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> |
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 | 198 | struct drm_device *dev = obj->dev; |
d78d383a | 199 | struct msm_drm_private *priv = dev->dev_private; |
c8afe684 RC |
200 | struct page **pages; |
201 | unsigned long pfn; | |
202 | pgoff_t pgoff; | |
203 | int ret; | |
204 | ||
d78d383a RC |
205 | /* This should only happen if userspace tries to pass a mmap'd |
206 | * but unfaulted gem bo vaddr into submit ioctl, triggering | |
207 | * a page fault while struct_mutex is already held. This is | |
208 | * not a valid use-case so just bail. | |
209 | */ | |
210 | if (priv->struct_mutex_task == current) | |
211 | return VM_FAULT_SIGBUS; | |
212 | ||
c8afe684 RC |
213 | /* Make sure we don't parallel update on a fault, nor move or remove |
214 | * something from beneath our feet | |
215 | */ | |
216 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
217 | if (ret) | |
218 | goto out; | |
219 | ||
220 | /* make sure we have pages attached now */ | |
221 | pages = get_pages(obj); | |
222 | if (IS_ERR(pages)) { | |
223 | ret = PTR_ERR(pages); | |
224 | goto out_unlock; | |
225 | } | |
226 | ||
227 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
228 | pgoff = ((unsigned long)vmf->virtual_address - | |
229 | vma->vm_start) >> PAGE_SHIFT; | |
230 | ||
871d812a | 231 | pfn = page_to_pfn(pages[pgoff]); |
c8afe684 RC |
232 | |
233 | VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, | |
234 | pfn, pfn << PAGE_SHIFT); | |
235 | ||
01c8f1c4 DW |
236 | ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, |
237 | __pfn_to_pfn_t(pfn, PFN_DEV)); | |
c8afe684 RC |
238 | |
239 | out_unlock: | |
240 | mutex_unlock(&dev->struct_mutex); | |
241 | out: | |
242 | switch (ret) { | |
243 | case -EAGAIN: | |
c8afe684 RC |
244 | case 0: |
245 | case -ERESTARTSYS: | |
246 | case -EINTR: | |
505886d5 RC |
247 | case -EBUSY: |
248 | /* | |
249 | * EBUSY is ok: this just means that another thread | |
250 | * already did the job. | |
251 | */ | |
c8afe684 RC |
252 | return VM_FAULT_NOPAGE; |
253 | case -ENOMEM: | |
254 | return VM_FAULT_OOM; | |
255 | default: | |
256 | return VM_FAULT_SIGBUS; | |
257 | } | |
258 | } | |
259 | ||
260 | /** get mmap offset */ | |
261 | static uint64_t mmap_offset(struct drm_gem_object *obj) | |
262 | { | |
263 | struct drm_device *dev = obj->dev; | |
264 | int ret; | |
265 | ||
266 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
267 | ||
268 | /* Make it mmapable */ | |
269 | ret = drm_gem_create_mmap_offset(obj); | |
270 | ||
271 | if (ret) { | |
272 | dev_err(dev->dev, "could not allocate mmap offset\n"); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | return drm_vma_node_offset_addr(&obj->vma_node); | |
277 | } | |
278 | ||
279 | uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj) | |
280 | { | |
281 | uint64_t offset; | |
282 | mutex_lock(&obj->dev->struct_mutex); | |
283 | offset = mmap_offset(obj); | |
284 | mutex_unlock(&obj->dev->struct_mutex); | |
285 | return offset; | |
286 | } | |
287 | ||
4fe5f65e RC |
288 | static void |
289 | put_iova(struct drm_gem_object *obj) | |
290 | { | |
291 | struct drm_device *dev = obj->dev; | |
292 | struct msm_drm_private *priv = obj->dev->dev_private; | |
293 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
294 | int id; | |
295 | ||
296 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
297 | ||
298 | for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) { | |
