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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> |
0881e7bd | 20 | #include <linux/sched/task.h> |
a8c21a54 T |
21 | |
22 | #include "etnaviv_drv.h" | |
23 | #include "etnaviv_gem.h" | |
24 | #include "etnaviv_gpu.h" | |
25 | #include "etnaviv_mmu.h" | |
26 | ||
27 | static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj) | |
28 | { | |
29 | struct drm_device *dev = etnaviv_obj->base.dev; | |
30 | struct sg_table *sgt = etnaviv_obj->sgt; | |
31 | ||
32 | /* | |
33 | * For non-cached buffers, ensure the new pages are clean | |
34 | * because display controller, GPU, etc. are not coherent. | |
35 | */ | |
36 | if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) | |
37 | dma_map_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL); | |
38 | } | |
39 | ||
40 | static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj) | |
41 | { | |
42 | struct drm_device *dev = etnaviv_obj->base.dev; | |
43 | struct sg_table *sgt = etnaviv_obj->sgt; | |
44 | ||
45 | /* | |
46 | * For non-cached buffers, ensure the new pages are clean | |
47 | * because display controller, GPU, etc. are not coherent: | |
48 | * | |
49 | * WARNING: The DMA API does not support concurrent CPU | |
50 | * and device access to the memory area. With BIDIRECTIONAL, | |
51 | * we will clean the cache lines which overlap the region, | |
52 | * and invalidate all cache lines (partially) contained in | |
53 | * the region. | |
54 | * | |
55 | * If you have dirty data in the overlapping cache lines, | |
56 | * that will corrupt the GPU-written data. If you have | |
57 | * written into the remainder of the region, this can | |
58 | * discard those writes. | |
59 | */ | |
60 | if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) | |
61 | dma_unmap_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL); | |
62 | } | |
63 | ||
64 | /* called with etnaviv_obj->lock held */ | |
65 | static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
66 | { | |
67 | struct drm_device *dev = etnaviv_obj->base.dev; | |
68 | struct page **p = drm_gem_get_pages(&etnaviv_obj->base); | |
69 | ||
70 | if (IS_ERR(p)) { | |
71 | dev_err(dev->dev, "could not get pages: %ld\n", PTR_ERR(p)); | |
72 | return PTR_ERR(p); | |
73 | } | |
74 | ||
75 | etnaviv_obj->pages = p; | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | static void put_pages(struct etnaviv_gem_object *etnaviv_obj) | |
81 | { | |
82 | if (etnaviv_obj->sgt) { | |
83 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
84 | sg_free_table(etnaviv_obj->sgt); | |
85 | kfree(etnaviv_obj->sgt); | |
86 | etnaviv_obj->sgt = NULL; | |
87 | } | |
88 | if (etnaviv_obj->pages) { | |
89 | drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages, | |
90 | true, false); | |
91 | ||
92 | etnaviv_obj->pages = NULL; | |
93 | } | |
94 | } | |
95 | ||
96 | struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
97 | { | |
98 | int ret; | |
99 | ||
100 | lockdep_assert_held(&etnaviv_obj->lock); | |
101 | ||
102 | if (!etnaviv_obj->pages) { | |
103 | ret = etnaviv_obj->ops->get_pages(etnaviv_obj); | |
104 | if (ret < 0) | |
105 | return ERR_PTR(ret); | |
106 | } | |
107 | ||
108 | if (!etnaviv_obj->sgt) { | |
109 | struct drm_device *dev = etnaviv_obj->base.dev; | |
110 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
111 | struct sg_table *sgt; | |
112 | ||
113 | sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages); | |
114 | if (IS_ERR(sgt)) { | |
115 | dev_err(dev->dev, "failed to allocate sgt: %ld\n", | |
116 | PTR_ERR(sgt)); | |
117 | return ERR_CAST(sgt); | |
118 | } | |
119 | ||
120 | etnaviv_obj->sgt = sgt; | |
121 | ||
122 | etnaviv_gem_scatter_map(etnaviv_obj); | |
123 | } | |
124 | ||
125 | return etnaviv_obj->pages; | |
