}
} while (atomic64_xchg(&rdev->fence_drv[ring].last_seq, seq) > seq);
- if (wake) {
- rdev->fence_drv[ring].last_activity = jiffies;
+ if (wake)
wake_up_all(&rdev->fence_queue);
- }
}
/**
}
/**
- * radeon_fence_seq_signaled - check if a fence sequeuce number has signaled
+ * radeon_fence_seq_signaled - check if a fence sequence number has signaled
*
* @rdev: radeon device pointer
* @seq: sequence number
* @ring: ring index the fence is associated with
*
- * Check if the last singled fence sequnce number is >= the requested
+ * Check if the last signaled fence sequnce number is >= the requested
* sequence number (all asics).
* Returns true if the fence has signaled (current fence value
* is >= requested value) or false if it has not (current fence
}
/**
- * radeon_fence_wait_seq - wait for a specific sequence number
+ * radeon_fence_any_seq_signaled - check if any sequence number is signaled
*
* @rdev: radeon device pointer
- * @target_seq: sequence number we want to wait for
- * @ring: ring index the fence is associated with
+ * @seq: sequence numbers
+ *
+ * Check if the last signaled fence sequnce number is >= the requested
+ * sequence number (all asics).
+ * Returns true if any has signaled (current value is >= requested value)
+ * or false if it has not. Helper function for radeon_fence_wait_seq.
+ */
+static bool radeon_fence_any_seq_signaled(struct radeon_device *rdev, u64 *seq)
+{
+ unsigned i;
+
+ for (i = 0; i < RADEON_NUM_RINGS; ++i) {
+ if (seq[i] && radeon_fence_seq_signaled(rdev, seq[i], i))
+ return true;
+ }
+ return false;
+}
+
+/**
+ * radeon_fence_wait_seq - wait for a specific sequence numbers
+ *
+ * @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 to be written (all asics).
+ * Wait for the requested sequence number(s) to be written by any ring
+ * (all asics). Sequnce number array is indexed by ring id.
* @intr selects whether to use interruptable (true) or non-interruptable
* (false) sleep when waiting for the sequence number. Helper function
- * for radeon_fence_wait(), et al.
+ * for radeon_fence_wait_*().
* Returns 0 if the sequence number has passed, error for all other cases.
- * -EDEADLK is returned when a GPU lockup has been detected and the ring is
- * marked as not ready so no further jobs get scheduled until a successful
- * reset.
+ * -EDEADLK is returned when a GPU lockup has been detected.
*/
-static int radeon_fence_wait_seq(struct radeon_device *rdev, u64 target_seq,
- unsigned ring, bool intr, bool lock_ring)
+static int radeon_fence_wait_seq(struct radeon_device *rdev, u64 *target_seq,
+ bool intr, bool lock_ring)
{
- unsigned long timeout, last_activity;
- uint64_t seq;
- unsigned i;
+ uint64_t last_seq[RADEON_NUM_RINGS];
bool signaled;
- int r;
+ int i, r;
+
+ while (!radeon_fence_any_seq_signaled(rdev, target_seq)) {
+
+ /* Save current sequence values, used to check for GPU lockups */
+ for (i = 0; i < RADEON_NUM_RINGS; ++i) {
+ if (!target_seq[i])
+ continue;
- while (target_seq > atomic64_read(&rdev->fence_drv[ring].last_seq)) {
- if (!rdev->ring[ring].ready) {
- return -EBUSY;
+ last_seq[i] = atomic64_read(&rdev->fence_drv[i].last_seq);
+ trace_radeon_fence_wait_begin(rdev->ddev, target_seq[i]);
+ radeon_irq_kms_sw_irq_get(rdev, i);
}
- timeout = jiffies - RADEON_FENCE_JIFFIES_TIMEOUT;
- if (time_after(rdev->fence_drv[ring].last_activity, timeout)) {
- /* the normal case, timeout is somewhere before last_activity */
- timeout = rdev->fence_drv[ring].last_activity - timeout;
+ if (intr) {
+ r = wait_event_interruptible_timeout(rdev->fence_queue, (
+ (signaled = radeon_fence_any_seq_signaled(rdev, target_seq))
+ || rdev->needs_reset), RADEON_FENCE_JIFFIES_TIMEOUT);
} else {
- /* either jiffies wrapped around, or no fence was signaled in the last 500ms
