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 | ||
6eae41fe SR |
6 | #include <drm/drm_prime.h> |
7 | #include <linux/dma-mapping.h> | |
a8c21a54 | 8 | #include <linux/shmem_fs.h> |
6eae41fe SR |
9 | #include <linux/spinlock.h> |
10 | #include <linux/vmalloc.h> | |
a8c21a54 T |
11 | |
12 | #include "etnaviv_drv.h" | |
13 | #include "etnaviv_gem.h" | |
14 | #include "etnaviv_gpu.h" | |
15 | #include "etnaviv_mmu.h" | |
16 | ||
d6a8743d LS |
17 | static struct lock_class_key etnaviv_shm_lock_class; |
18 | static struct lock_class_key etnaviv_userptr_lock_class; | |
19 | ||
a8c21a54 T |
20 | static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj) |
21 | { | |
22 | struct drm_device *dev = etnaviv_obj->base.dev; | |
23 | struct sg_table *sgt = etnaviv_obj->sgt; | |
24 | ||
25 | /* | |
26 | * For non-cached buffers, ensure the new pages are clean | |
27 | * because display controller, GPU, etc. are not coherent. | |
28 | */ | |
29 | if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) | |
182354a5 | 30 | dma_map_sgtable(dev->dev, sgt, DMA_BIDIRECTIONAL, 0); |
a8c21a54 T |
31 | } |
32 | ||
33 | static void etnaviv_gem_scatterlist_unmap(struct etnaviv_gem_object *etnaviv_obj) | |
34 | { | |
35 | struct drm_device *dev = etnaviv_obj->base.dev; | |
36 | struct sg_table *sgt = etnaviv_obj->sgt; | |
37 | ||
38 | /* | |
39 | * For non-cached buffers, ensure the new pages are clean | |
40 | * because display controller, GPU, etc. are not coherent: | |
41 | * | |
42 | * WARNING: The DMA API does not support concurrent CPU | |
43 | * and device access to the memory area. With BIDIRECTIONAL, | |
44 | * we will clean the cache lines which overlap the region, | |
45 | * and invalidate all cache lines (partially) contained in | |
46 | * the region. | |
47 | * | |
48 | * If you have dirty data in the overlapping cache lines, | |
49 | * that will corrupt the GPU-written data. If you have | |
50 | * written into the remainder of the region, this can | |
51 | * discard those writes. | |
52 | */ | |
53 | if (etnaviv_obj->flags & ETNA_BO_CACHE_MASK) | |
182354a5 | 54 | dma_unmap_sgtable(dev->dev, sgt, DMA_BIDIRECTIONAL, 0); |
a8c21a54 T |
55 | } |
56 | ||
57 | /* called with etnaviv_obj->lock held */ | |
58 | static int etnaviv_gem_shmem_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
59 | { | |
60 | struct drm_device *dev = etnaviv_obj->base.dev; | |
61 | struct page **p = drm_gem_get_pages(&etnaviv_obj->base); | |
62 | ||
63 | if (IS_ERR(p)) { | |
f91ac470 | 64 | dev_dbg(dev->dev, "could not get pages: %ld\n", PTR_ERR(p)); |
a8c21a54 T |
65 | return PTR_ERR(p); |
66 | } | |
67 | ||
68 | etnaviv_obj->pages = p; | |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
73 | static void put_pages(struct etnaviv_gem_object *etnaviv_obj) | |
74 | { | |
75 | if (etnaviv_obj->sgt) { | |
76 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
77 | sg_free_table(etnaviv_obj->sgt); | |
78 | kfree(etnaviv_obj->sgt); | |
79 | etnaviv_obj->sgt = NULL; | |
80 | } | |
81 | if (etnaviv_obj->pages) { | |
82 | drm_gem_put_pages(&etnaviv_obj->base, etnaviv_obj->pages, | |
83 | true, false); | |
84 | ||
85 | etnaviv_obj->pages = NULL; | |
86 | } | |
87 | } | |
88 | ||
89 | struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj) | |
90 | { | |
