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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" | |
32 | #include <linux/swap.h> | |
79e53945 | 33 | #include <linux/pci.h> |
673a394b | 34 | |
28dfe52a EA |
35 | #define I915_GEM_GPU_DOMAINS (~(I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT)) |
36 | ||
e47c68e9 EA |
37 | static void i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj); |
38 | static void i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj); | |
39 | static void i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj); | |
e47c68e9 EA |
40 | static int i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, |
41 | int write); | |
42 | static int i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj, | |
43 | uint64_t offset, | |
44 | uint64_t size); | |
45 | static void i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object *obj); | |
673a394b | 46 | static int i915_gem_object_wait_rendering(struct drm_gem_object *obj); |
de151cf6 JB |
47 | static int i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, |
48 | unsigned alignment); | |
de151cf6 JB |
49 | static void i915_gem_clear_fence_reg(struct drm_gem_object *obj); |
50 | static int i915_gem_evict_something(struct drm_device *dev); | |
71acb5eb DA |
51 | static int i915_gem_phys_pwrite(struct drm_device *dev, struct drm_gem_object *obj, |
52 | struct drm_i915_gem_pwrite *args, | |
53 | struct drm_file *file_priv); | |
673a394b | 54 | |
79e53945 JB |
55 | int i915_gem_do_init(struct drm_device *dev, unsigned long start, |
56 | unsigned long end) | |
673a394b EA |
57 | { |
58 | drm_i915_private_t *dev_priv = dev->dev_private; | |
673a394b | 59 | |
79e53945 JB |
60 | if (start >= end || |
61 | (start & (PAGE_SIZE - 1)) != 0 || | |
62 | (end & (PAGE_SIZE - 1)) != 0) { | |
673a394b EA |
63 | return -EINVAL; |
64 | } | |
65 | ||
79e53945 JB |
66 | drm_mm_init(&dev_priv->mm.gtt_space, start, |
67 | end - start); | |
673a394b | 68 | |
79e53945 JB |
69 | dev->gtt_total = (uint32_t) (end - start); |
70 | ||
71 | return 0; | |
72 | } | |
673a394b | 73 | |
79e53945 JB |
74 | int |
75 | i915_gem_init_ioctl(struct drm_device *dev, void *data, | |
76 | struct drm_file *file_priv) | |
77 | { | |
78 | struct drm_i915_gem_init *args = data; | |
79 | int ret; | |
80 | ||
81 | mutex_lock(&dev->struct_mutex); | |
82 | ret = i915_gem_do_init(dev, args->gtt_start, args->gtt_end); | |
673a394b EA |
83 | mutex_unlock(&dev->struct_mutex); |
84 | ||
79e53945 | 85 | return ret; |
673a394b EA |
86 | } |
87 | ||
5a125c3c EA |
88 | int |
89 | i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, | |
90 | struct drm_file *file_priv) | |
91 | { | |
5a125c3c | 92 | struct drm_i915_gem_get_aperture *args = data; |
5a125c3c EA |
93 | |
94 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
95 | return -ENODEV; | |
96 | ||
97 | args->aper_size = dev->gtt_total; | |
2678d9d6 KP |
98 | args->aper_available_size = (args->aper_size - |
99 | atomic_read(&dev->pin_memory)); | |
5a125c3c EA |
100 | |
101 | return 0; | |
102 | } | |
103 | ||
673a394b EA |
104 | |
105 | /** | |
106 | * Creates a new mm object and returns a handle to it. | |
107 | */ | |
108 | int | |
109 | i915_gem_create_ioctl(struct drm_device *dev, void *data, | |
110 | struct drm_file *file_priv) | |
111 | { | |
112 | struct drm_i915_gem_create *args = data; | |
113 | struct drm_gem_object *obj; | |
a1a2d1d3 PP |
114 | int ret; |
115 | u32 handle; | |
673a394b EA |
116 | |
117 | args->size = roundup(args->size, PAGE_SIZE); | |
118 | ||
119 | /* Allocate the new object */ | |
120 | obj = drm_gem_object_alloc(dev, args->size); | |
121 | if (obj == NULL) | |
122 | return -ENOMEM; | |
123 | ||
124 | ret = drm_gem_handle_create(file_priv, obj, &handle); | |
125 | mutex_lock(&dev->struct_mutex); | |
126 | drm_gem_object_handle_unreference(obj); | |
127 | mutex_unlock(&dev->struct_mutex); | |
128 | ||
129 | if (ret) | |
130 | return ret; | |
131 | ||
132 | args->handle = handle; | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
eb01459f EA |
137 | static inline int |
138 | fast_shmem_read(struct page **pages, | |
139 | loff_t page_base, int page_offset, | |
140 | char __user *data, | |
141 | int length) | |
142 | { | |
143 | char __iomem *vaddr; | |
2bc43b5c | 144 | int unwritten; |
eb01459f EA |
145 | |
146 | vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0); | |
147 | if (vaddr == NULL) | |
148 | return -ENOMEM; | |
2bc43b5c | 149 | unwritten = __copy_to_user_inatomic(data, vaddr + page_offset, length); |
eb01459f EA |
150 | kunmap_atomic(vaddr, KM_USER0); |
151 | ||
2bc43b5c FM |
152 | if (unwritten) |
153 | return -EFAULT; | |
154 | ||
155 | return 0; | |
eb01459f EA |
156 | } |
157 | ||
280b713b EA |
158 | static int i915_gem_object_needs_bit17_swizzle(struct drm_gem_object *obj) |
159 | { | |
160 | drm_i915_private_t *dev_priv = obj->dev->dev_private; | |
161 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
162 | ||
163 | return dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 && | |
164 | obj_priv->tiling_mode != I915_TILING_NONE; | |
165 | } | |
166 | ||
40123c1f EA |
167 | static inline int |
168 | slow_shmem_copy(struct page *dst_page, | |
169 | int dst_offset, | |
170 | struct page *src_page, | |
171 | int src_offset, | |
172 | int length) | |
173 | { | |
174 | char *dst_vaddr, *src_vaddr; | |
175 | ||
176 | dst_vaddr = kmap_atomic(dst_page, KM_USER0); | |
177 | if (dst_vaddr == NULL) | |
178 | return -ENOMEM; | |
179 | ||
180 | src_vaddr = kmap_atomic(src_page, KM_USER1); | |
181 | if (src_vaddr == NULL) { | |
182 | kunmap_atomic(dst_vaddr, KM_USER0); | |
183 | return -ENOMEM; | |
184 | } | |
185 | ||
186 | memcpy(dst_vaddr + dst_offset, src_vaddr + src_offset, length); | |
187 | ||
188 | kunmap_atomic(src_vaddr, KM_USER1); | |
189 | kunmap_atomic(dst_vaddr, KM_USER0); | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
280b713b EA |
194 | static inline int |
195 | slow_shmem_bit17_copy(struct page *gpu_page, | |
196 | int gpu_offset, | |
197 | struct page *cpu_page, | |
198 | int cpu_offset, | |
199 | int length, | |
200 | int is_read) | |
201 | { | |
202 | char *gpu_vaddr, *cpu_vaddr; | |
203 | ||
204 | /* Use the unswizzled path if this page isn't affected. */ | |
205 | if ((page_to_phys(gpu_page) & (1 << 17)) == 0) { | |
206 | if (is_read) | |
207 | return slow_shmem_copy(cpu_page, cpu_offset, | |
208 | gpu_page, gpu_offset, length); | |
209 | else | |
210 | return slow_shmem_copy(gpu_page, gpu_offset, | |
211 | cpu_page, cpu_offset, length); | |
212 | } | |
213 | ||
214 | gpu_vaddr = kmap_atomic(gpu_page, KM_USER0); | |
215 | if (gpu_vaddr == NULL) | |
216 | return -ENOMEM; | |
217 | ||
218 | cpu_vaddr = kmap_atomic(cpu_page, KM_USER1); | |
219 | if (cpu_vaddr == NULL) { | |
220 | kunmap_atomic(gpu_vaddr, KM_USER0); | |
221 | return -ENOMEM; | |
222 | } | |
223 | ||
224 | /* Copy the data, XORing A6 with A17 (1). The user already knows he's | |
225 | * XORing with the other bits (A9 for Y, A9 and A10 for X) | |
226 | */ | |
227 | while (length > 0) { | |
228 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
229 | int this_length = min(cacheline_end - gpu_offset, length); | |
230 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
231 | ||
232 | if (is_read) { | |
233 | memcpy(cpu_vaddr + cpu_offset, | |
234 | gpu_vaddr + swizzled_gpu_offset, | |
235 | this_length); | |
236 | } else { | |
237 | memcpy(gpu_vaddr + swizzled_gpu_offset, | |
238 | cpu_vaddr + cpu_offset, | |
239 | this_length); | |
240 | } | |
241 | cpu_offset += this_length; | |
242 | gpu_offset += this_length; | |
243 | length -= this_length; | |
244 | } | |
245 | ||
246 | kunmap_atomic(cpu_vaddr, KM_USER1); | |
247 | kunmap_atomic(gpu_vaddr, KM_USER0); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
eb01459f EA |
252 | /** |
253 | * This is the fast shmem pread path, which attempts to copy_from_user directly | |
254 | * from the backing pages of the object to the user's address space. On a | |
255 | * fault, it fails so we can fall back to i915_gem_shmem_pwrite_slow(). | |
256 | */ | |
257 | static int | |
258 | i915_gem_shmem_pread_fast(struct drm_device *dev, struct drm_gem_object *obj, | |
259 | struct drm_i915_gem_pread *args, | |
260 | struct drm_file *file_priv) | |
261 | { | |
262 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
263 | ssize_t remain; | |
264 | loff_t offset, page_base; | |
265 | char __user *user_data; | |
266 | int page_offset, page_length; | |
267 | int ret; | |
268 | ||
269 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
270 | remain = args->size; | |
271 | ||
272 | mutex_lock(&dev->struct_mutex); | |
273 | ||
274 | ret = i915_gem_object_get_pages(obj); | |
275 | if (ret != 0) | |
276 | goto fail_unlock; | |
277 | ||
278 | ret = i915_gem_object_set_cpu_read_domain_range(obj, args->offset, | |
279 | args->size); | |
280 | if (ret != 0) | |
281 | goto fail_put_pages; | |
282 | ||
283 | obj_priv = obj->driver_private; | |
284 | offset = args->offset; | |
285 | ||
286 | while (remain > 0) { | |
287 | /* Operation in this page | |
288 | * | |
289 | * page_base = page offset within aperture | |
290 | * page_offset = offset within page | |
291 | * page_length = bytes to copy for this page | |
292 | */ | |
293 | page_base = (offset & ~(PAGE_SIZE-1)); | |
294 | page_offset = offset & (PAGE_SIZE-1); | |
295 | page_length = remain; | |
296 | if ((page_offset + remain) > PAGE_SIZE) | |
297 | page_length = PAGE_SIZE - page_offset; | |
298 | ||
299 | ret = fast_shmem_read(obj_priv->pages, | |
300 | page_base, page_offset, | |
301 | user_data, page_length); | |
302 | if (ret) | |
303 | goto fail_put_pages; | |
304 | ||
305 | remain -= page_length; | |
306 | user_data += page_length; | |
307 | offset += page_length; | |
308 | } | |
309 | ||
310 | fail_put_pages: | |
311 | i915_gem_object_put_pages(obj); | |
312 | fail_unlock: | |
313 | mutex_unlock(&dev->struct_mutex); | |
314 | ||
315 | return ret; | |
316 | } | |
317 | ||
318 | /** | |
319 | * This is the fallback shmem pread path, which allocates temporary storage | |
320 | * in kernel space to copy_to_user into outside of the struct_mutex, so we | |
321 | * can copy out of the object's backing pages while holding the struct mutex | |
322 | * and not take page faults. | |
323 | */ | |
324 | static int | |
325 | i915_gem_shmem_pread_slow(struct drm_device *dev, struct drm_gem_object *obj, | |
326 | struct drm_i915_gem_pread *args, | |
327 | struct drm_file *file_priv) | |
328 | { | |
329 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
330 | struct mm_struct *mm = current->mm; | |
331 | struct page **user_pages; | |
332 | ssize_t remain; | |
333 | loff_t offset, pinned_pages, i; | |
334 | loff_t first_data_page, last_data_page, num_pages; | |
335 | int shmem_page_index, shmem_page_offset; | |
336 | int data_page_index, data_page_offset; | |
337 | int page_length; | |
338 | int ret; | |
339 | uint64_t data_ptr = args->data_ptr; | |
280b713b | 340 | int do_bit17_swizzling; |
eb01459f EA |
341 | |
342 | remain = args->size; | |
343 | ||
344 | /* Pin the user pages containing the data. We can't fault while | |
345 | * holding the struct mutex, yet we want to hold it while | |
346 | * dereferencing the user data. | |
347 | */ | |
348 | first_data_page = data_ptr / PAGE_SIZE; | |
349 | last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; | |
350 | num_pages = last_data_page - first_data_page + 1; | |
351 | ||
8e7d2b2c | 352 | user_pages = drm_calloc_large(num_pages, sizeof(struct page *)); |
eb01459f EA |
353 | if (user_pages == NULL) |
354 | return -ENOMEM; | |
355 | ||
356 | down_read(&mm->mmap_sem); | |
357 | pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, | |
e5e9ecde | 358 | num_pages, 1, 0, user_pages, NULL); |
eb01459f EA |
359 | up_read(&mm->mmap_sem); |
360 | if (pinned_pages < num_pages) { | |
361 | ret = -EFAULT; | |
362 | goto fail_put_user_pages; | |
363 | } | |
364 | ||
280b713b EA |
365 | do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
366 | ||
eb01459f EA |
367 | mutex_lock(&dev->struct_mutex); |
368 | ||
369 | ret = i915_gem_object_get_pages(obj); | |
370 | if (ret != 0) | |
371 | goto fail_unlock; | |
372 | ||
373 | ret = i915_gem_object_set_cpu_read_domain_range(obj, args->offset, | |
374 | args->size); | |
375 | if (ret != 0) | |
376 | goto fail_put_pages; | |
377 | ||
378 | obj_priv = obj->driver_private; | |
379 | offset = args->offset; | |
380 | ||
381 | while (remain > 0) { | |
382 | /* Operation in this page | |
383 | * | |
384 | * shmem_page_index = page number within shmem file | |
385 | * shmem_page_offset = offset within page in shmem file | |
386 | * data_page_index = page number in get_user_pages return | |
387 | * data_page_offset = offset with data_page_index page. | |
388 | * page_length = bytes to copy for this page | |
389 | */ | |
390 | shmem_page_index = offset / PAGE_SIZE; | |
391 | shmem_page_offset = offset & ~PAGE_MASK; | |
392 | data_page_index = data_ptr / PAGE_SIZE - first_data_page; | |
393 | data_page_offset = data_ptr & ~PAGE_MASK; | |
394 | ||
395 | page_length = remain; | |
396 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
397 | page_length = PAGE_SIZE - shmem_page_offset; | |
398 | if ((data_page_offset + page_length) > PAGE_SIZE) | |
399 | page_length = PAGE_SIZE - data_page_offset; | |
400 | ||
280b713b EA |
401 | if (do_bit17_swizzling) { |
402 | ret = slow_shmem_bit17_copy(obj_priv->pages[shmem_page_index], | |
403 | shmem_page_offset, | |
404 | user_pages[data_page_index], | |
405 | data_page_offset, | |
406 | page_length, | |
407 | 1); | |
408 | } else { | |
409 | ret = slow_shmem_copy(user_pages[data_page_index], | |
410 | data_page_offset, | |
411 | obj_priv->pages[shmem_page_index], | |
412 | shmem_page_offset, | |
413 | page_length); | |
414 | } | |
eb01459f EA |
415 | if (ret) |
416 | goto fail_put_pages; | |
417 | ||
418 | remain -= page_length; | |
419 | data_ptr += page_length; | |
420 | offset += page_length; | |
421 | } | |
422 | ||
423 | fail_put_pages: | |
424 | i915_gem_object_put_pages(obj); | |
425 | fail_unlock: | |
426 | mutex_unlock(&dev->struct_mutex); | |
427 | fail_put_user_pages: | |
428 | for (i = 0; i < pinned_pages; i++) { | |
429 | SetPageDirty(user_pages[i]); | |
430 | page_cache_release(user_pages[i]); | |
431 | } | |
8e7d2b2c | 432 | drm_free_large(user_pages); |
eb01459f EA |
433 | |
434 | return ret; | |
435 | } | |
436 | ||
673a394b EA |
437 | /** |
438 | * Reads data from the object referenced by handle. | |
439 | * | |
440 | * On error, the contents of *data are undefined. | |
441 | */ | |
442 | int | |
443 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, | |
444 | struct drm_file *file_priv) | |
445 | { | |
446 | struct drm_i915_gem_pread *args = data; | |
447 | struct drm_gem_object *obj; | |
448 | struct drm_i915_gem_object *obj_priv; | |
673a394b EA |
449 | int ret; |
450 | ||
451 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
452 | if (obj == NULL) | |
453 | return -EBADF; | |
454 | obj_priv = obj->driver_private; | |
455 | ||
456 | /* Bounds check source. | |
457 | * | |
458 | * XXX: This could use review for overflow issues... | |
459 | */ | |
460 | if (args->offset > obj->size || args->size > obj->size || | |
461 | args->offset + args->size > obj->size) { | |
462 | drm_gem_object_unreference(obj); | |
463 | return -EINVAL; | |
464 | } | |
465 | ||
280b713b | 466 | if (i915_gem_object_needs_bit17_swizzle(obj)) { |
eb01459f | 467 | ret = i915_gem_shmem_pread_slow(dev, obj, args, file_priv); |
280b713b EA |
468 | } else { |
469 | ret = i915_gem_shmem_pread_fast(dev, obj, args, file_priv); | |
470 | if (ret != 0) | |
471 | ret = i915_gem_shmem_pread_slow(dev, obj, args, | |
472 | file_priv); | |
473 | } | |
673a394b EA |
474 | |
475 | drm_gem_object_unreference(obj); | |
673a394b | 476 | |
eb01459f | 477 | return ret; |
673a394b EA |
478 | } |
479 | ||
0839ccb8 KP |
480 | /* This is the fast write path which cannot handle |
481 | * page faults in the source data | |
9b7530cc | 482 | */ |
0839ccb8 KP |
483 | |
484 | static inline int | |
485 | fast_user_write(struct io_mapping *mapping, | |
486 | loff_t page_base, int page_offset, | |
487 | char __user *user_data, | |
488 | int length) | |
9b7530cc | 489 | { |
9b7530cc | 490 | char *vaddr_atomic; |
0839ccb8 | 491 | unsigned long unwritten; |
9b7530cc | 492 | |
0839ccb8 KP |
493 | vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base); |
494 | unwritten = __copy_from_user_inatomic_nocache(vaddr_atomic + page_offset, | |
495 | user_data, length); | |
496 | io_mapping_unmap_atomic(vaddr_atomic); | |
497 | if (unwritten) | |
498 | return -EFAULT; | |
499 | return 0; | |
500 | } | |
501 | ||
502 | /* Here's the write path which can sleep for | |
503 | * page faults | |
504 | */ | |
505 | ||
506 | static inline int | |
3de09aa3 EA |
507 | slow_kernel_write(struct io_mapping *mapping, |
508 | loff_t gtt_base, int gtt_offset, | |
509 | struct page *user_page, int user_offset, | |
510 | int length) | |
0839ccb8 | 511 | { |
3de09aa3 | 512 | char *src_vaddr, *dst_vaddr; |
0839ccb8 KP |
513 | unsigned long unwritten; |
514 | ||
3de09aa3 EA |
515 | dst_vaddr = io_mapping_map_atomic_wc(mapping, gtt_base); |
516 | src_vaddr = kmap_atomic(user_page, KM_USER1); | |
517 | unwritten = __copy_from_user_inatomic_nocache(dst_vaddr + gtt_offset, | |
518 | src_vaddr + user_offset, | |
519 | length); | |
520 | kunmap_atomic(src_vaddr, KM_USER1); | |
521 | io_mapping_unmap_atomic(dst_vaddr); | |
0839ccb8 KP |
522 | if (unwritten) |
523 | return -EFAULT; | |
9b7530cc | 524 | return 0; |
9b7530cc LT |
525 | } |
526 | ||
40123c1f EA |
527 | static inline int |
528 | fast_shmem_write(struct page **pages, | |
529 | loff_t page_base, int page_offset, | |
530 | char __user *data, | |
531 | int length) | |
532 | { | |
533 | char __iomem *vaddr; | |
d0088775 | 534 | unsigned long unwritten; |
40123c1f EA |
535 | |
536 | vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0); | |
537 | if (vaddr == NULL) | |
538 | return -ENOMEM; | |
d0088775 | 539 | unwritten = __copy_from_user_inatomic(vaddr + page_offset, data, length); |
40123c1f EA |
540 | kunmap_atomic(vaddr, KM_USER0); |
541 | ||
d0088775 DA |
542 | if (unwritten) |
543 | return -EFAULT; | |
40123c1f EA |
544 | return 0; |
545 | } | |
546 | ||
3de09aa3 EA |
547 | /** |
548 | * This is the fast pwrite path, where we copy the data directly from the | |
549 | * user into the GTT, uncached. | |
550 | */ | |
673a394b | 551 | static int |
3de09aa3 EA |
552 | i915_gem_gtt_pwrite_fast(struct drm_device *dev, struct drm_gem_object *obj, |
553 | struct drm_i915_gem_pwrite *args, | |
554 | struct drm_file *file_priv) | |
673a394b EA |
555 | { |
556 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
0839ccb8 | 557 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b | 558 | ssize_t remain; |
0839ccb8 | 559 | loff_t offset, page_base; |
673a394b | 560 | char __user *user_data; |
0839ccb8 KP |
561 | int page_offset, page_length; |
562 | int ret; | |
673a394b EA |
563 | |
564 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
565 | remain = args->size; | |
566 | if (!access_ok(VERIFY_READ, user_data, remain)) | |
567 | return -EFAULT; | |
568 | ||
569 | ||
570 | mutex_lock(&dev->struct_mutex); | |
571 | ret = i915_gem_object_pin(obj, 0); | |
572 | if (ret) { | |
573 | mutex_unlock(&dev->struct_mutex); | |
574 | return ret; | |
575 | } | |
2ef7eeaa | 576 | ret = i915_gem_object_set_to_gtt_domain(obj, 1); |
673a394b EA |
577 | if (ret) |
578 | goto fail; | |
579 | ||
580 | obj_priv = obj->driver_private; | |
581 | offset = obj_priv->gtt_offset + args->offset; | |
673a394b EA |
582 | |
583 | while (remain > 0) { | |
584 | /* Operation in this page | |
585 | * | |
0839ccb8 KP |
586 | * page_base = page offset within aperture |
587 | * page_offset = offset within page | |
588 | * page_length = bytes to copy for this page | |
673a394b | 589 | */ |
0839ccb8 KP |
590 | page_base = (offset & ~(PAGE_SIZE-1)); |
591 | page_offset = offset & (PAGE_SIZE-1); | |
592 | page_length = remain; | |
593 | if ((page_offset + remain) > PAGE_SIZE) | |
594 | page_length = PAGE_SIZE - page_offset; | |
595 | ||
596 | ret = fast_user_write (dev_priv->mm.gtt_mapping, page_base, | |
597 | page_offset, user_data, page_length); | |
598 | ||
599 | /* If we get a fault while copying data, then (presumably) our | |
3de09aa3 EA |
600 | * source page isn't available. Return the error and we'll |
601 | * retry in the slow path. | |
0839ccb8 | 602 | */ |
3de09aa3 EA |
603 | if (ret) |
604 | goto fail; | |
673a394b | 605 | |
0839ccb8 KP |
606 | remain -= page_length; |
607 | user_data += page_length; | |
608 | offset += page_length; | |
673a394b | 609 | } |
673a394b EA |
610 | |
611 | fail: | |
612 | i915_gem_object_unpin(obj); | |
613 | mutex_unlock(&dev->struct_mutex); | |
614 | ||
615 | return ret; | |
616 | } | |
617 | ||
3de09aa3 EA |
618 | /** |
