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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> | |
6e84f315 | 19 | #include <linux/sched/mm.h> |
a8c21a54 T |
20 | |
21 | #include "etnaviv_drv.h" | |
22 | #include "etnaviv_gem.h" | |
23 | #include "etnaviv_gpu.h" | |
24 | #include "etnaviv_mmu.h" | |
25 | ||
26 | static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj) | |
27 | { | |
28 | struct drm_device *dev = etnaviv_obj->base.dev; | |
29 | struct sg_table *sgt = etnaviv_obj->sgt; | |
30 | ||
31 | /* | |
32 | * For non-cached buffers, ensure the new pages are clean | |
33 | * because display controller, GPU, etc. are not coherent. | |
34 | */ | |
35 | if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) | |
36 | dma_map_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL); | |
37 | } | |
38 | ||
39 | static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj) | |
40 | { | |
41 | struct drm_device *dev = etnaviv_obj->base.dev; | |
42 | struct sg_table *sgt = etnaviv_obj->sgt; | |
43 | ||
44 | /* | |
45 | * For non-cached buffers, ensure the new pages are clean | |
46 | * because display controller, GPU, etc. are not coherent: | |
47 | * | |
48 | * WARNING: The DMA API does not support concurrent CPU | |
49 | * and device access to the memory area. With BIDIRECTIONAL, | |
50 | * we will clean the cache lines which overlap the region, | |
51 | * and invalidate all cache lines (partially) contained in | |
52 | * the region. | |
53 | * | |
54 | * If you have dirty data in the overlapping cache lines, | |
55 | * that will corrupt the GPU-written data. If you have | |
56 | * written into the remainder of the region, this can | |
57 | * discard those writes. | |
58 | */ | |
59 | if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) | |
60 | dma_unmap_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL); | |
61 | } | |
62 | ||
63 | /* called with etnaviv_obj->lock held */ | |
64 | static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
65 | { | |
66 | struct drm_device *dev = etnaviv_obj->base.dev; | |
67 | struct page **p = drm_gem_get_pages(&etnaviv_obj->base); | |
68 | ||
69 | if (IS_ERR(p)) { | |
70 | dev_err(dev->dev, "could not get pages: %ld\n", PTR_ERR(p)); | |
71 | return PTR_ERR(p); | |
72 | } | |
73 | ||
74 | etnaviv_obj->pages = p; | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
79 | static void put_pages(struct etnaviv_gem_object *etnaviv_obj) | |
80 | { | |
81 | if (etnaviv_obj->sgt) { | |
82 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
83 | sg_free_table(etnaviv_obj->sgt); | |
84 | kfree(etnaviv_obj->sgt); | |
85 | etnaviv_obj->sgt = NULL; | |
86 | } | |
87 | if (etnaviv_obj->pages) { | |
88 | drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages, | |
89 | true, false); | |
90 | ||
91 | etnaviv_obj->pages = NULL; | |
92 | } | |
93 | } | |
94 | ||
95 | struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
96 | { | |
97 | int ret; | |
98 | ||
99 | lockdep_assert_held(&etnaviv_obj->lock); | |
100 | ||
101 | if (!etnaviv_obj->pages) { | |
102 | ret = etnaviv_obj->ops->get_pages(etnaviv_obj); | |
103 | if (ret < 0) | |
104 | return ERR_PTR(ret); | |
105 | } | |
106 | ||
107 | if (!etnaviv_obj->sgt) { | |
108 | struct drm_device *dev = etnaviv_obj->base.dev; | |
109 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
110 | struct sg_table *sgt; | |
111 | ||
112 | sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages); | |
113 | if (IS_ERR(sgt)) { | |
114 | dev_err(dev->dev, "failed to allocate sgt: %ld\n", | |
115 | PTR_ERR(sgt)); | |
116 | return ERR_CAST(sgt); | |
117 | } | |
118 | ||
119 | etnaviv_obj->sgt = sgt; | |
120 | ||
121 | etnaviv_gem_scatter_map(etnaviv_obj); | |
122 | } | |
123 | ||