299 | struct msm_mmu *mmu = priv->mmus[id]; | |
300 | if (mmu && msm_obj->domain[id].iova) { | |
301 | uint32_t offset = msm_obj->domain[id].iova; | |
302 | mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size); | |
303 | msm_obj->domain[id].iova = 0; | |
304 | } | |
305 | } | |
306 | } | |
307 | ||
c8afe684 RC |
308 | /* should be called under struct_mutex.. although it can be called |
309 | * from atomic context without struct_mutex to acquire an extra | |
310 | * iova ref if you know one is already held. | |
311 | * | |
312 | * That means when I do eventually need to add support for unpinning | |
313 | * the refcnt counter needs to be atomic_t. | |
314 | */ | |
315 | int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id, | |
316 | uint32_t *iova) | |
317 | { | |
318 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
319 | int ret = 0; | |
320 | ||
321 | if (!msm_obj->domain[id].iova) { | |
322 | struct msm_drm_private *priv = obj->dev->dev_private; | |
871d812a RC |
323 | struct page **pages = get_pages(obj); |
324 | ||
c8afe684 RC |
325 | if (IS_ERR(pages)) |
326 | return PTR_ERR(pages); | |
871d812a RC |
327 | |
328 | if (iommu_present(&platform_bus_type)) { | |
1c4997fe RC |
329 | struct msm_mmu *mmu = priv->mmus[id]; |
330 | uint32_t offset; | |
331 | ||
332 | if (WARN_ON(!mmu)) | |
333 | return -EINVAL; | |
334 | ||
335 | offset = (uint32_t)mmap_offset(obj); | |
871d812a RC |
336 | ret = mmu->funcs->map(mmu, offset, msm_obj->sgt, |
337 | obj->size, IOMMU_READ | IOMMU_WRITE); | |
338 | msm_obj->domain[id].iova = offset; | |
339 | } else { | |
340 | msm_obj->domain[id].iova = physaddr(obj); | |
341 | } | |
c8afe684 RC |
342 | } |
343 | ||
344 | if (!ret) | |
345 | *iova = msm_obj->domain[id].iova; | |
346 | ||
347 | return ret; | |
348 | } | |
349 | ||
2638d90a | 350 | /* get iova, taking a reference. Should have a matching put */ |
c8afe684 RC |
351 | int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova) |
352 | { | |
edd4fc63 | 353 | struct msm_gem_object *msm_obj = to_msm_bo(obj); |
c8afe684 | 354 | int ret; |
edd4fc63 RC |
355 | |
356 | /* this is safe right now because we don't unmap until the | |
357 | * bo is deleted: | |
358 | */ | |
359 | if (msm_obj->domain[id].iova) { | |
360 | *iova = msm_obj->domain[id].iova; | |
361 | return 0; | |
362 | } | |
363 | ||
c8afe684 RC |
364 | mutex_lock(&obj->dev->struct_mutex); |
365 | ret = msm_gem_get_iova_locked(obj, id, iova); | |
366 | mutex_unlock(&obj->dev->struct_mutex); | |
367 | return ret; | |
368 | } | |
369 | ||
2638d90a RC |
370 | /* get iova without taking a reference, used in places where you have |
371 | * already done a 'msm_gem_get_iova()'. | |
372 | */ | |
373 | uint32_t msm_gem_iova(struct drm_gem_object *obj, int id) | |
374 | { | |
375 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
376 | WARN_ON(!msm_obj->domain[id].iova); | |
377 | return msm_obj->domain[id].iova; | |
378 | } | |
379 | ||
c8afe684 RC |
380 | void msm_gem_put_iova(struct drm_gem_object *obj, int id) |
381 | { | |
382 | // XXX TODO .. | |
383 | // NOTE: probably don't need a _locked() version.. we wouldn't | |
384 | // normally unmap here, but instead just mark that it could be | |
385 | // unmapped (if the iova refcnt drops to zero), but then later | |
386 | // if another _get_iova_locked() fails we can start unmapping | |
387 | // things that are no longer needed.. | |
388 | } | |
389 | ||
390 | int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, | |