619 | * This is the fallback GTT pwrite path, which uses get_user_pages to pin | |
620 | * the memory and maps it using kmap_atomic for copying. | |
621 | * | |
622 | * This code resulted in x11perf -rgb10text consuming about 10% more CPU | |
623 | * than using i915_gem_gtt_pwrite_fast on a G45 (32-bit). | |
624 | */ | |
3043c60c | 625 | static int |
3de09aa3 EA |
626 | i915_gem_gtt_pwrite_slow(struct drm_device *dev, struct drm_gem_object *obj, |
627 | struct drm_i915_gem_pwrite *args, | |
628 | struct drm_file *file_priv) | |
673a394b | 629 | { |
3de09aa3 EA |
630 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
631 | drm_i915_private_t *dev_priv = dev->dev_private; | |
632 | ssize_t remain; | |
633 | loff_t gtt_page_base, offset; | |
634 | loff_t first_data_page, last_data_page, num_pages; | |
635 | loff_t pinned_pages, i; | |
636 | struct page **user_pages; | |
637 | struct mm_struct *mm = current->mm; | |
638 | int gtt_page_offset, data_page_offset, data_page_index, page_length; | |
673a394b | 639 | int ret; |
3de09aa3 EA |
640 | uint64_t data_ptr = args->data_ptr; |
641 | ||
642 | remain = args->size; | |
643 | ||
644 | /* Pin the user pages containing the data. We can't fault while | |
645 | * holding the struct mutex, and all of the pwrite implementations | |
646 | * want to hold it while dereferencing the user data. | |
647 | */ | |
648 | first_data_page = data_ptr / PAGE_SIZE; | |
649 | last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; | |
650 | num_pages = last_data_page - first_data_page + 1; | |
651 | ||
8e7d2b2c | 652 | user_pages = drm_calloc_large(num_pages, sizeof(struct page *)); |
3de09aa3 EA |
653 | if (user_pages == NULL) |
654 | return -ENOMEM; | |
655 | ||
656 | down_read(&mm->mmap_sem); | |
657 | pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, | |
658 | num_pages, 0, 0, user_pages, NULL); | |
659 | up_read(&mm->mmap_sem); | |
660 | if (pinned_pages < num_pages) { | |
661 | ret = -EFAULT; | |
662 | goto out_unpin_pages; | |
663 | } | |
673a394b EA |
664 | |
665 | mutex_lock(&dev->struct_mutex); | |
3de09aa3 EA |
666 | ret = i915_gem_object_pin(obj, 0); |
667 | if (ret) | |
668 | goto out_unlock; | |
669 | ||
670 | ret = i915_gem_object_set_to_gtt_domain(obj, 1); | |
671 | if (ret) | |
672 | goto out_unpin_object; | |
673 | ||
674 | obj_priv = obj->driver_private; | |
675 | offset = obj_priv->gtt_offset + args->offset; | |
676 | ||
677 | while (remain > 0) { | |
678 | /* Operation in this page | |
679 | * | |
680 | * gtt_page_base = page offset within aperture | |
681 | * gtt_page_offset = offset within page in aperture | |
682 | * data_page_index = page number in get_user_pages return | |
683 | * data_page_offset = offset with data_page_index page. | |
684 | * page_length = bytes to copy for this page | |
685 | */ | |
686 | gtt_page_base = offset & PAGE_MASK; | |
687 | gtt_page_offset = offset & ~PAGE_MASK; | |
688 | data_page_index = data_ptr / PAGE_SIZE - first_data_page; | |
689 | data_page_offset = data_ptr & ~PAGE_MASK; | |
690 | ||
691 | page_length = remain; | |
692 | if ((gtt_page_offset + page_length) > PAGE_SIZE) | |
693 | page_length = PAGE_SIZE - gtt_page_offset; | |
694 | if ((data_page_offset + page_length) > PAGE_SIZE) | |
695 | page_length = PAGE_SIZE - data_page_offset; | |
696 | ||
697 | ret = slow_kernel_write(dev_priv->mm.gtt_mapping, | |
698 | gtt_page_base, gtt_page_offset, | |
699 | user_pages[data_page_index], | |
700 | data_page_offset, | |
701 | page_length); | |
702 | ||
703 | /* If we get a fault while copying data, then (presumably) our | |
704 | * source page isn't available. Return the error and we'll | |
705 | * retry in the slow path. | |
706 | */ | |
707 | if (ret) | |
708 | goto out_unpin_object; | |
709 | ||
710 | remain -= page_length; | |
711 | offset += page_length; | |
712 | data_ptr += page_length; | |
713 | } | |
714 | ||
715 | out_unpin_object: | |
716 | i915_gem_object_unpin(obj); | |
717 | out_unlock: | |
718 | mutex_unlock(&dev->struct_mutex); | |
719 | out_unpin_pages: | |
720 | for (i = 0; i < pinned_pages; i++) | |
721 | page_cache_release(user_pages[i]); | |
8e7d2b2c | 722 | drm_free_large(user_pages); |
3de09aa3 EA |
723 | |
724 | return ret; | |
725 | } | |
726 | ||
40123c1f EA |
727 | /** |
728 | * This is the fast shmem pwrite path, which attempts to directly | |
729 | * copy_from_user into the kmapped pages backing the object. | |
730 | */ | |
3043c60c | 731 | static int |
40123c1f EA |
732 | i915_gem_shmem_pwrite_fast(struct drm_device *dev, struct drm_gem_object *obj, |
733 | struct drm_i915_gem_pwrite *args, | |
734 | struct drm_file *file_priv) | |
673a394b | 735 | { |
40123c1f EA |
736 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
737 | ssize_t remain; | |
738 | loff_t offset, page_base; | |
739 | char __user *user_data; | |
740 | int page_offset, page_length; | |
673a394b | 741 | int ret; |
40123c1f EA |
742 | |
743 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
744 | remain = args->size; | |
673a394b EA |
745 | |
746 | mutex_lock(&dev->struct_mutex); | |
747 | ||
40123c1f EA |
748 | ret = i915_gem_object_get_pages(obj); |
749 | if (ret != 0) | |
750 | goto fail_unlock; | |
673a394b | 751 | |
e47c68e9 | 752 | ret = i915_gem_object_set_to_cpu_domain(obj, 1); |
40123c1f EA |
753 | if (ret != 0) |
754 | goto fail_put_pages; | |
755 | ||
756 | obj_priv = obj->driver_private; | |
757 | offset = args->offset; | |
758 | obj_priv->dirty = 1; | |
759 | ||
760 | while (remain > 0) { | |
761 | /* Operation in this page | |
762 | * | |
763 | * page_base = page offset within aperture | |
764 | * page_offset = offset within page | |
765 | * page_length = bytes to copy for this page | |
766 | */ | |
767 | page_base = (offset & ~(PAGE_SIZE-1)); | |
768 | page_offset = offset & (PAGE_SIZE-1); | |
769 | page_length = remain; | |
770 | if ((page_offset + remain) > PAGE_SIZE) | |
771 | page_length = PAGE_SIZE - page_offset; | |
772 | ||
773 | ret = fast_shmem_write(obj_priv->pages, | |
774 | page_base, page_offset, | |
775 | user_data, page_length); | |
776 | if (ret) | |
777 | goto fail_put_pages; | |
778 | ||
779 | remain -= page_length; | |
780 | user_data += page_length; | |
781 | offset += page_length; | |
782 | } | |
783 | ||
784 | fail_put_pages: | |
785 | i915_gem_object_put_pages(obj); | |
786 | fail_unlock: | |
787 | mutex_unlock(&dev->struct_mutex); | |
788 | ||
789 | return ret; | |
790 | } | |
791 | ||
792 | /** | |
793 | * This is the fallback shmem pwrite path, which uses get_user_pages to pin | |
794 | * the memory and maps it using kmap_atomic for copying. | |
795 | * | |
796 | * This avoids taking mmap_sem for faulting on the user's address while the | |
797 | * struct_mutex is held. | |
798 | */ | |
799 | static int | |
800 | i915_gem_shmem_pwrite_slow(struct drm_device *dev, struct drm_gem_object *obj, | |
801 | struct drm_i915_gem_pwrite *args, | |
802 | struct drm_file *file_priv) | |
803 | { | |
804 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
805 | struct mm_struct *mm = current->mm; | |
806 | struct page **user_pages; | |
807 | ssize_t remain; | |
808 | loff_t offset, pinned_pages, i; | |
809 | loff_t first_data_page, last_data_page, num_pages; | |
810 | int shmem_page_index, shmem_page_offset; | |
811 | int data_page_index, data_page_offset; | |
812 | int page_length; | |
813 | int ret; | |
814 | uint64_t data_ptr = args->data_ptr; | |
280b713b | 815 | int do_bit17_swizzling; |
40123c1f EA |
816 | |
817 | remain = args->size; | |
818 | ||
819 | /* Pin the user pages containing the data. We can't fault while | |
820 | * holding the struct mutex, and all of the pwrite implementations | |
821 | * want to hold it while dereferencing the user data. | |
822 | */ | |
823 | first_data_page = data_ptr / PAGE_SIZE; | |
824 | last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE; | |
825 | num_pages = last_data_page - first_data_page + 1; | |
826 | ||
8e7d2b2c | 827 | user_pages = drm_calloc_large(num_pages, sizeof(struct page *)); |
40123c1f EA |
828 | if (user_pages == NULL) |
829 | return -ENOMEM; | |
830 | ||
831 | down_read(&mm->mmap_sem); | |
832 | pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr, | |
833 | num_pages, 0, 0, user_pages, NULL); | |
834 | up_read(&mm->mmap_sem); | |
835 | if (pinned_pages < num_pages) { | |
836 | ret = -EFAULT; | |
837 | goto fail_put_user_pages; | |
673a394b EA |
838 | } |
839 | ||
280b713b EA |
840 | do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj); |
841 | ||
40123c1f EA |
842 | mutex_lock(&dev->struct_mutex); |
843 | ||
844 | ret = i915_gem_object_get_pages(obj); | |
845 | if (ret != 0) | |
846 | goto fail_unlock; | |
847 | ||
848 | ret = i915_gem_object_set_to_cpu_domain(obj, 1); | |
849 | if (ret != 0) | |
850 | goto fail_put_pages; | |
851 | ||
852 | obj_priv = obj->driver_private; | |
673a394b | 853 | offset = args->offset; |
40123c1f | 854 | obj_priv->dirty = 1; |
673a394b | 855 | |
40123c1f EA |
856 | while (remain > 0) { |
857 | /* Operation in this page | |
858 | * | |
859 | * shmem_page_index = page number within shmem file | |
860 | * shmem_page_offset = offset within page in shmem file | |
861 | * data_page_index = page number in get_user_pages return | |
862 | * data_page_offset = offset with data_page_index page. | |
863 | * page_length = bytes to copy for this page | |
864 | */ | |
865 | shmem_page_index = offset / PAGE_SIZE; | |
866 | shmem_page_offset = offset & ~PAGE_MASK; | |
867 | data_page_index = data_ptr / PAGE_SIZE - first_data_page; | |
868 | data_page_offset = data_ptr & ~PAGE_MASK; | |
869 | ||
870 | page_length = remain; | |
871 | if ((shmem_page_offset + page_length) > PAGE_SIZE) | |
872 | page_length = PAGE_SIZE - shmem_page_offset; | |
873 | if ((data_page_offset + page_length) > PAGE_SIZE) | |
874 | page_length = PAGE_SIZE - data_page_offset; | |
875 | ||
280b713b EA |
876 | if (do_bit17_swizzling) { |
877 | ret = slow_shmem_bit17_copy(obj_priv->pages[shmem_page_index], | |
878 | shmem_page_offset, | |
879 | user_pages[data_page_index], | |
880 | data_page_offset, | |
881 | page_length, | |
882 | 0); | |
883 | } else { | |
884 | ret = slow_shmem_copy(obj_priv->pages[shmem_page_index], | |
885 | shmem_page_offset, | |
886 | user_pages[data_page_index], | |
887 | data_page_offset, | |
888 | page_length); | |
889 | } | |
40123c1f EA |
890 | if (ret) |
891 | goto fail_put_pages; | |
892 | ||
893 | remain -= page_length; | |
894 | data_ptr += page_length; | |
895 | offset += page_length; | |
673a394b EA |
896 | } |
897 | ||
40123c1f EA |
898 | fail_put_pages: |
899 | i915_gem_object_put_pages(obj); | |
900 | fail_unlock: | |
673a394b | 901 | mutex_unlock(&dev->struct_mutex); |
40123c1f EA |
902 | fail_put_user_pages: |
903 | for (i = 0; i < pinned_pages; i++) | |
904 | page_cache_release(user_pages[i]); | |
8e7d2b2c | 905 | drm_free_large(user_pages); |
673a394b | 906 | |
40123c1f | 907 | return ret; |
673a394b EA |
908 | } |
909 | ||
910 | /** | |
911 | * Writes data to the object referenced by handle. | |
912 | * | |
913 | * On error, the contents of the buffer that were to be modified are undefined. | |
914 | */ | |
915 | int | |
916 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, | |
917 | struct drm_file *file_priv) | |
918 | { | |
919 | struct drm_i915_gem_pwrite *args = data; | |
920 | struct drm_gem_object *obj; | |
921 | struct drm_i915_gem_object *obj_priv; | |
922 | int ret = 0; | |
923 | ||
924 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
925 | if (obj == NULL) | |
926 | return -EBADF; | |
927 | obj_priv = obj->driver_private; | |
928 | ||
929 | /* Bounds check destination. | |
930 | * | |
931 | * XXX: This could use review for overflow issues... | |
932 | */ | |
933 | if (args->offset > obj->size || args->size > obj->size || | |
934 | args->offset + args->size > obj->size) { | |
935 | drm_gem_object_unreference(obj); | |
936 | return -EINVAL; | |
937 | } | |
938 | ||
939 | /* We can only do the GTT pwrite on untiled buffers, as otherwise | |
940 | * it would end up going through the fenced access, and we'll get | |
941 | * different detiling behavior between reading and writing. | |
942 | * pread/pwrite currently are reading and writing from the CPU | |
943 | * perspective, requiring manual detiling by the client. | |
944 | */ | |
71acb5eb DA |
945 | if (obj_priv->phys_obj) |
946 | ret = i915_gem_phys_pwrite(dev, obj, args, file_priv); | |
947 | else if (obj_priv->tiling_mode == I915_TILING_NONE && | |
3de09aa3 EA |
948 | dev->gtt_total != 0) { |
949 | ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file_priv); | |
950 | if (ret == -EFAULT) { | |
951 | ret = i915_gem_gtt_pwrite_slow(dev, obj, args, | |
952 | file_priv); | |
953 | } | |
280b713b EA |
954 | } else if (i915_gem_object_needs_bit17_swizzle(obj)) { |
955 | ret = i915_gem_shmem_pwrite_slow(dev, obj, args, file_priv); | |
40123c1f EA |
956 | } else { |
957 | ret = i915_gem_shmem_pwrite_fast(dev, obj, args, file_priv); | |
958 | if (ret == -EFAULT) { | |
959 | ret = i915_gem_shmem_pwrite_slow(dev, obj, args, | |
960 | file_priv); | |
961 | } | |
962 | } | |
673a394b EA |
963 | |
964 | #if WATCH_PWRITE | |
965 | if (ret) | |
966 | DRM_INFO("pwrite failed %d\n", ret); | |
967 | #endif | |
968 | ||
969 | drm_gem_object_unreference(obj); | |
970 | ||
971 | return ret; | |
972 | } | |
973 | ||
974 | /** | |
2ef7eeaa EA |
975 | * Called when user space prepares to use an object with the CPU, either |
976 | * through the mmap ioctl's mapping or a GTT mapping. | |
673a394b EA |
977 | */ |
978 | int | |
979 | i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, | |
980 | struct drm_file *file_priv) | |
981 | { | |
982 | struct drm_i915_gem_set_domain *args = data; | |
983 | struct drm_gem_object *obj; | |
2ef7eeaa EA |
984 | uint32_t read_domains = args->read_domains; |
985 | uint32_t write_domain = args->write_domain; | |
673a394b EA |
986 | int ret; |
987 | ||
988 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
989 | return -ENODEV; | |
990 | ||
2ef7eeaa | 991 | /* Only handle setting domains to types used by the CPU. */ |
21d509e3 | 992 | if (write_domain & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
993 | return -EINVAL; |
994 | ||
21d509e3 | 995 | if (read_domains & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
996 | return -EINVAL; |
997 | ||
998 | /* Having something in the write domain implies it's in the read | |
999 | * domain, and only that read domain. Enforce that in the request. | |
1000 | */ | |
1001 | if (write_domain != 0 && read_domains != write_domain) | |
1002 | return -EINVAL; | |
1003 | ||
673a394b EA |
1004 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
1005 | if (obj == NULL) | |
1006 | return -EBADF; | |
1007 | ||
1008 | mutex_lock(&dev->struct_mutex); | |
1009 | #if WATCH_BUF | |
cfd43c02 | 1010 | DRM_INFO("set_domain_ioctl %p(%zd), %08x %08x\n", |
2ef7eeaa | 1011 | obj, obj->size, read_domains, write_domain); |
673a394b | 1012 | #endif |
2ef7eeaa EA |
1013 | if (read_domains & I915_GEM_DOMAIN_GTT) { |
1014 | ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0); | |
02354392 EA |
1015 | |
1016 | /* Silently promote "you're not bound, there was nothing to do" | |
1017 | * to success, since the client was just asking us to | |
1018 | * make sure everything was done. | |
1019 | */ | |
1020 | if (ret == -EINVAL) | |
1021 | ret = 0; | |
2ef7eeaa | 1022 | } else { |
e47c68e9 | 1023 | ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0); |
2ef7eeaa EA |
1024 | } |
1025 | ||
673a394b EA |
1026 | drm_gem_object_unreference(obj); |
1027 | mutex_unlock(&dev->struct_mutex); | |
1028 | return ret; | |
1029 | } | |
1030 | ||
1031 | /** | |
1032 | * Called when user space has done writes to this buffer | |
1033 | */ | |
1034 | int | |
1035 | i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, | |
1036 | struct drm_file *file_priv) | |
1037 | { | |
1038 | struct drm_i915_gem_sw_finish *args = data; | |
1039 | struct drm_gem_object *obj; | |
1040 | struct drm_i915_gem_object *obj_priv; | |
1041 | int ret = 0; | |
1042 | ||
1043 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
1044 | return -ENODEV; | |
1045 | ||
1046 | mutex_lock(&dev->struct_mutex); | |
1047 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
1048 | if (obj == NULL) { | |
1049 | mutex_unlock(&dev->struct_mutex); | |
1050 | return -EBADF; | |
1051 | } | |
1052 | ||
1053 | #if WATCH_BUF | |
cfd43c02 | 1054 | DRM_INFO("%s: sw_finish %d (%p %zd)\n", |
673a394b EA |
1055 | __func__, args->handle, obj, obj->size); |
1056 | #endif | |
1057 | obj_priv = obj->driver_private; | |
1058 | ||
1059 | /* Pinned buffers may be scanout, so flush the cache */ | |
e47c68e9 EA |
1060 | if (obj_priv->pin_count) |
1061 | i915_gem_object_flush_cpu_write_domain(obj); | |
1062 | ||
673a394b EA |
1063 | drm_gem_object_unreference(obj); |
1064 | mutex_unlock(&dev->struct_mutex); | |
1065 | return ret; | |
1066 | } | |
1067 | ||
1068 | /** | |
1069 | * Maps the contents of an object, returning the address it is mapped | |
1070 | * into. | |
1071 | * | |
1072 | * While the mapping holds a reference on the contents of the object, it doesn't | |
1073 | * imply a ref on the object itself. | |
1074 | */ | |
1075 | int | |
1076 | i915_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
1077 | struct drm_file *file_priv) | |
1078 | { | |
1079 | struct drm_i915_gem_mmap *args = data; | |
1080 | struct drm_gem_object *obj; | |
1081 | loff_t offset; | |
1082 | unsigned long addr; | |
1083 | ||
1084 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
1085 | return -ENODEV; | |
1086 | ||
1087 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
1088 | if (obj == NULL) | |
1089 | return -EBADF; | |
1090 | ||
1091 | offset = args->offset; | |
1092 | ||
1093 | down_write(¤t->mm->mmap_sem); | |
1094 | addr = do_mmap(obj->filp, 0, args->size, | |
1095 | PROT_READ | PROT_WRITE, MAP_SHARED, | |
1096 | args->offset); | |
1097 | up_write(¤t->mm->mmap_sem); | |
1098 | mutex_lock(&dev->struct_mutex); | |
1099 | drm_gem_object_unreference(obj); | |
1100 | mutex_unlock(&dev->struct_mutex); | |
1101 | if (IS_ERR((void *)addr)) | |
1102 | return addr; | |
1103 | ||
1104 | args->addr_ptr = (uint64_t) addr; | |
1105 | ||
1106 | return 0; | |
1107 | } | |
1108 | ||
de151cf6 JB |
1109 | /** |
1110 | * i915_gem_fault - fault a page into the GTT | |
1111 | * vma: VMA in question | |
1112 | * vmf: fault info | |
1113 | * | |
1114 | * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped | |
1115 | * from userspace. The fault handler takes care of binding the object to | |
1116 | * the GTT (if needed), allocating and programming a fence register (again, | |
1117 | * only if needed based on whether the old reg is still valid or the object | |
1118 | * is tiled) and inserting a new PTE into the faulting process. | |
1119 | * | |
1120 | * Note that the faulting process may involve evicting existing objects | |
1121 | * from the GTT and/or fence registers to make room. So performance may | |
1122 | * suffer if the GTT working set is large or there are few fence registers | |
1123 | * left. | |
1124 | */ | |
1125 | int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1126 | { | |
1127 | struct drm_gem_object *obj = vma->vm_private_data; | |
1128 | struct drm_device *dev = obj->dev; | |
1129 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1130 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1131 | pgoff_t page_offset; | |
1132 | unsigned long pfn; | |
1133 | int ret = 0; | |
0f973f27 | 1134 | bool write = !!(vmf->flags & FAULT_FLAG_WRITE); |
de151cf6 JB |
1135 | |
1136 | /* We don't use vmf->pgoff since that has the fake offset */ | |
1137 | page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> | |
1138 | PAGE_SHIFT; | |
1139 | ||
1140 | /* Now bind it into the GTT if needed */ | |
1141 | mutex_lock(&dev->struct_mutex); | |
1142 | if (!obj_priv->gtt_space) { | |
1143 | ret = i915_gem_object_bind_to_gtt(obj, obj_priv->gtt_alignment); | |
1144 | if (ret) { | |
1145 | mutex_unlock(&dev->struct_mutex); | |
1146 | return VM_FAULT_SIGBUS; | |
1147 | } | |
07f4f3e8 KH |
1148 | |
1149 | ret = i915_gem_object_set_to_gtt_domain(obj, write); | |
1150 | if (ret) { | |
1151 | mutex_unlock(&dev->struct_mutex); | |
1152 | return VM_FAULT_SIGBUS; | |
1153 | } | |
1154 | ||
14b60391 | 1155 | list_add_tail(&obj_priv->list, &dev_priv->mm.inactive_list); |
de151cf6 JB |
1156 | } |
1157 | ||
1158 | /* Need a new fence register? */ | |
1159 | if (obj_priv->fence_reg == I915_FENCE_REG_NONE && | |
d9ddcb96 | 1160 | obj_priv->tiling_mode != I915_TILING_NONE) { |
8c4b8c3f | 1161 | ret = i915_gem_object_get_fence_reg(obj); |
7d8d58b2 CW |
1162 | if (ret) { |
1163 | mutex_unlock(&dev->struct_mutex); | |
d9ddcb96 | 1164 | return VM_FAULT_SIGBUS; |
7d8d58b2 | 1165 | } |
d9ddcb96 | 1166 | } |
de151cf6 JB |
1167 | |
1168 | pfn = ((dev->agp->base + obj_priv->gtt_offset) >> PAGE_SHIFT) + | |
1169 | page_offset; | |
1170 | ||
1171 | /* Finally, remap it using the new GTT offset */ | |
