diff mbox series

[v3,10/15] firmware: qcom: scm: make qcom_scm_qseecom_app_get_id() use the TZ allocator

Message ID 20231009153427.20951-11-brgl@bgdev.pl (mailing list archive)
State New, archived
Headers show
Series arm64: qcom: add and enable SHM Bridge support | expand

Commit Message

Bartosz Golaszewski Oct. 9, 2023, 3:34 p.m. UTC
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Let's use the new TZ memory allocator to obtain a buffer for this call
instead of manually kmalloc()ing it and then mapping to physical space.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/firmware/qcom/qcom_scm.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

Comments

Andrew Halaney Oct. 10, 2023, 10:28 p.m. UTC | #1
On Mon, Oct 09, 2023 at 05:34:22PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> Let's use the new TZ memory allocator to obtain a buffer for this call
> instead of manually kmalloc()ing it and then mapping to physical space.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Reviewed-by: Andrew Halaney <ahalaney@redhat.com>

> ---
>  drivers/firmware/qcom/qcom_scm.c | 18 ++++--------------
>  1 file changed, 4 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c
> index 11638daa2fe5..3a6cefb4eb2e 100644
> --- a/drivers/firmware/qcom/qcom_scm.c
> +++ b/drivers/firmware/qcom/qcom_scm.c
> @@ -1525,37 +1525,27 @@ int qcom_scm_qseecom_app_get_id(const char *app_name, u32 *app_id)
>  	unsigned long app_name_len = strlen(app_name);
>  	struct qcom_scm_desc desc = {};
>  	struct qcom_scm_qseecom_resp res = {};
> -	dma_addr_t name_buf_phys;
> -	char *name_buf;
>  	int status;
>  
>  	if (app_name_len >= name_buf_size)
>  		return -EINVAL;
>  
> -	name_buf = kzalloc(name_buf_size, GFP_KERNEL);
> +	char *name_buf __free(qcom_tzmem) = qcom_tzmem_alloc(__scm->mempool,
> +							     name_buf_size,
> +							     GFP_KERNEL);
>  	if (!name_buf)
>  		return -ENOMEM;
>  
>  	memcpy(name_buf, app_name, app_name_len);
>  
> -	name_buf_phys = dma_map_single(__scm->dev, name_buf, name_buf_size, DMA_TO_DEVICE);
> -	status = dma_mapping_error(__scm->dev, name_buf_phys);
> -	if (status) {
> -		kfree(name_buf);
> -		dev_err(__scm->dev, "qseecom: failed to map dma address\n");
> -		return status;
> -	}
> -
>  	desc.owner = QSEECOM_TZ_OWNER_QSEE_OS;
>  	desc.svc = QSEECOM_TZ_SVC_APP_MGR;
>  	desc.cmd = QSEECOM_TZ_CMD_APP_LOOKUP;
>  	desc.arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_RW, QCOM_SCM_VAL);
> -	desc.args[0] = name_buf_phys;
> +	desc.args[0] = qcom_tzmem_to_phys(name_buf);
>  	desc.args[1] = app_name_len;
>  
>  	status = qcom_scm_qseecom_call(&desc, &res);
> -	dma_unmap_single(__scm->dev, name_buf_phys, name_buf_size, DMA_TO_DEVICE);
> -	kfree(name_buf);
>  
>  	if (status)
>  		return status;
> -- 
> 2.39.2
>
Maximilian Luz Oct. 11, 2023, 8:09 p.m. UTC | #2
On 10/9/23 17:34, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> Let's use the new TZ memory allocator to obtain a buffer for this call
> instead of manually kmalloc()ing it and then mapping to physical space.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Tested-by: Maximilian Luz <luzmaximilian@gmail.com>

I've tested the whole series with both QCOM_TZMEM_MODE_DEFAULT and
QCOM_TZMEM_MODE_SHMBRIDGE. Everything seems to work fine on my Surface
Pro X (sc8180x), but I've only really tested the qseecom-related parts
(hence my TB only for those).

I'll try to do a proper review of the two qseecom patches in the next
couple of days.

