50  * for GPU/CPU synchronization.  When the fence is written,
51  * it is expected that all buffers associated with that fence
59  * radeon_fence_write - write a fence value
63  * @ring: ring index the fence is associated with
65  * Writes a fence value to memory or a scratch register (all asics).
80  * radeon_fence_read - read a fence value
83  * @ring: ring index the fence is associated with
85  * Reads a fence value from memory or a scratch register (all asics).
86  * Returns the value of the fence read from memory or register.
125  * radeon_fence_emit - emit a fence on the requested ring
128  * @fence: radeon fence object
129  * @ring: ring index the fence is associated with
131  * Emits a fence command on the requested ring (all asics).
135 		      struct radeon_fence **fence,  in radeon_fence_emit()  argument
141 	*fence = kmalloc(sizeof(struct radeon_fence), GFP_KERNEL);  in radeon_fence_emit()
142 	if ((*fence) == NULL) {  in radeon_fence_emit()
145 	(*fence)->rdev = rdev;  in radeon_fence_emit()
146 	(*fence)->seq = seq = ++rdev->fence_drv[ring].sync_seq[ring];  in radeon_fence_emit()
147 	(*fence)->ring = ring;  in radeon_fence_emit()
148 	(*fence)->is_vm_update = false;  in radeon_fence_emit()
149 	dma_fence_init(&(*fence)->base, &radeon_fence_ops,  in radeon_fence_emit()
153 	radeon_fence_ring_emit(rdev, ring, *fence);  in radeon_fence_emit()
154 	trace_radeon_fence_emit(rdev->ddev, ring, (*fence)->seq);  in radeon_fence_emit()
163  * for the fence locking itself, so unlocked variants are used for
168 	struct radeon_fence *fence;  in radeon_fence_check_signaled()  local
171 	fence = container_of(wait, struct radeon_fence, fence_wake);  in radeon_fence_check_signaled()
177 	seq = atomic64_read(&fence->rdev->fence_drv[fence->ring].last_seq);  in radeon_fence_check_signaled()
178 	if (seq >= fence->seq) {  in radeon_fence_check_signaled()
179 		dma_fence_signal_locked(&fence->base);  in radeon_fence_check_signaled()
180 		radeon_irq_kms_sw_irq_put(fence->rdev, fence->ring);  in radeon_fence_check_signaled()
181 		__remove_wait_queue(&fence->rdev->fence_queue, &fence->fence_wake);  in radeon_fence_check_signaled()
182 		dma_fence_put(&fence->base);  in radeon_fence_check_signaled()
188  * radeon_fence_activity - check for fence activity
191  * @ring: ring index the fence is associated with
193  * Checks the current fence value and calculates the last
194  * signalled fence value. Returns true if activity occured
210 	 * continuously new fence signaled ie radeon_fence_read needs  in radeon_fence_activity()
238 		 * checking if a fence is signaled as it means that the  in radeon_fence_activity()
245 			 * fact that we might have set an older fence  in radeon_fence_activity()
264  * Checks for fence activity and if there is none probe
299 		dev_warn(rdev->dev, "GPU lockup (current fence id "  in radeon_fence_check_lockup()
300 			 "0x%016llx last fence id 0x%016llx on ring %d)\n",  in radeon_fence_check_lockup()
312  * radeon_fence_process - process a fence
315  * @ring: ring index the fence is associated with
317  * Checks the current fence value and wakes the fence queue
327  * radeon_fence_seq_signaled - check if a fence sequence number has signaled
331  * @ring: ring index the fence is associated with
333  * Check if the last signaled fence sequnce number is >= the requested
335  * Returns true if the fence has signaled (current fence value
336  * is >= requested value) or false if it has not (current fence
356 	struct radeon_fence *fence = to_radeon_fence(f);  in radeon_fence_is_signaled()  local
357 	struct radeon_device *rdev = fence->rdev;  in radeon_fence_is_signaled()
358 	unsigned ring = fence->ring;  in radeon_fence_is_signaled()
359 	u64 seq = fence->seq;  in radeon_fence_is_signaled()
377  * radeon_fence_enable_signaling - enable signalling on fence
378  * @f: fence
381  * to fence_queue that checks if this fence is signaled, and if so it
382  * signals the fence and removes itself.