91 | int ret; | |
92 | ||
93 | lockdep_assert_held(&etnaviv_obj->lock); | |
94 | ||
95 | if (!etnaviv_obj->pages) { | |
96 | ret = etnaviv_obj->ops->get_pages(etnaviv_obj); | |
97 | if (ret < 0) | |
98 | return ERR_PTR(ret); | |
99 | } | |
100 | ||
101 | if (!etnaviv_obj->sgt) { | |
102 | struct drm_device *dev = etnaviv_obj->base.dev; | |
103 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
104 | struct sg_table *sgt; | |
105 | ||
707d561f GH |
106 | sgt = drm_prime_pages_to_sg(etnaviv_obj->base.dev, |
107 | etnaviv_obj->pages, npages); | |
a8c21a54 T |
108 | if (IS_ERR(sgt)) { |
109 | dev_err(dev->dev, "failed to allocate sgt: %ld\n", | |
110 | PTR_ERR(sgt)); | |
111 | return ERR_CAST(sgt); | |
112 | } | |
113 | ||
114 | etnaviv_obj->sgt = sgt; | |
115 | ||
116 | etnaviv_gem_scatter_map(etnaviv_obj); | |
117 | } | |
118 | ||
119 | return etnaviv_obj->pages; | |
120 | } | |
121 | ||
122 | void etnaviv_gem_put_pages(struct etnaviv_gem_object *etnaviv_obj) | |
123 | { | |
124 | lockdep_assert_held(&etnaviv_obj->lock); | |
125 | /* when we start tracking the pin count, then do something here */ | |
126 | } | |
127 | ||
0e7f26e6 | 128 | static int etnaviv_gem_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
a8c21a54 T |
129 | struct vm_area_struct *vma) |
130 | { | |
a8c21a54 T |
131 | pgprot_t vm_page_prot; |
132 | ||
81fd23e2 | 133 | vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP; |
a8c21a54 T |
134 | |
135 | vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
136 | ||
137 | if (etnaviv_obj->flags & ETNA_BO_WC) { | |
138 | vma->vm_page_prot = pgprot_writecombine(vm_page_prot); | |
139 | } else if (etnaviv_obj->flags & ETNA_BO_UNCACHED) { | |
140 | vma->vm_page_prot = pgprot_noncached(vm_page_prot); | |
141 | } else { | |
142 | /* | |
143 | * Shunt off cached objs to shmem file so they have their own | |
144 | * address_space (so unmap_mapping_range does what we want, | |
145 | * in particular in the case of mmap'd dmabufs) | |
146 | */ | |
a8c21a54 | 147 | vma->vm_pgoff = 0; |
295992fb | 148 | vma_set_file(vma, etnaviv_obj->base.filp); |
a8c21a54 T |
149 | |
150 | vma->vm_page_prot = vm_page_prot; | |
151 | } | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
81fd23e2 | 156 | static int etnaviv_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) |
a8c21a54 | 157 | { |
81fd23e2 | 158 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); |
a8c21a54 | 159 | |
81fd23e2 | 160 | return etnaviv_obj->ops->mmap(etnaviv_obj, vma); |
a8c21a54 T |
161 | } |
162 | ||
a7730627 | 163 | static vm_fault_t etnaviv_gem_fault(struct vm_fault *vmf) |
a8c21a54 | 164 | { |
11bac800 | 165 | struct vm_area_struct *vma = vmf->vma; |
a8c21a54 T |
166 | struct drm_gem_object *obj = vma->vm_private_data; |
167 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
168 | struct page **pages, *page; | |
169 | pgoff_t pgoff; | |
cfad05a2 | 170 | int err; |
a8c21a54 T |
171 | |
172 | /* | |
173 | * Make sure we don't parallel update on a fault, nor move or remove | |
cfad05a2 | 174 | * something from beneath our feet. Note that vmf_insert_page() is |
a8c21a54 T |
175 | * specifically coded to take care of this, so we don't have to. |
176 | */ | |
cfad05a2 SJ |
177 | err = mutex_lock_interruptible(&etnaviv_obj->lock); |
178 | if (err) | |
