1/*
2 * Copyright 2013 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Alex Deucher
23 */
24#include <drm/drmP.h>
25#include "radeon.h"
26#include "radeon_asic.h"
27#include "rv770d.h"
28
29/**
30 * rv770_copy_dma - copy pages using the DMA engine
31 *
32 * @rdev: radeon_device pointer
33 * @src_offset: src GPU address
34 * @dst_offset: dst GPU address
35 * @num_gpu_pages: number of GPU pages to xfer
36 * @resv: reservation object to sync to
37 *
38 * Copy GPU paging using the DMA engine (r7xx).
39 * Used by the radeon ttm implementation to move pages if
40 * registered as the asic copy callback.
41 */
42struct radeon_fence *rv770_copy_dma(struct radeon_device *rdev,
43 uint64_t src_offset, uint64_t dst_offset,
44 unsigned num_gpu_pages,
45 struct reservation_object *resv)
46{
47 struct radeon_fence *fence;
48 struct radeon_sync sync;
49 int ring_index = rdev->asic->copy.dma_ring_index;
50 struct radeon_ring *ring = &rdev->ring[ring_index];
51 u32 size_in_dw, cur_size_in_dw;
52 int i, num_loops;
53 int r = 0;
54
55 radeon_sync_create(&sync);
56
57 size_in_dw = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT) / 4;
58 num_loops = DIV_ROUND_UP(size_in_dw, 0xFFFF);
59 r = radeon_ring_lock(rdev, ring, num_loops * 5 + 8);
60 if (r) {
61 DRM_ERROR("radeon: moving bo (%d).\n", r);
62 radeon_sync_free(rdev, &sync, NULL);
63 return ERR_PTR(r);
64 }
65
66 radeon_sync_resv(rdev, &sync, resv, false);
67 radeon_sync_rings(rdev, &sync, ring->idx);
68
69 for (i = 0; i < num_loops; i++) {
70 cur_size_in_dw = size_in_dw;
71 if (cur_size_in_dw > 0xFFFF)
72 cur_size_in_dw = 0xFFFF;
73 size_in_dw -= cur_size_in_dw;
74 radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 0, 0, cur_size_in_dw));
75 radeon_ring_write(ring, dst_offset & 0xfffffffc);
76 radeon_ring_write(ring, src_offset & 0xfffffffc);
77 radeon_ring_write(ring, upper_32_bits(dst_offset) & 0xff);
78 radeon_ring_write(ring, upper_32_bits(src_offset) & 0xff);
79 src_offset += cur_size_in_dw * 4;
80 dst_offset += cur_size_in_dw * 4;
81 }
82
83 r = radeon_fence_emit(rdev, &fence, ring->idx);
84 if (r) {
85 radeon_ring_unlock_undo(rdev, ring);
86 radeon_sync_free(rdev, &sync, NULL);
87 return ERR_PTR(r);
88 }
89
90 radeon_ring_unlock_commit(rdev, ring, false);
91 radeon_sync_free(rdev, &sync, fence);
92
93 return fence;
94}
95