[PATCH v3 2/3] remoteproc: k4: Split out functions common with M4 driver

Martyn Welch
2023-03-02T17:15:16Z

In the next commit we will be adding the M4F driver which shares a lot of
commonality with the DSP driver. Split this shared functionality out so
that it can be used by both drivers.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
---

Changes since v2:
- New patch (reordered refactoring from v2)

drivers/remoteproc/Makefile | 2 +-
drivers/remoteproc/ti_k3_common.c | 375 ++++++++++++++++++
drivers/remoteproc/ti_k3_common.h | 102 +++++
drivers/remoteproc/ti_k3_dsp_remoteproc.c | 462 ++--------------------
4 files changed, 506 insertions(+), 435 deletions(-)
create mode 100644 drivers/remoteproc/ti_k3_common.c
create mode 100644 drivers/remoteproc/ti_k3_common.h

diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 91314a9b43ce..55c552e27a45 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -36,6 +36,6 @@ obj-$(CONFIG_RCAR_REMOTEPROC) += rcar_rproc.o
obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o
obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o
obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o
-obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o
+obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o ti_k3_common.o
obj-$(CONFIG_TI_K3_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o
obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o
diff --git a/drivers/remoteproc/ti_k3_common.c b/drivers/remoteproc/ti_k3_common.c
new file mode 100644
index 000000000000..e9bd6f0104e4
--- /dev/null
+++ b/drivers/remoteproc/ti_k3_common.c
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI K3 Remote Processor(s) driver common code
+ *
+ * Refactored from ti_k3_dsp_remoteproc.c.
+ *
+ * ti_k3_dsp_remoteproc.c:
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ * Suman Anna <s-anna@ti.com>
+ */
+
+#include <linux/io.h>
+#include <linux/mailbox_client.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/omap-mailbox.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include "omap_remoteproc.h"
+#include "remoteproc_internal.h"
+#include "ti_sci_proc.h"
+#include "ti_k3_common.h"
+
+/*
+ * Kick the remote processor to notify about pending unprocessed messages.
+ * The vqid usage is not used and is inconsequential, as the kick is performed
+ * through a simulated GPIO (a bit in an IPC interrupt-triggering register),
+ * the remote processor is expected to process both its Tx and Rx virtqueues.
+ */
+void k3_rproc_kick(struct rproc *rproc, int vqid)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct device *dev = rproc->dev.parent;
+ mbox_msg_t msg = (mbox_msg_t)vqid;
+ int ret;
+
+ /* send the index of the triggered virtqueue in the mailbox payload */
+ ret = mbox_send_message(kproc->mbox, (void *)msg);
+ if (ret < 0)
+ dev_err(dev, "failed to send mailbox message, status = %d\n",
+ ret);
+}
+EXPORT_SYMBOL_GPL(k3_rproc_kick);
+
+/* Put the remote processor into reset */
+int k3_rproc_reset(struct k3_rproc *kproc)
+{
+ struct device *dev = kproc->dev;
+ int ret;
+
+ ret = reset_control_assert(kproc->reset);
+ if (ret) {
+ dev_err(dev, "local-reset assert failed, ret = %d\n", ret);
+ return ret;
+ }
+
+ if (kproc->data->uses_lreset)
+ return ret;
+
+ ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
+ kproc->ti_sci_id);
+ if (ret) {
+ dev_err(dev, "module-reset assert failed, ret = %d\n", ret);
+ if (reset_control_deassert(kproc->reset))
+ dev_warn(dev, "local-reset deassert back failed\n");
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_reset);
+
+/* Release the remote processor from reset */
+int k3_rproc_release(struct k3_rproc *kproc)
+{
+ struct device *dev = kproc->dev;
+ int ret;
+
+ if (kproc->data->uses_lreset)
+ goto lreset;
+
+ ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
+ kproc->ti_sci_id);
+ if (ret) {
+ dev_err(dev, "module-reset deassert failed, ret = %d\n", ret);
+ return ret;
+ }
+
+lreset:
+ ret = reset_control_deassert(kproc->reset);
+ if (ret) {
+ dev_err(dev, "local-reset deassert failed, ret = %d\n", ret);
+ if (kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
+ kproc->ti_sci_id))
+ dev_warn(dev, "module-reset assert back failed\n");
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_release);
+
+/*
+ * This function implements the .get_loaded_rsc_table() callback and is used
+ * to provide the resource table for a booted remote processor in IPC-only
+ * mode. The remote processor firmwares follow a design-by-contract approach
+ * and are expected to have the resource table at the base of the DDR region
+ * reserved for firmware usage. This provides flexibility for the remote
+ * processor to be booted by different bootloaders that may or may not have the
+ * ability to publish the resource table address and size through a DT
+ * property.
+ */
+struct resource_table *k3_get_loaded_rsc_table(struct rproc *rproc,
+ size_t *rsc_table_sz)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct device *dev = kproc->dev;
+
+ if (!kproc->rmem[0].cpu_addr) {
+ dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ /*
+ * NOTE: The resource table size is currently hard-coded to a maximum
+ * of 256 bytes. The most common resource table usage for K3 firmwares
+ * is to only have the vdev resource entry and an optional trace entry.
+ * The exact size could be computed based on resource table address, but
+ * the hard-coded value suffices to support the IPC-only mode.
+ */
+ *rsc_table_sz = 256;
+ return (struct resource_table *)kproc->rmem[0].cpu_addr;
+}
+EXPORT_SYMBOL_GPL(k3_get_loaded_rsc_table);
+
+/*
+ * Custom function to translate a remote processor device address (internal
+ * RAMs only) to a kernel virtual address. The remote processors can access
+ * their RAMs at either an internal address visible only from a remote
