Commit | Line | Data |
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a8c21a54 T |
1 | /* |
2 | * Copyright (C) 2015 Etnaviv Project | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License version 2 as published by | |
6 | * the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | */ | |
16 | ||
17 | #include <linux/spinlock.h> | |
18 | #include <linux/shmem_fs.h> | |
19 | ||
20 | #include "etnaviv_drv.h" | |
21 | #include "etnaviv_gem.h" | |
22 | #include "etnaviv_gpu.h" | |
23 | #include "etnaviv_mmu.h" | |
24 | ||
25 | static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj) | |
26 | { | |
27 | struct drm_device *dev = etnaviv_obj->base.dev; | |
28 | struct sg_table *sgt = etnaviv_obj->sgt; | |
29 | ||
30 | /* | |
31 | * For non-cached buffers, ensure the new pages are clean | |
32 | * because display controller, GPU, etc. are not coherent. | |
33 | */ | |
34 | if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) | |
35 | dma_map_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL); | |
36 | } | |
37 | ||
38 | static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj) | |
39 | { | |
40 | struct drm_device *dev = etnaviv_obj->base.dev; | |
41 | struct sg_table *sgt = etnaviv_obj->sgt; | |
42 | ||
43 | /* | |
44 | * For non-cached buffers, ensure the new pages are clean | |
45 | * because display controller, GPU, etc. are not coherent: | |
46 | * | |
47 | * WARNING: The DMA API does not support concurrent CPU | |
48 | * and device access to the memory area. With BIDIRECTIONAL, | |
49 | * we will clean the cache lines which overlap the region, | |
50 | * and invalidate all cache lines (partially) contained in | |
51 | * the region. | |
52 | * | |
53 | * If you have dirty data in the overlapping cache lines, | |
54 | * that will corrupt the GPU-written data. If you have | |
55 | * written into the remainder of the region, this can | |
56 | * discard those writes. | |
57 | */ | |
58 | if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) | |
59 | dma_unmap_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL); | |
60 | } | |
61 | ||
62 | /* called with etnaviv_obj->lock held */ | |
63 | static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
64 | { | |
65 | struct drm_device *dev = etnaviv_obj->base.dev; | |
66 | struct page **p = drm_gem_get_pages(&etnaviv_obj->base); | |
67 | ||
68 | if (IS_ERR(p)) { | |
69 | dev_err(dev->dev, "could not get pages: %ld\n", PTR_ERR(p)); | |
70 | return PTR_ERR(p); | |
71 | } | |
72 | ||
73 | etnaviv_obj->pages = p; | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
78 | static void put_pages(struct etnaviv_gem_object *etnaviv_obj) | |
79 | { | |
80 | if (etnaviv_obj->sgt) { | |
81 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
82 | sg_free_table(etnaviv_obj->sgt); | |
83 | kfree(etnaviv_obj->sgt); | |
84 | etnaviv_obj->sgt = NULL; | |
85 | } | |
86 | if (etnaviv_obj->pages) { | |
87 | drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages, | |
88 | true, false); | |
89 | ||
90 | etnaviv_obj->pages = NULL; | |
91 | } | |
92 | } | |
93 | ||
94 | struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
95 | { | |
96 | int ret; | |
97 | ||
98 | lockdep_assert_held(&etnaviv_obj->lock); | |
99 | ||
100 | if (!etnaviv_obj->pages) { | |
101 | ret = etnaviv_obj->ops->get_pages(etnaviv_obj); | |
102 | if (ret < 0) | |
103 | return ERR_PTR(ret); | |
104 | } | |
105 | ||
106 | if (!etnaviv_obj->sgt) { | |
107 | struct drm_device *dev = etnaviv_obj->base.dev; | |
108 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
109 | struct sg_table *sgt; | |
110 | ||
111 | sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages); | |
112 | if (IS_ERR(sgt)) { | |
113 | dev_err(dev->dev, "failed to allocate sgt: %ld\n", | |
114 | PTR_ERR(sgt)); | |
