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Rev | Author | Line No. | Line |
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4075 | Serge | 1 | /************************************************************************** |
2 | * |
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3 | * Copyright © 2009 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 "vmwgfx_drv.h" |
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29 | #include |
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30 | #include |
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31 | #include |
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32 | #include |
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33 | #include "vmwgfx_resource_priv.h" |
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34 | |||
4569 | Serge | 35 | #define VMW_RES_EVICT_ERR_COUNT 10 |
36 | |||
4075 | Serge | 37 | struct vmw_user_dma_buffer { |
4569 | Serge | 38 | struct ttm_prime_object prime; |
4075 | Serge | 39 | struct vmw_dma_buffer dma; |
40 | }; |
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41 | |||
42 | struct vmw_bo_user_rep { |
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43 | uint32_t handle; |
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44 | uint64_t map_handle; |
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45 | }; |
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46 | |||
47 | struct vmw_stream { |
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48 | struct vmw_resource res; |
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49 | uint32_t stream_id; |
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50 | }; |
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51 | |||
52 | struct vmw_user_stream { |
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53 | struct ttm_base_object base; |
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54 | struct vmw_stream stream; |
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55 | }; |
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56 | |||
57 | |||
58 | static uint64_t vmw_user_stream_size; |
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59 | |||
60 | static const struct vmw_res_func vmw_stream_func = { |
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61 | .res_type = vmw_res_stream, |
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62 | .needs_backup = false, |
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63 | .may_evict = false, |
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64 | .type_name = "video streams", |
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65 | .backup_placement = NULL, |
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66 | .create = NULL, |
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67 | .destroy = NULL, |
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68 | .bind = NULL, |
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69 | .unbind = NULL |
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70 | }; |
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71 | |||
72 | static inline struct vmw_dma_buffer * |
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73 | vmw_dma_buffer(struct ttm_buffer_object *bo) |
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74 | { |
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75 | return container_of(bo, struct vmw_dma_buffer, base); |
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76 | } |
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77 | |||
78 | static inline struct vmw_user_dma_buffer * |
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79 | vmw_user_dma_buffer(struct ttm_buffer_object *bo) |
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80 | { |
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81 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); |
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82 | return container_of(vmw_bo, struct vmw_user_dma_buffer, dma); |
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83 | } |
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84 | |||
85 | struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) |
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86 | { |
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87 | kref_get(&res->kref); |
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88 | return res; |
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89 | } |
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90 | |||
91 | |||
92 | /** |
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93 | * vmw_resource_release_id - release a resource id to the id manager. |
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94 | * |
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95 | * @res: Pointer to the resource. |
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96 | * |
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97 | * Release the resource id to the resource id manager and set it to -1 |
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98 | */ |
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99 | void vmw_resource_release_id(struct vmw_resource *res) |
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100 | { |
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101 | struct vmw_private *dev_priv = res->dev_priv; |
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102 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
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103 | |||
104 | write_lock(&dev_priv->resource_lock); |
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105 | if (res->id != -1) |
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106 | idr_remove(idr, res->id); |
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107 | res->id = -1; |
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108 | write_unlock(&dev_priv->resource_lock); |
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109 | } |
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110 | |||
111 | static void vmw_resource_release(struct kref *kref) |
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112 | { |
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113 | struct vmw_resource *res = |
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114 | container_of(kref, struct vmw_resource, kref); |
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115 | struct vmw_private *dev_priv = res->dev_priv; |
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116 | int id; |
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117 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
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118 | |||
119 | res->avail = false; |
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120 | list_del_init(&res->lru_head); |
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121 | write_unlock(&dev_priv->resource_lock); |
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122 | if (res->backup) { |
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123 | struct ttm_buffer_object *bo = &res->backup->base; |
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124 | |||
125 | ttm_bo_reserve(bo, false, false, false, 0); |
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126 | if (!list_empty(&res->mob_head) && |
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127 | res->func->unbind != NULL) { |
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128 | struct ttm_validate_buffer val_buf; |
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129 | |||
130 | val_buf.bo = bo; |
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131 | res->func->unbind(res, false, &val_buf); |
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132 | } |
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133 | res->backup_dirty = false; |
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134 | list_del_init(&res->mob_head); |
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135 | ttm_bo_unreserve(bo); |
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136 | vmw_dmabuf_unreference(&res->backup); |
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137 | } |
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138 | |||
139 | if (likely(res->hw_destroy != NULL)) |
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140 | res->hw_destroy(res); |
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141 | |||
142 | id = res->id; |
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143 | if (res->res_free != NULL) |
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144 | res->res_free(res); |
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145 | else |
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146 | kfree(res); |
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147 | |||
148 | write_lock(&dev_priv->resource_lock); |
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149 | |||
150 | if (id != -1) |
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151 | idr_remove(idr, id); |
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152 | } |
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153 | |||
