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Rev | Author | Line No. | Line |
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2326 | Serge | 1 | /* |
2 | * Copyright © 2008 Intel Corporation |
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3 | * |
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4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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5 | * copy of this software and associated documentation files (the "Software"), |
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6 | * to deal in the Software without restriction, including without limitation |
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7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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8 | * and/or sell copies of the Software, and to permit persons to whom the |
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9 | * Software is furnished to do so, subject to the following conditions: |
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10 | * |
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11 | * The above copyright notice and this permission notice (including the next |
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12 | * paragraph) shall be included in all copies or substantial portions of the |
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13 | * Software. |
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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21 | * IN THE SOFTWARE. |
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22 | * |
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23 | * Authors: |
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24 | * Eric Anholt |
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25 | * |
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26 | */ |
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27 | |||
3031 | serge | 28 | #include |
29 | #include |
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2326 | Serge | 30 | #include "i915_drv.h" |
2351 | Serge | 31 | #include "i915_trace.h" |
2326 | Serge | 32 | #include "intel_drv.h" |
2330 | Serge | 33 | #include |
2326 | Serge | 34 | //#include |
35 | #include |
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36 | |||
2344 | Serge | 37 | extern int x86_clflush_size; |
2332 | Serge | 38 | |
2344 | Serge | 39 | #undef mb |
40 | #undef rmb |
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41 | #undef wmb |
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42 | #define mb() asm volatile("mfence") |
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43 | #define rmb() asm volatile ("lfence") |
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44 | #define wmb() asm volatile ("sfence") |
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45 | |||
46 | static inline void clflush(volatile void *__p) |
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47 | { |
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48 | asm volatile("clflush %0" : "+m" (*(volatile char*)__p)); |
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49 | } |
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50 | |||
2332 | Serge | 51 | #define MAX_ERRNO 4095 |
52 | |||
53 | #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO) |
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54 | |||
2344 | Serge | 55 | void |
56 | drm_gem_object_free(struct kref *kref) |
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57 | { |
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58 | struct drm_gem_object *obj = (struct drm_gem_object *) kref; |
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59 | struct drm_device *dev = obj->dev; |
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2332 | Serge | 60 | |
2344 | Serge | 61 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); |
62 | |||
63 | i915_gem_free_object(obj); |
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64 | } |
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65 | |||
2332 | Serge | 66 | /** |
67 | * Initialize an already allocated GEM object of the specified size with |
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68 | * shmfs backing store. |
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69 | */ |
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70 | int drm_gem_object_init(struct drm_device *dev, |
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71 | struct drm_gem_object *obj, size_t size) |
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72 | { |
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73 | BUG_ON((size & (PAGE_SIZE - 1)) != 0); |
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74 | |||
75 | obj->dev = dev; |
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2344 | Serge | 76 | kref_init(&obj->refcount); |
2332 | Serge | 77 | atomic_set(&obj->handle_count, 0); |
78 | obj->size = size; |
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79 | |||
80 | return 0; |
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81 | } |
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82 | |||
2344 | Serge | 83 | void |
84 | drm_gem_object_release(struct drm_gem_object *obj) |
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85 | { } |
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2332 | Serge | 86 | |
87 | |||
2326 | Serge | 88 | #define I915_EXEC_CONSTANTS_MASK (3<<6) |
89 | #define I915_EXEC_CONSTANTS_REL_GENERAL (0<<6) /* default */ |
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90 | #define I915_EXEC_CONSTANTS_ABSOLUTE (1<<6) |
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91 | #define I915_EXEC_CONSTANTS_REL_SURFACE (2<<6) /* gen4/5 only */ |
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92 | |||
2332 | Serge | 93 | static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj); |
94 | static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj); |
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95 | static __must_check int i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, |
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96 | unsigned alignment, |
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3031 | serge | 97 | bool map_and_fenceable, |
98 | bool nonblocking); |
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2332 | Serge | 99 | static int i915_gem_phys_pwrite(struct drm_device *dev, |
100 | struct drm_i915_gem_object *obj, |
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101 | struct drm_i915_gem_pwrite *args, |
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102 | struct drm_file *file); |
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2326 | Serge | 103 | |
3031 | serge | 104 | static void i915_gem_write_fence(struct drm_device *dev, int reg, |
105 | struct drm_i915_gem_object *obj); |
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106 | static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, |
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107 | struct drm_i915_fence_reg *fence, |
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108 | bool enable); |
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2332 | Serge | 109 | |
3031 | serge | 110 | static long i915_gem_purge(struct drm_i915_private *dev_priv, long target); |
111 | static void i915_gem_shrink_all(struct drm_i915_private *dev_priv); |
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112 | static void i915_gem_object_truncate(struct drm_i915_gem_object *obj); |
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113 | |||
114 | static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj) |
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115 | { |
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116 | if (obj->tiling_mode) |
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117 | i915_gem_release_mmap(obj); |
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118 | |||
119 | /* As we do not have an associated fence register, we will force |
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120 | * a tiling change if we ever need to acquire one. |
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121 | */ |
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122 | obj->fence_dirty = false; |
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123 | obj->fence_reg = I915_FENCE_REG_NONE; |
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124 | } |
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125 | |||
2332 | Serge | 126 | /* some bookkeeping */ |
127 | static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv, |
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128 | size_t size) |
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129 | { |
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130 | dev_priv->mm.object_count++; |
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131 | dev_priv->mm.object_memory += size; |
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132 | } |
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133 | |||
134 | static void i915_gem_info_remove_obj(struct drm_i915_private *dev_priv, |
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135 | size_t size) |
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136 | { |
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137 | dev_priv->mm.object_count--; |
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138 | dev_priv->mm.object_memory -= size; |
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139 | } |
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140 | |||
141 | #if 0 |
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142 | |||
143 | static int |
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144 | i915_gem_wait_for_error(struct drm_device *dev) |
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145 | { |
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146 | struct drm_i915_private *dev_priv = dev->dev_private; |
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147 | struct completion *x = &dev_priv->error_completion; |
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148 | unsigned long flags; |
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149 | int ret; |
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150 | |||
151 | if (!atomic_read(&dev_priv->mm.wedged)) |
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152 | return 0; |
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153 | |||
3031 | serge | 154 | /* |
155 | * Only wait 10 seconds for the gpu reset to complete to avoid hanging |
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156 | * userspace. If it takes that long something really bad is going on and |
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157 | * we should simply try to bail out and fail as gracefully as possible. |
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158 | */ |
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159 | ret = wait_for_completion_interruptible_timeout(x, 10*HZ); |
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160 | if (ret == 0) { |
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161 | DRM_ERROR("Timed out waiting for the gpu reset to complete\n"); |
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162 | return -EIO; |
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163 | } else if (ret < 0) { |
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2332 | Serge | 164 | return ret; |
3031 | serge | 165 | } |
2332 | Serge | 166 | |
167 | if (atomic_read(&dev_priv->mm.wedged)) { |
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168 | /* GPU is hung, bump the completion count to account for |
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169 | * the token we just consumed so that we never hit zero and |
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170 | * end up waiting upon a subsequent completion event that |
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171 | * will never happen. |
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172 | */ |
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173 | spin_lock_irqsave(&x->wait.lock, flags); |
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174 | x->done++; |
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175 | spin_unlock_irqrestore(&x->wait.lock, flags); |
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176 | } |
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177 | return 0; |
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178 | } |
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179 | |||
180 | int i915_mutex_lock_interruptible(struct drm_device *dev) |
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181 | { |
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182 | int ret; |
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183 | |||
184 | ret = i915_gem_wait_for_error(dev); |
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185 | if (ret) |
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186 | return ret; |
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187 | |||
188 | ret = mutex_lock_interruptible(&dev->struct_mutex); |
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189 | if (ret) |
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190 | return ret; |
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191 | |||
192 | WARN_ON(i915_verify_lists(dev)); |
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193 | return 0; |
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194 | } |
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2352 | Serge | 195 | #endif |
2332 | Serge | 196 | |
197 | static inline bool |
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198 | i915_gem_object_is_inactive(struct drm_i915_gem_object *obj) |
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199 | { |
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3031 | serge | 200 | return obj->gtt_space && !obj->active; |
2332 | Serge | 201 | } |
202 | |||
203 | |||
204 | #if 0 |
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205 | |||
206 | int |
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207 | i915_gem_init_ioctl(struct drm_device *dev, void *data, |
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208 | struct drm_file *file) |
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209 | { |
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210 | struct drm_i915_gem_init *args = data; |
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211 | |||
3031 | serge | 212 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
213 | return -ENODEV; |
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214 | |||
2332 | Serge | 215 | if (args->gtt_start >= args->gtt_end || |
216 | (args->gtt_end | args->gtt_start) & (PAGE_SIZE - 1)) |
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217 | return -EINVAL; |
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218 | |||
3031 | serge | 219 | /* GEM with user mode setting was never supported on ilk and later. */ |
220 | if (INTEL_INFO(dev)->gen >= 5) |
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221 | return -ENODEV; |
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222 | |||
2332 | Serge | 223 | mutex_lock(&dev->struct_mutex); |
3031 | serge | 224 | i915_gem_init_global_gtt(dev, args->gtt_start, |
225 | args->gtt_end, args->gtt_end); |
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2332 | Serge | 226 | mutex_unlock(&dev->struct_mutex); |
227 | |||
228 | return 0; |
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229 | } |
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2351 | Serge | 230 | #endif |
2332 | Serge | 231 | |
232 | int |
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233 | i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, |
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234 | struct drm_file *file) |
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235 | { |
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236 | struct drm_i915_private *dev_priv = dev->dev_private; |
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237 | struct drm_i915_gem_get_aperture *args = data; |
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238 | struct drm_i915_gem_object *obj; |
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239 | size_t pinned; |
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240 | |||
241 | pinned = 0; |
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242 | mutex_lock(&dev->struct_mutex); |
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3031 | serge | 243 | list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list) |
244 | if (obj->pin_count) |
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2332 | Serge | 245 | pinned += obj->gtt_space->size; |
246 | mutex_unlock(&dev->struct_mutex); |
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247 | |||
248 | args->aper_size = dev_priv->mm.gtt_total; |
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2342 | Serge | 249 | args->aper_available_size = args->aper_size - pinned; |
2332 | Serge | 250 | |
251 | return 0; |
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252 | } |
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253 | |||
2351 | Serge | 254 | #if 0 |
3031 | serge | 255 | static int |
256 | i915_gem_create(struct drm_file *file, |
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2332 | Serge | 257 | struct drm_device *dev, |
258 | uint64_t size, |
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259 | uint32_t *handle_p) |
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260 | { |
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261 | struct drm_i915_gem_object *obj; |
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262 | int ret; |
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263 | u32 handle; |
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264 | |||
265 | size = roundup(size, PAGE_SIZE); |
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2342 | Serge | 266 | if (size == 0) |
267 | return -EINVAL; |
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2332 | Serge | 268 | |
269 | /* Allocate the new object */ |
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270 | obj = i915_gem_alloc_object(dev, size); |
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271 | if (obj == NULL) |
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272 | return -ENOMEM; |
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273 | |||
274 | ret = drm_gem_handle_create(file, &obj->base, &handle); |
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275 | if (ret) { |
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276 | drm_gem_object_release(&obj->base); |
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277 | i915_gem_info_remove_obj(dev->dev_private, obj->base.size); |
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278 | kfree(obj); |
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279 | return ret; |
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280 | } |
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281 | |||
282 | /* drop reference from allocate - handle holds it now */ |
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283 | drm_gem_object_unreference(&obj->base); |
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2351 | Serge | 284 | trace_i915_gem_object_create(obj); |
2332 | Serge | 285 | |
286 | *handle_p = handle; |
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287 | return 0; |