115 | return ERR_CAST(sgt); | |
116 | } | |
117 | ||
118 | etnaviv_obj->sgt = sgt; | |
119 | ||
120 | etnaviv_gem_scatter_map(etnaviv_obj); | |
121 | } | |
122 | ||
123 | return etnaviv_obj->pages; | |
124 | } | |
125 | ||
126 | void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj) | |
127 | { | |
128 | lockdep_assert_held(&etnaviv_obj->lock); | |
129 | /* when we start tracking the pin count, then do something here */ | |
130 | } | |
131 | ||
0e7f26e6 | 132 | static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
a8c21a54 T |
133 | struct vm_area_struct *vma) |
134 | { | |
a8c21a54 T |
135 | pgprot_t vm_page_prot; |
136 | ||
137 | vma->vm_flags &= ~VM_PFNMAP; | |
138 | vma->vm_flags |= VM_MIXEDMAP; | |
139 | ||
140 | vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
141 | ||
142 | if (etnaviv_obj->flags & ETNA_BO_WC) { | |
143 | vma->vm_page_prot = pgprot_writecombine(vm_page_prot); | |
144 | } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) { | |
145 | vma->vm_page_prot = pgprot_noncached(vm_page_prot); | |
146 | } else { | |
147 | /* | |
148 | * Shunt off cached objs to shmem file so they have their own | |
149 | * address_space (so unmap_mapping_range does what we want, | |
150 | * in particular in the case of mmap'd dmabufs) | |
151 | */ | |
152 | fput(vma->vm_file); | |
0e7f26e6 | 153 | get_file(etnaviv_obj->base.filp); |
a8c21a54 | 154 | vma->vm_pgoff = 0; |
0e7f26e6 | 155 | vma->vm_file = etnaviv_obj->base.filp; |
a8c21a54 T |
156 | |
157 | vma->vm_page_prot = vm_page_prot; | |
158 | } | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
164 | { | |
165 | struct etnaviv_gem_object *obj; | |
166 | int ret; | |
167 | ||
168 | ret = drm_gem_mmap(filp, vma); | |
169 | if (ret) { | |
170 | DBG("mmap failed: %d", ret); | |
171 | return ret; | |
172 | } | |
173 | ||
174 | obj = to_etnaviv_bo(vma->vm_private_data); | |
a10e2bde | 175 | return obj->ops->mmap(obj, vma); |
a8c21a54 T |
176 | } |
177 | ||
11bac800 | 178 | int etnaviv_gem_fault(struct vm_fault *vmf) |
a8c21a54 | 179 | { |
11bac800 | 180 | struct vm_area_struct *vma = vmf->vma; |
a8c21a54 T |
181 | struct drm_gem_object *obj = vma->vm_private_data; |
182 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
183 | struct page **pages, *page; | |
184 | pgoff_t pgoff; | |
185 | int ret; | |
186 | ||
187 | /* | |
188 | * Make sure we don't parallel update on a fault, nor move or remove | |
189 | * something from beneath our feet. Note that vm_insert_page() is | |
190 | * specifically coded to take care of this, so we don't have to. | |
191 | */ | |
192 | ret = mutex_lock_interruptible(&etnaviv_obj->lock); | |
193 | if (ret) | |
194 | goto out; | |
195 | ||
196 | /* make sure we have pages attached now */ | |
197 | pages = etnaviv_gem_get_pages(etnaviv_obj); | |
198 | mutex_unlock(&etnaviv_obj->lock); | |
199 | ||
200 | if (IS_ERR(pages)) { | |
201 | ret = PTR_ERR(pages); | |
202 | goto out; | |
203 | } | |
204 | ||
205 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
1a29d85e | 206 | pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
a8c21a54 T |
207 | |
208 | page = pages[pgoff]; | |
209 | ||
1a29d85e | 210 | VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, |
a8c21a54 T |
211 | page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT); |
212 | ||
1a29d85e | 213 | ret = vm_insert_page(vma, vmf->address, page); |
a8c21a54 T |
214 | |
215 | out: | |
216 | switch (ret) { | |
217 | case -EAGAIN: | |
218 | case 0: | |
219 | case -ERESTARTSYS: | |
220 | case -EINTR: | |
221 | case -EBUSY: | |
222 | /* | |
223 | * EBUSY is ok: this just means that another thread | |
224 | * already did the job. | |
225 | */ | |
226 | return VM_FAULT_NOPAGE; | |
227 | case -ENOMEM: | |
228 | return VM_FAULT_OOM; | |
229 | default: | |
