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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> |
01c8f1c4 | 21 | #include <linux/pfn_t.h> |
c8afe684 RC |
22 | |
23 | #include "msm_drv.h" | |
fde5de6c | 24 | #include "msm_fence.h" |
c8afe684 | 25 | #include "msm_gem.h" |
7198e6b0 | 26 | #include "msm_gpu.h" |
871d812a | 27 | #include "msm_mmu.h" |
c8afe684 | 28 | |
871d812a RC |
29 | static dma_addr_t physaddr(struct drm_gem_object *obj) |
30 | { | |
31 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
32 | struct msm_drm_private *priv = obj->dev->dev_private; | |
33 | return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) + | |
34 | priv->vram.paddr; | |
35 | } | |
36 | ||
072f1f91 RC |
37 | static bool use_pages(struct drm_gem_object *obj) |
38 | { | |
39 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
40 | return !msm_obj->vram_node; | |
41 | } | |
42 | ||
871d812a RC |
43 | /* allocate pages from VRAM carveout, used when no IOMMU: */ |
44 | static struct page **get_pages_vram(struct drm_gem_object *obj, | |
45 | int npages) | |
46 | { | |
47 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
48 | struct msm_drm_private *priv = obj->dev->dev_private; | |
49 | dma_addr_t paddr; | |
50 | struct page **p; | |
51 | int ret, i; | |
52 | ||
53 | p = drm_malloc_ab(npages, sizeof(struct page *)); | |
54 | if (!p) | |
55 | return ERR_PTR(-ENOMEM); | |
56 | ||
57 | ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, | |
58 | npages, 0, DRM_MM_SEARCH_DEFAULT); | |
59 | if (ret) { | |
60 | drm_free_large(p); | |
61 | return ERR_PTR(ret); | |
62 | } | |
63 | ||
64 | paddr = physaddr(obj); | |
65 | for (i = 0; i < npages; i++) { | |
66 | p[i] = phys_to_page(paddr); | |
67 | paddr += PAGE_SIZE; | |
68 | } | |
69 | ||
70 | return p; | |
71 | } | |
c8afe684 RC |
72 | |
73 | /* called with dev->struct_mutex held */ | |
74 | static struct page **get_pages(struct drm_gem_object *obj) | |
75 | { | |
76 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
77 | ||
78 | if (!msm_obj->pages) { | |
79 | struct drm_device *dev = obj->dev; | |
871d812a | 80 | struct page **p; |
c8afe684 RC |
81 | int npages = obj->size >> PAGE_SHIFT; |
82 | ||
072f1f91 | 83 | if (use_pages(obj)) |
0cdbe8ac | 84 | p = drm_gem_get_pages(obj); |
871d812a RC |
85 | else |
86 | p = get_pages_vram(obj, npages); | |
87 | ||
c8afe684 RC |
88 | if (IS_ERR(p)) { |
89 | dev_err(dev->dev, "could not get pages: %ld\n", | |
90 | PTR_ERR(p)); | |
91 | return p; | |
92 | } | |
93 | ||
94 | msm_obj->sgt = drm_prime_pages_to_sg(p, npages); | |
1f70e079 | 95 | if (IS_ERR(msm_obj->sgt)) { |
c8afe684 | 96 | dev_err(dev->dev, "failed to allocate sgt\n"); |
1f70e079 | 97 | return ERR_CAST(msm_obj->sgt); |
c8afe684 RC |
98 | } |
99 | ||
100 | msm_obj->pages = p; | |
101 | ||
102 | /* For non-cached buffers, ensure the new pages are clean | |
103 | * because display controller, GPU, etc. are not coherent: | |
104 | */ | |
105 | if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) | |
106 | dma_map_sg(dev->dev, msm_obj->sgt->sgl, | |
107 | msm_obj->sgt->nents, DMA_BIDIRECTIONAL); | |
108 | } | |
109 | ||
110 | return msm_obj->pages; | |
111 | } | |
112 | ||
113 | static void put_pages(struct drm_gem_object *obj) | |
114 | { | |
115 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
116 | ||
117 | if (msm_obj->pages) { | |