179 | return VM_FAULT_NOPAGE; | |
a8c21a54 T |
180 | /* make sure we have pages attached now */ |
181 | pages = etnaviv_gem_get_pages(etnaviv_obj); | |
182 | mutex_unlock(&etnaviv_obj->lock); | |
183 | ||
184 | if (IS_ERR(pages)) { | |
cfad05a2 SJ |
185 | err = PTR_ERR(pages); |
186 | return vmf_error(err); | |
a8c21a54 T |
187 | } |
188 | ||
189 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
1a29d85e | 190 | pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
a8c21a54 T |
191 | |
192 | page = pages[pgoff]; | |
193 | ||
1a29d85e | 194 | VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, |
a8c21a54 T |
195 | page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT); |
196 | ||
cfad05a2 | 197 | return vmf_insert_page(vma, vmf->address, page); |
a8c21a54 T |
198 | } |
199 | ||
200 | int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset) | |
201 | { | |
202 | int ret; | |
203 | ||
204 | /* Make it mmapable */ | |
205 | ret = drm_gem_create_mmap_offset(obj); | |
206 | if (ret) | |
207 | dev_err(obj->dev->dev, "could not allocate mmap offset\n"); | |
208 | else | |
209 | *offset = drm_vma_node_offset_addr(&obj->vma_node); | |
210 | ||
211 | return ret; | |
212 | } | |
213 | ||
214 | static struct etnaviv_vram_mapping * | |
215 | etnaviv_gem_get_vram_mapping(struct etnaviv_gem_object *obj, | |
27b67278 | 216 | struct etnaviv_iommu_context *context) |
a8c21a54 T |
217 | { |
218 | struct etnaviv_vram_mapping *mapping; | |
219 | ||
220 | list_for_each_entry(mapping, &obj->vram_list, obj_node) { | |
27b67278 | 221 | if (mapping->context == context) |
a8c21a54 T |
222 | return mapping; |
223 | } | |
224 | ||
225 | return NULL; | |
226 | } | |
227 | ||
b6325f40 RK |
228 | void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping) |
229 | { | |
230 | struct etnaviv_gem_object *etnaviv_obj = mapping->object; | |
231 | ||
232 | mutex_lock(&etnaviv_obj->lock); | |
233 | WARN_ON(mapping->use == 0); | |
234 | mapping->use -= 1; | |
235 | mutex_unlock(&etnaviv_obj->lock); | |
236 | ||
6780bf32 | 237 | drm_gem_object_put(&etnaviv_obj->base); |
b6325f40 RK |
238 | } |
239 | ||
240 | struct etnaviv_vram_mapping *etnaviv_gem_mapping_get( | |
088880dd LS |
241 | struct drm_gem_object *obj, struct etnaviv_iommu_context *mmu_context, |
242 | u64 va) | |
a8c21a54 T |
243 | { |
244 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
245 | struct etnaviv_vram_mapping *mapping; | |
246 | struct page **pages; | |
247 | int ret = 0; | |
248 | ||
249 | mutex_lock(&etnaviv_obj->lock); | |
e6364d70 | 250 | mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, mmu_context); |
a8c21a54 T |
251 | if (mapping) { |
252 | /* | |
253 | * Holding the object lock prevents the use count changing | |
254 | * beneath us. If the use count is zero, the MMU might be | |
255 | * reaping this object, so take the lock and re-check that | |
256 | * the MMU owns this mapping to close this race. | |
257 | */ | |
258 | if (mapping->use == 0) { | |
e6364d70 LS |
259 | mutex_lock(&mmu_context->lock); |
260 | if (mapping->context == mmu_context) | |
a8c21a54 T |
261 | mapping->use += 1; |
262 | else | |
263 | mapping = NULL; | |
e6364d70 | 264 | mutex_unlock(&mmu_context->lock); |
a8c21a54 T |
265 | if (mapping) |
266 | goto out; | |
267 | } else { | |
268 | mapping->use += 1; | |