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288 | } |
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289 | |||
290 | int |
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291 | i915_gem_dumb_create(struct drm_file *file, |
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292 | struct drm_device *dev, |
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293 | struct drm_mode_create_dumb *args) |
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294 | { |
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295 | /* have to work out size/pitch and return them */ |
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296 | args->pitch = ALIGN(args->width * ((args->bpp + 7) / 8), 64); |
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297 | args->size = args->pitch * args->height; |
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298 | return i915_gem_create(file, dev, |
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299 | args->size, &args->handle); |
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300 | } |
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301 | |||
302 | int i915_gem_dumb_destroy(struct drm_file *file, |
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303 | struct drm_device *dev, |
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304 | uint32_t handle) |
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305 | { |
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306 | return drm_gem_handle_delete(file, handle); |
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307 | } |
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308 | |||
2326 | Serge | 309 | /** |
2332 | Serge | 310 | * Creates a new mm object and returns a handle to it. |
311 | */ |
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312 | int |
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313 | i915_gem_create_ioctl(struct drm_device *dev, void *data, |
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314 | struct drm_file *file) |
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315 | { |
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316 | struct drm_i915_gem_create *args = data; |
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3031 | serge | 317 | |
2332 | Serge | 318 | return i915_gem_create(file, dev, |
319 | args->size, &args->handle); |
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320 | } |
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321 | |||
322 | static int i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj) |
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323 | { |
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324 | drm_i915_private_t *dev_priv = obj->base.dev->dev_private; |
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325 | |||
326 | return dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 && |
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327 | obj->tiling_mode != I915_TILING_NONE; |
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328 | } |
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329 | |||
3031 | serge | 330 | static inline int |
331 | __copy_to_user_swizzled(char __user *cpu_vaddr, |
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332 | const char *gpu_vaddr, int gpu_offset, |
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2332 | Serge | 333 | int length) |
334 | { |
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3031 | serge | 335 | int ret, cpu_offset = 0; |
2332 | Serge | 336 | |
3031 | serge | 337 | while (length > 0) { |
338 | int cacheline_end = ALIGN(gpu_offset + 1, 64); |
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339 | int this_length = min(cacheline_end - gpu_offset, length); |
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340 | int swizzled_gpu_offset = gpu_offset ^ 64; |
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2332 | Serge | 341 | |
3031 | serge | 342 | ret = __copy_to_user(cpu_vaddr + cpu_offset, |
343 | gpu_vaddr + swizzled_gpu_offset, |
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344 | this_length); |
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345 | if (ret) |
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346 | return ret + length; |
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2332 | Serge | 347 | |
3031 | serge | 348 | cpu_offset += this_length; |
349 | gpu_offset += this_length; |
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350 | length -= this_length; |
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351 | } |
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352 | |||
353 | return 0; |
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2332 | Serge | 354 | } |
355 | |||
3031 | serge | 356 | static inline int |
357 | __copy_from_user_swizzled(char *gpu_vaddr, int gpu_offset, |
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358 | const char __user *cpu_vaddr, |
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359 | int length) |
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2332 | Serge | 360 | { |
3031 | serge | 361 | int ret, cpu_offset = 0; |
2332 | Serge | 362 | |
363 | while (length > 0) { |
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364 | int cacheline_end = ALIGN(gpu_offset + 1, 64); |
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365 | int this_length = min(cacheline_end - gpu_offset, length); |
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366 | int swizzled_gpu_offset = gpu_offset ^ 64; |
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367 | |||
3031 | serge | 368 | ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset, |
2332 | Serge | 369 | cpu_vaddr + cpu_offset, |
370 | this_length); |
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3031 | serge | 371 | if (ret) |
372 | return ret + length; |
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373 | |||
2332 | Serge | 374 | cpu_offset += this_length; |
375 | gpu_offset += this_length; |
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376 | length -= this_length; |
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377 | } |
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378 | |||
3031 | serge | 379 | return 0; |
2332 | Serge | 380 | } |
381 | |||
3031 | serge | 382 | /* Per-page copy function for the shmem pread fastpath. |
383 | * Flushes invalid cachelines before reading the target if |
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384 | * needs_clflush is set. */ |
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2332 | Serge | 385 | static int |
3031 | serge | 386 | shmem_pread_fast(struct page *page, int shmem_page_offset, int page_length, |
387 | char __user *user_data, |
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388 | bool page_do_bit17_swizzling, bool needs_clflush) |
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389 | { |
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390 | char *vaddr; |
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391 | int ret; |
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392 | |||
393 | if (unlikely(page_do_bit17_swizzling)) |
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394 | return -EINVAL; |
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395 | |||
396 | vaddr = kmap_atomic(page); |
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397 | if (needs_clflush) |
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398 | drm_clflush_virt_range(vaddr + shmem_page_offset, |
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399 | page_length); |
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400 | ret = __copy_to_user_inatomic(user_data, |
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401 | vaddr + shmem_page_offset, |
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402 | page_length); |
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403 | kunmap_atomic(vaddr); |
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404 | |||
405 | return ret ? -EFAULT : 0; |
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406 | } |
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407 | |||
408 | static void |
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409 | shmem_clflush_swizzled_range(char *addr, unsigned long length, |
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410 | bool swizzled) |
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411 | { |
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412 | if (unlikely(swizzled)) { |
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413 | unsigned long start = (unsigned long) addr; |
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414 | unsigned long end = (unsigned long) addr + length; |
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415 | |||
416 | /* For swizzling simply ensure that we always flush both |
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417 | * channels. Lame, but simple and it works. Swizzled |
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418 | * pwrite/pread is far from a hotpath - current userspace |
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419 | * doesn't use it at all. */ |
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420 | start = round_down(start, 128); |
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421 | end = round_up(end, 128); |
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422 | |||
423 | drm_clflush_virt_range((void *)start, end - start); |
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424 | } else { |
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425 | drm_clflush_virt_range(addr, length); |
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426 | } |
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427 | |||
428 | } |
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429 | |||
430 | /* Only difference to the fast-path function is that this can handle bit17 |
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431 | * and uses non-atomic copy and kmap functions. */ |
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432 | static int |
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433 | shmem_pread_slow(struct page *page, int shmem_page_offset, int page_length, |
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434 | char __user *user_data, |
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435 | bool page_do_bit17_swizzling, bool needs_clflush) |
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436 | { |
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437 | char *vaddr; |
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438 | int ret; |
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439 | |||
440 | vaddr = kmap(page); |
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441 | if (needs_clflush) |
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442 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
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443 | page_length, |
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444 | page_do_bit17_swizzling); |
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445 | |||
446 | if (page_do_bit17_swizzling) |
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447 | ret = __copy_to_user_swizzled(user_data, |
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448 | vaddr, shmem_page_offset, |
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449 | page_length); |
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450 | else |
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451 | ret = __copy_to_user(user_data, |
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452 | vaddr + shmem_page_offset, |
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453 | page_length); |
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454 | kunmap(page); |
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455 | |||
456 | return ret ? - EFAULT : 0; |
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457 | } |
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458 | |||
459 | static int |
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460 | i915_gem_shmem_pread(struct drm_device *dev, |
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2332 | Serge | 461 | struct drm_i915_gem_object *obj, |
462 | struct drm_i915_gem_pread *args, |
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463 | struct drm_file *file) |
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464 | { |
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3031 | serge | 465 | char __user *user_data; |
2332 | Serge | 466 | ssize_t remain; |
467 | loff_t offset; |
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3031 | serge | 468 | int shmem_page_offset, page_length, ret = 0; |
469 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
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470 | int hit_slowpath = 0; |
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471 | int prefaulted = 0; |
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472 | int needs_clflush = 0; |
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473 | struct scatterlist *sg; |
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474 | int i; |
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2332 | Serge | 475 | |
476 | user_data = (char __user *) (uintptr_t) args->data_ptr; |
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477 | remain = args->size; |
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478 | |||
3031 | serge | 479 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
480 | |||
481 | if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) { |
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482 | /* If we're not in the cpu read domain, set ourself into the gtt |
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483 | * read domain and manually flush cachelines (if required). This |
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484 | * optimizes for the case when the gpu will dirty the data |
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485 | * anyway again before the next pread happens. */ |
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486 | if (obj->cache_level == I915_CACHE_NONE) |
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487 | needs_clflush = 1; |
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488 | if (obj->gtt_space) { |
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489 | ret = i915_gem_object_set_to_gtt_domain(obj, false); |
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490 | if (ret) |
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491 | return ret; |
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492 | } |
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493 | } |
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494 | |||
495 | ret = i915_gem_object_get_pages(obj); |
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496 | if (ret) |
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497 | return ret; |
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498 | |||
499 | i915_gem_object_pin_pages(obj); |
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500 | |||
2332 | Serge | 501 | offset = args->offset; |
502 | |||
3031 | serge | 503 | for_each_sg(obj->pages->sgl, sg, obj->pages->nents, i) { |
2332 | Serge | 504 | struct page *page; |
505 | |||
3031 | serge | 506 | if (i < offset >> PAGE_SHIFT) |
507 | continue; |
||
508 | |||
509 | if (remain <= 0) |
||
510 | break; |
||
511 | |||
2332 | Serge | 512 | /* Operation in this page |
513 | * |
||
3031 | serge | 514 | * shmem_page_offset = offset within page in shmem file |
2332 | Serge | 515 | * page_length = bytes to copy for this page |
516 | */ |
||
3031 | serge | 517 | shmem_page_offset = offset_in_page(offset); |
2332 | Serge | 518 | page_length = remain; |
3031 | serge | 519 | if ((shmem_page_offset + page_length) > PAGE_SIZE) |
520 | page_length = PAGE_SIZE - shmem_page_offset; |
||
2332 | Serge | 521 | |
3031 | serge | 522 | page = sg_page(sg); |
523 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
||
524 | (page_to_phys(page) & (1 << 17)) != 0; |
||
2332 | Serge | 525 | |
3031 | serge | 526 | ret = shmem_pread_fast(page, shmem_page_offset, page_length, |
527 | user_data, page_do_bit17_swizzling, |
||
528 | needs_clflush); |
||
529 | if (ret == 0) |
||
530 | goto next_page; |
||
2332 | Serge | 531 | |
3031 | serge | 532 | hit_slowpath = 1; |
533 | mutex_unlock(&dev->struct_mutex); |
||
534 | |||
535 | if (!prefaulted) { |
||
536 | ret = fault_in_multipages_writeable(user_data, remain); |
||
537 | /* Userspace is tricking us, but we've already clobbered |
||
538 | * its pages with the prefault and promised to write the |
||
539 | * data up to the first fault. Hence ignore any errors |
||
540 | * and just continue. */ |
||
541 | (void)ret; |
||
542 | prefaulted = 1; |
||
543 | } |
||
544 | |||
545 | ret = shmem_pread_slow(page, shmem_page_offset, page_length, |
||
546 | user_data, page_do_bit17_swizzling, |
||
547 | needs_clflush); |
||
548 | |||
549 | mutex_lock(&dev->struct_mutex); |
||
550 | |||
551 | next_page: |
||
2332 | Serge | 552 | mark_page_accessed(page); |
3031 | serge | 553 | |
2332 | Serge | 554 | if (ret) |
3031 | serge | 555 | goto out; |
2332 | Serge | 556 | |
557 | remain -= page_length; |
||
558 | user_data += page_length; |
||
559 | offset += page_length; |
||
560 | } |
||
561 | |||
3031 | serge | 562 | out: |
563 | i915_gem_object_unpin_pages(obj); |
||
564 | |||
565 | if (hit_slowpath) { |
||
566 | /* Fixup: Kill any reinstated backing storage pages */ |
||
567 | if (obj->madv == __I915_MADV_PURGED) |
||
568 | i915_gem_object_truncate(obj); |
||
569 | } |
||
570 | |||
571 | return ret; |
||
2332 | Serge | 572 | } |
573 | |||
574 | /** |
||
3031 | serge | 575 | * Reads data from the object referenced by handle. |
576 | * |
||
577 | * On error, the contents of *data are undefined. |
||
2332 | Serge | 578 | */ |
3031 | serge | 579 | int |
580 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, |
||
581 | struct drm_file *file) |
||
582 | { |
||
583 | struct drm_i915_gem_pread *args = data; |
||
584 | struct drm_i915_gem_object *obj; |
||
585 | int ret = 0; |
||
586 | |||
587 | if (args->size == 0) |
||
588 | return 0; |
||
589 | |||
590 | if (!access_ok(VERIFY_WRITE, |
||
591 | (char __user *)(uintptr_t)args->data_ptr, |
||
592 | args->size)) |
||
593 | return -EFAULT; |
||
594 | |||
595 | ret = i915_mutex_lock_interruptible(dev); |
||
596 | if (ret) |
||
597 | return ret; |
||
598 | |||
599 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
||
600 | if (&obj->base == NULL) { |
||
601 | ret = -ENOENT; |
||
602 | goto unlock; |
||
603 | } |
||
604 | |||
605 | /* Bounds check source. */ |
||
606 | if (args->offset > obj->base.size || |
||
607 | args->size > obj->base.size - args->offset) { |
||
608 | ret = -EINVAL; |
||
609 | goto out; |
||
610 | } |
||
611 | |||
612 | /* prime objects have no backing filp to GEM pread/pwrite |
||
613 | * pages from. |
||
614 | */ |
||
615 | if (!obj->base.filp) { |
||
616 | ret = -EINVAL; |
||
617 | goto out; |
||
618 | } |
||
619 | |||
620 | trace_i915_gem_object_pread(obj, args->offset, args->size); |
||
621 | |||
622 | ret = i915_gem_shmem_pread(dev, obj, args, file); |
||
623 | |||
624 | out: |
||
625 | drm_gem_object_unreference(&obj->base); |
||
626 | unlock: |
||
627 | mutex_unlock(&dev->struct_mutex); |
||
628 | return ret; |
||
629 | } |
||
630 | |||
631 | /* This is the fast write path which cannot handle |
||
632 | * page faults in the source data |
||
633 | */ |
||
634 | |||
635 | static inline int |