- * anyway we will just wait for the minimum amount and then check for a lockup
- */
- timeout = 1;
+ r = wait_event_timeout(rdev->fence_queue, (
+ (signaled = radeon_fence_any_seq_signaled(rdev, target_seq))
+ || rdev->needs_reset), RADEON_FENCE_JIFFIES_TIMEOUT);
}
- seq = atomic64_read(&rdev->fence_drv[ring].last_seq);
- /* Save current last activity valuee, used to check for GPU lockups */
- last_activity = rdev->fence_drv[ring].last_activity;
- trace_radeon_fence_wait_begin(rdev->ddev, seq);
- radeon_irq_kms_sw_irq_get(rdev, ring);
- if (intr) {
- r = wait_event_interruptible_timeout(rdev->fence_queue,
- (signaled = radeon_fence_seq_signaled(rdev, target_seq, ring)),
- timeout);
- } else {
- r = wait_event_timeout(rdev->fence_queue,
- (signaled = radeon_fence_seq_signaled(rdev, target_seq, ring)),
- timeout);
+ for (i = 0; i < RADEON_NUM_RINGS; ++i) {
+ if (!target_seq[i])
+ continue;
+
+ radeon_irq_kms_sw_irq_put(rdev, i);
+ trace_radeon_fence_wait_end(rdev->ddev, target_seq[i]);
}
- radeon_irq_kms_sw_irq_put(rdev, ring);
- if (unlikely(r < 0)) {
+
+ if (unlikely(r < 0))
return r;
- }
- trace_radeon_fence_wait_end(rdev->ddev, seq);
if (unlikely(!signaled)) {
+ if (rdev->needs_reset)
+ return -EDEADLK;
+
/* we were interrupted for some reason and fence
* isn't signaled yet, resume waiting */
- if (r) {
+ if (r)
continue;
+
+ for (i = 0; i < RADEON_NUM_RINGS; ++i) {
+ if (!target_seq[i])
+ continue;
+
+ if (last_seq[i] != atomic64_read(&rdev->fence_drv[i].last_seq))
+ break;
}
- /* check if sequence value has changed since last_activity */
- if (seq != atomic64_read(&rdev->fence_drv[ring].last_seq)) {
+ if (i != RADEON_NUM_RINGS)
continue;
- }
- if (lock_ring) {
+ if (lock_ring)
mutex_lock(&rdev->ring_lock);
- }
- /* test if somebody else has already decided that this is a lockup */
- if (last_activity != rdev->fence_drv[ring].last_activity) {
- if (lock_ring) {
- mutex_unlock(&rdev->ring_lock);
- }
- continue;
+ for (i = 0; i < RADEON_NUM_RINGS; ++i) {
+ if (!target_seq[i])
+ continue;
+
+ if (radeon_ring_is_lockup(rdev, i, &rdev->ring[i]))
+ break;
}
- if (radeon_ring_is_lockup(rdev, ring, &rdev->ring[ring])) {
+ if (i < RADEON_NUM_RINGS) {
/* good news we believe it's a lockup */
- dev_warn(rdev->dev, "GPU lockup (waiting for 0x%016llx last fence id 0x%016llx)\n",
- target_seq, seq);
-
- /* change last activity so nobody else think there is a lockup */
- for (i = 0; i < RADEON_NUM_RINGS; ++i) {
- rdev->fence_drv[i].last_activity = jiffies;
- }
-
- /* mark the ring as not ready any more */
- rdev->ring[ring].ready = false;
- if (lock_ring) {
+ dev_warn(rdev->dev, "GPU lockup (waiting for "
+ "0x%016llx last fence id 0x%016llx on"
+ " ring %d)\n",
+ target_seq[i], last_seq[i], i);
+
+ /* 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) {
+ if (lock_ring)
mutex_unlock(&rdev->ring_lock);
- }
}
}
return 0;
*/
int radeon_fence_wait(struct radeon_fence *fence, bool intr)
{
+ uint64_t seq[RADEON_NUM_RINGS] = {};
int r;
if (fence == NULL) {
return -EINVAL;
}
- r = radeon_fence_wait_seq(fence->rdev, fence->seq,
- fence->ring, intr, true);
- if (r) {
- return r;
- }
- fence->seq = RADEON_FENCE_SIGNALED_SEQ;
- return 0;
-}
-
-static bool radeon_fence_any_seq_signaled(struct radeon_device *rdev, u64 *seq)
-{
- unsigned i;
-
- for (i = 0; i < RADEON_NUM_RINGS; ++i) {
- if (seq[i] && radeon_fence_seq_signaled(rdev, seq[i], i)) {
- return true;
- }
- }
- return false;
-}
-
-/**
- * radeon_fence_wait_any_seq - wait for a sequence number on any ring
- *
- * @rdev: radeon device pointer
- * @target_seq: sequence number(s) we want to wait for
- * @intr: use interruptable sleep
- *
- * Wait for the requested sequence number(s) to be written by any ring
- * (all asics). Sequnce number array is indexed by ring id.