118 | /* For non-cached buffers, ensure the new pages are clean | |
119 | * because display controller, GPU, etc. are not coherent: | |
120 | */ | |
121 | if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED)) | |
122 | dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl, | |
123 | msm_obj->sgt->nents, DMA_BIDIRECTIONAL); | |
124 | sg_free_table(msm_obj->sgt); | |
125 | kfree(msm_obj->sgt); | |
126 | ||
072f1f91 | 127 | if (use_pages(obj)) |
871d812a | 128 | drm_gem_put_pages(obj, msm_obj->pages, true, false); |
1ffa2425 | 129 | else { |
871d812a | 130 | drm_mm_remove_node(msm_obj->vram_node); |
1ffa2425 MR |
131 | drm_free_large(msm_obj->pages); |
132 | } | |
871d812a | 133 | |
c8afe684 RC |
134 | msm_obj->pages = NULL; |
135 | } | |
136 | } | |
137 | ||
05b84911 RC |
138 | struct page **msm_gem_get_pages(struct drm_gem_object *obj) |
139 | { | |
140 | struct drm_device *dev = obj->dev; | |
141 | struct page **p; | |
142 | mutex_lock(&dev->struct_mutex); | |
143 | p = get_pages(obj); | |
144 | mutex_unlock(&dev->struct_mutex); | |
145 | return p; | |
146 | } | |
147 | ||
148 | void msm_gem_put_pages(struct drm_gem_object *obj) | |
149 | { | |
150 | /* when we start tracking the pin count, then do something here */ | |
151 | } | |
152 | ||
c8afe684 RC |
153 | int msm_gem_mmap_obj(struct drm_gem_object *obj, |
154 | struct vm_area_struct *vma) | |
155 | { | |
156 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
157 | ||
158 | vma->vm_flags &= ~VM_PFNMAP; | |
159 | vma->vm_flags |= VM_MIXEDMAP; | |
160 | ||
161 | if (msm_obj->flags & MSM_BO_WC) { | |
162 | vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
163 | } else if (msm_obj->flags & MSM_BO_UNCACHED) { | |
164 | vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
165 | } else { | |
166 | /* | |
167 | * Shunt off cached objs to shmem file so they have their own | |
168 | * address_space (so unmap_mapping_range does what we want, | |
169 | * in particular in the case of mmap'd dmabufs) | |
170 | */ | |
171 | fput(vma->vm_file); | |
172 | get_file(obj->filp); | |
173 | vma->vm_pgoff = 0; | |
174 | vma->vm_file = obj->filp; | |
175 | ||
176 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
177 | } | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
183 | { | |
184 | int ret; | |
185 | ||
186 | ret = drm_gem_mmap(filp, vma); | |
187 | if (ret) { | |
188 | DBG("mmap failed: %d", ret); | |
189 | return ret; | |
190 | } | |
191 | ||
192 | return msm_gem_mmap_obj(vma->vm_private_data, vma); | |
193 | } | |
194 | ||
195 | int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
196 | { | |
197 | struct drm_gem_object *obj = vma->vm_private_data; | |
c8afe684 RC |
198 | struct drm_device *dev = obj->dev; |
199 | struct page **pages; | |
200 | unsigned long pfn; | |
201 | pgoff_t pgoff; | |
202 | int ret; | |
203 | ||
204 | /* Make sure we don't parallel update on a fault, nor move or remove | |
205 | * something from beneath our feet | |
206 | */ | |
207 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
208 | if (ret) | |
209 | goto out; | |
210 | ||
211 | /* make sure we have pages attached now */ | |
212 | pages = get_pages(obj); | |
213 | if (IS_ERR(pages)) { | |
214 | ret = PTR_ERR(pages); | |
215 | goto out_unlock; | |
216 | } | |
217 | ||
218 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
219 | pgoff = ((unsigned long)vmf->virtual_address - | |
220 | vma->vm_start) >> PAGE_SHIFT; | |
