drm/radeon/evergreen_dma.c

31  * evergreen_dma_fence_ring_emit - emit a fence on the DMA ring
36  * Add a DMA fence packet to the ring to write
37  * the fence seq number and DMA trap packet to generate
38  * an interrupt if needed (evergreen-SI).
43 	struct radeon_ring *ring = &rdev->ring[fence->ring];  in evergreen_dma_fence_ring_emit()
44 	u64 addr = rdev->fence_drv[fence->ring].gpu_addr;  in evergreen_dma_fence_ring_emit()
49 	radeon_ring_write(ring, fence->seq);  in evergreen_dma_fence_ring_emit()
59  * evergreen_dma_ring_ib_execute - schedule an IB on the DMA engine
64  * Schedule an IB in the DMA ring (evergreen).
69 	struct radeon_ring *ring = &rdev->ring[ib->ring];  in evergreen_dma_ring_ib_execute()
71 	if (rdev->wb.enabled) {  in evergreen_dma_ring_ib_execute()
72 		u32 next_rptr = ring->wptr + 4;  in evergreen_dma_ring_ib_execute()
77 		radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0xfffffffc);  in evergreen_dma_ring_ib_execute()
78 		radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr) & 0xff);  in evergreen_dma_ring_ib_execute()
82 	/* The indirect buffer packet must end on an 8 DW boundary in the DMA ring.  in evergreen_dma_ring_ib_execute()
85 	while ((ring->wptr & 7) != 5)  in evergreen_dma_ring_ib_execute()
88 	radeon_ring_write(ring, (ib->gpu_addr & 0xFFFFFFE0));  in evergreen_dma_ring_ib_execute()
89 	radeon_ring_write(ring, (ib->length_dw << 12) | (upper_32_bits(ib->gpu_addr) & 0xFF));  in evergreen_dma_ring_ib_execute()
94  * evergreen_copy_dma - copy pages using the DMA engine
102  * Copy GPU paging using the DMA engine (evergreen-cayman).
114 	int ring_index = rdev->asic->copy.dma_ring_index;  in evergreen_copy_dma()
115 	struct radeon_ring *ring = &rdev->ring[ring_index];  in evergreen_copy_dma()
132 	radeon_sync_rings(rdev, &sync, ring->idx);  in evergreen_copy_dma()
138 		size_in_dw -= cur_size_in_dw;  in evergreen_copy_dma()
148 	r = radeon_fence_emit(rdev, &fence, ring->idx);  in evergreen_copy_dma()
162  * evergreen_dma_is_lockup - Check if the DMA engine is locked up
167  * Check if the async DMA engine is locked up.
168  * Returns true if the engine appears to be locked up, false if not.