summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/remoteproc/Kconfig13
-rw-r--r--drivers/remoteproc/Makefile1
-rw-r--r--drivers/remoteproc/xlnx_r5_remoteproc.c1067
3 files changed, 1081 insertions, 0 deletions
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 166019786653..a850e9f486dd 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -352,6 +352,19 @@ config TI_K3_R5_REMOTEPROC
It's safe to say N here if you're not interested in utilizing
a slave processor.
+config XLNX_R5_REMOTEPROC
+ tristate "Xilinx R5 remoteproc support"
+ depends on PM && ARCH_ZYNQMP
+ select ZYNQMP_FIRMWARE
+ select RPMSG_VIRTIO
+ select MAILBOX
+ select ZYNQMP_IPI_MBOX
+ help
+ Say y or m here to support Xilinx R5 remote processors via the remote
+ processor framework.
+
+ It's safe to say N if not interested in using RPU r5f cores.
+
endif # REMOTEPROC
endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 5478c7cb9e07..91314a9b43ce 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -38,3 +38,4 @@ 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_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o
+obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o
diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
new file mode 100644
index 000000000000..2db57d394155
--- /dev/null
+++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
@@ -0,0 +1,1067 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ZynqMP R5 Remote Processor driver
+ *
+ */
+
+#include <dt-bindings/power/xlnx-zynqmp-power.h>
+#include <linux/dma-mapping.h>
+#include <linux/firmware/xlnx-zynqmp.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/slab.h>
+
+#include "remoteproc_internal.h"
+
+/*
+ * settings for RPU cluster mode which
+ * reflects possible values of xlnx,cluster-mode dt-property
+ */
+enum zynqmp_r5_cluster_mode {
+ SPLIT_MODE = 0, /* When cores run as separate processor */
+ LOCKSTEP_MODE = 1, /* cores execute same code in lockstep,clk-for-clk */
+ SINGLE_CPU_MODE = 2, /* core0 is held in reset and only core1 runs */
+};
+
+/**
+ * struct mem_bank_data - Memory Bank description
+ *
+ * @addr: Start address of memory bank
+ * @size: Size of Memory bank
+ * @pm_domain_id: Power-domains id of memory bank for firmware to turn on/off
+ * @bank_name: name of the bank for remoteproc framework
+ */
+struct mem_bank_data {
+ phys_addr_t addr;
+ size_t size;
+ u32 pm_domain_id;
+ char *bank_name;
+};
+
+/*
+ * Hardcoded TCM bank values. This will be removed once TCM bindings are
+ * accepted for system-dt specifications and upstreamed in linux kernel
+ */
+static const struct mem_bank_data zynqmp_tcm_banks[] = {
+ {0xffe00000UL, 0x10000UL, PD_R5_0_ATCM, "atcm0"}, /* TCM 64KB each */
+ {0xffe20000UL, 0x10000UL, PD_R5_0_BTCM, "btcm0"},
+ {0xffe90000UL, 0x10000UL, PD_R5_1_ATCM, "atcm1"},
+ {0xffeb0000UL, 0x10000UL, PD_R5_1_BTCM, "btcm1"},
+};
+
+/**
+ * struct zynqmp_r5_core
+ *
+ * @dev: device of RPU instance
+ * @np: device node of RPU instance
+ * @tcm_bank_count: number TCM banks accessible to this RPU
+ * @tcm_banks: array of each TCM bank data
+ * @rmem_count: Number of reserved mem regions
+ * @rmem: reserved memory region nodes from device tree
+ * @rproc: rproc handle
+ * @pm_domain_id: RPU CPU power domain id
+ */
+struct zynqmp_r5_core {
+ struct device *dev;
+ struct device_node *np;
+ int tcm_bank_count;
+ struct mem_bank_data **tcm_banks;
+ int rmem_count;
+ struct reserved_mem **rmem;
+ struct rproc *rproc;
+ u32 pm_domain_id;
+};
+
+/**
+ * struct zynqmp_r5_cluster
+ *
+ * @dev: r5f subsystem cluster device node
+ * @mode: cluster mode of type zynqmp_r5_cluster_mode
+ * @core_count: number of r5 cores used for this cluster mode
+ * @r5_cores: Array of pointers pointing to r5 core
+ */
+struct zynqmp_r5_cluster {
+ struct device *dev;
+ enum zynqmp_r5_cluster_mode mode;
+ int core_count;
+ struct zynqmp_r5_core **r5_cores;
+};
+
+/*
+ * zynqmp_r5_set_mode()
+ *
+ * set RPU cluster and TCM operation mode
+ *
+ * @r5_core: pointer to zynqmp_r5_core type object
+ * @fw_reg_val: value expected by firmware to configure RPU cluster mode
+ * @tcm_mode: value expected by fw to configure TCM mode (lockstep or split)
+ *
+ * Return: 0 for success and < 0 for failure
+ */
+static int zynqmp_r5_set_mode(struct zynqmp_r5_core *r5_core,
+ enum rpu_oper_mode fw_reg_val,
+ enum rpu_tcm_comb tcm_mode)
+{
+ int ret;
+
+ ret = zynqmp_pm_set_rpu_mode(r5_core->pm_domain_id, fw_reg_val);
+ if (ret < 0) {
+ dev_err(r5_core->dev, "failed to set RPU mode\n");
+ return ret;
+ }
+
+ ret = zynqmp_pm_set_tcm_config(r5_core->pm_domain_id, tcm_mode);
+ if (ret < 0)
+ dev_err(r5_core->dev, "failed to configure TCM\n");
+
+ return ret;
+}
+
+/*
+ * zynqmp_r5_rproc_start()
+ * @rproc: single R5 core's corresponding rproc instance
+ *
+ * Start R5 Core from designated boot address.
