[PATCH 6/7] remoteproc: Add Xilinx ZynqMP R5 remoteproc

Wendy Liang
2018-08-16T07:06:29Z

There are cortex-r5 processors in Xilinx Zynq UltraScale+
MPSoC platforms. This remoteproc driver is to manage the
R5 processors.

Signed-off-by: Wendy Liang <jliang@xilinx.com>
---
drivers/remoteproc/Kconfig | 9 +
drivers/remoteproc/Makefile | 1 +
drivers/remoteproc/zynqmp_r5_remoteproc.c | 692 ++++++++++++++++++++++++++++++
3 files changed, 702 insertions(+)
create mode 100644 drivers/remoteproc/zynqmp_r5_remoteproc.c

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index cd1c168..83aac63 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -158,6 +158,15 @@ config ST_REMOTEPROC
config ST_SLIM_REMOTEPROC
tristate

+config ZYNQMP_R5_REMOTEPROC
+ tristate "ZynqMP_r5 remoteproc support"
+ depends on ARM64 && PM && ARCH_ZYNQMP
+ select RPMSG_VIRTIO
+ select ZYNQMP_FIRMWARE
+ help
+ Say y here to support ZynqMP R5 remote processors via the remote
+ processor framework.
+
endif # REMOTEPROC

endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 02627ed..147923c 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -23,3 +23,4 @@ qcom_wcnss_pil-y += qcom_wcnss.o
qcom_wcnss_pil-y += qcom_wcnss_iris.o
obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o
obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o
+obj-$(CONFIG_ZYNQMP_R5_REMOTEPROC) += zynqmp_r5_remoteproc.o
diff --git a/drivers/remoteproc/zynqmp_r5_remoteproc.c b/drivers/remoteproc/zynqmp_r5_remoteproc.c
new file mode 100644
index 0000000..7fc3718
--- /dev/null
+++ b/drivers/remoteproc/zynqmp_r5_remoteproc.c
@@ -0,0 +1,692 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Zynq R5 Remote Processor driver
+ *
+ * Copyright (C) 2015 Xilinx, Inc.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/remoteproc.h>
+#include <linux/interrupt.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/slab.h>
+#include <linux/cpu.h>
+#include <linux/delay.h>
+#include <linux/list.h>
+#include <linux/genalloc.h>
+#include <linux/pfn.h>
+#include <linux/idr.h>
+#include <linux/firmware/xlnx-zynqmp.h>
+
+#include "remoteproc_internal.h"
+
+/* IPI reg offsets */
+#define TRIG_OFFSET 0x00000000
+#define OBS_OFFSET 0x00000004
+#define ISR_OFFSET 0x00000010
+#define IMR_OFFSET 0x00000014
+#define IER_OFFSET 0x00000018
+#define IDR_OFFSET 0x0000001C
+#define IPI_ALL_MASK 0x0F0F0301
+
+/* RPU IPI mask */
+#define RPU_IPI_INIT_MASK 0x00000100
+#define RPU_IPI_MASK(n) (RPU_IPI_INIT_MASK << (n))
+#define RPU_0_IPI_MASK RPU_IPI_MASK(0)
+#define RPU_1_IPI_MASK RPU_IPI_MASK(1)
+
+/* PM proc states */
+#define PM_PROC_STATE_ACTIVE 1u
+
+/* Maximum TCM power nodes IDs */
+#define MAX_TCM_PNODES 4
+
+/* Register access macros */
+#define reg_read(base, reg) \
+ readl(((void __iomem *)(base)) + (reg))
+#define reg_write(base, reg, val) \
+ writel((val), ((void __iomem *)(base)) + (reg))
+
+#define DEFAULT_FIRMWARE_NAME "rproc-rpu-fw"
+
+static bool autoboot __read_mostly;
+
+struct zynqmp_r5_rproc_pdata;
+
+/**
+ * struct zynqmp_r5_rproc_pdata - zynqmp rpu remote processor instance state
+ * @rproc: rproc handle
+ * @workqueue: workqueue for the RPU remoteproc
+ * @ipi_base: virt ptr to IPI channel address registers for APU
