Commit | Line | Data |
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f6ffbd4f | 1 | // SPDX-License-Identifier: GPL-2.0 |
a8c21a54 | 2 | /* |
f6ffbd4f | 3 | * Copyright (C) 2015-2018 Etnaviv Project |
a8c21a54 T |
4 | */ |
5 | ||
6 | #include <linux/spinlock.h> | |
7 | #include <linux/shmem_fs.h> | |
6e84f315 | 8 | #include <linux/sched/mm.h> |
0881e7bd | 9 | #include <linux/sched/task.h> |
a8c21a54 T |
10 | |
11 | #include "etnaviv_drv.h" | |
12 | #include "etnaviv_gem.h" | |
13 | #include "etnaviv_gpu.h" | |
14 | #include "etnaviv_mmu.h" | |
15 | ||
d6a8743d LS |
16 | static struct lock_class_key etnaviv_shm_lock_class; |
17 | static struct lock_class_key etnaviv_userptr_lock_class; | |
18 | ||
a8c21a54 T |
19 | static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj) |
20 | { | |
21 | struct drm_device *dev = etnaviv_obj->base.dev; | |
22 | struct sg_table *sgt = etnaviv_obj->sgt; | |
23 | ||
24 | /* | |
25 | * For non-cached buffers, ensure the new pages are clean | |
26 | * because display controller, GPU, etc. are not coherent. | |
27 | */ | |
28 | if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) | |
29 | dma_map_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL); | |
30 | } | |
31 | ||
32 | static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj) | |
33 | { | |
34 | struct drm_device *dev = etnaviv_obj->base.dev; | |
35 | struct sg_table *sgt = etnaviv_obj->sgt; | |
36 | ||
37 | /* | |
38 | * For non-cached buffers, ensure the new pages are clean | |
39 | * because display controller, GPU, etc. are not coherent: | |
40 | * | |
41 | * WARNING: The DMA API does not support concurrent CPU | |
42 | * and device access to the memory area. With BIDIRECTIONAL, | |
43 | * we will clean the cache lines which overlap the region, | |
44 | * and invalidate all cache lines (partially) contained in | |
45 | * the region. | |
46 | * | |
47 | * If you have dirty data in the overlapping cache lines, | |
48 | * that will corrupt the GPU-written data. If you have | |
49 | * written into the remainder of the region, this can | |
50 | * discard those writes. | |
51 | */ | |
52 | if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) | |
53 | dma_unmap_sg(dev->dev, sgt->sgl, sgt->nents, DMA_BIDIRECTIONAL); | |
54 | } | |
55 | ||
56 | /* called with etnaviv_obj->lock held */ | |
57 | static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
58 | { | |
59 | struct drm_device *dev = etnaviv_obj->base.dev; | |
60 | struct page **p = drm_gem_get_pages(&etnaviv_obj->base); | |
61 | ||
62 | if (IS_ERR(p)) { | |
f91ac470 | 63 | dev_dbg(dev->dev, "could not get pages: %ld\n", PTR_ERR(p)); |
a8c21a54 T |
64 | return PTR_ERR(p); |
65 | } | |
66 | ||
67 | etnaviv_obj->pages = p; | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | static void put_pages(struct etnaviv_gem_object *etnaviv_obj) | |
73 | { | |
74 | if (etnaviv_obj->sgt) { | |
75 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
76 | sg_free_table(etnaviv_obj->sgt); | |
77 | kfree(etnaviv_obj->sgt); | |
78 | etnaviv_obj->sgt = NULL; | |
79 | } | |
80 | if (etnaviv_obj->pages) { | |
81 | drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages, | |
82 | true, false); | |
83 | ||
84 | etnaviv_obj->pages = NULL; | |
85 | } | |
86 | } | |
87 | ||
88 | struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
89 | { | |
