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Commit | Line | Data |
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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 | |
2098105e MH |
62 | exynos_gem->pages = kvmalloc_array(nr_pages, sizeof(struct page *), |
63 | GFP_KERNEL | __GFP_ZERO); | |
df547bf7 MS |
64 | if (!exynos_gem->pages) { |
65 | DRM_ERROR("failed to allocate pages.\n"); | |
66 | return -ENOMEM; | |
333e8e58 | 67 | } |
2a8cb489 | 68 | |
f43c3596 | 69 | exynos_gem->cookie = dma_alloc_attrs(to_dma_dev(dev), exynos_gem->size, |
813fd67b | 70 | &exynos_gem->dma_addr, GFP_KERNEL, |
00085f1e | 71 | exynos_gem->dma_attrs); |
813fd67b | 72 | if (!exynos_gem->cookie) { |
333e8e58 | 73 | DRM_ERROR("failed to allocate buffer.\n"); |
df547bf7 MS |
74 | goto err_free; |
75 | } | |
76 | ||
f43c3596 | 77 | ret = dma_get_sgtable_attrs(to_dma_dev(dev), &sgt, exynos_gem->cookie, |
df547bf7 | 78 | exynos_gem->dma_addr, exynos_gem->size, |
00085f1e | 79 | exynos_gem->dma_attrs); |
df547bf7 MS |
80 | if (ret < 0) { |
81 | DRM_ERROR("failed to get sgtable.\n"); | |
82 | goto err_dma_free; | |
333e8e58 JS |
83 | } |
84 | ||
df547bf7 MS |
85 | if (drm_prime_sg_to_page_addr_arrays(&sgt, exynos_gem->pages, NULL, |
86 | nr_pages)) { | |
87 | DRM_ERROR("invalid sgtable.\n"); | |
88 | ret = -EINVAL; | |
89 | goto err_sgt_free; | |
2a8cb489 JS |
90 | } |
91 | ||
df547bf7 MS |
92 | sg_free_table(&sgt); |
93 | ||
2a8cb489 | 94 | DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n", |
813fd67b | 95 | (unsigned long)exynos_gem->dma_addr, exynos_gem->size); |
2a8cb489 JS |
96 | |
97 | return 0; | |
df547bf7 MS |
98 | |
99 | err_sgt_free: | |
100 | sg_free_table(&sgt); | |
101 | err_dma_free: | |
f43c3596 | 102 | dma_free_attrs(to_dma_dev(dev), exynos_gem->size, exynos_gem->cookie, |
00085f1e | 103 | exynos_gem->dma_addr, exynos_gem->dma_attrs); |
df547bf7 | 104 | err_free: |
2098105e | 105 | kvfree(exynos_gem->pages); |
df547bf7 MS |
106 | |
107 | return ret; | |
2a8cb489 JS |
108 | } |
109 | ||
813fd67b | 110 | static void exynos_drm_free_buf(struct exynos_drm_gem *exynos_gem) |
2a8cb489 | 111 | { |
813fd67b | 112 | struct drm_device *dev = exynos_gem->base.dev; |
2a8cb489 | 113 | |
813fd67b | 114 | if (!exynos_gem->dma_addr) { |
2a8cb489 JS |
115 | DRM_DEBUG_KMS("dma_addr is invalid.\n"); |
116 | return; | |
117 | } | |
118 | ||
119 | DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n", | |
813fd67b | 120 | (unsigned long)exynos_gem->dma_addr, exynos_gem->size); |
2a8cb489 | 121 | |
f43c3596 | 122 | dma_free_attrs(to_dma_dev(dev), exynos_gem->size, exynos_gem->cookie, |
813fd67b | 123 | (dma_addr_t)exynos_gem->dma_addr, |
00085f1e | 124 | exynos_gem->dma_attrs); |
333e8e58 | 125 | |
2098105e | 126 | kvfree(exynos_gem->pages); |
2a8cb489 JS |
127 | } |
128 | ||
2364839a JS |
129 | static int exynos_drm_gem_handle_create(struct drm_gem_object *obj, |
