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Rev | Author | Line No. | Line |
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2326 | Serge | 1 | /* |
6084 | serge | 2 | * Copyright © 2008-2015 Intel Corporation |
2326 | Serge | 3 | * |
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 |
4280 | Serge | 29 | #include |
3031 | serge | 30 | #include |
2326 | Serge | 31 | #include "i915_drv.h" |
6084 | serge | 32 | #include "i915_vgpu.h" |
2351 | Serge | 33 | #include "i915_trace.h" |
2326 | Serge | 34 | #include "intel_drv.h" |
3260 | Serge | 35 | #include |
2330 | Serge | 36 | #include |
2326 | Serge | 37 | //#include |
3746 | Serge | 38 | #include |
2326 | Serge | 39 | #include |
6084 | serge | 40 | #define RQ_BUG_ON(expr) |
2326 | Serge | 41 | |
2344 | Serge | 42 | extern int x86_clflush_size; |
2332 | Serge | 43 | |
3263 | Serge | 44 | #define PROT_READ 0x1 /* page can be read */ |
45 | #define PROT_WRITE 0x2 /* page can be written */ |
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46 | #define MAP_SHARED 0x01 /* Share changes */ |
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47 | |||
2344 | Serge | 48 | |
5060 | serge | 49 | |
3266 | Serge | 50 | struct drm_i915_gem_object *get_fb_obj(); |
51 | |||
3263 | Serge | 52 | unsigned long vm_mmap(struct file *file, unsigned long addr, |
53 | unsigned long len, unsigned long prot, |
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54 | unsigned long flag, unsigned long offset); |
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55 | |||
2344 | Serge | 56 | |
2332 | Serge | 57 | #define MAX_ERRNO 4095 |
58 | |||
59 | #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO) |
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60 | |||
61 | |||
62 | static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj); |
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6084 | serge | 63 | static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj); |
5060 | serge | 64 | static void |
6084 | serge | 65 | i915_gem_object_retire__write(struct drm_i915_gem_object *obj); |
66 | static void |
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67 | i915_gem_object_retire__read(struct drm_i915_gem_object *obj, int ring); |
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2326 | Serge | 68 | |
4104 | Serge | 69 | static bool cpu_cache_is_coherent(struct drm_device *dev, |
70 | enum i915_cache_level level) |
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71 | { |
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72 | return HAS_LLC(dev) || level != I915_CACHE_NONE; |
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73 | } |
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74 | |||
75 | static bool cpu_write_needs_clflush(struct drm_i915_gem_object *obj) |
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76 | { |
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77 | if (!cpu_cache_is_coherent(obj->base.dev, obj->cache_level)) |
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78 | return true; |
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79 | |||
80 | return obj->pin_display; |
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81 | } |
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82 | |||
2332 | Serge | 83 | /* some bookkeeping */ |
84 | static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv, |
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85 | size_t size) |
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86 | { |
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4104 | Serge | 87 | spin_lock(&dev_priv->mm.object_stat_lock); |
2332 | Serge | 88 | dev_priv->mm.object_count++; |
89 | dev_priv->mm.object_memory += size; |
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4104 | Serge | 90 | spin_unlock(&dev_priv->mm.object_stat_lock); |
2332 | Serge | 91 | } |
92 | |||
93 | static void i915_gem_info_remove_obj(struct drm_i915_private *dev_priv, |
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94 | size_t size) |
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95 | { |
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4104 | Serge | 96 | spin_lock(&dev_priv->mm.object_stat_lock); |
2332 | Serge | 97 | dev_priv->mm.object_count--; |
98 | dev_priv->mm.object_memory -= size; |
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4104 | Serge | 99 | spin_unlock(&dev_priv->mm.object_stat_lock); |
2332 | Serge | 100 | } |
101 | |||
102 | static int |
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3480 | Serge | 103 | i915_gem_wait_for_error(struct i915_gpu_error *error) |
2332 | Serge | 104 | { |
105 | int ret; |
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106 | |||
3480 | Serge | 107 | #define EXIT_COND (!i915_reset_in_progress(error)) |
108 | if (EXIT_COND) |
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2332 | Serge | 109 | return 0; |
3255 | Serge | 110 | #if 0 |
3031 | serge | 111 | /* |
112 | * Only wait 10 seconds for the gpu reset to complete to avoid hanging |
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113 | * userspace. If it takes that long something really bad is going on and |
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114 | * we should simply try to bail out and fail as gracefully as possible. |
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115 | */ |
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3480 | Serge | 116 | ret = wait_event_interruptible_timeout(error->reset_queue, |
117 | EXIT_COND, |
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118 | 10*HZ); |
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3031 | serge | 119 | if (ret == 0) { |
120 | DRM_ERROR("Timed out waiting for the gpu reset to complete\n"); |
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121 | return -EIO; |
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122 | } else if (ret < 0) { |
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2332 | Serge | 123 | return ret; |
3031 | serge | 124 | } |
2332 | Serge | 125 | |
3255 | Serge | 126 | #endif |
3480 | Serge | 127 | #undef EXIT_COND |
3255 | Serge | 128 | |
2332 | Serge | 129 | return 0; |
130 | } |
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131 | |||
132 | int i915_mutex_lock_interruptible(struct drm_device *dev) |
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133 | { |
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3480 | Serge | 134 | struct drm_i915_private *dev_priv = dev->dev_private; |
2332 | Serge | 135 | int ret; |
136 | |||
3480 | Serge | 137 | ret = i915_gem_wait_for_error(&dev_priv->gpu_error); |
2332 | Serge | 138 | if (ret) |
139 | return ret; |
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140 | |||
3480 | Serge | 141 | ret = mutex_lock_interruptible(&dev->struct_mutex); |
142 | if (ret) |
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143 | return ret; |
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2332 | Serge | 144 | |
145 | WARN_ON(i915_verify_lists(dev)); |
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146 | return 0; |
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147 | } |
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148 | |||
149 | int |
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150 | i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, |
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151 | struct drm_file *file) |
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152 | { |
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153 | struct drm_i915_private *dev_priv = dev->dev_private; |
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154 | struct drm_i915_gem_get_aperture *args = data; |
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6084 | serge | 155 | struct i915_gtt *ggtt = &dev_priv->gtt; |
156 | struct i915_vma *vma; |
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2332 | Serge | 157 | size_t pinned; |
158 | |||
159 | pinned = 0; |
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160 | mutex_lock(&dev->struct_mutex); |
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6084 | serge | 161 | list_for_each_entry(vma, &ggtt->base.active_list, mm_list) |
162 | if (vma->pin_count) |
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163 | pinned += vma->node.size; |
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164 | list_for_each_entry(vma, &ggtt->base.inactive_list, mm_list) |
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165 | if (vma->pin_count) |
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166 | pinned += vma->node.size; |
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2332 | Serge | 167 | mutex_unlock(&dev->struct_mutex); |
168 | |||
4104 | Serge | 169 | args->aper_size = dev_priv->gtt.base.total; |
2342 | Serge | 170 | args->aper_available_size = args->aper_size - pinned; |
2332 | Serge | 171 | |
172 | return 0; |
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173 | } |
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174 | |||
3480 | Serge | 175 | void *i915_gem_object_alloc(struct drm_device *dev) |
176 | { |
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177 | struct drm_i915_private *dev_priv = dev->dev_private; |
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5367 | serge | 178 | return kzalloc(sizeof(struct drm_i915_gem_object), 0); |
3480 | Serge | 179 | } |
180 | |||
181 | void i915_gem_object_free(struct drm_i915_gem_object *obj) |
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182 | { |
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183 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
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184 | kfree(obj); |
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185 | } |
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186 | |||
3031 | serge | 187 | static int |
188 | i915_gem_create(struct drm_file *file, |
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2332 | Serge | 189 | struct drm_device *dev, |
190 | uint64_t size, |
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191 | uint32_t *handle_p) |
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192 | { |
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193 | struct drm_i915_gem_object *obj; |
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194 | int ret; |
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195 | u32 handle; |
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196 | |||
197 | size = roundup(size, PAGE_SIZE); |
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2342 | Serge | 198 | if (size == 0) |
199 | return -EINVAL; |
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2332 | Serge | 200 | |
201 | /* Allocate the new object */ |
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202 | obj = i915_gem_alloc_object(dev, size); |
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203 | if (obj == NULL) |
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204 | return -ENOMEM; |
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205 | |||
206 | ret = drm_gem_handle_create(file, &obj->base, &handle); |
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4104 | Serge | 207 | /* drop reference from allocate - handle holds it now */ |
208 | drm_gem_object_unreference_unlocked(&obj->base); |
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209 | if (ret) |
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2332 | Serge | 210 | return ret; |
211 | |||
212 | *handle_p = handle; |
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213 | return 0; |
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214 | } |
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215 | |||
216 | int |
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217 | i915_gem_dumb_create(struct drm_file *file, |
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218 | struct drm_device *dev, |
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219 | struct drm_mode_create_dumb *args) |
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220 | { |
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221 | /* have to work out size/pitch and return them */ |
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4560 | Serge | 222 | args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 64); |
2332 | Serge | 223 | args->size = args->pitch * args->height; |
224 | return i915_gem_create(file, dev, |
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225 | args->size, &args->handle); |
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226 | } |
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227 | |||
2326 | Serge | 228 | /** |
2332 | Serge | 229 | * Creates a new mm object and returns a handle to it. |
230 | */ |
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231 | int |
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232 | i915_gem_create_ioctl(struct drm_device *dev, void *data, |
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233 | struct drm_file *file) |
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234 | { |
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235 | struct drm_i915_gem_create *args = data; |
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3031 | serge | 236 | |
2332 | Serge | 237 | return i915_gem_create(file, dev, |
238 | args->size, &args->handle); |
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239 | } |
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240 | |||
241 | |||
3260 | Serge | 242 | #if 0 |
2332 | Serge | 243 | |
3031 | serge | 244 | static inline int |
245 | __copy_to_user_swizzled(char __user *cpu_vaddr, |
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246 | const char *gpu_vaddr, int gpu_offset, |
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6084 | serge | 247 | int length) |
2332 | Serge | 248 | { |
3031 | serge | 249 | int ret, cpu_offset = 0; |
2332 | Serge | 250 | |
3031 | serge | 251 | while (length > 0) { |
252 | int cacheline_end = ALIGN(gpu_offset + 1, 64); |
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253 | int this_length = min(cacheline_end - gpu_offset, length); |
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254 | int swizzled_gpu_offset = gpu_offset ^ 64; |
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2332 | Serge | 255 | |
3031 | serge | 256 | ret = __copy_to_user(cpu_vaddr + cpu_offset, |
257 | gpu_vaddr + swizzled_gpu_offset, |
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258 | this_length); |
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259 | if (ret) |
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260 | return ret + length; |
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2332 | Serge | 261 | |
3031 | serge | 262 | cpu_offset += this_length; |
263 | gpu_offset += this_length; |
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264 | length -= this_length; |
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265 | } |
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266 | |||
267 | return 0; |
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2332 | Serge | 268 | } |
269 | |||
3031 | serge | 270 | static inline int |
271 | __copy_from_user_swizzled(char *gpu_vaddr, int gpu_offset, |
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272 | const char __user *cpu_vaddr, |
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273 | int length) |
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2332 | Serge | 274 | { |
3031 | serge | 275 | int ret, cpu_offset = 0; |
2332 | Serge | 276 | |
277 | while (length > 0) { |
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278 | int cacheline_end = ALIGN(gpu_offset + 1, 64); |
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279 | int this_length = min(cacheline_end - gpu_offset, length); |
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280 | int swizzled_gpu_offset = gpu_offset ^ 64; |
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281 | |||
3031 | serge | 282 | ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset, |
6084 | serge | 283 | cpu_vaddr + cpu_offset, |
284 | this_length); |
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3031 | serge | 285 | if (ret) |
286 | return ret + length; |
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287 | |||
2332 | Serge | 288 | cpu_offset += this_length; |
289 | gpu_offset += this_length; |
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290 | length -= this_length; |
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291 | } |
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292 | |||
3031 | serge | 293 | return 0; |
2332 | Serge | 294 | } |
295 | |||
3031 | serge | 296 | /* Per-page copy function for the shmem pread fastpath. |
297 | * Flushes invalid cachelines before reading the target if |
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298 | * needs_clflush is set. */ |
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2332 | Serge | 299 | static int |
3031 | serge | 300 | shmem_pread_fast(struct page *page, int shmem_page_offset, int page_length, |
301 | char __user *user_data, |
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302 | bool page_do_bit17_swizzling, bool needs_clflush) |
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303 | { |
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6084 | serge | 304 | char *vaddr; |
305 | int ret; |
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3031 | serge | 306 | |
307 | if (unlikely(page_do_bit17_swizzling)) |
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308 | return -EINVAL; |
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309 | |||
6084 | serge | 310 | vaddr = kmap_atomic(page); |
3031 | serge | 311 | if (needs_clflush) |
312 | drm_clflush_virt_range(vaddr + shmem_page_offset, |
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313 | page_length); |
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6084 | serge | 314 | ret = __copy_to_user_inatomic(user_data, |
3031 | serge | 315 | vaddr + shmem_page_offset, |
6084 | serge | 316 | page_length); |
317 | kunmap_atomic(vaddr); |
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3031 | serge | 318 | |
319 | return ret ? -EFAULT : 0; |
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320 | } |
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321 | |||
322 | static void |
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323 | shmem_clflush_swizzled_range(char *addr, unsigned long length, |
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324 | bool swizzled) |
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325 | { |
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326 | if (unlikely(swizzled)) { |
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327 | unsigned long start = (unsigned long) addr; |
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328 | unsigned long end = (unsigned long) addr + length; |
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329 | |||
330 | /* For swizzling simply ensure that we always flush both |
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331 | * channels. Lame, but simple and it works. Swizzled |
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332 | * pwrite/pread is far from a hotpath - current userspace |
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333 | * doesn't use it at all. */ |
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334 | start = round_down(start, 128); |
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335 | end = round_up(end, 128); |
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336 | |||
337 | drm_clflush_virt_range((void *)start, end - start); |
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338 | } else { |
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339 | drm_clflush_virt_range(addr, length); |
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340 | } |
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341 | |||
342 | } |
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343 | |||
344 | /* Only difference to the fast-path function is that this can handle bit17 |
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345 | * and uses non-atomic copy and kmap functions. */ |
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346 | static int |
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347 | shmem_pread_slow(struct page *page, int shmem_page_offset, int page_length, |
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348 | char __user *user_data, |
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349 | bool page_do_bit17_swizzling, bool needs_clflush) |
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350 | { |
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351 | char *vaddr; |
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352 | int ret; |
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353 | |||
354 | vaddr = kmap(page); |
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355 | if (needs_clflush) |
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356 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
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357 | page_length, |
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358 | page_do_bit17_swizzling); |
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359 | |||
360 | if (page_do_bit17_swizzling) |
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361 | ret = __copy_to_user_swizzled(user_data, |
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362 | vaddr, shmem_page_offset, |
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363 | page_length); |
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364 | else |
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365 | ret = __copy_to_user(user_data, |
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366 | vaddr + shmem_page_offset, |
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367 | page_length); |
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368 | kunmap(page); |
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369 | |||
370 | return ret ? - EFAULT : 0; |
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371 | } |
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372 | |||
373 | static int |
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374 | i915_gem_shmem_pread(struct drm_device *dev, |
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6084 | serge | 375 | struct drm_i915_gem_object *obj, |
376 | struct drm_i915_gem_pread *args, |
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377 | struct drm_file *file) |
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2332 | Serge | 378 | { |
3031 | serge | 379 | char __user *user_data; |
2332 | Serge | 380 | ssize_t remain; |
381 | loff_t offset; |
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3031 | serge | 382 | int shmem_page_offset, page_length, ret = 0; |
383 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
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384 | int prefaulted = 0; |
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385 | int needs_clflush = 0; |
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3746 | Serge | 386 | struct sg_page_iter sg_iter; |
2332 | Serge | 387 | |
3746 | Serge | 388 | user_data = to_user_ptr(args->data_ptr); |
2332 | Serge | 389 | remain = args->size; |
390 | |||
3031 | serge | 391 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
392 | |||
5060 | serge | 393 | ret = i915_gem_obj_prepare_shmem_read(obj, &needs_clflush); |
3031 | serge | 394 | if (ret) |
395 | return ret; |
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396 | |||
2332 | Serge | 397 | offset = args->offset; |
398 | |||
3746 | Serge | 399 | for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, |
400 | offset >> PAGE_SHIFT) { |
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401 | struct page *page = sg_page_iter_page(&sg_iter); |
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2332 | Serge | 402 | |
3031 | serge | 403 | if (remain <= 0) |
404 | break; |
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405 | |||
2332 | Serge | 406 | /* Operation in this page |
407 | * |
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3031 | serge | 408 | * shmem_page_offset = offset within page in shmem file |
2332 | Serge | 409 | * page_length = bytes to copy for this page |
410 | */ |
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3031 | serge | 411 | shmem_page_offset = offset_in_page(offset); |
2332 | Serge | 412 | page_length = remain; |
3031 | serge | 413 | if ((shmem_page_offset + page_length) > PAGE_SIZE) |
414 | page_length = PAGE_SIZE - shmem_page_offset; |
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2332 | Serge | 415 | |
3031 | serge | 416 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
417 | (page_to_phys(page) & (1 << 17)) != 0; |
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2332 | Serge | 418 | |
3031 | serge | 419 | ret = shmem_pread_fast(page, shmem_page_offset, page_length, |
420 | user_data, page_do_bit17_swizzling, |
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421 | needs_clflush); |
