diff options
Diffstat (limited to 'kernel/drivers/remoteproc')
| -rw-r--r-- | kernel/drivers/remoteproc/Kconfig | 13 | ||||
| -rw-r--r-- | kernel/drivers/remoteproc/Makefile | 1 | ||||
| -rw-r--r-- | kernel/drivers/remoteproc/da8xx_remoteproc.c | 3 | ||||
| -rw-r--r-- | kernel/drivers/remoteproc/remoteproc_core.c | 117 | ||||
| -rw-r--r-- | kernel/drivers/remoteproc/remoteproc_debugfs.c | 2 | ||||
| -rw-r--r-- | kernel/drivers/remoteproc/remoteproc_internal.h | 2 | ||||
| -rw-r--r-- | kernel/drivers/remoteproc/ste_modem_rproc.c | 4 | ||||
| -rw-r--r-- | kernel/drivers/remoteproc/wkup_m3_rproc.c | 257 |
8 files changed, 369 insertions, 30 deletions
diff --git a/kernel/drivers/remoteproc/Kconfig b/kernel/drivers/remoteproc/Kconfig index 5e343bab9..28c711f0a 100644 --- a/kernel/drivers/remoteproc/Kconfig +++ b/kernel/drivers/remoteproc/Kconfig @@ -41,6 +41,19 @@ config STE_MODEM_RPROC This can be either built-in or a loadable module. If unsure say N. +config WKUP_M3_RPROC + tristate "AMx3xx Wakeup M3 remoteproc support" + depends on SOC_AM33XX || SOC_AM43XX + select REMOTEPROC + help + Say y here to support Wakeup M3 remote processor on TI AM33xx + and AM43xx family of SoCs. + + Required for Suspend-to-RAM on AM33xx and AM43xx SoCs. Also needed + for deep CPUIdle states on AM33xx SoCs. Allows for loading of the + firmware onto these remote processors. + If unsure say N. + config DA8XX_REMOTEPROC tristate "DA8xx/OMAP-L13x remoteproc support" depends on ARCH_DAVINCI_DA8XX diff --git a/kernel/drivers/remoteproc/Makefile b/kernel/drivers/remoteproc/Makefile index ac2ff7568..81b04d1e2 100644 --- a/kernel/drivers/remoteproc/Makefile +++ b/kernel/drivers/remoteproc/Makefile @@ -9,4 +9,5 @@ remoteproc-y += remoteproc_virtio.o remoteproc-y += remoteproc_elf_loader.o obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o obj-$(CONFIG_STE_MODEM_RPROC) += ste_modem_rproc.o +obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o diff --git a/kernel/drivers/remoteproc/da8xx_remoteproc.c b/kernel/drivers/remoteproc/da8xx_remoteproc.c index f8d6a0661..009e56f67 100644 --- a/kernel/drivers/remoteproc/da8xx_remoteproc.c +++ b/kernel/drivers/remoteproc/da8xx_remoteproc.c @@ -26,8 +26,7 @@ static char *da8xx_fw_name; module_param(da8xx_fw_name, charp, S_IRUGO); MODULE_PARM_DESC(da8xx_fw_name, - "\n\t\tName of DSP firmware file in /lib/firmware" - " (if not specified defaults to 'rproc-dsp-fw')"); + "Name of DSP firmware file in /lib/firmware (if not specified defaults to 'rproc-dsp-fw')"); /* * OMAP-L138 Technical References: diff --git a/kernel/drivers/remoteproc/remoteproc_core.c b/kernel/drivers/remoteproc/remoteproc_core.c index 11cdb119e..9e03d158f 100644 --- a/kernel/drivers/remoteproc/remoteproc_core.c +++ b/kernel/drivers/remoteproc/remoteproc_core.c @@ -44,6 +44,9 @@ #include "remoteproc_internal.h" +static DEFINE_MUTEX(rproc_list_mutex); +static LIST_HEAD(rproc_list); + typedef int (*rproc_handle_resources_t)(struct rproc *rproc, struct resource_table *table, int len); typedef int (*rproc_handle_resource_t)(struct rproc *rproc, @@ -132,32 +135,48 @@ static void rproc_disable_iommu(struct rproc *rproc) iommu_detach_device(domain, dev); iommu_domain_free(domain); - - return; } -/* +/** + * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc address + * @rproc: handle of a remote processor + * @da: remoteproc device address to translate + * @len: length of the memory region @da is pointing to + * * Some remote processors will ask us to allocate them physically contiguous * memory regions (which we call "carveouts"), and