diff mbox series

[v2,2/2] misc: fastrpc: use coherent pool for untranslated Compute Banks

Message ID 20230327184204.498032-3-me@dylanvanassche.be
State New
Headers
Series misc: fastrpc: FastRPC reserved memory assignment for SDM845 SLPI |

Commit Message

Dylan Van Assche March 27, 2023, 6:42 p.m. UTC 
  Use fastrpc_remote_heap_alloc to allocate from the FastRPC device
instead of the Compute Bank when the session ID is 0. This ensures
that the allocation is inside the coherent DMA pool which is already
accessible to the DSP. This is necessary to support FastRPC devices
which do not have dedicated Compute Banks such as the SLPI on the SDM845.
The latter uses an allocated CMA region instead of FastRPC Compute Banks.

Signed-off-by: Dylan Van Assche <me@dylanvanassche.be>
---
 drivers/misc/fastrpc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

Caleb Connolly May 6, 2023, 5:30 p.m. UTC | #1 
On 27/03/2023 19:42, Dylan Van Assche wrote:
> Use fastrpc_remote_heap_alloc to allocate from the FastRPC device
> instead of the Compute Bank when the session ID is 0. This ensures
> that the allocation is inside the coherent DMA pool which is already
> accessible to the DSP. This is necessary to support FastRPC devices
> which do not have dedicated Compute Banks such as the SLPI on the SDM845.
> The latter uses an allocated CMA region instead of FastRPC Compute Banks.
>
> Signed-off-by: Dylan Van Assche <me@dylanvanassche.be>

Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
> ---
>  drivers/misc/fastrpc.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
> index caf2ae556956..b7ddf6b90022 100644
> --- a/drivers/misc/fastrpc.c
> +++ b/drivers/misc/fastrpc.c
> @@ -939,7 +939,10 @@ static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx)
>
>  	ctx->msg_sz = pkt_size;
>
> -	err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
> +	if (ctx->fl->sctx->sid)
> +		err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
> +	else
> +		err = fastrpc_remote_heap_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
>  	if (err)
>  		return err;
>
> --
> 2.39.2
>

--
Kind Regards,
Caleb
diff mbox series

Patch

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index caf2ae556956..b7ddf6b90022 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -939,7 +939,10 @@  static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx)
 
 	ctx->msg_sz = pkt_size;
 
-	err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
+	if (ctx->fl->sctx->sid)
+		err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
+	else
+		err = fastrpc_remote_heap_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
 	if (err)
 		return err;