124 | return etnaviv_obj->pages; | |
125 | } | |
126 | ||
127 | void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj) | |
128 | { | |
129 | lockdep_assert_held(&etnaviv_obj->lock); | |
130 | /* when we start tracking the pin count, then do something here */ | |
131 | } | |
132 | ||
0e7f26e6 | 133 | static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
a8c21a54 T |
134 | struct vm_area_struct *vma) |
135 | { | |
a8c21a54 T |
136 | pgprot_t vm_page_prot; |
137 | ||
138 | vma->vm_flags &= ~VM_PFNMAP; | |
139 | vma->vm_flags |= VM_MIXEDMAP; | |
140 | ||
141 | vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
142 | ||
143 | if (etnaviv_obj->flags & ETNA_BO_WC) { | |
144 | vma->vm_page_prot = pgprot_writecombine(vm_page_prot); | |
145 | } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) { | |
146 | vma->vm_page_prot = pgprot_noncached(vm_page_prot); | |
147 | } else { | |
148 | /* | |
149 | * Shunt off cached objs to shmem file so they have their own | |
150 | * address_space (so unmap_mapping_range does what we want, | |
151 | * in particular in the case of mmap'd dmabufs) | |
152 | */ | |
153 | fput(vma->vm_file); | |
0e7f26e6 | 154 | get_file(etnaviv_obj->base.filp); |
a8c21a54 | 155 | vma->vm_pgoff = 0; |
0e7f26e6 | 156 | vma->vm_file = etnaviv_obj->base.filp; |
a8c21a54 T |
157 | |
158 | vma->vm_page_prot = vm_page_prot; | |
159 | } | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
165 | { | |
166 | struct etnaviv_gem_object *obj; | |
167 | int ret; | |
168 | ||
169 | ret = drm_gem_mmap(filp, vma); | |
170 | if (ret) { | |
171 | DBG("mmap failed: %d", ret); | |
172 | return ret; | |
173 | } | |
174 | ||
175 | obj = to_etnaviv_bo(vma->vm_private_data); | |
a10e2bde | 176 | return obj->ops->mmap(obj, vma); |
a8c21a54 T |
177 | } |
178 | ||
11bac800 | 179 | int etnaviv_gem_fault(struct vm_fault *vmf) |
a8c21a54 | 180 | { |
11bac800 | 181 | struct vm_area_struct *vma = vmf->vma; |
a8c21a54 T |
182 | struct drm_gem_object *obj = vma->vm_private_data; |
183 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
184 | struct page **pages, *page; | |
185 | pgoff_t pgoff; | |
186 | int ret; | |
187 | ||
188 | /* | |
189 | * Make sure we don't parallel update on a fault, nor move or remove | |
190 | * something from beneath our feet. Note that vm_insert_page() is | |
191 | * specifically coded to take care of this, so we don't have to. | |
192 | */ | |
193 | ret = mutex_lock_interruptible(&etnaviv_obj->lock); | |
194 | if (ret) | |
195 | goto out; | |
196 | ||
197 | /* make sure we have pages attached now */ | |
198 | pages = etnaviv_gem_get_pages(etnaviv_obj); | |
199 | mutex_unlock(&etnaviv_obj->lock); | |
200 | ||
201 | if (IS_ERR(pages)) { | |
202 | ret = PTR_ERR(pages); | |
203 | goto out; | |
204 | } | |
205 | ||
206 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
1a29d85e | 207 | pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
a8c21a54 T |
208 | |
209 | page = pages[pgoff]; | |
210 | ||
1a29d85e | 211 | VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, |
a8c21a54 T |
212 | page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT); |
213 | ||
1a29d85e | 214 | ret = vm_insert_page(vma, vmf->address, page); |
a8c21a54 T |
215 | |
216 | out: | |
217 | switch (ret) { | |
218 | case -EAGAIN: | |
219 | case 0: | |
220 | case -ERESTARTSYS: | |
221 | case -EINTR: | |
222 | case -EBUSY: | |
223 | /* | |
224 | * EBUSY is ok: this just means that another thread | |
225 | * already did the job. | |
226 | */ | |
227 | return VM_FAULT_NOPAGE; | |
228 | case -ENOMEM: | |
229 | return VM_FAULT_OOM; | |
230 | default: | |
231 | return VM_FAULT_SIGBUS; | |
232 | } | |
233 | } | |
234 | ||
235 | int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset) | |
236 | { | |
