Commit | Line | Data |
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c8afe684 RC |
1 | /* |
2 | * Copyright (C) 2013 Red Hat | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include <linux/spinlock.h> | |
19 | #include <linux/shmem_fs.h> | |
05b84911 | 20 | #include <linux/dma-buf.h> |
c8afe684 RC |
21 | |
22 | #include "msm_drv.h" | |
23 | #include "msm_gem.h" | |
7198e6b0 | 24 | #include "msm_gpu.h" |
871d812a | 25 | #include "msm_mmu.h" |
c8afe684 | 26 | |
871d812a RC |
27 | static dma_addr_t physaddr(struct drm_gem_object *obj) |
28 | { | |
29 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
30 | struct msm_drm_private *priv = obj->dev->dev_private; | |
31 | return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + | |
32 | priv->vram.paddr; | |
33 | } | |
34 | ||
35 | /* allocate pages from VRAM carveout, used when no IOMMU: */ | |
36 | static struct page **get_pages_vram(struct drm_gem_object *obj, | |
37 | int npages) | |
38 | { | |
39 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
40 | struct msm_drm_private *priv = obj->dev->dev_private; | |
41 | dma_addr_t paddr; | |
42 | struct page **p; | |
43 | int ret, i; | |
44 | ||
45 | p = drm_malloc_ab(npages, sizeof(struct page *)); | |
46 | if (!p) | |
47 | return ERR_PTR(-ENOMEM); | |
48 | ||
49 | ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, | |
50 | npages, 0, DRM_MM_SEARCH_DEFAULT); | |
51 | if (ret) { | |
52 | drm_free_large(p); | |
53 | return ERR_PTR(ret); | |
54 | } | |
55 | ||
56 | paddr = physaddr(obj); | |
57 | for (i = 0; i < npages; i++) { | |
58 | p[i] = phys_to_page(paddr); | |
59 | paddr += PAGE_SIZE; | |
60 | } | |
61 | ||
62 | return p; | |
63 | } | |
c8afe684 RC |
64 | |
65 | /* called with dev->struct_mutex held */ | |
66 | static struct page **get_pages(struct drm_gem_object *obj) | |
67 | { | |
68 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
69 | ||
70 | if (!msm_obj->pages) { | |
71 | struct drm_device *dev = obj->dev; | |
871d812a | 72 | struct page **p; |
c8afe684 RC |
73 | int npages = obj->size >> PAGE_SHIFT; |
74 | ||
871d812a RC |
75 | if (iommu_present(&platform_bus_type)) |
76 | p = drm_gem_get_pages(obj, 0); | |
77 | else | |
78 | p = get_pages_vram(obj, npages); | |
79 | ||
c8afe684 RC |
80 | if (IS_ERR(p)) { |
81 | dev_err(dev->dev, "could not get pages: %ld\n", | |
82 | PTR_ERR(p)); | |
83 | return p; | |
84 | } | |
85 | ||
86 | msm_obj->sgt = drm_prime_pages_to_sg(p, npages); | |
1f70e079 | 87 | if (IS_ERR(msm_obj->sgt)) { |
c8afe684 | 88 | dev_err(dev->dev, "failed to allocate sgt\n"); |
1f70e079 | 89 | return ERR_CAST(msm_obj->sgt); |
c8afe684 RC |
90 | } |
91 | ||
92 | msm_obj->pages = p; | |
93 | ||
94 | /* For non-cached buffers, ensure the new pages are clean | |
95 | * because display controller, GPU, etc. are not coherent: | |
96 | */ | |
97 | if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) | |
98 | dma_map_sg(dev->dev, msm_obj->sgt->sgl, | |
99 | msm_obj->sgt->nents, DMA_BIDIRECTIONAL); | |
100 | } | |
101 | ||
102 | return msm_obj->pages; | |
103 | } | |
104 | ||
105 | static void put_pages(struct drm_gem_object *obj) | |
106 | { | |
107 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
108 | ||
109 | if (msm_obj->pages) { | |
110 | /* For non-cached buffers, ensure the new pages are clean | |
