bool debug_exp_resets;
bool debug_disable_gpu_ring_reset;
- bool enforce_isolation[MAX_XCP];
- /* Added this mutex for cleaner shader isolation between GFX and compute processes */
+ /* Protection for the following isolation structure */
struct mutex enforce_isolation_mutex;
+ bool enforce_isolation[MAX_XCP];
+ struct amdgpu_isolation {
+ void *owner;
+ struct dma_fence *spearhead;
+ struct amdgpu_sync active;
+ struct amdgpu_sync prev;
+ } isolation[MAX_XCP];
struct amdgpu_init_level *init_lvl;
struct dma_fence *amdgpu_device_get_gang(struct amdgpu_device *adev);
struct dma_fence *amdgpu_device_switch_gang(struct amdgpu_device *adev,
struct dma_fence *gang);
+struct dma_fence *amdgpu_device_enforce_isolation(struct amdgpu_device *adev,
+ struct amdgpu_ring *ring,
+ struct amdgpu_job *job);
bool amdgpu_device_has_display_hardware(struct amdgpu_device *adev);
ssize_t amdgpu_get_soft_full_reset_mask(struct amdgpu_ring *ring);
ssize_t amdgpu_show_reset_mask(char *buf, uint32_t supported_reset);
mutex_init(&adev->gfx.reset_sem_mutex);
/* Initialize the mutex for cleaner shader isolation between GFX and compute processes */
mutex_init(&adev->enforce_isolation_mutex);
+ for (i = 0; i < MAX_XCP; ++i) {
+ adev->isolation[i].spearhead = dma_fence_get_stub();
+ amdgpu_sync_create(&adev->isolation[i].active);
+ amdgpu_sync_create(&adev->isolation[i].prev);
+ }
mutex_init(&adev->gfx.kfd_sch_mutex);
mutex_init(&adev->gfx.workload_profile_mutex);
mutex_init(&adev->vcn.workload_profile_mutex);
void amdgpu_device_fini_sw(struct amdgpu_device *adev)
{
- int idx;
+ int i, idx;
bool px;
amdgpu_device_ip_fini(adev);
amdgpu_ucode_release(&adev->firmware.gpu_info_fw);
adev->accel_working = false;
dma_fence_put(rcu_dereference_protected(adev->gang_submit, true));
+ for (i = 0; i < MAX_XCP; ++i) {
+ dma_fence_put(adev->isolation[i].spearhead);
+ amdgpu_sync_free(&adev->isolation[i].active);
+ amdgpu_sync_free(&adev->isolation[i].prev);
+ }
amdgpu_reset_fini(adev);
return NULL;
}
+/**
+ * amdgpu_device_enforce_isolation - enforce HW isolation
+ * @adev: the amdgpu device pointer
+ * @ring: the HW ring the job is supposed to run on
+ * @job: the job which is about to be pushed to the HW ring
+ *
+ * Makes sure that only one client at a time can use the GFX block.
+ * Returns: The dependency to wait on before the job can be pushed to the HW.
+ * The function is called multiple times until NULL is returned.
+ */
+struct dma_fence *amdgpu_device_enforce_isolation(struct amdgpu_device *adev,
+ struct amdgpu_ring *ring,
+ struct amdgpu_job *job)
+{
+ struct amdgpu_isolation *isolation = &adev->isolation[ring->xcp_id];
+ struct drm_sched_fence *f = job->base.s_fence;
+ struct dma_fence *dep;
+ void *owner;
+ int r;
+
+ /*
+ * For now enforce isolation only for the GFX block since we only need
+ * the cleaner shader on those rings.
+ */
+ if (ring->funcs->type != AMDGPU_RING_TYPE_GFX &&
+ ring->funcs->type != AMDGPU_RING_TYPE_COMPUTE)
+ return NULL;
+
+ /*
+ * All submissions where enforce isolation is false are handled as if
+ * they come from a single client. Use ~0l as the owner to distinct it
+ * from kernel submissions where the owner is NULL.
+ */
+ owner = job->enforce_isolation ? f->owner : (void *)~0l;
+
+ mutex_lock(&adev->enforce_isolation_mutex);
+
+ /*
+ * The "spearhead" submission is the first one which changes the
+ * ownership to its client. We always need to wait for it to be
+ * pushed to the HW before proceeding with anything.
+ */
+ if (&f->scheduled != isolation->spearhead &&
+ !dma_fence_is_signaled(isolation->spearhead)) {
+ dep = isolation->spearhead;
+ goto out_grab_ref;
+ }
+
+ if (isolation->owner != owner) {
+
+ /*
+ * Wait for any gang to be assembled before switching to a
+ * different owner or otherwise we could deadlock the
+ * submissions.
