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Commit | Line | Data |
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673a394b | 1 | /* |
be6a0376 | 2 | * Copyright © 2008-2015 Intel Corporation |
673a394b EA |
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 | ||
760285e7 | 28 | #include <drm/drmP.h> |
0de23977 | 29 | #include <drm/drm_vma_manager.h> |
760285e7 | 30 | #include <drm/i915_drm.h> |
673a394b | 31 | #include "i915_drv.h" |
57822dc6 | 32 | #include "i915_gem_clflush.h" |
eb82289a | 33 | #include "i915_vgpu.h" |
1c5d22f7 | 34 | #include "i915_trace.h" |
652c393a | 35 | #include "intel_drv.h" |
5d723d7a | 36 | #include "intel_frontbuffer.h" |
0ccdacf6 | 37 | #include "intel_mocs.h" |
465c403c | 38 | #include "i915_gemfs.h" |
6b5e90f5 | 39 | #include <linux/dma-fence-array.h> |
fe3288b5 | 40 | #include <linux/kthread.h> |
c13d87ea | 41 | #include <linux/reservation.h> |
5949eac4 | 42 | #include <linux/shmem_fs.h> |
5a0e3ad6 | 43 | #include <linux/slab.h> |
20e4933c | 44 | #include <linux/stop_machine.h> |
673a394b | 45 | #include <linux/swap.h> |
79e53945 | 46 | #include <linux/pci.h> |
1286ff73 | 47 | #include <linux/dma-buf.h> |
673a394b | 48 | |
fbbd37b3 | 49 | static void i915_gem_flush_free_objects(struct drm_i915_private *i915); |
61050808 | 50 | |
2c22569b CW |
51 | static bool cpu_write_needs_clflush(struct drm_i915_gem_object *obj) |
52 | { | |
e27ab73d | 53 | if (obj->cache_dirty) |
b50a5371 AS |
54 | return false; |
55 | ||
b8f55be6 | 56 | if (!(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE)) |
2c22569b CW |
57 | return true; |
58 | ||
bd3d2252 | 59 | return obj->pin_global; /* currently in use by HW, keep flushed */ |
2c22569b CW |
60 | } |
61 | ||
4f1959ee | 62 | static int |
bb6dc8d9 | 63 | insert_mappable_node(struct i915_ggtt *ggtt, |
4f1959ee AS |
64 | struct drm_mm_node *node, u32 size) |
65 | { | |
66 | memset(node, 0, sizeof(*node)); | |
4e64e553 CW |
67 | return drm_mm_insert_node_in_range(&ggtt->base.mm, node, |
68 | size, 0, I915_COLOR_UNEVICTABLE, | |
69 | 0, ggtt->mappable_end, | |
70 | DRM_MM_INSERT_LOW); | |
4f1959ee AS |
71 | } |
72 | ||
73 | static void | |
74 | remove_mappable_node(struct drm_mm_node *node) | |
75 | { | |
76 | drm_mm_remove_node(node); | |
77 | } | |
78 | ||
73aa808f CW |
79 | /* some bookkeeping */ |
80 | static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv, | |
3ef7f228 | 81 | u64 size) |
73aa808f | 82 | { |
c20e8355 | 83 | spin_lock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
84 | dev_priv->mm.object_count++; |
85 | dev_priv->mm.object_memory += size; | |
c20e8355 | 86 | spin_unlock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
87 | } |
88 | ||
89 | static void i915_gem_info_remove_obj(struct drm_i915_private *dev_priv, | |
3ef7f228 | 90 | u64 size) |
73aa808f | 91 | { |
c20e8355 | 92 | spin_lock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
93 | dev_priv->mm.object_count--; |
94 | dev_priv->mm.object_memory -= size; | |
c20e8355 | 95 | spin_unlock(&dev_priv->mm.object_stat_lock); |
73aa808f CW |
96 | } |
97 | ||
21dd3734 | 98 | static int |
33196ded | 99 | i915_gem_wait_for_error(struct i915_gpu_error *error) |
30dbf0c0 | 100 | { |
30dbf0c0 CW |
101 | int ret; |
102 | ||
4c7d62c6 CW |
103 | might_sleep(); |
104 | ||
0a6759c6 DV |
105 | /* |
106 | * Only wait 10 seconds for the gpu reset to complete to avoid hanging | |
107 | * userspace. If it takes that long something really bad is going on and | |
108 | * we should simply try to bail out and fail as gracefully as possible. | |
109 | */ | |
1f83fee0 | 110 | ret = wait_event_interruptible_timeout(error->reset_queue, |
8c185eca | 111 | !i915_reset_backoff(error), |
b52992c0 | 112 | I915_RESET_TIMEOUT); |
0a6759c6 DV |
113 | if (ret == 0) { |
114 | DRM_ERROR("Timed out waiting for the gpu reset to complete\n"); | |
115 | return -EIO; | |
116 | } else if (ret < 0) { | |
30dbf0c0 | 117 | return ret; |
d98c52cf CW |
118 | } else { |
119 | return 0; | |
0a6759c6 | 120 | } |
30dbf0c0 CW |
121 | } |
122 | ||
54cf91dc | 123 | int i915_mutex_lock_interruptible(struct drm_device *dev) |
76c1dec1 | 124 | { |
fac5e23e | 125 | struct drm_i915_private *dev_priv = to_i915(dev); |
76c1dec1 CW |
126 | int ret; |
127 | ||
33196ded | 128 | ret = i915_gem_wait_for_error(&dev_priv->gpu_error); |
76c1dec1 CW |
129 | if (ret) |
130 | return ret; | |
131 | ||
132 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
133 | if (ret) | |
134 | return ret; | |
135 | ||
76c1dec1 CW |
136 | return 0; |
137 | } | |
30dbf0c0 | 138 | |
5a125c3c EA |
139 | int |
140 | i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 141 | struct drm_file *file) |
5a125c3c | 142 | { |
72e96d64 | 143 | struct drm_i915_private *dev_priv = to_i915(dev); |
62106b4f | 144 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
72e96d64 | 145 | struct drm_i915_gem_get_aperture *args = data; |
ca1543be | 146 | struct i915_vma *vma; |
ff8f7975 | 147 | u64 pinned; |
5a125c3c | 148 | |
ff8f7975 | 149 | pinned = ggtt->base.reserved; |
73aa808f | 150 | mutex_lock(&dev->struct_mutex); |
1c7f4bca | 151 | list_for_each_entry(vma, &ggtt->base.active_list, vm_link) |
20dfbde4 | 152 | if (i915_vma_is_pinned(vma)) |
ca1543be | 153 | pinned += vma->node.size; |
1c7f4bca | 154 | list_for_each_entry(vma, &ggtt->base.inactive_list, vm_link) |
20dfbde4 | 155 | if (i915_vma_is_pinned(vma)) |
ca1543be | 156 | pinned += vma->node.size; |
73aa808f | 157 | mutex_unlock(&dev->struct_mutex); |
5a125c3c | 158 | |
72e96d64 | 159 | args->aper_size = ggtt->base.total; |
0206e353 | 160 | args->aper_available_size = args->aper_size - pinned; |
6299f992 | 161 | |
5a125c3c EA |
162 | return 0; |
163 | } | |
164 | ||
b91b09ee | 165 | static int i915_gem_object_get_pages_phys(struct drm_i915_gem_object *obj) |
00731155 | 166 | { |
93c76a3d | 167 | struct address_space *mapping = obj->base.filp->f_mapping; |
dbb4351b | 168 | drm_dma_handle_t *phys; |
6a2c4232 CW |
169 | struct sg_table *st; |
170 | struct scatterlist *sg; | |
dbb4351b | 171 | char *vaddr; |
6a2c4232 | 172 | int i; |
b91b09ee | 173 | int err; |
00731155 | 174 | |
6a2c4232 | 175 | if (WARN_ON(i915_gem_object_needs_bit17_swizzle(obj))) |
b91b09ee | 176 | return -EINVAL; |
6a2c4232 | 177 | |
dbb4351b CW |
178 | /* Always aligning to the object size, allows a single allocation |
179 | * to handle all possible callers, and given typical object sizes, | |
180 | * the alignment of the buddy allocation will naturally match. | |
181 | */ | |
182 | phys = drm_pci_alloc(obj->base.dev, | |
750fae23 | 183 | roundup_pow_of_two(obj->base.size), |
dbb4351b CW |
184 | roundup_pow_of_two(obj->base.size)); |
185 | if (!phys) | |
b91b09ee | 186 | return -ENOMEM; |
dbb4351b CW |
187 | |
188 | vaddr = phys->vaddr; | |
6a2c4232 CW |
189 | for (i = 0; i < obj->base.size / PAGE_SIZE; i++) { |
190 | struct page *page; | |
191 | char *src; | |
192 | ||
193 | page = shmem_read_mapping_page(mapping, i); | |
dbb4351b | 194 | if (IS_ERR(page)) { |
b91b09ee | 195 | err = PTR_ERR(page); |
dbb4351b CW |
196 | goto err_phys; |
197 | } | |
6a2c4232 CW |
198 | |
199 | src = kmap_atomic(page); | |
200 | memcpy(vaddr, src, PAGE_SIZE); | |
201 | drm_clflush_virt_range(vaddr, PAGE_SIZE); | |
202 | kunmap_atomic(src); | |
203 | ||
09cbfeaf | 204 | put_page(page); |
6a2c4232 CW |
205 | vaddr += PAGE_SIZE; |
206 | } | |
207 | ||
c033666a | 208 | i915_gem_chipset_flush(to_i915(obj->base.dev)); |
6a2c4232 CW |
209 | |
210 | st = kmalloc(sizeof(*st), GFP_KERNEL); | |
dbb4351b | 211 | if (!st) { |
b91b09ee | 212 | err = -ENOMEM; |
dbb4351b CW |
213 | goto err_phys; |
214 | } | |
6a2c4232 CW |
215 | |
216 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { | |
217 | kfree(st); | |
b91b09ee | 218 | err = -ENOMEM; |
dbb4351b | 219 | goto err_phys; |
6a2c4232 CW |
220 | } |
221 | ||
222 | sg = st->sgl; | |
223 | sg->offset = 0; | |
224 | sg->length = obj->base.size; | |
00731155 | 225 | |
dbb4351b | 226 | sg_dma_address(sg) = phys->busaddr; |
6a2c4232 CW |
227 | sg_dma_len(sg) = obj->base.size; |
228 | ||
dbb4351b | 229 | obj->phys_handle = phys; |
b91b09ee | 230 | |
a5c08166 | 231 | __i915_gem_object_set_pages(obj, st, sg->length); |
b91b09ee MA |
232 | |
233 | return 0; | |
dbb4351b CW |
234 | |
235 | err_phys: | |
236 | drm_pci_free(obj->base.dev, phys); | |
b91b09ee MA |
237 | |
238 | return err; | |
6a2c4232 CW |
239 | } |
240 | ||
e27ab73d CW |
241 | static void __start_cpu_write(struct drm_i915_gem_object *obj) |
242 | { | |
243 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; | |
244 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; | |
245 | if (cpu_write_needs_clflush(obj)) | |
246 | obj->cache_dirty = true; | |
247 | } | |
248 | ||
6a2c4232 | 249 | static void |
2b3c8317 | 250 | __i915_gem_object_release_shmem(struct drm_i915_gem_object *obj, |
e5facdf9 CW |
251 | struct sg_table *pages, |
252 | bool needs_clflush) | |
6a2c4232 | 253 | { |
a4f5ea64 | 254 | GEM_BUG_ON(obj->mm.madv == __I915_MADV_PURGED); |
00731155 | 255 | |
a4f5ea64 CW |
256 | if (obj->mm.madv == I915_MADV_DONTNEED) |
257 | obj->mm.dirty = false; | |
6a2c4232 | 258 | |
e5facdf9 CW |
259 | if (needs_clflush && |
260 | (obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0 && | |
b8f55be6 | 261 | !(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ)) |
2b3c8317 | 262 | drm_clflush_sg(pages); |
03ac84f1 | 263 | |
e27ab73d | 264 | __start_cpu_write(obj); |
03ac84f1 CW |
265 | } |
266 | ||
267 | static void | |
268 | i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj, | |
269 | struct sg_table *pages) | |
270 | { | |
e5facdf9 | 271 | __i915_gem_object_release_shmem(obj, pages, false); |
03ac84f1 | 272 | |
a4f5ea64 | 273 | if (obj->mm.dirty) { |
93c76a3d | 274 | struct address_space *mapping = obj->base.filp->f_mapping; |
6a2c4232 | 275 | char *vaddr = obj->phys_handle->vaddr; |
00731155 CW |
276 | int i; |
277 | ||
278 | for (i = 0; i < obj->base.size / PAGE_SIZE; i++) { | |
6a2c4232 CW |
279 | struct page *page; |
280 | char *dst; | |
281 | ||
282 | page = shmem_read_mapping_page(mapping, i); | |
283 | if (IS_ERR(page)) | |
284 | continue; | |
285 | ||
286 | dst = kmap_atomic(page); | |
287 | drm_clflush_virt_range(vaddr, PAGE_SIZE); | |
288 | memcpy(dst, vaddr, PAGE_SIZE); | |
289 | kunmap_atomic(dst); | |
290 | ||
291 | set_page_dirty(page); | |
a4f5ea64 | 292 | if (obj->mm.madv == I915_MADV_WILLNEED) |
00731155 | 293 | mark_page_accessed(page); |
09cbfeaf | 294 | put_page(page); |
00731155 CW |
295 | vaddr += PAGE_SIZE; |
296 | } | |
a4f5ea64 | 297 | obj->mm.dirty = false; |
00731155 CW |
298 | } |
299 | ||
03ac84f1 CW |
300 | sg_free_table(pages); |
301 | kfree(pages); | |
dbb4351b CW |
302 | |
303 | drm_pci_free(obj->base.dev, obj->phys_handle); | |
6a2c4232 CW |
304 | } |
305 | ||
306 | static void | |
307 | i915_gem_object_release_phys(struct drm_i915_gem_object *obj) | |
308 | { | |
a4f5ea64 | 309 | i915_gem_object_unpin_pages(obj); |
6a2c4232 CW |
310 | } |
311 | ||
312 | static const struct drm_i915_gem_object_ops i915_gem_phys_ops = { | |
313 | .get_pages = i915_gem_object_get_pages_phys, | |
314 | .put_pages = i915_gem_object_put_pages_phys, | |
315 | .release = i915_gem_object_release_phys, | |
316 | }; | |
317 | ||
581ab1fe CW |
318 | static const struct drm_i915_gem_object_ops i915_gem_object_ops; |
319 | ||
35a9611c | 320 | int i915_gem_object_unbind(struct drm_i915_gem_object *obj) |
aa653a68 CW |
321 | { |
322 | struct i915_vma *vma; | |
323 | LIST_HEAD(still_in_list); | |
02bef8f9 CW |
324 | int ret; |
325 | ||
326 | lockdep_assert_held(&obj->base.dev->struct_mutex); | |
aa653a68 | 327 | |
02bef8f9 CW |
328 | /* Closed vma are removed from the obj->vma_list - but they may |
329 | * still have an active binding on the object. To remove those we | |
330 | * must wait for all rendering to complete to the object (as unbinding | |
331 | * must anyway), and retire the requests. | |
aa653a68 | 332 | */ |
e95433c7 CW |
333 | ret = i915_gem_object_wait(obj, |
334 | I915_WAIT_INTERRUPTIBLE | | |
335 | I915_WAIT_LOCKED | | |
336 | I915_WAIT_ALL, | |
337 | MAX_SCHEDULE_TIMEOUT, | |
338 | NULL); | |
02bef8f9 CW |
339 | if (ret) |
340 | return ret; | |
341 | ||
342 | i915_gem_retire_requests(to_i915(obj->base.dev)); | |
343 | ||
aa653a68 CW |
344 | while ((vma = list_first_entry_or_null(&obj->vma_list, |
345 | struct i915_vma, | |
346 | obj_link))) { | |
347 | list_move_tail(&vma->obj_link, &still_in_list); | |
348 | ret = i915_vma_unbind(vma); | |
349 | if (ret) | |
350 | break; | |
351 | } | |
352 | list_splice(&still_in_list, &obj->vma_list); | |
353 | ||
354 | return ret; | |
355 | } | |
356 | ||
e95433c7 CW |
357 | static long |
358 | i915_gem_object_wait_fence(struct dma_fence *fence, | |
359 | unsigned int flags, | |
360 | long timeout, | |
562d9bae | 361 | struct intel_rps_client *rps_client) |
00e60f26 | 362 | { |
e95433c7 | 363 | struct drm_i915_gem_request *rq; |
00e60f26 | 364 | |
e95433c7 | 365 | BUILD_BUG_ON(I915_WAIT_INTERRUPTIBLE != 0x1); |
00e60f26 | 366 | |
e95433c7 CW |
367 | if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) |
368 | return timeout; | |
369 | ||
370 | if (!dma_fence_is_i915(fence)) | |
371 | return dma_fence_wait_timeout(fence, | |
372 | flags & I915_WAIT_INTERRUPTIBLE, | |
373 | timeout); | |
374 | ||
375 | rq = to_request(fence); | |
376 | if (i915_gem_request_completed(rq)) | |
377 | goto out; | |
378 | ||
379 | /* This client is about to stall waiting for the GPU. In many cases | |
380 | * this is undesirable and limits the throughput of the system, as | |
381 | * many clients cannot continue processing user input/output whilst | |
382 | * blocked. RPS autotuning may take tens of milliseconds to respond | |
383 | * to the GPU load and thus incurs additional latency for the client. | |
384 | * We can circumvent that by promoting the GPU frequency to maximum | |
385 | * before we wait. This makes the GPU throttle up much more quickly | |
386 | * (good for benchmarks and user experience, e.g. window animations), | |
387 | * but at a cost of spending more power processing the workload | |
388 | * (bad for battery). Not all clients even want their results | |
389 | * immediately and for them we should just let the GPU select its own | |
390 | * frequency to maximise efficiency. To prevent a single client from | |
391 | * forcing the clocks too high for the whole system, we only allow | |
392 | * each client to waitboost once in a busy period. | |
393 | */ | |
562d9bae | 394 | if (rps_client) { |
e95433c7 | 395 | if (INTEL_GEN(rq->i915) >= 6) |
562d9bae | 396 | gen6_rps_boost(rq, rps_client); |
e95433c7 | 397 | else |
562d9bae | 398 | rps_client = NULL; |
00e60f26 CW |
399 | } |
400 | ||
e95433c7 CW |
401 | timeout = i915_wait_request(rq, flags, timeout); |
402 | ||
403 | out: | |
404 | if (flags & I915_WAIT_LOCKED && i915_gem_request_completed(rq)) | |
405 | i915_gem_request_retire_upto(rq); | |
406 | ||
e95433c7 CW |
407 | return timeout; |
408 | } | |
409 | ||
410 | static long | |
411 | i915_gem_object_wait_reservation(struct reservation_object *resv, | |
412 | unsigned int flags, | |
413 | long timeout, | |
562d9bae | 414 | struct intel_rps_client *rps_client) |
e95433c7 | 415 | { |
e54ca977 | 416 | unsigned int seq = __read_seqcount_begin(&resv->seq); |
e95433c7 | 417 | struct dma_fence *excl; |
e54ca977 | 418 | bool prune_fences = false; |
e95433c7 CW |
419 | |
420 | if (flags & I915_WAIT_ALL) { | |
421 | struct dma_fence **shared; | |
422 | unsigned int count, i; | |
00e60f26 CW |
423 | int ret; |
424 | ||
e95433c7 CW |
425 | ret = reservation_object_get_fences_rcu(resv, |
426 | &excl, &count, &shared); | |
00e60f26 CW |
427 | if (ret) |
428 | return ret; | |
00e60f26 | 429 | |
e95433c7 CW |
430 | for (i = 0; i < count; i++) { |
431 | timeout = i915_gem_object_wait_fence(shared[i], | |
432 | flags, timeout, | |
562d9bae | 433 | rps_client); |
d892e939 | 434 | if (timeout < 0) |
e95433c7 | 435 | break; |
00e60f26 | 436 | |
e95433c7 CW |
437 | dma_fence_put(shared[i]); |
438 | } | |
439 | ||
440 | for (; i < count; i++) | |
441 | dma_fence_put(shared[i]); | |
442 | kfree(shared); | |
e54ca977 CW |
443 | |
444 | prune_fences = count && timeout >= 0; | |
e95433c7 CW |
445 | } else { |
446 | excl = reservation_object_get_excl_rcu(resv); | |
00e60f26 CW |
447 | } |
448 | ||
e54ca977 | 449 | if (excl && timeout >= 0) { |
562d9bae SAK |
450 | timeout = i915_gem_object_wait_fence(excl, flags, timeout, |
451 | rps_client); | |
e54ca977 CW |
452 | prune_fences = timeout >= 0; |
453 | } | |
e95433c7 CW |
454 | |
455 | dma_fence_put(excl); | |
456 | ||
03d1cac6 CW |
457 | /* Oportunistically prune the fences iff we know they have *all* been |
458 | * signaled and that the reservation object has not been changed (i.e. | |
459 | * no new fences have been added). | |
460 | */ | |
e54ca977 | 461 | if (prune_fences && !__read_seqcount_retry(&resv->seq, seq)) { |
03d1cac6 CW |
462 | if (reservation_object_trylock(resv)) { |
463 | if (!__read_seqcount_retry(&resv->seq, seq)) | |
464 | reservation_object_add_excl_fence(resv, NULL); | |
465 | reservation_object_unlock(resv); | |
466 | } | |
e54ca977 CW |
467 | } |
468 | ||
e95433c7 | 469 | return timeout; |
00e60f26 CW |
470 | } |
471 | ||
6b5e90f5 CW |
472 | static void __fence_set_priority(struct dma_fence *fence, int prio) |
473 | { | |
474 | struct drm_i915_gem_request *rq; | |
475 | struct intel_engine_cs *engine; | |
476 | ||
477 | if (!dma_fence_is_i915(fence)) | |
478 | return; | |
479 | ||
480 | rq = to_request(fence); | |
481 | engine = rq->engine; | |
482 | if (!engine->schedule) | |
483 | return; | |
484 | ||
485 | engine->schedule(rq, prio); | |
486 | } | |
487 | ||
488 | static void fence_set_priority(struct dma_fence *fence, int prio) | |
489 | { | |
490 | /* Recurse once into a fence-array */ | |
491 | if (dma_fence_is_array(fence)) { | |
492 | struct dma_fence_array *array = to_dma_fence_array(fence); | |
493 | int i; | |
494 | ||
495 | for (i = 0; i < array->num_fences; i++) | |
496 | __fence_set_priority(array->fences[i], prio); | |
497 | } else { | |
498 | __fence_set_priority(fence, prio); | |
499 | } | |
500 | } | |
501 | ||
502 | int | |
503 | i915_gem_object_wait_priority(struct drm_i915_gem_object *obj, | |
504 | unsigned int flags, | |
505 | int prio) | |
506 | { | |
507 | struct dma_fence *excl; | |
508 | ||
509 | if (flags & I915_WAIT_ALL) { | |
510 | struct dma_fence **shared; | |
511 | unsigned int count, i; | |
512 | int ret; | |
513 | ||
514 | ret = reservation_object_get_fences_rcu(obj->resv, | |
515 | &excl, &count, &shared); | |
516 | if (ret) | |
517 | return ret; | |
518 | ||
519 | for (i = 0; i < count; i++) { | |
520 | fence_set_priority(shared[i], prio); | |
521 | dma_fence_put(shared[i]); | |
522 | } | |
523 | ||
524 | kfree(shared); | |
525 | } else { | |
526 | excl = reservation_object_get_excl_rcu(obj->resv); | |
527 | } | |
528 | ||
529 | if (excl) { | |
530 | fence_set_priority(excl, prio); | |
531 | dma_fence_put(excl); | |
532 | } | |
533 | return 0; | |
534 | } | |
535 | ||
e95433c7 CW |
536 | /** |
537 | * Waits for rendering to the object to be completed | |
538 | * @obj: i915 gem object | |
539 | * @flags: how to wait (under a lock, for all rendering or just for writes etc) | |
540 | * @timeout: how long to wait | |
541 | * @rps: client (user process) to charge for any waitboosting | |
00e60f26 | 542 | */ |
e95433c7 CW |
543 | int |
544 | i915_gem_object_wait(struct drm_i915_gem_object *obj, | |
545 | unsigned int flags, | |
546 | long timeout, | |
562d9bae | 547 | struct intel_rps_client *rps_client) |
00e60f26 | 548 | { |
e95433c7 CW |
549 | might_sleep(); |
550 | #if IS_ENABLED(CONFIG_LOCKDEP) | |
551 | GEM_BUG_ON(debug_locks && | |
552 | !!lockdep_is_held(&obj->base.dev->struct_mutex) != | |
553 | !!(flags & I915_WAIT_LOCKED)); | |
554 | #endif | |
555 | GEM_BUG_ON(timeout < 0); | |
00e60f26 | 556 | |
d07f0e59 CW |
557 | timeout = i915_gem_object_wait_reservation(obj->resv, |
558 | flags, timeout, | |
562d9bae | 559 | rps_client); |
e95433c7 | 560 | return timeout < 0 ? timeout : 0; |
00e60f26 CW |
561 | } |
562 | ||
563 | static struct intel_rps_client *to_rps_client(struct drm_file *file) | |
564 | { | |
565 | struct drm_i915_file_private *fpriv = file->driver_priv; | |
566 | ||
562d9bae | 567 | return &fpriv->rps_client; |
00e60f26 CW |
568 | } |
569 | ||
00731155 CW |
570 | static int |
571 | i915_gem_phys_pwrite(struct drm_i915_gem_object *obj, | |
572 | struct drm_i915_gem_pwrite *args, | |
03ac84f1 | 573 | struct drm_file *file) |
00731155 | 574 | { |
00731155 | 575 | void *vaddr = obj->phys_handle->vaddr + args->offset; |
3ed605bc | 576 | char __user *user_data = u64_to_user_ptr(args->data_ptr); |
6a2c4232 CW |
577 | |
578 | /* We manually control the domain here and pretend that it | |
579 | * remains coherent i.e. in the GTT domain, like shmem_pwrite. | |
580 | */ | |
77a0d1ca | 581 | intel_fb_obj_invalidate(obj, ORIGIN_CPU); |
10466d2a CW |
582 | if (copy_from_user(vaddr, user_data, args->size)) |
583 | return -EFAULT; | |
00731155 | 584 | |
6a2c4232 | 585 | drm_clflush_virt_range(vaddr, args->size); |
10466d2a | 586 | i915_gem_chipset_flush(to_i915(obj->base.dev)); |
063e4e6b | 587 | |
d59b21ec | 588 | intel_fb_obj_flush(obj, ORIGIN_CPU); |
10466d2a | 589 | return 0; |
00731155 CW |
590 | } |
591 | ||
187685cb | 592 | void *i915_gem_object_alloc(struct drm_i915_private *dev_priv) |
42dcedd4 | 593 | { |
efab6d8d | 594 | return kmem_cache_zalloc(dev_priv->objects, GFP_KERNEL); |
42dcedd4 CW |
595 | } |
596 | ||
597 | void i915_gem_object_free(struct drm_i915_gem_object *obj) | |
598 | { | |
fac5e23e | 599 | struct drm_i915_private *dev_priv = to_i915(obj->base.dev); |
efab6d8d | 600 | kmem_cache_free(dev_priv->objects, obj); |
42dcedd4 CW |
601 | } |
602 | ||
ff72145b DA |
603 | static int |
604 | i915_gem_create(struct drm_file *file, | |
12d79d78 | 605 | struct drm_i915_private *dev_priv, |
ff72145b DA |
606 | uint64_t size, |
607 | uint32_t *handle_p) | |
673a394b | 608 | { |
05394f39 | 609 | struct drm_i915_gem_object *obj; |
a1a2d1d3 PP |
610 | int ret; |
611 | u32 handle; | |
673a394b | 612 | |
ff72145b | 613 | size = roundup(size, PAGE_SIZE); |
8ffc0246 CW |
614 | if (size == 0) |
615 | return -EINVAL; | |
673a394b EA |
616 | |
617 | /* Allocate the new object */ | |
12d79d78 | 618 | obj = i915_gem_object_create(dev_priv, size); |
fe3db79b CW |
619 | if (IS_ERR(obj)) |
620 | return PTR_ERR(obj); | |
673a394b | 621 | |
05394f39 | 622 | ret = drm_gem_handle_create(file, &obj->base, &handle); |
202f2fef | 623 | /* drop reference from allocate - handle holds it now */ |
f0cd5182 | 624 | i915_gem_object_put(obj); |
d861e338 DV |
625 | if (ret) |
626 | return ret; | |
202f2fef | 627 | |
ff72145b | 628 | *handle_p = handle; |
673a394b EA |
629 | return 0; |
630 | } | |
631 | ||
ff72145b DA |
632 | int |
633 | i915_gem_dumb_create(struct drm_file *file, | |
634 | struct drm_device *dev, | |
635 | struct drm_mode_create_dumb *args) | |
636 | { | |
637 | /* have to work out size/pitch and return them */ | |
de45eaf7 | 638 | args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 64); |
ff72145b | 639 | args->size = args->pitch * args->height; |
12d79d78 | 640 | return i915_gem_create(file, to_i915(dev), |
da6b51d0 | 641 | args->size, &args->handle); |
ff72145b DA |
642 | } |
643 | ||
e27ab73d CW |
644 | static bool gpu_write_needs_clflush(struct drm_i915_gem_object *obj) |
645 | { | |
646 | return !(obj->cache_level == I915_CACHE_NONE || | |
647 | obj->cache_level == I915_CACHE_WT); | |
648 | } | |
649 | ||
ff72145b DA |
650 | /** |
651 | * Creates a new mm object and returns a handle to it. | |
14bb2c11 TU |
652 | * @dev: drm device pointer |
653 | * @data: ioctl data blob | |
654 | * @file: drm file pointer | |
ff72145b DA |
655 | */ |
656 | int | |
657 | i915_gem_create_ioctl(struct drm_device *dev, void *data, | |
658 | struct drm_file *file) | |
659 | { | |
12d79d78 | 660 | struct drm_i915_private *dev_priv = to_i915(dev); |
ff72145b | 661 | struct drm_i915_gem_create *args = data; |
63ed2cb2 | 662 | |
12d79d78 | 663 | i915_gem_flush_free_objects(dev_priv); |
fbbd37b3 | 664 | |
12d79d78 | 665 | return i915_gem_create(file, dev_priv, |
da6b51d0 | 666 | args->size, &args->handle); |
ff72145b DA |
667 | } |
668 | ||
ef74921b CW |
669 | static inline enum fb_op_origin |
670 | fb_write_origin(struct drm_i915_gem_object *obj, unsigned int domain) | |
671 | { | |
672 | return (domain == I915_GEM_DOMAIN_GTT ? | |
673 | obj->frontbuffer_ggtt_origin : ORIGIN_CPU); | |
674 | } | |
675 | ||
676 | static void | |
677 | flush_write_domain(struct drm_i915_gem_object *obj, unsigned int flush_domains) | |
678 | { | |
679 | struct drm_i915_private *dev_priv = to_i915(obj->base.dev); | |
680 | ||
681 | if (!(obj->base.write_domain & flush_domains)) | |
682 | return; | |
683 | ||
684 | /* No actual flushing is required for the GTT write domain. Writes | |
685 | * to it "immediately" go to main memory as far as we know, so there's | |
686 | * no chipset flush. It also doesn't land in render cache. | |
687 | * | |
688 | * However, we do have to enforce the order so that all writes through | |
689 | * the GTT land before any writes to the device, such as updates to | |
690 | * the GATT itself. | |
691 | * | |
692 | * We also have to wait a bit for the writes to land from the GTT. | |
693 | * An uncached read (i.e. mmio) seems to be ideal for the round-trip | |
694 | * timing. This issue has only been observed when switching quickly | |
695 | * between GTT writes and CPU reads from inside the kernel on recent hw, | |
696 | * and it appears to only affect discrete GTT blocks (i.e. on LLC | |
697 | * system agents we cannot reproduce this behaviour). | |
698 | */ | |
699 | wmb(); | |
700 | ||
701 | switch (obj->base.write_domain) { | |
702 | case I915_GEM_DOMAIN_GTT: | |
c5ba5b24 | 703 | if (!HAS_LLC(dev_priv)) { |
b69a784f CW |
704 | intel_runtime_pm_get(dev_priv); |
705 | spin_lock_irq(&dev_priv->uncore.lock); | |
c5ba5b24 | 706 | POSTING_READ_FW(RING_HEAD(dev_priv->engine[RCS]->mmio_base)); |
b69a784f CW |
707 | spin_unlock_irq(&dev_priv->uncore.lock); |
708 | intel_runtime_pm_put(dev_priv); | |
ef74921b CW |
709 | } |
710 | ||
711 | intel_fb_obj_flush(obj, | |
712 | fb_write_origin(obj, I915_GEM_DOMAIN_GTT)); | |
713 | break; | |
714 | ||
715 | case I915_GEM_DOMAIN_CPU: | |
716 | i915_gem_clflush_object(obj, I915_CLFLUSH_SYNC); | |
717 | break; | |
e27ab73d CW |
718 | |
719 | case I915_GEM_DOMAIN_RENDER: | |
720 | if (gpu_write_needs_clflush(obj)) | |
721 | obj->cache_dirty = true; | |
722 | break; | |
ef74921b CW |
723 | } |
724 | ||
725 | obj->base.write_domain = 0; | |
726 | } | |
727 | ||
8461d226 DV |
728 | static inline int |
729 | __copy_to_user_swizzled(char __user *cpu_vaddr, | |
730 | const char *gpu_vaddr, int gpu_offset, | |
731 | int length) | |
732 | { | |
733 | int ret, cpu_offset = 0; | |
734 | ||
735 | while (length > 0) { | |
736 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
737 | int this_length = min(cacheline_end - gpu_offset, length); | |
738 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
739 | ||
740 | ret = __copy_to_user(cpu_vaddr + cpu_offset, | |
741 | gpu_vaddr + swizzled_gpu_offset, | |
742 | this_length); | |
743 | if (ret) | |
744 | return ret + length; | |
745 | ||
746 | cpu_offset += this_length; | |
747 | gpu_offset += this_length; | |
748 | length -= this_length; | |
749 | } | |
750 | ||
751 | return 0; | |
752 | } | |
753 | ||
8c59967c | 754 | static inline int |
4f0c7cfb BW |
755 | __copy_from_user_swizzled(char *gpu_vaddr, int gpu_offset, |
756 | const char __user *cpu_vaddr, | |
8c59967c DV |
757 | int length) |
758 | { | |
759 | int ret, cpu_offset = 0; | |
760 | ||
761 | while (length > 0) { | |
762 | int cacheline_end = ALIGN(gpu_offset + 1, 64); | |
763 | int this_length = min(cacheline_end - gpu_offset, length); | |
