Commit | Line | Data |
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673a394b EA |
1 | /* |
2 | * Copyright © 2008 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Eric Anholt <eric@anholt.net> | |
25 | * | |
26 | */ | |
27 | ||
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 | 50 | static void i915_gem_clear_fence_reg(struct drm_gem_object *obj); |
07f73f69 CW |
51 | static int i915_gem_evict_something(struct drm_device *dev, int min_size); |
52 | static int i915_gem_evict_from_list(struct drm_device *dev, | |
53 | struct list_head *head); | |
71acb5eb DA |
54 | static int i915_gem_phys_pwrite(struct drm_device *dev, struct drm_gem_object *obj, |
55 | struct drm_i915_gem_pwrite *args, | |
56 | struct drm_file *file_priv); | |
673a394b | 57 | |
31169714 CW |
58 | static LIST_HEAD(shrink_list); |
59 | static DEFINE_SPINLOCK(shrink_list_lock); | |
60 | ||
79e53945 JB |
61 | int i915_gem_do_init(struct drm_device *dev, unsigned long start, |
62 | unsigned long end) | |
673a394b EA |
63 | { |
64 | drm_i915_private_t *dev_priv = dev->dev_private; | |
673a394b | 65 | |
79e53945 JB |
66 | if (start >= end || |
67 | (start & (PAGE_SIZE - 1)) != 0 || | |
68 | (end & (PAGE_SIZE - 1)) != 0) { | |
673a394b EA |
69 | return -EINVAL; |
70 | } | |
71 | ||
79e53945 JB |
72 | drm_mm_init(&dev_priv->mm.gtt_space, start, |
73 | end - start); | |
673a394b | 74 | |
79e53945 JB |
75 | dev->gtt_total = (uint32_t) (end - start); |
76 | ||
77 | return 0; | |
78 | } | |
673a394b | 79 | |
79e53945 JB |
80 | int |
81 | i915_gem_init_ioctl(struct drm_device *dev, void *data, | |
82 | struct drm_file *file_priv) | |
83 | { | |
84 | struct drm_i915_gem_init *args = data; | |
85 | int ret; | |
86 | ||
87 | mutex_lock(&dev->struct_mutex); | |
88 | ret = i915_gem_do_init(dev, args->gtt_start, args->gtt_end); | |
673a394b EA |
89 | mutex_unlock(&dev->struct_mutex); |
90 | ||
79e53945 | 91 | return ret; |
673a394b EA |
92 | } |
93 | ||
5a125c3c EA |
94 | int |
95 | i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, | |
96 | struct drm_file *file_priv) | |
97 | { | |
5a125c3c | 98 | struct drm_i915_gem_get_aperture *args = data; |
5a125c3c EA |
99 | |
100 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
101 | return -ENODEV; | |
102 | ||
103 | args->aper_size = dev->gtt_total; | |
2678d9d6 KP |
104 | args->aper_available_size = (args->aper_size - |
105 | atomic_read(&dev->pin_memory)); | |
5a125c3c EA |
106 | |
107 | return 0; | |
108 | } | |
109 | ||
673a394b EA |
110 | |
111 | /** | |
112 | * Creates a new mm object and returns a handle to it. | |
113 | */ | |
114 | int | |
115 | i915_gem_create_ioctl(struct drm_device *dev, void *data, | |
116 | struct drm_file *file_priv) | |
117 | { | |
118 | struct drm_i915_gem_create *args = data; | |
119 | struct drm_gem_object *obj; | |
a1a2d1d3 PP |
120 | int ret; |
121 | u32 handle; | |
673a394b EA |
122 | |
123 | args->size = roundup(args->size, PAGE_SIZE); | |
124 | ||
125 | /* Allocate the new object */ | |
126 | obj = drm_gem_object_alloc(dev, args->size); | |
127 | if (obj == NULL) | |
128 | return -ENOMEM; | |
129 | ||
130 | ret = drm_gem_handle_create(file_priv, obj, &handle); | |
131 | mutex_lock(&dev->struct_mutex); | |
132 | drm_gem_object_handle_unreference(obj); | |
133 | mutex_unlock(&dev->struct_mutex); | |
134 | ||
135 | if (ret) | |
136 | return ret; | |
137 | ||
138 | args->handle = handle; | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
eb01459f EA |
143 | static inline int |
144 | fast_shmem_read(struct page **pages, | |
145 | loff_t page_base, int page_offset, | |
146 | char __user *data, | |
147 | int length) | |
148 | { | |
149 | char __iomem *vaddr; | |
2bc43b5c | 150 | int unwritten; |
eb01459f EA |
151 | |
152 | vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0); | |
153 | if (vaddr == NULL) | |
154 | return -ENOMEM; | |
2bc43b5c | 155 | unwritten = __copy_to_user_inatomic(data, vaddr + page_offset, length); |
eb01459f EA |
156 | kunmap_atomic(vaddr, KM_USER0); |
157 | ||
2bc43b5c FM |
158 | if (unwritten) |
159 | return -EFAULT; | |
160 | ||
161 | return 0; | |
eb01459f EA |
162 | } |
163 | ||
280b713b EA |
164 | static int i915_gem_object_needs_bit17_swizzle(struct drm_gem_object *obj) |
165 | { | |
166 | drm_i915_private_t *dev_priv = obj->dev->dev_private; | |
167 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
168 | ||
169 | return dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 && | |
170 | obj_priv->tiling_mode != I915_TILING_NONE; | |
171 | } | |
172 | ||
40123c1f EA |
173 | static inline int |
174 | slow_shmem_copy(struct page *dst_page, | |
175 | int dst_offset, | |
176 | struct page *src_page, | |
177 | int src_offset, | |
178 | int length) | |
179 | { | |
180 | char *dst_vaddr, *src_vaddr; | |
181 | ||
182 | dst_vaddr = kmap_atomic(dst_page, KM_USER0); | |
183 | if (dst_vaddr == NULL) | |
184 | return -ENOMEM; | |
185 | ||
186 | src_vaddr = kmap_atomic(src_page, KM_USER1); | |
187 | if (src_vaddr == NULL) { | |
188 | kunmap_atomic(dst_vaddr, KM_USER0); | |
189 | return -ENOMEM; | |
190 | } | |
191 | ||
192 | memcpy(dst_vaddr + dst_offset, src_vaddr + src_offset, length); | |
193 | ||
194 | kunmap_atomic(src_vaddr, KM_USER1); | |
195 | kunmap_atomic(dst_vaddr, KM_USER0); | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
280b713b EA |
200 | static inline int |
201 | slow_shmem_bit17_copy(struct page *gpu_page, | |
202 | int gpu_offset, | |
203 | struct page *cpu_page, | |
204 | int cpu_offset, | |
205 | int length, | |
206 | int is_read) | |
207 | { | |
208 | char *gpu_vaddr, *cpu_vaddr; | |
209 | ||
210 | /* Use the unswizzled path if this page isn't affected. */ | |
211 | if ((page_to_phys(gpu_page) & (1 << 17)) == 0) { | |
212 | if (is_read) | |
213 | return slow_shmem_copy(cpu_page, cpu_offset, | |
214 | gpu_page, gpu_offset, length); | |
215 | else | |
216 | return slow_shmem_copy(gpu_page, gpu_offset, | |
217 | cpu_page, cpu_offset, length); | |
218 | } | |
219 | ||
220 | gpu_vaddr = kmap_atomic(gpu_page, KM_USER0); | |
221 | if (gpu_vaddr == NULL) | |
222 | return -ENOMEM; | |
223 | ||
224 | cpu_vaddr = kmap_atomic(cpu_page, KM_USER1); | |
225 | if (cpu_vaddr == NULL) { | |
226 | kunmap_atomic(gpu_vaddr, KM_USER0); | |
227 | return -ENOMEM; | |
228 | } | |
229 | ||
230 | /* Copy the data, XORing A6 with A17 (1). The user already knows he's | |
231 | * XORing with the other bits (A9 for Y, A9 and A10 for X) | |
232 | */ | |
233 | while (length > 0) { | |
234 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
235 | int this_length = min(cacheline_end - gpu_offset, length); | |
236 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
237 | ||
238 | if (is_read) { | |
239 | memcpy(cpu_vaddr + cpu_offset, | |
240 | gpu_vaddr + swizzled_gpu_offset, | |
241 | this_length); | |
242 | } else { | |
243 | memcpy(gpu_vaddr + swizzled_gpu_offset, | |
244 | cpu_vaddr + cpu_offset, | |
245 | this_length); | |
246 | } | |
247 | cpu_offset += this_length; | |
248 | gpu_offset += this_length; | |
249 | length -= this_length; | |
250 | } | |
251 | ||
252 | kunmap_atomic(cpu_vaddr, KM_USER1); | |
253 | kunmap_atomic(gpu_vaddr, KM_USER0); | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
eb01459f EA |
258 | /** |
259 | * This is the fast shmem pread path, which attempts to copy_from_user directly | |
260 | * from the backing pages of the object to the user's address space. On a | |
261 | * fault, it fails so we can fall back to i915_gem_shmem_pwrite_slow(). | |
262 | */ | |
263 | static int | |
264 | i915_gem_shmem_pread_fast(struct drm_device *dev, struct drm_gem_object *obj, | |
265 | struct drm_i915_gem_pread *args, | |
266 | struct drm_file *file_priv) | |
267 | { | |
268 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
269 | ssize_t remain; | |
270 | loff_t offset, page_base; | |
271 | char __user *user_data; | |
272 | int page_offset, page_length; | |
273 | int ret; | |
274 | ||
275 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
276 | remain = args->size; | |
277 | ||
278 | mutex_lock(&dev->struct_mutex); | |
279 | ||
280 | ret = i915_gem_object_get_pages(obj); | |
281 | if (ret != 0) | |
282 | goto fail_unlock; | |
283 | ||
284 | ret = i915_gem_object_set_cpu_read_domain_range(obj, args->offset, | |
285 | args->size); | |
286 | if (ret != 0) | |
287 | goto fail_put_pages; | |
288 | ||
289 | obj_priv = obj->driver_private; | |
290 | offset = args->offset; | |
291 | ||
292 | while (remain > 0) { | |
293 | /* Operation in this page | |
294 | * | |
295 | * page_base = page offset within aperture | |
296 | * page_offset = offset within page | |
297 | * page_length = bytes to copy for this page | |
298 | */ | |
299 | page_base = (offset & ~(PAGE_SIZE-1)); | |
300 | page_offset = offset & (PAGE_SIZE-1); | |
301 | page_length = remain; | |
302 | if ((page_offset + remain) > PAGE_SIZE) | |
303 | page_length = PAGE_SIZE - page_offset; | |
304 | ||
305 | ret = fast_shmem_read(obj_priv->pages, | |
306 | page_base, page_offset, | |
307 | user_data, page_length); | |
308 | if (ret) | |
309 | goto fail_put_pages; | |
310 | ||
311 | remain -= page_length; | |
312 | user_data += page_length; | |
313 | offset += page_length; | |
314 | } | |
315 | ||
316 | fail_put_pages: | |
317 | i915_gem_object_put_pages(obj); | |
318 | fail_unlock: | |
319 | mutex_unlock(&dev->struct_mutex); | |
320 | ||
321 | return ret; | |
322 | } | |
323 | ||
07f73f69 CW |
324 | static inline gfp_t |
325 | i915_gem_object_get_page_gfp_mask (struct drm_gem_object *obj) | |
326 | { | |
327 | return mapping_gfp_mask(obj->filp->f_path.dentry->d_inode->i_mapping); | |
328 | } | |
329 | ||
330 | static inline void | |
331 | i915_gem_object_set_page_gfp_mask (struct drm_gem_object *obj, gfp_t gfp) | |
332 | { | |
333 | mapping_set_gfp_mask(obj->filp->f_path.dentry->d_inode->i_mapping, gfp); | |
334 | } | |
335 | ||
336 | static int | |
337 | i915_gem_object_get_pages_or_evict(struct drm_gem_object *obj) | |
338 | { | |
339 | int ret; | |
340 | ||
341 | ret = i915_gem_object_get_pages(obj); | |
342 | ||
343 | /* If we've insufficient memory to map in the pages, attempt | |
344 | * to make some space by throwing out some old buffers. | |
345 | */ | |
346 | if (ret == -ENOMEM) { | |
347 | struct drm_device *dev = obj->dev; | |
348 | gfp_t gfp; | |
349 | ||
350 | ret = i915_gem_evict_something(dev, obj->size); | |
351 | if (ret) | |
352 | return ret; | |
353 | ||
354 | gfp = i915_gem_object_get_page_gfp_mask(obj); | |
355 | i915_gem_object_set_page_gfp_mask(obj, gfp & ~__GFP_NORETRY); | |
356 | ret = i915_gem_object_get_pages(obj); | |
357 | i915_gem_object_set_page_gfp_mask (obj, gfp); | |
358 | } | |
359 | ||
360 | return ret; | |
361 | } | |
362 | ||
eb01459f EA |
363 | /** |
364 | * This is the fallback shmem pread path, which allocates temporary storage | |
365 | * in kernel space to copy_to_user into outside of the struct_mutex, so we | |
366 | * can copy out of the object's backing pages while holding the struct mutex | |
367 | * and not take page faults. | |
368 | */ | |
369 | static int | |
370 | i915_gem_shmem_pread_slow(struct drm_device *dev, struct drm_gem_object *obj, | |
371 | struct drm_i915_gem_pread *args, | |
372 | struct drm_file *file_priv) | |
373 | { | |
374 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
375 | struct mm_struct *mm = current->mm; | |
376 | struct page **user_pages; | |
377 | ssize_t remain; | |
378 | loff_t offset, pinned_pages, i; | |
379 | loff_t first_data_page, last_data_page, num_pages; | |
380 | int shmem_page_index, shmem_page_offset; | |
381 | int data_page_index, data_page_offset; | |
382 | int page_length; | |
383 | int ret; | |
384 | uint64_t data_ptr = args->data_ptr; | |
280b713b | 385 | int do_bit17_swizzling; |
eb01459f EA |
386 | |
387 | remain = args->size; | |
388 | ||
389 | /* Pin the user pages containing the data. We can't fault while | |
390 | * holding the struct mutex, yet we want to hold it while | |
391 | * dereferencing the user data. | |
392 | */ | |
393 | first_data_page = data_ptr / PAGE_SIZE; | |
394 | last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; | |
395 | num_pages = last_data_page - first_data_page + 1; | |
396 | ||
8e7d2b2c | 397 | user_pages = drm_calloc_large(num_pages, sizeof(struct page *)); |
eb01459f EA |
398 | if (user_pages == NULL) |
399 | return -ENOMEM; | |
400 | ||
401 | down_read(&mm->mmap_sem); | |
402 | pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, | |
e5e9ecde | 403 | num_pages, 1, 0, user_pages, NULL); |
eb01459f EA |
404 | up_read(&mm->mmap_sem); |
405 | if (pinned_pages < num_pages) { | |
406 | ret = -EFAULT; | |
407 | goto fail_put_user_pages; | |
408 | } | |
409 | ||
280b713b EA |
410 | do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
411 | ||
eb01459f EA |
412 | mutex_lock(&dev->struct_mutex); |
413 | ||
07f73f69 CW |
414 | ret = i915_gem_object_get_pages_or_evict(obj); |
415 | if (ret) | |
eb01459f EA |
416 | goto fail_unlock; |
417 | ||
418 | ret = i915_gem_object_set_cpu_read_domain_range(obj, args->offset, | |
419 | args->size); | |
420 | if (ret != 0) | |
421 | goto fail_put_pages; | |
422 | ||
423 | obj_priv = obj->driver_private; | |
424 | offset = args->offset; | |
425 | ||
426 | while (remain > 0) { | |
427 | /* Operation in this page | |
428 | * | |
429 | * shmem_page_index = page number within shmem file | |
430 | * shmem_page_offset = offset within page in shmem file | |
431 | * data_page_index = page number in get_user_pages return | |
432 | * data_page_offset = offset with data_page_index page. | |
433 | * page_length = bytes to copy for this page | |
434 | */ | |
435 | shmem_page_index = offset / PAGE_SIZE; | |
436 | shmem_page_offset = offset & ~PAGE_MASK; | |
437 | data_page_index = data_ptr / PAGE_SIZE - first_data_page; | |
438 | data_page_offset = data_ptr & ~PAGE_MASK; | |
439 | ||
440 | page_length = remain; | |
441 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
442 | page_length = PAGE_SIZE - shmem_page_offset; | |
443 | if ((data_page_offset + page_length) > PAGE_SIZE) | |
444 | page_length = PAGE_SIZE - data_page_offset; | |
445 | ||
280b713b EA |
446 | if (do_bit17_swizzling) { |
447 | ret = slow_shmem_bit17_copy(obj_priv->pages[shmem_page_index], | |
448 | shmem_page_offset, | |
449 | user_pages[data_page_index], | |
450 | data_page_offset, | |
451 | page_length, | |
452 | 1); | |
453 | } else { | |
454 | ret = slow_shmem_copy(user_pages[data_page_index], | |
455 | data_page_offset, | |
456 | obj_priv->pages[shmem_page_index], | |
457 | shmem_page_offset, | |
458 | page_length); | |
459 | } | |
eb01459f EA |
460 | if (ret) |
461 | goto fail_put_pages; | |
462 | ||
463 | remain -= page_length; | |
464 | data_ptr += page_length; | |
465 | offset += page_length; | |
466 | } | |
467 | ||
468 | fail_put_pages: | |
469 | i915_gem_object_put_pages(obj); | |
470 | fail_unlock: | |
471 | mutex_unlock(&dev->struct_mutex); | |
472 | fail_put_user_pages: | |
473 | for (i = 0; i < pinned_pages; i++) { | |
474 | SetPageDirty(user_pages[i]); | |
475 | page_cache_release(user_pages[i]); | |
476 | } | |
8e7d2b2c | 477 | drm_free_large(user_pages); |
eb01459f EA |
478 | |
479 | return ret; | |
480 | } | |
481 | ||
673a394b EA |
482 | /** |
483 | * Reads data from the object referenced by handle. | |
484 | * | |
485 | * On error, the contents of *data are undefined. | |
486 | */ | |
487 | int | |
488 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, | |
489 | struct drm_file *file_priv) | |
490 | { | |
491 | struct drm_i915_gem_pread *args = data; | |
492 | struct drm_gem_object *obj; | |
493 | struct drm_i915_gem_object *obj_priv; | |
673a394b EA |
494 | int ret; |
495 | ||
496 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
497 | if (obj == NULL) | |
498 | return -EBADF; | |
499 | obj_priv = obj->driver_private; | |
500 | ||
501 | /* Bounds check source. | |
502 | * | |
503 | * XXX: This could use review for overflow issues... | |
504 | */ | |
505 | if (args->offset > obj->size || args->size > obj->size || | |
506 | args->offset + args->size > obj->size) { | |
507 | drm_gem_object_unreference(obj); | |
508 | return -EINVAL; | |
509 | } | |
510 | ||
280b713b | 511 | if (i915_gem_object_needs_bit17_swizzle(obj)) { |
eb01459f | 512 | ret = i915_gem_shmem_pread_slow(dev, obj, args, file_priv); |
280b713b EA |
513 | } else { |
514 | ret = i915_gem_shmem_pread_fast(dev, obj, args, file_priv); | |
515 | if (ret != 0) | |
516 | ret = i915_gem_shmem_pread_slow(dev, obj, args, | |
517 | file_priv); | |
518 | } | |
673a394b EA |
519 | |
520 | drm_gem_object_unreference(obj); | |
673a394b | 521 | |
eb01459f | 522 | return ret; |
673a394b EA |
523 | } |
524 | ||
0839ccb8 KP |
525 | /* This is the fast write path which cannot handle |
526 | * page faults in the source data | |
9b7530cc | 527 | */ |
0839ccb8 KP |
528 | |
529 | static inline int | |
530 | fast_user_write(struct io_mapping *mapping, | |
531 | loff_t page_base, int page_offset, | |
532 | char __user *user_data, | |
533 | int length) | |
9b7530cc | 534 | { |
9b7530cc | 535 | char *vaddr_atomic; |
0839ccb8 | 536 | unsigned long unwritten; |
9b7530cc | 537 | |
0839ccb8 KP |
538 | vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base); |
539 | unwritten = __copy_from_user_inatomic_nocache(vaddr_atomic + page_offset, | |
540 | user_data, length); | |
541 | io_mapping_unmap_atomic(vaddr_atomic); | |
542 | if (unwritten) | |
543 | return -EFAULT; | |
544 | return 0; | |
545 | } | |
546 | ||
547 | /* Here's the write path which can sleep for | |
548 | * page faults | |
549 | */ | |
550 | ||
551 | static inline int | |
3de09aa3 EA |
552 | slow_kernel_write(struct io_mapping *mapping, |
553 | loff_t gtt_base, int gtt_offset, | |
554 | struct page *user_page, int user_offset, | |
555 | int length) | |
0839ccb8 | 556 | { |
3de09aa3 | 557 | char *src_vaddr, *dst_vaddr; |
0839ccb8 KP |
558 | unsigned long unwritten; |
559 | ||
3de09aa3 EA |
560 | dst_vaddr = io_mapping_map_atomic_wc(mapping, gtt_base); |
561 | src_vaddr = kmap_atomic(user_page, KM_USER1); | |
562 | unwritten = __copy_from_user_inatomic_nocache(dst_vaddr + gtt_offset, | |
563 | src_vaddr + user_offset, | |
564 | length); | |
565 | kunmap_atomic(src_vaddr, KM_USER1); | |
566 | io_mapping_unmap_atomic(dst_vaddr); | |
0839ccb8 KP |
567 | if (unwritten) |
568 | return -EFAULT; | |
9b7530cc | 569 | return 0; |
9b7530cc LT |
570 | } |
571 | ||
40123c1f EA |
572 | static inline int |
573 | fast_shmem_write(struct page **pages, | |
574 | loff_t page_base, int page_offset, | |
575 | char __user *data, | |
576 | int length) | |
577 | { | |
578 | char __iomem *vaddr; | |
d0088775 | 579 | unsigned long unwritten; |
40123c1f EA |
580 | |
581 | vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0); | |
582 | if (vaddr == NULL) | |
583 | return -ENOMEM; | |
d0088775 | 584 | unwritten = __copy_from_user_inatomic(vaddr + page_offset, data, length); |
40123c1f EA |
585 | kunmap_atomic(vaddr, KM_USER0); |
586 | ||
d0088775 DA |
587 | if (unwritten) |
588 | return -EFAULT; | |
40123c1f EA |
589 | return 0; |
590 | } | |
591 | ||
3de09aa3 EA |
592 | /** |
593 | * This is the fast pwrite path, where we copy the data directly from the | |
594 | * user into the GTT, uncached. | |
595 | */ | |
673a394b | 596 | static int |
3de09aa3 EA |
597 | i915_gem_gtt_pwrite_fast(struct drm_device *dev, struct drm_gem_object *obj, |
598 | struct drm_i915_gem_pwrite *args, | |
599 | struct drm_file *file_priv) | |
673a394b EA |
600 | { |
601 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
0839ccb8 | 602 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b | 603 | ssize_t remain; |
0839ccb8 | 604 | loff_t offset, page_base; |
673a394b | 605 | char __user *user_data; |
0839ccb8 KP |
606 | int page_offset, page_length; |
607 | int ret; | |
673a394b EA |
608 | |
609 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
610 | remain = args->size; | |
611 | if (!access_ok(VERIFY_READ, user_data, remain)) | |
612 | return -EFAULT; | |
613 | ||
614 | ||
615 | mutex_lock(&dev->struct_mutex); | |
616 | ret = i915_gem_object_pin(obj, 0); | |
617 | if (ret) { | |
618 | mutex_unlock(&dev->struct_mutex); | |
619 | return ret; | |
620 | } | |
2ef7eeaa | 621 | ret = i915_gem_object_set_to_gtt_domain(obj, 1); |
673a394b EA |
622 | if (ret) |
623 | goto fail; | |
624 | ||
625 | obj_priv = obj->driver_private; | |
626 | offset = obj_priv->gtt_offset + args->offset; | |
673a394b EA |
627 | |
628 | while (remain > 0) { | |
629 | /* Operation in this page | |
630 | * | |
0839ccb8 KP |
631 | * page_base = page offset within aperture |
632 | * page_offset = offset within page | |
633 | * page_length = bytes to copy for this page | |
673a394b | 634 | */ |
0839ccb8 KP |
635 | page_base = (offset & ~(PAGE_SIZE-1)); |
636 | page_offset = offset & (PAGE_SIZE-1); | |
637 | page_length = remain; | |
638 | if ((page_offset + remain) > PAGE_SIZE) | |
639 | page_length = PAGE_SIZE - page_offset; | |
640 | ||
641 | ret = fast_user_write (dev_priv->mm.gtt_mapping, page_base, | |
642 | page_offset, user_data, page_length); | |
643 | ||
644 | /* If we get a fault while copying data, then (presumably) our | |
3de09aa3 EA |
645 | * source page isn't available. Return the error and we'll |
646 | * retry in the slow path. | |
0839ccb8 | 647 | */ |
3de09aa3 EA |
648 | if (ret) |
649 | goto fail; | |
673a394b | 650 | |
0839ccb8 KP |
651 | remain -= page_length; |
652 | user_data += page_length; | |
653 | offset += page_length; | |
673a394b | 654 | } |
673a394b EA |
655 | |
656 | fail: | |
657 | i915_gem_object_unpin(obj); | |
658 | mutex_unlock(&dev->struct_mutex); | |
659 | ||
660 | return ret; | |
661 | } | |
662 | ||
3de09aa3 EA |
663 | /** |
664 | * This is the fallback GTT pwrite path, which uses get_user_pages to pin | |
665 | * the memory and maps it using kmap_atomic for copying. | |
666 | * | |
667 | * This code resulted in x11perf -rgb10text consuming about 10% more CPU | |
668 | * than using i915_gem_gtt_pwrite_fast on a G45 (32-bit). | |
669 | */ | |
3043c60c | 670 | static int |
3de09aa3 EA |
671 | i915_gem_gtt_pwrite_slow(struct drm_device *dev, struct drm_gem_object *obj, |
672 | struct drm_i915_gem_pwrite *args, | |
673 | struct drm_file *file_priv) | |
673a394b | 674 | { |
3de09aa3 EA |
675 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
676 | drm_i915_private_t *dev_priv = dev->dev_private; | |
677 | ssize_t remain; | |
678 | loff_t gtt_page_base, offset; | |
679 | loff_t first_data_page, last_data_page, num_pages; | |
680 | loff_t pinned_pages, i; | |
681 | struct page **user_pages; | |