111 | * because display controller, GPU, etc. are not coherent: | |
112 | */ | |
113 | if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) | |
114 | dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, | |
115 | msm_obj->sgt->nents, DMA_BIDIRECTIONAL); | |
116 | sg_free_table(msm_obj->sgt); | |
117 | kfree(msm_obj->sgt); | |
118 | ||
871d812a RC |
119 | if (iommu_present(&platform_bus_type)) |
120 | drm_gem_put_pages(obj, msm_obj->pages, true, false); | |
121 | else | |
122 | drm_mm_remove_node(msm_obj->vram_node); | |
123 | ||
c8afe684 RC |
124 | msm_obj->pages = NULL; |
125 | } | |
126 | } | |
127 | ||
05b84911 RC |
128 | struct page **msm_gem_get_pages(struct drm_gem_object *obj) |
129 | { | |
130 | struct drm_device *dev = obj->dev; | |
131 | struct page **p; | |
132 | mutex_lock(&dev->struct_mutex); | |
133 | p = get_pages(obj); | |
134 | mutex_unlock(&dev->struct_mutex); | |
135 | return p; | |
136 | } | |
137 | ||
138 | void msm_gem_put_pages(struct drm_gem_object *obj) | |
139 | { | |
140 | /* when we start tracking the pin count, then do something here */ | |
141 | } | |
142 | ||
c8afe684 RC |
143 | int msm_gem_mmap_obj(struct drm_gem_object *obj, |
144 | struct vm_area_struct *vma) | |
145 | { | |
146 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
147 | ||
148 | vma->vm_flags &= ~VM_PFNMAP; | |
149 | vma->vm_flags |= VM_MIXEDMAP; | |
150 | ||
151 | if (msm_obj->flags & MSM_BO_WC) { | |
152 | vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
153 | } else if (msm_obj->flags & MSM_BO_UNCACHED) { | |
154 | vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
155 | } else { | |
156 | /* | |
157 | * Shunt off cached objs to shmem file so they have their own | |
158 | * address_space (so unmap_mapping_range does what we want, | |
159 | * in particular in the case of mmap'd dmabufs) | |
160 | */ | |
161 | fput(vma->vm_file); | |
162 | get_file(obj->filp); | |
163 | vma->vm_pgoff = 0; | |
164 | vma->vm_file = obj->filp; | |
165 | ||
166 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
173 | { | |
174 | int ret; | |
175 | ||
176 | ret = drm_gem_mmap(filp, vma); | |
177 | if (ret) { | |
178 | DBG("mmap failed: %d", ret); | |
179 | return ret; | |
180 | } | |
181 | ||
182 | return msm_gem_mmap_obj(vma->vm_private_data, vma); | |
183 | } | |
184 | ||
185 | int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
186 | { | |
187 | struct drm_gem_object *obj = vma->vm_private_data; | |
c8afe684 RC |
188 | struct drm_device *dev = obj->dev; |
189 | struct page **pages; | |
190 | unsigned long pfn; | |
191 | pgoff_t pgoff; | |
192 | int ret; | |
193 | ||
194 | /* Make sure we don't parallel update on a fault, nor move or remove | |
195 | * something from beneath our feet | |
196 | */ | |
197 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
198 | if (ret) | |
199 | goto out; | |
200 | ||
201 | /* make sure we have pages attached now */ | |
202 | pages = get_pages(obj); | |
203 | if (IS_ERR(pages)) { | |
204 | ret = PTR_ERR(pages); | |
205 | goto out_unlock; | |
206 | } | |
207 | ||
208 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
209 | pgoff = ((unsigned long)vmf->virtual_address - | |
210 | vma->vm_start) >> PAGE_SHIFT; | |
211 | ||
871d812a | 212 | pfn = page_to_pfn(pages[pgoff]); |
