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673a394b EA |
1 | /* |
2 | * Copyright © 2008 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Eric Anholt <eric@anholt.net> | |
25 | * | |
26 | */ | |
27 | ||
28 | #include "drmP.h" | |
29 | #include "drm.h" | |
30 | #include "i915_drm.h" | |
31 | #include "i915_drv.h" | |
652c393a | 32 | #include "intel_drv.h" |
673a394b | 33 | #include <linux/swap.h> |
79e53945 | 34 | #include <linux/pci.h> |
673a394b | 35 | |
28dfe52a EA |
36 | #define I915_GEM_GPU_DOMAINS (~(I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT)) |
37 | ||
e47c68e9 EA |
38 | static void i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj); |
39 | static void i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj); | |
40 | static void i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj); | |
e47c68e9 EA |
41 | static int i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, |
42 | int write); | |
43 | static int i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj, | |
44 | uint64_t offset, | |
45 | uint64_t size); | |
46 | static void i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object *obj); | |
673a394b | 47 | static int i915_gem_object_wait_rendering(struct drm_gem_object *obj); |
de151cf6 JB |
48 | static int i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, |
49 | unsigned alignment); | |
de151cf6 JB |
50 | static void i915_gem_clear_fence_reg(struct drm_gem_object *obj); |
51 | static int i915_gem_evict_something(struct drm_device *dev); | |
71acb5eb DA |
52 | static int i915_gem_phys_pwrite(struct drm_device *dev, struct drm_gem_object *obj, |
53 | struct drm_i915_gem_pwrite *args, | |
54 | struct drm_file *file_priv); | |
673a394b | 55 | |
31169714 CW |
56 | static LIST_HEAD(shrink_list); |
57 | static DEFINE_SPINLOCK(shrink_list_lock); | |
58 | ||
79e53945 JB |
59 | int i915_gem_do_init(struct drm_device *dev, unsigned long start, |
60 | unsigned long end) | |
673a394b EA |
61 | { |
62 | drm_i915_private_t *dev_priv = dev->dev_private; | |
673a394b | 63 | |
79e53945 JB |
64 | if (start >= end || |
65 | (start & (PAGE_SIZE - 1)) != 0 || | |
66 | (end & (PAGE_SIZE - 1)) != 0) { | |
673a394b EA |
67 | return -EINVAL; |
68 | } | |
69 | ||
79e53945 JB |
70 | drm_mm_init(&dev_priv->mm.gtt_space, start, |
71 | end - start); | |
673a394b | 72 | |
79e53945 JB |
73 | dev->gtt_total = (uint32_t) (end - start); |
74 | ||
75 | return 0; | |
76 | } | |
673a394b | 77 | |
79e53945 JB |
78 | int |
79 | i915_gem_init_ioctl(struct drm_device *dev, void *data, | |
80 | struct drm_file *file_priv) | |
81 | { | |
82 | struct drm_i915_gem_init *args = data; | |
83 | int ret; | |
84 | ||
85 | mutex_lock(&dev->struct_mutex); | |
86 | ret = i915_gem_do_init(dev, args->gtt_start, args->gtt_end); | |
673a394b EA |
87 | mutex_unlock(&dev->struct_mutex); |
88 | ||
79e53945 | 89 | return ret; |
673a394b EA |
90 | } |
91 | ||
5a125c3c EA |
92 | int |
93 | i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, | |
94 | struct drm_file *file_priv) | |
95 | { | |
5a125c3c | 96 | struct drm_i915_gem_get_aperture *args = data; |
5a125c3c EA |
97 | |
98 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
99 | return -ENODEV; | |
100 | ||
101 | args->aper_size = dev->gtt_total; | |
2678d9d6 KP |
102 | args->aper_available_size = (args->aper_size - |
103 | atomic_read(&dev->pin_memory)); | |
5a125c3c EA |
104 | |
105 | return 0; | |
106 | } | |
107 | ||
673a394b EA |
108 | |
109 | /** | |
110 | * Creates a new mm object and returns a handle to it. | |
111 | */ | |
112 | int | |
113 | i915_gem_create_ioctl(struct drm_device *dev, void *data, | |
114 | struct drm_file *file_priv) | |
115 | { | |
116 | struct drm_i915_gem_create *args = data; | |
117 | struct drm_gem_object *obj; | |
a1a2d1d3 PP |
118 | int ret; |
119 | u32 handle; | |
673a394b EA |
120 | |
121 | args->size = roundup(args->size, PAGE_SIZE); | |
122 | ||
123 | /* Allocate the new object */ | |
124 | obj = drm_gem_object_alloc(dev, args->size); | |
125 | if (obj == NULL) | |
126 | return -ENOMEM; | |
127 | ||
128 | ret = drm_gem_handle_create(file_priv, obj, &handle); | |
129 | mutex_lock(&dev->struct_mutex); | |
130 | drm_gem_object_handle_unreference(obj); | |
131 | mutex_unlock(&dev->struct_mutex); | |
132 | ||
133 | if (ret) | |
134 | return ret; | |
135 | ||
136 | args->handle = handle; | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
eb01459f EA |
141 | static inline int |
142 | fast_shmem_read(struct page **pages, | |
143 | loff_t page_base, int page_offset, | |
144 | char __user *data, | |
145 | int length) | |
146 | { | |
147 | char __iomem *vaddr; | |
2bc43b5c | 148 | int unwritten; |
eb01459f EA |
149 | |
150 | vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0); | |
151 | if (vaddr == NULL) | |
152 | return -ENOMEM; | |
2bc43b5c | 153 | unwritten = __copy_to_user_inatomic(data, vaddr + page_offset, length); |
eb01459f EA |
154 | kunmap_atomic(vaddr, KM_USER0); |
155 | ||
2bc43b5c FM |
156 | if (unwritten) |
157 | return -EFAULT; | |
158 | ||
159 | return 0; | |
eb01459f EA |
160 | } |
161 | ||
280b713b EA |
162 | static int i915_gem_object_needs_bit17_swizzle(struct drm_gem_object *obj) |
163 | { | |
164 | drm_i915_private_t *dev_priv = obj->dev->dev_private; | |
165 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
166 | ||
167 | return dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 && | |
168 | obj_priv->tiling_mode != I915_TILING_NONE; | |
169 | } | |
170 | ||
40123c1f EA |
171 | static inline int |
172 | slow_shmem_copy(struct page *dst_page, | |
173 | int dst_offset, | |
174 | struct page *src_page, | |
175 | int src_offset, | |
176 | int length) | |
177 | { | |
178 | char *dst_vaddr, *src_vaddr; | |
179 | ||
180 | dst_vaddr = kmap_atomic(dst_page, KM_USER0); | |
181 | if (dst_vaddr == NULL) | |
182 | return -ENOMEM; | |
183 | ||
184 | src_vaddr = kmap_atomic(src_page, KM_USER1); | |
185 | if (src_vaddr == NULL) { | |
186 | kunmap_atomic(dst_vaddr, KM_USER0); | |
187 | return -ENOMEM; | |
188 | } | |
189 | ||
190 | memcpy(dst_vaddr + dst_offset, src_vaddr + src_offset, length); | |
191 | ||
192 | kunmap_atomic(src_vaddr, KM_USER1); | |
193 | kunmap_atomic(dst_vaddr, KM_USER0); | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
280b713b EA |
198 | static inline int |
199 | slow_shmem_bit17_copy(struct page *gpu_page, | |
200 | int gpu_offset, | |
201 | struct page *cpu_page, | |
202 | int cpu_offset, | |
203 | int length, | |
204 | int is_read) | |
205 | { | |
206 | char *gpu_vaddr, *cpu_vaddr; | |
207 | ||
208 | /* Use the unswizzled path if this page isn't affected. */ | |
209 | if ((page_to_phys(gpu_page) & (1 << 17)) == 0) { | |
210 | if (is_read) | |
211 | return slow_shmem_copy(cpu_page, cpu_offset, | |
212 | gpu_page, gpu_offset, length); | |
213 | else | |
214 | return slow_shmem_copy(gpu_page, gpu_offset, | |
215 | cpu_page, cpu_offset, length); | |
216 | } | |
217 | ||
218 | gpu_vaddr = kmap_atomic(gpu_page, KM_USER0); | |
219 | if (gpu_vaddr == NULL) | |
220 | return -ENOMEM; | |
221 | ||
222 | cpu_vaddr = kmap_atomic(cpu_page, KM_USER1); | |
223 | if (cpu_vaddr == NULL) { | |
224 | kunmap_atomic(gpu_vaddr, KM_USER0); | |
225 | return -ENOMEM; | |
226 | } | |
227 | ||
228 | /* Copy the data, XORing A6 with A17 (1). The user already knows he's | |
229 | * XORing with the other bits (A9 for Y, A9 and A10 for X) | |
230 | */ | |
231 | while (length > 0) { | |
232 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
233 | int this_length = min(cacheline_end - gpu_offset, length); | |
234 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
235 | ||
236 | if (is_read) { | |
237 | memcpy(cpu_vaddr + cpu_offset, | |
238 | gpu_vaddr + swizzled_gpu_offset, | |
239 | this_length); | |
240 | } else { | |
241 | memcpy(gpu_vaddr + swizzled_gpu_offset, | |
242 | cpu_vaddr + cpu_offset, | |
243 | this_length); | |
244 | } | |
245 | cpu_offset += this_length; | |
246 | gpu_offset += this_length; | |
247 | length -= this_length; | |
248 | } | |
249 | ||
250 | kunmap_atomic(cpu_vaddr, KM_USER1); | |
251 | kunmap_atomic(gpu_vaddr, KM_USER0); | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
eb01459f EA |
256 | /** |
257 | * This is the fast shmem pread path, which attempts to copy_from_user directly | |
258 | * from the backing pages of the object to the user's address space. On a | |
259 | * fault, it fails so we can fall back to i915_gem_shmem_pwrite_slow(). | |
260 | */ | |
261 | static int | |
262 | i915_gem_shmem_pread_fast(struct drm_device *dev, struct drm_gem_object *obj, | |
263 | struct drm_i915_gem_pread *args, | |
264 | struct drm_file *file_priv) | |
265 | { | |
266 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
267 | ssize_t remain; | |
268 | loff_t offset, page_base; | |
269 | char __user *user_data; | |
270 | int page_offset, page_length; | |
271 | int ret; | |
272 | ||
273 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
274 | remain = args->size; | |
275 | ||
276 | mutex_lock(&dev->struct_mutex); | |
277 | ||
278 | ret = i915_gem_object_get_pages(obj); | |
279 | if (ret != 0) | |
280 | goto fail_unlock; | |
281 | ||
282 | ret = i915_gem_object_set_cpu_read_domain_range(obj, args->offset, | |
283 | args->size); | |
284 | if (ret != 0) | |
285 | goto fail_put_pages; | |
286 | ||
287 | obj_priv = obj->driver_private; | |
288 | offset = args->offset; | |
289 | ||
290 | while (remain > 0) { | |
291 | /* Operation in this page | |
292 | * | |
293 | * page_base = page offset within aperture | |
294 | * page_offset = offset within page | |
295 | * page_length = bytes to copy for this page | |
296 | */ | |
297 | page_base = (offset & ~(PAGE_SIZE-1)); | |
298 | page_offset = offset & (PAGE_SIZE-1); | |
299 | page_length = remain; | |
300 | if ((page_offset + remain) > PAGE_SIZE) | |
301 | page_length = PAGE_SIZE - page_offset; | |
302 | ||
303 | ret = fast_shmem_read(obj_priv->pages, | |
304 | page_base, page_offset, | |
305 | user_data, page_length); | |
306 | if (ret) | |
307 | goto fail_put_pages; | |
308 | ||
309 | remain -= page_length; | |
310 | user_data += page_length; | |
311 | offset += page_length; | |
312 | } | |
313 | ||
314 | fail_put_pages: | |
315 | i915_gem_object_put_pages(obj); | |
316 | fail_unlock: | |
317 | mutex_unlock(&dev->struct_mutex); | |
318 | ||
319 | return ret; | |
320 | } | |
321 | ||
322 | /** | |
323 | * This is the fallback shmem pread path, which allocates temporary storage | |
324 | * in kernel space to copy_to_user into outside of the struct_mutex, so we | |
325 | * can copy out of the object's backing pages while holding the struct mutex | |
326 | * and not take page faults. | |
327 | */ | |
328 | static int | |
329 | i915_gem_shmem_pread_slow(struct drm_device *dev, struct drm_gem_object *obj, | |
330 | struct drm_i915_gem_pread *args, | |
331 | struct drm_file *file_priv) | |
332 | { | |
333 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
334 | struct mm_struct *mm = current->mm; | |
335 | struct page **user_pages; | |
336 | ssize_t remain; | |
337 | loff_t offset, pinned_pages, i; | |
338 | loff_t first_data_page, last_data_page, num_pages; | |
339 | int shmem_page_index, shmem_page_offset; | |
340 | int data_page_index, data_page_offset; | |
341 | int page_length; | |
342 | int ret; | |
343 | uint64_t data_ptr = args->data_ptr; | |
280b713b | 344 | int do_bit17_swizzling; |
eb01459f EA |
345 | |
346 | remain = args->size; | |
347 | ||
348 | /* Pin the user pages containing the data. We can't fault while | |
349 | * holding the struct mutex, yet we want to hold it while | |
350 | * dereferencing the user data. | |
351 | */ | |
352 | first_data_page = data_ptr / PAGE_SIZE; | |
353 | last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; | |
354 | num_pages = last_data_page - first_data_page + 1; | |
355 | ||
8e7d2b2c | 356 | user_pages = drm_calloc_large(num_pages, sizeof(struct page *)); |
eb01459f EA |
357 | if (user_pages == NULL) |
358 | return -ENOMEM; | |
359 | ||
360 | down_read(&mm->mmap_sem); | |
361 | pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, | |
e5e9ecde | 362 | num_pages, 1, 0, user_pages, NULL); |
eb01459f EA |
363 | up_read(&mm->mmap_sem); |
364 | if (pinned_pages < num_pages) { | |
365 | ret = -EFAULT; | |
366 | goto fail_put_user_pages; | |
367 | } | |
368 | ||
280b713b EA |
369 | do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
370 | ||
eb01459f EA |
371 | mutex_lock(&dev->struct_mutex); |
372 | ||
373 | ret = i915_gem_object_get_pages(obj); | |
374 | if (ret != 0) | |
375 | goto fail_unlock; | |
376 | ||
377 | ret = i915_gem_object_set_cpu_read_domain_range(obj, args->offset, | |
378 | args->size); | |
379 | if (ret != 0) | |
380 | goto fail_put_pages; | |
381 | ||
382 | obj_priv = obj->driver_private; | |
383 | offset = args->offset; | |
384 | ||
385 | while (remain > 0) { | |
386 | /* Operation in this page | |
387 | * | |
388 | * shmem_page_index = page number within shmem file | |
389 | * shmem_page_offset = offset within page in shmem file | |
390 | * data_page_index = page number in get_user_pages return | |
391 | * data_page_offset = offset with data_page_index page. | |
392 | * page_length = bytes to copy for this page | |
393 | */ | |
394 | shmem_page_index = offset / PAGE_SIZE; | |
395 | shmem_page_offset = offset & ~PAGE_MASK; | |
396 | data_page_index = data_ptr / PAGE_SIZE - first_data_page; | |
397 | data_page_offset = data_ptr & ~PAGE_MASK; | |
398 | ||
399 | page_length = remain; | |
400 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
401 | page_length = PAGE_SIZE - shmem_page_offset; | |
402 | if ((data_page_offset + page_length) > PAGE_SIZE) | |
403 | page_length = PAGE_SIZE - data_page_offset; | |
404 | ||
280b713b EA |
405 | if (do_bit17_swizzling) { |
406 | ret = slow_shmem_bit17_copy(obj_priv->pages[shmem_page_index], | |
407 | shmem_page_offset, | |
408 | user_pages[data_page_index], | |
409 | data_page_offset, | |
410 | page_length, | |
411 | 1); | |
412 | } else { | |
413 | ret = slow_shmem_copy(user_pages[data_page_index], | |
414 | data_page_offset, | |
415 | obj_priv->pages[shmem_page_index], | |
416 | shmem_page_offset, | |
417 | page_length); | |
418 | } | |
eb01459f EA |
419 | if (ret) |
420 | goto fail_put_pages; | |
421 | ||
422 | remain -= page_length; | |
423 | data_ptr += page_length; | |
424 | offset += page_length; | |
425 | } | |
426 | ||
427 | fail_put_pages: | |
428 | i915_gem_object_put_pages(obj); | |
429 | fail_unlock: | |
430 | mutex_unlock(&dev->struct_mutex); | |
431 | fail_put_user_pages: | |
432 | for (i = 0; i < pinned_pages; i++) { | |
433 | SetPageDirty(user_pages[i]); | |
434 | page_cache_release(user_pages[i]); | |
435 | } | |
8e7d2b2c | 436 | drm_free_large(user_pages); |
eb01459f EA |
437 | |
438 | return ret; | |
439 | } | |
440 | ||
673a394b EA |
441 | /** |
442 | * Reads data from the object referenced by handle. | |
443 | * | |
444 | * On error, the contents of *data are undefined. | |
445 | */ | |
446 | int | |
447 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, | |
448 | struct drm_file *file_priv) | |
449 | { | |
450 | struct drm_i915_gem_pread *args = data; | |
451 | struct drm_gem_object *obj; | |
452 | struct drm_i915_gem_object *obj_priv; | |
673a394b EA |
453 | int ret; |
454 | ||
455 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
456 | if (obj == NULL) | |
457 | return -EBADF; | |
458 | obj_priv = obj->driver_private; | |
459 | ||
460 | /* Bounds check source. | |
461 | * | |
462 | * XXX: This could use review for overflow issues... | |
463 | */ | |
464 | if (args->offset > obj->size || args->size > obj->size || | |
465 | args->offset + args->size > obj->size) { | |
466 | drm_gem_object_unreference(obj); | |
467 | return -EINVAL; | |
468 | } | |
469 | ||
280b713b | 470 | if (i915_gem_object_needs_bit17_swizzle(obj)) { |
eb01459f | 471 | ret = i915_gem_shmem_pread_slow(dev, obj, args, file_priv); |
280b713b EA |
472 | } else { |
473 | ret = i915_gem_shmem_pread_fast(dev, obj, args, file_priv); | |
474 | if (ret != 0) | |
475 | ret = i915_gem_shmem_pread_slow(dev, obj, args, | |
476 | file_priv); | |
477 | } | |
673a394b EA |
478 | |
479 | drm_gem_object_unreference(obj); | |
673a394b | 480 | |
eb01459f | 481 | return ret; |
673a394b EA |
482 | } |
483 | ||
0839ccb8 KP |
484 | /* This is the fast write path which cannot handle |
485 | * page faults in the source data | |
9b7530cc | 486 | */ |
0839ccb8 KP |
487 | |
488 | static inline int | |
489 | fast_user_write(struct io_mapping *mapping, | |
490 | loff_t page_base, int page_offset, | |
491 | char __user *user_data, | |
492 | int length) | |
9b7530cc | 493 | { |
9b7530cc | 494 | char *vaddr_atomic; |
0839ccb8 | 495 | unsigned long unwritten; |
9b7530cc | 496 | |
0839ccb8 KP |
497 | vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base); |
498 | unwritten = __copy_from_user_inatomic_nocache(vaddr_atomic + page_offset, | |
499 | user_data, length); | |
500 | io_mapping_unmap_atomic(vaddr_atomic); | |
501 | if (unwritten) | |
502 | return -EFAULT; | |
503 | return 0; | |
504 | } | |
505 | ||
506 | /* Here's the write path which can sleep for | |
507 | * page faults | |
508 | */ | |
509 | ||
510 | static inline int | |
3de09aa3 EA |
511 | slow_kernel_write(struct io_mapping *mapping, |
512 | loff_t gtt_base, int gtt_offset, | |
513 | struct page *user_page, int user_offset, | |
514 | int length) | |
0839ccb8 | 515 | { |
3de09aa3 | 516 | char *src_vaddr, *dst_vaddr; |
0839ccb8 KP |
517 | unsigned long unwritten; |
518 | ||
3de09aa3 EA |
519 | dst_vaddr = io_mapping_map_atomic_wc(mapping, gtt_base); |
520 | src_vaddr = kmap_atomic(user_page, KM_USER1); | |
521 | unwritten = __copy_from_user_inatomic_nocache(dst_vaddr + gtt_offset, | |
522 | src_vaddr + user_offset, | |
523 | length); | |
524 | kunmap_atomic(src_vaddr, KM_USER1); | |
525 | io_mapping_unmap_atomic(dst_vaddr); | |
0839ccb8 KP |
526 | if (unwritten) |
527 | return -EFAULT; | |
9b7530cc | 528 | return 0; |
9b7530cc LT |
529 | } |
530 | ||
40123c1f EA |
531 | static inline int |
532 | fast_shmem_write(struct page **pages, | |
533 | loff_t page_base, int page_offset, | |
534 | char __user *data, | |
535 | int length) | |
536 | { | |
537 | char __iomem *vaddr; | |
d0088775 | 538 | unsigned long unwritten; |
40123c1f EA |
539 | |
540 | vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0); | |
541 | if (vaddr == NULL) | |
542 | return -ENOMEM; | |
d0088775 | 543 | unwritten = __copy_from_user_inatomic(vaddr + page_offset, data, length); |
40123c1f EA |
544 | kunmap_atomic(vaddr, KM_USER0); |
545 | ||
d0088775 DA |
546 | if (unwritten) |
547 | return -EFAULT; | |
40123c1f EA |
548 | return 0; |
549 | } | |
550 | ||
3de09aa3 EA |
551 | /** |
552 | * This is the fast pwrite path, where we copy the data directly from the | |
553 | * user into the GTT, uncached. | |
554 | */ | |
673a394b | 555 | static int |
3de09aa3 EA |
556 | i915_gem_gtt_pwrite_fast(struct drm_device *dev, struct drm_gem_object *obj, |
557 | struct drm_i915_gem_pwrite *args, | |
558 | struct drm_file *file_priv) | |
673a394b EA |
559 | { |
560 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
0839ccb8 | 561 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b | 562 | ssize_t remain; |
0839ccb8 | 563 | loff_t offset, page_base; |
673a394b | 564 | char __user *user_data; |
0839ccb8 KP |
565 | int page_offset, page_length; |
566 | int ret; | |
673a394b EA |
567 | |
568 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
569 | remain = args->size; | |
570 | if (!access_ok(VERIFY_READ, user_data, remain)) | |
571 | return -EFAULT; | |
572 | ||
573 | ||
574 | mutex_lock(&dev->struct_mutex); | |
575 | ret = i915_gem_object_pin(obj, 0); | |
576 | if (ret) { | |
577 | mutex_unlock(&dev->struct_mutex); | |
578 | return ret; | |
579 | } | |
2ef7eeaa | 580 | ret = i915_gem_object_set_to_gtt_domain(obj, 1); |
673a394b EA |
581 | if (ret) |
582 | goto fail; | |
583 | ||
584 | obj_priv = obj->driver_private; | |
585 | offset = obj_priv->gtt_offset + args->offset; | |
673a394b EA |
586 | |
587 | while (remain > 0) { | |
588 | /* Operation in this page | |
589 | * | |
0839ccb8 KP |
590 | * page_base = page offset within aperture |
591 | * page_offset = offset within page | |
592 | * page_length = bytes to copy for this page | |
673a394b | 593 | */ |
0839ccb8 KP |
594 | page_base = (offset & ~(PAGE_SIZE-1)); |
595 | page_offset = offset & (PAGE_SIZE-1); | |
596 | page_length = remain; | |
597 | if ((page_offset + remain) > PAGE_SIZE) | |
598 | page_length = PAGE_SIZE - page_offset; | |
599 | ||
600 | ret = fast_user_write (dev_priv->mm.gtt_mapping, page_base, | |
601 | page_offset, user_data, page_length); | |
602 | ||
603 | /* If we get a fault while copying data, then (presumably) our | |
3de09aa3 EA |
604 | * source page isn't available. Return the error and we'll |
605 | * retry in the slow path. | |
0839ccb8 | 606 | */ |
3de09aa3 EA |
607 | if (ret) |
608 | goto fail; | |
673a394b | 609 | |
0839ccb8 KP |
610 | remain -= page_length; |
611 | user_data += page_length; | |
612 | offset += page_length; | |
673a394b | 613 | } |
673a394b EA |
614 | |
615 | fail: | |
616 | i915_gem_object_unpin(obj); | |
617 | mutex_unlock(&dev->struct_mutex); | |
618 | ||
619 | return ret; | |
620 | } | |
621 | ||
3de09aa3 EA |
622 | /** |
623 | * This is the fallback GTT pwrite path, which uses get_user_pages to pin | |
624 | * the memory and maps it using kmap_atomic for copying. | |
625 | * | |
626 | * This code resulted in x11perf -rgb10text consuming about 10% more CPU | |
627 | * than using i915_gem_gtt_pwrite_fast on a G45 (32-bit). | |
628 | */ | |
3043c60c | 629 | static int |