||
636 | fast_user_write(struct io_mapping *mapping, |
||
637 | loff_t page_base, int page_offset, |
||
638 | char __user *user_data, |
||
639 | int length) |
||
640 | { |
||
641 | void __iomem *vaddr_atomic; |
||
642 | void *vaddr; |
||
643 | unsigned long unwritten; |
||
644 | |||
645 | vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base); |
||
646 | /* We can use the cpu mem copy function because this is X86. */ |
||
647 | vaddr = (void __force*)vaddr_atomic + page_offset; |
||
648 | unwritten = __copy_from_user_inatomic_nocache(vaddr, |
||
649 | user_data, length); |
||
650 | io_mapping_unmap_atomic(vaddr_atomic); |
||
651 | return unwritten; |
||
652 | } |
||
653 | |||
654 | /** |
||
655 | * This is the fast pwrite path, where we copy the data directly from the |
||
656 | * user into the GTT, uncached. |
||
657 | */ |
||
2332 | Serge | 658 | static int |
3031 | serge | 659 | i915_gem_gtt_pwrite_fast(struct drm_device *dev, |
660 | struct drm_i915_gem_object *obj, |
||
661 | struct drm_i915_gem_pwrite *args, |
||
662 | struct drm_file *file) |
||
2332 | Serge | 663 | { |
3031 | serge | 664 | drm_i915_private_t *dev_priv = dev->dev_private; |
2332 | Serge | 665 | ssize_t remain; |
3031 | serge | 666 | loff_t offset, page_base; |
667 | char __user *user_data; |
||
668 | int page_offset, page_length, ret; |
||
2332 | Serge | 669 | |
3031 | serge | 670 | ret = i915_gem_object_pin(obj, 0, true, true); |
671 | if (ret) |
||
672 | goto out; |
||
673 | |||
674 | ret = i915_gem_object_set_to_gtt_domain(obj, true); |
||
675 | if (ret) |
||
676 | goto out_unpin; |
||
677 | |||
678 | ret = i915_gem_object_put_fence(obj); |
||
679 | if (ret) |
||
680 | goto out_unpin; |
||
681 | |||
682 | user_data = (char __user *) (uintptr_t) args->data_ptr; |
||
2332 | Serge | 683 | remain = args->size; |
684 | |||
3031 | serge | 685 | offset = obj->gtt_offset + args->offset; |
2332 | Serge | 686 | |
3031 | serge | 687 | while (remain > 0) { |
688 | /* Operation in this page |
||
689 | * |
||
690 | * page_base = page offset within aperture |
||
691 | * page_offset = offset within page |
||
692 | * page_length = bytes to copy for this page |
||
693 | */ |
||
694 | page_base = offset & PAGE_MASK; |
||
695 | page_offset = offset_in_page(offset); |
||
696 | page_length = remain; |
||
697 | if ((page_offset + remain) > PAGE_SIZE) |
||
698 | page_length = PAGE_SIZE - page_offset; |
||
2332 | Serge | 699 | |
3031 | serge | 700 | /* If we get a fault while copying data, then (presumably) our |
701 | * source page isn't available. Return the error and we'll |
||
702 | * retry in the slow path. |
||
703 | */ |
||
704 | if (fast_user_write(dev_priv->mm.gtt_mapping, page_base, |
||
705 | page_offset, user_data, page_length)) { |
||
706 | ret = -EFAULT; |
||
707 | goto out_unpin; |
||
708 | } |
||
709 | |||
710 | remain -= page_length; |
||
711 | user_data += page_length; |
||
712 | offset += page_length; |
||
2332 | Serge | 713 | } |
714 | |||
3031 | serge | 715 | out_unpin: |
716 | i915_gem_object_unpin(obj); |
||
717 | out: |
||
718 | return ret; |
||
719 | } |
||
720 | |||
721 | /* Per-page copy function for the shmem pwrite fastpath. |
||
722 | * Flushes invalid cachelines before writing to the target if |
||
723 | * needs_clflush_before is set and flushes out any written cachelines after |
||
724 | * writing if needs_clflush is set. */ |
||
725 | static int |
||
726 | shmem_pwrite_fast(struct page *page, int shmem_page_offset, int page_length, |
||
727 | char __user *user_data, |
||
728 | bool page_do_bit17_swizzling, |
||
729 | bool needs_clflush_before, |
||
730 | bool needs_clflush_after) |
||
731 | { |
||
732 | char *vaddr; |
||
733 | int ret; |
||
734 | |||
735 | if (unlikely(page_do_bit17_swizzling)) |
||
736 | return -EINVAL; |
||
737 | |||
738 | vaddr = kmap_atomic(page); |
||
739 | if (needs_clflush_before) |
||
740 | drm_clflush_virt_range(vaddr + shmem_page_offset, |
||
741 | page_length); |
||
742 | ret = __copy_from_user_inatomic_nocache(vaddr + shmem_page_offset, |
||
743 | user_data, |
||
744 | page_length); |
||
745 | if (needs_clflush_after) |
||
746 | drm_clflush_virt_range(vaddr + shmem_page_offset, |
||
747 | page_length); |
||
748 | kunmap_atomic(vaddr); |
||
749 | |||
750 | return ret ? -EFAULT : 0; |
||
751 | } |
||
752 | |||
753 | /* Only difference to the fast-path function is that this can handle bit17 |
||
754 | * and uses non-atomic copy and kmap functions. */ |
||
755 | static int |
||
756 | shmem_pwrite_slow(struct page *page, int shmem_page_offset, int page_length, |
||
757 | char __user *user_data, |
||
758 | bool page_do_bit17_swizzling, |
||
759 | bool needs_clflush_before, |
||
760 | bool needs_clflush_after) |
||
761 | { |
||
762 | char *vaddr; |
||
763 | int ret; |
||
764 | |||
765 | vaddr = kmap(page); |
||
766 | if (unlikely(needs_clflush_before || page_do_bit17_swizzling)) |
||
767 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
||
768 | page_length, |
||
769 | page_do_bit17_swizzling); |
||
770 | if (page_do_bit17_swizzling) |
||
771 | ret = __copy_from_user_swizzled(vaddr, shmem_page_offset, |
||
772 | user_data, |
||
773 | page_length); |
||
774 | else |
||
775 | ret = __copy_from_user(vaddr + shmem_page_offset, |
||
776 | user_data, |
||
777 | page_length); |
||
778 | if (needs_clflush_after) |
||
779 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
||
780 | page_length, |
||
781 | page_do_bit17_swizzling); |
||
782 | kunmap(page); |
||
783 | |||
784 | return ret ? -EFAULT : 0; |
||
785 | } |
||
786 | |||
787 | static int |
||
788 | i915_gem_shmem_pwrite(struct drm_device *dev, |
||
789 | struct drm_i915_gem_object *obj, |
||
790 | struct drm_i915_gem_pwrite *args, |
||
791 | struct drm_file *file) |
||
792 | { |
||
793 | ssize_t remain; |
||
794 | loff_t offset; |
||
795 | char __user *user_data; |
||
796 | int shmem_page_offset, page_length, ret = 0; |
||
797 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
||
798 | int hit_slowpath = 0; |
||
799 | int needs_clflush_after = 0; |
||
800 | int needs_clflush_before = 0; |
||
801 | int i; |
||
802 | struct scatterlist *sg; |
||
803 | |||
804 | user_data = (char __user *) (uintptr_t) args->data_ptr; |
||
805 | remain = args->size; |
||
806 | |||
807 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
||
808 | |||
809 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
||
810 | /* If we're not in the cpu write domain, set ourself into the gtt |
||
811 | * write domain and manually flush cachelines (if required). This |
||
812 | * optimizes for the case when the gpu will use the data |
||
813 | * right away and we therefore have to clflush anyway. */ |
||
814 | if (obj->cache_level == I915_CACHE_NONE) |
||
815 | needs_clflush_after = 1; |
||
816 | if (obj->gtt_space) { |
||
817 | ret = i915_gem_object_set_to_gtt_domain(obj, true); |
||
818 | if (ret) |
||
819 | return ret; |
||
820 | } |
||
821 | } |
||
822 | /* Same trick applies for invalidate partially written cachelines before |
||
823 | * writing. */ |
||
824 | if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU) |
||
825 | && obj->cache_level == I915_CACHE_NONE) |
||
826 | needs_clflush_before = 1; |
||
827 | |||
828 | ret = i915_gem_object_get_pages(obj); |
||
2332 | Serge | 829 | if (ret) |
3031 | serge | 830 | return ret; |
2332 | Serge | 831 | |
3031 | serge | 832 | i915_gem_object_pin_pages(obj); |
2332 | Serge | 833 | |
834 | offset = args->offset; |
||
3031 | serge | 835 | obj->dirty = 1; |
2332 | Serge | 836 | |
3031 | serge | 837 | for_each_sg(obj->pages->sgl, sg, obj->pages->nents, i) { |
2332 | Serge | 838 | struct page *page; |
3031 | serge | 839 | int partial_cacheline_write; |
2332 | Serge | 840 | |
3031 | serge | 841 | if (i < offset >> PAGE_SHIFT) |
842 | continue; |
||
843 | |||
844 | if (remain <= 0) |
||
845 | break; |
||
846 | |||
2332 | Serge | 847 | /* Operation in this page |
848 | * |
||
849 | * shmem_page_offset = offset within page in shmem file |
||
850 | * page_length = bytes to copy for this page |
||
851 | */ |
||
852 | shmem_page_offset = offset_in_page(offset); |
||
853 | |||
854 | page_length = remain; |
||
855 | if ((shmem_page_offset + page_length) > PAGE_SIZE) |
||
856 | page_length = PAGE_SIZE - shmem_page_offset; |
||
857 | |||
3031 | serge | 858 | /* If we don't overwrite a cacheline completely we need to be |
859 | * careful to have up-to-date data by first clflushing. Don't |
||
860 | * overcomplicate things and flush the entire patch. */ |
||
861 | partial_cacheline_write = needs_clflush_before && |
||
862 | ((shmem_page_offset | page_length) |
||
863 | & (boot_cpu_data.x86_clflush_size - 1)); |
||
2332 | Serge | 864 | |
3031 | serge | 865 | page = sg_page(sg); |
866 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
||
867 | (page_to_phys(page) & (1 << 17)) != 0; |
||
2332 | Serge | 868 | |
3031 | serge | 869 | ret = shmem_pwrite_fast(page, shmem_page_offset, page_length, |
870 | user_data, page_do_bit17_swizzling, |
||
871 | partial_cacheline_write, |
||
872 | needs_clflush_after); |
||
873 | if (ret == 0) |
||
874 | goto next_page; |
||
875 | |||
876 | hit_slowpath = 1; |
||
877 | mutex_unlock(&dev->struct_mutex); |
||
878 | ret = shmem_pwrite_slow(page, shmem_page_offset, page_length, |
||
879 | user_data, page_do_bit17_swizzling, |
||
880 | partial_cacheline_write, |
||
881 | needs_clflush_after); |
||
882 | |||
883 | mutex_lock(&dev->struct_mutex); |
||
884 | |||
885 | next_page: |
||
886 | set_page_dirty(page); |
||
2332 | Serge | 887 | mark_page_accessed(page); |
888 | |||
3031 | serge | 889 | if (ret) |
890 | goto out; |
||
891 | |||
2332 | Serge | 892 | remain -= page_length; |
3031 | serge | 893 | user_data += page_length; |
2332 | Serge | 894 | offset += page_length; |
895 | } |
||
896 | |||
897 | out: |
||
3031 | serge | 898 | i915_gem_object_unpin_pages(obj); |
899 | |||
900 | if (hit_slowpath) { |
||
901 | /* Fixup: Kill any reinstated backing storage pages */ |
||
902 | if (obj->madv == __I915_MADV_PURGED) |
||
903 | i915_gem_object_truncate(obj); |
||
904 | /* and flush dirty cachelines in case the object isn't in the cpu write |
||
905 | * domain anymore. */ |
||
906 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
||
907 | i915_gem_clflush_object(obj); |
||
3243 | Serge | 908 | i915_gem_chipset_flush(dev); |
3031 | serge | 909 | } |
2332 | Serge | 910 | } |
911 | |||
3031 | serge | 912 | if (needs_clflush_after) |
3243 | Serge | 913 | i915_gem_chipset_flush(dev); |
3031 | serge | 914 | |
2332 | Serge | 915 | return ret; |
916 | } |
||
3031 | serge | 917 | |
918 | /** |
||
919 | * Writes data to the object referenced by handle. |
||
920 | * |
||
921 | * On error, the contents of the buffer that were to be modified are undefined. |
||
922 | */ |
||
923 | int |
||
924 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, |
||
925 | struct drm_file *file) |
||
926 | { |
||
927 | struct drm_i915_gem_pwrite *args = data; |
||
928 | struct drm_i915_gem_object *obj; |
||
929 | int ret; |
||
930 | |||
931 | if (args->size == 0) |
||
932 | return 0; |
||
933 | |||
934 | if (!access_ok(VERIFY_READ, |
||
935 | (char __user *)(uintptr_t)args->data_ptr, |
||
936 | args->size)) |
||
937 | return -EFAULT; |
||
938 | |||
939 | ret = fault_in_multipages_readable((char __user *)(uintptr_t)args->data_ptr, |
||
940 | args->size); |
||
941 | if (ret) |
||
942 | return -EFAULT; |
||
943 | |||
944 | ret = i915_mutex_lock_interruptible(dev); |
||
945 | if (ret) |
||
946 | return ret; |
||
947 | |||
948 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
||
949 | if (&obj->base == NULL) { |
||
950 | ret = -ENOENT; |
||
951 | goto unlock; |
||
952 | } |
||
953 | |||
954 | /* Bounds check destination. */ |
||
955 | if (args->offset > obj->base.size || |
||
956 | args->size > obj->base.size - args->offset) { |
||
957 | ret = -EINVAL; |
||
958 | goto out; |
||
959 | } |
||
960 | |||
961 | /* prime objects have no backing filp to GEM pread/pwrite |
||
962 | * pages from. |
||
963 | */ |
||
964 | if (!obj->base.filp) { |
||
965 | ret = -EINVAL; |
||
966 | goto out; |
||
967 | } |
||
968 | |||
969 | trace_i915_gem_object_pwrite(obj, args->offset, args->size); |
||
970 | |||
971 | ret = -EFAULT; |
||
972 | /* We can only do the GTT pwrite on untiled buffers, as otherwise |
||
973 | * it would end up going through the fenced access, and we'll get |
||
974 | * different detiling behavior between reading and writing. |
||
975 | * pread/pwrite currently are reading and writing from the CPU |
||
976 | * perspective, requiring manual detiling by the client. |
||
977 | */ |
||
978 | if (obj->phys_obj) { |
||
979 | ret = i915_gem_phys_pwrite(dev, obj, args, file); |
||
980 | goto out; |
||
981 | } |
||
982 | |||
983 | if (obj->cache_level == I915_CACHE_NONE && |
||
984 | obj->tiling_mode == I915_TILING_NONE && |
||
985 | obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
||
986 | ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file); |
||
987 | /* Note that the gtt paths might fail with non-page-backed user |
||
988 | * pointers (e.g. gtt mappings when moving data between |
||
989 | * textures). Fallback to the shmem path in that case. */ |
||
990 | } |
||
991 | |||
992 | if (ret == -EFAULT || ret == -ENOSPC) |
||
993 | ret = i915_gem_shmem_pwrite(dev, obj, args, file); |
||
994 | |||
995 | out: |
||
996 | drm_gem_object_unreference(&obj->base); |
||
997 | unlock: |
||
998 | mutex_unlock(&dev->struct_mutex); |
||
999 | return ret; |
||
1000 | } |
||
1001 | |||
2332 | Serge | 1002 | #endif |
1003 | |||
3031 | serge | 1004 | int |
1005 | i915_gem_check_wedge(struct drm_i915_private *dev_priv, |
||
1006 | bool interruptible) |
||
1007 | { |
||
1008 | if (atomic_read(&dev_priv->mm.wedged)) { |
||
1009 | struct completion *x = &dev_priv->error_completion; |
||
1010 | bool recovery_complete; |
||
1011 | unsigned long flags; |
||
2332 | Serge | 1012 | |
3031 | serge | 1013 | /* Give the error handler a chance to run. */ |
1014 | spin_lock_irqsave(&x->wait.lock, flags); |
||
1015 | recovery_complete = x->done > 0; |
||
1016 | spin_unlock_irqrestore(&x->wait.lock, flags); |
||
2332 | Serge | 1017 | |
3031 | serge | 1018 | /* Non-interruptible callers can't handle -EAGAIN, hence return |
1019 | * -EIO unconditionally for these. */ |
||
1020 | if (!interruptible) |
||
1021 | return -EIO; |
||
2332 | Serge | 1022 | |
3031 | serge | 1023 | /* Recovery complete, but still wedged means reset failure. */ |
1024 | if (recovery_complete) |
||
1025 | return -EIO; |
||
2332 | Serge | 1026 | |
3031 | serge | 1027 | return -EAGAIN; |
1028 | } |
||
2332 | Serge | 1029 | |
3031 | serge | 1030 | return 0; |
1031 | } |
||
2332 | Serge | 1032 | |
3031 | serge | 1033 | /* |
1034 | * Compare seqno against outstanding lazy request. Emit a request if they are |
||
1035 | * equal. |
||
1036 | */ |
||
1037 | static int |
||
1038 | i915_gem_check_olr(struct intel_ring_buffer *ring, u32 seqno) |
||
1039 | { |
||
1040 | int ret; |
||
2332 | Serge | 1041 | |
3031 | serge | 1042 | BUG_ON(!mutex_is_locked(&ring->dev->struct_mutex)); |
2332 | Serge | 1043 | |
3031 | serge | 1044 | ret = 0; |
1045 | if (seqno == ring->outstanding_lazy_request) |
||
1046 | ret = i915_add_request(ring, NULL, NULL); |
||
2332 | Serge | 1047 | |
3031 | serge | 1048 | return ret; |
1049 | } |
||
2332 | Serge | 1050 | |
3031 | serge | 1051 | /** |
1052 | * __wait_seqno - wait until execution of seqno has finished |
||
1053 | * @ring: the ring expected to report seqno |
||
1054 | * @seqno: duh! |
||
1055 | * @interruptible: do an interruptible wait (normally yes) |
||
1056 | * @timeout: in - how long to wait (NULL forever); out - how much time remaining |
||
1057 | * |
||
1058 | * Returns 0 if the seqno was found within the alloted time. Else returns the |
||
1059 | * errno with remaining time filled in timeout argument. |
||
1060 | */ |
||
1061 | static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno, |
||
1062 | bool interruptible, struct timespec *timeout) |
||
1063 | { |
||
1064 | drm_i915_private_t *dev_priv = ring->dev->dev_private; |
||
1065 | struct timespec before, now, wait_time={1,0}; |
||
1066 | unsigned long timeout_jiffies; |
||
1067 | long end; |
||
1068 | bool wait_forever = true; |
||
1069 | int ret; |
||
2332 | Serge | 1070 | |
3031 | serge | 1071 | if (i915_seqno_passed(ring->get_seqno(ring, true), seqno)) |
1072 | return 0; |
||
2332 | Serge | 1073 | |
3031 | serge | 1074 | trace_i915_gem_request_wait_begin(ring, seqno); |
2332 | Serge | 1075 | |
3031 | serge | 1076 | if (timeout != NULL) { |
1077 | wait_time = *timeout; |
||
1078 | wait_forever = false; |
||
1079 | } |
||
2332 | Serge | 1080 | |
3031 | serge | 1081 | // timeout_jiffies = timespec_to_jiffies(&wait_time); |
2332 | Serge | 1082 | |
3031 | serge | 1083 | if (WARN_ON(!ring->irq_get(ring))) |
1084 | return -ENODEV; |
||
1085 | #if 0 |
||
2332 | Serge | 1086 | |
3031 | serge | 1087 | /* Record current time in case interrupted by signal, or wedged * */ |
1088 | getrawmonotonic(&before); |
||
2332 | Serge | 1089 | |
3031 | serge | 1090 | #define EXIT_COND \ |
1091 | (i915_seqno_passed(ring->get_seqno(ring, false), seqno) || \ |
||
1092 | atomic_read(&dev_priv->mm.wedged)) |
||
1093 | do { |
||
1094 | end = wait_event_timeout(ring->irq_queue, EXIT_COND, |
||
1095 | timeout_jiffies); |
||
2332 | Serge | 1096 | |
3031 | serge | 1097 | ret = i915_gem_check_wedge(dev_priv, interruptible); |
1098 | if (ret) |
||
1099 | end = ret; |
||
1100 | } while (end == 0 && wait_forever); |
||
2332 | Serge | 1101 | |
3031 | serge | 1102 | getrawmonotonic(&now); |
2332 | Serge | 1103 | |
3031 | serge | 1104 | ring->irq_put(ring); |
1105 | trace_i915_gem_request_wait_end(ring, seqno); |
||
1106 | #undef EXIT_COND |
||
2332 | Serge | 1107 | |
3031 | serge | 1108 | if (timeout) { |
1109 | // struct timespec sleep_time = timespec_sub(now, before); |
||
1110 | // *timeout = timespec_sub(*timeout, sleep_time); |
||
1111 | } |
||
2332 | Serge | 1112 | |
3031 | serge | 1113 | switch (end) { |
1114 | case -EIO: |
||
1115 | case -EAGAIN: /* Wedged */ |
||
1116 | case -ERESTARTSYS: /* Signal */ |
||
1117 | return (int)end; |
||
1118 | case 0: /* Timeout */ |
||
1119 | // if (timeout) |
||
1120 | // set_normalized_timespec(timeout, 0, 0); |
||
1121 | return -ETIME; |
||
1122 | default: /* Completed */ |
||
1123 | WARN_ON(end < 0); /* We're not aware of other errors */ |
||
1124 | return 0; |
||
1125 | } |
||
1126 | #endif |
||
2332 | Serge | 1127 | |
3031 | serge | 1128 | #define EXIT_COND \ |
1129 | (i915_seqno_passed(ring->get_seqno(ring, false), seqno) || \ |
||
1130 | atomic_read(&dev_priv->mm.wedged)) |
||
1131 | wait_event(ring->irq_queue, EXIT_COND); |
||
1132 | #undef EXIT_COND |
||
1133 | ring->irq_put(ring); |
||
2332 | Serge | 1134 | |
3031 | serge | 1135 | return 0; |
1136 | } |
||
2332 | Serge | 1137 | |
3031 | serge | 1138 | /** |
1139 | * Waits for a sequence number to be signaled, and cleans up the |
||
1140 | * request and object lists appropriately for that event. |
||
1141 | */ |
||
1142 | int |
||
1143 | i915_wait_seqno(struct intel_ring_buffer *ring, uint32_t seqno) |
||
1144 | { |
||
1145 | struct drm_device *dev = ring->dev; |
||
1146 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
1147 | bool interruptible = dev_priv->mm.interruptible; |
||
1148 | int ret; |
||
2332 | Serge | 1149 | |
3031 | serge | 1150 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); |
1151 | BUG_ON(seqno == 0); |
||
2332 | Serge | 1152 | |
3031 | serge | 1153 | ret = i915_gem_check_wedge(dev_priv, interruptible); |
1154 | if (ret) |
||
1155 | return ret; |
||
2332 | Serge | 1156 | |