1172 | ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn); | |
1173 | ||
1174 | mutex_unlock(&dev->struct_mutex); | |
1175 | ||
1176 | switch (ret) { | |
1177 | case -ENOMEM: | |
1178 | case -EAGAIN: | |
1179 | return VM_FAULT_OOM; | |
1180 | case -EFAULT: | |
959b887c | 1181 | case -EINVAL: |
de151cf6 JB |
1182 | return VM_FAULT_SIGBUS; |
1183 | default: | |
1184 | return VM_FAULT_NOPAGE; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | /** | |
1189 | * i915_gem_create_mmap_offset - create a fake mmap offset for an object | |
1190 | * @obj: obj in question | |
1191 | * | |
1192 | * GEM memory mapping works by handing back to userspace a fake mmap offset | |
1193 | * it can use in a subsequent mmap(2) call. The DRM core code then looks | |
1194 | * up the object based on the offset and sets up the various memory mapping | |
1195 | * structures. | |
1196 | * | |
1197 | * This routine allocates and attaches a fake offset for @obj. | |
1198 | */ | |
1199 | static int | |
1200 | i915_gem_create_mmap_offset(struct drm_gem_object *obj) | |
1201 | { | |
1202 | struct drm_device *dev = obj->dev; | |
1203 | struct drm_gem_mm *mm = dev->mm_private; | |
1204 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1205 | struct drm_map_list *list; | |
f77d390c | 1206 | struct drm_local_map *map; |
de151cf6 JB |
1207 | int ret = 0; |
1208 | ||
1209 | /* Set the object up for mmap'ing */ | |
1210 | list = &obj->map_list; | |
9a298b2a | 1211 | list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL); |
de151cf6 JB |
1212 | if (!list->map) |
1213 | return -ENOMEM; | |
1214 | ||
1215 | map = list->map; | |
1216 | map->type = _DRM_GEM; | |
1217 | map->size = obj->size; | |
1218 | map->handle = obj; | |
1219 | ||
1220 | /* Get a DRM GEM mmap offset allocated... */ | |
1221 | list->file_offset_node = drm_mm_search_free(&mm->offset_manager, | |
1222 | obj->size / PAGE_SIZE, 0, 0); | |
1223 | if (!list->file_offset_node) { | |
1224 | DRM_ERROR("failed to allocate offset for bo %d\n", obj->name); | |
1225 | ret = -ENOMEM; | |
1226 | goto out_free_list; | |
1227 | } | |
1228 | ||
1229 | list->file_offset_node = drm_mm_get_block(list->file_offset_node, | |
1230 | obj->size / PAGE_SIZE, 0); | |
1231 | if (!list->file_offset_node) { | |
1232 | ret = -ENOMEM; | |
1233 | goto out_free_list; | |
1234 | } | |
1235 | ||
1236 | list->hash.key = list->file_offset_node->start; | |
1237 | if (drm_ht_insert_item(&mm->offset_hash, &list->hash)) { | |
1238 | DRM_ERROR("failed to add to map hash\n"); | |
1239 | goto out_free_mm; | |
1240 | } | |
1241 | ||
1242 | /* By now we should be all set, any drm_mmap request on the offset | |
1243 | * below will get to our mmap & fault handler */ | |
1244 | obj_priv->mmap_offset = ((uint64_t) list->hash.key) << PAGE_SHIFT; | |
1245 | ||
1246 | return 0; | |
1247 | ||
1248 | out_free_mm: | |
1249 | drm_mm_put_block(list->file_offset_node); | |
1250 | out_free_list: | |
9a298b2a | 1251 | kfree(list->map); |
de151cf6 JB |
1252 | |
1253 | return ret; | |
1254 | } | |
1255 | ||
901782b2 CW |
1256 | /** |
1257 | * i915_gem_release_mmap - remove physical page mappings | |
1258 | * @obj: obj in question | |
1259 | * | |
1260 | * Preserve the reservation of the mmaping with the DRM core code, but | |
1261 | * relinquish ownership of the pages back to the system. | |
1262 | * | |
1263 | * It is vital that we remove the page mapping if we have mapped a tiled | |
1264 | * object through the GTT and then lose the fence register due to | |
1265 | * resource pressure. Similarly if the object has been moved out of the | |
1266 | * aperture, than pages mapped into userspace must be revoked. Removing the | |
1267 | * mapping will then trigger a page fault on the next user access, allowing | |
1268 | * fixup by i915_gem_fault(). | |
1269 | */ | |
d05ca301 | 1270 | void |
901782b2 CW |
1271 | i915_gem_release_mmap(struct drm_gem_object *obj) |
1272 | { | |
1273 | struct drm_device *dev = obj->dev; | |
1274 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1275 | ||
1276 | if (dev->dev_mapping) | |
1277 | unmap_mapping_range(dev->dev_mapping, | |
1278 | obj_priv->mmap_offset, obj->size, 1); | |
1279 | } | |
1280 | ||
ab00b3e5 JB |
1281 | static void |
1282 | i915_gem_free_mmap_offset(struct drm_gem_object *obj) | |
1283 | { | |
1284 | struct drm_device *dev = obj->dev; | |
1285 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1286 | struct drm_gem_mm *mm = dev->mm_private; | |
1287 | struct drm_map_list *list; | |
1288 | ||
1289 | list = &obj->map_list; | |
1290 | drm_ht_remove_item(&mm->offset_hash, &list->hash); | |
1291 | ||
1292 | if (list->file_offset_node) { | |
1293 | drm_mm_put_block(list->file_offset_node); | |
1294 | list->file_offset_node = NULL; | |
1295 | } | |
1296 | ||
1297 | if (list->map) { | |
9a298b2a | 1298 | kfree(list->map); |
ab00b3e5 JB |
1299 | list->map = NULL; |
1300 | } | |
1301 | ||
1302 | obj_priv->mmap_offset = 0; | |
1303 | } | |
1304 | ||
de151cf6 JB |
1305 | /** |
1306 | * i915_gem_get_gtt_alignment - return required GTT alignment for an object | |
1307 | * @obj: object to check | |
1308 | * | |
1309 | * Return the required GTT alignment for an object, taking into account | |
1310 | * potential fence register mapping if needed. | |
1311 | */ | |
1312 | static uint32_t | |
1313 | i915_gem_get_gtt_alignment(struct drm_gem_object *obj) | |
1314 | { | |
1315 | struct drm_device *dev = obj->dev; | |
1316 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1317 | int start, i; | |
1318 | ||
1319 | /* | |
1320 | * Minimum alignment is 4k (GTT page size), but might be greater | |
1321 | * if a fence register is needed for the object. | |
1322 | */ | |
1323 | if (IS_I965G(dev) || obj_priv->tiling_mode == I915_TILING_NONE) | |
1324 | return 4096; | |
1325 | ||
1326 | /* | |
1327 | * Previous chips need to be aligned to the size of the smallest | |
1328 | * fence register that can contain the object. | |
1329 | */ | |
1330 | if (IS_I9XX(dev)) | |
1331 | start = 1024*1024; | |
1332 | else | |
1333 | start = 512*1024; | |
1334 | ||
1335 | for (i = start; i < obj->size; i <<= 1) | |
1336 | ; | |
1337 | ||
1338 | return i; | |
1339 | } | |
1340 | ||
1341 | /** | |
1342 | * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing | |
1343 | * @dev: DRM device | |
1344 | * @data: GTT mapping ioctl data | |
1345 | * @file_priv: GEM object info | |
1346 | * | |
1347 | * Simply returns the fake offset to userspace so it can mmap it. | |
1348 | * The mmap call will end up in drm_gem_mmap(), which will set things | |
1349 | * up so we can get faults in the handler above. | |
1350 | * | |
1351 | * The fault handler will take care of binding the object into the GTT | |
1352 | * (since it may have been evicted to make room for something), allocating | |
1353 | * a fence register, and mapping the appropriate aperture address into | |
1354 | * userspace. | |
1355 | */ | |
1356 | int | |
1357 | i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, | |
1358 | struct drm_file *file_priv) | |
1359 | { | |
1360 | struct drm_i915_gem_mmap_gtt *args = data; | |
1361 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1362 | struct drm_gem_object *obj; | |
1363 | struct drm_i915_gem_object *obj_priv; | |
1364 | int ret; | |
1365 | ||
1366 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
1367 | return -ENODEV; | |
1368 | ||
1369 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
1370 | if (obj == NULL) | |
1371 | return -EBADF; | |
1372 | ||
1373 | mutex_lock(&dev->struct_mutex); | |
1374 | ||
1375 | obj_priv = obj->driver_private; | |
1376 | ||
1377 | if (!obj_priv->mmap_offset) { | |
1378 | ret = i915_gem_create_mmap_offset(obj); | |
13af1062 CW |
1379 | if (ret) { |
1380 | drm_gem_object_unreference(obj); | |
1381 | mutex_unlock(&dev->struct_mutex); | |
de151cf6 | 1382 | return ret; |
13af1062 | 1383 | } |
de151cf6 JB |
1384 | } |
1385 | ||
1386 | args->offset = obj_priv->mmap_offset; | |
1387 | ||
1388 | obj_priv->gtt_alignment = i915_gem_get_gtt_alignment(obj); | |
1389 | ||
1390 | /* Make sure the alignment is correct for fence regs etc */ | |
1391 | if (obj_priv->agp_mem && | |
1392 | (obj_priv->gtt_offset & (obj_priv->gtt_alignment - 1))) { | |
1393 | drm_gem_object_unreference(obj); | |
1394 | mutex_unlock(&dev->struct_mutex); | |
1395 | return -EINVAL; | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * Pull it into the GTT so that we have a page list (makes the | |
1400 | * initial fault faster and any subsequent flushing possible). | |
1401 | */ | |
1402 | if (!obj_priv->agp_mem) { | |
1403 | ret = i915_gem_object_bind_to_gtt(obj, obj_priv->gtt_alignment); | |
1404 | if (ret) { | |
1405 | drm_gem_object_unreference(obj); | |
1406 | mutex_unlock(&dev->struct_mutex); | |
1407 | return ret; | |
1408 | } | |
14b60391 | 1409 | list_add_tail(&obj_priv->list, &dev_priv->mm.inactive_list); |
de151cf6 JB |
1410 | } |
1411 | ||
1412 | drm_gem_object_unreference(obj); | |
1413 | mutex_unlock(&dev->struct_mutex); | |
1414 | ||
1415 | return 0; | |
1416 | } | |
1417 | ||
6911a9b8 | 1418 | void |
856fa198 | 1419 | i915_gem_object_put_pages(struct drm_gem_object *obj) |
673a394b EA |
1420 | { |
1421 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1422 | int page_count = obj->size / PAGE_SIZE; | |
1423 | int i; | |
1424 | ||
856fa198 | 1425 | BUG_ON(obj_priv->pages_refcount == 0); |
673a394b | 1426 | |
856fa198 EA |
1427 | if (--obj_priv->pages_refcount != 0) |
1428 | return; | |
673a394b | 1429 | |
280b713b EA |
1430 | if (obj_priv->tiling_mode != I915_TILING_NONE) |
1431 | i915_gem_object_save_bit_17_swizzle(obj); | |
1432 | ||
673a394b | 1433 | for (i = 0; i < page_count; i++) |
856fa198 | 1434 | if (obj_priv->pages[i] != NULL) { |
673a394b | 1435 | if (obj_priv->dirty) |
856fa198 EA |
1436 | set_page_dirty(obj_priv->pages[i]); |
1437 | mark_page_accessed(obj_priv->pages[i]); | |
1438 | page_cache_release(obj_priv->pages[i]); | |
673a394b EA |
1439 | } |
1440 | obj_priv->dirty = 0; | |
1441 | ||
8e7d2b2c | 1442 | drm_free_large(obj_priv->pages); |
856fa198 | 1443 | obj_priv->pages = NULL; |
673a394b EA |
1444 | } |
1445 | ||
1446 | static void | |
ce44b0ea | 1447 | i915_gem_object_move_to_active(struct drm_gem_object *obj, uint32_t seqno) |
673a394b EA |
1448 | { |
1449 | struct drm_device *dev = obj->dev; | |
1450 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1451 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1452 | ||
1453 | /* Add a reference if we're newly entering the active list. */ | |
1454 | if (!obj_priv->active) { | |
1455 | drm_gem_object_reference(obj); | |
1456 | obj_priv->active = 1; | |
1457 | } | |
1458 | /* Move from whatever list we were on to the tail of execution. */ | |
5e118f41 | 1459 | spin_lock(&dev_priv->mm.active_list_lock); |
673a394b EA |
1460 | list_move_tail(&obj_priv->list, |
1461 | &dev_priv->mm.active_list); | |
5e118f41 | 1462 | spin_unlock(&dev_priv->mm.active_list_lock); |
ce44b0ea | 1463 | obj_priv->last_rendering_seqno = seqno; |
673a394b EA |
1464 | } |
1465 | ||
ce44b0ea EA |
1466 | static void |
1467 | i915_gem_object_move_to_flushing(struct drm_gem_object *obj) | |
1468 | { | |
1469 | struct drm_device *dev = obj->dev; | |
1470 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1471 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1472 | ||
1473 | BUG_ON(!obj_priv->active); | |
1474 | list_move_tail(&obj_priv->list, &dev_priv->mm.flushing_list); | |
1475 | obj_priv->last_rendering_seqno = 0; | |
1476 | } | |
673a394b EA |
1477 | |
1478 | static void | |
1479 | i915_gem_object_move_to_inactive(struct drm_gem_object *obj) | |
1480 | { | |
1481 | struct drm_device *dev = obj->dev; | |
1482 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1483 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1484 | ||
1485 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1486 | if (obj_priv->pin_count != 0) | |
1487 | list_del_init(&obj_priv->list); | |
1488 | else | |
1489 | list_move_tail(&obj_priv->list, &dev_priv->mm.inactive_list); | |
1490 | ||
ce44b0ea | 1491 | obj_priv->last_rendering_seqno = 0; |
673a394b EA |
1492 | if (obj_priv->active) { |
1493 | obj_priv->active = 0; | |
1494 | drm_gem_object_unreference(obj); | |
1495 | } | |
1496 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1497 | } | |
1498 | ||
1499 | /** | |
1500 | * Creates a new sequence number, emitting a write of it to the status page | |
1501 | * plus an interrupt, which will trigger i915_user_interrupt_handler. | |
1502 | * | |
1503 | * Must be called with struct_lock held. | |
1504 | * | |
1505 | * Returned sequence numbers are nonzero on success. | |
1506 | */ | |
1507 | static uint32_t | |
b962442e EA |
1508 | i915_add_request(struct drm_device *dev, struct drm_file *file_priv, |
1509 | uint32_t flush_domains) | |
673a394b EA |
1510 | { |
1511 | drm_i915_private_t *dev_priv = dev->dev_private; | |
b962442e | 1512 | struct drm_i915_file_private *i915_file_priv = NULL; |
673a394b EA |
1513 | struct drm_i915_gem_request *request; |
1514 | uint32_t seqno; | |
1515 | int was_empty; | |
1516 | RING_LOCALS; | |
1517 | ||
b962442e EA |
1518 | if (file_priv != NULL) |
1519 | i915_file_priv = file_priv->driver_priv; | |
1520 | ||
9a298b2a | 1521 | request = kzalloc(sizeof(*request), GFP_KERNEL); |
673a394b EA |
1522 | if (request == NULL) |
1523 | return 0; | |
1524 | ||
1525 | /* Grab the seqno we're going to make this request be, and bump the | |
1526 | * next (skipping 0 so it can be the reserved no-seqno value). | |
1527 | */ | |
1528 | seqno = dev_priv->mm.next_gem_seqno; | |
1529 | dev_priv->mm.next_gem_seqno++; | |
1530 | if (dev_priv->mm.next_gem_seqno == 0) | |
1531 | dev_priv->mm.next_gem_seqno++; | |
1532 | ||
1533 | BEGIN_LP_RING(4); | |
1534 | OUT_RING(MI_STORE_DWORD_INDEX); | |
1535 | OUT_RING(I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); | |
1536 | OUT_RING(seqno); | |
1537 | ||
1538 | OUT_RING(MI_USER_INTERRUPT); | |
1539 | ADVANCE_LP_RING(); | |
1540 | ||
1541 | DRM_DEBUG("%d\n", seqno); | |
1542 | ||
1543 | request->seqno = seqno; | |
1544 | request->emitted_jiffies = jiffies; | |
673a394b EA |
1545 | was_empty = list_empty(&dev_priv->mm.request_list); |
1546 | list_add_tail(&request->list, &dev_priv->mm.request_list); | |
b962442e EA |
1547 | if (i915_file_priv) { |
1548 | list_add_tail(&request->client_list, | |
1549 | &i915_file_priv->mm.request_list); | |
1550 | } else { | |
1551 | INIT_LIST_HEAD(&request->client_list); | |
1552 | } | |
673a394b | 1553 | |
ce44b0ea EA |
1554 | /* Associate any objects on the flushing list matching the write |
1555 | * domain we're flushing with our flush. | |
1556 | */ | |
1557 | if (flush_domains != 0) { | |
1558 | struct drm_i915_gem_object *obj_priv, *next; | |
1559 | ||
1560 | list_for_each_entry_safe(obj_priv, next, | |
1561 | &dev_priv->mm.flushing_list, list) { | |
1562 | struct drm_gem_object *obj = obj_priv->obj; | |
1563 | ||
1564 | if ((obj->write_domain & flush_domains) == | |
1565 | obj->write_domain) { | |
1566 | obj->write_domain = 0; | |
1567 | i915_gem_object_move_to_active(obj, seqno); | |
1568 | } | |
1569 | } | |
1570 | ||
1571 | } | |
1572 | ||
6dbe2772 | 1573 | if (was_empty && !dev_priv->mm.suspended) |
9c9fe1f8 | 1574 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); |
673a394b EA |
1575 | return seqno; |
1576 | } | |
1577 | ||
1578 | /** | |
1579 | * Command execution barrier | |
1580 | * | |
1581 | * Ensures that all commands in the ring are finished | |
1582 | * before signalling the CPU | |
1583 | */ | |
3043c60c | 1584 | static uint32_t |
673a394b EA |
1585 | i915_retire_commands(struct drm_device *dev) |
1586 | { | |
1587 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1588 | uint32_t cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; | |
1589 | uint32_t flush_domains = 0; | |
1590 | RING_LOCALS; | |
1591 | ||
1592 | /* The sampler always gets flushed on i965 (sigh) */ | |
1593 | if (IS_I965G(dev)) | |
1594 | flush_domains |= I915_GEM_DOMAIN_SAMPLER; | |
1595 | BEGIN_LP_RING(2); | |
1596 | OUT_RING(cmd); | |
1597 | OUT_RING(0); /* noop */ | |
1598 | ADVANCE_LP_RING(); | |
1599 | return flush_domains; | |
1600 | } | |
1601 | ||
1602 | /** | |
1603 | * Moves buffers associated only with the given active seqno from the active | |
1604 | * to inactive list, potentially freeing them. | |
1605 | */ | |
1606 | static void | |
1607 | i915_gem_retire_request(struct drm_device *dev, | |
1608 | struct drm_i915_gem_request *request) | |
1609 | { | |
1610 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1611 | ||
1612 | /* Move any buffers on the active list that are no longer referenced | |
1613 | * by the ringbuffer to the flushing/inactive lists as appropriate. | |
1614 | */ | |
5e118f41 | 1615 | spin_lock(&dev_priv->mm.active_list_lock); |
673a394b EA |
1616 | while (!list_empty(&dev_priv->mm.active_list)) { |
1617 | struct drm_gem_object *obj; | |
1618 | struct drm_i915_gem_object *obj_priv; | |
1619 | ||
1620 | obj_priv = list_first_entry(&dev_priv->mm.active_list, | |
1621 | struct drm_i915_gem_object, | |
1622 | list); | |
1623 | obj = obj_priv->obj; | |
1624 | ||
1625 | /* If the seqno being retired doesn't match the oldest in the | |
1626 | * list, then the oldest in the list must still be newer than | |
1627 | * this seqno. | |
1628 | */ | |
1629 | if (obj_priv->last_rendering_seqno != request->seqno) | |
5e118f41 | 1630 | goto out; |
de151cf6 | 1631 | |
673a394b EA |
1632 | #if WATCH_LRU |
1633 | DRM_INFO("%s: retire %d moves to inactive list %p\n", | |
1634 | __func__, request->seqno, obj); | |
1635 | #endif | |
1636 | ||
ce44b0ea EA |
1637 | if (obj->write_domain != 0) |
1638 | i915_gem_object_move_to_flushing(obj); | |
68c84342 SL |
1639 | else { |
1640 | /* Take a reference on the object so it won't be | |
1641 | * freed while the spinlock is held. The list | |
1642 | * protection for this spinlock is safe when breaking | |
1643 | * the lock like this since the next thing we do | |
1644 | * is just get the head of the list again. | |
1645 | */ | |
1646 | drm_gem_object_reference(obj); | |
673a394b | 1647 | i915_gem_object_move_to_inactive(obj); |
68c84342 SL |
1648 | spin_unlock(&dev_priv->mm.active_list_lock); |
1649 | drm_gem_object_unreference(obj); | |
1650 | spin_lock(&dev_priv->mm.active_list_lock); | |
1651 | } | |
673a394b | 1652 | } |
5e118f41 CW |
1653 | out: |
1654 | spin_unlock(&dev_priv->mm.active_list_lock); | |
673a394b EA |
1655 | } |
1656 | ||
1657 | /** | |
1658 | * Returns true if seq1 is later than seq2. | |
1659 | */ | |
1660 | static int | |
1661 | i915_seqno_passed(uint32_t seq1, uint32_t seq2) | |
1662 | { | |
1663 | return (int32_t)(seq1 - seq2) >= 0; | |
1664 | } | |
1665 | ||
1666 | uint32_t | |
1667 | i915_get_gem_seqno(struct drm_device *dev) | |
1668 | { | |
1669 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1670 | ||
1671 | return READ_HWSP(dev_priv, I915_GEM_HWS_INDEX); | |
1672 | } | |
1673 | ||
1674 | /** | |
1675 | * This function clears the request list as sequence numbers are passed. | |
1676 | */ | |
1677 | void | |
1678 | i915_gem_retire_requests(struct drm_device *dev) | |
1679 | { | |
1680 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1681 | uint32_t seqno; | |
1682 | ||
6c0594a3 KW |
1683 | if (!dev_priv->hw_status_page) |
1684 | return; | |
1685 | ||
673a394b EA |
1686 | seqno = i915_get_gem_seqno(dev); |
1687 | ||
1688 | while (!list_empty(&dev_priv->mm.request_list)) { | |
1689 | struct drm_i915_gem_request *request; | |
1690 | uint32_t retiring_seqno; | |
1691 | ||
1692 | request = list_first_entry(&dev_priv->mm.request_list, | |
1693 | struct drm_i915_gem_request, | |
1694 | list); | |
1695 | retiring_seqno = request->seqno; | |
1696 | ||
1697 | if (i915_seqno_passed(seqno, retiring_seqno) || | |
1698 | dev_priv->mm.wedged) { | |
1699 | i915_gem_retire_request(dev, request); | |
1700 | ||
1701 | list_del(&request->list); | |
b962442e | 1702 | list_del(&request->client_list); |
9a298b2a | 1703 | kfree(request); |
673a394b EA |
1704 | } else |
1705 | break; | |
1706 | } | |
1707 | } | |
1708 | ||
1709 | void | |
1710 | i915_gem_retire_work_handler(struct work_struct *work) | |
1711 | { | |
1712 | drm_i915_private_t *dev_priv; | |
1713 | struct drm_device *dev; | |
1714 | ||
1715 | dev_priv = container_of(work, drm_i915_private_t, | |
1716 | mm.retire_work.work); | |
1717 | dev = dev_priv->dev; | |
1718 | ||
1719 | mutex_lock(&dev->struct_mutex); | |
1720 | i915_gem_retire_requests(dev); | |
6dbe2772 KP |
1721 | if (!dev_priv->mm.suspended && |
1722 | !list_empty(&dev_priv->mm.request_list)) | |
9c9fe1f8 | 1723 | queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ); |
673a394b EA |
1724 | mutex_unlock(&dev->struct_mutex); |
1725 | } | |
1726 | ||
1727 | /** | |
1728 | * Waits for a sequence number to be signaled, and cleans up the | |
1729 | * request and object lists appropriately for that event. | |
1730 | */ | |
3043c60c | 1731 | static int |