237 | int ret; | |
238 | ||
239 | /* Make it mmapable */ | |
240 | ret = drm_gem_create_mmap_offset(obj); | |
241 | if (ret) | |
242 | dev_err(obj->dev->dev, "could not allocate mmap offset\n"); | |
243 | else | |
244 | *offset = drm_vma_node_offset_addr(&obj->vma_node); | |
245 | ||
246 | return ret; | |
247 | } | |
248 | ||
249 | static struct etnaviv_vram_mapping * | |
250 | etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj, | |
251 | struct etnaviv_iommu *mmu) | |
252 | { | |
253 | struct etnaviv_vram_mapping *mapping; | |
254 | ||
255 | list_for_each_entry(mapping, &obj->vram_list, obj_node) { | |
256 | if (mapping->mmu == mmu) | |
257 | return mapping; | |
258 | } | |
259 | ||
260 | return NULL; | |
261 | } | |
262 | ||
b6325f40 RK |
263 | void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping) |
264 | { | |
265 | struct etnaviv_gem_object *etnaviv_obj = mapping->object; | |
266 | ||
267 | drm_gem_object_reference(&etnaviv_obj->base); | |
268 | ||
269 | mutex_lock(&etnaviv_obj->lock); | |
270 | WARN_ON(mapping->use == 0); | |
271 | mapping->use += 1; | |
272 | mutex_unlock(&etnaviv_obj->lock); | |
273 | } | |
274 | ||
275 | void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) | |
276 | { | |
277 | struct etnaviv_gem_object *etnaviv_obj = mapping->object; | |
278 | ||
279 | mutex_lock(&etnaviv_obj->lock); | |
280 | WARN_ON(mapping->use == 0); | |
281 | mapping->use -= 1; | |
282 | mutex_unlock(&etnaviv_obj->lock); | |
283 | ||
284 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
285 | } | |
286 | ||
287 | struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( | |
288 | struct drm_gem_object *obj, struct etnaviv_gpu *gpu) | |
a8c21a54 T |
289 | { |
290 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
291 | struct etnaviv_vram_mapping *mapping; | |
292 | struct page **pages; | |
293 | int ret = 0; | |
294 | ||
295 | mutex_lock(&etnaviv_obj->lock); | |
296 | mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, gpu->mmu); | |
297 | if (mapping) { | |
298 | /* | |
299 | * Holding the object lock prevents the use count changing | |
300 | * beneath us. If the use count is zero, the MMU might be | |
301 | * reaping this object, so take the lock and re-check that | |
302 | * the MMU owns this mapping to close this race. | |
303 | */ | |
304 | if (mapping->use == 0) { | |
305 | mutex_lock(&gpu->mmu->lock); | |
306 | if (mapping->mmu == gpu->mmu) | |
307 | mapping->use += 1; | |
308 | else | |
309 | mapping = NULL; | |
310 | mutex_unlock(&gpu->mmu->lock); | |
311 | if (mapping) | |
312 | goto out; | |
313 | } else { | |
314 | mapping->use += 1; | |
315 | goto out; | |
316 | } | |
317 | } | |
318 | ||
319 | pages = etnaviv_gem_get_pages(etnaviv_obj); | |
320 | if (IS_ERR(pages)) { | |
321 | ret = PTR_ERR(pages); | |
322 | goto out; | |
323 | } | |
324 | ||
325 | /* | |
326 | * See if we have a reaped vram mapping we can re-use before | |
327 | * allocating a fresh mapping. | |
328 | */ | |
329 | mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL); | |
330 | if (!mapping) { | |
331 | mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); | |
ed94add0 DC |
332 | if (!mapping) { |
333 | ret = -ENOMEM; | |
334 | goto out; | |
335 | } | |
a8c21a54 T |
336 | |
337 | INIT_LIST_HEAD(&mapping->scan_node); | |
338 | mapping->object = etnaviv_obj; | |
339 | } else { | |
340 | list_del(&mapping->obj_node); | |
341 | } | |
342 | ||
343 | mapping->mmu = gpu->mmu; | |
344 | mapping->use = 1; | |
345 | ||
346 | ret = etnaviv_iommu_map_gem(gpu->mmu, etnaviv_obj, gpu->memory_base, | |
347 | mapping); | |
348 | if (ret < 0) | |
349 | kfree(mapping); | |
350 | else | |
351 | list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list); | |
352 | ||
353 | out: | |
