Commit | Line | Data |
---|---|---|
1286ff73 DV |
1 | /* |
2 | * Copyright 2012 Red Hat Inc | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
21 | * DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Dave Airlie <airlied@redhat.com> | |
25 | */ | |
760285e7 | 26 | #include <drm/drmP.h> |
1286ff73 DV |
27 | #include "i915_drv.h" |
28 | #include <linux/dma-buf.h> | |
29 | ||
608806a5 DV |
30 | static struct drm_i915_gem_object *dma_buf_to_obj(struct dma_buf *buf) |
31 | { | |
32 | return to_intel_bo(buf->priv); | |
33 | } | |
34 | ||
6a101cb2 | 35 | static struct sg_table *i915_gem_map_dma_buf(struct dma_buf_attachment *attachment, |
9da3da66 | 36 | enum dma_data_direction dir) |
1286ff73 | 37 | { |
608806a5 | 38 | struct drm_i915_gem_object *obj = dma_buf_to_obj(attachment->dmabuf); |
9da3da66 CW |
39 | struct sg_table *st; |
40 | struct scatterlist *src, *dst; | |
41 | int ret, i; | |
1286ff73 | 42 | |
9da3da66 | 43 | ret = i915_mutex_lock_interruptible(obj->base.dev); |
1286ff73 | 44 | if (ret) |
5cfacded | 45 | goto err; |
1286ff73 | 46 | |
37e680a1 | 47 | ret = i915_gem_object_get_pages(obj); |
5cfacded CW |
48 | if (ret) |
49 | goto err_unlock; | |
50 | ||
51 | i915_gem_object_pin_pages(obj); | |
9da3da66 CW |
52 | |
53 | /* Copy sg so that we make an independent mapping */ | |
54 | st = kmalloc(sizeof(struct sg_table), GFP_KERNEL); | |
55 | if (st == NULL) { | |
5cfacded CW |
56 | ret = -ENOMEM; |
57 | goto err_unpin; | |
1286ff73 DV |
58 | } |
59 | ||
9da3da66 | 60 | ret = sg_alloc_table(st, obj->pages->nents, GFP_KERNEL); |
5cfacded CW |
61 | if (ret) |
62 | goto err_free; | |
9da3da66 CW |
63 | |
64 | src = obj->pages->sgl; | |
65 | dst = st->sgl; | |
66 | for (i = 0; i < obj->pages->nents; i++) { | |
67d5a50c | 67 | sg_set_page(dst, sg_page(src), src->length, 0); |
9da3da66 CW |
68 | dst = sg_next(dst); |
69 | src = sg_next(src); | |
70 | } | |
71 | ||
72 | if (!dma_map_sg(attachment->dev, st->sgl, st->nents, dir)) { | |
5cfacded CW |
73 | ret =-ENOMEM; |
74 | goto err_free_sg; | |
1286ff73 DV |
75 | } |
76 | ||
9da3da66 CW |
77 | mutex_unlock(&obj->base.dev->struct_mutex); |
78 | return st; | |
5cfacded CW |
79 | |
80 | err_free_sg: | |
81 | sg_free_table(st); | |
82 | err_free: | |
83 | kfree(st); | |
84 | err_unpin: | |
85 | i915_gem_object_unpin_pages(obj); | |
86 | err_unlock: | |
87 | mutex_unlock(&obj->base.dev->struct_mutex); | |
88 | err: | |
89 | return ERR_PTR(ret); | |
1286ff73 DV |
90 | } |
91 | ||
6a101cb2 | 92 | static void i915_gem_unmap_dma_buf(struct dma_buf_attachment *attachment, |
2f745ad3 CW |
93 | struct sg_table *sg, |
94 | enum dma_data_direction dir) | |
1286ff73 | 95 | { |
608806a5 | 96 | struct drm_i915_gem_object *obj = dma_buf_to_obj(attachment->dmabuf); |
f214266c | 97 | |
1286ff73 DV |
98 | dma_unmap_sg(attachment->dev, sg->sgl, sg->nents, dir); |
99 | sg_free_table(sg); | |
100 | kfree(sg); | |
f214266c | 101 | |
6d19245f | 102 | mutex_lock(&obj->base.dev->struct_mutex); |
f214266c | 103 | i915_gem_object_unpin_pages(obj); |
f214266c | 104 | mutex_unlock(&obj->base.dev->struct_mutex); |
1286ff73 DV |
105 | } |
106 | ||
9a70cc2a DA |
107 | static void *i915_gem_dmabuf_vmap(struct dma_buf *dma_buf) |
108 | { | |
608806a5 | 109 | struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf); |
9a70cc2a | 110 | struct drm_device *dev = obj->base.dev; |
0a798eb9 CW |
111 | void *addr; |
112 | int ret; | |
9a70cc2a DA |
113 | |
114 | ret = i915_mutex_lock_interruptible(dev); | |
115 | if (ret) | |
116 | return ERR_PTR(ret); | |
117 | ||
0a798eb9 | 118 | addr = i915_gem_object_pin_map(obj); |
9a70cc2a | 119 | mutex_unlock(&dev->struct_mutex); |
9da3da66 | 120 | |
0a798eb9 | 121 | return addr; |
9a70cc2a DA |
122 | } |
123 | ||
124 | static void i915_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr) | |
125 | { | |
608806a5 | 126 | struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf); |
9a70cc2a | 127 | struct drm_device *dev = obj->base.dev; |
9a70cc2a | 128 | |
ce7ec768 | 129 | mutex_lock(&dev->struct_mutex); |
0a798eb9 | 130 | i915_gem_object_unpin_map(obj); |
9a70cc2a DA |
131 | mutex_unlock(&dev->struct_mutex); |
132 | } | |
133 | ||
1286ff73 DV |
134 | static void *i915_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf, unsigned long page_num) |
135 | { | |
