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Commit | Line | Data |
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673a394b EA |
1 | /* |
2 | * Copyright © 2008 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Eric Anholt <eric@anholt.net> | |
25 | * | |
26 | */ | |
27 | ||
760285e7 DH |
28 | #include <drm/drmP.h> |
29 | #include <drm/i915_drm.h> | |
673a394b | 30 | #include "i915_drv.h" |
1c5d22f7 | 31 | #include "i915_trace.h" |
652c393a | 32 | #include "intel_drv.h" |
5949eac4 | 33 | #include <linux/shmem_fs.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
673a394b | 35 | #include <linux/swap.h> |
79e53945 | 36 | #include <linux/pci.h> |
1286ff73 | 37 | #include <linux/dma-buf.h> |
673a394b | 38 | |
05394f39 CW |
39 | static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj); |
40 | static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj); | |
88241785 CW |
41 | static __must_check int i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, |
42 | unsigned alignment, | |
86a1ee26 CW |
43 | bool map_and_fenceable, |
44 | bool nonblocking); | |
05394f39 CW |
45 | static int i915_gem_phys_pwrite(struct drm_device *dev, |
46 | struct drm_i915_gem_object *obj, | |
71acb5eb | 47 | struct drm_i915_gem_pwrite *args, |
05394f39 | 48 | struct drm_file *file); |
673a394b | 49 | |
61050808 CW |
50 | static void i915_gem_write_fence(struct drm_device *dev, int reg, |
51 | struct drm_i915_gem_object *obj); | |
52 | static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, | |
53 | struct drm_i915_fence_reg *fence, | |
54 | bool enable); | |
55 | ||
17250b71 | 56 | static int i915_gem_inactive_shrink(struct shrinker *shrinker, |
1495f230 | 57 | struct shrink_control *sc); |
6c085a72 CW |
58 | static long i915_gem_purge(struct drm_i915_private *dev_priv, long target); |
59 | static void i915_gem_shrink_all(struct drm_i915_private *dev_priv); | |
8c59967c | 60 | static void i915_gem_object_truncate(struct drm_i915_gem_object *obj); |
31169714 | 61 | |
61050808 CW |
62 | static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj) |
63 | { | |
64 | if (obj->tiling_mode) | |
65 | i915_gem_release_mmap(obj); | |
66 | ||
67 | /* As we do not have an associated fence register, we will force | |
68 | * a tiling change if we ever need to acquire one. | |
69 | */ | |
5d82e3e6 | 70 | obj->fence_dirty = false; |
61050808 CW |
71 | obj->fence_reg = I915_FENCE_REG_NONE; |
72 | } | |
73 | ||
73aa808f CW |
74 | /* some bookkeeping */ |
75 | static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv, | |
76 | size_t size) | |
77 | { | |
78 | dev_priv->mm.object_count++; | |
79 | dev_priv->mm.object_memory += size; | |
80 | } | |
81 | ||
82 | static void i915_gem_info_remove_obj(struct drm_i915_private *dev_priv, | |
83 | size_t size) | |
84 | { | |
85 | dev_priv->mm.object_count--; | |
86 | dev_priv->mm.object_memory -= size; | |
87 | } | |
88 | ||
21dd3734 CW |
89 | static int |
90 | i915_gem_wait_for_error(struct drm_device *dev) | |
30dbf0c0 CW |
91 | { |
92 | struct drm_i915_private *dev_priv = dev->dev_private; | |
93 | struct completion *x = &dev_priv->error_completion; | |
94 | unsigned long flags; | |
95 | int ret; | |
96 | ||
97 | if (!atomic_read(&dev_priv->mm.wedged)) | |
98 | return 0; | |
99 | ||
0a6759c6 DV |
100 | /* |
101 | * Only wait 10 seconds for the gpu reset to complete to avoid hanging | |
102 | * userspace. If it takes that long something really bad is going on and | |
103 | * we should simply try to bail out and fail as gracefully as possible. | |
104 | */ | |
105 | ret = wait_for_completion_interruptible_timeout(x, 10*HZ); | |
106 | if (ret == 0) { | |
107 | DRM_ERROR("Timed out waiting for the gpu reset to complete\n"); | |
108 | return -EIO; | |
109 | } else if (ret < 0) { | |
30dbf0c0 | 110 | return ret; |
0a6759c6 | 111 | } |
30dbf0c0 | 112 | |
21dd3734 CW |
113 | if (atomic_read(&dev_priv->mm.wedged)) { |
114 | /* GPU is hung, bump the completion count to account for | |
115 | * the token we just consumed so that we never hit zero and | |
116 | * end up waiting upon a subsequent completion event that | |
117 | * will never happen. | |
118 | */ | |
119 | spin_lock_irqsave(&x->wait.lock, flags); | |
120 | x->done++; | |
121 | spin_unlock_irqrestore(&x->wait.lock, flags); | |
122 | } | |
123 | return 0; | |
30dbf0c0 CW |
124 | } |
125 | ||
54cf91dc | 126 | int i915_mutex_lock_interruptible(struct drm_device *dev) |
76c1dec1 | 127 | { |
76c1dec1 CW |
128 | int ret; |
129 | ||
21dd3734 | 130 | ret = i915_gem_wait_for_error(dev); |
76c1dec1 CW |
131 | if (ret) |
132 | return ret; | |
133 | ||
134 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
135 | if (ret) | |
136 | return ret; | |
137 | ||
23bc5982 | 138 | WARN_ON(i915_verify_lists(dev)); |
76c1dec1 CW |
139 | return 0; |
140 | } | |
30dbf0c0 | 141 | |
7d1c4804 | 142 | static inline bool |
05394f39 | 143 | i915_gem_object_is_inactive(struct drm_i915_gem_object *obj) |
7d1c4804 | 144 | { |
6c085a72 | 145 | return obj->gtt_space && !obj->active; |
7d1c4804 CW |
146 | } |
147 | ||
79e53945 JB |
148 | int |
149 | i915_gem_init_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 150 | struct drm_file *file) |
79e53945 JB |
151 | { |
152 | struct drm_i915_gem_init *args = data; | |
2021746e | 153 | |
7bb6fb8d DV |
154 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
155 | return -ENODEV; | |
156 | ||
2021746e CW |
157 | if (args->gtt_start >= args->gtt_end || |
158 | (args->gtt_end | args->gtt_start) & (PAGE_SIZE - 1)) | |
159 | return -EINVAL; | |
79e53945 | 160 | |
f534bc0b DV |
161 | /* GEM with user mode setting was never supported on ilk and later. */ |
162 | if (INTEL_INFO(dev)->gen >= 5) | |
163 | return -ENODEV; | |
164 | ||
79e53945 | 165 | mutex_lock(&dev->struct_mutex); |
644ec02b DV |
166 | i915_gem_init_global_gtt(dev, args->gtt_start, |
167 | args->gtt_end, args->gtt_end); | |
673a394b EA |
168 | mutex_unlock(&dev->struct_mutex); |
169 | ||
2021746e | 170 | return 0; |
673a394b EA |
171 | } |
172 | ||
5a125c3c EA |
173 | int |
174 | i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 175 | struct drm_file *file) |
5a125c3c | 176 | { |
73aa808f | 177 | struct drm_i915_private *dev_priv = dev->dev_private; |
5a125c3c | 178 | struct drm_i915_gem_get_aperture *args = data; |
6299f992 CW |
179 | struct drm_i915_gem_object *obj; |
180 | size_t pinned; | |
5a125c3c | 181 | |
6299f992 | 182 | pinned = 0; |
73aa808f | 183 | mutex_lock(&dev->struct_mutex); |
6c085a72 | 184 | list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list) |
1b50247a CW |
185 | if (obj->pin_count) |
186 | pinned += obj->gtt_space->size; | |
73aa808f | 187 | mutex_unlock(&dev->struct_mutex); |
5a125c3c | 188 | |
6299f992 | 189 | args->aper_size = dev_priv->mm.gtt_total; |
0206e353 | 190 | args->aper_available_size = args->aper_size - pinned; |
6299f992 | 191 | |
5a125c3c EA |
192 | return 0; |
193 | } | |
194 | ||
ff72145b DA |
195 | static int |
196 | i915_gem_create(struct drm_file *file, | |
197 | struct drm_device *dev, | |
198 | uint64_t size, | |
199 | uint32_t *handle_p) | |
673a394b | 200 | { |
05394f39 | 201 | struct drm_i915_gem_object *obj; |
a1a2d1d3 PP |
202 | int ret; |
203 | u32 handle; | |
673a394b | 204 | |
ff72145b | 205 | size = roundup(size, PAGE_SIZE); |
8ffc0246 CW |
206 | if (size == 0) |
207 | return -EINVAL; | |
673a394b EA |
208 | |
209 | /* Allocate the new object */ | |
ff72145b | 210 | obj = i915_gem_alloc_object(dev, size); |
673a394b EA |
211 | if (obj == NULL) |
212 | return -ENOMEM; | |
213 | ||
05394f39 | 214 | ret = drm_gem_handle_create(file, &obj->base, &handle); |
1dfd9754 | 215 | if (ret) { |
05394f39 CW |
216 | drm_gem_object_release(&obj->base); |
217 | i915_gem_info_remove_obj(dev->dev_private, obj->base.size); | |
202f2fef | 218 | kfree(obj); |
673a394b | 219 | return ret; |
1dfd9754 | 220 | } |
673a394b | 221 | |
202f2fef | 222 | /* drop reference from allocate - handle holds it now */ |
05394f39 | 223 | drm_gem_object_unreference(&obj->base); |
202f2fef CW |
224 | trace_i915_gem_object_create(obj); |
225 | ||
ff72145b | 226 | *handle_p = handle; |
673a394b EA |
227 | return 0; |
228 | } | |
229 | ||
ff72145b DA |
230 | int |
231 | i915_gem_dumb_create(struct drm_file *file, | |
232 | struct drm_device *dev, | |
233 | struct drm_mode_create_dumb *args) | |
234 | { | |
235 | /* have to work out size/pitch and return them */ | |
ed0291fd | 236 | args->pitch = ALIGN(args->width * ((args->bpp + 7) / 8), 64); |
ff72145b DA |
237 | args->size = args->pitch * args->height; |
238 | return i915_gem_create(file, dev, | |
239 | args->size, &args->handle); | |
240 | } | |
241 | ||
242 | int i915_gem_dumb_destroy(struct drm_file *file, | |
243 | struct drm_device *dev, | |
244 | uint32_t handle) | |
245 | { | |
246 | return drm_gem_handle_delete(file, handle); | |
247 | } | |
248 | ||
249 | /** | |
250 | * Creates a new mm object and returns a handle to it. | |
251 | */ | |
252 | int | |
253 | i915_gem_create_ioctl(struct drm_device *dev, void *data, | |
254 | struct drm_file *file) | |
255 | { | |
256 | struct drm_i915_gem_create *args = data; | |
63ed2cb2 | 257 | |
ff72145b DA |
258 | return i915_gem_create(file, dev, |
259 | args->size, &args->handle); | |
260 | } | |
261 | ||
05394f39 | 262 | static int i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj) |
280b713b | 263 | { |
05394f39 | 264 | drm_i915_private_t *dev_priv = obj->base.dev->dev_private; |
280b713b EA |
265 | |
266 | return dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 && | |
05394f39 | 267 | obj->tiling_mode != I915_TILING_NONE; |
280b713b EA |
268 | } |
269 | ||
8461d226 DV |
270 | static inline int |
271 | __copy_to_user_swizzled(char __user *cpu_vaddr, | |
272 | const char *gpu_vaddr, int gpu_offset, | |
273 | int length) | |
274 | { | |
275 | int ret, cpu_offset = 0; | |
276 | ||
277 | while (length > 0) { | |
278 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
279 | int this_length = min(cacheline_end - gpu_offset, length); | |
280 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
281 | ||
282 | ret = __copy_to_user(cpu_vaddr + cpu_offset, | |
283 | gpu_vaddr + swizzled_gpu_offset, | |
284 | this_length); | |
285 | if (ret) | |
286 | return ret + length; | |
287 | ||
288 | cpu_offset += this_length; | |
289 | gpu_offset += this_length; | |
290 | length -= this_length; | |
291 | } | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
8c59967c | 296 | static inline int |
4f0c7cfb BW |
297 | __copy_from_user_swizzled(char *gpu_vaddr, int gpu_offset, |
298 | const char __user *cpu_vaddr, | |
8c59967c DV |
299 | int length) |
300 | { | |
301 | int ret, cpu_offset = 0; | |
302 | ||
303 | while (length > 0) { | |
304 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
305 | int this_length = min(cacheline_end - gpu_offset, length); | |
306 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
307 | ||
308 | ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset, | |
309 | cpu_vaddr + cpu_offset, | |
310 | this_length); | |
311 | if (ret) | |
312 | return ret + length; | |
313 | ||
314 | cpu_offset += this_length; | |
315 | gpu_offset += this_length; | |
316 | length -= this_length; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
d174bd64 DV |
322 | /* Per-page copy function for the shmem pread fastpath. |
323 | * Flushes invalid cachelines before reading the target if | |
324 | * needs_clflush is set. */ | |
eb01459f | 325 | static int |
d174bd64 DV |
326 | shmem_pread_fast(struct page *page, int shmem_page_offset, int page_length, |
327 | char __user *user_data, | |
328 | bool page_do_bit17_swizzling, bool needs_clflush) | |
329 | { | |
330 | char *vaddr; | |
331 | int ret; | |
332 | ||
e7e58eb5 | 333 | if (unlikely(page_do_bit17_swizzling)) |
d174bd64 DV |
334 | return -EINVAL; |
335 | ||
336 | vaddr = kmap_atomic(page); | |
337 | if (needs_clflush) | |
338 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
339 | page_length); | |
340 | ret = __copy_to_user_inatomic(user_data, | |
341 | vaddr + shmem_page_offset, | |
342 | page_length); | |
343 | kunmap_atomic(vaddr); | |
344 | ||
f60d7f0c | 345 | return ret ? -EFAULT : 0; |
d174bd64 DV |
346 | } |
347 | ||
23c18c71 DV |
348 | static void |
349 | shmem_clflush_swizzled_range(char *addr, unsigned long length, | |
350 | bool swizzled) | |
351 | { | |
e7e58eb5 | 352 | if (unlikely(swizzled)) { |
23c18c71 DV |
353 | unsigned long start = (unsigned long) addr; |
354 | unsigned long end = (unsigned long) addr + length; | |
355 | ||
356 | /* For swizzling simply ensure that we always flush both | |
357 | * channels. Lame, but simple and it works. Swizzled | |
358 | * pwrite/pread is far from a hotpath - current userspace | |
359 | * doesn't use it at all. */ | |
360 | start = round_down(start, 128); | |
361 | end = round_up(end, 128); | |
362 | ||
363 | drm_clflush_virt_range((void *)start, end - start); | |
364 | } else { | |
365 | drm_clflush_virt_range(addr, length); | |
366 | } | |
367 | ||
368 | } | |
369 | ||
d174bd64 DV |
370 | /* Only difference to the fast-path function is that this can handle bit17 |
371 | * and uses non-atomic copy and kmap functions. */ | |
372 | static int | |
373 | shmem_pread_slow(struct page *page, int shmem_page_offset, int page_length, | |
374 | char __user *user_data, | |
375 | bool page_do_bit17_swizzling, bool needs_clflush) | |
376 | { | |
377 | char *vaddr; | |
378 | int ret; | |
379 | ||
380 | vaddr = kmap(page); | |
381 | if (needs_clflush) | |
23c18c71 DV |
382 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
383 | page_length, | |
384 | page_do_bit17_swizzling); | |
d174bd64 DV |
385 | |
386 | if (page_do_bit17_swizzling) | |
387 | ret = __copy_to_user_swizzled(user_data, | |
388 | vaddr, shmem_page_offset, | |
389 | page_length); | |
390 | else | |
391 | ret = __copy_to_user(user_data, | |
392 | vaddr + shmem_page_offset, | |
393 | page_length); | |
394 | kunmap(page); | |
395 | ||
f60d7f0c | 396 | return ret ? - EFAULT : 0; |
d174bd64 DV |
397 | } |
398 | ||
eb01459f | 399 | static int |
dbf7bff0 DV |
400 | i915_gem_shmem_pread(struct drm_device *dev, |
401 | struct drm_i915_gem_object *obj, | |
402 | struct drm_i915_gem_pread *args, | |
403 | struct drm_file *file) | |
eb01459f | 404 | { |
8461d226 | 405 | char __user *user_data; |
eb01459f | 406 | ssize_t remain; |
8461d226 | 407 | loff_t offset; |
eb2c0c81 | 408 | int shmem_page_offset, page_length, ret = 0; |
8461d226 | 409 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
dbf7bff0 | 410 | int hit_slowpath = 0; |
96d79b52 | 411 | int prefaulted = 0; |
8489731c | 412 | int needs_clflush = 0; |
9da3da66 CW |
413 | struct scatterlist *sg; |
414 | int i; | |
eb01459f | 415 | |
8461d226 | 416 | user_data = (char __user *) (uintptr_t) args->data_ptr; |
eb01459f EA |
417 | remain = args->size; |
418 | ||
8461d226 | 419 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
eb01459f | 420 | |
8489731c DV |
421 | if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) { |
422 | /* If we're not in the cpu read domain, set ourself into the gtt | |
423 | * read domain and manually flush cachelines (if required). This | |
424 | * optimizes for the case when the gpu will dirty the data | |
425 | * anyway again before the next pread happens. */ | |
426 | if (obj->cache_level == I915_CACHE_NONE) | |
427 | needs_clflush = 1; | |
6c085a72 CW |
428 | if (obj->gtt_space) { |
429 | ret = i915_gem_object_set_to_gtt_domain(obj, false); | |
430 | if (ret) | |
431 | return ret; | |
432 | } | |
8489731c | 433 | } |
eb01459f | 434 | |
f60d7f0c CW |
435 | ret = i915_gem_object_get_pages(obj); |
436 | if (ret) | |
437 | return ret; | |
438 | ||
439 | i915_gem_object_pin_pages(obj); | |
440 | ||
8461d226 | 441 | offset = args->offset; |
eb01459f | 442 | |
9da3da66 | 443 | for_each_sg(obj->pages->sgl, sg, obj->pages->nents, i) { |
e5281ccd CW |
444 | struct page *page; |
445 | ||
9da3da66 CW |
446 | if (i < offset >> PAGE_SHIFT) |
447 | continue; | |
448 | ||
449 | if (remain <= 0) | |
450 | break; | |
451 | ||
eb01459f EA |
452 | /* Operation in this page |
453 | * | |
eb01459f | 454 | * shmem_page_offset = offset within page in shmem file |
eb01459f EA |
455 | * page_length = bytes to copy for this page |
456 | */ | |
c8cbbb8b | 457 | shmem_page_offset = offset_in_page(offset); |
eb01459f EA |
458 | page_length = remain; |
459 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
460 | page_length = PAGE_SIZE - shmem_page_offset; | |
eb01459f | 461 | |
9da3da66 | 462 | page = sg_page(sg); |
8461d226 DV |
463 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
464 | (page_to_phys(page) & (1 << 17)) != 0; | |
465 | ||
d174bd64 DV |
466 | ret = shmem_pread_fast(page, shmem_page_offset, page_length, |
467 | user_data, page_do_bit17_swizzling, | |
468 | needs_clflush); | |
469 | if (ret == 0) | |
470 | goto next_page; | |
dbf7bff0 DV |
471 | |
472 | hit_slowpath = 1; | |
dbf7bff0 DV |
473 | mutex_unlock(&dev->struct_mutex); |
474 | ||
96d79b52 | 475 | if (!prefaulted) { |
f56f821f | 476 | ret = fault_in_multipages_writeable(user_data, remain); |
96d79b52 DV |
477 | /* Userspace is tricking us, but we've already clobbered |
478 | * its pages with the prefault and promised to write the | |
479 | * data up to the first fault. Hence ignore any errors | |
480 | * and just continue. */ | |
481 | (void)ret; | |
482 | prefaulted = 1; | |
483 | } | |
eb01459f | 484 | |
d174bd64 DV |
485 | ret = shmem_pread_slow(page, shmem_page_offset, page_length, |
486 | user_data, page_do_bit17_swizzling, | |
487 | needs_clflush); | |
eb01459f | 488 | |
dbf7bff0 | 489 | mutex_lock(&dev->struct_mutex); |
f60d7f0c | 490 | |
dbf7bff0 | 491 | next_page: |
e5281ccd | 492 | mark_page_accessed(page); |
e5281ccd | 493 | |
f60d7f0c | 494 | if (ret) |
8461d226 | 495 | goto out; |
8461d226 | 496 | |
eb01459f | 497 | remain -= page_length; |
8461d226 | 498 | user_data += page_length; |
eb01459f EA |
499 | offset += page_length; |
500 | } | |
501 | ||
4f27b75d | 502 | out: |
f60d7f0c CW |
503 | i915_gem_object_unpin_pages(obj); |
504 | ||
dbf7bff0 DV |
505 | if (hit_slowpath) { |
506 | /* Fixup: Kill any reinstated backing storage pages */ | |
507 | if (obj->madv == __I915_MADV_PURGED) | |
508 | i915_gem_object_truncate(obj); | |
509 | } | |
eb01459f EA |
510 | |
511 | return ret; | |
512 | } | |
513 | ||
673a394b EA |
514 | /** |
515 | * Reads data from the object referenced by handle. | |
516 | * | |
517 | * On error, the contents of *data are undefined. | |
518 | */ | |
519 | int | |
520 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 521 | struct drm_file *file) |
673a394b EA |
522 | { |
523 | struct drm_i915_gem_pread *args = data; | |
05394f39 | 524 | struct drm_i915_gem_object *obj; |
35b62a89 | 525 | int ret = 0; |
673a394b | 526 | |
51311d0a CW |
527 | if (args->size == 0) |
528 | return 0; | |
529 | ||
530 | if (!access_ok(VERIFY_WRITE, | |
531 | (char __user *)(uintptr_t)args->data_ptr, | |
532 | args->size)) | |
533 | return -EFAULT; | |
534 | ||
4f27b75d | 535 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 536 | if (ret) |
4f27b75d | 537 | return ret; |
673a394b | 538 | |
05394f39 | 539 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 540 | if (&obj->base == NULL) { |
1d7cfea1 CW |
541 | ret = -ENOENT; |
542 | goto unlock; | |
4f27b75d | 543 | } |
673a394b | 544 | |
7dcd2499 | 545 | /* Bounds check source. */ |
05394f39 CW |
546 | if (args->offset > obj->base.size || |
547 | args->size > obj->base.size - args->offset) { | |
ce9d419d | 548 | ret = -EINVAL; |
35b62a89 | 549 | goto out; |
ce9d419d CW |
550 | } |
551 | ||
1286ff73 DV |
552 | /* prime objects have no backing filp to GEM pread/pwrite |
553 | * pages from. | |
554 | */ | |
555 | if (!obj->base.filp) { | |
556 | ret = -EINVAL; | |
557 | goto out; | |
558 | } | |
559 | ||
db53a302 CW |
560 | trace_i915_gem_object_pread(obj, args->offset, args->size); |
561 | ||
dbf7bff0 | 562 | ret = i915_gem_shmem_pread(dev, obj, args, file); |
673a394b | 563 | |
35b62a89 | 564 | out: |
05394f39 | 565 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 566 | unlock: |
4f27b75d | 567 | mutex_unlock(&dev->struct_mutex); |
eb01459f | 568 | return ret; |
673a394b EA |
569 | } |
570 | ||
0839ccb8 KP |
571 | /* This is the fast write path which cannot handle |
572 | * page faults in the source data | |
9b7530cc | 573 | */ |
0839ccb8 KP |
574 | |
575 | static inline int | |
576 | fast_user_write(struct io_mapping *mapping, | |
577 | loff_t page_base, int page_offset, | |
578 | char __user *user_data, | |
579 | int length) | |
9b7530cc | 580 | { |
4f0c7cfb BW |
581 | void __iomem *vaddr_atomic; |
582 | void *vaddr; | |
0839ccb8 | 583 | unsigned long unwritten; |
9b7530cc | 584 | |
3e4d3af5 | 585 | vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base); |
4f0c7cfb BW |
586 | /* We can use the cpu mem copy function because this is X86. */ |
587 | vaddr = (void __force*)vaddr_atomic + page_offset; | |