391 | struct drm_mode_create_dumb *args) | |
392 | { | |
393 | args->pitch = align_pitch(args->width, args->bpp); | |
394 | args->size = PAGE_ALIGN(args->pitch * args->height); | |
395 | return msm_gem_new_handle(dev, file, args->size, | |
396 | MSM_BO_SCANOUT | MSM_BO_WC, &args->handle); | |
397 | } | |
398 | ||
c8afe684 RC |
399 | int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, |
400 | uint32_t handle, uint64_t *offset) | |
401 | { | |
402 | struct drm_gem_object *obj; | |
403 | int ret = 0; | |
404 | ||
405 | /* GEM does all our handle to object mapping */ | |
a8ad0bd8 | 406 | obj = drm_gem_object_lookup(file, handle); |
c8afe684 RC |
407 | if (obj == NULL) { |
408 | ret = -ENOENT; | |
409 | goto fail; | |
410 | } | |
411 | ||
412 | *offset = msm_gem_mmap_offset(obj); | |
413 | ||
414 | drm_gem_object_unreference_unlocked(obj); | |
415 | ||
416 | fail: | |
417 | return ret; | |
418 | } | |
419 | ||
18f23049 | 420 | void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj) |
c8afe684 RC |
421 | { |
422 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
423 | WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); | |
424 | if (!msm_obj->vaddr) { | |
425 | struct page **pages = get_pages(obj); | |
426 | if (IS_ERR(pages)) | |
427 | return ERR_CAST(pages); | |
428 | msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, | |
429 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
69a834c2 RC |
430 | if (msm_obj->vaddr == NULL) |
431 | return ERR_PTR(-ENOMEM); | |
c8afe684 | 432 | } |
e1e9db2c | 433 | msm_obj->vmap_count++; |
c8afe684 RC |
434 | return msm_obj->vaddr; |
435 | } | |
436 | ||
18f23049 | 437 | void *msm_gem_get_vaddr(struct drm_gem_object *obj) |
c8afe684 RC |
438 | { |
439 | void *ret; | |
440 | mutex_lock(&obj->dev->struct_mutex); | |
18f23049 | 441 | ret = msm_gem_get_vaddr_locked(obj); |
c8afe684 RC |
442 | mutex_unlock(&obj->dev->struct_mutex); |
443 | return ret; | |
444 | } | |
445 | ||
18f23049 RC |
446 | void msm_gem_put_vaddr_locked(struct drm_gem_object *obj) |
447 | { | |
e1e9db2c | 448 | struct msm_gem_object *msm_obj = to_msm_bo(obj); |
18f23049 | 449 | WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); |
e1e9db2c RC |
450 | WARN_ON(msm_obj->vmap_count < 1); |
451 | msm_obj->vmap_count--; | |
18f23049 RC |
452 | } |
453 | ||
454 | void msm_gem_put_vaddr(struct drm_gem_object *obj) | |
455 | { | |
e1e9db2c RC |
456 | mutex_lock(&obj->dev->struct_mutex); |
457 | msm_gem_put_vaddr_locked(obj); | |
458 | mutex_unlock(&obj->dev->struct_mutex); | |
18f23049 RC |
459 | } |
460 | ||
4cd33c48 RC |
461 | /* Update madvise status, returns true if not purged, else |
462 | * false or -errno. | |
463 | */ | |
464 | int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv) | |
465 | { | |
466 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
467 | ||
468 | WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); | |
469 | ||
470 | if (msm_obj->madv != __MSM_MADV_PURGED) | |
471 | msm_obj->madv = madv; | |
472 | ||
473 | return (msm_obj->madv != __MSM_MADV_PURGED); | |
474 | } | |
475 | ||
68209390 RC |
476 | void msm_gem_purge(struct drm_gem_object *obj) |
477 | { | |
478 | struct drm_device *dev = obj->dev; | |
479 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
480 | ||
481 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
482 | WARN_ON(!is_purgeable(msm_obj)); | |
483 | WARN_ON(obj->import_attach); | |
484 | ||
485 | put_iova(obj); | |
486 | ||
