]>
Commit | Line | Data |
---|---|---|
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 | ||
28 | #include "drmP.h" | |
29 | #include "drm.h" | |
30 | #include "i915_drm.h" | |
31 | #include "i915_drv.h" | |
1c5d22f7 | 32 | #include "i915_trace.h" |
652c393a | 33 | #include "intel_drv.h" |
5949eac4 | 34 | #include <linux/shmem_fs.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
673a394b | 36 | #include <linux/swap.h> |
79e53945 | 37 | #include <linux/pci.h> |
1286ff73 | 38 | #include <linux/dma-buf.h> |
673a394b | 39 | |
05394f39 CW |
40 | static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj); |
41 | static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj); | |
88241785 CW |
42 | static __must_check int i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, |
43 | unsigned alignment, | |
86a1ee26 CW |
44 | bool map_and_fenceable, |
45 | bool nonblocking); | |
05394f39 CW |
46 | static int i915_gem_phys_pwrite(struct drm_device *dev, |
47 | struct drm_i915_gem_object *obj, | |
71acb5eb | 48 | struct drm_i915_gem_pwrite *args, |
05394f39 | 49 | struct drm_file *file); |
673a394b | 50 | |
61050808 CW |
51 | static void i915_gem_write_fence(struct drm_device *dev, int reg, |
52 | struct drm_i915_gem_object *obj); | |
53 | static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, | |
54 | struct drm_i915_fence_reg *fence, | |
55 | bool enable); | |
56 | ||
17250b71 | 57 | static int i915_gem_inactive_shrink(struct shrinker *shrinker, |
1495f230 | 58 | struct shrink_control *sc); |
6c085a72 CW |
59 | static long i915_gem_purge(struct drm_i915_private *dev_priv, long target); |
60 | static void i915_gem_shrink_all(struct drm_i915_private *dev_priv); | |
8c59967c | 61 | static void i915_gem_object_truncate(struct drm_i915_gem_object *obj); |
31169714 | 62 | |
61050808 CW |
63 | static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj) |
64 | { | |
65 | if (obj->tiling_mode) | |
66 | i915_gem_release_mmap(obj); | |
67 | ||
68 | /* As we do not have an associated fence register, we will force | |
69 | * a tiling change if we ever need to acquire one. | |
70 | */ | |
5d82e3e6 | 71 | obj->fence_dirty = false; |
61050808 CW |
72 | obj->fence_reg = I915_FENCE_REG_NONE; |
73 | } | |
74 | ||
73aa808f CW |
75 | /* some bookkeeping */ |
76 | static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv, | |
77 | size_t size) | |
78 | { | |
79 | dev_priv->mm.object_count++; | |
80 | dev_priv->mm.object_memory += size; | |
81 | } | |
82 | ||
83 | static void i915_gem_info_remove_obj(struct drm_i915_private *dev_priv, | |
84 | size_t size) | |
85 | { | |
86 | dev_priv->mm.object_count--; | |
87 | dev_priv->mm.object_memory -= size; | |
88 | } | |
89 | ||
21dd3734 CW |
90 | static int |
91 | i915_gem_wait_for_error(struct drm_device *dev) | |
30dbf0c0 CW |
92 | { |
93 | struct drm_i915_private *dev_priv = dev->dev_private; | |
94 | struct completion *x = &dev_priv->error_completion; | |
95 | unsigned long flags; | |
96 | int ret; | |
97 | ||
98 | if (!atomic_read(&dev_priv->mm.wedged)) | |
99 | return 0; | |
100 | ||
0a6759c6 DV |
101 | /* |
102 | * Only wait 10 seconds for the gpu reset to complete to avoid hanging | |
103 | * userspace. If it takes that long something really bad is going on and | |
104 | * we should simply try to bail out and fail as gracefully as possible. | |
105 | */ | |
106 | ret = wait_for_completion_interruptible_timeout(x, 10*HZ); | |
107 | if (ret == 0) { | |
108 | DRM_ERROR("Timed out waiting for the gpu reset to complete\n"); | |
109 | return -EIO; | |
110 | } else if (ret < 0) { | |
30dbf0c0 | 111 | return ret; |
0a6759c6 | 112 | } |
30dbf0c0 | 113 | |
21dd3734 CW |
114 | if (atomic_read(&dev_priv->mm.wedged)) { |
115 | /* GPU is hung, bump the completion count to account for | |
116 | * the token we just consumed so that we never hit zero and | |
117 | * end up waiting upon a subsequent completion event that | |
118 | * will never happen. | |
119 | */ | |
120 | spin_lock_irqsave(&x->wait.lock, flags); | |
121 | x->done++; | |
122 | spin_unlock_irqrestore(&x->wait.lock, flags); | |
123 | } | |
124 | return 0; | |
30dbf0c0 CW |
125 | } |
126 | ||
54cf91dc | 127 | int i915_mutex_lock_interruptible(struct drm_device *dev) |
76c1dec1 | 128 | { |
76c1dec1 CW |
129 | int ret; |
130 | ||
21dd3734 | 131 | ret = i915_gem_wait_for_error(dev); |
76c1dec1 CW |
132 | if (ret) |
133 | return ret; | |
134 | ||
135 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
136 | if (ret) | |
137 | return ret; | |
138 | ||
23bc5982 | 139 | WARN_ON(i915_verify_lists(dev)); |
76c1dec1 CW |
140 | return 0; |
141 | } | |
30dbf0c0 | 142 | |
7d1c4804 | 143 | static inline bool |
05394f39 | 144 | i915_gem_object_is_inactive(struct drm_i915_gem_object *obj) |
7d1c4804 | 145 | { |
6c085a72 | 146 | return obj->gtt_space && !obj->active; |
7d1c4804 CW |
147 | } |
148 | ||
79e53945 JB |
149 | int |
150 | i915_gem_init_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 151 | struct drm_file *file) |
79e53945 JB |
152 | { |
153 | struct drm_i915_gem_init *args = data; | |
2021746e | 154 | |
7bb6fb8d DV |
155 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
156 | return -ENODEV; | |
157 | ||
2021746e CW |
158 | if (args->gtt_start >= args->gtt_end || |
159 | (args->gtt_end | args->gtt_start) & (PAGE_SIZE - 1)) | |
160 | return -EINVAL; | |
79e53945 | 161 | |
f534bc0b DV |
162 | /* GEM with user mode setting was never supported on ilk and later. */ |
163 | if (INTEL_INFO(dev)->gen >= 5) | |
164 | return -ENODEV; | |
165 | ||
79e53945 | 166 | mutex_lock(&dev->struct_mutex); |
644ec02b DV |
167 | i915_gem_init_global_gtt(dev, args->gtt_start, |
168 | args->gtt_end, args->gtt_end); | |
673a394b EA |
169 | mutex_unlock(&dev->struct_mutex); |
170 | ||
2021746e | 171 | return 0; |
673a394b EA |
172 | } |
173 | ||
5a125c3c EA |
174 | int |
175 | i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 176 | struct drm_file *file) |
5a125c3c | 177 | { |
73aa808f | 178 | struct drm_i915_private *dev_priv = dev->dev_private; |
5a125c3c | 179 | struct drm_i915_gem_get_aperture *args = data; |
6299f992 CW |
180 | struct drm_i915_gem_object *obj; |
181 | size_t pinned; | |
5a125c3c | 182 | |
6299f992 | 183 | pinned = 0; |
73aa808f | 184 | mutex_lock(&dev->struct_mutex); |
6c085a72 | 185 | list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list) |
1b50247a CW |
186 | if (obj->pin_count) |
187 | pinned += obj->gtt_space->size; | |
73aa808f | 188 | mutex_unlock(&dev->struct_mutex); |
5a125c3c | 189 | |
6299f992 | 190 | args->aper_size = dev_priv->mm.gtt_total; |
0206e353 | 191 | args->aper_available_size = args->aper_size - pinned; |
6299f992 | 192 | |
5a125c3c EA |
193 | return 0; |
194 | } | |
195 | ||
ff72145b DA |
196 | static int |
197 | i915_gem_create(struct drm_file *file, | |
198 | struct drm_device *dev, | |
199 | uint64_t size, | |
200 | uint32_t *handle_p) | |
673a394b | 201 | { |
05394f39 | 202 | struct drm_i915_gem_object *obj; |
a1a2d1d3 PP |
203 | int ret; |
204 | u32 handle; | |
673a394b | 205 | |
ff72145b | 206 | size = roundup(size, PAGE_SIZE); |
8ffc0246 CW |
207 | if (size == 0) |
208 | return -EINVAL; | |
673a394b EA |
209 | |
210 | /* Allocate the new object */ | |
ff72145b | 211 | obj = i915_gem_alloc_object(dev, size); |
673a394b EA |
212 | if (obj == NULL) |
213 | return -ENOMEM; | |
214 | ||
05394f39 | 215 | ret = drm_gem_handle_create(file, &obj->base, &handle); |
1dfd9754 | 216 | if (ret) { |
05394f39 CW |
217 | drm_gem_object_release(&obj->base); |
218 | i915_gem_info_remove_obj(dev->dev_private, obj->base.size); | |
202f2fef | 219 | kfree(obj); |
673a394b | 220 | return ret; |
1dfd9754 | 221 | } |
673a394b | 222 | |
202f2fef | 223 | /* drop reference from allocate - handle holds it now */ |
05394f39 | 224 | drm_gem_object_unreference(&obj->base); |
202f2fef CW |
225 | trace_i915_gem_object_create(obj); |
226 | ||
ff72145b | 227 | *handle_p = handle; |
673a394b EA |
228 | return 0; |
229 | } | |
230 | ||
ff72145b DA |
231 | int |
232 | i915_gem_dumb_create(struct drm_file *file, | |
233 | struct drm_device *dev, | |
234 | struct drm_mode_create_dumb *args) | |
235 | { | |
236 | /* have to work out size/pitch and return them */ | |
ed0291fd | 237 | args->pitch = ALIGN(args->width * ((args->bpp + 7) / 8), 64); |
ff72145b DA |
238 | args->size = args->pitch * args->height; |
239 | return i915_gem_create(file, dev, | |
240 | args->size, &args->handle); | |
241 | } | |
242 | ||
243 | int i915_gem_dumb_destroy(struct drm_file *file, | |
244 | struct drm_device *dev, | |
245 | uint32_t handle) | |
246 | { | |
247 | return drm_gem_handle_delete(file, handle); | |
248 | } | |
249 | ||
250 | /** | |
251 | * Creates a new mm object and returns a handle to it. | |
252 | */ | |
253 | int | |
254 | i915_gem_create_ioctl(struct drm_device *dev, void *data, | |
255 | struct drm_file *file) | |
256 | { | |
257 | struct drm_i915_gem_create *args = data; | |
63ed2cb2 | 258 | |
ff72145b DA |
259 | return i915_gem_create(file, dev, |
260 | args->size, &args->handle); | |
261 | } | |
262 | ||
05394f39 | 263 | static int i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj) |
280b713b | 264 | { |
05394f39 | 265 | drm_i915_private_t *dev_priv = obj->base.dev->dev_private; |
280b713b EA |
266 | |
267 | return dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 && | |
05394f39 | 268 | obj->tiling_mode != I915_TILING_NONE; |
280b713b EA |
269 | } |
270 | ||
8461d226 DV |
271 | static inline int |
272 | __copy_to_user_swizzled(char __user *cpu_vaddr, | |
273 | const char *gpu_vaddr, int gpu_offset, | |
274 | int length) | |
275 | { | |
276 | int ret, cpu_offset = 0; | |
277 | ||
278 | while (length > 0) { | |
279 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
280 | int this_length = min(cacheline_end - gpu_offset, length); | |
281 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
282 | ||
283 | ret = __copy_to_user(cpu_vaddr + cpu_offset, | |
284 | gpu_vaddr + swizzled_gpu_offset, | |
285 | this_length); | |
286 | if (ret) | |
287 | return ret + length; | |
288 | ||
289 | cpu_offset += this_length; | |
290 | gpu_offset += this_length; | |
291 | length -= this_length; | |
292 | } | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
8c59967c | 297 | static inline int |
4f0c7cfb BW |
298 | __copy_from_user_swizzled(char *gpu_vaddr, int gpu_offset, |
299 | const char __user *cpu_vaddr, | |
8c59967c DV |
300 | int length) |
301 | { | |
302 | int ret, cpu_offset = 0; | |
303 | ||
304 | while (length > 0) { | |
305 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
306 | int this_length = min(cacheline_end - gpu_offset, length); | |
307 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
308 | ||
309 | ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset, | |
310 | cpu_vaddr + cpu_offset, | |
311 | this_length); | |
312 | if (ret) | |
313 | return ret + length; | |
314 | ||
315 | cpu_offset += this_length; | |
316 | gpu_offset += this_length; | |
317 | length -= this_length; | |
318 | } | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
d174bd64 DV |
323 | /* Per-page copy function for the shmem pread fastpath. |
324 | * Flushes invalid cachelines before reading the target if | |
325 | * needs_clflush is set. */ | |
eb01459f | 326 | static int |
d174bd64 DV |
327 | shmem_pread_fast(struct page *page, int shmem_page_offset, int page_length, |
328 | char __user *user_data, | |
329 | bool page_do_bit17_swizzling, bool needs_clflush) | |
330 | { | |
331 | char *vaddr; | |
332 | int ret; | |
333 | ||
e7e58eb5 | 334 | if (unlikely(page_do_bit17_swizzling)) |
d174bd64 DV |
335 | return -EINVAL; |
336 | ||
337 | vaddr = kmap_atomic(page); | |
338 | if (needs_clflush) | |
339 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
340 | page_length); | |
341 | ret = __copy_to_user_inatomic(user_data, | |
342 | vaddr + shmem_page_offset, | |
343 | page_length); | |
344 | kunmap_atomic(vaddr); | |
345 | ||
346 | return ret; | |
347 | } | |
348 | ||
23c18c71 DV |
349 | static void |
350 | shmem_clflush_swizzled_range(char *addr, unsigned long length, | |
351 | bool swizzled) | |
352 | { | |
e7e58eb5 | 353 | if (unlikely(swizzled)) { |
23c18c71 DV |
354 | unsigned long start = (unsigned long) addr; |
355 | unsigned long end = (unsigned long) addr + length; | |
356 | ||
357 | /* For swizzling simply ensure that we always flush both | |
358 | * channels. Lame, but simple and it works. Swizzled | |
359 | * pwrite/pread is far from a hotpath - current userspace | |
360 | * doesn't use it at all. */ | |
361 | start = round_down(start, 128); | |
362 | end = round_up(end, 128); | |
363 | ||
364 | drm_clflush_virt_range((void *)start, end - start); | |
365 | } else { | |
366 | drm_clflush_virt_range(addr, length); | |
367 | } | |
368 | ||
369 | } | |
370 | ||
d174bd64 DV |
371 | /* Only difference to the fast-path function is that this can handle bit17 |
372 | * and uses non-atomic copy and kmap functions. */ | |
373 | static int | |
374 | shmem_pread_slow(struct page *page, int shmem_page_offset, int page_length, | |
375 | char __user *user_data, | |
376 | bool page_do_bit17_swizzling, bool needs_clflush) | |
377 | { | |
378 | char *vaddr; | |
379 | int ret; | |
380 | ||
381 | vaddr = kmap(page); | |
382 | if (needs_clflush) | |
23c18c71 DV |
383 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
384 | page_length, | |
385 | page_do_bit17_swizzling); | |
d174bd64 DV |
386 | |
387 | if (page_do_bit17_swizzling) | |
388 | ret = __copy_to_user_swizzled(user_data, | |
389 | vaddr, shmem_page_offset, | |
390 | page_length); | |
391 | else | |
392 | ret = __copy_to_user(user_data, | |
393 | vaddr + shmem_page_offset, | |
394 | page_length); | |
395 | kunmap(page); | |
396 | ||
397 | return ret; | |
398 | } | |
399 | ||
eb01459f | 400 | static int |
dbf7bff0 DV |
401 | i915_gem_shmem_pread(struct drm_device *dev, |
402 | struct drm_i915_gem_object *obj, | |
403 | struct drm_i915_gem_pread *args, | |
404 | struct drm_file *file) | |
eb01459f | 405 | { |
05394f39 | 406 | struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; |
8461d226 | 407 | char __user *user_data; |
eb01459f | 408 | ssize_t remain; |
8461d226 | 409 | loff_t offset; |
eb2c0c81 | 410 | int shmem_page_offset, page_length, ret = 0; |
8461d226 | 411 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
dbf7bff0 | 412 | int hit_slowpath = 0; |
96d79b52 | 413 | int prefaulted = 0; |
8489731c | 414 | int needs_clflush = 0; |
692a576b | 415 | int release_page; |
eb01459f | 416 | |
8461d226 | 417 | user_data = (char __user *) (uintptr_t) args->data_ptr; |
eb01459f EA |
418 | remain = args->size; |
419 | ||
8461d226 | 420 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
eb01459f | 421 | |
8489731c DV |
422 | if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) { |
423 | /* If we're not in the cpu read domain, set ourself into the gtt | |
424 | * read domain and manually flush cachelines (if required). This | |
425 | * optimizes for the case when the gpu will dirty the data | |
426 | * anyway again before the next pread happens. */ | |
427 | if (obj->cache_level == I915_CACHE_NONE) | |
428 | needs_clflush = 1; | |
6c085a72 CW |
429 | if (obj->gtt_space) { |
430 | ret = i915_gem_object_set_to_gtt_domain(obj, false); | |
431 | if (ret) | |
432 | return ret; | |
433 | } | |
8489731c | 434 | } |
eb01459f | 435 | |
8461d226 | 436 | offset = args->offset; |
eb01459f EA |
437 | |
438 | while (remain > 0) { | |
e5281ccd CW |
439 | struct page *page; |
440 | ||
eb01459f EA |
441 | /* Operation in this page |
442 | * | |
eb01459f | 443 | * shmem_page_offset = offset within page in shmem file |
eb01459f EA |
444 | * page_length = bytes to copy for this page |
445 | */ | |
c8cbbb8b | 446 | shmem_page_offset = offset_in_page(offset); |
eb01459f EA |
447 | page_length = remain; |
448 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
449 | page_length = PAGE_SIZE - shmem_page_offset; | |
eb01459f | 450 | |
692a576b DV |
451 | if (obj->pages) { |
452 | page = obj->pages[offset >> PAGE_SHIFT]; | |
453 | release_page = 0; | |
454 | } else { | |
455 | page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT); | |
456 | if (IS_ERR(page)) { | |
457 | ret = PTR_ERR(page); | |
458 | goto out; | |
459 | } | |
460 | release_page = 1; | |
b65552f0 | 461 | } |
e5281ccd | 462 | |
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; | |
692a576b | 473 | page_cache_get(page); |
dbf7bff0 DV |
474 | mutex_unlock(&dev->struct_mutex); |
475 | ||
96d79b52 | 476 | if (!prefaulted) { |
f56f821f | 477 | ret = fault_in_multipages_writeable(user_data, remain); |
96d79b52 DV |
478 | /* Userspace is tricking us, but we've already clobbered |
479 | * its pages with the prefault and promised to write the | |
480 | * data up to the first fault. Hence ignore any errors | |
481 | * and just continue. */ | |
482 | (void)ret; | |
483 | prefaulted = 1; | |
484 | } | |
eb01459f | 485 | |
d174bd64 DV |
486 | ret = shmem_pread_slow(page, shmem_page_offset, page_length, |
487 | user_data, page_do_bit17_swizzling, | |
488 | needs_clflush); | |
eb01459f | 489 | |
dbf7bff0 | 490 | mutex_lock(&dev->struct_mutex); |
e5281ccd | 491 | page_cache_release(page); |
dbf7bff0 | 492 | next_page: |
e5281ccd | 493 | mark_page_accessed(page); |
692a576b DV |
494 | if (release_page) |
495 | page_cache_release(page); | |
e5281ccd | 496 | |
8461d226 DV |
497 | if (ret) { |
498 | ret = -EFAULT; | |
499 | goto out; | |
500 | } | |
501 | ||
eb01459f | 502 | remain -= page_length; |
8461d226 | 503 | user_data += page_length; |
eb01459f EA |
504 | offset += page_length; |
505 | } | |
506 | ||
4f27b75d | 507 | out: |
dbf7bff0 DV |
508 | if (hit_slowpath) { |
509 | /* Fixup: Kill any reinstated backing storage pages */ | |
510 | if (obj->madv == __I915_MADV_PURGED) | |
511 | i915_gem_object_truncate(obj); | |
512 | } | |
eb01459f EA |
513 | |
514 | return ret; | |
515 | } | |
516 | ||
673a394b EA |
517 | /** |
518 | * Reads data from the object referenced by handle. | |
519 | * | |
520 | * On error, the contents of *data are undefined. | |
521 | */ | |
522 | int | |
523 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 524 | struct drm_file *file) |
673a394b EA |
525 | { |
526 | struct drm_i915_gem_pread *args = data; | |
05394f39 | 527 | struct drm_i915_gem_object *obj; |
35b62a89 | 528 | int ret = 0; |
673a394b | 529 | |
51311d0a CW |
530 | if (args->size == 0) |
531 | return 0; | |
532 | ||
533 | if (!access_ok(VERIFY_WRITE, | |
534 | (char __user *)(uintptr_t)args->data_ptr, | |
535 | args->size)) | |
536 | return -EFAULT; | |
537 | ||
4f27b75d | 538 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 539 | if (ret) |
4f27b75d | 540 | return ret; |
673a394b | 541 | |
05394f39 | 542 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 543 | if (&obj->base == NULL) { |
1d7cfea1 CW |
544 | ret = -ENOENT; |
545 | goto unlock; | |
4f27b75d | 546 | } |
673a394b | 547 | |
7dcd2499 | 548 | /* Bounds check source. */ |
05394f39 CW |
549 | if (args->offset > obj->base.size || |
550 | args->size > obj->base.size - args->offset) { | |
ce9d419d | 551 | ret = -EINVAL; |
35b62a89 | 552 | goto out; |
ce9d419d CW |
553 | } |
554 | ||
1286ff73 DV |
555 | /* prime objects have no backing filp to GEM pread/pwrite |
556 | * pages from. | |
557 | */ | |
558 | if (!obj->base.filp) { | |
559 | ret = -EINVAL; | |
560 | goto out; | |
561 | } | |
562 | ||
db53a302 CW |
563 | trace_i915_gem_object_pread(obj, args->offset, args->size); |
564 | ||
dbf7bff0 | 565 | ret = i915_gem_shmem_pread(dev, obj, args, file); |
673a394b | 566 | |
35b62a89 | 567 | out: |
05394f39 | 568 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 569 | unlock: |
4f27b75d | 570 | mutex_unlock(&dev->struct_mutex); |
eb01459f | 571 | return ret; |
673a394b EA |
572 | } |
573 | ||
0839ccb8 KP |
574 | /* This is the fast write path which cannot handle |
575 | * page faults in the source data | |
9b7530cc | 576 | */ |
0839ccb8 KP |
577 | |
578 | static inline int | |
579 | fast_user_write(struct io_mapping *mapping, | |
580 | loff_t page_base, int page_offset, | |
581 | char __user *user_data, | |
582 | int length) | |
9b7530cc | 583 | { |
4f0c7cfb BW |
584 | void __iomem *vaddr_atomic; |
585 | void *vaddr; | |
0839ccb8 | 586 | unsigned long unwritten; |
9b7530cc | 587 | |
3e4d3af5 | 588 | vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base); |
4f0c7cfb BW |
589 | /* We can use the cpu mem copy function because this is X86. */ |
590 | vaddr = (void __force*)vaddr_atomic + page_offset; | |
591 | unwritten = __copy_from_user_inatomic_nocache(vaddr, | |