+ * processor, or at the SoC-level bus address. Both these addresses need to be
+ * looked through for translation. The translated addresses can be used either
+ * by the remoteproc core for loading (when using kernel remoteproc loader), or
+ * by any rpmsg bus drivers.
+ */
+void *k3_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ void __iomem *va = NULL;
+ phys_addr_t bus_addr;
+ u32 dev_addr, offset;
+ size_t size;
+ int i;
+
+ if (len == 0)
+ return NULL;
+
+ for (i = 0; i < kproc->num_mems; i++) {
+ bus_addr = kproc->mem[i].bus_addr;
+ dev_addr = kproc->mem[i].dev_addr;
+ size = kproc->mem[i].size;
+
+ if (da < KEYSTONE_RPROC_LOCAL_ADDRESS_MASK) {
+ /* handle remote-view addresses */
+ if (da >= dev_addr &&
+ ((da + len) <= (dev_addr + size))) {
+ offset = da - dev_addr;
+ va = kproc->mem[i].cpu_addr + offset;
+ return (__force void *)va;
+ }
+ } else {
+ /* handle SoC-view addresses */
+ if (da >= bus_addr &&
+ (da + len) <= (bus_addr + size)) {
+ offset = da - bus_addr;
+ va = kproc->mem[i].cpu_addr + offset;
+ return (__force void *)va;
+ }
+ }
+ }
+
+ /* handle static DDR reserved memory regions */
+ for (i = 0; i < kproc->num_rmems; i++) {
+ dev_addr = kproc->rmem[i].dev_addr;
+ size = kproc->rmem[i].size;
+
+ if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
+ offset = da - dev_addr;
+ va = kproc->rmem[i].cpu_addr + offset;
+ return (__force void *)va;
+ }
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_da_to_va);
+
+int k3_rproc_of_get_memories(struct platform_device *pdev,
+ struct k3_rproc *kproc)
+{
+ const struct k3_rproc_dev_data *data = kproc->data;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ int num_mems = 0;
+ int i;
+
+ num_mems = kproc->data->num_mems;
+ kproc->mem = devm_kcalloc(kproc->dev, num_mems,
+ sizeof(*kproc->mem), GFP_KERNEL);
+ if (!kproc->mem)
+ return -ENOMEM;
+
+ for (i = 0; i < num_mems; i++) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ data->mems[i].name);
+ if (!res) {
+ dev_err(dev, "found no memory resource for %s\n",
+ data->mems[i].name);
+ return -EINVAL;
+ }
+ if (!devm_request_mem_region(dev, res->start,
+ resource_size(res),
+ dev_name(dev))) {
+ dev_err(dev, "could not request %s region for resource\n",
+ data->mems[i].name);
+ return -EBUSY;
+ }
+
+ kproc->mem[i].cpu_addr = devm_ioremap_wc(dev, res->start,
+ resource_size(res));
+ if (!kproc->mem[i].cpu_addr) {
+ dev_err(dev, "failed to map %s memory\n",
+ data->mems[i].name);
+ return -ENOMEM;
+ }
+ kproc->mem[i].bus_addr = res->start;
+ kproc->mem[i].dev_addr = data->mems[i].dev_addr;
+ kproc->mem[i].size = resource_size(res);
+
+ dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %pK da 0x%x\n",
+ data->mems[i].name, &kproc->mem[i].bus_addr,
+ kproc->mem[i].size, kproc->mem[i].cpu_addr,
+ kproc->mem[i].dev_addr);
+ }
+ kproc->num_mems = num_mems;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_of_get_memories);
+
+int k3_reserved_mem_init(struct k3_rproc *kproc)
+{
+ struct device *dev = kproc->dev;
+ struct device_node *np = dev->of_node;
+ struct device_node *rmem_np;
+ struct reserved_mem *rmem;
+ int num_rmems;
+ int ret, i;
+
+ num_rmems = of_property_count_elems_of_size(np, "memory-region",
+ sizeof(phandle));
+ if (num_rmems <= 0) {
+ dev_err(dev, "device does not reserved memory regions, ret = %d\n",
+ num_rmems);
+ return -EINVAL;
+ }
+ if (num_rmems < 2) {
+ dev_err(dev, "device needs at least two memory regions to be defined, num = %d\n",
+ num_rmems);
+ return -EINVAL;
+ }
+
+ /* use reserved memory region 0 for vring DMA allocations */
+ ret = of_reserved_mem_device_init_by_idx(dev, np, 0);
+ if (ret) {
+ dev_err(dev, "device cannot initialize DMA pool, ret = %d\n",
+ ret);
+ return ret;
+ }
+
+ num_rmems--;
+ kproc->rmem = kcalloc(num_rmems, sizeof(*kproc->rmem), GFP_KERNEL);
+ if (!kproc->rmem) {
+ ret = -ENOMEM;
+ goto release_rmem;
+ }
+
+ /* use remaining reserved memory regions for static carveouts */
+ for (i = 0; i < num_rmems; i++) {
+ rmem_np = of_parse_phandle(np, "memory-region", i + 1);
+ if (!rmem_np) {
+ ret = -EINVAL;
+ goto unmap_rmem;
+ }
+
+ rmem = of_reserved_mem_lookup(rmem_np);
+ if (!rmem) {
+ of_node_put(rmem_np);
+ ret = -EINVAL;
+ goto unmap_rmem;
+ }
+ of_node_put(rmem_np);
+
+ kproc->rmem[i].bus_addr = rmem->base;
+ /* 64-bit address regions currently not supported */
+ kproc->rmem[i].dev_addr = (u32)rmem->base;
+ kproc->rmem[i].size = rmem->size;
+ kproc->rmem[i].cpu_addr = ioremap_wc(rmem->base, rmem->size);
+ if (!kproc->rmem[i].cpu_addr) {
+ dev_err(dev, "failed to map reserved memory#%d at %pa of size %pa\n",
+ i + 1, &rmem->base, &rmem->size);
+ ret = -ENOMEM;
+ goto unmap_rmem;
+ }
+
+ dev_dbg(dev, "reserved memory%d: bus addr %pa size 0x%zx va %pK da 0x%x\n",
+ i + 1, &kproc->rmem[i].bus_addr,
+ kproc->rmem[i].size, kproc->rmem[i].cpu_addr,
+ kproc->rmem[i].dev_addr);
+ }
+ kproc->num_rmems = num_rmems;
+
+ return 0;
+
+unmap_rmem:
+ for (i--; i >= 0; i--)
+ iounmap(kproc->rmem[i].cpu_addr);
+ kfree(kproc->rmem);
+release_rmem:
+ of_reserved_mem_device_release(kproc->dev);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(k3_reserved_mem_init);
+
+void k3_reserved_mem_exit(struct k3_rproc *kproc)
+{
+ int i;
+
+ for (i = 0; i < kproc->num_rmems; i++)
+ iounmap(kproc->rmem[i].cpu_addr);
+ kfree(kproc->rmem);
+
+ of_reserved_mem_device_release(kproc->dev);
+}
+EXPORT_SYMBOL_GPL(k3_reserved_mem_exit);
+
+struct ti_sci_proc *k3_rproc_of_get_tsp(struct device *dev,
+ const struct ti_sci_handle *sci)
+{
+ struct ti_sci_proc *tsp;
+ u32 temp[2];
+ int ret;
+
+ ret = of_property_read_u32_array(dev->of_node, "ti,sci-proc-ids",
+ temp, 2);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ tsp = kzalloc(sizeof(*tsp), GFP_KERNEL);
+ if (!tsp)
+ return ERR_PTR(-ENOMEM);
+
+ tsp->dev = dev;
+ tsp->sci = sci;
+ tsp->ops = &sci->ops.proc_ops;
+ tsp->proc_id = temp[0];
