PCIE_AWUSER_REG);
reg &= ~(AX_USER_DOMAIN_MASK << AX_USER_DOMAIN_SHIFT);
reg |= DOMAIN_OUTER_SHAREABLE << AX_USER_DOMAIN_SHIFT;
- dw_pcie_writel_rc(pp, PCIE_AWUSER_REG, reg);
+ dw_pcie_writel_dbi(pci, PCIE_AWUSER_REG, reg);
/* Enable INT A-D interrupts */
- reg = dw_pcie_readl_rc(pp, PCIE_GLOBAL_INT_MASK1_REG);
+ reg = dw_pcie_readl_dbi(pci, PCIE_GLOBAL_INT_MASK1_REG);
reg |= PCIE_INT_A_ASSERT_MASK | PCIE_INT_B_ASSERT_MASK |
PCIE_INT_C_ASSERT_MASK | PCIE_INT_D_ASSERT_MASK;
- dw_pcie_writel_rc(pp, PCIE_GLOBAL_INT_MASK1_REG, reg);
+ dw_pcie_writel_dbi(pci, PCIE_GLOBAL_INT_MASK1_REG, reg);
- if (!dw_pcie_link_up(pp)) {
+ if (!dw_pcie_link_up(pci)) {
/* Configuration done. Start LTSSM */
- reg = dw_pcie_readl_rc(pp, PCIE_GLOBAL_CONTROL_REG);
+ reg = dw_pcie_readl_dbi(pci, PCIE_GLOBAL_CONTROL_REG);
reg |= PCIE_APP_LTSSM_EN;
- dw_pcie_writel_rc(pp, PCIE_GLOBAL_CONTROL_REG, reg);
+ dw_pcie_writel_dbi(pci, PCIE_GLOBAL_CONTROL_REG, reg);
}
/* Wait until the link becomes active again */
- if (dw_pcie_wait_for_link(pp))
- dev_err(pp->dev, "Link not up after reconfiguration\n");
+ if (dw_pcie_wait_for_link(pci))
+ dev_err(pci->dev, "Link not up after reconfiguration\n");
}
static void armada8k_pcie_host_init(struct pcie_port *pp)
{
- struct armada8k_pcie *pcie = to_armada8k_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct armada8k_pcie *pcie = to_armada8k_pcie(pci);
dw_pcie_setup_rc(pp);
armada8k_pcie_establish_link(pcie);
@@ -145,7 +146,7 @@ static void armada8k_pcie_host_init(struct pcie_port *pp)
static irqreturn_t armada8k_pcie_irq_handler(int irq, void *arg)
{
struct armada8k_pcie *pcie = arg;
- struct pcie_port *pp = &pcie->pp;
+ struct dw_pcie *pci = pcie->pci;
u32 val;
/*
@@ -153,21 +154,21 @@ static irqreturn_t armada8k_pcie_irq_handler(int irq, void *arg)
* PCI device. However, they are also latched into the PCIe
* controller, so we simply discard them.
*/
- val = dw_pcie_readl_rc(pp, PCIE_GLOBAL_INT_CAUSE1_REG);
- dw_pcie_writel_rc(pp, PCIE_GLOBAL_INT_CAUSE1_REG, val);
+ val = dw_pcie_readl_dbi(pci, PCIE_GLOBAL_INT_CAUSE1_REG);
+ dw_pcie_writel_dbi(pci, PCIE_GLOBAL_INT_CAUSE1_REG, val);
return IRQ_HANDLED;
}
-static struct pcie_host_ops armada8k_pcie_host_ops = {
- .link_up = armada8k_pcie_link_up,
+static struct dw_pcie_host_ops armada8k_pcie_host_ops = {
.host_init = armada8k_pcie_host_init,
};
static int armada8k_add_pcie_port(struct armada8k_pcie *pcie,
struct platform_device *pdev)
{
- struct pcie_port *pp = &pcie->pp;
+ struct dw_pcie *pci = pcie->pci;
+ struct pcie_port *pp = &pci->pp;
struct device *dev = &pdev->dev;
int ret;
@@ -196,10 +197,14 @@ static int armada8k_add_pcie_port(struct armada8k_pcie *pcie,
return 0;
}
+static const struct dw_pcie_ops dw_pcie_ops = {
+ .link_up = armada8k_pcie_link_up,
+};
+
static int armada8k_pcie_probe(struct platform_device *pdev)
{
+ struct dw_pcie *pci;
struct armada8k_pcie *pcie;
- struct pcie_port *pp;
struct device *dev = &pdev->dev;
struct resource *base;
int ret;
@@ -208,21 +213,25 @@ static int armada8k_pcie_probe(struct platform_device *pdev)
if (!pcie)
return -ENOMEM;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
+ pci->ops = &dw_pcie_ops;
+
pcie->clk = devm_clk_get(dev, NULL);
if (IS_ERR(pcie->clk))
return PTR_ERR(pcie->clk);
clk_prepare_enable(pcie->clk);
- pp = &pcie->pp;
- pp->dev = dev;
-
/* Get the dw-pcie unit configuration/control registers base. */
base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl");
- pp->dbi_base = devm_ioremap_resource(dev, base);
- if (IS_ERR(pp->dbi_base)) {
+ pci->dbi_base = devm_ioremap_resource(dev, base);
+ if (IS_ERR(pci->dbi_base)) {
dev_err(dev, "couldn't remap regs base %p\n", base);
- ret = PTR_ERR(pp->dbi_base);
+ ret = PTR_ERR(pci->dbi_base);
goto fail;
}
diff --git a/drivers/pci/dwc/pcie-artpec6.c b/drivers/pci/dwc/pcie-artpec6.c
index 187a98d..59ecc9e 100644
--- a/drivers/pci/dwc/pcie-artpec6.c
+++ b/drivers/pci/dwc/pcie-artpec6.c
@@ -24,10 +24,10 @@
#include "pcie-designware.h"
-#define to_artpec6_pcie(x) container_of(x, struct artpec6_pcie, pp)
+#define to_artpec6_pcie(x) dev_get_drvdata((x)->dev)
struct artpec6_pcie {
- struct pcie_port pp; /* pp.dbi_base is DT dbi */
+ struct dw_pcie *pci;
struct regmap *regmap; /* DT axis,syscon-pcie */
void __iomem *phy_base; /* DT phy */
};
@@ -80,7 +80,8 @@ static void artpec6_pcie_writel(struct artpec6_pcie *artpec6_pcie, u32 offset, u
static int artpec6_pcie_establish_link(struct artpec6_pcie *artpec6_pcie)
{
- struct pcie_port *pp = &artpec6_pcie->pp;
+ struct dw_pcie *pci = artpec6_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
u32 val;
unsigned int retries;
@@ -139,7 +140,7 @@ static int artpec6_pcie_establish_link(struct artpec6_pcie *artpec6_pcie)
* Enable writing to config regs. This is required as the Synopsys
* driver changes the class code. That register needs DBI write enable.
*/
- dw_pcie_writel_rc(pp, MISC_CONTROL_1_OFF, DBI_RO_WR_EN);
+ dw_pcie_writel_dbi(pci, MISC_CONTROL_1_OFF, DBI_RO_WR_EN);
pp->io_base &= ARTPEC6_CPU_TO_BUS_ADDR;
pp->mem_base &= ARTPEC6_CPU_TO_BUS_ADDR;
@@ -155,19 +156,20 @@ static int artpec6_pcie_establish_link(struct artpec6_pcie *artpec6_pcie)
artpec6_pcie_writel(artpec6_pcie, PCIECFG, val);
/* check if the link is up or not */
- if (!dw_pcie_wait_for_link(pp))
+ if (!dw_pcie_wait_for_link(pci))
return 0;
- dev_dbg(pp->dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n",
- dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R0),
- dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R1));
+ dev_dbg(pci->dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n",
+ dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R0),
+ dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R1));
return -ETIMEDOUT;
}
static void artpec6_pcie_enable_interrupts(struct artpec6_pcie *artpec6_pcie)
{
- struct pcie_port *pp = &artpec6_pcie->pp;
+ struct dw_pcie *pci = artpec6_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
if (IS_ENABLED(CONFIG_PCI_MSI))
dw_pcie_msi_init(pp);
@@ -175,20 +177,22 @@ static void artpec6_pcie_enable_interrupts(struct artpec6_pcie *artpec6_pcie)
static void artpec6_pcie_host_init(struct pcie_port *pp)
{
- struct artpec6_pcie *artpec6_pcie = to_artpec6_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct artpec6_pcie *artpec6_pcie = to_artpec6_pcie(pci);
artpec6_pcie_establish_link(artpec6_pcie);
artpec6_pcie_enable_interrupts(artpec6_pcie);
}
-static struct pcie_host_ops artpec6_pcie_host_ops = {
+static struct dw_pcie_host_ops artpec6_pcie_host_ops = {
.host_init = artpec6_pcie_host_init,
};
static irqreturn_t artpec6_pcie_msi_handler(int irq, void *arg)
{
struct artpec6_pcie *artpec6_pcie = arg;
- struct pcie_port *pp = &artpec6_pcie->pp;
+ struct dw_pcie *pci = artpec6_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
return dw_handle_msi_irq(pp);
}
@@ -196,8 +200,9 @@ static irqreturn_t artpec6_pcie_msi_handler(int irq, void *arg)
static int artpec6_add_pcie_port(struct artpec6_pcie *artpec6_pcie,
struct platform_device *pdev)
{
- struct pcie_port *pp = &artpec6_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = artpec6_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = pci->dev;
int ret;
if (IS_ENABLED(CONFIG_PCI_MSI)) {
@@ -232,8 +237,8 @@ static int artpec6_add_pcie_port(struct artpec6_pcie *artpec6_pcie,
static int artpec6_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ struct dw_pcie *pci;
struct artpec6_pcie *artpec6_pcie;
- struct pcie_port *pp;
struct resource *dbi_base;
struct resource *phy_base;
int ret;
@@ -242,13 +247,16 @@ static int artpec6_pcie_probe(struct platform_device *pdev)
if (!artpec6_pcie)
return -ENOMEM;
- pp = &artpec6_pcie->pp;
- pp->dev = dev;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
- pp->dbi_base = devm_ioremap_resource(dev, dbi_base);
- if (IS_ERR(pp->dbi_base))
- return PTR_ERR(pp->dbi_base);
+ pci->dbi_base = devm_ioremap_resource(dev, dbi_base);
+ if (IS_ERR(pci->dbi_base))
+ return PTR_ERR(pci->dbi_base);
phy_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
artpec6_pcie->phy_base = devm_ioremap_resource(dev, phy_base);
diff --git a/drivers/pci/dwc/pcie-designware-plat.c b/drivers/pci/dwc/pcie-designware-plat.c
index bb58540..65250f6 100644
--- a/drivers/pci/dwc/pcie-designware-plat.c
+++ b/drivers/pci/dwc/pcie-designware-plat.c
@@ -25,7 +25,7 @@
#include "pcie-designware.h"
struct dw_plat_pcie {
- struct pcie_port pp; /* pp.dbi_base is DT 0th resource */
+ struct dw_pcie *pci;
};
static irqreturn_t dw_plat_pcie_msi_irq_handler(int irq, void *arg)
@@ -37,21 +37,23 @@ static irqreturn_t dw_plat_pcie_msi_irq_handler(int irq, void *arg)
static void dw_plat_pcie_host_init(struct pcie_port *pp)
{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
dw_pcie_setup_rc(pp);
- dw_pcie_wait_for_link(pp);
+ dw_pcie_wait_for_link(pci);
if (IS_ENABLED(CONFIG_PCI_MSI))
dw_pcie_msi_init(pp);
}
-static struct pcie_host_ops dw_plat_pcie_host_ops = {
+static struct dw_pcie_host_ops dw_plat_pcie_host_ops = {
.host_init = dw_plat_pcie_host_init,
};
static int dw_plat_add_pcie_port(struct pcie_port *pp,
struct platform_device *pdev)
{
- struct device *dev = pp->dev;
+ struct device *dev = &pdev->dev;
int ret;
pp->irq = platform_get_irq(pdev, 1);
@@ -88,7 +90,7 @@ static int dw_plat_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct dw_plat_pcie *dw_plat_pcie;
- struct pcie_port *pp;
+ struct dw_pcie *pci;
struct resource *res; /* Resource from DT */
int ret;
@@ -96,17 +98,20 @@ static int dw_plat_pcie_probe(struct platform_device *pdev)
if (!dw_plat_pcie)
return -ENOMEM;
- pp = &dw_plat_pcie->pp;
- pp->dev = dev;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- pp->dbi_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(pp->dbi_base))
- return PTR_ERR(pp->dbi_base);
+ pci->dbi_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(pci->dbi_base))
+ return PTR_ERR(pci->dbi_base);
platform_set_drvdata(pdev, dw_plat_pcie);
- ret = dw_plat_add_pcie_port(pp, pdev);
+ ret = dw_plat_add_pcie_port(&pci->pp, pdev);
if (ret < 0)
return ret;
diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index 330596b..00a0fdc 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -71,93 +71,100 @@ int dw_pcie_write(void __iomem *addr, int size, u32 val)
return PCIBIOS_SUCCESSFUL;
}
-u32 dw_pcie_readl_rc(struct pcie_port *pp, u32 reg)
+u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
{
- if (pp->ops->readl_rc)
- return pp->ops->readl_rc(pp, reg);
+ if (pci->ops->readl_dbi)
+ return pci->ops->readl_dbi(pci, reg);
- return readl(pp->dbi_base + reg);
+ return readl(pci->dbi_base + reg);
}
-void dw_pcie_writel_rc(struct pcie_port *pp, u32 reg, u32 val)
+void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
{
- if (pp->ops->writel_rc)
- pp->ops->writel_rc(pp, reg, val);
+ if (pci->ops->writel_dbi)
+ pci->ops->writel_dbi(pci, reg, val);
else
- writel(val, pp->dbi_base + reg);
+ writel(val, pci->dbi_base + reg);
}
-static u32 dw_pcie_readl_unroll(struct pcie_port *pp, u32 index, u32 reg)
+static u32 dw_pcie_readl_unroll(struct dw_pcie *pci, u32 index, u32 reg)
{
u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
- return dw_pcie_readl_rc(pp, offset + reg);
+ return dw_pcie_readl_dbi(pci, offset + reg);
}
-static void dw_pcie_writel_unroll(struct pcie_port *pp, u32 index, u32 reg,
+static void dw_pcie_writel_unroll(struct dw_pcie *pci, u32 index, u32 reg,
u32 val)
{
u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
- dw_pcie_writel_rc(pp, offset + reg, val);
+ dw_pcie_writel_dbi(pci, offset + reg, val);
}
static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
u32 *val)
{
+ struct dw_pcie *pci;
+
if (pp->ops->rd_own_conf)
return pp->ops->rd_own_conf(pp, where, size, val);
- return dw_pcie_read(pp->dbi_base + where, size, val);
+ pci = to_dw_pcie_from_pp(pp);
+ return dw_pcie_read(pci->dbi_base + where, size, val);
}
static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
u32 val)
{
+ struct dw_pcie *pci;
+
if (pp->ops->wr_own_conf)
return pp->ops->wr_own_conf(pp, where, size, val);
- return dw_pcie_write(pp->dbi_base + where, size, val);
+ pci = to_dw_pcie_from_pp(pp);
+ return dw_pcie_write(pci->dbi_base + where, size, val);
}
-static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
- int type, u64 cpu_addr, u64 pci_addr, u32 size)
+static void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
+ int type, u64 cpu_addr, u64 pci_addr,
+ u32 size)
{
u32 retries, val;
- if (pp->ops->cpu_addr_fixup)
- cpu_addr = pp->ops->cpu_addr_fixup(cpu_addr);
-
- if (pp->iatu_unroll_enabled) {
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_LOWER_BASE,
- lower_32_bits(cpu_addr));
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_UPPER_BASE,
- upper_32_bits(cpu_addr));
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_LIMIT,
- lower_32_bits(cpu_addr + size - 1));
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_LOWER_TARGET,
- lower_32_bits(pci_addr));
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_UPPER_TARGET,
- upper_32_bits(pci_addr));
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_REGION_CTRL1,
- type);
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_REGION_CTRL2,
- PCIE_ATU_ENABLE);
+ if (pci->ops->cpu_addr_fixup)
+ cpu_addr = pci->ops->cpu_addr_fixup(cpu_addr);
+
+ if (pci->iatu_unroll_enabled) {
+ dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_LOWER_BASE,
+ lower_32_bits(cpu_addr));
+ dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_UPPER_BASE,
+ upper_32_bits(cpu_addr));
+ dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_LIMIT,
+ lower_32_bits(cpu_addr + size - 1));
+ dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_LOWER_TARGET,
+ lower_32_bits(pci_addr));
+ dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_UPPER_TARGET,
+ upper_32_bits(pci_addr));
+ dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1,
+ type);
+ dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL2,
+ PCIE_ATU_ENABLE);
} else {
- dw_pcie_writel_rc(pp, PCIE_ATU_VIEWPORT,
- PCIE_ATU_REGION_OUTBOUND | index);
- dw_pcie_writel_rc(pp, PCIE_ATU_LOWER_BASE,
- lower_32_bits(cpu_addr));
- dw_pcie_writel_rc(pp, PCIE_ATU_UPPER_BASE,
- upper_32_bits(cpu_addr));
- dw_pcie_writel_rc(pp, PCIE_ATU_LIMIT,
- lower_32_bits(cpu_addr + size - 1));
- dw_pcie_writel_rc(pp, PCIE_ATU_LOWER_TARGET,
- lower_32_bits(pci_addr));
- dw_pcie_writel_rc(pp, PCIE_ATU_UPPER_TARGET,
- upper_32_bits(pci_addr));
- dw_pcie_writel_rc(pp, PCIE_ATU_CR1, type);
- dw_pcie_writel_rc(pp, PCIE_ATU_CR2, PCIE_ATU_ENABLE);
+ dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT,
+ PCIE_ATU_REGION_OUTBOUND | index);
+ dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_BASE,
+ lower_32_bits(cpu_addr));
+ dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_BASE,
+ upper_32_bits(cpu_addr));
+ dw_pcie_writel_dbi(pci, PCIE_ATU_LIMIT,
+ lower_32_bits(cpu_addr + size - 1));
+ dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_TARGET,
+ lower_32_bits(pci_addr));
+ dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_TARGET,
+ upper_32_bits(pci_addr));
+ dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, type);
+ dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE);
}
/*
@@ -165,18 +172,18 @@ static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
* and I/O accesses.