0839ccb8 | 592 | user_data, length); |
3e4d3af5 | 593 | io_mapping_unmap_atomic(vaddr_atomic); |
fbd5a26d | 594 | return unwritten; |
0839ccb8 KP |
595 | } |
596 | ||
3de09aa3 EA |
597 | /** |
598 | * This is the fast pwrite path, where we copy the data directly from the | |
599 | * user into the GTT, uncached. | |
600 | */ | |
673a394b | 601 | static int |
05394f39 CW |
602 | i915_gem_gtt_pwrite_fast(struct drm_device *dev, |
603 | struct drm_i915_gem_object *obj, | |
3de09aa3 | 604 | struct drm_i915_gem_pwrite *args, |
05394f39 | 605 | struct drm_file *file) |
673a394b | 606 | { |
0839ccb8 | 607 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b | 608 | ssize_t remain; |
0839ccb8 | 609 | loff_t offset, page_base; |
673a394b | 610 | char __user *user_data; |
935aaa69 DV |
611 | int page_offset, page_length, ret; |
612 | ||
86a1ee26 | 613 | ret = i915_gem_object_pin(obj, 0, true, true); |
935aaa69 DV |
614 | if (ret) |
615 | goto out; | |
616 | ||
617 | ret = i915_gem_object_set_to_gtt_domain(obj, true); | |
618 | if (ret) | |
619 | goto out_unpin; | |
620 | ||
621 | ret = i915_gem_object_put_fence(obj); | |
622 | if (ret) | |
623 | goto out_unpin; | |
673a394b EA |
624 | |
625 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
626 | remain = args->size; | |
673a394b | 627 | |
05394f39 | 628 | offset = obj->gtt_offset + args->offset; |
673a394b EA |
629 | |
630 | while (remain > 0) { | |
631 | /* Operation in this page | |
632 | * | |
0839ccb8 KP |
633 | * page_base = page offset within aperture |
634 | * page_offset = offset within page | |
635 | * page_length = bytes to copy for this page | |
673a394b | 636 | */ |
c8cbbb8b CW |
637 | page_base = offset & PAGE_MASK; |
638 | page_offset = offset_in_page(offset); | |
0839ccb8 KP |
639 | page_length = remain; |
640 | if ((page_offset + remain) > PAGE_SIZE) | |
641 | page_length = PAGE_SIZE - page_offset; | |
642 | ||
0839ccb8 | 643 | /* If we get a fault while copying data, then (presumably) our |
3de09aa3 EA |
644 | * source page isn't available. Return the error and we'll |
645 | * retry in the slow path. | |
0839ccb8 | 646 | */ |
fbd5a26d | 647 | if (fast_user_write(dev_priv->mm.gtt_mapping, page_base, |
935aaa69 DV |
648 | page_offset, user_data, page_length)) { |
649 | ret = -EFAULT; | |
650 | goto out_unpin; | |
651 | } | |
673a394b | 652 | |
0839ccb8 KP |
653 | remain -= page_length; |
654 | user_data += page_length; | |
655 | offset += page_length; | |
673a394b | 656 | } |
673a394b | 657 | |
935aaa69 DV |
658 | out_unpin: |
659 | i915_gem_object_unpin(obj); | |
660 | out: | |
3de09aa3 | 661 | return ret; |
673a394b EA |
662 | } |
663 | ||
d174bd64 DV |
664 | /* Per-page copy function for the shmem pwrite fastpath. |
665 | * Flushes invalid cachelines before writing to the target if | |
666 | * needs_clflush_before is set and flushes out any written cachelines after | |
667 | * writing if needs_clflush is set. */ | |
3043c60c | 668 | static int |
d174bd64 DV |
669 | shmem_pwrite_fast(struct page *page, int shmem_page_offset, int page_length, |
670 | char __user *user_data, | |
671 | bool page_do_bit17_swizzling, | |
672 | bool needs_clflush_before, | |
673 | bool needs_clflush_after) | |
673a394b | 674 | { |
d174bd64 | 675 | char *vaddr; |
673a394b | 676 | int ret; |
3de09aa3 | 677 | |
e7e58eb5 | 678 | if (unlikely(page_do_bit17_swizzling)) |
d174bd64 | 679 | return -EINVAL; |
3de09aa3 | 680 | |
d174bd64 DV |
681 | vaddr = kmap_atomic(page); |
682 | if (needs_clflush_before) | |
683 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
684 | page_length); | |
685 | ret = __copy_from_user_inatomic_nocache(vaddr + shmem_page_offset, | |
686 | user_data, | |
687 | page_length); | |
688 | if (needs_clflush_after) | |
689 | drm_clflush_virt_range(vaddr + shmem_page_offset, | |
690 | page_length); | |
691 | kunmap_atomic(vaddr); | |
3de09aa3 EA |
692 | |
693 | return ret; | |
694 | } | |
695 | ||
d174bd64 DV |
696 | /* Only difference to the fast-path function is that this can handle bit17 |
697 | * and uses non-atomic copy and kmap functions. */ | |
3043c60c | 698 | static int |
d174bd64 DV |
699 | shmem_pwrite_slow(struct page *page, int shmem_page_offset, int page_length, |
700 | char __user *user_data, | |
701 | bool page_do_bit17_swizzling, | |
702 | bool needs_clflush_before, | |
703 | bool needs_clflush_after) | |
673a394b | 704 | { |
d174bd64 DV |
705 | char *vaddr; |
706 | int ret; | |
e5281ccd | 707 | |
d174bd64 | 708 | vaddr = kmap(page); |
e7e58eb5 | 709 | if (unlikely(needs_clflush_before || page_do_bit17_swizzling)) |
23c18c71 DV |
710 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
711 | page_length, | |
712 | page_do_bit17_swizzling); | |
d174bd64 DV |
713 | if (page_do_bit17_swizzling) |
714 | ret = __copy_from_user_swizzled(vaddr, shmem_page_offset, | |
e5281ccd CW |
715 | user_data, |
716 | page_length); | |
d174bd64 DV |
717 | else |
718 | ret = __copy_from_user(vaddr + shmem_page_offset, | |
719 | user_data, | |
720 | page_length); | |
721 | if (needs_clflush_after) | |
23c18c71 DV |
722 | shmem_clflush_swizzled_range(vaddr + shmem_page_offset, |
723 | page_length, | |
724 | page_do_bit17_swizzling); | |
d174bd64 | 725 | kunmap(page); |
40123c1f | 726 | |
d174bd64 | 727 | return ret; |
40123c1f EA |
728 | } |
729 | ||
40123c1f | 730 | static int |
e244a443 DV |
731 | i915_gem_shmem_pwrite(struct drm_device *dev, |
732 | struct drm_i915_gem_object *obj, | |
733 | struct drm_i915_gem_pwrite *args, | |
734 | struct drm_file *file) | |
40123c1f | 735 | { |
05394f39 | 736 | struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; |
40123c1f | 737 | ssize_t remain; |
8c59967c DV |
738 | loff_t offset; |
739 | char __user *user_data; | |
eb2c0c81 | 740 | int shmem_page_offset, page_length, ret = 0; |
8c59967c | 741 | int obj_do_bit17_swizzling, page_do_bit17_swizzling; |
e244a443 | 742 | int hit_slowpath = 0; |
58642885 DV |
743 | int needs_clflush_after = 0; |
744 | int needs_clflush_before = 0; | |
692a576b | 745 | int release_page; |
40123c1f | 746 | |
8c59967c | 747 | user_data = (char __user *) (uintptr_t) args->data_ptr; |
40123c1f EA |
748 | remain = args->size; |
749 | ||
8c59967c | 750 | obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
40123c1f | 751 | |
58642885 DV |
752 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
753 | /* If we're not in the cpu write domain, set ourself into the gtt | |
754 | * write domain and manually flush cachelines (if required). This | |
755 | * optimizes for the case when the gpu will use the data | |
756 | * right away and we therefore have to clflush anyway. */ | |
757 | if (obj->cache_level == I915_CACHE_NONE) | |
758 | needs_clflush_after = 1; | |
6c085a72 CW |
759 | if (obj->gtt_space) { |
760 | ret = i915_gem_object_set_to_gtt_domain(obj, true); | |
761 | if (ret) | |
762 | return ret; | |
763 | } | |
58642885 DV |
764 | } |
765 | /* Same trick applies for invalidate partially written cachelines before | |
766 | * writing. */ | |
767 | if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU) | |
768 | && obj->cache_level == I915_CACHE_NONE) | |
769 | needs_clflush_before = 1; | |
770 | ||
673a394b | 771 | offset = args->offset; |
05394f39 | 772 | obj->dirty = 1; |
673a394b | 773 | |
40123c1f | 774 | while (remain > 0) { |
e5281ccd | 775 | struct page *page; |
58642885 | 776 | int partial_cacheline_write; |
e5281ccd | 777 | |
40123c1f EA |
778 | /* Operation in this page |
779 | * | |
40123c1f | 780 | * shmem_page_offset = offset within page in shmem file |
40123c1f EA |
781 | * page_length = bytes to copy for this page |
782 | */ | |
c8cbbb8b | 783 | shmem_page_offset = offset_in_page(offset); |
40123c1f EA |
784 | |
785 | page_length = remain; | |
786 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
787 | page_length = PAGE_SIZE - shmem_page_offset; | |
40123c1f | 788 | |
58642885 DV |
789 | /* If we don't overwrite a cacheline completely we need to be |
790 | * careful to have up-to-date data by first clflushing. Don't | |
791 | * overcomplicate things and flush the entire patch. */ | |
792 | partial_cacheline_write = needs_clflush_before && | |
793 | ((shmem_page_offset | page_length) | |
794 | & (boot_cpu_data.x86_clflush_size - 1)); | |
795 | ||
692a576b DV |
796 | if (obj->pages) { |
797 | page = obj->pages[offset >> PAGE_SHIFT]; | |
798 | release_page = 0; | |
799 | } else { | |
800 | page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT); | |
801 | if (IS_ERR(page)) { | |
802 | ret = PTR_ERR(page); | |
803 | goto out; | |
804 | } | |
805 | release_page = 1; | |
e5281ccd CW |
806 | } |
807 | ||
8c59967c DV |
808 | page_do_bit17_swizzling = obj_do_bit17_swizzling && |
809 | (page_to_phys(page) & (1 << 17)) != 0; | |
810 | ||
d174bd64 DV |
811 | ret = shmem_pwrite_fast(page, shmem_page_offset, page_length, |
812 | user_data, page_do_bit17_swizzling, | |
813 | partial_cacheline_write, | |
814 | needs_clflush_after); | |
815 | if (ret == 0) | |
816 | goto next_page; | |
e244a443 DV |
817 | |
818 | hit_slowpath = 1; | |
692a576b | 819 | page_cache_get(page); |
e244a443 DV |
820 | mutex_unlock(&dev->struct_mutex); |
821 | ||
d174bd64 DV |
822 | ret = shmem_pwrite_slow(page, shmem_page_offset, page_length, |
823 | user_data, page_do_bit17_swizzling, | |
824 | partial_cacheline_write, | |
825 | needs_clflush_after); | |
40123c1f | 826 | |
e244a443 | 827 | mutex_lock(&dev->struct_mutex); |
692a576b | 828 | page_cache_release(page); |
e244a443 | 829 | next_page: |
e5281ccd CW |
830 | set_page_dirty(page); |
831 | mark_page_accessed(page); | |
692a576b DV |
832 | if (release_page) |
833 | page_cache_release(page); | |
e5281ccd | 834 | |
8c59967c DV |
835 | if (ret) { |
836 | ret = -EFAULT; | |
837 | goto out; | |
838 | } | |
839 | ||
40123c1f | 840 | remain -= page_length; |
8c59967c | 841 | user_data += page_length; |
40123c1f | 842 | offset += page_length; |
673a394b EA |
843 | } |
844 | ||
fbd5a26d | 845 | out: |
e244a443 DV |
846 | if (hit_slowpath) { |
847 | /* Fixup: Kill any reinstated backing storage pages */ | |
848 | if (obj->madv == __I915_MADV_PURGED) | |
849 | i915_gem_object_truncate(obj); | |
850 | /* and flush dirty cachelines in case the object isn't in the cpu write | |
851 | * domain anymore. */ | |
852 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) { | |
853 | i915_gem_clflush_object(obj); | |
854 | intel_gtt_chipset_flush(); | |
855 | } | |
8c59967c | 856 | } |
673a394b | 857 | |
58642885 DV |
858 | if (needs_clflush_after) |
859 | intel_gtt_chipset_flush(); | |
860 | ||
40123c1f | 861 | return ret; |
673a394b EA |
862 | } |
863 | ||
864 | /** | |
865 | * Writes data to the object referenced by handle. | |
866 | * | |
867 | * On error, the contents of the buffer that were to be modified are undefined. | |
868 | */ | |
869 | int | |
870 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, | |
fbd5a26d | 871 | struct drm_file *file) |
673a394b EA |
872 | { |
873 | struct drm_i915_gem_pwrite *args = data; | |
05394f39 | 874 | struct drm_i915_gem_object *obj; |
51311d0a CW |
875 | int ret; |
876 | ||
877 | if (args->size == 0) | |
878 | return 0; | |
879 | ||
880 | if (!access_ok(VERIFY_READ, | |
881 | (char __user *)(uintptr_t)args->data_ptr, | |
882 | args->size)) | |
883 | return -EFAULT; | |
884 | ||
f56f821f DV |
885 | ret = fault_in_multipages_readable((char __user *)(uintptr_t)args->data_ptr, |
886 | args->size); | |
51311d0a CW |
887 | if (ret) |
888 | return -EFAULT; | |
673a394b | 889 | |
fbd5a26d | 890 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 891 | if (ret) |
fbd5a26d | 892 | return ret; |
1d7cfea1 | 893 | |
05394f39 | 894 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 895 | if (&obj->base == NULL) { |
1d7cfea1 CW |
896 | ret = -ENOENT; |
897 | goto unlock; | |
fbd5a26d | 898 | } |
673a394b | 899 | |
7dcd2499 | 900 | /* Bounds check destination. */ |
05394f39 CW |
901 | if (args->offset > obj->base.size || |
902 | args->size > obj->base.size - args->offset) { | |
ce9d419d | 903 | ret = -EINVAL; |
35b62a89 | 904 | goto out; |
ce9d419d CW |
905 | } |
906 | ||
1286ff73 DV |
907 | /* prime objects have no backing filp to GEM pread/pwrite |
908 | * pages from. | |
909 | */ | |
910 | if (!obj->base.filp) { | |
911 | ret = -EINVAL; | |
912 | goto out; | |
913 | } | |
914 | ||
db53a302 CW |
915 | trace_i915_gem_object_pwrite(obj, args->offset, args->size); |
916 | ||
935aaa69 | 917 | ret = -EFAULT; |
673a394b EA |
918 | /* We can only do the GTT pwrite on untiled buffers, as otherwise |
919 | * it would end up going through the fenced access, and we'll get | |
920 | * different detiling behavior between reading and writing. | |
921 | * pread/pwrite currently are reading and writing from the CPU | |
922 | * perspective, requiring manual detiling by the client. | |
923 | */ | |
5c0480f2 | 924 | if (obj->phys_obj) { |
fbd5a26d | 925 | ret = i915_gem_phys_pwrite(dev, obj, args, file); |
5c0480f2 DV |
926 | goto out; |
927 | } | |
928 | ||
86a1ee26 | 929 | if (obj->cache_level == I915_CACHE_NONE && |
c07496fa | 930 | obj->tiling_mode == I915_TILING_NONE && |
5c0480f2 | 931 | obj->base.write_domain != I915_GEM_DOMAIN_CPU) { |
fbd5a26d | 932 | ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file); |
935aaa69 DV |
933 | /* Note that the gtt paths might fail with non-page-backed user |
934 | * pointers (e.g. gtt mappings when moving data between | |
935 | * textures). Fallback to the shmem path in that case. */ | |
fbd5a26d | 936 | } |
673a394b | 937 | |
86a1ee26 | 938 | if (ret == -EFAULT || ret == -ENOSPC) |
935aaa69 | 939 | ret = i915_gem_shmem_pwrite(dev, obj, args, file); |
5c0480f2 | 940 | |
35b62a89 | 941 | out: |
05394f39 | 942 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 943 | unlock: |
fbd5a26d | 944 | mutex_unlock(&dev->struct_mutex); |
673a394b EA |
945 | return ret; |
946 | } | |
947 | ||
948 | /** | |
2ef7eeaa EA |
949 | * Called when user space prepares to use an object with the CPU, either |
950 | * through the mmap ioctl's mapping or a GTT mapping. | |
673a394b EA |
951 | */ |
952 | int | |
953 | i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 954 | struct drm_file *file) |
673a394b EA |
955 | { |
956 | struct drm_i915_gem_set_domain *args = data; | |
05394f39 | 957 | struct drm_i915_gem_object *obj; |
2ef7eeaa EA |
958 | uint32_t read_domains = args->read_domains; |
959 | uint32_t write_domain = args->write_domain; | |
673a394b EA |
960 | int ret; |
961 | ||
2ef7eeaa | 962 | /* Only handle setting domains to types used by the CPU. */ |
21d509e3 | 963 | if (write_domain & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
964 | return -EINVAL; |
965 | ||
21d509e3 | 966 | if (read_domains & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
967 | return -EINVAL; |
968 | ||
969 | /* Having something in the write domain implies it's in the read | |
970 | * domain, and only that read domain. Enforce that in the request. | |
971 | */ | |
972 | if (write_domain != 0 && read_domains != write_domain) | |
973 | return -EINVAL; | |
974 | ||
76c1dec1 | 975 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 976 | if (ret) |
76c1dec1 | 977 | return ret; |
1d7cfea1 | 978 | |
05394f39 | 979 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 980 | if (&obj->base == NULL) { |
1d7cfea1 CW |
981 | ret = -ENOENT; |
982 | goto unlock; | |
76c1dec1 | 983 | } |
673a394b | 984 | |
2ef7eeaa EA |
985 | if (read_domains & I915_GEM_DOMAIN_GTT) { |
986 | ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0); | |
02354392 EA |
987 | |
988 | /* Silently promote "you're not bound, there was nothing to do" | |
989 | * to success, since the client was just asking us to | |
990 | * make sure everything was done. | |
991 | */ | |
992 | if (ret == -EINVAL) | |
993 | ret = 0; | |
2ef7eeaa | 994 | } else { |
e47c68e9 | 995 | ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0); |
2ef7eeaa EA |
996 | } |
997 | ||
05394f39 | 998 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 999 | unlock: |
673a394b EA |
1000 | mutex_unlock(&dev->struct_mutex); |
1001 | return ret; | |
1002 | } | |
1003 | ||
1004 | /** | |
1005 | * Called when user space has done writes to this buffer | |
1006 | */ | |
1007 | int | |
1008 | i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1009 | struct drm_file *file) |
673a394b EA |
1010 | { |
1011 | struct drm_i915_gem_sw_finish *args = data; | |
05394f39 | 1012 | struct drm_i915_gem_object *obj; |
673a394b EA |
1013 | int ret = 0; |
1014 | ||
76c1dec1 | 1015 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1016 | if (ret) |
76c1dec1 | 1017 | return ret; |
1d7cfea1 | 1018 | |
05394f39 | 1019 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 1020 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1021 | ret = -ENOENT; |
1022 | goto unlock; | |
673a394b EA |
1023 | } |
1024 | ||
673a394b | 1025 | /* Pinned buffers may be scanout, so flush the cache */ |
05394f39 | 1026 | if (obj->pin_count) |
e47c68e9 EA |
1027 | i915_gem_object_flush_cpu_write_domain(obj); |
1028 | ||
05394f39 | 1029 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1030 | unlock: |
673a394b EA |
1031 | mutex_unlock(&dev->struct_mutex); |
1032 | return ret; | |
1033 | } | |
1034 | ||
1035 | /** | |
1036 | * Maps the contents of an object, returning the address it is mapped | |
1037 | * into. | |
1038 | * | |
1039 | * While the mapping holds a reference on the contents of the object, it doesn't | |
1040 | * imply a ref on the object itself. | |
1041 | */ | |
1042 | int | |
1043 | i915_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1044 | struct drm_file *file) |
673a394b EA |
1045 | { |
1046 | struct drm_i915_gem_mmap *args = data; | |
1047 | struct drm_gem_object *obj; | |
673a394b EA |
1048 | unsigned long addr; |
1049 | ||
05394f39 | 1050 | obj = drm_gem_object_lookup(dev, file, args->handle); |
673a394b | 1051 | if (obj == NULL) |
bf79cb91 | 1052 | return -ENOENT; |
673a394b | 1053 | |
1286ff73 DV |
1054 | /* prime objects have no backing filp to GEM mmap |
1055 | * pages from. | |
1056 | */ | |
1057 | if (!obj->filp) { | |
1058 | drm_gem_object_unreference_unlocked(obj); | |
1059 | return -EINVAL; | |
1060 | } | |
1061 | ||
6be5ceb0 | 1062 | addr = vm_mmap(obj->filp, 0, args->size, |
673a394b EA |
1063 | PROT_READ | PROT_WRITE, MAP_SHARED, |
1064 | args->offset); | |
bc9025bd | 1065 | drm_gem_object_unreference_unlocked(obj); |
673a394b EA |
1066 | if (IS_ERR((void *)addr)) |
1067 | return addr; | |
1068 | ||
1069 | args->addr_ptr = (uint64_t) addr; | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
de151cf6 JB |
1074 | /** |
1075 | * i915_gem_fault - fault a page into the GTT | |
1076 | * vma: VMA in question | |
1077 | * vmf: fault info | |
1078 | * | |
1079 | * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped | |
1080 | * from userspace. The fault handler takes care of binding the object to | |
1081 | * the GTT (if needed), allocating and programming a fence register (again, | |
1082 | * only if needed based on whether the old reg is still valid or the object | |
1083 | * is tiled) and inserting a new PTE into the faulting process. | |
1084 | * | |
1085 | * Note that the faulting process may involve evicting existing objects | |
1086 | * from the GTT and/or fence registers to make room. So performance may | |
1087 | * suffer if the GTT working set is large or there are few fence registers | |
1088 | * left. | |
1089 | */ | |
1090 | int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1091 | { | |
05394f39 CW |
1092 | struct drm_i915_gem_object *obj = to_intel_bo(vma->vm_private_data); |
1093 | struct drm_device *dev = obj->base.dev; | |
7d1c4804 | 1094 | drm_i915_private_t *dev_priv = dev->dev_private; |
de151cf6 JB |
1095 | pgoff_t page_offset; |
1096 | unsigned long pfn; | |
1097 | int ret = 0; | |
0f973f27 | 1098 | bool write = !!(vmf->flags & FAULT_FLAG_WRITE); |
de151cf6 JB |
1099 | |
1100 | /* We don't use vmf->pgoff since that has the fake offset */ | |
1101 | page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> | |
1102 | PAGE_SHIFT; | |
1103 | ||
d9bc7e9f CW |
1104 | ret = i915_mutex_lock_interruptible(dev); |
1105 | if (ret) | |
1106 | goto out; | |
a00b10c3 | 1107 | |
db53a302 CW |
1108 | trace_i915_gem_object_fault(obj, page_offset, true, write); |
1109 | ||
d9bc7e9f | 1110 | /* Now bind it into the GTT if needed */ |
919926ae CW |
1111 | if (!obj->map_and_fenceable) { |
1112 | ret = i915_gem_object_unbind(obj); | |
1113 | if (ret) | |
1114 | goto unlock; | |
a00b10c3 | 1115 | } |
