/** * cik_copy_dma - copy pages using the DMA engine * * @rdev: radeon_device pointer * @src_offset: src GPU address * @dst_offset: dst GPU address * @num_gpu_pages: number of GPU pages to xfer * @resv: reservation object to sync to * * Copy GPU paging using the DMA engine (CIK). * Used by the radeon ttm implementation to move pages if * registered as the asic copy callback. */ struct radeon_fence *cik_copy_dma(struct radeon_device *rdev, uint64_t src_offset, uint64_t dst_offset, unsigned num_gpu_pages, struct reservation_object *resv) { struct radeon_semaphore *sem = NULL; struct radeon_fence *fence; int ring_index = rdev->asic->copy.dma_ring_index; struct radeon_ring *ring = &rdev->ring[ring_index]; u32 size_in_bytes, cur_size_in_bytes; int i, num_loops; int r = 0; r = radeon_semaphore_create(rdev, &sem); if (r) { DRM_ERROR("radeon: moving bo (%d).\n", r); return ERR_PTR(r); } size_in_bytes = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT); num_loops = DIV_ROUND_UP(size_in_bytes, 0x1fffff); r = radeon_ring_lock(rdev, ring, num_loops * 7 + 14); if (r) { DRM_ERROR("radeon: moving bo (%d).\n", r); radeon_semaphore_free(rdev, &sem, NULL); return ERR_PTR(r); } radeon_semaphore_sync_resv(rdev, sem, resv, false); radeon_semaphore_sync_rings(rdev, sem, ring->idx); for (i = 0; i < num_loops; i++) { cur_size_in_bytes = size_in_bytes; if (cur_size_in_bytes > 0x1fffff) cur_size_in_bytes = 0x1fffff; size_in_bytes -= cur_size_in_bytes; radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_COPY, SDMA_COPY_SUB_OPCODE_LINEAR, 0)); radeon_ring_write(ring, cur_size_in_bytes); radeon_ring_write(ring, 0); /* src/dst endian swap */ radeon_ring_write(ring, lower_32_bits(src_offset)); radeon_ring_write(ring, upper_32_bits(src_offset)); radeon_ring_write(ring, lower_32_bits(dst_offset)); radeon_ring_write(ring, upper_32_bits(dst_offset)); src_offset += cur_size_in_bytes; dst_offset += cur_size_in_bytes; } r = radeon_fence_emit(rdev, &fence, ring->idx); if (r) { radeon_ring_unlock_undo(rdev, ring); radeon_semaphore_free(rdev, &sem, NULL); return ERR_PTR(r); } radeon_ring_unlock_commit(rdev, ring, false); radeon_semaphore_free(rdev, &sem, fence); return fence; }
/** * r600_copy_dma - copy pages using the DMA engine * * @rdev: radeon_device pointer * @src_offset: src GPU address * @dst_offset: dst GPU address * @num_gpu_pages: number of GPU pages to xfer * @resv: reservation object to sync to * * Copy GPU paging using the DMA engine (r6xx). * Used by the radeon ttm implementation to move pages if * registered as the asic copy callback. */ struct radeon_fence *r600_copy_dma(struct radeon_device *rdev, uint64_t src_offset, uint64_t dst_offset, unsigned num_gpu_pages, struct reservation_object *resv) { struct radeon_semaphore *sem = NULL; struct radeon_fence *fence; int ring_index = rdev->asic->copy.dma_ring_index; struct radeon_ring *ring = &rdev->ring[ring_index]; u32 size_in_dw, cur_size_in_dw; int i, num_loops; int r = 0; r = radeon_semaphore_create(rdev, &sem); if (r) { DRM_ERROR("radeon: moving bo (%d).\n", r); return ERR_PTR(r); } size_in_dw = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT) / 4; num_loops = DIV_ROUND_UP(size_in_dw, 0xFFFE); r = radeon_ring_lock(rdev, ring, num_loops * 4 + 8); if (r) { DRM_ERROR("radeon: moving bo (%d).\n", r); radeon_semaphore_free(rdev, &sem, NULL); return ERR_PTR(r); } radeon_semaphore_sync_resv(rdev, sem, resv, false); radeon_semaphore_sync_rings(rdev, sem, ring->idx); for (i = 0; i < num_loops; i++) { cur_size_in_dw = size_in_dw; if (cur_size_in_dw > 0xFFFE) cur_size_in_dw = 0xFFFE; size_in_dw -= cur_size_in_dw; radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 0, 0, cur_size_in_dw)); radeon_ring_write(ring, dst_offset & 0xfffffffc); radeon_ring_write(ring, src_offset & 0xfffffffc); radeon_ring_write(ring, (((upper_32_bits(dst_offset) & 0xff) << 16) | (upper_32_bits(src_offset) & 0xff))); src_offset += cur_size_in_dw * 4; dst_offset += cur_size_in_dw * 4; } r = radeon_fence_emit(rdev, &fence, ring->idx); if (r) { radeon_ring_unlock_undo(rdev, ring); radeon_semaphore_free(rdev, &sem, NULL); return ERR_PTR(r); } radeon_ring_unlock_commit(rdev, ring, false); radeon_semaphore_free(rdev, &sem, fence); return fence; }