c8afe684 RC |
213 | |
214 | VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, | |
215 | pfn, pfn << PAGE_SHIFT); | |
216 | ||
217 | ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn); | |
218 | ||
219 | out_unlock: | |
220 | mutex_unlock(&dev->struct_mutex); | |
221 | out: | |
222 | switch (ret) { | |
223 | case -EAGAIN: | |
c8afe684 RC |
224 | case 0: |
225 | case -ERESTARTSYS: | |
226 | case -EINTR: | |
505886d5 RC |
227 | case -EBUSY: |
228 | /* | |
229 | * EBUSY is ok: this just means that another thread | |
230 | * already did the job. | |
231 | */ | |
c8afe684 RC |
232 | return VM_FAULT_NOPAGE; |
233 | case -ENOMEM: | |
234 | return VM_FAULT_OOM; | |
235 | default: | |
236 | return VM_FAULT_SIGBUS; | |
237 | } | |
238 | } | |
239 | ||
240 | /** get mmap offset */ | |
241 | static uint64_t mmap_offset(struct drm_gem_object *obj) | |
242 | { | |
243 | struct drm_device *dev = obj->dev; | |
244 | int ret; | |
245 | ||
246 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
247 | ||
248 | /* Make it mmapable */ | |
249 | ret = drm_gem_create_mmap_offset(obj); | |
250 | ||
251 | if (ret) { | |
252 | dev_err(dev->dev, "could not allocate mmap offset\n"); | |
253 | return 0; | |
254 | } | |
255 | ||
256 | return drm_vma_node_offset_addr(&obj->vma_node); | |
257 | } | |
258 | ||
259 | uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) | |
260 | { | |
261 | uint64_t offset; | |
262 | mutex_lock(&obj->dev->struct_mutex); | |
263 | offset = mmap_offset(obj); | |
264 | mutex_unlock(&obj->dev->struct_mutex); | |
265 | return offset; | |
266 | } | |
267 | ||
c8afe684 RC |
268 | /* should be called under struct_mutex.. although it can be called |
269 | * from atomic context without struct_mutex to acquire an extra | |
270 | * iova ref if you know one is already held. | |
271 | * | |
272 | * That means when I do eventually need to add support for unpinning | |
273 | * the refcnt counter needs to be atomic_t. | |
274 | */ | |
275 | int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, | |
276 | uint32_t *iova) | |
277 | { | |
278 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
279 | int ret = 0; | |
280 | ||
281 | if (!msm_obj->domain[id].iova) { | |
282 | struct msm_drm_private *priv = obj->dev->dev_private; | |
871d812a RC |
283 | struct msm_mmu *mmu = priv->mmus[id]; |
284 | struct page **pages = get_pages(obj); | |
285 | ||
c8afe684 RC |
286 | if (IS_ERR(pages)) |
287 | return PTR_ERR(pages); | |
871d812a RC |
288 | |
289 | if (iommu_present(&platform_bus_type)) { | |
290 | uint32_t offset = (uint32_t)mmap_offset(obj); | |
291 | ret = mmu->funcs->map(mmu, offset, msm_obj->sgt, | |
292 | obj->size, IOMMU_READ | IOMMU_WRITE); | |
293 | msm_obj->domain[id].iova = offset; | |
294 | } else { | |
295 | msm_obj->domain[id].iova = physaddr(obj); | |
296 | } | |
c8afe684 RC |
297 | } |
298 | ||
299 | if (!ret) | |
300 | *iova = msm_obj->domain[id].iova; | |
301 | ||
302 | return ret; | |
303 | } | |
304 | ||
305 | int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) | |
306 | { | |
edd4fc63 | 307 | struct msm_gem_object *msm_obj = to_msm_bo(obj); |
c8afe684 | 308 | int ret; |
edd4fc63 RC |
309 | |
310 | /* this is safe right now because we don't unmap until the | |
311 | * bo is deleted: | |
312 | */ | |
