Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Tanmay Shah | 3444 | 100.00% | 1 | 100.00% |
Total | 3444 | 1 |
// 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");
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