90 | int ret; | |
91 | ||
92 | lockdep_assert_held(&etnaviv_obj->lock); | |
93 | ||
94 | if (!etnaviv_obj->pages) { | |
95 | ret = etnaviv_obj->ops->get_pages(etnaviv_obj); | |
96 | if (ret < 0) | |
97 | return ERR_PTR(ret); | |
98 | } | |
99 | ||
100 | if (!etnaviv_obj->sgt) { | |
101 | struct drm_device *dev = etnaviv_obj->base.dev; | |
102 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
103 | struct sg_table *sgt; | |
104 | ||
105 | sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages); | |
106 | if (IS_ERR(sgt)) { | |
107 | dev_err(dev->dev, "failed to allocate sgt: %ld\n", | |
108 | PTR_ERR(sgt)); | |
109 | return ERR_CAST(sgt); | |
110 | } | |
111 | ||
112 | etnaviv_obj->sgt = sgt; | |
113 | ||
114 | etnaviv_gem_scatter_map(etnaviv_obj); | |
115 | } | |
116 | ||
117 | return etnaviv_obj->pages; | |
118 | } | |
119 | ||
120 | void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj) | |
121 | { | |
122 | lockdep_assert_held(&etnaviv_obj->lock); | |
123 | /* when we start tracking the pin count, then do something here */ | |
124 | } | |
125 | ||
0e7f26e6 | 126 | static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
a8c21a54 T |
127 | struct vm_area_struct *vma) |
128 | { | |
a8c21a54 T |
129 | pgprot_t vm_page_prot; |
130 | ||
131 | vma->vm_flags &= ~VM_PFNMAP; | |
132 | vma->vm_flags |= VM_MIXEDMAP; | |
133 | ||
134 | vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
135 | ||
136 | if (etnaviv_obj->flags & ETNA_BO_WC) { | |
137 | vma->vm_page_prot = pgprot_writecombine(vm_page_prot); | |
138 | } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) { | |
139 | vma->vm_page_prot = pgprot_noncached(vm_page_prot); | |
140 | } else { | |
141 | /* | |
142 | * Shunt off cached objs to shmem file so they have their own | |
143 | * address_space (so unmap_mapping_range does what we want, | |
144 | * in particular in the case of mmap'd dmabufs) | |
145 | */ | |
146 | fput(vma->vm_file); | |
0e7f26e6 | 147 | get_file(etnaviv_obj->base.filp); |
a8c21a54 | 148 | vma->vm_pgoff = 0; |
0e7f26e6 | 149 | vma->vm_file = etnaviv_obj->base.filp; |
a8c21a54 T |
150 | |
151 | vma->vm_page_prot = vm_page_prot; | |
152 | } | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
158 | { | |
159 | struct etnaviv_gem_object *obj; | |
160 | int ret; | |
161 | ||
162 | ret = drm_gem_mmap(filp, vma); | |
163 | if (ret) { | |
164 | DBG("mmap failed: %d", ret); | |
165 | return ret; | |
166 | } | |
167 | ||
168 | obj = to_etnaviv_bo(vma->vm_private_data); | |
a10e2bde | 169 | return obj->ops->mmap(obj, vma); |
a8c21a54 T |
170 | } |
171 | ||
cfad05a2 | 172 | vm_fault_t etnaviv_gem_fault(struct vm_fault *vmf) |
a8c21a54 | 173 | { |
11bac800 | 174 | struct vm_area_struct *vma = vmf->vma; |
a8c21a54 T |
175 | struct drm_gem_object *obj = vma->vm_private_data; |
176 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
177 | struct page **pages, *page; | |
178 | pgoff_t pgoff; | |
cfad05a2 | 179 | int err; |
a8c21a54 T |
180 | |
181 | /* | |
182 | * Make sure we don't parallel update on a fault, nor move or remove | |
cfad05a2 | 183 | * something from beneath our feet. Note that vmf_insert_page() is |
a8c21a54 T |
184 | * specifically coded to take care of this, so we don't have to. |
185 | */ | |
cfad05a2 SJ |
186 | err = mutex_lock_interruptible(&etnaviv_obj->lock); |
187 | if (err) | |