221 | ||
871d812a | 222 | pfn = page_to_pfn(pages[pgoff]); |
c8afe684 RC |
223 | |
224 | VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, | |
225 | pfn, pfn << PAGE_SHIFT); | |
226 | ||
01c8f1c4 DW |
227 | ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, |
228 | __pfn_to_pfn_t(pfn, PFN_DEV)); | |
c8afe684 RC |
229 | |
230 | out_unlock: | |
231 | mutex_unlock(&dev->struct_mutex); | |
232 | out: | |
233 | switch (ret) { | |
234 | case -EAGAIN: | |
c8afe684 RC |
235 | case 0: |
236 | case -ERESTARTSYS: | |
237 | case -EINTR: | |
505886d5 RC |
238 | case -EBUSY: |
239 | /* | |
240 | * EBUSY is ok: this just means that another thread | |
241 | * already did the job. | |
242 | */ | |
c8afe684 RC |
243 | return VM_FAULT_NOPAGE; |
244 | case -ENOMEM: | |
245 | return VM_FAULT_OOM; | |
246 | default: | |
247 | return VM_FAULT_SIGBUS; | |
248 | } | |
249 | } | |
250 | ||
251 | /** get mmap offset */ | |
252 | static uint64_t mmap_offset(struct drm_gem_object *obj) | |
253 | { | |
254 | struct drm_device *dev = obj->dev; | |
255 | int ret; | |
256 | ||
257 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
258 | ||
259 | /* Make it mmapable */ | |
260 | ret = drm_gem_create_mmap_offset(obj); | |
261 | ||
262 | if (ret) { | |
263 | dev_err(dev->dev, "could not allocate mmap offset\n"); | |
264 | return 0; | |
265 | } | |
266 | ||
267 | return drm_vma_node_offset_addr(&obj->vma_node); | |
268 | } | |
269 | ||
270 | uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) | |
271 | { | |
272 | uint64_t offset; | |
273 | mutex_lock(&obj->dev->struct_mutex); | |
274 | offset = mmap_offset(obj); | |
275 | mutex_unlock(&obj->dev->struct_mutex); | |
276 | return offset; | |
277 | } | |
278 | ||
c8afe684 RC |
279 | /* should be called under struct_mutex.. although it can be called |
280 | * from atomic context without struct_mutex to acquire an extra | |
281 | * iova ref if you know one is already held. | |
282 | * | |
283 | * That means when I do eventually need to add support for unpinning | |
284 | * the refcnt counter needs to be atomic_t. | |
285 | */ | |
286 | int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, | |
287 | uint32_t *iova) | |
288 | { | |
289 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
290 | int ret = 0; | |
291 | ||
292 | if (!msm_obj->domain[id].iova) { | |
293 | struct msm_drm_private *priv = obj->dev->dev_private; | |
871d812a RC |
294 | struct page **pages = get_pages(obj); |
295 | ||
c8afe684 RC |
296 | if (IS_ERR(pages)) |
297 | return PTR_ERR(pages); | |
871d812a RC |
298 | |
299 | if (iommu_present(&platform_bus_type)) { | |
1c4997fe RC |
300 | struct msm_mmu *mmu = priv->mmus[id]; |
301 | uint32_t offset; | |
302 | ||
303 | if (WARN_ON(!mmu)) | |
304 | return -EINVAL; | |
305 | ||
306 | offset = (uint32_t)mmap_offset(obj); | |
871d812a RC |
307 | ret = mmu->funcs->map(mmu, offset, msm_obj->sgt, |
308 | obj->size, IOMMU_READ | IOMMU_WRITE); | |
309 | msm_obj->domain[id].iova = offset; | |
310 | } else { | |
311 | msm_obj->domain[id].iova = physaddr(obj); | |
312 | } | |
c8afe684 RC |
313 | } |
314 | ||
315 | if (!ret) | |
316 | *iova = msm_obj->domain[id].iova; | |
317 | ||
318 | return ret; | |
319 | } | |
320 | ||
2638d90a | 321 | /* get iova, taking a reference. Should have a matching put */ |
c8afe684 RC |
322 | int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) |
