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4075 | Serge | 1 | /************************************************************************** |
2 | * |
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3 | * Copyright © 2011 VMware, Inc., Palo Alto, CA., USA |
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4 | * All Rights Reserved. |
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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7 | * copy of this software and associated documentation files (the |
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8 | * "Software"), to deal in the Software without restriction, including |
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9 | * without limitation the rights to use, copy, modify, merge, publish, |
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10 | * distribute, sub license, and/or sell copies of the Software, and to |
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11 | * permit persons to whom the Software is furnished to do so, subject to |
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12 | * the following conditions: |
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13 | * |
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14 | * The above copyright notice and this permission notice (including the |
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15 | * next paragraph) shall be included in all copies or substantial portions |
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16 | * of the Software. |
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17 | * |
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18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
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22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
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24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
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25 | * |
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26 | **************************************************************************/ |
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27 | |||
28 | #include |
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29 | |||
30 | #include |
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31 | #include "vmwgfx_drv.h" |
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32 | |||
33 | |||
34 | /** |
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35 | * vmw_dmabuf_to_placement - Validate a buffer to placement. |
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36 | * |
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37 | * @dev_priv: Driver private. |
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38 | * @buf: DMA buffer to move. |
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39 | * @pin: Pin buffer if true. |
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40 | * @interruptible: Use interruptible wait. |
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41 | * |
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42 | * May only be called by the current master since it assumes that the |
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43 | * master lock is the current master's lock. |
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44 | * This function takes the master's lock in write mode. |
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45 | * Flushes and unpins the query bo to avoid failures. |
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46 | * |
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47 | * Returns |
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48 | * -ERESTARTSYS if interrupted by a signal. |
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49 | */ |
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50 | int vmw_dmabuf_to_placement(struct vmw_private *dev_priv, |
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51 | struct vmw_dma_buffer *buf, |
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52 | struct ttm_placement *placement, |
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53 | bool interruptible) |
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54 | { |
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55 | // struct vmw_master *vmaster = dev_priv->active_master; |
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56 | struct ttm_buffer_object *bo = &buf->base; |
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57 | int ret; |
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58 | |||
59 | // ret = ttm_write_lock(&vmaster->lock, interruptible); |
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60 | // if (unlikely(ret != 0)) |
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61 | // return ret; |
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62 | |||
63 | vmw_execbuf_release_pinned_bo(dev_priv); |
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64 | |||
65 | ret = ttm_bo_reserve(bo, interruptible, false, false, 0); |
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66 | if (unlikely(ret != 0)) |
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67 | goto err; |
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68 | |||
69 | ret = ttm_bo_validate(bo, placement, interruptible, false); |
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70 | |||
71 | ttm_bo_unreserve(bo); |
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72 | |||
73 | err: |
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74 | // ttm_write_unlock(&vmaster->lock); |
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75 | return ret; |
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76 | } |
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77 | |||
78 | /** |
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79 | * vmw_dmabuf_to_vram_or_gmr - Move a buffer to vram or gmr. |
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80 | * |
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81 | * May only be called by the current master since it assumes that the |
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82 | * master lock is the current master's lock. |
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83 | * This function takes the master's lock in write mode. |
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84 | * Flushes and unpins the query bo if @pin == true to avoid failures. |
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85 | * |
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86 | * @dev_priv: Driver private. |
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87 | * @buf: DMA buffer to move. |
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88 | * @pin: Pin buffer if true. |
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89 | * @interruptible: Use interruptible wait. |
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90 | * |
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91 | * Returns |
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92 | * -ERESTARTSYS if interrupted by a signal. |
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93 | */ |
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94 | int vmw_dmabuf_to_vram_or_gmr(struct vmw_private *dev_priv, |
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95 | struct vmw_dma_buffer *buf, |
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96 | bool pin, bool interruptible) |
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97 | { |
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98 | // struct vmw_master *vmaster = dev_priv->active_master; |
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99 | struct ttm_buffer_object *bo = &buf->base; |
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100 | struct ttm_placement *placement; |
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101 | int ret; |
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102 | |||
103 | // ret = ttm_write_lock(&vmaster->lock, interruptible); |
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104 | // if (unlikely(ret != 0)) |