673a394b EA |
1732 | i915_wait_request(struct drm_device *dev, uint32_t seqno) |
1733 | { | |
1734 | drm_i915_private_t *dev_priv = dev->dev_private; | |
802c7eb6 | 1735 | u32 ier; |
673a394b EA |
1736 | int ret = 0; |
1737 | ||
1738 | BUG_ON(seqno == 0); | |
1739 | ||
1740 | if (!i915_seqno_passed(i915_get_gem_seqno(dev), seqno)) { | |
036a4a7d ZW |
1741 | if (IS_IGDNG(dev)) |
1742 | ier = I915_READ(DEIER) | I915_READ(GTIER); | |
1743 | else | |
1744 | ier = I915_READ(IER); | |
802c7eb6 JB |
1745 | if (!ier) { |
1746 | DRM_ERROR("something (likely vbetool) disabled " | |
1747 | "interrupts, re-enabling\n"); | |
1748 | i915_driver_irq_preinstall(dev); | |
1749 | i915_driver_irq_postinstall(dev); | |
1750 | } | |
1751 | ||
673a394b EA |
1752 | dev_priv->mm.waiting_gem_seqno = seqno; |
1753 | i915_user_irq_get(dev); | |
1754 | ret = wait_event_interruptible(dev_priv->irq_queue, | |
1755 | i915_seqno_passed(i915_get_gem_seqno(dev), | |
1756 | seqno) || | |
1757 | dev_priv->mm.wedged); | |
1758 | i915_user_irq_put(dev); | |
1759 | dev_priv->mm.waiting_gem_seqno = 0; | |
1760 | } | |
1761 | if (dev_priv->mm.wedged) | |
1762 | ret = -EIO; | |
1763 | ||
1764 | if (ret && ret != -ERESTARTSYS) | |
1765 | DRM_ERROR("%s returns %d (awaiting %d at %d)\n", | |
1766 | __func__, ret, seqno, i915_get_gem_seqno(dev)); | |
1767 | ||
1768 | /* Directly dispatch request retiring. While we have the work queue | |
1769 | * to handle this, the waiter on a request often wants an associated | |
1770 | * buffer to have made it to the inactive list, and we would need | |
1771 | * a separate wait queue to handle that. | |
1772 | */ | |
1773 | if (ret == 0) | |
1774 | i915_gem_retire_requests(dev); | |
1775 | ||
1776 | return ret; | |
1777 | } | |
1778 | ||
1779 | static void | |
1780 | i915_gem_flush(struct drm_device *dev, | |
1781 | uint32_t invalidate_domains, | |
1782 | uint32_t flush_domains) | |
1783 | { | |
1784 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1785 | uint32_t cmd; | |
1786 | RING_LOCALS; | |
1787 | ||
1788 | #if WATCH_EXEC | |
1789 | DRM_INFO("%s: invalidate %08x flush %08x\n", __func__, | |
1790 | invalidate_domains, flush_domains); | |
1791 | #endif | |
1792 | ||
1793 | if (flush_domains & I915_GEM_DOMAIN_CPU) | |
1794 | drm_agp_chipset_flush(dev); | |
1795 | ||
21d509e3 | 1796 | if ((invalidate_domains | flush_domains) & I915_GEM_GPU_DOMAINS) { |
673a394b EA |
1797 | /* |
1798 | * read/write caches: | |
1799 | * | |
1800 | * I915_GEM_DOMAIN_RENDER is always invalidated, but is | |
1801 | * only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is | |
1802 | * also flushed at 2d versus 3d pipeline switches. | |
1803 | * | |
1804 | * read-only caches: | |
1805 | * | |
1806 | * I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if | |
1807 | * MI_READ_FLUSH is set, and is always flushed on 965. | |
1808 | * | |
1809 | * I915_GEM_DOMAIN_COMMAND may not exist? | |
1810 | * | |
1811 | * I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is | |
1812 | * invalidated when MI_EXE_FLUSH is set. | |
1813 | * | |
1814 | * I915_GEM_DOMAIN_VERTEX, which exists on 965, is | |
1815 | * invalidated with every MI_FLUSH. | |
1816 | * | |
1817 | * TLBs: | |
1818 | * | |
1819 | * On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND | |
1820 | * and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and | |
1821 | * I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER | |
1822 | * are flushed at any MI_FLUSH. | |
1823 | */ | |
1824 | ||
1825 | cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; | |
1826 | if ((invalidate_domains|flush_domains) & | |
1827 | I915_GEM_DOMAIN_RENDER) | |
1828 | cmd &= ~MI_NO_WRITE_FLUSH; | |
1829 | if (!IS_I965G(dev)) { | |
1830 | /* | |
1831 | * On the 965, the sampler cache always gets flushed | |
1832 | * and this bit is reserved. | |
1833 | */ | |
1834 | if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER) | |
1835 | cmd |= MI_READ_FLUSH; | |
1836 | } | |
1837 | if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION) | |
1838 | cmd |= MI_EXE_FLUSH; | |
1839 | ||
1840 | #if WATCH_EXEC | |
1841 | DRM_INFO("%s: queue flush %08x to ring\n", __func__, cmd); | |
1842 | #endif | |
1843 | BEGIN_LP_RING(2); | |
1844 | OUT_RING(cmd); | |
1845 | OUT_RING(0); /* noop */ | |
1846 | ADVANCE_LP_RING(); | |
1847 | } | |
1848 | } | |
1849 | ||
1850 | /** | |
1851 | * Ensures that all rendering to the object has completed and the object is | |
1852 | * safe to unbind from the GTT or access from the CPU. | |
1853 | */ | |
1854 | static int | |
1855 | i915_gem_object_wait_rendering(struct drm_gem_object *obj) | |
1856 | { | |
1857 | struct drm_device *dev = obj->dev; | |
1858 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1859 | int ret; | |
1860 | ||
e47c68e9 EA |
1861 | /* This function only exists to support waiting for existing rendering, |
1862 | * not for emitting required flushes. | |
673a394b | 1863 | */ |
e47c68e9 | 1864 | BUG_ON((obj->write_domain & I915_GEM_GPU_DOMAINS) != 0); |
673a394b EA |
1865 | |
1866 | /* If there is rendering queued on the buffer being evicted, wait for | |
1867 | * it. | |
1868 | */ | |
1869 | if (obj_priv->active) { | |
1870 | #if WATCH_BUF | |
1871 | DRM_INFO("%s: object %p wait for seqno %08x\n", | |
1872 | __func__, obj, obj_priv->last_rendering_seqno); | |
1873 | #endif | |
1874 | ret = i915_wait_request(dev, obj_priv->last_rendering_seqno); | |
1875 | if (ret != 0) | |
1876 | return ret; | |
1877 | } | |
1878 | ||
1879 | return 0; | |
1880 | } | |
1881 | ||
1882 | /** | |
1883 | * Unbinds an object from the GTT aperture. | |
1884 | */ | |
0f973f27 | 1885 | int |
673a394b EA |
1886 | i915_gem_object_unbind(struct drm_gem_object *obj) |
1887 | { | |
1888 | struct drm_device *dev = obj->dev; | |
1889 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1890 | int ret = 0; | |
1891 | ||
1892 | #if WATCH_BUF | |
1893 | DRM_INFO("%s:%d %p\n", __func__, __LINE__, obj); | |
1894 | DRM_INFO("gtt_space %p\n", obj_priv->gtt_space); | |
1895 | #endif | |
1896 | if (obj_priv->gtt_space == NULL) | |
1897 | return 0; | |
1898 | ||
1899 | if (obj_priv->pin_count != 0) { | |
1900 | DRM_ERROR("Attempting to unbind pinned buffer\n"); | |
1901 | return -EINVAL; | |
1902 | } | |
1903 | ||
673a394b EA |
1904 | /* Move the object to the CPU domain to ensure that |
1905 | * any possible CPU writes while it's not in the GTT | |
1906 | * are flushed when we go to remap it. This will | |
1907 | * also ensure that all pending GPU writes are finished | |
1908 | * before we unbind. | |
1909 | */ | |
e47c68e9 | 1910 | ret = i915_gem_object_set_to_cpu_domain(obj, 1); |
673a394b | 1911 | if (ret) { |
e47c68e9 EA |
1912 | if (ret != -ERESTARTSYS) |
1913 | DRM_ERROR("set_domain failed: %d\n", ret); | |
673a394b EA |
1914 | return ret; |
1915 | } | |
1916 | ||
1917 | if (obj_priv->agp_mem != NULL) { | |
1918 | drm_unbind_agp(obj_priv->agp_mem); | |
1919 | drm_free_agp(obj_priv->agp_mem, obj->size / PAGE_SIZE); | |
1920 | obj_priv->agp_mem = NULL; | |
1921 | } | |
1922 | ||
1923 | BUG_ON(obj_priv->active); | |
1924 | ||
de151cf6 | 1925 | /* blow away mappings if mapped through GTT */ |
901782b2 | 1926 | i915_gem_release_mmap(obj); |
de151cf6 JB |
1927 | |
1928 | if (obj_priv->fence_reg != I915_FENCE_REG_NONE) | |
1929 | i915_gem_clear_fence_reg(obj); | |
1930 | ||
856fa198 | 1931 | i915_gem_object_put_pages(obj); |
673a394b EA |
1932 | |
1933 | if (obj_priv->gtt_space) { | |
1934 | atomic_dec(&dev->gtt_count); | |
1935 | atomic_sub(obj->size, &dev->gtt_memory); | |
1936 | ||
1937 | drm_mm_put_block(obj_priv->gtt_space); | |
1938 | obj_priv->gtt_space = NULL; | |
1939 | } | |
1940 | ||
1941 | /* Remove ourselves from the LRU list if present. */ | |
1942 | if (!list_empty(&obj_priv->list)) | |
1943 | list_del_init(&obj_priv->list); | |
1944 | ||
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | static int | |
1949 | i915_gem_evict_something(struct drm_device *dev) | |
1950 | { | |
1951 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1952 | struct drm_gem_object *obj; | |
1953 | struct drm_i915_gem_object *obj_priv; | |
1954 | int ret = 0; | |
1955 | ||
1956 | for (;;) { | |
1957 | /* If there's an inactive buffer available now, grab it | |
1958 | * and be done. | |
1959 | */ | |
1960 | if (!list_empty(&dev_priv->mm.inactive_list)) { | |
1961 | obj_priv = list_first_entry(&dev_priv->mm.inactive_list, | |
1962 | struct drm_i915_gem_object, | |
1963 | list); | |
1964 | obj = obj_priv->obj; | |
1965 | BUG_ON(obj_priv->pin_count != 0); | |
1966 | #if WATCH_LRU | |
1967 | DRM_INFO("%s: evicting %p\n", __func__, obj); | |
1968 | #endif | |
1969 | BUG_ON(obj_priv->active); | |
1970 | ||
1971 | /* Wait on the rendering and unbind the buffer. */ | |
1972 | ret = i915_gem_object_unbind(obj); | |
1973 | break; | |
1974 | } | |
1975 | ||
1976 | /* If we didn't get anything, but the ring is still processing | |
1977 | * things, wait for one of those things to finish and hopefully | |
1978 | * leave us a buffer to evict. | |
1979 | */ | |
1980 | if (!list_empty(&dev_priv->mm.request_list)) { | |
1981 | struct drm_i915_gem_request *request; | |
1982 | ||
1983 | request = list_first_entry(&dev_priv->mm.request_list, | |
1984 | struct drm_i915_gem_request, | |
1985 | list); | |
1986 | ||
1987 | ret = i915_wait_request(dev, request->seqno); | |
1988 | if (ret) | |
1989 | break; | |
1990 | ||
1991 | /* if waiting caused an object to become inactive, | |
1992 | * then loop around and wait for it. Otherwise, we | |
1993 | * assume that waiting freed and unbound something, | |
1994 | * so there should now be some space in the GTT | |
1995 | */ | |
1996 | if (!list_empty(&dev_priv->mm.inactive_list)) | |
1997 | continue; | |
1998 | break; | |
1999 | } | |
2000 | ||
2001 | /* If we didn't have anything on the request list but there | |
2002 | * are buffers awaiting a flush, emit one and try again. | |
2003 | * When we wait on it, those buffers waiting for that flush | |
2004 | * will get moved to inactive. | |
2005 | */ | |
2006 | if (!list_empty(&dev_priv->mm.flushing_list)) { | |
2007 | obj_priv = list_first_entry(&dev_priv->mm.flushing_list, | |
2008 | struct drm_i915_gem_object, | |
2009 | list); | |
2010 | obj = obj_priv->obj; | |
2011 | ||
2012 | i915_gem_flush(dev, | |
2013 | obj->write_domain, | |
2014 | obj->write_domain); | |
b962442e | 2015 | i915_add_request(dev, NULL, obj->write_domain); |
673a394b EA |
2016 | |
2017 | obj = NULL; | |
2018 | continue; | |
2019 | } | |
2020 | ||
2021 | DRM_ERROR("inactive empty %d request empty %d " | |
2022 | "flushing empty %d\n", | |
2023 | list_empty(&dev_priv->mm.inactive_list), | |
2024 | list_empty(&dev_priv->mm.request_list), | |
2025 | list_empty(&dev_priv->mm.flushing_list)); | |
2026 | /* If we didn't do any of the above, there's nothing to be done | |
2027 | * and we just can't fit it in. | |
2028 | */ | |
2939e1f5 | 2029 | return -ENOSPC; |
673a394b EA |
2030 | } |
2031 | return ret; | |
2032 | } | |
2033 | ||
ac94a962 KP |
2034 | static int |
2035 | i915_gem_evict_everything(struct drm_device *dev) | |
2036 | { | |
2037 | int ret; | |
2038 | ||
2039 | for (;;) { | |
2040 | ret = i915_gem_evict_something(dev); | |
2041 | if (ret != 0) | |
2042 | break; | |
2043 | } | |
2939e1f5 | 2044 | if (ret == -ENOSPC) |
15c35334 | 2045 | return 0; |
ac94a962 KP |
2046 | return ret; |
2047 | } | |
2048 | ||
6911a9b8 | 2049 | int |
856fa198 | 2050 | i915_gem_object_get_pages(struct drm_gem_object *obj) |
673a394b EA |
2051 | { |
2052 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2053 | int page_count, i; | |
2054 | struct address_space *mapping; | |
2055 | struct inode *inode; | |
2056 | struct page *page; | |
2057 | int ret; | |
2058 | ||
856fa198 | 2059 | if (obj_priv->pages_refcount++ != 0) |
673a394b EA |
2060 | return 0; |
2061 | ||
2062 | /* Get the list of pages out of our struct file. They'll be pinned | |
2063 | * at this point until we release them. | |
2064 | */ | |
2065 | page_count = obj->size / PAGE_SIZE; | |
856fa198 | 2066 | BUG_ON(obj_priv->pages != NULL); |
8e7d2b2c | 2067 | obj_priv->pages = drm_calloc_large(page_count, sizeof(struct page *)); |
856fa198 | 2068 | if (obj_priv->pages == NULL) { |
673a394b | 2069 | DRM_ERROR("Faled to allocate page list\n"); |
856fa198 | 2070 | obj_priv->pages_refcount--; |
673a394b EA |
2071 | return -ENOMEM; |
2072 | } | |
2073 | ||
2074 | inode = obj->filp->f_path.dentry->d_inode; | |
2075 | mapping = inode->i_mapping; | |
2076 | for (i = 0; i < page_count; i++) { | |
2077 | page = read_mapping_page(mapping, i, NULL); | |
2078 | if (IS_ERR(page)) { | |
2079 | ret = PTR_ERR(page); | |
2080 | DRM_ERROR("read_mapping_page failed: %d\n", ret); | |
856fa198 | 2081 | i915_gem_object_put_pages(obj); |
673a394b EA |
2082 | return ret; |
2083 | } | |
856fa198 | 2084 | obj_priv->pages[i] = page; |
673a394b | 2085 | } |
280b713b EA |
2086 | |
2087 | if (obj_priv->tiling_mode != I915_TILING_NONE) | |
2088 | i915_gem_object_do_bit_17_swizzle(obj); | |
2089 | ||
673a394b EA |
2090 | return 0; |
2091 | } | |
2092 | ||
de151cf6 JB |
2093 | static void i965_write_fence_reg(struct drm_i915_fence_reg *reg) |
2094 | { | |
2095 | struct drm_gem_object *obj = reg->obj; | |
2096 | struct drm_device *dev = obj->dev; | |
2097 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2098 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2099 | int regnum = obj_priv->fence_reg; | |
2100 | uint64_t val; | |
2101 | ||
2102 | val = (uint64_t)((obj_priv->gtt_offset + obj->size - 4096) & | |
2103 | 0xfffff000) << 32; | |
2104 | val |= obj_priv->gtt_offset & 0xfffff000; | |
2105 | val |= ((obj_priv->stride / 128) - 1) << I965_FENCE_PITCH_SHIFT; | |
2106 | if (obj_priv->tiling_mode == I915_TILING_Y) | |
2107 | val |= 1 << I965_FENCE_TILING_Y_SHIFT; | |
2108 | val |= I965_FENCE_REG_VALID; | |
2109 | ||
2110 | I915_WRITE64(FENCE_REG_965_0 + (regnum * 8), val); | |
2111 | } | |
2112 | ||
2113 | static void i915_write_fence_reg(struct drm_i915_fence_reg *reg) | |
2114 | { | |
2115 | struct drm_gem_object *obj = reg->obj; | |
2116 | struct drm_device *dev = obj->dev; | |
2117 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2118 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2119 | int regnum = obj_priv->fence_reg; | |
0f973f27 | 2120 | int tile_width; |
dc529a4f | 2121 | uint32_t fence_reg, val; |
de151cf6 JB |
2122 | uint32_t pitch_val; |
2123 | ||
2124 | if ((obj_priv->gtt_offset & ~I915_FENCE_START_MASK) || | |
2125 | (obj_priv->gtt_offset & (obj->size - 1))) { | |
f06da264 | 2126 | WARN(1, "%s: object 0x%08x not 1M or size (0x%zx) aligned\n", |
0f973f27 | 2127 | __func__, obj_priv->gtt_offset, obj->size); |
de151cf6 JB |
2128 | return; |
2129 | } | |
2130 | ||
0f973f27 JB |
2131 | if (obj_priv->tiling_mode == I915_TILING_Y && |
2132 | HAS_128_BYTE_Y_TILING(dev)) | |
2133 | tile_width = 128; | |
de151cf6 | 2134 | else |
0f973f27 JB |
2135 | tile_width = 512; |
2136 | ||
2137 | /* Note: pitch better be a power of two tile widths */ | |
2138 | pitch_val = obj_priv->stride / tile_width; | |
2139 | pitch_val = ffs(pitch_val) - 1; | |
de151cf6 JB |
2140 | |
2141 | val = obj_priv->gtt_offset; | |
2142 | if (obj_priv->tiling_mode == I915_TILING_Y) | |
2143 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
2144 | val |= I915_FENCE_SIZE_BITS(obj->size); | |
2145 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; | |
2146 | val |= I830_FENCE_REG_VALID; | |
2147 | ||
dc529a4f EA |
2148 | if (regnum < 8) |
2149 | fence_reg = FENCE_REG_830_0 + (regnum * 4); | |
2150 | else | |
2151 | fence_reg = FENCE_REG_945_8 + ((regnum - 8) * 4); | |
2152 | I915_WRITE(fence_reg, val); | |
de151cf6 JB |
2153 | } |
2154 | ||
2155 | static void i830_write_fence_reg(struct drm_i915_fence_reg *reg) | |
2156 | { | |
2157 | struct drm_gem_object *obj = reg->obj; | |
2158 | struct drm_device *dev = obj->dev; | |
2159 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2160 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2161 | int regnum = obj_priv->fence_reg; | |
2162 | uint32_t val; | |
2163 | uint32_t pitch_val; | |
8d7773a3 | 2164 | uint32_t fence_size_bits; |
de151cf6 | 2165 | |
8d7773a3 | 2166 | if ((obj_priv->gtt_offset & ~I830_FENCE_START_MASK) || |
de151cf6 | 2167 | (obj_priv->gtt_offset & (obj->size - 1))) { |
8d7773a3 | 2168 | WARN(1, "%s: object 0x%08x not 512K or size aligned\n", |
0f973f27 | 2169 | __func__, obj_priv->gtt_offset); |
de151cf6 JB |
2170 | return; |
2171 | } | |
2172 | ||
e76a16de EA |
2173 | pitch_val = obj_priv->stride / 128; |
2174 | pitch_val = ffs(pitch_val) - 1; | |
2175 | WARN_ON(pitch_val > I830_FENCE_MAX_PITCH_VAL); | |
2176 | ||
de151cf6 JB |
2177 | val = obj_priv->gtt_offset; |
2178 | if (obj_priv->tiling_mode == I915_TILING_Y) | |
2179 | val |= 1 << I830_FENCE_TILING_Y_SHIFT; | |
8d7773a3 DV |
2180 | fence_size_bits = I830_FENCE_SIZE_BITS(obj->size); |
2181 | WARN_ON(fence_size_bits & ~0x00000f00); | |
2182 | val |= fence_size_bits; | |
de151cf6 JB |
2183 | val |= pitch_val << I830_FENCE_PITCH_SHIFT; |
2184 | val |= I830_FENCE_REG_VALID; | |
2185 | ||
2186 | I915_WRITE(FENCE_REG_830_0 + (regnum * 4), val); | |
de151cf6 JB |
2187 | } |
2188 | ||
2189 | /** | |
2190 | * i915_gem_object_get_fence_reg - set up a fence reg for an object | |
2191 | * @obj: object to map through a fence reg | |
2192 | * | |
2193 | * When mapping objects through the GTT, userspace wants to be able to write | |
2194 | * to them without having to worry about swizzling if the object is tiled. | |
2195 | * | |
2196 | * This function walks the fence regs looking for a free one for @obj, | |
2197 | * stealing one if it can't find any. | |
2198 | * | |
2199 | * It then sets up the reg based on the object's properties: address, pitch | |
2200 | * and tiling format. | |
2201 | */ | |
8c4b8c3f CW |
2202 | int |
2203 | i915_gem_object_get_fence_reg(struct drm_gem_object *obj) | |
de151cf6 JB |
2204 | { |
2205 | struct drm_device *dev = obj->dev; | |
79e53945 | 2206 | struct drm_i915_private *dev_priv = dev->dev_private; |
de151cf6 JB |
2207 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
2208 | struct drm_i915_fence_reg *reg = NULL; | |
fc7170ba CW |
2209 | struct drm_i915_gem_object *old_obj_priv = NULL; |
2210 | int i, ret, avail; | |
de151cf6 JB |
2211 | |
2212 | switch (obj_priv->tiling_mode) { | |
2213 | case I915_TILING_NONE: | |
2214 | WARN(1, "allocating a fence for non-tiled object?\n"); | |
2215 | break; | |
2216 | case I915_TILING_X: | |
0f973f27 JB |
2217 | if (!obj_priv->stride) |
2218 | return -EINVAL; | |
2219 | WARN((obj_priv->stride & (512 - 1)), | |
2220 | "object 0x%08x is X tiled but has non-512B pitch\n", | |
2221 | obj_priv->gtt_offset); | |
de151cf6 JB |
2222 | break; |
2223 | case I915_TILING_Y: | |
0f973f27 JB |
2224 | if (!obj_priv->stride) |
2225 | return -EINVAL; | |
2226 | WARN((obj_priv->stride & (128 - 1)), | |
2227 | "object 0x%08x is Y tiled but has non-128B pitch\n", | |
2228 | obj_priv->gtt_offset); | |
de151cf6 JB |
2229 | break; |
2230 | } | |
2231 | ||
2232 | /* First try to find a free reg */ | |
9b2412f9 | 2233 | try_again: |
fc7170ba | 2234 | avail = 0; |
de151cf6 JB |
2235 | for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { |
2236 | reg = &dev_priv->fence_regs[i]; | |
2237 | if (!reg->obj) | |
2238 | break; | |
fc7170ba CW |
2239 | |
2240 | old_obj_priv = reg->obj->driver_private; | |
2241 | if (!old_obj_priv->pin_count) | |
2242 | avail++; | |
de151cf6 JB |
2243 | } |
2244 | ||
2245 | /* None available, try to steal one or wait for a user to finish */ | |
2246 | if (i == dev_priv->num_fence_regs) { | |
d7619c4b | 2247 | uint32_t seqno = dev_priv->mm.next_gem_seqno; |
de151cf6 | 2248 | |
fc7170ba | 2249 | if (avail == 0) |
2939e1f5 | 2250 | return -ENOSPC; |
fc7170ba | 2251 | |
de151cf6 JB |
2252 | for (i = dev_priv->fence_reg_start; |
2253 | i < dev_priv->num_fence_regs; i++) { | |
d7619c4b CW |
2254 | uint32_t this_seqno; |
2255 | ||
de151cf6 JB |
2256 | reg = &dev_priv->fence_regs[i]; |
2257 | old_obj_priv = reg->obj->driver_private; | |
d7619c4b CW |
2258 | |
2259 | if (old_obj_priv->pin_count) | |
2260 | continue; | |
2261 | ||
2262 | /* i915 uses fences for GPU access to tiled buffers */ | |
2263 | if (IS_I965G(dev) || !old_obj_priv->active) | |
de151cf6 | 2264 | break; |
d7619c4b CW |
2265 | |
2266 | /* find the seqno of the first available fence */ | |
2267 | this_seqno = old_obj_priv->last_rendering_seqno; | |
2268 | if (this_seqno != 0 && | |
2269 | reg->obj->write_domain == 0 && | |
2270 | i915_seqno_passed(seqno, this_seqno)) | |
2271 | seqno = this_seqno; | |
de151cf6 JB |
2272 | } |
2273 | ||
2274 | /* | |
2275 | * Now things get ugly... we have to wait for one of the | |
2276 | * objects to finish before trying again. | |
2277 | */ | |
2278 | if (i == dev_priv->num_fence_regs) { | |
d7619c4b CW |
2279 | if (seqno == dev_priv->mm.next_gem_seqno) { |
2280 | i915_gem_flush(dev, | |
2281 | I915_GEM_GPU_DOMAINS, | |
2282 | I915_GEM_GPU_DOMAINS); | |
