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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> | |
33 | ||
34 | static int | |
35 | i915_gem_object_set_domain(struct drm_gem_object *obj, | |
36 | uint32_t read_domains, | |
37 | uint32_t write_domain); | |
38 | static int | |
39 | i915_gem_object_set_domain_range(struct drm_gem_object *obj, | |
40 | uint64_t offset, | |
41 | uint64_t size, | |
42 | uint32_t read_domains, | |
43 | uint32_t write_domain); | |
44 | static int | |
45 | i915_gem_set_domain(struct drm_gem_object *obj, | |
46 | struct drm_file *file_priv, | |
47 | uint32_t read_domains, | |
48 | uint32_t write_domain); | |
49 | static int i915_gem_object_get_page_list(struct drm_gem_object *obj); | |
50 | static void i915_gem_object_free_page_list(struct drm_gem_object *obj); | |
51 | static int i915_gem_object_wait_rendering(struct drm_gem_object *obj); | |
52 | ||
53 | int | |
54 | i915_gem_init_ioctl(struct drm_device *dev, void *data, | |
55 | struct drm_file *file_priv) | |
56 | { | |
57 | drm_i915_private_t *dev_priv = dev->dev_private; | |
58 | struct drm_i915_gem_init *args = data; | |
59 | ||
60 | mutex_lock(&dev->struct_mutex); | |
61 | ||
62 | if (args->gtt_start >= args->gtt_end || | |
63 | (args->gtt_start & (PAGE_SIZE - 1)) != 0 || | |
64 | (args->gtt_end & (PAGE_SIZE - 1)) != 0) { | |
65 | mutex_unlock(&dev->struct_mutex); | |
66 | return -EINVAL; | |
67 | } | |
68 | ||
69 | drm_mm_init(&dev_priv->mm.gtt_space, args->gtt_start, | |
70 | args->gtt_end - args->gtt_start); | |
71 | ||
72 | dev->gtt_total = (uint32_t) (args->gtt_end - args->gtt_start); | |
73 | ||
74 | mutex_unlock(&dev->struct_mutex); | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
79 | ||
80 | /** | |
81 | * Creates a new mm object and returns a handle to it. | |
82 | */ | |
83 | int | |
84 | i915_gem_create_ioctl(struct drm_device *dev, void *data, | |
85 | struct drm_file *file_priv) | |
86 | { | |
87 | struct drm_i915_gem_create *args = data; | |
88 | struct drm_gem_object *obj; | |
89 | int handle, ret; | |
90 | ||
91 | args->size = roundup(args->size, PAGE_SIZE); | |
92 | ||
93 | /* Allocate the new object */ | |
94 | obj = drm_gem_object_alloc(dev, args->size); | |
95 | if (obj == NULL) | |
96 | return -ENOMEM; | |
97 | ||
98 | ret = drm_gem_handle_create(file_priv, obj, &handle); | |
99 | mutex_lock(&dev->struct_mutex); | |
100 | drm_gem_object_handle_unreference(obj); | |
101 | mutex_unlock(&dev->struct_mutex); | |
102 | ||
103 | if (ret) | |
104 | return ret; | |
105 | ||
106 | args->handle = handle; | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | /** | |
112 | * Reads data from the object referenced by handle. | |
113 | * | |
114 | * On error, the contents of *data are undefined. | |
115 | */ | |
116 | int | |
117 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, | |
118 | struct drm_file *file_priv) | |
119 | { | |
120 | struct drm_i915_gem_pread *args = data; | |
121 | struct drm_gem_object *obj; | |
122 | struct drm_i915_gem_object *obj_priv; | |
123 | ssize_t read; | |
124 | loff_t offset; | |
125 | int ret; | |
126 | ||
127 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
128 | if (obj == NULL) | |
129 | return -EBADF; | |
130 | obj_priv = obj->driver_private; | |
131 | ||
132 | /* Bounds check source. | |
133 | * | |
134 | * XXX: This could use review for overflow issues... | |
135 | */ | |
136 | if (args->offset > obj->size || args->size > obj->size || | |
137 | args->offset + args->size > obj->size) { | |
138 | drm_gem_object_unreference(obj); | |
139 | return -EINVAL; | |
140 | } | |
141 | ||
142 | mutex_lock(&dev->struct_mutex); | |
143 | ||
144 | ret = i915_gem_object_set_domain_range(obj, args->offset, args->size, | |
145 | I915_GEM_DOMAIN_CPU, 0); | |
146 | if (ret != 0) { | |
147 | drm_gem_object_unreference(obj); | |
148 | mutex_unlock(&dev->struct_mutex); | |
e7d22bc3 | 149 | return ret; |
673a394b EA |
150 | } |
151 | ||
152 | offset = args->offset; | |
153 | ||
154 | read = vfs_read(obj->filp, (char __user *)(uintptr_t)args->data_ptr, | |
155 | args->size, &offset); | |
156 | if (read != args->size) { | |
157 | drm_gem_object_unreference(obj); | |
158 | mutex_unlock(&dev->struct_mutex); | |
159 | if (read < 0) | |
160 | return read; | |
161 | else | |
162 | return -EINVAL; | |
163 | } | |
164 | ||
165 | drm_gem_object_unreference(obj); | |
166 | mutex_unlock(&dev->struct_mutex); | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static int | |
172 | i915_gem_gtt_pwrite(struct drm_device *dev, struct drm_gem_object *obj, | |
173 | struct drm_i915_gem_pwrite *args, | |
174 | struct drm_file *file_priv) | |
175 | { | |
176 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
177 | ssize_t remain; | |
178 | loff_t offset; | |
179 | char __user *user_data; | |
3043c60c EA |
180 | char __iomem *vaddr; |
181 | char *vaddr_atomic; | |
673a394b EA |
182 | int i, o, l; |
183 | int ret = 0; | |
184 | unsigned long pfn; | |
185 | unsigned long unwritten; | |
186 | ||
187 | user_data = (char __user *) (uintptr_t) args->data_ptr; | |
188 | remain = args->size; | |
189 | if (!access_ok(VERIFY_READ, user_data, remain)) | |
190 | return -EFAULT; | |
191 | ||
192 | ||
193 | mutex_lock(&dev->struct_mutex); | |
194 | ret = i915_gem_object_pin(obj, 0); | |
195 | if (ret) { | |
196 | mutex_unlock(&dev->struct_mutex); | |
197 | return ret; | |
198 | } | |
199 | ret = i915_gem_set_domain(obj, file_priv, | |
200 | I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT); | |
201 | if (ret) | |
202 | goto fail; | |
203 | ||
204 | obj_priv = obj->driver_private; | |
205 | offset = obj_priv->gtt_offset + args->offset; | |
206 | obj_priv->dirty = 1; | |
207 | ||
208 | while (remain > 0) { | |
209 | /* Operation in this page | |
210 | * | |
211 | * i = page number | |
212 | * o = offset within page | |
213 | * l = bytes to copy | |
214 | */ | |
215 | i = offset >> PAGE_SHIFT; | |
216 | o = offset & (PAGE_SIZE-1); | |
217 | l = remain; | |
218 | if ((o + l) > PAGE_SIZE) | |
219 | l = PAGE_SIZE - o; | |
220 | ||
221 | pfn = (dev->agp->base >> PAGE_SHIFT) + i; | |
222 | ||
223 | #ifdef CONFIG_HIGHMEM | |
3043c60c EA |
224 | /* This is a workaround for the low performance of iounmap |
225 | * (approximate 10% cpu cost on normal 3D workloads). | |
226 | * kmap_atomic on HIGHMEM kernels happens to let us map card | |
227 | * memory without taking IPIs. When the vmap rework lands | |
228 | * we should be able to dump this hack. | |
673a394b | 229 | */ |
3043c60c | 230 | vaddr_atomic = kmap_atomic_pfn(pfn, KM_USER0); |
673a394b EA |
231 | #if WATCH_PWRITE |
232 | DRM_INFO("pwrite i %d o %d l %d pfn %ld vaddr %p\n", | |
3043c60c | 233 | i, o, l, pfn, vaddr_atomic); |
673a394b | 234 | #endif |
3043c60c | 235 | unwritten = __copy_from_user_inatomic_nocache(vaddr_atomic + o, |
673a394b | 236 | user_data, l); |
3043c60c | 237 | kunmap_atomic(vaddr_atomic, KM_USER0); |
673a394b EA |
238 | |
239 | if (unwritten) | |
240 | #endif /* CONFIG_HIGHMEM */ | |
241 | { | |
bd88ee4c | 242 | vaddr = ioremap_wc(pfn << PAGE_SHIFT, PAGE_SIZE); |
673a394b EA |
243 | #if WATCH_PWRITE |
244 | DRM_INFO("pwrite slow i %d o %d l %d " | |
245 | "pfn %ld vaddr %p\n", | |
246 | i, o, l, pfn, vaddr); | |
247 | #endif | |
248 | if (vaddr == NULL) { | |
249 | ret = -EFAULT; | |
250 | goto fail; | |
251 | } | |
252 | unwritten = __copy_from_user(vaddr + o, user_data, l); | |
253 | #if WATCH_PWRITE | |
254 | DRM_INFO("unwritten %ld\n", unwritten); | |
255 | #endif | |
256 | iounmap(vaddr); | |
257 | if (unwritten) { | |
258 | ret = -EFAULT; | |
259 | goto fail; | |
260 | } | |
261 | } | |
262 | ||
263 | remain -= l; | |
264 | user_data += l; | |
265 | offset += l; | |
266 | } | |
267 | #if WATCH_PWRITE && 1 | |
268 | i915_gem_clflush_object(obj); | |
269 | i915_gem_dump_object(obj, args->offset + args->size, __func__, ~0); | |
270 | i915_gem_clflush_object(obj); | |
271 | #endif | |
272 | ||
273 | fail: | |
274 | i915_gem_object_unpin(obj); | |
275 | mutex_unlock(&dev->struct_mutex); | |
276 | ||
277 | return ret; | |
278 | } | |
279 | ||
3043c60c | 280 | static int |
673a394b EA |
281 | i915_gem_shmem_pwrite(struct drm_device *dev, struct drm_gem_object *obj, |
282 | struct drm_i915_gem_pwrite *args, | |
283 | struct drm_file *file_priv) | |
284 | { | |
285 | int ret; | |
286 | loff_t offset; | |
287 | ssize_t written; | |
288 | ||
289 | mutex_lock(&dev->struct_mutex); | |
290 | ||
291 | ret = i915_gem_set_domain(obj, file_priv, | |
292 | I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU); | |
293 | if (ret) { | |
294 | mutex_unlock(&dev->struct_mutex); | |
295 | return ret; | |
296 | } | |
297 | ||
298 | offset = args->offset; | |
299 | ||
300 | written = vfs_write(obj->filp, | |
301 | (char __user *)(uintptr_t) args->data_ptr, | |
302 | args->size, &offset); | |
303 | if (written != args->size) { | |
304 | mutex_unlock(&dev->struct_mutex); | |
305 | if (written < 0) | |
306 | return written; | |
307 | else | |
308 | return -EINVAL; | |
309 | } | |
310 | ||
311 | mutex_unlock(&dev->struct_mutex); | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | /** | |
317 | * Writes data to the object referenced by handle. | |
318 | * | |
319 | * On error, the contents of the buffer that were to be modified are undefined. | |
320 | */ | |
321 | int | |
322 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, | |
323 | struct drm_file *file_priv) | |
324 | { | |
325 | struct drm_i915_gem_pwrite *args = data; | |
326 | struct drm_gem_object *obj; | |
327 | struct drm_i915_gem_object *obj_priv; | |
328 | int ret = 0; | |
329 | ||
330 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
331 | if (obj == NULL) | |
332 | return -EBADF; | |
333 | obj_priv = obj->driver_private; | |
334 | ||
335 | /* Bounds check destination. | |
336 | * | |
337 | * XXX: This could use review for overflow issues... | |
338 | */ | |
339 | if (args->offset > obj->size || args->size > obj->size || | |
340 | args->offset + args->size > obj->size) { | |
341 | drm_gem_object_unreference(obj); | |
342 | return -EINVAL; | |
343 | } | |
344 | ||
345 | /* We can only do the GTT pwrite on untiled buffers, as otherwise | |
346 | * it would end up going through the fenced access, and we'll get | |
347 | * different detiling behavior between reading and writing. | |
348 | * pread/pwrite currently are reading and writing from the CPU | |
349 | * perspective, requiring manual detiling by the client. | |
350 | */ | |
351 | if (obj_priv->tiling_mode == I915_TILING_NONE && | |
352 | dev->gtt_total != 0) | |
353 | ret = i915_gem_gtt_pwrite(dev, obj, args, file_priv); | |
354 | else | |
355 | ret = i915_gem_shmem_pwrite(dev, obj, args, file_priv); | |
356 | ||
357 | #if WATCH_PWRITE | |
358 | if (ret) | |
359 | DRM_INFO("pwrite failed %d\n", ret); | |
360 | #endif | |
361 | ||
362 | drm_gem_object_unreference(obj); | |
363 | ||