126 | } | |
127 | ||
128 | void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj) | |
129 | { | |
130 | lockdep_assert_held(&etnaviv_obj->lock); | |
131 | /* when we start tracking the pin count, then do something here */ | |
132 | } | |
133 | ||
0e7f26e6 | 134 | static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
a8c21a54 T |
135 | struct vm_area_struct *vma) |
136 | { | |
a8c21a54 T |
137 | pgprot_t vm_page_prot; |
138 | ||
139 | vma->vm_flags &= ~VM_PFNMAP; | |
140 | vma->vm_flags |= VM_MIXEDMAP; | |
141 | ||
142 | vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
143 | ||
144 | if (etnaviv_obj->flags & ETNA_BO_WC) { | |
145 | vma->vm_page_prot = pgprot_writecombine(vm_page_prot); | |
146 | } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) { | |
147 | vma->vm_page_prot = pgprot_noncached(vm_page_prot); | |
148 | } else { | |
149 | /* | |
150 | * Shunt off cached objs to shmem file so they have their own | |
151 | * address_space (so unmap_mapping_range does what we want, | |
152 | * in particular in the case of mmap'd dmabufs) | |
153 | */ | |
154 | fput(vma->vm_file); | |
0e7f26e6 | 155 | get_file(etnaviv_obj->base.filp); |
a8c21a54 | 156 | vma->vm_pgoff = 0; |
0e7f26e6 | 157 | vma->vm_file = etnaviv_obj->base.filp; |
a8c21a54 T |
158 | |
159 | vma->vm_page_prot = vm_page_prot; | |
160 | } | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
166 | { | |
167 | struct etnaviv_gem_object *obj; | |
168 | int ret; | |
169 | ||
170 | ret = drm_gem_mmap(filp, vma); | |
171 | if (ret) { | |
172 | DBG("mmap failed: %d", ret); | |
173 | return ret; | |
174 | } | |
175 | ||
176 | obj = to_etnaviv_bo(vma->vm_private_data); | |
a10e2bde | 177 | return obj->ops->mmap(obj, vma); |
a8c21a54 T |
178 | } |
179 | ||
11bac800 | 180 | int etnaviv_gem_fault(struct vm_fault *vmf) |
a8c21a54 | 181 | { |
11bac800 | 182 | struct vm_area_struct *vma = vmf->vma; |
a8c21a54 T |
183 | struct drm_gem_object *obj = vma->vm_private_data; |
184 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
185 | struct page **pages, *page; | |
186 | pgoff_t pgoff; | |
187 | int ret; | |
188 | ||
189 | /* | |
190 | * Make sure we don't parallel update on a fault, nor move or remove | |
191 | * something from beneath our feet. Note that vm_insert_page() is | |
192 | * specifically coded to take care of this, so we don't have to. | |
193 | */ | |
194 | ret = mutex_lock_interruptible(&etnaviv_obj->lock); | |
195 | if (ret) | |
196 | goto out; | |
197 | ||
198 | /* make sure we have pages attached now */ | |
199 | pages = etnaviv_gem_get_pages(etnaviv_obj); | |
200 | mutex_unlock(&etnaviv_obj->lock); | |
201 | ||
202 | if (IS_ERR(pages)) { | |
203 | ret = PTR_ERR(pages); | |
204 | goto out; | |
205 | } | |
206 | ||
207 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
1a29d85e | 208 | pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
a8c21a54 T |
209 | |
210 | page = pages[pgoff]; | |
211 | ||
1a29d85e | 212 | VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, |
a8c21a54 T |
213 | page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT); |
214 | ||
1a29d85e | 215 | ret = vm_insert_page(vma, vmf->address, page); |
a8c21a54 T |
216 | |
217 | out: | |
218 | switch (ret) { | |
219 | case -EAGAIN: | |
220 | case 0: | |
221 | case -ERESTARTSYS: | |
222 | case -EINTR: | |
223 | case -EBUSY: | |
224 | /* | |
225 | * EBUSY is ok: this just means that another thread | |
226 | * already did the job. | |
227 | */ | |
228 | return VM_FAULT_NOPAGE; | |
229 | case -ENOMEM: | |
230 | return VM_FAULT_OOM; | |
231 | default: | |
232 | return VM_FAULT_SIGBUS; | |
233 | } | |
234 | } | |
235 | ||
236 | int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset) | |
237 | { | |
