]>
Commit | Line | Data |
---|---|---|
1c248b7d ID |
1 | /* exynos_drm_gem.c |
2 | * | |
3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
4 | * Author: Inki Dae <inki.dae@samsung.com> | |
5 | * | |
d81aecb5 ID |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
1c248b7d ID |
10 | */ |
11 | ||
760285e7 | 12 | #include <drm/drmP.h> |
0de23977 | 13 | #include <drm/drm_vma_manager.h> |
1c248b7d | 14 | |
2b35892e | 15 | #include <linux/shmem_fs.h> |
01ed50dd | 16 | #include <linux/dma-buf.h> |
01c8f1c4 | 17 | #include <linux/pfn_t.h> |
1c248b7d ID |
18 | #include <drm/exynos_drm.h> |
19 | ||
20 | #include "exynos_drm_drv.h" | |
21 | #include "exynos_drm_gem.h" | |
3fec4532 | 22 | #include "exynos_drm_iommu.h" |
1c248b7d | 23 | |
813fd67b | 24 | static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem) |
2a8cb489 | 25 | { |
813fd67b | 26 | struct drm_device *dev = exynos_gem->base.dev; |
00085f1e | 27 | unsigned long attr; |
2a8cb489 | 28 | unsigned int nr_pages; |
df547bf7 MS |
29 | struct sg_table sgt; |
30 | int ret = -ENOMEM; | |
2a8cb489 | 31 | |
813fd67b | 32 | if (exynos_gem->dma_addr) { |
2a8cb489 JS |
33 | DRM_DEBUG_KMS("already allocated.\n"); |
34 | return 0; | |
35 | } | |
36 | ||
00085f1e | 37 | exynos_gem->dma_attrs = 0; |
2a8cb489 JS |
38 | |
39 | /* | |
40 | * if EXYNOS_BO_CONTIG, fully physically contiguous memory | |
41 | * region will be allocated else physically contiguous | |
42 | * as possible. | |
43 | */ | |
813fd67b | 44 | if (!(exynos_gem->flags & EXYNOS_BO_NONCONTIG)) |
00085f1e | 45 | exynos_gem->dma_attrs |= DMA_ATTR_FORCE_CONTIGUOUS; |
2a8cb489 JS |
46 | |
47 | /* | |
48 | * if EXYNOS_BO_WC or EXYNOS_BO_NONCACHABLE, writecombine mapping | |
49 | * else cachable mapping. | |
50 | */ | |
813fd67b JS |
51 | if (exynos_gem->flags & EXYNOS_BO_WC || |
52 | !(exynos_gem->flags & EXYNOS_BO_CACHABLE)) | |
2a8cb489 JS |
53 | attr = DMA_ATTR_WRITE_COMBINE; |
54 | else | |
55 | attr = DMA_ATTR_NON_CONSISTENT; | |
56 | ||
00085f1e KK |
57 | exynos_gem->dma_attrs |= attr; |
58 | exynos_gem->dma_attrs |= DMA_ATTR_NO_KERNEL_MAPPING; | |
2a8cb489 | 59 | |
813fd67b | 60 | nr_pages = exynos_gem->size >> PAGE_SHIFT; |
2a8cb489 | 61 | |
df547bf7 MS |
62 | exynos_gem->pages = drm_calloc_large(nr_pages, sizeof(struct page *)); |
63 | if (!exynos_gem->pages) { | |
64 | DRM_ERROR("failed to allocate pages.\n"); | |
65 | return -ENOMEM; | |
333e8e58 | 66 | } |
2a8cb489 | 67 | |
f43c3596 | 68 | exynos_gem->cookie = dma_alloc_attrs(to_dma_dev(dev), exynos_gem->size, |
813fd67b | 69 | &exynos_gem->dma_addr, GFP_KERNEL, |
00085f1e | 70 | exynos_gem->dma_attrs); |
813fd67b | 71 | if (!exynos_gem->cookie) { |
333e8e58 | 72 | DRM_ERROR("failed to allocate buffer.\n"); |
df547bf7 MS |
73 | goto err_free; |
74 | } | |
75 | ||