map them to specific - * device addresses (which are hardcoded in the firmware). + * device addresses (which are hardcoded in the firmware). They may also have + * dedicated memory regions internal to the processors, and use them either + * exclusively or alongside carveouts. * * They may then ask us to copy objects into specific device addresses (e.g. * code/data sections) or expose us certain symbols in other device address * (e.g. their trace buffer). * - * This function is an internal helper with which we can go over the allocated - * carveouts and translate specific device address to kernel virtual addresses - * so we can access the referenced memory. + * This function is a helper function with which we can go over the allocated + * carveouts and translate specific device addresses to kernel virtual addresses + * so we can access the referenced memory. This function also allows to perform + * translations on the internal remoteproc memory regions through a platform + * implementation specific da_to_va ops, if present. + * + * The function returns a valid kernel address on success or NULL on failure. * * Note: phys_to_virt(iommu_iova_to_phys(rproc->domain, da)) will work too, * but only on kernel direct mapped RAM memory. Instead, we're just using - * here the output of the DMA API, which should be more correct. + * here the output of the DMA API for the carveouts, which should be more + * correct. */ void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) { struct rproc_mem_entry *carveout; void *ptr = NULL; + if (rproc->ops->da_to_va) { + ptr = rproc->ops->da_to_va(rproc, da, len); + if (ptr) + goto out; + } + list_for_each_entry(carveout, &rproc->carveouts, node) { int offset = da - carveout->da; @@ -174,6 +193,7 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) break; } +out: return ptr; } EXPORT_SYMBOL(rproc_da_to_va); @@ -411,10 +431,8 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc, } trace = kzalloc(sizeof(*trace), GFP_KERNEL); - if (!trace) { - dev_err(dev, "kzalloc trace failed\n"); + if (!trace) return -ENOMEM; - } /* set the trace buffer dma properties */ trace->len = rsc->len; @@ -489,10 +507,8 @@ static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc, } mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); - if (!mapping) { - dev_err(dev, "kzalloc mapping failed\n"); + if (!mapping) return -ENOMEM; - } ret = iommu_map(rproc->domain, rsc->da, rsc->pa, rsc->len, rsc->flags); if (ret) { @@ -565,10 +581,8 @@ static int rproc_handle_carveout(struct rproc *rproc, rsc->da, rsc->pa, rsc->len, rsc->flags); carveout = kzalloc(sizeof(*carveout), GFP_KERNEL); - if (!carveout) { - dev_err(dev, "kzalloc carveout failed\n"); + if (!carveout) return -ENOMEM; - } va = dma_alloc_coherent(dev->parent, rsc->len, &dma, GFP_KERNEL); if (!va) { @@ -768,7 +782,8 @@ static void rproc_resource_cleanup(struct rproc *rproc) /* clean up carveout allocations */ list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) { - dma_free_coherent(dev->parent, entry->len, entry->va, entry->dma); + dma_free_coherent(dev->parent, entry->len, entry->va, + entry->dma); list_del(&entry->node); kfree(entry); } @@ -808,9 +823,8 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) /* look for the resource table */ table = rproc_find_rsc_table(rproc, fw, &tablesz); - if (!table) { + if (!table) goto clean_up; - } /* Verify that resource table in loaded fw is unchanged */ if (rproc->table_csum != crc32(0, table, tablesz)) { @@ -911,7 +925,8 @@ static void rproc_fw_config_virtio(const struct firmware *fw, void *context) /* count the number of notify-ids */ rproc->max_notifyid = -1; - ret = rproc_handle_resources(rproc, tablesz, rproc_count_vrings_handler); + ret = rproc_handle_resources(rproc, tablesz, + rproc_count_vrings_handler); if (ret) goto out; @@ -1152,6 +1167,50 @@ out: EXPORT_SYMBOL(rproc_shutdown); /** + * rproc_get_by_phandle() - find a remote processor by phandle + * @phandle: phandle to the rproc + * + * Finds an rproc handle using the remote processor's phandle, and then + * return a handle to the rproc. + * + * This function increments the remote processor's refcount, so always + * use rproc_put() to decrement it back once rproc isn't needed anymore. + * + * Returns the rproc handle on success, and NULL on failure. + */ +#ifdef CONFIG_OF +struct rproc *rproc_get_by_phandle(phandle phandle) +{ + struct rproc *rproc = NULL, *r; + struct device_node *np; + + np = of_find_node_by_phandle(phandle); + if (!np) + return NULL; + + mutex_lock(&rproc_list_mutex); + list_for_each_entry(r, &rproc_list, node) { + if (r->dev.parent && r->dev.parent->of_node == np) { + rproc = r; + get_device(&rproc->dev); + break; + } + } + mutex_unlock(&rproc_list_mutex); + + of_node_put(np); + + return rproc; +} +#else +struct rproc *rproc_get_by_phandle(phandle phandle) +{ + return NULL; +} +#endif +EXPORT_SYMBOL(rproc_get_by_phandle); + +/** * rproc_add() - register a remote processor * @rproc: the remote processor handle to register * @@ -1180,6 +1239,11 @@ int rproc_add(struct rproc *rproc) if (ret < 0) return ret; + /* expose to rproc_get_by_phandle users */ + mutex_lock(&rproc_list_mutex); + list_add(&rproc->node, &rproc_list); + mutex_unlock(&rproc_list_mutex); + dev_info(dev, "%s is available\n", rproc->name); dev_info(dev, "Note: remoteproc is still under development and considered experimental.\n"); @@ -1268,10 +1332,8 @@ struct rproc *rproc_alloc(struct device *dev, const char *name, name_len = strlen(name) + strlen(template) - 2 + 1; rproc = kzalloc(sizeof(struct rproc) + len + name_len, GFP_KERNEL); - if (!rproc) { - dev_err(dev, "%s: kzalloc failed\n", __func__); + if (!rproc) return NULL; - } if (!firmware) { p = (char *)rproc + sizeof(struct rproc) + len; @@ -1369,6 +1431,11 @@ int rproc_del(struct rproc *rproc) /* Free the copy of the resource table */ kfree(rproc->cached_table); + /* the rproc is downref'ed as soon as it's removed from the klist */ + mutex_lock(&rproc_list_mutex); + list_del(&rproc->node); + mutex_unlock(&rproc_list_mutex); + device_del(&rproc->dev); return 0; @@ -1411,6 +1478,8 @@ module_init(remoteproc_init); static void __exit remoteproc_exit(void) { + ida_destroy(&rproc_dev_index); + rproc_exit_debugfs(); } module_exit(remoteproc_exit); diff --git a/kernel/drivers/remoteproc/remoteproc_debugfs.c b/kernel/drivers/remoteproc/remoteproc_debugfs.c index 9d30809bb..916af5096 100644 --- a/kernel/drivers/remoteproc/remoteproc_debugfs.c +++ b/kernel/drivers/remoteproc/remoteproc_debugfs.c @@ -156,7 +156,7 @@ rproc_recovery_write(struct file *filp, const char __user *user_buf, char buf[10]; int ret; - if (count > sizeof(buf)) + if (count < 1 || count > sizeof(buf)) return count; ret = copy_from_user(buf, user_buf, count); diff --git a/kernel/drivers/remoteproc/remoteproc_internal.h b/kernel/drivers/remoteproc/remoteproc_internal.h index 70701a50d..8041b95cb 100644 --- a/kernel/drivers/remoteproc/remoteproc_internal.h +++ b/kernel/drivers/remoteproc/remoteproc_internal.h @@ -35,7 +35,7 @@ struct rproc; * @get_boot_addr: get boot address to entry point specified in firmware */ struct