3031 | serge | 1157 | ret = i915_gem_check_olr(ring, seqno); |
1158 | if (ret) |
||
1159 | return ret; |
||
2332 | Serge | 1160 | |
3031 | serge | 1161 | return __wait_seqno(ring, seqno, interruptible, NULL); |
1162 | } |
||
2332 | Serge | 1163 | |
3031 | serge | 1164 | /** |
1165 | * Ensures that all rendering to the object has completed and the object is |
||
1166 | * safe to unbind from the GTT or access from the CPU. |
||
1167 | */ |
||
1168 | static __must_check int |
||
1169 | i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj, |
||
1170 | bool readonly) |
||
1171 | { |
||
1172 | struct intel_ring_buffer *ring = obj->ring; |
||
1173 | u32 seqno; |
||
1174 | int ret; |
||
2332 | Serge | 1175 | |
3031 | serge | 1176 | seqno = readonly ? obj->last_write_seqno : obj->last_read_seqno; |
1177 | if (seqno == 0) |
||
1178 | return 0; |
||
2332 | Serge | 1179 | |
3031 | serge | 1180 | ret = i915_wait_seqno(ring, seqno); |
1181 | if (ret) |
||
1182 | return ret; |
||
2332 | Serge | 1183 | |
3031 | serge | 1184 | i915_gem_retire_requests_ring(ring); |
2332 | Serge | 1185 | |
3031 | serge | 1186 | /* Manually manage the write flush as we may have not yet |
1187 | * retired the buffer. |
||
1188 | */ |
||
1189 | if (obj->last_write_seqno && |
||
1190 | i915_seqno_passed(seqno, obj->last_write_seqno)) { |
||
1191 | obj->last_write_seqno = 0; |
||
1192 | obj->base.write_domain &= ~I915_GEM_GPU_DOMAINS; |
||
1193 | } |
||
2332 | Serge | 1194 | |
3031 | serge | 1195 | return 0; |
1196 | } |
||
2332 | Serge | 1197 | |
1198 | |||
1199 | |||
1200 | |||
1201 | |||
1202 | |||
1203 | |||
1204 | |||
1205 | |||
1206 | |||
1207 | |||
1208 | |||
1209 | |||
1210 | |||
1211 | |||
1212 | |||
1213 | |||
1214 | |||
1215 | |||
1216 | |||
1217 | |||
1218 | |||
1219 | |||
1220 | |||
1221 | |||
1222 | |||
1223 | |||
1224 | |||
1225 | |||
1226 | |||
1227 | |||
1228 | |||
1229 | |||
1230 | |||
1231 | |||
1232 | |||
1233 | |||
3031 | serge | 1234 | |
1235 | |||
1236 | |||
1237 | |||
1238 | |||
1239 | |||
1240 | /** |
||
1241 | * i915_gem_release_mmap - remove physical page mappings |
||
1242 | * @obj: obj in question |
||
1243 | * |
||
1244 | * Preserve the reservation of the mmapping with the DRM core code, but |
||
1245 | * relinquish ownership of the pages back to the system. |
||
1246 | * |
||
1247 | * It is vital that we remove the page mapping if we have mapped a tiled |
||
1248 | * object through the GTT and then lose the fence register due to |
||
1249 | * resource pressure. Similarly if the object has been moved out of the |
||
1250 | * aperture, than pages mapped into userspace must be revoked. Removing the |
||
1251 | * mapping will then trigger a page fault on the next user access, allowing |
||
1252 | * fixup by i915_gem_fault(). |
||
1253 | */ |
||
1254 | void |
||
1255 | i915_gem_release_mmap(struct drm_i915_gem_object *obj) |
||
1256 | { |
||
1257 | if (!obj->fault_mappable) |
||
1258 | return; |
||
1259 | |||
1260 | if (obj->base.dev->dev_mapping) |
||
1261 | // unmap_mapping_range(obj->base.dev->dev_mapping, |
||
1262 | // (loff_t)obj->base.map_list.hash.key< |
||
1263 | // obj->base.size, 1); |
||
1264 | |||
1265 | obj->fault_mappable = false; |
||
1266 | } |
||
1267 | |||
2332 | Serge | 1268 | static uint32_t |
1269 | i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode) |
||
1270 | { |
||
1271 | uint32_t gtt_size; |
||
1272 | |||
1273 | if (INTEL_INFO(dev)->gen >= 4 || |
||
1274 | tiling_mode == I915_TILING_NONE) |
||
1275 | return size; |
||
1276 | |||
1277 | /* Previous chips need a power-of-two fence region when tiling */ |
||
1278 | if (INTEL_INFO(dev)->gen == 3) |
||
1279 | gtt_size = 1024*1024; |
||
1280 | else |
||
1281 | gtt_size = 512*1024; |
||
1282 | |||
1283 | while (gtt_size < size) |
||
1284 | gtt_size <<= 1; |
||
1285 | |||
1286 | return gtt_size; |
||
1287 | } |
||
1288 | |||
1289 | /** |
||
1290 | * i915_gem_get_gtt_alignment - return required GTT alignment for an object |
||
1291 | * @obj: object to check |
||
1292 | * |
||
1293 | * Return the required GTT alignment for an object, taking into account |
||
1294 | * potential fence register mapping. |
||
1295 | */ |
||
1296 | static uint32_t |
||
1297 | i915_gem_get_gtt_alignment(struct drm_device *dev, |
||
1298 | uint32_t size, |
||
1299 | int tiling_mode) |
||
1300 | { |
||
1301 | /* |
||
1302 | * Minimum alignment is 4k (GTT page size), but might be greater |
||
1303 | * if a fence register is needed for the object. |
||
1304 | */ |
||
1305 | if (INTEL_INFO(dev)->gen >= 4 || |
||
1306 | tiling_mode == I915_TILING_NONE) |
||
1307 | return 4096; |
||
1308 | |||
1309 | /* |
||
1310 | * Previous chips need to be aligned to the size of the smallest |
||
1311 | * fence register that can contain the object. |
||
1312 | */ |
||
1313 | return i915_gem_get_gtt_size(dev, size, tiling_mode); |
||
1314 | } |
||
1315 | |||
1316 | /** |
||
1317 | * i915_gem_get_unfenced_gtt_alignment - return required GTT alignment for an |
||
1318 | * unfenced object |
||
1319 | * @dev: the device |
||
1320 | * @size: size of the object |
||
1321 | * @tiling_mode: tiling mode of the object |
||
1322 | * |
||
1323 | * Return the required GTT alignment for an object, only taking into account |
||
1324 | * unfenced tiled surface requirements. |
||
1325 | */ |
||
1326 | uint32_t |
||
1327 | i915_gem_get_unfenced_gtt_alignment(struct drm_device *dev, |
||
1328 | uint32_t size, |
||
1329 | int tiling_mode) |
||
1330 | { |
||
1331 | /* |
||
1332 | * Minimum alignment is 4k (GTT page size) for sane hw. |
||
1333 | */ |
||
1334 | if (INTEL_INFO(dev)->gen >= 4 || IS_G33(dev) || |
||
1335 | tiling_mode == I915_TILING_NONE) |
||
1336 | return 4096; |
||
1337 | |||
1338 | /* Previous hardware however needs to be aligned to a power-of-two |
||
1339 | * tile height. The simplest method for determining this is to reuse |
||
1340 | * the power-of-tile object size. |
||
1341 | */ |
||
1342 | return i915_gem_get_gtt_size(dev, size, tiling_mode); |
||
1343 | } |
||
1344 | |||
3031 | serge | 1345 | /* Immediately discard the backing storage */ |
1346 | static void |
||
1347 | i915_gem_object_truncate(struct drm_i915_gem_object *obj) |
||
1348 | { |
||
1349 | // struct inode *inode; |
||
2332 | Serge | 1350 | |
3031 | serge | 1351 | // i915_gem_object_free_mmap_offset(obj); |
2332 | Serge | 1352 | |
3031 | serge | 1353 | // if (obj->base.filp == NULL) |
1354 | // return; |
||
2332 | Serge | 1355 | |
3031 | serge | 1356 | /* Our goal here is to return as much of the memory as |
1357 | * is possible back to the system as we are called from OOM. |
||
1358 | * To do this we must instruct the shmfs to drop all of its |
||
1359 | * backing pages, *now*. |
||
1360 | */ |
||
1361 | // inode = obj->base.filp->f_path.dentry->d_inode; |
||
1362 | // shmem_truncate_range(inode, 0, (loff_t)-1); |
||
2332 | Serge | 1363 | |
3031 | serge | 1364 | obj->madv = __I915_MADV_PURGED; |
1365 | } |
||
2332 | Serge | 1366 | |
3031 | serge | 1367 | static inline int |
1368 | i915_gem_object_is_purgeable(struct drm_i915_gem_object *obj) |
||
1369 | { |
||
1370 | return obj->madv == I915_MADV_DONTNEED; |
||
1371 | } |
||
2332 | Serge | 1372 | |
3031 | serge | 1373 | static void |
1374 | i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj) |
||
1375 | { |
||
3243 | Serge | 1376 | int page_count = obj->base.size / PAGE_SIZE; |
1377 | struct scatterlist *sg; |
||
3031 | serge | 1378 | int ret, i; |
2332 | Serge | 1379 | |
3031 | serge | 1380 | BUG_ON(obj->madv == __I915_MADV_PURGED); |
2332 | Serge | 1381 | |
3031 | serge | 1382 | ret = i915_gem_object_set_to_cpu_domain(obj, true); |
1383 | if (ret) { |
||
1384 | /* In the event of a disaster, abandon all caches and |
||
1385 | * hope for the best. |
||
1386 | */ |
||
1387 | WARN_ON(ret != -EIO); |
||
1388 | i915_gem_clflush_object(obj); |
||
1389 | obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
||
1390 | } |
||
2332 | Serge | 1391 | |
3031 | serge | 1392 | if (obj->madv == I915_MADV_DONTNEED) |
1393 | obj->dirty = 0; |
||
2332 | Serge | 1394 | |
3243 | Serge | 1395 | for_each_sg(obj->pages->sgl, sg, page_count, i) { |
1396 | struct page *page = sg_page(sg); |
||
2332 | Serge | 1397 | |
3243 | Serge | 1398 | |
1399 | |||
1400 | page_cache_release(page); |
||
1401 | } |
||
1402 | //DRM_DEBUG_KMS("%s release %d pages\n", __FUNCTION__, page_count); |
||
3031 | serge | 1403 | obj->dirty = 0; |
3243 | Serge | 1404 | |
1405 | sg_free_table(obj->pages); |
||
1406 | kfree(obj->pages); |
||
3031 | serge | 1407 | } |
2332 | Serge | 1408 | |
3031 | serge | 1409 | static int |
1410 | i915_gem_object_put_pages(struct drm_i915_gem_object *obj) |
||
1411 | { |
||
1412 | const struct drm_i915_gem_object_ops *ops = obj->ops; |
||
2332 | Serge | 1413 | |
3243 | Serge | 1414 | if (obj->pages == NULL) |
3031 | serge | 1415 | return 0; |
2332 | Serge | 1416 | |
3031 | serge | 1417 | BUG_ON(obj->gtt_space); |
1418 | |||
1419 | if (obj->pages_pin_count) |
||
1420 | return -EBUSY; |
||
1421 | |||
3243 | Serge | 1422 | /* ->put_pages might need to allocate memory for the bit17 swizzle |
1423 | * array, hence protect them from being reaped by removing them from gtt |
||
1424 | * lists early. */ |
||
1425 | list_del(&obj->gtt_list); |
||
1426 | |||
3031 | serge | 1427 | ops->put_pages(obj); |
3243 | Serge | 1428 | obj->pages = NULL; |
3031 | serge | 1429 | |
1430 | if (i915_gem_object_is_purgeable(obj)) |
||
1431 | i915_gem_object_truncate(obj); |
||
1432 | |||
1433 | return 0; |
||
1434 | } |
||
1435 | |||
1436 | |||
1437 | |||
1438 | |||
1439 | |||
1440 | |||
1441 | |||
1442 | |||
2332 | Serge | 1443 | static int |
3031 | serge | 1444 | i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) |
2332 | Serge | 1445 | { |
3243 | Serge | 1446 | int page_count, i; |
1447 | struct sg_table *st; |
||
1448 | struct scatterlist *sg; |
||
1449 | struct page *page; |
||
1450 | gfp_t gfp; |
||
2332 | Serge | 1451 | |
3243 | Serge | 1452 | /* Assert that the object is not currently in any GPU domain. As it |
1453 | * wasn't in the GTT, there shouldn't be any way it could have been in |
||
1454 | * a GPU cache |
||
2332 | Serge | 1455 | */ |
3243 | Serge | 1456 | BUG_ON(obj->base.read_domains & I915_GEM_GPU_DOMAINS); |
1457 | BUG_ON(obj->base.write_domain & I915_GEM_GPU_DOMAINS); |
||
1458 | |||
1459 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
||
1460 | if (st == NULL) |
||
1461 | return -ENOMEM; |
||
1462 | |||
2332 | Serge | 1463 | page_count = obj->base.size / PAGE_SIZE; |
3243 | Serge | 1464 | if (sg_alloc_table(st, page_count, GFP_KERNEL)) { |
1465 | sg_free_table(st); |
||
1466 | kfree(st); |
||
2332 | Serge | 1467 | return -ENOMEM; |
3243 | Serge | 1468 | } |
2332 | Serge | 1469 | |
3243 | Serge | 1470 | /* Get the list of pages out of our struct file. They'll be pinned |
1471 | * at this point until we release them. |
||
1472 | * |
||
1473 | * Fail silently without starting the shrinker |
||
1474 | */ |
||
1475 | for_each_sg(st->sgl, sg, page_count, i) { |
||
3031 | serge | 1476 | page = AllocPage(); // oh-oh |
1477 | if ( page == 0 ) |
||
2332 | Serge | 1478 | goto err_pages; |
1479 | |||
3243 | Serge | 1480 | sg_set_page(sg, page, PAGE_SIZE, 0); |
1481 | } |
||
3031 | serge | 1482 | |
3243 | Serge | 1483 | obj->pages = st; |
3031 | serge | 1484 | |
3243 | Serge | 1485 | // DRM_DEBUG_KMS("%s alloc %d pages\n", __FUNCTION__, page_count); |
2332 | Serge | 1486 | |
1487 | return 0; |
||
1488 | |||
1489 | err_pages: |
||
3243 | Serge | 1490 | for_each_sg(st->sgl, sg, i, page_count) |
1491 | page_cache_release(sg_page(sg)); |
||
1492 | sg_free_table(st); |
||
1493 | kfree(st); |
||
1494 | return PTR_ERR(page); |
||
2332 | Serge | 1495 | } |
1496 | |||
3031 | serge | 1497 | /* Ensure that the associated pages are gathered from the backing storage |
1498 | * and pinned into our object. i915_gem_object_get_pages() may be called |
||
1499 | * multiple times before they are released by a single call to |
||
1500 | * i915_gem_object_put_pages() - once the pages are no longer referenced |
||
1501 | * either as a result of memory pressure (reaping pages under the shrinker) |
||
1502 | * or as the object is itself released. |
||
1503 | */ |
||
1504 | int |
||
1505 | i915_gem_object_get_pages(struct drm_i915_gem_object *obj) |
||
2332 | Serge | 1506 | { |
3031 | serge | 1507 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
1508 | const struct drm_i915_gem_object_ops *ops = obj->ops; |
||
1509 | int ret; |
||
2332 | Serge | 1510 | |
3243 | Serge | 1511 | if (obj->pages) |
3031 | serge | 1512 | return 0; |
2332 | Serge | 1513 | |
3031 | serge | 1514 | BUG_ON(obj->pages_pin_count); |
2332 | Serge | 1515 | |
3031 | serge | 1516 | ret = ops->get_pages(obj); |
1517 | if (ret) |
||
1518 | return ret; |
||
2344 | Serge | 1519 | |
3031 | serge | 1520 | list_add_tail(&obj->gtt_list, &dev_priv->mm.unbound_list); |
3243 | Serge | 1521 | return 0; |
2332 | Serge | 1522 | } |
1523 | |||
1524 | void |
||
1525 | i915_gem_object_move_to_active(struct drm_i915_gem_object *obj, |
||
3243 | Serge | 1526 | struct intel_ring_buffer *ring) |
2332 | Serge | 1527 | { |
1528 | struct drm_device *dev = obj->base.dev; |
||
1529 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
3243 | Serge | 1530 | u32 seqno = intel_ring_get_seqno(ring); |
2332 | Serge | 1531 | |
1532 | BUG_ON(ring == NULL); |
||
1533 | obj->ring = ring; |
||
1534 | |||
1535 | /* Add a reference if we're newly entering the active list. */ |
||
1536 | if (!obj->active) { |
||
2344 | Serge | 1537 | drm_gem_object_reference(&obj->base); |
2332 | Serge | 1538 | obj->active = 1; |
1539 | } |
||
1540 | |||
1541 | /* Move from whatever list we were on to the tail of execution. */ |
||
1542 | list_move_tail(&obj->mm_list, &dev_priv->mm.active_list); |
||
1543 | list_move_tail(&obj->ring_list, &ring->active_list); |
||
1544 | |||
3031 | serge | 1545 | obj->last_read_seqno = seqno; |
1546 | |||
2332 | Serge | 1547 | if (obj->fenced_gpu_access) { |
3031 | serge | 1548 | obj->last_fenced_seqno = seqno; |
1549 | |||
1550 | /* Bump MRU to take account of the delayed flush */ |
||
1551 | if (obj->fence_reg != I915_FENCE_REG_NONE) { |
||
2332 | Serge | 1552 | struct drm_i915_fence_reg *reg; |
1553 | |||
1554 | reg = &dev_priv->fence_regs[obj->fence_reg]; |
||
3031 | serge | 1555 | list_move_tail(®->lru_list, |
1556 | &dev_priv->mm.fence_list); |
||
1557 | } |
||
2332 | Serge | 1558 | } |
1559 | } |
||
1560 | |||
2344 | Serge | 1561 | static void |
3031 | serge | 1562 | i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj) |
2344 | Serge | 1563 | { |
1564 | struct drm_device *dev = obj->base.dev; |
||
3031 | serge | 1565 | struct drm_i915_private *dev_priv = dev->dev_private; |
2332 | Serge | 1566 | |
3031 | serge | 1567 | BUG_ON(obj->base.write_domain & ~I915_GEM_GPU_DOMAINS); |
2344 | Serge | 1568 | BUG_ON(!obj->active); |
2332 | Serge | 1569 | |
3031 | serge | 1570 | if (obj->pin_count) /* are we a framebuffer? */ |
1571 | intel_mark_fb_idle(obj); |
||
2344 | Serge | 1572 | |
2352 | Serge | 1573 | list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list); |
2344 | Serge | 1574 | |
3031 | serge | 1575 | list_del_init(&obj->ring_list); |
2352 | Serge | 1576 | obj->ring = NULL; |
2344 | Serge | 1577 | |
3031 | serge | 1578 | obj->last_read_seqno = 0; |
1579 | obj->last_write_seqno = 0; |
||
1580 | obj->base.write_domain = 0; |
||
1581 | |||
1582 | obj->last_fenced_seqno = 0; |
||
2352 | Serge | 1583 | obj->fenced_gpu_access = false; |
2344 | Serge | 1584 | |
2352 | Serge | 1585 | obj->active = 0; |
1586 | drm_gem_object_unreference(&obj->base); |
||
1587 | |||
1588 | WARN_ON(i915_verify_lists(dev)); |
||
1589 | } |
||
1590 | |||
3243 | Serge | 1591 | static int |
1592 | i915_gem_handle_seqno_wrap(struct drm_device *dev) |
||
2344 | Serge | 1593 | { |
3243 | Serge | 1594 | struct drm_i915_private *dev_priv = dev->dev_private; |
1595 | struct intel_ring_buffer *ring; |
||
1596 | int ret, i, j; |
||
2344 | Serge | 1597 | |
3243 | Serge | 1598 | /* The hardware uses various monotonic 32-bit counters, if we |
1599 | * detect that they will wraparound we need to idle the GPU |
||
1600 | * and reset those counters. |
||
1601 | */ |
||
1602 | ret = 0; |
||
1603 | for_each_ring(ring, dev_priv, i) { |
||
1604 | for (j = 0; j < ARRAY_SIZE(ring->sync_seqno); j++) |
||
1605 | ret |= ring->sync_seqno[j] != 0; |
||
1606 | } |
||
1607 | if (ret == 0) |
||
1608 | return ret; |
||
2344 | Serge | 1609 | |
3243 | Serge | 1610 | ret = i915_gpu_idle(dev); |
1611 | if (ret) |
||
1612 | return ret; |
||
1613 | |||
1614 | i915_gem_retire_requests(dev); |
||
1615 | for_each_ring(ring, dev_priv, i) { |
||
1616 | for (j = 0; j < ARRAY_SIZE(ring->sync_seqno); j++) |
||
1617 | ring->sync_seqno[j] = 0; |
||
1618 | } |
||
1619 | |||
1620 | return 0; |
||
2344 | Serge | 1621 | } |
1622 | |||
3243 | Serge | 1623 | int |
1624 | i915_gem_get_seqno(struct drm_device *dev, u32 *seqno) |
||
2344 | Serge | 1625 | { |
3243 | Serge | 1626 | struct drm_i915_private *dev_priv = dev->dev_private; |
2344 | Serge | 1627 | |
3243 | Serge | 1628 | /* reserve 0 for non-seqno */ |
1629 | if (dev_priv->next_seqno == 0) { |
||
1630 | int ret = i915_gem_handle_seqno_wrap(dev); |
||
1631 | if (ret) |
||
1632 | return ret; |
||
1633 | |||
1634 | dev_priv->next_seqno = 1; |
||
1635 | } |
||
1636 | |||
1637 | *seqno = dev_priv->next_seqno++; |
||
1638 | return 0; |
||
2332 | Serge | 1639 | } |
1640 | |||
2352 | Serge | 1641 | int |
1642 | i915_add_request(struct intel_ring_buffer *ring, |
||
1643 | struct drm_file *file, |
||
3031 | serge | 1644 | u32 *out_seqno) |
2352 | Serge | 1645 | { |
1646 | drm_i915_private_t *dev_priv = ring->dev->dev_private; |
||
3031 | serge | 1647 | struct drm_i915_gem_request *request; |
1648 | u32 request_ring_position; |
||
2352 | Serge | 1649 | int was_empty; |
1650 | int ret; |
||
2332 | Serge | 1651 | |
3031 | serge | 1652 | /* |
1653 | * Emit any outstanding flushes - execbuf can fail to emit the flush |
||
1654 | * after having emitted the batchbuffer command. Hence we need to fix |
||
1655 | * things up similar to emitting the lazy request. The difference here |
||
1656 | * is that the flush _must_ happen before the next request, no matter |
||
1657 | * what. |
||
1658 | */ |
||
1659 | ret = intel_ring_flush_all_caches(ring); |
||
1660 | if (ret) |
||
1661 | return ret; |
||
2332 | Serge | 1662 | |
3031 | serge | 1663 | request = kmalloc(sizeof(*request), GFP_KERNEL); |
1664 | if (request == NULL) |
||
1665 | return -ENOMEM; |
||
1666 | |||
1667 | |||
1668 | /* Record the position of the start of the request so that |
||
1669 | * should we detect the updated seqno part-way through the |
||
1670 | * GPU processing the request, we never over-estimate the |
||
1671 | * position of the head. |
||
1672 | */ |
||
1673 | request_ring_position = intel_ring_get_tail(ring); |
||
1674 | |||
3243 | Serge | 1675 | ret = ring->add_request(ring); |
3031 | serge | 1676 | if (ret) { |
1677 | kfree(request); |
||
2352 | Serge | 1678 | return ret; |
3031 | serge | 1679 | } |
2332 | Serge | 1680 | |
3243 | Serge | 1681 | request->seqno = intel_ring_get_seqno(ring); |
2352 | Serge | 1682 | request->ring = ring; |
3031 | serge | 1683 | request->tail = request_ring_position; |
1684 | request->emitted_jiffies = GetTimerTicks(); |
||
2352 | Serge | 1685 | was_empty = list_empty(&ring->request_list); |
1686 | list_add_tail(&request->list, &ring->request_list); |
||
3031 | serge | 1687 | request->file_priv = NULL; |
2332 | Serge | 1688 | |
1689 | |||
3031 | serge | 1690 | ring->outstanding_lazy_request = 0; |
2332 | Serge | 1691 | |
2360 | Serge | 1692 | if (!dev_priv->mm.suspended) { |