130 | struct drm_file *file_priv, | |
131 | unsigned int *handle) | |
1c248b7d | 132 | { |
1c248b7d ID |
133 | int ret; |
134 | ||
1c248b7d ID |
135 | /* |
136 | * allocate a id of idr table where the obj is registered | |
137 | * and handle has the id what user can see. | |
138 | */ | |
139 | ret = drm_gem_handle_create(file_priv, obj, handle); | |
140 | if (ret) | |
2364839a | 141 | return ret; |
1c248b7d ID |
142 | |
143 | DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle); | |
144 | ||
145 | /* drop reference from allocate - handle holds it now. */ | |
146 | drm_gem_object_unreference_unlocked(obj); | |
147 | ||
2364839a JS |
148 | return 0; |
149 | } | |
150 | ||
813fd67b | 151 | void exynos_drm_gem_destroy(struct exynos_drm_gem *exynos_gem) |
2364839a | 152 | { |
813fd67b | 153 | struct drm_gem_object *obj = &exynos_gem->base; |
2364839a | 154 | |
a8e11d1c | 155 | DRM_DEBUG_KMS("handle count = %d\n", obj->handle_count); |
1c248b7d | 156 | |
c374e731 ID |
157 | /* |
158 | * do not release memory region from exporter. | |
159 | * | |
160 | * the region will be released by exporter | |
161 | * once dmabuf's refcount becomes 0. | |
162 | */ | |
163 | if (obj->import_attach) | |
813fd67b | 164 | drm_prime_gem_destroy(obj, exynos_gem->sgt); |
7c93537a | 165 | else |
813fd67b | 166 | exynos_drm_free_buf(exynos_gem); |
2b35892e | 167 | |
2364839a | 168 | /* release file pointer to gem object. */ |
1c248b7d ID |
169 | drm_gem_object_release(obj); |
170 | ||
813fd67b | 171 | kfree(exynos_gem); |
2364839a JS |
172 | } |
173 | ||
a4f19aaa ID |
174 | unsigned long exynos_drm_gem_get_size(struct drm_device *dev, |
175 | unsigned int gem_handle, | |
176 | struct drm_file *file_priv) | |
177 | { | |
813fd67b | 178 | struct exynos_drm_gem *exynos_gem; |
a4f19aaa ID |
179 | struct drm_gem_object *obj; |
180 | ||
a8ad0bd8 | 181 | obj = drm_gem_object_lookup(file_priv, gem_handle); |
a4f19aaa ID |
182 | if (!obj) { |
183 | DRM_ERROR("failed to lookup gem object.\n"); | |
184 | return 0; | |
185 | } | |
186 | ||
813fd67b | 187 | exynos_gem = to_exynos_gem(obj); |
a4f19aaa ID |
188 | |
189 | drm_gem_object_unreference_unlocked(obj); | |
190 | ||
813fd67b | 191 | return exynos_gem->size; |
a4f19aaa ID |
192 | } |
193 | ||
813fd67b JS |
194 | static struct exynos_drm_gem *exynos_drm_gem_init(struct drm_device *dev, |
195 | unsigned long size) | |
2364839a | 196 | { |
813fd67b | 197 | struct exynos_drm_gem *exynos_gem; |
2364839a JS |
198 | struct drm_gem_object *obj; |
199 | int ret; | |
200 | ||
813fd67b JS |
201 | exynos_gem = kzalloc(sizeof(*exynos_gem), GFP_KERNEL); |
202 | if (!exynos_gem) | |
5f3f4266 | 203 | return ERR_PTR(-ENOMEM); |
2364839a | 204 | |
813fd67b JS |
205 | exynos_gem->size = size; |
206 | obj = &exynos_gem->base; | |
2364839a JS |
207 | |
208 | ret = drm_gem_object_init(dev, obj, size); | |
209 | if (ret < 0) { | |
