Commit | Line | Data |
---|---|---|
673a394b | 1 | /* |
be6a0376 | 2 | * Copyright © 2008-2015 Intel Corporation |
673a394b EA |
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" |
eb82289a | 32 | #include "i915_vgpu.h" |
1c5d22f7 | 33 | #include "i915_trace.h" |
652c393a | 34 | #include "intel_drv.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 | |
b4716185 CW |
41 | #define RQ_BUG_ON(expr) |
42 | ||
05394f39 | 43 | static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj); |
e62b59e4 | 44 | static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj); |
c8725f3d | 45 | static void |
b4716185 CW |
46 | i915_gem_object_retire__write(struct drm_i915_gem_object *obj); |
47 | static void | |
48 | i915_gem_object_retire__read(struct drm_i915_gem_object *obj, int ring); | |
61050808 CW |
49 | static void i915_gem_write_fence(struct drm_device *dev, int reg, |
50 | struct drm_i915_gem_object *obj); | |
51 | static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, | |
52 | struct drm_i915_fence_reg *fence, | |
53 | bool enable); | |
54 | ||
c76ce038 CW |
55 | static bool cpu_cache_is_coherent(struct drm_device *dev, |
56 | enum i915_cache_level level) | |
57 | { | |
58 | return HAS_LLC(dev) || level != I915_CACHE_NONE; | |
59 | } | |
60 | ||
2c22569b CW |
61 | static bool cpu_write_needs_clflush(struct drm_i915_gem_object *obj) |
62 | { | |
63 | if (!cpu_cache_is_coherent(obj->base.dev, obj->cache_level)) | |
64 | return true; | |
65 | ||
66 | return obj->pin_display; | |
67 | } | |
68 | ||
61050808 CW |
69 | static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj) |
70 | { | |
71 | if (obj->tiling_mode) | |
72 | i915_gem_release_mmap(obj); | |
73 | ||
74 | /* As we do not have an associated fence register, we will force | |
75 | * a tiling change if we ever need to acquire one. | |
76 | */ | |
5d82e3e6 | 77 | obj->fence_dirty = false; |
61050808 CW |
78 | obj->fence_reg = I915_FENCE_REG_NONE; |
79 | } | |
80 | ||
73aa808f CW |
81 | /* some bookkeeping */ |
82 | static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv, | |
83 | size_t size) | |
84 | { | |
c20e8355 | 85 | spin_lock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
86 | dev_priv->mm.object_count++; |
87 | dev_priv->mm.object_memory += size; | |
c20e8355 | 88 | spin_unlock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
89 | } |
90 | ||
91 | static void i915_gem_info_remove_obj(struct drm_i915_private *dev_priv, | |
92 | size_t size) | |
93 | { | |
c20e8355 | 94 | spin_lock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
95 | dev_priv->mm.object_count--; |
96 | dev_priv->mm.object_memory -= size; | |
c20e8355 | 97 | spin_unlock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
98 | } |
99 | ||
21dd3734 | 100 | static int |
33196ded | 101 | i915_gem_wait_for_error(struct i915_gpu_error *error) |
30dbf0c0 | 102 | { |
30dbf0c0 CW |
103 | int ret; |
104 | ||
7abb690a DV |
105 | #define EXIT_COND (!i915_reset_in_progress(error) || \ |
106 | i915_terminally_wedged(error)) | |
1f83fee0 | 107 | if (EXIT_COND) |
30dbf0c0 CW |
108 | return 0; |
109 | ||
0a6759c6 DV |
110 | /* |
111 | * Only wait 10 seconds for the gpu reset to complete to avoid hanging | |
112 | * userspace. If it takes that long something really bad is going on and | |
113 | * we should simply try to bail out and fail as gracefully as possible. | |
114 | */ | |
1f83fee0 DV |
115 | ret = wait_event_interruptible_timeout(error->reset_queue, |
116 | EXIT_COND, | |
117 | 10*HZ); | |
0a6759c6 DV |
118 | if (ret == 0) { |
119 | DRM_ERROR("Timed out waiting for the gpu reset to complete\n"); | |
120 | return -EIO; | |
121 | } else if (ret < 0) { | |
30dbf0c0 | 122 | return ret; |
0a6759c6 | 123 | } |
1f83fee0 | 124 | #undef EXIT_COND |
30dbf0c0 | 125 | |
21dd3734 | 126 | return 0; |
30dbf0c0 CW |
127 | } |
128 | ||
54cf91dc | 129 | int i915_mutex_lock_interruptible(struct drm_device *dev) |
76c1dec1 | 130 | { |
33196ded | 131 | struct drm_i915_private *dev_priv = dev->dev_private; |
76c1dec1 CW |
132 | int ret; |
133 | ||
33196ded | 134 | ret = i915_gem_wait_for_error(&dev_priv->gpu_error); |
76c1dec1 CW |
135 | if (ret) |
136 | return ret; | |
137 | ||
138 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
139 | if (ret) | |
140 | return ret; | |
141 | ||
23bc5982 | 142 | WARN_ON(i915_verify_lists(dev)); |
76c1dec1 CW |
143 | return 0; |
144 | } | |
30dbf0c0 | 145 | |
5a125c3c EA |
146 | int |
147 | i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 148 | struct drm_file *file) |
5a125c3c | 149 | { |
73aa808f | 150 | struct drm_i915_private *dev_priv = dev->dev_private; |
5a125c3c | 151 | struct drm_i915_gem_get_aperture *args = data; |
ca1543be TU |
152 | struct i915_gtt *ggtt = &dev_priv->gtt; |
153 | struct i915_vma *vma; | |
6299f992 | 154 | size_t pinned; |
5a125c3c | 155 | |
6299f992 | 156 | pinned = 0; |
73aa808f | 157 | mutex_lock(&dev->struct_mutex); |
ca1543be TU |
158 | list_for_each_entry(vma, &ggtt->base.active_list, mm_list) |
159 | if (vma->pin_count) | |
160 | pinned += vma->node.size; | |
161 | list_for_each_entry(vma, &ggtt->base.inactive_list, mm_list) | |
162 | if (vma->pin_count) | |
163 | pinned += vma->node.size; | |
73aa808f | 164 | mutex_unlock(&dev->struct_mutex); |
5a125c3c | 165 | |
853ba5d2 | 166 | args->aper_size = dev_priv->gtt.base.total; |
0206e353 | 167 | args->aper_available_size = args->aper_size - pinned; |
6299f992 | 168 | |
5a125c3c EA |
169 | return 0; |
170 | } | |
171 | ||
6a2c4232 CW |
172 | static int |
173 | i915_gem_object_get_pages_phys(struct drm_i915_gem_object *obj) | |
00731155 | 174 | { |
6a2c4232 CW |
175 | struct address_space *mapping = file_inode(obj->base.filp)->i_mapping; |
176 | char *vaddr = obj->phys_handle->vaddr; | |
177 | struct sg_table *st; | |
178 | struct scatterlist *sg; | |
179 | int i; | |
00731155 | 180 | |
6a2c4232 CW |
181 | if (WARN_ON(i915_gem_object_needs_bit17_swizzle(obj))) |
182 | return -EINVAL; | |
183 | ||
184 | for (i = 0; i < obj->base.size / PAGE_SIZE; i++) { | |
185 | struct page *page; | |
186 | char *src; | |
187 | ||
188 | page = shmem_read_mapping_page(mapping, i); | |
189 | if (IS_ERR(page)) | |
190 | return PTR_ERR(page); | |
191 | ||
192 | src = kmap_atomic(page); | |
193 | memcpy(vaddr, src, PAGE_SIZE); | |
194 | drm_clflush_virt_range(vaddr, PAGE_SIZE); | |
195 | kunmap_atomic(src); | |
196 | ||
197 | page_cache_release(page); | |
198 | vaddr += PAGE_SIZE; | |
199 | } | |
200 | ||
201 | i915_gem_chipset_flush(obj->base.dev); | |
202 | ||
203 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
204 | if (st == NULL) | |
205 | return -ENOMEM; | |
206 | ||
207 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
208 | kfree(st); | |
209 | return -ENOMEM; | |
210 | } | |
211 | ||
212 | sg = st->sgl; | |
213 | sg->offset = 0; | |
214 | sg->length = obj->base.size; | |
00731155 | 215 | |
6a2c4232 CW |
216 | sg_dma_address(sg) = obj->phys_handle->busaddr; |
217 | sg_dma_len(sg) = obj->base.size; | |
218 | ||
219 | obj->pages = st; | |
6a2c4232 CW |
220 | return 0; |
221 | } | |
222 | ||
223 | static void | |
224 | i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj) | |
225 | { | |
226 | int ret; | |
227 | ||
228 | BUG_ON(obj->madv == __I915_MADV_PURGED); | |
00731155 | 229 | |
6a2c4232 CW |
230 | ret = i915_gem_object_set_to_cpu_domain(obj, true); |
231 | if (ret) { | |
232 | /* In the event of a disaster, abandon all caches and | |
233 | * hope for the best. | |
234 | */ | |
235 | WARN_ON(ret != -EIO); | |
236 | obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
237 | } | |
238 | ||
239 | if (obj->madv == I915_MADV_DONTNEED) | |
240 | obj->dirty = 0; | |
241 | ||
242 | if (obj->dirty) { | |
00731155 | 243 | struct address_space *mapping = file_inode(obj->base.filp)->i_mapping; |
6a2c4232 | 244 | char *vaddr = obj->phys_handle->vaddr; |
00731155 CW |
245 | int i; |
246 | ||
247 | for (i = 0; i < obj->base.size / PAGE_SIZE; i++) { | |
6a2c4232 CW |
248 | struct page *page; |
249 | char *dst; | |
250 | ||
251 | page = shmem_read_mapping_page(mapping, i); | |
252 | if (IS_ERR(page)) | |
253 | continue; | |
254 | ||
255 | dst = kmap_atomic(page); | |
256 | drm_clflush_virt_range(vaddr, PAGE_SIZE); | |
257 | memcpy(dst, vaddr, PAGE_SIZE); | |
258 | kunmap_atomic(dst); | |
259 | ||
260 | set_page_dirty(page); | |
261 | if (obj->madv == I915_MADV_WILLNEED) | |
00731155 | 262 | mark_page_accessed(page); |
6a2c4232 | 263 | page_cache_release(page); |
00731155 CW |
264 | vaddr += PAGE_SIZE; |
265 | } | |
6a2c4232 | 266 | obj->dirty = 0; |
00731155 CW |
267 | } |
268 | ||
6a2c4232 CW |
269 | sg_free_table(obj->pages); |
270 | kfree(obj->pages); | |
6a2c4232 CW |
271 | } |
272 | ||
273 | static void | |
274 | i915_gem_object_release_phys(struct drm_i915_gem_object *obj) | |
275 | { | |
276 | drm_pci_free(obj->base.dev, obj->phys_handle); | |
277 | } | |
278 | ||
279 | static const struct drm_i915_gem_object_ops i915_gem_phys_ops = { | |
280 | .get_pages = i915_gem_object_get_pages_phys, | |
281 | .put_pages = i915_gem_object_put_pages_phys, | |
282 | .release = i915_gem_object_release_phys, | |
283 | }; | |
284 | ||
285 | static int | |
286 | drop_pages(struct drm_i915_gem_object *obj) | |
287 | { | |
288 | struct i915_vma *vma, *next; | |
289 | int ret; | |
290 | ||
291 | drm_gem_object_reference(&obj->base); | |
292 | list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) | |
293 | if (i915_vma_unbind(vma)) | |
294 | break; | |
295 | ||
296 | ret = i915_gem_object_put_pages(obj); | |
297 | drm_gem_object_unreference(&obj->base); | |
298 | ||
299 | return ret; | |
00731155 CW |
300 | } |
301 | ||
302 | int | |
303 | i915_gem_object_attach_phys(struct drm_i915_gem_object *obj, | |
304 | int align) | |
305 | { | |
306 | drm_dma_handle_t *phys; | |
6a2c4232 | 307 | int ret; |
00731155 CW |
308 | |
309 | if (obj->phys_handle) { | |
310 | if ((unsigned long)obj->phys_handle->vaddr & (align -1)) | |
311 | return -EBUSY; | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | if (obj->madv != I915_MADV_WILLNEED) | |
317 | return -EFAULT; | |
318 | ||
319 | if (obj->base.filp == NULL) | |
320 | return -EINVAL; | |
321 | ||
6a2c4232 CW |
322 | ret = drop_pages(obj); |
323 | if (ret) | |
324 | return ret; | |
325 | ||
00731155 CW |
326 | /* create a new object */ |
327 | phys = drm_pci_alloc(obj->base.dev, obj->base.size, align); | |
328 | if (!phys) | |
329 | return -ENOMEM; | |
330 | ||
00731155 | 331 | obj->phys_handle = phys; |
6a2c4232 CW |
332 | obj->ops = &i915_gem_phys_ops; |
333 | ||
334 | return i915_gem_object_get_pages(obj); | |
00731155 CW |
335 | } |
336 | ||
337 | static int | |
338 | i915_gem_phys_pwrite(struct drm_i915_gem_object *obj, | |
339 | struct drm_i915_gem_pwrite *args, | |
340 | struct drm_file *file_priv) | |
341 | { | |
342 | struct drm_device *dev = obj->base.dev; | |
343 | void *vaddr = obj->phys_handle->vaddr + args->offset; | |
344 | char __user *user_data = to_user_ptr(args->data_ptr); | |
063e4e6b | 345 | int ret = 0; |
6a2c4232 CW |
346 | |
347 | /* We manually control the domain here and pretend that it | |
348 | * remains coherent i.e. in the GTT domain, like shmem_pwrite. | |
349 | */ | |
350 | ret = i915_gem_object_wait_rendering(obj, false); | |
351 | if (ret) | |
352 | return ret; | |
00731155 | 353 | |
77a0d1ca | 354 | intel_fb_obj_invalidate(obj, ORIGIN_CPU); |
00731155 CW |
355 | if (__copy_from_user_inatomic_nocache(vaddr, user_data, args->size)) { |
356 | unsigned long unwritten; | |
357 | ||
358 | /* The physical object once assigned is fixed for the lifetime | |
359 | * of the obj, so we can safely drop the lock and continue | |
360 | * to access vaddr. | |
361 | */ | |
362 | mutex_unlock(&dev->struct_mutex); | |
363 | unwritten = copy_from_user(vaddr, user_data, args->size); | |
364 | mutex_lock(&dev->struct_mutex); | |
063e4e6b PZ |
365 | if (unwritten) { |
366 | ret = -EFAULT; | |
367 | goto out; | |
368 | } | |
00731155 CW |
369 | } |
370 | ||
6a2c4232 | 371 | drm_clflush_virt_range(vaddr, args->size); |
00731155 | 372 | i915_gem_chipset_flush(dev); |
063e4e6b PZ |
373 | |
374 | out: | |
de152b62 | 375 | intel_fb_obj_flush(obj, false, ORIGIN_CPU); |
063e4e6b | 376 | return ret; |
00731155 CW |
377 | } |
378 | ||
42dcedd4 CW |
379 | void *i915_gem_object_alloc(struct drm_device *dev) |
380 | { | |
381 | struct drm_i915_private *dev_priv = dev->dev_private; | |
efab6d8d | 382 | return kmem_cache_zalloc(dev_priv->objects, GFP_KERNEL); |
42dcedd4 CW |
383 | } |
384 | ||
385 | void i915_gem_object_free(struct drm_i915_gem_object *obj) | |
386 | { | |
387 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
efab6d8d | 388 | kmem_cache_free(dev_priv->objects, obj); |
42dcedd4 CW |
389 | } |
390 | ||
ff72145b DA |
391 | static int |
392 | i915_gem_create(struct drm_file *file, | |
393 | struct drm_device *dev, | |
394 | uint64_t size, | |
395 | uint32_t *handle_p) | |
673a394b | 396 | { |
05394f39 | 397 | struct drm_i915_gem_object *obj; |
a1a2d1d3 PP |
398 | int ret; |
399 | u32 handle; | |
673a394b | 400 | |
ff72145b | 401 | size = roundup(size, PAGE_SIZE); |
8ffc0246 CW |
402 | if (size == 0) |
403 | return -EINVAL; | |
673a394b EA |
404 | |
405 | /* Allocate the new object */ | |
ff72145b | 406 | obj = i915_gem_alloc_object(dev, size); |
673a394b EA |
407 | if (obj == NULL) |
408 | return -ENOMEM; | |
409 | ||
05394f39 | 410 | ret = drm_gem_handle_create(file, &obj->base, &handle); |
202f2fef | 411 | /* drop reference from allocate - handle holds it now */ |
d861e338 DV |
412 | drm_gem_object_unreference_unlocked(&obj->base); |
413 | if (ret) | |
414 | return ret; | |
202f2fef | 415 | |
ff72145b | 416 | *handle_p = handle; |
673a394b EA |
417 | return 0; |
418 | } | |
419 | ||
ff72145b DA |
420 | int |
421 | i915_gem_dumb_create(struct drm_file *file, | |
422 | struct drm_device *dev, | |
423 | struct drm_mode_create_dumb *args) | |
424 | { | |
425 | /* have to work out size/pitch and return them */ | |
de45eaf7 | 426 | args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 64); |
ff72145b DA |
427 | args->size = args->pitch * args->height; |
428 | return i915_gem_create(file, dev, | |
da6b51d0 | 429 | args->size, &args->handle); |
ff72145b DA |
430 | } |
431 | ||
ff72145b DA |
432 | /** |
433 | * Creates a new mm object and returns a handle to it. | |
434 | */ | |
435 | int | |
436 | i915_gem_create_ioctl(struct drm_device *dev, void *data, | |
437 | struct drm_file *file) | |
438 | { | |
439 | struct drm_i915_gem_create *args = data; | |
63ed2cb2 | 440 | |
ff72145b | 441 | return i915_gem_create(file, dev, |
da6b51d0 | 442 | args->size, &args->handle); |
ff72145b DA |
443 | } |
444 | ||
8461d226 DV |
445 | static inline int |
446 | __copy_to_user_swizzled(char __user *cpu_vaddr, | |
447 | const char *gpu_vaddr, int gpu_offset, | |
448 | int length) | |
449 | { | |
450 | int ret, cpu_offset = 0; | |
451 | ||
452 | while (length > 0) { | |
453 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
454 | int this_length = min(cacheline_end - gpu_offset, length); | |
455 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
456 | ||
457 | ret = __copy_to_user(cpu_vaddr + cpu_offset, | |
458 | gpu_vaddr + swizzled_gpu_offset, | |
459 | this_length); | |
460 | if (ret) | |
461 | return ret + length; | |
462 | ||
463 | cpu_offset += this_length; | |
464 | gpu_offset += this_length; | |
465 | length -= this_length; | |
466 | } | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
8c59967c | 471 | static inline int |
4f0c7cfb BW |
472 | __copy_from_user_swizzled(char *gpu_vaddr, int gpu_offset, |
473 | const char __user *cpu_vaddr, | |
8c59967c DV |
474 | int length) |
475 | { | |
476 | int ret, cpu_offset = 0; | |
477 | ||
478 | while (length > 0) { | |
479 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
480 | int this_length = min(cacheline_end - gpu_offset, length); | |
481 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
482 | ||
483 | ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset, | |
484 | cpu_vaddr + cpu_offset, | |
485 | this_length); | |
486 | if (ret) | |
487 | return ret + length; | |
488 | ||
489 | cpu_offset += this_length; | |
490 | gpu_offset += this_length; | |
491 | length -= this_length; | |
492 | } | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
4c914c0c BV |
497 | /* |
498 | * Pins the specified object's pages and synchronizes the object with | |
499 | * GPU accesses. Sets needs_clflush to non-zero if the caller should | |
500 | * flush the object from the CPU cache. | |
501 | */ | |
502 | int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object *obj, | |
503 | int *needs_clflush) | |
504 | { | |
505 | int ret; | |
506 | ||
507 | *needs_clflush = 0; | |
508 | ||
509 | if (!obj->base.filp) | |
510 | return -EINVAL; | |
511 | ||
512 | if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) { | |
513 | /* If we're not in the cpu read domain, set ourself into the gtt | |
514 | * read domain and manually flush cachelines (if required). This | |
515 | * optimizes for the case when the gpu will dirty the data | |
516 | * anyway again before the next pread happens. */ | |
517 | *needs_clflush = !cpu_cache_is_coherent(obj->base.dev, | |
518 | obj->cache_level); | |
519 | ret = i915_gem_object_wait_rendering(obj, true); | |
520 | if (ret) | |
521 | return ret; | |
522 | } | |
523 | ||
524 | ret = i915_gem_object_get_pages(obj); | |
525 | if (ret) | |
526 | return ret; | |
527 | ||
528 | i915_gem_object_pin_pages(obj); | |
529 | ||
530 | return ret; | |
531 | } | |
532 | ||
d174bd64 DV |
533 | /* Per-page copy function for the shmem pread fastpath. |
534 | * Flushes invalid cachelines before reading the target if | |
535 | * needs_clflush is set. */ | |
eb01459f | 536 | static int |
d174bd64 DV |
537 | shmem_pread_fast(struct page *page, int shmem_page_offset, int page_length, |
538 | char __user *user_data, | |
539 | bool page_do_bit17_swizzling, bool needs_clflush) | |
540 | { | |
541 | char *vaddr; | |
542 | int ret; | |
543 | ||
e7e58eb5 | 544 | if (unlikely(page_do_bit17_swizzling)) |
d174bd64 DV |
545 | return -EINVAL; |
546 | ||
547 | vaddr = kmap_atomic(page); | |
548 | if (needs_clflush) | |
549 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
550 | page_length); | |
551 | ret = __copy_to_user_inatomic(user_data, | |
552 | vaddr + shmem_page_offset, | |
553 | page_length); | |
554 | kunmap_atomic(vaddr); | |
555 | ||
f60d7f0c | 556 | return ret ? -EFAULT : 0; |
d174bd64 DV |
557 | } |
558 | ||
23c18c71 DV |
559 | static void |
560 | shmem_clflush_swizzled_range(char *addr, unsigned long length, | |
561 | bool swizzled) | |
562 | { | |
e7e58eb5 | 563 | if (unlikely(swizzled)) { |
23c18c71 DV |
564 | unsigned long start = (unsigned long) addr; |
565 | unsigned long end = (unsigned long) addr + length; | |
566 | ||
567 | /* For swizzling simply ensure that we always flush both | |
568 | * channels. Lame, but simple and it works. Swizzled | |
569 | * pwrite/pread is far from a hotpath - current userspace | |
570 | * doesn't use it at all. */ | |
571 | start = round_down(start, 128); | |
572 | end = round_up(end, 128); | |
573 | ||
574 | drm_clflush_virt_range((void *)start, end - start); | |
575 | } else { | |
576 | drm_clflush_virt_range(addr, length); | |
577 | } | |
578 | ||
579 | } | |
580 | ||
d174bd64 DV |
581 | /* Only difference to the fast-path function is that this can handle bit17 |
582 | * and uses non-atomic copy and kmap functions. */ | |
583 | static int | |
584 | shmem_pread_slow(struct page *page, int shmem_page_offset, int page_length, | |
585 | char __user *user_data, | |
586 | bool page_do_bit17_swizzling, bool needs_clflush) | |
587 | { | |
588 | char *vaddr; | |
589 | int ret; | |
590 | ||
591 | vaddr = kmap(page); | |
592 | if (needs_clflush) | |
23c18c71 DV |
593 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
594 | page_length, | |
595 | page_do_bit17_swizzling); | |
d174bd64 DV |
596 | |
597 | if (page_do_bit17_swizzling) | |
598 | ret = __copy_to_user_swizzled(user_data, | |
599 | vaddr, shmem_page_offset, | |
600 | page_length); | |
601 | else | |
602 | ret = __copy_to_user(user_data, | |
603 | vaddr + shmem_page_offset, | |
604 | page_length); | |
605 | kunmap(page); | |
606 | ||
f60d7f0c | 607 | return ret ? - EFAULT : 0; |
d174bd64 DV |
608 | } |
609 | ||
eb01459f | 610 | static int |
dbf7bff0 DV |
611 | i915_gem_shmem_pread(struct drm_device *dev, |
612 | struct drm_i915_gem_object *obj, | |
613 | struct drm_i915_gem_pread *args, | |
614 | struct drm_file *file) | |
eb01459f | 615 | { |
8461d226 | 616 | char __user *user_data; |
eb01459f | 617 | ssize_t remain; |
8461d226 | 618 | loff_t offset; |
eb2c0c81 | 619 | int shmem_page_offset, page_length, ret = 0; |
8461d226 | 620 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
96d79b52 | 621 | int prefaulted = 0; |
8489731c | 622 | int needs_clflush = 0; |
67d5a50c | 623 | struct sg_page_iter sg_iter; |
eb01459f | 624 | |
2bb4629a | 625 | user_data = to_user_ptr(args->data_ptr); |
eb01459f EA |
626 | remain = args->size; |
627 | ||
8461d226 | 628 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
eb01459f | 629 | |
4c914c0c | 630 | ret = i915_gem_obj_prepare_shmem_read(obj, &needs_clflush); |
f60d7f0c CW |
631 | if (ret) |
632 | return ret; | |
633 | ||
8461d226 | 634 | offset = args->offset; |
eb01459f | 635 | |
67d5a50c ID |
636 | for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, |
637 | offset >> PAGE_SHIFT) { | |
2db76d7c | 638 | struct page *page = sg_page_iter_page(&sg_iter); |
9da3da66 CW |
639 | |
640 | if (remain <= 0) | |
641 | break; | |
642 | ||
eb01459f EA |
643 | /* Operation in this page |
644 | * | |
eb01459f | 645 | * shmem_page_offset = offset within page in shmem file |
eb01459f EA |
646 | * page_length = bytes to copy for this page |
647 | */ | |
c8cbbb8b | 648 | shmem_page_offset = offset_in_page(offset); |
eb01459f EA |
649 | page_length = remain; |
650 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
651 | page_length = PAGE_SIZE - shmem_page_offset; | |
eb01459f | 652 | |
8461d226 DV |
653 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
654 | (page_to_phys(page) & (1 << 17)) != 0; | |
655 | ||
d174bd64 DV |
656 | ret = shmem_pread_fast(page, shmem_page_offset, page_length, |
657 | user_data, page_do_bit17_swizzling, | |
658 | needs_clflush); | |
659 | if (ret == 0) | |
660 | goto next_page; | |
dbf7bff0 | 661 | |
dbf7bff0 DV |
662 | mutex_unlock(&dev->struct_mutex); |
663 | ||
d330a953 | 664 | if (likely(!i915.prefault_disable) && !prefaulted) { |
f56f821f | 665 | ret = fault_in_multipages_writeable(user_data, remain); |
96d79b52 DV |
666 | /* Userspace is tricking us, but we've already clobbered |
667 | * its pages with the prefault and promised to write the | |
668 | * data up to the first fault. Hence ignore any errors | |
669 | * and just continue. */ | |
670 | (void)ret; | |
671 | prefaulted = 1; | |
672 | } | |
eb01459f | 673 | |
d174bd64 DV |
674 | ret = shmem_pread_slow(page, shmem_page_offset, page_length, |
675 | user_data, page_do_bit17_swizzling, | |
676 | needs_clflush); | |
eb01459f | 677 | |
dbf7bff0 | 678 | mutex_lock(&dev->struct_mutex); |
f60d7f0c | 679 | |
f60d7f0c | 680 | if (ret) |
8461d226 | 681 | goto out; |
8461d226 | 682 | |
17793c9a | 683 | next_page: |
eb01459f | 684 | remain -= page_length; |
8461d226 | 685 | user_data += page_length; |
eb01459f EA |
686 | offset += page_length; |
687 | } | |
688 | ||
4f27b75d | 689 | out: |
f60d7f0c CW |
690 | i915_gem_object_unpin_pages(obj); |
691 | ||
eb01459f EA |
692 | return ret; |
693 | } | |
694 | ||
673a394b EA |
695 | /** |
696 | * Reads data from the object referenced by handle. | |
697 | * | |
698 | * On error, the contents of *data are undefined. | |
699 | */ | |
700 | int | |
701 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 702 | struct drm_file *file) |
673a394b EA |
703 | { |
704 | struct drm_i915_gem_pread *args = data; | |
05394f39 | 705 | struct drm_i915_gem_object *obj; |
35b62a89 | 706 | int ret = 0; |
673a394b | 707 | |
51311d0a CW |
708 | if (args->size == 0) |
709 | return 0; | |
710 | ||
711 | if (!access_ok(VERIFY_WRITE, | |
2bb4629a | 712 | to_user_ptr(args->data_ptr), |
51311d0a CW |
713 | args->size)) |
714 | return -EFAULT; | |
715 | ||
4f27b75d | 716 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 717 | if (ret) |
4f27b75d | 718 | return ret; |
673a394b | 719 | |
05394f39 | 720 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 721 | if (&obj->base == NULL) { |
1d7cfea1 CW |
722 | ret = -ENOENT; |
723 | goto unlock; | |
4f27b75d | 724 | } |
673a394b | 725 | |
7dcd2499 | 726 | /* Bounds check source. */ |
05394f39 CW |
727 | if (args->offset > obj->base.size || |
728 | args->size > obj->base.size - args->offset) { | |
ce9d419d | 729 | ret = -EINVAL; |
35b62a89 | 730 | goto out; |
ce9d419d CW |
731 | } |
732 | ||
1286ff73 DV |
733 | /* prime objects have no backing filp to GEM pread/pwrite |
734 | * pages from. | |
735 | */ | |
736 | if (!obj->base.filp) { | |
737 | ret = -EINVAL; | |
738 | goto out; | |
739 | } | |
740 | ||
db53a302 CW |
741 | trace_i915_gem_object_pread(obj, args->offset, args->size); |
742 | ||
dbf7bff0 | 743 | ret = i915_gem_shmem_pread(dev, obj, args, file); |
673a394b | 744 | |
35b62a89 | 745 | out: |
05394f39 | 746 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 747 | unlock: |
4f27b75d | 748 | mutex_unlock(&dev->struct_mutex); |
eb01459f | 749 | return ret; |
673a394b EA |
750 | } |
751 | ||
0839ccb8 KP |
752 | /* This is the fast write path which cannot handle |
753 | * page faults in the source data | |
9b7530cc | 754 | */ |
0839ccb8 KP |
755 | |
756 | static inline int | |
757 | fast_user_write(struct io_mapping *mapping, | |
758 | loff_t page_base, int page_offset, | |
759 | char __user *user_data, | |
760 | int length) | |
9b7530cc | 761 | { |
4f0c7cfb BW |
762 | void __iomem *vaddr_atomic; |
763 | void *vaddr; | |
0839ccb8 | 764 | unsigned long unwritten; |
9b7530cc | 765 | |
3e4d3af5 | 766 | vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base); |
4f0c7cfb BW |
767 | /* We can use the cpu mem copy function because this is X86. */ |
768 | vaddr = (void __force*)vaddr_atomic + page_offset; | |
769 | unwritten = __copy_from_user_inatomic_nocache(vaddr, | |
0839ccb8 | 770 | user_data, length); |
3e4d3af5 | 771 | io_mapping_unmap_atomic(vaddr_atomic); |
fbd5a26d | 772 | return unwritten; |
0839ccb8 KP |
773 | } |
774 | ||
3de09aa3 EA |
775 | /** |
776 | * This is the fast pwrite path, where we copy the data directly from the | |
777 | * user into the GTT, uncached. | |
778 | */ | |
673a394b | 779 | static int |
05394f39 CW |
780 | i915_gem_gtt_pwrite_fast(struct drm_device *dev, |
781 | struct drm_i915_gem_object *obj, | |
3de09aa3 | 782 | struct drm_i915_gem_pwrite *args, |
05394f39 | 783 | struct drm_file *file) |
673a394b | 784 | { |