154 | void vmw_resource_unreference(struct vmw_resource **p_res) |
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155 | { |
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156 | struct vmw_resource *res = *p_res; |
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157 | struct vmw_private *dev_priv = res->dev_priv; |
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158 | |||
159 | *p_res = NULL; |
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160 | write_lock(&dev_priv->resource_lock); |
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161 | kref_put(&res->kref, vmw_resource_release); |
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162 | write_unlock(&dev_priv->resource_lock); |
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163 | } |
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164 | |||
165 | |||
166 | /** |
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167 | * vmw_resource_alloc_id - release a resource id to the id manager. |
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168 | * |
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169 | * @res: Pointer to the resource. |
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170 | * |
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171 | * Allocate the lowest free resource from the resource manager, and set |
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172 | * @res->id to that id. Returns 0 on success and -ENOMEM on failure. |
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173 | */ |
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174 | int vmw_resource_alloc_id(struct vmw_resource *res) |
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175 | { |
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176 | struct vmw_private *dev_priv = res->dev_priv; |
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177 | int ret; |
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178 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
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179 | |||
180 | BUG_ON(res->id != -1); |
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181 | |||
182 | idr_preload(GFP_KERNEL); |
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183 | write_lock(&dev_priv->resource_lock); |
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184 | |||
185 | ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT); |
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186 | if (ret >= 0) |
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187 | res->id = ret; |
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188 | |||
189 | write_unlock(&dev_priv->resource_lock); |
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190 | idr_preload_end(); |
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191 | return ret < 0 ? ret : 0; |
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192 | } |
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193 | |||
194 | /** |
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195 | * vmw_resource_init - initialize a struct vmw_resource |
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196 | * |
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197 | * @dev_priv: Pointer to a device private struct. |
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198 | * @res: The struct vmw_resource to initialize. |
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199 | * @obj_type: Resource object type. |
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200 | * @delay_id: Boolean whether to defer device id allocation until |
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201 | * the first validation. |
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202 | * @res_free: Resource destructor. |
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203 | * @func: Resource function table. |
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204 | */ |
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205 | int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res, |
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206 | bool delay_id, |
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207 | void (*res_free) (struct vmw_resource *res), |
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208 | const struct vmw_res_func *func) |
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209 | { |
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210 | kref_init(&res->kref); |
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211 | res->hw_destroy = NULL; |
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212 | res->res_free = res_free; |
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213 | res->avail = false; |
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214 | res->dev_priv = dev_priv; |
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215 | res->func = func; |
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216 | INIT_LIST_HEAD(&res->lru_head); |
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217 | INIT_LIST_HEAD(&res->mob_head); |
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4569 | Serge | 218 | INIT_LIST_HEAD(&res->binding_head); |
4075 | Serge | 219 | res->id = -1; |
220 | res->backup = NULL; |
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221 | res->backup_offset = 0; |
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222 | res->backup_dirty = false; |
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223 | res->res_dirty = false; |
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224 | if (delay_id) |
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225 | return 0; |
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226 | else |
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227 | return vmw_resource_alloc_id(res); |
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228 | } |
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229 | |||
230 | /** |
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231 | * vmw_resource_activate |
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232 | * |
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233 | * @res: Pointer to the newly created resource |
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234 | * @hw_destroy: Destroy function. NULL if none. |
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235 | * |
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236 | * Activate a resource after the hardware has been made aware of it. |
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237 | * Set tye destroy function to @destroy. Typically this frees the |
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238 | * resource and destroys the hardware resources associated with it. |
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239 | * Activate basically means that the function vmw_resource_lookup will |
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240 | * find it. |
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241 | */ |
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242 | void vmw_resource_activate(struct vmw_resource *res, |
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243 | void (*hw_destroy) (struct vmw_resource *)) |
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244 | { |
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245 | struct vmw_private *dev_priv = res->dev_priv; |
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246 | |||
247 | write_lock(&dev_priv->resource_lock); |
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248 | res->avail = true; |
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249 | res->hw_destroy = hw_destroy; |
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250 | write_unlock(&dev_priv->resource_lock); |
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251 | } |
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252 | |||
253 | struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv, |
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254 | struct idr *idr, int id) |
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255 | { |
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256 | struct vmw_resource *res; |
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257 | |||
258 | read_lock(&dev_priv->resource_lock); |
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259 | res = idr_find(idr, id); |
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260 | if (res && res->avail) |
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261 | kref_get(&res->kref); |
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262 | else |
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263 | res = NULL; |
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264 | read_unlock(&dev_priv->resource_lock); |
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265 | |||
266 | if (unlikely(res == NULL)) |
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267 | return NULL; |
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268 | |||
269 | return res; |
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270 | } |
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271 | |||
