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Commit | Line | Data |
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96f60e37 RK |
1 | /* |
2 | * Copyright (C) 2012 Russell King | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | #include <linux/dma-buf.h> | |
9 | #include <linux/dma-mapping.h> | |
10 | #include <linux/shmem_fs.h> | |
96f60e37 RK |
11 | #include "armada_drm.h" |
12 | #include "armada_gem.h" | |
13 | #include <drm/armada_drm.h> | |
14 | #include "armada_ioctlP.h" | |
15 | ||
11bac800 | 16 | static int armada_gem_vm_fault(struct vm_fault *vmf) |
96f60e37 | 17 | { |
11bac800 DJ |
18 | struct drm_gem_object *gobj = vmf->vma->vm_private_data; |
19 | struct armada_gem_object *obj = drm_to_armada_gem(gobj); | |
96f60e37 RK |
20 | unsigned long pfn = obj->phys_addr >> PAGE_SHIFT; |
21 | int ret; | |
22 | ||
11bac800 DJ |
23 | pfn += (vmf->address - vmf->vma->vm_start) >> PAGE_SHIFT; |
24 | ret = vm_insert_pfn(vmf->vma, vmf->address, pfn); | |
96f60e37 RK |
25 | |
26 | switch (ret) { | |
27 | case 0: | |
28 | case -EBUSY: | |
29 | return VM_FAULT_NOPAGE; | |
30 | case -ENOMEM: | |
31 | return VM_FAULT_OOM; | |
32 | default: | |
33 | return VM_FAULT_SIGBUS; | |
34 | } | |
35 | } | |
36 | ||
37 | const struct vm_operations_struct armada_gem_vm_ops = { | |
38 | .fault = armada_gem_vm_fault, | |
39 | .open = drm_gem_vm_open, | |
40 | .close = drm_gem_vm_close, | |
41 | }; | |
42 | ||
43 | static size_t roundup_gem_size(size_t size) | |
44 | { | |
45 | return roundup(size, PAGE_SIZE); | |
46 | } | |
47 | ||
96f60e37 RK |
48 | void armada_gem_free_object(struct drm_gem_object *obj) |
49 | { | |
50 | struct armada_gem_object *dobj = drm_to_armada_gem(obj); | |
0b8ebeac | 51 | struct armada_private *priv = obj->dev->dev_private; |
96f60e37 RK |
52 | |
53 | DRM_DEBUG_DRIVER("release obj %p\n", dobj); | |
54 | ||
55 | drm_gem_free_mmap_offset(&dobj->obj); | |
56 | ||
0b8ebeac DV |
57 | might_lock(&priv->linear_lock); |
58 | ||
96f60e37 RK |
59 | if (dobj->page) { |
60 | /* page backed memory */ | |
61 | unsigned int order = get_order(dobj->obj.size); | |
62 | __free_pages(dobj->page, order); | |
63 | } else if (dobj->linear) { | |
64 | /* linear backed memory */ | |
0b8ebeac | 65 | mutex_lock(&priv->linear_lock); |
96f60e37 | 66 | drm_mm_remove_node(dobj->linear); |
0b8ebeac | 67 | mutex_unlock(&priv->linear_lock); |
96f60e37 RK |
68 | kfree(dobj->linear); |
69 | if (dobj->addr) | |
70 | iounmap(dobj->addr); | |
71 | } | |
72 | ||
73 | if (dobj->obj.import_attach) { | |
74 | /* We only ever display imported data */ | |
0481c8c4 RK |
75 | if (dobj->sgt) |
76 | dma_buf_unmap_attachment(dobj->obj.import_attach, | |
77 | dobj->sgt, DMA_TO_DEVICE); | |
96f60e37 RK |
78 | drm_prime_gem_destroy(&dobj->obj, NULL); |
79 | } | |
80 | ||
81 | drm_gem_object_release(&dobj->obj); | |
82 | ||
83 | kfree(dobj); | |
84 | } | |
85 | ||
86 | int | |
87 | armada_gem_linear_back(struct drm_device *dev, struct armada_gem_object *obj) | |
88 | { | |
89 | struct armada_private *priv = dev->dev_private; | |
90 | size_t size = obj->obj.size; | |
91 | ||
92 | if (obj->page || obj->linear) | |
93 | return 0; | |
94 | ||
95 | /* | |
96 | * If it is a small allocation (typically cursor, which will | |
