1/*
2 * Copyright 2010 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 "evergreend.h"
28
29u32 evergreen_gpu_check_soft_reset(struct radeon_device *rdev);
30
31/**
32 * evergreen_dma_fence_ring_emit - emit a fence on the DMA ring
33 *
34 * @rdev: radeon_device pointer
35 * @fence: radeon fence object
36 *
37 * Add a DMA fence packet to the ring to write
38 * the fence seq number and DMA trap packet to generate
39 * an interrupt if needed (evergreen-SI).
40 */
41void evergreen_dma_fence_ring_emit(struct radeon_device *rdev,
42 struct radeon_fence *fence)
43{
44 struct radeon_ring *ring = &rdev->ring[fence->ring];
45 u64 addr = rdev->fence_drv[fence->ring].gpu_addr;
46 /* write the fence */
47 radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_FENCE, 0, 0));
48 radeon_ring_write(ring, addr & 0xfffffffc);
49 radeon_ring_write(ring, (upper_32_bits(addr) & 0xff));
50 radeon_ring_write(ring, fence->seq);
51 /* generate an interrupt */
52 radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_TRAP, 0, 0));
53 /* flush HDP */
54 radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0));
55 radeon_ring_write(ring, (0xf << 16) | (HDP_MEM_COHERENCY_FLUSH_CNTL >> 2));
56 radeon_ring_write(ring, 1);
57}
58
59/**
60 * evergreen_dma_ring_ib_execute - schedule an IB on the DMA engine
61 *
62 * @rdev: radeon_device pointer
63 * @ib: IB object to schedule
64 *
65 * Schedule an IB in the DMA ring (evergreen).
66 */
67void evergreen_dma_ring_ib_execute(struct radeon_device *rdev,
68 struct radeon_ib *ib)
69{
70 struct radeon_ring *ring = &rdev->ring[ib->ring];
71
72 if (rdev->wb.enabled) {
73 u32 next_rptr = ring->wptr + 4;
74 while ((next_rptr & 7) != 5)
75 next_rptr++;
76 next_rptr += 3;
77 radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 1));
78 radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0xfffffffc);
79 radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr) & 0xff);
80 radeon_ring_write(ring, next_rptr);
81 }
82
83 /* The indirect buffer packet must end on an 8 DW boundary in the DMA ring.
84 * Pad as necessary with NOPs.
85 */
86 while ((ring->wptr & 7) != 5)
87 radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_NOP, 0, 0));
88 radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_INDIRECT_BUFFER, 0, 0));
89 radeon_ring_write(ring, (ib->gpu_addr & 0xFFFFFFE0));
90 radeon_ring_write(ring, (ib->length_dw << 12) | (upper_32_bits(ib->gpu_addr) & 0xFF));
91
92}
93
94/**
95 * evergreen_copy_dma - copy pages using the DMA engine
96 *
97 * @rdev: radeon_device pointer
98 * @src_offset: src GPU address
99 * @dst_offset: dst GPU address
100 * @num_gpu_pages: number of GPU pages to xfer
101 * @fence: radeon fence object
102 *
103 * Copy GPU paging using the DMA engine (evergreen-cayman).
104 * Used by the radeon ttm implementation to move pages if
105 * registered as the asic copy callback.
106 */
107struct radeon_fence *evergreen_copy_dma(struct radeon_device *rdev,
108 uint64_t src_offset,
109 uint64_t dst_offset,
110 unsigned num_gpu_pages,
111 struct reservation_object *resv)
112{
113 struct radeon_fence *fence;
114 struct radeon_sync sync;
115 int ring_index = rdev->asic->copy.dma_ring_index;
116 struct radeon_ring *ring = &rdev->ring[ring_index];
117 u32 size_in_dw, cur_size_in_dw;
118 int i, num_loops;
119 int r = 0;
120
121 radeon_sync_create(&sync);
122
123 size_in_dw = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT) / 4;
124 num_loops = DIV_ROUND_UP(size_in_dw, 0xfffff);
125 r = radeon_ring_lock(rdev, ring, num_loops * 5 + 11);
126 if (r) {
127 DRM_ERROR("radeon: moving bo (%d).\n", r);
128 radeon_sync_free(rdev, &sync, NULL);
129 return ERR_PTR(r);
130 }
131
132 radeon_sync_resv(rdev, &sync, resv, false);
133 radeon_sync_rings(rdev, &sync, ring->idx);
134
135 for (i = 0; i < num_loops; i++) {
136 cur_size_in_dw = size_in_dw;
137 if (cur_size_in_dw > 0xFFFFF)
138 cur_size_in_dw = 0xFFFFF;
139 size_in_dw -= cur_size_in_dw;
140 radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 0, cur_size_in_dw));
141 radeon_ring_write(ring, dst_offset & 0xfffffffc);
142 radeon_ring_write(ring, src_offset & 0xfffffffc);
143 radeon_ring_write(ring, upper_32_bits(dst_offset) & 0xff);
144 radeon_ring_write(ring, upper_32_bits(src_offset) & 0xff);
145 src_offset += cur_size_in_dw * 4;
146 dst_offset += cur_size_in_dw * 4;
147 }
148
149 r = radeon_fence_emit(rdev, &fence, ring->idx);
150 if (r) {
151 radeon_ring_unlock_undo(rdev, ring);
152 radeon_sync_free(rdev, &sync, NULL);
153 return ERR_PTR(r);
154 }
155
156 radeon_ring_unlock_commit(rdev, ring, false);
157 radeon_sync_free(rdev, &sync, fence);
158
159 return fence;
160}
161
162/**
163 * evergreen_dma_is_lockup - Check if the DMA engine is locked up
164 *
165 * @rdev: radeon_device pointer
166 * @ring: radeon_ring structure holding ring information
167 *
168 * Check if the async DMA engine is locked up.
169 * Returns true if the engine appears to be locked up, false if not.
170 */
171bool evergreen_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
172{
173 u32 reset_mask = evergreen_gpu_check_soft_reset(rdev);
174
175 if (!(reset_mask & RADEON_RESET_DMA)) {
176 radeon_ring_lockup_update(rdev, ring);
177 return false;
178 }
179 return radeon_ring_test_lockup(rdev, ring);
180}
181
182
183