+ * @rpu_mode: RPU core configuration
+ * @rpu_id: RPU CPU id
+ * @rpu_pnode_id: RPU CPU power domain id
+ * @mem_pools: list of gen_pool for firmware mmio_sram memory and their
+ * power domain IDs
+ * @mems: list of rproc_mem_entries for firmware
+ * @irq: IRQ number
+ * @ipi_dest_mask: IPI destination mask for the IPI channel
+ */
+struct zynqmp_r5_rproc_pdata {
+ struct rproc *rproc;
+ struct work_struct workqueue;
+ void __iomem *ipi_base;
+ enum rpu_oper_mode rpu_mode;
+ struct list_head mems;
+ u32 ipi_dest_mask;
+ u32 rpu_id;
+ u32 rpu_pnode_id;
+ int irq;
+ u32 tcm_pnode_id[MAX_TCM_PNODES];
+};
+
+/**
+ * r5_boot_addr_config - configure the boot address of R5
+ * @pdata: platform data
+ * @bootmem: boot from LOVEC or HIVEC
+ *
+ * This function will set the RPU boot address
+ */
+static void r5_boot_addr_config(struct zynqmp_r5_rproc_pdata *pdata,
+ enum rpu_boot_mem bootmem)
+{
+ const struct zynqmp_eemi_ops *eemi = zynqmp_pm_get_eemi_ops();
+
+ pr_debug("%s: R5 ID: %d, boot_dev %d\n",
+ __func__, pdata->rpu_id, bootmem);
+
+ if (!eemi || !eemi->ioctl) {
+ pr_err("%s: no eemi ioctl operation.\n", __func__);
+ return;
+ }
+ eemi->ioctl(pdata->rpu_pnode_id, IOCTL_RPU_BOOT_ADDR_CONFIG,
+ bootmem, 0, NULL);
+}
+
+/**
+ * r5_mode_config - configure R5 operation mode
+ * @pdata: platform data
+ *
+ * configure R5 to split mode or lockstep mode
+ * based on the platform data.
+ */
+static void r5_mode_config(struct zynqmp_r5_rproc_pdata *pdata)
+{
+ const struct zynqmp_eemi_ops *eemi = zynqmp_pm_get_eemi_ops();
+
+ pr_debug("%s: mode: %d\n", __func__, pdata->rpu_mode);
+
+ if (!eemi || !eemi->ioctl) {
+ pr_err("%s: no eemi ioctl operation.\n", __func__);
+ return;
+ }
+ eemi->ioctl(pdata->rpu_pnode_id, IOCTL_SET_RPU_OPER_MODE,
+ pdata->rpu_mode, 0, NULL);
+}
+
+/**
+ * r5_release_tcm() - release TCM
+ * @pdata: platform data
+ *
+ * Release TCM
+ */
+static void r5_release_tcm(struct zynqmp_r5_rproc_pdata *pdata)
+{
+ const struct zynqmp_eemi_ops *eemi = zynqmp_pm_get_eemi_ops();
+ int i;
+
+ if (!eemi || !eemi->release_node) {
+ pr_err("Failed to release TCM\n");
+ return;
+ }
+
+ for (i = 0; i < MAX_TCM_PNODES; i++) {
+ if (pdata->tcm_pnode_id[i] != 0)
+ eemi->release_node(pdata->tcm_pnode_id[i]);
+ }
+}
+
+/**
+ * disable_ipi - disable IPI
+ * @pdata: platform data
+ *
+ * Disable IPI interrupt
+ */
+static inline void disable_ipi(struct zynqmp_r5_rproc_pdata *pdata)
+{
+ /* Disable R5 IPI interrupt */
+ if (pdata->ipi_base)
+ reg_write(pdata->ipi_base, IDR_OFFSET, pdata->ipi_dest_mask);
+}
+
+/**
+ * enable_ipi - enable IPI
+ * @pdata: platform data
+ *
+ * Enable IPI interrupt
+ */
+static inline void enable_ipi(struct zynqmp_r5_rproc_pdata *pdata)
+{
+ /* Enable R5 IPI interrupt */
+ if (pdata->ipi_base)
+ reg_write(pdata->ipi_base, IER_OFFSET, pdata->ipi_dest_mask);
+}
+
+/**
+ * event_notified_idr_cb - event notified idr callback
+ * @id: idr id
+ * @ptr: pointer to idr private data
+ * @data: data passed to idr_for_each callback
+ *
+ * Pass notification to remoteproc virtio
+ *
+ * @return: 0. having return is to satisfy the idr_for_each() function
+ * pointer input argument requirement.