238 | int ret; | |
239 | ||
240 | /* Make it mmapable */ | |
241 | ret = drm_gem_create_mmap_offset(obj); | |
242 | if (ret) | |
243 | dev_err(obj->dev->dev, "could not allocate mmap offset\n"); | |
244 | else | |
245 | *offset = drm_vma_node_offset_addr(&obj->vma_node); | |
246 | ||
247 | return ret; | |
248 | } | |
249 | ||
250 | static struct etnaviv_vram_mapping * | |
251 | etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj, | |
252 | struct etnaviv_iommu *mmu) | |
253 | { | |
254 | struct etnaviv_vram_mapping *mapping; | |
255 | ||
256 | list_for_each_entry(mapping, &obj->vram_list, obj_node) { | |
257 | if (mapping->mmu == mmu) | |
258 | return mapping; | |
259 | } | |
260 | ||
261 | return NULL; | |
262 | } | |
263 | ||
b6325f40 RK |
264 | void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping) |
265 | { | |
266 | struct etnaviv_gem_object *etnaviv_obj = mapping->object; | |
267 | ||
268 | drm_gem_object_reference(&etnaviv_obj->base); | |
269 | ||
270 | mutex_lock(&etnaviv_obj->lock); | |
271 | WARN_ON(mapping->use == 0); | |
272 | mapping->use += 1; | |
273 | mutex_unlock(&etnaviv_obj->lock); | |
274 | } | |
275 | ||
276 | void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) | |
277 | { | |
278 | struct etnaviv_gem_object *etnaviv_obj = mapping->object; | |
279 | ||
280 | mutex_lock(&etnaviv_obj->lock); | |
281 | WARN_ON(mapping->use == 0); | |
282 | mapping->use -= 1; | |
283 | mutex_unlock(&etnaviv_obj->lock); | |
284 | ||
285 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
286 | } | |
287 | ||
288 | struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( | |
289 | struct drm_gem_object *obj, struct etnaviv_gpu *gpu) | |
a8c21a54 T |
290 | { |
291 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
292 | struct etnaviv_vram_mapping *mapping; | |
293 | struct page **pages; | |
294 | int ret = 0; | |
295 | ||
296 | mutex_lock(&etnaviv_obj->lock); | |
297 | mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, gpu->mmu); | |
298 | if (mapping) { | |
299 | /* | |
300 | * Holding the object lock prevents the use count changing | |
301 | * beneath us. If the use count is zero, the MMU might be | |
302 | * reaping this object, so take the lock and re-check that | |
303 | * the MMU owns this mapping to close this race. | |
304 | */ | |
305 | if (mapping->use == 0) { | |
306 | mutex_lock(&gpu->mmu->lock); | |
307 | if (mapping->mmu == gpu->mmu) | |
308 | mapping->use += 1; | |
309 | else | |
310 | mapping = NULL; | |
311 | mutex_unlock(&gpu->mmu->lock); | |
312 | if (mapping) | |
313 | goto out; | |
314 | } else { | |
315 | mapping->use += 1; | |
316 | goto out; | |
317 | } | |
318 | } | |
319 | ||
320 | pages = etnaviv_gem_get_pages(etnaviv_obj); | |
321 | if (IS_ERR(pages)) { | |
322 | ret = PTR_ERR(pages); | |
323 | goto out; | |
324 | } | |
325 | ||
326 | /* | |
327 | * See if we have a reaped vram mapping we can re-use before | |
328 | * allocating a fresh mapping. | |
329 | */ | |
330 | mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL); | |
331 | if (!mapping) { | |
332 | mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); | |
ed94add0 DC |
333 | if (!mapping) { |
334 | ret = -ENOMEM; | |
335 | goto out; | |
336 | } | |
a8c21a54 T |
337 | |
338 | INIT_LIST_HEAD(&mapping->scan_node); | |
339 | mapping->object = etnaviv_obj; | |
340 | } else { | |
341 | list_del(&mapping->obj_node); | |
342 | } | |
343 | ||
344 | mapping->mmu = gpu->mmu; | |
345 | mapping->use = 1; | |
346 | ||
347 | ret = etnaviv_iommu_map_gem(gpu->mmu, etnaviv_obj, gpu->memory_base, | |
348 | mapping); | |
349 | if (ret < 0) | |
350 | kfree(mapping); | |
351 | else | |
352 | list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list); | |
353 | ||
354 | out: | |