364 | return ret; | |
365 | } | |
366 | ||
367 | /** | |
368 | * Called when user space prepares to use an object | |
369 | */ | |
370 | int | |
371 | i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, | |
372 | struct drm_file *file_priv) | |
373 | { | |
374 | struct drm_i915_gem_set_domain *args = data; | |
375 | struct drm_gem_object *obj; | |
376 | int ret; | |
377 | ||
378 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
379 | return -ENODEV; | |
380 | ||
381 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
382 | if (obj == NULL) | |
383 | return -EBADF; | |
384 | ||
385 | mutex_lock(&dev->struct_mutex); | |
386 | #if WATCH_BUF | |
387 | DRM_INFO("set_domain_ioctl %p(%d), %08x %08x\n", | |
388 | obj, obj->size, args->read_domains, args->write_domain); | |
389 | #endif | |
390 | ret = i915_gem_set_domain(obj, file_priv, | |
391 | args->read_domains, args->write_domain); | |
392 | drm_gem_object_unreference(obj); | |
393 | mutex_unlock(&dev->struct_mutex); | |
394 | return ret; | |
395 | } | |
396 | ||
397 | /** | |
398 | * Called when user space has done writes to this buffer | |
399 | */ | |
400 | int | |
401 | i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, | |
402 | struct drm_file *file_priv) | |
403 | { | |
404 | struct drm_i915_gem_sw_finish *args = data; | |
405 | struct drm_gem_object *obj; | |
406 | struct drm_i915_gem_object *obj_priv; | |
407 | int ret = 0; | |
408 | ||
409 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
410 | return -ENODEV; | |
411 | ||
412 | mutex_lock(&dev->struct_mutex); | |
413 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
414 | if (obj == NULL) { | |
415 | mutex_unlock(&dev->struct_mutex); | |
416 | return -EBADF; | |
417 | } | |
418 | ||
419 | #if WATCH_BUF | |
420 | DRM_INFO("%s: sw_finish %d (%p %d)\n", | |
421 | __func__, args->handle, obj, obj->size); | |
422 | #endif | |
423 | obj_priv = obj->driver_private; | |
424 | ||
425 | /* Pinned buffers may be scanout, so flush the cache */ | |
426 | if ((obj->write_domain & I915_GEM_DOMAIN_CPU) && obj_priv->pin_count) { | |
427 | i915_gem_clflush_object(obj); | |
428 | drm_agp_chipset_flush(dev); | |
429 | } | |
430 | drm_gem_object_unreference(obj); | |
431 | mutex_unlock(&dev->struct_mutex); | |
432 | return ret; | |
433 | } | |
434 | ||
435 | /** | |
436 | * Maps the contents of an object, returning the address it is mapped | |
437 | * into. | |
438 | * | |
439 | * While the mapping holds a reference on the contents of the object, it doesn't | |
440 | * imply a ref on the object itself. | |
441 | */ | |
442 | int | |
443 | i915_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
444 | struct drm_file *file_priv) | |
445 | { | |
446 | struct drm_i915_gem_mmap *args = data; | |
447 | struct drm_gem_object *obj; | |
448 | loff_t offset; | |
449 | unsigned long addr; | |
450 | ||
451 | if (!(dev->driver->driver_features & DRIVER_GEM)) | |
452 | return -ENODEV; | |
453 | ||
454 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
455 | if (obj == NULL) | |
456 | return -EBADF; | |
457 | ||
458 | offset = args->offset; | |
459 | ||
460 | down_write(¤t->mm->mmap_sem); | |
461 | addr = do_mmap(obj->filp, 0, args->size, | |
462 | PROT_READ | PROT_WRITE, MAP_SHARED, | |
463 | args->offset); | |
464 | up_write(¤t->mm->mmap_sem); | |
465 | mutex_lock(&dev->struct_mutex); | |
466 | drm_gem_object_unreference(obj); | |
467 | mutex_unlock(&dev->struct_mutex); | |
468 | if (IS_ERR((void *)addr)) | |
469 | return addr; | |
470 | ||
471 | args->addr_ptr = (uint64_t) addr; | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | static void | |
477 | i915_gem_object_free_page_list(struct drm_gem_object *obj) | |
478 | { | |
479 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
480 | int page_count = obj->size / PAGE_SIZE; | |
481 | int i; | |
482 | ||
483 | if (obj_priv->page_list == NULL) | |
484 | return; | |
485 | ||
486 | ||
487 | for (i = 0; i < page_count; i++) | |
488 | if (obj_priv->page_list[i] != NULL) { | |
489 | if (obj_priv->dirty) | |
490 | set_page_dirty(obj_priv->page_list[i]); | |
491 | mark_page_accessed(obj_priv->page_list[i]); | |
492 | page_cache_release(obj_priv->page_list[i]); | |
493 | } | |
494 | obj_priv->dirty = 0; | |
495 | ||
496 | drm_free(obj_priv->page_list, | |
497 | page_count * sizeof(struct page *), | |
498 | DRM_MEM_DRIVER); | |
499 | obj_priv->page_list = NULL; | |
500 | } | |
501 | ||
502 | static void | |
503 | i915_gem_object_move_to_active(struct drm_gem_object *obj) | |
504 | { | |
505 | struct drm_device *dev = obj->dev; | |
506 | drm_i915_private_t *dev_priv = dev->dev_private; | |
507 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
508 | ||
509 | /* Add a reference if we're newly entering the active list. */ | |
510 | if (!obj_priv->active) { | |
511 | drm_gem_object_reference(obj); | |
512 | obj_priv->active = 1; | |
513 | } | |
514 | /* Move from whatever list we were on to the tail of execution. */ | |
515 | list_move_tail(&obj_priv->list, | |
516 | &dev_priv->mm.active_list); | |
517 | } | |
518 | ||
519 | ||
520 | static void | |
521 | i915_gem_object_move_to_inactive(struct drm_gem_object *obj) | |
522 | { | |
523 | struct drm_device *dev = obj->dev; | |
524 | drm_i915_private_t *dev_priv = dev->dev_private; | |
525 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
526 | ||
527 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
528 | if (obj_priv->pin_count != 0) | |
529 | list_del_init(&obj_priv->list); | |
530 | else | |
531 | list_move_tail(&obj_priv->list, &dev_priv->mm.inactive_list); | |
532 | ||
533 | if (obj_priv->active) { | |
534 | obj_priv->active = 0; | |
535 | drm_gem_object_unreference(obj); | |
536 | } | |
537 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
538 | } | |
539 | ||
540 | /** | |
541 | * Creates a new sequence number, emitting a write of it to the status page | |
542 | * plus an interrupt, which will trigger i915_user_interrupt_handler. | |
543 | * | |
544 | * Must be called with struct_lock held. | |
545 | * | |
546 | * Returned sequence numbers are nonzero on success. | |
547 | */ | |
548 | static uint32_t | |
549 | i915_add_request(struct drm_device *dev, uint32_t flush_domains) | |
550 | { | |
551 | drm_i915_private_t *dev_priv = dev->dev_private; | |
552 | struct drm_i915_gem_request *request; | |
553 | uint32_t seqno; | |
554 | int was_empty; | |
555 | RING_LOCALS; | |
556 | ||
557 | request = drm_calloc(1, sizeof(*request), DRM_MEM_DRIVER); | |
558 | if (request == NULL) | |
559 | return 0; | |
560 | ||
561 | /* Grab the seqno we're going to make this request be, and bump the | |
562 | * next (skipping 0 so it can be the reserved no-seqno value). | |
563 | */ | |
564 | seqno = dev_priv->mm.next_gem_seqno; | |
565 | dev_priv->mm.next_gem_seqno++; | |
566 | if (dev_priv->mm.next_gem_seqno == 0) | |
567 | dev_priv->mm.next_gem_seqno++; | |
568 | ||
569 | BEGIN_LP_RING(4); | |
570 | OUT_RING(MI_STORE_DWORD_INDEX); | |
571 | OUT_RING(I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); | |
572 | OUT_RING(seqno); | |
573 | ||
574 | OUT_RING(MI_USER_INTERRUPT); | |
575 | ADVANCE_LP_RING(); | |
576 | ||
577 | DRM_DEBUG("%d\n", seqno); | |
578 | ||
579 | request->seqno = seqno; | |
580 | request->emitted_jiffies = jiffies; | |
581 | request->flush_domains = flush_domains; | |
582 | was_empty = list_empty(&dev_priv->mm.request_list); | |
583 | list_add_tail(&request->list, &dev_priv->mm.request_list); | |
584 | ||
585 | if (was_empty) | |
586 | schedule_delayed_work(&dev_priv->mm.retire_work, HZ); | |
587 | return seqno; | |
588 | } | |
589 | ||
590 | /** | |
591 | * Command execution barrier | |
592 | * | |
593 | * Ensures that all commands in the ring are finished | |
594 | * before signalling the CPU | |
595 | */ | |
3043c60c | 596 | static uint32_t |
673a394b EA |
597 | i915_retire_commands(struct drm_device *dev) |
598 | { | |
599 | drm_i915_private_t *dev_priv = dev->dev_private; | |
600 | uint32_t cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; | |
601 | uint32_t flush_domains = 0; | |
602 | RING_LOCALS; | |
603 | ||
604 | /* The sampler always gets flushed on i965 (sigh) */ | |
605 | if (IS_I965G(dev)) | |
606 | flush_domains |= I915_GEM_DOMAIN_SAMPLER; | |
607 | BEGIN_LP_RING(2); | |
608 | OUT_RING(cmd); | |
609 | OUT_RING(0); /* noop */ | |
610 | ADVANCE_LP_RING(); | |
611 | return flush_domains; | |
612 | } | |
613 | ||
614 | /** | |
615 | * Moves buffers associated only with the given active seqno from the active | |
616 | * to inactive list, potentially freeing them. | |
617 | */ | |
618 | static void | |
619 | i915_gem_retire_request(struct drm_device *dev, | |
620 | struct drm_i915_gem_request *request) | |
621 | { | |
622 | drm_i915_private_t *dev_priv = dev->dev_private; | |
623 | ||
624 | /* Move any buffers on the active list that are no longer referenced | |
625 | * by the ringbuffer to the flushing/inactive lists as appropriate. | |
626 | */ | |
627 | while (!list_empty(&dev_priv->mm.active_list)) { | |
628 | struct drm_gem_object *obj; | |
629 | struct drm_i915_gem_object *obj_priv; | |
630 | ||
631 | obj_priv = list_first_entry(&dev_priv->mm.active_list, | |
632 | struct drm_i915_gem_object, | |
633 | list); | |
634 | obj = obj_priv->obj; | |
635 | ||
636 | /* If the seqno being retired doesn't match the oldest in the | |
637 | * list, then the oldest in the list must still be newer than | |
638 | * this seqno. | |
639 | */ | |
640 | if (obj_priv->last_rendering_seqno != request->seqno) | |
641 | return; | |
642 | #if WATCH_LRU | |
643 | DRM_INFO("%s: retire %d moves to inactive list %p\n", | |
644 | __func__, request->seqno, obj); | |
645 | #endif | |
646 | ||
647 | if (obj->write_domain != 0) { | |
648 | list_move_tail(&obj_priv->list, | |
649 | &dev_priv->mm.flushing_list); | |
650 | } else { | |
651 | i915_gem_object_move_to_inactive(obj); | |
652 | } | |
653 | } | |
654 | ||
655 | if (request->flush_domains != 0) { | |
656 | struct drm_i915_gem_object *obj_priv, *next; | |
657 | ||
658 | /* Clear the write domain and activity from any buffers | |
659 | * that are just waiting for a flush matching the one retired. | |
660 | */ | |
661 | list_for_each_entry_safe(obj_priv, next, | |
662 | &dev_priv->mm.flushing_list, list) { | |
663 | struct drm_gem_object *obj = obj_priv->obj; | |
664 | ||
665 | if (obj->write_domain & request->flush_domains) { | |
666 | obj->write_domain = 0; | |
667 | i915_gem_object_move_to_inactive(obj); | |
668 | } | |
669 | } | |
670 | ||
671 | } | |
672 | } | |
673 | ||
674 | /** | |
675 | * Returns true if seq1 is later than seq2. | |
676 | */ | |
677 | static int | |
678 | i915_seqno_passed(uint32_t seq1, uint32_t seq2) | |
679 | { | |
680 | return (int32_t)(seq1 - seq2) >= 0; | |
681 | } | |
682 | ||
683 | uint32_t | |
684 | i915_get_gem_seqno(struct drm_device *dev) | |
685 | { | |
