0,0 → 1,97 |
/* |
* 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 |
* @fence: radeon fence object |
* |
* Copy GPU paging using the DMA engine (r7xx). |
* Used by the radeon ttm implementation to move pages if |
* registered as the asic copy callback. |
*/ |
int rv770_copy_dma(struct radeon_device *rdev, |
uint64_t src_offset, uint64_t dst_offset, |
unsigned num_gpu_pages, |
struct radeon_fence **fence) |
{ |
struct radeon_semaphore *sem = NULL; |
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 r; |
} |
|
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_semaphore_free(rdev, &sem, NULL); |
return r; |
} |
|
radeon_semaphore_sync_to(sem, *fence); |
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 > 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_semaphore_free(rdev, &sem, NULL); |
return r; |
} |
|
radeon_ring_unlock_commit(rdev, ring, false); |
radeon_semaphore_free(rdev, &sem, *fence); |
|
return r; |
} |