188 | return VM_FAULT_NOPAGE; | |
a8c21a54 T |
189 | /* make sure we have pages attached now */ |
190 | pages = etnaviv_gem_get_pages(etnaviv_obj); | |
191 | mutex_unlock(&etnaviv_obj->lock); | |
192 | ||
193 | if (IS_ERR(pages)) { | |
cfad05a2 SJ |
194 | err = PTR_ERR(pages); |
195 | return vmf_error(err); | |
a8c21a54 T |
196 | } |
197 | ||
198 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
1a29d85e | 199 | pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
a8c21a54 T |
200 | |
201 | page = pages[pgoff]; | |
202 | ||
1a29d85e | 203 | VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, |
a8c21a54 T |
204 | page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT); |
205 | ||
cfad05a2 | 206 | return vmf_insert_page(vma, vmf->address, page); |
a8c21a54 T |
207 | } |
208 | ||
209 | int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset) | |
210 | { | |
211 | int ret; | |
212 | ||
213 | /* Make it mmapable */ | |
214 | ret = drm_gem_create_mmap_offset(obj); | |
215 | if (ret) | |
216 | dev_err(obj->dev->dev, "could not allocate mmap offset\n"); | |
217 | else | |
218 | *offset = drm_vma_node_offset_addr(&obj->vma_node); | |
219 | ||
220 | return ret; | |
221 | } | |
222 | ||
223 | static struct etnaviv_vram_mapping * | |
224 | etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj, | |
225 | struct etnaviv_iommu *mmu) | |
226 | { | |
227 | struct etnaviv_vram_mapping *mapping; | |
228 | ||
229 | list_for_each_entry(mapping, &obj->vram_list, obj_node) { | |
230 | if (mapping->mmu == mmu) | |
231 | return mapping; | |
232 | } | |
233 | ||
234 | return NULL; | |
235 | } | |
236 | ||
b6325f40 RK |
237 | void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping) |
238 | { | |
239 | struct etnaviv_gem_object *etnaviv_obj = mapping->object; | |
240 | ||
23d1dd03 | 241 | drm_gem_object_get(&etnaviv_obj->base); |
b6325f40 RK |
242 | |
243 | mutex_lock(&etnaviv_obj->lock); | |
244 | WARN_ON(mapping->use == 0); | |
245 | mapping->use += 1; | |
246 | mutex_unlock(&etnaviv_obj->lock); | |
247 | } | |
248 | ||
249 | void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) | |
250 | { | |
251 | struct etnaviv_gem_object *etnaviv_obj = mapping->object; | |
252 | ||
253 | mutex_lock(&etnaviv_obj->lock); | |
254 | WARN_ON(mapping->use == 0); | |
255 | mapping->use -= 1; | |
256 | mutex_unlock(&etnaviv_obj->lock); | |
257 | ||
23d1dd03 | 258 | drm_gem_object_put_unlocked(&etnaviv_obj->base); |
b6325f40 RK |
259 | } |
260 | ||
261 | struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( | |
262 | struct drm_gem_object *obj, struct etnaviv_gpu *gpu) | |
a8c21a54 T |
263 | { |
264 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
265 | struct etnaviv_vram_mapping *mapping; | |
266 | struct page **pages; | |
267 | int ret = 0; | |
268 | ||
269 | mutex_lock(&etnaviv_obj->lock); | |
270 | mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, gpu->mmu); | |
271 | if (mapping) { | |
272 | /* | |
273 | * Holding the object lock prevents the use count changing | |
274 | * beneath us. If the use count is zero, the MMU might be | |
275 | * reaping this object, so take the lock and re-check that | |
276 | * the MMU owns this mapping to close this race. | |
277 | */ | |
278 | if (mapping->use == 0) { | |
279 | mutex_lock(&gpu->mmu->lock); | |
280 | if (mapping->mmu == gpu->mmu) | |
281 | mapping->use += 1; | |