f43c3596 | 76 | ret = dma_get_sgtable_attrs(to_dma_dev(dev), &sgt, exynos_gem->cookie, |
df547bf7 | 77 | exynos_gem->dma_addr, exynos_gem->size, |
00085f1e | 78 | exynos_gem->dma_attrs); |
df547bf7 MS |
79 | if (ret < 0) { |
80 | DRM_ERROR("failed to get sgtable.\n"); | |
81 | goto err_dma_free; | |
333e8e58 JS |
82 | } |
83 | ||
df547bf7 MS |
84 | if (drm_prime_sg_to_page_addr_arrays(&sgt, exynos_gem->pages, NULL, |
85 | nr_pages)) { | |
86 | DRM_ERROR("invalid sgtable.\n"); | |
87 | ret = -EINVAL; | |
88 | goto err_sgt_free; | |
2a8cb489 JS |
89 | } |
90 | ||
df547bf7 MS |
91 | sg_free_table(&sgt); |
92 | ||
2a8cb489 | 93 | DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n", |
813fd67b | 94 | (unsigned long)exynos_gem->dma_addr, exynos_gem->size); |
2a8cb489 JS |
95 | |
96 | return 0; | |
df547bf7 MS |
97 | |
98 | err_sgt_free: | |
99 | sg_free_table(&sgt); | |
100 | err_dma_free: | |
f43c3596 | 101 | dma_free_attrs(to_dma_dev(dev), exynos_gem->size, exynos_gem->cookie, |
00085f1e | 102 | exynos_gem->dma_addr, exynos_gem->dma_attrs); |
df547bf7 MS |
103 | err_free: |
104 | drm_free_large(exynos_gem->pages); | |
105 | ||
106 | return ret; | |
2a8cb489 JS |
107 | } |
108 | ||
813fd67b | 109 | static void exynos_drm_free_buf(struct exynos_drm_gem *exynos_gem) |
2a8cb489 | 110 | { |
813fd67b | 111 | struct drm_device *dev = exynos_gem->base.dev; |
2a8cb489 | 112 | |
813fd67b | 113 | if (!exynos_gem->dma_addr) { |
2a8cb489 JS |
114 | DRM_DEBUG_KMS("dma_addr is invalid.\n"); |
115 | return; | |
116 | } | |
117 | ||
118 | DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n", | |
813fd67b | 119 | (unsigned long)exynos_gem->dma_addr, exynos_gem->size); |
2a8cb489 | 120 | |
f43c3596 | 121 | dma_free_attrs(to_dma_dev(dev), exynos_gem->size, exynos_gem->cookie, |
813fd67b | 122 | (dma_addr_t)exynos_gem->dma_addr, |
00085f1e | 123 | exynos_gem->dma_attrs); |
333e8e58 | 124 | |
df547bf7 | 125 | drm_free_large(exynos_gem->pages); |
2a8cb489 JS |
126 | } |
127 | ||
2364839a JS |
128 | static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, |
129 | struct drm_file *file_priv, | |
130 | unsigned int *handle) | |
1c248b7d | 131 | { |
1c248b7d ID |
132 | int ret; |
133 | ||
1c248b7d ID |
134 | /* |
135 | * allocate a id of idr table where the obj is registered | |
136 | * and handle has the id what user can see. | |
137 | */ | |
138 | ret = drm_gem_handle_create(file_priv, obj, handle); | |
139 | if (ret) | |
2364839a | 140 | return ret; |
1c248b7d ID |
141 | |
142 | DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); | |
143 | ||
144 | /* drop reference from allocate - handle holds it now. */ | |
145 | drm_gem_object_unreference_unlocked(obj); | |
146 | ||
2364839a JS |
147 | return 0; |
148 | } | |
149 | ||
813fd67b | 150 | void exynos_drm_gem_destroy(struct exynos_drm_gem *exynos_gem) |
2364839a | 151 | { |