*/
for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) {
- if (pp->iatu_unroll_enabled)
- val = dw_pcie_readl_unroll(pp, index,
+ if (pci->iatu_unroll_enabled)
+ val = dw_pcie_readl_unroll(pci, index,
PCIE_ATU_UNR_REGION_CTRL2);
else
- val = dw_pcie_readl_rc(pp, PCIE_ATU_CR2);
+ val = dw_pcie_readl_dbi(pci, PCIE_ATU_CR2);
if (val == PCIE_ATU_ENABLE)
return;
usleep_range(LINK_WAIT_IATU_MIN, LINK_WAIT_IATU_MAX);
}
- dev_err(pp->dev, "iATU is not being enabled\n");
+ dev_err(pci->dev, "iATU is not being enabled\n");
}
static struct irq_chip dw_msi_irq_chip = {
@@ -393,32 +400,32 @@ static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
.teardown_irq = dw_msi_teardown_irq,
};
-int dw_pcie_wait_for_link(struct pcie_port *pp)
+int dw_pcie_wait_for_link(struct dw_pcie *pci)
{
int retries;
/* check if the link is up or not */
for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
- if (dw_pcie_link_up(pp)) {
- dev_info(pp->dev, "link up\n");
+ if (dw_pcie_link_up(pci)) {
+ dev_info(pci->dev, "link up\n");
return 0;
}
usleep_range(LINK_WAIT_USLEEP_MIN, LINK_WAIT_USLEEP_MAX);
}
- dev_err(pp->dev, "phy link never came up\n");
+ dev_err(pci->dev, "phy link never came up\n");
return -ETIMEDOUT;
}
-int dw_pcie_link_up(struct pcie_port *pp)
+int dw_pcie_link_up(struct dw_pcie *pci)
{
u32 val;
- if (pp->ops->link_up)
- return pp->ops->link_up(pp);
+ if (pci->ops->link_up)
+ return pci->ops->link_up(pci);
- val = readl(pp->dbi_base + PCIE_PHY_DEBUG_R1);
+ val = readl(pci->dbi_base + PCIE_PHY_DEBUG_R1);
return ((val & PCIE_PHY_DEBUG_R1_LINK_UP) &&
(!(val & PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING)));
}
@@ -436,11 +443,11 @@ static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
.map = dw_pcie_msi_map,
};
-static u8 dw_pcie_iatu_unroll_enabled(struct pcie_port *pp)
+static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
{
u32 val;
- val = dw_pcie_readl_rc(pp, PCIE_ATU_VIEWPORT);
+ val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT);
if (val == 0xffffffff)
return 1;
@@ -449,7 +456,8 @@ static u8 dw_pcie_iatu_unroll_enabled(struct pcie_port *pp)
int dw_pcie_host_init(struct pcie_port *pp)
{
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct device *dev = pci->dev;
struct device_node *np = dev->of_node;
struct platform_device *pdev = to_platform_device(dev);
struct pci_bus *bus, *child;
@@ -543,13 +551,13 @@ int dw_pcie_host_init(struct pcie_port *pp)
}
}
- ret = of_property_read_u32(np, "num-lanes", &pp->lanes);
+ ret = of_property_read_u32(np, "num-lanes", &pci->lanes);
if (ret)
- pp->lanes = 0;
+ pci->lanes = 0;
- ret = of_property_read_u32(np, "num-viewport", &pp->num_viewport);
+ ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport);
if (ret)
- pp->num_viewport = 2;
+ pci->num_viewport = 2;
if (IS_ENABLED(CONFIG_PCI_MSI)) {
if (!pp->ops->msi_host_init) {
@@ -617,6 +625,7 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 busdev, cfg_size;
u64 cpu_addr;
void __iomem *va_cfg_base;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
if (pp->ops->rd_other_conf)
return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
@@ -636,12 +645,12 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
va_cfg_base = pp->va_cfg1_base;
}
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
type, cpu_addr,
busdev, cfg_size);
ret = dw_pcie_read(va_cfg_base + where, size, val);
- if (pp->num_viewport <= 2)
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
+ if (pci->num_viewport <= 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
PCIE_ATU_TYPE_IO, pp->io_base,
pp->io_bus_addr, pp->io_size);
@@ -655,6 +664,7 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 busdev, cfg_size;
u64 cpu_addr;
void __iomem *va_cfg_base;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
if (pp->ops->wr_other_conf)
return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
@@ -674,12 +684,12 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
va_cfg_base = pp->va_cfg1_base;
}
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
type, cpu_addr,
busdev, cfg_size);
ret = dw_pcie_write(va_cfg_base + where, size, val);
- if (pp->num_viewport <= 2)
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
+ if (pci->num_viewport <= 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
PCIE_ATU_TYPE_IO, pp->io_base,
pp->io_bus_addr, pp->io_size);
@@ -689,9 +699,11 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus,
int dev)
{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
/* If there is no link, then there is no device */
if (bus->number != pp->root_bus_nr) {
- if (!dw_pcie_link_up(pp))
+ if (!dw_pcie_link_up(pci))
return 0;
}
@@ -740,16 +752,17 @@ static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
void dw_pcie_setup_rc(struct pcie_port *pp)
{
u32 val;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
/* get iATU unroll support */
- pp->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pp);
- dev_dbg(pp->dev, "iATU unroll: %s\n",
- pp->iatu_unroll_enabled ? "enabled" : "disabled");
+ pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci);
+ dev_dbg(pci->dev, "iATU unroll: %s\n",
+ pci->iatu_unroll_enabled ? "enabled" : "disabled");
/* set the number of lanes */
- val = dw_pcie_readl_rc(pp, PCIE_PORT_LINK_CONTROL);
+ val = dw_pcie_readl_dbi(pci, PCIE_PORT_LINK_CONTROL);
val &= ~PORT_LINK_MODE_MASK;
- switch (pp->lanes) {
+ switch (pci->lanes) {
case 1:
val |= PORT_LINK_MODE_1_LANES;
break;
@@ -763,15 +776,15 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
val |= PORT_LINK_MODE_8_LANES;
break;
default:
- dev_err(pp->dev, "num-lanes %u: invalid value\n", pp->lanes);
+ dev_err(pci->dev, "num-lanes %u: invalid value\n", pci->lanes);
return;
}
- dw_pcie_writel_rc(pp, PCIE_PORT_LINK_CONTROL, val);
+ dw_pcie_writel_dbi(pci, PCIE_PORT_LINK_CONTROL, val);
/* set link width speed control register */
- val = dw_pcie_readl_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL);
+ val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
val &= ~PORT_LOGIC_LINK_WIDTH_MASK;
- switch (pp->lanes) {
+ switch (pci->lanes) {
case 1:
val |= PORT_LOGIC_LINK_WIDTH_1_LANES;
break;
@@ -785,30 +798,30 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
val |= PORT_LOGIC_LINK_WIDTH_8_LANES;
break;
}
- dw_pcie_writel_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
+ dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
/* setup RC BARs */
- dw_pcie_writel_rc(pp, PCI_BASE_ADDRESS_0, 0x00000004);
- dw_pcie_writel_rc(pp, PCI_BASE_ADDRESS_1, 0x00000000);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000);
/* setup interrupt pins */
- val = dw_pcie_readl_rc(pp, PCI_INTERRUPT_LINE);
+ val = dw_pcie_readl_dbi(pci, PCI_INTERRUPT_LINE);
val &= 0xffff00ff;
val |= 0x00000100;
- dw_pcie_writel_rc(pp, PCI_INTERRUPT_LINE, val);
+ dw_pcie_writel_dbi(pci, PCI_INTERRUPT_LINE, val);
/* setup bus numbers */
- val = dw_pcie_readl_rc(pp, PCI_PRIMARY_BUS);
+ val = dw_pcie_readl_dbi(pci, PCI_PRIMARY_BUS);
val &= 0xff000000;
val |= 0x00010100;
- dw_pcie_writel_rc(pp, PCI_PRIMARY_BUS, val);
+ dw_pcie_writel_dbi(pci, PCI_PRIMARY_BUS, val);
/* setup command register */
- val = dw_pcie_readl_rc(pp, PCI_COMMAND);
+ val = dw_pcie_readl_dbi(pci, PCI_COMMAND);
val &= 0xffff0000;
val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
- dw_pcie_writel_rc(pp, PCI_COMMAND, val);
+ dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
/*
* If the platform provides ->rd_other_conf, it means the platform
@@ -816,11 +829,11 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
* we should not program the ATU here.
*/
if (!pp->ops->rd_other_conf) {
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX0,
PCIE_ATU_TYPE_MEM, pp->mem_base,
pp->mem_bus_addr, pp->mem_size);
- if (pp->num_viewport > 2)
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX2,
+ if (pci->num_viewport > 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX2,
PCIE_ATU_TYPE_IO, pp->io_base,
pp->io_bus_addr, pp->io_size);
}
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index b6ddb05..d4b3d43 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -93,10 +93,27 @@
#define MAX_MSI_IRQS 32
#define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32)
+struct pcie_port;
+struct dw_pcie;
+
+struct dw_pcie_host_ops {
+ int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
+ int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
+ int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
+ unsigned int devfn, int where, int size, u32 *val);
+ int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
+ unsigned int devfn, int where, int size, u32 val);
+ void (*host_init)(struct pcie_port *pp);
+ void (*msi_set_irq)(struct pcie_port *pp, int irq);
+ void (*msi_clear_irq)(struct pcie_port *pp, int irq);
+ phys_addr_t (*get_msi_addr)(struct pcie_port *pp);
+ u32 (*get_msi_data)(struct pcie_port *pp, int pos);
+ void (*scan_bus)(struct pcie_port *pp);
+ int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip);
+};
+
struct pcie_port {
- struct device *dev;
u8 root_bus_nr;
- void __iomem *dbi_base;
u64 cfg0_base;
void __iomem *va_cfg0_base;
u32 cfg0_size;
@@ -114,45 +131,41 @@ struct pcie_port {
struct resource *mem;
struct resource *busn;
int irq;
- u32 lanes;
- u32 num_viewport;
- struct pcie_host_ops *ops;
+ struct dw_pcie_host_ops *ops;
int msi_irq;
struct irq_domain *irq_domain;
unsigned long msi_data;
- u8 iatu_unroll_enabled;
DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
};
-struct pcie_host_ops {
- u64 (*cpu_addr_fixup)(u64 cpu_addr);
- u32 (*readl_rc)(struct pcie_port *pp, u32 reg);
- void (*writel_rc)(struct pcie_port *pp, u32 reg, u32 val);
- int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
- int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
- int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
- unsigned int devfn, int where, int size, u32 *val);
- int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
- unsigned int devfn, int where, int size, u32 val);
- int (*link_up)(struct pcie_port *pp);
- void (*host_init)(struct pcie_port *pp);
- void (*msi_set_irq)(struct pcie_port *pp, int irq);
- void (*msi_clear_irq)(struct pcie_port *pp, int irq);
- phys_addr_t (*get_msi_addr)(struct pcie_port *pp);
- u32 (*get_msi_data)(struct pcie_port *pp, int pos);
- void (*scan_bus)(struct pcie_port *pp);
- int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip);
+struct dw_pcie_ops {
+ u64 (*cpu_addr_fixup)(u64 cpu_addr);
+ u32 (*readl_dbi)(struct dw_pcie *pcie, u32 reg);
+ void (*writel_dbi)(struct dw_pcie *pcie, u32 reg, u32 val);
+ int (*link_up)(struct dw_pcie *pcie);
};
-u32 dw_pcie_readl_rc(struct pcie_port *pp, u32 reg);
-void dw_pcie_writel_rc(struct pcie_port *pp, u32 reg, u32 val);
+struct dw_pcie {
+ struct device *dev;
+ void __iomem *dbi_base;
+ u32 lanes;
+ u32 num_viewport;
+ u8 iatu_unroll_enabled;
+ struct pcie_port pp;
+ const struct dw_pcie_ops *ops;
+};
+
+#define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
+
int dw_pcie_read(void __iomem *addr, int size, u32 *val);
int dw_pcie_write(void __iomem *addr, int size, u32 val);
irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
void dw_pcie_msi_init(struct pcie_port *pp);
-int dw_pcie_wait_for_link(struct pcie_port *pp);
-int dw_pcie_link_up(struct pcie_port *pp);
void dw_pcie_setup_rc(struct pcie_port *pp);
int dw_pcie_host_init(struct pcie_port *pp);
+u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg);
+void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val);
+int dw_pcie_link_up(struct dw_pcie *pci);
+int dw_pcie_wait_for_link(struct dw_pcie *pci);
#endif /* _PCIE_DESIGNWARE_H */
diff --git a/drivers/pci/dwc/pcie-hisi.c b/drivers/pci/dwc/pcie-hisi.c
index ecc1b08..386467a 100644
--- a/drivers/pci/dwc/pcie-hisi.c
+++ b/drivers/pci/dwc/pcie-hisi.c
@@ -127,7 +127,7 @@ struct pci_ecam_ops hisi_pcie_ops = {
#define PCIE_LTSSM_LINKUP_STATE 0x11
#define PCIE_LTSSM_STATE_MASK 0x3F
-#define to_hisi_pcie(x) container_of(x, struct hisi_pcie, pp)
+#define to_hisi_pcie(x) dev_get_drvdata((x)->dev)
struct hisi_pcie;
@@ -136,7 +136,7 @@ struct pcie_soc_ops {
};
struct hisi_pcie {
- struct pcie_port pp; /* pp.dbi_base is DT rc_dbi */
+ struct dw_pcie *pci;
struct regmap *subctrl;
u32 port_id;
struct pcie_soc_ops *soc_ops;
@@ -149,10 +149,11 @@ static int hisi_pcie_cfg_read(struct pcie_port *pp, int where, int size,
u32 reg;
u32 reg_val;
void *walker = ®_val;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
walker += (where & 0x3);
reg = where & ~0x3;
- reg_val = dw_pcie_readl_rc(pp, reg);
+ reg_val = dw_pcie_readl_dbi(pci, reg);
if (size == 1)
*val = *(u8 __force *) walker;
@@ -173,19 +174,20 @@ static int hisi_pcie_cfg_write(struct pcie_port *pp, int where, int size,
u32 reg_val;
u32 reg;
void *walker = ®_val;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
walker += (where & 0x3);
reg = where & ~0x3;
if (size == 4)
- dw_pcie_writel_rc(pp, reg, val);
+ dw_pcie_writel_dbi(pci, reg, val);
else if (size == 2) {
- reg_val = dw_pcie_readl_rc(pp, reg);
+ reg_val = dw_pcie_readl_dbi(pci, reg);
*(u16 __force *) walker = val;
- dw_pcie_writel_rc(pp, reg, reg_val);
+ dw_pcie_writel_dbi(pci, reg, reg_val);
} else if (size == 1) {
- reg_val = dw_pcie_readl_rc(pp, reg);
+ reg_val = dw_pcie_readl_dbi(pci, reg);
*(u8 __force *) walker = val;
- dw_pcie_writel_rc(pp, reg, reg_val);
+ dw_pcie_writel_dbi(pci, reg, reg_val);
} else
return PCIBIOS_BAD_REGISTER_NUMBER;
@@ -204,32 +206,32 @@ static int hisi_pcie_link_up_hip05(struct hisi_pcie *hisi_pcie)
static int hisi_pcie_link_up_hip06(struct hisi_pcie *hisi_pcie)
{
- struct pcie_port *pp = &hisi_pcie->pp;
+ struct dw_pcie *pci = hisi_pcie->pci;
u32 val;
- val = dw_pcie_readl_rc(pp, PCIE_SYS_STATE4);
+ val = dw_pcie_readl_dbi(pci, PCIE_SYS_STATE4);
return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE);
}
-static int hisi_pcie_link_up(struct pcie_port *pp)
+static int hisi_pcie_link_up(struct dw_pcie *pci)
{
- struct hisi_pcie *hisi_pcie = to_hisi_pcie(pp);
+ struct hisi_pcie *hisi_pcie = to_hisi_pcie(pci);
return hisi_pcie->soc_ops->hisi_pcie_link_up(hisi_pcie);
}
-static struct pcie_host_ops hisi_pcie_host_ops = {
+static struct dw_pcie_host_ops hisi_pcie_host_ops = {
.rd_own_conf = hisi_pcie_cfg_read,
.wr_own_conf = hisi_pcie_cfg_write,
- .link_up = hisi_pcie_link_up,
};
static int hisi_add_pcie_port(struct hisi_pcie *hisi_pcie,
struct platform_device *pdev)
{
- struct pcie_port *pp = &hisi_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = hisi_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = &pdev->dev;
int ret;
u32 port_id;
@@ -254,11 +256,15 @@ static int hisi_add_pcie_port(struct hisi_pcie *hisi_pcie,
return 0;
}
+static const struct dw_pcie_ops dw_pcie_ops = {
+ .link_up = hisi_pcie_link_up,
+};
+
static int hisi_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ struct dw_pcie *pci;
struct hisi_pcie *hisi_pcie;
- struct pcie_port *pp;
const struct of_device_id *match;
struct resource *reg;
struct device_driver *driver;
@@ -268,8 +274,13 @@ static int hisi_pcie_probe(struct platform_device *pdev)
if (!hisi_pcie)
return -ENOMEM;
- pp = &hisi_pcie->pp;
- pp->dev = dev;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
+ pci->ops = &dw_pcie_ops;
+
driver = dev->driver;
match = of_match_device(driver->of_match_table, dev);
@@ -283,9 +294,9 @@ static int hisi_pcie_probe(struct platform_device *pdev)
}
reg = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rc_dbi");
- pp->dbi_base = devm_ioremap_resource(dev, reg);
- if (IS_ERR(pp->dbi_base))
- return PTR_ERR(pp->dbi_base);
+ pci->dbi_base = devm_ioremap_resource(dev, reg);
+ if (IS_ERR(pci->dbi_base))
+ return PTR_ERR(pci->dbi_base);
platform_set_drvdata(pdev, hisi_pcie);
diff --git a/drivers/pci/dwc/pcie-qcom.c b/drivers/pci/dwc/pcie-qcom.c
index d75fc02..9879977 100644
--- a/drivers/pci/dwc/pcie-qcom.c
+++ b/drivers/pci/dwc/pcie-qcom.c
@@ -103,7 +103,7 @@ struct qcom_pcie_ops {
};
struct qcom_pcie {
- struct pcie_port pp; /* pp.dbi_base is DT dbi */
+ struct dw_pcie *pci;
void __iomem *parf; /* DT parf */
void __iomem *elbi; /* DT elbi */
union qcom_pcie_resources res;
@@ -112,7 +112,7 @@ struct qcom_pcie {
struct qcom_pcie_ops *ops;
};
-#define to_qcom_pcie(x) container_of(x, struct qcom_pcie, pp)
+#define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
{