764 | int swizzled_gpu_offset = gpu_offset ^ 64; | |
765 | ||
766 | ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset, | |
767 | cpu_vaddr + cpu_offset, | |
768 | this_length); | |
769 | if (ret) | |
770 | return ret + length; | |
771 | ||
772 | cpu_offset += this_length; | |
773 | gpu_offset += this_length; | |
774 | length -= this_length; | |
775 | } | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
4c914c0c BV |
780 | /* |
781 | * Pins the specified object's pages and synchronizes the object with | |
782 | * GPU accesses. Sets needs_clflush to non-zero if the caller should | |
783 | * flush the object from the CPU cache. | |
784 | */ | |
785 | int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object *obj, | |
43394c7d | 786 | unsigned int *needs_clflush) |
4c914c0c BV |
787 | { |
788 | int ret; | |
789 | ||
e95433c7 | 790 | lockdep_assert_held(&obj->base.dev->struct_mutex); |
4c914c0c | 791 | |
e95433c7 | 792 | *needs_clflush = 0; |
43394c7d CW |
793 | if (!i915_gem_object_has_struct_page(obj)) |
794 | return -ENODEV; | |
4c914c0c | 795 | |
e95433c7 CW |
796 | ret = i915_gem_object_wait(obj, |
797 | I915_WAIT_INTERRUPTIBLE | | |
798 | I915_WAIT_LOCKED, | |
799 | MAX_SCHEDULE_TIMEOUT, | |
800 | NULL); | |
c13d87ea CW |
801 | if (ret) |
802 | return ret; | |
803 | ||
a4f5ea64 | 804 | ret = i915_gem_object_pin_pages(obj); |
9764951e CW |
805 | if (ret) |
806 | return ret; | |
807 | ||
b8f55be6 CW |
808 | if (obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ || |
809 | !static_cpu_has(X86_FEATURE_CLFLUSH)) { | |
7f5f95d8 CW |
810 | ret = i915_gem_object_set_to_cpu_domain(obj, false); |
811 | if (ret) | |
812 | goto err_unpin; | |
813 | else | |
814 | goto out; | |
815 | } | |
816 | ||
ef74921b | 817 | flush_write_domain(obj, ~I915_GEM_DOMAIN_CPU); |
a314d5cb | 818 | |
43394c7d CW |
819 | /* If we're not in the cpu read domain, set ourself into the gtt |
820 | * read domain and manually flush cachelines (if required). This | |
821 | * optimizes for the case when the gpu will dirty the data | |
822 | * anyway again before the next pread happens. | |
823 | */ | |
e27ab73d CW |
824 | if (!obj->cache_dirty && |
825 | !(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) | |
7f5f95d8 | 826 | *needs_clflush = CLFLUSH_BEFORE; |
4c914c0c | 827 | |
7f5f95d8 | 828 | out: |
9764951e | 829 | /* return with the pages pinned */ |
43394c7d | 830 | return 0; |
9764951e CW |
831 | |
832 | err_unpin: | |
833 | i915_gem_object_unpin_pages(obj); | |
834 | return ret; | |
43394c7d CW |
835 | } |
836 | ||
837 | int i915_gem_obj_prepare_shmem_write(struct drm_i915_gem_object *obj, | |
838 | unsigned int *needs_clflush) | |
839 | { | |
840 | int ret; | |
841 | ||
e95433c7 CW |
842 | lockdep_assert_held(&obj->base.dev->struct_mutex); |
843 | ||
43394c7d CW |
844 | *needs_clflush = 0; |
845 | if (!i915_gem_object_has_struct_page(obj)) | |
846 | return -ENODEV; | |
847 | ||
e95433c7 CW |
848 | ret = i915_gem_object_wait(obj, |
849 | I915_WAIT_INTERRUPTIBLE | | |
850 | I915_WAIT_LOCKED | | |
851 | I915_WAIT_ALL, | |
852 | MAX_SCHEDULE_TIMEOUT, | |
853 | NULL); | |
43394c7d CW |
854 | if (ret) |
855 | return ret; | |
856 | ||
a4f5ea64 | 857 | ret = i915_gem_object_pin_pages(obj); |
9764951e CW |
858 | if (ret) |
859 | return ret; | |
860 | ||
b8f55be6 CW |
861 | if (obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE || |
862 | !static_cpu_has(X86_FEATURE_CLFLUSH)) { | |
7f5f95d8 CW |
863 | ret = i915_gem_object_set_to_cpu_domain(obj, true); |
864 | if (ret) | |
865 | goto err_unpin; | |
866 | else | |
867 | goto out; | |
868 | } | |
869 | ||
ef74921b | 870 | flush_write_domain(obj, ~I915_GEM_DOMAIN_CPU); |
a314d5cb | 871 | |
43394c7d CW |
872 | /* If we're not in the cpu write domain, set ourself into the |
873 | * gtt write domain and manually flush cachelines (as required). | |
874 | * This optimizes for the case when the gpu will use the data | |
875 | * right away and we therefore have to clflush anyway. | |
876 | */ | |
e27ab73d | 877 | if (!obj->cache_dirty) { |
7f5f95d8 | 878 | *needs_clflush |= CLFLUSH_AFTER; |
43394c7d | 879 | |
e27ab73d CW |
880 | /* |
881 | * Same trick applies to invalidate partially written | |
882 | * cachelines read before writing. | |
883 | */ | |
884 | if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) | |
885 | *needs_clflush |= CLFLUSH_BEFORE; | |
886 | } | |
43394c7d | 887 | |
7f5f95d8 | 888 | out: |
43394c7d | 889 | intel_fb_obj_invalidate(obj, ORIGIN_CPU); |
a4f5ea64 | 890 | obj->mm.dirty = true; |
9764951e | 891 | /* return with the pages pinned */ |
43394c7d | 892 | return 0; |
9764951e CW |
893 | |
894 | err_unpin: | |
895 | i915_gem_object_unpin_pages(obj); | |
896 | return ret; | |
4c914c0c BV |
897 | } |
898 | ||
23c18c71 DV |
899 | static void |
900 | shmem_clflush_swizzled_range(char *addr, unsigned long length, | |
901 | bool swizzled) | |
902 | { | |
e7e58eb5 | 903 | if (unlikely(swizzled)) { |
23c18c71 DV |
904 | unsigned long start = (unsigned long) addr; |
905 | unsigned long end = (unsigned long) addr + length; | |
906 | ||
907 | /* For swizzling simply ensure that we always flush both | |
908 | * channels. Lame, but simple and it works. Swizzled | |
909 | * pwrite/pread is far from a hotpath - current userspace | |
910 | * doesn't use it at all. */ | |
911 | start = round_down(start, 128); | |
912 | end = round_up(end, 128); | |
913 | ||
914 | drm_clflush_virt_range((void *)start, end - start); | |
915 | } else { | |
916 | drm_clflush_virt_range(addr, length); | |
917 | } | |
918 | ||
919 | } | |
920 | ||
d174bd64 DV |
921 | /* Only difference to the fast-path function is that this can handle bit17 |
922 | * and uses non-atomic copy and kmap functions. */ | |
923 | static int | |
bb6dc8d9 | 924 | shmem_pread_slow(struct page *page, int offset, int length, |
d174bd64 DV |
925 | char __user *user_data, |
926 | bool page_do_bit17_swizzling, bool needs_clflush) | |
927 | { | |
928 | char *vaddr; | |
929 | int ret; | |
930 | ||
931 | vaddr = kmap(page); | |
932 | if (needs_clflush) | |
bb6dc8d9 | 933 | shmem_clflush_swizzled_range(vaddr + offset, length, |
23c18c71 | 934 | page_do_bit17_swizzling); |
d174bd64 DV |
935 | |
936 | if (page_do_bit17_swizzling) | |
bb6dc8d9 | 937 | ret = __copy_to_user_swizzled(user_data, vaddr, offset, length); |
d174bd64 | 938 | else |
bb6dc8d9 | 939 | ret = __copy_to_user(user_data, vaddr + offset, length); |
d174bd64 DV |
940 | kunmap(page); |
941 | ||
f60d7f0c | 942 | return ret ? - EFAULT : 0; |
d174bd64 DV |
943 | } |
944 | ||
bb6dc8d9 CW |
945 | static int |
946 | shmem_pread(struct page *page, int offset, int length, char __user *user_data, | |
947 | bool page_do_bit17_swizzling, bool needs_clflush) | |
948 | { | |
949 | int ret; | |
950 | ||
951 | ret = -ENODEV; | |
952 | if (!page_do_bit17_swizzling) { | |
953 | char *vaddr = kmap_atomic(page); | |
954 | ||
955 | if (needs_clflush) | |
956 | drm_clflush_virt_range(vaddr + offset, length); | |
957 | ret = __copy_to_user_inatomic(user_data, vaddr + offset, length); | |
958 | kunmap_atomic(vaddr); | |
959 | } | |
960 | if (ret == 0) | |
961 | return 0; | |
962 | ||
963 | return shmem_pread_slow(page, offset, length, user_data, | |
964 | page_do_bit17_swizzling, needs_clflush); | |
965 | } | |
966 | ||
967 | static int | |
968 | i915_gem_shmem_pread(struct drm_i915_gem_object *obj, | |
969 | struct drm_i915_gem_pread *args) | |
970 | { | |
971 | char __user *user_data; | |
972 | u64 remain; | |
973 | unsigned int obj_do_bit17_swizzling; | |
974 | unsigned int needs_clflush; | |
975 | unsigned int idx, offset; | |
976 | int ret; | |
977 | ||
978 | obj_do_bit17_swizzling = 0; | |
979 | if (i915_gem_object_needs_bit17_swizzle(obj)) | |
980 | obj_do_bit17_swizzling = BIT(17); | |
981 | ||
982 | ret = mutex_lock_interruptible(&obj->base.dev->struct_mutex); | |
983 | if (ret) | |
984 | return ret; | |
985 | ||
986 | ret = i915_gem_obj_prepare_shmem_read(obj, &needs_clflush); | |
987 | mutex_unlock(&obj->base.dev->struct_mutex); | |
988 | if (ret) | |
989 | return ret; | |
990 | ||
991 | remain = args->size; | |
992 | user_data = u64_to_user_ptr(args->data_ptr); | |
993 | offset = offset_in_page(args->offset); | |
994 | for (idx = args->offset >> PAGE_SHIFT; remain; idx++) { | |
995 | struct page *page = i915_gem_object_get_page(obj, idx); | |
996 | int length; | |
997 | ||
998 | length = remain; | |
999 | if (offset + length > PAGE_SIZE) | |
1000 | length = PAGE_SIZE - offset; | |
1001 | ||
1002 | ret = shmem_pread(page, offset, length, user_data, | |
1003 | page_to_phys(page) & obj_do_bit17_swizzling, | |
1004 | needs_clflush); | |
1005 | if (ret) | |
1006 | break; | |
1007 | ||
1008 | remain -= length; | |
1009 | user_data += length; | |
1010 | offset = 0; | |
1011 | } | |
1012 | ||
1013 | i915_gem_obj_finish_shmem_access(obj); | |
1014 | return ret; | |
1015 | } | |
1016 | ||
1017 | static inline bool | |
1018 | gtt_user_read(struct io_mapping *mapping, | |
1019 | loff_t base, int offset, | |
1020 | char __user *user_data, int length) | |
b50a5371 | 1021 | { |
afe722be | 1022 | void __iomem *vaddr; |
bb6dc8d9 | 1023 | unsigned long unwritten; |
b50a5371 | 1024 | |
b50a5371 | 1025 | /* We can use the cpu mem copy function because this is X86. */ |
afe722be VS |
1026 | vaddr = io_mapping_map_atomic_wc(mapping, base); |
1027 | unwritten = __copy_to_user_inatomic(user_data, | |
1028 | (void __force *)vaddr + offset, | |
1029 | length); | |
bb6dc8d9 CW |
1030 | io_mapping_unmap_atomic(vaddr); |
1031 | if (unwritten) { | |
afe722be VS |
1032 | vaddr = io_mapping_map_wc(mapping, base, PAGE_SIZE); |
1033 | unwritten = copy_to_user(user_data, | |
1034 | (void __force *)vaddr + offset, | |
1035 | length); | |
bb6dc8d9 CW |
1036 | io_mapping_unmap(vaddr); |
1037 | } | |
b50a5371 AS |
1038 | return unwritten; |
1039 | } | |
1040 | ||
1041 | static int | |
bb6dc8d9 CW |
1042 | i915_gem_gtt_pread(struct drm_i915_gem_object *obj, |
1043 | const struct drm_i915_gem_pread *args) | |
b50a5371 | 1044 | { |
bb6dc8d9 CW |
1045 | struct drm_i915_private *i915 = to_i915(obj->base.dev); |
1046 | struct i915_ggtt *ggtt = &i915->ggtt; | |
b50a5371 | 1047 | struct drm_mm_node node; |
bb6dc8d9 CW |
1048 | struct i915_vma *vma; |
1049 | void __user *user_data; | |
1050 | u64 remain, offset; | |
b50a5371 AS |
1051 | int ret; |
1052 | ||
bb6dc8d9 CW |
1053 | ret = mutex_lock_interruptible(&i915->drm.struct_mutex); |
1054 | if (ret) | |
1055 | return ret; | |
1056 | ||
1057 | intel_runtime_pm_get(i915); | |
1058 | vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, | |
a3259ca9 CW |
1059 | PIN_MAPPABLE | |
1060 | PIN_NONFAULT | | |
1061 | PIN_NONBLOCK); | |
18034584 CW |
1062 | if (!IS_ERR(vma)) { |
1063 | node.start = i915_ggtt_offset(vma); | |
1064 | node.allocated = false; | |
49ef5294 | 1065 | ret = i915_vma_put_fence(vma); |
18034584 CW |
1066 | if (ret) { |
1067 | i915_vma_unpin(vma); | |
1068 | vma = ERR_PTR(ret); | |
1069 | } | |
1070 | } | |
058d88c4 | 1071 | if (IS_ERR(vma)) { |
bb6dc8d9 | 1072 | ret = insert_mappable_node(ggtt, &node, PAGE_SIZE); |
b50a5371 | 1073 | if (ret) |
bb6dc8d9 CW |
1074 | goto out_unlock; |
1075 | GEM_BUG_ON(!node.allocated); | |
b50a5371 AS |
1076 | } |
1077 | ||
1078 | ret = i915_gem_object_set_to_gtt_domain(obj, false); | |
1079 | if (ret) | |
1080 | goto out_unpin; | |
1081 | ||
bb6dc8d9 | 1082 | mutex_unlock(&i915->drm.struct_mutex); |
b50a5371 | 1083 | |
bb6dc8d9 CW |
1084 | user_data = u64_to_user_ptr(args->data_ptr); |
1085 | remain = args->size; | |
1086 | offset = args->offset; | |
b50a5371 AS |
1087 | |
1088 | while (remain > 0) { | |
1089 | /* Operation in this page | |
1090 | * | |
1091 | * page_base = page offset within aperture | |
1092 | * page_offset = offset within page | |
1093 | * page_length = bytes to copy for this page | |
1094 | */ | |
1095 | u32 page_base = node.start; | |
1096 | unsigned page_offset = offset_in_page(offset); | |
1097 | unsigned page_length = PAGE_SIZE - page_offset; | |
1098 | page_length = remain < page_length ? remain : page_length; | |
1099 | if (node.allocated) { | |
1100 | wmb(); | |
1101 | ggtt->base.insert_page(&ggtt->base, | |
1102 | i915_gem_object_get_dma_address(obj, offset >> PAGE_SHIFT), | |
bb6dc8d9 | 1103 | node.start, I915_CACHE_NONE, 0); |
b50a5371 AS |
1104 | wmb(); |
1105 | } else { | |
1106 | page_base += offset & PAGE_MASK; | |
1107 | } | |
bb6dc8d9 CW |
1108 | |
1109 | if (gtt_user_read(&ggtt->mappable, page_base, page_offset, | |
1110 | user_data, page_length)) { | |
b50a5371 AS |
1111 | ret = -EFAULT; |
1112 | break; | |
1113 | } | |
1114 | ||
1115 | remain -= page_length; | |
1116 | user_data += page_length; | |
1117 | offset += page_length; | |
1118 | } | |
1119 | ||
bb6dc8d9 | 1120 | mutex_lock(&i915->drm.struct_mutex); |
b50a5371 AS |
1121 | out_unpin: |
1122 | if (node.allocated) { | |
1123 | wmb(); | |
1124 | ggtt->base.clear_range(&ggtt->base, | |
4fb84d99 | 1125 | node.start, node.size); |
b50a5371 AS |
1126 | remove_mappable_node(&node); |
1127 | } else { | |
058d88c4 | 1128 | i915_vma_unpin(vma); |
b50a5371 | 1129 | } |
bb6dc8d9 CW |
1130 | out_unlock: |
1131 | intel_runtime_pm_put(i915); | |
1132 | mutex_unlock(&i915->drm.struct_mutex); | |
f60d7f0c | 1133 | |
eb01459f EA |
1134 | return ret; |
1135 | } | |
1136 | ||
673a394b EA |
1137 | /** |
1138 | * Reads data from the object referenced by handle. | |
14bb2c11 TU |
1139 | * @dev: drm device pointer |
1140 | * @data: ioctl data blob | |
1141 | * @file: drm file pointer | |
673a394b EA |
1142 | * |
1143 | * On error, the contents of *data are undefined. | |
1144 | */ | |
1145 | int | |
1146 | i915_gem_pread_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1147 | struct drm_file *file) |
673a394b EA |
1148 | { |
1149 | struct drm_i915_gem_pread *args = data; | |
05394f39 | 1150 | struct drm_i915_gem_object *obj; |
bb6dc8d9 | 1151 | int ret; |
673a394b | 1152 | |
51311d0a CW |
1153 | if (args->size == 0) |
1154 | return 0; | |
1155 | ||
1156 | if (!access_ok(VERIFY_WRITE, | |
3ed605bc | 1157 | u64_to_user_ptr(args->data_ptr), |
51311d0a CW |
1158 | args->size)) |
1159 | return -EFAULT; | |
1160 | ||
03ac0642 | 1161 | obj = i915_gem_object_lookup(file, args->handle); |
258a5ede CW |
1162 | if (!obj) |
1163 | return -ENOENT; | |
673a394b | 1164 | |
7dcd2499 | 1165 | /* Bounds check source. */ |
966d5bf5 | 1166 | if (range_overflows_t(u64, args->offset, args->size, obj->base.size)) { |
ce9d419d | 1167 | ret = -EINVAL; |
bb6dc8d9 | 1168 | goto out; |
ce9d419d CW |
1169 | } |
1170 | ||
db53a302 CW |
1171 | trace_i915_gem_object_pread(obj, args->offset, args->size); |
1172 | ||
e95433c7 CW |
1173 | ret = i915_gem_object_wait(obj, |
1174 | I915_WAIT_INTERRUPTIBLE, | |
1175 | MAX_SCHEDULE_TIMEOUT, | |
1176 | to_rps_client(file)); | |
258a5ede | 1177 | if (ret) |
bb6dc8d9 | 1178 | goto out; |
258a5ede | 1179 | |
bb6dc8d9 | 1180 | ret = i915_gem_object_pin_pages(obj); |
258a5ede | 1181 | if (ret) |
bb6dc8d9 | 1182 | goto out; |
673a394b | 1183 | |
bb6dc8d9 | 1184 | ret = i915_gem_shmem_pread(obj, args); |
9c870d03 | 1185 | if (ret == -EFAULT || ret == -ENODEV) |
bb6dc8d9 | 1186 | ret = i915_gem_gtt_pread(obj, args); |
b50a5371 | 1187 | |
bb6dc8d9 CW |
1188 | i915_gem_object_unpin_pages(obj); |
1189 | out: | |
f0cd5182 | 1190 | i915_gem_object_put(obj); |
eb01459f | 1191 | return ret; |
673a394b EA |
1192 | } |
1193 | ||
0839ccb8 KP |
1194 | /* This is the fast write path which cannot handle |
1195 | * page faults in the source data | |
9b7530cc | 1196 | */ |
0839ccb8 | 1197 | |
fe115628 CW |
1198 | static inline bool |
1199 | ggtt_write(struct io_mapping *mapping, | |
1200 | loff_t base, int offset, | |
1201 | char __user *user_data, int length) | |
9b7530cc | 1202 | { |
afe722be | 1203 | void __iomem *vaddr; |
0839ccb8 | 1204 | unsigned long unwritten; |
9b7530cc | 1205 | |
4f0c7cfb | 1206 | /* We can use the cpu mem copy function because this is X86. */ |
afe722be VS |
1207 | vaddr = io_mapping_map_atomic_wc(mapping, base); |
1208 | unwritten = __copy_from_user_inatomic_nocache((void __force *)vaddr + offset, | |
0839ccb8 | 1209 | user_data, length); |
fe115628 CW |
1210 | io_mapping_unmap_atomic(vaddr); |
1211 | if (unwritten) { | |
afe722be VS |
1212 | vaddr = io_mapping_map_wc(mapping, base, PAGE_SIZE); |
1213 | unwritten = copy_from_user((void __force *)vaddr + offset, | |
1214 | user_data, length); | |
fe115628 CW |
1215 | io_mapping_unmap(vaddr); |
1216 | } | |
bb6dc8d9 | 1217 | |
bb6dc8d9 CW |
1218 | return unwritten; |
1219 | } | |
1220 | ||
3de09aa3 EA |
1221 | /** |
1222 | * This is the fast pwrite path, where we copy the data directly from the | |
1223 | * user into the GTT, uncached. | |
fe115628 | 1224 | * @obj: i915 GEM object |
14bb2c11 | 1225 | * @args: pwrite arguments structure |
3de09aa3 | 1226 | */ |
673a394b | 1227 | static int |
fe115628 CW |
1228 | i915_gem_gtt_pwrite_fast(struct drm_i915_gem_object *obj, |
1229 | const struct drm_i915_gem_pwrite *args) | |
673a394b | 1230 | { |
fe115628 | 1231 | struct drm_i915_private *i915 = to_i915(obj->base.dev); |
4f1959ee AS |
1232 | struct i915_ggtt *ggtt = &i915->ggtt; |
1233 | struct drm_mm_node node; | |
fe115628 CW |
1234 | struct i915_vma *vma; |
1235 | u64 remain, offset; | |
1236 | void __user *user_data; | |
4f1959ee | 1237 | int ret; |
b50a5371 | 1238 | |
fe115628 CW |
1239 | ret = mutex_lock_interruptible(&i915->drm.struct_mutex); |
1240 | if (ret) | |
1241 | return ret; | |
935aaa69 | 1242 | |
9c870d03 | 1243 | intel_runtime_pm_get(i915); |
058d88c4 | 1244 | vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, |
a3259ca9 CW |
1245 | PIN_MAPPABLE | |
1246 | PIN_NONFAULT | | |
1247 | PIN_NONBLOCK); | |
18034584 CW |
1248 | if (!IS_ERR(vma)) { |
1249 | node.start = i915_ggtt_offset(vma); | |
1250 | node.allocated = false; | |
49ef5294 | 1251 | ret = i915_vma_put_fence(vma); |
18034584 CW |
1252 | if (ret) { |
1253 | i915_vma_unpin(vma); | |
1254 | vma = ERR_PTR(ret); | |
1255 | } | |
1256 | } | |
058d88c4 | 1257 | if (IS_ERR(vma)) { |
bb6dc8d9 | 1258 | ret = insert_mappable_node(ggtt, &node, PAGE_SIZE); |
4f1959ee | 1259 | if (ret) |
fe115628 CW |
1260 | goto out_unlock; |
1261 | GEM_BUG_ON(!node.allocated); | |
4f1959ee | 1262 | } |
935aaa69 DV |
1263 | |
1264 | ret = i915_gem_object_set_to_gtt_domain(obj, true); | |
1265 | if (ret) | |
1266 | goto out_unpin; | |
1267 | ||
fe115628 CW |
1268 | mutex_unlock(&i915->drm.struct_mutex); |
1269 | ||
b19482d7 | 1270 | intel_fb_obj_invalidate(obj, ORIGIN_CPU); |
063e4e6b | 1271 | |
4f1959ee AS |
1272 | user_data = u64_to_user_ptr(args->data_ptr); |
1273 | offset = args->offset; | |
1274 | remain = args->size; | |
1275 | while (remain) { | |
673a394b EA |
1276 | /* Operation in this page |
1277 | * | |
0839ccb8 KP |
1278 | * page_base = page offset within aperture |
1279 | * page_offset = offset within page | |
1280 | * page_length = bytes to copy for this page | |
673a394b | 1281 | */ |
4f1959ee | 1282 | u32 page_base = node.start; |
bb6dc8d9 CW |
1283 | unsigned int page_offset = offset_in_page(offset); |
1284 | unsigned int page_length = PAGE_SIZE - page_offset; | |
4f1959ee AS |
1285 | page_length = remain < page_length ? remain : page_length; |
1286 | if (node.allocated) { | |
1287 | wmb(); /* flush the write before we modify the GGTT */ | |
1288 | ggtt->base.insert_page(&ggtt->base, | |
1289 | i915_gem_object_get_dma_address(obj, offset >> PAGE_SHIFT), | |
1290 | node.start, I915_CACHE_NONE, 0); | |
1291 | wmb(); /* flush modifications to the GGTT (insert_page) */ | |
1292 | } else { | |
1293 | page_base += offset & PAGE_MASK; | |
1294 | } | |
0839ccb8 | 1295 | /* If we get a fault while copying data, then (presumably) our |
3de09aa3 EA |
1296 | * source page isn't available. Return the error and we'll |
1297 | * retry in the slow path. | |
b50a5371 AS |
1298 | * If the object is non-shmem backed, we retry again with the |
1299 | * path that handles page fault. | |
0839ccb8 | 1300 | */ |
fe115628 CW |
1301 | if (ggtt_write(&ggtt->mappable, page_base, page_offset, |
1302 | user_data, page_length)) { | |
1303 | ret = -EFAULT; | |
1304 | break; | |
935aaa69 | 1305 | } |
673a394b | 1306 | |
0839ccb8 KP |
1307 | remain -= page_length; |
1308 | user_data += page_length; | |
1309 | offset += page_length; | |
673a394b | 1310 | } |
d59b21ec | 1311 | intel_fb_obj_flush(obj, ORIGIN_CPU); |
fe115628 CW |
1312 | |
1313 | mutex_lock(&i915->drm.struct_mutex); | |
935aaa69 | 1314 | out_unpin: |
4f1959ee AS |
1315 | if (node.allocated) { |
1316 | wmb(); | |
1317 | ggtt->base.clear_range(&ggtt->base, | |
4fb84d99 | 1318 | node.start, node.size); |
4f1959ee AS |
1319 | remove_mappable_node(&node); |
1320 | } else { | |
058d88c4 | 1321 | i915_vma_unpin(vma); |
4f1959ee | 1322 | } |
fe115628 | 1323 | out_unlock: |
9c870d03 | 1324 | intel_runtime_pm_put(i915); |
fe115628 | 1325 | mutex_unlock(&i915->drm.struct_mutex); |
3de09aa3 | 1326 | return ret; |
673a394b EA |
1327 | } |
1328 | ||
3043c60c | 1329 | static int |
fe115628 | 1330 | shmem_pwrite_slow(struct page *page, int offset, int length, |
d174bd64 DV |
1331 | char __user *user_data, |
1332 | bool page_do_bit17_swizzling, | |
1333 | bool needs_clflush_before, | |
1334 | bool needs_clflush_after) | |
673a394b | 1335 | { |
d174bd64 DV |
1336 | char *vaddr; |
1337 | int ret; | |
e5281ccd | 1338 | |
d174bd64 | 1339 | vaddr = kmap(page); |
e7e58eb5 | 1340 | if (unlikely(needs_clflush_before || page_do_bit17_swizzling)) |
fe115628 | 1341 | shmem_clflush_swizzled_range(vaddr + offset, length, |
23c18c71 | 1342 | page_do_bit17_swizzling); |
d174bd64 | 1343 | if (page_do_bit17_swizzling) |
fe115628 CW |
1344 | ret = __copy_from_user_swizzled(vaddr, offset, user_data, |
1345 | length); | |
d174bd64 | 1346 | else |
fe115628 | 1347 | ret = __copy_from_user(vaddr + offset, user_data, length); |
d174bd64 | 1348 | if (needs_clflush_after) |
fe115628 | 1349 | shmem_clflush_swizzled_range(vaddr + offset, length, |
23c18c71 | 1350 | page_do_bit17_swizzling); |
d174bd64 | 1351 | kunmap(page); |
40123c1f | 1352 | |
755d2218 | 1353 | return ret ? -EFAULT : 0; |
40123c1f EA |
1354 | } |
1355 | ||
fe115628 CW |
1356 | /* Per-page copy function for the shmem pwrite fastpath. |
1357 | * Flushes invalid cachelines before writing to the target if | |
1358 | * needs_clflush_before is set and flushes out any written cachelines after | |
1359 | * writing if needs_clflush is set. | |
1360 | */ | |
40123c1f | 1361 | static int |
fe115628 CW |
1362 | shmem_pwrite(struct page *page, int offset, int len, char __user *user_data, |
1363 | bool page_do_bit17_swizzling, | |
1364 | bool needs_clflush_before, | |
1365 | bool needs_clflush_after) | |
40123c1f | 1366 | { |
fe115628 CW |
1367 | int ret; |
1368 | ||
1369 | ret = -ENODEV; | |
1370 | if (!page_do_bit17_swizzling) { | |
1371 | char *vaddr = kmap_atomic(page); | |
1372 | ||
1373 | if (needs_clflush_before) | |
1374 | drm_clflush_virt_range(vaddr + offset, len); | |
1375 | ret = __copy_from_user_inatomic(vaddr + offset, user_data, len); | |
1376 | if (needs_clflush_after) | |
1377 | drm_clflush_virt_range(vaddr + offset, len); | |
1378 | ||
1379 | kunmap_atomic(vaddr); | |
1380 | } | |
1381 | if (ret == 0) | |
1382 | return ret; | |
1383 | ||
1384 | return shmem_pwrite_slow(page, offset, len, user_data, | |
1385 | page_do_bit17_swizzling, | |
1386 | needs_clflush_before, | |
1387 | needs_clflush_after); | |
1388 | } | |
1389 | ||
1390 | static int | |
1391 | i915_gem_shmem_pwrite(struct drm_i915_gem_object *obj, | |
1392 | const struct drm_i915_gem_pwrite *args) | |
1393 | { | |
1394 | struct drm_i915_private *i915 = to_i915(obj->base.dev); | |
1395 | void __user *user_data; | |
1396 | u64 remain; | |
1397 | unsigned int obj_do_bit17_swizzling; | |
1398 | unsigned int partial_cacheline_write; | |
43394c7d | 1399 | unsigned int needs_clflush; |
fe115628 CW |
1400 | unsigned int offset, idx; |
1401 | int ret; | |
40123c1f | 1402 | |
fe115628 | 1403 | ret = mutex_lock_interruptible(&i915->drm.struct_mutex); |
755d2218 CW |
1404 | if (ret) |
1405 | return ret; | |
1406 | ||
fe115628 CW |
1407 | ret = i915_gem_obj_prepare_shmem_write(obj, &needs_clflush); |
1408 | mutex_unlock(&i915->drm.struct_mutex); | |
1409 | if (ret) | |
1410 | return ret; | |
673a394b | 1411 | |
fe115628 CW |
1412 | obj_do_bit17_swizzling = 0; |
1413 | if (i915_gem_object_needs_bit17_swizzle(obj)) | |
1414 | obj_do_bit17_swizzling = BIT(17); | |
e5281ccd | 1415 | |
fe115628 CW |
1416 | /* If we don't overwrite a cacheline completely we need to be |
1417 | * careful to have up-to-date data by first clflushing. Don't | |
1418 | * overcomplicate things and flush the entire patch. | |
1419 | */ | |
1420 | partial_cacheline_write = 0; | |
1421 | if (needs_clflush & CLFLUSH_BEFORE) | |
1422 | partial_cacheline_write = boot_cpu_data.x86_clflush_size - 1; | |
9da3da66 | 1423 | |
fe115628 CW |
1424 | user_data = u64_to_user_ptr(args->data_ptr); |
1425 | remain = args->size; | |
1426 | offset = offset_in_page(args->offset); | |
1427 | for (idx = args->offset >> PAGE_SHIFT; remain; idx++) { | |
1428 | struct page *page = i915_gem_object_get_page(obj, idx); | |
1429 | int length; | |
40123c1f | 1430 | |
fe115628 CW |
1431 | length = remain; |
1432 | if (offset + length > PAGE_SIZE) | |
1433 | length = PAGE_SIZE - offset; | |
755d2218 | 1434 | |
fe115628 CW |
1435 | ret = shmem_pwrite(page, offset, length, user_data, |
1436 | page_to_phys(page) & obj_do_bit17_swizzling, | |
1437 | (offset | length) & partial_cacheline_write, | |
1438 | needs_clflush & CLFLUSH_AFTER); | |
755d2218 | 1439 | if (ret) |
fe115628 | 1440 | break; |
755d2218 | 1441 | |
fe115628 CW |
1442 | remain -= length; |
1443 | user_data += length; | |
1444 | offset = 0; | |
8c59967c | 1445 | } |
673a394b | 1446 | |
d59b21ec | 1447 | intel_fb_obj_flush(obj, ORIGIN_CPU); |
fe115628 | 1448 | i915_gem_obj_finish_shmem_access(obj); |
40123c1f | 1449 | return ret; |
673a394b EA |
1450 | } |
1451 | ||
1452 | /** | |
1453 | * Writes data to the object referenced by handle. | |
14bb2c11 TU |
1454 | * @dev: drm device |
1455 | * @data: ioctl data blob | |
1456 | * @file: drm file | |
673a394b EA |
1457 | * |
1458 | * On error, the contents of the buffer that were to be modified are undefined. | |
1459 | */ | |
1460 | int | |
1461 | i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, | |
fbd5a26d | 1462 | struct drm_file *file) |
673a394b EA |
1463 | { |
1464 | struct drm_i915_gem_pwrite *args = data; | |
05394f39 | 1465 | struct drm_i915_gem_object *obj; |
51311d0a CW |
1466 | int ret; |
1467 | ||
1468 | if (args->size == 0) | |
1469 | return 0; | |
1470 | ||
1471 | if (!access_ok(VERIFY_READ, | |
3ed605bc | 1472 | u64_to_user_ptr(args->data_ptr), |
51311d0a CW |
1473 | args->size)) |
1474 | return -EFAULT; | |
1475 | ||
03ac0642 | 1476 | obj = i915_gem_object_lookup(file, args->handle); |
258a5ede CW |
1477 | if (!obj) |
1478 | return -ENOENT; | |
673a394b | 1479 | |
7dcd2499 | 1480 | /* Bounds check destination. */ |
966d5bf5 | 1481 | if (range_overflows_t(u64, args->offset, args->size, obj->base.size)) { |
ce9d419d | 1482 | ret = -EINVAL; |
258a5ede | 1483 | goto err; |
ce9d419d CW |
1484 | } |
1485 | ||
db53a302 CW |
1486 | trace_i915_gem_object_pwrite(obj, args->offset, args->size); |
1487 | ||
7c55e2c5 CW |
1488 | ret = -ENODEV; |
1489 | if (obj->ops->pwrite) | |
1490 | ret = obj->ops->pwrite(obj, args); | |
1491 | if (ret != -ENODEV) | |
1492 | goto err; | |
1493 | ||
e95433c7 CW |
1494 | ret = i915_gem_object_wait(obj, |
1495 | I915_WAIT_INTERRUPTIBLE | | |
1496 | I915_WAIT_ALL, | |
1497 | MAX_SCHEDULE_TIMEOUT, | |
1498 | to_rps_client(file)); | |
258a5ede CW |
1499 | if (ret) |
1500 | goto err; | |
1501 | ||
fe115628 | 1502 | ret = i915_gem_object_pin_pages(obj); |
258a5ede | 1503 | if (ret) |
fe115628 | 1504 | goto err; |
258a5ede | 1505 | |
935aaa69 | 1506 | ret = -EFAULT; |
673a394b EA |