588 | unwritten = __copy_from_user_inatomic_nocache(vaddr, | |
0839ccb8 | 589 | user_data, length); |
3e4d3af5 | 590 | io_mapping_unmap_atomic(vaddr_atomic); |
fbd5a26d | 591 | return unwritten; |
0839ccb8 KP |
592 | } |
593 | ||
3de09aa3 EA |
594 | /** |
595 | * This is the fast pwrite path, where we copy the data directly from the | |
596 | * user into the GTT, uncached. | |
597 | */ | |
673a394b | 598 | static int |
05394f39 CW |
599 | i915_gem_gtt_pwrite_fast(struct drm_device *dev, |
600 | struct drm_i915_gem_object *obj, | |
3de09aa3 | 601 | struct drm_i915_gem_pwrite *args, |
05394f39 | 602 | struct drm_file *file) |
673a394b | 603 | { |
0839ccb8 | 604 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b | 605 | ssize_t remain; |
0839ccb8 | 606 | loff_t offset, page_base; |
673a394b | 607 | char __user *user_data; |
935aaa69 DV |
608 | int page_offset, page_length, ret; |
609 | ||
86a1ee26 | 610 | ret = i915_gem_object_pin(obj, 0, true, true); |
935aaa69 DV |
611 | if (ret) |
612 | goto out; | |
613 | ||
614 | ret = i915_gem_object_set_to_gtt_domain(obj, true); | |
615 | if (ret) | |
616 | goto out_unpin; | |
617 | ||
618 | ret = i915_gem_object_put_fence(obj); | |
619 | if (ret) | |
620 | goto out_unpin; | |
673a394b EA |
621 | |
622 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
623 | remain = args->size; | |
673a394b | 624 | |
05394f39 | 625 | offset = obj->gtt_offset + args->offset; |
673a394b EA |
626 | |
627 | while (remain > 0) { | |
628 | /* Operation in this page | |
629 | * | |
0839ccb8 KP |
630 | * page_base = page offset within aperture |
631 | * page_offset = offset within page | |
632 | * page_length = bytes to copy for this page | |
673a394b | 633 | */ |
c8cbbb8b CW |
634 | page_base = offset & PAGE_MASK; |
635 | page_offset = offset_in_page(offset); | |
0839ccb8 KP |
636 | page_length = remain; |
637 | if ((page_offset + remain) > PAGE_SIZE) | |
638 | page_length = PAGE_SIZE - page_offset; | |
639 | ||
0839ccb8 | 640 | /* If we get a fault while copying data, then (presumably) our |
3de09aa3 EA |
641 | * source page isn't available. Return the error and we'll |
642 | * retry in the slow path. | |
0839ccb8 | 643 | */ |
fbd5a26d | 644 | if (fast_user_write(dev_priv->mm.gtt_mapping, page_base, |
935aaa69 DV |
645 | page_offset, user_data, page_length)) { |
646 | ret = -EFAULT; | |
647 | goto out_unpin; | |
648 | } | |
673a394b | 649 | |
0839ccb8 KP |
650 | remain -= page_length; |
651 | user_data += page_length; | |
652 | offset += page_length; | |
673a394b | 653 | } |
673a394b | 654 | |
935aaa69 DV |
655 | out_unpin: |
656 | i915_gem_object_unpin(obj); | |
657 | out: | |
3de09aa3 | 658 | return ret; |
673a394b EA |
659 | } |
660 | ||
d174bd64 DV |
661 | /* Per-page copy function for the shmem pwrite fastpath. |
662 | * Flushes invalid cachelines before writing to the target if | |
663 | * needs_clflush_before is set and flushes out any written cachelines after | |
664 | * writing if needs_clflush is set. */ | |
3043c60c | 665 | static int |
d174bd64 DV |
666 | shmem_pwrite_fast(struct page *page, int shmem_page_offset, int page_length, |
667 | char __user *user_data, | |
668 | bool page_do_bit17_swizzling, | |
669 | bool needs_clflush_before, | |
670 | bool needs_clflush_after) | |
673a394b | 671 | { |
d174bd64 | 672 | char *vaddr; |
673a394b | 673 | int ret; |
3de09aa3 | 674 | |
e7e58eb5 | 675 | if (unlikely(page_do_bit17_swizzling)) |
d174bd64 | 676 | return -EINVAL; |
3de09aa3 | 677 | |
d174bd64 DV |
678 | vaddr = kmap_atomic(page); |
679 | if (needs_clflush_before) | |
680 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
681 | page_length); | |
682 | ret = __copy_from_user_inatomic_nocache(vaddr + shmem_page_offset, | |
683 | user_data, | |
684 | page_length); | |
685 | if (needs_clflush_after) | |
686 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
687 | page_length); | |
688 | kunmap_atomic(vaddr); | |
3de09aa3 | 689 | |
755d2218 | 690 | return ret ? -EFAULT : 0; |
3de09aa3 EA |
691 | } |
692 | ||
d174bd64 DV |
693 | /* Only difference to the fast-path function is that this can handle bit17 |
694 | * and uses non-atomic copy and kmap functions. */ | |
3043c60c | 695 | static int |
d174bd64 DV |
696 | shmem_pwrite_slow(struct page *page, int shmem_page_offset, int page_length, |
697 | char __user *user_data, | |
698 | bool page_do_bit17_swizzling, | |
699 | bool needs_clflush_before, | |
700 | bool needs_clflush_after) | |
673a394b | 701 | { |
d174bd64 DV |
702 | char *vaddr; |
703 | int ret; | |
e5281ccd | 704 | |
d174bd64 | 705 | vaddr = kmap(page); |
e7e58eb5 | 706 | if (unlikely(needs_clflush_before || page_do_bit17_swizzling)) |
23c18c71 DV |
707 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
708 | page_length, | |
709 | page_do_bit17_swizzling); | |
d174bd64 DV |
710 | if (page_do_bit17_swizzling) |
711 | ret = __copy_from_user_swizzled(vaddr, shmem_page_offset, | |
e5281ccd CW |
712 | user_data, |
713 | page_length); | |
d174bd64 DV |
714 | else |
715 | ret = __copy_from_user(vaddr + shmem_page_offset, | |
716 | user_data, | |
717 | page_length); | |
718 | if (needs_clflush_after) | |
23c18c71 DV |
719 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
720 | page_length, | |
721 | page_do_bit17_swizzling); | |
d174bd64 | 722 | kunmap(page); |
40123c1f | 723 | |
755d2218 | 724 | return ret ? -EFAULT : 0; |
40123c1f EA |
725 | } |
726 | ||
40123c1f | 727 | static int |
e244a443 DV |
728 | i915_gem_shmem_pwrite(struct drm_device *dev, |
729 | struct drm_i915_gem_object *obj, | |
730 | struct drm_i915_gem_pwrite *args, | |
731 | struct drm_file *file) | |
40123c1f | 732 | { |
40123c1f | 733 | ssize_t remain; |
8c59967c DV |
734 | loff_t offset; |
735 | char __user *user_data; | |
eb2c0c81 | 736 | int shmem_page_offset, page_length, ret = 0; |
8c59967c | 737 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
e244a443 | 738 | int hit_slowpath = 0; |
58642885 DV |
739 | int needs_clflush_after = 0; |
740 | int needs_clflush_before = 0; | |
9da3da66 CW |
741 | int i; |
742 | struct scatterlist *sg; | |
40123c1f | 743 | |
8c59967c | 744 | user_data = (char __user *) (uintptr_t) args->data_ptr; |
40123c1f EA |
745 | remain = args->size; |
746 | ||
8c59967c | 747 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
40123c1f | 748 | |
58642885 DV |
749 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
750 | /* If we're not in the cpu write domain, set ourself into the gtt | |
751 | * write domain and manually flush cachelines (if required). This | |
752 | * optimizes for the case when the gpu will use the data | |
753 | * right away and we therefore have to clflush anyway. */ | |
754 | if (obj->cache_level == I915_CACHE_NONE) | |
755 | needs_clflush_after = 1; | |
6c085a72 CW |
756 | if (obj->gtt_space) { |
757 | ret = i915_gem_object_set_to_gtt_domain(obj, true); | |
758 | if (ret) | |
759 | return ret; | |
760 | } | |
58642885 DV |
761 | } |
762 | /* Same trick applies for invalidate partially written cachelines before | |
763 | * writing. */ | |
764 | if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU) | |
765 | && obj->cache_level == I915_CACHE_NONE) | |
766 | needs_clflush_before = 1; | |
767 | ||
755d2218 CW |
768 | ret = i915_gem_object_get_pages(obj); |
769 | if (ret) | |
770 | return ret; | |
771 | ||
772 | i915_gem_object_pin_pages(obj); | |
773 | ||
673a394b | 774 | offset = args->offset; |
05394f39 | 775 | obj->dirty = 1; |
673a394b | 776 | |
9da3da66 | 777 | for_each_sg(obj->pages->sgl, sg, obj->pages->nents, i) { |
e5281ccd | 778 | struct page *page; |
58642885 | 779 | int partial_cacheline_write; |
e5281ccd | 780 | |
9da3da66 CW |
781 | if (i < offset >> PAGE_SHIFT) |
782 | continue; | |
783 | ||
784 | if (remain <= 0) | |
785 | break; | |
786 | ||
40123c1f EA |
787 | /* Operation in this page |
788 | * | |
40123c1f | 789 | * shmem_page_offset = offset within page in shmem file |
40123c1f EA |
790 | * page_length = bytes to copy for this page |
791 | */ | |
c8cbbb8b | 792 | shmem_page_offset = offset_in_page(offset); |
40123c1f EA |
793 | |
794 | page_length = remain; | |
795 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
796 | page_length = PAGE_SIZE - shmem_page_offset; | |
40123c1f | 797 | |
58642885 DV |
798 | /* If we don't overwrite a cacheline completely we need to be |
799 | * careful to have up-to-date data by first clflushing. Don't | |
800 | * overcomplicate things and flush the entire patch. */ | |
801 | partial_cacheline_write = needs_clflush_before && | |
802 | ((shmem_page_offset | page_length) | |
803 | & (boot_cpu_data.x86_clflush_size - 1)); | |
804 | ||
9da3da66 | 805 | page = sg_page(sg); |
8c59967c DV |
806 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
807 | (page_to_phys(page) & (1 << 17)) != 0; | |
808 | ||
d174bd64 DV |
809 | ret = shmem_pwrite_fast(page, shmem_page_offset, page_length, |
810 | user_data, page_do_bit17_swizzling, | |
811 | partial_cacheline_write, | |
812 | needs_clflush_after); | |
813 | if (ret == 0) | |
814 | goto next_page; | |
e244a443 DV |
815 | |
816 | hit_slowpath = 1; | |
e244a443 | 817 | mutex_unlock(&dev->struct_mutex); |
d174bd64 DV |
818 | ret = shmem_pwrite_slow(page, shmem_page_offset, page_length, |
819 | user_data, page_do_bit17_swizzling, | |
820 | partial_cacheline_write, | |
821 | needs_clflush_after); | |
40123c1f | 822 | |
e244a443 | 823 | mutex_lock(&dev->struct_mutex); |
755d2218 | 824 | |
e244a443 | 825 | next_page: |
e5281ccd CW |
826 | set_page_dirty(page); |
827 | mark_page_accessed(page); | |
e5281ccd | 828 | |
755d2218 | 829 | if (ret) |
8c59967c | 830 | goto out; |
8c59967c | 831 | |
40123c1f | 832 | remain -= page_length; |
8c59967c | 833 | user_data += page_length; |
40123c1f | 834 | offset += page_length; |
673a394b EA |
835 | } |
836 | ||
fbd5a26d | 837 | out: |
755d2218 CW |
838 | i915_gem_object_unpin_pages(obj); |
839 | ||
e244a443 DV |
840 | if (hit_slowpath) { |
841 | /* Fixup: Kill any reinstated backing storage pages */ | |
842 | if (obj->madv == __I915_MADV_PURGED) | |
843 | i915_gem_object_truncate(obj); | |
844 | /* and flush dirty cachelines in case the object isn't in the cpu write | |
845 | * domain anymore. */ | |
846 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) { | |
847 | i915_gem_clflush_object(obj); | |
e76e9aeb | 848 | i915_gem_chipset_flush(dev); |
e244a443 | 849 | } |
8c59967c | 850 | } |
673a394b | 851 | |
58642885 | 852 | if (needs_clflush_after) |
e76e9aeb | 853 | i915_gem_chipset_flush(dev); |
58642885 | 854 | |
40123c1f | 855 | return ret; |
673a394b EA |
856 | } |
857 | ||
858 | /** | |
859 | * Writes data to the object referenced by handle. | |
860 | * | |
861 | * On error, the contents of the buffer that were to be modified are undefined. | |
862 | */ | |
863 | int | |
864 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, | |
fbd5a26d | 865 | struct drm_file *file) |
673a394b EA |
866 | { |
867 | struct drm_i915_gem_pwrite *args = data; | |
05394f39 | 868 | struct drm_i915_gem_object *obj; |
51311d0a CW |
869 | int ret; |
870 | ||
871 | if (args->size == 0) | |
872 | return 0; | |
873 | ||
874 | if (!access_ok(VERIFY_READ, | |
875 | (char __user *)(uintptr_t)args->data_ptr, | |
876 | args->size)) | |
877 | return -EFAULT; | |
878 | ||
f56f821f DV |
879 | ret = fault_in_multipages_readable((char __user *)(uintptr_t)args->data_ptr, |
880 | args->size); | |
51311d0a CW |
881 | if (ret) |
882 | return -EFAULT; | |
673a394b | 883 | |
fbd5a26d | 884 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 885 | if (ret) |
fbd5a26d | 886 | return ret; |
1d7cfea1 | 887 | |
05394f39 | 888 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 889 | if (&obj->base == NULL) { |
1d7cfea1 CW |
890 | ret = -ENOENT; |
891 | goto unlock; | |
fbd5a26d | 892 | } |
673a394b | 893 | |
7dcd2499 | 894 | /* Bounds check destination. */ |
05394f39 CW |
895 | if (args->offset > obj->base.size || |
896 | args->size > obj->base.size - args->offset) { | |
ce9d419d | 897 | ret = -EINVAL; |
35b62a89 | 898 | goto out; |
ce9d419d CW |
899 | } |
900 | ||
1286ff73 DV |
901 | /* prime objects have no backing filp to GEM pread/pwrite |
902 | * pages from. | |
903 | */ | |
904 | if (!obj->base.filp) { | |
905 | ret = -EINVAL; | |
906 | goto out; | |
907 | } | |
908 | ||
db53a302 CW |
909 | trace_i915_gem_object_pwrite(obj, args->offset, args->size); |
910 | ||
935aaa69 | 911 | ret = -EFAULT; |
673a394b EA |
912 | /* We can only do the GTT pwrite on untiled buffers, as otherwise |
913 | * it would end up going through the fenced access, and we'll get | |
914 | * different detiling behavior between reading and writing. | |
915 | * pread/pwrite currently are reading and writing from the CPU | |
916 | * perspective, requiring manual detiling by the client. | |
917 | */ | |
5c0480f2 | 918 | if (obj->phys_obj) { |
fbd5a26d | 919 | ret = i915_gem_phys_pwrite(dev, obj, args, file); |
5c0480f2 DV |
920 | goto out; |
921 | } | |
922 | ||
86a1ee26 | 923 | if (obj->cache_level == I915_CACHE_NONE && |
c07496fa | 924 | obj->tiling_mode == I915_TILING_NONE && |
5c0480f2 | 925 | obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
fbd5a26d | 926 | ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file); |
935aaa69 DV |
927 | /* Note that the gtt paths might fail with non-page-backed user |
928 | * pointers (e.g. gtt mappings when moving data between | |
929 | * textures). Fallback to the shmem path in that case. */ | |
fbd5a26d | 930 | } |
673a394b | 931 | |
86a1ee26 | 932 | if (ret == -EFAULT || ret == -ENOSPC) |
935aaa69 | 933 | ret = i915_gem_shmem_pwrite(dev, obj, args, file); |
5c0480f2 | 934 | |
35b62a89 | 935 | out: |
05394f39 | 936 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 937 | unlock: |
fbd5a26d | 938 | mutex_unlock(&dev->struct_mutex); |
673a394b EA |
939 | return ret; |
940 | } | |
941 | ||
b361237b CW |
942 | int |
943 | i915_gem_check_wedge(struct drm_i915_private *dev_priv, | |
944 | bool interruptible) | |
945 | { | |
946 | if (atomic_read(&dev_priv->mm.wedged)) { | |
947 | struct completion *x = &dev_priv->error_completion; | |
948 | bool recovery_complete; | |
949 | unsigned long flags; | |
950 | ||
951 | /* Give the error handler a chance to run. */ | |
952 | spin_lock_irqsave(&x->wait.lock, flags); | |
953 | recovery_complete = x->done > 0; | |
954 | spin_unlock_irqrestore(&x->wait.lock, flags); | |
955 | ||
956 | /* Non-interruptible callers can't handle -EAGAIN, hence return | |
957 | * -EIO unconditionally for these. */ | |
958 | if (!interruptible) | |
959 | return -EIO; | |
960 | ||
961 | /* Recovery complete, but still wedged means reset failure. */ | |
962 | if (recovery_complete) | |
963 | return -EIO; | |
964 | ||
965 | return -EAGAIN; | |
966 | } | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
971 | /* | |
972 | * Compare seqno against outstanding lazy request. Emit a request if they are | |
973 | * equal. | |
974 | */ | |
975 | static int | |
976 | i915_gem_check_olr(struct intel_ring_buffer *ring, u32 seqno) | |
977 | { | |
978 | int ret; | |
979 | ||
980 | BUG_ON(!mutex_is_locked(&ring->dev->struct_mutex)); | |
981 | ||
982 | ret = 0; | |
983 | if (seqno == ring->outstanding_lazy_request) | |
984 | ret = i915_add_request(ring, NULL, NULL); | |
985 | ||
986 | return ret; | |
987 | } | |
988 | ||
989 | /** | |
990 | * __wait_seqno - wait until execution of seqno has finished | |
991 | * @ring: the ring expected to report seqno | |
992 | * @seqno: duh! | |
993 | * @interruptible: do an interruptible wait (normally yes) | |
994 | * @timeout: in - how long to wait (NULL forever); out - how much time remaining | |
995 | * | |
996 | * Returns 0 if the seqno was found within the alloted time. Else returns the | |
997 | * errno with remaining time filled in timeout argument. | |
998 | */ | |
999 | static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno, | |
1000 | bool interruptible, struct timespec *timeout) | |
1001 | { | |
1002 | drm_i915_private_t *dev_priv = ring->dev->dev_private; | |
1003 | struct timespec before, now, wait_time={1,0}; | |
1004 | unsigned long timeout_jiffies; | |
1005 | long end; | |
1006 | bool wait_forever = true; | |
1007 | int ret; | |
1008 | ||
1009 | if (i915_seqno_passed(ring->get_seqno(ring, true), seqno)) | |
1010 | return 0; | |
1011 | ||
1012 | trace_i915_gem_request_wait_begin(ring, seqno); | |
1013 | ||
1014 | if (timeout != NULL) { | |
1015 | wait_time = *timeout; | |
1016 | wait_forever = false; | |
1017 | } | |
1018 | ||
1019 | timeout_jiffies = timespec_to_jiffies(&wait_time); | |
1020 | ||
1021 | if (WARN_ON(!ring->irq_get(ring))) | |
1022 | return -ENODEV; | |
1023 | ||
1024 | /* Record current time in case interrupted by signal, or wedged * */ | |
1025 | getrawmonotonic(&before); | |
1026 | ||
1027 | #define EXIT_COND \ | |
1028 | (i915_seqno_passed(ring->get_seqno(ring, false), seqno) || \ | |
1029 | atomic_read(&dev_priv->mm.wedged)) | |
1030 | do { | |
1031 | if (interruptible) | |
1032 | end = wait_event_interruptible_timeout(ring->irq_queue, | |
1033 | EXIT_COND, | |
1034 | timeout_jiffies); | |
1035 | else | |
1036 | end = wait_event_timeout(ring->irq_queue, EXIT_COND, | |
1037 | timeout_jiffies); | |
1038 | ||
1039 | ret = i915_gem_check_wedge(dev_priv, interruptible); | |
1040 | if (ret) | |
1041 | end = ret; | |
1042 | } while (end == 0 && wait_forever); | |
1043 | ||
1044 | getrawmonotonic(&now); | |
1045 | ||
1046 | ring->irq_put(ring); | |
1047 | trace_i915_gem_request_wait_end(ring, seqno); | |
1048 | #undef EXIT_COND | |
1049 | ||
1050 | if (timeout) { | |
1051 | struct timespec sleep_time = timespec_sub(now, before); | |
1052 | *timeout = timespec_sub(*timeout, sleep_time); | |
1053 | } | |
1054 | ||
1055 | switch (end) { | |
1056 | case -EIO: | |
1057 | case -EAGAIN: /* Wedged */ | |
1058 | case -ERESTARTSYS: /* Signal */ | |
1059 | return (int)end; | |
1060 | case 0: /* Timeout */ | |
1061 | if (timeout) | |
1062 | set_normalized_timespec(timeout, 0, 0); | |
1063 | return -ETIME; | |
1064 | default: /* Completed */ | |
1065 | WARN_ON(end < 0); /* We're not aware of other errors */ | |
1066 | return 0; | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | /** | |
1071 | * Waits for a sequence number to be signaled, and cleans up the | |
1072 | * request and object lists appropriately for that event. | |
1073 | */ | |
1074 | int | |
1075 | i915_wait_seqno(struct intel_ring_buffer *ring, uint32_t seqno) | |
1076 | { | |
1077 | struct drm_device *dev = ring->dev; | |
1078 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1079 | bool interruptible = dev_priv->mm.interruptible; | |
1080 | int ret; | |
1081 | ||
1082 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); | |
1083 | BUG_ON(seqno == 0); | |
1084 | ||
1085 | ret = i915_gem_check_wedge(dev_priv, interruptible); | |
1086 | if (ret) | |
1087 | return ret; | |
1088 | ||
1089 | ret = i915_gem_check_olr(ring, seqno); | |
1090 | if (ret) | |
1091 | return ret; | |
1092 | ||
1093 | return __wait_seqno(ring, seqno, interruptible, NULL); | |
1094 | } | |
1095 | ||
1096 | /** | |
1097 | * Ensures that all rendering to the object has completed and the object is | |
1098 | * safe to unbind from the GTT or access from the CPU. | |
1099 | */ | |
1100 | static __must_check int | |
1101 | i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj, | |
1102 | bool readonly) | |
1103 | { | |
1104 | struct intel_ring_buffer *ring = obj->ring; | |
1105 | u32 seqno; | |
1106 | int ret; | |
1107 | ||
1108 | seqno = readonly ? obj->last_write_seqno : obj->last_read_seqno; | |
1109 | if (seqno == 0) | |
1110 | return 0; | |
1111 | ||
1112 | ret = i915_wait_seqno(ring, seqno); | |
1113 | if (ret) | |
1114 | return ret; | |
1115 | ||
1116 | i915_gem_retire_requests_ring(ring); | |
1117 | ||
1118 | /* Manually manage the write flush as we may have not yet | |
1119 | * retired the buffer. | |
1120 | */ | |
1121 | if (obj->last_write_seqno && | |
1122 | i915_seqno_passed(seqno, obj->last_write_seqno)) { | |
1123 | obj->last_write_seqno = 0; | |
1124 | obj->base.write_domain &= ~I915_GEM_GPU_DOMAINS; | |
1125 | } | |
1126 | ||
1127 | return 0; | |
1128 | } | |
1129 | ||
3236f57a CW |
1130 | /* A nonblocking variant of the above wait. This is a highly dangerous routine |
1131 | * as the object state may change during this call. | |
1132 | */ | |
1133 | static __must_check int | |
1134 | i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj, | |
1135 | bool readonly) | |
1136 | { | |
1137 | struct drm_device *dev = obj->base.dev; | |
1138 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1139 | struct intel_ring_buffer *ring = obj->ring; | |
1140 | u32 seqno; | |
1141 | int ret; | |
1142 | ||
1143 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); | |
1144 | BUG_ON(!dev_priv->mm.interruptible); | |
1145 | ||
1146 | seqno = readonly ? obj->last_write_seqno : obj->last_read_seqno; | |
1147 | if (seqno == 0) | |
1148 | return 0; | |
1149 | ||
1150 | ret = i915_gem_check_wedge(dev_priv, true); | |