355 | mutex_unlock(&etnaviv_obj->lock); | |
356 | ||
b6325f40 RK |
357 | if (ret) |
358 | return ERR_PTR(ret); | |
a8c21a54 | 359 | |
b6325f40 RK |
360 | /* Take a reference on the object */ |
361 | drm_gem_object_reference(obj); | |
362 | return mapping; | |
a8c21a54 T |
363 | } |
364 | ||
ce3088fd | 365 | void *etnaviv_gem_vmap(struct drm_gem_object *obj) |
a8c21a54 T |
366 | { |
367 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
368 | ||
a0a5ab3e LS |
369 | if (etnaviv_obj->vaddr) |
370 | return etnaviv_obj->vaddr; | |
a8c21a54 | 371 | |
a0a5ab3e LS |
372 | mutex_lock(&etnaviv_obj->lock); |
373 | /* | |
374 | * Need to check again, as we might have raced with another thread | |
375 | * while waiting for the mutex. | |
376 | */ | |
377 | if (!etnaviv_obj->vaddr) | |
378 | etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj); | |
a8c21a54 T |
379 | mutex_unlock(&etnaviv_obj->lock); |
380 | ||
381 | return etnaviv_obj->vaddr; | |
382 | } | |
383 | ||
a0a5ab3e LS |
384 | static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj) |
385 | { | |
386 | struct page **pages; | |
387 | ||
388 | lockdep_assert_held(&obj->lock); | |
389 | ||
390 | pages = etnaviv_gem_get_pages(obj); | |
391 | if (IS_ERR(pages)) | |
392 | return NULL; | |
393 | ||
394 | return vmap(pages, obj->base.size >> PAGE_SHIFT, | |
395 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
396 | } | |
397 | ||
a8c21a54 T |
398 | static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op) |
399 | { | |
400 | if (op & ETNA_PREP_READ) | |
401 | return DMA_FROM_DEVICE; | |
402 | else if (op & ETNA_PREP_WRITE) | |
403 | return DMA_TO_DEVICE; | |
404 | else | |
405 | return DMA_BIDIRECTIONAL; | |
406 | } | |
407 | ||
408 | int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op, | |
409 | struct timespec *timeout) | |
410 | { | |
411 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
412 | struct drm_device *dev = obj->dev; | |
413 | bool write = !!(op & ETNA_PREP_WRITE); | |
cd34db4a CW |
414 | unsigned long remain = |
415 | op & ETNA_PREP_NOSYNC ? 0 : etnaviv_timeout_to_jiffies(timeout); | |
416 | long lret; | |
417 | ||
418 | lret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv, | |
419 | write, true, remain); | |
420 | if (lret < 0) | |
421 | return lret; | |
422 | else if (lret == 0) | |
423 | return remain == 0 ? -EBUSY : -ETIMEDOUT; | |
a8c21a54 T |
424 | |
425 | if (etnaviv_obj->flags & ETNA_BO_CACHED) { | |
426 | if (!etnaviv_obj->sgt) { | |
427 | void *ret; | |
428 | ||
429 | mutex_lock(&etnaviv_obj->lock); | |
430 | ret = etnaviv_gem_get_pages(etnaviv_obj); | |
431 | mutex_unlock(&etnaviv_obj->lock); | |
432 | if (IS_ERR(ret)) | |
433 | return PTR_ERR(ret); | |
434 | } | |
435 | ||
436 | dma_sync_sg_for_cpu(dev->dev, etnaviv_obj->sgt->sgl, | |
437 | etnaviv_obj->sgt->nents, | |
438 | etnaviv_op_to_dma_dir(op)); | |
439 | etnaviv_obj->last_cpu_prep_op = op; | |
440 | } | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
445 | int etnaviv_gem_cpu_fini(struct drm_gem_object *obj) | |
446 | { | |
447 | struct drm_device *dev = obj->dev; | |
448 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
449 | ||
450 | if (etnaviv_obj->flags & ETNA_BO_CACHED) { | |
451 | /* fini without a prep is almost certainly a userspace error */ | |
452 | WARN_ON(etnaviv_obj->last_cpu_prep_op == 0); | |
453 | dma_sync_sg_for_device(dev->dev, etnaviv_obj->sgt->sgl, | |
454 | etnaviv_obj->sgt->nents, | |
455 | etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op)); | |
456 | etnaviv_obj->last_cpu_prep_op = 0; | |
457 | } | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj, | |
463 | struct timespec *timeout) | |
464 | { | |
465 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
466 | ||