+ */
+ if (!job->gang_submit) {
+ dep = amdgpu_device_get_gang(adev);
+ if (!dma_fence_is_signaled(dep))
+ goto out_return_dep;
+ dma_fence_put(dep);
+ }
+
+ dma_fence_put(isolation->spearhead);
+ isolation->spearhead = dma_fence_get(&f->scheduled);
+ amdgpu_sync_move(&isolation->active, &isolation->prev);
+ isolation->owner = owner;
+ }
+
+ /*
+ * Specifying the ring here helps to pipeline submissions even when
+ * isolation is enabled. If that is not desired for testing NULL can be
+ * used instead of the ring to enforce a CPU round trip while switching
+ * between clients.
+ */
+ dep = amdgpu_sync_peek_fence(&isolation->prev, ring);
+ r = amdgpu_sync_fence(&isolation->active, &f->finished, GFP_NOWAIT);
+ if (r)
+ DRM_WARN("OOM tracking isolation\n");
+
+out_grab_ref:
+ dma_fence_get(dep);
+out_return_dep:
+ mutex_unlock(&adev->enforce_isolation_mutex);
+ return dep;
+}
+
bool amdgpu_device_has_display_hardware(struct amdgpu_device *adev)
{
switch (adev->asic_type) {
(*id)->flushed_updates < updates ||
!(*id)->last_flush ||
((*id)->last_flush->context != fence_context &&
- !dma_fence_is_signaled((*id)->last_flush))) {
+ !dma_fence_is_signaled((*id)->last_flush)))
+ needs_flush = true;
+
+ if ((*id)->owner != vm->immediate.fence_context ||
+ (!adev->vm_manager.concurrent_flush && needs_flush)) {
struct dma_fence *tmp;
- /* Wait for the gang to be assembled before using a
- * reserved VMID or otherwise the gang could deadlock.
+ /* Don't use per engine and per process VMID at the
+ * same time
*/
- tmp = amdgpu_device_get_gang(adev);
- if (!dma_fence_is_signaled(tmp) && tmp != job->gang_submit) {
+ if (adev->vm_manager.concurrent_flush)
+ ring = NULL;
+
+ /* to prevent one context starved by another context */
+ (*id)->pd_gpu_addr = 0;
+ tmp = amdgpu_sync_peek_fence(&(*id)->active, ring);
+ if (tmp) {
*id = NULL;
- *fence = tmp;
+ *fence = dma_fence_get(tmp);
return 0;
}
- dma_fence_put(tmp);
-
- /* Make sure the id is owned by the gang before proceeding */
- if (!job->gang_submit ||
- (*id)->owner != vm->immediate.fence_context) {
-
- /* Don't use per engine and per process VMID at the
- * same time
- */
- if (adev->vm_manager.concurrent_flush)
- ring = NULL;
-
- /* to prevent one context starved by another context */
- (*id)->pd_gpu_addr = 0;
- tmp = amdgpu_sync_peek_fence(&(*id)->active, ring);
- if (tmp) {
- *id = NULL;
- *fence = dma_fence_get(tmp);
- return 0;
- }
- }
- needs_flush = true;
}
/* Good we can use this VMID. Remember this submission as
{
struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched);
struct amdgpu_job *job = to_amdgpu_job(sched_job);
- struct dma_fence *fence = NULL;
+ struct dma_fence *fence;
int r;
r = drm_sched_entity_error(s_entity);
if (r)
goto error;
- if (job->gang_submit)
+ if (job->gang_submit) {
fence = amdgpu_device_switch_gang(ring->adev, job->gang_submit);
+ if (fence)
+ return fence;
+ }
+
+ fence = amdgpu_device_enforce_isolation(ring->adev, ring, job);
+ if (fence)
+ return fence;
- if (!fence && job->vm && !job->vmid) {
+ if (job->vm && !job->vmid) {
r = amdgpu_vmid_grab(job->vm, ring, job, &fence);
if (r) {
dev_err(ring->adev->dev, "Error getting VM ID (%d)\n", r);
*/
if (!fence)
job->vm = NULL;
+ return fence;
}
- return fence;
+ return NULL;
error:
dma_fence_set_error(&job->base.s_fence->finished, r);
return 0;
}
+/**
+ * amdgpu_sync_move - move all fences from src to dst
+ *
+ * @src: source of the fences, empty after function
+ * @dst: destination for the fences
+ *
+ * Moves all fences from source to destination. All fences in destination are
+ * freed and source is empty after the function call.
+ */
+void amdgpu_sync_move(struct amdgpu_sync *src, struct amdgpu_sync *dst)
+{
+ unsigned int i;
+
+ amdgpu_sync_free(dst);
+
+ for (i = 0; i < HASH_SIZE(src->fences); ++i)
+ hlist_move_list(&src->fences[i], &dst->fences[i]);
+}
+
/**
* amdgpu_sync_push_to_job - push fences into job
* @sync: sync object to get the fences from
struct amdgpu_ring *ring);
struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync);
int amdgpu_sync_clone(struct amdgpu_sync *source, struct amdgpu_sync *clone);
+void amdgpu_sync_move(struct amdgpu_sync *src, struct amdgpu_sync *dst);
int amdgpu_sync_push_to_job(struct amdgpu_sync *sync, struct amdgpu_job *job);
int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr);
void amdgpu_sync_free(struct amdgpu_sync *sync);
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