+ tsp->host_id = temp[1];
+
+ return tsp;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_of_get_tsp);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI K3 common Remoteproc support");
diff --git a/drivers/remoteproc/ti_k3_common.h b/drivers/remoteproc/ti_k3_common.h
new file mode 100644
index 000000000000..312df2ab3cd2
--- /dev/null
+++ b/drivers/remoteproc/ti_k3_common.h
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * TI K3 Remote Processor(s) driver common code
+ *
+ * Refactored from ti_k3_dsp_remoteproc.c.
+ *
+ * ti_k3_dsp_remoteproc.c:
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ * Suman Anna <s-anna@ti.com>
+ */
+
+#ifndef REMOTEPROC_TI_K3_COMMON_H
+#define REMOTEPROC_TI_K3_COMMON_H
+
+#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
+
+/**
+ * struct k3_rproc_mem - internal memory structure
+ * @cpu_addr: MPU virtual address of the memory region
+ * @bus_addr: Bus address used to access the memory region
+ * @dev_addr: Device address of the memory region from DSP view
+ * @size: Size of the memory region
+ */
+struct k3_rproc_mem {
+ void __iomem *cpu_addr;
+ phys_addr_t bus_addr;
+ u32 dev_addr;
+ size_t size;
+};
+
+/**
+ * struct k3_rproc_mem_data - memory definitions for a DSP
+ * @name: name for this memory entry
+ * @dev_addr: device address for the memory entry
+ */
+struct k3_rproc_mem_data {
+ const char *name;
+ const u32 dev_addr;
+};
+
+/**
+ * struct k3_rproc_dev_data - device data structure for a DSP
+ * @mems: pointer to memory definitions for a DSP
+ * @num_mems: number of memory regions in @mems
+ * @boot_align_addr: boot vector address alignment granularity
+ * @uses_lreset: flag to denote the need for local reset management
+ */
+struct k3_rproc_dev_data {
+ const struct k3_rproc_mem_data *mems;
+ u32 num_mems;
+ u32 boot_align_addr;
+ bool uses_lreset;
+};
+
+/**
+ * struct k3_rproc - k3 remote processor driver structure
+ * @dev: cached device pointer
+ * @rproc: remoteproc device handle
+ * @mem: internal memory regions data
+ * @num_mems: number of internal memory regions
+ * @rmem: reserved memory regions data
+ * @num_rmems: number of reserved memory regions
+ * @reset: reset control handle
+ * @data: pointer to device data
+ * @tsp: TI-SCI processor control handle
+ * @ti_sci: TI-SCI handle
+ * @ti_sci_id: TI-SCI device identifier
+ * @mbox: mailbox channel handle
+ * @client: mailbox client to request the mailbox channel
+ * @ipc_only: flag to indicate IPC-only mode
+ */
+struct k3_rproc {
+ struct device *dev;
+ struct rproc *rproc;
+ struct k3_rproc_mem *mem;
+ int num_mems;
+ struct k3_rproc_mem *rmem;
+ int num_rmems;
+ struct reset_control *reset;
+ const struct k3_rproc_dev_data *data;
+ struct ti_sci_proc *tsp;
+ const struct ti_sci_handle *ti_sci;
+ u32 ti_sci_id;
+ struct mbox_chan *mbox;
+ struct mbox_client client;
+};
+
+void k3_rproc_kick(struct rproc *rproc, int vqid);
+int k3_rproc_reset(struct k3_rproc *kproc);
+int k3_rproc_release(struct k3_rproc *kproc);
+struct resource_table *k3_get_loaded_rsc_table(struct rproc *rproc,
+ size_t *rsc_table_sz);
+void *k3_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len,
+ bool *is_iomem);
+int k3_rproc_of_get_memories(struct platform_device *pdev,
+ struct k3_rproc *kproc);
+int k3_reserved_mem_init(struct k3_rproc *kproc);
+void k3_reserved_mem_exit(struct k3_rproc *kproc);
+struct ti_sci_proc *k3_rproc_of_get_tsp(struct device *dev,
+ const struct ti_sci_handle *sci);
+
+#endif /* REMOTEPROC_TI_K3_COMMON_H */
diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
index eb9c64f7b9b4..006fd444badb 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -20,78 +20,7 @@
#include "omap_remoteproc.h"
#include "remoteproc_internal.h"
#include "ti_sci_proc.h"
-
-#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
-
-/**
- * struct k3_dsp_mem - internal memory structure
- * @cpu_addr: MPU virtual address of the memory region
- * @bus_addr: Bus address used to access the memory region
- * @dev_addr: Device address of the memory region from DSP view
- * @size: Size of the memory region
- */
-struct k3_dsp_mem {
- void __iomem *cpu_addr;
- phys_addr_t bus_addr;
- u32 dev_addr;
- size_t size;
-};
-
-/**
- * struct k3_dsp_mem_data - memory definitions for a DSP
- * @name: name for this memory entry
- * @dev_addr: device address for the memory entry
- */
-struct k3_dsp_mem_data {
- const char *name;
- const u32 dev_addr;
-};
-
-/**
- * struct k3_dsp_dev_data - device data structure for a DSP
- * @mems: pointer to memory definitions for a DSP
- * @num_mems: number of memory regions in @mems
- * @boot_align_addr: boot vector address alignment granularity
- * @uses_lreset: flag to denote the need for local reset management
- */
-struct k3_dsp_dev_data {
- const struct k3_dsp_mem_data *mems;
- u32 num_mems;
- u32 boot_align_addr;
- bool uses_lreset;
-};
-
-/**
- * struct k3_dsp_rproc - k3 DSP remote processor driver structure
- * @dev: cached device pointer
- * @rproc: remoteproc device handle
- * @mem: internal memory regions data
- * @num_mems: number of internal memory regions
- * @rmem: reserved memory regions data
- * @num_rmems: number of reserved memory regions
- * @reset: reset control handle
- * @data: pointer to DSP-specific device data
- * @tsp: TI-SCI processor control handle
- * @ti_sci: TI-SCI handle
- * @ti_sci_id: TI-SCI device identifier
- * @mbox: mailbox channel handle
- * @client: mailbox client to request the mailbox channel
- */
-struct k3_dsp_rproc {
- struct device *dev;
- struct rproc *rproc;
- struct k3_dsp_mem *mem;
- int num_mems;
- struct k3_dsp_mem *rmem;
- int num_rmems;
- struct reset_control *reset;
- const struct k3_dsp_dev_data *data;
- struct ti_sci_proc *tsp;
- const struct ti_sci_handle *ti_sci;
- u32 ti_sci_id;
- struct mbox_chan *mbox;
- struct mbox_client client;
-};
+#include "ti_k3_common.h"