3de09aa3 EA |
630 | i915_gem_gtt_pwrite_slow(struct drm_device *dev, struct drm_gem_object *obj, |
631 | struct drm_i915_gem_pwrite *args, | |
632 | struct drm_file *file_priv) | |
673a394b | 633 | { |
3de09aa3 EA |
634 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
635 | drm_i915_private_t *dev_priv = dev->dev_private; | |
636 | ssize_t remain; | |
637 | loff_t gtt_page_base, offset; | |
638 | loff_t first_data_page, last_data_page, num_pages; | |
639 | loff_t pinned_pages, i; | |
640 | struct page **user_pages; | |
641 | struct mm_struct *mm = current->mm; | |
642 | int gtt_page_offset, data_page_offset, data_page_index, page_length; | |
673a394b | 643 | int ret; |
3de09aa3 EA |
644 | uint64_t data_ptr = args->data_ptr; |
645 | ||
646 | remain = args->size; | |
647 | ||
648 | /* Pin the user pages containing the data. We can't fault while | |
649 | * holding the struct mutex, and all of the pwrite implementations | |
650 | * want to hold it while dereferencing the user data. | |
651 | */ | |
652 | first_data_page = data_ptr / PAGE_SIZE; | |
653 | last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; | |
654 | num_pages = last_data_page - first_data_page + 1; | |
655 | ||
8e7d2b2c | 656 | user_pages = drm_calloc_large(num_pages, sizeof(struct page *)); |
3de09aa3 EA |
657 | if (user_pages == NULL) |
658 | return -ENOMEM; | |
659 | ||
660 | down_read(&mm->mmap_sem); | |
661 | pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, | |
662 | num_pages, 0, 0, user_pages, NULL); | |
663 | up_read(&mm->mmap_sem); | |
664 | if (pinned_pages < num_pages) { | |
665 | ret = -EFAULT; | |
666 | goto out_unpin_pages; | |
667 | } | |
673a394b EA |
668 | |
669 | mutex_lock(&dev->struct_mutex); | |
3de09aa3 EA |
670 | ret = i915_gem_object_pin(obj, 0); |
671 | if (ret) | |
672 | goto out_unlock; | |
673 | ||
674 | ret = i915_gem_object_set_to_gtt_domain(obj, 1); | |
675 | if (ret) | |
676 | goto out_unpin_object; | |
677 | ||
678 | obj_priv = obj->driver_private; | |
679 | offset = obj_priv->gtt_offset + args->offset; | |
680 | ||
681 | while (remain > 0) { | |
682 | /* Operation in this page | |
683 | * | |
684 | * gtt_page_base = page offset within aperture | |
685 | * gtt_page_offset = offset within page in aperture | |
686 | * data_page_index = page number in get_user_pages return | |
687 | * data_page_offset = offset with data_page_index page. | |
688 | * page_length = bytes to copy for this page | |
689 | */ | |
690 | gtt_page_base = offset & PAGE_MASK; | |
691 | gtt_page_offset = offset & ~PAGE_MASK; | |
692 | data_page_index = data_ptr / PAGE_SIZE - first_data_page; | |
693 | data_page_offset = data_ptr & ~PAGE_MASK; | |
694 | ||
695 | page_length = remain; | |
696 | if ((gtt_page_offset + page_length) > PAGE_SIZE) | |
697 | page_length = PAGE_SIZE - gtt_page_offset; | |
698 | if ((data_page_offset + page_length) > PAGE_SIZE) | |
699 | page_length = PAGE_SIZE - data_page_offset; | |
700 | ||
701 | ret = slow_kernel_write(dev_priv->mm.gtt_mapping, | |
702 | gtt_page_base, gtt_page_offset, | |
703 | user_pages[data_page_index], | |
704 | data_page_offset, | |
705 | page_length); | |
706 | ||
707 | /* If we get a fault while copying data, then (presumably) our | |
708 | * source page isn't available. Return the error and we'll | |
709 | * retry in the slow path. | |
710 | */ | |
711 | if (ret) | |
712 | goto out_unpin_object; | |
713 | ||
714 | remain -= page_length; | |
715 | offset += page_length; | |
716 | data_ptr += page_length; | |
717 | } | |
718 | ||
719 | out_unpin_object: | |
720 | i915_gem_object_unpin(obj); | |
721 | out_unlock: | |
722 | mutex_unlock(&dev->struct_mutex); | |
723 | out_unpin_pages: | |
724 | for (i = 0; i < pinned_pages; i++) | |
725 | page_cache_release(user_pages[i]); | |
8e7d2b2c | 726 | drm_free_large(user_pages); |
3de09aa3 EA |
727 | |
728 | return ret; | |
729 | } | |
730 | ||
40123c1f EA |
731 | /** |
732 | * This is the fast shmem pwrite path, which attempts to directly | |
733 | * copy_from_user into the kmapped pages backing the object. | |
734 | */ | |
3043c60c | 735 | static int |
40123c1f EA |
736 | i915_gem_shmem_pwrite_fast(struct drm_device *dev, struct drm_gem_object *obj, |
737 | struct drm_i915_gem_pwrite *args, | |
738 | struct drm_file *file_priv) | |
673a394b | 739 | { |
40123c1f EA |
740 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
741 | ssize_t remain; | |
742 | loff_t offset, page_base; | |
743 | char __user *user_data; | |
744 | int page_offset, page_length; | |
673a394b | 745 | int ret; |
40123c1f EA |
746 | |
747 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
748 | remain = args->size; | |
673a394b EA |
749 | |
750 | mutex_lock(&dev->struct_mutex); | |
751 | ||
40123c1f EA |
752 | ret = i915_gem_object_get_pages(obj); |
753 | if (ret != 0) | |
754 | goto fail_unlock; | |
673a394b | 755 | |
e47c68e9 | 756 | ret = i915_gem_object_set_to_cpu_domain(obj, 1); |
40123c1f EA |
757 | if (ret != 0) |
758 | goto fail_put_pages; | |
759 | ||
760 | obj_priv = obj->driver_private; | |
761 | offset = args->offset; | |
762 | obj_priv->dirty = 1; | |
763 | ||
764 | while (remain > 0) { | |
765 | /* Operation in this page | |
766 | * | |
767 | * page_base = page offset within aperture | |
768 | * page_offset = offset within page | |
769 | * page_length = bytes to copy for this page | |
770 | */ | |
771 | page_base = (offset & ~(PAGE_SIZE-1)); | |
772 | page_offset = offset & (PAGE_SIZE-1); | |
773 | page_length = remain; | |
774 | if ((page_offset + remain) > PAGE_SIZE) | |
775 | page_length = PAGE_SIZE - page_offset; | |
776 | ||
777 | ret = fast_shmem_write(obj_priv->pages, | |
778 | page_base, page_offset, | |
779 | user_data, page_length); | |
780 | if (ret) | |
781 | goto fail_put_pages; | |
782 | ||
783 | remain -= page_length; | |
784 | user_data += page_length; | |
785 | offset += page_length; | |
786 | } | |
787 | ||
788 | fail_put_pages: | |
789 | i915_gem_object_put_pages(obj); | |
790 | fail_unlock: | |
791 | mutex_unlock(&dev->struct_mutex); | |
792 | ||
793 | return ret; | |
794 | } | |
795 | ||
796 | /** | |
797 | * This is the fallback shmem pwrite path, which uses get_user_pages to pin | |
798 | * the memory and maps it using kmap_atomic for copying. | |
799 | * | |
800 | * This avoids taking mmap_sem for faulting on the user's address while the | |
801 | * struct_mutex is held. | |
802 | */ | |
803 | static int | |
804 | i915_gem_shmem_pwrite_slow(struct drm_device *dev, struct drm_gem_object *obj, | |
805 | struct drm_i915_gem_pwrite *args, | |
806 | struct drm_file *file_priv) | |
807 | { | |
808 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
809 | struct mm_struct *mm = current->mm; | |
810 | struct page **user_pages; | |
811 | ssize_t remain; | |
812 | loff_t offset, pinned_pages, i; | |
813 | loff_t first_data_page, last_data_page, num_pages; | |
814 | int shmem_page_index, shmem_page_offset; | |
815 | int data_page_index, data_page_offset; | |
816 | int page_length; | |
817 | int ret; | |
818 | uint64_t data_ptr = args->data_ptr; | |
280b713b | 819 | int do_bit17_swizzling; |
40123c1f EA |
820 | |
821 | remain = args->size; | |
822 | ||
823 | /* Pin the user pages containing the data. We can't fault while | |
824 | * holding the struct mutex, and all of the pwrite implementations | |
825 | * want to hold it while dereferencing the user data. | |
826 | */ | |
827 | first_data_page = data_ptr / PAGE_SIZE; | |
828 | last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; | |
829 | num_pages = last_data_page - first_data_page + 1; | |
830 | ||
8e7d2b2c | 831 | user_pages = drm_calloc_large(num_pages, sizeof(struct page *)); |
40123c1f EA |
832 | if (user_pages == NULL) |
833 | return -ENOMEM; | |
834 | ||
835 | down_read(&mm->mmap_sem); | |
836 | pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, | |
837 | num_pages, 0, 0, user_pages, NULL); | |
838 | up_read(&mm->mmap_sem); | |
839 | if (pinned_pages < num_pages) { | |
840 | ret = -EFAULT; | |
841 | goto fail_put_user_pages; | |
673a394b EA |
842 | } |
843 | ||
280b713b EA |
844 | do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
845 | ||
40123c1f EA |
846 | mutex_lock(&dev->struct_mutex); |
847 | ||
848 | ret = i915_gem_object_get_pages(obj); | |
849 | if (ret != 0) | |
850 | goto fail_unlock; | |
851 | ||
852 | ret = i915_gem_object_set_to_cpu_domain(obj, 1); | |
853 | if (ret != 0) | |
854 | goto fail_put_pages; | |
855 | ||
856 | obj_priv = obj->driver_private; | |
673a394b | 857 | offset = args->offset; |
40123c1f | 858 | obj_priv->dirty = 1; |
673a394b | 859 | |
40123c1f EA |
860 | while (remain > 0) { |
861 | /* Operation in this page | |
862 | * | |
863 | * shmem_page_index = page number within shmem file | |
864 | * shmem_page_offset = offset within page in shmem file | |
865 | * data_page_index = page number in get_user_pages return | |
866 | * data_page_offset = offset with data_page_index page. | |
867 | * page_length = bytes to copy for this page | |
868 | */ | |
869 | shmem_page_index = offset / PAGE_SIZE; | |
870 | shmem_page_offset = offset & ~PAGE_MASK; | |
871 | data_page_index = data_ptr / PAGE_SIZE - first_data_page; | |
872 | data_page_offset = data_ptr & ~PAGE_MASK; | |
873 | ||
874 | page_length = remain; | |
875 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
876 | page_length = PAGE_SIZE - shmem_page_offset; | |
877 | if ((data_page_offset + page_length) > PAGE_SIZE) | |
878 | page_length = PAGE_SIZE - data_page_offset; | |
879 | ||
280b713b EA |
880 | if (do_bit17_swizzling) { |
881 | ret = slow_shmem_bit17_copy(obj_priv->pages[shmem_page_index], | |
882 | shmem_page_offset, | |
883 | user_pages[data_page_index], | |
884 | data_page_offset, | |
885 | page_length, | |
886 | 0); | |
887 | } else { | |
888 | ret = slow_shmem_copy(obj_priv->pages[shmem_page_index], | |
889 | shmem_page_offset, | |
890 | user_pages[data_page_index], | |
891 | data_page_offset, | |
892 | page_length); | |
893 | } | |
40123c1f EA |
894 | if (ret) |
895 | goto fail_put_pages; | |
896 | ||
897 | remain -= page_length; | |
898 | data_ptr += page_length; | |
899 | offset += page_length; | |
673a394b EA |
900 | } |
901 | ||
40123c1f EA |
902 | fail_put_pages: |
903 | i915_gem_object_put_pages(obj); | |
904 | fail_unlock: | |
673a394b | 905 | mutex_unlock(&dev->struct_mutex); |
40123c1f EA |
906 | fail_put_user_pages: |
907 | for (i = 0; i < pinned_pages; i++) | |
908 | page_cache_release(user_pages[i]); | |
8e7d2b2c | 909 | drm_free_large(user_pages); |
673a394b | 910 | |
40123c1f | 911 | return ret; |
673a394b EA |
912 | } |
913 | ||
914 | /** | |
915 | * Writes data to the object referenced by handle. | |
916 | * | |
917 | * On error, the contents of the buffer that were to be modified are undefined. | |
918 | */ | |
919 | int | |
920 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, | |
921 | struct drm_file *file_priv) | |
922 | { | |
923 | struct drm_i915_gem_pwrite *args = data; | |
924 | struct drm_gem_object *obj; | |
925 | struct drm_i915_gem_object *obj_priv; | |
926 | int ret = 0; | |
927 | ||
928 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
929 | if (obj == NULL) | |
930 | return -EBADF; | |
931 | obj_priv = obj->driver_private; | |
932 | ||
933 | /* Bounds check destination. | |
934 | * | |
935 | * XXX: This could use review for overflow issues... | |
936 | */ | |
937 | if (args->offset > obj->size || args->size > obj->size || | |
938 | args->offset + args->size > obj->size) { | |
939 | drm_gem_object_unreference(obj); | |
940 | return -EINVAL; | |
941 | } | |
942 | ||
943 | /* We can only do the GTT pwrite on untiled buffers, as otherwise | |
944 | * it would end up going through the fenced access, and we'll get | |
945 | * different detiling behavior between reading and writing. | |
946 | * pread/pwrite currently are reading and writing from the CPU | |
947 | * perspective, requiring manual detiling by the client. | |
948 | */ | |
71acb5eb DA |
949 | if (obj_priv->phys_obj) |
950 | ret = i915_gem_phys_pwrite(dev, obj, args, file_priv); | |
951 | else if (obj_priv->tiling_mode == I915_TILING_NONE && | |
3de09aa3 EA |
952 | dev->gtt_total != 0) { |
953 | ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file_priv); | |
954 | if (ret == -EFAULT) { | |
955 | ret = i915_gem_gtt_pwrite_slow(dev, obj, args, | |
956 | file_priv); | |
957 | } | |
280b713b EA |
958 | } else if (i915_gem_object_needs_bit17_swizzle(obj)) { |
959 | ret = i915_gem_shmem_pwrite_slow(dev, obj, args, file_priv); | |
40123c1f EA |
960 | } else { |
961 | ret = i915_gem_shmem_pwrite_fast(dev, obj, args, file_priv); | |
962 | if (ret == -EFAULT) { | |
963 | ret = i915_gem_shmem_pwrite_slow(dev, obj, args, | |
964 | file_priv); | |
965 | } | |
966 | } | |
673a394b EA |
967 | |
968 | #if WATCH_PWRITE | |
969 | if (ret) | |
970 | DRM_INFO("pwrite failed %d\n", ret); | |
971 | #endif | |
972 | ||
973 | drm_gem_object_unreference(obj); | |
974 | ||
975 | return ret; | |
976 | } | |
977 | ||
978 | /** | |
2ef7eeaa EA |
979 | * Called when user space prepares to use an object with the CPU, either |
980 | * through the mmap ioctl's mapping or a GTT mapping. | |
673a394b EA |
981 | */ |
982 | int | |
983 | i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, | |
984 | struct drm_file *file_priv) | |
985 | { | |
a09ba7fa | 986 | struct drm_i915_private *dev_priv = dev->dev_private; |
673a394b EA |
987 | struct drm_i915_gem_set_domain *args = data; |
988 | struct drm_gem_object *obj; | |
652c393a | 989 | struct drm_i915_gem_object *obj_priv; |
2ef7eeaa EA |
990 | uint32_t read_domains = args->read_domains; |
991 | uint32_t write_domain = args->write_domain; | |
673a394b EA |
992 | int ret; |
993 | ||
994 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
995 | return -ENODEV; | |
996 | ||
2ef7eeaa | 997 | /* Only handle setting domains to types used by the CPU. */ |
21d509e3 | 998 | if (write_domain & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
999 | return -EINVAL; |
1000 | ||
21d509e3 | 1001 | if (read_domains & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
1002 | return -EINVAL; |
1003 | ||
1004 | /* Having something in the write domain implies it's in the read | |
1005 | * domain, and only that read domain. Enforce that in the request. | |
1006 | */ | |
1007 | if (write_domain != 0 && read_domains != write_domain) | |
1008 | return -EINVAL; | |
1009 | ||
673a394b EA |
1010 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
1011 | if (obj == NULL) | |
1012 | return -EBADF; | |
652c393a | 1013 | obj_priv = obj->driver_private; |
673a394b EA |
1014 | |
1015 | mutex_lock(&dev->struct_mutex); | |
652c393a JB |
1016 | |
1017 | intel_mark_busy(dev, obj); | |
1018 | ||
673a394b | 1019 | #if WATCH_BUF |
cfd43c02 | 1020 | DRM_INFO("set_domain_ioctl %p(%zd), %08x %08x\n", |
2ef7eeaa | 1021 | obj, obj->size, read_domains, write_domain); |
673a394b | 1022 | #endif |
2ef7eeaa EA |
1023 | if (read_domains & I915_GEM_DOMAIN_GTT) { |
1024 | ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0); | |
02354392 | 1025 | |
a09ba7fa EA |
1026 | /* Update the LRU on the fence for the CPU access that's |
1027 | * about to occur. | |
1028 | */ | |
1029 | if (obj_priv->fence_reg != I915_FENCE_REG_NONE) { | |
1030 | list_move_tail(&obj_priv->fence_list, | |
1031 | &dev_priv->mm.fence_list); | |
1032 | } | |
1033 | ||
02354392 EA |
1034 | /* Silently promote "you're not bound, there was nothing to do" |
1035 | * to success, since the client was just asking us to | |
1036 | * make sure everything was done. | |
1037 | */ | |
1038 | if (ret == -EINVAL) | |
1039 | ret = 0; | |
2ef7eeaa | 1040 | } else { |
e47c68e9 | 1041 | ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0); |
2ef7eeaa EA |
1042 | } |
1043 | ||
673a394b EA |
1044 | drm_gem_object_unreference(obj); |
1045 | mutex_unlock(&dev->struct_mutex); | |
1046 | return ret; | |
1047 | } | |
1048 | ||
1049 | /** | |
1050 | * Called when user space has done writes to this buffer | |
1051 | */ | |
1052 | int | |
1053 | i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, | |
1054 | struct drm_file *file_priv) | |
1055 | { | |
1056 | struct drm_i915_gem_sw_finish *args = data; | |
1057 | struct drm_gem_object *obj; | |
1058 | struct drm_i915_gem_object *obj_priv; | |
1059 | int ret = 0; | |
1060 | ||
1061 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
1062 | return -ENODEV; | |
1063 | ||
1064 | mutex_lock(&dev->struct_mutex); | |
1065 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
1066 | if (obj == NULL) { | |
1067 | mutex_unlock(&dev->struct_mutex); | |
1068 | return -EBADF; | |
1069 | } | |
1070 | ||
1071 | #if WATCH_BUF | |
cfd43c02 | 1072 | DRM_INFO("%s: sw_finish %d (%p %zd)\n", |
673a394b EA |
1073 | __func__, args->handle, obj, obj->size); |
1074 | #endif | |
1075 | obj_priv = obj->driver_private; | |
1076 | ||
1077 | /* Pinned buffers may be scanout, so flush the cache */ | |
e47c68e9 EA |
1078 | if (obj_priv->pin_count) |
1079 | i915_gem_object_flush_cpu_write_domain(obj); | |
1080 | ||
673a394b EA |
1081 | drm_gem_object_unreference(obj); |
1082 | mutex_unlock(&dev->struct_mutex); | |
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | /** | |
1087 | * Maps the contents of an object, returning the address it is mapped | |
1088 | * into. | |
1089 | * | |
1090 | * While the mapping holds a reference on the contents of the object, it doesn't | |
1091 | * imply a ref on the object itself. | |
1092 | */ | |
1093 | int | |
1094 | i915_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
1095 | struct drm_file *file_priv) | |
1096 | { | |
1097 | struct drm_i915_gem_mmap *args = data; | |
1098 | struct drm_gem_object *obj; | |
1099 | loff_t offset; | |
1100 | unsigned long addr; | |
1101 | ||
1102 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
1103 | return -ENODEV; | |
1104 | ||
1105 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
1106 | if (obj == NULL) | |
1107 | return -EBADF; | |
1108 | ||
1109 | offset = args->offset; | |
1110 | ||
1111 | down_write(¤t->mm->mmap_sem); | |
1112 | addr = do_mmap(obj->filp, 0, args->size, | |
1113 | PROT_READ | PROT_WRITE, MAP_SHARED, | |
1114 | args->offset); | |
1115 | up_write(¤t->mm->mmap_sem); | |
1116 | mutex_lock(&dev->struct_mutex); | |
1117 | drm_gem_object_unreference(obj); | |
1118 | mutex_unlock(&dev->struct_mutex); | |
1119 | if (IS_ERR((void *)addr)) | |
1120 | return addr; | |
1121 | ||
1122 | args->addr_ptr = (uint64_t) addr; | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
de151cf6 JB |
1127 | /** |
1128 | * i915_gem_fault - fault a page into the GTT | |
1129 | * vma: VMA in question | |
1130 | * vmf: fault info | |
1131 | * | |
1132 | * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped | |
1133 | * from userspace. The fault handler takes care of binding the object to | |
1134 | * the GTT (if needed), allocating and programming a fence register (again, | |
1135 | * only if needed based on whether the old reg is still valid or the object | |
1136 | * is tiled) and inserting a new PTE into the faulting process. | |
1137 | * | |
1138 | * Note that the faulting process may involve evicting existing objects | |
1139 | * from the GTT and/or fence registers to make room. So performance may | |
1140 | * suffer if the GTT working set is large or there are few fence registers | |
1141 | * left. | |
1142 | */ | |
1143 | int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1144 | { | |
1145 | struct drm_gem_object *obj = vma->vm_private_data; | |
1146 | struct drm_device *dev = obj->dev; | |
1147 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1148 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1149 | pgoff_t page_offset; | |
1150 | unsigned long pfn; | |
1151 | int ret = 0; | |
0f973f27 | 1152 | bool write = !!(vmf->flags & FAULT_FLAG_WRITE); |
de151cf6 JB |
1153 | |
1154 | /* We don't use vmf->pgoff since that has the fake offset */ | |
1155 | page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> | |
1156 | PAGE_SHIFT; | |
1157 | ||
1158 | /* Now bind it into the GTT if needed */ | |
1159 | mutex_lock(&dev->struct_mutex); | |
1160 | if (!obj_priv->gtt_space) { | |
e67b8ce1 | 1161 | ret = i915_gem_object_bind_to_gtt(obj, 0); |
de151cf6 JB |
1162 | if (ret) { |
1163 | mutex_unlock(&dev->struct_mutex); | |
1164 | return VM_FAULT_SIGBUS; | |
1165 | } | |
4960aaca | 1166 | list_add_tail(&obj_priv->list, &dev_priv->mm.inactive_list); |
07f4f3e8 KH |
1167 | |
1168 | ret = i915_gem_object_set_to_gtt_domain(obj, write); | |
1169 | if (ret) { | |
1170 | mutex_unlock(&dev->struct_mutex); | |
1171 | return VM_FAULT_SIGBUS; | |
1172 | } | |
de151cf6 JB |
1173 | } |
1174 | ||
1175 | /* Need a new fence register? */ | |
a09ba7fa | 1176 | if (obj_priv->tiling_mode != I915_TILING_NONE) { |
8c4b8c3f | 1177 | ret = i915_gem_object_get_fence_reg(obj); |
7d8d58b2 CW |
1178 | if (ret) { |
1179 | mutex_unlock(&dev->struct_mutex); | |
d9ddcb96 | 1180 | return VM_FAULT_SIGBUS; |
7d8d58b2 | 1181 | } |
d9ddcb96 | 1182 | } |
de151cf6 JB |
1183 | |
1184 | pfn = ((dev->agp->base + obj_priv->gtt_offset) >> PAGE_SHIFT) + | |
1185 | page_offset; | |
1186 | ||
1187 | /* Finally, remap it using the new GTT offset */ | |
1188 | ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn); | |
1189 | ||
1190 | mutex_unlock(&dev->struct_mutex); | |
1191 | ||
1192 | switch (ret) { | |
1193 | case -ENOMEM: | |
1194 | case -EAGAIN: | |
1195 | return VM_FAULT_OOM; | |
1196 | case -EFAULT: | |
959b887c | 1197 | case -EINVAL: |
de151cf6 JB |
1198 | return VM_FAULT_SIGBUS; |
1199 | default: | |
1200 | return VM_FAULT_NOPAGE; | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | /** | |