813fd67b | 152 | struct drm_gem_object *obj = &exynos_gem->base; |
2364839a | 153 | |
a8e11d1c | 154 | DRM_DEBUG_KMS("handle count = %d\n", obj->handle_count); |
1c248b7d | 155 | |
c374e731 ID |
156 | /* |
157 | * do not release memory region from exporter. | |
158 | * | |
159 | * the region will be released by exporter | |
160 | * once dmabuf's refcount becomes 0. | |
161 | */ | |
162 | if (obj->import_attach) | |
813fd67b | 163 | drm_prime_gem_destroy(obj, exynos_gem->sgt); |
7c93537a | 164 | else |
813fd67b | 165 | exynos_drm_free_buf(exynos_gem); |
2b35892e | 166 | |
2364839a | 167 | /* release file pointer to gem object. */ |
1c248b7d ID |
168 | drm_gem_object_release(obj); |
169 | ||
813fd67b | 170 | kfree(exynos_gem); |
2364839a JS |
171 | } |
172 | ||
a4f19aaa ID |
173 | unsigned long exynos_drm_gem_get_size(struct drm_device *dev, |
174 | unsigned int gem_handle, | |
175 | struct drm_file *file_priv) | |
176 | { | |
813fd67b | 177 | struct exynos_drm_gem *exynos_gem; |
a4f19aaa ID |
178 | struct drm_gem_object *obj; |
179 | ||
a8ad0bd8 | 180 | obj = drm_gem_object_lookup(file_priv, gem_handle); |
a4f19aaa ID |
181 | if (!obj) { |
182 | DRM_ERROR("failed to lookup gem object.\n"); | |
183 | return 0; | |
184 | } | |
185 | ||
813fd67b | 186 | exynos_gem = to_exynos_gem(obj); |
a4f19aaa ID |
187 | |
188 | drm_gem_object_unreference_unlocked(obj); | |
189 | ||
813fd67b | 190 | return exynos_gem->size; |
a4f19aaa ID |
191 | } |
192 | ||
813fd67b JS |
193 | static struct exynos_drm_gem *exynos_drm_gem_init(struct drm_device *dev, |
194 | unsigned long size) | |
2364839a | 195 | { |
813fd67b | 196 | struct exynos_drm_gem *exynos_gem; |
2364839a JS |
197 | struct drm_gem_object *obj; |
198 | int ret; | |
199 | ||
813fd67b JS |
200 | exynos_gem = kzalloc(sizeof(*exynos_gem), GFP_KERNEL); |
201 | if (!exynos_gem) | |
5f3f4266 | 202 | return ERR_PTR(-ENOMEM); |
2364839a | 203 | |
813fd67b JS |
204 | exynos_gem->size = size; |
205 | obj = &exynos_gem->base; | |
2364839a JS |
206 | |
207 | ret = drm_gem_object_init(dev, obj, size); | |
208 | if (ret < 0) { | |
209 | DRM_ERROR("failed to initialize gem object\n"); | |
813fd67b | 210 | kfree(exynos_gem); |
5f3f4266 | 211 | return ERR_PTR(ret); |
2364839a JS |
212 | } |
213 | ||
48cf53f4 JS |
214 | ret = drm_gem_create_mmap_offset(obj); |
215 | if (ret < 0) { | |
216 | drm_gem_object_release(obj); | |
813fd67b | 217 | kfree(exynos_gem); |
48cf53f4 JS |
218 | return ERR_PTR(ret); |
219 | } | |
220 | ||
9cdf0ed2 | 221 | DRM_DEBUG_KMS("created file object = %pK\n", obj->filp); |
2364839a | 222 | |
813fd67b | 223 | return exynos_gem; |
1c248b7d ID |
224 | } |
225 | ||
813fd67b JS |
226 | struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev, |
227 | unsigned int flags, | |
228 | unsigned long size) | |
f088d5a9 | 229 | { |
