This driver will load and authenticate the Venus firmware and bringing it core out of reset. Those two functionalities are via secure monitor calls to trusted environment. Signed-off-by: Stanimir Varbanov <stanimir.varbanov@xxxxxxxxxx> --- drivers/remoteproc/Kconfig | 10 ++ drivers/remoteproc/Makefile | 1 + drivers/remoteproc/qcom_venus_pil.c | 226 ++++++++++++++++++++++++++++++++++++ 3 files changed, 237 insertions(+) create mode 100644 drivers/remoteproc/qcom_venus_pil.c diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index f76b3b1dca1a..90f66cfe054f 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -107,6 +107,16 @@ config QCOM_WCNSS_PIL Say y here to support the Peripheral Image Loader for the Qualcomm Wireless Connectivity Subsystem. +config QCOM_VENUS_PIL + tristate "Qualcomm Venus Peripheral Image Loader" + depends on OF && ARCH_QCOM + depends on QCOM_SCM + select QCOM_MDT_LOADER + select REMOTEPROC + help + Say y here to support Qualcomm Peripherial Image Loader for the + Venus remote processor. + config ST_REMOTEPROC tristate "ST remoteproc support" depends on ARCH_STI diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile index 6dfb62ed643f..852711b89844 100644 --- a/drivers/remoteproc/Makefile +++ b/drivers/remoteproc/Makefile @@ -15,4 +15,5 @@ obj-$(CONFIG_QCOM_MDT_LOADER) += qcom_mdt_loader.o obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o obj-$(CONFIG_QCOM_WCNSS_IRIS) += qcom_wcnss_iris.o obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss.o +obj-$(CONFIG_QCOM_VENUS_PIL) += qcom_venus_pil.o obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o diff --git a/drivers/remoteproc/qcom_venus_pil.c b/drivers/remoteproc/qcom_venus_pil.c new file mode 100644 index 000000000000..891c7d9a96bf --- /dev/null +++ b/drivers/remoteproc/qcom_venus_pil.c @@ -0,0 +1,226 @@ +/* + * Qualcomm Venus Peripheral Image Loader + * + * Copyright (C) 2016 Linaro Ltd + * + * 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/dma-mapping.h> +#include <linux/firmware.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_reserved_mem.h> +#include <linux/platform_device.h> +#include <linux/qcom_scm.h> +#include <linux/remoteproc.h> + +#include "qcom_mdt_loader.h" +#include "remoteproc_internal.h" + +#define VENUS_CRASH_REASON_SMEM 425 +#define VENUS_FIRMWARE_NAME "venus.mdt" +#define VENUS_PAS_ID 9 +#define VENUS_FW_MEM_SIZE SZ_8M +#define VENUS_PGTABLE_OFFSET (6 * SZ_1M) + +struct qcom_venus { + struct device *dev; + struct rproc *rproc; + phys_addr_t fw_addr; + phys_addr_t mem_phys; + void *mem_va; + size_t mem_size; + size_t pgtable_sz; +}; + +static int venus_load(struct rproc *rproc, const struct firmware *fw) +{ + struct qcom_venus *venus = rproc->priv; + phys_addr_t pa; + size_t fw_size; + bool relocate; + int ret; + + ret = qcom_scm_pas_init_image(VENUS_PAS_ID, fw->data, fw->size); + if (ret) { + dev_err(&rproc->dev, "invalid firmware metadata (%d)\n", ret); + return -EINVAL; + } + + ret = qcom_mdt_parse(fw, &venus->fw_addr, &fw_size, &relocate); + if (ret) { + dev_err(&rproc->dev, "failed to parse mdt header (%d)\n", ret); + return ret; + } + + if (fw_size + venus->pgtable_sz > venus->mem_size) + return -ENOMEM; + + pa = relocate ? venus->mem_phys : venus->fw_addr; + + ret = qcom_scm_pas_mem_setup(VENUS_PAS_ID, pa, fw_size); + if (ret) { + dev_err(&rproc->dev, "unable to setup memory (%d)\n", ret); + return -EINVAL; + } + + return qcom_mdt_load(rproc, fw, VENUS_FIRMWARE_NAME); +} + +static const struct rproc_fw_ops venus_fw_ops = { + .find_rsc_table = qcom_mdt_find_rsc_table, + .load = venus_load, +}; + +static int venus_start(struct rproc *rproc) +{ + struct qcom_venus *venus = rproc->priv; + int ret; + + ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID); + if (ret) + dev_err(venus->dev, + "authentication image and release reset failed (%d)\n", + ret); + + return ret; +} + +static int venus_stop(struct rproc *rproc) +{ + struct qcom_venus *venus = rproc->priv; + int ret; + + ret = qcom_scm_pas_shutdown(VENUS_PAS_ID); + if (ret) + dev_err(venus->dev, "failed to shutdown: %d\n", ret); + + return ret; +} + +static void *venus_da_to_va(struct rproc *rproc, u64 da, int len) +{ + struct qcom_venus *venus = rproc->priv; + s64 offset; + + offset = da - venus->fw_addr; + + if (offset < 0 || offset + len > venus->mem_size) + return NULL; + + return venus->mem_va + offset; +} + +static const struct rproc_ops venus_ops = { + .start = venus_start, + .stop = venus_stop, + .da_to_va = venus_da_to_va, +}; + +static int venus_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct qcom_venus *venus; + struct rproc *rproc; + dma_addr_t pgaddr; + int ret; + + if (!qcom_scm_is_available()) + return -EPROBE_DEFER; + + if (!qcom_scm_pas_supported(VENUS_PAS_ID)) { + dev_err(dev, "PAS is not available for venus\n"); + return -ENXIO; + } + + ret = of_reserved_mem_device_init(dev); + if (ret) + return ret; + + rproc = rproc_alloc(dev, pdev->name, &venus_ops, VENUS_FIRMWARE_NAME, + sizeof(*venus)); + if (!rproc) { + dev_err(dev, "unable to allocate remoteproc\n"); + ret = -ENOMEM; + goto release_mem; + } + + rproc->fw_ops = &venus_fw_ops; + venus = rproc->priv; + venus->dev = dev; + venus->rproc = rproc; + venus->mem_size = VENUS_FW_MEM_SIZE; + + platform_set_drvdata(pdev, venus); + + venus->mem_va = dma_alloc_coherent(dev, venus->mem_size, + &venus->mem_phys, GFP_KERNEL); + if (!venus->mem_va) { + ret = -ENOMEM; + goto free_rproc; + } + + ret = qcom_scm_iommu_secure_ptbl_size(0, &venus->pgtable_sz); + if (ret) + goto free_mem; + + pgaddr = venus->mem_phys + VENUS_PGTABLE_OFFSET; + + ret = qcom_scm_iommu_secure_ptbl_init(pgaddr, venus->pgtable_sz, 0); + if (ret) + goto free_mem; + + ret = rproc_add(rproc); + if (ret) + goto free_mem; + + return 0; + +free_mem: + dma_free_coherent(dev, venus->mem_size, venus->mem_va, venus->mem_phys); +free_rproc: + rproc_put(rproc); +release_mem: + of_reserved_mem_device_release(dev); + + return ret; +} + +static int venus_remove(struct platform_device *pdev) +{ + struct qcom_venus *venus = platform_get_drvdata(pdev); + struct device *dev = venus->dev; + + rproc_del(venus->rproc); + rproc_put(venus->rproc); + dma_free_coherent(dev, venus->mem_size, venus->mem_va, venus->mem_phys); + of_reserved_mem_device_release(dev); + + return 0; +} + +static const struct of_device_id venus_of_match[] = { + { .compatible = "qcom,venus-pil" }, + { }, +}; + +static struct platform_driver venus_driver = { + .probe = venus_probe, + .remove = venus_remove, + .driver = { + .name = "qcom-venus-pil", + .of_match_table = venus_of_match, + }, +}; + +module_platform_driver(venus_driver); +MODULE_DESCRIPTION("Peripheral Image Loader for Venus"); +MODULE_LICENSE("GPL v2"); -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html