313 | if (msm_obj->domain[id].iova) { | |
314 | *iova = msm_obj->domain[id].iova; | |
315 | return 0; | |
316 | } | |
317 | ||
c8afe684 RC |
318 | mutex_lock(&obj->dev->struct_mutex); |
319 | ret = msm_gem_get_iova_locked(obj, id, iova); | |
320 | mutex_unlock(&obj->dev->struct_mutex); | |
321 | return ret; | |
322 | } | |
323 | ||
324 | void msm_gem_put_iova(struct drm_gem_object *obj, int id) | |
325 | { | |
326 | // XXX TODO .. | |
327 | // NOTE: probably don't need a _locked() version.. we wouldn't | |
328 | // normally unmap here, but instead just mark that it could be | |
329 | // unmapped (if the iova refcnt drops to zero), but then later | |
330 | // if another _get_iova_locked() fails we can start unmapping | |
331 | // things that are no longer needed.. | |
332 | } | |
333 | ||
334 | int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, | |
335 | struct drm_mode_create_dumb *args) | |
336 | { | |
337 | args->pitch = align_pitch(args->width, args->bpp); | |
338 | args->size = PAGE_ALIGN(args->pitch * args->height); | |
339 | return msm_gem_new_handle(dev, file, args->size, | |
340 | MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); | |
341 | } | |
342 | ||
c8afe684 RC |
343 | int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, |
344 | uint32_t handle, uint64_t *offset) | |
345 | { | |
346 | struct drm_gem_object *obj; | |
347 | int ret = 0; | |
348 | ||
349 | /* GEM does all our handle to object mapping */ | |
350 | obj = drm_gem_object_lookup(dev, file, handle); | |
351 | if (obj == NULL) { | |
352 | ret = -ENOENT; | |
353 | goto fail; | |
354 | } | |
355 | ||
356 | *offset = msm_gem_mmap_offset(obj); | |
357 | ||
358 | drm_gem_object_unreference_unlocked(obj); | |
359 | ||
360 | fail: | |
361 | return ret; | |
362 | } | |
363 | ||
364 | void *msm_gem_vaddr_locked(struct drm_gem_object *obj) | |
365 | { | |
366 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
367 | WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); | |
368 | if (!msm_obj->vaddr) { | |
369 | struct page **pages = get_pages(obj); | |
370 | if (IS_ERR(pages)) | |
371 | return ERR_CAST(pages); | |
372 | msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, | |
373 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
374 | } | |
375 | return msm_obj->vaddr; | |
376 | } | |
377 | ||
378 | void *msm_gem_vaddr(struct drm_gem_object *obj) | |
379 | { | |
380 | void *ret; | |
381 | mutex_lock(&obj->dev->struct_mutex); | |
382 | ret = msm_gem_vaddr_locked(obj); | |
383 | mutex_unlock(&obj->dev->struct_mutex); | |
384 | return ret; | |
385 | } | |
386 | ||
edd4fc63 RC |
387 | /* setup callback for when bo is no longer busy.. |
388 | * TODO probably want to differentiate read vs write.. | |
389 | */ | |
390 | int msm_gem_queue_inactive_cb(struct drm_gem_object *obj, | |
391 | struct msm_fence_cb *cb) | |
c8afe684 RC |
392 | { |
393 | struct drm_device *dev = obj->dev; | |
394 | struct msm_drm_private *priv = dev->dev_private; | |
7198e6b0 RC |
395 | struct msm_gem_object *msm_obj = to_msm_bo(obj); |
396 | int ret = 0; | |
397 | ||
398 | mutex_lock(&dev->struct_mutex); | |
edd4fc63 | 399 | if (!list_empty(&cb->work.entry)) { |
7198e6b0 RC |
400 | ret = -EINVAL; |
401 | } else if (is_active(msm_obj)) { | |
edd4fc63 RC |