269 | goto out; | |
270 | } | |
271 | } | |
272 | ||
273 | pages = etnaviv_gem_get_pages(etnaviv_obj); | |
274 | if (IS_ERR(pages)) { | |
275 | ret = PTR_ERR(pages); | |
276 | goto out; | |
277 | } | |
278 | ||
279 | /* | |
280 | * See if we have a reaped vram mapping we can re-use before | |
281 | * allocating a fresh mapping. | |
282 | */ | |
283 | mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL); | |
284 | if (!mapping) { | |
285 | mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); | |
ed94add0 DC |
286 | if (!mapping) { |
287 | ret = -ENOMEM; | |
288 | goto out; | |
289 | } | |
a8c21a54 T |
290 | |
291 | INIT_LIST_HEAD(&mapping->scan_node); | |
292 | mapping->object = etnaviv_obj; | |
293 | } else { | |
294 | list_del(&mapping->obj_node); | |
295 | } | |
296 | ||
a8c21a54 T |
297 | mapping->use = 1; |
298 | ||
17e4660a | 299 | ret = etnaviv_iommu_map_gem(mmu_context, etnaviv_obj, |
17eae23b | 300 | mmu_context->global->memory_base, |
088880dd | 301 | mapping, va); |
11ad6a1f | 302 | if (ret < 0) |
a8c21a54 | 303 | kfree(mapping); |
11ad6a1f | 304 | else |
a8c21a54 T |
305 | list_add_tail(&mapping->obj_node, &etnaviv_obj->vram_list); |
306 | ||
307 | out: | |
308 | mutex_unlock(&etnaviv_obj->lock); | |
309 | ||
b6325f40 RK |
310 | if (ret) |
311 | return ERR_PTR(ret); | |
a8c21a54 | 312 | |
b6325f40 | 313 | /* Take a reference on the object */ |
23d1dd03 | 314 | drm_gem_object_get(obj); |
b6325f40 | 315 | return mapping; |
a8c21a54 T |
316 | } |
317 | ||
ce3088fd | 318 | void *etnaviv_gem_vmap(struct drm_gem_object *obj) |
a8c21a54 T |
319 | { |
320 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
321 | ||
a0a5ab3e LS |
322 | if (etnaviv_obj->vaddr) |
323 | return etnaviv_obj->vaddr; | |
a8c21a54 | 324 | |
a0a5ab3e LS |
325 | mutex_lock(&etnaviv_obj->lock); |
326 | /* | |
327 | * Need to check again, as we might have raced with another thread | |
328 | * while waiting for the mutex. | |
329 | */ | |
330 | if (!etnaviv_obj->vaddr) | |
331 | etnaviv_obj->vaddr = etnaviv_obj->ops->vmap(etnaviv_obj); | |
a8c21a54 T |
332 | mutex_unlock(&etnaviv_obj->lock); |
333 | ||
334 | return etnaviv_obj->vaddr; | |
335 | } | |
336 | ||
a0a5ab3e LS |
337 | static void *etnaviv_gem_vmap_impl(struct etnaviv_gem_object *obj) |
338 | { | |
339 | struct page **pages; | |
340 | ||
341 | lockdep_assert_held(&obj->lock); | |
342 | ||
343 | pages = etnaviv_gem_get_pages(obj); | |
344 | if (IS_ERR(pages)) | |
345 | return NULL; | |
346 | ||
347 | return vmap(pages, obj->base.size >> PAGE_SHIFT, | |
348 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
349 | } | |
350 | ||
a8c21a54 T |
351 | static inline enum dma_data_direction etnaviv_op_to_dma_dir(u32 op) |
352 | { | |
353 | if (op & ETNA_PREP_READ) | |
354 | return DMA_FROM_DEVICE; | |
355 | else if (op & ETNA_PREP_WRITE) | |
356 | return DMA_TO_DEVICE; | |
357 | else | |
358 | return DMA_BIDIRECTIONAL; | |
359 | } | |
360 | ||
361 | int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op, | |
38c4a4cf | 362 | struct drm_etnaviv_timespec *timeout) |
a8c21a54 T |
363 | { |
364 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
365 | struct drm_device *dev = obj->dev; | |
366 | bool write = !!(op & ETNA_PREP_WRITE); | |
46a269da LS |
367 | int ret; |
368 | ||
8cc47b3e LS |