+ *
+ * return 0 on success, otherwise non-zero value on failure
+ */
+static int zynqmp_r5_rproc_start(struct rproc *rproc)
+{
+ struct zynqmp_r5_core *r5_core = rproc->priv;
+ enum rpu_boot_mem bootmem;
+ int ret;
+
+ /*
+ * The exception vector pointers (EVP) refer to the base-address of
+ * exception vectors (for reset, IRQ, FIQ, etc). The reset-vector
+ * starts at the base-address and subsequent vectors are on 4-byte
+ * boundaries.
+ *
+ * Exception vectors can start either from 0x0000_0000 (LOVEC) or
+ * from 0xFFFF_0000 (HIVEC) which is mapped in the OCM (On-Chip Memory)
+ *
+ * Usually firmware will put Exception vectors at LOVEC.
+ *
+ * It is not recommend that you change the exception vector.
+ * Changing the EVP to HIVEC will result in increased interrupt latency
+ * and jitter. Also, if the OCM is secured and the Cortex-R5F processor
+ * is non-secured, then the Cortex-R5F processor cannot access the
+ * HIVEC exception vectors in the OCM.
+ */
+ bootmem = (rproc->bootaddr >= 0xFFFC0000) ?
+ PM_RPU_BOOTMEM_HIVEC : PM_RPU_BOOTMEM_LOVEC;
+
+ dev_dbg(r5_core->dev, "RPU boot addr 0x%llx from %s.", rproc->bootaddr,
+ bootmem == PM_RPU_BOOTMEM_HIVEC ? "OCM" : "TCM");
+
+ ret = zynqmp_pm_request_wake(r5_core->pm_domain_id, 1,
+ bootmem, ZYNQMP_PM_REQUEST_ACK_NO);
+ if (ret)
+ dev_err(r5_core->dev,
+ "failed to start RPU = 0x%x\n", r5_core->pm_domain_id);
+ return ret;
+}
+
+/*
+ * zynqmp_r5_rproc_stop()
+ * @rproc: single R5 core's corresponding rproc instance
+ *
+ * Power down R5 Core.
+ *
+ * return 0 on success, otherwise non-zero value on failure
+ */
+static int zynqmp_r5_rproc_stop(struct rproc *rproc)
+{
+ struct zynqmp_r5_core *r5_core = rproc->priv;
+ int ret;
+
+ ret = zynqmp_pm_force_pwrdwn(r5_core->pm_domain_id,
+ ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+ if (ret)
+ dev_err(r5_core->dev, "failed to stop remoteproc RPU %d\n", ret);
+
+ return ret;
+}
+
+/*
+ * zynqmp_r5_mem_region_map()
+ * @rproc: single R5 core's corresponding rproc instance
+ * @mem: mem descriptor to map reserved memory-regions
+ *
+ * Callback to map va for memory-region's carveout.