+ */
+static int event_notified_idr_cb(int id, void *ptr, void *data)
+{
+ struct rproc *rproc = data;
+
+ (void)rproc_vq_interrupt(rproc, id);
+ return 0;
+}
+
+static void handle_event_notified(struct work_struct *work)
+{
+ struct rproc *rproc;
+ struct zynqmp_r5_rproc_pdata *local;
+
+ local = container_of(work, struct zynqmp_r5_rproc_pdata, workqueue);
+ rproc = local->rproc;
+ idr_for_each(&rproc->notifyids, event_notified_idr_cb, rproc);
+}
+
+static int zynqmp_r5_rproc_start(struct rproc *rproc)
+{
+ struct device *dev = rproc->dev.parent;
+ struct zynqmp_r5_rproc_pdata *local = rproc->priv;
+ enum rpu_boot_mem bootmem;
+ const struct zynqmp_eemi_ops *eemi = zynqmp_pm_get_eemi_ops();
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ if (!eemi || !eemi->force_powerdown ||
+ !eemi->request_wakeup) {
+ pr_err("Failed to start R5\n");
+ return -ENXIO;
+ }
+
+ /* Set up R5 */
+ if ((rproc->bootaddr & 0xF0000000) == 0xF0000000)
+ bootmem = PM_RPU_BOOTMEM_HIVEC;
+ else
+ bootmem = PM_RPU_BOOTMEM_LOVEC;
+ dev_info(dev, "RPU boot from %s.",
+ bootmem == PM_RPU_BOOTMEM_HIVEC ? "OCM" : "TCM");
+
+ r5_mode_config(local);
+ eemi->force_powerdown(local->rpu_pnode_id,
+ ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+ r5_boot_addr_config(local, bootmem);
+ /* Add delay before release from halt and reset */
+ usleep_range(400, 500);
+ eemi->request_wakeup(local->rpu_pnode_id,
+ 1, bootmem,
+ ZYNQMP_PM_REQUEST_ACK_NO);
+
+ /* Make sure IPI is enabled */
+ enable_ipi(local);
+
+ return 0;
+}
+
+/* kick a firmware */
+static void zynqmp_r5_rproc_kick(struct rproc *rproc, int vqid)
+{
+ struct device *dev = rproc->dev.parent;
+ struct zynqmp_r5_rproc_pdata *local = rproc->priv;
+
+ dev_dbg(dev, "KICK Firmware to start send messages vqid %d\n", vqid);
+
+ /*
+ * send irq to R5 firmware
+ * Currently vqid is not used because we only got one.
+ */
+ if (local->ipi_base)
+ reg_write(local->ipi_base, TRIG_OFFSET, local->ipi_dest_mask);
+}
+
+/* power off the remote processor */
+static int zynqmp_r5_rproc_stop(struct rproc *rproc)
+{
+ struct device *dev = rproc->dev.parent;
+ struct zynqmp_r5_rproc_pdata *local = rproc->priv;
+ struct rproc_mem_entry *mem, *nmem;
+ const struct zynqmp_eemi_ops *eemi = zynqmp_pm_get_eemi_ops();
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ if (!eemi || !eemi->force_powerdown) {
+ pr_err("Failed to stop R5\n");
+ return -ENXIO;
+ }
+
+ disable_ipi(local);
+ eemi->force_powerdown(local->rpu_pnode_id,
+ ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+
+ return 0;
+}
+
+static void *zynqmp_r5_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+ struct rproc_mem_entry *mem;
+ void *va = NULL;
+ struct zynqmp_r5_rproc_pdata *local = rproc->priv;
+
+ list_for_each_entry(mem, &local->mems, node) {
+ int offset = da - mem->da;
+
+ /* try next carveout if da is too small */
+ if (offset < 0)
+ continue;
+
+ /* try next carveout if da is too large */
+ if (offset + len > mem->len)
+ continue;
+
+ va = mem->va + offset;
+
+ break;
+ }
+ return va;
+}
+
+static int zynqmp_r5_parse_fw(struct rproc *rproc, const struct firmware *fw)
+{
+ int ret;
+
+ ret = rproc_elf_load_rsc_table(rproc, fw);
+ if (ret == -EINVAL)
+ /* No resource table */
+ return 0;
+ else
+ return ret;
+}
+
+static struct rproc_ops zynqmp_r5_rproc_ops = {
+ .start = zynqmp_r5_rproc_start,
+ .stop = zynqmp_r5_rproc_stop,
+ .kick = zynqmp_r5_rproc_kick,
+ .da_to_va = zynqmp_r5_rproc_da_to_va,
+};
+
+/* Release R5 from reset and make it halted.
+ * In case the firmware uses TCM, in order to load firmware to TCM,
+ * will need to release R5 from reset and stay in halted state.