272 | /** |
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273 | * vmw_user_resource_lookup_handle - lookup a struct resource from a |
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274 | * TTM user-space handle and perform basic type checks |
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275 | * |
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276 | * @dev_priv: Pointer to a device private struct |
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277 | * @tfile: Pointer to a struct ttm_object_file identifying the caller |
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278 | * @handle: The TTM user-space handle |
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279 | * @converter: Pointer to an object describing the resource type |
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280 | * @p_res: On successful return the location pointed to will contain |
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281 | * a pointer to a refcounted struct vmw_resource. |
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282 | * |
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283 | * If the handle can't be found or is associated with an incorrect resource |
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284 | * type, -EINVAL will be returned. |
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285 | */ |
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286 | int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv, |
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287 | struct ttm_object_file *tfile, |
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288 | uint32_t handle, |
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289 | const struct vmw_user_resource_conv |
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290 | *converter, |
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291 | struct vmw_resource **p_res) |
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292 | { |
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293 | struct ttm_base_object *base; |
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294 | struct vmw_resource *res; |
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295 | int ret = -EINVAL; |
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296 | |||
297 | base = ttm_base_object_lookup(tfile, handle); |
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298 | if (unlikely(base == NULL)) |
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299 | return -EINVAL; |
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300 | |||
4569 | Serge | 301 | if (unlikely(ttm_base_object_type(base) != converter->object_type)) |
4075 | Serge | 302 | goto out_bad_resource; |
303 | |||
304 | res = converter->base_obj_to_res(base); |
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305 | |||
306 | read_lock(&dev_priv->resource_lock); |
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307 | if (!res->avail || res->res_free != converter->res_free) { |
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308 | read_unlock(&dev_priv->resource_lock); |
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309 | goto out_bad_resource; |
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310 | } |
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311 | |||
312 | kref_get(&res->kref); |
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313 | read_unlock(&dev_priv->resource_lock); |
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314 | |||
315 | *p_res = res; |
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316 | ret = 0; |
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317 | |||
318 | out_bad_resource: |
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319 | ttm_base_object_unref(&base); |
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320 | |||
321 | return ret; |
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322 | } |
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323 | |||
324 | /** |
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325 | * Helper function that looks either a surface or dmabuf. |
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326 | * |
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327 | * The pointer this pointed at by out_surf and out_buf needs to be null. |
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328 | */ |
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329 | int vmw_user_lookup_handle(struct vmw_private *dev_priv, |
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330 | struct ttm_object_file *tfile, |
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331 | uint32_t handle, |
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332 | struct vmw_surface **out_surf, |
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333 | struct vmw_dma_buffer **out_buf) |
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334 | { |
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335 | struct vmw_resource *res; |
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336 | int ret; |
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337 | |||
338 | BUG_ON(*out_surf || *out_buf); |
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339 | |||
340 | ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle, |
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341 | user_surface_converter, |
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342 | &res); |
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343 | if (!ret) { |
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344 | *out_surf = vmw_res_to_srf(res); |
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345 | return 0; |
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346 | } |
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347 | |||
348 | *out_surf = NULL; |
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349 | ret = vmw_user_dmabuf_lookup(tfile, handle, out_buf); |
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350 | return ret; |
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351 | } |
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352 | |||
353 | /** |
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354 | * Buffer management. |
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355 | */ |
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4569 | Serge | 356 | |
357 | /** |
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358 | * vmw_dmabuf_acc_size - Calculate the pinned memory usage of buffers |
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359 | * |
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360 | * @dev_priv: Pointer to a struct vmw_private identifying the device. |
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361 | * @size: The requested buffer size. |
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362 | * @user: Whether this is an ordinary dma buffer or a user dma buffer. |
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363 | */ |
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364 | static size_t vmw_dmabuf_acc_size(struct vmw_private *dev_priv, size_t size, |
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365 | bool user) |
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366 | { |
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367 | static size_t struct_size, user_struct_size; |
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368 | size_t num_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; |
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369 | size_t page_array_size = ttm_round_pot(num_pages * sizeof(void *)); |
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370 | |||
371 | if (unlikely(struct_size == 0)) { |
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372 | size_t backend_size = ttm_round_pot(vmw_tt_size); |
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373 | |||
374 | struct_size = backend_size + |
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375 | ttm_round_pot(sizeof(struct vmw_dma_buffer)); |
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376 | user_struct_size = backend_size + |
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377 | ttm_round_pot(sizeof(struct vmw_user_dma_buffer)); |
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378 | } |
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379 | |||
380 | if (dev_priv->map_mode == vmw_dma_alloc_coherent) |
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381 | page_array_size += |
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382 | ttm_round_pot(num_pages * sizeof(dma_addr_t)); |
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383 | |||
384 | return ((user) ? user_struct_size : struct_size) + |
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385 | page_array_size; |
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386 | } |
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387 | |||
4075 | Serge | 388 | void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo) |
389 | { |
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390 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); |