+ *
+ * return 0 on success, otherwise non-zero value on failure
+ */
+static int zynqmp_r5_mem_region_map(struct rproc *rproc,
+ struct rproc_mem_entry *mem)
+{
+ void __iomem *va;
+
+ va = ioremap_wc(mem->dma, mem->len);
+ if (IS_ERR_OR_NULL(va))
+ return -ENOMEM;
+
+ mem->va = (void *)va;
+
+ return 0;
+}
+
+/*
+ * zynqmp_r5_rproc_mem_unmap
+ * @rproc: single R5 core's corresponding rproc instance
+ * @mem: mem entry to unmap
+ *
+ * Unmap memory-region carveout
+ *
+ * return: always returns 0
+ */
+static int zynqmp_r5_mem_region_unmap(struct rproc *rproc,
+ struct rproc_mem_entry *mem)
+{
+ iounmap((void __iomem *)mem->va);
+ return 0;
+}
+
+/*
+ * add_mem_regions_carveout()
+ * @rproc: single R5 core's corresponding rproc instance
+ *
+ * Construct rproc mem carveouts from memory-region property nodes
+ *
+ * return 0 on success, otherwise non-zero value on failure
+ */
+static int add_mem_regions_carveout(struct rproc *rproc)
+{
+ struct rproc_mem_entry *rproc_mem;
+ struct zynqmp_r5_core *r5_core;
+ struct reserved_mem *rmem;
+ int i, num_mem_regions;
+
+ r5_core = (struct zynqmp_r5_core *)rproc->priv;
+ num_mem_regions = r5_core->rmem_count;
+
+ for (i = 0; i < num_mem_regions; i++) {
+ rmem = r5_core->rmem[i];
+
+ if (!strncmp(rmem->name, "vdev0buffer", strlen("vdev0buffer"))) {
+ /* Init reserved memory for vdev buffer */
+ rproc_mem = rproc_of_resm_mem_entry_init(&rproc->dev, i,
+ rmem->size,
+ rmem->base,
+ rmem->name);
+ } else {
+ /* Register associated reserved memory regions */
+ rproc_mem = rproc_mem_entry_init(&rproc->dev, NULL,
+ (dma_addr_t)rmem->base,
+ rmem->size, rmem->base,
+ zynqmp_r5_mem_region_map,
+ zynqmp_r5_mem_region_unmap,
+ rmem->name);
+ }
+
+ if (!rproc_mem)
+ return -ENOMEM;
+
+ rproc_add_carveout(rproc, rproc_mem);
+
+ dev_dbg(&rproc->dev, "reserved mem carveout %s addr=%llx, size=0x%llx",
+ rmem->name, rmem->base, rmem->size);
+ }
+
+ return 0;
+}
+
+/*
+ * tcm_mem_unmap()
+ * @rproc: single R5 core's corresponding rproc instance
+ * @mem: tcm mem entry to unmap
+ *
+ * Unmap TCM banks when powering down R5 core.
+ *
+ * return always 0
+ */
+static int tcm_mem_unmap(struct rproc *rproc, struct rproc_mem_entry *mem)
+{
+ iounmap((void __iomem *)mem->va);
+
+ return 0;
+}
+
+/*
+ * tcm_mem_map()
+ * @rproc: single R5 core's corresponding rproc instance
+ * @mem: tcm memory entry descriptor
+ *
+ * Given TCM bank entry, this func setup virtual address for TCM bank
+ * remoteproc carveout. It also takes care of va to da address translation
+ *
+ * return 0 on success, otherwise non-zero value on failure
+ */
+static int tcm_mem_map(struct rproc *rproc,
+ struct rproc_mem_entry *mem)
+{
+ void __iomem *va;
+
+ va = ioremap_wc(mem->dma, mem->len);
+ if (IS_ERR_OR_NULL(va))
+ return -ENOMEM;
+
+ /* Update memory entry va */
+ mem->va = (void *)va;
+
+ /* clear TCMs */
+ memset_io(va, 0, mem->len);
+
+ /*
+ * The R5s expect their TCM banks to be at address 0x0 and 0x2000,
+ * while on the Linux side they are at 0xffexxxxx.
+ *
+ * Zero out the high 12 bits of the address. This will give
+ * expected values for TCM Banks 0A and 0B (0x0 and 0x20000).
+ */
+ mem->da &= 0x000fffff;
+
+ /*
+ * TCM Banks 1A and 1B still have to be translated.
+ *
+ * Below handle these two banks' absolute addresses (0xffe90000 and
+ * 0xffeb0000) and convert to the expected relative addresses
+ * (0x0 and 0x20000).
