Commit | Line | Data |
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673a394b EA |
1 | /* |
2 | * Copyright © 2008 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Eric Anholt <eric@anholt.net> | |
25 | * | |
26 | */ | |
27 | ||
760285e7 | 28 | #include <drm/drmP.h> |
0de23977 | 29 | #include <drm/drm_vma_manager.h> |
760285e7 | 30 | #include <drm/i915_drm.h> |
673a394b | 31 | #include "i915_drv.h" |
1c5d22f7 | 32 | #include "i915_trace.h" |
652c393a | 33 | #include "intel_drv.h" |
2cfcd32a | 34 | #include <linux/oom.h> |
5949eac4 | 35 | #include <linux/shmem_fs.h> |
5a0e3ad6 | 36 | #include <linux/slab.h> |
673a394b | 37 | #include <linux/swap.h> |
79e53945 | 38 | #include <linux/pci.h> |
1286ff73 | 39 | #include <linux/dma-buf.h> |
673a394b | 40 | |
05394f39 | 41 | static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj); |
2c22569b CW |
42 | static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj, |
43 | bool force); | |
07fe0b12 | 44 | static __must_check int |
23f54483 BW |
45 | i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj, |
46 | bool readonly); | |
c8725f3d CW |
47 | static void |
48 | i915_gem_object_retire(struct drm_i915_gem_object *obj); | |
49 | ||
61050808 CW |
50 | static void i915_gem_write_fence(struct drm_device *dev, int reg, |
51 | struct drm_i915_gem_object *obj); | |
52 | static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, | |
53 | struct drm_i915_fence_reg *fence, | |
54 | bool enable); | |
55 | ||
ceabbba5 | 56 | static unsigned long i915_gem_shrinker_count(struct shrinker *shrinker, |
7dc19d5a | 57 | struct shrink_control *sc); |
ceabbba5 | 58 | static unsigned long i915_gem_shrinker_scan(struct shrinker *shrinker, |
7dc19d5a | 59 | struct shrink_control *sc); |
2cfcd32a CW |
60 | static int i915_gem_shrinker_oom(struct notifier_block *nb, |
61 | unsigned long event, | |
62 | void *ptr); | |
d9973b43 | 63 | static unsigned long i915_gem_shrink_all(struct drm_i915_private *dev_priv); |
31169714 | 64 | |
c76ce038 CW |
65 | static bool cpu_cache_is_coherent(struct drm_device *dev, |
66 | enum i915_cache_level level) | |
67 | { | |
68 | return HAS_LLC(dev) || level != I915_CACHE_NONE; | |
69 | } | |
70 | ||
2c22569b CW |
71 | static bool cpu_write_needs_clflush(struct drm_i915_gem_object *obj) |
72 | { | |
73 | if (!cpu_cache_is_coherent(obj->base.dev, obj->cache_level)) | |
74 | return true; | |
75 | ||
76 | return obj->pin_display; | |
77 | } | |
78 | ||
61050808 CW |
79 | static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj) |
80 | { | |
81 | if (obj->tiling_mode) | |
82 | i915_gem_release_mmap(obj); | |
83 | ||
84 | /* As we do not have an associated fence register, we will force | |
85 | * a tiling change if we ever need to acquire one. | |
86 | */ | |
5d82e3e6 | 87 | obj->fence_dirty = false; |
61050808 CW |
88 | obj->fence_reg = I915_FENCE_REG_NONE; |
89 | } | |
90 | ||
73aa808f CW |
91 | /* some bookkeeping */ |
92 | static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv, | |
93 | size_t size) | |
94 | { | |
c20e8355 | 95 | spin_lock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
96 | dev_priv->mm.object_count++; |
97 | dev_priv->mm.object_memory += size; | |
c20e8355 | 98 | spin_unlock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
99 | } |
100 | ||
101 | static void i915_gem_info_remove_obj(struct drm_i915_private *dev_priv, | |
102 | size_t size) | |
103 | { | |
c20e8355 | 104 | spin_lock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
105 | dev_priv->mm.object_count--; |
106 | dev_priv->mm.object_memory -= size; | |
c20e8355 | 107 | spin_unlock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
108 | } |
109 | ||
21dd3734 | 110 | static int |
33196ded | 111 | i915_gem_wait_for_error(struct i915_gpu_error *error) |
30dbf0c0 | 112 | { |
30dbf0c0 CW |
113 | int ret; |
114 | ||
7abb690a DV |
115 | #define EXIT_COND (!i915_reset_in_progress(error) || \ |
116 | i915_terminally_wedged(error)) | |
1f83fee0 | 117 | if (EXIT_COND) |
30dbf0c0 CW |
118 | return 0; |
119 | ||
0a6759c6 DV |
120 | /* |
121 | * Only wait 10 seconds for the gpu reset to complete to avoid hanging | |
122 | * userspace. If it takes that long something really bad is going on and | |
123 | * we should simply try to bail out and fail as gracefully as possible. | |
124 | */ | |
1f83fee0 DV |
125 | ret = wait_event_interruptible_timeout(error->reset_queue, |
126 | EXIT_COND, | |
127 | 10*HZ); | |
0a6759c6 DV |
128 | if (ret == 0) { |
129 | DRM_ERROR("Timed out waiting for the gpu reset to complete\n"); | |
130 | return -EIO; | |
131 | } else if (ret < 0) { | |
30dbf0c0 | 132 | return ret; |
0a6759c6 | 133 | } |
1f83fee0 | 134 | #undef EXIT_COND |
30dbf0c0 | 135 | |
21dd3734 | 136 | return 0; |
30dbf0c0 CW |
137 | } |
138 | ||
54cf91dc | 139 | int i915_mutex_lock_interruptible(struct drm_device *dev) |
76c1dec1 | 140 | { |
33196ded | 141 | struct drm_i915_private *dev_priv = dev->dev_private; |
76c1dec1 CW |
142 | int ret; |
143 | ||
33196ded | 144 | ret = i915_gem_wait_for_error(&dev_priv->gpu_error); |
76c1dec1 CW |
145 | if (ret) |
146 | return ret; | |
147 | ||
148 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
149 | if (ret) | |
150 | return ret; | |
151 | ||
23bc5982 | 152 | WARN_ON(i915_verify_lists(dev)); |
76c1dec1 CW |
153 | return 0; |
154 | } | |
30dbf0c0 | 155 | |
7d1c4804 | 156 | static inline bool |
05394f39 | 157 | i915_gem_object_is_inactive(struct drm_i915_gem_object *obj) |
7d1c4804 | 158 | { |
9843877d | 159 | return i915_gem_obj_bound_any(obj) && !obj->active; |
7d1c4804 CW |
160 | } |
161 | ||
5a125c3c EA |
162 | int |
163 | i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 164 | struct drm_file *file) |
5a125c3c | 165 | { |
73aa808f | 166 | struct drm_i915_private *dev_priv = dev->dev_private; |
5a125c3c | 167 | struct drm_i915_gem_get_aperture *args = data; |
6299f992 CW |
168 | struct drm_i915_gem_object *obj; |
169 | size_t pinned; | |
5a125c3c | 170 | |
6299f992 | 171 | pinned = 0; |
73aa808f | 172 | mutex_lock(&dev->struct_mutex); |
35c20a60 | 173 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) |
d7f46fc4 | 174 | if (i915_gem_obj_is_pinned(obj)) |
f343c5f6 | 175 | pinned += i915_gem_obj_ggtt_size(obj); |
73aa808f | 176 | mutex_unlock(&dev->struct_mutex); |
5a125c3c | 177 | |
853ba5d2 | 178 | args->aper_size = dev_priv->gtt.base.total; |
0206e353 | 179 | args->aper_available_size = args->aper_size - pinned; |
6299f992 | 180 | |
5a125c3c EA |
181 | return 0; |
182 | } | |
183 | ||
6a2c4232 CW |
184 | static int |
185 | i915_gem_object_get_pages_phys(struct drm_i915_gem_object *obj) | |
00731155 | 186 | { |
6a2c4232 CW |
187 | struct address_space *mapping = file_inode(obj->base.filp)->i_mapping; |
188 | char *vaddr = obj->phys_handle->vaddr; | |
189 | struct sg_table *st; | |
190 | struct scatterlist *sg; | |
191 | int i; | |
00731155 | 192 | |
6a2c4232 CW |
193 | if (WARN_ON(i915_gem_object_needs_bit17_swizzle(obj))) |
194 | return -EINVAL; | |
195 | ||
196 | for (i = 0; i < obj->base.size / PAGE_SIZE; i++) { | |
197 | struct page *page; | |
198 | char *src; | |
199 | ||
200 | page = shmem_read_mapping_page(mapping, i); | |
201 | if (IS_ERR(page)) | |
202 | return PTR_ERR(page); | |
203 | ||
204 | src = kmap_atomic(page); | |
205 | memcpy(vaddr, src, PAGE_SIZE); | |
206 | drm_clflush_virt_range(vaddr, PAGE_SIZE); | |
207 | kunmap_atomic(src); | |
208 | ||
209 | page_cache_release(page); | |
210 | vaddr += PAGE_SIZE; | |
211 | } | |
212 | ||
213 | i915_gem_chipset_flush(obj->base.dev); | |
214 | ||
215 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
216 | if (st == NULL) | |
217 | return -ENOMEM; | |
218 | ||
219 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
220 | kfree(st); | |
221 | return -ENOMEM; | |
222 | } | |
223 | ||
224 | sg = st->sgl; | |
225 | sg->offset = 0; | |
226 | sg->length = obj->base.size; | |
00731155 | 227 | |
6a2c4232 CW |
228 | sg_dma_address(sg) = obj->phys_handle->busaddr; |
229 | sg_dma_len(sg) = obj->base.size; | |
230 | ||
231 | obj->pages = st; | |
232 | obj->has_dma_mapping = true; | |
233 | return 0; | |
234 | } | |
235 | ||
236 | static void | |
237 | i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj) | |
238 | { | |
239 | int ret; | |
240 | ||
241 | BUG_ON(obj->madv == __I915_MADV_PURGED); | |
00731155 | 242 | |
6a2c4232 CW |
243 | ret = i915_gem_object_set_to_cpu_domain(obj, true); |
244 | if (ret) { | |
245 | /* In the event of a disaster, abandon all caches and | |
246 | * hope for the best. | |
247 | */ | |
248 | WARN_ON(ret != -EIO); | |
249 | obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
250 | } | |
251 | ||
252 | if (obj->madv == I915_MADV_DONTNEED) | |
253 | obj->dirty = 0; | |
254 | ||
255 | if (obj->dirty) { | |
00731155 | 256 | struct address_space *mapping = file_inode(obj->base.filp)->i_mapping; |
6a2c4232 | 257 | char *vaddr = obj->phys_handle->vaddr; |
00731155 CW |
258 | int i; |
259 | ||
260 | for (i = 0; i < obj->base.size / PAGE_SIZE; i++) { | |
6a2c4232 CW |
261 | struct page *page; |
262 | char *dst; | |
263 | ||
264 | page = shmem_read_mapping_page(mapping, i); | |
265 | if (IS_ERR(page)) | |
266 | continue; | |
267 | ||
268 | dst = kmap_atomic(page); | |
269 | drm_clflush_virt_range(vaddr, PAGE_SIZE); | |
270 | memcpy(dst, vaddr, PAGE_SIZE); | |
271 | kunmap_atomic(dst); | |
272 | ||
273 | set_page_dirty(page); | |
274 | if (obj->madv == I915_MADV_WILLNEED) | |
00731155 | 275 | mark_page_accessed(page); |
6a2c4232 | 276 | page_cache_release(page); |
00731155 CW |
277 | vaddr += PAGE_SIZE; |
278 | } | |
6a2c4232 | 279 | obj->dirty = 0; |
00731155 CW |
280 | } |
281 | ||
6a2c4232 CW |
282 | sg_free_table(obj->pages); |
283 | kfree(obj->pages); | |
284 | ||
285 | obj->has_dma_mapping = false; | |
286 | } | |
287 | ||
288 | static void | |
289 | i915_gem_object_release_phys(struct drm_i915_gem_object *obj) | |
290 | { | |
291 | drm_pci_free(obj->base.dev, obj->phys_handle); | |
292 | } | |
293 | ||
294 | static const struct drm_i915_gem_object_ops i915_gem_phys_ops = { | |
295 | .get_pages = i915_gem_object_get_pages_phys, | |
296 | .put_pages = i915_gem_object_put_pages_phys, | |
297 | .release = i915_gem_object_release_phys, | |
298 | }; | |
299 | ||
300 | static int | |
301 | drop_pages(struct drm_i915_gem_object *obj) | |
302 | { | |
303 | struct i915_vma *vma, *next; | |
304 | int ret; | |
305 | ||
306 | drm_gem_object_reference(&obj->base); | |
307 | list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) | |
308 | if (i915_vma_unbind(vma)) | |
309 | break; | |
310 | ||
311 | ret = i915_gem_object_put_pages(obj); | |
312 | drm_gem_object_unreference(&obj->base); | |
313 | ||
314 | return ret; | |
00731155 CW |
315 | } |
316 | ||
317 | int | |
318 | i915_gem_object_attach_phys(struct drm_i915_gem_object *obj, | |
319 | int align) | |
320 | { | |
321 | drm_dma_handle_t *phys; | |
6a2c4232 | 322 | int ret; |
00731155 CW |
323 | |
324 | if (obj->phys_handle) { | |
325 | if ((unsigned long)obj->phys_handle->vaddr & (align -1)) | |
326 | return -EBUSY; | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
331 | if (obj->madv != I915_MADV_WILLNEED) | |
332 | return -EFAULT; | |
333 | ||
334 | if (obj->base.filp == NULL) | |
335 | return -EINVAL; | |
336 | ||
6a2c4232 CW |
337 | ret = drop_pages(obj); |
338 | if (ret) | |
339 | return ret; | |
340 | ||
00731155 CW |
341 | /* create a new object */ |
342 | phys = drm_pci_alloc(obj->base.dev, obj->base.size, align); | |
343 | if (!phys) | |
344 | return -ENOMEM; | |
345 | ||
00731155 | 346 | obj->phys_handle = phys; |
6a2c4232 CW |
347 | obj->ops = &i915_gem_phys_ops; |
348 | ||
349 | return i915_gem_object_get_pages(obj); | |
00731155 CW |
350 | } |
351 | ||
352 | static int | |
353 | i915_gem_phys_pwrite(struct drm_i915_gem_object *obj, | |
354 | struct drm_i915_gem_pwrite *args, | |
355 | struct drm_file *file_priv) | |
356 | { | |
357 | struct drm_device *dev = obj->base.dev; | |
358 | void *vaddr = obj->phys_handle->vaddr + args->offset; | |
359 | char __user *user_data = to_user_ptr(args->data_ptr); | |
6a2c4232 CW |
360 | int ret; |
361 | ||
362 | /* We manually control the domain here and pretend that it | |
363 | * remains coherent i.e. in the GTT domain, like shmem_pwrite. | |
364 | */ | |
365 | ret = i915_gem_object_wait_rendering(obj, false); | |
366 | if (ret) | |
367 | return ret; | |
00731155 CW |
368 | |
369 | if (__copy_from_user_inatomic_nocache(vaddr, user_data, args->size)) { | |
370 | unsigned long unwritten; | |
371 | ||
372 | /* The physical object once assigned is fixed for the lifetime | |
373 | * of the obj, so we can safely drop the lock and continue | |
374 | * to access vaddr. | |
375 | */ | |
376 | mutex_unlock(&dev->struct_mutex); | |
377 | unwritten = copy_from_user(vaddr, user_data, args->size); | |
378 | mutex_lock(&dev->struct_mutex); | |
379 | if (unwritten) | |
380 | return -EFAULT; | |
381 | } | |
382 | ||
6a2c4232 | 383 | drm_clflush_virt_range(vaddr, args->size); |
00731155 CW |
384 | i915_gem_chipset_flush(dev); |
385 | return 0; | |
386 | } | |
387 | ||
42dcedd4 CW |
388 | void *i915_gem_object_alloc(struct drm_device *dev) |
389 | { | |
390 | struct drm_i915_private *dev_priv = dev->dev_private; | |
fac15c10 | 391 | return kmem_cache_zalloc(dev_priv->slab, GFP_KERNEL); |
42dcedd4 CW |
392 | } |
393 | ||
394 | void i915_gem_object_free(struct drm_i915_gem_object *obj) | |
395 | { | |
396 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
397 | kmem_cache_free(dev_priv->slab, obj); | |
398 | } | |
399 | ||
ff72145b DA |
400 | static int |
401 | i915_gem_create(struct drm_file *file, | |
402 | struct drm_device *dev, | |
403 | uint64_t size, | |
355a7018 | 404 | bool dumb, |
ff72145b | 405 | uint32_t *handle_p) |
673a394b | 406 | { |
05394f39 | 407 | struct drm_i915_gem_object *obj; |
a1a2d1d3 PP |
408 | int ret; |
409 | u32 handle; | |
673a394b | 410 | |
ff72145b | 411 | size = roundup(size, PAGE_SIZE); |
8ffc0246 CW |
412 | if (size == 0) |
413 | return -EINVAL; | |
673a394b EA |
414 | |
415 | /* Allocate the new object */ | |
ff72145b | 416 | obj = i915_gem_alloc_object(dev, size); |
673a394b EA |
417 | if (obj == NULL) |
418 | return -ENOMEM; | |
419 | ||
355a7018 | 420 | obj->base.dumb = dumb; |
05394f39 | 421 | ret = drm_gem_handle_create(file, &obj->base, &handle); |
202f2fef | 422 | /* drop reference from allocate - handle holds it now */ |
d861e338 DV |
423 | drm_gem_object_unreference_unlocked(&obj->base); |
424 | if (ret) | |
425 | return ret; | |
202f2fef | 426 | |
ff72145b | 427 | *handle_p = handle; |
673a394b EA |
428 | return 0; |
429 | } | |
430 | ||
ff72145b DA |
431 | int |
432 | i915_gem_dumb_create(struct drm_file *file, | |
433 | struct drm_device *dev, | |
434 | struct drm_mode_create_dumb *args) | |
435 | { | |
436 | /* have to work out size/pitch and return them */ | |
de45eaf7 | 437 | args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 64); |
ff72145b DA |
438 | args->size = args->pitch * args->height; |
439 | return i915_gem_create(file, dev, | |
355a7018 | 440 | args->size, true, &args->handle); |
ff72145b DA |
441 | } |
442 | ||
ff72145b DA |
443 | /** |
444 | * Creates a new mm object and returns a handle to it. | |
445 | */ | |
446 | int | |
447 | i915_gem_create_ioctl(struct drm_device *dev, void *data, | |
448 | struct drm_file *file) | |
449 | { | |
450 | struct drm_i915_gem_create *args = data; | |
63ed2cb2 | 451 | |
ff72145b | 452 | return i915_gem_create(file, dev, |
355a7018 | 453 | args->size, false, &args->handle); |
ff72145b DA |
454 | } |
455 | ||
8461d226 DV |
456 | static inline int |
457 | __copy_to_user_swizzled(char __user *cpu_vaddr, | |
458 | const char *gpu_vaddr, int gpu_offset, | |
459 | int length) | |
460 | { | |
461 | int ret, cpu_offset = 0; | |
462 | ||
463 | while (length > 0) { | |
464 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
465 | int this_length = min(cacheline_end - gpu_offset, length); | |
466 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
467 | ||
468 | ret = __copy_to_user(cpu_vaddr + cpu_offset, | |
469 | gpu_vaddr + swizzled_gpu_offset, | |
470 | this_length); | |
471 | if (ret) | |
472 | return ret + length; | |
473 | ||
474 | cpu_offset += this_length; | |
475 | gpu_offset += this_length; | |
476 | length -= this_length; | |
477 | } | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
8c59967c | 482 | static inline int |
4f0c7cfb BW |
483 | __copy_from_user_swizzled(char *gpu_vaddr, int gpu_offset, |
484 | const char __user *cpu_vaddr, | |
8c59967c DV |
485 | int length) |
486 | { | |
487 | int ret, cpu_offset = 0; | |
488 | ||
489 | while (length > 0) { | |
490 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
491 | int this_length = min(cacheline_end - gpu_offset, length); | |
492 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
493 | ||
494 | ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset, | |
495 | cpu_vaddr + cpu_offset, | |
496 | this_length); | |
497 | if (ret) | |
498 | return ret + length; | |
499 | ||
500 | cpu_offset += this_length; | |
501 | gpu_offset += this_length; | |
502 | length -= this_length; | |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
4c914c0c BV |
508 | /* |
509 | * Pins the specified object's pages and synchronizes the object with | |
510 | * GPU accesses. Sets needs_clflush to non-zero if the caller should | |
511 | * flush the object from the CPU cache. | |
512 | */ | |
513 | int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object *obj, | |
514 | int *needs_clflush) | |
515 | { | |
516 | int ret; | |
517 | ||
518 | *needs_clflush = 0; | |
519 | ||
520 | if (!obj->base.filp) | |
521 | return -EINVAL; | |
522 | ||
523 | if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) { | |
524 | /* If we're not in the cpu read domain, set ourself into the gtt | |
525 | * read domain and manually flush cachelines (if required). This | |
526 | * optimizes for the case when the gpu will dirty the data | |
527 | * anyway again before the next pread happens. */ | |
528 | *needs_clflush = !cpu_cache_is_coherent(obj->base.dev, | |
529 | obj->cache_level); | |
530 | ret = i915_gem_object_wait_rendering(obj, true); | |
531 | if (ret) | |
532 | return ret; | |
c8725f3d CW |
533 | |
534 | i915_gem_object_retire(obj); | |
4c914c0c BV |
535 | } |
536 | ||
537 | ret = i915_gem_object_get_pages(obj); | |
538 | if (ret) | |
539 | return ret; | |
540 | ||
541 | i915_gem_object_pin_pages(obj); | |
542 | ||
543 | return ret; | |
544 | } | |
545 | ||
d174bd64 DV |
546 | /* Per-page copy function for the shmem pread fastpath. |
547 | * Flushes invalid cachelines before reading the target if | |
548 | * needs_clflush is set. */ | |
eb01459f | 549 | static int |
d174bd64 DV |
550 | shmem_pread_fast(struct page *page, int shmem_page_offset, int page_length, |
551 | char __user *user_data, | |
552 | bool page_do_bit17_swizzling, bool needs_clflush) | |
553 | { | |
554 | char *vaddr; | |
555 | int ret; | |
556 | ||
e7e58eb5 | 557 | if (unlikely(page_do_bit17_swizzling)) |
d174bd64 DV |
558 | return -EINVAL; |
559 | ||
560 | vaddr = kmap_atomic(page); | |
561 | if (needs_clflush) | |
562 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
563 | page_length); | |
564 | ret = __copy_to_user_inatomic(user_data, | |
565 | vaddr + shmem_page_offset, | |
566 | page_length); | |
567 | kunmap_atomic(vaddr); | |
568 | ||
f60d7f0c | 569 | return ret ? -EFAULT : 0; |
d174bd64 DV |
570 | } |
571 | ||
23c18c71 DV |
572 | static void |
573 | shmem_clflush_swizzled_range(char *addr, unsigned long length, | |
574 | bool swizzled) | |
575 | { | |
e7e58eb5 | 576 | if (unlikely(swizzled)) { |
23c18c71 DV |
577 | unsigned long start = (unsigned long) addr; |
578 | unsigned long end = (unsigned long) addr + length; | |
579 | ||
580 | /* For swizzling simply ensure that we always flush both | |
581 | * channels. Lame, but simple and it works. Swizzled | |
582 | * pwrite/pread is far from a hotpath - current userspace | |
583 | * doesn't use it at all. */ | |
584 | start = round_down(start, 128); | |
585 | end = round_up(end, 128); | |
586 | ||
587 | drm_clflush_virt_range((void *)start, end - start); | |
588 | } else { | |
589 | drm_clflush_virt_range(addr, length); | |
590 | } | |
591 | ||
592 | } | |
593 | ||
d174bd64 DV |
594 | /* Only difference to the fast-path function is that this can handle bit17 |
595 | * and uses non-atomic copy and kmap functions. */ | |
596 | static int | |
597 | shmem_pread_slow(struct page *page, int shmem_page_offset, int page_length, | |
598 | char __user *user_data, | |
599 | bool page_do_bit17_swizzling, bool needs_clflush) | |
600 | { | |
601 | char *vaddr; | |
602 | int ret; | |
603 | ||
604 | vaddr = kmap(page); | |
605 | if (needs_clflush) | |
23c18c71 DV |
606 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
607 | page_length, | |
608 | page_do_bit17_swizzling); | |
d174bd64 DV |
609 | |
610 | if (page_do_bit17_swizzling) | |
611 | ret = __copy_to_user_swizzled(user_data, | |
612 | vaddr, shmem_page_offset, | |
613 | page_length); | |
614 | else | |
615 | ret = __copy_to_user(user_data, | |
616 | vaddr + shmem_page_offset, | |
617 | page_length); | |
618 | kunmap(page); | |
619 | ||
f60d7f0c | 620 | return ret ? - EFAULT : 0; |
d174bd64 DV |
621 | } |
622 | ||
eb01459f | 623 | static int |
dbf7bff0 DV |
624 | i915_gem_shmem_pread(struct drm_device *dev, |
625 | struct drm_i915_gem_object *obj, | |
626 | struct drm_i915_gem_pread *args, | |
627 | struct drm_file *file) | |
eb01459f | 628 | { |
8461d226 | 629 | char __user *user_data; |
eb01459f | 630 | ssize_t remain; |
8461d226 | 631 | loff_t offset; |
eb2c0c81 | 632 | int shmem_page_offset, page_length, ret = 0; |
8461d226 | 633 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
96d79b52 | 634 | int prefaulted = 0; |
8489731c | 635 | int needs_clflush = 0; |
67d5a50c | 636 | struct sg_page_iter sg_iter; |
eb01459f | 637 | |
2bb4629a | 638 | user_data = to_user_ptr(args->data_ptr); |
eb01459f EA |
639 | remain = args->size; |
640 | ||
8461d226 | 641 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
eb01459f | 642 | |
4c914c0c | 643 | ret = i915_gem_obj_prepare_shmem_read(obj, &needs_clflush); |
f60d7f0c CW |
644 | if (ret) |
645 | return ret; | |
646 | ||
8461d226 | 647 | offset = args->offset; |
eb01459f | 648 | |
67d5a50c ID |
649 | for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, |
650 | offset >> PAGE_SHIFT) { | |
2db76d7c | 651 | struct page *page = sg_page_iter_page(&sg_iter); |
9da3da66 CW |
652 | |
653 | if (remain <= 0) | |
654 | break; | |
655 | ||
eb01459f EA |
656 | /* Operation in this page |
657 | * | |
eb01459f | 658 | * shmem_page_offset = offset within page in shmem file |
eb01459f EA |
659 | * page_length = bytes to copy for this page |
660 | */ | |
c8cbbb8b | 661 | shmem_page_offset = offset_in_page(offset); |
eb01459f EA |
662 | page_length = remain; |
663 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
664 | page_length = PAGE_SIZE - shmem_page_offset; | |
eb01459f | 665 | |
8461d226 DV |
666 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
667 | (page_to_phys(page) & (1 << 17)) != 0; | |
668 | ||
d174bd64 DV |
669 | ret = shmem_pread_fast(page, shmem_page_offset, page_length, |
670 | user_data, page_do_bit17_swizzling, | |
671 | needs_clflush); | |
672 | if (ret == 0) | |
673 | goto next_page; | |
dbf7bff0 | 674 | |
dbf7bff0 DV |
675 | mutex_unlock(&dev->struct_mutex); |
676 | ||
d330a953 | 677 | if (likely(!i915.prefault_disable) && !prefaulted) { |
f56f821f | 678 | ret = fault_in_multipages_writeable(user_data, remain); |
96d79b52 DV |
679 | /* Userspace is tricking us, but we've already clobbered |
680 | * its pages with the prefault and promised to write the | |
681 | * data up to the first fault. Hence ignore any errors | |
682 | * and just continue. */ | |
683 | (void)ret; | |
684 | prefaulted = 1; | |
685 | } | |
eb01459f | 686 | |
d174bd64 DV |
687 | ret = shmem_pread_slow(page, shmem_page_offset, page_length, |
688 | user_data, page_do_bit17_swizzling, | |
689 | needs_clflush); | |
eb01459f | 690 | |
dbf7bff0 | 691 | mutex_lock(&dev->struct_mutex); |
f60d7f0c | 692 | |
f60d7f0c | 693 | if (ret) |
8461d226 | 694 | goto out; |
8461d226 | 695 | |
17793c9a | 696 | next_page: |
eb01459f | 697 | remain -= page_length; |
8461d226 | 698 | user_data += page_length; |
eb01459f EA |
699 | offset += page_length; |
700 | } | |
701 | ||
4f27b75d | 702 | out: |
f60d7f0c CW |
703 | i915_gem_object_unpin_pages(obj); |
704 | ||
eb01459f EA |
705 | return ret; |
706 | } | |
707 | ||
673a394b EA |
708 | /** |
709 | * Reads data from the object referenced by handle. | |
710 | * | |
711 | * On error, the contents of *data are undefined. | |
712 | */ | |
713 | int | |
714 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 715 | struct drm_file *file) |
673a394b EA |
716 | { |
717 | struct drm_i915_gem_pread *args = data; | |
05394f39 | 718 | struct drm_i915_gem_object *obj; |
35b62a89 | 719 | int ret = 0; |
673a394b | 720 | |
51311d0a CW |
721 | if (args->size == 0) |
722 | return 0; | |
723 | ||
724 | if (!access_ok(VERIFY_WRITE, | |
2bb4629a | 725 | to_user_ptr(args->data_ptr), |
51311d0a CW |
726 | args->size)) |
727 | return -EFAULT; | |
728 | ||
4f27b75d | 729 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 730 | if (ret) |
4f27b75d | 731 | return ret; |
673a394b | 732 | |
05394f39 | 733 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 734 | if (&obj->base == NULL) { |
1d7cfea1 CW |
735 | ret = -ENOENT; |
736 | goto unlock; | |
4f27b75d | 737 | } |
673a394b | 738 | |
7dcd2499 | 739 | /* Bounds check source. */ |
05394f39 CW |
740 | if (args->offset > obj->base.size || |
741 | args->size > obj->base.size - args->offset) { | |
ce9d419d | 742 | ret = -EINVAL; |
35b62a89 | 743 | goto out; |
ce9d419d CW |
744 | } |
745 | ||
1286ff73 DV |
746 | /* prime objects have no backing filp to GEM pread/pwrite |
747 | * pages from. | |
748 | */ | |
749 | if (!obj->base.filp) { | |
750 | ret = -EINVAL; | |
751 | goto out; | |
752 | } | |
753 | ||
db53a302 CW |