1151 | if (ret) | |
1152 | return ret; | |
1153 | ||
1154 | ret = i915_gem_check_olr(ring, seqno); | |
1155 | if (ret) | |
1156 | return ret; | |
1157 | ||
1158 | mutex_unlock(&dev->struct_mutex); | |
1159 | ret = __wait_seqno(ring, seqno, true, NULL); | |
1160 | mutex_lock(&dev->struct_mutex); | |
1161 | ||
1162 | i915_gem_retire_requests_ring(ring); | |
1163 | ||
1164 | /* Manually manage the write flush as we may have not yet | |
1165 | * retired the buffer. | |
1166 | */ | |
1167 | if (obj->last_write_seqno && | |
1168 | i915_seqno_passed(seqno, obj->last_write_seqno)) { | |
1169 | obj->last_write_seqno = 0; | |
1170 | obj->base.write_domain &= ~I915_GEM_GPU_DOMAINS; | |
1171 | } | |
1172 | ||
1173 | return ret; | |
1174 | } | |
1175 | ||
673a394b | 1176 | /** |
2ef7eeaa EA |
1177 | * Called when user space prepares to use an object with the CPU, either |
1178 | * through the mmap ioctl's mapping or a GTT mapping. | |
673a394b EA |
1179 | */ |
1180 | int | |
1181 | i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1182 | struct drm_file *file) |
673a394b EA |
1183 | { |
1184 | struct drm_i915_gem_set_domain *args = data; | |
05394f39 | 1185 | struct drm_i915_gem_object *obj; |
2ef7eeaa EA |
1186 | uint32_t read_domains = args->read_domains; |
1187 | uint32_t write_domain = args->write_domain; | |
673a394b EA |
1188 | int ret; |
1189 | ||
2ef7eeaa | 1190 | /* Only handle setting domains to types used by the CPU. */ |
21d509e3 | 1191 | if (write_domain & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
1192 | return -EINVAL; |
1193 | ||
21d509e3 | 1194 | if (read_domains & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
1195 | return -EINVAL; |
1196 | ||
1197 | /* Having something in the write domain implies it's in the read | |
1198 | * domain, and only that read domain. Enforce that in the request. | |
1199 | */ | |
1200 | if (write_domain != 0 && read_domains != write_domain) | |
1201 | return -EINVAL; | |
1202 | ||
76c1dec1 | 1203 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1204 | if (ret) |
76c1dec1 | 1205 | return ret; |
1d7cfea1 | 1206 | |
05394f39 | 1207 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 1208 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1209 | ret = -ENOENT; |
1210 | goto unlock; | |
76c1dec1 | 1211 | } |
673a394b | 1212 | |
3236f57a CW |
1213 | /* Try to flush the object off the GPU without holding the lock. |
1214 | * We will repeat the flush holding the lock in the normal manner | |
1215 | * to catch cases where we are gazumped. | |
1216 | */ | |
1217 | ret = i915_gem_object_wait_rendering__nonblocking(obj, !write_domain); | |
1218 | if (ret) | |
1219 | goto unref; | |
1220 | ||
2ef7eeaa EA |
1221 | if (read_domains & I915_GEM_DOMAIN_GTT) { |
1222 | ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0); | |
02354392 EA |
1223 | |
1224 | /* Silently promote "you're not bound, there was nothing to do" | |
1225 | * to success, since the client was just asking us to | |
1226 | * make sure everything was done. | |
1227 | */ | |
1228 | if (ret == -EINVAL) | |
1229 | ret = 0; | |
2ef7eeaa | 1230 | } else { |
e47c68e9 | 1231 | ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0); |
2ef7eeaa EA |
1232 | } |
1233 | ||
3236f57a | 1234 | unref: |
05394f39 | 1235 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1236 | unlock: |
673a394b EA |
1237 | mutex_unlock(&dev->struct_mutex); |
1238 | return ret; | |
1239 | } | |
1240 | ||
1241 | /** | |
1242 | * Called when user space has done writes to this buffer | |
1243 | */ | |
1244 | int | |
1245 | i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1246 | struct drm_file *file) |
673a394b EA |
1247 | { |
1248 | struct drm_i915_gem_sw_finish *args = data; | |
05394f39 | 1249 | struct drm_i915_gem_object *obj; |
673a394b EA |
1250 | int ret = 0; |
1251 | ||
76c1dec1 | 1252 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1253 | if (ret) |
76c1dec1 | 1254 | return ret; |
1d7cfea1 | 1255 | |
05394f39 | 1256 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 1257 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1258 | ret = -ENOENT; |
1259 | goto unlock; | |
673a394b EA |
1260 | } |
1261 | ||
673a394b | 1262 | /* Pinned buffers may be scanout, so flush the cache */ |
05394f39 | 1263 | if (obj->pin_count) |
e47c68e9 EA |
1264 | i915_gem_object_flush_cpu_write_domain(obj); |
1265 | ||
05394f39 | 1266 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1267 | unlock: |
673a394b EA |
1268 | mutex_unlock(&dev->struct_mutex); |
1269 | return ret; | |
1270 | } | |
1271 | ||
1272 | /** | |
1273 | * Maps the contents of an object, returning the address it is mapped | |
1274 | * into. | |
1275 | * | |
1276 | * While the mapping holds a reference on the contents of the object, it doesn't | |
1277 | * imply a ref on the object itself. | |
1278 | */ | |
1279 | int | |
1280 | i915_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1281 | struct drm_file *file) |
673a394b EA |
1282 | { |
1283 | struct drm_i915_gem_mmap *args = data; | |
1284 | struct drm_gem_object *obj; | |
673a394b EA |
1285 | unsigned long addr; |
1286 | ||
05394f39 | 1287 | obj = drm_gem_object_lookup(dev, file, args->handle); |
673a394b | 1288 | if (obj == NULL) |
bf79cb91 | 1289 | return -ENOENT; |
673a394b | 1290 | |
1286ff73 DV |
1291 | /* prime objects have no backing filp to GEM mmap |
1292 | * pages from. | |
1293 | */ | |
1294 | if (!obj->filp) { | |
1295 | drm_gem_object_unreference_unlocked(obj); | |
1296 | return -EINVAL; | |
1297 | } | |
1298 | ||
6be5ceb0 | 1299 | addr = vm_mmap(obj->filp, 0, args->size, |
673a394b EA |
1300 | PROT_READ | PROT_WRITE, MAP_SHARED, |
1301 | args->offset); | |
bc9025bd | 1302 | drm_gem_object_unreference_unlocked(obj); |
673a394b EA |
1303 | if (IS_ERR((void *)addr)) |
1304 | return addr; | |
1305 | ||
1306 | args->addr_ptr = (uint64_t) addr; | |
1307 | ||
1308 | return 0; | |
1309 | } | |
1310 | ||
de151cf6 JB |
1311 | /** |
1312 | * i915_gem_fault - fault a page into the GTT | |
1313 | * vma: VMA in question | |
1314 | * vmf: fault info | |
1315 | * | |
1316 | * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped | |
1317 | * from userspace. The fault handler takes care of binding the object to | |
1318 | * the GTT (if needed), allocating and programming a fence register (again, | |
1319 | * only if needed based on whether the old reg is still valid or the object | |
1320 | * is tiled) and inserting a new PTE into the faulting process. | |
1321 | * | |
1322 | * Note that the faulting process may involve evicting existing objects | |
1323 | * from the GTT and/or fence registers to make room. So performance may | |
1324 | * suffer if the GTT working set is large or there are few fence registers | |
1325 | * left. | |
1326 | */ | |
1327 | int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1328 | { | |
05394f39 CW |
1329 | struct drm_i915_gem_object *obj = to_intel_bo(vma->vm_private_data); |
1330 | struct drm_device *dev = obj->base.dev; | |
7d1c4804 | 1331 | drm_i915_private_t *dev_priv = dev->dev_private; |
de151cf6 JB |
1332 | pgoff_t page_offset; |
1333 | unsigned long pfn; | |
1334 | int ret = 0; | |
0f973f27 | 1335 | bool write = !!(vmf->flags & FAULT_FLAG_WRITE); |
de151cf6 JB |
1336 | |
1337 | /* We don't use vmf->pgoff since that has the fake offset */ | |
1338 | page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> | |
1339 | PAGE_SHIFT; | |
1340 | ||
d9bc7e9f CW |
1341 | ret = i915_mutex_lock_interruptible(dev); |
1342 | if (ret) | |
1343 | goto out; | |
a00b10c3 | 1344 | |
db53a302 CW |
1345 | trace_i915_gem_object_fault(obj, page_offset, true, write); |
1346 | ||
d9bc7e9f | 1347 | /* Now bind it into the GTT if needed */ |
919926ae CW |
1348 | if (!obj->map_and_fenceable) { |
1349 | ret = i915_gem_object_unbind(obj); | |
1350 | if (ret) | |
1351 | goto unlock; | |
a00b10c3 | 1352 | } |
05394f39 | 1353 | if (!obj->gtt_space) { |
86a1ee26 | 1354 | ret = i915_gem_object_bind_to_gtt(obj, 0, true, false); |
c715089f CW |
1355 | if (ret) |
1356 | goto unlock; | |
de151cf6 | 1357 | |
e92d03bf EA |
1358 | ret = i915_gem_object_set_to_gtt_domain(obj, write); |
1359 | if (ret) | |
1360 | goto unlock; | |
1361 | } | |
4a684a41 | 1362 | |
74898d7e DV |
1363 | if (!obj->has_global_gtt_mapping) |
1364 | i915_gem_gtt_bind_object(obj, obj->cache_level); | |
1365 | ||
06d98131 | 1366 | ret = i915_gem_object_get_fence(obj); |
d9e86c0e CW |
1367 | if (ret) |
1368 | goto unlock; | |
de151cf6 | 1369 | |
05394f39 CW |
1370 | if (i915_gem_object_is_inactive(obj)) |
1371 | list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list); | |
7d1c4804 | 1372 | |
6299f992 CW |
1373 | obj->fault_mappable = true; |
1374 | ||
dd2757f8 | 1375 | pfn = ((dev_priv->mm.gtt_base_addr + obj->gtt_offset) >> PAGE_SHIFT) + |
de151cf6 JB |
1376 | page_offset; |
1377 | ||
1378 | /* Finally, remap it using the new GTT offset */ | |
1379 | ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn); | |
c715089f | 1380 | unlock: |
de151cf6 | 1381 | mutex_unlock(&dev->struct_mutex); |
d9bc7e9f | 1382 | out: |
de151cf6 | 1383 | switch (ret) { |
d9bc7e9f | 1384 | case -EIO: |
a9340cca DV |
1385 | /* If this -EIO is due to a gpu hang, give the reset code a |
1386 | * chance to clean up the mess. Otherwise return the proper | |
1387 | * SIGBUS. */ | |
1388 | if (!atomic_read(&dev_priv->mm.wedged)) | |
1389 | return VM_FAULT_SIGBUS; | |
045e769a | 1390 | case -EAGAIN: |
d9bc7e9f CW |
1391 | /* Give the error handler a chance to run and move the |
1392 | * objects off the GPU active list. Next time we service the | |
1393 | * fault, we should be able to transition the page into the | |
1394 | * GTT without touching the GPU (and so avoid further | |
1395 | * EIO/EGAIN). If the GPU is wedged, then there is no issue | |
1396 | * with coherency, just lost writes. | |
1397 | */ | |
045e769a | 1398 | set_need_resched(); |
c715089f CW |
1399 | case 0: |
1400 | case -ERESTARTSYS: | |
bed636ab | 1401 | case -EINTR: |
e79e0fe3 DR |
1402 | case -EBUSY: |
1403 | /* | |
1404 | * EBUSY is ok: this just means that another thread | |
1405 | * already did the job. | |
1406 | */ | |
c715089f | 1407 | return VM_FAULT_NOPAGE; |
de151cf6 | 1408 | case -ENOMEM: |
de151cf6 | 1409 | return VM_FAULT_OOM; |
a7c2e1aa DV |
1410 | case -ENOSPC: |
1411 | return VM_FAULT_SIGBUS; | |
de151cf6 | 1412 | default: |
a7c2e1aa | 1413 | WARN_ONCE(ret, "unhandled error in i915_gem_fault: %i\n", ret); |
c715089f | 1414 | return VM_FAULT_SIGBUS; |
de151cf6 JB |
1415 | } |
1416 | } | |
1417 | ||
901782b2 CW |
1418 | /** |
1419 | * i915_gem_release_mmap - remove physical page mappings | |
1420 | * @obj: obj in question | |
1421 | * | |
af901ca1 | 1422 | * Preserve the reservation of the mmapping with the DRM core code, but |
901782b2 CW |
1423 | * relinquish ownership of the pages back to the system. |
1424 | * | |
1425 | * It is vital that we remove the page mapping if we have mapped a tiled | |
1426 | * object through the GTT and then lose the fence register due to | |
1427 | * resource pressure. Similarly if the object has been moved out of the | |
1428 | * aperture, than pages mapped into userspace must be revoked. Removing the | |
1429 | * mapping will then trigger a page fault on the next user access, allowing | |
1430 | * fixup by i915_gem_fault(). | |
1431 | */ | |
d05ca301 | 1432 | void |
05394f39 | 1433 | i915_gem_release_mmap(struct drm_i915_gem_object *obj) |
901782b2 | 1434 | { |
6299f992 CW |
1435 | if (!obj->fault_mappable) |
1436 | return; | |
901782b2 | 1437 | |
f6e47884 CW |
1438 | if (obj->base.dev->dev_mapping) |
1439 | unmap_mapping_range(obj->base.dev->dev_mapping, | |
1440 | (loff_t)obj->base.map_list.hash.key<<PAGE_SHIFT, | |
1441 | obj->base.size, 1); | |
fb7d516a | 1442 | |
6299f992 | 1443 | obj->fault_mappable = false; |
901782b2 CW |
1444 | } |
1445 | ||
92b88aeb | 1446 | static uint32_t |
e28f8711 | 1447 | i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode) |
92b88aeb | 1448 | { |
e28f8711 | 1449 | uint32_t gtt_size; |
92b88aeb CW |
1450 | |
1451 | if (INTEL_INFO(dev)->gen >= 4 || | |
e28f8711 CW |
1452 | tiling_mode == I915_TILING_NONE) |
1453 | return size; | |
92b88aeb CW |
1454 | |
1455 | /* Previous chips need a power-of-two fence region when tiling */ | |
1456 | if (INTEL_INFO(dev)->gen == 3) | |
e28f8711 | 1457 | gtt_size = 1024*1024; |
92b88aeb | 1458 | else |
e28f8711 | 1459 | gtt_size = 512*1024; |
92b88aeb | 1460 | |
e28f8711 CW |
1461 | while (gtt_size < size) |
1462 | gtt_size <<= 1; | |
92b88aeb | 1463 | |
e28f8711 | 1464 | return gtt_size; |
92b88aeb CW |
1465 | } |
1466 | ||
de151cf6 JB |
1467 | /** |
1468 | * i915_gem_get_gtt_alignment - return required GTT alignment for an object | |
1469 | * @obj: object to check | |
1470 | * | |
1471 | * Return the required GTT alignment for an object, taking into account | |
5e783301 | 1472 | * potential fence register mapping. |
de151cf6 JB |
1473 | */ |
1474 | static uint32_t | |
e28f8711 CW |
1475 | i915_gem_get_gtt_alignment(struct drm_device *dev, |
1476 | uint32_t size, | |
1477 | int tiling_mode) | |
de151cf6 | 1478 | { |
de151cf6 JB |
1479 | /* |
1480 | * Minimum alignment is 4k (GTT page size), but might be greater | |
1481 | * if a fence register is needed for the object. | |
1482 | */ | |
a00b10c3 | 1483 | if (INTEL_INFO(dev)->gen >= 4 || |
e28f8711 | 1484 | tiling_mode == I915_TILING_NONE) |
de151cf6 JB |
1485 | return 4096; |
1486 | ||
a00b10c3 CW |
1487 | /* |
1488 | * Previous chips need to be aligned to the size of the smallest | |
1489 | * fence register that can contain the object. | |
1490 | */ | |
e28f8711 | 1491 | return i915_gem_get_gtt_size(dev, size, tiling_mode); |
a00b10c3 CW |
1492 | } |
1493 | ||
5e783301 DV |
1494 | /** |
1495 | * i915_gem_get_unfenced_gtt_alignment - return required GTT alignment for an | |
1496 | * unfenced object | |
e28f8711 CW |
1497 | * @dev: the device |
1498 | * @size: size of the object | |
1499 | * @tiling_mode: tiling mode of the object | |
5e783301 DV |
1500 | * |
1501 | * Return the required GTT alignment for an object, only taking into account | |
1502 | * unfenced tiled surface requirements. | |
1503 | */ | |
467cffba | 1504 | uint32_t |
e28f8711 CW |
1505 | i915_gem_get_unfenced_gtt_alignment(struct drm_device *dev, |
1506 | uint32_t size, | |
1507 | int tiling_mode) | |
5e783301 | 1508 | { |
5e783301 DV |
1509 | /* |
1510 | * Minimum alignment is 4k (GTT page size) for sane hw. | |
1511 | */ | |
1512 | if (INTEL_INFO(dev)->gen >= 4 || IS_G33(dev) || | |
e28f8711 | 1513 | tiling_mode == I915_TILING_NONE) |
5e783301 DV |
1514 | return 4096; |
1515 | ||
e28f8711 CW |
1516 | /* Previous hardware however needs to be aligned to a power-of-two |
1517 | * tile height. The simplest method for determining this is to reuse | |
1518 | * the power-of-tile object size. | |
5e783301 | 1519 | */ |
e28f8711 | 1520 | return i915_gem_get_gtt_size(dev, size, tiling_mode); |
5e783301 DV |
1521 | } |
1522 | ||
d8cb5086 CW |
1523 | static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj) |
1524 | { | |
1525 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
1526 | int ret; | |
1527 | ||
1528 | if (obj->base.map_list.map) | |
1529 | return 0; | |
1530 | ||
1531 | ret = drm_gem_create_mmap_offset(&obj->base); | |
1532 | if (ret != -ENOSPC) | |
1533 | return ret; | |
1534 | ||
1535 | /* Badly fragmented mmap space? The only way we can recover | |
1536 | * space is by destroying unwanted objects. We can't randomly release | |
1537 | * mmap_offsets as userspace expects them to be persistent for the | |
1538 | * lifetime of the objects. The closest we can is to release the | |
1539 | * offsets on purgeable objects by truncating it and marking it purged, | |
1540 | * which prevents userspace from ever using that object again. | |
1541 | */ | |
1542 | i915_gem_purge(dev_priv, obj->base.size >> PAGE_SHIFT); | |
1543 | ret = drm_gem_create_mmap_offset(&obj->base); | |
1544 | if (ret != -ENOSPC) | |
1545 | return ret; | |
1546 | ||
1547 | i915_gem_shrink_all(dev_priv); | |
1548 | return drm_gem_create_mmap_offset(&obj->base); | |
1549 | } | |
1550 | ||
1551 | static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object *obj) | |
1552 | { | |
1553 | if (!obj->base.map_list.map) | |
1554 | return; | |
1555 | ||
1556 | drm_gem_free_mmap_offset(&obj->base); | |
1557 | } | |
1558 | ||
de151cf6 | 1559 | int |
ff72145b DA |
1560 | i915_gem_mmap_gtt(struct drm_file *file, |
1561 | struct drm_device *dev, | |
1562 | uint32_t handle, | |
1563 | uint64_t *offset) | |
de151cf6 | 1564 | { |
da761a6e | 1565 | struct drm_i915_private *dev_priv = dev->dev_private; |
05394f39 | 1566 | struct drm_i915_gem_object *obj; |
de151cf6 JB |
1567 | int ret; |
1568 | ||
76c1dec1 | 1569 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1570 | if (ret) |
76c1dec1 | 1571 | return ret; |
de151cf6 | 1572 | |
ff72145b | 1573 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle)); |
c8725226 | 1574 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1575 | ret = -ENOENT; |
1576 | goto unlock; | |
1577 | } | |
de151cf6 | 1578 | |
05394f39 | 1579 | if (obj->base.size > dev_priv->mm.gtt_mappable_end) { |
da761a6e | 1580 | ret = -E2BIG; |
ff56b0bc | 1581 | goto out; |
da761a6e CW |
1582 | } |
1583 | ||
05394f39 | 1584 | if (obj->madv != I915_MADV_WILLNEED) { |
ab18282d | 1585 | DRM_ERROR("Attempting to mmap a purgeable buffer\n"); |
1d7cfea1 CW |
1586 | ret = -EINVAL; |
1587 | goto out; | |
ab18282d CW |
1588 | } |
1589 | ||
d8cb5086 CW |
1590 | ret = i915_gem_object_create_mmap_offset(obj); |
1591 | if (ret) | |
1592 | goto out; | |
de151cf6 | 1593 | |
ff72145b | 1594 | *offset = (u64)obj->base.map_list.hash.key << PAGE_SHIFT; |
de151cf6 | 1595 | |
1d7cfea1 | 1596 | out: |
05394f39 | 1597 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1598 | unlock: |
de151cf6 | 1599 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 1600 | return ret; |
de151cf6 JB |
1601 | } |
1602 | ||
ff72145b DA |
1603 | /** |
1604 | * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing | |
1605 | * @dev: DRM device | |
1606 | * @data: GTT mapping ioctl data | |
1607 | * @file: GEM object info | |
1608 | * | |
1609 | * Simply returns the fake offset to userspace so it can mmap it. | |
1610 | * The mmap call will end up in drm_gem_mmap(), which will set things | |
1611 | * up so we can get faults in the handler above. | |
1612 | * | |
1613 | * The fault handler will take care of binding the object into the GTT | |
1614 | * (since it may have been evicted to make room for something), allocating | |
1615 | * a fence register, and mapping the appropriate aperture address into | |
1616 | * userspace. | |
1617 | */ | |
1618 | int | |
1619 | i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, | |
1620 | struct drm_file *file) | |
1621 | { | |
1622 | struct drm_i915_gem_mmap_gtt *args = data; | |
1623 | ||
ff72145b DA |
1624 | return i915_gem_mmap_gtt(file, dev, args->handle, &args->offset); |
1625 | } | |
1626 | ||
225067ee DV |
1627 | /* Immediately discard the backing storage */ |
1628 | static void | |
1629 | i915_gem_object_truncate(struct drm_i915_gem_object *obj) | |
e5281ccd | 1630 | { |
e5281ccd | 1631 | struct inode *inode; |
e5281ccd | 1632 | |
4d6294bf | 1633 | i915_gem_object_free_mmap_offset(obj); |
1286ff73 | 1634 | |
4d6294bf CW |
1635 | if (obj->base.filp == NULL) |
1636 | return; | |
e5281ccd | 1637 | |
225067ee DV |
1638 | /* Our goal here is to return as much of the memory as |
1639 | * is possible back to the system as we are called from OOM. | |
1640 | * To do this we must instruct the shmfs to drop all of its | |
1641 | * backing pages, *now*. | |
1642 | */ | |
05394f39 | 1643 | inode = obj->base.filp->f_path.dentry->d_inode; |
225067ee | 1644 | shmem_truncate_range(inode, 0, (loff_t)-1); |
e5281ccd | 1645 | |
225067ee DV |
1646 | obj->madv = __I915_MADV_PURGED; |
1647 | } | |
e5281ccd | 1648 | |
225067ee DV |
1649 | static inline int |
1650 | i915_gem_object_is_purgeable(struct drm_i915_gem_object *obj) | |
1651 | { | |
1652 | return obj->madv == I915_MADV_DONTNEED; | |
e5281ccd CW |
1653 | } |
1654 | ||
5cdf5881 | 1655 | static void |
05394f39 | 1656 | i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj) |
673a394b | 1657 | { |
05394f39 | 1658 | int page_count = obj->base.size / PAGE_SIZE; |
9da3da66 | 1659 | struct scatterlist *sg; |
6c085a72 | 1660 | int ret, i; |
1286ff73 | 1661 | |
05394f39 | 1662 | BUG_ON(obj->madv == __I915_MADV_PURGED); |
673a394b | 1663 | |
6c085a72 CW |
1664 | ret = i915_gem_object_set_to_cpu_domain(obj, true); |
1665 | if (ret) { | |
1666 | /* In the event of a disaster, abandon all caches and | |
1667 | * hope for the best. | |
1668 | */ | |
1669 | WARN_ON(ret != -EIO); | |
1670 | i915_gem_clflush_object(obj); | |
1671 | obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
1672 | } | |
1673 | ||
6dacfd2f | 1674 | if (i915_gem_object_needs_bit17_swizzle(obj)) |
280b713b EA |