@@ -155,21 +155,23 @@ static void qcom_pcie_v2_ltssm_enable(struct qcom_pcie *pcie)
static int qcom_pcie_establish_link(struct qcom_pcie *pcie)
{
+ struct dw_pcie *pci = pcie->pci;
- if (dw_pcie_link_up(&pcie->pp))
+ if (dw_pcie_link_up(pci))
return 0;
/* Enable Link Training state machine */
if (pcie->ops->ltssm_enable)
pcie->ops->ltssm_enable(pcie);
- return dw_pcie_wait_for_link(&pcie->pp);
+ return dw_pcie_wait_for_link(pci);
}
static int qcom_pcie_get_resources_v0(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v0 *res = &pcie->res.v0;
- struct device *dev = pcie->pp.dev;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
res->vdda = devm_regulator_get(dev, "vdda");
if (IS_ERR(res->vdda))
@@ -221,7 +223,8 @@ static int qcom_pcie_get_resources_v0(struct qcom_pcie *pcie)
static int qcom_pcie_get_resources_v1(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v1 *res = &pcie->res.v1;
- struct device *dev = pcie->pp.dev;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
res->vdda = devm_regulator_get(dev, "vdda");
if (IS_ERR(res->vdda))
@@ -270,7 +273,8 @@ static void qcom_pcie_deinit_v0(struct qcom_pcie *pcie)
static int qcom_pcie_init_v0(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v0 *res = &pcie->res.v0;
- struct device *dev = pcie->pp.dev;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
u32 val;
int ret;
@@ -392,7 +396,8 @@ static void qcom_pcie_deinit_v1(struct qcom_pcie *pcie)
static int qcom_pcie_init_v1(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v1 *res = &pcie->res.v1;
- struct device *dev = pcie->pp.dev;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
int ret;
ret = reset_control_deassert(res->core);
@@ -459,7 +464,8 @@ static int qcom_pcie_init_v1(struct qcom_pcie *pcie)
static int qcom_pcie_get_resources_v2(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v2 *res = &pcie->res.v2;
- struct device *dev = pcie->pp.dev;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
res->aux_clk = devm_clk_get(dev, "aux");
if (IS_ERR(res->aux_clk))
@@ -487,7 +493,8 @@ static int qcom_pcie_get_resources_v2(struct qcom_pcie *pcie)
static int qcom_pcie_init_v2(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v2 *res = &pcie->res.v2;
- struct device *dev = pcie->pp.dev;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
u32 val;
int ret;
@@ -551,7 +558,8 @@ static int qcom_pcie_init_v2(struct qcom_pcie *pcie)
static int qcom_pcie_post_init_v2(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v2 *res = &pcie->res.v2;
- struct device *dev = pcie->pp.dev;
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
int ret;
ret = clk_prepare_enable(res->pipe_clk);
@@ -563,10 +571,9 @@ static int qcom_pcie_post_init_v2(struct qcom_pcie *pcie)
return 0;
}
-static int qcom_pcie_link_up(struct pcie_port *pp)
+static int qcom_pcie_link_up(struct dw_pcie *pci)
{
- struct qcom_pcie *pcie = to_qcom_pcie(pp);
- u16 val = readw(pcie->pp.dbi_base + PCIE20_CAP + PCI_EXP_LNKSTA);
+ u16 val = readw(pci->dbi_base + PCIE20_CAP + PCI_EXP_LNKSTA);
return !!(val & PCI_EXP_LNKSTA_DLLLA);
}
@@ -584,7 +591,8 @@ static void qcom_pcie_deinit_v2(struct qcom_pcie *pcie)
static void qcom_pcie_host_init(struct pcie_port *pp)
{
- struct qcom_pcie *pcie = to_qcom_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct qcom_pcie *pcie = to_qcom_pcie(pci);
int ret;
qcom_ep_reset_assert(pcie);
@@ -622,19 +630,20 @@ static void qcom_pcie_host_init(struct pcie_port *pp)
static int qcom_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
u32 *val)
{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
/* the device class is not reported correctly from the register */
if (where == PCI_CLASS_REVISION && size == 4) {
- *val = readl(pp->dbi_base + PCI_CLASS_REVISION);
+ *val = readl(pci->dbi_base + PCI_CLASS_REVISION);
*val &= 0xff; /* keep revision id */
*val |= PCI_CLASS_BRIDGE_PCI << 16;
return PCIBIOS_SUCCESSFUL;
}
- return dw_pcie_read(pp->dbi_base + where, size, val);
+ return dw_pcie_read(pci->dbi_base + where, size, val);
}
-static struct pcie_host_ops qcom_pcie_dw_ops = {
- .link_up = qcom_pcie_link_up,
+static struct dw_pcie_host_ops qcom_pcie_dw_ops = {
.host_init = qcom_pcie_host_init,
.rd_own_conf = qcom_pcie_rd_own_conf,
};
@@ -661,19 +670,31 @@ static int qcom_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
.ltssm_enable = qcom_pcie_v2_ltssm_enable,
};
+static const struct dw_pcie_ops dw_pcie_ops = {
+ .link_up = qcom_pcie_link_up,
+};
+
static int qcom_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
- struct qcom_pcie *pcie;
struct pcie_port *pp;
+ struct dw_pcie *pci;
+ struct qcom_pcie *pcie;
int ret;
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
return -ENOMEM;
- pp = &pcie->pp;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
+ pci->ops = &dw_pcie_ops;
+ pp = &pci->pp;
+
pcie->ops = (struct qcom_pcie_ops *)of_device_get_match_data(dev);
pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_LOW);
@@ -686,9 +707,9 @@ static int qcom_pcie_probe(struct platform_device *pdev)
return PTR_ERR(pcie->parf);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
- pp->dbi_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(pp->dbi_base))
- return PTR_ERR(pp->dbi_base);
+ pci->dbi_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(pci->dbi_base))
+ return PTR_ERR(pci->dbi_base);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "elbi");
pcie->elbi = devm_ioremap_resource(dev, res);
@@ -699,7 +720,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
if (IS_ERR(pcie->phy))
return PTR_ERR(pcie->phy);
- pp->dev = dev;
ret = pcie->ops->get_resources(pcie);
if (ret)
return ret;
diff --git a/drivers/pci/dwc/pcie-spear13xx.c b/drivers/pci/dwc/pcie-spear13xx.c
index 7acf91e..348f9c5 100644
--- a/drivers/pci/dwc/pcie-spear13xx.c
+++ b/drivers/pci/dwc/pcie-spear13xx.c
@@ -25,7 +25,7 @@
#include "pcie-designware.h"
struct spear13xx_pcie {
- struct pcie_port pp; /* DT dbi is pp.dbi_base */
+ struct dw_pcie *pci;
void __iomem *app_base;
struct phy *phy;
struct clk *clk;
@@ -70,17 +70,18 @@ struct pcie_app_reg {
#define EXP_CAP_ID_OFFSET 0x70
-#define to_spear13xx_pcie(x) container_of(x, struct spear13xx_pcie, pp)
+#define to_spear13xx_pcie(x) dev_get_drvdata((x)->dev)
static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
{
- struct pcie_port *pp = &spear13xx_pcie->pp;
+ struct dw_pcie *pci = spear13xx_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
u32 val;
u32 exp_cap_off = EXP_CAP_ID_OFFSET;
- if (dw_pcie_link_up(pp)) {
- dev_err(pp->dev, "link already up\n");
+ if (dw_pcie_link_up(pci)) {
+ dev_err(pci->dev, "link already up\n");
return 0;
}
@@ -91,33 +92,33 @@ static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
* default value in capability register is 512 bytes. So force
* it to 128 here.
*/
- dw_pcie_read(pp->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, &val);
+ dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, &val);
val &= ~PCI_EXP_DEVCTL_READRQ;
- dw_pcie_write(pp->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, val);
+ dw_pcie_write(pci->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, val);
- dw_pcie_write(pp->dbi_base + PCI_VENDOR_ID, 2, 0x104A);
- dw_pcie_write(pp->dbi_base + PCI_DEVICE_ID, 2, 0xCD80);
+ dw_pcie_write(pci->dbi_base + PCI_VENDOR_ID, 2, 0x104A);
+ dw_pcie_write(pci->dbi_base + PCI_DEVICE_ID, 2, 0xCD80);
/*
* if is_gen1 is set then handle it, so that some buggy card
* also works
*/
if (spear13xx_pcie->is_gen1) {
- dw_pcie_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
+ dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
4, &val);
if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
val &= ~((u32)PCI_EXP_LNKCAP_SLS);
val |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pp->dbi_base + exp_cap_off +
+ dw_pcie_write(pci->dbi_base + exp_cap_off +
PCI_EXP_LNKCAP, 4, val);
}
- dw_pcie_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
+ dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
2, &val);
if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
val &= ~((u32)PCI_EXP_LNKCAP_SLS);
val |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pp->dbi_base + exp_cap_off +
+ dw_pcie_write(pci->dbi_base + exp_cap_off +
PCI_EXP_LNKCTL2, 2, val);
}
}
@@ -128,14 +129,15 @@ static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
| ((u32)1 << REG_TRANSLATION_ENABLE),
&app_reg->app_ctrl_0);
- return dw_pcie_wait_for_link(pp);
+ return dw_pcie_wait_for_link(pci);
}
static irqreturn_t spear13xx_pcie_irq_handler(int irq, void *arg)
{
struct spear13xx_pcie *spear13xx_pcie = arg;
struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
- struct pcie_port *pp = &spear13xx_pcie->pp;
+ struct dw_pcie *pci = spear13xx_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
unsigned int status;
status = readl(&app_reg->int_sts);
@@ -152,7 +154,8 @@ static irqreturn_t spear13xx_pcie_irq_handler(int irq, void *arg)
static void spear13xx_pcie_enable_interrupts(struct spear13xx_pcie *spear13xx_pcie)
{
- struct pcie_port *pp = &spear13xx_pcie->pp;
+ struct dw_pcie *pci = spear13xx_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
/* Enable MSI interrupt */
@@ -163,9 +166,9 @@ static void spear13xx_pcie_enable_interrupts(struct spear13xx_pcie *spear13xx_pc
}
}
-static int spear13xx_pcie_link_up(struct pcie_port *pp)
+static int spear13xx_pcie_link_up(struct dw_pcie *pci)
{
- struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp);
+ struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pci);
struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
if (readl(&app_reg->app_status_1) & XMLH_LINK_UP)
@@ -176,22 +179,23 @@ static int spear13xx_pcie_link_up(struct pcie_port *pp)
static void spear13xx_pcie_host_init(struct pcie_port *pp)
{
- struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pci);
spear13xx_pcie_establish_link(spear13xx_pcie);
spear13xx_pcie_enable_interrupts(spear13xx_pcie);
}
-static struct pcie_host_ops spear13xx_pcie_host_ops = {
- .link_up = spear13xx_pcie_link_up,
+static struct dw_pcie_host_ops spear13xx_pcie_host_ops = {
.host_init = spear13xx_pcie_host_init,
};
static int spear13xx_add_pcie_port(struct spear13xx_pcie *spear13xx_pcie,
struct platform_device *pdev)
{
- struct pcie_port *pp = &spear13xx_pcie->pp;
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = spear13xx_pcie->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = &pdev->dev;
int ret;
pp->irq = platform_get_irq(pdev, 0);
@@ -219,11 +223,15 @@ static int spear13xx_add_pcie_port(struct spear13xx_pcie *spear13xx_pcie,
return 0;
}
+static const struct dw_pcie_ops dw_pcie_ops = {
+ .link_up = spear13xx_pcie_link_up,
+};
+
static int spear13xx_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ struct dw_pcie *pci;
struct spear13xx_pcie *spear13xx_pcie;
- struct pcie_port *pp;
struct device_node *np = dev->of_node;
struct resource *dbi_base;
int ret;
@@ -232,6 +240,13 @@ static int spear13xx_pcie_probe(struct platform_device *pdev)
if (!spear13xx_pcie)
return -ENOMEM;
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
+ pci->ops = &dw_pcie_ops;
+
spear13xx_pcie->phy = devm_phy_get(dev, "pcie-phy");
if (IS_ERR(spear13xx_pcie->phy)) {
ret = PTR_ERR(spear13xx_pcie->phy);
@@ -255,17 +270,14 @@ static int spear13xx_pcie_probe(struct platform_device *pdev)
return ret;
}
- pp = &spear13xx_pcie->pp;
- pp->dev = dev;
-
dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
- pp->dbi_base = devm_ioremap_resource(dev, dbi_base);
- if (IS_ERR(pp->dbi_base)) {
+ pci->dbi_base = devm_ioremap_resource(dev, dbi_base);
+ if (IS_ERR(pci->dbi_base)) {
dev_err(dev, "couldn't remap dbi base %p\n", dbi_base);
- ret = PTR_ERR(pp->dbi_base);
+ ret = PTR_ERR(pci->dbi_base);
goto fail_clk;
}
- spear13xx_pcie->app_base = pp->dbi_base + 0x2000;
+ spear13xx_pcie->app_base = pci->dbi_base + 0x2000;
if (of_property_read_bool(np, "st,pcie-is-gen1"))
spear13xx_pcie->is_gen1 = true;
--
1.7.9.5
^ permalink raw reply related
* [PATCH 07/37] PCI: dwc: designware: Get device pointer at the start of dw_pcie_host_init
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
No functional change. Get device pointer at the beginning of
dw_pcie_host_init instead of getting it all over dw_pcie_host_init.
This is in preparation for splitting struct pcie_port into host and
core structures (Once split pcie_port will not have device pointer).
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/pcie-designware.c | 33 +++++++++++++++++----------------
1 file changed, 17 insertions(+), 16 deletions(-)
diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index d0ea310..330596b 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -449,8 +449,9 @@ static u8 dw_pcie_iatu_unroll_enabled(struct pcie_port *pp)
int dw_pcie_host_init(struct pcie_port *pp)
{
- struct device_node *np = pp->dev->of_node;
- struct platform_device *pdev = to_platform_device(pp->dev);
+ struct device *dev = pp->dev;
+ struct device_node *np = dev->of_node;
+ struct platform_device *pdev = to_platform_device(dev);
struct pci_bus *bus, *child;
struct resource *cfg_res;
int i, ret;
@@ -464,14 +465,14 @@ int dw_pcie_host_init(struct pcie_port *pp)
pp->cfg0_base = cfg_res->start;
pp->cfg1_base = cfg_res->start + pp->cfg0_size;
} else if (!pp->va_cfg0_base) {
- dev_err(pp->dev, "missing *config* reg space\n");
+ dev_err(dev, "missing *config* reg space\n");
}
ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp->io_base);
if (ret)
return ret;
- ret = devm_request_pci_bus_resources(&pdev->dev, &res);
+ ret = devm_request_pci_bus_resources(dev, &res);
if (ret)
goto error;
@@ -481,7 +482,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
case IORESOURCE_IO:
ret = pci_remap_iospace(win->res, pp->io_base);
if (ret) {
- dev_warn(pp->dev, "error %d: failed to map resource %pR\n",
+ dev_warn(dev, "error %d: failed to map resource %pR\n",
ret, win->res);
resource_list_destroy_entry(win);
} else {
@@ -511,10 +512,10 @@ int dw_pcie_host_init(struct pcie_port *pp)
}
if (!pp->dbi_base) {
- pp->dbi_base = devm_ioremap(pp->dev, pp->cfg->start,
+ pp->dbi_base = devm_ioremap(dev, pp->cfg->start,
resource_size(pp->cfg));
if (!pp->dbi_base) {
- dev_err(pp->dev, "error with ioremap\n");
+ dev_err(dev, "error with ioremap\n");
ret = -ENOMEM;
goto error;
}
@@ -523,20 +524,20 @@ int dw_pcie_host_init(struct pcie_port *pp)
pp->mem_base = pp->mem->start;
if (!pp->va_cfg0_base) {
- pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base,
+ pp->va_cfg0_base = devm_ioremap(dev, pp->cfg0_base,
pp->cfg0_size);
if (!pp->va_cfg0_base) {
- dev_err(pp->dev, "error with ioremap in function\n");
+ dev_err(dev, "error with ioremap in function\n");
ret = -ENOMEM;
goto error;
}
}
if (!pp->va_cfg1_base) {
- pp->va_cfg1_base = devm_ioremap(pp->dev, pp->cfg1_base,
+ pp->va_cfg1_base = devm_ioremap(dev, pp->cfg1_base,
pp->cfg1_size);
if (!pp->va_cfg1_base) {
- dev_err(pp->dev, "error with ioremap\n");
+ dev_err(dev, "error with ioremap\n");
ret = -ENOMEM;
goto error;
}
@@ -552,11 +553,11 @@ int dw_pcie_host_init(struct pcie_port *pp)
if (IS_ENABLED(CONFIG_PCI_MSI)) {
if (!pp->ops->msi_host_init) {
- pp->irq_domain = irq_domain_add_linear(pp->dev->of_node,
+ pp->irq_domain = irq_domain_add_linear(dev->of_node,
MAX_MSI_IRQS, &msi_domain_ops,
&dw_pcie_msi_chip);
if (!pp->irq_domain) {
- dev_err(pp->dev, "irq domain init failed\n");
+ dev_err(dev, "irq domain init failed\n");
ret = -ENXIO;
goto error;
}
@@ -575,12 +576,12 @@ int dw_pcie_host_init(struct pcie_port *pp)
pp->root_bus_nr = pp->busn->start;
if (IS_ENABLED(CONFIG_PCI_MSI)) {
- bus = pci_scan_root_bus_msi(pp->dev, pp->root_bus_nr,
+ bus = pci_scan_root_bus_msi(dev, pp->root_bus_nr,
&dw_pcie_ops, pp, &res,
&dw_pcie_msi_chip);
- dw_pcie_msi_chip.dev = pp->dev;
+ dw_pcie_msi_chip.dev = dev;
} else
- bus = pci_scan_root_bus(pp->dev, pp->root_bus_nr, &dw_pcie_ops,
+ bus = pci_scan_root_bus(dev, pp->root_bus_nr, &dw_pcie_ops,
pp, &res);
if (!bus) {
ret = -ENOMEM;
--
1.7.9.5
^ permalink raw reply related
* [PATCH 06/37] PCI: dwc: Rename cfg_read/cfg_write to read/write
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
No functional change. dw_pcie_cfg_read/dw_pcie_cfg_write doesn't do
anything specific to access configuration space. It can be just renamed
to dw_pcie_read/dw_pcie_write and used to read/write data to dbi space.