686 | drm_i915_private_t *dev_priv = dev->dev_private; | |
687 | ||
688 | return READ_HWSP(dev_priv, I915_GEM_HWS_INDEX); | |
689 | } | |
690 | ||
691 | /** | |
692 | * This function clears the request list as sequence numbers are passed. | |
693 | */ | |
694 | void | |
695 | i915_gem_retire_requests(struct drm_device *dev) | |
696 | { | |
697 | drm_i915_private_t *dev_priv = dev->dev_private; | |
698 | uint32_t seqno; | |
699 | ||
700 | seqno = i915_get_gem_seqno(dev); | |
701 | ||
702 | while (!list_empty(&dev_priv->mm.request_list)) { | |
703 | struct drm_i915_gem_request *request; | |
704 | uint32_t retiring_seqno; | |
705 | ||
706 | request = list_first_entry(&dev_priv->mm.request_list, | |
707 | struct drm_i915_gem_request, | |
708 | list); | |
709 | retiring_seqno = request->seqno; | |
710 | ||
711 | if (i915_seqno_passed(seqno, retiring_seqno) || | |
712 | dev_priv->mm.wedged) { | |
713 | i915_gem_retire_request(dev, request); | |
714 | ||
715 | list_del(&request->list); | |
716 | drm_free(request, sizeof(*request), DRM_MEM_DRIVER); | |
717 | } else | |
718 | break; | |
719 | } | |
720 | } | |
721 | ||
722 | void | |
723 | i915_gem_retire_work_handler(struct work_struct *work) | |
724 | { | |
725 | drm_i915_private_t *dev_priv; | |
726 | struct drm_device *dev; | |
727 | ||
728 | dev_priv = container_of(work, drm_i915_private_t, | |
729 | mm.retire_work.work); | |
730 | dev = dev_priv->dev; | |
731 | ||
732 | mutex_lock(&dev->struct_mutex); | |
733 | i915_gem_retire_requests(dev); | |
734 | if (!list_empty(&dev_priv->mm.request_list)) | |
735 | schedule_delayed_work(&dev_priv->mm.retire_work, HZ); | |
736 | mutex_unlock(&dev->struct_mutex); | |
737 | } | |
738 | ||
739 | /** | |
740 | * Waits for a sequence number to be signaled, and cleans up the | |
741 | * request and object lists appropriately for that event. | |
742 | */ | |
3043c60c | 743 | static int |
673a394b EA |
744 | i915_wait_request(struct drm_device *dev, uint32_t seqno) |
745 | { | |
746 | drm_i915_private_t *dev_priv = dev->dev_private; | |
747 | int ret = 0; | |
748 | ||
749 | BUG_ON(seqno == 0); | |
750 | ||
751 | if (!i915_seqno_passed(i915_get_gem_seqno(dev), seqno)) { | |
752 | dev_priv->mm.waiting_gem_seqno = seqno; | |
753 | i915_user_irq_get(dev); | |
754 | ret = wait_event_interruptible(dev_priv->irq_queue, | |
755 | i915_seqno_passed(i915_get_gem_seqno(dev), | |
756 | seqno) || | |
757 | dev_priv->mm.wedged); | |
758 | i915_user_irq_put(dev); | |
759 | dev_priv->mm.waiting_gem_seqno = 0; | |
760 | } | |
761 | if (dev_priv->mm.wedged) | |
762 | ret = -EIO; | |
763 | ||
764 | if (ret && ret != -ERESTARTSYS) | |
765 | DRM_ERROR("%s returns %d (awaiting %d at %d)\n", | |
766 | __func__, ret, seqno, i915_get_gem_seqno(dev)); | |
767 | ||
768 | /* Directly dispatch request retiring. While we have the work queue | |
769 | * to handle this, the waiter on a request often wants an associated | |
770 | * buffer to have made it to the inactive list, and we would need | |
771 | * a separate wait queue to handle that. | |
772 | */ | |
773 | if (ret == 0) | |
774 | i915_gem_retire_requests(dev); | |
775 | ||
776 | return ret; | |
777 | } | |
778 | ||
779 | static void | |
780 | i915_gem_flush(struct drm_device *dev, | |
781 | uint32_t invalidate_domains, | |
782 | uint32_t flush_domains) | |
783 | { | |
784 | drm_i915_private_t *dev_priv = dev->dev_private; | |
785 | uint32_t cmd; | |
786 | RING_LOCALS; | |
787 | ||
788 | #if WATCH_EXEC | |
789 | DRM_INFO("%s: invalidate %08x flush %08x\n", __func__, | |
790 | invalidate_domains, flush_domains); | |
791 | #endif | |
792 | ||
793 | if (flush_domains & I915_GEM_DOMAIN_CPU) | |
794 | drm_agp_chipset_flush(dev); | |
795 | ||
796 | if ((invalidate_domains | flush_domains) & ~(I915_GEM_DOMAIN_CPU | | |
797 | I915_GEM_DOMAIN_GTT)) { | |
798 | /* | |
799 | * read/write caches: | |
800 | * | |
801 | * I915_GEM_DOMAIN_RENDER is always invalidated, but is | |
802 | * only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is | |
803 | * also flushed at 2d versus 3d pipeline switches. | |
804 | * | |
805 | * read-only caches: | |
806 | * | |
807 | * I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if | |
808 | * MI_READ_FLUSH is set, and is always flushed on 965. | |
809 | * | |
810 | * I915_GEM_DOMAIN_COMMAND may not exist? | |
811 | * | |
812 | * I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is | |
813 | * invalidated when MI_EXE_FLUSH is set. | |
814 | * | |
815 | * I915_GEM_DOMAIN_VERTEX, which exists on 965, is | |
816 | * invalidated with every MI_FLUSH. | |
817 | * | |
818 | * TLBs: | |
819 | * | |
820 | * On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND | |
821 | * and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and | |
822 | * I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER | |
823 | * are flushed at any MI_FLUSH. | |
824 | */ | |
825 | ||
826 | cmd = MI_FLUSH | MI_NO_WRITE_FLUSH; | |
827 | if ((invalidate_domains|flush_domains) & | |
828 | I915_GEM_DOMAIN_RENDER) | |
829 | cmd &= ~MI_NO_WRITE_FLUSH; | |
830 | if (!IS_I965G(dev)) { | |
831 | /* | |
832 | * On the 965, the sampler cache always gets flushed | |
833 | * and this bit is reserved. | |
834 | */ | |
835 | if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER) | |
836 | cmd |= MI_READ_FLUSH; | |
837 | } | |
838 | if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION) | |
839 | cmd |= MI_EXE_FLUSH; | |
840 | ||
841 | #if WATCH_EXEC | |
842 | DRM_INFO("%s: queue flush %08x to ring\n", __func__, cmd); | |
843 | #endif | |
844 | BEGIN_LP_RING(2); | |
845 | OUT_RING(cmd); | |
846 | OUT_RING(0); /* noop */ | |
847 | ADVANCE_LP_RING(); | |
848 | } | |
849 | } | |
850 | ||
851 | /** | |
852 | * Ensures that all rendering to the object has completed and the object is | |
853 | * safe to unbind from the GTT or access from the CPU. | |
854 | */ | |
855 | static int | |
856 | i915_gem_object_wait_rendering(struct drm_gem_object *obj) | |
857 | { | |
858 | struct drm_device *dev = obj->dev; | |
859 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
860 | int ret; | |
861 | ||
862 | /* If there are writes queued to the buffer, flush and | |
863 | * create a new seqno to wait for. | |
864 | */ | |
865 | if (obj->write_domain & ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT)) { | |
866 | uint32_t write_domain = obj->write_domain; | |
867 | #if WATCH_BUF | |
868 | DRM_INFO("%s: flushing object %p from write domain %08x\n", | |
869 | __func__, obj, write_domain); | |
870 | #endif | |
871 | i915_gem_flush(dev, 0, write_domain); | |
872 | ||
873 | i915_gem_object_move_to_active(obj); | |
874 | obj_priv->last_rendering_seqno = i915_add_request(dev, | |
875 | write_domain); | |
876 | BUG_ON(obj_priv->last_rendering_seqno == 0); | |
877 | #if WATCH_LRU | |
878 | DRM_INFO("%s: flush moves to exec list %p\n", __func__, obj); | |
879 | #endif | |
880 | } | |
881 | ||
882 | /* If there is rendering queued on the buffer being evicted, wait for | |
883 | * it. | |
884 | */ | |
885 | if (obj_priv->active) { | |
886 | #if WATCH_BUF | |
887 | DRM_INFO("%s: object %p wait for seqno %08x\n", | |
888 | __func__, obj, obj_priv->last_rendering_seqno); | |
889 | #endif | |
890 | ret = i915_wait_request(dev, obj_priv->last_rendering_seqno); | |
891 | if (ret != 0) | |
892 | return ret; | |
893 | } | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
898 | /** | |
899 | * Unbinds an object from the GTT aperture. | |
900 | */ | |
901 | static int | |
902 | i915_gem_object_unbind(struct drm_gem_object *obj) | |
903 | { | |
904 | struct drm_device *dev = obj->dev; | |
905 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
906 | int ret = 0; | |
907 | ||
908 | #if WATCH_BUF | |
909 | DRM_INFO("%s:%d %p\n", __func__, __LINE__, obj); | |
910 | DRM_INFO("gtt_space %p\n", obj_priv->gtt_space); | |
911 | #endif | |
912 | if (obj_priv->gtt_space == NULL) | |
913 | return 0; | |
914 | ||
915 | if (obj_priv->pin_count != 0) { | |
916 | DRM_ERROR("Attempting to unbind pinned buffer\n"); | |
917 | return -EINVAL; | |
918 | } | |
919 | ||
920 | /* Wait for any rendering to complete | |
921 | */ | |
922 | ret = i915_gem_object_wait_rendering(obj); | |
923 | if (ret) { | |
924 | DRM_ERROR("wait_rendering failed: %d\n", ret); | |
925 | return ret; | |
926 | } | |
927 | ||
928 | /* Move the object to the CPU domain to ensure that | |
929 | * any possible CPU writes while it's not in the GTT | |
930 | * are flushed when we go to remap it. This will | |
931 | * also ensure that all pending GPU writes are finished | |
932 | * before we unbind. | |
933 | */ | |
934 | ret = i915_gem_object_set_domain(obj, I915_GEM_DOMAIN_CPU, | |
935 | I915_GEM_DOMAIN_CPU); | |
936 | if (ret) { | |
937 | DRM_ERROR("set_domain failed: %d\n", ret); | |
938 | return ret; | |
939 | } | |
940 | ||
941 | if (obj_priv->agp_mem != NULL) { | |
942 | drm_unbind_agp(obj_priv->agp_mem); | |
943 | drm_free_agp(obj_priv->agp_mem, obj->size / PAGE_SIZE); | |
944 | obj_priv->agp_mem = NULL; | |
945 | } | |
946 | ||
947 | BUG_ON(obj_priv->active); | |
948 | ||
949 | i915_gem_object_free_page_list(obj); | |
950 | ||
951 | if (obj_priv->gtt_space) { | |
952 | atomic_dec(&dev->gtt_count); | |
953 | atomic_sub(obj->size, &dev->gtt_memory); | |
954 | ||
955 | drm_mm_put_block(obj_priv->gtt_space); | |
956 | obj_priv->gtt_space = NULL; | |
957 | } | |
958 | ||
959 | /* Remove ourselves from the LRU list if present. */ | |
960 | if (!list_empty(&obj_priv->list)) | |
961 | list_del_init(&obj_priv->list); | |
962 | ||
963 | return 0; | |
964 | } | |
965 | ||
966 | static int | |
967 | i915_gem_evict_something(struct drm_device *dev) | |
968 | { | |
969 | drm_i915_private_t *dev_priv = dev->dev_private; | |
970 | struct drm_gem_object *obj; | |
971 | struct drm_i915_gem_object *obj_priv; | |
972 | int ret = 0; | |
973 | ||
974 | for (;;) { | |
975 | /* If there's an inactive buffer available now, grab it | |
976 | * and be done. | |
977 | */ | |
978 | if (!list_empty(&dev_priv->mm.inactive_list)) { | |
979 | obj_priv = list_first_entry(&dev_priv->mm.inactive_list, | |
980 | struct drm_i915_gem_object, | |
981 | list); | |
982 | obj = obj_priv->obj; | |
983 | BUG_ON(obj_priv->pin_count != 0); | |
984 | #if WATCH_LRU | |
985 | DRM_INFO("%s: evicting %p\n", __func__, obj); | |
986 | #endif | |
987 | BUG_ON(obj_priv->active); | |
988 | ||
989 | /* Wait on the rendering and unbind the buffer. */ | |
990 | ret = i915_gem_object_unbind(obj); | |
991 | break; | |
992 | } | |
993 | ||
994 | /* If we didn't get anything, but the ring is still processing | |
995 | * things, wait for one of those things to finish and hopefully | |
996 | * leave us a buffer to evict. | |
997 | */ | |
998 | if (!list_empty(&dev_priv->mm.request_list)) { | |
999 | struct drm_i915_gem_request *request; | |
1000 | ||
1001 | request = list_first_entry(&dev_priv->mm.request_list, | |