+ */
+ if (mem->da == 0x90000 || mem->da == 0xB0000)
+ mem->da -= 0x90000;
+
+ /* if translated TCM bank address is not valid report error */
+ if (mem->da != 0x0 && mem->da != 0x20000) {
+ dev_err(&rproc->dev, "invalid TCM address: %x\n", mem->da);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * add_tcm_carveout_split_mode()
+ * @rproc: single R5 core's corresponding rproc instance
+ *
+ * allocate and add remoteproc carveout for TCM memory in split mode
+ *
+ * return 0 on success, otherwise non-zero value on failure
+ */
+static int add_tcm_carveout_split_mode(struct rproc *rproc)
+{
+ struct rproc_mem_entry *rproc_mem;
+ struct zynqmp_r5_core *r5_core;
+ int i, num_banks, ret;
+ phys_addr_t bank_addr;
+ struct device *dev;
+ u32 pm_domain_id;
+ size_t bank_size;
+ char *bank_name;
+
+ r5_core = (struct zynqmp_r5_core *)rproc->priv;
+ dev = r5_core->dev;
+ num_banks = r5_core->tcm_bank_count;
+
+ /*
+ * Power-on Each 64KB TCM,
+ * register its address space, map and unmap functions
+ * and add carveouts accordingly
+ */
+ for (i = 0; i < num_banks; i++) {
+ bank_addr = r5_core->tcm_banks[i]->addr;
+ bank_name = r5_core->tcm_banks[i]->bank_name;
+ bank_size = r5_core->tcm_banks[i]->size;
+ pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
+
+ ret = zynqmp_pm_request_node(pm_domain_id,
+ ZYNQMP_PM_CAPABILITY_ACCESS, 0,
+ ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+ if (ret < 0) {
+ dev_err(dev, "failed to turn on TCM 0x%x", pm_domain_id);
+ goto release_tcm_split;
+ }
+
+ dev_dbg(dev, "TCM carveout split mode %s addr=%llx, size=0x%lx",
+ bank_name, bank_addr, bank_size);
+
+ rproc_mem = rproc_mem_entry_init(dev, NULL, bank_addr,
+ bank_size, bank_addr,
+ tcm_mem_map, tcm_mem_unmap,
+ bank_name);
+ if (!rproc_mem) {
+ ret = -ENOMEM;
+ zynqmp_pm_release_node(pm_domain_id);
+ goto release_tcm_split;
+ }
+
+ rproc_add_carveout(rproc, rproc_mem);
+ }
+
+ return 0;
+
+release_tcm_split:
+ /* If failed, Turn off all TCM banks turned on before */
+ for (i--; i >= 0; i--) {
+ pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
+ zynqmp_pm_release_node(pm_domain_id);
+ }
+ return ret;
+}
+
+/*
+ * add_tcm_carveout_lockstep_mode()
+ * @rproc: single R5 core's corresponding rproc instance
+ *
+ * allocate and add remoteproc carveout for TCM memory in lockstep mode
+ *
+ * return 0 on success, otherwise non-zero value on failure
+ */
+static int add_tcm_carveout_lockstep_mode(struct rproc *rproc)
+{
+ struct rproc_mem_entry *rproc_mem;
+ struct zynqmp_r5_core *r5_core;
+ int i, num_banks, ret;
+ phys_addr_t bank_addr;
+ size_t bank_size = 0;
+ struct device *dev;
+ u32 pm_domain_id;
+ char *bank_name;
+
+ r5_core = (struct zynqmp_r5_core *)rproc->priv;
+ dev = r5_core->dev;
+
+ /* Go through zynqmp banks for r5 node */
+ num_banks = r5_core->tcm_bank_count;
+
+ /*
+ * In lockstep mode, TCM is contiguous memory block
+ * However, each TCM block still needs to be enabled individually.
+ * So, Enable each TCM block individually, but add their size
+ * to create contiguous memory region.
+ */
+ bank_addr = r5_core->tcm_banks[0]->addr;
+ bank_name = r5_core->tcm_banks[0]->bank_name;
+
+ for (i = 0; i < num_banks; i++) {
+ bank_size += r5_core->tcm_banks[i]->size;
+ pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
+
+ /* Turn on each TCM bank individually */
+ ret = zynqmp_pm_request_node(pm_domain_id,
+ ZYNQMP_PM_CAPABILITY_ACCESS, 0,
+ ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+ if (ret < 0) {
+ dev_err(dev, "failed to turn on TCM 0x%x", pm_domain_id);
+ goto release_tcm_lockstep;
+ }
+ }
+
+ dev_dbg(dev, "TCM add carveout lockstep mode %s addr=0x%llx, size=0x%lx",
+ bank_name, bank_addr, bank_size);
+
+ /* Register TCM address range, TCM map and unmap functions */
+ rproc_mem = rproc_mem_entry_init(dev, NULL, bank_addr,
+ bank_size, bank_addr,
+ tcm_mem_map, tcm_mem_unmap,
+ bank_name);
+ if (!rproc_mem) {
+ ret = -ENOMEM;
+ goto release_tcm_lockstep;
+ }
+
+ /* If registration is success, add carveouts */
+ rproc_add_carveout(rproc, rproc_mem);
+
+ return 0;
+
+release_tcm_lockstep:
+ /* If failed, Turn off all TCM banks turned on before */
+ for (i--; i >= 0; i--) {
+ pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
+ zynqmp_pm_release_node(pm_domain_id);
+ }
+ return ret;
+}
+
+/*
+ * add_tcm_banks()
+ * @rproc: single R5 core's corresponding rproc instance
+ *
+ * allocate and add remoteproc carveouts for TCM memory based on cluster mode
+ *
+ * return 0 on success, otherwise non-zero value on failure
+ */
+static int add_tcm_banks(struct rproc *rproc)
+{
+ struct zynqmp_r5_cluster *cluster;
+ struct zynqmp_r5_core *r5_core;
+ struct device *dev;
+
+ r5_core = (struct zynqmp_r5_core *)rproc->priv;
+ if (!r5_core)
+ return -EINVAL;
+
+ dev = r5_core->dev;
+
+ cluster = dev_get_drvdata(dev->parent);
+ if (!cluster) {
+ dev_err(dev->parent, "Invalid driver data\n");
+ return -EINVAL;
+ }
+
+ /*
+ * In lockstep mode TCM banks are one contiguous memory region of 256Kb
+ * In split mode, each TCM bank is 64Kb and not contiguous.