This is in preparation for added endpoint support to linux kernel.
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Joao Pinto <Joao.Pinto@synopsys.com>
Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/pci-dra7xx.c | 16 ++++++++--------
drivers/pci/dwc/pci-exynos.c | 4 ++--
drivers/pci/dwc/pci-keystone-dw.c | 4 ++--
drivers/pci/dwc/pcie-designware.c | 12 ++++++------
drivers/pci/dwc/pcie-designware.h | 4 ++--
drivers/pci/dwc/pcie-qcom.c | 2 +-
drivers/pci/dwc/pcie-spear13xx.c | 24 ++++++++++++------------
7 files changed, 33 insertions(+), 33 deletions(-)
diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c
index aeeab74..38b0c9a 100644
--- a/drivers/pci/dwc/pci-dra7xx.c
+++ b/drivers/pci/dwc/pci-dra7xx.c
@@ -114,22 +114,22 @@ static int dra7xx_pcie_establish_link(struct dra7xx_pcie *dra7xx)
}
if (dra7xx->link_gen == 1) {
- dw_pcie_cfg_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
- 4, ®);
+ dw_pcie_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
+ 4, ®);
if ((reg & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
reg &= ~((u32)PCI_EXP_LNKCAP_SLS);
reg |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_cfg_write(pp->dbi_base + exp_cap_off +
- PCI_EXP_LNKCAP, 4, reg);
+ dw_pcie_write(pp->dbi_base + exp_cap_off +
+ PCI_EXP_LNKCAP, 4, reg);
}
- dw_pcie_cfg_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
- 2, ®);
+ dw_pcie_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
+ 2, ®);
if ((reg & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
reg &= ~((u32)PCI_EXP_LNKCAP_SLS);
reg |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_cfg_write(pp->dbi_base + exp_cap_off +
- PCI_EXP_LNKCTL2, 2, reg);
+ dw_pcie_write(pp->dbi_base + exp_cap_off +
+ PCI_EXP_LNKCTL2, 2, reg);
}
}
diff --git a/drivers/pci/dwc/pci-exynos.c b/drivers/pci/dwc/pci-exynos.c
index c179e7a..e3fbff4 100644
--- a/drivers/pci/dwc/pci-exynos.c
+++ b/drivers/pci/dwc/pci-exynos.c
@@ -429,7 +429,7 @@ static int exynos_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
int ret;
exynos_pcie_sideband_dbi_r_mode(exynos_pcie, true);
- ret = dw_pcie_cfg_read(pp->dbi_base + where, size, val);
+ ret = dw_pcie_read(pp->dbi_base + where, size, val);
exynos_pcie_sideband_dbi_r_mode(exynos_pcie, false);
return ret;
}
@@ -441,7 +441,7 @@ static int exynos_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
int ret;
exynos_pcie_sideband_dbi_w_mode(exynos_pcie, true);
- ret = dw_pcie_cfg_write(pp->dbi_base + where, size, val);
+ ret = dw_pcie_write(pp->dbi_base + where, size, val);
exynos_pcie_sideband_dbi_w_mode(exynos_pcie, false);
return ret;
}
diff --git a/drivers/pci/dwc/pci-keystone-dw.c b/drivers/pci/dwc/pci-keystone-dw.c
index 9397c46..4875334 100644
--- a/drivers/pci/dwc/pci-keystone-dw.c
+++ b/drivers/pci/dwc/pci-keystone-dw.c
@@ -444,7 +444,7 @@ int ks_dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
addr = ks_pcie_cfg_setup(ks_pcie, bus_num, devfn);
- return dw_pcie_cfg_read(addr + where, size, val);
+ return dw_pcie_read(addr + where, size, val);
}
int ks_dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
@@ -456,7 +456,7 @@ int ks_dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
addr = ks_pcie_cfg_setup(ks_pcie, bus_num, devfn);
- return dw_pcie_cfg_write(addr + where, size, val);
+ return dw_pcie_write(addr + where, size, val);
}
/**
diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index 0b928dc..d0ea310 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -33,7 +33,7 @@
static struct pci_ops dw_pcie_ops;
-int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val)
+int dw_pcie_read(void __iomem *addr, int size, u32 *val)
{
if ((uintptr_t)addr & (size - 1)) {
*val = 0;
@@ -54,7 +54,7 @@ int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val)
return PCIBIOS_SUCCESSFUL;
}
-int dw_pcie_cfg_write(void __iomem *addr, int size, u32 val)
+int dw_pcie_write(void __iomem *addr, int size, u32 val)
{
if ((uintptr_t)addr & (size - 1))
return PCIBIOS_BAD_REGISTER_NUMBER;
@@ -108,7 +108,7 @@ static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
if (pp->ops->rd_own_conf)
return pp->ops->rd_own_conf(pp, where, size, val);
- return dw_pcie_cfg_read(pp->dbi_base + where, size, val);
+ return dw_pcie_read(pp->dbi_base + where, size, val);
}
static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
@@ -117,7 +117,7 @@ static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
if (pp->ops->wr_own_conf)
return pp->ops->wr_own_conf(pp, where, size, val);
- return dw_pcie_cfg_write(pp->dbi_base + where, size, val);
+ return dw_pcie_write(pp->dbi_base + where, size, val);
}
static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
@@ -638,7 +638,7 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
type, cpu_addr,
busdev, cfg_size);
- ret = dw_pcie_cfg_read(va_cfg_base + where, size, val);
+ ret = dw_pcie_read(va_cfg_base + where, size, val);
if (pp->num_viewport <= 2)
dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
PCIE_ATU_TYPE_IO, pp->io_base,
@@ -676,7 +676,7 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
type, cpu_addr,
busdev, cfg_size);
- ret = dw_pcie_cfg_write(va_cfg_base + where, size, val);
+ ret = dw_pcie_write(va_cfg_base + where, size, val);
if (pp->num_viewport <= 2)
dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
PCIE_ATU_TYPE_IO, pp->io_base,
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index a6cf9262..b6ddb05 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -146,8 +146,8 @@ struct pcie_host_ops {
u32 dw_pcie_readl_rc(struct pcie_port *pp, u32 reg);
void dw_pcie_writel_rc(struct pcie_port *pp, u32 reg, u32 val);
-int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val);
-int dw_pcie_cfg_write(void __iomem *addr, int size, u32 val);
+int dw_pcie_read(void __iomem *addr, int size, u32 *val);
+int dw_pcie_write(void __iomem *addr, int size, u32 val);
irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
void dw_pcie_msi_init(struct pcie_port *pp);
int dw_pcie_wait_for_link(struct pcie_port *pp);
diff --git a/drivers/pci/dwc/pcie-qcom.c b/drivers/pci/dwc/pcie-qcom.c
index 2c24c45..d75fc02 100644
--- a/drivers/pci/dwc/pcie-qcom.c
+++ b/drivers/pci/dwc/pcie-qcom.c
@@ -630,7 +630,7 @@ static int qcom_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
return PCIBIOS_SUCCESSFUL;
}
- return dw_pcie_cfg_read(pp->dbi_base + where, size, val);
+ return dw_pcie_read(pp->dbi_base + where, size, val);
}
static struct pcie_host_ops qcom_pcie_dw_ops = {
diff --git a/drivers/pci/dwc/pcie-spear13xx.c b/drivers/pci/dwc/pcie-spear13xx.c
index 5970566..7acf91e 100644
--- a/drivers/pci/dwc/pcie-spear13xx.c
+++ b/drivers/pci/dwc/pcie-spear13xx.c
@@ -91,34 +91,34 @@ static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
* default value in capability register is 512 bytes. So force
* it to 128 here.
*/
- dw_pcie_cfg_read(pp->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, &val);
+ dw_pcie_read(pp->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, &val);
val &= ~PCI_EXP_DEVCTL_READRQ;
- dw_pcie_cfg_write(pp->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, val);
+ dw_pcie_write(pp->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, val);
- dw_pcie_cfg_write(pp->dbi_base + PCI_VENDOR_ID, 2, 0x104A);
- dw_pcie_cfg_write(pp->dbi_base + PCI_DEVICE_ID, 2, 0xCD80);
+ dw_pcie_write(pp->dbi_base + PCI_VENDOR_ID, 2, 0x104A);
+ dw_pcie_write(pp->dbi_base + PCI_DEVICE_ID, 2, 0xCD80);
/*
* if is_gen1 is set then handle it, so that some buggy card
* also works
*/
if (spear13xx_pcie->is_gen1) {
- dw_pcie_cfg_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
- 4, &val);
+ dw_pcie_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
+ 4, &val);
if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
val &= ~((u32)PCI_EXP_LNKCAP_SLS);
val |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_cfg_write(pp->dbi_base + exp_cap_off +
- PCI_EXP_LNKCAP, 4, val);
+ dw_pcie_write(pp->dbi_base + exp_cap_off +
+ PCI_EXP_LNKCAP, 4, val);
}
- dw_pcie_cfg_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
- 2, &val);
+ dw_pcie_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
+ 2, &val);
if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
val &= ~((u32)PCI_EXP_LNKCAP_SLS);
val |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_cfg_write(pp->dbi_base + exp_cap_off +
- PCI_EXP_LNKCTL2, 2, val);
+ dw_pcie_write(pp->dbi_base + exp_cap_off +
+ PCI_EXP_LNKCTL2, 2, val);
}
}
--
1.7.9.5
^ permalink raw reply related
* [PATCH 05/37] PCI: dwc: Add platform_set_drvdata
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
Add platform_set_drvdata in all designware based drivers to store the
private data structure of the driver so that dev_set_drvdata can be
used to get back private data pointer in add_pcie_port/host_init.
This is in preparation for splitting struct pcie_port into core and
host only structures. After the split pcie_port will not be part of
the driver's private data structure and *container_of* used now
to get the private data pointer cannot be used.
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Minghuan Lian <minghuan.Lian@freescale.com>
Cc: Mingkai Hu <mingkai.hu@freescale.com>
Cc: Roy Zang <tie-fei.zang@freescale.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Niklas Cassel <niklas.cassel@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Joao Pinto <Joao.Pinto@synopsys.com>
Cc: Zhou Wang <wangzhou1@hisilicon.com>
Cc: Gabriele Paoloni <gabriele.paoloni@huawei.com>
Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/pci-dra7xx.c | 3 ++-
drivers/pci/dwc/pci-exynos.c | 3 ++-
drivers/pci/dwc/pci-imx6.c | 3 ++-
drivers/pci/dwc/pci-keystone.c | 2 ++
drivers/pci/dwc/pci-layerscape.c | 2 ++
drivers/pci/dwc/pcie-armada8k.c | 2 ++
drivers/pci/dwc/pcie-artpec6.c | 2 ++
drivers/pci/dwc/pcie-designware-plat.c | 2 ++
drivers/pci/dwc/pcie-hisi.c | 2 ++
drivers/pci/dwc/pcie-qcom.c | 2 ++
drivers/pci/dwc/pcie-spear13xx.c | 3 ++-
11 files changed, 22 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c
index 2073d46..aeeab74 100644
--- a/drivers/pci/dwc/pci-dra7xx.c
+++ b/drivers/pci/dwc/pci-dra7xx.c
@@ -433,6 +433,8 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
return ret;
}
+ platform_set_drvdata(pdev, dra7xx);
+
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
@@ -459,7 +461,6 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
if (ret < 0)
goto err_gpio;
- platform_set_drvdata(pdev, dra7xx);
return 0;
err_gpio:
diff --git a/drivers/pci/dwc/pci-exynos.c b/drivers/pci/dwc/pci-exynos.c
index f1c544b..c179e7a 100644
--- a/drivers/pci/dwc/pci-exynos.c
+++ b/drivers/pci/dwc/pci-exynos.c
@@ -583,11 +583,12 @@ static int __init exynos_pcie_probe(struct platform_device *pdev)
goto fail_bus_clk;
}
+ platform_set_drvdata(pdev, exynos_pcie);
+
ret = exynos_add_pcie_port(exynos_pcie, pdev);
if (ret < 0)
goto fail_bus_clk;
- platform_set_drvdata(pdev, exynos_pcie);
return 0;
fail_bus_clk:
diff --git a/drivers/pci/dwc/pci-imx6.c b/drivers/pci/dwc/pci-imx6.c
index c8cefb0..6e5d06f 100644
--- a/drivers/pci/dwc/pci-imx6.c
+++ b/drivers/pci/dwc/pci-imx6.c
@@ -719,11 +719,12 @@ static int __init imx6_pcie_probe(struct platform_device *pdev)
if (ret)
imx6_pcie->link_gen = 1;
+ platform_set_drvdata(pdev, imx6_pcie);
+
ret = imx6_add_pcie_port(imx6_pcie, pdev);
if (ret < 0)
return ret;
- platform_set_drvdata(pdev, imx6_pcie);
return 0;
}
diff --git a/drivers/pci/dwc/pci-keystone.c b/drivers/pci/dwc/pci-keystone.c
index 043c19a..4c7ba35 100644
--- a/drivers/pci/dwc/pci-keystone.c
+++ b/drivers/pci/dwc/pci-keystone.c
@@ -422,6 +422,8 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
if (ret)
return ret;
+ platform_set_drvdata(pdev, ks_pcie);
+
ret = ks_add_pcie_port(ks_pcie, pdev);
if (ret < 0)
goto fail_clk;
diff --git a/drivers/pci/dwc/pci-layerscape.c b/drivers/pci/dwc/pci-layerscape.c
index ea78913..89e8817 100644
--- a/drivers/pci/dwc/pci-layerscape.c
+++ b/drivers/pci/dwc/pci-layerscape.c
@@ -268,6 +268,8 @@ static int __init ls_pcie_probe(struct platform_device *pdev)
if (!ls_pcie_is_bridge(pcie))
return -ENODEV;
+ platform_set_drvdata(pdev, pcie);
+
ret = ls_add_pcie_port(pcie);
if (ret < 0)
return ret;
diff --git a/drivers/pci/dwc/pcie-armada8k.c b/drivers/pci/dwc/pcie-armada8k.c
index 0ac0f18..5a28dcb 100644
--- a/drivers/pci/dwc/pcie-armada8k.c
+++ b/drivers/pci/dwc/pcie-armada8k.c
@@ -226,6 +226,8 @@ static int armada8k_pcie_probe(struct platform_device *pdev)
goto fail;
}
+ platform_set_drvdata(pdev, pcie);
+
ret = armada8k_add_pcie_port(pcie, pdev);
if (ret)
goto fail;
diff --git a/drivers/pci/dwc/pcie-artpec6.c b/drivers/pci/dwc/pcie-artpec6.c
index 212786b..187a98d 100644
--- a/drivers/pci/dwc/pcie-artpec6.c
+++ b/drivers/pci/dwc/pcie-artpec6.c
@@ -261,6 +261,8 @@ static int artpec6_pcie_probe(struct platform_device *pdev)
if (IS_ERR(artpec6_pcie->regmap))
return PTR_ERR(artpec6_pcie->regmap);
+ platform_set_drvdata(pdev, artpec6_pcie);
+
ret = artpec6_add_pcie_port(artpec6_pcie, pdev);
if (ret < 0)
return ret;
diff --git a/drivers/pci/dwc/pcie-designware-plat.c b/drivers/pci/dwc/pcie-designware-plat.c
index 1a02038..bb58540 100644
--- a/drivers/pci/dwc/pcie-designware-plat.c
+++ b/drivers/pci/dwc/pcie-designware-plat.c
@@ -104,6 +104,8 @@ static int dw_plat_pcie_probe(struct platform_device *pdev)
if (IS_ERR(pp->dbi_base))
return PTR_ERR(pp->dbi_base);
+ platform_set_drvdata(pdev, dw_plat_pcie);
+
ret = dw_plat_add_pcie_port(pp, pdev);
if (ret < 0)
return ret;
diff --git a/drivers/pci/dwc/pcie-hisi.c b/drivers/pci/dwc/pcie-hisi.c
index a301a71..ecc1b08 100644
--- a/drivers/pci/dwc/pcie-hisi.c
+++ b/drivers/pci/dwc/pcie-hisi.c
@@ -287,6 +287,8 @@ static int hisi_pcie_probe(struct platform_device *pdev)
if (IS_ERR(pp->dbi_base))
return PTR_ERR(pp->dbi_base);
+ platform_set_drvdata(pdev, hisi_pcie);
+
ret = hisi_add_pcie_port(hisi_pcie, pdev);
if (ret)
return ret;
diff --git a/drivers/pci/dwc/pcie-qcom.c b/drivers/pci/dwc/pcie-qcom.c
index 734ba0d..2c24c45 100644
--- a/drivers/pci/dwc/pcie-qcom.c
+++ b/drivers/pci/dwc/pcie-qcom.c
@@ -725,6 +725,8 @@ static int qcom_pcie_probe(struct platform_device *pdev)
if (ret)
return ret;
+ platform_set_drvdata(pdev, pcie);
+
ret = dw_pcie_host_init(pp);
if (ret) {
dev_err(dev, "cannot initialize host\n");
diff --git a/drivers/pci/dwc/pcie-spear13xx.c b/drivers/pci/dwc/pcie-spear13xx.c
index dafe8b8..5970566 100644
--- a/drivers/pci/dwc/pcie-spear13xx.c
+++ b/drivers/pci/dwc/pcie-spear13xx.c
@@ -270,11 +270,12 @@ static int spear13xx_pcie_probe(struct platform_device *pdev)
if (of_property_read_bool(np, "st,pcie-is-gen1"))
spear13xx_pcie->is_gen1 = true;
+ platform_set_drvdata(pdev, spear13xx_pcie);
+
ret = spear13xx_add_pcie_port(spear13xx_pcie, pdev);
if (ret < 0)
goto fail_clk;
- platform_set_drvdata(pdev, spear13xx_pcie);
return 0;
fail_clk:
--
1.7.9.5
^ permalink raw reply related
* [PATCH 04/37] PCI: dwc: designware: Move the register defines to designware header file
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
No functional change. Move the register defines and other macros from
pcie-designware.c to pcie-designware.h. This is in preparation to
split the pcie-designware.c file into designware core file and host
specific file.