b962442e | 2283 | seqno = i915_add_request(dev, NULL, |
d7619c4b CW |
2284 | I915_GEM_GPU_DOMAINS); |
2285 | if (seqno == 0) | |
2286 | return -ENOMEM; | |
de151cf6 | 2287 | } |
d7619c4b CW |
2288 | |
2289 | ret = i915_wait_request(dev, seqno); | |
2290 | if (ret) | |
2291 | return ret; | |
de151cf6 JB |
2292 | goto try_again; |
2293 | } | |
2294 | ||
2295 | /* | |
2296 | * Zap this virtual mapping so we can set up a fence again | |
2297 | * for this object next time we need it. | |
2298 | */ | |
901782b2 | 2299 | i915_gem_release_mmap(reg->obj); |
de151cf6 JB |
2300 | old_obj_priv->fence_reg = I915_FENCE_REG_NONE; |
2301 | } | |
2302 | ||
2303 | obj_priv->fence_reg = i; | |
2304 | reg->obj = obj; | |
2305 | ||
2306 | if (IS_I965G(dev)) | |
2307 | i965_write_fence_reg(reg); | |
2308 | else if (IS_I9XX(dev)) | |
2309 | i915_write_fence_reg(reg); | |
2310 | else | |
2311 | i830_write_fence_reg(reg); | |
d9ddcb96 EA |
2312 | |
2313 | return 0; | |
de151cf6 JB |
2314 | } |
2315 | ||
2316 | /** | |
2317 | * i915_gem_clear_fence_reg - clear out fence register info | |
2318 | * @obj: object to clear | |
2319 | * | |
2320 | * Zeroes out the fence register itself and clears out the associated | |
2321 | * data structures in dev_priv and obj_priv. | |
2322 | */ | |
2323 | static void | |
2324 | i915_gem_clear_fence_reg(struct drm_gem_object *obj) | |
2325 | { | |
2326 | struct drm_device *dev = obj->dev; | |
79e53945 | 2327 | drm_i915_private_t *dev_priv = dev->dev_private; |
de151cf6 JB |
2328 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
2329 | ||
2330 | if (IS_I965G(dev)) | |
2331 | I915_WRITE64(FENCE_REG_965_0 + (obj_priv->fence_reg * 8), 0); | |
dc529a4f EA |
2332 | else { |
2333 | uint32_t fence_reg; | |
2334 | ||
2335 | if (obj_priv->fence_reg < 8) | |
2336 | fence_reg = FENCE_REG_830_0 + obj_priv->fence_reg * 4; | |
2337 | else | |
2338 | fence_reg = FENCE_REG_945_8 + (obj_priv->fence_reg - | |
2339 | 8) * 4; | |
2340 | ||
2341 | I915_WRITE(fence_reg, 0); | |
2342 | } | |
de151cf6 JB |
2343 | |
2344 | dev_priv->fence_regs[obj_priv->fence_reg].obj = NULL; | |
2345 | obj_priv->fence_reg = I915_FENCE_REG_NONE; | |
2346 | } | |
2347 | ||
52dc7d32 CW |
2348 | /** |
2349 | * i915_gem_object_put_fence_reg - waits on outstanding fenced access | |
2350 | * to the buffer to finish, and then resets the fence register. | |
2351 | * @obj: tiled object holding a fence register. | |
2352 | * | |
2353 | * Zeroes out the fence register itself and clears out the associated | |
2354 | * data structures in dev_priv and obj_priv. | |
2355 | */ | |
2356 | int | |
2357 | i915_gem_object_put_fence_reg(struct drm_gem_object *obj) | |
2358 | { | |
2359 | struct drm_device *dev = obj->dev; | |
2360 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2361 | ||
2362 | if (obj_priv->fence_reg == I915_FENCE_REG_NONE) | |
2363 | return 0; | |
2364 | ||
2365 | /* On the i915, GPU access to tiled buffers is via a fence, | |
2366 | * therefore we must wait for any outstanding access to complete | |
2367 | * before clearing the fence. | |
2368 | */ | |
2369 | if (!IS_I965G(dev)) { | |
2370 | int ret; | |
2371 | ||
2372 | i915_gem_object_flush_gpu_write_domain(obj); | |
2373 | i915_gem_object_flush_gtt_write_domain(obj); | |
2374 | ret = i915_gem_object_wait_rendering(obj); | |
2375 | if (ret != 0) | |
2376 | return ret; | |
2377 | } | |
2378 | ||
2379 | i915_gem_clear_fence_reg (obj); | |
2380 | ||
2381 | return 0; | |
2382 | } | |
2383 | ||
673a394b EA |
2384 | /** |
2385 | * Finds free space in the GTT aperture and binds the object there. | |
2386 | */ | |
2387 | static int | |
2388 | i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment) | |
2389 | { | |
2390 | struct drm_device *dev = obj->dev; | |
2391 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2392 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2393 | struct drm_mm_node *free_space; | |
2394 | int page_count, ret; | |
2395 | ||
9bb2d6f9 EA |
2396 | if (dev_priv->mm.suspended) |
2397 | return -EBUSY; | |
673a394b | 2398 | if (alignment == 0) |
0f973f27 | 2399 | alignment = i915_gem_get_gtt_alignment(obj); |
8d7773a3 | 2400 | if (alignment & (i915_gem_get_gtt_alignment(obj) - 1)) { |
673a394b EA |
2401 | DRM_ERROR("Invalid object alignment requested %u\n", alignment); |
2402 | return -EINVAL; | |
2403 | } | |
2404 | ||
2405 | search_free: | |
2406 | free_space = drm_mm_search_free(&dev_priv->mm.gtt_space, | |
2407 | obj->size, alignment, 0); | |
2408 | if (free_space != NULL) { | |
2409 | obj_priv->gtt_space = drm_mm_get_block(free_space, obj->size, | |
2410 | alignment); | |
2411 | if (obj_priv->gtt_space != NULL) { | |
2412 | obj_priv->gtt_space->private = obj; | |
2413 | obj_priv->gtt_offset = obj_priv->gtt_space->start; | |
2414 | } | |
2415 | } | |
2416 | if (obj_priv->gtt_space == NULL) { | |
5e118f41 CW |
2417 | bool lists_empty; |
2418 | ||
673a394b EA |
2419 | /* If the gtt is empty and we're still having trouble |
2420 | * fitting our object in, we're out of memory. | |
2421 | */ | |
2422 | #if WATCH_LRU | |
2423 | DRM_INFO("%s: GTT full, evicting something\n", __func__); | |
2424 | #endif | |
5e118f41 CW |
2425 | spin_lock(&dev_priv->mm.active_list_lock); |
2426 | lists_empty = (list_empty(&dev_priv->mm.inactive_list) && | |
2427 | list_empty(&dev_priv->mm.flushing_list) && | |
2428 | list_empty(&dev_priv->mm.active_list)); | |
2429 | spin_unlock(&dev_priv->mm.active_list_lock); | |
2430 | if (lists_empty) { | |
673a394b | 2431 | DRM_ERROR("GTT full, but LRU list empty\n"); |
2939e1f5 | 2432 | return -ENOSPC; |
673a394b EA |
2433 | } |
2434 | ||
2435 | ret = i915_gem_evict_something(dev); | |
2436 | if (ret != 0) { | |
ac94a962 KP |
2437 | if (ret != -ERESTARTSYS) |
2438 | DRM_ERROR("Failed to evict a buffer %d\n", ret); | |
673a394b EA |
2439 | return ret; |
2440 | } | |
2441 | goto search_free; | |
2442 | } | |
2443 | ||
2444 | #if WATCH_BUF | |
cfd43c02 | 2445 | DRM_INFO("Binding object of size %zd at 0x%08x\n", |
673a394b EA |
2446 | obj->size, obj_priv->gtt_offset); |
2447 | #endif | |
856fa198 | 2448 | ret = i915_gem_object_get_pages(obj); |
673a394b EA |
2449 | if (ret) { |
2450 | drm_mm_put_block(obj_priv->gtt_space); | |
2451 | obj_priv->gtt_space = NULL; | |
2452 | return ret; | |
2453 | } | |
2454 | ||
2455 | page_count = obj->size / PAGE_SIZE; | |
2456 | /* Create an AGP memory structure pointing at our pages, and bind it | |
2457 | * into the GTT. | |
2458 | */ | |
2459 | obj_priv->agp_mem = drm_agp_bind_pages(dev, | |
856fa198 | 2460 | obj_priv->pages, |
673a394b | 2461 | page_count, |
ba1eb1d8 KP |
2462 | obj_priv->gtt_offset, |
2463 | obj_priv->agp_type); | |
673a394b | 2464 | if (obj_priv->agp_mem == NULL) { |
856fa198 | 2465 | i915_gem_object_put_pages(obj); |
673a394b EA |
2466 | drm_mm_put_block(obj_priv->gtt_space); |
2467 | obj_priv->gtt_space = NULL; | |
2468 | return -ENOMEM; | |
2469 | } | |
2470 | atomic_inc(&dev->gtt_count); | |
2471 | atomic_add(obj->size, &dev->gtt_memory); | |
2472 | ||
2473 | /* Assert that the object is not currently in any GPU domain. As it | |
2474 | * wasn't in the GTT, there shouldn't be any way it could have been in | |
2475 | * a GPU cache | |
2476 | */ | |
21d509e3 CW |
2477 | BUG_ON(obj->read_domains & I915_GEM_GPU_DOMAINS); |
2478 | BUG_ON(obj->write_domain & I915_GEM_GPU_DOMAINS); | |
673a394b EA |
2479 | |
2480 | return 0; | |
2481 | } | |
2482 | ||
2483 | void | |
2484 | i915_gem_clflush_object(struct drm_gem_object *obj) | |
2485 | { | |
2486 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2487 | ||
2488 | /* If we don't have a page list set up, then we're not pinned | |
2489 | * to GPU, and we can ignore the cache flush because it'll happen | |
2490 | * again at bind time. | |
2491 | */ | |
856fa198 | 2492 | if (obj_priv->pages == NULL) |
673a394b EA |
2493 | return; |
2494 | ||
cfa16a0d EA |
2495 | /* XXX: The 865 in particular appears to be weird in how it handles |
2496 | * cache flushing. We haven't figured it out, but the | |
2497 | * clflush+agp_chipset_flush doesn't appear to successfully get the | |
2498 | * data visible to the PGU, while wbinvd + agp_chipset_flush does. | |
2499 | */ | |
2500 | if (IS_I865G(obj->dev)) { | |
2501 | wbinvd(); | |
2502 | return; | |
2503 | } | |
2504 | ||
856fa198 | 2505 | drm_clflush_pages(obj_priv->pages, obj->size / PAGE_SIZE); |
673a394b EA |
2506 | } |
2507 | ||
e47c68e9 EA |
2508 | /** Flushes any GPU write domain for the object if it's dirty. */ |
2509 | static void | |
2510 | i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj) | |
2511 | { | |
2512 | struct drm_device *dev = obj->dev; | |
2513 | uint32_t seqno; | |
2514 | ||
2515 | if ((obj->write_domain & I915_GEM_GPU_DOMAINS) == 0) | |
2516 | return; | |
2517 | ||
2518 | /* Queue the GPU write cache flushing we need. */ | |
2519 | i915_gem_flush(dev, 0, obj->write_domain); | |
b962442e | 2520 | seqno = i915_add_request(dev, NULL, obj->write_domain); |
e47c68e9 EA |
2521 | obj->write_domain = 0; |
2522 | i915_gem_object_move_to_active(obj, seqno); | |
2523 | } | |
2524 | ||
2525 | /** Flushes the GTT write domain for the object if it's dirty. */ | |
2526 | static void | |
2527 | i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj) | |
2528 | { | |
2529 | if (obj->write_domain != I915_GEM_DOMAIN_GTT) | |
2530 | return; | |
2531 | ||
2532 | /* No actual flushing is required for the GTT write domain. Writes | |
2533 | * to it immediately go to main memory as far as we know, so there's | |
2534 | * no chipset flush. It also doesn't land in render cache. | |
2535 | */ | |
2536 | obj->write_domain = 0; | |
2537 | } | |
2538 | ||
2539 | /** Flushes the CPU write domain for the object if it's dirty. */ | |
2540 | static void | |
2541 | i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj) | |
2542 | { | |
2543 | struct drm_device *dev = obj->dev; | |
2544 | ||
2545 | if (obj->write_domain != I915_GEM_DOMAIN_CPU) | |
2546 | return; | |
2547 | ||
2548 | i915_gem_clflush_object(obj); | |
2549 | drm_agp_chipset_flush(dev); | |
2550 | obj->write_domain = 0; | |
2551 | } | |
2552 | ||
2ef7eeaa EA |
2553 | /** |
2554 | * Moves a single object to the GTT read, and possibly write domain. | |
2555 | * | |
2556 | * This function returns when the move is complete, including waiting on | |
2557 | * flushes to occur. | |
2558 | */ | |
79e53945 | 2559 | int |
2ef7eeaa EA |
2560 | i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj, int write) |
2561 | { | |
2ef7eeaa | 2562 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
e47c68e9 | 2563 | int ret; |
2ef7eeaa | 2564 | |
02354392 EA |
2565 | /* Not valid to be called on unbound objects. */ |
2566 | if (obj_priv->gtt_space == NULL) | |
2567 | return -EINVAL; | |
2568 | ||
e47c68e9 EA |
2569 | i915_gem_object_flush_gpu_write_domain(obj); |
2570 | /* Wait on any GPU rendering and flushing to occur. */ | |
2571 | ret = i915_gem_object_wait_rendering(obj); | |
2572 | if (ret != 0) | |
2573 | return ret; | |
2574 | ||
2575 | /* If we're writing through the GTT domain, then CPU and GPU caches | |
2576 | * will need to be invalidated at next use. | |
2ef7eeaa | 2577 | */ |
e47c68e9 EA |
2578 | if (write) |
2579 | obj->read_domains &= I915_GEM_DOMAIN_GTT; | |
2ef7eeaa | 2580 | |
e47c68e9 | 2581 | i915_gem_object_flush_cpu_write_domain(obj); |
2ef7eeaa | 2582 | |
e47c68e9 EA |
2583 | /* It should now be out of any other write domains, and we can update |
2584 | * the domain values for our changes. | |
2585 | */ | |
2586 | BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_GTT) != 0); | |
2587 | obj->read_domains |= I915_GEM_DOMAIN_GTT; | |
2588 | if (write) { | |
2589 | obj->write_domain = I915_GEM_DOMAIN_GTT; | |
2590 | obj_priv->dirty = 1; | |
2ef7eeaa EA |
2591 | } |
2592 | ||
e47c68e9 EA |
2593 | return 0; |
2594 | } | |
2595 | ||
2596 | /** | |
2597 | * Moves a single object to the CPU read, and possibly write domain. | |
2598 | * | |
2599 | * This function returns when the move is complete, including waiting on | |
2600 | * flushes to occur. | |
2601 | */ | |
2602 | static int | |
2603 | i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, int write) | |
2604 | { | |
e47c68e9 EA |
2605 | int ret; |
2606 | ||
2607 | i915_gem_object_flush_gpu_write_domain(obj); | |
2ef7eeaa | 2608 | /* Wait on any GPU rendering and flushing to occur. */ |
e47c68e9 EA |
2609 | ret = i915_gem_object_wait_rendering(obj); |
2610 | if (ret != 0) | |
2611 | return ret; | |
2ef7eeaa | 2612 | |
e47c68e9 | 2613 | i915_gem_object_flush_gtt_write_domain(obj); |
2ef7eeaa | 2614 | |
e47c68e9 EA |
2615 | /* If we have a partially-valid cache of the object in the CPU, |
2616 | * finish invalidating it and free the per-page flags. | |
2ef7eeaa | 2617 | */ |
e47c68e9 | 2618 | i915_gem_object_set_to_full_cpu_read_domain(obj); |
2ef7eeaa | 2619 | |
e47c68e9 EA |
2620 | /* Flush the CPU cache if it's still invalid. */ |
2621 | if ((obj->read_domains & I915_GEM_DOMAIN_CPU) == 0) { | |
2ef7eeaa | 2622 | i915_gem_clflush_object(obj); |
2ef7eeaa | 2623 | |
e47c68e9 | 2624 | obj->read_domains |= I915_GEM_DOMAIN_CPU; |
2ef7eeaa EA |
2625 | } |
2626 | ||
2627 | /* It should now be out of any other write domains, and we can update | |
2628 | * the domain values for our changes. | |
2629 | */ | |
e47c68e9 EA |
2630 | BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_CPU) != 0); |
2631 | ||
2632 | /* If we're writing through the CPU, then the GPU read domains will | |
2633 | * need to be invalidated at next use. | |
2634 | */ | |
2635 | if (write) { | |
2636 | obj->read_domains &= I915_GEM_DOMAIN_CPU; | |
2637 | obj->write_domain = I915_GEM_DOMAIN_CPU; | |
2638 | } | |
2ef7eeaa EA |
2639 | |
2640 | return 0; | |
2641 | } | |
2642 | ||
673a394b EA |
2643 | /* |
2644 | * Set the next domain for the specified object. This | |
2645 | * may not actually perform the necessary flushing/invaliding though, | |
2646 | * as that may want to be batched with other set_domain operations | |
2647 | * | |
2648 | * This is (we hope) the only really tricky part of gem. The goal | |
2649 | * is fairly simple -- track which caches hold bits of the object | |
2650 | * and make sure they remain coherent. A few concrete examples may | |
2651 | * help to explain how it works. For shorthand, we use the notation | |
2652 | * (read_domains, write_domain), e.g. (CPU, CPU) to indicate the | |
2653 | * a pair of read and write domain masks. | |
2654 | * | |
2655 | * Case 1: the batch buffer | |
2656 | * | |
2657 | * 1. Allocated | |
2658 | * 2. Written by CPU | |
2659 | * 3. Mapped to GTT | |
2660 | * 4. Read by GPU | |
2661 | * 5. Unmapped from GTT | |
2662 | * 6. Freed | |
2663 | * | |
2664 | * Let's take these a step at a time | |
2665 | * | |
2666 | * 1. Allocated | |
2667 | * Pages allocated from the kernel may still have | |
2668 | * cache contents, so we set them to (CPU, CPU) always. | |
2669 | * 2. Written by CPU (using pwrite) | |
2670 | * The pwrite function calls set_domain (CPU, CPU) and | |
2671 | * this function does nothing (as nothing changes) | |
2672 | * 3. Mapped by GTT | |
2673 | * This function asserts that the object is not | |
2674 | * currently in any GPU-based read or write domains | |
2675 | * 4. Read by GPU | |
2676 | * i915_gem_execbuffer calls set_domain (COMMAND, 0). | |
2677 | * As write_domain is zero, this function adds in the | |
2678 | * current read domains (CPU+COMMAND, 0). | |
2679 | * flush_domains is set to CPU. | |
2680 | * invalidate_domains is set to COMMAND | |
2681 | * clflush is run to get data out of the CPU caches | |
2682 | * then i915_dev_set_domain calls i915_gem_flush to | |
2683 | * emit an MI_FLUSH and drm_agp_chipset_flush | |
2684 | * 5. Unmapped from GTT | |
2685 | * i915_gem_object_unbind calls set_domain (CPU, CPU) | |
2686 | * flush_domains and invalidate_domains end up both zero | |
2687 | * so no flushing/invalidating happens | |
2688 | * 6. Freed | |
2689 | * yay, done | |
2690 | * | |
2691 | * Case 2: The shared render buffer | |
2692 | * | |
2693 | * 1. Allocated | |
2694 | * 2. Mapped to GTT | |
2695 | * 3. Read/written by GPU | |
2696 | * 4. set_domain to (CPU,CPU) | |
2697 | * 5. Read/written by CPU | |
2698 | * 6. Read/written by GPU | |
2699 | * | |
2700 | * 1. Allocated | |
2701 | * Same as last example, (CPU, CPU) | |
2702 | * 2. Mapped to GTT | |
2703 | * Nothing changes (assertions find that it is not in the GPU) | |
2704 | * 3. Read/written by GPU | |
2705 | * execbuffer calls set_domain (RENDER, RENDER) | |
2706 | * flush_domains gets CPU | |
2707 | * invalidate_domains gets GPU | |
2708 | * clflush (obj) | |
2709 | * MI_FLUSH and drm_agp_chipset_flush | |
2710 | * 4. set_domain (CPU, CPU) | |
2711 | * flush_domains gets GPU | |
2712 | * invalidate_domains gets CPU | |
2713 | * wait_rendering (obj) to make sure all drawing is complete. | |
2714 | * This will include an MI_FLUSH to get the data from GPU | |
2715 | * to memory | |
2716 | * clflush (obj) to invalidate the CPU cache | |
2717 | * Another MI_FLUSH in i915_gem_flush (eliminate this somehow?) | |
2718 | * 5. Read/written by CPU | |
2719 | * cache lines are loaded and dirtied | |
2720 | * 6. Read written by GPU | |
2721 | * Same as last GPU access | |
2722 | * | |
2723 | * Case 3: The constant buffer | |
2724 | * | |
2725 | * 1. Allocated | |
2726 | * 2. Written by CPU | |
2727 | * 3. Read by GPU | |
2728 | * 4. Updated (written) by CPU again | |
2729 | * 5. Read by GPU | |
2730 | * | |
2731 | * 1. Allocated | |
2732 | * (CPU, CPU) | |
2733 | * 2. Written by CPU | |
2734 | * (CPU, CPU) | |
2735 | * 3. Read by GPU | |
2736 | * (CPU+RENDER, 0) | |
2737 | * flush_domains = CPU | |
2738 | * invalidate_domains = RENDER | |
2739 | * clflush (obj) | |
2740 | * MI_FLUSH | |
2741 | * drm_agp_chipset_flush | |
2742 | * 4. Updated (written) by CPU again | |
2743 | * (CPU, CPU) | |
2744 | * flush_domains = 0 (no previous write domain) | |
2745 | * invalidate_domains = 0 (no new read domains) | |
2746 | * 5. Read by GPU | |
2747 | * (CPU+RENDER, 0) | |
2748 | * flush_domains = CPU | |
2749 | * invalidate_domains = RENDER | |
2750 | * clflush (obj) | |
2751 | * MI_FLUSH | |
2752 | * drm_agp_chipset_flush | |
2753 | */ | |
c0d90829 | 2754 | static void |
8b0e378a | 2755 | i915_gem_object_set_to_gpu_domain(struct drm_gem_object *obj) |
673a394b EA |
2756 | { |
2757 | struct drm_device *dev = obj->dev; | |
2758 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2759 | uint32_t invalidate_domains = 0; | |
2760 | uint32_t flush_domains = 0; | |
e47c68e9 | 2761 | |
8b0e378a EA |
2762 | BUG_ON(obj->pending_read_domains & I915_GEM_DOMAIN_CPU); |
2763 | BUG_ON(obj->pending_write_domain == I915_GEM_DOMAIN_CPU); | |
673a394b EA |
2764 | |
2765 | #if WATCH_BUF | |
2766 | DRM_INFO("%s: object %p read %08x -> %08x write %08x -> %08x\n", | |
2767 | __func__, obj, | |
8b0e378a EA |
2768 | obj->read_domains, obj->pending_read_domains, |
2769 | obj->write_domain, obj->pending_write_domain); | |
673a394b EA |
2770 | #endif |
2771 | /* | |
2772 | * If the object isn't moving to a new write domain, | |
2773 | * let the object stay in multiple read domains | |
2774 | */ | |
8b0e378a EA |
2775 | if (obj->pending_write_domain == 0) |
2776 | obj->pending_read_domains |= obj->read_domains; | |
673a394b EA |
2777 | else |
2778 | obj_priv->dirty = 1; | |
2779 | ||
2780 | /* | |
2781 | * Flush the current write domain if | |
2782 | * the new read domains don't match. Invalidate | |
2783 | * any read domains which differ from the old | |
2784 | * write domain | |
2785 | */ | |
8b0e378a EA |
2786 | if (obj->write_domain && |
2787 | obj->write_domain != obj->pending_read_domains) { | |
673a394b | 2788 | flush_domains |= obj->write_domain; |
8b0e378a EA |
2789 | invalidate_domains |= |
2790 | obj->pending_read_domains & ~obj->write_domain; | |
673a394b EA |
2791 | } |
2792 | /* | |
2793 | * Invalidate any read caches which may have | |
2794 | * stale data. That is, any new read domains. | |
2795 | */ | |
8b0e378a | 2796 | invalidate_domains |= obj->pending_read_domains & ~obj->read_domains; |
673a394b EA |
2797 | if ((flush_domains | invalidate_domains) & I915_GEM_DOMAIN_CPU) { |
2798 | #if WATCH_BUF | |
2799 | DRM_INFO("%s: CPU domain flush %08x invalidate %08x\n", | |
2800 | __func__, flush_domains, invalidate_domains); | |
2801 | #endif | |
673a394b EA |
2802 | i915_gem_clflush_object(obj); |
2803 | } | |
2804 | ||
efbeed96 EA |
2805 | /* The actual obj->write_domain will be updated with |
2806 | * pending_write_domain after we emit the accumulated flush for all | |
2807 | * of our domain changes in execbuffers (which clears objects' | |
2808 | * write_domains). So if we have a current write domain that we | |
2809 | * aren't changing, set pending_write_domain to that. | |
2810 | */ | |
2811 | if (flush_domains == 0 && obj->pending_write_domain == 0) | |
2812 | obj->pending_write_domain = obj->write_domain; | |
8b0e378a | 2813 | obj->read_domains = obj->pending_read_domains; |