354 | mutex_unlock(&etnaviv_obj->lock); | |
355 | ||
b6325f40 RK |
356 | if (ret) |
357 | return ERR_PTR(ret); | |
a8c21a54 | 358 | |
b6325f40 RK |
359 | /* Take a reference on the object */ |
360 | drm_gem_object_reference(obj); | |
361 | return mapping; | |
a8c21a54 T |
362 | } |
363 | ||
ce3088fd | 364 | void *etnaviv_gem_vmap(struct drm_gem_object *obj) |
a8c21a54 T |
365 | { |
366 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
367 | ||
a0a5ab3e LS |
368 | if (etnaviv_obj->vaddr) |
369 | return etnaviv_obj->vaddr; | |
a8c21a54 | 370 | |
a0a5ab3e LS |
371 | mutex_lock(&etnaviv_obj->lock); |
372 | /* | |
373 | * Need to check again, as we might have raced with another thread | |
374 | * while waiting for the mutex. | |
375 | */ | |
376 | if (!etnaviv_obj->vaddr) | |
377 | etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj); | |
a8c21a54 T |
378 | mutex_unlock(&etnaviv_obj->lock); |
379 | ||
380 | return etnaviv_obj->vaddr; | |
381 | } | |
382 | ||
a0a5ab3e LS |
383 | static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj) |
384 | { | |
385 | struct page **pages; | |
386 | ||
387 | lockdep_assert_held(&obj->lock); | |
388 | ||
389 | pages = etnaviv_gem_get_pages(obj); | |
390 | if (IS_ERR(pages)) | |
391 | return NULL; | |
392 | ||
393 | return vmap(pages, obj->base.size >> PAGE_SHIFT, | |
394 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
395 | } | |
396 | ||
a8c21a54 T |
397 | static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op) |
398 | { | |
399 | if (op & ETNA_PREP_READ) | |
400 | return DMA_FROM_DEVICE; | |
401 | else if (op & ETNA_PREP_WRITE) | |
402 | return DMA_TO_DEVICE; | |
403 | else | |
404 | return DMA_BIDIRECTIONAL; | |
405 | } | |
406 | ||
407 | int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op, | |
408 | struct timespec *timeout) | |
409 | { | |
410 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
411 | struct drm_device *dev = obj->dev; | |
412 | bool write = !!(op & ETNA_PREP_WRITE); | |
cd34db4a CW |
413 | unsigned long remain = |
414 | op & ETNA_PREP_NOSYNC ? 0 : etnaviv_timeout_to_jiffies(timeout); | |
415 | long lret; | |
416 | ||
417 | lret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv, | |
418 | write, true, remain); | |
419 | if (lret < 0) | |
420 | return lret; | |
421 | else if (lret == 0) | |
422 | return remain == 0 ? -EBUSY : -ETIMEDOUT; | |
a8c21a54 T |
423 | |
424 | if (etnaviv_obj->flags & ETNA_BO_CACHED) { | |
425 | if (!etnaviv_obj->sgt) { | |
426 | void *ret; | |
427 | ||
428 | mutex_lock(&etnaviv_obj->lock); | |
429 | ret = etnaviv_gem_get_pages(etnaviv_obj); | |
430 | mutex_unlock(&etnaviv_obj->lock); | |
431 | if (IS_ERR(ret)) | |
432 | return PTR_ERR(ret); | |
433 | } | |
434 | ||
435 | dma_sync_sg_for_cpu(dev->dev, etnaviv_obj->sgt->sgl, | |
436 | etnaviv_obj->sgt->nents, | |
437 | etnaviv_op_to_dma_dir(op)); | |
438 | etnaviv_obj->last_cpu_prep_op = op; | |
439 | } | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
444 | int etnaviv_gem_cpu_fini(struct drm_gem_object *obj) | |
445 | { | |
446 | struct drm_device *dev = obj->dev; | |
447 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
448 | ||
449 | if (etnaviv_obj->flags & ETNA_BO_CACHED) { | |
450 | /* fini without a prep is almost certainly a userspace error */ | |
451 | WARN_ON(etnaviv_obj->last_cpu_prep_op == 0); | |
452 | dma_sync_sg_for_device(dev->dev, etnaviv_obj->sgt->sgl, | |
453 | etnaviv_obj->sgt->nents, | |
454 | etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op)); | |
455 | etnaviv_obj->last_cpu_prep_op = 0; | |
456 | } | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj, | |
462 | struct timespec *timeout) | |
463 | { | |
464 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
465 | ||
