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[v4,2/2] misc: fastrpc: use coherent pool for untranslated Compute Banks

Message ID 20230511141146.30465-3-me@dylanvanassche.be
State Accepted
Commit ba2174057252b296ed73fdfa60235a9e20e807ce
Headers show
Series misc: fastrpc: FastRPC reserved memory assignment for SDM845 SLPI | expand

Commit Message

Dylan Van Assche May 11, 2023, 2:11 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>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
---
 drivers/misc/fastrpc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 1ced553ae959..3d47d3d13b5d 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;