230 | return VM_FAULT_SIGBUS; | |
231 | } | |
232 | } | |
233 | ||
234 | int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset) | |
235 | { | |
236 | int ret; | |
237 | ||
238 | /* Make it mmapable */ | |
239 | ret = drm_gem_create_mmap_offset(obj); | |
240 | if (ret) | |
241 | dev_err(obj->dev->dev, "could not allocate mmap offset\n"); | |
242 | else | |
243 | *offset = drm_vma_node_offset_addr(&obj->vma_node); | |
244 | ||
245 | return ret; | |
246 | } | |
247 | ||
248 | static struct etnaviv_vram_mapping * | |
249 | etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj, | |
250 | struct etnaviv_iommu *mmu) | |
251 | { | |
252 | struct etnaviv_vram_mapping *mapping; | |
253 | ||
254 | list_for_each_entry(mapping, &obj->vram_list, obj_node) { | |
255 | if (mapping->mmu == mmu) | |
256 | return mapping; | |
257 | } | |
258 | ||
259 | return NULL; | |
260 | } | |
261 | ||
b6325f40 RK |
262 | void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping) |
263 | { | |
264 | struct etnaviv_gem_object *etnaviv_obj = mapping->object; | |
265 | ||
266 | drm_gem_object_reference(&etnaviv_obj->base); | |
267 | ||
268 | mutex_lock(&etnaviv_obj->lock); | |
269 | WARN_ON(mapping->use == 0); | |
270 | mapping->use += 1; | |
271 | mutex_unlock(&etnaviv_obj->lock); | |
272 | } | |
273 | ||
274 | void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) | |
275 | { | |
276 | struct etnaviv_gem_object *etnaviv_obj = mapping->object; | |
277 | ||
278 | mutex_lock(&etnaviv_obj->lock); | |
279 | WARN_ON(mapping->use == 0); | |
280 | mapping->use -= 1; | |
281 | mutex_unlock(&etnaviv_obj->lock); | |
282 | ||
283 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
284 | } | |
285 | ||
286 | struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( | |
287 | struct drm_gem_object *obj, struct etnaviv_gpu *gpu) | |
a8c21a54 T |
288 | { |
289 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
290 | struct etnaviv_vram_mapping *mapping; | |
291 | struct page **pages; | |
292 | int ret = 0; | |
293 | ||
294 | mutex_lock(&etnaviv_obj->lock); | |
295 | mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, gpu->mmu); | |
296 | if (mapping) { | |
297 | /* | |
298 | * Holding the object lock prevents the use count changing | |
299 | * beneath us. If the use count is zero, the MMU might be | |
300 | * reaping this object, so take the lock and re-check that | |
301 | * the MMU owns this mapping to close this race. | |
302 | */ | |
303 | if (mapping->use == 0) { | |
304 | mutex_lock(&gpu->mmu->lock); | |
305 | if (mapping->mmu == gpu->mmu) | |
306 | mapping->use += 1; | |
307 | else | |
308 | mapping = NULL; | |
309 | mutex_unlock(&gpu->mmu->lock); | |
310 | if (mapping) | |
311 | goto out; | |
312 | } else { | |
313 | mapping->use += 1; | |
314 | goto out; | |
315 | } | |
316 | } | |
317 | ||
318 | pages = etnaviv_gem_get_pages(etnaviv_obj); | |
319 | if (IS_ERR(pages)) { | |
320 | ret = PTR_ERR(pages); | |
321 | goto out; | |
322 | } | |
323 | ||
324 | /* | |
325 | * See if we have a reaped vram mapping we can re-use before | |
326 | * allocating a fresh mapping. | |
327 | */ | |
328 | mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL); | |
329 | if (!mapping) { | |
330 | mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); | |
ed94add0 DC |
331 | if (!mapping) { |
332 | ret = -ENOMEM; | |
333 | goto out; | |
334 | } | |
a8c21a54 T |
335 | |
336 | INIT_LIST_HEAD(&mapping->scan_node); | |
337 | mapping->object = etnaviv_obj; | |
338 | } else { | |
339 | list_del(&mapping->obj_node); | |
340 | } | |
341 | ||
342 | mapping->mmu = gpu->mmu; | |
343 | mapping->use = 1; | |
344 | ||
345 | ret = etnaviv_iommu_map_gem(gpu->mmu, etnaviv_obj, gpu->memory_base, | |
346 | mapping); | |
347 | if (ret < 0) | |
348 | kfree(mapping); | |