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105 | // return ret; |
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106 | |||
107 | if (pin) |
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108 | vmw_execbuf_release_pinned_bo(dev_priv); |
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109 | |||
110 | ret = ttm_bo_reserve(bo, interruptible, false, false, 0); |
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111 | if (unlikely(ret != 0)) |
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112 | goto err; |
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113 | |||
114 | /** |
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115 | * Put BO in VRAM if there is space, otherwise as a GMR. |
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116 | * If there is no space in VRAM and GMR ids are all used up, |
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117 | * start evicting GMRs to make room. If the DMA buffer can't be |
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118 | * used as a GMR, this will return -ENOMEM. |
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119 | */ |
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120 | |||
121 | if (pin) |
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122 | placement = &vmw_vram_gmr_ne_placement; |
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123 | else |
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124 | placement = &vmw_vram_gmr_placement; |
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125 | |||
126 | ret = ttm_bo_validate(bo, placement, interruptible, false); |
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127 | if (likely(ret == 0) || ret == -ERESTARTSYS) |
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128 | goto err_unreserve; |
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129 | |||
130 | |||
131 | /** |
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132 | * If that failed, try VRAM again, this time evicting |
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133 | * previous contents. |
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134 | */ |
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135 | |||
136 | if (pin) |
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137 | placement = &vmw_vram_ne_placement; |
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138 | else |
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139 | placement = &vmw_vram_placement; |
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140 | |||
141 | ret = ttm_bo_validate(bo, placement, interruptible, false); |
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142 | |||
143 | err_unreserve: |
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144 | ttm_bo_unreserve(bo); |
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145 | err: |
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146 | // ttm_write_unlock(&vmaster->lock); |
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147 | return ret; |
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148 | } |
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149 | |||
150 | /** |
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151 | * vmw_dmabuf_to_vram - Move a buffer to vram. |
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152 | * |
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153 | * May only be called by the current master since it assumes that the |
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154 | * master lock is the current master's lock. |
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155 | * This function takes the master's lock in write mode. |
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156 | * |
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157 | * @dev_priv: Driver private. |
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158 | * @buf: DMA buffer to move. |
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159 | * @pin: Pin buffer in vram if true. |
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160 | * @interruptible: Use interruptible wait. |
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161 | * |
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162 | * Returns |
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163 | * -ERESTARTSYS if interrupted by a signal. |
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164 | */ |
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165 | int vmw_dmabuf_to_vram(struct vmw_private *dev_priv, |
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166 | struct vmw_dma_buffer *buf, |
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167 | bool pin, bool interruptible) |
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168 | { |
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169 | struct ttm_placement *placement; |
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170 | |||
171 | if (pin) |
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172 | placement = &vmw_vram_ne_placement; |
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173 | else |
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174 | placement = &vmw_vram_placement; |
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175 | |||
176 | return vmw_dmabuf_to_placement(dev_priv, buf, |
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177 | placement, |
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178 | interruptible); |
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179 | } |
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180 | |||
181 | /** |
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182 | * vmw_dmabuf_to_start_of_vram - Move a buffer to start of vram. |
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183 | * |
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184 | * May only be called by the current master since it assumes that the |
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185 | * master lock is the current master's lock. |
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186 | * This function takes the master's lock in write mode. |
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187 | * Flushes and unpins the query bo if @pin == true to avoid failures. |
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188 | * |
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189 | * @dev_priv: Driver private. |
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190 | * @buf: DMA buffer to move. |
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191 | * @pin: Pin buffer in vram if true. |
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192 | * @interruptible: Use interruptible wait. |
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193 | * |
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194 | * Returns |
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195 | * -ERESTARTSYS if interrupted by a signal. |
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196 | */ |
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197 | int vmw_dmabuf_to_start_of_vram(struct vmw_private *dev_priv, |
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198 | struct vmw_dma_buffer *buf, |
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199 | bool pin, bool interruptible) |
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200 | { |
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201 | // struct vmw_master *vmaster = dev_priv->active_master; |
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202 | struct ttm_buffer_object *bo = &buf->base; |
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203 | struct ttm_placement placement; |
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204 | int ret = 0; |
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205 | |||
206 | if (pin) |
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207 | placement = vmw_vram_ne_placement; |
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208 | else |
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209 | placement = vmw_vram_placement; |
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210 | placement.lpfn = bo->num_pages; |