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422 | if (ret == 0) |
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423 | goto next_page; |
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2332 | Serge | 424 | |
3031 | serge | 425 | mutex_unlock(&dev->struct_mutex); |
426 | |||
5060 | serge | 427 | if (likely(!i915.prefault_disable) && !prefaulted) { |
3031 | serge | 428 | ret = fault_in_multipages_writeable(user_data, remain); |
429 | /* Userspace is tricking us, but we've already clobbered |
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430 | * its pages with the prefault and promised to write the |
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431 | * data up to the first fault. Hence ignore any errors |
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432 | * and just continue. */ |
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433 | (void)ret; |
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434 | prefaulted = 1; |
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435 | } |
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436 | |||
437 | ret = shmem_pread_slow(page, shmem_page_offset, page_length, |
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438 | user_data, page_do_bit17_swizzling, |
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439 | needs_clflush); |
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440 | |||
441 | mutex_lock(&dev->struct_mutex); |
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442 | |||
2332 | Serge | 443 | if (ret) |
3031 | serge | 444 | goto out; |
2332 | Serge | 445 | |
5060 | serge | 446 | next_page: |
2332 | Serge | 447 | remain -= page_length; |
448 | user_data += page_length; |
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449 | offset += page_length; |
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450 | } |
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451 | |||
3031 | serge | 452 | out: |
453 | i915_gem_object_unpin_pages(obj); |
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454 | |||
455 | return ret; |
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2332 | Serge | 456 | } |
457 | |||
458 | /** |
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3031 | serge | 459 | * Reads data from the object referenced by handle. |
460 | * |
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461 | * On error, the contents of *data are undefined. |
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2332 | Serge | 462 | */ |
3031 | serge | 463 | int |
464 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, |
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465 | struct drm_file *file) |
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466 | { |
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467 | struct drm_i915_gem_pread *args = data; |
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468 | struct drm_i915_gem_object *obj; |
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469 | int ret = 0; |
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470 | |||
471 | if (args->size == 0) |
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472 | return 0; |
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473 | |||
474 | if (!access_ok(VERIFY_WRITE, |
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3746 | Serge | 475 | to_user_ptr(args->data_ptr), |
3031 | serge | 476 | args->size)) |
477 | return -EFAULT; |
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478 | |||
479 | ret = i915_mutex_lock_interruptible(dev); |
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480 | if (ret) |
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481 | return ret; |
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482 | |||
483 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
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484 | if (&obj->base == NULL) { |
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485 | ret = -ENOENT; |
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486 | goto unlock; |
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487 | } |
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488 | |||
489 | /* Bounds check source. */ |
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490 | if (args->offset > obj->base.size || |
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491 | args->size > obj->base.size - args->offset) { |
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492 | ret = -EINVAL; |
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493 | goto out; |
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494 | } |
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495 | |||
496 | /* prime objects have no backing filp to GEM pread/pwrite |
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497 | * pages from. |
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498 | */ |
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499 | if (!obj->base.filp) { |
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500 | ret = -EINVAL; |
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501 | goto out; |
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502 | } |
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503 | |||
504 | trace_i915_gem_object_pread(obj, args->offset, args->size); |
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505 | |||
506 | ret = i915_gem_shmem_pread(dev, obj, args, file); |
||
507 | |||
508 | out: |
||
509 | drm_gem_object_unreference(&obj->base); |
||
510 | unlock: |
||
511 | mutex_unlock(&dev->struct_mutex); |
||
512 | return ret; |
||
513 | } |
||
514 | |||
515 | /* This is the fast write path which cannot handle |
||
516 | * page faults in the source data |
||
517 | */ |
||
518 | |||
519 | static inline int |
||
520 | fast_user_write(struct io_mapping *mapping, |
||
521 | loff_t page_base, int page_offset, |
||
522 | char __user *user_data, |
||
523 | int length) |
||
524 | { |
||
525 | void __iomem *vaddr_atomic; |
||
526 | void *vaddr; |
||
527 | unsigned long unwritten; |
||
528 | |||
529 | vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base); |
||
530 | /* We can use the cpu mem copy function because this is X86. */ |
||
531 | vaddr = (void __force*)vaddr_atomic + page_offset; |
||
532 | unwritten = __copy_from_user_inatomic_nocache(vaddr, |
||
533 | user_data, length); |
||
534 | io_mapping_unmap_atomic(vaddr_atomic); |
||
535 | return unwritten; |
||
536 | } |
||
3260 | Serge | 537 | #endif |
3031 | serge | 538 | |
3260 | Serge | 539 | #define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK) |
3031 | serge | 540 | /** |
541 | * This is the fast pwrite path, where we copy the data directly from the |
||
542 | * user into the GTT, uncached. |
||
543 | */ |
||
2332 | Serge | 544 | static int |
3031 | serge | 545 | i915_gem_gtt_pwrite_fast(struct drm_device *dev, |
546 | struct drm_i915_gem_object *obj, |
||
547 | struct drm_i915_gem_pwrite *args, |
||
548 | struct drm_file *file) |
||
2332 | Serge | 549 | { |
5060 | serge | 550 | struct drm_i915_private *dev_priv = dev->dev_private; |
2332 | Serge | 551 | ssize_t remain; |
3031 | serge | 552 | loff_t offset, page_base; |
553 | char __user *user_data; |
||
554 | int page_offset, page_length, ret; |
||
2332 | Serge | 555 | |
5060 | serge | 556 | ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE | PIN_NONBLOCK); |
3031 | serge | 557 | if (ret) |
558 | goto out; |
||
559 | |||
560 | ret = i915_gem_object_set_to_gtt_domain(obj, true); |
||
561 | if (ret) |
||
562 | goto out_unpin; |
||
563 | |||
564 | ret = i915_gem_object_put_fence(obj); |
||
565 | if (ret) |
||
566 | goto out_unpin; |
||
567 | |||
4539 | Serge | 568 | user_data = to_user_ptr(args->data_ptr); |
2332 | Serge | 569 | remain = args->size; |
570 | |||
4104 | Serge | 571 | offset = i915_gem_obj_ggtt_offset(obj) + args->offset; |
2332 | Serge | 572 | |
6084 | serge | 573 | intel_fb_obj_invalidate(obj, ORIGIN_GTT); |
574 | |||
3031 | serge | 575 | while (remain > 0) { |
576 | /* Operation in this page |
||
577 | * |
||
578 | * page_base = page offset within aperture |
||
579 | * page_offset = offset within page |
||
580 | * page_length = bytes to copy for this page |
||
581 | */ |
||
582 | page_base = offset & PAGE_MASK; |
||
583 | page_offset = offset_in_page(offset); |
||
584 | page_length = remain; |
||
585 | if ((page_offset + remain) > PAGE_SIZE) |
||
586 | page_length = PAGE_SIZE - page_offset; |
||
2332 | Serge | 587 | |
4539 | Serge | 588 | MapPage(dev_priv->gtt.mappable, dev_priv->gtt.mappable_base+page_base, PG_SW); |
3031 | serge | 589 | |
5060 | serge | 590 | memcpy((char*)dev_priv->gtt.mappable+page_offset, user_data, page_length); |
3260 | Serge | 591 | |
3031 | serge | 592 | remain -= page_length; |
593 | user_data += page_length; |
||
594 | offset += page_length; |
||
2332 | Serge | 595 | } |
596 | |||
6084 | serge | 597 | out_flush: |
598 | intel_fb_obj_flush(obj, false, ORIGIN_GTT); |
||
3031 | serge | 599 | out_unpin: |
5060 | serge | 600 | i915_gem_object_ggtt_unpin(obj); |
3031 | serge | 601 | out: |
6084 | serge | 602 | return ret; |
3031 | serge | 603 | } |
604 | |||
605 | /* Per-page copy function for the shmem pwrite fastpath. |
||
606 | * Flushes invalid cachelines before writing to the target if |
||
607 | * needs_clflush_before is set and flushes out any written cachelines after |
||
608 | * writing if needs_clflush is set. */ |
||
609 | static int |
||
610 | shmem_pwrite_fast(struct page *page, int shmem_page_offset, int page_length, |
||
611 | char __user *user_data, |
||
612 | bool page_do_bit17_swizzling, |
||
613 | bool needs_clflush_before, |
||
614 | bool needs_clflush_after) |
||
615 | { |
||
616 | char *vaddr; |
||
5354 | serge | 617 | int ret; |
3031 | serge | 618 | |
619 | if (unlikely(page_do_bit17_swizzling)) |
||
620 | return -EINVAL; |
||
621 | |||
5354 | serge | 622 | vaddr = kmap_atomic(page); |
3031 | serge | 623 | if (needs_clflush_before) |
624 | drm_clflush_virt_range(vaddr + shmem_page_offset, |
||
625 | page_length); |
||
3260 | Serge | 626 | memcpy(vaddr + shmem_page_offset, |
3031 | serge | 627 | user_data, |
628 | page_length); |
||
629 | if (needs_clflush_after) |
||
630 | drm_clflush_virt_range(vaddr + shmem_page_offset, |
||
631 | page_length); |
||
5354 | serge | 632 | kunmap_atomic(vaddr); |
3031 | serge | 633 | |
634 | return ret ? -EFAULT : 0; |
||
635 | } |
||
3260 | Serge | 636 | #if 0 |
3031 | serge | 637 | |
638 | /* Only difference to the fast-path function is that this can handle bit17 |
||
639 | * and uses non-atomic copy and kmap functions. */ |
||
640 | static int |
||
641 | shmem_pwrite_slow(struct page *page, int shmem_page_offset, int page_length, |
||
642 | char __user *user_data, |
||
643 | bool page_do_bit17_swizzling, |
||
644 | bool needs_clflush_before, |
||
645 | bool needs_clflush_after) |
||
646 | { |
||
647 | char *vaddr; |
||
648 | int ret; |
||
649 | |||
650 | vaddr = kmap(page); |
||
651 | if (unlikely(needs_clflush_before || page_do_bit17_swizzling)) |
||
652 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
||
653 | page_length, |
||
654 | page_do_bit17_swizzling); |
||
655 | if (page_do_bit17_swizzling) |
||
656 | ret = __copy_from_user_swizzled(vaddr, shmem_page_offset, |
||
657 | user_data, |
||
658 | page_length); |
||
659 | else |
||
660 | ret = __copy_from_user(vaddr + shmem_page_offset, |
||
661 | user_data, |
||
662 | page_length); |
||
663 | if (needs_clflush_after) |
||
664 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
||
665 | page_length, |
||
666 | page_do_bit17_swizzling); |
||
667 | kunmap(page); |
||
668 | |||
669 | return ret ? -EFAULT : 0; |
||
670 | } |
||
3260 | Serge | 671 | #endif |
3031 | serge | 672 | |
3260 | Serge | 673 | |
3031 | serge | 674 | static int |
675 | i915_gem_shmem_pwrite(struct drm_device *dev, |
||
676 | struct drm_i915_gem_object *obj, |
||
677 | struct drm_i915_gem_pwrite *args, |
||
678 | struct drm_file *file) |
||
679 | { |
||
680 | ssize_t remain; |
||
681 | loff_t offset; |
||
682 | char __user *user_data; |
||
683 | int shmem_page_offset, page_length, ret = 0; |
||
684 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
||
685 | int hit_slowpath = 0; |
||
686 | int needs_clflush_after = 0; |
||
687 | int needs_clflush_before = 0; |
||
3746 | Serge | 688 | struct sg_page_iter sg_iter; |
3031 | serge | 689 | |
3746 | Serge | 690 | user_data = to_user_ptr(args->data_ptr); |
3031 | serge | 691 | remain = args->size; |
692 | |||
693 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
||
694 | |||
695 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
||
696 | /* If we're not in the cpu write domain, set ourself into the gtt |
||
697 | * write domain and manually flush cachelines (if required). This |
||
698 | * optimizes for the case when the gpu will use the data |
||
699 | * right away and we therefore have to clflush anyway. */ |
||
4104 | Serge | 700 | needs_clflush_after = cpu_write_needs_clflush(obj); |
4560 | Serge | 701 | ret = i915_gem_object_wait_rendering(obj, false); |
6084 | serge | 702 | if (ret) |
703 | return ret; |
||
704 | } |
||
4104 | Serge | 705 | /* Same trick applies to invalidate partially written cachelines read |
706 | * before writing. */ |
||
707 | if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) |
||
708 | needs_clflush_before = |
||
709 | !cpu_cache_is_coherent(dev, obj->cache_level); |
||
3031 | serge | 710 | |
711 | ret = i915_gem_object_get_pages(obj); |
||
2332 | Serge | 712 | if (ret) |
3031 | serge | 713 | return ret; |
2332 | Serge | 714 | |
6084 | serge | 715 | intel_fb_obj_invalidate(obj, ORIGIN_CPU); |
716 | |||
3031 | serge | 717 | i915_gem_object_pin_pages(obj); |
2332 | Serge | 718 | |
719 | offset = args->offset; |
||
3031 | serge | 720 | obj->dirty = 1; |
2332 | Serge | 721 | |
3746 | Serge | 722 | for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, |
723 | offset >> PAGE_SHIFT) { |
||
724 | struct page *page = sg_page_iter_page(&sg_iter); |
||
3031 | serge | 725 | int partial_cacheline_write; |
2332 | Serge | 726 | |
3031 | serge | 727 | if (remain <= 0) |
728 | break; |
||
729 | |||
2332 | Serge | 730 | /* Operation in this page |
731 | * |
||
732 | * shmem_page_offset = offset within page in shmem file |
||
733 | * page_length = bytes to copy for this page |
||
734 | */ |
||
735 | shmem_page_offset = offset_in_page(offset); |
||
736 | |||
737 | page_length = remain; |
||
738 | if ((shmem_page_offset + page_length) > PAGE_SIZE) |
||
739 | page_length = PAGE_SIZE - shmem_page_offset; |
||
740 | |||
3031 | serge | 741 | /* If we don't overwrite a cacheline completely we need to be |
742 | * careful to have up-to-date data by first clflushing. Don't |
||
743 | * overcomplicate things and flush the entire patch. */ |
||
744 | partial_cacheline_write = needs_clflush_before && |
||
745 | ((shmem_page_offset | page_length) |
||
3260 | Serge | 746 | & (x86_clflush_size - 1)); |
2332 | Serge | 747 | |
3031 | serge | 748 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
749 | (page_to_phys(page) & (1 << 17)) != 0; |
||
2332 | Serge | 750 | |
3031 | serge | 751 | ret = shmem_pwrite_fast(page, shmem_page_offset, page_length, |
752 | user_data, page_do_bit17_swizzling, |
||
753 | partial_cacheline_write, |
||
754 | needs_clflush_after); |
||
755 | if (ret == 0) |
||
756 | goto next_page; |
||
757 | |||
758 | hit_slowpath = 1; |
||
759 | mutex_unlock(&dev->struct_mutex); |
||
3260 | Serge | 760 | dbgprintf("%s need shmem_pwrite_slow\n",__FUNCTION__); |
3031 | serge | 761 | |
3260 | Serge | 762 | // ret = shmem_pwrite_slow(page, shmem_page_offset, page_length, |
763 | // user_data, page_do_bit17_swizzling, |
||
764 | // partial_cacheline_write, |
||
765 | // needs_clflush_after); |
||
766 | |||
3031 | serge | 767 | mutex_lock(&dev->struct_mutex); |
768 | |||
769 | if (ret) |
||
770 | goto out; |
||
771 | |||
5354 | serge | 772 | next_page: |
2332 | Serge | 773 | remain -= page_length; |
3031 | serge | 774 | user_data += page_length; |
2332 | Serge | 775 | offset += page_length; |
776 | } |
||
777 | |||
778 | out: |
||
3031 | serge | 779 | i915_gem_object_unpin_pages(obj); |
780 | |||
781 | if (hit_slowpath) { |
||
3480 | Serge | 782 | /* |
783 | * Fixup: Flush cpu caches in case we didn't flush the dirty |
||
784 | * cachelines in-line while writing and the object moved |
||
785 | * out of the cpu write domain while we've dropped the lock. |
||
786 | */ |
||
787 | if (!needs_clflush_after && |
||
788 | obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
||
4104 | Serge | 789 | if (i915_gem_clflush_object(obj, obj->pin_display)) |
6084 | serge | 790 | needs_clflush_after = true; |
3031 | serge | 791 | } |
2332 | Serge | 792 | } |
793 | |||
3031 | serge | 794 | if (needs_clflush_after) |
3243 | Serge | 795 | i915_gem_chipset_flush(dev); |
6084 | serge | 796 | else |
797 | obj->cache_dirty = true; |
||
3031 | serge | 798 | |
6084 | serge | 799 | intel_fb_obj_flush(obj, false, ORIGIN_CPU); |
2332 | Serge | 800 | return ret; |
801 | } |
||
3031 | serge | 802 | |
803 | /** |
||
804 | * Writes data to the object referenced by handle. |
||
805 | * |
||
806 | * On error, the contents of the buffer that were to be modified are undefined. |
||
807 | */ |
||
808 | int |
||
809 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, |
||
810 | struct drm_file *file) |
||
811 | { |
||
6084 | serge | 812 | struct drm_i915_private *dev_priv = dev->dev_private; |
3031 | serge | 813 | struct drm_i915_gem_pwrite *args = data; |
814 | struct drm_i915_gem_object *obj; |
||
815 | int ret; |
||
816 | |||
4104 | Serge | 817 | if (args->size == 0) |
818 | return 0; |
||
819 | |||
6084 | serge | 820 | intel_runtime_pm_get(dev_priv); |
3480 | Serge | 821 | |
3031 | serge | 822 | ret = i915_mutex_lock_interruptible(dev); |
823 | if (ret) |
||
6084 | serge | 824 | goto put_rpm; |
3031 | serge | 825 | |
826 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
||
827 | if (&obj->base == NULL) { |
||
828 | ret = -ENOENT; |
||
829 | goto unlock; |
||
830 | } |
||
831 | |||
832 | /* Bounds check destination. */ |
||
833 | if (args->offset > obj->base.size || |
||
834 | args->size > obj->base.size - args->offset) { |
||
835 | ret = -EINVAL; |
||
836 | goto out; |
||
837 | } |
||
838 | |||
839 | /* prime objects have no backing filp to GEM pread/pwrite |
||
840 | * pages from. |
||
841 | */ |
||
842 | if (!obj->base.filp) { |
||
843 | ret = -EINVAL; |
||
844 | goto out; |
||
845 | } |
||
846 | |||
847 | trace_i915_gem_object_pwrite(obj, args->offset, args->size); |
||
848 | |||
849 | ret = -EFAULT; |
||
850 | /* We can only do the GTT pwrite on untiled buffers, as otherwise |
||
851 | * it would end up going through the fenced access, and we'll get |
||
852 | * different detiling behavior between reading and writing. |
||
853 | * pread/pwrite currently are reading and writing from the CPU |
||
854 | * perspective, requiring manual detiling by the client. |
||
855 | */ |
||
4104 | Serge | 856 | if (obj->tiling_mode == I915_TILING_NONE && |
857 | obj->base.write_domain != I915_GEM_DOMAIN_CPU && |
||
858 | cpu_write_needs_clflush(obj)) { |
||
3031 | serge | 859 | ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file); |
860 | /* Note that the gtt paths might fail with non-page-backed user |
||
861 | * pointers (e.g. gtt mappings when moving data between |
||
862 | * textures). Fallback to the shmem path in that case. */ |
||
863 | } |
||
864 | |||
865 | if (ret == -EFAULT || ret == -ENOSPC) |
||
6084 | serge | 866 | ret = i915_gem_shmem_pwrite(dev, obj, args, file); |
3031 | serge | 867 | |
868 | out: |
||
869 | drm_gem_object_unreference(&obj->base); |
||
870 | unlock: |
||
871 | mutex_unlock(&dev->struct_mutex); |
||
6084 | serge | 872 | put_rpm: |
873 | intel_runtime_pm_put(dev_priv); |
||
874 | |||
3031 | serge | 875 | return ret; |
876 | } |
||
877 | |||
878 | int |
||
3480 | Serge | 879 | i915_gem_check_wedge(struct i915_gpu_error *error, |
3031 | serge | 880 | bool interruptible) |
881 | { |
||
3480 | Serge | 882 | if (i915_reset_in_progress(error)) { |
3031 | serge | 883 | /* Non-interruptible callers can't handle -EAGAIN, hence return |
884 | * -EIO unconditionally for these. */ |
||
885 | if (!interruptible) |
||
886 | return -EIO; |
||
2332 | Serge | 887 | |
3480 | Serge | 888 | /* Recovery complete, but the reset failed ... */ |
889 | if (i915_terminally_wedged(error)) |
||
3031 | serge | 890 | return -EIO; |
2332 | Serge | 891 | |
6084 | serge | 892 | /* |
893 | * Check if GPU Reset is in progress - we need intel_ring_begin |
||
894 | * to work properly to reinit the hw state while the gpu is |
||
895 | * still marked as reset-in-progress. Handle this with a flag. |
||
896 | */ |
||
897 | if (!error->reload_in_reset) |
||
898 | return -EAGAIN; |
||
3031 | serge | 899 | } |
2332 | Serge | 900 | |
3031 | serge | 901 | return 0; |
902 | } |
||
2332 | Serge | 903 | |
4560 | Serge | 904 | static void fake_irq(unsigned long data) |
905 | { |
||
906 | // wake_up_process((struct task_struct *)data); |
||
907 | } |
||
908 | |||
909 | static bool missed_irq(struct drm_i915_private *dev_priv, |
||
5060 | serge | 910 | struct intel_engine_cs *ring) |
4560 | Serge | 911 | { |
912 | return test_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings); |
||
913 | } |
||
914 | |||
6084 | serge | 915 | static unsigned long local_clock_us(unsigned *cpu) |
4560 | Serge | 916 | { |
6084 | serge | 917 | unsigned long t; |
918 | |||
919 | /* Cheaply and approximately convert from nanoseconds to microseconds. |
||
920 | * The result and subsequent calculations are also defined in the same |
||
921 | * approximate microseconds units. The principal source of timing |
||
922 | * error here is from the simple truncation. |
||
923 | * |
||
924 | * Note that local_clock() is only defined wrt to the current CPU; |
||
925 | * the comparisons are no longer valid if we switch CPUs. Instead of |
||
926 | * blocking preemption for the entire busywait, we can detect the CPU |
||
927 | * switch and use that as indicator of system load and a reason to |
||
928 | * stop busywaiting, see busywait_stop(). |
||
929 | */ |
||
930 | t = GetClockNs() >> 10; |
||
931 | |||
932 | return t; |
||
933 | } |
||
934 | |||
935 | static bool busywait_stop(unsigned long timeout, unsigned cpu) |
||
936 | { |
||
937 | unsigned this_cpu = 0; |
||
938 | |||
939 | if (time_after(local_clock_us(&this_cpu), timeout)) |
||
4560 | Serge | 940 | return true; |
941 | |||
6084 | serge | 942 | return this_cpu != cpu; |
4560 | Serge | 943 | } |
944 | |||
6084 | serge | 945 | static int __i915_spin_request(struct drm_i915_gem_request *req, int state) |
946 | { |
||
947 | unsigned long timeout; |
||
948 | unsigned cpu; |
||
949 | |||
950 | /* When waiting for high frequency requests, e.g. during synchronous |
||
951 | * rendering split between the CPU and GPU, the finite amount of time |
||
952 | * required to set up the irq and wait upon it limits the response |
||
953 | * rate. By busywaiting on the request completion for a short while we |
||
954 | * can service the high frequency waits as quick as possible. However, |
||
955 | * if it is a slow request, we want to sleep as quickly as possible. |
||
956 | * The tradeoff between waiting and sleeping is roughly the time it |
||
957 | * takes to sleep on a request, on the order of a microsecond. |
||
958 | */ |
||
959 | |||
960 | if (req->ring->irq_refcount) |
||
961 | return -EBUSY; |
||
962 | |||
963 | /* Only spin if we know the GPU is processing this request */ |
||
964 | if (!i915_gem_request_started(req, true)) |
||
965 | return -EAGAIN; |
||
966 | |||
967 | timeout = local_clock_us(&cpu) + 5; |
||
968 | while (1 /*!need_resched()*/) { |
||
969 | if (i915_gem_request_completed(req, true)) |
||
970 | return 0; |
||
971 | |||
972 | if (busywait_stop(timeout, cpu)) |
||
973 | break; |
||
974 | |||
975 | cpu_relax_lowlatency(); |
||
976 | } |
||
977 | |||
978 | if (i915_gem_request_completed(req, false)) |
||
979 | return 0; |
||
980 | |||
981 | return -EAGAIN; |
||
982 | } |
||
983 | |||
3031 | serge | 984 | /** |
6084 | serge | 985 | * __i915_wait_request - wait until execution of request has finished |
986 | * @req: duh! |
||
987 | * @reset_counter: reset sequence associated with the given request |
||
3031 | serge | 988 | * @interruptible: do an interruptible wait (normally yes) |
989 | * @timeout: in - how long to wait (NULL forever); out - how much time remaining |
||
990 | * |
||
3480 | Serge | 991 | * Note: It is of utmost importance that the passed in seqno and reset_counter |
992 | * values have been read by the caller in an smp safe manner. Where read-side |
||
993 | * locks are involved, it is sufficient to read the reset_counter before |
||
994 | * unlocking the lock that protects the seqno. For lockless tricks, the |
||
995 | * reset_counter _must_ be read before, and an appropriate smp_rmb must be |
||
996 | * inserted. |
||
997 | * |
||
6084 | serge | 998 | * Returns 0 if the request was found within the alloted time. Else returns the |
3031 | serge | 999 | * errno with remaining time filled in timeout argument. |
1000 | */ |
||
6084 | serge | 1001 | int __i915_wait_request(struct drm_i915_gem_request *req, |