- * @intr selects whether to use interruptable (true) or non-interruptable
- * (false) sleep when waiting for the sequence number. Helper function
- * for radeon_fence_wait_any(), et al.
- * Returns 0 if the sequence number has passed, error for all other cases.
- */
-static int radeon_fence_wait_any_seq(struct radeon_device *rdev,
- u64 *target_seq, bool intr)
-{
- unsigned long timeout, last_activity, tmp;
- unsigned i, ring = RADEON_NUM_RINGS;
- bool signaled;
- int r;
-
- for (i = 0, last_activity = 0; i < RADEON_NUM_RINGS; ++i) {
- if (!target_seq[i]) {
- continue;
- }
-
- /* use the most recent one as indicator */
- if (time_after(rdev->fence_drv[i].last_activity, last_activity)) {
- last_activity = rdev->fence_drv[i].last_activity;
- }
-
- /* For lockup detection just pick the lowest ring we are
- * actively waiting for
- */
- if (i < ring) {
- ring = i;
- }
- }
-
- /* nothing to wait for ? */
- if (ring == RADEON_NUM_RINGS) {
- return -ENOENT;
- }
-
- while (!radeon_fence_any_seq_signaled(rdev, target_seq)) {
- timeout = jiffies - RADEON_FENCE_JIFFIES_TIMEOUT;
- if (time_after(last_activity, timeout)) {
- /* the normal case, timeout is somewhere before last_activity */
- timeout = last_activity - timeout;
- } else {
- /* either jiffies wrapped around, or no fence was signaled in the last 500ms
- * anyway we will just wait for the minimum amount and then check for a lockup
- */
- timeout = 1;
- }
+ seq[fence->ring] = fence->seq;
+ if (seq[fence->ring] == RADEON_FENCE_SIGNALED_SEQ)
+ return 0;
- trace_radeon_fence_wait_begin(rdev->ddev, target_seq[ring]);
- for (i = 0; i < RADEON_NUM_RINGS; ++i) {
- if (target_seq[i]) {
- radeon_irq_kms_sw_irq_get(rdev, i);
- }
- }
- if (intr) {
- r = wait_event_interruptible_timeout(rdev->fence_queue,
- (signaled = radeon_fence_any_seq_signaled(rdev, target_seq)),
- timeout);
- } else {
- r = wait_event_timeout(rdev->fence_queue,
- (signaled = radeon_fence_any_seq_signaled(rdev, target_seq)),
- timeout);
- }
- for (i = 0; i < RADEON_NUM_RINGS; ++i) {
- if (target_seq[i]) {
- radeon_irq_kms_sw_irq_put(rdev, i);
- }
- }
- if (unlikely(r < 0)) {
- return r;
- }
- trace_radeon_fence_wait_end(rdev->ddev, target_seq[ring]);
-
- if (unlikely(!signaled)) {
- /* we were interrupted for some reason and fence
- * isn't signaled yet, resume waiting */
- if (r) {
- continue;
- }
-
- mutex_lock(&rdev->ring_lock);
- for (i = 0, tmp = 0; i < RADEON_NUM_RINGS; ++i) {
- if (time_after(rdev->fence_drv[i].last_activity, tmp)) {
- tmp = rdev->fence_drv[i].last_activity;
- }
- }
- /* test if somebody else has already decided that this is a lockup */
- if (last_activity != tmp) {
- last_activity = tmp;
