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