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211 | |||
212 | // ret = ttm_write_lock(&vmaster->lock, interruptible); |
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213 | // if (unlikely(ret != 0)) |
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214 | // return ret; |
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215 | |||
216 | if (pin) |
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217 | vmw_execbuf_release_pinned_bo(dev_priv); |
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218 | ret = ttm_bo_reserve(bo, interruptible, false, false, 0); |
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219 | if (unlikely(ret != 0)) |
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220 | goto err_unlock; |
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221 | |||
222 | /* Is this buffer already in vram but not at the start of it? */ |
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223 | if (bo->mem.mem_type == TTM_PL_VRAM && |
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224 | bo->mem.start < bo->num_pages && |
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225 | bo->mem.start > 0) |
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226 | (void) ttm_bo_validate(bo, &vmw_sys_placement, false, false); |
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227 | |||
228 | ret = ttm_bo_validate(bo, &placement, interruptible, false); |
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229 | |||
230 | /* For some reason we didn't up at the start of vram */ |
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231 | WARN_ON(ret == 0 && bo->offset != 0); |
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232 | |||
233 | ttm_bo_unreserve(bo); |
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234 | err_unlock: |
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235 | // ttm_write_unlock(&vmaster->lock); |
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236 | |||
237 | return ret; |
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238 | } |
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239 | |||
240 | |||
241 | /** |
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242 | * vmw_dmabuf_upin - Unpin the buffer given buffer, does not move the buffer. |
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243 | * |
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244 | * May only be called by the current master since it assumes that the |
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245 | * master lock is the current master's lock. |
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246 | * This function takes the master's lock in write mode. |
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247 | * |
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248 | * @dev_priv: Driver private. |
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249 | * @buf: DMA buffer to unpin. |
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250 | * @interruptible: Use interruptible wait. |
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251 | * |
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252 | * Returns |
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253 | * -ERESTARTSYS if interrupted by a signal. |
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254 | */ |
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255 | int vmw_dmabuf_unpin(struct vmw_private *dev_priv, |
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256 | struct vmw_dma_buffer *buf, |
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257 | bool interruptible) |
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258 | { |
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259 | /* |
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260 | * We could in theory early out if the buffer is |
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261 | * unpinned but we need to lock and reserve the buffer |
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262 | * anyways so we don't gain much by that. |
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263 | */ |
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264 | return vmw_dmabuf_to_placement(dev_priv, buf, |
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265 | &vmw_evictable_placement, |
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266 | interruptible); |
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267 | } |
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268 | |||
269 | |||
270 | /** |
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271 | * vmw_bo_get_guest_ptr - Get the guest ptr representing the current placement |
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272 | * of a buffer. |
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273 | * |
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274 | * @bo: Pointer to a struct ttm_buffer_object. Must be pinned or reserved. |
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275 | * @ptr: SVGAGuestPtr returning the result. |
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276 | */ |
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277 | void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *bo, |
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278 | SVGAGuestPtr *ptr) |
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279 | { |
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280 | if (bo->mem.mem_type == TTM_PL_VRAM) { |
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281 | ptr->gmrId = SVGA_GMR_FRAMEBUFFER; |
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282 | ptr->offset = bo->offset; |
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283 | } else { |
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284 | ptr->gmrId = bo->mem.start; |
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285 | ptr->offset = 0; |
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286 | } |
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287 | } |
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288 | |||
289 | |||
290 | /** |
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291 | * vmw_bo_pin - Pin or unpin a buffer object without moving it. |
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292 | * |
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4569 | Serge | 293 | * @bo: The buffer object. Must be reserved. |
4075 | Serge | 294 | * @pin: Whether to pin or unpin. |
295 | * |
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296 | */ |
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297 | void vmw_bo_pin(struct ttm_buffer_object *bo, bool pin) |
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298 | { |
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299 | uint32_t pl_flags; |
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300 | struct ttm_placement placement; |
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301 | uint32_t old_mem_type = bo->mem.mem_type; |
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302 | int ret; |
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303 | |||
304 | lockdep_assert_held(&bo->resv->lock.base); |
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305 | |||
4569 | Serge | 306 | pl_flags = TTM_PL_FLAG_VRAM | VMW_PL_FLAG_GMR | VMW_PL_FLAG_MOB |
307 | | TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; |
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4075 | Serge | 308 | if (pin) |
309 | pl_flags |= TTM_PL_FLAG_NO_EVICT; |
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310 | |||
311 | memset(&placement, 0, sizeof(placement)); |
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312 | placement.num_placement = 1; |
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313 | placement.placement = &pl_flags; |
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314 | |||
315 | ret = ttm_bo_validate(bo, &placement, false, true); |
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316 | |||
317 | BUG_ON(ret != 0 || bo->mem.mem_type != old_mem_type); |
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318 | }> |