+ * We add memory carveouts accordingly.
+ */
+ if (cluster->mode == SPLIT_MODE)
+ return add_tcm_carveout_split_mode(rproc);
+ else if (cluster->mode == LOCKSTEP_MODE)
+ return add_tcm_carveout_lockstep_mode(rproc);
+
+ return -EINVAL;
+}
+
+/*
+ * zynqmp_r5_parse_fw()
+ * @rproc: single R5 core's corresponding rproc instance
+ * @fw: ptr to firmware to be loaded onto r5 core
+ *
+ * get resource table if available
+ *
+ * return 0 on success, otherwise non-zero value on failure
+ */
+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) {
+ /*
+ * resource table only required for IPC.
+ * if not present, this is not necessarily an error;
+ * for example, loading r5 hello world application
+ * so simply inform user and keep going.
+ */
+ dev_info(&rproc->dev, "no resource table found.\n");
+ ret = 0;
+ }
+ return ret;
+}
+
+/**
+ * zynqmp_r5_rproc_prepare()
+ * adds carveouts for TCM bank and reserved memory regions
+ *
+ * @rproc: Device node of each rproc
+ *
+ * Return: 0 for success else < 0 error code
+ */
+static int zynqmp_r5_rproc_prepare(struct rproc *rproc)
+{
+ int ret;
+
+ ret = add_tcm_banks(rproc);
+ if (ret) {
+ dev_err(&rproc->dev, "failed to get TCM banks, err %d\n", ret);
+ return ret;
+ }
+
+ ret = add_mem_regions_carveout(rproc);
+ if (ret) {
+ dev_err(&rproc->dev, "failed to get reserve mem regions %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_r5_rproc_unprepare()
+ * Turns off TCM banks using power-domain id
+ *
+ * @rproc: Device node of each rproc
+ *
+ * Return: always 0
+ */
+static int zynqmp_r5_rproc_unprepare(struct rproc *rproc)
+{
+ struct zynqmp_r5_core *r5_core;
+ u32 pm_domain_id;
+ int i;
+
+ r5_core = (struct zynqmp_r5_core *)rproc->priv;
+
+ for (i = 0; i < r5_core->tcm_bank_count; i++) {
+ pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
+ if (zynqmp_pm_release_node(pm_domain_id))
+ dev_warn(r5_core->dev,
+ "can't turn off TCM bank 0x%x", pm_domain_id);
+ }
+
+ return 0;
+}
+
+static const struct rproc_ops zynqmp_r5_rproc_ops = {
+ .prepare = zynqmp_r5_rproc_prepare,
+ .unprepare = zynqmp_r5_rproc_unprepare,
+ .start = zynqmp_r5_rproc_start,
+ .stop = zynqmp_r5_rproc_stop,
+ .load = rproc_elf_load_segments,
+ .parse_fw = zynqmp_r5_parse_fw,
+ .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
+ .sanity_check = rproc_elf_sanity_check,
+ .get_boot_addr = rproc_elf_get_boot_addr,
+};
+
+/**
+ * zynqmp_r5_add_rproc_core()
+ * Allocate and add struct rproc object for each r5f core
+ * This is called for each individual r5f core
+ *
+ * @cdev: Device node of each r5 core
+ *
+ * Return: zynqmp_r5_core object for success else error code pointer
+ */
+static struct zynqmp_r5_core *zynqmp_r5_add_rproc_core(struct device *cdev)
+{
+ struct zynqmp_r5_core *r5_core;
+ struct rproc *r5_rproc;
+ int ret;
+
+ /* Set up DMA mask */
+ ret = dma_set_coherent_mask(cdev, DMA_BIT_MASK(32));
+ if (ret)
+ return ERR_PTR(ret);
+
+ /* Allocate remoteproc instance */
+ r5_rproc = rproc_alloc(cdev, dev_name(cdev),
+ &zynqmp_r5_rproc_ops,
+ NULL, sizeof(struct zynqmp_r5_core));
+ if (!r5_rproc) {
+ dev_err(cdev, "failed to allocate memory for rproc instance\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ r5_rproc->auto_boot = false;
+ r5_core = (struct zynqmp_r5_core *)r5_rproc->priv;
+ r5_core->dev = cdev;
+ r5_core->np = dev_of_node(cdev);
+ if (!r5_core->np) {
+ dev_err(cdev, "can't get device node for r5 core\n");
+ ret = -EINVAL;
+ goto free_rproc;
+ }
+
+ /* Add R5 remoteproc core */
+ ret = rproc_add(r5_rproc);
+ if (ret) {
+ dev_err(cdev, "failed to add r5 remoteproc\n");
+ goto free_rproc;
+ }
+
+ r5_core->rproc = r5_rproc;
+ return r5_core;
+
+free_rproc:
+ rproc_free(r5_rproc);
+ return ERR_PTR(ret);
+}
+
+/**
+ * zynqmp_r5_get_tcm_node()
+ * Ideally this function should parse tcm node and store information
+ * in r5_core instance. For now, Hardcoded TCM information is used.