3e31c6c0 | 785 | struct drm_i915_private *dev_priv = dev->dev_private; |
673a394b | 786 | ssize_t remain; |
0839ccb8 | 787 | loff_t offset, page_base; |
673a394b | 788 | char __user *user_data; |
935aaa69 DV |
789 | int page_offset, page_length, ret; |
790 | ||
1ec9e26d | 791 | ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE | PIN_NONBLOCK); |
935aaa69 DV |
792 | if (ret) |
793 | goto out; | |
794 | ||
795 | ret = i915_gem_object_set_to_gtt_domain(obj, true); | |
796 | if (ret) | |
797 | goto out_unpin; | |
798 | ||
799 | ret = i915_gem_object_put_fence(obj); | |
800 | if (ret) | |
801 | goto out_unpin; | |
673a394b | 802 | |
2bb4629a | 803 | user_data = to_user_ptr(args->data_ptr); |
673a394b | 804 | remain = args->size; |
673a394b | 805 | |
f343c5f6 | 806 | offset = i915_gem_obj_ggtt_offset(obj) + args->offset; |
673a394b | 807 | |
77a0d1ca | 808 | intel_fb_obj_invalidate(obj, ORIGIN_GTT); |
063e4e6b | 809 | |
673a394b EA |
810 | while (remain > 0) { |
811 | /* Operation in this page | |
812 | * | |
0839ccb8 KP |
813 | * page_base = page offset within aperture |
814 | * page_offset = offset within page | |
815 | * page_length = bytes to copy for this page | |
673a394b | 816 | */ |
c8cbbb8b CW |
817 | page_base = offset & PAGE_MASK; |
818 | page_offset = offset_in_page(offset); | |
0839ccb8 KP |
819 | page_length = remain; |
820 | if ((page_offset + remain) > PAGE_SIZE) | |
821 | page_length = PAGE_SIZE - page_offset; | |
822 | ||
0839ccb8 | 823 | /* If we get a fault while copying data, then (presumably) our |
3de09aa3 EA |
824 | * source page isn't available. Return the error and we'll |
825 | * retry in the slow path. | |
0839ccb8 | 826 | */ |
5d4545ae | 827 | if (fast_user_write(dev_priv->gtt.mappable, page_base, |
935aaa69 DV |
828 | page_offset, user_data, page_length)) { |
829 | ret = -EFAULT; | |
063e4e6b | 830 | goto out_flush; |
935aaa69 | 831 | } |
673a394b | 832 | |
0839ccb8 KP |
833 | remain -= page_length; |
834 | user_data += page_length; | |
835 | offset += page_length; | |
673a394b | 836 | } |
673a394b | 837 | |
063e4e6b | 838 | out_flush: |
de152b62 | 839 | intel_fb_obj_flush(obj, false, ORIGIN_GTT); |
935aaa69 | 840 | out_unpin: |
d7f46fc4 | 841 | i915_gem_object_ggtt_unpin(obj); |
935aaa69 | 842 | out: |
3de09aa3 | 843 | return ret; |
673a394b EA |
844 | } |
845 | ||
d174bd64 DV |
846 | /* Per-page copy function for the shmem pwrite fastpath. |
847 | * Flushes invalid cachelines before writing to the target if | |
848 | * needs_clflush_before is set and flushes out any written cachelines after | |
849 | * writing if needs_clflush is set. */ | |
3043c60c | 850 | static int |
d174bd64 DV |
851 | shmem_pwrite_fast(struct page *page, int shmem_page_offset, int page_length, |
852 | char __user *user_data, | |
853 | bool page_do_bit17_swizzling, | |
854 | bool needs_clflush_before, | |
855 | bool needs_clflush_after) | |
673a394b | 856 | { |
d174bd64 | 857 | char *vaddr; |
673a394b | 858 | int ret; |
3de09aa3 | 859 | |
e7e58eb5 | 860 | if (unlikely(page_do_bit17_swizzling)) |
d174bd64 | 861 | return -EINVAL; |
3de09aa3 | 862 | |
d174bd64 DV |
863 | vaddr = kmap_atomic(page); |
864 | if (needs_clflush_before) | |
865 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
866 | page_length); | |
c2831a94 CW |
867 | ret = __copy_from_user_inatomic(vaddr + shmem_page_offset, |
868 | user_data, page_length); | |
d174bd64 DV |
869 | if (needs_clflush_after) |
870 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
871 | page_length); | |
872 | kunmap_atomic(vaddr); | |
3de09aa3 | 873 | |
755d2218 | 874 | return ret ? -EFAULT : 0; |
3de09aa3 EA |
875 | } |
876 | ||
d174bd64 DV |
877 | /* Only difference to the fast-path function is that this can handle bit17 |
878 | * and uses non-atomic copy and kmap functions. */ | |
3043c60c | 879 | static int |
d174bd64 DV |
880 | shmem_pwrite_slow(struct page *page, int shmem_page_offset, int page_length, |
881 | char __user *user_data, | |
882 | bool page_do_bit17_swizzling, | |
883 | bool needs_clflush_before, | |
884 | bool needs_clflush_after) | |
673a394b | 885 | { |
d174bd64 DV |
886 | char *vaddr; |
887 | int ret; | |
e5281ccd | 888 | |
d174bd64 | 889 | vaddr = kmap(page); |
e7e58eb5 | 890 | if (unlikely(needs_clflush_before || page_do_bit17_swizzling)) |
23c18c71 DV |
891 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
892 | page_length, | |
893 | page_do_bit17_swizzling); | |
d174bd64 DV |
894 | if (page_do_bit17_swizzling) |
895 | ret = __copy_from_user_swizzled(vaddr, shmem_page_offset, | |
e5281ccd CW |
896 | user_data, |
897 | page_length); | |
d174bd64 DV |
898 | else |
899 | ret = __copy_from_user(vaddr + shmem_page_offset, | |
900 | user_data, | |
901 | page_length); | |
902 | if (needs_clflush_after) | |
23c18c71 DV |
903 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
904 | page_length, | |
905 | page_do_bit17_swizzling); | |
d174bd64 | 906 | kunmap(page); |
40123c1f | 907 | |
755d2218 | 908 | return ret ? -EFAULT : 0; |
40123c1f EA |
909 | } |
910 | ||
40123c1f | 911 | static int |
e244a443 DV |
912 | i915_gem_shmem_pwrite(struct drm_device *dev, |
913 | struct drm_i915_gem_object *obj, | |
914 | struct drm_i915_gem_pwrite *args, | |
915 | struct drm_file *file) | |
40123c1f | 916 | { |
40123c1f | 917 | ssize_t remain; |
8c59967c DV |
918 | loff_t offset; |
919 | char __user *user_data; | |
eb2c0c81 | 920 | int shmem_page_offset, page_length, ret = 0; |
8c59967c | 921 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
e244a443 | 922 | int hit_slowpath = 0; |
58642885 DV |
923 | int needs_clflush_after = 0; |
924 | int needs_clflush_before = 0; | |
67d5a50c | 925 | struct sg_page_iter sg_iter; |
40123c1f | 926 | |
2bb4629a | 927 | user_data = to_user_ptr(args->data_ptr); |
40123c1f EA |
928 | remain = args->size; |
929 | ||
8c59967c | 930 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
40123c1f | 931 | |
58642885 DV |
932 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
933 | /* If we're not in the cpu write domain, set ourself into the gtt | |
934 | * write domain and manually flush cachelines (if required). This | |
935 | * optimizes for the case when the gpu will use the data | |
936 | * right away and we therefore have to clflush anyway. */ | |
2c22569b | 937 | needs_clflush_after = cpu_write_needs_clflush(obj); |
23f54483 BW |
938 | ret = i915_gem_object_wait_rendering(obj, false); |
939 | if (ret) | |
940 | return ret; | |
58642885 | 941 | } |
c76ce038 CW |
942 | /* Same trick applies to invalidate partially written cachelines read |
943 | * before writing. */ | |
944 | if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) | |
945 | needs_clflush_before = | |
946 | !cpu_cache_is_coherent(dev, obj->cache_level); | |
58642885 | 947 | |
755d2218 CW |
948 | ret = i915_gem_object_get_pages(obj); |
949 | if (ret) | |
950 | return ret; | |
951 | ||
77a0d1ca | 952 | intel_fb_obj_invalidate(obj, ORIGIN_CPU); |
063e4e6b | 953 | |
755d2218 CW |
954 | i915_gem_object_pin_pages(obj); |
955 | ||
673a394b | 956 | offset = args->offset; |
05394f39 | 957 | obj->dirty = 1; |
673a394b | 958 | |
67d5a50c ID |
959 | for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, |
960 | offset >> PAGE_SHIFT) { | |
2db76d7c | 961 | struct page *page = sg_page_iter_page(&sg_iter); |
58642885 | 962 | int partial_cacheline_write; |
e5281ccd | 963 | |
9da3da66 CW |
964 | if (remain <= 0) |
965 | break; | |
966 | ||
40123c1f EA |
967 | /* Operation in this page |
968 | * | |
40123c1f | 969 | * shmem_page_offset = offset within page in shmem file |
40123c1f EA |
970 | * page_length = bytes to copy for this page |
971 | */ | |
c8cbbb8b | 972 | shmem_page_offset = offset_in_page(offset); |
40123c1f EA |
973 | |
974 | page_length = remain; | |
975 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
976 | page_length = PAGE_SIZE - shmem_page_offset; | |
40123c1f | 977 | |
58642885 DV |
978 | /* If we don't overwrite a cacheline completely we need to be |
979 | * careful to have up-to-date data by first clflushing. Don't | |
980 | * overcomplicate things and flush the entire patch. */ | |
981 | partial_cacheline_write = needs_clflush_before && | |
982 | ((shmem_page_offset | page_length) | |
983 | & (boot_cpu_data.x86_clflush_size - 1)); | |
984 | ||
8c59967c DV |
985 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
986 | (page_to_phys(page) & (1 << 17)) != 0; | |
987 | ||
d174bd64 DV |
988 | ret = shmem_pwrite_fast(page, shmem_page_offset, page_length, |
989 | user_data, page_do_bit17_swizzling, | |
990 | partial_cacheline_write, | |
991 | needs_clflush_after); | |
992 | if (ret == 0) | |
993 | goto next_page; | |
e244a443 DV |
994 | |
995 | hit_slowpath = 1; | |
e244a443 | 996 | mutex_unlock(&dev->struct_mutex); |
d174bd64 DV |
997 | ret = shmem_pwrite_slow(page, shmem_page_offset, page_length, |
998 | user_data, page_do_bit17_swizzling, | |
999 | partial_cacheline_write, | |
1000 | needs_clflush_after); | |
40123c1f | 1001 | |
e244a443 | 1002 | mutex_lock(&dev->struct_mutex); |
755d2218 | 1003 | |
755d2218 | 1004 | if (ret) |
8c59967c | 1005 | goto out; |
8c59967c | 1006 | |
17793c9a | 1007 | next_page: |
40123c1f | 1008 | remain -= page_length; |
8c59967c | 1009 | user_data += page_length; |
40123c1f | 1010 | offset += page_length; |
673a394b EA |
1011 | } |
1012 | ||
fbd5a26d | 1013 | out: |
755d2218 CW |
1014 | i915_gem_object_unpin_pages(obj); |
1015 | ||
e244a443 | 1016 | if (hit_slowpath) { |
8dcf015e DV |
1017 | /* |
1018 | * Fixup: Flush cpu caches in case we didn't flush the dirty | |
1019 | * cachelines in-line while writing and the object moved | |
1020 | * out of the cpu write domain while we've dropped the lock. | |
1021 | */ | |
1022 | if (!needs_clflush_after && | |
1023 | obj->base.write_domain != I915_GEM_DOMAIN_CPU) { | |
000433b6 CW |
1024 | if (i915_gem_clflush_object(obj, obj->pin_display)) |
1025 | i915_gem_chipset_flush(dev); | |
e244a443 | 1026 | } |
8c59967c | 1027 | } |
673a394b | 1028 | |
58642885 | 1029 | if (needs_clflush_after) |
e76e9aeb | 1030 | i915_gem_chipset_flush(dev); |
58642885 | 1031 | |
de152b62 | 1032 | intel_fb_obj_flush(obj, false, ORIGIN_CPU); |
40123c1f | 1033 | return ret; |
673a394b EA |
1034 | } |
1035 | ||
1036 | /** | |
1037 | * Writes data to the object referenced by handle. | |
1038 | * | |
1039 | * On error, the contents of the buffer that were to be modified are undefined. | |
1040 | */ | |
1041 | int | |
1042 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, | |
fbd5a26d | 1043 | struct drm_file *file) |
673a394b | 1044 | { |
5d77d9c5 | 1045 | struct drm_i915_private *dev_priv = dev->dev_private; |
673a394b | 1046 | struct drm_i915_gem_pwrite *args = data; |
05394f39 | 1047 | struct drm_i915_gem_object *obj; |
51311d0a CW |
1048 | int ret; |
1049 | ||
1050 | if (args->size == 0) | |
1051 | return 0; | |
1052 | ||
1053 | if (!access_ok(VERIFY_READ, | |
2bb4629a | 1054 | to_user_ptr(args->data_ptr), |
51311d0a CW |
1055 | args->size)) |
1056 | return -EFAULT; | |
1057 | ||
d330a953 | 1058 | if (likely(!i915.prefault_disable)) { |
0b74b508 XZ |
1059 | ret = fault_in_multipages_readable(to_user_ptr(args->data_ptr), |
1060 | args->size); | |
1061 | if (ret) | |
1062 | return -EFAULT; | |
1063 | } | |
673a394b | 1064 | |
5d77d9c5 ID |
1065 | intel_runtime_pm_get(dev_priv); |
1066 | ||
fbd5a26d | 1067 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1068 | if (ret) |
5d77d9c5 | 1069 | goto put_rpm; |
1d7cfea1 | 1070 | |
05394f39 | 1071 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 1072 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1073 | ret = -ENOENT; |
1074 | goto unlock; | |
fbd5a26d | 1075 | } |
673a394b | 1076 | |
7dcd2499 | 1077 | /* Bounds check destination. */ |
05394f39 CW |
1078 | if (args->offset > obj->base.size || |
1079 | args->size > obj->base.size - args->offset) { | |
ce9d419d | 1080 | ret = -EINVAL; |
35b62a89 | 1081 | goto out; |
ce9d419d CW |
1082 | } |
1083 | ||
1286ff73 DV |
1084 | /* prime objects have no backing filp to GEM pread/pwrite |
1085 | * pages from. | |
1086 | */ | |
1087 | if (!obj->base.filp) { | |
1088 | ret = -EINVAL; | |
1089 | goto out; | |
1090 | } | |
1091 | ||
db53a302 CW |
1092 | trace_i915_gem_object_pwrite(obj, args->offset, args->size); |
1093 | ||
935aaa69 | 1094 | ret = -EFAULT; |
673a394b EA |
1095 | /* We can only do the GTT pwrite on untiled buffers, as otherwise |
1096 | * it would end up going through the fenced access, and we'll get | |
1097 | * different detiling behavior between reading and writing. | |
1098 | * pread/pwrite currently are reading and writing from the CPU | |
1099 | * perspective, requiring manual detiling by the client. | |
1100 | */ | |
2c22569b CW |
1101 | if (obj->tiling_mode == I915_TILING_NONE && |
1102 | obj->base.write_domain != I915_GEM_DOMAIN_CPU && | |
1103 | cpu_write_needs_clflush(obj)) { | |
fbd5a26d | 1104 | ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file); |
935aaa69 DV |
1105 | /* Note that the gtt paths might fail with non-page-backed user |
1106 | * pointers (e.g. gtt mappings when moving data between | |
1107 | * textures). Fallback to the shmem path in that case. */ | |
fbd5a26d | 1108 | } |
673a394b | 1109 | |
6a2c4232 CW |
1110 | if (ret == -EFAULT || ret == -ENOSPC) { |
1111 | if (obj->phys_handle) | |
1112 | ret = i915_gem_phys_pwrite(obj, args, file); | |
1113 | else | |
1114 | ret = i915_gem_shmem_pwrite(dev, obj, args, file); | |
1115 | } | |
5c0480f2 | 1116 | |
35b62a89 | 1117 | out: |
05394f39 | 1118 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1119 | unlock: |
fbd5a26d | 1120 | mutex_unlock(&dev->struct_mutex); |
5d77d9c5 ID |
1121 | put_rpm: |
1122 | intel_runtime_pm_put(dev_priv); | |
1123 | ||
673a394b EA |
1124 | return ret; |
1125 | } | |
1126 | ||
b361237b | 1127 | int |
33196ded | 1128 | i915_gem_check_wedge(struct i915_gpu_error *error, |
b361237b CW |
1129 | bool interruptible) |
1130 | { | |
1f83fee0 | 1131 | if (i915_reset_in_progress(error)) { |
b361237b CW |
1132 | /* Non-interruptible callers can't handle -EAGAIN, hence return |
1133 | * -EIO unconditionally for these. */ | |
1134 | if (!interruptible) | |
1135 | return -EIO; | |
1136 | ||
1f83fee0 DV |
1137 | /* Recovery complete, but the reset failed ... */ |
1138 | if (i915_terminally_wedged(error)) | |
b361237b CW |
1139 | return -EIO; |
1140 | ||
6689c167 MA |
1141 | /* |
1142 | * Check if GPU Reset is in progress - we need intel_ring_begin | |
1143 | * to work properly to reinit the hw state while the gpu is | |
1144 | * still marked as reset-in-progress. Handle this with a flag. | |
1145 | */ | |
1146 | if (!error->reload_in_reset) | |
1147 | return -EAGAIN; | |
b361237b CW |
1148 | } |
1149 | ||
1150 | return 0; | |
1151 | } | |
1152 | ||
094f9a54 CW |
1153 | static void fake_irq(unsigned long data) |
1154 | { | |
1155 | wake_up_process((struct task_struct *)data); | |
1156 | } | |
1157 | ||
1158 | static bool missed_irq(struct drm_i915_private *dev_priv, | |
a4872ba6 | 1159 | struct intel_engine_cs *ring) |
094f9a54 CW |
1160 | { |
1161 | return test_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings); | |
1162 | } | |
1163 | ||
eed29a5b | 1164 | static int __i915_spin_request(struct drm_i915_gem_request *req) |
b29c19b6 | 1165 | { |
2def4ad9 CW |
1166 | unsigned long timeout; |
1167 | ||
eed29a5b | 1168 | if (i915_gem_request_get_ring(req)->irq_refcount) |
2def4ad9 CW |
1169 | return -EBUSY; |
1170 | ||
1171 | timeout = jiffies + 1; | |
1172 | while (!need_resched()) { | |
eed29a5b | 1173 | if (i915_gem_request_completed(req, true)) |
2def4ad9 CW |
1174 | return 0; |
1175 | ||
1176 | if (time_after_eq(jiffies, timeout)) | |
1177 | break; | |
b29c19b6 | 1178 | |
2def4ad9 CW |
1179 | cpu_relax_lowlatency(); |
1180 | } | |
eed29a5b | 1181 | if (i915_gem_request_completed(req, false)) |
2def4ad9 CW |
1182 | return 0; |
1183 | ||
1184 | return -EAGAIN; | |
b29c19b6 CW |
1185 | } |
1186 | ||
b361237b | 1187 | /** |
9c654818 JH |
1188 | * __i915_wait_request - wait until execution of request has finished |
1189 | * @req: duh! | |
1190 | * @reset_counter: reset sequence associated with the given request | |
b361237b CW |
1191 | * @interruptible: do an interruptible wait (normally yes) |
1192 | * @timeout: in - how long to wait (NULL forever); out - how much time remaining | |
1193 | * | |
f69061be DV |
1194 | * Note: It is of utmost importance that the passed in seqno and reset_counter |
1195 | * values have been read by the caller in an smp safe manner. Where read-side | |
1196 | * locks are involved, it is sufficient to read the reset_counter before | |
1197 | * unlocking the lock that protects the seqno. For lockless tricks, the | |
1198 | * reset_counter _must_ be read before, and an appropriate smp_rmb must be | |
1199 | * inserted. | |
1200 | * | |
9c654818 | 1201 | * Returns 0 if the request was found within the alloted time. Else returns the |
b361237b CW |
1202 | * errno with remaining time filled in timeout argument. |
1203 | */ | |
9c654818 | 1204 | int __i915_wait_request(struct drm_i915_gem_request *req, |
f69061be | 1205 | unsigned reset_counter, |
b29c19b6 | 1206 | bool interruptible, |
5ed0bdf2 | 1207 | s64 *timeout, |
2e1b8730 | 1208 | struct intel_rps_client *rps) |
b361237b | 1209 | { |
9c654818 | 1210 | struct intel_engine_cs *ring = i915_gem_request_get_ring(req); |
3d13ef2e | 1211 | struct drm_device *dev = ring->dev; |
3e31c6c0 | 1212 | struct drm_i915_private *dev_priv = dev->dev_private; |
168c3f21 MK |
1213 | const bool irq_test_in_progress = |
1214 | ACCESS_ONCE(dev_priv->gpu_error.test_irq_rings) & intel_ring_flag(ring); | |
094f9a54 | 1215 | DEFINE_WAIT(wait); |
47e9766d | 1216 | unsigned long timeout_expire; |
5ed0bdf2 | 1217 | s64 before, now; |
b361237b CW |
1218 | int ret; |
1219 | ||
9df7575f | 1220 | WARN(!intel_irqs_enabled(dev_priv), "IRQs disabled"); |
c67a470b | 1221 | |
b4716185 CW |
1222 | if (list_empty(&req->list)) |
1223 | return 0; | |
1224 | ||
1b5a433a | 1225 | if (i915_gem_request_completed(req, true)) |
b361237b CW |
1226 | return 0; |
1227 | ||
7bd0e226 DV |
1228 | timeout_expire = timeout ? |
1229 | jiffies + nsecs_to_jiffies_timeout((u64)*timeout) : 0; | |
b361237b | 1230 | |
2e1b8730 | 1231 | if (INTEL_INFO(dev_priv)->gen >= 6) |
e61b9958 | 1232 | gen6_rps_boost(dev_priv, rps, req->emitted_jiffies); |
b361237b | 1233 | |
094f9a54 | 1234 | /* Record current time in case interrupted by signal, or wedged */ |
74328ee5 | 1235 | trace_i915_gem_request_wait_begin(req); |
5ed0bdf2 | 1236 | before = ktime_get_raw_ns(); |
2def4ad9 CW |
1237 | |
1238 | /* Optimistic spin for the next jiffie before touching IRQs */ | |
1239 | ret = __i915_spin_request(req); | |
1240 | if (ret == 0) | |
1241 | goto out; | |
1242 | ||
1243 | if (!irq_test_in_progress && WARN_ON(!ring->irq_get(ring))) { | |
1244 | ret = -ENODEV; | |
1245 | goto out; | |
1246 | } | |
1247 | ||
094f9a54 CW |
1248 | for (;;) { |
1249 | struct timer_list timer; | |
b361237b | 1250 | |
094f9a54 CW |
1251 | prepare_to_wait(&ring->irq_queue, &wait, |
1252 | interruptible ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); | |
b361237b | 1253 | |
f69061be DV |
1254 | /* We need to check whether any gpu reset happened in between |
1255 | * the caller grabbing the seqno and now ... */ | |
094f9a54 CW |
1256 | if (reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter)) { |
1257 | /* ... but upgrade the -EAGAIN to an -EIO if the gpu | |
1258 | * is truely gone. */ | |
1259 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible); | |
1260 | if (ret == 0) | |
1261 | ret = -EAGAIN; | |
1262 | break; | |
1263 | } | |
f69061be | 1264 | |
1b5a433a | 1265 | if (i915_gem_request_completed(req, false)) { |
094f9a54 CW |
1266 | ret = 0; |
1267 | break; | |
1268 | } | |
b361237b | 1269 | |
094f9a54 CW |
1270 | if (interruptible && signal_pending(current)) { |
1271 | ret = -ERESTARTSYS; | |
1272 | break; | |
1273 | } | |
1274 | ||
47e9766d | 1275 | if (timeout && time_after_eq(jiffies, timeout_expire)) { |
094f9a54 CW |
1276 | ret = -ETIME; |
1277 | break; | |
1278 | } | |
1279 | ||
1280 | timer.function = NULL; | |
1281 | if (timeout || missed_irq(dev_priv, ring)) { | |
47e9766d MK |
1282 | unsigned long expire; |
1283 | ||
094f9a54 | 1284 | setup_timer_on_stack(&timer, fake_irq, (unsigned long)current); |
47e9766d | 1285 | expire = missed_irq(dev_priv, ring) ? jiffies + 1 : timeout_expire; |
094f9a54 CW |
1286 | mod_timer(&timer, expire); |
1287 | } | |
1288 | ||
5035c275 | 1289 | io_schedule(); |
094f9a54 | 1290 | |
094f9a54 CW |
1291 | if (timer.function) { |
1292 | del_singleshot_timer_sync(&timer); | |
1293 | destroy_timer_on_stack(&timer); | |
1294 | } | |
1295 | } | |
168c3f21 MK |
1296 | if (!irq_test_in_progress) |
1297 | ring->irq_put(ring); | |
094f9a54 CW |
1298 | |
1299 | finish_wait(&ring->irq_queue, &wait); | |
b361237b | 1300 | |
2def4ad9 CW |
1301 | out: |
1302 | now = ktime_get_raw_ns(); | |
1303 | trace_i915_gem_request_wait_end(req); | |
1304 | ||
b361237b | 1305 | if (timeout) { |
5ed0bdf2 TG |
1306 | s64 tres = *timeout - (now - before); |
1307 | ||
1308 | *timeout = tres < 0 ? 0 : tres; | |
9cca3068 DV |
1309 | |
1310 | /* | |
1311 | * Apparently ktime isn't accurate enough and occasionally has a | |
1312 | * bit of mismatch in the jiffies<->nsecs<->ktime loop. So patch | |
1313 | * things up to make the test happy. We allow up to 1 jiffy. | |
1314 | * | |
1315 | * This is a regrssion from the timespec->ktime conversion. | |
1316 | */ | |
1317 | if (ret == -ETIME && *timeout < jiffies_to_usecs(1)*1000) | |
1318 | *timeout = 0; | |
b361237b CW |
1319 | } |
1320 | ||
094f9a54 | 1321 | return ret; |
b361237b CW |
1322 | } |
1323 | ||
fcfa423c JH |
1324 | int i915_gem_request_add_to_client(struct drm_i915_gem_request *req, |
1325 | struct drm_file *file) | |
1326 | { | |
1327 | struct drm_i915_private *dev_private; | |
1328 | struct drm_i915_file_private *file_priv; | |
1329 | ||
1330 | WARN_ON(!req || !file || req->file_priv); | |
1331 | ||
1332 | if (!req || !file) | |
1333 | return -EINVAL; | |
1334 | ||
1335 | if (req->file_priv) | |
1336 | return -EINVAL; | |
1337 | ||
1338 | dev_private = req->ring->dev->dev_private; | |
1339 | file_priv = file->driver_priv; | |
1340 | ||
1341 | spin_lock(&file_priv->mm.lock); | |
1342 | req->file_priv = file_priv; | |
1343 | list_add_tail(&req->client_list, &file_priv->mm.request_list); | |
1344 | spin_unlock(&file_priv->mm.lock); | |
1345 | ||
1346 | req->pid = get_pid(task_pid(current)); | |
1347 | ||
1348 | return 0; | |
1349 | } | |
1350 | ||
b4716185 CW |
1351 | static inline void |
1352 | i915_gem_request_remove_from_client(struct drm_i915_gem_request *request) | |
1353 | { | |
1354 | struct drm_i915_file_private *file_priv = request->file_priv; | |
1355 | ||
1356 | if (!file_priv) | |
1357 | return; | |
1358 | ||
1359 | spin_lock(&file_priv->mm.lock); | |
1360 | list_del(&request->client_list); | |
1361 | request->file_priv = NULL; | |
1362 | spin_unlock(&file_priv->mm.lock); | |
fcfa423c JH |
1363 | |
1364 | put_pid(request->pid); | |
1365 | request->pid = NULL; | |
b4716185 CW |
1366 | } |
1367 | ||
1368 | static void i915_gem_request_retire(struct drm_i915_gem_request *request) | |
1369 | { | |
1370 | trace_i915_gem_request_retire(request); | |
1371 | ||
1372 | /* We know the GPU must have read the request to have | |
1373 | * sent us the seqno + interrupt, so use the position | |
1374 | * of tail of the request to update the last known position | |
1375 | * of the GPU head. | |
1376 | * | |
1377 | * Note this requires that we are always called in request | |
1378 | * completion order. | |
1379 | */ | |
1380 | request->ringbuf->last_retired_head = request->postfix; | |
1381 | ||
1382 | list_del_init(&request->list); | |
1383 | i915_gem_request_remove_from_client(request); | |
1384 | ||
b4716185 CW |
1385 | i915_gem_request_unreference(request); |
1386 | } | |
1387 | ||
1388 | static void | |
1389 | __i915_gem_request_retire__upto(struct drm_i915_gem_request *req) | |
1390 | { | |
1391 | struct intel_engine_cs *engine = req->ring; | |
1392 | struct drm_i915_gem_request *tmp; | |
1393 | ||
1394 | lockdep_assert_held(&engine->dev->struct_mutex); | |
1395 | ||
1396 | if (list_empty(&req->list)) | |
1397 | return; | |
1398 | ||
1399 | do { | |
1400 | tmp = list_first_entry(&engine->request_list, | |
1401 | typeof(*tmp), list); | |
1402 | ||
1403 | i915_gem_request_retire(tmp); | |
1404 | } while (tmp != req); | |
1405 | ||
1406 | WARN_ON(i915_verify_lists(engine->dev)); | |
1407 | } | |
1408 | ||
b361237b | 1409 | /** |
a4b3a571 | 1410 | * Waits for a request to be signaled, and cleans up the |
b361237b CW |
1411 | * request and object lists appropriately for that event. |
1412 | */ | |
1413 | int | |
a4b3a571 | 1414 | i915_wait_request(struct drm_i915_gem_request *req) |
b361237b | 1415 | { |
a4b3a571 DV |
1416 | struct drm_device *dev; |
1417 | struct drm_i915_private *dev_priv; | |
1418 | bool interruptible; | |
b361237b CW |
1419 | int ret; |
1420 | ||
a4b3a571 DV |
1421 | BUG_ON(req == NULL); |
1422 | ||
1423 | dev = req->ring->dev; | |
1424 | dev_priv = dev->dev_private; | |
1425 | interruptible = dev_priv->mm.interruptible; | |
1426 | ||
b361237b | 1427 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); |
b361237b | 1428 | |
33196ded | 1429 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible); |
b361237b CW |
1430 | if (ret) |
1431 | return ret; | |
1432 | ||
b4716185 CW |
1433 | ret = __i915_wait_request(req, |
1434 | atomic_read(&dev_priv->gpu_error.reset_counter), | |
9c654818 | 1435 | interruptible, NULL, NULL); |
b4716185 CW |
1436 | if (ret) |
1437 | return ret; | |
d26e3af8 | 1438 | |
b4716185 | 1439 | __i915_gem_request_retire__upto(req); |
d26e3af8 CW |
1440 | return 0; |
1441 | } | |
1442 | ||
b361237b CW |
1443 | /** |
1444 | * Ensures that all rendering to the object has completed and the object is | |
1445 | * safe to unbind from the GTT or access from the CPU. | |
1446 | */ | |
2e2f351d | 1447 | int |
b361237b CW |
1448 | i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj, |
1449 | bool readonly) | |
1450 | { | |
b4716185 | 1451 | int ret, i; |
b361237b | 1452 | |
b4716185 | 1453 | if (!obj->active) |
b361237b CW |
1454 | return 0; |
1455 | ||
b4716185 CW |
1456 | if (readonly) { |
1457 | if (obj->last_write_req != NULL) { | |
1458 | ret = i915_wait_request(obj->last_write_req); | |
1459 | if (ret) | |
1460 | return ret; | |
b361237b | 1461 | |
b4716185 CW |
1462 | i = obj->last_write_req->ring->id; |
1463 | if (obj->last_read_req[i] == obj->last_write_req) | |
1464 | i915_gem_object_retire__read(obj, i); | |
1465 | else | |
1466 | i915_gem_object_retire__write(obj); | |
1467 | } | |
1468 | } else { | |
1469 | for (i = 0; i < I915_NUM_RINGS; i++) { | |
1470 | if (obj->last_read_req[i] == NULL) | |
1471 | continue; | |
1472 | ||
1473 | ret = i915_wait_request(obj->last_read_req[i]); | |