682 | struct mm_struct *mm = current->mm; | |
683 | int gtt_page_offset, data_page_offset, data_page_index, page_length; | |
673a394b | 684 | int ret; |
3de09aa3 EA |
685 | uint64_t data_ptr = args->data_ptr; |
686 | ||
687 | remain = args->size; | |
688 | ||
689 | /* Pin the user pages containing the data. We can't fault while | |
690 | * holding the struct mutex, and all of the pwrite implementations | |
691 | * want to hold it while dereferencing the user data. | |
692 | */ | |
693 | first_data_page = data_ptr / PAGE_SIZE; | |
694 | last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; | |
695 | num_pages = last_data_page - first_data_page + 1; | |
696 | ||
8e7d2b2c | 697 | user_pages = drm_calloc_large(num_pages, sizeof(struct page *)); |
3de09aa3 EA |
698 | if (user_pages == NULL) |
699 | return -ENOMEM; | |
700 | ||
701 | down_read(&mm->mmap_sem); | |
702 | pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, | |
703 | num_pages, 0, 0, user_pages, NULL); | |
704 | up_read(&mm->mmap_sem); | |
705 | if (pinned_pages < num_pages) { | |
706 | ret = -EFAULT; | |
707 | goto out_unpin_pages; | |
708 | } | |
673a394b EA |
709 | |
710 | mutex_lock(&dev->struct_mutex); | |
3de09aa3 EA |
711 | ret = i915_gem_object_pin(obj, 0); |
712 | if (ret) | |
713 | goto out_unlock; | |
714 | ||
715 | ret = i915_gem_object_set_to_gtt_domain(obj, 1); | |
716 | if (ret) | |
717 | goto out_unpin_object; | |
718 | ||
719 | obj_priv = obj->driver_private; | |
720 | offset = obj_priv->gtt_offset + args->offset; | |
721 | ||
722 | while (remain > 0) { | |
723 | /* Operation in this page | |
724 | * | |
725 | * gtt_page_base = page offset within aperture | |
726 | * gtt_page_offset = offset within page in aperture | |
727 | * data_page_index = page number in get_user_pages return | |
728 | * data_page_offset = offset with data_page_index page. | |
729 | * page_length = bytes to copy for this page | |
730 | */ | |
731 | gtt_page_base = offset & PAGE_MASK; | |
732 | gtt_page_offset = offset & ~PAGE_MASK; | |
733 | data_page_index = data_ptr / PAGE_SIZE - first_data_page; | |
734 | data_page_offset = data_ptr & ~PAGE_MASK; | |
735 | ||
736 | page_length = remain; | |
737 | if ((gtt_page_offset + page_length) > PAGE_SIZE) | |
738 | page_length = PAGE_SIZE - gtt_page_offset; | |
739 | if ((data_page_offset + page_length) > PAGE_SIZE) | |
740 | page_length = PAGE_SIZE - data_page_offset; | |
741 | ||
742 | ret = slow_kernel_write(dev_priv->mm.gtt_mapping, | |
743 | gtt_page_base, gtt_page_offset, | |
744 | user_pages[data_page_index], | |
745 | data_page_offset, | |
746 | page_length); | |
747 | ||
748 | /* If we get a fault while copying data, then (presumably) our | |
749 | * source page isn't available. Return the error and we'll | |
750 | * retry in the slow path. | |
751 | */ | |
752 | if (ret) | |
753 | goto out_unpin_object; | |
754 | ||
755 | remain -= page_length; | |
756 | offset += page_length; | |
757 | data_ptr += page_length; | |
758 | } | |
759 | ||
760 | out_unpin_object: | |
761 | i915_gem_object_unpin(obj); | |
762 | out_unlock: | |
763 | mutex_unlock(&dev->struct_mutex); | |
764 | out_unpin_pages: | |
765 | for (i = 0; i < pinned_pages; i++) | |
766 | page_cache_release(user_pages[i]); | |
8e7d2b2c | 767 | drm_free_large(user_pages); |
3de09aa3 EA |
768 | |
769 | return ret; | |
770 | } | |
771 | ||
40123c1f EA |
772 | /** |
773 | * This is the fast shmem pwrite path, which attempts to directly | |
774 | * copy_from_user into the kmapped pages backing the object. | |
775 | */ | |
3043c60c | 776 | static int |
40123c1f EA |
777 | i915_gem_shmem_pwrite_fast(struct drm_device *dev, struct drm_gem_object *obj, |
778 | struct drm_i915_gem_pwrite *args, | |
779 | struct drm_file *file_priv) | |
673a394b | 780 | { |
40123c1f EA |
781 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
782 | ssize_t remain; | |
783 | loff_t offset, page_base; | |
784 | char __user *user_data; | |
785 | int page_offset, page_length; | |
673a394b | 786 | int ret; |
40123c1f EA |
787 | |
788 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
789 | remain = args->size; | |
673a394b EA |
790 | |
791 | mutex_lock(&dev->struct_mutex); | |
792 | ||
40123c1f EA |
793 | ret = i915_gem_object_get_pages(obj); |
794 | if (ret != 0) | |
795 | goto fail_unlock; | |
673a394b | 796 | |
e47c68e9 | 797 | ret = i915_gem_object_set_to_cpu_domain(obj, 1); |
40123c1f EA |
798 | if (ret != 0) |
799 | goto fail_put_pages; | |
800 | ||
801 | obj_priv = obj->driver_private; | |
802 | offset = args->offset; | |
803 | obj_priv->dirty = 1; | |
804 | ||
805 | while (remain > 0) { | |
806 | /* Operation in this page | |
807 | * | |
808 | * page_base = page offset within aperture | |
809 | * page_offset = offset within page | |
810 | * page_length = bytes to copy for this page | |
811 | */ | |
812 | page_base = (offset & ~(PAGE_SIZE-1)); | |
813 | page_offset = offset & (PAGE_SIZE-1); | |
814 | page_length = remain; | |
815 | if ((page_offset + remain) > PAGE_SIZE) | |
816 | page_length = PAGE_SIZE - page_offset; | |
817 | ||
818 | ret = fast_shmem_write(obj_priv->pages, | |
819 | page_base, page_offset, | |
820 | user_data, page_length); | |
821 | if (ret) | |
822 | goto fail_put_pages; | |
823 | ||
824 | remain -= page_length; | |
825 | user_data += page_length; | |
826 | offset += page_length; | |
827 | } | |
828 | ||
829 | fail_put_pages: | |
830 | i915_gem_object_put_pages(obj); | |
831 | fail_unlock: | |
832 | mutex_unlock(&dev->struct_mutex); | |
833 | ||
834 | return ret; | |
835 | } | |
836 | ||
837 | /** | |
838 | * This is the fallback shmem pwrite path, which uses get_user_pages to pin | |
839 | * the memory and maps it using kmap_atomic for copying. | |
840 | * | |
841 | * This avoids taking mmap_sem for faulting on the user's address while the | |
842 | * struct_mutex is held. | |
843 | */ | |
844 | static int | |
845 | i915_gem_shmem_pwrite_slow(struct drm_device *dev, struct drm_gem_object *obj, | |
846 | struct drm_i915_gem_pwrite *args, | |
847 | struct drm_file *file_priv) | |
848 | { | |
849 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
850 | struct mm_struct *mm = current->mm; | |
851 | struct page **user_pages; | |
852 | ssize_t remain; | |
853 | loff_t offset, pinned_pages, i; | |
854 | loff_t first_data_page, last_data_page, num_pages; | |
855 | int shmem_page_index, shmem_page_offset; | |
856 | int data_page_index, data_page_offset; | |
857 | int page_length; | |
858 | int ret; | |
859 | uint64_t data_ptr = args->data_ptr; | |
280b713b | 860 | int do_bit17_swizzling; |
40123c1f EA |
861 | |
862 | remain = args->size; | |
863 | ||
864 | /* Pin the user pages containing the data. We can't fault while | |
865 | * holding the struct mutex, and all of the pwrite implementations | |
866 | * want to hold it while dereferencing the user data. | |
867 | */ | |
868 | first_data_page = data_ptr / PAGE_SIZE; | |
869 | last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; | |
870 | num_pages = last_data_page - first_data_page + 1; | |
871 | ||
8e7d2b2c | 872 | user_pages = drm_calloc_large(num_pages, sizeof(struct page *)); |
40123c1f EA |
873 | if (user_pages == NULL) |
874 | return -ENOMEM; | |
875 | ||
876 | down_read(&mm->mmap_sem); | |
877 | pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, | |
878 | num_pages, 0, 0, user_pages, NULL); | |
879 | up_read(&mm->mmap_sem); | |
880 | if (pinned_pages < num_pages) { | |
881 | ret = -EFAULT; | |
882 | goto fail_put_user_pages; | |
673a394b EA |
883 | } |
884 | ||
280b713b EA |
885 | do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
886 | ||
40123c1f EA |
887 | mutex_lock(&dev->struct_mutex); |
888 | ||
07f73f69 CW |
889 | ret = i915_gem_object_get_pages_or_evict(obj); |
890 | if (ret) | |
40123c1f EA |
891 | goto fail_unlock; |
892 | ||
893 | ret = i915_gem_object_set_to_cpu_domain(obj, 1); | |
894 | if (ret != 0) | |
895 | goto fail_put_pages; | |
896 | ||
897 | obj_priv = obj->driver_private; | |
673a394b | 898 | offset = args->offset; |
40123c1f | 899 | obj_priv->dirty = 1; |
673a394b | 900 | |
40123c1f EA |
901 | while (remain > 0) { |
902 | /* Operation in this page | |
903 | * | |
904 | * shmem_page_index = page number within shmem file | |
905 | * shmem_page_offset = offset within page in shmem file | |
906 | * data_page_index = page number in get_user_pages return | |
907 | * data_page_offset = offset with data_page_index page. | |
908 | * page_length = bytes to copy for this page | |
909 | */ | |
910 | shmem_page_index = offset / PAGE_SIZE; | |
911 | shmem_page_offset = offset & ~PAGE_MASK; | |
912 | data_page_index = data_ptr / PAGE_SIZE - first_data_page; | |
913 | data_page_offset = data_ptr & ~PAGE_MASK; | |
914 | ||
915 | page_length = remain; | |
916 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
917 | page_length = PAGE_SIZE - shmem_page_offset; | |
918 | if ((data_page_offset + page_length) > PAGE_SIZE) | |
919 | page_length = PAGE_SIZE - data_page_offset; | |
920 | ||
280b713b EA |
921 | if (do_bit17_swizzling) { |
922 | ret = slow_shmem_bit17_copy(obj_priv->pages[shmem_page_index], | |
923 | shmem_page_offset, | |
924 | user_pages[data_page_index], | |
925 | data_page_offset, | |
926 | page_length, | |
927 | 0); | |
928 | } else { | |
929 | ret = slow_shmem_copy(obj_priv->pages[shmem_page_index], | |
930 | shmem_page_offset, | |
931 | user_pages[data_page_index], | |
932 | data_page_offset, | |
933 | page_length); | |
934 | } | |
40123c1f EA |
935 | if (ret) |
936 | goto fail_put_pages; | |
937 | ||
938 | remain -= page_length; | |
939 | data_ptr += page_length; | |
940 | offset += page_length; | |
673a394b EA |
941 | } |
942 | ||
40123c1f EA |
943 | fail_put_pages: |
944 | i915_gem_object_put_pages(obj); | |
945 | fail_unlock: | |
673a394b | 946 | mutex_unlock(&dev->struct_mutex); |
40123c1f EA |
947 | fail_put_user_pages: |
948 | for (i = 0; i < pinned_pages; i++) | |
949 | page_cache_release(user_pages[i]); | |
8e7d2b2c | 950 | drm_free_large(user_pages); |
673a394b | 951 | |
40123c1f | 952 | return ret; |
673a394b EA |
953 | } |
954 | ||
955 | /** | |
956 | * Writes data to the object referenced by handle. | |
957 | * | |
958 | * On error, the contents of the buffer that were to be modified are undefined. | |
959 | */ | |
960 | int | |
961 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, | |
962 | struct drm_file *file_priv) | |
963 | { | |
964 | struct drm_i915_gem_pwrite *args = data; | |
965 | struct drm_gem_object *obj; | |
966 | struct drm_i915_gem_object *obj_priv; | |
967 | int ret = 0; | |
968 | ||
969 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
970 | if (obj == NULL) | |
971 | return -EBADF; | |
972 | obj_priv = obj->driver_private; | |
973 | ||
974 | /* Bounds check destination. | |
975 | * | |
976 | * XXX: This could use review for overflow issues... | |
977 | */ | |
978 | if (args->offset > obj->size || args->size > obj->size || | |
979 | args->offset + args->size > obj->size) { | |
980 | drm_gem_object_unreference(obj); | |
981 | return -EINVAL; | |
982 | } | |
983 | ||
984 | /* We can only do the GTT pwrite on untiled buffers, as otherwise | |
985 | * it would end up going through the fenced access, and we'll get | |
986 | * different detiling behavior between reading and writing. | |
987 | * pread/pwrite currently are reading and writing from the CPU | |
988 | * perspective, requiring manual detiling by the client. | |
989 | */ | |
71acb5eb DA |
990 | if (obj_priv->phys_obj) |
991 | ret = i915_gem_phys_pwrite(dev, obj, args, file_priv); | |
992 | else if (obj_priv->tiling_mode == I915_TILING_NONE && | |
3de09aa3 EA |
993 | dev->gtt_total != 0) { |
994 | ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file_priv); | |
995 | if (ret == -EFAULT) { | |
996 | ret = i915_gem_gtt_pwrite_slow(dev, obj, args, | |
997 | file_priv); | |
998 | } | |
280b713b EA |
999 | } else if (i915_gem_object_needs_bit17_swizzle(obj)) { |
1000 | ret = i915_gem_shmem_pwrite_slow(dev, obj, args, file_priv); | |
40123c1f EA |
1001 | } else { |
1002 | ret = i915_gem_shmem_pwrite_fast(dev, obj, args, file_priv); | |
1003 | if (ret == -EFAULT) { | |
1004 | ret = i915_gem_shmem_pwrite_slow(dev, obj, args, | |
1005 | file_priv); | |
1006 | } | |
1007 | } | |
673a394b EA |
1008 | |
1009 | #if WATCH_PWRITE | |
1010 | if (ret) | |
1011 | DRM_INFO("pwrite failed %d\n", ret); | |
1012 | #endif | |
1013 | ||
1014 | drm_gem_object_unreference(obj); | |
1015 | ||
1016 | return ret; | |
1017 | } | |
1018 | ||
1019 | /** | |
2ef7eeaa EA |
1020 | * Called when user space prepares to use an object with the CPU, either |
1021 | * through the mmap ioctl's mapping or a GTT mapping. | |
673a394b EA |
1022 | */ |
1023 | int | |
1024 | i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, | |
1025 | struct drm_file *file_priv) | |
1026 | { | |
a09ba7fa | 1027 | struct drm_i915_private *dev_priv = dev->dev_private; |
673a394b EA |
1028 | struct drm_i915_gem_set_domain *args = data; |
1029 | struct drm_gem_object *obj; | |
652c393a | 1030 | struct drm_i915_gem_object *obj_priv; |
2ef7eeaa EA |
1031 | uint32_t read_domains = args->read_domains; |
1032 | uint32_t write_domain = args->write_domain; | |
673a394b EA |
1033 | int ret; |
1034 | ||
1035 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
1036 | return -ENODEV; | |
1037 | ||
2ef7eeaa | 1038 | /* Only handle setting domains to types used by the CPU. */ |
21d509e3 | 1039 | if (write_domain & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
1040 | return -EINVAL; |
1041 | ||
21d509e3 | 1042 | if (read_domains & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
1043 | return -EINVAL; |
1044 | ||
1045 | /* Having something in the write domain implies it's in the read | |
1046 | * domain, and only that read domain. Enforce that in the request. | |
1047 | */ | |
1048 | if (write_domain != 0 && read_domains != write_domain) | |
1049 | return -EINVAL; | |
1050 | ||
673a394b EA |
1051 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
1052 | if (obj == NULL) | |
1053 | return -EBADF; | |
652c393a | 1054 | obj_priv = obj->driver_private; |
673a394b EA |
1055 | |
1056 | mutex_lock(&dev->struct_mutex); | |
652c393a JB |
1057 | |
1058 | intel_mark_busy(dev, obj); | |
1059 | ||
673a394b | 1060 | #if WATCH_BUF |
cfd43c02 | 1061 | DRM_INFO("set_domain_ioctl %p(%zd), %08x %08x\n", |
2ef7eeaa | 1062 | obj, obj->size, read_domains, write_domain); |
673a394b | 1063 | #endif |
2ef7eeaa EA |
1064 | if (read_domains & I915_GEM_DOMAIN_GTT) { |
1065 | ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0); | |
02354392 | 1066 | |
a09ba7fa EA |
1067 | /* Update the LRU on the fence for the CPU access that's |
1068 | * about to occur. | |
1069 | */ | |
1070 | if (obj_priv->fence_reg != I915_FENCE_REG_NONE) { | |
1071 | list_move_tail(&obj_priv->fence_list, | |
1072 | &dev_priv->mm.fence_list); | |
1073 | } | |
1074 | ||
02354392 EA |
1075 | /* Silently promote "you're not bound, there was nothing to do" |
1076 | * to success, since the client was just asking us to | |
1077 | * make sure everything was done. | |
1078 | */ | |
1079 | if (ret == -EINVAL) | |
1080 | ret = 0; | |
2ef7eeaa | 1081 | } else { |
e47c68e9 | 1082 | ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0); |
2ef7eeaa EA |
1083 | } |
1084 | ||
673a394b EA |
1085 | drm_gem_object_unreference(obj); |
1086 | mutex_unlock(&dev->struct_mutex); | |
1087 | return ret; | |
1088 | } | |
1089 | ||
1090 | /** | |
1091 | * Called when user space has done writes to this buffer | |
1092 | */ | |
1093 | int | |
1094 | i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, | |
1095 | struct drm_file *file_priv) | |
1096 | { | |
1097 | struct drm_i915_gem_sw_finish *args = data; | |
1098 | struct drm_gem_object *obj; | |
1099 | struct drm_i915_gem_object *obj_priv; | |
1100 | int ret = 0; | |
1101 | ||
1102 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
1103 | return -ENODEV; | |
1104 | ||
1105 | mutex_lock(&dev->struct_mutex); | |
1106 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
1107 | if (obj == NULL) { | |
1108 | mutex_unlock(&dev->struct_mutex); | |
1109 | return -EBADF; | |
1110 | } | |
1111 | ||
1112 | #if WATCH_BUF | |
cfd43c02 | 1113 | DRM_INFO("%s: sw_finish %d (%p %zd)\n", |
673a394b EA |
1114 | __func__, args->handle, obj, obj->size); |
1115 | #endif | |
1116 | obj_priv = obj->driver_private; | |
1117 | ||
1118 | /* Pinned buffers may be scanout, so flush the cache */ | |
e47c68e9 EA |
1119 | if (obj_priv->pin_count) |
1120 | i915_gem_object_flush_cpu_write_domain(obj); | |
1121 | ||
673a394b EA |
1122 | drm_gem_object_unreference(obj); |
1123 | mutex_unlock(&dev->struct_mutex); | |
1124 | return ret; | |
1125 | } | |
1126 | ||
1127 | /** | |
1128 | * Maps the contents of an object, returning the address it is mapped | |
1129 | * into. | |
1130 | * | |
1131 | * While the mapping holds a reference on the contents of the object, it doesn't | |
1132 | * imply a ref on the object itself. | |
1133 | */ | |
1134 | int | |
1135 | i915_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
1136 | struct drm_file *file_priv) | |
1137 | { | |
1138 | struct drm_i915_gem_mmap *args = data; | |
1139 | struct drm_gem_object *obj; | |
1140 | loff_t offset; | |
1141 | unsigned long addr; | |
1142 | ||
1143 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
1144 | return -ENODEV; | |
1145 | ||
1146 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
1147 | if (obj == NULL) | |
1148 | return -EBADF; | |
1149 | ||
1150 | offset = args->offset; | |
1151 | ||
1152 | down_write(¤t->mm->mmap_sem); | |
1153 | addr = do_mmap(obj->filp, 0, args->size, | |
1154 | PROT_READ | PROT_WRITE, MAP_SHARED, | |
1155 | args->offset); | |
1156 | up_write(¤t->mm->mmap_sem); | |
1157 | mutex_lock(&dev->struct_mutex); | |
1158 | drm_gem_object_unreference(obj); | |
1159 | mutex_unlock(&dev->struct_mutex); | |
1160 | if (IS_ERR((void *)addr)) | |
1161 | return addr; | |
1162 | ||
1163 | args->addr_ptr = (uint64_t) addr; | |
1164 | ||
1165 | return 0; | |
1166 | } | |
1167 | ||
de151cf6 JB |
1168 | /** |
1169 | * i915_gem_fault - fault a page into the GTT | |
1170 | * vma: VMA in question | |
1171 | * vmf: fault info | |
1172 | * | |
1173 | * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped | |
1174 | * from userspace. The fault handler takes care of binding the object to | |
1175 | * the GTT (if needed), allocating and programming a fence register (again, | |
1176 | * only if needed based on whether the old reg is still valid or the object | |
1177 | * is tiled) and inserting a new PTE into the faulting process. | |
1178 | * | |
1179 | * Note that the faulting process may involve evicting existing objects | |
1180 | * from the GTT and/or fence registers to make room. So performance may | |
1181 | * suffer if the GTT working set is large or there are few fence registers | |
1182 | * left. | |
1183 | */ | |
1184 | int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1185 | { | |
1186 | struct drm_gem_object *obj = vma->vm_private_data; | |
1187 | struct drm_device *dev = obj->dev; | |
1188 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1189 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1190 | pgoff_t page_offset; | |
1191 | unsigned long pfn; | |
1192 | int ret = 0; | |
0f973f27 | 1193 | bool write = !!(vmf->flags & FAULT_FLAG_WRITE); |
de151cf6 JB |
1194 | |
1195 | /* We don't use vmf->pgoff since that has the fake offset */ | |
1196 | page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> | |
1197 | PAGE_SHIFT; | |
1198 | ||
1199 | /* Now bind it into the GTT if needed */ | |
1200 | mutex_lock(&dev->struct_mutex); | |
1201 | if (!obj_priv->gtt_space) { | |
e67b8ce1 | 1202 | ret = i915_gem_object_bind_to_gtt(obj, 0); |
de151cf6 JB |
1203 | if (ret) { |
1204 | mutex_unlock(&dev->struct_mutex); | |
1205 | return VM_FAULT_SIGBUS; | |
1206 | } | |
4960aaca | 1207 | list_add_tail(&obj_priv->list, &dev_priv->mm.inactive_list); |
07f4f3e8 KH |
1208 | |
1209 | ret = i915_gem_object_set_to_gtt_domain(obj, write); | |
1210 | if (ret) { | |
1211 | mutex_unlock(&dev->struct_mutex); | |
1212 | return VM_FAULT_SIGBUS; | |
1213 | } | |
de151cf6 JB |
1214 | } |
1215 | ||
1216 | /* Need a new fence register? */ | |
a09ba7fa | 1217 | if (obj_priv->tiling_mode != I915_TILING_NONE) { |
8c4b8c3f | 1218 | ret = i915_gem_object_get_fence_reg(obj); |
7d8d58b2 CW |
1219 | if (ret) { |
1220 | mutex_unlock(&dev->struct_mutex); | |
d9ddcb96 | 1221 | return VM_FAULT_SIGBUS; |
7d8d58b2 | 1222 | } |
d9ddcb96 | 1223 | } |
de151cf6 JB |
1224 | |
1225 | pfn = ((dev->agp->base + obj_priv->gtt_offset) >> PAGE_SHIFT) + | |
1226 | page_offset; | |
1227 | ||
1228 | /* Finally, remap it using the new GTT offset */ | |
1229 | ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn); | |
1230 | ||
1231 | mutex_unlock(&dev->struct_mutex); | |
1232 | ||
1233 | switch (ret) { | |
1234 | case -ENOMEM: | |
1235 | case -EAGAIN: | |
1236 | return VM_FAULT_OOM; | |
1237 | case -EFAULT: | |
959b887c | 1238 | case -EINVAL: |
de151cf6 JB |
1239 | return VM_FAULT_SIGBUS; |
1240 | default: | |
1241 | return VM_FAULT_NOPAGE; | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | /** | |
1246 | * i915_gem_create_mmap_offset - create a fake mmap offset for an object | |
1247 | * @obj: obj in question | |
1248 | * | |
1249 | * GEM memory mapping works by handing back to userspace a fake mmap offset | |
1250 | * it can use in a subsequent mmap(2) call. The DRM core code then looks | |
1251 | * up the object based on the offset and sets up the various memory mapping | |
1252 | * structures. | |
1253 | * | |
1254 | * This routine allocates and attaches a fake offset for @obj. | |
1255 | */ | |
1256 | static int | |
1257 | i915_gem_create_mmap_offset(struct drm_gem_object *obj) | |
1258 | { | |
1259 | struct drm_device *dev = obj->dev; | |
1260 | struct drm_gem_mm *mm = dev->mm_private; | |
1261 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1262 | struct drm_map_list *list; | |
f77d390c | 1263 | struct drm_local_map *map; |
de151cf6 JB |
1264 | int ret = 0; |
1265 | ||
1266 | /* Set the object up for mmap'ing */ | |
1267 | list = &obj->map_list; | |
9a298b2a | 1268 | list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL); |
de151cf6 JB |
1269 | if (!list->map) |
1270 | return -ENOMEM; | |
1271 | ||
1272 | map = list->map; | |
1273 | map->type = _DRM_GEM; | |
1274 | map->size = obj->size; | |
1275 | map->handle = obj; | |
1276 | ||
1277 | /* Get a DRM GEM mmap offset allocated... */ | |
1278 | list->file_offset_node = drm_mm_search_free(&mm->offset_manager, | |