1205 | * i915_gem_create_mmap_offset - create a fake mmap offset for an object | |
1206 | * @obj: obj in question | |
1207 | * | |
1208 | * GEM memory mapping works by handing back to userspace a fake mmap offset | |
1209 | * it can use in a subsequent mmap(2) call. The DRM core code then looks | |
1210 | * up the object based on the offset and sets up the various memory mapping | |
1211 | * structures. | |
1212 | * | |
1213 | * This routine allocates and attaches a fake offset for @obj. | |
1214 | */ | |
1215 | static int | |
1216 | i915_gem_create_mmap_offset(struct drm_gem_object *obj) | |
1217 | { | |
1218 | struct drm_device *dev = obj->dev; | |
1219 | struct drm_gem_mm *mm = dev->mm_private; | |
1220 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1221 | struct drm_map_list *list; | |
f77d390c | 1222 | struct drm_local_map *map; |
de151cf6 JB |
1223 | int ret = 0; |
1224 | ||
1225 | /* Set the object up for mmap'ing */ | |
1226 | list = &obj->map_list; | |
9a298b2a | 1227 | list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL); |
de151cf6 JB |
1228 | if (!list->map) |
1229 | return -ENOMEM; | |
1230 | ||
1231 | map = list->map; | |
1232 | map->type = _DRM_GEM; | |
1233 | map->size = obj->size; | |
1234 | map->handle = obj; | |
1235 | ||
1236 | /* Get a DRM GEM mmap offset allocated... */ | |
1237 | list->file_offset_node = drm_mm_search_free(&mm->offset_manager, | |
1238 | obj->size / PAGE_SIZE, 0, 0); | |
1239 | if (!list->file_offset_node) { | |
1240 | DRM_ERROR("failed to allocate offset for bo %d\n", obj->name); | |
1241 | ret = -ENOMEM; | |
1242 | goto out_free_list; | |
1243 | } | |
1244 | ||
1245 | list->file_offset_node = drm_mm_get_block(list->file_offset_node, | |
1246 | obj->size / PAGE_SIZE, 0); | |
1247 | if (!list->file_offset_node) { | |
1248 | ret = -ENOMEM; | |
1249 | goto out_free_list; | |
1250 | } | |
1251 | ||
1252 | list->hash.key = list->file_offset_node->start; | |
1253 | if (drm_ht_insert_item(&mm->offset_hash, &list->hash)) { | |
1254 | DRM_ERROR("failed to add to map hash\n"); | |
1255 | goto out_free_mm; | |
1256 | } | |
1257 | ||
1258 | /* By now we should be all set, any drm_mmap request on the offset | |
1259 | * below will get to our mmap & fault handler */ | |
1260 | obj_priv->mmap_offset = ((uint64_t) list->hash.key) << PAGE_SHIFT; | |
1261 | ||
1262 | return 0; | |
1263 | ||
1264 | out_free_mm: | |
1265 | drm_mm_put_block(list->file_offset_node); | |
1266 | out_free_list: | |
9a298b2a | 1267 | kfree(list->map); |
de151cf6 JB |
1268 | |
1269 | return ret; | |
1270 | } | |
1271 | ||
901782b2 CW |
1272 | /** |
1273 | * i915_gem_release_mmap - remove physical page mappings | |
1274 | * @obj: obj in question | |
1275 | * | |
1276 | * Preserve the reservation of the mmaping with the DRM core code, but | |
1277 | * relinquish ownership of the pages back to the system. | |
1278 | * | |
1279 | * It is vital that we remove the page mapping if we have mapped a tiled | |
1280 | * object through the GTT and then lose the fence register due to | |
1281 | * resource pressure. Similarly if the object has been moved out of the | |
1282 | * aperture, than pages mapped into userspace must be revoked. Removing the | |
1283 | * mapping will then trigger a page fault on the next user access, allowing | |
1284 | * fixup by i915_gem_fault(). | |
1285 | */ | |
d05ca301 | 1286 | void |
901782b2 CW |
1287 | i915_gem_release_mmap(struct drm_gem_object *obj) |
1288 | { | |
1289 | struct drm_device *dev = obj->dev; | |
1290 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1291 | ||
1292 | if (dev->dev_mapping) | |
1293 | unmap_mapping_range(dev->dev_mapping, | |
1294 | obj_priv->mmap_offset, obj->size, 1); | |
1295 | } | |
1296 | ||
ab00b3e5 JB |
1297 | static void |
1298 | i915_gem_free_mmap_offset(struct drm_gem_object *obj) | |
1299 | { | |
1300 | struct drm_device *dev = obj->dev; | |
1301 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1302 | struct drm_gem_mm *mm = dev->mm_private; | |
1303 | struct drm_map_list *list; | |
1304 | ||
1305 | list = &obj->map_list; | |
1306 | drm_ht_remove_item(&mm->offset_hash, &list->hash); | |
1307 | ||
1308 | if (list->file_offset_node) { | |
1309 | drm_mm_put_block(list->file_offset_node); | |
1310 | list->file_offset_node = NULL; | |
1311 | } | |
1312 | ||
1313 | if (list->map) { | |
9a298b2a | 1314 | kfree(list->map); |
ab00b3e5 JB |
1315 | list->map = NULL; |
1316 | } | |
1317 | ||
1318 | obj_priv->mmap_offset = 0; | |
1319 | } | |
1320 | ||
de151cf6 JB |
1321 | /** |
1322 | * i915_gem_get_gtt_alignment - return required GTT alignment for an object | |
1323 | * @obj: object to check | |
1324 | * | |
1325 | * Return the required GTT alignment for an object, taking into account | |
1326 | * potential fence register mapping if needed. | |
1327 | */ | |
1328 | static uint32_t | |
1329 | i915_gem_get_gtt_alignment(struct drm_gem_object *obj) | |
1330 | { | |
1331 | struct drm_device *dev = obj->dev; | |
1332 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1333 | int start, i; | |
1334 | ||
1335 | /* | |
1336 | * Minimum alignment is 4k (GTT page size), but might be greater | |
1337 | * if a fence register is needed for the object. | |
1338 | */ | |
1339 | if (IS_I965G(dev) || obj_priv->tiling_mode == I915_TILING_NONE) | |
1340 | return 4096; | |
1341 | ||
1342 | /* | |
1343 | * Previous chips need to be aligned to the size of the smallest | |
1344 | * fence register that can contain the object. | |
1345 | */ | |
1346 | if (IS_I9XX(dev)) | |
1347 | start = 1024*1024; | |
1348 | else | |
1349 | start = 512*1024; | |
1350 | ||
1351 | for (i = start; i < obj->size; i <<= 1) | |
1352 | ; | |
1353 | ||
1354 | return i; | |
1355 | } | |
1356 | ||
1357 | /** | |
1358 | * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing | |
1359 | * @dev: DRM device | |
1360 | * @data: GTT mapping ioctl data | |
1361 | * @file_priv: GEM object info | |
1362 | * | |
1363 | * Simply returns the fake offset to userspace so it can mmap it. | |
1364 | * The mmap call will end up in drm_gem_mmap(), which will set things | |
1365 | * up so we can get faults in the handler above. | |
1366 | * | |
1367 | * The fault handler will take care of binding the object into the GTT | |
1368 | * (since it may have been evicted to make room for something), allocating | |
1369 | * a fence register, and mapping the appropriate aperture address into | |
1370 | * userspace. | |
1371 | */ | |
1372 | int | |
1373 | i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, | |
1374 | struct drm_file *file_priv) | |
1375 | { | |
1376 | struct drm_i915_gem_mmap_gtt *args = data; | |
1377 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1378 | struct drm_gem_object *obj; | |
1379 | struct drm_i915_gem_object *obj_priv; | |
1380 | int ret; | |
1381 | ||
1382 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
1383 | return -ENODEV; | |
1384 | ||
1385 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
1386 | if (obj == NULL) | |
1387 | return -EBADF; | |
1388 | ||
1389 | mutex_lock(&dev->struct_mutex); | |
1390 | ||
1391 | obj_priv = obj->driver_private; | |
1392 | ||
1393 | if (!obj_priv->mmap_offset) { | |
1394 | ret = i915_gem_create_mmap_offset(obj); | |
13af1062 CW |
1395 | if (ret) { |
1396 | drm_gem_object_unreference(obj); | |
1397 | mutex_unlock(&dev->struct_mutex); | |
de151cf6 | 1398 | return ret; |
13af1062 | 1399 | } |
de151cf6 JB |
1400 | } |
1401 | ||
1402 | args->offset = obj_priv->mmap_offset; | |
1403 | ||
de151cf6 JB |
1404 | /* |
1405 | * Pull it into the GTT so that we have a page list (makes the | |
1406 | * initial fault faster and any subsequent flushing possible). | |
1407 | */ | |
1408 | if (!obj_priv->agp_mem) { | |
e67b8ce1 | 1409 | ret = i915_gem_object_bind_to_gtt(obj, 0); |
de151cf6 JB |
1410 | if (ret) { |
1411 | drm_gem_object_unreference(obj); | |
1412 | mutex_unlock(&dev->struct_mutex); | |
1413 | return ret; | |
1414 | } | |
14b60391 | 1415 | list_add_tail(&obj_priv->list, &dev_priv->mm.inactive_list); |
de151cf6 JB |
1416 | } |
1417 | ||
1418 | drm_gem_object_unreference(obj); | |
1419 | mutex_unlock(&dev->struct_mutex); | |
1420 | ||
1421 | return 0; | |
1422 | } | |
1423 | ||
6911a9b8 | 1424 | void |
856fa198 | 1425 | i915_gem_object_put_pages(struct drm_gem_object *obj) |
673a394b EA |
1426 | { |
1427 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1428 | int page_count = obj->size / PAGE_SIZE; | |
1429 | int i; | |
1430 | ||
856fa198 | 1431 | BUG_ON(obj_priv->pages_refcount == 0); |
673a394b | 1432 | |
856fa198 EA |
1433 | if (--obj_priv->pages_refcount != 0) |
1434 | return; | |
673a394b | 1435 | |
280b713b EA |
1436 | if (obj_priv->tiling_mode != I915_TILING_NONE) |
1437 | i915_gem_object_save_bit_17_swizzle(obj); | |
1438 | ||
673a394b | 1439 | for (i = 0; i < page_count; i++) |
856fa198 | 1440 | if (obj_priv->pages[i] != NULL) { |
673a394b | 1441 | if (obj_priv->dirty) |
856fa198 EA |
1442 | set_page_dirty(obj_priv->pages[i]); |
1443 | mark_page_accessed(obj_priv->pages[i]); | |
1444 | page_cache_release(obj_priv->pages[i]); | |
673a394b EA |
1445 | } |
1446 | obj_priv->dirty = 0; | |
1447 | ||
8e7d2b2c | 1448 | drm_free_large(obj_priv->pages); |
856fa198 | 1449 | obj_priv->pages = NULL; |
673a394b EA |
1450 | } |
1451 | ||
1452 | static void | |
ce44b0ea | 1453 | i915_gem_object_move_to_active(struct drm_gem_object *obj, uint32_t seqno) |
673a394b EA |
1454 | { |
1455 | struct drm_device *dev = obj->dev; | |
1456 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1457 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1458 | ||
1459 | /* Add a reference if we're newly entering the active list. */ | |
1460 | if (!obj_priv->active) { | |
1461 | drm_gem_object_reference(obj); | |
1462 | obj_priv->active = 1; | |
1463 | } | |
1464 | /* Move from whatever list we were on to the tail of execution. */ | |
5e118f41 | 1465 | spin_lock(&dev_priv->mm.active_list_lock); |
673a394b EA |
1466 | list_move_tail(&obj_priv->list, |
1467 | &dev_priv->mm.active_list); | |
5e118f41 | 1468 | spin_unlock(&dev_priv->mm.active_list_lock); |
ce44b0ea | 1469 | obj_priv->last_rendering_seqno = seqno; |
673a394b EA |
1470 | } |
1471 | ||
ce44b0ea EA |
1472 | static void |
1473 | i915_gem_object_move_to_flushing(struct drm_gem_object *obj) | |
1474 | { | |
1475 | struct drm_device *dev = obj->dev; | |
1476 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1477 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1478 | ||
1479 | BUG_ON(!obj_priv->active); | |
1480 | list_move_tail(&obj_priv->list, &dev_priv->mm.flushing_list); | |
1481 | obj_priv->last_rendering_seqno = 0; | |
1482 | } | |
673a394b EA |
1483 | |
1484 | static void | |
1485 | i915_gem_object_move_to_inactive(struct drm_gem_object *obj) | |
1486 | { | |
1487 | struct drm_device *dev = obj->dev; | |
1488 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1489 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1490 | ||
1491 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1492 | if (obj_priv->pin_count != 0) | |
1493 | list_del_init(&obj_priv->list); | |
1494 | else | |
1495 | list_move_tail(&obj_priv->list, &dev_priv->mm.inactive_list); | |
1496 | ||
ce44b0ea | 1497 | obj_priv->last_rendering_seqno = 0; |
673a394b EA |
1498 | if (obj_priv->active) { |
1499 | obj_priv->active = 0; | |
1500 | drm_gem_object_unreference(obj); | |
1501 | } | |
1502 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1503 | } | |
1504 | ||
1505 | /** | |
1506 | * Creates a new sequence number, emitting a write of it to the status page | |
1507 | * plus an interrupt, which will trigger i915_user_interrupt_handler. | |
1508 | * | |
1509 | * Must be called with struct_lock held. | |
1510 | * | |
1511 | * Returned sequence numbers are nonzero on success. | |
1512 | */ | |
1513 | static uint32_t | |
b962442e EA |
1514 | i915_add_request(struct drm_device *dev, struct drm_file *file_priv, |
1515 | uint32_t flush_domains) | |
673a394b EA |
1516 | { |
1517 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b962442e | 1518 | struct drm_i915_file_private *i915_file_priv = NULL; |
673a394b EA |
1519 | struct drm_i915_gem_request *request; |
1520 | uint32_t seqno; | |
1521 | int was_empty; | |
1522 | RING_LOCALS; | |
1523 | ||
b962442e EA |
1524 | if (file_priv != NULL) |
1525 | i915_file_priv = file_priv->driver_priv; | |
1526 | ||
9a298b2a | 1527 | request = kzalloc(sizeof(*request), GFP_KERNEL); |
673a394b EA |
1528 | if (request == NULL) |
1529 | return 0; | |
1530 | ||
1531 | /* Grab the seqno we're going to make this request be, and bump the | |
1532 | * next (skipping 0 so it can be the reserved no-seqno value). | |
1533 | */ | |
1534 | seqno = dev_priv->mm.next_gem_seqno; | |
1535 | dev_priv->mm.next_gem_seqno++; | |
1536 | if (dev_priv->mm.next_gem_seqno == 0) | |
1537 | dev_priv->mm.next_gem_seqno++; | |
1538 | ||
1539 | BEGIN_LP_RING(4); | |
1540 | OUT_RING(MI_STORE_DWORD_INDEX); | |
1541 | OUT_RING(I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); | |
1542 | OUT_RING(seqno); | |
1543 | ||
1544 | OUT_RING(MI_USER_INTERRUPT); | |
1545 | ADVANCE_LP_RING(); | |
1546 | ||
1547 | DRM_DEBUG("%d\n", seqno); | |
1548 | ||
1549 | request->seqno = seqno; | |
1550 | request->emitted_jiffies = jiffies; | |
673a394b EA |
1551 | was_empty = list_empty(&dev_priv->mm.request_list); |
1552 | list_add_tail(&request->list, &dev_priv->mm.request_list); | |
b962442e EA |
1553 | if (i915_file_priv) { |
1554 | list_add_tail(&request->client_list, | |
1555 | &i915_file_priv->mm.request_list); | |
1556 | } else { | |
1557 | INIT_LIST_HEAD(&request->client_list); | |
1558 | } | |
673a394b | 1559 | |
ce44b0ea EA |
1560 | /* Associate any objects on the flushing list matching the write |
1561 | * domain we're flushing with our flush. | |
1562 | */ | |
1563 | if (flush_domains != 0) { | |
1564 | struct drm_i915_gem_object *obj_priv, *next; | |
1565 | ||
1566 | list_for_each_entry_safe(obj_priv, next, | |
1567 | &dev_priv->mm.flushing_list, list) { | |
1568 | struct drm_gem_object *obj = obj_priv->obj; | |
1569 | ||
1570 | if ((obj->write_domain & flush_domains) == | |
1571 | obj->write_domain) { | |
1572 | obj->write_domain = 0; | |
1573 | i915_gem_object_move_to_active(obj, seqno); | |
1574 | } | |
1575 | } | |
1576 | ||
1577 | } | |
1578 | ||
f65d9421 BG |
1579 | if (!dev_priv->mm.suspended) { |
1580 | mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); | |
1581 | if (was_empty) | |
1582 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); | |
1583 | } | |
673a394b EA |
1584 | return seqno; |
1585 | } | |
1586 | ||
1587 | /** | |
1588 | * Command execution barrier | |
1589 | * | |
1590 | * Ensures that all commands in the ring are finished | |
1591 | * before signalling the CPU | |
1592 | */ | |
3043c60c | 1593 | static uint32_t |
673a394b EA |
1594 | i915_retire_commands(struct drm_device *dev) |
1595 | { | |
1596 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1597 | uint32_t cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; | |
1598 | uint32_t flush_domains = 0; | |
1599 | RING_LOCALS; | |
1600 | ||
1601 | /* The sampler always gets flushed on i965 (sigh) */ | |
1602 | if (IS_I965G(dev)) | |
1603 | flush_domains |= I915_GEM_DOMAIN_SAMPLER; | |
1604 | BEGIN_LP_RING(2); | |
1605 | OUT_RING(cmd); | |
1606 | OUT_RING(0); /* noop */ | |
1607 | ADVANCE_LP_RING(); | |
1608 | return flush_domains; | |
1609 | } | |
1610 | ||
1611 | /** | |
1612 | * Moves buffers associated only with the given active seqno from the active | |
1613 | * to inactive list, potentially freeing them. | |
1614 | */ | |
1615 | static void | |
1616 | i915_gem_retire_request(struct drm_device *dev, | |
1617 | struct drm_i915_gem_request *request) | |
1618 | { | |
1619 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1620 | ||
1621 | /* Move any buffers on the active list that are no longer referenced | |
1622 | * by the ringbuffer to the flushing/inactive lists as appropriate. | |
1623 | */ | |
5e118f41 | 1624 | spin_lock(&dev_priv->mm.active_list_lock); |
673a394b EA |
1625 | while (!list_empty(&dev_priv->mm.active_list)) { |
1626 | struct drm_gem_object *obj; | |
1627 | struct drm_i915_gem_object *obj_priv; | |
1628 | ||
1629 | obj_priv = list_first_entry(&dev_priv->mm.active_list, | |
1630 | struct drm_i915_gem_object, | |
1631 | list); | |
1632 | obj = obj_priv->obj; | |
1633 | ||
1634 | /* If the seqno being retired doesn't match the oldest in the | |
1635 | * list, then the oldest in the list must still be newer than | |
1636 | * this seqno. | |
1637 | */ | |
1638 | if (obj_priv->last_rendering_seqno != request->seqno) | |
5e118f41 | 1639 | goto out; |
de151cf6 | 1640 | |
673a394b EA |
1641 | #if WATCH_LRU |
1642 | DRM_INFO("%s: retire %d moves to inactive list %p\n", | |
1643 | __func__, request->seqno, obj); | |
1644 | #endif | |
1645 | ||
ce44b0ea EA |
1646 | if (obj->write_domain != 0) |
1647 | i915_gem_object_move_to_flushing(obj); | |
68c84342 SL |
1648 | else { |
1649 | /* Take a reference on the object so it won't be | |
1650 | * freed while the spinlock is held. The list | |
1651 | * protection for this spinlock is safe when breaking | |
1652 | * the lock like this since the next thing we do | |
1653 | * is just get the head of the list again. | |
1654 | */ | |
1655 | drm_gem_object_reference(obj); | |
673a394b | 1656 | i915_gem_object_move_to_inactive(obj); |
68c84342 SL |
1657 | spin_unlock(&dev_priv->mm.active_list_lock); |
1658 | drm_gem_object_unreference(obj); | |
1659 | spin_lock(&dev_priv->mm.active_list_lock); | |
1660 | } | |
673a394b | 1661 | } |
5e118f41 CW |
1662 | out: |
1663 | spin_unlock(&dev_priv->mm.active_list_lock); | |
673a394b EA |
1664 | } |
1665 | ||
1666 | /** | |
1667 | * Returns true if seq1 is later than seq2. | |
1668 | */ | |
22be1724 | 1669 | bool |
673a394b EA |
1670 | i915_seqno_passed(uint32_t seq1, uint32_t seq2) |
1671 | { | |
1672 | return (int32_t)(seq1 - seq2) >= 0; | |
1673 | } | |
1674 | ||
1675 | uint32_t | |
1676 | i915_get_gem_seqno(struct drm_device *dev) | |
1677 | { | |
1678 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1679 | ||
1680 | return READ_HWSP(dev_priv, I915_GEM_HWS_INDEX); | |
1681 | } | |
1682 | ||
1683 | /** | |
1684 | * This function clears the request list as sequence numbers are passed. | |
1685 | */ | |
1686 | void | |
1687 | i915_gem_retire_requests(struct drm_device *dev) | |
1688 | { | |
1689 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1690 | uint32_t seqno; | |
1691 | ||
6c0594a3 KW |
1692 | if (!dev_priv->hw_status_page) |
1693 | return; | |
1694 | ||
673a394b EA |
1695 | seqno = i915_get_gem_seqno(dev); |
1696 | ||
1697 | while (!list_empty(&dev_priv->mm.request_list)) { | |
1698 | struct drm_i915_gem_request *request; | |
1699 | uint32_t retiring_seqno; | |
1700 | ||
1701 | request = list_first_entry(&dev_priv->mm.request_list, | |
1702 | struct drm_i915_gem_request, | |
1703 | list); | |
1704 | retiring_seqno = request->seqno; | |
1705 | ||
1706 | if (i915_seqno_passed(seqno, retiring_seqno) || | |
ba1234d1 | 1707 | atomic_read(&dev_priv->mm.wedged)) { |
673a394b EA |
1708 | i915_gem_retire_request(dev, request); |
1709 | ||
1710 | list_del(&request->list); | |
b962442e | 1711 | list_del(&request->client_list); |
9a298b2a | 1712 | kfree(request); |
673a394b EA |
1713 | } else |
1714 | break; | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | void | |
1719 | i915_gem_retire_work_handler(struct work_struct *work) | |
1720 | { | |
1721 | drm_i915_private_t *dev_priv; | |
1722 | struct drm_device *dev; | |
1723 | ||
1724 | dev_priv = container_of(work, drm_i915_private_t, | |
1725 | mm.retire_work.work); | |
1726 | dev = dev_priv->dev; | |
1727 | ||
1728 | mutex_lock(&dev->struct_mutex); | |
1729 | i915_gem_retire_requests(dev); | |
6dbe2772 KP |
1730 | if (!dev_priv->mm.suspended && |
1731 | !list_empty(&dev_priv->mm.request_list)) | |
9c9fe1f8 | 1732 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); |
673a394b EA |
1733 | mutex_unlock(&dev->struct_mutex); |
1734 | } | |
1735 | ||
1736 | /** | |
1737 | * Waits for a sequence number to be signaled, and cleans up the | |
1738 | * request and object lists appropriately for that event. | |
1739 | */ | |
3043c60c | 1740 | static int |
673a394b EA |
1741 | i915_wait_request(struct drm_device *dev, uint32_t seqno) |
1742 | { | |
1743 | drm_i915_private_t *dev_priv = dev->dev_private; | |
802c7eb6 | 1744 | u32 ier; |
673a394b EA |
1745 | int ret = 0; |
1746 | ||
1747 | BUG_ON(seqno == 0); | |
1748 | ||
ba1234d1 | 1749 | if (atomic_read(&dev_priv->mm.wedged)) |
ffed1d09 BG |
1750 | return -EIO; |
1751 | ||
673a394b | 1752 | if (!i915_seqno_passed(i915_get_gem_seqno(dev), seqno)) { |
036a4a7d ZW |
1753 | if (IS_IGDNG(dev)) |
1754 | ier = I915_READ(DEIER) | I915_READ(GTIER); | |
1755 | else | |
1756 | ier = I915_READ(IER); | |
802c7eb6 JB |
1757 | if (!ier) { |
1758 | DRM_ERROR("something (likely vbetool) disabled " | |
1759 | "interrupts, re-enabling\n"); | |
1760 | i915_driver_irq_preinstall(dev); | |
1761 | i915_driver_irq_postinstall(dev); | |
1762 | } | |
1763 | ||
673a394b EA |
1764 | dev_priv->mm.waiting_gem_seqno = seqno; |
1765 | i915_user_irq_get(dev); | |
1766 | ret = wait_event_interruptible(dev_priv->irq_queue, | |
1767 | i915_seqno_passed(i915_get_gem_seqno(dev), | |
1768 | seqno) || | |
ba1234d1 | 1769 | atomic_read(&dev_priv->mm.wedged)); |
673a394b EA |
1770 | i915_user_irq_put(dev); |
1771 | dev_priv->mm.waiting_gem_seqno = 0; | |
1772 | } | |
ba1234d1 | 1773 | if (atomic_read(&dev_priv->mm.wedged)) |
673a394b EA |
1774 | ret = -EIO; |
1775 | ||
1776 | if (ret && ret != -ERESTARTSYS) | |
1777 | DRM_ERROR("%s returns %d (awaiting %d at %d)\n", | |
