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 | 399 | if (op & ETNA_PREP_NOSYNC) { |
52791eee | 400 | if (!dma_resv_test_signaled_rcu(obj->resv, |
46a269da LS |
401 | write)) |
402 | return -EBUSY; | |
403 | } else { | |
404 | unsigned long remain = etnaviv_timeout_to_jiffies(timeout); | |
405 | ||
52791eee | 406 | ret = dma_resv_wait_timeout_rcu(obj->resv, |
46a269da LS |
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); | |
52791eee CK |
462 | struct dma_resv *robj = obj->resv; |
463 | struct dma_resv_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); | |
a8c21a54 T |
552 | drm_gem_object_release(obj); |
553 | ||
554 | kfree(etnaviv_obj); | |
555 | } | |
556 | ||
54f09288 | 557 | void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj) |
a8c21a54 T |
558 | { |
559 | struct etnaviv_drm_private *priv = dev->dev_private; | |
560 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
561 | ||
562 | mutex_lock(&priv->gem_lock); | |
563 | list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list); | |
564 | mutex_unlock(&priv->gem_lock); | |
a8c21a54 T |
565 | } |
566 | ||
567 | static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags, | |
c6be8086 | 568 | const struct etnaviv_gem_ops *ops, struct drm_gem_object **obj) |
a8c21a54 T |
569 | { |
570 | struct etnaviv_gem_object *etnaviv_obj; | |
571 | unsigned sz = sizeof(*etnaviv_obj); | |
572 | bool valid = true; | |
573 | ||
574 | /* validate flags */ | |
575 | switch (flags & ETNA_BO_CACHE_MASK) { | |
576 | case ETNA_BO_UNCACHED: | |
577 | case ETNA_BO_CACHED: | |
578 | case ETNA_BO_WC: | |
579 | break; | |
580 | default: | |
581 | valid = false; | |
582 | } | |
583 | ||
584 | if (!valid) { | |
585 | dev_err(dev->dev, "invalid cache flag: %x\n", | |
586 | (flags & ETNA_BO_CACHE_MASK)); | |
587 | return -EINVAL; | |
588 | } | |
589 | ||
590 | etnaviv_obj = kzalloc(sz, GFP_KERNEL); | |
591 | if (!etnaviv_obj) | |
592 | return -ENOMEM; | |
593 | ||
594 | etnaviv_obj->flags = flags; | |
595 | etnaviv_obj->ops = ops; | |
a8c21a54 T |
596 | |
597 | mutex_init(&etnaviv_obj->lock); | |
598 | INIT_LIST_HEAD(&etnaviv_obj->vram_list); | |
599 | ||
600 | *obj = &etnaviv_obj->base; | |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
cdd32563 LS |
605 | /* convenience method to construct a GEM buffer object, and userspace handle */ |
606 | int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
607 | u32 size, u32 flags, u32 *handle) | |
a8c21a54 T |
608 | { |
609 | struct drm_gem_object *obj = NULL; | |
610 | int ret; | |
611 | ||
612 | size = PAGE_ALIGN(size); | |
613 | ||
c6be8086 | 614 | ret = etnaviv_gem_new_impl(dev, size, flags, |
a8c21a54 T |
615 | &etnaviv_gem_shmem_ops, &obj); |
616 | if (ret) | |
617 | goto fail; | |
618 | ||
d6a8743d LS |
619 | lockdep_set_class(&to_etnaviv_bo(obj)->lock, &etnaviv_shm_lock_class); |
620 | ||
a8c21a54 | 621 | ret = drm_gem_object_init(dev, obj, size); |
a8c21a54 T |
622 | if (ret) |
623 | goto fail; | |
624 | ||
fd2450a7 LS |
625 | /* |
626 | * Our buffers are kept pinned, so allocating them from the MOVABLE | |
627 | * zone is a really bad idea, and conflicts with CMA. See comments | |
628 | * above new_inode() why this is required _and_ expected if you're | |
629 | * going to pin these pages. | |
630 | */ | |
631 | mapping_set_gfp_mask(obj->filp->f_mapping, GFP_HIGHUSER | | |
632 | __GFP_RETRY_MAYFAIL | __GFP_NOWARN); | |
633 | ||
54f09288 | 634 | etnaviv_gem_obj_add(dev, obj); |
a8c21a54 T |
635 | |
636 | ret = drm_gem_handle_create(file, obj, handle); | |
637 | ||
638 | /* drop reference from allocate - handle holds it now */ | |
cdd32563 | 639 | fail: |
23d1dd03 | 640 | drm_gem_object_put_unlocked(obj); |
a8c21a54 T |
641 | |
642 | return ret; | |
643 | } | |
644 | ||
a8c21a54 | 645 | int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags, |