97 | * be 32x64 or 64x32 ARGB pixels) try to get it from the system. | |
98 | * Framebuffers will never be this small (our minimum size for | |
99 | * framebuffers is larger than this anyway.) Such objects are | |
100 | * only accessed by the CPU so we don't need any special handing | |
101 | * here. | |
102 | */ | |
103 | if (size <= 8192) { | |
104 | unsigned int order = get_order(size); | |
105 | struct page *p = alloc_pages(GFP_KERNEL, order); | |
106 | ||
107 | if (p) { | |
108 | obj->addr = page_address(p); | |
109 | obj->phys_addr = page_to_phys(p); | |
110 | obj->page = p; | |
111 | ||
112 | memset(obj->addr, 0, PAGE_ALIGN(size)); | |
113 | } | |
114 | } | |
115 | ||
116 | /* | |
117 | * We could grab something from CMA if it's enabled, but that | |
118 | * involves building in a problem: | |
119 | * | |
120 | * CMA's interface uses dma_alloc_coherent(), which provides us | |
121 | * with an CPU virtual address and a device address. | |
122 | * | |
123 | * The CPU virtual address may be either an address in the kernel | |
124 | * direct mapped region (for example, as it would be on x86) or | |
125 | * it may be remapped into another part of kernel memory space | |
126 | * (eg, as it would be on ARM.) This means virt_to_phys() on the | |
127 | * returned virtual address is invalid depending on the architecture | |
128 | * implementation. | |
129 | * | |
130 | * The device address may also not be a physical address; it may | |
131 | * be that there is some kind of remapping between the device and | |
132 | * system RAM, which makes the use of the device address also | |
133 | * unsafe to re-use as a physical address. | |
134 | * | |
135 | * This makes DRM usage of dma_alloc_coherent() in a generic way | |
136 | * at best very questionable and unsafe. | |
137 | */ | |
138 | ||
139 | /* Otherwise, grab it from our linear allocation */ | |
140 | if (!obj->page) { | |
141 | struct drm_mm_node *node; | |
142 | unsigned align = min_t(unsigned, size, SZ_2M); | |
143 | void __iomem *ptr; | |
144 | int ret; | |
145 | ||
146 | node = kzalloc(sizeof(*node), GFP_KERNEL); | |
147 | if (!node) | |
148 | return -ENOSPC; | |
149 | ||
0b8ebeac | 150 | mutex_lock(&priv->linear_lock); |
4e64e553 CW |
151 | ret = drm_mm_insert_node_generic(&priv->linear, node, |
152 | size, align, 0, 0); | |
0b8ebeac | 153 | mutex_unlock(&priv->linear_lock); |
96f60e37 RK |
154 | if (ret) { |
155 | kfree(node); | |
156 | return ret; | |
157 | } | |
158 | ||
159 | obj->linear = node; | |
160 | ||
161 | /* Ensure that the memory we're returning is cleared. */ | |
162 | ptr = ioremap_wc(obj->linear->start, size); | |
163 | if (!ptr) { | |
0b8ebeac | 164 | mutex_lock(&priv->linear_lock); |
96f60e37 | 165 | drm_mm_remove_node(obj->linear); |
0b8ebeac | 166 | mutex_unlock(&priv->linear_lock); |
96f60e37 RK |
167 | kfree(obj->linear); |
168 | obj->linear = NULL; | |
169 | return -ENOMEM; | |
170 | } | |
171 | ||
172 | memset_io(ptr, 0, size); | |
173 | iounmap(ptr); | |
174 | ||
175 | obj->phys_addr = obj->linear->start; | |
176 | obj->dev_addr = obj->linear->start; | |
b4005857 | 177 | obj->mapped = true; |
96f60e37 RK |
178 | } |
179 | ||
7513e095 RK |
180 | DRM_DEBUG_DRIVER("obj %p phys %#llx dev %#llx\n", obj, |