1693 | if (i915_enable_hangcheck) { |
||
2352 | Serge | 1694 | // mod_timer(&dev_priv->hangcheck_timer, |
1695 | // jiffies + |
||
1696 | // msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD)); |
||
2360 | Serge | 1697 | } |
3031 | serge | 1698 | if (was_empty) { |
2360 | Serge | 1699 | queue_delayed_work(dev_priv->wq, |
1700 | &dev_priv->mm.retire_work, HZ); |
||
3031 | serge | 1701 | intel_mark_busy(dev_priv->dev); |
1702 | } |
||
2360 | Serge | 1703 | } |
3031 | serge | 1704 | |
1705 | if (out_seqno) |
||
3243 | Serge | 1706 | *out_seqno = request->seqno; |
2352 | Serge | 1707 | return 0; |
1708 | } |
||
2332 | Serge | 1709 | |
1710 | |||
1711 | |||
1712 | |||
3031 | serge | 1713 | static void i915_gem_reset_ring_lists(struct drm_i915_private *dev_priv, |
1714 | struct intel_ring_buffer *ring) |
||
1715 | { |
||
1716 | while (!list_empty(&ring->request_list)) { |
||
1717 | struct drm_i915_gem_request *request; |
||
2332 | Serge | 1718 | |
3031 | serge | 1719 | request = list_first_entry(&ring->request_list, |
1720 | struct drm_i915_gem_request, |
||
1721 | list); |
||
2332 | Serge | 1722 | |
3031 | serge | 1723 | list_del(&request->list); |
1724 | // i915_gem_request_remove_from_client(request); |
||
1725 | kfree(request); |
||
1726 | } |
||
2332 | Serge | 1727 | |
3031 | serge | 1728 | while (!list_empty(&ring->active_list)) { |
1729 | struct drm_i915_gem_object *obj; |
||
2332 | Serge | 1730 | |
3031 | serge | 1731 | obj = list_first_entry(&ring->active_list, |
1732 | struct drm_i915_gem_object, |
||
1733 | ring_list); |
||
2332 | Serge | 1734 | |
3031 | serge | 1735 | i915_gem_object_move_to_inactive(obj); |
1736 | } |
||
1737 | } |
||
2332 | Serge | 1738 | |
3031 | serge | 1739 | static void i915_gem_reset_fences(struct drm_device *dev) |
1740 | { |
||
1741 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
1742 | int i; |
||
2332 | Serge | 1743 | |
3031 | serge | 1744 | for (i = 0; i < dev_priv->num_fence_regs; i++) { |
1745 | struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i]; |
||
2332 | Serge | 1746 | |
3031 | serge | 1747 | i915_gem_write_fence(dev, i, NULL); |
2360 | Serge | 1748 | |
3031 | serge | 1749 | if (reg->obj) |
1750 | i915_gem_object_fence_lost(reg->obj); |
||
2360 | Serge | 1751 | |
3031 | serge | 1752 | reg->pin_count = 0; |
1753 | reg->obj = NULL; |
||
1754 | INIT_LIST_HEAD(®->lru_list); |
||
1755 | } |
||
2360 | Serge | 1756 | |
3031 | serge | 1757 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
1758 | } |
||
2360 | Serge | 1759 | |
3031 | serge | 1760 | void i915_gem_reset(struct drm_device *dev) |
1761 | { |
||
1762 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
1763 | struct drm_i915_gem_object *obj; |
||
1764 | struct intel_ring_buffer *ring; |
||
1765 | int i; |
||
2360 | Serge | 1766 | |
3031 | serge | 1767 | for_each_ring(ring, dev_priv, i) |
1768 | i915_gem_reset_ring_lists(dev_priv, ring); |
||
2360 | Serge | 1769 | |
3031 | serge | 1770 | /* Move everything out of the GPU domains to ensure we do any |
1771 | * necessary invalidation upon reuse. |
||
1772 | */ |
||
1773 | list_for_each_entry(obj, |
||
1774 | &dev_priv->mm.inactive_list, |
||
1775 | mm_list) |
||
1776 | { |
||
1777 | obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS; |
||
1778 | } |
||
2360 | Serge | 1779 | |
3031 | serge | 1780 | /* The fence registers are invalidated so clear them out */ |
1781 | i915_gem_reset_fences(dev); |
||
1782 | } |
||
2360 | Serge | 1783 | |
2352 | Serge | 1784 | /** |
1785 | * This function clears the request list as sequence numbers are passed. |
||
1786 | */ |
||
3031 | serge | 1787 | void |
2352 | Serge | 1788 | i915_gem_retire_requests_ring(struct intel_ring_buffer *ring) |
1789 | { |
||
1790 | uint32_t seqno; |
||
2332 | Serge | 1791 | |
2352 | Serge | 1792 | if (list_empty(&ring->request_list)) |
1793 | return; |
||
2332 | Serge | 1794 | |
2352 | Serge | 1795 | WARN_ON(i915_verify_lists(ring->dev)); |
2332 | Serge | 1796 | |
3031 | serge | 1797 | seqno = ring->get_seqno(ring, true); |
2332 | Serge | 1798 | |
2352 | Serge | 1799 | while (!list_empty(&ring->request_list)) { |
1800 | struct drm_i915_gem_request *request; |
||
2332 | Serge | 1801 | |
2352 | Serge | 1802 | request = list_first_entry(&ring->request_list, |
1803 | struct drm_i915_gem_request, |
||
1804 | list); |
||
2332 | Serge | 1805 | |
2352 | Serge | 1806 | if (!i915_seqno_passed(seqno, request->seqno)) |
1807 | break; |
||
2332 | Serge | 1808 | |
2352 | Serge | 1809 | trace_i915_gem_request_retire(ring, request->seqno); |
3031 | serge | 1810 | /* We know the GPU must have read the request to have |
1811 | * sent us the seqno + interrupt, so use the position |
||
1812 | * of tail of the request to update the last known position |
||
1813 | * of the GPU head. |
||
1814 | */ |
||
1815 | ring->last_retired_head = request->tail; |
||
2332 | Serge | 1816 | |
2352 | Serge | 1817 | list_del(&request->list); |
1818 | kfree(request); |
||
1819 | } |
||
2332 | Serge | 1820 | |
2352 | Serge | 1821 | /* Move any buffers on the active list that are no longer referenced |
1822 | * by the ringbuffer to the flushing/inactive lists as appropriate. |
||
1823 | */ |
||
1824 | while (!list_empty(&ring->active_list)) { |
||
1825 | struct drm_i915_gem_object *obj; |
||
2332 | Serge | 1826 | |
2352 | Serge | 1827 | obj = list_first_entry(&ring->active_list, |
1828 | struct drm_i915_gem_object, |
||
1829 | ring_list); |
||
2332 | Serge | 1830 | |
3031 | serge | 1831 | if (!i915_seqno_passed(seqno, obj->last_read_seqno)) |
2352 | Serge | 1832 | break; |
2332 | Serge | 1833 | |
2352 | Serge | 1834 | i915_gem_object_move_to_inactive(obj); |
1835 | } |
||
2332 | Serge | 1836 | |
2352 | Serge | 1837 | if (unlikely(ring->trace_irq_seqno && |
1838 | i915_seqno_passed(seqno, ring->trace_irq_seqno))) { |
||
1839 | ring->irq_put(ring); |
||
1840 | ring->trace_irq_seqno = 0; |
||
1841 | } |
||
2332 | Serge | 1842 | |
2352 | Serge | 1843 | WARN_ON(i915_verify_lists(ring->dev)); |
1844 | } |
||
2332 | Serge | 1845 | |
2352 | Serge | 1846 | void |
1847 | i915_gem_retire_requests(struct drm_device *dev) |
||
1848 | { |
||
1849 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
3031 | serge | 1850 | struct intel_ring_buffer *ring; |
2352 | Serge | 1851 | int i; |
2332 | Serge | 1852 | |
3031 | serge | 1853 | for_each_ring(ring, dev_priv, i) |
1854 | i915_gem_retire_requests_ring(ring); |
||
2352 | Serge | 1855 | } |
1856 | |||
2360 | Serge | 1857 | static void |
1858 | i915_gem_retire_work_handler(struct work_struct *work) |
||
1859 | { |
||
1860 | drm_i915_private_t *dev_priv; |
||
1861 | struct drm_device *dev; |
||
3031 | serge | 1862 | struct intel_ring_buffer *ring; |
2360 | Serge | 1863 | bool idle; |
1864 | int i; |
||
2352 | Serge | 1865 | |
2360 | Serge | 1866 | dev_priv = container_of(work, drm_i915_private_t, |
1867 | mm.retire_work.work); |
||
1868 | dev = dev_priv->dev; |
||
2352 | Serge | 1869 | |
2360 | Serge | 1870 | /* Come back later if the device is busy... */ |
1871 | if (!mutex_trylock(&dev->struct_mutex)) { |
||
1872 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); |
||
3243 | Serge | 1873 | return; |
2360 | Serge | 1874 | } |
2352 | Serge | 1875 | |
2360 | Serge | 1876 | i915_gem_retire_requests(dev); |
2352 | Serge | 1877 | |
2360 | Serge | 1878 | /* Send a periodic flush down the ring so we don't hold onto GEM |
1879 | * objects indefinitely. |
||
1880 | */ |
||
1881 | idle = true; |
||
3031 | serge | 1882 | for_each_ring(ring, dev_priv, i) { |
1883 | if (ring->gpu_caches_dirty) |
||
1884 | i915_add_request(ring, NULL, NULL); |
||
2352 | Serge | 1885 | |
2360 | Serge | 1886 | idle &= list_empty(&ring->request_list); |
1887 | } |
||
2352 | Serge | 1888 | |
2360 | Serge | 1889 | if (!dev_priv->mm.suspended && !idle) |
1890 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); |
||
3031 | serge | 1891 | if (idle) |
1892 | intel_mark_idle(dev); |
||
2360 | Serge | 1893 | |
1894 | mutex_unlock(&dev->struct_mutex); |
||
1895 | } |
||
1896 | |||
2344 | Serge | 1897 | /** |
3031 | serge | 1898 | * Ensures that an object will eventually get non-busy by flushing any required |
1899 | * write domains, emitting any outstanding lazy request and retiring and |
||
1900 | * completed requests. |
||
2352 | Serge | 1901 | */ |
3031 | serge | 1902 | static int |
1903 | i915_gem_object_flush_active(struct drm_i915_gem_object *obj) |
||
2352 | Serge | 1904 | { |
3031 | serge | 1905 | int ret; |
2352 | Serge | 1906 | |
3031 | serge | 1907 | if (obj->active) { |
1908 | ret = i915_gem_check_olr(obj->ring, obj->last_read_seqno); |
||
1909 | if (ret) |
||
1910 | return ret; |
||
2352 | Serge | 1911 | |
3031 | serge | 1912 | i915_gem_retire_requests_ring(obj->ring); |
1913 | } |
||
2352 | Serge | 1914 | |
3031 | serge | 1915 | return 0; |
1916 | } |
||
2352 | Serge | 1917 | |
3243 | Serge | 1918 | /** |
1919 | * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT |
||
1920 | * @DRM_IOCTL_ARGS: standard ioctl arguments |
||
1921 | * |
||
1922 | * Returns 0 if successful, else an error is returned with the remaining time in |
||
1923 | * the timeout parameter. |
||
1924 | * -ETIME: object is still busy after timeout |
||
1925 | * -ERESTARTSYS: signal interrupted the wait |
||
1926 | * -ENONENT: object doesn't exist |
||
1927 | * Also possible, but rare: |
||
1928 | * -EAGAIN: GPU wedged |
||
1929 | * -ENOMEM: damn |
||
1930 | * -ENODEV: Internal IRQ fail |
||
1931 | * -E?: The add request failed |
||
1932 | * |
||
1933 | * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any |
||
1934 | * non-zero timeout parameter the wait ioctl will wait for the given number of |
||
1935 | * nanoseconds on an object becoming unbusy. Since the wait itself does so |
||
1936 | * without holding struct_mutex the object may become re-busied before this |
||
1937 | * function completes. A similar but shorter * race condition exists in the busy |
||
1938 | * ioctl |
||
1939 | */ |
||
2352 | Serge | 1940 | |
1941 | |||
1942 | |||
1943 | |||
1944 | |||
1945 | |||
1946 | |||
1947 | |||
1948 | |||
3243 | Serge | 1949 | |
1950 | |||
1951 | |||
1952 | |||
1953 | |||
2352 | Serge | 1954 | /** |
3031 | serge | 1955 | * i915_gem_object_sync - sync an object to a ring. |
1956 | * |
||
1957 | * @obj: object which may be in use on another ring. |
||
1958 | * @to: ring we wish to use the object on. May be NULL. |
||
1959 | * |
||
1960 | * This code is meant to abstract object synchronization with the GPU. |
||
1961 | * Calling with NULL implies synchronizing the object with the CPU |
||
1962 | * rather than a particular GPU ring. |
||
1963 | * |
||
1964 | * Returns 0 if successful, else propagates up the lower layer error. |
||
2344 | Serge | 1965 | */ |
1966 | int |
||
3031 | serge | 1967 | i915_gem_object_sync(struct drm_i915_gem_object *obj, |
1968 | struct intel_ring_buffer *to) |
||
2344 | Serge | 1969 | { |
3031 | serge | 1970 | struct intel_ring_buffer *from = obj->ring; |
1971 | u32 seqno; |
||
1972 | int ret, idx; |
||
2332 | Serge | 1973 | |
3031 | serge | 1974 | if (from == NULL || to == from) |
1975 | return 0; |
||
2332 | Serge | 1976 | |
3031 | serge | 1977 | if (to == NULL || !i915_semaphore_is_enabled(obj->base.dev)) |
1978 | return i915_gem_object_wait_rendering(obj, false); |
||
2332 | Serge | 1979 | |
3031 | serge | 1980 | idx = intel_ring_sync_index(from, to); |
1981 | |||
1982 | seqno = obj->last_read_seqno; |
||
1983 | if (seqno <= from->sync_seqno[idx]) |
||
1984 | return 0; |
||
1985 | |||
1986 | ret = i915_gem_check_olr(obj->ring, seqno); |
||
1987 | if (ret) |
||
1988 | return ret; |
||
1989 | |||
1990 | ret = to->sync_to(to, from, seqno); |
||
1991 | if (!ret) |
||
3243 | Serge | 1992 | /* We use last_read_seqno because sync_to() |
1993 | * might have just caused seqno wrap under |
||
1994 | * the radar. |
||
1995 | */ |
||
1996 | from->sync_seqno[idx] = obj->last_read_seqno; |
||
3031 | serge | 1997 | |
1998 | return ret; |
||
2344 | Serge | 1999 | } |
2332 | Serge | 2000 | |
2344 | Serge | 2001 | static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj) |
2002 | { |
||
2003 | u32 old_write_domain, old_read_domains; |
||
2332 | Serge | 2004 | |
2344 | Serge | 2005 | /* Act a barrier for all accesses through the GTT */ |
2006 | mb(); |
||
2332 | Serge | 2007 | |
2344 | Serge | 2008 | /* Force a pagefault for domain tracking on next user access */ |
2009 | // i915_gem_release_mmap(obj); |
||
2332 | Serge | 2010 | |
2344 | Serge | 2011 | if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) |
2012 | return; |
||
2332 | Serge | 2013 | |
2344 | Serge | 2014 | old_read_domains = obj->base.read_domains; |
2015 | old_write_domain = obj->base.write_domain; |
||
2351 | Serge | 2016 | |
2344 | Serge | 2017 | obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT; |
2018 | obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT; |
||
2332 | Serge | 2019 | |
2351 | Serge | 2020 | trace_i915_gem_object_change_domain(obj, |
2021 | old_read_domains, |
||
2022 | old_write_domain); |
||
2344 | Serge | 2023 | } |
2332 | Serge | 2024 | |
2344 | Serge | 2025 | /** |
2026 | * Unbinds an object from the GTT aperture. |
||
2027 | */ |
||
2028 | int |
||
2029 | i915_gem_object_unbind(struct drm_i915_gem_object *obj) |
||
2030 | { |
||
3031 | serge | 2031 | drm_i915_private_t *dev_priv = obj->base.dev->dev_private; |
2344 | Serge | 2032 | int ret = 0; |
2332 | Serge | 2033 | |
2344 | Serge | 2034 | if (obj->gtt_space == NULL) |
2035 | return 0; |
||
2332 | Serge | 2036 | |
3031 | serge | 2037 | if (obj->pin_count) |
2038 | return -EBUSY; |
||
2332 | Serge | 2039 | |
3243 | Serge | 2040 | BUG_ON(obj->pages == NULL); |
3031 | serge | 2041 | |
2344 | Serge | 2042 | ret = i915_gem_object_finish_gpu(obj); |
3031 | serge | 2043 | if (ret) |
2344 | Serge | 2044 | return ret; |
2045 | /* Continue on if we fail due to EIO, the GPU is hung so we |
||
2046 | * should be safe and we need to cleanup or else we might |
||
2047 | * cause memory corruption through use-after-free. |
||
2048 | */ |
||
2332 | Serge | 2049 | |
2344 | Serge | 2050 | i915_gem_object_finish_gtt(obj); |
2332 | Serge | 2051 | |
2344 | Serge | 2052 | /* release the fence reg _after_ flushing */ |
2053 | ret = i915_gem_object_put_fence(obj); |
||
3031 | serge | 2054 | if (ret) |
2344 | Serge | 2055 | return ret; |
2332 | Serge | 2056 | |
2351 | Serge | 2057 | trace_i915_gem_object_unbind(obj); |
2332 | Serge | 2058 | |
3031 | serge | 2059 | if (obj->has_global_gtt_mapping) |
3243 | Serge | 2060 | i915_gem_gtt_unbind_object(obj); |
3031 | serge | 2061 | if (obj->has_aliasing_ppgtt_mapping) { |
2062 | i915_ppgtt_unbind_object(dev_priv->mm.aliasing_ppgtt, obj); |
||
2063 | obj->has_aliasing_ppgtt_mapping = 0; |
||
2064 | } |
||
2065 | i915_gem_gtt_finish_object(obj); |
||
2332 | Serge | 2066 | |
3031 | serge | 2067 | list_del(&obj->mm_list); |
2068 | list_move_tail(&obj->gtt_list, &dev_priv->mm.unbound_list); |
||
2344 | Serge | 2069 | /* Avoid an unnecessary call to unbind on rebind. */ |
2070 | obj->map_and_fenceable = true; |
||
2332 | Serge | 2071 | |
2344 | Serge | 2072 | drm_mm_put_block(obj->gtt_space); |
2073 | obj->gtt_space = NULL; |
||
2074 | obj->gtt_offset = 0; |
||
2332 | Serge | 2075 | |
2344 | Serge | 2076 | return 0; |
2077 | } |
||
2332 | Serge | 2078 | |
3031 | serge | 2079 | int i915_gpu_idle(struct drm_device *dev) |
2344 | Serge | 2080 | { |
2081 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
3031 | serge | 2082 | struct intel_ring_buffer *ring; |
2344 | Serge | 2083 | int ret, i; |
2332 | Serge | 2084 | |
2344 | Serge | 2085 | /* Flush everything onto the inactive list. */ |
3031 | serge | 2086 | for_each_ring(ring, dev_priv, i) { |
2087 | ret = i915_switch_context(ring, NULL, DEFAULT_CONTEXT_ID); |
||
2344 | Serge | 2088 | if (ret) |
2089 | return ret; |
||
3031 | serge | 2090 | |
3243 | Serge | 2091 | ret = intel_ring_idle(ring); |
3031 | serge | 2092 | if (ret) |
2093 | return ret; |
||
2344 | Serge | 2094 | } |
2332 | Serge | 2095 | |
2344 | Serge | 2096 | return 0; |
2097 | } |
||
2332 | Serge | 2098 | |
3031 | serge | 2099 | static void sandybridge_write_fence_reg(struct drm_device *dev, int reg, |
2100 | struct drm_i915_gem_object *obj) |
||
2101 | { |
||
2102 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
2103 | uint64_t val; |
||
2332 | Serge | 2104 | |
3031 | serge | 2105 | if (obj) { |
2106 | u32 size = obj->gtt_space->size; |
||
2332 | Serge | 2107 | |
3031 | serge | 2108 | val = (uint64_t)((obj->gtt_offset + size - 4096) & |
2109 | 0xfffff000) << 32; |
||
2110 | val |= obj->gtt_offset & 0xfffff000; |
||
2111 | val |= (uint64_t)((obj->stride / 128) - 1) << |
||
2112 | SANDYBRIDGE_FENCE_PITCH_SHIFT; |
||
2332 | Serge | 2113 | |
3031 | serge | 2114 | if (obj->tiling_mode == I915_TILING_Y) |
2115 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; |
||
2116 | val |= I965_FENCE_REG_VALID; |
||
2117 | } else |
||
2118 | val = 0; |
||
2332 | Serge | 2119 | |
3031 | serge | 2120 | I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + reg * 8, val); |
2121 | POSTING_READ(FENCE_REG_SANDYBRIDGE_0 + reg * 8); |
||
2122 | } |
||
2332 | Serge | 2123 | |
3031 | serge | 2124 | static void i965_write_fence_reg(struct drm_device *dev, int reg, |
2125 | struct drm_i915_gem_object *obj) |
||
2126 | { |
||
2127 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
2128 | uint64_t val; |
||
2332 | Serge | 2129 | |
3031 | serge | 2130 | if (obj) { |
2131 | u32 size = obj->gtt_space->size; |
||
2332 | Serge | 2132 | |
3031 | serge | 2133 | val = (uint64_t)((obj->gtt_offset + size - 4096) & |
2134 | 0xfffff000) << 32; |
||
2135 | val |= obj->gtt_offset & 0xfffff000; |
||
2136 | val |= ((obj->stride / 128) - 1) << I965_FENCE_PITCH_SHIFT; |
||
2137 | if (obj->tiling_mode == I915_TILING_Y) |
||
2138 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; |
||
2139 | val |= I965_FENCE_REG_VALID; |
||
2140 | } else |
||
2141 | val = 0; |
||
2332 | Serge | 2142 | |
3031 | serge | 2143 | I915_WRITE64(FENCE_REG_965_0 + reg * 8, val); |
2144 | POSTING_READ(FENCE_REG_965_0 + reg * 8); |
||
2145 | } |
||
2332 | Serge | 2146 | |
3031 | serge | 2147 | static void i915_write_fence_reg(struct drm_device *dev, int reg, |
2148 | struct drm_i915_gem_object *obj) |
||
2149 | { |
||
2150 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
2151 | u32 val; |
||
2332 | Serge | 2152 | |
3031 | serge | 2153 | if (obj) { |
2154 | u32 size = obj->gtt_space->size; |
||
2155 | int pitch_val; |
||
2156 | int tile_width; |
||
2332 | Serge | 2157 | |
3031 | serge | 2158 | WARN((obj->gtt_offset & ~I915_FENCE_START_MASK) || |
2159 | (size & -size) != size || |
||
2160 | (obj->gtt_offset & (size - 1)), |
||
2161 | "object 0x%08x [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n", |
||
2162 | obj->gtt_offset, obj->map_and_fenceable, size); |
||
2332 | Serge | 2163 | |
3031 | serge | 2164 | if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev)) |
2165 | tile_width = 128; |
||
2166 | else |
||
2167 | tile_width = 512; |
||
2332 | Serge | 2168 | |
3031 | serge | 2169 | /* Note: pitch better be a power of two tile widths */ |
2170 | pitch_val = obj->stride / tile_width; |
||
2171 | pitch_val = ffs(pitch_val) - 1; |
||
2332 | Serge | 2172 | |
3031 | serge | 2173 | val = obj->gtt_offset; |
2174 | if (obj->tiling_mode == I915_TILING_Y) |
||
2175 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; |
||
2176 | val |= I915_FENCE_SIZE_BITS(size); |
||
2177 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; |
||
2178 | val |= I830_FENCE_REG_VALID; |
||
2179 | } else |
||
2180 | val = 0; |
||
2332 | Serge | 2181 | |
3031 | serge | 2182 | if (reg < 8) |