e1e9db2c | 487 | msm_gem_vunmap(obj); |
68209390 RC |
488 | |
489 | put_pages(obj); | |
490 | ||
491 | msm_obj->madv = __MSM_MADV_PURGED; | |
492 | ||
493 | drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); | |
494 | drm_gem_free_mmap_offset(obj); | |
495 | ||
496 | /* Our goal here is to return as much of the memory as | |
497 | * is possible back to the system as we are called from OOM. | |
498 | * To do this we must instruct the shmfs to drop all of its | |
499 | * backing pages, *now*. | |
500 | */ | |
501 | shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1); | |
502 | ||
503 | invalidate_mapping_pages(file_inode(obj->filp)->i_mapping, | |
504 | 0, (loff_t)-1); | |
505 | } | |
506 | ||
e1e9db2c RC |
507 | void msm_gem_vunmap(struct drm_gem_object *obj) |
508 | { | |
509 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
510 | ||
511 | if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj))) | |
512 | return; | |
513 | ||
514 | vunmap(msm_obj->vaddr); | |
515 | msm_obj->vaddr = NULL; | |
516 | } | |
517 | ||
b6295f9a RC |
518 | /* must be called before _move_to_active().. */ |
519 | int msm_gem_sync_object(struct drm_gem_object *obj, | |
520 | struct msm_fence_context *fctx, bool exclusive) | |
521 | { | |
522 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
523 | struct reservation_object_list *fobj; | |
524 | struct fence *fence; | |
525 | int i, ret; | |
526 | ||
527 | if (!exclusive) { | |
528 | /* NOTE: _reserve_shared() must happen before _add_shared_fence(), | |
529 | * which makes this a slightly strange place to call it. OTOH this | |
530 | * is a convenient can-fail point to hook it in. (And similar to | |
531 | * how etnaviv and nouveau handle this.) | |
532 | */ | |
533 | ret = reservation_object_reserve_shared(msm_obj->resv); | |
534 | if (ret) | |
535 | return ret; | |
536 | } | |
537 | ||
538 | fobj = reservation_object_get_list(msm_obj->resv); | |
539 | if (!fobj || (fobj->shared_count == 0)) { | |
540 | fence = reservation_object_get_excl(msm_obj->resv); | |
541 | /* don't need to wait on our own fences, since ring is fifo */ | |
542 | if (fence && (fence->context != fctx->context)) { | |
543 | ret = fence_wait(fence, true); | |
544 | if (ret) | |
545 | return ret; | |
546 | } | |
547 | } | |
548 | ||
549 | if (!exclusive || !fobj) | |
550 | return 0; | |
551 | ||
552 | for (i = 0; i < fobj->shared_count; i++) { | |
553 | fence = rcu_dereference_protected(fobj->shared[i], | |
554 | reservation_object_held(msm_obj->resv)); | |
555 | if (fence->context != fctx->context) { | |
556 | ret = fence_wait(fence, true); | |
557 | if (ret) | |
558 | return ret; | |
559 | } | |
560 | } | |
561 | ||
562 | return 0; | |
563 | } | |
564 | ||
7198e6b0 | 565 | void msm_gem_move_to_active(struct drm_gem_object *obj, |
b6295f9a | 566 | struct msm_gpu *gpu, bool exclusive, struct fence *fence) |
7198e6b0 RC |
567 | { |
568 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
4cd33c48 | 569 | WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED); |
7198e6b0 | 570 | msm_obj->gpu = gpu; |
b6295f9a RC |
571 | if (exclusive) |
572 | reservation_object_add_excl_fence(msm_obj->resv, fence); | |
bf6811f3 | 573 | else |
b6295f9a | 574 | reservation_object_add_shared_fence(msm_obj->resv, fence); |
7198e6b0 RC |
575 | list_del_init(&msm_obj->mm_list); |
576 | list_add_tail(&msm_obj->mm_list, &gpu->active_list); | |
577 | } | |
578 | ||
579 | void msm_gem_move_to_inactive(struct drm_gem_object *obj) | |