467 | return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout); | |
468 | } | |
469 | ||
470 | #ifdef CONFIG_DEBUG_FS | |
f54d1867 | 471 | static void etnaviv_gem_describe_fence(struct dma_fence *fence, |
a8c21a54 T |
472 | const char *type, struct seq_file *m) |
473 | { | |
f54d1867 | 474 | if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) |
a8c21a54 T |
475 | seq_printf(m, "\t%9s: %s %s seq %u\n", |
476 | type, | |
477 | fence->ops->get_driver_name(fence), | |
478 | fence->ops->get_timeline_name(fence), | |
479 | fence->seqno); | |
480 | } | |
481 | ||
482 | static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m) | |
483 | { | |
484 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
485 | struct reservation_object *robj = etnaviv_obj->resv; | |
486 | struct reservation_object_list *fobj; | |
f54d1867 | 487 | struct dma_fence *fence; |
a8c21a54 T |
488 | unsigned long off = drm_vma_node_start(&obj->vma_node); |
489 | ||
490 | seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n", | |
491 | etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I', | |
2c935bc5 | 492 | obj->name, kref_read(&obj->refcount), |
a8c21a54 T |
493 | off, etnaviv_obj->vaddr, obj->size); |
494 | ||
495 | rcu_read_lock(); | |
496 | fobj = rcu_dereference(robj->fence); | |
497 | if (fobj) { | |
498 | unsigned int i, shared_count = fobj->shared_count; | |
499 | ||
500 | for (i = 0; i < shared_count; i++) { | |
501 | fence = rcu_dereference(fobj->shared[i]); | |
502 | etnaviv_gem_describe_fence(fence, "Shared", m); | |
503 | } | |
504 | } | |
505 | ||
506 | fence = rcu_dereference(robj->fence_excl); | |
507 | if (fence) | |
508 | etnaviv_gem_describe_fence(fence, "Exclusive", m); | |
509 | rcu_read_unlock(); | |
510 | } | |
511 | ||
512 | void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv, | |
513 | struct seq_file *m) | |
514 | { | |
515 | struct etnaviv_gem_object *etnaviv_obj; | |
516 | int count = 0; | |
517 | size_t size = 0; | |
518 | ||
519 | mutex_lock(&priv->gem_lock); | |
520 | list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) { | |
521 | struct drm_gem_object *obj = &etnaviv_obj->base; | |
522 | ||
523 | seq_puts(m, " "); | |
524 | etnaviv_gem_describe(obj, m); | |
525 | count++; | |
526 | size += obj->size; | |
527 | } | |
528 | mutex_unlock(&priv->gem_lock); | |
529 | ||
530 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
531 | } | |
532 | #endif | |
533 | ||
534 | static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj) | |
535 | { | |
8c6e6188 | 536 | vunmap(etnaviv_obj->vaddr); |
a8c21a54 T |
537 | put_pages(etnaviv_obj); |
538 | } | |
539 | ||
540 | static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = { | |
541 | .get_pages = etnaviv_gem_shmem_get_pages, | |
542 | .release = etnaviv_gem_shmem_release, | |
a0a5ab3e | 543 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 544 | .mmap = etnaviv_gem_mmap_obj, |
a8c21a54 T |
545 | }; |
546 | ||
547 | void etnaviv_gem_free_object(struct drm_gem_object *obj) | |
548 | { | |
549 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
550 | struct etnaviv_vram_mapping *mapping, *tmp; | |
551 | ||
552 | /* object should not be active */ | |
553 | WARN_ON(is_active(etnaviv_obj)); | |
554 | ||
555 | list_del(&etnaviv_obj->gem_node); | |
556 | ||
557 | list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list, | |
558 | obj_node) { | |
559 | struct etnaviv_iommu *mmu = mapping->mmu; | |
560 | ||
561 | WARN_ON(mapping->use); | |
562 | ||
563 | if (mmu) | |
564 | etnaviv_iommu_unmap_gem(mmu, mapping); | |
565 | ||
566 | list_del(&mapping->obj_node); | |
567 | kfree(mapping); | |
568 | } | |
569 | ||
570 | drm_gem_free_mmap_offset(obj); | |
571 | etnaviv_obj->ops->release(etnaviv_obj); | |