rproc_fw_ops { - struct resource_table *(*find_rsc_table) (struct rproc *rproc, + struct resource_table *(*find_rsc_table)(struct rproc *rproc, const struct firmware *fw, int *tablesz); struct resource_table *(*find_loaded_rsc_table)(struct rproc *rproc, diff --git a/kernel/drivers/remoteproc/ste_modem_rproc.c b/kernel/drivers/remoteproc/ste_modem_rproc.c index dd193f35a..53dc17bdd 100644 --- a/kernel/drivers/remoteproc/ste_modem_rproc.c +++ b/kernel/drivers/remoteproc/ste_modem_rproc.c @@ -67,8 +67,7 @@ static int sproc_load_segments(struct rproc *rproc, const struct firmware *fw) static const struct ste_toc_entry *sproc_find_rsc_entry(const void *data) { int i; - const struct ste_toc *toc; - toc = data; + const struct ste_toc *toc = data; /* Search the table for the resource table */ for (i = 0; i < SPROC_MAX_TOC_ENTRIES && @@ -230,6 +229,7 @@ static int sproc_start(struct rproc *rproc) static int sproc_stop(struct rproc *rproc) { struct sproc *sproc = rproc->priv; + sproc_dbg(sproc, "stop ste-modem\n"); return sproc->mdev->ops.power(sproc->mdev, false); diff --git a/kernel/drivers/remoteproc/wkup_m3_rproc.c b/kernel/drivers/remoteproc/wkup_m3_rproc.c new file mode 100644 index 000000000..edf81819c --- /dev/null +++ b/kernel/drivers/remoteproc/wkup_m3_rproc.c @@ -0,0 +1,257 @@ +/* + * TI AMx3 Wakeup M3 Remote Processor driver + * + * Copyright (C) 2014-2015 Texas Instruments, Inc. + * + * Dave Gerlach <d-gerlach@ti.com> + * Suman Anna <s-anna@ti.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of_address.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/remoteproc.h> + +#include <linux/platform_data/wkup_m3.h> + +#include "remoteproc_internal.h" + +#define WKUPM3_MEM_MAX 2 + +/** + * struct wkup_m3_mem - WkupM3 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 from Wakeup M3 view + * @size: Size of the memory region + */ +struct wkup_m3_mem { + void __iomem *cpu_addr; + phys_addr_t bus_addr; + u32 dev_addr; + size_t size; +}; + +/** + * struct wkup_m3_rproc - WkupM3 remote processor state + * @rproc: rproc handle + * @pdev: pointer to platform device + * @mem: WkupM3 memory information + */ +struct wkup_m3_rproc { + struct rproc *rproc; + struct platform_device *pdev; + struct wkup_m3_mem mem[WKUPM3_MEM_MAX]; +}; + +static int wkup_m3_rproc_start(struct rproc *rproc) +{ + struct wkup_m3_rproc *wkupm3 = rproc->priv; + struct platform_device *pdev = wkupm3->pdev; + struct device *dev = &pdev->dev; + struct wkup_m3_platform_data *pdata = dev_get_platdata(dev); + + if (pdata->deassert_reset(pdev, pdata->reset_name)) { + dev_err(dev, "Unable to reset wkup_m3!\n"); + return -ENODEV; + } + + return 0; +} + +static int wkup_m3_rproc_stop(struct rproc *rproc) +{ + struct wkup_m3_rproc *wkupm3 = rproc->priv; + struct platform_device *pdev = wkupm3->pdev; + struct device *dev = &pdev->dev; + struct wkup_m3_platform_data *pdata = dev_get_platdata(dev); + + if (pdata->assert_reset(pdev, pdata->reset_name)) { + dev_err(dev, "Unable to assert reset of wkup_m3!\n"); + return -ENODEV; + } + + return 0; +} + +static void *wkup_m3_rproc_da_to_va(struct rproc *rproc, u64 da, int len) +{ + struct wkup_m3_rproc *wkupm3 = rproc->priv; + void *va = NULL; + int i; + u32 offset; + + if (len <= 0) + return NULL; + + for (i = 0; i < WKUPM3_MEM_MAX; i++) { + if (da >= wkupm3->mem[i].dev_addr && da + len <= + wkupm3->mem[i].dev_addr + wkupm3->mem[i].size) { + offset = da - wkupm3->mem[i].dev_addr; + /* __force to make sparse happy with type conversion */ + va = (__force void *)(wkupm3->mem[i].cpu_addr + offset); + break; + } + } + + return va; +} + +static struct rproc_ops wkup_m3_rproc_ops = { + .start = wkup_m3_rproc_start, + .stop = wkup_m3_rproc_stop, + .da_to_va = wkup_m3_rproc_da_to_va, +}; + +static const struct of_device_id wkup_m3_rproc_of_match[] = { + { .compatible = "ti,am3352-wkup-m3", }, + { .compatible = "ti,am4372-wkup-m3", }, + {}, +}; + +static int wkup_m3_rproc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct wkup_m3_platform_data *pdata = dev->platform_data; + /* umem always needs to be processed first */ + const char *mem_names[WKUPM3_MEM_MAX] = { "umem", "dmem" }; + struct wkup_m3_rproc *wkupm3; + const char *fw_name; + struct rproc *rproc; + struct resource *res; + const __be32 *addrp; + u32 l4_offset = 0; + u64 size; + int ret; + int i; + + if (!(pdata && pdata->deassert_reset && pdata->assert_reset && + pdata->reset_name)) { + dev_err(dev, "Platform data missing!\n"); + return -ENODEV; + } + + ret = of_property_read_string(dev->of_node, "ti,pm-firmware", + &fw_name); + if (ret) { + dev_err(dev, "No firmware filename given\n"); + return -ENODEV; + } + + pm_runtime_enable(&pdev->dev); + ret = pm_runtime_get_sync(&pdev->dev); + if (ret < 0) { + dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n"); + goto err; + } + + rproc = rproc_alloc(dev, "wkup_m3", &wkup_m3_rproc_ops, + fw_name, sizeof(*wkupm3)); + if (!rproc) { + ret = -ENOMEM; + goto err; + } + + wkupm3 = rproc->priv; + wkupm3->rproc = rproc; + wkupm3->pdev = pdev; + + for (i = 0; i < ARRAY_SIZE(mem_names); i++) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + mem_names[i]); + wkupm3->mem[i].cpu_addr = devm_ioremap_resource(dev, res); + if (IS_ERR(wkupm3->mem[i].cpu_addr)) { + dev_err(&pdev->dev, "devm_ioremap_resource failed for resource %d\n", + i); + ret = PTR_ERR(wkupm3->mem[i].cpu_addr); + goto err; + } + wkupm3->mem[i].bus_addr = res->start; + wkupm3->mem[i].size = resource_size(res); + addrp = of_get_address(dev->of_node, i, &size, NULL); + /* + * The wkupm3 has umem at address 0 in its view, so the device + * addresses for each memory region is computed as a relative + * offset of the bus address for umem, and therefore needs to be + * processed first. + */ + if (!strcmp(mem_names[i], "umem")) + l4_offset = be32_to_cpu(*addrp); + wkupm3->mem[i].dev_addr = be32_to_cpu(*addrp) - l4_offset; + } + + dev_set_drvdata(dev, rproc); + + ret = rproc_add(rproc); + if (ret) { + dev_err(dev, "rproc_add failed\n"); + goto err_put_rproc; + } + + return 0; + +err_put_rproc: + rproc_put(rproc); +err: + pm_runtime_put_noidle(dev); + pm_runtime_disable(dev); + return ret; +} + +static int wkup_m3_rproc_remove(struct platform_device *pdev) +{ + struct rproc *rproc = platform_get_drvdata(pdev); + + rproc_del(rproc); + rproc_put(rproc); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return 0; +} + +#ifdef CONFIG_PM +static int wkup_m3_rpm_suspend(struct device *dev) +{ + return -EBUSY; +} + +static int wkup_m3_rpm_resume(struct device *dev) +{ + return 0; +} +#endif + +static const struct dev_pm_ops wkup_m3_rproc_pm_ops = { + SET_RUNTIME_PM_OPS(wkup_m3_rpm_suspend, wkup_m3_rpm_resume, NULL) +}; + +static struct platform_driver wkup_m3_rproc_driver = { + .probe = wkup_m3_rproc_probe, + .remove = wkup_m3_rproc_remove, + .driver = { + .name = "wkup_m3_rproc", + .of_match_table = wkup_m3_rproc_of_match, + .pm = &wkup_m3_rproc_pm_ops, + }, +}; + +module_platform_driver(wkup_m3_rproc_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("TI Wakeup M3 remote processor control driver"); +MODULE_AUTHOR("Dave Gerlach <d-gerlach@ti.com>"); |