While at that also fix a checkpatch warning.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/pcie-designware.c | 70 ------------------------------------
drivers/pci/dwc/pcie-designware.h | 71 +++++++++++++++++++++++++++++++++++++
2 files changed, 71 insertions(+), 70 deletions(-)
diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index d68bc7b..0b928dc 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -25,76 +25,6 @@
#include "pcie-designware.h"
-/* Parameters for the waiting for link up routine */
-#define LINK_WAIT_MAX_RETRIES 10
-#define LINK_WAIT_USLEEP_MIN 90000
-#define LINK_WAIT_USLEEP_MAX 100000
-
-/* Parameters for the waiting for iATU enabled routine */
-#define LINK_WAIT_MAX_IATU_RETRIES 5
-#define LINK_WAIT_IATU_MIN 9000
-#define LINK_WAIT_IATU_MAX 10000
-
-/* Synopsys-specific PCIe configuration registers */
-#define PCIE_PORT_LINK_CONTROL 0x710
-#define PORT_LINK_MODE_MASK (0x3f << 16)
-#define PORT_LINK_MODE_1_LANES (0x1 << 16)
-#define PORT_LINK_MODE_2_LANES (0x3 << 16)
-#define PORT_LINK_MODE_4_LANES (0x7 << 16)
-#define PORT_LINK_MODE_8_LANES (0xf << 16)
-
-#define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
-#define PORT_LOGIC_SPEED_CHANGE (0x1 << 17)
-#define PORT_LOGIC_LINK_WIDTH_MASK (0x1f << 8)
-#define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8)
-#define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8)
-#define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8)
-#define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8)
-
-#define PCIE_MSI_ADDR_LO 0x820
-#define PCIE_MSI_ADDR_HI 0x824
-#define PCIE_MSI_INTR0_ENABLE 0x828
-#define PCIE_MSI_INTR0_MASK 0x82C
-#define PCIE_MSI_INTR0_STATUS 0x830
-
-#define PCIE_ATU_VIEWPORT 0x900
-#define PCIE_ATU_REGION_INBOUND (0x1 << 31)
-#define PCIE_ATU_REGION_OUTBOUND (0x0 << 31)
-#define PCIE_ATU_REGION_INDEX2 (0x2 << 0)
-#define PCIE_ATU_REGION_INDEX1 (0x1 << 0)
-#define PCIE_ATU_REGION_INDEX0 (0x0 << 0)
-#define PCIE_ATU_CR1 0x904
-#define PCIE_ATU_TYPE_MEM (0x0 << 0)
-#define PCIE_ATU_TYPE_IO (0x2 << 0)
-#define PCIE_ATU_TYPE_CFG0 (0x4 << 0)
-#define PCIE_ATU_TYPE_CFG1 (0x5 << 0)
-#define PCIE_ATU_CR2 0x908
-#define PCIE_ATU_ENABLE (0x1 << 31)
-#define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30)
-#define PCIE_ATU_LOWER_BASE 0x90C
-#define PCIE_ATU_UPPER_BASE 0x910
-#define PCIE_ATU_LIMIT 0x914
-#define PCIE_ATU_LOWER_TARGET 0x918
-#define PCIE_ATU_BUS(x) (((x) & 0xff) << 24)
-#define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19)
-#define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
-#define PCIE_ATU_UPPER_TARGET 0x91C
-
-/*
- * iATU Unroll-specific register definitions
- * From 4.80 core version the address translation will be made by unroll
- */
-#define PCIE_ATU_UNR_REGION_CTRL1 0x00
-#define PCIE_ATU_UNR_REGION_CTRL2 0x04
-#define PCIE_ATU_UNR_LOWER_BASE 0x08
-#define PCIE_ATU_UNR_UPPER_BASE 0x0C
-#define PCIE_ATU_UNR_LIMIT 0x10
-#define PCIE_ATU_UNR_LOWER_TARGET 0x14
-#define PCIE_ATU_UNR_UPPER_TARGET 0x18
-
-/* Register address builder */
-#define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) ((0x3 << 20) | (region << 9))
-
/* PCIe Port Logic registers */
#define PLR_OFFSET 0x700
#define PCIE_PHY_DEBUG_R1 (PLR_OFFSET + 0x2c)
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index 32f4602..a6cf9262 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -14,6 +14,77 @@
#ifndef _PCIE_DESIGNWARE_H
#define _PCIE_DESIGNWARE_H
+/* Parameters for the waiting for link up routine */
+#define LINK_WAIT_MAX_RETRIES 10
+#define LINK_WAIT_USLEEP_MIN 90000
+#define LINK_WAIT_USLEEP_MAX 100000
+
+/* Parameters for the waiting for iATU enabled routine */
+#define LINK_WAIT_MAX_IATU_RETRIES 5
+#define LINK_WAIT_IATU_MIN 9000
+#define LINK_WAIT_IATU_MAX 10000
+
+/* Synopsys-specific PCIe configuration registers */
+#define PCIE_PORT_LINK_CONTROL 0x710
+#define PORT_LINK_MODE_MASK (0x3f << 16)
+#define PORT_LINK_MODE_1_LANES (0x1 << 16)
+#define PORT_LINK_MODE_2_LANES (0x3 << 16)
+#define PORT_LINK_MODE_4_LANES (0x7 << 16)
+#define PORT_LINK_MODE_8_LANES (0xf << 16)
+
+#define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
+#define PORT_LOGIC_SPEED_CHANGE (0x1 << 17)
+#define PORT_LOGIC_LINK_WIDTH_MASK (0x1f << 8)
+#define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8)
+#define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8)
+#define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8)
+#define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8)
+
+#define PCIE_MSI_ADDR_LO 0x820
+#define PCIE_MSI_ADDR_HI 0x824
+#define PCIE_MSI_INTR0_ENABLE 0x828
+#define PCIE_MSI_INTR0_MASK 0x82C
+#define PCIE_MSI_INTR0_STATUS 0x830
+
+#define PCIE_ATU_VIEWPORT 0x900
+#define PCIE_ATU_REGION_INBOUND (0x1 << 31)
+#define PCIE_ATU_REGION_OUTBOUND (0x0 << 31)
+#define PCIE_ATU_REGION_INDEX2 (0x2 << 0)
+#define PCIE_ATU_REGION_INDEX1 (0x1 << 0)
+#define PCIE_ATU_REGION_INDEX0 (0x0 << 0)
+#define PCIE_ATU_CR1 0x904
+#define PCIE_ATU_TYPE_MEM (0x0 << 0)
+#define PCIE_ATU_TYPE_IO (0x2 << 0)
+#define PCIE_ATU_TYPE_CFG0 (0x4 << 0)
+#define PCIE_ATU_TYPE_CFG1 (0x5 << 0)
+#define PCIE_ATU_CR2 0x908
+#define PCIE_ATU_ENABLE (0x1 << 31)
+#define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30)
+#define PCIE_ATU_LOWER_BASE 0x90C
+#define PCIE_ATU_UPPER_BASE 0x910
+#define PCIE_ATU_LIMIT 0x914
+#define PCIE_ATU_LOWER_TARGET 0x918
+#define PCIE_ATU_BUS(x) (((x) & 0xff) << 24)
+#define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19)
+#define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
+#define PCIE_ATU_UPPER_TARGET 0x91C
+
+/*
+ * iATU Unroll-specific register definitions
+ * From 4.80 core version the address translation will be made by unroll
+ */
+#define PCIE_ATU_UNR_REGION_CTRL1 0x00
+#define PCIE_ATU_UNR_REGION_CTRL2 0x04
+#define PCIE_ATU_UNR_LOWER_BASE 0x08
+#define PCIE_ATU_UNR_UPPER_BASE 0x0C
+#define PCIE_ATU_UNR_LIMIT 0x10
+#define PCIE_ATU_UNR_LOWER_TARGET 0x14
+#define PCIE_ATU_UNR_UPPER_TARGET 0x18
+
+/* Register address builder */
+#define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) \
+ ((0x3 << 20) | ((region) << 9))
+
/*
* Maximum number of MSI IRQs can be 256 per controller. But keep
* it 32 as of now. Probably we will never need more than 32. If needed,
--
1.7.9.5
^ permalink raw reply related
* [PATCH 03/37] PCI: dwc: dra7xx: Populate cpu_addr_fixup ops
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
Populate cpu_addr_fixup ops to extract the least 28 bits of the
corresponding cpu address.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/pci-dra7xx.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c
index fb37e09..2073d46 100644
--- a/drivers/pci/dwc/pci-dra7xx.c
+++ b/drivers/pci/dwc/pci-dra7xx.c
@@ -88,6 +88,11 @@ static inline void dra7xx_pcie_writel(struct dra7xx_pcie *pcie, u32 offset,
writel(value, pcie->base + offset);
}
+static u64 dra7xx_pcie_cpu_addr_fixup(u64 pci_addr)
+{
+ return pci_addr & DRA7XX_CPU_TO_BUS_ADDR;
+}
+
static int dra7xx_pcie_link_up(struct pcie_port *pp)
{
struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pp);
@@ -151,11 +156,6 @@ static void dra7xx_pcie_host_init(struct pcie_port *pp)
{
struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pp);
- pp->io_base &= DRA7XX_CPU_TO_BUS_ADDR;
- pp->mem_base &= DRA7XX_CPU_TO_BUS_ADDR;
- pp->cfg0_base &= DRA7XX_CPU_TO_BUS_ADDR;
- pp->cfg1_base &= DRA7XX_CPU_TO_BUS_ADDR;
-
dw_pcie_setup_rc(pp);
dra7xx_pcie_establish_link(dra7xx);
@@ -164,6 +164,7 @@ static void dra7xx_pcie_host_init(struct pcie_port *pp)
}
static struct pcie_host_ops dra7xx_pcie_host_ops = {
+ .cpu_addr_fixup = dra7xx_pcie_cpu_addr_fixup,
.link_up = dra7xx_pcie_link_up,
.host_init = dra7xx_pcie_host_init,
};
--
1.7.9.5
^ permalink raw reply related
* [PATCH 02/37] PCI: dwc: designware: Add new *ops* for cpu addr fixup
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
Some platforms (like dra7xx) require only the least 28 bits of the
corresponding 32 bit CPU address to be programmed in the address
translation unit. This modified address is stored in io_base/mem_base/
cfg0_base/cfg1_base in dra7xx_pcie_host_init. While this is okay for
host mode where the address range is fixed, device mode requires
different addresses to be programmed based on the host buffer address.
Add a new ops to get the least 28 bits of the corresponding 32 bit
CPU address and invoke it before programming the address translation
unit.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/pcie-designware.c | 3 +++
drivers/pci/dwc/pcie-designware.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index bed1999..d68bc7b 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -195,6 +195,9 @@ static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
{
u32 retries, val;
+ if (pp->ops->cpu_addr_fixup)
+ cpu_addr = pp->ops->cpu_addr_fixup(cpu_addr);
+
if (pp->iatu_unroll_enabled) {
dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_LOWER_BASE,
lower_32_bits(cpu_addr));
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index a567ea2..32f4602 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -54,6 +54,7 @@ struct pcie_port {
};
struct pcie_host_ops {
+ u64 (*cpu_addr_fixup)(u64 cpu_addr);
u32 (*readl_rc)(struct pcie_port *pp, u32 reg);
void (*writel_rc)(struct pcie_port *pp, u32 reg, u32 val);
int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
--
1.7.9.5
^ permalink raw reply related
* [PATCH 01/37] PCI: dwc: dra7xx: Group all host related setup in add_pcie_port
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484216786-17292-1-git-send-email-kishon@ti.com>
commit 150645b94348 ("PCI: dra7xx: Move struct pcie_port
setup to probe function") moved host related setup to the probe
function. However instead of cluttering the probe function with
host related setup, group all host related setup in add_pcie_port
function. This way when endpoint support is added, all the
endpoint related setup can be added in a separate function.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/dwc/pci-dra7xx.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c
index ec5617a..fb37e09 100644
--- a/drivers/pci/dwc/pci-dra7xx.c
+++ b/drivers/pci/dwc/pci-dra7xx.c
@@ -288,9 +288,13 @@ static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
struct platform_device *pdev)
{
int ret;
- struct pcie_port *pp = &dra7xx->pp;
- struct device *dev = pp->dev;
+ struct pcie_port *pp;
struct resource *res;
+ struct device *dev = &pdev->dev;
+
+ pp = &dra7xx->pp;
+ pp->dev = dev;
+ pp->ops = &dra7xx_pcie_host_ops;
pp->irq = platform_get_irq(pdev, 1);
if (pp->irq < 0) {
@@ -374,7 +378,6 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
void __iomem *base;
struct resource *res;
struct dra7xx_pcie *dra7xx;
- struct pcie_port *pp;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
char name[10];
@@ -384,10 +387,6 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
if (!dra7xx)
return -ENOMEM;
- pp = &dra7xx->pp;
- pp->dev = dev;
- pp->ops = &dra7xx_pcie_host_ops;
-
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "missing IRQ resource\n");
--
1.7.9.5
^ permalink raw reply related
* [PATCH 00/37] PCI: Support for configurable PCI endpoint
From: Kishon Vijay Abraham I @ 2017-01-12 10:25 UTC (permalink / raw)
To: linux-arm-kernel
The RFC series that was sent before this patch series can be found at [1].
The patches are split here so that it can be better reviewed.
This main purpose of this patch series is to
*) add PCI endpoint core layer
*) modifie designware/dra7xx driver to be configured in EP mode
*) add a PCI endpoint *test* function driver and corresponding host
driver
Major Improvements from RFC:
*) support multi-function devices (hw supported not virtual)
*) Access host side buffers
*) Raise MSI interrupts
*) Add user space program to use the host side PCI driver
*) Adapt all other users of designware to use the new design (only
compile tested. Since I have only dra7xx boards, the new design
has only been tested in dra7xx. I'd require the help of others
to test the platforms they have access to).
This patch series has been developed on top of 4.10-rc1, [2] & [3]
[1] -> https://lwn.net/Articles/700605/
[2] -> https://lkml.org/lkml/2016/12/28/34
[3] -> https://lkml.org/lkml/2017/1/11/238
I've also pushed the tree to
git://git.ti.com/linux-phy/linux-phy.git pci_ep_v1
Using PCI EPF Test:
ON THE EP SIDE:
***************
/* EP function is configured using configfs */
# mount -t configfs none /sys/kernel/config
/* PCI EP core layer creates "pci_ep" entry in configfs */
# cd /sys/kernel/config/pci_ep/
/*
* This is the 1st step in creating an endpoint function. This
* creates the endpoint device.
*/
# mkdir dev
/*
* dev has 2 entries. *epc* for binding a EPC device and *epf*
* is a directory containing all the functions of the endpoint
*/
# ls dev
epc epf
/*
* This creates the endpoint function device *instance*. The string
* before the .<num> suffix will identify the driver this
* EP function will bind to.
* Just pci_epf_test is also valid. The .<num> suffix is used
* if there are multiple PCI controllers and all of them wants
* to use the same function.