c6be8086 | 646 | const struct etnaviv_gem_ops *ops, struct etnaviv_gem_object **res) |
a8c21a54 T |
647 | { |
648 | struct drm_gem_object *obj; | |
649 | int ret; | |
650 | ||
c6be8086 | 651 | ret = etnaviv_gem_new_impl(dev, size, flags, ops, &obj); |
a8c21a54 T |
652 | if (ret) |
653 | return ret; | |
654 | ||
655 | drm_gem_private_object_init(dev, obj, size); | |
656 | ||
657 | *res = to_etnaviv_bo(obj); | |
658 | ||
659 | return 0; | |
660 | } | |
661 | ||
a8c21a54 T |
662 | static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj) |
663 | { | |
664 | struct page **pvec = NULL; | |
b2295c24 LS |
665 | struct etnaviv_gem_userptr *userptr = &etnaviv_obj->userptr; |
666 | int ret, pinned = 0, npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
a8c21a54 | 667 | |
783c06cb LS |
668 | might_lock_read(¤t->mm->mmap_sem); |
669 | ||
b2295c24 LS |
670 | if (userptr->mm != current->mm) |
671 | return -EPERM; | |
a8c21a54 | 672 | |
b2295c24 LS |
673 | pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); |
674 | if (!pvec) | |
675 | return -ENOMEM; | |
676 | ||
677 | do { | |
678 | unsigned num_pages = npages - pinned; | |
679 | uint64_t ptr = userptr->ptr + pinned * PAGE_SIZE; | |
680 | struct page **pages = pvec + pinned; | |
a8c21a54 | 681 | |
b2295c24 LS |
682 | ret = get_user_pages_fast(ptr, num_pages, |
683 | !userptr->ro ? FOLL_WRITE : 0, pages); | |
684 | if (ret < 0) { | |
685 | release_pages(pvec, pinned); | |
2098105e | 686 | kvfree(pvec); |
b2295c24 | 687 | return ret; |
a8c21a54 T |
688 | } |
689 | ||
b2295c24 | 690 | pinned += ret; |
a8c21a54 | 691 | |
b2295c24 | 692 | } while (pinned < npages); |
a8c21a54 | 693 | |
b2295c24 | 694 | etnaviv_obj->pages = pvec; |
a8c21a54 | 695 | |
b2295c24 | 696 | return 0; |
a8c21a54 T |
697 | } |
698 | ||
699 | static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj) | |
700 | { | |
701 | if (etnaviv_obj->sgt) { | |
702 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
703 | sg_free_table(etnaviv_obj->sgt); | |
704 | kfree(etnaviv_obj->sgt); | |
705 | } | |
706 | if (etnaviv_obj->pages) { | |
707 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
708 | ||
c6f92f9f | 709 | release_pages(etnaviv_obj->pages, npages); |
2098105e | 710 | kvfree(etnaviv_obj->pages); |
a8c21a54 | 711 | } |
a8c21a54 T |
712 | } |
713 | ||
a10e2bde LS |
714 | static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
715 | struct vm_area_struct *vma) | |
716 | { | |
717 | return -EINVAL; | |
718 | } | |
719 | ||
a8c21a54 T |
720 | static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = { |
721 | .get_pages = etnaviv_gem_userptr_get_pages, | |
722 | .release = etnaviv_gem_userptr_release, | |
a0a5ab3e | 723 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 724 | .mmap = etnaviv_gem_userptr_mmap_obj, |
a8c21a54 T |
725 | }; |
726 | ||
727 | int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file, | |
728 | uintptr_t ptr, u32 size, u32 flags, u32 *handle) | |
729 | { | |
730 | struct etnaviv_gem_object *etnaviv_obj; | |
731 | int ret; | |
732 | ||
c6be8086 | 733 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, |
a8c21a54 T |
734 | &etnaviv_gem_userptr_ops, &etnaviv_obj); |
735 | if (ret) | |
736 | return ret; | |
737 | ||
d6a8743d LS |
738 | lockdep_set_class(&etnaviv_obj->lock, &etnaviv_userptr_lock_class); |
739 | ||
a8c21a54 | 740 | etnaviv_obj->userptr.ptr = ptr; |
b2295c24 | 741 | etnaviv_obj->userptr.mm = current->mm; |
a8c21a54 | 742 | etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE); |
a8c21a54 | 743 | |
54f09288 | 744 | etnaviv_gem_obj_add(dev, &etnaviv_obj->base); |
a8c21a54 T |
745 | |
746 | ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle); | |
54f09288 | 747 | |
a8c21a54 | 748 | /* drop reference from allocate - handle holds it now */ |
23d1dd03 | 749 | drm_gem_object_put_unlocked(&etnaviv_obj->base); |
a8c21a54 T |
750 | return ret; |
751 | } |