+ */
+static int zynqmp_r5_rproc_init(struct rproc *rproc)
+{
+ struct device *dev = rproc->dev.parent;
+ struct zynqmp_r5_rproc_pdata *local = rproc->priv;
+
+ dev_dbg(dev, "%s\n", __func__);
+ enable_ipi(local);
+ return 0;
+}
+
+static irqreturn_t r5_remoteproc_interrupt(int irq, void *dev_id)
+{
+ struct device *dev = dev_id;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct rproc *rproc = platform_get_drvdata(pdev);
+ struct zynqmp_r5_rproc_pdata *local = rproc->priv;
+ u32 ipi_reg;
+
+ /* Check if there is a kick from R5 */
+ ipi_reg = reg_read(local->ipi_base, ISR_OFFSET);
+ if (!(ipi_reg & local->ipi_dest_mask))
+ return IRQ_NONE;
+
+ dev_dbg(dev, "KICK Linux because of pending message(irq%d)\n", irq);
+ reg_write(local->ipi_base, ISR_OFFSET, local->ipi_dest_mask);
+ schedule_work(&local->workqueue);
+
+ return IRQ_HANDLED;
+}
+
+/* zynqmp_r5_get_tcm_memories() - get tcm memories
+ * @pdev: pointer to the platform device
+ * @pdata: pointer to the remoteproc private data
+ *
+ * Function to create remoteproc memory entries for TCM memories.
+ */
+static int zynqmp_r5_get_tcms(struct platform_device *pdev,
+ struct zynqmp_r5_rproc_pdata *pdata)
+{
+ static const char * const mem_names[] = {"tcm_a", "tcm_b"};
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ int num_mems = 0;
+ int i, ret;
+ struct property *prop;
+ const __be32 *cur;
+ u32 val;
+ const struct zynqmp_eemi_ops *eemi = zynqmp_pm_get_eemi_ops();
+
+ /* Get TCM power node ids */
+ i = 0;
+ of_property_for_each_u32(np, "tcm-pnode-id", prop, cur, val)
+ pdata->tcm_pnode_id[i++] = val;
+
+ /* Request TCMs */
+ for (i = 0; i < MAX_TCM_PNODES; i++) {
+ if (pdata->tcm_pnode_id[i] != 0) {
+ ret = eemi->request_node(pdata->tcm_pnode_id[i],
+ ZYNQMP_PM_CAPABILITY_ACCESS, 0,
+ ZYNQMP_PM_REQUEST_ACK_BLOCKING
+ );
+ if (ret < 0) {
+ dev_err(dev, "failed to request TCM: %u\n",
+ pdata->tcm_pnode_id[i]);
+ return ret;
+ }
+ dev_dbg(dev, "request tcm pnode: %u\n",
+ pdata->tcm_pnode_id[i]);
+ } else {
+ break;
+ }
+ }
+ /* Create remoteproc memories entries for TCM memories */
+ num_mems = ARRAY_SIZE(mem_names);
+ for (i = 0; i < num_mems; i++) {
+ struct resource *res;
+ struct rproc_mem_entry *mem;
+ dma_addr_t dma;
+ resource_size_t size;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ mem_names[i]);
+ mem = devm_kzalloc(dev, sizeof(struct rproc_mem_entry),
+ GFP_KERNEL);
+ if (!mem)
+ return -ENOMEM;
+ /* Map it as normal memory */
+ size = resource_size(res);
+ mem->va = devm_ioremap_wc(dev, res->start, size);
+ mem->len = size;
+ dma = (dma_addr_t)res->start;
+ mem->dma = dma;
+ /* TCM memory:
+ * TCM_0: da 0 <-> global addr 0xFFE00000
+ * TCM_1: da 0 <-> global addr 0xFFE90000
+ */
+ if ((dma & 0xFFF00000) == 0xFFE00000) {
+ if ((dma & 0xFFF80000) == 0xFFE80000)
+ mem->da -= 0x90000;
+ else
+ mem->da = (dma & 0x000FFFFF);
+ }
+ dev_dbg(dev, "%s: va = %p, da = 0x%x dma = 0x%llx\n",
+ __func__, mem->va, mem->da, mem->dma);
+ list_add_tail(&mem->node, &pdata->mems);
+ }
+ return 0;
+}
+
+/* zynqmp_r5_get_reserved_mems() - get reserved memories
+ * @pdev: pointer to the platform device
+ * @pdata: pointer to the remoteproc private data
+ *
+ * Function to create remoteproc memory entries from memory-region
+ * property.