/**
* k3_dsp_rproc_mbox_callback() - inbound mailbox message handler
@@ -109,7 +38,7 @@ struct k3_dsp_rproc {
*/
static void k3_dsp_rproc_mbox_callback(struct mbox_client *client, void *data)
{
- struct k3_dsp_rproc *kproc = container_of(client, struct k3_dsp_rproc,
+ struct k3_rproc *kproc = container_of(client, struct k3_rproc,
client);
struct device *dev = kproc->rproc->dev.parent;
const char *name = kproc->rproc->name;
@@ -142,83 +71,9 @@ static void k3_dsp_rproc_mbox_callback(struct mbox_client *client, void *data)
}
}

-/*
- * Kick the remote processor to notify about pending unprocessed messages.
- * The vqid usage is not used and is inconsequential, as the kick is performed
- * through a simulated GPIO (a bit in an IPC interrupt-triggering register),
- * the remote processor is expected to process both its Tx and Rx virtqueues.
- */
-static void k3_dsp_rproc_kick(struct rproc *rproc, int vqid)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- struct device *dev = rproc->dev.parent;
- mbox_msg_t msg = (mbox_msg_t)vqid;
- int ret;
-
- /* send the index of the triggered virtqueue in the mailbox payload */
- ret = mbox_send_message(kproc->mbox, (void *)msg);
- if (ret < 0)
- dev_err(dev, "failed to send mailbox message, status = %d\n",
- ret);
-}
-
-/* Put the DSP processor into reset */
-static int k3_dsp_rproc_reset(struct k3_dsp_rproc *kproc)
-{
- struct device *dev = kproc->dev;
- int ret;
-
- ret = reset_control_assert(kproc->reset);
- if (ret) {
- dev_err(dev, "local-reset assert failed, ret = %d\n", ret);
- return ret;
- }
-
- if (kproc->data->uses_lreset)
- return ret;
-
- ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
- kproc->ti_sci_id);
- if (ret) {
- dev_err(dev, "module-reset assert failed, ret = %d\n", ret);
- if (reset_control_deassert(kproc->reset))
- dev_warn(dev, "local-reset deassert back failed\n");
- }
-
- return ret;
-}
-
-/* Release the DSP processor from reset */
-static int k3_dsp_rproc_release(struct k3_dsp_rproc *kproc)
-{
- struct device *dev = kproc->dev;
- int ret;
-
- if (kproc->data->uses_lreset)
- goto lreset;
-
- ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
- kproc->ti_sci_id);
- if (ret) {
- dev_err(dev, "module-reset deassert failed, ret = %d\n", ret);
- return ret;
- }
-
-lreset:
- ret = reset_control_deassert(kproc->reset);
- if (ret) {
- dev_err(dev, "local-reset deassert failed, ret = %d\n", ret);
- if (kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
- kproc->ti_sci_id))
- dev_warn(dev, "module-reset assert back failed\n");
- }
-
- return ret;
-}
-
static int k3_dsp_rproc_request_mbox(struct rproc *rproc)
{
- struct k3_dsp_rproc *kproc = rproc->priv;
+ struct k3_rproc *kproc = rproc->priv;
struct mbox_client *client = &kproc->client;
struct device *dev = kproc->dev;
int ret;
@@ -253,6 +108,7 @@ static int k3_dsp_rproc_request_mbox(struct rproc *rproc)