2183 | reg = FENCE_REG_830_0 + reg * 4; |
||
2184 | else |
||
2185 | reg = FENCE_REG_945_8 + (reg - 8) * 4; |
||
2332 | Serge | 2186 | |
3031 | serge | 2187 | I915_WRITE(reg, val); |
2188 | POSTING_READ(reg); |
||
2189 | } |
||
2332 | Serge | 2190 | |
3031 | serge | 2191 | static void i830_write_fence_reg(struct drm_device *dev, int reg, |
2192 | struct drm_i915_gem_object *obj) |
||
2193 | { |
||
2194 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
2195 | uint32_t val; |
||
2344 | Serge | 2196 | |
3031 | serge | 2197 | if (obj) { |
2198 | u32 size = obj->gtt_space->size; |
||
2199 | uint32_t pitch_val; |
||
2344 | Serge | 2200 | |
3031 | serge | 2201 | WARN((obj->gtt_offset & ~I830_FENCE_START_MASK) || |
2202 | (size & -size) != size || |
||
2203 | (obj->gtt_offset & (size - 1)), |
||
2204 | "object 0x%08x not 512K or pot-size 0x%08x aligned\n", |
||
2205 | obj->gtt_offset, size); |
||
2344 | Serge | 2206 | |
3031 | serge | 2207 | pitch_val = obj->stride / 128; |
2208 | pitch_val = ffs(pitch_val) - 1; |
||
2344 | Serge | 2209 | |
3031 | serge | 2210 | val = obj->gtt_offset; |
2211 | if (obj->tiling_mode == I915_TILING_Y) |
||
2212 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; |
||
2213 | val |= I830_FENCE_SIZE_BITS(size); |
||
2214 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; |
||
2215 | val |= I830_FENCE_REG_VALID; |
||
2216 | } else |
||
2217 | val = 0; |
||
2218 | |||
2219 | I915_WRITE(FENCE_REG_830_0 + reg * 4, val); |
||
2220 | POSTING_READ(FENCE_REG_830_0 + reg * 4); |
||
2221 | } |
||
2222 | |||
2223 | static void i915_gem_write_fence(struct drm_device *dev, int reg, |
||
2224 | struct drm_i915_gem_object *obj) |
||
2332 | Serge | 2225 | { |
3031 | serge | 2226 | switch (INTEL_INFO(dev)->gen) { |
2227 | case 7: |
||
2228 | case 6: sandybridge_write_fence_reg(dev, reg, obj); break; |
||
2229 | case 5: |
||
2230 | case 4: i965_write_fence_reg(dev, reg, obj); break; |
||
2231 | case 3: i915_write_fence_reg(dev, reg, obj); break; |
||
2232 | case 2: i830_write_fence_reg(dev, reg, obj); break; |
||
2233 | default: break; |
||
2234 | } |
||
2344 | Serge | 2235 | } |
2236 | |||
3031 | serge | 2237 | static inline int fence_number(struct drm_i915_private *dev_priv, |
2238 | struct drm_i915_fence_reg *fence) |
||
2344 | Serge | 2239 | { |
3031 | serge | 2240 | return fence - dev_priv->fence_regs; |
2241 | } |
||
2332 | Serge | 2242 | |
3031 | serge | 2243 | static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, |
2244 | struct drm_i915_fence_reg *fence, |
||
2245 | bool enable) |
||
2246 | { |
||
2247 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
||
2248 | int reg = fence_number(dev_priv, fence); |
||
2332 | Serge | 2249 | |
3031 | serge | 2250 | i915_gem_write_fence(obj->base.dev, reg, enable ? obj : NULL); |
2251 | |||
2252 | if (enable) { |
||
2253 | obj->fence_reg = reg; |
||
2254 | fence->obj = obj; |
||
2255 | list_move_tail(&fence->lru_list, &dev_priv->mm.fence_list); |
||
2256 | } else { |
||
2257 | obj->fence_reg = I915_FENCE_REG_NONE; |
||
2258 | fence->obj = NULL; |
||
2259 | list_del_init(&fence->lru_list); |
||
2344 | Serge | 2260 | } |
3031 | serge | 2261 | } |
2344 | Serge | 2262 | |
3031 | serge | 2263 | static int |
2264 | i915_gem_object_flush_fence(struct drm_i915_gem_object *obj) |
||
2265 | { |
||
2266 | if (obj->last_fenced_seqno) { |
||
2267 | int ret = i915_wait_seqno(obj->ring, obj->last_fenced_seqno); |
||
2352 | Serge | 2268 | if (ret) |
2269 | return ret; |
||
2344 | Serge | 2270 | |
2271 | obj->last_fenced_seqno = 0; |
||
2272 | } |
||
2273 | |||
2274 | /* Ensure that all CPU reads are completed before installing a fence |
||
2275 | * and all writes before removing the fence. |
||
2332 | Serge | 2276 | */ |
2344 | Serge | 2277 | if (obj->base.read_domains & I915_GEM_DOMAIN_GTT) |
2278 | mb(); |
||
2332 | Serge | 2279 | |
3031 | serge | 2280 | obj->fenced_gpu_access = false; |
2332 | Serge | 2281 | return 0; |
2282 | } |
||
2283 | |||
2284 | int |
||
2344 | Serge | 2285 | i915_gem_object_put_fence(struct drm_i915_gem_object *obj) |
2332 | Serge | 2286 | { |
3031 | serge | 2287 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
2332 | Serge | 2288 | int ret; |
2289 | |||
3031 | serge | 2290 | ret = i915_gem_object_flush_fence(obj); |
2332 | Serge | 2291 | if (ret) |
2292 | return ret; |
||
2293 | |||
3031 | serge | 2294 | if (obj->fence_reg == I915_FENCE_REG_NONE) |
2295 | return 0; |
||
2332 | Serge | 2296 | |
3031 | serge | 2297 | i915_gem_object_update_fence(obj, |
2298 | &dev_priv->fence_regs[obj->fence_reg], |
||
2299 | false); |
||
2300 | i915_gem_object_fence_lost(obj); |
||
2344 | Serge | 2301 | |
2332 | Serge | 2302 | return 0; |
2303 | } |
||
2304 | |||
3031 | serge | 2305 | static struct drm_i915_fence_reg * |
2306 | i915_find_fence_reg(struct drm_device *dev) |
||
2307 | { |
||
2308 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
2309 | struct drm_i915_fence_reg *reg, *avail; |
||
2310 | int i; |
||
2332 | Serge | 2311 | |
3031 | serge | 2312 | /* First try to find a free reg */ |
2313 | avail = NULL; |
||
2314 | for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { |
||
2315 | reg = &dev_priv->fence_regs[i]; |
||
2316 | if (!reg->obj) |
||
2317 | return reg; |
||
2332 | Serge | 2318 | |
3031 | serge | 2319 | if (!reg->pin_count) |
2320 | avail = reg; |
||
2321 | } |
||
2332 | Serge | 2322 | |
3031 | serge | 2323 | if (avail == NULL) |
2324 | return NULL; |
||
2332 | Serge | 2325 | |
3031 | serge | 2326 | /* None available, try to steal one or wait for a user to finish */ |
2327 | list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) { |
||
2328 | if (reg->pin_count) |
||
2329 | continue; |
||
2332 | Serge | 2330 | |
3031 | serge | 2331 | return reg; |
2332 | } |
||
2332 | Serge | 2333 | |
3031 | serge | 2334 | return NULL; |
2335 | } |
||
2332 | Serge | 2336 | |
3031 | serge | 2337 | /** |
2338 | * i915_gem_object_get_fence - set up fencing for an object |
||
2339 | * @obj: object to map through a fence reg |
||
2340 | * |
||
2341 | * When mapping objects through the GTT, userspace wants to be able to write |
||
2342 | * to them without having to worry about swizzling if the object is tiled. |
||
2343 | * This function walks the fence regs looking for a free one for @obj, |
||
2344 | * stealing one if it can't find any. |
||
2345 | * |
||
2346 | * It then sets up the reg based on the object's properties: address, pitch |
||
2347 | * and tiling format. |
||
2348 | * |
||
2349 | * For an untiled surface, this removes any existing fence. |
||
2350 | */ |
||
2351 | int |
||
2352 | i915_gem_object_get_fence(struct drm_i915_gem_object *obj) |
||
2353 | { |
||
2354 | struct drm_device *dev = obj->base.dev; |
||
2355 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
2356 | bool enable = obj->tiling_mode != I915_TILING_NONE; |
||
2357 | struct drm_i915_fence_reg *reg; |
||
2358 | int ret; |
||
2332 | Serge | 2359 | |
3031 | serge | 2360 | /* Have we updated the tiling parameters upon the object and so |
2361 | * will need to serialise the write to the associated fence register? |
||
2362 | */ |
||
2363 | if (obj->fence_dirty) { |
||
2364 | ret = i915_gem_object_flush_fence(obj); |
||
2365 | if (ret) |
||
2366 | return ret; |
||
2367 | } |
||
2332 | Serge | 2368 | |
3031 | serge | 2369 | /* Just update our place in the LRU if our fence is getting reused. */ |
2370 | if (obj->fence_reg != I915_FENCE_REG_NONE) { |
||
2371 | reg = &dev_priv->fence_regs[obj->fence_reg]; |
||
2372 | if (!obj->fence_dirty) { |
||
2373 | list_move_tail(®->lru_list, |
||
2374 | &dev_priv->mm.fence_list); |
||
2375 | return 0; |
||
2376 | } |
||
2377 | } else if (enable) { |
||
2378 | reg = i915_find_fence_reg(dev); |
||
2379 | if (reg == NULL) |
||
2380 | return -EDEADLK; |
||
2332 | Serge | 2381 | |
3031 | serge | 2382 | if (reg->obj) { |
2383 | struct drm_i915_gem_object *old = reg->obj; |
||
2332 | Serge | 2384 | |
3031 | serge | 2385 | ret = i915_gem_object_flush_fence(old); |
2386 | if (ret) |
||
2387 | return ret; |
||
2332 | Serge | 2388 | |
3031 | serge | 2389 | i915_gem_object_fence_lost(old); |
2390 | } |
||
2391 | } else |
||
2392 | return 0; |
||
2332 | Serge | 2393 | |
3031 | serge | 2394 | i915_gem_object_update_fence(obj, reg, enable); |
2395 | obj->fence_dirty = false; |
||
2332 | Serge | 2396 | |
3031 | serge | 2397 | return 0; |
2398 | } |
||
2332 | Serge | 2399 | |
3031 | serge | 2400 | static bool i915_gem_valid_gtt_space(struct drm_device *dev, |
2401 | struct drm_mm_node *gtt_space, |
||
2402 | unsigned long cache_level) |
||
2403 | { |
||
2404 | struct drm_mm_node *other; |
||
2332 | Serge | 2405 | |
3031 | serge | 2406 | /* On non-LLC machines we have to be careful when putting differing |
2407 | * types of snoopable memory together to avoid the prefetcher |
||
2408 | * crossing memory domains and dieing. |
||
2409 | */ |
||
2410 | if (HAS_LLC(dev)) |
||
2411 | return true; |
||
2332 | Serge | 2412 | |
3031 | serge | 2413 | if (gtt_space == NULL) |
2414 | return true; |
||
2332 | Serge | 2415 | |
3031 | serge | 2416 | if (list_empty(>t_space->node_list)) |
2417 | return true; |
||
2332 | Serge | 2418 | |
3031 | serge | 2419 | other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list); |
2420 | if (other->allocated && !other->hole_follows && other->color != cache_level) |
||
2421 | return false; |
||
2344 | Serge | 2422 | |
3031 | serge | 2423 | other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list); |
2424 | if (other->allocated && !gtt_space->hole_follows && other->color != cache_level) |
||
2425 | return false; |
||
2344 | Serge | 2426 | |
3031 | serge | 2427 | return true; |
2428 | } |
||
2344 | Serge | 2429 | |
3031 | serge | 2430 | static void i915_gem_verify_gtt(struct drm_device *dev) |
2431 | { |
||
2432 | #if WATCH_GTT |
||
2433 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
2434 | struct drm_i915_gem_object *obj; |
||
2435 | int err = 0; |
||
2344 | Serge | 2436 | |
3031 | serge | 2437 | list_for_each_entry(obj, &dev_priv->mm.gtt_list, gtt_list) { |
2438 | if (obj->gtt_space == NULL) { |
||
2439 | printk(KERN_ERR "object found on GTT list with no space reserved\n"); |
||
2440 | err++; |
||
2441 | continue; |
||
2442 | } |
||
2344 | Serge | 2443 | |
3031 | serge | 2444 | if (obj->cache_level != obj->gtt_space->color) { |
2445 | printk(KERN_ERR "object reserved space [%08lx, %08lx] with wrong color, cache_level=%x, color=%lx\n", |
||
2446 | obj->gtt_space->start, |
||
2447 | obj->gtt_space->start + obj->gtt_space->size, |
||
2448 | obj->cache_level, |
||
2449 | obj->gtt_space->color); |
||
2450 | err++; |
||
2451 | continue; |
||
2452 | } |
||
2344 | Serge | 2453 | |
3031 | serge | 2454 | if (!i915_gem_valid_gtt_space(dev, |
2455 | obj->gtt_space, |
||
2456 | obj->cache_level)) { |
||
2457 | printk(KERN_ERR "invalid GTT space found at [%08lx, %08lx] - color=%x\n", |
||
2458 | obj->gtt_space->start, |
||
2459 | obj->gtt_space->start + obj->gtt_space->size, |
||
2460 | obj->cache_level); |
||
2461 | err++; |
||
2462 | continue; |
||
2463 | } |
||
2464 | } |
||
2344 | Serge | 2465 | |
3031 | serge | 2466 | WARN_ON(err); |
2467 | #endif |
||
2326 | Serge | 2468 | } |
2469 | |||
2332 | Serge | 2470 | /** |
2471 | * Finds free space in the GTT aperture and binds the object there. |
||
2472 | */ |
||
2473 | static int |
||
2474 | i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, |
||
2475 | unsigned alignment, |
||
3031 | serge | 2476 | bool map_and_fenceable, |
2477 | bool nonblocking) |
||
2332 | Serge | 2478 | { |
2479 | struct drm_device *dev = obj->base.dev; |
||
2480 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
3243 | Serge | 2481 | struct drm_mm_node *node; |
2332 | Serge | 2482 | u32 size, fence_size, fence_alignment, unfenced_alignment; |
2483 | bool mappable, fenceable; |
||
2484 | int ret; |
||
2326 | Serge | 2485 | |
2332 | Serge | 2486 | if (obj->madv != I915_MADV_WILLNEED) { |
3243 | Serge | 2487 | DRM_ERROR("Attempting to bind a purgeable object\n"); |
2332 | Serge | 2488 | return -EINVAL; |
2489 | } |
||
2490 | |||
2491 | fence_size = i915_gem_get_gtt_size(dev, |
||
2492 | obj->base.size, |
||
2493 | obj->tiling_mode); |
||
2494 | fence_alignment = i915_gem_get_gtt_alignment(dev, |
||
2495 | obj->base.size, |
||
2496 | obj->tiling_mode); |
||
2497 | unfenced_alignment = |
||
2498 | i915_gem_get_unfenced_gtt_alignment(dev, |
||
2499 | obj->base.size, |
||
2500 | obj->tiling_mode); |
||
2501 | |||
2502 | if (alignment == 0) |
||
2503 | alignment = map_and_fenceable ? fence_alignment : |
||
2504 | unfenced_alignment; |
||
2505 | if (map_and_fenceable && alignment & (fence_alignment - 1)) { |
||
2506 | DRM_ERROR("Invalid object alignment requested %u\n", alignment); |
||
2507 | return -EINVAL; |
||
2508 | } |
||
2509 | |||
2510 | size = map_and_fenceable ? fence_size : obj->base.size; |
||
2511 | |||
2512 | /* If the object is bigger than the entire aperture, reject it early |
||
2513 | * before evicting everything in a vain attempt to find space. |
||
2514 | */ |
||
2515 | if (obj->base.size > |
||
2516 | (map_and_fenceable ? dev_priv->mm.gtt_mappable_end : dev_priv->mm.gtt_total)) { |
||
2517 | DRM_ERROR("Attempting to bind an object larger than the aperture\n"); |
||
2518 | return -E2BIG; |
||
2519 | } |
||
2520 | |||
3031 | serge | 2521 | ret = i915_gem_object_get_pages(obj); |
2522 | if (ret) |
||
2523 | return ret; |
||
2524 | |||
3243 | Serge | 2525 | i915_gem_object_pin_pages(obj); |
2526 | |||
2527 | node = kzalloc(sizeof(*node), GFP_KERNEL); |
||
2528 | if (node == NULL) { |
||
2529 | i915_gem_object_unpin_pages(obj); |
||
2530 | return -ENOMEM; |
||
2531 | } |
||
2532 | |||
2332 | Serge | 2533 | search_free: |
2534 | if (map_and_fenceable) |
||
3243 | Serge | 2535 | ret = drm_mm_insert_node_in_range_generic(&dev_priv->mm.gtt_space, node, |
3031 | serge | 2536 | size, alignment, obj->cache_level, |
3243 | Serge | 2537 | 0, dev_priv->mm.gtt_mappable_end); |
2332 | Serge | 2538 | else |
3243 | Serge | 2539 | ret = drm_mm_insert_node_generic(&dev_priv->mm.gtt_space, node, |
2540 | size, alignment, obj->cache_level); |
||
2541 | if (ret) { |
||
2332 | Serge | 2542 | |
3243 | Serge | 2543 | i915_gem_object_unpin_pages(obj); |
2544 | kfree(node); |
||
2332 | Serge | 2545 | return ret; |
2546 | } |
||
3243 | Serge | 2547 | if (WARN_ON(!i915_gem_valid_gtt_space(dev, node, obj->cache_level))) { |
2548 | i915_gem_object_unpin_pages(obj); |
||
2549 | drm_mm_put_block(node); |
||
3031 | serge | 2550 | return -EINVAL; |
2551 | } |
||
2332 | Serge | 2552 | |
3031 | serge | 2553 | ret = i915_gem_gtt_prepare_object(obj); |
2332 | Serge | 2554 | if (ret) { |
3243 | Serge | 2555 | i915_gem_object_unpin_pages(obj); |
2556 | drm_mm_put_block(node); |
||
2332 | Serge | 2557 | return ret; |
2558 | } |
||
2559 | |||
3031 | serge | 2560 | list_move_tail(&obj->gtt_list, &dev_priv->mm.bound_list); |
2332 | Serge | 2561 | list_add_tail(&obj->mm_list, &dev_priv->mm.inactive_list); |
2562 | |||
3243 | Serge | 2563 | obj->gtt_space = node; |
2564 | obj->gtt_offset = node->start; |
||
2332 | Serge | 2565 | |
2566 | fenceable = |
||
3243 | Serge | 2567 | node->size == fence_size && |
2568 | (node->start & (fence_alignment - 1)) == 0; |
||
2332 | Serge | 2569 | |
2570 | mappable = |
||
2571 | obj->gtt_offset + obj->base.size <= dev_priv->mm.gtt_mappable_end; |
||
2572 | |||
2573 | obj->map_and_fenceable = mappable && fenceable; |
||
2574 | |||
3243 | Serge | 2575 | i915_gem_object_unpin_pages(obj); |
2351 | Serge | 2576 | trace_i915_gem_object_bind(obj, map_and_fenceable); |
3031 | serge | 2577 | i915_gem_verify_gtt(dev); |
2332 | Serge | 2578 | return 0; |
2579 | } |
||
2580 | |||
2581 | void |
||
2582 | i915_gem_clflush_object(struct drm_i915_gem_object *obj) |
||
2583 | { |
||
2584 | /* If we don't have a page list set up, then we're not pinned |
||
2585 | * to GPU, and we can ignore the cache flush because it'll happen |
||
2586 | * again at bind time. |
||
2587 | */ |
||
3243 | Serge | 2588 | if (obj->pages == NULL) |
2332 | Serge | 2589 | return; |
2590 | |||
2591 | /* If the GPU is snooping the contents of the CPU cache, |
||
2592 | * we do not need to manually clear the CPU cache lines. However, |
||
2593 | * the caches are only snooped when the render cache is |
||
2594 | * flushed/invalidated. As we always have to emit invalidations |
||
2595 | * and flushes when moving into and out of the RENDER domain, correct |
||
2596 | * snooping behaviour occurs naturally as the result of our domain |
||
2597 | * tracking. |
||
2598 | */ |
||
2599 | if (obj->cache_level != I915_CACHE_NONE) |
||
2600 | return; |
||
3243 | Serge | 2601 | #if 0 |
2344 | Serge | 2602 | if(obj->mapped != NULL) |
2603 | { |
||
2604 | uint8_t *page_virtual; |
||
2605 | unsigned int i; |
||
2332 | Serge | 2606 | |
2344 | Serge | 2607 | page_virtual = obj->mapped; |
2608 | asm volatile("mfence"); |
||
2609 | for (i = 0; i < obj->base.size; i += x86_clflush_size) |
||
2610 | clflush(page_virtual + i); |
||
2611 | asm volatile("mfence"); |
||
2612 | } |
||
2613 | else |
||
2614 | { |
||
2615 | uint8_t *page_virtual; |
||
2616 | unsigned int i; |
||
2617 | page_virtual = AllocKernelSpace(obj->base.size); |
||
2618 | if(page_virtual != NULL) |
||
2619 | { |
||
3031 | serge | 2620 | dma_addr_t *src, *dst; |
2344 | Serge | 2621 | u32 count; |
2622 | |||
2623 | #define page_tabs 0xFDC00000 /* really dirty hack */ |
||
2624 | |||
3031 | serge | 2625 | src = obj->pages.page; |
2626 | dst = &((dma_addr_t*)page_tabs)[(u32_t)page_virtual >> 12]; |
||
2344 | Serge | 2627 | count = obj->base.size/4096; |
2628 | |||
2629 | while(count--) |
||
2630 | { |
||
2631 | *dst++ = (0xFFFFF000 & *src++) | 0x001 ; |
||
2632 | }; |
||
2633 | |||
2634 | asm volatile("mfence"); |
||
2635 | for (i = 0; i < obj->base.size; i += x86_clflush_size) |
||
2636 | clflush(page_virtual + i); |
||
2637 | asm volatile("mfence"); |
||
2638 | FreeKernelSpace(page_virtual); |
||
2639 | } |
||
2640 | else |
||
2641 | { |
||
2642 | asm volatile ( |
||
2643 | "mfence \n" |
||
2644 | "wbinvd \n" /* this is really ugly */ |
||
2645 | "mfence"); |
||
2646 | } |
||
2647 | } |
||
3243 | Serge | 2648 | #endif |
2649 | |||
2332 | Serge | 2650 | } |
2651 | |||
2344 | Serge | 2652 | /** Flushes the GTT write domain for the object if it's dirty. */ |
2653 | static void |
||
2654 | i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj) |
||
2655 | { |
||
2656 | uint32_t old_write_domain; |
||
2332 | Serge | 2657 | |
2344 | Serge | 2658 | if (obj->base.write_domain != I915_GEM_DOMAIN_GTT) |
2659 | return; |
||
2332 | Serge | 2660 | |
2344 | Serge | 2661 | /* No actual flushing is required for the GTT write domain. Writes |
2662 | * to it immediately go to main memory as far as we know, so there's |
||
2663 | * no chipset flush. It also doesn't land in render cache. |
||
2664 | * |
||
2665 | * However, we do have to enforce the order so that all writes through |
||
2666 | * the GTT land before any writes to the device, such as updates to |
||
2667 | * the GATT itself. |
||
2668 | */ |
||
2669 | wmb(); |
||
2332 | Serge | 2670 | |
2344 | Serge | 2671 | old_write_domain = obj->base.write_domain; |
2672 | obj->base.write_domain = 0; |
||
2332 | Serge | 2673 | |
2351 | Serge | 2674 | trace_i915_gem_object_change_domain(obj, |
2675 | obj->base.read_domains, |
||
2676 | old_write_domain); |
||
2344 | Serge | 2677 | } |
2332 | Serge | 2678 | |
2679 | /** Flushes the CPU write domain for the object if it's dirty. */ |
||
2326 | Serge | 2680 | static void |
2332 | Serge | 2681 | i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj) |
2682 | { |
||
2683 | uint32_t old_write_domain; |
||