349 | else | |
350 | list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list); | |
351 | ||
352 | out: | |
353 | mutex_unlock(&etnaviv_obj->lock); | |
354 | ||
b6325f40 RK |
355 | if (ret) |
356 | return ERR_PTR(ret); | |
a8c21a54 | 357 | |
b6325f40 RK |
358 | /* Take a reference on the object */ |
359 | drm_gem_object_reference(obj); | |
360 | return mapping; | |
a8c21a54 T |
361 | } |
362 | ||
ce3088fd | 363 | void *etnaviv_gem_vmap(struct drm_gem_object *obj) |
a8c21a54 T |
364 | { |
365 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
366 | ||
a0a5ab3e LS |
367 | if (etnaviv_obj->vaddr) |
368 | return etnaviv_obj->vaddr; | |
a8c21a54 | 369 | |
a0a5ab3e LS |
370 | mutex_lock(&etnaviv_obj->lock); |
371 | /* | |
372 | * Need to check again, as we might have raced with another thread | |
373 | * while waiting for the mutex. | |
374 | */ | |
375 | if (!etnaviv_obj->vaddr) | |
376 | etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj); | |
a8c21a54 T |
377 | mutex_unlock(&etnaviv_obj->lock); |
378 | ||
379 | return etnaviv_obj->vaddr; | |
380 | } | |
381 | ||
a0a5ab3e LS |
382 | static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj) |
383 | { | |
384 | struct page **pages; | |
385 | ||
386 | lockdep_assert_held(&obj->lock); | |
387 | ||
388 | pages = etnaviv_gem_get_pages(obj); | |
389 | if (IS_ERR(pages)) | |
390 | return NULL; | |
391 | ||
392 | return vmap(pages, obj->base.size >> PAGE_SHIFT, | |
393 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
394 | } | |
395 | ||
a8c21a54 T |
396 | static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op) |
397 | { | |
398 | if (op & ETNA_PREP_READ) | |
399 | return DMA_FROM_DEVICE; | |
400 | else if (op & ETNA_PREP_WRITE) | |
401 | return DMA_TO_DEVICE; | |
402 | else | |
403 | return DMA_BIDIRECTIONAL; | |
404 | } | |
405 | ||
406 | int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op, | |
407 | struct timespec *timeout) | |
408 | { | |
409 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
410 | struct drm_device *dev = obj->dev; | |
411 | bool write = !!(op & ETNA_PREP_WRITE); | |
cd34db4a CW |
412 | unsigned long remain = |
413 | op & ETNA_PREP_NOSYNC ? 0 : etnaviv_timeout_to_jiffies(timeout); | |
414 | long lret; | |
415 | ||
416 | lret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv, | |
417 | write, true, remain); | |
418 | if (lret < 0) | |
419 | return lret; | |
420 | else if (lret == 0) | |
421 | return remain == 0 ? -EBUSY : -ETIMEDOUT; | |
a8c21a54 T |
422 | |
423 | if (etnaviv_obj->flags & ETNA_BO_CACHED) { | |
424 | if (!etnaviv_obj->sgt) { | |
425 | void *ret; | |
426 | ||
427 | mutex_lock(&etnaviv_obj->lock); | |
428 | ret = etnaviv_gem_get_pages(etnaviv_obj); | |
429 | mutex_unlock(&etnaviv_obj->lock); | |
430 | if (IS_ERR(ret)) | |
431 | return PTR_ERR(ret); | |
432 | } | |
433 | ||
434 | dma_sync_sg_for_cpu(dev->dev, etnaviv_obj->sgt->sgl, | |
435 | etnaviv_obj->sgt->nents, | |
436 | etnaviv_op_to_dma_dir(op)); | |
437 | etnaviv_obj->last_cpu_prep_op = op; | |
438 | } | |
439 | ||
440 | return 0; | |
441 | } | |
442 | ||
443 | int etnaviv_gem_cpu_fini(struct drm_gem_object *obj) | |
444 | { | |
445 | struct drm_device *dev = obj->dev; | |
446 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
447 | ||
448 | if (etnaviv_obj->flags & ETNA_BO_CACHED) { | |
449 | /* fini without a prep is almost certainly a userspace error */ | |
450 | WARN_ON(etnaviv_obj->last_cpu_prep_op == 0); | |
451 | dma_sync_sg_for_device(dev->dev, etnaviv_obj->sgt->sgl, | |
452 | etnaviv_obj->sgt->nents, | |
453 | etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op)); | |
454 | etnaviv_obj->last_cpu_prep_op = 0; | |
455 | } | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj, | |
461 | struct timespec *timeout) | |
