diff options
| author | Christian König <christian.koenig@amd.com> | 2022-03-02 18:26:53 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-09-20 19:40:32 +0300 |
| commit | 68ce8b242242651eb3cb4ff29b79c44d02f752c9 (patch) | |
| tree | 2405418f61d1a63f04f8502d8c85df90e3b32b03 /drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | |
| parent | c05d789fed948ed6a45963ae0d5d79c67b87aebf (diff) | |
| download | linux-68ce8b242242651eb3cb4ff29b79c44d02f752c9.tar.xz | |
drm/amdgpu: add gang submit backend v2
Allows submitting jobs as gang which needs to run on multiple
engines at the same time.
Basic idea is that we have a global gang submit fence representing when the
gang leader is finally pushed to run on the hardware last.
Jobs submitted as gang are never re-submitted in case of a GPU reset since this
won't work and will just deadlock the hardware immediately again.
v2: fix logic inversion, improve documentation, fix rcu
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_job.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c index 877b3c22a8a8..cfbe19cfe9af 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c @@ -173,11 +173,29 @@ static void amdgpu_job_free_cb(struct drm_sched_job *s_job) dma_fence_put(&job->hw_fence); } +void amdgpu_job_set_gang_leader(struct amdgpu_job *job, + struct amdgpu_job *leader) +{ + struct dma_fence *fence = &leader->base.s_fence->scheduled; + + WARN_ON(job->gang_submit); + + /* + * Don't add a reference when we are the gang leader to avoid circle + * dependency. + */ + if (job != leader) + dma_fence_get(fence); + job->gang_submit = fence; +} + void amdgpu_job_free(struct amdgpu_job *job) { amdgpu_job_free_resources(job); amdgpu_sync_free(&job->sync); amdgpu_sync_free(&job->sched_sync); + if (job->gang_submit != &job->base.s_fence->scheduled) + dma_fence_put(job->gang_submit); if (!job->hw_fence.ops) kfree(job); @@ -247,12 +265,16 @@ static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job, fence = amdgpu_sync_get_fence(&job->sync); } + if (!fence && job->gang_submit) + fence = amdgpu_device_switch_gang(ring->adev, job->gang_submit); + return fence; } static struct dma_fence *amdgpu_job_run(struct drm_sched_job *sched_job) { struct amdgpu_ring *ring = to_amdgpu_ring(sched_job->sched); + struct amdgpu_device *adev = ring->adev; struct dma_fence *fence = NULL, *finished; struct amdgpu_job *job; int r = 0; @@ -264,8 +286,10 @@ static struct dma_fence *amdgpu_job_run(struct drm_sched_job *sched_job) trace_amdgpu_sched_run_job(job); - if (job->vram_lost_counter != atomic_read(&ring->adev->vram_lost_counter)) - dma_fence_set_error(finished, -ECANCELED);/* skip IB as well if VRAM lost */ + /* Skip job if VRAM is lost and never resubmit gangs */ + if (job->vram_lost_counter != atomic_read(&adev->vram_lost_counter) || + (job->job_run_counter && job->gang_submit)) + dma_fence_set_error(finished, -ECANCELED); if (finished->error < 0) { DRM_INFO("Skip scheduling IBs!\n"); |