1002 | struct drm_i915_gem_request, | |
1003 | list); | |
1004 | ||
1005 | ret = i915_wait_request(dev, request->seqno); | |
1006 | if (ret) | |
1007 | break; | |
1008 | ||
1009 | /* if waiting caused an object to become inactive, | |
1010 | * then loop around and wait for it. Otherwise, we | |
1011 | * assume that waiting freed and unbound something, | |
1012 | * so there should now be some space in the GTT | |
1013 | */ | |
1014 | if (!list_empty(&dev_priv->mm.inactive_list)) | |
1015 | continue; | |
1016 | break; | |
1017 | } | |
1018 | ||
1019 | /* If we didn't have anything on the request list but there | |
1020 | * are buffers awaiting a flush, emit one and try again. | |
1021 | * When we wait on it, those buffers waiting for that flush | |
1022 | * will get moved to inactive. | |
1023 | */ | |
1024 | if (!list_empty(&dev_priv->mm.flushing_list)) { | |
1025 | obj_priv = list_first_entry(&dev_priv->mm.flushing_list, | |
1026 | struct drm_i915_gem_object, | |
1027 | list); | |
1028 | obj = obj_priv->obj; | |
1029 | ||
1030 | i915_gem_flush(dev, | |
1031 | obj->write_domain, | |
1032 | obj->write_domain); | |
1033 | i915_add_request(dev, obj->write_domain); | |
1034 | ||
1035 | obj = NULL; | |
1036 | continue; | |
1037 | } | |
1038 | ||
1039 | DRM_ERROR("inactive empty %d request empty %d " | |
1040 | "flushing empty %d\n", | |
1041 | list_empty(&dev_priv->mm.inactive_list), | |
1042 | list_empty(&dev_priv->mm.request_list), | |
1043 | list_empty(&dev_priv->mm.flushing_list)); | |
1044 | /* If we didn't do any of the above, there's nothing to be done | |
1045 | * and we just can't fit it in. | |
1046 | */ | |
1047 | return -ENOMEM; | |
1048 | } | |
1049 | return ret; | |
1050 | } | |
1051 | ||
1052 | static int | |
1053 | i915_gem_object_get_page_list(struct drm_gem_object *obj) | |
1054 | { | |
1055 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1056 | int page_count, i; | |
1057 | struct address_space *mapping; | |
1058 | struct inode *inode; | |
1059 | struct page *page; | |
1060 | int ret; | |
1061 | ||
1062 | if (obj_priv->page_list) | |
1063 | return 0; | |
1064 | ||
1065 | /* Get the list of pages out of our struct file. They'll be pinned | |
1066 | * at this point until we release them. | |
1067 | */ | |
1068 | page_count = obj->size / PAGE_SIZE; | |
1069 | BUG_ON(obj_priv->page_list != NULL); | |
1070 | obj_priv->page_list = drm_calloc(page_count, sizeof(struct page *), | |
1071 | DRM_MEM_DRIVER); | |
1072 | if (obj_priv->page_list == NULL) { | |
1073 | DRM_ERROR("Faled to allocate page list\n"); | |
1074 | return -ENOMEM; | |
1075 | } | |
1076 | ||
1077 | inode = obj->filp->f_path.dentry->d_inode; | |
1078 | mapping = inode->i_mapping; | |
1079 | for (i = 0; i < page_count; i++) { | |
1080 | page = read_mapping_page(mapping, i, NULL); | |
1081 | if (IS_ERR(page)) { | |
1082 | ret = PTR_ERR(page); | |
1083 | DRM_ERROR("read_mapping_page failed: %d\n", ret); | |
1084 | i915_gem_object_free_page_list(obj); | |
1085 | return ret; | |
1086 | } | |
1087 | obj_priv->page_list[i] = page; | |
1088 | } | |
1089 | return 0; | |
1090 | } | |
1091 | ||
1092 | /** | |
1093 | * Finds free space in the GTT aperture and binds the object there. | |
1094 | */ | |
1095 | static int | |
1096 | i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment) | |
1097 | { | |
1098 | struct drm_device *dev = obj->dev; | |
1099 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1100 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1101 | struct drm_mm_node *free_space; | |
1102 | int page_count, ret; | |
1103 | ||
1104 | if (alignment == 0) | |
1105 | alignment = PAGE_SIZE; | |
1106 | if (alignment & (PAGE_SIZE - 1)) { | |
1107 | DRM_ERROR("Invalid object alignment requested %u\n", alignment); | |
1108 | return -EINVAL; | |
1109 | } | |
1110 | ||
1111 | search_free: | |
1112 | free_space = drm_mm_search_free(&dev_priv->mm.gtt_space, | |
1113 | obj->size, alignment, 0); | |
1114 | if (free_space != NULL) { | |
1115 | obj_priv->gtt_space = drm_mm_get_block(free_space, obj->size, | |
1116 | alignment); | |
1117 | if (obj_priv->gtt_space != NULL) { | |
1118 | obj_priv->gtt_space->private = obj; | |
1119 | obj_priv->gtt_offset = obj_priv->gtt_space->start; | |
1120 | } | |
1121 | } | |
1122 | if (obj_priv->gtt_space == NULL) { | |
1123 | /* If the gtt is empty and we're still having trouble | |
1124 | * fitting our object in, we're out of memory. | |
1125 | */ | |
1126 | #if WATCH_LRU | |
1127 | DRM_INFO("%s: GTT full, evicting something\n", __func__); | |
1128 | #endif | |
1129 | if (list_empty(&dev_priv->mm.inactive_list) && | |
1130 | list_empty(&dev_priv->mm.flushing_list) && | |
1131 | list_empty(&dev_priv->mm.active_list)) { | |
1132 | DRM_ERROR("GTT full, but LRU list empty\n"); | |
1133 | return -ENOMEM; | |
1134 | } | |
1135 | ||
1136 | ret = i915_gem_evict_something(dev); | |
1137 | if (ret != 0) { | |
1138 | DRM_ERROR("Failed to evict a buffer %d\n", ret); | |
1139 | return ret; | |
1140 | } | |
1141 | goto search_free; | |
1142 | } | |
1143 | ||
1144 | #if WATCH_BUF | |
1145 | DRM_INFO("Binding object of size %d at 0x%08x\n", | |
1146 | obj->size, obj_priv->gtt_offset); | |
1147 | #endif | |
1148 | ret = i915_gem_object_get_page_list(obj); | |
1149 | if (ret) { | |
1150 | drm_mm_put_block(obj_priv->gtt_space); | |
1151 | obj_priv->gtt_space = NULL; | |
1152 | return ret; | |
1153 | } | |
1154 | ||
1155 | page_count = obj->size / PAGE_SIZE; | |
1156 | /* Create an AGP memory structure pointing at our pages, and bind it | |
1157 | * into the GTT. | |
1158 | */ | |
1159 | obj_priv->agp_mem = drm_agp_bind_pages(dev, | |
1160 | obj_priv->page_list, | |
1161 | page_count, | |
1162 | obj_priv->gtt_offset); | |
1163 | if (obj_priv->agp_mem == NULL) { | |
1164 | i915_gem_object_free_page_list(obj); | |
1165 | drm_mm_put_block(obj_priv->gtt_space); | |
1166 | obj_priv->gtt_space = NULL; | |
1167 | return -ENOMEM; | |
1168 | } | |
1169 | atomic_inc(&dev->gtt_count); | |
1170 | atomic_add(obj->size, &dev->gtt_memory); | |
1171 | ||
1172 | /* Assert that the object is not currently in any GPU domain. As it | |
1173 | * wasn't in the GTT, there shouldn't be any way it could have been in | |
1174 | * a GPU cache | |
1175 | */ | |
1176 | BUG_ON(obj->read_domains & ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT)); | |
1177 | BUG_ON(obj->write_domain & ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT)); | |
1178 | ||
1179 | return 0; | |
1180 | } | |
1181 | ||
1182 | void | |
1183 | i915_gem_clflush_object(struct drm_gem_object *obj) | |
1184 | { | |
1185 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1186 | ||
1187 | /* If we don't have a page list set up, then we're not pinned | |
1188 | * to GPU, and we can ignore the cache flush because it'll happen | |
1189 | * again at bind time. | |
1190 | */ | |
1191 | if (obj_priv->page_list == NULL) | |
1192 | return; | |
1193 | ||
1194 | drm_clflush_pages(obj_priv->page_list, obj->size / PAGE_SIZE); | |
1195 | } | |
1196 | ||
1197 | /* | |
1198 | * Set the next domain for the specified object. This | |
1199 | * may not actually perform the necessary flushing/invaliding though, | |
1200 | * as that may want to be batched with other set_domain operations | |
1201 | * | |
1202 | * This is (we hope) the only really tricky part of gem. The goal | |
1203 | * is fairly simple -- track which caches hold bits of the object | |
1204 | * and make sure they remain coherent. A few concrete examples may | |
1205 | * help to explain how it works. For shorthand, we use the notation | |
1206 | * (read_domains, write_domain), e.g. (CPU, CPU) to indicate the | |
1207 | * a pair of read and write domain masks. | |
1208 | * | |
1209 | * Case 1: the batch buffer | |
1210 | * | |
1211 | * 1. Allocated | |
1212 | * 2. Written by CPU | |
1213 | * 3. Mapped to GTT | |
1214 | * 4. Read by GPU | |
1215 | * 5. Unmapped from GTT | |
1216 | * 6. Freed | |
1217 | * | |
1218 | * Let's take these a step at a time | |
1219 | * | |
1220 | * 1. Allocated | |
1221 | * Pages allocated from the kernel may still have | |
1222 | * cache contents, so we set them to (CPU, CPU) always. | |
1223 | * 2. Written by CPU (using pwrite) | |
1224 | * The pwrite function calls set_domain (CPU, CPU) and | |
1225 | * this function does nothing (as nothing changes) | |
1226 | * 3. Mapped by GTT | |
1227 | * This function asserts that the object is not | |
1228 | * currently in any GPU-based read or write domains | |
1229 | * 4. Read by GPU | |
1230 | * i915_gem_execbuffer calls set_domain (COMMAND, 0). | |
1231 | * As write_domain is zero, this function adds in the | |
1232 | * current read domains (CPU+COMMAND, 0). | |
1233 | * flush_domains is set to CPU. | |
1234 | * invalidate_domains is set to COMMAND | |
1235 | * clflush is run to get data out of the CPU caches | |
1236 | * then i915_dev_set_domain calls i915_gem_flush to | |
1237 | * emit an MI_FLUSH and drm_agp_chipset_flush | |
1238 | * 5. Unmapped from GTT | |
1239 | * i915_gem_object_unbind calls set_domain (CPU, CPU) | |
1240 | * flush_domains and invalidate_domains end up both zero | |
1241 | * so no flushing/invalidating happens | |
1242 | * 6. Freed | |
1243 | * yay, done | |
1244 | * | |
1245 | * Case 2: The shared render buffer | |
1246 | * | |
1247 | * 1. Allocated | |
1248 | * 2. Mapped to GTT | |
1249 | * 3. Read/written by GPU | |
1250 | * 4. set_domain to (CPU,CPU) | |
1251 | * 5. Read/written by CPU | |
1252 | * 6. Read/written by GPU | |
1253 | * | |
1254 | * 1. Allocated | |
1255 | * Same as last example, (CPU, CPU) | |
1256 | * 2. Mapped to GTT | |
1257 | * Nothing changes (assertions find that it is not in the GPU) | |
1258 | * 3. Read/written by GPU | |
1259 | * execbuffer calls set_domain (RENDER, RENDER) | |
1260 | * flush_domains gets CPU | |
1261 | * invalidate_domains gets GPU | |
1262 | * clflush (obj) | |
1263 | * MI_FLUSH and drm_agp_chipset_flush | |
1264 | * 4. set_domain (CPU, CPU) | |
1265 | * flush_domains gets GPU | |
1266 | * invalidate_domains gets CPU | |
1267 | * wait_rendering (obj) to make sure all drawing is complete. | |
1268 | * This will include an MI_FLUSH to get the data from GPU | |
1269 | * to memory | |
1270 | * clflush (obj) to invalidate the CPU cache | |
1271 | * Another MI_FLUSH in i915_gem_flush (eliminate this somehow?) | |
1272 | * 5. Read/written by CPU | |
1273 | * cache lines are loaded and dirtied | |
1274 | * 6. Read written by GPU | |
1275 | * Same as last GPU access | |
1276 | * | |
1277 | * Case 3: The constant buffer | |
1278 | * | |
1279 | * 1. Allocated | |
1280 | * 2. Written by CPU | |
1281 | * 3. Read by GPU | |
1282 | * 4. Updated (written) by CPU again | |
1283 | * 5. Read by GPU | |
1284 | * | |
1285 | * 1. Allocated | |
1286 | * (CPU, CPU) | |
1287 | * 2. Written by CPU | |
1288 | * (CPU, CPU) | |
1289 | * 3. Read by GPU | |
1290 | * (CPU+RENDER, 0) | |