210 | DRM_ERROR("failed to initialize gem object\n"); | |
813fd67b | 211 | kfree(exynos_gem); |
5f3f4266 | 212 | return ERR_PTR(ret); |
2364839a JS |
213 | } |
214 | ||
48cf53f4 JS |
215 | ret = drm_gem_create_mmap_offset(obj); |
216 | if (ret < 0) { | |
217 | drm_gem_object_release(obj); | |
813fd67b | 218 | kfree(exynos_gem); |
48cf53f4 JS |
219 | return ERR_PTR(ret); |
220 | } | |
221 | ||
9cdf0ed2 | 222 | DRM_DEBUG_KMS("created file object = %pK\n", obj->filp); |
2364839a | 223 | |
813fd67b | 224 | return exynos_gem; |
1c248b7d ID |
225 | } |
226 | ||
813fd67b JS |
227 | struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev, |
228 | unsigned int flags, | |
229 | unsigned long size) | |
f088d5a9 | 230 | { |
813fd67b | 231 | struct exynos_drm_gem *exynos_gem; |
2b35892e | 232 | int ret; |
f088d5a9 | 233 | |
c4130bcd | 234 | if (flags & ~(EXYNOS_BO_MASK)) { |
63eb0a12 | 235 | DRM_ERROR("invalid GEM buffer flags: %u\n", flags); |
c4130bcd JS |
236 | return ERR_PTR(-EINVAL); |
237 | } | |
238 | ||
dcf9af82 | 239 | if (!size) { |
63eb0a12 | 240 | DRM_ERROR("invalid GEM buffer size: %lu\n", size); |
dcf9af82 ID |
241 | return ERR_PTR(-EINVAL); |
242 | } | |
243 | ||
eb57da88 | 244 | size = roundup(size, PAGE_SIZE); |
f088d5a9 | 245 | |
813fd67b JS |
246 | exynos_gem = exynos_drm_gem_init(dev, size); |
247 | if (IS_ERR(exynos_gem)) | |
248 | return exynos_gem; | |
2b35892e | 249 | |
120a264f MS |
250 | if (!is_drm_iommu_supported(dev) && (flags & EXYNOS_BO_NONCONTIG)) { |
251 | /* | |
252 | * when no IOMMU is available, all allocated buffers are | |
253 | * contiguous anyway, so drop EXYNOS_BO_NONCONTIG flag | |
254 | */ | |
255 | flags &= ~EXYNOS_BO_NONCONTIG; | |
256 | DRM_WARN("Non-contiguous allocation is not supported without IOMMU, falling back to contiguous buffer\n"); | |
257 | } | |
258 | ||
2b35892e | 259 | /* set memory type and cache attribute from user side. */ |
813fd67b | 260 | exynos_gem->flags = flags; |
2b35892e | 261 | |
813fd67b | 262 | ret = exynos_drm_alloc_buf(exynos_gem); |
2a8cb489 | 263 | if (ret < 0) { |
813fd67b JS |
264 | drm_gem_object_release(&exynos_gem->base); |
265 | kfree(exynos_gem); | |
2a8cb489 JS |
266 | return ERR_PTR(ret); |
267 | } | |
f088d5a9 | 268 | |
813fd67b | 269 | return exynos_gem; |
f088d5a9 ID |
270 | } |
271 | ||
1c248b7d | 272 | int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, |
ee5e770e | 273 | struct drm_file *file_priv) |
1c248b7d ID |
274 | { |
275 | struct drm_exynos_gem_create *args = data; | |
813fd67b | 276 | struct exynos_drm_gem *exynos_gem; |
2364839a | 277 | int ret; |
1c248b7d | 278 | |
813fd67b JS |
279 | exynos_gem = exynos_drm_gem_create(dev, args->flags, args->size); |
280 | if (IS_ERR(exynos_gem)) | |
281 | return PTR_ERR(exynos_gem); | |
1c248b7d | 282 | |
813fd67b JS |
283 | ret = exynos_drm_gem_handle_create(&exynos_gem->base, file_priv, |
284 | &args->handle); | |
2364839a | 285 | if (ret) { |