1507 | /* We can only do the GTT pwrite on untiled buffers, as otherwise |
1508 | * it would end up going through the fenced access, and we'll get | |
1509 | * different detiling behavior between reading and writing. | |
1510 | * pread/pwrite currently are reading and writing from the CPU | |
1511 | * perspective, requiring manual detiling by the client. | |
1512 | */ | |
6eae0059 | 1513 | if (!i915_gem_object_has_struct_page(obj) || |
9c870d03 | 1514 | cpu_write_needs_clflush(obj)) |
935aaa69 DV |
1515 | /* Note that the gtt paths might fail with non-page-backed user |
1516 | * pointers (e.g. gtt mappings when moving data between | |
9c870d03 CW |
1517 | * textures). Fallback to the shmem path in that case. |
1518 | */ | |
fe115628 | 1519 | ret = i915_gem_gtt_pwrite_fast(obj, args); |
673a394b | 1520 | |
d1054ee4 | 1521 | if (ret == -EFAULT || ret == -ENOSPC) { |
6a2c4232 CW |
1522 | if (obj->phys_handle) |
1523 | ret = i915_gem_phys_pwrite(obj, args, file); | |
b50a5371 | 1524 | else |
fe115628 | 1525 | ret = i915_gem_shmem_pwrite(obj, args); |
6a2c4232 | 1526 | } |
5c0480f2 | 1527 | |
fe115628 | 1528 | i915_gem_object_unpin_pages(obj); |
258a5ede | 1529 | err: |
f0cd5182 | 1530 | i915_gem_object_put(obj); |
258a5ede | 1531 | return ret; |
673a394b EA |
1532 | } |
1533 | ||
40e62d5d CW |
1534 | static void i915_gem_object_bump_inactive_ggtt(struct drm_i915_gem_object *obj) |
1535 | { | |
1536 | struct drm_i915_private *i915; | |
1537 | struct list_head *list; | |
1538 | struct i915_vma *vma; | |
1539 | ||
f2123818 CW |
1540 | GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj)); |
1541 | ||
40e62d5d CW |
1542 | list_for_each_entry(vma, &obj->vma_list, obj_link) { |
1543 | if (!i915_vma_is_ggtt(vma)) | |
28f412e0 | 1544 | break; |
40e62d5d CW |
1545 | |
1546 | if (i915_vma_is_active(vma)) | |
1547 | continue; | |
1548 | ||
1549 | if (!drm_mm_node_allocated(&vma->node)) | |
1550 | continue; | |
1551 | ||
1552 | list_move_tail(&vma->vm_link, &vma->vm->inactive_list); | |
1553 | } | |
1554 | ||
1555 | i915 = to_i915(obj->base.dev); | |
f2123818 | 1556 | spin_lock(&i915->mm.obj_lock); |
40e62d5d | 1557 | list = obj->bind_count ? &i915->mm.bound_list : &i915->mm.unbound_list; |
f2123818 CW |
1558 | list_move_tail(&obj->mm.link, list); |
1559 | spin_unlock(&i915->mm.obj_lock); | |
40e62d5d CW |
1560 | } |
1561 | ||
673a394b | 1562 | /** |
2ef7eeaa EA |
1563 | * Called when user space prepares to use an object with the CPU, either |
1564 | * through the mmap ioctl's mapping or a GTT mapping. | |
14bb2c11 TU |
1565 | * @dev: drm device |
1566 | * @data: ioctl data blob | |
1567 | * @file: drm file | |
673a394b EA |
1568 | */ |
1569 | int | |
1570 | i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1571 | struct drm_file *file) |
673a394b EA |
1572 | { |
1573 | struct drm_i915_gem_set_domain *args = data; | |
05394f39 | 1574 | struct drm_i915_gem_object *obj; |
2ef7eeaa EA |
1575 | uint32_t read_domains = args->read_domains; |
1576 | uint32_t write_domain = args->write_domain; | |
40e62d5d | 1577 | int err; |
673a394b | 1578 | |
2ef7eeaa | 1579 | /* Only handle setting domains to types used by the CPU. */ |
b8f9096d | 1580 | if ((write_domain | read_domains) & I915_GEM_GPU_DOMAINS) |
2ef7eeaa EA |
1581 | return -EINVAL; |
1582 | ||
1583 | /* Having something in the write domain implies it's in the read | |
1584 | * domain, and only that read domain. Enforce that in the request. | |
1585 | */ | |
1586 | if (write_domain != 0 && read_domains != write_domain) | |
1587 | return -EINVAL; | |
1588 | ||
03ac0642 | 1589 | obj = i915_gem_object_lookup(file, args->handle); |
b8f9096d CW |
1590 | if (!obj) |
1591 | return -ENOENT; | |
673a394b | 1592 | |
3236f57a CW |
1593 | /* Try to flush the object off the GPU without holding the lock. |
1594 | * We will repeat the flush holding the lock in the normal manner | |
1595 | * to catch cases where we are gazumped. | |
1596 | */ | |
40e62d5d | 1597 | err = i915_gem_object_wait(obj, |
e95433c7 CW |
1598 | I915_WAIT_INTERRUPTIBLE | |
1599 | (write_domain ? I915_WAIT_ALL : 0), | |
1600 | MAX_SCHEDULE_TIMEOUT, | |
1601 | to_rps_client(file)); | |
40e62d5d | 1602 | if (err) |
f0cd5182 | 1603 | goto out; |
b8f9096d | 1604 | |
40e62d5d CW |
1605 | /* Flush and acquire obj->pages so that we are coherent through |
1606 | * direct access in memory with previous cached writes through | |
1607 | * shmemfs and that our cache domain tracking remains valid. | |
1608 | * For example, if the obj->filp was moved to swap without us | |
1609 | * being notified and releasing the pages, we would mistakenly | |
1610 | * continue to assume that the obj remained out of the CPU cached | |
1611 | * domain. | |
1612 | */ | |
1613 | err = i915_gem_object_pin_pages(obj); | |
1614 | if (err) | |
f0cd5182 | 1615 | goto out; |
40e62d5d CW |
1616 | |
1617 | err = i915_mutex_lock_interruptible(dev); | |
1618 | if (err) | |
f0cd5182 | 1619 | goto out_unpin; |
3236f57a | 1620 | |
e22d8e3c CW |
1621 | if (read_domains & I915_GEM_DOMAIN_WC) |
1622 | err = i915_gem_object_set_to_wc_domain(obj, write_domain); | |
1623 | else if (read_domains & I915_GEM_DOMAIN_GTT) | |
1624 | err = i915_gem_object_set_to_gtt_domain(obj, write_domain); | |
43566ded | 1625 | else |
e22d8e3c | 1626 | err = i915_gem_object_set_to_cpu_domain(obj, write_domain); |
2ef7eeaa | 1627 | |
40e62d5d CW |
1628 | /* And bump the LRU for this access */ |
1629 | i915_gem_object_bump_inactive_ggtt(obj); | |
031b698a | 1630 | |
673a394b | 1631 | mutex_unlock(&dev->struct_mutex); |
b8f9096d | 1632 | |
40e62d5d | 1633 | if (write_domain != 0) |
ef74921b CW |
1634 | intel_fb_obj_invalidate(obj, |
1635 | fb_write_origin(obj, write_domain)); | |
40e62d5d | 1636 | |
f0cd5182 | 1637 | out_unpin: |
40e62d5d | 1638 | i915_gem_object_unpin_pages(obj); |
f0cd5182 CW |
1639 | out: |
1640 | i915_gem_object_put(obj); | |
40e62d5d | 1641 | return err; |
673a394b EA |
1642 | } |
1643 | ||
1644 | /** | |
1645 | * Called when user space has done writes to this buffer | |
14bb2c11 TU |
1646 | * @dev: drm device |
1647 | * @data: ioctl data blob | |
1648 | * @file: drm file | |
673a394b EA |
1649 | */ |
1650 | int | |
1651 | i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1652 | struct drm_file *file) |
673a394b EA |
1653 | { |
1654 | struct drm_i915_gem_sw_finish *args = data; | |
05394f39 | 1655 | struct drm_i915_gem_object *obj; |
1d7cfea1 | 1656 | |
03ac0642 | 1657 | obj = i915_gem_object_lookup(file, args->handle); |
c21724cc CW |
1658 | if (!obj) |
1659 | return -ENOENT; | |
673a394b | 1660 | |
673a394b | 1661 | /* Pinned buffers may be scanout, so flush the cache */ |
5a97bcc6 | 1662 | i915_gem_object_flush_if_display(obj); |
f0cd5182 | 1663 | i915_gem_object_put(obj); |
5a97bcc6 CW |
1664 | |
1665 | return 0; | |
673a394b EA |
1666 | } |
1667 | ||
1668 | /** | |
14bb2c11 TU |
1669 | * i915_gem_mmap_ioctl - Maps the contents of an object, returning the address |
1670 | * it is mapped to. | |
1671 | * @dev: drm device | |
1672 | * @data: ioctl data blob | |
1673 | * @file: drm file | |
673a394b EA |
1674 | * |
1675 | * While the mapping holds a reference on the contents of the object, it doesn't | |
1676 | * imply a ref on the object itself. | |
34367381 DV |
1677 | * |
1678 | * IMPORTANT: | |
1679 | * | |
1680 | * DRM driver writers who look a this function as an example for how to do GEM | |
1681 | * mmap support, please don't implement mmap support like here. The modern way | |
1682 | * to implement DRM mmap support is with an mmap offset ioctl (like | |
1683 | * i915_gem_mmap_gtt) and then using the mmap syscall on the DRM fd directly. | |
1684 | * That way debug tooling like valgrind will understand what's going on, hiding | |
1685 | * the mmap call in a driver private ioctl will break that. The i915 driver only | |
1686 | * does cpu mmaps this way because we didn't know better. | |
673a394b EA |
1687 | */ |
1688 | int | |
1689 | i915_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 1690 | struct drm_file *file) |
673a394b EA |
1691 | { |
1692 | struct drm_i915_gem_mmap *args = data; | |
03ac0642 | 1693 | struct drm_i915_gem_object *obj; |
673a394b EA |
1694 | unsigned long addr; |
1695 | ||
1816f923 AG |
1696 | if (args->flags & ~(I915_MMAP_WC)) |
1697 | return -EINVAL; | |
1698 | ||
568a58e5 | 1699 | if (args->flags & I915_MMAP_WC && !boot_cpu_has(X86_FEATURE_PAT)) |
1816f923 AG |
1700 | return -ENODEV; |
1701 | ||
03ac0642 CW |
1702 | obj = i915_gem_object_lookup(file, args->handle); |
1703 | if (!obj) | |
bf79cb91 | 1704 | return -ENOENT; |
673a394b | 1705 | |
1286ff73 DV |
1706 | /* prime objects have no backing filp to GEM mmap |
1707 | * pages from. | |
1708 | */ | |
03ac0642 | 1709 | if (!obj->base.filp) { |
f0cd5182 | 1710 | i915_gem_object_put(obj); |
1286ff73 DV |
1711 | return -EINVAL; |
1712 | } | |
1713 | ||
03ac0642 | 1714 | addr = vm_mmap(obj->base.filp, 0, args->size, |
673a394b EA |
1715 | PROT_READ | PROT_WRITE, MAP_SHARED, |
1716 | args->offset); | |
1816f923 AG |
1717 | if (args->flags & I915_MMAP_WC) { |
1718 | struct mm_struct *mm = current->mm; | |
1719 | struct vm_area_struct *vma; | |
1720 | ||
80a89a5e | 1721 | if (down_write_killable(&mm->mmap_sem)) { |
f0cd5182 | 1722 | i915_gem_object_put(obj); |
80a89a5e MH |
1723 | return -EINTR; |
1724 | } | |
1816f923 AG |
1725 | vma = find_vma(mm, addr); |
1726 | if (vma) | |
1727 | vma->vm_page_prot = | |
1728 | pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
1729 | else | |
1730 | addr = -ENOMEM; | |
1731 | up_write(&mm->mmap_sem); | |
aeecc969 CW |
1732 | |
1733 | /* This may race, but that's ok, it only gets set */ | |
50349247 | 1734 | WRITE_ONCE(obj->frontbuffer_ggtt_origin, ORIGIN_CPU); |
1816f923 | 1735 | } |
f0cd5182 | 1736 | i915_gem_object_put(obj); |
673a394b EA |
1737 | if (IS_ERR((void *)addr)) |
1738 | return addr; | |
1739 | ||
1740 | args->addr_ptr = (uint64_t) addr; | |
1741 | ||
1742 | return 0; | |
1743 | } | |
1744 | ||
03af84fe CW |
1745 | static unsigned int tile_row_pages(struct drm_i915_gem_object *obj) |
1746 | { | |
6649a0b6 | 1747 | return i915_gem_object_get_tile_row_size(obj) >> PAGE_SHIFT; |
03af84fe CW |
1748 | } |
1749 | ||
4cc69075 CW |
1750 | /** |
1751 | * i915_gem_mmap_gtt_version - report the current feature set for GTT mmaps | |
1752 | * | |
1753 | * A history of the GTT mmap interface: | |
1754 | * | |
1755 | * 0 - Everything had to fit into the GTT. Both parties of a memcpy had to | |
1756 | * aligned and suitable for fencing, and still fit into the available | |
1757 | * mappable space left by the pinned display objects. A classic problem | |
1758 | * we called the page-fault-of-doom where we would ping-pong between | |
1759 | * two objects that could not fit inside the GTT and so the memcpy | |
1760 | * would page one object in at the expense of the other between every | |
1761 | * single byte. | |
1762 | * | |
1763 | * 1 - Objects can be any size, and have any compatible fencing (X Y, or none | |
1764 | * as set via i915_gem_set_tiling() [DRM_I915_GEM_SET_TILING]). If the | |
1765 | * object is too large for the available space (or simply too large | |
1766 | * for the mappable aperture!), a view is created instead and faulted | |
1767 | * into userspace. (This view is aligned and sized appropriately for | |
1768 | * fenced access.) | |
1769 | * | |
e22d8e3c CW |
1770 | * 2 - Recognise WC as a separate cache domain so that we can flush the |
1771 | * delayed writes via GTT before performing direct access via WC. | |
1772 | * | |
4cc69075 CW |
1773 | * Restrictions: |
1774 | * | |
1775 | * * snoopable objects cannot be accessed via the GTT. It can cause machine | |
1776 | * hangs on some architectures, corruption on others. An attempt to service | |
1777 | * a GTT page fault from a snoopable object will generate a SIGBUS. | |
1778 | * | |
1779 | * * the object must be able to fit into RAM (physical memory, though no | |
1780 | * limited to the mappable aperture). | |
1781 | * | |
1782 | * | |
1783 | * Caveats: | |
1784 | * | |
1785 | * * a new GTT page fault will synchronize rendering from the GPU and flush | |
1786 | * all data to system memory. Subsequent access will not be synchronized. | |
1787 | * | |
1788 | * * all mappings are revoked on runtime device suspend. | |
1789 | * | |
1790 | * * there are only 8, 16 or 32 fence registers to share between all users | |
1791 | * (older machines require fence register for display and blitter access | |
1792 | * as well). Contention of the fence registers will cause the previous users | |
1793 | * to be unmapped and any new access will generate new page faults. | |
1794 | * | |
1795 | * * running out of memory while servicing a fault may generate a SIGBUS, | |
1796 | * rather than the expected SIGSEGV. | |
1797 | */ | |
1798 | int i915_gem_mmap_gtt_version(void) | |
1799 | { | |
e22d8e3c | 1800 | return 2; |
4cc69075 CW |
1801 | } |
1802 | ||
2d4281bb CW |
1803 | static inline struct i915_ggtt_view |
1804 | compute_partial_view(struct drm_i915_gem_object *obj, | |
2d4281bb CW |
1805 | pgoff_t page_offset, |
1806 | unsigned int chunk) | |
1807 | { | |
1808 | struct i915_ggtt_view view; | |
1809 | ||
1810 | if (i915_gem_object_is_tiled(obj)) | |
1811 | chunk = roundup(chunk, tile_row_pages(obj)); | |
1812 | ||
2d4281bb | 1813 | view.type = I915_GGTT_VIEW_PARTIAL; |
8bab1193 CW |
1814 | view.partial.offset = rounddown(page_offset, chunk); |
1815 | view.partial.size = | |
2d4281bb | 1816 | min_t(unsigned int, chunk, |
8bab1193 | 1817 | (obj->base.size >> PAGE_SHIFT) - view.partial.offset); |
2d4281bb CW |
1818 | |
1819 | /* If the partial covers the entire object, just create a normal VMA. */ | |
1820 | if (chunk >= obj->base.size >> PAGE_SHIFT) | |
1821 | view.type = I915_GGTT_VIEW_NORMAL; | |
1822 | ||
1823 | return view; | |
1824 | } | |
1825 | ||
de151cf6 JB |
1826 | /** |
1827 | * i915_gem_fault - fault a page into the GTT | |
d9072a3e | 1828 | * @vmf: fault info |
de151cf6 JB |
1829 | * |
1830 | * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped | |
1831 | * from userspace. The fault handler takes care of binding the object to | |
1832 | * the GTT (if needed), allocating and programming a fence register (again, | |
1833 | * only if needed based on whether the old reg is still valid or the object | |
1834 | * is tiled) and inserting a new PTE into the faulting process. | |
1835 | * | |
1836 | * Note that the faulting process may involve evicting existing objects | |
1837 | * from the GTT and/or fence registers to make room. So performance may | |
1838 | * suffer if the GTT working set is large or there are few fence registers | |
1839 | * left. | |
4cc69075 CW |
1840 | * |
1841 | * The current feature set supported by i915_gem_fault() and thus GTT mmaps | |
1842 | * is exposed via I915_PARAM_MMAP_GTT_VERSION (see i915_gem_mmap_gtt_version). | |
de151cf6 | 1843 | */ |
11bac800 | 1844 | int i915_gem_fault(struct vm_fault *vmf) |
de151cf6 | 1845 | { |
03af84fe | 1846 | #define MIN_CHUNK_PAGES ((1 << 20) >> PAGE_SHIFT) /* 1 MiB */ |
11bac800 | 1847 | struct vm_area_struct *area = vmf->vma; |
058d88c4 | 1848 | struct drm_i915_gem_object *obj = to_intel_bo(area->vm_private_data); |
05394f39 | 1849 | struct drm_device *dev = obj->base.dev; |
72e96d64 JL |
1850 | struct drm_i915_private *dev_priv = to_i915(dev); |
1851 | struct i915_ggtt *ggtt = &dev_priv->ggtt; | |
b8f9096d | 1852 | bool write = !!(vmf->flags & FAULT_FLAG_WRITE); |
058d88c4 | 1853 | struct i915_vma *vma; |
de151cf6 | 1854 | pgoff_t page_offset; |
82118877 | 1855 | unsigned int flags; |
b8f9096d | 1856 | int ret; |
f65c9168 | 1857 | |
de151cf6 | 1858 | /* We don't use vmf->pgoff since that has the fake offset */ |
1a29d85e | 1859 | page_offset = (vmf->address - area->vm_start) >> PAGE_SHIFT; |
de151cf6 | 1860 | |
db53a302 CW |
1861 | trace_i915_gem_object_fault(obj, page_offset, true, write); |
1862 | ||
6e4930f6 | 1863 | /* Try to flush the object off the GPU first without holding the lock. |
b8f9096d | 1864 | * Upon acquiring the lock, we will perform our sanity checks and then |
6e4930f6 CW |
1865 | * repeat the flush holding the lock in the normal manner to catch cases |
1866 | * where we are gazumped. | |
1867 | */ | |
e95433c7 CW |
1868 | ret = i915_gem_object_wait(obj, |
1869 | I915_WAIT_INTERRUPTIBLE, | |
1870 | MAX_SCHEDULE_TIMEOUT, | |
1871 | NULL); | |
6e4930f6 | 1872 | if (ret) |
b8f9096d CW |
1873 | goto err; |
1874 | ||
40e62d5d CW |
1875 | ret = i915_gem_object_pin_pages(obj); |
1876 | if (ret) | |
1877 | goto err; | |
1878 | ||
b8f9096d CW |
1879 | intel_runtime_pm_get(dev_priv); |
1880 | ||
1881 | ret = i915_mutex_lock_interruptible(dev); | |
1882 | if (ret) | |
1883 | goto err_rpm; | |
6e4930f6 | 1884 | |
eb119bd6 | 1885 | /* Access to snoopable pages through the GTT is incoherent. */ |
0031fb96 | 1886 | if (obj->cache_level != I915_CACHE_NONE && !HAS_LLC(dev_priv)) { |
ddeff6ee | 1887 | ret = -EFAULT; |
b8f9096d | 1888 | goto err_unlock; |
eb119bd6 CW |
1889 | } |
1890 | ||
82118877 CW |
1891 | /* If the object is smaller than a couple of partial vma, it is |
1892 | * not worth only creating a single partial vma - we may as well | |
1893 | * clear enough space for the full object. | |
1894 | */ | |
1895 | flags = PIN_MAPPABLE; | |
1896 | if (obj->base.size > 2 * MIN_CHUNK_PAGES << PAGE_SHIFT) | |
1897 | flags |= PIN_NONBLOCK | PIN_NONFAULT; | |
1898 | ||
a61007a8 | 1899 | /* Now pin it into the GTT as needed */ |
82118877 | 1900 | vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, flags); |
a61007a8 | 1901 | if (IS_ERR(vma)) { |
a61007a8 | 1902 | /* Use a partial view if it is bigger than available space */ |
2d4281bb | 1903 | struct i915_ggtt_view view = |
8201c1fa | 1904 | compute_partial_view(obj, page_offset, MIN_CHUNK_PAGES); |
aa136d9d | 1905 | |
50349247 CW |
1906 | /* Userspace is now writing through an untracked VMA, abandon |
1907 | * all hope that the hardware is able to track future writes. | |
1908 | */ | |
1909 | obj->frontbuffer_ggtt_origin = ORIGIN_CPU; | |
1910 | ||
a61007a8 CW |
1911 | vma = i915_gem_object_ggtt_pin(obj, &view, 0, 0, PIN_MAPPABLE); |
1912 | } | |
058d88c4 CW |
1913 | if (IS_ERR(vma)) { |
1914 | ret = PTR_ERR(vma); | |
b8f9096d | 1915 | goto err_unlock; |
058d88c4 | 1916 | } |
4a684a41 | 1917 | |
c9839303 CW |
1918 | ret = i915_gem_object_set_to_gtt_domain(obj, write); |
1919 | if (ret) | |
b8f9096d | 1920 | goto err_unpin; |
74898d7e | 1921 | |
3bd40735 | 1922 | ret = i915_vma_pin_fence(vma); |
d9e86c0e | 1923 | if (ret) |
b8f9096d | 1924 | goto err_unpin; |
7d1c4804 | 1925 | |
b90b91d8 | 1926 | /* Finally, remap it using the new GTT offset */ |
c58305af | 1927 | ret = remap_io_mapping(area, |
8bab1193 | 1928 | area->vm_start + (vma->ggtt_view.partial.offset << PAGE_SHIFT), |
c58305af CW |
1929 | (ggtt->mappable_base + vma->node.start) >> PAGE_SHIFT, |
1930 | min_t(u64, vma->size, area->vm_end - area->vm_start), | |
1931 | &ggtt->mappable); | |
a65adaf8 CW |
1932 | if (ret) |
1933 | goto err_fence; | |
a61007a8 | 1934 | |
a65adaf8 CW |
1935 | /* Mark as being mmapped into userspace for later revocation */ |
1936 | assert_rpm_wakelock_held(dev_priv); | |
1937 | if (!i915_vma_set_userfault(vma) && !obj->userfault_count++) | |
1938 | list_add(&obj->userfault_link, &dev_priv->mm.userfault_list); | |
1939 | GEM_BUG_ON(!obj->userfault_count); | |
1940 | ||
1941 | err_fence: | |
3bd40735 | 1942 | i915_vma_unpin_fence(vma); |
b8f9096d | 1943 | err_unpin: |
058d88c4 | 1944 | __i915_vma_unpin(vma); |
b8f9096d | 1945 | err_unlock: |
de151cf6 | 1946 | mutex_unlock(&dev->struct_mutex); |
b8f9096d CW |
1947 | err_rpm: |
1948 | intel_runtime_pm_put(dev_priv); | |
40e62d5d | 1949 | i915_gem_object_unpin_pages(obj); |
b8f9096d | 1950 | err: |
de151cf6 | 1951 | switch (ret) { |
d9bc7e9f | 1952 | case -EIO: |
2232f031 DV |
1953 | /* |
1954 | * We eat errors when the gpu is terminally wedged to avoid | |
1955 | * userspace unduly crashing (gl has no provisions for mmaps to | |
1956 | * fail). But any other -EIO isn't ours (e.g. swap in failure) | |
1957 | * and so needs to be reported. | |
1958 | */ | |
1959 | if (!i915_terminally_wedged(&dev_priv->gpu_error)) { | |
f65c9168 PZ |
1960 | ret = VM_FAULT_SIGBUS; |
1961 | break; | |
1962 | } | |
045e769a | 1963 | case -EAGAIN: |
571c608d DV |
1964 | /* |
1965 | * EAGAIN means the gpu is hung and we'll wait for the error | |
1966 | * handler to reset everything when re-faulting in | |
1967 | * i915_mutex_lock_interruptible. | |
d9bc7e9f | 1968 | */ |
c715089f CW |
1969 | case 0: |
1970 | case -ERESTARTSYS: | |
bed636ab | 1971 | case -EINTR: |
e79e0fe3 DR |
1972 | case -EBUSY: |
1973 | /* | |
1974 | * EBUSY is ok: this just means that another thread | |
1975 | * already did the job. | |
1976 | */ | |
f65c9168 PZ |
1977 | ret = VM_FAULT_NOPAGE; |
1978 | break; | |
de151cf6 | 1979 | case -ENOMEM: |
f65c9168 PZ |
1980 | ret = VM_FAULT_OOM; |
1981 | break; | |
a7c2e1aa | 1982 | case -ENOSPC: |
45d67817 | 1983 | case -EFAULT: |
f65c9168 PZ |
1984 | ret = VM_FAULT_SIGBUS; |
1985 | break; | |
de151cf6 | 1986 | default: |
a7c2e1aa | 1987 | WARN_ONCE(ret, "unhandled error in i915_gem_fault: %i\n", ret); |
f65c9168 PZ |
1988 | ret = VM_FAULT_SIGBUS; |
1989 | break; | |
de151cf6 | 1990 | } |
f65c9168 | 1991 | return ret; |
de151cf6 JB |
1992 | } |
1993 | ||
a65adaf8 CW |
1994 | static void __i915_gem_object_release_mmap(struct drm_i915_gem_object *obj) |
1995 | { | |
1996 | struct i915_vma *vma; | |
1997 | ||
1998 | GEM_BUG_ON(!obj->userfault_count); | |
1999 | ||
2000 | obj->userfault_count = 0; | |
2001 | list_del(&obj->userfault_link); | |
2002 | drm_vma_node_unmap(&obj->base.vma_node, | |
2003 | obj->base.dev->anon_inode->i_mapping); | |
2004 | ||
2005 | list_for_each_entry(vma, &obj->vma_list, obj_link) { | |
2006 | if (!i915_vma_is_ggtt(vma)) | |
2007 | break; | |
2008 | ||
2009 | i915_vma_unset_userfault(vma); | |
2010 | } | |
2011 | } | |
2012 | ||
901782b2 CW |
2013 | /** |
2014 | * i915_gem_release_mmap - remove physical page mappings | |
2015 | * @obj: obj in question | |
2016 | * | |
af901ca1 | 2017 | * Preserve the reservation of the mmapping with the DRM core code, but |
901782b2 CW |
2018 | * relinquish ownership of the pages back to the system. |
2019 | * | |
2020 | * It is vital that we remove the page mapping if we have mapped a tiled | |
2021 | * object through the GTT and then lose the fence register due to | |
2022 | * resource pressure. Similarly if the object has been moved out of the | |
2023 | * aperture, than pages mapped into userspace must be revoked. Removing the | |
2024 | * mapping will then trigger a page fault on the next user access, allowing | |
2025 | * fixup by i915_gem_fault(). | |
2026 | */ | |
d05ca301 | 2027 | void |
05394f39 | 2028 | i915_gem_release_mmap(struct drm_i915_gem_object *obj) |
901782b2 | 2029 | { |
275f039d | 2030 | struct drm_i915_private *i915 = to_i915(obj->base.dev); |
275f039d | 2031 | |
349f2ccf CW |
2032 | /* Serialisation between user GTT access and our code depends upon |
2033 | * revoking the CPU's PTE whilst the mutex is held. The next user | |
2034 | * pagefault then has to wait until we release the mutex. | |
9c870d03 CW |
2035 | * |
2036 | * Note that RPM complicates somewhat by adding an additional | |
2037 | * requirement that operations to the GGTT be made holding the RPM | |
2038 | * wakeref. | |
349f2ccf | 2039 | */ |
275f039d | 2040 | lockdep_assert_held(&i915->drm.struct_mutex); |
9c870d03 | 2041 | intel_runtime_pm_get(i915); |
349f2ccf | 2042 | |
a65adaf8 | 2043 | if (!obj->userfault_count) |
9c870d03 | 2044 | goto out; |
901782b2 | 2045 | |
a65adaf8 | 2046 | __i915_gem_object_release_mmap(obj); |
349f2ccf CW |
2047 | |
2048 | /* Ensure that the CPU's PTE are revoked and there are not outstanding | |
2049 | * memory transactions from userspace before we return. The TLB | |
2050 | * flushing implied above by changing the PTE above *should* be | |
2051 | * sufficient, an extra barrier here just provides us with a bit | |
2052 | * of paranoid documentation about our requirement to serialise | |
2053 | * memory writes before touching registers / GSM. | |
2054 | */ | |
2055 | wmb(); | |
9c870d03 CW |
2056 | |
2057 | out: | |
2058 | intel_runtime_pm_put(i915); | |
901782b2 CW |
2059 | } |
2060 | ||
7c108fd8 | 2061 | void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv) |
eedd10f4 | 2062 | { |
3594a3e2 | 2063 | struct drm_i915_gem_object *obj, *on; |
7c108fd8 | 2064 | int i; |
eedd10f4 | 2065 | |
3594a3e2 CW |
2066 | /* |
2067 | * Only called during RPM suspend. All users of the userfault_list | |
2068 | * must be holding an RPM wakeref to ensure that this can not | |
2069 | * run concurrently with themselves (and use the struct_mutex for | |
2070 | * protection between themselves). | |
2071 | */ | |
275f039d | 2072 | |
3594a3e2 | 2073 | list_for_each_entry_safe(obj, on, |
a65adaf8 CW |
2074 | &dev_priv->mm.userfault_list, userfault_link) |
2075 | __i915_gem_object_release_mmap(obj); | |
7c108fd8 CW |
2076 | |
2077 | /* The fence will be lost when the device powers down. If any were | |
2078 | * in use by hardware (i.e. they are pinned), we should not be powering | |
2079 | * down! All other fences will be reacquired by the user upon waking. | |
2080 | */ | |
2081 | for (i = 0; i < dev_priv->num_fence_regs; i++) { | |
2082 | struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i]; | |
2083 | ||
e0ec3ec6 CW |
2084 | /* Ideally we want to assert that the fence register is not |
2085 | * live at this point (i.e. that no piece of code will be | |
2086 | * trying to write through fence + GTT, as that both violates | |
2087 | * our tracking of activity and associated locking/barriers, | |
2088 | * but also is illegal given that the hw is powered down). | |
2089 | * | |
2090 | * Previously we used reg->pin_count as a "liveness" indicator. | |
2091 | * That is not sufficient, and we need a more fine-grained | |
2092 | * tool if we want to have a sanity check here. | |
2093 | */ | |
7c108fd8 CW |
2094 | |
2095 | if (!reg->vma) | |
2096 | continue; | |
2097 | ||
a65adaf8 | 2098 | GEM_BUG_ON(i915_vma_has_userfault(reg->vma)); |
7c108fd8 CW |
2099 | reg->dirty = true; |
2100 | } | |
eedd10f4 CW |
2101 | } |
2102 | ||
d8cb5086 CW |
2103 | static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj) |
2104 | { | |
fac5e23e | 2105 | struct drm_i915_private *dev_priv = to_i915(obj->base.dev); |
f3f6184c | 2106 | int err; |
da494d7c | 2107 | |
f3f6184c | 2108 | err = drm_gem_create_mmap_offset(&obj->base); |
b42a13d9 | 2109 | if (likely(!err)) |
f3f6184c | 2110 | return 0; |
d8cb5086 | 2111 | |
b42a13d9 CW |
2112 | /* Attempt to reap some mmap space from dead objects */ |
2113 | do { | |
2114 | err = i915_gem_wait_for_idle(dev_priv, I915_WAIT_INTERRUPTIBLE); | |
2115 | if (err) | |
2116 | break; | |
f3f6184c | 2117 | |
b42a13d9 | 2118 | i915_gem_drain_freed_objects(dev_priv); |
f3f6184c | 2119 | err = drm_gem_create_mmap_offset(&obj->base); |
b42a13d9 CW |
2120 | if (!err) |
2121 | break; | |
2122 | ||
2123 | } while (flush_delayed_work(&dev_priv->gt.retire_work)); | |
da494d7c | 2124 | |
f3f6184c | 2125 | return err; |
d8cb5086 CW |
2126 | } |
2127 | ||
2128 | static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object *obj) | |
2129 | { | |
d8cb5086 CW |
2130 | drm_gem_free_mmap_offset(&obj->base); |
2131 | } | |
2132 | ||
da6b51d0 | 2133 | int |
ff72145b DA |
2134 | i915_gem_mmap_gtt(struct drm_file *file, |
2135 | struct drm_device *dev, | |
da6b51d0 | 2136 | uint32_t handle, |
ff72145b | 2137 | uint64_t *offset) |
de151cf6 | 2138 | { |
05394f39 | 2139 | struct drm_i915_gem_object *obj; |
de151cf6 JB |
2140 | int ret; |
2141 | ||
03ac0642 | 2142 | obj = i915_gem_object_lookup(file, handle); |
f3f6184c CW |
2143 | if (!obj) |
2144 | return -ENOENT; | |
ab18282d | 2145 | |
d8cb5086 | 2146 | ret = i915_gem_object_create_mmap_offset(obj); |