1279 | obj->size / PAGE_SIZE, 0, 0); | |
1280 | if (!list->file_offset_node) { | |
1281 | DRM_ERROR("failed to allocate offset for bo %d\n", obj->name); | |
1282 | ret = -ENOMEM; | |
1283 | goto out_free_list; | |
1284 | } | |
1285 | ||
1286 | list->file_offset_node = drm_mm_get_block(list->file_offset_node, | |
1287 | obj->size / PAGE_SIZE, 0); | |
1288 | if (!list->file_offset_node) { | |
1289 | ret = -ENOMEM; | |
1290 | goto out_free_list; | |
1291 | } | |
1292 | ||
1293 | list->hash.key = list->file_offset_node->start; | |
1294 | if (drm_ht_insert_item(&mm->offset_hash, &list->hash)) { | |
1295 | DRM_ERROR("failed to add to map hash\n"); | |
1296 | goto out_free_mm; | |
1297 | } | |
1298 | ||
1299 | /* By now we should be all set, any drm_mmap request on the offset | |
1300 | * below will get to our mmap & fault handler */ | |
1301 | obj_priv->mmap_offset = ((uint64_t) list->hash.key) << PAGE_SHIFT; | |
1302 | ||
1303 | return 0; | |
1304 | ||
1305 | out_free_mm: | |
1306 | drm_mm_put_block(list->file_offset_node); | |
1307 | out_free_list: | |
9a298b2a | 1308 | kfree(list->map); |
de151cf6 JB |
1309 | |
1310 | return ret; | |
1311 | } | |
1312 | ||
901782b2 CW |
1313 | /** |
1314 | * i915_gem_release_mmap - remove physical page mappings | |
1315 | * @obj: obj in question | |
1316 | * | |
1317 | * Preserve the reservation of the mmaping with the DRM core code, but | |
1318 | * relinquish ownership of the pages back to the system. | |
1319 | * | |
1320 | * It is vital that we remove the page mapping if we have mapped a tiled | |
1321 | * object through the GTT and then lose the fence register due to | |
1322 | * resource pressure. Similarly if the object has been moved out of the | |
1323 | * aperture, than pages mapped into userspace must be revoked. Removing the | |
1324 | * mapping will then trigger a page fault on the next user access, allowing | |
1325 | * fixup by i915_gem_fault(). | |
1326 | */ | |
d05ca301 | 1327 | void |
901782b2 CW |
1328 | i915_gem_release_mmap(struct drm_gem_object *obj) |
1329 | { | |
1330 | struct drm_device *dev = obj->dev; | |
1331 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1332 | ||
1333 | if (dev->dev_mapping) | |
1334 | unmap_mapping_range(dev->dev_mapping, | |
1335 | obj_priv->mmap_offset, obj->size, 1); | |
1336 | } | |
1337 | ||
ab00b3e5 JB |
1338 | static void |
1339 | i915_gem_free_mmap_offset(struct drm_gem_object *obj) | |
1340 | { | |
1341 | struct drm_device *dev = obj->dev; | |
1342 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1343 | struct drm_gem_mm *mm = dev->mm_private; | |
1344 | struct drm_map_list *list; | |
1345 | ||
1346 | list = &obj->map_list; | |
1347 | drm_ht_remove_item(&mm->offset_hash, &list->hash); | |
1348 | ||
1349 | if (list->file_offset_node) { | |
1350 | drm_mm_put_block(list->file_offset_node); | |
1351 | list->file_offset_node = NULL; | |
1352 | } | |
1353 | ||
1354 | if (list->map) { | |
9a298b2a | 1355 | kfree(list->map); |
ab00b3e5 JB |
1356 | list->map = NULL; |
1357 | } | |
1358 | ||
1359 | obj_priv->mmap_offset = 0; | |
1360 | } | |
1361 | ||
de151cf6 JB |
1362 | /** |
1363 | * i915_gem_get_gtt_alignment - return required GTT alignment for an object | |
1364 | * @obj: object to check | |
1365 | * | |
1366 | * Return the required GTT alignment for an object, taking into account | |
1367 | * potential fence register mapping if needed. | |
1368 | */ | |
1369 | static uint32_t | |
1370 | i915_gem_get_gtt_alignment(struct drm_gem_object *obj) | |
1371 | { | |
1372 | struct drm_device *dev = obj->dev; | |
1373 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1374 | int start, i; | |
1375 | ||
1376 | /* | |
1377 | * Minimum alignment is 4k (GTT page size), but might be greater | |
1378 | * if a fence register is needed for the object. | |
1379 | */ | |
1380 | if (IS_I965G(dev) || obj_priv->tiling_mode == I915_TILING_NONE) | |
1381 | return 4096; | |
1382 | ||
1383 | /* | |
1384 | * Previous chips need to be aligned to the size of the smallest | |
1385 | * fence register that can contain the object. | |
1386 | */ | |
1387 | if (IS_I9XX(dev)) | |
1388 | start = 1024*1024; | |
1389 | else | |
1390 | start = 512*1024; | |
1391 | ||
1392 | for (i = start; i < obj->size; i <<= 1) | |
1393 | ; | |
1394 | ||
1395 | return i; | |
1396 | } | |
1397 | ||
1398 | /** | |
1399 | * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing | |
1400 | * @dev: DRM device | |
1401 | * @data: GTT mapping ioctl data | |
1402 | * @file_priv: GEM object info | |
1403 | * | |
1404 | * Simply returns the fake offset to userspace so it can mmap it. | |
1405 | * The mmap call will end up in drm_gem_mmap(), which will set things | |
1406 | * up so we can get faults in the handler above. | |
1407 | * | |
1408 | * The fault handler will take care of binding the object into the GTT | |
1409 | * (since it may have been evicted to make room for something), allocating | |
1410 | * a fence register, and mapping the appropriate aperture address into | |
1411 | * userspace. | |
1412 | */ | |
1413 | int | |
1414 | i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, | |
1415 | struct drm_file *file_priv) | |
1416 | { | |
1417 | struct drm_i915_gem_mmap_gtt *args = data; | |
1418 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1419 | struct drm_gem_object *obj; | |
1420 | struct drm_i915_gem_object *obj_priv; | |
1421 | int ret; | |
1422 | ||
1423 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
1424 | return -ENODEV; | |
1425 | ||
1426 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
1427 | if (obj == NULL) | |
1428 | return -EBADF; | |
1429 | ||
1430 | mutex_lock(&dev->struct_mutex); | |
1431 | ||
1432 | obj_priv = obj->driver_private; | |
1433 | ||
1434 | if (!obj_priv->mmap_offset) { | |
1435 | ret = i915_gem_create_mmap_offset(obj); | |
13af1062 CW |
1436 | if (ret) { |
1437 | drm_gem_object_unreference(obj); | |
1438 | mutex_unlock(&dev->struct_mutex); | |
de151cf6 | 1439 | return ret; |
13af1062 | 1440 | } |
de151cf6 JB |
1441 | } |
1442 | ||
1443 | args->offset = obj_priv->mmap_offset; | |
1444 | ||
de151cf6 JB |
1445 | /* |
1446 | * Pull it into the GTT so that we have a page list (makes the | |
1447 | * initial fault faster and any subsequent flushing possible). | |
1448 | */ | |
1449 | if (!obj_priv->agp_mem) { | |
e67b8ce1 | 1450 | ret = i915_gem_object_bind_to_gtt(obj, 0); |
de151cf6 JB |
1451 | if (ret) { |
1452 | drm_gem_object_unreference(obj); | |
1453 | mutex_unlock(&dev->struct_mutex); | |
1454 | return ret; | |
1455 | } | |
14b60391 | 1456 | list_add_tail(&obj_priv->list, &dev_priv->mm.inactive_list); |
de151cf6 JB |
1457 | } |
1458 | ||
1459 | drm_gem_object_unreference(obj); | |
1460 | mutex_unlock(&dev->struct_mutex); | |
1461 | ||
1462 | return 0; | |
1463 | } | |
1464 | ||
6911a9b8 | 1465 | void |
856fa198 | 1466 | i915_gem_object_put_pages(struct drm_gem_object *obj) |
673a394b EA |
1467 | { |
1468 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1469 | int page_count = obj->size / PAGE_SIZE; | |
1470 | int i; | |
1471 | ||
856fa198 | 1472 | BUG_ON(obj_priv->pages_refcount == 0); |
673a394b | 1473 | |
856fa198 EA |
1474 | if (--obj_priv->pages_refcount != 0) |
1475 | return; | |
673a394b | 1476 | |
280b713b EA |
1477 | if (obj_priv->tiling_mode != I915_TILING_NONE) |
1478 | i915_gem_object_save_bit_17_swizzle(obj); | |
1479 | ||
3ef94daa CW |
1480 | if (obj_priv->madv == I915_MADV_DONTNEED) |
1481 | obj_priv->dirty = 0; | |
1482 | ||
1483 | for (i = 0; i < page_count; i++) { | |
1484 | if (obj_priv->pages[i] == NULL) | |
1485 | break; | |
1486 | ||
1487 | if (obj_priv->dirty) | |
1488 | set_page_dirty(obj_priv->pages[i]); | |
1489 | ||
1490 | if (obj_priv->madv == I915_MADV_WILLNEED) | |
1491 | mark_page_accessed(obj_priv->pages[i]); | |
1492 | ||
1493 | page_cache_release(obj_priv->pages[i]); | |
1494 | } | |
673a394b EA |
1495 | obj_priv->dirty = 0; |
1496 | ||
8e7d2b2c | 1497 | drm_free_large(obj_priv->pages); |
856fa198 | 1498 | obj_priv->pages = NULL; |
673a394b EA |
1499 | } |
1500 | ||
1501 | static void | |
ce44b0ea | 1502 | i915_gem_object_move_to_active(struct drm_gem_object *obj, uint32_t seqno) |
673a394b EA |
1503 | { |
1504 | struct drm_device *dev = obj->dev; | |
1505 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1506 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1507 | ||
1508 | /* Add a reference if we're newly entering the active list. */ | |
1509 | if (!obj_priv->active) { | |
1510 | drm_gem_object_reference(obj); | |
1511 | obj_priv->active = 1; | |
1512 | } | |
1513 | /* Move from whatever list we were on to the tail of execution. */ | |
5e118f41 | 1514 | spin_lock(&dev_priv->mm.active_list_lock); |
673a394b EA |
1515 | list_move_tail(&obj_priv->list, |
1516 | &dev_priv->mm.active_list); | |
5e118f41 | 1517 | spin_unlock(&dev_priv->mm.active_list_lock); |
ce44b0ea | 1518 | obj_priv->last_rendering_seqno = seqno; |
673a394b EA |
1519 | } |
1520 | ||
ce44b0ea EA |
1521 | static void |
1522 | i915_gem_object_move_to_flushing(struct drm_gem_object *obj) | |
1523 | { | |
1524 | struct drm_device *dev = obj->dev; | |
1525 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1526 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1527 | ||
1528 | BUG_ON(!obj_priv->active); | |
1529 | list_move_tail(&obj_priv->list, &dev_priv->mm.flushing_list); | |
1530 | obj_priv->last_rendering_seqno = 0; | |
1531 | } | |
673a394b EA |
1532 | |
1533 | static void | |
1534 | i915_gem_object_move_to_inactive(struct drm_gem_object *obj) | |
1535 | { | |
1536 | struct drm_device *dev = obj->dev; | |
1537 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1538 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1539 | ||
1540 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1541 | if (obj_priv->pin_count != 0) | |
1542 | list_del_init(&obj_priv->list); | |
1543 | else | |
1544 | list_move_tail(&obj_priv->list, &dev_priv->mm.inactive_list); | |
1545 | ||
ce44b0ea | 1546 | obj_priv->last_rendering_seqno = 0; |
673a394b EA |
1547 | if (obj_priv->active) { |
1548 | obj_priv->active = 0; | |
1549 | drm_gem_object_unreference(obj); | |
1550 | } | |
1551 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1552 | } | |
1553 | ||
1554 | /** | |
1555 | * Creates a new sequence number, emitting a write of it to the status page | |
1556 | * plus an interrupt, which will trigger i915_user_interrupt_handler. | |
1557 | * | |
1558 | * Must be called with struct_lock held. | |
1559 | * | |
1560 | * Returned sequence numbers are nonzero on success. | |
1561 | */ | |
1562 | static uint32_t | |
b962442e EA |
1563 | i915_add_request(struct drm_device *dev, struct drm_file *file_priv, |
1564 | uint32_t flush_domains) | |
673a394b EA |
1565 | { |
1566 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b962442e | 1567 | struct drm_i915_file_private *i915_file_priv = NULL; |
673a394b EA |
1568 | struct drm_i915_gem_request *request; |
1569 | uint32_t seqno; | |
1570 | int was_empty; | |
1571 | RING_LOCALS; | |
1572 | ||
b962442e EA |
1573 | if (file_priv != NULL) |
1574 | i915_file_priv = file_priv->driver_priv; | |
1575 | ||
9a298b2a | 1576 | request = kzalloc(sizeof(*request), GFP_KERNEL); |
673a394b EA |
1577 | if (request == NULL) |
1578 | return 0; | |
1579 | ||
1580 | /* Grab the seqno we're going to make this request be, and bump the | |
1581 | * next (skipping 0 so it can be the reserved no-seqno value). | |
1582 | */ | |
1583 | seqno = dev_priv->mm.next_gem_seqno; | |
1584 | dev_priv->mm.next_gem_seqno++; | |
1585 | if (dev_priv->mm.next_gem_seqno == 0) | |
1586 | dev_priv->mm.next_gem_seqno++; | |
1587 | ||
1588 | BEGIN_LP_RING(4); | |
1589 | OUT_RING(MI_STORE_DWORD_INDEX); | |
1590 | OUT_RING(I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); | |
1591 | OUT_RING(seqno); | |
1592 | ||
1593 | OUT_RING(MI_USER_INTERRUPT); | |
1594 | ADVANCE_LP_RING(); | |
1595 | ||
1596 | DRM_DEBUG("%d\n", seqno); | |
1597 | ||
1598 | request->seqno = seqno; | |
1599 | request->emitted_jiffies = jiffies; | |
673a394b EA |
1600 | was_empty = list_empty(&dev_priv->mm.request_list); |
1601 | list_add_tail(&request->list, &dev_priv->mm.request_list); | |
b962442e EA |
1602 | if (i915_file_priv) { |
1603 | list_add_tail(&request->client_list, | |
1604 | &i915_file_priv->mm.request_list); | |
1605 | } else { | |
1606 | INIT_LIST_HEAD(&request->client_list); | |
1607 | } | |
673a394b | 1608 | |
ce44b0ea EA |
1609 | /* Associate any objects on the flushing list matching the write |
1610 | * domain we're flushing with our flush. | |
1611 | */ | |
1612 | if (flush_domains != 0) { | |
1613 | struct drm_i915_gem_object *obj_priv, *next; | |
1614 | ||
1615 | list_for_each_entry_safe(obj_priv, next, | |
1616 | &dev_priv->mm.flushing_list, list) { | |
1617 | struct drm_gem_object *obj = obj_priv->obj; | |
1618 | ||
1619 | if ((obj->write_domain & flush_domains) == | |
1620 | obj->write_domain) { | |
1621 | obj->write_domain = 0; | |
1622 | i915_gem_object_move_to_active(obj, seqno); | |
1623 | } | |
1624 | } | |
1625 | ||
1626 | } | |
1627 | ||
f65d9421 BG |
1628 | if (!dev_priv->mm.suspended) { |
1629 | mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); | |
1630 | if (was_empty) | |
1631 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); | |
1632 | } | |
673a394b EA |
1633 | return seqno; |
1634 | } | |
1635 | ||
1636 | /** | |
1637 | * Command execution barrier | |
1638 | * | |
1639 | * Ensures that all commands in the ring are finished | |
1640 | * before signalling the CPU | |
1641 | */ | |
3043c60c | 1642 | static uint32_t |
673a394b EA |
1643 | i915_retire_commands(struct drm_device *dev) |
1644 | { | |
1645 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1646 | uint32_t cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; | |
1647 | uint32_t flush_domains = 0; | |
1648 | RING_LOCALS; | |
1649 | ||
1650 | /* The sampler always gets flushed on i965 (sigh) */ | |
1651 | if (IS_I965G(dev)) | |
1652 | flush_domains |= I915_GEM_DOMAIN_SAMPLER; | |
1653 | BEGIN_LP_RING(2); | |
1654 | OUT_RING(cmd); | |
1655 | OUT_RING(0); /* noop */ | |
1656 | ADVANCE_LP_RING(); | |
1657 | return flush_domains; | |
1658 | } | |
1659 | ||
1660 | /** | |
1661 | * Moves buffers associated only with the given active seqno from the active | |
1662 | * to inactive list, potentially freeing them. | |
1663 | */ | |
1664 | static void | |
1665 | i915_gem_retire_request(struct drm_device *dev, | |
1666 | struct drm_i915_gem_request *request) | |
1667 | { | |
1668 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1669 | ||
1670 | /* Move any buffers on the active list that are no longer referenced | |
1671 | * by the ringbuffer to the flushing/inactive lists as appropriate. | |
1672 | */ | |
5e118f41 | 1673 | spin_lock(&dev_priv->mm.active_list_lock); |
673a394b EA |
1674 | while (!list_empty(&dev_priv->mm.active_list)) { |
1675 | struct drm_gem_object *obj; | |
1676 | struct drm_i915_gem_object *obj_priv; | |
1677 | ||
1678 | obj_priv = list_first_entry(&dev_priv->mm.active_list, | |
1679 | struct drm_i915_gem_object, | |
1680 | list); | |
1681 | obj = obj_priv->obj; | |
1682 | ||
1683 | /* If the seqno being retired doesn't match the oldest in the | |
1684 | * list, then the oldest in the list must still be newer than | |
1685 | * this seqno. | |
1686 | */ | |
1687 | if (obj_priv->last_rendering_seqno != request->seqno) | |
5e118f41 | 1688 | goto out; |
de151cf6 | 1689 | |
673a394b EA |
1690 | #if WATCH_LRU |
1691 | DRM_INFO("%s: retire %d moves to inactive list %p\n", | |
1692 | __func__, request->seqno, obj); | |
1693 | #endif | |
1694 | ||
ce44b0ea EA |
1695 | if (obj->write_domain != 0) |
1696 | i915_gem_object_move_to_flushing(obj); | |
68c84342 SL |
1697 | else { |
1698 | /* Take a reference on the object so it won't be | |
1699 | * freed while the spinlock is held. The list | |
1700 | * protection for this spinlock is safe when breaking | |
1701 | * the lock like this since the next thing we do | |
1702 | * is just get the head of the list again. | |
1703 | */ | |
1704 | drm_gem_object_reference(obj); | |
673a394b | 1705 | i915_gem_object_move_to_inactive(obj); |
68c84342 SL |
1706 | spin_unlock(&dev_priv->mm.active_list_lock); |
1707 | drm_gem_object_unreference(obj); | |
1708 | spin_lock(&dev_priv->mm.active_list_lock); | |
1709 | } | |
673a394b | 1710 | } |
5e118f41 CW |
1711 | out: |
1712 | spin_unlock(&dev_priv->mm.active_list_lock); | |
673a394b EA |
1713 | } |
1714 | ||
1715 | /** | |
1716 | * Returns true if seq1 is later than seq2. | |
1717 | */ | |
22be1724 | 1718 | bool |
673a394b EA |
1719 | i915_seqno_passed(uint32_t seq1, uint32_t seq2) |
1720 | { | |
1721 | return (int32_t)(seq1 - seq2) >= 0; | |
1722 | } | |
1723 | ||
1724 | uint32_t | |
1725 | i915_get_gem_seqno(struct drm_device *dev) | |
1726 | { | |
1727 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1728 | ||
1729 | return READ_HWSP(dev_priv, I915_GEM_HWS_INDEX); | |
1730 | } | |
1731 | ||
1732 | /** | |
1733 | * This function clears the request list as sequence numbers are passed. | |
1734 | */ | |
1735 | void | |
1736 | i915_gem_retire_requests(struct drm_device *dev) | |
1737 | { | |
1738 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1739 | uint32_t seqno; | |
1740 | ||
6c0594a3 KW |
1741 | if (!dev_priv->hw_status_page) |
1742 | return; | |
1743 | ||
673a394b EA |
1744 | seqno = i915_get_gem_seqno(dev); |
1745 | ||
1746 | while (!list_empty(&dev_priv->mm.request_list)) { | |
1747 | struct drm_i915_gem_request *request; | |
1748 | uint32_t retiring_seqno; | |
1749 | ||
1750 | request = list_first_entry(&dev_priv->mm.request_list, | |
1751 | struct drm_i915_gem_request, | |
1752 | list); | |
1753 | retiring_seqno = request->seqno; | |
1754 | ||
1755 | if (i915_seqno_passed(seqno, retiring_seqno) || | |
ba1234d1 | 1756 | atomic_read(&dev_priv->mm.wedged)) { |
673a394b EA |
1757 | i915_gem_retire_request(dev, request); |
1758 | ||
1759 | list_del(&request->list); | |
b962442e | 1760 | list_del(&request->client_list); |
9a298b2a | 1761 | kfree(request); |
673a394b EA |
1762 | } else |
1763 | break; | |
1764 | } | |
1765 | } | |
1766 | ||
1767 | void | |
1768 | i915_gem_retire_work_handler(struct work_struct *work) | |
1769 | { | |
1770 | drm_i915_private_t *dev_priv; | |
1771 | struct drm_device *dev; | |
1772 | ||
1773 | dev_priv = container_of(work, drm_i915_private_t, | |
1774 | mm.retire_work.work); | |
1775 | dev = dev_priv->dev; | |
1776 | ||
1777 | mutex_lock(&dev->struct_mutex); | |
1778 | i915_gem_retire_requests(dev); | |
6dbe2772 KP |
1779 | if (!dev_priv->mm.suspended && |
1780 | !list_empty(&dev_priv->mm.request_list)) | |
9c9fe1f8 | 1781 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); |
673a394b EA |
1782 | mutex_unlock(&dev->struct_mutex); |
1783 | } | |
1784 | ||
1785 | /** | |
1786 | * Waits for a sequence number to be signaled, and cleans up the | |
1787 | * request and object lists appropriately for that event. | |
1788 | */ | |
3043c60c | 1789 | static int |
673a394b EA |
1790 | i915_wait_request(struct drm_device *dev, uint32_t seqno) |
1791 | { | |
1792 | drm_i915_private_t *dev_priv = dev->dev_private; | |
802c7eb6 | 1793 | u32 ier; |
673a394b EA |
1794 | int ret = 0; |
1795 | ||
1796 | BUG_ON(seqno == 0); | |
1797 | ||
ba1234d1 | 1798 | if (atomic_read(&dev_priv->mm.wedged)) |
ffed1d09 BG |
1799 | return -EIO; |
1800 | ||
673a394b | 1801 | if (!i915_seqno_passed(i915_get_gem_seqno(dev), seqno)) { |
036a4a7d ZW |
1802 | if (IS_IGDNG(dev)) |
1803 | ier = I915_READ(DEIER) | I915_READ(GTIER); | |
1804 | else | |
1805 | ier = I915_READ(IER); | |
802c7eb6 JB |
1806 | if (!ier) { |
1807 | DRM_ERROR("something (likely vbetool) disabled " | |
1808 | "interrupts, re-enabling\n"); | |
1809 | i915_driver_irq_preinstall(dev); | |
1810 | i915_driver_irq_postinstall(dev); | |
1811 | } | |
1812 | ||
673a394b EA |
1813 | dev_priv->mm.waiting_gem_seqno = seqno; |
1814 | i915_user_irq_get(dev); | |
1815 | ret = wait_event_interruptible(dev_priv->irq_queue, | |
1816 | i915_seqno_passed(i915_get_gem_seqno(dev), | |
1817 | seqno) || | |
ba1234d1 | 1818 | atomic_read(&dev_priv->mm.wedged)); |
673a394b EA |
1819 | i915_user_irq_put(dev); |
1820 | dev_priv->mm.waiting_gem_seqno = 0; | |
1821 | } | |
ba1234d1 | 1822 | if (atomic_read(&dev_priv->mm.wedged)) |
673a394b EA |
1823 | ret = -EIO; |
1824 | ||
1825 | if (ret && ret != -ERESTARTSYS) | |
1826 | DRM_ERROR("%s returns %d (awaiting %d at %d)\n", | |
1827 | __func__, ret, seqno, i915_get_gem_seqno(dev)); | |
1828 | ||
1829 | /* Directly dispatch request retiring. While we have the work queue | |
1830 | * to handle this, the waiter on a request often wants an associated | |
1831 | * buffer to have made it to the inactive list, and we would need | |
1832 | * a separate wait queue to handle that. | |
1833 | */ | |
1834 | if (ret == 0) | |
1835 | i915_gem_retire_requests(dev); | |
1836 | ||
1837 | return ret; | |
1838 | } | |
1839 | ||
1840 | static void | |
1841 | i915_gem_flush(struct drm_device *dev, | |
1842 | uint32_t invalidate_domains, | |
1843 | uint32_t flush_domains) | |
1844 | { | |
1845 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1846 | uint32_t cmd; | |
1847 | RING_LOCALS; | |
1848 | ||
1849 | #if WATCH_EXEC | |
1850 | DRM_INFO("%s: invalidate %08x flush %08x\n", __func__, | |
1851 | invalidate_domains, flush_domains); | |
1852 | #endif | |
1853 | ||
1854 | if (flush_domains & I915_GEM_DOMAIN_CPU) | |
1855 | drm_agp_chipset_flush(dev); | |
1856 | ||
21d509e3 | 1857 | if ((invalidate_domains | flush_domains) & I915_GEM_GPU_DOMAINS) { |
673a394b EA |
1858 | /* |
1859 | * read/write caches: | |
1860 | * | |
1861 | * I915_GEM_DOMAIN_RENDER is always invalidated, but is | |
1862 | * only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is | |
1863 | * also flushed at 2d versus 3d pipeline switches. | |
1864 | * | |
1865 | * read-only caches: | |
1866 | * | |
1867 | * I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if | |
1868 | * MI_READ_FLUSH is set, and is always flushed on 965. | |
1869 | * | |
1870 | * I915_GEM_DOMAIN_COMMAND may not exist? | |
1871 | * | |
1872 | * I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is | |
1873 | * invalidated when MI_EXE_FLUSH is set. | |
1874 | * | |
1875 | * I915_GEM_DOMAIN_VERTEX, which exists on 965, is | |
1876 | * invalidated with every MI_FLUSH. | |
1877 | * | |
1878 | * TLBs: | |
1879 | * | |
1880 | * On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND | |
1881 | * and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and | |