813fd67b | 286 | exynos_drm_gem_destroy(exynos_gem); |
2364839a JS |
287 | return ret; |
288 | } | |
289 | ||
1c248b7d ID |
290 | return 0; |
291 | } | |
292 | ||
6564c65f JS |
293 | int exynos_drm_gem_map_ioctl(struct drm_device *dev, void *data, |
294 | struct drm_file *file_priv) | |
295 | { | |
296 | struct drm_exynos_gem_map *args = data; | |
297 | ||
4d12c233 NT |
298 | return drm_gem_dumb_map_offset(file_priv, dev, args->handle, |
299 | &args->offset); | |
6564c65f JS |
300 | } |
301 | ||
d87342c1 | 302 | dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, |
f0b1bda7 | 303 | unsigned int gem_handle, |
d87342c1 | 304 | struct drm_file *filp) |
f0b1bda7 | 305 | { |
813fd67b | 306 | struct exynos_drm_gem *exynos_gem; |
f0b1bda7 ID |
307 | struct drm_gem_object *obj; |
308 | ||
a8ad0bd8 | 309 | obj = drm_gem_object_lookup(filp, gem_handle); |
f0b1bda7 ID |
310 | if (!obj) { |
311 | DRM_ERROR("failed to lookup gem object.\n"); | |
312 | return ERR_PTR(-EINVAL); | |
313 | } | |
314 | ||
813fd67b | 315 | exynos_gem = to_exynos_gem(obj); |
f0b1bda7 | 316 | |
813fd67b | 317 | return &exynos_gem->dma_addr; |
f0b1bda7 ID |
318 | } |
319 | ||
320 | void exynos_drm_gem_put_dma_addr(struct drm_device *dev, | |
321 | unsigned int gem_handle, | |
d87342c1 | 322 | struct drm_file *filp) |
f0b1bda7 | 323 | { |
f0b1bda7 ID |
324 | struct drm_gem_object *obj; |
325 | ||
a8ad0bd8 | 326 | obj = drm_gem_object_lookup(filp, gem_handle); |
f0b1bda7 ID |
327 | if (!obj) { |
328 | DRM_ERROR("failed to lookup gem object.\n"); | |
329 | return; | |
330 | } | |
331 | ||
f0b1bda7 ID |
332 | drm_gem_object_unreference_unlocked(obj); |
333 | ||
334 | /* | |
335 | * decrease obj->refcount one more time because we has already | |
336 | * increased it at exynos_drm_gem_get_dma_addr(). | |
337 | */ | |
338 | drm_gem_object_unreference_unlocked(obj); | |
339 | } | |
340 | ||
813fd67b | 341 | static int exynos_drm_gem_mmap_buffer(struct exynos_drm_gem *exynos_gem, |
ee5e770e | 342 | struct vm_area_struct *vma) |
1c248b7d | 343 | { |
813fd67b | 344 | struct drm_device *drm_dev = exynos_gem->base.dev; |
0519f9a1 | 345 | unsigned long vm_size; |
5b07c660 | 346 | int ret; |
1c248b7d | 347 | |
832316c7 ID |
348 | vma->vm_flags &= ~VM_PFNMAP; |
349 | vma->vm_pgoff = 0; | |
1c248b7d | 350 | |
0519f9a1 | 351 | vm_size = vma->vm_end - vma->vm_start; |
2b35892e | 352 | |
1c248b7d | 353 | /* check if user-requested size is valid. */ |
813fd67b | 354 | if (vm_size > exynos_gem->size) |
1c248b7d ID |
355 | return -EINVAL; |
356 | ||
f43c3596 | 357 | ret = dma_mmap_attrs(to_dma_dev(drm_dev), vma, exynos_gem->cookie, |
813fd67b | 358 | exynos_gem->dma_addr, exynos_gem->size, |
00085f1e | 359 | exynos_gem->dma_attrs); |
5b07c660 ID |
360 | if (ret < 0) { |
361 | DRM_ERROR("failed to mmap.\n"); | |
362 | return ret; | |
363 | } | |
364 | ||
1c248b7d ID |
365 | return 0; |
366 | } | |