1675 | i915_gem_object_save_bit_17_swizzle(obj); |
1676 | ||
05394f39 CW |
1677 | if (obj->madv == I915_MADV_DONTNEED) |
1678 | obj->dirty = 0; | |
3ef94daa | 1679 | |
9da3da66 CW |
1680 | for_each_sg(obj->pages->sgl, sg, page_count, i) { |
1681 | struct page *page = sg_page(sg); | |
1682 | ||
05394f39 | 1683 | if (obj->dirty) |
9da3da66 | 1684 | set_page_dirty(page); |
3ef94daa | 1685 | |
05394f39 | 1686 | if (obj->madv == I915_MADV_WILLNEED) |
9da3da66 | 1687 | mark_page_accessed(page); |
3ef94daa | 1688 | |
9da3da66 | 1689 | page_cache_release(page); |
3ef94daa | 1690 | } |
05394f39 | 1691 | obj->dirty = 0; |
673a394b | 1692 | |
9da3da66 CW |
1693 | sg_free_table(obj->pages); |
1694 | kfree(obj->pages); | |
37e680a1 | 1695 | } |
6c085a72 | 1696 | |
37e680a1 CW |
1697 | static int |
1698 | i915_gem_object_put_pages(struct drm_i915_gem_object *obj) | |
1699 | { | |
1700 | const struct drm_i915_gem_object_ops *ops = obj->ops; | |
1701 | ||
2f745ad3 | 1702 | if (obj->pages == NULL) |
37e680a1 CW |
1703 | return 0; |
1704 | ||
1705 | BUG_ON(obj->gtt_space); | |
6c085a72 | 1706 | |
a5570178 CW |
1707 | if (obj->pages_pin_count) |
1708 | return -EBUSY; | |
1709 | ||
37e680a1 | 1710 | ops->put_pages(obj); |
05394f39 | 1711 | obj->pages = NULL; |
37e680a1 CW |
1712 | |
1713 | list_del(&obj->gtt_list); | |
6c085a72 CW |
1714 | if (i915_gem_object_is_purgeable(obj)) |
1715 | i915_gem_object_truncate(obj); | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | static long | |
1721 | i915_gem_purge(struct drm_i915_private *dev_priv, long target) | |
1722 | { | |
1723 | struct drm_i915_gem_object *obj, *next; | |
1724 | long count = 0; | |
1725 | ||
1726 | list_for_each_entry_safe(obj, next, | |
1727 | &dev_priv->mm.unbound_list, | |
1728 | gtt_list) { | |
1729 | if (i915_gem_object_is_purgeable(obj) && | |
37e680a1 | 1730 | i915_gem_object_put_pages(obj) == 0) { |
6c085a72 CW |
1731 | count += obj->base.size >> PAGE_SHIFT; |
1732 | if (count >= target) | |
1733 | return count; | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | list_for_each_entry_safe(obj, next, | |
1738 | &dev_priv->mm.inactive_list, | |
1739 | mm_list) { | |
1740 | if (i915_gem_object_is_purgeable(obj) && | |
1741 | i915_gem_object_unbind(obj) == 0 && | |
37e680a1 | 1742 | i915_gem_object_put_pages(obj) == 0) { |
6c085a72 CW |
1743 | count += obj->base.size >> PAGE_SHIFT; |
1744 | if (count >= target) | |
1745 | return count; | |
1746 | } | |
1747 | } | |
1748 | ||
1749 | return count; | |
1750 | } | |
1751 | ||
1752 | static void | |
1753 | i915_gem_shrink_all(struct drm_i915_private *dev_priv) | |
1754 | { | |
1755 | struct drm_i915_gem_object *obj, *next; | |
1756 | ||
1757 | i915_gem_evict_everything(dev_priv->dev); | |
1758 | ||
1759 | list_for_each_entry_safe(obj, next, &dev_priv->mm.unbound_list, gtt_list) | |
37e680a1 | 1760 | i915_gem_object_put_pages(obj); |
225067ee DV |
1761 | } |
1762 | ||
37e680a1 | 1763 | static int |
6c085a72 | 1764 | i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) |
e5281ccd | 1765 | { |
6c085a72 | 1766 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
e5281ccd CW |
1767 | int page_count, i; |
1768 | struct address_space *mapping; | |
9da3da66 CW |
1769 | struct sg_table *st; |
1770 | struct scatterlist *sg; | |
e5281ccd | 1771 | struct page *page; |
6c085a72 | 1772 | gfp_t gfp; |
e5281ccd | 1773 | |
6c085a72 CW |
1774 | /* Assert that the object is not currently in any GPU domain. As it |
1775 | * wasn't in the GTT, there shouldn't be any way it could have been in | |
1776 | * a GPU cache | |
1777 | */ | |
1778 | BUG_ON(obj->base.read_domains & I915_GEM_GPU_DOMAINS); | |
1779 | BUG_ON(obj->base.write_domain & I915_GEM_GPU_DOMAINS); | |
1780 | ||
9da3da66 CW |
1781 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
1782 | if (st == NULL) | |
1783 | return -ENOMEM; | |
1784 | ||
05394f39 | 1785 | page_count = obj->base.size / PAGE_SIZE; |
9da3da66 CW |
1786 | if (sg_alloc_table(st, page_count, GFP_KERNEL)) { |
1787 | sg_free_table(st); | |
1788 | kfree(st); | |
e5281ccd | 1789 | return -ENOMEM; |
9da3da66 | 1790 | } |
e5281ccd | 1791 | |
9da3da66 CW |
1792 | /* Get the list of pages out of our struct file. They'll be pinned |
1793 | * at this point until we release them. | |
1794 | * | |
1795 | * Fail silently without starting the shrinker | |
1796 | */ | |
6c085a72 CW |
1797 | mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; |
1798 | gfp = mapping_gfp_mask(mapping); | |
d7c3b937 | 1799 | gfp |= __GFP_NORETRY | __GFP_NOWARN; |
6c085a72 | 1800 | gfp &= ~(__GFP_IO | __GFP_WAIT); |
9da3da66 | 1801 | for_each_sg(st->sgl, sg, page_count, i) { |
6c085a72 CW |
1802 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); |
1803 | if (IS_ERR(page)) { | |
1804 | i915_gem_purge(dev_priv, page_count); | |
1805 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); | |
1806 | } | |
1807 | if (IS_ERR(page)) { | |
1808 | /* We've tried hard to allocate the memory by reaping | |
1809 | * our own buffer, now let the real VM do its job and | |
1810 | * go down in flames if truly OOM. | |
1811 | */ | |
d7c3b937 | 1812 | gfp &= ~(__GFP_NORETRY | __GFP_NOWARN); |
6c085a72 CW |
1813 | gfp |= __GFP_IO | __GFP_WAIT; |
1814 | ||
1815 | i915_gem_shrink_all(dev_priv); | |
1816 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); | |
1817 | if (IS_ERR(page)) | |
1818 | goto err_pages; | |
1819 | ||
d7c3b937 | 1820 | gfp |= __GFP_NORETRY | __GFP_NOWARN; |
6c085a72 CW |
1821 | gfp &= ~(__GFP_IO | __GFP_WAIT); |
1822 | } | |
e5281ccd | 1823 | |
9da3da66 | 1824 | sg_set_page(sg, page, PAGE_SIZE, 0); |
e5281ccd CW |
1825 | } |
1826 | ||
74ce6b6c CW |
1827 | obj->pages = st; |
1828 | ||
6dacfd2f | 1829 | if (i915_gem_object_needs_bit17_swizzle(obj)) |
e5281ccd CW |
1830 | i915_gem_object_do_bit_17_swizzle(obj); |
1831 | ||
1832 | return 0; | |
1833 | ||
1834 | err_pages: | |
9da3da66 CW |
1835 | for_each_sg(st->sgl, sg, i, page_count) |
1836 | page_cache_release(sg_page(sg)); | |
1837 | sg_free_table(st); | |
1838 | kfree(st); | |
e5281ccd | 1839 | return PTR_ERR(page); |
673a394b EA |
1840 | } |
1841 | ||
37e680a1 CW |
1842 | /* Ensure that the associated pages are gathered from the backing storage |
1843 | * and pinned into our object. i915_gem_object_get_pages() may be called | |
1844 | * multiple times before they are released by a single call to | |
1845 | * i915_gem_object_put_pages() - once the pages are no longer referenced | |
1846 | * either as a result of memory pressure (reaping pages under the shrinker) | |
1847 | * or as the object is itself released. | |
1848 | */ | |
1849 | int | |
1850 | i915_gem_object_get_pages(struct drm_i915_gem_object *obj) | |
1851 | { | |
1852 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
1853 | const struct drm_i915_gem_object_ops *ops = obj->ops; | |
1854 | int ret; | |
1855 | ||
2f745ad3 | 1856 | if (obj->pages) |
37e680a1 CW |
1857 | return 0; |
1858 | ||
a5570178 CW |
1859 | BUG_ON(obj->pages_pin_count); |
1860 | ||
37e680a1 CW |
1861 | ret = ops->get_pages(obj); |
1862 | if (ret) | |
1863 | return ret; | |
1864 | ||
1865 | list_add_tail(&obj->gtt_list, &dev_priv->mm.unbound_list); | |
1866 | return 0; | |
673a394b EA |
1867 | } |
1868 | ||
54cf91dc | 1869 | void |
05394f39 | 1870 | i915_gem_object_move_to_active(struct drm_i915_gem_object *obj, |
1ec14ad3 CW |
1871 | struct intel_ring_buffer *ring, |
1872 | u32 seqno) | |
673a394b | 1873 | { |
05394f39 | 1874 | struct drm_device *dev = obj->base.dev; |
69dc4987 | 1875 | struct drm_i915_private *dev_priv = dev->dev_private; |
617dbe27 | 1876 | |
852835f3 | 1877 | BUG_ON(ring == NULL); |
05394f39 | 1878 | obj->ring = ring; |
673a394b EA |
1879 | |
1880 | /* Add a reference if we're newly entering the active list. */ | |
05394f39 CW |
1881 | if (!obj->active) { |
1882 | drm_gem_object_reference(&obj->base); | |
1883 | obj->active = 1; | |
673a394b | 1884 | } |
e35a41de | 1885 | |
673a394b | 1886 | /* Move from whatever list we were on to the tail of execution. */ |
05394f39 CW |
1887 | list_move_tail(&obj->mm_list, &dev_priv->mm.active_list); |
1888 | list_move_tail(&obj->ring_list, &ring->active_list); | |
caea7476 | 1889 | |
0201f1ec | 1890 | obj->last_read_seqno = seqno; |
caea7476 | 1891 | |
7dd49065 | 1892 | if (obj->fenced_gpu_access) { |
caea7476 | 1893 | obj->last_fenced_seqno = seqno; |
caea7476 | 1894 | |
7dd49065 CW |
1895 | /* Bump MRU to take account of the delayed flush */ |
1896 | if (obj->fence_reg != I915_FENCE_REG_NONE) { | |
1897 | struct drm_i915_fence_reg *reg; | |
1898 | ||
1899 | reg = &dev_priv->fence_regs[obj->fence_reg]; | |
1900 | list_move_tail(®->lru_list, | |
1901 | &dev_priv->mm.fence_list); | |
1902 | } | |
caea7476 CW |
1903 | } |
1904 | } | |
1905 | ||
1906 | static void | |
caea7476 | 1907 | i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj) |
ce44b0ea | 1908 | { |
05394f39 | 1909 | struct drm_device *dev = obj->base.dev; |
caea7476 | 1910 | struct drm_i915_private *dev_priv = dev->dev_private; |
ce44b0ea | 1911 | |
65ce3027 | 1912 | BUG_ON(obj->base.write_domain & ~I915_GEM_GPU_DOMAINS); |
05394f39 | 1913 | BUG_ON(!obj->active); |
caea7476 | 1914 | |
f047e395 CW |
1915 | if (obj->pin_count) /* are we a framebuffer? */ |
1916 | intel_mark_fb_idle(obj); | |
caea7476 | 1917 | |
1b50247a | 1918 | list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list); |
caea7476 | 1919 | |
65ce3027 | 1920 | list_del_init(&obj->ring_list); |
caea7476 CW |
1921 | obj->ring = NULL; |
1922 | ||
65ce3027 CW |
1923 | obj->last_read_seqno = 0; |
1924 | obj->last_write_seqno = 0; | |
1925 | obj->base.write_domain = 0; | |
1926 | ||
1927 | obj->last_fenced_seqno = 0; | |
caea7476 | 1928 | obj->fenced_gpu_access = false; |
caea7476 CW |
1929 | |
1930 | obj->active = 0; | |
1931 | drm_gem_object_unreference(&obj->base); | |
1932 | ||
1933 | WARN_ON(i915_verify_lists(dev)); | |
ce44b0ea | 1934 | } |
673a394b | 1935 | |
53d227f2 DV |
1936 | static u32 |
1937 | i915_gem_get_seqno(struct drm_device *dev) | |
1938 | { | |
1939 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1940 | u32 seqno = dev_priv->next_seqno; | |
1941 | ||
1942 | /* reserve 0 for non-seqno */ | |
1943 | if (++dev_priv->next_seqno == 0) | |
1944 | dev_priv->next_seqno = 1; | |
1945 | ||
1946 | return seqno; | |
1947 | } | |
1948 | ||
1949 | u32 | |
1950 | i915_gem_next_request_seqno(struct intel_ring_buffer *ring) | |
1951 | { | |
1952 | if (ring->outstanding_lazy_request == 0) | |
1953 | ring->outstanding_lazy_request = i915_gem_get_seqno(ring->dev); | |
1954 | ||
1955 | return ring->outstanding_lazy_request; | |
1956 | } | |
1957 | ||
3cce469c | 1958 | int |
db53a302 | 1959 | i915_add_request(struct intel_ring_buffer *ring, |
f787a5f5 | 1960 | struct drm_file *file, |
acb868d3 | 1961 | u32 *out_seqno) |
673a394b | 1962 | { |
db53a302 | 1963 | drm_i915_private_t *dev_priv = ring->dev->dev_private; |
acb868d3 | 1964 | struct drm_i915_gem_request *request; |
a71d8d94 | 1965 | u32 request_ring_position; |
acb868d3 | 1966 | u32 seqno; |
673a394b | 1967 | int was_empty; |
3cce469c CW |
1968 | int ret; |
1969 | ||
cc889e0f DV |
1970 | /* |
1971 | * Emit any outstanding flushes - execbuf can fail to emit the flush | |
1972 | * after having emitted the batchbuffer command. Hence we need to fix | |
1973 | * things up similar to emitting the lazy request. The difference here | |
1974 | * is that the flush _must_ happen before the next request, no matter | |
1975 | * what. | |
1976 | */ | |
a7b9761d CW |
1977 | ret = intel_ring_flush_all_caches(ring); |
1978 | if (ret) | |
1979 | return ret; | |
cc889e0f | 1980 | |
acb868d3 CW |
1981 | request = kmalloc(sizeof(*request), GFP_KERNEL); |
1982 | if (request == NULL) | |
1983 | return -ENOMEM; | |
cc889e0f | 1984 | |
53d227f2 | 1985 | seqno = i915_gem_next_request_seqno(ring); |
673a394b | 1986 | |
a71d8d94 CW |
1987 | /* Record the position of the start of the request so that |
1988 | * should we detect the updated seqno part-way through the | |
1989 | * GPU processing the request, we never over-estimate the | |
1990 | * position of the head. | |
1991 | */ | |
1992 | request_ring_position = intel_ring_get_tail(ring); | |
1993 | ||
3cce469c | 1994 | ret = ring->add_request(ring, &seqno); |
3bb73aba CW |
1995 | if (ret) { |
1996 | kfree(request); | |
1997 | return ret; | |
1998 | } | |
673a394b | 1999 | |
db53a302 | 2000 | trace_i915_gem_request_add(ring, seqno); |
673a394b EA |
2001 | |
2002 | request->seqno = seqno; | |
852835f3 | 2003 | request->ring = ring; |
a71d8d94 | 2004 | request->tail = request_ring_position; |
673a394b | 2005 | request->emitted_jiffies = jiffies; |
852835f3 ZN |
2006 | was_empty = list_empty(&ring->request_list); |
2007 | list_add_tail(&request->list, &ring->request_list); | |
3bb73aba | 2008 | request->file_priv = NULL; |
852835f3 | 2009 | |
db53a302 CW |
2010 | if (file) { |
2011 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
2012 | ||
1c25595f | 2013 | spin_lock(&file_priv->mm.lock); |
f787a5f5 | 2014 | request->file_priv = file_priv; |
b962442e | 2015 | list_add_tail(&request->client_list, |
f787a5f5 | 2016 | &file_priv->mm.request_list); |
1c25595f | 2017 | spin_unlock(&file_priv->mm.lock); |
b962442e | 2018 | } |
673a394b | 2019 | |
5391d0cf | 2020 | ring->outstanding_lazy_request = 0; |
db53a302 | 2021 | |
f65d9421 | 2022 | if (!dev_priv->mm.suspended) { |
3e0dc6b0 BW |
2023 | if (i915_enable_hangcheck) { |
2024 | mod_timer(&dev_priv->hangcheck_timer, | |
cecc21fe | 2025 | round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES)); |
3e0dc6b0 | 2026 | } |
f047e395 | 2027 | if (was_empty) { |
b3b079db | 2028 | queue_delayed_work(dev_priv->wq, |
bcb45086 CW |
2029 | &dev_priv->mm.retire_work, |
2030 | round_jiffies_up_relative(HZ)); | |
f047e395 CW |
2031 | intel_mark_busy(dev_priv->dev); |
2032 | } | |
f65d9421 | 2033 | } |
cc889e0f | 2034 | |
acb868d3 CW |
2035 | if (out_seqno) |
2036 | *out_seqno = seqno; | |
3cce469c | 2037 | return 0; |
673a394b EA |
2038 | } |
2039 | ||
f787a5f5 CW |
2040 | static inline void |
2041 | i915_gem_request_remove_from_client(struct drm_i915_gem_request *request) | |
673a394b | 2042 | { |
1c25595f | 2043 | struct drm_i915_file_private *file_priv = request->file_priv; |
673a394b | 2044 | |
1c25595f CW |
2045 | if (!file_priv) |
2046 | return; | |
1c5d22f7 | 2047 | |
1c25595f | 2048 | spin_lock(&file_priv->mm.lock); |
09bfa517 HRK |
2049 | if (request->file_priv) { |
2050 | list_del(&request->client_list); | |
2051 | request->file_priv = NULL; | |
2052 | } | |
1c25595f | 2053 | spin_unlock(&file_priv->mm.lock); |
673a394b | 2054 | } |
673a394b | 2055 | |
dfaae392 CW |
2056 | static void i915_gem_reset_ring_lists(struct drm_i915_private *dev_priv, |
2057 | struct intel_ring_buffer *ring) | |
9375e446 | 2058 | { |
dfaae392 CW |
2059 | while (!list_empty(&ring->request_list)) { |
2060 | struct drm_i915_gem_request *request; | |
673a394b | 2061 | |
dfaae392 CW |
2062 | request = list_first_entry(&ring->request_list, |
2063 | struct drm_i915_gem_request, | |
2064 | list); | |
de151cf6 | 2065 | |
dfaae392 | 2066 | list_del(&request->list); |
f787a5f5 | 2067 | i915_gem_request_remove_from_client(request); |
dfaae392 CW |
2068 | kfree(request); |
2069 | } | |
673a394b | 2070 | |
dfaae392 | 2071 | while (!list_empty(&ring->active_list)) { |
05394f39 | 2072 | struct drm_i915_gem_object *obj; |
9375e446 | 2073 | |
05394f39 CW |
2074 | obj = list_first_entry(&ring->active_list, |
2075 | struct drm_i915_gem_object, | |
2076 | ring_list); | |
9375e446 | 2077 | |
05394f39 | 2078 | i915_gem_object_move_to_inactive(obj); |
673a394b EA |
2079 | } |
2080 | } | |
2081 | ||
312817a3 CW |
2082 | static void i915_gem_reset_fences(struct drm_device *dev) |
2083 | { | |
2084 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2085 | int i; | |
2086 | ||
4b9de737 | 2087 | for (i = 0; i < dev_priv->num_fence_regs; i++) { |
312817a3 | 2088 | struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i]; |
7d2cb39c | 2089 | |
ada726c7 | 2090 | i915_gem_write_fence(dev, i, NULL); |
7d2cb39c | 2091 | |
ada726c7 CW |
2092 | if (reg->obj) |
2093 | i915_gem_object_fence_lost(reg->obj); | |
7d2cb39c | 2094 | |
ada726c7 CW |
2095 | reg->pin_count = 0; |
2096 | reg->obj = NULL; | |
2097 | INIT_LIST_HEAD(®->lru_list); | |
312817a3 | 2098 | } |
ada726c7 CW |
2099 | |
2100 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); | |
312817a3 CW |
2101 | } |
2102 | ||
069efc1d | 2103 | void i915_gem_reset(struct drm_device *dev) |
673a394b | 2104 | { |
77f01230 | 2105 | struct drm_i915_private *dev_priv = dev->dev_private; |
05394f39 | 2106 | struct drm_i915_gem_object *obj; |
b4519513 | 2107 | struct intel_ring_buffer *ring; |
1ec14ad3 | 2108 | int i; |
673a394b | 2109 | |
b4519513 CW |
2110 | for_each_ring(ring, dev_priv, i) |
2111 | i915_gem_reset_ring_lists(dev_priv, ring); | |
dfaae392 | 2112 | |
dfaae392 CW |
2113 | /* Move everything out of the GPU domains to ensure we do any |
2114 | * necessary invalidation upon reuse. | |
2115 | */ | |
05394f39 | 2116 | list_for_each_entry(obj, |
77f01230 | 2117 | &dev_priv->mm.inactive_list, |
69dc4987 | 2118 | mm_list) |
77f01230 | 2119 | { |
05394f39 | 2120 | obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS; |
77f01230 | 2121 | } |
069efc1d CW |
2122 | |
2123 | /* The fence registers are invalidated so clear them out */ | |
312817a3 | 2124 | i915_gem_reset_fences(dev); |
673a394b EA |
2125 | } |
2126 | ||
2127 | /** | |
2128 | * This function clears the request list as sequence numbers are passed. | |
2129 | */ | |
a71d8d94 | 2130 | void |
db53a302 | 2131 | i915_gem_retire_requests_ring(struct intel_ring_buffer *ring) |
673a394b | 2132 | { |
673a394b | 2133 | uint32_t seqno; |
1ec14ad3 | 2134 | int i; |
673a394b | 2135 | |
db53a302 | 2136 | if (list_empty(&ring->request_list)) |
6c0594a3 KW |
2137 | return; |
2138 | ||
db53a302 | 2139 | WARN_ON(i915_verify_lists(ring->dev)); |
673a394b | 2140 | |
b2eadbc8 | 2141 | seqno = ring->get_seqno(ring, true); |
1ec14ad3 | 2142 | |
076e2c0e | 2143 | for (i = 0; i < ARRAY_SIZE(ring->sync_seqno); i++) |
1ec14ad3 CW |
2144 | if (seqno >= ring->sync_seqno[i]) |
2145 | ring->sync_seqno[i] = 0; | |
2146 | ||
852835f3 | 2147 | while (!list_empty(&ring->request_list)) { |
673a394b | 2148 | struct drm_i915_gem_request *request; |
673a394b | 2149 | |
852835f3 | 2150 | request = list_first_entry(&ring->request_list, |
673a394b EA |
2151 | struct drm_i915_gem_request, |
2152 | list); | |
673a394b | 2153 | |
dfaae392 | 2154 | if (!i915_seqno_passed(seqno, request->seqno)) |
b84d5f0c CW |
2155 | break; |
2156 | ||
db53a302 | 2157 | trace_i915_gem_request_retire(ring, request->seqno); |
a71d8d94 CW |
2158 | /* We know the GPU must have read the request to have |
2159 | * sent us the seqno + interrupt, so use the position | |
2160 | * of tail of the request to update the last known position | |
2161 | * of the GPU head. | |
2162 | */ | |
2163 | ring->last_retired_head = request->tail; | |
b84d5f0c CW |
2164 | |
2165 | list_del(&request->list); | |
f787a5f5 | 2166 | i915_gem_request_remove_from_client(request); |
b84d5f0c CW |
2167 | kfree(request); |
2168 | } | |
673a394b | 2169 | |
b84d5f0c CW |
2170 | /* Move any buffers on the active list that are no longer referenced |
2171 | * by the ringbuffer to the flushing/inactive lists as appropriate. | |
2172 | */ | |
2173 | while (!list_empty(&ring->active_list)) { | |
05394f39 | 2174 | struct drm_i915_gem_object *obj; |
b84d5f0c | 2175 | |
0206e353 | 2176 | obj = list_first_entry(&ring->active_list, |
05394f39 CW |
2177 | struct drm_i915_gem_object, |
2178 | ring_list); | |
673a394b | 2179 | |
0201f1ec | 2180 | if (!i915_seqno_passed(seqno, obj->last_read_seqno)) |
673a394b | 2181 | break; |
b84d5f0c | 2182 | |
65ce3027 | 2183 | i915_gem_object_move_to_inactive(obj); |
673a394b | 2184 | } |
9d34e5db | 2185 | |
db53a302 CW |
2186 | if (unlikely(ring->trace_irq_seqno && |
2187 | i915_seqno_passed(seqno, ring->trace_irq_seqno))) { | |
1ec14ad3 | 2188 | ring->irq_put(ring); |
db53a302 | 2189 | ring->trace_irq_seqno = 0; |
9d34e5db | 2190 | } |
23bc5982 | 2191 | |
db53a302 | 2192 | WARN_ON(i915_verify_lists(ring->dev)); |
673a394b EA |
2193 | } |
2194 | ||
b09a1fec CW |
2195 | void |
2196 | i915_gem_retire_requests(struct drm_device *dev) | |
2197 | { | |
2198 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b4519513 | 2199 | struct intel_ring_buffer *ring; |
1ec14ad3 | 2200 | int i; |
b09a1fec | 2201 | |
b4519513 CW |
2202 | for_each_ring(ring, dev_priv, i) |
2203 | i915_gem_retire_requests_ring(ring); | |
b09a1fec CW |
2204 | } |
2205 | ||
75ef9da2 | 2206 | static void |
673a394b EA |
2207 | i915_gem_retire_work_handler(struct work_struct *work) |
2208 | { | |
2209 | drm_i915_private_t *dev_priv; | |
2210 | struct drm_device *dev; | |
b4519513 | 2211 | struct intel_ring_buffer *ring; |
0a58705b CW |
2212 | bool idle; |
2213 | int i; | |
673a394b EA |
2214 | |
2215 | dev_priv = container_of(work, drm_i915_private_t, | |