*/
# mkdir dev/epf/pci_epf_test.0
/*
* When the above command is given, the function device will
* also be bound to a function driver. To find the list of
* function drivers available in the system, use the following
* command. To create a new driver, the following can be referred
* drivers/pci/endpoint/functions/pci-epf-test.c
*/
# ls /sys/bus/pci-epf/drivers
pci_epf_test
/* Now configure the endpoint function */
/* These are the fields that can be configured */
# ls dev/epf/pci_epf_test.0/
baseclass_code function progif_code subsys_id
cache_line_size interrupt_pin revid subsys_vendor_id
deviceid msi_interrupts subclass_code vendorid
/* The function driver will populate these fields with default values */
# cat dev/epf/pci_epf_test.0/vendorid
0xffff
# cat dev/epf/pci_epf_test.0/interrupt_pin
0x0001
/* The user can configure any of these fields */
# echo 0x104c > dev/epf/pci_epf_test.0/vendorid
# echo 16 > dev/epf/pci_epf_test.0/msi_interrupts
/*
* Next is binding this function driver to the controller driver. In
* order to find the possible controller drivers that this function
* driver can be bound to, the following sysfs entry can be used
*/
# ls /sys/class/pci_epc/
51000000.pci
/* Now bind the function driver to the controller driver */
# echo "51000000.pcie_ep" > epc
[ 494.743487] dra7-pcie 51000000.pcie: no free inbound window
[ 494.749367] pci_epf_test pci_epf_test.0: failed to set BAR4
[ 494.755238] dra7-pcie 51000000.pcie: no free inbound window
[ 494.761451] pci_epf_test pci_epf_test.0: failed to set BAR5
/*
* the above error messages are due to non availability of free
* inbound windows. So the function drivers in dra7xx can use
* only 4 (BAR0..BAR3) BARs
*/
/****** PCI endpoint is configured ******/
ON THE HOST SIDE:
*****************
# ./pcitest.sh
BAR tests
BAR0: OKAY
BAR1: OKAY
BAR2: OKAY
BAR3: OKAY
BAR4: NOT OKAY
BAR5: NOT OKAY
Interrupt tests
LEGACY IRQ: NOT OKAY
MSI1: OKAY
MSI2: OKAY
MSI3: OKAY
MSI4: OKAY
MSI5: OKAY
MSI6: OKAY
MSI7: OKAY
MSI8: OKAY
MSI9: OKAY
MSI10: OKAY
MSI11: OKAY
MSI12: OKAY
MSI13: OKAY
MSI14: OKAY
MSI15: OKAY
MSI16: OKAY
MSI17: NOT OKAY
MSI18: NOT OKAY
MSI19: NOT OKAY
MSI20: NOT OKAY
MSI21: NOT OKAY
MSI22: NOT OKAY
MSI23: NOT OKAY
MSI24: NOT OKAY
MSI25: NOT OKAY
MSI26: NOT OKAY
MSI27: NOT OKAY
MSI28: NOT OKAY
MSI29: NOT OKAY
MSI30: NOT OKAY
MSI31: NOT OKAY
MSI32: NOT OKAY
Read Tests
READ ( 1 bytes): OKAY
READ ( 1024 bytes): OKAY
READ ( 1025 bytes): OKAY
READ (1024000 bytes): OKAY
READ (1024001 bytes): OKAY
Write Tests
WRITE ( 1 bytes): OKAY
WRITE ( 1024 bytes): OKAY
WRITE ( 1025 bytes): OKAY
WRITE (1024000 bytes): OKAY
WRITE (1024001 bytes): OKAY
Copy Tests
COPY ( 1 bytes): OKAY
COPY ( 1024 bytes): OKAY
COPY ( 1025 bytes): OKAY
COPY (1024000 bytes): OKAY
COPY (1024001 bytes): OKAY
Kishon Vijay Abraham I (37):
PCI: dwc: dra7xx: Group all host related setup in add_pcie_port
PCI: dwc: designware: Add new *ops* for cpu addr fixup
PCI: dwc: dra7xx: Populate cpu_addr_fixup ops
PCI: dwc: designware: Move the register defines to designware header
file
PCI: dwc: Add platform_set_drvdata
PCI: dwc: Rename cfg_read/cfg_write to read/write
PCI: dwc: designware: Get device pointer at the start of
dw_pcie_host_init
PCI: dwc: Split *struct pcie_port* into host only and core structures
PCI: dwc: designware: Parse *num-lanes* property in dw_pcie_setup_rc
PCI: dwc: designware: Fix style errors in pcie-designware.c
PCI: dwc: Split pcie-designware.c into host and core files
PCI: dwc: Create a new config symbol to enable pci dwc host
PCI: dwc: Remove dependency of designware to CONFIG_PCI
PCI: endpoint: Add EP core layer to enable EP controller and EP
functions
Documentation: PCI: Guide to use PCI Endpoint Core Layer
PCI: endpoint: Introduce configfs entry for configuring EP functions
Documentation: PCI: Guide to use pci endpoint configfs
Documentation: PCI: Add specification for the *pci test* function
device
PCI: endpoint: functions: Add an EP function to test PCI
Documentation: PCI: Add binding documentation for pci-test endpoint
function
PCI: dwc: Modify dbi accessors to take dbi_base as argument
PCI: dwc: Modify dbi accessors to access data of 4/2/1 bytes
PCI: dwc: Add *ops* to start and stop pcie link
PCI: dwc: designware: Add EP mode support
dt-bindings: PCI: Add dt bindings for pci designware EP mode
PCI: dwc: dra7xx: Facilitate wrapper and msi interrupts to be enabled
independently
PCI: dwc: dra7xx: Add EP mode support
dt-bindings: PCI: dra7xx: Add dt bindings for pci dra7xx EP mode
PCI: dwc: dra7xx: Workaround for errata id i870
dt-bindings: PCI: dra7xx: Add dt bindings to enable legacy mode
misc: Add host side pci driver for pci test function device
Documentation: misc-devices: Add Documentation for pci-endpoint-test
driver
tools: PCI: Add a userspace tool to test PCI endpoint
tools: PCI: Add sample test script to invoke pcitest
MAINTAINERS: add PCI EP maintainer
ARM: DRA7: clockdomain: Change the CLKTRCTRL of CM_PCIE_CLKSTCTRL to
SW_WKUP
ARM: dts: DRA7: Add pcie1 dt node for EP mode
Documentation/PCI/00-INDEX | 8 +
.../PCI/endpoint/function/binding/pci-test.txt | 17 +
Documentation/PCI/endpoint/pci-endpoint-cfs.txt | 84 ++
Documentation/PCI/endpoint/pci-endpoint.txt | 190 +++++
Documentation/PCI/endpoint/pci-test-function.txt | 66 ++
.../devicetree/bindings/pci/designware-pcie.txt | 26 +-
Documentation/devicetree/bindings/pci/ti-pci.txt | 41 +-
Documentation/misc-devices/pci-endpoint-test.txt | 35 +
MAINTAINERS | 9 +
arch/arm/boot/dts/am572x-idk.dts | 7 +-
arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi | 7 +-
arch/arm/boot/dts/dra7-evm.dts | 4 +
arch/arm/boot/dts/dra7.dtsi | 22 +-
arch/arm/boot/dts/dra72-evm-common.dtsi | 4 +
arch/arm/mach-omap2/clockdomains7xx_data.c | 2 +-
drivers/Makefile | 5 +
drivers/misc/Kconfig | 7 +
drivers/misc/Makefile | 1 +
drivers/misc/pci_endpoint_test.c | 533 ++++++++++++
drivers/pci/Kconfig | 1 +
drivers/pci/Makefile | 3 -
drivers/pci/dwc/Kconfig | 73 +-
drivers/pci/dwc/Makefile | 6 +-
drivers/pci/dwc/pci-dra7xx.c | 372 +++++++--
drivers/pci/dwc/pci-exynos.c | 83 +-
drivers/pci/dwc/pci-imx6.c | 142 ++--
drivers/pci/dwc/pci-keystone-dw.c | 91 +-
drivers/pci/dwc/pci-keystone.c | 56 +-
drivers/pci/dwc/pci-keystone.h | 4 +-
drivers/pci/dwc/pci-layerscape.c | 93 ++-
drivers/pci/dwc/pcie-armada8k.c | 92 ++-
drivers/pci/dwc/pcie-artpec6.c | 51 +-
drivers/pci/dwc/pcie-designware-ep.c | 342 ++++++++
drivers/pci/dwc/pcie-designware-host.c | 620 ++++++++++++++
drivers/pci/dwc/pcie-designware-plat.c | 29 +-
drivers/pci/dwc/pcie-designware.c | 868 ++++----------------
drivers/pci/dwc/pcie-designware.h | 254 +++++-
drivers/pci/dwc/pcie-hisi.c | 60 +-
drivers/pci/dwc/pcie-qcom.c | 72 +-
drivers/pci/dwc/pcie-spear13xx.c | 85 +-
drivers/pci/endpoint/Kconfig | 25 +
drivers/pci/endpoint/Makefile | 7 +
drivers/pci/endpoint/functions/Kconfig | 12 +
drivers/pci/endpoint/functions/Makefile | 5 +
drivers/pci/endpoint/functions/pci-epf-test.c | 513 ++++++++++++
drivers/pci/endpoint/pci-ep-cfs.c | 427 ++++++++++
drivers/pci/endpoint/pci-epc-core.c | 548 ++++++++++++
drivers/pci/endpoint/pci-epc-mem.c | 143 ++++
drivers/pci/endpoint/pci-epf-core.c | 347 ++++++++
include/linux/mod_devicetable.h | 10 +
include/linux/pci-epc.h | 141 ++++
include/linux/pci-epf.h | 160 ++++
include/uapi/linux/Kbuild | 1 +
include/uapi/linux/pcitest.h | 19 +
tools/pci/pcitest.c | 186 +++++
tools/pci/pcitest.sh | 56 ++
56 files changed, 5880 insertions(+), 1185 deletions(-)
create mode 100644 Documentation/PCI/endpoint/function/binding/pci-test.txt
create mode 100644 Documentation/PCI/endpoint/pci-endpoint-cfs.txt
create mode 100644 Documentation/PCI/endpoint/pci-endpoint.txt
create mode 100644 Documentation/PCI/endpoint/pci-test-function.txt
create mode 100644 Documentation/misc-devices/pci-endpoint-test.txt
create mode 100644 drivers/misc/pci_endpoint_test.c
create mode 100644 drivers/pci/dwc/pcie-designware-ep.c
create mode 100644 drivers/pci/dwc/pcie-designware-host.c
create mode 100644 drivers/pci/endpoint/Kconfig
create mode 100644 drivers/pci/endpoint/Makefile
create mode 100644 drivers/pci/endpoint/functions/Kconfig
create mode 100644 drivers/pci/endpoint/functions/Makefile
create mode 100644 drivers/pci/endpoint/functions/pci-epf-test.c
create mode 100644 drivers/pci/endpoint/pci-ep-cfs.c
create mode 100644 drivers/pci/endpoint/pci-epc-core.c
create mode 100644 drivers/pci/endpoint/pci-epc-mem.c
create mode 100644 drivers/pci/endpoint/pci-epf-core.c
create mode 100644 include/linux/pci-epc.h
create mode 100644 include/linux/pci-epf.h
create mode 100644 include/uapi/linux/pcitest.h
create mode 100644 tools/pci/pcitest.c
create mode 100644 tools/pci/pcitest.sh
--
1.7.9.5
^ permalink raw reply
* kvm: deadlock in kvm_vgic_map_resources
From: Christoffer Dall @ 2017-01-12 10:24 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <286255e8-918e-66b5-012f-f347a2ae71cd@arm.com>
On Thu, Jan 12, 2017 at 09:55:21AM +0000, Andre Przywara wrote:
> Hi,
>
> On 12/01/17 09:32, Marc Zyngier wrote:
> > Hi Dmitry,
> >
> > On 11/01/17 19:01, Dmitry Vyukov wrote:
> >> Hello,
> >>
> >> While running syzkaller fuzzer I've got the following deadlock.
> >> On commit 9c763584b7c8911106bb77af7e648bef09af9d80.
> >>
> >>
> >> =============================================
> >> [ INFO: possible recursive locking detected ]
> >> 4.9.0-rc6-xc2-00056-g08372dd4b91d-dirty #50 Not tainted
> >> ---------------------------------------------
> >> syz-executor/20805 is trying to acquire lock:
> >> (
> >> &kvm->lock
> >> ){+.+.+.}
> >> , at:
> >> [< inline >] kvm_vgic_dist_destroy
> >> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:271
> >> [<ffff2000080ea4bc>] kvm_vgic_destroy+0x34/0x250
> >> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:294
> >> but task is already holding lock:
> >> (&kvm->lock){+.+.+.}, at:
> >> [<ffff2000080ea7e4>] kvm_vgic_map_resources+0x2c/0x108
> >> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:343
> >> other info that might help us debug this:
> >> Possible unsafe locking scenario:
> >> CPU0
> >> ----
> >> lock(&kvm->lock);
> >> lock(&kvm->lock);
> >> *** DEADLOCK ***
> >> May be due to missing lock nesting notation
> >> 2 locks held by syz-executor/20805:
> >> #0:(&vcpu->mutex){+.+.+.}, at:
> >> [<ffff2000080bcc30>] vcpu_load+0x28/0x1d0
> >> arch/arm64/kvm/../../../virt/kvm/kvm_main.c:143
> >> #1:(&kvm->lock){+.+.+.}, at:
> >> [<ffff2000080ea7e4>] kvm_vgic_map_resources+0x2c/0x108
> >> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:343
> >> stack backtrace:
> >> CPU: 2 PID: 20805 Comm: syz-executor Not tainted
> >> 4.9.0-rc6-xc2-00056-g08372dd4b91d-dirty #50
> >> Hardware name: Hardkernel ODROID-C2 (DT)
> >> Call trace:
> >> [<ffff200008090560>] dump_backtrace+0x0/0x3c8 arch/arm64/kernel/traps.c:69
> >> [<ffff200008090948>] show_stack+0x20/0x30 arch/arm64/kernel/traps.c:219
> >> [< inline >] __dump_stack lib/dump_stack.c:15
> >> [<ffff200008895840>] dump_stack+0x100/0x150 lib/dump_stack.c:51
> >> [< inline >] print_deadlock_bug kernel/locking/lockdep.c:1728
> >> [< inline >] check_deadlock kernel/locking/lockdep.c:1772
> >> [< inline >] validate_chain kernel/locking/lockdep.c:2250
> >> [<ffff2000081c8718>] __lock_acquire+0x1938/0x3440 kernel/locking/lockdep.c:3335
> >> [<ffff2000081caa84>] lock_acquire+0xdc/0x1d8 kernel/locking/lockdep.c:3746
> >> [< inline >] __mutex_lock_common kernel/locking/mutex.c:521
> >> [<ffff200009700004>] mutex_lock_nested+0xdc/0x7b8 kernel/locking/mutex.c:621
> >> [< inline >] kvm_vgic_dist_destroy
> >> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:271
> >> [<ffff2000080ea4bc>] kvm_vgic_destroy+0x34/0x250
> >> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:294
> >> [<ffff2000080ec290>] vgic_v2_map_resources+0x218/0x430
> >> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-v2.c:295
> >> [<ffff2000080ea884>] kvm_vgic_map_resources+0xcc/0x108
> >> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:348
> >> [< inline >] kvm_vcpu_first_run_init
> >> arch/arm64/kvm/../../../arch/arm/kvm/arm.c:505
> >> [<ffff2000080d2768>] kvm_arch_vcpu_ioctl_run+0xab8/0xce0
> >> arch/arm64/kvm/../../../arch/arm/kvm/arm.c:591
> >> [<ffff2000080c1fec>] kvm_vcpu_ioctl+0x434/0xc08
> >> arch/arm64/kvm/../../../virt/kvm/kvm_main.c:2557
> >> [< inline >] vfs_ioctl fs/ioctl.c:43
> >> [<ffff200008450c38>] do_vfs_ioctl+0x128/0xfc0 fs/ioctl.c:679
> >> [< inline >] SYSC_ioctl fs/ioctl.c:694
> >> [<ffff200008451b78>] SyS_ioctl+0xa8/0xb8 fs/ioctl.c:685
> >> [<ffff200008083ef0>] el0_svc_naked+0x24/0x28 arch/arm64/kernel/entry.S:755
> >
> > Nice catch, and many thanks for reporting this.
> >
> > The bug is fairly obvious. Christoffer, what do you think? I don't think
> > we need to hold the kvm->lock all the way, but I'd like another pair of
> > eyes (the coffee machine is out of order again, and tea doesn't cut it).
> >
> > Thanks,
> >
> > M.
> >
> > From 93f80b20fb9351a49ee8b74eed3fc59c84651371 Mon Sep 17 00:00:00 2001
> > From: Marc Zyngier <marc.zyngier@arm.com>
> > Date: Thu, 12 Jan 2017 09:21:56 +0000
> > Subject: [PATCH] KVM: arm/arm64: vgic: Fix deadlock on error handling
> >
> > Dmitry Vyukov reported that the syzkaller fuzzer triggered a
> > deadlock in the vgic setup code when an error was detected, as
> > the cleanup code tries to take a lock that is already held by
> > the setup code.
> >
> > The fix is pretty obvious: move the cleaup call after having
> > dropped the lock, since not much can happen at that point.
> ^^^^^^^^
> Is that really true? If for instance the calls to
> vgic_register_dist_iodev() or kvm_phys_addr_ioremap() in
> vgic_v2_map_resources() fail, we leave the function with a half
> initialized VGIC (because vgic_init() succeeded). Dropping the lock at
> this point without having the GIC cleaned up before sounds a bit
> suspicious (I may be wrong on this, though).
>
> Can't we just document that kvm_vgic_destroy() needs to be called with
> the kvm->lock held and take the lock around the only other caller
> (kvm_arch_destroy_vm() in arch/arm/kvm/arm.c)?
> We can then keep holding the lock in the map_resources calls.
> Though we might still move the calls to kvm_vgic_destroy() into the
> wrapper function as a cleanup (as shown below), just before dropping the
> lock.
>
I was going to suggest the same. I cannot really see through all the
possible interactions, but I feel safer doing that.
Thanks,
-Christoffer
^ permalink raw reply
* NVMe vs DMA addressing limitations
From: Sagi Grimberg @ 2017-01-12 10:09 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20170110144839.GB27156@lst.de>
>> Another workaround me might need is to limit amount of concurrent DMA
>> in the NVMe driver based on some platform quirk. The way that NVMe works,
>> it can have very large amounts of data that is concurrently mapped into
>> the device.
>
> That's not really just NVMe - other storage and network controllers also
> can DMA map giant amounts of memory. There are a couple aspects to it:
>
> - dma coherent memoery - right now NVMe doesn't use too much of it,
> but upcoming low-end NVMe controllers will soon start to require
> fairl large amounts of it for the host memory buffer feature that
> allows for DRAM-less controller designs. As an interesting quirk
> that is memory only used by the PCIe devices, and never accessed
> by the Linux host at all.
Would it make sense to convert the nvme driver to use normal allocations
and use the DMA streaming APIs (dma_sync_single_for_[cpu|device]) for
both queues and future HMB?
> - size vs number of the dynamic mapping. We probably want the dma_ops
> specify a maximum mapping size for a given device. As long as we
> can make progress with a few mappings swiotlb / the iommu can just
> fail mapping and the driver will propagate that to the block layer
> that throttles I/O.
Isn't max mapping size per device too restrictive? it is possible that
not all devices posses active mappings concurrently.
