Re: [PATCH v2 3/5] venus: add check to make scm calls

Jordan Crouse
2018-06-01T21:23:03Z

On Sat, Jun 02, 2018 at 01:56:06AM +0530, Vikash Garodia wrote:
> Split the boot api into firmware load and hardware
> boot. Also add the checks to invoke scm calls only
> if the platform has the required support.
>
> Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>
> ---
> drivers/media/platform/qcom/venus/core.c | 4 +-
> drivers/media/platform/qcom/venus/firmware.c | 65 ++++++++++++++++++----------
> drivers/media/platform/qcom/venus/firmware.h | 2 +-
> 3 files changed, 45 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
> index 1308488..9a95f9a 100644
> --- a/drivers/media/platform/qcom/venus/core.c
> +++ b/drivers/media/platform/qcom/venus/core.c
> @@ -84,7 +84,7 @@ static void venus_sys_error_handler(struct work_struct *work)
>
> pm_runtime_get_sync(core->dev);
>
> - ret |= venus_boot(core->dev, core->res->fwname);
> + ret |= venus_boot(core);
>
> ret |= hfi_core_resume(core, true);
>
> @@ -279,7 +279,7 @@ static int venus_probe(struct platform_device *pdev)
> if (ret < 0)
> goto err_runtime_disable;
>
> - ret = venus_boot(dev, core->res->fwname);
> + ret = venus_boot(core);
> if (ret)
> goto err_runtime_disable;
>
> diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
> index b4664ed..cb7f48ef 100644
> --- a/drivers/media/platform/qcom/venus/firmware.c
> +++ b/drivers/media/platform/qcom/venus/firmware.c
> @@ -81,40 +81,35 @@ int venus_set_hw_state(enum tzbsp_video_state state, struct venus_core *core)
> }
> EXPORT_SYMBOL_GPL(venus_set_hw_state);
>
> -int venus_boot(struct device *dev, const char *fwname)
> +static int venus_load_fw(struct device *dev, const char *fwname,
> + phys_addr_t *mem_phys, size_t *mem_size)
> {
> const struct firmware *mdt;
> struct device_node *node;
> - phys_addr_t mem_phys;
> struct resource r;
> ssize_t fw_size;
> - size_t mem_size;
> void *mem_va;
> int ret;
>
> - if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER) || !qcom_scm_is_available())
> - return -EPROBE_DEFER;
> -
> node = of_parse_phandle(dev->of_node, "memory-region", 0);
> if (!node) {
> dev_err(dev, "no memory-region specified\n");
> return -EINVAL;
> }
> -

Unrelated whitespace change. Not needed.
> ret = of_address_to_resource(node, 0, &r);
> if (ret)
> return ret;
>
> - mem_phys = r.start;
> - mem_size = resource_size(&r);
> + *mem_phys = r.start;
> + *mem_size = resource_size(&r);
>
> - if (mem_size < VENUS_FW_MEM_SIZE)
> + if (*mem_size < VENUS_FW_MEM_SIZE)
> return -EINVAL;
>
> - mem_va = memremap(r.start, mem_size, MEMREMAP_WC);
> + mem_va = memremap(r.start, *mem_size, MEMREMAP_WC);
> if (!mem_va) {
> dev_err(dev, "unable to map memory region: %pa+%zx\n",
> - &r.start, mem_size);
> + &r.start, *mem_size);
> return -ENOMEM;
> }
>
> @@ -128,25 +123,49 @@ int venus_boot(struct device *dev, const char *fwname)
> release_firmware(mdt);
> goto err_unmap;
> }
> -
> - ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID, mem_va, mem_phys,
> - mem_size);
> + if (qcom_scm_is_available())
> + ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID, mem_va,
> + *mem_phys, *mem_size, NULL);
> + else
> + ret = qcom_mdt_load_no_init(dev, mdt, fwname, VENUS_PAS_ID,
> + mem_va, *mem_phys, *mem_size, NULL);
>
> release_firmware(mdt);
>
> - if (ret)
> - goto err_unmap;
> -
> - ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
> - if (ret)
> - goto err_unmap;
> -
> err_unmap:
> memunmap(mem_va);
> return ret;
> }
> +int venus_boot(struct venus_core *core)
> +{
> + phys_addr_t mem_phys;
> + size_t mem_size;
> + int ret;
> + struct device *dev;
> +
> + if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER))
> + return -EPROBE_DEFER;
> +
> + dev = core->dev;
> +
> + ret = venus_load_fw(dev, core->res->fwname, &mem_phys, &mem_size);
> + if (ret) {
> + dev_err(dev, "fail to load video firmware\n");
> + return -EINVAL;
> + }
> +
> + if (qcom_scm_is_available())
> + ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(venus_boot);
>
> int venus_shutdown(struct device *dev)
> {
> - return qcom_scm_pas_shutdown(VENUS_PAS_ID);
> + int ret = 0;
> +
> + if (qcom_scm_is_available())
> + ret = qcom_scm_pas_shutdown(VENUS_PAS_ID);
> + return ret;
> }
> diff --git a/drivers/media/platform/qcom/venus/firmware.h b/drivers/media/platform/qcom/venus/firmware.h
> index 1336729..0916826 100644
> --- a/drivers/media/platform/qcom/venus/firmware.h
> +++ b/drivers/media/platform/qcom/venus/firmware.h
> @@ -16,7 +16,7 @@
>
> struct device;
>
> -int venus_boot(struct device *dev, const char *fwname);
> +int venus_boot(struct venus_core *core);
> int venus_shutdown(struct device *dev);
> int venus_set_hw_state(enum tzbsp_video_state, struct venus_core *core);

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