813fd67b | 230 | struct exynos_drm_gem *exynos_gem; |
2b35892e | 231 | int ret; |
f088d5a9 | 232 | |
c4130bcd | 233 | if (flags & ~(EXYNOS_BO_MASK)) { |
63eb0a12 | 234 | DRM_ERROR("invalid GEM buffer flags: %u\n", flags); |
c4130bcd JS |
235 | return ERR_PTR(-EINVAL); |
236 | } | |
237 | ||
dcf9af82 | 238 | if (!size) { |
63eb0a12 | 239 | DRM_ERROR("invalid GEM buffer size: %lu\n", size); |
dcf9af82 ID |
240 | return ERR_PTR(-EINVAL); |
241 | } | |
242 | ||
eb57da88 | 243 | size = roundup(size, PAGE_SIZE); |
f088d5a9 | 244 | |
813fd67b JS |
245 | exynos_gem = exynos_drm_gem_init(dev, size); |
246 | if (IS_ERR(exynos_gem)) | |
247 | return exynos_gem; | |
2b35892e ID |
248 | |
249 | /* set memory type and cache attribute from user side. */ | |
813fd67b | 250 | exynos_gem->flags = flags; |
2b35892e | 251 | |
813fd67b | 252 | ret = exynos_drm_alloc_buf(exynos_gem); |
2a8cb489 | 253 | if (ret < 0) { |
813fd67b JS |
254 | drm_gem_object_release(&exynos_gem->base); |
255 | kfree(exynos_gem); | |
2a8cb489 JS |
256 | return ERR_PTR(ret); |
257 | } | |
f088d5a9 | 258 | |
813fd67b | 259 | return exynos_gem; |
f088d5a9 ID |
260 | } |
261 | ||
1c248b7d | 262 | int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, |
ee5e770e | 263 | struct drm_file *file_priv) |
1c248b7d ID |
264 | { |
265 | struct drm_exynos_gem_create *args = data; | |
813fd67b | 266 | struct exynos_drm_gem *exynos_gem; |
2364839a | 267 | int ret; |
1c248b7d | 268 | |
813fd67b JS |
269 | exynos_gem = exynos_drm_gem_create(dev, args->flags, args->size); |
270 | if (IS_ERR(exynos_gem)) | |
271 | return PTR_ERR(exynos_gem); | |
1c248b7d | 272 | |
813fd67b JS |
273 | ret = exynos_drm_gem_handle_create(&exynos_gem->base, file_priv, |
274 | &args->handle); | |
2364839a | 275 | if (ret) { |
813fd67b | 276 | exynos_drm_gem_destroy(exynos_gem); |
2364839a JS |
277 | return ret; |
278 | } | |
279 | ||
1c248b7d ID |
280 | return 0; |
281 | } | |
282 | ||
6564c65f JS |
283 | int exynos_drm_gem_map_ioctl(struct drm_device *dev, void *data, |
284 | struct drm_file *file_priv) | |
285 | { | |
286 | struct drm_exynos_gem_map *args = data; | |
287 | ||
288 | return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle, | |
289 | &args->offset); | |
290 | } | |
291 | ||
d87342c1 | 292 | dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, |
f0b1bda7 | 293 | unsigned int gem_handle, |
d87342c1 | 294 | struct drm_file *filp) |
f0b1bda7 | 295 | { |
813fd67b | 296 | struct exynos_drm_gem *exynos_gem; |
f0b1bda7 ID |
297 | struct drm_gem_object *obj; |
298 | ||
a8ad0bd8 | 299 | obj = drm_gem_object_lookup(filp, gem_handle); |
f0b1bda7 ID |
300 | if (!obj) { |
301 | DRM_ERROR("failed to lookup gem object.\n"); | |
302 | return ERR_PTR(-EINVAL); | |
303 | } | |
304 | ||
813fd67b | 305 | exynos_gem = to_exynos_gem(obj); |
