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authorBoris Brezillon <boris.brezillon@collabora.com>2021-06-30 09:27:37 +0300
committerBoris Brezillon <boris.brezillon@collabora.com>2021-07-01 09:53:25 +0300
commit78efe21b6f8e6f4d39fceaf0cc5c534c11f9dd60 (patch)
tree52456ca7d9e03737afb1d1d77a29fed2db167c7a /drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
parent1fad1b7ed1ebfcfb5a1d0d21b0c47f7af5f49a6c (diff)
downloadlinux-78efe21b6f8e6f4d39fceaf0cc5c534c11f9dd60.tar.xz
drm/sched: Allow using a dedicated workqueue for the timeout/fault tdr
Mali Midgard/Bifrost GPUs have 3 hardware queues but only a global GPU reset. This leads to extra complexity when we need to synchronize timeout works with the reset work. One solution to address that is to have an ordered workqueue at the driver level that will be used by the different schedulers to queue their timeout work. Thanks to the serialization provided by the ordered workqueue we are guaranteed that timeout handlers are executed sequentially, and can thus easily reset the GPU from the timeout handler without extra synchronization. v5: * Add a new paragraph to the timedout_job() method v3: * New patch v4: * Actually use the timeout_wq to queue the timeout work Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Reviewed-by: Steven Price <steven.price@arm.com> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Christian König <christian.koenig@amd.com> Cc: Qiang Yu <yuq825@gmail.com> Cc: Emma Anholt <emma@anholt.net> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: "Christian König" <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210630062751.2832545-3-boris.brezillon@collabora.com
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
index 72d9b92b1754..d4547d195173 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
@@ -490,7 +490,7 @@ int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring,
r = drm_sched_init(&ring->sched, &amdgpu_sched_ops,
num_hw_submission, amdgpu_job_hang_limit,
- timeout, sched_score, ring->name);
+ timeout, NULL, sched_score, ring->name);
if (r) {
DRM_ERROR("Failed to create scheduler on ring %s.\n",
ring->name);