2216 | mm.retire_work.work); | |
2217 | dev = dev_priv->dev; | |
2218 | ||
891b48cf CW |
2219 | /* Come back later if the device is busy... */ |
2220 | if (!mutex_trylock(&dev->struct_mutex)) { | |
bcb45086 CW |
2221 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, |
2222 | round_jiffies_up_relative(HZ)); | |
891b48cf CW |
2223 | return; |
2224 | } | |
673a394b | 2225 | |
b09a1fec | 2226 | i915_gem_retire_requests(dev); |
673a394b | 2227 | |
0a58705b CW |
2228 | /* Send a periodic flush down the ring so we don't hold onto GEM |
2229 | * objects indefinitely. | |
673a394b | 2230 | */ |
0a58705b | 2231 | idle = true; |
b4519513 | 2232 | for_each_ring(ring, dev_priv, i) { |
3bb73aba CW |
2233 | if (ring->gpu_caches_dirty) |
2234 | i915_add_request(ring, NULL, NULL); | |
0a58705b CW |
2235 | |
2236 | idle &= list_empty(&ring->request_list); | |
673a394b EA |
2237 | } |
2238 | ||
0a58705b | 2239 | if (!dev_priv->mm.suspended && !idle) |
bcb45086 CW |
2240 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, |
2241 | round_jiffies_up_relative(HZ)); | |
f047e395 CW |
2242 | if (idle) |
2243 | intel_mark_idle(dev); | |
0a58705b | 2244 | |
673a394b | 2245 | mutex_unlock(&dev->struct_mutex); |
673a394b EA |
2246 | } |
2247 | ||
30dfebf3 DV |
2248 | /** |
2249 | * Ensures that an object will eventually get non-busy by flushing any required | |
2250 | * write domains, emitting any outstanding lazy request and retiring and | |
2251 | * completed requests. | |
2252 | */ | |
2253 | static int | |
2254 | i915_gem_object_flush_active(struct drm_i915_gem_object *obj) | |
2255 | { | |
2256 | int ret; | |
2257 | ||
2258 | if (obj->active) { | |
0201f1ec | 2259 | ret = i915_gem_check_olr(obj->ring, obj->last_read_seqno); |
30dfebf3 DV |
2260 | if (ret) |
2261 | return ret; | |
2262 | ||
30dfebf3 DV |
2263 | i915_gem_retire_requests_ring(obj->ring); |
2264 | } | |
2265 | ||
2266 | return 0; | |
2267 | } | |
2268 | ||
23ba4fd0 BW |
2269 | /** |
2270 | * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT | |
2271 | * @DRM_IOCTL_ARGS: standard ioctl arguments | |
2272 | * | |
2273 | * Returns 0 if successful, else an error is returned with the remaining time in | |
2274 | * the timeout parameter. | |
2275 | * -ETIME: object is still busy after timeout | |
2276 | * -ERESTARTSYS: signal interrupted the wait | |
2277 | * -ENONENT: object doesn't exist | |
2278 | * Also possible, but rare: | |
2279 | * -EAGAIN: GPU wedged | |
2280 | * -ENOMEM: damn | |
2281 | * -ENODEV: Internal IRQ fail | |
2282 | * -E?: The add request failed | |
2283 | * | |
2284 | * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any | |
2285 | * non-zero timeout parameter the wait ioctl will wait for the given number of | |
2286 | * nanoseconds on an object becoming unbusy. Since the wait itself does so | |
2287 | * without holding struct_mutex the object may become re-busied before this | |
2288 | * function completes. A similar but shorter * race condition exists in the busy | |
2289 | * ioctl | |
2290 | */ | |
2291 | int | |
2292 | i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) | |
2293 | { | |
2294 | struct drm_i915_gem_wait *args = data; | |
2295 | struct drm_i915_gem_object *obj; | |
2296 | struct intel_ring_buffer *ring = NULL; | |
eac1f14f | 2297 | struct timespec timeout_stack, *timeout = NULL; |
23ba4fd0 BW |
2298 | u32 seqno = 0; |
2299 | int ret = 0; | |
2300 | ||
eac1f14f BW |
2301 | if (args->timeout_ns >= 0) { |
2302 | timeout_stack = ns_to_timespec(args->timeout_ns); | |
2303 | timeout = &timeout_stack; | |
2304 | } | |
23ba4fd0 BW |
2305 | |
2306 | ret = i915_mutex_lock_interruptible(dev); | |
2307 | if (ret) | |
2308 | return ret; | |
2309 | ||
2310 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->bo_handle)); | |
2311 | if (&obj->base == NULL) { | |
2312 | mutex_unlock(&dev->struct_mutex); | |
2313 | return -ENOENT; | |
2314 | } | |
2315 | ||
30dfebf3 DV |
2316 | /* Need to make sure the object gets inactive eventually. */ |
2317 | ret = i915_gem_object_flush_active(obj); | |
23ba4fd0 BW |
2318 | if (ret) |
2319 | goto out; | |
2320 | ||
2321 | if (obj->active) { | |
0201f1ec | 2322 | seqno = obj->last_read_seqno; |
23ba4fd0 BW |
2323 | ring = obj->ring; |
2324 | } | |
2325 | ||
2326 | if (seqno == 0) | |
2327 | goto out; | |
2328 | ||
23ba4fd0 BW |
2329 | /* Do this after OLR check to make sure we make forward progress polling |
2330 | * on this IOCTL with a 0 timeout (like busy ioctl) | |
2331 | */ | |
2332 | if (!args->timeout_ns) { | |
2333 | ret = -ETIME; | |
2334 | goto out; | |
2335 | } | |
2336 | ||
2337 | drm_gem_object_unreference(&obj->base); | |
2338 | mutex_unlock(&dev->struct_mutex); | |
2339 | ||
eac1f14f BW |
2340 | ret = __wait_seqno(ring, seqno, true, timeout); |
2341 | if (timeout) { | |
2342 | WARN_ON(!timespec_valid(timeout)); | |
2343 | args->timeout_ns = timespec_to_ns(timeout); | |
2344 | } | |
23ba4fd0 BW |
2345 | return ret; |
2346 | ||
2347 | out: | |
2348 | drm_gem_object_unreference(&obj->base); | |
2349 | mutex_unlock(&dev->struct_mutex); | |
2350 | return ret; | |
2351 | } | |
2352 | ||
5816d648 BW |
2353 | /** |
2354 | * i915_gem_object_sync - sync an object to a ring. | |
2355 | * | |
2356 | * @obj: object which may be in use on another ring. | |
2357 | * @to: ring we wish to use the object on. May be NULL. | |
2358 | * | |
2359 | * This code is meant to abstract object synchronization with the GPU. | |
2360 | * Calling with NULL implies synchronizing the object with the CPU | |
2361 | * rather than a particular GPU ring. | |
2362 | * | |
2363 | * Returns 0 if successful, else propagates up the lower layer error. | |
2364 | */ | |
2911a35b BW |
2365 | int |
2366 | i915_gem_object_sync(struct drm_i915_gem_object *obj, | |
2367 | struct intel_ring_buffer *to) | |
2368 | { | |
2369 | struct intel_ring_buffer *from = obj->ring; | |
2370 | u32 seqno; | |
2371 | int ret, idx; | |
2372 | ||
2373 | if (from == NULL || to == from) | |
2374 | return 0; | |
2375 | ||
5816d648 | 2376 | if (to == NULL || !i915_semaphore_is_enabled(obj->base.dev)) |
0201f1ec | 2377 | return i915_gem_object_wait_rendering(obj, false); |
2911a35b BW |
2378 | |
2379 | idx = intel_ring_sync_index(from, to); | |
2380 | ||
0201f1ec | 2381 | seqno = obj->last_read_seqno; |
2911a35b BW |
2382 | if (seqno <= from->sync_seqno[idx]) |
2383 | return 0; | |
2384 | ||
b4aca010 BW |
2385 | ret = i915_gem_check_olr(obj->ring, seqno); |
2386 | if (ret) | |
2387 | return ret; | |
2911a35b | 2388 | |
1500f7ea | 2389 | ret = to->sync_to(to, from, seqno); |
e3a5a225 BW |
2390 | if (!ret) |
2391 | from->sync_seqno[idx] = seqno; | |
2911a35b | 2392 | |
e3a5a225 | 2393 | return ret; |
2911a35b BW |
2394 | } |
2395 | ||
b5ffc9bc CW |
2396 | static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj) |
2397 | { | |
2398 | u32 old_write_domain, old_read_domains; | |
2399 | ||
b5ffc9bc CW |
2400 | /* Act a barrier for all accesses through the GTT */ |
2401 | mb(); | |
2402 | ||
2403 | /* Force a pagefault for domain tracking on next user access */ | |
2404 | i915_gem_release_mmap(obj); | |
2405 | ||
b97c3d9c KP |
2406 | if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) |
2407 | return; | |
2408 | ||
b5ffc9bc CW |
2409 | old_read_domains = obj->base.read_domains; |
2410 | old_write_domain = obj->base.write_domain; | |
2411 | ||
2412 | obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT; | |
2413 | obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT; | |
2414 | ||
2415 | trace_i915_gem_object_change_domain(obj, | |
2416 | old_read_domains, | |
2417 | old_write_domain); | |
2418 | } | |
2419 | ||
673a394b EA |
2420 | /** |
2421 | * Unbinds an object from the GTT aperture. | |
2422 | */ | |
0f973f27 | 2423 | int |
05394f39 | 2424 | i915_gem_object_unbind(struct drm_i915_gem_object *obj) |
673a394b | 2425 | { |
7bddb01f | 2426 | drm_i915_private_t *dev_priv = obj->base.dev->dev_private; |
673a394b EA |
2427 | int ret = 0; |
2428 | ||
05394f39 | 2429 | if (obj->gtt_space == NULL) |
673a394b EA |
2430 | return 0; |
2431 | ||
31d8d651 CW |
2432 | if (obj->pin_count) |
2433 | return -EBUSY; | |
673a394b | 2434 | |
c4670ad0 CW |
2435 | BUG_ON(obj->pages == NULL); |
2436 | ||
a8198eea | 2437 | ret = i915_gem_object_finish_gpu(obj); |
1488fc08 | 2438 | if (ret) |
a8198eea CW |
2439 | return ret; |
2440 | /* Continue on if we fail due to EIO, the GPU is hung so we | |
2441 | * should be safe and we need to cleanup or else we might | |
2442 | * cause memory corruption through use-after-free. | |
2443 | */ | |
2444 | ||
b5ffc9bc | 2445 | i915_gem_object_finish_gtt(obj); |
5323fd04 | 2446 | |
96b47b65 | 2447 | /* release the fence reg _after_ flushing */ |
d9e86c0e | 2448 | ret = i915_gem_object_put_fence(obj); |
1488fc08 | 2449 | if (ret) |
d9e86c0e | 2450 | return ret; |
96b47b65 | 2451 | |
db53a302 CW |
2452 | trace_i915_gem_object_unbind(obj); |
2453 | ||
74898d7e DV |
2454 | if (obj->has_global_gtt_mapping) |
2455 | i915_gem_gtt_unbind_object(obj); | |
7bddb01f DV |
2456 | if (obj->has_aliasing_ppgtt_mapping) { |
2457 | i915_ppgtt_unbind_object(dev_priv->mm.aliasing_ppgtt, obj); | |
2458 | obj->has_aliasing_ppgtt_mapping = 0; | |
2459 | } | |
74163907 | 2460 | i915_gem_gtt_finish_object(obj); |
7bddb01f | 2461 | |
6c085a72 CW |
2462 | list_del(&obj->mm_list); |
2463 | list_move_tail(&obj->gtt_list, &dev_priv->mm.unbound_list); | |
75e9e915 | 2464 | /* Avoid an unnecessary call to unbind on rebind. */ |
05394f39 | 2465 | obj->map_and_fenceable = true; |
673a394b | 2466 | |
05394f39 CW |
2467 | drm_mm_put_block(obj->gtt_space); |
2468 | obj->gtt_space = NULL; | |
2469 | obj->gtt_offset = 0; | |
673a394b | 2470 | |
88241785 | 2471 | return 0; |
54cf91dc CW |
2472 | } |
2473 | ||
b2da9fe5 | 2474 | static int i915_ring_idle(struct intel_ring_buffer *ring) |
a56ba56c | 2475 | { |
69c2fc89 | 2476 | if (list_empty(&ring->active_list)) |
64193406 CW |
2477 | return 0; |
2478 | ||
199b2bc2 | 2479 | return i915_wait_seqno(ring, i915_gem_next_request_seqno(ring)); |
a56ba56c CW |
2480 | } |
2481 | ||
b2da9fe5 | 2482 | int i915_gpu_idle(struct drm_device *dev) |
4df2faf4 DV |
2483 | { |
2484 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b4519513 | 2485 | struct intel_ring_buffer *ring; |
1ec14ad3 | 2486 | int ret, i; |
4df2faf4 | 2487 | |
4df2faf4 | 2488 | /* Flush everything onto the inactive list. */ |
b4519513 | 2489 | for_each_ring(ring, dev_priv, i) { |
b6c7488d BW |
2490 | ret = i915_switch_context(ring, NULL, DEFAULT_CONTEXT_ID); |
2491 | if (ret) | |
2492 | return ret; | |
2493 | ||
b4519513 | 2494 | ret = i915_ring_idle(ring); |
1ec14ad3 CW |
2495 | if (ret) |
2496 | return ret; | |
2497 | } | |
4df2faf4 | 2498 | |
8a1a49f9 | 2499 | return 0; |
4df2faf4 DV |
2500 | } |
2501 | ||
9ce079e4 CW |
2502 | static void sandybridge_write_fence_reg(struct drm_device *dev, int reg, |
2503 | struct drm_i915_gem_object *obj) | |
4e901fdc | 2504 | { |
4e901fdc | 2505 | drm_i915_private_t *dev_priv = dev->dev_private; |
4e901fdc EA |
2506 | uint64_t val; |
2507 | ||
9ce079e4 CW |
2508 | if (obj) { |
2509 | u32 size = obj->gtt_space->size; | |
4e901fdc | 2510 | |
9ce079e4 CW |
2511 | val = (uint64_t)((obj->gtt_offset + size - 4096) & |
2512 | 0xfffff000) << 32; | |
2513 | val |= obj->gtt_offset & 0xfffff000; | |
2514 | val |= (uint64_t)((obj->stride / 128) - 1) << | |
2515 | SANDYBRIDGE_FENCE_PITCH_SHIFT; | |
4e901fdc | 2516 | |
9ce079e4 CW |
2517 | if (obj->tiling_mode == I915_TILING_Y) |
2518 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; | |
2519 | val |= I965_FENCE_REG_VALID; | |
2520 | } else | |
2521 | val = 0; | |
c6642782 | 2522 | |
9ce079e4 CW |
2523 | I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + reg * 8, val); |
2524 | POSTING_READ(FENCE_REG_SANDYBRIDGE_0 + reg * 8); | |
4e901fdc EA |
2525 | } |
2526 | ||
9ce079e4 CW |
2527 | static void i965_write_fence_reg(struct drm_device *dev, int reg, |
2528 | struct drm_i915_gem_object *obj) | |
de151cf6 | 2529 | { |
de151cf6 | 2530 | drm_i915_private_t *dev_priv = dev->dev_private; |
de151cf6 JB |
2531 | uint64_t val; |
2532 | ||
9ce079e4 CW |
2533 | if (obj) { |
2534 | u32 size = obj->gtt_space->size; | |
de151cf6 | 2535 | |
9ce079e4 CW |
2536 | val = (uint64_t)((obj->gtt_offset + size - 4096) & |
2537 | 0xfffff000) << 32; | |
2538 | val |= obj->gtt_offset & 0xfffff000; | |
2539 | val |= ((obj->stride / 128) - 1) << I965_FENCE_PITCH_SHIFT; | |
2540 | if (obj->tiling_mode == I915_TILING_Y) | |
2541 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; | |
2542 | val |= I965_FENCE_REG_VALID; | |
2543 | } else | |
2544 | val = 0; | |
c6642782 | 2545 | |
9ce079e4 CW |
2546 | I915_WRITE64(FENCE_REG_965_0 + reg * 8, val); |
2547 | POSTING_READ(FENCE_REG_965_0 + reg * 8); | |
de151cf6 JB |
2548 | } |
2549 | ||
9ce079e4 CW |
2550 | static void i915_write_fence_reg(struct drm_device *dev, int reg, |
2551 | struct drm_i915_gem_object *obj) | |
de151cf6 | 2552 | { |
de151cf6 | 2553 | drm_i915_private_t *dev_priv = dev->dev_private; |
9ce079e4 | 2554 | u32 val; |
de151cf6 | 2555 | |
9ce079e4 CW |
2556 | if (obj) { |
2557 | u32 size = obj->gtt_space->size; | |
2558 | int pitch_val; | |
2559 | int tile_width; | |
c6642782 | 2560 | |
9ce079e4 CW |
2561 | WARN((obj->gtt_offset & ~I915_FENCE_START_MASK) || |
2562 | (size & -size) != size || | |
2563 | (obj->gtt_offset & (size - 1)), | |
2564 | "object 0x%08x [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n", | |
2565 | obj->gtt_offset, obj->map_and_fenceable, size); | |
c6642782 | 2566 | |
9ce079e4 CW |
2567 | if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev)) |
2568 | tile_width = 128; | |
2569 | else | |
2570 | tile_width = 512; | |
2571 | ||
2572 | /* Note: pitch better be a power of two tile widths */ | |
2573 | pitch_val = obj->stride / tile_width; | |
2574 | pitch_val = ffs(pitch_val) - 1; | |
2575 | ||
2576 | val = obj->gtt_offset; | |
2577 | if (obj->tiling_mode == I915_TILING_Y) | |
2578 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
2579 | val |= I915_FENCE_SIZE_BITS(size); | |
2580 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
2581 | val |= I830_FENCE_REG_VALID; | |
2582 | } else | |
2583 | val = 0; | |
2584 | ||
2585 | if (reg < 8) | |
2586 | reg = FENCE_REG_830_0 + reg * 4; | |
2587 | else | |
2588 | reg = FENCE_REG_945_8 + (reg - 8) * 4; | |
2589 | ||
2590 | I915_WRITE(reg, val); | |
2591 | POSTING_READ(reg); | |
de151cf6 JB |
2592 | } |
2593 | ||
9ce079e4 CW |
2594 | static void i830_write_fence_reg(struct drm_device *dev, int reg, |
2595 | struct drm_i915_gem_object *obj) | |
de151cf6 | 2596 | { |
de151cf6 | 2597 | drm_i915_private_t *dev_priv = dev->dev_private; |
de151cf6 | 2598 | uint32_t val; |
de151cf6 | 2599 | |
9ce079e4 CW |
2600 | if (obj) { |
2601 | u32 size = obj->gtt_space->size; | |
2602 | uint32_t pitch_val; | |
de151cf6 | 2603 | |
9ce079e4 CW |
2604 | WARN((obj->gtt_offset & ~I830_FENCE_START_MASK) || |
2605 | (size & -size) != size || | |
2606 | (obj->gtt_offset & (size - 1)), | |
2607 | "object 0x%08x not 512K or pot-size 0x%08x aligned\n", | |
2608 | obj->gtt_offset, size); | |
e76a16de | 2609 | |
9ce079e4 CW |
2610 | pitch_val = obj->stride / 128; |
2611 | pitch_val = ffs(pitch_val) - 1; | |
de151cf6 | 2612 | |
9ce079e4 CW |
2613 | val = obj->gtt_offset; |
2614 | if (obj->tiling_mode == I915_TILING_Y) | |
2615 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
2616 | val |= I830_FENCE_SIZE_BITS(size); | |
2617 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
2618 | val |= I830_FENCE_REG_VALID; | |
2619 | } else | |
2620 | val = 0; | |
c6642782 | 2621 | |
9ce079e4 CW |
2622 | I915_WRITE(FENCE_REG_830_0 + reg * 4, val); |
2623 | POSTING_READ(FENCE_REG_830_0 + reg * 4); | |
2624 | } | |
2625 | ||
2626 | static void i915_gem_write_fence(struct drm_device *dev, int reg, | |
2627 | struct drm_i915_gem_object *obj) | |
2628 | { | |
2629 | switch (INTEL_INFO(dev)->gen) { | |
2630 | case 7: | |
2631 | case 6: sandybridge_write_fence_reg(dev, reg, obj); break; | |
2632 | case 5: | |
2633 | case 4: i965_write_fence_reg(dev, reg, obj); break; | |
2634 | case 3: i915_write_fence_reg(dev, reg, obj); break; | |
2635 | case 2: i830_write_fence_reg(dev, reg, obj); break; | |
2636 | default: break; | |
2637 | } | |
de151cf6 JB |
2638 | } |
2639 | ||
61050808 CW |
2640 | static inline int fence_number(struct drm_i915_private *dev_priv, |
2641 | struct drm_i915_fence_reg *fence) | |
2642 | { | |
2643 | return fence - dev_priv->fence_regs; | |
2644 | } | |
2645 | ||
2646 | static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, | |
2647 | struct drm_i915_fence_reg *fence, | |
2648 | bool enable) | |
2649 | { | |
2650 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
2651 | int reg = fence_number(dev_priv, fence); | |
2652 | ||
2653 | i915_gem_write_fence(obj->base.dev, reg, enable ? obj : NULL); | |
2654 | ||
2655 | if (enable) { | |
2656 | obj->fence_reg = reg; | |
2657 | fence->obj = obj; | |
2658 | list_move_tail(&fence->lru_list, &dev_priv->mm.fence_list); | |
2659 | } else { | |
2660 | obj->fence_reg = I915_FENCE_REG_NONE; | |
2661 | fence->obj = NULL; | |
2662 | list_del_init(&fence->lru_list); | |
2663 | } | |
2664 | } | |
2665 | ||
d9e86c0e | 2666 | static int |
a360bb1a | 2667 | i915_gem_object_flush_fence(struct drm_i915_gem_object *obj) |
d9e86c0e | 2668 | { |
1c293ea3 | 2669 | if (obj->last_fenced_seqno) { |
86d5bc37 | 2670 | int ret = i915_wait_seqno(obj->ring, obj->last_fenced_seqno); |
18991845 CW |
2671 | if (ret) |
2672 | return ret; | |
d9e86c0e CW |
2673 | |
2674 | obj->last_fenced_seqno = 0; | |
d9e86c0e CW |
2675 | } |
2676 | ||
63256ec5 CW |
2677 | /* Ensure that all CPU reads are completed before installing a fence |
2678 | * and all writes before removing the fence. | |
2679 | */ | |
2680 | if (obj->base.read_domains & I915_GEM_DOMAIN_GTT) | |
2681 | mb(); | |
2682 | ||
86d5bc37 | 2683 | obj->fenced_gpu_access = false; |
d9e86c0e CW |
2684 | return 0; |
2685 | } | |
2686 | ||
2687 | int | |
2688 | i915_gem_object_put_fence(struct drm_i915_gem_object *obj) | |
2689 | { | |
61050808 | 2690 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
d9e86c0e CW |
2691 | int ret; |
2692 | ||
a360bb1a | 2693 | ret = i915_gem_object_flush_fence(obj); |
d9e86c0e CW |
2694 | if (ret) |
2695 | return ret; | |
2696 | ||
61050808 CW |
2697 | if (obj->fence_reg == I915_FENCE_REG_NONE) |
2698 | return 0; | |
d9e86c0e | 2699 | |
61050808 CW |
2700 | i915_gem_object_update_fence(obj, |
2701 | &dev_priv->fence_regs[obj->fence_reg], | |
2702 | false); | |
2703 | i915_gem_object_fence_lost(obj); | |
d9e86c0e CW |
2704 | |
2705 | return 0; | |
2706 | } | |
2707 | ||
2708 | static struct drm_i915_fence_reg * | |
a360bb1a | 2709 | i915_find_fence_reg(struct drm_device *dev) |
ae3db24a | 2710 | { |
ae3db24a | 2711 | struct drm_i915_private *dev_priv = dev->dev_private; |
8fe301ad | 2712 | struct drm_i915_fence_reg *reg, *avail; |
d9e86c0e | 2713 | int i; |
ae3db24a DV |
2714 | |
2715 | /* First try to find a free reg */ | |
d9e86c0e | 2716 | avail = NULL; |
ae3db24a DV |
2717 | for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { |
2718 | reg = &dev_priv->fence_regs[i]; | |
2719 | if (!reg->obj) | |
d9e86c0e | 2720 | return reg; |
ae3db24a | 2721 | |
1690e1eb | 2722 | if (!reg->pin_count) |
d9e86c0e | 2723 | avail = reg; |
ae3db24a DV |
2724 | } |
2725 | ||
d9e86c0e CW |
2726 | if (avail == NULL) |
2727 | return NULL; | |
ae3db24a DV |
2728 | |
2729 | /* None available, try to steal one or wait for a user to finish */ | |
d9e86c0e | 2730 | list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) { |
1690e1eb | 2731 | if (reg->pin_count) |
ae3db24a DV |
2732 | continue; |
2733 | ||
8fe301ad | 2734 | return reg; |
ae3db24a DV |
2735 | } |
2736 | ||
8fe301ad | 2737 | return NULL; |
ae3db24a DV |
2738 | } |
2739 | ||
de151cf6 | 2740 | /** |
9a5a53b3 | 2741 | * i915_gem_object_get_fence - set up fencing for an object |
de151cf6 JB |
2742 | * @obj: object to map through a fence reg |
2743 | * | |
2744 | * When mapping objects through the GTT, userspace wants to be able to write | |
2745 | * to them without having to worry about swizzling if the object is tiled. | |
de151cf6 JB |
2746 | * This function walks the fence regs looking for a free one for @obj, |
2747 | * stealing one if it can't find any. | |
2748 | * | |
2749 | * It then sets up the reg based on the object's properties: address, pitch | |
2750 | * and tiling format. | |
9a5a53b3 CW |
2751 | * |
2752 | * For an untiled surface, this removes any existing fence. | |
de151cf6 | 2753 | */ |
8c4b8c3f | 2754 | int |
06d98131 | 2755 | i915_gem_object_get_fence(struct drm_i915_gem_object *obj) |
de151cf6 | 2756 | { |
05394f39 | 2757 | struct drm_device *dev = obj->base.dev; |
79e53945 | 2758 | struct drm_i915_private *dev_priv = dev->dev_private; |
14415745 | 2759 | bool enable = obj->tiling_mode != I915_TILING_NONE; |
d9e86c0e | 2760 | struct drm_i915_fence_reg *reg; |
ae3db24a | 2761 | int ret; |
de151cf6 | 2762 | |
