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drm/amdgpu: move reusing VMIDs into separate function 

Let's try this once more.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-01-31 13:35:25 +01:00 committed by Alex Deucher
parent cb5372ace9
commit 25ddf75bb3
1 changed files with 89 additions and 57 deletions
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146
drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
View File

@ -320,6 +320,79 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
return 0;
}
/**
* amdgpu_vm_grab_used - try to reuse a VMID
*
* @vm: vm to allocate id for
* @ring: ring we want to submit job to
* @sync: sync object where we add dependencies
* @fence: fence protecting ID from reuse
* @job: job who wants to use the VMID
* @id: resulting VMID
*
* Try to reuse a VMID for this submission.
*/
static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
struct amdgpu_ring *ring,
struct amdgpu_sync *sync,
struct dma_fence *fence,
struct amdgpu_job *job,
struct amdgpu_vmid **id)
{
struct amdgpu_device *adev = ring->adev;
unsigned vmhub = ring->funcs->vmhub;
struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
uint64_t fence_context = adev->fence_context + ring->idx;
struct dma_fence *updates = sync->last_vm_update;
int r;
job->vm_needs_flush = vm->use_cpu_for_update;
/* Check if we can use a VMID already assigned to this VM */
list_for_each_entry_reverse((*id), &id_mgr->ids_lru, list) {
bool needs_flush = vm->use_cpu_for_update;
struct dma_fence *flushed;
/* Check all the prerequisites to using this VMID */
if ((*id)->owner != vm->entity.fence_context)
continue;
if ((*id)->pd_gpu_addr != job->vm_pd_addr)
continue;
if (!(*id)->last_flush ||
((*id)->last_flush->context != fence_context &&
!dma_fence_is_signaled((*id)->last_flush)))
needs_flush = true;
flushed = (*id)->flushed_updates;
if (updates && (!flushed || dma_fence_is_later(updates, flushed)))
needs_flush = true;
/* Concurrent flushes are only possible starting with Vega10 */
if (adev->asic_type < CHIP_VEGA10 && needs_flush)
continue;
/* Good, we can use this VMID. Remember this submission as
* user of the VMID.
*/
r = amdgpu_sync_fence(ring->adev, &(*id)->active, fence, false);
if (r)
return r;
if (updates && (!flushed || dma_fence_is_later(updates, flushed))) {
dma_fence_put((*id)->flushed_updates);
(*id)->flushed_updates = dma_fence_get(updates);
}
job->vm_needs_flush |= needs_flush;
return 0;
}
*id = NULL;
return 0;
}
/**
* amdgpu_vm_grab_id - allocate the next free VMID
*
@ -338,7 +411,6 @@ int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
struct amdgpu_device *adev = ring->adev;
unsigned vmhub = ring->funcs->vmhub;
struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
uint64_t fence_context = adev->fence_context + ring->idx;
struct dma_fence *updates = sync->last_vm_update;
struct amdgpu_vmid *id, *idle;
int r = 0;
@ -354,70 +426,30 @@ int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
return r;
}
job->vm_needs_flush = vm->use_cpu_for_update;
/* Check if we can use a VMID already assigned to this VM */
list_for_each_entry_reverse(id, &id_mgr->ids_lru, list) {
struct dma_fence *flushed;
bool needs_flush = vm->use_cpu_for_update;
r = amdgpu_vmid_grab_used(vm, ring, sync, fence, job, &id);
if (r)
goto error;
/* Check all the prerequisites to using this VMID */
if (id->owner != vm->entity.fence_context)
continue;
if (!id) {
/* Still no ID to use? Then use the idle one found earlier */
id = idle;
if (job->vm_pd_addr != id->pd_gpu_addr)
continue;
if (!id->last_flush ||
(id->last_flush->context != fence_context &&
!dma_fence_is_signaled(id->last_flush)))
needs_flush = true;
flushed = id->flushed_updates;
if (updates && (!flushed || dma_fence_is_later(updates, flushed)))
needs_flush = true;
/* Concurrent flushes are only possible starting with Vega10 */
if (adev->asic_type < CHIP_VEGA10 && needs_flush)
continue;
/* Good we can use this VMID. Remember this submission as
* user of the VMID.
*/
/* Remember this submission as user of the VMID */
r = amdgpu_sync_fence(ring->adev, &id->active, fence, false);
if (r)
goto error;
if (updates && (!flushed || dma_fence_is_later(updates, flushed))) {
dma_fence_put(id->flushed_updates);
id->flushed_updates = dma_fence_get(updates);
}
if (needs_flush)
goto needs_flush;
else
goto no_flush_needed;
id->pd_gpu_addr = job->vm_pd_addr;
dma_fence_put(id->flushed_updates);
id->flushed_updates = dma_fence_get(updates);
id->owner = vm->entity.fence_context;
job->vm_needs_flush = true;
}
/* Still no ID to use? Then use the idle one found earlier */
id = idle;
/* Remember this submission as user of the VMID */
r = amdgpu_sync_fence(ring->adev, &id->active, fence, false);
if (r)
goto error;
id->pd_gpu_addr = job->vm_pd_addr;
dma_fence_put(id->flushed_updates);
id->flushed_updates = dma_fence_get(updates);
id->owner = vm->entity.fence_context;
needs_flush:
job->vm_needs_flush = true;
dma_fence_put(id->last_flush);
id->last_flush = NULL;
no_flush_needed:
if (job->vm_needs_flush) {
dma_fence_put(id->last_flush);
id->last_flush = NULL;
}
list_move_tail(&id->list, &id_mgr->ids_lru);
job->vmid = id - id_mgr->ids;