return 0;
}
+
/*
* The C66x DSP cores have a local reset that affects only the CPU, and a
* generic module reset that powers on the device and allows the DSP internal
@@ -265,7 +121,7 @@ static int k3_dsp_rproc_request_mbox(struct rproc *rproc)
*/
static int k3_dsp_rproc_prepare(struct rproc *rproc)
{
- struct k3_dsp_rproc *kproc = rproc->priv;
+ struct k3_rproc *kproc = rproc->priv;
struct device *dev = kproc->dev;
int ret;

@@ -289,7 +145,7 @@ static int k3_dsp_rproc_prepare(struct rproc *rproc)
*/
static int k3_dsp_rproc_unprepare(struct rproc *rproc)
{
- struct k3_dsp_rproc *kproc = rproc->priv;
+ struct k3_rproc *kproc = rproc->priv;
struct device *dev = kproc->dev;
int ret;

@@ -310,7 +166,7 @@ static int k3_dsp_rproc_unprepare(struct rproc *rproc)
*/
static int k3_dsp_rproc_start(struct rproc *rproc)
{
- struct k3_dsp_rproc *kproc = rproc->priv;
+ struct k3_rproc *kproc = rproc->priv;
struct device *dev = kproc->dev;
u32 boot_addr;
int ret;
@@ -332,7 +188,7 @@ static int k3_dsp_rproc_start(struct rproc *rproc)
if (ret)
goto put_mbox;