282 | else | |
283 | mapping = NULL; | |
284 | mutex_unlock(&gpu->mmu->lock); | |
285 | if (mapping) | |
286 | goto out; | |
287 | } else { | |
288 | mapping->use += 1; | |
289 | goto out; | |
290 | } | |
291 | } | |
292 | ||
293 | pages = etnaviv_gem_get_pages(etnaviv_obj); | |
294 | if (IS_ERR(pages)) { | |
295 | ret = PTR_ERR(pages); | |
296 | goto out; | |
297 | } | |
298 | ||
299 | /* | |
300 | * See if we have a reaped vram mapping we can re-use before | |
301 | * allocating a fresh mapping. | |
302 | */ | |
303 | mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL); | |
304 | if (!mapping) { | |
305 | mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); | |
ed94add0 DC |
306 | if (!mapping) { |
307 | ret = -ENOMEM; | |
308 | goto out; | |
309 | } | |
a8c21a54 T |
310 | |
311 | INIT_LIST_HEAD(&mapping->scan_node); | |
312 | mapping->object = etnaviv_obj; | |
313 | } else { | |
314 | list_del(&mapping->obj_node); | |
315 | } | |
316 | ||
317 | mapping->mmu = gpu->mmu; | |
318 | mapping->use = 1; | |
319 | ||
320 | ret = etnaviv_iommu_map_gem(gpu->mmu, etnaviv_obj, gpu->memory_base, | |
321 | mapping); | |
322 | if (ret < 0) | |
323 | kfree(mapping); | |
324 | else | |
325 | list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list); | |
326 | ||
327 | out: | |
328 | mutex_unlock(&etnaviv_obj->lock); | |
329 | ||
b6325f40 RK |
330 | if (ret) |
331 | return ERR_PTR(ret); | |
a8c21a54 | 332 | |
b6325f40 | 333 | /* Take a reference on the object */ |
23d1dd03 | 334 | drm_gem_object_get(obj); |
b6325f40 | 335 | return mapping; |
a8c21a54 T |
336 | } |
337 | ||
ce3088fd | 338 | void *etnaviv_gem_vmap(struct drm_gem_object *obj) |
a8c21a54 T |
339 | { |
340 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
341 | ||
a0a5ab3e LS |
342 | if (etnaviv_obj->vaddr) |
343 | return etnaviv_obj->vaddr; | |
a8c21a54 | 344 | |
a0a5ab3e LS |
345 | mutex_lock(&etnaviv_obj->lock); |
346 | /* | |
347 | * Need to check again, as we might have raced with another thread | |
348 | * while waiting for the mutex. | |
349 | */ | |
350 | if (!etnaviv_obj->vaddr) | |
351 | etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj); | |
a8c21a54 T |
352 | mutex_unlock(&etnaviv_obj->lock); |
353 | ||
354 | return etnaviv_obj->vaddr; | |
355 | } | |
356 | ||
a0a5ab3e LS |
357 | static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj) |
358 | { | |
359 | struct page **pages; | |
360 | ||
361 | lockdep_assert_held(&obj->lock); | |
362 | ||
363 | pages = etnaviv_gem_get_pages(obj); | |
364 | if (IS_ERR(pages)) | |
365 | return NULL; | |
366 | ||
367 | return vmap(pages, obj->base.size >> PAGE_SHIFT, | |
368 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
369 | } | |
370 | ||
a8c21a54 T |
371 | static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op) |
372 | { | |
373 | if (op & ETNA_PREP_READ) | |
374 | return DMA_FROM_DEVICE; | |
375 | else if (op & ETNA_PREP_WRITE) | |
376 | return DMA_TO_DEVICE; | |
377 | else | |
378 | return DMA_BIDIRECTIONAL; | |
379 | } | |
380 | ||
381 | int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op, | |
382 | struct timespec *timeout) | |
383 | { | |
384 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
385 | struct drm_device *dev = obj->dev; | |
386 | bool write = !!(op & ETNA_PREP_WRITE); | |
46a269da LS |
387 | int ret; |
388 | ||