05394f39 | 1116 | if (!obj->gtt_space) { |
86a1ee26 | 1117 | ret = i915_gem_object_bind_to_gtt(obj, 0, true, false); |
c715089f CW |
1118 | if (ret) |
1119 | goto unlock; | |
de151cf6 | 1120 | |
e92d03bf EA |
1121 | ret = i915_gem_object_set_to_gtt_domain(obj, write); |
1122 | if (ret) | |
1123 | goto unlock; | |
1124 | } | |
4a684a41 | 1125 | |
74898d7e DV |
1126 | if (!obj->has_global_gtt_mapping) |
1127 | i915_gem_gtt_bind_object(obj, obj->cache_level); | |
1128 | ||
06d98131 | 1129 | ret = i915_gem_object_get_fence(obj); |
d9e86c0e CW |
1130 | if (ret) |
1131 | goto unlock; | |
de151cf6 | 1132 | |
05394f39 CW |
1133 | if (i915_gem_object_is_inactive(obj)) |
1134 | list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list); | |
7d1c4804 | 1135 | |
6299f992 CW |
1136 | obj->fault_mappable = true; |
1137 | ||
dd2757f8 | 1138 | pfn = ((dev_priv->mm.gtt_base_addr + obj->gtt_offset) >> PAGE_SHIFT) + |
de151cf6 JB |
1139 | page_offset; |
1140 | ||
1141 | /* Finally, remap it using the new GTT offset */ | |
1142 | ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn); | |
c715089f | 1143 | unlock: |
de151cf6 | 1144 | mutex_unlock(&dev->struct_mutex); |
d9bc7e9f | 1145 | out: |
de151cf6 | 1146 | switch (ret) { |
d9bc7e9f | 1147 | case -EIO: |
a9340cca DV |
1148 | /* If this -EIO is due to a gpu hang, give the reset code a |
1149 | * chance to clean up the mess. Otherwise return the proper | |
1150 | * SIGBUS. */ | |
1151 | if (!atomic_read(&dev_priv->mm.wedged)) | |
1152 | return VM_FAULT_SIGBUS; | |
045e769a | 1153 | case -EAGAIN: |
d9bc7e9f CW |
1154 | /* Give the error handler a chance to run and move the |
1155 | * objects off the GPU active list. Next time we service the | |
1156 | * fault, we should be able to transition the page into the | |
1157 | * GTT without touching the GPU (and so avoid further | |
1158 | * EIO/EGAIN). If the GPU is wedged, then there is no issue | |
1159 | * with coherency, just lost writes. | |
1160 | */ | |
045e769a | 1161 | set_need_resched(); |
c715089f CW |
1162 | case 0: |
1163 | case -ERESTARTSYS: | |
bed636ab | 1164 | case -EINTR: |
c715089f | 1165 | return VM_FAULT_NOPAGE; |
de151cf6 | 1166 | case -ENOMEM: |
de151cf6 | 1167 | return VM_FAULT_OOM; |
de151cf6 | 1168 | default: |
c715089f | 1169 | return VM_FAULT_SIGBUS; |
de151cf6 JB |
1170 | } |
1171 | } | |
1172 | ||
901782b2 CW |
1173 | /** |
1174 | * i915_gem_release_mmap - remove physical page mappings | |
1175 | * @obj: obj in question | |
1176 | * | |
af901ca1 | 1177 | * Preserve the reservation of the mmapping with the DRM core code, but |
901782b2 CW |
1178 | * relinquish ownership of the pages back to the system. |
1179 | * | |
1180 | * It is vital that we remove the page mapping if we have mapped a tiled | |
1181 | * object through the GTT and then lose the fence register due to | |
1182 | * resource pressure. Similarly if the object has been moved out of the | |
1183 | * aperture, than pages mapped into userspace must be revoked. Removing the | |
1184 | * mapping will then trigger a page fault on the next user access, allowing | |
1185 | * fixup by i915_gem_fault(). | |
1186 | */ | |
d05ca301 | 1187 | void |
05394f39 | 1188 | i915_gem_release_mmap(struct drm_i915_gem_object *obj) |
901782b2 | 1189 | { |
6299f992 CW |
1190 | if (!obj->fault_mappable) |
1191 | return; | |
901782b2 | 1192 | |
f6e47884 CW |
1193 | if (obj->base.dev->dev_mapping) |
1194 | unmap_mapping_range(obj->base.dev->dev_mapping, | |
1195 | (loff_t)obj->base.map_list.hash.key<<PAGE_SHIFT, | |
1196 | obj->base.size, 1); | |
fb7d516a | 1197 | |
6299f992 | 1198 | obj->fault_mappable = false; |
901782b2 CW |
1199 | } |
1200 | ||
92b88aeb | 1201 | static uint32_t |
e28f8711 | 1202 | i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode) |
92b88aeb | 1203 | { |
e28f8711 | 1204 | uint32_t gtt_size; |
92b88aeb CW |
1205 | |
1206 | if (INTEL_INFO(dev)->gen >= 4 || | |
e28f8711 CW |
1207 | tiling_mode == I915_TILING_NONE) |
1208 | return size; | |
92b88aeb CW |
1209 | |
1210 | /* Previous chips need a power-of-two fence region when tiling */ | |
1211 | if (INTEL_INFO(dev)->gen == 3) | |
e28f8711 | 1212 | gtt_size = 1024*1024; |
92b88aeb | 1213 | else |
e28f8711 | 1214 | gtt_size = 512*1024; |
92b88aeb | 1215 | |
e28f8711 CW |
1216 | while (gtt_size < size) |
1217 | gtt_size <<= 1; | |
92b88aeb | 1218 | |
e28f8711 | 1219 | return gtt_size; |
92b88aeb CW |
1220 | } |
1221 | ||
de151cf6 JB |
1222 | /** |
1223 | * i915_gem_get_gtt_alignment - return required GTT alignment for an object | |
1224 | * @obj: object to check | |
1225 | * | |
1226 | * Return the required GTT alignment for an object, taking into account | |
5e783301 | 1227 | * potential fence register mapping. |
de151cf6 JB |
1228 | */ |
1229 | static uint32_t | |
e28f8711 CW |
1230 | i915_gem_get_gtt_alignment(struct drm_device *dev, |
1231 | uint32_t size, | |
1232 | int tiling_mode) | |
de151cf6 | 1233 | { |
de151cf6 JB |
1234 | /* |
1235 | * Minimum alignment is 4k (GTT page size), but might be greater | |
1236 | * if a fence register is needed for the object. | |
1237 | */ | |
a00b10c3 | 1238 | if (INTEL_INFO(dev)->gen >= 4 || |
e28f8711 | 1239 | tiling_mode == I915_TILING_NONE) |
de151cf6 JB |
1240 | return 4096; |
1241 | ||
a00b10c3 CW |
1242 | /* |
1243 | * Previous chips need to be aligned to the size of the smallest | |
1244 | * fence register that can contain the object. | |
1245 | */ | |
e28f8711 | 1246 | return i915_gem_get_gtt_size(dev, size, tiling_mode); |
a00b10c3 CW |
1247 | } |
1248 | ||
5e783301 DV |
1249 | /** |
1250 | * i915_gem_get_unfenced_gtt_alignment - return required GTT alignment for an | |
1251 | * unfenced object | |
e28f8711 CW |
1252 | * @dev: the device |
1253 | * @size: size of the object | |
1254 | * @tiling_mode: tiling mode of the object | |
5e783301 DV |
1255 | * |
1256 | * Return the required GTT alignment for an object, only taking into account | |
1257 | * unfenced tiled surface requirements. | |
1258 | */ | |
467cffba | 1259 | uint32_t |
e28f8711 CW |
1260 | i915_gem_get_unfenced_gtt_alignment(struct drm_device *dev, |
1261 | uint32_t size, | |
1262 | int tiling_mode) | |
5e783301 | 1263 | { |
5e783301 DV |
1264 | /* |
1265 | * Minimum alignment is 4k (GTT page size) for sane hw. | |
1266 | */ | |
1267 | if (INTEL_INFO(dev)->gen >= 4 || IS_G33(dev) || | |
e28f8711 | 1268 | tiling_mode == I915_TILING_NONE) |
5e783301 DV |
1269 | return 4096; |
1270 | ||
e28f8711 CW |
1271 | /* Previous hardware however needs to be aligned to a power-of-two |
1272 | * tile height. The simplest method for determining this is to reuse | |
1273 | * the power-of-tile object size. | |
5e783301 | 1274 | */ |
e28f8711 | 1275 | return i915_gem_get_gtt_size(dev, size, tiling_mode); |
5e783301 DV |
1276 | } |
1277 | ||
d8cb5086 CW |
1278 | static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj) |
1279 | { | |
1280 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
1281 | int ret; | |
1282 | ||
1283 | if (obj->base.map_list.map) | |
1284 | return 0; | |
1285 | ||
1286 | ret = drm_gem_create_mmap_offset(&obj->base); | |
1287 | if (ret != -ENOSPC) | |
1288 | return ret; | |
1289 | ||
1290 | /* Badly fragmented mmap space? The only way we can recover | |
1291 | * space is by destroying unwanted objects. We can't randomly release | |
1292 | * mmap_offsets as userspace expects them to be persistent for the | |
1293 | * lifetime of the objects. The closest we can is to release the | |
1294 | * offsets on purgeable objects by truncating it and marking it purged, | |
1295 | * which prevents userspace from ever using that object again. | |
1296 | */ | |
1297 | i915_gem_purge(dev_priv, obj->base.size >> PAGE_SHIFT); | |
1298 | ret = drm_gem_create_mmap_offset(&obj->base); | |
1299 | if (ret != -ENOSPC) | |
1300 | return ret; | |
1301 | ||
1302 | i915_gem_shrink_all(dev_priv); | |
1303 | return drm_gem_create_mmap_offset(&obj->base); | |
1304 | } | |
1305 | ||
1306 | static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object *obj) | |
1307 | { | |
1308 | if (!obj->base.map_list.map) | |
1309 | return; | |
1310 | ||
1311 | drm_gem_free_mmap_offset(&obj->base); | |
1312 | } | |
1313 | ||
de151cf6 | 1314 | int |
ff72145b DA |
1315 | i915_gem_mmap_gtt(struct drm_file *file, |
1316 | struct drm_device *dev, | |
1317 | uint32_t handle, | |
1318 | uint64_t *offset) | |
de151cf6 | 1319 | { |
da761a6e | 1320 | struct drm_i915_private *dev_priv = dev->dev_private; |
05394f39 | 1321 | struct drm_i915_gem_object *obj; |
de151cf6 JB |
1322 | int ret; |
1323 | ||
76c1dec1 | 1324 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 1325 | if (ret) |
76c1dec1 | 1326 | return ret; |
de151cf6 | 1327 | |
ff72145b | 1328 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle)); |
c8725226 | 1329 | if (&obj->base == NULL) { |
1d7cfea1 CW |
1330 | ret = -ENOENT; |
1331 | goto unlock; | |
1332 | } | |
de151cf6 | 1333 | |
05394f39 | 1334 | if (obj->base.size > dev_priv->mm.gtt_mappable_end) { |
da761a6e | 1335 | ret = -E2BIG; |
ff56b0bc | 1336 | goto out; |
da761a6e CW |
1337 | } |
1338 | ||
05394f39 | 1339 | if (obj->madv != I915_MADV_WILLNEED) { |
ab18282d | 1340 | DRM_ERROR("Attempting to mmap a purgeable buffer\n"); |
1d7cfea1 CW |
1341 | ret = -EINVAL; |
1342 | goto out; | |
ab18282d CW |
1343 | } |
1344 | ||
d8cb5086 CW |
1345 | ret = i915_gem_object_create_mmap_offset(obj); |
1346 | if (ret) | |
1347 | goto out; | |
de151cf6 | 1348 | |
ff72145b | 1349 | *offset = (u64)obj->base.map_list.hash.key << PAGE_SHIFT; |
de151cf6 | 1350 | |
1d7cfea1 | 1351 | out: |
05394f39 | 1352 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 1353 | unlock: |
de151cf6 | 1354 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 1355 | return ret; |
de151cf6 JB |
1356 | } |
1357 | ||
ff72145b DA |
1358 | /** |
1359 | * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing | |
1360 | * @dev: DRM device | |
1361 | * @data: GTT mapping ioctl data | |
1362 | * @file: GEM object info | |
1363 | * | |
1364 | * Simply returns the fake offset to userspace so it can mmap it. | |
1365 | * The mmap call will end up in drm_gem_mmap(), which will set things | |
1366 | * up so we can get faults in the handler above. | |
1367 | * | |
1368 | * The fault handler will take care of binding the object into the GTT | |
1369 | * (since it may have been evicted to make room for something), allocating | |
1370 | * a fence register, and mapping the appropriate aperture address into | |
1371 | * userspace. | |
1372 | */ | |
1373 | int | |
1374 | i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, | |
1375 | struct drm_file *file) | |
1376 | { | |
1377 | struct drm_i915_gem_mmap_gtt *args = data; | |
1378 | ||
ff72145b DA |
1379 | return i915_gem_mmap_gtt(file, dev, args->handle, &args->offset); |
1380 | } | |
1381 | ||
225067ee DV |
1382 | /* Immediately discard the backing storage */ |
1383 | static void | |
1384 | i915_gem_object_truncate(struct drm_i915_gem_object *obj) | |
1385 | { | |
1386 | struct inode *inode; | |
1387 | ||
1388 | /* Our goal here is to return as much of the memory as | |
1389 | * is possible back to the system as we are called from OOM. | |
1390 | * To do this we must instruct the shmfs to drop all of its | |
1391 | * backing pages, *now*. | |
1392 | */ | |
1393 | inode = obj->base.filp->f_path.dentry->d_inode; | |
1394 | shmem_truncate_range(inode, 0, (loff_t)-1); | |
1395 | ||
d8cb5086 | 1396 | i915_gem_object_free_mmap_offset(obj); |
225067ee DV |
1397 | |
1398 | obj->madv = __I915_MADV_PURGED; | |
1399 | } | |
1400 | ||
1401 | static inline int | |
1402 | i915_gem_object_is_purgeable(struct drm_i915_gem_object *obj) | |
1403 | { | |
1404 | return obj->madv == I915_MADV_DONTNEED; | |
1405 | } | |
1406 | ||
6c085a72 | 1407 | static int |
225067ee DV |
1408 | i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj) |
1409 | { | |
1410 | int page_count = obj->base.size / PAGE_SIZE; | |
6c085a72 | 1411 | int ret, i; |
225067ee | 1412 | |
c4670ad0 CW |
1413 | BUG_ON(obj->gtt_space); |
1414 | ||
6c085a72 CW |
1415 | if (obj->pages == NULL) |
1416 | return 0; | |
225067ee | 1417 | |
6c085a72 | 1418 | BUG_ON(obj->gtt_space); |
225067ee DV |
1419 | BUG_ON(obj->madv == __I915_MADV_PURGED); |
1420 | ||
6c085a72 CW |
1421 | ret = i915_gem_object_set_to_cpu_domain(obj, true); |
1422 | if (ret) { | |
1423 | /* In the event of a disaster, abandon all caches and | |
1424 | * hope for the best. | |
1425 | */ | |
1426 | WARN_ON(ret != -EIO); | |
1427 | i915_gem_clflush_object(obj); | |
1428 | obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
1429 | } | |
1430 | ||
225067ee DV |
1431 | if (i915_gem_object_needs_bit17_swizzle(obj)) |
1432 | i915_gem_object_save_bit_17_swizzle(obj); | |
1433 | ||
1434 | if (obj->madv == I915_MADV_DONTNEED) | |
1435 | obj->dirty = 0; | |
1436 | ||
1437 | for (i = 0; i < page_count; i++) { | |
1438 | if (obj->dirty) | |
1439 | set_page_dirty(obj->pages[i]); | |
1440 | ||
1441 | if (obj->madv == I915_MADV_WILLNEED) | |
1442 | mark_page_accessed(obj->pages[i]); | |
1443 | ||
1444 | page_cache_release(obj->pages[i]); | |
1445 | } | |
1446 | obj->dirty = 0; | |
1447 | ||
1448 | drm_free_large(obj->pages); | |
1449 | obj->pages = NULL; | |
6c085a72 CW |
1450 | |
1451 | list_del(&obj->gtt_list); | |
1452 | ||
1453 | if (i915_gem_object_is_purgeable(obj)) | |
1454 | i915_gem_object_truncate(obj); | |
1455 | ||
1456 | return 0; | |
1457 | } | |
1458 | ||
1459 | static long | |
1460 | i915_gem_purge(struct drm_i915_private *dev_priv, long target) | |
1461 | { | |
1462 | struct drm_i915_gem_object *obj, *next; | |
1463 | long count = 0; | |
1464 | ||
1465 | list_for_each_entry_safe(obj, next, | |
1466 | &dev_priv->mm.unbound_list, | |
1467 | gtt_list) { | |
1468 | if (i915_gem_object_is_purgeable(obj) && | |
1469 | i915_gem_object_put_pages_gtt(obj) == 0) { | |
1470 | count += obj->base.size >> PAGE_SHIFT; | |
1471 | if (count >= target) | |
1472 | return count; | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | list_for_each_entry_safe(obj, next, | |
1477 | &dev_priv->mm.inactive_list, | |
1478 | mm_list) { | |
1479 | if (i915_gem_object_is_purgeable(obj) && | |
1480 | i915_gem_object_unbind(obj) == 0 && | |
1481 | i915_gem_object_put_pages_gtt(obj) == 0) { | |
1482 | count += obj->base.size >> PAGE_SHIFT; | |
1483 | if (count >= target) | |
1484 | return count; | |
1485 | } | |
1486 | } | |
1487 | ||
1488 | return count; | |
1489 | } | |
1490 | ||
1491 | static void | |
1492 | i915_gem_shrink_all(struct drm_i915_private *dev_priv) | |
1493 | { | |
1494 | struct drm_i915_gem_object *obj, *next; | |
1495 | ||
1496 | i915_gem_evict_everything(dev_priv->dev); | |
1497 | ||
1498 | list_for_each_entry_safe(obj, next, &dev_priv->mm.unbound_list, gtt_list) | |
1499 | i915_gem_object_put_pages_gtt(obj); | |
225067ee DV |
1500 | } |
1501 | ||
1286ff73 | 1502 | int |
6c085a72 | 1503 | i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) |
e5281ccd | 1504 | { |
6c085a72 | 1505 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
e5281ccd CW |
1506 | int page_count, i; |
1507 | struct address_space *mapping; | |
e5281ccd | 1508 | struct page *page; |
6c085a72 | 1509 | gfp_t gfp; |
e5281ccd | 1510 | |
1286ff73 DV |
1511 | if (obj->pages || obj->sg_table) |
1512 | return 0; | |
1513 | ||
6c085a72 CW |
1514 | /* Assert that the object is not currently in any GPU domain. As it |
1515 | * wasn't in the GTT, there shouldn't be any way it could have been in | |
1516 | * a GPU cache | |
1517 | */ | |
1518 | BUG_ON(obj->base.read_domains & I915_GEM_GPU_DOMAINS); | |
1519 | BUG_ON(obj->base.write_domain & I915_GEM_GPU_DOMAINS); | |
1520 | ||
e5281ccd CW |
1521 | /* Get the list of pages out of our struct file. They'll be pinned |
1522 | * at this point until we release them. | |
1523 | */ | |
05394f39 | 1524 | page_count = obj->base.size / PAGE_SIZE; |
05394f39 CW |
1525 | obj->pages = drm_malloc_ab(page_count, sizeof(struct page *)); |
1526 | if (obj->pages == NULL) | |
e5281ccd CW |
1527 | return -ENOMEM; |
1528 | ||
6c085a72 CW |
1529 | /* Fail silently without starting the shrinker */ |
1530 | mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; | |
1531 | gfp = mapping_gfp_mask(mapping); | |
1532 | gfp |= __GFP_NORETRY | __GFP_NOWARN | __GFP_NO_KSWAPD; | |
1533 | gfp &= ~(__GFP_IO | __GFP_WAIT); | |
e5281ccd | 1534 | for (i = 0; i < page_count; i++) { |
6c085a72 CW |
1535 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); |
1536 | if (IS_ERR(page)) { | |
1537 | i915_gem_purge(dev_priv, page_count); | |
1538 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); | |
1539 | } | |
1540 | if (IS_ERR(page)) { | |
1541 | /* We've tried hard to allocate the memory by reaping | |
1542 | * our own buffer, now let the real VM do its job and | |
1543 | * go down in flames if truly OOM. | |
1544 | */ | |
1545 | gfp &= ~(__GFP_NORETRY | __GFP_NOWARN | __GFP_NO_KSWAPD); | |
1546 | gfp |= __GFP_IO | __GFP_WAIT; | |
1547 | ||
1548 | i915_gem_shrink_all(dev_priv); | |
1549 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); | |
1550 | if (IS_ERR(page)) | |
1551 | goto err_pages; | |
1552 | ||
1553 | gfp |= __GFP_NORETRY | __GFP_NOWARN | __GFP_NO_KSWAPD; | |
1554 | gfp &= ~(__GFP_IO | __GFP_WAIT); | |
1555 | } | |
e5281ccd | 1556 | |
05394f39 | 1557 | obj->pages[i] = page; |
e5281ccd CW |
1558 | } |
1559 | ||
6dacfd2f | 1560 | if (i915_gem_object_needs_bit17_swizzle(obj)) |
e5281ccd CW |
1561 | i915_gem_object_do_bit_17_swizzle(obj); |
1562 | ||
6c085a72 | 1563 | list_add_tail(&obj->gtt_list, &dev_priv->mm.unbound_list); |
e5281ccd CW |
1564 | return 0; |
1565 | ||
1566 | err_pages: | |
1567 | while (i--) | |
05394f39 | 1568 | page_cache_release(obj->pages[i]); |
e5281ccd | 1569 | |
05394f39 CW |
1570 | drm_free_large(obj->pages); |
1571 | obj->pages = NULL; | |
e5281ccd CW |
1572 | return PTR_ERR(page); |
1573 | } | |
1574 | ||
54cf91dc | 1575 | void |
05394f39 | 1576 | i915_gem_object_move_to_active(struct drm_i915_gem_object *obj, |
1ec14ad3 CW |
1577 | struct intel_ring_buffer *ring, |
1578 | u32 seqno) | |
673a394b | 1579 | { |
05394f39 | 1580 | struct drm_device *dev = obj->base.dev; |
69dc4987 | 1581 | struct drm_i915_private *dev_priv = dev->dev_private; |
617dbe27 | 1582 | |
852835f3 | 1583 | BUG_ON(ring == NULL); |
05394f39 | 1584 | obj->ring = ring; |
673a394b EA |
1585 | |
1586 | /* Add a reference if we're newly entering the active list. */ | |
05394f39 CW |
1587 | if (!obj->active) { |
1588 | drm_gem_object_reference(&obj->base); | |
1589 | obj->active = 1; | |
673a394b | 1590 | } |
e35a41de | 1591 | |
673a394b | 1592 | /* Move from whatever list we were on to the tail of execution. */ |
05394f39 CW |
1593 | list_move_tail(&obj->mm_list, &dev_priv->mm.active_list); |
1594 | list_move_tail(&obj->ring_list, &ring->active_list); | |
caea7476 | 1595 | |
0201f1ec | 1596 | obj->last_read_seqno = seqno; |
caea7476 | 1597 | |
7dd49065 | 1598 | if (obj->fenced_gpu_access) { |
caea7476 | 1599 | obj->last_fenced_seqno = seqno; |
caea7476 | 1600 | |
7dd49065 CW |
1601 | /* Bump MRU to take account of the delayed flush */ |
1602 | if (obj->fence_reg != I915_FENCE_REG_NONE) { | |
1603 | struct drm_i915_fence_reg *reg; | |
1604 | ||
1605 | reg = &dev_priv->fence_regs[obj->fence_reg]; | |
1606 | list_move_tail(®->lru_list, | |
1607 | &dev_priv->mm.fence_list); | |
1608 | } | |
caea7476 CW |
1609 | } |
1610 | } | |
1611 | ||
caea7476 CW |
1612 | static void |
1613 | i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj) | |
1614 | { | |
1615 | struct drm_device *dev = obj->base.dev; | |
1616 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1617 | ||
65ce3027 | 1618 | BUG_ON(obj->base.write_domain & ~I915_GEM_GPU_DOMAINS); |
caea7476 | 1619 | BUG_ON(!obj->active); |
65ce3027 | 1620 | |
f047e395 CW |
1621 | if (obj->pin_count) /* are we a framebuffer? */ |
1622 | intel_mark_fb_idle(obj); | |
1623 | ||
1624 | list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list); | |
1625 | ||
65ce3027 | 1626 | list_del_init(&obj->ring_list); |
caea7476 CW |
1627 | obj->ring = NULL; |
1628 | ||
65ce3027 CW |
1629 | obj->last_read_seqno = 0; |
1630 | obj->last_write_seqno = 0; | |
1631 | obj->base.write_domain = 0; | |
1632 | ||
1633 | obj->last_fenced_seqno = 0; | |
caea7476 | 1634 | obj->fenced_gpu_access = false; |
caea7476 CW |
1635 | |
1636 | obj->active = 0; | |
1637 | drm_gem_object_unreference(&obj->base); | |
1638 | ||
1639 | WARN_ON(i915_verify_lists(dev)); | |
ce44b0ea | 1640 | } |
673a394b | 1641 | |
53d227f2 DV |
1642 | static u32 |
1643 | i915_gem_get_seqno(struct drm_device *dev) | |