754 | trace_i915_gem_object_pread(obj, args->offset, args->size); |
755 | ||
dbf7bff0 | 756 | ret = i915_gem_shmem_pread(dev, obj, args, file); |
673a394b | 757 | |
35b62a89 | 758 | out: |
05394f39 | 759 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 760 | unlock: |
4f27b75d | 761 | mutex_unlock(&dev->struct_mutex); |
eb01459f | 762 | return ret; |
673a394b EA |
763 | } |
764 | ||
0839ccb8 KP |
765 | /* This is the fast write path which cannot handle |
766 | * page faults in the source data | |
9b7530cc | 767 | */ |
0839ccb8 KP |
768 | |
769 | static inline int | |
770 | fast_user_write(struct io_mapping *mapping, | |
771 | loff_t page_base, int page_offset, | |
772 | char __user *user_data, | |
773 | int length) | |
9b7530cc | 774 | { |
4f0c7cfb BW |
775 | void __iomem *vaddr_atomic; |
776 | void *vaddr; | |
0839ccb8 | 777 | unsigned long unwritten; |
9b7530cc | 778 | |
3e4d3af5 | 779 | vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base); |
4f0c7cfb BW |
780 | /* We can use the cpu mem copy function because this is X86. */ |
781 | vaddr = (void __force*)vaddr_atomic + page_offset; | |
782 | unwritten = __copy_from_user_inatomic_nocache(vaddr, | |
0839ccb8 | 783 | user_data, length); |
3e4d3af5 | 784 | io_mapping_unmap_atomic(vaddr_atomic); |
fbd5a26d | 785 | return unwritten; |
0839ccb8 KP |
786 | } |
787 | ||
3de09aa3 EA |
788 | /** |
789 | * This is the fast pwrite path, where we copy the data directly from the | |
790 | * user into the GTT, uncached. | |
791 | */ | |
673a394b | 792 | static int |
05394f39 CW |
793 | i915_gem_gtt_pwrite_fast(struct drm_device *dev, |
794 | struct drm_i915_gem_object *obj, | |
3de09aa3 | 795 | struct drm_i915_gem_pwrite *args, |
05394f39 | 796 | struct drm_file *file) |
673a394b | 797 | { |
3e31c6c0 | 798 | struct drm_i915_private *dev_priv = dev->dev_private; |
673a394b | 799 | ssize_t remain; |
0839ccb8 | 800 | loff_t offset, page_base; |
673a394b | 801 | char __user *user_data; |
935aaa69 DV |
802 | int page_offset, page_length, ret; |
803 | ||
1ec9e26d | 804 | ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE | PIN_NONBLOCK); |
935aaa69 DV |
805 | if (ret) |
806 | goto out; | |
807 | ||
808 | ret = i915_gem_object_set_to_gtt_domain(obj, true); | |
809 | if (ret) | |
810 | goto out_unpin; | |
811 | ||
812 | ret = i915_gem_object_put_fence(obj); | |
813 | if (ret) | |
814 | goto out_unpin; | |
673a394b | 815 | |
2bb4629a | 816 | user_data = to_user_ptr(args->data_ptr); |
673a394b | 817 | remain = args->size; |
673a394b | 818 | |
f343c5f6 | 819 | offset = i915_gem_obj_ggtt_offset(obj) + args->offset; |
673a394b EA |
820 | |
821 | while (remain > 0) { | |
822 | /* Operation in this page | |
823 | * | |
0839ccb8 KP |
824 | * page_base = page offset within aperture |
825 | * page_offset = offset within page | |
826 | * page_length = bytes to copy for this page | |
673a394b | 827 | */ |
c8cbbb8b CW |
828 | page_base = offset & PAGE_MASK; |
829 | page_offset = offset_in_page(offset); | |
0839ccb8 KP |
830 | page_length = remain; |
831 | if ((page_offset + remain) > PAGE_SIZE) | |
832 | page_length = PAGE_SIZE - page_offset; | |
833 | ||
0839ccb8 | 834 | /* If we get a fault while copying data, then (presumably) our |
3de09aa3 EA |
835 | * source page isn't available. Return the error and we'll |
836 | * retry in the slow path. | |
0839ccb8 | 837 | */ |
5d4545ae | 838 | if (fast_user_write(dev_priv->gtt.mappable, page_base, |
935aaa69 DV |
839 | page_offset, user_data, page_length)) { |
840 | ret = -EFAULT; | |
841 | goto out_unpin; | |
842 | } | |
673a394b | 843 | |
0839ccb8 KP |
844 | remain -= page_length; |
845 | user_data += page_length; | |
846 | offset += page_length; | |
673a394b | 847 | } |
673a394b | 848 | |
935aaa69 | 849 | out_unpin: |
d7f46fc4 | 850 | i915_gem_object_ggtt_unpin(obj); |
935aaa69 | 851 | out: |
3de09aa3 | 852 | return ret; |
673a394b EA |
853 | } |
854 | ||
d174bd64 DV |
855 | /* Per-page copy function for the shmem pwrite fastpath. |
856 | * Flushes invalid cachelines before writing to the target if | |
857 | * needs_clflush_before is set and flushes out any written cachelines after | |
858 | * writing if needs_clflush is set. */ | |
3043c60c | 859 | static int |
d174bd64 DV |
860 | shmem_pwrite_fast(struct page *page, int shmem_page_offset, int page_length, |
861 | char __user *user_data, | |
862 | bool page_do_bit17_swizzling, | |
863 | bool needs_clflush_before, | |
864 | bool needs_clflush_after) | |
673a394b | 865 | { |
d174bd64 | 866 | char *vaddr; |
673a394b | 867 | int ret; |
3de09aa3 | 868 | |
e7e58eb5 | 869 | if (unlikely(page_do_bit17_swizzling)) |
d174bd64 | 870 | return -EINVAL; |
3de09aa3 | 871 | |
d174bd64 DV |
872 | vaddr = kmap_atomic(page); |
873 | if (needs_clflush_before) | |
874 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
875 | page_length); | |
c2831a94 CW |
876 | ret = __copy_from_user_inatomic(vaddr + shmem_page_offset, |
877 | user_data, page_length); | |
d174bd64 DV |
878 | if (needs_clflush_after) |
879 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
880 | page_length); | |
881 | kunmap_atomic(vaddr); | |
3de09aa3 | 882 | |
755d2218 | 883 | return ret ? -EFAULT : 0; |
3de09aa3 EA |
884 | } |
885 | ||
d174bd64 DV |
886 | /* Only difference to the fast-path function is that this can handle bit17 |
887 | * and uses non-atomic copy and kmap functions. */ | |
3043c60c | 888 | static int |
d174bd64 DV |
889 | shmem_pwrite_slow(struct page *page, int shmem_page_offset, int page_length, |
890 | char __user *user_data, | |
891 | bool page_do_bit17_swizzling, | |
892 | bool needs_clflush_before, | |
893 | bool needs_clflush_after) | |
673a394b | 894 | { |
d174bd64 DV |
895 | char *vaddr; |
896 | int ret; | |
e5281ccd | 897 | |
d174bd64 | 898 | vaddr = kmap(page); |
e7e58eb5 | 899 | if (unlikely(needs_clflush_before || page_do_bit17_swizzling)) |
23c18c71 DV |
900 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
901 | page_length, | |
902 | page_do_bit17_swizzling); | |
d174bd64 DV |
903 | if (page_do_bit17_swizzling) |
904 | ret = __copy_from_user_swizzled(vaddr, shmem_page_offset, | |
e5281ccd CW |
905 | user_data, |
906 | page_length); | |
d174bd64 DV |
907 | else |
908 | ret = __copy_from_user(vaddr + shmem_page_offset, | |
909 | user_data, | |
910 | page_length); | |
911 | if (needs_clflush_after) | |
23c18c71 DV |
912 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
913 | page_length, | |
914 | page_do_bit17_swizzling); | |
d174bd64 | 915 | kunmap(page); |
40123c1f | 916 | |
755d2218 | 917 | return ret ? -EFAULT : 0; |
40123c1f EA |
918 | } |
919 | ||
40123c1f | 920 | static int |
e244a443 DV |
921 | i915_gem_shmem_pwrite(struct drm_device *dev, |
922 | struct drm_i915_gem_object *obj, | |
923 | struct drm_i915_gem_pwrite *args, | |
924 | struct drm_file *file) | |
40123c1f | 925 | { |
40123c1f | 926 | ssize_t remain; |
8c59967c DV |
927 | loff_t offset; |
928 | char __user *user_data; | |
eb2c0c81 | 929 | int shmem_page_offset, page_length, ret = 0; |
8c59967c | 930 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
e244a443 | 931 | int hit_slowpath = 0; |
58642885 DV |
932 | int needs_clflush_after = 0; |
933 | int needs_clflush_before = 0; | |
67d5a50c | 934 | struct sg_page_iter sg_iter; |
40123c1f | 935 | |
2bb4629a | 936 | user_data = to_user_ptr(args->data_ptr); |
40123c1f EA |
937 | remain = args->size; |
938 | ||
8c59967c | 939 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
40123c1f | 940 | |
58642885 DV |
941 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
942 | /* If we're not in the cpu write domain, set ourself into the gtt | |
943 | * write domain and manually flush cachelines (if required). This | |
944 | * optimizes for the case when the gpu will use the data | |
945 | * right away and we therefore have to clflush anyway. */ | |
2c22569b | 946 | needs_clflush_after = cpu_write_needs_clflush(obj); |
23f54483 BW |
947 | ret = i915_gem_object_wait_rendering(obj, false); |
948 | if (ret) | |
949 | return ret; | |
c8725f3d CW |
950 | |
951 | i915_gem_object_retire(obj); | |
58642885 | 952 | } |
c76ce038 CW |
953 | /* Same trick applies to invalidate partially written cachelines read |
954 | * before writing. */ | |
955 | if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) | |
956 | needs_clflush_before = | |
957 | !cpu_cache_is_coherent(dev, obj->cache_level); | |
58642885 | 958 | |
755d2218 CW |
959 | ret = i915_gem_object_get_pages(obj); |
960 | if (ret) | |
961 | return ret; | |
962 | ||
963 | i915_gem_object_pin_pages(obj); | |
964 | ||
673a394b | 965 | offset = args->offset; |
05394f39 | 966 | obj->dirty = 1; |
673a394b | 967 | |
67d5a50c ID |
968 | for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, |
969 | offset >> PAGE_SHIFT) { | |
2db76d7c | 970 | struct page *page = sg_page_iter_page(&sg_iter); |
58642885 | 971 | int partial_cacheline_write; |
e5281ccd | 972 | |
9da3da66 CW |
973 | if (remain <= 0) |
974 | break; | |
975 | ||
40123c1f EA |
976 | /* Operation in this page |
977 | * | |
40123c1f | 978 | * shmem_page_offset = offset within page in shmem file |
40123c1f EA |
979 | * page_length = bytes to copy for this page |
980 | */ | |
c8cbbb8b | 981 | shmem_page_offset = offset_in_page(offset); |
40123c1f EA |
982 | |
983 | page_length = remain; | |
984 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
985 | page_length = PAGE_SIZE - shmem_page_offset; | |
40123c1f | 986 | |
58642885 DV |
987 | /* If we don't overwrite a cacheline completely we need to be |
988 | * careful to have up-to-date data by first clflushing. Don't | |
989 | * overcomplicate things and flush the entire patch. */ | |
990 | partial_cacheline_write = needs_clflush_before && | |
991 | ((shmem_page_offset | page_length) | |
992 | & (boot_cpu_data.x86_clflush_size - 1)); | |
993 | ||
8c59967c DV |
994 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
995 | (page_to_phys(page) & (1 << 17)) != 0; | |
996 | ||
d174bd64 DV |
997 | ret = shmem_pwrite_fast(page, shmem_page_offset, page_length, |
998 | user_data, page_do_bit17_swizzling, | |
999 | partial_cacheline_write, | |
1000 | needs_clflush_after); | |
1001 | if (ret == 0) | |
1002 | goto next_page; | |
e244a443 DV |
1003 | |
1004 | hit_slowpath = 1; | |
e244a443 | 1005 | mutex_unlock(&dev->struct_mutex); |
d174bd64 DV |
1006 | ret = shmem_pwrite_slow(page, shmem_page_offset, page_length, |
1007 | user_data, page_do_bit17_swizzling, | |
1008 | partial_cacheline_write, | |
1009 | needs_clflush_after); | |
40123c1f | 1010 | |
e244a443 | 1011 | mutex_lock(&dev->struct_mutex); |
755d2218 | 1012 | |
755d2218 | 1013 | if (ret) |
8c59967c | 1014 | goto out; |
8c59967c | 1015 | |
17793c9a | 1016 | next_page: |
40123c1f | 1017 | remain -= page_length; |
8c59967c | 1018 | user_data += page_length; |
40123c1f | 1019 | offset += page_length; |
673a394b EA |
1020 | } |
1021 | ||
fbd5a26d | 1022 | out: |
755d2218 CW |
1023 | i915_gem_object_unpin_pages(obj); |
1024 | ||
e244a443 | 1025 | if (hit_slowpath) { |
8dcf015e DV |
1026 | /* |
1027 | * Fixup: Flush cpu caches in case we didn't flush the dirty | |
1028 | * cachelines in-line while writing and the object moved | |
1029 | * out of the cpu write domain while we've dropped the lock. | |
1030 | */ | |
1031 | if (!needs_clflush_after && | |
1032 | obj->base.write_domain != I915_GEM_DOMAIN_CPU) { | |
000433b6 CW |
1033 | if (i915_gem_clflush_object(obj, obj->pin_display)) |
1034 | i915_gem_chipset_flush(dev); | |
e244a443 | 1035 | } |
8c59967c | 1036 | } |
673a394b | 1037 | |
58642885 | 1038 | if (needs_clflush_after) |
e76e9aeb | 1039 | i915_gem_chipset_flush(dev); |
58642885 | 1040 | |
40123c1f | 1041 | return ret; |
673a394b EA |
1042 | } |
1043 | ||
1044 | /** | |
1045 | * Writes data to the object referenced by handle. | |
1046 | * | |
1047 | * On error, the contents of the buffer that were to be modified are undefined. | |
1048 | */ | |
1049 | int | |
1050 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, | |
fbd5a26d | 1051 | struct drm_file *file) |
673a394b EA |
1052 | { |
1053 | struct drm_i915_gem_pwrite *args = data; | |
05394f39 | 1054 | struct drm_i915_gem_object *obj; |
51311d0a CW |
1055 | int ret; |
1056 | ||
1057 | if (args->size == 0) | |
1058 | return 0; | |
1059 | ||
1060 | if (!access_ok(VERIFY_READ, | |
2bb4629a | 1061 | to_user_ptr(args->data_ptr), |
51311d0a CW |
1062 | args->size)) |
1063 | return -EFAULT; | |
1064 | ||
d330a953 | 1065 | if (likely(!i915.prefault_disable)) { |
0b74b508 XZ |
1066 | ret = fault_in_multipages_readable(to_user_ptr(args->data_ptr), |
1067 | args->size); | |
1068 | if (ret) | |
1069 | return -EFAULT; | |
1070 | } | |
673a394b | 1071 | |
fbd5a26d | 1072 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1073 | if (ret) |
fbd5a26d | 1074 | return ret; |
1d7cfea1 | 1075 | |
05394f39 | 1076 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 1077 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1078 | ret = -ENOENT; |
1079 | goto unlock; | |
fbd5a26d | 1080 | } |
673a394b | 1081 | |
7dcd2499 | 1082 | /* Bounds check destination. */ |
05394f39 CW |
1083 | if (args->offset > obj->base.size || |
1084 | args->size > obj->base.size - args->offset) { | |
ce9d419d | 1085 | ret = -EINVAL; |
35b62a89 | 1086 | goto out; |
ce9d419d CW |
1087 | } |
1088 | ||
1286ff73 DV |
1089 | /* prime objects have no backing filp to GEM pread/pwrite |
1090 | * pages from. | |
1091 | */ | |
1092 | if (!obj->base.filp) { | |
1093 | ret = -EINVAL; | |
1094 | goto out; | |
1095 | } | |
1096 | ||
db53a302 CW |
1097 | trace_i915_gem_object_pwrite(obj, args->offset, args->size); |
1098 | ||
935aaa69 | 1099 | ret = -EFAULT; |
673a394b EA |
1100 | /* We can only do the GTT pwrite on untiled buffers, as otherwise |
1101 | * it would end up going through the fenced access, and we'll get | |
1102 | * different detiling behavior between reading and writing. | |
1103 | * pread/pwrite currently are reading and writing from the CPU | |
1104 | * perspective, requiring manual detiling by the client. | |
1105 | */ | |
2c22569b CW |
1106 | if (obj->tiling_mode == I915_TILING_NONE && |
1107 | obj->base.write_domain != I915_GEM_DOMAIN_CPU && | |
1108 | cpu_write_needs_clflush(obj)) { | |
fbd5a26d | 1109 | ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file); |
935aaa69 DV |
1110 | /* Note that the gtt paths might fail with non-page-backed user |
1111 | * pointers (e.g. gtt mappings when moving data between | |
1112 | * textures). Fallback to the shmem path in that case. */ | |
fbd5a26d | 1113 | } |
673a394b | 1114 | |
6a2c4232 CW |
1115 | if (ret == -EFAULT || ret == -ENOSPC) { |
1116 | if (obj->phys_handle) | |
1117 | ret = i915_gem_phys_pwrite(obj, args, file); | |
1118 | else | |
1119 | ret = i915_gem_shmem_pwrite(dev, obj, args, file); | |
1120 | } | |
5c0480f2 | 1121 | |
35b62a89 | 1122 | out: |
05394f39 | 1123 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1124 | unlock: |
fbd5a26d | 1125 | mutex_unlock(&dev->struct_mutex); |
673a394b EA |
1126 | return ret; |
1127 | } | |
1128 | ||
b361237b | 1129 | int |
33196ded | 1130 | i915_gem_check_wedge(struct i915_gpu_error *error, |
b361237b CW |
1131 | bool interruptible) |
1132 | { | |
1f83fee0 | 1133 | if (i915_reset_in_progress(error)) { |
b361237b CW |
1134 | /* Non-interruptible callers can't handle -EAGAIN, hence return |
1135 | * -EIO unconditionally for these. */ | |
1136 | if (!interruptible) | |
1137 | return -EIO; | |
1138 | ||
1f83fee0 DV |
1139 | /* Recovery complete, but the reset failed ... */ |
1140 | if (i915_terminally_wedged(error)) | |
b361237b CW |
1141 | return -EIO; |
1142 | ||
6689c167 MA |
1143 | /* |
1144 | * Check if GPU Reset is in progress - we need intel_ring_begin | |
1145 | * to work properly to reinit the hw state while the gpu is | |
1146 | * still marked as reset-in-progress. Handle this with a flag. | |
1147 | */ | |
1148 | if (!error->reload_in_reset) | |
1149 | return -EAGAIN; | |
b361237b CW |
1150 | } |
1151 | ||
1152 | return 0; | |
1153 | } | |
1154 | ||
1155 | /* | |
1156 | * Compare seqno against outstanding lazy request. Emit a request if they are | |
1157 | * equal. | |
1158 | */ | |
84c33a64 | 1159 | int |
a4872ba6 | 1160 | i915_gem_check_olr(struct intel_engine_cs *ring, u32 seqno) |
b361237b CW |
1161 | { |
1162 | int ret; | |
1163 | ||
1164 | BUG_ON(!mutex_is_locked(&ring->dev->struct_mutex)); | |
1165 | ||
1166 | ret = 0; | |
1823521d | 1167 | if (seqno == ring->outstanding_lazy_seqno) |
0025c077 | 1168 | ret = i915_add_request(ring, NULL); |
b361237b CW |
1169 | |
1170 | return ret; | |
1171 | } | |
1172 | ||
094f9a54 CW |
1173 | static void fake_irq(unsigned long data) |
1174 | { | |
1175 | wake_up_process((struct task_struct *)data); | |
1176 | } | |
1177 | ||
1178 | static bool missed_irq(struct drm_i915_private *dev_priv, | |
a4872ba6 | 1179 | struct intel_engine_cs *ring) |
094f9a54 CW |
1180 | { |
1181 | return test_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings); | |
1182 | } | |
1183 | ||
b29c19b6 CW |
1184 | static bool can_wait_boost(struct drm_i915_file_private *file_priv) |
1185 | { | |
1186 | if (file_priv == NULL) | |
1187 | return true; | |
1188 | ||
1189 | return !atomic_xchg(&file_priv->rps_wait_boost, true); | |
1190 | } | |
1191 | ||
b361237b | 1192 | /** |
16e9a21f | 1193 | * __i915_wait_seqno - wait until execution of seqno has finished |
b361237b CW |
1194 | * @ring: the ring expected to report seqno |
1195 | * @seqno: duh! | |
f69061be | 1196 | * @reset_counter: reset sequence associated with the given seqno |
b361237b CW |
1197 | * @interruptible: do an interruptible wait (normally yes) |
1198 | * @timeout: in - how long to wait (NULL forever); out - how much time remaining | |
1199 | * | |
f69061be DV |
1200 | * Note: It is of utmost importance that the passed in seqno and reset_counter |
1201 | * values have been read by the caller in an smp safe manner. Where read-side | |
1202 | * locks are involved, it is sufficient to read the reset_counter before | |
1203 | * unlocking the lock that protects the seqno. For lockless tricks, the | |
1204 | * reset_counter _must_ be read before, and an appropriate smp_rmb must be | |
1205 | * inserted. | |
1206 | * | |
b361237b CW |
1207 | * Returns 0 if the seqno was found within the alloted time. Else returns the |
1208 | * errno with remaining time filled in timeout argument. | |
1209 | */ | |
16e9a21f | 1210 | int __i915_wait_seqno(struct intel_engine_cs *ring, u32 seqno, |
f69061be | 1211 | unsigned reset_counter, |
b29c19b6 | 1212 | bool interruptible, |
5ed0bdf2 | 1213 | s64 *timeout, |
b29c19b6 | 1214 | struct drm_i915_file_private *file_priv) |
b361237b | 1215 | { |
3d13ef2e | 1216 | struct drm_device *dev = ring->dev; |
3e31c6c0 | 1217 | struct drm_i915_private *dev_priv = dev->dev_private; |
168c3f21 MK |
1218 | const bool irq_test_in_progress = |
1219 | ACCESS_ONCE(dev_priv->gpu_error.test_irq_rings) & intel_ring_flag(ring); | |
094f9a54 | 1220 | DEFINE_WAIT(wait); |
47e9766d | 1221 | unsigned long timeout_expire; |
5ed0bdf2 | 1222 | s64 before, now; |
b361237b CW |
1223 | int ret; |
1224 | ||
9df7575f | 1225 | WARN(!intel_irqs_enabled(dev_priv), "IRQs disabled"); |
c67a470b | 1226 | |
b361237b CW |
1227 | if (i915_seqno_passed(ring->get_seqno(ring, true), seqno)) |
1228 | return 0; | |
1229 | ||
5ed0bdf2 | 1230 | timeout_expire = timeout ? jiffies + nsecs_to_jiffies((u64)*timeout) : 0; |
b361237b | 1231 | |
ec5cc0f9 | 1232 | if (INTEL_INFO(dev)->gen >= 6 && ring->id == RCS && can_wait_boost(file_priv)) { |
b29c19b6 CW |
1233 | gen6_rps_boost(dev_priv); |
1234 | if (file_priv) | |
1235 | mod_delayed_work(dev_priv->wq, | |
1236 | &file_priv->mm.idle_work, | |
1237 | msecs_to_jiffies(100)); | |
1238 | } | |
1239 | ||
168c3f21 | 1240 | if (!irq_test_in_progress && WARN_ON(!ring->irq_get(ring))) |
b361237b CW |
1241 | return -ENODEV; |
1242 | ||
094f9a54 CW |
1243 | /* Record current time in case interrupted by signal, or wedged */ |
1244 | trace_i915_gem_request_wait_begin(ring, seqno); | |
5ed0bdf2 | 1245 | before = ktime_get_raw_ns(); |
094f9a54 CW |
1246 | for (;;) { |
1247 | struct timer_list timer; | |
b361237b | 1248 | |
094f9a54 CW |
1249 | prepare_to_wait(&ring->irq_queue, &wait, |
1250 | interruptible ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); | |
b361237b | 1251 | |
f69061be DV |
1252 | /* We need to check whether any gpu reset happened in between |
1253 | * the caller grabbing the seqno and now ... */ | |
094f9a54 CW |
1254 | if (reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter)) { |
1255 | /* ... but upgrade the -EAGAIN to an -EIO if the gpu | |
1256 | * is truely gone. */ | |
1257 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible); | |
1258 | if (ret == 0) | |
1259 | ret = -EAGAIN; | |
1260 | break; | |
1261 | } | |
f69061be | 1262 | |
094f9a54 CW |
1263 | if (i915_seqno_passed(ring->get_seqno(ring, false), seqno)) { |
1264 | ret = 0; | |
1265 | break; | |
1266 | } | |
b361237b | 1267 | |
094f9a54 CW |
1268 | if (interruptible && signal_pending(current)) { |
1269 | ret = -ERESTARTSYS; | |
1270 | break; | |
1271 | } | |
1272 | ||
47e9766d | 1273 | if (timeout && time_after_eq(jiffies, timeout_expire)) { |
094f9a54 CW |
1274 | ret = -ETIME; |
1275 | break; | |
1276 | } | |
1277 | ||
1278 | timer.function = NULL; | |
1279 | if (timeout || missed_irq(dev_priv, ring)) { | |
47e9766d MK |
1280 | unsigned long expire; |
1281 | ||
094f9a54 | 1282 | setup_timer_on_stack(&timer, fake_irq, (unsigned long)current); |
47e9766d | 1283 | expire = missed_irq(dev_priv, ring) ? jiffies + 1 : timeout_expire; |
094f9a54 CW |
1284 | mod_timer(&timer, expire); |
1285 | } | |
1286 | ||
5035c275 | 1287 | io_schedule(); |
094f9a54 | 1288 | |
094f9a54 CW |
1289 | if (timer.function) { |
1290 | del_singleshot_timer_sync(&timer); | |
1291 | destroy_timer_on_stack(&timer); | |
1292 | } | |
1293 | } | |
5ed0bdf2 | 1294 | now = ktime_get_raw_ns(); |
094f9a54 | 1295 | trace_i915_gem_request_wait_end(ring, seqno); |
b361237b | 1296 | |
168c3f21 MK |
1297 | if (!irq_test_in_progress) |
1298 | ring->irq_put(ring); | |
094f9a54 CW |
1299 | |
1300 | finish_wait(&ring->irq_queue, &wait); | |
b361237b CW |
1301 | |
1302 | if (timeout) { | |
5ed0bdf2 TG |
1303 | s64 tres = *timeout - (now - before); |
1304 | ||
1305 | *timeout = tres < 0 ? 0 : tres; | |
b361237b CW |
1306 | } |
1307 | ||
094f9a54 | 1308 | return ret; |
b361237b CW |
1309 | } |
1310 | ||
1311 | /** | |
1312 | * Waits for a sequence number to be signaled, and cleans up the | |
1313 | * request and object lists appropriately for that event. | |
1314 | */ | |
1315 | int | |
a4872ba6 | 1316 | i915_wait_seqno(struct intel_engine_cs *ring, uint32_t seqno) |
b361237b CW |
1317 | { |
1318 | struct drm_device *dev = ring->dev; | |
1319 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1320 | bool interruptible = dev_priv->mm.interruptible; | |
16e9a21f | 1321 | unsigned reset_counter; |
b361237b CW |
1322 | int ret; |
1323 | ||
1324 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); | |
1325 | BUG_ON(seqno == 0); | |
1326 | ||
33196ded | 1327 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible); |
b361237b CW |
1328 | if (ret) |
1329 | return ret; | |
1330 | ||
1331 | ret = i915_gem_check_olr(ring, seqno); | |
1332 | if (ret) | |
1333 | return ret; | |
1334 | ||
16e9a21f ACO |
1335 | reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); |
1336 | return __i915_wait_seqno(ring, seqno, reset_counter, interruptible, | |
1337 | NULL, NULL); | |
b361237b CW |
1338 | } |
1339 | ||
d26e3af8 | 1340 | static int |
8e639549 | 1341 | i915_gem_object_wait_rendering__tail(struct drm_i915_gem_object *obj) |
d26e3af8 | 1342 | { |
c8725f3d CW |
1343 | if (!obj->active) |
1344 | return 0; | |
d26e3af8 CW |
1345 | |
1346 | /* Manually manage the write flush as we may have not yet | |
1347 | * retired the buffer. | |
1348 | * | |
97b2a6a1 JH |
1349 | * Note that the last_write_req is always the earlier of |
1350 | * the two (read/write) requests, so if we haved successfully waited, | |
d26e3af8 CW |
1351 | * we know we have passed the last write. |
1352 | */ | |
97b2a6a1 | 1353 | i915_gem_request_assign(&obj->last_write_req, NULL); |
d26e3af8 CW |
1354 | |
1355 | return 0; | |
1356 | } | |
1357 | ||
b361237b CW |
1358 | /** |
1359 | * Ensures that all rendering to the object has completed and the object is | |
1360 | * safe to unbind from the GTT or access from the CPU. | |
1361 | */ | |
1362 | static __must_check int | |
1363 | i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj, | |
1364 | bool readonly) | |
1365 | { | |
97b2a6a1 | 1366 | struct drm_i915_gem_request *req; |
a4872ba6 | 1367 | struct intel_engine_cs *ring = obj->ring; |
b361237b CW |
1368 | u32 seqno; |
1369 | int ret; | |
1370 | ||
97b2a6a1 JH |
1371 | req = readonly ? obj->last_write_req : obj->last_read_req; |
1372 | if (!req) | |
b361237b CW |
1373 | return 0; |
1374 | ||
97b2a6a1 JH |
1375 | seqno = i915_gem_request_get_seqno(req); |
1376 | WARN_ON(seqno == 0); | |
1377 | ||
b361237b CW |
1378 | ret = i915_wait_seqno(ring, seqno); |
1379 | if (ret) | |
1380 | return ret; | |
1381 | ||
8e639549 | 1382 | return i915_gem_object_wait_rendering__tail(obj); |
b361237b CW |
1383 | } |
1384 | ||
3236f57a CW |
1385 | /* A nonblocking variant of the above wait. This is a highly dangerous routine |
1386 | * as the object state may change during this call. | |
1387 | */ | |
1388 | static __must_check int | |
1389 | i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj, | |
6e4930f6 | 1390 | struct drm_i915_file_private *file_priv, |
3236f57a CW |
1391 | bool readonly) |
1392 | { | |
97b2a6a1 | 1393 | struct drm_i915_gem_request *req; |
3236f57a CW |
1394 | struct drm_device *dev = obj->base.dev; |
1395 | struct drm_i915_private *dev_priv = dev->dev_private; | |
a4872ba6 | 1396 | struct intel_engine_cs *ring = obj->ring; |
f69061be | 1397 | unsigned reset_counter; |
3236f57a CW |
1398 | u32 seqno; |
1399 | int ret; | |
1400 | ||
1401 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); | |
1402 | BUG_ON(!dev_priv->mm.interruptible); | |
1403 | ||
97b2a6a1 JH |