> ---
>   drivers/firmware/qcom/qcom_scm.c | 18 ++++--------------
>   1 file changed, 4 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c
> index 11638daa2fe5..3a6cefb4eb2e 100644
> --- a/drivers/firmware/qcom/qcom_scm.c
> +++ b/drivers/firmware/qcom/qcom_scm.c
> @@ -1525,37 +1525,27 @@ int qcom_scm_qseecom_app_get_id(const char *app_name, u32 *app_id)
>   	unsigned long app_name_len = strlen(app_name);
>   	struct qcom_scm_desc desc = {};
>   	struct qcom_scm_qseecom_resp res = {};
> -	dma_addr_t name_buf_phys;
> -	char *name_buf;
>   	int status;
>   
>   	if (app_name_len >= name_buf_size)
>   		return -EINVAL;
>   
> -	name_buf = kzalloc(name_buf_size, GFP_KERNEL);
> +	char *name_buf __free(qcom_tzmem) = qcom_tzmem_alloc(__scm->mempool,
> +							     name_buf_size,
> +							     GFP_KERNEL);
>   	if (!name_buf)
>   		return -ENOMEM;
>   
>   	memcpy(name_buf, app_name, app_name_len);
>   
> -	name_buf_phys = dma_map_single(__scm->dev, name_buf, name_buf_size, DMA_TO_DEVICE);
> -	status = dma_mapping_error(__scm->dev, name_buf_phys);
> -	if (status) {
> -		kfree(name_buf);
> -		dev_err(__scm->dev, "qseecom: failed to map dma address\n");
> -		return status;
> -	}
> -
>   	desc.owner = QSEECOM_TZ_OWNER_QSEE_OS;
>   	desc.svc = QSEECOM_TZ_SVC_APP_MGR;
>   	desc.cmd = QSEECOM_TZ_CMD_APP_LOOKUP;
>   	desc.arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_RW, QCOM_SCM_VAL);
> -	desc.args[0] = name_buf_phys;
> +	desc.args[0] = qcom_tzmem_to_phys(name_buf);
>   	desc.args[1] = app_name_len;
>   
>   	status = qcom_scm_qseecom_call(&desc, &res);
> -	dma_unmap_single(__scm->dev, name_buf_phys, name_buf_size, DMA_TO_DEVICE);
> -	kfree(name_buf);
>   
>   	if (status)
>   		return status;
diff mbox series

Patch

diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c
index 11638daa2fe5..3a6cefb4eb2e 100644
--- a/drivers/firmware/qcom/qcom_scm.c
+++ b/drivers/firmware/qcom/qcom_scm.c
@@ -1525,37 +1525,27 @@  int qcom_scm_qseecom_app_get_id(const char *app_name, u32 *app_id)
 	unsigned long app_name_len = strlen(app_name);
 	struct qcom_scm_desc desc = {};
 	struct qcom_scm_qseecom_resp res = {};
-	dma_addr_t name_buf_phys;
-	char *name_buf;
 	int status;
 
 	if (app_name_len >= name_buf_size)
 		return -EINVAL;
 
-	name_buf = kzalloc(name_buf_size, GFP_KERNEL);
+	char *name_buf __free(qcom_tzmem) = qcom_tzmem_alloc(__scm->mempool,
+							     name_buf_size,
+							     GFP_KERNEL);
 	if (!name_buf)
 		return -ENOMEM;
 
 	memcpy(name_buf, app_name, app_name_len);
 
-	name_buf_phys = dma_map_single(__scm->dev, name_buf, name_buf_size, DMA_TO_DEVICE);
-	status = dma_mapping_error(__scm->dev, name_buf_phys);
-	if (status) {
-		kfree(name_buf);
-		dev_err(__scm->dev, "qseecom: failed to map dma address\n");
-		return status;
-	}
-
 	desc.owner = QSEECOM_TZ_OWNER_QSEE_OS;
 	desc.svc = QSEECOM_TZ_SVC_APP_MGR;
 	desc.cmd = QSEECOM_TZ_CMD_APP_LOOKUP;
 	desc.arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_RW, QCOM_SCM_VAL);
-	desc.args[0] = name_buf_phys;
+	desc.args[0] = qcom_tzmem_to_phys(name_buf);
 	desc.args[1] = app_name_len;
 
 	status = qcom_scm_qseecom_call(&desc, &res);
-	dma_unmap_single(__scm->dev, name_buf_phys, name_buf_size, DMA_TO_DEVICE);
-	kfree(name_buf);
 
 	if (status)
 		return status;