f3f6184c CW |
2147 | if (ret == 0) |
2148 | *offset = drm_vma_node_offset_addr(&obj->base.vma_node); | |
de151cf6 | 2149 | |
f0cd5182 | 2150 | i915_gem_object_put(obj); |
1d7cfea1 | 2151 | return ret; |
de151cf6 JB |
2152 | } |
2153 | ||
ff72145b DA |
2154 | /** |
2155 | * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing | |
2156 | * @dev: DRM device | |
2157 | * @data: GTT mapping ioctl data | |
2158 | * @file: GEM object info | |
2159 | * | |
2160 | * Simply returns the fake offset to userspace so it can mmap it. | |
2161 | * The mmap call will end up in drm_gem_mmap(), which will set things | |
2162 | * up so we can get faults in the handler above. | |
2163 | * | |
2164 | * The fault handler will take care of binding the object into the GTT | |
2165 | * (since it may have been evicted to make room for something), allocating | |
2166 | * a fence register, and mapping the appropriate aperture address into | |
2167 | * userspace. | |
2168 | */ | |
2169 | int | |
2170 | i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, | |
2171 | struct drm_file *file) | |
2172 | { | |
2173 | struct drm_i915_gem_mmap_gtt *args = data; | |
2174 | ||
da6b51d0 | 2175 | return i915_gem_mmap_gtt(file, dev, args->handle, &args->offset); |
ff72145b DA |
2176 | } |
2177 | ||
225067ee DV |
2178 | /* Immediately discard the backing storage */ |
2179 | static void | |
2180 | i915_gem_object_truncate(struct drm_i915_gem_object *obj) | |
e5281ccd | 2181 | { |
4d6294bf | 2182 | i915_gem_object_free_mmap_offset(obj); |
1286ff73 | 2183 | |
4d6294bf CW |
2184 | if (obj->base.filp == NULL) |
2185 | return; | |
e5281ccd | 2186 | |
225067ee DV |
2187 | /* Our goal here is to return as much of the memory as |
2188 | * is possible back to the system as we are called from OOM. | |
2189 | * To do this we must instruct the shmfs to drop all of its | |
2190 | * backing pages, *now*. | |
2191 | */ | |
5537252b | 2192 | shmem_truncate_range(file_inode(obj->base.filp), 0, (loff_t)-1); |
a4f5ea64 | 2193 | obj->mm.madv = __I915_MADV_PURGED; |
4e5462ee | 2194 | obj->mm.pages = ERR_PTR(-EFAULT); |
225067ee | 2195 | } |
e5281ccd | 2196 | |
5537252b | 2197 | /* Try to discard unwanted pages */ |
03ac84f1 | 2198 | void __i915_gem_object_invalidate(struct drm_i915_gem_object *obj) |
225067ee | 2199 | { |
5537252b CW |
2200 | struct address_space *mapping; |
2201 | ||
1233e2db | 2202 | lockdep_assert_held(&obj->mm.lock); |
f1fa4f44 | 2203 | GEM_BUG_ON(i915_gem_object_has_pages(obj)); |
1233e2db | 2204 | |
a4f5ea64 | 2205 | switch (obj->mm.madv) { |
5537252b CW |
2206 | case I915_MADV_DONTNEED: |
2207 | i915_gem_object_truncate(obj); | |
2208 | case __I915_MADV_PURGED: | |
2209 | return; | |
2210 | } | |
2211 | ||
2212 | if (obj->base.filp == NULL) | |
2213 | return; | |
2214 | ||
93c76a3d | 2215 | mapping = obj->base.filp->f_mapping, |
5537252b | 2216 | invalidate_mapping_pages(mapping, 0, (loff_t)-1); |
e5281ccd CW |
2217 | } |
2218 | ||
5cdf5881 | 2219 | static void |
03ac84f1 CW |
2220 | i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj, |
2221 | struct sg_table *pages) | |
673a394b | 2222 | { |
85d1225e DG |
2223 | struct sgt_iter sgt_iter; |
2224 | struct page *page; | |
1286ff73 | 2225 | |
e5facdf9 | 2226 | __i915_gem_object_release_shmem(obj, pages, true); |
673a394b | 2227 | |
03ac84f1 | 2228 | i915_gem_gtt_finish_pages(obj, pages); |
e2273302 | 2229 | |
6dacfd2f | 2230 | if (i915_gem_object_needs_bit17_swizzle(obj)) |
03ac84f1 | 2231 | i915_gem_object_save_bit_17_swizzle(obj, pages); |
280b713b | 2232 | |
03ac84f1 | 2233 | for_each_sgt_page(page, sgt_iter, pages) { |
a4f5ea64 | 2234 | if (obj->mm.dirty) |
9da3da66 | 2235 | set_page_dirty(page); |
3ef94daa | 2236 | |
a4f5ea64 | 2237 | if (obj->mm.madv == I915_MADV_WILLNEED) |
9da3da66 | 2238 | mark_page_accessed(page); |
3ef94daa | 2239 | |
09cbfeaf | 2240 | put_page(page); |
3ef94daa | 2241 | } |
a4f5ea64 | 2242 | obj->mm.dirty = false; |
673a394b | 2243 | |
03ac84f1 CW |
2244 | sg_free_table(pages); |
2245 | kfree(pages); | |
37e680a1 | 2246 | } |
6c085a72 | 2247 | |
96d77634 CW |
2248 | static void __i915_gem_object_reset_page_iter(struct drm_i915_gem_object *obj) |
2249 | { | |
2250 | struct radix_tree_iter iter; | |
c23aa71b | 2251 | void __rcu **slot; |
96d77634 | 2252 | |
a4f5ea64 CW |
2253 | radix_tree_for_each_slot(slot, &obj->mm.get_page.radix, &iter, 0) |
2254 | radix_tree_delete(&obj->mm.get_page.radix, iter.index); | |
96d77634 CW |
2255 | } |
2256 | ||
548625ee CW |
2257 | void __i915_gem_object_put_pages(struct drm_i915_gem_object *obj, |
2258 | enum i915_mm_subclass subclass) | |
37e680a1 | 2259 | { |
f2123818 | 2260 | struct drm_i915_private *i915 = to_i915(obj->base.dev); |
03ac84f1 | 2261 | struct sg_table *pages; |
37e680a1 | 2262 | |
a4f5ea64 | 2263 | if (i915_gem_object_has_pinned_pages(obj)) |
03ac84f1 | 2264 | return; |
a5570178 | 2265 | |
15717de2 | 2266 | GEM_BUG_ON(obj->bind_count); |
f1fa4f44 | 2267 | if (!i915_gem_object_has_pages(obj)) |
1233e2db CW |
2268 | return; |
2269 | ||
2270 | /* May be called by shrinker from within get_pages() (on another bo) */ | |
548625ee | 2271 | mutex_lock_nested(&obj->mm.lock, subclass); |
1233e2db CW |
2272 | if (unlikely(atomic_read(&obj->mm.pages_pin_count))) |
2273 | goto unlock; | |
3e123027 | 2274 | |
a2165e31 CW |
2275 | /* ->put_pages might need to allocate memory for the bit17 swizzle |
2276 | * array, hence protect them from being reaped by removing them from gtt | |
2277 | * lists early. */ | |
03ac84f1 CW |
2278 | pages = fetch_and_zero(&obj->mm.pages); |
2279 | GEM_BUG_ON(!pages); | |
a2165e31 | 2280 | |
f2123818 CW |
2281 | spin_lock(&i915->mm.obj_lock); |
2282 | list_del(&obj->mm.link); | |
2283 | spin_unlock(&i915->mm.obj_lock); | |
2284 | ||
a4f5ea64 | 2285 | if (obj->mm.mapping) { |
4b30cb23 CW |
2286 | void *ptr; |
2287 | ||
0ce81788 | 2288 | ptr = page_mask_bits(obj->mm.mapping); |
4b30cb23 CW |
2289 | if (is_vmalloc_addr(ptr)) |
2290 | vunmap(ptr); | |
fb8621d3 | 2291 | else |
4b30cb23 CW |
2292 | kunmap(kmap_to_page(ptr)); |
2293 | ||
a4f5ea64 | 2294 | obj->mm.mapping = NULL; |
0a798eb9 CW |
2295 | } |
2296 | ||
96d77634 CW |
2297 | __i915_gem_object_reset_page_iter(obj); |
2298 | ||
4e5462ee CW |
2299 | if (!IS_ERR(pages)) |
2300 | obj->ops->put_pages(obj, pages); | |
2301 | ||
a5c08166 MA |
2302 | obj->mm.page_sizes.phys = obj->mm.page_sizes.sg = 0; |
2303 | ||
1233e2db CW |
2304 | unlock: |
2305 | mutex_unlock(&obj->mm.lock); | |
6c085a72 CW |
2306 | } |
2307 | ||
935a2f77 | 2308 | static bool i915_sg_trim(struct sg_table *orig_st) |
0c40ce13 TU |
2309 | { |
2310 | struct sg_table new_st; | |
2311 | struct scatterlist *sg, *new_sg; | |
2312 | unsigned int i; | |
2313 | ||
2314 | if (orig_st->nents == orig_st->orig_nents) | |
935a2f77 | 2315 | return false; |
0c40ce13 | 2316 | |
8bfc478f | 2317 | if (sg_alloc_table(&new_st, orig_st->nents, GFP_KERNEL | __GFP_NOWARN)) |
935a2f77 | 2318 | return false; |
0c40ce13 TU |
2319 | |
2320 | new_sg = new_st.sgl; | |
2321 | for_each_sg(orig_st->sgl, sg, orig_st->nents, i) { | |
2322 | sg_set_page(new_sg, sg_page(sg), sg->length, 0); | |
2323 | /* called before being DMA mapped, no need to copy sg->dma_* */ | |
2324 | new_sg = sg_next(new_sg); | |
2325 | } | |
c2dc6cc9 | 2326 | GEM_BUG_ON(new_sg); /* Should walk exactly nents and hit the end */ |
0c40ce13 TU |
2327 | |
2328 | sg_free_table(orig_st); | |
2329 | ||
2330 | *orig_st = new_st; | |
935a2f77 | 2331 | return true; |
0c40ce13 TU |
2332 | } |
2333 | ||
b91b09ee | 2334 | static int i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) |
e5281ccd | 2335 | { |
fac5e23e | 2336 | struct drm_i915_private *dev_priv = to_i915(obj->base.dev); |
d766ef53 CW |
2337 | const unsigned long page_count = obj->base.size / PAGE_SIZE; |
2338 | unsigned long i; | |
e5281ccd | 2339 | struct address_space *mapping; |
9da3da66 CW |
2340 | struct sg_table *st; |
2341 | struct scatterlist *sg; | |
85d1225e | 2342 | struct sgt_iter sgt_iter; |
e5281ccd | 2343 | struct page *page; |
90797e6d | 2344 | unsigned long last_pfn = 0; /* suppress gcc warning */ |
5602452e | 2345 | unsigned int max_segment = i915_sg_segment_size(); |
84e8978e | 2346 | unsigned int sg_page_sizes; |
4846bf0c | 2347 | gfp_t noreclaim; |
e2273302 | 2348 | int ret; |
e5281ccd | 2349 | |
6c085a72 CW |
2350 | /* Assert that the object is not currently in any GPU domain. As it |
2351 | * wasn't in the GTT, there shouldn't be any way it could have been in | |
2352 | * a GPU cache | |
2353 | */ | |
03ac84f1 CW |
2354 | GEM_BUG_ON(obj->base.read_domains & I915_GEM_GPU_DOMAINS); |
2355 | GEM_BUG_ON(obj->base.write_domain & I915_GEM_GPU_DOMAINS); | |
6c085a72 | 2356 | |
9da3da66 CW |
2357 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
2358 | if (st == NULL) | |
b91b09ee | 2359 | return -ENOMEM; |
9da3da66 | 2360 | |
d766ef53 | 2361 | rebuild_st: |
9da3da66 | 2362 | if (sg_alloc_table(st, page_count, GFP_KERNEL)) { |
9da3da66 | 2363 | kfree(st); |
b91b09ee | 2364 | return -ENOMEM; |
9da3da66 | 2365 | } |
e5281ccd | 2366 | |
9da3da66 CW |
2367 | /* Get the list of pages out of our struct file. They'll be pinned |
2368 | * at this point until we release them. | |
2369 | * | |
2370 | * Fail silently without starting the shrinker | |
2371 | */ | |
93c76a3d | 2372 | mapping = obj->base.filp->f_mapping; |
0f6ab55d | 2373 | noreclaim = mapping_gfp_constraint(mapping, ~__GFP_RECLAIM); |
4846bf0c CW |
2374 | noreclaim |= __GFP_NORETRY | __GFP_NOWARN; |
2375 | ||
90797e6d ID |
2376 | sg = st->sgl; |
2377 | st->nents = 0; | |
84e8978e | 2378 | sg_page_sizes = 0; |
90797e6d | 2379 | for (i = 0; i < page_count; i++) { |
4846bf0c CW |
2380 | const unsigned int shrink[] = { |
2381 | I915_SHRINK_BOUND | I915_SHRINK_UNBOUND | I915_SHRINK_PURGEABLE, | |
2382 | 0, | |
2383 | }, *s = shrink; | |
2384 | gfp_t gfp = noreclaim; | |
2385 | ||
2386 | do { | |
6c085a72 | 2387 | page = shmem_read_mapping_page_gfp(mapping, i, gfp); |
4846bf0c CW |
2388 | if (likely(!IS_ERR(page))) |
2389 | break; | |
2390 | ||
2391 | if (!*s) { | |
2392 | ret = PTR_ERR(page); | |
2393 | goto err_sg; | |
2394 | } | |
2395 | ||
912d572d | 2396 | i915_gem_shrink(dev_priv, 2 * page_count, NULL, *s++); |
4846bf0c | 2397 | cond_resched(); |
24f8e00a | 2398 | |
6c085a72 CW |
2399 | /* We've tried hard to allocate the memory by reaping |
2400 | * our own buffer, now let the real VM do its job and | |
2401 | * go down in flames if truly OOM. | |
24f8e00a CW |
2402 | * |
2403 | * However, since graphics tend to be disposable, | |
2404 | * defer the oom here by reporting the ENOMEM back | |
2405 | * to userspace. | |
6c085a72 | 2406 | */ |
4846bf0c CW |
2407 | if (!*s) { |
2408 | /* reclaim and warn, but no oom */ | |
2409 | gfp = mapping_gfp_mask(mapping); | |
eaf41801 CW |
2410 | |
2411 | /* Our bo are always dirty and so we require | |
2412 | * kswapd to reclaim our pages (direct reclaim | |
2413 | * does not effectively begin pageout of our | |
2414 | * buffers on its own). However, direct reclaim | |
2415 | * only waits for kswapd when under allocation | |
2416 | * congestion. So as a result __GFP_RECLAIM is | |
2417 | * unreliable and fails to actually reclaim our | |
2418 | * dirty pages -- unless you try over and over | |
2419 | * again with !__GFP_NORETRY. However, we still | |
2420 | * want to fail this allocation rather than | |
2421 | * trigger the out-of-memory killer and for | |
dbb32956 | 2422 | * this we want __GFP_RETRY_MAYFAIL. |
eaf41801 | 2423 | */ |
dbb32956 | 2424 | gfp |= __GFP_RETRY_MAYFAIL; |
e2273302 | 2425 | } |
4846bf0c CW |
2426 | } while (1); |
2427 | ||
871dfbd6 CW |
2428 | if (!i || |
2429 | sg->length >= max_segment || | |
2430 | page_to_pfn(page) != last_pfn + 1) { | |
a5c08166 | 2431 | if (i) { |
84e8978e | 2432 | sg_page_sizes |= sg->length; |
90797e6d | 2433 | sg = sg_next(sg); |
a5c08166 | 2434 | } |
90797e6d ID |
2435 | st->nents++; |
2436 | sg_set_page(sg, page, PAGE_SIZE, 0); | |
2437 | } else { | |
2438 | sg->length += PAGE_SIZE; | |
2439 | } | |
2440 | last_pfn = page_to_pfn(page); | |
3bbbe706 DV |
2441 | |
2442 | /* Check that the i965g/gm workaround works. */ | |
2443 | WARN_ON((gfp & __GFP_DMA32) && (last_pfn >= 0x00100000UL)); | |
e5281ccd | 2444 | } |
a5c08166 | 2445 | if (sg) { /* loop terminated early; short sg table */ |
84e8978e | 2446 | sg_page_sizes |= sg->length; |
426729dc | 2447 | sg_mark_end(sg); |
a5c08166 | 2448 | } |
74ce6b6c | 2449 | |
0c40ce13 TU |
2450 | /* Trim unused sg entries to avoid wasting memory. */ |
2451 | i915_sg_trim(st); | |
2452 | ||
03ac84f1 | 2453 | ret = i915_gem_gtt_prepare_pages(obj, st); |
d766ef53 CW |
2454 | if (ret) { |
2455 | /* DMA remapping failed? One possible cause is that | |
2456 | * it could not reserve enough large entries, asking | |
2457 | * for PAGE_SIZE chunks instead may be helpful. | |
2458 | */ | |
2459 | if (max_segment > PAGE_SIZE) { | |
2460 | for_each_sgt_page(page, sgt_iter, st) | |
2461 | put_page(page); | |
2462 | sg_free_table(st); | |
2463 | ||
2464 | max_segment = PAGE_SIZE; | |
2465 | goto rebuild_st; | |
2466 | } else { | |
2467 | dev_warn(&dev_priv->drm.pdev->dev, | |
2468 | "Failed to DMA remap %lu pages\n", | |
2469 | page_count); | |
2470 | goto err_pages; | |
2471 | } | |
2472 | } | |
e2273302 | 2473 | |
6dacfd2f | 2474 | if (i915_gem_object_needs_bit17_swizzle(obj)) |
03ac84f1 | 2475 | i915_gem_object_do_bit_17_swizzle(obj, st); |
e5281ccd | 2476 | |
84e8978e | 2477 | __i915_gem_object_set_pages(obj, st, sg_page_sizes); |
b91b09ee MA |
2478 | |
2479 | return 0; | |
e5281ccd | 2480 | |
b17993b7 | 2481 | err_sg: |
90797e6d | 2482 | sg_mark_end(sg); |
b17993b7 | 2483 | err_pages: |
85d1225e DG |
2484 | for_each_sgt_page(page, sgt_iter, st) |
2485 | put_page(page); | |
9da3da66 CW |
2486 | sg_free_table(st); |
2487 | kfree(st); | |
0820baf3 CW |
2488 | |
2489 | /* shmemfs first checks if there is enough memory to allocate the page | |
2490 | * and reports ENOSPC should there be insufficient, along with the usual | |
2491 | * ENOMEM for a genuine allocation failure. | |
2492 | * | |
2493 | * We use ENOSPC in our driver to mean that we have run out of aperture | |
2494 | * space and so want to translate the error from shmemfs back to our | |
2495 | * usual understanding of ENOMEM. | |
2496 | */ | |
e2273302 ID |
2497 | if (ret == -ENOSPC) |
2498 | ret = -ENOMEM; | |
2499 | ||
b91b09ee | 2500 | return ret; |
03ac84f1 CW |
2501 | } |
2502 | ||
2503 | void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj, | |
a5c08166 | 2504 | struct sg_table *pages, |
84e8978e | 2505 | unsigned int sg_page_sizes) |
03ac84f1 | 2506 | { |
a5c08166 MA |
2507 | struct drm_i915_private *i915 = to_i915(obj->base.dev); |
2508 | unsigned long supported = INTEL_INFO(i915)->page_sizes; | |
2509 | int i; | |
2510 | ||
1233e2db | 2511 | lockdep_assert_held(&obj->mm.lock); |
03ac84f1 CW |
2512 | |
2513 | obj->mm.get_page.sg_pos = pages->sgl; | |
2514 | obj->mm.get_page.sg_idx = 0; | |
2515 | ||
2516 | obj->mm.pages = pages; | |
2c3a3f44 CW |
2517 | |
2518 | if (i915_gem_object_is_tiled(obj) && | |
f2123818 | 2519 | i915->quirks & QUIRK_PIN_SWIZZLED_PAGES) { |
2c3a3f44 CW |
2520 | GEM_BUG_ON(obj->mm.quirked); |
2521 | __i915_gem_object_pin_pages(obj); | |
2522 | obj->mm.quirked = true; | |
2523 | } | |
a5c08166 | 2524 | |
84e8978e MA |
2525 | GEM_BUG_ON(!sg_page_sizes); |
2526 | obj->mm.page_sizes.phys = sg_page_sizes; | |
a5c08166 MA |
2527 | |
2528 | /* | |
84e8978e MA |
2529 | * Calculate the supported page-sizes which fit into the given |
2530 | * sg_page_sizes. This will give us the page-sizes which we may be able | |
2531 | * to use opportunistically when later inserting into the GTT. For | |
2532 | * example if phys=2G, then in theory we should be able to use 1G, 2M, | |
2533 | * 64K or 4K pages, although in practice this will depend on a number of | |
2534 | * other factors. | |
a5c08166 MA |
2535 | */ |
2536 | obj->mm.page_sizes.sg = 0; | |
2537 | for_each_set_bit(i, &supported, ilog2(I915_GTT_MAX_PAGE_SIZE) + 1) { | |
2538 | if (obj->mm.page_sizes.phys & ~0u << i) | |
2539 | obj->mm.page_sizes.sg |= BIT(i); | |
2540 | } | |
a5c08166 | 2541 | GEM_BUG_ON(!HAS_PAGE_SIZES(i915, obj->mm.page_sizes.sg)); |
f2123818 CW |
2542 | |
2543 | spin_lock(&i915->mm.obj_lock); | |
2544 | list_add(&obj->mm.link, &i915->mm.unbound_list); | |
2545 | spin_unlock(&i915->mm.obj_lock); | |
03ac84f1 CW |
2546 | } |
2547 | ||
2548 | static int ____i915_gem_object_get_pages(struct drm_i915_gem_object *obj) | |
2549 | { | |
b91b09ee | 2550 | int err; |
03ac84f1 CW |
2551 | |
2552 | if (unlikely(obj->mm.madv != I915_MADV_WILLNEED)) { | |
2553 | DRM_DEBUG("Attempting to obtain a purgeable object\n"); | |
2554 | return -EFAULT; | |
2555 | } | |
2556 | ||
b91b09ee MA |
2557 | err = obj->ops->get_pages(obj); |
2558 | GEM_BUG_ON(!err && IS_ERR_OR_NULL(obj->mm.pages)); | |
03ac84f1 | 2559 | |
b91b09ee | 2560 | return err; |
673a394b EA |
2561 | } |
2562 | ||
37e680a1 | 2563 | /* Ensure that the associated pages are gathered from the backing storage |
1233e2db | 2564 | * and pinned into our object. i915_gem_object_pin_pages() may be called |
37e680a1 | 2565 | * multiple times before they are released by a single call to |
1233e2db | 2566 | * i915_gem_object_unpin_pages() - once the pages are no longer referenced |
37e680a1 CW |
2567 | * either as a result of memory pressure (reaping pages under the shrinker) |
2568 | * or as the object is itself released. | |
2569 | */ | |
a4f5ea64 | 2570 | int __i915_gem_object_get_pages(struct drm_i915_gem_object *obj) |
37e680a1 | 2571 | { |
03ac84f1 | 2572 | int err; |
37e680a1 | 2573 | |
1233e2db CW |
2574 | err = mutex_lock_interruptible(&obj->mm.lock); |
2575 | if (err) | |
2576 | return err; | |
4c7d62c6 | 2577 | |
f1fa4f44 | 2578 | if (unlikely(!i915_gem_object_has_pages(obj))) { |
88c880bb CW |
2579 | GEM_BUG_ON(i915_gem_object_has_pinned_pages(obj)); |
2580 | ||
2c3a3f44 CW |
2581 | err = ____i915_gem_object_get_pages(obj); |
2582 | if (err) | |
2583 | goto unlock; | |
37e680a1 | 2584 | |
2c3a3f44 CW |
2585 | smp_mb__before_atomic(); |
2586 | } | |
2587 | atomic_inc(&obj->mm.pages_pin_count); | |
ee286370 | 2588 | |
1233e2db CW |
2589 | unlock: |
2590 | mutex_unlock(&obj->mm.lock); | |
03ac84f1 | 2591 | return err; |
673a394b EA |
2592 | } |
2593 | ||
dd6034c6 | 2594 | /* The 'mapping' part of i915_gem_object_pin_map() below */ |
d31d7cb1 CW |
2595 | static void *i915_gem_object_map(const struct drm_i915_gem_object *obj, |
2596 | enum i915_map_type type) | |
dd6034c6 DG |
2597 | { |
2598 | unsigned long n_pages = obj->base.size >> PAGE_SHIFT; | |
a4f5ea64 | 2599 | struct sg_table *sgt = obj->mm.pages; |
85d1225e DG |
2600 | struct sgt_iter sgt_iter; |
2601 | struct page *page; | |
b338fa47 DG |
2602 | struct page *stack_pages[32]; |
2603 | struct page **pages = stack_pages; | |
dd6034c6 | 2604 | unsigned long i = 0; |
d31d7cb1 | 2605 | pgprot_t pgprot; |
dd6034c6 DG |
2606 | void *addr; |
2607 | ||
2608 | /* A single page can always be kmapped */ | |
d31d7cb1 | 2609 | if (n_pages == 1 && type == I915_MAP_WB) |
dd6034c6 DG |
2610 | return kmap(sg_page(sgt->sgl)); |
2611 | ||
b338fa47 DG |
2612 | if (n_pages > ARRAY_SIZE(stack_pages)) { |
2613 | /* Too big for stack -- allocate temporary array instead */ | |
0ee931c4 | 2614 | pages = kvmalloc_array(n_pages, sizeof(*pages), GFP_KERNEL); |
b338fa47 DG |
2615 | if (!pages) |
2616 | return NULL; | |
2617 | } | |
dd6034c6 | 2618 | |
85d1225e DG |
2619 | for_each_sgt_page(page, sgt_iter, sgt) |
2620 | pages[i++] = page; | |
dd6034c6 DG |
2621 | |
2622 | /* Check that we have the expected number of pages */ | |
2623 | GEM_BUG_ON(i != n_pages); | |
2624 | ||
d31d7cb1 | 2625 | switch (type) { |
a575c676 CW |
2626 | default: |
2627 | MISSING_CASE(type); | |
2628 | /* fallthrough to use PAGE_KERNEL anyway */ | |
d31d7cb1 CW |
2629 | case I915_MAP_WB: |
2630 | pgprot = PAGE_KERNEL; | |
2631 | break; | |
2632 | case I915_MAP_WC: | |
2633 | pgprot = pgprot_writecombine(PAGE_KERNEL_IO); | |
2634 | break; | |
2635 | } | |
2636 | addr = vmap(pages, n_pages, 0, pgprot); | |
dd6034c6 | 2637 | |
b338fa47 | 2638 | if (pages != stack_pages) |
2098105e | 2639 | kvfree(pages); |
dd6034c6 DG |
2640 | |
2641 | return addr; | |
2642 | } | |
2643 | ||
2644 | /* get, pin, and map the pages of the object into kernel space */ | |
d31d7cb1 CW |
2645 | void *i915_gem_object_pin_map(struct drm_i915_gem_object *obj, |
2646 | enum i915_map_type type) | |
0a798eb9 | 2647 | { |
d31d7cb1 CW |
2648 | enum i915_map_type has_type; |
2649 | bool pinned; | |
2650 | void *ptr; | |
0a798eb9 CW |
2651 | int ret; |
2652 | ||
d31d7cb1 | 2653 | GEM_BUG_ON(!i915_gem_object_has_struct_page(obj)); |
0a798eb9 | 2654 | |
1233e2db | 2655 | ret = mutex_lock_interruptible(&obj->mm.lock); |
0a798eb9 CW |
2656 | if (ret) |
2657 | return ERR_PTR(ret); | |
2658 | ||
a575c676 CW |
2659 | pinned = !(type & I915_MAP_OVERRIDE); |
2660 | type &= ~I915_MAP_OVERRIDE; | |
2661 | ||
1233e2db | 2662 | if (!atomic_inc_not_zero(&obj->mm.pages_pin_count)) { |
f1fa4f44 | 2663 | if (unlikely(!i915_gem_object_has_pages(obj))) { |
88c880bb CW |
2664 | GEM_BUG_ON(i915_gem_object_has_pinned_pages(obj)); |
2665 | ||
2c3a3f44 CW |
2666 | ret = ____i915_gem_object_get_pages(obj); |
2667 | if (ret) | |
2668 | goto err_unlock; | |
1233e2db | 2669 | |
2c3a3f44 CW |
2670 | smp_mb__before_atomic(); |
2671 | } | |
2672 | atomic_inc(&obj->mm.pages_pin_count); | |
1233e2db CW |
2673 | pinned = false; |
2674 | } | |
f1fa4f44 | 2675 | GEM_BUG_ON(!i915_gem_object_has_pages(obj)); |
0a798eb9 | 2676 | |
0ce81788 | 2677 | ptr = page_unpack_bits(obj->mm.mapping, &has_type); |
d31d7cb1 CW |
2678 | if (ptr && has_type != type) { |
2679 | if (pinned) { | |
2680 | ret = -EBUSY; | |
1233e2db | 2681 | goto err_unpin; |
0a798eb9 | 2682 | } |
d31d7cb1 CW |
2683 | |
2684 | if (is_vmalloc_addr(ptr)) | |
2685 | vunmap(ptr); | |
2686 | else | |
2687 | kunmap(kmap_to_page(ptr)); | |
2688 | ||
a4f5ea64 | 2689 | ptr = obj->mm.mapping = NULL; |
0a798eb9 CW |
2690 | } |
2691 | ||
d31d7cb1 CW |
2692 | if (!ptr) { |
2693 | ptr = i915_gem_object_map(obj, type); | |
2694 | if (!ptr) { | |
2695 | ret = -ENOMEM; | |
1233e2db | 2696 | goto err_unpin; |
d31d7cb1 CW |
2697 | } |
2698 | ||
0ce81788 | 2699 | obj->mm.mapping = page_pack_bits(ptr, type); |
d31d7cb1 CW |
2700 | } |
2701 | ||
1233e2db CW |
2702 | out_unlock: |
2703 | mutex_unlock(&obj->mm.lock); | |
d31d7cb1 CW |
2704 | return ptr; |
2705 | ||
1233e2db CW |
2706 | err_unpin: |
2707 | atomic_dec(&obj->mm.pages_pin_count); | |
2708 | err_unlock: | |
2709 | ptr = ERR_PTR(ret); | |
2710 | goto out_unlock; | |
0a798eb9 CW |
2711 | } |
2712 | ||
7c55e2c5 CW |
2713 | static int |
2714 | i915_gem_object_pwrite_gtt(struct drm_i915_gem_object *obj, | |
2715 | const struct drm_i915_gem_pwrite *arg) | |
2716 | { | |
2717 | struct address_space *mapping = obj->base.filp->f_mapping; | |
2718 | char __user *user_data = u64_to_user_ptr(arg->data_ptr); | |
2719 | u64 remain, offset; | |
2720 | unsigned int pg; | |
2721 | ||
2722 | /* Before we instantiate/pin the backing store for our use, we | |
2723 | * can prepopulate the shmemfs filp efficiently using a write into | |
2724 | * the pagecache. We avoid the penalty of instantiating all the | |
2725 | * pages, important if the user is just writing to a few and never | |
2726 | * uses the object on the GPU, and using a direct write into shmemfs | |
2727 | * allows it to avoid the cost of retrieving a page (either swapin | |
2728 | * or clearing-before-use) before it is overwritten. | |
2729 | */ | |
f1fa4f44 | 2730 | if (i915_gem_object_has_pages(obj)) |
7c55e2c5 CW |
2731 | return -ENODEV; |
2732 | ||
2733 | /* Before the pages are instantiated the object is treated as being | |
2734 | * in the CPU domain. The pages will be clflushed as required before | |
2735 | * use, and we can freely write into the pages directly. If userspace | |
2736 | * races pwrite with any other operation; corruption will ensue - | |
2737 | * that is userspace's prerogative! | |
2738 | */ | |
2739 | ||
2740 | remain = arg->size; | |
2741 | offset = arg->offset; | |
2742 | pg = offset_in_page(offset); | |
2743 | ||
2744 | do { | |
2745 | unsigned int len, unwritten; | |
2746 | struct page *page; | |
2747 | void *data, *vaddr; | |
2748 | int err; | |
2749 | ||
2750 | len = PAGE_SIZE - pg; | |
2751 | if (len > remain) | |
2752 | len = remain; | |
2753 | ||
2754 | err = pagecache_write_begin(obj->base.filp, mapping, | |
2755 | offset, len, 0, | |
2756 | &page, &data); | |
2757 | if (err < 0) | |
2758 | return err; | |
2759 | ||
2760 | vaddr = kmap(page); | |
2761 | unwritten = copy_from_user(vaddr + pg, user_data, len); | |
2762 | kunmap(page); | |
2763 | ||
2764 | err = pagecache_write_end(obj->base.filp, mapping, | |
2765 | offset, len, len - unwritten, | |
2766 | page, data); | |
2767 | if (err < 0) | |
2768 | return err; | |
2769 | ||
2770 | if (unwritten) | |
2771 | return -EFAULT; | |
2772 | ||
2773 | remain -= len; | |
2774 | user_data += len; | |
2775 | offset += len; | |
2776 | pg = 0; | |
2777 | } while (remain); | |
2778 | ||
2779 | return 0; | |
2780 | } | |
2781 | ||
77b25a97 CW |
2782 | static bool ban_context(const struct i915_gem_context *ctx, |
2783 | unsigned int score) | |
be62acb4 | 2784 | { |
6095868a | 2785 | return (i915_gem_context_is_bannable(ctx) && |
77b25a97 | 2786 | score >= CONTEXT_SCORE_BAN_THRESHOLD); |
be62acb4 MK |
2787 | } |
2788 | ||
e5e1fc47 | 2789 | static void i915_gem_context_mark_guilty(struct i915_gem_context *ctx) |
aa60c664 | 2790 | { |
77b25a97 CW |
2791 | unsigned int score; |
2792 | bool banned; | |
b083a087 | 2793 | |
77b25a97 | 2794 | atomic_inc(&ctx->guilty_count); |
b083a087 | 2795 | |
77b25a97 CW |
2796 | score = atomic_add_return(CONTEXT_SCORE_GUILTY, &ctx->ban_score); |
2797 | banned = ban_context(ctx, score); | |
2798 | DRM_DEBUG_DRIVER("context %s marked guilty (score %d) banned? %s\n", | |
2799 | ctx->name, score, yesno(banned)); | |
2800 | if (!banned) | |
b083a087 MK |
2801 | return; |
2802 | ||
77b25a97 CW |
2803 | i915_gem_context_set_banned(ctx); |
2804 | if (!IS_ERR_OR_NULL(ctx->file_priv)) { | |
2805 | atomic_inc(&ctx->file_priv->context_bans); | |
2806 | DRM_DEBUG_DRIVER("client %s has had %d context banned\n", | |
2807 | ctx->name, atomic_read(&ctx->file_priv->context_bans)); | |
2808 | } | |
e5e1fc47 MK |
2809 | } |
2810 | ||
2811 | static void i915_gem_context_mark_innocent(struct i915_gem_context *ctx) | |
2812 | { | |
77b25a97 | 2813 | atomic_inc(&ctx->active_count); |
aa60c664 MK |
2814 | } |
2815 | ||
8d9fc7fd | 2816 | struct drm_i915_gem_request * |
0bc40be8 | 2817 | i915_gem_find_active_request(struct intel_engine_cs *engine) |
9375e446 | 2818 | { |
754c9fd5 CW |
2819 | struct drm_i915_gem_request *request, *active = NULL; |
2820 | unsigned long flags; | |
4db080f9 | 2821 | |
f69a02c9 CW |
2822 | /* We are called by the error capture and reset at a random |
2823 | * point in time. In particular, note that neither is crucially | |
2824 | * ordered with an interrupt. After a hang, the GPU is dead and we | |
2825 | * assume that no more writes can happen (we waited long enough for | |
2826 | * all writes that were in transaction to be flushed) - adding an | |
2827 | * extra delay for a recent interrupt is pointless. Hence, we do | |
2828 | * not need an engine->irq_seqno_barrier() before the seqno reads. | |
2829 | */ | |
754c9fd5 | 2830 | spin_lock_irqsave(&engine->timeline->lock, flags); |
73cb9701 | 2831 | list_for_each_entry(request, &engine->timeline->requests, link) { |
754c9fd5 CW |
2832 | if (__i915_gem_request_completed(request, |
2833 | request->global_seqno)) | |
4db080f9 | 2834 | continue; |
aa60c664 | 2835 | |
36193acd | 2836 | GEM_BUG_ON(request->engine != engine); |
c00122f3 CW |
2837 | GEM_BUG_ON(test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, |
2838 | &request->fence.flags)); | |
