dev-amdgpu: Fix SDMA trap ring ID, context
SDMA traps are used in the driver as a DMA fence. To pass a fence, the
SDMA sends the driver the interrupt context from a trap packet and the
ring ID which specifies which queue in the SDMA engine is passing a
fence. Currently the interrupt context is using the wrong value in the
packet and the ring ID is hard-coded to always be the gfx queue.
This changeset uses the correct interrupt context from the SDMA packet
and sets the ring ID to either 0 if the gfx queue is currently being
processed or 3 if the page queue is being processed.
The relevant interrupt service routine in the driver can be found at:
https://github.com/RadeonOpenCompute/ROCK-Kernel-Driver/blob/roc-4.3.x/
drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c#L2129
Change-Id: Ie4a4a9d6ab1d3bf83bf76bb57a02a91100217b51
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65093
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/src/dev/amdgpu/sdma_engine.cc b/src/dev/amdgpu/sdma_engine.cc
index 1cd6ff2..e9a4c17 100644
--- a/src/dev/amdgpu/sdma_engine.cc
+++ b/src/dev/amdgpu/sdma_engine.cc
@@ -713,11 +713,16 @@
{
q->incRptr(sizeof(sdmaTrap));
- DPRINTF(SDMAEngine, "Trap contextId: %p rbRptr: %p ibOffset: %p\n",
- pkt->contextId, pkt->rbRptr, pkt->ibOffset);
+ DPRINTF(SDMAEngine, "Trap contextId: %p\n", pkt->intrContext);
- gpuDevice->getIH()->prepareInterruptCookie(pkt->contextId, 0,
- getIHClientId(), TRAP_ID);
+ uint32_t ring_id = 0;
+ assert(page.processing() ^ gfx.processing());
+ if (page.processing()) {
+ ring_id = 3;
+ }
+
+ gpuDevice->getIH()->prepareInterruptCookie(pkt->intrContext, ring_id,
+ getIHClientId(), TRAP_ID);
gpuDevice->getIH()->submitInterruptCookie();
delete pkt;