+ * This approach is used as TCM bindings for system-dt is being developed
+ *
+ * @cluster: pointer to zynqmp_r5_cluster type object
+ *
+ * Return: 0 for success and < 0 error code for failure.
+ */
+static int zynqmp_r5_get_tcm_node(struct zynqmp_r5_cluster *cluster)
+{
+ struct device *dev = cluster->dev;
+ struct zynqmp_r5_core *r5_core;
+ int tcm_bank_count, tcm_node;
+ int i, j;
+
+ tcm_bank_count = ARRAY_SIZE(zynqmp_tcm_banks);
+
+ /* count per core tcm banks */
+ tcm_bank_count = tcm_bank_count / cluster->core_count;
+
+ /*
+ * r5 core 0 will use all of TCM banks in lockstep mode.
+ * In split mode, r5 core0 will use 128k and r5 core1 will use another
+ * 128k. Assign TCM banks to each core accordingly
+ */
+ tcm_node = 0;
+ for (i = 0; i < cluster->core_count; i++) {
+ r5_core = cluster->r5_cores[i];
+ r5_core->tcm_banks = devm_kcalloc(dev, tcm_bank_count,
+ sizeof(struct mem_bank_data *),
+ GFP_KERNEL);
+ if (!r5_core->tcm_banks)
+ return -ENOMEM;
+
+ for (j = 0; j < tcm_bank_count; j++) {
+ /*
+ * Use pre-defined TCM reg values.
+ * Eventually this should be replaced by values
+ * parsed from dts.
+ */
+ r5_core->tcm_banks[j] =
+ (struct mem_bank_data *)&zynqmp_tcm_banks[tcm_node];
+ tcm_node++;
+ }
+
+ r5_core->tcm_bank_count = tcm_bank_count;
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_r5_get_mem_region_node()
+ * parse memory-region property and get reserved mem regions
+ *
+ * @r5_core: pointer to zynqmp_r5_core type object
+ *
+ * Return: 0 for success and error code for failure.
+ */
+static int zynqmp_r5_get_mem_region_node(struct zynqmp_r5_core *r5_core)
+{
+ struct device_node *np, *rmem_np;
+ struct reserved_mem **rmem;
+ int res_mem_count, i;
+ struct device *dev;
+
+ dev = r5_core->dev;
+ np = r5_core->np;
+
+ res_mem_count = of_property_count_elems_of_size(np, "memory-region",
+ sizeof(phandle));
+ if (res_mem_count <= 0) {
+ dev_warn(dev, "failed to get memory-region property %d\n",
+ res_mem_count);
+ return 0;
+ }
+
+ rmem = devm_kcalloc(dev, res_mem_count,
+ sizeof(struct reserved_mem *), GFP_KERNEL);
+ if (!rmem)
+ return -ENOMEM;
+
+ for (i = 0; i < res_mem_count; i++) {
+ rmem_np = of_parse_phandle(np, "memory-region", i);
+ if (!rmem_np)
+ goto release_rmem;
+
+ rmem[i] = of_reserved_mem_lookup(rmem_np);
+ if (!rmem[i]) {
+ of_node_put(rmem_np);
+ goto release_rmem;
+ }
+
+ of_node_put(rmem_np);
+ }
+
+ r5_core->rmem_count = res_mem_count;
+ r5_core->rmem = rmem;
+ return 0;
+
+release_rmem:
+ return -EINVAL;
+}
+
+/*
+ * zynqmp_r5_core_init()
+ * Create and initialize zynqmp_r5_core type object
+ *
+ * @cluster: pointer to zynqmp_r5_cluster type object
+ * @fw_reg_val: value expected by firmware to configure RPU cluster mode
+ * @tcm_mode: value expected by fw to configure TCM mode (lockstep or split)
+ *
+ * Return: 0 for success and error code for failure.