369 | if (!etnaviv_obj->sgt) { |
370 | void *ret; | |
371 | ||
372 | mutex_lock(&etnaviv_obj->lock); | |
373 | ret = etnaviv_gem_get_pages(etnaviv_obj); | |
374 | mutex_unlock(&etnaviv_obj->lock); | |
375 | if (IS_ERR(ret)) | |
376 | return PTR_ERR(ret); | |
377 | } | |
378 | ||
46a269da | 379 | if (op & ETNA_PREP_NOSYNC) { |
7bc80a54 CK |
380 | if (!dma_resv_test_signaled(obj->resv, |
381 | dma_resv_usage_rw(write))) | |
46a269da LS |
382 | return -EBUSY; |
383 | } else { | |
384 | unsigned long remain = etnaviv_timeout_to_jiffies(timeout); | |
385 | ||
7bc80a54 CK |
386 | ret = dma_resv_wait_timeout(obj->resv, dma_resv_usage_rw(write), |
387 | true, remain); | |
46a269da LS |
388 | if (ret <= 0) |
389 | return ret == 0 ? -ETIMEDOUT : ret; | |
390 | } | |
a8c21a54 T |
391 | |
392 | if (etnaviv_obj->flags & ETNA_BO_CACHED) { | |
182354a5 MS |
393 | dma_sync_sgtable_for_cpu(dev->dev, etnaviv_obj->sgt, |
394 | etnaviv_op_to_dma_dir(op)); | |
a8c21a54 T |
395 | etnaviv_obj->last_cpu_prep_op = op; |
396 | } | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
401 | int etnaviv_gem_cpu_fini(struct drm_gem_object *obj) | |
402 | { | |
403 | struct drm_device *dev = obj->dev; | |
404 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
405 | ||
406 | if (etnaviv_obj->flags & ETNA_BO_CACHED) { | |
407 | /* fini without a prep is almost certainly a userspace error */ | |
408 | WARN_ON(etnaviv_obj->last_cpu_prep_op == 0); | |
182354a5 | 409 | dma_sync_sgtable_for_device(dev->dev, etnaviv_obj->sgt, |
a8c21a54 T |
410 | etnaviv_op_to_dma_dir(etnaviv_obj->last_cpu_prep_op)); |
411 | etnaviv_obj->last_cpu_prep_op = 0; | |
412 | } | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj, | |
38c4a4cf | 418 | struct drm_etnaviv_timespec *timeout) |
a8c21a54 T |
419 | { |
420 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
421 | ||
422 | return etnaviv_gpu_wait_obj_inactive(gpu, etnaviv_obj, timeout); | |
423 | } | |
424 | ||
425 | #ifdef CONFIG_DEBUG_FS | |
a8c21a54 T |
426 | static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m) |
427 | { | |
428 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
52791eee | 429 | struct dma_resv *robj = obj->resv; |
a8c21a54 | 430 | unsigned long off = drm_vma_node_start(&obj->vma_node); |
790f27e0 | 431 | int r; |
a8c21a54 T |
432 | |
433 | seq_printf(m, "%08x: %c %2d (%2d) %08lx %p %zd\n", | |
434 | etnaviv_obj->flags, is_active(etnaviv_obj) ? 'A' : 'I', | |
2c935bc5 | 435 | obj->name, kref_read(&obj->refcount), |
a8c21a54 T |
436 | off, etnaviv_obj->vaddr, obj->size); |
437 | ||
790f27e0 CK |
438 | r = dma_resv_lock(robj, NULL); |
439 | if (r) | |
440 | return; | |
441 | ||
442 | dma_resv_describe(robj, m); | |
443 | dma_resv_unlock(robj); | |
a8c21a54 T |
444 | } |
445 | ||
446 | void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv, | |
447 | struct seq_file *m) | |
448 | { | |
449 | struct etnaviv_gem_object *etnaviv_obj; | |
450 | int count = 0; | |
451 | size_t size = 0; | |
452 | ||
453 | mutex_lock(&priv->gem_lock); | |
454 | list_for_each_entry(etnaviv_obj, &priv->gem_list, gem_node) { | |
455 | struct drm_gem_object *obj = &etnaviv_obj->base; | |
456 | ||
457 | seq_puts(m, " "); | |
458 | etnaviv_gem_describe(obj, m); | |
459 | count++; | |
460 | size += obj->size; | |
461 | } | |