181 | (unsigned long long)obj->phys_addr, | |
182 | (unsigned long long)obj->dev_addr); | |
96f60e37 RK |
183 | |
184 | return 0; | |
185 | } | |
186 | ||
187 | void * | |
188 | armada_gem_map_object(struct drm_device *dev, struct armada_gem_object *dobj) | |
189 | { | |
190 | /* only linear objects need to be ioremap'd */ | |
191 | if (!dobj->addr && dobj->linear) | |
192 | dobj->addr = ioremap_wc(dobj->phys_addr, dobj->obj.size); | |
193 | return dobj->addr; | |
194 | } | |
195 | ||
196 | struct armada_gem_object * | |
197 | armada_gem_alloc_private_object(struct drm_device *dev, size_t size) | |
198 | { | |
199 | struct armada_gem_object *obj; | |
200 | ||
201 | size = roundup_gem_size(size); | |
202 | ||
203 | obj = kzalloc(sizeof(*obj), GFP_KERNEL); | |
204 | if (!obj) | |
205 | return NULL; | |
206 | ||
207 | drm_gem_private_object_init(dev, &obj->obj, size); | |
96f60e37 RK |
208 | |
209 | DRM_DEBUG_DRIVER("alloc private obj %p size %zu\n", obj, size); | |
210 | ||
211 | return obj; | |
212 | } | |
213 | ||
42b45459 | 214 | static struct armada_gem_object *armada_gem_alloc_object(struct drm_device *dev, |
96f60e37 RK |
215 | size_t size) |
216 | { | |
217 | struct armada_gem_object *obj; | |
218 | struct address_space *mapping; | |
219 | ||
220 | size = roundup_gem_size(size); | |
221 | ||
222 | obj = kzalloc(sizeof(*obj), GFP_KERNEL); | |
223 | if (!obj) | |
224 | return NULL; | |
225 | ||
226 | if (drm_gem_object_init(dev, &obj->obj, size)) { | |
227 | kfree(obj); | |
228 | return NULL; | |
229 | } | |
230 | ||
93c76a3d | 231 | mapping = obj->obj.filp->f_mapping; |
96f60e37 RK |
232 | mapping_set_gfp_mask(mapping, GFP_HIGHUSER | __GFP_RECLAIMABLE); |
233 | ||
234 | DRM_DEBUG_DRIVER("alloc obj %p size %zu\n", obj, size); | |
235 | ||
236 | return obj; | |
237 | } | |
238 | ||
239 | /* Dumb alloc support */ | |
240 | int armada_gem_dumb_create(struct drm_file *file, struct drm_device *dev, | |
241 | struct drm_mode_create_dumb *args) | |
242 | { | |
243 | struct armada_gem_object *dobj; | |
244 | u32 handle; | |
245 | size_t size; | |
246 | int ret; | |
247 | ||
248 | args->pitch = armada_pitch(args->width, args->bpp); | |
249 | args->size = size = args->pitch * args->height; | |
250 | ||
251 | dobj = armada_gem_alloc_private_object(dev, size); | |
252 | if (dobj == NULL) | |
253 | return -ENOMEM; | |
254 | ||
255 | ret = armada_gem_linear_back(dev, dobj); | |
256 | if (ret) | |
257 | goto err; | |
258 | ||
259 | ret = drm_gem_handle_create(file, &dobj->obj, &handle); | |
260 | if (ret) | |
261 | goto err; | |
262 | ||
263 | args->handle = handle; | |
264 | ||
265 | /* drop reference from allocate - handle holds it now */ | |
266 | DRM_DEBUG_DRIVER("obj %p size %zu handle %#x\n", dobj, size, handle); | |
267 | err: | |
4c3cf375 | 268 | drm_gem_object_put_unlocked(&dobj->obj); |
96f60e37 RK |
269 | return ret; |
270 | } | |
271 | ||
96f60e37 RK |
272 | /* Private driver gem ioctls */ |
273 | int armada_gem_create_ioctl(struct drm_device *dev, void *data, | |
274 | struct drm_file *file) | |
275 | { | |
276 | struct drm_armada_gem_create *args = data; | |
277 | struct armada_gem_object *dobj; | |
278 | size_t size; | |
279 | u32 handle; | |
280 | int ret; | |