1778 | __func__, ret, seqno, i915_get_gem_seqno(dev)); | |
1779 | ||
1780 | /* Directly dispatch request retiring. While we have the work queue | |
1781 | * to handle this, the waiter on a request often wants an associated | |
1782 | * buffer to have made it to the inactive list, and we would need | |
1783 | * a separate wait queue to handle that. | |
1784 | */ | |
1785 | if (ret == 0) | |
1786 | i915_gem_retire_requests(dev); | |
1787 | ||
1788 | return ret; | |
1789 | } | |
1790 | ||
1791 | static void | |
1792 | i915_gem_flush(struct drm_device *dev, | |
1793 | uint32_t invalidate_domains, | |
1794 | uint32_t flush_domains) | |
1795 | { | |
1796 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1797 | uint32_t cmd; | |
1798 | RING_LOCALS; | |
1799 | ||
1800 | #if WATCH_EXEC | |
1801 | DRM_INFO("%s: invalidate %08x flush %08x\n", __func__, | |
1802 | invalidate_domains, flush_domains); | |
1803 | #endif | |
1804 | ||
1805 | if (flush_domains & I915_GEM_DOMAIN_CPU) | |
1806 | drm_agp_chipset_flush(dev); | |
1807 | ||
21d509e3 | 1808 | if ((invalidate_domains | flush_domains) & I915_GEM_GPU_DOMAINS) { |
673a394b EA |
1809 | /* |
1810 | * read/write caches: | |
1811 | * | |
1812 | * I915_GEM_DOMAIN_RENDER is always invalidated, but is | |
1813 | * only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is | |
1814 | * also flushed at 2d versus 3d pipeline switches. | |
1815 | * | |
1816 | * read-only caches: | |
1817 | * | |
1818 | * I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if | |
1819 | * MI_READ_FLUSH is set, and is always flushed on 965. | |
1820 | * | |
1821 | * I915_GEM_DOMAIN_COMMAND may not exist? | |
1822 | * | |
1823 | * I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is | |
1824 | * invalidated when MI_EXE_FLUSH is set. | |
1825 | * | |
1826 | * I915_GEM_DOMAIN_VERTEX, which exists on 965, is | |
1827 | * invalidated with every MI_FLUSH. | |
1828 | * | |
1829 | * TLBs: | |
1830 | * | |
1831 | * On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND | |
1832 | * and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and | |
1833 | * I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER | |
1834 | * are flushed at any MI_FLUSH. | |
1835 | */ | |
1836 | ||
1837 | cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; | |
1838 | if ((invalidate_domains|flush_domains) & | |
1839 | I915_GEM_DOMAIN_RENDER) | |
1840 | cmd &= ~MI_NO_WRITE_FLUSH; | |
1841 | if (!IS_I965G(dev)) { | |
1842 | /* | |
1843 | * On the 965, the sampler cache always gets flushed | |
1844 | * and this bit is reserved. | |
1845 | */ | |
1846 | if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER) | |
1847 | cmd |= MI_READ_FLUSH; | |
1848 | } | |
1849 | if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION) | |
1850 | cmd |= MI_EXE_FLUSH; | |
1851 | ||
1852 | #if WATCH_EXEC | |
1853 | DRM_INFO("%s: queue flush %08x to ring\n", __func__, cmd); | |
1854 | #endif | |
1855 | BEGIN_LP_RING(2); | |
1856 | OUT_RING(cmd); | |
1857 | OUT_RING(0); /* noop */ | |
1858 | ADVANCE_LP_RING(); | |
1859 | } | |
1860 | } | |
1861 | ||
1862 | /** | |
1863 | * Ensures that all rendering to the object has completed and the object is | |
1864 | * safe to unbind from the GTT or access from the CPU. | |
1865 | */ | |
1866 | static int | |
1867 | i915_gem_object_wait_rendering(struct drm_gem_object *obj) | |
1868 | { | |
1869 | struct drm_device *dev = obj->dev; | |
1870 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1871 | int ret; | |
1872 | ||
e47c68e9 EA |
1873 | /* This function only exists to support waiting for existing rendering, |
1874 | * not for emitting required flushes. | |
673a394b | 1875 | */ |
e47c68e9 | 1876 | BUG_ON((obj->write_domain & I915_GEM_GPU_DOMAINS) != 0); |
673a394b EA |
1877 | |
1878 | /* If there is rendering queued on the buffer being evicted, wait for | |
1879 | * it. | |
1880 | */ | |
1881 | if (obj_priv->active) { | |
1882 | #if WATCH_BUF | |
1883 | DRM_INFO("%s: object %p wait for seqno %08x\n", | |
1884 | __func__, obj, obj_priv->last_rendering_seqno); | |
1885 | #endif | |
1886 | ret = i915_wait_request(dev, obj_priv->last_rendering_seqno); | |
1887 | if (ret != 0) | |
1888 | return ret; | |
1889 | } | |
1890 | ||
1891 | return 0; | |
1892 | } | |
1893 | ||
1894 | /** | |
1895 | * Unbinds an object from the GTT aperture. | |
1896 | */ | |
0f973f27 | 1897 | int |
673a394b EA |
1898 | i915_gem_object_unbind(struct drm_gem_object *obj) |
1899 | { | |
1900 | struct drm_device *dev = obj->dev; | |
1901 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1902 | int ret = 0; | |
1903 | ||
1904 | #if WATCH_BUF | |
1905 | DRM_INFO("%s:%d %p\n", __func__, __LINE__, obj); | |
1906 | DRM_INFO("gtt_space %p\n", obj_priv->gtt_space); | |
1907 | #endif | |
1908 | if (obj_priv->gtt_space == NULL) | |
1909 | return 0; | |
1910 | ||
1911 | if (obj_priv->pin_count != 0) { | |
1912 | DRM_ERROR("Attempting to unbind pinned buffer\n"); | |
1913 | return -EINVAL; | |
1914 | } | |
1915 | ||
5323fd04 EA |
1916 | /* blow away mappings if mapped through GTT */ |
1917 | i915_gem_release_mmap(obj); | |
1918 | ||
1919 | if (obj_priv->fence_reg != I915_FENCE_REG_NONE) | |
1920 | i915_gem_clear_fence_reg(obj); | |
1921 | ||
673a394b EA |
1922 | /* Move the object to the CPU domain to ensure that |
1923 | * any possible CPU writes while it's not in the GTT | |
1924 | * are flushed when we go to remap it. This will | |
1925 | * also ensure that all pending GPU writes are finished | |
1926 | * before we unbind. | |
1927 | */ | |
e47c68e9 | 1928 | ret = i915_gem_object_set_to_cpu_domain(obj, 1); |
673a394b | 1929 | if (ret) { |
e47c68e9 EA |
1930 | if (ret != -ERESTARTSYS) |
1931 | DRM_ERROR("set_domain failed: %d\n", ret); | |
673a394b EA |
1932 | return ret; |
1933 | } | |
1934 | ||
5323fd04 EA |
1935 | BUG_ON(obj_priv->active); |
1936 | ||
673a394b EA |
1937 | if (obj_priv->agp_mem != NULL) { |
1938 | drm_unbind_agp(obj_priv->agp_mem); | |
1939 | drm_free_agp(obj_priv->agp_mem, obj->size / PAGE_SIZE); | |
1940 | obj_priv->agp_mem = NULL; | |
1941 | } | |
1942 | ||
856fa198 | 1943 | i915_gem_object_put_pages(obj); |
673a394b EA |
1944 | |
1945 | if (obj_priv->gtt_space) { | |
1946 | atomic_dec(&dev->gtt_count); | |
1947 | atomic_sub(obj->size, &dev->gtt_memory); | |
1948 | ||
1949 | drm_mm_put_block(obj_priv->gtt_space); | |
1950 | obj_priv->gtt_space = NULL; | |
1951 | } | |
1952 | ||
1953 | /* Remove ourselves from the LRU list if present. */ | |
1954 | if (!list_empty(&obj_priv->list)) | |
1955 | list_del_init(&obj_priv->list); | |
1956 | ||
1957 | return 0; | |
1958 | } | |
1959 | ||
1960 | static int | |
1961 | i915_gem_evict_something(struct drm_device *dev) | |
1962 | { | |
1963 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1964 | struct drm_gem_object *obj; | |
1965 | struct drm_i915_gem_object *obj_priv; | |
1966 | int ret = 0; | |
1967 | ||
1968 | for (;;) { | |
1969 | /* If there's an inactive buffer available now, grab it | |
1970 | * and be done. | |
1971 | */ | |
1972 | if (!list_empty(&dev_priv->mm.inactive_list)) { | |
1973 | obj_priv = list_first_entry(&dev_priv->mm.inactive_list, | |
1974 | struct drm_i915_gem_object, | |
1975 | list); | |
1976 | obj = obj_priv->obj; | |
1977 | BUG_ON(obj_priv->pin_count != 0); | |
1978 | #if WATCH_LRU | |
1979 | DRM_INFO("%s: evicting %p\n", __func__, obj); | |
1980 | #endif | |
1981 | BUG_ON(obj_priv->active); | |
1982 | ||
1983 | /* Wait on the rendering and unbind the buffer. */ | |
1984 | ret = i915_gem_object_unbind(obj); | |
1985 | break; | |
1986 | } | |
1987 | ||
1988 | /* If we didn't get anything, but the ring is still processing | |
1989 | * things, wait for one of those things to finish and hopefully | |
1990 | * leave us a buffer to evict. | |
1991 | */ | |
1992 | if (!list_empty(&dev_priv->mm.request_list)) { | |
1993 | struct drm_i915_gem_request *request; | |
1994 | ||
1995 | request = list_first_entry(&dev_priv->mm.request_list, | |
1996 | struct drm_i915_gem_request, | |
1997 | list); | |
1998 | ||
1999 | ret = i915_wait_request(dev, request->seqno); | |
2000 | if (ret) | |
2001 | break; | |
2002 | ||
2003 | /* if waiting caused an object to become inactive, | |
2004 | * then loop around and wait for it. Otherwise, we | |
2005 | * assume that waiting freed and unbound something, | |
2006 | * so there should now be some space in the GTT | |
2007 | */ | |
2008 | if (!list_empty(&dev_priv->mm.inactive_list)) | |
2009 | continue; | |
2010 | break; | |
2011 | } | |
2012 | ||
2013 | /* If we didn't have anything on the request list but there | |
2014 | * are buffers awaiting a flush, emit one and try again. | |
2015 | * When we wait on it, those buffers waiting for that flush | |
2016 | * will get moved to inactive. | |
2017 | */ | |
2018 | if (!list_empty(&dev_priv->mm.flushing_list)) { | |
2019 | obj_priv = list_first_entry(&dev_priv->mm.flushing_list, | |
2020 | struct drm_i915_gem_object, | |
2021 | list); | |
2022 | obj = obj_priv->obj; | |
2023 | ||
2024 | i915_gem_flush(dev, | |
2025 | obj->write_domain, | |
2026 | obj->write_domain); | |
b962442e | 2027 | i915_add_request(dev, NULL, obj->write_domain); |
673a394b EA |
2028 | |
2029 | obj = NULL; | |
2030 | continue; | |
2031 | } | |
2032 | ||
2033 | DRM_ERROR("inactive empty %d request empty %d " | |
2034 | "flushing empty %d\n", | |
2035 | list_empty(&dev_priv->mm.inactive_list), | |
2036 | list_empty(&dev_priv->mm.request_list), | |
2037 | list_empty(&dev_priv->mm.flushing_list)); | |
2038 | /* If we didn't do any of the above, there's nothing to be done | |
2039 | * and we just can't fit it in. | |
2040 | */ | |
2939e1f5 | 2041 | return -ENOSPC; |
673a394b EA |
2042 | } |
2043 | return ret; | |
2044 | } | |
2045 | ||
ac94a962 KP |
2046 | static int |
2047 | i915_gem_evict_everything(struct drm_device *dev) | |
2048 | { | |
2049 | int ret; | |
2050 | ||
2051 | for (;;) { | |
2052 | ret = i915_gem_evict_something(dev); | |
2053 | if (ret != 0) | |
2054 | break; | |
2055 | } | |
2939e1f5 | 2056 | if (ret == -ENOSPC) |
15c35334 | 2057 | return 0; |
ac94a962 KP |
2058 | return ret; |
2059 | } | |
2060 | ||
6911a9b8 | 2061 | int |
856fa198 | 2062 | i915_gem_object_get_pages(struct drm_gem_object *obj) |
673a394b EA |
2063 | { |
2064 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2065 | int page_count, i; | |
2066 | struct address_space *mapping; | |
2067 | struct inode *inode; | |
2068 | struct page *page; | |
2069 | int ret; | |
2070 | ||
856fa198 | 2071 | if (obj_priv->pages_refcount++ != 0) |
673a394b EA |
2072 | return 0; |
2073 | ||
2074 | /* Get the list of pages out of our struct file. They'll be pinned | |
2075 | * at this point until we release them. | |
2076 | */ | |
2077 | page_count = obj->size / PAGE_SIZE; | |
856fa198 | 2078 | BUG_ON(obj_priv->pages != NULL); |
8e7d2b2c | 2079 | obj_priv->pages = drm_calloc_large(page_count, sizeof(struct page *)); |
856fa198 | 2080 | if (obj_priv->pages == NULL) { |
673a394b | 2081 | DRM_ERROR("Faled to allocate page list\n"); |
856fa198 | 2082 | obj_priv->pages_refcount--; |
673a394b EA |
2083 | return -ENOMEM; |
2084 | } | |
2085 | ||
2086 | inode = obj->filp->f_path.dentry->d_inode; | |
2087 | mapping = inode->i_mapping; | |
2088 | for (i = 0; i < page_count; i++) { | |
2089 | page = read_mapping_page(mapping, i, NULL); | |
2090 | if (IS_ERR(page)) { | |
2091 | ret = PTR_ERR(page); | |
2092 | DRM_ERROR("read_mapping_page failed: %d\n", ret); | |
856fa198 | 2093 | i915_gem_object_put_pages(obj); |
673a394b EA |
2094 | return ret; |
2095 | } | |
856fa198 | 2096 | obj_priv->pages[i] = page; |
673a394b | 2097 | } |
280b713b EA |
2098 | |
2099 | if (obj_priv->tiling_mode != I915_TILING_NONE) | |
2100 | i915_gem_object_do_bit_17_swizzle(obj); | |
2101 | ||
673a394b EA |
2102 | return 0; |
2103 | } | |
2104 | ||
de151cf6 JB |
2105 | static void i965_write_fence_reg(struct drm_i915_fence_reg *reg) |
2106 | { | |
2107 | struct drm_gem_object *obj = reg->obj; | |
2108 | struct drm_device *dev = obj->dev; | |
2109 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2110 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2111 | int regnum = obj_priv->fence_reg; | |
2112 | uint64_t val; | |
2113 | ||
2114 | val = (uint64_t)((obj_priv->gtt_offset + obj->size - 4096) & | |
2115 | 0xfffff000) << 32; | |
2116 | val |= obj_priv->gtt_offset & 0xfffff000; | |
2117 | val |= ((obj_priv->stride / 128) - 1) << I965_FENCE_PITCH_SHIFT; | |
2118 | if (obj_priv->tiling_mode == I915_TILING_Y) | |
2119 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; | |
2120 | val |= I965_FENCE_REG_VALID; | |
2121 | ||
2122 | I915_WRITE64(FENCE_REG_965_0 + (regnum * 8), val); | |
2123 | } | |
2124 | ||
2125 | static void i915_write_fence_reg(struct drm_i915_fence_reg *reg) | |
2126 | { | |
2127 | struct drm_gem_object *obj = reg->obj; | |
2128 | struct drm_device *dev = obj->dev; | |
2129 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2130 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2131 | int regnum = obj_priv->fence_reg; | |
0f973f27 | 2132 | int tile_width; |
dc529a4f | 2133 | uint32_t fence_reg, val; |
de151cf6 JB |
2134 | uint32_t pitch_val; |
2135 | ||
2136 | if ((obj_priv->gtt_offset & ~I915_FENCE_START_MASK) || | |
2137 | (obj_priv->gtt_offset & (obj->size - 1))) { | |
f06da264 | 2138 | WARN(1, "%s: object 0x%08x not 1M or size (0x%zx) aligned\n", |
0f973f27 | 2139 | __func__, obj_priv->gtt_offset, obj->size); |
de151cf6 JB |
2140 | return; |
2141 | } | |
2142 | ||
0f973f27 JB |
2143 | if (obj_priv->tiling_mode == I915_TILING_Y && |
2144 | HAS_128_BYTE_Y_TILING(dev)) | |
2145 | tile_width = 128; | |
de151cf6 | 2146 | else |
0f973f27 JB |
2147 | tile_width = 512; |
2148 | ||
2149 | /* Note: pitch better be a power of two tile widths */ | |
2150 | pitch_val = obj_priv->stride / tile_width; | |
2151 | pitch_val = ffs(pitch_val) - 1; | |
de151cf6 JB |
2152 | |
2153 | val = obj_priv->gtt_offset; | |
2154 | if (obj_priv->tiling_mode == I915_TILING_Y) | |
2155 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
2156 | val |= I915_FENCE_SIZE_BITS(obj->size); | |
2157 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
2158 | val |= I830_FENCE_REG_VALID; | |
2159 | ||
dc529a4f EA |
2160 | if (regnum < 8) |
2161 | fence_reg = FENCE_REG_830_0 + (regnum * 4); | |
2162 | else | |
2163 | fence_reg = FENCE_REG_945_8 + ((regnum - 8) * 4); | |
2164 | I915_WRITE(fence_reg, val); | |
de151cf6 JB |
2165 | } |
2166 | ||
2167 | static void i830_write_fence_reg(struct drm_i915_fence_reg *reg) | |
2168 | { | |
2169 | struct drm_gem_object *obj = reg->obj; | |
2170 | struct drm_device *dev = obj->dev; | |
2171 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2172 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2173 | int regnum = obj_priv->fence_reg; | |
2174 | uint32_t val; | |
2175 | uint32_t pitch_val; | |
8d7773a3 | 2176 | uint32_t fence_size_bits; |
de151cf6 | 2177 | |
8d7773a3 | 2178 | if ((obj_priv->gtt_offset & ~I830_FENCE_START_MASK) || |
de151cf6 | 2179 | (obj_priv->gtt_offset & (obj->size - 1))) { |
8d7773a3 | 2180 | WARN(1, "%s: object 0x%08x not 512K or size aligned\n", |
0f973f27 | 2181 | __func__, obj_priv->gtt_offset); |
de151cf6 JB |
2182 | return; |
2183 | } | |
2184 | ||
e76a16de EA |
2185 | pitch_val = obj_priv->stride / 128; |
2186 | pitch_val = ffs(pitch_val) - 1; | |
2187 | WARN_ON(pitch_val > I830_FENCE_MAX_PITCH_VAL); | |
2188 | ||
de151cf6 JB |
2189 | val = obj_priv->gtt_offset; |
2190 | if (obj_priv->tiling_mode == I915_TILING_Y) | |
2191 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
8d7773a3 DV |
2192 | fence_size_bits = I830_FENCE_SIZE_BITS(obj->size); |
2193 | WARN_ON(fence_size_bits & ~0x00000f00); | |
2194 | val |= fence_size_bits; | |
de151cf6 JB |
2195 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; |
2196 | val |= I830_FENCE_REG_VALID; | |
2197 | ||
2198 | I915_WRITE(FENCE_REG_830_0 + (regnum * 4), val); | |
de151cf6 JB |
2199 | } |
2200 | ||
2201 | /** | |
2202 | * i915_gem_object_get_fence_reg - set up a fence reg for an object | |
2203 | * @obj: object to map through a fence reg | |
2204 | * | |
2205 | * When mapping objects through the GTT, userspace wants to be able to write | |
2206 | * to them without having to worry about swizzling if the object is tiled. | |
2207 | * | |
2208 | * This function walks the fence regs looking for a free one for @obj, | |
2209 | * stealing one if it can't find any. | |
2210 | * | |
2211 | * It then sets up the reg based on the object's properties: address, pitch | |
2212 | * and tiling format. | |
2213 | */ | |
8c4b8c3f CW |
2214 | int |
2215 | i915_gem_object_get_fence_reg(struct drm_gem_object *obj) | |
de151cf6 JB |
2216 | { |
2217 | struct drm_device *dev = obj->dev; | |
79e53945 | 2218 | struct drm_i915_private *dev_priv = dev->dev_private; |
de151cf6 JB |
2219 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
2220 | struct drm_i915_fence_reg *reg = NULL; | |
fc7170ba CW |
2221 | struct drm_i915_gem_object *old_obj_priv = NULL; |
2222 | int i, ret, avail; | |
de151cf6 | 2223 | |
a09ba7fa EA |
2224 | /* Just update our place in the LRU if our fence is getting used. */ |
2225 | if (obj_priv->fence_reg != I915_FENCE_REG_NONE) { | |
2226 | list_move_tail(&obj_priv->fence_list, &dev_priv->mm.fence_list); | |
2227 | return 0; | |
2228 | } | |
2229 | ||
de151cf6 JB |
2230 | switch (obj_priv->tiling_mode) { |
2231 | case I915_TILING_NONE: | |
2232 | WARN(1, "allocating a fence for non-tiled object?\n"); | |
2233 | break; | |
2234 | case I915_TILING_X: | |
0f973f27 JB |
2235 | if (!obj_priv->stride) |
2236 | return -EINVAL; | |
2237 | WARN((obj_priv->stride & (512 - 1)), | |
2238 | "object 0x%08x is X tiled but has non-512B pitch\n", | |
2239 | obj_priv->gtt_offset); | |
de151cf6 JB |
2240 | break; |
2241 | case I915_TILING_Y: | |
0f973f27 JB |
2242 | if (!obj_priv->stride) |
2243 | return -EINVAL; | |
2244 | WARN((obj_priv->stride & (128 - 1)), | |
2245 | "object 0x%08x is Y tiled but has non-128B pitch\n", | |
2246 | obj_priv->gtt_offset); | |
de151cf6 JB |
2247 | break; |
2248 | } | |
2249 | ||
2250 | /* First try to find a free reg */ | |
fc7170ba | 2251 | avail = 0; |
de151cf6 JB |
2252 | for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { |
2253 | reg = &dev_priv->fence_regs[i]; | |
2254 | if (!reg->obj) | |
2255 | break; | |
fc7170ba CW |
2256 | |
2257 | old_obj_priv = reg->obj->driver_private; | |
2258 | if (!old_obj_priv->pin_count) | |
2259 | avail++; | |
de151cf6 JB |
2260 | } |
2261 | ||
2262 | /* None available, try to steal one or wait for a user to finish */ | |
2263 | if (i == dev_priv->num_fence_regs) { | |
a09ba7fa | 2264 | struct drm_gem_object *old_obj = NULL; |
de151cf6 | 2265 | |
fc7170ba | 2266 | if (avail == 0) |
2939e1f5 | 2267 | return -ENOSPC; |
fc7170ba | 2268 | |
a09ba7fa EA |
2269 | list_for_each_entry(old_obj_priv, &dev_priv->mm.fence_list, |
2270 | fence_list) { | |
2271 | old_obj = old_obj_priv->obj; | |
d7619c4b CW |
2272 | |
2273 | if (old_obj_priv->pin_count) | |
2274 | continue; | |
2275 | ||
a09ba7fa EA |
2276 | /* Take a reference, as otherwise the wait_rendering |
2277 | * below may cause the object to get freed out from | |
2278 | * under us. | |
2279 | */ | |
2280 | drm_gem_object_reference(old_obj); | |
2281 | ||
d7619c4b CW |
2282 | /* i915 uses fences for GPU access to tiled buffers */ |
2283 | if (IS_I965G(dev) || !old_obj_priv->active) | |
de151cf6 | 2284 | break; |
d7619c4b | 2285 | |
a09ba7fa EA |
2286 | /* This brings the object to the head of the LRU if it |
2287 | * had been written to. The only way this should | |
2288 | * result in us waiting longer than the expected | |
2289 | * optimal amount of time is if there was a | |
2290 | * fence-using buffer later that was read-only. | |
2291 | */ | |
2292 | i915_gem_object_flush_gpu_write_domain(old_obj); | |
2293 | ret = i915_gem_object_wait_rendering(old_obj); | |
58c2fb64 CW |
2294 | if (ret != 0) { |
2295 | drm_gem_object_unreference(old_obj); | |
d7619c4b | 2296 | return ret; |
de151cf6 | 2297 | } |
d7619c4b | 2298 | |
a09ba7fa | 2299 | break; |
de151cf6 JB |
2300 | } |
2301 | ||
2302 | /* | |
2303 | * Zap this virtual mapping so we can set up a fence again | |
2304 | * for this object next time we need it. | |
2305 | */ | |
58c2fb64 CW |
2306 | i915_gem_release_mmap(old_obj); |
2307 | ||
a09ba7fa | 2308 | i = old_obj_priv->fence_reg; |
58c2fb64 CW |
2309 | reg = &dev_priv->fence_regs[i]; |
2310 | ||
de151cf6 | 2311 | old_obj_priv->fence_reg = I915_FENCE_REG_NONE; |
a09ba7fa | 2312 | list_del_init(&old_obj_priv->fence_list); |
58c2fb64 | 2313 | |
a09ba7fa | 2314 | drm_gem_object_unreference(old_obj); |
de151cf6 JB |
2315 | } |
2316 | ||
2317 | obj_priv->fence_reg = i; | |
a09ba7fa EA |
2318 | list_add_tail(&obj_priv->fence_list, &dev_priv->mm.fence_list); |
2319 | ||
de151cf6 JB |
2320 | reg->obj = obj; |
2321 | ||
2322 | if (IS_I965G(dev)) | |
2323 | i965_write_fence_reg(reg); | |
2324 | else if (IS_I9XX(dev)) | |
2325 | i915_write_fence_reg(reg); | |
2326 | else | |
2327 | i830_write_fence_reg(reg); | |
d9ddcb96 EA |
2328 | |
2329 | return 0; | |
de151cf6 JB |
2330 | } |
2331 | ||
2332 | /** | |
2333 | * i915_gem_clear_fence_reg - clear out fence register info | |
2334 | * @obj: object to clear | |
2335 | * | |
2336 | * Zeroes out the fence register itself and clears out the associated | |
2337 | * data structures in dev_priv and obj_priv. | |
2338 | */ | |
2339 | static void | |
2340 | i915_gem_clear_fence_reg(struct drm_gem_object *obj) | |
2341 | { | |
2342 | struct drm_device *dev = obj->dev; | |
79e53945 | 2343 | drm_i915_private_t *dev_priv = dev->dev_private; |
de151cf6 JB |
2344 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