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391 | |||
392 | kfree(vmw_bo); |
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393 | } |
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394 | |||
4569 | Serge | 395 | static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo) |
396 | { |
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397 | struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo); |
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398 | |||
399 | // ttm_prime_object_kfree(vmw_user_bo, prime); |
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400 | } |
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401 | |||
4075 | Serge | 402 | int vmw_dmabuf_init(struct vmw_private *dev_priv, |
403 | struct vmw_dma_buffer *vmw_bo, |
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404 | size_t size, struct ttm_placement *placement, |
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405 | bool interruptible, |
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406 | void (*bo_free) (struct ttm_buffer_object *bo)) |
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407 | { |
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408 | struct ttm_bo_device *bdev = &dev_priv->bdev; |
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409 | size_t acc_size; |
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410 | int ret; |
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4569 | Serge | 411 | bool user = (bo_free == &vmw_user_dmabuf_destroy); |
4075 | Serge | 412 | |
4569 | Serge | 413 | BUG_ON(!bo_free && (!user && (bo_free != vmw_dmabuf_bo_free))); |
4075 | Serge | 414 | |
4569 | Serge | 415 | acc_size = vmw_dmabuf_acc_size(dev_priv, size, user); |
4075 | Serge | 416 | memset(vmw_bo, 0, sizeof(*vmw_bo)); |
417 | |||
418 | INIT_LIST_HEAD(&vmw_bo->res_list); |
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419 | |||
420 | ret = ttm_bo_init(bdev, &vmw_bo->base, size, |
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4569 | Serge | 421 | (user) ? ttm_bo_type_device : |
422 | ttm_bo_type_kernel, placement, |
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4075 | Serge | 423 | 0, interruptible, |
424 | NULL, acc_size, NULL, bo_free); |
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425 | return ret; |
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426 | } |
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427 | |||
428 | static void vmw_user_dmabuf_release(struct ttm_base_object **p_base) |
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429 | { |
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430 | struct vmw_user_dma_buffer *vmw_user_bo; |
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431 | struct ttm_base_object *base = *p_base; |
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432 | struct ttm_buffer_object *bo; |
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433 | |||
434 | *p_base = NULL; |
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435 | |||
436 | if (unlikely(base == NULL)) |
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437 | return; |
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438 | |||
4569 | Serge | 439 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, |
440 | prime.base); |
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4075 | Serge | 441 | bo = &vmw_user_bo->dma.base; |
442 | ttm_bo_unref(&bo); |
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443 | } |
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444 | |||
4569 | Serge | 445 | static void vmw_user_dmabuf_ref_obj_release(struct ttm_base_object *base, |
446 | enum ttm_ref_type ref_type) |
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447 | { |
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448 | struct vmw_user_dma_buffer *user_bo; |
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449 | user_bo = container_of(base, struct vmw_user_dma_buffer, prime.base); |
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450 | |||
451 | switch (ref_type) { |
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452 | case TTM_REF_SYNCCPU_WRITE: |
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453 | ttm_bo_synccpu_write_release(&user_bo->dma.base); |
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454 | break; |
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455 | default: |
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456 | BUG(); |
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457 | } |
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458 | } |
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459 | |||
4075 | Serge | 460 | /** |
461 | * vmw_user_dmabuf_alloc - Allocate a user dma buffer |
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462 | * |
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463 | * @dev_priv: Pointer to a struct device private. |
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464 | * @tfile: Pointer to a struct ttm_object_file on which to register the user |
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465 | * object. |
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466 | * @size: Size of the dma buffer. |
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467 | * @shareable: Boolean whether the buffer is shareable with other open files. |
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468 | * @handle: Pointer to where the handle value should be assigned. |
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469 | * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer |
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470 | * should be assigned. |
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471 | */ |
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472 | int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv, |
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473 | struct ttm_object_file *tfile, |
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474 | uint32_t size, |
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475 | bool shareable, |
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476 | uint32_t *handle, |
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477 | struct vmw_dma_buffer **p_dma_buf) |
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478 | { |
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479 | struct vmw_user_dma_buffer *user_bo; |
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480 | struct ttm_buffer_object *tmp; |
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481 | int ret; |
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482 | |||
483 | user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL); |
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484 | if (unlikely(user_bo == NULL)) { |
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485 | DRM_ERROR("Failed to allocate a buffer.\n"); |
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486 | return -ENOMEM; |
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487 | } |
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488 | |||
489 | ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size, |
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4569 | Serge | 490 | (dev_priv->has_mob) ? |
491 | &vmw_sys_placement : |
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4075 | Serge | 492 | &vmw_vram_sys_placement, true, |
493 | &vmw_user_dmabuf_destroy); |
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494 | if (unlikely(ret != 0)) |
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495 | return ret; |
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496 | |||
497 | tmp = ttm_bo_reference(&user_bo->dma.base); |
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4569 | Serge | 498 | /* |
499 | ret = ttm_prime_object_init(tfile, |
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500 | size, |
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501 | &user_bo->prime, |
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4075 | Serge | 502 | shareable, |
503 | ttm_buffer_type, |
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4569 | Serge | 504 | &vmw_user_dmabuf_release, |
505 | &vmw_user_dmabuf_ref_obj_release); |
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4075 | Serge | 506 | if (unlikely(ret != 0)) { |
507 | ttm_bo_unref(&tmp); |
||
508 | goto out_no_base_object; |
||
509 | } |
||
4569 | Serge | 510 | */ |
4075 | Serge | 511 | |
512 | *p_dma_buf = &user_bo->dma; |
||
4569 | Serge | 513 | *handle = user_bo->prime.base.hash.key; |
4075 | Serge | 514 | |
515 | out_no_base_object: |
||
516 | return ret; |
||
517 | } |
||
518 | |||
519 | /** |
||
520 | * vmw_user_dmabuf_verify_access - verify access permissions on this |
||
521 | * buffer object. |
||
522 | * |
||
523 | * @bo: Pointer to the buffer object being accessed |
||
524 | * @tfile: Identifying the caller. |
||
525 | */ |
||
526 | int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo, |
||
527 | struct ttm_object_file *tfile) |
||
528 | { |
||
529 | struct vmw_user_dma_buffer *vmw_user_bo; |
||
530 | |||
531 | if (unlikely(bo->destroy != vmw_user_dmabuf_destroy)) |
||