323 | { | |
edd4fc63 | 324 | struct msm_gem_object *msm_obj = to_msm_bo(obj); |
c8afe684 | 325 | int ret; |
edd4fc63 RC |
326 | |
327 | /* this is safe right now because we don't unmap until the | |
328 | * bo is deleted: | |
329 | */ | |
330 | if (msm_obj->domain[id].iova) { | |
331 | *iova = msm_obj->domain[id].iova; | |
332 | return 0; | |
333 | } | |
334 | ||
c8afe684 RC |
335 | mutex_lock(&obj->dev->struct_mutex); |
336 | ret = msm_gem_get_iova_locked(obj, id, iova); | |
337 | mutex_unlock(&obj->dev->struct_mutex); | |
338 | return ret; | |
339 | } | |
340 | ||
2638d90a RC |
341 | /* get iova without taking a reference, used in places where you have |
342 | * already done a 'msm_gem_get_iova()'. | |
343 | */ | |
344 | uint32_t msm_gem_iova(struct drm_gem_object *obj, int id) | |
345 | { | |
346 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
347 | WARN_ON(!msm_obj->domain[id].iova); | |
348 | return msm_obj->domain[id].iova; | |
349 | } | |
350 | ||
c8afe684 RC |
351 | void msm_gem_put_iova(struct drm_gem_object *obj, int id) |
352 | { | |
353 | // XXX TODO .. | |
354 | // NOTE: probably don't need a _locked() version.. we wouldn't | |
355 | // normally unmap here, but instead just mark that it could be | |
356 | // unmapped (if the iova refcnt drops to zero), but then later | |
357 | // if another _get_iova_locked() fails we can start unmapping | |
358 | // things that are no longer needed.. | |
359 | } | |
360 | ||
361 | int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, | |
362 | struct drm_mode_create_dumb *args) | |
363 | { | |
364 | args->pitch = align_pitch(args->width, args->bpp); | |
365 | args->size = PAGE_ALIGN(args->pitch * args->height); | |
366 | return msm_gem_new_handle(dev, file, args->size, | |
367 | MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); | |
368 | } | |
369 | ||
c8afe684 RC |
370 | int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, |
371 | uint32_t handle, uint64_t *offset) | |
372 | { | |
373 | struct drm_gem_object *obj; | |
374 | int ret = 0; | |
375 | ||
376 | /* GEM does all our handle to object mapping */ | |
377 | obj = drm_gem_object_lookup(dev, file, handle); | |
378 | if (obj == NULL) { | |
379 | ret = -ENOENT; | |
380 | goto fail; | |
381 | } | |
382 | ||
383 | *offset = msm_gem_mmap_offset(obj); | |
384 | ||
385 | drm_gem_object_unreference_unlocked(obj); | |
386 | ||
387 | fail: | |
388 | return ret; | |
389 | } | |
390 | ||
391 | void *msm_gem_vaddr_locked(struct drm_gem_object *obj) | |
392 | { | |
393 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
394 | WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); | |
395 | if (!msm_obj->vaddr) { | |
396 | struct page **pages = get_pages(obj); | |
397 | if (IS_ERR(pages)) | |
398 | return ERR_CAST(pages); | |
399 | msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, | |
400 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
401 | } | |
402 | return msm_obj->vaddr; | |
403 | } | |
404 | ||
405 | void *msm_gem_vaddr(struct drm_gem_object *obj) | |
406 | { | |
407 | void *ret; | |
408 | mutex_lock(&obj->dev->struct_mutex); | |
409 | ret = msm_gem_vaddr_locked(obj); | |
410 | mutex_unlock(&obj->dev->struct_mutex); | |
411 | return ret; | |
412 | } | |
413 | ||
7198e6b0 | 414 | void msm_gem_move_to_active(struct drm_gem_object *obj, |
bf6811f3 | 415 | struct msm_gpu *gpu, bool write, uint32_t fence) |
