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2997 | Serge | 1 | /* |
2 | * Copyright 2011 Christian König. |
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3 | * All Rights Reserved. |
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4 | * |
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5 | * Permission is hereby granted, free of charge, to any person obtaining a |
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6 | * copy of this software and associated documentation files (the |
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7 | * "Software"), to deal in the Software without restriction, including |
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8 | * without limitation the rights to use, copy, modify, merge, publish, |
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9 | * distribute, sub license, and/or sell copies of the Software, and to |
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10 | * permit persons to whom the Software is furnished to do so, subject to |
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11 | * the following conditions: |
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12 | * |
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13 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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14 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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15 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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16 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
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17 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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18 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
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19 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
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20 | * |
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21 | * The above copyright notice and this permission notice (including the |
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22 | * next paragraph) shall be included in all copies or substantial portions |
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23 | * of the Software. |
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24 | * |
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25 | */ |
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26 | /* |
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27 | * Authors: |
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28 | * Christian König |
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29 | */ |
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30 | #include |
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31 | #include "radeon.h" |
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5078 | serge | 32 | #include "radeon_trace.h" |
2997 | Serge | 33 | |
34 | int radeon_semaphore_create(struct radeon_device *rdev, |
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35 | struct radeon_semaphore **semaphore) |
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36 | { |
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5078 | serge | 37 | uint32_t *cpu_addr; |
38 | int i, r; |
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2997 | Serge | 39 | |
40 | *semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL); |
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41 | if (*semaphore == NULL) { |
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42 | return -ENOMEM; |
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43 | } |
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5078 | serge | 44 | r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, &(*semaphore)->sa_bo, |
45 | 8 * RADEON_NUM_SYNCS, 8); |
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2997 | Serge | 46 | if (r) { |
47 | kfree(*semaphore); |
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48 | *semaphore = NULL; |
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49 | return r; |
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50 | } |
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51 | (*semaphore)->waiters = 0; |
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52 | (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo); |
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5078 | serge | 53 | |
54 | cpu_addr = radeon_sa_bo_cpu_addr((*semaphore)->sa_bo); |
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55 | for (i = 0; i < RADEON_NUM_SYNCS; ++i) |
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56 | cpu_addr[i] = 0; |
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57 | |||
58 | for (i = 0; i < RADEON_NUM_RINGS; ++i) |
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59 | (*semaphore)->sync_to[i] = NULL; |
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60 | |||
2997 | Serge | 61 | return 0; |
62 | } |
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63 | |||
5078 | serge | 64 | bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx, |
2997 | Serge | 65 | struct radeon_semaphore *semaphore) |
66 | { |
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5078 | serge | 67 | struct radeon_ring *ring = &rdev->ring[ridx]; |
68 | |||
69 | trace_radeon_semaphore_signale(ridx, semaphore); |
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70 | |||
71 | if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, false)) { |
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2997 | Serge | 72 | --semaphore->waiters; |
5078 | serge | 73 | |
74 | /* for debugging lockup only, used by sysfs debug files */ |
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75 | ring->last_semaphore_signal_addr = semaphore->gpu_addr; |
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76 | return true; |
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77 | } |
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78 | return false; |
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2997 | Serge | 79 | } |
80 | |||
5078 | serge | 81 | bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx, |
2997 | Serge | 82 | struct radeon_semaphore *semaphore) |
83 | { |
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5078 | serge | 84 | struct radeon_ring *ring = &rdev->ring[ridx]; |
85 | |||
86 | trace_radeon_semaphore_wait(ridx, semaphore); |
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87 | |||
88 | if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, true)) { |
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2997 | Serge | 89 | ++semaphore->waiters; |
5078 | serge | 90 | |
91 | /* for debugging lockup only, used by sysfs debug files */ |
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92 | ring->last_semaphore_wait_addr = semaphore->gpu_addr; |
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93 | return true; |
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94 | } |
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95 | return false; |
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2997 | Serge | 96 | } |
97 | |||
5078 | serge | 98 | /** |
99 | * radeon_semaphore_sync_to - use the semaphore to sync to a fence |
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100 | * |
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101 | * @semaphore: semaphore object to add fence to |
