diff mbox series

[v2] misc: fastrpc: Pass proper scm arguments for static process init

Message ID 1687528664-25235-1-git-send-email-quic_ekangupt@quicinc.com
State New
Headers
Series [v2] misc: fastrpc: Pass proper scm arguments for static process init |

Commit Message

Ekansh Gupta June 23, 2023, 1:57 p.m. UTC 
  Memory is allocated for dynamic loading when audio daemon is trying
to attach to audioPD on DSP side. This memory is allocated from
reserved CMA memory region and needs ownership assignment to
new VMID in order to use it from audioPD.

In the current implementation, arguments are not correctly passed
to the scm call which might result in failure of dynamic loading
on audioPD. Added changes to pass correct arguments during daemon
attach request.

Fixes: 	0871561055e6 ("misc: fastrpc: Add support for audiopd")
Cc: stable <stable@kernel.org>
Tested-by: Ekansh Gupta <quic_ekangupt@quicinc.com>
Signed-off-by: Ekansh Gupta <quic_ekangupt@quicinc.com>
---
Changes in v2:
  - Removed redundant code

 drivers/misc/fastrpc.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

Comments

Srinivas Kandagatla July 28, 2023, 11:02 a.m. UTC | #1 
On 23/06/2023 14:57, Ekansh Gupta wrote:
> Memory is allocated for dynamic loading when audio daemon is trying
> to attach to audioPD on DSP side. This memory is allocated from
> reserved CMA memory region and needs ownership assignment to
> new VMID in order to use it from audioPD.
> 
> In the current implementation, arguments are not correctly passed
> to the scm call which might result in failure of dynamic loading
> on audioPD. Added changes to pass correct arguments during daemon
> attach request.
> 
> Fixes: 	0871561055e6 ("misc: fastrpc: Add support for audiopd")
> Cc: stable <stable@kernel.org>
> Tested-by: Ekansh Gupta <quic_ekangupt@quicinc.com>
> Signed-off-by: Ekansh Gupta <quic_ekangupt@quicinc.com>
> ---
> Changes in v2:
>    - Removed redundant code
> 
>   drivers/misc/fastrpc.c | 18 ++++++++++++------
>   1 file changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
> index 30d4d04..9a7074a 100644
> --- a/drivers/misc/fastrpc.c
> +++ b/drivers/misc/fastrpc.c
> @@ -1278,10 +1278,11 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
>   
>   		/* Map if we have any heap VMIDs associated with this ADSP Static Process. */
>   		if (fl->cctx->vmcount) {
<--snip
> +			u64 src_perms = BIT(QCOM_SCM_VMID_HLOS);
> +
>   			err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys,
>   							(u64)fl->cctx->remote_heap->size,
> -							&fl->cctx->perms,
> -							fl->cctx->vmperms, fl->cctx->vmcount);
> +							&src_perms, fl->cctx->vmperms, fl->cctx->vmcount);
-->

this change looks unnecessary channel context already sets its value to 
BIT(QCOM_SCM_VMID_HLOS);


>   			if (err) {
>   				dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d",
>   					fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err);
> @@ -1322,13 +1323,18 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
>   	return 0;
>   err_invoke:
>   	if (fl->cctx->vmcount) {
> -		struct qcom_scm_vmperm perm;
> +		u64 src_perms = 0;
> +		struct qcom_scm_vmperm dst_perms;
> +		u32 i;
>   
> -		perm.vmid = QCOM_SCM_VMID_HLOS;
> -		perm.perm = QCOM_SCM_PERM_RWX;
> +		for (i = 0; i < fl->cctx->vmcount; i++)
> +			src_perms |= BIT(fl->cctx->vmperms[i].vmid);
> +
> +		dst_perms.vmid = QCOM_SCM_VMID_HLOS;
> +		dst_perms.perm = QCOM_SCM_PERM_RWX;
>   		err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys,
>   						(u64)fl->cctx->remote_heap->size,
> -						&fl->cctx->perms, &perm, 1);
> +						&src_perms, &dst_perms, 1);

this looks good.

--srini
>   		if (err)
>   			dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d",
>   				fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err);
diff mbox series

Patch

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 30d4d04..9a7074a 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -1278,10 +1278,11 @@  static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
 
 		/* Map if we have any heap VMIDs associated with this ADSP Static Process. */
 		if (fl->cctx->vmcount) {
+			u64 src_perms = BIT(QCOM_SCM_VMID_HLOS);
+
 			err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys,
 							(u64)fl->cctx->remote_heap->size,
-							&fl->cctx->perms,
-							fl->cctx->vmperms, fl->cctx->vmcount);
+							&src_perms, fl->cctx->vmperms, fl->cctx->vmcount);
 			if (err) {
 				dev_err(fl->sctx->dev, "Failed to assign memory with phys 0x%llx size 0x%llx err %d",
 					fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err);
@@ -1322,13 +1323,18 @@  static int fastrpc_init_create_static_process(struct fastrpc_user *fl,
 	return 0;
 err_invoke:
 	if (fl->cctx->vmcount) {
-		struct qcom_scm_vmperm perm;
+		u64 src_perms = 0;
+		struct qcom_scm_vmperm dst_perms;
+		u32 i;
 
-		perm.vmid = QCOM_SCM_VMID_HLOS;
-		perm.perm = QCOM_SCM_PERM_RWX;
+		for (i = 0; i < fl->cctx->vmcount; i++)
+			src_perms |= BIT(fl->cctx->vmperms[i].vmid);
+
+		dst_perms.vmid = QCOM_SCM_VMID_HLOS;
+		dst_perms.perm = QCOM_SCM_PERM_RWX;
 		err = qcom_scm_assign_mem(fl->cctx->remote_heap->phys,
 						(u64)fl->cctx->remote_heap->size,
-						&fl->cctx->perms, &perm, 1);
+						&src_perms, &dst_perms, 1);
 		if (err)
 			dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d",
 				fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err);