462 | mutex_unlock(&priv->gem_lock); | |
463 | ||
464 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
465 | } | |
466 | #endif | |
467 | ||
468 | static void etnaviv_gem_shmem_release(struct etnaviv_gem_object *etnaviv_obj) | |
469 | { | |
8c6e6188 | 470 | vunmap(etnaviv_obj->vaddr); |
a8c21a54 T |
471 | put_pages(etnaviv_obj); |
472 | } | |
473 | ||
474 | static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = { | |
475 | .get_pages = etnaviv_gem_shmem_get_pages, | |
476 | .release = etnaviv_gem_shmem_release, | |
a0a5ab3e | 477 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 478 | .mmap = etnaviv_gem_mmap_obj, |
a8c21a54 T |
479 | }; |
480 | ||
481 | void etnaviv_gem_free_object(struct drm_gem_object *obj) | |
482 | { | |
483 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
51841752 | 484 | struct etnaviv_drm_private *priv = obj->dev->dev_private; |
a8c21a54 T |
485 | struct etnaviv_vram_mapping *mapping, *tmp; |
486 | ||
487 | /* object should not be active */ | |
488 | WARN_ON(is_active(etnaviv_obj)); | |
489 | ||
51841752 | 490 | mutex_lock(&priv->gem_lock); |
a8c21a54 | 491 | list_del(&etnaviv_obj->gem_node); |
51841752 | 492 | mutex_unlock(&priv->gem_lock); |
a8c21a54 T |
493 | |
494 | list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list, | |
495 | obj_node) { | |
27b67278 | 496 | struct etnaviv_iommu_context *context = mapping->context; |
a8c21a54 T |
497 | |
498 | WARN_ON(mapping->use); | |
499 | ||
11ad6a1f | 500 | if (context) |
27b67278 | 501 | etnaviv_iommu_unmap_gem(context, mapping); |
a8c21a54 T |
502 | |
503 | list_del(&mapping->obj_node); | |
504 | kfree(mapping); | |
505 | } | |
506 | ||
507 | drm_gem_free_mmap_offset(obj); | |
508 | etnaviv_obj->ops->release(etnaviv_obj); | |
a8c21a54 T |
509 | drm_gem_object_release(obj); |
510 | ||
511 | kfree(etnaviv_obj); | |
512 | } | |
513 | ||
54f09288 | 514 | void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj) |
a8c21a54 T |
515 | { |
516 | struct etnaviv_drm_private *priv = dev->dev_private; | |
517 | struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); | |
518 | ||
519 | mutex_lock(&priv->gem_lock); | |
520 | list_add_tail(&etnaviv_obj->gem_node, &priv->gem_list); | |
521 | mutex_unlock(&priv->gem_lock); | |
a8c21a54 T |
522 | } |
523 | ||
a7730627 TZ |
524 | static const struct vm_operations_struct vm_ops = { |
525 | .fault = etnaviv_gem_fault, | |
526 | .open = drm_gem_vm_open, | |
527 | .close = drm_gem_vm_close, | |
528 | }; | |
529 | ||
530 | static const struct drm_gem_object_funcs etnaviv_gem_object_funcs = { | |
531 | .free = etnaviv_gem_free_object, | |
532 | .pin = etnaviv_gem_prime_pin, | |
533 | .unpin = etnaviv_gem_prime_unpin, | |
534 | .get_sg_table = etnaviv_gem_prime_get_sg_table, | |
535 | .vmap = etnaviv_gem_prime_vmap, | |
81fd23e2 | 536 | .mmap = etnaviv_gem_mmap, |
a7730627 TZ |
537 | .vm_ops = &vm_ops, |
538 | }; | |
539 | ||
a8c21a54 | 540 | static int etnaviv_gem_new_impl(struct drm_device *dev, u32 size, u32 flags, |
c6be8086 | 541 | const struct etnaviv_gem_ops *ops, struct drm_gem_object **obj) |
a8c21a54 T |
542 | { |
543 | struct etnaviv_gem_object *etnaviv_obj; | |
544 | unsigned sz = sizeof(*etnaviv_obj); | |
545 | bool valid = true; | |
546 | ||
547 | /* validate flags */ | |