f0b1bda7 | 306 | |
813fd67b | 307 | return &exynos_gem->dma_addr; |
f0b1bda7 ID |
308 | } |
309 | ||
310 | void exynos_drm_gem_put_dma_addr(struct drm_device *dev, | |
311 | unsigned int gem_handle, | |
d87342c1 | 312 | struct drm_file *filp) |
f0b1bda7 | 313 | { |
f0b1bda7 ID |
314 | struct drm_gem_object *obj; |
315 | ||
a8ad0bd8 | 316 | obj = drm_gem_object_lookup(filp, gem_handle); |
f0b1bda7 ID |
317 | if (!obj) { |
318 | DRM_ERROR("failed to lookup gem object.\n"); | |
319 | return; | |
320 | } | |
321 | ||
f0b1bda7 ID |
322 | drm_gem_object_unreference_unlocked(obj); |
323 | ||
324 | /* | |
325 | * decrease obj->refcount one more time because we has already | |
326 | * increased it at exynos_drm_gem_get_dma_addr(). | |
327 | */ | |
328 | drm_gem_object_unreference_unlocked(obj); | |
329 | } | |
330 | ||
813fd67b | 331 | static int exynos_drm_gem_mmap_buffer(struct exynos_drm_gem *exynos_gem, |
ee5e770e | 332 | struct vm_area_struct *vma) |
1c248b7d | 333 | { |
813fd67b | 334 | struct drm_device *drm_dev = exynos_gem->base.dev; |
0519f9a1 | 335 | unsigned long vm_size; |
5b07c660 | 336 | int ret; |
1c248b7d | 337 | |
832316c7 ID |
338 | vma->vm_flags &= ~VM_PFNMAP; |
339 | vma->vm_pgoff = 0; | |
1c248b7d | 340 | |
0519f9a1 | 341 | vm_size = vma->vm_end - vma->vm_start; |
2b35892e | 342 | |
1c248b7d | 343 | /* check if user-requested size is valid. */ |
813fd67b | 344 | if (vm_size > exynos_gem->size) |
1c248b7d ID |
345 | return -EINVAL; |
346 | ||
f43c3596 | 347 | ret = dma_mmap_attrs(to_dma_dev(drm_dev), vma, exynos_gem->cookie, |
813fd67b | 348 | exynos_gem->dma_addr, exynos_gem->size, |
00085f1e | 349 | exynos_gem->dma_attrs); |
5b07c660 ID |
350 | if (ret < 0) { |
351 | DRM_ERROR("failed to mmap.\n"); | |
352 | return ret; | |
353 | } | |
354 | ||
1c248b7d ID |
355 | return 0; |
356 | } | |
357 | ||
40cd7e0c ID |
358 | int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, |
359 | struct drm_file *file_priv) | |
b4cfd4dd | 360 | { |
813fd67b | 361 | struct exynos_drm_gem *exynos_gem; |
40cd7e0c ID |
362 | struct drm_exynos_gem_info *args = data; |
363 | struct drm_gem_object *obj; | |
364 | ||
a8ad0bd8 | 365 | obj = drm_gem_object_lookup(file_priv, args->handle); |
40cd7e0c ID |
366 | if (!obj) { |
367 | DRM_ERROR("failed to lookup gem object.\n"); | |
40cd7e0c ID |
368 | return -EINVAL; |
369 | } | |
370 | ||
813fd67b | 371 | exynos_gem = to_exynos_gem(obj); |
40cd7e0c | 372 | |
813fd67b JS |
373 | args->flags = exynos_gem->flags; |
374 | args->size = exynos_gem->size; | |
40cd7e0c | 375 | |
6c991a22 | 376 | drm_gem_object_unreference_unlocked(obj); |
40cd7e0c ID |
377 | |
378 | return 0; | |
379 | } | |
380 | ||
ee5e770e | 381 | void exynos_drm_gem_free_object(struct drm_gem_object *obj) |
1c248b7d | 382 | { |
813fd67b | 383 | exynos_drm_gem_destroy(to_exynos_gem(obj)); |