7198e6b0 RC |
416 | { |
417 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
418 | msm_obj->gpu = gpu; | |
bf6811f3 RC |
419 | if (write) |
420 | msm_obj->write_fence = fence; | |
421 | else | |
422 | msm_obj->read_fence = fence; | |
7198e6b0 RC |
423 | list_del_init(&msm_obj->mm_list); |
424 | list_add_tail(&msm_obj->mm_list, &gpu->active_list); | |
425 | } | |
426 | ||
427 | void msm_gem_move_to_inactive(struct drm_gem_object *obj) | |
428 | { | |
429 | struct drm_device *dev = obj->dev; | |
430 | struct msm_drm_private *priv = dev->dev_private; | |
431 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
432 | ||
433 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
434 | ||
435 | msm_obj->gpu = NULL; | |
bf6811f3 RC |
436 | msm_obj->read_fence = 0; |
437 | msm_obj->write_fence = 0; | |
7198e6b0 RC |
438 | list_del_init(&msm_obj->mm_list); |
439 | list_add_tail(&msm_obj->mm_list, &priv->inactive_list); | |
7198e6b0 RC |
440 | } |
441 | ||
ba00c3f2 | 442 | int msm_gem_cpu_sync(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) |
7198e6b0 RC |
443 | { |
444 | struct drm_device *dev = obj->dev; | |
ca762a8a | 445 | struct msm_drm_private *priv = dev->dev_private; |
7198e6b0 RC |
446 | struct msm_gem_object *msm_obj = to_msm_bo(obj); |
447 | int ret = 0; | |
448 | ||
f816f272 | 449 | if (is_active(msm_obj)) { |
69193e50 | 450 | uint32_t fence = msm_gem_fence(msm_obj, op); |
f816f272 | 451 | |
f816f272 RC |
452 | if (op & MSM_PREP_NOSYNC) |
453 | timeout = NULL; | |
454 | ||
ca762a8a RC |
455 | if (priv->gpu) |
456 | ret = msm_wait_fence(priv->gpu->fctx, fence, timeout, true); | |
bf6811f3 | 457 | } |
7198e6b0 | 458 | |
ba00c3f2 RC |
459 | return ret; |
460 | } | |
461 | ||
462 | int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) | |
463 | { | |
464 | int ret = msm_gem_cpu_sync(obj, op, timeout); | |
465 | ||
7198e6b0 | 466 | /* TODO cache maintenance */ |
c8afe684 | 467 | |
7198e6b0 RC |
468 | return ret; |
469 | } | |
c8afe684 | 470 | |
7198e6b0 RC |
471 | int msm_gem_cpu_fini(struct drm_gem_object *obj) |
472 | { | |
473 | /* TODO cache maintenance */ | |
c8afe684 RC |
474 | return 0; |
475 | } | |
476 | ||
477 | #ifdef CONFIG_DEBUG_FS | |
478 | void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) | |
479 | { | |
480 | struct drm_device *dev = obj->dev; | |
481 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
482 | uint64_t off = drm_vma_node_start(&obj->vma_node); | |
483 | ||
484 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
fc99f97a | 485 | seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %zu\n", |
7198e6b0 | 486 | msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', |
bf6811f3 RC |
487 | msm_obj->read_fence, msm_obj->write_fence, |
488 | obj->name, obj->refcount.refcount.counter, | |
c8afe684 RC |
489 | off, msm_obj->vaddr, obj->size); |
490 | } | |
491 | ||
492 | void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) | |
493 | { | |
494 | struct msm_gem_object *msm_obj; | |
495 | int count = 0; | |
496 | size_t size = 0; | |
497 | ||
498 | list_for_each_entry(msm_obj, list, mm_list) { | |
499 | struct drm_gem_object *obj = &msm_obj->base; | |
500 | seq_printf(m, " "); | |
501 | msm_gem_describe(obj, m); | |
502 | count++; | |
503 | size += obj->size; | |
504 | } | |
505 | ||
506 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
507 | } | |
508 | #endif | |
