This patch modifies the user queue management to use preempt/restore
operations instead of full map/unmap for queue eviction scenarios where
applicable. The changes include:
1. Introduces new helper functions:
- amdgpu_userqueue_preempt_helper()
- amdgpu_userqueue_restore_helper()
2. Updates queue state management to track PREEMPTED state
3. Modifies eviction handling to use preempt instead of unmap:
- amdgpu_userq_evict_all() now uses preempt_helper
- amdgpu_userq_restore_all() now uses restore_helper
The preempt/restore approach provides better performance during queue
eviction by avoiding the overhead of full queue teardown and setup.
Full map/unmap operations are still used for initial setup/teardown
and system suspend scenarios.
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Jesse Zhang <jesse.zh...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c | 49 +++++++++++++++++++++--
1 file changed, 46 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
index aac0de86f3e8..decedf8057ac 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
@@ -45,7 +45,7 @@ u32 amdgpu_userq_get_supported_ip_mask(struct amdgpu_device
*adev)
}
static int
-amdgpu_userq_unmap_helper(struct amdgpu_userq_mgr *uq_mgr,
+amdgpu_userqueue_preempt_helper(struct amdgpu_userq_mgr *uq_mgr,
struct amdgpu_usermode_queue *queue)
{
struct amdgpu_device *adev = uq_mgr->adev;
@@ -54,6 +54,49 @@ amdgpu_userq_unmap_helper(struct amdgpu_userq_mgr *uq_mgr,
int r = 0;
if (queue->state == AMDGPU_USERQ_STATE_MAPPED) {
+ r = userq_funcs->preempt(uq_mgr, queue);
+ if (r) {
+ queue->state = AMDGPU_USERQ_STATE_HUNG;
+ } else {
+ queue->state = AMDGPU_USERQ_STATE_PREEMPTED;
+ }
+ }
+
+ return r;
+}
+
+static int
+amdgpu_userqueue_restore_helper(struct amdgpu_userq_mgr *uq_mgr,
+ struct amdgpu_usermode_queue *queue)
+{
+ struct amdgpu_device *adev = uq_mgr->adev;
+ const struct amdgpu_userq_funcs *userq_funcs =
+ adev->userq_funcs[queue->queue_type];
+ int r = 0;
+
+ if (queue->state == AMDGPU_USERQ_STATE_PREEMPTED) {
+ r = userq_funcs->restore(uq_mgr, queue);
+ if (r) {
+ queue->state = AMDGPU_USERQ_STATE_HUNG;
+ } else {
+ queue->state = AMDGPU_USERQ_STATE_MAPPED;
+ }
+ }
+
+ return r;
+}
+
+static int
+amdgpu_userq_unmap_helper(struct amdgpu_userq_mgr *uq_mgr,
+ struct amdgpu_usermode_queue *queue)
+{
+ struct amdgpu_device *adev = uq_mgr->adev;
+ const struct amdgpu_userq_funcs *userq_funcs =
+ adev->userq_funcs[queue->queue_type];
+ int r = 0;
+
+ if ((queue->state == AMDGPU_USERQ_STATE_MAPPED) ||
+ (queue->state == AMDGPU_USERQ_STATE_PREEMPTED)) {
r = userq_funcs->unmap(uq_mgr, queue);
if (r)
queue->state = AMDGPU_USERQ_STATE_HUNG;
@@ -536,7 +579,7 @@ amdgpu_userq_restore_all(struct amdgpu_userq_mgr *uq_mgr)
/* Resume all the queues for this process */
idr_for_each_entry(&uq_mgr->userq_idr, queue, queue_id) {
- r = amdgpu_userq_map_helper(uq_mgr, queue);
+ r = amdgpu_userqueue_restore_helper(uq_mgr, queue);
if (r)
ret = r;
}
@@ -693,7 +736,7 @@ amdgpu_userq_evict_all(struct amdgpu_userq_mgr *uq_mgr)
/* Try to unmap all the queues in this process ctx */
idr_for_each_entry(&uq_mgr->userq_idr, queue, queue_id) {
- r = amdgpu_userq_unmap_helper(uq_mgr, queue);
+ r = amdgpu_userqueue_preempt_helper(uq_mgr, queue);
if (r)
ret = r;
}
--
2.49.0