754c9fd5 CW |
2839 | |
2840 | active = request; | |
2841 | break; | |
4db080f9 | 2842 | } |
754c9fd5 | 2843 | spin_unlock_irqrestore(&engine->timeline->lock, flags); |
b6b0fac0 | 2844 | |
754c9fd5 | 2845 | return active; |
b6b0fac0 MK |
2846 | } |
2847 | ||
bf2f0436 MK |
2848 | static bool engine_stalled(struct intel_engine_cs *engine) |
2849 | { | |
2850 | if (!engine->hangcheck.stalled) | |
2851 | return false; | |
2852 | ||
2853 | /* Check for possible seqno movement after hang declaration */ | |
2854 | if (engine->hangcheck.seqno != intel_engine_get_seqno(engine)) { | |
2855 | DRM_DEBUG_DRIVER("%s pardoned\n", engine->name); | |
2856 | return false; | |
2857 | } | |
2858 | ||
2859 | return true; | |
2860 | } | |
2861 | ||
a1ef70e1 MT |
2862 | /* |
2863 | * Ensure irq handler finishes, and not run again. | |
2864 | * Also return the active request so that we only search for it once. | |
2865 | */ | |
2866 | struct drm_i915_gem_request * | |
2867 | i915_gem_reset_prepare_engine(struct intel_engine_cs *engine) | |
2868 | { | |
2869 | struct drm_i915_gem_request *request = NULL; | |
2870 | ||
1749d90f CW |
2871 | /* |
2872 | * During the reset sequence, we must prevent the engine from | |
2873 | * entering RC6. As the context state is undefined until we restart | |
2874 | * the engine, if it does enter RC6 during the reset, the state | |
2875 | * written to the powercontext is undefined and so we may lose | |
2876 | * GPU state upon resume, i.e. fail to restart after a reset. | |
2877 | */ | |
2878 | intel_uncore_forcewake_get(engine->i915, FORCEWAKE_ALL); | |
2879 | ||
2880 | /* | |
2881 | * Prevent the signaler thread from updating the request | |
a1ef70e1 MT |
2882 | * state (by calling dma_fence_signal) as we are processing |
2883 | * the reset. The write from the GPU of the seqno is | |
2884 | * asynchronous and the signaler thread may see a different | |
2885 | * value to us and declare the request complete, even though | |
2886 | * the reset routine have picked that request as the active | |
2887 | * (incomplete) request. This conflict is not handled | |
2888 | * gracefully! | |
2889 | */ | |
2890 | kthread_park(engine->breadcrumbs.signaler); | |
2891 | ||
1749d90f CW |
2892 | /* |
2893 | * Prevent request submission to the hardware until we have | |
a1ef70e1 MT |
2894 | * completed the reset in i915_gem_reset_finish(). If a request |
2895 | * is completed by one engine, it may then queue a request | |
2896 | * to a second via its engine->irq_tasklet *just* as we are | |
2897 | * calling engine->init_hw() and also writing the ELSP. | |
2898 | * Turning off the engine->irq_tasklet until the reset is over | |
2899 | * prevents the race. | |
2900 | */ | |
b620e870 MK |
2901 | tasklet_kill(&engine->execlists.irq_tasklet); |
2902 | tasklet_disable(&engine->execlists.irq_tasklet); | |
a1ef70e1 MT |
2903 | |
2904 | if (engine->irq_seqno_barrier) | |
2905 | engine->irq_seqno_barrier(engine); | |
2906 | ||
d1d1ebf4 CW |
2907 | request = i915_gem_find_active_request(engine); |
2908 | if (request && request->fence.error == -EIO) | |
2909 | request = ERR_PTR(-EIO); /* Previous reset failed! */ | |
a1ef70e1 MT |
2910 | |
2911 | return request; | |
2912 | } | |
2913 | ||
0e178aef | 2914 | int i915_gem_reset_prepare(struct drm_i915_private *dev_priv) |
4c965543 CW |
2915 | { |
2916 | struct intel_engine_cs *engine; | |
a1ef70e1 | 2917 | struct drm_i915_gem_request *request; |
4c965543 | 2918 | enum intel_engine_id id; |
0e178aef | 2919 | int err = 0; |
4c965543 | 2920 | |
0e178aef | 2921 | for_each_engine(engine, dev_priv, id) { |
a1ef70e1 MT |
2922 | request = i915_gem_reset_prepare_engine(engine); |
2923 | if (IS_ERR(request)) { | |
2924 | err = PTR_ERR(request); | |
2925 | continue; | |
0e178aef | 2926 | } |
c64992e0 MT |
2927 | |
2928 | engine->hangcheck.active_request = request; | |
0e178aef CW |
2929 | } |
2930 | ||
4c965543 | 2931 | i915_gem_revoke_fences(dev_priv); |
0e178aef CW |
2932 | |
2933 | return err; | |
4c965543 CW |
2934 | } |
2935 | ||
36193acd | 2936 | static void skip_request(struct drm_i915_gem_request *request) |
821ed7df CW |
2937 | { |
2938 | void *vaddr = request->ring->vaddr; | |
2939 | u32 head; | |
2940 | ||
2941 | /* As this request likely depends on state from the lost | |
2942 | * context, clear out all the user operations leaving the | |
2943 | * breadcrumb at the end (so we get the fence notifications). | |
2944 | */ | |
2945 | head = request->head; | |
2946 | if (request->postfix < head) { | |
2947 | memset(vaddr + head, 0, request->ring->size - head); | |
2948 | head = 0; | |
2949 | } | |
2950 | memset(vaddr + head, 0, request->postfix - head); | |
c0d5f32c CW |
2951 | |
2952 | dma_fence_set_error(&request->fence, -EIO); | |
821ed7df CW |
2953 | } |
2954 | ||
36193acd MK |
2955 | static void engine_skip_context(struct drm_i915_gem_request *request) |
2956 | { | |
2957 | struct intel_engine_cs *engine = request->engine; | |
2958 | struct i915_gem_context *hung_ctx = request->ctx; | |
2959 | struct intel_timeline *timeline; | |
2960 | unsigned long flags; | |
2961 | ||
2962 | timeline = i915_gem_context_lookup_timeline(hung_ctx, engine); | |
2963 | ||
2964 | spin_lock_irqsave(&engine->timeline->lock, flags); | |
2965 | spin_lock(&timeline->lock); | |
2966 | ||
2967 | list_for_each_entry_continue(request, &engine->timeline->requests, link) | |
2968 | if (request->ctx == hung_ctx) | |
2969 | skip_request(request); | |
2970 | ||
2971 | list_for_each_entry(request, &timeline->requests, link) | |
2972 | skip_request(request); | |
2973 | ||
2974 | spin_unlock(&timeline->lock); | |
2975 | spin_unlock_irqrestore(&engine->timeline->lock, flags); | |
2976 | } | |
2977 | ||
d1d1ebf4 CW |
2978 | /* Returns the request if it was guilty of the hang */ |
2979 | static struct drm_i915_gem_request * | |
2980 | i915_gem_reset_request(struct intel_engine_cs *engine, | |
2981 | struct drm_i915_gem_request *request) | |
61da5362 | 2982 | { |
71895a08 MK |
2983 | /* The guilty request will get skipped on a hung engine. |
2984 | * | |
2985 | * Users of client default contexts do not rely on logical | |
2986 | * state preserved between batches so it is safe to execute | |
2987 | * queued requests following the hang. Non default contexts | |
2988 | * rely on preserved state, so skipping a batch loses the | |
2989 | * evolution of the state and it needs to be considered corrupted. | |
2990 | * Executing more queued batches on top of corrupted state is | |
2991 | * risky. But we take the risk by trying to advance through | |
2992 | * the queued requests in order to make the client behaviour | |
2993 | * more predictable around resets, by not throwing away random | |
2994 | * amount of batches it has prepared for execution. Sophisticated | |
2995 | * clients can use gem_reset_stats_ioctl and dma fence status | |
2996 | * (exported via sync_file info ioctl on explicit fences) to observe | |
2997 | * when it loses the context state and should rebuild accordingly. | |
2998 | * | |
2999 | * The context ban, and ultimately the client ban, mechanism are safety | |
3000 | * valves if client submission ends up resulting in nothing more than | |
3001 | * subsequent hangs. | |
3002 | */ | |
3003 | ||
d1d1ebf4 | 3004 | if (engine_stalled(engine)) { |
61da5362 MK |
3005 | i915_gem_context_mark_guilty(request->ctx); |
3006 | skip_request(request); | |
d1d1ebf4 CW |
3007 | |
3008 | /* If this context is now banned, skip all pending requests. */ | |
3009 | if (i915_gem_context_is_banned(request->ctx)) | |
3010 | engine_skip_context(request); | |
61da5362 | 3011 | } else { |
d1d1ebf4 CW |
3012 | /* |
3013 | * Since this is not the hung engine, it may have advanced | |
3014 | * since the hang declaration. Double check by refinding | |
3015 | * the active request at the time of the reset. | |
3016 | */ | |
3017 | request = i915_gem_find_active_request(engine); | |
3018 | if (request) { | |
3019 | i915_gem_context_mark_innocent(request->ctx); | |
3020 | dma_fence_set_error(&request->fence, -EAGAIN); | |
3021 | ||
3022 | /* Rewind the engine to replay the incomplete rq */ | |
3023 | spin_lock_irq(&engine->timeline->lock); | |
3024 | request = list_prev_entry(request, link); | |
3025 | if (&request->link == &engine->timeline->requests) | |
3026 | request = NULL; | |
3027 | spin_unlock_irq(&engine->timeline->lock); | |
3028 | } | |
61da5362 MK |
3029 | } |
3030 | ||
d1d1ebf4 | 3031 | return request; |
61da5362 MK |
3032 | } |
3033 | ||
a1ef70e1 MT |
3034 | void i915_gem_reset_engine(struct intel_engine_cs *engine, |
3035 | struct drm_i915_gem_request *request) | |
b6b0fac0 | 3036 | { |
ed454f2c CW |
3037 | engine->irq_posted = 0; |
3038 | ||
d1d1ebf4 CW |
3039 | if (request) |
3040 | request = i915_gem_reset_request(engine, request); | |
3041 | ||
3042 | if (request) { | |
c0dcb203 CW |
3043 | DRM_DEBUG_DRIVER("resetting %s to restart from tail of request 0x%x\n", |
3044 | engine->name, request->global_seqno); | |
c0dcb203 | 3045 | } |
821ed7df CW |
3046 | |
3047 | /* Setup the CS to resume from the breadcrumb of the hung request */ | |
3048 | engine->reset_hw(engine, request); | |
4db080f9 | 3049 | } |
aa60c664 | 3050 | |
d8027093 | 3051 | void i915_gem_reset(struct drm_i915_private *dev_priv) |
4db080f9 | 3052 | { |
821ed7df | 3053 | struct intel_engine_cs *engine; |
3b3f1650 | 3054 | enum intel_engine_id id; |
608c1a52 | 3055 | |
4c7d62c6 CW |
3056 | lockdep_assert_held(&dev_priv->drm.struct_mutex); |
3057 | ||
821ed7df CW |
3058 | i915_gem_retire_requests(dev_priv); |
3059 | ||
2ae55738 CW |
3060 | for_each_engine(engine, dev_priv, id) { |
3061 | struct i915_gem_context *ctx; | |
3062 | ||
c64992e0 | 3063 | i915_gem_reset_engine(engine, engine->hangcheck.active_request); |
2ae55738 CW |
3064 | ctx = fetch_and_zero(&engine->last_retired_context); |
3065 | if (ctx) | |
3066 | engine->context_unpin(engine, ctx); | |
3067 | } | |
821ed7df | 3068 | |
4362f4f6 | 3069 | i915_gem_restore_fences(dev_priv); |
f2a91d1a CW |
3070 | |
3071 | if (dev_priv->gt.awake) { | |
3072 | intel_sanitize_gt_powersave(dev_priv); | |
3073 | intel_enable_gt_powersave(dev_priv); | |
3074 | if (INTEL_GEN(dev_priv) >= 6) | |
3075 | gen6_rps_busy(dev_priv); | |
3076 | } | |
821ed7df CW |
3077 | } |
3078 | ||
a1ef70e1 MT |
3079 | void i915_gem_reset_finish_engine(struct intel_engine_cs *engine) |
3080 | { | |
b620e870 | 3081 | tasklet_enable(&engine->execlists.irq_tasklet); |
a1ef70e1 | 3082 | kthread_unpark(engine->breadcrumbs.signaler); |
1749d90f CW |
3083 | |
3084 | intel_uncore_forcewake_put(engine->i915, FORCEWAKE_ALL); | |
a1ef70e1 MT |
3085 | } |
3086 | ||
d8027093 CW |
3087 | void i915_gem_reset_finish(struct drm_i915_private *dev_priv) |
3088 | { | |
1f7b847d CW |
3089 | struct intel_engine_cs *engine; |
3090 | enum intel_engine_id id; | |
3091 | ||
d8027093 | 3092 | lockdep_assert_held(&dev_priv->drm.struct_mutex); |
1f7b847d | 3093 | |
fe3288b5 | 3094 | for_each_engine(engine, dev_priv, id) { |
c64992e0 | 3095 | engine->hangcheck.active_request = NULL; |
a1ef70e1 | 3096 | i915_gem_reset_finish_engine(engine); |
fe3288b5 | 3097 | } |
d8027093 CW |
3098 | } |
3099 | ||
821ed7df | 3100 | static void nop_submit_request(struct drm_i915_gem_request *request) |
af7a8ffa | 3101 | { |
af7a8ffa DV |
3102 | dma_fence_set_error(&request->fence, -EIO); |
3103 | ||
3104 | i915_gem_request_submit(request); | |
3105 | } | |
3106 | ||
3107 | static void nop_complete_submit_request(struct drm_i915_gem_request *request) | |
821ed7df | 3108 | { |
8d550824 CW |
3109 | unsigned long flags; |
3110 | ||
3cd9442f | 3111 | dma_fence_set_error(&request->fence, -EIO); |
8d550824 CW |
3112 | |
3113 | spin_lock_irqsave(&request->engine->timeline->lock, flags); | |
3114 | __i915_gem_request_submit(request); | |
3dcf93f7 | 3115 | intel_engine_init_global_seqno(request->engine, request->global_seqno); |
8d550824 | 3116 | spin_unlock_irqrestore(&request->engine->timeline->lock, flags); |
821ed7df CW |
3117 | } |
3118 | ||
af7a8ffa | 3119 | void i915_gem_set_wedged(struct drm_i915_private *i915) |
821ed7df | 3120 | { |
af7a8ffa DV |
3121 | struct intel_engine_cs *engine; |
3122 | enum intel_engine_id id; | |
3123 | ||
3124 | /* | |
3125 | * First, stop submission to hw, but do not yet complete requests by | |
3126 | * rolling the global seqno forward (since this would complete requests | |
3127 | * for which we haven't set the fence error to EIO yet). | |
3128 | */ | |
3129 | for_each_engine(engine, i915, id) | |
3130 | engine->submit_request = nop_submit_request; | |
3131 | ||
3132 | /* | |
3133 | * Make sure no one is running the old callback before we proceed with | |
3134 | * cancelling requests and resetting the completion tracking. Otherwise | |
3135 | * we might submit a request to the hardware which never completes. | |
20e4933c | 3136 | */ |
af7a8ffa | 3137 | synchronize_rcu(); |
70c2a24d | 3138 | |
af7a8ffa DV |
3139 | for_each_engine(engine, i915, id) { |
3140 | /* Mark all executing requests as skipped */ | |
3141 | engine->cancel_requests(engine); | |
5e32d748 | 3142 | |
af7a8ffa DV |
3143 | /* |
3144 | * Only once we've force-cancelled all in-flight requests can we | |
3145 | * start to complete all requests. | |
3146 | */ | |
3147 | engine->submit_request = nop_complete_submit_request; | |
3148 | } | |
3149 | ||
3150 | /* | |
3151 | * Make sure no request can slip through without getting completed by | |
3152 | * either this call here to intel_engine_init_global_seqno, or the one | |
3153 | * in nop_complete_submit_request. | |
5e32d748 | 3154 | */ |
af7a8ffa | 3155 | synchronize_rcu(); |
673a394b | 3156 | |
af7a8ffa DV |
3157 | for_each_engine(engine, i915, id) { |
3158 | unsigned long flags; | |
673a394b | 3159 | |
af7a8ffa DV |
3160 | /* Mark all pending requests as complete so that any concurrent |
3161 | * (lockless) lookup doesn't try and wait upon the request as we | |
3162 | * reset it. | |
3163 | */ | |
3164 | spin_lock_irqsave(&engine->timeline->lock, flags); | |
3165 | intel_engine_init_global_seqno(engine, | |
3166 | intel_engine_last_submit(engine)); | |
3167 | spin_unlock_irqrestore(&engine->timeline->lock, flags); | |
3168 | } | |
20e4933c | 3169 | |
3d7adbbf CW |
3170 | set_bit(I915_WEDGED, &i915->gpu_error.flags); |
3171 | wake_up_all(&i915->gpu_error.reset_queue); | |
673a394b EA |
3172 | } |
3173 | ||
2e8f9d32 CW |
3174 | bool i915_gem_unset_wedged(struct drm_i915_private *i915) |
3175 | { | |
3176 | struct i915_gem_timeline *tl; | |
3177 | int i; | |
3178 | ||
3179 | lockdep_assert_held(&i915->drm.struct_mutex); | |
3180 | if (!test_bit(I915_WEDGED, &i915->gpu_error.flags)) | |
3181 | return true; | |
3182 | ||
3183 | /* Before unwedging, make sure that all pending operations | |
3184 | * are flushed and errored out - we may have requests waiting upon | |
3185 | * third party fences. We marked all inflight requests as EIO, and | |
3186 | * every execbuf since returned EIO, for consistency we want all | |
3187 | * the currently pending requests to also be marked as EIO, which | |
3188 | * is done inside our nop_submit_request - and so we must wait. | |
3189 | * | |
3190 | * No more can be submitted until we reset the wedged bit. | |
3191 | */ | |
3192 | list_for_each_entry(tl, &i915->gt.timelines, link) { | |
3193 | for (i = 0; i < ARRAY_SIZE(tl->engine); i++) { | |
3194 | struct drm_i915_gem_request *rq; | |
3195 | ||
3196 | rq = i915_gem_active_peek(&tl->engine[i].last_request, | |
3197 | &i915->drm.struct_mutex); | |
3198 | if (!rq) | |
3199 | continue; | |
3200 | ||
3201 | /* We can't use our normal waiter as we want to | |
3202 | * avoid recursively trying to handle the current | |
3203 | * reset. The basic dma_fence_default_wait() installs | |
3204 | * a callback for dma_fence_signal(), which is | |
3205 | * triggered by our nop handler (indirectly, the | |
3206 | * callback enables the signaler thread which is | |
3207 | * woken by the nop_submit_request() advancing the seqno | |
3208 | * and when the seqno passes the fence, the signaler | |
3209 | * then signals the fence waking us up). | |
3210 | */ | |
3211 | if (dma_fence_default_wait(&rq->fence, true, | |
3212 | MAX_SCHEDULE_TIMEOUT) < 0) | |
3213 | return false; | |
3214 | } | |
3215 | } | |
3216 | ||
3217 | /* Undo nop_submit_request. We prevent all new i915 requests from | |
3218 | * being queued (by disallowing execbuf whilst wedged) so having | |
3219 | * waited for all active requests above, we know the system is idle | |
3220 | * and do not have to worry about a thread being inside | |
3221 | * engine->submit_request() as we swap over. So unlike installing | |
3222 | * the nop_submit_request on reset, we can do this from normal | |
3223 | * context and do not require stop_machine(). | |
3224 | */ | |
3225 | intel_engines_reset_default_submission(i915); | |
36703e79 | 3226 | i915_gem_contexts_lost(i915); |
2e8f9d32 CW |
3227 | |
3228 | smp_mb__before_atomic(); /* complete takeover before enabling execbuf */ | |
3229 | clear_bit(I915_WEDGED, &i915->gpu_error.flags); | |
3230 | ||
3231 | return true; | |
3232 | } | |
3233 | ||
75ef9da2 | 3234 | static void |
673a394b EA |
3235 | i915_gem_retire_work_handler(struct work_struct *work) |
3236 | { | |
b29c19b6 | 3237 | struct drm_i915_private *dev_priv = |
67d97da3 | 3238 | container_of(work, typeof(*dev_priv), gt.retire_work.work); |
91c8a326 | 3239 | struct drm_device *dev = &dev_priv->drm; |
673a394b | 3240 | |
891b48cf | 3241 | /* Come back later if the device is busy... */ |
b29c19b6 | 3242 | if (mutex_trylock(&dev->struct_mutex)) { |
67d97da3 | 3243 | i915_gem_retire_requests(dev_priv); |
b29c19b6 | 3244 | mutex_unlock(&dev->struct_mutex); |
673a394b | 3245 | } |
67d97da3 CW |
3246 | |
3247 | /* Keep the retire handler running until we are finally idle. | |
3248 | * We do not need to do this test under locking as in the worst-case | |
3249 | * we queue the retire worker once too often. | |
3250 | */ | |
c9615613 CW |
3251 | if (READ_ONCE(dev_priv->gt.awake)) { |
3252 | i915_queue_hangcheck(dev_priv); | |
67d97da3 CW |
3253 | queue_delayed_work(dev_priv->wq, |
3254 | &dev_priv->gt.retire_work, | |
bcb45086 | 3255 | round_jiffies_up_relative(HZ)); |
c9615613 | 3256 | } |
b29c19b6 | 3257 | } |
0a58705b | 3258 | |
b29c19b6 CW |
3259 | static void |
3260 | i915_gem_idle_work_handler(struct work_struct *work) | |
3261 | { | |
3262 | struct drm_i915_private *dev_priv = | |
67d97da3 | 3263 | container_of(work, typeof(*dev_priv), gt.idle_work.work); |
91c8a326 | 3264 | struct drm_device *dev = &dev_priv->drm; |
67d97da3 CW |
3265 | bool rearm_hangcheck; |
3266 | ||
3267 | if (!READ_ONCE(dev_priv->gt.awake)) | |
3268 | return; | |
3269 | ||
0cb5670b ID |
3270 | /* |
3271 | * Wait for last execlists context complete, but bail out in case a | |
3272 | * new request is submitted. | |
3273 | */ | |
8490ae20 | 3274 | wait_for(intel_engines_are_idle(dev_priv), 10); |
28176ef4 | 3275 | if (READ_ONCE(dev_priv->gt.active_requests)) |
67d97da3 CW |
3276 | return; |
3277 | ||
3278 | rearm_hangcheck = | |
3279 | cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work); | |
3280 | ||
3281 | if (!mutex_trylock(&dev->struct_mutex)) { | |
3282 | /* Currently busy, come back later */ | |
3283 | mod_delayed_work(dev_priv->wq, | |
3284 | &dev_priv->gt.idle_work, | |
3285 | msecs_to_jiffies(50)); | |
3286 | goto out_rearm; | |
3287 | } | |
3288 | ||
93c97dc1 ID |
3289 | /* |
3290 | * New request retired after this work handler started, extend active | |
3291 | * period until next instance of the work. | |
3292 | */ | |
3293 | if (work_pending(work)) | |
3294 | goto out_unlock; | |
3295 | ||
28176ef4 | 3296 | if (dev_priv->gt.active_requests) |
67d97da3 | 3297 | goto out_unlock; |
b29c19b6 | 3298 | |
05425249 | 3299 | if (wait_for(intel_engines_are_idle(dev_priv), 10)) |
0cb5670b ID |
3300 | DRM_ERROR("Timeout waiting for engines to idle\n"); |
3301 | ||
6c067579 | 3302 | intel_engines_mark_idle(dev_priv); |
47979480 | 3303 | i915_gem_timelines_mark_idle(dev_priv); |
35c94185 | 3304 | |
67d97da3 CW |
3305 | GEM_BUG_ON(!dev_priv->gt.awake); |
3306 | dev_priv->gt.awake = false; | |
3307 | rearm_hangcheck = false; | |
30ecad77 | 3308 | |
67d97da3 CW |
3309 | if (INTEL_GEN(dev_priv) >= 6) |
3310 | gen6_rps_idle(dev_priv); | |
3311 | intel_runtime_pm_put(dev_priv); | |
3312 | out_unlock: | |
3313 | mutex_unlock(&dev->struct_mutex); | |
b29c19b6 | 3314 | |
67d97da3 CW |
3315 | out_rearm: |
3316 | if (rearm_hangcheck) { | |
3317 | GEM_BUG_ON(!dev_priv->gt.awake); | |
3318 | i915_queue_hangcheck(dev_priv); | |
35c94185 | 3319 | } |
673a394b EA |
3320 | } |
3321 | ||
b1f788c6 CW |
3322 | void i915_gem_close_object(struct drm_gem_object *gem, struct drm_file *file) |
3323 | { | |
d1b48c1e | 3324 | struct drm_i915_private *i915 = to_i915(gem->dev); |
b1f788c6 CW |
3325 | struct drm_i915_gem_object *obj = to_intel_bo(gem); |
3326 | struct drm_i915_file_private *fpriv = file->driver_priv; | |
d1b48c1e | 3327 | struct i915_lut_handle *lut, *ln; |
b1f788c6 | 3328 | |
d1b48c1e CW |
3329 | mutex_lock(&i915->drm.struct_mutex); |
3330 | ||
3331 | list_for_each_entry_safe(lut, ln, &obj->lut_list, obj_link) { | |
3332 | struct i915_gem_context *ctx = lut->ctx; | |
3333 | struct i915_vma *vma; | |
3334 | ||
432295d7 | 3335 | GEM_BUG_ON(ctx->file_priv == ERR_PTR(-EBADF)); |
d1b48c1e CW |
3336 | if (ctx->file_priv != fpriv) |
3337 | continue; | |
3338 | ||
3339 | vma = radix_tree_delete(&ctx->handles_vma, lut->handle); | |
3ffff017 CW |
3340 | GEM_BUG_ON(vma->obj != obj); |
3341 | ||
3342 | /* We allow the process to have multiple handles to the same | |
3343 | * vma, in the same fd namespace, by virtue of flink/open. | |
3344 | */ | |
3345 | GEM_BUG_ON(!vma->open_count); | |
3346 | if (!--vma->open_count && !i915_vma_is_ggtt(vma)) | |
b1f788c6 | 3347 | i915_vma_close(vma); |
f8a7fde4 | 3348 | |
d1b48c1e CW |
3349 | list_del(&lut->obj_link); |
3350 | list_del(&lut->ctx_link); | |
4ff4b44c | 3351 | |
d1b48c1e CW |
3352 | kmem_cache_free(i915->luts, lut); |
3353 | __i915_gem_object_release_unless_active(obj); | |
f8a7fde4 | 3354 | } |
d1b48c1e CW |
3355 | |
3356 | mutex_unlock(&i915->drm.struct_mutex); | |
b1f788c6 CW |
3357 | } |
3358 | ||
e95433c7 CW |
3359 | static unsigned long to_wait_timeout(s64 timeout_ns) |
3360 | { | |
3361 | if (timeout_ns < 0) | |
3362 | return MAX_SCHEDULE_TIMEOUT; | |
3363 | ||
3364 | if (timeout_ns == 0) | |
3365 | return 0; | |
3366 | ||
3367 | return nsecs_to_jiffies_timeout(timeout_ns); | |
3368 | } | |
3369 | ||
23ba4fd0 BW |
3370 | /** |
3371 | * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT | |
14bb2c11 TU |
3372 | * @dev: drm device pointer |
3373 | * @data: ioctl data blob | |
3374 | * @file: drm file pointer | |
23ba4fd0 BW |
3375 | * |
3376 | * Returns 0 if successful, else an error is returned with the remaining time in | |
3377 | * the timeout parameter. | |
3378 | * -ETIME: object is still busy after timeout | |
3379 | * -ERESTARTSYS: signal interrupted the wait | |
3380 | * -ENONENT: object doesn't exist | |
3381 | * Also possible, but rare: | |
b8050148 | 3382 | * -EAGAIN: incomplete, restart syscall |
23ba4fd0 BW |
3383 | * -ENOMEM: damn |
3384 | * -ENODEV: Internal IRQ fail | |
3385 | * -E?: The add request failed | |
3386 | * | |
3387 | * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any | |
3388 | * non-zero timeout parameter the wait ioctl will wait for the given number of | |
3389 | * nanoseconds on an object becoming unbusy. Since the wait itself does so | |
3390 | * without holding struct_mutex the object may become re-busied before this | |
3391 | * function completes. A similar but shorter * race condition exists in the busy | |
3392 | * ioctl | |
3393 | */ | |
3394 | int | |
3395 | i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) | |
3396 | { | |
3397 | struct drm_i915_gem_wait *args = data; | |
3398 | struct drm_i915_gem_object *obj; | |
e95433c7 CW |
3399 | ktime_t start; |
3400 | long ret; | |
23ba4fd0 | 3401 | |
11b5d511 DV |
3402 | if (args->flags != 0) |
3403 | return -EINVAL; | |
3404 | ||
03ac0642 | 3405 | obj = i915_gem_object_lookup(file, args->bo_handle); |
033d549b | 3406 | if (!obj) |
23ba4fd0 | 3407 | return -ENOENT; |
23ba4fd0 | 3408 | |
e95433c7 CW |
3409 | start = ktime_get(); |
3410 | ||
3411 | ret = i915_gem_object_wait(obj, | |
3412 | I915_WAIT_INTERRUPTIBLE | I915_WAIT_ALL, | |
3413 | to_wait_timeout(args->timeout_ns), | |
3414 | to_rps_client(file)); | |
3415 | ||
3416 | if (args->timeout_ns > 0) { | |
3417 | args->timeout_ns -= ktime_to_ns(ktime_sub(ktime_get(), start)); | |
3418 | if (args->timeout_ns < 0) | |
3419 | args->timeout_ns = 0; | |
c1d2061b CW |
3420 | |
3421 | /* | |
3422 | * Apparently ktime isn't accurate enough and occasionally has a | |
3423 | * bit of mismatch in the jiffies<->nsecs<->ktime loop. So patch | |
3424 | * things up to make the test happy. We allow up to 1 jiffy. | |
3425 | * | |
3426 | * This is a regression from the timespec->ktime conversion. | |
3427 | */ | |
3428 | if (ret == -ETIME && !nsecs_to_jiffies(args->timeout_ns)) | |
3429 | args->timeout_ns = 0; | |
b8050148 CW |
3430 | |
3431 | /* Asked to wait beyond the jiffie/scheduler precision? */ | |
3432 | if (ret == -ETIME && args->timeout_ns) | |
3433 | ret = -EAGAIN; | |
b4716185 CW |
3434 | } |
3435 | ||
f0cd5182 | 3436 | i915_gem_object_put(obj); |
ff865885 | 3437 | return ret; |
23ba4fd0 BW |
3438 | } |
3439 | ||
73cb9701 | 3440 | static int wait_for_timeline(struct i915_gem_timeline *tl, unsigned int flags) |
4df2faf4 | 3441 | { |
73cb9701 | 3442 | int ret, i; |
4df2faf4 | 3443 | |
73cb9701 CW |
3444 | for (i = 0; i < ARRAY_SIZE(tl->engine); i++) { |
3445 | ret = i915_gem_active_wait(&tl->engine[i].last_request, flags); | |
3446 | if (ret) | |
3447 | return ret; | |
3448 | } | |
62e63007 | 3449 | |
73cb9701 CW |
3450 | return 0; |
3451 | } | |
3452 | ||
25112b64 CW |
3453 | static int wait_for_engines(struct drm_i915_private *i915) |
3454 | { | |
cad9946c CW |
3455 | if (wait_for(intel_engines_are_idle(i915), 50)) { |
3456 | DRM_ERROR("Failed to idle engines, declaring wedged!\n"); | |
3457 | i915_gem_set_wedged(i915); | |
3458 | return -EIO; | |
25112b64 CW |
3459 | } |
3460 | ||
3461 | return 0; | |
3462 | } | |
3463 | ||
73cb9701 CW |
3464 | int i915_gem_wait_for_idle(struct drm_i915_private *i915, unsigned int flags) |
3465 | { | |
73cb9701 CW |
3466 | int ret; |
3467 | ||
863e9fde CW |
3468 | /* If the device is asleep, we have no requests outstanding */ |
3469 | if (!READ_ONCE(i915->gt.awake)) | |
3470 | return 0; | |
3471 | ||
9caa34aa CW |
3472 | if (flags & I915_WAIT_LOCKED) { |
3473 | struct i915_gem_timeline *tl; | |
3474 | ||
3475 | lockdep_assert_held(&i915->drm.struct_mutex); | |
3476 | ||
3477 | list_for_each_entry(tl, &i915->gt.timelines, link) { | |
3478 | ret = wait_for_timeline(tl, flags); | |
3479 | if (ret) | |
3480 | return ret; | |
3481 | } | |
72022a70 CW |
3482 | |
3483 | i915_gem_retire_requests(i915); | |
3484 | GEM_BUG_ON(i915->gt.active_requests); | |
25112b64 CW |
3485 | |
3486 | ret = wait_for_engines(i915); | |
9caa34aa CW |
3487 | } else { |
3488 | ret = wait_for_timeline(&i915->gt.global_timeline, flags); | |
1ec14ad3 | 3489 | } |
4df2faf4 | 3490 | |
25112b64 | 3491 | return ret; |
4df2faf4 DV |
3492 | } |
3493 | ||
5a97bcc6 CW |
3494 | static void __i915_gem_object_flush_for_display(struct drm_i915_gem_object *obj) |
3495 | { | |
e27ab73d CW |
3496 | /* |
3497 | * We manually flush the CPU domain so that we can override and | |
3498 | * force the flush for the display, and perform it asyncrhonously. | |
3499 | */ | |
3500 | flush_write_domain(obj, ~I915_GEM_DOMAIN_CPU); | |
3501 | if (obj->cache_dirty) | |
3502 | i915_gem_clflush_object(obj, I915_CLFLUSH_FORCE); | |
5a97bcc6 CW |
3503 | obj->base.write_domain = 0; |
3504 | } | |
3505 | ||
3506 | void i915_gem_object_flush_if_display(struct drm_i915_gem_object *obj) | |
3507 | { | |