572 | if (etnaviv_obj->resv == &etnaviv_obj->_resv) | |
573 | reservation_object_fini(&etnaviv_obj->_resv); | |
574 | drm_gem_object_release(obj); | |
575 | ||
576 | kfree(etnaviv_obj); | |
577 | } | |
578 | ||
579 | int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj) | |
580 | { | |
581 | struct etnaviv_drm_private *priv = dev->dev_private; | |
582 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
583 | ||
584 | mutex_lock(&priv->gem_lock); | |
585 | list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list); | |
586 | mutex_unlock(&priv->gem_lock); | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
591 | static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags, | |
592 | struct reservation_object *robj, const struct etnaviv_gem_ops *ops, | |
593 | struct drm_gem_object **obj) | |
594 | { | |
595 | struct etnaviv_gem_object *etnaviv_obj; | |
596 | unsigned sz = sizeof(*etnaviv_obj); | |
597 | bool valid = true; | |
598 | ||
599 | /* validate flags */ | |
600 | switch (flags & ETNA_BO_CACHE_MASK) { | |
601 | case ETNA_BO_UNCACHED: | |
602 | case ETNA_BO_CACHED: | |
603 | case ETNA_BO_WC: | |
604 | break; | |
605 | default: | |
606 | valid = false; | |
607 | } | |
608 | ||
609 | if (!valid) { | |
610 | dev_err(dev->dev, "invalid cache flag: %x\n", | |
611 | (flags & ETNA_BO_CACHE_MASK)); | |
612 | return -EINVAL; | |
613 | } | |
614 | ||
615 | etnaviv_obj = kzalloc(sz, GFP_KERNEL); | |
616 | if (!etnaviv_obj) | |
617 | return -ENOMEM; | |
618 | ||
619 | etnaviv_obj->flags = flags; | |
620 | etnaviv_obj->ops = ops; | |
621 | if (robj) { | |
622 | etnaviv_obj->resv = robj; | |
623 | } else { | |
624 | etnaviv_obj->resv = &etnaviv_obj->_resv; | |
625 | reservation_object_init(&etnaviv_obj->_resv); | |
626 | } | |
627 | ||
628 | mutex_init(&etnaviv_obj->lock); | |
629 | INIT_LIST_HEAD(&etnaviv_obj->vram_list); | |
630 | ||
631 | *obj = &etnaviv_obj->base; | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | static struct drm_gem_object *__etnaviv_gem_new(struct drm_device *dev, | |
637 | u32 size, u32 flags) | |
638 | { | |
639 | struct drm_gem_object *obj = NULL; | |
640 | int ret; | |
641 | ||
642 | size = PAGE_ALIGN(size); | |
643 | ||
644 | ret = etnaviv_gem_new_impl(dev, size, flags, NULL, | |
645 | &etnaviv_gem_shmem_ops, &obj); | |
646 | if (ret) | |
647 | goto fail; | |
648 | ||
649 | ret = drm_gem_object_init(dev, obj, size); | |
650 | if (ret == 0) { | |
651 | struct address_space *mapping; | |
652 | ||
653 | /* | |
654 | * Our buffers are kept pinned, so allocating them | |
655 | * from the MOVABLE zone is a really bad idea, and | |
656 | * conflicts with CMA. See coments above new_inode() | |
657 | * why this is required _and_ expected if you're | |
658 | * going to pin these pages. | |
659 | */ | |
93c76a3d | 660 | mapping = obj->filp->f_mapping; |
a8c21a54 T |
661 | mapping_set_gfp_mask(mapping, GFP_HIGHUSER); |
662 | } | |
663 | ||
664 | if (ret) | |
665 | goto fail; | |
666 | ||
667 | return obj; | |
668 | ||
669 | fail: | |
8c6e6188 | 670 | drm_gem_object_unreference_unlocked(obj); |
a8c21a54 T |
671 | return ERR_PTR(ret); |
672 | } | |
673 | ||
674 | /* convenience method to construct a GEM buffer object, and userspace handle */ | |
675 | int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
676 | u32 size, u32 flags, u32 *handle) | |
677 | { | |
678 | struct drm_gem_object *obj; | |
679 | int ret; | |
680 | ||
681 | obj = __etnaviv_gem_new(dev, size, flags); | |
682 | if (IS_ERR(obj)) | |
683 | return PTR_ERR(obj); | |
684 | ||
685 | ret = etnaviv_gem_obj_add(dev, obj); | |
686 | if (ret < 0) { | |
687 | drm_gem_object_unreference_unlocked(obj); | |
688 | return ret; | |
689 | } | |
690 | ||
691 | ret = drm_gem_handle_create(file, obj, handle); | |
692 | ||