8cc47b3e LS |
389 | if (!etnaviv_obj->sgt) { |
390 | void *ret; | |
391 | ||
392 | mutex_lock(&etnaviv_obj->lock); | |
393 | ret = etnaviv_gem_get_pages(etnaviv_obj); | |
394 | mutex_unlock(&etnaviv_obj->lock); | |
395 | if (IS_ERR(ret)) | |
396 | return PTR_ERR(ret); | |
397 | } | |
398 | ||
46a269da LS |
399 | if (op & ETNA_PREP_NOSYNC) { |
400 | if (!reservation_object_test_signaled_rcu(etnaviv_obj->resv, | |
401 | write)) | |
402 | return -EBUSY; | |
403 | } else { | |
404 | unsigned long remain = etnaviv_timeout_to_jiffies(timeout); | |
405 | ||
406 | ret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv, | |
407 | write, true, remain); | |
408 | if (ret <= 0) | |
409 | return ret == 0 ? -ETIMEDOUT : ret; | |
410 | } | |
a8c21a54 T |
411 | |
412 | if (etnaviv_obj->flags & ETNA_BO_CACHED) { | |
a8c21a54 T |
413 | dma_sync_sg_for_cpu(dev->dev, etnaviv_obj->sgt->sgl, |
414 | etnaviv_obj->sgt->nents, | |
415 | etnaviv_op_to_dma_dir(op)); | |
416 | etnaviv_obj->last_cpu_prep_op = op; | |
417 | } | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
422 | int etnaviv_gem_cpu_fini(struct drm_gem_object *obj) | |
423 | { | |
424 | struct drm_device *dev = obj->dev; | |
425 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
426 | ||
427 | if (etnaviv_obj->flags & ETNA_BO_CACHED) { | |
428 | /* fini without a prep is almost certainly a userspace error */ | |
429 | WARN_ON(etnaviv_obj->last_cpu_prep_op == 0); | |
430 | dma_sync_sg_for_device(dev->dev, etnaviv_obj->sgt->sgl, | |
431 | etnaviv_obj->sgt->nents, | |
432 | etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op)); | |
433 | etnaviv_obj->last_cpu_prep_op = 0; | |
434 | } | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj, | |
440 | struct timespec *timeout) | |
441 | { | |
442 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
443 | ||
444 | return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout); | |
445 | } | |
446 | ||
447 | #ifdef CONFIG_DEBUG_FS | |
f54d1867 | 448 | static void etnaviv_gem_describe_fence(struct dma_fence *fence, |
a8c21a54 T |
449 | const char *type, struct seq_file *m) |
450 | { | |
f54d1867 | 451 | if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) |
3415701a | 452 | seq_printf(m, "\t%9s: %s %s seq %llu\n", |
a8c21a54 T |
453 | type, |
454 | fence->ops->get_driver_name(fence), | |
455 | fence->ops->get_timeline_name(fence), | |
456 | fence->seqno); | |
457 | } | |
458 | ||
459 | static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m) | |
460 | { | |
461 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
462 | struct reservation_object *robj = etnaviv_obj->resv; | |
463 | struct reservation_object_list *fobj; | |
f54d1867 | 464 | struct dma_fence *fence; |
a8c21a54 T |
465 | unsigned long off = drm_vma_node_start(&obj->vma_node); |
466 | ||
467 | seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n", | |
468 | etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I', | |
2c935bc5 | 469 | obj->name, kref_read(&obj->refcount), |
a8c21a54 T |
470 | off, etnaviv_obj->vaddr, obj->size); |
471 | ||
472 | rcu_read_lock(); | |
473 | fobj = rcu_dereference(robj->fence); | |
474 | if (fobj) { | |
475 | unsigned int i, shared_count = fobj->shared_count; | |
476 | ||
477 | for (i = 0; i < shared_count; i++) { | |
478 | fence = rcu_dereference(fobj->shared[i]); | |