bd3d2252 | 3508 | if (!READ_ONCE(obj->pin_global)) |
5a97bcc6 CW |
3509 | return; |
3510 | ||
3511 | mutex_lock(&obj->base.dev->struct_mutex); | |
3512 | __i915_gem_object_flush_for_display(obj); | |
3513 | mutex_unlock(&obj->base.dev->struct_mutex); | |
3514 | } | |
3515 | ||
e22d8e3c CW |
3516 | /** |
3517 | * Moves a single object to the WC read, and possibly write domain. | |
3518 | * @obj: object to act on | |
3519 | * @write: ask for write access or read only | |
3520 | * | |
3521 | * This function returns when the move is complete, including waiting on | |
3522 | * flushes to occur. | |
3523 | */ | |
3524 | int | |
3525 | i915_gem_object_set_to_wc_domain(struct drm_i915_gem_object *obj, bool write) | |
3526 | { | |
3527 | int ret; | |
3528 | ||
3529 | lockdep_assert_held(&obj->base.dev->struct_mutex); | |
3530 | ||
3531 | ret = i915_gem_object_wait(obj, | |
3532 | I915_WAIT_INTERRUPTIBLE | | |
3533 | I915_WAIT_LOCKED | | |
3534 | (write ? I915_WAIT_ALL : 0), | |
3535 | MAX_SCHEDULE_TIMEOUT, | |
3536 | NULL); | |
3537 | if (ret) | |
3538 | return ret; | |
3539 | ||
3540 | if (obj->base.write_domain == I915_GEM_DOMAIN_WC) | |
3541 | return 0; | |
3542 | ||
3543 | /* Flush and acquire obj->pages so that we are coherent through | |
3544 | * direct access in memory with previous cached writes through | |
3545 | * shmemfs and that our cache domain tracking remains valid. | |
3546 | * For example, if the obj->filp was moved to swap without us | |
3547 | * being notified and releasing the pages, we would mistakenly | |
3548 | * continue to assume that the obj remained out of the CPU cached | |
3549 | * domain. | |
3550 | */ | |
3551 | ret = i915_gem_object_pin_pages(obj); | |
3552 | if (ret) | |
3553 | return ret; | |
3554 | ||
3555 | flush_write_domain(obj, ~I915_GEM_DOMAIN_WC); | |
3556 | ||
3557 | /* Serialise direct access to this object with the barriers for | |
3558 | * coherent writes from the GPU, by effectively invalidating the | |
3559 | * WC domain upon first access. | |
3560 | */ | |
3561 | if ((obj->base.read_domains & I915_GEM_DOMAIN_WC) == 0) | |
3562 | mb(); | |
3563 | ||
3564 | /* It should now be out of any other write domains, and we can update | |
3565 | * the domain values for our changes. | |
3566 | */ | |
3567 | GEM_BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_WC) != 0); | |
3568 | obj->base.read_domains |= I915_GEM_DOMAIN_WC; | |
3569 | if (write) { | |
3570 | obj->base.read_domains = I915_GEM_DOMAIN_WC; | |
3571 | obj->base.write_domain = I915_GEM_DOMAIN_WC; | |
3572 | obj->mm.dirty = true; | |
3573 | } | |
3574 | ||
3575 | i915_gem_object_unpin_pages(obj); | |
3576 | return 0; | |
3577 | } | |
3578 | ||
2ef7eeaa EA |
3579 | /** |
3580 | * Moves a single object to the GTT read, and possibly write domain. | |
14bb2c11 TU |
3581 | * @obj: object to act on |
3582 | * @write: ask for write access or read only | |
2ef7eeaa EA |
3583 | * |
3584 | * This function returns when the move is complete, including waiting on | |
3585 | * flushes to occur. | |
3586 | */ | |
79e53945 | 3587 | int |
2021746e | 3588 | i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write) |
2ef7eeaa | 3589 | { |
e47c68e9 | 3590 | int ret; |
2ef7eeaa | 3591 | |
e95433c7 | 3592 | lockdep_assert_held(&obj->base.dev->struct_mutex); |
4c7d62c6 | 3593 | |
e95433c7 CW |
3594 | ret = i915_gem_object_wait(obj, |
3595 | I915_WAIT_INTERRUPTIBLE | | |
3596 | I915_WAIT_LOCKED | | |
3597 | (write ? I915_WAIT_ALL : 0), | |
3598 | MAX_SCHEDULE_TIMEOUT, | |
3599 | NULL); | |
88241785 CW |
3600 | if (ret) |
3601 | return ret; | |
3602 | ||
c13d87ea CW |
3603 | if (obj->base.write_domain == I915_GEM_DOMAIN_GTT) |
3604 | return 0; | |
3605 | ||
43566ded CW |
3606 | /* Flush and acquire obj->pages so that we are coherent through |
3607 | * direct access in memory with previous cached writes through | |
3608 | * shmemfs and that our cache domain tracking remains valid. | |
3609 | * For example, if the obj->filp was moved to swap without us | |
3610 | * being notified and releasing the pages, we would mistakenly | |
3611 | * continue to assume that the obj remained out of the CPU cached | |
3612 | * domain. | |
3613 | */ | |
a4f5ea64 | 3614 | ret = i915_gem_object_pin_pages(obj); |
43566ded CW |
3615 | if (ret) |
3616 | return ret; | |
3617 | ||
ef74921b | 3618 | flush_write_domain(obj, ~I915_GEM_DOMAIN_GTT); |
1c5d22f7 | 3619 | |
d0a57789 CW |
3620 | /* Serialise direct access to this object with the barriers for |
3621 | * coherent writes from the GPU, by effectively invalidating the | |
3622 | * GTT domain upon first access. | |
3623 | */ | |
3624 | if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0) | |
3625 | mb(); | |
3626 | ||
e47c68e9 EA |
3627 | /* It should now be out of any other write domains, and we can update |
3628 | * the domain values for our changes. | |
3629 | */ | |
40e62d5d | 3630 | GEM_BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0); |
05394f39 | 3631 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; |
e47c68e9 | 3632 | if (write) { |
05394f39 CW |
3633 | obj->base.read_domains = I915_GEM_DOMAIN_GTT; |
3634 | obj->base.write_domain = I915_GEM_DOMAIN_GTT; | |
a4f5ea64 | 3635 | obj->mm.dirty = true; |
2ef7eeaa EA |
3636 | } |
3637 | ||
a4f5ea64 | 3638 | i915_gem_object_unpin_pages(obj); |
e47c68e9 EA |
3639 | return 0; |
3640 | } | |
3641 | ||
ef55f92a CW |
3642 | /** |
3643 | * Changes the cache-level of an object across all VMA. | |
14bb2c11 TU |
3644 | * @obj: object to act on |
3645 | * @cache_level: new cache level to set for the object | |
ef55f92a CW |
3646 | * |
3647 | * After this function returns, the object will be in the new cache-level | |
3648 | * across all GTT and the contents of the backing storage will be coherent, | |
3649 | * with respect to the new cache-level. In order to keep the backing storage | |
3650 | * coherent for all users, we only allow a single cache level to be set | |
3651 | * globally on the object and prevent it from being changed whilst the | |
3652 | * hardware is reading from the object. That is if the object is currently | |
3653 | * on the scanout it will be set to uncached (or equivalent display | |
3654 | * cache coherency) and all non-MOCS GPU access will also be uncached so | |
3655 | * that all direct access to the scanout remains coherent. | |
3656 | */ | |
e4ffd173 CW |
3657 | int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj, |
3658 | enum i915_cache_level cache_level) | |
3659 | { | |
aa653a68 | 3660 | struct i915_vma *vma; |
a6a7cc4b | 3661 | int ret; |
e4ffd173 | 3662 | |
4c7d62c6 CW |
3663 | lockdep_assert_held(&obj->base.dev->struct_mutex); |
3664 | ||
e4ffd173 | 3665 | if (obj->cache_level == cache_level) |
a6a7cc4b | 3666 | return 0; |
e4ffd173 | 3667 | |
ef55f92a CW |
3668 | /* Inspect the list of currently bound VMA and unbind any that would |
3669 | * be invalid given the new cache-level. This is principally to | |
3670 | * catch the issue of the CS prefetch crossing page boundaries and | |
3671 | * reading an invalid PTE on older architectures. | |
3672 | */ | |
aa653a68 CW |
3673 | restart: |
3674 | list_for_each_entry(vma, &obj->vma_list, obj_link) { | |
ef55f92a CW |
3675 | if (!drm_mm_node_allocated(&vma->node)) |
3676 | continue; | |
3677 | ||
20dfbde4 | 3678 | if (i915_vma_is_pinned(vma)) { |
ef55f92a CW |
3679 | DRM_DEBUG("can not change the cache level of pinned objects\n"); |
3680 | return -EBUSY; | |
3681 | } | |
3682 | ||
aa653a68 CW |
3683 | if (i915_gem_valid_gtt_space(vma, cache_level)) |
3684 | continue; | |
3685 | ||
3686 | ret = i915_vma_unbind(vma); | |
3687 | if (ret) | |
3688 | return ret; | |
3689 | ||
3690 | /* As unbinding may affect other elements in the | |
3691 | * obj->vma_list (due to side-effects from retiring | |
3692 | * an active vma), play safe and restart the iterator. | |
3693 | */ | |
3694 | goto restart; | |
42d6ab48 CW |
3695 | } |
3696 | ||
ef55f92a CW |
3697 | /* We can reuse the existing drm_mm nodes but need to change the |
3698 | * cache-level on the PTE. We could simply unbind them all and | |
3699 | * rebind with the correct cache-level on next use. However since | |
3700 | * we already have a valid slot, dma mapping, pages etc, we may as | |
3701 | * rewrite the PTE in the belief that doing so tramples upon less | |
3702 | * state and so involves less work. | |
3703 | */ | |
15717de2 | 3704 | if (obj->bind_count) { |
ef55f92a CW |
3705 | /* Before we change the PTE, the GPU must not be accessing it. |
3706 | * If we wait upon the object, we know that all the bound | |
3707 | * VMA are no longer active. | |
3708 | */ | |
e95433c7 CW |
3709 | ret = i915_gem_object_wait(obj, |
3710 | I915_WAIT_INTERRUPTIBLE | | |
3711 | I915_WAIT_LOCKED | | |
3712 | I915_WAIT_ALL, | |
3713 | MAX_SCHEDULE_TIMEOUT, | |
3714 | NULL); | |
e4ffd173 CW |
3715 | if (ret) |
3716 | return ret; | |
3717 | ||
0031fb96 TU |
3718 | if (!HAS_LLC(to_i915(obj->base.dev)) && |
3719 | cache_level != I915_CACHE_NONE) { | |
ef55f92a CW |
3720 | /* Access to snoopable pages through the GTT is |
3721 | * incoherent and on some machines causes a hard | |
3722 | * lockup. Relinquish the CPU mmaping to force | |
3723 | * userspace to refault in the pages and we can | |
3724 | * then double check if the GTT mapping is still | |
3725 | * valid for that pointer access. | |
3726 | */ | |
3727 | i915_gem_release_mmap(obj); | |
3728 | ||
3729 | /* As we no longer need a fence for GTT access, | |
3730 | * we can relinquish it now (and so prevent having | |
3731 | * to steal a fence from someone else on the next | |
3732 | * fence request). Note GPU activity would have | |
3733 | * dropped the fence as all snoopable access is | |
3734 | * supposed to be linear. | |
3735 | */ | |
49ef5294 CW |
3736 | list_for_each_entry(vma, &obj->vma_list, obj_link) { |
3737 | ret = i915_vma_put_fence(vma); | |
3738 | if (ret) | |
3739 | return ret; | |
3740 | } | |
ef55f92a CW |
3741 | } else { |
3742 | /* We either have incoherent backing store and | |
3743 | * so no GTT access or the architecture is fully | |
3744 | * coherent. In such cases, existing GTT mmaps | |
3745 | * ignore the cache bit in the PTE and we can | |
3746 | * rewrite it without confusing the GPU or having | |
3747 | * to force userspace to fault back in its mmaps. | |
3748 | */ | |
e4ffd173 CW |
3749 | } |
3750 | ||
1c7f4bca | 3751 | list_for_each_entry(vma, &obj->vma_list, obj_link) { |
ef55f92a CW |
3752 | if (!drm_mm_node_allocated(&vma->node)) |
3753 | continue; | |
3754 | ||
3755 | ret = i915_vma_bind(vma, cache_level, PIN_UPDATE); | |
3756 | if (ret) | |
3757 | return ret; | |
3758 | } | |
e4ffd173 CW |
3759 | } |
3760 | ||
1c7f4bca | 3761 | list_for_each_entry(vma, &obj->vma_list, obj_link) |
2c22569b | 3762 | vma->node.color = cache_level; |
b8f55be6 | 3763 | i915_gem_object_set_cache_coherency(obj, cache_level); |
e27ab73d | 3764 | obj->cache_dirty = true; /* Always invalidate stale cachelines */ |
2c22569b | 3765 | |
e4ffd173 CW |
3766 | return 0; |
3767 | } | |
3768 | ||
199adf40 BW |
3769 | int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data, |
3770 | struct drm_file *file) | |
e6994aee | 3771 | { |
199adf40 | 3772 | struct drm_i915_gem_caching *args = data; |
e6994aee | 3773 | struct drm_i915_gem_object *obj; |
fbbd37b3 | 3774 | int err = 0; |
e6994aee | 3775 | |
fbbd37b3 CW |
3776 | rcu_read_lock(); |
3777 | obj = i915_gem_object_lookup_rcu(file, args->handle); | |
3778 | if (!obj) { | |
3779 | err = -ENOENT; | |
3780 | goto out; | |
3781 | } | |
e6994aee | 3782 | |
651d794f CW |
3783 | switch (obj->cache_level) { |
3784 | case I915_CACHE_LLC: | |
3785 | case I915_CACHE_L3_LLC: | |
3786 | args->caching = I915_CACHING_CACHED; | |
3787 | break; | |
3788 | ||
4257d3ba CW |
3789 | case I915_CACHE_WT: |
3790 | args->caching = I915_CACHING_DISPLAY; | |
3791 | break; | |
3792 | ||
651d794f CW |
3793 | default: |
3794 | args->caching = I915_CACHING_NONE; | |
3795 | break; | |
3796 | } | |
fbbd37b3 CW |
3797 | out: |
3798 | rcu_read_unlock(); | |
3799 | return err; | |
e6994aee CW |
3800 | } |
3801 | ||
199adf40 BW |
3802 | int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data, |
3803 | struct drm_file *file) | |
e6994aee | 3804 | { |
9c870d03 | 3805 | struct drm_i915_private *i915 = to_i915(dev); |
199adf40 | 3806 | struct drm_i915_gem_caching *args = data; |
e6994aee CW |
3807 | struct drm_i915_gem_object *obj; |
3808 | enum i915_cache_level level; | |
d65415df | 3809 | int ret = 0; |
e6994aee | 3810 | |
199adf40 BW |
3811 | switch (args->caching) { |
3812 | case I915_CACHING_NONE: | |
e6994aee CW |
3813 | level = I915_CACHE_NONE; |
3814 | break; | |
199adf40 | 3815 | case I915_CACHING_CACHED: |
e5756c10 ID |
3816 | /* |
3817 | * Due to a HW issue on BXT A stepping, GPU stores via a | |
3818 | * snooped mapping may leave stale data in a corresponding CPU | |
3819 | * cacheline, whereas normally such cachelines would get | |
3820 | * invalidated. | |
3821 | */ | |
9c870d03 | 3822 | if (!HAS_LLC(i915) && !HAS_SNOOP(i915)) |
e5756c10 ID |
3823 | return -ENODEV; |
3824 | ||
e6994aee CW |
3825 | level = I915_CACHE_LLC; |
3826 | break; | |
4257d3ba | 3827 | case I915_CACHING_DISPLAY: |
9c870d03 | 3828 | level = HAS_WT(i915) ? I915_CACHE_WT : I915_CACHE_NONE; |
4257d3ba | 3829 | break; |
e6994aee CW |
3830 | default: |
3831 | return -EINVAL; | |
3832 | } | |
3833 | ||
d65415df CW |
3834 | obj = i915_gem_object_lookup(file, args->handle); |
3835 | if (!obj) | |
3836 | return -ENOENT; | |
3837 | ||
3838 | if (obj->cache_level == level) | |
3839 | goto out; | |
3840 | ||
3841 | ret = i915_gem_object_wait(obj, | |
3842 | I915_WAIT_INTERRUPTIBLE, | |
3843 | MAX_SCHEDULE_TIMEOUT, | |
3844 | to_rps_client(file)); | |
3bc2913e | 3845 | if (ret) |
d65415df | 3846 | goto out; |
3bc2913e | 3847 | |
d65415df CW |
3848 | ret = i915_mutex_lock_interruptible(dev); |
3849 | if (ret) | |
3850 | goto out; | |
e6994aee CW |
3851 | |
3852 | ret = i915_gem_object_set_cache_level(obj, level); | |
e6994aee | 3853 | mutex_unlock(&dev->struct_mutex); |
d65415df CW |
3854 | |
3855 | out: | |
3856 | i915_gem_object_put(obj); | |
e6994aee CW |
3857 | return ret; |
3858 | } | |
3859 | ||
b9241ea3 | 3860 | /* |
2da3b9b9 CW |
3861 | * Prepare buffer for display plane (scanout, cursors, etc). |
3862 | * Can be called from an uninterruptible phase (modesetting) and allows | |
3863 | * any flushes to be pipelined (for pageflips). | |
b9241ea3 | 3864 | */ |
058d88c4 | 3865 | struct i915_vma * |
2da3b9b9 CW |
3866 | i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, |
3867 | u32 alignment, | |
e6617330 | 3868 | const struct i915_ggtt_view *view) |
b9241ea3 | 3869 | { |
058d88c4 | 3870 | struct i915_vma *vma; |
b9241ea3 ZW |
3871 | int ret; |
3872 | ||
4c7d62c6 CW |
3873 | lockdep_assert_held(&obj->base.dev->struct_mutex); |
3874 | ||
bd3d2252 | 3875 | /* Mark the global pin early so that we account for the |
cc98b413 CW |
3876 | * display coherency whilst setting up the cache domains. |
3877 | */ | |
bd3d2252 | 3878 | obj->pin_global++; |
cc98b413 | 3879 | |
a7ef0640 EA |
3880 | /* The display engine is not coherent with the LLC cache on gen6. As |
3881 | * a result, we make sure that the pinning that is about to occur is | |
3882 | * done with uncached PTEs. This is lowest common denominator for all | |
3883 | * chipsets. | |
3884 | * | |
3885 | * However for gen6+, we could do better by using the GFDT bit instead | |
3886 | * of uncaching, which would allow us to flush all the LLC-cached data | |
3887 | * with that bit in the PTE to main memory with just one PIPE_CONTROL. | |
3888 | */ | |
651d794f | 3889 | ret = i915_gem_object_set_cache_level(obj, |
8652744b TU |
3890 | HAS_WT(to_i915(obj->base.dev)) ? |
3891 | I915_CACHE_WT : I915_CACHE_NONE); | |
058d88c4 CW |
3892 | if (ret) { |
3893 | vma = ERR_PTR(ret); | |
bd3d2252 | 3894 | goto err_unpin_global; |
058d88c4 | 3895 | } |
a7ef0640 | 3896 | |
2da3b9b9 CW |
3897 | /* As the user may map the buffer once pinned in the display plane |
3898 | * (e.g. libkms for the bootup splash), we have to ensure that we | |
2efb813d CW |
3899 | * always use map_and_fenceable for all scanout buffers. However, |
3900 | * it may simply be too big to fit into mappable, in which case | |
3901 | * put it anyway and hope that userspace can cope (but always first | |
3902 | * try to preserve the existing ABI). | |
2da3b9b9 | 3903 | */ |
2efb813d | 3904 | vma = ERR_PTR(-ENOSPC); |
47a8e3f6 | 3905 | if (!view || view->type == I915_GGTT_VIEW_NORMAL) |
2efb813d CW |
3906 | vma = i915_gem_object_ggtt_pin(obj, view, 0, alignment, |
3907 | PIN_MAPPABLE | PIN_NONBLOCK); | |
767a222e CW |
3908 | if (IS_ERR(vma)) { |
3909 | struct drm_i915_private *i915 = to_i915(obj->base.dev); | |
3910 | unsigned int flags; | |
3911 | ||
3912 | /* Valleyview is definitely limited to scanning out the first | |
3913 | * 512MiB. Lets presume this behaviour was inherited from the | |
3914 | * g4x display engine and that all earlier gen are similarly | |
3915 | * limited. Testing suggests that it is a little more | |
3916 | * complicated than this. For example, Cherryview appears quite | |
3917 | * happy to scanout from anywhere within its global aperture. | |
3918 | */ | |
3919 | flags = 0; | |
3920 | if (HAS_GMCH_DISPLAY(i915)) | |
3921 | flags = PIN_MAPPABLE; | |
3922 | vma = i915_gem_object_ggtt_pin(obj, view, 0, alignment, flags); | |
3923 | } | |
058d88c4 | 3924 | if (IS_ERR(vma)) |
bd3d2252 | 3925 | goto err_unpin_global; |
2da3b9b9 | 3926 | |
d8923dcf CW |
3927 | vma->display_alignment = max_t(u64, vma->display_alignment, alignment); |
3928 | ||
a6a7cc4b | 3929 | /* Treat this as an end-of-frame, like intel_user_framebuffer_dirty() */ |
5a97bcc6 | 3930 | __i915_gem_object_flush_for_display(obj); |
d59b21ec | 3931 | intel_fb_obj_flush(obj, ORIGIN_DIRTYFB); |
b118c1e3 | 3932 | |
2da3b9b9 CW |
3933 | /* It should now be out of any other write domains, and we can update |
3934 | * the domain values for our changes. | |
3935 | */ | |
05394f39 | 3936 | obj->base.read_domains |= I915_GEM_DOMAIN_GTT; |
b9241ea3 | 3937 | |
058d88c4 | 3938 | return vma; |
cc98b413 | 3939 | |
bd3d2252 CW |
3940 | err_unpin_global: |
3941 | obj->pin_global--; | |
058d88c4 | 3942 | return vma; |
cc98b413 CW |
3943 | } |
3944 | ||
3945 | void | |
058d88c4 | 3946 | i915_gem_object_unpin_from_display_plane(struct i915_vma *vma) |
cc98b413 | 3947 | { |
49d73912 | 3948 | lockdep_assert_held(&vma->vm->i915->drm.struct_mutex); |
4c7d62c6 | 3949 | |
bd3d2252 | 3950 | if (WARN_ON(vma->obj->pin_global == 0)) |
8a0c39b1 TU |
3951 | return; |
3952 | ||
bd3d2252 | 3953 | if (--vma->obj->pin_global == 0) |
f51455d4 | 3954 | vma->display_alignment = I915_GTT_MIN_ALIGNMENT; |
e6617330 | 3955 | |
383d5823 | 3956 | /* Bump the LRU to try and avoid premature eviction whilst flipping */ |
befedbb7 | 3957 | i915_gem_object_bump_inactive_ggtt(vma->obj); |
383d5823 | 3958 | |
058d88c4 | 3959 | i915_vma_unpin(vma); |
b9241ea3 ZW |
3960 | } |
3961 | ||
e47c68e9 EA |
3962 | /** |
3963 | * Moves a single object to the CPU read, and possibly write domain. | |
14bb2c11 TU |
3964 | * @obj: object to act on |
3965 | * @write: requesting write or read-only access | |
e47c68e9 EA |
3966 | * |
3967 | * This function returns when the move is complete, including waiting on | |
3968 | * flushes to occur. | |
3969 | */ | |
dabdfe02 | 3970 | int |
919926ae | 3971 | i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write) |
e47c68e9 | 3972 | { |
e47c68e9 EA |
3973 | int ret; |
3974 | ||
e95433c7 | 3975 | lockdep_assert_held(&obj->base.dev->struct_mutex); |
4c7d62c6 | 3976 | |
e95433c7 CW |
3977 | ret = i915_gem_object_wait(obj, |
3978 | I915_WAIT_INTERRUPTIBLE | | |
3979 | I915_WAIT_LOCKED | | |
3980 | (write ? I915_WAIT_ALL : 0), | |
3981 | MAX_SCHEDULE_TIMEOUT, | |
3982 | NULL); | |
88241785 CW |
3983 | if (ret) |
3984 | return ret; | |
3985 | ||
ef74921b | 3986 | flush_write_domain(obj, ~I915_GEM_DOMAIN_CPU); |
2ef7eeaa | 3987 | |
e47c68e9 | 3988 | /* Flush the CPU cache if it's still invalid. */ |
05394f39 | 3989 | if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) { |
57822dc6 | 3990 | i915_gem_clflush_object(obj, I915_CLFLUSH_SYNC); |
05394f39 | 3991 | obj->base.read_domains |= I915_GEM_DOMAIN_CPU; |
2ef7eeaa EA |
3992 | } |
3993 | ||
3994 | /* It should now be out of any other write domains, and we can update | |
3995 | * the domain values for our changes. | |
3996 | */ | |
e27ab73d | 3997 | GEM_BUG_ON(obj->base.write_domain & ~I915_GEM_DOMAIN_CPU); |
e47c68e9 EA |
3998 | |
3999 | /* If we're writing through the CPU, then the GPU read domains will | |
4000 | * need to be invalidated at next use. | |
4001 | */ | |
e27ab73d CW |
4002 | if (write) |
4003 | __start_cpu_write(obj); | |
2ef7eeaa EA |
4004 | |
4005 | return 0; | |
4006 | } | |
4007 | ||
673a394b EA |
4008 | /* Throttle our rendering by waiting until the ring has completed our requests |
4009 | * emitted over 20 msec ago. | |
4010 | * | |
b962442e EA |
4011 | * Note that if we were to use the current jiffies each time around the loop, |
4012 | * we wouldn't escape the function with any frames outstanding if the time to | |
4013 | * render a frame was over 20ms. | |
4014 | * | |
673a394b EA |
4015 | * This should get us reasonable parallelism between CPU and GPU but also |
4016 | * relatively low latency when blocking on a particular request to finish. | |
4017 | */ | |
40a5f0de | 4018 | static int |
f787a5f5 | 4019 | i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file) |
40a5f0de | 4020 | { |
fac5e23e | 4021 | struct drm_i915_private *dev_priv = to_i915(dev); |
f787a5f5 | 4022 | struct drm_i915_file_private *file_priv = file->driver_priv; |
d0bc54f2 | 4023 | unsigned long recent_enough = jiffies - DRM_I915_THROTTLE_JIFFIES; |
54fb2411 | 4024 | struct drm_i915_gem_request *request, *target = NULL; |
e95433c7 | 4025 | long ret; |
93533c29 | 4026 | |
f4457ae7 CW |
4027 | /* ABI: return -EIO if already wedged */ |
4028 | if (i915_terminally_wedged(&dev_priv->gpu_error)) | |
4029 | return -EIO; | |
e110e8d6 | 4030 | |
1c25595f | 4031 | spin_lock(&file_priv->mm.lock); |
c8659efa | 4032 | list_for_each_entry(request, &file_priv->mm.request_list, client_link) { |
b962442e EA |
4033 | if (time_after_eq(request->emitted_jiffies, recent_enough)) |
4034 | break; | |
40a5f0de | 4035 | |
c8659efa CW |
4036 | if (target) { |
4037 | list_del(&target->client_link); | |
4038 | target->file_priv = NULL; | |
4039 | } | |
fcfa423c | 4040 | |
54fb2411 | 4041 | target = request; |
b962442e | 4042 | } |
ff865885 | 4043 | if (target) |
e8a261ea | 4044 | i915_gem_request_get(target); |
1c25595f | 4045 | spin_unlock(&file_priv->mm.lock); |
40a5f0de | 4046 | |
54fb2411 | 4047 | if (target == NULL) |
f787a5f5 | 4048 | return 0; |
2bc43b5c | 4049 | |
e95433c7 CW |
4050 | ret = i915_wait_request(target, |
4051 | I915_WAIT_INTERRUPTIBLE, | |
4052 | MAX_SCHEDULE_TIMEOUT); | |
e8a261ea | 4053 | i915_gem_request_put(target); |
ff865885 | 4054 | |
e95433c7 | 4055 | return ret < 0 ? ret : 0; |
40a5f0de EA |
4056 | } |
4057 | ||
058d88c4 | 4058 | struct i915_vma * |
ec7adb6e JL |
4059 | i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj, |
4060 | const struct i915_ggtt_view *view, | |
91b2db6f | 4061 | u64 size, |
2ffffd0f CW |
4062 | u64 alignment, |
4063 | u64 flags) | |
ec7adb6e | 4064 | { |
ad16d2ed CW |
4065 | struct drm_i915_private *dev_priv = to_i915(obj->base.dev); |
4066 | struct i915_address_space *vm = &dev_priv->ggtt.base; | |
59bfa124 CW |
4067 | struct i915_vma *vma; |
4068 | int ret; | |
72e96d64 | 4069 | |
4c7d62c6 CW |
4070 | lockdep_assert_held(&obj->base.dev->struct_mutex); |
4071 | ||
43ae70d9 CW |
4072 | if (!view && flags & PIN_MAPPABLE) { |
4073 | /* If the required space is larger than the available | |
4074 | * aperture, we will not able to find a slot for the | |
4075 | * object and unbinding the object now will be in | |
4076 | * vain. Worse, doing so may cause us to ping-pong | |
4077 | * the object in and out of the Global GTT and | |
4078 | * waste a lot of cycles under the mutex. | |
4079 | */ | |
4080 | if (obj->base.size > dev_priv->ggtt.mappable_end) | |
4081 | return ERR_PTR(-E2BIG); | |
4082 | ||
4083 | /* If NONBLOCK is set the caller is optimistically | |
4084 | * trying to cache the full object within the mappable | |
4085 | * aperture, and *must* have a fallback in place for | |
4086 | * situations where we cannot bind the object. We | |
4087 | * can be a little more lax here and use the fallback | |
4088 | * more often to avoid costly migrations of ourselves | |
4089 | * and other objects within the aperture. | |
4090 | * | |
4091 | * Half-the-aperture is used as a simple heuristic. | |
4092 | * More interesting would to do search for a free | |
4093 | * block prior to making the commitment to unbind. | |
4094 | * That caters for the self-harm case, and with a | |
4095 | * little more heuristics (e.g. NOFAULT, NOEVICT) | |
4096 | * we could try to minimise harm to others. | |
4097 | */ | |
4098 | if (flags & PIN_NONBLOCK && | |
4099 | obj->base.size > dev_priv->ggtt.mappable_end / 2) | |
4100 | return ERR_PTR(-ENOSPC); | |
4101 | } | |
4102 | ||
718659a6 | 4103 | vma = i915_vma_instance(obj, vm, view); |
e0216b76 | 4104 | if (unlikely(IS_ERR(vma))) |
058d88c4 | 4105 | return vma; |
59bfa124 CW |
4106 | |
4107 | if (i915_vma_misplaced(vma, size, alignment, flags)) { | |
43ae70d9 CW |
4108 | if (flags & PIN_NONBLOCK) { |
4109 | if (i915_vma_is_pinned(vma) || i915_vma_is_active(vma)) | |
4110 | return ERR_PTR(-ENOSPC); | |
59bfa124 | 4111 | |
43ae70d9 | 4112 | if (flags & PIN_MAPPABLE && |
944397f0 | 4113 | vma->fence_size > dev_priv->ggtt.mappable_end / 2) |
ad16d2ed CW |
4114 | return ERR_PTR(-ENOSPC); |
4115 | } | |
4116 | ||
59bfa124 CW |
4117 | WARN(i915_vma_is_pinned(vma), |
4118 | "bo is already pinned in ggtt with incorrect alignment:" | |
05a20d09 CW |
4119 | " offset=%08x, req.alignment=%llx," |
4120 | " req.map_and_fenceable=%d, vma->map_and_fenceable=%d\n", | |
4121 | i915_ggtt_offset(vma), alignment, | |
59bfa124 | 4122 | !!(flags & PIN_MAPPABLE), |
05a20d09 | 4123 | i915_vma_is_map_and_fenceable(vma)); |
59bfa124 CW |
4124 | ret = i915_vma_unbind(vma); |
4125 | if (ret) | |
058d88c4 | 4126 | return ERR_PTR(ret); |
59bfa124 CW |
4127 | } |
4128 | ||
058d88c4 CW |
4129 | ret = i915_vma_pin(vma, size, alignment, flags | PIN_GLOBAL); |
4130 | if (ret) | |
4131 | return ERR_PTR(ret); | |
ec7adb6e | 4132 | |
058d88c4 | 4133 | return vma; |
673a394b EA |
4134 | } |
4135 | ||
edf6b76f | 4136 | static __always_inline unsigned int __busy_read_flag(unsigned int id) |
3fdc13c7 CW |
4137 | { |
4138 | /* Note that we could alias engines in the execbuf API, but | |
4139 | * that would be very unwise as it prevents userspace from | |
4140 | * fine control over engine selection. Ahem. | |
4141 | * | |
4142 | * This should be something like EXEC_MAX_ENGINE instead of | |
4143 | * I915_NUM_ENGINES. | |
4144 | */ | |
4145 | BUILD_BUG_ON(I915_NUM_ENGINES > 16); | |
4146 | return 0x10000 << id; | |
4147 | } | |
4148 | ||
4149 | static __always_inline unsigned int __busy_write_id(unsigned int id) | |
4150 | { | |
70cb472c CW |
4151 | /* The uABI guarantees an active writer is also amongst the read |
4152 | * engines. This would be true if we accessed the activity tracking | |
4153 | * under the lock, but as we perform the lookup of the object and | |
4154 | * its activity locklessly we can not guarantee that the last_write | |
4155 | * being active implies that we have set the same engine flag from | |
4156 | * last_read - hence we always set both read and write busy for | |
4157 | * last_write. | |
4158 | */ | |
4159 | return id | __busy_read_flag(id); | |
3fdc13c7 CW |
4160 | } |
4161 | ||
edf6b76f | 4162 | static __always_inline unsigned int |
d07f0e59 | 4163 | __busy_set_if_active(const struct dma_fence *fence, |
3fdc13c7 CW |
