diff options
| -rw-r--r-- | drivers/firmware/qcom_scm.c | 39 | ||||
| -rw-r--r-- | drivers/soc/qcom/mdt_loader.c | 2 | ||||
| -rw-r--r-- | include/linux/qcom_scm.h | 10 |
3 files changed, 44 insertions, 7 deletions
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index 927738882e54..00f8a50b9f6a 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -432,10 +432,16 @@ static void qcom_scm_set_download_mode(bool enable) * and optional blob of data used for authenticating the metadata * and the rest of the firmware * @size: size of the metadata + * @ctx: optional metadata context * - * Returns 0 on success. + * Return: 0 on success. + * + * Upon successful return, the PAS metadata context (@ctx) will be used to + * track the metadata allocation, this needs to be released by invoking + * qcom_scm_pas_metadata_release() by the caller. */ -int qcom_scm_pas_init_image(u32 peripheral, const void *metadata, size_t size) +int qcom_scm_pas_init_image(u32 peripheral, const void *metadata, size_t size, + struct qcom_scm_pas_metadata *ctx) { dma_addr_t mdata_phys; void *mdata_buf; @@ -464,7 +470,7 @@ int qcom_scm_pas_init_image(u32 peripheral, const void *metadata, size_t size) ret = qcom_scm_clk_enable(); if (ret) - goto free_metadata; + goto out; desc.args[1] = mdata_phys; @@ -472,14 +478,37 @@ int qcom_scm_pas_init_image(u32 peripheral, const void *metadata, size_t size) qcom_scm_clk_disable(); -free_metadata: - dma_free_coherent(__scm->dev, size, mdata_buf, mdata_phys); +out: + if (ret < 0 || !ctx) { + dma_free_coherent(__scm->dev, size, mdata_buf, mdata_phys); + } else if (ctx) { + ctx->ptr = mdata_buf; + ctx->phys = mdata_phys; + ctx->size = size; + } return ret ? : res.result[0]; } EXPORT_SYMBOL(qcom_scm_pas_init_image); /** + * qcom_scm_pas_metadata_release() - release metadata context + * @ctx: metadata context + */ +void qcom_scm_pas_metadata_release(struct qcom_scm_pas_metadata *ctx) +{ + if (!ctx->ptr) + return; + + dma_free_coherent(__scm->dev, ctx->size, ctx->ptr, ctx->phys); + + ctx->ptr = NULL; + ctx->phys = 0; + ctx->size = 0; +} +EXPORT_SYMBOL(qcom_scm_pas_metadata_release); + +/** * qcom_scm_pas_mem_setup() - Prepare the memory related to a given peripheral * for firmware loading * @peripheral: peripheral id diff --git a/drivers/soc/qcom/mdt_loader.c b/drivers/soc/qcom/mdt_loader.c index 72fc2b539213..b00586db5391 100644 --- a/drivers/soc/qcom/mdt_loader.c +++ b/drivers/soc/qcom/mdt_loader.c @@ -171,7 +171,7 @@ static int __qcom_mdt_load(struct device *dev, const struct firmware *fw, goto out; } - ret = qcom_scm_pas_init_image(pas_id, metadata, metadata_len); + ret = qcom_scm_pas_init_image(pas_id, metadata, metadata_len, NULL); kfree(metadata); if (ret) { diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h index ca4a88d7cbdc..681748619890 100644 --- a/include/linux/qcom_scm.h +++ b/include/linux/qcom_scm.h @@ -68,8 +68,16 @@ extern int qcom_scm_set_warm_boot_addr(void *entry, const cpumask_t *cpus); extern void qcom_scm_cpu_power_down(u32 flags); extern int qcom_scm_set_remote_state(u32 state, u32 id); +struct qcom_scm_pas_metadata { + void *ptr; + dma_addr_t phys; + ssize_t size; +}; + extern int qcom_scm_pas_init_image(u32 peripheral, const void *metadata, - size_t size); + size_t size, + struct qcom_scm_pas_metadata *ctx); +void qcom_scm_pas_metadata_release(struct qcom_scm_pas_metadata *ctx); extern int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr, phys_addr_t size); extern int qcom_scm_pas_auth_and_reset(u32 peripheral); |