673a394b EA |
2814 | |
2815 | dev->invalidate_domains |= invalidate_domains; | |
2816 | dev->flush_domains |= flush_domains; | |
2817 | #if WATCH_BUF | |
2818 | DRM_INFO("%s: read %08x write %08x invalidate %08x flush %08x\n", | |
2819 | __func__, | |
2820 | obj->read_domains, obj->write_domain, | |
2821 | dev->invalidate_domains, dev->flush_domains); | |
2822 | #endif | |
673a394b EA |
2823 | } |
2824 | ||
2825 | /** | |
e47c68e9 | 2826 | * Moves the object from a partially CPU read to a full one. |
673a394b | 2827 | * |
e47c68e9 EA |
2828 | * Note that this only resolves i915_gem_object_set_cpu_read_domain_range(), |
2829 | * and doesn't handle transitioning from !(read_domains & I915_GEM_DOMAIN_CPU). | |
673a394b | 2830 | */ |
e47c68e9 EA |
2831 | static void |
2832 | i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object *obj) | |
673a394b EA |
2833 | { |
2834 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
673a394b | 2835 | |
e47c68e9 EA |
2836 | if (!obj_priv->page_cpu_valid) |
2837 | return; | |
2838 | ||
2839 | /* If we're partially in the CPU read domain, finish moving it in. | |
2840 | */ | |
2841 | if (obj->read_domains & I915_GEM_DOMAIN_CPU) { | |
2842 | int i; | |
2843 | ||
2844 | for (i = 0; i <= (obj->size - 1) / PAGE_SIZE; i++) { | |
2845 | if (obj_priv->page_cpu_valid[i]) | |
2846 | continue; | |
856fa198 | 2847 | drm_clflush_pages(obj_priv->pages + i, 1); |
e47c68e9 | 2848 | } |
e47c68e9 EA |
2849 | } |
2850 | ||
2851 | /* Free the page_cpu_valid mappings which are now stale, whether | |
2852 | * or not we've got I915_GEM_DOMAIN_CPU. | |
2853 | */ | |
9a298b2a | 2854 | kfree(obj_priv->page_cpu_valid); |
e47c68e9 EA |
2855 | obj_priv->page_cpu_valid = NULL; |
2856 | } | |
2857 | ||
2858 | /** | |
2859 | * Set the CPU read domain on a range of the object. | |
2860 | * | |
2861 | * The object ends up with I915_GEM_DOMAIN_CPU in its read flags although it's | |
2862 | * not entirely valid. The page_cpu_valid member of the object flags which | |
2863 | * pages have been flushed, and will be respected by | |
2864 | * i915_gem_object_set_to_cpu_domain() if it's called on to get a valid mapping | |
2865 | * of the whole object. | |
2866 | * | |
2867 | * This function returns when the move is complete, including waiting on | |
2868 | * flushes to occur. | |
2869 | */ | |
2870 | static int | |
2871 | i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj, | |
2872 | uint64_t offset, uint64_t size) | |
2873 | { | |
2874 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2875 | int i, ret; | |
673a394b | 2876 | |
e47c68e9 EA |
2877 | if (offset == 0 && size == obj->size) |
2878 | return i915_gem_object_set_to_cpu_domain(obj, 0); | |
673a394b | 2879 | |
e47c68e9 EA |
2880 | i915_gem_object_flush_gpu_write_domain(obj); |
2881 | /* Wait on any GPU rendering and flushing to occur. */ | |
6a47baa6 | 2882 | ret = i915_gem_object_wait_rendering(obj); |
e47c68e9 | 2883 | if (ret != 0) |
6a47baa6 | 2884 | return ret; |
e47c68e9 EA |
2885 | i915_gem_object_flush_gtt_write_domain(obj); |
2886 | ||
2887 | /* If we're already fully in the CPU read domain, we're done. */ | |
2888 | if (obj_priv->page_cpu_valid == NULL && | |
2889 | (obj->read_domains & I915_GEM_DOMAIN_CPU) != 0) | |
2890 | return 0; | |
673a394b | 2891 | |
e47c68e9 EA |
2892 | /* Otherwise, create/clear the per-page CPU read domain flag if we're |
2893 | * newly adding I915_GEM_DOMAIN_CPU | |
2894 | */ | |
673a394b | 2895 | if (obj_priv->page_cpu_valid == NULL) { |
9a298b2a EA |
2896 | obj_priv->page_cpu_valid = kzalloc(obj->size / PAGE_SIZE, |
2897 | GFP_KERNEL); | |
e47c68e9 EA |
2898 | if (obj_priv->page_cpu_valid == NULL) |
2899 | return -ENOMEM; | |
2900 | } else if ((obj->read_domains & I915_GEM_DOMAIN_CPU) == 0) | |
2901 | memset(obj_priv->page_cpu_valid, 0, obj->size / PAGE_SIZE); | |
673a394b EA |
2902 | |
2903 | /* Flush the cache on any pages that are still invalid from the CPU's | |
2904 | * perspective. | |
2905 | */ | |
e47c68e9 EA |
2906 | for (i = offset / PAGE_SIZE; i <= (offset + size - 1) / PAGE_SIZE; |
2907 | i++) { | |
673a394b EA |
2908 | if (obj_priv->page_cpu_valid[i]) |
2909 | continue; | |
2910 | ||
856fa198 | 2911 | drm_clflush_pages(obj_priv->pages + i, 1); |
673a394b EA |
2912 | |
2913 | obj_priv->page_cpu_valid[i] = 1; | |
2914 | } | |
2915 | ||
e47c68e9 EA |
2916 | /* It should now be out of any other write domains, and we can update |
2917 | * the domain values for our changes. | |
2918 | */ | |
2919 | BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_CPU) != 0); | |
2920 | ||
2921 | obj->read_domains |= I915_GEM_DOMAIN_CPU; | |
2922 | ||
673a394b EA |
2923 | return 0; |
2924 | } | |
2925 | ||
673a394b EA |
2926 | /** |
2927 | * Pin an object to the GTT and evaluate the relocations landing in it. | |
2928 | */ | |
2929 | static int | |
2930 | i915_gem_object_pin_and_relocate(struct drm_gem_object *obj, | |
2931 | struct drm_file *file_priv, | |
40a5f0de EA |
2932 | struct drm_i915_gem_exec_object *entry, |
2933 | struct drm_i915_gem_relocation_entry *relocs) | |
673a394b EA |
2934 | { |
2935 | struct drm_device *dev = obj->dev; | |
0839ccb8 | 2936 | drm_i915_private_t *dev_priv = dev->dev_private; |
673a394b EA |
2937 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
2938 | int i, ret; | |
0839ccb8 | 2939 | void __iomem *reloc_page; |
673a394b EA |
2940 | |
2941 | /* Choose the GTT offset for our buffer and put it there. */ | |
2942 | ret = i915_gem_object_pin(obj, (uint32_t) entry->alignment); | |
2943 | if (ret) | |
2944 | return ret; | |
2945 | ||
2946 | entry->offset = obj_priv->gtt_offset; | |
2947 | ||
673a394b EA |
2948 | /* Apply the relocations, using the GTT aperture to avoid cache |
2949 | * flushing requirements. | |
2950 | */ | |
2951 | for (i = 0; i < entry->relocation_count; i++) { | |
40a5f0de | 2952 | struct drm_i915_gem_relocation_entry *reloc= &relocs[i]; |
673a394b EA |
2953 | struct drm_gem_object *target_obj; |
2954 | struct drm_i915_gem_object *target_obj_priv; | |
3043c60c EA |
2955 | uint32_t reloc_val, reloc_offset; |
2956 | uint32_t __iomem *reloc_entry; | |
673a394b | 2957 | |
673a394b | 2958 | target_obj = drm_gem_object_lookup(obj->dev, file_priv, |
40a5f0de | 2959 | reloc->target_handle); |
673a394b EA |
2960 | if (target_obj == NULL) { |
2961 | i915_gem_object_unpin(obj); | |
2962 | return -EBADF; | |
2963 | } | |
2964 | target_obj_priv = target_obj->driver_private; | |
2965 | ||
2966 | /* The target buffer should have appeared before us in the | |
2967 | * exec_object list, so it should have a GTT space bound by now. | |
2968 | */ | |
2969 | if (target_obj_priv->gtt_space == NULL) { | |
2970 | DRM_ERROR("No GTT space found for object %d\n", | |
40a5f0de | 2971 | reloc->target_handle); |
673a394b EA |
2972 | drm_gem_object_unreference(target_obj); |
2973 | i915_gem_object_unpin(obj); | |
2974 | return -EINVAL; | |
2975 | } | |
2976 | ||
40a5f0de | 2977 | if (reloc->offset > obj->size - 4) { |
673a394b EA |
2978 | DRM_ERROR("Relocation beyond object bounds: " |
2979 | "obj %p target %d offset %d size %d.\n", | |
40a5f0de EA |
2980 | obj, reloc->target_handle, |
2981 | (int) reloc->offset, (int) obj->size); | |
673a394b EA |
2982 | drm_gem_object_unreference(target_obj); |
2983 | i915_gem_object_unpin(obj); | |
2984 | return -EINVAL; | |
2985 | } | |
40a5f0de | 2986 | if (reloc->offset & 3) { |
673a394b EA |
2987 | DRM_ERROR("Relocation not 4-byte aligned: " |
2988 | "obj %p target %d offset %d.\n", | |
40a5f0de EA |
2989 | obj, reloc->target_handle, |
2990 | (int) reloc->offset); | |
673a394b EA |
2991 | drm_gem_object_unreference(target_obj); |
2992 | i915_gem_object_unpin(obj); | |
2993 | return -EINVAL; | |
2994 | } | |
2995 | ||
40a5f0de EA |
2996 | if (reloc->write_domain & I915_GEM_DOMAIN_CPU || |
2997 | reloc->read_domains & I915_GEM_DOMAIN_CPU) { | |
e47c68e9 EA |
2998 | DRM_ERROR("reloc with read/write CPU domains: " |
2999 | "obj %p target %d offset %d " | |
3000 | "read %08x write %08x", | |
40a5f0de EA |
3001 | obj, reloc->target_handle, |
3002 | (int) reloc->offset, | |
3003 | reloc->read_domains, | |
3004 | reloc->write_domain); | |
491152b8 CW |
3005 | drm_gem_object_unreference(target_obj); |
3006 | i915_gem_object_unpin(obj); | |
e47c68e9 EA |
3007 | return -EINVAL; |
3008 | } | |
3009 | ||
40a5f0de EA |
3010 | if (reloc->write_domain && target_obj->pending_write_domain && |
3011 | reloc->write_domain != target_obj->pending_write_domain) { | |
673a394b EA |
3012 | DRM_ERROR("Write domain conflict: " |
3013 | "obj %p target %d offset %d " | |
3014 | "new %08x old %08x\n", | |
40a5f0de EA |
3015 | obj, reloc->target_handle, |
3016 | (int) reloc->offset, | |
3017 | reloc->write_domain, | |
673a394b EA |
3018 | target_obj->pending_write_domain); |
3019 | drm_gem_object_unreference(target_obj); | |
3020 | i915_gem_object_unpin(obj); | |
3021 | return -EINVAL; | |
3022 | } | |
3023 | ||
3024 | #if WATCH_RELOC | |
3025 | DRM_INFO("%s: obj %p offset %08x target %d " | |
3026 | "read %08x write %08x gtt %08x " | |
3027 | "presumed %08x delta %08x\n", | |
3028 | __func__, | |
3029 | obj, | |
40a5f0de EA |
3030 | (int) reloc->offset, |
3031 | (int) reloc->target_handle, | |
3032 | (int) reloc->read_domains, | |
3033 | (int) reloc->write_domain, | |
673a394b | 3034 | (int) target_obj_priv->gtt_offset, |
40a5f0de EA |
3035 | (int) reloc->presumed_offset, |
3036 | reloc->delta); | |
673a394b EA |
3037 | #endif |
3038 | ||
40a5f0de EA |
3039 | target_obj->pending_read_domains |= reloc->read_domains; |
3040 | target_obj->pending_write_domain |= reloc->write_domain; | |
673a394b EA |
3041 | |
3042 | /* If the relocation already has the right value in it, no | |
3043 | * more work needs to be done. | |
3044 | */ | |
40a5f0de | 3045 | if (target_obj_priv->gtt_offset == reloc->presumed_offset) { |
673a394b EA |
3046 | drm_gem_object_unreference(target_obj); |
3047 | continue; | |
3048 | } | |
3049 | ||
2ef7eeaa EA |
3050 | ret = i915_gem_object_set_to_gtt_domain(obj, 1); |
3051 | if (ret != 0) { | |
3052 | drm_gem_object_unreference(target_obj); | |
3053 | i915_gem_object_unpin(obj); | |
3054 | return -EINVAL; | |
673a394b EA |
3055 | } |
3056 | ||
3057 | /* Map the page containing the relocation we're going to | |
3058 | * perform. | |
3059 | */ | |
40a5f0de | 3060 | reloc_offset = obj_priv->gtt_offset + reloc->offset; |
0839ccb8 KP |
3061 | reloc_page = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping, |
3062 | (reloc_offset & | |
3063 | ~(PAGE_SIZE - 1))); | |
3043c60c | 3064 | reloc_entry = (uint32_t __iomem *)(reloc_page + |
0839ccb8 | 3065 | (reloc_offset & (PAGE_SIZE - 1))); |
40a5f0de | 3066 | reloc_val = target_obj_priv->gtt_offset + reloc->delta; |
673a394b EA |
3067 | |
3068 | #if WATCH_BUF | |
3069 | DRM_INFO("Applied relocation: %p@0x%08x %08x -> %08x\n", | |
40a5f0de | 3070 | obj, (unsigned int) reloc->offset, |
673a394b EA |
3071 | readl(reloc_entry), reloc_val); |
3072 | #endif | |
3073 | writel(reloc_val, reloc_entry); | |
0839ccb8 | 3074 | io_mapping_unmap_atomic(reloc_page); |
673a394b | 3075 | |
40a5f0de EA |
3076 | /* The updated presumed offset for this entry will be |
3077 | * copied back out to the user. | |
673a394b | 3078 | */ |
40a5f0de | 3079 | reloc->presumed_offset = target_obj_priv->gtt_offset; |
673a394b EA |
3080 | |
3081 | drm_gem_object_unreference(target_obj); | |
3082 | } | |
3083 | ||
673a394b EA |
3084 | #if WATCH_BUF |
3085 | if (0) | |
3086 | i915_gem_dump_object(obj, 128, __func__, ~0); | |
3087 | #endif | |
3088 | return 0; | |
3089 | } | |
3090 | ||
3091 | /** Dispatch a batchbuffer to the ring | |
3092 | */ | |
3093 | static int | |
3094 | i915_dispatch_gem_execbuffer(struct drm_device *dev, | |
3095 | struct drm_i915_gem_execbuffer *exec, | |
201361a5 | 3096 | struct drm_clip_rect *cliprects, |
673a394b EA |
3097 | uint64_t exec_offset) |
3098 | { | |
3099 | drm_i915_private_t *dev_priv = dev->dev_private; | |
673a394b EA |
3100 | int nbox = exec->num_cliprects; |
3101 | int i = 0, count; | |
83d60795 | 3102 | uint32_t exec_start, exec_len; |
673a394b EA |
3103 | RING_LOCALS; |
3104 | ||
3105 | exec_start = (uint32_t) exec_offset + exec->batch_start_offset; | |
3106 | exec_len = (uint32_t) exec->batch_len; | |
3107 | ||
673a394b EA |
3108 | count = nbox ? nbox : 1; |
3109 | ||
3110 | for (i = 0; i < count; i++) { | |
3111 | if (i < nbox) { | |
201361a5 | 3112 | int ret = i915_emit_box(dev, cliprects, i, |
673a394b EA |
3113 | exec->DR1, exec->DR4); |
3114 | if (ret) | |
3115 | return ret; | |
3116 | } | |
3117 | ||
3118 | if (IS_I830(dev) || IS_845G(dev)) { | |
3119 | BEGIN_LP_RING(4); | |
3120 | OUT_RING(MI_BATCH_BUFFER); | |
3121 | OUT_RING(exec_start | MI_BATCH_NON_SECURE); | |
3122 | OUT_RING(exec_start + exec_len - 4); | |
3123 | OUT_RING(0); | |
3124 | ADVANCE_LP_RING(); | |
3125 | } else { | |
3126 | BEGIN_LP_RING(2); | |
3127 | if (IS_I965G(dev)) { | |
3128 | OUT_RING(MI_BATCH_BUFFER_START | | |
3129 | (2 << 6) | | |
3130 | MI_BATCH_NON_SECURE_I965); | |
3131 | OUT_RING(exec_start); | |
3132 | } else { | |
3133 | OUT_RING(MI_BATCH_BUFFER_START | | |
3134 | (2 << 6)); | |
3135 | OUT_RING(exec_start | MI_BATCH_NON_SECURE); | |
3136 | } | |
3137 | ADVANCE_LP_RING(); | |
3138 | } | |
3139 | } | |
3140 | ||
3141 | /* XXX breadcrumb */ | |
3142 | return 0; | |
3143 | } | |
3144 | ||
3145 | /* Throttle our rendering by waiting until the ring has completed our requests | |
3146 | * emitted over 20 msec ago. | |
3147 | * | |
b962442e EA |
3148 | * Note that if we were to use the current jiffies each time around the loop, |
3149 | * we wouldn't escape the function with any frames outstanding if the time to | |
3150 | * render a frame was over 20ms. | |
3151 | * | |
673a394b EA |
3152 | * This should get us reasonable parallelism between CPU and GPU but also |
3153 | * relatively low latency when blocking on a particular request to finish. | |
3154 | */ | |
3155 | static int | |
3156 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file_priv) | |
3157 | { | |
3158 | struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv; | |
3159 | int ret = 0; | |
b962442e | 3160 | unsigned long recent_enough = jiffies - msecs_to_jiffies(20); |
673a394b EA |
3161 | |
3162 | mutex_lock(&dev->struct_mutex); | |
b962442e EA |
3163 | while (!list_empty(&i915_file_priv->mm.request_list)) { |
3164 | struct drm_i915_gem_request *request; | |
3165 | ||
3166 | request = list_first_entry(&i915_file_priv->mm.request_list, | |
3167 | struct drm_i915_gem_request, | |
3168 | client_list); | |
3169 | ||
3170 | if (time_after_eq(request->emitted_jiffies, recent_enough)) | |
3171 | break; | |
3172 | ||
3173 | ret = i915_wait_request(dev, request->seqno); | |
3174 | if (ret != 0) | |
3175 | break; | |
3176 | } | |
673a394b | 3177 | mutex_unlock(&dev->struct_mutex); |
b962442e | 3178 | |
673a394b EA |
3179 | return ret; |
3180 | } | |
3181 | ||
40a5f0de EA |
3182 | static int |
3183 | i915_gem_get_relocs_from_user(struct drm_i915_gem_exec_object *exec_list, | |
3184 | uint32_t buffer_count, | |
3185 | struct drm_i915_gem_relocation_entry **relocs) | |
3186 | { | |
3187 | uint32_t reloc_count = 0, reloc_index = 0, i; | |
3188 | int ret; | |
3189 | ||
3190 | *relocs = NULL; | |
3191 | for (i = 0; i < buffer_count; i++) { | |
3192 | if (reloc_count + exec_list[i].relocation_count < reloc_count) | |
3193 | return -EINVAL; | |
3194 | reloc_count += exec_list[i].relocation_count; | |
3195 | } | |
3196 | ||
8e7d2b2c | 3197 | *relocs = drm_calloc_large(reloc_count, sizeof(**relocs)); |
40a5f0de EA |
3198 | if (*relocs == NULL) |
3199 | return -ENOMEM; | |
3200 | ||
3201 | for (i = 0; i < buffer_count; i++) { | |
3202 | struct drm_i915_gem_relocation_entry __user *user_relocs; | |
3203 | ||
3204 | user_relocs = (void __user *)(uintptr_t)exec_list[i].relocs_ptr; | |
3205 | ||
3206 | ret = copy_from_user(&(*relocs)[reloc_index], | |
3207 | user_relocs, | |
3208 | exec_list[i].relocation_count * | |
3209 | sizeof(**relocs)); | |
3210 | if (ret != 0) { | |
8e7d2b2c | 3211 | drm_free_large(*relocs); |
40a5f0de | 3212 | *relocs = NULL; |
2bc43b5c | 3213 | return -EFAULT; |
40a5f0de EA |
3214 | } |
3215 | ||
3216 | reloc_index += exec_list[i].relocation_count; | |
3217 | } | |
3218 | ||
2bc43b5c | 3219 | return 0; |
40a5f0de EA |
3220 | } |
3221 | ||
3222 | static int | |
3223 | i915_gem_put_relocs_to_user(struct drm_i915_gem_exec_object *exec_list, | |
3224 | uint32_t buffer_count, | |
3225 | struct drm_i915_gem_relocation_entry *relocs) | |
3226 | { | |
3227 | uint32_t reloc_count = 0, i; | |
2bc43b5c | 3228 | int ret = 0; |
40a5f0de EA |
3229 | |
3230 | for (i = 0; i < buffer_count; i++) { | |
3231 | struct drm_i915_gem_relocation_entry __user *user_relocs; | |
2bc43b5c | 3232 | int unwritten; |
40a5f0de EA |
3233 | |
3234 | user_relocs = (void __user *)(uintptr_t)exec_list[i].relocs_ptr; | |
3235 | ||
2bc43b5c FM |
3236 | unwritten = copy_to_user(user_relocs, |
3237 | &relocs[reloc_count], | |
3238 | exec_list[i].relocation_count * | |
3239 | sizeof(*relocs)); | |
3240 | ||
3241 | if (unwritten) { | |
3242 | ret = -EFAULT; | |
3243 | goto err; | |
40a5f0de EA |
3244 | } |
3245 | ||
3246 | reloc_count += exec_list[i].relocation_count; | |
3247 | } | |
3248 | ||
2bc43b5c | 3249 | err: |
8e7d2b2c | 3250 | drm_free_large(relocs); |
40a5f0de EA |
3251 | |
3252 | return ret; | |
3253 | } | |
3254 | ||
83d60795 CW |
3255 | static int |
3256 | i915_gem_check_execbuffer (struct drm_i915_gem_execbuffer *exec, | |
3257 | uint64_t exec_offset) | |
3258 | { | |
3259 | uint32_t exec_start, exec_len; | |
3260 | ||
3261 | exec_start = (uint32_t) exec_offset + exec->batch_start_offset; | |
3262 | exec_len = (uint32_t) exec->batch_len; | |
3263 | ||
3264 | if ((exec_start | exec_len) & 0x7) | |
3265 | return -EINVAL; | |
3266 | ||
3267 | if (!exec_start) | |
3268 | return -EINVAL; | |
3269 | ||
3270 | return 0; | |
3271 | } | |
3272 | ||
673a394b EA |
3273 | int |
3274 | i915_gem_execbuffer(struct drm_device *dev, void *data, | |
3275 | struct drm_file *file_priv) | |
3276 | { | |
3277 | drm_i915_private_t *dev_priv = dev->dev_private; | |
673a394b EA |
3278 | struct drm_i915_gem_execbuffer *args = data; |
3279 | struct drm_i915_gem_exec_object *exec_list = NULL; | |
3280 | struct drm_gem_object **object_list = NULL; | |
3281 | struct drm_gem_object *batch_obj; | |
b70d11da | 3282 | struct drm_i915_gem_object *obj_priv; |
201361a5 | 3283 | struct drm_clip_rect *cliprects = NULL; |
40a5f0de EA |
3284 | struct drm_i915_gem_relocation_entry *relocs; |
3285 | int ret, ret2, i, pinned = 0; | |
673a394b | 3286 | uint64_t exec_offset; |
40a5f0de | 3287 | uint32_t seqno, flush_domains, reloc_index; |
ac94a962 | 3288 | int pin_tries; |
673a394b EA |
3289 | |
3290 | #if WATCH_EXEC | |
3291 | DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n", | |
3292 | (int) args->buffers_ptr, args->buffer_count, args->batch_len); | |
3293 | #endif | |
3294 | ||
4f481ed2 EA |
3295 | if (args->buffer_count < 1) { |
3296 | DRM_ERROR("execbuf with %d buffers\n", args->buffer_count); | |
3297 | return -EINVAL; | |
3298 | } | |
673a394b | 3299 | /* Copy in the exec list from userland */ |
8e7d2b2c JB |
3300 | exec_list = drm_calloc_large(sizeof(*exec_list), args->buffer_count); |
3301 | object_list = drm_calloc_large(sizeof(*object_list), args->buffer_count); | |
673a394b EA |
3302 | if (exec_list == NULL || object_list == NULL) { |
3303 | DRM_ERROR("Failed to allocate exec or object list " | |
3304 | "for %d buffers\n", | |
3305 | args->buffer_count); | |
3306 | ret = -ENOMEM; | |
3307 | goto pre_mutex_err; | |
3308 | } | |
3309 | ret = copy_from_user(exec_list, | |
3310 | (struct drm_i915_relocation_entry __user *) | |
3311 | (uintptr_t) args->buffers_ptr, | |
3312 | sizeof(*exec_list) * args->buffer_count); | |
3313 | if (ret != 0) { | |
3314 | DRM_ERROR("copy %d exec entries failed %d\n", | |
3315 | args->buffer_count, ret); | |
3316 | goto pre_mutex_err; | |
3317 | } | |
3318 | ||
201361a5 | 3319 | if (args->num_cliprects != 0) { |
9a298b2a EA |
3320 | cliprects = kcalloc(args->num_cliprects, sizeof(*cliprects), |
3321 | GFP_KERNEL); | |
201361a5 EA |
3322 | if (cliprects == NULL) |
3323 | goto pre_mutex_err; | |
3324 | ||
3325 | ret = copy_from_user(cliprects, | |
3326 | (struct drm_clip_rect __user *) | |
3327 | (uintptr_t) args->cliprects_ptr, | |
3328 | sizeof(*cliprects) * args->num_cliprects); | |
3329 | if (ret != 0) { | |
3330 | DRM_ERROR("copy %d cliprects failed: %d\n", | |
3331 | args->num_cliprects, ret); | |
3332 | goto pre_mutex_err; | |
3333 | } | |
3334 | } | |
3335 | ||
40a5f0de EA |
3336 | ret = i915_gem_get_relocs_from_user(exec_list, args->buffer_count, |
3337 | &relocs); | |
3338 | if (ret != 0) | |
3339 | goto pre_mutex_err; | |
3340 | ||
673a394b EA |
3341 | mutex_lock(&dev->struct_mutex); |
3342 | ||
3343 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3344 | ||
3345 | if (dev_priv->mm.wedged) { | |
3346 | DRM_ERROR("Execbuf while wedged\n"); | |