479 | etnaviv_gem_describe_fence(fence, "Shared", m); | |
480 | } | |
481 | } | |
482 | ||
483 | fence = rcu_dereference(robj->fence_excl); | |
484 | if (fence) | |
485 | etnaviv_gem_describe_fence(fence, "Exclusive", m); | |
486 | rcu_read_unlock(); | |
487 | } | |
488 | ||
489 | void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv, | |
490 | struct seq_file *m) | |
491 | { | |
492 | struct etnaviv_gem_object *etnaviv_obj; | |
493 | int count = 0; | |
494 | size_t size = 0; | |
495 | ||
496 | mutex_lock(&priv->gem_lock); | |
497 | list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) { | |
498 | struct drm_gem_object *obj = &etnaviv_obj->base; | |
499 | ||
500 | seq_puts(m, " "); | |
501 | etnaviv_gem_describe(obj, m); | |
502 | count++; | |
503 | size += obj->size; | |
504 | } | |
505 | mutex_unlock(&priv->gem_lock); | |
506 | ||
507 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
508 | } | |
509 | #endif | |
510 | ||
511 | static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj) | |
512 | { | |
8c6e6188 | 513 | vunmap(etnaviv_obj->vaddr); |
a8c21a54 T |
514 | put_pages(etnaviv_obj); |
515 | } | |
516 | ||
517 | static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = { | |
518 | .get_pages = etnaviv_gem_shmem_get_pages, | |
519 | .release = etnaviv_gem_shmem_release, | |
a0a5ab3e | 520 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 521 | .mmap = etnaviv_gem_mmap_obj, |
a8c21a54 T |
522 | }; |
523 | ||
524 | void etnaviv_gem_free_object(struct drm_gem_object *obj) | |
525 | { | |
526 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
51841752 | 527 | struct etnaviv_drm_private *priv = obj->dev->dev_private; |
a8c21a54 T |
528 | struct etnaviv_vram_mapping *mapping, *tmp; |
529 | ||
530 | /* object should not be active */ | |
531 | WARN_ON(is_active(etnaviv_obj)); | |
532 | ||
51841752 | 533 | mutex_lock(&priv->gem_lock); |
a8c21a54 | 534 | list_del(&etnaviv_obj->gem_node); |
51841752 | 535 | mutex_unlock(&priv->gem_lock); |
a8c21a54 T |
536 | |
537 | list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list, | |
538 | obj_node) { | |
539 | struct etnaviv_iommu *mmu = mapping->mmu; | |
540 | ||
541 | WARN_ON(mapping->use); | |
542 | ||
543 | if (mmu) | |
544 | etnaviv_iommu_unmap_gem(mmu, mapping); | |
545 | ||
546 | list_del(&mapping->obj_node); | |
547 | kfree(mapping); | |
548 | } | |
549 | ||
550 | drm_gem_free_mmap_offset(obj); | |
551 | etnaviv_obj->ops->release(etnaviv_obj); | |
552 | if (etnaviv_obj->resv == &etnaviv_obj->_resv) | |
553 | reservation_object_fini(&etnaviv_obj->_resv); | |
554 | drm_gem_object_release(obj); | |
555 | ||
556 | kfree(etnaviv_obj); | |
557 | } | |
558 | ||
54f09288 | 559 | void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj) |
a8c21a54 T |
560 | { |
561 | struct etnaviv_drm_private *priv = dev->dev_private; | |
562 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
563 | ||
564 | mutex_lock(&priv->gem_lock); | |
565 | list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list); | |
566 | mutex_unlock(&priv->gem_lock); | |
a8c21a54 T |
567 | } |
568 | ||
569 | static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags, | |
570 | struct reservation_object *robj, const struct etnaviv_gem_ops *ops, | |
571 | struct drm_gem_object **obj) | |
572 | { | |
573 | struct etnaviv_gem_object *etnaviv_obj; | |
