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drm/radeon: cleanup the fence ring locking code 

We no longer need to take the ring lock while checking for
a gpu lockup, so just cleanup the code.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2014-02-18 15:58:31 +01:00
parent aee4aa73a1
commit 37615527c5
6 changed files with 25 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/radeon/radeon.h
View File

@ -363,9 +363,8 @@ int radeon_fence_emit(struct radeon_device *rdev, struct radeon_fence **fence, i
void radeon_fence_process(struct radeon_device *rdev, int ring);
bool radeon_fence_signaled(struct radeon_fence *fence);
int radeon_fence_wait(struct radeon_fence *fence, bool interruptible);
int radeon_fence_wait_locked(struct radeon_fence *fence);
int radeon_fence_wait_next_locked(struct radeon_device *rdev, int ring);
int radeon_fence_wait_empty_locked(struct radeon_device *rdev, int ring);
int radeon_fence_wait_next(struct radeon_device *rdev, int ring);
int radeon_fence_wait_empty(struct radeon_device *rdev, int ring);
int radeon_fence_wait_any(struct radeon_device *rdev,
struct radeon_fence **fences,
bool intr);

4
drivers/gpu/drm/radeon/radeon_device.c
View File

@ -1445,10 +1445,9 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend, bool fbcon)
/* evict vram memory */
radeon_bo_evict_vram(rdev);
mutex_lock(&rdev->ring_lock);
/* wait for gpu to finish processing current batch */
for (i = 0; i < RADEON_NUM_RINGS; i++) {
r = radeon_fence_wait_empty_locked(rdev, i);
r = radeon_fence_wait_empty(rdev, i);
if (r) {
/* delay GPU reset to resume */
force_completion = true;
@ -1457,7 +1456,6 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend, bool fbcon)
if (force_completion) {
radeon_fence_driver_force_completion(rdev);
}
mutex_unlock(&rdev->ring_lock);
radeon_save_bios_scratch_regs(rdev);

59
drivers/gpu/drm/radeon/radeon_fence.c
View File

@ -288,7 +288,6 @@ static bool radeon_fence_any_seq_signaled(struct radeon_device *rdev, u64 *seq)
* @rdev: radeon device pointer
* @target_seq: sequence number(s) we want to wait for
* @intr: use interruptable sleep
* @lock_ring: whether the ring should be locked or not
*
* Wait for the requested sequence number(s) to be written by any ring
* (all asics). Sequnce number array is indexed by ring id.
@ -299,7 +298,7 @@ static bool radeon_fence_any_seq_signaled(struct radeon_device *rdev, u64 *seq)
* -EDEADLK is returned when a GPU lockup has been detected.
*/
static int radeon_fence_wait_seq(struct radeon_device *rdev, u64 *target_seq,
bool intr, bool lock_ring)
bool intr)
{
uint64_t last_seq[RADEON_NUM_RINGS];
bool signaled;
@ -358,9 +357,6 @@ static int radeon_fence_wait_seq(struct radeon_device *rdev, u64 *target_seq,
if (i != RADEON_NUM_RINGS)
continue;
if (lock_ring)
mutex_lock(&rdev->ring_lock);
for (i = 0; i < RADEON_NUM_RINGS; ++i) {
if (!target_seq[i])
continue;
@ -378,14 +374,9 @@ static int radeon_fence_wait_seq(struct radeon_device *rdev, u64 *target_seq,
/* remember that we need an reset */
rdev->needs_reset = true;
if (lock_ring)
mutex_unlock(&rdev->ring_lock);
wake_up_all(&rdev->fence_queue);
return -EDEADLK;
}
if (lock_ring)
mutex_unlock(&rdev->ring_lock);
}
}
return 0;
@ -416,7 +407,7 @@ int radeon_fence_wait(struct radeon_fence *fence, bool intr)
if (seq[fence->ring] == RADEON_FENCE_SIGNALED_SEQ)
return 0;
r = radeon_fence_wait_seq(fence->rdev, seq, intr, true);
r = radeon_fence_wait_seq(fence->rdev, seq, intr);
if (r)
return r;
@ -464,7 +455,7 @@ int radeon_fence_wait_any(struct radeon_device *rdev,
if (num_rings == 0)
return -ENOENT;
r = radeon_fence_wait_seq(rdev, seq, intr, true);
r = radeon_fence_wait_seq(rdev, seq, intr);
if (r) {
return r;
}
@ -472,37 +463,7 @@ int radeon_fence_wait_any(struct radeon_device *rdev,
}
/**
* radeon_fence_wait_locked - wait for a fence to signal
*
* @fence: radeon fence object
*
* Wait for the requested fence to signal (all asics).
* Returns 0 if the fence has passed, error for all other cases.
*/
int radeon_fence_wait_locked(struct radeon_fence *fence)
{
uint64_t seq[RADEON_NUM_RINGS] = {};
int r;
if (fence == NULL) {
WARN(1, "Querying an invalid fence : %p !\n", fence);
return -EINVAL;
}
seq[fence->ring] = fence->seq;
if (seq[fence->ring] == RADEON_FENCE_SIGNALED_SEQ)
return 0;
r = radeon_fence_wait_seq(fence->rdev, seq, false, false);
if (r)
return r;
fence->seq = RADEON_FENCE_SIGNALED_SEQ;
return 0;
}
/**
* radeon_fence_wait_next_locked - wait for the next fence to signal
* radeon_fence_wait_next - wait for the next fence to signal
*
* @rdev: radeon device pointer
* @ring: ring index the fence is associated with
@ -511,7 +472,7 @@ int radeon_fence_wait_locked(struct radeon_fence *fence)
* Returns 0 if the next fence has passed, error for all other cases.
* Caller must hold ring lock.
*/
int radeon_fence_wait_next_locked(struct radeon_device *rdev, int ring)
int radeon_fence_wait_next(struct radeon_device *rdev, int ring)
{
uint64_t seq[RADEON_NUM_RINGS] = {};
@ -521,11 +482,11 @@ int radeon_fence_wait_next_locked(struct radeon_device *rdev, int ring)
already the last emited fence */
return -ENOENT;
}
return radeon_fence_wait_seq(rdev, seq, false, false);
return radeon_fence_wait_seq(rdev, seq, false);
}
/**
* radeon_fence_wait_empty_locked - wait for all fences to signal
* radeon_fence_wait_empty - wait for all fences to signal
*
* @rdev: radeon device pointer
* @ring: ring index the fence is associated with
@ -534,7 +495,7 @@ int radeon_fence_wait_next_locked(struct radeon_device *rdev, int ring)
* Returns 0 if the fences have passed, error for all other cases.
* Caller must hold ring lock.
*/
int radeon_fence_wait_empty_locked(struct radeon_device *rdev, int ring)
int radeon_fence_wait_empty(struct radeon_device *rdev, int ring)
{
uint64_t seq[RADEON_NUM_RINGS] = {};
int r;
@ -543,7 +504,7 @@ int radeon_fence_wait_empty_locked(struct radeon_device *rdev, int ring)
if (!seq[ring])
return 0;
r = radeon_fence_wait_seq(rdev, seq, false, false);
r = radeon_fence_wait_seq(rdev, seq, false);
if (r) {
if (r == -EDEADLK)
return -EDEADLK;
@ -794,7 +755,7 @@ void radeon_fence_driver_fini(struct radeon_device *rdev)
for (ring = 0; ring < RADEON_NUM_RINGS; ring++) {
if (!rdev->fence_drv[ring].initialized)
continue;
r = radeon_fence_wait_empty_locked(rdev, ring);
r = radeon_fence_wait_empty(rdev, ring);
if (r) {
/* no need to trigger GPU reset as we are unloading */
radeon_fence_driver_force_completion(rdev);