462 | { | |
463 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
464 | ||
465 | return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout); | |
466 | } | |
467 | ||
468 | #ifdef CONFIG_DEBUG_FS | |
f54d1867 | 469 | static void etnaviv_gem_describe_fence(struct dma_fence *fence, |
a8c21a54 T |
470 | const char *type, struct seq_file *m) |
471 | { | |
f54d1867 | 472 | if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) |
a8c21a54 T |
473 | seq_printf(m, "\t%9s: %s %s seq %u\n", |
474 | type, | |
475 | fence->ops->get_driver_name(fence), | |
476 | fence->ops->get_timeline_name(fence), | |
477 | fence->seqno); | |
478 | } | |
479 | ||
480 | static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m) | |
481 | { | |
482 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
483 | struct reservation_object *robj = etnaviv_obj->resv; | |
484 | struct reservation_object_list *fobj; | |
f54d1867 | 485 | struct dma_fence *fence; |
a8c21a54 T |
486 | unsigned long off = drm_vma_node_start(&obj->vma_node); |
487 | ||
488 | seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n", | |
489 | etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I', | |
2c935bc5 | 490 | obj->name, kref_read(&obj->refcount), |
a8c21a54 T |
491 | off, etnaviv_obj->vaddr, obj->size); |
492 | ||
493 | rcu_read_lock(); | |
494 | fobj = rcu_dereference(robj->fence); | |
495 | if (fobj) { | |
496 | unsigned int i, shared_count = fobj->shared_count; | |
497 | ||
498 | for (i = 0; i < shared_count; i++) { | |
499 | fence = rcu_dereference(fobj->shared[i]); | |
500 | etnaviv_gem_describe_fence(fence, "Shared", m); | |
501 | } | |
502 | } | |
503 | ||
504 | fence = rcu_dereference(robj->fence_excl); | |
505 | if (fence) | |
506 | etnaviv_gem_describe_fence(fence, "Exclusive", m); | |
507 | rcu_read_unlock(); | |
508 | } | |
509 | ||
510 | void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv, | |
511 | struct seq_file *m) | |
512 | { | |
513 | struct etnaviv_gem_object *etnaviv_obj; | |
514 | int count = 0; | |
515 | size_t size = 0; | |
516 | ||
517 | mutex_lock(&priv->gem_lock); | |
518 | list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) { | |
519 | struct drm_gem_object *obj = &etnaviv_obj->base; | |
520 | ||
521 | seq_puts(m, " "); | |
522 | etnaviv_gem_describe(obj, m); | |
523 | count++; | |
524 | size += obj->size; | |
525 | } | |
526 | mutex_unlock(&priv->gem_lock); | |
527 | ||
528 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
529 | } | |
530 | #endif | |
531 | ||
532 | static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj) | |
533 | { | |
8c6e6188 | 534 | vunmap(etnaviv_obj->vaddr); |
a8c21a54 T |
535 | put_pages(etnaviv_obj); |
536 | } | |
537 | ||
538 | static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = { | |
539 | .get_pages = etnaviv_gem_shmem_get_pages, | |
540 | .release = etnaviv_gem_shmem_release, | |
a0a5ab3e | 541 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 542 | .mmap = etnaviv_gem_mmap_obj, |
a8c21a54 T |
543 | }; |
544 | ||
545 | void etnaviv_gem_free_object(struct drm_gem_object *obj) | |
546 | { | |
547 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
548 | struct etnaviv_vram_mapping *mapping, *tmp; | |
549 | ||
550 | /* object should not be active */ | |
551 | WARN_ON(is_active(etnaviv_obj)); | |
552 | ||
553 | list_del(&etnaviv_obj->gem_node); | |
554 | ||
555 | list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list, | |
556 | obj_node) { | |
557 | struct etnaviv_iommu *mmu = mapping->mmu; | |
558 | ||
559 | WARN_ON(mapping->use); | |
560 | ||
561 | if (mmu) | |
562 | etnaviv_iommu_unmap_gem(mmu, mapping); | |
563 | ||
564 | list_del(&mapping->obj_node); | |
565 | kfree(mapping); | |
566 | } | |
567 | ||
568 | drm_gem_free_mmap_offset(obj); | |