14415745 CW |
2763 | /* Have we updated the tiling parameters upon the object and so |
2764 | * will need to serialise the write to the associated fence register? | |
2765 | */ | |
5d82e3e6 | 2766 | if (obj->fence_dirty) { |
14415745 CW |
2767 | ret = i915_gem_object_flush_fence(obj); |
2768 | if (ret) | |
2769 | return ret; | |
2770 | } | |
9a5a53b3 | 2771 | |
d9e86c0e | 2772 | /* Just update our place in the LRU if our fence is getting reused. */ |
05394f39 CW |
2773 | if (obj->fence_reg != I915_FENCE_REG_NONE) { |
2774 | reg = &dev_priv->fence_regs[obj->fence_reg]; | |
5d82e3e6 | 2775 | if (!obj->fence_dirty) { |
14415745 CW |
2776 | list_move_tail(®->lru_list, |
2777 | &dev_priv->mm.fence_list); | |
2778 | return 0; | |
2779 | } | |
2780 | } else if (enable) { | |
2781 | reg = i915_find_fence_reg(dev); | |
2782 | if (reg == NULL) | |
2783 | return -EDEADLK; | |
d9e86c0e | 2784 | |
14415745 CW |
2785 | if (reg->obj) { |
2786 | struct drm_i915_gem_object *old = reg->obj; | |
2787 | ||
2788 | ret = i915_gem_object_flush_fence(old); | |
29c5a587 CW |
2789 | if (ret) |
2790 | return ret; | |
2791 | ||
14415745 | 2792 | i915_gem_object_fence_lost(old); |
29c5a587 | 2793 | } |
14415745 | 2794 | } else |
a09ba7fa | 2795 | return 0; |
a09ba7fa | 2796 | |
14415745 | 2797 | i915_gem_object_update_fence(obj, reg, enable); |
5d82e3e6 | 2798 | obj->fence_dirty = false; |
14415745 | 2799 | |
9ce079e4 | 2800 | return 0; |
de151cf6 JB |
2801 | } |
2802 | ||
42d6ab48 CW |
2803 | static bool i915_gem_valid_gtt_space(struct drm_device *dev, |
2804 | struct drm_mm_node *gtt_space, | |
2805 | unsigned long cache_level) | |
2806 | { | |
2807 | struct drm_mm_node *other; | |
2808 | ||
2809 | /* On non-LLC machines we have to be careful when putting differing | |
2810 | * types of snoopable memory together to avoid the prefetcher | |
2811 | * crossing memory domains and dieing. | |
2812 | */ | |
2813 | if (HAS_LLC(dev)) | |
2814 | return true; | |
2815 | ||
2816 | if (gtt_space == NULL) | |
2817 | return true; | |
2818 | ||
2819 | if (list_empty(>t_space->node_list)) | |
2820 | return true; | |
2821 | ||
2822 | other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list); | |
2823 | if (other->allocated && !other->hole_follows && other->color != cache_level) | |
2824 | return false; | |
2825 | ||
2826 | other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list); | |
2827 | if (other->allocated && !gtt_space->hole_follows && other->color != cache_level) | |
2828 | return false; | |
2829 | ||
2830 | return true; | |
2831 | } | |
2832 | ||
2833 | static void i915_gem_verify_gtt(struct drm_device *dev) | |
2834 | { | |
2835 | #if WATCH_GTT | |
2836 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2837 | struct drm_i915_gem_object *obj; | |
2838 | int err = 0; | |
2839 | ||
2840 | list_for_each_entry(obj, &dev_priv->mm.gtt_list, gtt_list) { | |
2841 | if (obj->gtt_space == NULL) { | |
2842 | printk(KERN_ERR "object found on GTT list with no space reserved\n"); | |
2843 | err++; | |
2844 | continue; | |
2845 | } | |
2846 | ||
2847 | if (obj->cache_level != obj->gtt_space->color) { | |
2848 | printk(KERN_ERR "object reserved space [%08lx, %08lx] with wrong color, cache_level=%x, color=%lx\n", | |
2849 | obj->gtt_space->start, | |
2850 | obj->gtt_space->start + obj->gtt_space->size, | |
2851 | obj->cache_level, | |
2852 | obj->gtt_space->color); | |
2853 | err++; | |
2854 | continue; | |
2855 | } | |
2856 | ||
2857 | if (!i915_gem_valid_gtt_space(dev, | |
2858 | obj->gtt_space, | |
2859 | obj->cache_level)) { | |
2860 | printk(KERN_ERR "invalid GTT space found at [%08lx, %08lx] - color=%x\n", | |
2861 | obj->gtt_space->start, | |
2862 | obj->gtt_space->start + obj->gtt_space->size, | |
2863 | obj->cache_level); | |
2864 | err++; | |
2865 | continue; | |
2866 | } | |
2867 | } | |
2868 | ||
2869 | WARN_ON(err); | |
2870 | #endif | |
2871 | } | |
2872 | ||
673a394b EA |
2873 | /** |
2874 | * Finds free space in the GTT aperture and binds the object there. | |
2875 | */ | |
2876 | static int | |
05394f39 | 2877 | i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, |
920afa77 | 2878 | unsigned alignment, |
86a1ee26 CW |
2879 | bool map_and_fenceable, |
2880 | bool nonblocking) | |
673a394b | 2881 | { |
05394f39 | 2882 | struct drm_device *dev = obj->base.dev; |
673a394b | 2883 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b | 2884 | struct drm_mm_node *free_space; |
5e783301 | 2885 | u32 size, fence_size, fence_alignment, unfenced_alignment; |
75e9e915 | 2886 | bool mappable, fenceable; |
07f73f69 | 2887 | int ret; |
673a394b | 2888 | |
05394f39 | 2889 | if (obj->madv != I915_MADV_WILLNEED) { |
3ef94daa CW |
2890 | DRM_ERROR("Attempting to bind a purgeable object\n"); |
2891 | return -EINVAL; | |
2892 | } | |
2893 | ||
e28f8711 CW |
2894 | fence_size = i915_gem_get_gtt_size(dev, |
2895 | obj->base.size, | |
2896 | obj->tiling_mode); | |
2897 | fence_alignment = i915_gem_get_gtt_alignment(dev, | |
2898 | obj->base.size, | |
2899 | obj->tiling_mode); | |
2900 | unfenced_alignment = | |
2901 | i915_gem_get_unfenced_gtt_alignment(dev, | |
2902 | obj->base.size, | |
2903 | obj->tiling_mode); | |
a00b10c3 | 2904 | |
673a394b | 2905 | if (alignment == 0) |
5e783301 DV |
2906 | alignment = map_and_fenceable ? fence_alignment : |
2907 | unfenced_alignment; | |
75e9e915 | 2908 | if (map_and_fenceable && alignment & (fence_alignment - 1)) { |
673a394b EA |
2909 | DRM_ERROR("Invalid object alignment requested %u\n", alignment); |
2910 | return -EINVAL; | |
2911 | } | |
2912 | ||
05394f39 | 2913 | size = map_and_fenceable ? fence_size : obj->base.size; |
a00b10c3 | 2914 | |
654fc607 CW |
2915 | /* If the object is bigger than the entire aperture, reject it early |
2916 | * before evicting everything in a vain attempt to find space. | |
2917 | */ | |
05394f39 | 2918 | if (obj->base.size > |
75e9e915 | 2919 | (map_and_fenceable ? dev_priv->mm.gtt_mappable_end : dev_priv->mm.gtt_total)) { |
654fc607 CW |
2920 | DRM_ERROR("Attempting to bind an object larger than the aperture\n"); |
2921 | return -E2BIG; | |
2922 | } | |
2923 | ||
37e680a1 | 2924 | ret = i915_gem_object_get_pages(obj); |
6c085a72 CW |
2925 | if (ret) |
2926 | return ret; | |
2927 | ||
fbdda6fb CW |
2928 | i915_gem_object_pin_pages(obj); |
2929 | ||
673a394b | 2930 | search_free: |
75e9e915 | 2931 | if (map_and_fenceable) |
920afa77 | 2932 | free_space = |
42d6ab48 CW |
2933 | drm_mm_search_free_in_range_color(&dev_priv->mm.gtt_space, |
2934 | size, alignment, obj->cache_level, | |
2935 | 0, dev_priv->mm.gtt_mappable_end, | |
2936 | false); | |
920afa77 | 2937 | else |
42d6ab48 CW |
2938 | free_space = drm_mm_search_free_color(&dev_priv->mm.gtt_space, |
2939 | size, alignment, obj->cache_level, | |
2940 | false); | |
920afa77 DV |
2941 | |
2942 | if (free_space != NULL) { | |
75e9e915 | 2943 | if (map_and_fenceable) |
05394f39 | 2944 | obj->gtt_space = |
920afa77 | 2945 | drm_mm_get_block_range_generic(free_space, |
42d6ab48 | 2946 | size, alignment, obj->cache_level, |
6b9d89b4 | 2947 | 0, dev_priv->mm.gtt_mappable_end, |
42d6ab48 | 2948 | false); |
920afa77 | 2949 | else |
05394f39 | 2950 | obj->gtt_space = |
42d6ab48 CW |
2951 | drm_mm_get_block_generic(free_space, |
2952 | size, alignment, obj->cache_level, | |
2953 | false); | |
920afa77 | 2954 | } |
05394f39 | 2955 | if (obj->gtt_space == NULL) { |
75e9e915 | 2956 | ret = i915_gem_evict_something(dev, size, alignment, |
42d6ab48 | 2957 | obj->cache_level, |
86a1ee26 CW |
2958 | map_and_fenceable, |
2959 | nonblocking); | |
fbdda6fb CW |
2960 | if (ret) { |
2961 | i915_gem_object_unpin_pages(obj); | |
673a394b | 2962 | return ret; |
fbdda6fb | 2963 | } |
9731129c | 2964 | |
673a394b EA |
2965 | goto search_free; |
2966 | } | |
42d6ab48 CW |
2967 | if (WARN_ON(!i915_gem_valid_gtt_space(dev, |
2968 | obj->gtt_space, | |
2969 | obj->cache_level))) { | |
fbdda6fb | 2970 | i915_gem_object_unpin_pages(obj); |
05394f39 CW |
2971 | drm_mm_put_block(obj->gtt_space); |
2972 | obj->gtt_space = NULL; | |
42d6ab48 | 2973 | return -EINVAL; |
673a394b EA |
2974 | } |
2975 | ||
673a394b | 2976 | |
74163907 | 2977 | ret = i915_gem_gtt_prepare_object(obj); |
7c2e6fdf | 2978 | if (ret) { |
fbdda6fb | 2979 | i915_gem_object_unpin_pages(obj); |
05394f39 CW |
2980 | drm_mm_put_block(obj->gtt_space); |
2981 | obj->gtt_space = NULL; | |
6c085a72 | 2982 | return ret; |
673a394b | 2983 | } |
673a394b | 2984 | |
0ebb9829 DV |
2985 | if (!dev_priv->mm.aliasing_ppgtt) |
2986 | i915_gem_gtt_bind_object(obj, obj->cache_level); | |
673a394b | 2987 | |
6c085a72 | 2988 | list_move_tail(&obj->gtt_list, &dev_priv->mm.bound_list); |
05394f39 | 2989 | list_add_tail(&obj->mm_list, &dev_priv->mm.inactive_list); |
bf1a1092 | 2990 | |
6299f992 | 2991 | obj->gtt_offset = obj->gtt_space->start; |
1c5d22f7 | 2992 | |
75e9e915 | 2993 | fenceable = |
05394f39 | 2994 | obj->gtt_space->size == fence_size && |
0206e353 | 2995 | (obj->gtt_space->start & (fence_alignment - 1)) == 0; |
a00b10c3 | 2996 | |
75e9e915 | 2997 | mappable = |
05394f39 | 2998 | obj->gtt_offset + obj->base.size <= dev_priv->mm.gtt_mappable_end; |
a00b10c3 | 2999 | |
05394f39 | 3000 | obj->map_and_fenceable = mappable && fenceable; |
75e9e915 | 3001 | |
fbdda6fb | 3002 | i915_gem_object_unpin_pages(obj); |
db53a302 | 3003 | trace_i915_gem_object_bind(obj, map_and_fenceable); |
42d6ab48 | 3004 | i915_gem_verify_gtt(dev); |
673a394b EA |
3005 | return 0; |
3006 | } | |
3007 | ||
3008 | void | |
05394f39 | 3009 | i915_gem_clflush_object(struct drm_i915_gem_object *obj) |
673a394b | 3010 | { |
673a394b EA |
3011 | /* If we don't have a page list set up, then we're not pinned |
3012 | * to GPU, and we can ignore the cache flush because it'll happen | |
3013 | * again at bind time. | |
3014 | */ | |
05394f39 | 3015 | if (obj->pages == NULL) |
673a394b EA |
3016 | return; |
3017 | ||
9c23f7fc CW |
3018 | /* If the GPU is snooping the contents of the CPU cache, |
3019 | * we do not need to manually clear the CPU cache lines. However, | |
3020 | * the caches are only snooped when the render cache is | |
3021 | * flushed/invalidated. As we always have to emit invalidations | |
3022 | * and flushes when moving into and out of the RENDER domain, correct | |
3023 | * snooping behaviour occurs naturally as the result of our domain | |
3024 | * tracking. | |
3025 | */ | |
3026 | if (obj->cache_level != I915_CACHE_NONE) | |
3027 | return; | |
3028 | ||
1c5d22f7 | 3029 | trace_i915_gem_object_clflush(obj); |
cfa16a0d | 3030 | |
9da3da66 | 3031 | drm_clflush_sg(obj->pages); |
e47c68e9 EA |
3032 | } |
3033 | ||
3034 | /** Flushes the GTT write domain for the object if it's dirty. */ | |
3035 | static void | |
05394f39 | 3036 | i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj) |
e47c68e9 | 3037 | { |
1c5d22f7 CW |
3038 | uint32_t old_write_domain; |
3039 | ||
05394f39 | 3040 | if (obj->base.write_domain != I915_GEM_DOMAIN_GTT) |
e47c68e9 EA |
3041 | return; |
3042 | ||
63256ec5 | 3043 | /* No actual flushing is required for the GTT write domain. Writes |
e47c68e9 EA |
3044 | * to it immediately go to main memory as far as we know, so there's |
3045 | * no chipset flush. It also doesn't land in render cache. | |
63256ec5 CW |
3046 | * |
3047 | * However, we do have to enforce the order so that all writes through | |
3048 | * the GTT land before any writes to the device, such as updates to | |
3049 | * the GATT itself. | |
e47c68e9 | 3050 | */ |
63256ec5 CW |
3051 | wmb(); |
3052 | ||
05394f39 CW |
3053 | old_write_domain = obj->base.write_domain; |
3054 | obj->base.write_domain = 0; | |
1c5d22f7 CW |
3055 | |
3056 | trace_i915_gem_object_change_domain(obj, | |
05394f39 | 3057 | obj->base.read_domains, |
1c5d22f7 | 3058 | old_write_domain); |
e47c68e9 EA |
3059 | } |
3060 | ||
3061 | /** Flushes the CPU write domain for the object if it's dirty. */ | |
3062 | static void | |
05394f39 | 3063 | i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj) |
e47c68e9 | 3064 | { |
1c5d22f7 | 3065 | uint32_t old_write_domain; |
e47c68e9 | 3066 | |
05394f39 | 3067 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) |
e47c68e9 EA |
3068 | return; |
3069 | ||
3070 | i915_gem_clflush_object(obj); | |
e76e9aeb | 3071 | i915_gem_chipset_flush(obj->base.dev); |
05394f39 CW |
3072 | old_write_domain = obj->base.write_domain; |
3073 | obj->base.write_domain = 0; | |
1c5d22f7 CW |
3074 | |
3075 | trace_i915_gem_object_change_domain(obj, | |
05394f39 | 3076 | obj->base.read_domains, |
1c5d22f7 | 3077 | old_write_domain); |
e47c68e9 EA |
3078 | } |
3079 | ||
2ef7eeaa EA |
3080 | /** |
3081 | * Moves a single object to the GTT read, and possibly write domain. | |
3082 | * | |
3083 | * This function returns when the move is complete, including waiting on | |
3084 | * flushes to occur. | |
3085 | */ | |
79e53945 | 3086 | int |
2021746e | 3087 | i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write) |
2ef7eeaa | 3088 | { |
8325a09d | 3089 | drm_i915_private_t *dev_priv = obj->base.dev->dev_private; |
1c5d22f7 | 3090 | uint32_t old_write_domain, old_read_domains; |
e47c68e9 | 3091 | int ret; |
2ef7eeaa | 3092 | |
02354392 | 3093 | /* Not valid to be called on unbound objects. */ |
05394f39 | 3094 | if (obj->gtt_space == NULL) |
02354392 EA |
3095 | return -EINVAL; |
3096 | ||
8d7e3de1 CW |
3097 | if (obj->base.write_domain == I915_GEM_DOMAIN_GTT) |
3098 | return 0; | |
3099 | ||
0201f1ec | 3100 | ret = i915_gem_object_wait_rendering(obj, !write); |
88241785 CW |
3101 | if (ret) |
3102 | return ret; | |
3103 | ||
7213342d | 3104 | i915_gem_object_flush_cpu_write_domain(obj); |
1c5d22f7 | 3105 | |
05394f39 CW |
3106 | old_write_domain = obj->base.write_domain; |
3107 | old_read_domains = obj->base.read_domains; | |
1c5d22f7 | 3108 | |
e47c68e9 EA |
3109 | /* It should now be out of any other write domains, and we can update |
3110 | * the domain values for our changes. | |
3111 | */ | |
05394f39 CW |
3112 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0); |
3113 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; | |
e47c68e9 | 3114 | if (write) { |
05394f39 CW |
3115 | obj->base.read_domains = I915_GEM_DOMAIN_GTT; |
3116 | obj->base.write_domain = I915_GEM_DOMAIN_GTT; | |
3117 | obj->dirty = 1; | |
2ef7eeaa EA |
3118 | } |
3119 | ||
1c5d22f7 CW |
3120 | trace_i915_gem_object_change_domain(obj, |
3121 | old_read_domains, | |
3122 | old_write_domain); | |
3123 | ||
8325a09d CW |
3124 | /* And bump the LRU for this access */ |
3125 | if (i915_gem_object_is_inactive(obj)) | |
3126 | list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list); | |
3127 | ||
e47c68e9 EA |
3128 | return 0; |
3129 | } | |
3130 | ||
e4ffd173 CW |
3131 | int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj, |
3132 | enum i915_cache_level cache_level) | |
3133 | { | |
7bddb01f DV |
3134 | struct drm_device *dev = obj->base.dev; |
3135 | drm_i915_private_t *dev_priv = dev->dev_private; | |
e4ffd173 CW |
3136 | int ret; |
3137 | ||
3138 | if (obj->cache_level == cache_level) | |
3139 | return 0; | |
3140 | ||
3141 | if (obj->pin_count) { | |
3142 | DRM_DEBUG("can not change the cache level of pinned objects\n"); | |
3143 | return -EBUSY; | |
3144 | } | |
3145 | ||
42d6ab48 CW |
3146 | if (!i915_gem_valid_gtt_space(dev, obj->gtt_space, cache_level)) { |
3147 | ret = i915_gem_object_unbind(obj); | |
3148 | if (ret) | |
3149 | return ret; | |
3150 | } | |
3151 | ||
e4ffd173 CW |
3152 | if (obj->gtt_space) { |
3153 | ret = i915_gem_object_finish_gpu(obj); | |
3154 | if (ret) | |
3155 | return ret; | |
3156 | ||
3157 | i915_gem_object_finish_gtt(obj); | |
3158 | ||
3159 | /* Before SandyBridge, you could not use tiling or fence | |
3160 | * registers with snooped memory, so relinquish any fences | |
3161 | * currently pointing to our region in the aperture. | |
3162 | */ | |
42d6ab48 | 3163 | if (INTEL_INFO(dev)->gen < 6) { |
e4ffd173 CW |
3164 | ret = i915_gem_object_put_fence(obj); |
3165 | if (ret) | |
3166 | return ret; | |
3167 | } | |
3168 | ||
74898d7e DV |
3169 | if (obj->has_global_gtt_mapping) |
3170 | i915_gem_gtt_bind_object(obj, cache_level); | |
7bddb01f DV |
3171 | if (obj->has_aliasing_ppgtt_mapping) |
3172 | i915_ppgtt_bind_object(dev_priv->mm.aliasing_ppgtt, | |
3173 | obj, cache_level); | |
42d6ab48 CW |
3174 | |
3175 | obj->gtt_space->color = cache_level; | |
e4ffd173 CW |
3176 | } |
3177 | ||
3178 | if (cache_level == I915_CACHE_NONE) { | |
3179 | u32 old_read_domains, old_write_domain; | |
3180 | ||
3181 | /* If we're coming from LLC cached, then we haven't | |
3182 | * actually been tracking whether the data is in the | |
3183 | * CPU cache or not, since we only allow one bit set | |
3184 | * in obj->write_domain and have been skipping the clflushes. | |
3185 | * Just set it to the CPU cache for now. | |
3186 | */ | |
3187 | WARN_ON(obj->base.write_domain & ~I915_GEM_DOMAIN_CPU); | |
3188 | WARN_ON(obj->base.read_domains & ~I915_GEM_DOMAIN_CPU); | |
3189 | ||
3190 | old_read_domains = obj->base.read_domains; | |
3191 | old_write_domain = obj->base.write_domain; | |
3192 | ||
3193 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; | |
3194 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
3195 | ||
3196 | trace_i915_gem_object_change_domain(obj, | |
3197 | old_read_domains, | |
3198 | old_write_domain); | |
3199 | } | |
3200 | ||
3201 | obj->cache_level = cache_level; | |
42d6ab48 | 3202 | i915_gem_verify_gtt(dev); |
e4ffd173 CW |
3203 | return 0; |
3204 | } | |
3205 | ||
199adf40 BW |
3206 | int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data, |
3207 | struct drm_file *file) | |
e6994aee | 3208 | { |
199adf40 | 3209 | struct drm_i915_gem_caching *args = data; |
e6994aee CW |
3210 | struct drm_i915_gem_object *obj; |
3211 | int ret; | |
3212 | ||
3213 | ret = i915_mutex_lock_interruptible(dev); | |
3214 | if (ret) | |
3215 | return ret; | |
3216 | ||
3217 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); | |
3218 | if (&obj->base == NULL) { | |
3219 | ret = -ENOENT; | |
3220 | goto unlock; | |
3221 | } | |
3222 | ||
199adf40 | 3223 | args->caching = obj->cache_level != I915_CACHE_NONE; |
e6994aee CW |
3224 | |
3225 | drm_gem_object_unreference(&obj->base); | |
3226 | unlock: | |
3227 | mutex_unlock(&dev->struct_mutex); | |
3228 | return ret; | |
3229 | } | |
3230 | ||
199adf40 BW |
3231 | int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data, |
3232 | struct drm_file *file) | |
e6994aee | 3233 | { |
199adf40 | 3234 | struct drm_i915_gem_caching *args = data; |
e6994aee CW |
3235 | struct drm_i915_gem_object *obj; |
3236 | enum i915_cache_level level; | |
3237 | int ret; | |
3238 | ||
199adf40 BW |
3239 | switch (args->caching) { |
3240 | case I915_CACHING_NONE: | |
e6994aee CW |
3241 | level = I915_CACHE_NONE; |
3242 | break; | |
199adf40 | 3243 | case I915_CACHING_CACHED: |
e6994aee CW |
3244 | level = I915_CACHE_LLC; |
3245 | break; | |
3246 | default: | |
3247 | return -EINVAL; | |
3248 | } | |
3249 | ||
3bc2913e BW |
3250 | ret = i915_mutex_lock_interruptible(dev); |
3251 | if (ret) | |
3252 | return ret; | |
3253 | ||
e6994aee CW |
3254 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
3255 | if (&obj->base == NULL) { | |
3256 | ret = -ENOENT; | |
3257 | goto unlock; | |
3258 | } | |
3259 | ||
3260 | ret = i915_gem_object_set_cache_level(obj, level); | |
3261 | ||
3262 | drm_gem_object_unreference(&obj->base); | |
3263 | unlock: | |
3264 | mutex_unlock(&dev->struct_mutex); | |
3265 | return ret; | |
3266 | } | |
3267 | ||
b9241ea3 | 3268 | /* |
2da3b9b9 CW |
3269 | * Prepare buffer for display plane (scanout, cursors, etc). |
3270 | * Can be called from an uninterruptible phase (modesetting) and allows | |
3271 | * any flushes to be pipelined (for pageflips). | |
b9241ea3 ZW |
3272 | */ |
3273 | int | |
2da3b9b9 CW |
3274 | i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, |
3275 | u32 alignment, | |
919926ae | 3276 | struct intel_ring_buffer *pipelined) |
b9241ea3 | 3277 | { |
2da3b9b9 | 3278 | u32 old_read_domains, old_write_domain; |
b9241ea3 ZW |
3279 | int ret; |
3280 | ||
0be73284 | 3281 | if (pipelined != obj->ring) { |
2911a35b BW |
3282 | ret = i915_gem_object_sync(obj, pipelined); |
3283 | if (ret) | |
b9241ea3 ZW |
3284 | return ret; |
3285 | } | |
3286 | ||
a7ef0640 EA |
3287 | /* The display engine is not coherent with the LLC cache on gen6. As |
3288 | * a result, we make sure that the pinning that is about to occur is | |
3289 | * done with uncached PTEs. This is lowest common denominator for all | |
3290 | * chipsets. | |
3291 | * | |
3292 | * However for gen6+, we could do better by using the GFDT bit instead | |
3293 | * of uncaching, which would allow us to flush all the LLC-cached data | |
3294 | * with that bit in the PTE to main memory with just one PIPE_CONTROL. | |
3295 | */ | |
3296 | ret = i915_gem_object_set_cache_level(obj, I915_CACHE_NONE); | |
3297 | if (ret) | |
3298 | return ret; | |
3299 | ||
2da3b9b9 CW |