1644 | { | |
1645 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1646 | u32 seqno = dev_priv->next_seqno; | |
1647 | ||
1648 | /* reserve 0 for non-seqno */ | |
1649 | if (++dev_priv->next_seqno == 0) | |
1650 | dev_priv->next_seqno = 1; | |
1651 | ||
1652 | return seqno; | |
1653 | } | |
1654 | ||
1655 | u32 | |
1656 | i915_gem_next_request_seqno(struct intel_ring_buffer *ring) | |
1657 | { | |
1658 | if (ring->outstanding_lazy_request == 0) | |
1659 | ring->outstanding_lazy_request = i915_gem_get_seqno(ring->dev); | |
1660 | ||
1661 | return ring->outstanding_lazy_request; | |
1662 | } | |
1663 | ||
3cce469c | 1664 | int |
db53a302 | 1665 | i915_add_request(struct intel_ring_buffer *ring, |
f787a5f5 | 1666 | struct drm_file *file, |
db53a302 | 1667 | struct drm_i915_gem_request *request) |
673a394b | 1668 | { |
db53a302 | 1669 | drm_i915_private_t *dev_priv = ring->dev->dev_private; |
673a394b | 1670 | uint32_t seqno; |
a71d8d94 | 1671 | u32 request_ring_position; |
673a394b | 1672 | int was_empty; |
3cce469c CW |
1673 | int ret; |
1674 | ||
cc889e0f DV |
1675 | /* |
1676 | * Emit any outstanding flushes - execbuf can fail to emit the flush | |
1677 | * after having emitted the batchbuffer command. Hence we need to fix | |
1678 | * things up similar to emitting the lazy request. The difference here | |
1679 | * is that the flush _must_ happen before the next request, no matter | |
1680 | * what. | |
1681 | */ | |
a7b9761d CW |
1682 | ret = intel_ring_flush_all_caches(ring); |
1683 | if (ret) | |
1684 | return ret; | |
cc889e0f | 1685 | |
3bb73aba CW |
1686 | if (request == NULL) { |
1687 | request = kmalloc(sizeof(*request), GFP_KERNEL); | |
1688 | if (request == NULL) | |
1689 | return -ENOMEM; | |
1690 | } | |
1691 | ||
53d227f2 | 1692 | seqno = i915_gem_next_request_seqno(ring); |
673a394b | 1693 | |
a71d8d94 CW |
1694 | /* Record the position of the start of the request so that |
1695 | * should we detect the updated seqno part-way through the | |
1696 | * GPU processing the request, we never over-estimate the | |
1697 | * position of the head. | |
1698 | */ | |
1699 | request_ring_position = intel_ring_get_tail(ring); | |
1700 | ||
3cce469c | 1701 | ret = ring->add_request(ring, &seqno); |
3bb73aba CW |
1702 | if (ret) { |
1703 | kfree(request); | |
1704 | return ret; | |
1705 | } | |
673a394b | 1706 | |
db53a302 | 1707 | trace_i915_gem_request_add(ring, seqno); |
673a394b EA |
1708 | |
1709 | request->seqno = seqno; | |
852835f3 | 1710 | request->ring = ring; |
a71d8d94 | 1711 | request->tail = request_ring_position; |
673a394b | 1712 | request->emitted_jiffies = jiffies; |
852835f3 ZN |
1713 | was_empty = list_empty(&ring->request_list); |
1714 | list_add_tail(&request->list, &ring->request_list); | |
3bb73aba | 1715 | request->file_priv = NULL; |
852835f3 | 1716 | |
db53a302 CW |
1717 | if (file) { |
1718 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
1719 | ||
1c25595f | 1720 | spin_lock(&file_priv->mm.lock); |
f787a5f5 | 1721 | request->file_priv = file_priv; |
b962442e | 1722 | list_add_tail(&request->client_list, |
f787a5f5 | 1723 | &file_priv->mm.request_list); |
1c25595f | 1724 | spin_unlock(&file_priv->mm.lock); |
b962442e | 1725 | } |
673a394b | 1726 | |
5391d0cf | 1727 | ring->outstanding_lazy_request = 0; |
db53a302 | 1728 | |
f65d9421 | 1729 | if (!dev_priv->mm.suspended) { |
3e0dc6b0 BW |
1730 | if (i915_enable_hangcheck) { |
1731 | mod_timer(&dev_priv->hangcheck_timer, | |
1732 | jiffies + | |
1733 | msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD)); | |
1734 | } | |
f047e395 | 1735 | if (was_empty) { |
b3b079db CW |
1736 | queue_delayed_work(dev_priv->wq, |
1737 | &dev_priv->mm.retire_work, HZ); | |
f047e395 CW |
1738 | intel_mark_busy(dev_priv->dev); |
1739 | } | |
f65d9421 | 1740 | } |
cc889e0f | 1741 | |
3cce469c | 1742 | return 0; |
673a394b EA |
1743 | } |
1744 | ||
f787a5f5 CW |
1745 | static inline void |
1746 | i915_gem_request_remove_from_client(struct drm_i915_gem_request *request) | |
673a394b | 1747 | { |
1c25595f | 1748 | struct drm_i915_file_private *file_priv = request->file_priv; |
673a394b | 1749 | |
1c25595f CW |
1750 | if (!file_priv) |
1751 | return; | |
1c5d22f7 | 1752 | |
1c25595f | 1753 | spin_lock(&file_priv->mm.lock); |
09bfa517 HRK |
1754 | if (request->file_priv) { |
1755 | list_del(&request->client_list); | |
1756 | request->file_priv = NULL; | |
1757 | } | |
1c25595f | 1758 | spin_unlock(&file_priv->mm.lock); |
673a394b | 1759 | } |
673a394b | 1760 | |
dfaae392 CW |
1761 | static void i915_gem_reset_ring_lists(struct drm_i915_private *dev_priv, |
1762 | struct intel_ring_buffer *ring) | |
9375e446 | 1763 | { |
dfaae392 CW |
1764 | while (!list_empty(&ring->request_list)) { |
1765 | struct drm_i915_gem_request *request; | |
673a394b | 1766 | |
dfaae392 CW |
1767 | request = list_first_entry(&ring->request_list, |
1768 | struct drm_i915_gem_request, | |
1769 | list); | |
de151cf6 | 1770 | |
dfaae392 | 1771 | list_del(&request->list); |
f787a5f5 | 1772 | i915_gem_request_remove_from_client(request); |
dfaae392 CW |
1773 | kfree(request); |
1774 | } | |
673a394b | 1775 | |
dfaae392 | 1776 | while (!list_empty(&ring->active_list)) { |
05394f39 | 1777 | struct drm_i915_gem_object *obj; |
9375e446 | 1778 | |
05394f39 CW |
1779 | obj = list_first_entry(&ring->active_list, |
1780 | struct drm_i915_gem_object, | |
1781 | ring_list); | |
9375e446 | 1782 | |
05394f39 | 1783 | i915_gem_object_move_to_inactive(obj); |
673a394b EA |
1784 | } |
1785 | } | |
1786 | ||
312817a3 CW |
1787 | static void i915_gem_reset_fences(struct drm_device *dev) |
1788 | { | |
1789 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1790 | int i; | |
1791 | ||
4b9de737 | 1792 | for (i = 0; i < dev_priv->num_fence_regs; i++) { |
312817a3 | 1793 | struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i]; |
7d2cb39c | 1794 | |
ada726c7 | 1795 | i915_gem_write_fence(dev, i, NULL); |
7d2cb39c | 1796 | |
ada726c7 CW |
1797 | if (reg->obj) |
1798 | i915_gem_object_fence_lost(reg->obj); | |
7d2cb39c | 1799 | |
ada726c7 CW |
1800 | reg->pin_count = 0; |
1801 | reg->obj = NULL; | |
1802 | INIT_LIST_HEAD(®->lru_list); | |
312817a3 | 1803 | } |
ada726c7 CW |
1804 | |
1805 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); | |
312817a3 CW |
1806 | } |
1807 | ||
069efc1d | 1808 | void i915_gem_reset(struct drm_device *dev) |
673a394b | 1809 | { |
77f01230 | 1810 | struct drm_i915_private *dev_priv = dev->dev_private; |
05394f39 | 1811 | struct drm_i915_gem_object *obj; |
b4519513 | 1812 | struct intel_ring_buffer *ring; |
1ec14ad3 | 1813 | int i; |
673a394b | 1814 | |
b4519513 CW |
1815 | for_each_ring(ring, dev_priv, i) |
1816 | i915_gem_reset_ring_lists(dev_priv, ring); | |
dfaae392 | 1817 | |
dfaae392 CW |
1818 | /* Move everything out of the GPU domains to ensure we do any |
1819 | * necessary invalidation upon reuse. | |
1820 | */ | |
05394f39 | 1821 | list_for_each_entry(obj, |
77f01230 | 1822 | &dev_priv->mm.inactive_list, |
69dc4987 | 1823 | mm_list) |
77f01230 | 1824 | { |
05394f39 | 1825 | obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS; |
77f01230 | 1826 | } |
069efc1d | 1827 | |
6c085a72 | 1828 | |
069efc1d | 1829 | /* The fence registers are invalidated so clear them out */ |
312817a3 | 1830 | i915_gem_reset_fences(dev); |
673a394b EA |
1831 | } |
1832 | ||
1833 | /** | |
1834 | * This function clears the request list as sequence numbers are passed. | |
1835 | */ | |
a71d8d94 | 1836 | void |
db53a302 | 1837 | i915_gem_retire_requests_ring(struct intel_ring_buffer *ring) |
673a394b | 1838 | { |
673a394b | 1839 | uint32_t seqno; |
1ec14ad3 | 1840 | int i; |
673a394b | 1841 | |
db53a302 | 1842 | if (list_empty(&ring->request_list)) |
6c0594a3 KW |
1843 | return; |
1844 | ||
db53a302 | 1845 | WARN_ON(i915_verify_lists(ring->dev)); |
673a394b | 1846 | |
b2eadbc8 | 1847 | seqno = ring->get_seqno(ring, true); |
1ec14ad3 | 1848 | |
076e2c0e | 1849 | for (i = 0; i < ARRAY_SIZE(ring->sync_seqno); i++) |
1ec14ad3 CW |
1850 | if (seqno >= ring->sync_seqno[i]) |
1851 | ring->sync_seqno[i] = 0; | |
1852 | ||
852835f3 | 1853 | while (!list_empty(&ring->request_list)) { |
673a394b | 1854 | struct drm_i915_gem_request *request; |
673a394b | 1855 | |
852835f3 | 1856 | request = list_first_entry(&ring->request_list, |
673a394b EA |
1857 | struct drm_i915_gem_request, |
1858 | list); | |
673a394b | 1859 | |
dfaae392 | 1860 | if (!i915_seqno_passed(seqno, request->seqno)) |
b84d5f0c CW |
1861 | break; |
1862 | ||
db53a302 | 1863 | trace_i915_gem_request_retire(ring, request->seqno); |
a71d8d94 CW |
1864 | /* We know the GPU must have read the request to have |
1865 | * sent us the seqno + interrupt, so use the position | |
1866 | * of tail of the request to update the last known position | |
1867 | * of the GPU head. | |
1868 | */ | |
1869 | ring->last_retired_head = request->tail; | |
b84d5f0c CW |
1870 | |
1871 | list_del(&request->list); | |
f787a5f5 | 1872 | i915_gem_request_remove_from_client(request); |
b84d5f0c CW |
1873 | kfree(request); |
1874 | } | |
673a394b | 1875 | |
b84d5f0c CW |
1876 | /* Move any buffers on the active list that are no longer referenced |
1877 | * by the ringbuffer to the flushing/inactive lists as appropriate. | |
1878 | */ | |
1879 | while (!list_empty(&ring->active_list)) { | |
05394f39 | 1880 | struct drm_i915_gem_object *obj; |
b84d5f0c | 1881 | |
0206e353 | 1882 | obj = list_first_entry(&ring->active_list, |
05394f39 CW |
1883 | struct drm_i915_gem_object, |
1884 | ring_list); | |
673a394b | 1885 | |
0201f1ec | 1886 | if (!i915_seqno_passed(seqno, obj->last_read_seqno)) |
673a394b | 1887 | break; |
b84d5f0c | 1888 | |
65ce3027 | 1889 | i915_gem_object_move_to_inactive(obj); |
673a394b | 1890 | } |
9d34e5db | 1891 | |
db53a302 CW |
1892 | if (unlikely(ring->trace_irq_seqno && |
1893 | i915_seqno_passed(seqno, ring->trace_irq_seqno))) { | |
1ec14ad3 | 1894 | ring->irq_put(ring); |
db53a302 | 1895 | ring->trace_irq_seqno = 0; |
9d34e5db | 1896 | } |
23bc5982 | 1897 | |
db53a302 | 1898 | WARN_ON(i915_verify_lists(ring->dev)); |
673a394b EA |
1899 | } |
1900 | ||
b09a1fec CW |
1901 | void |
1902 | i915_gem_retire_requests(struct drm_device *dev) | |
1903 | { | |
1904 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b4519513 | 1905 | struct intel_ring_buffer *ring; |
1ec14ad3 | 1906 | int i; |
b09a1fec | 1907 | |
b4519513 CW |
1908 | for_each_ring(ring, dev_priv, i) |
1909 | i915_gem_retire_requests_ring(ring); | |
b09a1fec CW |
1910 | } |
1911 | ||
75ef9da2 | 1912 | static void |
673a394b EA |
1913 | i915_gem_retire_work_handler(struct work_struct *work) |
1914 | { | |
1915 | drm_i915_private_t *dev_priv; | |
1916 | struct drm_device *dev; | |
b4519513 | 1917 | struct intel_ring_buffer *ring; |
0a58705b CW |
1918 | bool idle; |
1919 | int i; | |
673a394b EA |
1920 | |
1921 | dev_priv = container_of(work, drm_i915_private_t, | |
1922 | mm.retire_work.work); | |
1923 | dev = dev_priv->dev; | |
1924 | ||
891b48cf CW |
1925 | /* Come back later if the device is busy... */ |
1926 | if (!mutex_trylock(&dev->struct_mutex)) { | |
1927 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); | |
1928 | return; | |
1929 | } | |
1930 | ||
b09a1fec | 1931 | i915_gem_retire_requests(dev); |
d1b851fc | 1932 | |
0a58705b CW |
1933 | /* Send a periodic flush down the ring so we don't hold onto GEM |
1934 | * objects indefinitely. | |
1935 | */ | |
1936 | idle = true; | |
b4519513 | 1937 | for_each_ring(ring, dev_priv, i) { |
3bb73aba CW |
1938 | if (ring->gpu_caches_dirty) |
1939 | i915_add_request(ring, NULL, NULL); | |
0a58705b CW |
1940 | |
1941 | idle &= list_empty(&ring->request_list); | |
1942 | } | |
1943 | ||
1944 | if (!dev_priv->mm.suspended && !idle) | |
9c9fe1f8 | 1945 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); |
f047e395 CW |
1946 | if (idle) |
1947 | intel_mark_idle(dev); | |
0a58705b | 1948 | |
673a394b EA |
1949 | mutex_unlock(&dev->struct_mutex); |
1950 | } | |
1951 | ||
d6b2c790 DV |
1952 | int |
1953 | i915_gem_check_wedge(struct drm_i915_private *dev_priv, | |
1954 | bool interruptible) | |
b4aca010 | 1955 | { |
b4aca010 BW |
1956 | if (atomic_read(&dev_priv->mm.wedged)) { |
1957 | struct completion *x = &dev_priv->error_completion; | |
1958 | bool recovery_complete; | |
1959 | unsigned long flags; | |
1960 | ||
1961 | /* Give the error handler a chance to run. */ | |
1962 | spin_lock_irqsave(&x->wait.lock, flags); | |
1963 | recovery_complete = x->done > 0; | |
1964 | spin_unlock_irqrestore(&x->wait.lock, flags); | |
1965 | ||
d6b2c790 DV |
1966 | /* Non-interruptible callers can't handle -EAGAIN, hence return |
1967 | * -EIO unconditionally for these. */ | |
1968 | if (!interruptible) | |
1969 | return -EIO; | |
1970 | ||
1971 | /* Recovery complete, but still wedged means reset failure. */ | |
1972 | if (recovery_complete) | |
1973 | return -EIO; | |
1974 | ||
1975 | return -EAGAIN; | |
b4aca010 BW |
1976 | } |
1977 | ||
1978 | return 0; | |
1979 | } | |
1980 | ||
1981 | /* | |
1982 | * Compare seqno against outstanding lazy request. Emit a request if they are | |
1983 | * equal. | |
1984 | */ | |
1985 | static int | |
1986 | i915_gem_check_olr(struct intel_ring_buffer *ring, u32 seqno) | |
1987 | { | |
3bb73aba | 1988 | int ret; |
b4aca010 BW |
1989 | |
1990 | BUG_ON(!mutex_is_locked(&ring->dev->struct_mutex)); | |
1991 | ||
3bb73aba CW |
1992 | ret = 0; |
1993 | if (seqno == ring->outstanding_lazy_request) | |
1994 | ret = i915_add_request(ring, NULL, NULL); | |
b4aca010 BW |
1995 | |
1996 | return ret; | |
1997 | } | |
1998 | ||
5c81fe85 BW |
1999 | /** |
2000 | * __wait_seqno - wait until execution of seqno has finished | |
2001 | * @ring: the ring expected to report seqno | |
2002 | * @seqno: duh! | |
2003 | * @interruptible: do an interruptible wait (normally yes) | |
2004 | * @timeout: in - how long to wait (NULL forever); out - how much time remaining | |
2005 | * | |
2006 | * Returns 0 if the seqno was found within the alloted time. Else returns the | |
2007 | * errno with remaining time filled in timeout argument. | |
2008 | */ | |
604dd3ec | 2009 | static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno, |
5c81fe85 | 2010 | bool interruptible, struct timespec *timeout) |
604dd3ec BW |
2011 | { |
2012 | drm_i915_private_t *dev_priv = ring->dev->dev_private; | |
5c81fe85 BW |
2013 | struct timespec before, now, wait_time={1,0}; |
2014 | unsigned long timeout_jiffies; | |
2015 | long end; | |
2016 | bool wait_forever = true; | |
d6b2c790 | 2017 | int ret; |
604dd3ec | 2018 | |
b2eadbc8 | 2019 | if (i915_seqno_passed(ring->get_seqno(ring, true), seqno)) |
604dd3ec BW |
2020 | return 0; |
2021 | ||
2022 | trace_i915_gem_request_wait_begin(ring, seqno); | |
5c81fe85 BW |
2023 | |
2024 | if (timeout != NULL) { | |
2025 | wait_time = *timeout; | |
2026 | wait_forever = false; | |
2027 | } | |
2028 | ||
2029 | timeout_jiffies = timespec_to_jiffies(&wait_time); | |
2030 | ||
604dd3ec BW |
2031 | if (WARN_ON(!ring->irq_get(ring))) |
2032 | return -ENODEV; | |
2033 | ||
5c81fe85 BW |
2034 | /* Record current time in case interrupted by signal, or wedged * */ |
2035 | getrawmonotonic(&before); | |
2036 | ||
604dd3ec | 2037 | #define EXIT_COND \ |
b2eadbc8 | 2038 | (i915_seqno_passed(ring->get_seqno(ring, false), seqno) || \ |
604dd3ec | 2039 | atomic_read(&dev_priv->mm.wedged)) |
5c81fe85 BW |
2040 | do { |
2041 | if (interruptible) | |
2042 | end = wait_event_interruptible_timeout(ring->irq_queue, | |
2043 | EXIT_COND, | |
2044 | timeout_jiffies); | |
2045 | else | |
2046 | end = wait_event_timeout(ring->irq_queue, EXIT_COND, | |
2047 | timeout_jiffies); | |
604dd3ec | 2048 | |
d6b2c790 DV |
2049 | ret = i915_gem_check_wedge(dev_priv, interruptible); |
2050 | if (ret) | |
2051 | end = ret; | |
5c81fe85 BW |
2052 | } while (end == 0 && wait_forever); |
2053 | ||
2054 | getrawmonotonic(&now); | |
604dd3ec BW |
2055 | |
2056 | ring->irq_put(ring); | |
2057 | trace_i915_gem_request_wait_end(ring, seqno); | |
2058 | #undef EXIT_COND | |
2059 | ||
5c81fe85 BW |
2060 | if (timeout) { |
2061 | struct timespec sleep_time = timespec_sub(now, before); | |
2062 | *timeout = timespec_sub(*timeout, sleep_time); | |
2063 | } | |
2064 | ||
2065 | switch (end) { | |
eeef9b38 | 2066 | case -EIO: |
5c81fe85 BW |
2067 | case -EAGAIN: /* Wedged */ |
2068 | case -ERESTARTSYS: /* Signal */ | |
2069 | return (int)end; | |
2070 | case 0: /* Timeout */ | |
2071 | if (timeout) | |
2072 | set_normalized_timespec(timeout, 0, 0); | |
2073 | return -ETIME; | |
2074 | default: /* Completed */ | |
2075 | WARN_ON(end < 0); /* We're not aware of other errors */ | |
2076 | return 0; | |
2077 | } | |
604dd3ec BW |
2078 | } |
2079 | ||
db53a302 CW |
2080 | /** |
2081 | * Waits for a sequence number to be signaled, and cleans up the | |
2082 | * request and object lists appropriately for that event. | |
2083 | */ | |
5a5a0c64 | 2084 | int |
199b2bc2 | 2085 | i915_wait_seqno(struct intel_ring_buffer *ring, uint32_t seqno) |
673a394b | 2086 | { |
db53a302 | 2087 | drm_i915_private_t *dev_priv = ring->dev->dev_private; |
673a394b EA |
2088 | int ret = 0; |
2089 | ||
2090 | BUG_ON(seqno == 0); | |
2091 | ||
d6b2c790 | 2092 | ret = i915_gem_check_wedge(dev_priv, dev_priv->mm.interruptible); |
b4aca010 BW |
2093 | if (ret) |
2094 | return ret; | |
3cce469c | 2095 | |
b4aca010 BW |
2096 | ret = i915_gem_check_olr(ring, seqno); |
2097 | if (ret) | |
2098 | return ret; | |
ffed1d09 | 2099 | |
5c81fe85 | 2100 | ret = __wait_seqno(ring, seqno, dev_priv->mm.interruptible, NULL); |
673a394b | 2101 | |
673a394b EA |
2102 | return ret; |
2103 | } | |
2104 | ||
673a394b EA |
2105 | /** |
2106 | * Ensures that all rendering to the object has completed and the object is | |
2107 | * safe to unbind from the GTT or access from the CPU. | |
2108 | */ | |
0201f1ec CW |
2109 | static __must_check int |
2110 | i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj, | |
2111 | bool readonly) | |
673a394b | 2112 | { |
0201f1ec | 2113 | u32 seqno; |
673a394b EA |
2114 | int ret; |
2115 | ||
673a394b EA |
2116 | /* If there is rendering queued on the buffer being evicted, wait for |
2117 | * it. | |
2118 | */ | |
0201f1ec CW |
2119 | if (readonly) |
2120 | seqno = obj->last_write_seqno; | |
2121 | else | |
2122 | seqno = obj->last_read_seqno; | |
2123 | if (seqno == 0) | |
2124 | return 0; | |
2125 | ||
2126 | ret = i915_wait_seqno(obj->ring, seqno); | |
2127 | if (ret) | |
2128 | return ret; | |
2129 | ||
2130 | /* Manually manage the write flush as we may have not yet retired | |
2131 | * the buffer. | |
2132 | */ | |
2133 | if (obj->last_write_seqno && | |
2134 | i915_seqno_passed(seqno, obj->last_write_seqno)) { | |
2135 | obj->last_write_seqno = 0; | |
2136 | obj->base.write_domain &= ~I915_GEM_GPU_DOMAINS; | |
673a394b EA |
2137 | } |
2138 | ||
0201f1ec | 2139 | i915_gem_retire_requests_ring(obj->ring); |
673a394b EA |
2140 | return 0; |
2141 | } | |
2142 | ||
30dfebf3 DV |
2143 | /** |
2144 | * Ensures that an object will eventually get non-busy by flushing any required | |
2145 | * write domains, emitting any outstanding lazy request and retiring and | |
2146 | * completed requests. | |
2147 | */ | |
2148 | static int | |
2149 | i915_gem_object_flush_active(struct drm_i915_gem_object *obj) | |
2150 | { | |
2151 | int ret; | |
2152 | ||
2153 | if (obj->active) { | |
0201f1ec | 2154 | ret = i915_gem_check_olr(obj->ring, obj->last_read_seqno); |
30dfebf3 DV |
2155 | if (ret) |
2156 | return ret; | |
0201f1ec | 2157 | |
30dfebf3 DV |
2158 | i915_gem_retire_requests_ring(obj->ring); |
2159 | } | |
2160 | ||
2161 | return 0; | |
2162 | } | |
2163 | ||
23ba4fd0 BW |
2164 | /** |
2165 | * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT | |
2166 | * @DRM_IOCTL_ARGS: standard ioctl arguments | |
2167 | * | |
2168 | * Returns 0 if successful, else an error is returned with the remaining time in | |
2169 | * the timeout parameter. | |
2170 | * -ETIME: object is still busy after timeout | |
2171 | * -ERESTARTSYS: signal interrupted the wait | |
2172 | * -ENONENT: object doesn't exist | |
2173 | * Also possible, but rare: | |
2174 | * -EAGAIN: GPU wedged | |
2175 | * -ENOMEM: damn | |
2176 | * -ENODEV: Internal IRQ fail | |
2177 | * -E?: The add request failed | |
2178 | * | |
2179 | * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any | |
2180 | * non-zero timeout parameter the wait ioctl will wait for the given number of | |
2181 | * nanoseconds on an object becoming unbusy. Since the wait itself does so | |