- ret = k3_dsp_rproc_release(kproc);
+ ret = k3_rproc_release(kproc);
if (ret)
goto put_mbox;

@@ -351,11 +207,11 @@ static int k3_dsp_rproc_start(struct rproc *rproc)
*/
static int k3_dsp_rproc_stop(struct rproc *rproc)
{
- struct k3_dsp_rproc *kproc = rproc->priv;
+ struct k3_rproc *kproc = rproc->priv;

mbox_free_channel(kproc->mbox);

- k3_dsp_rproc_reset(kproc);
+ k3_rproc_reset(kproc);

return 0;
}
@@ -370,7 +226,7 @@ static int k3_dsp_rproc_stop(struct rproc *rproc)
*/
static int k3_dsp_rproc_attach(struct rproc *rproc)
{
- struct k3_dsp_rproc *kproc = rproc->priv;
+ struct k3_rproc *kproc = rproc->priv;
struct device *dev = kproc->dev;
int ret;

@@ -392,7 +248,7 @@ static int k3_dsp_rproc_attach(struct rproc *rproc)
*/
static int k3_dsp_rproc_detach(struct rproc *rproc)
{
- struct k3_dsp_rproc *kproc = rproc->priv;
+ struct k3_rproc *kproc = rproc->priv;
struct device *dev = kproc->dev;

mbox_free_channel(kproc->mbox);
@@ -400,282 +256,20 @@ static int k3_dsp_rproc_detach(struct rproc *rproc)
return 0;
}

-/*
- * This function implements the .get_loaded_rsc_table() callback and is used
- * to provide the resource table for a booted DSP in IPC-only mode. The K3 DSP
- * firmwares follow a design-by-contract approach and are expected to have the
- * resource table at the base of the DDR region reserved for firmware usage.
- * This provides flexibility for the remote processor to be booted by different
- * bootloaders that may or may not have the ability to publish the resource table
- * address and size through a DT property. This callback is invoked only in
- * IPC-only mode.
- */
-static struct resource_table *k3_dsp_get_loaded_rsc_table(struct rproc *rproc,
- size_t *rsc_table_sz)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- struct device *dev = kproc->dev;
-
- if (!kproc->rmem[0].cpu_addr) {
- dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
- return ERR_PTR(-ENOMEM);
- }
-
- /*
- * NOTE: The resource table size is currently hard-coded to a maximum
- * of 256 bytes. The most common resource table usage for K3 firmwares
- * is to only have the vdev resource entry and an optional trace entry.
- * The exact size could be computed based on resource table address, but
- * the hard-coded value suffices to support the IPC-only mode.
- */
- *rsc_table_sz = 256;
- return (struct resource_table *)kproc->rmem[0].cpu_addr;
-}
-
-/*
- * Custom function to translate a DSP device address (internal RAMs only) to a
- * kernel virtual address. The DSPs can access their RAMs at either an internal
- * address visible only from a DSP, or at the SoC-level bus address. Both these
- * addresses need to be looked through for translation. The translated addresses
- * can be used either by the remoteproc core for loading (when using kernel
- * remoteproc loader), or by any rpmsg bus drivers.
- */
-static void *k3_dsp_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- void __iomem *va = NULL;
- phys_addr_t bus_addr;
- u32 dev_addr, offset;
- size_t size;
- int i;
-
- if (len == 0)
- return NULL;
-
- for (i = 0; i < kproc->num_mems; i++) {
- bus_addr = kproc->mem[i].bus_addr;
- dev_addr = kproc->mem[i].dev_addr;
- size = kproc->mem[i].size;
-
- if (da < KEYSTONE_RPROC_LOCAL_ADDRESS_MASK) {
- /* handle DSP-view addresses */
- if (da >= dev_addr &&
- ((da + len) <= (dev_addr + size))) {
- offset = da - dev_addr;
- va = kproc->mem[i].cpu_addr + offset;
- return (__force void *)va;
- }
- } else {
- /* handle SoC-view addresses */
- if (da >= bus_addr &&
- (da + len) <= (bus_addr + size)) {
- offset = da - bus_addr;
- va = kproc->mem[i].cpu_addr + offset;
- return (__force void *)va;
- }
- }
- }
-
- /* handle static DDR reserved memory regions */
- for (i = 0; i < kproc->num_rmems; i++) {
- dev_addr = kproc->rmem[i].dev_addr;
- size = kproc->rmem[i].size;
-
- if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
- offset = da - dev_addr;
- va = kproc->rmem[i].cpu_addr + offset;
- return (__force void *)va;
- }
- }
-
- return NULL;
-}

static const struct rproc_ops k3_dsp_rproc_ops = {
.start = k3_dsp_rproc_start,
.stop = k3_dsp_rproc_stop,
- .kick = k3_dsp_rproc_kick,
- .da_to_va = k3_dsp_rproc_da_to_va,
+ .kick = k3_rproc_kick,
+ .da_to_va = k3_rproc_da_to_va,
};