3480 | Serge | 1002 | unsigned reset_counter, |
4560 | Serge | 1003 | bool interruptible, |
5060 | serge | 1004 | s64 *timeout, |
6084 | serge | 1005 | struct intel_rps_client *rps) |
3031 | serge | 1006 | { |
6084 | serge | 1007 | struct intel_engine_cs *ring = i915_gem_request_get_ring(req); |
5060 | serge | 1008 | struct drm_device *dev = ring->dev; |
1009 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
4560 | Serge | 1010 | const bool irq_test_in_progress = |
1011 | ACCESS_ONCE(dev_priv->gpu_error.test_irq_rings) & intel_ring_flag(ring); |
||
6084 | serge | 1012 | int state = interruptible ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE; |
6088 | serge | 1013 | wait_queue_t wait; |
5060 | serge | 1014 | unsigned long timeout_expire; |
1015 | s64 before, now; |
||
3031 | serge | 1016 | int ret; |
2332 | Serge | 1017 | |
5060 | serge | 1018 | WARN(!intel_irqs_enabled(dev_priv), "IRQs disabled"); |
4104 | Serge | 1019 | |
6084 | serge | 1020 | if (list_empty(&req->list)) |
3031 | serge | 1021 | return 0; |
2332 | Serge | 1022 | |
6084 | serge | 1023 | if (i915_gem_request_completed(req, true)) |
1024 | return 0; |
||
2332 | Serge | 1025 | |
6084 | serge | 1026 | timeout_expire = 0; |
1027 | if (timeout) { |
||
1028 | if (WARN_ON(*timeout < 0)) |
||
1029 | return -EINVAL; |
||
1030 | |||
1031 | if (*timeout == 0) |
||
1032 | return -ETIME; |
||
1033 | |||
1034 | timeout_expire = jiffies + nsecs_to_jiffies_timeout(*timeout); |
||
3031 | serge | 1035 | } |
2332 | Serge | 1036 | |
6084 | serge | 1037 | if (INTEL_INFO(dev_priv)->gen >= 6) |
1038 | gen6_rps_boost(dev_priv, rps, req->emitted_jiffies); |
||
2332 | Serge | 1039 | |
6084 | serge | 1040 | /* Record current time in case interrupted by signal, or wedged */ |
1041 | trace_i915_gem_request_wait_begin(req); |
||
1042 | before = ktime_get_raw_ns(); |
||
1043 | |||
1044 | /* Optimistic spin for the next jiffie before touching IRQs */ |
||
1045 | ret = __i915_spin_request(req, state); |
||
1046 | if (ret == 0) |
||
1047 | goto out; |
||
1048 | |||
1049 | if (!irq_test_in_progress && WARN_ON(!ring->irq_get(ring))) { |
||
1050 | ret = -ENODEV; |
||
1051 | goto out; |
||
1052 | } |
||
1053 | |||
6088 | serge | 1054 | INIT_LIST_HEAD(&wait.task_list); |
1055 | wait.evnt = CreateEvent(NULL, MANUAL_DESTROY); |
||
2332 | Serge | 1056 | |
4560 | Serge | 1057 | for (;;) { |
1058 | unsigned long flags; |
||
1059 | |||
3480 | Serge | 1060 | /* We need to check whether any gpu reset happened in between |
1061 | * the caller grabbing the seqno and now ... */ |
||
4560 | Serge | 1062 | if (reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter)) { |
1063 | /* ... but upgrade the -EAGAIN to an -EIO if the gpu |
||
1064 | * is truely gone. */ |
||
1065 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible); |
||
1066 | if (ret == 0) |
||
1067 | ret = -EAGAIN; |
||
1068 | break; |
||
1069 | } |
||
3480 | Serge | 1070 | |
6084 | serge | 1071 | if (i915_gem_request_completed(req, false)) { |
4560 | Serge | 1072 | ret = 0; |
1073 | break; |
||
1074 | } |
||
2332 | Serge | 1075 | |
6088 | serge | 1076 | if (timeout && time_after_eq(jiffies, timeout_expire)) { |
4560 | Serge | 1077 | ret = -ETIME; |
1078 | break; |
||
1079 | } |
||
2332 | Serge | 1080 | |
4560 | Serge | 1081 | spin_lock_irqsave(&ring->irq_queue.lock, flags); |
6088 | serge | 1082 | if (list_empty(&wait.task_list)) |
1083 | __add_wait_queue(&ring->irq_queue, &wait); |
||
4560 | Serge | 1084 | spin_unlock_irqrestore(&ring->irq_queue.lock, flags); |
1085 | |||
6088 | serge | 1086 | WaitEventTimeout(wait.evnt, 1); |
4560 | Serge | 1087 | |
6088 | serge | 1088 | if (!list_empty(&wait.task_list)) { |
4560 | Serge | 1089 | spin_lock_irqsave(&ring->irq_queue.lock, flags); |
6088 | serge | 1090 | list_del_init(&wait.task_list); |
4560 | Serge | 1091 | spin_unlock_irqrestore(&ring->irq_queue.lock, flags); |
1092 | } |
||
1093 | |||
6088 | serge | 1094 | }; |
4560 | Serge | 1095 | |
1096 | if (!irq_test_in_progress) |
||
6084 | serge | 1097 | ring->irq_put(ring); |
2332 | Serge | 1098 | |
6088 | serge | 1099 | DestroyEvent(wait.evnt); |
1100 | |||
6084 | serge | 1101 | out: |
1102 | now = ktime_get_raw_ns(); |
||
1103 | trace_i915_gem_request_wait_end(req); |
||
1104 | |||
1105 | if (timeout) { |
||
1106 | s64 tres = *timeout - (now - before); |
||
1107 | |||
1108 | *timeout = tres < 0 ? 0 : tres; |
||
1109 | |||
1110 | /* |
||
1111 | * Apparently ktime isn't accurate enough and occasionally has a |
||
1112 | * bit of mismatch in the jiffies<->nsecs<->ktime loop. So patch |
||
1113 | * things up to make the test happy. We allow up to 1 jiffy. |
||
1114 | * |
||
1115 | * This is a regrssion from the timespec->ktime conversion. |
||
1116 | */ |
||
1117 | if (ret == -ETIME && *timeout < jiffies_to_usecs(1)*1000) |
||
1118 | *timeout = 0; |
||
1119 | } |
||
1120 | |||
4560 | Serge | 1121 | return ret; |
3031 | serge | 1122 | } |
2332 | Serge | 1123 | |
6084 | serge | 1124 | int i915_gem_request_add_to_client(struct drm_i915_gem_request *req, |
1125 | struct drm_file *file) |
||
1126 | { |
||
1127 | struct drm_i915_private *dev_private; |
||
1128 | struct drm_i915_file_private *file_priv; |
||
1129 | |||
1130 | WARN_ON(!req || !file || req->file_priv); |
||
1131 | |||
1132 | if (!req || !file) |
||
1133 | return -EINVAL; |
||
1134 | |||
1135 | if (req->file_priv) |
||
1136 | return -EINVAL; |
||
1137 | |||
1138 | dev_private = req->ring->dev->dev_private; |
||
1139 | file_priv = file->driver_priv; |
||
1140 | |||
1141 | spin_lock(&file_priv->mm.lock); |
||
1142 | req->file_priv = file_priv; |
||
1143 | list_add_tail(&req->client_list, &file_priv->mm.request_list); |
||
1144 | spin_unlock(&file_priv->mm.lock); |
||
1145 | |||
1146 | req->pid = 1; |
||
1147 | |||
1148 | return 0; |
||
1149 | } |
||
1150 | |||
1151 | static inline void |
||
1152 | i915_gem_request_remove_from_client(struct drm_i915_gem_request *request) |
||
1153 | { |
||
1154 | struct drm_i915_file_private *file_priv = request->file_priv; |
||
1155 | |||
1156 | if (!file_priv) |
||
1157 | return; |
||
1158 | |||
1159 | spin_lock(&file_priv->mm.lock); |
||
1160 | list_del(&request->client_list); |
||
1161 | request->file_priv = NULL; |
||
1162 | spin_unlock(&file_priv->mm.lock); |
||
1163 | } |
||
1164 | |||
1165 | static void i915_gem_request_retire(struct drm_i915_gem_request *request) |
||
1166 | { |
||
1167 | trace_i915_gem_request_retire(request); |
||
1168 | |||
1169 | /* We know the GPU must have read the request to have |
||
1170 | * sent us the seqno + interrupt, so use the position |
||
1171 | * of tail of the request to update the last known position |
||
1172 | * of the GPU head. |
||
1173 | * |
||
1174 | * Note this requires that we are always called in request |
||
1175 | * completion order. |
||
1176 | */ |
||
1177 | request->ringbuf->last_retired_head = request->postfix; |
||
1178 | |||
1179 | list_del_init(&request->list); |
||
1180 | i915_gem_request_remove_from_client(request); |
||
1181 | |||
1182 | i915_gem_request_unreference(request); |
||
1183 | } |
||
1184 | |||
1185 | static void |
||
1186 | __i915_gem_request_retire__upto(struct drm_i915_gem_request *req) |
||
1187 | { |
||
1188 | struct intel_engine_cs *engine = req->ring; |
||
1189 | struct drm_i915_gem_request *tmp; |
||
1190 | |||
1191 | |||
1192 | if (list_empty(&req->list)) |
||
1193 | return; |
||
1194 | |||
1195 | do { |
||
1196 | tmp = list_first_entry(&engine->request_list, |
||
1197 | typeof(*tmp), list); |
||
1198 | |||
1199 | i915_gem_request_retire(tmp); |
||
1200 | } while (tmp != req); |
||
1201 | |||
1202 | WARN_ON(i915_verify_lists(engine->dev)); |
||
1203 | } |
||
1204 | |||
3031 | serge | 1205 | /** |
6084 | serge | 1206 | * Waits for a request to be signaled, and cleans up the |
3031 | serge | 1207 | * request and object lists appropriately for that event. |
1208 | */ |
||
1209 | int |
||
6084 | serge | 1210 | i915_wait_request(struct drm_i915_gem_request *req) |
3031 | serge | 1211 | { |
6084 | serge | 1212 | struct drm_device *dev; |
1213 | struct drm_i915_private *dev_priv; |
||
1214 | bool interruptible; |
||
3031 | serge | 1215 | int ret; |
2332 | Serge | 1216 | |
6084 | serge | 1217 | BUG_ON(req == NULL); |
1218 | |||
1219 | dev = req->ring->dev; |
||
1220 | dev_priv = dev->dev_private; |
||
1221 | interruptible = dev_priv->mm.interruptible; |
||
1222 | |||
3031 | serge | 1223 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); |
2332 | Serge | 1224 | |
3480 | Serge | 1225 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible); |
3031 | serge | 1226 | if (ret) |
1227 | return ret; |
||
2332 | Serge | 1228 | |
6084 | serge | 1229 | ret = __i915_wait_request(req, |
1230 | atomic_read(&dev_priv->gpu_error.reset_counter), |
||
1231 | interruptible, NULL, NULL); |
||
3031 | serge | 1232 | if (ret) |
1233 | return ret; |
||
2332 | Serge | 1234 | |
6084 | serge | 1235 | __i915_gem_request_retire__upto(req); |
4104 | Serge | 1236 | return 0; |
1237 | } |
||
1238 | |||
3031 | serge | 1239 | /** |
1240 | * Ensures that all rendering to the object has completed and the object is |
||
1241 | * safe to unbind from the GTT or access from the CPU. |
||
1242 | */ |
||
6084 | serge | 1243 | int |
3031 | serge | 1244 | i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj, |
1245 | bool readonly) |
||
1246 | { |
||
6084 | serge | 1247 | int ret, i; |
2332 | Serge | 1248 | |
6084 | serge | 1249 | if (!obj->active) |
3031 | serge | 1250 | return 0; |
2332 | Serge | 1251 | |
6084 | serge | 1252 | if (readonly) { |
1253 | if (obj->last_write_req != NULL) { |
||
1254 | ret = i915_wait_request(obj->last_write_req); |
||
1255 | if (ret) |
||
1256 | return ret; |
||
2332 | Serge | 1257 | |
6084 | serge | 1258 | i = obj->last_write_req->ring->id; |
1259 | if (obj->last_read_req[i] == obj->last_write_req) |
||
1260 | i915_gem_object_retire__read(obj, i); |
||
1261 | else |
||
1262 | i915_gem_object_retire__write(obj); |
||
1263 | } |
||
1264 | } else { |
||
1265 | for (i = 0; i < I915_NUM_RINGS; i++) { |
||
1266 | if (obj->last_read_req[i] == NULL) |
||
1267 | continue; |
||
1268 | |||
1269 | ret = i915_wait_request(obj->last_read_req[i]); |
||
1270 | if (ret) |
||
1271 | return ret; |
||
1272 | |||
1273 | i915_gem_object_retire__read(obj, i); |
||
1274 | } |
||
1275 | RQ_BUG_ON(obj->active); |
||
1276 | } |
||
1277 | |||
1278 | return 0; |
||
3031 | serge | 1279 | } |
2332 | Serge | 1280 | |
6084 | serge | 1281 | static void |
1282 | i915_gem_object_retire_request(struct drm_i915_gem_object *obj, |
||
1283 | struct drm_i915_gem_request *req) |
||
1284 | { |
||
1285 | int ring = req->ring->id; |
||
1286 | |||
1287 | if (obj->last_read_req[ring] == req) |
||
1288 | i915_gem_object_retire__read(obj, ring); |
||
1289 | else if (obj->last_write_req == req) |
||
1290 | i915_gem_object_retire__write(obj); |
||
1291 | |||
1292 | __i915_gem_request_retire__upto(req); |
||
1293 | } |
||
1294 | |||
3260 | Serge | 1295 | /* A nonblocking variant of the above wait. This is a highly dangerous routine |
1296 | * as the object state may change during this call. |
||
1297 | */ |
||
1298 | static __must_check int |
||
1299 | i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj, |
||
6084 | serge | 1300 | struct intel_rps_client *rps, |
3260 | Serge | 1301 | bool readonly) |
1302 | { |
||
1303 | struct drm_device *dev = obj->base.dev; |
||
1304 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
6084 | serge | 1305 | struct drm_i915_gem_request *requests[I915_NUM_RINGS]; |
3480 | Serge | 1306 | unsigned reset_counter; |
6084 | serge | 1307 | int ret, i, n = 0; |
2332 | Serge | 1308 | |
3260 | Serge | 1309 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); |
1310 | BUG_ON(!dev_priv->mm.interruptible); |
||
2332 | Serge | 1311 | |
6084 | serge | 1312 | if (!obj->active) |
3260 | Serge | 1313 | return 0; |
2332 | Serge | 1314 | |
3480 | Serge | 1315 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, true); |
3260 | Serge | 1316 | if (ret) |
1317 | return ret; |
||
2332 | Serge | 1318 | |
6084 | serge | 1319 | reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); |
2332 | Serge | 1320 | |
6084 | serge | 1321 | if (readonly) { |
1322 | struct drm_i915_gem_request *req; |
||
1323 | |||
1324 | req = obj->last_write_req; |
||
1325 | if (req == NULL) |
||
1326 | return 0; |
||
1327 | |||
1328 | requests[n++] = i915_gem_request_reference(req); |
||
1329 | } else { |
||
1330 | for (i = 0; i < I915_NUM_RINGS; i++) { |
||
1331 | struct drm_i915_gem_request *req; |
||
1332 | |||
1333 | req = obj->last_read_req[i]; |
||
1334 | if (req == NULL) |
||
1335 | continue; |
||
1336 | |||
1337 | requests[n++] = i915_gem_request_reference(req); |
||
1338 | } |
||
1339 | } |
||
1340 | |||
3260 | Serge | 1341 | mutex_unlock(&dev->struct_mutex); |
6084 | serge | 1342 | for (i = 0; ret == 0 && i < n; i++) |
1343 | ret = __i915_wait_request(requests[i], reset_counter, true, |
||
1344 | NULL, rps); |
||
3260 | Serge | 1345 | mutex_lock(&dev->struct_mutex); |
2332 | Serge | 1346 | |
6084 | serge | 1347 | for (i = 0; i < n; i++) { |
1348 | if (ret == 0) |
||
1349 | i915_gem_object_retire_request(obj, requests[i]); |
||
1350 | i915_gem_request_unreference(requests[i]); |
||
1351 | } |
||
1352 | |||
1353 | return ret; |
||
3260 | Serge | 1354 | } |
2332 | Serge | 1355 | |
6084 | serge | 1356 | static struct intel_rps_client *to_rps_client(struct drm_file *file) |
1357 | { |
||
1358 | struct drm_i915_file_private *fpriv = file->driver_priv; |
||
1359 | return &fpriv->rps; |
||
1360 | } |
||
1361 | |||
3260 | Serge | 1362 | /** |
1363 | * Called when user space prepares to use an object with the CPU, either |
||
1364 | * through the mmap ioctl's mapping or a GTT mapping. |
||
1365 | */ |
||
1366 | int |
||
1367 | i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, |
||
1368 | struct drm_file *file) |
||
1369 | { |
||
1370 | struct drm_i915_gem_set_domain *args = data; |
||
1371 | struct drm_i915_gem_object *obj; |
||
1372 | uint32_t read_domains = args->read_domains; |
||
1373 | uint32_t write_domain = args->write_domain; |
||
1374 | int ret; |
||
2332 | Serge | 1375 | |
3260 | Serge | 1376 | /* Only handle setting domains to types used by the CPU. */ |
1377 | if (write_domain & I915_GEM_GPU_DOMAINS) |
||
1378 | return -EINVAL; |
||
2332 | Serge | 1379 | |
3260 | Serge | 1380 | if (read_domains & I915_GEM_GPU_DOMAINS) |
1381 | return -EINVAL; |
||
2332 | Serge | 1382 | |
3260 | Serge | 1383 | /* Having something in the write domain implies it's in the read |
1384 | * domain, and only that read domain. Enforce that in the request. |
||
1385 | */ |
||
1386 | if (write_domain != 0 && read_domains != write_domain) |
||
1387 | return -EINVAL; |
||
2332 | Serge | 1388 | |
3260 | Serge | 1389 | ret = i915_mutex_lock_interruptible(dev); |
1390 | if (ret) |
||
1391 | return ret; |
||
2332 | Serge | 1392 | |
3260 | Serge | 1393 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
1394 | if (&obj->base == NULL) { |
||
1395 | ret = -ENOENT; |
||
1396 | goto unlock; |
||
1397 | } |
||
2332 | Serge | 1398 | |
3260 | Serge | 1399 | /* Try to flush the object off the GPU without holding the lock. |
1400 | * We will repeat the flush holding the lock in the normal manner |
||
1401 | * to catch cases where we are gazumped. |
||
1402 | */ |
||
5060 | serge | 1403 | ret = i915_gem_object_wait_rendering__nonblocking(obj, |
6084 | serge | 1404 | to_rps_client(file), |
5060 | serge | 1405 | !write_domain); |
3260 | Serge | 1406 | if (ret) |
1407 | goto unref; |
||
2332 | Serge | 1408 | |
6084 | serge | 1409 | if (read_domains & I915_GEM_DOMAIN_GTT) |
3260 | Serge | 1410 | ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0); |
6084 | serge | 1411 | else |
3260 | Serge | 1412 | ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0); |
2332 | Serge | 1413 | |
6084 | serge | 1414 | if (write_domain != 0) |
1415 | intel_fb_obj_invalidate(obj, |
||
1416 | write_domain == I915_GEM_DOMAIN_GTT ? |
||
1417 | ORIGIN_GTT : ORIGIN_CPU); |
||
1418 | |||
3260 | Serge | 1419 | unref: |
1420 | drm_gem_object_unreference(&obj->base); |
||
1421 | unlock: |
||
1422 | mutex_unlock(&dev->struct_mutex); |
||
1423 | return ret; |
||
1424 | } |
||
2332 | Serge | 1425 | |
4293 | Serge | 1426 | /** |
1427 | * Called when user space has done writes to this buffer |
||
1428 | */ |
||
1429 | int |
||
1430 | i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, |
||
1431 | struct drm_file *file) |
||
1432 | { |
||
1433 | struct drm_i915_gem_sw_finish *args = data; |
||
1434 | struct drm_i915_gem_object *obj; |
||
1435 | int ret = 0; |
||
2332 | Serge | 1436 | |
4293 | Serge | 1437 | ret = i915_mutex_lock_interruptible(dev); |
1438 | if (ret) |
||
1439 | return ret; |
||
2332 | Serge | 1440 | |
4293 | Serge | 1441 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
1442 | if (&obj->base == NULL) { |
||
1443 | ret = -ENOENT; |
||
1444 | goto unlock; |
||
1445 | } |
||
2332 | Serge | 1446 | |
4293 | Serge | 1447 | /* Pinned buffers may be scanout, so flush the cache */ |
1448 | if (obj->pin_display) |
||
6084 | serge | 1449 | i915_gem_object_flush_cpu_write_domain(obj); |
2332 | Serge | 1450 | |
4293 | Serge | 1451 | drm_gem_object_unreference(&obj->base); |
1452 | unlock: |
||
1453 | mutex_unlock(&dev->struct_mutex); |
||
1454 | return ret; |
||
1455 | } |
||
1456 | |||
3260 | Serge | 1457 | /** |
1458 | * Maps the contents of an object, returning the address it is mapped |
||
1459 | * into. |
||
1460 | * |
||
1461 | * While the mapping holds a reference on the contents of the object, it doesn't |
||
1462 | * imply a ref on the object itself. |
||
5354 | serge | 1463 | * |
1464 | * IMPORTANT: |
||
1465 | * |
||
1466 | * DRM driver writers who look a this function as an example for how to do GEM |
||
1467 | * mmap support, please don't implement mmap support like here. The modern way |
||
1468 | * to implement DRM mmap support is with an mmap offset ioctl (like |
||
1469 | * i915_gem_mmap_gtt) and then using the mmap syscall on the DRM fd directly. |
||
1470 | * That way debug tooling like valgrind will understand what's going on, hiding |
||
1471 | * the mmap call in a driver private ioctl will break that. The i915 driver only |
||
1472 | * does cpu mmaps this way because we didn't know better. |
||
3260 | Serge | 1473 | */ |
1474 | int |
||
1475 | i915_gem_mmap_ioctl(struct drm_device *dev, void *data, |
||
1476 | struct drm_file *file) |
||
1477 | { |
||
1478 | struct drm_i915_gem_mmap *args = data; |
||
1479 | struct drm_gem_object *obj; |
||
4392 | Serge | 1480 | unsigned long addr; |
2332 | Serge | 1481 | |
6084 | serge | 1482 | // if (args->flags & ~(I915_MMAP_WC)) |
1483 | // return -EINVAL; |
||
3260 | Serge | 1484 | obj = drm_gem_object_lookup(dev, file, args->handle); |
1485 | if (obj == NULL) |
||
1486 | return -ENOENT; |
||
4104 | Serge | 1487 | |
3260 | Serge | 1488 | /* prime objects have no backing filp to GEM mmap |
1489 | * pages from. |
||
1490 | */ |
||
1491 | if (!obj->filp) { |
||
1492 | drm_gem_object_unreference_unlocked(obj); |
||
1493 | return -EINVAL; |
||
1494 | } |
||
2332 | Serge | 1495 | |
6084 | serge | 1496 | addr = vm_mmap(obj->filp, 0, args->size, |
1497 | PROT_READ | PROT_WRITE, MAP_SHARED, |
||
1498 | args->offset); |
||
3260 | Serge | 1499 | drm_gem_object_unreference_unlocked(obj); |
6084 | serge | 1500 | if (IS_ERR((void *)addr)) |
1501 | return addr; |
||
2332 | Serge | 1502 | |
3260 | Serge | 1503 | args->addr_ptr = (uint64_t) addr; |
2332 | Serge | 1504 | |
6084 | serge | 1505 | return 0; |
3260 | Serge | 1506 | } |
2332 | Serge | 1507 | |
1508 | |||
1509 | |||
1510 | |||
1511 | |||
1512 | |||
1513 | |||
1514 | |||
3031 | serge | 1515 | |
1516 | |||
1517 | |||
1518 | |||
1519 | |||
1520 | /** |
||
1521 | * i915_gem_release_mmap - remove physical page mappings |
||
1522 | * @obj: obj in question |
||
1523 | * |
||
1524 | * Preserve the reservation of the mmapping with the DRM core code, but |
||
1525 | * relinquish ownership of the pages back to the system. |
||
1526 | * |
||
1527 | * It is vital that we remove the page mapping if we have mapped a tiled |
||
1528 | * object through the GTT and then lose the fence register due to |
||
1529 | * resource pressure. Similarly if the object has been moved out of the |
||
1530 | * aperture, than pages mapped into userspace must be revoked. Removing the |
||
1531 | * mapping will then trigger a page fault on the next user access, allowing |
||
1532 | * fixup by i915_gem_fault(). |
||
1533 | */ |
||
1534 | void |
||
1535 | i915_gem_release_mmap(struct drm_i915_gem_object *obj) |
||
1536 | { |
||
1537 | if (!obj->fault_mappable) |
||
1538 | return; |
||
1539 | |||
4104 | Serge | 1540 | // drm_vma_node_unmap(&obj->base.vma_node, obj->base.dev->dev_mapping); |
3031 | serge | 1541 | obj->fault_mappable = false; |
1542 | } |
||
1543 | |||
6084 | serge | 1544 | void |
1545 | i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv) |
||
1546 | { |
||
1547 | struct drm_i915_gem_object *obj; |
||
1548 | |||
1549 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) |
||
1550 | i915_gem_release_mmap(obj); |
||
1551 | } |
||
1552 | |||
3480 | Serge | 1553 | uint32_t |
2332 | Serge | 1554 | i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode) |
1555 | { |
||
1556 | uint32_t gtt_size; |
||
1557 | |||
1558 | if (INTEL_INFO(dev)->gen >= 4 || |
||
1559 | tiling_mode == I915_TILING_NONE) |
||
1560 | return size; |
||
1561 | |||
1562 | /* Previous chips need a power-of-two fence region when tiling */ |
||
1563 | if (INTEL_INFO(dev)->gen == 3) |
||
1564 | gtt_size = 1024*1024; |
||
1565 | else |
||
1566 | gtt_size = 512*1024; |
||
1567 | |||
1568 | while (gtt_size < size) |
||
1569 | gtt_size <<= 1; |
||
1570 | |||
1571 | return gtt_size; |
||
1572 | } |
||
1573 | |||
1574 | /** |
||
1575 | * i915_gem_get_gtt_alignment - return required GTT alignment for an object |
||
1576 | * @obj: object to check |
||
1577 | * |
||
1578 | * Return the required GTT alignment for an object, taking into account |
||
1579 | * potential fence register mapping. |
||
1580 | */ |
||
3480 | Serge | 1581 | uint32_t |
1582 | i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size, |
||
1583 | int tiling_mode, bool fenced) |
||
2332 | Serge | 1584 | { |
1585 | /* |
||
1586 | * Minimum alignment is 4k (GTT page size), but might be greater |
||
1587 | * if a fence register is needed for the object. |
||
1588 | */ |
||
3480 | Serge | 1589 | if (INTEL_INFO(dev)->gen >= 4 || (!fenced && IS_G33(dev)) || |
2332 | Serge | 1590 | tiling_mode == I915_TILING_NONE) |
1591 | return 4096; |
||
1592 | |||
1593 | /* |
||
1594 | * Previous chips need to be aligned to the size of the smallest |
||
1595 | * fence register that can contain the object. |
||
1596 | */ |
||
1597 | return i915_gem_get_gtt_size(dev, size, tiling_mode); |
||
1598 | } |
||
1599 | |||
1600 | |||
1601 | |||
3480 | Serge | 1602 | int |
1603 | i915_gem_mmap_gtt(struct drm_file *file, |
||
1604 | struct drm_device *dev, |
||
6084 | serge | 1605 | uint32_t handle, |
3480 | Serge | 1606 | uint64_t *offset) |
1607 | { |
||
1608 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
1609 | struct drm_i915_gem_object *obj; |
||
1610 | unsigned long pfn; |
||
1611 | char *mem, *ptr; |
||
1612 | int ret; |
||
1613 | |||
1614 | ret = i915_mutex_lock_interruptible(dev); |
||
1615 | if (ret) |
||
1616 | return ret; |
||
1617 | |||
1618 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle)); |
||
1619 | if (&obj->base == NULL) { |
||
1620 | ret = -ENOENT; |
||
1621 | goto unlock; |
||
1622 | } |
||
1623 | |||
1624 | if (obj->madv != I915_MADV_WILLNEED) { |
||
5060 | serge | 1625 | DRM_DEBUG("Attempting to mmap a purgeable buffer\n"); |
1626 | ret = -EFAULT; |
||
3480 | Serge | 1627 | goto out; |
1628 | } |
||
1629 | /* Now bind it into the GTT if needed */ |
||
5060 | serge | 1630 | ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE | PIN_NONBLOCK); |
3480 | Serge | 1631 | if (ret) |
1632 | goto out; |
||
1633 | |||
1634 | ret = i915_gem_object_set_to_gtt_domain(obj, 1); |
||
1635 | if (ret) |
||
1636 | goto unpin; |
||
1637 | |||
1638 | ret = i915_gem_object_get_fence(obj); |
||
1639 | if (ret) |
||
1640 | goto unpin; |
||
1641 | |||
1642 | obj->fault_mappable = true; |
||
1643 | |||
4104 | Serge | 1644 | pfn = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj); |
3480 | Serge | 1645 | |
1646 | /* Finally, remap it using the new GTT offset */ |
||
1647 | |||
1648 | mem = UserAlloc(obj->base.size); |
||
1649 | if(unlikely(mem == NULL)) |
||
1650 | { |
||
1651 | ret = -ENOMEM; |
||
1652 | goto unpin; |
||
1653 | } |
||
1654 | |||
1655 | for(ptr = mem; ptr < mem + obj->base.size; ptr+= 4096, pfn+= 4096) |
||
1656 | MapPage(ptr, pfn, PG_SHARED|PG_UW); |
||
1657 | |||
1658 | unpin: |
||
5060 | serge | 1659 | i915_gem_object_unpin_pages(obj); |
3480 | Serge | 1660 | |
1661 | |||
5367 | serge | 1662 | *offset = (uint32_t)mem; |
3480 | Serge | 1663 | |
1664 | out: |
||
6088 | serge | 1665 | drm_gem_object_unreference(&obj->base); |
3480 | Serge | 1666 | unlock: |
6088 | serge | 1667 | mutex_unlock(&dev->struct_mutex); |
1668 | return ret; |
||
3480 | Serge | 1669 | } |
1670 | |||
1671 | /** |
||