532 | return -EPERM; |
||
533 | |||
534 | vmw_user_bo = vmw_user_dma_buffer(bo); |
||
4569 | Serge | 535 | return (vmw_user_bo->prime.base.tfile == tfile || |
536 | vmw_user_bo->prime.base.shareable) ? 0 : -EPERM; |
||
4075 | Serge | 537 | } |
538 | |||
4569 | Serge | 539 | /** |
540 | * vmw_user_dmabuf_synccpu_grab - Grab a struct vmw_user_dma_buffer for cpu |
||
541 | * access, idling previous GPU operations on the buffer and optionally |
||
542 | * blocking it for further command submissions. |
||
543 | * |
||
544 | * @user_bo: Pointer to the buffer object being grabbed for CPU access |
||
545 | * @tfile: Identifying the caller. |
||
546 | * @flags: Flags indicating how the grab should be performed. |
||
547 | * |
||
548 | * A blocking grab will be automatically released when @tfile is closed. |
||
549 | */ |
||
550 | static int vmw_user_dmabuf_synccpu_grab(struct vmw_user_dma_buffer *user_bo, |
||
551 | struct ttm_object_file *tfile, |
||
552 | uint32_t flags) |
||
553 | { |
||
554 | struct ttm_buffer_object *bo = &user_bo->dma.base; |
||
555 | bool existed; |
||
556 | int ret=0; |
||
557 | |||
558 | if (flags & drm_vmw_synccpu_allow_cs) { |
||
559 | struct ttm_bo_device *bdev = bo->bdev; |
||
560 | |||
561 | // spin_lock(&bdev->fence_lock); |
||
562 | // ret = ttm_bo_wait(bo, false, true, |
||
563 | // !!(flags & drm_vmw_synccpu_dontblock)); |
||
564 | // spin_unlock(&bdev->fence_lock); |
||
565 | return ret; |
||
566 | } |
||
567 | |||
568 | // ret = ttm_bo_synccpu_write_grab |
||
569 | // (bo, !!(flags & drm_vmw_synccpu_dontblock)); |
||
570 | // if (unlikely(ret != 0)) |
||
571 | // return ret; |
||
572 | |||
573 | ret = ttm_ref_object_add(tfile, &user_bo->prime.base, |
||
574 | TTM_REF_SYNCCPU_WRITE, &existed); |
||
575 | // if (ret != 0 || existed) |
||
576 | // ttm_bo_synccpu_write_release(&user_bo->dma.base); |
||
577 | |||
578 | return ret; |
||
579 | } |
||
580 | |||
581 | /** |
||
582 | * vmw_user_dmabuf_synccpu_release - Release a previous grab for CPU access, |
||
583 | * and unblock command submission on the buffer if blocked. |
||
584 | * |
||
585 | * @handle: Handle identifying the buffer object. |
||
586 | * @tfile: Identifying the caller. |
||
587 | * @flags: Flags indicating the type of release. |
||
588 | */ |
||
589 | static int vmw_user_dmabuf_synccpu_release(uint32_t handle, |
||
590 | struct ttm_object_file *tfile, |
||
591 | uint32_t flags) |
||
592 | { |
||
593 | if (!(flags & drm_vmw_synccpu_allow_cs)) |
||
594 | return ttm_ref_object_base_unref(tfile, handle, |
||
595 | TTM_REF_SYNCCPU_WRITE); |
||
596 | |||
597 | return 0; |
||
598 | } |
||
599 | |||
600 | /** |
||
601 | * vmw_user_dmabuf_synccpu_release - ioctl function implementing the synccpu |
||
602 | * functionality. |
||
603 | * |
||
604 | * @dev: Identifies the drm device. |
||
605 | * @data: Pointer to the ioctl argument. |
||
606 | * @file_priv: Identifies the caller. |
||
607 | * |
||
608 | * This function checks the ioctl arguments for validity and calls the |
||
609 | * relevant synccpu functions. |
||
610 | */ |
||
611 | int vmw_user_dmabuf_synccpu_ioctl(struct drm_device *dev, void *data, |
||
612 | struct drm_file *file_priv) |
||
613 | { |
||
614 | struct drm_vmw_synccpu_arg *arg = |
||
615 | (struct drm_vmw_synccpu_arg *) data; |
||
616 | struct vmw_dma_buffer *dma_buf; |
||
617 | struct vmw_user_dma_buffer *user_bo; |
||
618 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
||
619 | int ret; |
||
620 | |||
621 | if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0 |
||
622 | || (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write | |
||
623 | drm_vmw_synccpu_dontblock | |
||
624 | drm_vmw_synccpu_allow_cs)) != 0) { |
||
625 | DRM_ERROR("Illegal synccpu flags.\n"); |
||
626 | return -EINVAL; |
||
627 | } |
||
628 | |||
629 | switch (arg->op) { |
||
630 | case drm_vmw_synccpu_grab: |
||
631 | ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &dma_buf); |
||
632 | if (unlikely(ret != 0)) |
||
633 | return ret; |
||
634 | |||
635 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, |
||
636 | dma); |
||
637 | ret = vmw_user_dmabuf_synccpu_grab(user_bo, tfile, arg->flags); |
||
638 | vmw_dmabuf_unreference(&dma_buf); |
||
639 | if (unlikely(ret != 0 && ret != -ERESTARTSYS && |
||
640 | ret != -EBUSY)) { |
||
641 | DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n", |
||
642 | (unsigned int) arg->handle); |
||
643 | return ret; |
||
644 | } |
||
645 | break; |
||
646 | case drm_vmw_synccpu_release: |
||
647 | ret = vmw_user_dmabuf_synccpu_release(arg->handle, tfile, |
||
648 | arg->flags); |
||
649 | if (unlikely(ret != 0)) { |
||
650 | DRM_ERROR("Failed synccpu release on handle 0x%08x.\n", |
||
651 | (unsigned int) arg->handle); |
||
652 | return ret; |
||
653 | } |
||
654 | break; |
||
655 | default: |
||
656 | DRM_ERROR("Invalid synccpu operation.\n"); |
||
657 | return -EINVAL; |
||
658 | } |
||
659 | |||
660 | return 0; |
||
661 | } |
||
662 | |||
4075 | Serge | 663 | #if 0 |
664 | int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data, |
||
665 | struct drm_file *file_priv) |
||
666 | { |
||
667 | struct vmw_private *dev_priv = vmw_priv(dev); |
||
668 | union drm_vmw_alloc_dmabuf_arg *arg = |
||
669 | (union drm_vmw_alloc_dmabuf_arg *)data; |
||
670 | struct drm_vmw_alloc_dmabuf_req *req = &arg->req; |
||
671 | struct drm_vmw_dmabuf_rep *rep = &arg->rep; |
||
672 | struct vmw_dma_buffer *dma_buf; |
||
673 | uint32_t handle; |
||
674 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
||
675 | int ret; |
||
676 | |||
677 | ret = ttm_read_lock(&vmaster->lock, true); |
||
678 | if (unlikely(ret != 0)) |
||
679 | return ret; |
||
680 | |||
681 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
||
682 | req->size, false, &handle, &dma_buf); |
||
683 | if (unlikely(ret != 0)) |
||
684 | goto out_no_dmabuf; |
||
685 | |||
686 | rep->handle = handle; |
||
4111 | Serge | 687 | rep->map_handle = drm_vma_node_offset_addr(&dma_buf->base.vma_node); |
4075 | Serge | 688 | rep->cur_gmr_id = handle; |
689 | rep->cur_gmr_offset = 0; |
||
690 | |||
691 | vmw_dmabuf_unreference(&dma_buf); |
||
692 | |||
693 | out_no_dmabuf: |
||
694 | ttm_read_unlock(&vmaster->lock); |
||
695 | |||
696 | return ret; |
||
697 | } |
||
698 | |||
699 | int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data, |
||
700 | struct drm_file *file_priv) |
||
701 | { |
||
702 | struct drm_vmw_unref_dmabuf_arg *arg = |
||
703 | (struct drm_vmw_unref_dmabuf_arg *)data; |
||
704 | |||
705 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, |
||
706 | arg->handle, |
||
707 | TTM_REF_USAGE); |
||
708 | } |
||
709 | #endif |
||
710 | |||
711 | int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile, |
||
712 | uint32_t handle, struct vmw_dma_buffer **out) |
||
713 | { |
||
714 | struct vmw_user_dma_buffer *vmw_user_bo; |
||
715 | struct ttm_base_object *base; |
||
716 | |||
717 | base = ttm_base_object_lookup(tfile, handle); |
||
718 | if (unlikely(base == NULL)) { |
||
719 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", |
||
720 | (unsigned long)handle); |
||
721 | return -ESRCH; |
||
722 | } |
||
723 | |||
4569 | Serge | 724 | if (unlikely(ttm_base_object_type(base) != ttm_buffer_type)) { |
4075 | Serge | 725 | ttm_base_object_unref(&base); |
726 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", |
||
727 | (unsigned long)handle); |
||
728 | return -EINVAL; |
||
729 | } |
||
730 | |||
4569 | Serge | 731 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, |
732 | prime.base); |
||
4075 | Serge | 733 | (void)ttm_bo_reference(&vmw_user_bo->dma.base); |
734 | ttm_base_object_unref(&base); |
||
735 | *out = &vmw_user_bo->dma; |
||
736 | |||
737 | return 0; |
||
738 | } |
||
739 | |||
740 | int vmw_user_dmabuf_reference(struct ttm_object_file *tfile, |
||
4569 | Serge | 741 | struct vmw_dma_buffer *dma_buf, |
742 | uint32_t *handle) |
||
4075 | Serge | 743 | { |
744 | struct vmw_user_dma_buffer *user_bo; |
||
745 | |||
746 | if (dma_buf->base.destroy != vmw_user_dmabuf_destroy) |
||
747 | return -EINVAL; |
||
748 | |||
749 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma); |
||
4569 | Serge | 750 | |
751 | *handle = user_bo->prime.base.hash.key; |
||
752 | return ttm_ref_object_add(tfile, &user_bo->prime.base, |
||
753 | TTM_REF_USAGE, NULL); |
||
4075 | Serge | 754 | } |
755 | |||
756 | /* |
||
757 | * Stream management |
||
758 | */ |
||
759 | |||
760 | static void vmw_stream_destroy(struct vmw_resource *res) |
||
761 | { |
||
762 | struct vmw_private *dev_priv = res->dev_priv; |
||
763 | struct vmw_stream *stream; |
||
764 | int ret; |
||
765 | |||
766 | DRM_INFO("%s: unref\n", __func__); |
||
767 | stream = container_of(res, struct vmw_stream, res); |
||
768 | |||
769 | ret = vmw_overlay_unref(dev_priv, stream->stream_id); |
||
770 | WARN_ON(ret != 0); |
||
771 | } |
||
772 | |||
773 | static int vmw_stream_init(struct vmw_private *dev_priv, |
||
774 | struct vmw_stream *stream, |
||
775 | void (*res_free) (struct vmw_resource *res)) |
||
776 | { |
||
777 | struct vmw_resource *res = &stream->res; |
||
778 | int ret; |
||
779 | |||
780 | ret = vmw_resource_init(dev_priv, res, false, res_free, |
||
781 | &vmw_stream_func); |
||