580 | { | |
581 | struct drm_device *dev = obj->dev; | |
582 | struct msm_drm_private *priv = dev->dev_private; | |
583 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
584 | ||
585 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
586 | ||
587 | msm_obj->gpu = NULL; | |
7198e6b0 RC |
588 | list_del_init(&msm_obj->mm_list); |
589 | list_add_tail(&msm_obj->mm_list, &priv->inactive_list); | |
7198e6b0 RC |
590 | } |
591 | ||
b6295f9a | 592 | int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout) |
7198e6b0 | 593 | { |
7198e6b0 | 594 | struct msm_gem_object *msm_obj = to_msm_bo(obj); |
b6295f9a | 595 | bool write = !!(op & MSM_PREP_WRITE); |
f816f272 | 596 | |
b6295f9a RC |
597 | if (op & MSM_PREP_NOSYNC) { |
598 | if (!reservation_object_test_signaled_rcu(msm_obj->resv, write)) | |
599 | return -EBUSY; | |
600 | } else { | |
601 | int ret; | |
f816f272 | 602 | |
b6295f9a RC |
603 | ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write, |
604 | true, timeout_to_jiffies(timeout)); | |
605 | if (ret <= 0) | |
606 | return ret == 0 ? -ETIMEDOUT : ret; | |
bf6811f3 | 607 | } |
7198e6b0 RC |
608 | |
609 | /* TODO cache maintenance */ | |
c8afe684 | 610 | |
b6295f9a | 611 | return 0; |
7198e6b0 | 612 | } |
c8afe684 | 613 | |
7198e6b0 RC |
614 | int msm_gem_cpu_fini(struct drm_gem_object *obj) |
615 | { | |
616 | /* TODO cache maintenance */ | |
c8afe684 RC |
617 | return 0; |
618 | } | |
619 | ||
620 | #ifdef CONFIG_DEBUG_FS | |
b6295f9a RC |
621 | static void describe_fence(struct fence *fence, const char *type, |
622 | struct seq_file *m) | |
623 | { | |
624 | if (!fence_is_signaled(fence)) | |
625 | seq_printf(m, "\t%9s: %s %s seq %u\n", type, | |
626 | fence->ops->get_driver_name(fence), | |
627 | fence->ops->get_timeline_name(fence), | |
628 | fence->seqno); | |
629 | } | |
630 | ||
c8afe684 RC |
631 | void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m) |
632 | { | |
c8afe684 | 633 | struct msm_gem_object *msm_obj = to_msm_bo(obj); |
b6295f9a RC |
634 | struct reservation_object *robj = msm_obj->resv; |
635 | struct reservation_object_list *fobj; | |
636 | struct fence *fence; | |
c8afe684 | 637 | uint64_t off = drm_vma_node_start(&obj->vma_node); |
4cd33c48 | 638 | const char *madv; |
c8afe684 | 639 | |
b6295f9a RC |
640 | WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); |
641 | ||
4cd33c48 RC |
642 | switch (msm_obj->madv) { |
643 | case __MSM_MADV_PURGED: | |
644 | madv = " purged"; | |
645 | break; | |
646 | case MSM_MADV_DONTNEED: | |
647 | madv = " purgeable"; | |
648 | break; | |
649 | case MSM_MADV_WILLNEED: | |
650 | default: | |
651 | madv = ""; | |
652 | break; | |
653 | } | |
654 | ||
655 | seq_printf(m, "%08x: %c %2d (%2d) %08llx %p %zu%s\n", | |
7198e6b0 | 656 | msm_obj->flags, is_active(msm_obj) ? 'A' : 'I', |
bf6811f3 | 657 | obj->name, obj->refcount.refcount.counter, |
4cd33c48 | 658 | off, msm_obj->vaddr, obj->size, madv); |
b6295f9a RC |
659 | |
660 | rcu_read_lock(); | |
661 | fobj = rcu_dereference(robj->fence); | |
662 | if (fobj) { | |
663 | unsigned int i, shared_count = fobj->shared_count; | |
664 | ||
665 | for (i = 0; i < shared_count; i++) { | |
666 | fence = rcu_dereference(fobj->shared[i]); | |
667 | describe_fence(fence, "Shared", m); | |
668 | } | |
669 | } | |
670 | ||
671 | fence = rcu_dereference(robj->fence_excl); | |
672 | if (fence) | |
673 | describe_fence(fence, "Exclusive", m); | |
674 | rcu_read_unlock(); | |
c8afe684 RC |
675 | } |