1882 | * I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER | |
1883 | * are flushed at any MI_FLUSH. | |
1884 | */ | |
1885 | ||
1886 | cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; | |
1887 | if ((invalidate_domains|flush_domains) & | |
1888 | I915_GEM_DOMAIN_RENDER) | |
1889 | cmd &= ~MI_NO_WRITE_FLUSH; | |
1890 | if (!IS_I965G(dev)) { | |
1891 | /* | |
1892 | * On the 965, the sampler cache always gets flushed | |
1893 | * and this bit is reserved. | |
1894 | */ | |
1895 | if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER) | |
1896 | cmd |= MI_READ_FLUSH; | |
1897 | } | |
1898 | if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION) | |
1899 | cmd |= MI_EXE_FLUSH; | |
1900 | ||
1901 | #if WATCH_EXEC | |
1902 | DRM_INFO("%s: queue flush %08x to ring\n", __func__, cmd); | |
1903 | #endif | |
1904 | BEGIN_LP_RING(2); | |
1905 | OUT_RING(cmd); | |
1906 | OUT_RING(0); /* noop */ | |
1907 | ADVANCE_LP_RING(); | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | /** | |
1912 | * Ensures that all rendering to the object has completed and the object is | |
1913 | * safe to unbind from the GTT or access from the CPU. | |
1914 | */ | |
1915 | static int | |
1916 | i915_gem_object_wait_rendering(struct drm_gem_object *obj) | |
1917 | { | |
1918 | struct drm_device *dev = obj->dev; | |
1919 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1920 | int ret; | |
1921 | ||
e47c68e9 EA |
1922 | /* This function only exists to support waiting for existing rendering, |
1923 | * not for emitting required flushes. | |
673a394b | 1924 | */ |
e47c68e9 | 1925 | BUG_ON((obj->write_domain & I915_GEM_GPU_DOMAINS) != 0); |
673a394b EA |
1926 | |
1927 | /* If there is rendering queued on the buffer being evicted, wait for | |
1928 | * it. | |
1929 | */ | |
1930 | if (obj_priv->active) { | |
1931 | #if WATCH_BUF | |
1932 | DRM_INFO("%s: object %p wait for seqno %08x\n", | |
1933 | __func__, obj, obj_priv->last_rendering_seqno); | |
1934 | #endif | |
1935 | ret = i915_wait_request(dev, obj_priv->last_rendering_seqno); | |
1936 | if (ret != 0) | |
1937 | return ret; | |
1938 | } | |
1939 | ||
1940 | return 0; | |
1941 | } | |
1942 | ||
1943 | /** | |
1944 | * Unbinds an object from the GTT aperture. | |
1945 | */ | |
0f973f27 | 1946 | int |
673a394b EA |
1947 | i915_gem_object_unbind(struct drm_gem_object *obj) |
1948 | { | |
1949 | struct drm_device *dev = obj->dev; | |
1950 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1951 | int ret = 0; | |
1952 | ||
1953 | #if WATCH_BUF | |
1954 | DRM_INFO("%s:%d %p\n", __func__, __LINE__, obj); | |
1955 | DRM_INFO("gtt_space %p\n", obj_priv->gtt_space); | |
1956 | #endif | |
1957 | if (obj_priv->gtt_space == NULL) | |
1958 | return 0; | |
1959 | ||
1960 | if (obj_priv->pin_count != 0) { | |
1961 | DRM_ERROR("Attempting to unbind pinned buffer\n"); | |
1962 | return -EINVAL; | |
1963 | } | |
1964 | ||
5323fd04 EA |
1965 | /* blow away mappings if mapped through GTT */ |
1966 | i915_gem_release_mmap(obj); | |
1967 | ||
1968 | if (obj_priv->fence_reg != I915_FENCE_REG_NONE) | |
1969 | i915_gem_clear_fence_reg(obj); | |
1970 | ||
673a394b EA |
1971 | /* Move the object to the CPU domain to ensure that |
1972 | * any possible CPU writes while it's not in the GTT | |
1973 | * are flushed when we go to remap it. This will | |
1974 | * also ensure that all pending GPU writes are finished | |
1975 | * before we unbind. | |
1976 | */ | |
e47c68e9 | 1977 | ret = i915_gem_object_set_to_cpu_domain(obj, 1); |
673a394b | 1978 | if (ret) { |
e47c68e9 EA |
1979 | if (ret != -ERESTARTSYS) |
1980 | DRM_ERROR("set_domain failed: %d\n", ret); | |
673a394b EA |
1981 | return ret; |
1982 | } | |
1983 | ||
5323fd04 EA |
1984 | BUG_ON(obj_priv->active); |
1985 | ||
673a394b EA |
1986 | if (obj_priv->agp_mem != NULL) { |
1987 | drm_unbind_agp(obj_priv->agp_mem); | |
1988 | drm_free_agp(obj_priv->agp_mem, obj->size / PAGE_SIZE); | |
1989 | obj_priv->agp_mem = NULL; | |
1990 | } | |
1991 | ||
856fa198 | 1992 | i915_gem_object_put_pages(obj); |
673a394b EA |
1993 | |
1994 | if (obj_priv->gtt_space) { | |
1995 | atomic_dec(&dev->gtt_count); | |
1996 | atomic_sub(obj->size, &dev->gtt_memory); | |
1997 | ||
1998 | drm_mm_put_block(obj_priv->gtt_space); | |
1999 | obj_priv->gtt_space = NULL; | |
2000 | } | |
2001 | ||
2002 | /* Remove ourselves from the LRU list if present. */ | |
2003 | if (!list_empty(&obj_priv->list)) | |
2004 | list_del_init(&obj_priv->list); | |
2005 | ||
2006 | return 0; | |
2007 | } | |
2008 | ||
07f73f69 CW |
2009 | static inline int |
2010 | i915_gem_object_is_purgeable(struct drm_i915_gem_object *obj_priv) | |
2011 | { | |
2012 | return !obj_priv->dirty || obj_priv->madv == I915_MADV_DONTNEED; | |
2013 | } | |
2014 | ||
2015 | static struct drm_gem_object * | |
2016 | i915_gem_find_inactive_object(struct drm_device *dev, int min_size) | |
2017 | { | |
2018 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2019 | struct drm_i915_gem_object *obj_priv; | |
2020 | struct drm_gem_object *best = NULL; | |
2021 | struct drm_gem_object *first = NULL; | |
2022 | ||
2023 | /* Try to find the smallest clean object */ | |
2024 | list_for_each_entry(obj_priv, &dev_priv->mm.inactive_list, list) { | |
2025 | struct drm_gem_object *obj = obj_priv->obj; | |
2026 | if (obj->size >= min_size) { | |
2027 | if (i915_gem_object_is_purgeable(obj_priv) && | |
2028 | (!best || obj->size < best->size)) { | |
2029 | best = obj; | |
2030 | if (best->size == min_size) | |
2031 | return best; | |
2032 | } | |
2033 | if (!first) | |
2034 | first = obj; | |
2035 | } | |
2036 | } | |
2037 | ||
2038 | return best ? best : first; | |
2039 | } | |
2040 | ||
2041 | static int | |
2042 | i915_gem_evict_everything(struct drm_device *dev) | |
2043 | { | |
2044 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2045 | uint32_t seqno; | |
2046 | int ret; | |
2047 | bool lists_empty; | |
2048 | ||
2049 | DRM_INFO("GTT full, evicting everything: " | |
2050 | "%d objects [%d pinned], " | |
2051 | "%d object bytes [%d pinned], " | |
2052 | "%d/%d gtt bytes\n", | |
2053 | atomic_read(&dev->object_count), | |
2054 | atomic_read(&dev->pin_count), | |
2055 | atomic_read(&dev->object_memory), | |
2056 | atomic_read(&dev->pin_memory), | |
2057 | atomic_read(&dev->gtt_memory), | |
2058 | dev->gtt_total); | |
2059 | ||
2060 | spin_lock(&dev_priv->mm.active_list_lock); | |
2061 | lists_empty = (list_empty(&dev_priv->mm.inactive_list) && | |
2062 | list_empty(&dev_priv->mm.flushing_list) && | |
2063 | list_empty(&dev_priv->mm.active_list)); | |
2064 | spin_unlock(&dev_priv->mm.active_list_lock); | |
2065 | ||
2066 | if (lists_empty) { | |
2067 | DRM_ERROR("GTT full, but lists empty!\n"); | |
2068 | return -ENOSPC; | |
2069 | } | |
2070 | ||
2071 | /* Flush everything (on to the inactive lists) and evict */ | |
2072 | i915_gem_flush(dev, I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS); | |
2073 | seqno = i915_add_request(dev, NULL, I915_GEM_GPU_DOMAINS); | |
2074 | if (seqno == 0) | |
2075 | return -ENOMEM; | |
2076 | ||
2077 | ret = i915_wait_request(dev, seqno); | |
2078 | if (ret) | |
2079 | return ret; | |
2080 | ||
2081 | ret = i915_gem_evict_from_list(dev, &dev_priv->mm.inactive_list); | |
2082 | if (ret) | |
2083 | return ret; | |
2084 | ||
2085 | spin_lock(&dev_priv->mm.active_list_lock); | |
2086 | lists_empty = (list_empty(&dev_priv->mm.inactive_list) && | |
2087 | list_empty(&dev_priv->mm.flushing_list) && | |
2088 | list_empty(&dev_priv->mm.active_list)); | |
2089 | spin_unlock(&dev_priv->mm.active_list_lock); | |
2090 | BUG_ON(!lists_empty); | |
2091 | ||
2092 | return 0; | |
2093 | } | |
2094 | ||
673a394b | 2095 | static int |
07f73f69 | 2096 | i915_gem_evict_something(struct drm_device *dev, int min_size) |
673a394b EA |
2097 | { |
2098 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2099 | struct drm_gem_object *obj; | |
07f73f69 CW |
2100 | int have_waited = 0; |
2101 | int ret; | |
673a394b EA |
2102 | |
2103 | for (;;) { | |
07f73f69 CW |
2104 | i915_gem_retire_requests(dev); |
2105 | ||
673a394b EA |
2106 | /* If there's an inactive buffer available now, grab it |
2107 | * and be done. | |
2108 | */ | |
07f73f69 CW |
2109 | obj = i915_gem_find_inactive_object(dev, min_size); |
2110 | if (obj) { | |
2111 | struct drm_i915_gem_object *obj_priv; | |
2112 | ||
673a394b EA |
2113 | #if WATCH_LRU |
2114 | DRM_INFO("%s: evicting %p\n", __func__, obj); | |
2115 | #endif | |
07f73f69 CW |
2116 | obj_priv = obj->driver_private; |
2117 | BUG_ON(obj_priv->pin_count != 0); | |
673a394b EA |
2118 | BUG_ON(obj_priv->active); |
2119 | ||
2120 | /* Wait on the rendering and unbind the buffer. */ | |
07f73f69 | 2121 | return i915_gem_object_unbind(obj); |
673a394b EA |
2122 | } |
2123 | ||
07f73f69 CW |
2124 | if (have_waited) |
2125 | return 0; | |
2126 | ||
673a394b | 2127 | /* If we didn't get anything, but the ring is still processing |
07f73f69 CW |
2128 | * things, wait for the next to finish and hopefully leave us |
2129 | * a buffer to evict. | |
673a394b EA |
2130 | */ |
2131 | if (!list_empty(&dev_priv->mm.request_list)) { | |
2132 | struct drm_i915_gem_request *request; | |
2133 | ||
2134 | request = list_first_entry(&dev_priv->mm.request_list, | |
2135 | struct drm_i915_gem_request, | |
2136 | list); | |
2137 | ||
2138 | ret = i915_wait_request(dev, request->seqno); | |
2139 | if (ret) | |
07f73f69 | 2140 | return ret; |
673a394b | 2141 | |
07f73f69 CW |
2142 | have_waited = 1; |
2143 | continue; | |
673a394b EA |
2144 | } |
2145 | ||
2146 | /* If we didn't have anything on the request list but there | |
2147 | * are buffers awaiting a flush, emit one and try again. | |
2148 | * When we wait on it, those buffers waiting for that flush | |
2149 | * will get moved to inactive. | |
2150 | */ | |
2151 | if (!list_empty(&dev_priv->mm.flushing_list)) { | |
07f73f69 CW |
2152 | struct drm_i915_gem_object *obj_priv; |
2153 | uint32_t seqno; | |
2154 | ||
673a394b EA |
2155 | obj_priv = list_first_entry(&dev_priv->mm.flushing_list, |
2156 | struct drm_i915_gem_object, | |
2157 | list); | |
2158 | obj = obj_priv->obj; | |
2159 | ||
2160 | i915_gem_flush(dev, | |
2161 | obj->write_domain, | |
2162 | obj->write_domain); | |
07f73f69 CW |
2163 | seqno = i915_add_request(dev, NULL, obj->write_domain); |
2164 | if (seqno == 0) | |
2165 | return -ENOMEM; | |
2166 | ||
2167 | ret = i915_wait_request(dev, seqno); | |
2168 | if (ret) | |
2169 | return ret; | |
673a394b | 2170 | |
07f73f69 | 2171 | have_waited = 1; |
673a394b EA |
2172 | continue; |
2173 | } | |
2174 | ||
07f73f69 CW |
2175 | /* If we didn't do any of the above, there's no single buffer |
2176 | * large enough to swap out for the new one, so just evict | |
2177 | * everything and start again. (This should be rare.) | |
673a394b | 2178 | */ |
07f73f69 CW |
2179 | if (!list_empty (&dev_priv->mm.inactive_list)) { |
2180 | DRM_INFO("GTT full, evicting inactive buffers\n"); | |
2181 | return i915_gem_evict_from_list(dev, | |
2182 | &dev_priv->mm.inactive_list); | |
2183 | } else | |
2184 | return i915_gem_evict_everything(dev); | |
ac94a962 | 2185 | } |
ac94a962 KP |
2186 | } |
2187 | ||
6911a9b8 | 2188 | int |
856fa198 | 2189 | i915_gem_object_get_pages(struct drm_gem_object *obj) |
673a394b EA |
2190 | { |
2191 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2192 | int page_count, i; | |
2193 | struct address_space *mapping; | |
2194 | struct inode *inode; | |
2195 | struct page *page; | |
2196 | int ret; | |
2197 | ||
856fa198 | 2198 | if (obj_priv->pages_refcount++ != 0) |
673a394b EA |
2199 | return 0; |
2200 | ||
2201 | /* Get the list of pages out of our struct file. They'll be pinned | |
2202 | * at this point until we release them. | |
2203 | */ | |
2204 | page_count = obj->size / PAGE_SIZE; | |
856fa198 | 2205 | BUG_ON(obj_priv->pages != NULL); |
8e7d2b2c | 2206 | obj_priv->pages = drm_calloc_large(page_count, sizeof(struct page *)); |
856fa198 | 2207 | if (obj_priv->pages == NULL) { |
07f73f69 | 2208 | DRM_ERROR("Failed to allocate page list\n"); |
856fa198 | 2209 | obj_priv->pages_refcount--; |
673a394b EA |
2210 | return -ENOMEM; |
2211 | } | |
2212 | ||
2213 | inode = obj->filp->f_path.dentry->d_inode; | |
2214 | mapping = inode->i_mapping; | |
2215 | for (i = 0; i < page_count; i++) { | |
2216 | page = read_mapping_page(mapping, i, NULL); | |
2217 | if (IS_ERR(page)) { | |
2218 | ret = PTR_ERR(page); | |
856fa198 | 2219 | i915_gem_object_put_pages(obj); |
673a394b EA |
2220 | return ret; |
2221 | } | |
856fa198 | 2222 | obj_priv->pages[i] = page; |
673a394b | 2223 | } |
280b713b EA |
2224 | |
2225 | if (obj_priv->tiling_mode != I915_TILING_NONE) | |
2226 | i915_gem_object_do_bit_17_swizzle(obj); | |
2227 | ||
673a394b EA |
2228 | return 0; |
2229 | } | |
2230 | ||
de151cf6 JB |
2231 | static void i965_write_fence_reg(struct drm_i915_fence_reg *reg) |
2232 | { | |
2233 | struct drm_gem_object *obj = reg->obj; | |
2234 | struct drm_device *dev = obj->dev; | |
2235 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2236 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2237 | int regnum = obj_priv->fence_reg; | |
2238 | uint64_t val; | |
2239 | ||
2240 | val = (uint64_t)((obj_priv->gtt_offset + obj->size - 4096) & | |
2241 | 0xfffff000) << 32; | |
2242 | val |= obj_priv->gtt_offset & 0xfffff000; | |
2243 | val |= ((obj_priv->stride / 128) - 1) << I965_FENCE_PITCH_SHIFT; | |
2244 | if (obj_priv->tiling_mode == I915_TILING_Y) | |
2245 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; | |
2246 | val |= I965_FENCE_REG_VALID; | |
2247 | ||
2248 | I915_WRITE64(FENCE_REG_965_0 + (regnum * 8), val); | |
2249 | } | |
2250 | ||
2251 | static void i915_write_fence_reg(struct drm_i915_fence_reg *reg) | |
2252 | { | |
2253 | struct drm_gem_object *obj = reg->obj; | |
2254 | struct drm_device *dev = obj->dev; | |
2255 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2256 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2257 | int regnum = obj_priv->fence_reg; | |
0f973f27 | 2258 | int tile_width; |
dc529a4f | 2259 | uint32_t fence_reg, val; |
de151cf6 JB |
2260 | uint32_t pitch_val; |
2261 | ||
2262 | if ((obj_priv->gtt_offset & ~I915_FENCE_START_MASK) || | |
2263 | (obj_priv->gtt_offset & (obj->size - 1))) { | |
f06da264 | 2264 | WARN(1, "%s: object 0x%08x not 1M or size (0x%zx) aligned\n", |
0f973f27 | 2265 | __func__, obj_priv->gtt_offset, obj->size); |
de151cf6 JB |
2266 | return; |
2267 | } | |
2268 | ||
0f973f27 JB |
2269 | if (obj_priv->tiling_mode == I915_TILING_Y && |
2270 | HAS_128_BYTE_Y_TILING(dev)) | |
2271 | tile_width = 128; | |
de151cf6 | 2272 | else |
0f973f27 JB |
2273 | tile_width = 512; |
2274 | ||
2275 | /* Note: pitch better be a power of two tile widths */ | |
2276 | pitch_val = obj_priv->stride / tile_width; | |
2277 | pitch_val = ffs(pitch_val) - 1; | |
de151cf6 JB |
2278 | |
2279 | val = obj_priv->gtt_offset; | |
2280 | if (obj_priv->tiling_mode == I915_TILING_Y) | |
2281 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
2282 | val |= I915_FENCE_SIZE_BITS(obj->size); | |
2283 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
2284 | val |= I830_FENCE_REG_VALID; | |
2285 | ||
dc529a4f EA |
2286 | if (regnum < 8) |
2287 | fence_reg = FENCE_REG_830_0 + (regnum * 4); | |
2288 | else | |
2289 | fence_reg = FENCE_REG_945_8 + ((regnum - 8) * 4); | |
2290 | I915_WRITE(fence_reg, val); | |
de151cf6 JB |
2291 | } |
2292 | ||
2293 | static void i830_write_fence_reg(struct drm_i915_fence_reg *reg) | |
2294 | { | |
2295 | struct drm_gem_object *obj = reg->obj; | |
2296 | struct drm_device *dev = obj->dev; | |
2297 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2298 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2299 | int regnum = obj_priv->fence_reg; | |
2300 | uint32_t val; | |
2301 | uint32_t pitch_val; | |
8d7773a3 | 2302 | uint32_t fence_size_bits; |
de151cf6 | 2303 | |
8d7773a3 | 2304 | if ((obj_priv->gtt_offset & ~I830_FENCE_START_MASK) || |
de151cf6 | 2305 | (obj_priv->gtt_offset & (obj->size - 1))) { |
8d7773a3 | 2306 | WARN(1, "%s: object 0x%08x not 512K or size aligned\n", |
0f973f27 | 2307 | __func__, obj_priv->gtt_offset); |
de151cf6 JB |
2308 | return; |
2309 | } | |
2310 | ||
e76a16de EA |
2311 | pitch_val = obj_priv->stride / 128; |
2312 | pitch_val = ffs(pitch_val) - 1; | |
2313 | WARN_ON(pitch_val > I830_FENCE_MAX_PITCH_VAL); | |
2314 | ||
de151cf6 JB |
2315 | val = obj_priv->gtt_offset; |
2316 | if (obj_priv->tiling_mode == I915_TILING_Y) | |
2317 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
8d7773a3 DV |
2318 | fence_size_bits = I830_FENCE_SIZE_BITS(obj->size); |
2319 | WARN_ON(fence_size_bits & ~0x00000f00); | |
2320 | val |= fence_size_bits; | |
de151cf6 JB |
2321 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; |
2322 | val |= I830_FENCE_REG_VALID; | |
2323 | ||
2324 | I915_WRITE(FENCE_REG_830_0 + (regnum * 4), val); | |
de151cf6 JB |
2325 | } |
2326 | ||
2327 | /** | |
2328 | * i915_gem_object_get_fence_reg - set up a fence reg for an object | |
2329 | * @obj: object to map through a fence reg | |
2330 | * | |
2331 | * When mapping objects through the GTT, userspace wants to be able to write | |
2332 | * to them without having to worry about swizzling if the object is tiled. | |
2333 | * | |
2334 | * This function walks the fence regs looking for a free one for @obj, | |
2335 | * stealing one if it can't find any. | |
2336 | * | |
2337 | * It then sets up the reg based on the object's properties: address, pitch | |
2338 | * and tiling format. | |
2339 | */ | |
8c4b8c3f CW |
2340 | int |
2341 | i915_gem_object_get_fence_reg(struct drm_gem_object *obj) | |
de151cf6 JB |
2342 | { |
2343 | struct drm_device *dev = obj->dev; | |
79e53945 | 2344 | struct drm_i915_private *dev_priv = dev->dev_private; |
de151cf6 JB |
2345 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
2346 | struct drm_i915_fence_reg *reg = NULL; | |
fc7170ba CW |
2347 | struct drm_i915_gem_object *old_obj_priv = NULL; |
2348 | int i, ret, avail; | |
de151cf6 | 2349 | |
a09ba7fa EA |
2350 | /* Just update our place in the LRU if our fence is getting used. */ |
2351 | if (obj_priv->fence_reg != I915_FENCE_REG_NONE) { | |
2352 | list_move_tail(&obj_priv->fence_list, &dev_priv->mm.fence_list); | |
2353 | return 0; | |
2354 | } | |
2355 | ||
de151cf6 JB |
2356 | switch (obj_priv->tiling_mode) { |
2357 | case I915_TILING_NONE: | |
2358 | WARN(1, "allocating a fence for non-tiled object?\n"); | |
2359 | break; | |
2360 | case I915_TILING_X: | |
0f973f27 JB |
2361 | if (!obj_priv->stride) |
2362 | return -EINVAL; | |
2363 | WARN((obj_priv->stride & (512 - 1)), | |
2364 | "object 0x%08x is X tiled but has non-512B pitch\n", | |
2365 | obj_priv->gtt_offset); | |
de151cf6 JB |
2366 | break; |
2367 | case I915_TILING_Y: | |
0f973f27 JB |
2368 | if (!obj_priv->stride) |
2369 | return -EINVAL; | |
2370 | WARN((obj_priv->stride & (128 - 1)), | |
2371 | "object 0x%08x is Y tiled but has non-128B pitch\n", | |
2372 | obj_priv->gtt_offset); | |
de151cf6 JB |
2373 | break; |
2374 | } | |
2375 | ||
2376 | /* First try to find a free reg */ | |
fc7170ba | 2377 | avail = 0; |
de151cf6 JB |
2378 | for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { |
2379 | reg = &dev_priv->fence_regs[i]; | |
2380 | if (!reg->obj) | |
2381 | break; | |
fc7170ba CW |
2382 | |
2383 | old_obj_priv = reg->obj->driver_private; | |
2384 | if (!old_obj_priv->pin_count) | |
2385 | avail++; | |
de151cf6 JB |
2386 | } |
2387 | ||
2388 | /* None available, try to steal one or wait for a user to finish */ | |
2389 | if (i == dev_priv->num_fence_regs) { | |
a09ba7fa | 2390 | struct drm_gem_object *old_obj = NULL; |
de151cf6 | 2391 | |
fc7170ba | 2392 | if (avail == 0) |
2939e1f5 | 2393 | return -ENOSPC; |
fc7170ba | 2394 | |
a09ba7fa EA |
2395 | list_for_each_entry(old_obj_priv, &dev_priv->mm.fence_list, |
2396 | fence_list) { | |
2397 | old_obj = old_obj_priv->obj; | |
d7619c4b CW |
2398 | |
2399 | if (old_obj_priv->pin_count) | |
2400 | continue; | |
2401 | ||
a09ba7fa EA |
2402 | /* Take a reference, as otherwise the wait_rendering |
2403 | * below may cause the object to get freed out from | |
2404 | * under us. | |
2405 | */ | |
2406 | drm_gem_object_reference(old_obj); | |
2407 | ||
d7619c4b CW |
2408 | /* i915 uses fences for GPU access to tiled buffers */ |
2409 | if (IS_I965G(dev) || !old_obj_priv->active) | |
de151cf6 | 2410 | break; |
d7619c4b | 2411 | |
a09ba7fa EA |
2412 | /* This brings the object to the head of the LRU if it |
2413 | * had been written to. The only way this should | |
2414 | * result in us waiting longer than the expected | |
2415 | * optimal amount of time is if there was a | |
2416 | * fence-using buffer later that was read-only. | |
2417 | */ | |
2418 | i915_gem_object_flush_gpu_write_domain(old_obj); | |
2419 | ret = i915_gem_object_wait_rendering(old_obj); | |
58c2fb64 CW |
2420 | if (ret != 0) { |
2421 | drm_gem_object_unreference(old_obj); | |
d7619c4b | 2422 | return ret; |
de151cf6 | 2423 | } |
d7619c4b | 2424 | |
a09ba7fa | 2425 | break; |
de151cf6 JB |
2426 | } |
2427 | ||
2428 | /* | |
2429 | * Zap this virtual mapping so we can set up a fence again | |
2430 | * for this object next time we need it. | |
2431 | */ | |
58c2fb64 CW |
2432 | i915_gem_release_mmap(old_obj); |
2433 | ||
a09ba7fa | 2434 | i = old_obj_priv->fence_reg; |
58c2fb64 CW |
2435 | reg = &dev_priv->fence_regs[i]; |
2436 | ||
de151cf6 | 2437 | old_obj_priv->fence_reg = I915_FENCE_REG_NONE; |
a09ba7fa | 2438 | list_del_init(&old_obj_priv->fence_list); |
58c2fb64 | 2439 | |
a09ba7fa | 2440 | drm_gem_object_unreference(old_obj); |
de151cf6 JB |
2441 | } |
2442 | ||
2443 | obj_priv->fence_reg = i; | |
a09ba7fa EA |
2444 | list_add_tail(&obj_priv->fence_list, &dev_priv->mm.fence_list); |
2445 | ||
de151cf6 JB |
2446 | reg->obj = obj; |
2447 | ||
2448 | if (IS_I965G(dev)) | |
2449 | i965_write_fence_reg(reg); | |
2450 | else if (IS_I9XX(dev)) | |
2451 | i915_write_fence_reg(reg); | |
2452 | else | |
2453 | i830_write_fence_reg(reg); | |
d9ddcb96 EA |
2454 | |
2455 | return 0; | |
de151cf6 JB |
2456 | } |
2457 | ||
2458 | /** | |
2459 | * i915_gem_clear_fence_reg - clear out fence register info | |
2460 | * @obj: object to clear | |
2461 | * | |
2462 | * Zeroes out the fence register itself and clears out the associated | |
2463 | * data structures in dev_priv and obj_priv. | |
2464 | */ | |
2465 | static void | |
2466 | i915_gem_clear_fence_reg(struct drm_gem_object *obj) | |
2467 | { | |
2468 | struct drm_device *dev = obj->dev; | |
79e53945 | 2469 | drm_i915_private_t *dev_priv = dev->dev_private; |