^ permalink raw reply
* [PATCH 2/2] mmc: dt-bindings: update Mediatek MMC bindings
From: Yong Mao @ 2017-01-12 10:04 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484215490-7494-1-git-send-email-yong.mao@mediatek.com>
From: yong mao <yong.mao@mediatek.com>
Add description for hs200-cmd-int-delay
Add description for hs400-cmd-int-delay
Add description for cmd-resp-sel
Signed-off-by: Yong Mao <yong.mao@mediatek.com>
---
Documentation/devicetree/bindings/mmc/mtk-sd.txt | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.txt b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
index 0120c7f..2dbb3b0 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.txt
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
@@ -21,6 +21,9 @@ Optional properties:
- assigned-clocks: PLL of the source clock
- assigned-clock-parents: parent of source clock, used for HS400 mode to get 400Mhz source clock
- hs400-ds-delay: HS400 DS delay setting
+- hs200-cmd-int-delay: HS200 command internal delay setting
+- hs400-cmd-int-delay: HS400 command internal delay setting
+- cmd-resp-sel: command response sample selection
Examples:
mmc0: mmc at 11230000 {
@@ -38,4 +41,7 @@ mmc0: mmc at 11230000 {
assigned-clocks = <&topckgen CLK_TOP_MSDC50_0_SEL>;
assigned-clock-parents = <&topckgen CLK_TOP_MSDCPLL_D2>;
hs400-ds-delay = <0x14015>;
+ hs200-cmd-int-delay = <26>;
+ hs400-cmd-int-delay = <14>;
+ cmd-resp-sel = <0>; /* 0: rising, 1: falling */
};
--
1.7.9.5
^ permalink raw reply related
* [PATCH 1/2] mmc: mediatek: Use data tune for CMD line tune
From: Yong Mao @ 2017-01-12 10:04 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1484215490-7494-1-git-send-email-yong.mao@mediatek.com>
From: yong mao <yong.mao@mediatek.com>
CMD response CRC error may cause cannot boot up
Change to use data tune for CMD line
Separate cmd internal delay for HS200/HS400 mode
Signed-off-by: Yong Mao <yong.mao@mediatek.com>
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
---
arch/arm64/boot/dts/mediatek/mt8173-evb.dts | 3 +
drivers/mmc/host/mtk-sd.c | 169 +++++++++++++++++++++++----
2 files changed, 149 insertions(+), 23 deletions(-)
diff --git a/arch/arm64/boot/dts/mediatek/mt8173-evb.dts b/arch/arm64/boot/dts/mediatek/mt8173-evb.dts
index 0ecaad4..29c3100 100644
--- a/arch/arm64/boot/dts/mediatek/mt8173-evb.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8173-evb.dts
@@ -134,6 +134,9 @@
bus-width = <8>;
max-frequency = <50000000>;
cap-mmc-highspeed;
+ hs200-cmd-int-delay = <26>;
+ hs400-cmd-int-delay = <14>;
+ cmd-resp-sel = <0>; /* 0: rising, 1: falling */
vmmc-supply = <&mt6397_vemc_3v3_reg>;
vqmmc-supply = <&mt6397_vio18_reg>;
non-removable;
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 80ba034..93eb395 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -75,6 +75,7 @@
#define MSDC_PATCH_BIT1 0xb4
#define MSDC_PAD_TUNE 0xec
#define PAD_DS_TUNE 0x188
+#define PAD_CMD_TUNE 0x18c
#define EMMC50_CFG0 0x208
/*--------------------------------------------------------------------------*/
@@ -210,12 +211,17 @@
#define MSDC_PATCH_BIT_SPCPUSH (0x1 << 29) /* RW */
#define MSDC_PATCH_BIT_DECRCTMO (0x1 << 30) /* RW */
-#define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */
-#define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */
+#define MSDC_PAD_TUNE_DATWRDLY (0x1f << 0) /* RW */
+#define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */
+#define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */
+#define MSDC_PAD_TUNE_CMDRRDLY (0x1f << 22) /* RW */
+#define MSDC_PAD_TUNE_CLKTDLY (0x1f << 27) /* RW */
-#define PAD_DS_TUNE_DLY1 (0x1f << 2) /* RW */
-#define PAD_DS_TUNE_DLY2 (0x1f << 7) /* RW */
-#define PAD_DS_TUNE_DLY3 (0x1f << 12) /* RW */
+#define PAD_DS_TUNE_DLY1 (0x1f << 2) /* RW */
+#define PAD_DS_TUNE_DLY2 (0x1f << 7) /* RW */
+#define PAD_DS_TUNE_DLY3 (0x1f << 12) /* RW */
+
+#define PAD_CMD_TUNE_RX_DLY3 (0x1f << 1) /* RW */
#define EMMC50_CFG_PADCMD_LATCHCK (0x1 << 0) /* RW */
#define EMMC50_CFG_CRCSTS_EDGE (0x1 << 3) /* RW */
@@ -236,7 +242,9 @@
#define CMD_TIMEOUT (HZ/10 * 5) /* 100ms x5 */
#define DAT_TIMEOUT (HZ * 5) /* 1000ms x5 */
-#define PAD_DELAY_MAX 32 /* PAD delay cells */
+#define PAD_DELAY_MAX 32 /* PAD delay cells */
+#define ENOUGH_MARGIN_MIN 12 /* Enough Margin */
+#define PREFER_START_POS_MAX 4 /* Prefer start position */
/*--------------------------------------------------------------------------*/
/* Descriptor Structure */
/*--------------------------------------------------------------------------*/
@@ -284,12 +292,14 @@ struct msdc_save_para {
u32 patch_bit0;
u32 patch_bit1;
u32 pad_ds_tune;
+ u32 pad_cmd_tune;
u32 emmc50_cfg0;
};
struct msdc_tune_para {
u32 iocon;
u32 pad_tune;
+ u32 pad_cmd_tune;
};
struct msdc_delay_phase {
@@ -331,6 +341,9 @@ struct msdc_host {
unsigned char timing;
bool vqmmc_enabled;
u32 hs400_ds_delay;
+ u32 hs200_cmd_int_delay; /* cmd internal delay for HS200/SDR104 */
+ u32 hs400_cmd_int_delay; /* cmd internal delay for HS400 */
+ u32 hs200_cmd_resp_sel; /* cmd response sample selection */
bool hs400_mode; /* current eMMC will run@hs400 mode */
struct msdc_save_para save_para; /* used when gate HCLK */
struct msdc_tune_para def_tune_para; /* default tune setting */
@@ -596,12 +609,21 @@ static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
*/
if (host->sclk <= 52000000) {
writel(host->def_tune_para.iocon, host->base + MSDC_IOCON);
- writel(host->def_tune_para.pad_tune, host->base + MSDC_PAD_TUNE);
+ writel(host->def_tune_para.pad_tune,
+ host->base + MSDC_PAD_TUNE);
} else {
- writel(host->saved_tune_para.iocon, host->base + MSDC_IOCON);
- writel(host->saved_tune_para.pad_tune, host->base + MSDC_PAD_TUNE);
+ writel(host->saved_tune_para.iocon,
+ host->base + MSDC_IOCON);
+ writel(host->saved_tune_para.pad_tune,
+ host->base + MSDC_PAD_TUNE);
+ writel(host->saved_tune_para.pad_cmd_tune,
+ host->base + PAD_CMD_TUNE);
}
+ if (timing == MMC_TIMING_MMC_HS400)
+ sdr_set_field(host->base + PAD_CMD_TUNE,
+ MSDC_PAD_TUNE_CMDRRDLY,
+ host->hs400_cmd_int_delay);
dev_dbg(host->dev, "sclk: %d, timing: %d\n", host->sclk, timing);
}
@@ -1302,7 +1324,8 @@ static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay)
len_final = len;
}
start += len ? len : 1;
- if (len >= 8 && start_final < 4)
+ if (len >= ENOUGH_MARGIN_MIN &&
+ start_final < PREFER_START_POS_MAX)
break;
}
@@ -1325,48 +1348,128 @@ static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
struct msdc_host *host = mmc_priv(mmc);
u32 rise_delay = 0, fall_delay = 0;
struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
+ struct msdc_delay_phase internal_delay_phase;
u8 final_delay, final_maxlen;
+ u32 internal_delay = 0;
int cmd_err;
- int i;
+ int i, j;
+ if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
+ mmc->ios.timing == MMC_TIMING_UHS_SDR104)
+ sdr_set_field(host->base + MSDC_PAD_TUNE,
+ MSDC_PAD_TUNE_CMDRRDLY,
+ host->hs200_cmd_int_delay);
sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
for (i = 0 ; i < PAD_DELAY_MAX; i++) {
sdr_set_field(host->base + MSDC_PAD_TUNE,
MSDC_PAD_TUNE_CMDRDLY, i);
- mmc_send_tuning(mmc, opcode, &cmd_err);
- if (!cmd_err)
- rise_delay |= (1 << i);
+ for (j = 0; j < 3; j++) {
+ mmc_send_tuning(mmc, opcode, &cmd_err);
+ if (!cmd_err) {
+ rise_delay |= (1 << i);
+ } else {
+ rise_delay &= ~(1 << i);
+ break;
+ }
+ }
}
final_rise_delay = get_best_delay(host, rise_delay);
/* if rising edge has enough margin, then do not scan falling edge */
- if (final_rise_delay.maxlen >= 10 ||
- (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
+ if (final_rise_delay.maxlen >= ENOUGH_MARGIN_MIN &&
+ final_rise_delay.start < PREFER_START_POS_MAX)
goto skip_fall;
sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
for (i = 0; i < PAD_DELAY_MAX; i++) {
sdr_set_field(host->base + MSDC_PAD_TUNE,
MSDC_PAD_TUNE_CMDRDLY, i);
- mmc_send_tuning(mmc, opcode, &cmd_err);
- if (!cmd_err)
- fall_delay |= (1 << i);
+ for (j = 0; j < 3; j++) {
+ mmc_send_tuning(mmc, opcode, &cmd_err);
+ if (!cmd_err) {
+ fall_delay |= (1 << i);
+ } else {
+ fall_delay &= ~(1 << i);
+ break;
+ };
+ }
}
final_fall_delay = get_best_delay(host, fall_delay);
skip_fall:
final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
+ if (final_fall_delay.maxlen >= ENOUGH_MARGIN_MIN &&
+ final_fall_delay.start < PREFER_START_POS_MAX)
+ final_maxlen = final_fall_delay.maxlen;
if (final_maxlen == final_rise_delay.maxlen) {
sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
- sdr_set_field(host->base + MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRDLY,
+ sdr_set_field(host->base + MSDC_PAD_TUNE,
+ MSDC_PAD_TUNE_CMDRDLY,
final_rise_delay.final_phase);
final_delay = final_rise_delay.final_phase;
} else {
sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
- sdr_set_field(host->base + MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRDLY,
+ sdr_set_field(host->base + MSDC_PAD_TUNE,
+ MSDC_PAD_TUNE_CMDRDLY,
final_fall_delay.final_phase);
final_delay = final_fall_delay.final_phase;
}
+ if (host->hs200_cmd_int_delay)
+ goto skip_internal;
+ for (i = 0; i < PAD_DELAY_MAX; i++) {
+ sdr_set_field(host->base + MSDC_PAD_TUNE,
+ MSDC_PAD_TUNE_CMDRRDLY, i);
+ mmc_send_tuning(mmc, opcode, &cmd_err);
+ if (!cmd_err)
+ internal_delay |= (1 << i);
+ }
+ dev_info(host->dev, "Final internal delay: 0x%x\n", internal_delay);
+ internal_delay_phase = get_best_delay(host, internal_delay);
+ sdr_set_field(host->base + MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRRDLY,
+ internal_delay_phase.final_phase);
+skip_internal:
+ dev_info(host->dev, "Final cmd pad delay: %x\n", final_delay);
+ return final_delay == 0xff ? -EIO : 0;
+}
+
+static int hs400_tune_response(struct mmc_host *mmc, u32 opcode)
+{
+ struct msdc_host *host = mmc_priv(mmc);
+ u32 cmd_delay = 0;
+ struct msdc_delay_phase final_cmd_delay = { 0,};
+ u8 final_delay;
+ int cmd_err;
+ int i, j;
+
+ /* select EMMC50 PAD CMD tune */
+ sdr_set_bits(host->base + PAD_CMD_TUNE, BIT(0));
+
+ if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
+ mmc->ios.timing == MMC_TIMING_UHS_SDR104)
+ sdr_set_field(host->base + MSDC_PAD_TUNE,
+ MSDC_PAD_TUNE_CMDRRDLY,
+ host->hs200_cmd_int_delay);
+ sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_RSPL,
+ host->hs200_cmd_resp_sel);
+ for (i = 0 ; i < PAD_DELAY_MAX; i++) {
+ sdr_set_field(host->base + PAD_CMD_TUNE,
+ PAD_CMD_TUNE_RX_DLY3, i);
+ for (j = 0; j < 3; j++) {
+ mmc_send_tuning(mmc, opcode, &cmd_err);
+ if (!cmd_err) {
+ cmd_delay |= (1 << i);
+ } else {
+ cmd_delay &= ~(1 << i);
+ break;
+ }
+ }
+ }
+ final_cmd_delay = get_best_delay(host, cmd_delay);
+ sdr_set_field(host->base + PAD_CMD_TUNE, PAD_CMD_TUNE_RX_DLY3,
+ final_cmd_delay.final_phase);
+ final_delay = final_cmd_delay.final_phase;
+
+ dev_info(host->dev, "Final cmd pad delay: %x\n", final_delay);
return final_delay == 0xff ? -EIO : 0;
}
@@ -1389,7 +1492,7 @@ static int msdc_tune_data(struct mmc_host *mmc, u32 opcode)
}
final_rise_delay = get_best_delay(host, rise_delay);
/* if rising edge has enough margin, then do not scan falling edge */
- if (final_rise_delay.maxlen >= 10 ||
+ if (final_rise_delay.maxlen >= ENOUGH_MARGIN_MIN ||
(final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
goto skip_fall;
@@ -1422,6 +1525,7 @@ static int msdc_tune_data(struct mmc_host *mmc, u32 opcode)
final_delay = final_fall_delay.final_phase;
}
+ dev_info(host->dev, "Final data pad delay: %x\n", final_delay);
return final_delay == 0xff ? -EIO : 0;
}
@@ -1430,10 +1534,13 @@ static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
struct msdc_host *host = mmc_priv(mmc);
int ret;
+ if (host->hs400_mode)
+ ret = hs400_tune_response(mmc, opcode);
+ else
ret = msdc_tune_response(mmc, opcode);
if (ret == -EIO) {
dev_err(host->dev, "Tune response fail!\n");
- return ret;
+ goto out;
}
if (host->hs400_mode == false) {
ret = msdc_tune_data(mmc, opcode);
@@ -1443,6 +1550,8 @@ static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
host->saved_tune_para.pad_tune = readl(host->base + MSDC_PAD_TUNE);
+ host->saved_tune_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
+out:
return ret;
}
@@ -1553,6 +1662,18 @@ static int msdc_drv_probe(struct platform_device *pdev)
dev_dbg(&pdev->dev, "hs400-ds-delay: %x\n",
host->hs400_ds_delay);
+ if (!of_property_read_u32(pdev->dev.of_node, "hs200-cmd-int-delay",
+ &host->hs200_cmd_int_delay))
+ dev_dbg(&pdev->dev, "host->hs200-cmd-int-delay: %x\n",
+ host->hs200_cmd_int_delay);
+ if (!of_property_read_u32(pdev->dev.of_node, "hs400-cmd-int-delay",
+ &host->hs400_cmd_int_delay))
+ dev_dbg(&pdev->dev, "host->hs400-cmd-int-delay: %x\n",
+ host->hs400_cmd_int_delay);
+ if (!of_property_read_u32(pdev->dev.of_node, "cmd-resp-sel",
+ &host->hs200_cmd_resp_sel))
+ dev_dbg(&pdev->dev, "host->hs200_cmd-resp-sel: %x\n",
+ host->hs200_cmd_resp_sel);
host->dev = &pdev->dev;
host->mmc = mmc;
host->src_clk_freq = clk_get_rate(host->src_clk);
@@ -1663,6 +1784,7 @@ static void msdc_save_reg(struct msdc_host *host)
host->save_para.patch_bit0 = readl(host->base + MSDC_PATCH_BIT);
host->save_para.patch_bit1 = readl(host->base + MSDC_PATCH_BIT1);
host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE);
+ host->save_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0);
}
@@ -1675,6 +1797,7 @@ static void msdc_restore_reg(struct msdc_host *host)
writel(host->save_para.patch_bit0, host->base + MSDC_PATCH_BIT);
writel(host->save_para.patch_bit1, host->base + MSDC_PATCH_BIT1);
writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE);
+ writel(host->save_para.pad_cmd_tune, host->base + PAD_CMD_TUNE);
writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0);
}
--
1.7.9.5
^ permalink raw reply related
* [PATCH 0/2] Use data tune for CMD line tune
From: Yong Mao @ 2017-01-12 10:04 UTC (permalink / raw)
To: linux-arm-kernel
CMD response CRC error may cause cannot boot up
Change to use data tune for CMD line
Separate cmd internal delay for HS200/HS400 mode
yong mao (2):
mmc: mediatek: Use data tune for CMD line tune
mmc: dt-bindings: update Mediatek MMC bindings
Documentation/devicetree/bindings/mmc/mtk-sd.txt | 6 +
arch/arm64/boot/dts/mediatek/mt8173-evb.dts | 3 +
drivers/mmc/host/mtk-sd.c | 169 ++++++++++++++++++++---
3 files changed, 155 insertions(+), 23 deletions(-)
--
1.8.1.1
^ permalink raw reply
* [PATCH v3 2/5] arm64: Work around Falkor erratum 1003
From: Catalin Marinas @ 2017-01-12 9:59 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20170111183738.GD29247@leverpostej>
On Wed, Jan 11, 2017 at 06:37:39PM +0000, Mark Rutland wrote:
> On Wed, Jan 11, 2017 at 12:35:55PM -0600, Timur Tabi wrote:
> > On 01/11/2017 12:33 PM, Mark Rutland wrote:
> > >It'll need to affect all lines since the kconfig column needs to expand
> > >by at least one character to fit QCOM_FALKOR_ERRATUM_1003.
> >
> > Or we can make the macro shorter.