1474 | if (ret) | |
1475 | return ret; | |
1476 | ||
1477 | i915_gem_object_retire__read(obj, i); | |
1478 | } | |
1479 | RQ_BUG_ON(obj->active); | |
1480 | } | |
1481 | ||
1482 | return 0; | |
1483 | } | |
1484 | ||
1485 | static void | |
1486 | i915_gem_object_retire_request(struct drm_i915_gem_object *obj, | |
1487 | struct drm_i915_gem_request *req) | |
1488 | { | |
1489 | int ring = req->ring->id; | |
1490 | ||
1491 | if (obj->last_read_req[ring] == req) | |
1492 | i915_gem_object_retire__read(obj, ring); | |
1493 | else if (obj->last_write_req == req) | |
1494 | i915_gem_object_retire__write(obj); | |
1495 | ||
1496 | __i915_gem_request_retire__upto(req); | |
b361237b CW |
1497 | } |
1498 | ||
3236f57a CW |
1499 | /* A nonblocking variant of the above wait. This is a highly dangerous routine |
1500 | * as the object state may change during this call. | |
1501 | */ | |
1502 | static __must_check int | |
1503 | i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj, | |
2e1b8730 | 1504 | struct intel_rps_client *rps, |
3236f57a CW |
1505 | bool readonly) |
1506 | { | |
1507 | struct drm_device *dev = obj->base.dev; | |
1508 | struct drm_i915_private *dev_priv = dev->dev_private; | |
b4716185 | 1509 | struct drm_i915_gem_request *requests[I915_NUM_RINGS]; |
f69061be | 1510 | unsigned reset_counter; |
b4716185 | 1511 | int ret, i, n = 0; |
3236f57a CW |
1512 | |
1513 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); | |
1514 | BUG_ON(!dev_priv->mm.interruptible); | |
1515 | ||
b4716185 | 1516 | if (!obj->active) |
3236f57a CW |
1517 | return 0; |
1518 | ||
33196ded | 1519 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, true); |
3236f57a CW |
1520 | if (ret) |
1521 | return ret; | |
1522 | ||
f69061be | 1523 | reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); |
b4716185 CW |
1524 | |
1525 | if (readonly) { | |
1526 | struct drm_i915_gem_request *req; | |
1527 | ||
1528 | req = obj->last_write_req; | |
1529 | if (req == NULL) | |
1530 | return 0; | |
1531 | ||
b4716185 CW |
1532 | requests[n++] = i915_gem_request_reference(req); |
1533 | } else { | |
1534 | for (i = 0; i < I915_NUM_RINGS; i++) { | |
1535 | struct drm_i915_gem_request *req; | |
1536 | ||
1537 | req = obj->last_read_req[i]; | |
1538 | if (req == NULL) | |
1539 | continue; | |
1540 | ||
b4716185 CW |
1541 | requests[n++] = i915_gem_request_reference(req); |
1542 | } | |
1543 | } | |
1544 | ||
3236f57a | 1545 | mutex_unlock(&dev->struct_mutex); |
b4716185 CW |
1546 | for (i = 0; ret == 0 && i < n; i++) |
1547 | ret = __i915_wait_request(requests[i], reset_counter, true, | |
2e1b8730 | 1548 | NULL, rps); |
3236f57a CW |
1549 | mutex_lock(&dev->struct_mutex); |
1550 | ||
b4716185 CW |
1551 | for (i = 0; i < n; i++) { |
1552 | if (ret == 0) | |
1553 | i915_gem_object_retire_request(obj, requests[i]); | |
1554 | i915_gem_request_unreference(requests[i]); | |
1555 | } | |
1556 | ||
1557 | return ret; | |
3236f57a CW |
1558 | } |
1559 | ||
2e1b8730 CW |
1560 | static struct intel_rps_client *to_rps_client(struct drm_file *file) |
1561 | { | |
1562 | struct drm_i915_file_private *fpriv = file->driver_priv; | |
1563 | return &fpriv->rps; | |
1564 | } | |
1565 | ||
673a394b | 1566 | /** |
2ef7eeaa EA |
1567 | * Called when user space prepares to use an object with the CPU, either |
1568 | * through the mmap ioctl's mapping or a GTT mapping. | |
673a394b EA |
1569 | */ |
1570 | int | |
1571 | i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1572 | struct drm_file *file) |
673a394b EA |
1573 | { |
1574 | struct drm_i915_gem_set_domain *args = data; | |
05394f39 | 1575 | struct drm_i915_gem_object *obj; |
2ef7eeaa EA |
1576 | uint32_t read_domains = args->read_domains; |
1577 | uint32_t write_domain = args->write_domain; | |
673a394b EA |
1578 | int ret; |
1579 | ||
2ef7eeaa | 1580 | /* Only handle setting domains to types used by the CPU. */ |
21d509e3 | 1581 | if (write_domain & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
1582 | return -EINVAL; |
1583 | ||
21d509e3 | 1584 | if (read_domains & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
1585 | return -EINVAL; |
1586 | ||
1587 | /* Having something in the write domain implies it's in the read | |
1588 | * domain, and only that read domain. Enforce that in the request. | |
1589 | */ | |
1590 | if (write_domain != 0 && read_domains != write_domain) | |
1591 | return -EINVAL; | |
1592 | ||
76c1dec1 | 1593 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1594 | if (ret) |
76c1dec1 | 1595 | return ret; |
1d7cfea1 | 1596 | |
05394f39 | 1597 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 1598 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1599 | ret = -ENOENT; |
1600 | goto unlock; | |
76c1dec1 | 1601 | } |
673a394b | 1602 | |
3236f57a CW |
1603 | /* Try to flush the object off the GPU without holding the lock. |
1604 | * We will repeat the flush holding the lock in the normal manner | |
1605 | * to catch cases where we are gazumped. | |
1606 | */ | |
6e4930f6 | 1607 | ret = i915_gem_object_wait_rendering__nonblocking(obj, |
2e1b8730 | 1608 | to_rps_client(file), |
6e4930f6 | 1609 | !write_domain); |
3236f57a CW |
1610 | if (ret) |
1611 | goto unref; | |
1612 | ||
43566ded | 1613 | if (read_domains & I915_GEM_DOMAIN_GTT) |
2ef7eeaa | 1614 | ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0); |
43566ded | 1615 | else |
e47c68e9 | 1616 | ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0); |
2ef7eeaa | 1617 | |
031b698a DV |
1618 | if (write_domain != 0) |
1619 | intel_fb_obj_invalidate(obj, | |
1620 | write_domain == I915_GEM_DOMAIN_GTT ? | |
1621 | ORIGIN_GTT : ORIGIN_CPU); | |
1622 | ||
3236f57a | 1623 | unref: |
05394f39 | 1624 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1625 | unlock: |
673a394b EA |
1626 | mutex_unlock(&dev->struct_mutex); |
1627 | return ret; | |
1628 | } | |
1629 | ||
1630 | /** | |
1631 | * Called when user space has done writes to this buffer | |
1632 | */ | |
1633 | int | |
1634 | i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1635 | struct drm_file *file) |
673a394b EA |
1636 | { |
1637 | struct drm_i915_gem_sw_finish *args = data; | |
05394f39 | 1638 | struct drm_i915_gem_object *obj; |
673a394b EA |
1639 | int ret = 0; |
1640 | ||
76c1dec1 | 1641 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1642 | if (ret) |
76c1dec1 | 1643 | return ret; |
1d7cfea1 | 1644 | |
05394f39 | 1645 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 1646 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1647 | ret = -ENOENT; |
1648 | goto unlock; | |
673a394b EA |
1649 | } |
1650 | ||
673a394b | 1651 | /* Pinned buffers may be scanout, so flush the cache */ |
2c22569b | 1652 | if (obj->pin_display) |
e62b59e4 | 1653 | i915_gem_object_flush_cpu_write_domain(obj); |
e47c68e9 | 1654 | |
05394f39 | 1655 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1656 | unlock: |
673a394b EA |
1657 | mutex_unlock(&dev->struct_mutex); |
1658 | return ret; | |
1659 | } | |
1660 | ||
1661 | /** | |
1662 | * Maps the contents of an object, returning the address it is mapped | |
1663 | * into. | |
1664 | * | |
1665 | * While the mapping holds a reference on the contents of the object, it doesn't | |
1666 | * imply a ref on the object itself. | |
34367381 DV |
1667 | * |
1668 | * IMPORTANT: | |
1669 | * | |
1670 | * DRM driver writers who look a this function as an example for how to do GEM | |
1671 | * mmap support, please don't implement mmap support like here. The modern way | |
1672 | * to implement DRM mmap support is with an mmap offset ioctl (like | |
1673 | * i915_gem_mmap_gtt) and then using the mmap syscall on the DRM fd directly. | |
1674 | * That way debug tooling like valgrind will understand what's going on, hiding | |
1675 | * the mmap call in a driver private ioctl will break that. The i915 driver only | |
1676 | * does cpu mmaps this way because we didn't know better. | |
673a394b EA |
1677 | */ |
1678 | int | |
1679 | i915_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1680 | struct drm_file *file) |
673a394b EA |
1681 | { |
1682 | struct drm_i915_gem_mmap *args = data; | |
1683 | struct drm_gem_object *obj; | |
673a394b EA |
1684 | unsigned long addr; |
1685 | ||
1816f923 AG |
1686 | if (args->flags & ~(I915_MMAP_WC)) |
1687 | return -EINVAL; | |
1688 | ||
1689 | if (args->flags & I915_MMAP_WC && !cpu_has_pat) | |
1690 | return -ENODEV; | |
1691 | ||
05394f39 | 1692 | obj = drm_gem_object_lookup(dev, file, args->handle); |
673a394b | 1693 | if (obj == NULL) |
bf79cb91 | 1694 | return -ENOENT; |
673a394b | 1695 | |
1286ff73 DV |
1696 | /* prime objects have no backing filp to GEM mmap |
1697 | * pages from. | |
1698 | */ | |
1699 | if (!obj->filp) { | |
1700 | drm_gem_object_unreference_unlocked(obj); | |
1701 | return -EINVAL; | |
1702 | } | |
1703 | ||
6be5ceb0 | 1704 | addr = vm_mmap(obj->filp, 0, args->size, |
673a394b EA |
1705 | PROT_READ | PROT_WRITE, MAP_SHARED, |
1706 | args->offset); | |
1816f923 AG |
1707 | if (args->flags & I915_MMAP_WC) { |
1708 | struct mm_struct *mm = current->mm; | |
1709 | struct vm_area_struct *vma; | |
1710 | ||
1711 | down_write(&mm->mmap_sem); | |
1712 | vma = find_vma(mm, addr); | |
1713 | if (vma) | |
1714 | vma->vm_page_prot = | |
1715 | pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
1716 | else | |
1717 | addr = -ENOMEM; | |
1718 | up_write(&mm->mmap_sem); | |
1719 | } | |
bc9025bd | 1720 | drm_gem_object_unreference_unlocked(obj); |
673a394b EA |
1721 | if (IS_ERR((void *)addr)) |
1722 | return addr; | |
1723 | ||
1724 | args->addr_ptr = (uint64_t) addr; | |
1725 | ||
1726 | return 0; | |
1727 | } | |
1728 | ||
de151cf6 JB |
1729 | /** |
1730 | * i915_gem_fault - fault a page into the GTT | |
1731 | * vma: VMA in question | |
1732 | * vmf: fault info | |
1733 | * | |
1734 | * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped | |
1735 | * from userspace. The fault handler takes care of binding the object to | |
1736 | * the GTT (if needed), allocating and programming a fence register (again, | |
1737 | * only if needed based on whether the old reg is still valid or the object | |
1738 | * is tiled) and inserting a new PTE into the faulting process. | |
1739 | * | |
1740 | * Note that the faulting process may involve evicting existing objects | |
1741 | * from the GTT and/or fence registers to make room. So performance may | |
1742 | * suffer if the GTT working set is large or there are few fence registers | |
1743 | * left. | |
1744 | */ | |
1745 | int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1746 | { | |
05394f39 CW |
1747 | struct drm_i915_gem_object *obj = to_intel_bo(vma->vm_private_data); |
1748 | struct drm_device *dev = obj->base.dev; | |
3e31c6c0 | 1749 | struct drm_i915_private *dev_priv = dev->dev_private; |
c5ad54cf | 1750 | struct i915_ggtt_view view = i915_ggtt_view_normal; |
de151cf6 JB |
1751 | pgoff_t page_offset; |
1752 | unsigned long pfn; | |
1753 | int ret = 0; | |
0f973f27 | 1754 | bool write = !!(vmf->flags & FAULT_FLAG_WRITE); |
de151cf6 | 1755 | |
f65c9168 PZ |
1756 | intel_runtime_pm_get(dev_priv); |
1757 | ||
de151cf6 JB |
1758 | /* We don't use vmf->pgoff since that has the fake offset */ |
1759 | page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> | |
1760 | PAGE_SHIFT; | |
1761 | ||
d9bc7e9f CW |
1762 | ret = i915_mutex_lock_interruptible(dev); |
1763 | if (ret) | |
1764 | goto out; | |
a00b10c3 | 1765 | |
db53a302 CW |
1766 | trace_i915_gem_object_fault(obj, page_offset, true, write); |
1767 | ||
6e4930f6 CW |
1768 | /* Try to flush the object off the GPU first without holding the lock. |
1769 | * Upon reacquiring the lock, we will perform our sanity checks and then | |
1770 | * repeat the flush holding the lock in the normal manner to catch cases | |
1771 | * where we are gazumped. | |
1772 | */ | |
1773 | ret = i915_gem_object_wait_rendering__nonblocking(obj, NULL, !write); | |
1774 | if (ret) | |
1775 | goto unlock; | |
1776 | ||
eb119bd6 CW |
1777 | /* Access to snoopable pages through the GTT is incoherent. */ |
1778 | if (obj->cache_level != I915_CACHE_NONE && !HAS_LLC(dev)) { | |
ddeff6ee | 1779 | ret = -EFAULT; |
eb119bd6 CW |
1780 | goto unlock; |
1781 | } | |
1782 | ||
c5ad54cf | 1783 | /* Use a partial view if the object is bigger than the aperture. */ |
e7ded2d7 JL |
1784 | if (obj->base.size >= dev_priv->gtt.mappable_end && |
1785 | obj->tiling_mode == I915_TILING_NONE) { | |
c5ad54cf | 1786 | static const unsigned int chunk_size = 256; // 1 MiB |
e7ded2d7 | 1787 | |
c5ad54cf JL |
1788 | memset(&view, 0, sizeof(view)); |
1789 | view.type = I915_GGTT_VIEW_PARTIAL; | |
1790 | view.params.partial.offset = rounddown(page_offset, chunk_size); | |
1791 | view.params.partial.size = | |
1792 | min_t(unsigned int, | |
1793 | chunk_size, | |
1794 | (vma->vm_end - vma->vm_start)/PAGE_SIZE - | |
1795 | view.params.partial.offset); | |
1796 | } | |
1797 | ||
1798 | /* Now pin it into the GTT if needed */ | |
1799 | ret = i915_gem_object_ggtt_pin(obj, &view, 0, PIN_MAPPABLE); | |
c9839303 CW |
1800 | if (ret) |
1801 | goto unlock; | |
4a684a41 | 1802 | |
c9839303 CW |
1803 | ret = i915_gem_object_set_to_gtt_domain(obj, write); |
1804 | if (ret) | |
1805 | goto unpin; | |
74898d7e | 1806 | |
06d98131 | 1807 | ret = i915_gem_object_get_fence(obj); |
d9e86c0e | 1808 | if (ret) |
c9839303 | 1809 | goto unpin; |
7d1c4804 | 1810 | |
b90b91d8 | 1811 | /* Finally, remap it using the new GTT offset */ |
c5ad54cf JL |
1812 | pfn = dev_priv->gtt.mappable_base + |
1813 | i915_gem_obj_ggtt_offset_view(obj, &view); | |
f343c5f6 | 1814 | pfn >>= PAGE_SHIFT; |
de151cf6 | 1815 | |
c5ad54cf JL |
1816 | if (unlikely(view.type == I915_GGTT_VIEW_PARTIAL)) { |
1817 | /* Overriding existing pages in partial view does not cause | |
1818 | * us any trouble as TLBs are still valid because the fault | |
1819 | * is due to userspace losing part of the mapping or never | |
1820 | * having accessed it before (at this partials' range). | |
1821 | */ | |
1822 | unsigned long base = vma->vm_start + | |
1823 | (view.params.partial.offset << PAGE_SHIFT); | |
1824 | unsigned int i; | |
b90b91d8 | 1825 | |
c5ad54cf JL |
1826 | for (i = 0; i < view.params.partial.size; i++) { |
1827 | ret = vm_insert_pfn(vma, base + i * PAGE_SIZE, pfn + i); | |
b90b91d8 CW |
1828 | if (ret) |
1829 | break; | |
1830 | } | |
1831 | ||
1832 | obj->fault_mappable = true; | |
c5ad54cf JL |
1833 | } else { |
1834 | if (!obj->fault_mappable) { | |
1835 | unsigned long size = min_t(unsigned long, | |
1836 | vma->vm_end - vma->vm_start, | |
1837 | obj->base.size); | |
1838 | int i; | |
1839 | ||
1840 | for (i = 0; i < size >> PAGE_SHIFT; i++) { | |
1841 | ret = vm_insert_pfn(vma, | |
1842 | (unsigned long)vma->vm_start + i * PAGE_SIZE, | |
1843 | pfn + i); | |
1844 | if (ret) | |
1845 | break; | |
1846 | } | |
1847 | ||
1848 | obj->fault_mappable = true; | |
1849 | } else | |
1850 | ret = vm_insert_pfn(vma, | |
1851 | (unsigned long)vmf->virtual_address, | |
1852 | pfn + page_offset); | |
1853 | } | |
c9839303 | 1854 | unpin: |
c5ad54cf | 1855 | i915_gem_object_ggtt_unpin_view(obj, &view); |
c715089f | 1856 | unlock: |
de151cf6 | 1857 | mutex_unlock(&dev->struct_mutex); |
d9bc7e9f | 1858 | out: |
de151cf6 | 1859 | switch (ret) { |
d9bc7e9f | 1860 | case -EIO: |
2232f031 DV |
1861 | /* |
1862 | * We eat errors when the gpu is terminally wedged to avoid | |
1863 | * userspace unduly crashing (gl has no provisions for mmaps to | |
1864 | * fail). But any other -EIO isn't ours (e.g. swap in failure) | |
1865 | * and so needs to be reported. | |
1866 | */ | |
1867 | if (!i915_terminally_wedged(&dev_priv->gpu_error)) { | |
f65c9168 PZ |
1868 | ret = VM_FAULT_SIGBUS; |
1869 | break; | |
1870 | } | |
045e769a | 1871 | case -EAGAIN: |
571c608d DV |
1872 | /* |
1873 | * EAGAIN means the gpu is hung and we'll wait for the error | |
1874 | * handler to reset everything when re-faulting in | |
1875 | * i915_mutex_lock_interruptible. | |
d9bc7e9f | 1876 | */ |
c715089f CW |
1877 | case 0: |
1878 | case -ERESTARTSYS: | |
bed636ab | 1879 | case -EINTR: |
e79e0fe3 DR |
1880 | case -EBUSY: |
1881 | /* | |
1882 | * EBUSY is ok: this just means that another thread | |
1883 | * already did the job. | |
1884 | */ | |
f65c9168 PZ |
1885 | ret = VM_FAULT_NOPAGE; |
1886 | break; | |
de151cf6 | 1887 | case -ENOMEM: |
f65c9168 PZ |
1888 | ret = VM_FAULT_OOM; |
1889 | break; | |
a7c2e1aa | 1890 | case -ENOSPC: |
45d67817 | 1891 | case -EFAULT: |
f65c9168 PZ |
1892 | ret = VM_FAULT_SIGBUS; |
1893 | break; | |
de151cf6 | 1894 | default: |
a7c2e1aa | 1895 | WARN_ONCE(ret, "unhandled error in i915_gem_fault: %i\n", ret); |
f65c9168 PZ |
1896 | ret = VM_FAULT_SIGBUS; |
1897 | break; | |
de151cf6 | 1898 | } |
f65c9168 PZ |
1899 | |
1900 | intel_runtime_pm_put(dev_priv); | |
1901 | return ret; | |
de151cf6 JB |
1902 | } |
1903 | ||
901782b2 CW |
1904 | /** |
1905 | * i915_gem_release_mmap - remove physical page mappings | |
1906 | * @obj: obj in question | |
1907 | * | |
af901ca1 | 1908 | * Preserve the reservation of the mmapping with the DRM core code, but |
901782b2 CW |
1909 | * relinquish ownership of the pages back to the system. |
1910 | * | |
1911 | * It is vital that we remove the page mapping if we have mapped a tiled | |
1912 | * object through the GTT and then lose the fence register due to | |
1913 | * resource pressure. Similarly if the object has been moved out of the | |
1914 | * aperture, than pages mapped into userspace must be revoked. Removing the | |
1915 | * mapping will then trigger a page fault on the next user access, allowing | |
1916 | * fixup by i915_gem_fault(). | |
1917 | */ | |
d05ca301 | 1918 | void |
05394f39 | 1919 | i915_gem_release_mmap(struct drm_i915_gem_object *obj) |
901782b2 | 1920 | { |
6299f992 CW |
1921 | if (!obj->fault_mappable) |
1922 | return; | |
901782b2 | 1923 | |
6796cb16 DH |
1924 | drm_vma_node_unmap(&obj->base.vma_node, |
1925 | obj->base.dev->anon_inode->i_mapping); | |
6299f992 | 1926 | obj->fault_mappable = false; |
901782b2 CW |
1927 | } |
1928 | ||
eedd10f4 CW |
1929 | void |
1930 | i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv) | |
1931 | { | |
1932 | struct drm_i915_gem_object *obj; | |
1933 | ||
1934 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) | |
1935 | i915_gem_release_mmap(obj); | |
1936 | } | |
1937 | ||
0fa87796 | 1938 | uint32_t |
e28f8711 | 1939 | i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode) |
92b88aeb | 1940 | { |
e28f8711 | 1941 | uint32_t gtt_size; |
92b88aeb CW |
1942 | |
1943 | if (INTEL_INFO(dev)->gen >= 4 || | |
e28f8711 CW |
1944 | tiling_mode == I915_TILING_NONE) |
1945 | return size; | |
92b88aeb CW |
1946 | |
1947 | /* Previous chips need a power-of-two fence region when tiling */ | |
1948 | if (INTEL_INFO(dev)->gen == 3) | |
e28f8711 | 1949 | gtt_size = 1024*1024; |
92b88aeb | 1950 | else |
e28f8711 | 1951 | gtt_size = 512*1024; |
92b88aeb | 1952 | |
e28f8711 CW |
1953 | while (gtt_size < size) |
1954 | gtt_size <<= 1; | |
92b88aeb | 1955 | |
e28f8711 | 1956 | return gtt_size; |
92b88aeb CW |
1957 | } |
1958 | ||
de151cf6 JB |
1959 | /** |
1960 | * i915_gem_get_gtt_alignment - return required GTT alignment for an object | |
1961 | * @obj: object to check | |
1962 | * | |
1963 | * Return the required GTT alignment for an object, taking into account | |
5e783301 | 1964 | * potential fence register mapping. |
de151cf6 | 1965 | */ |
d865110c ID |
1966 | uint32_t |
1967 | i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size, | |
1968 | int tiling_mode, bool fenced) | |
de151cf6 | 1969 | { |
de151cf6 JB |
1970 | /* |
1971 | * Minimum alignment is 4k (GTT page size), but might be greater | |
1972 | * if a fence register is needed for the object. | |
1973 | */ | |
d865110c | 1974 | if (INTEL_INFO(dev)->gen >= 4 || (!fenced && IS_G33(dev)) || |
e28f8711 | 1975 | tiling_mode == I915_TILING_NONE) |
de151cf6 JB |
1976 | return 4096; |
1977 | ||
a00b10c3 CW |
1978 | /* |
1979 | * Previous chips need to be aligned to the size of the smallest | |
1980 | * fence register that can contain the object. | |
1981 | */ | |
e28f8711 | 1982 | return i915_gem_get_gtt_size(dev, size, tiling_mode); |
a00b10c3 CW |
1983 | } |
1984 | ||
d8cb5086 CW |
1985 | static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj) |
1986 | { | |
1987 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
1988 | int ret; | |
1989 | ||
0de23977 | 1990 | if (drm_vma_node_has_offset(&obj->base.vma_node)) |
d8cb5086 CW |
1991 | return 0; |
1992 | ||
da494d7c DV |
1993 | dev_priv->mm.shrinker_no_lock_stealing = true; |
1994 | ||
d8cb5086 CW |
1995 | ret = drm_gem_create_mmap_offset(&obj->base); |
1996 | if (ret != -ENOSPC) | |
da494d7c | 1997 | goto out; |
d8cb5086 CW |
1998 | |
1999 | /* Badly fragmented mmap space? The only way we can recover | |
2000 | * space is by destroying unwanted objects. We can't randomly release | |
2001 | * mmap_offsets as userspace expects them to be persistent for the | |
2002 | * lifetime of the objects. The closest we can is to release the | |
2003 | * offsets on purgeable objects by truncating it and marking it purged, | |
2004 | * which prevents userspace from ever using that object again. | |
2005 | */ | |
21ab4e74 CW |
2006 | i915_gem_shrink(dev_priv, |
2007 | obj->base.size >> PAGE_SHIFT, | |
2008 | I915_SHRINK_BOUND | | |
2009 | I915_SHRINK_UNBOUND | | |
2010 | I915_SHRINK_PURGEABLE); | |
d8cb5086 CW |
2011 | ret = drm_gem_create_mmap_offset(&obj->base); |
2012 | if (ret != -ENOSPC) | |
da494d7c | 2013 | goto out; |
d8cb5086 CW |
2014 | |
2015 | i915_gem_shrink_all(dev_priv); | |
da494d7c DV |
2016 | ret = drm_gem_create_mmap_offset(&obj->base); |
2017 | out: | |
2018 | dev_priv->mm.shrinker_no_lock_stealing = false; | |
2019 | ||
2020 | return ret; | |
d8cb5086 CW |
2021 | } |
2022 | ||
2023 | static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object *obj) | |
2024 | { | |
d8cb5086 CW |
2025 | drm_gem_free_mmap_offset(&obj->base); |
2026 | } | |
2027 | ||
da6b51d0 | 2028 | int |
ff72145b DA |
2029 | i915_gem_mmap_gtt(struct drm_file *file, |
2030 | struct drm_device *dev, | |
da6b51d0 | 2031 | uint32_t handle, |
ff72145b | 2032 | uint64_t *offset) |
de151cf6 | 2033 | { |
05394f39 | 2034 | struct drm_i915_gem_object *obj; |
de151cf6 JB |
2035 | int ret; |
2036 | ||
76c1dec1 | 2037 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 2038 | if (ret) |
76c1dec1 | 2039 | return ret; |
de151cf6 | 2040 | |
ff72145b | 2041 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle)); |
c8725226 | 2042 | if (&obj->base == NULL) { |
1d7cfea1 CW |
2043 | ret = -ENOENT; |
2044 | goto unlock; | |
2045 | } | |
de151cf6 | 2046 | |
05394f39 | 2047 | if (obj->madv != I915_MADV_WILLNEED) { |
bd9b6a4e | 2048 | DRM_DEBUG("Attempting to mmap a purgeable buffer\n"); |
8c99e57d | 2049 | ret = -EFAULT; |
1d7cfea1 | 2050 | goto out; |
ab18282d CW |
2051 | } |
2052 | ||
d8cb5086 CW |
2053 | ret = i915_gem_object_create_mmap_offset(obj); |
2054 | if (ret) | |
2055 | goto out; | |
de151cf6 | 2056 | |
0de23977 | 2057 | *offset = drm_vma_node_offset_addr(&obj->base.vma_node); |
de151cf6 | 2058 | |
1d7cfea1 | 2059 | out: |
05394f39 | 2060 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 2061 | unlock: |
de151cf6 | 2062 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 2063 | return ret; |
de151cf6 JB |
2064 | } |
2065 | ||
ff72145b DA |
2066 | /** |
2067 | * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing | |
2068 | * @dev: DRM device | |
2069 | * @data: GTT mapping ioctl data | |
2070 | * @file: GEM object info | |
2071 | * | |
2072 | * Simply returns the fake offset to userspace so it can mmap it. | |
2073 | * The mmap call will end up in drm_gem_mmap(), which will set things | |
2074 | * up so we can get faults in the handler above. | |
2075 | * | |
2076 | * The fault handler will take care of binding the object into the GTT | |
2077 | * (since it may have been evicted to make room for something), allocating | |
2078 | * a fence register, and mapping the appropriate aperture address into | |
2079 | * userspace. | |
2080 | */ | |
2081 | int | |
2082 | i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, | |
2083 | struct drm_file *file) | |
2084 | { | |
2085 | struct drm_i915_gem_mmap_gtt *args = data; | |
2086 | ||
da6b51d0 | 2087 | return i915_gem_mmap_gtt(file, dev, args->handle, &args->offset); |
ff72145b DA |
2088 | } |
2089 | ||
225067ee DV |
2090 | /* Immediately discard the backing storage */ |
2091 | static void | |
2092 | i915_gem_object_truncate(struct drm_i915_gem_object *obj) | |
e5281ccd | 2093 | { |
4d6294bf | 2094 | i915_gem_object_free_mmap_offset(obj); |
1286ff73 | 2095 | |
4d6294bf CW |
2096 | if (obj->base.filp == NULL) |
2097 | return; | |
e5281ccd | 2098 | |
225067ee DV |
2099 | /* Our goal here is to return as much of the memory as |
2100 | * is possible back to the system as we are called from OOM. | |
2101 | * To do this we must instruct the shmfs to drop all of its | |
2102 | * backing pages, *now*. | |
2103 | */ | |
5537252b | 2104 | shmem_truncate_range(file_inode(obj->base.filp), 0, (loff_t)-1); |
225067ee DV |
2105 | obj->madv = __I915_MADV_PURGED; |
2106 | } | |
e5281ccd | 2107 | |
5537252b CW |
2108 | /* Try to discard unwanted pages */ |
2109 | static void | |
2110 | i915_gem_object_invalidate(struct drm_i915_gem_object *obj) | |
225067ee | 2111 | { |
5537252b CW |
2112 | struct address_space *mapping; |
2113 | ||
2114 | switch (obj->madv) { | |
2115 | case I915_MADV_DONTNEED: | |
2116 | i915_gem_object_truncate(obj); | |
2117 | case __I915_MADV_PURGED: | |
2118 | return; | |
2119 | } | |
2120 | ||
2121 | if (obj->base.filp == NULL) | |
2122 | return; | |
2123 | ||
2124 | mapping = file_inode(obj->base.filp)->i_mapping, | |
2125 | invalidate_mapping_pages(mapping, 0, (loff_t)-1); | |
e5281ccd CW |
2126 | } |
2127 | ||
5cdf5881 | 2128 | static void |
05394f39 | 2129 | i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj) |
673a394b | 2130 | { |
90797e6d ID |
2131 | struct sg_page_iter sg_iter; |
2132 | int ret; | |
1286ff73 | 2133 | |
05394f39 | 2134 | BUG_ON(obj->madv == __I915_MADV_PURGED); |
673a394b | 2135 | |
6c085a72 CW |
2136 | ret = i915_gem_object_set_to_cpu_domain(obj, true); |
2137 | if (ret) { | |
2138 | /* In the event of a disaster, abandon all caches and | |
2139 | * hope for the best. | |
2140 | */ | |
2141 | WARN_ON(ret != -EIO); | |
2c22569b | 2142 | i915_gem_clflush_object(obj, true); |
6c085a72 CW |
2143 | obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
2144 | } | |
2145 | ||
e2273302 ID |
2146 | i915_gem_gtt_finish_object(obj); |
2147 | ||
6dacfd2f | 2148 | if (i915_gem_object_needs_bit17_swizzle(obj)) |
280b713b EA |
2149 | i915_gem_object_save_bit_17_swizzle(obj); |
2150 | ||
05394f39 CW |
2151 | if (obj->madv == I915_MADV_DONTNEED) |
2152 | obj->dirty = 0; | |
3ef94daa | 2153 | |