2182 | * without holding struct_mutex the object may become re-busied before this | |
2183 | * function completes. A similar but shorter * race condition exists in the busy | |
2184 | * ioctl | |
2185 | */ | |
2186 | int | |
2187 | i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) | |
2188 | { | |
2189 | struct drm_i915_gem_wait *args = data; | |
2190 | struct drm_i915_gem_object *obj; | |
2191 | struct intel_ring_buffer *ring = NULL; | |
eac1f14f | 2192 | struct timespec timeout_stack, *timeout = NULL; |
23ba4fd0 BW |
2193 | u32 seqno = 0; |
2194 | int ret = 0; | |
2195 | ||
eac1f14f BW |
2196 | if (args->timeout_ns >= 0) { |
2197 | timeout_stack = ns_to_timespec(args->timeout_ns); | |
2198 | timeout = &timeout_stack; | |
2199 | } | |
23ba4fd0 BW |
2200 | |
2201 | ret = i915_mutex_lock_interruptible(dev); | |
2202 | if (ret) | |
2203 | return ret; | |
2204 | ||
2205 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->bo_handle)); | |
2206 | if (&obj->base == NULL) { | |
2207 | mutex_unlock(&dev->struct_mutex); | |
2208 | return -ENOENT; | |
2209 | } | |
2210 | ||
30dfebf3 DV |
2211 | /* Need to make sure the object gets inactive eventually. */ |
2212 | ret = i915_gem_object_flush_active(obj); | |
23ba4fd0 BW |
2213 | if (ret) |
2214 | goto out; | |
2215 | ||
2216 | if (obj->active) { | |
0201f1ec | 2217 | seqno = obj->last_read_seqno; |
23ba4fd0 BW |
2218 | ring = obj->ring; |
2219 | } | |
2220 | ||
2221 | if (seqno == 0) | |
2222 | goto out; | |
2223 | ||
23ba4fd0 BW |
2224 | /* Do this after OLR check to make sure we make forward progress polling |
2225 | * on this IOCTL with a 0 timeout (like busy ioctl) | |
2226 | */ | |
2227 | if (!args->timeout_ns) { | |
2228 | ret = -ETIME; | |
2229 | goto out; | |
2230 | } | |
2231 | ||
2232 | drm_gem_object_unreference(&obj->base); | |
2233 | mutex_unlock(&dev->struct_mutex); | |
2234 | ||
eac1f14f BW |
2235 | ret = __wait_seqno(ring, seqno, true, timeout); |
2236 | if (timeout) { | |
2237 | WARN_ON(!timespec_valid(timeout)); | |
2238 | args->timeout_ns = timespec_to_ns(timeout); | |
2239 | } | |
23ba4fd0 BW |
2240 | return ret; |
2241 | ||
2242 | out: | |
2243 | drm_gem_object_unreference(&obj->base); | |
2244 | mutex_unlock(&dev->struct_mutex); | |
2245 | return ret; | |
2246 | } | |
2247 | ||
5816d648 BW |
2248 | /** |
2249 | * i915_gem_object_sync - sync an object to a ring. | |
2250 | * | |
2251 | * @obj: object which may be in use on another ring. | |
2252 | * @to: ring we wish to use the object on. May be NULL. | |
2253 | * | |
2254 | * This code is meant to abstract object synchronization with the GPU. | |
2255 | * Calling with NULL implies synchronizing the object with the CPU | |
2256 | * rather than a particular GPU ring. | |
2257 | * | |
2258 | * Returns 0 if successful, else propagates up the lower layer error. | |
2259 | */ | |
2911a35b BW |
2260 | int |
2261 | i915_gem_object_sync(struct drm_i915_gem_object *obj, | |
2262 | struct intel_ring_buffer *to) | |
2263 | { | |
2264 | struct intel_ring_buffer *from = obj->ring; | |
2265 | u32 seqno; | |
2266 | int ret, idx; | |
2267 | ||
2268 | if (from == NULL || to == from) | |
2269 | return 0; | |
2270 | ||
5816d648 | 2271 | if (to == NULL || !i915_semaphore_is_enabled(obj->base.dev)) |
0201f1ec | 2272 | return i915_gem_object_wait_rendering(obj, false); |
2911a35b BW |
2273 | |
2274 | idx = intel_ring_sync_index(from, to); | |
2275 | ||
0201f1ec | 2276 | seqno = obj->last_read_seqno; |
2911a35b BW |
2277 | if (seqno <= from->sync_seqno[idx]) |
2278 | return 0; | |
2279 | ||
b4aca010 BW |
2280 | ret = i915_gem_check_olr(obj->ring, seqno); |
2281 | if (ret) | |
2282 | return ret; | |
2911a35b | 2283 | |
1500f7ea | 2284 | ret = to->sync_to(to, from, seqno); |
e3a5a225 BW |
2285 | if (!ret) |
2286 | from->sync_seqno[idx] = seqno; | |
2911a35b | 2287 | |
e3a5a225 | 2288 | return ret; |
2911a35b BW |
2289 | } |
2290 | ||
b5ffc9bc CW |
2291 | static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj) |
2292 | { | |
2293 | u32 old_write_domain, old_read_domains; | |
2294 | ||
b5ffc9bc CW |
2295 | /* Act a barrier for all accesses through the GTT */ |
2296 | mb(); | |
2297 | ||
2298 | /* Force a pagefault for domain tracking on next user access */ | |
2299 | i915_gem_release_mmap(obj); | |
2300 | ||
b97c3d9c KP |
2301 | if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) |
2302 | return; | |
2303 | ||
b5ffc9bc CW |
2304 | old_read_domains = obj->base.read_domains; |
2305 | old_write_domain = obj->base.write_domain; | |
2306 | ||
2307 | obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT; | |
2308 | obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT; | |
2309 | ||
2310 | trace_i915_gem_object_change_domain(obj, | |
2311 | old_read_domains, | |
2312 | old_write_domain); | |
2313 | } | |
2314 | ||
673a394b EA |
2315 | /** |
2316 | * Unbinds an object from the GTT aperture. | |
2317 | */ | |
0f973f27 | 2318 | int |
05394f39 | 2319 | i915_gem_object_unbind(struct drm_i915_gem_object *obj) |
673a394b | 2320 | { |
7bddb01f | 2321 | drm_i915_private_t *dev_priv = obj->base.dev->dev_private; |
673a394b EA |
2322 | int ret = 0; |
2323 | ||
05394f39 | 2324 | if (obj->gtt_space == NULL) |
673a394b EA |
2325 | return 0; |
2326 | ||
31d8d651 CW |
2327 | if (obj->pin_count) |
2328 | return -EBUSY; | |
673a394b | 2329 | |
c4670ad0 CW |
2330 | BUG_ON(obj->pages == NULL); |
2331 | ||
a8198eea | 2332 | ret = i915_gem_object_finish_gpu(obj); |
1488fc08 | 2333 | if (ret) |
a8198eea CW |
2334 | return ret; |
2335 | /* Continue on if we fail due to EIO, the GPU is hung so we | |
2336 | * should be safe and we need to cleanup or else we might | |
2337 | * cause memory corruption through use-after-free. | |
2338 | */ | |
2339 | ||
b5ffc9bc | 2340 | i915_gem_object_finish_gtt(obj); |
5323fd04 | 2341 | |
96b47b65 | 2342 | /* release the fence reg _after_ flushing */ |
d9e86c0e | 2343 | ret = i915_gem_object_put_fence(obj); |
1488fc08 | 2344 | if (ret) |
d9e86c0e | 2345 | return ret; |
96b47b65 | 2346 | |
db53a302 CW |
2347 | trace_i915_gem_object_unbind(obj); |
2348 | ||
74898d7e DV |
2349 | if (obj->has_global_gtt_mapping) |
2350 | i915_gem_gtt_unbind_object(obj); | |
7bddb01f DV |
2351 | if (obj->has_aliasing_ppgtt_mapping) { |
2352 | i915_ppgtt_unbind_object(dev_priv->mm.aliasing_ppgtt, obj); | |
2353 | obj->has_aliasing_ppgtt_mapping = 0; | |
2354 | } | |
74163907 | 2355 | i915_gem_gtt_finish_object(obj); |
7bddb01f | 2356 | |
6c085a72 CW |
2357 | list_del(&obj->mm_list); |
2358 | list_move_tail(&obj->gtt_list, &dev_priv->mm.unbound_list); | |
75e9e915 | 2359 | /* Avoid an unnecessary call to unbind on rebind. */ |
05394f39 | 2360 | obj->map_and_fenceable = true; |
673a394b | 2361 | |
05394f39 CW |
2362 | drm_mm_put_block(obj->gtt_space); |
2363 | obj->gtt_space = NULL; | |
2364 | obj->gtt_offset = 0; | |
673a394b | 2365 | |
6c085a72 | 2366 | return 0; |
673a394b EA |
2367 | } |
2368 | ||
b2da9fe5 | 2369 | static int i915_ring_idle(struct intel_ring_buffer *ring) |
a56ba56c | 2370 | { |
69c2fc89 | 2371 | if (list_empty(&ring->active_list)) |
64193406 CW |
2372 | return 0; |
2373 | ||
199b2bc2 | 2374 | return i915_wait_seqno(ring, i915_gem_next_request_seqno(ring)); |
a56ba56c CW |
2375 | } |
2376 | ||
b2da9fe5 | 2377 | int i915_gpu_idle(struct drm_device *dev) |
4df2faf4 DV |
2378 | { |
2379 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b4519513 | 2380 | struct intel_ring_buffer *ring; |
1ec14ad3 | 2381 | int ret, i; |
4df2faf4 | 2382 | |
4df2faf4 | 2383 | /* Flush everything onto the inactive list. */ |
b4519513 CW |
2384 | for_each_ring(ring, dev_priv, i) { |
2385 | ret = i915_ring_idle(ring); | |
1ec14ad3 CW |
2386 | if (ret) |
2387 | return ret; | |
b4519513 | 2388 | |
f2ef6eb1 BW |
2389 | ret = i915_switch_context(ring, NULL, DEFAULT_CONTEXT_ID); |
2390 | if (ret) | |
2391 | return ret; | |
1ec14ad3 | 2392 | } |
4df2faf4 | 2393 | |
8a1a49f9 | 2394 | return 0; |
4df2faf4 DV |
2395 | } |
2396 | ||
9ce079e4 CW |
2397 | static void sandybridge_write_fence_reg(struct drm_device *dev, int reg, |
2398 | struct drm_i915_gem_object *obj) | |
4e901fdc | 2399 | { |
4e901fdc | 2400 | drm_i915_private_t *dev_priv = dev->dev_private; |
4e901fdc EA |
2401 | uint64_t val; |
2402 | ||
9ce079e4 CW |
2403 | if (obj) { |
2404 | u32 size = obj->gtt_space->size; | |
4e901fdc | 2405 | |
9ce079e4 CW |
2406 | val = (uint64_t)((obj->gtt_offset + size - 4096) & |
2407 | 0xfffff000) << 32; | |
2408 | val |= obj->gtt_offset & 0xfffff000; | |
2409 | val |= (uint64_t)((obj->stride / 128) - 1) << | |
2410 | SANDYBRIDGE_FENCE_PITCH_SHIFT; | |
4e901fdc | 2411 | |
9ce079e4 CW |
2412 | if (obj->tiling_mode == I915_TILING_Y) |
2413 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; | |
2414 | val |= I965_FENCE_REG_VALID; | |
2415 | } else | |
2416 | val = 0; | |
c6642782 | 2417 | |
9ce079e4 CW |
2418 | I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + reg * 8, val); |
2419 | POSTING_READ(FENCE_REG_SANDYBRIDGE_0 + reg * 8); | |
4e901fdc EA |
2420 | } |
2421 | ||
9ce079e4 CW |
2422 | static void i965_write_fence_reg(struct drm_device *dev, int reg, |
2423 | struct drm_i915_gem_object *obj) | |
de151cf6 | 2424 | { |
de151cf6 | 2425 | drm_i915_private_t *dev_priv = dev->dev_private; |
de151cf6 JB |
2426 | uint64_t val; |
2427 | ||
9ce079e4 CW |
2428 | if (obj) { |
2429 | u32 size = obj->gtt_space->size; | |
de151cf6 | 2430 | |
9ce079e4 CW |
2431 | val = (uint64_t)((obj->gtt_offset + size - 4096) & |
2432 | 0xfffff000) << 32; | |
2433 | val |= obj->gtt_offset & 0xfffff000; | |
2434 | val |= ((obj->stride / 128) - 1) << I965_FENCE_PITCH_SHIFT; | |
2435 | if (obj->tiling_mode == I915_TILING_Y) | |
2436 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; | |
2437 | val |= I965_FENCE_REG_VALID; | |
2438 | } else | |
2439 | val = 0; | |
c6642782 | 2440 | |
9ce079e4 CW |
2441 | I915_WRITE64(FENCE_REG_965_0 + reg * 8, val); |
2442 | POSTING_READ(FENCE_REG_965_0 + reg * 8); | |
de151cf6 JB |
2443 | } |
2444 | ||
9ce079e4 CW |
2445 | static void i915_write_fence_reg(struct drm_device *dev, int reg, |
2446 | struct drm_i915_gem_object *obj) | |
de151cf6 | 2447 | { |
de151cf6 | 2448 | drm_i915_private_t *dev_priv = dev->dev_private; |
9ce079e4 | 2449 | u32 val; |
de151cf6 | 2450 | |
9ce079e4 CW |
2451 | if (obj) { |
2452 | u32 size = obj->gtt_space->size; | |
2453 | int pitch_val; | |
2454 | int tile_width; | |
c6642782 | 2455 | |
9ce079e4 CW |
2456 | WARN((obj->gtt_offset & ~I915_FENCE_START_MASK) || |
2457 | (size & -size) != size || | |
2458 | (obj->gtt_offset & (size - 1)), | |
2459 | "object 0x%08x [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n", | |
2460 | obj->gtt_offset, obj->map_and_fenceable, size); | |
c6642782 | 2461 | |
9ce079e4 CW |
2462 | if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev)) |
2463 | tile_width = 128; | |
2464 | else | |
2465 | tile_width = 512; | |
2466 | ||
2467 | /* Note: pitch better be a power of two tile widths */ | |
2468 | pitch_val = obj->stride / tile_width; | |
2469 | pitch_val = ffs(pitch_val) - 1; | |
2470 | ||
2471 | val = obj->gtt_offset; | |
2472 | if (obj->tiling_mode == I915_TILING_Y) | |
2473 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
2474 | val |= I915_FENCE_SIZE_BITS(size); | |
2475 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
2476 | val |= I830_FENCE_REG_VALID; | |
2477 | } else | |
2478 | val = 0; | |
2479 | ||
2480 | if (reg < 8) | |
2481 | reg = FENCE_REG_830_0 + reg * 4; | |
2482 | else | |
2483 | reg = FENCE_REG_945_8 + (reg - 8) * 4; | |
2484 | ||
2485 | I915_WRITE(reg, val); | |
2486 | POSTING_READ(reg); | |
de151cf6 JB |
2487 | } |
2488 | ||
9ce079e4 CW |
2489 | static void i830_write_fence_reg(struct drm_device *dev, int reg, |
2490 | struct drm_i915_gem_object *obj) | |
de151cf6 | 2491 | { |
de151cf6 | 2492 | drm_i915_private_t *dev_priv = dev->dev_private; |
de151cf6 | 2493 | uint32_t val; |
de151cf6 | 2494 | |
9ce079e4 CW |
2495 | if (obj) { |
2496 | u32 size = obj->gtt_space->size; | |
2497 | uint32_t pitch_val; | |
de151cf6 | 2498 | |
9ce079e4 CW |
2499 | WARN((obj->gtt_offset & ~I830_FENCE_START_MASK) || |
2500 | (size & -size) != size || | |
2501 | (obj->gtt_offset & (size - 1)), | |
2502 | "object 0x%08x not 512K or pot-size 0x%08x aligned\n", | |
2503 | obj->gtt_offset, size); | |
e76a16de | 2504 | |
9ce079e4 CW |
2505 | pitch_val = obj->stride / 128; |
2506 | pitch_val = ffs(pitch_val) - 1; | |
de151cf6 | 2507 | |
9ce079e4 CW |
2508 | val = obj->gtt_offset; |
2509 | if (obj->tiling_mode == I915_TILING_Y) | |
2510 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
2511 | val |= I830_FENCE_SIZE_BITS(size); | |
2512 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
2513 | val |= I830_FENCE_REG_VALID; | |
2514 | } else | |
2515 | val = 0; | |
c6642782 | 2516 | |
9ce079e4 CW |
2517 | I915_WRITE(FENCE_REG_830_0 + reg * 4, val); |
2518 | POSTING_READ(FENCE_REG_830_0 + reg * 4); | |
2519 | } | |
2520 | ||
2521 | static void i915_gem_write_fence(struct drm_device *dev, int reg, | |
2522 | struct drm_i915_gem_object *obj) | |
2523 | { | |
2524 | switch (INTEL_INFO(dev)->gen) { | |
2525 | case 7: | |
2526 | case 6: sandybridge_write_fence_reg(dev, reg, obj); break; | |
2527 | case 5: | |
2528 | case 4: i965_write_fence_reg(dev, reg, obj); break; | |
2529 | case 3: i915_write_fence_reg(dev, reg, obj); break; | |
2530 | case 2: i830_write_fence_reg(dev, reg, obj); break; | |
2531 | default: break; | |
2532 | } | |
de151cf6 JB |
2533 | } |
2534 | ||
61050808 CW |
2535 | static inline int fence_number(struct drm_i915_private *dev_priv, |
2536 | struct drm_i915_fence_reg *fence) | |
2537 | { | |
2538 | return fence - dev_priv->fence_regs; | |
2539 | } | |
2540 | ||
2541 | static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, | |
2542 | struct drm_i915_fence_reg *fence, | |
2543 | bool enable) | |
2544 | { | |
2545 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; | |
2546 | int reg = fence_number(dev_priv, fence); | |
2547 | ||
2548 | i915_gem_write_fence(obj->base.dev, reg, enable ? obj : NULL); | |
2549 | ||
2550 | if (enable) { | |
2551 | obj->fence_reg = reg; | |
2552 | fence->obj = obj; | |
2553 | list_move_tail(&fence->lru_list, &dev_priv->mm.fence_list); | |
2554 | } else { | |
2555 | obj->fence_reg = I915_FENCE_REG_NONE; | |
2556 | fence->obj = NULL; | |
2557 | list_del_init(&fence->lru_list); | |
2558 | } | |
2559 | } | |
2560 | ||
d9e86c0e | 2561 | static int |
a360bb1a | 2562 | i915_gem_object_flush_fence(struct drm_i915_gem_object *obj) |
d9e86c0e | 2563 | { |
1c293ea3 | 2564 | if (obj->last_fenced_seqno) { |
86d5bc37 | 2565 | int ret = i915_wait_seqno(obj->ring, obj->last_fenced_seqno); |
18991845 CW |
2566 | if (ret) |
2567 | return ret; | |
d9e86c0e CW |
2568 | |
2569 | obj->last_fenced_seqno = 0; | |
d9e86c0e CW |
2570 | } |
2571 | ||
63256ec5 CW |
2572 | /* Ensure that all CPU reads are completed before installing a fence |
2573 | * and all writes before removing the fence. | |
2574 | */ | |
2575 | if (obj->base.read_domains & I915_GEM_DOMAIN_GTT) | |
2576 | mb(); | |
2577 | ||
86d5bc37 | 2578 | obj->fenced_gpu_access = false; |
d9e86c0e CW |
2579 | return 0; |
2580 | } | |
2581 | ||
2582 | int | |
2583 | i915_gem_object_put_fence(struct drm_i915_gem_object *obj) | |
2584 | { | |
61050808 | 2585 | struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
d9e86c0e CW |
2586 | int ret; |
2587 | ||
a360bb1a | 2588 | ret = i915_gem_object_flush_fence(obj); |
d9e86c0e CW |
2589 | if (ret) |
2590 | return ret; | |
2591 | ||
61050808 CW |
2592 | if (obj->fence_reg == I915_FENCE_REG_NONE) |
2593 | return 0; | |
d9e86c0e | 2594 | |
61050808 CW |
2595 | i915_gem_object_update_fence(obj, |
2596 | &dev_priv->fence_regs[obj->fence_reg], | |
2597 | false); | |
2598 | i915_gem_object_fence_lost(obj); | |
d9e86c0e CW |
2599 | |
2600 | return 0; | |
2601 | } | |
2602 | ||
2603 | static struct drm_i915_fence_reg * | |
a360bb1a | 2604 | i915_find_fence_reg(struct drm_device *dev) |
ae3db24a | 2605 | { |
ae3db24a | 2606 | struct drm_i915_private *dev_priv = dev->dev_private; |
8fe301ad | 2607 | struct drm_i915_fence_reg *reg, *avail; |
d9e86c0e | 2608 | int i; |
ae3db24a DV |
2609 | |
2610 | /* First try to find a free reg */ | |
d9e86c0e | 2611 | avail = NULL; |
ae3db24a DV |
2612 | for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { |
2613 | reg = &dev_priv->fence_regs[i]; | |
2614 | if (!reg->obj) | |
d9e86c0e | 2615 | return reg; |
ae3db24a | 2616 | |
1690e1eb | 2617 | if (!reg->pin_count) |
d9e86c0e | 2618 | avail = reg; |
ae3db24a DV |
2619 | } |
2620 | ||
d9e86c0e CW |
2621 | if (avail == NULL) |
2622 | return NULL; | |
ae3db24a DV |
2623 | |
2624 | /* None available, try to steal one or wait for a user to finish */ | |
d9e86c0e | 2625 | list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) { |
1690e1eb | 2626 | if (reg->pin_count) |
ae3db24a DV |
2627 | continue; |
2628 | ||
8fe301ad | 2629 | return reg; |
ae3db24a DV |
2630 | } |
2631 | ||
8fe301ad | 2632 | return NULL; |
ae3db24a DV |
2633 | } |
2634 | ||
de151cf6 | 2635 | /** |
9a5a53b3 | 2636 | * i915_gem_object_get_fence - set up fencing for an object |
de151cf6 JB |
2637 | * @obj: object to map through a fence reg |
2638 | * | |
2639 | * When mapping objects through the GTT, userspace wants to be able to write | |
2640 | * to them without having to worry about swizzling if the object is tiled. | |
de151cf6 JB |
2641 | * This function walks the fence regs looking for a free one for @obj, |
2642 | * stealing one if it can't find any. | |
2643 | * | |
2644 | * It then sets up the reg based on the object's properties: address, pitch | |
2645 | * and tiling format. | |
9a5a53b3 CW |
2646 | * |
2647 | * For an untiled surface, this removes any existing fence. | |
de151cf6 | 2648 | */ |
8c4b8c3f | 2649 | int |
06d98131 | 2650 | i915_gem_object_get_fence(struct drm_i915_gem_object *obj) |
de151cf6 | 2651 | { |
05394f39 | 2652 | struct drm_device *dev = obj->base.dev; |
79e53945 | 2653 | struct drm_i915_private *dev_priv = dev->dev_private; |
14415745 | 2654 | bool enable = obj->tiling_mode != I915_TILING_NONE; |
d9e86c0e | 2655 | struct drm_i915_fence_reg *reg; |
ae3db24a | 2656 | int ret; |
de151cf6 | 2657 | |
14415745 CW |
2658 | /* Have we updated the tiling parameters upon the object and so |
2659 | * will need to serialise the write to the associated fence register? | |
2660 | */ | |
5d82e3e6 | 2661 | if (obj->fence_dirty) { |
14415745 CW |
2662 | ret = i915_gem_object_flush_fence(obj); |
2663 | if (ret) | |
2664 | return ret; | |
2665 | } | |
9a5a53b3 | 2666 | |
d9e86c0e | 2667 | /* Just update our place in the LRU if our fence is getting reused. */ |
05394f39 CW |
2668 | if (obj->fence_reg != I915_FENCE_REG_NONE) { |
2669 | reg = &dev_priv->fence_regs[obj->fence_reg]; | |
5d82e3e6 | 2670 | if (!obj->fence_dirty) { |
14415745 CW |
2671 | list_move_tail(®->lru_list, |
2672 | &dev_priv->mm.fence_list); | |
2673 | return 0; | |
2674 | } | |
2675 | } else if (enable) { | |
2676 | reg = i915_find_fence_reg(dev); | |
2677 | if (reg == NULL) | |
2678 | return -EDEADLK; | |
d9e86c0e | 2679 | |
14415745 CW |
2680 | if (reg->obj) { |
2681 | struct drm_i915_gem_object *old = reg->obj; | |
2682 | ||
2683 | ret = i915_gem_object_flush_fence(old); | |
29c5a587 CW |
2684 | if (ret) |
2685 | return ret; | |
2686 | ||
14415745 | 2687 | i915_gem_object_fence_lost(old); |
29c5a587 | 2688 | } |
14415745 | 2689 | } else |
a09ba7fa | 2690 | return 0; |
a09ba7fa | 2691 | |
14415745 | 2692 | i915_gem_object_update_fence(obj, reg, enable); |
5d82e3e6 | 2693 | obj->fence_dirty = false; |
14415745 | 2694 | |
9ce079e4 | 2695 | return 0; |
de151cf6 JB |
2696 | } |
2697 | ||
42d6ab48 CW |
2698 | static bool i915_gem_valid_gtt_space(struct drm_device *dev, |
2699 | struct drm_mm_node *gtt_space, | |
2700 | unsigned long cache_level) | |
2701 | { | |
2702 | struct drm_mm_node *other; | |
2703 | ||
2704 | /* On non-LLC machines we have to be careful when putting differing | |
2705 | * types of snoopable memory together to avoid the prefetcher | |
2706 | * crossing memory domains and dieing. | |
2707 | */ | |
2708 | if (HAS_LLC(dev)) | |
2709 | return true; | |
2710 | ||
2711 | if (gtt_space == NULL) | |
2712 | return true; | |
2713 | ||
2714 | if (list_empty(>t_space->node_list)) | |
2715 | return true; | |
2716 | ||
2717 | other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list); | |
2718 | if (other->allocated && !other->hole_follows && other->color != cache_level) | |
2719 | return false; | |
2720 | ||
2721 | other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list); | |