782 | |||
783 | if (unlikely(ret != 0)) { |
||
784 | if (res_free == NULL) |
||
785 | kfree(stream); |
||
786 | else |
||
787 | res_free(&stream->res); |
||
788 | return ret; |
||
789 | } |
||
790 | |||
791 | ret = vmw_overlay_claim(dev_priv, &stream->stream_id); |
||
792 | if (ret) { |
||
793 | vmw_resource_unreference(&res); |
||
794 | return ret; |
||
795 | } |
||
796 | |||
797 | DRM_INFO("%s: claimed\n", __func__); |
||
798 | |||
799 | vmw_resource_activate(&stream->res, vmw_stream_destroy); |
||
800 | return 0; |
||
801 | } |
||
802 | |||
803 | static void vmw_user_stream_free(struct vmw_resource *res) |
||
804 | { |
||
805 | struct vmw_user_stream *stream = |
||
806 | container_of(res, struct vmw_user_stream, stream.res); |
||
807 | struct vmw_private *dev_priv = res->dev_priv; |
||
808 | |||
809 | // ttm_base_object_kfree(stream, base); |
||
810 | ttm_mem_global_free(vmw_mem_glob(dev_priv), |
||
811 | vmw_user_stream_size); |
||
812 | } |
||
813 | |||
814 | /** |
||
815 | * This function is called when user space has no more references on the |
||
816 | * base object. It releases the base-object's reference on the resource object. |
||
817 | */ |
||
818 | |||
819 | static void vmw_user_stream_base_release(struct ttm_base_object **p_base) |
||
820 | { |
||
821 | struct ttm_base_object *base = *p_base; |
||
822 | struct vmw_user_stream *stream = |
||
823 | container_of(base, struct vmw_user_stream, base); |
||
824 | struct vmw_resource *res = &stream->stream.res; |
||
825 | |||
826 | *p_base = NULL; |
||
827 | vmw_resource_unreference(&res); |
||
828 | } |
||
829 | |||
830 | #if 0 |
||
831 | int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, |
||
832 | struct drm_file *file_priv) |
||
833 | { |
||
834 | struct vmw_private *dev_priv = vmw_priv(dev); |
||
835 | struct vmw_resource *res; |
||
836 | struct vmw_user_stream *stream; |
||
837 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; |
||
838 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
||
839 | struct idr *idr = &dev_priv->res_idr[vmw_res_stream]; |
||
840 | int ret = 0; |
||
841 | |||
842 | |||
843 | res = vmw_resource_lookup(dev_priv, idr, arg->stream_id); |
||
844 | if (unlikely(res == NULL)) |
||
845 | return -EINVAL; |
||
846 | |||
847 | if (res->res_free != &vmw_user_stream_free) { |
||
848 | ret = -EINVAL; |
||
849 | goto out; |
||
850 | } |
||
851 | |||
852 | stream = container_of(res, struct vmw_user_stream, stream.res); |
||
853 | if (stream->base.tfile != tfile) { |
||
854 | ret = -EINVAL; |
||
855 | goto out; |
||
856 | } |
||
857 | |||
858 | ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE); |
||
859 | out: |
||
860 | vmw_resource_unreference(&res); |
||
861 | return ret; |
||
862 | } |
||
863 | |||
864 | int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, |
||
865 | struct drm_file *file_priv) |
||
866 | { |
||
867 | struct vmw_private *dev_priv = vmw_priv(dev); |
||
868 | struct vmw_user_stream *stream; |
||
869 | struct vmw_resource *res; |
||
870 | struct vmw_resource *tmp; |
||
871 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; |
||
872 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
||
873 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
||
874 | int ret; |
||
875 | |||
876 | /* |
||
877 | * Approximate idr memory usage with 128 bytes. It will be limited |
||
878 | * by maximum number_of streams anyway? |
||
879 | */ |
||
880 | |||
881 | if (unlikely(vmw_user_stream_size == 0)) |
||
882 | vmw_user_stream_size = ttm_round_pot(sizeof(*stream)) + 128; |
||
883 | |||
884 | ret = ttm_read_lock(&vmaster->lock, true); |
||
885 | if (unlikely(ret != 0)) |
||
886 | return ret; |
||
887 | |||
888 | ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), |
||
889 | vmw_user_stream_size, |
||
890 | false, true); |
||
891 | if (unlikely(ret != 0)) { |
||
892 | if (ret != -ERESTARTSYS) |
||
893 | DRM_ERROR("Out of graphics memory for stream" |
||
894 | " creation.\n"); |
||
895 | goto out_unlock; |
||
896 | } |
||
897 | |||
898 | |||
899 | stream = kmalloc(sizeof(*stream), GFP_KERNEL); |
||
900 | if (unlikely(stream == NULL)) { |
||
901 | ttm_mem_global_free(vmw_mem_glob(dev_priv), |
||
902 | vmw_user_stream_size); |
||
903 | ret = -ENOMEM; |
||
904 | goto out_unlock; |
||
905 | } |
||
906 | |||
907 | res = &stream->stream.res; |
||
908 | stream->base.shareable = false; |
||
909 | stream->base.tfile = NULL; |
||
910 | |||
911 | /* |
||
912 | * From here on, the destructor takes over resource freeing. |
||
913 | */ |
||
914 | |||
915 | ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free); |
||
916 | if (unlikely(ret != 0)) |
||
917 | goto out_unlock; |
||
918 | |||
919 | tmp = vmw_resource_reference(res); |
||
920 | ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM, |
||
921 | &vmw_user_stream_base_release, NULL); |
||
922 | |||
923 | if (unlikely(ret != 0)) { |
||
924 | vmw_resource_unreference(&tmp); |
||
925 | goto out_err; |
||
926 | } |
||
927 | |||
928 | arg->stream_id = res->id; |
||
929 | out_err: |
||
930 | vmw_resource_unreference(&res); |
||
931 | out_unlock: |
||
932 | ttm_read_unlock(&vmaster->lock); |
||
933 | return ret; |
||
934 | } |
||
935 | #endif |
||
936 | |||
937 | int vmw_user_stream_lookup(struct vmw_private *dev_priv, |
||
938 | struct ttm_object_file *tfile, |
||
939 | uint32_t *inout_id, struct vmw_resource **out) |
||
940 | { |
||
941 | struct vmw_user_stream *stream; |
||
942 | struct vmw_resource *res; |
||
943 | int ret; |
||
944 | |||
945 | res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream], |
||
946 | *inout_id); |
||
947 | if (unlikely(res == NULL)) |
||
948 | return -EINVAL; |
||
949 | |||
950 | if (res->res_free != &vmw_user_stream_free) { |
||
951 | ret = -EINVAL; |
||
952 | goto err_ref; |
||
953 | } |
||
954 | |||
955 | stream = container_of(res, struct vmw_user_stream, stream.res); |
||
956 | if (stream->base.tfile != tfile) { |
||
957 | ret = -EPERM; |
||
958 | goto err_ref; |
||
959 | } |
||
960 | |||
961 | *inout_id = stream->stream.stream_id; |
||
962 | *out = res; |
||
963 | return 0; |
||
964 | err_ref: |
||
965 | vmw_resource_unreference(&res); |
||
966 | return ret; |
||
967 | } |
||
968 | |||
969 | #if 0 |
||
970 | int vmw_dumb_create(struct drm_file *file_priv, |
||
971 | struct drm_device *dev, |
||
972 | struct drm_mode_create_dumb *args) |
||
973 | { |
||
974 | struct vmw_private *dev_priv = vmw_priv(dev); |
||
975 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
||
4569 | Serge | 976 | struct vmw_dma_buffer *dma_buf; |
4075 | Serge | 977 | int ret; |
978 | |||
979 | args->pitch = args->width * ((args->bpp + 7) / 8); |
||
980 | args->size = args->pitch * args->height; |
||
981 | |||
982 | ret = ttm_read_lock(&vmaster->lock, true); |
||
4569 | Serge | 983 | if (unlikely(ret != 0)) |
4075 | Serge | 984 | return ret; |
985 | |||
4569 | Serge | 986 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
987 | args->size, false, &args->handle, |
||
988 | &dma_buf); |
||
989 | if (unlikely(ret != 0)) |
||
4075 | Serge | 990 | goto out_no_dmabuf; |
991 | |||
4569 | Serge | 992 | vmw_dmabuf_unreference(&dma_buf); |
4075 | Serge | 993 | out_no_dmabuf: |
994 | ttm_read_unlock(&vmaster->lock); |
||
995 | return ret; |
||
996 | } |
||
997 | #endif |
||
998 | |||
4569 | Serge | 999 | /** |
1000 | * vmw_dumb_map_offset - Return the address space offset of a dumb buffer |
||
1001 | * |
||
1002 | * @file_priv: Pointer to a struct drm_file identifying the caller. |
||
1003 | * @dev: Pointer to the drm device. |
||
1004 | * @handle: Handle identifying the dumb buffer. |
||
1005 | * @offset: The address space offset returned. |
||
1006 | * |
||
1007 | * This is a driver callback for the core drm dumb_map_offset functionality. |
||
1008 | */ |
||
4075 | Serge | 1009 | int vmw_dumb_map_offset(struct drm_file *file_priv, |
1010 | struct drm_device *dev, uint32_t handle, |
||
1011 | uint64_t *offset) |
||
1012 | { |
||
1013 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
||
1014 | struct vmw_dma_buffer *out_buf; |
||
1015 | int ret; |
||
1016 | |||
1017 | ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf); |
||
1018 | if (ret != 0) |
||
1019 | return -EINVAL; |
||
1020 | |||
4111 | Serge | 1021 | *offset = drm_vma_node_offset_addr(&out_buf->base.vma_node); |
4075 | Serge | 1022 | vmw_dmabuf_unreference(&out_buf); |
1023 | return 0; |
||
1024 | } |
||
1025 | |||
4569 | Serge | 1026 | /** |
1027 | * vmw_dumb_destroy - Destroy a dumb boffer |
||
1028 | * |
||
1029 | * @file_priv: Pointer to a struct drm_file identifying the caller. |
||
1030 | * @dev: Pointer to the drm device. |
||
1031 | * @handle: Handle identifying the dumb buffer. |
||
1032 | * |
||
1033 | * This is a driver callback for the core drm dumb_destroy functionality. |
||
1034 | */ |
||
4075 | Serge | 1035 | int vmw_dumb_destroy(struct drm_file *file_priv, |
1036 | struct drm_device *dev, |
||
1037 | uint32_t handle) |
||
1038 | { |
||
1039 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, |
||
1040 | handle, TTM_REF_USAGE); |
||
1041 | } |
||
1042 | |||
1043 | /** |
||
1044 | * vmw_resource_buf_alloc - Allocate a backup buffer for a resource. |
||
1045 | * |
||
1046 | * @res: The resource for which to allocate a backup buffer. |