1c248b7d ID |
384 | } |
385 | ||
386 | int exynos_drm_gem_dumb_create(struct drm_file *file_priv, | |
ee5e770e JS |
387 | struct drm_device *dev, |
388 | struct drm_mode_create_dumb *args) | |
1c248b7d | 389 | { |
813fd67b | 390 | struct exynos_drm_gem *exynos_gem; |
333e8e58 | 391 | unsigned int flags; |
2364839a | 392 | int ret; |
1c248b7d | 393 | |
1c248b7d | 394 | /* |
c6b78bc8 | 395 | * allocate memory to be used for framebuffer. |
1c248b7d ID |
396 | * - this callback would be called by user application |
397 | * with DRM_IOCTL_MODE_CREATE_DUMB command. | |
398 | */ | |
399 | ||
3fd6b694 | 400 | args->pitch = args->width * ((args->bpp + 7) / 8); |
7da5907c | 401 | args->size = args->pitch * args->height; |
1c248b7d | 402 | |
333e8e58 JS |
403 | if (is_drm_iommu_supported(dev)) |
404 | flags = EXYNOS_BO_NONCONTIG | EXYNOS_BO_WC; | |
405 | else | |
406 | flags = EXYNOS_BO_CONTIG | EXYNOS_BO_WC; | |
3fec4532 | 407 | |
813fd67b JS |
408 | exynos_gem = exynos_drm_gem_create(dev, flags, args->size); |
409 | if (IS_ERR(exynos_gem)) { | |
122beea8 | 410 | dev_warn(dev->dev, "FB allocation failed.\n"); |
813fd67b | 411 | return PTR_ERR(exynos_gem); |
122beea8 | 412 | } |
1c248b7d | 413 | |
813fd67b JS |
414 | ret = exynos_drm_gem_handle_create(&exynos_gem->base, file_priv, |
415 | &args->handle); | |
2364839a | 416 | if (ret) { |
813fd67b | 417 | exynos_drm_gem_destroy(exynos_gem); |
2364839a JS |
418 | return ret; |
419 | } | |
420 | ||
1c248b7d ID |
421 | return 0; |
422 | } | |
423 | ||
424 | int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, | |
ee5e770e JS |
425 | struct drm_device *dev, uint32_t handle, |
426 | uint64_t *offset) | |
1c248b7d | 427 | { |
1c248b7d | 428 | struct drm_gem_object *obj; |
2d91cf17 | 429 | int ret = 0; |
1c248b7d | 430 | |
1c248b7d ID |
431 | /* |
432 | * get offset of memory allocated for drm framebuffer. | |
433 | * - this callback would be called by user application | |
434 | * with DRM_IOCTL_MODE_MAP_DUMB command. | |
435 | */ | |
436 | ||
a8ad0bd8 | 437 | obj = drm_gem_object_lookup(file_priv, handle); |
1c248b7d ID |
438 | if (!obj) { |
439 | DRM_ERROR("failed to lookup gem object.\n"); | |
91263622 | 440 | return -EINVAL; |
1c248b7d ID |
441 | } |
442 | ||
0de23977 | 443 | *offset = drm_vma_node_offset_addr(&obj->vma_node); |
1c248b7d ID |
444 | DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset); |
445 | ||
91263622 | 446 | drm_gem_object_unreference_unlocked(obj); |
2d91cf17 | 447 | return ret; |
1c248b7d ID |
448 | } |
449 | ||
11bac800 | 450 | int exynos_drm_gem_fault(struct vm_fault *vmf) |
1c248b7d | 451 | { |
11bac800 | 452 | struct vm_area_struct *vma = vmf->vma; |
1c248b7d | 453 | struct drm_gem_object *obj = vma->vm_private_data; |
813fd67b | 454 | struct exynos_drm_gem *exynos_gem = to_exynos_gem(obj); |