693 | /* drop reference from allocate - handle holds it now */ | |
694 | drm_gem_object_unreference_unlocked(obj); | |
695 | ||
696 | return ret; | |
697 | } | |
698 | ||
699 | struct drm_gem_object *etnaviv_gem_new(struct drm_device *dev, | |
700 | u32 size, u32 flags) | |
701 | { | |
702 | struct drm_gem_object *obj; | |
703 | int ret; | |
704 | ||
705 | obj = __etnaviv_gem_new(dev, size, flags); | |
706 | if (IS_ERR(obj)) | |
707 | return obj; | |
708 | ||
709 | ret = etnaviv_gem_obj_add(dev, obj); | |
710 | if (ret < 0) { | |
711 | drm_gem_object_unreference_unlocked(obj); | |
712 | return ERR_PTR(ret); | |
713 | } | |
714 | ||
715 | return obj; | |
716 | } | |
717 | ||
718 | int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags, | |
719 | struct reservation_object *robj, const struct etnaviv_gem_ops *ops, | |
720 | struct etnaviv_gem_object **res) | |
721 | { | |
722 | struct drm_gem_object *obj; | |
723 | int ret; | |
724 | ||
725 | ret = etnaviv_gem_new_impl(dev, size, flags, robj, ops, &obj); | |
726 | if (ret) | |
727 | return ret; | |
728 | ||
729 | drm_gem_private_object_init(dev, obj, size); | |
730 | ||
731 | *res = to_etnaviv_bo(obj); | |
732 | ||
733 | return 0; | |
734 | } | |
735 | ||
736 | struct get_pages_work { | |
737 | struct work_struct work; | |
738 | struct mm_struct *mm; | |
739 | struct task_struct *task; | |
740 | struct etnaviv_gem_object *etnaviv_obj; | |
741 | }; | |
742 | ||
743 | static struct page **etnaviv_gem_userptr_do_get_pages( | |
744 | struct etnaviv_gem_object *etnaviv_obj, struct mm_struct *mm, struct task_struct *task) | |
745 | { | |
746 | int ret = 0, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
747 | struct page **pvec; | |
748 | uintptr_t ptr; | |
9beae1ea | 749 | unsigned int flags = 0; |
a8c21a54 T |
750 | |
751 | pvec = drm_malloc_ab(npages, sizeof(struct page *)); | |
752 | if (!pvec) | |
753 | return ERR_PTR(-ENOMEM); | |
754 | ||
9beae1ea LS |
755 | if (!etnaviv_obj->userptr.ro) |
756 | flags |= FOLL_WRITE; | |
757 | ||
a8c21a54 T |
758 | pinned = 0; |
759 | ptr = etnaviv_obj->userptr.ptr; | |
760 | ||
761 | down_read(&mm->mmap_sem); | |
762 | while (pinned < npages) { | |
1e987790 | 763 | ret = get_user_pages_remote(task, mm, ptr, npages - pinned, |
5b56d49f | 764 | flags, pvec + pinned, NULL, NULL); |
a8c21a54 T |
765 | if (ret < 0) |
766 | break; | |
767 | ||
768 | ptr += ret * PAGE_SIZE; | |
769 | pinned += ret; | |
770 | } | |
771 | up_read(&mm->mmap_sem); | |
772 | ||
773 | if (ret < 0) { | |
774 | release_pages(pvec, pinned, 0); | |
775 | drm_free_large(pvec); | |
776 | return ERR_PTR(ret); | |
777 | } | |
778 | ||
779 | return pvec; | |
780 | } | |
781 | ||
782 | static void __etnaviv_gem_userptr_get_pages(struct work_struct *_work) | |
783 | { | |
784 | struct get_pages_work *work = container_of(_work, typeof(*work), work); | |
785 | struct etnaviv_gem_object *etnaviv_obj = work->etnaviv_obj; | |
786 | struct page **pvec; | |
787 | ||
788 | pvec = etnaviv_gem_userptr_do_get_pages(etnaviv_obj, work->mm, work->task); | |
789 | ||
790 | mutex_lock(&etnaviv_obj->lock); | |
791 | if (IS_ERR(pvec)) { | |
792 | etnaviv_obj->userptr.work = ERR_CAST(pvec); | |
793 | } else { | |
794 | etnaviv_obj->userptr.work = NULL; | |
795 | etnaviv_obj->pages = pvec; | |
796 | } | |
797 | ||
798 | mutex_unlock(&etnaviv_obj->lock); | |
799 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
800 | ||
801 | mmput(work->mm); | |
802 | put_task_struct(work->task); | |
803 | kfree(work); | |
804 | } | |
805 | ||
806 | static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
807 | { | |
808 | struct page **pvec = NULL; | |
809 | struct get_pages_work *work; | |
810 | struct mm_struct *mm; | |
811 | int ret, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