1291 | * flush_domains = CPU | |
1292 | * invalidate_domains = RENDER | |
1293 | * clflush (obj) | |
1294 | * MI_FLUSH | |
1295 | * drm_agp_chipset_flush | |
1296 | * 4. Updated (written) by CPU again | |
1297 | * (CPU, CPU) | |
1298 | * flush_domains = 0 (no previous write domain) | |
1299 | * invalidate_domains = 0 (no new read domains) | |
1300 | * 5. Read by GPU | |
1301 | * (CPU+RENDER, 0) | |
1302 | * flush_domains = CPU | |
1303 | * invalidate_domains = RENDER | |
1304 | * clflush (obj) | |
1305 | * MI_FLUSH | |
1306 | * drm_agp_chipset_flush | |
1307 | */ | |
1308 | static int | |
1309 | i915_gem_object_set_domain(struct drm_gem_object *obj, | |
1310 | uint32_t read_domains, | |
1311 | uint32_t write_domain) | |
1312 | { | |
1313 | struct drm_device *dev = obj->dev; | |
1314 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1315 | uint32_t invalidate_domains = 0; | |
1316 | uint32_t flush_domains = 0; | |
1317 | int ret; | |
1318 | ||
1319 | #if WATCH_BUF | |
1320 | DRM_INFO("%s: object %p read %08x -> %08x write %08x -> %08x\n", | |
1321 | __func__, obj, | |
1322 | obj->read_domains, read_domains, | |
1323 | obj->write_domain, write_domain); | |
1324 | #endif | |
1325 | /* | |
1326 | * If the object isn't moving to a new write domain, | |
1327 | * let the object stay in multiple read domains | |
1328 | */ | |
1329 | if (write_domain == 0) | |
1330 | read_domains |= obj->read_domains; | |
1331 | else | |
1332 | obj_priv->dirty = 1; | |
1333 | ||
1334 | /* | |
1335 | * Flush the current write domain if | |
1336 | * the new read domains don't match. Invalidate | |
1337 | * any read domains which differ from the old | |
1338 | * write domain | |
1339 | */ | |
1340 | if (obj->write_domain && obj->write_domain != read_domains) { | |
1341 | flush_domains |= obj->write_domain; | |
1342 | invalidate_domains |= read_domains & ~obj->write_domain; | |
1343 | } | |
1344 | /* | |
1345 | * Invalidate any read caches which may have | |
1346 | * stale data. That is, any new read domains. | |
1347 | */ | |
1348 | invalidate_domains |= read_domains & ~obj->read_domains; | |
1349 | if ((flush_domains | invalidate_domains) & I915_GEM_DOMAIN_CPU) { | |
1350 | #if WATCH_BUF | |
1351 | DRM_INFO("%s: CPU domain flush %08x invalidate %08x\n", | |
1352 | __func__, flush_domains, invalidate_domains); | |
1353 | #endif | |
1354 | /* | |
1355 | * If we're invaliding the CPU cache and flushing a GPU cache, | |
1356 | * then pause for rendering so that the GPU caches will be | |
1357 | * flushed before the cpu cache is invalidated | |
1358 | */ | |
1359 | if ((invalidate_domains & I915_GEM_DOMAIN_CPU) && | |
1360 | (flush_domains & ~(I915_GEM_DOMAIN_CPU | | |
1361 | I915_GEM_DOMAIN_GTT))) { | |
1362 | ret = i915_gem_object_wait_rendering(obj); | |
1363 | if (ret) | |
1364 | return ret; | |
1365 | } | |
1366 | i915_gem_clflush_object(obj); | |
1367 | } | |
1368 | ||
1369 | if ((write_domain | flush_domains) != 0) | |
1370 | obj->write_domain = write_domain; | |
1371 | ||
1372 | /* If we're invalidating the CPU domain, clear the per-page CPU | |
1373 | * domain list as well. | |
1374 | */ | |
1375 | if (obj_priv->page_cpu_valid != NULL && | |
1376 | (write_domain != 0 || | |
1377 | read_domains & I915_GEM_DOMAIN_CPU)) { | |
1378 | drm_free(obj_priv->page_cpu_valid, obj->size / PAGE_SIZE, | |
1379 | DRM_MEM_DRIVER); | |
1380 | obj_priv->page_cpu_valid = NULL; | |
1381 | } | |
1382 | obj->read_domains = read_domains; | |
1383 | ||
1384 | dev->invalidate_domains |= invalidate_domains; | |
1385 | dev->flush_domains |= flush_domains; | |
1386 | #if WATCH_BUF | |
1387 | DRM_INFO("%s: read %08x write %08x invalidate %08x flush %08x\n", | |
1388 | __func__, | |
1389 | obj->read_domains, obj->write_domain, | |
1390 | dev->invalidate_domains, dev->flush_domains); | |
1391 | #endif | |
1392 | return 0; | |
1393 | } | |
1394 | ||
1395 | /** | |
1396 | * Set the read/write domain on a range of the object. | |
1397 | * | |
1398 | * Currently only implemented for CPU reads, otherwise drops to normal | |
1399 | * i915_gem_object_set_domain(). | |
1400 | */ | |
1401 | static int | |
1402 | i915_gem_object_set_domain_range(struct drm_gem_object *obj, | |
1403 | uint64_t offset, | |
1404 | uint64_t size, | |
1405 | uint32_t read_domains, | |
1406 | uint32_t write_domain) | |
1407 | { | |
1408 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1409 | int ret, i; | |
1410 | ||
1411 | if (obj->read_domains & I915_GEM_DOMAIN_CPU) | |
1412 | return 0; | |
1413 | ||
1414 | if (read_domains != I915_GEM_DOMAIN_CPU || | |
1415 | write_domain != 0) | |
1416 | return i915_gem_object_set_domain(obj, | |
1417 | read_domains, write_domain); | |
1418 | ||
1419 | /* Wait on any GPU rendering to the object to be flushed. */ | |
1420 | if (obj->write_domain & ~(I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT)) { | |
1421 | ret = i915_gem_object_wait_rendering(obj); | |
1422 | if (ret) | |
1423 | return ret; | |
1424 | } | |
1425 | ||
1426 | if (obj_priv->page_cpu_valid == NULL) { | |
1427 | obj_priv->page_cpu_valid = drm_calloc(1, obj->size / PAGE_SIZE, | |
1428 | DRM_MEM_DRIVER); | |
1429 | } | |
1430 | ||
1431 | /* Flush the cache on any pages that are still invalid from the CPU's | |
1432 | * perspective. | |
1433 | */ | |
1434 | for (i = offset / PAGE_SIZE; i <= (offset + size - 1) / PAGE_SIZE; i++) { | |
1435 | if (obj_priv->page_cpu_valid[i]) | |
1436 | continue; | |
1437 | ||
1438 | drm_clflush_pages(obj_priv->page_list + i, 1); | |
1439 | ||
1440 | obj_priv->page_cpu_valid[i] = 1; | |
1441 | } | |
1442 | ||
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | /** | |
1447 | * Once all of the objects have been set in the proper domain, | |
1448 | * perform the necessary flush and invalidate operations. | |
1449 | * | |
1450 | * Returns the write domains flushed, for use in flush tracking. | |
1451 | */ | |
1452 | static uint32_t | |
1453 | i915_gem_dev_set_domain(struct drm_device *dev) | |
1454 | { | |
1455 | uint32_t flush_domains = dev->flush_domains; | |
1456 | ||
1457 | /* | |
1458 | * Now that all the buffers are synced to the proper domains, | |
1459 | * flush and invalidate the collected domains | |
1460 | */ | |
1461 | if (dev->invalidate_domains | dev->flush_domains) { | |
1462 | #if WATCH_EXEC | |
1463 | DRM_INFO("%s: invalidate_domains %08x flush_domains %08x\n", | |
1464 | __func__, | |
1465 | dev->invalidate_domains, | |
1466 | dev->flush_domains); | |
1467 | #endif | |
1468 | i915_gem_flush(dev, | |
1469 | dev->invalidate_domains, | |
1470 | dev->flush_domains); | |
1471 | dev->invalidate_domains = 0; | |
1472 | dev->flush_domains = 0; | |
1473 | } | |
1474 | ||
1475 | return flush_domains; | |
1476 | } | |
1477 | ||
1478 | /** | |
1479 | * Pin an object to the GTT and evaluate the relocations landing in it. | |
1480 | */ | |
1481 | static int | |
1482 | i915_gem_object_pin_and_relocate(struct drm_gem_object *obj, | |
1483 | struct drm_file *file_priv, | |
1484 | struct drm_i915_gem_exec_object *entry) | |
1485 | { | |
1486 | struct drm_device *dev = obj->dev; | |
1487 | struct drm_i915_gem_relocation_entry reloc; | |
1488 | struct drm_i915_gem_relocation_entry __user *relocs; | |
1489 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1490 | int i, ret; | |
1491 | uint32_t last_reloc_offset = -1; | |
3043c60c | 1492 | void __iomem *reloc_page = NULL; |
673a394b EA |
1493 | |
1494 | /* Choose the GTT offset for our buffer and put it there. */ | |
1495 | ret = i915_gem_object_pin(obj, (uint32_t) entry->alignment); | |
1496 | if (ret) | |
1497 | return ret; | |
1498 | ||
1499 | entry->offset = obj_priv->gtt_offset; | |
1500 | ||
1501 | relocs = (struct drm_i915_gem_relocation_entry __user *) | |
1502 | (uintptr_t) entry->relocs_ptr; | |
1503 | /* Apply the relocations, using the GTT aperture to avoid cache | |
1504 | * flushing requirements. | |
1505 | */ | |
1506 | for (i = 0; i < entry->relocation_count; i++) { | |
1507 | struct drm_gem_object *target_obj; | |
1508 | struct drm_i915_gem_object *target_obj_priv; | |
3043c60c EA |
1509 | uint32_t reloc_val, reloc_offset; |
1510 | uint32_t __iomem *reloc_entry; | |
673a394b EA |
1511 | |
1512 | ret = copy_from_user(&reloc, relocs + i, sizeof(reloc)); | |
1513 | if (ret != 0) { | |
1514 | i915_gem_object_unpin(obj); | |
1515 | return ret; | |
1516 | } | |
1517 | ||
1518 | target_obj = drm_gem_object_lookup(obj->dev, file_priv, | |
1519 | reloc.target_handle); | |
1520 | if (target_obj == NULL) { | |
1521 | i915_gem_object_unpin(obj); | |
1522 | return -EBADF; | |
1523 | } | |
1524 | target_obj_priv = target_obj->driver_private; | |
1525 | ||
1526 | /* The target buffer should have appeared before us in the | |
1527 | * exec_object list, so it should have a GTT space bound by now. | |
1528 | */ | |
1529 | if (target_obj_priv->gtt_space == NULL) { | |
1530 | DRM_ERROR("No GTT space found for object %d\n", | |
1531 | reloc.target_handle); | |
1532 | drm_gem_object_unreference(target_obj); | |
1533 | i915_gem_object_unpin(obj); | |
1534 | return -EINVAL; | |
1535 | } | |
1536 | ||
1537 | if (reloc.offset > obj->size - 4) { | |
1538 | DRM_ERROR("Relocation beyond object bounds: " | |
1539 | "obj %p target %d offset %d size %d.\n", | |
1540 | obj, reloc.target_handle, | |
1541 | (int) reloc.offset, (int) obj->size); | |
1542 | drm_gem_object_unreference(target_obj); | |
1543 | i915_gem_object_unpin(obj); | |
1544 | return -EINVAL; | |
1545 | } | |
1546 | if (reloc.offset & 3) { | |
1547 | DRM_ERROR("Relocation not 4-byte aligned: " | |
1548 | "obj %p target %d offset %d.\n", | |
1549 | obj, reloc.target_handle, | |
1550 | (int) reloc.offset); | |
1551 | drm_gem_object_unreference(target_obj); | |
1552 | i915_gem_object_unpin(obj); | |
1553 | return -EINVAL; | |
1554 | } | |
1555 | ||
1556 | if (reloc.write_domain && target_obj->pending_write_domain && | |
1557 | reloc.write_domain != target_obj->pending_write_domain) { | |
1558 | DRM_ERROR("Write domain conflict: " | |
1559 | "obj %p target %d offset %d " | |
1560 | "new %08x old %08x\n", | |
1561 | obj, reloc.target_handle, | |
1562 | (int) reloc.offset, | |
1563 | reloc.write_domain, | |
1564 | target_obj->pending_write_domain); | |
1565 | drm_gem_object_unreference(target_obj); | |
1566 | i915_gem_object_unpin(obj); | |
1567 | return -EINVAL; | |
1568 | } | |
1569 | ||
1570 | #if WATCH_RELOC | |
1571 | DRM_INFO("%s: obj %p offset %08x target %d " | |
1572 | "read %08x write %08x gtt %08x " | |
1573 | "presumed %08x delta %08x\n", | |
1574 | __func__, | |
1575 | obj, | |
1576 | (int) reloc.offset, | |
1577 | (int) reloc.target_handle, | |
1578 | (int) reloc.read_domains, | |
1579 | (int) reloc.write_domain, | |
1580 | (int) target_obj_priv->gtt_offset, | |
1581 | (int) reloc.presumed_offset, | |
1582 | reloc.delta); | |
1583 | #endif | |
1584 | ||
1585 | target_obj->pending_read_domains |= reloc.read_domains; | |