2684 | |||
2685 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) |
||
2686 | return; |
||
2687 | |||
2688 | i915_gem_clflush_object(obj); |
||
3243 | Serge | 2689 | i915_gem_chipset_flush(obj->base.dev); |
2332 | Serge | 2690 | old_write_domain = obj->base.write_domain; |
2691 | obj->base.write_domain = 0; |
||
2692 | |||
2351 | Serge | 2693 | trace_i915_gem_object_change_domain(obj, |
2694 | obj->base.read_domains, |
||
2695 | old_write_domain); |
||
2332 | Serge | 2696 | } |
2697 | |||
2698 | /** |
||
2699 | * Moves a single object to the GTT read, and possibly write domain. |
||
2700 | * |
||
2701 | * This function returns when the move is complete, including waiting on |
||
2702 | * flushes to occur. |
||
2703 | */ |
||
2704 | int |
||
2705 | i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write) |
||
2706 | { |
||
3031 | serge | 2707 | drm_i915_private_t *dev_priv = obj->base.dev->dev_private; |
2332 | Serge | 2708 | uint32_t old_write_domain, old_read_domains; |
2709 | int ret; |
||
2710 | |||
2711 | /* Not valid to be called on unbound objects. */ |
||
2712 | if (obj->gtt_space == NULL) |
||
2713 | return -EINVAL; |
||
2714 | |||
2715 | if (obj->base.write_domain == I915_GEM_DOMAIN_GTT) |
||
2716 | return 0; |
||
2717 | |||
3031 | serge | 2718 | ret = i915_gem_object_wait_rendering(obj, !write); |
2332 | Serge | 2719 | if (ret) |
2720 | return ret; |
||
2721 | |||
2722 | i915_gem_object_flush_cpu_write_domain(obj); |
||
2723 | |||
2724 | old_write_domain = obj->base.write_domain; |
||
2725 | old_read_domains = obj->base.read_domains; |
||
2726 | |||
2727 | /* It should now be out of any other write domains, and we can update |
||
2728 | * the domain values for our changes. |
||
2729 | */ |
||
2730 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0); |
||
2731 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; |
||
2732 | if (write) { |
||
2733 | obj->base.read_domains = I915_GEM_DOMAIN_GTT; |
||
2734 | obj->base.write_domain = I915_GEM_DOMAIN_GTT; |
||
2735 | obj->dirty = 1; |
||
2736 | } |
||
2737 | |||
2351 | Serge | 2738 | trace_i915_gem_object_change_domain(obj, |
2739 | old_read_domains, |
||
2740 | old_write_domain); |
||
2741 | |||
3031 | serge | 2742 | /* And bump the LRU for this access */ |
2743 | if (i915_gem_object_is_inactive(obj)) |
||
2744 | list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list); |
||
2745 | |||
2332 | Serge | 2746 | return 0; |
2747 | } |
||
2748 | |||
2335 | Serge | 2749 | int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj, |
2750 | enum i915_cache_level cache_level) |
||
2751 | { |
||
3031 | serge | 2752 | struct drm_device *dev = obj->base.dev; |
2753 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
2335 | Serge | 2754 | int ret; |
2332 | Serge | 2755 | |
2335 | Serge | 2756 | if (obj->cache_level == cache_level) |
2757 | return 0; |
||
2332 | Serge | 2758 | |
2335 | Serge | 2759 | if (obj->pin_count) { |
2760 | DRM_DEBUG("can not change the cache level of pinned objects\n"); |
||
2761 | return -EBUSY; |
||
2762 | } |
||
2332 | Serge | 2763 | |
3031 | serge | 2764 | if (!i915_gem_valid_gtt_space(dev, obj->gtt_space, cache_level)) { |
2765 | ret = i915_gem_object_unbind(obj); |
||
2766 | if (ret) |
||
2767 | return ret; |
||
2768 | } |
||
2769 | |||
2335 | Serge | 2770 | if (obj->gtt_space) { |
2771 | ret = i915_gem_object_finish_gpu(obj); |
||
2772 | if (ret) |
||
2773 | return ret; |
||
2332 | Serge | 2774 | |
2335 | Serge | 2775 | i915_gem_object_finish_gtt(obj); |
2332 | Serge | 2776 | |
2335 | Serge | 2777 | /* Before SandyBridge, you could not use tiling or fence |
2778 | * registers with snooped memory, so relinquish any fences |
||
2779 | * currently pointing to our region in the aperture. |
||
2780 | */ |
||
3031 | serge | 2781 | if (INTEL_INFO(dev)->gen < 6) { |
2335 | Serge | 2782 | ret = i915_gem_object_put_fence(obj); |
2783 | if (ret) |
||
2784 | return ret; |
||
2785 | } |
||
2332 | Serge | 2786 | |
3031 | serge | 2787 | if (obj->has_global_gtt_mapping) |
2788 | i915_gem_gtt_bind_object(obj, cache_level); |
||
2789 | if (obj->has_aliasing_ppgtt_mapping) |
||
2790 | i915_ppgtt_bind_object(dev_priv->mm.aliasing_ppgtt, |
||
2791 | obj, cache_level); |
||
2792 | |||
2793 | obj->gtt_space->color = cache_level; |
||
2335 | Serge | 2794 | } |
2332 | Serge | 2795 | |
2335 | Serge | 2796 | if (cache_level == I915_CACHE_NONE) { |
2797 | u32 old_read_domains, old_write_domain; |
||
2332 | Serge | 2798 | |
2335 | Serge | 2799 | /* If we're coming from LLC cached, then we haven't |
2800 | * actually been tracking whether the data is in the |
||
2801 | * CPU cache or not, since we only allow one bit set |
||
2802 | * in obj->write_domain and have been skipping the clflushes. |
||
2803 | * Just set it to the CPU cache for now. |
||
2804 | */ |
||
2805 | WARN_ON(obj->base.write_domain & ~I915_GEM_DOMAIN_CPU); |
||
2806 | WARN_ON(obj->base.read_domains & ~I915_GEM_DOMAIN_CPU); |
||
2332 | Serge | 2807 | |
2335 | Serge | 2808 | old_read_domains = obj->base.read_domains; |
2809 | old_write_domain = obj->base.write_domain; |
||
2332 | Serge | 2810 | |
2335 | Serge | 2811 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; |
2812 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
||
2332 | Serge | 2813 | |
2351 | Serge | 2814 | trace_i915_gem_object_change_domain(obj, |
2815 | old_read_domains, |
||
2816 | old_write_domain); |
||
2344 | Serge | 2817 | } |
2332 | Serge | 2818 | |
2335 | Serge | 2819 | obj->cache_level = cache_level; |
3031 | serge | 2820 | i915_gem_verify_gtt(dev); |
2335 | Serge | 2821 | return 0; |
2822 | } |
||
2332 | Serge | 2823 | |
2335 | Serge | 2824 | /* |
2825 | * Prepare buffer for display plane (scanout, cursors, etc). |
||
2826 | * Can be called from an uninterruptible phase (modesetting) and allows |
||
2827 | * any flushes to be pipelined (for pageflips). |
||
2828 | */ |
||
2829 | int |
||
2830 | i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, |
||
2831 | u32 alignment, |
||
2832 | struct intel_ring_buffer *pipelined) |
||
2833 | { |
||
2834 | u32 old_read_domains, old_write_domain; |
||
2835 | int ret; |
||
2332 | Serge | 2836 | |
3031 | serge | 2837 | if (pipelined != obj->ring) { |
2838 | ret = i915_gem_object_sync(obj, pipelined); |
||
2335 | Serge | 2839 | if (ret) |
2840 | return ret; |
||
2841 | } |
||
2332 | Serge | 2842 | |
2335 | Serge | 2843 | /* The display engine is not coherent with the LLC cache on gen6. As |
2844 | * a result, we make sure that the pinning that is about to occur is |
||
2845 | * done with uncached PTEs. This is lowest common denominator for all |
||
2846 | * chipsets. |
||
2847 | * |
||
2848 | * However for gen6+, we could do better by using the GFDT bit instead |
||
2849 | * of uncaching, which would allow us to flush all the LLC-cached data |
||
2850 | * with that bit in the PTE to main memory with just one PIPE_CONTROL. |
||
2851 | */ |
||
2360 | Serge | 2852 | ret = i915_gem_object_set_cache_level(obj, I915_CACHE_NONE); |
2853 | if (ret) |
||
2854 | return ret; |
||
2332 | Serge | 2855 | |
2335 | Serge | 2856 | /* As the user may map the buffer once pinned in the display plane |
2857 | * (e.g. libkms for the bootup splash), we have to ensure that we |
||
2858 | * always use map_and_fenceable for all scanout buffers. |
||
2859 | */ |
||
3031 | serge | 2860 | ret = i915_gem_object_pin(obj, alignment, true, false); |
2335 | Serge | 2861 | if (ret) |
2862 | return ret; |
||
2332 | Serge | 2863 | |
2335 | Serge | 2864 | i915_gem_object_flush_cpu_write_domain(obj); |
2332 | Serge | 2865 | |
2335 | Serge | 2866 | old_write_domain = obj->base.write_domain; |
2867 | old_read_domains = obj->base.read_domains; |
||
2332 | Serge | 2868 | |
2335 | Serge | 2869 | /* It should now be out of any other write domains, and we can update |
2870 | * the domain values for our changes. |
||
2871 | */ |
||
3031 | serge | 2872 | obj->base.write_domain = 0; |
2335 | Serge | 2873 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; |
2332 | Serge | 2874 | |
2351 | Serge | 2875 | trace_i915_gem_object_change_domain(obj, |
2876 | old_read_domains, |
||
2877 | old_write_domain); |
||
2332 | Serge | 2878 | |
2335 | Serge | 2879 | return 0; |
2880 | } |
||
2332 | Serge | 2881 | |
2344 | Serge | 2882 | int |
2883 | i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj) |
||
2884 | { |
||
2885 | int ret; |
||
2332 | Serge | 2886 | |
2344 | Serge | 2887 | if ((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0) |
2888 | return 0; |
||
2332 | Serge | 2889 | |
3031 | serge | 2890 | ret = i915_gem_object_wait_rendering(obj, false); |
3243 | Serge | 2891 | if (ret) |
2892 | return ret; |
||
2332 | Serge | 2893 | |
2344 | Serge | 2894 | /* Ensure that we invalidate the GPU's caches and TLBs. */ |
2895 | obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS; |
||
3031 | serge | 2896 | return 0; |
2344 | Serge | 2897 | } |
2332 | Serge | 2898 | |
2344 | Serge | 2899 | /** |
2900 | * Moves a single object to the CPU read, and possibly write domain. |
||
2901 | * |
||
2902 | * This function returns when the move is complete, including waiting on |
||
2903 | * flushes to occur. |
||
2904 | */ |
||
3031 | serge | 2905 | int |
2344 | Serge | 2906 | i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write) |
2907 | { |
||
2908 | uint32_t old_write_domain, old_read_domains; |
||
2909 | int ret; |
||
2332 | Serge | 2910 | |
2344 | Serge | 2911 | if (obj->base.write_domain == I915_GEM_DOMAIN_CPU) |
2912 | return 0; |
||
2332 | Serge | 2913 | |
3031 | serge | 2914 | ret = i915_gem_object_wait_rendering(obj, !write); |
2344 | Serge | 2915 | if (ret) |
2916 | return ret; |
||
2332 | Serge | 2917 | |
2344 | Serge | 2918 | i915_gem_object_flush_gtt_write_domain(obj); |
2332 | Serge | 2919 | |
2344 | Serge | 2920 | old_write_domain = obj->base.write_domain; |
2921 | old_read_domains = obj->base.read_domains; |
||
2332 | Serge | 2922 | |
2344 | Serge | 2923 | /* Flush the CPU cache if it's still invalid. */ |
2924 | if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) { |
||
2925 | i915_gem_clflush_object(obj); |
||
2332 | Serge | 2926 | |
2344 | Serge | 2927 | obj->base.read_domains |= I915_GEM_DOMAIN_CPU; |
2928 | } |
||
2332 | Serge | 2929 | |
2344 | Serge | 2930 | /* It should now be out of any other write domains, and we can update |
2931 | * the domain values for our changes. |
||
2932 | */ |
||
2933 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) != 0); |
||
2332 | Serge | 2934 | |
2344 | Serge | 2935 | /* If we're writing through the CPU, then the GPU read domains will |
2936 | * need to be invalidated at next use. |
||
2937 | */ |
||
2938 | if (write) { |
||
2939 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; |
||
2940 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
||
2941 | } |
||
2332 | Serge | 2942 | |
2351 | Serge | 2943 | trace_i915_gem_object_change_domain(obj, |
2944 | old_read_domains, |
||
2945 | old_write_domain); |
||
2332 | Serge | 2946 | |
2344 | Serge | 2947 | return 0; |
2948 | } |
||
2332 | Serge | 2949 | |
3031 | serge | 2950 | #if 0 |
2951 | /* Throttle our rendering by waiting until the ring has completed our requests |
||
2952 | * emitted over 20 msec ago. |
||
2344 | Serge | 2953 | * |
3031 | serge | 2954 | * Note that if we were to use the current jiffies each time around the loop, |
2955 | * we wouldn't escape the function with any frames outstanding if the time to |
||
2956 | * render a frame was over 20ms. |
||
2957 | * |
||
2958 | * This should get us reasonable parallelism between CPU and GPU but also |
||
2959 | * relatively low latency when blocking on a particular request to finish. |
||
2344 | Serge | 2960 | */ |
3031 | serge | 2961 | static int |
2962 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file) |
||
2344 | Serge | 2963 | { |
3031 | serge | 2964 | struct drm_i915_private *dev_priv = dev->dev_private; |
2965 | struct drm_i915_file_private *file_priv = file->driver_priv; |
||
2966 | unsigned long recent_enough = GetTimerTics() - msecs_to_jiffies(20); |
||
2967 | struct drm_i915_gem_request *request; |
||
2968 | struct intel_ring_buffer *ring = NULL; |
||
2969 | u32 seqno = 0; |
||
2970 | int ret; |
||
2332 | Serge | 2971 | |
3031 | serge | 2972 | if (atomic_read(&dev_priv->mm.wedged)) |
2973 | return -EIO; |
||
2332 | Serge | 2974 | |
3031 | serge | 2975 | spin_lock(&file_priv->mm.lock); |
2976 | list_for_each_entry(request, &file_priv->mm.request_list, client_list) { |
||
2977 | if (time_after_eq(request->emitted_jiffies, recent_enough)) |
||
2978 | break; |
||
2332 | Serge | 2979 | |
3031 | serge | 2980 | ring = request->ring; |
2981 | seqno = request->seqno; |
||
2982 | } |
||
2983 | spin_unlock(&file_priv->mm.lock); |
||
2332 | Serge | 2984 | |
3031 | serge | 2985 | if (seqno == 0) |
2986 | return 0; |
||
2332 | Serge | 2987 | |
3031 | serge | 2988 | ret = __wait_seqno(ring, seqno, true, NULL); |
2989 | if (ret == 0) |
||
2990 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, 0); |
||
2332 | Serge | 2991 | |
3031 | serge | 2992 | return ret; |
2352 | Serge | 2993 | } |
3031 | serge | 2994 | #endif |
2332 | Serge | 2995 | |
2996 | int |
||
2997 | i915_gem_object_pin(struct drm_i915_gem_object *obj, |
||
2998 | uint32_t alignment, |
||
3031 | serge | 2999 | bool map_and_fenceable, |
3000 | bool nonblocking) |
||
2332 | Serge | 3001 | { |
3002 | int ret; |
||
3003 | |||
3031 | serge | 3004 | if (WARN_ON(obj->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT)) |
3005 | return -EBUSY; |
||
2332 | Serge | 3006 | |
3007 | #if 0 |
||
3008 | if (obj->gtt_space != NULL) { |
||
3009 | if ((alignment && obj->gtt_offset & (alignment - 1)) || |
||
3010 | (map_and_fenceable && !obj->map_and_fenceable)) { |
||
3011 | WARN(obj->pin_count, |
||
3012 | "bo is already pinned with incorrect alignment:" |
||
3013 | " offset=%x, req.alignment=%x, req.map_and_fenceable=%d," |
||
3014 | " obj->map_and_fenceable=%d\n", |
||
3015 | obj->gtt_offset, alignment, |
||
3016 | map_and_fenceable, |
||
3017 | obj->map_and_fenceable); |
||
3018 | ret = i915_gem_object_unbind(obj); |
||
3019 | if (ret) |
||
3020 | return ret; |
||
3021 | } |
||
3022 | } |
||
3023 | #endif |
||
3024 | |||
3025 | if (obj->gtt_space == NULL) { |
||
3243 | Serge | 3026 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
3027 | |||
2332 | Serge | 3028 | ret = i915_gem_object_bind_to_gtt(obj, alignment, |
3031 | serge | 3029 | map_and_fenceable, |
3030 | nonblocking); |
||
2332 | Serge | 3031 | if (ret) |
3032 | return ret; |
||
3243 | Serge | 3033 | |
3034 | if (!dev_priv->mm.aliasing_ppgtt) |
||
3035 | i915_gem_gtt_bind_object(obj, obj->cache_level); |
||
2332 | Serge | 3036 | } |
3037 | |||
3031 | serge | 3038 | if (!obj->has_global_gtt_mapping && map_and_fenceable) |
3039 | i915_gem_gtt_bind_object(obj, obj->cache_level); |
||
3040 | |||
3041 | obj->pin_count++; |
||
2332 | Serge | 3042 | obj->pin_mappable |= map_and_fenceable; |
3043 | |||
3044 | return 0; |
||
3045 | } |
||
3046 | |||
2344 | Serge | 3047 | void |
3048 | i915_gem_object_unpin(struct drm_i915_gem_object *obj) |
||
3049 | { |
||
3050 | BUG_ON(obj->pin_count == 0); |
||
3051 | BUG_ON(obj->gtt_space == NULL); |
||
2332 | Serge | 3052 | |
3031 | serge | 3053 | if (--obj->pin_count == 0) |
2344 | Serge | 3054 | obj->pin_mappable = false; |
3055 | } |
||
2332 | Serge | 3056 | |
3031 | serge | 3057 | #if 0 |
3058 | int |
||
3059 | i915_gem_pin_ioctl(struct drm_device *dev, void *data, |
||
3060 | struct drm_file *file) |
||
3061 | { |
||
3062 | struct drm_i915_gem_pin *args = data; |
||
3063 | struct drm_i915_gem_object *obj; |
||
3064 | int ret; |
||
2332 | Serge | 3065 | |
3031 | serge | 3066 | ret = i915_mutex_lock_interruptible(dev); |
3067 | if (ret) |
||
3068 | return ret; |
||
2332 | Serge | 3069 | |
3031 | serge | 3070 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
3071 | if (&obj->base == NULL) { |
||
3072 | ret = -ENOENT; |
||
3073 | goto unlock; |
||
3074 | } |
||
2332 | Serge | 3075 | |
3031 | serge | 3076 | if (obj->madv != I915_MADV_WILLNEED) { |
3077 | DRM_ERROR("Attempting to pin a purgeable buffer\n"); |
||
3078 | ret = -EINVAL; |
||
3079 | goto out; |
||
3080 | } |
||
2332 | Serge | 3081 | |
3031 | serge | 3082 | if (obj->pin_filp != NULL && obj->pin_filp != file) { |
3083 | DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n", |
||
3084 | args->handle); |
||
3085 | ret = -EINVAL; |
||
3086 | goto out; |
||
3087 | } |
||
2332 | Serge | 3088 | |
3243 | Serge | 3089 | if (obj->user_pin_count == 0) { |
3031 | serge | 3090 | ret = i915_gem_object_pin(obj, args->alignment, true, false); |
3091 | if (ret) |
||
3092 | goto out; |
||
3093 | } |
||
2332 | Serge | 3094 | |
3243 | Serge | 3095 | obj->user_pin_count++; |
3096 | obj->pin_filp = file; |
||
3097 | |||
3031 | serge | 3098 | /* XXX - flush the CPU caches for pinned objects |
3099 | * as the X server doesn't manage domains yet |
||
3100 | */ |
||
3101 | i915_gem_object_flush_cpu_write_domain(obj); |
||
3102 | args->offset = obj->gtt_offset; |
||
3103 | out: |
||
3104 | drm_gem_object_unreference(&obj->base); |
||
3105 | unlock: |
||
3106 | mutex_unlock(&dev->struct_mutex); |
||
3107 | return ret; |
||
3108 | } |
||
2332 | Serge | 3109 | |
3031 | serge | 3110 | int |
3111 | i915_gem_unpin_ioctl(struct drm_device *dev, void *data, |
||
3112 | struct drm_file *file) |
||
3113 | { |
||
3114 | struct drm_i915_gem_pin *args = data; |
||
3115 | struct drm_i915_gem_object *obj; |
||
3116 | int ret; |
||
2332 | Serge | 3117 | |
3031 | serge | 3118 | ret = i915_mutex_lock_interruptible(dev); |
3119 | if (ret) |
||
3120 | return ret; |
||
2332 | Serge | 3121 | |
3031 | serge | 3122 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
3123 | if (&obj->base == NULL) { |
||
3124 | ret = -ENOENT; |
||
3125 | goto unlock; |
||
3126 | } |
||
2332 | Serge | 3127 | |
3031 | serge | 3128 | if (obj->pin_filp != file) { |
3129 | DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n", |
||
3130 | args->handle); |
||
3131 | ret = -EINVAL; |
||
3132 | goto out; |
||
3133 | } |
||
3134 | obj->user_pin_count--; |
||
3135 | if (obj->user_pin_count == 0) { |
||
3136 | obj->pin_filp = NULL; |
||
3137 | i915_gem_object_unpin(obj); |
||
3138 | } |
||
2332 | Serge | 3139 | |
3031 | serge | 3140 | out: |
3141 | drm_gem_object_unreference(&obj->base); |
||
3142 | unlock: |
||
3143 | mutex_unlock(&dev->struct_mutex); |
||
3144 | return ret; |
||
3145 | } |
||
2332 | Serge | 3146 | |
3031 | serge | 3147 | int |
3148 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, |
||
3149 | struct drm_file *file) |
||
3150 | { |
||
3151 | struct drm_i915_gem_busy *args = data; |
||
3152 | struct drm_i915_gem_object *obj; |
||
3153 | int ret; |
||
2332 | Serge | 3154 | |
3031 | serge | 3155 | ret = i915_mutex_lock_interruptible(dev); |
3156 | if (ret) |
||
3157 | return ret; |
||
2332 | Serge | 3158 | |
3031 | serge | 3159 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
3160 | if (&obj->base == NULL) { |
||
3161 | ret = -ENOENT; |
||
3162 | goto unlock; |
||
3163 | } |
||
2332 | Serge | 3164 | |
3031 | serge | 3165 | /* Count all active objects as busy, even if they are currently not used |
3166 | * by the gpu. Users of this interface expect objects to eventually |
||
3167 | * become non-busy without any further actions, therefore emit any |
||
3168 | * necessary flushes here. |
||
3169 | */ |
||
3170 | ret = i915_gem_object_flush_active(obj); |
||
2332 | Serge | 3171 | |
3031 | serge | 3172 | args->busy = obj->active; |
3173 | if (obj->ring) { |
||
3174 | BUILD_BUG_ON(I915_NUM_RINGS > 16); |
||
3175 | args->busy |= intel_ring_flag(obj->ring) << 16; |
