This makes it possible to wait for a specific amount of time, rather than wait until infinity.
Signed-off-by: Maarten Lankhorst maarten.lankhorst@canonical.com Reviewed-by: Christian König deathsimple@vodafone.de --- drivers/gpu/drm/radeon/radeon_fence.c | 50 ++++++++++++++++++++------------- 1 file changed, 30 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c index c055acc3a271..f79e0b34582b 100644 --- a/drivers/gpu/drm/radeon/radeon_fence.c +++ b/drivers/gpu/drm/radeon/radeon_fence.c @@ -318,22 +318,25 @@ static bool radeon_fence_any_seq_signaled(struct radeon_device *rdev, u64 *seq) }
/** - * radeon_fence_wait_seq - wait for a specific sequence numbers + * radeon_fence_wait_seq_timeout - wait for a specific sequence numbers * * @rdev: radeon device pointer * @target_seq: sequence number(s) we want to wait for * @intr: use interruptable sleep + * @timeout: maximum time to wait, or MAX_SCHEDULE_TIMEOUT for infinite wait * * 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_*(). - * Returns 0 if the sequence number has passed, error for all other cases. + * Returns remaining time if the sequence number has passed, 0 when + * the wait timeout, or an error for all other cases. * -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) +static long radeon_fence_wait_seq_timeout(struct radeon_device *rdev, + u64 *target_seq, bool intr, + long timeout) { uint64_t last_seq[RADEON_NUM_RINGS]; bool signaled; @@ -355,11 +358,11 @@ static int radeon_fence_wait_seq(struct radeon_device *rdev, u64 *target_seq, if (intr) { r = wait_event_interruptible_timeout(rdev->fence_queue, ( (signaled = radeon_fence_any_seq_signaled(rdev, target_seq)) - || rdev->needs_reset), MAX_SCHEDULE_TIMEOUT); + || rdev->needs_reset), timeout); } else { r = wait_event_timeout(rdev->fence_queue, ( (signaled = radeon_fence_any_seq_signaled(rdev, target_seq)) - || rdev->needs_reset), MAX_SCHEDULE_TIMEOUT); + || rdev->needs_reset), timeout); }
for (i = 0; i < RADEON_NUM_RINGS; ++i) { @@ -370,20 +373,22 @@ static int radeon_fence_wait_seq(struct radeon_device *rdev, u64 *target_seq, trace_radeon_fence_wait_end(rdev->ddev, i, target_seq[i]); }
- if (r < 0) + if (r <= 0) return r;
if (rdev->needs_reset) return -EDEADLK; + + timeout = r; } - return 0; + return timeout; }
/** * radeon_fence_wait - wait for a fence to signal * * @fence: radeon fence object - * @intr: use interruptable sleep + * @intr: use interruptible sleep * * Wait for the requested fence to signal (all asics). * @intr selects whether to use interruptable (true) or non-interruptable @@ -393,7 +398,7 @@ static int radeon_fence_wait_seq(struct radeon_device *rdev, u64 *target_seq, int radeon_fence_wait(struct radeon_fence *fence, bool intr) { uint64_t seq[RADEON_NUM_RINGS] = {}; - int r; + long r;
if (fence == NULL) { WARN(1, "Querying an invalid fence : %p !\n", fence); @@ -404,9 +409,10 @@ 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); - if (r) + r = radeon_fence_wait_seq_timeout(fence->rdev, seq, intr, MAX_SCHEDULE_TIMEOUT); + if (r < 0) { return r; + }
fence->seq = RADEON_FENCE_SIGNALED_SEQ; return 0; @@ -431,7 +437,7 @@ int radeon_fence_wait_any(struct radeon_device *rdev, { uint64_t seq[RADEON_NUM_RINGS]; unsigned i, num_rings = 0; - int r; + long r;
for (i = 0; i < RADEON_NUM_RINGS; ++i) { seq[i] = 0; @@ -452,8 +458,8 @@ int radeon_fence_wait_any(struct radeon_device *rdev, if (num_rings == 0) return -ENOENT;
- r = radeon_fence_wait_seq(rdev, seq, intr); - if (r) { + r = radeon_fence_wait_seq_timeout(rdev, seq, intr, MAX_SCHEDULE_TIMEOUT); + if (r < 0) { return r; } return 0; @@ -472,6 +478,7 @@ int radeon_fence_wait_any(struct radeon_device *rdev, int radeon_fence_wait_next(struct radeon_device *rdev, int ring) { uint64_t seq[RADEON_NUM_RINGS] = {}; + long r;
seq[ring] = atomic64_read(&rdev->fence_drv[ring].last_seq) + 1ULL; if (seq[ring] >= rdev->fence_drv[ring].sync_seq[ring]) { @@ -479,7 +486,10 @@ int radeon_fence_wait_next(struct radeon_device *rdev, int ring) already the last emited fence */ return -ENOENT; } - return radeon_fence_wait_seq(rdev, seq, false); + r = radeon_fence_wait_seq_timeout(rdev, seq, false, MAX_SCHEDULE_TIMEOUT); + if (r < 0) + return r; + return 0; }
/** @@ -495,18 +505,18 @@ int radeon_fence_wait_next(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; + long r;
seq[ring] = rdev->fence_drv[ring].sync_seq[ring]; if (!seq[ring]) return 0;
- r = radeon_fence_wait_seq(rdev, seq, false); - if (r) { + r = radeon_fence_wait_seq_timeout(rdev, seq, false, MAX_SCHEDULE_TIMEOUT); + if (r < 0) { if (r == -EDEADLK) return -EDEADLK;
- dev_err(rdev->dev, "error waiting for ring[%d] to become idle (%d)\n", + dev_err(rdev->dev, "error waiting for ring[%d] to become idle (%ld)\n", ring, r); } return 0;