-static int k3_dsp_rproc_of_get_memories(struct platform_device *pdev,
- struct k3_dsp_rproc *kproc)
-{
- const struct k3_dsp_dev_data *data = kproc->data;
- struct device *dev = &pdev->dev;
- struct resource *res;
- int num_mems = 0;
- int i;
-
- num_mems = kproc->data->num_mems;
- kproc->mem = devm_kcalloc(kproc->dev, num_mems,
- sizeof(*kproc->mem), GFP_KERNEL);
- if (!kproc->mem)
- return -ENOMEM;
-
- for (i = 0; i < num_mems; i++) {
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
- data->mems[i].name);
- if (!res) {
- dev_err(dev, "found no memory resource for %s\n",
- data->mems[i].name);
- return -EINVAL;
- }
- if (!devm_request_mem_region(dev, res->start,
- resource_size(res),
- dev_name(dev))) {
- dev_err(dev, "could not request %s region for resource\n",
- data->mems[i].name);
- return -EBUSY;
- }
-
- kproc->mem[i].cpu_addr = devm_ioremap_wc(dev, res->start,
- resource_size(res));
- if (!kproc->mem[i].cpu_addr) {
- dev_err(dev, "failed to map %s memory\n",
- data->mems[i].name);
- return -ENOMEM;
- }
- kproc->mem[i].bus_addr = res->start;
- kproc->mem[i].dev_addr = data->mems[i].dev_addr;
- kproc->mem[i].size = resource_size(res);
-
- dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %pK da 0x%x\n",
- data->mems[i].name, &kproc->mem[i].bus_addr,
- kproc->mem[i].size, kproc->mem[i].cpu_addr,
- kproc->mem[i].dev_addr);
- }
- kproc->num_mems = num_mems;
-
- return 0;
-}
-
-static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc *kproc)
-{
- struct device *dev = kproc->dev;
- struct device_node *np = dev->of_node;
- struct device_node *rmem_np;
- struct reserved_mem *rmem;
- int num_rmems;
- int ret, i;
-
- num_rmems = of_property_count_elems_of_size(np, "memory-region",
- sizeof(phandle));
- if (num_rmems <= 0) {
- dev_err(dev, "device does not reserved memory regions, ret = %d\n",
- num_rmems);
- return -EINVAL;
- }
- if (num_rmems < 2) {
- dev_err(dev, "device needs at least two memory regions to be defined, num = %d\n",
- num_rmems);
- return -EINVAL;
- }
-
- /* use reserved memory region 0 for vring DMA allocations */
- ret = of_reserved_mem_device_init_by_idx(dev, np, 0);
- if (ret) {
- dev_err(dev, "device cannot initialize DMA pool, ret = %d\n",
- ret);
- return ret;
- }
-
- num_rmems--;
- kproc->rmem = kcalloc(num_rmems, sizeof(*kproc->rmem), GFP_KERNEL);
- if (!kproc->rmem) {
- ret = -ENOMEM;
- goto release_rmem;
- }
-
- /* use remaining reserved memory regions for static carveouts */
- for (i = 0; i < num_rmems; i++) {
- rmem_np = of_parse_phandle(np, "memory-region", i + 1);
- if (!rmem_np) {
- ret = -EINVAL;
- goto unmap_rmem;
- }
-
- rmem = of_reserved_mem_lookup(rmem_np);
- if (!rmem) {
- of_node_put(rmem_np);
- ret = -EINVAL;
- goto unmap_rmem;
- }
- of_node_put(rmem_np);
-
- kproc->rmem[i].bus_addr = rmem->base;
- /* 64-bit address regions currently not supported */
- kproc->rmem[i].dev_addr = (u32)rmem->base;
- kproc->rmem[i].size = rmem->size;
- kproc->rmem[i].cpu_addr = ioremap_wc(rmem->base, rmem->size);
- if (!kproc->rmem[i].cpu_addr) {
- dev_err(dev, "failed to map reserved memory#%d at %pa of size %pa\n",
- i + 1, &rmem->base, &rmem->size);
- ret = -ENOMEM;
- goto unmap_rmem;
- }
-
- dev_dbg(dev, "reserved memory%d: bus addr %pa size 0x%zx va %pK da 0x%x\n",
- i + 1, &kproc->rmem[i].bus_addr,
- kproc->rmem[i].size, kproc->rmem[i].cpu_addr,
- kproc->rmem[i].dev_addr);
- }
- kproc->num_rmems = num_rmems;
-
- return 0;
-
-unmap_rmem:
- for (i--; i >= 0; i--)
- iounmap(kproc->rmem[i].cpu_addr);
- kfree(kproc->rmem);
-release_rmem:
- of_reserved_mem_device_release(kproc->dev);
- return ret;
-}
-
-static void k3_dsp_reserved_mem_exit(struct k3_dsp_rproc *kproc)
-{
- int i;
-
- for (i = 0; i < kproc->num_rmems; i++)
- iounmap(kproc->rmem[i].cpu_addr);
- kfree(kproc->rmem);
-
- of_reserved_mem_device_release(kproc->dev);
-}
-
-static
-struct ti_sci_proc *k3_dsp_rproc_of_get_tsp(struct device *dev,
- const struct ti_sci_handle *sci)
-{
- struct ti_sci_proc *tsp;
- u32 temp[2];
- int ret;
-
- ret = of_property_read_u32_array(dev->of_node, "ti,sci-proc-ids",
- temp, 2);
- if (ret < 0)
- return ERR_PTR(ret);
-
- tsp = kzalloc(sizeof(*tsp), GFP_KERNEL);
- if (!tsp)
- return ERR_PTR(-ENOMEM);
-
- tsp->dev = dev;
- tsp->sci = sci;
- tsp->ops = &sci->ops.proc_ops;
- tsp->proc_id = temp[0];
- tsp->host_id = temp[1];
-
- return tsp;
-}
-
static int k3_dsp_rproc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
- const struct k3_dsp_dev_data *data;
- struct k3_dsp_rproc *kproc;
+ const struct k3_rproc_dev_data *data;
+ struct k3_rproc *kproc;
struct rproc *rproc;
const char *fw_name;
bool p_state = false;
@@ -733,7 +327,7 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)
goto put_sci;
}