1404 | req = readonly ? obj->last_write_req : obj->last_read_req; |
1405 | if (!req) | |
3236f57a CW |
1406 | return 0; |
1407 | ||
97b2a6a1 JH |
1408 | seqno = i915_gem_request_get_seqno(req); |
1409 | WARN_ON(seqno == 0); | |
1410 | ||
33196ded | 1411 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, true); |
3236f57a CW |
1412 | if (ret) |
1413 | return ret; | |
1414 | ||
1415 | ret = i915_gem_check_olr(ring, seqno); | |
1416 | if (ret) | |
1417 | return ret; | |
1418 | ||
f69061be | 1419 | reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); |
ff865885 | 1420 | i915_gem_request_reference(req); |
3236f57a | 1421 | mutex_unlock(&dev->struct_mutex); |
16e9a21f ACO |
1422 | ret = __i915_wait_seqno(ring, seqno, reset_counter, true, NULL, |
1423 | file_priv); | |
3236f57a | 1424 | mutex_lock(&dev->struct_mutex); |
ff865885 | 1425 | i915_gem_request_unreference(req); |
d26e3af8 CW |
1426 | if (ret) |
1427 | return ret; | |
3236f57a | 1428 | |
8e639549 | 1429 | return i915_gem_object_wait_rendering__tail(obj); |
3236f57a CW |
1430 | } |
1431 | ||
673a394b | 1432 | /** |
2ef7eeaa EA |
1433 | * Called when user space prepares to use an object with the CPU, either |
1434 | * through the mmap ioctl's mapping or a GTT mapping. | |
673a394b EA |
1435 | */ |
1436 | int | |
1437 | i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1438 | struct drm_file *file) |
673a394b EA |
1439 | { |
1440 | struct drm_i915_gem_set_domain *args = data; | |
05394f39 | 1441 | struct drm_i915_gem_object *obj; |
2ef7eeaa EA |
1442 | uint32_t read_domains = args->read_domains; |
1443 | uint32_t write_domain = args->write_domain; | |
673a394b EA |
1444 | int ret; |
1445 | ||
2ef7eeaa | 1446 | /* Only handle setting domains to types used by the CPU. */ |
21d509e3 | 1447 | if (write_domain & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
1448 | return -EINVAL; |
1449 | ||
21d509e3 | 1450 | if (read_domains & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
1451 | return -EINVAL; |
1452 | ||
1453 | /* Having something in the write domain implies it's in the read | |
1454 | * domain, and only that read domain. Enforce that in the request. | |
1455 | */ | |
1456 | if (write_domain != 0 && read_domains != write_domain) | |
1457 | return -EINVAL; | |
1458 | ||
76c1dec1 | 1459 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1460 | if (ret) |
76c1dec1 | 1461 | return ret; |
1d7cfea1 | 1462 | |
05394f39 | 1463 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 1464 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1465 | ret = -ENOENT; |
1466 | goto unlock; | |
76c1dec1 | 1467 | } |
673a394b | 1468 | |
3236f57a CW |
1469 | /* Try to flush the object off the GPU without holding the lock. |
1470 | * We will repeat the flush holding the lock in the normal manner | |
1471 | * to catch cases where we are gazumped. | |
1472 | */ | |
6e4930f6 CW |
1473 | ret = i915_gem_object_wait_rendering__nonblocking(obj, |
1474 | file->driver_priv, | |
1475 | !write_domain); | |
3236f57a CW |
1476 | if (ret) |
1477 | goto unref; | |
1478 | ||
2ef7eeaa EA |
1479 | if (read_domains & I915_GEM_DOMAIN_GTT) { |
1480 | ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0); | |
02354392 EA |
1481 | |
1482 | /* Silently promote "you're not bound, there was nothing to do" | |
1483 | * to success, since the client was just asking us to | |
1484 | * make sure everything was done. | |
1485 | */ | |
1486 | if (ret == -EINVAL) | |
1487 | ret = 0; | |
2ef7eeaa | 1488 | } else { |
e47c68e9 | 1489 | ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0); |
2ef7eeaa EA |
1490 | } |
1491 | ||
3236f57a | 1492 | unref: |
05394f39 | 1493 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1494 | unlock: |
673a394b EA |
1495 | mutex_unlock(&dev->struct_mutex); |
1496 | return ret; | |
1497 | } | |
1498 | ||
1499 | /** | |
1500 | * Called when user space has done writes to this buffer | |
1501 | */ | |
1502 | int | |
1503 | i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1504 | struct drm_file *file) |
673a394b EA |
1505 | { |
1506 | struct drm_i915_gem_sw_finish *args = data; | |
05394f39 | 1507 | struct drm_i915_gem_object *obj; |
673a394b EA |
1508 | int ret = 0; |
1509 | ||
76c1dec1 | 1510 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1511 | if (ret) |
76c1dec1 | 1512 | return ret; |
1d7cfea1 | 1513 | |
05394f39 | 1514 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 1515 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1516 | ret = -ENOENT; |
1517 | goto unlock; | |
673a394b EA |
1518 | } |
1519 | ||
673a394b | 1520 | /* Pinned buffers may be scanout, so flush the cache */ |
2c22569b CW |
1521 | if (obj->pin_display) |
1522 | i915_gem_object_flush_cpu_write_domain(obj, true); | |
e47c68e9 | 1523 | |
05394f39 | 1524 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1525 | unlock: |
673a394b EA |
1526 | mutex_unlock(&dev->struct_mutex); |
1527 | return ret; | |
1528 | } | |
1529 | ||
1530 | /** | |
1531 | * Maps the contents of an object, returning the address it is mapped | |
1532 | * into. | |
1533 | * | |
1534 | * While the mapping holds a reference on the contents of the object, it doesn't | |
1535 | * imply a ref on the object itself. | |
34367381 DV |
1536 | * |
1537 | * IMPORTANT: | |
1538 | * | |
1539 | * DRM driver writers who look a this function as an example for how to do GEM | |
1540 | * mmap support, please don't implement mmap support like here. The modern way | |
1541 | * to implement DRM mmap support is with an mmap offset ioctl (like | |
1542 | * i915_gem_mmap_gtt) and then using the mmap syscall on the DRM fd directly. | |
1543 | * That way debug tooling like valgrind will understand what's going on, hiding | |
1544 | * the mmap call in a driver private ioctl will break that. The i915 driver only | |
1545 | * does cpu mmaps this way because we didn't know better. | |
673a394b EA |
1546 | */ |
1547 | int | |
1548 | i915_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1549 | struct drm_file *file) |
673a394b EA |
1550 | { |
1551 | struct drm_i915_gem_mmap *args = data; | |
1552 | struct drm_gem_object *obj; | |
673a394b EA |
1553 | unsigned long addr; |
1554 | ||
05394f39 | 1555 | obj = drm_gem_object_lookup(dev, file, args->handle); |
673a394b | 1556 | if (obj == NULL) |
bf79cb91 | 1557 | return -ENOENT; |
673a394b | 1558 | |
1286ff73 DV |
1559 | /* prime objects have no backing filp to GEM mmap |
1560 | * pages from. | |
1561 | */ | |
1562 | if (!obj->filp) { | |
1563 | drm_gem_object_unreference_unlocked(obj); | |
1564 | return -EINVAL; | |
1565 | } | |
1566 | ||
6be5ceb0 | 1567 | addr = vm_mmap(obj->filp, 0, args->size, |
673a394b EA |
1568 | PROT_READ | PROT_WRITE, MAP_SHARED, |
1569 | args->offset); | |
bc9025bd | 1570 | drm_gem_object_unreference_unlocked(obj); |
673a394b EA |
1571 | if (IS_ERR((void *)addr)) |
1572 | return addr; | |
1573 | ||
1574 | args->addr_ptr = (uint64_t) addr; | |
1575 | ||
1576 | return 0; | |
1577 | } | |
1578 | ||
de151cf6 JB |
1579 | /** |
1580 | * i915_gem_fault - fault a page into the GTT | |
1581 | * vma: VMA in question | |
1582 | * vmf: fault info | |
1583 | * | |
1584 | * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped | |
1585 | * from userspace. The fault handler takes care of binding the object to | |
1586 | * the GTT (if needed), allocating and programming a fence register (again, | |
1587 | * only if needed based on whether the old reg is still valid or the object | |
1588 | * is tiled) and inserting a new PTE into the faulting process. | |
1589 | * | |
1590 | * Note that the faulting process may involve evicting existing objects | |
1591 | * from the GTT and/or fence registers to make room. So performance may | |
1592 | * suffer if the GTT working set is large or there are few fence registers | |
1593 | * left. | |
1594 | */ | |
1595 | int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1596 | { | |
05394f39 CW |
1597 | struct drm_i915_gem_object *obj = to_intel_bo(vma->vm_private_data); |
1598 | struct drm_device *dev = obj->base.dev; | |
3e31c6c0 | 1599 | struct drm_i915_private *dev_priv = dev->dev_private; |
de151cf6 JB |
1600 | pgoff_t page_offset; |
1601 | unsigned long pfn; | |
1602 | int ret = 0; | |
0f973f27 | 1603 | bool write = !!(vmf->flags & FAULT_FLAG_WRITE); |
de151cf6 | 1604 | |
f65c9168 PZ |
1605 | intel_runtime_pm_get(dev_priv); |
1606 | ||
de151cf6 JB |
1607 | /* We don't use vmf->pgoff since that has the fake offset */ |
1608 | page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> | |
1609 | PAGE_SHIFT; | |
1610 | ||
d9bc7e9f CW |
1611 | ret = i915_mutex_lock_interruptible(dev); |
1612 | if (ret) | |
1613 | goto out; | |
a00b10c3 | 1614 | |
db53a302 CW |
1615 | trace_i915_gem_object_fault(obj, page_offset, true, write); |
1616 | ||
6e4930f6 CW |
1617 | /* Try to flush the object off the GPU first without holding the lock. |
1618 | * Upon reacquiring the lock, we will perform our sanity checks and then | |
1619 | * repeat the flush holding the lock in the normal manner to catch cases | |
1620 | * where we are gazumped. | |
1621 | */ | |
1622 | ret = i915_gem_object_wait_rendering__nonblocking(obj, NULL, !write); | |
1623 | if (ret) | |
1624 | goto unlock; | |
1625 | ||
eb119bd6 CW |
1626 | /* Access to snoopable pages through the GTT is incoherent. */ |
1627 | if (obj->cache_level != I915_CACHE_NONE && !HAS_LLC(dev)) { | |
ddeff6ee | 1628 | ret = -EFAULT; |
eb119bd6 CW |
1629 | goto unlock; |
1630 | } | |
1631 | ||
d9bc7e9f | 1632 | /* Now bind it into the GTT if needed */ |
1ec9e26d | 1633 | ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE); |
c9839303 CW |
1634 | if (ret) |
1635 | goto unlock; | |
4a684a41 | 1636 | |
c9839303 CW |
1637 | ret = i915_gem_object_set_to_gtt_domain(obj, write); |
1638 | if (ret) | |
1639 | goto unpin; | |
74898d7e | 1640 | |
06d98131 | 1641 | ret = i915_gem_object_get_fence(obj); |
d9e86c0e | 1642 | if (ret) |
c9839303 | 1643 | goto unpin; |
7d1c4804 | 1644 | |
b90b91d8 | 1645 | /* Finally, remap it using the new GTT offset */ |
f343c5f6 BW |
1646 | pfn = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj); |
1647 | pfn >>= PAGE_SHIFT; | |
de151cf6 | 1648 | |
b90b91d8 | 1649 | if (!obj->fault_mappable) { |
beff0d0f VS |
1650 | unsigned long size = min_t(unsigned long, |
1651 | vma->vm_end - vma->vm_start, | |
1652 | obj->base.size); | |
b90b91d8 CW |
1653 | int i; |
1654 | ||
beff0d0f | 1655 | for (i = 0; i < size >> PAGE_SHIFT; i++) { |
b90b91d8 CW |
1656 | ret = vm_insert_pfn(vma, |
1657 | (unsigned long)vma->vm_start + i * PAGE_SIZE, | |
1658 | pfn + i); | |
1659 | if (ret) | |
1660 | break; | |
1661 | } | |
1662 | ||
1663 | obj->fault_mappable = true; | |
1664 | } else | |
1665 | ret = vm_insert_pfn(vma, | |
1666 | (unsigned long)vmf->virtual_address, | |
1667 | pfn + page_offset); | |
c9839303 | 1668 | unpin: |
d7f46fc4 | 1669 | i915_gem_object_ggtt_unpin(obj); |
c715089f | 1670 | unlock: |
de151cf6 | 1671 | mutex_unlock(&dev->struct_mutex); |
d9bc7e9f | 1672 | out: |
de151cf6 | 1673 | switch (ret) { |
d9bc7e9f | 1674 | case -EIO: |
2232f031 DV |
1675 | /* |
1676 | * We eat errors when the gpu is terminally wedged to avoid | |
1677 | * userspace unduly crashing (gl has no provisions for mmaps to | |
1678 | * fail). But any other -EIO isn't ours (e.g. swap in failure) | |
1679 | * and so needs to be reported. | |
1680 | */ | |
1681 | if (!i915_terminally_wedged(&dev_priv->gpu_error)) { | |
f65c9168 PZ |
1682 | ret = VM_FAULT_SIGBUS; |
1683 | break; | |
1684 | } | |
045e769a | 1685 | case -EAGAIN: |
571c608d DV |
1686 | /* |
1687 | * EAGAIN means the gpu is hung and we'll wait for the error | |
1688 | * handler to reset everything when re-faulting in | |
1689 | * i915_mutex_lock_interruptible. | |
d9bc7e9f | 1690 | */ |
c715089f CW |
1691 | case 0: |
1692 | case -ERESTARTSYS: | |
bed636ab | 1693 | case -EINTR: |
e79e0fe3 DR |
1694 | case -EBUSY: |
1695 | /* | |
1696 | * EBUSY is ok: this just means that another thread | |
1697 | * already did the job. | |
1698 | */ | |
f65c9168 PZ |
1699 | ret = VM_FAULT_NOPAGE; |
1700 | break; | |
de151cf6 | 1701 | case -ENOMEM: |
f65c9168 PZ |
1702 | ret = VM_FAULT_OOM; |
1703 | break; | |
a7c2e1aa | 1704 | case -ENOSPC: |
45d67817 | 1705 | case -EFAULT: |
f65c9168 PZ |
1706 | ret = VM_FAULT_SIGBUS; |
1707 | break; | |
de151cf6 | 1708 | default: |
a7c2e1aa | 1709 | WARN_ONCE(ret, "unhandled error in i915_gem_fault: %i\n", ret); |
f65c9168 PZ |
1710 | ret = VM_FAULT_SIGBUS; |
1711 | break; | |
de151cf6 | 1712 | } |
f65c9168 PZ |
1713 | |
1714 | intel_runtime_pm_put(dev_priv); | |
1715 | return ret; | |
de151cf6 JB |
1716 | } |
1717 | ||
901782b2 CW |
1718 | /** |
1719 | * i915_gem_release_mmap - remove physical page mappings | |
1720 | * @obj: obj in question | |
1721 | * | |
af901ca1 | 1722 | * Preserve the reservation of the mmapping with the DRM core code, but |
901782b2 CW |
1723 | * relinquish ownership of the pages back to the system. |
1724 | * | |
1725 | * It is vital that we remove the page mapping if we have mapped a tiled | |
1726 | * object through the GTT and then lose the fence register due to | |
1727 | * resource pressure. Similarly if the object has been moved out of the | |
1728 | * aperture, than pages mapped into userspace must be revoked. Removing the | |
1729 | * mapping will then trigger a page fault on the next user access, allowing | |
1730 | * fixup by i915_gem_fault(). | |
1731 | */ | |
d05ca301 | 1732 | void |
05394f39 | 1733 | i915_gem_release_mmap(struct drm_i915_gem_object *obj) |
901782b2 | 1734 | { |
6299f992 CW |
1735 | if (!obj->fault_mappable) |
1736 | return; | |
901782b2 | 1737 | |
6796cb16 DH |
1738 | drm_vma_node_unmap(&obj->base.vma_node, |
1739 | obj->base.dev->anon_inode->i_mapping); | |
6299f992 | 1740 | obj->fault_mappable = false; |
901782b2 CW |
1741 | } |
1742 | ||
eedd10f4 CW |
1743 | void |
1744 | i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv) | |
1745 | { | |
1746 | struct drm_i915_gem_object *obj; | |
1747 | ||
1748 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) | |
1749 | i915_gem_release_mmap(obj); | |
1750 | } | |
1751 | ||
0fa87796 | 1752 | uint32_t |
e28f8711 | 1753 | i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode) |
92b88aeb | 1754 | { |
e28f8711 | 1755 | uint32_t gtt_size; |
92b88aeb CW |
1756 | |
1757 | if (INTEL_INFO(dev)->gen >= 4 || | |
e28f8711 CW |
1758 | tiling_mode == I915_TILING_NONE) |
1759 | return size; | |
92b88aeb CW |
1760 | |
1761 | /* Previous chips need a power-of-two fence region when tiling */ | |
1762 | if (INTEL_INFO(dev)->gen == 3) | |
e28f8711 | 1763 | gtt_size = 1024*1024; |
92b88aeb | 1764 | else |
e28f8711 | 1765 | gtt_size = 512*1024; |
92b88aeb | 1766 | |
e28f8711 CW |
1767 | while (gtt_size < size) |
1768 | gtt_size <<= 1; | |
92b88aeb | 1769 | |
e28f8711 | 1770 | return gtt_size; |
92b88aeb CW |
1771 | } |
1772 | ||
de151cf6 JB |
1773 | /** |
1774 | * i915_gem_get_gtt_alignment - return required GTT alignment for an object | |
1775 | * @obj: object to check | |
1776 | * | |
1777 | * Return the required GTT alignment for an object, taking into account | |
5e783301 | 1778 | * potential fence register mapping. |
de151cf6 | 1779 | */ |
d865110c ID |
1780 | uint32_t |
1781 | i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size, | |
1782 | int tiling_mode, bool fenced) | |
de151cf6 | 1783 | { |
de151cf6 JB |
1784 | /* |
1785 | * Minimum alignment is 4k (GTT page size), but might be greater | |
1786 | * if a fence register is needed for the object. | |
1787 | */ | |
d865110c | 1788 | if (INTEL_INFO(dev)->gen >= 4 || (!fenced && IS_G33(dev)) || |
e28f8711 | 1789 | tiling_mode == I915_TILING_NONE) |
de151cf6 JB |
1790 | return 4096; |
1791 | ||
a00b10c3 CW |
1792 | /* |
1793 | * Previous chips need to be aligned to the size of the smallest | |
1794 | * fence register that can contain the object. | |
1795 | */ | |
e28f8711 | 1796 | return i915_gem_get_gtt_size(dev, size, tiling_mode); |
a00b10c3 CW |
1797 | } |
1798 | ||
d8cb5086 CW |
1799 | static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj) |
1800 | { | |
1801 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
1802 | int ret; | |
1803 | ||
0de23977 | 1804 | if (drm_vma_node_has_offset(&obj->base.vma_node)) |
d8cb5086 CW |
1805 | return 0; |
1806 | ||
da494d7c DV |
1807 | dev_priv->mm.shrinker_no_lock_stealing = true; |
1808 | ||
d8cb5086 CW |
1809 | ret = drm_gem_create_mmap_offset(&obj->base); |
1810 | if (ret != -ENOSPC) | |
da494d7c | 1811 | goto out; |
d8cb5086 CW |
1812 | |
1813 | /* Badly fragmented mmap space? The only way we can recover | |
1814 | * space is by destroying unwanted objects. We can't randomly release | |
1815 | * mmap_offsets as userspace expects them to be persistent for the | |
1816 | * lifetime of the objects. The closest we can is to release the | |
1817 | * offsets on purgeable objects by truncating it and marking it purged, | |
1818 | * which prevents userspace from ever using that object again. | |
1819 | */ | |
21ab4e74 CW |
1820 | i915_gem_shrink(dev_priv, |
1821 | obj->base.size >> PAGE_SHIFT, | |
1822 | I915_SHRINK_BOUND | | |
1823 | I915_SHRINK_UNBOUND | | |
1824 | I915_SHRINK_PURGEABLE); | |
d8cb5086 CW |
1825 | ret = drm_gem_create_mmap_offset(&obj->base); |
1826 | if (ret != -ENOSPC) | |
da494d7c | 1827 | goto out; |
d8cb5086 CW |
1828 | |
1829 | i915_gem_shrink_all(dev_priv); | |
da494d7c DV |
1830 | ret = drm_gem_create_mmap_offset(&obj->base); |
1831 | out: | |
1832 | dev_priv->mm.shrinker_no_lock_stealing = false; | |
1833 | ||
1834 | return ret; | |
d8cb5086 CW |
1835 | } |
1836 | ||
1837 | static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object *obj) | |
1838 | { | |
d8cb5086 CW |
1839 | drm_gem_free_mmap_offset(&obj->base); |
1840 | } | |
1841 | ||
355a7018 | 1842 | static int |
ff72145b DA |
1843 | i915_gem_mmap_gtt(struct drm_file *file, |
1844 | struct drm_device *dev, | |
355a7018 | 1845 | uint32_t handle, bool dumb, |
ff72145b | 1846 | uint64_t *offset) |
de151cf6 | 1847 | { |
da761a6e | 1848 | struct drm_i915_private *dev_priv = dev->dev_private; |
05394f39 | 1849 | struct drm_i915_gem_object *obj; |
de151cf6 JB |
1850 | int ret; |
1851 | ||
76c1dec1 | 1852 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1853 | if (ret) |
76c1dec1 | 1854 | return ret; |
de151cf6 | 1855 | |
ff72145b | 1856 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle)); |
c8725226 | 1857 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1858 | ret = -ENOENT; |
1859 | goto unlock; | |
1860 | } | |
de151cf6 | 1861 | |
355a7018 TH |
1862 | /* |
1863 | * We don't allow dumb mmaps on objects created using another | |
1864 | * interface. | |
1865 | */ | |
1866 | WARN_ONCE(dumb && !(obj->base.dumb || obj->base.import_attach), | |
1867 | "Illegal dumb map of accelerated buffer.\n"); | |
1868 | ||
5d4545ae | 1869 | if (obj->base.size > dev_priv->gtt.mappable_end) { |
da761a6e | 1870 | ret = -E2BIG; |
ff56b0bc | 1871 | goto out; |
da761a6e CW |
1872 | } |
1873 | ||
05394f39 | 1874 | if (obj->madv != I915_MADV_WILLNEED) { |
bd9b6a4e | 1875 | DRM_DEBUG("Attempting to mmap a purgeable buffer\n"); |
8c99e57d | 1876 | ret = -EFAULT; |
1d7cfea1 | 1877 | goto out; |
ab18282d CW |
1878 | } |
1879 | ||
d8cb5086 CW |
1880 | ret = i915_gem_object_create_mmap_offset(obj); |
1881 | if (ret) | |
1882 | goto out; | |
de151cf6 | 1883 | |
0de23977 | 1884 | *offset = drm_vma_node_offset_addr(&obj->base.vma_node); |
de151cf6 | 1885 | |
1d7cfea1 | 1886 | out: |
05394f39 | 1887 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1888 | unlock: |
de151cf6 | 1889 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 1890 | return ret; |
de151cf6 JB |
1891 | } |
1892 | ||
355a7018 TH |
1893 | int |
1894 | i915_gem_dumb_map_offset(struct drm_file *file, | |
1895 | struct drm_device *dev, | |
1896 | uint32_t handle, | |
1897 | uint64_t *offset) | |
1898 | { | |
1899 | return i915_gem_mmap_gtt(file, dev, handle, true, offset); | |
1900 | } | |
1901 | ||
ff72145b DA |
1902 | /** |
1903 | * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing | |
1904 | * @dev: DRM device | |
1905 | * @data: GTT mapping ioctl data | |
1906 | * @file: GEM object info | |
1907 | * | |
1908 | * Simply returns the fake offset to userspace so it can mmap it. | |
1909 | * The mmap call will end up in drm_gem_mmap(), which will set things | |
1910 | * up so we can get faults in the handler above. | |
1911 | * | |
1912 | * The fault handler will take care of binding the object into the GTT | |
1913 | * (since it may have been evicted to make room for something), allocating | |
1914 | * a fence register, and mapping the appropriate aperture address into | |
1915 | * userspace. | |
1916 | */ | |
1917 | int | |
1918 | i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, | |
1919 | struct drm_file *file) | |
1920 | { | |
1921 | struct drm_i915_gem_mmap_gtt *args = data; | |
1922 | ||
355a7018 | 1923 | return i915_gem_mmap_gtt(file, dev, args->handle, false, &args->offset); |
ff72145b DA |
1924 | } |
1925 | ||
5537252b CW |
1926 | static inline int |
1927 | i915_gem_object_is_purgeable(struct drm_i915_gem_object *obj) | |
1928 | { | |
1929 | return obj->madv == I915_MADV_DONTNEED; | |
1930 | } | |
1931 | ||
225067ee DV |
1932 | /* Immediately discard the backing storage */ |
1933 | static void | |
1934 | i915_gem_object_truncate(struct drm_i915_gem_object *obj) | |
e5281ccd | 1935 | { |
4d6294bf | 1936 | i915_gem_object_free_mmap_offset(obj); |
1286ff73 | 1937 | |
4d6294bf CW |
1938 | if (obj->base.filp == NULL) |
1939 | return; | |
e5281ccd | 1940 | |
225067ee DV |
1941 | /* Our goal here is to return as much of the memory as |
1942 | * is possible back to the system as we are called from OOM. | |
1943 | * To do this we must instruct the shmfs to drop all of its | |
1944 | * backing pages, *now*. | |
1945 | */ | |
5537252b | 1946 | shmem_truncate_range(file_inode(obj->base.filp), 0, (loff_t)-1); |
225067ee DV |
1947 | obj->madv = __I915_MADV_PURGED; |
1948 | } | |
e5281ccd | 1949 | |
5537252b CW |
1950 | /* Try to discard unwanted pages */ |
1951 | static void | |
1952 | i915_gem_object_invalidate(struct drm_i915_gem_object *obj) | |
225067ee | 1953 | { |
5537252b CW |
1954 | struct address_space *mapping; |
1955 | ||
1956 | switch (obj->madv) { | |
1957 | case I915_MADV_DONTNEED: | |
1958 | i915_gem_object_truncate(obj); | |
1959 | case __I915_MADV_PURGED: | |
1960 | return; | |
1961 | } | |
1962 | ||
1963 | if (obj->base.filp == NULL) | |
1964 | return; | |
1965 | ||
1966 | mapping = file_inode(obj->base.filp)->i_mapping, | |
1967 | invalidate_mapping_pages(mapping, 0, (loff_t)-1); | |
e5281ccd CW |
1968 | } |
1969 | ||
5cdf5881 | 1970 | static void |
05394f39 | 1971 | i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj) |
673a394b | 1972 | { |
90797e6d ID |
1973 | struct sg_page_iter sg_iter; |
1974 | int ret; | |
1286ff73 | 1975 | |
05394f39 | 1976 | BUG_ON(obj->madv == __I915_MADV_PURGED); |
673a394b | 1977 | |
6c085a72 CW |
1978 | ret = i915_gem_object_set_to_cpu_domain(obj, true); |
1979 | if (ret) { | |
1980 | /* In the event of a disaster, abandon all caches and | |
1981 | * hope for the best. | |
1982 | */ | |
1983 | WARN_ON(ret != -EIO); | |
2c22569b | 1984 | i915_gem_clflush_object(obj, true); |
6c085a72 CW |
1985 | obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
1986 | } | |
1987 | ||
6dacfd2f | 1988 | if (i915_gem_object_needs_bit17_swizzle(obj)) |
280b713b EA |
1989 | i915_gem_object_save_bit_17_swizzle(obj); |
1990 | ||
05394f39 CW |
1991 | if (obj->madv == I915_MADV_DONTNEED) |
1992 | obj->dirty = 0; | |
3ef94daa | 1993 | |
90797e6d | 1994 | for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0) { |
2db76d7c | 1995 | struct page *page = sg_page_iter_page(&sg_iter); |
9da3da66 | 1996 | |
05394f39 | 1997 | if (obj->dirty) |
9da3da66 | 1998 | set_page_dirty(page); |
3ef94daa | 1999 | |
05394f39 | 2000 | if (obj->madv == I915_MADV_WILLNEED) |
9da3da66 | 2001 | mark_page_accessed(page); |
3ef94daa | 2002 | |
9da3da66 | 2003 | page_cache_release(page); |
3ef94daa | 2004 | } |
05394f39 | 2005 | obj->dirty = 0; |
673a394b | 2006 | |
9da3da66 CW |
2007 | sg_free_table(obj->pages); |
2008 | kfree(obj->pages); | |
37e680a1 | 2009 | } |
6c085a72 | 2010 | |
dd624afd | 2011 | int |
37e680a1 CW |
2012 | i915_gem_object_put_pages(struct drm_i915_gem_object *obj) |
2013 | { | |
2014 | const struct drm_i915_gem_object_ops *ops = obj->ops; | |
2015 | ||
2f745ad3 | 2016 | if (obj->pages == NULL) |
37e680a1 CW |
2017 | return 0; |
2018 | ||
a5570178 CW |
2019 | if (obj->pages_pin_count) |
2020 | return -EBUSY; | |
2021 | ||
9843877d | 2022 | BUG_ON(i915_gem_obj_bound_any(obj)); |
3e123027 | 2023 | |
a2165e31 CW |
2024 | /* ->put_pages might need to allocate memory for the bit17 swizzle |
2025 | * array, hence protect them from being reaped by removing them from gtt | |
2026 | * lists early. */ | |
35c20a60 | 2027 | list_del(&obj->global_list); |
a2165e31 | 2028 | |
37e680a1 | 2029 | ops->put_pages(obj); |
05394f39 | 2030 | obj->pages = NULL; |
37e680a1 | 2031 | |
5537252b | 2032 | i915_gem_object_invalidate(obj); |
6c085a72 CW |
2033 | |
2034 | return 0; | |
2035 | } | |
2036 | ||
21ab4e74 CW |
2037 | unsigned long |
2038 | i915_gem_shrink(struct drm_i915_private *dev_priv, | |
2039 | long target, unsigned flags) | |
6c085a72 | 2040 | { |
60a53727 CW |
2041 | const struct { |
2042 | struct list_head *list; | |
2043 | unsigned int bit; | |
2044 | } phases[] = { | |
2045 | { &dev_priv->mm.unbound_list, I915_SHRINK_UNBOUND }, | |
2046 | { &dev_priv->mm.bound_list, I915_SHRINK_BOUND }, | |
2047 | { NULL, 0 }, | |
2048 | }, *phase; | |
d9973b43 | 2049 | unsigned long count = 0; |
6c085a72 | 2050 | |
57094f82 | 2051 | /* |
c8725f3d | 2052 | * As we may completely rewrite the (un)bound list whilst unbinding |
57094f82 CW |
2053 | * (due to retiring requests) we have to strictly process only |
2054 | * one element of the list at the time, and recheck the list | |
2055 | * on every iteration. | |
c8725f3d CW |
2056 | * |
2057 | * In particular, we must hold a reference whilst removing the | |