574 | unsigned sz = sizeof(*etnaviv_obj); | |
575 | bool valid = true; | |
576 | ||
577 | /* validate flags */ | |
578 | switch (flags & ETNA_BO_CACHE_MASK) { | |
579 | case ETNA_BO_UNCACHED: | |
580 | case ETNA_BO_CACHED: | |
581 | case ETNA_BO_WC: | |
582 | break; | |
583 | default: | |
584 | valid = false; | |
585 | } | |
586 | ||
587 | if (!valid) { | |
588 | dev_err(dev->dev, "invalid cache flag: %x\n", | |
589 | (flags & ETNA_BO_CACHE_MASK)); | |
590 | return -EINVAL; | |
591 | } | |
592 | ||
593 | etnaviv_obj = kzalloc(sz, GFP_KERNEL); | |
594 | if (!etnaviv_obj) | |
595 | return -ENOMEM; | |
596 | ||
597 | etnaviv_obj->flags = flags; | |
598 | etnaviv_obj->ops = ops; | |
599 | if (robj) { | |
600 | etnaviv_obj->resv = robj; | |
601 | } else { | |
602 | etnaviv_obj->resv = &etnaviv_obj->_resv; | |
603 | reservation_object_init(&etnaviv_obj->_resv); | |
604 | } | |
605 | ||
606 | mutex_init(&etnaviv_obj->lock); | |
607 | INIT_LIST_HEAD(&etnaviv_obj->vram_list); | |
608 | ||
609 | *obj = &etnaviv_obj->base; | |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
cdd32563 LS |
614 | /* convenience method to construct a GEM buffer object, and userspace handle */ |
615 | int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
616 | u32 size, u32 flags, u32 *handle) | |
a8c21a54 T |
617 | { |
618 | struct drm_gem_object *obj = NULL; | |
619 | int ret; | |
620 | ||
621 | size = PAGE_ALIGN(size); | |
622 | ||
623 | ret = etnaviv_gem_new_impl(dev, size, flags, NULL, | |
624 | &etnaviv_gem_shmem_ops, &obj); | |
625 | if (ret) | |
626 | goto fail; | |
627 | ||
d6a8743d LS |
628 | lockdep_set_class(&to_etnaviv_bo(obj)->lock, &etnaviv_shm_lock_class); |
629 | ||
a8c21a54 T |
630 | ret = drm_gem_object_init(dev, obj, size); |
631 | if (ret == 0) { | |
632 | struct address_space *mapping; | |
633 | ||
634 | /* | |
635 | * Our buffers are kept pinned, so allocating them | |
636 | * from the MOVABLE zone is a really bad idea, and | |
cdd32563 | 637 | * conflicts with CMA. See comments above new_inode() |
a8c21a54 T |
638 | * why this is required _and_ expected if you're |
639 | * going to pin these pages. | |
640 | */ | |
93c76a3d | 641 | mapping = obj->filp->f_mapping; |
6cbf0400 | 642 | mapping_set_gfp_mask(mapping, GFP_HIGHUSER | |
65375b87 | 643 | __GFP_RETRY_MAYFAIL | __GFP_NOWARN); |
a8c21a54 T |
644 | } |
645 | ||
646 | if (ret) | |
647 | goto fail; | |
648 | ||
54f09288 | 649 | etnaviv_gem_obj_add(dev, obj); |
a8c21a54 T |
650 | |
651 | ret = drm_gem_handle_create(file, obj, handle); | |
652 | ||
653 | /* drop reference from allocate - handle holds it now */ | |
cdd32563 | 654 | fail: |
23d1dd03 | 655 | drm_gem_object_put_unlocked(obj); |
a8c21a54 T |
656 | |
657 | return ret; | |
658 | } | |
659 | ||
a8c21a54 T |
660 | int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags, |
661 | struct reservation_object *robj, const struct etnaviv_gem_ops *ops, | |
662 | struct etnaviv_gem_object **res) | |
663 | { | |
664 | struct drm_gem_object *obj; | |
665 | int ret; | |
666 | ||
667 | ret = etnaviv_gem_new_impl(dev, size, flags, robj, ops, &obj); | |
668 | if (ret) | |
669 | return ret; | |
670 | ||
671 | drm_gem_private_object_init(dev, obj, size); | |
672 | ||
673 | *res = to_etnaviv_bo(obj); | |
674 | ||
675 | return 0; | |
676 | } | |
677 | ||
a8c21a54 T |
678 | static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj) |