- mutex_unlock(&rdev->ring_lock);
- continue;
- }
-
- if (radeon_ring_is_lockup(rdev, ring, &rdev->ring[ring])) {
- /* good news we believe it's a lockup */
- dev_warn(rdev->dev, "GPU lockup (waiting for 0x%016llx)\n",
- target_seq[ring]);
-
- /* change last activity so nobody else think there is a lockup */
- for (i = 0; i < RADEON_NUM_RINGS; ++i) {
- rdev->fence_drv[i].last_activity = jiffies;
- }
+ r = radeon_fence_wait_seq(fence->rdev, seq, intr, true);
+ if (r)
+ return r;
- /* mark the ring as not ready any more */
- rdev->ring[ring].ready = false;
- mutex_unlock(&rdev->ring_lock);
- return -EDEADLK;
- }
- mutex_unlock(&rdev->ring_lock);
- }
- }
+ fence->seq = RADEON_FENCE_SIGNALED_SEQ;
return 0;
}
bool intr)
{
uint64_t seq[RADEON_NUM_RINGS];
- unsigned i;
+ unsigned i, num_rings = 0;
int r;
for (i = 0; i < RADEON_NUM_RINGS; ++i) {
continue;
}
- if (fences[i]->seq == RADEON_FENCE_SIGNALED_SEQ) {
- /* something was allready signaled */
- return 0;
- }
-
seq[i] = fences[i]->seq;
+ ++num_rings;
+
+ /* test if something was allready signaled */
+ if (seq[i] == RADEON_FENCE_SIGNALED_SEQ)
+ return 0;
}
- r = radeon_fence_wait_any_seq(rdev, seq, intr);
+ /* nothing to wait for ? */
+ if (num_rings == 0)
+ return -ENOENT;
+
+ r = radeon_fence_wait_seq(rdev, seq, intr, true);
if (r) {
return r;
}
*/
int radeon_fence_wait_next_locked(struct radeon_device *rdev, int ring)
{
- uint64_t seq;
+ uint64_t seq[RADEON_NUM_RINGS] = {};
- seq = atomic64_read(&rdev->fence_drv[ring].last_seq) + 1ULL;
- if (seq >= rdev->fence_drv[ring].sync_seq[ring]) {
+ seq[ring] = atomic64_read(&rdev->fence_drv[ring].last_seq) + 1ULL;
+ if (seq[ring] >= rdev->fence_drv[ring].sync_seq[ring]) {
/* nothing to wait for, last_seq is
already the last emited fence */
return -ENOENT;
}
- return radeon_fence_wait_seq(rdev, seq, ring, false, false);
+ return radeon_fence_wait_seq(rdev, seq, false, false);
}
/**
*/
int radeon_fence_wait_empty_locked(struct radeon_device *rdev, int ring)
{
- uint64_t seq = rdev->fence_drv[ring].sync_seq[ring];
+ uint64_t seq[RADEON_NUM_RINGS] = {};
int r;
- r = radeon_fence_wait_seq(rdev, seq, ring, false, false);
+ seq[ring] = rdev->fence_drv[ring].sync_seq[ring];
+ r = radeon_fence_wait_seq(rdev, seq, false, false);
if (r) {
- if (r == -EDEADLK) {
+ if (r == -EDEADLK)
return -EDEADLK;
- }
+
dev_err(rdev->dev, "error waiting for ring[%d] to become idle (%d)\n",
ring, r);
}
for (i = 0; i < RADEON_NUM_RINGS; ++i)
rdev->fence_drv[ring].sync_seq[i] = 0;
atomic64_set(&rdev->fence_drv[ring].last_seq, 0);
- rdev->fence_drv[ring].last_activity = jiffies;
rdev->fence_drv[ring].initialized = false;
}
projects / ~andy / linux / commitdiff