2058 | * object as we may end up waiting for and/or retiring the objects. | |
2059 | * This might release the final reference (held by the active list) | |
2060 | * and result in the object being freed from under us. This is | |
2061 | * similar to the precautions the eviction code must take whilst | |
2062 | * removing objects. | |
2063 | * | |
2064 | * Also note that although these lists do not hold a reference to | |
2065 | * the object we can safely grab one here: The final object | |
2066 | * unreferencing and the bound_list are both protected by the | |
2067 | * dev->struct_mutex and so we won't ever be able to observe an | |
2068 | * object on the bound_list with a reference count equals 0. | |
57094f82 | 2069 | */ |
60a53727 | 2070 | for (phase = phases; phase->list; phase++) { |
21ab4e74 | 2071 | struct list_head still_in_list; |
c8725f3d | 2072 | |
60a53727 CW |
2073 | if ((flags & phase->bit) == 0) |
2074 | continue; | |
80dcfdbd | 2075 | |
21ab4e74 | 2076 | INIT_LIST_HEAD(&still_in_list); |
60a53727 | 2077 | while (count < target && !list_empty(phase->list)) { |
21ab4e74 CW |
2078 | struct drm_i915_gem_object *obj; |
2079 | struct i915_vma *vma, *v; | |
57094f82 | 2080 | |
60a53727 | 2081 | obj = list_first_entry(phase->list, |
21ab4e74 CW |
2082 | typeof(*obj), global_list); |
2083 | list_move_tail(&obj->global_list, &still_in_list); | |
80dcfdbd | 2084 | |
60a53727 CW |
2085 | if (flags & I915_SHRINK_PURGEABLE && |
2086 | !i915_gem_object_is_purgeable(obj)) | |
21ab4e74 | 2087 | continue; |
57094f82 | 2088 | |
21ab4e74 | 2089 | drm_gem_object_reference(&obj->base); |
80dcfdbd | 2090 | |
60a53727 CW |
2091 | /* For the unbound phase, this should be a no-op! */ |
2092 | list_for_each_entry_safe(vma, v, | |
2093 | &obj->vma_list, vma_link) | |
21ab4e74 CW |
2094 | if (i915_vma_unbind(vma)) |
2095 | break; | |
57094f82 | 2096 | |
21ab4e74 CW |
2097 | if (i915_gem_object_put_pages(obj) == 0) |
2098 | count += obj->base.size >> PAGE_SHIFT; | |
2099 | ||
2100 | drm_gem_object_unreference(&obj->base); | |
2101 | } | |
60a53727 | 2102 | list_splice(&still_in_list, phase->list); |
6c085a72 CW |
2103 | } |
2104 | ||
2105 | return count; | |
2106 | } | |
2107 | ||
d9973b43 | 2108 | static unsigned long |
6c085a72 CW |
2109 | i915_gem_shrink_all(struct drm_i915_private *dev_priv) |
2110 | { | |
6c085a72 | 2111 | i915_gem_evict_everything(dev_priv->dev); |
21ab4e74 CW |
2112 | return i915_gem_shrink(dev_priv, LONG_MAX, |
2113 | I915_SHRINK_BOUND | I915_SHRINK_UNBOUND); | |
225067ee DV |
2114 | } |
2115 | ||
37e680a1 | 2116 | static int |
6c085a72 | 2117 | i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) |
e5281ccd | 2118 | { |
6c085a72 | 2119 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
e5281ccd CW |
2120 | int page_count, i; |
2121 | struct address_space *mapping; | |
9da3da66 CW |
2122 | struct sg_table *st; |
2123 | struct scatterlist *sg; | |
90797e6d | 2124 | struct sg_page_iter sg_iter; |
e5281ccd | 2125 | struct page *page; |
90797e6d | 2126 | unsigned long last_pfn = 0; /* suppress gcc warning */ |
6c085a72 | 2127 | gfp_t gfp; |
e5281ccd | 2128 | |
6c085a72 CW |
2129 | /* Assert that the object is not currently in any GPU domain. As it |
2130 | * wasn't in the GTT, there shouldn't be any way it could have been in | |
2131 | * a GPU cache | |
2132 | */ | |
2133 | BUG_ON(obj->base.read_domains & I915_GEM_GPU_DOMAINS); | |
2134 | BUG_ON(obj->base.write_domain & I915_GEM_GPU_DOMAINS); | |
2135 | ||
9da3da66 CW |
2136 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
2137 | if (st == NULL) | |
2138 | return -ENOMEM; | |
2139 | ||
05394f39 | 2140 | page_count = obj->base.size / PAGE_SIZE; |
9da3da66 | 2141 | if (sg_alloc_table(st, page_count, GFP_KERNEL)) { |
9da3da66 | 2142 | kfree(st); |
e5281ccd | 2143 | return -ENOMEM; |
9da3da66 | 2144 | } |
e5281ccd | 2145 | |
9da3da66 CW |
2146 | /* Get the list of pages out of our struct file. They'll be pinned |
2147 | * at this point until we release them. | |
2148 | * | |
2149 | * Fail silently without starting the shrinker | |
2150 | */ | |
496ad9aa | 2151 | mapping = file_inode(obj->base.filp)->i_mapping; |
6c085a72 | 2152 | gfp = mapping_gfp_mask(mapping); |
caf49191 | 2153 | gfp |= __GFP_NORETRY | __GFP_NOWARN | __GFP_NO_KSWAPD; |
6c085a72 | 2154 | gfp &= ~(__GFP_IO | __GFP_WAIT); |
90797e6d ID |
2155 | sg = st->sgl; |
2156 | st->nents = 0; | |
2157 | for (i = 0; i < page_count; i++) { | |
6c085a72 CW |
2158 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); |
2159 | if (IS_ERR(page)) { | |
21ab4e74 CW |
2160 | i915_gem_shrink(dev_priv, |
2161 | page_count, | |
2162 | I915_SHRINK_BOUND | | |
2163 | I915_SHRINK_UNBOUND | | |
2164 | I915_SHRINK_PURGEABLE); | |
6c085a72 CW |
2165 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); |
2166 | } | |
2167 | if (IS_ERR(page)) { | |
2168 | /* We've tried hard to allocate the memory by reaping | |
2169 | * our own buffer, now let the real VM do its job and | |
2170 | * go down in flames if truly OOM. | |
2171 | */ | |
6c085a72 | 2172 | i915_gem_shrink_all(dev_priv); |
f461d1be | 2173 | page = shmem_read_mapping_page(mapping, i); |
6c085a72 CW |
2174 | if (IS_ERR(page)) |
2175 | goto err_pages; | |
6c085a72 | 2176 | } |
426729dc KRW |
2177 | #ifdef CONFIG_SWIOTLB |
2178 | if (swiotlb_nr_tbl()) { | |
2179 | st->nents++; | |
2180 | sg_set_page(sg, page, PAGE_SIZE, 0); | |
2181 | sg = sg_next(sg); | |
2182 | continue; | |
2183 | } | |
2184 | #endif | |
90797e6d ID |
2185 | if (!i || page_to_pfn(page) != last_pfn + 1) { |
2186 | if (i) | |
2187 | sg = sg_next(sg); | |
2188 | st->nents++; | |
2189 | sg_set_page(sg, page, PAGE_SIZE, 0); | |
2190 | } else { | |
2191 | sg->length += PAGE_SIZE; | |
2192 | } | |
2193 | last_pfn = page_to_pfn(page); | |
3bbbe706 DV |
2194 | |
2195 | /* Check that the i965g/gm workaround works. */ | |
2196 | WARN_ON((gfp & __GFP_DMA32) && (last_pfn >= 0x00100000UL)); | |
e5281ccd | 2197 | } |
426729dc KRW |
2198 | #ifdef CONFIG_SWIOTLB |
2199 | if (!swiotlb_nr_tbl()) | |
2200 | #endif | |
2201 | sg_mark_end(sg); | |
74ce6b6c CW |
2202 | obj->pages = st; |
2203 | ||
6dacfd2f | 2204 | if (i915_gem_object_needs_bit17_swizzle(obj)) |
e5281ccd CW |
2205 | i915_gem_object_do_bit_17_swizzle(obj); |
2206 | ||
656bfa3a DV |
2207 | if (obj->tiling_mode != I915_TILING_NONE && |
2208 | dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) | |
2209 | i915_gem_object_pin_pages(obj); | |
2210 | ||
e5281ccd CW |
2211 | return 0; |
2212 | ||
2213 | err_pages: | |
90797e6d ID |
2214 | sg_mark_end(sg); |
2215 | for_each_sg_page(st->sgl, &sg_iter, st->nents, 0) | |
2db76d7c | 2216 | page_cache_release(sg_page_iter_page(&sg_iter)); |
9da3da66 CW |
2217 | sg_free_table(st); |
2218 | kfree(st); | |
0820baf3 CW |
2219 | |
2220 | /* shmemfs first checks if there is enough memory to allocate the page | |
2221 | * and reports ENOSPC should there be insufficient, along with the usual | |
2222 | * ENOMEM for a genuine allocation failure. | |
2223 | * | |
2224 | * We use ENOSPC in our driver to mean that we have run out of aperture | |
2225 | * space and so want to translate the error from shmemfs back to our | |
2226 | * usual understanding of ENOMEM. | |
2227 | */ | |
2228 | if (PTR_ERR(page) == -ENOSPC) | |
2229 | return -ENOMEM; | |
2230 | else | |
2231 | return PTR_ERR(page); | |
673a394b EA |
2232 | } |
2233 | ||
37e680a1 CW |
2234 | /* Ensure that the associated pages are gathered from the backing storage |
2235 | * and pinned into our object. i915_gem_object_get_pages() may be called | |
2236 | * multiple times before they are released by a single call to | |
2237 | * i915_gem_object_put_pages() - once the pages are no longer referenced | |
2238 | * either as a result of memory pressure (reaping pages under the shrinker) | |
2239 | * or as the object is itself released. | |
2240 | */ | |
2241 | int | |
2242 | i915_gem_object_get_pages(struct drm_i915_gem_object *obj) | |
2243 | { | |
2244 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
2245 | const struct drm_i915_gem_object_ops *ops = obj->ops; | |
2246 | int ret; | |
2247 | ||
2f745ad3 | 2248 | if (obj->pages) |
37e680a1 CW |
2249 | return 0; |
2250 | ||
43e28f09 | 2251 | if (obj->madv != I915_MADV_WILLNEED) { |
bd9b6a4e | 2252 | DRM_DEBUG("Attempting to obtain a purgeable object\n"); |
8c99e57d | 2253 | return -EFAULT; |
43e28f09 CW |
2254 | } |
2255 | ||
a5570178 CW |
2256 | BUG_ON(obj->pages_pin_count); |
2257 | ||
37e680a1 CW |
2258 | ret = ops->get_pages(obj); |
2259 | if (ret) | |
2260 | return ret; | |
2261 | ||
35c20a60 | 2262 | list_add_tail(&obj->global_list, &dev_priv->mm.unbound_list); |
37e680a1 | 2263 | return 0; |
673a394b EA |
2264 | } |
2265 | ||
e2d05a8b | 2266 | static void |
05394f39 | 2267 | i915_gem_object_move_to_active(struct drm_i915_gem_object *obj, |
a4872ba6 | 2268 | struct intel_engine_cs *ring) |
673a394b | 2269 | { |
97b2a6a1 | 2270 | struct drm_i915_gem_request *req = intel_ring_get_request(ring); |
617dbe27 | 2271 | |
852835f3 | 2272 | BUG_ON(ring == NULL); |
97b2a6a1 JH |
2273 | if (obj->ring != ring && obj->last_write_req) { |
2274 | /* Keep the request relative to the current ring */ | |
2275 | i915_gem_request_assign(&obj->last_write_req, req); | |
02978ff5 | 2276 | } |
05394f39 | 2277 | obj->ring = ring; |
673a394b EA |
2278 | |
2279 | /* Add a reference if we're newly entering the active list. */ | |
05394f39 CW |
2280 | if (!obj->active) { |
2281 | drm_gem_object_reference(&obj->base); | |
2282 | obj->active = 1; | |
673a394b | 2283 | } |
e35a41de | 2284 | |
05394f39 | 2285 | list_move_tail(&obj->ring_list, &ring->active_list); |
caea7476 | 2286 | |
97b2a6a1 | 2287 | i915_gem_request_assign(&obj->last_read_req, req); |
caea7476 CW |
2288 | } |
2289 | ||
e2d05a8b | 2290 | void i915_vma_move_to_active(struct i915_vma *vma, |
a4872ba6 | 2291 | struct intel_engine_cs *ring) |
e2d05a8b BW |
2292 | { |
2293 | list_move_tail(&vma->mm_list, &vma->vm->active_list); | |
2294 | return i915_gem_object_move_to_active(vma->obj, ring); | |
2295 | } | |
2296 | ||
caea7476 | 2297 | static void |
caea7476 | 2298 | i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj) |
ce44b0ea | 2299 | { |
ca191b13 | 2300 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
feb822cf BW |
2301 | struct i915_address_space *vm; |
2302 | struct i915_vma *vma; | |
ce44b0ea | 2303 | |
65ce3027 | 2304 | BUG_ON(obj->base.write_domain & ~I915_GEM_GPU_DOMAINS); |
05394f39 | 2305 | BUG_ON(!obj->active); |
caea7476 | 2306 | |
feb822cf BW |
2307 | list_for_each_entry(vm, &dev_priv->vm_list, global_link) { |
2308 | vma = i915_gem_obj_to_vma(obj, vm); | |
2309 | if (vma && !list_empty(&vma->mm_list)) | |
2310 | list_move_tail(&vma->mm_list, &vm->inactive_list); | |
2311 | } | |
caea7476 | 2312 | |
f99d7069 DV |
2313 | intel_fb_obj_flush(obj, true); |
2314 | ||
65ce3027 | 2315 | list_del_init(&obj->ring_list); |
caea7476 CW |
2316 | obj->ring = NULL; |
2317 | ||
97b2a6a1 JH |
2318 | i915_gem_request_assign(&obj->last_read_req, NULL); |
2319 | i915_gem_request_assign(&obj->last_write_req, NULL); | |
65ce3027 CW |
2320 | obj->base.write_domain = 0; |
2321 | ||
97b2a6a1 | 2322 | i915_gem_request_assign(&obj->last_fenced_req, NULL); |
caea7476 CW |
2323 | |
2324 | obj->active = 0; | |
2325 | drm_gem_object_unreference(&obj->base); | |
2326 | ||
2327 | WARN_ON(i915_verify_lists(dev)); | |
ce44b0ea | 2328 | } |
673a394b | 2329 | |
c8725f3d CW |
2330 | static void |
2331 | i915_gem_object_retire(struct drm_i915_gem_object *obj) | |
2332 | { | |
a4872ba6 | 2333 | struct intel_engine_cs *ring = obj->ring; |
c8725f3d CW |
2334 | |
2335 | if (ring == NULL) | |
2336 | return; | |
2337 | ||
2338 | if (i915_seqno_passed(ring->get_seqno(ring, true), | |
97b2a6a1 | 2339 | i915_gem_request_get_seqno(obj->last_read_req))) |
c8725f3d CW |
2340 | i915_gem_object_move_to_inactive(obj); |
2341 | } | |
2342 | ||
9d773091 | 2343 | static int |
fca26bb4 | 2344 | i915_gem_init_seqno(struct drm_device *dev, u32 seqno) |
53d227f2 | 2345 | { |
9d773091 | 2346 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4872ba6 | 2347 | struct intel_engine_cs *ring; |
9d773091 | 2348 | int ret, i, j; |
53d227f2 | 2349 | |
107f27a5 | 2350 | /* Carefully retire all requests without writing to the rings */ |
9d773091 | 2351 | for_each_ring(ring, dev_priv, i) { |
107f27a5 CW |
2352 | ret = intel_ring_idle(ring); |
2353 | if (ret) | |
2354 | return ret; | |
9d773091 | 2355 | } |
9d773091 | 2356 | i915_gem_retire_requests(dev); |
107f27a5 CW |
2357 | |
2358 | /* Finally reset hw state */ | |
9d773091 | 2359 | for_each_ring(ring, dev_priv, i) { |
fca26bb4 | 2360 | intel_ring_init_seqno(ring, seqno); |
498d2ac1 | 2361 | |
ebc348b2 BW |
2362 | for (j = 0; j < ARRAY_SIZE(ring->semaphore.sync_seqno); j++) |
2363 | ring->semaphore.sync_seqno[j] = 0; | |
9d773091 | 2364 | } |
53d227f2 | 2365 | |
9d773091 | 2366 | return 0; |
53d227f2 DV |
2367 | } |
2368 | ||
fca26bb4 MK |
2369 | int i915_gem_set_seqno(struct drm_device *dev, u32 seqno) |
2370 | { | |
2371 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2372 | int ret; | |
2373 | ||
2374 | if (seqno == 0) | |
2375 | return -EINVAL; | |
2376 | ||
2377 | /* HWS page needs to be set less than what we | |
2378 | * will inject to ring | |
2379 | */ | |
2380 | ret = i915_gem_init_seqno(dev, seqno - 1); | |
2381 | if (ret) | |
2382 | return ret; | |
2383 | ||
2384 | /* Carefully set the last_seqno value so that wrap | |
2385 | * detection still works | |
2386 | */ | |
2387 | dev_priv->next_seqno = seqno; | |
2388 | dev_priv->last_seqno = seqno - 1; | |
2389 | if (dev_priv->last_seqno == 0) | |
2390 | dev_priv->last_seqno--; | |
2391 | ||
2392 | return 0; | |
2393 | } | |
2394 | ||
9d773091 CW |
2395 | int |
2396 | i915_gem_get_seqno(struct drm_device *dev, u32 *seqno) | |
53d227f2 | 2397 | { |
9d773091 CW |
2398 | struct drm_i915_private *dev_priv = dev->dev_private; |
2399 | ||
2400 | /* reserve 0 for non-seqno */ | |
2401 | if (dev_priv->next_seqno == 0) { | |
fca26bb4 | 2402 | int ret = i915_gem_init_seqno(dev, 0); |
9d773091 CW |
2403 | if (ret) |
2404 | return ret; | |
53d227f2 | 2405 | |
9d773091 CW |
2406 | dev_priv->next_seqno = 1; |
2407 | } | |
53d227f2 | 2408 | |
f72b3435 | 2409 | *seqno = dev_priv->last_seqno = dev_priv->next_seqno++; |
9d773091 | 2410 | return 0; |
53d227f2 DV |
2411 | } |
2412 | ||
a4872ba6 | 2413 | int __i915_add_request(struct intel_engine_cs *ring, |
0025c077 | 2414 | struct drm_file *file, |
7d736f4f | 2415 | struct drm_i915_gem_object *obj, |
0025c077 | 2416 | u32 *out_seqno) |
673a394b | 2417 | { |
3e31c6c0 | 2418 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
acb868d3 | 2419 | struct drm_i915_gem_request *request; |
48e29f55 | 2420 | struct intel_ringbuffer *ringbuf; |
7d736f4f | 2421 | u32 request_ring_position, request_start; |
3cce469c CW |
2422 | int ret; |
2423 | ||
48e29f55 OM |
2424 | request = ring->preallocated_lazy_request; |
2425 | if (WARN_ON(request == NULL)) | |
2426 | return -ENOMEM; | |
2427 | ||
2428 | if (i915.enable_execlists) { | |
2429 | struct intel_context *ctx = request->ctx; | |
2430 | ringbuf = ctx->engine[ring->id].ringbuf; | |
2431 | } else | |
2432 | ringbuf = ring->buffer; | |
2433 | ||
2434 | request_start = intel_ring_get_tail(ringbuf); | |
cc889e0f DV |
2435 | /* |
2436 | * Emit any outstanding flushes - execbuf can fail to emit the flush | |
2437 | * after having emitted the batchbuffer command. Hence we need to fix | |
2438 | * things up similar to emitting the lazy request. The difference here | |
2439 | * is that the flush _must_ happen before the next request, no matter | |
2440 | * what. | |
2441 | */ | |
48e29f55 OM |
2442 | if (i915.enable_execlists) { |
2443 | ret = logical_ring_flush_all_caches(ringbuf); | |
2444 | if (ret) | |
2445 | return ret; | |
2446 | } else { | |
2447 | ret = intel_ring_flush_all_caches(ring); | |
2448 | if (ret) | |
2449 | return ret; | |
2450 | } | |
cc889e0f | 2451 | |
a71d8d94 CW |
2452 | /* Record the position of the start of the request so that |
2453 | * should we detect the updated seqno part-way through the | |
2454 | * GPU processing the request, we never over-estimate the | |
2455 | * position of the head. | |
2456 | */ | |
48e29f55 | 2457 | request_ring_position = intel_ring_get_tail(ringbuf); |
a71d8d94 | 2458 | |
48e29f55 OM |
2459 | if (i915.enable_execlists) { |
2460 | ret = ring->emit_request(ringbuf); | |
2461 | if (ret) | |
2462 | return ret; | |
2463 | } else { | |
2464 | ret = ring->add_request(ring); | |
2465 | if (ret) | |
2466 | return ret; | |
2467 | } | |
673a394b | 2468 | |
9d773091 | 2469 | request->seqno = intel_ring_get_seqno(ring); |
852835f3 | 2470 | request->ring = ring; |
7d736f4f | 2471 | request->head = request_start; |
a71d8d94 | 2472 | request->tail = request_ring_position; |
7d736f4f MK |
2473 | |
2474 | /* Whilst this request exists, batch_obj will be on the | |
2475 | * active_list, and so will hold the active reference. Only when this | |
2476 | * request is retired will the the batch_obj be moved onto the | |
2477 | * inactive_list and lose its active reference. Hence we do not need | |
2478 | * to explicitly hold another reference here. | |
2479 | */ | |
9a7e0c2a | 2480 | request->batch_obj = obj; |
0e50e96b | 2481 | |
48e29f55 OM |
2482 | if (!i915.enable_execlists) { |
2483 | /* Hold a reference to the current context so that we can inspect | |
2484 | * it later in case a hangcheck error event fires. | |
2485 | */ | |
2486 | request->ctx = ring->last_context; | |
2487 | if (request->ctx) | |
2488 | i915_gem_context_reference(request->ctx); | |
2489 | } | |
0e50e96b | 2490 | |
673a394b | 2491 | request->emitted_jiffies = jiffies; |
852835f3 | 2492 | list_add_tail(&request->list, &ring->request_list); |
3bb73aba | 2493 | request->file_priv = NULL; |
852835f3 | 2494 | |
db53a302 CW |
2495 | if (file) { |
2496 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
2497 | ||
1c25595f | 2498 | spin_lock(&file_priv->mm.lock); |
f787a5f5 | 2499 | request->file_priv = file_priv; |
b962442e | 2500 | list_add_tail(&request->client_list, |
f787a5f5 | 2501 | &file_priv->mm.request_list); |
1c25595f | 2502 | spin_unlock(&file_priv->mm.lock); |
b962442e | 2503 | } |
673a394b | 2504 | |
9d773091 | 2505 | trace_i915_gem_request_add(ring, request->seqno); |
1823521d | 2506 | ring->outstanding_lazy_seqno = 0; |
3c0e234c | 2507 | ring->preallocated_lazy_request = NULL; |
db53a302 | 2508 | |
87255483 | 2509 | i915_queue_hangcheck(ring->dev); |
10cd45b6 | 2510 | |
87255483 DV |
2511 | cancel_delayed_work_sync(&dev_priv->mm.idle_work); |
2512 | queue_delayed_work(dev_priv->wq, | |
2513 | &dev_priv->mm.retire_work, | |
2514 | round_jiffies_up_relative(HZ)); | |
2515 | intel_mark_busy(dev_priv->dev); | |
cc889e0f | 2516 | |
acb868d3 | 2517 | if (out_seqno) |
9d773091 | 2518 | *out_seqno = request->seqno; |
3cce469c | 2519 | return 0; |
673a394b EA |
2520 | } |
2521 | ||
f787a5f5 CW |
2522 | static inline void |
2523 | i915_gem_request_remove_from_client(struct drm_i915_gem_request *request) | |
673a394b | 2524 | { |
1c25595f | 2525 | struct drm_i915_file_private *file_priv = request->file_priv; |
673a394b | 2526 | |
1c25595f CW |
2527 | if (!file_priv) |
2528 | return; | |
1c5d22f7 | 2529 | |
1c25595f | 2530 | spin_lock(&file_priv->mm.lock); |
b29c19b6 CW |
2531 | list_del(&request->client_list); |
2532 | request->file_priv = NULL; | |
1c25595f | 2533 | spin_unlock(&file_priv->mm.lock); |
673a394b | 2534 | } |
673a394b | 2535 | |
939fd762 | 2536 | static bool i915_context_is_banned(struct drm_i915_private *dev_priv, |
273497e5 | 2537 | const struct intel_context *ctx) |
be62acb4 | 2538 | { |
44e2c070 | 2539 | unsigned long elapsed; |
be62acb4 | 2540 | |
44e2c070 MK |
2541 | elapsed = get_seconds() - ctx->hang_stats.guilty_ts; |
2542 | ||
2543 | if (ctx->hang_stats.banned) | |
be62acb4 MK |
2544 | return true; |
2545 | ||
2546 | if (elapsed <= DRM_I915_CTX_BAN_PERIOD) { | |
ccc7bed0 | 2547 | if (!i915_gem_context_is_default(ctx)) { |
3fac8978 | 2548 | DRM_DEBUG("context hanging too fast, banning!\n"); |
ccc7bed0 | 2549 | return true; |
88b4aa87 MK |
2550 | } else if (i915_stop_ring_allow_ban(dev_priv)) { |
2551 | if (i915_stop_ring_allow_warn(dev_priv)) | |
2552 | DRM_ERROR("gpu hanging too fast, banning!\n"); | |
ccc7bed0 | 2553 | return true; |
3fac8978 | 2554 | } |
be62acb4 MK |
2555 | } |
2556 | ||
2557 | return false; | |
2558 | } | |
2559 | ||
939fd762 | 2560 | static void i915_set_reset_status(struct drm_i915_private *dev_priv, |
273497e5 | 2561 | struct intel_context *ctx, |
b6b0fac0 | 2562 | const bool guilty) |
aa60c664 | 2563 | { |
44e2c070 MK |
2564 | struct i915_ctx_hang_stats *hs; |
2565 | ||
2566 | if (WARN_ON(!ctx)) | |
2567 | return; | |
aa60c664 | 2568 | |
44e2c070 MK |
2569 | hs = &ctx->hang_stats; |
2570 | ||
2571 | if (guilty) { | |
939fd762 | 2572 | hs->banned = i915_context_is_banned(dev_priv, ctx); |
44e2c070 MK |
2573 | hs->batch_active++; |
2574 | hs->guilty_ts = get_seconds(); | |
2575 | } else { | |
2576 | hs->batch_pending++; | |
aa60c664 MK |
2577 | } |
2578 | } | |
2579 | ||
0e50e96b MK |
2580 | static void i915_gem_free_request(struct drm_i915_gem_request *request) |
2581 | { | |
2582 | list_del(&request->list); | |
2583 | i915_gem_request_remove_from_client(request); | |
2584 | ||
abfe262a JH |
2585 | i915_gem_request_unreference(request); |
2586 | } | |
2587 | ||
2588 | void i915_gem_request_free(struct kref *req_ref) | |
2589 | { | |
2590 | struct drm_i915_gem_request *req = container_of(req_ref, | |
2591 | typeof(*req), ref); | |
2592 | struct intel_context *ctx = req->ctx; | |
2593 | ||
0794aed3 TD |
2594 | if (ctx) { |
2595 | if (i915.enable_execlists) { | |
abfe262a | 2596 | struct intel_engine_cs *ring = req->ring; |
0e50e96b | 2597 | |
0794aed3 TD |
2598 | if (ctx != ring->default_context) |
2599 | intel_lr_context_unpin(ring, ctx); | |
2600 | } | |
abfe262a | 2601 | |
dcb4c12a OM |
2602 | i915_gem_context_unreference(ctx); |
2603 | } | |
abfe262a JH |
2604 | |
2605 | kfree(req); | |
0e50e96b MK |
2606 | } |
2607 | ||
8d9fc7fd | 2608 | struct drm_i915_gem_request * |
a4872ba6 | 2609 | i915_gem_find_active_request(struct intel_engine_cs *ring) |
9375e446 | 2610 | { |
4db080f9 | 2611 | struct drm_i915_gem_request *request; |
8d9fc7fd CW |
2612 | u32 completed_seqno; |
2613 | ||
2614 | completed_seqno = ring->get_seqno(ring, false); | |
4db080f9 CW |
2615 | |
2616 | list_for_each_entry(request, &ring->request_list, list) { | |
2617 | if (i915_seqno_passed(completed_seqno, request->seqno)) | |
2618 | continue; | |
aa60c664 | 2619 | |
b6b0fac0 | 2620 | return request; |
4db080f9 | 2621 | } |
b6b0fac0 MK |
2622 | |
2623 | return NULL; | |
2624 | } | |
2625 | ||
2626 | static void i915_gem_reset_ring_status(struct drm_i915_private *dev_priv, | |
a4872ba6 | 2627 | struct intel_engine_cs *ring) |
b6b0fac0 MK |
2628 | { |
2629 | struct drm_i915_gem_request *request; | |
2630 | bool ring_hung; | |
2631 | ||
8d9fc7fd | 2632 | request = i915_gem_find_active_request(ring); |
b6b0fac0 MK |
2633 | |
2634 | if (request == NULL) | |
2635 | return; | |
2636 | ||
2637 | ring_hung = ring->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG; | |
2638 | ||
939fd762 | 2639 | i915_set_reset_status(dev_priv, request->ctx, ring_hung); |
b6b0fac0 MK |
2640 | |
2641 | list_for_each_entry_continue(request, &ring->request_list, list) | |
939fd762 | 2642 | i915_set_reset_status(dev_priv, request->ctx, false); |
4db080f9 | 2643 | } |
aa60c664 | 2644 | |
4db080f9 | 2645 | static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv, |
a4872ba6 | 2646 | struct intel_engine_cs *ring) |
4db080f9 | 2647 | { |
dfaae392 | 2648 | while (!list_empty(&ring->active_list)) { |
05394f39 | 2649 | struct drm_i915_gem_object *obj; |
9375e446 | 2650 | |
05394f39 CW |
2651 | obj = list_first_entry(&ring->active_list, |
2652 | struct drm_i915_gem_object, | |
2653 | ring_list); | |
9375e446 | 2654 | |
05394f39 | 2655 | i915_gem_object_move_to_inactive(obj); |
673a394b | 2656 | } |
1d62beea | 2657 | |
dcb4c12a OM |
2658 | /* |
2659 | * Clear the execlists queue up before freeing the requests, as those | |
2660 | * are the ones that keep the context and ringbuffer backing objects | |
2661 | * pinned in place. | |
2662 | */ | |
2663 | while (!list_empty(&ring->execlist_queue)) { | |
2664 | struct intel_ctx_submit_request *submit_req; | |
2665 | ||
2666 | submit_req = list_first_entry(&ring->execlist_queue, | |
2667 | struct intel_ctx_submit_request, | |
2668 | execlist_link); | |
2669 | list_del(&submit_req->execlist_link); | |
2670 | intel_runtime_pm_put(dev_priv); | |
2671 | i915_gem_context_unreference(submit_req->ctx); | |
2672 | kfree(submit_req); | |
2673 | } | |
2674 | ||
1d62beea BW |
2675 | /* |
2676 | * We must free the requests after all the corresponding objects have | |
2677 | * been moved off active lists. Which is the same order as the normal | |
2678 | * retire_requests function does. This is important if object hold | |
2679 | * implicit references on things like e.g. ppgtt address spaces through | |
2680 | * the request. | |
2681 | */ | |
2682 | while (!list_empty(&ring->request_list)) { | |
2683 | struct drm_i915_gem_request *request; | |
2684 | ||
2685 | request = list_first_entry(&ring->request_list, | |
2686 | struct drm_i915_gem_request, | |
2687 | list); | |
2688 | ||
2689 | i915_gem_free_request(request); | |
2690 | } | |
e3efda49 CW |
2691 | |
2692 | /* These may not have been flush before the reset, do so now */ | |
abfe262a | 2693 | i915_gem_request_assign(&ring->preallocated_lazy_request, NULL); |
e3efda49 | 2694 | ring->outstanding_lazy_seqno = 0; |
673a394b EA |
2695 | } |
2696 | ||
19b2dbde | 2697 | void i915_gem_restore_fences(struct drm_device *dev) |
312817a3 CW |
2698 | { |
2699 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2700 | int i; | |
2701 | ||
4b9de737 | 2702 | for (i = 0; i < dev_priv->num_fence_regs; i++) { |
312817a3 | 2703 | struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i]; |
7d2cb39c | 2704 | |
94a335db DV |
2705 | /* |