4164 | unsigned int (*flag)(unsigned int id)) |
4165 | { | |
d07f0e59 | 4166 | struct drm_i915_gem_request *rq; |
3fdc13c7 | 4167 | |
d07f0e59 CW |
4168 | /* We have to check the current hw status of the fence as the uABI |
4169 | * guarantees forward progress. We could rely on the idle worker | |
4170 | * to eventually flush us, but to minimise latency just ask the | |
4171 | * hardware. | |
1255501d | 4172 | * |
d07f0e59 | 4173 | * Note we only report on the status of native fences. |
1255501d | 4174 | */ |
d07f0e59 CW |
4175 | if (!dma_fence_is_i915(fence)) |
4176 | return 0; | |
4177 | ||
4178 | /* opencode to_request() in order to avoid const warnings */ | |
4179 | rq = container_of(fence, struct drm_i915_gem_request, fence); | |
4180 | if (i915_gem_request_completed(rq)) | |
4181 | return 0; | |
4182 | ||
1d39f281 | 4183 | return flag(rq->engine->uabi_id); |
3fdc13c7 CW |
4184 | } |
4185 | ||
edf6b76f | 4186 | static __always_inline unsigned int |
d07f0e59 | 4187 | busy_check_reader(const struct dma_fence *fence) |
3fdc13c7 | 4188 | { |
d07f0e59 | 4189 | return __busy_set_if_active(fence, __busy_read_flag); |
3fdc13c7 CW |
4190 | } |
4191 | ||
edf6b76f | 4192 | static __always_inline unsigned int |
d07f0e59 | 4193 | busy_check_writer(const struct dma_fence *fence) |
3fdc13c7 | 4194 | { |
d07f0e59 CW |
4195 | if (!fence) |
4196 | return 0; | |
4197 | ||
4198 | return __busy_set_if_active(fence, __busy_write_id); | |
3fdc13c7 CW |
4199 | } |
4200 | ||
673a394b EA |
4201 | int |
4202 | i915_gem_busy_ioctl(struct drm_device *dev, void *data, | |
05394f39 | 4203 | struct drm_file *file) |
673a394b EA |
4204 | { |
4205 | struct drm_i915_gem_busy *args = data; | |
05394f39 | 4206 | struct drm_i915_gem_object *obj; |
d07f0e59 CW |
4207 | struct reservation_object_list *list; |
4208 | unsigned int seq; | |
fbbd37b3 | 4209 | int err; |
673a394b | 4210 | |
d07f0e59 | 4211 | err = -ENOENT; |
fbbd37b3 CW |
4212 | rcu_read_lock(); |
4213 | obj = i915_gem_object_lookup_rcu(file, args->handle); | |
d07f0e59 | 4214 | if (!obj) |
fbbd37b3 | 4215 | goto out; |
d1b851fc | 4216 | |
d07f0e59 CW |
4217 | /* A discrepancy here is that we do not report the status of |
4218 | * non-i915 fences, i.e. even though we may report the object as idle, | |
4219 | * a call to set-domain may still stall waiting for foreign rendering. | |
4220 | * This also means that wait-ioctl may report an object as busy, | |
4221 | * where busy-ioctl considers it idle. | |
4222 | * | |
4223 | * We trade the ability to warn of foreign fences to report on which | |
4224 | * i915 engines are active for the object. | |
4225 | * | |
4226 | * Alternatively, we can trade that extra information on read/write | |
4227 | * activity with | |
4228 | * args->busy = | |
4229 | * !reservation_object_test_signaled_rcu(obj->resv, true); | |
4230 | * to report the overall busyness. This is what the wait-ioctl does. | |
4231 | * | |
4232 | */ | |
4233 | retry: | |
4234 | seq = raw_read_seqcount(&obj->resv->seq); | |
426960be | 4235 | |
d07f0e59 CW |
4236 | /* Translate the exclusive fence to the READ *and* WRITE engine */ |
4237 | args->busy = busy_check_writer(rcu_dereference(obj->resv->fence_excl)); | |
3fdc13c7 | 4238 | |
d07f0e59 CW |
4239 | /* Translate shared fences to READ set of engines */ |
4240 | list = rcu_dereference(obj->resv->fence); | |
4241 | if (list) { | |
4242 | unsigned int shared_count = list->shared_count, i; | |
3fdc13c7 | 4243 | |
d07f0e59 CW |
4244 | for (i = 0; i < shared_count; ++i) { |
4245 | struct dma_fence *fence = | |
4246 | rcu_dereference(list->shared[i]); | |
4247 | ||
4248 | args->busy |= busy_check_reader(fence); | |
4249 | } | |
426960be | 4250 | } |
673a394b | 4251 | |
d07f0e59 CW |
4252 | if (args->busy && read_seqcount_retry(&obj->resv->seq, seq)) |
4253 | goto retry; | |
4254 | ||
4255 | err = 0; | |
fbbd37b3 CW |
4256 | out: |
4257 | rcu_read_unlock(); | |
4258 | return err; | |
673a394b EA |
4259 | } |
4260 | ||
4261 | int | |
4262 | i915_gem_throttle_ioctl(struct drm_device *dev, void *data, | |
4263 | struct drm_file *file_priv) | |
4264 | { | |
0206e353 | 4265 | return i915_gem_ring_throttle(dev, file_priv); |
673a394b EA |
4266 | } |
4267 | ||
3ef94daa CW |
4268 | int |
4269 | i915_gem_madvise_ioctl(struct drm_device *dev, void *data, | |
4270 | struct drm_file *file_priv) | |
4271 | { | |
fac5e23e | 4272 | struct drm_i915_private *dev_priv = to_i915(dev); |
3ef94daa | 4273 | struct drm_i915_gem_madvise *args = data; |
05394f39 | 4274 | struct drm_i915_gem_object *obj; |
1233e2db | 4275 | int err; |
3ef94daa CW |
4276 | |
4277 | switch (args->madv) { | |
4278 | case I915_MADV_DONTNEED: | |
4279 | case I915_MADV_WILLNEED: | |
4280 | break; | |
4281 | default: | |
4282 | return -EINVAL; | |
4283 | } | |
4284 | ||
03ac0642 | 4285 | obj = i915_gem_object_lookup(file_priv, args->handle); |
1233e2db CW |
4286 | if (!obj) |
4287 | return -ENOENT; | |
4288 | ||
4289 | err = mutex_lock_interruptible(&obj->mm.lock); | |
4290 | if (err) | |
4291 | goto out; | |
3ef94daa | 4292 | |
f1fa4f44 | 4293 | if (i915_gem_object_has_pages(obj) && |
3e510a8e | 4294 | i915_gem_object_is_tiled(obj) && |
656bfa3a | 4295 | dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) { |
bc0629a7 CW |
4296 | if (obj->mm.madv == I915_MADV_WILLNEED) { |
4297 | GEM_BUG_ON(!obj->mm.quirked); | |
a4f5ea64 | 4298 | __i915_gem_object_unpin_pages(obj); |
bc0629a7 CW |
4299 | obj->mm.quirked = false; |
4300 | } | |
4301 | if (args->madv == I915_MADV_WILLNEED) { | |
2c3a3f44 | 4302 | GEM_BUG_ON(obj->mm.quirked); |
a4f5ea64 | 4303 | __i915_gem_object_pin_pages(obj); |
bc0629a7 CW |
4304 | obj->mm.quirked = true; |
4305 | } | |
656bfa3a DV |
4306 | } |
4307 | ||
a4f5ea64 CW |
4308 | if (obj->mm.madv != __I915_MADV_PURGED) |
4309 | obj->mm.madv = args->madv; | |
3ef94daa | 4310 | |
6c085a72 | 4311 | /* if the object is no longer attached, discard its backing storage */ |
f1fa4f44 CW |
4312 | if (obj->mm.madv == I915_MADV_DONTNEED && |
4313 | !i915_gem_object_has_pages(obj)) | |
2d7ef395 CW |
4314 | i915_gem_object_truncate(obj); |
4315 | ||
a4f5ea64 | 4316 | args->retained = obj->mm.madv != __I915_MADV_PURGED; |
1233e2db | 4317 | mutex_unlock(&obj->mm.lock); |
bb6baf76 | 4318 | |
1233e2db | 4319 | out: |
f8c417cd | 4320 | i915_gem_object_put(obj); |
1233e2db | 4321 | return err; |
3ef94daa CW |
4322 | } |
4323 | ||
5b8c8aec CW |
4324 | static void |
4325 | frontbuffer_retire(struct i915_gem_active *active, | |
4326 | struct drm_i915_gem_request *request) | |
4327 | { | |
4328 | struct drm_i915_gem_object *obj = | |
4329 | container_of(active, typeof(*obj), frontbuffer_write); | |
4330 | ||
d59b21ec | 4331 | intel_fb_obj_flush(obj, ORIGIN_CS); |
5b8c8aec CW |
4332 | } |
4333 | ||
37e680a1 CW |
4334 | void i915_gem_object_init(struct drm_i915_gem_object *obj, |
4335 | const struct drm_i915_gem_object_ops *ops) | |
0327d6ba | 4336 | { |
1233e2db CW |
4337 | mutex_init(&obj->mm.lock); |
4338 | ||
2f633156 | 4339 | INIT_LIST_HEAD(&obj->vma_list); |
d1b48c1e | 4340 | INIT_LIST_HEAD(&obj->lut_list); |
8d9d5744 | 4341 | INIT_LIST_HEAD(&obj->batch_pool_link); |
0327d6ba | 4342 | |
37e680a1 CW |
4343 | obj->ops = ops; |
4344 | ||
d07f0e59 CW |
4345 | reservation_object_init(&obj->__builtin_resv); |
4346 | obj->resv = &obj->__builtin_resv; | |
4347 | ||
50349247 | 4348 | obj->frontbuffer_ggtt_origin = ORIGIN_GTT; |
5b8c8aec | 4349 | init_request_active(&obj->frontbuffer_write, frontbuffer_retire); |
a4f5ea64 CW |
4350 | |
4351 | obj->mm.madv = I915_MADV_WILLNEED; | |
4352 | INIT_RADIX_TREE(&obj->mm.get_page.radix, GFP_KERNEL | __GFP_NOWARN); | |
4353 | mutex_init(&obj->mm.get_page.lock); | |
0327d6ba | 4354 | |
f19ec8cb | 4355 | i915_gem_info_add_obj(to_i915(obj->base.dev), obj->base.size); |
0327d6ba CW |
4356 | } |
4357 | ||
37e680a1 | 4358 | static const struct drm_i915_gem_object_ops i915_gem_object_ops = { |
3599a91c TU |
4359 | .flags = I915_GEM_OBJECT_HAS_STRUCT_PAGE | |
4360 | I915_GEM_OBJECT_IS_SHRINKABLE, | |
7c55e2c5 | 4361 | |
37e680a1 CW |
4362 | .get_pages = i915_gem_object_get_pages_gtt, |
4363 | .put_pages = i915_gem_object_put_pages_gtt, | |
7c55e2c5 CW |
4364 | |
4365 | .pwrite = i915_gem_object_pwrite_gtt, | |
37e680a1 CW |
4366 | }; |
4367 | ||
465c403c MA |
4368 | static int i915_gem_object_create_shmem(struct drm_device *dev, |
4369 | struct drm_gem_object *obj, | |
4370 | size_t size) | |
4371 | { | |
4372 | struct drm_i915_private *i915 = to_i915(dev); | |
4373 | unsigned long flags = VM_NORESERVE; | |
4374 | struct file *filp; | |
4375 | ||
4376 | drm_gem_private_object_init(dev, obj, size); | |
4377 | ||
4378 | if (i915->mm.gemfs) | |
4379 | filp = shmem_file_setup_with_mnt(i915->mm.gemfs, "i915", size, | |
4380 | flags); | |
4381 | else | |
4382 | filp = shmem_file_setup("i915", size, flags); | |
4383 | ||
4384 | if (IS_ERR(filp)) | |
4385 | return PTR_ERR(filp); | |
4386 | ||
4387 | obj->filp = filp; | |
4388 | ||
4389 | return 0; | |
4390 | } | |
4391 | ||
b4bcbe2a | 4392 | struct drm_i915_gem_object * |
12d79d78 | 4393 | i915_gem_object_create(struct drm_i915_private *dev_priv, u64 size) |
ac52bc56 | 4394 | { |
c397b908 | 4395 | struct drm_i915_gem_object *obj; |
5949eac4 | 4396 | struct address_space *mapping; |
b8f55be6 | 4397 | unsigned int cache_level; |
1a240d4d | 4398 | gfp_t mask; |
fe3db79b | 4399 | int ret; |
ac52bc56 | 4400 | |
b4bcbe2a CW |
4401 | /* There is a prevalence of the assumption that we fit the object's |
4402 | * page count inside a 32bit _signed_ variable. Let's document this and | |
4403 | * catch if we ever need to fix it. In the meantime, if you do spot | |
4404 | * such a local variable, please consider fixing! | |
4405 | */ | |
7a3ee5de | 4406 | if (size >> PAGE_SHIFT > INT_MAX) |
b4bcbe2a CW |
4407 | return ERR_PTR(-E2BIG); |
4408 | ||
4409 | if (overflows_type(size, obj->base.size)) | |
4410 | return ERR_PTR(-E2BIG); | |
4411 | ||
187685cb | 4412 | obj = i915_gem_object_alloc(dev_priv); |
c397b908 | 4413 | if (obj == NULL) |
fe3db79b | 4414 | return ERR_PTR(-ENOMEM); |
673a394b | 4415 | |
465c403c | 4416 | ret = i915_gem_object_create_shmem(&dev_priv->drm, &obj->base, size); |
fe3db79b CW |
4417 | if (ret) |
4418 | goto fail; | |
673a394b | 4419 | |
bed1ea95 | 4420 | mask = GFP_HIGHUSER | __GFP_RECLAIMABLE; |
c0f86832 | 4421 | if (IS_I965GM(dev_priv) || IS_I965G(dev_priv)) { |
bed1ea95 CW |
4422 | /* 965gm cannot relocate objects above 4GiB. */ |
4423 | mask &= ~__GFP_HIGHMEM; | |
4424 | mask |= __GFP_DMA32; | |
4425 | } | |
4426 | ||
93c76a3d | 4427 | mapping = obj->base.filp->f_mapping; |
bed1ea95 | 4428 | mapping_set_gfp_mask(mapping, mask); |
4846bf0c | 4429 | GEM_BUG_ON(!(mapping_gfp_mask(mapping) & __GFP_RECLAIM)); |
5949eac4 | 4430 | |
37e680a1 | 4431 | i915_gem_object_init(obj, &i915_gem_object_ops); |
73aa808f | 4432 | |
c397b908 DV |
4433 | obj->base.write_domain = I915_GEM_DOMAIN_CPU; |
4434 | obj->base.read_domains = I915_GEM_DOMAIN_CPU; | |
673a394b | 4435 | |
b8f55be6 | 4436 | if (HAS_LLC(dev_priv)) |
3d29b842 | 4437 | /* On some devices, we can have the GPU use the LLC (the CPU |
a1871112 EA |
4438 | * cache) for about a 10% performance improvement |
4439 | * compared to uncached. Graphics requests other than | |
4440 | * display scanout are coherent with the CPU in | |
4441 | * accessing this cache. This means in this mode we | |
4442 | * don't need to clflush on the CPU side, and on the | |
4443 | * GPU side we only need to flush internal caches to | |
4444 | * get data visible to the CPU. | |
4445 | * | |
4446 | * However, we maintain the display planes as UC, and so | |
4447 | * need to rebind when first used as such. | |
4448 | */ | |
b8f55be6 CW |
4449 | cache_level = I915_CACHE_LLC; |
4450 | else | |
4451 | cache_level = I915_CACHE_NONE; | |
a1871112 | 4452 | |
b8f55be6 | 4453 | i915_gem_object_set_cache_coherency(obj, cache_level); |
e27ab73d | 4454 | |
d861e338 DV |
4455 | trace_i915_gem_object_create(obj); |
4456 | ||
05394f39 | 4457 | return obj; |
fe3db79b CW |
4458 | |
4459 | fail: | |
4460 | i915_gem_object_free(obj); | |
fe3db79b | 4461 | return ERR_PTR(ret); |
c397b908 DV |
4462 | } |
4463 | ||
340fbd8c CW |
4464 | static bool discard_backing_storage(struct drm_i915_gem_object *obj) |
4465 | { | |
4466 | /* If we are the last user of the backing storage (be it shmemfs | |
4467 | * pages or stolen etc), we know that the pages are going to be | |
4468 | * immediately released. In this case, we can then skip copying | |
4469 | * back the contents from the GPU. | |
4470 | */ | |
4471 | ||
a4f5ea64 | 4472 | if (obj->mm.madv != I915_MADV_WILLNEED) |
340fbd8c CW |
4473 | return false; |
4474 | ||
4475 | if (obj->base.filp == NULL) | |
4476 | return true; | |
4477 | ||
4478 | /* At first glance, this looks racy, but then again so would be | |
4479 | * userspace racing mmap against close. However, the first external | |
4480 | * reference to the filp can only be obtained through the | |
4481 | * i915_gem_mmap_ioctl() which safeguards us against the user | |
4482 | * acquiring such a reference whilst we are in the middle of | |
4483 | * freeing the object. | |
4484 | */ | |
4485 | return atomic_long_read(&obj->base.filp->f_count) == 1; | |
4486 | } | |
4487 | ||
fbbd37b3 CW |
4488 | static void __i915_gem_free_objects(struct drm_i915_private *i915, |
4489 | struct llist_node *freed) | |
673a394b | 4490 | { |
fbbd37b3 | 4491 | struct drm_i915_gem_object *obj, *on; |
673a394b | 4492 | |
fbbd37b3 | 4493 | intel_runtime_pm_get(i915); |
cc731f5a | 4494 | llist_for_each_entry_safe(obj, on, freed, freed) { |
fbbd37b3 CW |
4495 | struct i915_vma *vma, *vn; |
4496 | ||
4497 | trace_i915_gem_object_destroy(obj); | |
4498 | ||
cc731f5a CW |
4499 | mutex_lock(&i915->drm.struct_mutex); |
4500 | ||
fbbd37b3 CW |
4501 | GEM_BUG_ON(i915_gem_object_is_active(obj)); |
4502 | list_for_each_entry_safe(vma, vn, | |
4503 | &obj->vma_list, obj_link) { | |
fbbd37b3 CW |
4504 | GEM_BUG_ON(i915_vma_is_active(vma)); |
4505 | vma->flags &= ~I915_VMA_PIN_MASK; | |
4506 | i915_vma_close(vma); | |
4507 | } | |
db6c2b41 CW |
4508 | GEM_BUG_ON(!list_empty(&obj->vma_list)); |
4509 | GEM_BUG_ON(!RB_EMPTY_ROOT(&obj->vma_tree)); | |
fbbd37b3 | 4510 | |
f2123818 CW |
4511 | /* This serializes freeing with the shrinker. Since the free |
4512 | * is delayed, first by RCU then by the workqueue, we want the | |
4513 | * shrinker to be able to free pages of unreferenced objects, | |
4514 | * or else we may oom whilst there are plenty of deferred | |
4515 | * freed objects. | |
4516 | */ | |
4517 | if (i915_gem_object_has_pages(obj)) { | |
4518 | spin_lock(&i915->mm.obj_lock); | |
4519 | list_del_init(&obj->mm.link); | |
4520 | spin_unlock(&i915->mm.obj_lock); | |
4521 | } | |
4522 | ||
cc731f5a | 4523 | mutex_unlock(&i915->drm.struct_mutex); |
fbbd37b3 | 4524 | |
fbbd37b3 | 4525 | GEM_BUG_ON(obj->bind_count); |
a65adaf8 | 4526 | GEM_BUG_ON(obj->userfault_count); |
fbbd37b3 | 4527 | GEM_BUG_ON(atomic_read(&obj->frontbuffer_bits)); |
67b48040 | 4528 | GEM_BUG_ON(!list_empty(&obj->lut_list)); |
fbbd37b3 CW |
4529 | |
4530 | if (obj->ops->release) | |
4531 | obj->ops->release(obj); | |
f65c9168 | 4532 | |
fbbd37b3 CW |
4533 | if (WARN_ON(i915_gem_object_has_pinned_pages(obj))) |
4534 | atomic_set(&obj->mm.pages_pin_count, 0); | |
548625ee | 4535 | __i915_gem_object_put_pages(obj, I915_MM_NORMAL); |
f1fa4f44 | 4536 | GEM_BUG_ON(i915_gem_object_has_pages(obj)); |
fbbd37b3 CW |
4537 | |
4538 | if (obj->base.import_attach) | |
4539 | drm_prime_gem_destroy(&obj->base, NULL); | |
4540 | ||
d07f0e59 | 4541 | reservation_object_fini(&obj->__builtin_resv); |
fbbd37b3 CW |
4542 | drm_gem_object_release(&obj->base); |
4543 | i915_gem_info_remove_obj(i915, obj->base.size); | |
4544 | ||
4545 | kfree(obj->bit_17); | |
4546 | i915_gem_object_free(obj); | |
cc731f5a CW |
4547 | |
4548 | if (on) | |
4549 | cond_resched(); | |
fbbd37b3 | 4550 | } |
cc731f5a | 4551 | intel_runtime_pm_put(i915); |
fbbd37b3 CW |
4552 | } |
4553 | ||
4554 | static void i915_gem_flush_free_objects(struct drm_i915_private *i915) | |
4555 | { | |
4556 | struct llist_node *freed; | |
4557 | ||
87701b4b CW |
4558 | /* Free the oldest, most stale object to keep the free_list short */ |
4559 | freed = NULL; | |
4560 | if (!llist_empty(&i915->mm.free_list)) { /* quick test for hotpath */ | |
4561 | /* Only one consumer of llist_del_first() allowed */ | |
4562 | spin_lock(&i915->mm.free_lock); | |
4563 | freed = llist_del_first(&i915->mm.free_list); | |
4564 | spin_unlock(&i915->mm.free_lock); | |
4565 | } | |
4566 | if (unlikely(freed)) { | |
4567 | freed->next = NULL; | |
fbbd37b3 | 4568 | __i915_gem_free_objects(i915, freed); |
87701b4b | 4569 | } |
fbbd37b3 CW |
4570 | } |
4571 | ||
4572 | static void __i915_gem_free_work(struct work_struct *work) | |
4573 | { | |
4574 | struct drm_i915_private *i915 = | |
4575 | container_of(work, struct drm_i915_private, mm.free_work); | |
4576 | struct llist_node *freed; | |
26e12f89 | 4577 | |
b1f788c6 CW |
4578 | /* All file-owned VMA should have been released by this point through |
4579 | * i915_gem_close_object(), or earlier by i915_gem_context_close(). | |
4580 | * However, the object may also be bound into the global GTT (e.g. | |
4581 | * older GPUs without per-process support, or for direct access through | |
4582 | * the GTT either for the user or for scanout). Those VMA still need to | |
4583 | * unbound now. | |
4584 | */ | |
1488fc08 | 4585 | |
5ad08be7 | 4586 | while ((freed = llist_del_all(&i915->mm.free_list))) { |
fbbd37b3 | 4587 | __i915_gem_free_objects(i915, freed); |
5ad08be7 CW |
4588 | if (need_resched()) |
4589 | break; | |
4590 | } | |
fbbd37b3 | 4591 | } |
a071fa00 | 4592 | |
fbbd37b3 CW |
4593 | static void __i915_gem_free_object_rcu(struct rcu_head *head) |
4594 | { | |
4595 | struct drm_i915_gem_object *obj = | |
4596 | container_of(head, typeof(*obj), rcu); | |
4597 | struct drm_i915_private *i915 = to_i915(obj->base.dev); | |
4598 | ||
4599 | /* We can't simply use call_rcu() from i915_gem_free_object() | |
4600 | * as we need to block whilst unbinding, and the call_rcu | |
4601 | * task may be called from softirq context. So we take a | |
4602 | * detour through a worker. | |
4603 | */ | |
4604 | if (llist_add(&obj->freed, &i915->mm.free_list)) | |
4605 | schedule_work(&i915->mm.free_work); | |
4606 | } | |
656bfa3a | 4607 | |
fbbd37b3 CW |
4608 | void i915_gem_free_object(struct drm_gem_object *gem_obj) |
4609 | { | |
4610 | struct drm_i915_gem_object *obj = to_intel_bo(gem_obj); | |
a4f5ea64 | 4611 | |
bc0629a7 CW |
4612 | if (obj->mm.quirked) |
4613 | __i915_gem_object_unpin_pages(obj); | |
4614 | ||
340fbd8c | 4615 | if (discard_backing_storage(obj)) |
a4f5ea64 | 4616 | obj->mm.madv = I915_MADV_DONTNEED; |
de151cf6 | 4617 | |
fbbd37b3 CW |
4618 | /* Before we free the object, make sure any pure RCU-only |
4619 | * read-side critical sections are complete, e.g. | |
4620 | * i915_gem_busy_ioctl(). For the corresponding synchronized | |
4621 | * lookup see i915_gem_object_lookup_rcu(). | |
4622 | */ | |
4623 | call_rcu(&obj->rcu, __i915_gem_free_object_rcu); | |
673a394b EA |
4624 | } |
4625 | ||
f8a7fde4 CW |
4626 | void __i915_gem_object_release_unless_active(struct drm_i915_gem_object *obj) |
4627 | { | |
4628 | lockdep_assert_held(&obj->base.dev->struct_mutex); | |
4629 | ||
d1b48c1e CW |
4630 | if (!i915_gem_object_has_active_reference(obj) && |
4631 | i915_gem_object_is_active(obj)) | |
f8a7fde4 CW |
4632 | i915_gem_object_set_active_reference(obj); |
4633 | else | |
4634 | i915_gem_object_put(obj); | |
4635 | } | |
4636 | ||
3033acab CW |
4637 | static void assert_kernel_context_is_current(struct drm_i915_private *dev_priv) |
4638 | { | |
4639 | struct intel_engine_cs *engine; | |
4640 | enum intel_engine_id id; | |
4641 | ||
4642 | for_each_engine(engine, dev_priv, id) | |
f131e356 CW |
4643 | GEM_BUG_ON(engine->last_retired_context && |
4644 | !i915_gem_context_is_kernel(engine->last_retired_context)); | |
3033acab CW |
4645 | } |
4646 | ||
24145517 CW |
4647 | void i915_gem_sanitize(struct drm_i915_private *i915) |
4648 | { | |
f36325f3 CW |
4649 | if (i915_terminally_wedged(&i915->gpu_error)) { |
4650 | mutex_lock(&i915->drm.struct_mutex); | |
4651 | i915_gem_unset_wedged(i915); | |
4652 | mutex_unlock(&i915->drm.struct_mutex); | |
4653 | } | |
4654 | ||
24145517 CW |
4655 | /* |
4656 | * If we inherit context state from the BIOS or earlier occupants | |
4657 | * of the GPU, the GPU may be in an inconsistent state when we | |
4658 | * try to take over. The only way to remove the earlier state | |
4659 | * is by resetting. However, resetting on earlier gen is tricky as | |
4660 | * it may impact the display and we are uncertain about the stability | |
ea117b8d | 4661 | * of the reset, so this could be applied to even earlier gen. |
24145517 | 4662 | */ |
ea117b8d | 4663 | if (INTEL_GEN(i915) >= 5) { |
24145517 CW |
4664 | int reset = intel_gpu_reset(i915, ALL_ENGINES); |
4665 | WARN_ON(reset && reset != -ENODEV); | |
4666 | } | |
4667 | } | |
4668 | ||
bf9e8429 | 4669 | int i915_gem_suspend(struct drm_i915_private *dev_priv) |
29105ccc | 4670 | { |
bf9e8429 | 4671 | struct drm_device *dev = &dev_priv->drm; |
dcff85c8 | 4672 | int ret; |
28dfe52a | 4673 | |
c998e8a0 | 4674 | intel_runtime_pm_get(dev_priv); |
54b4f68f CW |
4675 | intel_suspend_gt_powersave(dev_priv); |
4676 | ||
45c5f202 | 4677 | mutex_lock(&dev->struct_mutex); |
5ab57c70 CW |
4678 | |
4679 | /* We have to flush all the executing contexts to main memory so | |
4680 | * that they can saved in the hibernation image. To ensure the last | |
4681 | * context image is coherent, we have to switch away from it. That | |
4682 | * leaves the dev_priv->kernel_context still active when | |
4683 | * we actually suspend, and its image in memory may not match the GPU | |
4684 | * state. Fortunately, the kernel_context is disposable and we do | |
4685 | * not rely on its state. | |
4686 | */ | |
4687 | ret = i915_gem_switch_to_kernel_context(dev_priv); | |
4688 | if (ret) | |
c998e8a0 | 4689 | goto err_unlock; |
5ab57c70 | 4690 | |
22dd3bb9 CW |
4691 | ret = i915_gem_wait_for_idle(dev_priv, |
4692 | I915_WAIT_INTERRUPTIBLE | | |
4693 | I915_WAIT_LOCKED); | |
cad9946c | 4694 | if (ret && ret != -EIO) |
c998e8a0 | 4695 | goto err_unlock; |
f7403347 | 4696 | |
3033acab | 4697 | assert_kernel_context_is_current(dev_priv); |
829a0af2 | 4698 | i915_gem_contexts_lost(dev_priv); |
45c5f202 CW |
4699 | mutex_unlock(&dev->struct_mutex); |
4700 | ||
63987bfe SAK |
4701 | intel_guc_suspend(dev_priv); |
4702 | ||
737b1506 | 4703 | cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work); |
67d97da3 | 4704 | cancel_delayed_work_sync(&dev_priv->gt.retire_work); |
bdeb9785 CW |
4705 | |
4706 | /* As the idle_work is rearming if it detects a race, play safe and | |
4707 | * repeat the flush until it is definitely idle. | |
4708 | */ | |
7c26240e | 4709 | drain_delayed_work(&dev_priv->gt.idle_work); |
bdeb9785 | 4710 | |
bdcf120b CW |
4711 | /* Assert that we sucessfully flushed all the work and |
4712 | * reset the GPU back to its idle, low power state. | |
4713 | */ | |
67d97da3 | 4714 | WARN_ON(dev_priv->gt.awake); |
fc692bd3 CW |
4715 | if (WARN_ON(!intel_engines_are_idle(dev_priv))) |
4716 | i915_gem_set_wedged(dev_priv); /* no hope, discard everything */ | |
bdcf120b | 4717 | |
1c777c5d ID |
4718 | /* |
4719 | * Neither the BIOS, ourselves or any other kernel | |
4720 | * expects the system to be in execlists mode on startup, | |
4721 | * so we need to reset the GPU back to legacy mode. And the only | |
4722 | * known way to disable logical contexts is through a GPU reset. | |
4723 | * | |
4724 | * So in order to leave the system in a known default configuration, | |
4725 | * always reset the GPU upon unload and suspend. Afterwards we then | |
4726 | * clean up the GEM state tracking, flushing off the requests and | |
4727 | * leaving the system in a known idle state. | |
4728 | * | |
4729 | * Note that is of the upmost importance that the GPU is idle and | |
4730 | * all stray writes are flushed *before* we dismantle the backing | |
4731 | * storage for the pinned objects. | |
4732 | * | |
4733 | * However, since we are uncertain that resetting the GPU on older | |
4734 | * machines is a good idea, we don't - just in case it leaves the | |
4735 | * machine in an unusable condition. | |
4736 | */ | |
24145517 | 4737 | i915_gem_sanitize(dev_priv); |
cad9946c CW |
4738 | |
4739 | intel_runtime_pm_put(dev_priv); | |
4740 | return 0; | |
1c777c5d | 4741 | |
c998e8a0 | 4742 | err_unlock: |
45c5f202 | 4743 | mutex_unlock(&dev->struct_mutex); |
c998e8a0 | 4744 | intel_runtime_pm_put(dev_priv); |
45c5f202 | 4745 | return ret; |
673a394b EA |
4746 | } |
4747 | ||
bf9e8429 | 4748 | void i915_gem_resume(struct drm_i915_private *dev_priv) |
5ab57c70 | 4749 | { |
bf9e8429 | 4750 | struct drm_device *dev = &dev_priv->drm; |
5ab57c70 | 4751 | |
31ab49ab ID |
4752 | WARN_ON(dev_priv->gt.awake); |
4753 | ||
5ab57c70 | 4754 | mutex_lock(&dev->struct_mutex); |
275a991c | 4755 | i915_gem_restore_gtt_mappings(dev_priv); |
269e6ea9 | 4756 | i915_gem_restore_fences(dev_priv); |
5ab57c70 CW |
4757 | |
4758 | /* As we didn't flush the kernel context before suspend, we cannot | |
4759 | * guarantee that the context image is complete. So let's just reset | |
4760 | * it and start again. | |
4761 | */ | |
821ed7df | 4762 | dev_priv->gt.resume(dev_priv); |
5ab57c70 CW |
4763 | |
4764 | mutex_unlock(&dev->struct_mutex); | |
4765 | } | |
4766 | ||
c6be607a | 4767 | void i915_gem_init_swizzling(struct drm_i915_private *dev_priv) |
f691e2f4 | 4768 | { |
c6be607a | 4769 | if (INTEL_GEN(dev_priv) < 5 || |
f691e2f4 DV |
4770 | dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE) |
4771 | return; | |
4772 | ||
4773 | I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) | | |
4774 | DISP_TILE_SURFACE_SWIZZLING); | |
4775 | ||
5db94019 | 4776 | if (IS_GEN5(dev_priv)) |
11782b02 DV |
4777 | return; |
4778 | ||
f691e2f4 | 4779 | I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL); |
5db94019 | 4780 | if (IS_GEN6(dev_priv)) |
6b26c86d | 4781 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB)); |
5db94019 | 4782 | else if (IS_GEN7(dev_priv)) |
6b26c86d | 4783 | I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB)); |
5db94019 | 4784 | else if (IS_GEN8(dev_priv)) |
31a5336e | 4785 | I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_BDW)); |
8782e26c BW |
4786 | else |
4787 | BUG(); | |
f691e2f4 | 4788 | } |
e21af88d | 4789 | |
50a0bc90 | 4790 | static void init_unused_ring(struct drm_i915_private *dev_priv, u32 base) |
81e7f200 | 4791 | { |
81e7f200 VS |
4792 | I915_WRITE(RING_CTL(base), 0); |
4793 | I915_WRITE(RING_HEAD(base), 0); | |
4794 | I915_WRITE(RING_TAIL(base), 0); | |
4795 | I915_WRITE(RING_START(base), 0); | |
4796 | } | |
4797 | ||
50a0bc90 | 4798 | static void init_unused_rings(struct drm_i915_private *dev_priv) |
81e7f200 | 4799 | { |
50a0bc90 TU |
4800 | if (IS_I830(dev_priv)) { |
4801 | init_unused_ring(dev_priv, PRB1_BASE); | |
4802 | init_unused_ring(dev_priv, SRB0_BASE); | |
4803 | init_unused_ring(dev_priv, SRB1_BASE); | |
4804 | init_unused_ring(dev_priv, SRB2_BASE); | |
4805 | init_unused_ring(dev_priv, SRB3_BASE); | |
4806 | } else if (IS_GEN2(dev_priv)) { | |
4807 | init_unused_ring(dev_priv, SRB0_BASE); | |
4808 | init_unused_ring(dev_priv, SRB1_BASE); | |
4809 | } else if (IS_GEN3(dev_priv)) { | |
4810 | init_unused_ring(dev_priv, PRB1_BASE); | |
4811 | init_unused_ring(dev_priv, PRB2_BASE); | |
81e7f200 VS |
4812 | } |
4813 | } | |
4814 | ||
20a8a74a | 4815 | static int __i915_gem_restart_engines(void *data) |
4fc7c971 | 4816 | { |
20a8a74a | 4817 | struct drm_i915_private *i915 = data; |
e2f80391 | 4818 | struct intel_engine_cs *engine; |
3b3f1650 | 4819 | enum intel_engine_id id; |
20a8a74a CW |
4820 | int err; |