||
1047 | * @interruptible: Whether any sleeps during allocation should be |
||
1048 | * performed while interruptible. |
||
1049 | */ |
||
1050 | static int vmw_resource_buf_alloc(struct vmw_resource *res, |
||
1051 | bool interruptible) |
||
1052 | { |
||
1053 | unsigned long size = |
||
1054 | (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK; |
||
1055 | struct vmw_dma_buffer *backup; |
||
1056 | int ret; |
||
1057 | |||
1058 | if (likely(res->backup)) { |
||
1059 | BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size); |
||
1060 | return 0; |
||
1061 | } |
||
1062 | |||
1063 | backup = kzalloc(sizeof(*backup), GFP_KERNEL); |
||
1064 | if (unlikely(backup == NULL)) |
||
1065 | return -ENOMEM; |
||
1066 | |||
1067 | ret = vmw_dmabuf_init(res->dev_priv, backup, res->backup_size, |
||
1068 | res->func->backup_placement, |
||
1069 | interruptible, |
||
1070 | &vmw_dmabuf_bo_free); |
||
1071 | if (unlikely(ret != 0)) |
||
1072 | goto out_no_dmabuf; |
||
1073 | |||
1074 | res->backup = backup; |
||
1075 | |||
1076 | out_no_dmabuf: |
||
1077 | return ret; |
||
1078 | } |
||
1079 | |||
1080 | /** |
||
1081 | * vmw_resource_do_validate - Make a resource up-to-date and visible |
||
1082 | * to the device. |
||
1083 | * |
||
1084 | * @res: The resource to make visible to the device. |
||
1085 | * @val_buf: Information about a buffer possibly |
||
1086 | * containing backup data if a bind operation is needed. |
||
1087 | * |
||
1088 | * On hardware resource shortage, this function returns -EBUSY and |
||
1089 | * should be retried once resources have been freed up. |
||
1090 | */ |
||
1091 | static int vmw_resource_do_validate(struct vmw_resource *res, |
||
1092 | struct ttm_validate_buffer *val_buf) |
||
1093 | { |
||
1094 | int ret = 0; |
||
1095 | const struct vmw_res_func *func = res->func; |
||
1096 | |||
1097 | if (unlikely(res->id == -1)) { |
||
1098 | ret = func->create(res); |
||
1099 | if (unlikely(ret != 0)) |
||
1100 | return ret; |
||
1101 | } |
||
1102 | |||
1103 | if (func->bind && |
||
1104 | ((func->needs_backup && list_empty(&res->mob_head) && |
||
1105 | val_buf->bo != NULL) || |
||
1106 | (!func->needs_backup && val_buf->bo != NULL))) { |
||
1107 | ret = func->bind(res, val_buf); |
||
1108 | if (unlikely(ret != 0)) |
||
1109 | goto out_bind_failed; |
||
1110 | if (func->needs_backup) |
||
1111 | list_add_tail(&res->mob_head, &res->backup->res_list); |
||
1112 | } |
||
1113 | |||
1114 | /* |
||
1115 | * Only do this on write operations, and move to |
||
1116 | * vmw_resource_unreserve if it can be called after |
||
1117 | * backup buffers have been unreserved. Otherwise |
||
1118 | * sort out locking. |
||
1119 | */ |
||
1120 | res->res_dirty = true; |
||
1121 | |||
1122 | return 0; |
||
1123 | |||
1124 | out_bind_failed: |
||
1125 | func->destroy(res); |
||
1126 | |||
1127 | return ret; |
||
1128 | } |
||
1129 | |||
1130 | /** |
||
1131 | * vmw_resource_unreserve - Unreserve a resource previously reserved for |
||
1132 | * command submission. |
||
1133 | * |
||
1134 | * @res: Pointer to the struct vmw_resource to unreserve. |
||
1135 | * @new_backup: Pointer to new backup buffer if command submission |
||
1136 | * switched. |
||
1137 | * @new_backup_offset: New backup offset if @new_backup is !NULL. |
||
1138 | * |
||
1139 | * Currently unreserving a resource means putting it back on the device's |
||
1140 | * resource lru list, so that it can be evicted if necessary. |
||
1141 | */ |
||
1142 | void vmw_resource_unreserve(struct vmw_resource *res, |
||
1143 | struct vmw_dma_buffer *new_backup, |
||
1144 | unsigned long new_backup_offset) |
||
1145 | { |
||
1146 | struct vmw_private *dev_priv = res->dev_priv; |
||
1147 | |||
1148 | if (!list_empty(&res->lru_head)) |
||
1149 | return; |
||
1150 | |||
1151 | if (new_backup && new_backup != res->backup) { |
||
1152 | |||
1153 | if (res->backup) { |
||
1154 | lockdep_assert_held(&res->backup->base.resv->lock.base); |
||
1155 | list_del_init(&res->mob_head); |
||
1156 | vmw_dmabuf_unreference(&res->backup); |
||
1157 | } |
||
1158 | |||
1159 | res->backup = vmw_dmabuf_reference(new_backup); |
||
1160 | lockdep_assert_held(&new_backup->base.resv->lock.base); |
||
1161 | list_add_tail(&res->mob_head, &new_backup->res_list); |
||
1162 | } |
||
1163 | if (new_backup) |
||
1164 | res->backup_offset = new_backup_offset; |
||
1165 | |||
4569 | Serge | 1166 | if (!res->func->may_evict || res->id == -1) |
4075 | Serge | 1167 | return; |
1168 | |||
1169 | write_lock(&dev_priv->resource_lock); |
||
1170 | list_add_tail(&res->lru_head, |
||
1171 | &res->dev_priv->res_lru[res->func->res_type]); |
||
1172 | write_unlock(&dev_priv->resource_lock); |
||
1173 | } |
||
1174 | |||
1175 | /** |
||
1176 | * vmw_resource_check_buffer - Check whether a backup buffer is needed |
||
1177 | * for a resource and in that case, allocate |
||
1178 | * one, reserve and validate it. |
||
1179 | * |
||
1180 | * @res: The resource for which to allocate a backup buffer. |
||
1181 | * @interruptible: Whether any sleeps during allocation should be |
||
1182 | * performed while interruptible. |
||
1183 | * @val_buf: On successful return contains data about the |
||
1184 | * reserved and validated backup buffer. |
||
1185 | */ |
||
1186 | static int |
||
1187 | vmw_resource_check_buffer(struct vmw_resource *res, |
||
1188 | bool interruptible, |
||
1189 | struct ttm_validate_buffer *val_buf) |
||
1190 | { |
||
1191 | struct list_head val_list; |
||
1192 | bool backup_dirty = false; |
||
1193 | int ret; |
||
1194 | |||
1195 | if (unlikely(res->backup == NULL)) { |
||
1196 | ret = vmw_resource_buf_alloc(res, interruptible); |
||
1197 | if (unlikely(ret != 0)) |
||
1198 | return ret; |
||
1199 | } |
||
1200 | |||
1201 | INIT_LIST_HEAD(&val_list); |
||
1202 | val_buf->bo = ttm_bo_reference(&res->backup->base); |
||
1203 | list_add_tail(&val_buf->head, &val_list); |
||
4569 | Serge | 1204 | ret = ttm_eu_reserve_buffers(NULL, &val_list); |
4075 | Serge | 1205 | if (unlikely(ret != 0)) |
1206 | goto out_no_reserve; |
||
1207 | |||
1208 | if (res->func->needs_backup && list_empty(&res->mob_head)) |
||
1209 | return 0; |
||
1210 | |||
1211 | backup_dirty = res->backup_dirty; |
||
1212 | ret = ttm_bo_validate(&res->backup->base, |
||
1213 | res->func->backup_placement, |
||
1214 | true, false); |
||
1215 | |||
1216 | if (unlikely(ret != 0)) |
||
1217 | goto out_no_validate; |
||
1218 | |||
1219 | return 0; |
||
1220 | |||
1221 | out_no_validate: |
||
4569 | Serge | 1222 | ttm_eu_backoff_reservation(NULL, &val_list); |
4075 | Serge | 1223 | out_no_reserve: |
1224 | ttm_bo_unref(&val_buf->bo); |
||
1225 | if (backup_dirty) |
||
1226 | vmw_dmabuf_unreference(&res->backup); |
||
1227 | |||
1228 | return ret; |
||
1229 | } |
||
1230 | |||
1231 | /** |
||
1232 | * vmw_resource_reserve - Reserve a resource for command submission |
||
1233 | * |
||
1234 | * @res: The resource to reserve. |
||
1235 | * |
||
1236 | * This function takes the resource off the LRU list and make sure |
||
1237 | * a backup buffer is present for guest-backed resources. However, |
||
1238 | * the buffer may not be bound to the resource at this point. |
||
1239 | * |
||
1240 | */ |
||
1241 | int vmw_resource_reserve(struct vmw_resource *res, bool no_backup) |
||
1242 | { |
||
1243 | struct vmw_private *dev_priv = res->dev_priv; |
||
1244 | int ret; |
||
1245 | |||
1246 | write_lock(&dev_priv->resource_lock); |
||
1247 | list_del_init(&res->lru_head); |
||
1248 | write_unlock(&dev_priv->resource_lock); |
||
1249 | |||
1250 | if (res->func->needs_backup && res->backup == NULL && |
||
1251 | !no_backup) { |
||
1252 | ret = vmw_resource_buf_alloc(res, true); |
||
1253 | if (unlikely(ret != 0)) |
||
1254 | return ret; |
||
1255 | } |
||
1256 | |||
1257 | return 0; |
||
1258 | } |
||
1259 | |||
1260 | /** |
||
1261 | * vmw_resource_backoff_reservation - Unreserve and unreference a |
||
1262 | * backup buffer |
||
1263 | *. |
||
1264 | * @val_buf: Backup buffer information. |
||
1265 | */ |
||
1266 | static void |
||
4569 | Serge | 1267 | vmw_resource_backoff_reservation(struct ttm_validate_buffer *val_buf) |
4075 | Serge | 1268 | { |
1269 | struct list_head val_list; |
||
1270 | |||
1271 | if (likely(val_buf->bo == NULL)) |
||
1272 | return; |
||
1273 | |||
1274 | INIT_LIST_HEAD(&val_list); |
||
1275 | list_add_tail(&val_buf->head, &val_list); |
||
4569 | Serge | 1276 | ttm_eu_backoff_reservation(NULL, &val_list); |
4075 | Serge | 1277 | ttm_bo_unref(&val_buf->bo); |
1278 | } |
||
1279 | |||
1280 | /** |
||
1281 | * vmw_resource_do_evict - Evict a resource, and transfer its data |
||
1282 | * to a backup buffer. |
||
1283 | * |
||
1284 | * @res: The resource to evict. |
||
4569 | Serge | 1285 | * @interruptible: Whether to wait interruptible. |
4075 | Serge | 1286 | */ |
4569 | Serge | 1287 | int vmw_resource_do_evict(struct vmw_resource *res, bool interruptible) |
4075 | Serge | 1288 | { |
1289 | struct ttm_validate_buffer val_buf; |
||
1290 | const struct vmw_res_func *func = res->func; |
||
1291 | int ret; |
||
1292 | |||
1293 | BUG_ON(!func->may_evict); |
||
1294 | |||
1295 | val_buf.bo = NULL; |
||