2345 | ||
2346 | if (IS_I965G(dev)) | |
2347 | I915_WRITE64(FENCE_REG_965_0 + (obj_priv->fence_reg * 8), 0); | |
dc529a4f EA |
2348 | else { |
2349 | uint32_t fence_reg; | |
2350 | ||
2351 | if (obj_priv->fence_reg < 8) | |
2352 | fence_reg = FENCE_REG_830_0 + obj_priv->fence_reg * 4; | |
2353 | else | |
2354 | fence_reg = FENCE_REG_945_8 + (obj_priv->fence_reg - | |
2355 | 8) * 4; | |
2356 | ||
2357 | I915_WRITE(fence_reg, 0); | |
2358 | } | |
de151cf6 JB |
2359 | |
2360 | dev_priv->fence_regs[obj_priv->fence_reg].obj = NULL; | |
2361 | obj_priv->fence_reg = I915_FENCE_REG_NONE; | |
a09ba7fa | 2362 | list_del_init(&obj_priv->fence_list); |
de151cf6 JB |
2363 | } |
2364 | ||
52dc7d32 CW |
2365 | /** |
2366 | * i915_gem_object_put_fence_reg - waits on outstanding fenced access | |
2367 | * to the buffer to finish, and then resets the fence register. | |
2368 | * @obj: tiled object holding a fence register. | |
2369 | * | |
2370 | * Zeroes out the fence register itself and clears out the associated | |
2371 | * data structures in dev_priv and obj_priv. | |
2372 | */ | |
2373 | int | |
2374 | i915_gem_object_put_fence_reg(struct drm_gem_object *obj) | |
2375 | { | |
2376 | struct drm_device *dev = obj->dev; | |
2377 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2378 | ||
2379 | if (obj_priv->fence_reg == I915_FENCE_REG_NONE) | |
2380 | return 0; | |
2381 | ||
2382 | /* On the i915, GPU access to tiled buffers is via a fence, | |
2383 | * therefore we must wait for any outstanding access to complete | |
2384 | * before clearing the fence. | |
2385 | */ | |
2386 | if (!IS_I965G(dev)) { | |
2387 | int ret; | |
2388 | ||
2389 | i915_gem_object_flush_gpu_write_domain(obj); | |
2390 | i915_gem_object_flush_gtt_write_domain(obj); | |
2391 | ret = i915_gem_object_wait_rendering(obj); | |
2392 | if (ret != 0) | |
2393 | return ret; | |
2394 | } | |
2395 | ||
2396 | i915_gem_clear_fence_reg (obj); | |
2397 | ||
2398 | return 0; | |
2399 | } | |
2400 | ||
673a394b EA |
2401 | /** |
2402 | * Finds free space in the GTT aperture and binds the object there. | |
2403 | */ | |
2404 | static int | |
2405 | i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment) | |
2406 | { | |
2407 | struct drm_device *dev = obj->dev; | |
2408 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2409 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2410 | struct drm_mm_node *free_space; | |
2411 | int page_count, ret; | |
2412 | ||
9bb2d6f9 EA |
2413 | if (dev_priv->mm.suspended) |
2414 | return -EBUSY; | |
673a394b | 2415 | if (alignment == 0) |
0f973f27 | 2416 | alignment = i915_gem_get_gtt_alignment(obj); |
8d7773a3 | 2417 | if (alignment & (i915_gem_get_gtt_alignment(obj) - 1)) { |
673a394b EA |
2418 | DRM_ERROR("Invalid object alignment requested %u\n", alignment); |
2419 | return -EINVAL; | |
2420 | } | |
2421 | ||
2422 | search_free: | |
2423 | free_space = drm_mm_search_free(&dev_priv->mm.gtt_space, | |
2424 | obj->size, alignment, 0); | |
2425 | if (free_space != NULL) { | |
2426 | obj_priv->gtt_space = drm_mm_get_block(free_space, obj->size, | |
2427 | alignment); | |
2428 | if (obj_priv->gtt_space != NULL) { | |
2429 | obj_priv->gtt_space->private = obj; | |
2430 | obj_priv->gtt_offset = obj_priv->gtt_space->start; | |
2431 | } | |
2432 | } | |
2433 | if (obj_priv->gtt_space == NULL) { | |
5e118f41 CW |
2434 | bool lists_empty; |
2435 | ||
673a394b EA |
2436 | /* If the gtt is empty and we're still having trouble |
2437 | * fitting our object in, we're out of memory. | |
2438 | */ | |
2439 | #if WATCH_LRU | |
2440 | DRM_INFO("%s: GTT full, evicting something\n", __func__); | |
2441 | #endif | |
5e118f41 CW |
2442 | spin_lock(&dev_priv->mm.active_list_lock); |
2443 | lists_empty = (list_empty(&dev_priv->mm.inactive_list) && | |
2444 | list_empty(&dev_priv->mm.flushing_list) && | |
2445 | list_empty(&dev_priv->mm.active_list)); | |
2446 | spin_unlock(&dev_priv->mm.active_list_lock); | |
2447 | if (lists_empty) { | |
673a394b | 2448 | DRM_ERROR("GTT full, but LRU list empty\n"); |
2939e1f5 | 2449 | return -ENOSPC; |
673a394b EA |
2450 | } |
2451 | ||
2452 | ret = i915_gem_evict_something(dev); | |
2453 | if (ret != 0) { | |
ac94a962 KP |
2454 | if (ret != -ERESTARTSYS) |
2455 | DRM_ERROR("Failed to evict a buffer %d\n", ret); | |
673a394b EA |
2456 | return ret; |
2457 | } | |
2458 | goto search_free; | |
2459 | } | |
2460 | ||
2461 | #if WATCH_BUF | |
cfd43c02 | 2462 | DRM_INFO("Binding object of size %zd at 0x%08x\n", |
673a394b EA |
2463 | obj->size, obj_priv->gtt_offset); |
2464 | #endif | |
856fa198 | 2465 | ret = i915_gem_object_get_pages(obj); |
673a394b EA |
2466 | if (ret) { |
2467 | drm_mm_put_block(obj_priv->gtt_space); | |
2468 | obj_priv->gtt_space = NULL; | |
2469 | return ret; | |
2470 | } | |
2471 | ||
2472 | page_count = obj->size / PAGE_SIZE; | |
2473 | /* Create an AGP memory structure pointing at our pages, and bind it | |
2474 | * into the GTT. | |
2475 | */ | |
2476 | obj_priv->agp_mem = drm_agp_bind_pages(dev, | |
856fa198 | 2477 | obj_priv->pages, |
673a394b | 2478 | page_count, |
ba1eb1d8 KP |
2479 | obj_priv->gtt_offset, |
2480 | obj_priv->agp_type); | |
673a394b | 2481 | if (obj_priv->agp_mem == NULL) { |
856fa198 | 2482 | i915_gem_object_put_pages(obj); |
673a394b EA |
2483 | drm_mm_put_block(obj_priv->gtt_space); |
2484 | obj_priv->gtt_space = NULL; | |
2485 | return -ENOMEM; | |
2486 | } | |
2487 | atomic_inc(&dev->gtt_count); | |
2488 | atomic_add(obj->size, &dev->gtt_memory); | |
2489 | ||
2490 | /* Assert that the object is not currently in any GPU domain. As it | |
2491 | * wasn't in the GTT, there shouldn't be any way it could have been in | |
2492 | * a GPU cache | |
2493 | */ | |
21d509e3 CW |
2494 | BUG_ON(obj->read_domains & I915_GEM_GPU_DOMAINS); |
2495 | BUG_ON(obj->write_domain & I915_GEM_GPU_DOMAINS); | |
673a394b EA |
2496 | |
2497 | return 0; | |
2498 | } | |
2499 | ||
2500 | void | |
2501 | i915_gem_clflush_object(struct drm_gem_object *obj) | |
2502 | { | |
2503 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2504 | ||
2505 | /* If we don't have a page list set up, then we're not pinned | |
2506 | * to GPU, and we can ignore the cache flush because it'll happen | |
2507 | * again at bind time. | |
2508 | */ | |
856fa198 | 2509 | if (obj_priv->pages == NULL) |
673a394b EA |
2510 | return; |
2511 | ||
856fa198 | 2512 | drm_clflush_pages(obj_priv->pages, obj->size / PAGE_SIZE); |
673a394b EA |
2513 | } |
2514 | ||
e47c68e9 EA |
2515 | /** Flushes any GPU write domain for the object if it's dirty. */ |
2516 | static void | |
2517 | i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj) | |
2518 | { | |
2519 | struct drm_device *dev = obj->dev; | |
2520 | uint32_t seqno; | |
2521 | ||
2522 | if ((obj->write_domain & I915_GEM_GPU_DOMAINS) == 0) | |
2523 | return; | |
2524 | ||
2525 | /* Queue the GPU write cache flushing we need. */ | |
2526 | i915_gem_flush(dev, 0, obj->write_domain); | |
b962442e | 2527 | seqno = i915_add_request(dev, NULL, obj->write_domain); |
e47c68e9 EA |
2528 | obj->write_domain = 0; |
2529 | i915_gem_object_move_to_active(obj, seqno); | |
2530 | } | |
2531 | ||
2532 | /** Flushes the GTT write domain for the object if it's dirty. */ | |
2533 | static void | |
2534 | i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj) | |
2535 | { | |
2536 | if (obj->write_domain != I915_GEM_DOMAIN_GTT) | |
2537 | return; | |
2538 | ||
2539 | /* No actual flushing is required for the GTT write domain. Writes | |
2540 | * to it immediately go to main memory as far as we know, so there's | |
2541 | * no chipset flush. It also doesn't land in render cache. | |
2542 | */ | |
2543 | obj->write_domain = 0; | |
2544 | } | |
2545 | ||
2546 | /** Flushes the CPU write domain for the object if it's dirty. */ | |
2547 | static void | |
2548 | i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj) | |
2549 | { | |
2550 | struct drm_device *dev = obj->dev; | |
2551 | ||
2552 | if (obj->write_domain != I915_GEM_DOMAIN_CPU) | |
2553 | return; | |
2554 | ||
2555 | i915_gem_clflush_object(obj); | |
2556 | drm_agp_chipset_flush(dev); | |
2557 | obj->write_domain = 0; | |
2558 | } | |
2559 | ||
2ef7eeaa EA |
2560 | /** |
2561 | * Moves a single object to the GTT read, and possibly write domain. | |
2562 | * | |
2563 | * This function returns when the move is complete, including waiting on | |
2564 | * flushes to occur. | |
2565 | */ | |
79e53945 | 2566 | int |
2ef7eeaa EA |
2567 | i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj, int write) |
2568 | { | |
2ef7eeaa | 2569 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
e47c68e9 | 2570 | int ret; |
2ef7eeaa | 2571 | |
02354392 EA |
2572 | /* Not valid to be called on unbound objects. */ |
2573 | if (obj_priv->gtt_space == NULL) | |
2574 | return -EINVAL; | |
2575 | ||
e47c68e9 EA |
2576 | i915_gem_object_flush_gpu_write_domain(obj); |
2577 | /* Wait on any GPU rendering and flushing to occur. */ | |
2578 | ret = i915_gem_object_wait_rendering(obj); | |
2579 | if (ret != 0) | |
2580 | return ret; | |
2581 | ||
2582 | /* If we're writing through the GTT domain, then CPU and GPU caches | |
2583 | * will need to be invalidated at next use. | |
2ef7eeaa | 2584 | */ |
e47c68e9 EA |
2585 | if (write) |
2586 | obj->read_domains &= I915_GEM_DOMAIN_GTT; | |
2ef7eeaa | 2587 | |
e47c68e9 | 2588 | i915_gem_object_flush_cpu_write_domain(obj); |
2ef7eeaa | 2589 | |
e47c68e9 EA |
2590 | /* It should now be out of any other write domains, and we can update |
2591 | * the domain values for our changes. | |
2592 | */ | |
2593 | BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_GTT) != 0); | |
2594 | obj->read_domains |= I915_GEM_DOMAIN_GTT; | |
2595 | if (write) { | |
2596 | obj->write_domain = I915_GEM_DOMAIN_GTT; | |
2597 | obj_priv->dirty = 1; | |
2ef7eeaa EA |
2598 | } |
2599 | ||
e47c68e9 EA |
2600 | return 0; |
2601 | } | |
2602 | ||
2603 | /** | |
2604 | * Moves a single object to the CPU read, and possibly write domain. | |
2605 | * | |
2606 | * This function returns when the move is complete, including waiting on | |
2607 | * flushes to occur. | |
2608 | */ | |
2609 | static int | |
2610 | i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, int write) | |
2611 | { | |
e47c68e9 EA |
2612 | int ret; |
2613 | ||
2614 | i915_gem_object_flush_gpu_write_domain(obj); | |
2ef7eeaa | 2615 | /* Wait on any GPU rendering and flushing to occur. */ |
e47c68e9 EA |
2616 | ret = i915_gem_object_wait_rendering(obj); |
2617 | if (ret != 0) | |
2618 | return ret; | |
2ef7eeaa | 2619 | |
e47c68e9 | 2620 | i915_gem_object_flush_gtt_write_domain(obj); |
2ef7eeaa | 2621 | |
e47c68e9 EA |
2622 | /* If we have a partially-valid cache of the object in the CPU, |
2623 | * finish invalidating it and free the per-page flags. | |
2ef7eeaa | 2624 | */ |
e47c68e9 | 2625 | i915_gem_object_set_to_full_cpu_read_domain(obj); |
2ef7eeaa | 2626 | |
e47c68e9 EA |
2627 | /* Flush the CPU cache if it's still invalid. */ |
2628 | if ((obj->read_domains & I915_GEM_DOMAIN_CPU) == 0) { | |
2ef7eeaa | 2629 | i915_gem_clflush_object(obj); |
2ef7eeaa | 2630 | |
e47c68e9 | 2631 | obj->read_domains |= I915_GEM_DOMAIN_CPU; |
2ef7eeaa EA |
2632 | } |
2633 | ||
2634 | /* It should now be out of any other write domains, and we can update | |
2635 | * the domain values for our changes. | |
2636 | */ | |
e47c68e9 EA |
2637 | BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_CPU) != 0); |
2638 | ||
2639 | /* If we're writing through the CPU, then the GPU read domains will | |
2640 | * need to be invalidated at next use. | |
2641 | */ | |
2642 | if (write) { | |
2643 | obj->read_domains &= I915_GEM_DOMAIN_CPU; | |
2644 | obj->write_domain = I915_GEM_DOMAIN_CPU; | |
2645 | } | |
2ef7eeaa EA |
2646 | |
2647 | return 0; | |
2648 | } | |
2649 | ||
673a394b EA |
2650 | /* |
2651 | * Set the next domain for the specified object. This | |
2652 | * may not actually perform the necessary flushing/invaliding though, | |
2653 | * as that may want to be batched with other set_domain operations | |
2654 | * | |
2655 | * This is (we hope) the only really tricky part of gem. The goal | |
2656 | * is fairly simple -- track which caches hold bits of the object | |
2657 | * and make sure they remain coherent. A few concrete examples may | |
2658 | * help to explain how it works. For shorthand, we use the notation | |
2659 | * (read_domains, write_domain), e.g. (CPU, CPU) to indicate the | |
2660 | * a pair of read and write domain masks. | |
2661 | * | |
2662 | * Case 1: the batch buffer | |
2663 | * | |
2664 | * 1. Allocated | |
2665 | * 2. Written by CPU | |
2666 | * 3. Mapped to GTT | |
2667 | * 4. Read by GPU | |
2668 | * 5. Unmapped from GTT | |
2669 | * 6. Freed | |
2670 | * | |
2671 | * Let's take these a step at a time | |
2672 | * | |
2673 | * 1. Allocated | |
2674 | * Pages allocated from the kernel may still have | |
2675 | * cache contents, so we set them to (CPU, CPU) always. | |
2676 | * 2. Written by CPU (using pwrite) | |
2677 | * The pwrite function calls set_domain (CPU, CPU) and | |
2678 | * this function does nothing (as nothing changes) | |
2679 | * 3. Mapped by GTT | |
2680 | * This function asserts that the object is not | |
2681 | * currently in any GPU-based read or write domains | |
2682 | * 4. Read by GPU | |
2683 | * i915_gem_execbuffer calls set_domain (COMMAND, 0). | |
2684 | * As write_domain is zero, this function adds in the | |
2685 | * current read domains (CPU+COMMAND, 0). | |
2686 | * flush_domains is set to CPU. | |
2687 | * invalidate_domains is set to COMMAND | |
2688 | * clflush is run to get data out of the CPU caches | |
2689 | * then i915_dev_set_domain calls i915_gem_flush to | |
2690 | * emit an MI_FLUSH and drm_agp_chipset_flush | |
2691 | * 5. Unmapped from GTT | |
2692 | * i915_gem_object_unbind calls set_domain (CPU, CPU) | |
2693 | * flush_domains and invalidate_domains end up both zero | |
2694 | * so no flushing/invalidating happens | |
2695 | * 6. Freed | |
2696 | * yay, done | |
2697 | * | |
2698 | * Case 2: The shared render buffer | |
2699 | * | |
2700 | * 1. Allocated | |
2701 | * 2. Mapped to GTT | |
2702 | * 3. Read/written by GPU | |
2703 | * 4. set_domain to (CPU,CPU) | |
2704 | * 5. Read/written by CPU | |
2705 | * 6. Read/written by GPU | |
2706 | * | |
2707 | * 1. Allocated | |
2708 | * Same as last example, (CPU, CPU) | |
2709 | * 2. Mapped to GTT | |
2710 | * Nothing changes (assertions find that it is not in the GPU) | |
2711 | * 3. Read/written by GPU | |
2712 | * execbuffer calls set_domain (RENDER, RENDER) | |
2713 | * flush_domains gets CPU | |
2714 | * invalidate_domains gets GPU | |
2715 | * clflush (obj) | |
2716 | * MI_FLUSH and drm_agp_chipset_flush | |
2717 | * 4. set_domain (CPU, CPU) | |
2718 | * flush_domains gets GPU | |
2719 | * invalidate_domains gets CPU | |
2720 | * wait_rendering (obj) to make sure all drawing is complete. | |
2721 | * This will include an MI_FLUSH to get the data from GPU | |
2722 | * to memory | |
2723 | * clflush (obj) to invalidate the CPU cache | |
2724 | * Another MI_FLUSH in i915_gem_flush (eliminate this somehow?) | |
2725 | * 5. Read/written by CPU | |
2726 | * cache lines are loaded and dirtied | |
2727 | * 6. Read written by GPU | |
2728 | * Same as last GPU access | |
2729 | * | |
2730 | * Case 3: The constant buffer | |
2731 | * | |
2732 | * 1. Allocated | |
2733 | * 2. Written by CPU | |
2734 | * 3. Read by GPU | |
2735 | * 4. Updated (written) by CPU again | |
2736 | * 5. Read by GPU | |
2737 | * | |
2738 | * 1. Allocated | |
2739 | * (CPU, CPU) | |
2740 | * 2. Written by CPU | |
2741 | * (CPU, CPU) | |
2742 | * 3. Read by GPU | |
2743 | * (CPU+RENDER, 0) | |
2744 | * flush_domains = CPU | |
2745 | * invalidate_domains = RENDER | |
2746 | * clflush (obj) | |
2747 | * MI_FLUSH | |
2748 | * drm_agp_chipset_flush | |
2749 | * 4. Updated (written) by CPU again | |
2750 | * (CPU, CPU) | |
2751 | * flush_domains = 0 (no previous write domain) | |
2752 | * invalidate_domains = 0 (no new read domains) | |
2753 | * 5. Read by GPU | |
2754 | * (CPU+RENDER, 0) | |
2755 | * flush_domains = CPU | |
2756 | * invalidate_domains = RENDER | |
2757 | * clflush (obj) | |
2758 | * MI_FLUSH | |
2759 | * drm_agp_chipset_flush | |
2760 | */ | |
c0d90829 | 2761 | static void |
8b0e378a | 2762 | i915_gem_object_set_to_gpu_domain(struct drm_gem_object *obj) |
673a394b EA |
2763 | { |
2764 | struct drm_device *dev = obj->dev; | |
2765 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2766 | uint32_t invalidate_domains = 0; | |
2767 | uint32_t flush_domains = 0; | |
e47c68e9 | 2768 | |
8b0e378a EA |
2769 | BUG_ON(obj->pending_read_domains & I915_GEM_DOMAIN_CPU); |
2770 | BUG_ON(obj->pending_write_domain == I915_GEM_DOMAIN_CPU); | |
673a394b | 2771 | |
652c393a JB |
2772 | intel_mark_busy(dev, obj); |
2773 | ||
673a394b EA |
2774 | #if WATCH_BUF |
2775 | DRM_INFO("%s: object %p read %08x -> %08x write %08x -> %08x\n", | |
2776 | __func__, obj, | |
8b0e378a EA |
2777 | obj->read_domains, obj->pending_read_domains, |
2778 | obj->write_domain, obj->pending_write_domain); | |
673a394b EA |
2779 | #endif |
2780 | /* | |
2781 | * If the object isn't moving to a new write domain, | |
2782 | * let the object stay in multiple read domains | |
2783 | */ | |
8b0e378a EA |
2784 | if (obj->pending_write_domain == 0) |
2785 | obj->pending_read_domains |= obj->read_domains; | |
673a394b EA |
2786 | else |
2787 | obj_priv->dirty = 1; | |
2788 | ||
2789 | /* | |
2790 | * Flush the current write domain if | |
2791 | * the new read domains don't match. Invalidate | |
2792 | * any read domains which differ from the old | |
2793 | * write domain | |
2794 | */ | |
8b0e378a EA |
2795 | if (obj->write_domain && |
2796 | obj->write_domain != obj->pending_read_domains) { | |
673a394b | 2797 | flush_domains |= obj->write_domain; |
8b0e378a EA |
2798 | invalidate_domains |= |
2799 | obj->pending_read_domains & ~obj->write_domain; | |
673a394b EA |
2800 | } |
2801 | /* | |
2802 | * Invalidate any read caches which may have | |
2803 | * stale data. That is, any new read domains. | |
2804 | */ | |
8b0e378a | 2805 | invalidate_domains |= obj->pending_read_domains & ~obj->read_domains; |
673a394b EA |
2806 | if ((flush_domains | invalidate_domains) & I915_GEM_DOMAIN_CPU) { |
2807 | #if WATCH_BUF | |
2808 | DRM_INFO("%s: CPU domain flush %08x invalidate %08x\n", | |
2809 | __func__, flush_domains, invalidate_domains); | |
2810 | #endif | |
673a394b EA |
2811 | i915_gem_clflush_object(obj); |
2812 | } | |
2813 | ||
efbeed96 EA |
2814 | /* The actual obj->write_domain will be updated with |
2815 | * pending_write_domain after we emit the accumulated flush for all | |
2816 | * of our domain changes in execbuffers (which clears objects' | |
2817 | * write_domains). So if we have a current write domain that we | |
2818 | * aren't changing, set pending_write_domain to that. | |
2819 | */ | |
2820 | if (flush_domains == 0 && obj->pending_write_domain == 0) | |
2821 | obj->pending_write_domain = obj->write_domain; | |
8b0e378a | 2822 | obj->read_domains = obj->pending_read_domains; |
673a394b EA |
2823 | |
2824 | dev->invalidate_domains |= invalidate_domains; | |
2825 | dev->flush_domains |= flush_domains; | |
2826 | #if WATCH_BUF | |
2827 | DRM_INFO("%s: read %08x write %08x invalidate %08x flush %08x\n", | |
2828 | __func__, | |
2829 | obj->read_domains, obj->write_domain, | |
2830 | dev->invalidate_domains, dev->flush_domains); | |
2831 | #endif | |
673a394b EA |
2832 | } |
2833 | ||
2834 | /** | |
e47c68e9 | 2835 | * Moves the object from a partially CPU read to a full one. |
673a394b | 2836 | * |
e47c68e9 EA |
2837 | * Note that this only resolves i915_gem_object_set_cpu_read_domain_range(), |
2838 | * and doesn't handle transitioning from !(read_domains & I915_GEM_DOMAIN_CPU). | |
673a394b | 2839 | */ |
e47c68e9 EA |
2840 | static void |
2841 | i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object *obj) | |
673a394b EA |
2842 | { |
2843 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
673a394b | 2844 | |
e47c68e9 EA |
2845 | if (!obj_priv->page_cpu_valid) |
2846 | return; | |
2847 | ||
2848 | /* If we're partially in the CPU read domain, finish moving it in. | |
2849 | */ | |
2850 | if (obj->read_domains & I915_GEM_DOMAIN_CPU) { | |
2851 | int i; | |
2852 | ||
2853 | for (i = 0; i <= (obj->size - 1) / PAGE_SIZE; i++) { | |
2854 | if (obj_priv->page_cpu_valid[i]) | |
2855 | continue; | |
856fa198 | 2856 | drm_clflush_pages(obj_priv->pages + i, 1); |
e47c68e9 | 2857 | } |
e47c68e9 EA |
2858 | } |
2859 | ||
2860 | /* Free the page_cpu_valid mappings which are now stale, whether | |
2861 | * or not we've got I915_GEM_DOMAIN_CPU. | |
2862 | */ | |
9a298b2a | 2863 | kfree(obj_priv->page_cpu_valid); |
e47c68e9 EA |
2864 | obj_priv->page_cpu_valid = NULL; |
2865 | } | |
2866 | ||
2867 | /** | |
2868 | * Set the CPU read domain on a range of the object. | |
2869 | * | |
2870 | * The object ends up with I915_GEM_DOMAIN_CPU in its read flags although it's | |
2871 | * not entirely valid. The page_cpu_valid member of the object flags which | |
2872 | * pages have been flushed, and will be respected by | |
2873 | * i915_gem_object_set_to_cpu_domain() if it's called on to get a valid mapping | |
2874 | * of the whole object. | |
2875 | * | |
2876 | * This function returns when the move is complete, including waiting on | |
2877 | * flushes to occur. | |
2878 | */ | |
2879 | static int | |
2880 | i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj, | |
2881 | uint64_t offset, uint64_t size) | |
2882 | { | |
2883 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2884 | int i, ret; | |