386 	struct radeon_fence *fence = to_radeon_fence(f);  in radeon_fence_enable_signaling()  local
387 	struct radeon_device *rdev = fence->rdev;  in radeon_fence_enable_signaling()
389 	if (atomic64_read(&rdev->fence_drv[fence->ring].last_seq) >= fence->seq)  in radeon_fence_enable_signaling()
393 		radeon_irq_kms_sw_irq_get(rdev, fence->ring);  in radeon_fence_enable_signaling()
395 		if (radeon_fence_activity(rdev, fence->ring))  in radeon_fence_enable_signaling()
398 		/* did fence get signaled after we enabled the sw irq? */  in radeon_fence_enable_signaling()
399 		if (atomic64_read(&rdev->fence_drv[fence->ring].last_seq) >= fence->seq) {  in radeon_fence_enable_signaling()
400 			radeon_irq_kms_sw_irq_put(rdev, fence->ring);  in radeon_fence_enable_signaling()
408 		if (radeon_irq_kms_sw_irq_get_delayed(rdev, fence->ring))  in radeon_fence_enable_signaling()
409 			rdev->fence_drv[fence->ring].delayed_irq = true;  in radeon_fence_enable_signaling()
410 		radeon_fence_schedule_check(rdev, fence->ring);  in radeon_fence_enable_signaling()
413 	fence->fence_wake.flags = 0;  in radeon_fence_enable_signaling()
414 	fence->fence_wake.private = NULL;  in radeon_fence_enable_signaling()
415 	fence->fence_wake.func = radeon_fence_check_signaled;  in radeon_fence_enable_signaling()
416 	__add_wait_queue(&rdev->fence_queue, &fence->fence_wake);  in radeon_fence_enable_signaling()
422  * radeon_fence_signaled - check if a fence has signaled
424  * @fence: radeon fence object
426  * Check if the requested fence has signaled (all asics).
427  * Returns true if the fence has signaled or false if it has not.
429 bool radeon_fence_signaled(struct radeon_fence *fence)  in radeon_fence_signaled()  argument
431 	if (!fence)  in radeon_fence_signaled()
434 	if (radeon_fence_seq_signaled(fence->rdev, fence->seq, fence->ring)) {  in radeon_fence_signaled()
435 		dma_fence_signal(&fence->base);  in radeon_fence_signaled()
447  * Check if the last signaled fence sequnce number is >= the requested
524  * radeon_fence_wait_timeout - wait for a fence to signal with timeout
526  * @fence: radeon fence object
529  * Wait for the requested fence to signal (all asics).
531  * (false) sleep when waiting for the fence.
536 long radeon_fence_wait_timeout(struct radeon_fence *fence, bool intr, long timeout)  in radeon_fence_wait_timeout()  argument
547 	if (WARN_ON_ONCE(!to_radeon_fence(&fence->base)))  in radeon_fence_wait_timeout()
548 		return dma_fence_wait(&fence->base, intr);  in radeon_fence_wait_timeout()
550 	seq[fence->ring] = fence->seq;  in radeon_fence_wait_timeout()
551 	r = radeon_fence_wait_seq_timeout(fence->rdev, seq, intr, timeout);  in radeon_fence_wait_timeout()
556 	dma_fence_signal(&fence->base);  in radeon_fence_wait_timeout()
561  * radeon_fence_wait - wait for a fence to signal
563  * @fence: radeon fence object
566  * Wait for the requested fence to signal (all asics).
568  * (false) sleep when waiting for the fence.
569  * Returns 0 if the fence has passed, error for all other cases.
571 int radeon_fence_wait(struct radeon_fence *fence, bool intr)  in radeon_fence_wait()  argument
573 	long r = radeon_fence_wait_timeout(fence, intr, MAX_SCHEDULE_TIMEOUT);  in radeon_fence_wait()
582  * radeon_fence_wait_any - wait for a fence to signal on any ring
585  * @fences: radeon fence object(s)
588  * Wait for any requested fence to signal (all asics).  Fence
592  * Returns 0 if any fence has passed, error for all other cases.
625  * radeon_fence_wait_next - wait for the next fence to signal
628  * @ring: ring index the fence is associated with
630  * Wait for the next fence on the requested ring to signal (all asics).
631  * Returns 0 if the next fence has passed, error for all other cases.
642 		   already the last emited fence */  in radeon_fence_wait_next()
655  * @ring: ring index the fence is associated with
682  * radeon_fence_ref - take a ref on a fence
684  * @fence: radeon fence object
686  * Take a reference on a fence (all asics).