281 | ||
282 | if (args->size == 0) | |
283 | return -ENOMEM; | |
284 | ||
285 | size = args->size; | |
286 | ||
287 | dobj = armada_gem_alloc_object(dev, size); | |
288 | if (dobj == NULL) | |
289 | return -ENOMEM; | |
290 | ||
291 | ret = drm_gem_handle_create(file, &dobj->obj, &handle); | |
292 | if (ret) | |
293 | goto err; | |
294 | ||
295 | args->handle = handle; | |
296 | ||
297 | /* drop reference from allocate - handle holds it now */ | |
298 | DRM_DEBUG_DRIVER("obj %p size %zu handle %#x\n", dobj, size, handle); | |
299 | err: | |
4c3cf375 | 300 | drm_gem_object_put_unlocked(&dobj->obj); |
96f60e37 RK |
301 | return ret; |
302 | } | |
303 | ||
304 | /* Map a shmem-backed object into process memory space */ | |
305 | int armada_gem_mmap_ioctl(struct drm_device *dev, void *data, | |
306 | struct drm_file *file) | |
307 | { | |
308 | struct drm_armada_gem_mmap *args = data; | |
309 | struct armada_gem_object *dobj; | |
310 | unsigned long addr; | |
311 | ||
a8ad0bd8 | 312 | dobj = armada_gem_object_lookup(file, args->handle); |
96f60e37 RK |
313 | if (dobj == NULL) |
314 | return -ENOENT; | |
315 | ||
316 | if (!dobj->obj.filp) { | |
4c3cf375 | 317 | drm_gem_object_put_unlocked(&dobj->obj); |
96f60e37 RK |
318 | return -EINVAL; |
319 | } | |
320 | ||
321 | addr = vm_mmap(dobj->obj.filp, 0, args->size, PROT_READ | PROT_WRITE, | |
322 | MAP_SHARED, args->offset); | |
4c3cf375 | 323 | drm_gem_object_put_unlocked(&dobj->obj); |
96f60e37 RK |
324 | if (IS_ERR_VALUE(addr)) |
325 | return addr; | |
326 | ||
327 | args->addr = addr; | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | int armada_gem_pwrite_ioctl(struct drm_device *dev, void *data, | |
333 | struct drm_file *file) | |
334 | { | |
335 | struct drm_armada_gem_pwrite *args = data; | |
336 | struct armada_gem_object *dobj; | |
337 | char __user *ptr; | |
338 | int ret; | |
339 | ||
340 | DRM_DEBUG_DRIVER("handle %u off %u size %u ptr 0x%llx\n", | |
341 | args->handle, args->offset, args->size, args->ptr); | |
342 | ||
343 | if (args->size == 0) | |
344 | return 0; | |
345 | ||
346 | ptr = (char __user *)(uintptr_t)args->ptr; | |
347 | ||
348 | if (!access_ok(VERIFY_READ, ptr, args->size)) | |
349 | return -EFAULT; | |
350 | ||
4bce9f6e | 351 | ret = fault_in_pages_readable(ptr, args->size); |
96f60e37 RK |
352 | if (ret) |
353 | return ret; | |
354 | ||
a8ad0bd8 | 355 | dobj = armada_gem_object_lookup(file, args->handle); |
96f60e37 RK |
356 | if (dobj == NULL) |
357 | return -ENOENT; | |
358 | ||
359 | /* Must be a kernel-mapped object */ | |
360 | if (!dobj->addr) | |
361 | return -EINVAL; | |
362 | ||
363 | if (args->offset > dobj->obj.size || | |
364 | args->size > dobj->obj.size - args->offset) { | |
365 | DRM_ERROR("invalid size: object size %u\n", dobj->obj.size); | |
366 | ret = -EINVAL; | |
367 | goto unref; | |
368 | } | |
369 | ||
370 | if (copy_from_user(dobj->addr + args->offset, ptr, args->size)) { | |
371 | ret = -EFAULT; | |
372 | } else if (dobj->update) { | |
373 | dobj->update(dobj->update_data); | |
374 | ret = 0; | |
375 | } | |
376 | ||
377 | unref: | |
4c3cf375 | 378 | drm_gem_object_put_unlocked(&dobj->obj); |
96f60e37 RK |
379 | return ret; |
380 | } | |
381 | ||
382 | /* Prime support */ | |