673a394b | 2885 | |
e47c68e9 EA |
2886 | if (offset == 0 && size == obj->size) |
2887 | return i915_gem_object_set_to_cpu_domain(obj, 0); | |
673a394b | 2888 | |
e47c68e9 EA |
2889 | i915_gem_object_flush_gpu_write_domain(obj); |
2890 | /* Wait on any GPU rendering and flushing to occur. */ | |
6a47baa6 | 2891 | ret = i915_gem_object_wait_rendering(obj); |
e47c68e9 | 2892 | if (ret != 0) |
6a47baa6 | 2893 | return ret; |
e47c68e9 EA |
2894 | i915_gem_object_flush_gtt_write_domain(obj); |
2895 | ||
2896 | /* If we're already fully in the CPU read domain, we're done. */ | |
2897 | if (obj_priv->page_cpu_valid == NULL && | |
2898 | (obj->read_domains & I915_GEM_DOMAIN_CPU) != 0) | |
2899 | return 0; | |
673a394b | 2900 | |
e47c68e9 EA |
2901 | /* Otherwise, create/clear the per-page CPU read domain flag if we're |
2902 | * newly adding I915_GEM_DOMAIN_CPU | |
2903 | */ | |
673a394b | 2904 | if (obj_priv->page_cpu_valid == NULL) { |
9a298b2a EA |
2905 | obj_priv->page_cpu_valid = kzalloc(obj->size / PAGE_SIZE, |
2906 | GFP_KERNEL); | |
e47c68e9 EA |
2907 | if (obj_priv->page_cpu_valid == NULL) |
2908 | return -ENOMEM; | |
2909 | } else if ((obj->read_domains & I915_GEM_DOMAIN_CPU) == 0) | |
2910 | memset(obj_priv->page_cpu_valid, 0, obj->size / PAGE_SIZE); | |
673a394b EA |
2911 | |
2912 | /* Flush the cache on any pages that are still invalid from the CPU's | |
2913 | * perspective. | |
2914 | */ | |
e47c68e9 EA |
2915 | for (i = offset / PAGE_SIZE; i <= (offset + size - 1) / PAGE_SIZE; |
2916 | i++) { | |
673a394b EA |
2917 | if (obj_priv->page_cpu_valid[i]) |
2918 | continue; | |
2919 | ||
856fa198 | 2920 | drm_clflush_pages(obj_priv->pages + i, 1); |
673a394b EA |
2921 | |
2922 | obj_priv->page_cpu_valid[i] = 1; | |
2923 | } | |
2924 | ||
e47c68e9 EA |
2925 | /* It should now be out of any other write domains, and we can update |
2926 | * the domain values for our changes. | |
2927 | */ | |
2928 | BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_CPU) != 0); | |
2929 | ||
2930 | obj->read_domains |= I915_GEM_DOMAIN_CPU; | |
2931 | ||
673a394b EA |
2932 | return 0; |
2933 | } | |
2934 | ||
673a394b EA |
2935 | /** |
2936 | * Pin an object to the GTT and evaluate the relocations landing in it. | |
2937 | */ | |
2938 | static int | |
2939 | i915_gem_object_pin_and_relocate(struct drm_gem_object *obj, | |
2940 | struct drm_file *file_priv, | |
40a5f0de EA |
2941 | struct drm_i915_gem_exec_object *entry, |
2942 | struct drm_i915_gem_relocation_entry *relocs) | |
673a394b EA |
2943 | { |
2944 | struct drm_device *dev = obj->dev; | |
0839ccb8 | 2945 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b EA |
2946 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
2947 | int i, ret; | |
0839ccb8 | 2948 | void __iomem *reloc_page; |
673a394b EA |
2949 | |
2950 | /* Choose the GTT offset for our buffer and put it there. */ | |
2951 | ret = i915_gem_object_pin(obj, (uint32_t) entry->alignment); | |
2952 | if (ret) | |
2953 | return ret; | |
2954 | ||
2955 | entry->offset = obj_priv->gtt_offset; | |
2956 | ||
673a394b EA |
2957 | /* Apply the relocations, using the GTT aperture to avoid cache |
2958 | * flushing requirements. | |
2959 | */ | |
2960 | for (i = 0; i < entry->relocation_count; i++) { | |
40a5f0de | 2961 | struct drm_i915_gem_relocation_entry *reloc= &relocs[i]; |
673a394b EA |
2962 | struct drm_gem_object *target_obj; |
2963 | struct drm_i915_gem_object *target_obj_priv; | |
3043c60c EA |
2964 | uint32_t reloc_val, reloc_offset; |
2965 | uint32_t __iomem *reloc_entry; | |
673a394b | 2966 | |
673a394b | 2967 | target_obj = drm_gem_object_lookup(obj->dev, file_priv, |
40a5f0de | 2968 | reloc->target_handle); |
673a394b EA |
2969 | if (target_obj == NULL) { |
2970 | i915_gem_object_unpin(obj); | |
2971 | return -EBADF; | |
2972 | } | |
2973 | target_obj_priv = target_obj->driver_private; | |
2974 | ||
2975 | /* The target buffer should have appeared before us in the | |
2976 | * exec_object list, so it should have a GTT space bound by now. | |
2977 | */ | |
2978 | if (target_obj_priv->gtt_space == NULL) { | |
2979 | DRM_ERROR("No GTT space found for object %d\n", | |
40a5f0de | 2980 | reloc->target_handle); |
673a394b EA |
2981 | drm_gem_object_unreference(target_obj); |
2982 | i915_gem_object_unpin(obj); | |
2983 | return -EINVAL; | |
2984 | } | |
2985 | ||
40a5f0de | 2986 | if (reloc->offset > obj->size - 4) { |
673a394b EA |
2987 | DRM_ERROR("Relocation beyond object bounds: " |
2988 | "obj %p target %d offset %d size %d.\n", | |
40a5f0de EA |
2989 | obj, reloc->target_handle, |
2990 | (int) reloc->offset, (int) obj->size); | |
673a394b EA |
2991 | drm_gem_object_unreference(target_obj); |
2992 | i915_gem_object_unpin(obj); | |
2993 | return -EINVAL; | |
2994 | } | |
40a5f0de | 2995 | if (reloc->offset & 3) { |
673a394b EA |
2996 | DRM_ERROR("Relocation not 4-byte aligned: " |
2997 | "obj %p target %d offset %d.\n", | |
40a5f0de EA |
2998 | obj, reloc->target_handle, |
2999 | (int) reloc->offset); | |
673a394b EA |
3000 | drm_gem_object_unreference(target_obj); |
3001 | i915_gem_object_unpin(obj); | |
3002 | return -EINVAL; | |
3003 | } | |
3004 | ||
40a5f0de EA |
3005 | if (reloc->write_domain & I915_GEM_DOMAIN_CPU || |
3006 | reloc->read_domains & I915_GEM_DOMAIN_CPU) { | |
e47c68e9 EA |
3007 | DRM_ERROR("reloc with read/write CPU domains: " |
3008 | "obj %p target %d offset %d " | |
3009 | "read %08x write %08x", | |
40a5f0de EA |
3010 | obj, reloc->target_handle, |
3011 | (int) reloc->offset, | |
3012 | reloc->read_domains, | |
3013 | reloc->write_domain); | |
491152b8 CW |
3014 | drm_gem_object_unreference(target_obj); |
3015 | i915_gem_object_unpin(obj); | |
e47c68e9 EA |
3016 | return -EINVAL; |
3017 | } | |
3018 | ||
40a5f0de EA |
3019 | if (reloc->write_domain && target_obj->pending_write_domain && |
3020 | reloc->write_domain != target_obj->pending_write_domain) { | |
673a394b EA |
3021 | DRM_ERROR("Write domain conflict: " |
3022 | "obj %p target %d offset %d " | |
3023 | "new %08x old %08x\n", | |
40a5f0de EA |
3024 | obj, reloc->target_handle, |
3025 | (int) reloc->offset, | |
3026 | reloc->write_domain, | |
673a394b EA |
3027 | target_obj->pending_write_domain); |
3028 | drm_gem_object_unreference(target_obj); | |
3029 | i915_gem_object_unpin(obj); | |
3030 | return -EINVAL; | |
3031 | } | |
3032 | ||
3033 | #if WATCH_RELOC | |
3034 | DRM_INFO("%s: obj %p offset %08x target %d " | |
3035 | "read %08x write %08x gtt %08x " | |
3036 | "presumed %08x delta %08x\n", | |
3037 | __func__, | |
3038 | obj, | |
40a5f0de EA |
3039 | (int) reloc->offset, |
3040 | (int) reloc->target_handle, | |
3041 | (int) reloc->read_domains, | |
3042 | (int) reloc->write_domain, | |
673a394b | 3043 | (int) target_obj_priv->gtt_offset, |
40a5f0de EA |
3044 | (int) reloc->presumed_offset, |
3045 | reloc->delta); | |
673a394b EA |
3046 | #endif |
3047 | ||
40a5f0de EA |
3048 | target_obj->pending_read_domains |= reloc->read_domains; |
3049 | target_obj->pending_write_domain |= reloc->write_domain; | |
673a394b EA |
3050 | |
3051 | /* If the relocation already has the right value in it, no | |
3052 | * more work needs to be done. | |
3053 | */ | |
40a5f0de | 3054 | if (target_obj_priv->gtt_offset == reloc->presumed_offset) { |
673a394b EA |
3055 | drm_gem_object_unreference(target_obj); |
3056 | continue; | |
3057 | } | |
3058 | ||
2ef7eeaa EA |
3059 | ret = i915_gem_object_set_to_gtt_domain(obj, 1); |
3060 | if (ret != 0) { | |
3061 | drm_gem_object_unreference(target_obj); | |
3062 | i915_gem_object_unpin(obj); | |
3063 | return -EINVAL; | |
673a394b EA |
3064 | } |
3065 | ||
3066 | /* Map the page containing the relocation we're going to | |
3067 | * perform. | |
3068 | */ | |
40a5f0de | 3069 | reloc_offset = obj_priv->gtt_offset + reloc->offset; |
0839ccb8 KP |
3070 | reloc_page = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping, |
3071 | (reloc_offset & | |
3072 | ~(PAGE_SIZE - 1))); | |
3043c60c | 3073 | reloc_entry = (uint32_t __iomem *)(reloc_page + |
0839ccb8 | 3074 | (reloc_offset & (PAGE_SIZE - 1))); |
40a5f0de | 3075 | reloc_val = target_obj_priv->gtt_offset + reloc->delta; |
673a394b EA |
3076 | |
3077 | #if WATCH_BUF | |
3078 | DRM_INFO("Applied relocation: %p@0x%08x %08x -> %08x\n", | |
40a5f0de | 3079 | obj, (unsigned int) reloc->offset, |
673a394b EA |
3080 | readl(reloc_entry), reloc_val); |
3081 | #endif | |
3082 | writel(reloc_val, reloc_entry); | |
0839ccb8 | 3083 | io_mapping_unmap_atomic(reloc_page); |
673a394b | 3084 | |
40a5f0de EA |
3085 | /* The updated presumed offset for this entry will be |
3086 | * copied back out to the user. | |
673a394b | 3087 | */ |
40a5f0de | 3088 | reloc->presumed_offset = target_obj_priv->gtt_offset; |
673a394b EA |
3089 | |
3090 | drm_gem_object_unreference(target_obj); | |
3091 | } | |
3092 | ||
673a394b EA |
3093 | #if WATCH_BUF |
3094 | if (0) | |
3095 | i915_gem_dump_object(obj, 128, __func__, ~0); | |
3096 | #endif | |
3097 | return 0; | |
3098 | } | |
3099 | ||
3100 | /** Dispatch a batchbuffer to the ring | |
3101 | */ | |
3102 | static int | |
3103 | i915_dispatch_gem_execbuffer(struct drm_device *dev, | |
3104 | struct drm_i915_gem_execbuffer *exec, | |
201361a5 | 3105 | struct drm_clip_rect *cliprects, |
673a394b EA |
3106 | uint64_t exec_offset) |
3107 | { | |
3108 | drm_i915_private_t *dev_priv = dev->dev_private; | |
673a394b EA |
3109 | int nbox = exec->num_cliprects; |
3110 | int i = 0, count; | |
83d60795 | 3111 | uint32_t exec_start, exec_len; |
673a394b EA |
3112 | RING_LOCALS; |
3113 | ||
3114 | exec_start = (uint32_t) exec_offset + exec->batch_start_offset; | |
3115 | exec_len = (uint32_t) exec->batch_len; | |
3116 | ||
673a394b EA |
3117 | count = nbox ? nbox : 1; |
3118 | ||
3119 | for (i = 0; i < count; i++) { | |
3120 | if (i < nbox) { | |
201361a5 | 3121 | int ret = i915_emit_box(dev, cliprects, i, |
673a394b EA |
3122 | exec->DR1, exec->DR4); |
3123 | if (ret) | |
3124 | return ret; | |
3125 | } | |
3126 | ||
3127 | if (IS_I830(dev) || IS_845G(dev)) { | |
3128 | BEGIN_LP_RING(4); | |
3129 | OUT_RING(MI_BATCH_BUFFER); | |
3130 | OUT_RING(exec_start | MI_BATCH_NON_SECURE); | |
3131 | OUT_RING(exec_start + exec_len - 4); | |
3132 | OUT_RING(0); | |
3133 | ADVANCE_LP_RING(); | |
3134 | } else { | |
3135 | BEGIN_LP_RING(2); | |
3136 | if (IS_I965G(dev)) { | |
3137 | OUT_RING(MI_BATCH_BUFFER_START | | |
3138 | (2 << 6) | | |
3139 | MI_BATCH_NON_SECURE_I965); | |
3140 | OUT_RING(exec_start); | |
3141 | } else { | |
3142 | OUT_RING(MI_BATCH_BUFFER_START | | |
3143 | (2 << 6)); | |
3144 | OUT_RING(exec_start | MI_BATCH_NON_SECURE); | |
3145 | } | |
3146 | ADVANCE_LP_RING(); | |
3147 | } | |
3148 | } | |
3149 | ||
3150 | /* XXX breadcrumb */ | |
3151 | return 0; | |
3152 | } | |
3153 | ||
3154 | /* Throttle our rendering by waiting until the ring has completed our requests | |
3155 | * emitted over 20 msec ago. | |
3156 | * | |
b962442e EA |
3157 | * Note that if we were to use the current jiffies each time around the loop, |
3158 | * we wouldn't escape the function with any frames outstanding if the time to | |
3159 | * render a frame was over 20ms. | |
3160 | * | |
673a394b EA |
3161 | * This should get us reasonable parallelism between CPU and GPU but also |
3162 | * relatively low latency when blocking on a particular request to finish. | |
3163 | */ | |
3164 | static int | |
3165 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file_priv) | |
3166 | { | |
3167 | struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv; | |
3168 | int ret = 0; | |
b962442e | 3169 | unsigned long recent_enough = jiffies - msecs_to_jiffies(20); |
673a394b EA |
3170 | |
3171 | mutex_lock(&dev->struct_mutex); | |
b962442e EA |
3172 | while (!list_empty(&i915_file_priv->mm.request_list)) { |
3173 | struct drm_i915_gem_request *request; | |
3174 | ||
3175 | request = list_first_entry(&i915_file_priv->mm.request_list, | |
3176 | struct drm_i915_gem_request, | |
3177 | client_list); | |
3178 | ||
3179 | if (time_after_eq(request->emitted_jiffies, recent_enough)) | |
3180 | break; | |
3181 | ||
3182 | ret = i915_wait_request(dev, request->seqno); | |
3183 | if (ret != 0) | |
3184 | break; | |
3185 | } | |
673a394b | 3186 | mutex_unlock(&dev->struct_mutex); |
b962442e | 3187 | |
673a394b EA |
3188 | return ret; |
3189 | } | |
3190 | ||
40a5f0de EA |
3191 | static int |
3192 | i915_gem_get_relocs_from_user(struct drm_i915_gem_exec_object *exec_list, | |
3193 | uint32_t buffer_count, | |
3194 | struct drm_i915_gem_relocation_entry **relocs) | |
3195 | { | |
3196 | uint32_t reloc_count = 0, reloc_index = 0, i; | |
3197 | int ret; | |
3198 | ||
3199 | *relocs = NULL; | |
3200 | for (i = 0; i < buffer_count; i++) { | |
3201 | if (reloc_count + exec_list[i].relocation_count < reloc_count) | |
3202 | return -EINVAL; | |
3203 | reloc_count += exec_list[i].relocation_count; | |
3204 | } | |
3205 | ||
8e7d2b2c | 3206 | *relocs = drm_calloc_large(reloc_count, sizeof(**relocs)); |
40a5f0de EA |
3207 | if (*relocs == NULL) |
3208 | return -ENOMEM; | |
3209 | ||
3210 | for (i = 0; i < buffer_count; i++) { | |
3211 | struct drm_i915_gem_relocation_entry __user *user_relocs; | |
3212 | ||
3213 | user_relocs = (void __user *)(uintptr_t)exec_list[i].relocs_ptr; | |
3214 | ||
3215 | ret = copy_from_user(&(*relocs)[reloc_index], | |
3216 | user_relocs, | |
3217 | exec_list[i].relocation_count * | |
3218 | sizeof(**relocs)); | |
3219 | if (ret != 0) { | |
8e7d2b2c | 3220 | drm_free_large(*relocs); |
40a5f0de | 3221 | *relocs = NULL; |
2bc43b5c | 3222 | return -EFAULT; |
40a5f0de EA |
3223 | } |
3224 | ||
3225 | reloc_index += exec_list[i].relocation_count; | |
3226 | } | |
3227 | ||
2bc43b5c | 3228 | return 0; |
40a5f0de EA |
3229 | } |
3230 | ||
3231 | static int | |
3232 | i915_gem_put_relocs_to_user(struct drm_i915_gem_exec_object *exec_list, | |
3233 | uint32_t buffer_count, | |
3234 | struct drm_i915_gem_relocation_entry *relocs) | |
3235 | { | |
3236 | uint32_t reloc_count = 0, i; | |
2bc43b5c | 3237 | int ret = 0; |
40a5f0de EA |
3238 | |
3239 | for (i = 0; i < buffer_count; i++) { | |
3240 | struct drm_i915_gem_relocation_entry __user *user_relocs; | |
2bc43b5c | 3241 | int unwritten; |
40a5f0de EA |
3242 | |
3243 | user_relocs = (void __user *)(uintptr_t)exec_list[i].relocs_ptr; | |
3244 | ||
2bc43b5c FM |
3245 | unwritten = copy_to_user(user_relocs, |
3246 | &relocs[reloc_count], | |
3247 | exec_list[i].relocation_count * | |
3248 | sizeof(*relocs)); | |
3249 | ||
3250 | if (unwritten) { | |
3251 | ret = -EFAULT; | |
3252 | goto err; | |
40a5f0de EA |
3253 | } |
3254 | ||
3255 | reloc_count += exec_list[i].relocation_count; | |
3256 | } | |
3257 | ||
2bc43b5c | 3258 | err: |
8e7d2b2c | 3259 | drm_free_large(relocs); |
40a5f0de EA |
3260 | |
3261 | return ret; | |
3262 | } | |
3263 | ||
83d60795 CW |
3264 | static int |
3265 | i915_gem_check_execbuffer (struct drm_i915_gem_execbuffer *exec, | |
3266 | uint64_t exec_offset) | |
3267 | { | |
3268 | uint32_t exec_start, exec_len; | |
3269 | ||
3270 | exec_start = (uint32_t) exec_offset + exec->batch_start_offset; | |
3271 | exec_len = (uint32_t) exec->batch_len; | |
3272 | ||
3273 | if ((exec_start | exec_len) & 0x7) | |
3274 | return -EINVAL; | |
3275 | ||
3276 | if (!exec_start) | |
3277 | return -EINVAL; | |
3278 | ||
3279 | return 0; | |
3280 | } | |
3281 | ||
673a394b EA |
3282 | int |
3283 | i915_gem_execbuffer(struct drm_device *dev, void *data, | |
3284 | struct drm_file *file_priv) | |
3285 | { | |
3286 | drm_i915_private_t *dev_priv = dev->dev_private; | |
673a394b EA |
3287 | struct drm_i915_gem_execbuffer *args = data; |
3288 | struct drm_i915_gem_exec_object *exec_list = NULL; | |
3289 | struct drm_gem_object **object_list = NULL; | |
3290 | struct drm_gem_object *batch_obj; | |
b70d11da | 3291 | struct drm_i915_gem_object *obj_priv; |
201361a5 | 3292 | struct drm_clip_rect *cliprects = NULL; |
40a5f0de EA |
3293 | struct drm_i915_gem_relocation_entry *relocs; |
3294 | int ret, ret2, i, pinned = 0; | |
673a394b | 3295 | uint64_t exec_offset; |
40a5f0de | 3296 | uint32_t seqno, flush_domains, reloc_index; |
ac94a962 | 3297 | int pin_tries; |
673a394b EA |
3298 | |
3299 | #if WATCH_EXEC | |
3300 | DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n", | |
3301 | (int) args->buffers_ptr, args->buffer_count, args->batch_len); | |
3302 | #endif | |
3303 | ||
4f481ed2 EA |
3304 | if (args->buffer_count < 1) { |
3305 | DRM_ERROR("execbuf with %d buffers\n", args->buffer_count); | |
3306 | return -EINVAL; | |
3307 | } | |
673a394b | 3308 | /* Copy in the exec list from userland */ |
8e7d2b2c JB |
3309 | exec_list = drm_calloc_large(sizeof(*exec_list), args->buffer_count); |
3310 | object_list = drm_calloc_large(sizeof(*object_list), args->buffer_count); | |
673a394b EA |
3311 | if (exec_list == NULL || object_list == NULL) { |
3312 | DRM_ERROR("Failed to allocate exec or object list " | |
3313 | "for %d buffers\n", | |
3314 | args->buffer_count); | |
3315 | ret = -ENOMEM; | |
3316 | goto pre_mutex_err; | |
3317 | } | |
3318 | ret = copy_from_user(exec_list, | |
3319 | (struct drm_i915_relocation_entry __user *) | |
3320 | (uintptr_t) args->buffers_ptr, | |
3321 | sizeof(*exec_list) * args->buffer_count); | |
3322 | if (ret != 0) { | |
3323 | DRM_ERROR("copy %d exec entries failed %d\n", | |
3324 | args->buffer_count, ret); | |
3325 | goto pre_mutex_err; | |
3326 | } | |
3327 | ||
201361a5 | 3328 | if (args->num_cliprects != 0) { |
9a298b2a EA |
3329 | cliprects = kcalloc(args->num_cliprects, sizeof(*cliprects), |
3330 | GFP_KERNEL); | |
201361a5 EA |
3331 | if (cliprects == NULL) |
3332 | goto pre_mutex_err; | |
3333 | ||
3334 | ret = copy_from_user(cliprects, | |
3335 | (struct drm_clip_rect __user *) | |
3336 | (uintptr_t) args->cliprects_ptr, | |
3337 | sizeof(*cliprects) * args->num_cliprects); | |
3338 | if (ret != 0) { | |
3339 | DRM_ERROR("copy %d cliprects failed: %d\n", | |
3340 | args->num_cliprects, ret); | |
3341 | goto pre_mutex_err; | |
3342 | } | |
3343 | } | |
3344 | ||
40a5f0de EA |
3345 | ret = i915_gem_get_relocs_from_user(exec_list, args->buffer_count, |
3346 | &relocs); | |
3347 | if (ret != 0) | |
3348 | goto pre_mutex_err; | |
3349 | ||
673a394b EA |
3350 | mutex_lock(&dev->struct_mutex); |
3351 | ||
3352 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3353 | ||
ba1234d1 | 3354 | if (atomic_read(&dev_priv->mm.wedged)) { |
673a394b EA |
3355 | DRM_ERROR("Execbuf while wedged\n"); |
3356 | mutex_unlock(&dev->struct_mutex); | |
a198bc80 CW |
3357 | ret = -EIO; |
3358 | goto pre_mutex_err; | |
673a394b EA |
3359 | } |
3360 | ||
3361 | if (dev_priv->mm.suspended) { | |
3362 | DRM_ERROR("Execbuf while VT-switched.\n"); | |
3363 | mutex_unlock(&dev->struct_mutex); | |
a198bc80 CW |
3364 | ret = -EBUSY; |
3365 | goto pre_mutex_err; | |
673a394b EA |
3366 | } |
3367 | ||
ac94a962 | 3368 | /* Look up object handles */ |
673a394b EA |
3369 | for (i = 0; i < args->buffer_count; i++) { |
3370 | object_list[i] = drm_gem_object_lookup(dev, file_priv, | |
3371 | exec_list[i].handle); | |
3372 | if (object_list[i] == NULL) { | |
3373 | DRM_ERROR("Invalid object handle %d at index %d\n", | |
3374 | exec_list[i].handle, i); | |
3375 | ret = -EBADF; | |
3376 | goto err; | |
3377 | } | |
b70d11da KH |
3378 | |
3379 | obj_priv = object_list[i]->driver_private; | |
3380 | if (obj_priv->in_execbuffer) { | |
3381 | DRM_ERROR("Object %p appears more than once in object list\n", | |
3382 | object_list[i]); | |
3383 | ret = -EBADF; | |
3384 | goto err; | |
3385 | } | |
3386 | obj_priv->in_execbuffer = true; | |
ac94a962 | 3387 | } |
673a394b | 3388 | |
ac94a962 KP |
3389 | /* Pin and relocate */ |
3390 | for (pin_tries = 0; ; pin_tries++) { | |
3391 | ret = 0; | |
40a5f0de EA |
3392 | reloc_index = 0; |
3393 | ||
ac94a962 KP |
3394 | for (i = 0; i < args->buffer_count; i++) { |
3395 | object_list[i]->pending_read_domains = 0; | |
3396 | object_list[i]->pending_write_domain = 0; | |
3397 | ret = i915_gem_object_pin_and_relocate(object_list[i], | |
3398 | file_priv, | |
40a5f0de EA |
3399 | &exec_list[i], |
3400 | &relocs[reloc_index]); | |
ac94a962 KP |
3401 | if (ret) |
3402 | break; | |
3403 | pinned = i + 1; | |
40a5f0de | 3404 | reloc_index += exec_list[i].relocation_count; |
ac94a962 KP |
3405 | } |
3406 | /* success */ | |
3407 | if (ret == 0) | |
3408 | break; | |
3409 | ||
3410 | /* error other than GTT full, or we've already tried again */ | |
2939e1f5 | 3411 | if (ret != -ENOSPC || pin_tries >= 1) { |
f1acec93 EA |
3412 | if (ret != -ERESTARTSYS) |
3413 | DRM_ERROR("Failed to pin buffers %d\n", ret); | |
673a394b EA |
3414 | goto err; |
3415 | } | |
ac94a962 KP |
3416 | |
3417 | /* unpin all of our buffers */ | |
3418 | for (i = 0; i < pinned; i++) | |
3419 | i915_gem_object_unpin(object_list[i]); | |
b1177636 | 3420 | pinned = 0; |
ac94a962 KP |
3421 | |
3422 | /* evict everyone we can from the aperture */ | |
3423 | ret = i915_gem_evict_everything(dev); | |
3424 | if (ret) | |
3425 | goto err; | |
673a394b EA |
3426 | } |
3427 | ||
3428 | /* Set the pending read domains for the batch buffer to COMMAND */ | |
3429 | batch_obj = object_list[args->buffer_count-1]; | |
5f26a2c7 CW |
3430 | if (batch_obj->pending_write_domain) { |
3431 | DRM_ERROR("Attempting to use self-modifying batch buffer\n"); | |
3432 | ret = -EINVAL; | |
3433 | goto err; | |
3434 | } | |
3435 | batch_obj->pending_read_domains |= I915_GEM_DOMAIN_COMMAND; | |
673a394b | 3436 | |
83d60795 CW |
3437 | /* Sanity check the batch buffer, prior to moving objects */ |
3438 | exec_offset = exec_list[args->buffer_count - 1].offset; | |
3439 | ret = i915_gem_check_execbuffer (args, exec_offset); | |