+ */
+static int zynqmp_r5_get_reserved_mems(struct platform_device *pdev,
+ struct zynqmp_r5_rproc_pdata *pdata)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ int num_mems;
+ int i;
+
+ num_mems = of_count_phandle_with_args(np, "memory-region", NULL);
+ if (num_mems <= 0)
+ return 0;
+ for (i = 0; i < num_mems; i++) {
+ struct device_node *node;
+ struct resource res;
+ resource_size_t size;
+ struct rproc_mem_entry *mem;
+ int ret;
+
+ node = of_parse_phandle(np, "memory-region", i);
+ ret = of_device_is_compatible(node, "rproc-prog-memory");
+ if (!ret) {
+ /* it is DMA memory. */
+ dev_info(dev, "%s, dma memory %d\n", __func__, i);
+ ret = of_reserved_mem_device_init_by_idx(dev,
+ np, i);
+ if (ret) {
+ dev_err(dev, "unable to reserve DMA mem.\n");
+ return ret;
+ }
+ continue;
+ }
+ ret = of_address_to_resource(node, 0, &res);
+ if (ret) {
+ dev_err(dev, "unable to resolve memory region.\n");
+ return ret;
+ }
+ mem = devm_kzalloc(dev, sizeof(struct rproc_mem_entry),
+ GFP_KERNEL);
+ if (!mem)
+ return -ENOMEM;
+ /* Map it as normal memory */
+ size = resource_size(&res);
+ mem->va = devm_ioremap_wc(dev, res.start, size);
+ mem->len = size;
+ mem->dma = (dma_addr_t)res.start;
+ mem->da = (u32)res.start;
+ dev_dbg(dev, "%s: va = %p, da = 0x%x dma = 0x%llx\n",
+ __func__, mem->va, mem->da, mem->dma);
+ list_add_tail(&mem->node, &pdata->mems);
+ }
+ return 0;
+}
+
+static int zynqmp_r5_remoteproc_probe(struct platform_device *pdev)
+{
+ const unsigned char *prop;
+ struct resource *res;
+ int ret = 0;
+ struct zynqmp_r5_rproc_pdata *local;
+ struct rproc *rproc;
+
+ rproc = rproc_alloc(&pdev->dev, dev_name(&pdev->dev),
+ &zynqmp_r5_rproc_ops, NULL,
+ sizeof(struct zynqmp_r5_rproc_pdata));
+ if (!rproc) {
+ dev_err(&pdev->dev, "rproc allocation failed\n");
+ return -ENOMEM;
+ }
+ local = rproc->priv;
+ local->rproc = rproc;
+
+ platform_set_drvdata(pdev, rproc);
+
+ /* Override parse_fw op to allow no resource table firmware */
+ rproc->ops->parse_fw = zynqmp_r5_parse_fw;
+
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(&pdev->dev, "dma_set_coherent_mask: %d\n", ret);
+ goto rproc_fault;
+ }
+
+ /* Get the RPU power domain id */
+ ret = of_property_read_u32(pdev->dev.of_node, "rpu-pnode-id",
+ &local->rpu_pnode_id);
+ if (ret) {
+ dev_err(&pdev->dev, "No RPU power node ID is specified.\n");
+ ret = -EINVAL;
+ goto rproc_fault;
+ }
+ dev_dbg(&pdev->dev, "RPU[%d] pnode_id = %d.\n",
+ local->rpu_id, local->rpu_pnode_id);
+
+ prop = of_get_property(pdev->dev.of_node, "core_conf", NULL);
+ if (!prop) {
+ dev_warn(&pdev->dev, "default core_conf used: lock-step\n");
+ prop = "lock-step";
+ }
+
+ dev_info(&pdev->dev, "RPU core_conf: %s\n", prop);
+ if (!strcmp(prop, "split0")) {
+ local->rpu_mode = PM_RPU_MODE_SPLIT;
+ local->rpu_id = 0;
+ local->ipi_dest_mask = RPU_0_IPI_MASK;
+ } else if (!strcmp(prop, "split1")) {
+ local->rpu_mode = PM_RPU_MODE_SPLIT;
+ local->rpu_id = 1;
+ local->ipi_dest_mask = RPU_1_IPI_MASK;
+ } else if (!strcmp(prop, "lock-step")) {
+ local->rpu_mode = PM_RPU_MODE_LOCKSTEP;
+ local->rpu_id = 0;
+ local->ipi_dest_mask = RPU_0_IPI_MASK;
+ } else {
+ dev_err(&pdev->dev, "Invalid core_conf mode provided - %s , %d\n",
+ prop, local->rpu_mode);
+ ret = -EINVAL;