569 | etnaviv_obj->ops->release(etnaviv_obj); | |
570 | if (etnaviv_obj->resv == &etnaviv_obj->_resv) | |
571 | reservation_object_fini(&etnaviv_obj->_resv); | |
572 | drm_gem_object_release(obj); | |
573 | ||
574 | kfree(etnaviv_obj); | |
575 | } | |
576 | ||
577 | int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj) | |
578 | { | |
579 | struct etnaviv_drm_private *priv = dev->dev_private; | |
580 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
581 | ||
582 | mutex_lock(&priv->gem_lock); | |
583 | list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list); | |
584 | mutex_unlock(&priv->gem_lock); | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
589 | static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags, | |
590 | struct reservation_object *robj, const struct etnaviv_gem_ops *ops, | |
591 | struct drm_gem_object **obj) | |
592 | { | |
593 | struct etnaviv_gem_object *etnaviv_obj; | |
594 | unsigned sz = sizeof(*etnaviv_obj); | |
595 | bool valid = true; | |
596 | ||
597 | /* validate flags */ | |
598 | switch (flags & ETNA_BO_CACHE_MASK) { | |
599 | case ETNA_BO_UNCACHED: | |
600 | case ETNA_BO_CACHED: | |
601 | case ETNA_BO_WC: | |
602 | break; | |
603 | default: | |
604 | valid = false; | |
605 | } | |
606 | ||
607 | if (!valid) { | |
608 | dev_err(dev->dev, "invalid cache flag: %x\n", | |
609 | (flags & ETNA_BO_CACHE_MASK)); | |
610 | return -EINVAL; | |
611 | } | |
612 | ||
613 | etnaviv_obj = kzalloc(sz, GFP_KERNEL); | |
614 | if (!etnaviv_obj) | |
615 | return -ENOMEM; | |
616 | ||
617 | etnaviv_obj->flags = flags; | |
618 | etnaviv_obj->ops = ops; | |
619 | if (robj) { | |
620 | etnaviv_obj->resv = robj; | |
621 | } else { | |
622 | etnaviv_obj->resv = &etnaviv_obj->_resv; | |
623 | reservation_object_init(&etnaviv_obj->_resv); | |
624 | } | |
625 | ||
626 | mutex_init(&etnaviv_obj->lock); | |
627 | INIT_LIST_HEAD(&etnaviv_obj->vram_list); | |
628 | ||
629 | *obj = &etnaviv_obj->base; | |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
634 | static struct drm_gem_object *__etnaviv_gem_new(struct drm_device *dev, | |
635 | u32 size, u32 flags) | |
636 | { | |
637 | struct drm_gem_object *obj = NULL; | |
638 | int ret; | |
639 | ||
640 | size = PAGE_ALIGN(size); | |
641 | ||
642 | ret = etnaviv_gem_new_impl(dev, size, flags, NULL, | |
643 | &etnaviv_gem_shmem_ops, &obj); | |
644 | if (ret) | |
645 | goto fail; | |
646 | ||
647 | ret = drm_gem_object_init(dev, obj, size); | |
648 | if (ret == 0) { | |
649 | struct address_space *mapping; | |
650 | ||
651 | /* | |
652 | * Our buffers are kept pinned, so allocating them | |
653 | * from the MOVABLE zone is a really bad idea, and | |
654 | * conflicts with CMA. See coments above new_inode() | |
655 | * why this is required _and_ expected if you're | |
656 | * going to pin these pages. | |
657 | */ | |
93c76a3d | 658 | mapping = obj->filp->f_mapping; |
a8c21a54 T |
659 | mapping_set_gfp_mask(mapping, GFP_HIGHUSER); |
660 | } | |
661 | ||
662 | if (ret) | |
663 | goto fail; | |
664 | ||
665 | return obj; | |
666 | ||
667 | fail: | |
8c6e6188 | 668 | drm_gem_object_unreference_unlocked(obj); |
a8c21a54 T |
669 | return ERR_PTR(ret); |
670 | } | |
671 | ||
672 | /* convenience method to construct a GEM buffer object, and userspace handle */ | |
673 | int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
674 | u32 size, u32 flags, u32 *handle) | |
675 | { | |
676 | struct drm_gem_object *obj; | |
677 | int ret; | |
678 | ||
679 | obj = __etnaviv_gem_new(dev, size, flags); | |
680 | if (IS_ERR(obj)) | |
681 | return PTR_ERR(obj); | |
682 | ||
683 | ret = etnaviv_gem_obj_add(dev, obj); | |
684 | if (ret < 0) { | |
685 | drm_gem_object_unreference_unlocked(obj); | |
686 | return ret; | |
687 | } | |
688 | ||