90797e6d | 2154 | for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0) { |
2db76d7c | 2155 | struct page *page = sg_page_iter_page(&sg_iter); |
9da3da66 | 2156 | |
05394f39 | 2157 | if (obj->dirty) |
9da3da66 | 2158 | set_page_dirty(page); |
3ef94daa | 2159 | |
05394f39 | 2160 | if (obj->madv == I915_MADV_WILLNEED) |
9da3da66 | 2161 | mark_page_accessed(page); |
3ef94daa | 2162 | |
9da3da66 | 2163 | page_cache_release(page); |
3ef94daa | 2164 | } |
05394f39 | 2165 | obj->dirty = 0; |
673a394b | 2166 | |
9da3da66 CW |
2167 | sg_free_table(obj->pages); |
2168 | kfree(obj->pages); | |
37e680a1 | 2169 | } |
6c085a72 | 2170 | |
dd624afd | 2171 | int |
37e680a1 CW |
2172 | i915_gem_object_put_pages(struct drm_i915_gem_object *obj) |
2173 | { | |
2174 | const struct drm_i915_gem_object_ops *ops = obj->ops; | |
2175 | ||
2f745ad3 | 2176 | if (obj->pages == NULL) |
37e680a1 CW |
2177 | return 0; |
2178 | ||
a5570178 CW |
2179 | if (obj->pages_pin_count) |
2180 | return -EBUSY; | |
2181 | ||
9843877d | 2182 | BUG_ON(i915_gem_obj_bound_any(obj)); |
3e123027 | 2183 | |
a2165e31 CW |
2184 | /* ->put_pages might need to allocate memory for the bit17 swizzle |
2185 | * array, hence protect them from being reaped by removing them from gtt | |
2186 | * lists early. */ | |
35c20a60 | 2187 | list_del(&obj->global_list); |
a2165e31 | 2188 | |
37e680a1 | 2189 | ops->put_pages(obj); |
05394f39 | 2190 | obj->pages = NULL; |
37e680a1 | 2191 | |
5537252b | 2192 | i915_gem_object_invalidate(obj); |
6c085a72 CW |
2193 | |
2194 | return 0; | |
2195 | } | |
2196 | ||
37e680a1 | 2197 | static int |
6c085a72 | 2198 | i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) |
e5281ccd | 2199 | { |
6c085a72 | 2200 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
e5281ccd CW |
2201 | int page_count, i; |
2202 | struct address_space *mapping; | |
9da3da66 CW |
2203 | struct sg_table *st; |
2204 | struct scatterlist *sg; | |
90797e6d | 2205 | struct sg_page_iter sg_iter; |
e5281ccd | 2206 | struct page *page; |
90797e6d | 2207 | unsigned long last_pfn = 0; /* suppress gcc warning */ |
e2273302 | 2208 | int ret; |
6c085a72 | 2209 | gfp_t gfp; |
e5281ccd | 2210 | |
6c085a72 CW |
2211 | /* Assert that the object is not currently in any GPU domain. As it |
2212 | * wasn't in the GTT, there shouldn't be any way it could have been in | |
2213 | * a GPU cache | |
2214 | */ | |
2215 | BUG_ON(obj->base.read_domains & I915_GEM_GPU_DOMAINS); | |
2216 | BUG_ON(obj->base.write_domain & I915_GEM_GPU_DOMAINS); | |
2217 | ||
9da3da66 CW |
2218 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
2219 | if (st == NULL) | |
2220 | return -ENOMEM; | |
2221 | ||
05394f39 | 2222 | page_count = obj->base.size / PAGE_SIZE; |
9da3da66 | 2223 | if (sg_alloc_table(st, page_count, GFP_KERNEL)) { |
9da3da66 | 2224 | kfree(st); |
e5281ccd | 2225 | return -ENOMEM; |
9da3da66 | 2226 | } |
e5281ccd | 2227 | |
9da3da66 CW |
2228 | /* Get the list of pages out of our struct file. They'll be pinned |
2229 | * at this point until we release them. | |
2230 | * | |
2231 | * Fail silently without starting the shrinker | |
2232 | */ | |
496ad9aa | 2233 | mapping = file_inode(obj->base.filp)->i_mapping; |
6c085a72 | 2234 | gfp = mapping_gfp_mask(mapping); |
caf49191 | 2235 | gfp |= __GFP_NORETRY | __GFP_NOWARN | __GFP_NO_KSWAPD; |
6c085a72 | 2236 | gfp &= ~(__GFP_IO | __GFP_WAIT); |
90797e6d ID |
2237 | sg = st->sgl; |
2238 | st->nents = 0; | |
2239 | for (i = 0; i < page_count; i++) { | |
6c085a72 CW |
2240 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); |
2241 | if (IS_ERR(page)) { | |
21ab4e74 CW |
2242 | i915_gem_shrink(dev_priv, |
2243 | page_count, | |
2244 | I915_SHRINK_BOUND | | |
2245 | I915_SHRINK_UNBOUND | | |
2246 | I915_SHRINK_PURGEABLE); | |
6c085a72 CW |
2247 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); |
2248 | } | |
2249 | if (IS_ERR(page)) { | |
2250 | /* We've tried hard to allocate the memory by reaping | |
2251 | * our own buffer, now let the real VM do its job and | |
2252 | * go down in flames if truly OOM. | |
2253 | */ | |
6c085a72 | 2254 | i915_gem_shrink_all(dev_priv); |
f461d1be | 2255 | page = shmem_read_mapping_page(mapping, i); |
e2273302 ID |
2256 | if (IS_ERR(page)) { |
2257 | ret = PTR_ERR(page); | |
6c085a72 | 2258 | goto err_pages; |
e2273302 | 2259 | } |
6c085a72 | 2260 | } |
426729dc KRW |
2261 | #ifdef CONFIG_SWIOTLB |
2262 | if (swiotlb_nr_tbl()) { | |
2263 | st->nents++; | |
2264 | sg_set_page(sg, page, PAGE_SIZE, 0); | |
2265 | sg = sg_next(sg); | |
2266 | continue; | |
2267 | } | |
2268 | #endif | |
90797e6d ID |
2269 | if (!i || page_to_pfn(page) != last_pfn + 1) { |
2270 | if (i) | |
2271 | sg = sg_next(sg); | |
2272 | st->nents++; | |
2273 | sg_set_page(sg, page, PAGE_SIZE, 0); | |
2274 | } else { | |
2275 | sg->length += PAGE_SIZE; | |
2276 | } | |
2277 | last_pfn = page_to_pfn(page); | |
3bbbe706 DV |
2278 | |
2279 | /* Check that the i965g/gm workaround works. */ | |
2280 | WARN_ON((gfp & __GFP_DMA32) && (last_pfn >= 0x00100000UL)); | |
e5281ccd | 2281 | } |
426729dc KRW |
2282 | #ifdef CONFIG_SWIOTLB |
2283 | if (!swiotlb_nr_tbl()) | |
2284 | #endif | |
2285 | sg_mark_end(sg); | |
74ce6b6c CW |
2286 | obj->pages = st; |
2287 | ||
e2273302 ID |
2288 | ret = i915_gem_gtt_prepare_object(obj); |
2289 | if (ret) | |
2290 | goto err_pages; | |
2291 | ||
6dacfd2f | 2292 | if (i915_gem_object_needs_bit17_swizzle(obj)) |
e5281ccd CW |
2293 | i915_gem_object_do_bit_17_swizzle(obj); |
2294 | ||
656bfa3a DV |
2295 | if (obj->tiling_mode != I915_TILING_NONE && |
2296 | dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) | |
2297 | i915_gem_object_pin_pages(obj); | |
2298 | ||
e5281ccd CW |
2299 | return 0; |
2300 | ||
2301 | err_pages: | |
90797e6d ID |
2302 | sg_mark_end(sg); |
2303 | for_each_sg_page(st->sgl, &sg_iter, st->nents, 0) | |
2db76d7c | 2304 | page_cache_release(sg_page_iter_page(&sg_iter)); |
9da3da66 CW |
2305 | sg_free_table(st); |
2306 | kfree(st); | |
0820baf3 CW |
2307 | |
2308 | /* shmemfs first checks if there is enough memory to allocate the page | |
2309 | * and reports ENOSPC should there be insufficient, along with the usual | |
2310 | * ENOMEM for a genuine allocation failure. | |
2311 | * | |
2312 | * We use ENOSPC in our driver to mean that we have run out of aperture | |
2313 | * space and so want to translate the error from shmemfs back to our | |
2314 | * usual understanding of ENOMEM. | |
2315 | */ | |
e2273302 ID |
2316 | if (ret == -ENOSPC) |
2317 | ret = -ENOMEM; | |
2318 | ||
2319 | return ret; | |
673a394b EA |
2320 | } |
2321 | ||
37e680a1 CW |
2322 | /* Ensure that the associated pages are gathered from the backing storage |
2323 | * and pinned into our object. i915_gem_object_get_pages() may be called | |
2324 | * multiple times before they are released by a single call to | |
2325 | * i915_gem_object_put_pages() - once the pages are no longer referenced | |
2326 | * either as a result of memory pressure (reaping pages under the shrinker) | |
2327 | * or as the object is itself released. | |
2328 | */ | |
2329 | int | |
2330 | i915_gem_object_get_pages(struct drm_i915_gem_object *obj) | |
2331 | { | |
2332 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
2333 | const struct drm_i915_gem_object_ops *ops = obj->ops; | |
2334 | int ret; | |
2335 | ||
2f745ad3 | 2336 | if (obj->pages) |
37e680a1 CW |
2337 | return 0; |
2338 | ||
43e28f09 | 2339 | if (obj->madv != I915_MADV_WILLNEED) { |
bd9b6a4e | 2340 | DRM_DEBUG("Attempting to obtain a purgeable object\n"); |
8c99e57d | 2341 | return -EFAULT; |
43e28f09 CW |
2342 | } |
2343 | ||
a5570178 CW |
2344 | BUG_ON(obj->pages_pin_count); |
2345 | ||
37e680a1 CW |
2346 | ret = ops->get_pages(obj); |
2347 | if (ret) | |
2348 | return ret; | |
2349 | ||
35c20a60 | 2350 | list_add_tail(&obj->global_list, &dev_priv->mm.unbound_list); |
ee286370 CW |
2351 | |
2352 | obj->get_page.sg = obj->pages->sgl; | |
2353 | obj->get_page.last = 0; | |
2354 | ||
37e680a1 | 2355 | return 0; |
673a394b EA |
2356 | } |
2357 | ||
b4716185 | 2358 | void i915_vma_move_to_active(struct i915_vma *vma, |
b2af0376 | 2359 | struct drm_i915_gem_request *req) |
673a394b | 2360 | { |
b4716185 | 2361 | struct drm_i915_gem_object *obj = vma->obj; |
b2af0376 JH |
2362 | struct intel_engine_cs *ring; |
2363 | ||
2364 | ring = i915_gem_request_get_ring(req); | |
673a394b EA |
2365 | |
2366 | /* Add a reference if we're newly entering the active list. */ | |
b4716185 | 2367 | if (obj->active == 0) |
05394f39 | 2368 | drm_gem_object_reference(&obj->base); |
b4716185 | 2369 | obj->active |= intel_ring_flag(ring); |
e35a41de | 2370 | |
b4716185 | 2371 | list_move_tail(&obj->ring_list[ring->id], &ring->active_list); |
b2af0376 | 2372 | i915_gem_request_assign(&obj->last_read_req[ring->id], req); |
caea7476 | 2373 | |
b4716185 | 2374 | list_move_tail(&vma->mm_list, &vma->vm->active_list); |
caea7476 CW |
2375 | } |
2376 | ||
b4716185 CW |
2377 | static void |
2378 | i915_gem_object_retire__write(struct drm_i915_gem_object *obj) | |
e2d05a8b | 2379 | { |
b4716185 CW |
2380 | RQ_BUG_ON(obj->last_write_req == NULL); |
2381 | RQ_BUG_ON(!(obj->active & intel_ring_flag(obj->last_write_req->ring))); | |
2382 | ||
2383 | i915_gem_request_assign(&obj->last_write_req, NULL); | |
de152b62 | 2384 | intel_fb_obj_flush(obj, true, ORIGIN_CS); |
e2d05a8b BW |
2385 | } |
2386 | ||
caea7476 | 2387 | static void |
b4716185 | 2388 | i915_gem_object_retire__read(struct drm_i915_gem_object *obj, int ring) |
ce44b0ea | 2389 | { |
feb822cf | 2390 | struct i915_vma *vma; |
ce44b0ea | 2391 | |
b4716185 CW |
2392 | RQ_BUG_ON(obj->last_read_req[ring] == NULL); |
2393 | RQ_BUG_ON(!(obj->active & (1 << ring))); | |
2394 | ||
2395 | list_del_init(&obj->ring_list[ring]); | |
2396 | i915_gem_request_assign(&obj->last_read_req[ring], NULL); | |
2397 | ||
2398 | if (obj->last_write_req && obj->last_write_req->ring->id == ring) | |
2399 | i915_gem_object_retire__write(obj); | |
2400 | ||
2401 | obj->active &= ~(1 << ring); | |
2402 | if (obj->active) | |
2403 | return; | |
caea7476 | 2404 | |
fe14d5f4 TU |
2405 | list_for_each_entry(vma, &obj->vma_list, vma_link) { |
2406 | if (!list_empty(&vma->mm_list)) | |
2407 | list_move_tail(&vma->mm_list, &vma->vm->inactive_list); | |
feb822cf | 2408 | } |
caea7476 | 2409 | |
97b2a6a1 | 2410 | i915_gem_request_assign(&obj->last_fenced_req, NULL); |
caea7476 | 2411 | drm_gem_object_unreference(&obj->base); |
c8725f3d CW |
2412 | } |
2413 | ||
9d773091 | 2414 | static int |
fca26bb4 | 2415 | i915_gem_init_seqno(struct drm_device *dev, u32 seqno) |
53d227f2 | 2416 | { |
9d773091 | 2417 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4872ba6 | 2418 | struct intel_engine_cs *ring; |
9d773091 | 2419 | int ret, i, j; |
53d227f2 | 2420 | |
107f27a5 | 2421 | /* Carefully retire all requests without writing to the rings */ |
9d773091 | 2422 | for_each_ring(ring, dev_priv, i) { |
107f27a5 CW |
2423 | ret = intel_ring_idle(ring); |
2424 | if (ret) | |
2425 | return ret; | |
9d773091 | 2426 | } |
9d773091 | 2427 | i915_gem_retire_requests(dev); |
107f27a5 CW |
2428 | |
2429 | /* Finally reset hw state */ | |
9d773091 | 2430 | for_each_ring(ring, dev_priv, i) { |
fca26bb4 | 2431 | intel_ring_init_seqno(ring, seqno); |
498d2ac1 | 2432 | |
ebc348b2 BW |
2433 | for (j = 0; j < ARRAY_SIZE(ring->semaphore.sync_seqno); j++) |
2434 | ring->semaphore.sync_seqno[j] = 0; | |
9d773091 | 2435 | } |
53d227f2 | 2436 | |
9d773091 | 2437 | return 0; |
53d227f2 DV |
2438 | } |
2439 | ||
fca26bb4 MK |
2440 | int i915_gem_set_seqno(struct drm_device *dev, u32 seqno) |
2441 | { | |
2442 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2443 | int ret; | |
2444 | ||
2445 | if (seqno == 0) | |
2446 | return -EINVAL; | |
2447 | ||
2448 | /* HWS page needs to be set less than what we | |
2449 | * will inject to ring | |
2450 | */ | |
2451 | ret = i915_gem_init_seqno(dev, seqno - 1); | |
2452 | if (ret) | |
2453 | return ret; | |
2454 | ||
2455 | /* Carefully set the last_seqno value so that wrap | |
2456 | * detection still works | |
2457 | */ | |
2458 | dev_priv->next_seqno = seqno; | |
2459 | dev_priv->last_seqno = seqno - 1; | |
2460 | if (dev_priv->last_seqno == 0) | |
2461 | dev_priv->last_seqno--; | |
2462 | ||
2463 | return 0; | |
2464 | } | |
2465 | ||
9d773091 CW |
2466 | int |
2467 | i915_gem_get_seqno(struct drm_device *dev, u32 *seqno) | |
53d227f2 | 2468 | { |
9d773091 CW |
2469 | struct drm_i915_private *dev_priv = dev->dev_private; |
2470 | ||
2471 | /* reserve 0 for non-seqno */ | |
2472 | if (dev_priv->next_seqno == 0) { | |
fca26bb4 | 2473 | int ret = i915_gem_init_seqno(dev, 0); |
9d773091 CW |
2474 | if (ret) |
2475 | return ret; | |
53d227f2 | 2476 | |
9d773091 CW |
2477 | dev_priv->next_seqno = 1; |
2478 | } | |
53d227f2 | 2479 | |
f72b3435 | 2480 | *seqno = dev_priv->last_seqno = dev_priv->next_seqno++; |
9d773091 | 2481 | return 0; |
53d227f2 DV |
2482 | } |
2483 | ||
bf7dc5b7 JH |
2484 | /* |
2485 | * NB: This function is not allowed to fail. Doing so would mean the the | |
2486 | * request is not being tracked for completion but the work itself is | |
2487 | * going to happen on the hardware. This would be a Bad Thing(tm). | |
2488 | */ | |
75289874 | 2489 | void __i915_add_request(struct drm_i915_gem_request *request, |
5b4a60c2 JH |
2490 | struct drm_i915_gem_object *obj, |
2491 | bool flush_caches) | |
673a394b | 2492 | { |
75289874 JH |
2493 | struct intel_engine_cs *ring; |
2494 | struct drm_i915_private *dev_priv; | |
48e29f55 | 2495 | struct intel_ringbuffer *ringbuf; |
6d3d8274 | 2496 | u32 request_start; |
3cce469c CW |
2497 | int ret; |
2498 | ||
48e29f55 | 2499 | if (WARN_ON(request == NULL)) |
bf7dc5b7 | 2500 | return; |
48e29f55 | 2501 | |
75289874 JH |
2502 | ring = request->ring; |
2503 | dev_priv = ring->dev->dev_private; | |
2504 | ringbuf = request->ringbuf; | |
2505 | ||
29b1b415 JH |
2506 | /* |
2507 | * To ensure that this call will not fail, space for its emissions | |
2508 | * should already have been reserved in the ring buffer. Let the ring | |
2509 | * know that it is time to use that space up. | |
2510 | */ | |
2511 | intel_ring_reserved_space_use(ringbuf); | |
2512 | ||
48e29f55 | 2513 | request_start = intel_ring_get_tail(ringbuf); |
cc889e0f DV |
2514 | /* |
2515 | * Emit any outstanding flushes - execbuf can fail to emit the flush | |
2516 | * after having emitted the batchbuffer command. Hence we need to fix | |
2517 | * things up similar to emitting the lazy request. The difference here | |
2518 | * is that the flush _must_ happen before the next request, no matter | |
2519 | * what. | |
2520 | */ | |
5b4a60c2 JH |
2521 | if (flush_caches) { |
2522 | if (i915.enable_execlists) | |
4866d729 | 2523 | ret = logical_ring_flush_all_caches(request); |
5b4a60c2 | 2524 | else |
4866d729 | 2525 | ret = intel_ring_flush_all_caches(request); |
5b4a60c2 JH |
2526 | /* Not allowed to fail! */ |
2527 | WARN(ret, "*_ring_flush_all_caches failed: %d!\n", ret); | |
2528 | } | |
cc889e0f | 2529 | |
a71d8d94 CW |
2530 | /* Record the position of the start of the request so that |
2531 | * should we detect the updated seqno part-way through the | |
2532 | * GPU processing the request, we never over-estimate the | |
2533 | * position of the head. | |
2534 | */ | |
6d3d8274 | 2535 | request->postfix = intel_ring_get_tail(ringbuf); |
a71d8d94 | 2536 | |
bf7dc5b7 | 2537 | if (i915.enable_execlists) |
c4e76638 | 2538 | ret = ring->emit_request(request); |
bf7dc5b7 | 2539 | else { |
ee044a88 | 2540 | ret = ring->add_request(request); |
53292cdb MT |
2541 | |
2542 | request->tail = intel_ring_get_tail(ringbuf); | |
48e29f55 | 2543 | } |
bf7dc5b7 JH |
2544 | /* Not allowed to fail! */ |
2545 | WARN(ret, "emit|add_request failed: %d!\n", ret); | |
673a394b | 2546 | |
7d736f4f | 2547 | request->head = request_start; |
7d736f4f MK |
2548 | |
2549 | /* Whilst this request exists, batch_obj will be on the | |
2550 | * active_list, and so will hold the active reference. Only when this | |
2551 | * request is retired will the the batch_obj be moved onto the | |
2552 | * inactive_list and lose its active reference. Hence we do not need | |
2553 | * to explicitly hold another reference here. | |
2554 | */ | |
9a7e0c2a | 2555 | request->batch_obj = obj; |
0e50e96b | 2556 | |
673a394b | 2557 | request->emitted_jiffies = jiffies; |
94f7bbe1 | 2558 | ring->last_submitted_seqno = request->seqno; |
852835f3 | 2559 | list_add_tail(&request->list, &ring->request_list); |
673a394b | 2560 | |
74328ee5 | 2561 | trace_i915_gem_request_add(request); |
db53a302 | 2562 | |
87255483 | 2563 | i915_queue_hangcheck(ring->dev); |
10cd45b6 | 2564 | |
87255483 DV |
2565 | queue_delayed_work(dev_priv->wq, |
2566 | &dev_priv->mm.retire_work, | |
2567 | round_jiffies_up_relative(HZ)); | |
2568 | intel_mark_busy(dev_priv->dev); | |
cc889e0f | 2569 | |
29b1b415 JH |
2570 | /* Sanity check that the reserved size was large enough. */ |
2571 | intel_ring_reserved_space_end(ringbuf); | |
673a394b EA |
2572 | } |
2573 | ||
939fd762 | 2574 | static bool i915_context_is_banned(struct drm_i915_private *dev_priv, |
273497e5 | 2575 | const struct intel_context *ctx) |
be62acb4 | 2576 | { |
44e2c070 | 2577 | unsigned long elapsed; |
be62acb4 | 2578 | |
44e2c070 MK |
2579 | elapsed = get_seconds() - ctx->hang_stats.guilty_ts; |
2580 | ||
2581 | if (ctx->hang_stats.banned) | |
be62acb4 MK |
2582 | return true; |
2583 | ||
676fa572 CW |
2584 | if (ctx->hang_stats.ban_period_seconds && |
2585 | elapsed <= ctx->hang_stats.ban_period_seconds) { | |
ccc7bed0 | 2586 | if (!i915_gem_context_is_default(ctx)) { |
3fac8978 | 2587 | DRM_DEBUG("context hanging too fast, banning!\n"); |
ccc7bed0 | 2588 | return true; |
88b4aa87 MK |
2589 | } else if (i915_stop_ring_allow_ban(dev_priv)) { |
2590 | if (i915_stop_ring_allow_warn(dev_priv)) | |
2591 | DRM_ERROR("gpu hanging too fast, banning!\n"); | |
ccc7bed0 | 2592 | return true; |
3fac8978 | 2593 | } |
be62acb4 MK |
2594 | } |
2595 | ||
2596 | return false; | |
2597 | } | |
2598 | ||
939fd762 | 2599 | static void i915_set_reset_status(struct drm_i915_private *dev_priv, |
273497e5 | 2600 | struct intel_context *ctx, |
b6b0fac0 | 2601 | const bool guilty) |
aa60c664 | 2602 | { |
44e2c070 MK |
2603 | struct i915_ctx_hang_stats *hs; |
2604 | ||
2605 | if (WARN_ON(!ctx)) | |
2606 | return; | |
aa60c664 | 2607 | |
44e2c070 MK |
2608 | hs = &ctx->hang_stats; |
2609 | ||
2610 | if (guilty) { | |
939fd762 | 2611 | hs->banned = i915_context_is_banned(dev_priv, ctx); |
44e2c070 MK |
2612 | hs->batch_active++; |
2613 | hs->guilty_ts = get_seconds(); | |
2614 | } else { | |
2615 | hs->batch_pending++; | |
aa60c664 MK |
2616 | } |
2617 | } | |
2618 | ||
abfe262a JH |
2619 | void i915_gem_request_free(struct kref *req_ref) |
2620 | { | |
2621 | struct drm_i915_gem_request *req = container_of(req_ref, | |
2622 | typeof(*req), ref); | |
2623 | struct intel_context *ctx = req->ctx; | |
2624 | ||
fcfa423c JH |
2625 | if (req->file_priv) |
2626 | i915_gem_request_remove_from_client(req); | |
2627 | ||
0794aed3 TD |
2628 | if (ctx) { |
2629 | if (i915.enable_execlists) { | |
8ba319da MK |
2630 | if (ctx != req->ring->default_context) |
2631 | intel_lr_context_unpin(req); | |
0794aed3 | 2632 | } |
abfe262a | 2633 | |
dcb4c12a OM |
2634 | i915_gem_context_unreference(ctx); |
2635 | } | |
abfe262a | 2636 | |
efab6d8d | 2637 | kmem_cache_free(req->i915->requests, req); |
0e50e96b MK |
2638 | } |
2639 | ||
6689cb2b | 2640 | int i915_gem_request_alloc(struct intel_engine_cs *ring, |
217e46b5 JH |
2641 | struct intel_context *ctx, |
2642 | struct drm_i915_gem_request **req_out) | |
6689cb2b | 2643 | { |
efab6d8d | 2644 | struct drm_i915_private *dev_priv = to_i915(ring->dev); |
eed29a5b | 2645 | struct drm_i915_gem_request *req; |
6689cb2b | 2646 | int ret; |
6689cb2b | 2647 | |
217e46b5 JH |
2648 | if (!req_out) |
2649 | return -EINVAL; | |
2650 | ||
bccca494 | 2651 | *req_out = NULL; |
6689cb2b | 2652 | |
eed29a5b DV |
2653 | req = kmem_cache_zalloc(dev_priv->requests, GFP_KERNEL); |
2654 | if (req == NULL) | |
6689cb2b JH |
2655 | return -ENOMEM; |
2656 | ||
eed29a5b | 2657 | ret = i915_gem_get_seqno(ring->dev, &req->seqno); |
9a0c1e27 CW |
2658 | if (ret) |
2659 | goto err; | |
6689cb2b | 2660 | |
40e895ce JH |
2661 | kref_init(&req->ref); |
2662 | req->i915 = dev_priv; | |
eed29a5b | 2663 | req->ring = ring; |
40e895ce JH |
2664 | req->ctx = ctx; |
2665 | i915_gem_context_reference(req->ctx); | |
6689cb2b JH |
2666 | |
2667 | if (i915.enable_execlists) | |
40e895ce | 2668 | ret = intel_logical_ring_alloc_request_extras(req); |
6689cb2b | 2669 | else |
eed29a5b | 2670 | ret = intel_ring_alloc_request_extras(req); |
40e895ce JH |
2671 | if (ret) { |
2672 | i915_gem_context_unreference(req->ctx); | |
9a0c1e27 | 2673 | goto err; |
40e895ce | 2674 | } |
6689cb2b | 2675 | |
29b1b415 JH |
2676 | /* |
2677 | * Reserve space in the ring buffer for all the commands required to | |
2678 | * eventually emit this request. This is to guarantee that the | |
2679 | * i915_add_request() call can't fail. Note that the reserve may need | |
2680 | * to be redone if the request is not actually submitted straight | |
2681 | * away, e.g. because a GPU scheduler has deferred it. | |
29b1b415 | 2682 | */ |
ccd98fe4 JH |
2683 | if (i915.enable_execlists) |
2684 | ret = intel_logical_ring_reserve_space(req); | |
2685 | else | |
2686 | ret = intel_ring_reserve_space(req); | |
2687 | if (ret) { | |
2688 | /* | |
2689 | * At this point, the request is fully allocated even if not | |
2690 | * fully prepared. Thus it can be cleaned up using the proper | |
2691 | * free code. | |
2692 | */ | |
2693 | i915_gem_request_cancel(req); | |
2694 | return ret; | |
2695 | } | |
29b1b415 | 2696 | |
bccca494 | 2697 | *req_out = req; |
6689cb2b | 2698 | return 0; |
9a0c1e27 CW |
2699 | |
2700 | err: | |
2701 | kmem_cache_free(dev_priv->requests, req); | |
2702 | return ret; | |
0e50e96b MK |
2703 | } |
2704 | ||
29b1b415 JH |
2705 | void i915_gem_request_cancel(struct drm_i915_gem_request *req) |
2706 | { | |
2707 | intel_ring_reserved_space_cancel(req->ringbuf); | |
2708 | ||
2709 | i915_gem_request_unreference(req); | |
2710 | } | |
2711 | ||
8d9fc7fd | 2712 | struct drm_i915_gem_request * |
a4872ba6 | 2713 | i915_gem_find_active_request(struct intel_engine_cs *ring) |
9375e446 | 2714 | { |
4db080f9 CW |
2715 | struct drm_i915_gem_request *request; |
2716 | ||
2717 | list_for_each_entry(request, &ring->request_list, list) { | |
1b5a433a | 2718 | if (i915_gem_request_completed(request, false)) |
4db080f9 | 2719 | continue; |
aa60c664 | 2720 | |
b6b0fac0 | 2721 | return request; |
4db080f9 | 2722 | } |
b6b0fac0 MK |
2723 | |
2724 | return NULL; | |
2725 | } | |
2726 | ||
2727 | static void i915_gem_reset_ring_status(struct drm_i915_private *dev_priv, | |
a4872ba6 | 2728 | struct intel_engine_cs *ring) |
b6b0fac0 MK |
2729 | { |
2730 | struct drm_i915_gem_request *request; | |
2731 | bool ring_hung; | |
2732 | ||
8d9fc7fd | 2733 | request = i915_gem_find_active_request(ring); |
b6b0fac0 MK |
2734 | |
2735 | if (request == NULL) | |
2736 | return; | |
2737 | ||
2738 | ring_hung = ring->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG; | |
2739 | ||
939fd762 | 2740 | i915_set_reset_status(dev_priv, request->ctx, ring_hung); |
b6b0fac0 MK |
2741 | |
2742 | list_for_each_entry_continue(request, &ring->request_list, list) | |
939fd762 | 2743 | i915_set_reset_status(dev_priv, request->ctx, false); |
4db080f9 | 2744 | } |
aa60c664 | 2745 | |
4db080f9 | 2746 | static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv, |
a4872ba6 | 2747 | struct intel_engine_cs *ring) |
4db080f9 | 2748 | { |
dfaae392 | 2749 | while (!list_empty(&ring->active_list)) { |
05394f39 | 2750 | struct drm_i915_gem_object *obj; |
9375e446 | 2751 | |
05394f39 CW |
2752 | obj = list_first_entry(&ring->active_list, |
2753 | struct drm_i915_gem_object, | |
b4716185 | 2754 | ring_list[ring->id]); |
9375e446 | 2755 | |
b4716185 | 2756 | i915_gem_object_retire__read(obj, ring->id); |
673a394b | 2757 | } |
1d62beea | 2758 | |
dcb4c12a OM |
2759 | /* |
2760 | * Clear the execlists queue up before freeing the requests, as those | |
2761 | * are the ones that keep the context and ringbuffer backing objects | |
2762 | * pinned in place. | |
2763 | */ | |
2764 | while (!list_empty(&ring->execlist_queue)) { | |
6d3d8274 | 2765 | struct drm_i915_gem_request *submit_req; |
dcb4c12a OM |
2766 | |
2767 | submit_req = list_first_entry(&ring->execlist_queue, | |
6d3d8274 | 2768 | struct drm_i915_gem_request, |
dcb4c12a OM |
2769 | execlist_link); |
2770 | list_del(&submit_req->execlist_link); | |
1197b4f2 MK |
2771 | |
2772 | if (submit_req->ctx != ring->default_context) | |
8ba319da | 2773 | intel_lr_context_unpin(submit_req); |
1197b4f2 | 2774 | |
b3a38998 | 2775 | i915_gem_request_unreference(submit_req); |
dcb4c12a OM |
2776 | } |
2777 | ||
1d62beea BW |
2778 | /* |
2779 | * We must free the requests after all the corresponding objects have | |
2780 | * been moved off active lists. Which is the same order as the normal | |
2781 | * retire_requests function does. This is important if object hold | |
2782 | * implicit references on things like e.g. ppgtt address spaces through | |
2783 | * the request. | |
2784 | */ | |
2785 | while (!list_empty(&ring->request_list)) { | |
2786 | struct drm_i915_gem_request *request; | |
2787 | ||
2788 | request = list_first_entry(&ring->request_list, | |
2789 | struct drm_i915_gem_request, | |
2790 | list); | |
2791 | ||
b4716185 | 2792 | i915_gem_request_retire(request); |
1d62beea | 2793 | } |
673a394b EA |
2794 | } |
2795 | ||
19b2dbde | 2796 | void i915_gem_restore_fences(struct drm_device *dev) |
312817a3 CW |
2797 | { |
2798 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2799 | int i; | |
2800 | ||
4b9de737 | 2801 | for (i = 0; i < dev_priv->num_fence_regs; i++) { |
312817a3 | 2802 | struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i]; |
7d2cb39c | 2803 | |
94a335db DV |
2804 | /* |
2805 | * Commit delayed tiling changes if we have an object still | |
2806 | * attached to the fence, otherwise just clear the fence. | |
2807 | */ | |
2808 | if (reg->obj) { | |
2809 | i915_gem_object_update_fence(reg->obj, reg, | |
2810 | reg->obj->tiling_mode); | |
2811 | } else { | |
2812 | i915_gem_write_fence(dev, i, NULL); | |
2813 | } | |
312817a3 CW |
2814 | } |
2815 | } | |
2816 | ||
069efc1d | 2817 | void i915_gem_reset(struct drm_device *dev) |
673a394b | 2818 | { |
77f01230 | 2819 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4872ba6 | 2820 | struct intel_engine_cs *ring; |
1ec14ad3 | 2821 | int i; |
673a394b | 2822 | |
4db080f9 CW |
2823 | /* |
2824 | * Before we free the objects from the requests, we need to inspect | |
2825 | * them for finding the guilty party. As the requests only borrow | |
