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drm/amdgpu: update the PASID mapping only on demand 

Updating the PASID is rather heavyweight and shouldn't be done all the
time.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-02-05 17:38:01 +01:00 committed by Alex Deucher
parent c633c00bf0
commit b3cd285fa6
3 changed files with 32 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
View File

@ -607,6 +607,7 @@ void amdgpu_vmid_mgr_fini(struct amdgpu_device *adev)
amdgpu_sync_free(&id->active);
dma_fence_put(id->flushed_updates);
dma_fence_put(id->last_flush);
dma_fence_put(id->pasid_mapping);
}
}
}

3
drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
View File

@ -57,6 +57,9 @@ struct amdgpu_vmid {
uint32_t gws_size;
uint32_t oa_base;
uint32_t oa_size;
unsigned pasid;
struct dma_fence *pasid_mapping;
};
struct amdgpu_vmid_mgr {

37
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View File

@ -591,14 +591,24 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_
id->oa_base != job->oa_base ||
id->oa_size != job->oa_size);
bool vm_flush_needed = job->vm_needs_flush;
bool pasid_mapping_needed = id->pasid != job->pasid ||
!id->pasid_mapping ||
!dma_fence_is_signaled(id->pasid_mapping);
struct dma_fence *fence = NULL;
unsigned patch_offset = 0;
int r;
if (amdgpu_vmid_had_gpu_reset(adev, id)) {
gds_switch_needed = true;
vm_flush_needed = true;
pasid_mapping_needed = true;
}
gds_switch_needed &= !!ring->funcs->emit_gds_switch;
vm_flush_needed &= !!ring->funcs->emit_vm_flush;
pasid_mapping_needed &= adev->gmc.gmc_funcs->emit_pasid_mapping &&
ring->funcs->emit_wreg;
if (!vm_flush_needed && !gds_switch_needed && !need_pipe_sync)
return 0;
@ -608,27 +618,36 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_
if (need_pipe_sync)
amdgpu_ring_emit_pipeline_sync(ring);
if (ring->funcs->emit_vm_flush && vm_flush_needed) {
struct dma_fence *fence;
if (vm_flush_needed) {
trace_amdgpu_vm_flush(ring, job->vmid, job->vm_pd_addr);
amdgpu_ring_emit_vm_flush(ring, job->vmid, job->vm_pd_addr);
if (adev->gmc.gmc_funcs->emit_pasid_mapping &&
ring->funcs->emit_wreg)
amdgpu_gmc_emit_pasid_mapping(ring, job->vmid,
job->pasid);
}
if (pasid_mapping_needed)
amdgpu_gmc_emit_pasid_mapping(ring, job->vmid, job->pasid);
if (vm_flush_needed || pasid_mapping_needed) {
r = amdgpu_fence_emit(ring, &fence);
if (r)
return r;
}
if (vm_flush_needed) {
mutex_lock(&id_mgr->lock);
dma_fence_put(id->last_flush);
id->last_flush = fence;
id->current_gpu_reset_count = atomic_read(&adev->gpu_reset_counter);
id->last_flush = dma_fence_get(fence);
id->current_gpu_reset_count =
atomic_read(&adev->gpu_reset_counter);
mutex_unlock(&id_mgr->lock);
}
if (pasid_mapping_needed) {
id->pasid = job->pasid;
dma_fence_put(id->pasid_mapping);
id->pasid_mapping = dma_fence_get(fence);
}
dma_fence_put(fence);
if (ring->funcs->emit_gds_switch && gds_switch_needed) {
id->gds_base = job->gds_base;
id->gds_size = job->gds_size;