3440 | if (ret != 0) { | |
3441 | DRM_ERROR("execbuf with invalid offset/length\n"); | |
3442 | goto err; | |
3443 | } | |
3444 | ||
673a394b EA |
3445 | i915_verify_inactive(dev, __FILE__, __LINE__); |
3446 | ||
646f0f6e KP |
3447 | /* Zero the global flush/invalidate flags. These |
3448 | * will be modified as new domains are computed | |
3449 | * for each object | |
3450 | */ | |
3451 | dev->invalidate_domains = 0; | |
3452 | dev->flush_domains = 0; | |
3453 | ||
673a394b EA |
3454 | for (i = 0; i < args->buffer_count; i++) { |
3455 | struct drm_gem_object *obj = object_list[i]; | |
673a394b | 3456 | |
646f0f6e | 3457 | /* Compute new gpu domains and update invalidate/flush */ |
8b0e378a | 3458 | i915_gem_object_set_to_gpu_domain(obj); |
673a394b EA |
3459 | } |
3460 | ||
3461 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3462 | ||
646f0f6e KP |
3463 | if (dev->invalidate_domains | dev->flush_domains) { |
3464 | #if WATCH_EXEC | |
3465 | DRM_INFO("%s: invalidate_domains %08x flush_domains %08x\n", | |
3466 | __func__, | |
3467 | dev->invalidate_domains, | |
3468 | dev->flush_domains); | |
3469 | #endif | |
3470 | i915_gem_flush(dev, | |
3471 | dev->invalidate_domains, | |
3472 | dev->flush_domains); | |
3473 | if (dev->flush_domains) | |
b962442e EA |
3474 | (void)i915_add_request(dev, file_priv, |
3475 | dev->flush_domains); | |
646f0f6e | 3476 | } |
673a394b | 3477 | |
efbeed96 EA |
3478 | for (i = 0; i < args->buffer_count; i++) { |
3479 | struct drm_gem_object *obj = object_list[i]; | |
3480 | ||
3481 | obj->write_domain = obj->pending_write_domain; | |
3482 | } | |
3483 | ||
673a394b EA |
3484 | i915_verify_inactive(dev, __FILE__, __LINE__); |
3485 | ||
3486 | #if WATCH_COHERENCY | |
3487 | for (i = 0; i < args->buffer_count; i++) { | |
3488 | i915_gem_object_check_coherency(object_list[i], | |
3489 | exec_list[i].handle); | |
3490 | } | |
3491 | #endif | |
3492 | ||
673a394b | 3493 | #if WATCH_EXEC |
6911a9b8 | 3494 | i915_gem_dump_object(batch_obj, |
673a394b EA |
3495 | args->batch_len, |
3496 | __func__, | |
3497 | ~0); | |
3498 | #endif | |
3499 | ||
673a394b | 3500 | /* Exec the batchbuffer */ |
201361a5 | 3501 | ret = i915_dispatch_gem_execbuffer(dev, args, cliprects, exec_offset); |
673a394b EA |
3502 | if (ret) { |
3503 | DRM_ERROR("dispatch failed %d\n", ret); | |
3504 | goto err; | |
3505 | } | |
3506 | ||
3507 | /* | |
3508 | * Ensure that the commands in the batch buffer are | |
3509 | * finished before the interrupt fires | |
3510 | */ | |
3511 | flush_domains = i915_retire_commands(dev); | |
3512 | ||
3513 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3514 | ||
3515 | /* | |
3516 | * Get a seqno representing the execution of the current buffer, | |
3517 | * which we can wait on. We would like to mitigate these interrupts, | |
3518 | * likely by only creating seqnos occasionally (so that we have | |
3519 | * *some* interrupts representing completion of buffers that we can | |
3520 | * wait on when trying to clear up gtt space). | |
3521 | */ | |
b962442e | 3522 | seqno = i915_add_request(dev, file_priv, flush_domains); |
673a394b | 3523 | BUG_ON(seqno == 0); |
673a394b EA |
3524 | for (i = 0; i < args->buffer_count; i++) { |
3525 | struct drm_gem_object *obj = object_list[i]; | |
673a394b | 3526 | |
ce44b0ea | 3527 | i915_gem_object_move_to_active(obj, seqno); |
673a394b EA |
3528 | #if WATCH_LRU |
3529 | DRM_INFO("%s: move to exec list %p\n", __func__, obj); | |
3530 | #endif | |
3531 | } | |
3532 | #if WATCH_LRU | |
3533 | i915_dump_lru(dev, __func__); | |
3534 | #endif | |
3535 | ||
3536 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3537 | ||
673a394b | 3538 | err: |
aad87dff JL |
3539 | for (i = 0; i < pinned; i++) |
3540 | i915_gem_object_unpin(object_list[i]); | |
3541 | ||
b70d11da KH |
3542 | for (i = 0; i < args->buffer_count; i++) { |
3543 | if (object_list[i]) { | |
3544 | obj_priv = object_list[i]->driver_private; | |
3545 | obj_priv->in_execbuffer = false; | |
3546 | } | |
aad87dff | 3547 | drm_gem_object_unreference(object_list[i]); |
b70d11da | 3548 | } |
673a394b | 3549 | |
673a394b EA |
3550 | mutex_unlock(&dev->struct_mutex); |
3551 | ||
a35f2e2b RD |
3552 | if (!ret) { |
3553 | /* Copy the new buffer offsets back to the user's exec list. */ | |
3554 | ret = copy_to_user((struct drm_i915_relocation_entry __user *) | |
3555 | (uintptr_t) args->buffers_ptr, | |
3556 | exec_list, | |
3557 | sizeof(*exec_list) * args->buffer_count); | |
2bc43b5c FM |
3558 | if (ret) { |
3559 | ret = -EFAULT; | |
a35f2e2b RD |
3560 | DRM_ERROR("failed to copy %d exec entries " |
3561 | "back to user (%d)\n", | |
3562 | args->buffer_count, ret); | |
2bc43b5c | 3563 | } |
a35f2e2b RD |
3564 | } |
3565 | ||
40a5f0de EA |
3566 | /* Copy the updated relocations out regardless of current error |
3567 | * state. Failure to update the relocs would mean that the next | |
3568 | * time userland calls execbuf, it would do so with presumed offset | |
3569 | * state that didn't match the actual object state. | |
3570 | */ | |
3571 | ret2 = i915_gem_put_relocs_to_user(exec_list, args->buffer_count, | |
3572 | relocs); | |
3573 | if (ret2 != 0) { | |
3574 | DRM_ERROR("Failed to copy relocations back out: %d\n", ret2); | |
3575 | ||
3576 | if (ret == 0) | |
3577 | ret = ret2; | |
3578 | } | |
3579 | ||
673a394b | 3580 | pre_mutex_err: |
8e7d2b2c JB |
3581 | drm_free_large(object_list); |
3582 | drm_free_large(exec_list); | |
9a298b2a | 3583 | kfree(cliprects); |
673a394b EA |
3584 | |
3585 | return ret; | |
3586 | } | |
3587 | ||
3588 | int | |
3589 | i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment) | |
3590 | { | |
3591 | struct drm_device *dev = obj->dev; | |
3592 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
3593 | int ret; | |
3594 | ||
3595 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3596 | if (obj_priv->gtt_space == NULL) { | |
3597 | ret = i915_gem_object_bind_to_gtt(obj, alignment); | |
3598 | if (ret != 0) { | |
9bb2d6f9 | 3599 | if (ret != -EBUSY && ret != -ERESTARTSYS) |
0fce81e3 | 3600 | DRM_ERROR("Failure to bind: %d\n", ret); |
673a394b EA |
3601 | return ret; |
3602 | } | |
22c344e9 CW |
3603 | } |
3604 | /* | |
3605 | * Pre-965 chips need a fence register set up in order to | |
3606 | * properly handle tiled surfaces. | |
3607 | */ | |
a09ba7fa | 3608 | if (!IS_I965G(dev) && obj_priv->tiling_mode != I915_TILING_NONE) { |
8c4b8c3f | 3609 | ret = i915_gem_object_get_fence_reg(obj); |
22c344e9 CW |
3610 | if (ret != 0) { |
3611 | if (ret != -EBUSY && ret != -ERESTARTSYS) | |
3612 | DRM_ERROR("Failure to install fence: %d\n", | |
3613 | ret); | |
3614 | return ret; | |
3615 | } | |
673a394b EA |
3616 | } |
3617 | obj_priv->pin_count++; | |
3618 | ||
3619 | /* If the object is not active and not pending a flush, | |
3620 | * remove it from the inactive list | |
3621 | */ | |
3622 | if (obj_priv->pin_count == 1) { | |
3623 | atomic_inc(&dev->pin_count); | |
3624 | atomic_add(obj->size, &dev->pin_memory); | |
3625 | if (!obj_priv->active && | |
21d509e3 | 3626 | (obj->write_domain & I915_GEM_GPU_DOMAINS) == 0 && |
673a394b EA |
3627 | !list_empty(&obj_priv->list)) |
3628 | list_del_init(&obj_priv->list); | |
3629 | } | |
3630 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3631 | ||
3632 | return 0; | |
3633 | } | |
3634 | ||
3635 | void | |
3636 | i915_gem_object_unpin(struct drm_gem_object *obj) | |
3637 | { | |
3638 | struct drm_device *dev = obj->dev; | |
3639 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3640 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
3641 | ||
3642 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3643 | obj_priv->pin_count--; | |
3644 | BUG_ON(obj_priv->pin_count < 0); | |
3645 | BUG_ON(obj_priv->gtt_space == NULL); | |
3646 | ||
3647 | /* If the object is no longer pinned, and is | |
3648 | * neither active nor being flushed, then stick it on | |
3649 | * the inactive list | |
3650 | */ | |
3651 | if (obj_priv->pin_count == 0) { | |
3652 | if (!obj_priv->active && | |
21d509e3 | 3653 | (obj->write_domain & I915_GEM_GPU_DOMAINS) == 0) |
673a394b EA |
3654 | list_move_tail(&obj_priv->list, |
3655 | &dev_priv->mm.inactive_list); | |
3656 | atomic_dec(&dev->pin_count); | |
3657 | atomic_sub(obj->size, &dev->pin_memory); | |
3658 | } | |
3659 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3660 | } | |
3661 | ||
3662 | int | |
3663 | i915_gem_pin_ioctl(struct drm_device *dev, void *data, | |
3664 | struct drm_file *file_priv) | |
3665 | { | |
3666 | struct drm_i915_gem_pin *args = data; | |
3667 | struct drm_gem_object *obj; | |
3668 | struct drm_i915_gem_object *obj_priv; | |
3669 | int ret; | |
3670 | ||
3671 | mutex_lock(&dev->struct_mutex); | |
3672 | ||
3673 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
3674 | if (obj == NULL) { | |
3675 | DRM_ERROR("Bad handle in i915_gem_pin_ioctl(): %d\n", | |
3676 | args->handle); | |
3677 | mutex_unlock(&dev->struct_mutex); | |
3678 | return -EBADF; | |
3679 | } | |
3680 | obj_priv = obj->driver_private; | |
3681 | ||
79e53945 JB |
3682 | if (obj_priv->pin_filp != NULL && obj_priv->pin_filp != file_priv) { |
3683 | DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n", | |
3684 | args->handle); | |
96dec61d | 3685 | drm_gem_object_unreference(obj); |
673a394b | 3686 | mutex_unlock(&dev->struct_mutex); |
79e53945 JB |
3687 | return -EINVAL; |
3688 | } | |
3689 | ||
3690 | obj_priv->user_pin_count++; | |
3691 | obj_priv->pin_filp = file_priv; | |
3692 | if (obj_priv->user_pin_count == 1) { | |
3693 | ret = i915_gem_object_pin(obj, args->alignment); | |
3694 | if (ret != 0) { | |
3695 | drm_gem_object_unreference(obj); | |
3696 | mutex_unlock(&dev->struct_mutex); | |
3697 | return ret; | |
3698 | } | |
673a394b EA |
3699 | } |
3700 | ||
3701 | /* XXX - flush the CPU caches for pinned objects | |
3702 | * as the X server doesn't manage domains yet | |
3703 | */ | |
e47c68e9 | 3704 | i915_gem_object_flush_cpu_write_domain(obj); |
673a394b EA |
3705 | args->offset = obj_priv->gtt_offset; |
3706 | drm_gem_object_unreference(obj); | |
3707 | mutex_unlock(&dev->struct_mutex); | |
3708 | ||
3709 | return 0; | |
3710 | } | |
3711 | ||
3712 | int | |
3713 | i915_gem_unpin_ioctl(struct drm_device *dev, void *data, | |
3714 | struct drm_file *file_priv) | |
3715 | { | |
3716 | struct drm_i915_gem_pin *args = data; | |
3717 | struct drm_gem_object *obj; | |
79e53945 | 3718 | struct drm_i915_gem_object *obj_priv; |
673a394b EA |
3719 | |
3720 | mutex_lock(&dev->struct_mutex); | |
3721 | ||
3722 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
3723 | if (obj == NULL) { | |
3724 | DRM_ERROR("Bad handle in i915_gem_unpin_ioctl(): %d\n", | |
3725 | args->handle); | |
3726 | mutex_unlock(&dev->struct_mutex); | |
3727 | return -EBADF; | |
3728 | } | |
3729 | ||
79e53945 JB |
3730 | obj_priv = obj->driver_private; |
3731 | if (obj_priv->pin_filp != file_priv) { | |
3732 | DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n", | |
3733 | args->handle); | |
3734 | drm_gem_object_unreference(obj); | |
3735 | mutex_unlock(&dev->struct_mutex); | |
3736 | return -EINVAL; | |
3737 | } | |
3738 | obj_priv->user_pin_count--; | |
3739 | if (obj_priv->user_pin_count == 0) { | |
3740 | obj_priv->pin_filp = NULL; | |
3741 | i915_gem_object_unpin(obj); | |
3742 | } | |
673a394b EA |
3743 | |
3744 | drm_gem_object_unreference(obj); | |
3745 | mutex_unlock(&dev->struct_mutex); | |
3746 | return 0; | |
3747 | } | |
3748 | ||
3749 | int | |
3750 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, | |
3751 | struct drm_file *file_priv) | |
3752 | { | |
3753 | struct drm_i915_gem_busy *args = data; | |
3754 | struct drm_gem_object *obj; | |
3755 | struct drm_i915_gem_object *obj_priv; | |
3756 | ||
673a394b EA |
3757 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
3758 | if (obj == NULL) { | |
3759 | DRM_ERROR("Bad handle in i915_gem_busy_ioctl(): %d\n", | |
3760 | args->handle); | |
673a394b EA |
3761 | return -EBADF; |
3762 | } | |
3763 | ||
b1ce786c | 3764 | mutex_lock(&dev->struct_mutex); |
f21289b3 EA |
3765 | /* Update the active list for the hardware's current position. |
3766 | * Otherwise this only updates on a delayed timer or when irqs are | |
3767 | * actually unmasked, and our working set ends up being larger than | |
3768 | * required. | |
3769 | */ | |
3770 | i915_gem_retire_requests(dev); | |
3771 | ||
673a394b | 3772 | obj_priv = obj->driver_private; |
c4de0a5d EA |
3773 | /* Don't count being on the flushing list against the object being |
3774 | * done. Otherwise, a buffer left on the flushing list but not getting | |
3775 | * flushed (because nobody's flushing that domain) won't ever return | |
3776 | * unbusy and get reused by libdrm's bo cache. The other expected | |
3777 | * consumer of this interface, OpenGL's occlusion queries, also specs | |
3778 | * that the objects get unbusy "eventually" without any interference. | |
3779 | */ | |
3780 | args->busy = obj_priv->active && obj_priv->last_rendering_seqno != 0; | |
673a394b EA |
3781 | |
3782 | drm_gem_object_unreference(obj); | |
3783 | mutex_unlock(&dev->struct_mutex); | |
3784 | return 0; | |
3785 | } | |
3786 | ||
3787 | int | |
3788 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, | |
3789 | struct drm_file *file_priv) | |
3790 | { | |
3791 | return i915_gem_ring_throttle(dev, file_priv); | |
3792 | } | |
3793 | ||
3794 | int i915_gem_init_object(struct drm_gem_object *obj) | |
3795 | { | |
3796 | struct drm_i915_gem_object *obj_priv; | |
3797 | ||
9a298b2a | 3798 | obj_priv = kzalloc(sizeof(*obj_priv), GFP_KERNEL); |
673a394b EA |
3799 | if (obj_priv == NULL) |
3800 | return -ENOMEM; | |
3801 | ||
3802 | /* | |
3803 | * We've just allocated pages from the kernel, | |
3804 | * so they've just been written by the CPU with | |
3805 | * zeros. They'll need to be clflushed before we | |
3806 | * use them with the GPU. | |
3807 | */ | |
3808 | obj->write_domain = I915_GEM_DOMAIN_CPU; | |
3809 | obj->read_domains = I915_GEM_DOMAIN_CPU; | |
3810 | ||
ba1eb1d8 KP |
3811 | obj_priv->agp_type = AGP_USER_MEMORY; |
3812 | ||
673a394b EA |
3813 | obj->driver_private = obj_priv; |
3814 | obj_priv->obj = obj; | |
de151cf6 | 3815 | obj_priv->fence_reg = I915_FENCE_REG_NONE; |
673a394b | 3816 | INIT_LIST_HEAD(&obj_priv->list); |
a09ba7fa | 3817 | INIT_LIST_HEAD(&obj_priv->fence_list); |
de151cf6 | 3818 | |
673a394b EA |
3819 | return 0; |
3820 | } | |
3821 | ||
3822 | void i915_gem_free_object(struct drm_gem_object *obj) | |
3823 | { | |
de151cf6 | 3824 | struct drm_device *dev = obj->dev; |
673a394b EA |
3825 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
3826 | ||
3827 | while (obj_priv->pin_count > 0) | |
3828 | i915_gem_object_unpin(obj); | |
3829 | ||
71acb5eb DA |
3830 | if (obj_priv->phys_obj) |
3831 | i915_gem_detach_phys_object(dev, obj); | |
3832 | ||
673a394b EA |
3833 | i915_gem_object_unbind(obj); |
3834 | ||
7e616158 CW |
3835 | if (obj_priv->mmap_offset) |
3836 | i915_gem_free_mmap_offset(obj); | |
de151cf6 | 3837 | |
9a298b2a | 3838 | kfree(obj_priv->page_cpu_valid); |
280b713b | 3839 | kfree(obj_priv->bit_17); |
9a298b2a | 3840 | kfree(obj->driver_private); |
673a394b EA |
3841 | } |
3842 | ||
673a394b EA |
3843 | /** Unbinds all objects that are on the given buffer list. */ |
3844 | static int | |
3845 | i915_gem_evict_from_list(struct drm_device *dev, struct list_head *head) | |
3846 | { | |
3847 | struct drm_gem_object *obj; | |
3848 | struct drm_i915_gem_object *obj_priv; | |
3849 | int ret; | |
3850 | ||
3851 | while (!list_empty(head)) { | |
3852 | obj_priv = list_first_entry(head, | |
3853 | struct drm_i915_gem_object, | |
3854 | list); | |
3855 | obj = obj_priv->obj; | |
3856 | ||
3857 | if (obj_priv->pin_count != 0) { | |
3858 | DRM_ERROR("Pinned object in unbind list\n"); | |
3859 | mutex_unlock(&dev->struct_mutex); | |
3860 | return -EINVAL; | |
3861 | } | |
3862 | ||
3863 | ret = i915_gem_object_unbind(obj); | |
3864 | if (ret != 0) { | |
3865 | DRM_ERROR("Error unbinding object in LeaveVT: %d\n", | |
3866 | ret); | |
3867 | mutex_unlock(&dev->struct_mutex); | |
3868 | return ret; | |
3869 | } | |
3870 | } | |
3871 | ||
3872 | ||
3873 | return 0; | |
3874 | } | |
3875 | ||
5669fcac | 3876 | int |
673a394b EA |
3877 | i915_gem_idle(struct drm_device *dev) |
3878 | { | |
3879 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3880 | uint32_t seqno, cur_seqno, last_seqno; | |
3881 | int stuck, ret; | |
3882 | ||
6dbe2772 KP |
3883 | mutex_lock(&dev->struct_mutex); |
3884 | ||
3885 | if (dev_priv->mm.suspended || dev_priv->ring.ring_obj == NULL) { | |
3886 | mutex_unlock(&dev->struct_mutex); | |
673a394b | 3887 | return 0; |
6dbe2772 | 3888 | } |
673a394b EA |
3889 | |
3890 | /* Hack! Don't let anybody do execbuf while we don't control the chip. | |
3891 | * We need to replace this with a semaphore, or something. | |
3892 | */ | |
3893 | dev_priv->mm.suspended = 1; | |
f65d9421 | 3894 | del_timer(&dev_priv->hangcheck_timer); |
673a394b | 3895 | |
6dbe2772 KP |
3896 | /* Cancel the retire work handler, wait for it to finish if running |
3897 | */ | |
3898 | mutex_unlock(&dev->struct_mutex); | |
3899 | cancel_delayed_work_sync(&dev_priv->mm.retire_work); | |
3900 | mutex_lock(&dev->struct_mutex); | |
3901 | ||
673a394b EA |
3902 | i915_kernel_lost_context(dev); |
3903 | ||
3904 | /* Flush the GPU along with all non-CPU write domains | |
3905 | */ | |
21d509e3 CW |
3906 | i915_gem_flush(dev, I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS); |
3907 | seqno = i915_add_request(dev, NULL, I915_GEM_GPU_DOMAINS); | |
673a394b EA |
3908 | |
3909 | if (seqno == 0) { | |
3910 | mutex_unlock(&dev->struct_mutex); | |
3911 | return -ENOMEM; | |
3912 | } | |
3913 | ||
3914 | dev_priv->mm.waiting_gem_seqno = seqno; | |
3915 | last_seqno = 0; | |
3916 | stuck = 0; | |
3917 | for (;;) { | |
3918 | cur_seqno = i915_get_gem_seqno(dev); | |
3919 | if (i915_seqno_passed(cur_seqno, seqno)) | |
3920 | break; | |
3921 | if (last_seqno == cur_seqno) { | |
3922 | if (stuck++ > 100) { | |
3923 | DRM_ERROR("hardware wedged\n"); | |
ba1234d1 | 3924 | atomic_set(&dev_priv->mm.wedged, 1); |
673a394b EA |
3925 | DRM_WAKEUP(&dev_priv->irq_queue); |
3926 | break; | |
3927 | } | |
3928 | } | |
3929 | msleep(10); | |
3930 | last_seqno = cur_seqno; | |
3931 | } | |
3932 | dev_priv->mm.waiting_gem_seqno = 0; | |
3933 | ||
3934 | i915_gem_retire_requests(dev); | |
3935 | ||
5e118f41 | 3936 | spin_lock(&dev_priv->mm.active_list_lock); |
ba1234d1 | 3937 | if (!atomic_read(&dev_priv->mm.wedged)) { |
28dfe52a EA |
3938 | /* Active and flushing should now be empty as we've |
3939 | * waited for a sequence higher than any pending execbuffer | |
3940 | */ | |
3941 | WARN_ON(!list_empty(&dev_priv->mm.active_list)); | |
3942 | WARN_ON(!list_empty(&dev_priv->mm.flushing_list)); | |
3943 | /* Request should now be empty as we've also waited | |
3944 | * for the last request in the list | |
3945 | */ | |
3946 | WARN_ON(!list_empty(&dev_priv->mm.request_list)); | |
3947 | } | |
673a394b | 3948 | |
28dfe52a EA |
3949 | /* Empty the active and flushing lists to inactive. If there's |
3950 | * anything left at this point, it means that we're wedged and | |
3951 | * nothing good's going to happen by leaving them there. So strip | |
3952 | * the GPU domains and just stuff them onto inactive. | |
673a394b | 3953 | */ |
28dfe52a EA |
3954 | while (!list_empty(&dev_priv->mm.active_list)) { |
3955 | struct drm_i915_gem_object *obj_priv; | |
673a394b | 3956 | |
28dfe52a EA |
3957 | obj_priv = list_first_entry(&dev_priv->mm.active_list, |
3958 | struct drm_i915_gem_object, | |
3959 | list); | |
3960 | obj_priv->obj->write_domain &= ~I915_GEM_GPU_DOMAINS; | |
3961 | i915_gem_object_move_to_inactive(obj_priv->obj); | |
3962 | } | |
5e118f41 | 3963 | spin_unlock(&dev_priv->mm.active_list_lock); |
28dfe52a EA |
3964 | |
3965 | while (!list_empty(&dev_priv->mm.flushing_list)) { | |
3966 | struct drm_i915_gem_object *obj_priv; | |
3967 | ||
151903d5 | 3968 | obj_priv = list_first_entry(&dev_priv->mm.flushing_list, |
28dfe52a EA |
3969 | struct drm_i915_gem_object, |
3970 | list); | |
3971 | obj_priv->obj->write_domain &= ~I915_GEM_GPU_DOMAINS; | |
3972 | i915_gem_object_move_to_inactive(obj_priv->obj); | |
3973 | } | |
3974 | ||
3975 | ||
3976 | /* Move all inactive buffers out of the GTT. */ | |
673a394b | 3977 | ret = i915_gem_evict_from_list(dev, &dev_priv->mm.inactive_list); |
28dfe52a | 3978 | WARN_ON(!list_empty(&dev_priv->mm.inactive_list)); |
6dbe2772 KP |
3979 | if (ret) { |
3980 | mutex_unlock(&dev->struct_mutex); | |
673a394b | 3981 | return ret; |
6dbe2772 | 3982 | } |
673a394b | 3983 | |
6dbe2772 KP |
3984 | i915_gem_cleanup_ringbuffer(dev); |
3985 | mutex_unlock(&dev->struct_mutex); | |
3986 | ||
673a394b EA |
3987 | return 0; |
3988 | } | |
3989 | ||
3990 | static int | |
3991 | i915_gem_init_hws(struct drm_device *dev) | |
3992 | { | |
3993 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3994 | struct drm_gem_object *obj; | |
3995 | struct drm_i915_gem_object *obj_priv; | |
3996 | int ret; | |
3997 | ||
3998 | /* If we need a physical address for the status page, it's already | |
3999 | * initialized at driver load time. | |
4000 | */ | |
4001 | if (!I915_NEED_GFX_HWS(dev)) | |
4002 | return 0; | |
4003 | ||
4004 | obj = drm_gem_object_alloc(dev, 4096); | |
4005 | if (obj == NULL) { | |
4006 | DRM_ERROR("Failed to allocate status page\n"); | |
4007 | return -ENOMEM; | |
4008 | } | |
4009 | obj_priv = obj->driver_private; | |
ba1eb1d8 | 4010 | obj_priv->agp_type = AGP_USER_CACHED_MEMORY; |
673a394b EA |
4011 | |
4012 | ret = i915_gem_object_pin(obj, 4096); | |