1586 | target_obj->pending_write_domain |= reloc.write_domain; | |
1587 | ||
1588 | /* If the relocation already has the right value in it, no | |
1589 | * more work needs to be done. | |
1590 | */ | |
1591 | if (target_obj_priv->gtt_offset == reloc.presumed_offset) { | |
1592 | drm_gem_object_unreference(target_obj); | |
1593 | continue; | |
1594 | } | |
1595 | ||
1596 | /* Now that we're going to actually write some data in, | |
1597 | * make sure that any rendering using this buffer's contents | |
1598 | * is completed. | |
1599 | */ | |
1600 | i915_gem_object_wait_rendering(obj); | |
1601 | ||
1602 | /* As we're writing through the gtt, flush | |
1603 | * any CPU writes before we write the relocations | |
1604 | */ | |
1605 | if (obj->write_domain & I915_GEM_DOMAIN_CPU) { | |
1606 | i915_gem_clflush_object(obj); | |
1607 | drm_agp_chipset_flush(dev); | |
1608 | obj->write_domain = 0; | |
1609 | } | |
1610 | ||
1611 | /* Map the page containing the relocation we're going to | |
1612 | * perform. | |
1613 | */ | |
1614 | reloc_offset = obj_priv->gtt_offset + reloc.offset; | |
1615 | if (reloc_page == NULL || | |
1616 | (last_reloc_offset & ~(PAGE_SIZE - 1)) != | |
1617 | (reloc_offset & ~(PAGE_SIZE - 1))) { | |
1618 | if (reloc_page != NULL) | |
1619 | iounmap(reloc_page); | |
1620 | ||
bd88ee4c EA |
1621 | reloc_page = ioremap_wc(dev->agp->base + |
1622 | (reloc_offset & | |
1623 | ~(PAGE_SIZE - 1)), | |
1624 | PAGE_SIZE); | |
673a394b EA |
1625 | last_reloc_offset = reloc_offset; |
1626 | if (reloc_page == NULL) { | |
1627 | drm_gem_object_unreference(target_obj); | |
1628 | i915_gem_object_unpin(obj); | |
1629 | return -ENOMEM; | |
1630 | } | |
1631 | } | |
1632 | ||
3043c60c | 1633 | reloc_entry = (uint32_t __iomem *)(reloc_page + |
673a394b EA |
1634 | (reloc_offset & (PAGE_SIZE - 1))); |
1635 | reloc_val = target_obj_priv->gtt_offset + reloc.delta; | |
1636 | ||
1637 | #if WATCH_BUF | |
1638 | DRM_INFO("Applied relocation: %p@0x%08x %08x -> %08x\n", | |
1639 | obj, (unsigned int) reloc.offset, | |
1640 | readl(reloc_entry), reloc_val); | |
1641 | #endif | |
1642 | writel(reloc_val, reloc_entry); | |
1643 | ||
1644 | /* Write the updated presumed offset for this entry back out | |
1645 | * to the user. | |
1646 | */ | |
1647 | reloc.presumed_offset = target_obj_priv->gtt_offset; | |
1648 | ret = copy_to_user(relocs + i, &reloc, sizeof(reloc)); | |
1649 | if (ret != 0) { | |
1650 | drm_gem_object_unreference(target_obj); | |
1651 | i915_gem_object_unpin(obj); | |
1652 | return ret; | |
1653 | } | |
1654 | ||
1655 | drm_gem_object_unreference(target_obj); | |
1656 | } | |
1657 | ||
1658 | if (reloc_page != NULL) | |
1659 | iounmap(reloc_page); | |
1660 | ||
1661 | #if WATCH_BUF | |
1662 | if (0) | |
1663 | i915_gem_dump_object(obj, 128, __func__, ~0); | |
1664 | #endif | |
1665 | return 0; | |
1666 | } | |
1667 | ||
1668 | /** Dispatch a batchbuffer to the ring | |
1669 | */ | |
1670 | static int | |
1671 | i915_dispatch_gem_execbuffer(struct drm_device *dev, | |
1672 | struct drm_i915_gem_execbuffer *exec, | |
1673 | uint64_t exec_offset) | |
1674 | { | |
1675 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1676 | struct drm_clip_rect __user *boxes = (struct drm_clip_rect __user *) | |
1677 | (uintptr_t) exec->cliprects_ptr; | |
1678 | int nbox = exec->num_cliprects; | |
1679 | int i = 0, count; | |
1680 | uint32_t exec_start, exec_len; | |
1681 | RING_LOCALS; | |
1682 | ||
1683 | exec_start = (uint32_t) exec_offset + exec->batch_start_offset; | |
1684 | exec_len = (uint32_t) exec->batch_len; | |
1685 | ||
1686 | if ((exec_start | exec_len) & 0x7) { | |
1687 | DRM_ERROR("alignment\n"); | |
1688 | return -EINVAL; | |
1689 | } | |
1690 | ||
1691 | if (!exec_start) | |
1692 | return -EINVAL; | |
1693 | ||
1694 | count = nbox ? nbox : 1; | |
1695 | ||
1696 | for (i = 0; i < count; i++) { | |
1697 | if (i < nbox) { | |
1698 | int ret = i915_emit_box(dev, boxes, i, | |
1699 | exec->DR1, exec->DR4); | |
1700 | if (ret) | |
1701 | return ret; | |
1702 | } | |
1703 | ||
1704 | if (IS_I830(dev) || IS_845G(dev)) { | |
1705 | BEGIN_LP_RING(4); | |
1706 | OUT_RING(MI_BATCH_BUFFER); | |
1707 | OUT_RING(exec_start | MI_BATCH_NON_SECURE); | |
1708 | OUT_RING(exec_start + exec_len - 4); | |
1709 | OUT_RING(0); | |
1710 | ADVANCE_LP_RING(); | |
1711 | } else { | |
1712 | BEGIN_LP_RING(2); | |
1713 | if (IS_I965G(dev)) { | |
1714 | OUT_RING(MI_BATCH_BUFFER_START | | |
1715 | (2 << 6) | | |
1716 | MI_BATCH_NON_SECURE_I965); | |
1717 | OUT_RING(exec_start); | |
1718 | } else { | |
1719 | OUT_RING(MI_BATCH_BUFFER_START | | |
1720 | (2 << 6)); | |
1721 | OUT_RING(exec_start | MI_BATCH_NON_SECURE); | |
1722 | } | |
1723 | ADVANCE_LP_RING(); | |
1724 | } | |
1725 | } | |
1726 | ||
1727 | /* XXX breadcrumb */ | |
1728 | return 0; | |
1729 | } | |
1730 | ||
1731 | /* Throttle our rendering by waiting until the ring has completed our requests | |
1732 | * emitted over 20 msec ago. | |
1733 | * | |
1734 | * This should get us reasonable parallelism between CPU and GPU but also | |
1735 | * relatively low latency when blocking on a particular request to finish. | |
1736 | */ | |
1737 | static int | |
1738 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file_priv) | |
1739 | { | |
1740 | struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv; | |
1741 | int ret = 0; | |
1742 | uint32_t seqno; | |
1743 | ||
1744 | mutex_lock(&dev->struct_mutex); | |
1745 | seqno = i915_file_priv->mm.last_gem_throttle_seqno; | |
1746 | i915_file_priv->mm.last_gem_throttle_seqno = | |
1747 | i915_file_priv->mm.last_gem_seqno; | |
1748 | if (seqno) | |
1749 | ret = i915_wait_request(dev, seqno); | |
1750 | mutex_unlock(&dev->struct_mutex); | |
1751 | return ret; | |
1752 | } | |
1753 | ||
1754 | int | |
1755 | i915_gem_execbuffer(struct drm_device *dev, void *data, | |
1756 | struct drm_file *file_priv) | |
1757 | { | |
1758 | drm_i915_private_t *dev_priv = dev->dev_private; | |
1759 | struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv; | |
1760 | struct drm_i915_gem_execbuffer *args = data; | |
1761 | struct drm_i915_gem_exec_object *exec_list = NULL; | |
1762 | struct drm_gem_object **object_list = NULL; | |
1763 | struct drm_gem_object *batch_obj; | |
1764 | int ret, i, pinned = 0; | |
1765 | uint64_t exec_offset; | |
1766 | uint32_t seqno, flush_domains; | |
1767 | ||
1768 | #if WATCH_EXEC | |
1769 | DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n", | |
1770 | (int) args->buffers_ptr, args->buffer_count, args->batch_len); | |
1771 | #endif | |
1772 | ||
4f481ed2 EA |
1773 | if (args->buffer_count < 1) { |
1774 | DRM_ERROR("execbuf with %d buffers\n", args->buffer_count); | |
1775 | return -EINVAL; | |
1776 | } | |
673a394b EA |
1777 | /* Copy in the exec list from userland */ |
1778 | exec_list = drm_calloc(sizeof(*exec_list), args->buffer_count, | |
1779 | DRM_MEM_DRIVER); | |
1780 | object_list = drm_calloc(sizeof(*object_list), args->buffer_count, | |
1781 | DRM_MEM_DRIVER); | |
1782 | if (exec_list == NULL || object_list == NULL) { | |
1783 | DRM_ERROR("Failed to allocate exec or object list " | |
1784 | "for %d buffers\n", | |
1785 | args->buffer_count); | |
1786 | ret = -ENOMEM; | |
1787 | goto pre_mutex_err; | |
1788 | } | |
1789 | ret = copy_from_user(exec_list, | |
1790 | (struct drm_i915_relocation_entry __user *) | |
1791 | (uintptr_t) args->buffers_ptr, | |
1792 | sizeof(*exec_list) * args->buffer_count); | |
1793 | if (ret != 0) { | |
1794 | DRM_ERROR("copy %d exec entries failed %d\n", | |
1795 | args->buffer_count, ret); | |
1796 | goto pre_mutex_err; | |
1797 | } | |
1798 | ||
1799 | mutex_lock(&dev->struct_mutex); | |
1800 | ||
1801 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1802 | ||
1803 | if (dev_priv->mm.wedged) { | |
1804 | DRM_ERROR("Execbuf while wedged\n"); | |
1805 | mutex_unlock(&dev->struct_mutex); | |
1806 | return -EIO; | |
1807 | } | |
1808 | ||
1809 | if (dev_priv->mm.suspended) { | |
1810 | DRM_ERROR("Execbuf while VT-switched.\n"); | |
1811 | mutex_unlock(&dev->struct_mutex); | |
1812 | return -EBUSY; | |
1813 | } | |
1814 | ||
1815 | /* Zero the gloabl flush/invalidate flags. These | |
1816 | * will be modified as each object is bound to the | |
1817 | * gtt | |
1818 | */ | |
1819 | dev->invalidate_domains = 0; | |
1820 | dev->flush_domains = 0; | |
1821 | ||
1822 | /* Look up object handles and perform the relocations */ | |
1823 | for (i = 0; i < args->buffer_count; i++) { | |
1824 | object_list[i] = drm_gem_object_lookup(dev, file_priv, | |
1825 | exec_list[i].handle); | |
1826 | if (object_list[i] == NULL) { | |
1827 | DRM_ERROR("Invalid object handle %d at index %d\n", | |
1828 | exec_list[i].handle, i); | |
1829 | ret = -EBADF; | |
1830 | goto err; | |
1831 | } | |
1832 | ||
1833 | object_list[i]->pending_read_domains = 0; | |
1834 | object_list[i]->pending_write_domain = 0; | |
1835 | ret = i915_gem_object_pin_and_relocate(object_list[i], | |
1836 | file_priv, | |
1837 | &exec_list[i]); | |
1838 | if (ret) { | |
1839 | DRM_ERROR("object bind and relocate failed %d\n", ret); | |
1840 | goto err; | |
1841 | } | |
1842 | pinned = i + 1; | |
1843 | } | |
1844 | ||
1845 | /* Set the pending read domains for the batch buffer to COMMAND */ | |
1846 | batch_obj = object_list[args->buffer_count-1]; | |
1847 | batch_obj->pending_read_domains = I915_GEM_DOMAIN_COMMAND; | |
1848 | batch_obj->pending_write_domain = 0; | |
1849 | ||
1850 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1851 | ||
1852 | for (i = 0; i < args->buffer_count; i++) { | |
1853 | struct drm_gem_object *obj = object_list[i]; | |
1854 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1855 | ||
1856 | if (obj_priv->gtt_space == NULL) { | |
1857 | /* We evicted the buffer in the process of validating | |
1858 | * our set of buffers in. We could try to recover by | |
1859 | * kicking them everything out and trying again from | |
1860 | * the start. | |
1861 | */ | |
1862 | ret = -ENOMEM; | |
1863 | goto err; | |
1864 | } | |
1865 | ||
1866 | /* make sure all previous memory operations have passed */ | |
1867 | ret = i915_gem_object_set_domain(obj, | |
1868 | obj->pending_read_domains, | |
1869 | obj->pending_write_domain); | |
1870 | if (ret) | |
1871 | goto err; | |
1872 | } | |
1873 | ||
1874 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1875 | ||
1876 | /* Flush/invalidate caches and chipset buffer */ | |
1877 | flush_domains = i915_gem_dev_set_domain(dev); | |
1878 | ||
1879 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1880 | ||
1881 | #if WATCH_COHERENCY | |
1882 | for (i = 0; i < args->buffer_count; i++) { | |
1883 | i915_gem_object_check_coherency(object_list[i], | |
1884 | exec_list[i].handle); | |
1885 | } | |
1886 | #endif | |
1887 | ||
1888 | exec_offset = exec_list[args->buffer_count - 1].offset; | |
1889 | ||
1890 | #if WATCH_EXEC | |
