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authorChristian König <christian.koenig@amd.com>2016-06-01 10:47:36 +0200
committerAlex Deucher <alexander.deucher@amd.com>2016-07-07 14:51:23 -0400
commit1fbb2e929902ab6e161ebcfb2f4d6de1c4613473 (patch)
tree12738147113fb6731365826c1bd5e80d1cdf4079 /drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
parent8d76001e0058aca129f599810d4f60e36fb36c5b (diff)
downloadlwn-1fbb2e929902ab6e161ebcfb2f4d6de1c4613473.tar.gz
lwn-1fbb2e929902ab6e161ebcfb2f4d6de1c4613473.zip
drm/amdgpu: use a fence array for VMID management
Just wait for any fence to become available, instead of waiting for the last entry of the LRU. Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com> Acked-by: Chunming Zhou <david1.zhou@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c155
1 files changed, 97 insertions, 58 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index f38978d8834c..06eb60950cef 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -25,6 +25,7 @@
* Alex Deucher
* Jerome Glisse
*/
+#include <linux/fence-array.h>
#include <drm/drmP.h>
#include <drm/amdgpu_drm.h>
#include "amdgpu.h"
@@ -180,82 +181,116 @@ int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
struct amdgpu_device *adev = ring->adev;
struct fence *updates = sync->last_vm_update;
struct amdgpu_vm_id *id, *idle;
- unsigned i = ring->idx;
- int r;
+ struct fence **fences;
+ unsigned i;
+ int r = 0;
+
+ fences = kmalloc_array(sizeof(void *), adev->vm_manager.num_ids,
+ GFP_KERNEL);
+ if (!fences)
+ return -ENOMEM;
mutex_lock(&adev->vm_manager.lock);
/* Check if we have an idle VMID */
+ i = 0;
list_for_each_entry(idle, &adev->vm_manager.ids_lru, list) {
- if (amdgpu_sync_is_idle(&idle->active, ring))
+ fences[i] = amdgpu_sync_peek_fence(&idle->active, ring);
+ if (!fences[i])
break;
-
+ ++i;
}
- /* If we can't find a idle VMID to use, just wait for the oldest */
+ /* If we can't find a idle VMID to use, wait till one becomes available */
if (&idle->list == &adev->vm_manager.ids_lru) {
- id = list_first_entry(&adev->vm_manager.ids_lru,
- struct amdgpu_vm_id,
- list);
- } else {
- /* Check if we can use a VMID already assigned to this VM */
- do {
- struct fence *flushed;
-
- id = vm->ids[i++];
- if (i == AMDGPU_MAX_RINGS)
- i = 0;
-
- /* Check all the prerequisites to using this VMID */
- if (!id)
- continue;
-
- if (atomic64_read(&id->owner) != vm->client_id)
- continue;
-
- if (pd_addr != id->pd_gpu_addr)
- continue;
-
- if (id->last_user != ring && (!id->last_flush ||
- !fence_is_signaled(id->last_flush)))
- continue;
-
- flushed = id->flushed_updates;
- if (updates && (!flushed ||
- fence_is_later(updates, flushed)))
- continue;
-
- /* Good we can use this VMID */
- if (id->last_user == ring) {
- r = amdgpu_sync_fence(ring->adev, sync,
- id->first);
- if (r)
- goto error;
- }
+ u64 fence_context = adev->vm_manager.fence_context + ring->idx;
+ unsigned seqno = ++adev->vm_manager.seqno[ring->idx];
+ struct fence_array *array;
+ unsigned j;
+
+ for (j = 0; j < i; ++j)
+ fence_get(fences[j]);
+
+ array = fence_array_create(i, fences, fence_context,
+ seqno, true);
+ if (!array) {
+ for (j = 0; j < i; ++j)
+ fence_put(fences[j]);
+ kfree(fences);
+ r = -ENOMEM;
+ goto error;
+ }
+
+
+ r = amdgpu_sync_fence(ring->adev, sync, &array->base);
+ fence_put(&array->base);
+ if (r)
+ goto error;
+
+ mutex_unlock(&adev->vm_manager.lock);
+ return 0;
+
+ }
+ kfree(fences);
+
+ /* Check if we can use a VMID already assigned to this VM */
+ i = ring->idx;
+ do {
+ struct fence *flushed;
+
+ id = vm->ids[i++];
+ if (i == AMDGPU_MAX_RINGS)
+ i = 0;
- /* And remember this submission as user of the VMID */
- r = amdgpu_sync_fence(ring->adev, &id->active, fence);
+ /* Check all the prerequisites to using this VMID */
+ if (!id)
+ continue;
+
+ if (atomic64_read(&id->owner) != vm->client_id)
+ continue;
+
+ if (pd_addr != id->pd_gpu_addr)
+ continue;
+
+ if (id->last_user != ring &&
+ (!id->last_flush || !fence_is_signaled(id->last_flush)))
+ continue;
+
+ flushed = id->flushed_updates;
+ if (updates &&
+ (!flushed || fence_is_later(updates, flushed)))
+ continue;
+
+ /* Good we can use this VMID */
+ if (id->last_user == ring) {
+ r = amdgpu_sync_fence(ring->adev, sync,
+ id->first);
if (r)
goto error;
+ }
+
+ /* And remember this submission as user of the VMID */
+ r = amdgpu_sync_fence(ring->adev, &id->active, fence);
+ if (r)
+ goto error;
- list_move_tail(&id->list, &adev->vm_manager.ids_lru);
- vm->ids[ring->idx] = id;
+ list_move_tail(&id->list, &adev->vm_manager.ids_lru);
+ vm->ids[ring->idx] = id;
- *vm_id = id - adev->vm_manager.ids;
- *vm_pd_addr = AMDGPU_VM_NO_FLUSH;
- trace_amdgpu_vm_grab_id(vm, ring->idx, *vm_id,
- *vm_pd_addr);
+ *vm_id = id - adev->vm_manager.ids;
+ *vm_pd_addr = AMDGPU_VM_NO_FLUSH;
+ trace_amdgpu_vm_grab_id(vm, ring->idx, *vm_id, *vm_pd_addr);
- mutex_unlock(&adev->vm_manager.lock);
- return 0;
+ mutex_unlock(&adev->vm_manager.lock);
+ return 0;
- } while (i != ring->idx);
+ } while (i != ring->idx);
- /* Still no ID to use? Then use the idle one found earlier */
- id = idle;
- }
+ /* Still no ID to use? Then use the idle one found earlier */
+ id = idle;
- r = amdgpu_sync_cycle_fences(sync, &id->active, fence);
+ /* Remember this submission as user of the VMID */
+ r = amdgpu_sync_fence(ring->adev, &id->active, fence);
if (r)
goto error;
@@ -1515,6 +1550,10 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev)
&adev->vm_manager.ids_lru);
}
+ adev->vm_manager.fence_context = fence_context_alloc(AMDGPU_MAX_RINGS);
+ for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
+ adev->vm_manager.seqno[i] = 0;
+
atomic_set(&adev->vm_manager.vm_pte_next_ring, 0);
atomic64_set(&adev->vm_manager.client_counter, 0);
}