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102 | * @fence: fence to sync to |
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103 | * |
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104 | * Sync to the fence using this semaphore object |
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105 | */ |
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106 | void radeon_semaphore_sync_to(struct radeon_semaphore *semaphore, |
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107 | struct radeon_fence *fence) |
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108 | { |
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109 | struct radeon_fence *other; |
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110 | |||
111 | if (!fence) |
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112 | return; |
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113 | |||
114 | other = semaphore->sync_to[fence->ring]; |
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115 | semaphore->sync_to[fence->ring] = radeon_fence_later(fence, other); |
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116 | } |
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117 | |||
118 | /** |
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119 | * radeon_semaphore_sync_rings - sync ring to all registered fences |
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120 | * |
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121 | * @rdev: radeon_device pointer |
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122 | * @semaphore: semaphore object to use for sync |
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123 | * @ring: ring that needs sync |
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124 | * |
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125 | * Ensure that all registered fences are signaled before letting |
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126 | * the ring continue. The caller must hold the ring lock. |
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127 | */ |
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2997 | Serge | 128 | int radeon_semaphore_sync_rings(struct radeon_device *rdev, |
129 | struct radeon_semaphore *semaphore, |
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5078 | serge | 130 | int ring) |
2997 | Serge | 131 | { |
5078 | serge | 132 | unsigned count = 0; |
133 | int i, r; |
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2997 | Serge | 134 | |
5078 | serge | 135 | for (i = 0; i < RADEON_NUM_RINGS; ++i) { |
136 | struct radeon_fence *fence = semaphore->sync_to[i]; |
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2997 | Serge | 137 | |
5078 | serge | 138 | /* check if we really need to sync */ |
139 | if (!radeon_fence_need_sync(fence, ring)) |
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140 | continue; |
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141 | |||
2997 | Serge | 142 | /* prevent GPU deadlocks */ |
5078 | serge | 143 | if (!rdev->ring[i].ready) { |
144 | dev_err(rdev->dev, "Syncing to a disabled ring!"); |
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2997 | Serge | 145 | return -EINVAL; |
146 | } |
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147 | |||
5078 | serge | 148 | if (++count > RADEON_NUM_SYNCS) { |
149 | /* not enough room, wait manually */ |
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150 | r = radeon_fence_wait(fence, false); |
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151 | if (r) |
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152 | return r; |
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153 | continue; |
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154 | } |
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155 | |||
156 | /* allocate enough space for sync command */ |
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157 | r = radeon_ring_alloc(rdev, &rdev->ring[i], 16); |
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2997 | Serge | 158 | if (r) { |
159 | return r; |
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160 | } |
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161 | |||
5078 | serge | 162 | /* emit the signal semaphore */ |
163 | if (!radeon_semaphore_emit_signal(rdev, i, semaphore)) { |
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164 | /* signaling wasn't successful wait manually */ |
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165 | radeon_ring_undo(&rdev->ring[i]); |
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166 | r = radeon_fence_wait(fence, false); |
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167 | if (r) |
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168 | return r; |
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169 | continue; |
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170 | } |
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171 | |||
2997 | Serge | 172 | /* we assume caller has already allocated space on waiters ring */ |
5078 | serge | 173 | if (!radeon_semaphore_emit_wait(rdev, ring, semaphore)) { |
174 | /* waiting wasn't successful wait manually */ |
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175 | radeon_ring_undo(&rdev->ring[i]); |
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176 | r = radeon_fence_wait(fence, false); |
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177 | if (r) |
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178 | return r; |
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179 | continue; |
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180 | } |
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2997 | Serge | 181 | |
5078 | serge | 182 | radeon_ring_commit(rdev, &rdev->ring[i], false); |
183 | radeon_fence_note_sync(fence, ring); |
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3764 | Serge | 184 | |
5078 | serge | 185 | semaphore->gpu_addr += 8; |
186 | } |
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187 | |||
2997 | Serge | 188 | return 0; |
189 | } |
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190 | |||
191 | void radeon_semaphore_free(struct radeon_device *rdev, |
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192 | struct radeon_semaphore **semaphore, |
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193 | struct radeon_fence *fence) |
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194 | { |
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195 | if (semaphore == NULL || *semaphore == NULL) { |
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196 | return; |
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197 | } |
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198 | if ((*semaphore)->waiters > 0) { |
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199 | dev_err(rdev->dev, "semaphore %p has more waiters than signalers," |
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200 | " hardware lockup imminent!\n", *semaphore); |
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201 | } |
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202 | radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence); |
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203 | kfree(*semaphore); |
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204 | *semaphore = NULL; |
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205 | }>>> |