402 | cb->fence = max(msm_obj->read_fence, msm_obj->write_fence); |
403 | list_add_tail(&cb->work.entry, &priv->fence_cbs); | |
7198e6b0 | 404 | } else { |
edd4fc63 | 405 | queue_work(priv->wq, &cb->work); |
7198e6b0 RC |
406 | } |
407 | mutex_unlock(&dev->struct_mutex); | |
408 | ||
409 | return ret; | |
410 | } | |
411 | ||
412 | void msm_gem_move_to_active(struct drm_gem_object *obj, | |
bf6811f3 | 413 | struct msm_gpu *gpu, bool write, uint32_t fence) |
7198e6b0 RC |
414 | { |
415 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
416 | msm_obj->gpu = gpu; | |
bf6811f3 RC |
417 | if (write) |
418 | msm_obj->write_fence = fence; | |
419 | else | |
420 | msm_obj->read_fence = fence; | |
7198e6b0 RC |
421 | list_del_init(&msm_obj->mm_list); |
422 | list_add_tail(&msm_obj->mm_list, &gpu->active_list); | |
423 | } | |
424 | ||
425 | void msm_gem_move_to_inactive(struct drm_gem_object *obj) | |
426 | { | |
427 | struct drm_device *dev = obj->dev; | |
428 | struct msm_drm_private *priv = dev->dev_private; | |
429 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
430 | ||
431 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
432 | ||
433 | msm_obj->gpu = NULL; | |
bf6811f3 RC |
434 | msm_obj->read_fence = 0; |
435 | msm_obj->write_fence = 0; | |
7198e6b0 RC |
436 | list_del_init(&msm_obj->mm_list); |
437 | list_add_tail(&msm_obj->mm_list, &priv->inactive_list); | |
7198e6b0 RC |
438 | } |
439 | ||
440 | int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, | |
441 | struct timespec *timeout) | |
442 | { | |
443 | struct drm_device *dev = obj->dev; | |
444 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
445 | int ret = 0; | |
446 | ||
f816f272 | 447 | if (is_active(msm_obj)) { |
bf6811f3 | 448 | uint32_t fence = 0; |
f816f272 | 449 | |
bf6811f3 RC |
450 | if (op & MSM_PREP_READ) |
451 | fence = msm_obj->write_fence; | |
452 | if (op & MSM_PREP_WRITE) | |
453 | fence = max(fence, msm_obj->read_fence); | |
f816f272 RC |
454 | if (op & MSM_PREP_NOSYNC) |
455 | timeout = NULL; | |
456 | ||
bf6811f3 RC |
457 | ret = msm_wait_fence_interruptable(dev, fence, timeout); |
458 | } | |
7198e6b0 RC |
459 | |
460 | /* TODO cache maintenance */ | |
c8afe684 | 461 | |
7198e6b0 RC |
462 | return ret; |
463 | } | |
c8afe684 | 464 | |
7198e6b0 RC |
465 | int msm_gem_cpu_fini(struct drm_gem_object *obj) |
466 | { | |
467 | /* TODO cache maintenance */ | |
c8afe684 RC |
468 | return 0; |
469 | } | |
470 | ||
471 | #ifdef CONFIG_DEBUG_FS | |
472 | void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) | |
473 | { | |
474 | struct drm_device *dev = obj->dev; | |
475 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
476 | uint64_t off = drm_vma_node_start(&obj->vma_node); | |
477 | ||
478 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
bf6811f3 | 479 | seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %d\n", |
7198e6b0 | 480 | msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', |
bf6811f3 RC |
481 | msm_obj->read_fence, msm_obj->write_fence, |
482 | obj->name, obj->refcount.refcount.counter, | |
c8afe684 RC |
483 | off, msm_obj->vaddr, obj->size); |
484 | } | |
485 | ||
486 | void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) | |
487 | { | |
488 | struct msm_gem_object *msm_obj; | |
489 | int count = 0; | |