2722 | if (other->allocated && !gtt_space->hole_follows && other->color != cache_level) | |
2723 | return false; | |
2724 | ||
2725 | return true; | |
2726 | } | |
2727 | ||
2728 | static void i915_gem_verify_gtt(struct drm_device *dev) | |
2729 | { | |
2730 | #if WATCH_GTT | |
2731 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2732 | struct drm_i915_gem_object *obj; | |
2733 | int err = 0; | |
2734 | ||
2735 | list_for_each_entry(obj, &dev_priv->mm.gtt_list, gtt_list) { | |
2736 | if (obj->gtt_space == NULL) { | |
2737 | printk(KERN_ERR "object found on GTT list with no space reserved\n"); | |
2738 | err++; | |
2739 | continue; | |
2740 | } | |
2741 | ||
2742 | if (obj->cache_level != obj->gtt_space->color) { | |
2743 | printk(KERN_ERR "object reserved space [%08lx, %08lx] with wrong color, cache_level=%x, color=%lx\n", | |
2744 | obj->gtt_space->start, | |
2745 | obj->gtt_space->start + obj->gtt_space->size, | |
2746 | obj->cache_level, | |
2747 | obj->gtt_space->color); | |
2748 | err++; | |
2749 | continue; | |
2750 | } | |
2751 | ||
2752 | if (!i915_gem_valid_gtt_space(dev, | |
2753 | obj->gtt_space, | |
2754 | obj->cache_level)) { | |
2755 | printk(KERN_ERR "invalid GTT space found at [%08lx, %08lx] - color=%x\n", | |
2756 | obj->gtt_space->start, | |
2757 | obj->gtt_space->start + obj->gtt_space->size, | |
2758 | obj->cache_level); | |
2759 | err++; | |
2760 | continue; | |
2761 | } | |
2762 | } | |
2763 | ||
2764 | WARN_ON(err); | |
2765 | #endif | |
2766 | } | |
2767 | ||
673a394b EA |
2768 | /** |
2769 | * Finds free space in the GTT aperture and binds the object there. | |
2770 | */ | |
2771 | static int | |
05394f39 | 2772 | i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj, |
920afa77 | 2773 | unsigned alignment, |
86a1ee26 CW |
2774 | bool map_and_fenceable, |
2775 | bool nonblocking) | |
673a394b | 2776 | { |
05394f39 | 2777 | struct drm_device *dev = obj->base.dev; |
673a394b | 2778 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b | 2779 | struct drm_mm_node *free_space; |
5e783301 | 2780 | u32 size, fence_size, fence_alignment, unfenced_alignment; |
75e9e915 | 2781 | bool mappable, fenceable; |
07f73f69 | 2782 | int ret; |
673a394b | 2783 | |
05394f39 | 2784 | if (obj->madv != I915_MADV_WILLNEED) { |
3ef94daa CW |
2785 | DRM_ERROR("Attempting to bind a purgeable object\n"); |
2786 | return -EINVAL; | |
2787 | } | |
2788 | ||
e28f8711 CW |
2789 | fence_size = i915_gem_get_gtt_size(dev, |
2790 | obj->base.size, | |
2791 | obj->tiling_mode); | |
2792 | fence_alignment = i915_gem_get_gtt_alignment(dev, | |
2793 | obj->base.size, | |
2794 | obj->tiling_mode); | |
2795 | unfenced_alignment = | |
2796 | i915_gem_get_unfenced_gtt_alignment(dev, | |
2797 | obj->base.size, | |
2798 | obj->tiling_mode); | |
a00b10c3 | 2799 | |
673a394b | 2800 | if (alignment == 0) |
5e783301 DV |
2801 | alignment = map_and_fenceable ? fence_alignment : |
2802 | unfenced_alignment; | |
75e9e915 | 2803 | if (map_and_fenceable && alignment & (fence_alignment - 1)) { |
673a394b EA |
2804 | DRM_ERROR("Invalid object alignment requested %u\n", alignment); |
2805 | return -EINVAL; | |
2806 | } | |
2807 | ||
05394f39 | 2808 | size = map_and_fenceable ? fence_size : obj->base.size; |
a00b10c3 | 2809 | |
654fc607 CW |
2810 | /* If the object is bigger than the entire aperture, reject it early |
2811 | * before evicting everything in a vain attempt to find space. | |
2812 | */ | |
05394f39 | 2813 | if (obj->base.size > |
75e9e915 | 2814 | (map_and_fenceable ? dev_priv->mm.gtt_mappable_end : dev_priv->mm.gtt_total)) { |
654fc607 CW |
2815 | DRM_ERROR("Attempting to bind an object larger than the aperture\n"); |
2816 | return -E2BIG; | |
2817 | } | |
2818 | ||
6c085a72 CW |
2819 | ret = i915_gem_object_get_pages_gtt(obj); |
2820 | if (ret) | |
2821 | return ret; | |
2822 | ||
673a394b | 2823 | search_free: |
75e9e915 | 2824 | if (map_and_fenceable) |
920afa77 | 2825 | free_space = |
42d6ab48 CW |
2826 | drm_mm_search_free_in_range_color(&dev_priv->mm.gtt_space, |
2827 | size, alignment, obj->cache_level, | |
2828 | 0, dev_priv->mm.gtt_mappable_end, | |
2829 | false); | |
920afa77 | 2830 | else |
42d6ab48 CW |
2831 | free_space = drm_mm_search_free_color(&dev_priv->mm.gtt_space, |
2832 | size, alignment, obj->cache_level, | |
2833 | false); | |
920afa77 DV |
2834 | |
2835 | if (free_space != NULL) { | |
75e9e915 | 2836 | if (map_and_fenceable) |
05394f39 | 2837 | obj->gtt_space = |
920afa77 | 2838 | drm_mm_get_block_range_generic(free_space, |
42d6ab48 | 2839 | size, alignment, obj->cache_level, |
6b9d89b4 | 2840 | 0, dev_priv->mm.gtt_mappable_end, |
42d6ab48 | 2841 | false); |
920afa77 | 2842 | else |
05394f39 | 2843 | obj->gtt_space = |
42d6ab48 CW |
2844 | drm_mm_get_block_generic(free_space, |
2845 | size, alignment, obj->cache_level, | |
2846 | false); | |
920afa77 | 2847 | } |
05394f39 | 2848 | if (obj->gtt_space == NULL) { |
75e9e915 | 2849 | ret = i915_gem_evict_something(dev, size, alignment, |
42d6ab48 | 2850 | obj->cache_level, |
86a1ee26 CW |
2851 | map_and_fenceable, |
2852 | nonblocking); | |
9731129c | 2853 | if (ret) |
673a394b | 2854 | return ret; |
9731129c | 2855 | |
673a394b EA |
2856 | goto search_free; |
2857 | } | |
42d6ab48 CW |
2858 | if (WARN_ON(!i915_gem_valid_gtt_space(dev, |
2859 | obj->gtt_space, | |
2860 | obj->cache_level))) { | |
2861 | drm_mm_put_block(obj->gtt_space); | |
2862 | obj->gtt_space = NULL; | |
2863 | return -EINVAL; | |
2864 | } | |
673a394b | 2865 | |
673a394b | 2866 | |
74163907 | 2867 | ret = i915_gem_gtt_prepare_object(obj); |
7c2e6fdf | 2868 | if (ret) { |
05394f39 CW |
2869 | drm_mm_put_block(obj->gtt_space); |
2870 | obj->gtt_space = NULL; | |
6c085a72 | 2871 | return ret; |
673a394b | 2872 | } |
673a394b | 2873 | |
0ebb9829 DV |
2874 | if (!dev_priv->mm.aliasing_ppgtt) |
2875 | i915_gem_gtt_bind_object(obj, obj->cache_level); | |
673a394b | 2876 | |
6c085a72 | 2877 | list_move_tail(&obj->gtt_list, &dev_priv->mm.bound_list); |
05394f39 | 2878 | list_add_tail(&obj->mm_list, &dev_priv->mm.inactive_list); |
bf1a1092 | 2879 | |
6299f992 | 2880 | obj->gtt_offset = obj->gtt_space->start; |
1c5d22f7 | 2881 | |
75e9e915 | 2882 | fenceable = |
05394f39 | 2883 | obj->gtt_space->size == fence_size && |
0206e353 | 2884 | (obj->gtt_space->start & (fence_alignment - 1)) == 0; |
a00b10c3 | 2885 | |
75e9e915 | 2886 | mappable = |
05394f39 | 2887 | obj->gtt_offset + obj->base.size <= dev_priv->mm.gtt_mappable_end; |
a00b10c3 | 2888 | |
05394f39 | 2889 | obj->map_and_fenceable = mappable && fenceable; |
75e9e915 | 2890 | |
db53a302 | 2891 | trace_i915_gem_object_bind(obj, map_and_fenceable); |
42d6ab48 | 2892 | i915_gem_verify_gtt(dev); |
673a394b EA |
2893 | return 0; |
2894 | } | |
2895 | ||
2896 | void | |
05394f39 | 2897 | i915_gem_clflush_object(struct drm_i915_gem_object *obj) |
673a394b | 2898 | { |
673a394b EA |
2899 | /* If we don't have a page list set up, then we're not pinned |
2900 | * to GPU, and we can ignore the cache flush because it'll happen | |
2901 | * again at bind time. | |
2902 | */ | |
05394f39 | 2903 | if (obj->pages == NULL) |
673a394b EA |
2904 | return; |
2905 | ||
9c23f7fc CW |
2906 | /* If the GPU is snooping the contents of the CPU cache, |
2907 | * we do not need to manually clear the CPU cache lines. However, | |
2908 | * the caches are only snooped when the render cache is | |
2909 | * flushed/invalidated. As we always have to emit invalidations | |
2910 | * and flushes when moving into and out of the RENDER domain, correct | |
2911 | * snooping behaviour occurs naturally as the result of our domain | |
2912 | * tracking. | |
2913 | */ | |
2914 | if (obj->cache_level != I915_CACHE_NONE) | |
2915 | return; | |
2916 | ||
1c5d22f7 | 2917 | trace_i915_gem_object_clflush(obj); |
cfa16a0d | 2918 | |
05394f39 | 2919 | drm_clflush_pages(obj->pages, obj->base.size / PAGE_SIZE); |
673a394b EA |
2920 | } |
2921 | ||
e47c68e9 EA |
2922 | /** Flushes the GTT write domain for the object if it's dirty. */ |
2923 | static void | |
05394f39 | 2924 | i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj) |
e47c68e9 | 2925 | { |
1c5d22f7 CW |
2926 | uint32_t old_write_domain; |
2927 | ||
05394f39 | 2928 | if (obj->base.write_domain != I915_GEM_DOMAIN_GTT) |
e47c68e9 EA |
2929 | return; |
2930 | ||
63256ec5 | 2931 | /* No actual flushing is required for the GTT write domain. Writes |
e47c68e9 EA |
2932 | * to it immediately go to main memory as far as we know, so there's |
2933 | * no chipset flush. It also doesn't land in render cache. | |
63256ec5 CW |
2934 | * |
2935 | * However, we do have to enforce the order so that all writes through | |
2936 | * the GTT land before any writes to the device, such as updates to | |
2937 | * the GATT itself. | |
e47c68e9 | 2938 | */ |
63256ec5 CW |
2939 | wmb(); |
2940 | ||
05394f39 CW |
2941 | old_write_domain = obj->base.write_domain; |
2942 | obj->base.write_domain = 0; | |
1c5d22f7 CW |
2943 | |
2944 | trace_i915_gem_object_change_domain(obj, | |
05394f39 | 2945 | obj->base.read_domains, |
1c5d22f7 | 2946 | old_write_domain); |
e47c68e9 EA |
2947 | } |
2948 | ||
2949 | /** Flushes the CPU write domain for the object if it's dirty. */ | |
2950 | static void | |
05394f39 | 2951 | i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj) |
e47c68e9 | 2952 | { |
1c5d22f7 | 2953 | uint32_t old_write_domain; |
e47c68e9 | 2954 | |
05394f39 | 2955 | if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) |
e47c68e9 EA |
2956 | return; |
2957 | ||
2958 | i915_gem_clflush_object(obj); | |
40ce6575 | 2959 | intel_gtt_chipset_flush(); |
05394f39 CW |
2960 | old_write_domain = obj->base.write_domain; |
2961 | obj->base.write_domain = 0; | |
1c5d22f7 CW |
2962 | |
2963 | trace_i915_gem_object_change_domain(obj, | |
05394f39 | 2964 | obj->base.read_domains, |
1c5d22f7 | 2965 | old_write_domain); |
e47c68e9 EA |
2966 | } |
2967 | ||
2ef7eeaa EA |
2968 | /** |
2969 | * Moves a single object to the GTT read, and possibly write domain. | |
2970 | * | |
2971 | * This function returns when the move is complete, including waiting on | |
2972 | * flushes to occur. | |
2973 | */ | |
79e53945 | 2974 | int |
2021746e | 2975 | i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write) |
2ef7eeaa | 2976 | { |
8325a09d | 2977 | drm_i915_private_t *dev_priv = obj->base.dev->dev_private; |
1c5d22f7 | 2978 | uint32_t old_write_domain, old_read_domains; |
e47c68e9 | 2979 | int ret; |
2ef7eeaa | 2980 | |
02354392 | 2981 | /* Not valid to be called on unbound objects. */ |
05394f39 | 2982 | if (obj->gtt_space == NULL) |
02354392 EA |
2983 | return -EINVAL; |
2984 | ||
8d7e3de1 CW |
2985 | if (obj->base.write_domain == I915_GEM_DOMAIN_GTT) |
2986 | return 0; | |
2987 | ||
0201f1ec CW |
2988 | ret = i915_gem_object_wait_rendering(obj, !write); |
2989 | if (ret) | |
2990 | return ret; | |
2dafb1e0 | 2991 | |
7213342d | 2992 | i915_gem_object_flush_cpu_write_domain(obj); |
1c5d22f7 | 2993 | |
05394f39 CW |
2994 | old_write_domain = obj->base.write_domain; |
2995 | old_read_domains = obj->base.read_domains; | |
1c5d22f7 | 2996 | |
e47c68e9 EA |
2997 | /* It should now be out of any other write domains, and we can update |
2998 | * the domain values for our changes. | |
2999 | */ | |
05394f39 CW |
3000 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0); |
3001 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; | |
e47c68e9 | 3002 | if (write) { |
05394f39 CW |
3003 | obj->base.read_domains = I915_GEM_DOMAIN_GTT; |
3004 | obj->base.write_domain = I915_GEM_DOMAIN_GTT; | |
3005 | obj->dirty = 1; | |
2ef7eeaa EA |
3006 | } |
3007 | ||
1c5d22f7 CW |
3008 | trace_i915_gem_object_change_domain(obj, |
3009 | old_read_domains, | |
3010 | old_write_domain); | |
3011 | ||
8325a09d CW |
3012 | /* And bump the LRU for this access */ |
3013 | if (i915_gem_object_is_inactive(obj)) | |
3014 | list_move_tail(&obj->mm_list, &dev_priv->mm.inactive_list); | |
3015 | ||
e47c68e9 EA |
3016 | return 0; |
3017 | } | |
3018 | ||
e4ffd173 CW |
3019 | int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj, |
3020 | enum i915_cache_level cache_level) | |
3021 | { | |
7bddb01f DV |
3022 | struct drm_device *dev = obj->base.dev; |
3023 | drm_i915_private_t *dev_priv = dev->dev_private; | |
e4ffd173 CW |
3024 | int ret; |
3025 | ||
3026 | if (obj->cache_level == cache_level) | |
3027 | return 0; | |
3028 | ||
3029 | if (obj->pin_count) { | |
3030 | DRM_DEBUG("can not change the cache level of pinned objects\n"); | |
3031 | return -EBUSY; | |
3032 | } | |
3033 | ||
42d6ab48 CW |
3034 | if (!i915_gem_valid_gtt_space(dev, obj->gtt_space, cache_level)) { |
3035 | ret = i915_gem_object_unbind(obj); | |
3036 | if (ret) | |
3037 | return ret; | |
3038 | } | |
3039 | ||
e4ffd173 CW |
3040 | if (obj->gtt_space) { |
3041 | ret = i915_gem_object_finish_gpu(obj); | |
3042 | if (ret) | |
3043 | return ret; | |
3044 | ||
3045 | i915_gem_object_finish_gtt(obj); | |
3046 | ||
3047 | /* Before SandyBridge, you could not use tiling or fence | |
3048 | * registers with snooped memory, so relinquish any fences | |
3049 | * currently pointing to our region in the aperture. | |
3050 | */ | |
42d6ab48 | 3051 | if (INTEL_INFO(dev)->gen < 6) { |
e4ffd173 CW |
3052 | ret = i915_gem_object_put_fence(obj); |
3053 | if (ret) | |
3054 | return ret; | |
3055 | } | |
3056 | ||
74898d7e DV |
3057 | if (obj->has_global_gtt_mapping) |
3058 | i915_gem_gtt_bind_object(obj, cache_level); | |
7bddb01f DV |
3059 | if (obj->has_aliasing_ppgtt_mapping) |
3060 | i915_ppgtt_bind_object(dev_priv->mm.aliasing_ppgtt, | |
3061 | obj, cache_level); | |
42d6ab48 CW |
3062 | |
3063 | obj->gtt_space->color = cache_level; | |
e4ffd173 CW |
3064 | } |
3065 | ||
3066 | if (cache_level == I915_CACHE_NONE) { | |
3067 | u32 old_read_domains, old_write_domain; | |
3068 | ||
3069 | /* If we're coming from LLC cached, then we haven't | |
3070 | * actually been tracking whether the data is in the | |
3071 | * CPU cache or not, since we only allow one bit set | |
3072 | * in obj->write_domain and have been skipping the clflushes. | |
3073 | * Just set it to the CPU cache for now. | |
3074 | */ | |
3075 | WARN_ON(obj->base.write_domain & ~I915_GEM_DOMAIN_CPU); | |
3076 | WARN_ON(obj->base.read_domains & ~I915_GEM_DOMAIN_CPU); | |
3077 | ||
3078 | old_read_domains = obj->base.read_domains; | |
3079 | old_write_domain = obj->base.write_domain; | |
3080 | ||
3081 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; | |
3082 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
3083 | ||
3084 | trace_i915_gem_object_change_domain(obj, | |
3085 | old_read_domains, | |
3086 | old_write_domain); | |
3087 | } | |
3088 | ||
3089 | obj->cache_level = cache_level; | |
42d6ab48 | 3090 | i915_gem_verify_gtt(dev); |
e4ffd173 CW |
3091 | return 0; |
3092 | } | |
3093 | ||
e6994aee CW |
3094 | int i915_gem_get_cacheing_ioctl(struct drm_device *dev, void *data, |
3095 | struct drm_file *file) | |
3096 | { | |
3097 | struct drm_i915_gem_cacheing *args = data; | |
3098 | struct drm_i915_gem_object *obj; | |
3099 | int ret; | |
3100 | ||
3101 | ret = i915_mutex_lock_interruptible(dev); | |
3102 | if (ret) | |
3103 | return ret; | |
3104 | ||
3105 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); | |
3106 | if (&obj->base == NULL) { | |
3107 | ret = -ENOENT; | |
3108 | goto unlock; | |
3109 | } | |
3110 | ||
3111 | args->cacheing = obj->cache_level != I915_CACHE_NONE; | |
3112 | ||
3113 | drm_gem_object_unreference(&obj->base); | |
3114 | unlock: | |
3115 | mutex_unlock(&dev->struct_mutex); | |
3116 | return ret; | |
3117 | } | |
3118 | ||
3119 | int i915_gem_set_cacheing_ioctl(struct drm_device *dev, void *data, | |
3120 | struct drm_file *file) | |
3121 | { | |
3122 | struct drm_i915_gem_cacheing *args = data; | |
3123 | struct drm_i915_gem_object *obj; | |
3124 | enum i915_cache_level level; | |
3125 | int ret; | |
3126 | ||
3127 | ret = i915_mutex_lock_interruptible(dev); | |
3128 | if (ret) | |
3129 | return ret; | |
3130 | ||
3131 | switch (args->cacheing) { | |
3132 | case I915_CACHEING_NONE: | |
3133 | level = I915_CACHE_NONE; | |
3134 | break; | |
3135 | case I915_CACHEING_CACHED: | |
3136 | level = I915_CACHE_LLC; | |
3137 | break; | |
3138 | default: | |
3139 | return -EINVAL; | |
3140 | } | |
3141 | ||
3142 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); | |
3143 | if (&obj->base == NULL) { | |
3144 | ret = -ENOENT; | |
3145 | goto unlock; | |
3146 | } | |
3147 | ||
3148 | ret = i915_gem_object_set_cache_level(obj, level); | |
3149 | ||
3150 | drm_gem_object_unreference(&obj->base); | |
3151 | unlock: | |
3152 | mutex_unlock(&dev->struct_mutex); | |
3153 | return ret; | |
3154 | } | |
3155 | ||
b9241ea3 | 3156 | /* |
2da3b9b9 CW |
3157 | * Prepare buffer for display plane (scanout, cursors, etc). |
3158 | * Can be called from an uninterruptible phase (modesetting) and allows | |
3159 | * any flushes to be pipelined (for pageflips). | |
b9241ea3 ZW |
3160 | */ |
3161 | int | |
2da3b9b9 CW |
3162 | i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, |
3163 | u32 alignment, | |
919926ae | 3164 | struct intel_ring_buffer *pipelined) |
b9241ea3 | 3165 | { |
2da3b9b9 | 3166 | u32 old_read_domains, old_write_domain; |
b9241ea3 ZW |
3167 | int ret; |
3168 | ||
0be73284 | 3169 | if (pipelined != obj->ring) { |
2911a35b BW |
3170 | ret = i915_gem_object_sync(obj, pipelined); |
3171 | if (ret) | |
b9241ea3 ZW |
3172 | return ret; |
3173 | } | |
3174 | ||
a7ef0640 EA |
3175 | /* The display engine is not coherent with the LLC cache on gen6. As |
3176 | * a result, we make sure that the pinning that is about to occur is | |
3177 | * done with uncached PTEs. This is lowest common denominator for all | |
3178 | * chipsets. | |
3179 | * | |
3180 | * However for gen6+, we could do better by using the GFDT bit instead | |
3181 | * of uncaching, which would allow us to flush all the LLC-cached data | |
3182 | * with that bit in the PTE to main memory with just one PIPE_CONTROL. | |
3183 | */ | |
3184 | ret = i915_gem_object_set_cache_level(obj, I915_CACHE_NONE); | |
3185 | if (ret) | |
3186 | return ret; | |
3187 | ||
2da3b9b9 CW |
3188 | /* As the user may map the buffer once pinned in the display plane |
3189 | * (e.g. libkms for the bootup splash), we have to ensure that we | |
3190 | * always use map_and_fenceable for all scanout buffers. | |
3191 | */ | |
86a1ee26 | 3192 | ret = i915_gem_object_pin(obj, alignment, true, false); |
2da3b9b9 CW |
3193 | if (ret) |
3194 | return ret; | |
3195 | ||
b118c1e3 CW |
3196 | i915_gem_object_flush_cpu_write_domain(obj); |
3197 | ||
2da3b9b9 | 3198 | old_write_domain = obj->base.write_domain; |
05394f39 | 3199 | old_read_domains = obj->base.read_domains; |
2da3b9b9 CW |
3200 | |
3201 | /* It should now be out of any other write domains, and we can update | |
3202 | * the domain values for our changes. | |
3203 | */ | |
e5f1d962 | 3204 | obj->base.write_domain = 0; |
05394f39 | 3205 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; |
b9241ea3 ZW |
3206 | |
3207 | trace_i915_gem_object_change_domain(obj, | |
3208 | old_read_domains, | |
2da3b9b9 | 3209 | old_write_domain); |
b9241ea3 ZW |
3210 | |
3211 | return 0; | |
3212 | } | |
3213 | ||
85345517 | 3214 | int |
a8198eea | 3215 | i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj) |
85345517 | 3216 | { |
88241785 CW |
3217 | int ret; |
3218 | ||
a8198eea | 3219 | if ((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0) |
85345517 CW |
3220 | return 0; |
3221 | ||
0201f1ec | 3222 | ret = i915_gem_object_wait_rendering(obj, false); |
c501ae7f CW |
3223 | if (ret) |
3224 | return ret; | |
3225 | ||
a8198eea CW |
3226 | /* Ensure that we invalidate the GPU's caches and TLBs. */ |
3227 | obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS; | |
c501ae7f | 3228 | return 0; |
85345517 CW |
3229 | } |
3230 | ||
e47c68e9 EA |
3231 | /** |
3232 | * Moves a single object to the CPU read, and possibly write domain. | |
3233 | * | |
3234 | * This function returns when the move is complete, including waiting on | |
3235 | * flushes to occur. | |
3236 | */ | |
dabdfe02 | 3237 | int |
919926ae | 3238 | i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write) |
e47c68e9 | 3239 | { |
1c5d22f7 | 3240 | uint32_t old_write_domain, old_read_domains; |
e47c68e9 EA |
3241 | int ret; |
3242 | ||
8d7e3de1 CW |
3243 | if (obj->base.write_domain == I915_GEM_DOMAIN_CPU) |
3244 | return 0; | |
3245 | ||
0201f1ec CW |
3246 | ret = i915_gem_object_wait_rendering(obj, !write); |
3247 | if (ret) | |
3248 | return ret; | |
2ef7eeaa | 3249 | |