689 | ret = drm_gem_handle_create(file, obj, handle); | |
690 | ||
691 | /* drop reference from allocate - handle holds it now */ | |
692 | drm_gem_object_unreference_unlocked(obj); | |
693 | ||
694 | return ret; | |
695 | } | |
696 | ||
697 | struct drm_gem_object *etnaviv_gem_new(struct drm_device *dev, | |
698 | u32 size, u32 flags) | |
699 | { | |
700 | struct drm_gem_object *obj; | |
701 | int ret; | |
702 | ||
703 | obj = __etnaviv_gem_new(dev, size, flags); | |
704 | if (IS_ERR(obj)) | |
705 | return obj; | |
706 | ||
707 | ret = etnaviv_gem_obj_add(dev, obj); | |
708 | if (ret < 0) { | |
709 | drm_gem_object_unreference_unlocked(obj); | |
710 | return ERR_PTR(ret); | |
711 | } | |
712 | ||
713 | return obj; | |
714 | } | |
715 | ||
716 | int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags, | |
717 | struct reservation_object *robj, const struct etnaviv_gem_ops *ops, | |
718 | struct etnaviv_gem_object **res) | |
719 | { | |
720 | struct drm_gem_object *obj; | |
721 | int ret; | |
722 | ||
723 | ret = etnaviv_gem_new_impl(dev, size, flags, robj, ops, &obj); | |
724 | if (ret) | |
725 | return ret; | |
726 | ||
727 | drm_gem_private_object_init(dev, obj, size); | |
728 | ||
729 | *res = to_etnaviv_bo(obj); | |
730 | ||
731 | return 0; | |
732 | } | |
733 | ||
734 | struct get_pages_work { | |
735 | struct work_struct work; | |
736 | struct mm_struct *mm; | |
737 | struct task_struct *task; | |
738 | struct etnaviv_gem_object *etnaviv_obj; | |
739 | }; | |
740 | ||
741 | static struct page **etnaviv_gem_userptr_do_get_pages( | |
742 | struct etnaviv_gem_object *etnaviv_obj, struct mm_struct *mm, struct task_struct *task) | |
743 | { | |
744 | int ret = 0, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
745 | struct page **pvec; | |
746 | uintptr_t ptr; | |
9beae1ea | 747 | unsigned int flags = 0; |
a8c21a54 T |
748 | |
749 | pvec = drm_malloc_ab(npages, sizeof(struct page *)); | |
750 | if (!pvec) | |
751 | return ERR_PTR(-ENOMEM); | |
752 | ||
9beae1ea LS |
753 | if (!etnaviv_obj->userptr.ro) |
754 | flags |= FOLL_WRITE; | |
755 | ||
a8c21a54 T |
756 | pinned = 0; |
757 | ptr = etnaviv_obj->userptr.ptr; | |
758 | ||
759 | down_read(&mm->mmap_sem); | |
760 | while (pinned < npages) { | |
1e987790 | 761 | ret = get_user_pages_remote(task, mm, ptr, npages - pinned, |
5b56d49f | 762 | flags, pvec + pinned, NULL, NULL); |
a8c21a54 T |
763 | if (ret < 0) |
764 | break; | |
765 | ||
766 | ptr += ret * PAGE_SIZE; | |
767 | pinned += ret; | |
768 | } | |
769 | up_read(&mm->mmap_sem); | |
770 | ||
771 | if (ret < 0) { | |
772 | release_pages(pvec, pinned, 0); | |
773 | drm_free_large(pvec); | |
774 | return ERR_PTR(ret); | |
775 | } | |
776 | ||
777 | return pvec; | |
778 | } | |
779 | ||
780 | static void __etnaviv_gem_userptr_get_pages(struct work_struct *_work) | |
781 | { | |
782 | struct get_pages_work *work = container_of(_work, typeof(*work), work); | |
783 | struct etnaviv_gem_object *etnaviv_obj = work->etnaviv_obj; | |
784 | struct page **pvec; | |
785 | ||
786 | pvec = etnaviv_gem_userptr_do_get_pages(etnaviv_obj, work->mm, work->task); | |
787 | ||
788 | mutex_lock(&etnaviv_obj->lock); | |
789 | if (IS_ERR(pvec)) { | |
790 | etnaviv_obj->userptr.work = ERR_CAST(pvec); | |
791 | } else { | |
792 | etnaviv_obj->userptr.work = NULL; | |
793 | etnaviv_obj->pages = pvec; | |
794 | } | |
795 | ||
796 | mutex_unlock(&etnaviv_obj->lock); | |
797 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
798 | ||
799 | mmput(work->mm); | |
800 | put_task_struct(work->task); | |
801 | kfree(work); | |
802 | } | |
803 | ||
804 | static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
805 | { | |
806 | struct page **pvec = NULL; | |
807 | struct get_pages_work *work; | |
808 | struct mm_struct *mm; | |