4569 | Serge | 1296 | ret = vmw_resource_check_buffer(res, interruptible, &val_buf); |
4075 | Serge | 1297 | if (unlikely(ret != 0)) |
1298 | return ret; |
||
1299 | |||
1300 | if (unlikely(func->unbind != NULL && |
||
1301 | (!func->needs_backup || !list_empty(&res->mob_head)))) { |
||
1302 | ret = func->unbind(res, res->res_dirty, &val_buf); |
||
1303 | if (unlikely(ret != 0)) |
||
1304 | goto out_no_unbind; |
||
1305 | list_del_init(&res->mob_head); |
||
1306 | } |
||
1307 | ret = func->destroy(res); |
||
1308 | res->backup_dirty = true; |
||
1309 | res->res_dirty = false; |
||
1310 | out_no_unbind: |
||
4569 | Serge | 1311 | vmw_resource_backoff_reservation(&val_buf); |
4075 | Serge | 1312 | |
1313 | return ret; |
||
1314 | } |
||
1315 | |||
1316 | |||
1317 | /** |
||
1318 | * vmw_resource_validate - Make a resource up-to-date and visible |
||
1319 | * to the device. |
||
1320 | * |
||
1321 | * @res: The resource to make visible to the device. |
||
1322 | * |
||
1323 | * On succesful return, any backup DMA buffer pointed to by @res->backup will |
||
1324 | * be reserved and validated. |
||
1325 | * On hardware resource shortage, this function will repeatedly evict |
||
1326 | * resources of the same type until the validation succeeds. |
||
1327 | */ |
||
1328 | int vmw_resource_validate(struct vmw_resource *res) |
||
1329 | { |
||
1330 | int ret; |
||
1331 | struct vmw_resource *evict_res; |
||
1332 | struct vmw_private *dev_priv = res->dev_priv; |
||
1333 | struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type]; |
||
1334 | struct ttm_validate_buffer val_buf; |
||
4569 | Serge | 1335 | unsigned err_count = 0; |
4075 | Serge | 1336 | |
1337 | if (likely(!res->func->may_evict)) |
||
1338 | return 0; |
||
1339 | |||
1340 | val_buf.bo = NULL; |
||
1341 | if (res->backup) |
||
1342 | val_buf.bo = &res->backup->base; |
||
1343 | do { |
||
1344 | ret = vmw_resource_do_validate(res, &val_buf); |
||
1345 | if (likely(ret != -EBUSY)) |
||
1346 | break; |
||
1347 | |||
1348 | write_lock(&dev_priv->resource_lock); |
||
1349 | if (list_empty(lru_list) || !res->func->may_evict) { |
||
4569 | Serge | 1350 | DRM_ERROR("Out of device device resources " |
4075 | Serge | 1351 | "for %s.\n", res->func->type_name); |
1352 | ret = -EBUSY; |
||
1353 | write_unlock(&dev_priv->resource_lock); |
||
1354 | break; |
||
1355 | } |
||
1356 | |||
1357 | evict_res = vmw_resource_reference |
||
1358 | (list_first_entry(lru_list, struct vmw_resource, |
||
1359 | lru_head)); |
||
1360 | list_del_init(&evict_res->lru_head); |
||
1361 | |||
1362 | write_unlock(&dev_priv->resource_lock); |
||
4569 | Serge | 1363 | |
1364 | ret = vmw_resource_do_evict(evict_res, true); |
||
1365 | if (unlikely(ret != 0)) { |
||
1366 | write_lock(&dev_priv->resource_lock); |
||
1367 | list_add_tail(&evict_res->lru_head, lru_list); |
||
1368 | write_unlock(&dev_priv->resource_lock); |
||
1369 | if (ret == -ERESTARTSYS || |
||
1370 | ++err_count > VMW_RES_EVICT_ERR_COUNT) { |
||
1371 | vmw_resource_unreference(&evict_res); |
||
1372 | goto out_no_validate; |
||
1373 | } |
||
1374 | } |
||
1375 | |||
4075 | Serge | 1376 | vmw_resource_unreference(&evict_res); |
1377 | } while (1); |
||
1378 | |||
1379 | if (unlikely(ret != 0)) |
||
1380 | goto out_no_validate; |
||
1381 | else if (!res->func->needs_backup && res->backup) { |
||
1382 | list_del_init(&res->mob_head); |
||
1383 | vmw_dmabuf_unreference(&res->backup); |
||
1384 | } |
||
1385 | |||
1386 | return 0; |
||
1387 | |||
1388 | out_no_validate: |
||
1389 | return ret; |
||
1390 | } |
||
1391 | |||
1392 | /** |
||
1393 | * vmw_fence_single_bo - Utility function to fence a single TTM buffer |
||
1394 | * object without unreserving it. |
||
1395 | * |
||
1396 | * @bo: Pointer to the struct ttm_buffer_object to fence. |
||
1397 | * @fence: Pointer to the fence. If NULL, this function will |
||
1398 | * insert a fence into the command stream.. |
||
1399 | * |
||
1400 | * Contrary to the ttm_eu version of this function, it takes only |
||
1401 | * a single buffer object instead of a list, and it also doesn't |
||
1402 | * unreserve the buffer object, which needs to be done separately. |
||
1403 | */ |
||
1404 | void vmw_fence_single_bo(struct ttm_buffer_object *bo, |
||
1405 | struct vmw_fence_obj *fence) |
||
1406 | { |
||
1407 | struct ttm_bo_device *bdev = bo->bdev; |
||
1408 | struct ttm_bo_driver *driver = bdev->driver; |
||
1409 | struct vmw_fence_obj *old_fence_obj; |
||
1410 | struct vmw_private *dev_priv = |
||
1411 | container_of(bdev, struct vmw_private, bdev); |
||
1412 | |||
1413 | if (fence == NULL) |
||
1414 | vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); |
||
1415 | else |
||
1416 | driver->sync_obj_ref(fence); |
||
1417 | |||
1418 | spin_lock(&bdev->fence_lock); |
||
1419 | |||
1420 | old_fence_obj = bo->sync_obj; |
||
1421 | bo->sync_obj = fence; |
||
1422 | |||
1423 | spin_unlock(&bdev->fence_lock); |
||
1424 | |||
1425 | if (old_fence_obj) |
||
1426 | vmw_fence_obj_unreference(&old_fence_obj); |
||
1427 | } |
||
1428 | |||
1429 | /** |
||
1430 | * vmw_resource_move_notify - TTM move_notify_callback |
||
1431 | * |
||
1432 | * @bo: The TTM buffer object about to move. |
||
1433 | * @mem: The truct ttm_mem_reg indicating to what memory |
||
1434 | * region the move is taking place. |
||
1435 | * |
||
4569 | Serge | 1436 | * Evicts the Guest Backed hardware resource if the backup |
1437 | * buffer is being moved out of MOB memory. |
||
1438 | * Note that this function should not race with the resource |
||
1439 | * validation code as long as it accesses only members of struct |
||
1440 | * resource that remain static while bo::res is !NULL and |
||
1441 | * while we have @bo reserved. struct resource::backup is *not* a |
||
1442 | * static member. The resource validation code will take care |
||
1443 | * to set @bo::res to NULL, while having @bo reserved when the |
||
1444 | * buffer is no longer bound to the resource, so @bo:res can be |
||
1445 | * used to determine whether there is a need to unbind and whether |
||
1446 | * it is safe to unbind. |
||
4075 | Serge | 1447 | */ |
1448 | void vmw_resource_move_notify(struct ttm_buffer_object *bo, |
||
1449 | struct ttm_mem_reg *mem) |
||
1450 | { |
||
1451 | } |
||
1452 | |||
1453 | /** |
||
1454 | * vmw_resource_needs_backup - Return whether a resource needs a backup buffer. |
||
1455 | * |
||
1456 | * @res: The resource being queried. |
||
1457 | */ |
||
1458 | bool vmw_resource_needs_backup(const struct vmw_resource *res) |
||
1459 | { |
||
1460 | return res->func->needs_backup; |
||
1461 | } |
||
1462 | |||
1463 | /** |
||
1464 | * vmw_resource_evict_type - Evict all resources of a specific type |
||
1465 | * |
||
1466 | * @dev_priv: Pointer to a device private struct |
||
1467 | * @type: The resource type to evict |
||
1468 | * |
||
1469 | * To avoid thrashing starvation or as part of the hibernation sequence, |
||
4569 | Serge | 1470 | * try to evict all evictable resources of a specific type. |
4075 | Serge | 1471 | */ |
1472 | static void vmw_resource_evict_type(struct vmw_private *dev_priv, |
||
1473 | enum vmw_res_type type) |
||
1474 | { |
||
1475 | struct list_head *lru_list = &dev_priv->res_lru[type]; |
||
1476 | struct vmw_resource *evict_res; |
||
4569 | Serge | 1477 | unsigned err_count = 0; |
1478 | int ret; |
||
4075 | Serge | 1479 | |
1480 | do { |
||
1481 | write_lock(&dev_priv->resource_lock); |
||
1482 | |||
1483 | if (list_empty(lru_list)) |
||
1484 | goto out_unlock; |
||
1485 | |||
1486 | evict_res = vmw_resource_reference( |
||
1487 | list_first_entry(lru_list, struct vmw_resource, |
||
1488 | lru_head)); |
||
1489 | list_del_init(&evict_res->lru_head); |
||
1490 | write_unlock(&dev_priv->resource_lock); |
||
4569 | Serge | 1491 | |
1492 | ret = vmw_resource_do_evict(evict_res, false); |
||
1493 | if (unlikely(ret != 0)) { |
||
1494 | write_lock(&dev_priv->resource_lock); |
||
1495 | list_add_tail(&evict_res->lru_head, lru_list); |
||
1496 | write_unlock(&dev_priv->resource_lock); |
||
1497 | if (++err_count > VMW_RES_EVICT_ERR_COUNT) { |
||
1498 | vmw_resource_unreference(&evict_res); |
||
1499 | return; |
||
1500 | } |
||
1501 | } |
||
1502 | |||
4075 | Serge | 1503 | vmw_resource_unreference(&evict_res); |
1504 | } while (1); |
||
1505 | |||
1506 | out_unlock: |
||
1507 | write_unlock(&dev_priv->resource_lock); |
||
1508 | } |
||
1509 | |||
1510 | /** |
||
1511 | * vmw_resource_evict_all - Evict all evictable resources |
||
1512 | * |
||
1513 | * @dev_priv: Pointer to a device private struct |
||
1514 | * |
||
1515 | * To avoid thrashing starvation or as part of the hibernation sequence, |
||
1516 | * evict all evictable resources. In particular this means that all |
||
1517 | * guest-backed resources that are registered with the device are |
||
1518 | * evicted and the OTable becomes clean. |
||
1519 | */ |
||
1520 | void vmw_resource_evict_all(struct vmw_private *dev_priv) |
||
1521 | { |
||
1522 | enum vmw_res_type type; |
||
1523 | |||
1524 | mutex_lock(&dev_priv->cmdbuf_mutex); |
||
1525 | |||
1526 | for (type = 0; type < vmw_res_max; ++type) |
||
1527 | vmw_resource_evict_type(dev_priv, type); |
||
1528 | |||
1529 | mutex_unlock(&dev_priv->cmdbuf_mutex); |
||
1530 | }>>> |