||
3176 | } |
||
2332 | Serge | 3177 | |
3031 | serge | 3178 | drm_gem_object_unreference(&obj->base); |
3179 | unlock: |
||
3180 | mutex_unlock(&dev->struct_mutex); |
||
3181 | return ret; |
||
3182 | } |
||
2332 | Serge | 3183 | |
3031 | serge | 3184 | int |
3185 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, |
||
3186 | struct drm_file *file_priv) |
||
3187 | { |
||
3188 | return i915_gem_ring_throttle(dev, file_priv); |
||
3189 | } |
||
2332 | Serge | 3190 | |
3031 | serge | 3191 | int |
3192 | i915_gem_madvise_ioctl(struct drm_device *dev, void *data, |
||
3193 | struct drm_file *file_priv) |
||
3194 | { |
||
3195 | struct drm_i915_gem_madvise *args = data; |
||
3196 | struct drm_i915_gem_object *obj; |
||
3197 | int ret; |
||
2332 | Serge | 3198 | |
3031 | serge | 3199 | switch (args->madv) { |
3200 | case I915_MADV_DONTNEED: |
||
3201 | case I915_MADV_WILLNEED: |
||
3202 | break; |
||
3203 | default: |
||
3204 | return -EINVAL; |
||
3205 | } |
||
2332 | Serge | 3206 | |
3031 | serge | 3207 | ret = i915_mutex_lock_interruptible(dev); |
3208 | if (ret) |
||
3209 | return ret; |
||
2332 | Serge | 3210 | |
3031 | serge | 3211 | obj = to_intel_bo(drm_gem_object_lookup(dev, file_priv, args->handle)); |
3212 | if (&obj->base == NULL) { |
||
3213 | ret = -ENOENT; |
||
3214 | goto unlock; |
||
3215 | } |
||
2332 | Serge | 3216 | |
3031 | serge | 3217 | if (obj->pin_count) { |
3218 | ret = -EINVAL; |
||
3219 | goto out; |
||
3220 | } |
||
2332 | Serge | 3221 | |
3031 | serge | 3222 | if (obj->madv != __I915_MADV_PURGED) |
3223 | obj->madv = args->madv; |
||
2332 | Serge | 3224 | |
3031 | serge | 3225 | /* if the object is no longer attached, discard its backing storage */ |
3226 | if (i915_gem_object_is_purgeable(obj) && obj->pages == NULL) |
||
3227 | i915_gem_object_truncate(obj); |
||
2332 | Serge | 3228 | |
3031 | serge | 3229 | args->retained = obj->madv != __I915_MADV_PURGED; |
2332 | Serge | 3230 | |
3031 | serge | 3231 | out: |
3232 | drm_gem_object_unreference(&obj->base); |
||
3233 | unlock: |
||
3234 | mutex_unlock(&dev->struct_mutex); |
||
3235 | return ret; |
||
3236 | } |
||
3237 | #endif |
||
2332 | Serge | 3238 | |
3031 | serge | 3239 | void i915_gem_object_init(struct drm_i915_gem_object *obj, |
3240 | const struct drm_i915_gem_object_ops *ops) |
||
3241 | { |
||
3242 | INIT_LIST_HEAD(&obj->mm_list); |
||
3243 | INIT_LIST_HEAD(&obj->gtt_list); |
||
3244 | INIT_LIST_HEAD(&obj->ring_list); |
||
3245 | INIT_LIST_HEAD(&obj->exec_list); |
||
2332 | Serge | 3246 | |
3031 | serge | 3247 | obj->ops = ops; |
3248 | |||
3249 | obj->fence_reg = I915_FENCE_REG_NONE; |
||
3250 | obj->madv = I915_MADV_WILLNEED; |
||
3251 | /* Avoid an unnecessary call to unbind on the first bind. */ |
||
3252 | obj->map_and_fenceable = true; |
||
3253 | |||
3254 | i915_gem_info_add_obj(obj->base.dev->dev_private, obj->base.size); |
||
3255 | } |
||
3256 | |||
3257 | static const struct drm_i915_gem_object_ops i915_gem_object_ops = { |
||
3258 | .get_pages = i915_gem_object_get_pages_gtt, |
||
3259 | .put_pages = i915_gem_object_put_pages_gtt, |
||
3260 | }; |
||
3261 | |||
2332 | Serge | 3262 | struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev, |
3263 | size_t size) |
||
3264 | { |
||
3265 | struct drm_i915_gem_object *obj; |
||
3031 | serge | 3266 | struct address_space *mapping; |
3267 | u32 mask; |
||
2340 | Serge | 3268 | |
2332 | Serge | 3269 | obj = kzalloc(sizeof(*obj), GFP_KERNEL); |
3270 | if (obj == NULL) |
||
3271 | return NULL; |
||
3272 | |||
3273 | if (drm_gem_object_init(dev, &obj->base, size) != 0) { |
||
3274 | kfree(obj); |
||
3275 | return NULL; |
||
3276 | } |
||
3277 | |||
3278 | |||
3031 | serge | 3279 | i915_gem_object_init(obj, &i915_gem_object_ops); |
2332 | Serge | 3280 | |
3281 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
||
3282 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; |
||
3283 | |||
3031 | serge | 3284 | if (HAS_LLC(dev)) { |
3285 | /* On some devices, we can have the GPU use the LLC (the CPU |
||
2332 | Serge | 3286 | * cache) for about a 10% performance improvement |
3287 | * compared to uncached. Graphics requests other than |
||
3288 | * display scanout are coherent with the CPU in |
||
3289 | * accessing this cache. This means in this mode we |
||
3290 | * don't need to clflush on the CPU side, and on the |
||
3291 | * GPU side we only need to flush internal caches to |
||
3292 | * get data visible to the CPU. |
||
3293 | * |
||
3294 | * However, we maintain the display planes as UC, and so |
||
3295 | * need to rebind when first used as such. |
||
3296 | */ |
||
3297 | obj->cache_level = I915_CACHE_LLC; |
||
3298 | } else |
||
3299 | obj->cache_level = I915_CACHE_NONE; |
||
3300 | |||
3301 | return obj; |
||
3302 | } |
||
3303 | |||
2344 | Serge | 3304 | int i915_gem_init_object(struct drm_gem_object *obj) |
3305 | { |
||
3306 | BUG(); |
||
2332 | Serge | 3307 | |
2344 | Serge | 3308 | return 0; |
3309 | } |
||
2332 | Serge | 3310 | |
3031 | serge | 3311 | void i915_gem_free_object(struct drm_gem_object *gem_obj) |
2344 | Serge | 3312 | { |
3031 | serge | 3313 | struct drm_i915_gem_object *obj = to_intel_bo(gem_obj); |
2344 | Serge | 3314 | struct drm_device *dev = obj->base.dev; |
3315 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
2332 | Serge | 3316 | |
3031 | serge | 3317 | trace_i915_gem_object_destroy(obj); |
3318 | |||
3319 | // if (obj->phys_obj) |
||
3320 | // i915_gem_detach_phys_object(dev, obj); |
||
3321 | |||
3322 | obj->pin_count = 0; |
||
3323 | if (WARN_ON(i915_gem_object_unbind(obj) == -ERESTARTSYS)) { |
||
3324 | bool was_interruptible; |
||
3325 | |||
3326 | was_interruptible = dev_priv->mm.interruptible; |
||
3327 | dev_priv->mm.interruptible = false; |
||
3328 | |||
3329 | WARN_ON(i915_gem_object_unbind(obj)); |
||
3330 | |||
3331 | dev_priv->mm.interruptible = was_interruptible; |
||
2344 | Serge | 3332 | } |
2332 | Serge | 3333 | |
3031 | serge | 3334 | obj->pages_pin_count = 0; |
3335 | i915_gem_object_put_pages(obj); |
||
3336 | // i915_gem_object_free_mmap_offset(obj); |
||
2332 | Serge | 3337 | |
3243 | Serge | 3338 | BUG_ON(obj->pages); |
2332 | Serge | 3339 | |
3031 | serge | 3340 | // if (obj->base.import_attach) |
3341 | // drm_prime_gem_destroy(&obj->base, NULL); |
||
3342 | |||
2344 | Serge | 3343 | drm_gem_object_release(&obj->base); |
3344 | i915_gem_info_remove_obj(dev_priv, obj->base.size); |
||
2332 | Serge | 3345 | |
2344 | Serge | 3346 | kfree(obj->bit_17); |
3347 | kfree(obj); |
||
3348 | } |
||
2332 | Serge | 3349 | |
3031 | serge | 3350 | #if 0 |
3351 | int |
||
3352 | i915_gem_idle(struct drm_device *dev) |
||
2344 | Serge | 3353 | { |
3031 | serge | 3354 | drm_i915_private_t *dev_priv = dev->dev_private; |
3355 | int ret; |
||
2332 | Serge | 3356 | |
3031 | serge | 3357 | mutex_lock(&dev->struct_mutex); |
2332 | Serge | 3358 | |
3031 | serge | 3359 | if (dev_priv->mm.suspended) { |
3360 | mutex_unlock(&dev->struct_mutex); |
||
3361 | return 0; |
||
3362 | } |
||
2332 | Serge | 3363 | |
3031 | serge | 3364 | ret = i915_gpu_idle(dev); |
3365 | if (ret) { |
||
3366 | mutex_unlock(&dev->struct_mutex); |
||
3367 | return ret; |
||
3368 | } |
||
3369 | i915_gem_retire_requests(dev); |
||
3370 | |||
3371 | i915_gem_reset_fences(dev); |
||
3372 | |||
3373 | /* Hack! Don't let anybody do execbuf while we don't control the chip. |
||
3374 | * We need to replace this with a semaphore, or something. |
||
3375 | * And not confound mm.suspended! |
||
3376 | */ |
||
3377 | dev_priv->mm.suspended = 1; |
||
3378 | del_timer_sync(&dev_priv->hangcheck_timer); |
||
3379 | |||
3380 | i915_kernel_lost_context(dev); |
||
3381 | i915_gem_cleanup_ringbuffer(dev); |
||
3382 | |||
3383 | mutex_unlock(&dev->struct_mutex); |
||
3384 | |||
3385 | /* Cancel the retire work handler, which should be idle now. */ |
||
3386 | // cancel_delayed_work_sync(&dev_priv->mm.retire_work); |
||
3387 | |||
3388 | return 0; |
||
2344 | Serge | 3389 | } |
3031 | serge | 3390 | #endif |
2332 | Serge | 3391 | |
3031 | serge | 3392 | void i915_gem_l3_remap(struct drm_device *dev) |
3393 | { |
||
3394 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
3395 | u32 misccpctl; |
||
3396 | int i; |
||
2332 | Serge | 3397 | |
3031 | serge | 3398 | if (!IS_IVYBRIDGE(dev)) |
3399 | return; |
||
2332 | Serge | 3400 | |
3243 | Serge | 3401 | if (!dev_priv->l3_parity.remap_info) |
3031 | serge | 3402 | return; |
2332 | Serge | 3403 | |
3031 | serge | 3404 | misccpctl = I915_READ(GEN7_MISCCPCTL); |
3405 | I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE); |
||
3406 | POSTING_READ(GEN7_MISCCPCTL); |
||
2332 | Serge | 3407 | |
3031 | serge | 3408 | for (i = 0; i < GEN7_L3LOG_SIZE; i += 4) { |
3409 | u32 remap = I915_READ(GEN7_L3LOG_BASE + i); |
||
3243 | Serge | 3410 | if (remap && remap != dev_priv->l3_parity.remap_info[i/4]) |
3031 | serge | 3411 | DRM_DEBUG("0x%x was already programmed to %x\n", |
3412 | GEN7_L3LOG_BASE + i, remap); |
||
3243 | Serge | 3413 | if (remap && !dev_priv->l3_parity.remap_info[i/4]) |
3031 | serge | 3414 | DRM_DEBUG_DRIVER("Clearing remapped register\n"); |
3243 | Serge | 3415 | I915_WRITE(GEN7_L3LOG_BASE + i, dev_priv->l3_parity.remap_info[i/4]); |
3031 | serge | 3416 | } |
2332 | Serge | 3417 | |
3031 | serge | 3418 | /* Make sure all the writes land before disabling dop clock gating */ |
3419 | POSTING_READ(GEN7_L3LOG_BASE); |
||
2332 | Serge | 3420 | |
3031 | serge | 3421 | I915_WRITE(GEN7_MISCCPCTL, misccpctl); |
3422 | } |
||
2332 | Serge | 3423 | |
3031 | serge | 3424 | void i915_gem_init_swizzling(struct drm_device *dev) |
3425 | { |
||
3426 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
2332 | Serge | 3427 | |
3031 | serge | 3428 | if (INTEL_INFO(dev)->gen < 5 || |
3429 | dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE) |
||
3430 | return; |
||
2332 | Serge | 3431 | |
3031 | serge | 3432 | I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) | |
3433 | DISP_TILE_SURFACE_SWIZZLING); |
||
2332 | Serge | 3434 | |
3031 | serge | 3435 | if (IS_GEN5(dev)) |
3436 | return; |
||
2344 | Serge | 3437 | |
3031 | serge | 3438 | I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL); |
3439 | if (IS_GEN6(dev)) |
||
3440 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB)); |
||
3441 | else |
||
3442 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB)); |
||
3443 | } |
||
3444 | |||
3445 | static bool |
||
3446 | intel_enable_blt(struct drm_device *dev) |
||
3447 | { |
||
3448 | if (!HAS_BLT(dev)) |
||
3449 | return false; |
||
3450 | |||
3451 | /* The blitter was dysfunctional on early prototypes */ |
||
3452 | if (IS_GEN6(dev) && dev->pdev->revision < 8) { |
||
3453 | DRM_INFO("BLT not supported on this pre-production hardware;" |
||
3454 | " graphics performance will be degraded.\n"); |
||
3455 | return false; |
||
3456 | } |
||
3457 | |||
3458 | return true; |
||
3459 | } |
||
3460 | |||
2332 | Serge | 3461 | int |
3031 | serge | 3462 | i915_gem_init_hw(struct drm_device *dev) |
2332 | Serge | 3463 | { |
3464 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
3465 | int ret; |
||
2351 | Serge | 3466 | |
3243 | Serge | 3467 | if (INTEL_INFO(dev)->gen < 6 && !intel_enable_gtt()) |
3031 | serge | 3468 | return -EIO; |
3469 | |||
3470 | if (IS_HASWELL(dev) && (I915_READ(0x120010) == 1)) |
||
3471 | I915_WRITE(0x9008, I915_READ(0x9008) | 0xf0000); |
||
3472 | |||
3473 | i915_gem_l3_remap(dev); |
||
3474 | |||
3475 | i915_gem_init_swizzling(dev); |
||
3476 | |||
2332 | Serge | 3477 | ret = intel_init_render_ring_buffer(dev); |
3478 | if (ret) |
||
3479 | return ret; |
||
3480 | |||
3481 | if (HAS_BSD(dev)) { |
||
3482 | ret = intel_init_bsd_ring_buffer(dev); |
||
3483 | if (ret) |
||
3484 | goto cleanup_render_ring; |
||
3485 | } |
||
3486 | |||
3031 | serge | 3487 | if (intel_enable_blt(dev)) { |
2332 | Serge | 3488 | ret = intel_init_blt_ring_buffer(dev); |
3489 | if (ret) |
||
3490 | goto cleanup_bsd_ring; |
||
3491 | } |
||
3492 | |||
3493 | dev_priv->next_seqno = 1; |
||
2351 | Serge | 3494 | |
3031 | serge | 3495 | /* |
3496 | * XXX: There was some w/a described somewhere suggesting loading |
||
3497 | * contexts before PPGTT. |
||
3498 | */ |
||
3499 | i915_gem_context_init(dev); |
||
3500 | i915_gem_init_ppgtt(dev); |
||
3501 | |||
2332 | Serge | 3502 | return 0; |
3503 | |||
3504 | cleanup_bsd_ring: |
||
3505 | intel_cleanup_ring_buffer(&dev_priv->ring[VCS]); |
||
3506 | cleanup_render_ring: |
||
3507 | intel_cleanup_ring_buffer(&dev_priv->ring[RCS]); |
||
3508 | return ret; |
||
3509 | } |
||
3510 | |||
3031 | serge | 3511 | static bool |
3512 | intel_enable_ppgtt(struct drm_device *dev) |
||
3513 | { |
||
3514 | if (i915_enable_ppgtt >= 0) |
||
3515 | return i915_enable_ppgtt; |
||
3516 | |||
3517 | #ifdef CONFIG_INTEL_IOMMU |
||
3518 | /* Disable ppgtt on SNB if VT-d is on. */ |
||
3519 | if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped) |
||
3520 | return false; |
||
3521 | #endif |
||
3522 | |||
3523 | return true; |
||
3524 | } |
||
3525 | |||
3526 | #define LFB_SIZE 0xC00000 |
||
3527 | |||
3528 | int i915_gem_init(struct drm_device *dev) |
||
3529 | { |
||
3530 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
3531 | unsigned long gtt_size, mappable_size; |
||
3532 | int ret; |
||
3533 | |||
3534 | gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT; |
||
3535 | mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT; |
||
3536 | |||
3537 | mutex_lock(&dev->struct_mutex); |
||
3538 | if (intel_enable_ppgtt(dev) && HAS_ALIASING_PPGTT(dev)) { |
||
3539 | /* PPGTT pdes are stolen from global gtt ptes, so shrink the |
||
3540 | * aperture accordingly when using aliasing ppgtt. */ |
||
3541 | gtt_size -= I915_PPGTT_PD_ENTRIES*PAGE_SIZE; |
||
3542 | |||
3543 | i915_gem_init_global_gtt(dev, LFB_SIZE, mappable_size, gtt_size - LFB_SIZE); |
||
3544 | |||
3545 | ret = i915_gem_init_aliasing_ppgtt(dev); |
||
3546 | if (ret) { |
||
3547 | mutex_unlock(&dev->struct_mutex); |
||
3548 | return ret; |
||
3549 | } |
||
3550 | } else { |
||
3551 | /* Let GEM Manage all of the aperture. |
||
3552 | * |
||
3553 | * However, leave one page at the end still bound to the scratch |
||
3554 | * page. There are a number of places where the hardware |
||
3555 | * apparently prefetches past the end of the object, and we've |
||
3556 | * seen multiple hangs with the GPU head pointer stuck in a |
||
3557 | * batchbuffer bound at the last page of the aperture. One page |
||
3558 | * should be enough to keep any prefetching inside of the |
||
3559 | * aperture. |
||
3560 | */ |
||
3561 | i915_gem_init_global_gtt(dev, LFB_SIZE, mappable_size, gtt_size - LFB_SIZE); |
||
3562 | } |
||
3563 | |||
3564 | ret = i915_gem_init_hw(dev); |
||
3565 | mutex_unlock(&dev->struct_mutex); |
||
3566 | if (ret) { |
||
3567 | i915_gem_cleanup_aliasing_ppgtt(dev); |
||
3568 | return ret; |
||
3569 | } |
||
3570 | |||
3571 | return 0; |
||
3572 | } |
||
3573 | |||
2332 | Serge | 3574 | void |
3575 | i915_gem_cleanup_ringbuffer(struct drm_device *dev) |
||
3576 | { |
||
3577 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
3031 | serge | 3578 | struct intel_ring_buffer *ring; |
2332 | Serge | 3579 | int i; |
3580 | |||
3031 | serge | 3581 | for_each_ring(ring, dev_priv, i) |
3582 | intel_cleanup_ring_buffer(ring); |
||
2332 | Serge | 3583 | } |
3584 | |||
3031 | serge | 3585 | #if 0 |
3586 | |||
2332 | Serge | 3587 | int |
3588 | i915_gem_entervt_ioctl(struct drm_device *dev, void *data, |
||
3589 | struct drm_file *file_priv) |
||
3590 | { |
||
3591 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
3031 | serge | 3592 | int ret; |
2332 | Serge | 3593 | |
3594 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
||
3595 | return 0; |
||
3596 | |||
3597 | if (atomic_read(&dev_priv->mm.wedged)) { |
||
3598 | DRM_ERROR("Reenabling wedged hardware, good luck\n"); |
||
3599 | atomic_set(&dev_priv->mm.wedged, 0); |
||
3600 | } |
||
3601 | |||
3602 | mutex_lock(&dev->struct_mutex); |
||
3603 | dev_priv->mm.suspended = 0; |
||
3604 | |||
3031 | serge | 3605 | ret = i915_gem_init_hw(dev); |
2332 | Serge | 3606 | if (ret != 0) { |
3607 | mutex_unlock(&dev->struct_mutex); |
||
3608 | return ret; |
||
3609 | } |
||
3610 | |||
3611 | BUG_ON(!list_empty(&dev_priv->mm.active_list)); |
||
3612 | mutex_unlock(&dev->struct_mutex); |
||
3613 | |||
3614 | ret = drm_irq_install(dev); |
||
3615 | if (ret) |
||
3616 | goto cleanup_ringbuffer; |
||
3617 | |||
3618 | return 0; |
||
3619 | |||
3620 | cleanup_ringbuffer: |
||
3621 | mutex_lock(&dev->struct_mutex); |
||
3622 | i915_gem_cleanup_ringbuffer(dev); |
||
3623 | dev_priv->mm.suspended = 1; |
||
3624 | mutex_unlock(&dev->struct_mutex); |
||
3625 | |||
3626 | return ret; |
||
3627 | } |
||
3628 | |||
3629 | int |
||
3630 | i915_gem_leavevt_ioctl(struct drm_device *dev, void *data, |
||
3631 | struct drm_file *file_priv) |
||
3632 | { |
||
3633 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
||
3634 | return 0; |
||
3635 | |||
3636 | drm_irq_uninstall(dev); |
||
3637 | return i915_gem_idle(dev); |
||
3638 | } |
||
3639 | |||
3640 | void |
||
3641 | i915_gem_lastclose(struct drm_device *dev) |
||
3642 | { |
||
3643 | int ret; |
||
3644 | |||
3645 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
||
3646 | return; |
||
3647 | |||
3648 | ret = i915_gem_idle(dev); |
||
3649 | if (ret) |
||
3650 | DRM_ERROR("failed to idle hardware: %d\n", ret); |
||
3651 | } |
||
3652 | #endif |
||
3653 | |||
3654 | static void |
||
2326 | Serge | 3655 | init_ring_lists(struct intel_ring_buffer *ring) |
3656 | { |
||
3657 | INIT_LIST_HEAD(&ring->active_list); |
||
3658 | INIT_LIST_HEAD(&ring->request_list); |
||
3659 | } |
||
3660 | |||
3661 | void |
||
3662 | i915_gem_load(struct drm_device *dev) |
||
3663 | { |
||
3664 | int i; |
||
3665 | drm_i915_private_t *dev_priv = dev->dev_private; |
||
3666 | |||
3667 | INIT_LIST_HEAD(&dev_priv->mm.active_list); |
||
3668 | INIT_LIST_HEAD(&dev_priv->mm.inactive_list); |
||
3031 | serge | 3669 | INIT_LIST_HEAD(&dev_priv->mm.unbound_list); |
3670 | INIT_LIST_HEAD(&dev_priv->mm.bound_list); |
||
2326 | Serge | 3671 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
3672 | for (i = 0; i < I915_NUM_RINGS; i++) |
||
3673 | init_ring_lists(&dev_priv->ring[i]); |
||
2342 | Serge | 3674 | for (i = 0; i < I915_MAX_NUM_FENCES; i++) |
2326 | Serge | 3675 | INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list); |
2360 | Serge | 3676 | INIT_DELAYED_WORK(&dev_priv->mm.retire_work, |
3677 | i915_gem_retire_work_handler); |
||
2326 | Serge | 3678 | |
3679 | /* On GEN3 we really need to make sure the ARB C3 LP bit is set */ |
||
3680 | if (IS_GEN3(dev)) { |
||
3031 | serge | 3681 | I915_WRITE(MI_ARB_STATE, |
3682 | _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE)); |
||
2326 | Serge | 3683 | } |
3684 | |||
3685 | dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL; |
||
3686 | |||
3687 | if (INTEL_INFO(dev)->gen >= 4 || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) |
||
3688 | dev_priv->num_fence_regs = 16; |
||
3689 | else |
||
3690 | dev_priv->num_fence_regs = 8; |
||
3691 | |||
3692 | /* Initialize fence registers to zero */ |
||
3031 | serge | 3693 | i915_gem_reset_fences(dev); |
2326 | Serge | 3694 | |
3695 | i915_gem_detect_bit_6_swizzle(dev); |
||
3696 | |||
3697 | dev_priv->mm.interruptible = true; |
||
3698 | |||
3699 | // dev_priv->mm.inactive_shrinker.shrink = i915_gem_inactive_shrink; |
||
3700 | // dev_priv->mm.inactive_shrinker.seeks = DEFAULT_SEEKS; |
||
3701 | // register_shrinker(&dev_priv->mm.inactive_shrinker); |
||
3702 | }>>><>><>>>>>><>>>>=>>><>><>>><>><>><>><>><>><> |
||
3703 | |||
3704 |