2706 | * Commit delayed tiling changes if we have an object still | |
2707 | * attached to the fence, otherwise just clear the fence. | |
2708 | */ | |
2709 | if (reg->obj) { | |
2710 | i915_gem_object_update_fence(reg->obj, reg, | |
2711 | reg->obj->tiling_mode); | |
2712 | } else { | |
2713 | i915_gem_write_fence(dev, i, NULL); | |
2714 | } | |
312817a3 CW |
2715 | } |
2716 | } | |
2717 | ||
069efc1d | 2718 | void i915_gem_reset(struct drm_device *dev) |
673a394b | 2719 | { |
77f01230 | 2720 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4872ba6 | 2721 | struct intel_engine_cs *ring; |
1ec14ad3 | 2722 | int i; |
673a394b | 2723 | |
4db080f9 CW |
2724 | /* |
2725 | * Before we free the objects from the requests, we need to inspect | |
2726 | * them for finding the guilty party. As the requests only borrow | |
2727 | * their reference to the objects, the inspection must be done first. | |
2728 | */ | |
2729 | for_each_ring(ring, dev_priv, i) | |
2730 | i915_gem_reset_ring_status(dev_priv, ring); | |
2731 | ||
b4519513 | 2732 | for_each_ring(ring, dev_priv, i) |
4db080f9 | 2733 | i915_gem_reset_ring_cleanup(dev_priv, ring); |
dfaae392 | 2734 | |
acce9ffa BW |
2735 | i915_gem_context_reset(dev); |
2736 | ||
19b2dbde | 2737 | i915_gem_restore_fences(dev); |
673a394b EA |
2738 | } |
2739 | ||
2740 | /** | |
2741 | * This function clears the request list as sequence numbers are passed. | |
2742 | */ | |
1cf0ba14 | 2743 | void |
a4872ba6 | 2744 | i915_gem_retire_requests_ring(struct intel_engine_cs *ring) |
673a394b | 2745 | { |
673a394b EA |
2746 | uint32_t seqno; |
2747 | ||
db53a302 | 2748 | if (list_empty(&ring->request_list)) |
6c0594a3 KW |
2749 | return; |
2750 | ||
db53a302 | 2751 | WARN_ON(i915_verify_lists(ring->dev)); |
673a394b | 2752 | |
b2eadbc8 | 2753 | seqno = ring->get_seqno(ring, true); |
1ec14ad3 | 2754 | |
e9103038 CW |
2755 | /* Move any buffers on the active list that are no longer referenced |
2756 | * by the ringbuffer to the flushing/inactive lists as appropriate, | |
2757 | * before we free the context associated with the requests. | |
2758 | */ | |
2759 | while (!list_empty(&ring->active_list)) { | |
2760 | struct drm_i915_gem_object *obj; | |
2761 | ||
2762 | obj = list_first_entry(&ring->active_list, | |
2763 | struct drm_i915_gem_object, | |
2764 | ring_list); | |
2765 | ||
97b2a6a1 JH |
2766 | if (!i915_seqno_passed(seqno, |
2767 | i915_gem_request_get_seqno(obj->last_read_req))) | |
e9103038 CW |
2768 | break; |
2769 | ||
2770 | i915_gem_object_move_to_inactive(obj); | |
2771 | } | |
2772 | ||
2773 | ||
852835f3 | 2774 | while (!list_empty(&ring->request_list)) { |
673a394b | 2775 | struct drm_i915_gem_request *request; |
48e29f55 | 2776 | struct intel_ringbuffer *ringbuf; |
673a394b | 2777 | |
852835f3 | 2778 | request = list_first_entry(&ring->request_list, |
673a394b EA |
2779 | struct drm_i915_gem_request, |
2780 | list); | |
673a394b | 2781 | |
dfaae392 | 2782 | if (!i915_seqno_passed(seqno, request->seqno)) |
b84d5f0c CW |
2783 | break; |
2784 | ||
db53a302 | 2785 | trace_i915_gem_request_retire(ring, request->seqno); |
48e29f55 OM |
2786 | |
2787 | /* This is one of the few common intersection points | |
2788 | * between legacy ringbuffer submission and execlists: | |
2789 | * we need to tell them apart in order to find the correct | |
2790 | * ringbuffer to which the request belongs to. | |
2791 | */ | |
2792 | if (i915.enable_execlists) { | |
2793 | struct intel_context *ctx = request->ctx; | |
2794 | ringbuf = ctx->engine[ring->id].ringbuf; | |
2795 | } else | |
2796 | ringbuf = ring->buffer; | |
2797 | ||
a71d8d94 CW |
2798 | /* We know the GPU must have read the request to have |
2799 | * sent us the seqno + interrupt, so use the position | |
2800 | * of tail of the request to update the last known position | |
2801 | * of the GPU head. | |
2802 | */ | |
48e29f55 | 2803 | ringbuf->last_retired_head = request->tail; |
b84d5f0c | 2804 | |
0e50e96b | 2805 | i915_gem_free_request(request); |
b84d5f0c | 2806 | } |
673a394b | 2807 | |
db53a302 CW |
2808 | if (unlikely(ring->trace_irq_seqno && |
2809 | i915_seqno_passed(seqno, ring->trace_irq_seqno))) { | |
1ec14ad3 | 2810 | ring->irq_put(ring); |
db53a302 | 2811 | ring->trace_irq_seqno = 0; |
9d34e5db | 2812 | } |
23bc5982 | 2813 | |
db53a302 | 2814 | WARN_ON(i915_verify_lists(ring->dev)); |
673a394b EA |
2815 | } |
2816 | ||
b29c19b6 | 2817 | bool |
b09a1fec CW |
2818 | i915_gem_retire_requests(struct drm_device *dev) |
2819 | { | |
3e31c6c0 | 2820 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4872ba6 | 2821 | struct intel_engine_cs *ring; |
b29c19b6 | 2822 | bool idle = true; |
1ec14ad3 | 2823 | int i; |
b09a1fec | 2824 | |
b29c19b6 | 2825 | for_each_ring(ring, dev_priv, i) { |
b4519513 | 2826 | i915_gem_retire_requests_ring(ring); |
b29c19b6 | 2827 | idle &= list_empty(&ring->request_list); |
c86ee3a9 TD |
2828 | if (i915.enable_execlists) { |
2829 | unsigned long flags; | |
2830 | ||
2831 | spin_lock_irqsave(&ring->execlist_lock, flags); | |
2832 | idle &= list_empty(&ring->execlist_queue); | |
2833 | spin_unlock_irqrestore(&ring->execlist_lock, flags); | |
2834 | ||
2835 | intel_execlists_retire_requests(ring); | |
2836 | } | |
b29c19b6 CW |
2837 | } |
2838 | ||
2839 | if (idle) | |
2840 | mod_delayed_work(dev_priv->wq, | |
2841 | &dev_priv->mm.idle_work, | |
2842 | msecs_to_jiffies(100)); | |
2843 | ||
2844 | return idle; | |
b09a1fec CW |
2845 | } |
2846 | ||
75ef9da2 | 2847 | static void |
673a394b EA |
2848 | i915_gem_retire_work_handler(struct work_struct *work) |
2849 | { | |
b29c19b6 CW |
2850 | struct drm_i915_private *dev_priv = |
2851 | container_of(work, typeof(*dev_priv), mm.retire_work.work); | |
2852 | struct drm_device *dev = dev_priv->dev; | |
0a58705b | 2853 | bool idle; |
673a394b | 2854 | |
891b48cf | 2855 | /* Come back later if the device is busy... */ |
b29c19b6 CW |
2856 | idle = false; |
2857 | if (mutex_trylock(&dev->struct_mutex)) { | |
2858 | idle = i915_gem_retire_requests(dev); | |
2859 | mutex_unlock(&dev->struct_mutex); | |
673a394b | 2860 | } |
b29c19b6 | 2861 | if (!idle) |
bcb45086 CW |
2862 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, |
2863 | round_jiffies_up_relative(HZ)); | |
b29c19b6 | 2864 | } |
0a58705b | 2865 | |
b29c19b6 CW |
2866 | static void |
2867 | i915_gem_idle_work_handler(struct work_struct *work) | |
2868 | { | |
2869 | struct drm_i915_private *dev_priv = | |
2870 | container_of(work, typeof(*dev_priv), mm.idle_work.work); | |
2871 | ||
2872 | intel_mark_idle(dev_priv->dev); | |
673a394b EA |
2873 | } |
2874 | ||
30dfebf3 DV |
2875 | /** |
2876 | * Ensures that an object will eventually get non-busy by flushing any required | |
2877 | * write domains, emitting any outstanding lazy request and retiring and | |
2878 | * completed requests. | |
2879 | */ | |
2880 | static int | |
2881 | i915_gem_object_flush_active(struct drm_i915_gem_object *obj) | |
2882 | { | |
2883 | int ret; | |
2884 | ||
2885 | if (obj->active) { | |
97b2a6a1 JH |
2886 | ret = i915_gem_check_olr(obj->ring, |
2887 | i915_gem_request_get_seqno(obj->last_read_req)); | |
30dfebf3 DV |
2888 | if (ret) |
2889 | return ret; | |
2890 | ||
30dfebf3 DV |
2891 | i915_gem_retire_requests_ring(obj->ring); |
2892 | } | |
2893 | ||
2894 | return 0; | |
2895 | } | |
2896 | ||
23ba4fd0 BW |
2897 | /** |
2898 | * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT | |
2899 | * @DRM_IOCTL_ARGS: standard ioctl arguments | |
2900 | * | |
2901 | * Returns 0 if successful, else an error is returned with the remaining time in | |
2902 | * the timeout parameter. | |
2903 | * -ETIME: object is still busy after timeout | |
2904 | * -ERESTARTSYS: signal interrupted the wait | |
2905 | * -ENONENT: object doesn't exist | |
2906 | * Also possible, but rare: | |
2907 | * -EAGAIN: GPU wedged | |
2908 | * -ENOMEM: damn | |
2909 | * -ENODEV: Internal IRQ fail | |
2910 | * -E?: The add request failed | |
2911 | * | |
2912 | * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any | |
2913 | * non-zero timeout parameter the wait ioctl will wait for the given number of | |
2914 | * nanoseconds on an object becoming unbusy. Since the wait itself does so | |
2915 | * without holding struct_mutex the object may become re-busied before this | |
2916 | * function completes. A similar but shorter * race condition exists in the busy | |
2917 | * ioctl | |
2918 | */ | |
2919 | int | |
2920 | i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) | |
2921 | { | |
3e31c6c0 | 2922 | struct drm_i915_private *dev_priv = dev->dev_private; |
23ba4fd0 BW |
2923 | struct drm_i915_gem_wait *args = data; |
2924 | struct drm_i915_gem_object *obj; | |
ff865885 | 2925 | struct drm_i915_gem_request *req; |
a4872ba6 | 2926 | struct intel_engine_cs *ring = NULL; |
f69061be | 2927 | unsigned reset_counter; |
23ba4fd0 BW |
2928 | u32 seqno = 0; |
2929 | int ret = 0; | |
2930 | ||
11b5d511 DV |
2931 | if (args->flags != 0) |
2932 | return -EINVAL; | |
2933 | ||
23ba4fd0 BW |
2934 | ret = i915_mutex_lock_interruptible(dev); |
2935 | if (ret) | |
2936 | return ret; | |
2937 | ||
2938 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->bo_handle)); | |
2939 | if (&obj->base == NULL) { | |
2940 | mutex_unlock(&dev->struct_mutex); | |
2941 | return -ENOENT; | |
2942 | } | |
2943 | ||
30dfebf3 DV |
2944 | /* Need to make sure the object gets inactive eventually. */ |
2945 | ret = i915_gem_object_flush_active(obj); | |
23ba4fd0 BW |
2946 | if (ret) |
2947 | goto out; | |
2948 | ||
97b2a6a1 JH |
2949 | if (!obj->active || !obj->last_read_req) |
2950 | goto out; | |
23ba4fd0 | 2951 | |
ff865885 JH |
2952 | req = obj->last_read_req; |
2953 | seqno = i915_gem_request_get_seqno(req); | |
97b2a6a1 JH |
2954 | WARN_ON(seqno == 0); |
2955 | ring = obj->ring; | |
23ba4fd0 | 2956 | |
23ba4fd0 | 2957 | /* Do this after OLR check to make sure we make forward progress polling |
5ed0bdf2 | 2958 | * on this IOCTL with a timeout <=0 (like busy ioctl) |
23ba4fd0 | 2959 | */ |
5ed0bdf2 | 2960 | if (args->timeout_ns <= 0) { |
23ba4fd0 BW |
2961 | ret = -ETIME; |
2962 | goto out; | |
2963 | } | |
2964 | ||
2965 | drm_gem_object_unreference(&obj->base); | |
f69061be | 2966 | reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); |
ff865885 | 2967 | i915_gem_request_reference(req); |
23ba4fd0 BW |
2968 | mutex_unlock(&dev->struct_mutex); |
2969 | ||
ff865885 JH |
2970 | ret = __i915_wait_seqno(ring, seqno, reset_counter, true, &args->timeout_ns, |
2971 | file->driver_priv); | |
2972 | mutex_lock(&dev->struct_mutex); | |
2973 | i915_gem_request_unreference(req); | |
2974 | mutex_unlock(&dev->struct_mutex); | |
2975 | return ret; | |
23ba4fd0 BW |
2976 | |
2977 | out: | |
2978 | drm_gem_object_unreference(&obj->base); | |
2979 | mutex_unlock(&dev->struct_mutex); | |
2980 | return ret; | |
2981 | } | |
2982 | ||
5816d648 BW |
2983 | /** |
2984 | * i915_gem_object_sync - sync an object to a ring. | |
2985 | * | |
2986 | * @obj: object which may be in use on another ring. | |
2987 | * @to: ring we wish to use the object on. May be NULL. | |
2988 | * | |
2989 | * This code is meant to abstract object synchronization with the GPU. | |
2990 | * Calling with NULL implies synchronizing the object with the CPU | |
2991 | * rather than a particular GPU ring. | |
2992 | * | |
2993 | * Returns 0 if successful, else propagates up the lower layer error. | |
2994 | */ | |
2911a35b BW |
2995 | int |
2996 | i915_gem_object_sync(struct drm_i915_gem_object *obj, | |
a4872ba6 | 2997 | struct intel_engine_cs *to) |
2911a35b | 2998 | { |
a4872ba6 | 2999 | struct intel_engine_cs *from = obj->ring; |
2911a35b BW |
3000 | u32 seqno; |
3001 | int ret, idx; | |
3002 | ||
3003 | if (from == NULL || to == from) | |
3004 | return 0; | |
3005 | ||
5816d648 | 3006 | if (to == NULL || !i915_semaphore_is_enabled(obj->base.dev)) |
0201f1ec | 3007 | return i915_gem_object_wait_rendering(obj, false); |
2911a35b BW |
3008 | |
3009 | idx = intel_ring_sync_index(from, to); | |
3010 | ||
97b2a6a1 | 3011 | seqno = i915_gem_request_get_seqno(obj->last_read_req); |
ddd4dbc6 RV |
3012 | /* Optimization: Avoid semaphore sync when we are sure we already |
3013 | * waited for an object with higher seqno */ | |
ebc348b2 | 3014 | if (seqno <= from->semaphore.sync_seqno[idx]) |
2911a35b BW |
3015 | return 0; |
3016 | ||
b4aca010 BW |
3017 | ret = i915_gem_check_olr(obj->ring, seqno); |
3018 | if (ret) | |
3019 | return ret; | |
2911a35b | 3020 | |
b52b89da | 3021 | trace_i915_gem_ring_sync_to(from, to, seqno); |
ebc348b2 | 3022 | ret = to->semaphore.sync_to(to, from, seqno); |
e3a5a225 | 3023 | if (!ret) |
97b2a6a1 | 3024 | /* We use last_read_req because sync_to() |
7b01e260 MK |
3025 | * might have just caused seqno wrap under |
3026 | * the radar. | |
3027 | */ | |
97b2a6a1 JH |
3028 | from->semaphore.sync_seqno[idx] = |
3029 | i915_gem_request_get_seqno(obj->last_read_req); | |
2911a35b | 3030 | |
e3a5a225 | 3031 | return ret; |
2911a35b BW |
3032 | } |
3033 | ||
b5ffc9bc CW |
3034 | static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj) |
3035 | { | |
3036 | u32 old_write_domain, old_read_domains; | |
3037 | ||
b5ffc9bc CW |
3038 | /* Force a pagefault for domain tracking on next user access */ |
3039 | i915_gem_release_mmap(obj); | |
3040 | ||
b97c3d9c KP |
3041 | if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) |
3042 | return; | |
3043 | ||
97c809fd CW |
3044 | /* Wait for any direct GTT access to complete */ |
3045 | mb(); | |
3046 | ||
b5ffc9bc CW |
3047 | old_read_domains = obj->base.read_domains; |
3048 | old_write_domain = obj->base.write_domain; | |
3049 | ||
3050 | obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT; | |
3051 | obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT; | |
3052 | ||
3053 | trace_i915_gem_object_change_domain(obj, | |
3054 | old_read_domains, | |
3055 | old_write_domain); | |
3056 | } | |
3057 | ||
07fe0b12 | 3058 | int i915_vma_unbind(struct i915_vma *vma) |
673a394b | 3059 | { |
07fe0b12 | 3060 | struct drm_i915_gem_object *obj = vma->obj; |
3e31c6c0 | 3061 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
43e28f09 | 3062 | int ret; |
673a394b | 3063 | |
07fe0b12 | 3064 | if (list_empty(&vma->vma_link)) |
673a394b EA |
3065 | return 0; |
3066 | ||
0ff501cb DV |
3067 | if (!drm_mm_node_allocated(&vma->node)) { |
3068 | i915_gem_vma_destroy(vma); | |
0ff501cb DV |
3069 | return 0; |
3070 | } | |
433544bd | 3071 | |
d7f46fc4 | 3072 | if (vma->pin_count) |
31d8d651 | 3073 | return -EBUSY; |
673a394b | 3074 | |
c4670ad0 CW |
3075 | BUG_ON(obj->pages == NULL); |
3076 | ||
a8198eea | 3077 | ret = i915_gem_object_finish_gpu(obj); |
1488fc08 | 3078 | if (ret) |
a8198eea CW |
3079 | return ret; |
3080 | /* Continue on if we fail due to EIO, the GPU is hung so we | |
3081 | * should be safe and we need to cleanup or else we might | |
3082 | * cause memory corruption through use-after-free. | |
3083 | */ | |
3084 | ||
1d1ef21d CW |
3085 | /* Throw away the active reference before moving to the unbound list */ |
3086 | i915_gem_object_retire(obj); | |
3087 | ||
8b1bc9b4 DV |
3088 | if (i915_is_ggtt(vma->vm)) { |
3089 | i915_gem_object_finish_gtt(obj); | |
5323fd04 | 3090 | |
8b1bc9b4 DV |
3091 | /* release the fence reg _after_ flushing */ |
3092 | ret = i915_gem_object_put_fence(obj); | |
3093 | if (ret) | |
3094 | return ret; | |
3095 | } | |
96b47b65 | 3096 | |
07fe0b12 | 3097 | trace_i915_vma_unbind(vma); |
db53a302 | 3098 | |
6f65e29a BW |
3099 | vma->unbind_vma(vma); |
3100 | ||
64bf9303 | 3101 | list_del_init(&vma->mm_list); |
5cacaac7 | 3102 | if (i915_is_ggtt(vma->vm)) |
e6a84468 | 3103 | obj->map_and_fenceable = false; |
673a394b | 3104 | |
2f633156 BW |
3105 | drm_mm_remove_node(&vma->node); |
3106 | i915_gem_vma_destroy(vma); | |
3107 | ||
3108 | /* Since the unbound list is global, only move to that list if | |
b93dab6e | 3109 | * no more VMAs exist. */ |
9490edb5 AR |
3110 | if (list_empty(&obj->vma_list)) { |
3111 | i915_gem_gtt_finish_object(obj); | |
2f633156 | 3112 | list_move_tail(&obj->global_list, &dev_priv->mm.unbound_list); |
9490edb5 | 3113 | } |
673a394b | 3114 | |
70903c3b CW |
3115 | /* And finally now the object is completely decoupled from this vma, |
3116 | * we can drop its hold on the backing storage and allow it to be | |
3117 | * reaped by the shrinker. | |
3118 | */ | |
3119 | i915_gem_object_unpin_pages(obj); | |
3120 | ||
88241785 | 3121 | return 0; |
54cf91dc CW |
3122 | } |
3123 | ||
b2da9fe5 | 3124 | int i915_gpu_idle(struct drm_device *dev) |
4df2faf4 | 3125 | { |
3e31c6c0 | 3126 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4872ba6 | 3127 | struct intel_engine_cs *ring; |
1ec14ad3 | 3128 | int ret, i; |
4df2faf4 | 3129 | |
4df2faf4 | 3130 | /* Flush everything onto the inactive list. */ |
b4519513 | 3131 | for_each_ring(ring, dev_priv, i) { |
ecdb5fd8 TD |
3132 | if (!i915.enable_execlists) { |
3133 | ret = i915_switch_context(ring, ring->default_context); | |
3134 | if (ret) | |
3135 | return ret; | |
3136 | } | |
b6c7488d | 3137 | |
3e960501 | 3138 | ret = intel_ring_idle(ring); |
1ec14ad3 CW |
3139 | if (ret) |
3140 | return ret; | |
3141 | } | |
4df2faf4 | 3142 | |
8a1a49f9 | 3143 | return 0; |
4df2faf4 DV |
3144 | } |
3145 | ||
9ce079e4 CW |
3146 | static void i965_write_fence_reg(struct drm_device *dev, int reg, |
3147 | struct drm_i915_gem_object *obj) | |
de151cf6 | 3148 | { |
3e31c6c0 | 3149 | struct drm_i915_private *dev_priv = dev->dev_private; |
56c844e5 ID |
3150 | int fence_reg; |
3151 | int fence_pitch_shift; | |
de151cf6 | 3152 | |
56c844e5 ID |
3153 | if (INTEL_INFO(dev)->gen >= 6) { |
3154 | fence_reg = FENCE_REG_SANDYBRIDGE_0; | |
3155 | fence_pitch_shift = SANDYBRIDGE_FENCE_PITCH_SHIFT; | |
3156 | } else { | |
3157 | fence_reg = FENCE_REG_965_0; | |
3158 | fence_pitch_shift = I965_FENCE_PITCH_SHIFT; | |
3159 | } | |
3160 | ||
d18b9619 CW |
3161 | fence_reg += reg * 8; |
3162 | ||
3163 | /* To w/a incoherency with non-atomic 64-bit register updates, | |
3164 | * we split the 64-bit update into two 32-bit writes. In order | |
3165 | * for a partial fence not to be evaluated between writes, we | |
3166 | * precede the update with write to turn off the fence register, | |
3167 | * and only enable the fence as the last step. | |
3168 | * | |
3169 | * For extra levels of paranoia, we make sure each step lands | |
3170 | * before applying the next step. | |
3171 | */ | |
3172 | I915_WRITE(fence_reg, 0); | |
3173 | POSTING_READ(fence_reg); | |
3174 | ||
9ce079e4 | 3175 | if (obj) { |
f343c5f6 | 3176 | u32 size = i915_gem_obj_ggtt_size(obj); |
d18b9619 | 3177 | uint64_t val; |
de151cf6 | 3178 | |
f343c5f6 | 3179 | val = (uint64_t)((i915_gem_obj_ggtt_offset(obj) + size - 4096) & |
9ce079e4 | 3180 | 0xfffff000) << 32; |
f343c5f6 | 3181 | val |= i915_gem_obj_ggtt_offset(obj) & 0xfffff000; |
56c844e5 | 3182 | val |= (uint64_t)((obj->stride / 128) - 1) << fence_pitch_shift; |
9ce079e4 CW |
3183 | if (obj->tiling_mode == I915_TILING_Y) |
3184 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; | |
3185 | val |= I965_FENCE_REG_VALID; | |
c6642782 | 3186 | |
d18b9619 CW |
3187 | I915_WRITE(fence_reg + 4, val >> 32); |
3188 | POSTING_READ(fence_reg + 4); | |
3189 | ||
3190 | I915_WRITE(fence_reg + 0, val); | |
3191 | POSTING_READ(fence_reg); | |
3192 | } else { | |
3193 | I915_WRITE(fence_reg + 4, 0); | |
3194 | POSTING_READ(fence_reg + 4); | |
3195 | } | |
de151cf6 JB |
3196 | } |
3197 | ||
9ce079e4 CW |
3198 | static void i915_write_fence_reg(struct drm_device *dev, int reg, |
3199 | struct drm_i915_gem_object *obj) | |
de151cf6 | 3200 | { |
3e31c6c0 | 3201 | struct drm_i915_private *dev_priv = dev->dev_private; |
9ce079e4 | 3202 | u32 val; |
de151cf6 | 3203 | |
9ce079e4 | 3204 | if (obj) { |
f343c5f6 | 3205 | u32 size = i915_gem_obj_ggtt_size(obj); |
9ce079e4 CW |
3206 | int pitch_val; |
3207 | int tile_width; | |
c6642782 | 3208 | |
f343c5f6 | 3209 | WARN((i915_gem_obj_ggtt_offset(obj) & ~I915_FENCE_START_MASK) || |
9ce079e4 | 3210 | (size & -size) != size || |
f343c5f6 BW |
3211 | (i915_gem_obj_ggtt_offset(obj) & (size - 1)), |
3212 | "object 0x%08lx [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n", | |
3213 | i915_gem_obj_ggtt_offset(obj), obj->map_and_fenceable, size); | |
c6642782 | 3214 | |
9ce079e4 CW |
3215 | if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev)) |
3216 | tile_width = 128; | |
3217 | else | |
3218 | tile_width = 512; | |
3219 | ||
3220 | /* Note: pitch better be a power of two tile widths */ | |
3221 | pitch_val = obj->stride / tile_width; | |
3222 | pitch_val = ffs(pitch_val) - 1; | |
3223 | ||
f343c5f6 | 3224 | val = i915_gem_obj_ggtt_offset(obj); |
9ce079e4 CW |
3225 | if (obj->tiling_mode == I915_TILING_Y) |
3226 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
3227 | val |= I915_FENCE_SIZE_BITS(size); | |
3228 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
3229 | val |= I830_FENCE_REG_VALID; | |
3230 | } else | |
3231 | val = 0; | |
3232 | ||
3233 | if (reg < 8) | |
3234 | reg = FENCE_REG_830_0 + reg * 4; | |
3235 | else | |
3236 | reg = FENCE_REG_945_8 + (reg - 8) * 4; | |
3237 | ||
3238 | I915_WRITE(reg, val); | |
3239 | POSTING_READ(reg); | |
de151cf6 JB |
3240 | } |
3241 | ||
9ce079e4 CW |
3242 | static void i830_write_fence_reg(struct drm_device *dev, int reg, |
3243 | struct drm_i915_gem_object *obj) | |
de151cf6 | 3244 | { |
3e31c6c0 | 3245 | struct drm_i915_private *dev_priv = dev->dev_private; |
de151cf6 | 3246 | uint32_t val; |
de151cf6 | 3247 | |
9ce079e4 | 3248 | if (obj) { |
f343c5f6 | 3249 | u32 size = i915_gem_obj_ggtt_size(obj); |
9ce079e4 | 3250 | uint32_t pitch_val; |
de151cf6 | 3251 | |
f343c5f6 | 3252 | WARN((i915_gem_obj_ggtt_offset(obj) & ~I830_FENCE_START_MASK) || |
9ce079e4 | 3253 | (size & -size) != size || |
f343c5f6 BW |
3254 | (i915_gem_obj_ggtt_offset(obj) & (size - 1)), |
3255 | "object 0x%08lx not 512K or pot-size 0x%08x aligned\n", | |
3256 | i915_gem_obj_ggtt_offset(obj), size); | |
e76a16de | 3257 | |
9ce079e4 CW |
3258 | pitch_val = obj->stride / 128; |
3259 | pitch_val = ffs(pitch_val) - 1; | |
de151cf6 | 3260 | |
f343c5f6 | 3261 | val = i915_gem_obj_ggtt_offset(obj); |
9ce079e4 CW |
3262 | if (obj->tiling_mode == I915_TILING_Y) |
3263 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
3264 | val |= I830_FENCE_SIZE_BITS(size); | |
3265 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
3266 | val |= I830_FENCE_REG_VALID; | |
3267 | } else | |
3268 | val = 0; | |
c6642782 | 3269 | |
9ce079e4 CW |
3270 | I915_WRITE(FENCE_REG_830_0 + reg * 4, val); |
3271 | POSTING_READ(FENCE_REG_830_0 + reg * 4); | |
3272 | } | |
3273 | ||
d0a57789 CW |
3274 | inline static bool i915_gem_object_needs_mb(struct drm_i915_gem_object *obj) |
3275 | { | |
3276 | return obj && obj->base.read_domains & I915_GEM_DOMAIN_GTT; | |
3277 | } | |
3278 | ||
9ce079e4 CW |
3279 | static void i915_gem_write_fence(struct drm_device *dev, int reg, |
3280 | struct drm_i915_gem_object *obj) | |
3281 | { | |
d0a57789 CW |
3282 | struct drm_i915_private *dev_priv = dev->dev_private; |
3283 | ||
3284 | /* Ensure that all CPU reads are completed before installing a fence | |
3285 | * and all writes before removing the fence. | |
3286 | */ | |
3287 | if (i915_gem_object_needs_mb(dev_priv->fence_regs[reg].obj)) | |
3288 | mb(); | |
3289 | ||
94a335db DV |
3290 | WARN(obj && (!obj->stride || !obj->tiling_mode), |
3291 | "bogus fence setup with stride: 0x%x, tiling mode: %i\n", | |
3292 | obj->stride, obj->tiling_mode); | |
3293 | ||
9ce079e4 | 3294 | switch (INTEL_INFO(dev)->gen) { |
01209dd5 | 3295 | case 9: |
5ab31333 | 3296 | case 8: |
9ce079e4 | 3297 | case 7: |
56c844e5 | 3298 | case 6: |
9ce079e4 CW |
3299 | case 5: |
3300 | case 4: i965_write_fence_reg(dev, reg, obj); break; | |
3301 | case 3: i915_write_fence_reg(dev, reg, obj); break; | |
3302 | case 2: i830_write_fence_reg(dev, reg, obj); break; | |
7dbf9d6e | 3303 | default: BUG(); |
9ce079e4 | 3304 | } |
d0a57789 CW |
3305 | |
3306 | /* And similarly be paranoid that no direct access to this region | |
3307 | * is reordered to before the fence is installed. | |
3308 | */ | |
3309 | if (i915_gem_object_needs_mb(obj)) | |
3310 | mb(); | |
de151cf6 JB |
3311 | } |
3312 | ||
61050808 CW |
3313 | static inline int fence_number(struct drm_i915_private *dev_priv, |
3314 | struct drm_i915_fence_reg *fence) | |
3315 | { | |
3316 | return fence - dev_priv->fence_regs; | |
3317 | } | |
3318 | ||
3319 | static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, | |
3320 | struct drm_i915_fence_reg *fence, | |
3321 | bool enable) | |
3322 | { | |
2dc8aae0 | 3323 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
46a0b638 CW |
3324 | int reg = fence_number(dev_priv, fence); |
3325 | ||
3326 | i915_gem_write_fence(obj->base.dev, reg, enable ? obj : NULL); | |
61050808 CW |
3327 | |
3328 | if (enable) { | |
46a0b638 | 3329 | obj->fence_reg = reg; |
61050808 CW |
3330 | fence->obj = obj; |
3331 | list_move_tail(&fence->lru_list, &dev_priv->mm.fence_list); | |
3332 | } else { | |
3333 | obj->fence_reg = I915_FENCE_REG_NONE; | |
3334 | fence->obj = NULL; | |
3335 | list_del_init(&fence->lru_list); | |
3336 | } | |
94a335db | 3337 | obj->fence_dirty = false; |
61050808 CW |
3338 | } |
3339 | ||
d9e86c0e | 3340 | static int |
d0a57789 | 3341 | i915_gem_object_wait_fence(struct drm_i915_gem_object *obj) |
d9e86c0e | 3342 | { |
97b2a6a1 JH |
3343 | if (obj->last_fenced_req) { |
3344 | int ret = i915_wait_seqno(obj->ring, | |
3345 | i915_gem_request_get_seqno(obj->last_fenced_req)); | |
18991845 CW |
3346 | if (ret) |
3347 | return ret; | |
d9e86c0e | 3348 | |
97b2a6a1 | 3349 | i915_gem_request_assign(&obj->last_fenced_req, NULL); |
d9e86c0e CW |
3350 | } |
3351 | ||
3352 | return 0; | |
3353 | } | |
3354 | ||
3355 | int | |
3356 | i915_gem_object_put_fence(struct drm_i915_gem_object *obj) | |
3357 | { | |
61050808 | 3358 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
f9c513e9 | 3359 | struct drm_i915_fence_reg *fence; |
d9e86c0e CW |
3360 | int ret; |
3361 | ||
d0a57789 | 3362 | ret = i915_gem_object_wait_fence(obj); |
d9e86c0e CW |