812 | ||
813 | if (etnaviv_obj->userptr.work) { | |
814 | if (IS_ERR(etnaviv_obj->userptr.work)) { | |
815 | ret = PTR_ERR(etnaviv_obj->userptr.work); | |
816 | etnaviv_obj->userptr.work = NULL; | |
817 | } else { | |
818 | ret = -EAGAIN; | |
819 | } | |
820 | return ret; | |
821 | } | |
822 | ||
823 | mm = get_task_mm(etnaviv_obj->userptr.task); | |
824 | pinned = 0; | |
825 | if (mm == current->mm) { | |
826 | pvec = drm_malloc_ab(npages, sizeof(struct page *)); | |
827 | if (!pvec) { | |
828 | mmput(mm); | |
829 | return -ENOMEM; | |
830 | } | |
831 | ||
832 | pinned = __get_user_pages_fast(etnaviv_obj->userptr.ptr, npages, | |
833 | !etnaviv_obj->userptr.ro, pvec); | |
834 | if (pinned < 0) { | |
835 | drm_free_large(pvec); | |
836 | mmput(mm); | |
837 | return pinned; | |
838 | } | |
839 | ||
840 | if (pinned == npages) { | |
841 | etnaviv_obj->pages = pvec; | |
842 | mmput(mm); | |
843 | return 0; | |
844 | } | |
845 | } | |
846 | ||
847 | release_pages(pvec, pinned, 0); | |
848 | drm_free_large(pvec); | |
849 | ||
850 | work = kmalloc(sizeof(*work), GFP_KERNEL); | |
851 | if (!work) { | |
852 | mmput(mm); | |
853 | return -ENOMEM; | |
854 | } | |
855 | ||
856 | get_task_struct(current); | |
857 | drm_gem_object_reference(&etnaviv_obj->base); | |
858 | ||
859 | work->mm = mm; | |
860 | work->task = current; | |
861 | work->etnaviv_obj = etnaviv_obj; | |
862 | ||
863 | etnaviv_obj->userptr.work = &work->work; | |
864 | INIT_WORK(&work->work, __etnaviv_gem_userptr_get_pages); | |
865 | ||
866 | etnaviv_queue_work(etnaviv_obj->base.dev, &work->work); | |
867 | ||
868 | return -EAGAIN; | |
869 | } | |
870 | ||
871 | static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj) | |
872 | { | |
873 | if (etnaviv_obj->sgt) { | |
874 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
875 | sg_free_table(etnaviv_obj->sgt); | |
876 | kfree(etnaviv_obj->sgt); | |
877 | } | |
878 | if (etnaviv_obj->pages) { | |
879 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
880 | ||
881 | release_pages(etnaviv_obj->pages, npages, 0); | |
882 | drm_free_large(etnaviv_obj->pages); | |
883 | } | |
884 | put_task_struct(etnaviv_obj->userptr.task); | |
885 | } | |
886 | ||
a10e2bde LS |
887 | static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
888 | struct vm_area_struct *vma) | |
889 | { | |
890 | return -EINVAL; | |
891 | } | |
892 | ||
a8c21a54 T |
893 | static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = { |
894 | .get_pages = etnaviv_gem_userptr_get_pages, | |
895 | .release = etnaviv_gem_userptr_release, | |
a0a5ab3e | 896 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 897 | .mmap = etnaviv_gem_userptr_mmap_obj, |
a8c21a54 T |
898 | }; |
899 | ||
900 | int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file, | |
901 | uintptr_t ptr, u32 size, u32 flags, u32 *handle) | |
902 | { | |
903 | struct etnaviv_gem_object *etnaviv_obj; | |
904 | int ret; | |
905 | ||
906 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, NULL, | |
907 | &etnaviv_gem_userptr_ops, &etnaviv_obj); | |
908 | if (ret) | |
909 | return ret; | |
910 | ||
911 | etnaviv_obj->userptr.ptr = ptr; | |
912 | etnaviv_obj->userptr.task = current; | |
913 | etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE); | |
914 | get_task_struct(current); | |
915 | ||
916 | ret = etnaviv_gem_obj_add(dev, &etnaviv_obj->base); | |
d9a7ed77 ME |
917 | if (ret) |
918 | goto unreference; | |
a8c21a54 T |
919 | |
920 | ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle); | |
d9a7ed77 | 921 | unreference: |
a8c21a54 T |
922 | /* drop reference from allocate - handle holds it now */ |
923 | drm_gem_object_unreference_unlocked(&etnaviv_obj->base); | |
a8c21a54 T |
924 | return ret; |
925 | } |