diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/rv770_dma.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/rv770_dma.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rv770_dma.c b/drivers/gpu/drm/radeon/rv770_dma.c new file mode 100644 index 000000000..acff6e09c --- /dev/null +++ b/drivers/gpu/drm/radeon/rv770_dma.c @@ -0,0 +1,94 @@ +/* + * Copyright 2013 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Alex Deucher + */ +#include <drm/drmP.h> +#include "radeon.h" +#include "radeon_asic.h" +#include "rv770d.h" + +/** + * rv770_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 (r7xx). + * Used by the radeon ttm implementation to move pages if + * registered as the asic copy callback. + */ +struct radeon_fence *rv770_copy_dma(struct radeon_device *rdev, + uint64_t src_offset, uint64_t dst_offset, + unsigned num_gpu_pages, + struct reservation_object *resv) +{ + struct radeon_fence *fence; + struct radeon_sync sync; + 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; + + radeon_sync_create(&sync); + + size_in_dw = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT) / 4; + num_loops = DIV_ROUND_UP(size_in_dw, 0xFFFF); + r = radeon_ring_lock(rdev, ring, num_loops * 5 + 8); + if (r) { + DRM_ERROR("radeon: moving bo (%d).\n", r); + radeon_sync_free(rdev, &sync, NULL); + return ERR_PTR(r); + } + + radeon_sync_resv(rdev, &sync, resv, false); + radeon_sync_rings(rdev, &sync, ring->idx); + + for (i = 0; i < num_loops; i++) { + cur_size_in_dw = size_in_dw; + if (cur_size_in_dw > 0xFFFF) + cur_size_in_dw = 0xFFFF; + 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); + radeon_ring_write(ring, 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_sync_free(rdev, &sync, NULL); + return ERR_PTR(r); + } + + radeon_ring_unlock_commit(rdev, ring, false); + radeon_sync_free(rdev, &sync, fence); + + return fence; +} |