3347 | mutex_unlock(&dev->struct_mutex); | |
a198bc80 CW |
3348 | ret = -EIO; |
3349 | goto pre_mutex_err; | |
673a394b EA |
3350 | } |
3351 | ||
3352 | if (dev_priv->mm.suspended) { | |
3353 | DRM_ERROR("Execbuf while VT-switched.\n"); | |
3354 | mutex_unlock(&dev->struct_mutex); | |
a198bc80 CW |
3355 | ret = -EBUSY; |
3356 | goto pre_mutex_err; | |
673a394b EA |
3357 | } |
3358 | ||
ac94a962 | 3359 | /* Look up object handles */ |
673a394b EA |
3360 | for (i = 0; i < args->buffer_count; i++) { |
3361 | object_list[i] = drm_gem_object_lookup(dev, file_priv, | |
3362 | exec_list[i].handle); | |
3363 | if (object_list[i] == NULL) { | |
3364 | DRM_ERROR("Invalid object handle %d at index %d\n", | |
3365 | exec_list[i].handle, i); | |
3366 | ret = -EBADF; | |
3367 | goto err; | |
3368 | } | |
b70d11da KH |
3369 | |
3370 | obj_priv = object_list[i]->driver_private; | |
3371 | if (obj_priv->in_execbuffer) { | |
3372 | DRM_ERROR("Object %p appears more than once in object list\n", | |
3373 | object_list[i]); | |
3374 | ret = -EBADF; | |
3375 | goto err; | |
3376 | } | |
3377 | obj_priv->in_execbuffer = true; | |
ac94a962 | 3378 | } |
673a394b | 3379 | |
ac94a962 KP |
3380 | /* Pin and relocate */ |
3381 | for (pin_tries = 0; ; pin_tries++) { | |
3382 | ret = 0; | |
40a5f0de EA |
3383 | reloc_index = 0; |
3384 | ||
ac94a962 KP |
3385 | for (i = 0; i < args->buffer_count; i++) { |
3386 | object_list[i]->pending_read_domains = 0; | |
3387 | object_list[i]->pending_write_domain = 0; | |
3388 | ret = i915_gem_object_pin_and_relocate(object_list[i], | |
3389 | file_priv, | |
40a5f0de EA |
3390 | &exec_list[i], |
3391 | &relocs[reloc_index]); | |
ac94a962 KP |
3392 | if (ret) |
3393 | break; | |
3394 | pinned = i + 1; | |
40a5f0de | 3395 | reloc_index += exec_list[i].relocation_count; |
ac94a962 KP |
3396 | } |
3397 | /* success */ | |
3398 | if (ret == 0) | |
3399 | break; | |
3400 | ||
3401 | /* error other than GTT full, or we've already tried again */ | |
2939e1f5 | 3402 | if (ret != -ENOSPC || pin_tries >= 1) { |
f1acec93 EA |
3403 | if (ret != -ERESTARTSYS) |
3404 | DRM_ERROR("Failed to pin buffers %d\n", ret); | |
673a394b EA |
3405 | goto err; |
3406 | } | |
ac94a962 KP |
3407 | |
3408 | /* unpin all of our buffers */ | |
3409 | for (i = 0; i < pinned; i++) | |
3410 | i915_gem_object_unpin(object_list[i]); | |
b1177636 | 3411 | pinned = 0; |
ac94a962 KP |
3412 | |
3413 | /* evict everyone we can from the aperture */ | |
3414 | ret = i915_gem_evict_everything(dev); | |
3415 | if (ret) | |
3416 | goto err; | |
673a394b EA |
3417 | } |
3418 | ||
3419 | /* Set the pending read domains for the batch buffer to COMMAND */ | |
3420 | batch_obj = object_list[args->buffer_count-1]; | |
5f26a2c7 CW |
3421 | if (batch_obj->pending_write_domain) { |
3422 | DRM_ERROR("Attempting to use self-modifying batch buffer\n"); | |
3423 | ret = -EINVAL; | |
3424 | goto err; | |
3425 | } | |
3426 | batch_obj->pending_read_domains |= I915_GEM_DOMAIN_COMMAND; | |
673a394b | 3427 | |
83d60795 CW |
3428 | /* Sanity check the batch buffer, prior to moving objects */ |
3429 | exec_offset = exec_list[args->buffer_count - 1].offset; | |
3430 | ret = i915_gem_check_execbuffer (args, exec_offset); | |
3431 | if (ret != 0) { | |
3432 | DRM_ERROR("execbuf with invalid offset/length\n"); | |
3433 | goto err; | |
3434 | } | |
3435 | ||
673a394b EA |
3436 | i915_verify_inactive(dev, __FILE__, __LINE__); |
3437 | ||
646f0f6e KP |
3438 | /* Zero the global flush/invalidate flags. These |
3439 | * will be modified as new domains are computed | |
3440 | * for each object | |
3441 | */ | |
3442 | dev->invalidate_domains = 0; | |
3443 | dev->flush_domains = 0; | |
3444 | ||
673a394b EA |
3445 | for (i = 0; i < args->buffer_count; i++) { |
3446 | struct drm_gem_object *obj = object_list[i]; | |
673a394b | 3447 | |
646f0f6e | 3448 | /* Compute new gpu domains and update invalidate/flush */ |
8b0e378a | 3449 | i915_gem_object_set_to_gpu_domain(obj); |
673a394b EA |
3450 | } |
3451 | ||
3452 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3453 | ||
646f0f6e KP |
3454 | if (dev->invalidate_domains | dev->flush_domains) { |
3455 | #if WATCH_EXEC | |
3456 | DRM_INFO("%s: invalidate_domains %08x flush_domains %08x\n", | |
3457 | __func__, | |
3458 | dev->invalidate_domains, | |
3459 | dev->flush_domains); | |
3460 | #endif | |
3461 | i915_gem_flush(dev, | |
3462 | dev->invalidate_domains, | |
3463 | dev->flush_domains); | |
3464 | if (dev->flush_domains) | |
b962442e EA |
3465 | (void)i915_add_request(dev, file_priv, |
3466 | dev->flush_domains); | |
646f0f6e | 3467 | } |
673a394b | 3468 | |
efbeed96 EA |
3469 | for (i = 0; i < args->buffer_count; i++) { |
3470 | struct drm_gem_object *obj = object_list[i]; | |
3471 | ||
3472 | obj->write_domain = obj->pending_write_domain; | |
3473 | } | |
3474 | ||
673a394b EA |
3475 | i915_verify_inactive(dev, __FILE__, __LINE__); |
3476 | ||
3477 | #if WATCH_COHERENCY | |
3478 | for (i = 0; i < args->buffer_count; i++) { | |
3479 | i915_gem_object_check_coherency(object_list[i], | |
3480 | exec_list[i].handle); | |
3481 | } | |
3482 | #endif | |
3483 | ||
673a394b | 3484 | #if WATCH_EXEC |
6911a9b8 | 3485 | i915_gem_dump_object(batch_obj, |
673a394b EA |
3486 | args->batch_len, |
3487 | __func__, | |
3488 | ~0); | |
3489 | #endif | |
3490 | ||
673a394b | 3491 | /* Exec the batchbuffer */ |
201361a5 | 3492 | ret = i915_dispatch_gem_execbuffer(dev, args, cliprects, exec_offset); |
673a394b EA |
3493 | if (ret) { |
3494 | DRM_ERROR("dispatch failed %d\n", ret); | |
3495 | goto err; | |
3496 | } | |
3497 | ||
3498 | /* | |
3499 | * Ensure that the commands in the batch buffer are | |
3500 | * finished before the interrupt fires | |
3501 | */ | |
3502 | flush_domains = i915_retire_commands(dev); | |
3503 | ||
3504 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3505 | ||
3506 | /* | |
3507 | * Get a seqno representing the execution of the current buffer, | |
3508 | * which we can wait on. We would like to mitigate these interrupts, | |
3509 | * likely by only creating seqnos occasionally (so that we have | |
3510 | * *some* interrupts representing completion of buffers that we can | |
3511 | * wait on when trying to clear up gtt space). | |
3512 | */ | |
b962442e | 3513 | seqno = i915_add_request(dev, file_priv, flush_domains); |
673a394b | 3514 | BUG_ON(seqno == 0); |
673a394b EA |
3515 | for (i = 0; i < args->buffer_count; i++) { |
3516 | struct drm_gem_object *obj = object_list[i]; | |
673a394b | 3517 | |
ce44b0ea | 3518 | i915_gem_object_move_to_active(obj, seqno); |
673a394b EA |
3519 | #if WATCH_LRU |
3520 | DRM_INFO("%s: move to exec list %p\n", __func__, obj); | |
3521 | #endif | |
3522 | } | |
3523 | #if WATCH_LRU | |
3524 | i915_dump_lru(dev, __func__); | |
3525 | #endif | |
3526 | ||
3527 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3528 | ||
673a394b | 3529 | err: |
aad87dff JL |
3530 | for (i = 0; i < pinned; i++) |
3531 | i915_gem_object_unpin(object_list[i]); | |
3532 | ||
b70d11da KH |
3533 | for (i = 0; i < args->buffer_count; i++) { |
3534 | if (object_list[i]) { | |
3535 | obj_priv = object_list[i]->driver_private; | |
3536 | obj_priv->in_execbuffer = false; | |
3537 | } | |
aad87dff | 3538 | drm_gem_object_unreference(object_list[i]); |
b70d11da | 3539 | } |
673a394b | 3540 | |
673a394b EA |
3541 | mutex_unlock(&dev->struct_mutex); |
3542 | ||
a35f2e2b RD |
3543 | if (!ret) { |
3544 | /* Copy the new buffer offsets back to the user's exec list. */ | |
3545 | ret = copy_to_user((struct drm_i915_relocation_entry __user *) | |
3546 | (uintptr_t) args->buffers_ptr, | |
3547 | exec_list, | |
3548 | sizeof(*exec_list) * args->buffer_count); | |
2bc43b5c FM |
3549 | if (ret) { |
3550 | ret = -EFAULT; | |
a35f2e2b RD |
3551 | DRM_ERROR("failed to copy %d exec entries " |
3552 | "back to user (%d)\n", | |
3553 | args->buffer_count, ret); | |
2bc43b5c | 3554 | } |
a35f2e2b RD |
3555 | } |
3556 | ||
40a5f0de EA |
3557 | /* Copy the updated relocations out regardless of current error |
3558 | * state. Failure to update the relocs would mean that the next | |
3559 | * time userland calls execbuf, it would do so with presumed offset | |
3560 | * state that didn't match the actual object state. | |
3561 | */ | |
3562 | ret2 = i915_gem_put_relocs_to_user(exec_list, args->buffer_count, | |
3563 | relocs); | |
3564 | if (ret2 != 0) { | |
3565 | DRM_ERROR("Failed to copy relocations back out: %d\n", ret2); | |
3566 | ||
3567 | if (ret == 0) | |
3568 | ret = ret2; | |
3569 | } | |
3570 | ||
673a394b | 3571 | pre_mutex_err: |
8e7d2b2c JB |
3572 | drm_free_large(object_list); |
3573 | drm_free_large(exec_list); | |
9a298b2a | 3574 | kfree(cliprects); |
673a394b EA |
3575 | |
3576 | return ret; | |
3577 | } | |
3578 | ||
3579 | int | |
3580 | i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment) | |
3581 | { | |
3582 | struct drm_device *dev = obj->dev; | |
3583 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
3584 | int ret; | |
3585 | ||
3586 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3587 | if (obj_priv->gtt_space == NULL) { | |
3588 | ret = i915_gem_object_bind_to_gtt(obj, alignment); | |
3589 | if (ret != 0) { | |
9bb2d6f9 | 3590 | if (ret != -EBUSY && ret != -ERESTARTSYS) |
0fce81e3 | 3591 | DRM_ERROR("Failure to bind: %d\n", ret); |
673a394b EA |
3592 | return ret; |
3593 | } | |
22c344e9 CW |
3594 | } |
3595 | /* | |
3596 | * Pre-965 chips need a fence register set up in order to | |
3597 | * properly handle tiled surfaces. | |
3598 | */ | |
3599 | if (!IS_I965G(dev) && | |
3600 | obj_priv->fence_reg == I915_FENCE_REG_NONE && | |
3601 | obj_priv->tiling_mode != I915_TILING_NONE) { | |
8c4b8c3f | 3602 | ret = i915_gem_object_get_fence_reg(obj); |
22c344e9 CW |
3603 | if (ret != 0) { |
3604 | if (ret != -EBUSY && ret != -ERESTARTSYS) | |
3605 | DRM_ERROR("Failure to install fence: %d\n", | |
3606 | ret); | |
3607 | return ret; | |
3608 | } | |
673a394b EA |
3609 | } |
3610 | obj_priv->pin_count++; | |
3611 | ||
3612 | /* If the object is not active and not pending a flush, | |
3613 | * remove it from the inactive list | |
3614 | */ | |
3615 | if (obj_priv->pin_count == 1) { | |
3616 | atomic_inc(&dev->pin_count); | |
3617 | atomic_add(obj->size, &dev->pin_memory); | |
3618 | if (!obj_priv->active && | |
21d509e3 | 3619 | (obj->write_domain & I915_GEM_GPU_DOMAINS) == 0 && |
673a394b EA |
3620 | !list_empty(&obj_priv->list)) |
3621 | list_del_init(&obj_priv->list); | |
3622 | } | |
3623 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3624 | ||
3625 | return 0; | |
3626 | } | |
3627 | ||
3628 | void | |
3629 | i915_gem_object_unpin(struct drm_gem_object *obj) | |
3630 | { | |
3631 | struct drm_device *dev = obj->dev; | |
3632 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3633 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
3634 | ||
3635 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3636 | obj_priv->pin_count--; | |
3637 | BUG_ON(obj_priv->pin_count < 0); | |
3638 | BUG_ON(obj_priv->gtt_space == NULL); | |
3639 | ||
3640 | /* If the object is no longer pinned, and is | |
3641 | * neither active nor being flushed, then stick it on | |
3642 | * the inactive list | |
3643 | */ | |
3644 | if (obj_priv->pin_count == 0) { | |
3645 | if (!obj_priv->active && | |
21d509e3 | 3646 | (obj->write_domain & I915_GEM_GPU_DOMAINS) == 0) |
673a394b EA |
3647 | list_move_tail(&obj_priv->list, |
3648 | &dev_priv->mm.inactive_list); | |
3649 | atomic_dec(&dev->pin_count); | |
3650 | atomic_sub(obj->size, &dev->pin_memory); | |
3651 | } | |
3652 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
3653 | } | |
3654 | ||
3655 | int | |
3656 | i915_gem_pin_ioctl(struct drm_device *dev, void *data, | |
3657 | struct drm_file *file_priv) | |
3658 | { | |
3659 | struct drm_i915_gem_pin *args = data; | |
3660 | struct drm_gem_object *obj; | |
3661 | struct drm_i915_gem_object *obj_priv; | |
3662 | int ret; | |
3663 | ||
3664 | mutex_lock(&dev->struct_mutex); | |
3665 | ||
3666 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
3667 | if (obj == NULL) { | |
3668 | DRM_ERROR("Bad handle in i915_gem_pin_ioctl(): %d\n", | |
3669 | args->handle); | |
3670 | mutex_unlock(&dev->struct_mutex); | |
3671 | return -EBADF; | |
3672 | } | |
3673 | obj_priv = obj->driver_private; | |
3674 | ||
79e53945 JB |
3675 | if (obj_priv->pin_filp != NULL && obj_priv->pin_filp != file_priv) { |
3676 | DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n", | |
3677 | args->handle); | |
96dec61d | 3678 | drm_gem_object_unreference(obj); |
673a394b | 3679 | mutex_unlock(&dev->struct_mutex); |
79e53945 JB |
3680 | return -EINVAL; |
3681 | } | |
3682 | ||
3683 | obj_priv->user_pin_count++; | |
3684 | obj_priv->pin_filp = file_priv; | |
3685 | if (obj_priv->user_pin_count == 1) { | |
3686 | ret = i915_gem_object_pin(obj, args->alignment); | |
3687 | if (ret != 0) { | |
3688 | drm_gem_object_unreference(obj); | |
3689 | mutex_unlock(&dev->struct_mutex); | |
3690 | return ret; | |
3691 | } | |
673a394b EA |
3692 | } |
3693 | ||
3694 | /* XXX - flush the CPU caches for pinned objects | |
3695 | * as the X server doesn't manage domains yet | |
3696 | */ | |
e47c68e9 | 3697 | i915_gem_object_flush_cpu_write_domain(obj); |
673a394b EA |
3698 | args->offset = obj_priv->gtt_offset; |
3699 | drm_gem_object_unreference(obj); | |
3700 | mutex_unlock(&dev->struct_mutex); | |
3701 | ||
3702 | return 0; | |
3703 | } | |
3704 | ||
3705 | int | |
3706 | i915_gem_unpin_ioctl(struct drm_device *dev, void *data, | |
3707 | struct drm_file *file_priv) | |
3708 | { | |
3709 | struct drm_i915_gem_pin *args = data; | |
3710 | struct drm_gem_object *obj; | |
79e53945 | 3711 | struct drm_i915_gem_object *obj_priv; |
673a394b EA |
3712 | |
3713 | mutex_lock(&dev->struct_mutex); | |
3714 | ||
3715 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
3716 | if (obj == NULL) { | |
3717 | DRM_ERROR("Bad handle in i915_gem_unpin_ioctl(): %d\n", | |
3718 | args->handle); | |
3719 | mutex_unlock(&dev->struct_mutex); | |
3720 | return -EBADF; | |
3721 | } | |
3722 | ||
79e53945 JB |
3723 | obj_priv = obj->driver_private; |
3724 | if (obj_priv->pin_filp != file_priv) { | |
3725 | DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n", | |
3726 | args->handle); | |
3727 | drm_gem_object_unreference(obj); | |
3728 | mutex_unlock(&dev->struct_mutex); | |
3729 | return -EINVAL; | |
3730 | } | |
3731 | obj_priv->user_pin_count--; | |
3732 | if (obj_priv->user_pin_count == 0) { | |
3733 | obj_priv->pin_filp = NULL; | |
3734 | i915_gem_object_unpin(obj); | |
3735 | } | |
673a394b EA |
3736 | |
3737 | drm_gem_object_unreference(obj); | |
3738 | mutex_unlock(&dev->struct_mutex); | |
3739 | return 0; | |
3740 | } | |
3741 | ||
3742 | int | |
3743 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, | |
3744 | struct drm_file *file_priv) | |
3745 | { | |
3746 | struct drm_i915_gem_busy *args = data; | |
3747 | struct drm_gem_object *obj; | |
3748 | struct drm_i915_gem_object *obj_priv; | |
3749 | ||
673a394b EA |
3750 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
3751 | if (obj == NULL) { | |
3752 | DRM_ERROR("Bad handle in i915_gem_busy_ioctl(): %d\n", | |
3753 | args->handle); | |
673a394b EA |
3754 | return -EBADF; |
3755 | } | |
3756 | ||
b1ce786c | 3757 | mutex_lock(&dev->struct_mutex); |
f21289b3 EA |
3758 | /* Update the active list for the hardware's current position. |
3759 | * Otherwise this only updates on a delayed timer or when irqs are | |
3760 | * actually unmasked, and our working set ends up being larger than | |
3761 | * required. | |
3762 | */ | |
3763 | i915_gem_retire_requests(dev); | |
3764 | ||
673a394b | 3765 | obj_priv = obj->driver_private; |
c4de0a5d EA |
3766 | /* Don't count being on the flushing list against the object being |
3767 | * done. Otherwise, a buffer left on the flushing list but not getting | |
3768 | * flushed (because nobody's flushing that domain) won't ever return | |
3769 | * unbusy and get reused by libdrm's bo cache. The other expected | |
3770 | * consumer of this interface, OpenGL's occlusion queries, also specs | |
3771 | * that the objects get unbusy "eventually" without any interference. | |
3772 | */ | |
3773 | args->busy = obj_priv->active && obj_priv->last_rendering_seqno != 0; | |
673a394b EA |
3774 | |
3775 | drm_gem_object_unreference(obj); | |
3776 | mutex_unlock(&dev->struct_mutex); | |
3777 | return 0; | |
3778 | } | |
3779 | ||
3780 | int | |
3781 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, | |
3782 | struct drm_file *file_priv) | |
3783 | { | |
3784 | return i915_gem_ring_throttle(dev, file_priv); | |
3785 | } | |
3786 | ||
3787 | int i915_gem_init_object(struct drm_gem_object *obj) | |
3788 | { | |
3789 | struct drm_i915_gem_object *obj_priv; | |
3790 | ||
9a298b2a | 3791 | obj_priv = kzalloc(sizeof(*obj_priv), GFP_KERNEL); |
673a394b EA |
3792 | if (obj_priv == NULL) |
3793 | return -ENOMEM; | |
3794 | ||
3795 | /* | |
3796 | * We've just allocated pages from the kernel, | |
3797 | * so they've just been written by the CPU with | |
3798 | * zeros. They'll need to be clflushed before we | |
3799 | * use them with the GPU. | |
3800 | */ | |
3801 | obj->write_domain = I915_GEM_DOMAIN_CPU; | |
3802 | obj->read_domains = I915_GEM_DOMAIN_CPU; | |
3803 | ||
ba1eb1d8 KP |
3804 | obj_priv->agp_type = AGP_USER_MEMORY; |
3805 | ||
673a394b EA |
3806 | obj->driver_private = obj_priv; |
3807 | obj_priv->obj = obj; | |
de151cf6 | 3808 | obj_priv->fence_reg = I915_FENCE_REG_NONE; |
673a394b | 3809 | INIT_LIST_HEAD(&obj_priv->list); |
de151cf6 | 3810 | |
673a394b EA |
3811 | return 0; |
3812 | } | |
3813 | ||
3814 | void i915_gem_free_object(struct drm_gem_object *obj) | |
3815 | { | |
de151cf6 | 3816 | struct drm_device *dev = obj->dev; |
673a394b EA |
3817 | struct drm_i915_gem_object *obj_priv = obj->driver_private; |
3818 | ||
3819 | while (obj_priv->pin_count > 0) | |
3820 | i915_gem_object_unpin(obj); | |
3821 | ||
71acb5eb DA |
3822 | if (obj_priv->phys_obj) |
3823 | i915_gem_detach_phys_object(dev, obj); | |
3824 | ||
673a394b EA |
3825 | i915_gem_object_unbind(obj); |
3826 | ||
ab00b3e5 | 3827 | i915_gem_free_mmap_offset(obj); |
de151cf6 | 3828 | |
9a298b2a | 3829 | kfree(obj_priv->page_cpu_valid); |
280b713b | 3830 | kfree(obj_priv->bit_17); |
9a298b2a | 3831 | kfree(obj->driver_private); |
673a394b EA |
3832 | } |
3833 | ||
673a394b EA |
3834 | /** Unbinds all objects that are on the given buffer list. */ |
3835 | static int | |
3836 | i915_gem_evict_from_list(struct drm_device *dev, struct list_head *head) | |
3837 | { | |
3838 | struct drm_gem_object *obj; | |
3839 | struct drm_i915_gem_object *obj_priv; | |
3840 | int ret; | |
3841 | ||
3842 | while (!list_empty(head)) { | |
3843 | obj_priv = list_first_entry(head, | |
3844 | struct drm_i915_gem_object, | |
3845 | list); | |
3846 | obj = obj_priv->obj; | |
3847 | ||
3848 | if (obj_priv->pin_count != 0) { | |
3849 | DRM_ERROR("Pinned object in unbind list\n"); | |
3850 | mutex_unlock(&dev->struct_mutex); | |
3851 | return -EINVAL; | |
3852 | } | |
3853 | ||
3854 | ret = i915_gem_object_unbind(obj); | |
3855 | if (ret != 0) { | |
3856 | DRM_ERROR("Error unbinding object in LeaveVT: %d\n", | |
3857 | ret); | |
3858 | mutex_unlock(&dev->struct_mutex); | |
3859 | return ret; | |
3860 | } | |
3861 | } | |
3862 | ||
3863 | ||
3864 | return 0; | |
3865 | } | |
3866 | ||
5669fcac | 3867 | int |
673a394b EA |
3868 | i915_gem_idle(struct drm_device *dev) |
3869 | { | |
3870 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3871 | uint32_t seqno, cur_seqno, last_seqno; | |
3872 | int stuck, ret; | |
3873 | ||
6dbe2772 KP |
3874 | mutex_lock(&dev->struct_mutex); |
3875 | ||
3876 | if (dev_priv->mm.suspended || dev_priv->ring.ring_obj == NULL) { | |
3877 | mutex_unlock(&dev->struct_mutex); | |
673a394b | 3878 | return 0; |
6dbe2772 | 3879 | } |
673a394b EA |
3880 | |
3881 | /* Hack! Don't let anybody do execbuf while we don't control the chip. | |
3882 | * We need to replace this with a semaphore, or something. | |
3883 | */ | |
3884 | dev_priv->mm.suspended = 1; | |
3885 | ||
6dbe2772 KP |
3886 | /* Cancel the retire work handler, wait for it to finish if running |
3887 | */ | |
3888 | mutex_unlock(&dev->struct_mutex); | |
3889 | cancel_delayed_work_sync(&dev_priv->mm.retire_work); | |
3890 | mutex_lock(&dev->struct_mutex); | |
3891 | ||
673a394b EA |
3892 | i915_kernel_lost_context(dev); |
3893 | ||
3894 | /* Flush the GPU along with all non-CPU write domains | |
3895 | */ | |
21d509e3 CW |
3896 | i915_gem_flush(dev, I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS); |
3897 | seqno = i915_add_request(dev, NULL, I915_GEM_GPU_DOMAINS); | |
673a394b EA |
3898 | |
3899 | if (seqno == 0) { | |
3900 | mutex_unlock(&dev->struct_mutex); | |
3901 | return -ENOMEM; | |
3902 | } | |
3903 | ||
3904 | dev_priv->mm.waiting_gem_seqno = seqno; | |
3905 | last_seqno = 0; | |
3906 | stuck = 0; | |
