linux-kernel - [PATCH v2 10/20] drm/admgpu: handle resv dependencies in amdgpu_ttm_map

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Message-ID: <20251113160632.5889-11-pierre-eric.pelloux-prayer@amd.com>
Date: Thu, 13 Nov 2025 17:05:51 +0100
From: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
To: Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>, David Airlie
	<airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Sumit Semwal
	<sumit.semwal@...aro.org>
CC: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>,
	<amd-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
	<linaro-mm-sig@...ts.linaro.org>
Subject: [PATCH v2 10/20] drm/admgpu: handle resv dependencies in amdgpu_ttm_map_buffer

If a resv object is passed, its fences are treated as a dependency
for the amdgpu_ttm_map_buffer operation.

This will be used by amdgpu_bo_release_notify through
amdgpu_fill_buffer.

Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index b13f0993dbf1..411997db70eb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -184,7 +184,8 @@ static int amdgpu_ttm_map_buffer(struct drm_sched_entity *entity,
 				 struct amdgpu_res_cursor *mm_cur,
 				 unsigned int window, struct amdgpu_ring *ring,
 				 bool tmz, uint64_t *size, uint64_t *addr,
-				 struct dma_fence *dep)
+				 struct dma_fence *dep,
+				 struct dma_resv *resv)
 {
 	struct amdgpu_device *adev = ring->adev;
 	unsigned int offset, num_pages, num_dw, num_bytes;
@@ -239,6 +240,10 @@ static int amdgpu_ttm_map_buffer(struct drm_sched_entity *entity,
 	if (dep)
 		drm_sched_job_add_dependency(&job->base, dma_fence_get(dep));
 
+	if (resv)
+		drm_sched_job_add_resv_dependencies(&job->base, resv,
+						    DMA_RESV_USAGE_BOOKKEEP);
+
 	src_addr = num_dw * 4;
 	src_addr += job->ibs[0].gpu_addr;
 
@@ -332,14 +337,14 @@ static int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
 		r = amdgpu_ttm_map_buffer(&entity->base,
 					  src->bo, src->mem, &src_mm,
 					  entity->gart_window_id0, ring, tmz, &cur_size, &from,
-					  NULL);
+					  NULL, NULL);
 		if (r)
 			goto error;
 
 		r = amdgpu_ttm_map_buffer(&entity->base,
 					  dst->bo, dst->mem, &dst_mm,
 					  entity->gart_window_id1, ring, tmz, &cur_size, &to,
-					  NULL);
+					  NULL, NULL);
 		if (r)
 			goto error;
 
@@ -2451,7 +2456,7 @@ int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
 		r = amdgpu_ttm_map_buffer(&entity->base,
 					  &bo->tbo, bo->tbo.resource, &cursor,
 					  entity->gart_window_id1, ring, false, &size, &addr,
-					  NULL);
+					  NULL, NULL);
 		if (r)
 			goto err;
 
@@ -2506,7 +2511,8 @@ int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity *entity,
 					  &bo->tbo, bo->tbo.resource, &dst,
 					  entity->gart_window_id1, ring, false,
 					  &cur_size, &to,
-					  dependency);
+					  dependency,
+					  resv);
 		if (r)
 			goto error;
 
-- 
2.43.0