>
> The name, as it is, is perfectly descriptive.
>
> Let's not sacrifice legibility over a non-issue.
I agree, I didn't realise that the we expand the last column already.
It's a non-issue indeed.
--
Catalin
^ permalink raw reply
* [PATCH 56/62] watchdog: tangox_wdt: Convert to use device managed functions
From: Uwe Kleine-König @ 2017-01-12 9:57 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <0f68aa11-161b-0435-ea0f-851432464bc1@sigmadesigns.com>
On Thu, Jan 12, 2017 at 10:44:07AM +0100, Marc Gonzalez wrote:
> On 11/01/2017 18:51, Guenter Roeck wrote:
>
> > However, some other unrelated undefined behavior does not mean that this
> > specific behavior is undefined.
>
> True :-)
>
> Let me just give two additional examples of UB that /have/ bitten
> Linux kernel devs.
>
> int i;
> for (i = 1; i > 0; ++i)
> /* do_something(); */
>
> => optimized into an infinite loop
>
> and
>
> void func(struct foo *p) {
> int n = p->field;
> if (!p) return;
>
> => null-pointer check optimized away
>
> > So far we have a claim that a cast to a void * may somehow be different
> > to a cast to a different pointer, if used as function argument, and that
> > the behavior with such a cast may be undefined. In other words, you claim
> > that a function implemented as, say,
> >
> > void func(int *var) {}
> >
> > might result in undefined behavior if some header file declares it as
> >
> > void func(void *);
> >
> > and it is called as
> >
> > int var;
> >
> > func(&var);
> >
> > That seems really far fetched to me.
>
> Thanks for giving me an opportunity to play the language lawyer :-)
>
> C99 6.3.2.3 sub-clause 8 states:
>
> "A pointer to a function of one type may be converted to a pointer to a function of another
> type and back again; the result shall compare equal to the original pointer. If a converted
> pointer is used to call a function whose type is not compatible with the pointed-to type,
> the behavior is undefined."
>
> So, the behavior is undefined, not when you cast clk_disable_unprepare,
> but when clk_disable_unprepare is later called through the devres->action
> function pointer.
>
> However, I agree that it will work as expected on typical platforms
> (where all pointers are the same size, and the calling convention
> treats all pointers the same).
>
> > I do get the message that you do not like this kind of cast. But that doesn't
> > mean it is not correct.
>
> If it's already widely used in the kernel, it seems there is no point
> fighting it ;-)
I'd say +.5 here (where +1 is an ack). My approach would be to push
devm_clk_prepare_enable and use that. It cannot be that hard, can it?
It looks prettier, is well defined, easier to fit into 80 chars per
line. I wonder why not everybody jubilates on this new function.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-K?nig |
Industrial Linux Solutions | http://www.pengutronix.de/ |
^ permalink raw reply
* kvm: deadlock in kvm_vgic_map_resources
From: Andre Przywara @ 2017-01-12 9:55 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <70371c5c-d0c0-b59e-b12c-fd8359392763@arm.com>
Hi,
On 12/01/17 09:32, Marc Zyngier wrote:
> Hi Dmitry,
>
> On 11/01/17 19:01, Dmitry Vyukov wrote:
>> Hello,
>>
>> While running syzkaller fuzzer I've got the following deadlock.
>> On commit 9c763584b7c8911106bb77af7e648bef09af9d80.
>>
>>
>> =============================================
>> [ INFO: possible recursive locking detected ]
>> 4.9.0-rc6-xc2-00056-g08372dd4b91d-dirty #50 Not tainted
>> ---------------------------------------------
>> syz-executor/20805 is trying to acquire lock:
>> (
>> &kvm->lock
>> ){+.+.+.}
>> , at:
>> [< inline >] kvm_vgic_dist_destroy
>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:271
>> [<ffff2000080ea4bc>] kvm_vgic_destroy+0x34/0x250
>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:294
>> but task is already holding lock:
>> (&kvm->lock){+.+.+.}, at:
>> [<ffff2000080ea7e4>] kvm_vgic_map_resources+0x2c/0x108
>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:343
>> other info that might help us debug this:
>> Possible unsafe locking scenario:
>> CPU0
>> ----
>> lock(&kvm->lock);
>> lock(&kvm->lock);
>> *** DEADLOCK ***
>> May be due to missing lock nesting notation
>> 2 locks held by syz-executor/20805:
>> #0:(&vcpu->mutex){+.+.+.}, at:
>> [<ffff2000080bcc30>] vcpu_load+0x28/0x1d0
>> arch/arm64/kvm/../../../virt/kvm/kvm_main.c:143
>> #1:(&kvm->lock){+.+.+.}, at:
>> [<ffff2000080ea7e4>] kvm_vgic_map_resources+0x2c/0x108
>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:343
>> stack backtrace:
>> CPU: 2 PID: 20805 Comm: syz-executor Not tainted
>> 4.9.0-rc6-xc2-00056-g08372dd4b91d-dirty #50
>> Hardware name: Hardkernel ODROID-C2 (DT)
>> Call trace:
>> [<ffff200008090560>] dump_backtrace+0x0/0x3c8 arch/arm64/kernel/traps.c:69
>> [<ffff200008090948>] show_stack+0x20/0x30 arch/arm64/kernel/traps.c:219
>> [< inline >] __dump_stack lib/dump_stack.c:15
>> [<ffff200008895840>] dump_stack+0x100/0x150 lib/dump_stack.c:51
>> [< inline >] print_deadlock_bug kernel/locking/lockdep.c:1728
>> [< inline >] check_deadlock kernel/locking/lockdep.c:1772
>> [< inline >] validate_chain kernel/locking/lockdep.c:2250
>> [<ffff2000081c8718>] __lock_acquire+0x1938/0x3440 kernel/locking/lockdep.c:3335
>> [<ffff2000081caa84>] lock_acquire+0xdc/0x1d8 kernel/locking/lockdep.c:3746
>> [< inline >] __mutex_lock_common kernel/locking/mutex.c:521
>> [<ffff200009700004>] mutex_lock_nested+0xdc/0x7b8 kernel/locking/mutex.c:621
>> [< inline >] kvm_vgic_dist_destroy
>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:271
>> [<ffff2000080ea4bc>] kvm_vgic_destroy+0x34/0x250
>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:294
>> [<ffff2000080ec290>] vgic_v2_map_resources+0x218/0x430
>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-v2.c:295
>> [<ffff2000080ea884>] kvm_vgic_map_resources+0xcc/0x108
>> arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.c:348
>> [< inline >] kvm_vcpu_first_run_init
>> arch/arm64/kvm/../../../arch/arm/kvm/arm.c:505
>> [<ffff2000080d2768>] kvm_arch_vcpu_ioctl_run+0xab8/0xce0
>> arch/arm64/kvm/../../../arch/arm/kvm/arm.c:591
>> [<ffff2000080c1fec>] kvm_vcpu_ioctl+0x434/0xc08
>> arch/arm64/kvm/../../../virt/kvm/kvm_main.c:2557
>> [< inline >] vfs_ioctl fs/ioctl.c:43
>> [<ffff200008450c38>] do_vfs_ioctl+0x128/0xfc0 fs/ioctl.c:679
>> [< inline >] SYSC_ioctl fs/ioctl.c:694
>> [<ffff200008451b78>] SyS_ioctl+0xa8/0xb8 fs/ioctl.c:685
>> [<ffff200008083ef0>] el0_svc_naked+0x24/0x28 arch/arm64/kernel/entry.S:755
>
> Nice catch, and many thanks for reporting this.
>
> The bug is fairly obvious. Christoffer, what do you think? I don't think
> we need to hold the kvm->lock all the way, but I'd like another pair of
> eyes (the coffee machine is out of order again, and tea doesn't cut it).
>
> Thanks,
>
> M.
>
> From 93f80b20fb9351a49ee8b74eed3fc59c84651371 Mon Sep 17 00:00:00 2001
> From: Marc Zyngier <marc.zyngier@arm.com>
> Date: Thu, 12 Jan 2017 09:21:56 +0000
> Subject: [PATCH] KVM: arm/arm64: vgic: Fix deadlock on error handling
>
> Dmitry Vyukov reported that the syzkaller fuzzer triggered a
> deadlock in the vgic setup code when an error was detected, as
> the cleanup code tries to take a lock that is already held by
> the setup code.
>
> The fix is pretty obvious: move the cleaup call after having
> dropped the lock, since not much can happen at that point.
^^^^^^^^
Is that really true? If for instance the calls to
vgic_register_dist_iodev() or kvm_phys_addr_ioremap() in
vgic_v2_map_resources() fail, we leave the function with a half
initialized VGIC (because vgic_init() succeeded). Dropping the lock at
this point without having the GIC cleaned up before sounds a bit
suspicious (I may be wrong on this, though).
Can't we just document that kvm_vgic_destroy() needs to be called with
the kvm->lock held and take the lock around the only other caller
(kvm_arch_destroy_vm() in arch/arm/kvm/arm.c)?
We can then keep holding the lock in the map_resources calls.
Though we might still move the calls to kvm_vgic_destroy() into the
wrapper function as a cleanup (as shown below), just before dropping the
lock.
Cheers,
Andre.
> Cc: stable at vger.kernel.org
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> ---
> virt/kvm/arm/vgic/vgic-init.c | 4 ++++
> virt/kvm/arm/vgic/vgic-v2.c | 2 --
> virt/kvm/arm/vgic/vgic-v3.c | 2 --
> 3 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c
> index 5114391..0e0c295 100644
> --- a/virt/kvm/arm/vgic/vgic-init.c
> +++ b/virt/kvm/arm/vgic/vgic-init.c
> @@ -350,6 +350,10 @@ int kvm_vgic_map_resources(struct kvm *kvm)
> ret = vgic_v3_map_resources(kvm);
> out:
> mutex_unlock(&kvm->lock);
> +
> + if (ret)
> + kvm_vgic_destroy(kvm);
> +
> return ret;
> }
>
> diff --git a/virt/kvm/arm/vgic/vgic-v2.c b/virt/kvm/arm/vgic/vgic-v2.c
> index 9bab867..834137e 100644
> --- a/virt/kvm/arm/vgic/vgic-v2.c
> +++ b/virt/kvm/arm/vgic/vgic-v2.c
> @@ -293,8 +293,6 @@ int vgic_v2_map_resources(struct kvm *kvm)
> dist->ready = true;
>
> out:
> - if (ret)
> - kvm_vgic_destroy(kvm);
> return ret;
> }
>
> diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c
> index 7df1b90..a4c7fff 100644
> --- a/virt/kvm/arm/vgic/vgic-v3.c
> +++ b/virt/kvm/arm/vgic/vgic-v3.c
> @@ -308,8 +308,6 @@ int vgic_v3_map_resources(struct kvm *kvm)
> dist->ready = true;
>
> out:
> - if (ret)
> - kvm_vgic_destroy(kvm);
> return ret;
> }
>
>
^ permalink raw reply
* [PATCH v6 11/25] usb: chipidea: vbus event may exist before starting gadget
From: Peter Chen @ 2017-01-12 9:52 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <148418115431.32258.10648057913784071156@sboyd-linaro>
On Wed, Jan 11, 2017 at 04:32:34PM -0800, Stephen Boyd wrote:
> Quoting Peter Chen (2017-01-03 00:00:31)
> > On Wed, Dec 28, 2016 at 02:56:57PM -0800, Stephen Boyd wrote:
> > > From: Peter Chen <peter.chen@nxp.com>
> > >
> > > At some situations, the vbus may already be there before starting
> > > gadget. So we need to check vbus event after switch to gadget in
> > > order to handle missing vbus event. The typical use cases are plugging
> > > vbus cable before driver load or the vbus has already been there
> > > after stopping host but before starting gadget.
> > >
> > > Signed-off-by: Peter Chen <peter.chen@nxp.com>
> > > Tested-by: Stephen Boyd <stephen.boyd@linaro.org>
> > > Reviewed-by: Stephen Boyd <stephen.boyd@linaro.org>
> > > [sboyd at codeaurora.org: Modify comment text per list discussion]
> > > Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
> > > ---
> > > drivers/usb/chipidea/core.c | 4 ----
> > > drivers/usb/chipidea/otg.c | 14 +++++++++-----
> > > drivers/usb/chipidea/udc.c | 2 ++
> > > 3 files changed, 11 insertions(+), 9 deletions(-)
> > >
> > > diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
> > > index 8a020ebbbe2f..37f888e31f10 100644
> > > --- a/drivers/usb/chipidea/core.c
> > > +++ b/drivers/usb/chipidea/core.c
> > > @@ -979,10 +979,6 @@ static int ci_hdrc_probe(struct platform_device *pdev)
> > > }
> > >
> > > if (!ci_otg_is_fsm_mode(ci)) {
> > > - /* only update vbus status for peripheral */
> > > - if (ci->role == CI_ROLE_GADGET)
> > > - ci_handle_vbus_change(ci);
> > > -
> > > ret = ci_role_start(ci, ci->role);
> > > if (ret) {
> > > dev_err(dev, "can't start %s role\n",
> > > diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c
> > > index 695f3fe3ae21..c972ed23b8ec 100644
> > > --- a/drivers/usb/chipidea/otg.c
> > > +++ b/drivers/usb/chipidea/otg.c
> > > @@ -134,9 +134,9 @@ void ci_handle_vbus_change(struct ci_hdrc *ci)
> > > if (!ci->is_otg)
> > > return;
> > >
> > > - if (hw_read_otgsc(ci, OTGSC_BSV))
> > > + if (hw_read_otgsc(ci, OTGSC_BSV) && !ci->vbus_active)
> > > usb_gadget_vbus_connect(&ci->gadget);
> > > - else
> > > + else if (!hw_read_otgsc(ci, OTGSC_BSV) && ci->vbus_active)
> > > usb_gadget_vbus_disconnect(&ci->gadget);
> > > }
> > >
> > > @@ -175,10 +175,14 @@ static void ci_handle_id_switch(struct ci_hdrc *ci)
> > >
> > > ci_role_stop(ci);
> > >
> > > - if (role == CI_ROLE_GADGET)
> > > + if (role == CI_ROLE_GADGET &&
> > > + IS_ERR(ci->platdata->vbus_extcon.edev))
> > > /*
> > > - * wait vbus lower than OTGSC_BSV before connecting
> > > - * to host
> > > + * wait vbus lower than OTGSC_BSV before connecting to
> > > + * host. If connecting status is from an external
> > > + * connector instead of register, we don't need to care
> > > + * vbus on the board, since it will not affect external
> > > + * connector status.
> > > */
> > > hw_wait_vbus_lower_bsv(ci);
> > >
> > > diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> > > index 732b281485de..0db56fb7e9e9 100644
> > > --- a/drivers/usb/chipidea/udc.c
> > > +++ b/drivers/usb/chipidea/udc.c
> > > @@ -1961,6 +1961,8 @@ static int udc_id_switch_for_device(struct ci_hdrc *ci)
> > > /* Clear and enable BSV irq */
> > > hw_write_otgsc(ci, OTGSC_BSVIS | OTGSC_BSVIE,
> > > OTGSC_BSVIS | OTGSC_BSVIE);
> > > + /* vbus change may has already been occurred */
> > > + ci_handle_vbus_change(ci);
> > >
> > > return 0;
> >
> > After thinking more, the above change will affect OTG FSM which calls
> > this API too, but handle vbus change later, see ci_otg_start_host and
> > ci_otg_start_gadget. How about changing patch like below:
>
> Ok. I'll give it a spin but I think that should work too. I don't have
> any hardware to test the OTG FSM to make sure things don't break.
ci_handle_id_switch is only called at non OTG FSM mode, so it will not
affect OTG FSM.
--
Best Regards,
Peter Chen
^ permalink raw reply
* [PATCH v6 23/25] usb: chipidea: Pullup D+ in device mode via phy APIs
From: Peter Chen @ 2017-01-12 9:50 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <148418039309.32258.7247753739063801774@sboyd-linaro>
On Wed, Jan 11, 2017 at 04:19:53PM -0800, Stephen Boyd wrote:
> Quoting Peter Chen (2017-01-02 22:53:19)
> > On Wed, Dec 28, 2016 at 02:57:09PM -0800, Stephen Boyd wrote:
> > > If the phy supports it, call phy_set_mode() to pull up D+ when
> > > required by setting the mode to PHY_MODE_USB_DEVICE. If we want
> > > to remove the pullup, set the mode to PHY_MODE_USB_HOST.
> > >
> [..]
> > > diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> > > index 0d532a724d48..6d61fa0689b0 100644
> > > --- a/drivers/usb/chipidea/udc.c
> > > +++ b/drivers/usb/chipidea/udc.c
> > > @@ -1609,10 +1610,15 @@ static int ci_udc_pullup(struct usb_gadget *_gadget, int is_on)
> > > return 0;
> > >
> > > pm_runtime_get_sync(&ci->gadget.dev);
> > > - if (is_on)
> > > + if (is_on) {
> > > + if (ci->phy)
> > > + phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE);
> > > hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
> > > - else
> > > + } else {
> > > hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
> > > + if (ci->phy)
> > > + phy_set_mode(ci->phy, PHY_MODE_USB_HOST);
> > > + }
> > > pm_runtime_put_sync(&ci->gadget.dev);
> > >
> > > return 0;
> >
> > Would you describe the use case for it? Why not adding it at
> > role switch routine?
> >
>
> This is about pulling up D+. The phy I have requires that we manually
> pull up D+ by writing a ULPI register before we set the run/stop bit.
Afaik, only controller can pull up dp when it is at device mode by
setting USBCMD_RS. At host mode, clear USBCMD_RS will only stopping
sending SoF from controller side.
I am puzzled why you can pull up D+ by writing an ULPI register, perhaps,
your phy needs DP to change before switching the mode? Would you
double confirm that?
> I
> thought it would be appropriate to do so in ci_udc_pullup(), where we're
> supposed to put that pullup code, unless I'm mistaken?
>
> It's not exactly about putting the phy into device or host mode, so
> phy_set_mode() may not actually be the best API to use. Perhaps we need
> some sort of phy_pullup_usb() API here?
--
Best Regards,
Peter Chen
^ permalink raw reply
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