367 | ||
40cd7e0c ID |
368 | int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, |
369 | struct drm_file *file_priv) | |
b4cfd4dd | 370 | { |
813fd67b | 371 | struct exynos_drm_gem *exynos_gem; |
40cd7e0c ID |
372 | struct drm_exynos_gem_info *args = data; |
373 | struct drm_gem_object *obj; | |
374 | ||
a8ad0bd8 | 375 | obj = drm_gem_object_lookup(file_priv, args->handle); |
40cd7e0c ID |
376 | if (!obj) { |
377 | DRM_ERROR("failed to lookup gem object.\n"); | |
40cd7e0c ID |
378 | return -EINVAL; |
379 | } | |
380 | ||
813fd67b | 381 | exynos_gem = to_exynos_gem(obj); |
40cd7e0c | 382 | |
813fd67b JS |
383 | args->flags = exynos_gem->flags; |
384 | args->size = exynos_gem->size; | |
40cd7e0c | 385 | |
6c991a22 | 386 | drm_gem_object_unreference_unlocked(obj); |
40cd7e0c ID |
387 | |
388 | return 0; | |
389 | } | |
390 | ||
ee5e770e | 391 | void exynos_drm_gem_free_object(struct drm_gem_object *obj) |
1c248b7d | 392 | { |
813fd67b | 393 | exynos_drm_gem_destroy(to_exynos_gem(obj)); |
1c248b7d ID |
394 | } |
395 | ||
396 | int exynos_drm_gem_dumb_create(struct drm_file *file_priv, | |
ee5e770e JS |
397 | struct drm_device *dev, |
398 | struct drm_mode_create_dumb *args) | |
1c248b7d | 399 | { |
813fd67b | 400 | struct exynos_drm_gem *exynos_gem; |
333e8e58 | 401 | unsigned int flags; |
2364839a | 402 | int ret; |
1c248b7d | 403 | |
1c248b7d | 404 | /* |
c6b78bc8 | 405 | * allocate memory to be used for framebuffer. |
1c248b7d ID |
406 | * - this callback would be called by user application |
407 | * with DRM_IOCTL_MODE_CREATE_DUMB command. | |
408 | */ | |
409 | ||
3fd6b694 | 410 | args->pitch = args->width * ((args->bpp + 7) / 8); |
7da5907c | 411 | args->size = args->pitch * args->height; |
1c248b7d | 412 | |
333e8e58 JS |
413 | if (is_drm_iommu_supported(dev)) |
414 | flags = EXYNOS_BO_NONCONTIG | EXYNOS_BO_WC; | |
415 | else | |
416 | flags = EXYNOS_BO_CONTIG | EXYNOS_BO_WC; | |
3fec4532 | 417 | |
813fd67b JS |
418 | exynos_gem = exynos_drm_gem_create(dev, flags, args->size); |
419 | if (IS_ERR(exynos_gem)) { | |
122beea8 | 420 | dev_warn(dev->dev, "FB allocation failed.\n"); |
813fd67b | 421 | return PTR_ERR(exynos_gem); |
122beea8 | 422 | } |
1c248b7d | 423 | |
813fd67b JS |
424 | ret = exynos_drm_gem_handle_create(&exynos_gem->base, file_priv, |
425 | &args->handle); | |
2364839a | 426 | if (ret) { |
813fd67b | 427 | exynos_drm_gem_destroy(exynos_gem); |
2364839a JS |
428 | return ret; |
429 | } | |
430 | ||
1c248b7d ID |
431 | return 0; |
432 | } | |
433 | ||
11bac800 | 434 | int exynos_drm_gem_fault(struct vm_fault *vmf) |
1c248b7d | 435 | { |
11bac800 | 436 | struct vm_area_struct *vma = vmf->vma; |
1c248b7d | 437 | struct drm_gem_object *obj = vma->vm_private_data; |
813fd67b | 438 | struct exynos_drm_gem *exynos_gem = to_exynos_gem(obj); |
0e9a2ee3 | 439 | unsigned long pfn; |
1c248b7d ID |
440 | pgoff_t page_offset; |