+ */
+static int zynqmp_r5_core_init(struct zynqmp_r5_cluster *cluster,
+ enum rpu_oper_mode fw_reg_val,
+ enum rpu_tcm_comb tcm_mode)
+{
+ struct device *dev = cluster->dev;
+ struct zynqmp_r5_core *r5_core;
+ int ret, i;
+
+ ret = zynqmp_r5_get_tcm_node(cluster);
+ if (ret < 0) {
+ dev_err(dev, "can't get tcm node, err %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < cluster->core_count; i++) {
+ r5_core = cluster->r5_cores[i];
+
+ ret = zynqmp_r5_get_mem_region_node(r5_core);
+ if (ret)
+ dev_warn(dev, "memory-region prop failed %d\n", ret);
+
+ /* Initialize r5 cores with power-domains parsed from dts */
+ ret = of_property_read_u32_index(r5_core->np, "power-domains",
+ 1, &r5_core->pm_domain_id);
+ if (ret) {
+ dev_err(dev, "failed to get power-domains property\n");
+ return ret;
+ }
+
+ ret = zynqmp_r5_set_mode(r5_core, fw_reg_val, tcm_mode);
+ if (ret) {
+ dev_err(dev, "failed to set r5 cluster mode %d, err %d\n",
+ cluster->mode, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * zynqmp_r5_cluster_init()
+ * Create and initialize zynqmp_r5_cluster type object
+ *
+ * @cluster: pointer to zynqmp_r5_cluster type object
+ *
+ * Return: 0 for success and error code for failure.
+ */
+static int zynqmp_r5_cluster_init(struct zynqmp_r5_cluster *cluster)
+{
+ enum zynqmp_r5_cluster_mode cluster_mode = LOCKSTEP_MODE;
+ struct device *dev = cluster->dev;
+ struct device_node *dev_node = dev_of_node(dev);
+ struct platform_device *child_pdev;
+ struct zynqmp_r5_core **r5_cores;
+ enum rpu_oper_mode fw_reg_val;
+ struct device **child_devs;
+ struct device_node *child;
+ enum rpu_tcm_comb tcm_mode;
+ int core_count, ret, i;
+
+ ret = of_property_read_u32(dev_node, "xlnx,cluster-mode", &cluster_mode);
+
+ /*
+ * on success returns 0, if not defined then returns -EINVAL,
+ * In that case, default is LOCKSTEP mode. Other than that
+ * returns relative error code < 0.
+ */
+ if (ret != -EINVAL && ret != 0) {
+ dev_err(dev, "Invalid xlnx,cluster-mode property\n");
+ return ret;
+ }
+
+ /*
+ * For now driver only supports split mode and lockstep mode.
+ * fail driver probe if either of that is not set in dts.
+ */
+ if (cluster_mode == LOCKSTEP_MODE) {
+ tcm_mode = PM_RPU_TCM_COMB;
+ fw_reg_val = PM_RPU_MODE_LOCKSTEP;
+ } else if (cluster_mode == SPLIT_MODE) {
+ tcm_mode = PM_RPU_TCM_SPLIT;
+ fw_reg_val = PM_RPU_MODE_SPLIT;
+ } else {
+ dev_err(dev, "driver does not support cluster mode %d\n", cluster_mode);
+ return -EINVAL;
+ }
+
+ /*
+ * Number of cores is decided by number of child nodes of
+ * r5f subsystem node in dts. If Split mode is used in dts
+ * 2 child nodes are expected.
+ * In lockstep mode if two child nodes are available,
+ * only use first child node and consider it as core0
+ * and ignore core1 dt node.
+ */
+ core_count = of_get_available_child_count(dev_node);
+ if (core_count == 0) {
+ dev_err(dev, "Invalid number of r5 cores %d", core_count);
+ return -EINVAL;
+ } else if (cluster_mode == SPLIT_MODE && core_count != 2) {
+ dev_err(dev, "Invalid number of r5 cores for split mode\n");
+ return -EINVAL;
+ } else if (cluster_mode == LOCKSTEP_MODE && core_count == 2) {
+ dev_warn(dev, "Only r5 core0 will be used\n");
+ core_count = 1;
+ }
+
+ child_devs = kcalloc(core_count, sizeof(struct device *), GFP_KERNEL);
+ if (!child_devs)
+ return -ENOMEM;
+
+ r5_cores = kcalloc(core_count,
+ sizeof(struct zynqmp_r5_core *), GFP_KERNEL);
+ if (!r5_cores) {
+ kfree(child_devs);
+ return -ENOMEM;
+ }
+
+ i = 0;
+ for_each_available_child_of_node(dev_node, child) {
+ child_pdev = of_find_device_by_node(child);
+ if (!child_pdev) {
+ of_node_put(child);
+ ret = -ENODEV;
+ goto release_r5_cores;
+ }
+
+ child_devs[i] = &child_pdev->dev;
+
+ /* create and add remoteproc instance of type struct rproc */
+ r5_cores[i] = zynqmp_r5_add_rproc_core(&child_pdev->dev);
+ if (IS_ERR(r5_cores[i])) {
+ of_node_put(child);
+ ret = PTR_ERR(r5_cores[i]);
+ r5_cores[i] = NULL;
+ goto release_r5_cores;
+ }
+
+ /*
+ * If two child nodes are available in dts in lockstep mode,
+ * then ignore second child node.