de151cf6 JB |
2470 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
2471 | ||
2472 | if (IS_I965G(dev)) | |
2473 | I915_WRITE64(FENCE_REG_965_0 + (obj_priv->fence_reg * 8), 0); | |
dc529a4f EA |
2474 | else { |
2475 | uint32_t fence_reg; | |
2476 | ||
2477 | if (obj_priv->fence_reg < 8) | |
2478 | fence_reg = FENCE_REG_830_0 + obj_priv->fence_reg * 4; | |
2479 | else | |
2480 | fence_reg = FENCE_REG_945_8 + (obj_priv->fence_reg - | |
2481 | 8) * 4; | |
2482 | ||
2483 | I915_WRITE(fence_reg, 0); | |
2484 | } | |
de151cf6 JB |
2485 | |
2486 | dev_priv->fence_regs[obj_priv->fence_reg].obj = NULL; | |
2487 | obj_priv->fence_reg = I915_FENCE_REG_NONE; | |
a09ba7fa | 2488 | list_del_init(&obj_priv->fence_list); |
de151cf6 JB |
2489 | } |
2490 | ||
52dc7d32 CW |
2491 | /** |
2492 | * i915_gem_object_put_fence_reg - waits on outstanding fenced access | |
2493 | * to the buffer to finish, and then resets the fence register. | |
2494 | * @obj: tiled object holding a fence register. | |
2495 | * | |
2496 | * Zeroes out the fence register itself and clears out the associated | |
2497 | * data structures in dev_priv and obj_priv. | |
2498 | */ | |
2499 | int | |
2500 | i915_gem_object_put_fence_reg(struct drm_gem_object *obj) | |
2501 | { | |
2502 | struct drm_device *dev = obj->dev; | |
2503 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2504 | ||
2505 | if (obj_priv->fence_reg == I915_FENCE_REG_NONE) | |
2506 | return 0; | |
2507 | ||
2508 | /* On the i915, GPU access to tiled buffers is via a fence, | |
2509 | * therefore we must wait for any outstanding access to complete | |
2510 | * before clearing the fence. | |
2511 | */ | |
2512 | if (!IS_I965G(dev)) { | |
2513 | int ret; | |
2514 | ||
2515 | i915_gem_object_flush_gpu_write_domain(obj); | |
2516 | i915_gem_object_flush_gtt_write_domain(obj); | |
2517 | ret = i915_gem_object_wait_rendering(obj); | |
2518 | if (ret != 0) | |
2519 | return ret; | |
2520 | } | |
2521 | ||
2522 | i915_gem_clear_fence_reg (obj); | |
2523 | ||
2524 | return 0; | |
2525 | } | |
2526 | ||
673a394b EA |
2527 | /** |
2528 | * Finds free space in the GTT aperture and binds the object there. | |
2529 | */ | |
2530 | static int | |
2531 | i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment) | |
2532 | { | |
2533 | struct drm_device *dev = obj->dev; | |
2534 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2535 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2536 | struct drm_mm_node *free_space; | |
07f73f69 CW |
2537 | bool retry_alloc = false; |
2538 | int ret; | |
673a394b | 2539 | |
9bb2d6f9 EA |
2540 | if (dev_priv->mm.suspended) |
2541 | return -EBUSY; | |
3ef94daa CW |
2542 | |
2543 | if (obj_priv->madv == I915_MADV_DONTNEED) { | |
2544 | DRM_ERROR("Attempting to bind a purgeable object\n"); | |
2545 | return -EINVAL; | |
2546 | } | |
2547 | ||
673a394b | 2548 | if (alignment == 0) |
0f973f27 | 2549 | alignment = i915_gem_get_gtt_alignment(obj); |
8d7773a3 | 2550 | if (alignment & (i915_gem_get_gtt_alignment(obj) - 1)) { |
673a394b EA |
2551 | DRM_ERROR("Invalid object alignment requested %u\n", alignment); |
2552 | return -EINVAL; | |
2553 | } | |
2554 | ||
2555 | search_free: | |
2556 | free_space = drm_mm_search_free(&dev_priv->mm.gtt_space, | |
2557 | obj->size, alignment, 0); | |
2558 | if (free_space != NULL) { | |
2559 | obj_priv->gtt_space = drm_mm_get_block(free_space, obj->size, | |
2560 | alignment); | |
2561 | if (obj_priv->gtt_space != NULL) { | |
2562 | obj_priv->gtt_space->private = obj; | |
2563 | obj_priv->gtt_offset = obj_priv->gtt_space->start; | |
2564 | } | |
2565 | } | |
2566 | if (obj_priv->gtt_space == NULL) { | |
2567 | /* If the gtt is empty and we're still having trouble | |
2568 | * fitting our object in, we're out of memory. | |
2569 | */ | |
2570 | #if WATCH_LRU | |
2571 | DRM_INFO("%s: GTT full, evicting something\n", __func__); | |
2572 | #endif | |
07f73f69 | 2573 | ret = i915_gem_evict_something(dev, obj->size); |
673a394b | 2574 | if (ret != 0) { |
ac94a962 KP |
2575 | if (ret != -ERESTARTSYS) |
2576 | DRM_ERROR("Failed to evict a buffer %d\n", ret); | |
673a394b EA |
2577 | return ret; |
2578 | } | |
2579 | goto search_free; | |
2580 | } | |
2581 | ||
2582 | #if WATCH_BUF | |
cfd43c02 | 2583 | DRM_INFO("Binding object of size %zd at 0x%08x\n", |
673a394b EA |
2584 | obj->size, obj_priv->gtt_offset); |
2585 | #endif | |
07f73f69 CW |
2586 | if (retry_alloc) { |
2587 | i915_gem_object_set_page_gfp_mask (obj, | |
2588 | i915_gem_object_get_page_gfp_mask (obj) & ~__GFP_NORETRY); | |
2589 | } | |
856fa198 | 2590 | ret = i915_gem_object_get_pages(obj); |
07f73f69 CW |
2591 | if (retry_alloc) { |
2592 | i915_gem_object_set_page_gfp_mask (obj, | |
2593 | i915_gem_object_get_page_gfp_mask (obj) | __GFP_NORETRY); | |
2594 | } | |
673a394b EA |
2595 | if (ret) { |
2596 | drm_mm_put_block(obj_priv->gtt_space); | |
2597 | obj_priv->gtt_space = NULL; | |
07f73f69 CW |
2598 | |
2599 | if (ret == -ENOMEM) { | |
2600 | /* first try to clear up some space from the GTT */ | |
2601 | ret = i915_gem_evict_something(dev, obj->size); | |
2602 | if (ret) { | |
2603 | if (ret != -ERESTARTSYS) | |
2604 | DRM_ERROR("Failed to allocate space for backing pages %d\n", ret); | |
2605 | ||
2606 | /* now try to shrink everyone else */ | |
2607 | if (! retry_alloc) { | |
2608 | retry_alloc = true; | |
2609 | goto search_free; | |
2610 | } | |
2611 | ||
2612 | return ret; | |
2613 | } | |
2614 | ||
2615 | goto search_free; | |
2616 | } | |
2617 | ||
673a394b EA |
2618 | return ret; |
2619 | } | |
2620 | ||
673a394b EA |
2621 | /* Create an AGP memory structure pointing at our pages, and bind it |
2622 | * into the GTT. | |
2623 | */ | |
2624 | obj_priv->agp_mem = drm_agp_bind_pages(dev, | |
856fa198 | 2625 | obj_priv->pages, |
07f73f69 | 2626 | obj->size >> PAGE_SHIFT, |
ba1eb1d8 KP |
2627 | obj_priv->gtt_offset, |
2628 | obj_priv->agp_type); | |
673a394b | 2629 | if (obj_priv->agp_mem == NULL) { |
856fa198 | 2630 | i915_gem_object_put_pages(obj); |
673a394b EA |
2631 | drm_mm_put_block(obj_priv->gtt_space); |
2632 | obj_priv->gtt_space = NULL; | |
07f73f69 CW |
2633 | |
2634 | ret = i915_gem_evict_something(dev, obj->size); | |
2635 | if (ret) { | |
2636 | if (ret != -ERESTARTSYS) | |
2637 | DRM_ERROR("Failed to allocate space to bind AGP: %d\n", ret); | |
2638 | return ret; | |
2639 | } | |
2640 | ||
2641 | goto search_free; | |
673a394b EA |
2642 | } |
2643 | atomic_inc(&dev->gtt_count); | |
2644 | atomic_add(obj->size, &dev->gtt_memory); | |
2645 | ||
2646 | /* Assert that the object is not currently in any GPU domain. As it | |
2647 | * wasn't in the GTT, there shouldn't be any way it could have been in | |
2648 | * a GPU cache | |
2649 | */ | |
21d509e3 CW |
2650 | BUG_ON(obj->read_domains & I915_GEM_GPU_DOMAINS); |
2651 | BUG_ON(obj->write_domain & I915_GEM_GPU_DOMAINS); | |
673a394b EA |
2652 | |
2653 | return 0; | |
2654 | } | |
2655 | ||
2656 | void | |
2657 | i915_gem_clflush_object(struct drm_gem_object *obj) | |
2658 | { | |
2659 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2660 | ||
2661 | /* If we don't have a page list set up, then we're not pinned | |
2662 | * to GPU, and we can ignore the cache flush because it'll happen | |
2663 | * again at bind time. | |
2664 | */ | |
856fa198 | 2665 | if (obj_priv->pages == NULL) |
673a394b EA |
2666 | return; |
2667 | ||
856fa198 | 2668 | drm_clflush_pages(obj_priv->pages, obj->size / PAGE_SIZE); |
673a394b EA |
2669 | } |
2670 | ||
e47c68e9 EA |
2671 | /** Flushes any GPU write domain for the object if it's dirty. */ |
2672 | static void | |
2673 | i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj) | |
2674 | { | |
2675 | struct drm_device *dev = obj->dev; | |
2676 | uint32_t seqno; | |
2677 | ||
2678 | if ((obj->write_domain & I915_GEM_GPU_DOMAINS) == 0) | |
2679 | return; | |
2680 | ||
2681 | /* Queue the GPU write cache flushing we need. */ | |
2682 | i915_gem_flush(dev, 0, obj->write_domain); | |
b962442e | 2683 | seqno = i915_add_request(dev, NULL, obj->write_domain); |
e47c68e9 EA |
2684 | obj->write_domain = 0; |
2685 | i915_gem_object_move_to_active(obj, seqno); | |
2686 | } | |
2687 | ||
2688 | /** Flushes the GTT write domain for the object if it's dirty. */ | |
2689 | static void | |
2690 | i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj) | |
2691 | { | |
2692 | if (obj->write_domain != I915_GEM_DOMAIN_GTT) | |
2693 | return; | |
2694 | ||
2695 | /* No actual flushing is required for the GTT write domain. Writes | |
2696 | * to it immediately go to main memory as far as we know, so there's | |
2697 | * no chipset flush. It also doesn't land in render cache. | |
2698 | */ | |
2699 | obj->write_domain = 0; | |
2700 | } | |
2701 | ||
2702 | /** Flushes the CPU write domain for the object if it's dirty. */ | |
2703 | static void | |
2704 | i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj) | |
2705 | { | |
2706 | struct drm_device *dev = obj->dev; | |
2707 | ||
2708 | if (obj->write_domain != I915_GEM_DOMAIN_CPU) | |
2709 | return; | |
2710 | ||
2711 | i915_gem_clflush_object(obj); | |
2712 | drm_agp_chipset_flush(dev); | |
2713 | obj->write_domain = 0; | |
2714 | } | |
2715 | ||
2ef7eeaa EA |
2716 | /** |
2717 | * Moves a single object to the GTT read, and possibly write domain. | |
2718 | * | |
2719 | * This function returns when the move is complete, including waiting on | |
2720 | * flushes to occur. | |
2721 | */ | |
79e53945 | 2722 | int |
2ef7eeaa EA |
2723 | i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj, int write) |
2724 | { | |
2ef7eeaa | 2725 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
e47c68e9 | 2726 | int ret; |
2ef7eeaa | 2727 | |
02354392 EA |
2728 | /* Not valid to be called on unbound objects. */ |
2729 | if (obj_priv->gtt_space == NULL) | |
2730 | return -EINVAL; | |
2731 | ||
e47c68e9 EA |
2732 | i915_gem_object_flush_gpu_write_domain(obj); |
2733 | /* Wait on any GPU rendering and flushing to occur. */ | |
2734 | ret = i915_gem_object_wait_rendering(obj); | |
2735 | if (ret != 0) | |
2736 | return ret; | |
2737 | ||
2738 | /* If we're writing through the GTT domain, then CPU and GPU caches | |
2739 | * will need to be invalidated at next use. | |
2ef7eeaa | 2740 | */ |
e47c68e9 EA |
2741 | if (write) |
2742 | obj->read_domains &= I915_GEM_DOMAIN_GTT; | |
2ef7eeaa | 2743 | |
e47c68e9 | 2744 | i915_gem_object_flush_cpu_write_domain(obj); |
2ef7eeaa | 2745 | |
e47c68e9 EA |
2746 | /* It should now be out of any other write domains, and we can update |
2747 | * the domain values for our changes. | |
2748 | */ | |
2749 | BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_GTT) != 0); | |
2750 | obj->read_domains |= I915_GEM_DOMAIN_GTT; | |
2751 | if (write) { | |
2752 | obj->write_domain = I915_GEM_DOMAIN_GTT; | |
2753 | obj_priv->dirty = 1; | |
2ef7eeaa EA |
2754 | } |
2755 | ||
e47c68e9 EA |
2756 | return 0; |
2757 | } | |
2758 | ||
2759 | /** | |
2760 | * Moves a single object to the CPU read, and possibly write domain. | |
2761 | * | |
2762 | * This function returns when the move is complete, including waiting on | |
2763 | * flushes to occur. | |
2764 | */ | |
2765 | static int | |
2766 | i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, int write) | |
2767 | { | |
e47c68e9 EA |
2768 | int ret; |
2769 | ||
2770 | i915_gem_object_flush_gpu_write_domain(obj); | |
2ef7eeaa | 2771 | /* Wait on any GPU rendering and flushing to occur. */ |
e47c68e9 EA |
2772 | ret = i915_gem_object_wait_rendering(obj); |
2773 | if (ret != 0) | |
2774 | return ret; | |
2ef7eeaa | 2775 | |
e47c68e9 | 2776 | i915_gem_object_flush_gtt_write_domain(obj); |
2ef7eeaa | 2777 | |
e47c68e9 EA |
2778 | /* If we have a partially-valid cache of the object in the CPU, |
2779 | * finish invalidating it and free the per-page flags. | |
2ef7eeaa | 2780 | */ |
e47c68e9 | 2781 | i915_gem_object_set_to_full_cpu_read_domain(obj); |
2ef7eeaa | 2782 | |
e47c68e9 EA |
2783 | /* Flush the CPU cache if it's still invalid. */ |
2784 | if ((obj->read_domains & I915_GEM_DOMAIN_CPU) == 0) { | |
2ef7eeaa | 2785 | i915_gem_clflush_object(obj); |
2ef7eeaa | 2786 | |
e47c68e9 | 2787 | obj->read_domains |= I915_GEM_DOMAIN_CPU; |
2ef7eeaa EA |
2788 | } |
2789 | ||
2790 | /* It should now be out of any other write domains, and we can update | |
2791 | * the domain values for our changes. | |
2792 | */ | |
e47c68e9 EA |
2793 | BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_CPU) != 0); |
2794 | ||
2795 | /* If we're writing through the CPU, then the GPU read domains will | |
2796 | * need to be invalidated at next use. | |
2797 | */ | |
2798 | if (write) { | |
2799 | obj->read_domains &= I915_GEM_DOMAIN_CPU; | |
2800 | obj->write_domain = I915_GEM_DOMAIN_CPU; | |
2801 | } | |
2ef7eeaa EA |
2802 | |
2803 | return 0; | |
2804 | } | |
2805 | ||
673a394b EA |
2806 | /* |
2807 | * Set the next domain for the specified object. This | |
2808 | * may not actually perform the necessary flushing/invaliding though, | |
2809 | * as that may want to be batched with other set_domain operations | |
2810 | * | |
2811 | * This is (we hope) the only really tricky part of gem. The goal | |
2812 | * is fairly simple -- track which caches hold bits of the object | |
2813 | * and make sure they remain coherent. A few concrete examples may | |
2814 | * help to explain how it works. For shorthand, we use the notation | |
2815 | * (read_domains, write_domain), e.g. (CPU, CPU) to indicate the | |
2816 | * a pair of read and write domain masks. | |
2817 | * | |
2818 | * Case 1: the batch buffer | |
2819 | * | |
2820 | * 1. Allocated | |
2821 | * 2. Written by CPU | |
2822 | * 3. Mapped to GTT | |
2823 | * 4. Read by GPU | |
2824 | * 5. Unmapped from GTT | |
2825 | * 6. Freed | |
2826 | * | |
2827 | * Let's take these a step at a time | |
2828 | * | |
2829 | * 1. Allocated | |
2830 | * Pages allocated from the kernel may still have | |
2831 | * cache contents, so we set them to (CPU, CPU) always. | |
2832 | * 2. Written by CPU (using pwrite) | |
2833 | * The pwrite function calls set_domain (CPU, CPU) and | |
2834 | * this function does nothing (as nothing changes) | |
2835 | * 3. Mapped by GTT | |
2836 | * This function asserts that the object is not | |
2837 | * currently in any GPU-based read or write domains | |
2838 | * 4. Read by GPU | |
2839 | * i915_gem_execbuffer calls set_domain (COMMAND, 0). | |
2840 | * As write_domain is zero, this function adds in the | |
2841 | * current read domains (CPU+COMMAND, 0). | |
2842 | * flush_domains is set to CPU. | |
2843 | * invalidate_domains is set to COMMAND | |
2844 | * clflush is run to get data out of the CPU caches | |
2845 | * then i915_dev_set_domain calls i915_gem_flush to | |
2846 | * emit an MI_FLUSH and drm_agp_chipset_flush | |
2847 | * 5. Unmapped from GTT | |
2848 | * i915_gem_object_unbind calls set_domain (CPU, CPU) | |
2849 | * flush_domains and invalidate_domains end up both zero | |
2850 | * so no flushing/invalidating happens | |
2851 | * 6. Freed | |
2852 | * yay, done | |
2853 | * | |
2854 | * Case 2: The shared render buffer | |
2855 | * | |
2856 | * 1. Allocated | |
2857 | * 2. Mapped to GTT | |
2858 | * 3. Read/written by GPU | |
2859 | * 4. set_domain to (CPU,CPU) | |
2860 | * 5. Read/written by CPU | |
2861 | * 6. Read/written by GPU | |
2862 | * | |
2863 | * 1. Allocated | |
2864 | * Same as last example, (CPU, CPU) | |
2865 | * 2. Mapped to GTT | |
2866 | * Nothing changes (assertions find that it is not in the GPU) | |
2867 | * 3. Read/written by GPU | |
2868 | * execbuffer calls set_domain (RENDER, RENDER) | |
2869 | * flush_domains gets CPU | |
2870 | * invalidate_domains gets GPU | |
2871 | * clflush (obj) | |
2872 | * MI_FLUSH and drm_agp_chipset_flush | |
2873 | * 4. set_domain (CPU, CPU) | |
2874 | * flush_domains gets GPU | |
2875 | * invalidate_domains gets CPU | |
2876 | * wait_rendering (obj) to make sure all drawing is complete. | |
2877 | * This will include an MI_FLUSH to get the data from GPU | |
2878 | * to memory | |
2879 | * clflush (obj) to invalidate the CPU cache | |
2880 | * Another MI_FLUSH in i915_gem_flush (eliminate this somehow?) | |
2881 | * 5. Read/written by CPU | |
2882 | * cache lines are loaded and dirtied | |
2883 | * 6. Read written by GPU | |
2884 | * Same as last GPU access | |
2885 | * | |
2886 | * Case 3: The constant buffer | |
2887 | * | |
2888 | * 1. Allocated | |
2889 | * 2. Written by CPU | |
2890 | * 3. Read by GPU | |
2891 | * 4. Updated (written) by CPU again | |
2892 | * 5. Read by GPU | |
2893 | * | |
2894 | * 1. Allocated | |
2895 | * (CPU, CPU) | |
2896 | * 2. Written by CPU | |
2897 | * (CPU, CPU) | |
2898 | * 3. Read by GPU | |
2899 | * (CPU+RENDER, 0) | |
2900 | * flush_domains = CPU | |
2901 | * invalidate_domains = RENDER | |
2902 | * clflush (obj) | |
2903 | * MI_FLUSH | |
2904 | * drm_agp_chipset_flush | |
2905 | * 4. Updated (written) by CPU again | |
2906 | * (CPU, CPU) | |
2907 | * flush_domains = 0 (no previous write domain) | |
2908 | * invalidate_domains = 0 (no new read domains) | |
2909 | * 5. Read by GPU | |
2910 | * (CPU+RENDER, 0) | |
2911 | * flush_domains = CPU | |
2912 | * invalidate_domains = RENDER | |
2913 | * clflush (obj) | |
2914 | * MI_FLUSH | |
2915 | * drm_agp_chipset_flush | |
2916 | */ | |
c0d90829 | 2917 | static void |
8b0e378a | 2918 | i915_gem_object_set_to_gpu_domain(struct drm_gem_object *obj) |
673a394b EA |
2919 | { |
2920 | struct drm_device *dev = obj->dev; | |
2921 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2922 | uint32_t invalidate_domains = 0; | |
2923 | uint32_t flush_domains = 0; | |
e47c68e9 | 2924 | |
8b0e378a EA |
2925 | BUG_ON(obj->pending_read_domains & I915_GEM_DOMAIN_CPU); |
2926 | BUG_ON(obj->pending_write_domain == I915_GEM_DOMAIN_CPU); | |
673a394b | 2927 | |
652c393a JB |
2928 | intel_mark_busy(dev, obj); |
2929 | ||
673a394b EA |
2930 | #if WATCH_BUF |
2931 | DRM_INFO("%s: object %p read %08x -> %08x write %08x -> %08x\n", | |
2932 | __func__, obj, | |
8b0e378a EA |
2933 | obj->read_domains, obj->pending_read_domains, |
2934 | obj->write_domain, obj->pending_write_domain); | |
673a394b EA |
2935 | #endif |
2936 | /* | |
2937 | * If the object isn't moving to a new write domain, | |
2938 | * let the object stay in multiple read domains | |
2939 | */ | |
8b0e378a EA |
2940 | if (obj->pending_write_domain == 0) |
2941 | obj->pending_read_domains |= obj->read_domains; | |
673a394b EA |
2942 | else |
2943 | obj_priv->dirty = 1; | |
2944 | ||
2945 | /* | |
2946 | * Flush the current write domain if | |
2947 | * the new read domains don't match. Invalidate | |
2948 | * any read domains which differ from the old | |
2949 | * write domain | |
2950 | */ | |
8b0e378a EA |
2951 | if (obj->write_domain && |
2952 | obj->write_domain != obj->pending_read_domains) { | |
673a394b | 2953 | flush_domains |= obj->write_domain; |
8b0e378a EA |
2954 | invalidate_domains |= |
2955 | obj->pending_read_domains & ~obj->write_domain; | |
673a394b EA |
2956 | } |
2957 | /* | |
2958 | * Invalidate any read caches which may have | |
2959 | * stale data. That is, any new read domains. | |
2960 | */ | |
8b0e378a | 2961 | invalidate_domains |= obj->pending_read_domains & ~obj->read_domains; |
673a394b EA |
2962 | if ((flush_domains | invalidate_domains) & I915_GEM_DOMAIN_CPU) { |
2963 | #if WATCH_BUF | |
2964 | DRM_INFO("%s: CPU domain flush %08x invalidate %08x\n", | |
2965 | __func__, flush_domains, invalidate_domains); | |
2966 | #endif | |
673a394b EA |
2967 | i915_gem_clflush_object(obj); |
2968 | } | |
2969 | ||
efbeed96 EA |
2970 | /* The actual obj->write_domain will be updated with |
2971 | * pending_write_domain after we emit the accumulated flush for all | |
2972 | * of our domain changes in execbuffers (which clears objects' | |
2973 | * write_domains). So if we have a current write domain that we | |
2974 | * aren't changing, set pending_write_domain to that. | |
2975 | */ | |
2976 | if (flush_domains == 0 && obj->pending_write_domain == 0) | |
2977 | obj->pending_write_domain = obj->write_domain; | |
8b0e378a | 2978 | obj->read_domains = obj->pending_read_domains; |
673a394b EA |
2979 | |
2980 | dev->invalidate_domains |= invalidate_domains; | |
2981 | dev->flush_domains |= flush_domains; | |
2982 | #if WATCH_BUF | |
2983 | DRM_INFO("%s: read %08x write %08x invalidate %08x flush %08x\n", | |
2984 | __func__, | |
2985 | obj->read_domains, obj->write_domain, | |
2986 | dev->invalidate_domains, dev->flush_domains); | |
2987 | #endif | |
673a394b EA |
2988 | } |
2989 | ||
2990 | /** | |
e47c68e9 | 2991 | * Moves the object from a partially CPU read to a full one. |
673a394b | 2992 | * |
e47c68e9 EA |
2993 | * Note that this only resolves i915_gem_object_set_cpu_read_domain_range(), |
2994 | * and doesn't handle transitioning from !(read_domains & I915_GEM_DOMAIN_CPU). | |
673a394b | 2995 | */ |
e47c68e9 EA |
2996 | static void |
2997 | i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object *obj) | |
673a394b EA |
2998 | { |
2999 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
673a394b | 3000 | |
e47c68e9 EA |
3001 | if (!obj_priv->page_cpu_valid) |
3002 | return; | |
3003 | ||
3004 | /* If we're partially in the CPU read domain, finish moving it in. | |
3005 | */ | |
3006 | if (obj->read_domains & I915_GEM_DOMAIN_CPU) { | |
3007 | int i; | |
3008 | ||
3009 | for (i = 0; i <= (obj->size - 1) / PAGE_SIZE; i++) { | |
3010 | if (obj_priv->page_cpu_valid[i]) | |
3011 | continue; | |
856fa198 | 3012 | drm_clflush_pages(obj_priv->pages + i, 1); |
e47c68e9 | 3013 | } |
e47c68e9 EA |
3014 | } |
3015 | ||
3016 | /* Free the page_cpu_valid mappings which are now stale, whether | |
3017 | * or not we've got I915_GEM_DOMAIN_CPU. | |
3018 | */ | |
9a298b2a | 3019 | kfree(obj_priv->page_cpu_valid); |
e47c68e9 EA |
3020 | obj_priv->page_cpu_valid = NULL; |
3021 | } | |
3022 | ||
3023 | /** | |
3024 | * Set the CPU read domain on a range of the object. | |
3025 | * | |
3026 | * The object ends up with I915_GEM_DOMAIN_CPU in its read flags although it's | |
3027 | * not entirely valid. The page_cpu_valid member of the object flags which | |
3028 | * pages have been flushed, and will be respected by | |
3029 | * i915_gem_object_set_to_cpu_domain() if it's called on to get a valid mapping | |
3030 | * of the whole object. | |
3031 | * | |
3032 | * This function returns when the move is complete, including waiting on | |
3033 | * flushes to occur. | |
3034 | */ | |
3035 | static int | |
3036 | i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj, | |