466 | return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout); | |
467 | } | |
468 | ||
469 | #ifdef CONFIG_DEBUG_FS | |
f54d1867 | 470 | static void etnaviv_gem_describe_fence(struct dma_fence *fence, |
a8c21a54 T |
471 | const char *type, struct seq_file *m) |
472 | { | |
f54d1867 | 473 | if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) |
a8c21a54 T |
474 | seq_printf(m, "\t%9s: %s %s seq %u\n", |
475 | type, | |
476 | fence->ops->get_driver_name(fence), | |
477 | fence->ops->get_timeline_name(fence), | |
478 | fence->seqno); | |
479 | } | |
480 | ||
481 | static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m) | |
482 | { | |
483 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
484 | struct reservation_object *robj = etnaviv_obj->resv; | |
485 | struct reservation_object_list *fobj; | |
f54d1867 | 486 | struct dma_fence *fence; |
a8c21a54 T |
487 | unsigned long off = drm_vma_node_start(&obj->vma_node); |
488 | ||
489 | seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n", | |
490 | etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I', | |
2c935bc5 | 491 | obj->name, kref_read(&obj->refcount), |
a8c21a54 T |
492 | off, etnaviv_obj->vaddr, obj->size); |
493 | ||
494 | rcu_read_lock(); | |
495 | fobj = rcu_dereference(robj->fence); | |
496 | if (fobj) { | |
497 | unsigned int i, shared_count = fobj->shared_count; | |
498 | ||
499 | for (i = 0; i < shared_count; i++) { | |
500 | fence = rcu_dereference(fobj->shared[i]); | |
501 | etnaviv_gem_describe_fence(fence, "Shared", m); | |
502 | } | |
503 | } | |
504 | ||
505 | fence = rcu_dereference(robj->fence_excl); | |
506 | if (fence) | |
507 | etnaviv_gem_describe_fence(fence, "Exclusive", m); | |
508 | rcu_read_unlock(); | |
509 | } | |
510 | ||
511 | void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv, | |
512 | struct seq_file *m) | |
513 | { | |
514 | struct etnaviv_gem_object *etnaviv_obj; | |
515 | int count = 0; | |
516 | size_t size = 0; | |
517 | ||
518 | mutex_lock(&priv->gem_lock); | |
519 | list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) { | |
520 | struct drm_gem_object *obj = &etnaviv_obj->base; | |
521 | ||
522 | seq_puts(m, " "); | |
523 | etnaviv_gem_describe(obj, m); | |
524 | count++; | |
525 | size += obj->size; | |
526 | } | |
527 | mutex_unlock(&priv->gem_lock); | |
528 | ||
529 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
530 | } | |
531 | #endif | |
532 | ||
533 | static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj) | |
534 | { | |
8c6e6188 | 535 | vunmap(etnaviv_obj->vaddr); |
a8c21a54 T |
536 | put_pages(etnaviv_obj); |
537 | } | |
538 | ||
539 | static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = { | |
540 | .get_pages = etnaviv_gem_shmem_get_pages, | |
541 | .release = etnaviv_gem_shmem_release, | |
a0a5ab3e | 542 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 543 | .mmap = etnaviv_gem_mmap_obj, |
a8c21a54 T |
544 | }; |
545 | ||
546 | void etnaviv_gem_free_object(struct drm_gem_object *obj) | |
547 | { | |
548 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
549 | struct etnaviv_vram_mapping *mapping, *tmp; | |
550 | ||
551 | /* object should not be active */ | |
552 | WARN_ON(is_active(etnaviv_obj)); | |
553 | ||
554 | list_del(&etnaviv_obj->gem_node); | |
555 | ||
556 | list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list, | |
557 | obj_node) { | |
558 | struct etnaviv_iommu *mmu = mapping->mmu; | |
559 | ||
560 | WARN_ON(mapping->use); | |
561 | ||
562 | if (mmu) | |
563 | etnaviv_iommu_unmap_gem(mmu, mapping); | |
564 | ||
565 | list_del(&mapping->obj_node); | |
566 | kfree(mapping); | |
567 | } | |
568 | ||
569 | drm_gem_free_mmap_offset(obj); | |
570 | etnaviv_obj->ops->release(etnaviv_obj); | |