676 | ||
677 | void msm_gem_describe_objects(struct list_head *list, struct seq_file *m) | |
678 | { | |
679 | struct msm_gem_object *msm_obj; | |
680 | int count = 0; | |
681 | size_t size = 0; | |
682 | ||
683 | list_for_each_entry(msm_obj, list, mm_list) { | |
684 | struct drm_gem_object *obj = &msm_obj->base; | |
685 | seq_printf(m, " "); | |
686 | msm_gem_describe(obj, m); | |
687 | count++; | |
688 | size += obj->size; | |
689 | } | |
690 | ||
691 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
692 | } | |
693 | #endif | |
694 | ||
695 | void msm_gem_free_object(struct drm_gem_object *obj) | |
696 | { | |
697 | struct drm_device *dev = obj->dev; | |
698 | struct msm_gem_object *msm_obj = to_msm_bo(obj); | |
c8afe684 RC |
699 | |
700 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
701 | ||
7198e6b0 RC |
702 | /* object should not be on active list: */ |
703 | WARN_ON(is_active(msm_obj)); | |
704 | ||
c8afe684 RC |
705 | list_del(&msm_obj->mm_list); |
706 | ||
4fe5f65e | 707 | put_iova(obj); |
c8afe684 | 708 | |
05b84911 RC |
709 | if (obj->import_attach) { |
710 | if (msm_obj->vaddr) | |
711 | dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr); | |
712 | ||
713 | /* Don't drop the pages for imported dmabuf, as they are not | |
714 | * ours, just free the array we allocated: | |
715 | */ | |
716 | if (msm_obj->pages) | |
717 | drm_free_large(msm_obj->pages); | |
c8afe684 | 718 | |
f28730c8 | 719 | drm_prime_gem_destroy(obj, msm_obj->sgt); |
05b84911 | 720 | } else { |
e1e9db2c | 721 | msm_gem_vunmap(obj); |
05b84911 RC |
722 | put_pages(obj); |
723 | } | |
c8afe684 | 724 | |
7198e6b0 RC |
725 | if (msm_obj->resv == &msm_obj->_resv) |
726 | reservation_object_fini(msm_obj->resv); | |
727 | ||
c8afe684 RC |
728 | drm_gem_object_release(obj); |
729 | ||
730 | kfree(msm_obj); | |
731 | } | |
732 | ||
733 | /* convenience method to construct a GEM buffer object, and userspace handle */ | |
734 | int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
735 | uint32_t size, uint32_t flags, uint32_t *handle) | |
736 | { | |
737 | struct drm_gem_object *obj; | |
738 | int ret; | |
739 | ||
740 | ret = mutex_lock_interruptible(&dev->struct_mutex); | |
741 | if (ret) | |
742 | return ret; | |
743 | ||
744 | obj = msm_gem_new(dev, size, flags); | |
745 | ||
746 | mutex_unlock(&dev->struct_mutex); | |
747 | ||
748 | if (IS_ERR(obj)) | |
749 | return PTR_ERR(obj); | |
750 | ||
751 | ret = drm_gem_handle_create(file, obj, handle); | |
752 | ||
753 | /* drop reference from allocate - handle holds it now */ | |
754 | drm_gem_object_unreference_unlocked(obj); | |
755 | ||
756 | return ret; | |
757 | } | |
758 | ||
05b84911 RC |
759 | static int msm_gem_new_impl(struct drm_device *dev, |
760 | uint32_t size, uint32_t flags, | |
79f0e202 | 761 | struct reservation_object *resv, |
05b84911 | 762 | struct drm_gem_object **obj) |
c8afe684 RC |
763 | { |
764 | struct msm_drm_private *priv = dev->dev_private; | |
765 | struct msm_gem_object *msm_obj; | |
871d812a | 766 | unsigned sz; |
072f1f91 | 767 | bool use_vram = false; |
c8afe684 RC |
768 | |
769 | switch (flags & MSM_BO_CACHE_MASK) { | |
770 | case MSM_BO_UNCACHED: | |
771 | case MSM_BO_CACHED: | |
772 | case MSM_BO_WC: | |
773 | break; | |
774 | default: | |
775 | dev_err(dev->dev, "invalid cache flag: %x\n", | |
776 | (flags & MSM_BO_CACHE_MASK)); | |
05b84911 | 777 | return -EINVAL; |
c8afe684 RC |
778 | } |
779 | ||
871d812a | 780 | if (!iommu_present(&platform_bus_type)) |
