Am 09.09.24 um 22:06 schrieb Shashank Sharma:
This patch adds support for userqueue resume. What it typically does is
this:
- adds a new delayed work for resuming all the queues.
- schedules this delayed work from the suspend work.
- validates the BOs and replaces the eviction fence before resuming all
the queues running under this instance of userq manager.
V2: Addressed Christian's review comments:
- declare local variables like ret at the bottom.
- lock all the object first, then start attaching the new fence.
- dont replace old eviction fence, just attach new eviction fence.
- no error logs for drm_exec_lock failures
- no need to reserve bos after drm_exec_locked
- schedule the resume worker immediately (not after 100 ms)
- check for NULL BO (Arvind)
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxx>
Signed-off-by: Arvind Yadav <arvind.yadav@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c | 120 ++++++++++++++++++
.../gpu/drm/amd/include/amdgpu_userqueue.h | 1 +
2 files changed, 121 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
index 979174f80993..e7f7354e0c0e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
@@ -405,6 +405,122 @@ int amdgpu_userq_ioctl(struct drm_device *dev, void *data,
return r;
}
+static int
+amdgpu_userqueue_resume_all(struct amdgpu_userq_mgr *uq_mgr)
+{
+ struct amdgpu_device *adev = uq_mgr->adev;
+ const struct amdgpu_userq_funcs *userq_funcs;
+ struct amdgpu_usermode_queue *queue;
+ int queue_id, ret;
+
+ userq_funcs = adev->userq_funcs[AMDGPU_HW_IP_GFX];
+
+ /* Resume all the queues for this process */
+ idr_for_each_entry(&uq_mgr->userq_idr, queue, queue_id) {
+ ret = userq_funcs->resume(uq_mgr, queue);
+ if (ret)
+ DRM_ERROR("Failed to resume queue %d\n", queue_id);
+ }
+
+ return ret;
+}
+
+static int
+amdgpu_userqueue_validate_bos(struct amdgpu_userq_mgr *uq_mgr)
+{
+ struct amdgpu_fpriv *fpriv = uq_mgr_to_fpriv(uq_mgr);
+ struct amdgpu_vm *vm = &fpriv->vm;
+ struct amdgpu_bo_va *bo_va, *tmp;
+ struct drm_exec exec;
+ struct amdgpu_bo *bo;
+ int ret;
+
+ drm_exec_init(&exec, DRM_EXEC_IGNORE_DUPLICATES, 0);
+ drm_exec_until_all_locked(&exec) {
+ ret = amdgpu_vm_lock_pd(vm, &exec, 2);
+ drm_exec_retry_on_contention(&exec);
+ if (unlikely(ret)) {
+ DRM_ERROR("Failed to lock PD\n");
I would drop those error messages in the low level function.
The most likely cause (except for contention) why locking a BO fails is
because we were interrupted, and for that we actually don't want to
print anything.
Apart from that I really need to wrap my head around the VM code once
more, but that here should probably work for now.
Regards,
Christian.
+ goto unlock_all;
+ }
+
+ /* Lock the done list */
+ list_for_each_entry_safe(bo_va, tmp, &vm->done, base.vm_status) {
+ bo = bo_va->base.bo;
+ if (!bo)
+ continue;
+
+ ret = drm_exec_lock_obj(&exec, &bo->tbo.base);
+ drm_exec_retry_on_contention(&exec);
+ if (unlikely(ret))
+ goto unlock_all;
+ }
+
+ /* Lock the invalidated list */
+ list_for_each_entry_safe(bo_va, tmp, &vm->invalidated, base.vm_status) {
+ bo = bo_va->base.bo;
+ if (!bo)
+ continue;
+
+ ret = drm_exec_lock_obj(&exec, &bo->tbo.base);
+ drm_exec_retry_on_contention(&exec);
+ if (unlikely(ret))
+ goto unlock_all;
+ }
+ }
+
+ /* Now validate BOs */
+ list_for_each_entry_safe(bo_va, tmp, &vm->invalidated, base.vm_status) {
+ bo = bo_va->base.bo;
+ if (!bo)
+ continue;
+
+ ret = amdgpu_userqueue_validate_vm_bo(NULL, bo);
+ if (ret) {
+ DRM_ERROR("Failed to validate BO\n");
+ goto unlock_all;
+ }
+ }
+
+ /* Handle the moved BOs */
+ ret = amdgpu_vm_handle_moved(uq_mgr->adev, vm, &exec.ticket);
+ if (ret) {
+ DRM_ERROR("Failed to handle moved BOs\n");
+ goto unlock_all;
+ }
+
+ ret = amdgpu_eviction_fence_replace_fence(fpriv);
+ if (ret)
+ DRM_ERROR("Failed to replace eviction fence\n");
+
+unlock_all:
+ drm_exec_fini(&exec);
+ return ret;
+}
+
+static void amdgpu_userqueue_resume_worker(struct work_struct *work)
+{
+ struct amdgpu_userq_mgr *uq_mgr = work_to_uq_mgr(work, resume_work.work);
+ int ret;
+
+ mutex_lock(&uq_mgr->userq_mutex);
+
+ ret = amdgpu_userqueue_validate_bos(uq_mgr);
+ if (ret) {
+ DRM_ERROR("Failed to validate BOs to restore\n");
+ goto unlock;
+ }
+
+ ret = amdgpu_userqueue_resume_all(uq_mgr);
+ if (ret) {
+ DRM_ERROR("Failed to resume all queues\n");
+ goto unlock;
+ }
+
+unlock:
+ mutex_unlock(&uq_mgr->userq_mutex);
+}
+
static int
amdgpu_userqueue_suspend_all(struct amdgpu_userq_mgr *uq_mgr)
{
@@ -486,6 +602,9 @@ amdgpu_userqueue_suspend_worker(struct work_struct *work)
/* Cleanup old eviction fence entry */
amdgpu_eviction_fence_destroy(evf_mgr);
+ /* Schedule a work to restore userqueue */
+ schedule_delayed_work(&uq_mgr->resume_work, 0);
+
unlock:
mutex_unlock(&uq_mgr->userq_mutex);
}
@@ -508,6 +627,7 @@ int amdgpu_userq_mgr_init(struct amdgpu_userq_mgr *userq_mgr, struct amdgpu_devi
/* This reference is required for suspend work */
fpriv->evf_mgr.ev_fence->uq_mgr = userq_mgr;
INIT_DELAYED_WORK(&userq_mgr->suspend_work, amdgpu_userqueue_suspend_worker);
+ INIT_DELAYED_WORK(&userq_mgr->resume_work, amdgpu_userqueue_resume_worker);
return 0;
}
diff --git a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
index 8b3b50fa8b5b..d035b5c2b14b 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
@@ -76,6 +76,7 @@ struct amdgpu_userq_mgr {
struct amdgpu_device *adev;
struct delayed_work suspend_work;
+ struct delayed_work resume_work;
int num_userqs;
};