4013 | if (ret != 0) { | |
4014 | drm_gem_object_unreference(obj); | |
4015 | return ret; | |
4016 | } | |
4017 | ||
4018 | dev_priv->status_gfx_addr = obj_priv->gtt_offset; | |
673a394b | 4019 | |
856fa198 | 4020 | dev_priv->hw_status_page = kmap(obj_priv->pages[0]); |
ba1eb1d8 | 4021 | if (dev_priv->hw_status_page == NULL) { |
673a394b EA |
4022 | DRM_ERROR("Failed to map status page.\n"); |
4023 | memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); | |
3eb2ee77 | 4024 | i915_gem_object_unpin(obj); |
673a394b EA |
4025 | drm_gem_object_unreference(obj); |
4026 | return -EINVAL; | |
4027 | } | |
4028 | dev_priv->hws_obj = obj; | |
673a394b EA |
4029 | memset(dev_priv->hw_status_page, 0, PAGE_SIZE); |
4030 | I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr); | |
ba1eb1d8 | 4031 | I915_READ(HWS_PGA); /* posting read */ |
673a394b EA |
4032 | DRM_DEBUG("hws offset: 0x%08x\n", dev_priv->status_gfx_addr); |
4033 | ||
4034 | return 0; | |
4035 | } | |
4036 | ||
85a7bb98 CW |
4037 | static void |
4038 | i915_gem_cleanup_hws(struct drm_device *dev) | |
4039 | { | |
4040 | drm_i915_private_t *dev_priv = dev->dev_private; | |
bab2d1f6 CW |
4041 | struct drm_gem_object *obj; |
4042 | struct drm_i915_gem_object *obj_priv; | |
85a7bb98 CW |
4043 | |
4044 | if (dev_priv->hws_obj == NULL) | |
4045 | return; | |
4046 | ||
bab2d1f6 CW |
4047 | obj = dev_priv->hws_obj; |
4048 | obj_priv = obj->driver_private; | |
4049 | ||
856fa198 | 4050 | kunmap(obj_priv->pages[0]); |
85a7bb98 CW |
4051 | i915_gem_object_unpin(obj); |
4052 | drm_gem_object_unreference(obj); | |
4053 | dev_priv->hws_obj = NULL; | |
bab2d1f6 | 4054 | |
85a7bb98 CW |
4055 | memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); |
4056 | dev_priv->hw_status_page = NULL; | |
4057 | ||
4058 | /* Write high address into HWS_PGA when disabling. */ | |
4059 | I915_WRITE(HWS_PGA, 0x1ffff000); | |
4060 | } | |
4061 | ||
79e53945 | 4062 | int |
673a394b EA |
4063 | i915_gem_init_ringbuffer(struct drm_device *dev) |
4064 | { | |
4065 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4066 | struct drm_gem_object *obj; | |
4067 | struct drm_i915_gem_object *obj_priv; | |
79e53945 | 4068 | drm_i915_ring_buffer_t *ring = &dev_priv->ring; |
673a394b | 4069 | int ret; |
50aa253d | 4070 | u32 head; |
673a394b EA |
4071 | |
4072 | ret = i915_gem_init_hws(dev); | |
4073 | if (ret != 0) | |
4074 | return ret; | |
4075 | ||
4076 | obj = drm_gem_object_alloc(dev, 128 * 1024); | |
4077 | if (obj == NULL) { | |
4078 | DRM_ERROR("Failed to allocate ringbuffer\n"); | |
85a7bb98 | 4079 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4080 | return -ENOMEM; |
4081 | } | |
4082 | obj_priv = obj->driver_private; | |
4083 | ||
4084 | ret = i915_gem_object_pin(obj, 4096); | |
4085 | if (ret != 0) { | |
4086 | drm_gem_object_unreference(obj); | |
85a7bb98 | 4087 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4088 | return ret; |
4089 | } | |
4090 | ||
4091 | /* Set up the kernel mapping for the ring. */ | |
79e53945 | 4092 | ring->Size = obj->size; |
673a394b | 4093 | |
79e53945 JB |
4094 | ring->map.offset = dev->agp->base + obj_priv->gtt_offset; |
4095 | ring->map.size = obj->size; | |
4096 | ring->map.type = 0; | |
4097 | ring->map.flags = 0; | |
4098 | ring->map.mtrr = 0; | |
673a394b | 4099 | |
79e53945 JB |
4100 | drm_core_ioremap_wc(&ring->map, dev); |
4101 | if (ring->map.handle == NULL) { | |
673a394b EA |
4102 | DRM_ERROR("Failed to map ringbuffer.\n"); |
4103 | memset(&dev_priv->ring, 0, sizeof(dev_priv->ring)); | |
47ed185a | 4104 | i915_gem_object_unpin(obj); |
673a394b | 4105 | drm_gem_object_unreference(obj); |
85a7bb98 | 4106 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4107 | return -EINVAL; |
4108 | } | |
79e53945 JB |
4109 | ring->ring_obj = obj; |
4110 | ring->virtual_start = ring->map.handle; | |
673a394b EA |
4111 | |
4112 | /* Stop the ring if it's running. */ | |
4113 | I915_WRITE(PRB0_CTL, 0); | |
673a394b | 4114 | I915_WRITE(PRB0_TAIL, 0); |
50aa253d | 4115 | I915_WRITE(PRB0_HEAD, 0); |
673a394b EA |
4116 | |
4117 | /* Initialize the ring. */ | |
4118 | I915_WRITE(PRB0_START, obj_priv->gtt_offset); | |
50aa253d KP |
4119 | head = I915_READ(PRB0_HEAD) & HEAD_ADDR; |
4120 | ||
4121 | /* G45 ring initialization fails to reset head to zero */ | |
4122 | if (head != 0) { | |
4123 | DRM_ERROR("Ring head not reset to zero " | |
4124 | "ctl %08x head %08x tail %08x start %08x\n", | |
4125 | I915_READ(PRB0_CTL), | |
4126 | I915_READ(PRB0_HEAD), | |
4127 | I915_READ(PRB0_TAIL), | |
4128 | I915_READ(PRB0_START)); | |
4129 | I915_WRITE(PRB0_HEAD, 0); | |
4130 | ||
4131 | DRM_ERROR("Ring head forced to zero " | |
4132 | "ctl %08x head %08x tail %08x start %08x\n", | |
4133 | I915_READ(PRB0_CTL), | |
4134 | I915_READ(PRB0_HEAD), | |
4135 | I915_READ(PRB0_TAIL), | |
4136 | I915_READ(PRB0_START)); | |
4137 | } | |
4138 | ||
673a394b EA |
4139 | I915_WRITE(PRB0_CTL, |
4140 | ((obj->size - 4096) & RING_NR_PAGES) | | |
4141 | RING_NO_REPORT | | |
4142 | RING_VALID); | |
4143 | ||
50aa253d KP |
4144 | head = I915_READ(PRB0_HEAD) & HEAD_ADDR; |
4145 | ||
4146 | /* If the head is still not zero, the ring is dead */ | |
4147 | if (head != 0) { | |
4148 | DRM_ERROR("Ring initialization failed " | |
4149 | "ctl %08x head %08x tail %08x start %08x\n", | |
4150 | I915_READ(PRB0_CTL), | |
4151 | I915_READ(PRB0_HEAD), | |
4152 | I915_READ(PRB0_TAIL), | |
4153 | I915_READ(PRB0_START)); | |
4154 | return -EIO; | |
4155 | } | |
4156 | ||
673a394b | 4157 | /* Update our cache of the ring state */ |
79e53945 JB |
4158 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
4159 | i915_kernel_lost_context(dev); | |
4160 | else { | |
4161 | ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR; | |
4162 | ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR; | |
4163 | ring->space = ring->head - (ring->tail + 8); | |
4164 | if (ring->space < 0) | |
4165 | ring->space += ring->Size; | |
4166 | } | |
673a394b EA |
4167 | |
4168 | return 0; | |
4169 | } | |
4170 | ||
79e53945 | 4171 | void |
673a394b EA |
4172 | i915_gem_cleanup_ringbuffer(struct drm_device *dev) |
4173 | { | |
4174 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4175 | ||
4176 | if (dev_priv->ring.ring_obj == NULL) | |
4177 | return; | |
4178 | ||
4179 | drm_core_ioremapfree(&dev_priv->ring.map, dev); | |
4180 | ||
4181 | i915_gem_object_unpin(dev_priv->ring.ring_obj); | |
4182 | drm_gem_object_unreference(dev_priv->ring.ring_obj); | |
4183 | dev_priv->ring.ring_obj = NULL; | |
4184 | memset(&dev_priv->ring, 0, sizeof(dev_priv->ring)); | |
4185 | ||
85a7bb98 | 4186 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4187 | } |
4188 | ||
4189 | int | |
4190 | i915_gem_entervt_ioctl(struct drm_device *dev, void *data, | |
4191 | struct drm_file *file_priv) | |
4192 | { | |
4193 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4194 | int ret; | |
4195 | ||
79e53945 JB |
4196 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4197 | return 0; | |
4198 | ||
ba1234d1 | 4199 | if (atomic_read(&dev_priv->mm.wedged)) { |
673a394b | 4200 | DRM_ERROR("Reenabling wedged hardware, good luck\n"); |
ba1234d1 | 4201 | atomic_set(&dev_priv->mm.wedged, 0); |
673a394b EA |
4202 | } |
4203 | ||
673a394b | 4204 | mutex_lock(&dev->struct_mutex); |
9bb2d6f9 EA |
4205 | dev_priv->mm.suspended = 0; |
4206 | ||
4207 | ret = i915_gem_init_ringbuffer(dev); | |
d816f6ac WF |
4208 | if (ret != 0) { |
4209 | mutex_unlock(&dev->struct_mutex); | |
9bb2d6f9 | 4210 | return ret; |
d816f6ac | 4211 | } |
9bb2d6f9 | 4212 | |
5e118f41 | 4213 | spin_lock(&dev_priv->mm.active_list_lock); |
673a394b | 4214 | BUG_ON(!list_empty(&dev_priv->mm.active_list)); |
5e118f41 CW |
4215 | spin_unlock(&dev_priv->mm.active_list_lock); |
4216 | ||
673a394b EA |
4217 | BUG_ON(!list_empty(&dev_priv->mm.flushing_list)); |
4218 | BUG_ON(!list_empty(&dev_priv->mm.inactive_list)); | |
4219 | BUG_ON(!list_empty(&dev_priv->mm.request_list)); | |
673a394b | 4220 | mutex_unlock(&dev->struct_mutex); |
dbb19d30 KH |
4221 | |
4222 | drm_irq_install(dev); | |
4223 | ||
673a394b EA |
4224 | return 0; |
4225 | } | |
4226 | ||
4227 | int | |
4228 | i915_gem_leavevt_ioctl(struct drm_device *dev, void *data, | |
4229 | struct drm_file *file_priv) | |
4230 | { | |
4231 | int ret; | |
4232 | ||
79e53945 JB |
4233 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4234 | return 0; | |
4235 | ||
673a394b | 4236 | ret = i915_gem_idle(dev); |
dbb19d30 KH |
4237 | drm_irq_uninstall(dev); |
4238 | ||
6dbe2772 | 4239 | return ret; |
673a394b EA |
4240 | } |
4241 | ||
4242 | void | |
4243 | i915_gem_lastclose(struct drm_device *dev) | |
4244 | { | |
4245 | int ret; | |
673a394b | 4246 | |
e806b495 EA |
4247 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4248 | return; | |
4249 | ||
6dbe2772 KP |
4250 | ret = i915_gem_idle(dev); |
4251 | if (ret) | |
4252 | DRM_ERROR("failed to idle hardware: %d\n", ret); | |
673a394b EA |
4253 | } |
4254 | ||
4255 | void | |
4256 | i915_gem_load(struct drm_device *dev) | |
4257 | { | |
b5aa8a0f | 4258 | int i; |
673a394b EA |
4259 | drm_i915_private_t *dev_priv = dev->dev_private; |
4260 | ||
5e118f41 | 4261 | spin_lock_init(&dev_priv->mm.active_list_lock); |
673a394b EA |
4262 | INIT_LIST_HEAD(&dev_priv->mm.active_list); |
4263 | INIT_LIST_HEAD(&dev_priv->mm.flushing_list); | |
4264 | INIT_LIST_HEAD(&dev_priv->mm.inactive_list); | |
4265 | INIT_LIST_HEAD(&dev_priv->mm.request_list); | |
a09ba7fa | 4266 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
673a394b EA |
4267 | INIT_DELAYED_WORK(&dev_priv->mm.retire_work, |
4268 | i915_gem_retire_work_handler); | |
4269 | dev_priv->mm.next_gem_seqno = 1; | |
4270 | ||
31169714 CW |
4271 | spin_lock(&shrink_list_lock); |
4272 | list_add(&dev_priv->mm.shrink_list, &shrink_list); | |
4273 | spin_unlock(&shrink_list_lock); | |
4274 | ||
de151cf6 JB |
4275 | /* Old X drivers will take 0-2 for front, back, depth buffers */ |
4276 | dev_priv->fence_reg_start = 3; | |
4277 | ||
0f973f27 | 4278 | if (IS_I965G(dev) || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) |
de151cf6 JB |
4279 | dev_priv->num_fence_regs = 16; |
4280 | else | |
4281 | dev_priv->num_fence_regs = 8; | |
4282 | ||
b5aa8a0f GH |
4283 | /* Initialize fence registers to zero */ |
4284 | if (IS_I965G(dev)) { | |
4285 | for (i = 0; i < 16; i++) | |
4286 | I915_WRITE64(FENCE_REG_965_0 + (i * 8), 0); | |
4287 | } else { | |
4288 | for (i = 0; i < 8; i++) | |
4289 | I915_WRITE(FENCE_REG_830_0 + (i * 4), 0); | |
4290 | if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) | |
4291 | for (i = 0; i < 8; i++) | |
4292 | I915_WRITE(FENCE_REG_945_8 + (i * 4), 0); | |
4293 | } | |
4294 | ||
673a394b EA |
4295 | i915_gem_detect_bit_6_swizzle(dev); |
4296 | } | |
71acb5eb DA |
4297 | |
4298 | /* | |
4299 | * Create a physically contiguous memory object for this object | |
4300 | * e.g. for cursor + overlay regs | |
4301 | */ | |
4302 | int i915_gem_init_phys_object(struct drm_device *dev, | |
4303 | int id, int size) | |
4304 | { | |
4305 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4306 | struct drm_i915_gem_phys_object *phys_obj; | |
4307 | int ret; | |
4308 | ||
4309 | if (dev_priv->mm.phys_objs[id - 1] || !size) | |
4310 | return 0; | |
4311 | ||
9a298b2a | 4312 | phys_obj = kzalloc(sizeof(struct drm_i915_gem_phys_object), GFP_KERNEL); |
71acb5eb DA |
4313 | if (!phys_obj) |
4314 | return -ENOMEM; | |
4315 | ||
4316 | phys_obj->id = id; | |
4317 | ||
4318 | phys_obj->handle = drm_pci_alloc(dev, size, 0, 0xffffffff); | |
4319 | if (!phys_obj->handle) { | |
4320 | ret = -ENOMEM; | |
4321 | goto kfree_obj; | |
4322 | } | |
4323 | #ifdef CONFIG_X86 | |
4324 | set_memory_wc((unsigned long)phys_obj->handle->vaddr, phys_obj->handle->size / PAGE_SIZE); | |
4325 | #endif | |
4326 | ||
4327 | dev_priv->mm.phys_objs[id - 1] = phys_obj; | |
4328 | ||
4329 | return 0; | |
4330 | kfree_obj: | |
9a298b2a | 4331 | kfree(phys_obj); |
71acb5eb DA |
4332 | return ret; |
4333 | } | |
4334 | ||
4335 | void i915_gem_free_phys_object(struct drm_device *dev, int id) | |
4336 | { | |
4337 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4338 | struct drm_i915_gem_phys_object *phys_obj; | |
4339 | ||
4340 | if (!dev_priv->mm.phys_objs[id - 1]) | |
4341 | return; | |
4342 | ||
4343 | phys_obj = dev_priv->mm.phys_objs[id - 1]; | |
4344 | if (phys_obj->cur_obj) { | |
4345 | i915_gem_detach_phys_object(dev, phys_obj->cur_obj); | |
4346 | } | |
4347 | ||
4348 | #ifdef CONFIG_X86 | |
4349 | set_memory_wb((unsigned long)phys_obj->handle->vaddr, phys_obj->handle->size / PAGE_SIZE); | |
4350 | #endif | |
4351 | drm_pci_free(dev, phys_obj->handle); | |
4352 | kfree(phys_obj); | |
4353 | dev_priv->mm.phys_objs[id - 1] = NULL; | |
4354 | } | |
4355 | ||
4356 | void i915_gem_free_all_phys_object(struct drm_device *dev) | |
4357 | { | |
4358 | int i; | |
4359 | ||
260883c8 | 4360 | for (i = I915_GEM_PHYS_CURSOR_0; i <= I915_MAX_PHYS_OBJECT; i++) |
71acb5eb DA |
4361 | i915_gem_free_phys_object(dev, i); |
4362 | } | |
4363 | ||
4364 | void i915_gem_detach_phys_object(struct drm_device *dev, | |
4365 | struct drm_gem_object *obj) | |
4366 | { | |
4367 | struct drm_i915_gem_object *obj_priv; | |
4368 | int i; | |
4369 | int ret; | |
4370 | int page_count; | |
4371 | ||
4372 | obj_priv = obj->driver_private; | |
4373 | if (!obj_priv->phys_obj) | |
4374 | return; | |
4375 | ||
856fa198 | 4376 | ret = i915_gem_object_get_pages(obj); |
71acb5eb DA |
4377 | if (ret) |
4378 | goto out; | |
4379 | ||
4380 | page_count = obj->size / PAGE_SIZE; | |
4381 | ||
4382 | for (i = 0; i < page_count; i++) { | |
856fa198 | 4383 | char *dst = kmap_atomic(obj_priv->pages[i], KM_USER0); |
71acb5eb DA |
4384 | char *src = obj_priv->phys_obj->handle->vaddr + (i * PAGE_SIZE); |
4385 | ||
4386 | memcpy(dst, src, PAGE_SIZE); | |
4387 | kunmap_atomic(dst, KM_USER0); | |
4388 | } | |
856fa198 | 4389 | drm_clflush_pages(obj_priv->pages, page_count); |
71acb5eb | 4390 | drm_agp_chipset_flush(dev); |
d78b47b9 CW |
4391 | |
4392 | i915_gem_object_put_pages(obj); | |
71acb5eb DA |
4393 | out: |
4394 | obj_priv->phys_obj->cur_obj = NULL; | |
4395 | obj_priv->phys_obj = NULL; | |
4396 | } | |
4397 | ||
4398 | int | |
4399 | i915_gem_attach_phys_object(struct drm_device *dev, | |
4400 | struct drm_gem_object *obj, int id) | |
4401 | { | |
4402 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4403 | struct drm_i915_gem_object *obj_priv; | |
4404 | int ret = 0; | |
4405 | int page_count; | |
4406 | int i; | |
4407 | ||
4408 | if (id > I915_MAX_PHYS_OBJECT) | |
4409 | return -EINVAL; | |
4410 | ||
4411 | obj_priv = obj->driver_private; | |
4412 | ||
4413 | if (obj_priv->phys_obj) { | |
4414 | if (obj_priv->phys_obj->id == id) | |
4415 | return 0; | |
4416 | i915_gem_detach_phys_object(dev, obj); | |
4417 | } | |
4418 | ||
4419 | ||
4420 | /* create a new object */ | |
4421 | if (!dev_priv->mm.phys_objs[id - 1]) { | |
4422 | ret = i915_gem_init_phys_object(dev, id, | |
4423 | obj->size); | |
4424 | if (ret) { | |
aeb565df | 4425 | DRM_ERROR("failed to init phys object %d size: %zu\n", id, obj->size); |
71acb5eb DA |
4426 | goto out; |
4427 | } | |
4428 | } | |
4429 | ||
4430 | /* bind to the object */ | |
4431 | obj_priv->phys_obj = dev_priv->mm.phys_objs[id - 1]; | |
4432 | obj_priv->phys_obj->cur_obj = obj; | |
4433 | ||
856fa198 | 4434 | ret = i915_gem_object_get_pages(obj); |
71acb5eb DA |
4435 | if (ret) { |
4436 | DRM_ERROR("failed to get page list\n"); | |
4437 | goto out; | |
4438 | } | |
4439 | ||
4440 | page_count = obj->size / PAGE_SIZE; | |
4441 | ||
4442 | for (i = 0; i < page_count; i++) { | |
856fa198 | 4443 | char *src = kmap_atomic(obj_priv->pages[i], KM_USER0); |
71acb5eb DA |
4444 | char *dst = obj_priv->phys_obj->handle->vaddr + (i * PAGE_SIZE); |
4445 | ||
4446 | memcpy(dst, src, PAGE_SIZE); | |
4447 | kunmap_atomic(src, KM_USER0); | |
4448 | } | |
4449 | ||
d78b47b9 CW |
4450 | i915_gem_object_put_pages(obj); |
4451 | ||
71acb5eb DA |
4452 | return 0; |
4453 | out: | |
4454 | return ret; | |
4455 | } | |
4456 | ||
4457 | static int | |
4458 | i915_gem_phys_pwrite(struct drm_device *dev, struct drm_gem_object *obj, | |
4459 | struct drm_i915_gem_pwrite *args, | |
4460 | struct drm_file *file_priv) | |
4461 | { | |
4462 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
4463 | void *obj_addr; | |
4464 | int ret; | |
4465 | char __user *user_data; | |
4466 | ||
4467 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
4468 | obj_addr = obj_priv->phys_obj->handle->vaddr + args->offset; | |
4469 | ||
e08fb4f6 | 4470 | DRM_DEBUG("obj_addr %p, %lld\n", obj_addr, args->size); |
71acb5eb DA |
4471 | ret = copy_from_user(obj_addr, user_data, args->size); |
4472 | if (ret) | |
4473 | return -EFAULT; | |
4474 | ||
4475 | drm_agp_chipset_flush(dev); | |
4476 | return 0; | |
4477 | } | |
b962442e EA |
4478 | |
4479 | void i915_gem_release(struct drm_device * dev, struct drm_file *file_priv) | |
4480 | { | |
4481 | struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv; | |
4482 | ||
4483 | /* Clean up our request list when the client is going away, so that | |
4484 | * later retire_requests won't dereference our soon-to-be-gone | |
4485 | * file_priv. | |
4486 | */ | |
4487 | mutex_lock(&dev->struct_mutex); | |
4488 | while (!list_empty(&i915_file_priv->mm.request_list)) | |
4489 | list_del_init(i915_file_priv->mm.request_list.next); | |
4490 | mutex_unlock(&dev->struct_mutex); | |
4491 | } | |
31169714 CW |
4492 | |
4493 | /* Immediately discard the backing storage */ | |
4494 | static void | |
4495 | i915_gem_object_truncate(struct drm_gem_object *obj) | |
4496 | { | |
4497 | struct inode *inode; | |
4498 | ||
4499 | inode = obj->filp->f_path.dentry->d_inode; | |
4500 | ||
4501 | mutex_lock(&inode->i_mutex); | |
4502 | truncate_inode_pages(inode->i_mapping, 0); | |
4503 | mutex_unlock(&inode->i_mutex); | |
4504 | } | |
4505 | ||
4506 | static inline int | |
4507 | i915_gem_object_is_purgeable(struct drm_i915_gem_object *obj_priv) | |
4508 | { | |
4509 | return !obj_priv->dirty; | |
4510 | } | |
4511 | ||
4512 | static int | |
4513 | i915_gem_shrink(int nr_to_scan, gfp_t gfp_mask) | |
4514 | { | |
4515 | drm_i915_private_t *dev_priv, *next_dev; | |
4516 | struct drm_i915_gem_object *obj_priv, *next_obj; | |
4517 | int cnt = 0; | |
4518 | int would_deadlock = 1; | |
4519 | ||
4520 | /* "fast-path" to count number of available objects */ | |
4521 | if (nr_to_scan == 0) { | |
4522 | spin_lock(&shrink_list_lock); | |
4523 | list_for_each_entry(dev_priv, &shrink_list, mm.shrink_list) { | |
4524 | struct drm_device *dev = dev_priv->dev; | |
4525 | ||
4526 | if (mutex_trylock(&dev->struct_mutex)) { | |
4527 | list_for_each_entry(obj_priv, | |
4528 | &dev_priv->mm.inactive_list, | |
4529 | list) | |
4530 | cnt++; | |
4531 | mutex_unlock(&dev->struct_mutex); | |
4532 | } | |
4533 | } | |
4534 | spin_unlock(&shrink_list_lock); | |
4535 | ||
4536 | return (cnt / 100) * sysctl_vfs_cache_pressure; | |
4537 | } | |
4538 | ||
4539 | spin_lock(&shrink_list_lock); | |
4540 | ||
4541 | /* first scan for clean buffers */ | |
4542 | list_for_each_entry_safe(dev_priv, next_dev, | |
4543 | &shrink_list, mm.shrink_list) { | |
4544 | struct drm_device *dev = dev_priv->dev; | |
4545 | ||
4546 | if (! mutex_trylock(&dev->struct_mutex)) | |
4547 | continue; | |
4548 | ||
4549 | spin_unlock(&shrink_list_lock); | |
4550 | ||
4551 | i915_gem_retire_requests(dev); | |
4552 | ||
4553 | list_for_each_entry_safe(obj_priv, next_obj, | |
4554 | &dev_priv->mm.inactive_list, | |
4555 | list) { | |
4556 | if (i915_gem_object_is_purgeable(obj_priv)) { | |
4557 | struct drm_gem_object *obj = obj_priv->obj; | |
4558 | i915_gem_object_unbind(obj); | |
4559 | i915_gem_object_truncate(obj); | |
4560 | ||
4561 | if (--nr_to_scan <= 0) | |
4562 | break; | |
4563 | } | |
4564 | } | |
4565 | ||
4566 | spin_lock(&shrink_list_lock); | |
4567 | mutex_unlock(&dev->struct_mutex); | |
4568 | ||
4569 | if (nr_to_scan <= 0) | |
4570 | break; | |
4571 | } | |
4572 | ||
4573 | /* second pass, evict/count anything still on the inactive list */ | |
4574 | list_for_each_entry_safe(dev_priv, next_dev, | |
4575 | &shrink_list, mm.shrink_list) { | |
4576 | struct drm_device *dev = dev_priv->dev; | |
4577 | ||
4578 | if (! mutex_trylock(&dev->struct_mutex)) | |
4579 | continue; | |
4580 | ||
4581 | spin_unlock(&shrink_list_lock); | |
4582 | ||
4583 | list_for_each_entry_safe(obj_priv, next_obj, | |
4584 | &dev_priv->mm.inactive_list, | |
4585 | list) { | |
4586 | if (nr_to_scan > 0) { | |
4587 | struct drm_gem_object *obj = obj_priv->obj; | |
4588 | i915_gem_object_unbind(obj); | |
4589 | if (i915_gem_object_is_purgeable(obj_priv)) | |
4590 | i915_gem_object_truncate(obj); | |
4591 | ||
4592 | nr_to_scan--; | |
4593 | } else | |
4594 | cnt++; | |
4595 | } | |
4596 | ||
4597 | spin_lock(&shrink_list_lock); | |
4598 | mutex_unlock(&dev->struct_mutex); | |
4599 | ||
4600 | would_deadlock = 0; | |
4601 | } | |
4602 | ||
4603 | spin_unlock(&shrink_list_lock); | |
4604 | ||
4605 | if (would_deadlock) | |
4606 | return -1; | |
4607 | else if (cnt > 0) | |
4608 | return (cnt / 100) * sysctl_vfs_cache_pressure; | |
4609 | else | |
4610 | return 0; | |
4611 | } | |
4612 | ||
4613 | static struct shrinker shrinker = { | |
4614 | .shrink = i915_gem_shrink, | |
4615 | .seeks = DEFAULT_SEEKS, | |
4616 | }; | |
4617 | ||
4618 | __init void | |
4619 | i915_gem_shrinker_init(void) | |
4620 | { | |
4621 | register_shrinker(&shrinker); | |
4622 | } | |
4623 | ||
4624 | __exit void | |
4625 | i915_gem_shrinker_exit(void) | |
4626 | { | |
4627 | unregister_shrinker(&shrinker); | |
4628 | } |