e47c68e9 | 3250 | i915_gem_object_flush_gtt_write_domain(obj); |
2ef7eeaa | 3251 | |
05394f39 CW |
3252 | old_write_domain = obj->base.write_domain; |
3253 | old_read_domains = obj->base.read_domains; | |
1c5d22f7 | 3254 | |
e47c68e9 | 3255 | /* Flush the CPU cache if it's still invalid. */ |
05394f39 | 3256 | if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) { |
2ef7eeaa | 3257 | i915_gem_clflush_object(obj); |
2ef7eeaa | 3258 | |
05394f39 | 3259 | obj->base.read_domains |= I915_GEM_DOMAIN_CPU; |
2ef7eeaa EA |
3260 | } |
3261 | ||
3262 | /* It should now be out of any other write domains, and we can update | |
3263 | * the domain values for our changes. | |
3264 | */ | |
05394f39 | 3265 | BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) != 0); |
e47c68e9 EA |
3266 | |
3267 | /* If we're writing through the CPU, then the GPU read domains will | |
3268 | * need to be invalidated at next use. | |
3269 | */ | |
3270 | if (write) { | |
05394f39 CW |
3271 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; |
3272 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
e47c68e9 | 3273 | } |
2ef7eeaa | 3274 | |
1c5d22f7 CW |
3275 | trace_i915_gem_object_change_domain(obj, |
3276 | old_read_domains, | |
3277 | old_write_domain); | |
3278 | ||
2ef7eeaa EA |
3279 | return 0; |
3280 | } | |
3281 | ||
673a394b EA |
3282 | /* Throttle our rendering by waiting until the ring has completed our requests |
3283 | * emitted over 20 msec ago. | |
3284 | * | |
b962442e EA |
3285 | * Note that if we were to use the current jiffies each time around the loop, |
3286 | * we wouldn't escape the function with any frames outstanding if the time to | |
3287 | * render a frame was over 20ms. | |
3288 | * | |
673a394b EA |
3289 | * This should get us reasonable parallelism between CPU and GPU but also |
3290 | * relatively low latency when blocking on a particular request to finish. | |
3291 | */ | |
40a5f0de | 3292 | static int |
f787a5f5 | 3293 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file) |
40a5f0de | 3294 | { |
f787a5f5 CW |
3295 | struct drm_i915_private *dev_priv = dev->dev_private; |
3296 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
b962442e | 3297 | unsigned long recent_enough = jiffies - msecs_to_jiffies(20); |
f787a5f5 CW |
3298 | struct drm_i915_gem_request *request; |
3299 | struct intel_ring_buffer *ring = NULL; | |
3300 | u32 seqno = 0; | |
3301 | int ret; | |
93533c29 | 3302 | |
e110e8d6 CW |
3303 | if (atomic_read(&dev_priv->mm.wedged)) |
3304 | return -EIO; | |
3305 | ||
1c25595f | 3306 | spin_lock(&file_priv->mm.lock); |
f787a5f5 | 3307 | list_for_each_entry(request, &file_priv->mm.request_list, client_list) { |
b962442e EA |
3308 | if (time_after_eq(request->emitted_jiffies, recent_enough)) |
3309 | break; | |
40a5f0de | 3310 | |
f787a5f5 CW |
3311 | ring = request->ring; |
3312 | seqno = request->seqno; | |
b962442e | 3313 | } |
1c25595f | 3314 | spin_unlock(&file_priv->mm.lock); |
40a5f0de | 3315 | |
f787a5f5 CW |
3316 | if (seqno == 0) |
3317 | return 0; | |
2bc43b5c | 3318 | |
5c81fe85 | 3319 | ret = __wait_seqno(ring, seqno, true, NULL); |
f787a5f5 CW |
3320 | if (ret == 0) |
3321 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, 0); | |
40a5f0de EA |
3322 | |
3323 | return ret; | |
3324 | } | |
3325 | ||
673a394b | 3326 | int |
05394f39 CW |
3327 | i915_gem_object_pin(struct drm_i915_gem_object *obj, |
3328 | uint32_t alignment, | |
86a1ee26 CW |
3329 | bool map_and_fenceable, |
3330 | bool nonblocking) | |
673a394b | 3331 | { |
673a394b EA |
3332 | int ret; |
3333 | ||
05394f39 | 3334 | BUG_ON(obj->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT); |
ac0c6b5a | 3335 | |
05394f39 CW |
3336 | if (obj->gtt_space != NULL) { |
3337 | if ((alignment && obj->gtt_offset & (alignment - 1)) || | |
3338 | (map_and_fenceable && !obj->map_and_fenceable)) { | |
3339 | WARN(obj->pin_count, | |
ae7d49d8 | 3340 | "bo is already pinned with incorrect alignment:" |
75e9e915 DV |
3341 | " offset=%x, req.alignment=%x, req.map_and_fenceable=%d," |
3342 | " obj->map_and_fenceable=%d\n", | |
05394f39 | 3343 | obj->gtt_offset, alignment, |
75e9e915 | 3344 | map_and_fenceable, |
05394f39 | 3345 | obj->map_and_fenceable); |
ac0c6b5a CW |
3346 | ret = i915_gem_object_unbind(obj); |
3347 | if (ret) | |
3348 | return ret; | |
3349 | } | |
3350 | } | |
3351 | ||
05394f39 | 3352 | if (obj->gtt_space == NULL) { |
a00b10c3 | 3353 | ret = i915_gem_object_bind_to_gtt(obj, alignment, |
86a1ee26 CW |
3354 | map_and_fenceable, |
3355 | nonblocking); | |
9731129c | 3356 | if (ret) |
673a394b | 3357 | return ret; |
22c344e9 | 3358 | } |
76446cac | 3359 | |
74898d7e DV |
3360 | if (!obj->has_global_gtt_mapping && map_and_fenceable) |
3361 | i915_gem_gtt_bind_object(obj, obj->cache_level); | |
3362 | ||
1b50247a | 3363 | obj->pin_count++; |
6299f992 | 3364 | obj->pin_mappable |= map_and_fenceable; |
673a394b EA |
3365 | |
3366 | return 0; | |
3367 | } | |
3368 | ||
3369 | void | |
05394f39 | 3370 | i915_gem_object_unpin(struct drm_i915_gem_object *obj) |
673a394b | 3371 | { |
05394f39 CW |
3372 | BUG_ON(obj->pin_count == 0); |
3373 | BUG_ON(obj->gtt_space == NULL); | |
673a394b | 3374 | |
1b50247a | 3375 | if (--obj->pin_count == 0) |
6299f992 | 3376 | obj->pin_mappable = false; |
673a394b EA |
3377 | } |
3378 | ||
3379 | int | |
3380 | i915_gem_pin_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 3381 | struct drm_file *file) |
673a394b EA |
3382 | { |
3383 | struct drm_i915_gem_pin *args = data; | |
05394f39 | 3384 | struct drm_i915_gem_object *obj; |
673a394b EA |
3385 | int ret; |
3386 | ||
1d7cfea1 CW |
3387 | ret = i915_mutex_lock_interruptible(dev); |
3388 | if (ret) | |
3389 | return ret; | |
673a394b | 3390 | |
05394f39 | 3391 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 3392 | if (&obj->base == NULL) { |
1d7cfea1 CW |
3393 | ret = -ENOENT; |
3394 | goto unlock; | |
673a394b | 3395 | } |
673a394b | 3396 | |
05394f39 | 3397 | if (obj->madv != I915_MADV_WILLNEED) { |
bb6baf76 | 3398 | DRM_ERROR("Attempting to pin a purgeable buffer\n"); |
1d7cfea1 CW |
3399 | ret = -EINVAL; |
3400 | goto out; | |
3ef94daa CW |
3401 | } |
3402 | ||
05394f39 | 3403 | if (obj->pin_filp != NULL && obj->pin_filp != file) { |
79e53945 JB |
3404 | DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n", |
3405 | args->handle); | |
1d7cfea1 CW |
3406 | ret = -EINVAL; |
3407 | goto out; | |
79e53945 JB |
3408 | } |
3409 | ||
05394f39 CW |
3410 | obj->user_pin_count++; |
3411 | obj->pin_filp = file; | |
3412 | if (obj->user_pin_count == 1) { | |
86a1ee26 | 3413 | ret = i915_gem_object_pin(obj, args->alignment, true, false); |
1d7cfea1 CW |
3414 | if (ret) |
3415 | goto out; | |
673a394b EA |
3416 | } |
3417 | ||
3418 | /* XXX - flush the CPU caches for pinned objects | |
3419 | * as the X server doesn't manage domains yet | |
3420 | */ | |
e47c68e9 | 3421 | i915_gem_object_flush_cpu_write_domain(obj); |
05394f39 | 3422 | args->offset = obj->gtt_offset; |
1d7cfea1 | 3423 | out: |
05394f39 | 3424 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 3425 | unlock: |
673a394b | 3426 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 3427 | return ret; |
673a394b EA |
3428 | } |
3429 | ||
3430 | int | |
3431 | i915_gem_unpin_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 3432 | struct drm_file *file) |
673a394b EA |
3433 | { |
3434 | struct drm_i915_gem_pin *args = data; | |
05394f39 | 3435 | struct drm_i915_gem_object *obj; |
76c1dec1 | 3436 | int ret; |
673a394b | 3437 | |
1d7cfea1 CW |
3438 | ret = i915_mutex_lock_interruptible(dev); |
3439 | if (ret) | |
3440 | return ret; | |
673a394b | 3441 | |
05394f39 | 3442 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 3443 | if (&obj->base == NULL) { |
1d7cfea1 CW |
3444 | ret = -ENOENT; |
3445 | goto unlock; | |
673a394b | 3446 | } |
76c1dec1 | 3447 | |
05394f39 | 3448 | if (obj->pin_filp != file) { |
79e53945 JB |
3449 | DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n", |
3450 | args->handle); | |
1d7cfea1 CW |
3451 | ret = -EINVAL; |
3452 | goto out; | |
79e53945 | 3453 | } |
05394f39 CW |
3454 | obj->user_pin_count--; |
3455 | if (obj->user_pin_count == 0) { | |
3456 | obj->pin_filp = NULL; | |
79e53945 JB |
3457 | i915_gem_object_unpin(obj); |
3458 | } | |
673a394b | 3459 | |
1d7cfea1 | 3460 | out: |
05394f39 | 3461 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 3462 | unlock: |
673a394b | 3463 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 3464 | return ret; |
673a394b EA |
3465 | } |
3466 | ||
3467 | int | |
3468 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 3469 | struct drm_file *file) |
673a394b EA |
3470 | { |
3471 | struct drm_i915_gem_busy *args = data; | |
05394f39 | 3472 | struct drm_i915_gem_object *obj; |
30dbf0c0 CW |
3473 | int ret; |
3474 | ||
76c1dec1 | 3475 | ret = i915_mutex_lock_interruptible(dev); |
1d7cfea1 | 3476 | if (ret) |
76c1dec1 | 3477 | return ret; |
673a394b | 3478 | |
05394f39 | 3479 | obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle)); |
c8725226 | 3480 | if (&obj->base == NULL) { |
1d7cfea1 CW |
3481 | ret = -ENOENT; |
3482 | goto unlock; | |
673a394b | 3483 | } |
d1b851fc | 3484 | |
0be555b6 CW |
3485 | /* Count all active objects as busy, even if they are currently not used |
3486 | * by the gpu. Users of this interface expect objects to eventually | |
3487 | * become non-busy without any further actions, therefore emit any | |
3488 | * necessary flushes here. | |
c4de0a5d | 3489 | */ |
30dfebf3 | 3490 | ret = i915_gem_object_flush_active(obj); |
0be555b6 | 3491 | |
30dfebf3 | 3492 | args->busy = obj->active; |
e9808edd CW |
3493 | if (obj->ring) { |
3494 | BUILD_BUG_ON(I915_NUM_RINGS > 16); | |
3495 | args->busy |= intel_ring_flag(obj->ring) << 16; | |
3496 | } | |
673a394b | 3497 | |
05394f39 | 3498 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 3499 | unlock: |
673a394b | 3500 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 3501 | return ret; |
673a394b EA |
3502 | } |
3503 | ||
3504 | int | |
3505 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, | |
3506 | struct drm_file *file_priv) | |
3507 | { | |
0206e353 | 3508 | return i915_gem_ring_throttle(dev, file_priv); |
673a394b EA |
3509 | } |
3510 | ||
3ef94daa CW |
3511 | int |
3512 | i915_gem_madvise_ioctl(struct drm_device *dev, void *data, | |
3513 | struct drm_file *file_priv) | |
3514 | { | |
3515 | struct drm_i915_gem_madvise *args = data; | |
05394f39 | 3516 | struct drm_i915_gem_object *obj; |
76c1dec1 | 3517 | int ret; |
3ef94daa CW |
3518 | |
3519 | switch (args->madv) { | |
3520 | case I915_MADV_DONTNEED: | |
3521 | case I915_MADV_WILLNEED: | |
3522 | break; | |
3523 | default: | |
3524 | return -EINVAL; | |
3525 | } | |
3526 | ||
1d7cfea1 CW |
3527 | ret = i915_mutex_lock_interruptible(dev); |
3528 | if (ret) | |
3529 | return ret; | |
3530 | ||
05394f39 | 3531 | obj = to_intel_bo(drm_gem_object_lookup(dev, file_priv, args->handle)); |
c8725226 | 3532 | if (&obj->base == NULL) { |
1d7cfea1 CW |
3533 | ret = -ENOENT; |
3534 | goto unlock; | |
3ef94daa | 3535 | } |
3ef94daa | 3536 | |
05394f39 | 3537 | if (obj->pin_count) { |
1d7cfea1 CW |
3538 | ret = -EINVAL; |
3539 | goto out; | |
3ef94daa CW |
3540 | } |
3541 | ||
05394f39 CW |
3542 | if (obj->madv != __I915_MADV_PURGED) |
3543 | obj->madv = args->madv; | |
3ef94daa | 3544 | |
6c085a72 CW |
3545 | /* if the object is no longer attached, discard its backing storage */ |
3546 | if (i915_gem_object_is_purgeable(obj) && obj->pages == NULL) | |
2d7ef395 CW |
3547 | i915_gem_object_truncate(obj); |
3548 | ||
05394f39 | 3549 | args->retained = obj->madv != __I915_MADV_PURGED; |
bb6baf76 | 3550 | |
1d7cfea1 | 3551 | out: |
05394f39 | 3552 | drm_gem_object_unreference(&obj->base); |
1d7cfea1 | 3553 | unlock: |
3ef94daa | 3554 | mutex_unlock(&dev->struct_mutex); |
1d7cfea1 | 3555 | return ret; |
3ef94daa CW |
3556 | } |
3557 | ||
05394f39 CW |
3558 | struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev, |
3559 | size_t size) | |
ac52bc56 | 3560 | { |
73aa808f | 3561 | struct drm_i915_private *dev_priv = dev->dev_private; |
c397b908 | 3562 | struct drm_i915_gem_object *obj; |
5949eac4 | 3563 | struct address_space *mapping; |
bed1ea95 | 3564 | u32 mask; |
ac52bc56 | 3565 | |
c397b908 DV |
3566 | obj = kzalloc(sizeof(*obj), GFP_KERNEL); |
3567 | if (obj == NULL) | |
3568 | return NULL; | |
673a394b | 3569 | |
c397b908 DV |
3570 | if (drm_gem_object_init(dev, &obj->base, size) != 0) { |
3571 | kfree(obj); | |
3572 | return NULL; | |
3573 | } | |
673a394b | 3574 | |
bed1ea95 CW |
3575 | mask = GFP_HIGHUSER | __GFP_RECLAIMABLE; |
3576 | if (IS_CRESTLINE(dev) || IS_BROADWATER(dev)) { | |
3577 | /* 965gm cannot relocate objects above 4GiB. */ | |
3578 | mask &= ~__GFP_HIGHMEM; | |
3579 | mask |= __GFP_DMA32; | |
3580 | } | |
3581 | ||
5949eac4 | 3582 | mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; |
bed1ea95 | 3583 | mapping_set_gfp_mask(mapping, mask); |
5949eac4 | 3584 | |
73aa808f CW |
3585 | i915_gem_info_add_obj(dev_priv, size); |
3586 | ||
c397b908 DV |
3587 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
3588 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; | |
673a394b | 3589 | |
3d29b842 ED |
3590 | if (HAS_LLC(dev)) { |
3591 | /* On some devices, we can have the GPU use the LLC (the CPU | |
a1871112 EA |
3592 | * cache) for about a 10% performance improvement |
3593 | * compared to uncached. Graphics requests other than | |
3594 | * display scanout are coherent with the CPU in | |
3595 | * accessing this cache. This means in this mode we | |
3596 | * don't need to clflush on the CPU side, and on the | |
3597 | * GPU side we only need to flush internal caches to | |
3598 | * get data visible to the CPU. | |
3599 | * | |
3600 | * However, we maintain the display planes as UC, and so | |
3601 | * need to rebind when first used as such. | |
3602 | */ | |
3603 | obj->cache_level = I915_CACHE_LLC; | |
3604 | } else | |
3605 | obj->cache_level = I915_CACHE_NONE; | |
3606 | ||
62b8b215 | 3607 | obj->base.driver_private = NULL; |
c397b908 | 3608 | obj->fence_reg = I915_FENCE_REG_NONE; |
69dc4987 | 3609 | INIT_LIST_HEAD(&obj->mm_list); |
93a37f20 | 3610 | INIT_LIST_HEAD(&obj->gtt_list); |
69dc4987 | 3611 | INIT_LIST_HEAD(&obj->ring_list); |
432e58ed | 3612 | INIT_LIST_HEAD(&obj->exec_list); |
c397b908 | 3613 | obj->madv = I915_MADV_WILLNEED; |
75e9e915 DV |
3614 | /* Avoid an unnecessary call to unbind on the first bind. */ |
3615 | obj->map_and_fenceable = true; | |
de151cf6 | 3616 | |
05394f39 | 3617 | return obj; |
c397b908 DV |
3618 | } |
3619 | ||
3620 | int i915_gem_init_object(struct drm_gem_object *obj) | |
3621 | { | |
3622 | BUG(); | |
de151cf6 | 3623 | |
673a394b EA |
3624 | return 0; |
3625 | } | |
3626 | ||
1488fc08 | 3627 | void i915_gem_free_object(struct drm_gem_object *gem_obj) |
673a394b | 3628 | { |
1488fc08 | 3629 | struct drm_i915_gem_object *obj = to_intel_bo(gem_obj); |
05394f39 | 3630 | struct drm_device *dev = obj->base.dev; |
be72615b | 3631 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b | 3632 | |
26e12f89 CW |
3633 | trace_i915_gem_object_destroy(obj); |
3634 | ||
1286ff73 DV |
3635 | if (gem_obj->import_attach) |
3636 | drm_prime_gem_destroy(gem_obj, obj->sg_table); | |
3637 | ||
1488fc08 CW |
3638 | if (obj->phys_obj) |
3639 | i915_gem_detach_phys_object(dev, obj); | |
3640 | ||
3641 | obj->pin_count = 0; | |
3642 | if (WARN_ON(i915_gem_object_unbind(obj) == -ERESTARTSYS)) { | |
3643 | bool was_interruptible; | |
3644 | ||
3645 | was_interruptible = dev_priv->mm.interruptible; | |
3646 | dev_priv->mm.interruptible = false; | |
3647 | ||
3648 | WARN_ON(i915_gem_object_unbind(obj)); | |
3649 | ||
3650 | dev_priv->mm.interruptible = was_interruptible; | |
3651 | } | |
3652 | ||
6c085a72 | 3653 | i915_gem_object_put_pages_gtt(obj); |
d8cb5086 | 3654 | i915_gem_object_free_mmap_offset(obj); |
de151cf6 | 3655 | |
05394f39 CW |
3656 | drm_gem_object_release(&obj->base); |
3657 | i915_gem_info_remove_obj(dev_priv, obj->base.size); | |
c397b908 | 3658 | |
05394f39 CW |
3659 | kfree(obj->bit_17); |
3660 | kfree(obj); | |
673a394b EA |
3661 | } |
3662 | ||
29105ccc CW |
3663 | int |
3664 | i915_gem_idle(struct drm_device *dev) | |
3665 | { | |
3666 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3667 | int ret; | |
28dfe52a | 3668 | |
29105ccc | 3669 | mutex_lock(&dev->struct_mutex); |
1c5d22f7 | 3670 | |
87acb0a5 | 3671 | if (dev_priv->mm.suspended) { |
29105ccc CW |
3672 | mutex_unlock(&dev->struct_mutex); |
3673 | return 0; | |
28dfe52a EA |
3674 | } |
3675 | ||
b2da9fe5 | 3676 | ret = i915_gpu_idle(dev); |
6dbe2772 KP |
3677 | if (ret) { |
3678 | mutex_unlock(&dev->struct_mutex); | |
673a394b | 3679 | return ret; |
6dbe2772 | 3680 | } |
b2da9fe5 | 3681 | i915_gem_retire_requests(dev); |
673a394b | 3682 | |
29105ccc | 3683 | /* Under UMS, be paranoid and evict. */ |
a39d7efc | 3684 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
6c085a72 | 3685 | i915_gem_evict_everything(dev); |
29105ccc | 3686 | |
312817a3 CW |
3687 | i915_gem_reset_fences(dev); |
3688 | ||
29105ccc CW |
3689 | /* Hack! Don't let anybody do execbuf while we don't control the chip. |
3690 | * We need to replace this with a semaphore, or something. | |
3691 | * And not confound mm.suspended! | |
3692 | */ | |
3693 | dev_priv->mm.suspended = 1; | |
bc0c7f14 | 3694 | del_timer_sync(&dev_priv->hangcheck_timer); |
29105ccc CW |
3695 | |
3696 | i915_kernel_lost_context(dev); | |
6dbe2772 | 3697 | i915_gem_cleanup_ringbuffer(dev); |
29105ccc | 3698 | |
6dbe2772 KP |
3699 | mutex_unlock(&dev->struct_mutex); |
3700 | ||
29105ccc CW |
3701 | /* Cancel the retire work handler, which should be idle now. */ |
3702 | cancel_delayed_work_sync(&dev_priv->mm.retire_work); | |
3703 | ||
673a394b EA |
3704 | return 0; |
3705 | } | |
3706 | ||
b9524a1e BW |
3707 | void i915_gem_l3_remap(struct drm_device *dev) |
3708 | { | |
3709 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3710 | u32 misccpctl; | |
3711 | int i; | |
3712 | ||
3713 | if (!IS_IVYBRIDGE(dev)) | |
3714 | return; | |
3715 | ||
3716 | if (!dev_priv->mm.l3_remap_info) | |
3717 | return; | |
3718 | ||
3719 | misccpctl = I915_READ(GEN7_MISCCPCTL); | |
3720 | I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE); | |
3721 | POSTING_READ(GEN7_MISCCPCTL); | |
3722 | ||
3723 | for (i = 0; i < GEN7_L3LOG_SIZE; i += 4) { | |
3724 | u32 remap = I915_READ(GEN7_L3LOG_BASE + i); | |
3725 | if (remap && remap != dev_priv->mm.l3_remap_info[i/4]) | |
3726 | DRM_DEBUG("0x%x was already programmed to %x\n", | |
3727 | GEN7_L3LOG_BASE + i, remap); | |
3728 | if (remap && !dev_priv->mm.l3_remap_info[i/4]) | |
3729 | DRM_DEBUG_DRIVER("Clearing remapped register\n"); | |
3730 | I915_WRITE(GEN7_L3LOG_BASE + i, dev_priv->mm.l3_remap_info[i/4]); | |
3731 | } | |
3732 | ||
3733 | /* Make sure all the writes land before disabling dop clock gating */ | |
3734 | POSTING_READ(GEN7_L3LOG_BASE); | |
3735 | ||
3736 | I915_WRITE(GEN7_MISCCPCTL, misccpctl); | |
3737 | } | |
3738 | ||
f691e2f4 DV |
3739 | void i915_gem_init_swizzling(struct drm_device *dev) |
3740 | { | |
3741 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3742 | ||
11782b02 | 3743 | if (INTEL_INFO(dev)->gen < 5 || |
f691e2f4 DV |
3744 | dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE) |
3745 | return; | |
3746 | ||
3747 | I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) | | |
3748 | DISP_TILE_SURFACE_SWIZZLING); | |
3749 | ||
11782b02 DV |
3750 | if (IS_GEN5(dev)) |
3751 | return; | |
3752 | ||
f691e2f4 DV |
3753 | I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL); |
3754 | if (IS_GEN6(dev)) | |
6b26c86d | 3755 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB)); |
f691e2f4 | 3756 | else |
6b26c86d | 3757 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB)); |
f691e2f4 | 3758 | } |
e21af88d DV |
3759 | |
3760 | void i915_gem_init_ppgtt(struct drm_device *dev) | |
3761 | { | |
3762 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3763 | uint32_t pd_offset; | |
3764 | struct intel_ring_buffer *ring; | |
55a254ac DV |
3765 | struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt; |
3766 | uint32_t __iomem *pd_addr; | |
3767 | uint32_t pd_entry; | |
e21af88d DV |
3768 | int i; |
3769 | ||
3770 | if (!dev_priv->mm.aliasing_ppgtt) | |
3771 | return; | |
3772 | ||
55a254ac DV |
3773 | |
3774 | pd_addr = dev_priv->mm.gtt->gtt + ppgtt->pd_offset/sizeof(uint32_t); | |
3775 | for (i = 0; i < ppgtt->num_pd_entries; i++) { | |
3776 | dma_addr_t pt_addr; | |
3777 | ||