3907 | for (;;) { | |
3908 | cur_seqno = i915_get_gem_seqno(dev); | |
3909 | if (i915_seqno_passed(cur_seqno, seqno)) | |
3910 | break; | |
3911 | if (last_seqno == cur_seqno) { | |
3912 | if (stuck++ > 100) { | |
3913 | DRM_ERROR("hardware wedged\n"); | |
3914 | dev_priv->mm.wedged = 1; | |
3915 | DRM_WAKEUP(&dev_priv->irq_queue); | |
3916 | break; | |
3917 | } | |
3918 | } | |
3919 | msleep(10); | |
3920 | last_seqno = cur_seqno; | |
3921 | } | |
3922 | dev_priv->mm.waiting_gem_seqno = 0; | |
3923 | ||
3924 | i915_gem_retire_requests(dev); | |
3925 | ||
5e118f41 | 3926 | spin_lock(&dev_priv->mm.active_list_lock); |
28dfe52a EA |
3927 | if (!dev_priv->mm.wedged) { |
3928 | /* Active and flushing should now be empty as we've | |
3929 | * waited for a sequence higher than any pending execbuffer | |
3930 | */ | |
3931 | WARN_ON(!list_empty(&dev_priv->mm.active_list)); | |
3932 | WARN_ON(!list_empty(&dev_priv->mm.flushing_list)); | |
3933 | /* Request should now be empty as we've also waited | |
3934 | * for the last request in the list | |
3935 | */ | |
3936 | WARN_ON(!list_empty(&dev_priv->mm.request_list)); | |
3937 | } | |
673a394b | 3938 | |
28dfe52a EA |
3939 | /* Empty the active and flushing lists to inactive. If there's |
3940 | * anything left at this point, it means that we're wedged and | |
3941 | * nothing good's going to happen by leaving them there. So strip | |
3942 | * the GPU domains and just stuff them onto inactive. | |
673a394b | 3943 | */ |
28dfe52a EA |
3944 | while (!list_empty(&dev_priv->mm.active_list)) { |
3945 | struct drm_i915_gem_object *obj_priv; | |
673a394b | 3946 | |
28dfe52a EA |
3947 | obj_priv = list_first_entry(&dev_priv->mm.active_list, |
3948 | struct drm_i915_gem_object, | |
3949 | list); | |
3950 | obj_priv->obj->write_domain &= ~I915_GEM_GPU_DOMAINS; | |
3951 | i915_gem_object_move_to_inactive(obj_priv->obj); | |
3952 | } | |
5e118f41 | 3953 | spin_unlock(&dev_priv->mm.active_list_lock); |
28dfe52a EA |
3954 | |
3955 | while (!list_empty(&dev_priv->mm.flushing_list)) { | |
3956 | struct drm_i915_gem_object *obj_priv; | |
3957 | ||
151903d5 | 3958 | obj_priv = list_first_entry(&dev_priv->mm.flushing_list, |
28dfe52a EA |
3959 | struct drm_i915_gem_object, |
3960 | list); | |
3961 | obj_priv->obj->write_domain &= ~I915_GEM_GPU_DOMAINS; | |
3962 | i915_gem_object_move_to_inactive(obj_priv->obj); | |
3963 | } | |
3964 | ||
3965 | ||
3966 | /* Move all inactive buffers out of the GTT. */ | |
673a394b | 3967 | ret = i915_gem_evict_from_list(dev, &dev_priv->mm.inactive_list); |
28dfe52a | 3968 | WARN_ON(!list_empty(&dev_priv->mm.inactive_list)); |
6dbe2772 KP |
3969 | if (ret) { |
3970 | mutex_unlock(&dev->struct_mutex); | |
673a394b | 3971 | return ret; |
6dbe2772 | 3972 | } |
673a394b | 3973 | |
6dbe2772 KP |
3974 | i915_gem_cleanup_ringbuffer(dev); |
3975 | mutex_unlock(&dev->struct_mutex); | |
3976 | ||
673a394b EA |
3977 | return 0; |
3978 | } | |
3979 | ||
3980 | static int | |
3981 | i915_gem_init_hws(struct drm_device *dev) | |
3982 | { | |
3983 | drm_i915_private_t *dev_priv = dev->dev_private; | |
3984 | struct drm_gem_object *obj; | |
3985 | struct drm_i915_gem_object *obj_priv; | |
3986 | int ret; | |
3987 | ||
3988 | /* If we need a physical address for the status page, it's already | |
3989 | * initialized at driver load time. | |
3990 | */ | |
3991 | if (!I915_NEED_GFX_HWS(dev)) | |
3992 | return 0; | |
3993 | ||
3994 | obj = drm_gem_object_alloc(dev, 4096); | |
3995 | if (obj == NULL) { | |
3996 | DRM_ERROR("Failed to allocate status page\n"); | |
3997 | return -ENOMEM; | |
3998 | } | |
3999 | obj_priv = obj->driver_private; | |
ba1eb1d8 | 4000 | obj_priv->agp_type = AGP_USER_CACHED_MEMORY; |
673a394b EA |
4001 | |
4002 | ret = i915_gem_object_pin(obj, 4096); | |
4003 | if (ret != 0) { | |
4004 | drm_gem_object_unreference(obj); | |
4005 | return ret; | |
4006 | } | |
4007 | ||
4008 | dev_priv->status_gfx_addr = obj_priv->gtt_offset; | |
673a394b | 4009 | |
856fa198 | 4010 | dev_priv->hw_status_page = kmap(obj_priv->pages[0]); |
ba1eb1d8 | 4011 | if (dev_priv->hw_status_page == NULL) { |
673a394b EA |
4012 | DRM_ERROR("Failed to map status page.\n"); |
4013 | memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); | |
3eb2ee77 | 4014 | i915_gem_object_unpin(obj); |
673a394b EA |
4015 | drm_gem_object_unreference(obj); |
4016 | return -EINVAL; | |
4017 | } | |
4018 | dev_priv->hws_obj = obj; | |
673a394b EA |
4019 | memset(dev_priv->hw_status_page, 0, PAGE_SIZE); |
4020 | I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr); | |
ba1eb1d8 | 4021 | I915_READ(HWS_PGA); /* posting read */ |
673a394b EA |
4022 | DRM_DEBUG("hws offset: 0x%08x\n", dev_priv->status_gfx_addr); |
4023 | ||
4024 | return 0; | |
4025 | } | |
4026 | ||
85a7bb98 CW |
4027 | static void |
4028 | i915_gem_cleanup_hws(struct drm_device *dev) | |
4029 | { | |
4030 | drm_i915_private_t *dev_priv = dev->dev_private; | |
bab2d1f6 CW |
4031 | struct drm_gem_object *obj; |
4032 | struct drm_i915_gem_object *obj_priv; | |
85a7bb98 CW |
4033 | |
4034 | if (dev_priv->hws_obj == NULL) | |
4035 | return; | |
4036 | ||
bab2d1f6 CW |
4037 | obj = dev_priv->hws_obj; |
4038 | obj_priv = obj->driver_private; | |
4039 | ||
856fa198 | 4040 | kunmap(obj_priv->pages[0]); |
85a7bb98 CW |
4041 | i915_gem_object_unpin(obj); |
4042 | drm_gem_object_unreference(obj); | |
4043 | dev_priv->hws_obj = NULL; | |
bab2d1f6 | 4044 | |
85a7bb98 CW |
4045 | memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); |
4046 | dev_priv->hw_status_page = NULL; | |
4047 | ||
4048 | /* Write high address into HWS_PGA when disabling. */ | |
4049 | I915_WRITE(HWS_PGA, 0x1ffff000); | |
4050 | } | |
4051 | ||
79e53945 | 4052 | int |
673a394b EA |
4053 | i915_gem_init_ringbuffer(struct drm_device *dev) |
4054 | { | |
4055 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4056 | struct drm_gem_object *obj; | |
4057 | struct drm_i915_gem_object *obj_priv; | |
79e53945 | 4058 | drm_i915_ring_buffer_t *ring = &dev_priv->ring; |
673a394b | 4059 | int ret; |
50aa253d | 4060 | u32 head; |
673a394b EA |
4061 | |
4062 | ret = i915_gem_init_hws(dev); | |
4063 | if (ret != 0) | |
4064 | return ret; | |
4065 | ||
4066 | obj = drm_gem_object_alloc(dev, 128 * 1024); | |
4067 | if (obj == NULL) { | |
4068 | DRM_ERROR("Failed to allocate ringbuffer\n"); | |
85a7bb98 | 4069 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4070 | return -ENOMEM; |
4071 | } | |
4072 | obj_priv = obj->driver_private; | |
4073 | ||
4074 | ret = i915_gem_object_pin(obj, 4096); | |
4075 | if (ret != 0) { | |
4076 | drm_gem_object_unreference(obj); | |
85a7bb98 | 4077 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4078 | return ret; |
4079 | } | |
4080 | ||
4081 | /* Set up the kernel mapping for the ring. */ | |
79e53945 JB |
4082 | ring->Size = obj->size; |
4083 | ring->tail_mask = obj->size - 1; | |
673a394b | 4084 | |
79e53945 JB |
4085 | ring->map.offset = dev->agp->base + obj_priv->gtt_offset; |
4086 | ring->map.size = obj->size; | |
4087 | ring->map.type = 0; | |
4088 | ring->map.flags = 0; | |
4089 | ring->map.mtrr = 0; | |
673a394b | 4090 | |
79e53945 JB |
4091 | drm_core_ioremap_wc(&ring->map, dev); |
4092 | if (ring->map.handle == NULL) { | |
673a394b EA |
4093 | DRM_ERROR("Failed to map ringbuffer.\n"); |
4094 | memset(&dev_priv->ring, 0, sizeof(dev_priv->ring)); | |
47ed185a | 4095 | i915_gem_object_unpin(obj); |
673a394b | 4096 | drm_gem_object_unreference(obj); |
85a7bb98 | 4097 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4098 | return -EINVAL; |
4099 | } | |
79e53945 JB |
4100 | ring->ring_obj = obj; |
4101 | ring->virtual_start = ring->map.handle; | |
673a394b EA |
4102 | |
4103 | /* Stop the ring if it's running. */ | |
4104 | I915_WRITE(PRB0_CTL, 0); | |
673a394b | 4105 | I915_WRITE(PRB0_TAIL, 0); |
50aa253d | 4106 | I915_WRITE(PRB0_HEAD, 0); |
673a394b EA |
4107 | |
4108 | /* Initialize the ring. */ | |
4109 | I915_WRITE(PRB0_START, obj_priv->gtt_offset); | |
50aa253d KP |
4110 | head = I915_READ(PRB0_HEAD) & HEAD_ADDR; |
4111 | ||
4112 | /* G45 ring initialization fails to reset head to zero */ | |
4113 | if (head != 0) { | |
4114 | DRM_ERROR("Ring head not reset to zero " | |
4115 | "ctl %08x head %08x tail %08x start %08x\n", | |
4116 | I915_READ(PRB0_CTL), | |
4117 | I915_READ(PRB0_HEAD), | |
4118 | I915_READ(PRB0_TAIL), | |
4119 | I915_READ(PRB0_START)); | |
4120 | I915_WRITE(PRB0_HEAD, 0); | |
4121 | ||
4122 | DRM_ERROR("Ring head forced to zero " | |
4123 | "ctl %08x head %08x tail %08x start %08x\n", | |
4124 | I915_READ(PRB0_CTL), | |
4125 | I915_READ(PRB0_HEAD), | |
4126 | I915_READ(PRB0_TAIL), | |
4127 | I915_READ(PRB0_START)); | |
4128 | } | |
4129 | ||
673a394b EA |
4130 | I915_WRITE(PRB0_CTL, |
4131 | ((obj->size - 4096) & RING_NR_PAGES) | | |
4132 | RING_NO_REPORT | | |
4133 | RING_VALID); | |
4134 | ||
50aa253d KP |
4135 | head = I915_READ(PRB0_HEAD) & HEAD_ADDR; |
4136 | ||
4137 | /* If the head is still not zero, the ring is dead */ | |
4138 | if (head != 0) { | |
4139 | DRM_ERROR("Ring initialization failed " | |
4140 | "ctl %08x head %08x tail %08x start %08x\n", | |
4141 | I915_READ(PRB0_CTL), | |
4142 | I915_READ(PRB0_HEAD), | |
4143 | I915_READ(PRB0_TAIL), | |
4144 | I915_READ(PRB0_START)); | |
4145 | return -EIO; | |
4146 | } | |
4147 | ||
673a394b | 4148 | /* Update our cache of the ring state */ |
79e53945 JB |
4149 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
4150 | i915_kernel_lost_context(dev); | |
4151 | else { | |
4152 | ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR; | |
4153 | ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR; | |
4154 | ring->space = ring->head - (ring->tail + 8); | |
4155 | if (ring->space < 0) | |
4156 | ring->space += ring->Size; | |
4157 | } | |
673a394b EA |
4158 | |
4159 | return 0; | |
4160 | } | |
4161 | ||
79e53945 | 4162 | void |
673a394b EA |
4163 | i915_gem_cleanup_ringbuffer(struct drm_device *dev) |
4164 | { | |
4165 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4166 | ||
4167 | if (dev_priv->ring.ring_obj == NULL) | |
4168 | return; | |
4169 | ||
4170 | drm_core_ioremapfree(&dev_priv->ring.map, dev); | |
4171 | ||
4172 | i915_gem_object_unpin(dev_priv->ring.ring_obj); | |
4173 | drm_gem_object_unreference(dev_priv->ring.ring_obj); | |
4174 | dev_priv->ring.ring_obj = NULL; | |
4175 | memset(&dev_priv->ring, 0, sizeof(dev_priv->ring)); | |
4176 | ||
85a7bb98 | 4177 | i915_gem_cleanup_hws(dev); |
673a394b EA |
4178 | } |
4179 | ||
4180 | int | |
4181 | i915_gem_entervt_ioctl(struct drm_device *dev, void *data, | |
4182 | struct drm_file *file_priv) | |
4183 | { | |
4184 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4185 | int ret; | |
4186 | ||
79e53945 JB |
4187 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4188 | return 0; | |
4189 | ||
673a394b EA |
4190 | if (dev_priv->mm.wedged) { |
4191 | DRM_ERROR("Reenabling wedged hardware, good luck\n"); | |
4192 | dev_priv->mm.wedged = 0; | |
4193 | } | |
4194 | ||
673a394b | 4195 | mutex_lock(&dev->struct_mutex); |
9bb2d6f9 EA |
4196 | dev_priv->mm.suspended = 0; |
4197 | ||
4198 | ret = i915_gem_init_ringbuffer(dev); | |
d816f6ac WF |
4199 | if (ret != 0) { |
4200 | mutex_unlock(&dev->struct_mutex); | |
9bb2d6f9 | 4201 | return ret; |
d816f6ac | 4202 | } |
9bb2d6f9 | 4203 | |
5e118f41 | 4204 | spin_lock(&dev_priv->mm.active_list_lock); |
673a394b | 4205 | BUG_ON(!list_empty(&dev_priv->mm.active_list)); |
5e118f41 CW |
4206 | spin_unlock(&dev_priv->mm.active_list_lock); |
4207 | ||
673a394b EA |
4208 | BUG_ON(!list_empty(&dev_priv->mm.flushing_list)); |
4209 | BUG_ON(!list_empty(&dev_priv->mm.inactive_list)); | |
4210 | BUG_ON(!list_empty(&dev_priv->mm.request_list)); | |
673a394b | 4211 | mutex_unlock(&dev->struct_mutex); |
dbb19d30 KH |
4212 | |
4213 | drm_irq_install(dev); | |
4214 | ||
673a394b EA |
4215 | return 0; |
4216 | } | |
4217 | ||
4218 | int | |
4219 | i915_gem_leavevt_ioctl(struct drm_device *dev, void *data, | |
4220 | struct drm_file *file_priv) | |
4221 | { | |
4222 | int ret; | |
4223 | ||
79e53945 JB |
4224 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4225 | return 0; | |
4226 | ||
673a394b | 4227 | ret = i915_gem_idle(dev); |
dbb19d30 KH |
4228 | drm_irq_uninstall(dev); |
4229 | ||
6dbe2772 | 4230 | return ret; |
673a394b EA |
4231 | } |
4232 | ||
4233 | void | |
4234 | i915_gem_lastclose(struct drm_device *dev) | |
4235 | { | |
4236 | int ret; | |
673a394b | 4237 | |
e806b495 EA |
4238 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
4239 | return; | |
4240 | ||
6dbe2772 KP |
4241 | ret = i915_gem_idle(dev); |
4242 | if (ret) | |
4243 | DRM_ERROR("failed to idle hardware: %d\n", ret); | |
673a394b EA |
4244 | } |
4245 | ||
4246 | void | |
4247 | i915_gem_load(struct drm_device *dev) | |
4248 | { | |
b5aa8a0f | 4249 | int i; |
673a394b EA |
4250 | drm_i915_private_t *dev_priv = dev->dev_private; |
4251 | ||
5e118f41 | 4252 | spin_lock_init(&dev_priv->mm.active_list_lock); |
673a394b EA |
4253 | INIT_LIST_HEAD(&dev_priv->mm.active_list); |
4254 | INIT_LIST_HEAD(&dev_priv->mm.flushing_list); | |
4255 | INIT_LIST_HEAD(&dev_priv->mm.inactive_list); | |
4256 | INIT_LIST_HEAD(&dev_priv->mm.request_list); | |
4257 | INIT_DELAYED_WORK(&dev_priv->mm.retire_work, | |
4258 | i915_gem_retire_work_handler); | |
4259 | dev_priv->mm.next_gem_seqno = 1; | |
4260 | ||
de151cf6 JB |
4261 | /* Old X drivers will take 0-2 for front, back, depth buffers */ |
4262 | dev_priv->fence_reg_start = 3; | |
4263 | ||
0f973f27 | 4264 | if (IS_I965G(dev) || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) |
de151cf6 JB |
4265 | dev_priv->num_fence_regs = 16; |
4266 | else | |
4267 | dev_priv->num_fence_regs = 8; | |
4268 | ||
b5aa8a0f GH |
4269 | /* Initialize fence registers to zero */ |
4270 | if (IS_I965G(dev)) { | |
4271 | for (i = 0; i < 16; i++) | |
4272 | I915_WRITE64(FENCE_REG_965_0 + (i * 8), 0); | |
4273 | } else { | |
4274 | for (i = 0; i < 8; i++) | |
4275 | I915_WRITE(FENCE_REG_830_0 + (i * 4), 0); | |
4276 | if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) | |
4277 | for (i = 0; i < 8; i++) | |
4278 | I915_WRITE(FENCE_REG_945_8 + (i * 4), 0); | |
4279 | } | |
4280 | ||
673a394b EA |
4281 | i915_gem_detect_bit_6_swizzle(dev); |
4282 | } | |
71acb5eb DA |
4283 | |
4284 | /* | |
4285 | * Create a physically contiguous memory object for this object | |
4286 | * e.g. for cursor + overlay regs | |
4287 | */ | |
4288 | int i915_gem_init_phys_object(struct drm_device *dev, | |
4289 | int id, int size) | |
4290 | { | |
4291 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4292 | struct drm_i915_gem_phys_object *phys_obj; | |
4293 | int ret; | |
4294 | ||
4295 | if (dev_priv->mm.phys_objs[id - 1] || !size) | |
4296 | return 0; | |
4297 | ||
9a298b2a | 4298 | phys_obj = kzalloc(sizeof(struct drm_i915_gem_phys_object), GFP_KERNEL); |
71acb5eb DA |
4299 | if (!phys_obj) |
4300 | return -ENOMEM; | |
4301 | ||
4302 | phys_obj->id = id; | |
4303 | ||
4304 | phys_obj->handle = drm_pci_alloc(dev, size, 0, 0xffffffff); | |
4305 | if (!phys_obj->handle) { | |
4306 | ret = -ENOMEM; | |
4307 | goto kfree_obj; | |
4308 | } | |
4309 | #ifdef CONFIG_X86 | |
4310 | set_memory_wc((unsigned long)phys_obj->handle->vaddr, phys_obj->handle->size / PAGE_SIZE); | |
4311 | #endif | |
4312 | ||
4313 | dev_priv->mm.phys_objs[id - 1] = phys_obj; | |
4314 | ||
4315 | return 0; | |
4316 | kfree_obj: | |
9a298b2a | 4317 | kfree(phys_obj); |
71acb5eb DA |
4318 | return ret; |
4319 | } | |
4320 | ||
4321 | void i915_gem_free_phys_object(struct drm_device *dev, int id) | |
4322 | { | |
4323 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4324 | struct drm_i915_gem_phys_object *phys_obj; | |
4325 | ||
4326 | if (!dev_priv->mm.phys_objs[id - 1]) | |
4327 | return; | |
4328 | ||
4329 | phys_obj = dev_priv->mm.phys_objs[id - 1]; | |
4330 | if (phys_obj->cur_obj) { | |
4331 | i915_gem_detach_phys_object(dev, phys_obj->cur_obj); | |
4332 | } | |
4333 | ||
4334 | #ifdef CONFIG_X86 | |
4335 | set_memory_wb((unsigned long)phys_obj->handle->vaddr, phys_obj->handle->size / PAGE_SIZE); | |
4336 | #endif | |
4337 | drm_pci_free(dev, phys_obj->handle); | |
4338 | kfree(phys_obj); | |
4339 | dev_priv->mm.phys_objs[id - 1] = NULL; | |
4340 | } | |
4341 | ||
4342 | void i915_gem_free_all_phys_object(struct drm_device *dev) | |
4343 | { | |
4344 | int i; | |
4345 | ||
260883c8 | 4346 | for (i = I915_GEM_PHYS_CURSOR_0; i <= I915_MAX_PHYS_OBJECT; i++) |
71acb5eb DA |
4347 | i915_gem_free_phys_object(dev, i); |
4348 | } | |
4349 | ||
4350 | void i915_gem_detach_phys_object(struct drm_device *dev, | |
4351 | struct drm_gem_object *obj) | |
4352 | { | |
4353 | struct drm_i915_gem_object *obj_priv; | |
4354 | int i; | |
4355 | int ret; | |
4356 | int page_count; | |
4357 | ||
4358 | obj_priv = obj->driver_private; | |
4359 | if (!obj_priv->phys_obj) | |
4360 | return; | |
4361 | ||
856fa198 | 4362 | ret = i915_gem_object_get_pages(obj); |
71acb5eb DA |
4363 | if (ret) |
4364 | goto out; | |
4365 | ||
4366 | page_count = obj->size / PAGE_SIZE; | |
4367 | ||
4368 | for (i = 0; i < page_count; i++) { | |
856fa198 | 4369 | char *dst = kmap_atomic(obj_priv->pages[i], KM_USER0); |
71acb5eb DA |
4370 | char *src = obj_priv->phys_obj->handle->vaddr + (i * PAGE_SIZE); |
4371 | ||
4372 | memcpy(dst, src, PAGE_SIZE); | |
4373 | kunmap_atomic(dst, KM_USER0); | |
4374 | } | |
856fa198 | 4375 | drm_clflush_pages(obj_priv->pages, page_count); |
71acb5eb | 4376 | drm_agp_chipset_flush(dev); |
d78b47b9 CW |
4377 | |
4378 | i915_gem_object_put_pages(obj); | |
71acb5eb DA |
4379 | out: |
4380 | obj_priv->phys_obj->cur_obj = NULL; | |
4381 | obj_priv->phys_obj = NULL; | |
4382 | } | |
4383 | ||
4384 | int | |
4385 | i915_gem_attach_phys_object(struct drm_device *dev, | |
4386 | struct drm_gem_object *obj, int id) | |
4387 | { | |
4388 | drm_i915_private_t *dev_priv = dev->dev_private; | |
4389 | struct drm_i915_gem_object *obj_priv; | |
4390 | int ret = 0; | |
4391 | int page_count; | |
4392 | int i; | |
4393 | ||
4394 | if (id > I915_MAX_PHYS_OBJECT) | |
4395 | return -EINVAL; | |
4396 | ||
4397 | obj_priv = obj->driver_private; | |
4398 | ||
4399 | if (obj_priv->phys_obj) { | |
4400 | if (obj_priv->phys_obj->id == id) | |
4401 | return 0; | |
4402 | i915_gem_detach_phys_object(dev, obj); | |
4403 | } | |
4404 | ||
4405 | ||
4406 | /* create a new object */ | |
4407 | if (!dev_priv->mm.phys_objs[id - 1]) { | |
4408 | ret = i915_gem_init_phys_object(dev, id, | |
4409 | obj->size); | |
4410 | if (ret) { | |
aeb565df | 4411 | DRM_ERROR("failed to init phys object %d size: %zu\n", id, obj->size); |
71acb5eb DA |
4412 | goto out; |
4413 | } | |
4414 | } | |
4415 | ||
4416 | /* bind to the object */ | |
4417 | obj_priv->phys_obj = dev_priv->mm.phys_objs[id - 1]; | |
4418 | obj_priv->phys_obj->cur_obj = obj; | |
4419 | ||
856fa198 | 4420 | ret = i915_gem_object_get_pages(obj); |
71acb5eb DA |
4421 | if (ret) { |
4422 | DRM_ERROR("failed to get page list\n"); | |
4423 | goto out; | |
4424 | } | |
4425 | ||
4426 | page_count = obj->size / PAGE_SIZE; | |
4427 | ||
4428 | for (i = 0; i < page_count; i++) { | |
856fa198 | 4429 | char *src = kmap_atomic(obj_priv->pages[i], KM_USER0); |
71acb5eb DA |
4430 | char *dst = obj_priv->phys_obj->handle->vaddr + (i * PAGE_SIZE); |
4431 | ||
4432 | memcpy(dst, src, PAGE_SIZE); | |
4433 | kunmap_atomic(src, KM_USER0); | |
4434 | } | |
4435 | ||
d78b47b9 CW |
4436 | i915_gem_object_put_pages(obj); |
4437 | ||
71acb5eb DA |
4438 | return 0; |
4439 | out: | |
4440 | return ret; | |
4441 | } | |
4442 | ||
4443 | static int | |
4444 | i915_gem_phys_pwrite(struct drm_device *dev, struct drm_gem_object *obj, | |
4445 | struct drm_i915_gem_pwrite *args, | |
4446 | struct drm_file *file_priv) | |
4447 | { | |
4448 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
4449 | void *obj_addr; | |
4450 | int ret; | |
4451 | char __user *user_data; | |
4452 | ||
4453 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
4454 | obj_addr = obj_priv->phys_obj->handle->vaddr + args->offset; | |
4455 | ||
e08fb4f6 | 4456 | DRM_DEBUG("obj_addr %p, %lld\n", obj_addr, args->size); |
71acb5eb DA |
4457 | ret = copy_from_user(obj_addr, user_data, args->size); |
4458 | if (ret) | |
4459 | return -EFAULT; | |
4460 | ||
4461 | drm_agp_chipset_flush(dev); | |
4462 | return 0; | |
4463 | } | |
b962442e EA |
4464 | |
4465 | void i915_gem_release(struct drm_device * dev, struct drm_file *file_priv) | |
4466 | { | |
4467 | struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv; | |
4468 | ||
4469 | /* Clean up our request list when the client is going away, so that | |
4470 | * later retire_requests won't dereference our soon-to-be-gone | |
4471 | * file_priv. | |
4472 | */ | |
4473 | mutex_lock(&dev->struct_mutex); | |
4474 | while (!list_empty(&i915_file_priv->mm.request_list)) | |
4475 | list_del_init(i915_file_priv->mm.request_list.next); | |
4476 | mutex_unlock(&dev->struct_mutex); | |
4477 | } |