687  * Returns the fence.
689 struct radeon_fence *radeon_fence_ref(struct radeon_fence *fence)  in radeon_fence_ref()  argument
691 	dma_fence_get(&fence->base);  in radeon_fence_ref()
692 	return fence;  in radeon_fence_ref()
696  * radeon_fence_unref - remove a ref on a fence
698  * @fence: radeon fence object
700  * Remove a reference on a fence (all asics).
702 void radeon_fence_unref(struct radeon_fence **fence)  in radeon_fence_unref()  argument
704 	struct radeon_fence *tmp = *fence;  in radeon_fence_unref()
706 	*fence = NULL;  in radeon_fence_unref()
716  * @ring: ring index the fence is associated with
727 	 * but it's ok to report slightly wrong fence count here.  in radeon_fence_count_emitted()
742  * @fence: radeon fence object
745  * Check if the fence needs to be synced against another ring
750 bool radeon_fence_need_sync(struct radeon_fence *fence, int dst_ring)  in radeon_fence_need_sync()  argument
754 	if (!fence) {  in radeon_fence_need_sync()
758 	if (fence->ring == dst_ring) {  in radeon_fence_need_sync()
763 	fdrv = &fence->rdev->fence_drv[dst_ring];  in radeon_fence_need_sync()
764 	if (fence->seq <= fdrv->sync_seq[fence->ring]) {  in radeon_fence_need_sync()
774  * @fence: radeon fence object
777  * Note the sequence number at which point the fence will
780 void radeon_fence_note_sync(struct radeon_fence *fence, int dst_ring)  in radeon_fence_note_sync()  argument
785 	if (!fence) {  in radeon_fence_note_sync()
789 	if (fence->ring == dst_ring) {  in radeon_fence_note_sync()
794 	src = &fence->rdev->fence_drv[fence->ring];  in radeon_fence_note_sync()
795 	dst = &fence->rdev->fence_drv[dst_ring];  in radeon_fence_note_sync()
805  * radeon_fence_driver_start_ring - make the fence driver
809  * @ring: ring index to start the fence driver on
811  * Make the fence driver ready for processing (all asics).
813  * start the fence driver on the rings it has.
831 			/* put fence directly behind firmware */  in radeon_fence_driver_start_ring()
840 			dev_err(rdev->dev, "fence failed to get scratch register\n");  in radeon_fence_driver_start_ring()
851 	dev_info(rdev->dev, "fence driver on ring %d use gpu addr 0x%016llx\n",  in radeon_fence_driver_start_ring()
857  * radeon_fence_driver_init_ring - init the fence driver
861  * @ring: ring index to start the fence driver on
863  * Init the fence driver for the requested ring (all asics).
883  * radeon_fence_driver_init - init the fence driver
888  * Init the fence driver for all possible rings (all asics).
890  * start the fence driver on the rings it has using
906  * radeon_fence_driver_fini - tear down the fence driver
911  * Tear down the fence driver for all possible rings (all asics).
935  * radeon_fence_driver_force_completion - force all fence waiter to complete
940  * In case of GPU reset failure make sure no process keep waiting on fence
953  * Fence debugfs
968 		seq_printf(m, "Last signaled fence 0x%016llx\n",  in radeon_debugfs_fence_info_show()
985  * Manually trigger a gpu reset at the next fence wait.
1018 static const char *radeon_fence_get_driver_name(struct dma_fence *fence)  in radeon_fence_get_driver_name()  argument
1025 	struct radeon_fence *fence = to_radeon_fence(f);  in radeon_fence_get_timeline_name()  local
1026 	switch (fence->ring) {  in radeon_fence_get_timeline_name()
1039 static inline bool radeon_test_signaled(struct radeon_fence *fence)  in radeon_test_signaled()  argument
1041 	return test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->base.flags);  in radeon_test_signaled()
1050 radeon_fence_wait_cb(struct dma_fence *fence, struct dma_fence_cb *cb)  in radeon_fence_wait_cb()  argument
1061 	struct radeon_fence *fence = to_radeon_fence(f);  in radeon_fence_default_wait()  local
1062 	struct radeon_device *rdev = fence->rdev;  in radeon_fence_default_wait()
1080 		if (radeon_test_signaled(fence))  in radeon_fence_default_wait()