3363 | if (ret) |
3364 | return ret; | |
3365 | ||
61050808 CW |
3366 | if (obj->fence_reg == I915_FENCE_REG_NONE) |
3367 | return 0; | |
d9e86c0e | 3368 | |
f9c513e9 CW |
3369 | fence = &dev_priv->fence_regs[obj->fence_reg]; |
3370 | ||
aff10b30 DV |
3371 | if (WARN_ON(fence->pin_count)) |
3372 | return -EBUSY; | |
3373 | ||
61050808 | 3374 | i915_gem_object_fence_lost(obj); |
f9c513e9 | 3375 | i915_gem_object_update_fence(obj, fence, false); |
d9e86c0e CW |
3376 | |
3377 | return 0; | |
3378 | } | |
3379 | ||
3380 | static struct drm_i915_fence_reg * | |
a360bb1a | 3381 | i915_find_fence_reg(struct drm_device *dev) |
ae3db24a | 3382 | { |
ae3db24a | 3383 | struct drm_i915_private *dev_priv = dev->dev_private; |
8fe301ad | 3384 | struct drm_i915_fence_reg *reg, *avail; |
d9e86c0e | 3385 | int i; |
ae3db24a DV |
3386 | |
3387 | /* First try to find a free reg */ | |
d9e86c0e | 3388 | avail = NULL; |
ae3db24a DV |
3389 | for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { |
3390 | reg = &dev_priv->fence_regs[i]; | |
3391 | if (!reg->obj) | |
d9e86c0e | 3392 | return reg; |
ae3db24a | 3393 | |
1690e1eb | 3394 | if (!reg->pin_count) |
d9e86c0e | 3395 | avail = reg; |
ae3db24a DV |
3396 | } |
3397 | ||
d9e86c0e | 3398 | if (avail == NULL) |
5dce5b93 | 3399 | goto deadlock; |
ae3db24a DV |
3400 | |
3401 | /* None available, try to steal one or wait for a user to finish */ | |
d9e86c0e | 3402 | list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) { |
1690e1eb | 3403 | if (reg->pin_count) |
ae3db24a DV |
3404 | continue; |
3405 | ||
8fe301ad | 3406 | return reg; |
ae3db24a DV |
3407 | } |
3408 | ||
5dce5b93 CW |
3409 | deadlock: |
3410 | /* Wait for completion of pending flips which consume fences */ | |
3411 | if (intel_has_pending_fb_unpin(dev)) | |
3412 | return ERR_PTR(-EAGAIN); | |
3413 | ||
3414 | return ERR_PTR(-EDEADLK); | |
ae3db24a DV |
3415 | } |
3416 | ||
de151cf6 | 3417 | /** |
9a5a53b3 | 3418 | * i915_gem_object_get_fence - set up fencing for an object |
de151cf6 JB |
3419 | * @obj: object to map through a fence reg |
3420 | * | |
3421 | * When mapping objects through the GTT, userspace wants to be able to write | |
3422 | * to them without having to worry about swizzling if the object is tiled. | |
de151cf6 JB |
3423 | * This function walks the fence regs looking for a free one for @obj, |
3424 | * stealing one if it can't find any. | |
3425 | * | |
3426 | * It then sets up the reg based on the object's properties: address, pitch | |
3427 | * and tiling format. | |
9a5a53b3 CW |
3428 | * |
3429 | * For an untiled surface, this removes any existing fence. | |
de151cf6 | 3430 | */ |
8c4b8c3f | 3431 | int |
06d98131 | 3432 | i915_gem_object_get_fence(struct drm_i915_gem_object *obj) |
de151cf6 | 3433 | { |
05394f39 | 3434 | struct drm_device *dev = obj->base.dev; |
79e53945 | 3435 | struct drm_i915_private *dev_priv = dev->dev_private; |
14415745 | 3436 | bool enable = obj->tiling_mode != I915_TILING_NONE; |
d9e86c0e | 3437 | struct drm_i915_fence_reg *reg; |
ae3db24a | 3438 | int ret; |
de151cf6 | 3439 | |
14415745 CW |
3440 | /* Have we updated the tiling parameters upon the object and so |
3441 | * will need to serialise the write to the associated fence register? | |
3442 | */ | |
5d82e3e6 | 3443 | if (obj->fence_dirty) { |
d0a57789 | 3444 | ret = i915_gem_object_wait_fence(obj); |
14415745 CW |
3445 | if (ret) |
3446 | return ret; | |
3447 | } | |
9a5a53b3 | 3448 | |
d9e86c0e | 3449 | /* Just update our place in the LRU if our fence is getting reused. */ |
05394f39 CW |
3450 | if (obj->fence_reg != I915_FENCE_REG_NONE) { |
3451 | reg = &dev_priv->fence_regs[obj->fence_reg]; | |
5d82e3e6 | 3452 | if (!obj->fence_dirty) { |
14415745 CW |
3453 | list_move_tail(®->lru_list, |
3454 | &dev_priv->mm.fence_list); | |
3455 | return 0; | |
3456 | } | |
3457 | } else if (enable) { | |
e6a84468 CW |
3458 | if (WARN_ON(!obj->map_and_fenceable)) |
3459 | return -EINVAL; | |
3460 | ||
14415745 | 3461 | reg = i915_find_fence_reg(dev); |
5dce5b93 CW |
3462 | if (IS_ERR(reg)) |
3463 | return PTR_ERR(reg); | |
d9e86c0e | 3464 | |
14415745 CW |
3465 | if (reg->obj) { |
3466 | struct drm_i915_gem_object *old = reg->obj; | |
3467 | ||
d0a57789 | 3468 | ret = i915_gem_object_wait_fence(old); |
29c5a587 CW |
3469 | if (ret) |
3470 | return ret; | |
3471 | ||
14415745 | 3472 | i915_gem_object_fence_lost(old); |
29c5a587 | 3473 | } |
14415745 | 3474 | } else |
a09ba7fa | 3475 | return 0; |
a09ba7fa | 3476 | |
14415745 | 3477 | i915_gem_object_update_fence(obj, reg, enable); |
14415745 | 3478 | |
9ce079e4 | 3479 | return 0; |
de151cf6 JB |
3480 | } |
3481 | ||
4144f9b5 | 3482 | static bool i915_gem_valid_gtt_space(struct i915_vma *vma, |
42d6ab48 CW |
3483 | unsigned long cache_level) |
3484 | { | |
4144f9b5 | 3485 | struct drm_mm_node *gtt_space = &vma->node; |
42d6ab48 CW |
3486 | struct drm_mm_node *other; |
3487 | ||
4144f9b5 CW |
3488 | /* |
3489 | * On some machines we have to be careful when putting differing types | |
3490 | * of snoopable memory together to avoid the prefetcher crossing memory | |
3491 | * domains and dying. During vm initialisation, we decide whether or not | |
3492 | * these constraints apply and set the drm_mm.color_adjust | |
3493 | * appropriately. | |
42d6ab48 | 3494 | */ |
4144f9b5 | 3495 | if (vma->vm->mm.color_adjust == NULL) |
42d6ab48 CW |
3496 | return true; |
3497 | ||
c6cfb325 | 3498 | if (!drm_mm_node_allocated(gtt_space)) |
42d6ab48 CW |
3499 | return true; |
3500 | ||
3501 | if (list_empty(>t_space->node_list)) | |
3502 | return true; | |
3503 | ||
3504 | other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list); | |
3505 | if (other->allocated && !other->hole_follows && other->color != cache_level) | |
3506 | return false; | |
3507 | ||
3508 | other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list); | |
3509 | if (other->allocated && !gtt_space->hole_follows && other->color != cache_level) | |
3510 | return false; | |
3511 | ||
3512 | return true; | |
3513 | } | |
3514 | ||
673a394b EA |
3515 | /** |
3516 | * Finds free space in the GTT aperture and binds the object there. | |
3517 | */ | |
262de145 | 3518 | static struct i915_vma * |
07fe0b12 BW |
3519 | i915_gem_object_bind_to_vm(struct drm_i915_gem_object *obj, |
3520 | struct i915_address_space *vm, | |
3521 | unsigned alignment, | |
d23db88c | 3522 | uint64_t flags) |
673a394b | 3523 | { |
05394f39 | 3524 | struct drm_device *dev = obj->base.dev; |
3e31c6c0 | 3525 | struct drm_i915_private *dev_priv = dev->dev_private; |
5e783301 | 3526 | u32 size, fence_size, fence_alignment, unfenced_alignment; |
d23db88c CW |
3527 | unsigned long start = |
3528 | flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0; | |
3529 | unsigned long end = | |
1ec9e26d | 3530 | flags & PIN_MAPPABLE ? dev_priv->gtt.mappable_end : vm->total; |
2f633156 | 3531 | struct i915_vma *vma; |
07f73f69 | 3532 | int ret; |
673a394b | 3533 | |
e28f8711 CW |
3534 | fence_size = i915_gem_get_gtt_size(dev, |
3535 | obj->base.size, | |
3536 | obj->tiling_mode); | |
3537 | fence_alignment = i915_gem_get_gtt_alignment(dev, | |
3538 | obj->base.size, | |
d865110c | 3539 | obj->tiling_mode, true); |
e28f8711 | 3540 | unfenced_alignment = |
d865110c | 3541 | i915_gem_get_gtt_alignment(dev, |
1ec9e26d DV |
3542 | obj->base.size, |
3543 | obj->tiling_mode, false); | |
a00b10c3 | 3544 | |
673a394b | 3545 | if (alignment == 0) |
1ec9e26d | 3546 | alignment = flags & PIN_MAPPABLE ? fence_alignment : |
5e783301 | 3547 | unfenced_alignment; |
1ec9e26d | 3548 | if (flags & PIN_MAPPABLE && alignment & (fence_alignment - 1)) { |
bd9b6a4e | 3549 | DRM_DEBUG("Invalid object alignment requested %u\n", alignment); |
262de145 | 3550 | return ERR_PTR(-EINVAL); |
673a394b EA |
3551 | } |
3552 | ||
1ec9e26d | 3553 | size = flags & PIN_MAPPABLE ? fence_size : obj->base.size; |
a00b10c3 | 3554 | |
654fc607 CW |
3555 | /* If the object is bigger than the entire aperture, reject it early |
3556 | * before evicting everything in a vain attempt to find space. | |
3557 | */ | |
d23db88c CW |
3558 | if (obj->base.size > end) { |
3559 | DRM_DEBUG("Attempting to bind an object larger than the aperture: object=%zd > %s aperture=%lu\n", | |
a36689cb | 3560 | obj->base.size, |
1ec9e26d | 3561 | flags & PIN_MAPPABLE ? "mappable" : "total", |
d23db88c | 3562 | end); |
262de145 | 3563 | return ERR_PTR(-E2BIG); |
654fc607 CW |
3564 | } |
3565 | ||
37e680a1 | 3566 | ret = i915_gem_object_get_pages(obj); |
6c085a72 | 3567 | if (ret) |
262de145 | 3568 | return ERR_PTR(ret); |
6c085a72 | 3569 | |
fbdda6fb CW |
3570 | i915_gem_object_pin_pages(obj); |
3571 | ||
accfef2e | 3572 | vma = i915_gem_obj_lookup_or_create_vma(obj, vm); |
262de145 | 3573 | if (IS_ERR(vma)) |
bc6bc15b | 3574 | goto err_unpin; |
2f633156 | 3575 | |
0a9ae0d7 | 3576 | search_free: |
07fe0b12 | 3577 | ret = drm_mm_insert_node_in_range_generic(&vm->mm, &vma->node, |
0a9ae0d7 | 3578 | size, alignment, |
d23db88c CW |
3579 | obj->cache_level, |
3580 | start, end, | |
62347f9e LK |
3581 | DRM_MM_SEARCH_DEFAULT, |
3582 | DRM_MM_CREATE_DEFAULT); | |
dc9dd7a2 | 3583 | if (ret) { |
f6cd1f15 | 3584 | ret = i915_gem_evict_something(dev, vm, size, alignment, |
d23db88c CW |
3585 | obj->cache_level, |
3586 | start, end, | |
3587 | flags); | |
dc9dd7a2 CW |
3588 | if (ret == 0) |
3589 | goto search_free; | |
9731129c | 3590 | |
bc6bc15b | 3591 | goto err_free_vma; |
673a394b | 3592 | } |
4144f9b5 | 3593 | if (WARN_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level))) { |
2f633156 | 3594 | ret = -EINVAL; |
bc6bc15b | 3595 | goto err_remove_node; |
673a394b EA |
3596 | } |
3597 | ||
74163907 | 3598 | ret = i915_gem_gtt_prepare_object(obj); |
2f633156 | 3599 | if (ret) |
bc6bc15b | 3600 | goto err_remove_node; |
673a394b | 3601 | |
35c20a60 | 3602 | list_move_tail(&obj->global_list, &dev_priv->mm.bound_list); |
ca191b13 | 3603 | list_add_tail(&vma->mm_list, &vm->inactive_list); |
bf1a1092 | 3604 | |
1ec9e26d | 3605 | trace_i915_vma_bind(vma, flags); |
8ea99c92 | 3606 | vma->bind_vma(vma, obj->cache_level, |
c826c449 | 3607 | flags & PIN_GLOBAL ? GLOBAL_BIND : 0); |
8ea99c92 | 3608 | |
262de145 | 3609 | return vma; |
2f633156 | 3610 | |
bc6bc15b | 3611 | err_remove_node: |
6286ef9b | 3612 | drm_mm_remove_node(&vma->node); |
bc6bc15b | 3613 | err_free_vma: |
2f633156 | 3614 | i915_gem_vma_destroy(vma); |
262de145 | 3615 | vma = ERR_PTR(ret); |
bc6bc15b | 3616 | err_unpin: |
2f633156 | 3617 | i915_gem_object_unpin_pages(obj); |
262de145 | 3618 | return vma; |
673a394b EA |
3619 | } |
3620 | ||
000433b6 | 3621 | bool |
2c22569b CW |
3622 | i915_gem_clflush_object(struct drm_i915_gem_object *obj, |
3623 | bool force) | |
673a394b | 3624 | { |
673a394b EA |
3625 | /* If we don't have a page list set up, then we're not pinned |
3626 | * to GPU, and we can ignore the cache flush because it'll happen | |
3627 | * again at bind time. | |
3628 | */ | |
05394f39 | 3629 | if (obj->pages == NULL) |
000433b6 | 3630 | return false; |
673a394b | 3631 | |
769ce464 ID |
3632 | /* |
3633 | * Stolen memory is always coherent with the GPU as it is explicitly | |
3634 | * marked as wc by the system, or the system is cache-coherent. | |
3635 | */ | |
6a2c4232 | 3636 | if (obj->stolen || obj->phys_handle) |
000433b6 | 3637 | return false; |
769ce464 | 3638 | |
9c23f7fc CW |
3639 | /* If the GPU is snooping the contents of the CPU cache, |
3640 | * we do not need to manually clear the CPU cache lines. However, | |
3641 | * the caches are only snooped when the render cache is | |
3642 | * flushed/invalidated. As we always have to emit invalidations | |
3643 | * and flushes when moving into and out of the RENDER domain, correct | |
3644 | * snooping behaviour occurs naturally as the result of our domain | |
3645 | * tracking. | |
3646 | */ | |
2c22569b | 3647 | if (!force && cpu_cache_is_coherent(obj->base.dev, obj->cache_level)) |
000433b6 | 3648 | return false; |
9c23f7fc | 3649 | |
1c5d22f7 | 3650 | trace_i915_gem_object_clflush(obj); |
9da3da66 | 3651 | drm_clflush_sg(obj->pages); |
000433b6 CW |
3652 | |
3653 | return true; | |
e47c68e9 EA |
3654 | } |
3655 | ||
3656 | /** Flushes the GTT write domain for the object if it's dirty. */ | |
3657 | static void | |
05394f39 | 3658 | i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj) |
e47c68e9 | 3659 | { |
1c5d22f7 CW |
3660 | uint32_t old_write_domain; |
3661 | ||
05394f39 | 3662 | if (obj->base.write_domain != I915_GEM_DOMAIN_GTT) |
e47c68e9 EA |
3663 | return; |
3664 | ||
63256ec5 | 3665 | /* No actual flushing is required for the GTT write domain. Writes |
e47c68e9 EA |
3666 | * to it immediately go to main memory as far as we know, so there's |
3667 | * no chipset flush. It also doesn't land in render cache. | |
63256ec5 CW |
3668 | * |
3669 | * However, we do have to enforce the order so that all writes through | |
3670 | * the GTT land before any writes to the device, such as updates to | |
3671 | * the GATT itself. | |
e47c68e9 | 3672 | */ |
63256ec5 CW |
3673 | wmb(); |
3674 | ||
05394f39 CW |
3675 | old_write_domain = obj->base.write_domain; |
3676 | obj->base.write_domain = 0; | |
1c5d22f7 | 3677 | |
f99d7069 DV |
3678 | intel_fb_obj_flush(obj, false); |
3679 | ||
1c5d22f7 | 3680 | trace_i915_gem_object_change_domain(obj, |
05394f39 | 3681 | obj->base.read_domains, |
1c5d22f7 | 3682 | old_write_domain); |
e47c68e9 EA |
3683 | } |
3684 | ||
3685 | /** Flushes the CPU write domain for the object if it's dirty. */ | |
3686 | static void | |
2c22569b CW |
3687 | i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj, |
3688 | bool force) | |
e47c68e9 | 3689 | { |
1c5d22f7 | 3690 | uint32_t old_write_domain; |
e47c68e9 | 3691 | |
05394f39 | 3692 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) |
e47c68e9 EA |
3693 | return; |
3694 | ||
000433b6 CW |
3695 | if (i915_gem_clflush_object(obj, force)) |
3696 | i915_gem_chipset_flush(obj->base.dev); | |
3697 | ||
05394f39 CW |
3698 | old_write_domain = obj->base.write_domain; |
3699 | obj->base.write_domain = 0; | |
1c5d22f7 | 3700 | |
f99d7069 DV |
3701 | intel_fb_obj_flush(obj, false); |
3702 | ||
1c5d22f7 | 3703 | trace_i915_gem_object_change_domain(obj, |
05394f39 | 3704 | obj->base.read_domains, |
1c5d22f7 | 3705 | old_write_domain); |
e47c68e9 EA |
3706 | } |
3707 | ||
2ef7eeaa EA |
3708 | /** |
3709 | * Moves a single object to the GTT read, and possibly write domain. | |
3710 | * | |
3711 | * This function returns when the move is complete, including waiting on | |
3712 | * flushes to occur. | |
3713 | */ | |
79e53945 | 3714 | int |
2021746e | 3715 | i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write) |
2ef7eeaa | 3716 | { |
3e31c6c0 | 3717 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
dc8cd1e7 | 3718 | struct i915_vma *vma = i915_gem_obj_to_ggtt(obj); |
1c5d22f7 | 3719 | uint32_t old_write_domain, old_read_domains; |
e47c68e9 | 3720 | int ret; |
2ef7eeaa | 3721 | |
02354392 | 3722 | /* Not valid to be called on unbound objects. */ |
dc8cd1e7 | 3723 | if (vma == NULL) |
02354392 EA |
3724 | return -EINVAL; |
3725 | ||
8d7e3de1 CW |
3726 | if (obj->base.write_domain == I915_GEM_DOMAIN_GTT) |
3727 | return 0; | |
3728 | ||
0201f1ec | 3729 | ret = i915_gem_object_wait_rendering(obj, !write); |
88241785 CW |
3730 | if (ret) |
3731 | return ret; | |
3732 | ||
c8725f3d | 3733 | i915_gem_object_retire(obj); |
2c22569b | 3734 | i915_gem_object_flush_cpu_write_domain(obj, false); |
1c5d22f7 | 3735 | |
d0a57789 CW |
3736 | /* Serialise direct access to this object with the barriers for |
3737 | * coherent writes from the GPU, by effectively invalidating the | |
3738 | * GTT domain upon first access. | |
3739 | */ | |
3740 | if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) | |
3741 | mb(); | |
3742 | ||
05394f39 CW |
3743 | old_write_domain = obj->base.write_domain; |
3744 | old_read_domains = obj->base.read_domains; | |
1c5d22f7 | 3745 | |
e47c68e9 EA |
3746 | /* It should now be out of any other write domains, and we can update |
3747 | * the domain values for our changes. | |
3748 | */ | |
05394f39 CW |
3749 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0); |
3750 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; | |
e47c68e9 | 3751 | if (write) { |
05394f39 CW |
3752 | obj->base.read_domains = I915_GEM_DOMAIN_GTT; |
3753 | obj->base.write_domain = I915_GEM_DOMAIN_GTT; | |
3754 | obj->dirty = 1; | |
2ef7eeaa EA |
3755 | } |
3756 | ||
f99d7069 DV |
3757 | if (write) |
3758 | intel_fb_obj_invalidate(obj, NULL); | |
3759 | ||
1c5d22f7 CW |
3760 | trace_i915_gem_object_change_domain(obj, |
3761 | old_read_domains, | |
3762 | old_write_domain); | |
3763 | ||
8325a09d | 3764 | /* And bump the LRU for this access */ |
dc8cd1e7 CW |
3765 | if (i915_gem_object_is_inactive(obj)) |
3766 | list_move_tail(&vma->mm_list, | |
3767 | &dev_priv->gtt.base.inactive_list); | |
8325a09d | 3768 | |
e47c68e9 EA |
3769 | return 0; |
3770 | } | |
3771 | ||
e4ffd173 CW |
3772 | int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj, |
3773 | enum i915_cache_level cache_level) | |
3774 | { | |
7bddb01f | 3775 | struct drm_device *dev = obj->base.dev; |
df6f783a | 3776 | struct i915_vma *vma, *next; |
e4ffd173 CW |
3777 | int ret; |
3778 | ||
3779 | if (obj->cache_level == cache_level) | |
3780 | return 0; | |
3781 | ||
d7f46fc4 | 3782 | if (i915_gem_obj_is_pinned(obj)) { |
e4ffd173 CW |
3783 | DRM_DEBUG("can not change the cache level of pinned objects\n"); |
3784 | return -EBUSY; | |
3785 | } | |
3786 | ||
df6f783a | 3787 | list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) { |
4144f9b5 | 3788 | if (!i915_gem_valid_gtt_space(vma, cache_level)) { |
07fe0b12 | 3789 | ret = i915_vma_unbind(vma); |
3089c6f2 BW |
3790 | if (ret) |
3791 | return ret; | |
3089c6f2 | 3792 | } |
42d6ab48 CW |
3793 | } |
3794 | ||
3089c6f2 | 3795 | if (i915_gem_obj_bound_any(obj)) { |
e4ffd173 CW |
3796 | ret = i915_gem_object_finish_gpu(obj); |
3797 | if (ret) | |
3798 | return ret; | |
3799 | ||
3800 | i915_gem_object_finish_gtt(obj); | |
3801 | ||
3802 | /* Before SandyBridge, you could not use tiling or fence | |
3803 | * registers with snooped memory, so relinquish any fences | |
3804 | * currently pointing to our region in the aperture. | |
3805 | */ | |
42d6ab48 | 3806 | if (INTEL_INFO(dev)->gen < 6) { |
e4ffd173 CW |
3807 | ret = i915_gem_object_put_fence(obj); |
3808 | if (ret) | |
3809 | return ret; | |
3810 | } | |
3811 | ||
6f65e29a | 3812 | list_for_each_entry(vma, &obj->vma_list, vma_link) |
8ea99c92 DV |
3813 | if (drm_mm_node_allocated(&vma->node)) |
3814 | vma->bind_vma(vma, cache_level, | |
aff43766 | 3815 | vma->bound & GLOBAL_BIND); |
e4ffd173 CW |
3816 | } |
3817 | ||
2c22569b CW |
3818 | list_for_each_entry(vma, &obj->vma_list, vma_link) |
3819 | vma->node.color = cache_level; | |
3820 | obj->cache_level = cache_level; | |
3821 | ||
3822 | if (cpu_write_needs_clflush(obj)) { | |
e4ffd173 CW |
3823 | u32 old_read_domains, old_write_domain; |
3824 | ||
3825 | /* If we're coming from LLC cached, then we haven't | |
3826 | * actually been tracking whether the data is in the | |
3827 | * CPU cache or not, since we only allow one bit set | |
3828 | * in obj->write_domain and have been skipping the clflushes. | |
3829 | * Just set it to the CPU cache for now. | |
3830 | */ | |
c8725f3d | 3831 | i915_gem_object_retire(obj); |
e4ffd173 | 3832 | WARN_ON(obj->base.write_domain & ~I915_GEM_DOMAIN_CPU); |
e4ffd173 CW |
3833 | |
3834 | old_read_domains = obj->base.read_domains; | |
3835 | old_write_domain = obj->base.write_domain; | |
3836 | ||
3837 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; | |
3838 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
3839 | ||
3840 | trace_i915_gem_object_change_domain(obj, | |
3841 | old_read_domains, | |
3842 | old_write_domain); | |
3843 | } | |
3844 | ||
e4ffd173 CW |
3845 | return 0; |
3846 | } | |
3847 | ||
199adf40 BW |
3848 | int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data, |
3849 | struct drm_file *file) | |
e6994aee | 3850 | { |
199adf40 | 3851 | struct drm_i915_gem_caching *args = data; |
e6994aee CW |
3852 | struct drm_i915_gem_object *obj; |
3853 | int ret; | |
3854 | ||
3855 | ret = i915_mutex_lock_interruptible(dev); | |
3856 | if (ret) | |
3857 | return ret; | |
3858 | ||
3859 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); | |
3860 | if (&obj->base == NULL) { | |
3861 | ret = -ENOENT; | |
3862 | goto unlock; | |
3863 | } | |
3864 | ||
651d794f CW |
3865 | switch (obj->cache_level) { |
3866 | case I915_CACHE_LLC: | |
3867 | case I915_CACHE_L3_LLC: | |
3868 | args->caching = I915_CACHING_CACHED; | |
3869 | break; | |
3870 | ||
4257d3ba CW |
3871 | case I915_CACHE_WT: |
3872 | args->caching = I915_CACHING_DISPLAY; | |
3873 | break; | |
3874 | ||
651d794f CW |
3875 | default: |
3876 | args->caching = I915_CACHING_NONE; | |
3877 | break; | |
3878 | } | |
e6994aee CW |
3879 | |
3880 | drm_gem_object_unreference(&obj->base); | |
3881 | unlock: | |
3882 | mutex_unlock(&dev->struct_mutex); | |
3883 | return ret; | |
3884 | } | |
3885 | ||
199adf40 BW |
3886 | int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data, |
3887 | struct drm_file *file) | |
e6994aee | 3888 | { |
199adf40 | 3889 | struct drm_i915_gem_caching *args = data; |
e6994aee CW |
3890 | struct drm_i915_gem_object *obj; |
3891 | enum i915_cache_level level; | |
3892 | int ret; | |
3893 | ||
199adf40 BW |
3894 | switch (args->caching) { |
3895 | case I915_CACHING_NONE: | |
e6994aee CW |
3896 | level = I915_CACHE_NONE; |
3897 | break; | |
199adf40 | 3898 | case I915_CACHING_CACHED: |
e6994aee CW |
3899 | level = I915_CACHE_LLC; |
3900 | break; | |
4257d3ba CW |
3901 | case I915_CACHING_DISPLAY: |
3902 | level = HAS_WT(dev) ? I915_CACHE_WT : I915_CACHE_NONE; | |
3903 | break; | |
e6994aee CW |
3904 | default: |
3905 | return -EINVAL; | |
3906 | } | |
3907 | ||
3bc2913e BW |
3908 | ret = i915_mutex_lock_interruptible(dev); |
3909 | if (ret) | |
3910 | return ret; | |
3911 | ||
e6994aee CW |
3912 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
3913 | if (&obj->base == NULL) { | |
3914 | ret = -ENOENT; | |
3915 | goto unlock; | |
3916 | } | |
3917 | ||
3918 | ret = i915_gem_object_set_cache_level(obj, level); | |
3919 | ||
3920 | drm_gem_object_unreference(&obj->base); | |
3921 | unlock: | |
3922 | mutex_unlock(&dev->struct_mutex); | |
3923 | return ret; | |
3924 | } | |
3925 | ||
cc98b413 CW |
3926 | static bool is_pin_display(struct drm_i915_gem_object *obj) |
3927 | { | |
19656430 OM |
3928 | struct i915_vma *vma; |
3929 | ||
19656430 OM |
3930 | vma = i915_gem_obj_to_ggtt(obj); |
3931 | if (!vma) | |
3932 | return false; | |
3933 | ||
4feb7659 | 3934 | /* There are 2 sources that pin objects: |
cc98b413 CW |
3935 | * 1. The display engine (scanouts, sprites, cursors); |
3936 | * 2. Reservations for execbuffer; | |
cc98b413 CW |
3937 | * |
3938 | * We can ignore reservations as we hold the struct_mutex and | |
4feb7659 | 3939 | * are only called outside of the reservation path. |
cc98b413 | 3940 | */ |
4feb7659 | 3941 | return vma->pin_count; |
cc98b413 CW |
3942 | } |
3943 | ||
b9241ea3 | 3944 | /* |
2da3b9b9 CW |
3945 | * Prepare buffer for display plane (scanout, cursors, etc). |
3946 | * Can be called from an uninterruptible phase (modesetting) and allows | |
3947 | * any flushes to be pipelined (for pageflips). | |
b9241ea3 ZW |
3948 | */ |
3949 | int | |
2da3b9b9 CW |
3950 | i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, |
3951 | u32 alignment, | |
a4872ba6 | 3952 | struct intel_engine_cs *pipelined) |
b9241ea3 | 3953 | { |
2da3b9b9 | 3954 | u32 old_read_domains, old_write_domain; |
19656430 | 3955 | bool was_pin_display; |
b9241ea3 ZW |
3956 | int ret; |
3957 | ||
0be73284 | 3958 | if (pipelined != obj->ring) { |
2911a35b BW |
3959 | ret = i915_gem_object_sync(obj, pipelined); |
3960 | if (ret) | |
b9241ea3 ZW |
3961 | return ret; |
3962 | } | |
3963 | ||
cc98b413 CW |
3964 | /* Mark the pin_display early so that we account for the |
3965 | * display coherency whilst setting up the cache domains. | |
3966 | */ | |
19656430 | 3967 | was_pin_display = obj->pin_display; |
cc98b413 CW |
3968 | obj->pin_display = true; |
3969 | ||
a7ef0640 EA |
3970 | /* The display engine is not coherent with the LLC cache on gen6. As |
3971 | * a result, we make sure that the pinning that is about to occur is | |
3972 | * done with uncached PTEs. This is lowest common denominator for all | |
3973 | * chipsets. | |
3974 | * | |
3975 | * However for gen6+, we could do better by using the GFDT bit instead | |
3976 | * of uncaching, which would allow us to flush all the LLC-cached data | |
3977 | * with that bit in the PTE to main memory with just one PIPE_CONTROL. | |
3978 | */ | |
651d794f CW |
3979 | ret = i915_gem_object_set_cache_level(obj, |
3980 | HAS_WT(obj->base.dev) ? I915_CACHE_WT : I915_CACHE_NONE); | |
a7ef0640 | 3981 | if (ret) |
cc98b413 | 3982 | goto err_unpin_display; |
a7ef0640 | 3983 | |
2da3b9b9 CW |
3984 | /* As the user may map the buffer once pinned in the display plane |
3985 | * (e.g. libkms for the bootup splash), we have to ensure that we | |
3986 | * always use map_and_fenceable for all scanout buffers. | |
3987 | */ | |
1ec9e26d | 3988 | ret = i915_gem_obj_ggtt_pin(obj, alignment, PIN_MAPPABLE); |
2da3b9b9 | 3989 | if (ret) |
cc98b413 | 3990 | goto err_unpin_display; |
2da3b9b9 | 3991 | |
2c22569b | 3992 | i915_gem_object_flush_cpu_write_domain(obj, true); |
b118c1e3 | 3993 | |
2da3b9b9 | 3994 | old_write_domain = obj->base.write_domain; |
05394f39 | 3995 | old_read_domains = obj->base.read_domains; |
2da3b9b9 CW |
3996 | |
3997 | /* It should now be out of any other write domains, and we can update | |
3998 | * the domain values for our changes. | |
3999 | */ | |
e5f1d962 | 4000 | obj->base.write_domain = 0; |
05394f39 | 4001 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; |
b9241ea3 ZW |
4002 | |
4003 | trace_i915_gem_object_change_domain(obj, | |
4004 | old_read_domains, | |
2da3b9b9 | 4005 | old_write_domain); |
b9241ea3 ZW |
4006 | |