548 | switch (flags & ETNA_BO_CACHE_MASK) { | |
549 | case ETNA_BO_UNCACHED: | |
550 | case ETNA_BO_CACHED: | |
551 | case ETNA_BO_WC: | |
552 | break; | |
553 | default: | |
554 | valid = false; | |
555 | } | |
556 | ||
557 | if (!valid) { | |
558 | dev_err(dev->dev, "invalid cache flag: %x\n", | |
559 | (flags & ETNA_BO_CACHE_MASK)); | |
560 | return -EINVAL; | |
561 | } | |
562 | ||
563 | etnaviv_obj = kzalloc(sz, GFP_KERNEL); | |
564 | if (!etnaviv_obj) | |
565 | return -ENOMEM; | |
566 | ||
567 | etnaviv_obj->flags = flags; | |
568 | etnaviv_obj->ops = ops; | |
a8c21a54 T |
569 | |
570 | mutex_init(&etnaviv_obj->lock); | |
571 | INIT_LIST_HEAD(&etnaviv_obj->vram_list); | |
572 | ||
573 | *obj = &etnaviv_obj->base; | |
a7730627 | 574 | (*obj)->funcs = &etnaviv_gem_object_funcs; |
a8c21a54 T |
575 | |
576 | return 0; | |
577 | } | |
578 | ||
cdd32563 LS |
579 | /* convenience method to construct a GEM buffer object, and userspace handle */ |
580 | int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
581 | u32 size, u32 flags, u32 *handle) | |
a8c21a54 | 582 | { |
b72af445 | 583 | struct etnaviv_drm_private *priv = dev->dev_private; |
a8c21a54 T |
584 | struct drm_gem_object *obj = NULL; |
585 | int ret; | |
586 | ||
587 | size = PAGE_ALIGN(size); | |
588 | ||
c6be8086 | 589 | ret = etnaviv_gem_new_impl(dev, size, flags, |
a8c21a54 T |
590 | &etnaviv_gem_shmem_ops, &obj); |
591 | if (ret) | |
592 | goto fail; | |
593 | ||
d6a8743d LS |
594 | lockdep_set_class(&to_etnaviv_bo(obj)->lock, &etnaviv_shm_lock_class); |
595 | ||
a8c21a54 | 596 | ret = drm_gem_object_init(dev, obj, size); |
a8c21a54 T |
597 | if (ret) |
598 | goto fail; | |
599 | ||
fd2450a7 LS |
600 | /* |
601 | * Our buffers are kept pinned, so allocating them from the MOVABLE | |
602 | * zone is a really bad idea, and conflicts with CMA. See comments | |
603 | * above new_inode() why this is required _and_ expected if you're | |
604 | * going to pin these pages. | |
605 | */ | |
b72af445 | 606 | mapping_set_gfp_mask(obj->filp->f_mapping, priv->shm_gfp_mask); |
fd2450a7 | 607 | |
54f09288 | 608 | etnaviv_gem_obj_add(dev, obj); |
a8c21a54 T |
609 | |
610 | ret = drm_gem_handle_create(file, obj, handle); | |
611 | ||
612 | /* drop reference from allocate - handle holds it now */ | |
cdd32563 | 613 | fail: |
6780bf32 | 614 | drm_gem_object_put(obj); |
a8c21a54 T |
615 | |
616 | return ret; | |
617 | } | |
618 | ||
a8c21a54 | 619 | int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags, |
c6be8086 | 620 | const struct etnaviv_gem_ops *ops, struct etnaviv_gem_object **res) |
a8c21a54 T |
621 | { |
622 | struct drm_gem_object *obj; | |
623 | int ret; | |
624 | ||
c6be8086 | 625 | ret = etnaviv_gem_new_impl(dev, size, flags, ops, &obj); |
a8c21a54 T |
626 | if (ret) |
627 | return ret; | |
628 | ||
629 | drm_gem_private_object_init(dev, obj, size); | |
630 | ||
631 | *res = to_etnaviv_bo(obj); | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
a8c21a54 T |
636 | static int etnaviv_gem_userptr_get_pages(struct etnaviv_gem_object *etnaviv_obj) |
637 | { | |
638 | struct page **pvec = NULL; | |
b2295c24 LS |
639 | struct etnaviv_gem_userptr *userptr = &etnaviv_obj->userptr; |
640 | int ret, pinned = 0, npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
7d96eb6a | 641 | unsigned int gup_flags = FOLL_LONGTERM; |