571 | if (etnaviv_obj->resv == &etnaviv_obj->_resv) | |
572 | reservation_object_fini(&etnaviv_obj->_resv); | |
573 | drm_gem_object_release(obj); | |
574 | ||
575 | kfree(etnaviv_obj); | |
576 | } | |
577 | ||
578 | int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj) | |
579 | { | |
580 | struct etnaviv_drm_private *priv = dev->dev_private; | |
581 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
582 | ||
583 | mutex_lock(&priv->gem_lock); | |
584 | list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list); | |
585 | mutex_unlock(&priv->gem_lock); | |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
590 | static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags, | |
591 | struct reservation_object *robj, const struct etnaviv_gem_ops *ops, | |
592 | struct drm_gem_object **obj) | |
593 | { | |
594 | struct etnaviv_gem_object *etnaviv_obj; | |
595 | unsigned sz = sizeof(*etnaviv_obj); | |
596 | bool valid = true; | |
597 | ||
598 | /* validate flags */ | |
599 | switch (flags & ETNA_BO_CACHE_MASK) { | |
600 | case ETNA_BO_UNCACHED: | |
601 | case ETNA_BO_CACHED: | |
602 | case ETNA_BO_WC: | |
603 | break; | |
604 | default: | |
605 | valid = false; | |
606 | } | |
607 | ||
608 | if (!valid) { | |
609 | dev_err(dev->dev, "invalid cache flag: %x\n", | |
610 | (flags & ETNA_BO_CACHE_MASK)); | |
611 | return -EINVAL; | |
612 | } | |
613 | ||
614 | etnaviv_obj = kzalloc(sz, GFP_KERNEL); | |
615 | if (!etnaviv_obj) | |
616 | return -ENOMEM; | |
617 | ||
618 | etnaviv_obj->flags = flags; | |
619 | etnaviv_obj->ops = ops; | |
620 | if (robj) { | |
621 | etnaviv_obj->resv = robj; | |
622 | } else { | |
623 | etnaviv_obj->resv = &etnaviv_obj->_resv; | |
624 | reservation_object_init(&etnaviv_obj->_resv); | |
625 | } | |
626 | ||
627 | mutex_init(&etnaviv_obj->lock); | |
628 | INIT_LIST_HEAD(&etnaviv_obj->vram_list); | |
629 | ||
630 | *obj = &etnaviv_obj->base; | |
631 | ||
632 | return 0; | |
633 | } | |
634 | ||
635 | static struct drm_gem_object *__etnaviv_gem_new(struct drm_device *dev, | |
636 | u32 size, u32 flags) | |
637 | { | |
638 | struct drm_gem_object *obj = NULL; | |
639 | int ret; | |
640 | ||
641 | size = PAGE_ALIGN(size); | |
642 | ||
643 | ret = etnaviv_gem_new_impl(dev, size, flags, NULL, | |
644 | &etnaviv_gem_shmem_ops, &obj); | |
645 | if (ret) | |
646 | goto fail; | |
647 | ||
648 | ret = drm_gem_object_init(dev, obj, size); | |
649 | if (ret == 0) { | |
650 | struct address_space *mapping; | |
651 | ||
652 | /* | |
653 | * Our buffers are kept pinned, so allocating them | |
654 | * from the MOVABLE zone is a really bad idea, and | |
655 | * conflicts with CMA. See coments above new_inode() | |
656 | * why this is required _and_ expected if you're | |
657 | * going to pin these pages. | |
658 | */ | |
93c76a3d | 659 | mapping = obj->filp->f_mapping; |
a8c21a54 T |
660 | mapping_set_gfp_mask(mapping, GFP_HIGHUSER); |
661 | } | |
662 | ||
663 | if (ret) | |
664 | goto fail; | |
665 | ||
666 | return obj; | |
667 | ||
668 | fail: | |
8c6e6188 | 669 | drm_gem_object_unreference_unlocked(obj); |
a8c21a54 T |
670 | return ERR_PTR(ret); |
671 | } | |
672 | ||
673 | /* convenience method to construct a GEM buffer object, and userspace handle */ | |
674 | int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
675 | u32 size, u32 flags, u32 *handle) | |
676 | { | |
677 | struct drm_gem_object *obj; | |
678 | int ret; | |
679 | ||
680 | obj = __etnaviv_gem_new(dev, size, flags); | |
681 | if (IS_ERR(obj)) | |
682 | return PTR_ERR(obj); | |
683 | ||
684 | ret = etnaviv_gem_obj_add(dev, obj); | |
685 | if (ret < 0) { | |
686 | drm_gem_object_unreference_unlocked(obj); | |
687 | return ret; | |
688 | } | |
689 | ||
690 | ret = drm_gem_handle_create(file, obj, handle); | |
691 | ||