1891 | i915_gem_dump_object(object_list[args->buffer_count - 1], | |
1892 | args->batch_len, | |
1893 | __func__, | |
1894 | ~0); | |
1895 | #endif | |
1896 | ||
1897 | (void)i915_add_request(dev, flush_domains); | |
1898 | ||
1899 | /* Exec the batchbuffer */ | |
1900 | ret = i915_dispatch_gem_execbuffer(dev, args, exec_offset); | |
1901 | if (ret) { | |
1902 | DRM_ERROR("dispatch failed %d\n", ret); | |
1903 | goto err; | |
1904 | } | |
1905 | ||
1906 | /* | |
1907 | * Ensure that the commands in the batch buffer are | |
1908 | * finished before the interrupt fires | |
1909 | */ | |
1910 | flush_domains = i915_retire_commands(dev); | |
1911 | ||
1912 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1913 | ||
1914 | /* | |
1915 | * Get a seqno representing the execution of the current buffer, | |
1916 | * which we can wait on. We would like to mitigate these interrupts, | |
1917 | * likely by only creating seqnos occasionally (so that we have | |
1918 | * *some* interrupts representing completion of buffers that we can | |
1919 | * wait on when trying to clear up gtt space). | |
1920 | */ | |
1921 | seqno = i915_add_request(dev, flush_domains); | |
1922 | BUG_ON(seqno == 0); | |
1923 | i915_file_priv->mm.last_gem_seqno = seqno; | |
1924 | for (i = 0; i < args->buffer_count; i++) { | |
1925 | struct drm_gem_object *obj = object_list[i]; | |
1926 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1927 | ||
1928 | i915_gem_object_move_to_active(obj); | |
1929 | obj_priv->last_rendering_seqno = seqno; | |
1930 | #if WATCH_LRU | |
1931 | DRM_INFO("%s: move to exec list %p\n", __func__, obj); | |
1932 | #endif | |
1933 | } | |
1934 | #if WATCH_LRU | |
1935 | i915_dump_lru(dev, __func__); | |
1936 | #endif | |
1937 | ||
1938 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1939 | ||
1940 | /* Copy the new buffer offsets back to the user's exec list. */ | |
1941 | ret = copy_to_user((struct drm_i915_relocation_entry __user *) | |
1942 | (uintptr_t) args->buffers_ptr, | |
1943 | exec_list, | |
1944 | sizeof(*exec_list) * args->buffer_count); | |
1945 | if (ret) | |
1946 | DRM_ERROR("failed to copy %d exec entries " | |
1947 | "back to user (%d)\n", | |
1948 | args->buffer_count, ret); | |
1949 | err: | |
1950 | if (object_list != NULL) { | |
1951 | for (i = 0; i < pinned; i++) | |
1952 | i915_gem_object_unpin(object_list[i]); | |
1953 | ||
1954 | for (i = 0; i < args->buffer_count; i++) | |
1955 | drm_gem_object_unreference(object_list[i]); | |
1956 | } | |
1957 | mutex_unlock(&dev->struct_mutex); | |
1958 | ||
1959 | pre_mutex_err: | |
1960 | drm_free(object_list, sizeof(*object_list) * args->buffer_count, | |
1961 | DRM_MEM_DRIVER); | |
1962 | drm_free(exec_list, sizeof(*exec_list) * args->buffer_count, | |
1963 | DRM_MEM_DRIVER); | |
1964 | ||
1965 | return ret; | |
1966 | } | |
1967 | ||
1968 | int | |
1969 | i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment) | |
1970 | { | |
1971 | struct drm_device *dev = obj->dev; | |
1972 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
1973 | int ret; | |
1974 | ||
1975 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1976 | if (obj_priv->gtt_space == NULL) { | |
1977 | ret = i915_gem_object_bind_to_gtt(obj, alignment); | |
1978 | if (ret != 0) { | |
1979 | DRM_ERROR("Failure to bind: %d", ret); | |
1980 | return ret; | |
1981 | } | |
1982 | } | |
1983 | obj_priv->pin_count++; | |
1984 | ||
1985 | /* If the object is not active and not pending a flush, | |
1986 | * remove it from the inactive list | |
1987 | */ | |
1988 | if (obj_priv->pin_count == 1) { | |
1989 | atomic_inc(&dev->pin_count); | |
1990 | atomic_add(obj->size, &dev->pin_memory); | |
1991 | if (!obj_priv->active && | |
1992 | (obj->write_domain & ~(I915_GEM_DOMAIN_CPU | | |
1993 | I915_GEM_DOMAIN_GTT)) == 0 && | |
1994 | !list_empty(&obj_priv->list)) | |
1995 | list_del_init(&obj_priv->list); | |
1996 | } | |
1997 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
1998 | ||
1999 | return 0; | |
2000 | } | |
2001 | ||
2002 | void | |
2003 | i915_gem_object_unpin(struct drm_gem_object *obj) | |
2004 | { | |
2005 | struct drm_device *dev = obj->dev; | |
2006 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2007 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2008 | ||
2009 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
2010 | obj_priv->pin_count--; | |
2011 | BUG_ON(obj_priv->pin_count < 0); | |
2012 | BUG_ON(obj_priv->gtt_space == NULL); | |
2013 | ||
2014 | /* If the object is no longer pinned, and is | |
2015 | * neither active nor being flushed, then stick it on | |
2016 | * the inactive list | |
2017 | */ | |
2018 | if (obj_priv->pin_count == 0) { | |
2019 | if (!obj_priv->active && | |
2020 | (obj->write_domain & ~(I915_GEM_DOMAIN_CPU | | |
2021 | I915_GEM_DOMAIN_GTT)) == 0) | |
2022 | list_move_tail(&obj_priv->list, | |
2023 | &dev_priv->mm.inactive_list); | |
2024 | atomic_dec(&dev->pin_count); | |
2025 | atomic_sub(obj->size, &dev->pin_memory); | |
2026 | } | |
2027 | i915_verify_inactive(dev, __FILE__, __LINE__); | |
2028 | } | |
2029 | ||
2030 | int | |
2031 | i915_gem_pin_ioctl(struct drm_device *dev, void *data, | |
2032 | struct drm_file *file_priv) | |
2033 | { | |
2034 | struct drm_i915_gem_pin *args = data; | |
2035 | struct drm_gem_object *obj; | |
2036 | struct drm_i915_gem_object *obj_priv; | |
2037 | int ret; | |
2038 | ||
2039 | mutex_lock(&dev->struct_mutex); | |
2040 | ||
2041 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
2042 | if (obj == NULL) { | |
2043 | DRM_ERROR("Bad handle in i915_gem_pin_ioctl(): %d\n", | |
2044 | args->handle); | |
2045 | mutex_unlock(&dev->struct_mutex); | |
2046 | return -EBADF; | |
2047 | } | |
2048 | obj_priv = obj->driver_private; | |
2049 | ||
2050 | ret = i915_gem_object_pin(obj, args->alignment); | |
2051 | if (ret != 0) { | |
2052 | drm_gem_object_unreference(obj); | |
2053 | mutex_unlock(&dev->struct_mutex); | |
2054 | return ret; | |
2055 | } | |
2056 | ||
2057 | /* XXX - flush the CPU caches for pinned objects | |
2058 | * as the X server doesn't manage domains yet | |
2059 | */ | |
2060 | if (obj->write_domain & I915_GEM_DOMAIN_CPU) { | |
2061 | i915_gem_clflush_object(obj); | |
2062 | drm_agp_chipset_flush(dev); | |
2063 | obj->write_domain = 0; | |
2064 | } | |
2065 | args->offset = obj_priv->gtt_offset; | |
2066 | drm_gem_object_unreference(obj); | |
2067 | mutex_unlock(&dev->struct_mutex); | |
2068 | ||
2069 | return 0; | |
2070 | } | |
2071 | ||
2072 | int | |
2073 | i915_gem_unpin_ioctl(struct drm_device *dev, void *data, | |
2074 | struct drm_file *file_priv) | |
2075 | { | |
2076 | struct drm_i915_gem_pin *args = data; | |
2077 | struct drm_gem_object *obj; | |
2078 | ||
2079 | mutex_lock(&dev->struct_mutex); | |
2080 | ||
2081 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
2082 | if (obj == NULL) { | |
2083 | DRM_ERROR("Bad handle in i915_gem_unpin_ioctl(): %d\n", | |
2084 | args->handle); | |
2085 | mutex_unlock(&dev->struct_mutex); | |
2086 | return -EBADF; | |
2087 | } | |
2088 | ||
2089 | i915_gem_object_unpin(obj); | |
2090 | ||
2091 | drm_gem_object_unreference(obj); | |
2092 | mutex_unlock(&dev->struct_mutex); | |
2093 | return 0; | |
2094 | } | |
2095 | ||
2096 | int | |
2097 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, | |
2098 | struct drm_file *file_priv) | |
2099 | { | |
2100 | struct drm_i915_gem_busy *args = data; | |
2101 | struct drm_gem_object *obj; | |
2102 | struct drm_i915_gem_object *obj_priv; | |
2103 | ||
2104 | mutex_lock(&dev->struct_mutex); | |
2105 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); | |
2106 | if (obj == NULL) { | |
2107 | DRM_ERROR("Bad handle in i915_gem_busy_ioctl(): %d\n", | |
2108 | args->handle); | |
2109 | mutex_unlock(&dev->struct_mutex); | |
2110 | return -EBADF; | |
2111 | } | |
2112 | ||
2113 | obj_priv = obj->driver_private; | |
2114 | args->busy = obj_priv->active; | |
2115 | ||
2116 | drm_gem_object_unreference(obj); | |
2117 | mutex_unlock(&dev->struct_mutex); | |
2118 | return 0; | |
2119 | } | |
2120 | ||
2121 | int | |
2122 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, | |
2123 | struct drm_file *file_priv) | |
2124 | { | |
2125 | return i915_gem_ring_throttle(dev, file_priv); | |
2126 | } | |
2127 | ||
2128 | int i915_gem_init_object(struct drm_gem_object *obj) | |
2129 | { | |
2130 | struct drm_i915_gem_object *obj_priv; | |
2131 | ||
2132 | obj_priv = drm_calloc(1, sizeof(*obj_priv), DRM_MEM_DRIVER); | |
2133 | if (obj_priv == NULL) | |
2134 | return -ENOMEM; | |
2135 | ||
2136 | /* | |
2137 | * We've just allocated pages from the kernel, | |
2138 | * so they've just been written by the CPU with | |
2139 | * zeros. They'll need to be clflushed before we | |
2140 | * use them with the GPU. | |
2141 | */ | |
2142 | obj->write_domain = I915_GEM_DOMAIN_CPU; | |
2143 | obj->read_domains = I915_GEM_DOMAIN_CPU; | |
2144 | ||
2145 | obj->driver_private = obj_priv; | |
2146 | obj_priv->obj = obj; | |
2147 | INIT_LIST_HEAD(&obj_priv->list); | |
2148 | return 0; | |
2149 | } | |
2150 | ||
2151 | void i915_gem_free_object(struct drm_gem_object *obj) | |
2152 | { | |
2153 | struct drm_i915_gem_object *obj_priv = obj->driver_private; | |
2154 | ||
2155 | while (obj_priv->pin_count > 0) | |
2156 | i915_gem_object_unpin(obj); | |
2157 | ||
2158 | i915_gem_object_unbind(obj); | |
2159 | ||
2160 | drm_free(obj_priv->page_cpu_valid, 1, DRM_MEM_DRIVER); | |
2161 | drm_free(obj->driver_private, 1, DRM_MEM_DRIVER); | |
2162 | } | |
2163 | ||
2164 | static int | |
2165 | i915_gem_set_domain(struct drm_gem_object *obj, | |
2166 | struct drm_file *file_priv, | |
2167 | uint32_t read_domains, | |
2168 | uint32_t write_domain) | |
2169 | { | |
2170 | struct drm_device *dev = obj->dev; | |
2171 | int ret; | |
2172 | uint32_t flush_domains; | |
2173 | ||
2174 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); | |
2175 | ||
2176 | ret = i915_gem_object_set_domain(obj, read_domains, write_domain); | |
2177 | if (ret) | |
2178 | return ret; | |
2179 | flush_domains = i915_gem_dev_set_domain(obj->dev); | |
2180 | ||
2181 | if (flush_domains & ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT)) | |
2182 | (void) i915_add_request(dev, flush_domains); | |
2183 | ||
2184 | return 0; | |
2185 | } | |
2186 | ||
2187 | /** Unbinds all objects that are on the given buffer list. */ | |
2188 | static int | |
2189 | i915_gem_evict_from_list(struct drm_device *dev, struct list_head *head) | |
2190 | { | |
2191 | struct drm_gem_object *obj; | |
2192 | struct drm_i915_gem_object *obj_priv; | |
2193 | int ret; | |
2194 | ||
2195 | while (!list_empty(head)) { | |
2196 | obj_priv = list_first_entry(head, | |
2197 | struct drm_i915_gem_object, | |
2198 | list); | |
2199 | obj = obj_priv->obj; | |
2200 | ||
2201 | if (obj_priv->pin_count != 0) { | |
2202 | DRM_ERROR("Pinned object in unbind list\n"); | |