1672 | * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing |
||
1673 | * @dev: DRM device |
||
1674 | * @data: GTT mapping ioctl data |
||
1675 | * @file: GEM object info |
||
1676 | * |
||
1677 | * Simply returns the fake offset to userspace so it can mmap it. |
||
1678 | * The mmap call will end up in drm_gem_mmap(), which will set things |
||
1679 | * up so we can get faults in the handler above. |
||
1680 | * |
||
1681 | * The fault handler will take care of binding the object into the GTT |
||
1682 | * (since it may have been evicted to make room for something), allocating |
||
1683 | * a fence register, and mapping the appropriate aperture address into |
||
1684 | * userspace. |
||
1685 | */ |
||
1686 | int |
||
1687 | i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, |
||
6084 | serge | 1688 | struct drm_file *file) |
3480 | Serge | 1689 | { |
6084 | serge | 1690 | struct drm_i915_gem_mmap_gtt *args = data; |
3480 | Serge | 1691 | |
6084 | serge | 1692 | return i915_gem_mmap_gtt(file, dev, args->handle, &args->offset); |
3480 | Serge | 1693 | } |
1694 | |||
3031 | serge | 1695 | /* Immediately discard the backing storage */ |
1696 | static void |
||
1697 | i915_gem_object_truncate(struct drm_i915_gem_object *obj) |
||
1698 | { |
||
1699 | // i915_gem_object_free_mmap_offset(obj); |
||
2332 | Serge | 1700 | |
3263 | Serge | 1701 | if (obj->base.filp == NULL) |
1702 | return; |
||
2332 | Serge | 1703 | |
3031 | serge | 1704 | /* Our goal here is to return as much of the memory as |
1705 | * is possible back to the system as we are called from OOM. |
||
1706 | * To do this we must instruct the shmfs to drop all of its |
||
1707 | * backing pages, *now*. |
||
1708 | */ |
||
5060 | serge | 1709 | // shmem_truncate_range(file_inode(obj->base.filp), 0, (loff_t)-1); |
3031 | serge | 1710 | obj->madv = __I915_MADV_PURGED; |
1711 | } |
||
2332 | Serge | 1712 | |
5060 | serge | 1713 | /* Try to discard unwanted pages */ |
1714 | static void |
||
1715 | i915_gem_object_invalidate(struct drm_i915_gem_object *obj) |
||
3031 | serge | 1716 | { |
5060 | serge | 1717 | struct address_space *mapping; |
1718 | |||
1719 | switch (obj->madv) { |
||
1720 | case I915_MADV_DONTNEED: |
||
1721 | i915_gem_object_truncate(obj); |
||
1722 | case __I915_MADV_PURGED: |
||
1723 | return; |
||
1724 | } |
||
1725 | |||
1726 | if (obj->base.filp == NULL) |
||
1727 | return; |
||
1728 | |||
3031 | serge | 1729 | } |
2332 | Serge | 1730 | |
3031 | serge | 1731 | static void |
1732 | i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj) |
||
1733 | { |
||
3746 | Serge | 1734 | struct sg_page_iter sg_iter; |
1735 | int ret; |
||
2332 | Serge | 1736 | |
3031 | serge | 1737 | BUG_ON(obj->madv == __I915_MADV_PURGED); |
2332 | Serge | 1738 | |
3031 | serge | 1739 | ret = i915_gem_object_set_to_cpu_domain(obj, true); |
1740 | if (ret) { |
||
1741 | /* In the event of a disaster, abandon all caches and |
||
1742 | * hope for the best. |
||
1743 | */ |
||
1744 | WARN_ON(ret != -EIO); |
||
4104 | Serge | 1745 | i915_gem_clflush_object(obj, true); |
3031 | serge | 1746 | obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
1747 | } |
||
2332 | Serge | 1748 | |
6084 | serge | 1749 | i915_gem_gtt_finish_object(obj); |
3031 | serge | 1750 | if (obj->madv == I915_MADV_DONTNEED) |
1751 | obj->dirty = 0; |
||
2332 | Serge | 1752 | |
3746 | Serge | 1753 | for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0) { |
1754 | struct page *page = sg_page_iter_page(&sg_iter); |
||
2332 | Serge | 1755 | |
6084 | serge | 1756 | page_cache_release(page); |
3243 | Serge | 1757 | } |
6084 | serge | 1758 | obj->dirty = 0; |
3243 | Serge | 1759 | |
1760 | sg_free_table(obj->pages); |
||
1761 | kfree(obj->pages); |
||
3031 | serge | 1762 | } |
2332 | Serge | 1763 | |
3480 | Serge | 1764 | int |
3031 | serge | 1765 | i915_gem_object_put_pages(struct drm_i915_gem_object *obj) |
1766 | { |
||
1767 | const struct drm_i915_gem_object_ops *ops = obj->ops; |
||
2332 | Serge | 1768 | |
3243 | Serge | 1769 | if (obj->pages == NULL) |
3031 | serge | 1770 | return 0; |
2332 | Serge | 1771 | |
3031 | serge | 1772 | if (obj->pages_pin_count) |
1773 | return -EBUSY; |
||
1774 | |||
4104 | Serge | 1775 | BUG_ON(i915_gem_obj_bound_any(obj)); |
1776 | |||
3243 | Serge | 1777 | /* ->put_pages might need to allocate memory for the bit17 swizzle |
1778 | * array, hence protect them from being reaped by removing them from gtt |
||
1779 | * lists early. */ |
||
4104 | Serge | 1780 | list_del(&obj->global_list); |
3243 | Serge | 1781 | |
3031 | serge | 1782 | ops->put_pages(obj); |
3243 | Serge | 1783 | obj->pages = NULL; |
3031 | serge | 1784 | |
5060 | serge | 1785 | i915_gem_object_invalidate(obj); |
3031 | serge | 1786 | |
1787 | return 0; |
||
1788 | } |
||
1789 | |||
2332 | Serge | 1790 | static int |
3031 | serge | 1791 | i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) |
2332 | Serge | 1792 | { |
3260 | Serge | 1793 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
6084 | serge | 1794 | int page_count, i; |
1795 | struct address_space *mapping; |
||
1796 | struct sg_table *st; |
||
3243 | Serge | 1797 | struct scatterlist *sg; |
3746 | Serge | 1798 | struct sg_page_iter sg_iter; |
3243 | Serge | 1799 | struct page *page; |
3746 | Serge | 1800 | unsigned long last_pfn = 0; /* suppress gcc warning */ |
6084 | serge | 1801 | int ret; |
3243 | Serge | 1802 | gfp_t gfp; |
2332 | Serge | 1803 | |
3243 | Serge | 1804 | /* Assert that the object is not currently in any GPU domain. As it |
1805 | * wasn't in the GTT, there shouldn't be any way it could have been in |
||
1806 | * a GPU cache |
||
2332 | Serge | 1807 | */ |
3243 | Serge | 1808 | BUG_ON(obj->base.read_domains & I915_GEM_GPU_DOMAINS); |
1809 | BUG_ON(obj->base.write_domain & I915_GEM_GPU_DOMAINS); |
||
1810 | |||
1811 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
||
1812 | if (st == NULL) |
||
1813 | return -ENOMEM; |
||
1814 | |||
2332 | Serge | 1815 | page_count = obj->base.size / PAGE_SIZE; |
3243 | Serge | 1816 | if (sg_alloc_table(st, page_count, GFP_KERNEL)) { |
1817 | kfree(st); |
||
2332 | Serge | 1818 | return -ENOMEM; |
3243 | Serge | 1819 | } |
2332 | Serge | 1820 | |
3243 | Serge | 1821 | /* Get the list of pages out of our struct file. They'll be pinned |
1822 | * at this point until we release them. |
||
1823 | * |
||
1824 | * Fail silently without starting the shrinker |
||
1825 | */ |
||
3746 | Serge | 1826 | sg = st->sgl; |
1827 | st->nents = 0; |
||
1828 | for (i = 0; i < page_count; i++) { |
||
4104 | Serge | 1829 | page = shmem_read_mapping_page_gfp(obj->base.filp, i, gfp); |
3260 | Serge | 1830 | if (IS_ERR(page)) { |
1831 | dbgprintf("%s invalid page %p\n", __FUNCTION__, page); |
||
2332 | Serge | 1832 | goto err_pages; |
3260 | Serge | 1833 | } |
5354 | serge | 1834 | #ifdef CONFIG_SWIOTLB |
1835 | if (swiotlb_nr_tbl()) { |
||
1836 | st->nents++; |
||
1837 | sg_set_page(sg, page, PAGE_SIZE, 0); |
||
1838 | sg = sg_next(sg); |
||
1839 | continue; |
||
1840 | } |
||
1841 | #endif |
||
3746 | Serge | 1842 | if (!i || page_to_pfn(page) != last_pfn + 1) { |
1843 | if (i) |
||
1844 | sg = sg_next(sg); |
||
1845 | st->nents++; |
||
6084 | serge | 1846 | sg_set_page(sg, page, PAGE_SIZE, 0); |
3746 | Serge | 1847 | } else { |
1848 | sg->length += PAGE_SIZE; |
||
1849 | } |
||
1850 | last_pfn = page_to_pfn(page); |
||
3243 | Serge | 1851 | } |
5354 | serge | 1852 | #ifdef CONFIG_SWIOTLB |
1853 | if (!swiotlb_nr_tbl()) |
||
1854 | #endif |
||
3746 | Serge | 1855 | sg_mark_end(sg); |
3243 | Serge | 1856 | obj->pages = st; |
3031 | serge | 1857 | |
6084 | serge | 1858 | ret = i915_gem_gtt_prepare_object(obj); |
1859 | if (ret) |
||
1860 | goto err_pages; |
||
5367 | serge | 1861 | |
1862 | if (obj->tiling_mode != I915_TILING_NONE && |
||
1863 | dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) |
||
1864 | i915_gem_object_pin_pages(obj); |
||
1865 | |||
2332 | Serge | 1866 | return 0; |
1867 | |||
1868 | err_pages: |
||
3746 | Serge | 1869 | sg_mark_end(sg); |
1870 | for_each_sg_page(st->sgl, &sg_iter, st->nents, 0) |
||
1871 | page_cache_release(sg_page_iter_page(&sg_iter)); |
||
3243 | Serge | 1872 | sg_free_table(st); |
1873 | kfree(st); |
||
6084 | serge | 1874 | |
3243 | Serge | 1875 | return PTR_ERR(page); |
2332 | Serge | 1876 | } |
1877 | |||
3031 | serge | 1878 | /* Ensure that the associated pages are gathered from the backing storage |
1879 | * and pinned into our object. i915_gem_object_get_pages() may be called |
||
1880 | * multiple times before they are released by a single call to |
||
1881 | * i915_gem_object_put_pages() - once the pages are no longer referenced |
||
1882 | * either as a result of memory pressure (reaping pages under the shrinker) |
||
1883 | * or as the object is itself released. |
||
1884 | */ |
||
1885 | int |
||
1886 | i915_gem_object_get_pages(struct drm_i915_gem_object *obj) |
||
2332 | Serge | 1887 | { |
3031 | serge | 1888 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
1889 | const struct drm_i915_gem_object_ops *ops = obj->ops; |
||
1890 | int ret; |
||
2332 | Serge | 1891 | |
3243 | Serge | 1892 | if (obj->pages) |
3031 | serge | 1893 | return 0; |
2332 | Serge | 1894 | |
4392 | Serge | 1895 | if (obj->madv != I915_MADV_WILLNEED) { |
5060 | serge | 1896 | DRM_DEBUG("Attempting to obtain a purgeable object\n"); |
1897 | return -EFAULT; |
||
4392 | Serge | 1898 | } |
1899 | |||
3031 | serge | 1900 | BUG_ON(obj->pages_pin_count); |
2332 | Serge | 1901 | |
3031 | serge | 1902 | ret = ops->get_pages(obj); |
1903 | if (ret) |
||
1904 | return ret; |
||
2344 | Serge | 1905 | |
4104 | Serge | 1906 | list_add_tail(&obj->global_list, &dev_priv->mm.unbound_list); |
6084 | serge | 1907 | |
1908 | obj->get_page.sg = obj->pages->sgl; |
||
1909 | obj->get_page.last = 0; |
||
1910 | |||
1911 | return 0; |
||
2332 | Serge | 1912 | } |
1913 | |||
6084 | serge | 1914 | void i915_vma_move_to_active(struct i915_vma *vma, |
1915 | struct drm_i915_gem_request *req) |
||
2332 | Serge | 1916 | { |
6084 | serge | 1917 | struct drm_i915_gem_object *obj = vma->obj; |
1918 | struct intel_engine_cs *ring; |
||
2332 | Serge | 1919 | |
6084 | serge | 1920 | ring = i915_gem_request_get_ring(req); |
2332 | Serge | 1921 | |
1922 | /* Add a reference if we're newly entering the active list. */ |
||
6084 | serge | 1923 | if (obj->active == 0) |
2344 | Serge | 1924 | drm_gem_object_reference(&obj->base); |
6084 | serge | 1925 | obj->active |= intel_ring_flag(ring); |
2332 | Serge | 1926 | |
6084 | serge | 1927 | list_move_tail(&obj->ring_list[ring->id], &ring->active_list); |
1928 | i915_gem_request_assign(&obj->last_read_req[ring->id], req); |
||
2332 | Serge | 1929 | |
6084 | serge | 1930 | list_move_tail(&vma->mm_list, &vma->vm->active_list); |
2332 | Serge | 1931 | } |
1932 | |||
6084 | serge | 1933 | static void |
1934 | i915_gem_object_retire__write(struct drm_i915_gem_object *obj) |
||
4560 | Serge | 1935 | { |
6084 | serge | 1936 | RQ_BUG_ON(obj->last_write_req == NULL); |
1937 | RQ_BUG_ON(!(obj->active & intel_ring_flag(obj->last_write_req->ring))); |
||
1938 | |||
1939 | i915_gem_request_assign(&obj->last_write_req, NULL); |
||
1940 | intel_fb_obj_flush(obj, true, ORIGIN_CS); |
||
4560 | Serge | 1941 | } |
1942 | |||
2344 | Serge | 1943 | static void |
6084 | serge | 1944 | i915_gem_object_retire__read(struct drm_i915_gem_object *obj, int ring) |
2344 | Serge | 1945 | { |
5060 | serge | 1946 | struct i915_vma *vma; |
2332 | Serge | 1947 | |
6084 | serge | 1948 | RQ_BUG_ON(obj->last_read_req[ring] == NULL); |
1949 | RQ_BUG_ON(!(obj->active & (1 << ring))); |
||
2332 | Serge | 1950 | |
6084 | serge | 1951 | list_del_init(&obj->ring_list[ring]); |
1952 | i915_gem_request_assign(&obj->last_read_req[ring], NULL); |
||
2344 | Serge | 1953 | |
6084 | serge | 1954 | if (obj->last_write_req && obj->last_write_req->ring->id == ring) |
1955 | i915_gem_object_retire__write(obj); |
||
5354 | serge | 1956 | |
6084 | serge | 1957 | obj->active &= ~(1 << ring); |
1958 | if (obj->active) |
||
1959 | return; |
||
2344 | Serge | 1960 | |
6084 | serge | 1961 | /* Bump our place on the bound list to keep it roughly in LRU order |
1962 | * so that we don't steal from recently used but inactive objects |
||
1963 | * (unless we are forced to ofc!) |
||
1964 | */ |
||
1965 | list_move_tail(&obj->global_list, |
||
1966 | &to_i915(obj->base.dev)->mm.bound_list); |
||
3031 | serge | 1967 | |
6084 | serge | 1968 | list_for_each_entry(vma, &obj->vma_list, vma_link) { |
1969 | if (!list_empty(&vma->mm_list)) |
||
1970 | list_move_tail(&vma->mm_list, &vma->vm->inactive_list); |
||
1971 | } |
||
2344 | Serge | 1972 | |
6084 | serge | 1973 | i915_gem_request_assign(&obj->last_fenced_req, NULL); |
2352 | Serge | 1974 | drm_gem_object_unreference(&obj->base); |
1975 | } |
||
1976 | |||
3243 | Serge | 1977 | static int |
3480 | Serge | 1978 | i915_gem_init_seqno(struct drm_device *dev, u32 seqno) |
2344 | Serge | 1979 | { |
3243 | Serge | 1980 | struct drm_i915_private *dev_priv = dev->dev_private; |
5060 | serge | 1981 | struct intel_engine_cs *ring; |
3243 | Serge | 1982 | int ret, i, j; |
2344 | Serge | 1983 | |
3480 | Serge | 1984 | /* Carefully retire all requests without writing to the rings */ |
3243 | Serge | 1985 | for_each_ring(ring, dev_priv, i) { |
3480 | Serge | 1986 | ret = intel_ring_idle(ring); |
6084 | serge | 1987 | if (ret) |
1988 | return ret; |
||
3480 | Serge | 1989 | } |
1990 | i915_gem_retire_requests(dev); |
||
3243 | Serge | 1991 | |
3480 | Serge | 1992 | /* Finally reset hw state */ |
3243 | Serge | 1993 | for_each_ring(ring, dev_priv, i) { |
3480 | Serge | 1994 | intel_ring_init_seqno(ring, seqno); |
1995 | |||
5060 | serge | 1996 | for (j = 0; j < ARRAY_SIZE(ring->semaphore.sync_seqno); j++) |
1997 | ring->semaphore.sync_seqno[j] = 0; |
||
3243 | Serge | 1998 | } |
1999 | |||
2000 | return 0; |
||
2344 | Serge | 2001 | } |
2002 | |||
3480 | Serge | 2003 | int i915_gem_set_seqno(struct drm_device *dev, u32 seqno) |
2004 | { |
||
2005 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
2006 | int ret; |
||
2007 | |||
2008 | if (seqno == 0) |
||
2009 | return -EINVAL; |
||
2010 | |||
2011 | /* HWS page needs to be set less than what we |
||
2012 | * will inject to ring |
||
2013 | */ |
||
2014 | ret = i915_gem_init_seqno(dev, seqno - 1); |
||
2015 | if (ret) |
||
2016 | return ret; |
||
2017 | |||
2018 | /* Carefully set the last_seqno value so that wrap |
||
2019 | * detection still works |
||
2020 | */ |
||
2021 | dev_priv->next_seqno = seqno; |
||
2022 | dev_priv->last_seqno = seqno - 1; |
||
2023 | if (dev_priv->last_seqno == 0) |
||
2024 | dev_priv->last_seqno--; |
||
2025 | |||
2026 | return 0; |
||
2027 | } |
||
2028 | |||
3243 | Serge | 2029 | int |
2030 | i915_gem_get_seqno(struct drm_device *dev, u32 *seqno) |
||
2344 | Serge | 2031 | { |
3243 | Serge | 2032 | struct drm_i915_private *dev_priv = dev->dev_private; |
2344 | Serge | 2033 | |
3243 | Serge | 2034 | /* reserve 0 for non-seqno */ |
2035 | if (dev_priv->next_seqno == 0) { |
||
3480 | Serge | 2036 | int ret = i915_gem_init_seqno(dev, 0); |
3243 | Serge | 2037 | if (ret) |
2038 | return ret; |
||
2039 | |||
2040 | dev_priv->next_seqno = 1; |
||
2041 | } |
||
2042 | |||
3480 | Serge | 2043 | *seqno = dev_priv->last_seqno = dev_priv->next_seqno++; |
3243 | Serge | 2044 | return 0; |
2332 | Serge | 2045 | } |
2046 | |||
6084 | serge | 2047 | /* |
2048 | * NB: This function is not allowed to fail. Doing so would mean the the |
||
2049 | * request is not being tracked for completion but the work itself is |
||
2050 | * going to happen on the hardware. This would be a Bad Thing(tm). |
||
2051 | */ |
||
2052 | void __i915_add_request(struct drm_i915_gem_request *request, |
||
2053 | struct drm_i915_gem_object *obj, |
||
2054 | bool flush_caches) |
||
2352 | Serge | 2055 | { |
6084 | serge | 2056 | struct intel_engine_cs *ring; |
2057 | struct drm_i915_private *dev_priv; |
||
5354 | serge | 2058 | struct intel_ringbuffer *ringbuf; |
6084 | serge | 2059 | u32 request_start; |
2352 | Serge | 2060 | int ret; |
2332 | Serge | 2061 | |
5354 | serge | 2062 | if (WARN_ON(request == NULL)) |
6084 | serge | 2063 | return; |
5354 | serge | 2064 | |
6084 | serge | 2065 | ring = request->ring; |
2066 | dev_priv = ring->dev->dev_private; |
||
2067 | ringbuf = request->ringbuf; |
||
5354 | serge | 2068 | |
6084 | serge | 2069 | /* |
2070 | * To ensure that this call will not fail, space for its emissions |
||
2071 | * should already have been reserved in the ring buffer. Let the ring |
||
2072 | * know that it is time to use that space up. |
||
2073 | */ |
||
2074 | intel_ring_reserved_space_use(ringbuf); |
||
2075 | |||
5354 | serge | 2076 | request_start = intel_ring_get_tail(ringbuf); |
3031 | serge | 2077 | /* |
2078 | * Emit any outstanding flushes - execbuf can fail to emit the flush |
||
2079 | * after having emitted the batchbuffer command. Hence we need to fix |
||
2080 | * things up similar to emitting the lazy request. The difference here |
||
2081 | * is that the flush _must_ happen before the next request, no matter |
||
2082 | * what. |
||
2083 | */ |
||
6084 | serge | 2084 | if (flush_caches) { |
2085 | if (i915.enable_execlists) |
||
2086 | ret = logical_ring_flush_all_caches(request); |
||
2087 | else |
||
2088 | ret = intel_ring_flush_all_caches(request); |
||
2089 | /* Not allowed to fail! */ |
||
2090 | WARN(ret, "*_ring_flush_all_caches failed: %d!\n", ret); |
||
5354 | serge | 2091 | } |
2332 | Serge | 2092 | |
3031 | serge | 2093 | /* Record the position of the start of the request so that |
2094 | * should we detect the updated seqno part-way through the |
||
6084 | serge | 2095 | * GPU processing the request, we never over-estimate the |
3031 | serge | 2096 | * position of the head. |
2097 | */ |
||
6084 | serge | 2098 | request->postfix = intel_ring_get_tail(ringbuf); |
3031 | serge | 2099 | |
6084 | serge | 2100 | if (i915.enable_execlists) |
2101 | ret = ring->emit_request(request); |
||
2102 | else { |
||
2103 | ret = ring->add_request(request); |
||
2104 | |||
2105 | request->tail = intel_ring_get_tail(ringbuf); |
||
5354 | serge | 2106 | } |
6084 | serge | 2107 | /* Not allowed to fail! */ |
2108 | WARN(ret, "emit|add_request failed: %d!\n", ret); |
||
2332 | Serge | 2109 | |
4104 | Serge | 2110 | request->head = request_start; |
2111 | |||
2112 | /* Whilst this request exists, batch_obj will be on the |
||
2113 | * active_list, and so will hold the active reference. Only when this |
||
2114 | * request is retired will the the batch_obj be moved onto the |
||
2115 | * inactive_list and lose its active reference. Hence we do not need |
||
2116 | * to explicitly hold another reference here. |
||
2117 | */ |
||
4560 | Serge | 2118 | request->batch_obj = obj; |
4104 | Serge | 2119 | |
5060 | serge | 2120 | request->emitted_jiffies = jiffies; |
6084 | serge | 2121 | request->previous_seqno = ring->last_submitted_seqno; |
2122 | ring->last_submitted_seqno = request->seqno; |
||
2352 | Serge | 2123 | list_add_tail(&request->list, &ring->request_list); |
2332 | Serge | 2124 | |
6084 | serge | 2125 | trace_i915_gem_request_add(request); |
2332 | Serge | 2126 | |
6084 | serge | 2127 | // i915_queue_hangcheck(ring->dev); |
3263 | Serge | 2128 | |
6084 | serge | 2129 | queue_delayed_work(dev_priv->wq, |
2130 | &dev_priv->mm.retire_work, |
||
2131 | round_jiffies_up_relative(HZ)); |
||
2132 | intel_mark_busy(dev_priv->dev); |
||
2332 | Serge | 2133 | |
6084 | serge | 2134 | /* Sanity check that the reserved size was large enough. */ |
2135 | intel_ring_reserved_space_end(ringbuf); |
||
2352 | Serge | 2136 | } |
2332 | Serge | 2137 | |
5060 | serge | 2138 | static bool i915_context_is_banned(struct drm_i915_private *dev_priv, |
2139 | const struct intel_context *ctx) |
||
4104 | Serge | 2140 | { |
5060 | serge | 2141 | unsigned long elapsed; |
4104 | Serge | 2142 | |
5060 | serge | 2143 | elapsed = GetTimerTicks()/100 - ctx->hang_stats.guilty_ts; |
4104 | Serge | 2144 | |
5060 | serge | 2145 | if (ctx->hang_stats.banned) |
2146 | return true; |
||
4104 | Serge | 2147 | |
6084 | serge | 2148 | if (ctx->hang_stats.ban_period_seconds && |
2149 | elapsed <= ctx->hang_stats.ban_period_seconds) { |
||
5060 | serge | 2150 | if (!i915_gem_context_is_default(ctx)) { |
2151 | DRM_DEBUG("context hanging too fast, banning!\n"); |
||
4104 | Serge | 2152 | return true; |
5060 | serge | 2153 | } else if (i915_stop_ring_allow_ban(dev_priv)) { |
2154 | if (i915_stop_ring_allow_warn(dev_priv)) |
||
6084 | serge | 2155 | DRM_ERROR("gpu hanging too fast, banning!\n"); |
4104 | Serge | 2156 | return true; |
6084 | serge | 2157 | } |
4104 | Serge | 2158 | } |
2159 | |||
2160 | return false; |
||
2161 | } |
||
2162 | |||
5060 | serge | 2163 | static void i915_set_reset_status(struct drm_i915_private *dev_priv, |
2164 | struct intel_context *ctx, |
||
2165 | const bool guilty) |
||
4560 | Serge | 2166 | { |
5060 | serge | 2167 | struct i915_ctx_hang_stats *hs; |
4560 | Serge | 2168 | |
5060 | serge | 2169 | if (WARN_ON(!ctx)) |
2170 | return; |
||
4560 | Serge | 2171 | |
5060 | serge | 2172 | hs = &ctx->hang_stats; |
4560 | Serge | 2173 | |
5060 | serge | 2174 | if (guilty) { |
2175 | hs->banned = i915_context_is_banned(dev_priv, ctx); |
||
2176 | hs->batch_active++; |
||
2177 | hs->guilty_ts = GetTimerTicks()/100; |
||
2178 | } else { |
||
2179 | hs->batch_pending++; |
||
4104 | Serge | 2180 | } |
2181 | } |
||
2182 | |||
6084 | serge | 2183 | void i915_gem_request_free(struct kref *req_ref) |
4104 | Serge | 2184 | { |
6084 | serge | 2185 | struct drm_i915_gem_request *req = container_of(req_ref, |
2186 | typeof(*req), ref); |
||
2187 | struct intel_context *ctx = req->ctx; |
||
5354 | serge | 2188 | |
6084 | serge | 2189 | if (req->file_priv) |
2190 | i915_gem_request_remove_from_client(req); |
||
4104 | Serge | 2191 | |
5354 | serge | 2192 | if (ctx) { |
2193 | if (i915.enable_execlists) { |
||
6084 | serge | 2194 | if (ctx != req->ring->default_context) |
2195 | intel_lr_context_unpin(req); |
||
2196 | } |
||
4104 | Serge | 2197 | |
5354 | serge | 2198 | i915_gem_context_unreference(ctx); |
2199 | } |
||
6084 | serge | 2200 | |
2201 | kfree(req); |
||
4104 | Serge | 2202 | } |
2203 | |||
6084 | serge | 2204 | int i915_gem_request_alloc(struct intel_engine_cs *ring, |
2205 | struct intel_context *ctx, |
||
2206 | struct drm_i915_gem_request **req_out) |
||
2207 | { |
||
2208 | struct drm_i915_private *dev_priv = to_i915(ring->dev); |
||
2209 | struct drm_i915_gem_request *req; |
||
2210 | int ret; |
||
2211 | |||
2212 | if (!req_out) |
||
2213 | return -EINVAL; |
||
2214 | |||
2215 | *req_out = NULL; |
||
2216 | |||
2217 | // req = kmem_cache_zalloc(dev_priv->requests, GFP_KERNEL); |
||
2218 | req = kzalloc(sizeof(*req),0); |
||
2219 | if (req == NULL) |
||
2220 | return -ENOMEM; |
||
2221 | |||
2222 | ret = i915_gem_get_seqno(ring->dev, &req->seqno); |
||
2223 | if (ret) |
||
2224 | goto err; |
||
2225 | |||
2226 | kref_init(&req->ref); |
||
2227 | req->i915 = dev_priv; |
||
2228 | req->ring = ring; |
||
2229 | req->ctx = ctx; |
||
2230 | i915_gem_context_reference(req->ctx); |
||
2231 | |||
2232 | if (i915.enable_execlists) |
||
2233 | ret = intel_logical_ring_alloc_request_extras(req); |
||
2234 | else |
||
2235 | ret = intel_ring_alloc_request_extras(req); |
||
2236 | if (ret) { |
||
2237 | i915_gem_context_unreference(req->ctx); |
||
2238 | goto err; |
||
2239 | } |
||
2240 | |||
2241 | /* |
||
2242 | * Reserve space in the ring buffer for all the commands required to |
||
2243 | * eventually emit this request. This is to guarantee that the |
||
2244 | * i915_add_request() call can't fail. Note that the reserve may need |
||
2245 | * to be redone if the request is not actually submitted straight |
||
2246 | * away, e.g. because a GPU scheduler has deferred it. |
||
2247 | */ |
||
2248 | if (i915.enable_execlists) |
||
2249 | ret = intel_logical_ring_reserve_space(req); |
||
2250 | else |
||
2251 | ret = intel_ring_reserve_space(req); |
||
2252 | if (ret) { |
||
2253 | /* |
||
2254 | * At this point, the request is fully allocated even if not |
||
2255 | * fully prepared. Thus it can be cleaned up using the proper |
||
2256 | * free code. |
||
2257 | */ |
||
2258 | i915_gem_request_cancel(req); |
||
2259 | return ret; |
||
2260 | } |
||
2261 | |||
2262 | *req_out = req; |
||
2263 | return 0; |
||
2264 | |||
2265 | err: |
||
2266 | kfree(req); |
||
2267 | return ret; |
||
2268 | } |
||
2269 | |||
2270 | void i915_gem_request_cancel(struct drm_i915_gem_request *req) |
||
2271 | { |
||
2272 | intel_ring_reserved_space_cancel(req->ringbuf); |
||
2273 | |||
2274 | i915_gem_request_unreference(req); |
||
2275 | } |
||
2276 | |||
5060 | serge | 2277 | struct drm_i915_gem_request * |
2278 | i915_gem_find_active_request(struct intel_engine_cs *ring) |
||
3031 | serge | 2279 | { |
4539 | Serge | 2280 | struct drm_i915_gem_request *request; |
4104 | Serge | 2281 | |
4539 | Serge | 2282 | list_for_each_entry(request, &ring->request_list, list) { |
6084 | serge | 2283 | if (i915_gem_request_completed(request, false)) |
4539 | Serge | 2284 | continue; |
4104 | Serge | 2285 | |
5060 | serge | 2286 | return request; |