3037 | uint64_t offset, uint64_t size) | |
3038 | { | |
3039 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
3040 | int i, ret; | |
673a394b | 3041 | |
e47c68e9 EA |
3042 | if (offset == 0 && size == obj->size) |
3043 | return i915_gem_object_set_to_cpu_domain(obj, 0); | |
673a394b | 3044 | |
e47c68e9 EA |
3045 | i915_gem_object_flush_gpu_write_domain(obj); |
3046 | /* Wait on any GPU rendering and flushing to occur. */ | |
6a47baa6 | 3047 | ret = i915_gem_object_wait_rendering(obj); |
e47c68e9 | 3048 | if (ret != 0) |
6a47baa6 | 3049 | return ret; |
e47c68e9 EA |
3050 | i915_gem_object_flush_gtt_write_domain(obj); |
3051 | ||
3052 | /* If we're already fully in the CPU read domain, we're done. */ | |
3053 | if (obj_priv->page_cpu_valid == NULL && | |
3054 | (obj->read_domains & I915_GEM_DOMAIN_CPU) != 0) | |
3055 | return 0; | |
673a394b | 3056 | |
e47c68e9 EA |
3057 | /* Otherwise, create/clear the per-page CPU read domain flag if we're |
3058 | * newly adding I915_GEM_DOMAIN_CPU | |
3059 | */ | |
673a394b | 3060 | if (obj_priv->page_cpu_valid == NULL) { |
9a298b2a EA |
3061 | obj_priv->page_cpu_valid = kzalloc(obj->size / PAGE_SIZE, |
3062 | GFP_KERNEL); | |
e47c68e9 EA |
3063 | if (obj_priv->page_cpu_valid == NULL) |
3064 | return -ENOMEM; | |
3065 | } else if ((obj->read_domains & I915_GEM_DOMAIN_CPU) == 0) | |
3066 | memset(obj_priv->page_cpu_valid, 0, obj->size / PAGE_SIZE); | |
673a394b EA |
3067 | |
3068 | /* Flush the cache on any pages that are still invalid from the CPU's | |
3069 | * perspective. | |
3070 | */ | |
e47c68e9 EA |
3071 | for (i = offset / PAGE_SIZE; i <= (offset + size - 1) / PAGE_SIZE; |
3072 | i++) { | |
673a394b EA |
3073 | if (obj_priv->page_cpu_valid[i]) |
3074 | continue; | |
3075 | ||
856fa198 | 3076 | drm_clflush_pages(obj_priv->pages + i, 1); |
673a394b EA |
3077 | |
3078 | obj_priv->page_cpu_valid[i] = 1; | |
3079 | } | |
3080 | ||
e47c68e9 EA |
3081 | /* It should now be out of any other write domains, and we can update |
3082 | * the domain values for our changes. | |
3083 | */ | |
3084 | BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_CPU) != 0); | |
3085 | ||
3086 | obj->read_domains |= I915_GEM_DOMAIN_CPU; | |
3087 | ||
673a394b EA |
3088 | return 0; |
3089 | } | |
3090 | ||
673a394b EA |
3091 | /** |
3092 | * Pin an object to the GTT and evaluate the relocations landing in it. | |
3093 | */ | |
3094 | static int | |
3095 | i915_gem_object_pin_and_relocate(struct drm_gem_object *obj, | |
3096 | struct drm_file *file_priv, | |
40a5f0de EA |
3097 | struct drm_i915_gem_exec_object *entry, |
3098 | struct drm_i915_gem_relocation_entry *relocs) | |
673a394b EA |
3099 | { |
3100 | struct drm_device *dev = obj->dev; | |
0839ccb8 | 3101 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b EA |
3102 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
3103 | int i, ret; | |
0839ccb8 | 3104 | void __iomem *reloc_page; |
673a394b EA |
3105 | |
3106 | /* Choose the GTT offset for our buffer and put it there. */ | |
3107 | ret = i915_gem_object_pin(obj, (uint32_t) entry->alignment); | |
3108 | if (ret) | |
3109 | return ret; | |
3110 | ||
3111 | entry->offset = obj_priv->gtt_offset; | |
3112 | ||
673a394b EA |
3113 | /* Apply the relocations, using the GTT aperture to avoid cache |
3114 | * flushing requirements. | |
3115 | */ | |
3116 | for (i = 0; i < entry->relocation_count; i++) { | |
40a5f0de | 3117 | struct drm_i915_gem_relocation_entry *reloc= &relocs[i]; |
673a394b EA |
3118 | struct drm_gem_object *target_obj; |
3119 | struct drm_i915_gem_object *target_obj_priv; | |
3043c60c EA |
3120 | uint32_t reloc_val, reloc_offset; |
3121 | uint32_t __iomem *reloc_entry; | |
673a394b | 3122 | |
673a394b | 3123 | target_obj = drm_gem_object_lookup(obj->dev, file_priv, |
40a5f0de | 3124 | reloc->target_handle); |
673a394b EA |
3125 | if (target_obj == NULL) { |
3126 | i915_gem_object_unpin(obj); | |
3127 | return -EBADF; | |
3128 | } | |
3129 | target_obj_priv = target_obj->driver_private; | |
3130 | ||
3131 | /* The target buffer should have appeared before us in the | |
3132 | * exec_object list, so it should have a GTT space bound by now. | |
3133 | */ | |
3134 | if (target_obj_priv->gtt_space == NULL) { | |
3135 | DRM_ERROR("No GTT space found for object %d\n", | |
40a5f0de | 3136 | reloc->target_handle); |
673a394b EA |
3137 | drm_gem_object_unreference(target_obj); |
3138 | i915_gem_object_unpin(obj); | |
3139 | return -EINVAL; | |
3140 | } | |
3141 | ||
40a5f0de | 3142 | if (reloc->offset > obj->size - 4) { |
673a394b EA |
3143 | DRM_ERROR("Relocation beyond object bounds: " |
3144 | "obj %p target %d offset %d size %d.\n", | |
40a5f0de EA |
3145 | obj, reloc->target_handle, |
3146 | (int) reloc->offset, (int) obj->size); | |
673a394b EA |
3147 | drm_gem_object_unreference(target_obj); |
3148 | i915_gem_object_unpin(obj); | |
3149 | return -EINVAL; | |
3150 | } | |
40a5f0de | 3151 | if (reloc->offset & 3) { |
673a394b EA |
3152 | DRM_ERROR("Relocation not 4-byte aligned: " |
3153 | "obj %p target %d offset %d.\n", | |
40a5f0de EA |
3154 | obj, reloc->target_handle, |
3155 | (int) reloc->offset); | |
673a394b EA |
3156 | drm_gem_object_unreference(target_obj); |
3157 | i915_gem_object_unpin(obj); | |
cd0b9fb4 CW |
3158 | return -EINVAL; |
3159 | } | |
3160 | ||
3161 | if (reloc->delta >= target_obj->size) { | |
3162 | DRM_ERROR("Relocation beyond target object bounds: " | |
3163 | "obj %p target %d delta %d size %d.\n", | |
3164 | obj, reloc->target_handle, | |
3165 | (int) reloc->delta, (int) target_obj->size); | |
3166 | drm_gem_object_unreference(target_obj); | |
3167 | i915_gem_object_unpin(obj); | |
673a394b EA |
3168 | return -EINVAL; |
3169 | } | |
3170 | ||
40a5f0de EA |
3171 | if (reloc->write_domain & I915_GEM_DOMAIN_CPU || |
3172 | reloc->read_domains & I915_GEM_DOMAIN_CPU) { | |
e47c68e9 EA |
3173 | DRM_ERROR("reloc with read/write CPU domains: " |
3174 | "obj %p target %d offset %d " | |
3175 | "read %08x write %08x", | |
40a5f0de EA |
3176 | obj, reloc->target_handle, |
3177 | (int) reloc->offset, | |
3178 | reloc->read_domains, | |
3179 | reloc->write_domain); | |
491152b8 CW |
3180 | drm_gem_object_unreference(target_obj); |
3181 | i915_gem_object_unpin(obj); | |
e47c68e9 EA |
3182 | return -EINVAL; |
3183 | } | |
3184 | ||
40a5f0de EA |
3185 | if (reloc->write_domain && target_obj->pending_write_domain && |
3186 | reloc->write_domain != target_obj->pending_write_domain) { | |
673a394b EA |
3187 | DRM_ERROR("Write domain conflict: " |
3188 | "obj %p target %d offset %d " | |
3189 | "new %08x old %08x\n", | |
40a5f0de EA |
3190 | obj, reloc->target_handle, |
3191 | (int) reloc->offset, | |
3192 | reloc->write_domain, | |
673a394b EA |
3193 | target_obj->pending_write_domain); |
3194 | drm_gem_object_unreference(target_obj); | |
3195 | i915_gem_object_unpin(obj); | |
3196 | return -EINVAL; | |
3197 | } | |
3198 | ||
3199 | #if WATCH_RELOC | |
3200 | DRM_INFO("%s: obj %p offset %08x target %d " | |
3201 | "read %08x write %08x gtt %08x " | |
3202 | "presumed %08x delta %08x\n", | |
3203 | __func__, | |
3204 | obj, | |
40a5f0de EA |
3205 | (int) reloc->offset, |
3206 | (int) reloc->target_handle, | |
3207 | (int) reloc->read_domains, | |
3208 | (int) reloc->write_domain, | |
673a394b | 3209 | (int) target_obj_priv->gtt_offset, |
40a5f0de EA |
3210 | (int) reloc->presumed_offset, |
3211 | reloc->delta); | |
673a394b EA |
3212 | #endif |
3213 | ||
40a5f0de EA |
3214 | target_obj->pending_read_domains |= reloc->read_domains; |
3215 | target_obj->pending_write_domain |= reloc->write_domain; | |
673a394b EA |
3216 | |
3217 | /* If the relocation already has the right value in it, no | |
3218 | * more work needs to be done. | |
3219 | */ | |
40a5f0de | 3220 | if (target_obj_priv->gtt_offset == reloc->presumed_offset) { |
673a394b EA |
3221 | drm_gem_object_unreference(target_obj); |
3222 | continue; | |
3223 | } | |
3224 | ||
2ef7eeaa EA |
3225 | ret = i915_gem_object_set_to_gtt_domain(obj, 1); |
3226 | if (ret != 0) { | |
3227 | drm_gem_object_unreference(target_obj); | |
3228 | i915_gem_object_unpin(obj); | |
3229 | return -EINVAL; | |
673a394b EA |
3230 | } |
3231 | ||
3232 | /* Map the page containing the relocation we're going to | |
3233 | * perform. | |
3234 | */ | |
40a5f0de | 3235 | reloc_offset = obj_priv->gtt_offset + reloc->offset; |
0839ccb8 KP |
3236 | reloc_page = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping, |
3237 | (reloc_offset & | |
3238 | ~(PAGE_SIZE - 1))); | |
3043c60c | 3239 | reloc_entry = (uint32_t __iomem *)(reloc_page + |
0839ccb8 | 3240 | (reloc_offset & (PAGE_SIZE - 1))); |
40a5f0de | 3241 | reloc_val = target_obj_priv->gtt_offset + reloc->delta; |
673a394b EA |
3242 | |
3243 | #if WATCH_BUF | |
3244 | DRM_INFO("Applied relocation: %p@0x%08x %08x -> %08x\n", | |
40a5f0de | 3245 | obj, (unsigned int) reloc->offset, |
673a394b EA |
3246 | readl(reloc_entry), reloc_val); |
3247 | #endif | |
3248 | writel(reloc_val, reloc_entry); | |
0839ccb8 | 3249 | io_mapping_unmap_atomic(reloc_page); |
673a394b | 3250 | |
40a5f0de EA |
3251 | /* The updated presumed offset for this entry will be |
3252 | * copied back out to the user. | |
673a394b | 3253 | */ |
40a5f0de | 3254 | reloc->presumed_offset = target_obj_priv->gtt_offset; |
673a394b EA |
3255 | |
3256 | drm_gem_object_unreference(target_obj); | |
3257 | } | |
3258 | ||
673a394b EA |
3259 | #if WATCH_BUF |
3260 | if (0) | |
3261 | i915_gem_dump_object(obj, 128, __func__, ~0); | |
3262 | #endif | |
3263 | return 0; | |
3264 | } | |
3265 | ||
3266 | /** Dispatch a batchbuffer to the ring | |
3267 | */ | |
3268 | static int | |
3269 | i915_dispatch_gem_execbuffer(struct drm_device *dev, | |
3270 | struct drm_i915_gem_execbuffer *exec, | |
201361a5 | 3271 | struct drm_clip_rect *cliprects, |
673a394b EA |
3272 | uint64_t exec_offset) |
3273 | { | |
3274 | drm_i915_private_t *dev_priv = dev->dev_private; | |
673a394b EA |
3275 | int nbox = exec->num_cliprects; |
3276 | int i = 0, count; | |
83d60795 | 3277 | uint32_t exec_start, exec_len; |
673a394b EA |
3278 | RING_LOCALS; |
3279 | ||
3280 | exec_start = (uint32_t) exec_offset + exec->batch_start_offset; | |
3281 | exec_len = (uint32_t) exec->batch_len; | |
3282 | ||
673a394b EA |
3283 | count = nbox ? nbox : 1; |
3284 | ||
3285 | for (i = 0; i < count; i++) { | |
3286 | if (i < nbox) { | |
201361a5 | 3287 | int ret = i915_emit_box(dev, cliprects, i, |
673a394b EA |
3288 | exec->DR1, exec->DR4); |
3289 | if (ret) | |
3290 | return ret; | |
3291 | } | |
3292 | ||
3293 | if (IS_I830(dev) || IS_845G(dev)) { | |
3294 | BEGIN_LP_RING(4); | |
3295 | OUT_RING(MI_BATCH_BUFFER); | |
3296 | OUT_RING(exec_start | MI_BATCH_NON_SECURE); | |
3297 | OUT_RING(exec_start + exec_len - 4); | |
3298 | OUT_RING(0); | |
3299 | ADVANCE_LP_RING(); | |
3300 | } else { | |
3301 | BEGIN_LP_RING(2); | |
3302 | if (IS_I965G(dev)) { | |
3303 | OUT_RING(MI_BATCH_BUFFER_START | | |
3304 | (2 << 6) | | |
3305 | MI_BATCH_NON_SECURE_I965); | |
3306 | OUT_RING(exec_start); | |
3307 | } else { | |
3308 | OUT_RING(MI_BATCH_BUFFER_START | | |
3309 | (2 << 6)); | |
3310 | OUT_RING(exec_start | MI_BATCH_NON_SECURE); | |
3311 | } | |
3312 | ADVANCE_LP_RING(); | |
3313 | } | |
3314 | } | |
3315 | ||
3316 | /* XXX breadcrumb */ | |
3317 | return 0; | |
3318 | } | |
3319 | ||
3320 | /* Throttle our rendering by waiting until the ring has completed our requests | |
3321 | * emitted over 20 msec ago. | |
3322 | * | |
b962442e EA |
3323 | * Note that if we were to use the current jiffies each time around the loop, |
3324 | * we wouldn't escape the function with any frames outstanding if the time to | |
3325 | * render a frame was over 20ms. | |
3326 | * | |
673a394b EA |
3327 | * This should get us reasonable parallelism between CPU and GPU but also |
3328 | * relatively low latency when blocking on a particular request to finish. | |
3329 | */ | |
3330 | static int | |
3331 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file_priv) | |
3332 | { | |
3333 | struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv; | |
3334 | int ret = 0; | |
b962442e | 3335 | unsigned long recent_enough = jiffies - msecs_to_jiffies(20); |
673a394b EA |
3336 | |
3337 | mutex_lock(&dev->struct_mutex); | |
b962442e EA |
3338 | while (!list_empty(&i915_file_priv->mm.request_list)) { |
3339 | struct drm_i915_gem_request *request; | |
3340 | ||
3341 | request = list_first_entry(&i915_file_priv->mm.request_list, | |
3342 | struct drm_i915_gem_request, | |
3343 | client_list); | |
3344 | ||
3345 | if (time_after_eq(request->emitted_jiffies, recent_enough)) | |
3346 | break; | |
3347 | ||
3348 | ret = i915_wait_request(dev, request->seqno); | |
3349 | if (ret != 0) | |
3350 | break; | |
3351 | } | |
673a394b | 3352 | mutex_unlock(&dev->struct_mutex); |
b962442e | 3353 | |
673a394b EA |
3354 | return ret; |
3355 | } | |
3356 | ||
40a5f0de EA |
3357 | static int |
3358 | i915_gem_get_relocs_from_user(struct drm_i915_gem_exec_object *exec_list, | |
3359 | uint32_t buffer_count, | |
3360 | struct drm_i915_gem_relocation_entry **relocs) | |
3361 | { | |
3362 | uint32_t reloc_count = 0, reloc_index = 0, i; | |
3363 | int ret; | |
3364 | ||
3365 | *relocs = NULL; | |
3366 | for (i = 0; i < buffer_count; i++) { | |
3367 | if (reloc_count + exec_list[i].relocation_count < reloc_count) | |
3368 | return -EINVAL; | |
3369 | reloc_count += exec_list[i].relocation_count; | |
3370 | } | |
3371 | ||
8e7d2b2c | 3372 | *relocs = drm_calloc_large(reloc_count, sizeof(**relocs)); |
40a5f0de EA |
3373 | if (*relocs == NULL) |
3374 | return -ENOMEM; | |
3375 | ||
3376 | for (i = 0; i < buffer_count; i++) { | |
3377 | struct drm_i915_gem_relocation_entry __user *user_relocs; | |
3378 | ||
3379 | user_relocs = (void __user *)(uintptr_t)exec_list[i].relocs_ptr; | |
3380 | ||
3381 | ret = copy_from_user(&(*relocs)[reloc_index], | |
3382 | user_relocs, | |
3383 | exec_list[i].relocation_count * | |
3384 | sizeof(**relocs)); | |
3385 | if (ret != 0) { | |
8e7d2b2c | 3386 | drm_free_large(*relocs); |
40a5f0de | 3387 | *relocs = NULL; |
2bc43b5c | 3388 | return -EFAULT; |
40a5f0de EA |
3389 | } |
3390 | ||
3391 | reloc_index += exec_list[i].relocation_count; | |
3392 | } | |
3393 | ||
2bc43b5c | 3394 | return 0; |
40a5f0de EA |
3395 | } |
3396 | ||
3397 | static int | |
3398 | i915_gem_put_relocs_to_user(struct drm_i915_gem_exec_object *exec_list, | |
3399 | uint32_t buffer_count, | |
3400 | struct drm_i915_gem_relocation_entry *relocs) | |
3401 | { | |
3402 | uint32_t reloc_count = 0, i; | |
2bc43b5c | 3403 | int ret = 0; |
40a5f0de EA |
3404 | |
3405 | for (i = 0; i < buffer_count; i++) { | |
3406 | struct drm_i915_gem_relocation_entry __user *user_relocs; | |
2bc43b5c | 3407 | int unwritten; |
40a5f0de EA |
3408 | |
3409 | user_relocs = (void __user *)(uintptr_t)exec_list[i].relocs_ptr; | |
3410 | ||
2bc43b5c FM |
3411 | unwritten = copy_to_user(user_relocs, |
3412 | &relocs[reloc_count], | |
3413 | exec_list[i].relocation_count * | |
3414 | sizeof(*relocs)); | |
3415 | ||
3416 | if (unwritten) { | |
3417 | ret = -EFAULT; | |
3418 | goto err; | |
40a5f0de EA |
3419 | } |
3420 | ||
3421 | reloc_count += exec_list[i].relocation_count; | |
3422 | } | |
3423 | ||
2bc43b5c | 3424 | err: |
8e7d2b2c | 3425 | drm_free_large(relocs); |
40a5f0de EA |
3426 | |
3427 | return ret; | |
3428 | } | |
3429 | ||
83d60795 CW |
3430 | static int |
3431 | i915_gem_check_execbuffer (struct drm_i915_gem_execbuffer *exec, | |
3432 | uint64_t exec_offset) | |
3433 | { | |
3434 | uint32_t exec_start, exec_len; | |
3435 | ||
3436 | exec_start = (uint32_t) exec_offset + exec->batch_start_offset; | |
3437 | exec_len = (uint32_t) exec->batch_len; | |
3438 | ||
3439 | if ((exec_start | exec_len) & 0x7) | |
3440 | return -EINVAL; | |
3441 | ||
3442 | if (!exec_start) | |
3443 | return -EINVAL; | |
3444 | ||
3445 | return 0; | |
3446 | } | |
3447 | ||
673a394b EA |
3448 | int |
3449 | i915_gem_execbuffer(struct drm_device *dev, void *data, | |
3450 | struct drm_file *file_priv) | |
3451 | { | |
3452 | drm_i915_private_t *dev_priv = dev->dev_private; | |
673a394b EA |
3453 | struct drm_i915_gem_execbuffer *args = data; |
3454 | struct drm_i915_gem_exec_object *exec_list = NULL; | |
3455 | struct drm_gem_object **object_list = NULL; | |
3456 | struct drm_gem_object *batch_obj; | |
b70d11da | 3457 | struct drm_i915_gem_object *obj_priv; |
201361a5 | 3458 | struct drm_clip_rect *cliprects = NULL; |
40a5f0de EA |
3459 | struct drm_i915_gem_relocation_entry *relocs; |
3460 | int ret, ret2, i, pinned = 0; | |
673a394b | 3461 | uint64_t exec_offset; |
40a5f0de | 3462 | uint32_t seqno, flush_domains, reloc_index; |
ac94a962 | 3463 | int pin_tries; |
673a394b EA |
3464 | |
3465 | #if WATCH_EXEC | |
3466 | DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n", | |
3467 | (int) args->buffers_ptr, args->buffer_count, args->batch_len); | |
3468 | #endif | |
3469 | ||
4f481ed2 EA |
3470 | if (args->buffer_count < 1) { |
3471 | DRM_ERROR("execbuf with %d buffers\n", args->buffer_count); | |
3472 | return -EINVAL; | |
3473 | } | |
673a394b | 3474 | /* Copy in the exec list from userland */ |
8e7d2b2c JB |
3475 | exec_list = drm_calloc_large(sizeof(*exec_list), args->buffer_count); |
3476 | object_list = drm_calloc_large(sizeof(*object_list), args->buffer_count); | |
673a394b EA |
3477 | if (exec_list == NULL || object_list == NULL) { |
3478 | DRM_ERROR("Failed to allocate exec or object list " | |
3479 | "for %d buffers\n", | |
3480 | args->buffer_count); | |
3481 | ret = -ENOMEM; | |
3482 | goto pre_mutex_err; | |
3483 | } | |
3484 | ret = copy_from_user(exec_list, | |
3485 | (struct drm_i915_relocation_entry __user *) | |
3486 | (uintptr_t) args->buffers_ptr, | |
3487 | sizeof(*exec_list) * args->buffer_count); | |
3488 | if (ret != 0) { | |
3489 | DRM_ERROR("copy %d exec entries failed %d\n", | |
3490 | args->buffer_count, ret); | |
3491 | goto pre_mutex_err; | |
3492 | } | |
3493 | ||
201361a5 | 3494 | if (args->num_cliprects != 0) { |
9a298b2a EA |
3495 | cliprects = kcalloc(args->num_cliprects, sizeof(*cliprects), |
3496 | GFP_KERNEL); | |
201361a5 EA |
3497 | if (cliprects == NULL) |
3498 | goto pre_mutex_err; | |
3499 | ||
3500 | ret = copy_from_user(cliprects, | |
3501 | (struct drm_clip_rect __user *) | |
3502 | (uintptr_t) args->cliprects_ptr, | |
3503 | sizeof(*cliprects) * args->num_cliprects); | |
3504 | if (ret != 0) { | |
3505 | DRM_ERROR("copy %d cliprects failed: %d\n", | |
3506 | args->num_cliprects, ret); | |
3507 | goto pre_mutex_err; | |
3508 | } | |
3509 | } | |
3510 | ||
40a5f0de EA |
3511 | ret = i915_gem_get_relocs_from_user(exec_list, args->buffer_count, |
3512 | &relocs); | |
3513 | if (ret != 0) | |
3514 | goto pre_mutex_err; | |
3515 | ||
673a394b EA |
3516 | mutex_lock(&dev->struct_mutex); |
3517 | ||
3518 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3519 | ||
ba1234d1 | 3520 | if (atomic_read(&dev_priv->mm.wedged)) { |
673a394b EA |
3521 | DRM_ERROR("Execbuf while wedged\n"); |
3522 | mutex_unlock(&dev->struct_mutex); | |
a198bc80 CW |
3523 | ret = -EIO; |
3524 | goto pre_mutex_err; | |
673a394b EA |
3525 | } |
3526 | ||
3527 | if (dev_priv->mm.suspended) { | |
3528 | DRM_ERROR("Execbuf while VT-switched.\n"); | |
3529 | mutex_unlock(&dev->struct_mutex); | |
a198bc80 CW |
3530 | ret = -EBUSY; |
3531 | goto pre_mutex_err; | |
673a394b EA |
3532 | } |
3533 | ||
ac94a962 | 3534 | /* Look up object handles */ |
673a394b EA |
3535 | for (i = 0; i < args->buffer_count; i++) { |
3536 | object_list[i] = drm_gem_object_lookup(dev, file_priv, | |
3537 | exec_list[i].handle); | |
3538 | if (object_list[i] == NULL) { | |
3539 | DRM_ERROR("Invalid object handle %d at index %d\n", | |
3540 | exec_list[i].handle, i); | |
3541 | ret = -EBADF; | |
3542 | goto err; | |
3543 | } | |
b70d11da KH |
3544 | |
3545 | obj_priv = object_list[i]->driver_private; | |
3546 | if (obj_priv->in_execbuffer) { | |
3547 | DRM_ERROR("Object %p appears more than once in object list\n", | |
3548 | object_list[i]); | |
3549 | ret = -EBADF; | |
3550 | goto err; | |
3551 | } | |
3552 | obj_priv->in_execbuffer = true; | |
ac94a962 | 3553 | } |
673a394b | 3554 | |
ac94a962 KP |
3555 | /* Pin and relocate */ |
3556 | for (pin_tries = 0; ; pin_tries++) { | |
3557 | ret = 0; | |
40a5f0de EA |
3558 | reloc_index = 0; |
3559 | ||
ac94a962 KP |
3560 | for (i = 0; i < args->buffer_count; i++) { |
3561 | object_list[i]->pending_read_domains = 0; | |
3562 | object_list[i]->pending_write_domain = 0; | |
3563 | ret = i915_gem_object_pin_and_relocate(object_list[i], | |
3564 | file_priv, | |
40a5f0de EA |
3565 | &exec_list[i], |
3566 | &relocs[reloc_index]); | |
ac94a962 KP |
3567 | if (ret) |
3568 | break; | |
3569 | pinned = i + 1; | |
40a5f0de | 3570 | reloc_index += exec_list[i].relocation_count; |
ac94a962 KP |
3571 | } |
3572 | /* success */ | |
3573 | if (ret == 0) | |
3574 | break; | |
3575 | ||
3576 | /* error other than GTT full, or we've already tried again */ | |
2939e1f5 | 3577 | if (ret != -ENOSPC || pin_tries >= 1) { |
07f73f69 CW |
3578 | if (ret != -ERESTARTSYS) { |
3579 | unsigned long long total_size = 0; | |
3580 | for (i = 0; i < args->buffer_count; i++) | |
3581 | total_size += object_list[i]->size; | |
3582 | DRM_ERROR("Failed to pin buffer %d of %d, total %llu bytes: %d\n", | |
3583 | pinned+1, args->buffer_count, | |
3584 | total_size, ret); | |
3585 | DRM_ERROR("%d objects [%d pinned], " | |
3586 | "%d object bytes [%d pinned], " | |
3587 | "%d/%d gtt bytes\n", | |
3588 | atomic_read(&dev->object_count), | |
3589 | atomic_read(&dev->pin_count), | |
3590 | atomic_read(&dev->object_memory), | |
3591 | atomic_read(&dev->pin_memory), | |
3592 | atomic_read(&dev->gtt_memory), | |
3593 | dev->gtt_total); | |
3594 | } | |
673a394b EA |
3595 | goto err; |
3596 | } | |
ac94a962 KP |
3597 | |
3598 | /* unpin all of our buffers */ | |
3599 | for (i = 0; i < pinned; i++) | |
3600 | i915_gem_object_unpin(object_list[i]); | |
b1177636 | 3601 | pinned = 0; |
ac94a962 KP |
3602 | |
3603 | /* evict everyone we can from the aperture */ | |
3604 | ret = i915_gem_evict_everything(dev); | |
07f73f69 | 3605 | if (ret && ret != -ENOSPC) |
ac94a962 | 3606 | goto err; |
673a394b EA |
3607 | } |
3608 | ||
3609 | /* Set the pending read domains for the batch buffer to COMMAND */ | |
3610 | batch_obj = object_list[args->buffer_count-1]; | |
5f26a2c7 CW |
3611 | if (batch_obj->pending_write_domain) { |
3612 | DRM_ERROR("Attempting to use self-modifying batch buffer\n"); | |
3613 | ret = -EINVAL; | |
3614 | goto err; | |