2203 | mutex_unlock(&dev->struct_mutex); | |
2204 | return -EINVAL; | |
2205 | } | |
2206 | ||
2207 | ret = i915_gem_object_unbind(obj); | |
2208 | if (ret != 0) { | |
2209 | DRM_ERROR("Error unbinding object in LeaveVT: %d\n", | |
2210 | ret); | |
2211 | mutex_unlock(&dev->struct_mutex); | |
2212 | return ret; | |
2213 | } | |
2214 | } | |
2215 | ||
2216 | ||
2217 | return 0; | |
2218 | } | |
2219 | ||
2220 | static int | |
2221 | i915_gem_idle(struct drm_device *dev) | |
2222 | { | |
2223 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2224 | uint32_t seqno, cur_seqno, last_seqno; | |
2225 | int stuck, ret; | |
2226 | ||
2227 | if (dev_priv->mm.suspended) | |
2228 | return 0; | |
2229 | ||
2230 | /* Hack! Don't let anybody do execbuf while we don't control the chip. | |
2231 | * We need to replace this with a semaphore, or something. | |
2232 | */ | |
2233 | dev_priv->mm.suspended = 1; | |
2234 | ||
2235 | i915_kernel_lost_context(dev); | |
2236 | ||
2237 | /* Flush the GPU along with all non-CPU write domains | |
2238 | */ | |
2239 | i915_gem_flush(dev, ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT), | |
2240 | ~(I915_GEM_DOMAIN_CPU|I915_GEM_DOMAIN_GTT)); | |
2241 | seqno = i915_add_request(dev, ~(I915_GEM_DOMAIN_CPU | | |
2242 | I915_GEM_DOMAIN_GTT)); | |
2243 | ||
2244 | if (seqno == 0) { | |
2245 | mutex_unlock(&dev->struct_mutex); | |
2246 | return -ENOMEM; | |
2247 | } | |
2248 | ||
2249 | dev_priv->mm.waiting_gem_seqno = seqno; | |
2250 | last_seqno = 0; | |
2251 | stuck = 0; | |
2252 | for (;;) { | |
2253 | cur_seqno = i915_get_gem_seqno(dev); | |
2254 | if (i915_seqno_passed(cur_seqno, seqno)) | |
2255 | break; | |
2256 | if (last_seqno == cur_seqno) { | |
2257 | if (stuck++ > 100) { | |
2258 | DRM_ERROR("hardware wedged\n"); | |
2259 | dev_priv->mm.wedged = 1; | |
2260 | DRM_WAKEUP(&dev_priv->irq_queue); | |
2261 | break; | |
2262 | } | |
2263 | } | |
2264 | msleep(10); | |
2265 | last_seqno = cur_seqno; | |
2266 | } | |
2267 | dev_priv->mm.waiting_gem_seqno = 0; | |
2268 | ||
2269 | i915_gem_retire_requests(dev); | |
2270 | ||
2271 | /* Active and flushing should now be empty as we've | |
2272 | * waited for a sequence higher than any pending execbuffer | |
2273 | */ | |
2274 | BUG_ON(!list_empty(&dev_priv->mm.active_list)); | |
2275 | BUG_ON(!list_empty(&dev_priv->mm.flushing_list)); | |
2276 | ||
2277 | /* Request should now be empty as we've also waited | |
2278 | * for the last request in the list | |
2279 | */ | |
2280 | BUG_ON(!list_empty(&dev_priv->mm.request_list)); | |
2281 | ||
2282 | /* Move all buffers out of the GTT. */ | |
2283 | ret = i915_gem_evict_from_list(dev, &dev_priv->mm.inactive_list); | |
2284 | if (ret) | |
2285 | return ret; | |
2286 | ||
2287 | BUG_ON(!list_empty(&dev_priv->mm.active_list)); | |
2288 | BUG_ON(!list_empty(&dev_priv->mm.flushing_list)); | |
2289 | BUG_ON(!list_empty(&dev_priv->mm.inactive_list)); | |
2290 | BUG_ON(!list_empty(&dev_priv->mm.request_list)); | |
2291 | return 0; | |
2292 | } | |
2293 | ||
2294 | static int | |
2295 | i915_gem_init_hws(struct drm_device *dev) | |
2296 | { | |
2297 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2298 | struct drm_gem_object *obj; | |
2299 | struct drm_i915_gem_object *obj_priv; | |
2300 | int ret; | |
2301 | ||
2302 | /* If we need a physical address for the status page, it's already | |
2303 | * initialized at driver load time. | |
2304 | */ | |
2305 | if (!I915_NEED_GFX_HWS(dev)) | |
2306 | return 0; | |
2307 | ||
2308 | obj = drm_gem_object_alloc(dev, 4096); | |
2309 | if (obj == NULL) { | |
2310 | DRM_ERROR("Failed to allocate status page\n"); | |
2311 | return -ENOMEM; | |
2312 | } | |
2313 | obj_priv = obj->driver_private; | |
2314 | ||
2315 | ret = i915_gem_object_pin(obj, 4096); | |
2316 | if (ret != 0) { | |
2317 | drm_gem_object_unreference(obj); | |
2318 | return ret; | |
2319 | } | |
2320 | ||
2321 | dev_priv->status_gfx_addr = obj_priv->gtt_offset; | |
2322 | dev_priv->hws_map.offset = dev->agp->base + obj_priv->gtt_offset; | |
2323 | dev_priv->hws_map.size = 4096; | |
2324 | dev_priv->hws_map.type = 0; | |
2325 | dev_priv->hws_map.flags = 0; | |
2326 | dev_priv->hws_map.mtrr = 0; | |
2327 | ||
bd88ee4c EA |
2328 | /* Ioremapping here is the wrong thing to do. We want cached access. |
2329 | */ | |
2330 | drm_core_ioremap_wc(&dev_priv->hws_map, dev); | |
673a394b EA |
2331 | if (dev_priv->hws_map.handle == NULL) { |
2332 | DRM_ERROR("Failed to map status page.\n"); | |
2333 | memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); | |
2334 | drm_gem_object_unreference(obj); | |
2335 | return -EINVAL; | |
2336 | } | |
2337 | dev_priv->hws_obj = obj; | |
2338 | dev_priv->hw_status_page = dev_priv->hws_map.handle; | |
2339 | memset(dev_priv->hw_status_page, 0, PAGE_SIZE); | |
2340 | I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr); | |
2341 | DRM_DEBUG("hws offset: 0x%08x\n", dev_priv->status_gfx_addr); | |
2342 | ||
2343 | return 0; | |
2344 | } | |
2345 | ||
2346 | static int | |
2347 | i915_gem_init_ringbuffer(struct drm_device *dev) | |
2348 | { | |
2349 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2350 | struct drm_gem_object *obj; | |
2351 | struct drm_i915_gem_object *obj_priv; | |
2352 | int ret; | |
2353 | ||
2354 | ret = i915_gem_init_hws(dev); | |
2355 | if (ret != 0) | |
2356 | return ret; | |
2357 | ||
2358 | obj = drm_gem_object_alloc(dev, 128 * 1024); | |
2359 | if (obj == NULL) { | |
2360 | DRM_ERROR("Failed to allocate ringbuffer\n"); | |
2361 | return -ENOMEM; | |
2362 | } | |
2363 | obj_priv = obj->driver_private; | |
2364 | ||
2365 | ret = i915_gem_object_pin(obj, 4096); | |
2366 | if (ret != 0) { | |
2367 | drm_gem_object_unreference(obj); | |
2368 | return ret; | |
2369 | } | |
2370 | ||
2371 | /* Set up the kernel mapping for the ring. */ | |
2372 | dev_priv->ring.Size = obj->size; | |
2373 | dev_priv->ring.tail_mask = obj->size - 1; | |
2374 | ||
2375 | dev_priv->ring.map.offset = dev->agp->base + obj_priv->gtt_offset; | |
2376 | dev_priv->ring.map.size = obj->size; | |
2377 | dev_priv->ring.map.type = 0; | |
2378 | dev_priv->ring.map.flags = 0; | |
2379 | dev_priv->ring.map.mtrr = 0; | |
2380 | ||
bd88ee4c | 2381 | drm_core_ioremap_wc(&dev_priv->ring.map, dev); |
673a394b EA |
2382 | if (dev_priv->ring.map.handle == NULL) { |
2383 | DRM_ERROR("Failed to map ringbuffer.\n"); | |
2384 | memset(&dev_priv->ring, 0, sizeof(dev_priv->ring)); | |
2385 | drm_gem_object_unreference(obj); | |
2386 | return -EINVAL; | |
2387 | } | |
2388 | dev_priv->ring.ring_obj = obj; | |
2389 | dev_priv->ring.virtual_start = dev_priv->ring.map.handle; | |
2390 | ||
2391 | /* Stop the ring if it's running. */ | |
2392 | I915_WRITE(PRB0_CTL, 0); | |
2393 | I915_WRITE(PRB0_HEAD, 0); | |
2394 | I915_WRITE(PRB0_TAIL, 0); | |
2395 | I915_WRITE(PRB0_START, 0); | |
2396 | ||
2397 | /* Initialize the ring. */ | |
2398 | I915_WRITE(PRB0_START, obj_priv->gtt_offset); | |
2399 | I915_WRITE(PRB0_CTL, | |
2400 | ((obj->size - 4096) & RING_NR_PAGES) | | |
2401 | RING_NO_REPORT | | |
2402 | RING_VALID); | |
2403 | ||
2404 | /* Update our cache of the ring state */ | |
2405 | i915_kernel_lost_context(dev); | |
2406 | ||
2407 | return 0; | |
2408 | } | |
2409 | ||
2410 | static void | |
2411 | i915_gem_cleanup_ringbuffer(struct drm_device *dev) | |
2412 | { | |
2413 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2414 | ||
2415 | if (dev_priv->ring.ring_obj == NULL) | |
2416 | return; | |
2417 | ||
2418 | drm_core_ioremapfree(&dev_priv->ring.map, dev); | |
2419 | ||
2420 | i915_gem_object_unpin(dev_priv->ring.ring_obj); | |
2421 | drm_gem_object_unreference(dev_priv->ring.ring_obj); | |
2422 | dev_priv->ring.ring_obj = NULL; | |
2423 | memset(&dev_priv->ring, 0, sizeof(dev_priv->ring)); | |
2424 | ||
2425 | if (dev_priv->hws_obj != NULL) { | |
2426 | i915_gem_object_unpin(dev_priv->hws_obj); | |
2427 | drm_gem_object_unreference(dev_priv->hws_obj); | |
2428 | dev_priv->hws_obj = NULL; | |
2429 | memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); | |
2430 | ||
2431 | /* Write high address into HWS_PGA when disabling. */ | |
2432 | I915_WRITE(HWS_PGA, 0x1ffff000); | |
2433 | } | |
2434 | } | |
2435 | ||
2436 | int | |
2437 | i915_gem_entervt_ioctl(struct drm_device *dev, void *data, | |
2438 | struct drm_file *file_priv) | |
2439 | { | |
2440 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2441 | int ret; | |
2442 | ||
2443 | if (dev_priv->mm.wedged) { | |
2444 | DRM_ERROR("Reenabling wedged hardware, good luck\n"); | |
2445 | dev_priv->mm.wedged = 0; | |
2446 | } | |
2447 | ||
2448 | ret = i915_gem_init_ringbuffer(dev); | |
2449 | if (ret != 0) | |
2450 | return ret; | |
2451 | ||
2452 | mutex_lock(&dev->struct_mutex); | |
2453 | BUG_ON(!list_empty(&dev_priv->mm.active_list)); | |
2454 | BUG_ON(!list_empty(&dev_priv->mm.flushing_list)); | |
2455 | BUG_ON(!list_empty(&dev_priv->mm.inactive_list)); | |
2456 | BUG_ON(!list_empty(&dev_priv->mm.request_list)); | |
2457 | dev_priv->mm.suspended = 0; | |
2458 | mutex_unlock(&dev->struct_mutex); | |
dbb19d30 KH |
2459 | |
2460 | drm_irq_install(dev); | |
2461 | ||
673a394b EA |
2462 | return 0; |
2463 | } | |
2464 | ||
2465 | int | |
2466 | i915_gem_leavevt_ioctl(struct drm_device *dev, void *data, | |
2467 | struct drm_file *file_priv) | |
2468 | { | |
2469 | int ret; | |
2470 | ||
2471 | mutex_lock(&dev->struct_mutex); | |
2472 | ret = i915_gem_idle(dev); | |
2473 | if (ret == 0) | |
2474 | i915_gem_cleanup_ringbuffer(dev); | |
2475 | mutex_unlock(&dev->struct_mutex); | |
2476 | ||
dbb19d30 KH |
2477 | drm_irq_uninstall(dev); |
2478 | ||
673a394b EA |
2479 | return 0; |
2480 | } | |
2481 | ||
2482 | void | |
2483 | i915_gem_lastclose(struct drm_device *dev) | |
2484 | { | |
2485 | int ret; | |
2486 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2487 | ||
2488 | mutex_lock(&dev->struct_mutex); | |
2489 | ||
2490 | if (dev_priv->ring.ring_obj != NULL) { | |
2491 | ret = i915_gem_idle(dev); | |
2492 | if (ret) | |
2493 | DRM_ERROR("failed to idle hardware: %d\n", ret); | |
2494 | ||
2495 | i915_gem_cleanup_ringbuffer(dev); | |
2496 | } | |
2497 | ||
2498 | mutex_unlock(&dev->struct_mutex); | |
2499 | } | |
2500 | ||
2501 | void | |
2502 | i915_gem_load(struct drm_device *dev) | |
2503 | { | |
2504 | drm_i915_private_t *dev_priv = dev->dev_private; | |
2505 | ||
2506 | INIT_LIST_HEAD(&dev_priv->mm.active_list); | |
2507 | INIT_LIST_HEAD(&dev_priv->mm.flushing_list); | |
2508 | INIT_LIST_HEAD(&dev_priv->mm.inactive_list); | |
2509 | INIT_LIST_HEAD(&dev_priv->mm.request_list); | |
2510 | INIT_DELAYED_WORK(&dev_priv->mm.retire_work, | |
2511 | i915_gem_retire_work_handler); | |
546b0974 EA |
2512 | INIT_WORK(&dev_priv->mm.vblank_work, |
2513 | i915_gem_vblank_work_handler); | |
673a394b EA |
2514 | dev_priv->mm.next_gem_seqno = 1; |
2515 | ||
2516 | i915_gem_detect_bit_6_swizzle(dev); | |
2517 | } |