4539 | Serge | 2287 | } |
5060 | serge | 2288 | |
2289 | return NULL; |
||
4539 | Serge | 2290 | } |
2291 | |||
5060 | serge | 2292 | static void i915_gem_reset_ring_status(struct drm_i915_private *dev_priv, |
2293 | struct intel_engine_cs *ring) |
||
2294 | { |
||
2295 | struct drm_i915_gem_request *request; |
||
2296 | bool ring_hung; |
||
2297 | |||
2298 | request = i915_gem_find_active_request(ring); |
||
2299 | |||
2300 | if (request == NULL) |
||
2301 | return; |
||
2302 | |||
2303 | ring_hung = ring->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG; |
||
2304 | |||
2305 | i915_set_reset_status(dev_priv, request->ctx, ring_hung); |
||
2306 | |||
2307 | list_for_each_entry_continue(request, &ring->request_list, list) |
||
2308 | i915_set_reset_status(dev_priv, request->ctx, false); |
||
2309 | } |
||
2310 | |||
4539 | Serge | 2311 | static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv, |
5060 | serge | 2312 | struct intel_engine_cs *ring) |
4539 | Serge | 2313 | { |
4560 | Serge | 2314 | while (!list_empty(&ring->active_list)) { |
2315 | struct drm_i915_gem_object *obj; |
||
2316 | |||
2317 | obj = list_first_entry(&ring->active_list, |
||
2318 | struct drm_i915_gem_object, |
||
6084 | serge | 2319 | ring_list[ring->id]); |
4560 | Serge | 2320 | |
6084 | serge | 2321 | i915_gem_object_retire__read(obj, ring->id); |
4560 | Serge | 2322 | } |
2323 | |||
2324 | /* |
||
5354 | serge | 2325 | * Clear the execlists queue up before freeing the requests, as those |
2326 | * are the ones that keep the context and ringbuffer backing objects |
||
2327 | * pinned in place. |
||
2328 | */ |
||
2329 | while (!list_empty(&ring->execlist_queue)) { |
||
6084 | serge | 2330 | struct drm_i915_gem_request *submit_req; |
5354 | serge | 2331 | |
2332 | submit_req = list_first_entry(&ring->execlist_queue, |
||
6084 | serge | 2333 | struct drm_i915_gem_request, |
5354 | serge | 2334 | execlist_link); |
2335 | list_del(&submit_req->execlist_link); |
||
6084 | serge | 2336 | |
2337 | if (submit_req->ctx != ring->default_context) |
||
2338 | intel_lr_context_unpin(submit_req); |
||
2339 | |||
2340 | i915_gem_request_unreference(submit_req); |
||
5354 | serge | 2341 | } |
2342 | |||
2343 | /* |
||
4560 | Serge | 2344 | * We must free the requests after all the corresponding objects have |
2345 | * been moved off active lists. Which is the same order as the normal |
||
2346 | * retire_requests function does. This is important if object hold |
||
2347 | * implicit references on things like e.g. ppgtt address spaces through |
||
2348 | * the request. |
||
2349 | */ |
||
3031 | serge | 2350 | while (!list_empty(&ring->request_list)) { |
2351 | struct drm_i915_gem_request *request; |
||
2332 | Serge | 2352 | |
3031 | serge | 2353 | request = list_first_entry(&ring->request_list, |
2354 | struct drm_i915_gem_request, |
||
2355 | list); |
||
2332 | Serge | 2356 | |
6084 | serge | 2357 | i915_gem_request_retire(request); |
3031 | serge | 2358 | } |
2359 | } |
||
2332 | Serge | 2360 | |
3031 | serge | 2361 | void i915_gem_reset(struct drm_device *dev) |
2362 | { |
||
2363 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
5060 | serge | 2364 | struct intel_engine_cs *ring; |
3031 | serge | 2365 | int i; |
2360 | Serge | 2366 | |
4539 | Serge | 2367 | /* |
2368 | * Before we free the objects from the requests, we need to inspect |
||
2369 | * them for finding the guilty party. As the requests only borrow |
||
2370 | * their reference to the objects, the inspection must be done first. |
||
2371 | */ |
||
3031 | serge | 2372 | for_each_ring(ring, dev_priv, i) |
4539 | Serge | 2373 | i915_gem_reset_ring_status(dev_priv, ring); |
2360 | Serge | 2374 | |
4539 | Serge | 2375 | for_each_ring(ring, dev_priv, i) |
2376 | i915_gem_reset_ring_cleanup(dev_priv, ring); |
||
2377 | |||
5060 | serge | 2378 | i915_gem_context_reset(dev); |
4560 | Serge | 2379 | |
3746 | Serge | 2380 | i915_gem_restore_fences(dev); |
6084 | serge | 2381 | |
2382 | WARN_ON(i915_verify_lists(dev)); |
||
3031 | serge | 2383 | } |
2360 | Serge | 2384 | |
2352 | Serge | 2385 | /** |
2386 | * This function clears the request list as sequence numbers are passed. |
||
2387 | */ |
||
3031 | serge | 2388 | void |
5060 | serge | 2389 | i915_gem_retire_requests_ring(struct intel_engine_cs *ring) |
2352 | Serge | 2390 | { |
6084 | serge | 2391 | WARN_ON(i915_verify_lists(ring->dev)); |
2332 | Serge | 2392 | |
6084 | serge | 2393 | /* Retire requests first as we use it above for the early return. |
2394 | * If we retire requests last, we may use a later seqno and so clear |
||
2395 | * the requests lists without clearing the active list, leading to |
||
2396 | * confusion. |
||
2397 | */ |
||
2398 | while (!list_empty(&ring->request_list)) { |
||
2399 | struct drm_i915_gem_request *request; |
||
2332 | Serge | 2400 | |
6084 | serge | 2401 | request = list_first_entry(&ring->request_list, |
2402 | struct drm_i915_gem_request, |
||
2403 | list); |
||
2332 | Serge | 2404 | |
6084 | serge | 2405 | if (!i915_gem_request_completed(request, true)) |
2406 | break; |
||
2332 | Serge | 2407 | |
6084 | serge | 2408 | i915_gem_request_retire(request); |
2409 | } |
||
2410 | |||
5060 | serge | 2411 | /* Move any buffers on the active list that are no longer referenced |
2412 | * by the ringbuffer to the flushing/inactive lists as appropriate, |
||
2413 | * before we free the context associated with the requests. |
||
2414 | */ |
||
2415 | while (!list_empty(&ring->active_list)) { |
||
2416 | struct drm_i915_gem_object *obj; |
||
2417 | |||
2418 | obj = list_first_entry(&ring->active_list, |
||
2419 | struct drm_i915_gem_object, |
||
6084 | serge | 2420 | ring_list[ring->id]); |
5060 | serge | 2421 | |
6084 | serge | 2422 | if (!list_empty(&obj->last_read_req[ring->id]->list)) |
5060 | serge | 2423 | break; |
2424 | |||
6084 | serge | 2425 | i915_gem_object_retire__read(obj, ring->id); |
5060 | serge | 2426 | } |
2427 | |||
6084 | serge | 2428 | if (unlikely(ring->trace_irq_req && |
2429 | i915_gem_request_completed(ring->trace_irq_req, true))) { |
||
2352 | Serge | 2430 | ring->irq_put(ring); |
6084 | serge | 2431 | i915_gem_request_assign(&ring->trace_irq_req, NULL); |
2352 | Serge | 2432 | } |
2332 | Serge | 2433 | |
2352 | Serge | 2434 | WARN_ON(i915_verify_lists(ring->dev)); |
2435 | } |
||
2332 | Serge | 2436 | |
4560 | Serge | 2437 | bool |
2352 | Serge | 2438 | i915_gem_retire_requests(struct drm_device *dev) |
2439 | { |
||
5060 | serge | 2440 | struct drm_i915_private *dev_priv = dev->dev_private; |
2441 | struct intel_engine_cs *ring; |
||
4560 | Serge | 2442 | bool idle = true; |
2352 | Serge | 2443 | int i; |
2332 | Serge | 2444 | |
4560 | Serge | 2445 | for_each_ring(ring, dev_priv, i) { |
3031 | serge | 2446 | i915_gem_retire_requests_ring(ring); |
4560 | Serge | 2447 | idle &= list_empty(&ring->request_list); |
5354 | serge | 2448 | if (i915.enable_execlists) { |
2449 | unsigned long flags; |
||
2450 | |||
2451 | spin_lock_irqsave(&ring->execlist_lock, flags); |
||
2452 | idle &= list_empty(&ring->execlist_queue); |
||
2453 | spin_unlock_irqrestore(&ring->execlist_lock, flags); |
||
2454 | |||
2455 | intel_execlists_retire_requests(ring); |
||
2456 | } |
||
4560 | Serge | 2457 | } |
2458 | |||
2459 | if (idle) |
||
2460 | mod_delayed_work(dev_priv->wq, |
||
2461 | &dev_priv->mm.idle_work, |
||
2462 | msecs_to_jiffies(100)); |
||
2463 | |||
2464 | return idle; |
||
2352 | Serge | 2465 | } |
2466 | |||
2360 | Serge | 2467 | static void |
2468 | i915_gem_retire_work_handler(struct work_struct *work) |
||
2469 | { |
||
4560 | Serge | 2470 | struct drm_i915_private *dev_priv = |
2471 | container_of(work, typeof(*dev_priv), mm.retire_work.work); |
||
2472 | struct drm_device *dev = dev_priv->dev; |
||
2360 | Serge | 2473 | bool idle; |
2352 | Serge | 2474 | |
2360 | Serge | 2475 | /* Come back later if the device is busy... */ |
4560 | Serge | 2476 | idle = false; |
2477 | if (mutex_trylock(&dev->struct_mutex)) { |
||
2478 | idle = i915_gem_retire_requests(dev); |
||
2479 | mutex_unlock(&dev->struct_mutex); |
||
2480 | } |
||
2481 | if (!idle) |
||
3482 | Serge | 2482 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, |
2483 | round_jiffies_up_relative(HZ)); |
||
4560 | Serge | 2484 | } |
2352 | Serge | 2485 | |
4560 | Serge | 2486 | static void |
2487 | i915_gem_idle_work_handler(struct work_struct *work) |
||
2488 | { |
||
2489 | struct drm_i915_private *dev_priv = |
||
2490 | container_of(work, typeof(*dev_priv), mm.idle_work.work); |
||
6084 | serge | 2491 | struct drm_device *dev = dev_priv->dev; |
2492 | struct intel_engine_cs *ring; |
||
2493 | int i; |
||
2352 | Serge | 2494 | |
6084 | serge | 2495 | for_each_ring(ring, dev_priv, i) |
2496 | if (!list_empty(&ring->request_list)) |
||
2497 | return; |
||
2498 | |||
2499 | intel_mark_idle(dev); |
||
2500 | |||
2501 | if (mutex_trylock(&dev->struct_mutex)) { |
||
2502 | struct intel_engine_cs *ring; |
||
2503 | int i; |
||
2504 | |||
2505 | for_each_ring(ring, dev_priv, i) |
||
2506 | i915_gem_batch_pool_fini(&ring->batch_pool); |
||
2507 | |||
2508 | mutex_unlock(&dev->struct_mutex); |
||
2509 | } |
||
2360 | Serge | 2510 | } |
2511 | |||
2344 | Serge | 2512 | /** |
3031 | serge | 2513 | * Ensures that an object will eventually get non-busy by flushing any required |
2514 | * write domains, emitting any outstanding lazy request and retiring and |
||
2515 | * completed requests. |
||
2352 | Serge | 2516 | */ |
3031 | serge | 2517 | static int |
2518 | i915_gem_object_flush_active(struct drm_i915_gem_object *obj) |
||
2352 | Serge | 2519 | { |
6084 | serge | 2520 | int i; |
2352 | Serge | 2521 | |
6084 | serge | 2522 | if (!obj->active) |
2523 | return 0; |
||
2352 | Serge | 2524 | |
6084 | serge | 2525 | for (i = 0; i < I915_NUM_RINGS; i++) { |
2526 | struct drm_i915_gem_request *req; |
||
2527 | |||
2528 | req = obj->last_read_req[i]; |
||
2529 | if (req == NULL) |
||
2530 | continue; |
||
2531 | |||
2532 | if (list_empty(&req->list)) |
||
2533 | goto retire; |
||
2534 | |||
2535 | if (i915_gem_request_completed(req, true)) { |
||
2536 | __i915_gem_request_retire__upto(req); |
||
2537 | retire: |
||
2538 | i915_gem_object_retire__read(obj, i); |
||
2539 | } |
||
3031 | serge | 2540 | } |
2352 | Serge | 2541 | |
3031 | serge | 2542 | return 0; |
2543 | } |
||
2352 | Serge | 2544 | |
3243 | Serge | 2545 | /** |
2546 | * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT |
||
2547 | * @DRM_IOCTL_ARGS: standard ioctl arguments |
||
2548 | * |
||
2549 | * Returns 0 if successful, else an error is returned with the remaining time in |
||
2550 | * the timeout parameter. |
||
2551 | * -ETIME: object is still busy after timeout |
||
2552 | * -ERESTARTSYS: signal interrupted the wait |
||
2553 | * -ENONENT: object doesn't exist |
||
2554 | * Also possible, but rare: |
||
2555 | * -EAGAIN: GPU wedged |
||
2556 | * -ENOMEM: damn |
||
2557 | * -ENODEV: Internal IRQ fail |
||
2558 | * -E?: The add request failed |
||
2559 | * |
||
2560 | * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any |
||
2561 | * non-zero timeout parameter the wait ioctl will wait for the given number of |
||
2562 | * nanoseconds on an object becoming unbusy. Since the wait itself does so |
||
2563 | * without holding struct_mutex the object may become re-busied before this |
||
2564 | * function completes. A similar but shorter * race condition exists in the busy |
||
2565 | * ioctl |
||
2566 | */ |
||
4246 | Serge | 2567 | int |
2568 | i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) |
||
2569 | { |
||
5060 | serge | 2570 | struct drm_i915_private *dev_priv = dev->dev_private; |
4246 | Serge | 2571 | struct drm_i915_gem_wait *args = data; |
2572 | struct drm_i915_gem_object *obj; |
||
6084 | serge | 2573 | struct drm_i915_gem_request *req[I915_NUM_RINGS]; |
4246 | Serge | 2574 | unsigned reset_counter; |
6084 | serge | 2575 | int i, n = 0; |
2576 | int ret; |
||
2352 | Serge | 2577 | |
5354 | serge | 2578 | if (args->flags != 0) |
2579 | return -EINVAL; |
||
2580 | |||
4246 | Serge | 2581 | ret = i915_mutex_lock_interruptible(dev); |
2582 | if (ret) |
||
2583 | return ret; |
||
2352 | Serge | 2584 | |
4246 | Serge | 2585 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->bo_handle)); |
2586 | if (&obj->base == NULL) { |
||
2587 | mutex_unlock(&dev->struct_mutex); |
||
2588 | return -ENOENT; |
||
2589 | } |
||
2352 | Serge | 2590 | |
4246 | Serge | 2591 | /* Need to make sure the object gets inactive eventually. */ |
2592 | ret = i915_gem_object_flush_active(obj); |
||
2593 | if (ret) |
||
2594 | goto out; |
||
2352 | Serge | 2595 | |
6084 | serge | 2596 | if (!obj->active) |
2597 | goto out; |
||
2352 | Serge | 2598 | |
4246 | Serge | 2599 | /* Do this after OLR check to make sure we make forward progress polling |
6084 | serge | 2600 | * on this IOCTL with a timeout == 0 (like busy ioctl) |
4246 | Serge | 2601 | */ |
6084 | serge | 2602 | if (args->timeout_ns == 0) { |
4246 | Serge | 2603 | ret = -ETIME; |
2604 | goto out; |
||
2605 | } |
||
2352 | Serge | 2606 | |
4246 | Serge | 2607 | drm_gem_object_unreference(&obj->base); |
2608 | reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); |
||
6084 | serge | 2609 | |
2610 | for (i = 0; i < I915_NUM_RINGS; i++) { |
||
2611 | if (obj->last_read_req[i] == NULL) |
||
2612 | continue; |
||
2613 | |||
2614 | req[n++] = i915_gem_request_reference(obj->last_read_req[i]); |
||
2615 | } |
||
2616 | |||
4246 | Serge | 2617 | mutex_unlock(&dev->struct_mutex); |
2352 | Serge | 2618 | |
6084 | serge | 2619 | for (i = 0; i < n; i++) { |
2620 | if (ret == 0) |
||
2621 | ret = __i915_wait_request(req[i], reset_counter, true, |
||
2622 | args->timeout_ns > 0 ? &args->timeout_ns : NULL, |
||
2623 | file->driver_priv); |
||
2624 | i915_gem_request_unreference__unlocked(req[i]); |
||
2625 | } |
||
2626 | return ret; |
||
3243 | Serge | 2627 | |
4246 | Serge | 2628 | out: |
2629 | drm_gem_object_unreference(&obj->base); |
||
2630 | mutex_unlock(&dev->struct_mutex); |
||
2631 | return ret; |
||
2632 | } |
||
3243 | Serge | 2633 | |
6084 | serge | 2634 | static int |
2635 | __i915_gem_object_sync(struct drm_i915_gem_object *obj, |
||
2636 | struct intel_engine_cs *to, |
||
2637 | struct drm_i915_gem_request *from_req, |
||
2638 | struct drm_i915_gem_request **to_req) |
||
2639 | { |
||
2640 | struct intel_engine_cs *from; |
||
2641 | int ret; |
||
2642 | |||
2643 | from = i915_gem_request_get_ring(from_req); |
||
2644 | if (to == from) |
||
2645 | return 0; |
||
2646 | |||
2647 | if (i915_gem_request_completed(from_req, true)) |
||
2648 | return 0; |
||
2649 | |||
2650 | if (!i915_semaphore_is_enabled(obj->base.dev)) { |
||
2651 | struct drm_i915_private *i915 = to_i915(obj->base.dev); |
||
2652 | ret = __i915_wait_request(from_req, |
||
2653 | atomic_read(&i915->gpu_error.reset_counter), |
||
2654 | i915->mm.interruptible, |
||
2655 | NULL, |
||
2656 | &i915->rps.semaphores); |
||
2657 | if (ret) |
||
2658 | return ret; |
||
2659 | |||
2660 | i915_gem_object_retire_request(obj, from_req); |
||
2661 | } else { |
||
2662 | int idx = intel_ring_sync_index(from, to); |
||
2663 | u32 seqno = i915_gem_request_get_seqno(from_req); |
||
2664 | |||
2665 | WARN_ON(!to_req); |
||
2666 | |||
2667 | if (seqno <= from->semaphore.sync_seqno[idx]) |
||
2668 | return 0; |
||
2669 | |||
2670 | if (*to_req == NULL) { |
||
2671 | ret = i915_gem_request_alloc(to, to->default_context, to_req); |
||
2672 | if (ret) |
||
2673 | return ret; |
||
2674 | } |
||
2675 | |||
2676 | trace_i915_gem_ring_sync_to(*to_req, from, from_req); |
||
2677 | ret = to->semaphore.sync_to(*to_req, from, seqno); |
||
2678 | if (ret) |
||
2679 | return ret; |
||
2680 | |||
2681 | /* We use last_read_req because sync_to() |
||
2682 | * might have just caused seqno wrap under |
||
2683 | * the radar. |
||
2684 | */ |
||
2685 | from->semaphore.sync_seqno[idx] = |
||
2686 | i915_gem_request_get_seqno(obj->last_read_req[from->id]); |
||
2687 | } |
||
2688 | |||
2689 | return 0; |
||
2690 | } |
||
2691 | |||
2352 | Serge | 2692 | /** |
3031 | serge | 2693 | * i915_gem_object_sync - sync an object to a ring. |
2694 | * |
||
2695 | * @obj: object which may be in use on another ring. |
||
2696 | * @to: ring we wish to use the object on. May be NULL. |
||
6084 | serge | 2697 | * @to_req: request we wish to use the object for. See below. |
2698 | * This will be allocated and returned if a request is |
||
2699 | * required but not passed in. |
||
3031 | serge | 2700 | * |
2701 | * This code is meant to abstract object synchronization with the GPU. |
||
2702 | * Calling with NULL implies synchronizing the object with the CPU |
||
6084 | serge | 2703 | * rather than a particular GPU ring. Conceptually we serialise writes |
2704 | * between engines inside the GPU. We only allow one engine to write |
||
2705 | * into a buffer at any time, but multiple readers. To ensure each has |
||
2706 | * a coherent view of memory, we must: |
||
3031 | serge | 2707 | * |
6084 | serge | 2708 | * - If there is an outstanding write request to the object, the new |
2709 | * request must wait for it to complete (either CPU or in hw, requests |
||
2710 | * on the same ring will be naturally ordered). |
||
2711 | * |
||
2712 | * - If we are a write request (pending_write_domain is set), the new |
||
2713 | * request must wait for outstanding read requests to complete. |
||
2714 | * |
||
2715 | * For CPU synchronisation (NULL to) no request is required. For syncing with |
||
2716 | * rings to_req must be non-NULL. However, a request does not have to be |
||
2717 | * pre-allocated. If *to_req is NULL and sync commands will be emitted then a |
||
2718 | * request will be allocated automatically and returned through *to_req. Note |
||
2719 | * that it is not guaranteed that commands will be emitted (because the system |
||
2720 | * might already be idle). Hence there is no need to create a request that |
||
2721 | * might never have any work submitted. Note further that if a request is |
||
2722 | * returned in *to_req, it is the responsibility of the caller to submit |
||
2723 | * that request (after potentially adding more work to it). |
||
2724 | * |
||
3031 | serge | 2725 | * Returns 0 if successful, else propagates up the lower layer error. |
2344 | Serge | 2726 | */ |
2727 | int |
||
3031 | serge | 2728 | i915_gem_object_sync(struct drm_i915_gem_object *obj, |
6084 | serge | 2729 | struct intel_engine_cs *to, |
2730 | struct drm_i915_gem_request **to_req) |
||
2344 | Serge | 2731 | { |
6084 | serge | 2732 | const bool readonly = obj->base.pending_write_domain == 0; |
2733 | struct drm_i915_gem_request *req[I915_NUM_RINGS]; |
||
2734 | int ret, i, n; |
||
2332 | Serge | 2735 | |
6084 | serge | 2736 | if (!obj->active) |
3031 | serge | 2737 | return 0; |
2332 | Serge | 2738 | |
6084 | serge | 2739 | if (to == NULL) |
2740 | return i915_gem_object_wait_rendering(obj, readonly); |
||
2332 | Serge | 2741 | |
6084 | serge | 2742 | n = 0; |
2743 | if (readonly) { |
||
2744 | if (obj->last_write_req) |
||
2745 | req[n++] = obj->last_write_req; |
||
2746 | } else { |
||
2747 | for (i = 0; i < I915_NUM_RINGS; i++) |
||
2748 | if (obj->last_read_req[i]) |
||
2749 | req[n++] = obj->last_read_req[i]; |
||
2750 | } |
||
2751 | for (i = 0; i < n; i++) { |
||
2752 | ret = __i915_gem_object_sync(obj, to, req[i], to_req); |
||
2753 | if (ret) |
||
2754 | return ret; |
||
2755 | } |
||
3031 | serge | 2756 | |
6084 | serge | 2757 | return 0; |
2344 | Serge | 2758 | } |
2332 | Serge | 2759 | |
2344 | Serge | 2760 | static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj) |
2761 | { |
||
2762 | u32 old_write_domain, old_read_domains; |
||
2332 | Serge | 2763 | |
2344 | Serge | 2764 | /* Force a pagefault for domain tracking on next user access */ |
6084 | serge | 2765 | i915_gem_release_mmap(obj); |
2332 | Serge | 2766 | |
2344 | Serge | 2767 | if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) |
2768 | return; |
||
2332 | Serge | 2769 | |
3480 | Serge | 2770 | /* Wait for any direct GTT access to complete */ |
2771 | mb(); |
||
2772 | |||
2344 | Serge | 2773 | old_read_domains = obj->base.read_domains; |
2774 | old_write_domain = obj->base.write_domain; |
||
2351 | Serge | 2775 | |
2344 | Serge | 2776 | obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT; |
2777 | obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT; |
||
2332 | Serge | 2778 | |
2351 | Serge | 2779 | trace_i915_gem_object_change_domain(obj, |
2780 | old_read_domains, |
||
2781 | old_write_domain); |
||
2344 | Serge | 2782 | } |
2332 | Serge | 2783 | |
6084 | serge | 2784 | static int __i915_vma_unbind(struct i915_vma *vma, bool wait) |
2344 | Serge | 2785 | { |
4104 | Serge | 2786 | struct drm_i915_gem_object *obj = vma->obj; |
5060 | serge | 2787 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
3480 | Serge | 2788 | int ret; |
3263 | Serge | 2789 | if(obj == get_fb_obj()) |
5367 | serge | 2790 | { |
2791 | WARN(1,"attempt to unbind fb object\n"); |
||
3263 | Serge | 2792 | return 0; |
5367 | serge | 2793 | }; |
3263 | Serge | 2794 | |
4104 | Serge | 2795 | if (list_empty(&vma->vma_link)) |
2344 | Serge | 2796 | return 0; |
2332 | Serge | 2797 | |
4560 | Serge | 2798 | if (!drm_mm_node_allocated(&vma->node)) { |
2799 | i915_gem_vma_destroy(vma); |
||
2800 | return 0; |
||
2801 | } |
||
2802 | |||
5060 | serge | 2803 | if (vma->pin_count) |
3031 | serge | 2804 | return -EBUSY; |
2332 | Serge | 2805 | |
3243 | Serge | 2806 | BUG_ON(obj->pages == NULL); |
3031 | serge | 2807 | |
6084 | serge | 2808 | if (wait) { |
2809 | ret = i915_gem_object_wait_rendering(obj, false); |
||
2810 | if (ret) |
||
2811 | return ret; |
||
2812 | } |
||
2332 | Serge | 2813 | |
6084 | serge | 2814 | if (i915_is_ggtt(vma->vm) && |
2815 | vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) { |
||
2816 | i915_gem_object_finish_gtt(obj); |
||
5354 | serge | 2817 | |
6084 | serge | 2818 | /* release the fence reg _after_ flushing */ |
2819 | ret = i915_gem_object_put_fence(obj); |
||
2820 | if (ret) |
||
2821 | return ret; |
||
5060 | serge | 2822 | } |
2332 | Serge | 2823 | |
4104 | Serge | 2824 | trace_i915_vma_unbind(vma); |
2332 | Serge | 2825 | |
6084 | serge | 2826 | vma->vm->unbind_vma(vma); |
2827 | vma->bound = 0; |
||
2332 | Serge | 2828 | |
5060 | serge | 2829 | list_del_init(&vma->mm_list); |
6084 | serge | 2830 | if (i915_is_ggtt(vma->vm)) { |
2831 | if (vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) { |
||
2832 | obj->map_and_fenceable = false; |
||
2833 | } else if (vma->ggtt_view.pages) { |
||
2834 | sg_free_table(vma->ggtt_view.pages); |
||
2835 | kfree(vma->ggtt_view.pages); |
||
2836 | } |
||
2837 | vma->ggtt_view.pages = NULL; |
||
2838 | } |
||
2332 | Serge | 2839 | |
4104 | Serge | 2840 | drm_mm_remove_node(&vma->node); |
2841 | i915_gem_vma_destroy(vma); |
||
2842 | |||
2843 | /* Since the unbound list is global, only move to that list if |
||
4560 | Serge | 2844 | * no more VMAs exist. */ |
6084 | serge | 2845 | if (list_empty(&obj->vma_list)) |
4104 | Serge | 2846 | list_move_tail(&obj->global_list, &dev_priv->mm.unbound_list); |
2847 | |||
4560 | Serge | 2848 | /* And finally now the object is completely decoupled from this vma, |
2849 | * we can drop its hold on the backing storage and allow it to be |
||
2850 | * reaped by the shrinker. |
||
2851 | */ |
||
2852 | i915_gem_object_unpin_pages(obj); |
||
2853 | |||
2344 | Serge | 2854 | return 0; |
2855 | } |
||
2332 | Serge | 2856 | |
6084 | serge | 2857 | int i915_vma_unbind(struct i915_vma *vma) |
2858 | { |
||
2859 | return __i915_vma_unbind(vma, true); |
||
2860 | } |
||
2861 | |||
2862 | int __i915_vma_unbind_no_wait(struct i915_vma *vma) |
||
2863 | { |
||
2864 | return __i915_vma_unbind(vma, false); |
||
2865 | } |
||
2866 | |||
3031 | serge | 2867 | int i915_gpu_idle(struct drm_device *dev) |
2344 | Serge | 2868 | { |
5060 | serge | 2869 | struct drm_i915_private *dev_priv = dev->dev_private; |
2870 | struct intel_engine_cs *ring; |
||
2344 | Serge | 2871 | int ret, i; |
2332 | Serge | 2872 | |
2344 | Serge | 2873 | /* Flush everything onto the inactive list. */ |
3031 | serge | 2874 | for_each_ring(ring, dev_priv, i) { |
5354 | serge | 2875 | if (!i915.enable_execlists) { |
6084 | serge | 2876 | struct drm_i915_gem_request *req; |
3031 | serge | 2877 | |
6084 | serge | 2878 | ret = i915_gem_request_alloc(ring, ring->default_context, &req); |
2352 | Serge | 2879 | if (ret) |
2880 | return ret; |
||
2344 | Serge | 2881 | |
6084 | serge | 2882 | ret = i915_switch_context(req); |
2883 | if (ret) { |
||
2884 | i915_gem_request_cancel(req); |
||
2885 | return ret; |
||
2886 | } |
||
2344 | Serge | 2887 | |
6084 | serge | 2888 | i915_add_request_no_flush(req); |
2889 | } |
||
2332 | Serge | 2890 | |
6084 | serge | 2891 | ret = intel_ring_idle(ring); |
3031 | serge | 2892 | if (ret) |
2893 | return ret; |
||
2894 | } |
||
2332 | Serge | 2895 | |
6084 | serge | 2896 | WARN_ON(i915_verify_lists(dev)); |
3031 | serge | 2897 | return 0; |
2898 | } |
||
2332 | Serge | 2899 | |
5354 | serge | 2900 | static bool i915_gem_valid_gtt_space(struct i915_vma *vma, |
3031 | serge | 2901 | unsigned long cache_level) |
2902 | { |
||