490 | size_t size = 0; | |
491 | ||
492 | list_for_each_entry(msm_obj, list, mm_list) { | |
493 | struct drm_gem_object *obj = &msm_obj->base; | |
494 | seq_printf(m, " "); | |
495 | msm_gem_describe(obj, m); | |
496 | count++; | |
497 | size += obj->size; | |
498 | } | |
499 | ||
500 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
501 | } | |
502 | #endif | |
503 | ||
504 | void msm_gem_free_object(struct drm_gem_object *obj) | |
505 | { | |
506 | struct drm_device *dev = obj->dev; | |
871d812a | 507 | struct msm_drm_private *priv = obj->dev->dev_private; |
c8afe684 RC |
508 | struct msm_gem_object *msm_obj = to_msm_bo(obj); |
509 | int id; | |
510 | ||
511 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
512 | ||
7198e6b0 RC |
513 | /* object should not be on active list: */ |
514 | WARN_ON(is_active(msm_obj)); | |
515 | ||
c8afe684 RC |
516 | list_del(&msm_obj->mm_list); |
517 | ||
518 | for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { | |
871d812a RC |
519 | struct msm_mmu *mmu = priv->mmus[id]; |
520 | if (mmu && msm_obj->domain[id].iova) { | |
c8afe684 | 521 | uint32_t offset = (uint32_t)mmap_offset(obj); |
871d812a | 522 | mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size); |
c8afe684 RC |
523 | } |
524 | } | |
525 | ||
526 | drm_gem_free_mmap_offset(obj); | |
527 | ||
05b84911 RC |
528 | if (obj->import_attach) { |
529 | if (msm_obj->vaddr) | |
530 | dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); | |
531 | ||
532 | /* Don't drop the pages for imported dmabuf, as they are not | |
533 | * ours, just free the array we allocated: | |
534 | */ | |
535 | if (msm_obj->pages) | |
536 | drm_free_large(msm_obj->pages); | |
c8afe684 | 537 | |
05b84911 RC |
538 | } else { |
539 | if (msm_obj->vaddr) | |
540 | vunmap(msm_obj->vaddr); | |
541 | put_pages(obj); | |
542 | } | |
c8afe684 | 543 | |
7198e6b0 RC |
544 | if (msm_obj->resv == &msm_obj->_resv) |
545 | reservation_object_fini(msm_obj->resv); | |
546 | ||
c8afe684 RC |
547 | drm_gem_object_release(obj); |
548 | ||
549 | kfree(msm_obj); | |
550 | } | |
551 | ||
552 | /* convenience method to construct a GEM buffer object, and userspace handle */ | |
553 | int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
554 | uint32_t size, uint32_t flags, uint32_t *handle) | |
555 | { | |
556 | struct drm_gem_object *obj; | |
557 | int ret; | |
558 | ||
559 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
560 | if (ret) | |
561 | return ret; | |
562 | ||
563 | obj = msm_gem_new(dev, size, flags); | |
564 | ||
565 | mutex_unlock(&dev->struct_mutex); | |
566 | ||
567 | if (IS_ERR(obj)) | |
568 | return PTR_ERR(obj); | |
569 | ||
570 | ret = drm_gem_handle_create(file, obj, handle); | |
571 | ||
572 | /* drop reference from allocate - handle holds it now */ | |
573 | drm_gem_object_unreference_unlocked(obj); | |
574 | ||
575 | return ret; | |
576 | } | |
577 | ||
05b84911 RC |
578 | static int msm_gem_new_impl(struct drm_device *dev, |
579 | uint32_t size, uint32_t flags, | |
580 | struct drm_gem_object **obj) | |
c8afe684 RC |
581 | { |
582 | struct msm_drm_private *priv = dev->dev_private; | |
583 | struct msm_gem_object *msm_obj; | |
871d812a | 584 | unsigned sz; |
c8afe684 RC |
585 | |
586 | switch (flags & MSM_BO_CACHE_MASK) { | |
587 | case MSM_BO_UNCACHED: | |