809 | int ret, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
810 | ||
811 | if (etnaviv_obj->userptr.work) { | |
812 | if (IS_ERR(etnaviv_obj->userptr.work)) { | |
813 | ret = PTR_ERR(etnaviv_obj->userptr.work); | |
814 | etnaviv_obj->userptr.work = NULL; | |
815 | } else { | |
816 | ret = -EAGAIN; | |
817 | } | |
818 | return ret; | |
819 | } | |
820 | ||
821 | mm = get_task_mm(etnaviv_obj->userptr.task); | |
822 | pinned = 0; | |
823 | if (mm == current->mm) { | |
824 | pvec = drm_malloc_ab(npages, sizeof(struct page *)); | |
825 | if (!pvec) { | |
826 | mmput(mm); | |
827 | return -ENOMEM; | |
828 | } | |
829 | ||
830 | pinned = __get_user_pages_fast(etnaviv_obj->userptr.ptr, npages, | |
831 | !etnaviv_obj->userptr.ro, pvec); | |
832 | if (pinned < 0) { | |
833 | drm_free_large(pvec); | |
834 | mmput(mm); | |
835 | return pinned; | |
836 | } | |
837 | ||
838 | if (pinned == npages) { | |
839 | etnaviv_obj->pages = pvec; | |
840 | mmput(mm); | |
841 | return 0; | |
842 | } | |
843 | } | |
844 | ||
845 | release_pages(pvec, pinned, 0); | |
846 | drm_free_large(pvec); | |
847 | ||
848 | work = kmalloc(sizeof(*work), GFP_KERNEL); | |
849 | if (!work) { | |
850 | mmput(mm); | |
851 | return -ENOMEM; | |
852 | } | |
853 | ||
854 | get_task_struct(current); | |
855 | drm_gem_object_reference(&etnaviv_obj->base); | |
856 | ||
857 | work->mm = mm; | |
858 | work->task = current; | |
859 | work->etnaviv_obj = etnaviv_obj; | |
860 | ||
861 | etnaviv_obj->userptr.work = &work->work; | |
862 | INIT_WORK(&work->work, __etnaviv_gem_userptr_get_pages); | |
863 | ||
864 | etnaviv_queue_work(etnaviv_obj->base.dev, &work->work); | |
865 | ||
866 | return -EAGAIN; | |
867 | } | |
868 | ||
869 | static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj) | |
870 | { | |
871 | if (etnaviv_obj->sgt) { | |
872 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
873 | sg_free_table(etnaviv_obj->sgt); | |
874 | kfree(etnaviv_obj->sgt); | |
875 | } | |
876 | if (etnaviv_obj->pages) { | |
877 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
878 | ||
879 | release_pages(etnaviv_obj->pages, npages, 0); | |
880 | drm_free_large(etnaviv_obj->pages); | |
881 | } | |
882 | put_task_struct(etnaviv_obj->userptr.task); | |
883 | } | |
884 | ||
a10e2bde LS |
885 | static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
886 | struct vm_area_struct *vma) | |
887 | { | |
888 | return -EINVAL; | |
889 | } | |
890 | ||
a8c21a54 T |
891 | static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = { |
892 | .get_pages = etnaviv_gem_userptr_get_pages, | |
893 | .release = etnaviv_gem_userptr_release, | |
a0a5ab3e | 894 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 895 | .mmap = etnaviv_gem_userptr_mmap_obj, |
a8c21a54 T |
896 | }; |
897 | ||
898 | int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file, | |
899 | uintptr_t ptr, u32 size, u32 flags, u32 *handle) | |
900 | { | |
901 | struct etnaviv_gem_object *etnaviv_obj; | |
902 | int ret; | |
903 | ||
904 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, NULL, | |
905 | &etnaviv_gem_userptr_ops, &etnaviv_obj); | |
906 | if (ret) | |
907 | return ret; | |
908 | ||
909 | etnaviv_obj->userptr.ptr = ptr; | |
910 | etnaviv_obj->userptr.task = current; | |
911 | etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE); | |
912 | get_task_struct(current); | |
913 | ||
914 | ret = etnaviv_gem_obj_add(dev, &etnaviv_obj->base); | |
d9a7ed77 ME |
915 | if (ret) |
916 | goto unreference; | |
a8c21a54 T |
917 | |
918 | ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle); | |
d9a7ed77 | 919 | unreference: |
a8c21a54 T |
920 | /* drop reference from allocate - handle holds it now */ |
921 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
a8c21a54 T |
922 | return ret; |
923 | } |