5354 | serge | 2903 | struct drm_mm_node *gtt_space = &vma->node; |
3031 | serge | 2904 | struct drm_mm_node *other; |
2332 | Serge | 2905 | |
5354 | serge | 2906 | /* |
2907 | * On some machines we have to be careful when putting differing types |
||
2908 | * of snoopable memory together to avoid the prefetcher crossing memory |
||
2909 | * domains and dying. During vm initialisation, we decide whether or not |
||
2910 | * these constraints apply and set the drm_mm.color_adjust |
||
2911 | * appropriately. |
||
3031 | serge | 2912 | */ |
5354 | serge | 2913 | if (vma->vm->mm.color_adjust == NULL) |
3031 | serge | 2914 | return true; |
2332 | Serge | 2915 | |
4104 | Serge | 2916 | if (!drm_mm_node_allocated(gtt_space)) |
3031 | serge | 2917 | return true; |
2332 | Serge | 2918 | |
3031 | serge | 2919 | if (list_empty(>t_space->node_list)) |
2920 | return true; |
||
2332 | Serge | 2921 | |
3031 | serge | 2922 | other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list); |
2923 | if (other->allocated && !other->hole_follows && other->color != cache_level) |
||
2924 | return false; |
||
2344 | Serge | 2925 | |
3031 | serge | 2926 | other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list); |
2927 | if (other->allocated && !gtt_space->hole_follows && other->color != cache_level) |
||
2928 | return false; |
||
2344 | Serge | 2929 | |
3031 | serge | 2930 | return true; |
2931 | } |
||
2344 | Serge | 2932 | |
2332 | Serge | 2933 | /** |
6084 | serge | 2934 | * Finds free space in the GTT aperture and binds the object or a view of it |
2935 | * there. |
||
2332 | Serge | 2936 | */ |
5060 | serge | 2937 | static struct i915_vma * |
4104 | Serge | 2938 | i915_gem_object_bind_to_vm(struct drm_i915_gem_object *obj, |
2939 | struct i915_address_space *vm, |
||
6084 | serge | 2940 | const struct i915_ggtt_view *ggtt_view, |
2941 | unsigned alignment, |
||
5060 | serge | 2942 | uint64_t flags) |
2332 | Serge | 2943 | { |
2944 | struct drm_device *dev = obj->base.dev; |
||
5060 | serge | 2945 | struct drm_i915_private *dev_priv = dev->dev_private; |
6084 | serge | 2946 | u32 fence_alignment, unfenced_alignment; |
2947 | u32 search_flag, alloc_flag; |
||
2948 | u64 start, end; |
||
2949 | u64 size, fence_size; |
||
4104 | Serge | 2950 | struct i915_vma *vma; |
2332 | Serge | 2951 | int ret; |
2326 | Serge | 2952 | |
6084 | serge | 2953 | if (i915_is_ggtt(vm)) { |
2954 | u32 view_size; |
||
2332 | Serge | 2955 | |
6084 | serge | 2956 | if (WARN_ON(!ggtt_view)) |
2957 | return ERR_PTR(-EINVAL); |
||
2958 | |||
2959 | view_size = i915_ggtt_view_size(obj, ggtt_view); |
||
2960 | |||
2961 | fence_size = i915_gem_get_gtt_size(dev, |
||
2962 | view_size, |
||
2963 | obj->tiling_mode); |
||
2964 | fence_alignment = i915_gem_get_gtt_alignment(dev, |
||
2965 | view_size, |
||
2966 | obj->tiling_mode, |
||
2967 | true); |
||
2968 | unfenced_alignment = i915_gem_get_gtt_alignment(dev, |
||
2969 | view_size, |
||
2970 | obj->tiling_mode, |
||
2971 | false); |
||
2972 | size = flags & PIN_MAPPABLE ? fence_size : view_size; |
||
2973 | } else { |
||
2974 | fence_size = i915_gem_get_gtt_size(dev, |
||
2975 | obj->base.size, |
||
2976 | obj->tiling_mode); |
||
2977 | fence_alignment = i915_gem_get_gtt_alignment(dev, |
||
2978 | obj->base.size, |
||
2979 | obj->tiling_mode, |
||
2980 | true); |
||
2981 | unfenced_alignment = |
||
2982 | i915_gem_get_gtt_alignment(dev, |
||
2983 | obj->base.size, |
||
2984 | obj->tiling_mode, |
||
2985 | false); |
||
2986 | size = flags & PIN_MAPPABLE ? fence_size : obj->base.size; |
||
2987 | } |
||
2988 | |||
2989 | start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0; |
||
2990 | end = vm->total; |
||
2991 | if (flags & PIN_MAPPABLE) |
||
2992 | end = min_t(u64, end, dev_priv->gtt.mappable_end); |
||
2993 | if (flags & PIN_ZONE_4G) |
||
2994 | end = min_t(u64, end, (1ULL << 32)); |
||
2995 | |||
2332 | Serge | 2996 | if (alignment == 0) |
5060 | serge | 2997 | alignment = flags & PIN_MAPPABLE ? fence_alignment : |
2332 | Serge | 2998 | unfenced_alignment; |
5060 | serge | 2999 | if (flags & PIN_MAPPABLE && alignment & (fence_alignment - 1)) { |
6084 | serge | 3000 | DRM_DEBUG("Invalid object (view type=%u) alignment requested %u\n", |
3001 | ggtt_view ? ggtt_view->type : 0, |
||
3002 | alignment); |
||
5060 | serge | 3003 | return ERR_PTR(-EINVAL); |
2332 | Serge | 3004 | } |
3005 | |||
6084 | serge | 3006 | /* If binding the object/GGTT view requires more space than the entire |
3007 | * aperture has, reject it early before evicting everything in a vain |
||
3008 | * attempt to find space. |
||
2332 | Serge | 3009 | */ |
6084 | serge | 3010 | if (size > end) { |
3011 | DRM_DEBUG("Attempting to bind an object (view type=%u) larger than the aperture: size=%llu > %s aperture=%llu\n", |
||
3012 | ggtt_view ? ggtt_view->type : 0, |
||
3013 | size, |
||
5060 | serge | 3014 | flags & PIN_MAPPABLE ? "mappable" : "total", |
3015 | end); |
||
3016 | return ERR_PTR(-E2BIG); |
||
2332 | Serge | 3017 | } |
3018 | |||
3031 | serge | 3019 | ret = i915_gem_object_get_pages(obj); |
3020 | if (ret) |
||
5060 | serge | 3021 | return ERR_PTR(ret); |
3031 | serge | 3022 | |
3243 | Serge | 3023 | i915_gem_object_pin_pages(obj); |
3024 | |||
6084 | serge | 3025 | vma = ggtt_view ? i915_gem_obj_lookup_or_create_ggtt_vma(obj, ggtt_view) : |
3026 | i915_gem_obj_lookup_or_create_vma(obj, vm); |
||
3027 | |||
5060 | serge | 3028 | if (IS_ERR(vma)) |
4104 | Serge | 3029 | goto err_unpin; |
3243 | Serge | 3030 | |
6084 | serge | 3031 | if (flags & PIN_HIGH) { |
3032 | search_flag = DRM_MM_SEARCH_BELOW; |
||
3033 | alloc_flag = DRM_MM_CREATE_TOP; |
||
3034 | } else { |
||
3035 | search_flag = DRM_MM_SEARCH_DEFAULT; |
||
3036 | alloc_flag = DRM_MM_CREATE_DEFAULT; |
||
3037 | } |
||
3038 | |||
4104 | Serge | 3039 | search_free: |
3040 | ret = drm_mm_insert_node_in_range_generic(&vm->mm, &vma->node, |
||
3041 | size, alignment, |
||
5060 | serge | 3042 | obj->cache_level, |
3043 | start, end, |
||
6084 | serge | 3044 | search_flag, |
3045 | alloc_flag); |
||
3243 | Serge | 3046 | if (ret) { |
2332 | Serge | 3047 | |
4104 | Serge | 3048 | goto err_free_vma; |
2332 | Serge | 3049 | } |
5354 | serge | 3050 | if (WARN_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level))) { |
4104 | Serge | 3051 | ret = -EINVAL; |
3052 | goto err_remove_node; |
||
3031 | serge | 3053 | } |
2332 | Serge | 3054 | |
6084 | serge | 3055 | trace_i915_vma_bind(vma, flags); |
3056 | ret = i915_vma_bind(vma, obj->cache_level, flags); |
||
4104 | Serge | 3057 | if (ret) |
3058 | goto err_remove_node; |
||
2332 | Serge | 3059 | |
4104 | Serge | 3060 | list_move_tail(&obj->global_list, &dev_priv->mm.bound_list); |
3061 | list_add_tail(&vma->mm_list, &vm->inactive_list); |
||
2332 | Serge | 3062 | |
5060 | serge | 3063 | return vma; |
4104 | Serge | 3064 | |
3065 | err_remove_node: |
||
3066 | drm_mm_remove_node(&vma->node); |
||
3067 | err_free_vma: |
||
3068 | i915_gem_vma_destroy(vma); |
||
5060 | serge | 3069 | vma = ERR_PTR(ret); |
4104 | Serge | 3070 | err_unpin: |
3071 | i915_gem_object_unpin_pages(obj); |
||
5060 | serge | 3072 | return vma; |
2332 | Serge | 3073 | } |
3074 | |||
4104 | Serge | 3075 | bool |
3076 | i915_gem_clflush_object(struct drm_i915_gem_object *obj, |
||
3077 | bool force) |
||
2332 | Serge | 3078 | { |
3079 | /* If we don't have a page list set up, then we're not pinned |
||
3080 | * to GPU, and we can ignore the cache flush because it'll happen |
||
3081 | * again at bind time. |
||
3082 | */ |
||
3243 | Serge | 3083 | if (obj->pages == NULL) |
4104 | Serge | 3084 | return false; |
2332 | Serge | 3085 | |
3480 | Serge | 3086 | /* |
3087 | * Stolen memory is always coherent with the GPU as it is explicitly |
||
3088 | * marked as wc by the system, or the system is cache-coherent. |
||
3089 | */ |
||
5354 | serge | 3090 | if (obj->stolen || obj->phys_handle) |
4104 | Serge | 3091 | return false; |
3480 | Serge | 3092 | |
2332 | Serge | 3093 | /* If the GPU is snooping the contents of the CPU cache, |
3094 | * we do not need to manually clear the CPU cache lines. However, |
||
3095 | * the caches are only snooped when the render cache is |
||
3096 | * flushed/invalidated. As we always have to emit invalidations |
||
3097 | * and flushes when moving into and out of the RENDER domain, correct |
||
3098 | * snooping behaviour occurs naturally as the result of our domain |
||
3099 | * tracking. |
||
3100 | */ |
||
6084 | serge | 3101 | if (!force && cpu_cache_is_coherent(obj->base.dev, obj->cache_level)) { |
3102 | obj->cache_dirty = true; |
||
4104 | Serge | 3103 | return false; |
6084 | serge | 3104 | } |
2332 | Serge | 3105 | |
4293 | Serge | 3106 | trace_i915_gem_object_clflush(obj); |
3107 | drm_clflush_sg(obj->pages); |
||
6084 | serge | 3108 | obj->cache_dirty = false; |
2344 | Serge | 3109 | |
4104 | Serge | 3110 | return true; |
2332 | Serge | 3111 | } |
3112 | |||
2344 | Serge | 3113 | /** Flushes the GTT write domain for the object if it's dirty. */ |
3114 | static void |
||
3115 | i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj) |
||
3116 | { |
||
3117 | uint32_t old_write_domain; |
||
2332 | Serge | 3118 | |
2344 | Serge | 3119 | if (obj->base.write_domain != I915_GEM_DOMAIN_GTT) |
3120 | return; |
||
2332 | Serge | 3121 | |
2344 | Serge | 3122 | /* No actual flushing is required for the GTT write domain. Writes |
3123 | * to it immediately go to main memory as far as we know, so there's |
||
3124 | * no chipset flush. It also doesn't land in render cache. |
||
3125 | * |
||
3126 | * However, we do have to enforce the order so that all writes through |
||
3127 | * the GTT land before any writes to the device, such as updates to |
||
3128 | * the GATT itself. |
||
3129 | */ |
||
3130 | wmb(); |
||
2332 | Serge | 3131 | |
2344 | Serge | 3132 | old_write_domain = obj->base.write_domain; |
3133 | obj->base.write_domain = 0; |
||
2332 | Serge | 3134 | |
6084 | serge | 3135 | intel_fb_obj_flush(obj, false, ORIGIN_GTT); |
5354 | serge | 3136 | |
2351 | Serge | 3137 | trace_i915_gem_object_change_domain(obj, |
3138 | obj->base.read_domains, |
||
3139 | old_write_domain); |
||
2344 | Serge | 3140 | } |
2332 | Serge | 3141 | |
3142 | /** Flushes the CPU write domain for the object if it's dirty. */ |
||
2326 | Serge | 3143 | static void |
6084 | serge | 3144 | i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj) |
2332 | Serge | 3145 | { |
3146 | uint32_t old_write_domain; |
||
3147 | |||
3148 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) |
||
3149 | return; |
||
3150 | |||
6084 | serge | 3151 | if (i915_gem_clflush_object(obj, obj->pin_display)) |
3152 | i915_gem_chipset_flush(obj->base.dev); |
||
4104 | Serge | 3153 | |
2332 | Serge | 3154 | old_write_domain = obj->base.write_domain; |
3155 | obj->base.write_domain = 0; |
||
3156 | |||
6084 | serge | 3157 | intel_fb_obj_flush(obj, false, ORIGIN_CPU); |
5354 | serge | 3158 | |
2351 | Serge | 3159 | trace_i915_gem_object_change_domain(obj, |
3160 | obj->base.read_domains, |
||
3161 | old_write_domain); |
||
2332 | Serge | 3162 | } |
3163 | |||
3164 | /** |
||
3165 | * Moves a single object to the GTT read, and possibly write domain. |
||
3166 | * |
||
3167 | * This function returns when the move is complete, including waiting on |
||
3168 | * flushes to occur. |
||
3169 | */ |
||
3170 | int |
||
3171 | i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write) |
||
3172 | { |
||
3173 | uint32_t old_write_domain, old_read_domains; |
||
6084 | serge | 3174 | struct i915_vma *vma; |
2332 | Serge | 3175 | int ret; |
3176 | |||
3177 | if (obj->base.write_domain == I915_GEM_DOMAIN_GTT) |
||
3178 | return 0; |
||
3179 | |||
3031 | serge | 3180 | ret = i915_gem_object_wait_rendering(obj, !write); |
6084 | serge | 3181 | if (ret) |
3182 | return ret; |
||
2332 | Serge | 3183 | |
6084 | serge | 3184 | /* Flush and acquire obj->pages so that we are coherent through |
3185 | * direct access in memory with previous cached writes through |
||
3186 | * shmemfs and that our cache domain tracking remains valid. |
||
3187 | * For example, if the obj->filp was moved to swap without us |
||
3188 | * being notified and releasing the pages, we would mistakenly |
||
3189 | * continue to assume that the obj remained out of the CPU cached |
||
3190 | * domain. |
||
3191 | */ |
||
3192 | ret = i915_gem_object_get_pages(obj); |
||
3193 | if (ret) |
||
3194 | return ret; |
||
2332 | Serge | 3195 | |
6084 | serge | 3196 | i915_gem_object_flush_cpu_write_domain(obj); |
3197 | |||
3480 | Serge | 3198 | /* Serialise direct access to this object with the barriers for |
3199 | * coherent writes from the GPU, by effectively invalidating the |
||
3200 | * GTT domain upon first access. |
||
3201 | */ |
||
3202 | if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) |
||
3203 | mb(); |
||
3204 | |||
2332 | Serge | 3205 | old_write_domain = obj->base.write_domain; |
3206 | old_read_domains = obj->base.read_domains; |
||
3207 | |||
3208 | /* It should now be out of any other write domains, and we can update |
||
3209 | * the domain values for our changes. |
||
3210 | */ |
||
3211 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0); |
||
3212 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; |
||
3213 | if (write) { |
||
3214 | obj->base.read_domains = I915_GEM_DOMAIN_GTT; |
||
3215 | obj->base.write_domain = I915_GEM_DOMAIN_GTT; |
||
3216 | obj->dirty = 1; |
||
3217 | } |
||
3218 | |||
2351 | Serge | 3219 | trace_i915_gem_object_change_domain(obj, |
3220 | old_read_domains, |
||
3221 | old_write_domain); |
||
3222 | |||
3031 | serge | 3223 | /* And bump the LRU for this access */ |
6084 | serge | 3224 | vma = i915_gem_obj_to_ggtt(obj); |
3225 | if (vma && drm_mm_node_allocated(&vma->node) && !obj->active) |
||
3226 | list_move_tail(&vma->mm_list, |
||
3227 | &to_i915(obj->base.dev)->gtt.base.inactive_list); |
||
3031 | serge | 3228 | |
2332 | Serge | 3229 | return 0; |
3230 | } |
||
3231 | |||
6084 | serge | 3232 | /** |
3233 | * Changes the cache-level of an object across all VMA. |
||
3234 | * |
||
3235 | * After this function returns, the object will be in the new cache-level |
||
3236 | * across all GTT and the contents of the backing storage will be coherent, |
||
3237 | * with respect to the new cache-level. In order to keep the backing storage |
||
3238 | * coherent for all users, we only allow a single cache level to be set |
||
3239 | * globally on the object and prevent it from being changed whilst the |
||
3240 | * hardware is reading from the object. That is if the object is currently |
||
3241 | * on the scanout it will be set to uncached (or equivalent display |
||
3242 | * cache coherency) and all non-MOCS GPU access will also be uncached so |
||
3243 | * that all direct access to the scanout remains coherent. |
||
3244 | */ |
||
2335 | Serge | 3245 | int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj, |
3246 | enum i915_cache_level cache_level) |
||
3247 | { |
||
3031 | serge | 3248 | struct drm_device *dev = obj->base.dev; |
5060 | serge | 3249 | struct i915_vma *vma, *next; |
6084 | serge | 3250 | bool bound = false; |
3251 | int ret = 0; |
||
2332 | Serge | 3252 | |
2335 | Serge | 3253 | if (obj->cache_level == cache_level) |
6084 | serge | 3254 | goto out; |
2332 | Serge | 3255 | |
6084 | serge | 3256 | /* Inspect the list of currently bound VMA and unbind any that would |
3257 | * be invalid given the new cache-level. This is principally to |
||
3258 | * catch the issue of the CS prefetch crossing page boundaries and |
||
3259 | * reading an invalid PTE on older architectures. |
||
3260 | */ |
||
3261 | list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) { |
||
3262 | if (!drm_mm_node_allocated(&vma->node)) |
||
3263 | continue; |
||
2332 | Serge | 3264 | |
6084 | serge | 3265 | if (vma->pin_count) { |
3266 | DRM_DEBUG("can not change the cache level of pinned objects\n"); |
||
3267 | return -EBUSY; |
||
3268 | } |
||
3269 | |||
5354 | serge | 3270 | if (!i915_gem_valid_gtt_space(vma, cache_level)) { |
4104 | Serge | 3271 | ret = i915_vma_unbind(vma); |
6084 | serge | 3272 | if (ret) |
3273 | return ret; |
||
3274 | } else |
||
3275 | bound = true; |
||
3031 | serge | 3276 | } |
3277 | |||
6084 | serge | 3278 | /* We can reuse the existing drm_mm nodes but need to change the |
3279 | * cache-level on the PTE. We could simply unbind them all and |
||
3280 | * rebind with the correct cache-level on next use. However since |
||
3281 | * we already have a valid slot, dma mapping, pages etc, we may as |
||
3282 | * rewrite the PTE in the belief that doing so tramples upon less |
||
3283 | * state and so involves less work. |
||
3284 | */ |
||
3285 | if (bound) { |
||
3286 | /* Before we change the PTE, the GPU must not be accessing it. |
||
3287 | * If we wait upon the object, we know that all the bound |
||
3288 | * VMA are no longer active. |
||
3289 | */ |
||
3290 | ret = i915_gem_object_wait_rendering(obj, false); |
||
2335 | Serge | 3291 | if (ret) |
3292 | return ret; |
||
2332 | Serge | 3293 | |
6084 | serge | 3294 | if (!HAS_LLC(dev) && cache_level != I915_CACHE_NONE) { |
3295 | /* Access to snoopable pages through the GTT is |
||
3296 | * incoherent and on some machines causes a hard |
||
3297 | * lockup. Relinquish the CPU mmaping to force |
||
3298 | * userspace to refault in the pages and we can |
||
3299 | * then double check if the GTT mapping is still |
||
3300 | * valid for that pointer access. |
||
3301 | */ |
||
3302 | i915_gem_release_mmap(obj); |
||
2332 | Serge | 3303 | |
6084 | serge | 3304 | /* As we no longer need a fence for GTT access, |
3305 | * we can relinquish it now (and so prevent having |
||
3306 | * to steal a fence from someone else on the next |
||
3307 | * fence request). Note GPU activity would have |
||
3308 | * dropped the fence as all snoopable access is |
||
3309 | * supposed to be linear. |
||
3310 | */ |
||
2335 | Serge | 3311 | ret = i915_gem_object_put_fence(obj); |
3312 | if (ret) |
||
3313 | return ret; |
||
6084 | serge | 3314 | } else { |
3315 | /* We either have incoherent backing store and |
||
3316 | * so no GTT access or the architecture is fully |
||
3317 | * coherent. In such cases, existing GTT mmaps |
||
3318 | * ignore the cache bit in the PTE and we can |
||
3319 | * rewrite it without confusing the GPU or having |
||
3320 | * to force userspace to fault back in its mmaps. |
||
3321 | */ |
||
3322 | } |
||
2332 | Serge | 3323 | |
6084 | serge | 3324 | list_for_each_entry(vma, &obj->vma_list, vma_link) { |
3325 | if (!drm_mm_node_allocated(&vma->node)) |
||
3326 | continue; |
||
3327 | |||
3328 | ret = i915_vma_bind(vma, cache_level, PIN_UPDATE); |
||
3329 | if (ret) |
||
3330 | return ret; |
||
3331 | } |
||
2335 | Serge | 3332 | } |
2332 | Serge | 3333 | |
4104 | Serge | 3334 | list_for_each_entry(vma, &obj->vma_list, vma_link) |
3335 | vma->node.color = cache_level; |
||
3336 | obj->cache_level = cache_level; |
||
3337 | |||
6084 | serge | 3338 | out: |
3339 | /* Flush the dirty CPU caches to the backing storage so that the |
||
3340 | * object is now coherent at its new cache level (with respect |
||
3341 | * to the access domain). |
||
3342 | */ |
||
3343 | if (obj->cache_dirty && |
||
3344 | obj->base.write_domain != I915_GEM_DOMAIN_CPU && |
||
3345 | cpu_write_needs_clflush(obj)) { |
||
3346 | if (i915_gem_clflush_object(obj, true)) |
||
3347 | i915_gem_chipset_flush(obj->base.dev); |
||
3348 | } |
||
2332 | Serge | 3349 | |
2335 | Serge | 3350 | return 0; |
3351 | } |
||
2332 | Serge | 3352 | |
3260 | Serge | 3353 | int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data, |
3354 | struct drm_file *file) |
||
3355 | { |
||
3356 | struct drm_i915_gem_caching *args = data; |
||
3357 | struct drm_i915_gem_object *obj; |
||
3358 | |||
3359 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
||
6084 | serge | 3360 | if (&obj->base == NULL) |
3361 | return -ENOENT; |
||
3260 | Serge | 3362 | |
4104 | Serge | 3363 | switch (obj->cache_level) { |
3364 | case I915_CACHE_LLC: |
||
3365 | case I915_CACHE_L3_LLC: |
||
3366 | args->caching = I915_CACHING_CACHED; |
||
3367 | break; |
||
3260 | Serge | 3368 | |
4104 | Serge | 3369 | case I915_CACHE_WT: |
3370 | args->caching = I915_CACHING_DISPLAY; |
||
3371 | break; |
||
3372 | |||
3373 | default: |
||
3374 | args->caching = I915_CACHING_NONE; |
||
3375 | break; |
||
3376 | } |
||
3377 | |||
6084 | serge | 3378 | drm_gem_object_unreference_unlocked(&obj->base); |
3379 | return 0; |
||
3260 | Serge | 3380 | } |
3381 | |||
3382 | int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data, |
||
3383 | struct drm_file *file) |
||
3384 | { |
||
6084 | serge | 3385 | struct drm_i915_private *dev_priv = dev->dev_private; |
3260 | Serge | 3386 | struct drm_i915_gem_caching *args = data; |
3387 | struct drm_i915_gem_object *obj; |
||
3388 | enum i915_cache_level level; |
||
3389 | int ret; |
||
3390 | |||
3391 | switch (args->caching) { |
||
3392 | case I915_CACHING_NONE: |
||
3393 | level = I915_CACHE_NONE; |
||
3394 | break; |
||
3395 | case I915_CACHING_CACHED: |
||
6084 | serge | 3396 | /* |
3397 | * Due to a HW issue on BXT A stepping, GPU stores via a |
||
3398 | * snooped mapping may leave stale data in a corresponding CPU |
||
3399 | * cacheline, whereas normally such cachelines would get |
||
3400 | * invalidated. |
||
3401 | */ |
||
3402 | if (IS_BROXTON(dev) && INTEL_REVID(dev) < BXT_REVID_B0) |
||
3403 | return -ENODEV; |
||
3404 | |||
3260 | Serge | 3405 | level = I915_CACHE_LLC; |
3406 | break; |
||
4104 | Serge | 3407 | case I915_CACHING_DISPLAY: |
3408 | level = HAS_WT(dev) ? I915_CACHE_WT : I915_CACHE_NONE; |
||
3409 | break; |
||
3260 | Serge | 3410 | default: |
3411 | return -EINVAL; |
||
3412 | } |
||
3413 | |||
6084 | serge | 3414 | intel_runtime_pm_get(dev_priv); |
3415 | |||
3260 | Serge | 3416 | ret = i915_mutex_lock_interruptible(dev); |
3417 | if (ret) |
||
6084 | serge | 3418 | goto rpm_put; |
3260 | Serge | 3419 | |
3420 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
||
3421 | if (&obj->base == NULL) { |
||
3422 | ret = -ENOENT; |
||
3423 | goto unlock; |
||
3424 | } |
||
3425 | |||
3426 | ret = i915_gem_object_set_cache_level(obj, level); |
||
3427 | |||
3428 | drm_gem_object_unreference(&obj->base); |
||
3429 | unlock: |
||
3430 | mutex_unlock(&dev->struct_mutex); |
||
6084 | serge | 3431 | rpm_put: |
3432 | intel_runtime_pm_put(dev_priv); |
||
3433 | |||
3260 | Serge | 3434 | return ret; |
3435 | } |
||
3436 | |||
2335 | Serge | 3437 | /* |
3438 | * Prepare buffer for display plane (scanout, cursors, etc). |
||
3439 | * Can be called from an uninterruptible phase (modesetting) and allows |
||
3440 | * any flushes to be pipelined (for pageflips). |
||
3441 | */ |
||
3442 | int |
||
3443 | i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, |
||
3444 | u32 alignment, |
||
6084 | serge | 3445 | struct intel_engine_cs *pipelined, |
3446 | struct drm_i915_gem_request **pipelined_request, |
||
3447 | const struct i915_ggtt_view *view) |
||
2335 | Serge | 3448 | { |
3449 | u32 old_read_domains, old_write_domain; |
||
3450 | int ret; |
||
2332 | Serge | 3451 | |
6084 | serge | 3452 | ret = i915_gem_object_sync(obj, pipelined, pipelined_request); |
2335 | Serge | 3453 | if (ret) |
3454 | return ret; |
||
2332 | Serge | 3455 | |
4104 | Serge | 3456 | /* Mark the pin_display early so that we account for the |
3457 | * display coherency whilst setting up the cache domains. |
||
3458 | */ |
||
6084 | serge | 3459 | obj->pin_display++; |
4104 | Serge | 3460 | |
2335 | Serge | 3461 | /* The display engine is not coherent with the LLC cache on gen6. As |
3462 | * a result, we make sure that the pinning that is about to occur is |
||
3463 | * done with uncached PTEs. This is lowest common denominator for all |
||
3464 | * chipsets. |
||
3465 | * |
||
3466 | * However for gen6+, we could do better by using the GFDT bit instead |
||
3467 | * of uncaching, which would allow us to flush all the LLC-cached data |
||
3468 | * with that bit in the PTE to main memory with just one PIPE_CONTROL. |
||
3469 | */ |
||
4104 | Serge | 3470 | ret = i915_gem_object_set_cache_level(obj, |
3471 | HAS_WT(obj->base.dev) ? I915_CACHE_WT : I915_CACHE_NONE); |
||
2360 | Serge | 3472 | if (ret) |
4104 | Serge | 3473 | goto err_unpin_display; |
2332 | Serge | 3474 | |
2335 | Serge | 3475 | /* As the user may map the buffer once pinned in the display plane |
3476 | * (e.g. libkms for the bootup splash), we have to ensure that we |
||
3477 | * always use map_and_fenceable for all scanout buffers. |
||
3478 | */ |
||
6084 | serge | 3479 | ret = i915_gem_object_ggtt_pin(obj, view, alignment, |
3480 | view->type == I915_GGTT_VIEW_NORMAL ? |
||
3481 | PIN_MAPPABLE : 0); |
||
2335 | Serge | 3482 | if (ret) |
4104 | Serge | 3483 | goto err_unpin_display; |
2332 | Serge | 3484 | |
6084 | serge | 3485 | i915_gem_object_flush_cpu_write_domain(obj); |
2332 | Serge | 3486 | |
2335 | Serge | 3487 | old_write_domain = obj->base.write_domain; |
3488 | old_read_domains = obj->base.read_domains; |
||
2332 | Serge | 3489 | |
2335 | Serge | 3490 | /* It should now be out of any other write domains, and we can update |