509 | ||
510 | void msm_gem_free_object(struct drm_gem_object *obj) | |
511 | { | |
512 | struct drm_device *dev = obj->dev; | |
871d812a | 513 | struct msm_drm_private *priv = obj->dev->dev_private; |
c8afe684 RC |
514 | struct msm_gem_object *msm_obj = to_msm_bo(obj); |
515 | int id; | |
516 | ||
517 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
518 | ||
7198e6b0 RC |
519 | /* object should not be on active list: */ |
520 | WARN_ON(is_active(msm_obj)); | |
521 | ||
c8afe684 RC |
522 | list_del(&msm_obj->mm_list); |
523 | ||
524 | for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { | |
871d812a RC |
525 | struct msm_mmu *mmu = priv->mmus[id]; |
526 | if (mmu && msm_obj->domain[id].iova) { | |
257d06f7 | 527 | uint32_t offset = msm_obj->domain[id].iova; |
871d812a | 528 | mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size); |
c8afe684 RC |
529 | } |
530 | } | |
531 | ||
05b84911 RC |
532 | if (obj->import_attach) { |
533 | if (msm_obj->vaddr) | |
534 | dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); | |
535 | ||
536 | /* Don't drop the pages for imported dmabuf, as they are not | |
537 | * ours, just free the array we allocated: | |
538 | */ | |
539 | if (msm_obj->pages) | |
540 | drm_free_large(msm_obj->pages); | |
c8afe684 | 541 | |
f28730c8 | 542 | drm_prime_gem_destroy(obj, msm_obj->sgt); |
05b84911 | 543 | } else { |
264f7d67 | 544 | vunmap(msm_obj->vaddr); |
05b84911 RC |
545 | put_pages(obj); |
546 | } | |
c8afe684 | 547 | |
7198e6b0 RC |
548 | if (msm_obj->resv == &msm_obj->_resv) |
549 | reservation_object_fini(msm_obj->resv); | |
550 | ||
c8afe684 RC |
551 | drm_gem_object_release(obj); |
552 | ||
553 | kfree(msm_obj); | |
554 | } | |
555 | ||
556 | /* convenience method to construct a GEM buffer object, and userspace handle */ | |
557 | int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
558 | uint32_t size, uint32_t flags, uint32_t *handle) | |
559 | { | |
560 | struct drm_gem_object *obj; | |
561 | int ret; | |
562 | ||
563 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
564 | if (ret) | |
565 | return ret; | |
566 | ||
567 | obj = msm_gem_new(dev, size, flags); | |
568 | ||
569 | mutex_unlock(&dev->struct_mutex); | |
570 | ||
571 | if (IS_ERR(obj)) | |
572 | return PTR_ERR(obj); | |
573 | ||
574 | ret = drm_gem_handle_create(file, obj, handle); | |
575 | ||
576 | /* drop reference from allocate - handle holds it now */ | |
577 | drm_gem_object_unreference_unlocked(obj); | |
578 | ||
579 | return ret; | |
580 | } | |
581 | ||
05b84911 RC |
582 | static int msm_gem_new_impl(struct drm_device *dev, |
583 | uint32_t size, uint32_t flags, | |
79f0e202 | 584 | struct reservation_object *resv, |
05b84911 | 585 | struct drm_gem_object **obj) |
c8afe684 RC |
586 | { |
587 | struct msm_drm_private *priv = dev->dev_private; | |
588 | struct msm_gem_object *msm_obj; | |
871d812a | 589 | unsigned sz; |
072f1f91 | 590 | bool use_vram = false; |
c8afe684 RC |
591 | |
592 | switch (flags & MSM_BO_CACHE_MASK) { | |
593 | case MSM_BO_UNCACHED: | |
594 | case MSM_BO_CACHED: | |
595 | case MSM_BO_WC: | |
596 | break; | |
597 | default: | |
598 | dev_err(dev->dev, "invalid cache flag: %x\n", | |
599 | (flags & MSM_BO_CACHE_MASK)); | |
05b84911 | 600 | return -EINVAL; |
c8afe684 RC |
601 | } |
602 | ||
871d812a | 603 | if (!iommu_present(&platform_bus_type)) |
072f1f91 RC |
604 | use_vram = true; |