588 | case MSM_BO_CACHED: | |
589 | case MSM_BO_WC: | |
590 | break; | |
591 | default: | |
592 | dev_err(dev->dev, "invalid cache flag: %x\n", | |
593 | (flags & MSM_BO_CACHE_MASK)); | |
05b84911 | 594 | return -EINVAL; |
c8afe684 RC |
595 | } |
596 | ||
871d812a RC |
597 | sz = sizeof(*msm_obj); |
598 | if (!iommu_present(&platform_bus_type)) | |
599 | sz += sizeof(struct drm_mm_node); | |
600 | ||
601 | msm_obj = kzalloc(sz, GFP_KERNEL); | |
05b84911 RC |
602 | if (!msm_obj) |
603 | return -ENOMEM; | |
c8afe684 | 604 | |
871d812a RC |
605 | if (!iommu_present(&platform_bus_type)) |
606 | msm_obj->vram_node = (void *)&msm_obj[1]; | |
607 | ||
c8afe684 RC |
608 | msm_obj->flags = flags; |
609 | ||
7198e6b0 RC |
610 | msm_obj->resv = &msm_obj->_resv; |
611 | reservation_object_init(msm_obj->resv); | |
c8afe684 | 612 | |
7198e6b0 | 613 | INIT_LIST_HEAD(&msm_obj->submit_entry); |
c8afe684 RC |
614 | list_add_tail(&msm_obj->mm_list, &priv->inactive_list); |
615 | ||
05b84911 RC |
616 | *obj = &msm_obj->base; |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | struct drm_gem_object *msm_gem_new(struct drm_device *dev, | |
622 | uint32_t size, uint32_t flags) | |
623 | { | |
871d812a | 624 | struct drm_gem_object *obj = NULL; |
05b84911 RC |
625 | int ret; |
626 | ||
627 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
628 | ||
629 | size = PAGE_ALIGN(size); | |
630 | ||
631 | ret = msm_gem_new_impl(dev, size, flags, &obj); | |
632 | if (ret) | |
633 | goto fail; | |
634 | ||
871d812a RC |
635 | if (iommu_present(&platform_bus_type)) { |
636 | ret = drm_gem_object_init(dev, obj, size); | |
637 | if (ret) | |
638 | goto fail; | |
639 | } else { | |
640 | drm_gem_private_object_init(dev, obj, size); | |
641 | } | |
05b84911 RC |
642 | |
643 | return obj; | |
644 | ||
645 | fail: | |
646 | if (obj) | |
9999f105 | 647 | drm_gem_object_unreference(obj); |
05b84911 RC |
648 | |
649 | return ERR_PTR(ret); | |
650 | } | |
651 | ||
652 | struct drm_gem_object *msm_gem_import(struct drm_device *dev, | |
653 | uint32_t size, struct sg_table *sgt) | |
654 | { | |
655 | struct msm_gem_object *msm_obj; | |
656 | struct drm_gem_object *obj; | |
657 | int ret, npages; | |
658 | ||
871d812a RC |
659 | /* if we don't have IOMMU, don't bother pretending we can import: */ |
660 | if (!iommu_present(&platform_bus_type)) { | |
661 | dev_err(dev->dev, "cannot import without IOMMU\n"); | |
662 | return ERR_PTR(-EINVAL); | |
663 | } | |
664 | ||
05b84911 RC |
665 | size = PAGE_ALIGN(size); |
666 | ||
667 | ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj); | |
668 | if (ret) | |
669 | goto fail; | |
670 | ||
671 | drm_gem_private_object_init(dev, obj, size); | |
672 | ||
673 | npages = size / PAGE_SIZE; | |
674 | ||
675 | msm_obj = to_msm_bo(obj); | |
676 | msm_obj->sgt = sgt; | |
677 | msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); | |
678 | if (!msm_obj->pages) { | |
679 | ret = -ENOMEM; | |
680 | goto fail; | |
681 | } | |
682 | ||
683 | ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); | |
684 | if (ret) | |
685 | goto fail; | |
686 | ||
c8afe684 RC |
687 | return obj; |
688 | ||
689 | fail: | |
690 | if (obj) | |
691 | drm_gem_object_unreference_unlocked(obj); | |
692 | ||
693 | return ERR_PTR(ret); | |
694 | } |