+ goto rproc_fault;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ipi");
+ if (res) {
+ local->ipi_base = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (IS_ERR(local->ipi_base)) {
+ pr_err("%s: Unable to map IPI\n", __func__);
+ ret = PTR_ERR(local->ipi_base);
+ goto rproc_fault;
+ }
+ } else {
+ dev_info(&pdev->dev, "IPI resource is not specified.\n");
+ }
+ dev_dbg(&pdev->dev, "got ipi base address\n");
+
+ INIT_LIST_HEAD(&local->mems);
+ /* Get TCM memories */
+ ret = zynqmp_r5_get_tcms(pdev, local);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to get TCM memories.\n");
+ goto rproc_fault;
+ }
+ dev_dbg(&pdev->dev, "got TCM memories\n");
+ /* Get reserved memory regions for firmware */
+ ret = zynqmp_r5_get_reserved_mems(pdev, local);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to get reserved memories.\n");
+ goto rproc_fault;
+ }
+ dev_dbg(&pdev->dev, "got reserved memories.\n");
+
+ /* Disable IPI before requesting IPI IRQ */
+ disable_ipi(local);
+ INIT_WORK(&local->workqueue, handle_event_notified);
+
+ /* IPI IRQ */
+ if (local->ipi_base) {
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "unable to find IPI IRQ\n");
+ goto rproc_fault;
+ }
+ local->irq = ret;
+ ret = devm_request_irq(&pdev->dev, local->irq,
+ r5_remoteproc_interrupt, IRQF_SHARED,
+ dev_name(&pdev->dev), &pdev->dev);
+ if (ret) {
+ dev_err(&pdev->dev, "IRQ %d already allocated\n",
+ local->irq);
+ goto rproc_fault;
+ }
+ dev_dbg(&pdev->dev, "notification irq: %d\n", local->irq);
+ }
+
+ ret = zynqmp_r5_rproc_init(local->rproc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to init ZynqMP R5 rproc\n");
+ goto rproc_fault;
+ }
+
+ rproc->auto_boot = autoboot;
+
+ ret = rproc_add(local->rproc);
+ if (ret) {
+ dev_err(&pdev->dev, "rproc registration failed\n");
+ goto rproc_fault;
+ }
+
+ return ret;
+
+rproc_fault:
+ rproc_free(local->rproc);
+
+ return ret;
+}
+
+static int zynqmp_r5_remoteproc_remove(struct platform_device *pdev)
+{
+ struct rproc *rproc = platform_get_drvdata(pdev);
+ struct zynqmp_r5_rproc_pdata *local = rproc->priv;
+ struct rproc_mem_entry *mem;
+
+ dev_info(&pdev->dev, "%s\n", __func__);
+
+ rproc_del(rproc);
+
+ list_for_each_entry(mem, &local->mems, node) {
+ if (mem->priv)
+ gen_pool_free((struct gen_pool *)mem->priv,
+ (unsigned long)mem->va, mem->len);
+ }
+
+ r5_release_tcm(local);
+ of_reserved_mem_device_release(&pdev->dev);
+ rproc_free(rproc);
+
+ return 0;
+}
+
+/* Match table for OF platform binding */
+static const struct of_device_id zynqmp_r5_remoteproc_match[] = {
+ { .compatible = "xlnx,zynqmp-r5-remoteproc-1.0", },
+ { /* end of list */ },
+};
+MODULE_DEVICE_TABLE(of, zynqmp_r5_remoteproc_match);
+
+static struct platform_driver zynqmp_r5_remoteproc_driver = {
+ .probe = zynqmp_r5_remoteproc_probe,
+ .remove = zynqmp_r5_remoteproc_remove,
+ .driver = {
+ .name = "zynqmp_r5_remoteproc",
+ .of_match_table = zynqmp_r5_remoteproc_match,
+ },
+};
+module_platform_driver(zynqmp_r5_remoteproc_driver);
+
+module_param_named(autoboot, autoboot, bool, 0444);
+MODULE_PARM_DESC(autoboot,
+ "enable | disable autoboot. (default: true)");
+
+MODULE_AUTHOR("Jason Wu <j.wu@xilinx.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ZynqMP R5 remote processor control driver");
--
2.7.4