0e9a2ee3 | 455 | unsigned long pfn; |
1c248b7d ID |
456 | pgoff_t page_offset; |
457 | int ret; | |
458 | ||
1a29d85e | 459 | page_offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
1c248b7d | 460 | |
813fd67b | 461 | if (page_offset >= (exynos_gem->size >> PAGE_SHIFT)) { |
0e9a2ee3 JS |
462 | DRM_ERROR("invalid page offset\n"); |
463 | ret = -EINVAL; | |
464 | goto out; | |
465 | } | |
1c248b7d | 466 | |
813fd67b | 467 | pfn = page_to_pfn(exynos_gem->pages[page_offset]); |
1a29d85e | 468 | ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); |
0e9a2ee3 JS |
469 | |
470 | out: | |
23597e26 JS |
471 | switch (ret) { |
472 | case 0: | |
473 | case -ERESTARTSYS: | |
474 | case -EINTR: | |
475 | return VM_FAULT_NOPAGE; | |
476 | case -ENOMEM: | |
477 | return VM_FAULT_OOM; | |
478 | default: | |
479 | return VM_FAULT_SIGBUS; | |
480 | } | |
1c248b7d ID |
481 | } |
482 | ||
5a0202f7 JS |
483 | static int exynos_drm_gem_mmap_obj(struct drm_gem_object *obj, |
484 | struct vm_area_struct *vma) | |
1c248b7d | 485 | { |
5a0202f7 | 486 | struct exynos_drm_gem *exynos_gem = to_exynos_gem(obj); |
1c248b7d ID |
487 | int ret; |
488 | ||
813fd67b | 489 | DRM_DEBUG_KMS("flags = 0x%x\n", exynos_gem->flags); |
211b8878 JS |
490 | |
491 | /* non-cachable as default. */ | |
813fd67b | 492 | if (exynos_gem->flags & EXYNOS_BO_CACHABLE) |
211b8878 | 493 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
813fd67b | 494 | else if (exynos_gem->flags & EXYNOS_BO_WC) |
211b8878 JS |
495 | vma->vm_page_prot = |
496 | pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
497 | else | |
498 | vma->vm_page_prot = | |
499 | pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
c01d73fa | 500 | |
813fd67b | 501 | ret = exynos_drm_gem_mmap_buffer(exynos_gem, vma); |
832316c7 ID |
502 | if (ret) |
503 | goto err_close_vm; | |
504 | ||
505 | return ret; | |
506 | ||
507 | err_close_vm: | |
508 | drm_gem_vm_close(vma); | |
832316c7 | 509 | |
1c248b7d ID |
510 | return ret; |
511 | } | |
01ed50dd | 512 | |
5a0202f7 JS |
513 | int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) |
514 | { | |
515 | struct drm_gem_object *obj; | |
516 | int ret; | |
517 | ||
518 | /* set vm_area_struct. */ | |
519 | ret = drm_gem_mmap(filp, vma); | |
520 | if (ret < 0) { | |
521 | DRM_ERROR("failed to mmap.\n"); | |
522 | return ret; | |
523 | } | |
524 | ||
525 | obj = vma->vm_private_data; | |
526 | ||
55b19fc7 JS |
527 | if (obj->import_attach) |
528 | return dma_buf_mmap(obj->dma_buf, vma, 0); | |
529 | ||
5a0202f7 JS |
530 | return exynos_drm_gem_mmap_obj(obj, vma); |
531 | } | |
532 | ||
01ed50dd JS |
533 | /* low-level interface prime helpers */ |
534 | struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj) | |
535 | { | |
813fd67b | 536 | struct exynos_drm_gem *exynos_gem = to_exynos_gem(obj); |