3778 | if (dev_priv->mm.gtt->needs_dmar) | |
3779 | pt_addr = ppgtt->pt_dma_addr[i]; | |
3780 | else | |
3781 | pt_addr = page_to_phys(ppgtt->pt_pages[i]); | |
3782 | ||
3783 | pd_entry = GEN6_PDE_ADDR_ENCODE(pt_addr); | |
3784 | pd_entry |= GEN6_PDE_VALID; | |
3785 | ||
3786 | writel(pd_entry, pd_addr + i); | |
3787 | } | |
3788 | readl(pd_addr); | |
3789 | ||
3790 | pd_offset = ppgtt->pd_offset; | |
e21af88d DV |
3791 | pd_offset /= 64; /* in cachelines, */ |
3792 | pd_offset <<= 16; | |
3793 | ||
3794 | if (INTEL_INFO(dev)->gen == 6) { | |
48ecfa10 DV |
3795 | uint32_t ecochk, gab_ctl, ecobits; |
3796 | ||
3797 | ecobits = I915_READ(GAC_ECO_BITS); | |
3798 | I915_WRITE(GAC_ECO_BITS, ecobits | ECOBITS_PPGTT_CACHE64B); | |
be901a5a DV |
3799 | |
3800 | gab_ctl = I915_READ(GAB_CTL); | |
3801 | I915_WRITE(GAB_CTL, gab_ctl | GAB_CTL_CONT_AFTER_PAGEFAULT); | |
3802 | ||
3803 | ecochk = I915_READ(GAM_ECOCHK); | |
e21af88d DV |
3804 | I915_WRITE(GAM_ECOCHK, ecochk | ECOCHK_SNB_BIT | |
3805 | ECOCHK_PPGTT_CACHE64B); | |
6b26c86d | 3806 | I915_WRITE(GFX_MODE, _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE)); |
e21af88d DV |
3807 | } else if (INTEL_INFO(dev)->gen >= 7) { |
3808 | I915_WRITE(GAM_ECOCHK, ECOCHK_PPGTT_CACHE64B); | |
3809 | /* GFX_MODE is per-ring on gen7+ */ | |
3810 | } | |
3811 | ||
b4519513 | 3812 | for_each_ring(ring, dev_priv, i) { |
e21af88d DV |
3813 | if (INTEL_INFO(dev)->gen >= 7) |
3814 | I915_WRITE(RING_MODE_GEN7(ring), | |
6b26c86d | 3815 | _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE)); |
e21af88d DV |
3816 | |
3817 | I915_WRITE(RING_PP_DIR_DCLV(ring), PP_DIR_DCLV_2G); | |
3818 | I915_WRITE(RING_PP_DIR_BASE(ring), pd_offset); | |
3819 | } | |
3820 | } | |
3821 | ||
67b1b571 CW |
3822 | static bool |
3823 | intel_enable_blt(struct drm_device *dev) | |
3824 | { | |
3825 | if (!HAS_BLT(dev)) | |
3826 | return false; | |
3827 | ||
3828 | /* The blitter was dysfunctional on early prototypes */ | |
3829 | if (IS_GEN6(dev) && dev->pdev->revision < 8) { | |
3830 | DRM_INFO("BLT not supported on this pre-production hardware;" | |
3831 | " graphics performance will be degraded.\n"); | |
3832 | return false; | |
3833 | } | |
3834 | ||
3835 | return true; | |
3836 | } | |
3837 | ||
8187a2b7 | 3838 | int |
f691e2f4 | 3839 | i915_gem_init_hw(struct drm_device *dev) |
8187a2b7 ZN |
3840 | { |
3841 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3842 | int ret; | |
68f95ba9 | 3843 | |
8ecd1a66 DV |
3844 | if (!intel_enable_gtt()) |
3845 | return -EIO; | |
3846 | ||
b9524a1e BW |
3847 | i915_gem_l3_remap(dev); |
3848 | ||
f691e2f4 DV |
3849 | i915_gem_init_swizzling(dev); |
3850 | ||
5c1143bb | 3851 | ret = intel_init_render_ring_buffer(dev); |
68f95ba9 | 3852 | if (ret) |
b6913e4b | 3853 | return ret; |
68f95ba9 CW |
3854 | |
3855 | if (HAS_BSD(dev)) { | |
5c1143bb | 3856 | ret = intel_init_bsd_ring_buffer(dev); |
68f95ba9 CW |
3857 | if (ret) |
3858 | goto cleanup_render_ring; | |
d1b851fc | 3859 | } |
68f95ba9 | 3860 | |
67b1b571 | 3861 | if (intel_enable_blt(dev)) { |
549f7365 CW |
3862 | ret = intel_init_blt_ring_buffer(dev); |
3863 | if (ret) | |
3864 | goto cleanup_bsd_ring; | |
3865 | } | |
3866 | ||
6f392d54 CW |
3867 | dev_priv->next_seqno = 1; |
3868 | ||
254f965c BW |
3869 | /* |
3870 | * XXX: There was some w/a described somewhere suggesting loading | |
3871 | * contexts before PPGTT. | |
3872 | */ | |
3873 | i915_gem_context_init(dev); | |
e21af88d DV |
3874 | i915_gem_init_ppgtt(dev); |
3875 | ||
68f95ba9 CW |
3876 | return 0; |
3877 | ||
549f7365 | 3878 | cleanup_bsd_ring: |
1ec14ad3 | 3879 | intel_cleanup_ring_buffer(&dev_priv->ring[VCS]); |
68f95ba9 | 3880 | cleanup_render_ring: |
1ec14ad3 | 3881 | intel_cleanup_ring_buffer(&dev_priv->ring[RCS]); |
8187a2b7 ZN |
3882 | return ret; |
3883 | } | |
3884 | ||
1070a42b CW |
3885 | static bool |
3886 | intel_enable_ppgtt(struct drm_device *dev) | |
3887 | { | |
3888 | if (i915_enable_ppgtt >= 0) | |
3889 | return i915_enable_ppgtt; | |
3890 | ||
3891 | #ifdef CONFIG_INTEL_IOMMU | |
3892 | /* Disable ppgtt on SNB if VT-d is on. */ | |
3893 | if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped) | |
3894 | return false; | |
3895 | #endif | |
3896 | ||
3897 | return true; | |
3898 | } | |
3899 | ||
3900 | int i915_gem_init(struct drm_device *dev) | |
3901 | { | |
3902 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3903 | unsigned long gtt_size, mappable_size; | |
3904 | int ret; | |
3905 | ||
3906 | gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT; | |
3907 | mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT; | |
3908 | ||
3909 | mutex_lock(&dev->struct_mutex); | |
3910 | if (intel_enable_ppgtt(dev) && HAS_ALIASING_PPGTT(dev)) { | |
3911 | /* PPGTT pdes are stolen from global gtt ptes, so shrink the | |
3912 | * aperture accordingly when using aliasing ppgtt. */ | |
3913 | gtt_size -= I915_PPGTT_PD_ENTRIES*PAGE_SIZE; | |
3914 | ||
3915 | i915_gem_init_global_gtt(dev, 0, mappable_size, gtt_size); | |
3916 | ||
3917 | ret = i915_gem_init_aliasing_ppgtt(dev); | |
3918 | if (ret) { | |
3919 | mutex_unlock(&dev->struct_mutex); | |
3920 | return ret; | |
3921 | } | |
3922 | } else { | |
3923 | /* Let GEM Manage all of the aperture. | |
3924 | * | |
3925 | * However, leave one page at the end still bound to the scratch | |
3926 | * page. There are a number of places where the hardware | |
3927 | * apparently prefetches past the end of the object, and we've | |
3928 | * seen multiple hangs with the GPU head pointer stuck in a | |
3929 | * batchbuffer bound at the last page of the aperture. One page | |
3930 | * should be enough to keep any prefetching inside of the | |
3931 | * aperture. | |
3932 | */ | |
3933 | i915_gem_init_global_gtt(dev, 0, mappable_size, | |
3934 | gtt_size); | |
3935 | } | |
3936 | ||
3937 | ret = i915_gem_init_hw(dev); | |
3938 | mutex_unlock(&dev->struct_mutex); | |
3939 | if (ret) { | |
3940 | i915_gem_cleanup_aliasing_ppgtt(dev); | |
3941 | return ret; | |
3942 | } | |
3943 | ||
53ca26ca DV |
3944 | /* Allow hardware batchbuffers unless told otherwise, but not for KMS. */ |
3945 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
3946 | dev_priv->dri1.allow_batchbuffer = 1; | |
1070a42b CW |
3947 | return 0; |
3948 | } | |
3949 | ||
8187a2b7 ZN |
3950 | void |
3951 | i915_gem_cleanup_ringbuffer(struct drm_device *dev) | |
3952 | { | |
3953 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b4519513 | 3954 | struct intel_ring_buffer *ring; |
1ec14ad3 | 3955 | int i; |
8187a2b7 | 3956 | |
b4519513 CW |
3957 | for_each_ring(ring, dev_priv, i) |
3958 | intel_cleanup_ring_buffer(ring); | |
8187a2b7 ZN |
3959 | } |
3960 | ||
673a394b EA |
3961 | int |
3962 | i915_gem_entervt_ioctl(struct drm_device *dev, void *data, | |
3963 | struct drm_file *file_priv) | |
3964 | { | |
3965 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b4519513 | 3966 | int ret; |
673a394b | 3967 | |
79e53945 JB |
3968 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
3969 | return 0; | |
3970 | ||
ba1234d1 | 3971 | if (atomic_read(&dev_priv->mm.wedged)) { |
673a394b | 3972 | DRM_ERROR("Reenabling wedged hardware, good luck\n"); |
ba1234d1 | 3973 | atomic_set(&dev_priv->mm.wedged, 0); |
673a394b EA |
3974 | } |
3975 | ||
673a394b | 3976 | mutex_lock(&dev->struct_mutex); |
9bb2d6f9 EA |
3977 | dev_priv->mm.suspended = 0; |
3978 | ||
f691e2f4 | 3979 | ret = i915_gem_init_hw(dev); |
d816f6ac WF |
3980 | if (ret != 0) { |
3981 | mutex_unlock(&dev->struct_mutex); | |
9bb2d6f9 | 3982 | return ret; |
d816f6ac | 3983 | } |
9bb2d6f9 | 3984 | |
69dc4987 | 3985 | BUG_ON(!list_empty(&dev_priv->mm.active_list)); |
673a394b | 3986 | BUG_ON(!list_empty(&dev_priv->mm.inactive_list)); |
673a394b | 3987 | mutex_unlock(&dev->struct_mutex); |
dbb19d30 | 3988 | |
5f35308b CW |
3989 | ret = drm_irq_install(dev); |
3990 | if (ret) | |
3991 | goto cleanup_ringbuffer; | |
dbb19d30 | 3992 | |
673a394b | 3993 | return 0; |
5f35308b CW |
3994 | |
3995 | cleanup_ringbuffer: | |
3996 | mutex_lock(&dev->struct_mutex); | |
3997 | i915_gem_cleanup_ringbuffer(dev); | |
3998 | dev_priv->mm.suspended = 1; | |
3999 | mutex_unlock(&dev->struct_mutex); | |
4000 | ||
4001 | return ret; | |
673a394b EA |
4002 | } |
4003 | ||
4004 | int | |
4005 | i915_gem_leavevt_ioctl(struct drm_device *dev, void *data, | |
4006 | struct drm_file *file_priv) | |
4007 | { | |
79e53945 JB |
4008 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4009 | return 0; | |
4010 | ||
dbb19d30 | 4011 | drm_irq_uninstall(dev); |
e6890f6f | 4012 | return i915_gem_idle(dev); |
673a394b EA |
4013 | } |
4014 | ||
4015 | void | |
4016 | i915_gem_lastclose(struct drm_device *dev) | |
4017 | { | |
4018 | int ret; | |
673a394b | 4019 | |
e806b495 EA |
4020 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4021 | return; | |
4022 | ||
6dbe2772 KP |
4023 | ret = i915_gem_idle(dev); |
4024 | if (ret) | |
4025 | DRM_ERROR("failed to idle hardware: %d\n", ret); | |
673a394b EA |
4026 | } |
4027 | ||
64193406 CW |
4028 | static void |
4029 | init_ring_lists(struct intel_ring_buffer *ring) | |
4030 | { | |
4031 | INIT_LIST_HEAD(&ring->active_list); | |
4032 | INIT_LIST_HEAD(&ring->request_list); | |
64193406 CW |
4033 | } |
4034 | ||
673a394b EA |
4035 | void |
4036 | i915_gem_load(struct drm_device *dev) | |
4037 | { | |
b5aa8a0f | 4038 | int i; |
673a394b EA |
4039 | drm_i915_private_t *dev_priv = dev->dev_private; |
4040 | ||
69dc4987 | 4041 | INIT_LIST_HEAD(&dev_priv->mm.active_list); |
673a394b | 4042 | INIT_LIST_HEAD(&dev_priv->mm.inactive_list); |
6c085a72 CW |
4043 | INIT_LIST_HEAD(&dev_priv->mm.unbound_list); |
4044 | INIT_LIST_HEAD(&dev_priv->mm.bound_list); | |
a09ba7fa | 4045 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
1ec14ad3 CW |
4046 | for (i = 0; i < I915_NUM_RINGS; i++) |
4047 | init_ring_lists(&dev_priv->ring[i]); | |
4b9de737 | 4048 | for (i = 0; i < I915_MAX_NUM_FENCES; i++) |
007cc8ac | 4049 | INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list); |
673a394b EA |
4050 | INIT_DELAYED_WORK(&dev_priv->mm.retire_work, |
4051 | i915_gem_retire_work_handler); | |
30dbf0c0 | 4052 | init_completion(&dev_priv->error_completion); |
31169714 | 4053 | |
94400120 DA |
4054 | /* On GEN3 we really need to make sure the ARB C3 LP bit is set */ |
4055 | if (IS_GEN3(dev)) { | |
50743298 DV |
4056 | I915_WRITE(MI_ARB_STATE, |
4057 | _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE)); | |
94400120 DA |
4058 | } |
4059 | ||
72bfa19c CW |
4060 | dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL; |
4061 | ||
de151cf6 | 4062 | /* Old X drivers will take 0-2 for front, back, depth buffers */ |
b397c836 EA |
4063 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
4064 | dev_priv->fence_reg_start = 3; | |
de151cf6 | 4065 | |
a6c45cf0 | 4066 | if (INTEL_INFO(dev)->gen >= 4 || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) |
de151cf6 JB |
4067 | dev_priv->num_fence_regs = 16; |
4068 | else | |
4069 | dev_priv->num_fence_regs = 8; | |
4070 | ||
b5aa8a0f | 4071 | /* Initialize fence registers to zero */ |
ada726c7 | 4072 | i915_gem_reset_fences(dev); |
10ed13e4 | 4073 | |
673a394b | 4074 | i915_gem_detect_bit_6_swizzle(dev); |
6b95a207 | 4075 | init_waitqueue_head(&dev_priv->pending_flip_queue); |
17250b71 | 4076 | |
ce453d81 CW |
4077 | dev_priv->mm.interruptible = true; |
4078 | ||
17250b71 CW |
4079 | dev_priv->mm.inactive_shrinker.shrink = i915_gem_inactive_shrink; |
4080 | dev_priv->mm.inactive_shrinker.seeks = DEFAULT_SEEKS; | |
4081 | register_shrinker(&dev_priv->mm.inactive_shrinker); | |
673a394b | 4082 | } |
71acb5eb DA |
4083 | |
4084 | /* | |
4085 | * Create a physically contiguous memory object for this object | |
4086 | * e.g. for cursor + overlay regs | |
4087 | */ | |
995b6762 CW |
4088 | static int i915_gem_init_phys_object(struct drm_device *dev, |
4089 | int id, int size, int align) | |
71acb5eb DA |
4090 | { |
4091 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4092 | struct drm_i915_gem_phys_object *phys_obj; | |
4093 | int ret; | |
4094 | ||
4095 | if (dev_priv->mm.phys_objs[id - 1] || !size) | |
4096 | return 0; | |
4097 | ||
9a298b2a | 4098 | phys_obj = kzalloc(sizeof(struct drm_i915_gem_phys_object), GFP_KERNEL); |
71acb5eb DA |
4099 | if (!phys_obj) |
4100 | return -ENOMEM; | |
4101 | ||
4102 | phys_obj->id = id; | |
4103 | ||
6eeefaf3 | 4104 | phys_obj->handle = drm_pci_alloc(dev, size, align); |
71acb5eb DA |
4105 | if (!phys_obj->handle) { |
4106 | ret = -ENOMEM; | |
4107 | goto kfree_obj; | |
4108 | } | |
4109 | #ifdef CONFIG_X86 | |
4110 | set_memory_wc((unsigned long)phys_obj->handle->vaddr, phys_obj->handle->size / PAGE_SIZE); | |
4111 | #endif | |
4112 | ||
4113 | dev_priv->mm.phys_objs[id - 1] = phys_obj; | |
4114 | ||
4115 | return 0; | |
4116 | kfree_obj: | |
9a298b2a | 4117 | kfree(phys_obj); |
71acb5eb DA |
4118 | return ret; |
4119 | } | |
4120 | ||
995b6762 | 4121 | static void i915_gem_free_phys_object(struct drm_device *dev, int id) |
71acb5eb DA |
4122 | { |
4123 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4124 | struct drm_i915_gem_phys_object *phys_obj; | |
4125 | ||
4126 | if (!dev_priv->mm.phys_objs[id - 1]) | |
4127 | return; | |
4128 | ||
4129 | phys_obj = dev_priv->mm.phys_objs[id - 1]; | |
4130 | if (phys_obj->cur_obj) { | |
4131 | i915_gem_detach_phys_object(dev, phys_obj->cur_obj); | |
4132 | } | |
4133 | ||
4134 | #ifdef CONFIG_X86 | |
4135 | set_memory_wb((unsigned long)phys_obj->handle->vaddr, phys_obj->handle->size / PAGE_SIZE); | |
4136 | #endif | |
4137 | drm_pci_free(dev, phys_obj->handle); | |
4138 | kfree(phys_obj); | |
4139 | dev_priv->mm.phys_objs[id - 1] = NULL; | |
4140 | } | |
4141 | ||
4142 | void i915_gem_free_all_phys_object(struct drm_device *dev) | |
4143 | { | |
4144 | int i; | |
4145 | ||
260883c8 | 4146 | for (i = I915_GEM_PHYS_CURSOR_0; i <= I915_MAX_PHYS_OBJECT; i++) |
71acb5eb DA |
4147 | i915_gem_free_phys_object(dev, i); |
4148 | } | |
4149 | ||
4150 | void i915_gem_detach_phys_object(struct drm_device *dev, | |
05394f39 | 4151 | struct drm_i915_gem_object *obj) |
71acb5eb | 4152 | { |
05394f39 | 4153 | struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; |
e5281ccd | 4154 | char *vaddr; |
71acb5eb | 4155 | int i; |
71acb5eb DA |
4156 | int page_count; |
4157 | ||
05394f39 | 4158 | if (!obj->phys_obj) |
71acb5eb | 4159 | return; |
05394f39 | 4160 | vaddr = obj->phys_obj->handle->vaddr; |
71acb5eb | 4161 | |
05394f39 | 4162 | page_count = obj->base.size / PAGE_SIZE; |
71acb5eb | 4163 | for (i = 0; i < page_count; i++) { |
5949eac4 | 4164 | struct page *page = shmem_read_mapping_page(mapping, i); |
e5281ccd CW |
4165 | if (!IS_ERR(page)) { |
4166 | char *dst = kmap_atomic(page); | |
4167 | memcpy(dst, vaddr + i*PAGE_SIZE, PAGE_SIZE); | |
4168 | kunmap_atomic(dst); | |
4169 | ||
4170 | drm_clflush_pages(&page, 1); | |
4171 | ||
4172 | set_page_dirty(page); | |
4173 | mark_page_accessed(page); | |
4174 | page_cache_release(page); | |
4175 | } | |
71acb5eb | 4176 | } |
40ce6575 | 4177 | intel_gtt_chipset_flush(); |
d78b47b9 | 4178 | |
05394f39 CW |
4179 | obj->phys_obj->cur_obj = NULL; |
4180 | obj->phys_obj = NULL; | |
71acb5eb DA |
4181 | } |
4182 | ||
4183 | int | |
4184 | i915_gem_attach_phys_object(struct drm_device *dev, | |
05394f39 | 4185 | struct drm_i915_gem_object *obj, |
6eeefaf3 CW |
4186 | int id, |
4187 | int align) | |
71acb5eb | 4188 | { |
05394f39 | 4189 | struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; |
71acb5eb | 4190 | drm_i915_private_t *dev_priv = dev->dev_private; |
71acb5eb DA |
4191 | int ret = 0; |
4192 | int page_count; | |
4193 | int i; | |
4194 | ||
4195 | if (id > I915_MAX_PHYS_OBJECT) | |
4196 | return -EINVAL; | |
4197 | ||
05394f39 CW |
4198 | if (obj->phys_obj) { |
4199 | if (obj->phys_obj->id == id) | |
71acb5eb DA |
4200 | return 0; |
4201 | i915_gem_detach_phys_object(dev, obj); | |
4202 | } | |
4203 | ||
71acb5eb DA |
4204 | /* create a new object */ |
4205 | if (!dev_priv->mm.phys_objs[id - 1]) { | |
4206 | ret = i915_gem_init_phys_object(dev, id, | |
05394f39 | 4207 | obj->base.size, align); |
71acb5eb | 4208 | if (ret) { |
05394f39 CW |
4209 | DRM_ERROR("failed to init phys object %d size: %zu\n", |
4210 | id, obj->base.size); | |
e5281ccd | 4211 | return ret; |
71acb5eb DA |
4212 | } |
4213 | } | |
4214 | ||
4215 | /* bind to the object */ | |
05394f39 CW |
4216 | obj->phys_obj = dev_priv->mm.phys_objs[id - 1]; |
4217 | obj->phys_obj->cur_obj = obj; | |
71acb5eb | 4218 | |
05394f39 | 4219 | page_count = obj->base.size / PAGE_SIZE; |
71acb5eb DA |
4220 | |
4221 | for (i = 0; i < page_count; i++) { | |
e5281ccd CW |
4222 | struct page *page; |
4223 | char *dst, *src; | |
4224 | ||
5949eac4 | 4225 | page = shmem_read_mapping_page(mapping, i); |
e5281ccd CW |
4226 | if (IS_ERR(page)) |
4227 | return PTR_ERR(page); | |
71acb5eb | 4228 | |
ff75b9bc | 4229 | src = kmap_atomic(page); |
05394f39 | 4230 | dst = obj->phys_obj->handle->vaddr + (i * PAGE_SIZE); |
71acb5eb | 4231 | memcpy(dst, src, PAGE_SIZE); |
3e4d3af5 | 4232 | kunmap_atomic(src); |
71acb5eb | 4233 | |
e5281ccd CW |
4234 | mark_page_accessed(page); |
4235 | page_cache_release(page); | |
4236 | } | |
d78b47b9 | 4237 | |
71acb5eb | 4238 | return 0; |
71acb5eb DA |
4239 | } |
4240 | ||
4241 | static int | |
05394f39 CW |
4242 | i915_gem_phys_pwrite(struct drm_device *dev, |
4243 | struct drm_i915_gem_object *obj, | |
71acb5eb DA |
4244 | struct drm_i915_gem_pwrite *args, |
4245 | struct drm_file *file_priv) | |
4246 | { | |
05394f39 | 4247 | void *vaddr = obj->phys_obj->handle->vaddr + args->offset; |
b47b30cc | 4248 | char __user *user_data = (char __user *) (uintptr_t) args->data_ptr; |
71acb5eb | 4249 | |
b47b30cc CW |
4250 | if (__copy_from_user_inatomic_nocache(vaddr, user_data, args->size)) { |
4251 | unsigned long unwritten; | |
4252 | ||
4253 | /* The physical object once assigned is fixed for the lifetime | |
4254 | * of the obj, so we can safely drop the lock and continue | |
4255 | * to access vaddr. | |
4256 | */ | |
4257 | mutex_unlock(&dev->struct_mutex); | |
4258 | unwritten = copy_from_user(vaddr, user_data, args->size); | |
4259 | mutex_lock(&dev->struct_mutex); | |
4260 | if (unwritten) | |
4261 | return -EFAULT; | |
4262 | } | |
71acb5eb | 4263 | |
40ce6575 | 4264 | intel_gtt_chipset_flush(); |
71acb5eb DA |
4265 | return 0; |
4266 | } | |
b962442e | 4267 | |
f787a5f5 | 4268 | void i915_gem_release(struct drm_device *dev, struct drm_file *file) |
b962442e | 4269 | { |
f787a5f5 | 4270 | struct drm_i915_file_private *file_priv = file->driver_priv; |
b962442e EA |
4271 | |
4272 | /* Clean up our request list when the client is going away, so that | |
4273 | * later retire_requests won't dereference our soon-to-be-gone | |
4274 | * file_priv. | |
4275 | */ | |
1c25595f | 4276 | spin_lock(&file_priv->mm.lock); |
f787a5f5 CW |
4277 | while (!list_empty(&file_priv->mm.request_list)) { |
4278 | struct drm_i915_gem_request *request; | |
4279 | ||
4280 | request = list_first_entry(&file_priv->mm.request_list, | |
4281 | struct drm_i915_gem_request, | |
4282 | client_list); | |
4283 | list_del(&request->client_list); | |
4284 | request->file_priv = NULL; | |
4285 | } | |
1c25595f | 4286 | spin_unlock(&file_priv->mm.lock); |
b962442e | 4287 | } |
31169714 | 4288 | |
31169714 | 4289 | static int |
1495f230 | 4290 | i915_gem_inactive_shrink(struct shrinker *shrinker, struct shrink_control *sc) |
31169714 | 4291 | { |
17250b71 CW |
4292 | struct drm_i915_private *dev_priv = |
4293 | container_of(shrinker, | |
4294 | struct drm_i915_private, | |
4295 | mm.inactive_shrinker); | |
4296 | struct drm_device *dev = dev_priv->dev; | |
6c085a72 | 4297 | struct drm_i915_gem_object *obj; |
1495f230 | 4298 | int nr_to_scan = sc->nr_to_scan; |
17250b71 CW |
4299 | int cnt; |
4300 | ||
4301 | if (!mutex_trylock(&dev->struct_mutex)) | |
bbe2e11a | 4302 | return 0; |
31169714 | 4303 | |
6c085a72 CW |
4304 | if (nr_to_scan) { |
4305 | nr_to_scan -= i915_gem_purge(dev_priv, nr_to_scan); | |
4306 | if (nr_to_scan > 0) | |
4307 | i915_gem_shrink_all(dev_priv); | |
31169714 CW |
4308 | } |
4309 | ||
17250b71 | 4310 | cnt = 0; |
6c085a72 CW |
4311 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, gtt_list) |
4312 | cnt += obj->base.size >> PAGE_SHIFT; | |
4313 | list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list) | |
4314 | if (obj->pin_count == 0) | |
4315 | cnt += obj->base.size >> PAGE_SHIFT; | |
17250b71 | 4316 | |
17250b71 | 4317 | mutex_unlock(&dev->struct_mutex); |
6c085a72 | 4318 | return cnt; |
31169714 | 4319 | } |