2826 | * their reference to the objects, the inspection must be done first. | |
2827 | */ | |
2828 | for_each_ring(ring, dev_priv, i) | |
2829 | i915_gem_reset_ring_status(dev_priv, ring); | |
2830 | ||
b4519513 | 2831 | for_each_ring(ring, dev_priv, i) |
4db080f9 | 2832 | i915_gem_reset_ring_cleanup(dev_priv, ring); |
dfaae392 | 2833 | |
acce9ffa BW |
2834 | i915_gem_context_reset(dev); |
2835 | ||
19b2dbde | 2836 | i915_gem_restore_fences(dev); |
b4716185 CW |
2837 | |
2838 | WARN_ON(i915_verify_lists(dev)); | |
673a394b EA |
2839 | } |
2840 | ||
2841 | /** | |
2842 | * This function clears the request list as sequence numbers are passed. | |
2843 | */ | |
1cf0ba14 | 2844 | void |
a4872ba6 | 2845 | i915_gem_retire_requests_ring(struct intel_engine_cs *ring) |
673a394b | 2846 | { |
db53a302 | 2847 | WARN_ON(i915_verify_lists(ring->dev)); |
673a394b | 2848 | |
832a3aad CW |
2849 | /* Retire requests first as we use it above for the early return. |
2850 | * If we retire requests last, we may use a later seqno and so clear | |
2851 | * the requests lists without clearing the active list, leading to | |
2852 | * confusion. | |
e9103038 | 2853 | */ |
852835f3 | 2854 | while (!list_empty(&ring->request_list)) { |
673a394b | 2855 | struct drm_i915_gem_request *request; |
673a394b | 2856 | |
852835f3 | 2857 | request = list_first_entry(&ring->request_list, |
673a394b EA |
2858 | struct drm_i915_gem_request, |
2859 | list); | |
673a394b | 2860 | |
1b5a433a | 2861 | if (!i915_gem_request_completed(request, true)) |
b84d5f0c CW |
2862 | break; |
2863 | ||
b4716185 | 2864 | i915_gem_request_retire(request); |
b84d5f0c | 2865 | } |
673a394b | 2866 | |
832a3aad CW |
2867 | /* Move any buffers on the active list that are no longer referenced |
2868 | * by the ringbuffer to the flushing/inactive lists as appropriate, | |
2869 | * before we free the context associated with the requests. | |
2870 | */ | |
2871 | while (!list_empty(&ring->active_list)) { | |
2872 | struct drm_i915_gem_object *obj; | |
2873 | ||
2874 | obj = list_first_entry(&ring->active_list, | |
2875 | struct drm_i915_gem_object, | |
b4716185 | 2876 | ring_list[ring->id]); |
832a3aad | 2877 | |
b4716185 | 2878 | if (!list_empty(&obj->last_read_req[ring->id]->list)) |
832a3aad CW |
2879 | break; |
2880 | ||
b4716185 | 2881 | i915_gem_object_retire__read(obj, ring->id); |
832a3aad CW |
2882 | } |
2883 | ||
581c26e8 JH |
2884 | if (unlikely(ring->trace_irq_req && |
2885 | i915_gem_request_completed(ring->trace_irq_req, true))) { | |
1ec14ad3 | 2886 | ring->irq_put(ring); |
581c26e8 | 2887 | i915_gem_request_assign(&ring->trace_irq_req, NULL); |
9d34e5db | 2888 | } |
23bc5982 | 2889 | |
db53a302 | 2890 | WARN_ON(i915_verify_lists(ring->dev)); |
673a394b EA |
2891 | } |
2892 | ||
b29c19b6 | 2893 | bool |
b09a1fec CW |
2894 | i915_gem_retire_requests(struct drm_device *dev) |
2895 | { | |
3e31c6c0 | 2896 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4872ba6 | 2897 | struct intel_engine_cs *ring; |
b29c19b6 | 2898 | bool idle = true; |
1ec14ad3 | 2899 | int i; |
b09a1fec | 2900 | |
b29c19b6 | 2901 | for_each_ring(ring, dev_priv, i) { |
b4519513 | 2902 | i915_gem_retire_requests_ring(ring); |
b29c19b6 | 2903 | idle &= list_empty(&ring->request_list); |
c86ee3a9 TD |
2904 | if (i915.enable_execlists) { |
2905 | unsigned long flags; | |
2906 | ||
2907 | spin_lock_irqsave(&ring->execlist_lock, flags); | |
2908 | idle &= list_empty(&ring->execlist_queue); | |
2909 | spin_unlock_irqrestore(&ring->execlist_lock, flags); | |
2910 | ||
2911 | intel_execlists_retire_requests(ring); | |
2912 | } | |
b29c19b6 CW |
2913 | } |
2914 | ||
2915 | if (idle) | |
2916 | mod_delayed_work(dev_priv->wq, | |
2917 | &dev_priv->mm.idle_work, | |
2918 | msecs_to_jiffies(100)); | |
2919 | ||
2920 | return idle; | |
b09a1fec CW |
2921 | } |
2922 | ||
75ef9da2 | 2923 | static void |
673a394b EA |
2924 | i915_gem_retire_work_handler(struct work_struct *work) |
2925 | { | |
b29c19b6 CW |
2926 | struct drm_i915_private *dev_priv = |
2927 | container_of(work, typeof(*dev_priv), mm.retire_work.work); | |
2928 | struct drm_device *dev = dev_priv->dev; | |
0a58705b | 2929 | bool idle; |
673a394b | 2930 | |
891b48cf | 2931 | /* Come back later if the device is busy... */ |
b29c19b6 CW |
2932 | idle = false; |
2933 | if (mutex_trylock(&dev->struct_mutex)) { | |
2934 | idle = i915_gem_retire_requests(dev); | |
2935 | mutex_unlock(&dev->struct_mutex); | |
673a394b | 2936 | } |
b29c19b6 | 2937 | if (!idle) |
bcb45086 CW |
2938 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, |
2939 | round_jiffies_up_relative(HZ)); | |
b29c19b6 | 2940 | } |
0a58705b | 2941 | |
b29c19b6 CW |
2942 | static void |
2943 | i915_gem_idle_work_handler(struct work_struct *work) | |
2944 | { | |
2945 | struct drm_i915_private *dev_priv = | |
2946 | container_of(work, typeof(*dev_priv), mm.idle_work.work); | |
35c94185 | 2947 | struct drm_device *dev = dev_priv->dev; |
423795cb CW |
2948 | struct intel_engine_cs *ring; |
2949 | int i; | |
b29c19b6 | 2950 | |
423795cb CW |
2951 | for_each_ring(ring, dev_priv, i) |
2952 | if (!list_empty(&ring->request_list)) | |
2953 | return; | |
35c94185 CW |
2954 | |
2955 | intel_mark_idle(dev); | |
2956 | ||
2957 | if (mutex_trylock(&dev->struct_mutex)) { | |
2958 | struct intel_engine_cs *ring; | |
2959 | int i; | |
2960 | ||
2961 | for_each_ring(ring, dev_priv, i) | |
2962 | i915_gem_batch_pool_fini(&ring->batch_pool); | |
b29c19b6 | 2963 | |
35c94185 CW |
2964 | mutex_unlock(&dev->struct_mutex); |
2965 | } | |
673a394b EA |
2966 | } |
2967 | ||
30dfebf3 DV |
2968 | /** |
2969 | * Ensures that an object will eventually get non-busy by flushing any required | |
2970 | * write domains, emitting any outstanding lazy request and retiring and | |
2971 | * completed requests. | |
2972 | */ | |
2973 | static int | |
2974 | i915_gem_object_flush_active(struct drm_i915_gem_object *obj) | |
2975 | { | |
a5ac0f90 | 2976 | int i; |
b4716185 CW |
2977 | |
2978 | if (!obj->active) | |
2979 | return 0; | |
30dfebf3 | 2980 | |
b4716185 CW |
2981 | for (i = 0; i < I915_NUM_RINGS; i++) { |
2982 | struct drm_i915_gem_request *req; | |
41c52415 | 2983 | |
b4716185 CW |
2984 | req = obj->last_read_req[i]; |
2985 | if (req == NULL) | |
2986 | continue; | |
2987 | ||
2988 | if (list_empty(&req->list)) | |
2989 | goto retire; | |
2990 | ||
b4716185 CW |
2991 | if (i915_gem_request_completed(req, true)) { |
2992 | __i915_gem_request_retire__upto(req); | |
2993 | retire: | |
2994 | i915_gem_object_retire__read(obj, i); | |
2995 | } | |
30dfebf3 DV |
2996 | } |
2997 | ||
2998 | return 0; | |
2999 | } | |
3000 | ||
23ba4fd0 BW |
3001 | /** |
3002 | * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT | |
3003 | * @DRM_IOCTL_ARGS: standard ioctl arguments | |
3004 | * | |
3005 | * Returns 0 if successful, else an error is returned with the remaining time in | |
3006 | * the timeout parameter. | |
3007 | * -ETIME: object is still busy after timeout | |
3008 | * -ERESTARTSYS: signal interrupted the wait | |
3009 | * -ENONENT: object doesn't exist | |
3010 | * Also possible, but rare: | |
3011 | * -EAGAIN: GPU wedged | |
3012 | * -ENOMEM: damn | |
3013 | * -ENODEV: Internal IRQ fail | |
3014 | * -E?: The add request failed | |
3015 | * | |
3016 | * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any | |
3017 | * non-zero timeout parameter the wait ioctl will wait for the given number of | |
3018 | * nanoseconds on an object becoming unbusy. Since the wait itself does so | |
3019 | * without holding struct_mutex the object may become re-busied before this | |
3020 | * function completes. A similar but shorter * race condition exists in the busy | |
3021 | * ioctl | |
3022 | */ | |
3023 | int | |
3024 | i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) | |
3025 | { | |
3e31c6c0 | 3026 | struct drm_i915_private *dev_priv = dev->dev_private; |
23ba4fd0 BW |
3027 | struct drm_i915_gem_wait *args = data; |
3028 | struct drm_i915_gem_object *obj; | |
b4716185 | 3029 | struct drm_i915_gem_request *req[I915_NUM_RINGS]; |
f69061be | 3030 | unsigned reset_counter; |
b4716185 CW |
3031 | int i, n = 0; |
3032 | int ret; | |
23ba4fd0 | 3033 | |
11b5d511 DV |
3034 | if (args->flags != 0) |
3035 | return -EINVAL; | |
3036 | ||
23ba4fd0 BW |
3037 | ret = i915_mutex_lock_interruptible(dev); |
3038 | if (ret) | |
3039 | return ret; | |
3040 | ||
3041 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->bo_handle)); | |
3042 | if (&obj->base == NULL) { | |
3043 | mutex_unlock(&dev->struct_mutex); | |
3044 | return -ENOENT; | |
3045 | } | |
3046 | ||
30dfebf3 DV |
3047 | /* Need to make sure the object gets inactive eventually. */ |
3048 | ret = i915_gem_object_flush_active(obj); | |
23ba4fd0 BW |
3049 | if (ret) |
3050 | goto out; | |
3051 | ||
b4716185 | 3052 | if (!obj->active) |
97b2a6a1 | 3053 | goto out; |
23ba4fd0 | 3054 | |
23ba4fd0 | 3055 | /* Do this after OLR check to make sure we make forward progress polling |
762e4583 | 3056 | * on this IOCTL with a timeout == 0 (like busy ioctl) |
23ba4fd0 | 3057 | */ |
762e4583 | 3058 | if (args->timeout_ns == 0) { |
23ba4fd0 BW |
3059 | ret = -ETIME; |
3060 | goto out; | |
3061 | } | |
3062 | ||
3063 | drm_gem_object_unreference(&obj->base); | |
f69061be | 3064 | reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); |
b4716185 CW |
3065 | |
3066 | for (i = 0; i < I915_NUM_RINGS; i++) { | |
3067 | if (obj->last_read_req[i] == NULL) | |
3068 | continue; | |
3069 | ||
3070 | req[n++] = i915_gem_request_reference(obj->last_read_req[i]); | |
3071 | } | |
3072 | ||
23ba4fd0 BW |
3073 | mutex_unlock(&dev->struct_mutex); |
3074 | ||
b4716185 CW |
3075 | for (i = 0; i < n; i++) { |
3076 | if (ret == 0) | |
3077 | ret = __i915_wait_request(req[i], reset_counter, true, | |
3078 | args->timeout_ns > 0 ? &args->timeout_ns : NULL, | |
3079 | file->driver_priv); | |
3080 | i915_gem_request_unreference__unlocked(req[i]); | |
3081 | } | |
ff865885 | 3082 | return ret; |
23ba4fd0 BW |
3083 | |
3084 | out: | |
3085 | drm_gem_object_unreference(&obj->base); | |
3086 | mutex_unlock(&dev->struct_mutex); | |
3087 | return ret; | |
3088 | } | |
3089 | ||
b4716185 CW |
3090 | static int |
3091 | __i915_gem_object_sync(struct drm_i915_gem_object *obj, | |
3092 | struct intel_engine_cs *to, | |
91af127f JH |
3093 | struct drm_i915_gem_request *from_req, |
3094 | struct drm_i915_gem_request **to_req) | |
b4716185 CW |
3095 | { |
3096 | struct intel_engine_cs *from; | |
3097 | int ret; | |
3098 | ||
91af127f | 3099 | from = i915_gem_request_get_ring(from_req); |
b4716185 CW |
3100 | if (to == from) |
3101 | return 0; | |
3102 | ||
91af127f | 3103 | if (i915_gem_request_completed(from_req, true)) |
b4716185 CW |
3104 | return 0; |
3105 | ||
b4716185 | 3106 | if (!i915_semaphore_is_enabled(obj->base.dev)) { |
a6f766f3 | 3107 | struct drm_i915_private *i915 = to_i915(obj->base.dev); |
91af127f | 3108 | ret = __i915_wait_request(from_req, |
a6f766f3 CW |
3109 | atomic_read(&i915->gpu_error.reset_counter), |
3110 | i915->mm.interruptible, | |
3111 | NULL, | |
3112 | &i915->rps.semaphores); | |
b4716185 CW |
3113 | if (ret) |
3114 | return ret; | |
3115 | ||
91af127f | 3116 | i915_gem_object_retire_request(obj, from_req); |
b4716185 CW |
3117 | } else { |
3118 | int idx = intel_ring_sync_index(from, to); | |
91af127f JH |
3119 | u32 seqno = i915_gem_request_get_seqno(from_req); |
3120 | ||
3121 | WARN_ON(!to_req); | |
b4716185 CW |
3122 | |
3123 | if (seqno <= from->semaphore.sync_seqno[idx]) | |
3124 | return 0; | |
3125 | ||
91af127f JH |
3126 | if (*to_req == NULL) { |
3127 | ret = i915_gem_request_alloc(to, to->default_context, to_req); | |
3128 | if (ret) | |
3129 | return ret; | |
3130 | } | |
3131 | ||
599d924c JH |
3132 | trace_i915_gem_ring_sync_to(*to_req, from, from_req); |
3133 | ret = to->semaphore.sync_to(*to_req, from, seqno); | |
b4716185 CW |
3134 | if (ret) |
3135 | return ret; | |
3136 | ||
3137 | /* We use last_read_req because sync_to() | |
3138 | * might have just caused seqno wrap under | |
3139 | * the radar. | |
3140 | */ | |
3141 | from->semaphore.sync_seqno[idx] = | |
3142 | i915_gem_request_get_seqno(obj->last_read_req[from->id]); | |
3143 | } | |
3144 | ||
3145 | return 0; | |
3146 | } | |
3147 | ||
5816d648 BW |
3148 | /** |
3149 | * i915_gem_object_sync - sync an object to a ring. | |
3150 | * | |
3151 | * @obj: object which may be in use on another ring. | |
3152 | * @to: ring we wish to use the object on. May be NULL. | |
91af127f JH |
3153 | * @to_req: request we wish to use the object for. See below. |
3154 | * This will be allocated and returned if a request is | |
3155 | * required but not passed in. | |
5816d648 BW |
3156 | * |
3157 | * This code is meant to abstract object synchronization with the GPU. | |
3158 | * Calling with NULL implies synchronizing the object with the CPU | |
b4716185 | 3159 | * rather than a particular GPU ring. Conceptually we serialise writes |
91af127f | 3160 | * between engines inside the GPU. We only allow one engine to write |
b4716185 CW |
3161 | * into a buffer at any time, but multiple readers. To ensure each has |
3162 | * a coherent view of memory, we must: | |
3163 | * | |
3164 | * - If there is an outstanding write request to the object, the new | |
3165 | * request must wait for it to complete (either CPU or in hw, requests | |
3166 | * on the same ring will be naturally ordered). | |
3167 | * | |
3168 | * - If we are a write request (pending_write_domain is set), the new | |
3169 | * request must wait for outstanding read requests to complete. | |
5816d648 | 3170 | * |
91af127f JH |
3171 | * For CPU synchronisation (NULL to) no request is required. For syncing with |
3172 | * rings to_req must be non-NULL. However, a request does not have to be | |
3173 | * pre-allocated. If *to_req is NULL and sync commands will be emitted then a | |
3174 | * request will be allocated automatically and returned through *to_req. Note | |
3175 | * that it is not guaranteed that commands will be emitted (because the system | |
3176 | * might already be idle). Hence there is no need to create a request that | |
3177 | * might never have any work submitted. Note further that if a request is | |
3178 | * returned in *to_req, it is the responsibility of the caller to submit | |
3179 | * that request (after potentially adding more work to it). | |
3180 | * | |
5816d648 BW |
3181 | * Returns 0 if successful, else propagates up the lower layer error. |
3182 | */ | |
2911a35b BW |
3183 | int |
3184 | i915_gem_object_sync(struct drm_i915_gem_object *obj, | |
91af127f JH |
3185 | struct intel_engine_cs *to, |
3186 | struct drm_i915_gem_request **to_req) | |
2911a35b | 3187 | { |
b4716185 CW |
3188 | const bool readonly = obj->base.pending_write_domain == 0; |
3189 | struct drm_i915_gem_request *req[I915_NUM_RINGS]; | |
3190 | int ret, i, n; | |
41c52415 | 3191 | |
b4716185 | 3192 | if (!obj->active) |
2911a35b BW |
3193 | return 0; |
3194 | ||
b4716185 CW |
3195 | if (to == NULL) |
3196 | return i915_gem_object_wait_rendering(obj, readonly); | |
2911a35b | 3197 | |
b4716185 CW |
3198 | n = 0; |
3199 | if (readonly) { | |
3200 | if (obj->last_write_req) | |
3201 | req[n++] = obj->last_write_req; | |
3202 | } else { | |
3203 | for (i = 0; i < I915_NUM_RINGS; i++) | |
3204 | if (obj->last_read_req[i]) | |
3205 | req[n++] = obj->last_read_req[i]; | |
3206 | } | |
3207 | for (i = 0; i < n; i++) { | |
91af127f | 3208 | ret = __i915_gem_object_sync(obj, to, req[i], to_req); |
b4716185 CW |
3209 | if (ret) |
3210 | return ret; | |
3211 | } | |
2911a35b | 3212 | |
b4716185 | 3213 | return 0; |
2911a35b BW |
3214 | } |
3215 | ||
b5ffc9bc CW |
3216 | static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj) |
3217 | { | |
3218 | u32 old_write_domain, old_read_domains; | |
3219 | ||
b5ffc9bc CW |
3220 | /* Force a pagefault for domain tracking on next user access */ |
3221 | i915_gem_release_mmap(obj); | |
3222 | ||
b97c3d9c KP |
3223 | if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) |
3224 | return; | |
3225 | ||
97c809fd CW |
3226 | /* Wait for any direct GTT access to complete */ |
3227 | mb(); | |
3228 | ||
b5ffc9bc CW |
3229 | old_read_domains = obj->base.read_domains; |
3230 | old_write_domain = obj->base.write_domain; | |
3231 | ||
3232 | obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT; | |
3233 | obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT; | |
3234 | ||
3235 | trace_i915_gem_object_change_domain(obj, | |
3236 | old_read_domains, | |
3237 | old_write_domain); | |
3238 | } | |
3239 | ||
07fe0b12 | 3240 | int i915_vma_unbind(struct i915_vma *vma) |
673a394b | 3241 | { |
07fe0b12 | 3242 | struct drm_i915_gem_object *obj = vma->obj; |
3e31c6c0 | 3243 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
43e28f09 | 3244 | int ret; |
673a394b | 3245 | |
07fe0b12 | 3246 | if (list_empty(&vma->vma_link)) |
673a394b EA |
3247 | return 0; |
3248 | ||
0ff501cb DV |
3249 | if (!drm_mm_node_allocated(&vma->node)) { |
3250 | i915_gem_vma_destroy(vma); | |
0ff501cb DV |
3251 | return 0; |
3252 | } | |
433544bd | 3253 | |
d7f46fc4 | 3254 | if (vma->pin_count) |
31d8d651 | 3255 | return -EBUSY; |
673a394b | 3256 | |
c4670ad0 CW |
3257 | BUG_ON(obj->pages == NULL); |
3258 | ||
2e2f351d | 3259 | ret = i915_gem_object_wait_rendering(obj, false); |
1488fc08 | 3260 | if (ret) |
a8198eea CW |
3261 | return ret; |
3262 | /* Continue on if we fail due to EIO, the GPU is hung so we | |
3263 | * should be safe and we need to cleanup or else we might | |
3264 | * cause memory corruption through use-after-free. | |
3265 | */ | |
3266 | ||
fe14d5f4 TU |
3267 | if (i915_is_ggtt(vma->vm) && |
3268 | vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) { | |
8b1bc9b4 | 3269 | i915_gem_object_finish_gtt(obj); |
5323fd04 | 3270 | |
8b1bc9b4 DV |
3271 | /* release the fence reg _after_ flushing */ |
3272 | ret = i915_gem_object_put_fence(obj); | |
3273 | if (ret) | |
3274 | return ret; | |
3275 | } | |
96b47b65 | 3276 | |
07fe0b12 | 3277 | trace_i915_vma_unbind(vma); |
db53a302 | 3278 | |
777dc5bb | 3279 | vma->vm->unbind_vma(vma); |
5e562f1d | 3280 | vma->bound = 0; |
6f65e29a | 3281 | |
64bf9303 | 3282 | list_del_init(&vma->mm_list); |
fe14d5f4 TU |
3283 | if (i915_is_ggtt(vma->vm)) { |
3284 | if (vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) { | |
3285 | obj->map_and_fenceable = false; | |
3286 | } else if (vma->ggtt_view.pages) { | |
3287 | sg_free_table(vma->ggtt_view.pages); | |
3288 | kfree(vma->ggtt_view.pages); | |
fe14d5f4 | 3289 | } |
016a65a3 | 3290 | vma->ggtt_view.pages = NULL; |
fe14d5f4 | 3291 | } |
673a394b | 3292 | |
2f633156 BW |
3293 | drm_mm_remove_node(&vma->node); |
3294 | i915_gem_vma_destroy(vma); | |
3295 | ||
3296 | /* Since the unbound list is global, only move to that list if | |
b93dab6e | 3297 | * no more VMAs exist. */ |
e2273302 | 3298 | if (list_empty(&obj->vma_list)) |
2f633156 | 3299 | list_move_tail(&obj->global_list, &dev_priv->mm.unbound_list); |
673a394b | 3300 | |
70903c3b CW |
3301 | /* And finally now the object is completely decoupled from this vma, |
3302 | * we can drop its hold on the backing storage and allow it to be | |
3303 | * reaped by the shrinker. | |
3304 | */ | |
3305 | i915_gem_object_unpin_pages(obj); | |
3306 | ||
88241785 | 3307 | return 0; |
54cf91dc CW |
3308 | } |
3309 | ||
b2da9fe5 | 3310 | int i915_gpu_idle(struct drm_device *dev) |
4df2faf4 | 3311 | { |
3e31c6c0 | 3312 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4872ba6 | 3313 | struct intel_engine_cs *ring; |
1ec14ad3 | 3314 | int ret, i; |
4df2faf4 | 3315 | |
4df2faf4 | 3316 | /* Flush everything onto the inactive list. */ |
b4519513 | 3317 | for_each_ring(ring, dev_priv, i) { |
ecdb5fd8 | 3318 | if (!i915.enable_execlists) { |
73cfa865 JH |
3319 | struct drm_i915_gem_request *req; |
3320 | ||
3321 | ret = i915_gem_request_alloc(ring, ring->default_context, &req); | |
ecdb5fd8 TD |
3322 | if (ret) |
3323 | return ret; | |
73cfa865 | 3324 | |
ba01cc93 | 3325 | ret = i915_switch_context(req); |
73cfa865 JH |
3326 | if (ret) { |
3327 | i915_gem_request_cancel(req); | |
3328 | return ret; | |
3329 | } | |
3330 | ||
75289874 | 3331 | i915_add_request_no_flush(req); |
ecdb5fd8 | 3332 | } |
b6c7488d | 3333 | |
3e960501 | 3334 | ret = intel_ring_idle(ring); |
1ec14ad3 CW |
3335 | if (ret) |
3336 | return ret; | |
3337 | } | |
4df2faf4 | 3338 | |
b4716185 | 3339 | WARN_ON(i915_verify_lists(dev)); |
8a1a49f9 | 3340 | return 0; |
4df2faf4 DV |
3341 | } |
3342 | ||
9ce079e4 CW |
3343 | static void i965_write_fence_reg(struct drm_device *dev, int reg, |
3344 | struct drm_i915_gem_object *obj) | |
de151cf6 | 3345 | { |
3e31c6c0 | 3346 | struct drm_i915_private *dev_priv = dev->dev_private; |
56c844e5 ID |
3347 | int fence_reg; |
3348 | int fence_pitch_shift; | |
de151cf6 | 3349 | |
56c844e5 ID |
3350 | if (INTEL_INFO(dev)->gen >= 6) { |
3351 | fence_reg = FENCE_REG_SANDYBRIDGE_0; | |
3352 | fence_pitch_shift = SANDYBRIDGE_FENCE_PITCH_SHIFT; | |
3353 | } else { | |
3354 | fence_reg = FENCE_REG_965_0; | |
3355 | fence_pitch_shift = I965_FENCE_PITCH_SHIFT; | |
3356 | } | |
3357 | ||
d18b9619 CW |
3358 | fence_reg += reg * 8; |
3359 | ||
3360 | /* To w/a incoherency with non-atomic 64-bit register updates, | |
3361 | * we split the 64-bit update into two 32-bit writes. In order | |
3362 | * for a partial fence not to be evaluated between writes, we | |
3363 | * precede the update with write to turn off the fence register, | |
3364 | * and only enable the fence as the last step. | |
3365 | * | |
3366 | * For extra levels of paranoia, we make sure each step lands | |
3367 | * before applying the next step. | |
3368 | */ | |
3369 | I915_WRITE(fence_reg, 0); | |
3370 | POSTING_READ(fence_reg); | |
3371 | ||
9ce079e4 | 3372 | if (obj) { |
f343c5f6 | 3373 | u32 size = i915_gem_obj_ggtt_size(obj); |
d18b9619 | 3374 | uint64_t val; |
de151cf6 | 3375 | |
af1a7301 BP |
3376 | /* Adjust fence size to match tiled area */ |
3377 | if (obj->tiling_mode != I915_TILING_NONE) { | |
3378 | uint32_t row_size = obj->stride * | |
3379 | (obj->tiling_mode == I915_TILING_Y ? 32 : 8); | |
3380 | size = (size / row_size) * row_size; | |
3381 | } | |
3382 | ||
f343c5f6 | 3383 | val = (uint64_t)((i915_gem_obj_ggtt_offset(obj) + size - 4096) & |
9ce079e4 | 3384 | 0xfffff000) << 32; |
f343c5f6 | 3385 | val |= i915_gem_obj_ggtt_offset(obj) & 0xfffff000; |
56c844e5 | 3386 | val |= (uint64_t)((obj->stride / 128) - 1) << fence_pitch_shift; |
9ce079e4 CW |
3387 | if (obj->tiling_mode == I915_TILING_Y) |
3388 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; | |
3389 | val |= I965_FENCE_REG_VALID; | |
c6642782 | 3390 | |
d18b9619 CW |
3391 | I915_WRITE(fence_reg + 4, val >> 32); |
3392 | POSTING_READ(fence_reg + 4); | |
3393 | ||
3394 | I915_WRITE(fence_reg + 0, val); | |
3395 | POSTING_READ(fence_reg); | |
3396 | } else { | |
3397 | I915_WRITE(fence_reg + 4, 0); | |
3398 | POSTING_READ(fence_reg + 4); | |
3399 | } | |
de151cf6 JB |
3400 | } |
3401 | ||
9ce079e4 CW |
3402 | static void i915_write_fence_reg(struct drm_device *dev, int reg, |
3403 | struct drm_i915_gem_object *obj) | |
de151cf6 | 3404 | { |
3e31c6c0 | 3405 | struct drm_i915_private *dev_priv = dev->dev_private; |
9ce079e4 | 3406 | u32 val; |
de151cf6 | 3407 | |
9ce079e4 | 3408 | if (obj) { |
f343c5f6 | 3409 | u32 size = i915_gem_obj_ggtt_size(obj); |
9ce079e4 CW |
3410 | int pitch_val; |
3411 | int tile_width; | |
c6642782 | 3412 | |
f343c5f6 | 3413 | WARN((i915_gem_obj_ggtt_offset(obj) & ~I915_FENCE_START_MASK) || |
9ce079e4 | 3414 | (size & -size) != size || |
f343c5f6 BW |
3415 | (i915_gem_obj_ggtt_offset(obj) & (size - 1)), |
3416 | "object 0x%08lx [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n", | |
3417 | i915_gem_obj_ggtt_offset(obj), obj->map_and_fenceable, size); | |
c6642782 | 3418 | |
9ce079e4 CW |
3419 | if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev)) |
3420 | tile_width = 128; | |
3421 | else | |
3422 | tile_width = 512; | |
3423 | ||
3424 | /* Note: pitch better be a power of two tile widths */ | |
3425 | pitch_val = obj->stride / tile_width; | |
3426 | pitch_val = ffs(pitch_val) - 1; | |
3427 | ||
f343c5f6 | 3428 | val = i915_gem_obj_ggtt_offset(obj); |
9ce079e4 CW |
3429 | if (obj->tiling_mode == I915_TILING_Y) |
3430 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
3431 | val |= I915_FENCE_SIZE_BITS(size); | |
3432 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
3433 | val |= I830_FENCE_REG_VALID; | |
3434 | } else | |
3435 | val = 0; | |
3436 | ||
3437 | if (reg < 8) | |
3438 | reg = FENCE_REG_830_0 + reg * 4; | |
3439 | else | |
3440 | reg = FENCE_REG_945_8 + (reg - 8) * 4; | |
3441 | ||
3442 | I915_WRITE(reg, val); | |
3443 | POSTING_READ(reg); | |
de151cf6 JB |
3444 | } |
3445 | ||
9ce079e4 CW |
3446 | static void i830_write_fence_reg(struct drm_device *dev, int reg, |
3447 | struct drm_i915_gem_object *obj) | |
de151cf6 | 3448 | { |
3e31c6c0 | 3449 | struct drm_i915_private *dev_priv = dev->dev_private; |
de151cf6 | 3450 | uint32_t val; |
de151cf6 | 3451 | |
9ce079e4 | 3452 | if (obj) { |
f343c5f6 | 3453 | u32 size = i915_gem_obj_ggtt_size(obj); |
9ce079e4 | 3454 | uint32_t pitch_val; |
de151cf6 | 3455 | |
f343c5f6 | 3456 | WARN((i915_gem_obj_ggtt_offset(obj) & ~I830_FENCE_START_MASK) || |
9ce079e4 | 3457 | (size & -size) != size || |
f343c5f6 BW |
3458 | (i915_gem_obj_ggtt_offset(obj) & (size - 1)), |
3459 | "object 0x%08lx not 512K or pot-size 0x%08x aligned\n", | |
3460 | i915_gem_obj_ggtt_offset(obj), size); | |
e76a16de | 3461 | |
9ce079e4 CW |
3462 | pitch_val = obj->stride / 128; |
3463 | pitch_val = ffs(pitch_val) - 1; | |
de151cf6 | 3464 | |
f343c5f6 | 3465 | val = i915_gem_obj_ggtt_offset(obj); |
9ce079e4 CW |
3466 | if (obj->tiling_mode == I915_TILING_Y) |
3467 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
3468 | val |= I830_FENCE_SIZE_BITS(size); | |
3469 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
3470 | val |= I830_FENCE_REG_VALID; | |
3471 | } else | |
3472 | val = 0; | |
c6642782 | 3473 | |
9ce079e4 CW |
3474 | I915_WRITE(FENCE_REG_830_0 + reg * 4, val); |
3475 | POSTING_READ(FENCE_REG_830_0 + reg * 4); | |
3476 | } | |
3477 | ||
d0a57789 CW |
3478 | inline static bool i915_gem_object_needs_mb(struct drm_i915_gem_object *obj) |
3479 | { | |
3480 | return obj && obj->base.read_domains & I915_GEM_DOMAIN_GTT; | |
3481 | } | |
3482 | ||
9ce079e4 CW |
3483 | static void i915_gem_write_fence(struct drm_device *dev, int reg, |
3484 | struct drm_i915_gem_object *obj) | |
3485 | { | |
d0a57789 CW |
3486 | struct drm_i915_private *dev_priv = dev->dev_private; |
3487 | ||
3488 | /* Ensure that all CPU reads are completed before installing a fence | |
3489 | * and all writes before removing the fence. | |
3490 | */ | |
3491 | if (i915_gem_object_needs_mb(dev_priv->fence_regs[reg].obj)) | |
3492 | mb(); | |