605 | else if ((flags & MSM_BO_STOLEN) && priv->vram.size) | |
606 | use_vram = true; | |
607 | ||
608 | if (WARN_ON(use_vram && !priv->vram.size)) | |
609 | return -EINVAL; | |
610 | ||
611 | sz = sizeof(*msm_obj); | |
612 | if (use_vram) | |
871d812a RC |
613 | sz += sizeof(struct drm_mm_node); |
614 | ||
615 | msm_obj = kzalloc(sz, GFP_KERNEL); | |
05b84911 RC |
616 | if (!msm_obj) |
617 | return -ENOMEM; | |
c8afe684 | 618 | |
072f1f91 | 619 | if (use_vram) |
871d812a RC |
620 | msm_obj->vram_node = (void *)&msm_obj[1]; |
621 | ||
c8afe684 RC |
622 | msm_obj->flags = flags; |
623 | ||
79f0e202 RC |
624 | if (resv) { |
625 | msm_obj->resv = resv; | |
626 | } else { | |
627 | msm_obj->resv = &msm_obj->_resv; | |
628 | reservation_object_init(msm_obj->resv); | |
629 | } | |
c8afe684 | 630 | |
7198e6b0 | 631 | INIT_LIST_HEAD(&msm_obj->submit_entry); |
c8afe684 RC |
632 | list_add_tail(&msm_obj->mm_list, &priv->inactive_list); |
633 | ||
05b84911 RC |
634 | *obj = &msm_obj->base; |
635 | ||
636 | return 0; | |
637 | } | |
638 | ||
639 | struct drm_gem_object *msm_gem_new(struct drm_device *dev, | |
640 | uint32_t size, uint32_t flags) | |
641 | { | |
871d812a | 642 | struct drm_gem_object *obj = NULL; |
05b84911 RC |
643 | int ret; |
644 | ||
645 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
646 | ||
647 | size = PAGE_ALIGN(size); | |
648 | ||
79f0e202 | 649 | ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); |
05b84911 RC |
650 | if (ret) |
651 | goto fail; | |
652 | ||
072f1f91 | 653 | if (use_pages(obj)) { |
871d812a RC |
654 | ret = drm_gem_object_init(dev, obj, size); |
655 | if (ret) | |
656 | goto fail; | |
657 | } else { | |
658 | drm_gem_private_object_init(dev, obj, size); | |
659 | } | |
05b84911 RC |
660 | |
661 | return obj; | |
662 | ||
663 | fail: | |
664 | if (obj) | |
9999f105 | 665 | drm_gem_object_unreference(obj); |
05b84911 RC |
666 | |
667 | return ERR_PTR(ret); | |
668 | } | |
669 | ||
670 | struct drm_gem_object *msm_gem_import(struct drm_device *dev, | |
79f0e202 | 671 | struct dma_buf *dmabuf, struct sg_table *sgt) |
05b84911 RC |
672 | { |
673 | struct msm_gem_object *msm_obj; | |
674 | struct drm_gem_object *obj; | |
79f0e202 | 675 | uint32_t size; |
05b84911 RC |
676 | int ret, npages; |
677 | ||
871d812a RC |
678 | /* if we don't have IOMMU, don't bother pretending we can import: */ |
679 | if (!iommu_present(&platform_bus_type)) { | |
680 | dev_err(dev->dev, "cannot import without IOMMU\n"); | |
681 | return ERR_PTR(-EINVAL); | |
682 | } | |
683 | ||
79f0e202 | 684 | size = PAGE_ALIGN(dmabuf->size); |
05b84911 | 685 | |
79f0e202 | 686 | ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj); |
05b84911 RC |
687 | if (ret) |
688 | goto fail; | |
689 | ||
690 | drm_gem_private_object_init(dev, obj, size); | |
691 | ||
692 | npages = size / PAGE_SIZE; | |
693 | ||
694 | msm_obj = to_msm_bo(obj); | |
695 | msm_obj->sgt = sgt; | |
696 | msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); | |
697 | if (!msm_obj->pages) { | |
698 | ret = -ENOMEM; | |
699 | goto fail; | |
700 | } | |
701 | ||
702 | ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); | |
703 | if (ret) | |
704 | goto fail; | |
705 | ||
c8afe684 RC |
706 | return obj; |
707 | ||
708 | fail: | |
709 | if (obj) | |
710 | drm_gem_object_unreference_unlocked(obj); | |
711 | ||
712 | return ERR_PTR(ret); | |
713 | } |