3491 | * the domain values for our changes. |
||
3492 | */ |
||
3031 | serge | 3493 | obj->base.write_domain = 0; |
2335 | Serge | 3494 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; |
2332 | Serge | 3495 | |
2351 | Serge | 3496 | trace_i915_gem_object_change_domain(obj, |
3497 | old_read_domains, |
||
3498 | old_write_domain); |
||
2332 | Serge | 3499 | |
2335 | Serge | 3500 | return 0; |
4104 | Serge | 3501 | |
3502 | err_unpin_display: |
||
6084 | serge | 3503 | obj->pin_display--; |
4104 | Serge | 3504 | return ret; |
2335 | Serge | 3505 | } |
2332 | Serge | 3506 | |
4104 | Serge | 3507 | void |
6084 | serge | 3508 | i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object *obj, |
3509 | const struct i915_ggtt_view *view) |
||
4104 | Serge | 3510 | { |
6084 | serge | 3511 | if (WARN_ON(obj->pin_display == 0)) |
3512 | return; |
||
4104 | Serge | 3513 | |
6084 | serge | 3514 | i915_gem_object_ggtt_unpin_view(obj, view); |
2332 | Serge | 3515 | |
6084 | serge | 3516 | obj->pin_display--; |
2344 | Serge | 3517 | } |
2332 | Serge | 3518 | |
2344 | Serge | 3519 | /** |
3520 | * Moves a single object to the CPU read, and possibly write domain. |
||
3521 | * |
||
3522 | * This function returns when the move is complete, including waiting on |
||
3523 | * flushes to occur. |
||
3524 | */ |
||
3031 | serge | 3525 | int |
2344 | Serge | 3526 | i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write) |
3527 | { |
||
3528 | uint32_t old_write_domain, old_read_domains; |
||
3529 | int ret; |
||
2332 | Serge | 3530 | |
2344 | Serge | 3531 | if (obj->base.write_domain == I915_GEM_DOMAIN_CPU) |
3532 | return 0; |
||
2332 | Serge | 3533 | |
3031 | serge | 3534 | ret = i915_gem_object_wait_rendering(obj, !write); |
2344 | Serge | 3535 | if (ret) |
3536 | return ret; |
||
2332 | Serge | 3537 | |
2344 | Serge | 3538 | i915_gem_object_flush_gtt_write_domain(obj); |
2332 | Serge | 3539 | |
2344 | Serge | 3540 | old_write_domain = obj->base.write_domain; |
3541 | old_read_domains = obj->base.read_domains; |
||
2332 | Serge | 3542 | |
2344 | Serge | 3543 | /* Flush the CPU cache if it's still invalid. */ |
3544 | if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) { |
||
4104 | Serge | 3545 | i915_gem_clflush_object(obj, false); |
2332 | Serge | 3546 | |
2344 | Serge | 3547 | obj->base.read_domains |= I915_GEM_DOMAIN_CPU; |
3548 | } |
||
2332 | Serge | 3549 | |
2344 | Serge | 3550 | /* It should now be out of any other write domains, and we can update |
3551 | * the domain values for our changes. |
||
3552 | */ |
||
3553 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) != 0); |
||
2332 | Serge | 3554 | |
2344 | Serge | 3555 | /* If we're writing through the CPU, then the GPU read domains will |
3556 | * need to be invalidated at next use. |
||
3557 | */ |
||
3558 | if (write) { |
||
3559 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; |
||
3560 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
||
3561 | } |
||
2332 | Serge | 3562 | |
2351 | Serge | 3563 | trace_i915_gem_object_change_domain(obj, |
3564 | old_read_domains, |
||
3565 | old_write_domain); |
||
2332 | Serge | 3566 | |
2344 | Serge | 3567 | return 0; |
3568 | } |
||
2332 | Serge | 3569 | |
3031 | serge | 3570 | /* Throttle our rendering by waiting until the ring has completed our requests |
3571 | * emitted over 20 msec ago. |
||
2344 | Serge | 3572 | * |
3031 | serge | 3573 | * Note that if we were to use the current jiffies each time around the loop, |
3574 | * we wouldn't escape the function with any frames outstanding if the time to |
||
3575 | * render a frame was over 20ms. |
||
3576 | * |
||
3577 | * This should get us reasonable parallelism between CPU and GPU but also |
||
3578 | * relatively low latency when blocking on a particular request to finish. |
||
2344 | Serge | 3579 | */ |
3031 | serge | 3580 | static int |
3581 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file) |
||
2344 | Serge | 3582 | { |
3031 | serge | 3583 | struct drm_i915_private *dev_priv = dev->dev_private; |
3584 | struct drm_i915_file_private *file_priv = file->driver_priv; |
||
6084 | serge | 3585 | unsigned long recent_enough = jiffies - DRM_I915_THROTTLE_JIFFIES; |
3586 | struct drm_i915_gem_request *request, *target = NULL; |
||
3480 | Serge | 3587 | unsigned reset_counter; |
3031 | serge | 3588 | int ret; |
2332 | Serge | 3589 | |
3480 | Serge | 3590 | ret = i915_gem_wait_for_error(&dev_priv->gpu_error); |
3591 | if (ret) |
||
3592 | return ret; |
||
2332 | Serge | 3593 | |
3480 | Serge | 3594 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, false); |
3595 | if (ret) |
||
3596 | return ret; |
||
3597 | |||
3031 | serge | 3598 | spin_lock(&file_priv->mm.lock); |
3599 | list_for_each_entry(request, &file_priv->mm.request_list, client_list) { |
||
3600 | if (time_after_eq(request->emitted_jiffies, recent_enough)) |
||
3601 | break; |
||
2332 | Serge | 3602 | |
6084 | serge | 3603 | /* |
3604 | * Note that the request might not have been submitted yet. |
||
3605 | * In which case emitted_jiffies will be zero. |
||
3606 | */ |
||
3607 | if (!request->emitted_jiffies) |
||
3608 | continue; |
||
3609 | |||
3610 | target = request; |
||
3031 | serge | 3611 | } |
3480 | Serge | 3612 | reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); |
6084 | serge | 3613 | if (target) |
3614 | i915_gem_request_reference(target); |
||
3031 | serge | 3615 | spin_unlock(&file_priv->mm.lock); |
2332 | Serge | 3616 | |
6084 | serge | 3617 | if (target == NULL) |
3031 | serge | 3618 | return 0; |
2332 | Serge | 3619 | |
6084 | serge | 3620 | ret = __i915_wait_request(target, reset_counter, true, NULL, NULL); |
3031 | serge | 3621 | if (ret == 0) |
3622 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, 0); |
||
2332 | Serge | 3623 | |
6084 | serge | 3624 | i915_gem_request_unreference__unlocked(target); |
3625 | |||
3031 | serge | 3626 | return ret; |
2352 | Serge | 3627 | } |
2332 | Serge | 3628 | |
5060 | serge | 3629 | static bool |
3630 | i915_vma_misplaced(struct i915_vma *vma, uint32_t alignment, uint64_t flags) |
||
3631 | { |
||
3632 | struct drm_i915_gem_object *obj = vma->obj; |
||
3633 | |||
3634 | if (alignment && |
||
3635 | vma->node.start & (alignment - 1)) |
||
3636 | return true; |
||
3637 | |||
3638 | if (flags & PIN_MAPPABLE && !obj->map_and_fenceable) |
||
3639 | return true; |
||
3640 | |||
3641 | if (flags & PIN_OFFSET_BIAS && |
||
3642 | vma->node.start < (flags & PIN_OFFSET_MASK)) |
||
3643 | return true; |
||
3644 | |||
3645 | return false; |
||
3646 | } |
||
3647 | |||
6084 | serge | 3648 | void __i915_vma_set_map_and_fenceable(struct i915_vma *vma) |
2332 | Serge | 3649 | { |
6084 | serge | 3650 | struct drm_i915_gem_object *obj = vma->obj; |
3651 | bool mappable, fenceable; |
||
3652 | u32 fence_size, fence_alignment; |
||
3653 | |||
3654 | fence_size = i915_gem_get_gtt_size(obj->base.dev, |
||
3655 | obj->base.size, |
||
3656 | obj->tiling_mode); |
||
3657 | fence_alignment = i915_gem_get_gtt_alignment(obj->base.dev, |
||
3658 | obj->base.size, |
||
3659 | obj->tiling_mode, |
||
3660 | true); |
||
3661 | |||
3662 | fenceable = (vma->node.size == fence_size && |
||
3663 | (vma->node.start & (fence_alignment - 1)) == 0); |
||
3664 | |||
3665 | mappable = (vma->node.start + fence_size <= |
||
3666 | to_i915(obj->base.dev)->gtt.mappable_end); |
||
3667 | |||
3668 | obj->map_and_fenceable = mappable && fenceable; |
||
3669 | } |
||
3670 | |||
3671 | static int |
||
3672 | i915_gem_object_do_pin(struct drm_i915_gem_object *obj, |
||
3673 | struct i915_address_space *vm, |
||
3674 | const struct i915_ggtt_view *ggtt_view, |
||
3675 | uint32_t alignment, |
||
3676 | uint64_t flags) |
||
3677 | { |
||
5060 | serge | 3678 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
4104 | Serge | 3679 | struct i915_vma *vma; |
5354 | serge | 3680 | unsigned bound; |
2332 | Serge | 3681 | int ret; |
3682 | |||
5060 | serge | 3683 | if (WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base)) |
3684 | return -ENODEV; |
||
2332 | Serge | 3685 | |
5060 | serge | 3686 | if (WARN_ON(flags & (PIN_GLOBAL | PIN_MAPPABLE) && !i915_is_ggtt(vm))) |
3687 | return -EINVAL; |
||
4104 | Serge | 3688 | |
5354 | serge | 3689 | if (WARN_ON((flags & (PIN_MAPPABLE | PIN_GLOBAL)) == PIN_MAPPABLE)) |
3690 | return -EINVAL; |
||
3691 | |||
6084 | serge | 3692 | if (WARN_ON(i915_is_ggtt(vm) != !!ggtt_view)) |
3693 | return -EINVAL; |
||
3694 | |||
3695 | vma = ggtt_view ? i915_gem_obj_to_ggtt_view(obj, ggtt_view) : |
||
3696 | i915_gem_obj_to_vma(obj, vm); |
||
3697 | |||
3698 | if (IS_ERR(vma)) |
||
3699 | return PTR_ERR(vma); |
||
3700 | |||
5060 | serge | 3701 | if (vma) { |
3702 | if (WARN_ON(vma->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT)) |
||
3703 | return -EBUSY; |
||
4104 | Serge | 3704 | |
5060 | serge | 3705 | if (i915_vma_misplaced(vma, alignment, flags)) { |
3706 | WARN(vma->pin_count, |
||
6084 | serge | 3707 | "bo is already pinned in %s with incorrect alignment:" |
3708 | " offset=%08x %08x, req.alignment=%x, req.map_and_fenceable=%d," |
||
2332 | Serge | 3709 | " obj->map_and_fenceable=%d\n", |
6084 | serge | 3710 | ggtt_view ? "ggtt" : "ppgtt", |
3711 | upper_32_bits(vma->node.start), |
||
3712 | lower_32_bits(vma->node.start), |
||
3713 | alignment, |
||
5060 | serge | 3714 | !!(flags & PIN_MAPPABLE), |
2332 | Serge | 3715 | obj->map_and_fenceable); |
4104 | Serge | 3716 | ret = i915_vma_unbind(vma); |
2332 | Serge | 3717 | if (ret) |
3718 | return ret; |
||
5060 | serge | 3719 | |
3720 | vma = NULL; |
||
2332 | Serge | 3721 | } |
3722 | } |
||
3723 | |||
5354 | serge | 3724 | bound = vma ? vma->bound : 0; |
5060 | serge | 3725 | if (vma == NULL || !drm_mm_node_allocated(&vma->node)) { |
6084 | serge | 3726 | vma = i915_gem_object_bind_to_vm(obj, vm, ggtt_view, alignment, |
3727 | flags); |
||
5060 | serge | 3728 | if (IS_ERR(vma)) |
3729 | return PTR_ERR(vma); |
||
6084 | serge | 3730 | } else { |
3731 | ret = i915_vma_bind(vma, obj->cache_level, flags); |
||
3732 | if (ret) |
||
3733 | return ret; |
||
2332 | Serge | 3734 | } |
3735 | |||
6084 | serge | 3736 | if (ggtt_view && ggtt_view->type == I915_GGTT_VIEW_NORMAL && |
3737 | (bound ^ vma->bound) & GLOBAL_BIND) { |
||
3738 | __i915_vma_set_map_and_fenceable(vma); |
||
3739 | WARN_ON(flags & PIN_MAPPABLE && !obj->map_and_fenceable); |
||
5354 | serge | 3740 | } |
3741 | |||
5060 | serge | 3742 | vma->pin_count++; |
2332 | Serge | 3743 | return 0; |
3744 | } |
||
3745 | |||
6084 | serge | 3746 | int |
3747 | i915_gem_object_pin(struct drm_i915_gem_object *obj, |
||
3748 | struct i915_address_space *vm, |
||
3749 | uint32_t alignment, |
||
3750 | uint64_t flags) |
||
2344 | Serge | 3751 | { |
6084 | serge | 3752 | return i915_gem_object_do_pin(obj, vm, |
3753 | i915_is_ggtt(vm) ? &i915_ggtt_view_normal : NULL, |
||
3754 | alignment, flags); |
||
2344 | Serge | 3755 | } |
2332 | Serge | 3756 | |
6084 | serge | 3757 | int |
3758 | i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj, |
||
3759 | const struct i915_ggtt_view *view, |
||
3760 | uint32_t alignment, |
||
3761 | uint64_t flags) |
||
5060 | serge | 3762 | { |
6084 | serge | 3763 | if (WARN_ONCE(!view, "no view specified")) |
3764 | return -EINVAL; |
||
5060 | serge | 3765 | |
6084 | serge | 3766 | return i915_gem_object_do_pin(obj, i915_obj_to_ggtt(obj), view, |
3767 | alignment, flags | PIN_GLOBAL); |
||
5060 | serge | 3768 | } |
3769 | |||
3770 | void |
||
6084 | serge | 3771 | i915_gem_object_ggtt_unpin_view(struct drm_i915_gem_object *obj, |
3772 | const struct i915_ggtt_view *view) |
||
5060 | serge | 3773 | { |
6084 | serge | 3774 | struct i915_vma *vma = i915_gem_obj_to_ggtt_view(obj, view); |
5060 | serge | 3775 | |
6084 | serge | 3776 | BUG_ON(!vma); |
3777 | WARN_ON(vma->pin_count == 0); |
||
3778 | WARN_ON(!i915_gem_obj_ggtt_bound_view(obj, view)); |
||
2332 | Serge | 3779 | |
6084 | serge | 3780 | --vma->pin_count; |
3031 | serge | 3781 | } |
2332 | Serge | 3782 | |
3031 | serge | 3783 | int |
3784 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, |
||
3785 | struct drm_file *file) |
||
3786 | { |
||
3787 | struct drm_i915_gem_busy *args = data; |
||
3788 | struct drm_i915_gem_object *obj; |
||
3789 | int ret; |
||
2332 | Serge | 3790 | |
3031 | serge | 3791 | ret = i915_mutex_lock_interruptible(dev); |
3792 | if (ret) |
||
3793 | return ret; |
||
2332 | Serge | 3794 | |
5060 | serge | 3795 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
3031 | serge | 3796 | if (&obj->base == NULL) { |
3797 | ret = -ENOENT; |
||
3798 | goto unlock; |
||
3799 | } |
||
2332 | Serge | 3800 | |
3031 | serge | 3801 | /* Count all active objects as busy, even if they are currently not used |
3802 | * by the gpu. Users of this interface expect objects to eventually |
||
3803 | * become non-busy without any further actions, therefore emit any |
||
3804 | * necessary flushes here. |
||
3805 | */ |
||
3806 | ret = i915_gem_object_flush_active(obj); |
||
6084 | serge | 3807 | if (ret) |
3808 | goto unref; |
||
2332 | Serge | 3809 | |
6084 | serge | 3810 | BUILD_BUG_ON(I915_NUM_RINGS > 16); |
3811 | args->busy = obj->active << 16; |
||
3812 | if (obj->last_write_req) |
||
3813 | args->busy |= obj->last_write_req->ring->id; |
||
2332 | Serge | 3814 | |
6084 | serge | 3815 | unref: |
3031 | serge | 3816 | drm_gem_object_unreference(&obj->base); |
3817 | unlock: |
||
3818 | mutex_unlock(&dev->struct_mutex); |
||
3819 | return ret; |
||
3820 | } |
||
2332 | Serge | 3821 | |
3031 | serge | 3822 | int |
3823 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, |
||
3824 | struct drm_file *file_priv) |
||
3825 | { |
||
3826 | return i915_gem_ring_throttle(dev, file_priv); |
||
3827 | } |
||
2332 | Serge | 3828 | |
3263 | Serge | 3829 | #if 0 |
3830 | |||
3031 | serge | 3831 | int |
3832 | i915_gem_madvise_ioctl(struct drm_device *dev, void *data, |
||
3833 | struct drm_file *file_priv) |
||
3834 | { |
||
5354 | serge | 3835 | struct drm_i915_private *dev_priv = dev->dev_private; |
3031 | serge | 3836 | struct drm_i915_gem_madvise *args = data; |
3837 | struct drm_i915_gem_object *obj; |
||
3838 | int ret; |
||
2332 | Serge | 3839 | |
3031 | serge | 3840 | switch (args->madv) { |
3841 | case I915_MADV_DONTNEED: |
||
3842 | case I915_MADV_WILLNEED: |
||
3843 | break; |
||
3844 | default: |
||
3845 | return -EINVAL; |
||
3846 | } |
||
2332 | Serge | 3847 | |
3031 | serge | 3848 | ret = i915_mutex_lock_interruptible(dev); |
3849 | if (ret) |
||
3850 | return ret; |
||
2332 | Serge | 3851 | |
3031 | serge | 3852 | obj = to_intel_bo(drm_gem_object_lookup(dev, file_priv, args->handle)); |
3853 | if (&obj->base == NULL) { |
||
3854 | ret = -ENOENT; |
||
3855 | goto unlock; |
||
3856 | } |
||
2332 | Serge | 3857 | |
5060 | serge | 3858 | if (i915_gem_obj_is_pinned(obj)) { |
3031 | serge | 3859 | ret = -EINVAL; |
3860 | goto out; |
||
3861 | } |
||
2332 | Serge | 3862 | |
5354 | serge | 3863 | if (obj->pages && |
3864 | obj->tiling_mode != I915_TILING_NONE && |
||
3865 | dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) { |
||
3866 | if (obj->madv == I915_MADV_WILLNEED) |
||
3867 | i915_gem_object_unpin_pages(obj); |
||
3868 | if (args->madv == I915_MADV_WILLNEED) |
||
3869 | i915_gem_object_pin_pages(obj); |
||
3870 | } |
||
3871 | |||
3031 | serge | 3872 | if (obj->madv != __I915_MADV_PURGED) |
3873 | obj->madv = args->madv; |
||
2332 | Serge | 3874 | |
3031 | serge | 3875 | /* if the object is no longer attached, discard its backing storage */ |
6084 | serge | 3876 | if (obj->madv == I915_MADV_DONTNEED && obj->pages == NULL) |
3031 | serge | 3877 | i915_gem_object_truncate(obj); |
2332 | Serge | 3878 | |
3031 | serge | 3879 | args->retained = obj->madv != __I915_MADV_PURGED; |
2332 | Serge | 3880 | |
3031 | serge | 3881 | out: |
3882 | drm_gem_object_unreference(&obj->base); |
||
3883 | unlock: |
||
3884 | mutex_unlock(&dev->struct_mutex); |
||
3885 | return ret; |
||
3886 | } |
||
3887 | #endif |
||
2332 | Serge | 3888 | |
3031 | serge | 3889 | void i915_gem_object_init(struct drm_i915_gem_object *obj, |
3890 | const struct drm_i915_gem_object_ops *ops) |
||
3891 | { |
||
6084 | serge | 3892 | int i; |
3893 | |||
4104 | Serge | 3894 | INIT_LIST_HEAD(&obj->global_list); |
6084 | serge | 3895 | for (i = 0; i < I915_NUM_RINGS; i++) |
3896 | INIT_LIST_HEAD(&obj->ring_list[i]); |
||
4104 | Serge | 3897 | INIT_LIST_HEAD(&obj->obj_exec_link); |
3898 | INIT_LIST_HEAD(&obj->vma_list); |
||
6084 | serge | 3899 | INIT_LIST_HEAD(&obj->batch_pool_link); |
2332 | Serge | 3900 | |
3031 | serge | 3901 | obj->ops = ops; |
3902 | |||
3903 | obj->fence_reg = I915_FENCE_REG_NONE; |
||
3904 | obj->madv = I915_MADV_WILLNEED; |
||
3905 | |||
3906 | i915_gem_info_add_obj(obj->base.dev->dev_private, obj->base.size); |
||
3907 | } |
||
3908 | |||
3909 | static const struct drm_i915_gem_object_ops i915_gem_object_ops = { |
||
3910 | .get_pages = i915_gem_object_get_pages_gtt, |
||
3911 | .put_pages = i915_gem_object_put_pages_gtt, |
||
3912 | }; |
||
3913 | |||
2332 | Serge | 3914 | struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev, |
3915 | size_t size) |
||
3916 | { |
||
3917 | struct drm_i915_gem_object *obj; |
||
3031 | serge | 3918 | struct address_space *mapping; |
3480 | Serge | 3919 | gfp_t mask; |
2340 | Serge | 3920 | |
3746 | Serge | 3921 | obj = i915_gem_object_alloc(dev); |
2332 | Serge | 3922 | if (obj == NULL) |
3923 | return NULL; |
||
3924 | |||
3925 | if (drm_gem_object_init(dev, &obj->base, size) != 0) { |
||
4104 | Serge | 3926 | i915_gem_object_free(obj); |
2332 | Serge | 3927 | return NULL; |
3928 | } |
||
3929 | |||
3930 | |||
3031 | serge | 3931 | i915_gem_object_init(obj, &i915_gem_object_ops); |
2332 | Serge | 3932 | |
3933 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
||
3934 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; |
||
3935 | |||
3031 | serge | 3936 | if (HAS_LLC(dev)) { |
3937 | /* On some devices, we can have the GPU use the LLC (the CPU |
||
2332 | Serge | 3938 | * cache) for about a 10% performance improvement |
3939 | * compared to uncached. Graphics requests other than |
||
3940 | * display scanout are coherent with the CPU in |
||
3941 | * accessing this cache. This means in this mode we |
||
3942 | * don't need to clflush on the CPU side, and on the |
||
3943 | * GPU side we only need to flush internal caches to |
||
3944 | * get data visible to the CPU. |
||
3945 | * |
||
3946 | * However, we maintain the display planes as UC, and so |
||
3947 | * need to rebind when first used as such. |
||
3948 | */ |
||
3949 | obj->cache_level = I915_CACHE_LLC; |
||
3950 | } else |
||
3951 | obj->cache_level = I915_CACHE_NONE; |
||
3952 | |||
4560 | Serge | 3953 | trace_i915_gem_object_create(obj); |
3954 | |||
2332 | Serge | 3955 | return obj; |
3956 | } |
||
3957 | |||
3031 | serge | 3958 | void i915_gem_free_object(struct drm_gem_object *gem_obj) |
2344 | Serge | 3959 | { |
3031 | serge | 3960 | struct drm_i915_gem_object *obj = to_intel_bo(gem_obj); |
2344 | Serge | 3961 | struct drm_device *dev = obj->base.dev; |
5060 | serge | 3962 | struct drm_i915_private *dev_priv = dev->dev_private; |
4104 | Serge | 3963 | struct i915_vma *vma, *next; |
2332 | Serge | 3964 | |
4560 | Serge | 3965 | intel_runtime_pm_get(dev_priv); |
3966 | |||
3031 | serge | 3967 | trace_i915_gem_object_destroy(obj); |
3968 | |||
5060 | serge | 3969 | list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) { |
3970 | int ret; |
||
3031 | serge | 3971 | |
5060 | serge | 3972 | vma->pin_count = 0; |
3973 | ret = i915_vma_unbind(vma); |
||
4104 | Serge | 3974 | if (WARN_ON(ret == -ERESTARTSYS)) { |
6084 | serge | 3975 | bool was_interruptible; |
3031 | serge | 3976 | |
6084 | serge | 3977 | was_interruptible = dev_priv->mm.interruptible; |
3978 | dev_priv->mm.interruptible = false; |
||
3031 | serge | 3979 | |
4104 | Serge | 3980 | WARN_ON(i915_vma_unbind(vma)); |
3031 | serge | 3981 | |
6084 | serge | 3982 | dev_priv->mm.interruptible = was_interruptible; |
3983 | } |
||
2344 | Serge | 3984 | } |
2332 | Serge | 3985 | |
4104 | Serge | 3986 | /* Stolen objects don't hold a ref, but do hold pin count. Fix that up |
3987 | * before progressing. */ |
||
3988 | if (obj->stolen) |
||
3989 | i915_gem_object_unpin_pages(obj); |
||
3990 | |||
5060 | serge | 3991 | WARN_ON(obj->frontbuffer_bits); |
3992 | |||
5354 | serge | 3993 | if (obj->pages && obj->madv == I915_MADV_WILLNEED && |
3994 | dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES && |
||
3995 | obj->tiling_mode != I915_TILING_NONE) |
||
3996 | i915_gem_object_unpin_pages(obj); |
||
3997 | |||
4104 | Serge | 3998 | if (WARN_ON(obj->pages_pin_count)) |
6084 | serge | 3999 | obj->pages_pin_count = 0; |
3031 | serge | 4000 | i915_gem_object_put_pages(obj); |
4001 | // i915_gem_object_free_mmap_offset(obj); |
||
2332 | Serge | 4002 | |
3243 | Serge | 4003 | BUG_ON(obj->pages); |
2332 | Serge | 4004 | |
3031 | serge | 4005 | |
3290 | Serge | 4006 | if(obj->base.filp != NULL) |
4007 | { |
||
3298 | Serge | 4008 | // printf("filp %p\n", obj->base.filp); |
3290 | Serge | 4009 | shmem_file_delete(obj->base.filp); |
4010 | } |
||
4011 | |||
2344 | Serge | 4012 | drm_gem_object_release(&obj->base); |
4013 | i915_gem_info_remove_obj(dev_priv, obj->base.size); |
||
2332 | Serge | 4014 | |
2344 | Serge | 4015 | kfree(obj->bit_17); |
4104 | Serge | 4016 | i915_gem_object_free(obj); |
4560 | Serge | 4017 | |
4018 | intel_runtime_pm_put(dev_priv); |
||
2344 | Serge | 4019 | } |
2332 | Serge | 4020 | |
4560 | Serge | 4021 | struct i915_vma *i915_gem_obj_to_vma(struct drm_i915_gem_object *obj, |
4104 | Serge | 4022 | struct i915_address_space *vm) |
4023 | { |
||
4560 | Serge | 4024 | struct i915_vma *vma; |
6084 | serge | 4025 | list_for_each_entry(vma, &obj->vma_list, vma_link) { |
4026 | if (i915_is_ggtt(vma->vm) && |
||
4027 | vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) |
||
4028 | continue; |
||
4560 | Serge | 4029 | if (vma->vm == vm) |
4030 | return vma; |
||
6084 | serge | 4031 | } |
4032 | return NULL; |
||
4033 | } |
||
4560 | Serge | 4034 | |
6084 | serge | 4035 | struct i915_vma *i915_gem_obj_to_ggtt_view(struct drm_i915_gem_object *obj, |
4036 | const struct i915_ggtt_view *view) |
||
4037 | { |
||
4038 | struct i915_address_space *ggtt = i915_obj_to_ggtt(obj); |
||
4039 | struct i915_vma *vma; |
||
4040 | |||
4041 | if (WARN_ONCE(!view, "no view specified")) |
||
4042 | return ERR_PTR(-EINVAL); |
||
4043 | |||
4044 | list_for_each_entry(vma, &obj->vma_list, vma_link) |
||
4045 | if (vma->vm == ggtt && |
||
4046 | i915_ggtt_view_equal(&vma->ggtt_view, view)) |
||
4047 | return vma; |
||
4560 | Serge | 4048 | return NULL; |
4049 | } |
||
4050 | |||
4104 | Serge | 4051 | void i915_gem_vma_destroy(struct i915_vma *vma) |
4052 | { |
||
5354 | serge | 4053 | struct i915_address_space *vm = NULL; |
4104 | Serge | 4054 | WARN_ON(vma->node.allocated); |
4560 | Serge | 4055 | |
4056 | /* Keep the vma as a placeholder in the execbuffer reservation lists */ |
||
4057 | if (!list_empty(&vma->exec_list)) |
||
4058 | return; |
||
4059 | |||
5354 | serge | 4060 | vm = vma->vm; |
4061 | |||
4062 | if (!i915_is_ggtt(vm)) |
||
4063 | i915_ppgtt_put(i915_vm_to_ppgtt(vm)); |
||
4064 | |||
4104 | Serge | 4065 | list_del(&vma->vma_link); |
4560 | Serge | 4066 | |
4104 | Serge | 4067 | kfree(vma); |
4068 | } |
||
4069 | |||
6084 | serge | 4070 | static void |
4071 | i915_gem_stop_ringbuffers(struct drm_device *dev) |
||
4072 | { |
||
4073 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
4074 | struct intel_engine_cs *ring; |
||
4075 | int i; |
||
4076 | |||
4077 | for_each_ring(ring, dev_priv, i) |
||
4078 | dev_priv->gt.stop_ring(ring); |
||
4079 | } |
||
4080 | |||
3031 | serge | 4081 | #if 0 |
4082 | int |
||
4560 | Serge | 4083 | i915_gem_suspend(struct drm_device *dev) |
2344 | Serge | 4084 | { |
5060 | serge | 4085 | struct drm_i915_private *dev_priv = dev->dev_private; |
4560 | Serge | 4086 | int ret = 0; |
2332 | Serge | 4087 | |
4560 | Serge | 4088 | mutex_lock(&dev->struct_mutex); |
3031 | serge | 4089 | ret = i915_gpu_idle(dev); |
4560 | Serge | 4090 | if (ret) |
4091 | goto err; |
||
4092 | |||
3031 | serge | 4093 | i915_gem_retire_requests(dev); |
4094 | |||
5060 | serge | 4095 | i915_gem_stop_ringbuffers(dev); |
4560 | Serge | 4096 | mutex_unlock(&dev->struct_mutex); |
4097 | |||
6084 | serge | 4098 | cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work); |
3263 | Serge | 4099 | cancel_delayed_work_sync(&dev_priv->mm.retire_work); |
5060 | serge | 4100 | flush_delayed_work(&dev_priv->mm.idle_work); |
3031 | serge | 4101 | |
6084 | serge | 4102 | /* Assert that we sucessfully flushed all the work and |
4103 | * reset the GPU back to its idle, low power state. |
||
4104 | */ |
||
4105 | WARN_ON(dev_priv->mm.busy); |
||
4106 | |||
3031 | serge | 4107 | return 0; |
4560 | Serge | 4108 | |
4109 | err: |
||
4110 | mutex_unlock(&dev->struct_mutex); |
||
4111 | return ret; |
||
2344 | Serge | 4112 | } |
3031 | serge | 4113 | #endif |
2332 | Serge | 4114 | |
6084 | serge | 4115 | int i915_gem_l3_remap(struct drm_i915_gem_request *req, int slice) |
3031 | serge | 4116 | { |
6084 | serge | 4117 | struct intel_engine_cs *ring = req->ring; |