3493 | ||
94a335db DV |
3494 | WARN(obj && (!obj->stride || !obj->tiling_mode), |
3495 | "bogus fence setup with stride: 0x%x, tiling mode: %i\n", | |
3496 | obj->stride, obj->tiling_mode); | |
3497 | ||
ce38ab05 RV |
3498 | if (IS_GEN2(dev)) |
3499 | i830_write_fence_reg(dev, reg, obj); | |
3500 | else if (IS_GEN3(dev)) | |
3501 | i915_write_fence_reg(dev, reg, obj); | |
3502 | else if (INTEL_INFO(dev)->gen >= 4) | |
3503 | i965_write_fence_reg(dev, reg, obj); | |
d0a57789 CW |
3504 | |
3505 | /* And similarly be paranoid that no direct access to this region | |
3506 | * is reordered to before the fence is installed. | |
3507 | */ | |
3508 | if (i915_gem_object_needs_mb(obj)) | |
3509 | mb(); | |
de151cf6 JB |
3510 | } |
3511 | ||
61050808 CW |
3512 | static inline int fence_number(struct drm_i915_private *dev_priv, |
3513 | struct drm_i915_fence_reg *fence) | |
3514 | { | |
3515 | return fence - dev_priv->fence_regs; | |
3516 | } | |
3517 | ||
3518 | static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, | |
3519 | struct drm_i915_fence_reg *fence, | |
3520 | bool enable) | |
3521 | { | |
2dc8aae0 | 3522 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
46a0b638 CW |
3523 | int reg = fence_number(dev_priv, fence); |
3524 | ||
3525 | i915_gem_write_fence(obj->base.dev, reg, enable ? obj : NULL); | |
61050808 CW |
3526 | |
3527 | if (enable) { | |
46a0b638 | 3528 | obj->fence_reg = reg; |
61050808 CW |
3529 | fence->obj = obj; |
3530 | list_move_tail(&fence->lru_list, &dev_priv->mm.fence_list); | |
3531 | } else { | |
3532 | obj->fence_reg = I915_FENCE_REG_NONE; | |
3533 | fence->obj = NULL; | |
3534 | list_del_init(&fence->lru_list); | |
3535 | } | |
94a335db | 3536 | obj->fence_dirty = false; |
61050808 CW |
3537 | } |
3538 | ||
d9e86c0e | 3539 | static int |
d0a57789 | 3540 | i915_gem_object_wait_fence(struct drm_i915_gem_object *obj) |
d9e86c0e | 3541 | { |
97b2a6a1 | 3542 | if (obj->last_fenced_req) { |
a4b3a571 | 3543 | int ret = i915_wait_request(obj->last_fenced_req); |
18991845 CW |
3544 | if (ret) |
3545 | return ret; | |
d9e86c0e | 3546 | |
97b2a6a1 | 3547 | i915_gem_request_assign(&obj->last_fenced_req, NULL); |
d9e86c0e CW |
3548 | } |
3549 | ||
3550 | return 0; | |
3551 | } | |
3552 | ||
3553 | int | |
3554 | i915_gem_object_put_fence(struct drm_i915_gem_object *obj) | |
3555 | { | |
61050808 | 3556 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
f9c513e9 | 3557 | struct drm_i915_fence_reg *fence; |
d9e86c0e CW |
3558 | int ret; |
3559 | ||
d0a57789 | 3560 | ret = i915_gem_object_wait_fence(obj); |
d9e86c0e CW |
3561 | if (ret) |
3562 | return ret; | |
3563 | ||
61050808 CW |
3564 | if (obj->fence_reg == I915_FENCE_REG_NONE) |
3565 | return 0; | |
d9e86c0e | 3566 | |
f9c513e9 CW |
3567 | fence = &dev_priv->fence_regs[obj->fence_reg]; |
3568 | ||
aff10b30 DV |
3569 | if (WARN_ON(fence->pin_count)) |
3570 | return -EBUSY; | |
3571 | ||
61050808 | 3572 | i915_gem_object_fence_lost(obj); |
f9c513e9 | 3573 | i915_gem_object_update_fence(obj, fence, false); |
d9e86c0e CW |
3574 | |
3575 | return 0; | |
3576 | } | |
3577 | ||
3578 | static struct drm_i915_fence_reg * | |
a360bb1a | 3579 | i915_find_fence_reg(struct drm_device *dev) |
ae3db24a | 3580 | { |
ae3db24a | 3581 | struct drm_i915_private *dev_priv = dev->dev_private; |
8fe301ad | 3582 | struct drm_i915_fence_reg *reg, *avail; |
d9e86c0e | 3583 | int i; |
ae3db24a DV |
3584 | |
3585 | /* First try to find a free reg */ | |
d9e86c0e | 3586 | avail = NULL; |
ae3db24a DV |
3587 | for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { |
3588 | reg = &dev_priv->fence_regs[i]; | |
3589 | if (!reg->obj) | |
d9e86c0e | 3590 | return reg; |
ae3db24a | 3591 | |
1690e1eb | 3592 | if (!reg->pin_count) |
d9e86c0e | 3593 | avail = reg; |
ae3db24a DV |
3594 | } |
3595 | ||
d9e86c0e | 3596 | if (avail == NULL) |
5dce5b93 | 3597 | goto deadlock; |
ae3db24a DV |
3598 | |
3599 | /* None available, try to steal one or wait for a user to finish */ | |
d9e86c0e | 3600 | list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) { |
1690e1eb | 3601 | if (reg->pin_count) |
ae3db24a DV |
3602 | continue; |
3603 | ||
8fe301ad | 3604 | return reg; |
ae3db24a DV |
3605 | } |
3606 | ||
5dce5b93 CW |
3607 | deadlock: |
3608 | /* Wait for completion of pending flips which consume fences */ | |
3609 | if (intel_has_pending_fb_unpin(dev)) | |
3610 | return ERR_PTR(-EAGAIN); | |
3611 | ||
3612 | return ERR_PTR(-EDEADLK); | |
ae3db24a DV |
3613 | } |
3614 | ||
de151cf6 | 3615 | /** |
9a5a53b3 | 3616 | * i915_gem_object_get_fence - set up fencing for an object |
de151cf6 JB |
3617 | * @obj: object to map through a fence reg |
3618 | * | |
3619 | * When mapping objects through the GTT, userspace wants to be able to write | |
3620 | * to them without having to worry about swizzling if the object is tiled. | |
de151cf6 JB |
3621 | * This function walks the fence regs looking for a free one for @obj, |
3622 | * stealing one if it can't find any. | |
3623 | * | |
3624 | * It then sets up the reg based on the object's properties: address, pitch | |
3625 | * and tiling format. | |
9a5a53b3 CW |
3626 | * |
3627 | * For an untiled surface, this removes any existing fence. | |
de151cf6 | 3628 | */ |
8c4b8c3f | 3629 | int |
06d98131 | 3630 | i915_gem_object_get_fence(struct drm_i915_gem_object *obj) |
de151cf6 | 3631 | { |
05394f39 | 3632 | struct drm_device *dev = obj->base.dev; |
79e53945 | 3633 | struct drm_i915_private *dev_priv = dev->dev_private; |
14415745 | 3634 | bool enable = obj->tiling_mode != I915_TILING_NONE; |
d9e86c0e | 3635 | struct drm_i915_fence_reg *reg; |
ae3db24a | 3636 | int ret; |
de151cf6 | 3637 | |
14415745 CW |
3638 | /* Have we updated the tiling parameters upon the object and so |
3639 | * will need to serialise the write to the associated fence register? | |
3640 | */ | |
5d82e3e6 | 3641 | if (obj->fence_dirty) { |
d0a57789 | 3642 | ret = i915_gem_object_wait_fence(obj); |
14415745 CW |
3643 | if (ret) |
3644 | return ret; | |
3645 | } | |
9a5a53b3 | 3646 | |
d9e86c0e | 3647 | /* Just update our place in the LRU if our fence is getting reused. */ |
05394f39 CW |
3648 | if (obj->fence_reg != I915_FENCE_REG_NONE) { |
3649 | reg = &dev_priv->fence_regs[obj->fence_reg]; | |
5d82e3e6 | 3650 | if (!obj->fence_dirty) { |
14415745 CW |
3651 | list_move_tail(®->lru_list, |
3652 | &dev_priv->mm.fence_list); | |
3653 | return 0; | |
3654 | } | |
3655 | } else if (enable) { | |
e6a84468 CW |
3656 | if (WARN_ON(!obj->map_and_fenceable)) |
3657 | return -EINVAL; | |
3658 | ||
14415745 | 3659 | reg = i915_find_fence_reg(dev); |
5dce5b93 CW |
3660 | if (IS_ERR(reg)) |
3661 | return PTR_ERR(reg); | |
d9e86c0e | 3662 | |
14415745 CW |
3663 | if (reg->obj) { |
3664 | struct drm_i915_gem_object *old = reg->obj; | |
3665 | ||
d0a57789 | 3666 | ret = i915_gem_object_wait_fence(old); |
29c5a587 CW |
3667 | if (ret) |
3668 | return ret; | |
3669 | ||
14415745 | 3670 | i915_gem_object_fence_lost(old); |
29c5a587 | 3671 | } |
14415745 | 3672 | } else |
a09ba7fa | 3673 | return 0; |
a09ba7fa | 3674 | |
14415745 | 3675 | i915_gem_object_update_fence(obj, reg, enable); |
14415745 | 3676 | |
9ce079e4 | 3677 | return 0; |
de151cf6 JB |
3678 | } |
3679 | ||
4144f9b5 | 3680 | static bool i915_gem_valid_gtt_space(struct i915_vma *vma, |
42d6ab48 CW |
3681 | unsigned long cache_level) |
3682 | { | |
4144f9b5 | 3683 | struct drm_mm_node *gtt_space = &vma->node; |
42d6ab48 CW |
3684 | struct drm_mm_node *other; |
3685 | ||
4144f9b5 CW |
3686 | /* |
3687 | * On some machines we have to be careful when putting differing types | |
3688 | * of snoopable memory together to avoid the prefetcher crossing memory | |
3689 | * domains and dying. During vm initialisation, we decide whether or not | |
3690 | * these constraints apply and set the drm_mm.color_adjust | |
3691 | * appropriately. | |
42d6ab48 | 3692 | */ |
4144f9b5 | 3693 | if (vma->vm->mm.color_adjust == NULL) |
42d6ab48 CW |
3694 | return true; |
3695 | ||
c6cfb325 | 3696 | if (!drm_mm_node_allocated(gtt_space)) |
42d6ab48 CW |
3697 | return true; |
3698 | ||
3699 | if (list_empty(>t_space->node_list)) | |
3700 | return true; | |
3701 | ||
3702 | other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list); | |
3703 | if (other->allocated && !other->hole_follows && other->color != cache_level) | |
3704 | return false; | |
3705 | ||
3706 | other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list); | |
3707 | if (other->allocated && !gtt_space->hole_follows && other->color != cache_level) | |
3708 | return false; | |
3709 | ||
3710 | return true; | |
3711 | } | |
3712 | ||
673a394b | 3713 | /** |
91e6711e JL |
3714 | * Finds free space in the GTT aperture and binds the object or a view of it |
3715 | * there. | |
673a394b | 3716 | */ |
262de145 | 3717 | static struct i915_vma * |
07fe0b12 BW |
3718 | i915_gem_object_bind_to_vm(struct drm_i915_gem_object *obj, |
3719 | struct i915_address_space *vm, | |
ec7adb6e | 3720 | const struct i915_ggtt_view *ggtt_view, |
07fe0b12 | 3721 | unsigned alignment, |
ec7adb6e | 3722 | uint64_t flags) |
673a394b | 3723 | { |
05394f39 | 3724 | struct drm_device *dev = obj->base.dev; |
3e31c6c0 | 3725 | struct drm_i915_private *dev_priv = dev->dev_private; |
5e783301 | 3726 | u32 size, fence_size, fence_alignment, unfenced_alignment; |
c44ef60e | 3727 | u64 start = |
d23db88c | 3728 | flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0; |
c44ef60e | 3729 | u64 end = |
1ec9e26d | 3730 | flags & PIN_MAPPABLE ? dev_priv->gtt.mappable_end : vm->total; |
2f633156 | 3731 | struct i915_vma *vma; |
07f73f69 | 3732 | int ret; |
673a394b | 3733 | |
91e6711e JL |
3734 | if (i915_is_ggtt(vm)) { |
3735 | u32 view_size; | |
3736 | ||
3737 | if (WARN_ON(!ggtt_view)) | |
3738 | return ERR_PTR(-EINVAL); | |
ec7adb6e | 3739 | |
91e6711e JL |
3740 | view_size = i915_ggtt_view_size(obj, ggtt_view); |
3741 | ||
3742 | fence_size = i915_gem_get_gtt_size(dev, | |
3743 | view_size, | |
3744 | obj->tiling_mode); | |
3745 | fence_alignment = i915_gem_get_gtt_alignment(dev, | |
3746 | view_size, | |
3747 | obj->tiling_mode, | |
3748 | true); | |
3749 | unfenced_alignment = i915_gem_get_gtt_alignment(dev, | |
3750 | view_size, | |
3751 | obj->tiling_mode, | |
3752 | false); | |
3753 | size = flags & PIN_MAPPABLE ? fence_size : view_size; | |
3754 | } else { | |
3755 | fence_size = i915_gem_get_gtt_size(dev, | |
3756 | obj->base.size, | |
3757 | obj->tiling_mode); | |
3758 | fence_alignment = i915_gem_get_gtt_alignment(dev, | |
3759 | obj->base.size, | |
3760 | obj->tiling_mode, | |
3761 | true); | |
3762 | unfenced_alignment = | |
3763 | i915_gem_get_gtt_alignment(dev, | |
3764 | obj->base.size, | |
3765 | obj->tiling_mode, | |
3766 | false); | |
3767 | size = flags & PIN_MAPPABLE ? fence_size : obj->base.size; | |
3768 | } | |
a00b10c3 | 3769 | |
673a394b | 3770 | if (alignment == 0) |
1ec9e26d | 3771 | alignment = flags & PIN_MAPPABLE ? fence_alignment : |
5e783301 | 3772 | unfenced_alignment; |
1ec9e26d | 3773 | if (flags & PIN_MAPPABLE && alignment & (fence_alignment - 1)) { |
91e6711e JL |
3774 | DRM_DEBUG("Invalid object (view type=%u) alignment requested %u\n", |
3775 | ggtt_view ? ggtt_view->type : 0, | |
3776 | alignment); | |
262de145 | 3777 | return ERR_PTR(-EINVAL); |
673a394b EA |
3778 | } |
3779 | ||
91e6711e JL |
3780 | /* If binding the object/GGTT view requires more space than the entire |
3781 | * aperture has, reject it early before evicting everything in a vain | |
3782 | * attempt to find space. | |
654fc607 | 3783 | */ |
91e6711e | 3784 | if (size > end) { |
c44ef60e | 3785 | DRM_DEBUG("Attempting to bind an object (view type=%u) larger than the aperture: size=%u > %s aperture=%llu\n", |
91e6711e JL |
3786 | ggtt_view ? ggtt_view->type : 0, |
3787 | size, | |
1ec9e26d | 3788 | flags & PIN_MAPPABLE ? "mappable" : "total", |
d23db88c | 3789 | end); |
262de145 | 3790 | return ERR_PTR(-E2BIG); |
654fc607 CW |
3791 | } |
3792 | ||
37e680a1 | 3793 | ret = i915_gem_object_get_pages(obj); |
6c085a72 | 3794 | if (ret) |
262de145 | 3795 | return ERR_PTR(ret); |
6c085a72 | 3796 | |
fbdda6fb CW |
3797 | i915_gem_object_pin_pages(obj); |
3798 | ||
ec7adb6e JL |
3799 | vma = ggtt_view ? i915_gem_obj_lookup_or_create_ggtt_vma(obj, ggtt_view) : |
3800 | i915_gem_obj_lookup_or_create_vma(obj, vm); | |
3801 | ||
262de145 | 3802 | if (IS_ERR(vma)) |
bc6bc15b | 3803 | goto err_unpin; |
2f633156 | 3804 | |
0a9ae0d7 | 3805 | search_free: |
07fe0b12 | 3806 | ret = drm_mm_insert_node_in_range_generic(&vm->mm, &vma->node, |
0a9ae0d7 | 3807 | size, alignment, |
d23db88c CW |
3808 | obj->cache_level, |
3809 | start, end, | |
62347f9e LK |
3810 | DRM_MM_SEARCH_DEFAULT, |
3811 | DRM_MM_CREATE_DEFAULT); | |
dc9dd7a2 | 3812 | if (ret) { |
f6cd1f15 | 3813 | ret = i915_gem_evict_something(dev, vm, size, alignment, |
d23db88c CW |
3814 | obj->cache_level, |
3815 | start, end, | |
3816 | flags); | |
dc9dd7a2 CW |
3817 | if (ret == 0) |
3818 | goto search_free; | |
9731129c | 3819 | |
bc6bc15b | 3820 | goto err_free_vma; |
673a394b | 3821 | } |
4144f9b5 | 3822 | if (WARN_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level))) { |
2f633156 | 3823 | ret = -EINVAL; |
bc6bc15b | 3824 | goto err_remove_node; |
673a394b EA |
3825 | } |
3826 | ||
fe14d5f4 | 3827 | trace_i915_vma_bind(vma, flags); |
0875546c | 3828 | ret = i915_vma_bind(vma, obj->cache_level, flags); |
fe14d5f4 | 3829 | if (ret) |
e2273302 | 3830 | goto err_remove_node; |
fe14d5f4 | 3831 | |
35c20a60 | 3832 | list_move_tail(&obj->global_list, &dev_priv->mm.bound_list); |
ca191b13 | 3833 | list_add_tail(&vma->mm_list, &vm->inactive_list); |
bf1a1092 | 3834 | |
262de145 | 3835 | return vma; |
2f633156 | 3836 | |
bc6bc15b | 3837 | err_remove_node: |
6286ef9b | 3838 | drm_mm_remove_node(&vma->node); |
bc6bc15b | 3839 | err_free_vma: |
2f633156 | 3840 | i915_gem_vma_destroy(vma); |
262de145 | 3841 | vma = ERR_PTR(ret); |
bc6bc15b | 3842 | err_unpin: |
2f633156 | 3843 | i915_gem_object_unpin_pages(obj); |
262de145 | 3844 | return vma; |
673a394b EA |
3845 | } |
3846 | ||
000433b6 | 3847 | bool |
2c22569b CW |
3848 | i915_gem_clflush_object(struct drm_i915_gem_object *obj, |
3849 | bool force) | |
673a394b | 3850 | { |
673a394b EA |
3851 | /* If we don't have a page list set up, then we're not pinned |
3852 | * to GPU, and we can ignore the cache flush because it'll happen | |
3853 | * again at bind time. | |
3854 | */ | |
05394f39 | 3855 | if (obj->pages == NULL) |
000433b6 | 3856 | return false; |
673a394b | 3857 | |
769ce464 ID |
3858 | /* |
3859 | * Stolen memory is always coherent with the GPU as it is explicitly | |
3860 | * marked as wc by the system, or the system is cache-coherent. | |
3861 | */ | |
6a2c4232 | 3862 | if (obj->stolen || obj->phys_handle) |
000433b6 | 3863 | return false; |
769ce464 | 3864 | |
9c23f7fc CW |
3865 | /* If the GPU is snooping the contents of the CPU cache, |
3866 | * we do not need to manually clear the CPU cache lines. However, | |
3867 | * the caches are only snooped when the render cache is | |
3868 | * flushed/invalidated. As we always have to emit invalidations | |
3869 | * and flushes when moving into and out of the RENDER domain, correct | |
3870 | * snooping behaviour occurs naturally as the result of our domain | |
3871 | * tracking. | |
3872 | */ | |
0f71979a CW |
3873 | if (!force && cpu_cache_is_coherent(obj->base.dev, obj->cache_level)) { |
3874 | obj->cache_dirty = true; | |
000433b6 | 3875 | return false; |
0f71979a | 3876 | } |
9c23f7fc | 3877 | |
1c5d22f7 | 3878 | trace_i915_gem_object_clflush(obj); |
9da3da66 | 3879 | drm_clflush_sg(obj->pages); |
0f71979a | 3880 | obj->cache_dirty = false; |
000433b6 CW |
3881 | |
3882 | return true; | |
e47c68e9 EA |
3883 | } |
3884 | ||
3885 | /** Flushes the GTT write domain for the object if it's dirty. */ | |
3886 | static void | |
05394f39 | 3887 | i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj) |
e47c68e9 | 3888 | { |
1c5d22f7 CW |
3889 | uint32_t old_write_domain; |
3890 | ||
05394f39 | 3891 | if (obj->base.write_domain != I915_GEM_DOMAIN_GTT) |
e47c68e9 EA |
3892 | return; |
3893 | ||
63256ec5 | 3894 | /* No actual flushing is required for the GTT write domain. Writes |
e47c68e9 EA |
3895 | * to it immediately go to main memory as far as we know, so there's |
3896 | * no chipset flush. It also doesn't land in render cache. | |
63256ec5 CW |
3897 | * |
3898 | * However, we do have to enforce the order so that all writes through | |
3899 | * the GTT land before any writes to the device, such as updates to | |
3900 | * the GATT itself. | |
e47c68e9 | 3901 | */ |
63256ec5 CW |
3902 | wmb(); |
3903 | ||
05394f39 CW |
3904 | old_write_domain = obj->base.write_domain; |
3905 | obj->base.write_domain = 0; | |
1c5d22f7 | 3906 | |
de152b62 | 3907 | intel_fb_obj_flush(obj, false, ORIGIN_GTT); |
f99d7069 | 3908 | |
1c5d22f7 | 3909 | trace_i915_gem_object_change_domain(obj, |
05394f39 | 3910 | obj->base.read_domains, |
1c5d22f7 | 3911 | old_write_domain); |
e47c68e9 EA |
3912 | } |
3913 | ||
3914 | /** Flushes the CPU write domain for the object if it's dirty. */ | |
3915 | static void | |
e62b59e4 | 3916 | i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj) |
e47c68e9 | 3917 | { |
1c5d22f7 | 3918 | uint32_t old_write_domain; |
e47c68e9 | 3919 | |
05394f39 | 3920 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) |
e47c68e9 EA |
3921 | return; |
3922 | ||
e62b59e4 | 3923 | if (i915_gem_clflush_object(obj, obj->pin_display)) |
000433b6 CW |
3924 | i915_gem_chipset_flush(obj->base.dev); |
3925 | ||
05394f39 CW |
3926 | old_write_domain = obj->base.write_domain; |
3927 | obj->base.write_domain = 0; | |
1c5d22f7 | 3928 | |
de152b62 | 3929 | intel_fb_obj_flush(obj, false, ORIGIN_CPU); |
f99d7069 | 3930 | |
1c5d22f7 | 3931 | trace_i915_gem_object_change_domain(obj, |
05394f39 | 3932 | obj->base.read_domains, |
1c5d22f7 | 3933 | old_write_domain); |
e47c68e9 EA |
3934 | } |
3935 | ||
2ef7eeaa EA |
3936 | /** |
3937 | * Moves a single object to the GTT read, and possibly write domain. | |
3938 | * | |
3939 | * This function returns when the move is complete, including waiting on | |
3940 | * flushes to occur. | |
3941 | */ | |
79e53945 | 3942 | int |
2021746e | 3943 | i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write) |
2ef7eeaa | 3944 | { |
1c5d22f7 | 3945 | uint32_t old_write_domain, old_read_domains; |
43566ded | 3946 | struct i915_vma *vma; |
e47c68e9 | 3947 | int ret; |
2ef7eeaa | 3948 | |
8d7e3de1 CW |
3949 | if (obj->base.write_domain == I915_GEM_DOMAIN_GTT) |
3950 | return 0; | |
3951 | ||
0201f1ec | 3952 | ret = i915_gem_object_wait_rendering(obj, !write); |
88241785 CW |
3953 | if (ret) |
3954 | return ret; | |
3955 | ||
43566ded CW |
3956 | /* Flush and acquire obj->pages so that we are coherent through |
3957 | * direct access in memory with previous cached writes through | |
3958 | * shmemfs and that our cache domain tracking remains valid. | |
3959 | * For example, if the obj->filp was moved to swap without us | |
3960 | * being notified and releasing the pages, we would mistakenly | |
3961 | * continue to assume that the obj remained out of the CPU cached | |
3962 | * domain. | |
3963 | */ | |
3964 | ret = i915_gem_object_get_pages(obj); | |
3965 | if (ret) | |
3966 | return ret; | |
3967 | ||
e62b59e4 | 3968 | i915_gem_object_flush_cpu_write_domain(obj); |
1c5d22f7 | 3969 | |
d0a57789 CW |
3970 | /* Serialise direct access to this object with the barriers for |
3971 | * coherent writes from the GPU, by effectively invalidating the | |
3972 | * GTT domain upon first access. | |
3973 | */ | |
3974 | if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) | |
3975 | mb(); | |
3976 | ||
05394f39 CW |
3977 | old_write_domain = obj->base.write_domain; |
3978 | old_read_domains = obj->base.read_domains; | |
1c5d22f7 | 3979 | |
e47c68e9 EA |
3980 | /* It should now be out of any other write domains, and we can update |
3981 | * the domain values for our changes. | |
3982 | */ | |
05394f39 CW |
3983 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0); |
3984 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; | |
e47c68e9 | 3985 | if (write) { |
05394f39 CW |
3986 | obj->base.read_domains = I915_GEM_DOMAIN_GTT; |
3987 | obj->base.write_domain = I915_GEM_DOMAIN_GTT; | |
3988 | obj->dirty = 1; | |
2ef7eeaa EA |
3989 | } |
3990 | ||
1c5d22f7 CW |
3991 | trace_i915_gem_object_change_domain(obj, |
3992 | old_read_domains, | |
3993 | old_write_domain); | |
3994 | ||
8325a09d | 3995 | /* And bump the LRU for this access */ |
43566ded CW |
3996 | vma = i915_gem_obj_to_ggtt(obj); |
3997 | if (vma && drm_mm_node_allocated(&vma->node) && !obj->active) | |
dc8cd1e7 | 3998 | list_move_tail(&vma->mm_list, |
43566ded | 3999 | &to_i915(obj->base.dev)->gtt.base.inactive_list); |
8325a09d | 4000 | |
e47c68e9 EA |
4001 | return 0; |
4002 | } | |
4003 | ||
e4ffd173 CW |
4004 | int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj, |
4005 | enum i915_cache_level cache_level) | |
4006 | { | |
7bddb01f | 4007 | struct drm_device *dev = obj->base.dev; |
df6f783a | 4008 | struct i915_vma *vma, *next; |
e4ffd173 CW |
4009 | int ret; |
4010 | ||
4011 | if (obj->cache_level == cache_level) | |
4012 | return 0; | |
4013 | ||
d7f46fc4 | 4014 | if (i915_gem_obj_is_pinned(obj)) { |
e4ffd173 CW |
4015 | DRM_DEBUG("can not change the cache level of pinned objects\n"); |
4016 | return -EBUSY; | |
4017 | } | |
4018 | ||
df6f783a | 4019 | list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) { |
4144f9b5 | 4020 | if (!i915_gem_valid_gtt_space(vma, cache_level)) { |
07fe0b12 | 4021 | ret = i915_vma_unbind(vma); |
3089c6f2 BW |
4022 | if (ret) |
4023 | return ret; | |
3089c6f2 | 4024 | } |
42d6ab48 CW |
4025 | } |
4026 | ||
3089c6f2 | 4027 | if (i915_gem_obj_bound_any(obj)) { |
2e2f351d | 4028 | ret = i915_gem_object_wait_rendering(obj, false); |
e4ffd173 CW |
4029 | if (ret) |
4030 | return ret; | |
4031 | ||
4032 | i915_gem_object_finish_gtt(obj); | |
4033 | ||
4034 | /* Before SandyBridge, you could not use tiling or fence | |
4035 | * registers with snooped memory, so relinquish any fences | |
4036 | * currently pointing to our region in the aperture. | |
4037 | */ | |
42d6ab48 | 4038 | if (INTEL_INFO(dev)->gen < 6) { |
e4ffd173 CW |
4039 | ret = i915_gem_object_put_fence(obj); |
4040 | if (ret) | |
4041 | return ret; | |
4042 | } | |
4043 | ||
6f65e29a | 4044 | list_for_each_entry(vma, &obj->vma_list, vma_link) |
fe14d5f4 TU |
4045 | if (drm_mm_node_allocated(&vma->node)) { |
4046 | ret = i915_vma_bind(vma, cache_level, | |
0875546c | 4047 | PIN_UPDATE); |
fe14d5f4 TU |
4048 | if (ret) |
4049 | return ret; | |
4050 | } | |
e4ffd173 CW |
4051 | } |
4052 | ||
2c22569b CW |
4053 | list_for_each_entry(vma, &obj->vma_list, vma_link) |
4054 | vma->node.color = cache_level; | |
4055 | obj->cache_level = cache_level; | |
4056 | ||
0f71979a CW |
4057 | if (obj->cache_dirty && |
4058 | obj->base.write_domain != I915_GEM_DOMAIN_CPU && | |
4059 | cpu_write_needs_clflush(obj)) { | |
4060 | if (i915_gem_clflush_object(obj, true)) | |
4061 | i915_gem_chipset_flush(obj->base.dev); | |
e4ffd173 CW |
4062 | } |
4063 | ||
e4ffd173 CW |
4064 | return 0; |
4065 | } | |
4066 | ||
199adf40 BW |
4067 | int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data, |
4068 | struct drm_file *file) | |
e6994aee | 4069 | { |
199adf40 | 4070 | struct drm_i915_gem_caching *args = data; |
e6994aee | 4071 | struct drm_i915_gem_object *obj; |
e6994aee CW |
4072 | |
4073 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); | |
432be69d CW |
4074 | if (&obj->base == NULL) |
4075 | return -ENOENT; | |
e6994aee | 4076 | |
651d794f CW |
4077 | switch (obj->cache_level) { |
4078 | case I915_CACHE_LLC: | |
4079 | case I915_CACHE_L3_LLC: | |
4080 | args->caching = I915_CACHING_CACHED; | |
4081 | break; | |
4082 | ||
4257d3ba CW |
4083 | case I915_CACHE_WT: |
4084 | args->caching = I915_CACHING_DISPLAY; | |
4085 | break; | |
4086 | ||
651d794f CW |
4087 | default: |
4088 | args->caching = I915_CACHING_NONE; | |
4089 | break; | |
4090 | } | |
e6994aee | 4091 | |
432be69d CW |
4092 | drm_gem_object_unreference_unlocked(&obj->base); |
4093 | return 0; | |
e6994aee CW |
4094 | } |
4095 | ||
199adf40 BW |
4096 | int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data, |
4097 | struct drm_file *file) | |
e6994aee | 4098 | { |
199adf40 | 4099 | struct drm_i915_gem_caching *args = data; |
e6994aee CW |
4100 | struct drm_i915_gem_object *obj; |
4101 | enum i915_cache_level level; | |
4102 | int ret; | |
4103 | ||
199adf40 BW |
4104 | switch (args->caching) { |
4105 | case I915_CACHING_NONE: | |
e6994aee CW |
4106 | level = I915_CACHE_NONE; |
4107 | break; | |
199adf40 | 4108 | case I915_CACHING_CACHED: |
e6994aee CW |
4109 | level = I915_CACHE_LLC; |
4110 | break; | |
4257d3ba CW |
4111 | case I915_CACHING_DISPLAY: |
4112 | level = HAS_WT(dev) ? I915_CACHE_WT : I915_CACHE_NONE; | |
4113 | break; | |
e6994aee CW |
4114 | default: |
4115 | return -EINVAL; | |
4116 | } | |
4117 | ||
3bc2913e BW |
4118 | ret = i915_mutex_lock_interruptible(dev); |
4119 | if (ret) | |
4120 | return ret; | |
4121 | ||
e6994aee CW |
4122 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
4123 | if (&obj->base == NULL) { | |
4124 | ret = -ENOENT; | |
4125 | goto unlock; | |
4126 | } | |
4127 | ||
4128 | ret = i915_gem_object_set_cache_level(obj, level); | |
4129 | ||
4130 | drm_gem_object_unreference(&obj->base); | |
4131 | unlock: | |
4132 | mutex_unlock(&dev->struct_mutex); | |
4133 | return ret; | |
4134 | } | |
4135 | ||
b9241ea3 | 4136 | /* |
2da3b9b9 CW |
4137 | * Prepare buffer for display plane (scanout, cursors, etc). |
4138 | * Can be called from an uninterruptible phase (modesetting) and allows | |
4139 | * any flushes to be pipelined (for pageflips). | |
b9241ea3 ZW |
4140 | */ |
4141 | int | |
2da3b9b9 CW |
4142 | i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, |
4143 | u32 alignment, | |
e6617330 | 4144 | struct intel_engine_cs *pipelined, |
91af127f | 4145 | struct drm_i915_gem_request **pipelined_request, |
e6617330 | 4146 | const struct i915_ggtt_view *view) |
b9241ea3 | 4147 | { |
2da3b9b9 | 4148 | u32 old_read_domains, old_write_domain; |
b9241ea3 ZW |
4149 | int ret; |
4150 | ||
91af127f | 4151 | ret = i915_gem_object_sync(obj, pipelined, pipelined_request); |
b4716185 CW |
4152 | if (ret) |
4153 | return ret; | |
b9241ea3 | 4154 | |
cc98b413 CW |
4155 | /* Mark the pin_display early so that we account for the |
4156 | * display coherency whilst setting up the cache domains. | |
4157 | */ | |
8a0c39b1 | 4158 | obj->pin_display++; |
cc98b413 | 4159 | |
a7ef0640 EA |
4160 | /* The display engine is not coherent with the LLC cache on gen6. As |
4161 | * a result, we make sure that the pinning that is about to occur is | |
4162 | * done with uncached PTEs. This is lowest common denominator for all | |