01ed50dd JS |
537 | int npages; |
538 | ||
813fd67b | 539 | npages = exynos_gem->size >> PAGE_SHIFT; |
01ed50dd | 540 | |
813fd67b | 541 | return drm_prime_pages_to_sg(exynos_gem->pages, npages); |
01ed50dd JS |
542 | } |
543 | ||
544 | struct drm_gem_object * | |
545 | exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, | |
546 | struct dma_buf_attachment *attach, | |
547 | struct sg_table *sgt) | |
548 | { | |
813fd67b | 549 | struct exynos_drm_gem *exynos_gem; |
01ed50dd JS |
550 | int npages; |
551 | int ret; | |
552 | ||
813fd67b JS |
553 | exynos_gem = exynos_drm_gem_init(dev, attach->dmabuf->size); |
554 | if (IS_ERR(exynos_gem)) { | |
555 | ret = PTR_ERR(exynos_gem); | |
50002d4c | 556 | return ERR_PTR(ret); |
2a8cb489 | 557 | } |
01ed50dd | 558 | |
813fd67b | 559 | exynos_gem->dma_addr = sg_dma_address(sgt->sgl); |
01ed50dd | 560 | |
813fd67b JS |
561 | npages = exynos_gem->size >> PAGE_SHIFT; |
562 | exynos_gem->pages = drm_malloc_ab(npages, sizeof(struct page *)); | |
563 | if (!exynos_gem->pages) { | |
01ed50dd JS |
564 | ret = -ENOMEM; |
565 | goto err; | |
566 | } | |
567 | ||
813fd67b JS |
568 | ret = drm_prime_sg_to_page_addr_arrays(sgt, exynos_gem->pages, NULL, |
569 | npages); | |
01ed50dd JS |
570 | if (ret < 0) |
571 | goto err_free_large; | |
572 | ||
813fd67b | 573 | exynos_gem->sgt = sgt; |
7c93537a | 574 | |
01ed50dd JS |
575 | if (sgt->nents == 1) { |
576 | /* always physically continuous memory if sgt->nents is 1. */ | |
813fd67b | 577 | exynos_gem->flags |= EXYNOS_BO_CONTIG; |
01ed50dd JS |
578 | } else { |
579 | /* | |
580 | * this case could be CONTIG or NONCONTIG type but for now | |
581 | * sets NONCONTIG. | |
582 | * TODO. we have to find a way that exporter can notify | |
583 | * the type of its own buffer to importer. | |
584 | */ | |
813fd67b | 585 | exynos_gem->flags |= EXYNOS_BO_NONCONTIG; |
01ed50dd JS |
586 | } |
587 | ||
813fd67b | 588 | return &exynos_gem->base; |
01ed50dd JS |
589 | |
590 | err_free_large: | |
813fd67b | 591 | drm_free_large(exynos_gem->pages); |
01ed50dd | 592 | err: |
813fd67b JS |
593 | drm_gem_object_release(&exynos_gem->base); |
594 | kfree(exynos_gem); | |
01ed50dd JS |
595 | return ERR_PTR(ret); |
596 | } | |
597 | ||
598 | void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj) | |
599 | { | |
600 | return NULL; | |
601 | } | |
602 | ||
603 | void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) | |
604 | { | |
605 | /* Nothing to do */ | |
606 | } | |
5a0202f7 JS |
607 | |
608 | int exynos_drm_gem_prime_mmap(struct drm_gem_object *obj, | |
609 | struct vm_area_struct *vma) | |
610 | { | |
611 | int ret; | |
612 | ||
613 | ret = drm_gem_mmap_obj(obj, obj->size, vma); | |
614 | if (ret < 0) | |
615 | return ret; | |
616 | ||
617 | return exynos_drm_gem_mmap_obj(obj, vma); | |
618 | } |