072f1f91 RC |
781 | use_vram = true; |
782 | else if ((flags & MSM_BO_STOLEN) && priv->vram.size) | |
783 | use_vram = true; | |
784 | ||
785 | if (WARN_ON(use_vram && !priv->vram.size)) | |
786 | return -EINVAL; | |
787 | ||
788 | sz = sizeof(*msm_obj); | |
789 | if (use_vram) | |
871d812a RC |
790 | sz += sizeof(struct drm_mm_node); |
791 | ||
792 | msm_obj = kzalloc(sz, GFP_KERNEL); | |
05b84911 RC |
793 | if (!msm_obj) |
794 | return -ENOMEM; | |
c8afe684 | 795 | |
072f1f91 | 796 | if (use_vram) |
871d812a RC |
797 | msm_obj->vram_node = (void *)&msm_obj[1]; |
798 | ||
c8afe684 | 799 | msm_obj->flags = flags; |
4cd33c48 | 800 | msm_obj->madv = MSM_MADV_WILLNEED; |
c8afe684 | 801 | |
79f0e202 RC |
802 | if (resv) { |
803 | msm_obj->resv = resv; | |
804 | } else { | |
805 | msm_obj->resv = &msm_obj->_resv; | |
806 | reservation_object_init(msm_obj->resv); | |
807 | } | |
c8afe684 | 808 | |
7198e6b0 | 809 | INIT_LIST_HEAD(&msm_obj->submit_entry); |
c8afe684 RC |
810 | list_add_tail(&msm_obj->mm_list, &priv->inactive_list); |
811 | ||
05b84911 RC |
812 | *obj = &msm_obj->base; |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
817 | struct drm_gem_object *msm_gem_new(struct drm_device *dev, | |
818 | uint32_t size, uint32_t flags) | |
819 | { | |
871d812a | 820 | struct drm_gem_object *obj = NULL; |
05b84911 RC |
821 | int ret; |
822 | ||
823 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
824 | ||
825 | size = PAGE_ALIGN(size); | |
826 | ||
79f0e202 | 827 | ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); |
05b84911 RC |
828 | if (ret) |
829 | goto fail; | |
830 | ||
072f1f91 | 831 | if (use_pages(obj)) { |
871d812a RC |
832 | ret = drm_gem_object_init(dev, obj, size); |
833 | if (ret) | |
834 | goto fail; | |
835 | } else { | |
836 | drm_gem_private_object_init(dev, obj, size); | |
837 | } | |
05b84911 RC |
838 | |
839 | return obj; | |
840 | ||
841 | fail: | |
0a677125 | 842 | drm_gem_object_unreference(obj); |
05b84911 RC |
843 | return ERR_PTR(ret); |
844 | } | |
845 | ||
846 | struct drm_gem_object *msm_gem_import(struct drm_device *dev, | |
79f0e202 | 847 | struct dma_buf *dmabuf, struct sg_table *sgt) |
05b84911 RC |
848 | { |
849 | struct msm_gem_object *msm_obj; | |
850 | struct drm_gem_object *obj; | |
79f0e202 | 851 | uint32_t size; |
05b84911 RC |
852 | int ret, npages; |
853 | ||
871d812a RC |
854 | /* if we don't have IOMMU, don't bother pretending we can import: */ |
855 | if (!iommu_present(&platform_bus_type)) { | |
856 | dev_err(dev->dev, "cannot import without IOMMU\n"); | |
857 | return ERR_PTR(-EINVAL); | |
858 | } | |
859 | ||
79f0e202 | 860 | size = PAGE_ALIGN(dmabuf->size); |
05b84911 | 861 | |
79f0e202 | 862 | ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj); |
05b84911 RC |
863 | if (ret) |
864 | goto fail; | |
865 | ||
866 | drm_gem_private_object_init(dev, obj, size); | |
867 | ||
868 | npages = size / PAGE_SIZE; | |
869 | ||
870 | msm_obj = to_msm_bo(obj); | |
871 | msm_obj->sgt = sgt; | |
872 | msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *)); | |
873 | if (!msm_obj->pages) { | |
874 | ret = -ENOMEM; | |
875 | goto fail; | |
876 | } | |
877 | ||
878 | ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages); | |
879 | if (ret) | |
880 | goto fail; | |
881 | ||
c8afe684 RC |
882 | return obj; |
883 | ||
884 | fail: | |
e73a8569 | 885 | drm_gem_object_unreference_unlocked(obj); |
c8afe684 RC |
886 | return ERR_PTR(ret); |
887 | } |