3300 | /* As the user may map the buffer once pinned in the display plane |
3301 | * (e.g. libkms for the bootup splash), we have to ensure that we | |
3302 | * always use map_and_fenceable for all scanout buffers. | |
3303 | */ | |
86a1ee26 | 3304 | ret = i915_gem_object_pin(obj, alignment, true, false); |
2da3b9b9 CW |
3305 | if (ret) |
3306 | return ret; | |
3307 | ||
b118c1e3 CW |
3308 | i915_gem_object_flush_cpu_write_domain(obj); |
3309 | ||
2da3b9b9 | 3310 | old_write_domain = obj->base.write_domain; |
05394f39 | 3311 | old_read_domains = obj->base.read_domains; |
2da3b9b9 CW |
3312 | |
3313 | /* It should now be out of any other write domains, and we can update | |
3314 | * the domain values for our changes. | |
3315 | */ | |
e5f1d962 | 3316 | obj->base.write_domain = 0; |
05394f39 | 3317 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; |
b9241ea3 ZW |
3318 | |
3319 | trace_i915_gem_object_change_domain(obj, | |
3320 | old_read_domains, | |
2da3b9b9 | 3321 | old_write_domain); |
b9241ea3 ZW |
3322 | |
3323 | return 0; | |
3324 | } | |
3325 | ||
85345517 | 3326 | int |
a8198eea | 3327 | i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj) |
85345517 | 3328 | { |
88241785 CW |
3329 | int ret; |
3330 | ||
a8198eea | 3331 | if ((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0) |
85345517 CW |
3332 | return 0; |
3333 | ||
0201f1ec | 3334 | ret = i915_gem_object_wait_rendering(obj, false); |
c501ae7f CW |
3335 | if (ret) |
3336 | return ret; | |
3337 | ||
a8198eea CW |
3338 | /* Ensure that we invalidate the GPU's caches and TLBs. */ |
3339 | obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS; | |
c501ae7f | 3340 | return 0; |
85345517 CW |
3341 | } |
3342 | ||
e47c68e9 EA |
3343 | /** |
3344 | * Moves a single object to the CPU read, and possibly write domain. | |
3345 | * | |
3346 | * This function returns when the move is complete, including waiting on | |
3347 | * flushes to occur. | |
3348 | */ | |
dabdfe02 | 3349 | int |
919926ae | 3350 | i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write) |
e47c68e9 | 3351 | { |
1c5d22f7 | 3352 | uint32_t old_write_domain, old_read_domains; |
e47c68e9 EA |
3353 | int ret; |
3354 | ||
8d7e3de1 CW |
3355 | if (obj->base.write_domain == I915_GEM_DOMAIN_CPU) |
3356 | return 0; | |
3357 | ||
0201f1ec | 3358 | ret = i915_gem_object_wait_rendering(obj, !write); |
88241785 CW |
3359 | if (ret) |
3360 | return ret; | |
3361 | ||
e47c68e9 | 3362 | i915_gem_object_flush_gtt_write_domain(obj); |
2ef7eeaa | 3363 | |
05394f39 CW |
3364 | old_write_domain = obj->base.write_domain; |
3365 | old_read_domains = obj->base.read_domains; | |
1c5d22f7 | 3366 | |
e47c68e9 | 3367 | /* Flush the CPU cache if it's still invalid. */ |
05394f39 | 3368 | if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) { |
2ef7eeaa | 3369 | i915_gem_clflush_object(obj); |
2ef7eeaa | 3370 | |
05394f39 | 3371 | obj->base.read_domains |= I915_GEM_DOMAIN_CPU; |
2ef7eeaa EA |
3372 | } |
3373 | ||
3374 | /* It should now be out of any other write domains, and we can update | |
3375 | * the domain values for our changes. | |
3376 | */ | |
05394f39 | 3377 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) != 0); |
e47c68e9 EA |
3378 | |
3379 | /* If we're writing through the CPU, then the GPU read domains will | |
3380 | * need to be invalidated at next use. | |
3381 | */ | |
3382 | if (write) { | |
05394f39 CW |
3383 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; |
3384 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
e47c68e9 | 3385 | } |
2ef7eeaa | 3386 | |
1c5d22f7 CW |
3387 | trace_i915_gem_object_change_domain(obj, |
3388 | old_read_domains, | |
3389 | old_write_domain); | |
3390 | ||
2ef7eeaa EA |
3391 | return 0; |
3392 | } | |
3393 | ||
673a394b EA |
3394 | /* Throttle our rendering by waiting until the ring has completed our requests |
3395 | * emitted over 20 msec ago. | |
3396 | * | |
b962442e EA |
3397 | * Note that if we were to use the current jiffies each time around the loop, |
3398 | * we wouldn't escape the function with any frames outstanding if the time to | |
3399 | * render a frame was over 20ms. | |
3400 | * | |
673a394b EA |
3401 | * This should get us reasonable parallelism between CPU and GPU but also |
3402 | * relatively low latency when blocking on a particular request to finish. | |
3403 | */ | |
40a5f0de | 3404 | static int |
f787a5f5 | 3405 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file) |
40a5f0de | 3406 | { |
f787a5f5 CW |
3407 | struct drm_i915_private *dev_priv = dev->dev_private; |
3408 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
b962442e | 3409 | unsigned long recent_enough = jiffies - msecs_to_jiffies(20); |
f787a5f5 CW |
3410 | struct drm_i915_gem_request *request; |
3411 | struct intel_ring_buffer *ring = NULL; | |
3412 | u32 seqno = 0; | |
3413 | int ret; | |
93533c29 | 3414 | |
e110e8d6 CW |
3415 | if (atomic_read(&dev_priv->mm.wedged)) |
3416 | return -EIO; | |
3417 | ||
1c25595f | 3418 | spin_lock(&file_priv->mm.lock); |
f787a5f5 | 3419 | list_for_each_entry(request, &file_priv->mm.request_list, client_list) { |
b962442e EA |
3420 | if (time_after_eq(request->emitted_jiffies, recent_enough)) |
3421 | break; | |
40a5f0de | 3422 | |
f787a5f5 CW |
3423 | ring = request->ring; |
3424 | seqno = request->seqno; | |
b962442e | 3425 | } |
1c25595f | 3426 | spin_unlock(&file_priv->mm.lock); |
40a5f0de | 3427 | |
f787a5f5 CW |
3428 | if (seqno == 0) |
3429 | return 0; | |
2bc43b5c | 3430 | |
5c81fe85 | 3431 | ret = __wait_seqno(ring, seqno, true, NULL); |
f787a5f5 CW |
3432 | if (ret == 0) |
3433 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, 0); | |
40a5f0de EA |
3434 | |
3435 | return ret; | |
3436 | } | |
3437 | ||
673a394b | 3438 | int |
05394f39 CW |
3439 | i915_gem_object_pin(struct drm_i915_gem_object *obj, |
3440 | uint32_t alignment, | |
86a1ee26 CW |
3441 | bool map_and_fenceable, |
3442 | bool nonblocking) | |
673a394b | 3443 | { |
673a394b EA |
3444 | int ret; |
3445 | ||
7e81a42e CW |
3446 | if (WARN_ON(obj->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT)) |
3447 | return -EBUSY; | |
ac0c6b5a | 3448 | |
05394f39 CW |
3449 | if (obj->gtt_space != NULL) { |
3450 | if ((alignment && obj->gtt_offset & (alignment - 1)) || | |
3451 | (map_and_fenceable && !obj->map_and_fenceable)) { | |
3452 | WARN(obj->pin_count, | |
ae7d49d8 | 3453 | "bo is already pinned with incorrect alignment:" |
75e9e915 DV |
3454 | " offset=%x, req.alignment=%x, req.map_and_fenceable=%d," |
3455 | " obj->map_and_fenceable=%d\n", | |
05394f39 | 3456 | obj->gtt_offset, alignment, |
75e9e915 | 3457 | map_and_fenceable, |
05394f39 | 3458 | obj->map_and_fenceable); |
ac0c6b5a CW |
3459 | ret = i915_gem_object_unbind(obj); |
3460 | if (ret) | |
3461 | return ret; | |
3462 | } | |
3463 | } | |
3464 | ||
05394f39 | 3465 | if (obj->gtt_space == NULL) { |
a00b10c3 | 3466 | ret = i915_gem_object_bind_to_gtt(obj, alignment, |
86a1ee26 CW |
3467 | map_and_fenceable, |
3468 | nonblocking); | |
9731129c | 3469 | if (ret) |
673a394b | 3470 | return ret; |
22c344e9 | 3471 | } |
76446cac | 3472 | |
74898d7e DV |
3473 | if (!obj->has_global_gtt_mapping && map_and_fenceable) |
3474 | i915_gem_gtt_bind_object(obj, obj->cache_level); | |
3475 | ||
1b50247a | 3476 | obj->pin_count++; |
6299f992 | 3477 | obj->pin_mappable |= map_and_fenceable; |
673a394b EA |
3478 | |
3479 | return 0; | |
3480 | } | |
3481 | ||
3482 | void | |
05394f39 | 3483 | i915_gem_object_unpin(struct drm_i915_gem_object *obj) |
673a394b | 3484 | { |
05394f39 CW |
3485 | BUG_ON(obj->pin_count == 0); |
3486 | BUG_ON(obj->gtt_space == NULL); | |
673a394b | 3487 | |
1b50247a | 3488 | if (--obj->pin_count == 0) |
6299f992 | 3489 | obj->pin_mappable = false; |
673a394b EA |
3490 | } |
3491 | ||
3492 | int | |
3493 | i915_gem_pin_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 3494 | struct drm_file *file) |
673a394b EA |
3495 | { |
3496 | struct drm_i915_gem_pin *args = data; | |
05394f39 | 3497 | struct drm_i915_gem_object *obj; |
673a394b EA |
3498 | int ret; |
3499 | ||
1d7cfea1 CW |
3500 | ret = i915_mutex_lock_interruptible(dev); |
3501 | if (ret) | |
3502 | return ret; | |
673a394b | 3503 | |
05394f39 | 3504 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 3505 | if (&obj->base == NULL) { |
1d7cfea1 CW |
3506 | ret = -ENOENT; |
3507 | goto unlock; | |
673a394b | 3508 | } |
673a394b | 3509 | |
05394f39 | 3510 | if (obj->madv != I915_MADV_WILLNEED) { |
bb6baf76 | 3511 | DRM_ERROR("Attempting to pin a purgeable buffer\n"); |
1d7cfea1 CW |
3512 | ret = -EINVAL; |
3513 | goto out; | |
3ef94daa CW |
3514 | } |
3515 | ||
05394f39 | 3516 | if (obj->pin_filp != NULL && obj->pin_filp != file) { |
79e53945 JB |
3517 | DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n", |
3518 | args->handle); | |
1d7cfea1 CW |
3519 | ret = -EINVAL; |
3520 | goto out; | |
79e53945 JB |
3521 | } |
3522 | ||
05394f39 CW |
3523 | obj->user_pin_count++; |
3524 | obj->pin_filp = file; | |
3525 | if (obj->user_pin_count == 1) { | |
86a1ee26 | 3526 | ret = i915_gem_object_pin(obj, args->alignment, true, false); |
1d7cfea1 CW |
3527 | if (ret) |
3528 | goto out; | |
673a394b EA |
3529 | } |
3530 | ||
3531 | /* XXX - flush the CPU caches for pinned objects | |
3532 | * as the X server doesn't manage domains yet | |
3533 | */ | |
e47c68e9 | 3534 | i915_gem_object_flush_cpu_write_domain(obj); |
05394f39 | 3535 | args->offset = obj->gtt_offset; |
1d7cfea1 | 3536 | out: |
05394f39 | 3537 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 3538 | unlock: |
673a394b | 3539 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 3540 | return ret; |
673a394b EA |
3541 | } |
3542 | ||
3543 | int | |
3544 | i915_gem_unpin_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 3545 | struct drm_file *file) |
673a394b EA |
3546 | { |
3547 | struct drm_i915_gem_pin *args = data; | |
05394f39 | 3548 | struct drm_i915_gem_object *obj; |
76c1dec1 | 3549 | int ret; |
673a394b | 3550 | |
1d7cfea1 CW |
3551 | ret = i915_mutex_lock_interruptible(dev); |
3552 | if (ret) | |
3553 | return ret; | |
673a394b | 3554 | |
05394f39 | 3555 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 3556 | if (&obj->base == NULL) { |
1d7cfea1 CW |
3557 | ret = -ENOENT; |
3558 | goto unlock; | |
673a394b | 3559 | } |
76c1dec1 | 3560 | |
05394f39 | 3561 | if (obj->pin_filp != file) { |
79e53945 JB |
3562 | DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n", |
3563 | args->handle); | |
1d7cfea1 CW |
3564 | ret = -EINVAL; |
3565 | goto out; | |
79e53945 | 3566 | } |
05394f39 CW |
3567 | obj->user_pin_count--; |
3568 | if (obj->user_pin_count == 0) { | |
3569 | obj->pin_filp = NULL; | |
79e53945 JB |
3570 | i915_gem_object_unpin(obj); |
3571 | } | |
673a394b | 3572 | |
1d7cfea1 | 3573 | out: |
05394f39 | 3574 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 3575 | unlock: |
673a394b | 3576 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 3577 | return ret; |
673a394b EA |
3578 | } |
3579 | ||
3580 | int | |
3581 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 3582 | struct drm_file *file) |
673a394b EA |
3583 | { |
3584 | struct drm_i915_gem_busy *args = data; | |
05394f39 | 3585 | struct drm_i915_gem_object *obj; |
30dbf0c0 CW |
3586 | int ret; |
3587 | ||
76c1dec1 | 3588 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 3589 | if (ret) |
76c1dec1 | 3590 | return ret; |
673a394b | 3591 | |
05394f39 | 3592 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 3593 | if (&obj->base == NULL) { |
1d7cfea1 CW |
3594 | ret = -ENOENT; |
3595 | goto unlock; | |
673a394b | 3596 | } |
d1b851fc | 3597 | |
0be555b6 CW |
3598 | /* Count all active objects as busy, even if they are currently not used |
3599 | * by the gpu. Users of this interface expect objects to eventually | |
3600 | * become non-busy without any further actions, therefore emit any | |
3601 | * necessary flushes here. | |
c4de0a5d | 3602 | */ |
30dfebf3 | 3603 | ret = i915_gem_object_flush_active(obj); |
0be555b6 | 3604 | |
30dfebf3 | 3605 | args->busy = obj->active; |
e9808edd CW |
3606 | if (obj->ring) { |
3607 | BUILD_BUG_ON(I915_NUM_RINGS > 16); | |
3608 | args->busy |= intel_ring_flag(obj->ring) << 16; | |
3609 | } | |
673a394b | 3610 | |
05394f39 | 3611 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 3612 | unlock: |
673a394b | 3613 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 3614 | return ret; |
673a394b EA |
3615 | } |
3616 | ||
3617 | int | |
3618 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, | |
3619 | struct drm_file *file_priv) | |
3620 | { | |
0206e353 | 3621 | return i915_gem_ring_throttle(dev, file_priv); |
673a394b EA |
3622 | } |
3623 | ||
3ef94daa CW |
3624 | int |
3625 | i915_gem_madvise_ioctl(struct drm_device *dev, void *data, | |
3626 | struct drm_file *file_priv) | |
3627 | { | |
3628 | struct drm_i915_gem_madvise *args = data; | |
05394f39 | 3629 | struct drm_i915_gem_object *obj; |
76c1dec1 | 3630 | int ret; |
3ef94daa CW |
3631 | |
3632 | switch (args->madv) { | |
3633 | case I915_MADV_DONTNEED: | |
3634 | case I915_MADV_WILLNEED: | |
3635 | break; | |
3636 | default: | |
3637 | return -EINVAL; | |
3638 | } | |
3639 | ||
1d7cfea1 CW |
3640 | ret = i915_mutex_lock_interruptible(dev); |
3641 | if (ret) | |
3642 | return ret; | |
3643 | ||
05394f39 | 3644 | obj = to_intel_bo(drm_gem_object_lookup(dev, file_priv, args->handle)); |
c8725226 | 3645 | if (&obj->base == NULL) { |
1d7cfea1 CW |
3646 | ret = -ENOENT; |
3647 | goto unlock; | |
3ef94daa | 3648 | } |
3ef94daa | 3649 | |
05394f39 | 3650 | if (obj->pin_count) { |
1d7cfea1 CW |
3651 | ret = -EINVAL; |
3652 | goto out; | |
3ef94daa CW |
3653 | } |
3654 | ||
05394f39 CW |
3655 | if (obj->madv != __I915_MADV_PURGED) |
3656 | obj->madv = args->madv; | |
3ef94daa | 3657 | |
6c085a72 CW |
3658 | /* if the object is no longer attached, discard its backing storage */ |
3659 | if (i915_gem_object_is_purgeable(obj) && obj->pages == NULL) | |
2d7ef395 CW |
3660 | i915_gem_object_truncate(obj); |
3661 | ||
05394f39 | 3662 | args->retained = obj->madv != __I915_MADV_PURGED; |
bb6baf76 | 3663 | |
1d7cfea1 | 3664 | out: |
05394f39 | 3665 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 3666 | unlock: |
3ef94daa | 3667 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 3668 | return ret; |
3ef94daa CW |
3669 | } |
3670 | ||
37e680a1 CW |
3671 | void i915_gem_object_init(struct drm_i915_gem_object *obj, |
3672 | const struct drm_i915_gem_object_ops *ops) | |
0327d6ba | 3673 | { |
0327d6ba CW |
3674 | INIT_LIST_HEAD(&obj->mm_list); |
3675 | INIT_LIST_HEAD(&obj->gtt_list); | |
3676 | INIT_LIST_HEAD(&obj->ring_list); | |
3677 | INIT_LIST_HEAD(&obj->exec_list); | |
3678 | ||
37e680a1 CW |
3679 | obj->ops = ops; |
3680 | ||
0327d6ba CW |
3681 | obj->fence_reg = I915_FENCE_REG_NONE; |
3682 | obj->madv = I915_MADV_WILLNEED; | |
3683 | /* Avoid an unnecessary call to unbind on the first bind. */ | |
3684 | obj->map_and_fenceable = true; | |
3685 | ||
3686 | i915_gem_info_add_obj(obj->base.dev->dev_private, obj->base.size); | |
3687 | } | |
3688 | ||
37e680a1 CW |
3689 | static const struct drm_i915_gem_object_ops i915_gem_object_ops = { |
3690 | .get_pages = i915_gem_object_get_pages_gtt, | |
3691 | .put_pages = i915_gem_object_put_pages_gtt, | |
3692 | }; | |
3693 | ||
05394f39 CW |
3694 | struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev, |
3695 | size_t size) | |
ac52bc56 | 3696 | { |
c397b908 | 3697 | struct drm_i915_gem_object *obj; |
5949eac4 | 3698 | struct address_space *mapping; |
bed1ea95 | 3699 | u32 mask; |
ac52bc56 | 3700 | |
c397b908 DV |
3701 | obj = kzalloc(sizeof(*obj), GFP_KERNEL); |
3702 | if (obj == NULL) | |
3703 | return NULL; | |
673a394b | 3704 | |
c397b908 DV |
3705 | if (drm_gem_object_init(dev, &obj->base, size) != 0) { |
3706 | kfree(obj); | |
3707 | return NULL; | |
3708 | } | |
673a394b | 3709 | |
bed1ea95 CW |
3710 | mask = GFP_HIGHUSER | __GFP_RECLAIMABLE; |
3711 | if (IS_CRESTLINE(dev) || IS_BROADWATER(dev)) { | |
3712 | /* 965gm cannot relocate objects above 4GiB. */ | |
3713 | mask &= ~__GFP_HIGHMEM; | |
3714 | mask |= __GFP_DMA32; | |
3715 | } | |
3716 | ||
5949eac4 | 3717 | mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; |
bed1ea95 | 3718 | mapping_set_gfp_mask(mapping, mask); |
5949eac4 | 3719 | |
37e680a1 | 3720 | i915_gem_object_init(obj, &i915_gem_object_ops); |
73aa808f | 3721 | |
c397b908 DV |
3722 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
3723 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; | |
673a394b | 3724 | |
3d29b842 ED |
3725 | if (HAS_LLC(dev)) { |
3726 | /* On some devices, we can have the GPU use the LLC (the CPU | |
a1871112 EA |
3727 | * cache) for about a 10% performance improvement |
3728 | * compared to uncached. Graphics requests other than | |
3729 | * display scanout are coherent with the CPU in | |
3730 | * accessing this cache. This means in this mode we | |
3731 | * don't need to clflush on the CPU side, and on the | |
3732 | * GPU side we only need to flush internal caches to | |
3733 | * get data visible to the CPU. | |
3734 | * | |
3735 | * However, we maintain the display planes as UC, and so | |
3736 | * need to rebind when first used as such. | |
3737 | */ | |
3738 | obj->cache_level = I915_CACHE_LLC; | |
3739 | } else | |
3740 | obj->cache_level = I915_CACHE_NONE; | |
3741 | ||
05394f39 | 3742 | return obj; |
c397b908 DV |
3743 | } |
3744 | ||
3745 | int i915_gem_init_object(struct drm_gem_object *obj) | |
3746 | { | |
3747 | BUG(); | |
de151cf6 | 3748 | |
673a394b EA |
3749 | return 0; |
3750 | } | |
3751 | ||
1488fc08 | 3752 | void i915_gem_free_object(struct drm_gem_object *gem_obj) |
673a394b | 3753 | { |
1488fc08 | 3754 | struct drm_i915_gem_object *obj = to_intel_bo(gem_obj); |
05394f39 | 3755 | struct drm_device *dev = obj->base.dev; |
be72615b | 3756 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b | 3757 | |
26e12f89 CW |
3758 | trace_i915_gem_object_destroy(obj); |
3759 | ||
1488fc08 CW |
3760 | if (obj->phys_obj) |
3761 | i915_gem_detach_phys_object(dev, obj); | |
3762 | ||
3763 | obj->pin_count = 0; | |
3764 | if (WARN_ON(i915_gem_object_unbind(obj) == -ERESTARTSYS)) { | |
3765 | bool was_interruptible; | |
3766 | ||
3767 | was_interruptible = dev_priv->mm.interruptible; | |
3768 | dev_priv->mm.interruptible = false; | |
3769 | ||
3770 | WARN_ON(i915_gem_object_unbind(obj)); | |
3771 | ||
3772 | dev_priv->mm.interruptible = was_interruptible; | |
3773 | } | |
3774 | ||
a5570178 | 3775 | obj->pages_pin_count = 0; |
37e680a1 | 3776 | i915_gem_object_put_pages(obj); |
d8cb5086 | 3777 | i915_gem_object_free_mmap_offset(obj); |
de151cf6 | 3778 | |
9da3da66 CW |
3779 | BUG_ON(obj->pages); |
3780 | ||
2f745ad3 CW |
3781 | if (obj->base.import_attach) |
3782 | drm_prime_gem_destroy(&obj->base, NULL); | |
de151cf6 | 3783 | |
05394f39 CW |
3784 | drm_gem_object_release(&obj->base); |
3785 | i915_gem_info_remove_obj(dev_priv, obj->base.size); | |
c397b908 | 3786 | |
05394f39 CW |
3787 | kfree(obj->bit_17); |
3788 | kfree(obj); | |
673a394b EA |
3789 | } |
3790 | ||
29105ccc CW |
3791 | int |
3792 | i915_gem_idle(struct drm_device *dev) | |
3793 | { | |
3794 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3795 | int ret; | |
28dfe52a | 3796 | |
29105ccc | 3797 | mutex_lock(&dev->struct_mutex); |
1c5d22f7 | 3798 | |
87acb0a5 | 3799 | if (dev_priv->mm.suspended) { |
29105ccc CW |
3800 | mutex_unlock(&dev->struct_mutex); |
3801 | return 0; | |
28dfe52a EA |
3802 | } |
3803 | ||
b2da9fe5 | 3804 | ret = i915_gpu_idle(dev); |
6dbe2772 KP |
3805 | if (ret) { |
3806 | mutex_unlock(&dev->struct_mutex); | |
673a394b | 3807 | return ret; |
6dbe2772 | 3808 | } |
b2da9fe5 | 3809 | i915_gem_retire_requests(dev); |
673a394b | 3810 | |
29105ccc | 3811 | /* Under UMS, be paranoid and evict. */ |
a39d7efc | 3812 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
6c085a72 | 3813 | i915_gem_evict_everything(dev); |
29105ccc | 3814 | |
312817a3 CW |
3815 | i915_gem_reset_fences(dev); |
3816 | ||
29105ccc CW |
3817 | /* Hack! Don't let anybody do execbuf while we don't control the chip. |
3818 | * We need to replace this with a semaphore, or something. | |
3819 | * And not confound mm.suspended! | |
3820 | */ | |
3821 | dev_priv->mm.suspended = 1; | |
bc0c7f14 | 3822 | del_timer_sync(&dev_priv->hangcheck_timer); |
29105ccc CW |
3823 | |
3824 | i915_kernel_lost_context(dev); | |
6dbe2772 | 3825 | i915_gem_cleanup_ringbuffer(dev); |
29105ccc | 3826 | |
6dbe2772 KP |
3827 | mutex_unlock(&dev->struct_mutex); |
3828 | ||
29105ccc CW |
3829 | /* Cancel the retire work handler, which should be idle now. */ |
3830 | cancel_delayed_work_sync(&dev_priv->mm.retire_work); | |
3831 | ||
673a394b EA |
3832 | return 0; |
3833 | } | |
3834 | ||
b9524a1e BW |
3835 | void i915_gem_l3_remap(struct drm_device *dev) |
3836 | { | |
3837 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3838 | u32 misccpctl; | |
3839 | int i; | |
3840 | ||
3841 | if (!IS_IVYBRIDGE(dev)) | |