692 | /* drop reference from allocate - handle holds it now */ | |
693 | drm_gem_object_unreference_unlocked(obj); | |
694 | ||
695 | return ret; | |
696 | } | |
697 | ||
698 | struct drm_gem_object *etnaviv_gem_new(struct drm_device *dev, | |
699 | u32 size, u32 flags) | |
700 | { | |
701 | struct drm_gem_object *obj; | |
702 | int ret; | |
703 | ||
704 | obj = __etnaviv_gem_new(dev, size, flags); | |
705 | if (IS_ERR(obj)) | |
706 | return obj; | |
707 | ||
708 | ret = etnaviv_gem_obj_add(dev, obj); | |
709 | if (ret < 0) { | |
710 | drm_gem_object_unreference_unlocked(obj); | |
711 | return ERR_PTR(ret); | |
712 | } | |
713 | ||
714 | return obj; | |
715 | } | |
716 | ||
717 | int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags, | |
718 | struct reservation_object *robj, const struct etnaviv_gem_ops *ops, | |
719 | struct etnaviv_gem_object **res) | |
720 | { | |
721 | struct drm_gem_object *obj; | |
722 | int ret; | |
723 | ||
724 | ret = etnaviv_gem_new_impl(dev, size, flags, robj, ops, &obj); | |
725 | if (ret) | |
726 | return ret; | |
727 | ||
728 | drm_gem_private_object_init(dev, obj, size); | |
729 | ||
730 | *res = to_etnaviv_bo(obj); | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
735 | struct get_pages_work { | |
736 | struct work_struct work; | |
737 | struct mm_struct *mm; | |
738 | struct task_struct *task; | |
739 | struct etnaviv_gem_object *etnaviv_obj; | |
740 | }; | |
741 | ||
742 | static struct page **etnaviv_gem_userptr_do_get_pages( | |
743 | struct etnaviv_gem_object *etnaviv_obj, struct mm_struct *mm, struct task_struct *task) | |
744 | { | |
745 | int ret = 0, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
746 | struct page **pvec; | |
747 | uintptr_t ptr; | |
9beae1ea | 748 | unsigned int flags = 0; |
a8c21a54 T |
749 | |
750 | pvec = drm_malloc_ab(npages, sizeof(struct page *)); | |
751 | if (!pvec) | |
752 | return ERR_PTR(-ENOMEM); | |
753 | ||
9beae1ea LS |
754 | if (!etnaviv_obj->userptr.ro) |
755 | flags |= FOLL_WRITE; | |
756 | ||
a8c21a54 T |
757 | pinned = 0; |
758 | ptr = etnaviv_obj->userptr.ptr; | |
759 | ||
760 | down_read(&mm->mmap_sem); | |
761 | while (pinned < npages) { | |
1e987790 | 762 | ret = get_user_pages_remote(task, mm, ptr, npages - pinned, |
5b56d49f | 763 | flags, pvec + pinned, NULL, NULL); |
a8c21a54 T |
764 | if (ret < 0) |
765 | break; | |
766 | ||
767 | ptr += ret * PAGE_SIZE; | |
768 | pinned += ret; | |
769 | } | |
770 | up_read(&mm->mmap_sem); | |
771 | ||
772 | if (ret < 0) { | |
773 | release_pages(pvec, pinned, 0); | |
774 | drm_free_large(pvec); | |
775 | return ERR_PTR(ret); | |
776 | } | |
777 | ||
778 | return pvec; | |
779 | } | |
780 | ||
781 | static void __etnaviv_gem_userptr_get_pages(struct work_struct *_work) | |
782 | { | |
783 | struct get_pages_work *work = container_of(_work, typeof(*work), work); | |
784 | struct etnaviv_gem_object *etnaviv_obj = work->etnaviv_obj; | |
785 | struct page **pvec; | |
786 | ||
787 | pvec = etnaviv_gem_userptr_do_get_pages(etnaviv_obj, work->mm, work->task); | |
788 | ||
789 | mutex_lock(&etnaviv_obj->lock); | |
790 | if (IS_ERR(pvec)) { | |
791 | etnaviv_obj->userptr.work = ERR_CAST(pvec); | |
792 | } else { | |
793 | etnaviv_obj->userptr.work = NULL; | |
794 | etnaviv_obj->pages = pvec; | |
795 | } | |
796 | ||
797 | mutex_unlock(&etnaviv_obj->lock); | |
798 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
799 | ||
800 | mmput(work->mm); | |
801 | put_task_struct(work->task); | |
802 | kfree(work); | |
803 | } | |
804 | ||
805 | static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
806 | { | |
807 | struct page **pvec = NULL; | |
808 | struct get_pages_work *work; | |
809 | struct mm_struct *mm; | |
810 | int ret, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