4560 | Serge | 4118 | struct drm_device *dev = ring->dev; |
5060 | serge | 4119 | struct drm_i915_private *dev_priv = dev->dev_private; |
4560 | Serge | 4120 | u32 reg_base = GEN7_L3LOG_BASE + (slice * 0x200); |
4121 | u32 *remap_info = dev_priv->l3_parity.remap_info[slice]; |
||
4122 | int i, ret; |
||
2332 | Serge | 4123 | |
4560 | Serge | 4124 | if (!HAS_L3_DPF(dev) || !remap_info) |
4125 | return 0; |
||
2332 | Serge | 4126 | |
6084 | serge | 4127 | ret = intel_ring_begin(req, GEN7_L3LOG_SIZE / 4 * 3); |
4560 | Serge | 4128 | if (ret) |
4129 | return ret; |
||
2332 | Serge | 4130 | |
4560 | Serge | 4131 | /* |
4132 | * Note: We do not worry about the concurrent register cacheline hang |
||
4133 | * here because no other code should access these registers other than |
||
4134 | * at initialization time. |
||
4135 | */ |
||
3031 | serge | 4136 | for (i = 0; i < GEN7_L3LOG_SIZE; i += 4) { |
4560 | Serge | 4137 | intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1)); |
4138 | intel_ring_emit(ring, reg_base + i); |
||
4139 | intel_ring_emit(ring, remap_info[i/4]); |
||
3031 | serge | 4140 | } |
2332 | Serge | 4141 | |
4560 | Serge | 4142 | intel_ring_advance(ring); |
2332 | Serge | 4143 | |
4560 | Serge | 4144 | return ret; |
3031 | serge | 4145 | } |
2332 | Serge | 4146 | |
3031 | serge | 4147 | void i915_gem_init_swizzling(struct drm_device *dev) |
4148 | { |
||
5060 | serge | 4149 | struct drm_i915_private *dev_priv = dev->dev_private; |
2332 | Serge | 4150 | |
3031 | serge | 4151 | if (INTEL_INFO(dev)->gen < 5 || |
4152 | dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE) |
||
4153 | return; |
||
2332 | Serge | 4154 | |
3031 | serge | 4155 | I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) | |
4156 | DISP_TILE_SURFACE_SWIZZLING); |
||
2332 | Serge | 4157 | |
3031 | serge | 4158 | if (IS_GEN5(dev)) |
4159 | return; |
||
2344 | Serge | 4160 | |
3031 | serge | 4161 | I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL); |
4162 | if (IS_GEN6(dev)) |
||
4163 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB)); |
||
3480 | Serge | 4164 | else if (IS_GEN7(dev)) |
4165 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB)); |
||
4560 | Serge | 4166 | else if (IS_GEN8(dev)) |
4167 | I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_BDW)); |
||
3031 | serge | 4168 | else |
3480 | Serge | 4169 | BUG(); |
3031 | serge | 4170 | } |
4171 | |||
5354 | serge | 4172 | static void init_unused_ring(struct drm_device *dev, u32 base) |
2332 | Serge | 4173 | { |
3480 | Serge | 4174 | struct drm_i915_private *dev_priv = dev->dev_private; |
5354 | serge | 4175 | |
4176 | I915_WRITE(RING_CTL(base), 0); |
||
4177 | I915_WRITE(RING_HEAD(base), 0); |
||
4178 | I915_WRITE(RING_TAIL(base), 0); |
||
4179 | I915_WRITE(RING_START(base), 0); |
||
4180 | } |
||
4181 | |||
4182 | static void init_unused_rings(struct drm_device *dev) |
||
4183 | { |
||
4184 | if (IS_I830(dev)) { |
||
4185 | init_unused_ring(dev, PRB1_BASE); |
||
4186 | init_unused_ring(dev, SRB0_BASE); |
||
4187 | init_unused_ring(dev, SRB1_BASE); |
||
4188 | init_unused_ring(dev, SRB2_BASE); |
||
4189 | init_unused_ring(dev, SRB3_BASE); |
||
4190 | } else if (IS_GEN2(dev)) { |
||
4191 | init_unused_ring(dev, SRB0_BASE); |
||
4192 | init_unused_ring(dev, SRB1_BASE); |
||
4193 | } else if (IS_GEN3(dev)) { |
||
4194 | init_unused_ring(dev, PRB1_BASE); |
||
4195 | init_unused_ring(dev, PRB2_BASE); |
||
4196 | } |
||
4197 | } |
||
4198 | |||
4199 | int i915_gem_init_rings(struct drm_device *dev) |
||
4200 | { |
||
4201 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
2332 | Serge | 4202 | int ret; |
2351 | Serge | 4203 | |
2332 | Serge | 4204 | ret = intel_init_render_ring_buffer(dev); |
4205 | if (ret) |
||
4206 | return ret; |
||
4207 | |||
6084 | serge | 4208 | if (HAS_BSD(dev)) { |
2332 | Serge | 4209 | ret = intel_init_bsd_ring_buffer(dev); |
4210 | if (ret) |
||
4211 | goto cleanup_render_ring; |
||
4212 | } |
||
4213 | |||
6084 | serge | 4214 | if (HAS_BLT(dev)) { |
2332 | Serge | 4215 | ret = intel_init_blt_ring_buffer(dev); |
4216 | if (ret) |
||
4217 | goto cleanup_bsd_ring; |
||
4218 | } |
||
4219 | |||
4104 | Serge | 4220 | if (HAS_VEBOX(dev)) { |
4221 | ret = intel_init_vebox_ring_buffer(dev); |
||
4222 | if (ret) |
||
4223 | goto cleanup_blt_ring; |
||
4224 | } |
||
4225 | |||
5060 | serge | 4226 | if (HAS_BSD2(dev)) { |
4227 | ret = intel_init_bsd2_ring_buffer(dev); |
||
4228 | if (ret) |
||
4229 | goto cleanup_vebox_ring; |
||
4230 | } |
||
4104 | Serge | 4231 | |
2332 | Serge | 4232 | return 0; |
4233 | |||
4104 | Serge | 4234 | cleanup_vebox_ring: |
4235 | intel_cleanup_ring_buffer(&dev_priv->ring[VECS]); |
||
3480 | Serge | 4236 | cleanup_blt_ring: |
4237 | intel_cleanup_ring_buffer(&dev_priv->ring[BCS]); |
||
2332 | Serge | 4238 | cleanup_bsd_ring: |
4239 | intel_cleanup_ring_buffer(&dev_priv->ring[VCS]); |
||
4240 | cleanup_render_ring: |
||
4241 | intel_cleanup_ring_buffer(&dev_priv->ring[RCS]); |
||
3480 | Serge | 4242 | |
2332 | Serge | 4243 | return ret; |
4244 | } |
||
4245 | |||
3480 | Serge | 4246 | int |
4247 | i915_gem_init_hw(struct drm_device *dev) |
||
3031 | serge | 4248 | { |
5060 | serge | 4249 | struct drm_i915_private *dev_priv = dev->dev_private; |
6084 | serge | 4250 | struct intel_engine_cs *ring; |
4251 | int ret, i, j; |
||
3031 | serge | 4252 | |
3480 | Serge | 4253 | if (INTEL_INFO(dev)->gen < 6 && !intel_enable_gtt()) |
4254 | return -EIO; |
||
3031 | serge | 4255 | |
6084 | serge | 4256 | /* Double layer security blanket, see i915_gem_init() */ |
4257 | intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); |
||
4258 | |||
4104 | Serge | 4259 | if (dev_priv->ellc_size) |
4260 | I915_WRITE(HSW_IDICR, I915_READ(HSW_IDICR) | IDIHASHMSK(0xf)); |
||
3480 | Serge | 4261 | |
4560 | Serge | 4262 | if (IS_HASWELL(dev)) |
4263 | I915_WRITE(MI_PREDICATE_RESULT_2, IS_HSW_GT3(dev) ? |
||
4264 | LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED); |
||
4265 | |||
3746 | Serge | 4266 | if (HAS_PCH_NOP(dev)) { |
5060 | serge | 4267 | if (IS_IVYBRIDGE(dev)) { |
6084 | serge | 4268 | u32 temp = I915_READ(GEN7_MSG_CTL); |
4269 | temp &= ~(WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK); |
||
4270 | I915_WRITE(GEN7_MSG_CTL, temp); |
||
5060 | serge | 4271 | } else if (INTEL_INFO(dev)->gen >= 7) { |
4272 | u32 temp = I915_READ(HSW_NDE_RSTWRN_OPT); |
||
4273 | temp &= ~RESET_PCH_HANDSHAKE_ENABLE; |
||
4274 | I915_WRITE(HSW_NDE_RSTWRN_OPT, temp); |
||
4275 | } |
||
3746 | Serge | 4276 | } |
4277 | |||
3480 | Serge | 4278 | i915_gem_init_swizzling(dev); |
4279 | |||
6084 | serge | 4280 | /* |
4281 | * At least 830 can leave some of the unused rings |
||
4282 | * "active" (ie. head != tail) after resume which |
||
4283 | * will prevent c3 entry. Makes sure all unused rings |
||
4284 | * are totally idle. |
||
4285 | */ |
||
4286 | init_unused_rings(dev); |
||
3480 | Serge | 4287 | |
6084 | serge | 4288 | BUG_ON(!dev_priv->ring[RCS].default_context); |
4560 | Serge | 4289 | |
6084 | serge | 4290 | ret = i915_ppgtt_init_hw(dev); |
4291 | if (ret) { |
||
4292 | DRM_ERROR("PPGTT enable HW failed %d\n", ret); |
||
4293 | goto out; |
||
4294 | } |
||
4295 | |||
4296 | /* Need to do basic initialisation of all rings first: */ |
||
4297 | for_each_ring(ring, dev_priv, i) { |
||
4298 | ret = ring->init_hw(ring); |
||
4299 | if (ret) |
||
4300 | goto out; |
||
4301 | } |
||
4302 | |||
4303 | /* We can't enable contexts until all firmware is loaded */ |
||
4304 | if (HAS_GUC_UCODE(dev)) { |
||
4305 | ret = intel_guc_ucode_load(dev); |
||
4306 | if (ret) { |
||
4307 | /* |
||
4308 | * If we got an error and GuC submission is enabled, map |
||
4309 | * the error to -EIO so the GPU will be declared wedged. |
||
4310 | * OTOH, if we didn't intend to use the GuC anyway, just |
||
4311 | * discard the error and carry on. |
||
4312 | */ |
||
4313 | DRM_ERROR("Failed to initialize GuC, error %d%s\n", ret, |
||
4314 | i915.enable_guc_submission ? "" : |
||
4315 | " (ignored)"); |
||
4316 | ret = i915.enable_guc_submission ? -EIO : 0; |
||
4317 | if (ret) |
||
4318 | goto out; |
||
4319 | } |
||
4320 | } |
||
4321 | |||
3480 | Serge | 4322 | /* |
6084 | serge | 4323 | * Increment the next seqno by 0x100 so we have a visible break |
4324 | * on re-initialisation |
||
3480 | Serge | 4325 | */ |
6084 | serge | 4326 | ret = i915_gem_set_seqno(dev, dev_priv->next_seqno+0x100); |
4327 | if (ret) |
||
4328 | goto out; |
||
5354 | serge | 4329 | |
6084 | serge | 4330 | /* Now it is safe to go back round and do everything else: */ |
4331 | for_each_ring(ring, dev_priv, i) { |
||
4332 | struct drm_i915_gem_request *req; |
||
4560 | Serge | 4333 | |
6084 | serge | 4334 | WARN_ON(!ring->default_context); |
4335 | |||
4336 | ret = i915_gem_request_alloc(ring, ring->default_context, &req); |
||
4337 | if (ret) { |
||
4338 | i915_gem_cleanup_ringbuffer(dev); |
||
4339 | goto out; |
||
4340 | } |
||
4341 | |||
4342 | if (ring->id == RCS) { |
||
4343 | for (j = 0; j < NUM_L3_SLICES(dev); j++) |
||
4344 | i915_gem_l3_remap(req, j); |
||
4345 | } |
||
4346 | |||
4347 | ret = i915_ppgtt_init_ring(req); |
||
4348 | if (ret && ret != -EIO) { |
||
4349 | DRM_ERROR("PPGTT enable ring #%d failed %d\n", i, ret); |
||
4350 | i915_gem_request_cancel(req); |
||
4351 | i915_gem_cleanup_ringbuffer(dev); |
||
4352 | goto out; |
||
4353 | } |
||
4354 | |||
4355 | ret = i915_gem_context_enable(req); |
||
4356 | if (ret && ret != -EIO) { |
||
4357 | DRM_ERROR("Context enable ring #%d failed %d\n", i, ret); |
||
4358 | i915_gem_request_cancel(req); |
||
4359 | i915_gem_cleanup_ringbuffer(dev); |
||
4360 | goto out; |
||
4361 | } |
||
4362 | |||
4363 | i915_add_request_no_flush(req); |
||
5354 | serge | 4364 | } |
4365 | |||
6084 | serge | 4366 | out: |
4367 | intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); |
||
5060 | serge | 4368 | return ret; |
3031 | serge | 4369 | } |
4370 | |||
4371 | int i915_gem_init(struct drm_device *dev) |
||
4372 | { |
||
4373 | struct drm_i915_private *dev_priv = dev->dev_private; |
||
4374 | int ret; |
||
4375 | |||
5354 | serge | 4376 | i915.enable_execlists = intel_sanitize_enable_execlists(dev, |
4377 | i915.enable_execlists); |
||
4378 | |||
3031 | serge | 4379 | mutex_lock(&dev->struct_mutex); |
3746 | Serge | 4380 | |
4381 | if (IS_VALLEYVIEW(dev)) { |
||
4382 | /* VLVA0 (potential hack), BIOS isn't actually waking us */ |
||
5060 | serge | 4383 | I915_WRITE(VLV_GTLC_WAKE_CTRL, VLV_GTLC_ALLOWWAKEREQ); |
4384 | if (wait_for((I915_READ(VLV_GTLC_PW_STATUS) & |
||
4385 | VLV_GTLC_ALLOWWAKEACK), 10)) |
||
3746 | Serge | 4386 | DRM_DEBUG_DRIVER("allow wake ack timed out\n"); |
4387 | } |
||
4388 | |||
5354 | serge | 4389 | if (!i915.enable_execlists) { |
6084 | serge | 4390 | dev_priv->gt.execbuf_submit = i915_gem_ringbuffer_submission; |
5354 | serge | 4391 | dev_priv->gt.init_rings = i915_gem_init_rings; |
4392 | dev_priv->gt.cleanup_ring = intel_cleanup_ring_buffer; |
||
4393 | dev_priv->gt.stop_ring = intel_stop_ring_buffer; |
||
4394 | } else { |
||
6084 | serge | 4395 | dev_priv->gt.execbuf_submit = intel_execlists_submission; |
5354 | serge | 4396 | dev_priv->gt.init_rings = intel_logical_rings_init; |
4397 | dev_priv->gt.cleanup_ring = intel_logical_ring_cleanup; |
||
4398 | dev_priv->gt.stop_ring = intel_logical_ring_stop; |
||
4399 | } |
||
4400 | |||
6084 | serge | 4401 | /* This is just a security blanket to placate dragons. |
4402 | * On some systems, we very sporadically observe that the first TLBs |
||
4403 | * used by the CS may be stale, despite us poking the TLB reset. If |
||
4404 | * we hold the forcewake during initialisation these problems |
||
4405 | * just magically go away. |
||
4406 | */ |
||
4407 | intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); |
||
5354 | serge | 4408 | |
6084 | serge | 4409 | // ret = i915_gem_init_userptr(dev); |
4410 | // if (ret) |
||
4411 | // goto out_unlock; |
||
3746 | Serge | 4412 | |
6084 | serge | 4413 | i915_gem_init_global_gtt(dev); |
4414 | |||
5060 | serge | 4415 | ret = i915_gem_context_init(dev); |
6084 | serge | 4416 | if (ret) |
4417 | goto out_unlock; |
||
3031 | serge | 4418 | |
6084 | serge | 4419 | ret = dev_priv->gt.init_rings(dev); |
4420 | if (ret) |
||
4421 | goto out_unlock; |
||
4422 | |||
5060 | serge | 4423 | ret = i915_gem_init_hw(dev); |
4424 | if (ret == -EIO) { |
||
4425 | /* Allow ring initialisation to fail by marking the GPU as |
||
4426 | * wedged. But we only want to do this where the GPU is angry, |
||
4427 | * for all other failure, such as an allocation failure, bail. |
||
4428 | */ |
||
4429 | DRM_ERROR("Failed to initialize GPU, declaring it wedged\n"); |
||
6084 | serge | 4430 | atomic_or(I915_WEDGED, &dev_priv->gpu_error.reset_counter); |
5060 | serge | 4431 | ret = 0; |
4432 | } |
||
6084 | serge | 4433 | |
4434 | out_unlock: |
||
4435 | intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); |
||
5060 | serge | 4436 | mutex_unlock(&dev->struct_mutex); |
3746 | Serge | 4437 | |
6084 | serge | 4438 | return ret; |
3031 | serge | 4439 | } |
4440 | |||
2332 | Serge | 4441 | void |
4442 | i915_gem_cleanup_ringbuffer(struct drm_device *dev) |
||
4443 | { |
||
5060 | serge | 4444 | struct drm_i915_private *dev_priv = dev->dev_private; |
4445 | struct intel_engine_cs *ring; |
||
2332 | Serge | 4446 | int i; |
4447 | |||
3031 | serge | 4448 | for_each_ring(ring, dev_priv, i) |
5354 | serge | 4449 | dev_priv->gt.cleanup_ring(ring); |
2332 | Serge | 4450 | } |
4451 | |||
4452 | static void |
||
5060 | serge | 4453 | init_ring_lists(struct intel_engine_cs *ring) |
2326 | Serge | 4454 | { |
6084 | serge | 4455 | INIT_LIST_HEAD(&ring->active_list); |
4456 | INIT_LIST_HEAD(&ring->request_list); |
||
2326 | Serge | 4457 | } |
4458 | |||
4459 | void |
||
4460 | i915_gem_load(struct drm_device *dev) |
||
4461 | { |
||
5060 | serge | 4462 | struct drm_i915_private *dev_priv = dev->dev_private; |
6084 | serge | 4463 | int i; |
2326 | Serge | 4464 | |
4104 | Serge | 4465 | INIT_LIST_HEAD(&dev_priv->vm_list); |
4560 | Serge | 4466 | INIT_LIST_HEAD(&dev_priv->context_list); |
3031 | serge | 4467 | INIT_LIST_HEAD(&dev_priv->mm.unbound_list); |
4468 | INIT_LIST_HEAD(&dev_priv->mm.bound_list); |
||
6084 | serge | 4469 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
4470 | for (i = 0; i < I915_NUM_RINGS; i++) |
||
4471 | init_ring_lists(&dev_priv->ring[i]); |
||
2342 | Serge | 4472 | for (i = 0; i < I915_MAX_NUM_FENCES; i++) |
6084 | serge | 4473 | INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list); |
2360 | Serge | 4474 | INIT_DELAYED_WORK(&dev_priv->mm.retire_work, |
4475 | i915_gem_retire_work_handler); |
||
4560 | Serge | 4476 | INIT_DELAYED_WORK(&dev_priv->mm.idle_work, |
4477 | i915_gem_idle_work_handler); |
||
3480 | Serge | 4478 | init_waitqueue_head(&dev_priv->gpu_error.reset_queue); |
2326 | Serge | 4479 | |
6084 | serge | 4480 | dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL; |
2326 | Serge | 4481 | |
3746 | Serge | 4482 | if (INTEL_INFO(dev)->gen >= 7 && !IS_VALLEYVIEW(dev)) |
4483 | dev_priv->num_fence_regs = 32; |
||
4484 | else if (INTEL_INFO(dev)->gen >= 4 || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) |
||
6084 | serge | 4485 | dev_priv->num_fence_regs = 16; |
4486 | else |
||
4487 | dev_priv->num_fence_regs = 8; |
||
2326 | Serge | 4488 | |
6084 | serge | 4489 | if (intel_vgpu_active(dev)) |
4490 | dev_priv->num_fence_regs = |
||
4491 | I915_READ(vgtif_reg(avail_rs.fence_num)); |
||
4492 | |||
4493 | /* |
||
4494 | * Set initial sequence number for requests. |
||
4495 | * Using this number allows the wraparound to happen early, |
||
4496 | * catching any obvious problems. |
||
4497 | */ |
||
4498 | dev_priv->next_seqno = ((u32)~0 - 0x1100); |
||
4499 | dev_priv->last_seqno = ((u32)~0 - 0x1101); |
||
4500 | |||
4501 | /* Initialize fence registers to zero */ |
||
3746 | Serge | 4502 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
4503 | i915_gem_restore_fences(dev); |
||
2326 | Serge | 4504 | |
6084 | serge | 4505 | i915_gem_detect_bit_6_swizzle(dev); |
2326 | Serge | 4506 | |
6084 | serge | 4507 | dev_priv->mm.interruptible = true; |
2326 | Serge | 4508 | |
5060 | serge | 4509 | mutex_init(&dev_priv->fb_tracking.lock); |
2326 | Serge | 4510 | } |
4511 | |||
6084 | serge | 4512 | void i915_gem_release(struct drm_device *dev, struct drm_file *file) |
4513 | { |
||
4514 | struct drm_i915_file_private *file_priv = file->driver_priv; |
||
4515 | |||
4516 | /* Clean up our request list when the client is going away, so that |
||
4517 | * later retire_requests won't dereference our soon-to-be-gone |
||
4518 | * file_priv. |
||
4519 | */ |
||
4520 | spin_lock(&file_priv->mm.lock); |
||
4521 | while (!list_empty(&file_priv->mm.request_list)) { |
||
4522 | struct drm_i915_gem_request *request; |
||
4523 | |||
4524 | request = list_first_entry(&file_priv->mm.request_list, |
||
4525 | struct drm_i915_gem_request, |
||
4526 | client_list); |
||
4527 | list_del(&request->client_list); |
||
4528 | request->file_priv = NULL; |
||
4529 | } |
||
4530 | spin_unlock(&file_priv->mm.lock); |
||
4531 | |||
4532 | if (!list_empty(&file_priv->rps.link)) { |
||
4533 | spin_lock(&to_i915(dev)->rps.client_lock); |
||
4534 | list_del(&file_priv->rps.link); |
||
4535 | spin_unlock(&to_i915(dev)->rps.client_lock); |
||
4536 | } |
||
4537 | } |
||
4538 | |||
5060 | serge | 4539 | int i915_gem_open(struct drm_device *dev, struct drm_file *file) |
4104 | Serge | 4540 | { |
5060 | serge | 4541 | struct drm_i915_file_private *file_priv; |
4104 | Serge | 4542 | int ret; |
2326 | Serge | 4543 | |
5060 | serge | 4544 | DRM_DEBUG_DRIVER("\n"); |
4104 | Serge | 4545 | |
5060 | serge | 4546 | file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); |
4547 | if (!file_priv) |
||
4104 | Serge | 4548 | return -ENOMEM; |
4549 | |||
5060 | serge | 4550 | file->driver_priv = file_priv; |
4551 | file_priv->dev_priv = dev->dev_private; |
||
4552 | file_priv->file = file; |
||
6084 | serge | 4553 | INIT_LIST_HEAD(&file_priv->rps.link); |
4104 | Serge | 4554 | |
5060 | serge | 4555 | spin_lock_init(&file_priv->mm.lock); |
4556 | INIT_LIST_HEAD(&file_priv->mm.request_list); |
||
4104 | Serge | 4557 | |
5060 | serge | 4558 | ret = i915_gem_context_open(dev, file); |
4559 | if (ret) |
||
4560 | kfree(file_priv); |
||
4104 | Serge | 4561 | |
4562 | return ret; |
||
4563 | } |
||
4564 | |||
5354 | serge | 4565 | /** |
4566 | * i915_gem_track_fb - update frontbuffer tracking |
||
6084 | serge | 4567 | * @old: current GEM buffer for the frontbuffer slots |
4568 | * @new: new GEM buffer for the frontbuffer slots |
||
4569 | * @frontbuffer_bits: bitmask of frontbuffer slots |
||
5354 | serge | 4570 | * |
4571 | * This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them |
||
4572 | * from @old and setting them in @new. Both @old and @new can be NULL. |
||
4573 | */ |
||
5060 | serge | 4574 | void i915_gem_track_fb(struct drm_i915_gem_object *old, |
4575 | struct drm_i915_gem_object *new, |
||
4576 | unsigned frontbuffer_bits) |
||
4104 | Serge | 4577 | { |
5060 | serge | 4578 | if (old) { |
4579 | WARN_ON(!mutex_is_locked(&old->base.dev->struct_mutex)); |
||
4580 | WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits)); |
||
4581 | old->frontbuffer_bits &= ~frontbuffer_bits; |
||
4104 | Serge | 4582 | } |
4583 | |||
5060 | serge | 4584 | if (new) { |
4585 | WARN_ON(!mutex_is_locked(&new->base.dev->struct_mutex)); |
||
4586 | WARN_ON(new->frontbuffer_bits & frontbuffer_bits); |
||
4587 | new->frontbuffer_bits |= frontbuffer_bits; |
||
4104 | Serge | 4588 | } |
4589 | } |
||
4590 | |||
4591 | /* All the new VM stuff */ |
||
6084 | serge | 4592 | u64 i915_gem_obj_offset(struct drm_i915_gem_object *o, |
4593 | struct i915_address_space *vm) |
||
4104 | Serge | 4594 | { |
4595 | struct drm_i915_private *dev_priv = o->base.dev->dev_private; |
||
4596 | struct i915_vma *vma; |
||
4597 | |||
5354 | serge | 4598 | WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base); |
4104 | Serge | 4599 | |
4600 | list_for_each_entry(vma, &o->vma_list, vma_link) { |
||
6084 | serge | 4601 | if (i915_is_ggtt(vma->vm) && |
4602 | vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) |
||
4603 | continue; |
||
4104 | Serge | 4604 | if (vma->vm == vm) |
4605 | return vma->node.start; |
||
6084 | serge | 4606 | } |
4104 | Serge | 4607 | |
5060 | serge | 4608 | WARN(1, "%s vma for this object not found.\n", |
4609 | i915_is_ggtt(vm) ? "global" : "ppgtt"); |
||
4610 | return -1; |
||
4104 | Serge | 4611 | } |
4612 | |||
6084 | serge | 4613 | u64 i915_gem_obj_ggtt_offset_view(struct drm_i915_gem_object *o, |
4614 | const struct i915_ggtt_view *view) |
||
4615 | { |
||
4616 | struct i915_address_space *ggtt = i915_obj_to_ggtt(o); |
||
4617 | struct i915_vma *vma; |
||
4618 | |||
4619 | list_for_each_entry(vma, &o->vma_list, vma_link) |
||
4620 | if (vma->vm == ggtt && |
||
4621 | i915_ggtt_view_equal(&vma->ggtt_view, view)) |
||
4622 | return vma->node.start; |
||
4623 | |||
4624 | WARN(1, "global vma for this object not found. (view=%u)\n", view->type); |
||
4625 | return -1; |
||
4626 | } |
||
4627 | |||
4104 | Serge | 4628 | bool i915_gem_obj_bound(struct drm_i915_gem_object *o, |
4629 | struct i915_address_space *vm) |
||
4630 | { |
||
4631 | struct i915_vma *vma; |
||
4632 | |||
6084 | serge | 4633 | list_for_each_entry(vma, &o->vma_list, vma_link) { |
4634 | if (i915_is_ggtt(vma->vm) && |
||
4635 | vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) |
||
4636 | continue; |
||
4104 | Serge | 4637 | if (vma->vm == vm && drm_mm_node_allocated(&vma->node)) |
4638 | return true; |
||
6084 | serge | 4639 | } |
4104 | Serge | 4640 | |
4641 | return false; |
||
4642 | } |
||
4643 | |||
6084 | serge | 4644 | bool i915_gem_obj_ggtt_bound_view(struct drm_i915_gem_object *o, |
4645 | const struct i915_ggtt_view *view) |
||
4646 | { |
||
4647 | struct i915_address_space *ggtt = i915_obj_to_ggtt(o); |
||
4648 | struct i915_vma *vma; |
||
4649 | |||
4650 | list_for_each_entry(vma, &o->vma_list, vma_link) |
||
4651 | if (vma->vm == ggtt && |
||
4652 | i915_ggtt_view_equal(&vma->ggtt_view, view) && |
||
4653 | drm_mm_node_allocated(&vma->node)) |
||
4654 | return true; |
||
4655 | |||
4656 | return false; |
||
4657 | } |
||
4658 | |||
4104 | Serge | 4659 | bool i915_gem_obj_bound_any(struct drm_i915_gem_object *o) |
4660 | { |
||
4560 | Serge | 4661 | struct i915_vma *vma; |
4104 | Serge | 4662 | |
4560 | Serge | 4663 | list_for_each_entry(vma, &o->vma_list, vma_link) |
4664 | if (drm_mm_node_allocated(&vma->node)) |
||
4104 | Serge | 4665 | return true; |
4666 | |||
4667 | return false; |
||
4668 | } |
||
4669 | |||
4670 | unsigned long i915_gem_obj_size(struct drm_i915_gem_object *o, |
||
4671 | struct i915_address_space *vm) |
||
4672 | { |
||
4673 | struct drm_i915_private *dev_priv = o->base.dev->dev_private; |
||
4674 | struct i915_vma *vma; |
||
4675 | |||
5354 | serge | 4676 | WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base); |
4104 | Serge | 4677 | |
4678 | BUG_ON(list_empty(&o->vma_list)); |
||
4679 | |||
6084 | serge | 4680 | list_for_each_entry(vma, &o->vma_list, vma_link) { |
4681 | if (i915_is_ggtt(vma->vm) && |
||
4682 | vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) |
||
4683 | continue; |
||
4104 | Serge | 4684 | if (vma->vm == vm) |
4685 | return vma->node.size; |
||
6084 | serge | 4686 | } |
4104 | Serge | 4687 | return 0; |
4688 | } |
||
4560 | Serge | 4689 | |
6084 | serge | 4690 | bool i915_gem_obj_is_pinned(struct drm_i915_gem_object *obj) |
4691 | { |
||
4692 | struct i915_vma *vma; |
||
4693 | list_for_each_entry(vma, &obj->vma_list, vma_link) |
||
4694 | if (vma->pin_count > 0) |
||
4695 | return true; |
||
4560 | Serge | 4696 | |
6084 | serge | 4697 | return false; |
4698 | } |
||
5060 | serge | 4699 | |
6084 | serge | 4700 | /* Allocate a new GEM object and fill it with the supplied data */ |
4701 | struct drm_i915_gem_object * |
||
4702 | i915_gem_object_create_from_data(struct drm_device *dev, |
||
4703 | const void *data, size_t size) |
||
4104 | Serge | 4704 | { |
6084 | serge | 4705 | struct drm_i915_gem_object *obj; |
4706 | struct sg_table *sg; |
||
4707 | size_t bytes; |
||
4708 | int ret; |
||
4104 | Serge | 4709 | |
6084 | serge | 4710 | obj = i915_gem_alloc_object(dev, round_up(size, PAGE_SIZE)); |
4711 | if (IS_ERR_OR_NULL(obj)) |
||
4712 | return obj; |
||
4104 | Serge | 4713 | |
6084 | serge | 4714 | ret = i915_gem_object_set_to_cpu_domain(obj, true); |
4715 | if (ret) |
||
4716 | goto fail; |
||
4717 | |||
4718 | ret = i915_gem_object_get_pages(obj); |
||
4719 | if (ret) |
||
4720 | goto fail; |
||
4721 | |||
4722 | i915_gem_object_pin_pages(obj); |
||
4723 | sg = obj->pages; |
||
4724 | bytes = sg_copy_from_buffer(sg->sgl, sg->nents, (void *)data, size); |
||
4725 | i915_gem_object_unpin_pages(obj); |
||
4726 | |||
4727 | if (WARN_ON(bytes != size)) { |
||
4728 | DRM_ERROR("Incomplete copy, wrote %zu of %zu", bytes, size); |
||
4729 | ret = -EFAULT; |
||
4730 | goto fail; |
||
4731 | } |
||
4732 | |||
4733 | return obj; |
||
4734 | |||
4735 | fail: |
||
4736 | drm_gem_object_unreference(&obj->base); |
||
4737 | return ERR_PTR(ret); |
||
4104 | Serge | 4738 | }>>>>>>>><>= |