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path: root/drivers/gpu/drm/radeon/radeon_fence.c
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Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_fence.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_fence.c107
1 files changed, 59 insertions, 48 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index d90f95b405c5..b1f9a81b5d1d 100644
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -58,7 +58,6 @@ int radeon_fence_emit(struct radeon_device *rdev, struct radeon_fence *fence)
radeon_fence_ring_emit(rdev, fence);
fence->emited = true;
- fence->timeout = jiffies + ((2000 * HZ) / 1000);
list_del(&fence->list);
list_add_tail(&fence->list, &rdev->fence_drv.emited);
write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
@@ -71,15 +70,34 @@ static bool radeon_fence_poll_locked(struct radeon_device *rdev)
struct list_head *i, *n;
uint32_t seq;
bool wake = false;
+ unsigned long cjiffies;
- if (rdev == NULL) {
- return true;
- }
- if (rdev->shutdown) {
- return true;
- }
seq = RREG32(rdev->fence_drv.scratch_reg);
- rdev->fence_drv.last_seq = seq;
+ if (seq != rdev->fence_drv.last_seq) {
+ rdev->fence_drv.last_seq = seq;
+ rdev->fence_drv.last_jiffies = jiffies;
+ rdev->fence_drv.last_timeout = RADEON_FENCE_JIFFIES_TIMEOUT;
+ } else {
+ cjiffies = jiffies;
+ if (time_after(cjiffies, rdev->fence_drv.last_jiffies)) {
+ cjiffies -= rdev->fence_drv.last_jiffies;
+ if (time_after(rdev->fence_drv.last_timeout, cjiffies)) {
+ /* update the timeout */
+ rdev->fence_drv.last_timeout -= cjiffies;
+ } else {
+ /* the 500ms timeout is elapsed we should test
+ * for GPU lockup
+ */
+ rdev->fence_drv.last_timeout = 1;
+ }
+ } else {
+ /* wrap around update last jiffies, we will just wait
+ * a little longer
+ */
+ rdev->fence_drv.last_jiffies = cjiffies;
+ }
+ return false;
+ }
n = NULL;
list_for_each(i, &rdev->fence_drv.emited) {
fence = list_entry(i, struct radeon_fence, list);
@@ -171,9 +189,8 @@ bool radeon_fence_signaled(struct radeon_fence *fence)
int radeon_fence_wait(struct radeon_fence *fence, bool intr)
{
struct radeon_device *rdev;
- unsigned long cur_jiffies;
- unsigned long timeout;
- bool expired = false;
+ unsigned long irq_flags, timeout;
+ u32 seq;
int r;
if (fence == NULL) {
@@ -184,21 +201,18 @@ int radeon_fence_wait(struct radeon_fence *fence, bool intr)
if (radeon_fence_signaled(fence)) {
return 0;
}
-
+ timeout = rdev->fence_drv.last_timeout;
retry:
- cur_jiffies = jiffies;
- timeout = HZ / 100;
- if (time_after(fence->timeout, cur_jiffies)) {
- timeout = fence->timeout - cur_jiffies;
- }
-
+ /* save current sequence used to check for GPU lockup */
+ seq = rdev->fence_drv.last_seq;
if (intr) {
radeon_irq_kms_sw_irq_get(rdev);
r = wait_event_interruptible_timeout(rdev->fence_drv.queue,
radeon_fence_signaled(fence), timeout);
radeon_irq_kms_sw_irq_put(rdev);
- if (unlikely(r < 0))
+ if (unlikely(r < 0)) {
return r;
+ }
} else {
radeon_irq_kms_sw_irq_get(rdev);
r = wait_event_timeout(rdev->fence_drv.queue,
@@ -206,38 +220,36 @@ retry:
radeon_irq_kms_sw_irq_put(rdev);
}
if (unlikely(!radeon_fence_signaled(fence))) {
- if (unlikely(r == 0)) {
- expired = true;
+ /* we were interrupted for some reason and fence isn't
+ * isn't signaled yet, resume wait
+ */
+ if (r) {
+ timeout = r;
+ goto retry;
}
- if (unlikely(expired)) {
- timeout = 1;
- if (time_after(cur_jiffies, fence->timeout)) {
- timeout = cur_jiffies - fence->timeout;
- }
- timeout = jiffies_to_msecs(timeout);
- if (timeout > 500) {
- DRM_ERROR("fence(%p:0x%08X) %lums timeout "
- "going to reset GPU\n",
- fence, fence->seq, timeout);
- radeon_gpu_reset(rdev);
- WREG32(rdev->fence_drv.scratch_reg, fence->seq);
- }
+ /* don't protect read access to rdev->fence_drv.last_seq
+ * if we experiencing a lockup the value doesn't change
+ */
+ if (seq == rdev->fence_drv.last_seq && radeon_gpu_is_lockup(rdev)) {
+ /* good news we believe it's a lockup */
+ WARN(1, "GPU lockup (waiting for 0x%08X last fence id 0x%08X)\n", fence->seq, seq);
+ /* FIXME: what should we do ? marking everyone
+ * as signaled for now
+ */
+ rdev->gpu_lockup = true;
+ r = radeon_gpu_reset(rdev);
+ if (r)
+ return r;
+ WREG32(rdev->fence_drv.scratch_reg, fence->seq);
+ rdev->gpu_lockup = false;
}
+ timeout = RADEON_FENCE_JIFFIES_TIMEOUT;
+ write_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
+ rdev->fence_drv.last_timeout = RADEON_FENCE_JIFFIES_TIMEOUT;
+ rdev->fence_drv.last_jiffies = jiffies;
+ write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
goto retry;
}
- if (unlikely(expired)) {
- rdev->fence_drv.count_timeout++;
- cur_jiffies = jiffies;
- timeout = 1;
- if (time_after(cur_jiffies, fence->timeout)) {
- timeout = cur_jiffies - fence->timeout;
- }
- timeout = jiffies_to_msecs(timeout);
- DRM_ERROR("fence(%p:0x%08X) %lums timeout\n",
- fence, fence->seq, timeout);
- DRM_ERROR("last signaled fence(0x%08X)\n",
- rdev->fence_drv.last_seq);
- }
return 0;
}
@@ -333,7 +345,6 @@ int radeon_fence_driver_init(struct radeon_device *rdev)
INIT_LIST_HEAD(&rdev->fence_drv.created);
INIT_LIST_HEAD(&rdev->fence_drv.emited);
INIT_LIST_HEAD(&rdev->fence_drv.signaled);
- rdev->fence_drv.count_timeout = 0;
init_waitqueue_head(&rdev->fence_drv.queue);
rdev->fence_drv.initialized = true;
write_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);