679 | { | |
680 | struct page **pvec = NULL; | |
b2295c24 LS |
681 | struct etnaviv_gem_userptr *userptr = &etnaviv_obj->userptr; |
682 | int ret, pinned = 0, npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
a8c21a54 | 683 | |
783c06cb LS |
684 | might_lock_read(¤t->mm->mmap_sem); |
685 | ||
b2295c24 LS |
686 | if (userptr->mm != current->mm) |
687 | return -EPERM; | |
a8c21a54 | 688 | |
b2295c24 LS |
689 | pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); |
690 | if (!pvec) | |
691 | return -ENOMEM; | |
692 | ||
693 | do { | |
694 | unsigned num_pages = npages - pinned; | |
695 | uint64_t ptr = userptr->ptr + pinned * PAGE_SIZE; | |
696 | struct page **pages = pvec + pinned; | |
a8c21a54 | 697 | |
b2295c24 LS |
698 | ret = get_user_pages_fast(ptr, num_pages, |
699 | !userptr->ro ? FOLL_WRITE : 0, pages); | |
700 | if (ret < 0) { | |
701 | release_pages(pvec, pinned); | |
2098105e | 702 | kvfree(pvec); |
b2295c24 | 703 | return ret; |
a8c21a54 T |
704 | } |
705 | ||
b2295c24 | 706 | pinned += ret; |
a8c21a54 | 707 | |
b2295c24 | 708 | } while (pinned < npages); |
a8c21a54 | 709 | |
b2295c24 | 710 | etnaviv_obj->pages = pvec; |
a8c21a54 | 711 | |
b2295c24 | 712 | return 0; |
a8c21a54 T |
713 | } |
714 | ||
715 | static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj) | |
716 | { | |
717 | if (etnaviv_obj->sgt) { | |
718 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
719 | sg_free_table(etnaviv_obj->sgt); | |
720 | kfree(etnaviv_obj->sgt); | |
721 | } | |
722 | if (etnaviv_obj->pages) { | |
723 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
724 | ||
c6f92f9f | 725 | release_pages(etnaviv_obj->pages, npages); |
2098105e | 726 | kvfree(etnaviv_obj->pages); |
a8c21a54 | 727 | } |
a8c21a54 T |
728 | } |
729 | ||
a10e2bde LS |
730 | static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
731 | struct vm_area_struct *vma) | |
732 | { | |
733 | return -EINVAL; | |
734 | } | |
735 | ||
a8c21a54 T |
736 | static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = { |
737 | .get_pages = etnaviv_gem_userptr_get_pages, | |
738 | .release = etnaviv_gem_userptr_release, | |
a0a5ab3e | 739 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 740 | .mmap = etnaviv_gem_userptr_mmap_obj, |
a8c21a54 T |
741 | }; |
742 | ||
743 | int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file, | |
744 | uintptr_t ptr, u32 size, u32 flags, u32 *handle) | |
745 | { | |
746 | struct etnaviv_gem_object *etnaviv_obj; | |
747 | int ret; | |
748 | ||
749 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, NULL, | |
750 | &etnaviv_gem_userptr_ops, &etnaviv_obj); | |
751 | if (ret) | |
752 | return ret; | |
753 | ||
d6a8743d LS |
754 | lockdep_set_class(&etnaviv_obj->lock, &etnaviv_userptr_lock_class); |
755 | ||
a8c21a54 | 756 | etnaviv_obj->userptr.ptr = ptr; |
b2295c24 | 757 | etnaviv_obj->userptr.mm = current->mm; |
a8c21a54 | 758 | etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE); |
a8c21a54 | 759 | |
54f09288 | 760 | etnaviv_gem_obj_add(dev, &etnaviv_obj->base); |
a8c21a54 T |
761 | |
762 | ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle); | |
54f09288 | 763 | |
a8c21a54 | 764 | /* drop reference from allocate - handle holds it now */ |
23d1dd03 | 765 | drm_gem_object_put_unlocked(&etnaviv_obj->base); |
a8c21a54 T |
766 | return ret; |
767 | } |