4007 | return 0; | |
cc98b413 CW |
4008 | |
4009 | err_unpin_display: | |
19656430 OM |
4010 | WARN_ON(was_pin_display != is_pin_display(obj)); |
4011 | obj->pin_display = was_pin_display; | |
cc98b413 CW |
4012 | return ret; |
4013 | } | |
4014 | ||
4015 | void | |
4016 | i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object *obj) | |
4017 | { | |
d7f46fc4 | 4018 | i915_gem_object_ggtt_unpin(obj); |
cc98b413 | 4019 | obj->pin_display = is_pin_display(obj); |
b9241ea3 ZW |
4020 | } |
4021 | ||
85345517 | 4022 | int |
a8198eea | 4023 | i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj) |
85345517 | 4024 | { |
88241785 CW |
4025 | int ret; |
4026 | ||
a8198eea | 4027 | if ((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0) |
85345517 CW |
4028 | return 0; |
4029 | ||
0201f1ec | 4030 | ret = i915_gem_object_wait_rendering(obj, false); |
c501ae7f CW |
4031 | if (ret) |
4032 | return ret; | |
4033 | ||
a8198eea CW |
4034 | /* Ensure that we invalidate the GPU's caches and TLBs. */ |
4035 | obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS; | |
c501ae7f | 4036 | return 0; |
85345517 CW |
4037 | } |
4038 | ||
e47c68e9 EA |
4039 | /** |
4040 | * Moves a single object to the CPU read, and possibly write domain. | |
4041 | * | |
4042 | * This function returns when the move is complete, including waiting on | |
4043 | * flushes to occur. | |
4044 | */ | |
dabdfe02 | 4045 | int |
919926ae | 4046 | i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write) |
e47c68e9 | 4047 | { |
1c5d22f7 | 4048 | uint32_t old_write_domain, old_read_domains; |
e47c68e9 EA |
4049 | int ret; |
4050 | ||
8d7e3de1 CW |
4051 | if (obj->base.write_domain == I915_GEM_DOMAIN_CPU) |
4052 | return 0; | |
4053 | ||
0201f1ec | 4054 | ret = i915_gem_object_wait_rendering(obj, !write); |
88241785 CW |
4055 | if (ret) |
4056 | return ret; | |
4057 | ||
c8725f3d | 4058 | i915_gem_object_retire(obj); |
e47c68e9 | 4059 | i915_gem_object_flush_gtt_write_domain(obj); |
2ef7eeaa | 4060 | |
05394f39 CW |
4061 | old_write_domain = obj->base.write_domain; |
4062 | old_read_domains = obj->base.read_domains; | |
1c5d22f7 | 4063 | |
e47c68e9 | 4064 | /* Flush the CPU cache if it's still invalid. */ |
05394f39 | 4065 | if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) { |
2c22569b | 4066 | i915_gem_clflush_object(obj, false); |
2ef7eeaa | 4067 | |
05394f39 | 4068 | obj->base.read_domains |= I915_GEM_DOMAIN_CPU; |
2ef7eeaa EA |
4069 | } |
4070 | ||
4071 | /* It should now be out of any other write domains, and we can update | |
4072 | * the domain values for our changes. | |
4073 | */ | |
05394f39 | 4074 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) != 0); |
e47c68e9 EA |
4075 | |
4076 | /* If we're writing through the CPU, then the GPU read domains will | |
4077 | * need to be invalidated at next use. | |
4078 | */ | |
4079 | if (write) { | |
05394f39 CW |
4080 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; |
4081 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
e47c68e9 | 4082 | } |
2ef7eeaa | 4083 | |
f99d7069 DV |
4084 | if (write) |
4085 | intel_fb_obj_invalidate(obj, NULL); | |
4086 | ||
1c5d22f7 CW |
4087 | trace_i915_gem_object_change_domain(obj, |
4088 | old_read_domains, | |
4089 | old_write_domain); | |
4090 | ||
2ef7eeaa EA |
4091 | return 0; |
4092 | } | |
4093 | ||
673a394b EA |
4094 | /* Throttle our rendering by waiting until the ring has completed our requests |
4095 | * emitted over 20 msec ago. | |
4096 | * | |
b962442e EA |
4097 | * Note that if we were to use the current jiffies each time around the loop, |
4098 | * we wouldn't escape the function with any frames outstanding if the time to | |
4099 | * render a frame was over 20ms. | |
4100 | * | |
673a394b EA |
4101 | * This should get us reasonable parallelism between CPU and GPU but also |
4102 | * relatively low latency when blocking on a particular request to finish. | |
4103 | */ | |
40a5f0de | 4104 | static int |
f787a5f5 | 4105 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file) |
40a5f0de | 4106 | { |
f787a5f5 CW |
4107 | struct drm_i915_private *dev_priv = dev->dev_private; |
4108 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
b962442e | 4109 | unsigned long recent_enough = jiffies - msecs_to_jiffies(20); |
54fb2411 | 4110 | struct drm_i915_gem_request *request, *target = NULL; |
f69061be | 4111 | unsigned reset_counter; |
f787a5f5 | 4112 | int ret; |
93533c29 | 4113 | |
308887aa DV |
4114 | ret = i915_gem_wait_for_error(&dev_priv->gpu_error); |
4115 | if (ret) | |
4116 | return ret; | |
4117 | ||
4118 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, false); | |
4119 | if (ret) | |
4120 | return ret; | |
e110e8d6 | 4121 | |
1c25595f | 4122 | spin_lock(&file_priv->mm.lock); |
f787a5f5 | 4123 | list_for_each_entry(request, &file_priv->mm.request_list, client_list) { |
b962442e EA |
4124 | if (time_after_eq(request->emitted_jiffies, recent_enough)) |
4125 | break; | |
40a5f0de | 4126 | |
54fb2411 | 4127 | target = request; |
b962442e | 4128 | } |
f69061be | 4129 | reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); |
ff865885 JH |
4130 | if (target) |
4131 | i915_gem_request_reference(target); | |
1c25595f | 4132 | spin_unlock(&file_priv->mm.lock); |
40a5f0de | 4133 | |
54fb2411 | 4134 | if (target == NULL) |
f787a5f5 | 4135 | return 0; |
2bc43b5c | 4136 | |
54fb2411 JH |
4137 | ret = __i915_wait_seqno(i915_gem_request_get_ring(target), |
4138 | i915_gem_request_get_seqno(target), | |
4139 | reset_counter, true, NULL, NULL); | |
f787a5f5 CW |
4140 | if (ret == 0) |
4141 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, 0); | |
40a5f0de | 4142 | |
ff865885 JH |
4143 | mutex_lock(&dev->struct_mutex); |
4144 | i915_gem_request_unreference(target); | |
4145 | mutex_unlock(&dev->struct_mutex); | |
4146 | ||
40a5f0de EA |
4147 | return ret; |
4148 | } | |
4149 | ||
d23db88c CW |
4150 | static bool |
4151 | i915_vma_misplaced(struct i915_vma *vma, uint32_t alignment, uint64_t flags) | |
4152 | { | |
4153 | struct drm_i915_gem_object *obj = vma->obj; | |
4154 | ||
4155 | if (alignment && | |
4156 | vma->node.start & (alignment - 1)) | |
4157 | return true; | |
4158 | ||
4159 | if (flags & PIN_MAPPABLE && !obj->map_and_fenceable) | |
4160 | return true; | |
4161 | ||
4162 | if (flags & PIN_OFFSET_BIAS && | |
4163 | vma->node.start < (flags & PIN_OFFSET_MASK)) | |
4164 | return true; | |
4165 | ||
4166 | return false; | |
4167 | } | |
4168 | ||
673a394b | 4169 | int |
05394f39 | 4170 | i915_gem_object_pin(struct drm_i915_gem_object *obj, |
c37e2204 | 4171 | struct i915_address_space *vm, |
05394f39 | 4172 | uint32_t alignment, |
d23db88c | 4173 | uint64_t flags) |
673a394b | 4174 | { |
6e7186af | 4175 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
07fe0b12 | 4176 | struct i915_vma *vma; |
ef79e17c | 4177 | unsigned bound; |
673a394b EA |
4178 | int ret; |
4179 | ||
6e7186af BW |
4180 | if (WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base)) |
4181 | return -ENODEV; | |
4182 | ||
bf3d149b | 4183 | if (WARN_ON(flags & (PIN_GLOBAL | PIN_MAPPABLE) && !i915_is_ggtt(vm))) |
1ec9e26d | 4184 | return -EINVAL; |
07fe0b12 | 4185 | |
c826c449 CW |
4186 | if (WARN_ON((flags & (PIN_MAPPABLE | PIN_GLOBAL)) == PIN_MAPPABLE)) |
4187 | return -EINVAL; | |
4188 | ||
07fe0b12 | 4189 | vma = i915_gem_obj_to_vma(obj, vm); |
07fe0b12 | 4190 | if (vma) { |
d7f46fc4 BW |
4191 | if (WARN_ON(vma->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT)) |
4192 | return -EBUSY; | |
4193 | ||
d23db88c | 4194 | if (i915_vma_misplaced(vma, alignment, flags)) { |
d7f46fc4 | 4195 | WARN(vma->pin_count, |
ae7d49d8 | 4196 | "bo is already pinned with incorrect alignment:" |
f343c5f6 | 4197 | " offset=%lx, req.alignment=%x, req.map_and_fenceable=%d," |
75e9e915 | 4198 | " obj->map_and_fenceable=%d\n", |
07fe0b12 | 4199 | i915_gem_obj_offset(obj, vm), alignment, |
d23db88c | 4200 | !!(flags & PIN_MAPPABLE), |
05394f39 | 4201 | obj->map_and_fenceable); |
07fe0b12 | 4202 | ret = i915_vma_unbind(vma); |
ac0c6b5a CW |
4203 | if (ret) |
4204 | return ret; | |
8ea99c92 DV |
4205 | |
4206 | vma = NULL; | |
ac0c6b5a CW |
4207 | } |
4208 | } | |
4209 | ||
ef79e17c | 4210 | bound = vma ? vma->bound : 0; |
8ea99c92 | 4211 | if (vma == NULL || !drm_mm_node_allocated(&vma->node)) { |
262de145 DV |
4212 | vma = i915_gem_object_bind_to_vm(obj, vm, alignment, flags); |
4213 | if (IS_ERR(vma)) | |
4214 | return PTR_ERR(vma); | |
22c344e9 | 4215 | } |
76446cac | 4216 | |
aff43766 | 4217 | if (flags & PIN_GLOBAL && !(vma->bound & GLOBAL_BIND)) |
8ea99c92 | 4218 | vma->bind_vma(vma, obj->cache_level, GLOBAL_BIND); |
74898d7e | 4219 | |
ef79e17c CW |
4220 | if ((bound ^ vma->bound) & GLOBAL_BIND) { |
4221 | bool mappable, fenceable; | |
4222 | u32 fence_size, fence_alignment; | |
4223 | ||
4224 | fence_size = i915_gem_get_gtt_size(obj->base.dev, | |
4225 | obj->base.size, | |
4226 | obj->tiling_mode); | |
4227 | fence_alignment = i915_gem_get_gtt_alignment(obj->base.dev, | |
4228 | obj->base.size, | |
4229 | obj->tiling_mode, | |
4230 | true); | |
4231 | ||
4232 | fenceable = (vma->node.size == fence_size && | |
4233 | (vma->node.start & (fence_alignment - 1)) == 0); | |
4234 | ||
4235 | mappable = (vma->node.start + obj->base.size <= | |
4236 | dev_priv->gtt.mappable_end); | |
4237 | ||
4238 | obj->map_and_fenceable = mappable && fenceable; | |
4239 | } | |
4240 | ||
4241 | WARN_ON(flags & PIN_MAPPABLE && !obj->map_and_fenceable); | |
4242 | ||
8ea99c92 | 4243 | vma->pin_count++; |
1ec9e26d DV |
4244 | if (flags & PIN_MAPPABLE) |
4245 | obj->pin_mappable |= true; | |
673a394b EA |
4246 | |
4247 | return 0; | |
4248 | } | |
4249 | ||
4250 | void | |
d7f46fc4 | 4251 | i915_gem_object_ggtt_unpin(struct drm_i915_gem_object *obj) |
673a394b | 4252 | { |
d7f46fc4 | 4253 | struct i915_vma *vma = i915_gem_obj_to_ggtt(obj); |
673a394b | 4254 | |
d7f46fc4 BW |
4255 | BUG_ON(!vma); |
4256 | BUG_ON(vma->pin_count == 0); | |
4257 | BUG_ON(!i915_gem_obj_ggtt_bound(obj)); | |
4258 | ||
4259 | if (--vma->pin_count == 0) | |
6299f992 | 4260 | obj->pin_mappable = false; |
673a394b EA |
4261 | } |
4262 | ||
d8ffa60b DV |
4263 | bool |
4264 | i915_gem_object_pin_fence(struct drm_i915_gem_object *obj) | |
4265 | { | |
4266 | if (obj->fence_reg != I915_FENCE_REG_NONE) { | |
4267 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
4268 | struct i915_vma *ggtt_vma = i915_gem_obj_to_ggtt(obj); | |
4269 | ||
4270 | WARN_ON(!ggtt_vma || | |
4271 | dev_priv->fence_regs[obj->fence_reg].pin_count > | |
4272 | ggtt_vma->pin_count); | |
4273 | dev_priv->fence_regs[obj->fence_reg].pin_count++; | |
4274 | return true; | |
4275 | } else | |
4276 | return false; | |
4277 | } | |
4278 | ||
4279 | void | |
4280 | i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj) | |
4281 | { | |
4282 | if (obj->fence_reg != I915_FENCE_REG_NONE) { | |
4283 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
4284 | WARN_ON(dev_priv->fence_regs[obj->fence_reg].pin_count <= 0); | |
4285 | dev_priv->fence_regs[obj->fence_reg].pin_count--; | |
4286 | } | |
4287 | } | |
4288 | ||
673a394b EA |
4289 | int |
4290 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 4291 | struct drm_file *file) |
673a394b EA |
4292 | { |
4293 | struct drm_i915_gem_busy *args = data; | |
05394f39 | 4294 | struct drm_i915_gem_object *obj; |
30dbf0c0 CW |
4295 | int ret; |
4296 | ||
76c1dec1 | 4297 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 4298 | if (ret) |
76c1dec1 | 4299 | return ret; |
673a394b | 4300 | |
05394f39 | 4301 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 4302 | if (&obj->base == NULL) { |
1d7cfea1 CW |
4303 | ret = -ENOENT; |
4304 | goto unlock; | |
673a394b | 4305 | } |
d1b851fc | 4306 | |
0be555b6 CW |
4307 | /* Count all active objects as busy, even if they are currently not used |
4308 | * by the gpu. Users of this interface expect objects to eventually | |
4309 | * become non-busy without any further actions, therefore emit any | |
4310 | * necessary flushes here. | |
c4de0a5d | 4311 | */ |
30dfebf3 | 4312 | ret = i915_gem_object_flush_active(obj); |
0be555b6 | 4313 | |
30dfebf3 | 4314 | args->busy = obj->active; |
e9808edd CW |
4315 | if (obj->ring) { |
4316 | BUILD_BUG_ON(I915_NUM_RINGS > 16); | |
4317 | args->busy |= intel_ring_flag(obj->ring) << 16; | |
4318 | } | |
673a394b | 4319 | |
05394f39 | 4320 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 4321 | unlock: |
673a394b | 4322 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 4323 | return ret; |
673a394b EA |
4324 | } |
4325 | ||
4326 | int | |
4327 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, | |
4328 | struct drm_file *file_priv) | |
4329 | { | |
0206e353 | 4330 | return i915_gem_ring_throttle(dev, file_priv); |
673a394b EA |
4331 | } |
4332 | ||
3ef94daa CW |
4333 | int |
4334 | i915_gem_madvise_ioctl(struct drm_device *dev, void *data, | |
4335 | struct drm_file *file_priv) | |
4336 | { | |
656bfa3a | 4337 | struct drm_i915_private *dev_priv = dev->dev_private; |
3ef94daa | 4338 | struct drm_i915_gem_madvise *args = data; |
05394f39 | 4339 | struct drm_i915_gem_object *obj; |
76c1dec1 | 4340 | int ret; |
3ef94daa CW |
4341 | |
4342 | switch (args->madv) { | |
4343 | case I915_MADV_DONTNEED: | |
4344 | case I915_MADV_WILLNEED: | |
4345 | break; | |
4346 | default: | |
4347 | return -EINVAL; | |
4348 | } | |
4349 | ||
1d7cfea1 CW |
4350 | ret = i915_mutex_lock_interruptible(dev); |
4351 | if (ret) | |
4352 | return ret; | |
4353 | ||
05394f39 | 4354 | obj = to_intel_bo(drm_gem_object_lookup(dev, file_priv, args->handle)); |
c8725226 | 4355 | if (&obj->base == NULL) { |
1d7cfea1 CW |
4356 | ret = -ENOENT; |
4357 | goto unlock; | |
3ef94daa | 4358 | } |
3ef94daa | 4359 | |
d7f46fc4 | 4360 | if (i915_gem_obj_is_pinned(obj)) { |
1d7cfea1 CW |
4361 | ret = -EINVAL; |
4362 | goto out; | |
3ef94daa CW |
4363 | } |
4364 | ||
656bfa3a DV |
4365 | if (obj->pages && |
4366 | obj->tiling_mode != I915_TILING_NONE && | |
4367 | dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) { | |
4368 | if (obj->madv == I915_MADV_WILLNEED) | |
4369 | i915_gem_object_unpin_pages(obj); | |
4370 | if (args->madv == I915_MADV_WILLNEED) | |
4371 | i915_gem_object_pin_pages(obj); | |
4372 | } | |
4373 | ||
05394f39 CW |
4374 | if (obj->madv != __I915_MADV_PURGED) |
4375 | obj->madv = args->madv; | |
3ef94daa | 4376 | |
6c085a72 CW |
4377 | /* if the object is no longer attached, discard its backing storage */ |
4378 | if (i915_gem_object_is_purgeable(obj) && obj->pages == NULL) | |
2d7ef395 CW |
4379 | i915_gem_object_truncate(obj); |
4380 | ||
05394f39 | 4381 | args->retained = obj->madv != __I915_MADV_PURGED; |
bb6baf76 | 4382 | |
1d7cfea1 | 4383 | out: |
05394f39 | 4384 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 4385 | unlock: |
3ef94daa | 4386 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 4387 | return ret; |
3ef94daa CW |
4388 | } |
4389 | ||
37e680a1 CW |
4390 | void i915_gem_object_init(struct drm_i915_gem_object *obj, |
4391 | const struct drm_i915_gem_object_ops *ops) | |
0327d6ba | 4392 | { |
35c20a60 | 4393 | INIT_LIST_HEAD(&obj->global_list); |
0327d6ba | 4394 | INIT_LIST_HEAD(&obj->ring_list); |
b25cb2f8 | 4395 | INIT_LIST_HEAD(&obj->obj_exec_link); |
2f633156 | 4396 | INIT_LIST_HEAD(&obj->vma_list); |
0327d6ba | 4397 | |
37e680a1 CW |
4398 | obj->ops = ops; |
4399 | ||
0327d6ba CW |
4400 | obj->fence_reg = I915_FENCE_REG_NONE; |
4401 | obj->madv = I915_MADV_WILLNEED; | |
0327d6ba CW |
4402 | |
4403 | i915_gem_info_add_obj(obj->base.dev->dev_private, obj->base.size); | |
4404 | } | |
4405 | ||
37e680a1 CW |
4406 | static const struct drm_i915_gem_object_ops i915_gem_object_ops = { |
4407 | .get_pages = i915_gem_object_get_pages_gtt, | |
4408 | .put_pages = i915_gem_object_put_pages_gtt, | |
4409 | }; | |
4410 | ||
05394f39 CW |
4411 | struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev, |
4412 | size_t size) | |
ac52bc56 | 4413 | { |
c397b908 | 4414 | struct drm_i915_gem_object *obj; |
5949eac4 | 4415 | struct address_space *mapping; |
1a240d4d | 4416 | gfp_t mask; |
ac52bc56 | 4417 | |
42dcedd4 | 4418 | obj = i915_gem_object_alloc(dev); |
c397b908 DV |
4419 | if (obj == NULL) |
4420 | return NULL; | |
673a394b | 4421 | |
c397b908 | 4422 | if (drm_gem_object_init(dev, &obj->base, size) != 0) { |
42dcedd4 | 4423 | i915_gem_object_free(obj); |
c397b908 DV |
4424 | return NULL; |
4425 | } | |
673a394b | 4426 | |
bed1ea95 CW |
4427 | mask = GFP_HIGHUSER | __GFP_RECLAIMABLE; |
4428 | if (IS_CRESTLINE(dev) || IS_BROADWATER(dev)) { | |
4429 | /* 965gm cannot relocate objects above 4GiB. */ | |
4430 | mask &= ~__GFP_HIGHMEM; | |
4431 | mask |= __GFP_DMA32; | |
4432 | } | |
4433 | ||
496ad9aa | 4434 | mapping = file_inode(obj->base.filp)->i_mapping; |
bed1ea95 | 4435 | mapping_set_gfp_mask(mapping, mask); |
5949eac4 | 4436 | |
37e680a1 | 4437 | i915_gem_object_init(obj, &i915_gem_object_ops); |
73aa808f | 4438 | |
c397b908 DV |
4439 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
4440 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; | |
673a394b | 4441 | |
3d29b842 ED |
4442 | if (HAS_LLC(dev)) { |
4443 | /* On some devices, we can have the GPU use the LLC (the CPU | |
a1871112 EA |
4444 | * cache) for about a 10% performance improvement |
4445 | * compared to uncached. Graphics requests other than | |
4446 | * display scanout are coherent with the CPU in | |
4447 | * accessing this cache. This means in this mode we | |
4448 | * don't need to clflush on the CPU side, and on the | |
4449 | * GPU side we only need to flush internal caches to | |
4450 | * get data visible to the CPU. | |
4451 | * | |
4452 | * However, we maintain the display planes as UC, and so | |
4453 | * need to rebind when first used as such. | |
4454 | */ | |
4455 | obj->cache_level = I915_CACHE_LLC; | |
4456 | } else | |
4457 | obj->cache_level = I915_CACHE_NONE; | |
4458 | ||
d861e338 DV |
4459 | trace_i915_gem_object_create(obj); |
4460 | ||
05394f39 | 4461 | return obj; |
c397b908 DV |
4462 | } |
4463 | ||
340fbd8c CW |
4464 | static bool discard_backing_storage(struct drm_i915_gem_object *obj) |
4465 | { | |
4466 | /* If we are the last user of the backing storage (be it shmemfs | |
4467 | * pages or stolen etc), we know that the pages are going to be | |
4468 | * immediately released. In this case, we can then skip copying | |
4469 | * back the contents from the GPU. | |
4470 | */ | |
4471 | ||
4472 | if (obj->madv != I915_MADV_WILLNEED) | |
4473 | return false; | |
4474 | ||
4475 | if (obj->base.filp == NULL) | |
4476 | return true; | |
4477 | ||
4478 | /* At first glance, this looks racy, but then again so would be | |
4479 | * userspace racing mmap against close. However, the first external | |
4480 | * reference to the filp can only be obtained through the | |
4481 | * i915_gem_mmap_ioctl() which safeguards us against the user | |
4482 | * acquiring such a reference whilst we are in the middle of | |
4483 | * freeing the object. | |
4484 | */ | |
4485 | return atomic_long_read(&obj->base.filp->f_count) == 1; | |
4486 | } | |
4487 | ||
1488fc08 | 4488 | void i915_gem_free_object(struct drm_gem_object *gem_obj) |
673a394b | 4489 | { |
1488fc08 | 4490 | struct drm_i915_gem_object *obj = to_intel_bo(gem_obj); |
05394f39 | 4491 | struct drm_device *dev = obj->base.dev; |
3e31c6c0 | 4492 | struct drm_i915_private *dev_priv = dev->dev_private; |
07fe0b12 | 4493 | struct i915_vma *vma, *next; |
673a394b | 4494 | |
f65c9168 PZ |
4495 | intel_runtime_pm_get(dev_priv); |
4496 | ||
26e12f89 CW |
4497 | trace_i915_gem_object_destroy(obj); |
4498 | ||
07fe0b12 | 4499 | list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) { |
d7f46fc4 BW |
4500 | int ret; |
4501 | ||
4502 | vma->pin_count = 0; | |
4503 | ret = i915_vma_unbind(vma); | |
07fe0b12 BW |
4504 | if (WARN_ON(ret == -ERESTARTSYS)) { |
4505 | bool was_interruptible; | |
1488fc08 | 4506 | |
07fe0b12 BW |
4507 | was_interruptible = dev_priv->mm.interruptible; |
4508 | dev_priv->mm.interruptible = false; | |
1488fc08 | 4509 | |
07fe0b12 | 4510 | WARN_ON(i915_vma_unbind(vma)); |
1488fc08 | 4511 | |
07fe0b12 BW |
4512 | dev_priv->mm.interruptible = was_interruptible; |
4513 | } | |
1488fc08 CW |
4514 | } |
4515 | ||
1d64ae71 BW |
4516 | /* Stolen objects don't hold a ref, but do hold pin count. Fix that up |
4517 | * before progressing. */ | |
4518 | if (obj->stolen) | |
4519 | i915_gem_object_unpin_pages(obj); | |
4520 | ||
a071fa00 DV |
4521 | WARN_ON(obj->frontbuffer_bits); |
4522 | ||
656bfa3a DV |
4523 | if (obj->pages && obj->madv == I915_MADV_WILLNEED && |
4524 | dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES && | |
4525 | obj->tiling_mode != I915_TILING_NONE) | |
4526 | i915_gem_object_unpin_pages(obj); | |
4527 | ||
401c29f6 BW |
4528 | if (WARN_ON(obj->pages_pin_count)) |
4529 | obj->pages_pin_count = 0; | |
340fbd8c | 4530 | if (discard_backing_storage(obj)) |
5537252b | 4531 | obj->madv = I915_MADV_DONTNEED; |
37e680a1 | 4532 | i915_gem_object_put_pages(obj); |
d8cb5086 | 4533 | i915_gem_object_free_mmap_offset(obj); |
de151cf6 | 4534 | |
9da3da66 CW |
4535 | BUG_ON(obj->pages); |
4536 | ||
2f745ad3 CW |
4537 | if (obj->base.import_attach) |
4538 | drm_prime_gem_destroy(&obj->base, NULL); | |
de151cf6 | 4539 | |
5cc9ed4b CW |
4540 | if (obj->ops->release) |
4541 | obj->ops->release(obj); | |
4542 | ||
05394f39 CW |
4543 | drm_gem_object_release(&obj->base); |
4544 | i915_gem_info_remove_obj(dev_priv, obj->base.size); | |
c397b908 | 4545 | |
05394f39 | 4546 | kfree(obj->bit_17); |
42dcedd4 | 4547 | i915_gem_object_free(obj); |
f65c9168 PZ |
4548 | |
4549 | intel_runtime_pm_put(dev_priv); | |
673a394b EA |
4550 | } |
4551 | ||
e656a6cb | 4552 | struct i915_vma *i915_gem_obj_to_vma(struct drm_i915_gem_object *obj, |
2f633156 | 4553 | struct i915_address_space *vm) |
e656a6cb DV |
4554 | { |
4555 | struct i915_vma *vma; | |
4556 | list_for_each_entry(vma, &obj->vma_list, vma_link) | |
4557 | if (vma->vm == vm) | |
4558 | return vma; | |
4559 | ||
4560 | return NULL; | |
4561 | } | |
4562 | ||
2f633156 BW |
4563 | void i915_gem_vma_destroy(struct i915_vma *vma) |
4564 | { | |
b9d06dd9 | 4565 | struct i915_address_space *vm = NULL; |
2f633156 | 4566 | WARN_ON(vma->node.allocated); |
aaa05667 CW |
4567 | |
4568 | /* Keep the vma as a placeholder in the execbuffer reservation lists */ | |
4569 | if (!list_empty(&vma->exec_list)) | |
4570 | return; | |
4571 | ||
b9d06dd9 | 4572 | vm = vma->vm; |
b9d06dd9 | 4573 | |
841cd773 DV |
4574 | if (!i915_is_ggtt(vm)) |
4575 | i915_ppgtt_put(i915_vm_to_ppgtt(vm)); | |
b9d06dd9 | 4576 | |
8b9c2b94 | 4577 | list_del(&vma->vma_link); |
b93dab6e | 4578 | |
2f633156 BW |
4579 | kfree(vma); |
4580 | } | |
4581 | ||
e3efda49 CW |
4582 | static void |
4583 | i915_gem_stop_ringbuffers(struct drm_device *dev) | |
4584 | { | |
4585 | struct drm_i915_private *dev_priv = dev->dev_private; | |
a4872ba6 | 4586 | struct intel_engine_cs *ring; |
e3efda49 CW |
4587 | int i; |
4588 | ||
4589 | for_each_ring(ring, dev_priv, i) | |
a83014d3 | 4590 | dev_priv->gt.stop_ring(ring); |
e3efda49 CW |
4591 | } |
4592 | ||
29105ccc | 4593 | int |
45c5f202 | 4594 | i915_gem_suspend(struct drm_device *dev) |
29105ccc | 4595 | { |
3e31c6c0 | 4596 | struct drm_i915_private *dev_priv = dev->dev_private; |
45c5f202 | 4597 | int ret = 0; |
28dfe52a | 4598 | |
45c5f202 | 4599 | mutex_lock(&dev->struct_mutex); |
b2da9fe5 | 4600 | ret = i915_gpu_idle(dev); |
f7403347 | 4601 | if (ret) |
45c5f202 | 4602 | goto err; |
f7403347 | 4603 | |
b2da9fe5 | 4604 | i915_gem_retire_requests(dev); |
673a394b | 4605 | |
29105ccc | 4606 | /* Under UMS, be paranoid and evict. */ |
a39d7efc | 4607 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
6c085a72 | 4608 | i915_gem_evict_everything(dev); |
29105ccc | 4609 | |
e3efda49 | 4610 | i915_gem_stop_ringbuffers(dev); |
45c5f202 CW |
4611 | mutex_unlock(&dev->struct_mutex); |
4612 | ||
4613 | del_timer_sync(&dev_priv->gpu_error.hangcheck_timer); | |
29105ccc | 4614 | cancel_delayed_work_sync(&dev_priv->mm.retire_work); |
274fa1c1 | 4615 | flush_delayed_work(&dev_priv->mm.idle_work); |
29105ccc | 4616 | |
bdcf120b CW |
4617 | /* Assert that we sucessfully flushed all the work and |
4618 | * reset the GPU back to its idle, low power state. | |
4619 | */ | |
4620 | WARN_ON(dev_priv->mm.busy); | |
4621 | ||
673a394b | 4622 | return 0; |
45c5f202 CW |
4623 | |
4624 | err: | |
4625 | mutex_unlock(&dev->struct_mutex); | |
4626 | return ret; | |
673a394b EA |
4627 | } |
4628 | ||
a4872ba6 | 4629 | int i915_gem_l3_remap(struct intel_engine_cs *ring, int slice) |
b9524a1e | 4630 | { |
c3787e2e | 4631 | struct drm_device *dev = ring->dev; |
3e31c6c0 | 4632 | struct drm_i915_private *dev_priv = dev->dev_private; |
35a85ac6 BW |
4633 | u32 reg_base = GEN7_L3LOG_BASE + (slice * 0x200); |
4634 | u32 *remap_info = dev_priv->l3_parity.remap_info[slice]; | |
c3787e2e | 4635 | int i, ret; |
b9524a1e | 4636 | |
040d2baa | 4637 | if (!HAS_L3_DPF(dev) || !remap_info) |
c3787e2e | 4638 | return 0; |
b9524a1e | 4639 | |
c3787e2e BW |
4640 | ret = intel_ring_begin(ring, GEN7_L3LOG_SIZE / 4 * 3); |
4641 | if (ret) | |
4642 | return ret; | |
b9524a1e | 4643 | |
c3787e2e BW |
4644 | /* |
4645 | * Note: We do not worry about the concurrent register cacheline hang | |
4646 | * here because no other code should access these registers other than | |
4647 | * at initialization time. | |
4648 | */ | |
b9524a1e | 4649 | for (i = 0; i < GEN7_L3LOG_SIZE; i += 4) { |
c3787e2e BW |
4650 | intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1)); |
4651 | intel_ring_emit(ring, reg_base + i); | |
4652 | intel_ring_emit(ring, remap_info[i/4]); | |
b9524a1e BW |
4653 | } |
4654 | ||
c3787e2e | 4655 | intel_ring_advance(ring); |
b9524a1e | 4656 | |
c3787e2e | 4657 | return ret; |
b9524a1e BW |
4658 | } |
4659 | ||
f691e2f4 DV |
4660 | void i915_gem_init_swizzling(struct drm_device *dev) |
4661 | { | |
3e31c6c0 | 4662 | struct drm_i915_private *dev_priv = dev->dev_private; |
f691e2f4 | 4663 | |
11782b02 | 4664 | if (INTEL_INFO(dev)->gen < 5 || |
f691e2f4 DV |