a8c21a54 | 642 | |
da1c55f1 | 643 | might_lock_read(¤t->mm->mmap_lock); |
783c06cb | 644 | |
b2295c24 LS |
645 | if (userptr->mm != current->mm) |
646 | return -EPERM; | |
a8c21a54 | 647 | |
b2295c24 LS |
648 | pvec = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); |
649 | if (!pvec) | |
650 | return -ENOMEM; | |
651 | ||
7d96eb6a DH |
652 | if (!userptr->ro) |
653 | gup_flags |= FOLL_WRITE; | |
654 | ||
b2295c24 LS |
655 | do { |
656 | unsigned num_pages = npages - pinned; | |
657 | uint64_t ptr = userptr->ptr + pinned * PAGE_SIZE; | |
658 | struct page **pages = pvec + pinned; | |
a8c21a54 | 659 | |
7d96eb6a | 660 | ret = pin_user_pages_fast(ptr, num_pages, gup_flags, pages); |
b2295c24 | 661 | if (ret < 0) { |
86824e60 | 662 | unpin_user_pages(pvec, pinned); |
2098105e | 663 | kvfree(pvec); |
b2295c24 | 664 | return ret; |
a8c21a54 T |
665 | } |
666 | ||
b2295c24 | 667 | pinned += ret; |
a8c21a54 | 668 | |
b2295c24 | 669 | } while (pinned < npages); |
a8c21a54 | 670 | |
b2295c24 | 671 | etnaviv_obj->pages = pvec; |
a8c21a54 | 672 | |
b2295c24 | 673 | return 0; |
a8c21a54 T |
674 | } |
675 | ||
676 | static void etnaviv_gem_userptr_release(struct etnaviv_gem_object *etnaviv_obj) | |
677 | { | |
678 | if (etnaviv_obj->sgt) { | |
679 | etnaviv_gem_scatterlist_unmap(etnaviv_obj); | |
680 | sg_free_table(etnaviv_obj->sgt); | |
681 | kfree(etnaviv_obj->sgt); | |
682 | } | |
683 | if (etnaviv_obj->pages) { | |
684 | int npages = etnaviv_obj->base.size >> PAGE_SHIFT; | |
685 | ||
86824e60 | 686 | unpin_user_pages(etnaviv_obj->pages, npages); |
2098105e | 687 | kvfree(etnaviv_obj->pages); |
a8c21a54 | 688 | } |
a8c21a54 T |
689 | } |
690 | ||
a10e2bde LS |
691 | static int etnaviv_gem_userptr_mmap_obj(struct etnaviv_gem_object *etnaviv_obj, |
692 | struct vm_area_struct *vma) | |
693 | { | |
694 | return -EINVAL; | |
695 | } | |
696 | ||
a8c21a54 T |
697 | static const struct etnaviv_gem_ops etnaviv_gem_userptr_ops = { |
698 | .get_pages = etnaviv_gem_userptr_get_pages, | |
699 | .release = etnaviv_gem_userptr_release, | |
a0a5ab3e | 700 | .vmap = etnaviv_gem_vmap_impl, |
a10e2bde | 701 | .mmap = etnaviv_gem_userptr_mmap_obj, |
a8c21a54 T |
702 | }; |
703 | ||
704 | int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file, | |
705 | uintptr_t ptr, u32 size, u32 flags, u32 *handle) | |
706 | { | |
707 | struct etnaviv_gem_object *etnaviv_obj; | |
708 | int ret; | |
709 | ||
c6be8086 | 710 | ret = etnaviv_gem_new_private(dev, size, ETNA_BO_CACHED, |
a8c21a54 T |
711 | &etnaviv_gem_userptr_ops, &etnaviv_obj); |
712 | if (ret) | |
713 | return ret; | |
714 | ||
d6a8743d LS |
715 | lockdep_set_class(&etnaviv_obj->lock, &etnaviv_userptr_lock_class); |
716 | ||
a8c21a54 | 717 | etnaviv_obj->userptr.ptr = ptr; |
b2295c24 | 718 | etnaviv_obj->userptr.mm = current->mm; |
a8c21a54 | 719 | etnaviv_obj->userptr.ro = !(flags & ETNA_USERPTR_WRITE); |
a8c21a54 | 720 | |
54f09288 | 721 | etnaviv_gem_obj_add(dev, &etnaviv_obj->base); |
a8c21a54 T |
722 | |
723 | ret = drm_gem_handle_create(file, &etnaviv_obj->base, handle); | |
54f09288 | 724 | |
a8c21a54 | 725 | /* drop reference from allocate - handle holds it now */ |
6780bf32 | 726 | drm_gem_object_put(&etnaviv_obj->base); |
a8c21a54 T |
727 | return ret; |
728 | } |