3615 | } | |
3616 | batch_obj->pending_read_domains |= I915_GEM_DOMAIN_COMMAND; | |
673a394b | 3617 | |
83d60795 CW |
3618 | /* Sanity check the batch buffer, prior to moving objects */ |
3619 | exec_offset = exec_list[args->buffer_count - 1].offset; | |
3620 | ret = i915_gem_check_execbuffer (args, exec_offset); | |
3621 | if (ret != 0) { | |
3622 | DRM_ERROR("execbuf with invalid offset/length\n"); | |
3623 | goto err; | |
3624 | } | |
3625 | ||
673a394b EA |
3626 | i915_verify_inactive(dev, __FILE__, __LINE__); |
3627 | ||
646f0f6e KP |
3628 | /* Zero the global flush/invalidate flags. These |
3629 | * will be modified as new domains are computed | |
3630 | * for each object | |
3631 | */ | |
3632 | dev->invalidate_domains = 0; | |
3633 | dev->flush_domains = 0; | |
3634 | ||
673a394b EA |
3635 | for (i = 0; i < args->buffer_count; i++) { |
3636 | struct drm_gem_object *obj = object_list[i]; | |
673a394b | 3637 | |
646f0f6e | 3638 | /* Compute new gpu domains and update invalidate/flush */ |
8b0e378a | 3639 | i915_gem_object_set_to_gpu_domain(obj); |
673a394b EA |
3640 | } |
3641 | ||
3642 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3643 | ||
646f0f6e KP |
3644 | if (dev->invalidate_domains | dev->flush_domains) { |
3645 | #if WATCH_EXEC | |
3646 | DRM_INFO("%s: invalidate_domains %08x flush_domains %08x\n", | |
3647 | __func__, | |
3648 | dev->invalidate_domains, | |
3649 | dev->flush_domains); | |
3650 | #endif | |
3651 | i915_gem_flush(dev, | |
3652 | dev->invalidate_domains, | |
3653 | dev->flush_domains); | |
3654 | if (dev->flush_domains) | |
b962442e EA |
3655 | (void)i915_add_request(dev, file_priv, |
3656 | dev->flush_domains); | |
646f0f6e | 3657 | } |
673a394b | 3658 | |
efbeed96 EA |
3659 | for (i = 0; i < args->buffer_count; i++) { |
3660 | struct drm_gem_object *obj = object_list[i]; | |
3661 | ||
3662 | obj->write_domain = obj->pending_write_domain; | |
3663 | } | |
3664 | ||
673a394b EA |
3665 | i915_verify_inactive(dev, __FILE__, __LINE__); |
3666 | ||
3667 | #if WATCH_COHERENCY | |
3668 | for (i = 0; i < args->buffer_count; i++) { | |
3669 | i915_gem_object_check_coherency(object_list[i], | |
3670 | exec_list[i].handle); | |
3671 | } | |
3672 | #endif | |
3673 | ||
673a394b | 3674 | #if WATCH_EXEC |
6911a9b8 | 3675 | i915_gem_dump_object(batch_obj, |
673a394b EA |
3676 | args->batch_len, |
3677 | __func__, | |
3678 | ~0); | |
3679 | #endif | |
3680 | ||
673a394b | 3681 | /* Exec the batchbuffer */ |
201361a5 | 3682 | ret = i915_dispatch_gem_execbuffer(dev, args, cliprects, exec_offset); |
673a394b EA |
3683 | if (ret) { |
3684 | DRM_ERROR("dispatch failed %d\n", ret); | |
3685 | goto err; | |
3686 | } | |
3687 | ||
3688 | /* | |
3689 | * Ensure that the commands in the batch buffer are | |
3690 | * finished before the interrupt fires | |
3691 | */ | |
3692 | flush_domains = i915_retire_commands(dev); | |
3693 | ||
3694 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3695 | ||
3696 | /* | |
3697 | * Get a seqno representing the execution of the current buffer, | |
3698 | * which we can wait on. We would like to mitigate these interrupts, | |
3699 | * likely by only creating seqnos occasionally (so that we have | |
3700 | * *some* interrupts representing completion of buffers that we can | |
3701 | * wait on when trying to clear up gtt space). | |
3702 | */ | |
b962442e | 3703 | seqno = i915_add_request(dev, file_priv, flush_domains); |
673a394b | 3704 | BUG_ON(seqno == 0); |
673a394b EA |
3705 | for (i = 0; i < args->buffer_count; i++) { |
3706 | struct drm_gem_object *obj = object_list[i]; | |
673a394b | 3707 | |
ce44b0ea | 3708 | i915_gem_object_move_to_active(obj, seqno); |
673a394b EA |
3709 | #if WATCH_LRU |
3710 | DRM_INFO("%s: move to exec list %p\n", __func__, obj); | |
3711 | #endif | |
3712 | } | |
3713 | #if WATCH_LRU | |
3714 | i915_dump_lru(dev, __func__); | |
3715 | #endif | |
3716 | ||
3717 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3718 | ||
673a394b | 3719 | err: |
aad87dff JL |
3720 | for (i = 0; i < pinned; i++) |
3721 | i915_gem_object_unpin(object_list[i]); | |
3722 | ||
b70d11da KH |
3723 | for (i = 0; i < args->buffer_count; i++) { |
3724 | if (object_list[i]) { | |
3725 | obj_priv = object_list[i]->driver_private; | |
3726 | obj_priv->in_execbuffer = false; | |
3727 | } | |
aad87dff | 3728 | drm_gem_object_unreference(object_list[i]); |
b70d11da | 3729 | } |
673a394b | 3730 | |
673a394b EA |
3731 | mutex_unlock(&dev->struct_mutex); |
3732 | ||
a35f2e2b RD |
3733 | if (!ret) { |
3734 | /* Copy the new buffer offsets back to the user's exec list. */ | |
3735 | ret = copy_to_user((struct drm_i915_relocation_entry __user *) | |
3736 | (uintptr_t) args->buffers_ptr, | |
3737 | exec_list, | |
3738 | sizeof(*exec_list) * args->buffer_count); | |
2bc43b5c FM |
3739 | if (ret) { |
3740 | ret = -EFAULT; | |
a35f2e2b RD |
3741 | DRM_ERROR("failed to copy %d exec entries " |
3742 | "back to user (%d)\n", | |
3743 | args->buffer_count, ret); | |
2bc43b5c | 3744 | } |
a35f2e2b RD |
3745 | } |
3746 | ||
40a5f0de EA |
3747 | /* Copy the updated relocations out regardless of current error |
3748 | * state. Failure to update the relocs would mean that the next | |
3749 | * time userland calls execbuf, it would do so with presumed offset | |
3750 | * state that didn't match the actual object state. | |
3751 | */ | |
3752 | ret2 = i915_gem_put_relocs_to_user(exec_list, args->buffer_count, | |
3753 | relocs); | |
3754 | if (ret2 != 0) { | |
3755 | DRM_ERROR("Failed to copy relocations back out: %d\n", ret2); | |
3756 | ||
3757 | if (ret == 0) | |
3758 | ret = ret2; | |
3759 | } | |
3760 | ||
673a394b | 3761 | pre_mutex_err: |
8e7d2b2c JB |
3762 | drm_free_large(object_list); |
3763 | drm_free_large(exec_list); | |
9a298b2a | 3764 | kfree(cliprects); |
673a394b EA |
3765 | |
3766 | return ret; | |
3767 | } | |
3768 | ||
3769 | int | |
3770 | i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment) | |
3771 | { | |
3772 | struct drm_device *dev = obj->dev; | |
3773 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
3774 | int ret; | |
3775 | ||
3776 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3777 | if (obj_priv->gtt_space == NULL) { | |
3778 | ret = i915_gem_object_bind_to_gtt(obj, alignment); | |
3779 | if (ret != 0) { | |
9bb2d6f9 | 3780 | if (ret != -EBUSY && ret != -ERESTARTSYS) |
0fce81e3 | 3781 | DRM_ERROR("Failure to bind: %d\n", ret); |
673a394b EA |
3782 | return ret; |
3783 | } | |
22c344e9 CW |
3784 | } |
3785 | /* | |
3786 | * Pre-965 chips need a fence register set up in order to | |
3787 | * properly handle tiled surfaces. | |
3788 | */ | |
a09ba7fa | 3789 | if (!IS_I965G(dev) && obj_priv->tiling_mode != I915_TILING_NONE) { |
8c4b8c3f | 3790 | ret = i915_gem_object_get_fence_reg(obj); |
22c344e9 CW |
3791 | if (ret != 0) { |
3792 | if (ret != -EBUSY && ret != -ERESTARTSYS) | |
3793 | DRM_ERROR("Failure to install fence: %d\n", | |
3794 | ret); | |
3795 | return ret; | |
3796 | } | |
673a394b EA |
3797 | } |
3798 | obj_priv->pin_count++; | |
3799 | ||
3800 | /* If the object is not active and not pending a flush, | |
3801 | * remove it from the inactive list | |
3802 | */ | |
3803 | if (obj_priv->pin_count == 1) { | |
3804 | atomic_inc(&dev->pin_count); | |
3805 | atomic_add(obj->size, &dev->pin_memory); | |
3806 | if (!obj_priv->active && | |
21d509e3 | 3807 | (obj->write_domain & I915_GEM_GPU_DOMAINS) == 0 && |
673a394b EA |
3808 | !list_empty(&obj_priv->list)) |
3809 | list_del_init(&obj_priv->list); | |
3810 | } | |
3811 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3812 | ||
3813 | return 0; | |
3814 | } | |
3815 | ||
3816 | void | |
3817 | i915_gem_object_unpin(struct drm_gem_object *obj) | |
3818 | { | |
3819 | struct drm_device *dev = obj->dev; | |
3820 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3821 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
3822 | ||
3823 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3824 | obj_priv->pin_count--; | |
3825 | BUG_ON(obj_priv->pin_count < 0); | |
3826 | BUG_ON(obj_priv->gtt_space == NULL); | |
3827 | ||
3828 | /* If the object is no longer pinned, and is | |
3829 | * neither active nor being flushed, then stick it on | |
3830 | * the inactive list | |
3831 | */ | |
3832 | if (obj_priv->pin_count == 0) { | |
3833 | if (!obj_priv->active && | |
21d509e3 | 3834 | (obj->write_domain & I915_GEM_GPU_DOMAINS) == 0) |
673a394b EA |
3835 | list_move_tail(&obj_priv->list, |
3836 | &dev_priv->mm.inactive_list); | |
3837 | atomic_dec(&dev->pin_count); | |
3838 | atomic_sub(obj->size, &dev->pin_memory); | |
3839 | } | |
3840 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3841 | } | |
3842 | ||
3843 | int | |
3844 | i915_gem_pin_ioctl(struct drm_device *dev, void *data, | |
3845 | struct drm_file *file_priv) | |
3846 | { | |
3847 | struct drm_i915_gem_pin *args = data; | |
3848 | struct drm_gem_object *obj; | |
3849 | struct drm_i915_gem_object *obj_priv; | |
3850 | int ret; | |
3851 | ||
3852 | mutex_lock(&dev->struct_mutex); | |
3853 | ||
3854 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
3855 | if (obj == NULL) { | |
3856 | DRM_ERROR("Bad handle in i915_gem_pin_ioctl(): %d\n", | |
3857 | args->handle); | |
3858 | mutex_unlock(&dev->struct_mutex); | |
3859 | return -EBADF; | |
3860 | } | |
3861 | obj_priv = obj->driver_private; | |
3862 | ||
3ef94daa CW |
3863 | if (obj_priv->madv == I915_MADV_DONTNEED) { |
3864 | DRM_ERROR("Attempting to pin a I915_MADV_DONTNEED buffer\n"); | |
3865 | drm_gem_object_unreference(obj); | |
3866 | mutex_unlock(&dev->struct_mutex); | |
3867 | return -EINVAL; | |
3868 | } | |
3869 | ||
79e53945 JB |
3870 | if (obj_priv->pin_filp != NULL && obj_priv->pin_filp != file_priv) { |
3871 | DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n", | |
3872 | args->handle); | |
96dec61d | 3873 | drm_gem_object_unreference(obj); |
673a394b | 3874 | mutex_unlock(&dev->struct_mutex); |
79e53945 JB |
3875 | return -EINVAL; |
3876 | } | |
3877 | ||
3878 | obj_priv->user_pin_count++; | |
3879 | obj_priv->pin_filp = file_priv; | |
3880 | if (obj_priv->user_pin_count == 1) { | |
3881 | ret = i915_gem_object_pin(obj, args->alignment); | |
3882 | if (ret != 0) { | |
3883 | drm_gem_object_unreference(obj); | |
3884 | mutex_unlock(&dev->struct_mutex); | |
3885 | return ret; | |
3886 | } | |
673a394b EA |
3887 | } |
3888 | ||
3889 | /* XXX - flush the CPU caches for pinned objects | |
3890 | * as the X server doesn't manage domains yet | |
3891 | */ | |
e47c68e9 | 3892 | i915_gem_object_flush_cpu_write_domain(obj); |
673a394b EA |
3893 | args->offset = obj_priv->gtt_offset; |
3894 | drm_gem_object_unreference(obj); | |
3895 | mutex_unlock(&dev->struct_mutex); | |
3896 | ||
3897 | return 0; | |
3898 | } | |
3899 | ||
3900 | int | |
3901 | i915_gem_unpin_ioctl(struct drm_device *dev, void *data, | |
3902 | struct drm_file *file_priv) | |
3903 | { | |
3904 | struct drm_i915_gem_pin *args = data; | |
3905 | struct drm_gem_object *obj; | |
79e53945 | 3906 | struct drm_i915_gem_object *obj_priv; |
673a394b EA |
3907 | |
3908 | mutex_lock(&dev->struct_mutex); | |
3909 | ||
3910 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
3911 | if (obj == NULL) { | |
3912 | DRM_ERROR("Bad handle in i915_gem_unpin_ioctl(): %d\n", | |
3913 | args->handle); | |
3914 | mutex_unlock(&dev->struct_mutex); | |
3915 | return -EBADF; | |
3916 | } | |
3917 | ||
79e53945 JB |
3918 | obj_priv = obj->driver_private; |
3919 | if (obj_priv->pin_filp != file_priv) { | |
3920 | DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n", | |
3921 | args->handle); | |
3922 | drm_gem_object_unreference(obj); | |
3923 | mutex_unlock(&dev->struct_mutex); | |
3924 | return -EINVAL; | |
3925 | } | |
3926 | obj_priv->user_pin_count--; | |
3927 | if (obj_priv->user_pin_count == 0) { | |
3928 | obj_priv->pin_filp = NULL; | |
3929 | i915_gem_object_unpin(obj); | |
3930 | } | |
673a394b EA |
3931 | |
3932 | drm_gem_object_unreference(obj); | |
3933 | mutex_unlock(&dev->struct_mutex); | |
3934 | return 0; | |
3935 | } | |
3936 | ||
3937 | int | |
3938 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, | |
3939 | struct drm_file *file_priv) | |
3940 | { | |
3941 | struct drm_i915_gem_busy *args = data; | |
3942 | struct drm_gem_object *obj; | |
3943 | struct drm_i915_gem_object *obj_priv; | |
3944 | ||
673a394b EA |
3945 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
3946 | if (obj == NULL) { | |
3947 | DRM_ERROR("Bad handle in i915_gem_busy_ioctl(): %d\n", | |
3948 | args->handle); | |
673a394b EA |
3949 | return -EBADF; |
3950 | } | |
3951 | ||
b1ce786c | 3952 | mutex_lock(&dev->struct_mutex); |
f21289b3 EA |
3953 | /* Update the active list for the hardware's current position. |
3954 | * Otherwise this only updates on a delayed timer or when irqs are | |
3955 | * actually unmasked, and our working set ends up being larger than | |
3956 | * required. | |
3957 | */ | |
3958 | i915_gem_retire_requests(dev); | |
3959 | ||
673a394b | 3960 | obj_priv = obj->driver_private; |
c4de0a5d EA |
3961 | /* Don't count being on the flushing list against the object being |
3962 | * done. Otherwise, a buffer left on the flushing list but not getting | |
3963 | * flushed (because nobody's flushing that domain) won't ever return | |
3964 | * unbusy and get reused by libdrm's bo cache. The other expected | |
3965 | * consumer of this interface, OpenGL's occlusion queries, also specs | |
3966 | * that the objects get unbusy "eventually" without any interference. | |
3967 | */ | |
3968 | args->busy = obj_priv->active && obj_priv->last_rendering_seqno != 0; | |
673a394b EA |
3969 | |
3970 | drm_gem_object_unreference(obj); | |
3971 | mutex_unlock(&dev->struct_mutex); | |
3972 | return 0; | |
3973 | } | |
3974 | ||
3975 | int | |
3976 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, | |
3977 | struct drm_file *file_priv) | |
3978 | { | |
3979 | return i915_gem_ring_throttle(dev, file_priv); | |
3980 | } | |
3981 | ||
3ef94daa CW |
3982 | int |
3983 | i915_gem_madvise_ioctl(struct drm_device *dev, void *data, | |
3984 | struct drm_file *file_priv) | |
3985 | { | |
3986 | struct drm_i915_gem_madvise *args = data; | |
3987 | struct drm_gem_object *obj; | |
3988 | struct drm_i915_gem_object *obj_priv; | |
3989 | ||
3990 | switch (args->madv) { | |
3991 | case I915_MADV_DONTNEED: | |
3992 | case I915_MADV_WILLNEED: | |
3993 | break; | |
3994 | default: | |
3995 | return -EINVAL; | |
3996 | } | |
3997 | ||
3998 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
3999 | if (obj == NULL) { | |
4000 | DRM_ERROR("Bad handle in i915_gem_madvise_ioctl(): %d\n", | |
4001 | args->handle); | |
4002 | return -EBADF; | |
4003 | } | |
4004 | ||
4005 | mutex_lock(&dev->struct_mutex); | |
4006 | obj_priv = obj->driver_private; | |
4007 | ||
4008 | if (obj_priv->pin_count) { | |
4009 | drm_gem_object_unreference(obj); | |
4010 | mutex_unlock(&dev->struct_mutex); | |
4011 | ||
4012 | DRM_ERROR("Attempted i915_gem_madvise_ioctl() on a pinned object\n"); | |
4013 | return -EINVAL; | |
4014 | } | |
4015 | ||
4016 | obj_priv->madv = args->madv; | |
4017 | args->retained = obj_priv->gtt_space != NULL; | |
4018 | ||
4019 | drm_gem_object_unreference(obj); | |
4020 | mutex_unlock(&dev->struct_mutex); | |
4021 | ||
4022 | return 0; | |
4023 | } | |
4024 | ||
673a394b EA |
4025 | int i915_gem_init_object(struct drm_gem_object *obj) |
4026 | { | |
4027 | struct drm_i915_gem_object *obj_priv; | |
4028 | ||
9a298b2a | 4029 | obj_priv = kzalloc(sizeof(*obj_priv), GFP_KERNEL); |
673a394b EA |
4030 | if (obj_priv == NULL) |
4031 | return -ENOMEM; | |
4032 | ||
4033 | /* | |
4034 | * We've just allocated pages from the kernel, | |
4035 | * so they've just been written by the CPU with | |
4036 | * zeros. They'll need to be clflushed before we | |
4037 | * use them with the GPU. | |
4038 | */ | |
4039 | obj->write_domain = I915_GEM_DOMAIN_CPU; | |
4040 | obj->read_domains = I915_GEM_DOMAIN_CPU; | |
4041 | ||
ba1eb1d8 KP |
4042 | obj_priv->agp_type = AGP_USER_MEMORY; |
4043 | ||
673a394b EA |
4044 | obj->driver_private = obj_priv; |
4045 | obj_priv->obj = obj; | |
de151cf6 | 4046 | obj_priv->fence_reg = I915_FENCE_REG_NONE; |
673a394b | 4047 | INIT_LIST_HEAD(&obj_priv->list); |
a09ba7fa | 4048 | INIT_LIST_HEAD(&obj_priv->fence_list); |
3ef94daa | 4049 | obj_priv->madv = I915_MADV_WILLNEED; |
de151cf6 | 4050 | |
673a394b EA |
4051 | return 0; |
4052 | } | |
4053 | ||
4054 | void i915_gem_free_object(struct drm_gem_object *obj) | |
4055 | { | |
de151cf6 | 4056 | struct drm_device *dev = obj->dev; |
673a394b EA |
4057 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
4058 | ||
4059 | while (obj_priv->pin_count > 0) | |
4060 | i915_gem_object_unpin(obj); | |
4061 | ||
71acb5eb DA |
4062 | if (obj_priv->phys_obj) |
4063 | i915_gem_detach_phys_object(dev, obj); | |
4064 | ||
673a394b EA |
4065 | i915_gem_object_unbind(obj); |
4066 | ||
7e616158 CW |
4067 | if (obj_priv->mmap_offset) |
4068 | i915_gem_free_mmap_offset(obj); | |
de151cf6 | 4069 | |
9a298b2a | 4070 | kfree(obj_priv->page_cpu_valid); |
280b713b | 4071 | kfree(obj_priv->bit_17); |
9a298b2a | 4072 | kfree(obj->driver_private); |
673a394b EA |
4073 | } |
4074 | ||
673a394b EA |
4075 | /** Unbinds all objects that are on the given buffer list. */ |
4076 | static int | |
4077 | i915_gem_evict_from_list(struct drm_device *dev, struct list_head *head) | |
4078 | { | |
4079 | struct drm_gem_object *obj; | |
4080 | struct drm_i915_gem_object *obj_priv; | |
4081 | int ret; | |
4082 | ||
4083 | while (!list_empty(head)) { | |
4084 | obj_priv = list_first_entry(head, | |
4085 | struct drm_i915_gem_object, | |
4086 | list); | |
4087 | obj = obj_priv->obj; | |
4088 | ||
4089 | if (obj_priv->pin_count != 0) { | |
4090 | DRM_ERROR("Pinned object in unbind list\n"); | |
4091 | mutex_unlock(&dev->struct_mutex); | |
4092 | return -EINVAL; | |
4093 | } | |
4094 | ||
4095 | ret = i915_gem_object_unbind(obj); | |
4096 | if (ret != 0) { | |
4097 | DRM_ERROR("Error unbinding object in LeaveVT: %d\n", | |
4098 | ret); | |
4099 | mutex_unlock(&dev->struct_mutex); | |
4100 | return ret; | |
4101 | } | |
4102 | } | |
4103 | ||
4104 | ||
4105 | return 0; | |
4106 | } | |
4107 | ||
5669fcac | 4108 | int |
673a394b EA |
4109 | i915_gem_idle(struct drm_device *dev) |
4110 | { | |
4111 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4112 | uint32_t seqno, cur_seqno, last_seqno; | |
4113 | int stuck, ret; | |
4114 | ||
6dbe2772 KP |
4115 | mutex_lock(&dev->struct_mutex); |
4116 | ||
4117 | if (dev_priv->mm.suspended || dev_priv->ring.ring_obj == NULL) { | |
4118 | mutex_unlock(&dev->struct_mutex); | |
673a394b | 4119 | return 0; |
6dbe2772 | 4120 | } |
673a394b EA |
4121 | |
4122 | /* Hack! Don't let anybody do execbuf while we don't control the chip. | |
4123 | * We need to replace this with a semaphore, or something. | |
4124 | */ | |
4125 | dev_priv->mm.suspended = 1; | |
f65d9421 | 4126 | del_timer(&dev_priv->hangcheck_timer); |
673a394b | 4127 | |
6dbe2772 KP |
4128 | /* Cancel the retire work handler, wait for it to finish if running |
4129 | */ | |
4130 | mutex_unlock(&dev->struct_mutex); | |
4131 | cancel_delayed_work_sync(&dev_priv->mm.retire_work); | |
4132 | mutex_lock(&dev->struct_mutex); | |
4133 | ||
673a394b EA |
4134 | i915_kernel_lost_context(dev); |
4135 | ||
4136 | /* Flush the GPU along with all non-CPU write domains | |
4137 | */ | |
21d509e3 CW |
4138 | i915_gem_flush(dev, I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS); |
4139 | seqno = i915_add_request(dev, NULL, I915_GEM_GPU_DOMAINS); | |
673a394b EA |
4140 | |
4141 | if (seqno == 0) { | |
4142 | mutex_unlock(&dev->struct_mutex); | |
4143 | return -ENOMEM; | |
4144 | } | |
4145 | ||
4146 | dev_priv->mm.waiting_gem_seqno = seqno; | |
4147 | last_seqno = 0; | |
4148 | stuck = 0; | |
4149 | for (;;) { | |
4150 | cur_seqno = i915_get_gem_seqno(dev); | |
4151 | if (i915_seqno_passed(cur_seqno, seqno)) | |
4152 | break; | |
4153 | if (last_seqno == cur_seqno) { | |
4154 | if (stuck++ > 100) { | |
4155 | DRM_ERROR("hardware wedged\n"); | |
ba1234d1 | 4156 | atomic_set(&dev_priv->mm.wedged, 1); |
673a394b EA |
4157 | DRM_WAKEUP(&dev_priv->irq_queue); |
4158 | break; | |
4159 | } | |
4160 | } | |
4161 | msleep(10); | |
4162 | last_seqno = cur_seqno; | |
4163 | } | |
4164 | dev_priv->mm.waiting_gem_seqno = 0; | |
4165 | ||
4166 | i915_gem_retire_requests(dev); | |
4167 | ||
5e118f41 | 4168 | spin_lock(&dev_priv->mm.active_list_lock); |
ba1234d1 | 4169 | if (!atomic_read(&dev_priv->mm.wedged)) { |
28dfe52a EA |
4170 | /* Active and flushing should now be empty as we've |
4171 | * waited for a sequence higher than any pending execbuffer | |
4172 | */ | |
4173 | WARN_ON(!list_empty(&dev_priv->mm.active_list)); | |
4174 | WARN_ON(!list_empty(&dev_priv->mm.flushing_list)); | |
4175 | /* Request should now be empty as we've also waited | |
4176 | * for the last request in the list | |
4177 | */ | |
4178 | WARN_ON(!list_empty(&dev_priv->mm.request_list)); | |
4179 | } | |
673a394b | 4180 | |
28dfe52a EA |
4181 | /* Empty the active and flushing lists to inactive. If there's |
4182 | * anything left at this point, it means that we're wedged and | |
4183 | * nothing good's going to happen by leaving them there. So strip | |
4184 | * the GPU domains and just stuff them onto inactive. | |
673a394b | 4185 | */ |
28dfe52a EA |
4186 | while (!list_empty(&dev_priv->mm.active_list)) { |
4187 | struct drm_i915_gem_object *obj_priv; | |
673a394b | 4188 | |
28dfe52a EA |
4189 | obj_priv = list_first_entry(&dev_priv->mm.active_list, |
4190 | struct drm_i915_gem_object, | |
4191 | list); | |
4192 | obj_priv->obj->write_domain &= ~I915_GEM_GPU_DOMAINS; | |
4193 | i915_gem_object_move_to_inactive(obj_priv->obj); | |
4194 | } | |
5e118f41 | 4195 | spin_unlock(&dev_priv->mm.active_list_lock); |
28dfe52a EA |
4196 | |
4197 | while (!list_empty(&dev_priv->mm.flushing_list)) { | |
4198 | struct drm_i915_gem_object *obj_priv; | |
4199 | ||
151903d5 | 4200 | obj_priv = list_first_entry(&dev_priv->mm.flushing_list, |
28dfe52a EA |
4201 | struct drm_i915_gem_object, |
4202 | list); | |
4203 | obj_priv->obj->write_domain &= ~I915_GEM_GPU_DOMAINS; | |
4204 | i915_gem_object_move_to_inactive(obj_priv->obj); | |
4205 | } | |
4206 | ||
4207 | ||
4208 | /* Move all inactive buffers out of the GTT. */ | |
673a394b | 4209 | ret = i915_gem_evict_from_list(dev, &dev_priv->mm.inactive_list); |
28dfe52a | 4210 | WARN_ON(!list_empty(&dev_priv->mm.inactive_list)); |
6dbe2772 KP |
4211 | if (ret) { |
4212 | mutex_unlock(&dev->struct_mutex); | |