4821 | ||
4822 | for_each_engine(engine, i915, id) { | |
4823 | err = engine->init_hw(engine); | |
4824 | if (err) | |
4825 | return err; | |
4826 | } | |
4827 | ||
4828 | return 0; | |
4829 | } | |
4830 | ||
4831 | int i915_gem_init_hw(struct drm_i915_private *dev_priv) | |
4832 | { | |
d200cda6 | 4833 | int ret; |
4fc7c971 | 4834 | |
de867c20 CW |
4835 | dev_priv->gt.last_init_time = ktime_get(); |
4836 | ||
5e4f5189 CW |
4837 | /* Double layer security blanket, see i915_gem_init() */ |
4838 | intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); | |
4839 | ||
0031fb96 | 4840 | if (HAS_EDRAM(dev_priv) && INTEL_GEN(dev_priv) < 9) |
05e21cc4 | 4841 | I915_WRITE(HSW_IDICR, I915_READ(HSW_IDICR) | IDIHASHMSK(0xf)); |
4fc7c971 | 4842 | |
772c2a51 | 4843 | if (IS_HASWELL(dev_priv)) |
50a0bc90 | 4844 | I915_WRITE(MI_PREDICATE_RESULT_2, IS_HSW_GT3(dev_priv) ? |
0bf21347 | 4845 | LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED); |
9435373e | 4846 | |
6e266956 | 4847 | if (HAS_PCH_NOP(dev_priv)) { |
fd6b8f43 | 4848 | if (IS_IVYBRIDGE(dev_priv)) { |
6ba844b0 DV |
4849 | u32 temp = I915_READ(GEN7_MSG_CTL); |
4850 | temp &= ~(WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK); | |
4851 | I915_WRITE(GEN7_MSG_CTL, temp); | |
c6be607a | 4852 | } else if (INTEL_GEN(dev_priv) >= 7) { |
6ba844b0 DV |
4853 | u32 temp = I915_READ(HSW_NDE_RSTWRN_OPT); |
4854 | temp &= ~RESET_PCH_HANDSHAKE_ENABLE; | |
4855 | I915_WRITE(HSW_NDE_RSTWRN_OPT, temp); | |
4856 | } | |
88a2b2a3 BW |
4857 | } |
4858 | ||
c6be607a | 4859 | i915_gem_init_swizzling(dev_priv); |
4fc7c971 | 4860 | |
d5abdfda DV |
4861 | /* |
4862 | * At least 830 can leave some of the unused rings | |
4863 | * "active" (ie. head != tail) after resume which | |
4864 | * will prevent c3 entry. Makes sure all unused rings | |
4865 | * are totally idle. | |
4866 | */ | |
50a0bc90 | 4867 | init_unused_rings(dev_priv); |
d5abdfda | 4868 | |
ed54c1a1 | 4869 | BUG_ON(!dev_priv->kernel_context); |
6f74b36b CW |
4870 | if (i915_terminally_wedged(&dev_priv->gpu_error)) { |
4871 | ret = -EIO; | |
4872 | goto out; | |
4873 | } | |
90638cc1 | 4874 | |
c6be607a | 4875 | ret = i915_ppgtt_init_hw(dev_priv); |
4ad2fd88 JH |
4876 | if (ret) { |
4877 | DRM_ERROR("PPGTT enable HW failed %d\n", ret); | |
4878 | goto out; | |
4879 | } | |
4880 | ||
4881 | /* Need to do basic initialisation of all rings first: */ | |
20a8a74a CW |
4882 | ret = __i915_gem_restart_engines(dev_priv); |
4883 | if (ret) | |
4884 | goto out; | |
99433931 | 4885 | |
bf9e8429 | 4886 | intel_mocs_init_l3cc_table(dev_priv); |
0ccdacf6 | 4887 | |
b8991403 OM |
4888 | /* We can't enable contexts until all firmware is loaded */ |
4889 | ret = intel_uc_init_hw(dev_priv); | |
4890 | if (ret) | |
4891 | goto out; | |
33a732f4 | 4892 | |
5e4f5189 CW |
4893 | out: |
4894 | intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); | |
2fa48d8d | 4895 | return ret; |
8187a2b7 ZN |
4896 | } |
4897 | ||
39df9190 CW |
4898 | bool intel_sanitize_semaphores(struct drm_i915_private *dev_priv, int value) |
4899 | { | |
4900 | if (INTEL_INFO(dev_priv)->gen < 6) | |
4901 | return false; | |
4902 | ||
4903 | /* TODO: make semaphores and Execlists play nicely together */ | |
4f044a88 | 4904 | if (i915_modparams.enable_execlists) |
39df9190 CW |
4905 | return false; |
4906 | ||
4907 | if (value >= 0) | |
4908 | return value; | |
4909 | ||
39df9190 | 4910 | /* Enable semaphores on SNB when IO remapping is off */ |
80debff8 | 4911 | if (IS_GEN6(dev_priv) && intel_vtd_active()) |
39df9190 | 4912 | return false; |
39df9190 CW |
4913 | |
4914 | return true; | |
4915 | } | |
4916 | ||
bf9e8429 | 4917 | int i915_gem_init(struct drm_i915_private *dev_priv) |
1070a42b | 4918 | { |
1070a42b CW |
4919 | int ret; |
4920 | ||
bf9e8429 | 4921 | mutex_lock(&dev_priv->drm.struct_mutex); |
d62b4892 | 4922 | |
da9fe3f3 MA |
4923 | /* |
4924 | * We need to fallback to 4K pages since gvt gtt handling doesn't | |
4925 | * support huge page entries - we will need to check either hypervisor | |
4926 | * mm can support huge guest page or just do emulation in gvt. | |
4927 | */ | |
4928 | if (intel_vgpu_active(dev_priv)) | |
4929 | mkwrite_device_info(dev_priv)->page_sizes = | |
4930 | I915_GTT_PAGE_SIZE_4K; | |
4931 | ||
94312828 | 4932 | dev_priv->mm.unordered_timeline = dma_fence_context_alloc(1); |
57822dc6 | 4933 | |
4f044a88 | 4934 | if (!i915_modparams.enable_execlists) { |
821ed7df | 4935 | dev_priv->gt.resume = intel_legacy_submission_resume; |
7e37f889 | 4936 | dev_priv->gt.cleanup_engine = intel_engine_cleanup; |
454afebd | 4937 | } else { |
821ed7df | 4938 | dev_priv->gt.resume = intel_lr_context_resume; |
117897f4 | 4939 | dev_priv->gt.cleanup_engine = intel_logical_ring_cleanup; |
a83014d3 OM |
4940 | } |
4941 | ||
5e4f5189 CW |
4942 | /* This is just a security blanket to placate dragons. |
4943 | * On some systems, we very sporadically observe that the first TLBs | |
4944 | * used by the CS may be stale, despite us poking the TLB reset. If | |
4945 | * we hold the forcewake during initialisation these problems | |
4946 | * just magically go away. | |
4947 | */ | |
4948 | intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); | |
4949 | ||
8a2421bd CW |
4950 | ret = i915_gem_init_userptr(dev_priv); |
4951 | if (ret) | |
4952 | goto out_unlock; | |
f6b9d5ca CW |
4953 | |
4954 | ret = i915_gem_init_ggtt(dev_priv); | |
4955 | if (ret) | |
4956 | goto out_unlock; | |
d62b4892 | 4957 | |
829a0af2 | 4958 | ret = i915_gem_contexts_init(dev_priv); |
7bcc3777 JN |
4959 | if (ret) |
4960 | goto out_unlock; | |
2fa48d8d | 4961 | |
bf9e8429 | 4962 | ret = intel_engines_init(dev_priv); |
35a57ffb | 4963 | if (ret) |
7bcc3777 | 4964 | goto out_unlock; |
2fa48d8d | 4965 | |
bf9e8429 | 4966 | ret = i915_gem_init_hw(dev_priv); |
60990320 | 4967 | if (ret == -EIO) { |
7e21d648 | 4968 | /* Allow engine initialisation to fail by marking the GPU as |
60990320 CW |
4969 | * wedged. But we only want to do this where the GPU is angry, |
4970 | * for all other failure, such as an allocation failure, bail. | |
4971 | */ | |
6f74b36b CW |
4972 | if (!i915_terminally_wedged(&dev_priv->gpu_error)) { |
4973 | DRM_ERROR("Failed to initialize GPU, declaring it wedged\n"); | |
4974 | i915_gem_set_wedged(dev_priv); | |
4975 | } | |
60990320 | 4976 | ret = 0; |
1070a42b | 4977 | } |
7bcc3777 JN |
4978 | |
4979 | out_unlock: | |
5e4f5189 | 4980 | intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); |
bf9e8429 | 4981 | mutex_unlock(&dev_priv->drm.struct_mutex); |
1070a42b | 4982 | |
60990320 | 4983 | return ret; |
1070a42b CW |
4984 | } |
4985 | ||
24145517 CW |
4986 | void i915_gem_init_mmio(struct drm_i915_private *i915) |
4987 | { | |
4988 | i915_gem_sanitize(i915); | |
4989 | } | |
4990 | ||
8187a2b7 | 4991 | void |
cb15d9f8 | 4992 | i915_gem_cleanup_engines(struct drm_i915_private *dev_priv) |
8187a2b7 | 4993 | { |
e2f80391 | 4994 | struct intel_engine_cs *engine; |
3b3f1650 | 4995 | enum intel_engine_id id; |
8187a2b7 | 4996 | |
3b3f1650 | 4997 | for_each_engine(engine, dev_priv, id) |
117897f4 | 4998 | dev_priv->gt.cleanup_engine(engine); |
8187a2b7 ZN |
4999 | } |
5000 | ||
40ae4e16 ID |
5001 | void |
5002 | i915_gem_load_init_fences(struct drm_i915_private *dev_priv) | |
5003 | { | |
49ef5294 | 5004 | int i; |
40ae4e16 ID |
5005 | |
5006 | if (INTEL_INFO(dev_priv)->gen >= 7 && !IS_VALLEYVIEW(dev_priv) && | |
5007 | !IS_CHERRYVIEW(dev_priv)) | |
5008 | dev_priv->num_fence_regs = 32; | |
73f67aa8 JN |
5009 | else if (INTEL_INFO(dev_priv)->gen >= 4 || |
5010 | IS_I945G(dev_priv) || IS_I945GM(dev_priv) || | |
5011 | IS_G33(dev_priv) || IS_PINEVIEW(dev_priv)) | |
40ae4e16 ID |
5012 | dev_priv->num_fence_regs = 16; |
5013 | else | |
5014 | dev_priv->num_fence_regs = 8; | |
5015 | ||
c033666a | 5016 | if (intel_vgpu_active(dev_priv)) |
40ae4e16 ID |
5017 | dev_priv->num_fence_regs = |
5018 | I915_READ(vgtif_reg(avail_rs.fence_num)); | |
5019 | ||
5020 | /* Initialize fence registers to zero */ | |
49ef5294 CW |
5021 | for (i = 0; i < dev_priv->num_fence_regs; i++) { |
5022 | struct drm_i915_fence_reg *fence = &dev_priv->fence_regs[i]; | |
5023 | ||
5024 | fence->i915 = dev_priv; | |
5025 | fence->id = i; | |
5026 | list_add_tail(&fence->link, &dev_priv->mm.fence_list); | |
5027 | } | |
4362f4f6 | 5028 | i915_gem_restore_fences(dev_priv); |
40ae4e16 | 5029 | |
4362f4f6 | 5030 | i915_gem_detect_bit_6_swizzle(dev_priv); |
40ae4e16 ID |
5031 | } |
5032 | ||
73cb9701 | 5033 | int |
cb15d9f8 | 5034 | i915_gem_load_init(struct drm_i915_private *dev_priv) |
673a394b | 5035 | { |
a933568e | 5036 | int err = -ENOMEM; |
42dcedd4 | 5037 | |
a933568e TU |
5038 | dev_priv->objects = KMEM_CACHE(drm_i915_gem_object, SLAB_HWCACHE_ALIGN); |
5039 | if (!dev_priv->objects) | |
73cb9701 | 5040 | goto err_out; |
73cb9701 | 5041 | |
a933568e TU |
5042 | dev_priv->vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN); |
5043 | if (!dev_priv->vmas) | |
73cb9701 | 5044 | goto err_objects; |
73cb9701 | 5045 | |
d1b48c1e CW |
5046 | dev_priv->luts = KMEM_CACHE(i915_lut_handle, 0); |
5047 | if (!dev_priv->luts) | |
5048 | goto err_vmas; | |
5049 | ||
a933568e TU |
5050 | dev_priv->requests = KMEM_CACHE(drm_i915_gem_request, |
5051 | SLAB_HWCACHE_ALIGN | | |
5052 | SLAB_RECLAIM_ACCOUNT | | |
5f0d5a3a | 5053 | SLAB_TYPESAFE_BY_RCU); |
a933568e | 5054 | if (!dev_priv->requests) |
d1b48c1e | 5055 | goto err_luts; |
73cb9701 | 5056 | |
52e54209 CW |
5057 | dev_priv->dependencies = KMEM_CACHE(i915_dependency, |
5058 | SLAB_HWCACHE_ALIGN | | |
5059 | SLAB_RECLAIM_ACCOUNT); | |
5060 | if (!dev_priv->dependencies) | |
5061 | goto err_requests; | |
5062 | ||
c5cf9a91 CW |
5063 | dev_priv->priorities = KMEM_CACHE(i915_priolist, SLAB_HWCACHE_ALIGN); |
5064 | if (!dev_priv->priorities) | |
5065 | goto err_dependencies; | |
5066 | ||
73cb9701 CW |
5067 | mutex_lock(&dev_priv->drm.struct_mutex); |
5068 | INIT_LIST_HEAD(&dev_priv->gt.timelines); | |
bb89485e | 5069 | err = i915_gem_timeline_init__global(dev_priv); |
73cb9701 CW |
5070 | mutex_unlock(&dev_priv->drm.struct_mutex); |
5071 | if (err) | |
c5cf9a91 | 5072 | goto err_priorities; |
673a394b | 5073 | |
fbbd37b3 | 5074 | INIT_WORK(&dev_priv->mm.free_work, __i915_gem_free_work); |
f2123818 CW |
5075 | |
5076 | spin_lock_init(&dev_priv->mm.obj_lock); | |
87701b4b | 5077 | spin_lock_init(&dev_priv->mm.free_lock); |
fbbd37b3 | 5078 | init_llist_head(&dev_priv->mm.free_list); |
6c085a72 CW |
5079 | INIT_LIST_HEAD(&dev_priv->mm.unbound_list); |
5080 | INIT_LIST_HEAD(&dev_priv->mm.bound_list); | |
a09ba7fa | 5081 | INIT_LIST_HEAD(&dev_priv->mm.fence_list); |
275f039d | 5082 | INIT_LIST_HEAD(&dev_priv->mm.userfault_list); |
f2123818 | 5083 | |
67d97da3 | 5084 | INIT_DELAYED_WORK(&dev_priv->gt.retire_work, |
673a394b | 5085 | i915_gem_retire_work_handler); |
67d97da3 | 5086 | INIT_DELAYED_WORK(&dev_priv->gt.idle_work, |
b29c19b6 | 5087 | i915_gem_idle_work_handler); |
1f15b76f | 5088 | init_waitqueue_head(&dev_priv->gpu_error.wait_queue); |
1f83fee0 | 5089 | init_waitqueue_head(&dev_priv->gpu_error.reset_queue); |
31169714 | 5090 | |
6f633402 JL |
5091 | atomic_set(&dev_priv->mm.bsd_engine_dispatch_index, 0); |
5092 | ||
b5add959 | 5093 | spin_lock_init(&dev_priv->fb_tracking.lock); |
73cb9701 | 5094 | |
465c403c MA |
5095 | err = i915_gemfs_init(dev_priv); |
5096 | if (err) | |
5097 | DRM_NOTE("Unable to create a private tmpfs mount, hugepage support will be disabled(%d).\n", err); | |
5098 | ||
73cb9701 CW |
5099 | return 0; |
5100 | ||
c5cf9a91 CW |
5101 | err_priorities: |
5102 | kmem_cache_destroy(dev_priv->priorities); | |
52e54209 CW |
5103 | err_dependencies: |
5104 | kmem_cache_destroy(dev_priv->dependencies); | |
73cb9701 CW |
5105 | err_requests: |
5106 | kmem_cache_destroy(dev_priv->requests); | |
d1b48c1e CW |
5107 | err_luts: |
5108 | kmem_cache_destroy(dev_priv->luts); | |
73cb9701 CW |
5109 | err_vmas: |
5110 | kmem_cache_destroy(dev_priv->vmas); | |
5111 | err_objects: | |
5112 | kmem_cache_destroy(dev_priv->objects); | |
5113 | err_out: | |
5114 | return err; | |
673a394b | 5115 | } |
71acb5eb | 5116 | |
cb15d9f8 | 5117 | void i915_gem_load_cleanup(struct drm_i915_private *dev_priv) |
d64aa096 | 5118 | { |
c4d4c1c6 | 5119 | i915_gem_drain_freed_objects(dev_priv); |
7d5d59e5 | 5120 | WARN_ON(!llist_empty(&dev_priv->mm.free_list)); |
c4d4c1c6 | 5121 | WARN_ON(dev_priv->mm.object_count); |
7d5d59e5 | 5122 | |
ea84aa77 MA |
5123 | mutex_lock(&dev_priv->drm.struct_mutex); |
5124 | i915_gem_timeline_fini(&dev_priv->gt.global_timeline); | |
5125 | WARN_ON(!list_empty(&dev_priv->gt.timelines)); | |
5126 | mutex_unlock(&dev_priv->drm.struct_mutex); | |
5127 | ||
c5cf9a91 | 5128 | kmem_cache_destroy(dev_priv->priorities); |
52e54209 | 5129 | kmem_cache_destroy(dev_priv->dependencies); |
d64aa096 | 5130 | kmem_cache_destroy(dev_priv->requests); |
d1b48c1e | 5131 | kmem_cache_destroy(dev_priv->luts); |
d64aa096 ID |
5132 | kmem_cache_destroy(dev_priv->vmas); |
5133 | kmem_cache_destroy(dev_priv->objects); | |
0eafec6d CW |
5134 | |
5135 | /* And ensure that our DESTROY_BY_RCU slabs are truly destroyed */ | |
5136 | rcu_barrier(); | |
465c403c MA |
5137 | |
5138 | i915_gemfs_fini(dev_priv); | |
d64aa096 ID |
5139 | } |
5140 | ||
6a800eab CW |
5141 | int i915_gem_freeze(struct drm_i915_private *dev_priv) |
5142 | { | |
d0aa301a CW |
5143 | /* Discard all purgeable objects, let userspace recover those as |
5144 | * required after resuming. | |
5145 | */ | |
6a800eab | 5146 | i915_gem_shrink_all(dev_priv); |
6a800eab | 5147 | |
6a800eab CW |
5148 | return 0; |
5149 | } | |
5150 | ||
461fb99c CW |
5151 | int i915_gem_freeze_late(struct drm_i915_private *dev_priv) |
5152 | { | |
5153 | struct drm_i915_gem_object *obj; | |
7aab2d53 CW |
5154 | struct list_head *phases[] = { |
5155 | &dev_priv->mm.unbound_list, | |
5156 | &dev_priv->mm.bound_list, | |
5157 | NULL | |
5158 | }, **p; | |
461fb99c CW |
5159 | |
5160 | /* Called just before we write the hibernation image. | |
5161 | * | |
5162 | * We need to update the domain tracking to reflect that the CPU | |
5163 | * will be accessing all the pages to create and restore from the | |
5164 | * hibernation, and so upon restoration those pages will be in the | |
5165 | * CPU domain. | |
5166 | * | |
5167 | * To make sure the hibernation image contains the latest state, | |
5168 | * we update that state just before writing out the image. | |
7aab2d53 CW |
5169 | * |
5170 | * To try and reduce the hibernation image, we manually shrink | |
d0aa301a | 5171 | * the objects as well, see i915_gem_freeze() |
461fb99c CW |
5172 | */ |
5173 | ||
912d572d | 5174 | i915_gem_shrink(dev_priv, -1UL, NULL, I915_SHRINK_UNBOUND); |
17b93c40 | 5175 | i915_gem_drain_freed_objects(dev_priv); |
461fb99c | 5176 | |
f2123818 | 5177 | spin_lock(&dev_priv->mm.obj_lock); |
7aab2d53 | 5178 | for (p = phases; *p; p++) { |
f2123818 | 5179 | list_for_each_entry(obj, *p, mm.link) |
e27ab73d | 5180 | __start_cpu_write(obj); |
461fb99c | 5181 | } |
f2123818 | 5182 | spin_unlock(&dev_priv->mm.obj_lock); |
461fb99c CW |
5183 | |
5184 | return 0; | |
5185 | } | |
5186 | ||
f787a5f5 | 5187 | void i915_gem_release(struct drm_device *dev, struct drm_file *file) |
b962442e | 5188 | { |
f787a5f5 | 5189 | struct drm_i915_file_private *file_priv = file->driver_priv; |
15f7bbc7 | 5190 | struct drm_i915_gem_request *request; |
b962442e EA |
5191 | |
5192 | /* Clean up our request list when the client is going away, so that | |
5193 | * later retire_requests won't dereference our soon-to-be-gone | |
5194 | * file_priv. | |
5195 | */ | |
1c25595f | 5196 | spin_lock(&file_priv->mm.lock); |
c8659efa | 5197 | list_for_each_entry(request, &file_priv->mm.request_list, client_link) |
f787a5f5 | 5198 | request->file_priv = NULL; |
1c25595f | 5199 | spin_unlock(&file_priv->mm.lock); |
b29c19b6 CW |
5200 | } |
5201 | ||
829a0af2 | 5202 | int i915_gem_open(struct drm_i915_private *i915, struct drm_file *file) |
b29c19b6 CW |
5203 | { |
5204 | struct drm_i915_file_private *file_priv; | |
e422b888 | 5205 | int ret; |
b29c19b6 | 5206 | |
c4c29d7b | 5207 | DRM_DEBUG("\n"); |
b29c19b6 CW |
5208 | |
5209 | file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); | |
5210 | if (!file_priv) | |
5211 | return -ENOMEM; | |
5212 | ||
5213 | file->driver_priv = file_priv; | |
829a0af2 | 5214 | file_priv->dev_priv = i915; |
ab0e7ff9 | 5215 | file_priv->file = file; |
b29c19b6 CW |
5216 | |
5217 | spin_lock_init(&file_priv->mm.lock); | |
5218 | INIT_LIST_HEAD(&file_priv->mm.request_list); | |
b29c19b6 | 5219 | |
c80ff16e | 5220 | file_priv->bsd_engine = -1; |
de1add36 | 5221 | |
829a0af2 | 5222 | ret = i915_gem_context_open(i915, file); |
e422b888 BW |
5223 | if (ret) |
5224 | kfree(file_priv); | |
b29c19b6 | 5225 | |
e422b888 | 5226 | return ret; |
b29c19b6 CW |
5227 | } |
5228 | ||
b680c37a DV |
5229 | /** |
5230 | * i915_gem_track_fb - update frontbuffer tracking | |
d9072a3e GT |
5231 | * @old: current GEM buffer for the frontbuffer slots |
5232 | * @new: new GEM buffer for the frontbuffer slots | |
5233 | * @frontbuffer_bits: bitmask of frontbuffer slots | |
b680c37a DV |
5234 | * |
5235 | * This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them | |
5236 | * from @old and setting them in @new. Both @old and @new can be NULL. | |
5237 | */ | |
a071fa00 DV |
5238 | void i915_gem_track_fb(struct drm_i915_gem_object *old, |
5239 | struct drm_i915_gem_object *new, | |
5240 | unsigned frontbuffer_bits) | |
5241 | { | |
faf5bf0a CW |
5242 | /* Control of individual bits within the mask are guarded by |
5243 | * the owning plane->mutex, i.e. we can never see concurrent | |
5244 | * manipulation of individual bits. But since the bitfield as a whole | |
5245 | * is updated using RMW, we need to use atomics in order to update | |
5246 | * the bits. | |
5247 | */ | |
5248 | BUILD_BUG_ON(INTEL_FRONTBUFFER_BITS_PER_PIPE * I915_MAX_PIPES > | |
5249 | sizeof(atomic_t) * BITS_PER_BYTE); | |
5250 | ||
a071fa00 | 5251 | if (old) { |
faf5bf0a CW |
5252 | WARN_ON(!(atomic_read(&old->frontbuffer_bits) & frontbuffer_bits)); |
5253 | atomic_andnot(frontbuffer_bits, &old->frontbuffer_bits); | |
a071fa00 DV |
5254 | } |
5255 | ||
5256 | if (new) { | |
faf5bf0a CW |
5257 | WARN_ON(atomic_read(&new->frontbuffer_bits) & frontbuffer_bits); |
5258 | atomic_or(frontbuffer_bits, &new->frontbuffer_bits); | |
a071fa00 DV |
5259 | } |
5260 | } | |
5261 | ||
ea70299d DG |
5262 | /* Allocate a new GEM object and fill it with the supplied data */ |
5263 | struct drm_i915_gem_object * | |
12d79d78 | 5264 | i915_gem_object_create_from_data(struct drm_i915_private *dev_priv, |
ea70299d DG |
5265 | const void *data, size_t size) |
5266 | { | |
5267 | struct drm_i915_gem_object *obj; | |
be062fa4 CW |
5268 | struct file *file; |
5269 | size_t offset; | |
5270 | int err; | |
ea70299d | 5271 | |
12d79d78 | 5272 | obj = i915_gem_object_create(dev_priv, round_up(size, PAGE_SIZE)); |
fe3db79b | 5273 | if (IS_ERR(obj)) |
ea70299d DG |
5274 | return obj; |
5275 | ||
ce8ff099 | 5276 | GEM_BUG_ON(obj->base.write_domain != I915_GEM_DOMAIN_CPU); |
ea70299d | 5277 | |
be062fa4 CW |
5278 | file = obj->base.filp; |
5279 | offset = 0; | |
5280 | do { | |
5281 | unsigned int len = min_t(typeof(size), size, PAGE_SIZE); | |
5282 | struct page *page; | |
5283 | void *pgdata, *vaddr; | |
ea70299d | 5284 | |
be062fa4 CW |
5285 | err = pagecache_write_begin(file, file->f_mapping, |
5286 | offset, len, 0, | |
5287 | &page, &pgdata); | |
5288 | if (err < 0) | |
5289 | goto fail; | |
ea70299d | 5290 | |
be062fa4 CW |
5291 | vaddr = kmap(page); |
5292 | memcpy(vaddr, data, len); | |
5293 | kunmap(page); | |
5294 | ||
5295 | err = pagecache_write_end(file, file->f_mapping, | |
5296 | offset, len, len, | |
5297 | page, pgdata); | |
5298 | if (err < 0) | |
5299 | goto fail; | |
5300 | ||
5301 | size -= len; | |
5302 | data += len; | |
5303 | offset += len; | |
5304 | } while (size); | |
ea70299d DG |
5305 | |
5306 | return obj; | |
5307 | ||
5308 | fail: | |
f8c417cd | 5309 | i915_gem_object_put(obj); |
be062fa4 | 5310 | return ERR_PTR(err); |
ea70299d | 5311 | } |
96d77634 CW |
5312 | |
5313 | struct scatterlist * | |
5314 | i915_gem_object_get_sg(struct drm_i915_gem_object *obj, | |
5315 | unsigned int n, | |
5316 | unsigned int *offset) | |
5317 | { | |
a4f5ea64 | 5318 | struct i915_gem_object_page_iter *iter = &obj->mm.get_page; |
96d77634 CW |
5319 | struct scatterlist *sg; |
5320 | unsigned int idx, count; | |
5321 | ||
5322 | might_sleep(); | |
5323 | GEM_BUG_ON(n >= obj->base.size >> PAGE_SHIFT); | |
a4f5ea64 | 5324 | GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj)); |
96d77634 CW |
5325 | |
5326 | /* As we iterate forward through the sg, we record each entry in a | |
5327 | * radixtree for quick repeated (backwards) lookups. If we have seen | |
5328 | * this index previously, we will have an entry for it. | |
5329 | * | |
5330 | * Initial lookup is O(N), but this is amortized to O(1) for | |
5331 | * sequential page access (where each new request is consecutive | |
5332 | * to the previous one). Repeated lookups are O(lg(obj->base.size)), | |
5333 | * i.e. O(1) with a large constant! | |
5334 | */ | |
5335 | if (n < READ_ONCE(iter->sg_idx)) | |
5336 | goto lookup; | |
5337 | ||
5338 | mutex_lock(&iter->lock); | |
5339 | ||
5340 | /* We prefer to reuse the last sg so that repeated lookup of this | |
5341 | * (or the subsequent) sg are fast - comparing against the last | |
5342 | * sg is faster than going through the radixtree. | |
5343 | */ | |
5344 | ||
5345 | sg = iter->sg_pos; | |
5346 | idx = iter->sg_idx; | |
5347 | count = __sg_page_count(sg); | |
5348 | ||
5349 | while (idx + count <= n) { | |
5350 | unsigned long exception, i; | |
5351 | int ret; | |
5352 | ||
5353 | /* If we cannot allocate and insert this entry, or the | |
5354 | * individual pages from this range, cancel updating the | |
5355 | * sg_idx so that on this lookup we are forced to linearly | |
5356 | * scan onwards, but on future lookups we will try the | |
5357 | * insertion again (in which case we need to be careful of | |
5358 | * the error return reporting that we have already inserted | |
5359 | * this index). | |
5360 | */ | |
5361 | ret = radix_tree_insert(&iter->radix, idx, sg); | |
5362 | if (ret && ret != -EEXIST) | |
5363 | goto scan; | |
5364 | ||
5365 | exception = | |
5366 | RADIX_TREE_EXCEPTIONAL_ENTRY | | |
5367 | idx << RADIX_TREE_EXCEPTIONAL_SHIFT; | |
5368 | for (i = 1; i < count; i++) { | |
5369 | ret = radix_tree_insert(&iter->radix, idx + i, | |
5370 | (void *)exception); | |
5371 | if (ret && ret != -EEXIST) | |
5372 | goto scan; | |
5373 | } | |
5374 | ||
5375 | idx += count; | |
5376 | sg = ____sg_next(sg); | |
5377 | count = __sg_page_count(sg); | |
5378 | } | |
5379 | ||
5380 | scan: | |
5381 | iter->sg_pos = sg; | |
5382 | iter->sg_idx = idx; | |
5383 | ||
5384 | mutex_unlock(&iter->lock); | |
5385 | ||
5386 | if (unlikely(n < idx)) /* insertion completed by another thread */ | |
5387 | goto lookup; | |
5388 | ||
5389 | /* In case we failed to insert the entry into the radixtree, we need | |
5390 | * to look beyond the current sg. | |
5391 | */ | |
5392 | while (idx + count <= n) { | |
5393 | idx += count; | |
5394 | sg = ____sg_next(sg); | |
5395 | count = __sg_page_count(sg); | |
5396 | } | |
5397 | ||
5398 | *offset = n - idx; | |
5399 | return sg; | |
5400 | ||
5401 | lookup: | |
5402 | rcu_read_lock(); | |
5403 | ||
5404 | sg = radix_tree_lookup(&iter->radix, n); | |
5405 | GEM_BUG_ON(!sg); | |
5406 | ||
5407 | /* If this index is in the middle of multi-page sg entry, | |
5408 | * the radixtree will contain an exceptional entry that points | |
5409 | * to the start of that range. We will return the pointer to | |
5410 | * the base page and the offset of this page within the | |
5411 | * sg entry's range. | |
5412 | */ | |
5413 | *offset = 0; | |
5414 | if (unlikely(radix_tree_exception(sg))) { | |
5415 | unsigned long base = | |
5416 | (unsigned long)sg >> RADIX_TREE_EXCEPTIONAL_SHIFT; | |
5417 | ||
5418 | sg = radix_tree_lookup(&iter->radix, base); | |
5419 | GEM_BUG_ON(!sg); | |
5420 | ||
5421 | *offset = n - base; | |
5422 | } | |
5423 | ||
5424 | rcu_read_unlock(); | |
5425 | ||
5426 | return sg; | |
5427 | } | |
5428 | ||
5429 | struct page * | |
5430 | i915_gem_object_get_page(struct drm_i915_gem_object *obj, unsigned int n) | |
5431 | { | |
5432 | struct scatterlist *sg; | |
5433 | unsigned int offset; | |
5434 | ||
5435 | GEM_BUG_ON(!i915_gem_object_has_struct_page(obj)); | |
5436 | ||
5437 | sg = i915_gem_object_get_sg(obj, n, &offset); | |
5438 | return nth_page(sg_page(sg), offset); | |
5439 | } | |
5440 | ||
5441 | /* Like i915_gem_object_get_page(), but mark the returned page dirty */ | |
5442 | struct page * | |
5443 | i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj, | |
5444 | unsigned int n) | |
5445 | { | |
5446 | struct page *page; | |
5447 | ||
5448 | page = i915_gem_object_get_page(obj, n); | |
a4f5ea64 | 5449 | if (!obj->mm.dirty) |
96d77634 CW |
5450 | set_page_dirty(page); |
5451 | ||
5452 | return page; | |
5453 | } | |
5454 | ||
5455 | dma_addr_t | |
5456 | i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj, | |
5457 | unsigned long n) | |
5458 | { | |
5459 | struct scatterlist *sg; | |
5460 | unsigned int offset; | |
5461 | ||
5462 | sg = i915_gem_object_get_sg(obj, n, &offset); | |
5463 | return sg_dma_address(sg) + (offset << PAGE_SHIFT); | |
5464 | } | |
935a2f77 | 5465 | |
8eeb7906 CW |
5466 | int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj, int align) |
5467 | { | |
5468 | struct sg_table *pages; | |
5469 | int err; | |
5470 | ||
5471 | if (align > obj->base.size) | |
5472 | return -EINVAL; | |
5473 | ||
5474 | if (obj->ops == &i915_gem_phys_ops) | |
5475 | return 0; | |
5476 | ||
5477 | if (obj->ops != &i915_gem_object_ops) | |
5478 | return -EINVAL; | |
5479 | ||
5480 | err = i915_gem_object_unbind(obj); | |
5481 | if (err) | |
5482 | return err; | |
5483 | ||
5484 | mutex_lock(&obj->mm.lock); | |
5485 | ||
5486 | if (obj->mm.madv != I915_MADV_WILLNEED) { | |
5487 | err = -EFAULT; | |
5488 | goto err_unlock; | |
5489 | } | |
5490 | ||
5491 | if (obj->mm.quirked) { | |
5492 | err = -EFAULT; | |
5493 | goto err_unlock; | |
5494 | } | |
5495 | ||
5496 | if (obj->mm.mapping) { | |
5497 | err = -EBUSY; | |
5498 | goto err_unlock; | |
5499 | } | |
5500 | ||
f2123818 CW |
5501 | pages = fetch_and_zero(&obj->mm.pages); |
5502 | if (pages) { | |
5503 | struct drm_i915_private *i915 = to_i915(obj->base.dev); | |
5504 | ||
5505 | __i915_gem_object_reset_page_iter(obj); | |
5506 | ||
5507 | spin_lock(&i915->mm.obj_lock); | |
5508 | list_del(&obj->mm.link); | |
5509 | spin_unlock(&i915->mm.obj_lock); | |
5510 | } | |
5511 | ||
8eeb7906 CW |
5512 | obj->ops = &i915_gem_phys_ops; |
5513 | ||
8fb6a5df | 5514 | err = ____i915_gem_object_get_pages(obj); |
8eeb7906 CW |
5515 | if (err) |
5516 | goto err_xfer; | |
5517 | ||
5518 | /* Perma-pin (until release) the physical set of pages */ | |
5519 | __i915_gem_object_pin_pages(obj); | |
5520 | ||
5521 | if (!IS_ERR_OR_NULL(pages)) | |
5522 | i915_gem_object_ops.put_pages(obj, pages); | |
5523 | mutex_unlock(&obj->mm.lock); | |
5524 | return 0; | |
5525 | ||
5526 | err_xfer: | |
5527 | obj->ops = &i915_gem_object_ops; | |
5528 | obj->mm.pages = pages; | |
5529 | err_unlock: | |
5530 | mutex_unlock(&obj->mm.lock); | |
5531 | return err; | |
5532 | } | |
5533 | ||
935a2f77 CW |
5534 | #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) |
5535 | #include "selftests/scatterlist.c" | |
66d9cb5d | 5536 | #include "selftests/mock_gem_device.c" |
44653988 | 5537 | #include "selftests/huge_gem_object.c" |
4049866f | 5538 | #include "selftests/huge_pages.c" |
8335fd65 | 5539 | #include "selftests/i915_gem_object.c" |
17059450 | 5540 | #include "selftests/i915_gem_coherency.c" |
935a2f77 | 5541 | #endif |