4163 | * chipsets. | |
4164 | * | |
4165 | * However for gen6+, we could do better by using the GFDT bit instead | |
4166 | * of uncaching, which would allow us to flush all the LLC-cached data | |
4167 | * with that bit in the PTE to main memory with just one PIPE_CONTROL. | |
4168 | */ | |
651d794f CW |
4169 | ret = i915_gem_object_set_cache_level(obj, |
4170 | HAS_WT(obj->base.dev) ? I915_CACHE_WT : I915_CACHE_NONE); | |
a7ef0640 | 4171 | if (ret) |
cc98b413 | 4172 | goto err_unpin_display; |
a7ef0640 | 4173 | |
2da3b9b9 CW |
4174 | /* As the user may map the buffer once pinned in the display plane |
4175 | * (e.g. libkms for the bootup splash), we have to ensure that we | |
4176 | * always use map_and_fenceable for all scanout buffers. | |
4177 | */ | |
50470bb0 TU |
4178 | ret = i915_gem_object_ggtt_pin(obj, view, alignment, |
4179 | view->type == I915_GGTT_VIEW_NORMAL ? | |
4180 | PIN_MAPPABLE : 0); | |
2da3b9b9 | 4181 | if (ret) |
cc98b413 | 4182 | goto err_unpin_display; |
2da3b9b9 | 4183 | |
e62b59e4 | 4184 | i915_gem_object_flush_cpu_write_domain(obj); |
b118c1e3 | 4185 | |
2da3b9b9 | 4186 | old_write_domain = obj->base.write_domain; |
05394f39 | 4187 | old_read_domains = obj->base.read_domains; |
2da3b9b9 CW |
4188 | |
4189 | /* It should now be out of any other write domains, and we can update | |
4190 | * the domain values for our changes. | |
4191 | */ | |
e5f1d962 | 4192 | obj->base.write_domain = 0; |
05394f39 | 4193 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; |
b9241ea3 ZW |
4194 | |
4195 | trace_i915_gem_object_change_domain(obj, | |
4196 | old_read_domains, | |
2da3b9b9 | 4197 | old_write_domain); |
b9241ea3 ZW |
4198 | |
4199 | return 0; | |
cc98b413 CW |
4200 | |
4201 | err_unpin_display: | |
8a0c39b1 | 4202 | obj->pin_display--; |
cc98b413 CW |
4203 | return ret; |
4204 | } | |
4205 | ||
4206 | void | |
e6617330 TU |
4207 | i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object *obj, |
4208 | const struct i915_ggtt_view *view) | |
cc98b413 | 4209 | { |
8a0c39b1 TU |
4210 | if (WARN_ON(obj->pin_display == 0)) |
4211 | return; | |
4212 | ||
e6617330 TU |
4213 | i915_gem_object_ggtt_unpin_view(obj, view); |
4214 | ||
8a0c39b1 | 4215 | obj->pin_display--; |
b9241ea3 ZW |
4216 | } |
4217 | ||
e47c68e9 EA |
4218 | /** |
4219 | * Moves a single object to the CPU read, and possibly write domain. | |
4220 | * | |
4221 | * This function returns when the move is complete, including waiting on | |
4222 | * flushes to occur. | |
4223 | */ | |
dabdfe02 | 4224 | int |
919926ae | 4225 | i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write) |
e47c68e9 | 4226 | { |
1c5d22f7 | 4227 | uint32_t old_write_domain, old_read_domains; |
e47c68e9 EA |
4228 | int ret; |
4229 | ||
8d7e3de1 CW |
4230 | if (obj->base.write_domain == I915_GEM_DOMAIN_CPU) |
4231 | return 0; | |
4232 | ||
0201f1ec | 4233 | ret = i915_gem_object_wait_rendering(obj, !write); |
88241785 CW |
4234 | if (ret) |
4235 | return ret; | |
4236 | ||
e47c68e9 | 4237 | i915_gem_object_flush_gtt_write_domain(obj); |
2ef7eeaa | 4238 | |
05394f39 CW |
4239 | old_write_domain = obj->base.write_domain; |
4240 | old_read_domains = obj->base.read_domains; | |
1c5d22f7 | 4241 | |
e47c68e9 | 4242 | /* Flush the CPU cache if it's still invalid. */ |
05394f39 | 4243 | if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) { |
2c22569b | 4244 | i915_gem_clflush_object(obj, false); |
2ef7eeaa | 4245 | |
05394f39 | 4246 | obj->base.read_domains |= I915_GEM_DOMAIN_CPU; |
2ef7eeaa EA |
4247 | } |
4248 | ||
4249 | /* It should now be out of any other write domains, and we can update | |
4250 | * the domain values for our changes. | |
4251 | */ | |
05394f39 | 4252 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) != 0); |
e47c68e9 EA |
4253 | |
4254 | /* If we're writing through the CPU, then the GPU read domains will | |
4255 | * need to be invalidated at next use. | |
4256 | */ | |
4257 | if (write) { | |
05394f39 CW |
4258 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; |
4259 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
e47c68e9 | 4260 | } |
2ef7eeaa | 4261 | |
1c5d22f7 CW |
4262 | trace_i915_gem_object_change_domain(obj, |
4263 | old_read_domains, | |
4264 | old_write_domain); | |
4265 | ||
2ef7eeaa EA |
4266 | return 0; |
4267 | } | |
4268 | ||
673a394b EA |
4269 | /* Throttle our rendering by waiting until the ring has completed our requests |
4270 | * emitted over 20 msec ago. | |
4271 | * | |
b962442e EA |
4272 | * Note that if we were to use the current jiffies each time around the loop, |
4273 | * we wouldn't escape the function with any frames outstanding if the time to | |
4274 | * render a frame was over 20ms. | |
4275 | * | |
673a394b EA |
4276 | * This should get us reasonable parallelism between CPU and GPU but also |
4277 | * relatively low latency when blocking on a particular request to finish. | |
4278 | */ | |
40a5f0de | 4279 | static int |
f787a5f5 | 4280 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file) |
40a5f0de | 4281 | { |
f787a5f5 CW |
4282 | struct drm_i915_private *dev_priv = dev->dev_private; |
4283 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
d0bc54f2 | 4284 | unsigned long recent_enough = jiffies - DRM_I915_THROTTLE_JIFFIES; |
54fb2411 | 4285 | struct drm_i915_gem_request *request, *target = NULL; |
f69061be | 4286 | unsigned reset_counter; |
f787a5f5 | 4287 | int ret; |
93533c29 | 4288 | |
308887aa DV |
4289 | ret = i915_gem_wait_for_error(&dev_priv->gpu_error); |
4290 | if (ret) | |
4291 | return ret; | |
4292 | ||
4293 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, false); | |
4294 | if (ret) | |
4295 | return ret; | |
e110e8d6 | 4296 | |
1c25595f | 4297 | spin_lock(&file_priv->mm.lock); |
f787a5f5 | 4298 | list_for_each_entry(request, &file_priv->mm.request_list, client_list) { |
b962442e EA |
4299 | if (time_after_eq(request->emitted_jiffies, recent_enough)) |
4300 | break; | |
40a5f0de | 4301 | |
fcfa423c JH |
4302 | /* |
4303 | * Note that the request might not have been submitted yet. | |
4304 | * In which case emitted_jiffies will be zero. | |
4305 | */ | |
4306 | if (!request->emitted_jiffies) | |
4307 | continue; | |
4308 | ||
54fb2411 | 4309 | target = request; |
b962442e | 4310 | } |
f69061be | 4311 | reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter); |
ff865885 JH |
4312 | if (target) |
4313 | i915_gem_request_reference(target); | |
1c25595f | 4314 | spin_unlock(&file_priv->mm.lock); |
40a5f0de | 4315 | |
54fb2411 | 4316 | if (target == NULL) |
f787a5f5 | 4317 | return 0; |
2bc43b5c | 4318 | |
9c654818 | 4319 | ret = __i915_wait_request(target, reset_counter, true, NULL, NULL); |
f787a5f5 CW |
4320 | if (ret == 0) |
4321 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, 0); | |
40a5f0de | 4322 | |
41037f9f | 4323 | i915_gem_request_unreference__unlocked(target); |
ff865885 | 4324 | |
40a5f0de EA |
4325 | return ret; |
4326 | } | |
4327 | ||
d23db88c CW |
4328 | static bool |
4329 | i915_vma_misplaced(struct i915_vma *vma, uint32_t alignment, uint64_t flags) | |
4330 | { | |
4331 | struct drm_i915_gem_object *obj = vma->obj; | |
4332 | ||
4333 | if (alignment && | |
4334 | vma->node.start & (alignment - 1)) | |
4335 | return true; | |
4336 | ||
4337 | if (flags & PIN_MAPPABLE && !obj->map_and_fenceable) | |
4338 | return true; | |
4339 | ||
4340 | if (flags & PIN_OFFSET_BIAS && | |
4341 | vma->node.start < (flags & PIN_OFFSET_MASK)) | |
4342 | return true; | |
4343 | ||
4344 | return false; | |
4345 | } | |
4346 | ||
ec7adb6e JL |
4347 | static int |
4348 | i915_gem_object_do_pin(struct drm_i915_gem_object *obj, | |
4349 | struct i915_address_space *vm, | |
4350 | const struct i915_ggtt_view *ggtt_view, | |
4351 | uint32_t alignment, | |
4352 | uint64_t flags) | |
673a394b | 4353 | { |
6e7186af | 4354 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
07fe0b12 | 4355 | struct i915_vma *vma; |
ef79e17c | 4356 | unsigned bound; |
673a394b EA |
4357 | int ret; |
4358 | ||
6e7186af BW |
4359 | if (WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base)) |
4360 | return -ENODEV; | |
4361 | ||
bf3d149b | 4362 | if (WARN_ON(flags & (PIN_GLOBAL | PIN_MAPPABLE) && !i915_is_ggtt(vm))) |
1ec9e26d | 4363 | return -EINVAL; |
07fe0b12 | 4364 | |
c826c449 CW |
4365 | if (WARN_ON((flags & (PIN_MAPPABLE | PIN_GLOBAL)) == PIN_MAPPABLE)) |
4366 | return -EINVAL; | |
4367 | ||
ec7adb6e JL |
4368 | if (WARN_ON(i915_is_ggtt(vm) != !!ggtt_view)) |
4369 | return -EINVAL; | |
4370 | ||
4371 | vma = ggtt_view ? i915_gem_obj_to_ggtt_view(obj, ggtt_view) : | |
4372 | i915_gem_obj_to_vma(obj, vm); | |
4373 | ||
4374 | if (IS_ERR(vma)) | |
4375 | return PTR_ERR(vma); | |
4376 | ||
07fe0b12 | 4377 | if (vma) { |
d7f46fc4 BW |
4378 | if (WARN_ON(vma->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT)) |
4379 | return -EBUSY; | |
4380 | ||
d23db88c | 4381 | if (i915_vma_misplaced(vma, alignment, flags)) { |
ec7adb6e | 4382 | unsigned long offset; |
9abc4648 | 4383 | offset = ggtt_view ? i915_gem_obj_ggtt_offset_view(obj, ggtt_view) : |
ec7adb6e | 4384 | i915_gem_obj_offset(obj, vm); |
d7f46fc4 | 4385 | WARN(vma->pin_count, |
ec7adb6e | 4386 | "bo is already pinned in %s with incorrect alignment:" |
f343c5f6 | 4387 | " offset=%lx, req.alignment=%x, req.map_and_fenceable=%d," |
75e9e915 | 4388 | " obj->map_and_fenceable=%d\n", |
ec7adb6e JL |
4389 | ggtt_view ? "ggtt" : "ppgtt", |
4390 | offset, | |
fe14d5f4 | 4391 | alignment, |
d23db88c | 4392 | !!(flags & PIN_MAPPABLE), |
05394f39 | 4393 | obj->map_and_fenceable); |
07fe0b12 | 4394 | ret = i915_vma_unbind(vma); |
ac0c6b5a CW |
4395 | if (ret) |
4396 | return ret; | |
8ea99c92 DV |
4397 | |
4398 | vma = NULL; | |
ac0c6b5a CW |
4399 | } |
4400 | } | |
4401 | ||
ef79e17c | 4402 | bound = vma ? vma->bound : 0; |
8ea99c92 | 4403 | if (vma == NULL || !drm_mm_node_allocated(&vma->node)) { |
ec7adb6e JL |
4404 | vma = i915_gem_object_bind_to_vm(obj, vm, ggtt_view, alignment, |
4405 | flags); | |
262de145 DV |
4406 | if (IS_ERR(vma)) |
4407 | return PTR_ERR(vma); | |
0875546c DV |
4408 | } else { |
4409 | ret = i915_vma_bind(vma, obj->cache_level, flags); | |
fe14d5f4 TU |
4410 | if (ret) |
4411 | return ret; | |
4412 | } | |
74898d7e | 4413 | |
91e6711e JL |
4414 | if (ggtt_view && ggtt_view->type == I915_GGTT_VIEW_NORMAL && |
4415 | (bound ^ vma->bound) & GLOBAL_BIND) { | |
ef79e17c CW |
4416 | bool mappable, fenceable; |
4417 | u32 fence_size, fence_alignment; | |
4418 | ||
4419 | fence_size = i915_gem_get_gtt_size(obj->base.dev, | |
4420 | obj->base.size, | |
4421 | obj->tiling_mode); | |
4422 | fence_alignment = i915_gem_get_gtt_alignment(obj->base.dev, | |
4423 | obj->base.size, | |
4424 | obj->tiling_mode, | |
4425 | true); | |
4426 | ||
4427 | fenceable = (vma->node.size == fence_size && | |
4428 | (vma->node.start & (fence_alignment - 1)) == 0); | |
4429 | ||
e8dec1dd | 4430 | mappable = (vma->node.start + fence_size <= |
ef79e17c CW |
4431 | dev_priv->gtt.mappable_end); |
4432 | ||
4433 | obj->map_and_fenceable = mappable && fenceable; | |
ef79e17c | 4434 | |
91e6711e JL |
4435 | WARN_ON(flags & PIN_MAPPABLE && !obj->map_and_fenceable); |
4436 | } | |
ef79e17c | 4437 | |
8ea99c92 | 4438 | vma->pin_count++; |
673a394b EA |
4439 | return 0; |
4440 | } | |
4441 | ||
ec7adb6e JL |
4442 | int |
4443 | i915_gem_object_pin(struct drm_i915_gem_object *obj, | |
4444 | struct i915_address_space *vm, | |
4445 | uint32_t alignment, | |
4446 | uint64_t flags) | |
4447 | { | |
4448 | return i915_gem_object_do_pin(obj, vm, | |
4449 | i915_is_ggtt(vm) ? &i915_ggtt_view_normal : NULL, | |
4450 | alignment, flags); | |
4451 | } | |
4452 | ||
4453 | int | |
4454 | i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj, | |
4455 | const struct i915_ggtt_view *view, | |
4456 | uint32_t alignment, | |
4457 | uint64_t flags) | |
4458 | { | |
4459 | if (WARN_ONCE(!view, "no view specified")) | |
4460 | return -EINVAL; | |
4461 | ||
4462 | return i915_gem_object_do_pin(obj, i915_obj_to_ggtt(obj), view, | |
6fafab76 | 4463 | alignment, flags | PIN_GLOBAL); |
ec7adb6e JL |
4464 | } |
4465 | ||
673a394b | 4466 | void |
e6617330 TU |
4467 | i915_gem_object_ggtt_unpin_view(struct drm_i915_gem_object *obj, |
4468 | const struct i915_ggtt_view *view) | |
673a394b | 4469 | { |
e6617330 | 4470 | struct i915_vma *vma = i915_gem_obj_to_ggtt_view(obj, view); |
673a394b | 4471 | |
d7f46fc4 | 4472 | BUG_ON(!vma); |
e6617330 | 4473 | WARN_ON(vma->pin_count == 0); |
9abc4648 | 4474 | WARN_ON(!i915_gem_obj_ggtt_bound_view(obj, view)); |
d7f46fc4 | 4475 | |
30154650 | 4476 | --vma->pin_count; |
673a394b EA |
4477 | } |
4478 | ||
d8ffa60b DV |
4479 | bool |
4480 | i915_gem_object_pin_fence(struct drm_i915_gem_object *obj) | |
4481 | { | |
4482 | if (obj->fence_reg != I915_FENCE_REG_NONE) { | |
4483 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
4484 | struct i915_vma *ggtt_vma = i915_gem_obj_to_ggtt(obj); | |
4485 | ||
4486 | WARN_ON(!ggtt_vma || | |
4487 | dev_priv->fence_regs[obj->fence_reg].pin_count > | |
4488 | ggtt_vma->pin_count); | |
4489 | dev_priv->fence_regs[obj->fence_reg].pin_count++; | |
4490 | return true; | |
4491 | } else | |
4492 | return false; | |
4493 | } | |
4494 | ||
4495 | void | |
4496 | i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj) | |
4497 | { | |
4498 | if (obj->fence_reg != I915_FENCE_REG_NONE) { | |
4499 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
4500 | WARN_ON(dev_priv->fence_regs[obj->fence_reg].pin_count <= 0); | |
4501 | dev_priv->fence_regs[obj->fence_reg].pin_count--; | |
4502 | } | |
4503 | } | |
4504 | ||
673a394b EA |
4505 | int |
4506 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 4507 | struct drm_file *file) |
673a394b EA |
4508 | { |
4509 | struct drm_i915_gem_busy *args = data; | |
05394f39 | 4510 | struct drm_i915_gem_object *obj; |
30dbf0c0 CW |
4511 | int ret; |
4512 | ||
76c1dec1 | 4513 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 4514 | if (ret) |
76c1dec1 | 4515 | return ret; |
673a394b | 4516 | |
05394f39 | 4517 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 4518 | if (&obj->base == NULL) { |
1d7cfea1 CW |
4519 | ret = -ENOENT; |
4520 | goto unlock; | |
673a394b | 4521 | } |
d1b851fc | 4522 | |
0be555b6 CW |
4523 | /* Count all active objects as busy, even if they are currently not used |
4524 | * by the gpu. Users of this interface expect objects to eventually | |
4525 | * become non-busy without any further actions, therefore emit any | |
4526 | * necessary flushes here. | |
c4de0a5d | 4527 | */ |
30dfebf3 | 4528 | ret = i915_gem_object_flush_active(obj); |
b4716185 CW |
4529 | if (ret) |
4530 | goto unref; | |
0be555b6 | 4531 | |
b4716185 CW |
4532 | BUILD_BUG_ON(I915_NUM_RINGS > 16); |
4533 | args->busy = obj->active << 16; | |
4534 | if (obj->last_write_req) | |
4535 | args->busy |= obj->last_write_req->ring->id; | |
673a394b | 4536 | |
b4716185 | 4537 | unref: |
05394f39 | 4538 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 4539 | unlock: |
673a394b | 4540 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 4541 | return ret; |
673a394b EA |
4542 | } |
4543 | ||
4544 | int | |
4545 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, | |
4546 | struct drm_file *file_priv) | |
4547 | { | |
0206e353 | 4548 | return i915_gem_ring_throttle(dev, file_priv); |
673a394b EA |
4549 | } |
4550 | ||
3ef94daa CW |
4551 | int |
4552 | i915_gem_madvise_ioctl(struct drm_device *dev, void *data, | |
4553 | struct drm_file *file_priv) | |
4554 | { | |
656bfa3a | 4555 | struct drm_i915_private *dev_priv = dev->dev_private; |
3ef94daa | 4556 | struct drm_i915_gem_madvise *args = data; |
05394f39 | 4557 | struct drm_i915_gem_object *obj; |
76c1dec1 | 4558 | int ret; |
3ef94daa CW |
4559 | |
4560 | switch (args->madv) { | |
4561 | case I915_MADV_DONTNEED: | |
4562 | case I915_MADV_WILLNEED: | |
4563 | break; | |
4564 | default: | |
4565 | return -EINVAL; | |
4566 | } | |
4567 | ||
1d7cfea1 CW |
4568 | ret = i915_mutex_lock_interruptible(dev); |
4569 | if (ret) | |
4570 | return ret; | |
4571 | ||
05394f39 | 4572 | obj = to_intel_bo(drm_gem_object_lookup(dev, file_priv, args->handle)); |
c8725226 | 4573 | if (&obj->base == NULL) { |
1d7cfea1 CW |
4574 | ret = -ENOENT; |
4575 | goto unlock; | |
3ef94daa | 4576 | } |
3ef94daa | 4577 | |
d7f46fc4 | 4578 | if (i915_gem_obj_is_pinned(obj)) { |
1d7cfea1 CW |
4579 | ret = -EINVAL; |
4580 | goto out; | |
3ef94daa CW |
4581 | } |
4582 | ||
656bfa3a DV |
4583 | if (obj->pages && |
4584 | obj->tiling_mode != I915_TILING_NONE && | |
4585 | dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) { | |
4586 | if (obj->madv == I915_MADV_WILLNEED) | |
4587 | i915_gem_object_unpin_pages(obj); | |
4588 | if (args->madv == I915_MADV_WILLNEED) | |
4589 | i915_gem_object_pin_pages(obj); | |
4590 | } | |
4591 | ||
05394f39 CW |
4592 | if (obj->madv != __I915_MADV_PURGED) |
4593 | obj->madv = args->madv; | |
3ef94daa | 4594 | |
6c085a72 | 4595 | /* if the object is no longer attached, discard its backing storage */ |
be6a0376 | 4596 | if (obj->madv == I915_MADV_DONTNEED && obj->pages == NULL) |
2d7ef395 CW |
4597 | i915_gem_object_truncate(obj); |
4598 | ||
05394f39 | 4599 | args->retained = obj->madv != __I915_MADV_PURGED; |
bb6baf76 | 4600 | |
1d7cfea1 | 4601 | out: |
05394f39 | 4602 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 4603 | unlock: |
3ef94daa | 4604 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 4605 | return ret; |
3ef94daa CW |
4606 | } |
4607 | ||
37e680a1 CW |
4608 | void i915_gem_object_init(struct drm_i915_gem_object *obj, |
4609 | const struct drm_i915_gem_object_ops *ops) | |
0327d6ba | 4610 | { |
b4716185 CW |
4611 | int i; |
4612 | ||
35c20a60 | 4613 | INIT_LIST_HEAD(&obj->global_list); |
b4716185 CW |
4614 | for (i = 0; i < I915_NUM_RINGS; i++) |
4615 | INIT_LIST_HEAD(&obj->ring_list[i]); | |
b25cb2f8 | 4616 | INIT_LIST_HEAD(&obj->obj_exec_link); |
2f633156 | 4617 | INIT_LIST_HEAD(&obj->vma_list); |
8d9d5744 | 4618 | INIT_LIST_HEAD(&obj->batch_pool_link); |
0327d6ba | 4619 | |
37e680a1 CW |
4620 | obj->ops = ops; |
4621 | ||
0327d6ba CW |
4622 | obj->fence_reg = I915_FENCE_REG_NONE; |
4623 | obj->madv = I915_MADV_WILLNEED; | |
0327d6ba CW |
4624 | |
4625 | i915_gem_info_add_obj(obj->base.dev->dev_private, obj->base.size); | |
4626 | } | |
4627 | ||
37e680a1 CW |
4628 | static const struct drm_i915_gem_object_ops i915_gem_object_ops = { |
4629 | .get_pages = i915_gem_object_get_pages_gtt, | |
4630 | .put_pages = i915_gem_object_put_pages_gtt, | |
4631 | }; | |
4632 | ||
05394f39 CW |
4633 | struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev, |
4634 | size_t size) | |
ac52bc56 | 4635 | { |
c397b908 | 4636 | struct drm_i915_gem_object *obj; |
5949eac4 | 4637 | struct address_space *mapping; |
1a240d4d | 4638 | gfp_t mask; |
ac52bc56 | 4639 | |
42dcedd4 | 4640 | obj = i915_gem_object_alloc(dev); |
c397b908 DV |
4641 | if (obj == NULL) |
4642 | return NULL; | |
673a394b | 4643 | |
c397b908 | 4644 | if (drm_gem_object_init(dev, &obj->base, size) != 0) { |
42dcedd4 | 4645 | i915_gem_object_free(obj); |
c397b908 DV |
4646 | return NULL; |
4647 | } | |
673a394b | 4648 | |
bed1ea95 CW |
4649 | mask = GFP_HIGHUSER | __GFP_RECLAIMABLE; |
4650 | if (IS_CRESTLINE(dev) || IS_BROADWATER(dev)) { | |
4651 | /* 965gm cannot relocate objects above 4GiB. */ | |
4652 | mask &= ~__GFP_HIGHMEM; | |
4653 | mask |= __GFP_DMA32; | |
4654 | } | |
4655 | ||
496ad9aa | 4656 | mapping = file_inode(obj->base.filp)->i_mapping; |
bed1ea95 | 4657 | mapping_set_gfp_mask(mapping, mask); |
5949eac4 | 4658 | |
37e680a1 | 4659 | i915_gem_object_init(obj, &i915_gem_object_ops); |
73aa808f | 4660 | |
c397b908 DV |
4661 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
4662 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; | |
673a394b | 4663 | |
3d29b842 ED |
4664 | if (HAS_LLC(dev)) { |
4665 | /* On some devices, we can have the GPU use the LLC (the CPU | |
a1871112 EA |
4666 | * cache) for about a 10% performance improvement |
4667 | * compared to uncached. Graphics requests other than | |
4668 | * display scanout are coherent with the CPU in | |
4669 | * accessing this cache. This means in this mode we | |
4670 | * don't need to clflush on the CPU side, and on the | |
4671 | * GPU side we only need to flush internal caches to | |
4672 | * get data visible to the CPU. | |
4673 | * | |
4674 | * However, we maintain the display planes as UC, and so | |
4675 | * need to rebind when first used as such. | |
4676 | */ | |
4677 | obj->cache_level = I915_CACHE_LLC; | |
4678 | } else | |
4679 | obj->cache_level = I915_CACHE_NONE; | |
4680 | ||
d861e338 DV |
4681 | trace_i915_gem_object_create(obj); |
4682 | ||
05394f39 | 4683 | return obj; |
c397b908 DV |
4684 | } |
4685 | ||
340fbd8c CW |
4686 | static bool discard_backing_storage(struct drm_i915_gem_object *obj) |
4687 | { | |
4688 | /* If we are the last user of the backing storage (be it shmemfs | |
4689 | * pages or stolen etc), we know that the pages are going to be | |
4690 | * immediately released. In this case, we can then skip copying | |
4691 | * back the contents from the GPU. | |
4692 | */ | |
4693 | ||
4694 | if (obj->madv != I915_MADV_WILLNEED) | |
4695 | return false; | |
4696 | ||
4697 | if (obj->base.filp == NULL) | |
4698 | return true; | |
4699 | ||
4700 | /* At first glance, this looks racy, but then again so would be | |
4701 | * userspace racing mmap against close. However, the first external | |
4702 | * reference to the filp can only be obtained through the | |
4703 | * i915_gem_mmap_ioctl() which safeguards us against the user | |
4704 | * acquiring such a reference whilst we are in the middle of | |
4705 | * freeing the object. | |
4706 | */ | |
4707 | return atomic_long_read(&obj->base.filp->f_count) == 1; | |
4708 | } | |
4709 | ||
1488fc08 | 4710 | void i915_gem_free_object(struct drm_gem_object *gem_obj) |
673a394b | 4711 | { |
1488fc08 | 4712 | struct drm_i915_gem_object *obj = to_intel_bo(gem_obj); |
05394f39 | 4713 | struct drm_device *dev = obj->base.dev; |
3e31c6c0 | 4714 | struct drm_i915_private *dev_priv = dev->dev_private; |
07fe0b12 | 4715 | struct i915_vma *vma, *next; |
673a394b | 4716 | |
f65c9168 PZ |
4717 | intel_runtime_pm_get(dev_priv); |
4718 | ||
26e12f89 CW |
4719 | trace_i915_gem_object_destroy(obj); |
4720 | ||
07fe0b12 | 4721 | list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) { |
d7f46fc4 BW |
4722 | int ret; |
4723 | ||
4724 | vma->pin_count = 0; | |
4725 | ret = i915_vma_unbind(vma); | |
07fe0b12 BW |
4726 | if (WARN_ON(ret == -ERESTARTSYS)) { |
4727 | bool was_interruptible; | |
1488fc08 | 4728 | |
07fe0b12 BW |
4729 | was_interruptible = dev_priv->mm.interruptible; |
4730 | dev_priv->mm.interruptible = false; | |
1488fc08 | 4731 | |
07fe0b12 | 4732 | WARN_ON(i915_vma_unbind(vma)); |
1488fc08 | 4733 | |
07fe0b12 BW |
4734 | dev_priv->mm.interruptible = was_interruptible; |
4735 | } | |
1488fc08 CW |
4736 | } |
4737 | ||
1d64ae71 BW |
4738 | /* Stolen objects don't hold a ref, but do hold pin count. Fix that up |
4739 | * before progressing. */ | |
4740 | if (obj->stolen) | |
4741 | i915_gem_object_unpin_pages(obj); | |
4742 | ||
a071fa00 DV |
4743 | WARN_ON(obj->frontbuffer_bits); |
4744 | ||
656bfa3a DV |
4745 | if (obj->pages && obj->madv == I915_MADV_WILLNEED && |
4746 | dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES && | |
4747 | obj->tiling_mode != I915_TILING_NONE) | |
4748 | i915_gem_object_unpin_pages(obj); | |
4749 | ||
401c29f6 BW |
4750 | if (WARN_ON(obj->pages_pin_count)) |
4751 | obj->pages_pin_count = 0; | |
340fbd8c | 4752 | if (discard_backing_storage(obj)) |
5537252b | 4753 | obj->madv = I915_MADV_DONTNEED; |
37e680a1 | 4754 | i915_gem_object_put_pages(obj); |
d8cb5086 | 4755 | i915_gem_object_free_mmap_offset(obj); |
de151cf6 | 4756 | |
9da3da66 CW |
4757 | BUG_ON(obj->pages); |
4758 | ||
2f745ad3 CW |
4759 | if (obj->base.import_attach) |
4760 | drm_prime_gem_destroy(&obj->base, NULL); | |
de151cf6 | 4761 | |
5cc9ed4b CW |
4762 | if (obj->ops->release) |
4763 | obj->ops->release(obj); | |
4764 | ||
05394f39 CW |
4765 | drm_gem_object_release(&obj->base); |
4766 | i915_gem_info_remove_obj(dev_priv, obj->base.size); | |
c397b908 | 4767 | |
05394f39 | 4768 | kfree(obj->bit_17); |
42dcedd4 | 4769 | i915_gem_object_free(obj); |
f65c9168 PZ |
4770 | |
4771 | intel_runtime_pm_put(dev_priv); | |
673a394b EA |
4772 | } |
4773 | ||
ec7adb6e JL |
4774 | struct i915_vma *i915_gem_obj_to_vma(struct drm_i915_gem_object *obj, |
4775 | struct i915_address_space *vm) | |
e656a6cb DV |
4776 | { |
4777 | struct i915_vma *vma; | |
ec7adb6e JL |
4778 | list_for_each_entry(vma, &obj->vma_list, vma_link) { |
4779 | if (i915_is_ggtt(vma->vm) && | |
4780 | vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) | |
4781 | continue; | |
4782 | if (vma->vm == vm) | |
e656a6cb | 4783 | return vma; |
ec7adb6e JL |
4784 | } |
4785 | return NULL; | |
4786 | } | |
4787 | ||
4788 | struct i915_vma *i915_gem_obj_to_ggtt_view(struct drm_i915_gem_object *obj, | |
4789 | const struct i915_ggtt_view *view) | |
4790 | { | |
4791 | struct i915_address_space *ggtt = i915_obj_to_ggtt(obj); | |
4792 | struct i915_vma *vma; | |
e656a6cb | 4793 | |
ec7adb6e JL |
4794 | if (WARN_ONCE(!view, "no view specified")) |
4795 | return ERR_PTR(-EINVAL); | |
4796 | ||
4797 | list_for_each_entry(vma, &obj->vma_list, vma_link) | |
9abc4648 JL |
4798 | if (vma->vm == ggtt && |
4799 | i915_ggtt_view_equal(&vma->ggtt_view, view)) | |
ec7adb6e | 4800 | return vma; |
e656a6cb DV |
4801 | return NULL; |
4802 | } | |
4803 | ||
2f633156 BW |
4804 | void i915_gem_vma_destroy(struct i915_vma *vma) |
4805 | { | |
b9d06dd9 | 4806 | struct i915_address_space *vm = NULL; |
2f633156 | 4807 | WARN_ON(vma->node.allocated); |
aaa05667 CW |
4808 | |
4809 | /* Keep the vma as a placeholder in the execbuffer reservation lists */ | |
4810 | if (!list_empty(&vma->exec_list)) | |
4811 | return; | |
4812 | ||
b9d06dd9 | 4813 | vm = vma->vm; |
b9d06dd9 | 4814 | |
841cd773 DV |
4815 | if (!i915_is_ggtt(vm)) |
4816 | i915_ppgtt_put(i915_vm_to_ppgtt(vm)); | |
b9d06dd9 | 4817 | |
8b9c2b94 | 4818 | list_del(&vma->vma_link); |
b93dab6e | 4819 | |
e20d2ab7 | 4820 | kmem_cache_free(to_i915(vma->obj->base.dev)->vmas, vma); |
2f633156 BW |
4821 | } |
4822 | ||
e3efda49 CW |
4823 | static void |
4824 | i915_gem_stop_ringbuffers(struct drm_device *dev) | |
4825 | { | |
4826 | struct drm_i915_private *dev_priv = dev->dev_private; | |
a4872ba6 | 4827 | struct intel_engine_cs *ring; |
e3efda49 CW |
4828 | int i; |
4829 | ||
4830 | for_each_ring(ring, dev_priv, i) | |
a83014d3 | 4831 | dev_priv->gt.stop_ring(ring); |
e3efda49 CW |
4832 | } |
4833 | ||
29105ccc | 4834 | int |
45c5f202 | 4835 | i915_gem_suspend(struct drm_device *dev) |
29105ccc | 4836 | { |
3e31c6c0 | 4837 | struct drm_i915_private *dev_priv = dev->dev_private; |