- kproc->tsp = k3_dsp_rproc_of_get_tsp(dev, kproc->ti_sci);
+ kproc->tsp = k3_rproc_of_get_tsp(dev, kproc->ti_sci);
if (IS_ERR(kproc->tsp)) {
dev_err(dev, "failed to construct ti-sci proc control, ret = %d\n",
ret);
@@ -747,11 +341,11 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)
goto free_tsp;
}

- ret = k3_dsp_rproc_of_get_memories(pdev, kproc);
+ ret = k3_rproc_of_get_memories(pdev, kproc);
if (ret)
goto release_tsp;

- ret = k3_dsp_reserved_mem_init(kproc);
+ ret = k3_reserved_mem_init(kproc);
if (ret) {
dev_err(dev, "reserved memory init failed, ret = %d\n", ret);
goto release_tsp;
@@ -776,7 +370,7 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)
rproc->ops->stop = NULL;
rproc->ops->attach = k3_dsp_rproc_attach;
rproc->ops->detach = k3_dsp_rproc_detach;
- rproc->ops->get_loaded_rsc_table = k3_dsp_get_loaded_rsc_table;
+ rproc->ops->get_loaded_rsc_table = k3_get_loaded_rsc_table;
} else {
dev_info(dev, "configured DSP for remoteproc mode\n");
/*
@@ -792,7 +386,7 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)
goto release_mem;
} else if (ret == 0) {
dev_warn(dev, "local reset is deasserted for device\n");
- k3_dsp_rproc_reset(kproc);
+ k3_rproc_reset(kproc);
}
}
}
@@ -809,7 +403,7 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)
return 0;

release_mem:
- k3_dsp_reserved_mem_exit(kproc);
+ k3_reserved_mem_exit(kproc);
release_tsp:
ret1 = ti_sci_proc_release(kproc->tsp);
if (ret1)
@@ -827,7 +421,7 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)

static int k3_dsp_rproc_remove(struct platform_device *pdev)
{
- struct k3_dsp_rproc *kproc = platform_get_drvdata(pdev);
+ struct k3_rproc *kproc = platform_get_drvdata(pdev);
struct rproc *rproc = kproc->rproc;
struct device *dev = &pdev->dev;
int ret;
@@ -852,32 +446,32 @@ static int k3_dsp_rproc_remove(struct platform_device *pdev)
if (ret)
dev_err(dev, "failed to put ti_sci handle, ret = %d\n", ret);

- k3_dsp_reserved_mem_exit(kproc);
+ k3_reserved_mem_exit(kproc);
rproc_free(kproc->rproc);

return 0;
}

-static const struct k3_dsp_mem_data c66_mems[] = {
+static const struct k3_rproc_mem_data c66_mems[] = {
{ .name = "l2sram", .dev_addr = 0x800000 },
{ .name = "l1pram", .dev_addr = 0xe00000 },
{ .name = "l1dram", .dev_addr = 0xf00000 },
};

/* C71x cores only have a L1P Cache, there are no L1P SRAMs */
-static const struct k3_dsp_mem_data c71_mems[] = {
+static const struct k3_rproc_mem_data c71_mems[] = {
{ .name = "l2sram", .dev_addr = 0x800000 },
{ .name = "l1dram", .dev_addr = 0xe00000 },
};

-static const struct k3_dsp_dev_data c66_data = {
+static const struct k3_rproc_dev_data c66_data = {
.mems = c66_mems,
.num_mems = ARRAY_SIZE(c66_mems),
.boot_align_addr = SZ_1K,
.uses_lreset = true,
};

-static const struct k3_dsp_dev_data c71_data = {
+static const struct k3_rproc_dev_data c71_data = {
.mems = c71_mems,
.num_mems = ARRAY_SIZE(c71_mems),
.boot_align_addr = SZ_2M,
--
2.39.1