441 | int ret; | |
442 | ||
1a29d85e | 443 | page_offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
1c248b7d | 444 | |
813fd67b | 445 | if (page_offset >= (exynos_gem->size >> PAGE_SHIFT)) { |
0e9a2ee3 JS |
446 | DRM_ERROR("invalid page offset\n"); |
447 | ret = -EINVAL; | |
448 | goto out; | |
449 | } | |
1c248b7d | 450 | |
813fd67b | 451 | pfn = page_to_pfn(exynos_gem->pages[page_offset]); |
1a29d85e | 452 | ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); |
0e9a2ee3 JS |
453 | |
454 | out: | |
23597e26 JS |
455 | switch (ret) { |
456 | case 0: | |
457 | case -ERESTARTSYS: | |
458 | case -EINTR: | |
459 | return VM_FAULT_NOPAGE; | |
460 | case -ENOMEM: | |
461 | return VM_FAULT_OOM; | |
462 | default: | |
463 | return VM_FAULT_SIGBUS; | |
464 | } | |
1c248b7d ID |
465 | } |
466 | ||
5a0202f7 JS |
467 | static int exynos_drm_gem_mmap_obj(struct drm_gem_object *obj, |
468 | struct vm_area_struct *vma) | |
1c248b7d | 469 | { |
5a0202f7 | 470 | struct exynos_drm_gem *exynos_gem = to_exynos_gem(obj); |
1c248b7d ID |
471 | int ret; |
472 | ||
813fd67b | 473 | DRM_DEBUG_KMS("flags = 0x%x\n", exynos_gem->flags); |
211b8878 JS |
474 | |
475 | /* non-cachable as default. */ | |
813fd67b | 476 | if (exynos_gem->flags & EXYNOS_BO_CACHABLE) |
211b8878 | 477 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
813fd67b | 478 | else if (exynos_gem->flags & EXYNOS_BO_WC) |
211b8878 JS |
479 | vma->vm_page_prot = |
480 | pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
481 | else | |
482 | vma->vm_page_prot = | |
483 | pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
c01d73fa | 484 | |
813fd67b | 485 | ret = exynos_drm_gem_mmap_buffer(exynos_gem, vma); |
832316c7 ID |
486 | if (ret) |
487 | goto err_close_vm; | |
488 | ||
489 | return ret; | |
490 | ||
491 | err_close_vm: | |
492 | drm_gem_vm_close(vma); | |
832316c7 | 493 | |
1c248b7d ID |
494 | return ret; |
495 | } | |
01ed50dd | 496 | |
5a0202f7 JS |
497 | int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) |
498 | { | |
499 | struct drm_gem_object *obj; | |
500 | int ret; | |
501 | ||
502 | /* set vm_area_struct. */ | |
503 | ret = drm_gem_mmap(filp, vma); | |
504 | if (ret < 0) { | |
505 | DRM_ERROR("failed to mmap.\n"); | |
506 | return ret; | |
507 | } | |
508 | ||
509 | obj = vma->vm_private_data; | |
510 | ||
55b19fc7 JS |
511 | if (obj->import_attach) |
512 | return dma_buf_mmap(obj->dma_buf, vma, 0); | |
513 | ||
5a0202f7 JS |
514 | return exynos_drm_gem_mmap_obj(obj, vma); |
515 | } | |
516 | ||
01ed50dd | 517 | /* low-level interface prime helpers */ |
89452d4a MS |
518 | struct drm_gem_object *exynos_drm_gem_prime_import(struct drm_device *dev, |
519 | struct dma_buf *dma_buf) | |
520 | { | |
521 | return drm_gem_prime_import_dev(dev, dma_buf, to_dma_dev(dev)); | |
522 | } | |
523 | ||
01ed50dd JS |
524 | struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj) |
525 | { | |