4
drivers/gpu/drm/radeon/radeon_pm.c
View File

@ -260,7 +260,7 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev)
if (!ring->ready) {
continue;
}
r = radeon_fence_wait_empty_locked(rdev, i);
r = radeon_fence_wait_empty(rdev, i);
if (r) {
/* needs a GPU reset dont reset here */
mutex_unlock(&rdev->ring_lock);
@ -896,7 +896,7 @@ force:
for (i = 0; i < RADEON_NUM_RINGS; i++) {
struct radeon_ring *ring = &rdev->ring[i];
if (ring->ready)
radeon_fence_wait_empty_locked(rdev, i);
radeon_fence_wait_empty(rdev, i);
}
/* program the new power state */

2
drivers/gpu/drm/radeon/radeon_ring.c
View File

@ -382,7 +382,7 @@ int radeon_ring_alloc(struct radeon_device *rdev, struct radeon_ring *ring, unsi
if (ndw < ring->ring_free_dw) {
break;
}
r = radeon_fence_wait_next_locked(rdev, ring->idx);
r = radeon_fence_wait_next(rdev, ring->idx);
if (r)
return r;
}

12
drivers/gpu/drm/radeon/radeon_semaphore.c
View File

@ -147,7 +147,9 @@ int radeon_semaphore_sync_rings(struct radeon_device *rdev,
if (++count > RADEON_NUM_SYNCS) {
/* not enough room, wait manually */
radeon_fence_wait_locked(fence);
r = radeon_fence_wait(fence, false);
if (r)
return r;
continue;
}
@ -161,7 +163,9 @@ int radeon_semaphore_sync_rings(struct radeon_device *rdev,
if (!radeon_semaphore_emit_signal(rdev, i, semaphore)) {
/* signaling wasn't successful wait manually */
radeon_ring_undo(&rdev->ring[i]);
radeon_fence_wait_locked(fence);
r = radeon_fence_wait(fence, false);
if (r)
return r;
continue;
}
@ -169,7 +173,9 @@ int radeon_semaphore_sync_rings(struct radeon_device *rdev,
if (!radeon_semaphore_emit_wait(rdev, ring, semaphore)) {
/* waiting wasn't successful wait manually */
radeon_ring_undo(&rdev->ring[i]);
radeon_fence_wait_locked(fence);
r = radeon_fence_wait(fence, false);
if (r)
return r;
continue;
}