42b45459 | 383 | static struct sg_table * |
96f60e37 RK |
384 | armada_gem_prime_map_dma_buf(struct dma_buf_attachment *attach, |
385 | enum dma_data_direction dir) | |
386 | { | |
387 | struct drm_gem_object *obj = attach->dmabuf->priv; | |
388 | struct armada_gem_object *dobj = drm_to_armada_gem(obj); | |
389 | struct scatterlist *sg; | |
390 | struct sg_table *sgt; | |
391 | int i, num; | |
392 | ||
393 | sgt = kmalloc(sizeof(*sgt), GFP_KERNEL); | |
394 | if (!sgt) | |
395 | return NULL; | |
396 | ||
397 | if (dobj->obj.filp) { | |
398 | struct address_space *mapping; | |
96f60e37 RK |
399 | int count; |
400 | ||
401 | count = dobj->obj.size / PAGE_SIZE; | |
402 | if (sg_alloc_table(sgt, count, GFP_KERNEL)) | |
403 | goto free_sgt; | |
404 | ||
93c76a3d | 405 | mapping = dobj->obj.filp->f_mapping; |
96f60e37 RK |
406 | |
407 | for_each_sg(sgt->sgl, sg, count, i) { | |
408 | struct page *page; | |
409 | ||
2524fc7f | 410 | page = shmem_read_mapping_page(mapping, i); |
96f60e37 RK |
411 | if (IS_ERR(page)) { |
412 | num = i; | |
413 | goto release; | |
414 | } | |
415 | ||
416 | sg_set_page(sg, page, PAGE_SIZE, 0); | |
417 | } | |
418 | ||
419 | if (dma_map_sg(attach->dev, sgt->sgl, sgt->nents, dir) == 0) { | |
420 | num = sgt->nents; | |
421 | goto release; | |
422 | } | |
423 | } else if (dobj->page) { | |
424 | /* Single contiguous page */ | |
425 | if (sg_alloc_table(sgt, 1, GFP_KERNEL)) | |
426 | goto free_sgt; | |
427 | ||
428 | sg_set_page(sgt->sgl, dobj->page, dobj->obj.size, 0); | |
429 | ||
430 | if (dma_map_sg(attach->dev, sgt->sgl, sgt->nents, dir) == 0) | |
431 | goto free_table; | |
432 | } else if (dobj->linear) { | |
433 | /* Single contiguous physical region - no struct page */ | |
434 | if (sg_alloc_table(sgt, 1, GFP_KERNEL)) | |
435 | goto free_sgt; | |
436 | sg_dma_address(sgt->sgl) = dobj->dev_addr; | |
437 | sg_dma_len(sgt->sgl) = dobj->obj.size; | |
438 | } else { | |
439 | goto free_sgt; | |
440 | } | |
441 | return sgt; | |
442 | ||
443 | release: | |
444 | for_each_sg(sgt->sgl, sg, num, i) | |
09cbfeaf | 445 | put_page(sg_page(sg)); |
96f60e37 RK |
446 | free_table: |
447 | sg_free_table(sgt); | |
448 | free_sgt: | |
449 | kfree(sgt); | |
450 | return NULL; | |
451 | } | |
452 | ||
453 | static void armada_gem_prime_unmap_dma_buf(struct dma_buf_attachment *attach, | |
454 | struct sg_table *sgt, enum dma_data_direction dir) | |
455 | { | |
456 | struct drm_gem_object *obj = attach->dmabuf->priv; | |
457 | struct armada_gem_object *dobj = drm_to_armada_gem(obj); | |
458 | int i; | |
459 | ||
460 | if (!dobj->linear) | |
461 | dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir); | |
462 | ||
463 | if (dobj->obj.filp) { | |
464 | struct scatterlist *sg; | |
465 | for_each_sg(sgt->sgl, sg, sgt->nents, i) | |
09cbfeaf | 466 | put_page(sg_page(sg)); |
96f60e37 RK |
467 | } |
468 | ||
469 | sg_free_table(sgt); | |
470 | kfree(sgt); | |
471 | } | |
472 | ||
473 | static void *armada_gem_dmabuf_no_kmap(struct dma_buf *buf, unsigned long n) | |
474 | { | |
475 | return NULL; | |
476 | } | |
477 | ||
478 | static void | |
479 | armada_gem_dmabuf_no_kunmap(struct dma_buf *buf, unsigned long n, void *addr) | |
480 | { | |
481 | } | |
482 | ||