45c5f202 | 4838 | int ret = 0; |
28dfe52a | 4839 | |
45c5f202 | 4840 | mutex_lock(&dev->struct_mutex); |
b2da9fe5 | 4841 | ret = i915_gpu_idle(dev); |
f7403347 | 4842 | if (ret) |
45c5f202 | 4843 | goto err; |
f7403347 | 4844 | |
b2da9fe5 | 4845 | i915_gem_retire_requests(dev); |
673a394b | 4846 | |
e3efda49 | 4847 | i915_gem_stop_ringbuffers(dev); |
45c5f202 CW |
4848 | mutex_unlock(&dev->struct_mutex); |
4849 | ||
737b1506 | 4850 | cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work); |
29105ccc | 4851 | cancel_delayed_work_sync(&dev_priv->mm.retire_work); |
274fa1c1 | 4852 | flush_delayed_work(&dev_priv->mm.idle_work); |
29105ccc | 4853 | |
bdcf120b CW |
4854 | /* Assert that we sucessfully flushed all the work and |
4855 | * reset the GPU back to its idle, low power state. | |
4856 | */ | |
4857 | WARN_ON(dev_priv->mm.busy); | |
4858 | ||
673a394b | 4859 | return 0; |
45c5f202 CW |
4860 | |
4861 | err: | |
4862 | mutex_unlock(&dev->struct_mutex); | |
4863 | return ret; | |
673a394b EA |
4864 | } |
4865 | ||
6909a666 | 4866 | int i915_gem_l3_remap(struct drm_i915_gem_request *req, int slice) |
b9524a1e | 4867 | { |
6909a666 | 4868 | struct intel_engine_cs *ring = req->ring; |
c3787e2e | 4869 | struct drm_device *dev = ring->dev; |
3e31c6c0 | 4870 | struct drm_i915_private *dev_priv = dev->dev_private; |
35a85ac6 BW |
4871 | u32 reg_base = GEN7_L3LOG_BASE + (slice * 0x200); |
4872 | u32 *remap_info = dev_priv->l3_parity.remap_info[slice]; | |
c3787e2e | 4873 | int i, ret; |
b9524a1e | 4874 | |
040d2baa | 4875 | if (!HAS_L3_DPF(dev) || !remap_info) |
c3787e2e | 4876 | return 0; |
b9524a1e | 4877 | |
5fb9de1a | 4878 | ret = intel_ring_begin(req, GEN7_L3LOG_SIZE / 4 * 3); |
c3787e2e BW |
4879 | if (ret) |
4880 | return ret; | |
b9524a1e | 4881 | |
c3787e2e BW |
4882 | /* |
4883 | * Note: We do not worry about the concurrent register cacheline hang | |
4884 | * here because no other code should access these registers other than | |
4885 | * at initialization time. | |
4886 | */ | |
b9524a1e | 4887 | for (i = 0; i < GEN7_L3LOG_SIZE; i += 4) { |
c3787e2e BW |
4888 | intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1)); |
4889 | intel_ring_emit(ring, reg_base + i); | |
4890 | intel_ring_emit(ring, remap_info[i/4]); | |
b9524a1e BW |
4891 | } |
4892 | ||
c3787e2e | 4893 | intel_ring_advance(ring); |
b9524a1e | 4894 | |
c3787e2e | 4895 | return ret; |
b9524a1e BW |
4896 | } |
4897 | ||
f691e2f4 DV |
4898 | void i915_gem_init_swizzling(struct drm_device *dev) |
4899 | { | |
3e31c6c0 | 4900 | struct drm_i915_private *dev_priv = dev->dev_private; |
f691e2f4 | 4901 | |
11782b02 | 4902 | if (INTEL_INFO(dev)->gen < 5 || |
f691e2f4 DV |
4903 | dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE) |
4904 | return; | |
4905 | ||
4906 | I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) | | |
4907 | DISP_TILE_SURFACE_SWIZZLING); | |
4908 | ||
11782b02 DV |
4909 | if (IS_GEN5(dev)) |
4910 | return; | |
4911 | ||
f691e2f4 DV |
4912 | I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL); |
4913 | if (IS_GEN6(dev)) | |
6b26c86d | 4914 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB)); |
8782e26c | 4915 | else if (IS_GEN7(dev)) |
6b26c86d | 4916 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB)); |
31a5336e BW |
4917 | else if (IS_GEN8(dev)) |
4918 | I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_BDW)); | |
8782e26c BW |
4919 | else |
4920 | BUG(); | |
f691e2f4 | 4921 | } |
e21af88d | 4922 | |
67b1b571 CW |
4923 | static bool |
4924 | intel_enable_blt(struct drm_device *dev) | |
4925 | { | |
4926 | if (!HAS_BLT(dev)) | |
4927 | return false; | |
4928 | ||
4929 | /* The blitter was dysfunctional on early prototypes */ | |
4930 | if (IS_GEN6(dev) && dev->pdev->revision < 8) { | |
4931 | DRM_INFO("BLT not supported on this pre-production hardware;" | |
4932 | " graphics performance will be degraded.\n"); | |
4933 | return false; | |
4934 | } | |
4935 | ||
4936 | return true; | |
4937 | } | |
4938 | ||
81e7f200 VS |
4939 | static void init_unused_ring(struct drm_device *dev, u32 base) |
4940 | { | |
4941 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4942 | ||
4943 | I915_WRITE(RING_CTL(base), 0); | |
4944 | I915_WRITE(RING_HEAD(base), 0); | |
4945 | I915_WRITE(RING_TAIL(base), 0); | |
4946 | I915_WRITE(RING_START(base), 0); | |
4947 | } | |
4948 | ||
4949 | static void init_unused_rings(struct drm_device *dev) | |
4950 | { | |
4951 | if (IS_I830(dev)) { | |
4952 | init_unused_ring(dev, PRB1_BASE); | |
4953 | init_unused_ring(dev, SRB0_BASE); | |
4954 | init_unused_ring(dev, SRB1_BASE); | |
4955 | init_unused_ring(dev, SRB2_BASE); | |
4956 | init_unused_ring(dev, SRB3_BASE); | |
4957 | } else if (IS_GEN2(dev)) { | |
4958 | init_unused_ring(dev, SRB0_BASE); | |
4959 | init_unused_ring(dev, SRB1_BASE); | |
4960 | } else if (IS_GEN3(dev)) { | |
4961 | init_unused_ring(dev, PRB1_BASE); | |
4962 | init_unused_ring(dev, PRB2_BASE); | |
4963 | } | |
4964 | } | |
4965 | ||
a83014d3 | 4966 | int i915_gem_init_rings(struct drm_device *dev) |
8187a2b7 | 4967 | { |
4fc7c971 | 4968 | struct drm_i915_private *dev_priv = dev->dev_private; |
8187a2b7 | 4969 | int ret; |
68f95ba9 | 4970 | |
5c1143bb | 4971 | ret = intel_init_render_ring_buffer(dev); |
68f95ba9 | 4972 | if (ret) |
b6913e4b | 4973 | return ret; |
68f95ba9 CW |
4974 | |
4975 | if (HAS_BSD(dev)) { | |
5c1143bb | 4976 | ret = intel_init_bsd_ring_buffer(dev); |
68f95ba9 CW |
4977 | if (ret) |
4978 | goto cleanup_render_ring; | |
d1b851fc | 4979 | } |
68f95ba9 | 4980 | |
67b1b571 | 4981 | if (intel_enable_blt(dev)) { |
549f7365 CW |
4982 | ret = intel_init_blt_ring_buffer(dev); |
4983 | if (ret) | |
4984 | goto cleanup_bsd_ring; | |
4985 | } | |
4986 | ||
9a8a2213 BW |
4987 | if (HAS_VEBOX(dev)) { |
4988 | ret = intel_init_vebox_ring_buffer(dev); | |
4989 | if (ret) | |
4990 | goto cleanup_blt_ring; | |
4991 | } | |
4992 | ||
845f74a7 ZY |
4993 | if (HAS_BSD2(dev)) { |
4994 | ret = intel_init_bsd2_ring_buffer(dev); | |
4995 | if (ret) | |
4996 | goto cleanup_vebox_ring; | |
4997 | } | |
9a8a2213 | 4998 | |
99433931 | 4999 | ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000)); |
4fc7c971 | 5000 | if (ret) |
845f74a7 | 5001 | goto cleanup_bsd2_ring; |
4fc7c971 BW |
5002 | |
5003 | return 0; | |
5004 | ||
845f74a7 ZY |
5005 | cleanup_bsd2_ring: |
5006 | intel_cleanup_ring_buffer(&dev_priv->ring[VCS2]); | |
9a8a2213 BW |
5007 | cleanup_vebox_ring: |
5008 | intel_cleanup_ring_buffer(&dev_priv->ring[VECS]); | |
4fc7c971 BW |
5009 | cleanup_blt_ring: |
5010 | intel_cleanup_ring_buffer(&dev_priv->ring[BCS]); | |
5011 | cleanup_bsd_ring: | |
5012 | intel_cleanup_ring_buffer(&dev_priv->ring[VCS]); | |
5013 | cleanup_render_ring: | |
5014 | intel_cleanup_ring_buffer(&dev_priv->ring[RCS]); | |
5015 | ||
5016 | return ret; | |
5017 | } | |
5018 | ||
5019 | int | |
5020 | i915_gem_init_hw(struct drm_device *dev) | |
5021 | { | |
3e31c6c0 | 5022 | struct drm_i915_private *dev_priv = dev->dev_private; |
35a57ffb | 5023 | struct intel_engine_cs *ring; |
4ad2fd88 | 5024 | int ret, i, j; |
4fc7c971 BW |
5025 | |
5026 | if (INTEL_INFO(dev)->gen < 6 && !intel_enable_gtt()) | |
5027 | return -EIO; | |
5028 | ||
5e4f5189 CW |
5029 | /* Double layer security blanket, see i915_gem_init() */ |
5030 | intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); | |
5031 | ||
59124506 | 5032 | if (dev_priv->ellc_size) |
05e21cc4 | 5033 | I915_WRITE(HSW_IDICR, I915_READ(HSW_IDICR) | IDIHASHMSK(0xf)); |
4fc7c971 | 5034 | |
0bf21347 VS |
5035 | if (IS_HASWELL(dev)) |
5036 | I915_WRITE(MI_PREDICATE_RESULT_2, IS_HSW_GT3(dev) ? | |
5037 | LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED); | |
9435373e | 5038 | |
88a2b2a3 | 5039 | if (HAS_PCH_NOP(dev)) { |
6ba844b0 DV |
5040 | if (IS_IVYBRIDGE(dev)) { |
5041 | u32 temp = I915_READ(GEN7_MSG_CTL); | |
5042 | temp &= ~(WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK); | |
5043 | I915_WRITE(GEN7_MSG_CTL, temp); | |
5044 | } else if (INTEL_INFO(dev)->gen >= 7) { | |
5045 | u32 temp = I915_READ(HSW_NDE_RSTWRN_OPT); | |
5046 | temp &= ~RESET_PCH_HANDSHAKE_ENABLE; | |
5047 | I915_WRITE(HSW_NDE_RSTWRN_OPT, temp); | |
5048 | } | |
88a2b2a3 BW |
5049 | } |
5050 | ||
4fc7c971 BW |
5051 | i915_gem_init_swizzling(dev); |
5052 | ||
d5abdfda DV |
5053 | /* |
5054 | * At least 830 can leave some of the unused rings | |
5055 | * "active" (ie. head != tail) after resume which | |
5056 | * will prevent c3 entry. Makes sure all unused rings | |
5057 | * are totally idle. | |
5058 | */ | |
5059 | init_unused_rings(dev); | |
5060 | ||
90638cc1 JH |
5061 | BUG_ON(!dev_priv->ring[RCS].default_context); |
5062 | ||
4ad2fd88 JH |
5063 | ret = i915_ppgtt_init_hw(dev); |
5064 | if (ret) { | |
5065 | DRM_ERROR("PPGTT enable HW failed %d\n", ret); | |
5066 | goto out; | |
5067 | } | |
5068 | ||
5069 | /* Need to do basic initialisation of all rings first: */ | |
35a57ffb DV |
5070 | for_each_ring(ring, dev_priv, i) { |
5071 | ret = ring->init_hw(ring); | |
5072 | if (ret) | |
5e4f5189 | 5073 | goto out; |
35a57ffb | 5074 | } |
99433931 | 5075 | |
4ad2fd88 JH |
5076 | /* Now it is safe to go back round and do everything else: */ |
5077 | for_each_ring(ring, dev_priv, i) { | |
dc4be607 JH |
5078 | struct drm_i915_gem_request *req; |
5079 | ||
90638cc1 JH |
5080 | WARN_ON(!ring->default_context); |
5081 | ||
dc4be607 JH |
5082 | ret = i915_gem_request_alloc(ring, ring->default_context, &req); |
5083 | if (ret) { | |
5084 | i915_gem_cleanup_ringbuffer(dev); | |
5085 | goto out; | |
5086 | } | |
5087 | ||
4ad2fd88 JH |
5088 | if (ring->id == RCS) { |
5089 | for (j = 0; j < NUM_L3_SLICES(dev); j++) | |
6909a666 | 5090 | i915_gem_l3_remap(req, j); |
4ad2fd88 | 5091 | } |
c3787e2e | 5092 | |
b3dd6b96 | 5093 | ret = i915_ppgtt_init_ring(req); |
4ad2fd88 JH |
5094 | if (ret && ret != -EIO) { |
5095 | DRM_ERROR("PPGTT enable ring #%d failed %d\n", i, ret); | |
dc4be607 | 5096 | i915_gem_request_cancel(req); |
4ad2fd88 JH |
5097 | i915_gem_cleanup_ringbuffer(dev); |
5098 | goto out; | |
5099 | } | |
82460d97 | 5100 | |
b3dd6b96 | 5101 | ret = i915_gem_context_enable(req); |
90638cc1 JH |
5102 | if (ret && ret != -EIO) { |
5103 | DRM_ERROR("Context enable ring #%d failed %d\n", i, ret); | |
dc4be607 | 5104 | i915_gem_request_cancel(req); |
90638cc1 JH |
5105 | i915_gem_cleanup_ringbuffer(dev); |
5106 | goto out; | |
5107 | } | |
dc4be607 | 5108 | |
75289874 | 5109 | i915_add_request_no_flush(req); |
b7c36d25 | 5110 | } |
e21af88d | 5111 | |
5e4f5189 CW |
5112 | out: |
5113 | intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); | |
2fa48d8d | 5114 | return ret; |
8187a2b7 ZN |
5115 | } |
5116 | ||
1070a42b CW |
5117 | int i915_gem_init(struct drm_device *dev) |
5118 | { | |
5119 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1070a42b CW |
5120 | int ret; |
5121 | ||
127f1003 OM |
5122 | i915.enable_execlists = intel_sanitize_enable_execlists(dev, |
5123 | i915.enable_execlists); | |
5124 | ||
1070a42b | 5125 | mutex_lock(&dev->struct_mutex); |
d62b4892 JB |
5126 | |
5127 | if (IS_VALLEYVIEW(dev)) { | |
5128 | /* VLVA0 (potential hack), BIOS isn't actually waking us */ | |
981a5aea ID |
5129 | I915_WRITE(VLV_GTLC_WAKE_CTRL, VLV_GTLC_ALLOWWAKEREQ); |
5130 | if (wait_for((I915_READ(VLV_GTLC_PW_STATUS) & | |
5131 | VLV_GTLC_ALLOWWAKEACK), 10)) | |
d62b4892 JB |
5132 | DRM_DEBUG_DRIVER("allow wake ack timed out\n"); |
5133 | } | |
5134 | ||
a83014d3 | 5135 | if (!i915.enable_execlists) { |
f3dc74c0 | 5136 | dev_priv->gt.execbuf_submit = i915_gem_ringbuffer_submission; |
a83014d3 OM |
5137 | dev_priv->gt.init_rings = i915_gem_init_rings; |
5138 | dev_priv->gt.cleanup_ring = intel_cleanup_ring_buffer; | |
5139 | dev_priv->gt.stop_ring = intel_stop_ring_buffer; | |
454afebd | 5140 | } else { |
f3dc74c0 | 5141 | dev_priv->gt.execbuf_submit = intel_execlists_submission; |
454afebd OM |
5142 | dev_priv->gt.init_rings = intel_logical_rings_init; |
5143 | dev_priv->gt.cleanup_ring = intel_logical_ring_cleanup; | |
5144 | dev_priv->gt.stop_ring = intel_logical_ring_stop; | |
a83014d3 OM |
5145 | } |
5146 | ||
5e4f5189 CW |
5147 | /* This is just a security blanket to placate dragons. |
5148 | * On some systems, we very sporadically observe that the first TLBs | |
5149 | * used by the CS may be stale, despite us poking the TLB reset. If | |
5150 | * we hold the forcewake during initialisation these problems | |
5151 | * just magically go away. | |
5152 | */ | |
5153 | intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); | |
5154 | ||
6c5566a8 | 5155 | ret = i915_gem_init_userptr(dev); |
7bcc3777 JN |
5156 | if (ret) |
5157 | goto out_unlock; | |
6c5566a8 | 5158 | |
d7e5008f | 5159 | i915_gem_init_global_gtt(dev); |
d62b4892 | 5160 | |
2fa48d8d | 5161 | ret = i915_gem_context_init(dev); |
7bcc3777 JN |
5162 | if (ret) |
5163 | goto out_unlock; | |
2fa48d8d | 5164 | |
35a57ffb DV |
5165 | ret = dev_priv->gt.init_rings(dev); |
5166 | if (ret) | |
7bcc3777 | 5167 | goto out_unlock; |
2fa48d8d | 5168 | |
1070a42b | 5169 | ret = i915_gem_init_hw(dev); |
60990320 CW |
5170 | if (ret == -EIO) { |
5171 | /* Allow ring initialisation to fail by marking the GPU as | |
5172 | * wedged. But we only want to do this where the GPU is angry, | |
5173 | * for all other failure, such as an allocation failure, bail. | |
5174 | */ | |
5175 | DRM_ERROR("Failed to initialize GPU, declaring it wedged\n"); | |
5176 | atomic_set_mask(I915_WEDGED, &dev_priv->gpu_error.reset_counter); | |
5177 | ret = 0; | |
1070a42b | 5178 | } |
7bcc3777 JN |
5179 | |
5180 | out_unlock: | |
5e4f5189 | 5181 | intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); |
60990320 | 5182 | mutex_unlock(&dev->struct_mutex); |
1070a42b | 5183 | |
60990320 | 5184 | return ret; |
1070a42b CW |
5185 | } |
5186 | ||
8187a2b7 ZN |
5187 | void |
5188 | i915_gem_cleanup_ringbuffer(struct drm_device *dev) | |
5189 | { | |
3e31c6c0 | 5190 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4872ba6 | 5191 | struct intel_engine_cs *ring; |
1ec14ad3 | 5192 | int i; |
8187a2b7 | 5193 | |
b4519513 | 5194 | for_each_ring(ring, dev_priv, i) |
a83014d3 | 5195 | dev_priv->gt.cleanup_ring(ring); |
a647828a NB |
5196 | |
5197 | if (i915.enable_execlists) | |
5198 | /* | |
5199 | * Neither the BIOS, ourselves or any other kernel | |
5200 | * expects the system to be in execlists mode on startup, | |
5201 | * so we need to reset the GPU back to legacy mode. | |
5202 | */ | |
5203 | intel_gpu_reset(dev); | |
8187a2b7 ZN |
5204 | } |
5205 | ||
64193406 | 5206 | static void |
a4872ba6 | 5207 | init_ring_lists(struct intel_engine_cs *ring) |
64193406 CW |
5208 | { |
5209 | INIT_LIST_HEAD(&ring->active_list); | |
5210 | INIT_LIST_HEAD(&ring->request_list); | |
64193406 CW |
5211 | } |
5212 | ||
7e0d96bc BW |
5213 | void i915_init_vm(struct drm_i915_private *dev_priv, |
5214 | struct i915_address_space *vm) | |
fc8c067e | 5215 | { |
7e0d96bc BW |
5216 | if (!i915_is_ggtt(vm)) |
5217 | drm_mm_init(&vm->mm, vm->start, vm->total); | |
fc8c067e BW |
5218 | vm->dev = dev_priv->dev; |
5219 | INIT_LIST_HEAD(&vm->active_list); | |
5220 | INIT_LIST_HEAD(&vm->inactive_list); | |
5221 | INIT_LIST_HEAD(&vm->global_link); | |
f72d21ed | 5222 | list_add_tail(&vm->global_link, &dev_priv->vm_list); |
fc8c067e BW |
5223 | } |
5224 | ||
673a394b EA |
5225 | void |
5226 | i915_gem_load(struct drm_device *dev) | |
5227 | { | |
3e31c6c0 | 5228 | struct drm_i915_private *dev_priv = dev->dev_private; |
42dcedd4 CW |
5229 | int i; |
5230 | ||
efab6d8d | 5231 | dev_priv->objects = |
42dcedd4 CW |
5232 | kmem_cache_create("i915_gem_object", |
5233 | sizeof(struct drm_i915_gem_object), 0, | |
5234 | SLAB_HWCACHE_ALIGN, | |
5235 | NULL); | |
e20d2ab7 CW |
5236 | dev_priv->vmas = |
5237 | kmem_cache_create("i915_gem_vma", | |
5238 | sizeof(struct i915_vma), 0, | |
5239 | SLAB_HWCACHE_ALIGN, | |
5240 | NULL); | |
efab6d8d CW |
5241 | dev_priv->requests = |
5242 | kmem_cache_create("i915_gem_request", | |
5243 | sizeof(struct drm_i915_gem_request), 0, | |
5244 | SLAB_HWCACHE_ALIGN, | |
5245 | NULL); | |
673a394b | 5246 | |
fc8c067e BW |
5247 | INIT_LIST_HEAD(&dev_priv->vm_list); |
5248 | i915_init_vm(dev_priv, &dev_priv->gtt.base); | |
5249 | ||
a33afea5 | 5250 | INIT_LIST_HEAD(&dev_priv->context_list); |
6c085a72 CW |
5251 | INIT_LIST_HEAD(&dev_priv->mm.unbound_list); |
5252 | INIT_LIST_HEAD(&dev_priv->mm.bound_list); | |
a09ba7fa | 5253 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
1ec14ad3 CW |
5254 | for (i = 0; i < I915_NUM_RINGS; i++) |
5255 | init_ring_lists(&dev_priv->ring[i]); | |
4b9de737 | 5256 | for (i = 0; i < I915_MAX_NUM_FENCES; i++) |
007cc8ac | 5257 | INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list); |
673a394b EA |
5258 | INIT_DELAYED_WORK(&dev_priv->mm.retire_work, |
5259 | i915_gem_retire_work_handler); | |
b29c19b6 CW |
5260 | INIT_DELAYED_WORK(&dev_priv->mm.idle_work, |
5261 | i915_gem_idle_work_handler); | |
1f83fee0 | 5262 | init_waitqueue_head(&dev_priv->gpu_error.reset_queue); |
31169714 | 5263 | |
72bfa19c CW |
5264 | dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL; |
5265 | ||
42b5aeab VS |
5266 | if (INTEL_INFO(dev)->gen >= 7 && !IS_VALLEYVIEW(dev)) |
5267 | dev_priv->num_fence_regs = 32; | |
5268 | else if (INTEL_INFO(dev)->gen >= 4 || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) | |
de151cf6 JB |
5269 | dev_priv->num_fence_regs = 16; |
5270 | else | |
5271 | dev_priv->num_fence_regs = 8; | |
5272 | ||
eb82289a YZ |
5273 | if (intel_vgpu_active(dev)) |
5274 | dev_priv->num_fence_regs = | |
5275 | I915_READ(vgtif_reg(avail_rs.fence_num)); | |
5276 | ||
b5aa8a0f | 5277 | /* Initialize fence registers to zero */ |
19b2dbde CW |
5278 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
5279 | i915_gem_restore_fences(dev); | |
10ed13e4 | 5280 | |
673a394b | 5281 | i915_gem_detect_bit_6_swizzle(dev); |
6b95a207 | 5282 | init_waitqueue_head(&dev_priv->pending_flip_queue); |
17250b71 | 5283 | |
ce453d81 CW |
5284 | dev_priv->mm.interruptible = true; |
5285 | ||
be6a0376 | 5286 | i915_gem_shrinker_init(dev_priv); |
f99d7069 DV |
5287 | |
5288 | mutex_init(&dev_priv->fb_tracking.lock); | |
673a394b | 5289 | } |
71acb5eb | 5290 | |
f787a5f5 | 5291 | void i915_gem_release(struct drm_device *dev, struct drm_file *file) |
b962442e | 5292 | { |
f787a5f5 | 5293 | struct drm_i915_file_private *file_priv = file->driver_priv; |
b962442e EA |
5294 | |
5295 | /* Clean up our request list when the client is going away, so that | |
5296 | * later retire_requests won't dereference our soon-to-be-gone | |
5297 | * file_priv. | |
5298 | */ | |
1c25595f | 5299 | spin_lock(&file_priv->mm.lock); |
f787a5f5 CW |
5300 | while (!list_empty(&file_priv->mm.request_list)) { |
5301 | struct drm_i915_gem_request *request; | |
5302 | ||
5303 | request = list_first_entry(&file_priv->mm.request_list, | |
5304 | struct drm_i915_gem_request, | |
5305 | client_list); | |
5306 | list_del(&request->client_list); | |
5307 | request->file_priv = NULL; | |
5308 | } | |
1c25595f | 5309 | spin_unlock(&file_priv->mm.lock); |
b29c19b6 | 5310 | |
2e1b8730 | 5311 | if (!list_empty(&file_priv->rps.link)) { |
8d3afd7d | 5312 | spin_lock(&to_i915(dev)->rps.client_lock); |
2e1b8730 | 5313 | list_del(&file_priv->rps.link); |
8d3afd7d | 5314 | spin_unlock(&to_i915(dev)->rps.client_lock); |
1854d5ca | 5315 | } |
b29c19b6 CW |
5316 | } |
5317 | ||
5318 | int i915_gem_open(struct drm_device *dev, struct drm_file *file) | |
5319 | { | |
5320 | struct drm_i915_file_private *file_priv; | |
e422b888 | 5321 | int ret; |
b29c19b6 CW |
5322 | |
5323 | DRM_DEBUG_DRIVER("\n"); | |
5324 | ||
5325 | file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); | |
5326 | if (!file_priv) | |
5327 | return -ENOMEM; | |
5328 | ||
5329 | file->driver_priv = file_priv; | |
5330 | file_priv->dev_priv = dev->dev_private; | |
ab0e7ff9 | 5331 | file_priv->file = file; |
2e1b8730 | 5332 | INIT_LIST_HEAD(&file_priv->rps.link); |
b29c19b6 CW |
5333 | |
5334 | spin_lock_init(&file_priv->mm.lock); | |
5335 | INIT_LIST_HEAD(&file_priv->mm.request_list); | |
b29c19b6 | 5336 | |
e422b888 BW |
5337 | ret = i915_gem_context_open(dev, file); |
5338 | if (ret) | |
5339 | kfree(file_priv); | |
b29c19b6 | 5340 | |
e422b888 | 5341 | return ret; |
b29c19b6 CW |
5342 | } |
5343 | ||
b680c37a DV |
5344 | /** |
5345 | * i915_gem_track_fb - update frontbuffer tracking | |
5346 | * old: current GEM buffer for the frontbuffer slots | |
5347 | * new: new GEM buffer for the frontbuffer slots | |
5348 | * frontbuffer_bits: bitmask of frontbuffer slots | |
5349 | * | |
5350 | * This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them | |
5351 | * from @old and setting them in @new. Both @old and @new can be NULL. | |
5352 | */ | |
a071fa00 DV |
5353 | void i915_gem_track_fb(struct drm_i915_gem_object *old, |
5354 | struct drm_i915_gem_object *new, | |
5355 | unsigned frontbuffer_bits) | |
5356 | { | |
5357 | if (old) { | |
5358 | WARN_ON(!mutex_is_locked(&old->base.dev->struct_mutex)); | |
5359 | WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits)); | |
5360 | old->frontbuffer_bits &= ~frontbuffer_bits; | |
5361 | } | |
5362 | ||
5363 | if (new) { | |
5364 | WARN_ON(!mutex_is_locked(&new->base.dev->struct_mutex)); | |
5365 | WARN_ON(new->frontbuffer_bits & frontbuffer_bits); | |
5366 | new->frontbuffer_bits |= frontbuffer_bits; | |
5367 | } | |
5368 | } | |
5369 | ||
a70a3148 | 5370 | /* All the new VM stuff */ |
ec7adb6e JL |
5371 | unsigned long |
5372 | i915_gem_obj_offset(struct drm_i915_gem_object *o, | |
5373 | struct i915_address_space *vm) | |
a70a3148 BW |
5374 | { |
5375 | struct drm_i915_private *dev_priv = o->base.dev->dev_private; | |
5376 | struct i915_vma *vma; | |
5377 | ||
896ab1a5 | 5378 | WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base); |
a70a3148 | 5379 | |
a70a3148 | 5380 | list_for_each_entry(vma, &o->vma_list, vma_link) { |
ec7adb6e JL |
5381 | if (i915_is_ggtt(vma->vm) && |
5382 | vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) | |
5383 | continue; | |
5384 | if (vma->vm == vm) | |
a70a3148 | 5385 | return vma->node.start; |
a70a3148 | 5386 | } |
ec7adb6e | 5387 | |
f25748ea DV |
5388 | WARN(1, "%s vma for this object not found.\n", |
5389 | i915_is_ggtt(vm) ? "global" : "ppgtt"); | |
a70a3148 BW |
5390 | return -1; |
5391 | } | |
5392 | ||
ec7adb6e JL |
5393 | unsigned long |
5394 | i915_gem_obj_ggtt_offset_view(struct drm_i915_gem_object *o, | |
9abc4648 | 5395 | const struct i915_ggtt_view *view) |
a70a3148 | 5396 | { |
ec7adb6e | 5397 | struct i915_address_space *ggtt = i915_obj_to_ggtt(o); |
a70a3148 BW |
5398 | struct i915_vma *vma; |
5399 | ||
5400 | list_for_each_entry(vma, &o->vma_list, vma_link) | |
9abc4648 JL |
5401 | if (vma->vm == ggtt && |
5402 | i915_ggtt_view_equal(&vma->ggtt_view, view)) | |
ec7adb6e JL |
5403 | return vma->node.start; |
5404 | ||
5678ad73 | 5405 | WARN(1, "global vma for this object not found. (view=%u)\n", view->type); |
ec7adb6e JL |
5406 | return -1; |
5407 | } | |
5408 | ||
5409 | bool i915_gem_obj_bound(struct drm_i915_gem_object *o, | |
5410 | struct i915_address_space *vm) | |
5411 | { | |
5412 | struct i915_vma *vma; | |
5413 | ||
5414 | list_for_each_entry(vma, &o->vma_list, vma_link) { | |
5415 | if (i915_is_ggtt(vma->vm) && | |
5416 | vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) | |
5417 | continue; | |
5418 | if (vma->vm == vm && drm_mm_node_allocated(&vma->node)) | |
5419 | return true; | |
5420 | } | |
5421 | ||
5422 | return false; | |
5423 | } | |
5424 | ||
5425 | bool i915_gem_obj_ggtt_bound_view(struct drm_i915_gem_object *o, | |
9abc4648 | 5426 | const struct i915_ggtt_view *view) |
ec7adb6e JL |
5427 | { |
5428 | struct i915_address_space *ggtt = i915_obj_to_ggtt(o); | |
5429 | struct i915_vma *vma; | |
5430 | ||
5431 | list_for_each_entry(vma, &o->vma_list, vma_link) | |
5432 | if (vma->vm == ggtt && | |
9abc4648 | 5433 | i915_ggtt_view_equal(&vma->ggtt_view, view) && |
fe14d5f4 | 5434 | drm_mm_node_allocated(&vma->node)) |
a70a3148 BW |
5435 | return true; |
5436 | ||
5437 | return false; | |
5438 | } | |
5439 | ||
5440 | bool i915_gem_obj_bound_any(struct drm_i915_gem_object *o) | |
5441 | { | |
5a1d5eb0 | 5442 | struct i915_vma *vma; |
a70a3148 | 5443 | |
5a1d5eb0 CW |
5444 | list_for_each_entry(vma, &o->vma_list, vma_link) |
5445 | if (drm_mm_node_allocated(&vma->node)) | |
a70a3148 BW |
5446 | return true; |
5447 | ||
5448 | return false; | |
5449 | } | |
5450 | ||
5451 | unsigned long i915_gem_obj_size(struct drm_i915_gem_object *o, | |
5452 | struct i915_address_space *vm) | |
5453 | { | |
5454 | struct drm_i915_private *dev_priv = o->base.dev->dev_private; | |
5455 | struct i915_vma *vma; | |
5456 | ||
896ab1a5 | 5457 | WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base); |
a70a3148 BW |
5458 | |
5459 | BUG_ON(list_empty(&o->vma_list)); | |
5460 | ||
ec7adb6e JL |
5461 | list_for_each_entry(vma, &o->vma_list, vma_link) { |
5462 | if (i915_is_ggtt(vma->vm) && | |
5463 | vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) | |
5464 | continue; | |
a70a3148 BW |
5465 | if (vma->vm == vm) |
5466 | return vma->node.size; | |
ec7adb6e | 5467 | } |
a70a3148 BW |
5468 | return 0; |
5469 | } | |
5470 | ||
ec7adb6e | 5471 | bool i915_gem_obj_is_pinned(struct drm_i915_gem_object *obj) |
5c2abbea BW |
5472 | { |
5473 | struct i915_vma *vma; | |
a6631ae1 | 5474 | list_for_each_entry(vma, &obj->vma_list, vma_link) |
ec7adb6e JL |
5475 | if (vma->pin_count > 0) |
5476 | return true; | |
a6631ae1 | 5477 | |
ec7adb6e | 5478 | return false; |
5c2abbea | 5479 | } |
ea70299d DG |
5480 | |
5481 | /* Allocate a new GEM object and fill it with the supplied data */ | |
5482 | struct drm_i915_gem_object * | |
5483 | i915_gem_object_create_from_data(struct drm_device *dev, | |
5484 | const void *data, size_t size) | |
5485 | { | |
5486 | struct drm_i915_gem_object *obj; | |
5487 | struct sg_table *sg; | |
5488 | size_t bytes; | |
5489 | int ret; | |
5490 | ||
5491 | obj = i915_gem_alloc_object(dev, round_up(size, PAGE_SIZE)); | |
5492 | if (IS_ERR_OR_NULL(obj)) | |
5493 | return obj; | |
5494 | ||
5495 | ret = i915_gem_object_set_to_cpu_domain(obj, true); | |
5496 | if (ret) | |
5497 | goto fail; | |
5498 | ||
5499 | ret = i915_gem_object_get_pages(obj); | |
5500 | if (ret) | |
5501 | goto fail; | |
5502 | ||
5503 | i915_gem_object_pin_pages(obj); | |
5504 | sg = obj->pages; | |
5505 | bytes = sg_copy_from_buffer(sg->sgl, sg->nents, (void *)data, size); | |
5506 | i915_gem_object_unpin_pages(obj); | |
5507 | ||
5508 | if (WARN_ON(bytes != size)) { | |
5509 | DRM_ERROR("Incomplete copy, wrote %zu of %zu", bytes, size); | |
5510 | ret = -EFAULT; | |
5511 | goto fail; | |
5512 | } | |
5513 | ||
5514 | return obj; | |
5515 | ||
5516 | fail: | |
5517 | drm_gem_object_unreference(&obj->base); | |
5518 | return ERR_PTR(ret); | |
5519 | } |