3842 | return; | |
3843 | ||
a4da4fa4 | 3844 | if (!dev_priv->l3_parity.remap_info) |
b9524a1e BW |
3845 | return; |
3846 | ||
3847 | misccpctl = I915_READ(GEN7_MISCCPCTL); | |
3848 | I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE); | |
3849 | POSTING_READ(GEN7_MISCCPCTL); | |
3850 | ||
3851 | for (i = 0; i < GEN7_L3LOG_SIZE; i += 4) { | |
3852 | u32 remap = I915_READ(GEN7_L3LOG_BASE + i); | |
a4da4fa4 | 3853 | if (remap && remap != dev_priv->l3_parity.remap_info[i/4]) |
b9524a1e BW |
3854 | DRM_DEBUG("0x%x was already programmed to %x\n", |
3855 | GEN7_L3LOG_BASE + i, remap); | |
a4da4fa4 | 3856 | if (remap && !dev_priv->l3_parity.remap_info[i/4]) |
b9524a1e | 3857 | DRM_DEBUG_DRIVER("Clearing remapped register\n"); |
a4da4fa4 | 3858 | I915_WRITE(GEN7_L3LOG_BASE + i, dev_priv->l3_parity.remap_info[i/4]); |
b9524a1e BW |
3859 | } |
3860 | ||
3861 | /* Make sure all the writes land before disabling dop clock gating */ | |
3862 | POSTING_READ(GEN7_L3LOG_BASE); | |
3863 | ||
3864 | I915_WRITE(GEN7_MISCCPCTL, misccpctl); | |
3865 | } | |
3866 | ||
f691e2f4 DV |
3867 | void i915_gem_init_swizzling(struct drm_device *dev) |
3868 | { | |
3869 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3870 | ||
11782b02 | 3871 | if (INTEL_INFO(dev)->gen < 5 || |
f691e2f4 DV |
3872 | dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE) |
3873 | return; | |
3874 | ||
3875 | I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) | | |
3876 | DISP_TILE_SURFACE_SWIZZLING); | |
3877 | ||
11782b02 DV |
3878 | if (IS_GEN5(dev)) |
3879 | return; | |
3880 | ||
f691e2f4 DV |
3881 | I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL); |
3882 | if (IS_GEN6(dev)) | |
6b26c86d | 3883 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB)); |
f691e2f4 | 3884 | else |
6b26c86d | 3885 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB)); |
f691e2f4 | 3886 | } |
e21af88d | 3887 | |
67b1b571 CW |
3888 | static bool |
3889 | intel_enable_blt(struct drm_device *dev) | |
3890 | { | |
3891 | if (!HAS_BLT(dev)) | |
3892 | return false; | |
3893 | ||
3894 | /* The blitter was dysfunctional on early prototypes */ | |
3895 | if (IS_GEN6(dev) && dev->pdev->revision < 8) { | |
3896 | DRM_INFO("BLT not supported on this pre-production hardware;" | |
3897 | " graphics performance will be degraded.\n"); | |
3898 | return false; | |
3899 | } | |
3900 | ||
3901 | return true; | |
3902 | } | |
3903 | ||
8187a2b7 | 3904 | int |
f691e2f4 | 3905 | i915_gem_init_hw(struct drm_device *dev) |
8187a2b7 ZN |
3906 | { |
3907 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3908 | int ret; | |
68f95ba9 | 3909 | |
e76e9aeb | 3910 | if (INTEL_INFO(dev)->gen < 6 && !intel_enable_gtt()) |
8ecd1a66 DV |
3911 | return -EIO; |
3912 | ||
eda2d7f5 RV |
3913 | if (IS_HASWELL(dev) && (I915_READ(0x120010) == 1)) |
3914 | I915_WRITE(0x9008, I915_READ(0x9008) | 0xf0000); | |
3915 | ||
b9524a1e BW |
3916 | i915_gem_l3_remap(dev); |
3917 | ||
f691e2f4 DV |
3918 | i915_gem_init_swizzling(dev); |
3919 | ||
5c1143bb | 3920 | ret = intel_init_render_ring_buffer(dev); |
68f95ba9 | 3921 | if (ret) |
b6913e4b | 3922 | return ret; |
68f95ba9 CW |
3923 | |
3924 | if (HAS_BSD(dev)) { | |
5c1143bb | 3925 | ret = intel_init_bsd_ring_buffer(dev); |
68f95ba9 CW |
3926 | if (ret) |
3927 | goto cleanup_render_ring; | |
d1b851fc | 3928 | } |
68f95ba9 | 3929 | |
67b1b571 | 3930 | if (intel_enable_blt(dev)) { |
549f7365 CW |
3931 | ret = intel_init_blt_ring_buffer(dev); |
3932 | if (ret) | |
3933 | goto cleanup_bsd_ring; | |
3934 | } | |
3935 | ||
6f392d54 CW |
3936 | dev_priv->next_seqno = 1; |
3937 | ||
254f965c BW |
3938 | /* |
3939 | * XXX: There was some w/a described somewhere suggesting loading | |
3940 | * contexts before PPGTT. | |
3941 | */ | |
3942 | i915_gem_context_init(dev); | |
e21af88d DV |
3943 | i915_gem_init_ppgtt(dev); |
3944 | ||
68f95ba9 CW |
3945 | return 0; |
3946 | ||
549f7365 | 3947 | cleanup_bsd_ring: |
1ec14ad3 | 3948 | intel_cleanup_ring_buffer(&dev_priv->ring[VCS]); |
68f95ba9 | 3949 | cleanup_render_ring: |
1ec14ad3 | 3950 | intel_cleanup_ring_buffer(&dev_priv->ring[RCS]); |
8187a2b7 ZN |
3951 | return ret; |
3952 | } | |
3953 | ||
1070a42b CW |
3954 | static bool |
3955 | intel_enable_ppgtt(struct drm_device *dev) | |
3956 | { | |
3957 | if (i915_enable_ppgtt >= 0) | |
3958 | return i915_enable_ppgtt; | |
3959 | ||
3960 | #ifdef CONFIG_INTEL_IOMMU | |
3961 | /* Disable ppgtt on SNB if VT-d is on. */ | |
3962 | if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped) | |
3963 | return false; | |
3964 | #endif | |
3965 | ||
3966 | return true; | |
3967 | } | |
3968 | ||
3969 | int i915_gem_init(struct drm_device *dev) | |
3970 | { | |
3971 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3972 | unsigned long gtt_size, mappable_size; | |
3973 | int ret; | |
3974 | ||
3975 | gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT; | |
3976 | mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT; | |
3977 | ||
3978 | mutex_lock(&dev->struct_mutex); | |
3979 | if (intel_enable_ppgtt(dev) && HAS_ALIASING_PPGTT(dev)) { | |
3980 | /* PPGTT pdes are stolen from global gtt ptes, so shrink the | |
3981 | * aperture accordingly when using aliasing ppgtt. */ | |
3982 | gtt_size -= I915_PPGTT_PD_ENTRIES*PAGE_SIZE; | |
3983 | ||
3984 | i915_gem_init_global_gtt(dev, 0, mappable_size, gtt_size); | |
3985 | ||
3986 | ret = i915_gem_init_aliasing_ppgtt(dev); | |
3987 | if (ret) { | |
3988 | mutex_unlock(&dev->struct_mutex); | |
3989 | return ret; | |
3990 | } | |
3991 | } else { | |
3992 | /* Let GEM Manage all of the aperture. | |
3993 | * | |
3994 | * However, leave one page at the end still bound to the scratch | |
3995 | * page. There are a number of places where the hardware | |
3996 | * apparently prefetches past the end of the object, and we've | |
3997 | * seen multiple hangs with the GPU head pointer stuck in a | |
3998 | * batchbuffer bound at the last page of the aperture. One page | |
3999 | * should be enough to keep any prefetching inside of the | |
4000 | * aperture. | |
4001 | */ | |
4002 | i915_gem_init_global_gtt(dev, 0, mappable_size, | |
4003 | gtt_size); | |
4004 | } | |
4005 | ||
4006 | ret = i915_gem_init_hw(dev); | |
4007 | mutex_unlock(&dev->struct_mutex); | |
4008 | if (ret) { | |
4009 | i915_gem_cleanup_aliasing_ppgtt(dev); | |
4010 | return ret; | |
4011 | } | |
4012 | ||
53ca26ca DV |
4013 | /* Allow hardware batchbuffers unless told otherwise, but not for KMS. */ |
4014 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
4015 | dev_priv->dri1.allow_batchbuffer = 1; | |
1070a42b CW |
4016 | return 0; |
4017 | } | |
4018 | ||
8187a2b7 ZN |
4019 | void |
4020 | i915_gem_cleanup_ringbuffer(struct drm_device *dev) | |
4021 | { | |
4022 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b4519513 | 4023 | struct intel_ring_buffer *ring; |
1ec14ad3 | 4024 | int i; |
8187a2b7 | 4025 | |
b4519513 CW |
4026 | for_each_ring(ring, dev_priv, i) |
4027 | intel_cleanup_ring_buffer(ring); | |
8187a2b7 ZN |
4028 | } |
4029 | ||
673a394b EA |
4030 | int |
4031 | i915_gem_entervt_ioctl(struct drm_device *dev, void *data, | |
4032 | struct drm_file *file_priv) | |
4033 | { | |
4034 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b4519513 | 4035 | int ret; |
673a394b | 4036 | |
79e53945 JB |
4037 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4038 | return 0; | |
4039 | ||
ba1234d1 | 4040 | if (atomic_read(&dev_priv->mm.wedged)) { |
673a394b | 4041 | DRM_ERROR("Reenabling wedged hardware, good luck\n"); |
ba1234d1 | 4042 | atomic_set(&dev_priv->mm.wedged, 0); |
673a394b EA |
4043 | } |
4044 | ||
673a394b | 4045 | mutex_lock(&dev->struct_mutex); |
9bb2d6f9 EA |
4046 | dev_priv->mm.suspended = 0; |
4047 | ||
f691e2f4 | 4048 | ret = i915_gem_init_hw(dev); |
d816f6ac WF |
4049 | if (ret != 0) { |
4050 | mutex_unlock(&dev->struct_mutex); | |
9bb2d6f9 | 4051 | return ret; |
d816f6ac | 4052 | } |
9bb2d6f9 | 4053 | |
69dc4987 | 4054 | BUG_ON(!list_empty(&dev_priv->mm.active_list)); |
673a394b | 4055 | mutex_unlock(&dev->struct_mutex); |
dbb19d30 | 4056 | |
5f35308b CW |
4057 | ret = drm_irq_install(dev); |
4058 | if (ret) | |
4059 | goto cleanup_ringbuffer; | |
dbb19d30 | 4060 | |
673a394b | 4061 | return 0; |
5f35308b CW |
4062 | |
4063 | cleanup_ringbuffer: | |
4064 | mutex_lock(&dev->struct_mutex); | |
4065 | i915_gem_cleanup_ringbuffer(dev); | |
4066 | dev_priv->mm.suspended = 1; | |
4067 | mutex_unlock(&dev->struct_mutex); | |
4068 | ||
4069 | return ret; | |
673a394b EA |
4070 | } |
4071 | ||
4072 | int | |
4073 | i915_gem_leavevt_ioctl(struct drm_device *dev, void *data, | |
4074 | struct drm_file *file_priv) | |
4075 | { | |
79e53945 JB |
4076 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4077 | return 0; | |
4078 | ||
dbb19d30 | 4079 | drm_irq_uninstall(dev); |
e6890f6f | 4080 | return i915_gem_idle(dev); |
673a394b EA |
4081 | } |
4082 | ||
4083 | void | |
4084 | i915_gem_lastclose(struct drm_device *dev) | |
4085 | { | |
4086 | int ret; | |
673a394b | 4087 | |
e806b495 EA |
4088 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4089 | return; | |
4090 | ||
6dbe2772 KP |
4091 | ret = i915_gem_idle(dev); |
4092 | if (ret) | |
4093 | DRM_ERROR("failed to idle hardware: %d\n", ret); | |
673a394b EA |
4094 | } |
4095 | ||
64193406 CW |
4096 | static void |
4097 | init_ring_lists(struct intel_ring_buffer *ring) | |
4098 | { | |
4099 | INIT_LIST_HEAD(&ring->active_list); | |
4100 | INIT_LIST_HEAD(&ring->request_list); | |
64193406 CW |
4101 | } |
4102 | ||
673a394b EA |
4103 | void |
4104 | i915_gem_load(struct drm_device *dev) | |
4105 | { | |
b5aa8a0f | 4106 | int i; |
673a394b EA |
4107 | drm_i915_private_t *dev_priv = dev->dev_private; |
4108 | ||
69dc4987 | 4109 | INIT_LIST_HEAD(&dev_priv->mm.active_list); |
673a394b | 4110 | INIT_LIST_HEAD(&dev_priv->mm.inactive_list); |
6c085a72 CW |
4111 | INIT_LIST_HEAD(&dev_priv->mm.unbound_list); |
4112 | INIT_LIST_HEAD(&dev_priv->mm.bound_list); | |
a09ba7fa | 4113 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
1ec14ad3 CW |
4114 | for (i = 0; i < I915_NUM_RINGS; i++) |
4115 | init_ring_lists(&dev_priv->ring[i]); | |
4b9de737 | 4116 | for (i = 0; i < I915_MAX_NUM_FENCES; i++) |
007cc8ac | 4117 | INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list); |
673a394b EA |
4118 | INIT_DELAYED_WORK(&dev_priv->mm.retire_work, |
4119 | i915_gem_retire_work_handler); | |
30dbf0c0 | 4120 | init_completion(&dev_priv->error_completion); |
31169714 | 4121 | |
94400120 DA |
4122 | /* On GEN3 we really need to make sure the ARB C3 LP bit is set */ |
4123 | if (IS_GEN3(dev)) { | |
50743298 DV |
4124 | I915_WRITE(MI_ARB_STATE, |
4125 | _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE)); | |
94400120 DA |
4126 | } |
4127 | ||
72bfa19c CW |
4128 | dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL; |
4129 | ||
de151cf6 | 4130 | /* Old X drivers will take 0-2 for front, back, depth buffers */ |
b397c836 EA |
4131 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
4132 | dev_priv->fence_reg_start = 3; | |
de151cf6 | 4133 | |
a6c45cf0 | 4134 | if (INTEL_INFO(dev)->gen >= 4 || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) |
de151cf6 JB |
4135 | dev_priv->num_fence_regs = 16; |
4136 | else | |
4137 | dev_priv->num_fence_regs = 8; | |
4138 | ||
b5aa8a0f | 4139 | /* Initialize fence registers to zero */ |
ada726c7 | 4140 | i915_gem_reset_fences(dev); |
10ed13e4 | 4141 | |
673a394b | 4142 | i915_gem_detect_bit_6_swizzle(dev); |
6b95a207 | 4143 | init_waitqueue_head(&dev_priv->pending_flip_queue); |
17250b71 | 4144 | |
ce453d81 CW |
4145 | dev_priv->mm.interruptible = true; |
4146 | ||
17250b71 CW |
4147 | dev_priv->mm.inactive_shrinker.shrink = i915_gem_inactive_shrink; |
4148 | dev_priv->mm.inactive_shrinker.seeks = DEFAULT_SEEKS; | |
4149 | register_shrinker(&dev_priv->mm.inactive_shrinker); | |
673a394b | 4150 | } |
71acb5eb DA |
4151 | |
4152 | /* | |
4153 | * Create a physically contiguous memory object for this object | |
4154 | * e.g. for cursor + overlay regs | |
4155 | */ | |
995b6762 CW |
4156 | static int i915_gem_init_phys_object(struct drm_device *dev, |
4157 | int id, int size, int align) | |
71acb5eb DA |
4158 | { |
4159 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4160 | struct drm_i915_gem_phys_object *phys_obj; | |
4161 | int ret; | |
4162 | ||
4163 | if (dev_priv->mm.phys_objs[id - 1] || !size) | |
4164 | return 0; | |
4165 | ||
9a298b2a | 4166 | phys_obj = kzalloc(sizeof(struct drm_i915_gem_phys_object), GFP_KERNEL); |
71acb5eb DA |
4167 | if (!phys_obj) |
4168 | return -ENOMEM; | |
4169 | ||
4170 | phys_obj->id = id; | |
4171 | ||
6eeefaf3 | 4172 | phys_obj->handle = drm_pci_alloc(dev, size, align); |
71acb5eb DA |
4173 | if (!phys_obj->handle) { |
4174 | ret = -ENOMEM; | |
4175 | goto kfree_obj; | |
4176 | } | |
4177 | #ifdef CONFIG_X86 | |
4178 | set_memory_wc((unsigned long)phys_obj->handle->vaddr, phys_obj->handle->size / PAGE_SIZE); | |
4179 | #endif | |
4180 | ||
4181 | dev_priv->mm.phys_objs[id - 1] = phys_obj; | |
4182 | ||
4183 | return 0; | |
4184 | kfree_obj: | |
9a298b2a | 4185 | kfree(phys_obj); |
71acb5eb DA |
4186 | return ret; |
4187 | } | |
4188 | ||
995b6762 | 4189 | static void i915_gem_free_phys_object(struct drm_device *dev, int id) |
71acb5eb DA |
4190 | { |
4191 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4192 | struct drm_i915_gem_phys_object *phys_obj; | |
4193 | ||
4194 | if (!dev_priv->mm.phys_objs[id - 1]) | |
4195 | return; | |
4196 | ||
4197 | phys_obj = dev_priv->mm.phys_objs[id - 1]; | |
4198 | if (phys_obj->cur_obj) { | |
4199 | i915_gem_detach_phys_object(dev, phys_obj->cur_obj); | |
4200 | } | |
4201 | ||
4202 | #ifdef CONFIG_X86 | |
4203 | set_memory_wb((unsigned long)phys_obj->handle->vaddr, phys_obj->handle->size / PAGE_SIZE); | |
4204 | #endif | |
4205 | drm_pci_free(dev, phys_obj->handle); | |
4206 | kfree(phys_obj); | |
4207 | dev_priv->mm.phys_objs[id - 1] = NULL; | |
4208 | } | |
4209 | ||
4210 | void i915_gem_free_all_phys_object(struct drm_device *dev) | |
4211 | { | |
4212 | int i; | |
4213 | ||
260883c8 | 4214 | for (i = I915_GEM_PHYS_CURSOR_0; i <= I915_MAX_PHYS_OBJECT; i++) |
71acb5eb DA |
4215 | i915_gem_free_phys_object(dev, i); |
4216 | } | |
4217 | ||
4218 | void i915_gem_detach_phys_object(struct drm_device *dev, | |
05394f39 | 4219 | struct drm_i915_gem_object *obj) |
71acb5eb | 4220 | { |
05394f39 | 4221 | struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; |
e5281ccd | 4222 | char *vaddr; |
71acb5eb | 4223 | int i; |
71acb5eb DA |
4224 | int page_count; |
4225 | ||
05394f39 | 4226 | if (!obj->phys_obj) |
71acb5eb | 4227 | return; |
05394f39 | 4228 | vaddr = obj->phys_obj->handle->vaddr; |
71acb5eb | 4229 | |
05394f39 | 4230 | page_count = obj->base.size / PAGE_SIZE; |
71acb5eb | 4231 | for (i = 0; i < page_count; i++) { |
5949eac4 | 4232 | struct page *page = shmem_read_mapping_page(mapping, i); |
e5281ccd CW |
4233 | if (!IS_ERR(page)) { |
4234 | char *dst = kmap_atomic(page); | |
4235 | memcpy(dst, vaddr + i*PAGE_SIZE, PAGE_SIZE); | |
4236 | kunmap_atomic(dst); | |
4237 | ||
4238 | drm_clflush_pages(&page, 1); | |
4239 | ||
4240 | set_page_dirty(page); | |
4241 | mark_page_accessed(page); | |
4242 | page_cache_release(page); | |
4243 | } | |
71acb5eb | 4244 | } |
e76e9aeb | 4245 | i915_gem_chipset_flush(dev); |
d78b47b9 | 4246 | |
05394f39 CW |
4247 | obj->phys_obj->cur_obj = NULL; |
4248 | obj->phys_obj = NULL; | |
71acb5eb DA |
4249 | } |
4250 | ||
4251 | int | |
4252 | i915_gem_attach_phys_object(struct drm_device *dev, | |
05394f39 | 4253 | struct drm_i915_gem_object *obj, |
6eeefaf3 CW |
4254 | int id, |
4255 | int align) | |
71acb5eb | 4256 | { |
05394f39 | 4257 | struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; |
71acb5eb | 4258 | drm_i915_private_t *dev_priv = dev->dev_private; |
71acb5eb DA |
4259 | int ret = 0; |
4260 | int page_count; | |
4261 | int i; | |
4262 | ||
4263 | if (id > I915_MAX_PHYS_OBJECT) | |
4264 | return -EINVAL; | |
4265 | ||
05394f39 CW |
4266 | if (obj->phys_obj) { |
4267 | if (obj->phys_obj->id == id) | |
71acb5eb DA |
4268 | return 0; |
4269 | i915_gem_detach_phys_object(dev, obj); | |
4270 | } | |
4271 | ||
71acb5eb DA |
4272 | /* create a new object */ |
4273 | if (!dev_priv->mm.phys_objs[id - 1]) { | |
4274 | ret = i915_gem_init_phys_object(dev, id, | |
05394f39 | 4275 | obj->base.size, align); |
71acb5eb | 4276 | if (ret) { |
05394f39 CW |
4277 | DRM_ERROR("failed to init phys object %d size: %zu\n", |
4278 | id, obj->base.size); | |
e5281ccd | 4279 | return ret; |
71acb5eb DA |
4280 | } |
4281 | } | |
4282 | ||
4283 | /* bind to the object */ | |
05394f39 CW |
4284 | obj->phys_obj = dev_priv->mm.phys_objs[id - 1]; |
4285 | obj->phys_obj->cur_obj = obj; | |
71acb5eb | 4286 | |
05394f39 | 4287 | page_count = obj->base.size / PAGE_SIZE; |
71acb5eb DA |
4288 | |
4289 | for (i = 0; i < page_count; i++) { | |
e5281ccd CW |
4290 | struct page *page; |
4291 | char *dst, *src; | |
4292 | ||
5949eac4 | 4293 | page = shmem_read_mapping_page(mapping, i); |
e5281ccd CW |
4294 | if (IS_ERR(page)) |
4295 | return PTR_ERR(page); | |
71acb5eb | 4296 | |
ff75b9bc | 4297 | src = kmap_atomic(page); |
05394f39 | 4298 | dst = obj->phys_obj->handle->vaddr + (i * PAGE_SIZE); |
71acb5eb | 4299 | memcpy(dst, src, PAGE_SIZE); |
3e4d3af5 | 4300 | kunmap_atomic(src); |
71acb5eb | 4301 | |
e5281ccd CW |
4302 | mark_page_accessed(page); |
4303 | page_cache_release(page); | |
4304 | } | |
d78b47b9 | 4305 | |
71acb5eb | 4306 | return 0; |
71acb5eb DA |
4307 | } |
4308 | ||
4309 | static int | |
05394f39 CW |
4310 | i915_gem_phys_pwrite(struct drm_device *dev, |
4311 | struct drm_i915_gem_object *obj, | |
71acb5eb DA |
4312 | struct drm_i915_gem_pwrite *args, |
4313 | struct drm_file *file_priv) | |
4314 | { | |
05394f39 | 4315 | void *vaddr = obj->phys_obj->handle->vaddr + args->offset; |
b47b30cc | 4316 | char __user *user_data = (char __user *) (uintptr_t) args->data_ptr; |
71acb5eb | 4317 | |
b47b30cc CW |
4318 | if (__copy_from_user_inatomic_nocache(vaddr, user_data, args->size)) { |
4319 | unsigned long unwritten; | |
4320 | ||
4321 | /* The physical object once assigned is fixed for the lifetime | |
4322 | * of the obj, so we can safely drop the lock and continue | |
4323 | * to access vaddr. | |
4324 | */ | |
4325 | mutex_unlock(&dev->struct_mutex); | |
4326 | unwritten = copy_from_user(vaddr, user_data, args->size); | |
4327 | mutex_lock(&dev->struct_mutex); | |
4328 | if (unwritten) | |
4329 | return -EFAULT; | |
4330 | } | |
71acb5eb | 4331 | |
e76e9aeb | 4332 | i915_gem_chipset_flush(dev); |
71acb5eb DA |
4333 | return 0; |
4334 | } | |
b962442e | 4335 | |
f787a5f5 | 4336 | void i915_gem_release(struct drm_device *dev, struct drm_file *file) |
b962442e | 4337 | { |
f787a5f5 | 4338 | struct drm_i915_file_private *file_priv = file->driver_priv; |
b962442e EA |
4339 | |
4340 | /* Clean up our request list when the client is going away, so that | |
4341 | * later retire_requests won't dereference our soon-to-be-gone | |
4342 | * file_priv. | |
4343 | */ | |
1c25595f | 4344 | spin_lock(&file_priv->mm.lock); |
f787a5f5 CW |
4345 | while (!list_empty(&file_priv->mm.request_list)) { |
4346 | struct drm_i915_gem_request *request; | |
4347 | ||
4348 | request = list_first_entry(&file_priv->mm.request_list, | |
4349 | struct drm_i915_gem_request, | |
4350 | client_list); | |
4351 | list_del(&request->client_list); | |
4352 | request->file_priv = NULL; | |
4353 | } | |
1c25595f | 4354 | spin_unlock(&file_priv->mm.lock); |
b962442e | 4355 | } |
31169714 | 4356 | |
31169714 | 4357 | static int |
1495f230 | 4358 | i915_gem_inactive_shrink(struct shrinker *shrinker, struct shrink_control *sc) |
31169714 | 4359 | { |
17250b71 CW |
4360 | struct drm_i915_private *dev_priv = |
4361 | container_of(shrinker, | |
4362 | struct drm_i915_private, | |
4363 | mm.inactive_shrinker); | |
4364 | struct drm_device *dev = dev_priv->dev; | |
6c085a72 | 4365 | struct drm_i915_gem_object *obj; |
1495f230 | 4366 | int nr_to_scan = sc->nr_to_scan; |
17250b71 CW |
4367 | int cnt; |
4368 | ||
4369 | if (!mutex_trylock(&dev->struct_mutex)) | |
bbe2e11a | 4370 | return 0; |
31169714 | 4371 | |
6c085a72 CW |
4372 | if (nr_to_scan) { |
4373 | nr_to_scan -= i915_gem_purge(dev_priv, nr_to_scan); | |
4374 | if (nr_to_scan > 0) | |
4375 | i915_gem_shrink_all(dev_priv); | |
31169714 CW |
4376 | } |
4377 | ||
17250b71 | 4378 | cnt = 0; |
6c085a72 | 4379 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, gtt_list) |
a5570178 CW |
4380 | if (obj->pages_pin_count == 0) |
4381 | cnt += obj->base.size >> PAGE_SHIFT; | |
6c085a72 | 4382 | list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list) |
a5570178 | 4383 | if (obj->pin_count == 0 && obj->pages_pin_count == 0) |
6c085a72 | 4384 | cnt += obj->base.size >> PAGE_SHIFT; |
17250b71 | 4385 | |
17250b71 | 4386 | mutex_unlock(&dev->struct_mutex); |
6c085a72 | 4387 | return cnt; |
31169714 | 4388 | } |