811 | ||
812 | if (etnaviv_obj->userptr.work) { | |
813 | if (IS_ERR(etnaviv_obj->userptr.work)) { | |
814 | ret = PTR_ERR(etnaviv_obj->userptr.work); | |
815 | etnaviv_obj->userptr.work = NULL; | |
816 | } else { | |
817 | ret = -EAGAIN; | |
818 | } | |
819 | return ret; | |
820 | } | |
821 | ||
822 | mm = get_task_mm(etnaviv_obj->userptr.task); | |
823 | pinned = 0; | |
824 | if (mm == current->mm) { | |
825 | pvec = drm_malloc_ab(npages, sizeof(struct page *)); | |
826 | if (!pvec) { | |
827 | mmput(mm); | |
828 | return -ENOMEM; | |
829 | } | |
830 | ||
831 | pinned = __get_user_pages_fast(etnaviv_obj->userptr.ptr, npages, | |
832 | !etnaviv_obj->userptr.ro, pvec); | |
833 | if (pinned < 0) { | |
834 | drm_free_large(pvec); | |
835 | mmput(mm); | |
836 | return pinned; | |
837 | } | |
838 | ||
839 | if (pinned == npages) { | |
840 | etnaviv_obj->pages = pvec; | |
841 | mmput(mm); | |
842 | return 0; | |
843 | } | |
844 | } | |
845 | ||
846 | release_pages(pvec, pinned, 0); | |
847 | drm_free_large(pvec); | |
848 | ||
849 | work = kmalloc(sizeof(*work), GFP_KERNEL); | |
850 | if (!work) { | |
851 | mmput(mm); | |
852 | return -ENOMEM; | |
853 | } | |
854 | ||
855 | get_task_struct(current); | |
856 | drm_gem_object_reference(&etnaviv_obj->base); | |
857 | ||
858 | work->mm = mm; | |
859 | work->task = current; | |
860 | work->etnaviv_obj = etnaviv_obj; | |
861 | ||
862 | etnaviv_obj->userptr.work = &work->work; | |
863 | INIT_WORK(&work->work, __etnaviv_gem_userptr_get_pages); | |
864 | ||
865 | etnaviv_queue_work(etnaviv_obj->base.dev, &work->work); | |
866 | ||
867 | return -EAGAIN; | |
868 | } | |
869 | ||
870 | static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj) | |
871 | { | |
872 | if (etnaviv_obj->sgt) { | |
873 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
874 | sg_free_table(etnaviv_obj->sgt); | |
875 | kfree(etnaviv_obj->sgt); | |
876 | } | |
877 | if (etnaviv_obj->pages) { | |
878 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
879 | ||
880 | release_pages(etnaviv_obj->pages, npages, 0); | |
881 | drm_free_large(etnaviv_obj->pages); | |
882 | } | |
883 | put_task_struct(etnaviv_obj->userptr.task); | |
884 | } | |
885 | ||
a10e2bde LS |
886 | static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
887 | struct vm_area_struct *vma) | |
888 | { | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
a8c21a54 T |
892 | static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = { |
893 | .get_pages = etnaviv_gem_userptr_get_pages, | |
894 | .release = etnaviv_gem_userptr_release, | |
a0a5ab3e | 895 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 896 | .mmap = etnaviv_gem_userptr_mmap_obj, |
a8c21a54 T |
897 | }; |
898 | ||
899 | int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file, | |
900 | uintptr_t ptr, u32 size, u32 flags, u32 *handle) | |
901 | { | |
902 | struct etnaviv_gem_object *etnaviv_obj; | |
903 | int ret; | |
904 | ||
905 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, NULL, | |
906 | &etnaviv_gem_userptr_ops, &etnaviv_obj); | |
907 | if (ret) | |
908 | return ret; | |
909 | ||
910 | etnaviv_obj->userptr.ptr = ptr; | |
911 | etnaviv_obj->userptr.task = current; | |
912 | etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE); | |
913 | get_task_struct(current); | |
914 | ||
915 | ret = etnaviv_gem_obj_add(dev, &etnaviv_obj->base); | |
d9a7ed77 ME |
916 | if (ret) |
917 | goto unreference; | |
a8c21a54 T |
918 | |
919 | ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle); | |
d9a7ed77 | 920 | unreference: |
a8c21a54 T |
921 | /* drop reference from allocate - handle holds it now */ |
922 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
a8c21a54 T |
923 | return ret; |
924 | } |