673a394b | 4213 | return ret; |
6dbe2772 | 4214 | } |
673a394b | 4215 | |
6dbe2772 KP |
4216 | i915_gem_cleanup_ringbuffer(dev); |
4217 | mutex_unlock(&dev->struct_mutex); | |
4218 | ||
673a394b EA |
4219 | return 0; |
4220 | } | |
4221 | ||
4222 | static int | |
4223 | i915_gem_init_hws(struct drm_device *dev) | |
4224 | { | |
4225 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4226 | struct drm_gem_object *obj; | |
4227 | struct drm_i915_gem_object *obj_priv; | |
4228 | int ret; | |
4229 | ||
4230 | /* If we need a physical address for the status page, it's already | |
4231 | * initialized at driver load time. | |
4232 | */ | |
4233 | if (!I915_NEED_GFX_HWS(dev)) | |
4234 | return 0; | |
4235 | ||
4236 | obj = drm_gem_object_alloc(dev, 4096); | |
4237 | if (obj == NULL) { | |
4238 | DRM_ERROR("Failed to allocate status page\n"); | |
4239 | return -ENOMEM; | |
4240 | } | |
4241 | obj_priv = obj->driver_private; | |
ba1eb1d8 | 4242 | obj_priv->agp_type = AGP_USER_CACHED_MEMORY; |
673a394b EA |
4243 | |
4244 | ret = i915_gem_object_pin(obj, 4096); | |
4245 | if (ret != 0) { | |
4246 | drm_gem_object_unreference(obj); | |
4247 | return ret; | |
4248 | } | |
4249 | ||
4250 | dev_priv->status_gfx_addr = obj_priv->gtt_offset; | |
673a394b | 4251 | |
856fa198 | 4252 | dev_priv->hw_status_page = kmap(obj_priv->pages[0]); |
ba1eb1d8 | 4253 | if (dev_priv->hw_status_page == NULL) { |
673a394b EA |
4254 | DRM_ERROR("Failed to map status page.\n"); |
4255 | memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); | |
3eb2ee77 | 4256 | i915_gem_object_unpin(obj); |
673a394b EA |
4257 | drm_gem_object_unreference(obj); |
4258 | return -EINVAL; | |
4259 | } | |
4260 | dev_priv->hws_obj = obj; | |
673a394b EA |
4261 | memset(dev_priv->hw_status_page, 0, PAGE_SIZE); |
4262 | I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr); | |
ba1eb1d8 | 4263 | I915_READ(HWS_PGA); /* posting read */ |
673a394b EA |
4264 | DRM_DEBUG("hws offset: 0x%08x\n", dev_priv->status_gfx_addr); |
4265 | ||
4266 | return 0; | |
4267 | } | |
4268 | ||
85a7bb98 CW |
4269 | static void |
4270 | i915_gem_cleanup_hws(struct drm_device *dev) | |
4271 | { | |
4272 | drm_i915_private_t *dev_priv = dev->dev_private; | |
bab2d1f6 CW |
4273 | struct drm_gem_object *obj; |
4274 | struct drm_i915_gem_object *obj_priv; | |
85a7bb98 CW |
4275 | |
4276 | if (dev_priv->hws_obj == NULL) | |
4277 | return; | |
4278 | ||
bab2d1f6 CW |
4279 | obj = dev_priv->hws_obj; |
4280 | obj_priv = obj->driver_private; | |
4281 | ||
856fa198 | 4282 | kunmap(obj_priv->pages[0]); |
85a7bb98 CW |
4283 | i915_gem_object_unpin(obj); |
4284 | drm_gem_object_unreference(obj); | |
4285 | dev_priv->hws_obj = NULL; | |
bab2d1f6 | 4286 | |
85a7bb98 CW |
4287 | memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); |
4288 | dev_priv->hw_status_page = NULL; | |
4289 | ||
4290 | /* Write high address into HWS_PGA when disabling. */ | |
4291 | I915_WRITE(HWS_PGA, 0x1ffff000); | |
4292 | } | |
4293 | ||
79e53945 | 4294 | int |
673a394b EA |
4295 | i915_gem_init_ringbuffer(struct drm_device *dev) |
4296 | { | |
4297 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4298 | struct drm_gem_object *obj; | |
4299 | struct drm_i915_gem_object *obj_priv; | |
79e53945 | 4300 | drm_i915_ring_buffer_t *ring = &dev_priv->ring; |
673a394b | 4301 | int ret; |
50aa253d | 4302 | u32 head; |
673a394b EA |
4303 | |
4304 | ret = i915_gem_init_hws(dev); | |
4305 | if (ret != 0) | |
4306 | return ret; | |
4307 | ||
4308 | obj = drm_gem_object_alloc(dev, 128 * 1024); | |
4309 | if (obj == NULL) { | |
4310 | DRM_ERROR("Failed to allocate ringbuffer\n"); | |
85a7bb98 | 4311 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4312 | return -ENOMEM; |
4313 | } | |
4314 | obj_priv = obj->driver_private; | |
4315 | ||
4316 | ret = i915_gem_object_pin(obj, 4096); | |
4317 | if (ret != 0) { | |
4318 | drm_gem_object_unreference(obj); | |
85a7bb98 | 4319 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4320 | return ret; |
4321 | } | |
4322 | ||
4323 | /* Set up the kernel mapping for the ring. */ | |
79e53945 | 4324 | ring->Size = obj->size; |
673a394b | 4325 | |
79e53945 JB |
4326 | ring->map.offset = dev->agp->base + obj_priv->gtt_offset; |
4327 | ring->map.size = obj->size; | |
4328 | ring->map.type = 0; | |
4329 | ring->map.flags = 0; | |
4330 | ring->map.mtrr = 0; | |
673a394b | 4331 | |
79e53945 JB |
4332 | drm_core_ioremap_wc(&ring->map, dev); |
4333 | if (ring->map.handle == NULL) { | |
673a394b EA |
4334 | DRM_ERROR("Failed to map ringbuffer.\n"); |
4335 | memset(&dev_priv->ring, 0, sizeof(dev_priv->ring)); | |
47ed185a | 4336 | i915_gem_object_unpin(obj); |
673a394b | 4337 | drm_gem_object_unreference(obj); |
85a7bb98 | 4338 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4339 | return -EINVAL; |
4340 | } | |
79e53945 JB |
4341 | ring->ring_obj = obj; |
4342 | ring->virtual_start = ring->map.handle; | |
673a394b EA |
4343 | |
4344 | /* Stop the ring if it's running. */ | |
4345 | I915_WRITE(PRB0_CTL, 0); | |
673a394b | 4346 | I915_WRITE(PRB0_TAIL, 0); |
50aa253d | 4347 | I915_WRITE(PRB0_HEAD, 0); |
673a394b EA |
4348 | |
4349 | /* Initialize the ring. */ | |
4350 | I915_WRITE(PRB0_START, obj_priv->gtt_offset); | |
50aa253d KP |
4351 | head = I915_READ(PRB0_HEAD) & HEAD_ADDR; |
4352 | ||
4353 | /* G45 ring initialization fails to reset head to zero */ | |
4354 | if (head != 0) { | |
4355 | DRM_ERROR("Ring head not reset to zero " | |
4356 | "ctl %08x head %08x tail %08x start %08x\n", | |
4357 | I915_READ(PRB0_CTL), | |
4358 | I915_READ(PRB0_HEAD), | |
4359 | I915_READ(PRB0_TAIL), | |
4360 | I915_READ(PRB0_START)); | |
4361 | I915_WRITE(PRB0_HEAD, 0); | |
4362 | ||
4363 | DRM_ERROR("Ring head forced to zero " | |
4364 | "ctl %08x head %08x tail %08x start %08x\n", | |
4365 | I915_READ(PRB0_CTL), | |
4366 | I915_READ(PRB0_HEAD), | |
4367 | I915_READ(PRB0_TAIL), | |
4368 | I915_READ(PRB0_START)); | |
4369 | } | |
4370 | ||
673a394b EA |
4371 | I915_WRITE(PRB0_CTL, |
4372 | ((obj->size - 4096) & RING_NR_PAGES) | | |
4373 | RING_NO_REPORT | | |
4374 | RING_VALID); | |
4375 | ||
50aa253d KP |
4376 | head = I915_READ(PRB0_HEAD) & HEAD_ADDR; |
4377 | ||
4378 | /* If the head is still not zero, the ring is dead */ | |
4379 | if (head != 0) { | |
4380 | DRM_ERROR("Ring initialization failed " | |
4381 | "ctl %08x head %08x tail %08x start %08x\n", | |
4382 | I915_READ(PRB0_CTL), | |
4383 | I915_READ(PRB0_HEAD), | |
4384 | I915_READ(PRB0_TAIL), | |
4385 | I915_READ(PRB0_START)); | |
4386 | return -EIO; | |
4387 | } | |
4388 | ||
673a394b | 4389 | /* Update our cache of the ring state */ |
79e53945 JB |
4390 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
4391 | i915_kernel_lost_context(dev); | |
4392 | else { | |
4393 | ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR; | |
4394 | ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR; | |
4395 | ring->space = ring->head - (ring->tail + 8); | |
4396 | if (ring->space < 0) | |
4397 | ring->space += ring->Size; | |
4398 | } | |
673a394b EA |
4399 | |
4400 | return 0; | |
4401 | } | |
4402 | ||
79e53945 | 4403 | void |
673a394b EA |
4404 | i915_gem_cleanup_ringbuffer(struct drm_device *dev) |
4405 | { | |
4406 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4407 | ||
4408 | if (dev_priv->ring.ring_obj == NULL) | |
4409 | return; | |
4410 | ||
4411 | drm_core_ioremapfree(&dev_priv->ring.map, dev); | |
4412 | ||
4413 | i915_gem_object_unpin(dev_priv->ring.ring_obj); | |
4414 | drm_gem_object_unreference(dev_priv->ring.ring_obj); | |
4415 | dev_priv->ring.ring_obj = NULL; | |
4416 | memset(&dev_priv->ring, 0, sizeof(dev_priv->ring)); | |
4417 | ||
85a7bb98 | 4418 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4419 | } |
4420 | ||
4421 | int | |
4422 | i915_gem_entervt_ioctl(struct drm_device *dev, void *data, | |
4423 | struct drm_file *file_priv) | |
4424 | { | |
4425 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4426 | int ret; | |
4427 | ||
79e53945 JB |
4428 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4429 | return 0; | |
4430 | ||
ba1234d1 | 4431 | if (atomic_read(&dev_priv->mm.wedged)) { |
673a394b | 4432 | DRM_ERROR("Reenabling wedged hardware, good luck\n"); |
ba1234d1 | 4433 | atomic_set(&dev_priv->mm.wedged, 0); |
673a394b EA |
4434 | } |
4435 | ||
673a394b | 4436 | mutex_lock(&dev->struct_mutex); |
9bb2d6f9 EA |
4437 | dev_priv->mm.suspended = 0; |
4438 | ||
4439 | ret = i915_gem_init_ringbuffer(dev); | |
d816f6ac WF |
4440 | if (ret != 0) { |
4441 | mutex_unlock(&dev->struct_mutex); | |
9bb2d6f9 | 4442 | return ret; |
d816f6ac | 4443 | } |
9bb2d6f9 | 4444 | |
5e118f41 | 4445 | spin_lock(&dev_priv->mm.active_list_lock); |
673a394b | 4446 | BUG_ON(!list_empty(&dev_priv->mm.active_list)); |
5e118f41 CW |
4447 | spin_unlock(&dev_priv->mm.active_list_lock); |
4448 | ||
673a394b EA |
4449 | BUG_ON(!list_empty(&dev_priv->mm.flushing_list)); |
4450 | BUG_ON(!list_empty(&dev_priv->mm.inactive_list)); | |
4451 | BUG_ON(!list_empty(&dev_priv->mm.request_list)); | |
673a394b | 4452 | mutex_unlock(&dev->struct_mutex); |
dbb19d30 KH |
4453 | |
4454 | drm_irq_install(dev); | |
4455 | ||
673a394b EA |
4456 | return 0; |
4457 | } | |
4458 | ||
4459 | int | |
4460 | i915_gem_leavevt_ioctl(struct drm_device *dev, void *data, | |
4461 | struct drm_file *file_priv) | |
4462 | { | |
4463 | int ret; | |
4464 | ||
79e53945 JB |
4465 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4466 | return 0; | |
4467 | ||
673a394b | 4468 | ret = i915_gem_idle(dev); |
dbb19d30 KH |
4469 | drm_irq_uninstall(dev); |
4470 | ||
6dbe2772 | 4471 | return ret; |
673a394b EA |
4472 | } |
4473 | ||
4474 | void | |
4475 | i915_gem_lastclose(struct drm_device *dev) | |
4476 | { | |
4477 | int ret; | |
673a394b | 4478 | |
e806b495 EA |
4479 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4480 | return; | |
4481 | ||
6dbe2772 KP |
4482 | ret = i915_gem_idle(dev); |
4483 | if (ret) | |
4484 | DRM_ERROR("failed to idle hardware: %d\n", ret); | |
673a394b EA |
4485 | } |
4486 | ||
4487 | void | |
4488 | i915_gem_load(struct drm_device *dev) | |
4489 | { | |
b5aa8a0f | 4490 | int i; |
673a394b EA |
4491 | drm_i915_private_t *dev_priv = dev->dev_private; |
4492 | ||
5e118f41 | 4493 | spin_lock_init(&dev_priv->mm.active_list_lock); |
673a394b EA |
4494 | INIT_LIST_HEAD(&dev_priv->mm.active_list); |
4495 | INIT_LIST_HEAD(&dev_priv->mm.flushing_list); | |
4496 | INIT_LIST_HEAD(&dev_priv->mm.inactive_list); | |
4497 | INIT_LIST_HEAD(&dev_priv->mm.request_list); | |
a09ba7fa | 4498 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
673a394b EA |
4499 | INIT_DELAYED_WORK(&dev_priv->mm.retire_work, |
4500 | i915_gem_retire_work_handler); | |
4501 | dev_priv->mm.next_gem_seqno = 1; | |
4502 | ||
31169714 CW |
4503 | spin_lock(&shrink_list_lock); |
4504 | list_add(&dev_priv->mm.shrink_list, &shrink_list); | |
4505 | spin_unlock(&shrink_list_lock); | |
4506 | ||
de151cf6 JB |
4507 | /* Old X drivers will take 0-2 for front, back, depth buffers */ |
4508 | dev_priv->fence_reg_start = 3; | |
4509 | ||
0f973f27 | 4510 | if (IS_I965G(dev) || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) |
de151cf6 JB |
4511 | dev_priv->num_fence_regs = 16; |
4512 | else | |
4513 | dev_priv->num_fence_regs = 8; | |
4514 | ||
b5aa8a0f GH |
4515 | /* Initialize fence registers to zero */ |
4516 | if (IS_I965G(dev)) { | |
4517 | for (i = 0; i < 16; i++) | |
4518 | I915_WRITE64(FENCE_REG_965_0 + (i * 8), 0); | |
4519 | } else { | |
4520 | for (i = 0; i < 8; i++) | |
4521 | I915_WRITE(FENCE_REG_830_0 + (i * 4), 0); | |
4522 | if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) | |
4523 | for (i = 0; i < 8; i++) | |
4524 | I915_WRITE(FENCE_REG_945_8 + (i * 4), 0); | |
4525 | } | |
4526 | ||
673a394b EA |
4527 | i915_gem_detect_bit_6_swizzle(dev); |
4528 | } | |
71acb5eb DA |
4529 | |
4530 | /* | |
4531 | * Create a physically contiguous memory object for this object | |
4532 | * e.g. for cursor + overlay regs | |
4533 | */ | |
4534 | int i915_gem_init_phys_object(struct drm_device *dev, | |
4535 | int id, int size) | |
4536 | { | |
4537 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4538 | struct drm_i915_gem_phys_object *phys_obj; | |
4539 | int ret; | |
4540 | ||
4541 | if (dev_priv->mm.phys_objs[id - 1] || !size) | |
4542 | return 0; | |
4543 | ||
9a298b2a | 4544 | phys_obj = kzalloc(sizeof(struct drm_i915_gem_phys_object), GFP_KERNEL); |
71acb5eb DA |
4545 | if (!phys_obj) |
4546 | return -ENOMEM; | |
4547 | ||
4548 | phys_obj->id = id; | |
4549 | ||
4550 | phys_obj->handle = drm_pci_alloc(dev, size, 0, 0xffffffff); | |
4551 | if (!phys_obj->handle) { | |
4552 | ret = -ENOMEM; | |
4553 | goto kfree_obj; | |
4554 | } | |
4555 | #ifdef CONFIG_X86 | |
4556 | set_memory_wc((unsigned long)phys_obj->handle->vaddr, phys_obj->handle->size / PAGE_SIZE); | |
4557 | #endif | |
4558 | ||
4559 | dev_priv->mm.phys_objs[id - 1] = phys_obj; | |
4560 | ||
4561 | return 0; | |
4562 | kfree_obj: | |
9a298b2a | 4563 | kfree(phys_obj); |
71acb5eb DA |
4564 | return ret; |
4565 | } | |
4566 | ||
4567 | void i915_gem_free_phys_object(struct drm_device *dev, int id) | |
4568 | { | |
4569 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4570 | struct drm_i915_gem_phys_object *phys_obj; | |
4571 | ||
4572 | if (!dev_priv->mm.phys_objs[id - 1]) | |
4573 | return; | |
4574 | ||
4575 | phys_obj = dev_priv->mm.phys_objs[id - 1]; | |
4576 | if (phys_obj->cur_obj) { | |
4577 | i915_gem_detach_phys_object(dev, phys_obj->cur_obj); | |
4578 | } | |
4579 | ||
4580 | #ifdef CONFIG_X86 | |
4581 | set_memory_wb((unsigned long)phys_obj->handle->vaddr, phys_obj->handle->size / PAGE_SIZE); | |
4582 | #endif | |
4583 | drm_pci_free(dev, phys_obj->handle); | |
4584 | kfree(phys_obj); | |
4585 | dev_priv->mm.phys_objs[id - 1] = NULL; | |
4586 | } | |
4587 | ||
4588 | void i915_gem_free_all_phys_object(struct drm_device *dev) | |
4589 | { | |
4590 | int i; | |
4591 | ||
260883c8 | 4592 | for (i = I915_GEM_PHYS_CURSOR_0; i <= I915_MAX_PHYS_OBJECT; i++) |
71acb5eb DA |
4593 | i915_gem_free_phys_object(dev, i); |
4594 | } | |
4595 | ||
4596 | void i915_gem_detach_phys_object(struct drm_device *dev, | |
4597 | struct drm_gem_object *obj) | |
4598 | { | |
4599 | struct drm_i915_gem_object *obj_priv; | |
4600 | int i; | |
4601 | int ret; | |
4602 | int page_count; | |
4603 | ||
4604 | obj_priv = obj->driver_private; | |
4605 | if (!obj_priv->phys_obj) | |
4606 | return; | |
4607 | ||
856fa198 | 4608 | ret = i915_gem_object_get_pages(obj); |
71acb5eb DA |
4609 | if (ret) |
4610 | goto out; | |
4611 | ||
4612 | page_count = obj->size / PAGE_SIZE; | |
4613 | ||
4614 | for (i = 0; i < page_count; i++) { | |
856fa198 | 4615 | char *dst = kmap_atomic(obj_priv->pages[i], KM_USER0); |
71acb5eb DA |
4616 | char *src = obj_priv->phys_obj->handle->vaddr + (i * PAGE_SIZE); |
4617 | ||
4618 | memcpy(dst, src, PAGE_SIZE); | |
4619 | kunmap_atomic(dst, KM_USER0); | |
4620 | } | |
856fa198 | 4621 | drm_clflush_pages(obj_priv->pages, page_count); |
71acb5eb | 4622 | drm_agp_chipset_flush(dev); |
d78b47b9 CW |
4623 | |
4624 | i915_gem_object_put_pages(obj); | |
71acb5eb DA |
4625 | out: |
4626 | obj_priv->phys_obj->cur_obj = NULL; | |
4627 | obj_priv->phys_obj = NULL; | |
4628 | } | |
4629 | ||
4630 | int | |
4631 | i915_gem_attach_phys_object(struct drm_device *dev, | |
4632 | struct drm_gem_object *obj, int id) | |
4633 | { | |
4634 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4635 | struct drm_i915_gem_object *obj_priv; | |
4636 | int ret = 0; | |
4637 | int page_count; | |
4638 | int i; | |
4639 | ||
4640 | if (id > I915_MAX_PHYS_OBJECT) | |
4641 | return -EINVAL; | |
4642 | ||
4643 | obj_priv = obj->driver_private; | |
4644 | ||
4645 | if (obj_priv->phys_obj) { | |
4646 | if (obj_priv->phys_obj->id == id) | |
4647 | return 0; | |
4648 | i915_gem_detach_phys_object(dev, obj); | |
4649 | } | |
4650 | ||
4651 | ||
4652 | /* create a new object */ | |
4653 | if (!dev_priv->mm.phys_objs[id - 1]) { | |
4654 | ret = i915_gem_init_phys_object(dev, id, | |
4655 | obj->size); | |
4656 | if (ret) { | |
aeb565df | 4657 | DRM_ERROR("failed to init phys object %d size: %zu\n", id, obj->size); |
71acb5eb DA |
4658 | goto out; |
4659 | } | |
4660 | } | |
4661 | ||
4662 | /* bind to the object */ | |
4663 | obj_priv->phys_obj = dev_priv->mm.phys_objs[id - 1]; | |
4664 | obj_priv->phys_obj->cur_obj = obj; | |
4665 | ||
856fa198 | 4666 | ret = i915_gem_object_get_pages(obj); |
71acb5eb DA |
4667 | if (ret) { |
4668 | DRM_ERROR("failed to get page list\n"); | |
4669 | goto out; | |
4670 | } | |
4671 | ||
4672 | page_count = obj->size / PAGE_SIZE; | |
4673 | ||
4674 | for (i = 0; i < page_count; i++) { | |
856fa198 | 4675 | char *src = kmap_atomic(obj_priv->pages[i], KM_USER0); |
71acb5eb DA |
4676 | char *dst = obj_priv->phys_obj->handle->vaddr + (i * PAGE_SIZE); |
4677 | ||
4678 | memcpy(dst, src, PAGE_SIZE); | |
4679 | kunmap_atomic(src, KM_USER0); | |
4680 | } | |
4681 | ||
d78b47b9 CW |
4682 | i915_gem_object_put_pages(obj); |
4683 | ||
71acb5eb DA |
4684 | return 0; |
4685 | out: | |
4686 | return ret; | |
4687 | } | |
4688 | ||
4689 | static int | |
4690 | i915_gem_phys_pwrite(struct drm_device *dev, struct drm_gem_object *obj, | |
4691 | struct drm_i915_gem_pwrite *args, | |
4692 | struct drm_file *file_priv) | |
4693 | { | |
4694 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
4695 | void *obj_addr; | |
4696 | int ret; | |
4697 | char __user *user_data; | |
4698 | ||
4699 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
4700 | obj_addr = obj_priv->phys_obj->handle->vaddr + args->offset; | |
4701 | ||
e08fb4f6 | 4702 | DRM_DEBUG("obj_addr %p, %lld\n", obj_addr, args->size); |
71acb5eb DA |
4703 | ret = copy_from_user(obj_addr, user_data, args->size); |
4704 | if (ret) | |
4705 | return -EFAULT; | |
4706 | ||
4707 | drm_agp_chipset_flush(dev); | |
4708 | return 0; | |
4709 | } | |
b962442e EA |
4710 | |
4711 | void i915_gem_release(struct drm_device * dev, struct drm_file *file_priv) | |
4712 | { | |
4713 | struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv; | |
4714 | ||
4715 | /* Clean up our request list when the client is going away, so that | |
4716 | * later retire_requests won't dereference our soon-to-be-gone | |
4717 | * file_priv. | |
4718 | */ | |
4719 | mutex_lock(&dev->struct_mutex); | |
4720 | while (!list_empty(&i915_file_priv->mm.request_list)) | |
4721 | list_del_init(i915_file_priv->mm.request_list.next); | |
4722 | mutex_unlock(&dev->struct_mutex); | |
4723 | } | |
31169714 CW |
4724 | |
4725 | /* Immediately discard the backing storage */ | |
4726 | static void | |
4727 | i915_gem_object_truncate(struct drm_gem_object *obj) | |
4728 | { | |
4729 | struct inode *inode; | |
4730 | ||
4731 | inode = obj->filp->f_path.dentry->d_inode; | |
4732 | ||
4733 | mutex_lock(&inode->i_mutex); | |
4734 | truncate_inode_pages(inode->i_mapping, 0); | |
4735 | mutex_unlock(&inode->i_mutex); | |
4736 | } | |
4737 | ||
31169714 CW |
4738 | static int |
4739 | i915_gem_shrink(int nr_to_scan, gfp_t gfp_mask) | |
4740 | { | |
4741 | drm_i915_private_t *dev_priv, *next_dev; | |
4742 | struct drm_i915_gem_object *obj_priv, *next_obj; | |
4743 | int cnt = 0; | |
4744 | int would_deadlock = 1; | |
4745 | ||
4746 | /* "fast-path" to count number of available objects */ | |
4747 | if (nr_to_scan == 0) { | |
4748 | spin_lock(&shrink_list_lock); | |
4749 | list_for_each_entry(dev_priv, &shrink_list, mm.shrink_list) { | |
4750 | struct drm_device *dev = dev_priv->dev; | |
4751 | ||
4752 | if (mutex_trylock(&dev->struct_mutex)) { | |
4753 | list_for_each_entry(obj_priv, | |
4754 | &dev_priv->mm.inactive_list, | |
4755 | list) | |
4756 | cnt++; | |
4757 | mutex_unlock(&dev->struct_mutex); | |
4758 | } | |
4759 | } | |
4760 | spin_unlock(&shrink_list_lock); | |
4761 | ||
4762 | return (cnt / 100) * sysctl_vfs_cache_pressure; | |
4763 | } | |
4764 | ||
4765 | spin_lock(&shrink_list_lock); | |
4766 | ||
4767 | /* first scan for clean buffers */ | |
4768 | list_for_each_entry_safe(dev_priv, next_dev, | |
4769 | &shrink_list, mm.shrink_list) { | |
4770 | struct drm_device *dev = dev_priv->dev; | |
4771 | ||
4772 | if (! mutex_trylock(&dev->struct_mutex)) | |
4773 | continue; | |
4774 | ||
4775 | spin_unlock(&shrink_list_lock); | |
4776 | ||
4777 | i915_gem_retire_requests(dev); | |
4778 | ||
4779 | list_for_each_entry_safe(obj_priv, next_obj, | |
4780 | &dev_priv->mm.inactive_list, | |
4781 | list) { | |
4782 | if (i915_gem_object_is_purgeable(obj_priv)) { | |
4783 | struct drm_gem_object *obj = obj_priv->obj; | |
4784 | i915_gem_object_unbind(obj); | |
4785 | i915_gem_object_truncate(obj); | |
4786 | ||
4787 | if (--nr_to_scan <= 0) | |
4788 | break; | |
4789 | } | |
4790 | } | |
4791 | ||
4792 | spin_lock(&shrink_list_lock); | |
4793 | mutex_unlock(&dev->struct_mutex); | |
4794 | ||
4795 | if (nr_to_scan <= 0) | |
4796 | break; | |
4797 | } | |
4798 | ||
4799 | /* second pass, evict/count anything still on the inactive list */ | |
4800 | list_for_each_entry_safe(dev_priv, next_dev, | |
4801 | &shrink_list, mm.shrink_list) { | |
4802 | struct drm_device *dev = dev_priv->dev; | |
4803 | ||
4804 | if (! mutex_trylock(&dev->struct_mutex)) | |
4805 | continue; | |
4806 | ||
4807 | spin_unlock(&shrink_list_lock); | |
4808 | ||
4809 | list_for_each_entry_safe(obj_priv, next_obj, | |
4810 | &dev_priv->mm.inactive_list, | |
4811 | list) { | |
4812 | if (nr_to_scan > 0) { | |
4813 | struct drm_gem_object *obj = obj_priv->obj; | |
4814 | i915_gem_object_unbind(obj); | |
4815 | if (i915_gem_object_is_purgeable(obj_priv)) | |
4816 | i915_gem_object_truncate(obj); | |
4817 | ||
4818 | nr_to_scan--; | |
4819 | } else | |
4820 | cnt++; | |
4821 | } | |
4822 | ||
4823 | spin_lock(&shrink_list_lock); | |
4824 | mutex_unlock(&dev->struct_mutex); | |
4825 | ||
4826 | would_deadlock = 0; | |
4827 | } | |
4828 | ||
4829 | spin_unlock(&shrink_list_lock); | |
4830 | ||
4831 | if (would_deadlock) | |
4832 | return -1; | |
4833 | else if (cnt > 0) | |
4834 | return (cnt / 100) * sysctl_vfs_cache_pressure; | |
4835 | else | |
4836 | return 0; | |
4837 | } | |
4838 | ||
4839 | static struct shrinker shrinker = { | |
4840 | .shrink = i915_gem_shrink, | |
4841 | .seeks = DEFAULT_SEEKS, | |
4842 | }; | |
4843 | ||
4844 | __init void | |
4845 | i915_gem_shrinker_init(void) | |
4846 | { | |
4847 | register_shrinker(&shrinker); | |
4848 | } | |
4849 | ||
4850 | __exit void | |
4851 | i915_gem_shrinker_exit(void) | |
4852 | { | |
4853 | unregister_shrinker(&shrinker); | |
4854 | } |