4665 | dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE) |
4666 | return; | |
4667 | ||
4668 | I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) | | |
4669 | DISP_TILE_SURFACE_SWIZZLING); | |
4670 | ||
11782b02 DV |
4671 | if (IS_GEN5(dev)) |
4672 | return; | |
4673 | ||
f691e2f4 DV |
4674 | I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL); |
4675 | if (IS_GEN6(dev)) | |
6b26c86d | 4676 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB)); |
8782e26c | 4677 | else if (IS_GEN7(dev)) |
6b26c86d | 4678 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB)); |
31a5336e BW |
4679 | else if (IS_GEN8(dev)) |
4680 | I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_BDW)); | |
8782e26c BW |
4681 | else |
4682 | BUG(); | |
f691e2f4 | 4683 | } |
e21af88d | 4684 | |
67b1b571 CW |
4685 | static bool |
4686 | intel_enable_blt(struct drm_device *dev) | |
4687 | { | |
4688 | if (!HAS_BLT(dev)) | |
4689 | return false; | |
4690 | ||
4691 | /* The blitter was dysfunctional on early prototypes */ | |
4692 | if (IS_GEN6(dev) && dev->pdev->revision < 8) { | |
4693 | DRM_INFO("BLT not supported on this pre-production hardware;" | |
4694 | " graphics performance will be degraded.\n"); | |
4695 | return false; | |
4696 | } | |
4697 | ||
4698 | return true; | |
4699 | } | |
4700 | ||
81e7f200 VS |
4701 | static void init_unused_ring(struct drm_device *dev, u32 base) |
4702 | { | |
4703 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4704 | ||
4705 | I915_WRITE(RING_CTL(base), 0); | |
4706 | I915_WRITE(RING_HEAD(base), 0); | |
4707 | I915_WRITE(RING_TAIL(base), 0); | |
4708 | I915_WRITE(RING_START(base), 0); | |
4709 | } | |
4710 | ||
4711 | static void init_unused_rings(struct drm_device *dev) | |
4712 | { | |
4713 | if (IS_I830(dev)) { | |
4714 | init_unused_ring(dev, PRB1_BASE); | |
4715 | init_unused_ring(dev, SRB0_BASE); | |
4716 | init_unused_ring(dev, SRB1_BASE); | |
4717 | init_unused_ring(dev, SRB2_BASE); | |
4718 | init_unused_ring(dev, SRB3_BASE); | |
4719 | } else if (IS_GEN2(dev)) { | |
4720 | init_unused_ring(dev, SRB0_BASE); | |
4721 | init_unused_ring(dev, SRB1_BASE); | |
4722 | } else if (IS_GEN3(dev)) { | |
4723 | init_unused_ring(dev, PRB1_BASE); | |
4724 | init_unused_ring(dev, PRB2_BASE); | |
4725 | } | |
4726 | } | |
4727 | ||
a83014d3 | 4728 | int i915_gem_init_rings(struct drm_device *dev) |
8187a2b7 | 4729 | { |
4fc7c971 | 4730 | struct drm_i915_private *dev_priv = dev->dev_private; |
8187a2b7 | 4731 | int ret; |
68f95ba9 | 4732 | |
81e7f200 VS |
4733 | /* |
4734 | * At least 830 can leave some of the unused rings | |
4735 | * "active" (ie. head != tail) after resume which | |
4736 | * will prevent c3 entry. Makes sure all unused rings | |
4737 | * are totally idle. | |
4738 | */ | |
4739 | init_unused_rings(dev); | |
4740 | ||
5c1143bb | 4741 | ret = intel_init_render_ring_buffer(dev); |
68f95ba9 | 4742 | if (ret) |
b6913e4b | 4743 | return ret; |
68f95ba9 CW |
4744 | |
4745 | if (HAS_BSD(dev)) { | |
5c1143bb | 4746 | ret = intel_init_bsd_ring_buffer(dev); |
68f95ba9 CW |
4747 | if (ret) |
4748 | goto cleanup_render_ring; | |
d1b851fc | 4749 | } |
68f95ba9 | 4750 | |
67b1b571 | 4751 | if (intel_enable_blt(dev)) { |
549f7365 CW |
4752 | ret = intel_init_blt_ring_buffer(dev); |
4753 | if (ret) | |
4754 | goto cleanup_bsd_ring; | |
4755 | } | |
4756 | ||
9a8a2213 BW |
4757 | if (HAS_VEBOX(dev)) { |
4758 | ret = intel_init_vebox_ring_buffer(dev); | |
4759 | if (ret) | |
4760 | goto cleanup_blt_ring; | |
4761 | } | |
4762 | ||
845f74a7 ZY |
4763 | if (HAS_BSD2(dev)) { |
4764 | ret = intel_init_bsd2_ring_buffer(dev); | |
4765 | if (ret) | |
4766 | goto cleanup_vebox_ring; | |
4767 | } | |
9a8a2213 | 4768 | |
99433931 | 4769 | ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000)); |
4fc7c971 | 4770 | if (ret) |
845f74a7 | 4771 | goto cleanup_bsd2_ring; |
4fc7c971 BW |
4772 | |
4773 | return 0; | |
4774 | ||
845f74a7 ZY |
4775 | cleanup_bsd2_ring: |
4776 | intel_cleanup_ring_buffer(&dev_priv->ring[VCS2]); | |
9a8a2213 BW |
4777 | cleanup_vebox_ring: |
4778 | intel_cleanup_ring_buffer(&dev_priv->ring[VECS]); | |
4fc7c971 BW |
4779 | cleanup_blt_ring: |
4780 | intel_cleanup_ring_buffer(&dev_priv->ring[BCS]); | |
4781 | cleanup_bsd_ring: | |
4782 | intel_cleanup_ring_buffer(&dev_priv->ring[VCS]); | |
4783 | cleanup_render_ring: | |
4784 | intel_cleanup_ring_buffer(&dev_priv->ring[RCS]); | |
4785 | ||
4786 | return ret; | |
4787 | } | |
4788 | ||
4789 | int | |
4790 | i915_gem_init_hw(struct drm_device *dev) | |
4791 | { | |
3e31c6c0 | 4792 | struct drm_i915_private *dev_priv = dev->dev_private; |
35a85ac6 | 4793 | int ret, i; |
4fc7c971 BW |
4794 | |
4795 | if (INTEL_INFO(dev)->gen < 6 && !intel_enable_gtt()) | |
4796 | return -EIO; | |
4797 | ||
59124506 | 4798 | if (dev_priv->ellc_size) |
05e21cc4 | 4799 | I915_WRITE(HSW_IDICR, I915_READ(HSW_IDICR) | IDIHASHMSK(0xf)); |
4fc7c971 | 4800 | |
0bf21347 VS |
4801 | if (IS_HASWELL(dev)) |
4802 | I915_WRITE(MI_PREDICATE_RESULT_2, IS_HSW_GT3(dev) ? | |
4803 | LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED); | |
9435373e | 4804 | |
88a2b2a3 | 4805 | if (HAS_PCH_NOP(dev)) { |
6ba844b0 DV |
4806 | if (IS_IVYBRIDGE(dev)) { |
4807 | u32 temp = I915_READ(GEN7_MSG_CTL); | |
4808 | temp &= ~(WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK); | |
4809 | I915_WRITE(GEN7_MSG_CTL, temp); | |
4810 | } else if (INTEL_INFO(dev)->gen >= 7) { | |
4811 | u32 temp = I915_READ(HSW_NDE_RSTWRN_OPT); | |
4812 | temp &= ~RESET_PCH_HANDSHAKE_ENABLE; | |
4813 | I915_WRITE(HSW_NDE_RSTWRN_OPT, temp); | |
4814 | } | |
88a2b2a3 BW |
4815 | } |
4816 | ||
4fc7c971 BW |
4817 | i915_gem_init_swizzling(dev); |
4818 | ||
a83014d3 | 4819 | ret = dev_priv->gt.init_rings(dev); |
99433931 MK |
4820 | if (ret) |
4821 | return ret; | |
4822 | ||
c3787e2e BW |
4823 | for (i = 0; i < NUM_L3_SLICES(dev); i++) |
4824 | i915_gem_l3_remap(&dev_priv->ring[RCS], i); | |
4825 | ||
254f965c | 4826 | /* |
2fa48d8d BW |
4827 | * XXX: Contexts should only be initialized once. Doing a switch to the |
4828 | * default context switch however is something we'd like to do after | |
4829 | * reset or thaw (the latter may not actually be necessary for HW, but | |
4830 | * goes with our code better). Context switching requires rings (for | |
4831 | * the do_switch), but before enabling PPGTT. So don't move this. | |
254f965c | 4832 | */ |
2fa48d8d | 4833 | ret = i915_gem_context_enable(dev_priv); |
60990320 | 4834 | if (ret && ret != -EIO) { |
2fa48d8d | 4835 | DRM_ERROR("Context enable failed %d\n", ret); |
60990320 | 4836 | i915_gem_cleanup_ringbuffer(dev); |
82460d97 DV |
4837 | |
4838 | return ret; | |
4839 | } | |
4840 | ||
4841 | ret = i915_ppgtt_init_hw(dev); | |
4842 | if (ret && ret != -EIO) { | |
4843 | DRM_ERROR("PPGTT enable failed %d\n", ret); | |
4844 | i915_gem_cleanup_ringbuffer(dev); | |
b7c36d25 | 4845 | } |
e21af88d | 4846 | |
2fa48d8d | 4847 | return ret; |
8187a2b7 ZN |
4848 | } |
4849 | ||
1070a42b CW |
4850 | int i915_gem_init(struct drm_device *dev) |
4851 | { | |
4852 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1070a42b CW |
4853 | int ret; |
4854 | ||
127f1003 OM |
4855 | i915.enable_execlists = intel_sanitize_enable_execlists(dev, |
4856 | i915.enable_execlists); | |
4857 | ||
1070a42b | 4858 | mutex_lock(&dev->struct_mutex); |
d62b4892 JB |
4859 | |
4860 | if (IS_VALLEYVIEW(dev)) { | |
4861 | /* VLVA0 (potential hack), BIOS isn't actually waking us */ | |
981a5aea ID |
4862 | I915_WRITE(VLV_GTLC_WAKE_CTRL, VLV_GTLC_ALLOWWAKEREQ); |
4863 | if (wait_for((I915_READ(VLV_GTLC_PW_STATUS) & | |
4864 | VLV_GTLC_ALLOWWAKEACK), 10)) | |
d62b4892 JB |
4865 | DRM_DEBUG_DRIVER("allow wake ack timed out\n"); |
4866 | } | |
4867 | ||
a83014d3 OM |
4868 | if (!i915.enable_execlists) { |
4869 | dev_priv->gt.do_execbuf = i915_gem_ringbuffer_submission; | |
4870 | dev_priv->gt.init_rings = i915_gem_init_rings; | |
4871 | dev_priv->gt.cleanup_ring = intel_cleanup_ring_buffer; | |
4872 | dev_priv->gt.stop_ring = intel_stop_ring_buffer; | |
454afebd OM |
4873 | } else { |
4874 | dev_priv->gt.do_execbuf = intel_execlists_submission; | |
4875 | dev_priv->gt.init_rings = intel_logical_rings_init; | |
4876 | dev_priv->gt.cleanup_ring = intel_logical_ring_cleanup; | |
4877 | dev_priv->gt.stop_ring = intel_logical_ring_stop; | |
a83014d3 OM |
4878 | } |
4879 | ||
6c5566a8 DV |
4880 | ret = i915_gem_init_userptr(dev); |
4881 | if (ret) { | |
4882 | mutex_unlock(&dev->struct_mutex); | |
4883 | return ret; | |
4884 | } | |
4885 | ||
d7e5008f | 4886 | i915_gem_init_global_gtt(dev); |
d62b4892 | 4887 | |
2fa48d8d | 4888 | ret = i915_gem_context_init(dev); |
e3848694 MK |
4889 | if (ret) { |
4890 | mutex_unlock(&dev->struct_mutex); | |
2fa48d8d | 4891 | return ret; |
e3848694 | 4892 | } |
2fa48d8d | 4893 | |
1070a42b | 4894 | ret = i915_gem_init_hw(dev); |
60990320 CW |
4895 | if (ret == -EIO) { |
4896 | /* Allow ring initialisation to fail by marking the GPU as | |
4897 | * wedged. But we only want to do this where the GPU is angry, | |
4898 | * for all other failure, such as an allocation failure, bail. | |
4899 | */ | |
4900 | DRM_ERROR("Failed to initialize GPU, declaring it wedged\n"); | |
4901 | atomic_set_mask(I915_WEDGED, &dev_priv->gpu_error.reset_counter); | |
4902 | ret = 0; | |
1070a42b | 4903 | } |
60990320 | 4904 | mutex_unlock(&dev->struct_mutex); |
1070a42b | 4905 | |
60990320 | 4906 | return ret; |
1070a42b CW |
4907 | } |
4908 | ||
8187a2b7 ZN |
4909 | void |
4910 | i915_gem_cleanup_ringbuffer(struct drm_device *dev) | |
4911 | { | |
3e31c6c0 | 4912 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4872ba6 | 4913 | struct intel_engine_cs *ring; |
1ec14ad3 | 4914 | int i; |
8187a2b7 | 4915 | |
b4519513 | 4916 | for_each_ring(ring, dev_priv, i) |
a83014d3 | 4917 | dev_priv->gt.cleanup_ring(ring); |
8187a2b7 ZN |
4918 | } |
4919 | ||
64193406 | 4920 | static void |
a4872ba6 | 4921 | init_ring_lists(struct intel_engine_cs *ring) |
64193406 CW |
4922 | { |
4923 | INIT_LIST_HEAD(&ring->active_list); | |
4924 | INIT_LIST_HEAD(&ring->request_list); | |
64193406 CW |
4925 | } |
4926 | ||
7e0d96bc BW |
4927 | void i915_init_vm(struct drm_i915_private *dev_priv, |
4928 | struct i915_address_space *vm) | |
fc8c067e | 4929 | { |
7e0d96bc BW |
4930 | if (!i915_is_ggtt(vm)) |
4931 | drm_mm_init(&vm->mm, vm->start, vm->total); | |
fc8c067e BW |
4932 | vm->dev = dev_priv->dev; |
4933 | INIT_LIST_HEAD(&vm->active_list); | |
4934 | INIT_LIST_HEAD(&vm->inactive_list); | |
4935 | INIT_LIST_HEAD(&vm->global_link); | |
f72d21ed | 4936 | list_add_tail(&vm->global_link, &dev_priv->vm_list); |
fc8c067e BW |
4937 | } |
4938 | ||
673a394b EA |
4939 | void |
4940 | i915_gem_load(struct drm_device *dev) | |
4941 | { | |
3e31c6c0 | 4942 | struct drm_i915_private *dev_priv = dev->dev_private; |
42dcedd4 CW |
4943 | int i; |
4944 | ||
4945 | dev_priv->slab = | |
4946 | kmem_cache_create("i915_gem_object", | |
4947 | sizeof(struct drm_i915_gem_object), 0, | |
4948 | SLAB_HWCACHE_ALIGN, | |
4949 | NULL); | |
673a394b | 4950 | |
fc8c067e BW |
4951 | INIT_LIST_HEAD(&dev_priv->vm_list); |
4952 | i915_init_vm(dev_priv, &dev_priv->gtt.base); | |
4953 | ||
a33afea5 | 4954 | INIT_LIST_HEAD(&dev_priv->context_list); |
6c085a72 CW |
4955 | INIT_LIST_HEAD(&dev_priv->mm.unbound_list); |
4956 | INIT_LIST_HEAD(&dev_priv->mm.bound_list); | |
a09ba7fa | 4957 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
1ec14ad3 CW |
4958 | for (i = 0; i < I915_NUM_RINGS; i++) |
4959 | init_ring_lists(&dev_priv->ring[i]); | |
4b9de737 | 4960 | for (i = 0; i < I915_MAX_NUM_FENCES; i++) |
007cc8ac | 4961 | INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list); |
673a394b EA |
4962 | INIT_DELAYED_WORK(&dev_priv->mm.retire_work, |
4963 | i915_gem_retire_work_handler); | |
b29c19b6 CW |
4964 | INIT_DELAYED_WORK(&dev_priv->mm.idle_work, |
4965 | i915_gem_idle_work_handler); | |
1f83fee0 | 4966 | init_waitqueue_head(&dev_priv->gpu_error.reset_queue); |
31169714 | 4967 | |
94400120 | 4968 | /* On GEN3 we really need to make sure the ARB C3 LP bit is set */ |
dbb42748 | 4969 | if (!drm_core_check_feature(dev, DRIVER_MODESET) && IS_GEN3(dev)) { |
50743298 DV |
4970 | I915_WRITE(MI_ARB_STATE, |
4971 | _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE)); | |
94400120 DA |
4972 | } |
4973 | ||
72bfa19c CW |
4974 | dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL; |
4975 | ||
de151cf6 | 4976 | /* Old X drivers will take 0-2 for front, back, depth buffers */ |
b397c836 EA |
4977 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
4978 | dev_priv->fence_reg_start = 3; | |
de151cf6 | 4979 | |
42b5aeab VS |
4980 | if (INTEL_INFO(dev)->gen >= 7 && !IS_VALLEYVIEW(dev)) |
4981 | dev_priv->num_fence_regs = 32; | |
4982 | else if (INTEL_INFO(dev)->gen >= 4 || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) | |
de151cf6 JB |
4983 | dev_priv->num_fence_regs = 16; |
4984 | else | |
4985 | dev_priv->num_fence_regs = 8; | |
4986 | ||
b5aa8a0f | 4987 | /* Initialize fence registers to zero */ |
19b2dbde CW |
4988 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
4989 | i915_gem_restore_fences(dev); | |
10ed13e4 | 4990 | |
673a394b | 4991 | i915_gem_detect_bit_6_swizzle(dev); |
6b95a207 | 4992 | init_waitqueue_head(&dev_priv->pending_flip_queue); |
17250b71 | 4993 | |
ce453d81 CW |
4994 | dev_priv->mm.interruptible = true; |
4995 | ||
ceabbba5 CW |
4996 | dev_priv->mm.shrinker.scan_objects = i915_gem_shrinker_scan; |
4997 | dev_priv->mm.shrinker.count_objects = i915_gem_shrinker_count; | |
4998 | dev_priv->mm.shrinker.seeks = DEFAULT_SEEKS; | |
4999 | register_shrinker(&dev_priv->mm.shrinker); | |
2cfcd32a CW |
5000 | |
5001 | dev_priv->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom; | |
5002 | register_oom_notifier(&dev_priv->mm.oom_notifier); | |
f99d7069 DV |
5003 | |
5004 | mutex_init(&dev_priv->fb_tracking.lock); | |
673a394b | 5005 | } |
71acb5eb | 5006 | |
f787a5f5 | 5007 | void i915_gem_release(struct drm_device *dev, struct drm_file *file) |
b962442e | 5008 | { |
f787a5f5 | 5009 | struct drm_i915_file_private *file_priv = file->driver_priv; |
b962442e | 5010 | |
b29c19b6 CW |
5011 | cancel_delayed_work_sync(&file_priv->mm.idle_work); |
5012 | ||
b962442e EA |
5013 | /* Clean up our request list when the client is going away, so that |
5014 | * later retire_requests won't dereference our soon-to-be-gone | |
5015 | * file_priv. | |
5016 | */ | |
1c25595f | 5017 | spin_lock(&file_priv->mm.lock); |
f787a5f5 CW |
5018 | while (!list_empty(&file_priv->mm.request_list)) { |
5019 | struct drm_i915_gem_request *request; | |
5020 | ||
5021 | request = list_first_entry(&file_priv->mm.request_list, | |
5022 | struct drm_i915_gem_request, | |
5023 | client_list); | |
5024 | list_del(&request->client_list); | |
5025 | request->file_priv = NULL; | |
5026 | } | |
1c25595f | 5027 | spin_unlock(&file_priv->mm.lock); |
b962442e | 5028 | } |
31169714 | 5029 | |
b29c19b6 CW |
5030 | static void |
5031 | i915_gem_file_idle_work_handler(struct work_struct *work) | |
5032 | { | |
5033 | struct drm_i915_file_private *file_priv = | |
5034 | container_of(work, typeof(*file_priv), mm.idle_work.work); | |
5035 | ||
5036 | atomic_set(&file_priv->rps_wait_boost, false); | |
5037 | } | |
5038 | ||
5039 | int i915_gem_open(struct drm_device *dev, struct drm_file *file) | |
5040 | { | |
5041 | struct drm_i915_file_private *file_priv; | |
e422b888 | 5042 | int ret; |
b29c19b6 CW |
5043 | |
5044 | DRM_DEBUG_DRIVER("\n"); | |
5045 | ||
5046 | file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); | |
5047 | if (!file_priv) | |
5048 | return -ENOMEM; | |
5049 | ||
5050 | file->driver_priv = file_priv; | |
5051 | file_priv->dev_priv = dev->dev_private; | |
ab0e7ff9 | 5052 | file_priv->file = file; |
b29c19b6 CW |
5053 | |
5054 | spin_lock_init(&file_priv->mm.lock); | |
5055 | INIT_LIST_HEAD(&file_priv->mm.request_list); | |
5056 | INIT_DELAYED_WORK(&file_priv->mm.idle_work, | |
5057 | i915_gem_file_idle_work_handler); | |
5058 | ||
e422b888 BW |
5059 | ret = i915_gem_context_open(dev, file); |
5060 | if (ret) | |
5061 | kfree(file_priv); | |
b29c19b6 | 5062 | |
e422b888 | 5063 | return ret; |
b29c19b6 CW |
5064 | } |
5065 | ||
b680c37a DV |
5066 | /** |
5067 | * i915_gem_track_fb - update frontbuffer tracking | |
5068 | * old: current GEM buffer for the frontbuffer slots | |
5069 | * new: new GEM buffer for the frontbuffer slots | |
5070 | * frontbuffer_bits: bitmask of frontbuffer slots | |
5071 | * | |
5072 | * This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them | |
5073 | * from @old and setting them in @new. Both @old and @new can be NULL. | |
5074 | */ | |
a071fa00 DV |
5075 | void i915_gem_track_fb(struct drm_i915_gem_object *old, |
5076 | struct drm_i915_gem_object *new, | |
5077 | unsigned frontbuffer_bits) | |
5078 | { | |
5079 | if (old) { | |
5080 | WARN_ON(!mutex_is_locked(&old->base.dev->struct_mutex)); | |
5081 | WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits)); | |
5082 | old->frontbuffer_bits &= ~frontbuffer_bits; | |
5083 | } | |
5084 | ||
5085 | if (new) { | |
5086 | WARN_ON(!mutex_is_locked(&new->base.dev->struct_mutex)); | |
5087 | WARN_ON(new->frontbuffer_bits & frontbuffer_bits); | |
5088 | new->frontbuffer_bits |= frontbuffer_bits; | |
5089 | } | |
5090 | } | |
5091 | ||
5774506f CW |
5092 | static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task) |
5093 | { | |
5094 | if (!mutex_is_locked(mutex)) | |
5095 | return false; | |
5096 | ||
5097 | #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES) | |
5098 | return mutex->owner == task; | |
5099 | #else | |
5100 | /* Since UP may be pre-empted, we cannot assume that we own the lock */ | |
5101 | return false; | |
5102 | #endif | |
5103 | } | |
5104 | ||
b453c4db CW |
5105 | static bool i915_gem_shrinker_lock(struct drm_device *dev, bool *unlock) |
5106 | { | |
5107 | if (!mutex_trylock(&dev->struct_mutex)) { | |
5108 | if (!mutex_is_locked_by(&dev->struct_mutex, current)) | |
5109 | return false; | |
5110 | ||
5111 | if (to_i915(dev)->mm.shrinker_no_lock_stealing) | |
5112 | return false; | |
5113 | ||
5114 | *unlock = false; | |
5115 | } else | |
5116 | *unlock = true; | |
5117 | ||
5118 | return true; | |
5119 | } | |
5120 | ||
ceabbba5 CW |
5121 | static int num_vma_bound(struct drm_i915_gem_object *obj) |
5122 | { | |
5123 | struct i915_vma *vma; | |
5124 | int count = 0; | |
5125 | ||
5126 | list_for_each_entry(vma, &obj->vma_list, vma_link) | |
5127 | if (drm_mm_node_allocated(&vma->node)) | |
5128 | count++; | |
5129 | ||
5130 | return count; | |
5131 | } | |
5132 | ||
7dc19d5a | 5133 | static unsigned long |
ceabbba5 | 5134 | i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) |
31169714 | 5135 | { |
17250b71 | 5136 | struct drm_i915_private *dev_priv = |
ceabbba5 | 5137 | container_of(shrinker, struct drm_i915_private, mm.shrinker); |
17250b71 | 5138 | struct drm_device *dev = dev_priv->dev; |
6c085a72 | 5139 | struct drm_i915_gem_object *obj; |
7dc19d5a | 5140 | unsigned long count; |
b453c4db | 5141 | bool unlock; |
17250b71 | 5142 | |
b453c4db CW |
5143 | if (!i915_gem_shrinker_lock(dev, &unlock)) |
5144 | return 0; | |
31169714 | 5145 | |
7dc19d5a | 5146 | count = 0; |
35c20a60 | 5147 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list) |
a5570178 | 5148 | if (obj->pages_pin_count == 0) |
7dc19d5a | 5149 | count += obj->base.size >> PAGE_SHIFT; |
fcb4a578 BW |
5150 | |
5151 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) { | |
ceabbba5 CW |
5152 | if (!i915_gem_obj_is_pinned(obj) && |
5153 | obj->pages_pin_count == num_vma_bound(obj)) | |
7dc19d5a | 5154 | count += obj->base.size >> PAGE_SHIFT; |
fcb4a578 | 5155 | } |
17250b71 | 5156 | |
5774506f CW |
5157 | if (unlock) |
5158 | mutex_unlock(&dev->struct_mutex); | |
d9973b43 | 5159 | |
7dc19d5a | 5160 | return count; |
31169714 | 5161 | } |
a70a3148 BW |
5162 | |
5163 | /* All the new VM stuff */ | |
5164 | unsigned long i915_gem_obj_offset(struct drm_i915_gem_object *o, | |
5165 | struct i915_address_space *vm) | |
5166 | { | |
5167 | struct drm_i915_private *dev_priv = o->base.dev->dev_private; | |
5168 | struct i915_vma *vma; | |
5169 | ||
896ab1a5 | 5170 | WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base); |
a70a3148 | 5171 | |
a70a3148 BW |
5172 | list_for_each_entry(vma, &o->vma_list, vma_link) { |
5173 | if (vma->vm == vm) | |
5174 | return vma->node.start; | |
5175 | ||
5176 | } | |
f25748ea DV |
5177 | WARN(1, "%s vma for this object not found.\n", |
5178 | i915_is_ggtt(vm) ? "global" : "ppgtt"); | |
a70a3148 BW |
5179 | return -1; |
5180 | } | |
5181 | ||
5182 | bool i915_gem_obj_bound(struct drm_i915_gem_object *o, | |
5183 | struct i915_address_space *vm) | |
5184 | { | |
5185 | struct i915_vma *vma; | |
5186 | ||
5187 | list_for_each_entry(vma, &o->vma_list, vma_link) | |
8b9c2b94 | 5188 | if (vma->vm == vm && drm_mm_node_allocated(&vma->node)) |
a70a3148 BW |
5189 | return true; |
5190 | ||
5191 | return false; | |
5192 | } | |
5193 | ||
5194 | bool i915_gem_obj_bound_any(struct drm_i915_gem_object *o) | |
5195 | { | |
5a1d5eb0 | 5196 | struct i915_vma *vma; |
a70a3148 | 5197 | |
5a1d5eb0 CW |
5198 | list_for_each_entry(vma, &o->vma_list, vma_link) |
5199 | if (drm_mm_node_allocated(&vma->node)) | |
a70a3148 BW |
5200 | return true; |
5201 | ||
5202 | return false; | |
5203 | } | |
5204 | ||
5205 | unsigned long i915_gem_obj_size(struct drm_i915_gem_object *o, | |
5206 | struct i915_address_space *vm) | |
5207 | { | |
5208 | struct drm_i915_private *dev_priv = o->base.dev->dev_private; | |
5209 | struct i915_vma *vma; | |
5210 | ||
896ab1a5 | 5211 | WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base); |
a70a3148 BW |
5212 | |
5213 | BUG_ON(list_empty(&o->vma_list)); | |
5214 | ||
5215 | list_for_each_entry(vma, &o->vma_list, vma_link) | |
5216 | if (vma->vm == vm) | |
5217 | return vma->node.size; | |
5218 | ||
5219 | return 0; | |
5220 | } | |
5221 | ||
7dc19d5a | 5222 | static unsigned long |
ceabbba5 | 5223 | i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) |
7dc19d5a DC |
5224 | { |
5225 | struct drm_i915_private *dev_priv = | |
ceabbba5 | 5226 | container_of(shrinker, struct drm_i915_private, mm.shrinker); |
7dc19d5a | 5227 | struct drm_device *dev = dev_priv->dev; |
7dc19d5a | 5228 | unsigned long freed; |
b453c4db | 5229 | bool unlock; |
7dc19d5a | 5230 | |
b453c4db CW |
5231 | if (!i915_gem_shrinker_lock(dev, &unlock)) |
5232 | return SHRINK_STOP; | |
7dc19d5a | 5233 | |
21ab4e74 CW |
5234 | freed = i915_gem_shrink(dev_priv, |
5235 | sc->nr_to_scan, | |
5236 | I915_SHRINK_BOUND | | |
5237 | I915_SHRINK_UNBOUND | | |
5238 | I915_SHRINK_PURGEABLE); | |
d9973b43 | 5239 | if (freed < sc->nr_to_scan) |
21ab4e74 CW |
5240 | freed += i915_gem_shrink(dev_priv, |
5241 | sc->nr_to_scan - freed, | |
5242 | I915_SHRINK_BOUND | | |
5243 | I915_SHRINK_UNBOUND); | |
7dc19d5a DC |
5244 | if (unlock) |
5245 | mutex_unlock(&dev->struct_mutex); | |
d9973b43 | 5246 | |
7dc19d5a DC |
5247 | return freed; |
5248 | } | |
5c2abbea | 5249 | |
2cfcd32a CW |
5250 | static int |
5251 | i915_gem_shrinker_oom(struct notifier_block *nb, unsigned long event, void *ptr) | |
5252 | { | |
5253 | struct drm_i915_private *dev_priv = | |
5254 | container_of(nb, struct drm_i915_private, mm.oom_notifier); | |
5255 | struct drm_device *dev = dev_priv->dev; | |
5256 | struct drm_i915_gem_object *obj; | |
5257 | unsigned long timeout = msecs_to_jiffies(5000) + 1; | |
005445c5 | 5258 | unsigned long pinned, bound, unbound, freed_pages; |
2cfcd32a CW |
5259 | bool was_interruptible; |
5260 | bool unlock; | |
5261 | ||
a1db2fa7 | 5262 | while (!i915_gem_shrinker_lock(dev, &unlock) && --timeout) { |
2cfcd32a | 5263 | schedule_timeout_killable(1); |
a1db2fa7 CW |
5264 | if (fatal_signal_pending(current)) |
5265 | return NOTIFY_DONE; | |
5266 | } | |
2cfcd32a CW |
5267 | if (timeout == 0) { |
5268 | pr_err("Unable to purge GPU memory due lock contention.\n"); | |
5269 | return NOTIFY_DONE; | |
5270 | } | |
5271 | ||
5272 | was_interruptible = dev_priv->mm.interruptible; | |
5273 | dev_priv->mm.interruptible = false; | |
5274 | ||
005445c5 | 5275 | freed_pages = i915_gem_shrink_all(dev_priv); |
2cfcd32a CW |
5276 | |
5277 | dev_priv->mm.interruptible = was_interruptible; | |
5278 | ||
5279 | /* Because we may be allocating inside our own driver, we cannot | |
5280 | * assert that there are no objects with pinned pages that are not | |
5281 | * being pointed to by hardware. | |
5282 | */ | |
5283 | unbound = bound = pinned = 0; | |
5284 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list) { | |
5285 | if (!obj->base.filp) /* not backed by a freeable object */ | |
5286 | continue; | |
5287 | ||
5288 | if (obj->pages_pin_count) | |
5289 | pinned += obj->base.size; | |
5290 | else | |
5291 | unbound += obj->base.size; | |
5292 | } | |
5293 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) { | |
5294 | if (!obj->base.filp) | |
5295 | continue; | |
5296 | ||
5297 | if (obj->pages_pin_count) | |
5298 | pinned += obj->base.size; | |
5299 | else | |
5300 | bound += obj->base.size; | |
5301 | } | |
5302 | ||
5303 | if (unlock) | |
5304 | mutex_unlock(&dev->struct_mutex); | |
5305 | ||
bb9059d3 CW |
5306 | if (freed_pages || unbound || bound) |
5307 | pr_info("Purging GPU memory, %lu bytes freed, %lu bytes still pinned.\n", | |
5308 | freed_pages << PAGE_SHIFT, pinned); | |
2cfcd32a CW |
5309 | if (unbound || bound) |
5310 | pr_err("%lu and %lu bytes still available in the " | |
5311 | "bound and unbound GPU page lists.\n", | |
5312 | bound, unbound); | |
5313 | ||
005445c5 | 5314 | *(unsigned long *)ptr += freed_pages; |
2cfcd32a CW |
5315 | return NOTIFY_DONE; |
5316 | } | |
5317 | ||
5c2abbea BW |
5318 | struct i915_vma *i915_gem_obj_to_ggtt(struct drm_i915_gem_object *obj) |
5319 | { | |
5320 | struct i915_vma *vma; | |
5321 | ||
5c2abbea | 5322 | vma = list_first_entry(&obj->vma_list, typeof(*vma), vma_link); |
5dc383b0 | 5323 | if (vma->vm != i915_obj_to_ggtt(obj)) |
5c2abbea BW |
5324 | return NULL; |
5325 | ||
5326 | return vma; | |
5327 | } |