483 | static int | |
484 | armada_gem_dmabuf_mmap(struct dma_buf *buf, struct vm_area_struct *vma) | |
485 | { | |
486 | return -EINVAL; | |
487 | } | |
488 | ||
489 | static const struct dma_buf_ops armada_gem_prime_dmabuf_ops = { | |
490 | .map_dma_buf = armada_gem_prime_map_dma_buf, | |
491 | .unmap_dma_buf = armada_gem_prime_unmap_dma_buf, | |
492 | .release = drm_gem_dmabuf_release, | |
f9b67f00 LG |
493 | .map = armada_gem_dmabuf_no_kmap, |
494 | .unmap = armada_gem_dmabuf_no_kunmap, | |
96f60e37 RK |
495 | .mmap = armada_gem_dmabuf_mmap, |
496 | }; | |
497 | ||
498 | struct dma_buf * | |
499 | armada_gem_prime_export(struct drm_device *dev, struct drm_gem_object *obj, | |
500 | int flags) | |
501 | { | |
d8fbe341 SS |
502 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); |
503 | ||
504 | exp_info.ops = &armada_gem_prime_dmabuf_ops; | |
505 | exp_info.size = obj->size; | |
506 | exp_info.flags = O_RDWR; | |
507 | exp_info.priv = obj; | |
508 | ||
a4fce9cb | 509 | return drm_gem_dmabuf_export(dev, &exp_info); |
96f60e37 RK |
510 | } |
511 | ||
512 | struct drm_gem_object * | |
513 | armada_gem_prime_import(struct drm_device *dev, struct dma_buf *buf) | |
514 | { | |
515 | struct dma_buf_attachment *attach; | |
516 | struct armada_gem_object *dobj; | |
517 | ||
518 | if (buf->ops == &armada_gem_prime_dmabuf_ops) { | |
519 | struct drm_gem_object *obj = buf->priv; | |
520 | if (obj->dev == dev) { | |
521 | /* | |
522 | * Importing our own dmabuf(s) increases the | |
523 | * refcount on the gem object itself. | |
524 | */ | |
4c3cf375 | 525 | drm_gem_object_get(obj); |
96f60e37 RK |
526 | return obj; |
527 | } | |
528 | } | |
529 | ||
530 | attach = dma_buf_attach(buf, dev->dev); | |
531 | if (IS_ERR(attach)) | |
532 | return ERR_CAST(attach); | |
533 | ||
534 | dobj = armada_gem_alloc_private_object(dev, buf->size); | |
535 | if (!dobj) { | |
536 | dma_buf_detach(buf, attach); | |
537 | return ERR_PTR(-ENOMEM); | |
538 | } | |
539 | ||
540 | dobj->obj.import_attach = attach; | |
5cd52688 | 541 | get_dma_buf(buf); |
96f60e37 RK |
542 | |
543 | /* | |
544 | * Don't call dma_buf_map_attachment() here - it maps the | |
545 | * scatterlist immediately for DMA, and this is not always | |
546 | * an appropriate thing to do. | |
547 | */ | |
548 | return &dobj->obj; | |
549 | } | |
550 | ||
551 | int armada_gem_map_import(struct armada_gem_object *dobj) | |
552 | { | |
553 | int ret; | |
554 | ||
555 | dobj->sgt = dma_buf_map_attachment(dobj->obj.import_attach, | |
244a2419 | 556 | DMA_TO_DEVICE); |
96f60e37 RK |
557 | if (IS_ERR(dobj->sgt)) { |
558 | ret = PTR_ERR(dobj->sgt); | |
559 | dobj->sgt = NULL; | |
560 | DRM_ERROR("dma_buf_map_attachment() error: %d\n", ret); | |
561 | return ret; | |
562 | } | |
563 | if (dobj->sgt->nents > 1) { | |
564 | DRM_ERROR("dma_buf_map_attachment() returned an (unsupported) scattered list\n"); | |
565 | return -EINVAL; | |
566 | } | |
567 | if (sg_dma_len(dobj->sgt->sgl) < dobj->obj.size) { | |
568 | DRM_ERROR("dma_buf_map_attachment() returned a small buffer\n"); | |
569 | return -EINVAL; | |
570 | } | |
571 | dobj->dev_addr = sg_dma_address(dobj->sgt->sgl); | |
b4005857 | 572 | dobj->mapped = true; |
96f60e37 RK |
573 | return 0; |
574 | } |