+ */
+ if (cluster_mode == LOCKSTEP_MODE) {
+ of_node_put(child);
+ break;
+ }
+
+ i++;
+ }
+
+ cluster->mode = cluster_mode;
+ cluster->core_count = core_count;
+ cluster->r5_cores = r5_cores;
+
+ ret = zynqmp_r5_core_init(cluster, fw_reg_val, tcm_mode);
+ if (ret < 0) {
+ dev_err(dev, "failed to init r5 core err %d\n", ret);
+ cluster->core_count = 0;
+ cluster->r5_cores = NULL;
+
+ /*
+ * at this point rproc resources for each core are allocated.
+ * adjust index to free resources in reverse order
+ */
+ i = core_count - 1;
+ goto release_r5_cores;
+ }
+
+ kfree(child_devs);
+ return 0;
+
+release_r5_cores:
+ while (i >= 0) {
+ put_device(child_devs[i]);
+ if (r5_cores[i]) {
+ of_reserved_mem_device_release(r5_cores[i]->dev);
+ rproc_del(r5_cores[i]->rproc);
+ rproc_free(r5_cores[i]->rproc);
+ }
+ i--;
+ }
+ kfree(r5_cores);
+ kfree(child_devs);
+ return ret;
+}
+
+static void zynqmp_r5_cluster_exit(void *data)
+{
+ struct platform_device *pdev = (struct platform_device *)data;
+ struct zynqmp_r5_cluster *cluster;
+ struct zynqmp_r5_core *r5_core;
+ int i;
+
+ cluster = (struct zynqmp_r5_cluster *)platform_get_drvdata(pdev);
+ if (!cluster)
+ return;
+
+ for (i = 0; i < cluster->core_count; i++) {
+ r5_core = cluster->r5_cores[i];
+ of_reserved_mem_device_release(r5_core->dev);
+ put_device(r5_core->dev);
+ rproc_del(r5_core->rproc);
+ rproc_free(r5_core->rproc);
+ }
+
+ kfree(cluster->r5_cores);
+ kfree(cluster);
+ platform_set_drvdata(pdev, NULL);
+}
+
+/*
+ * zynqmp_r5_remoteproc_probe()
+ * parse device-tree, initialize hardware and allocate required resources
+ * and remoteproc ops
+ *
+ * @pdev: domain platform device for R5 cluster
+ *
+ * Return: 0 for success and < 0 for failure.
+ */
+static int zynqmp_r5_remoteproc_probe(struct platform_device *pdev)
+{
+ struct zynqmp_r5_cluster *cluster;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ cluster = kzalloc(sizeof(*cluster), GFP_KERNEL);
+ if (!cluster)
+ return -ENOMEM;
+
+ cluster->dev = dev;
+
+ ret = devm_of_platform_populate(dev);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to populate platform dev\n");
+ kfree(cluster);
+ return ret;
+ }
+
+ /* wire in so each core can be cleaned up at driver remove */
+ platform_set_drvdata(pdev, cluster);
+
+ ret = zynqmp_r5_cluster_init(cluster);
+ if (ret) {
+ kfree(cluster);
+ platform_set_drvdata(pdev, NULL);
+ dev_err_probe(dev, ret, "Invalid r5f subsystem device tree\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(dev, zynqmp_r5_cluster_exit, pdev);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+/* Match table for OF platform binding */
+static const struct of_device_id zynqmp_r5_remoteproc_match[] = {
+ { .compatible = "xlnx,zynqmp-r5fss", },
+ { /* end of list */ },
+};
+MODULE_DEVICE_TABLE(of, zynqmp_r5_remoteproc_match);
+
+static struct platform_driver zynqmp_r5_remoteproc_driver = {
+ .probe = zynqmp_r5_remoteproc_probe,
+ .driver = {
+ .name = "zynqmp_r5_remoteproc",
+ .of_match_table = zynqmp_r5_remoteproc_match,
+ },
+};
+module_platform_driver(zynqmp_r5_remoteproc_driver);
+
+MODULE_DESCRIPTION("Xilinx R5F remote processor driver");
+MODULE_AUTHOR("Xilinx Inc.");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-18 14:35:20 +0300