813fd67b | 526 | struct exynos_drm_gem *exynos_gem = to_exynos_gem(obj); |
01ed50dd JS |
527 | int npages; |
528 | ||
813fd67b | 529 | npages = exynos_gem->size >> PAGE_SHIFT; |
01ed50dd | 530 | |
813fd67b | 531 | return drm_prime_pages_to_sg(exynos_gem->pages, npages); |
01ed50dd JS |
532 | } |
533 | ||
534 | struct drm_gem_object * | |
535 | exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, | |
536 | struct dma_buf_attachment *attach, | |
537 | struct sg_table *sgt) | |
538 | { | |
813fd67b | 539 | struct exynos_drm_gem *exynos_gem; |
01ed50dd JS |
540 | int npages; |
541 | int ret; | |
542 | ||
813fd67b JS |
543 | exynos_gem = exynos_drm_gem_init(dev, attach->dmabuf->size); |
544 | if (IS_ERR(exynos_gem)) { | |
545 | ret = PTR_ERR(exynos_gem); | |
50002d4c | 546 | return ERR_PTR(ret); |
2a8cb489 | 547 | } |
01ed50dd | 548 | |
813fd67b | 549 | exynos_gem->dma_addr = sg_dma_address(sgt->sgl); |
01ed50dd | 550 | |
813fd67b | 551 | npages = exynos_gem->size >> PAGE_SHIFT; |
2098105e | 552 | exynos_gem->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); |
813fd67b | 553 | if (!exynos_gem->pages) { |
01ed50dd JS |
554 | ret = -ENOMEM; |
555 | goto err; | |
556 | } | |
557 | ||
813fd67b JS |
558 | ret = drm_prime_sg_to_page_addr_arrays(sgt, exynos_gem->pages, NULL, |
559 | npages); | |
01ed50dd JS |
560 | if (ret < 0) |
561 | goto err_free_large; | |
562 | ||
813fd67b | 563 | exynos_gem->sgt = sgt; |
7c93537a | 564 | |
01ed50dd JS |
565 | if (sgt->nents == 1) { |
566 | /* always physically continuous memory if sgt->nents is 1. */ | |
813fd67b | 567 | exynos_gem->flags |= EXYNOS_BO_CONTIG; |
01ed50dd JS |
568 | } else { |
569 | /* | |
570 | * this case could be CONTIG or NONCONTIG type but for now | |
571 | * sets NONCONTIG. | |
572 | * TODO. we have to find a way that exporter can notify | |
573 | * the type of its own buffer to importer. | |
574 | */ | |
813fd67b | 575 | exynos_gem->flags |= EXYNOS_BO_NONCONTIG; |
01ed50dd JS |
576 | } |
577 | ||
813fd67b | 578 | return &exynos_gem->base; |
01ed50dd JS |
579 | |
580 | err_free_large: | |
2098105e | 581 | kvfree(exynos_gem->pages); |
01ed50dd | 582 | err: |
813fd67b JS |
583 | drm_gem_object_release(&exynos_gem->base); |
584 | kfree(exynos_gem); | |
01ed50dd JS |
585 | return ERR_PTR(ret); |
586 | } | |
587 | ||
588 | void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj) | |
589 | { | |
590 | return NULL; | |
591 | } | |
592 | ||
593 | void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) | |
594 | { | |
595 | /* Nothing to do */ | |
596 | } | |
5a0202f7 JS |
597 | |
598 | int exynos_drm_gem_prime_mmap(struct drm_gem_object *obj, | |
599 | struct vm_area_struct *vma) | |
600 | { | |
601 | int ret; | |
602 | ||
603 | ret = drm_gem_mmap_obj(obj, obj->size, vma); | |
604 | if (ret < 0) | |
605 | return ret; | |
606 | ||
607 | return exynos_drm_gem_mmap_obj(obj, vma); | |
608 | } |