136 | return NULL; | |
137 | } | |
138 | ||
139 | static void i915_gem_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, unsigned long page_num, void *addr) | |
140 | { | |
141 | ||
142 | } | |
143 | static void *i915_gem_dmabuf_kmap(struct dma_buf *dma_buf, unsigned long page_num) | |
144 | { | |
145 | return NULL; | |
146 | } | |
147 | ||
148 | static void i915_gem_dmabuf_kunmap(struct dma_buf *dma_buf, unsigned long page_num, void *addr) | |
149 | { | |
150 | ||
151 | } | |
152 | ||
2dad9d4d DA |
153 | static int i915_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma) |
154 | { | |
2dbf0d90 TV |
155 | struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf); |
156 | int ret; | |
157 | ||
158 | if (obj->base.size < vma->vm_end - vma->vm_start) | |
159 | return -EINVAL; | |
160 | ||
161 | if (!obj->base.filp) | |
162 | return -ENODEV; | |
163 | ||
164 | ret = obj->base.filp->f_op->mmap(obj->base.filp, vma); | |
165 | if (ret) | |
166 | return ret; | |
167 | ||
168 | fput(vma->vm_file); | |
169 | vma->vm_file = get_file(obj->base.filp); | |
170 | ||
171 | return 0; | |
2dad9d4d DA |
172 | } |
173 | ||
831e9da7 | 174 | static int i915_gem_begin_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction direction) |
ec6f1bb9 | 175 | { |
608806a5 | 176 | struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf); |
ec6f1bb9 DA |
177 | struct drm_device *dev = obj->base.dev; |
178 | int ret; | |
179 | bool write = (direction == DMA_BIDIRECTIONAL || direction == DMA_TO_DEVICE); | |
180 | ||
181 | ret = i915_mutex_lock_interruptible(dev); | |
182 | if (ret) | |
183 | return ret; | |
184 | ||
185 | ret = i915_gem_object_set_to_cpu_domain(obj, write); | |
186 | mutex_unlock(&dev->struct_mutex); | |
187 | return ret; | |
188 | } | |
189 | ||
18b862dc | 190 | static int i915_gem_end_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction direction) |
346400c8 TV |
191 | { |
192 | struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf); | |
193 | struct drm_device *dev = obj->base.dev; | |
346400c8 TV |
194 | int ret; |
195 | ||
18b862dc CW |
196 | ret = i915_mutex_lock_interruptible(dev); |
197 | if (ret) | |
198 | return ret; | |
346400c8 TV |
199 | |
200 | ret = i915_gem_object_set_to_gtt_domain(obj, false); | |
346400c8 TV |
201 | mutex_unlock(&dev->struct_mutex); |
202 | ||
18b862dc | 203 | return ret; |
346400c8 TV |
204 | } |
205 | ||
6a101cb2 | 206 | static const struct dma_buf_ops i915_dmabuf_ops = { |
1286ff73 DV |
207 | .map_dma_buf = i915_gem_map_dma_buf, |
208 | .unmap_dma_buf = i915_gem_unmap_dma_buf, | |
c1d6798d | 209 | .release = drm_gem_dmabuf_release, |
1286ff73 DV |
210 | .kmap = i915_gem_dmabuf_kmap, |
211 | .kmap_atomic = i915_gem_dmabuf_kmap_atomic, | |
212 | .kunmap = i915_gem_dmabuf_kunmap, | |
213 | .kunmap_atomic = i915_gem_dmabuf_kunmap_atomic, | |
2dad9d4d | 214 | .mmap = i915_gem_dmabuf_mmap, |
9a70cc2a DA |
215 | .vmap = i915_gem_dmabuf_vmap, |
216 | .vunmap = i915_gem_dmabuf_vunmap, | |
ec6f1bb9 | 217 | .begin_cpu_access = i915_gem_begin_cpu_access, |
346400c8 | 218 | .end_cpu_access = i915_gem_end_cpu_access, |
1286ff73 DV |
219 | }; |
220 | ||
221 | struct dma_buf *i915_gem_prime_export(struct drm_device *dev, | |
9da3da66 | 222 | struct drm_gem_object *gem_obj, int flags) |
1286ff73 | 223 | { |
5cc9ed4b | 224 | struct drm_i915_gem_object *obj = to_intel_bo(gem_obj); |
d8fbe341 SS |
225 | DEFINE_DMA_BUF_EXPORT_INFO(exp_info); |
226 | ||
227 | exp_info.ops = &i915_dmabuf_ops; | |
228 | exp_info.size = gem_obj->size; | |
229 | exp_info.flags = flags; | |
230 | exp_info.priv = gem_obj; | |
231 | ||
5cc9ed4b CW |
232 | |
233 | if (obj->ops->dmabuf_export) { | |
234 | int ret = obj->ops->dmabuf_export(obj); | |
235 | if (ret) | |
236 | return ERR_PTR(ret); | |
237 | } | |
238 | ||
d8fbe341 | 239 | return dma_buf_export(&exp_info); |
1286ff73 DV |
240 | } |
241 | ||
2f745ad3 CW |
242 | static int i915_gem_object_get_pages_dmabuf(struct drm_i915_gem_object *obj) |
243 | { | |
244 | struct sg_table *sg; | |
245 | ||
246 | sg = dma_buf_map_attachment(obj->base.import_attach, DMA_BIDIRECTIONAL); | |
247 | if (IS_ERR(sg)) | |
248 | return PTR_ERR(sg); | |
249 | ||
250 | obj->pages = sg; | |
2f745ad3 | 251 | return 0; |
1286ff73 DV |
252 | } |
253 | ||
2f745ad3 CW |
254 | static void i915_gem_object_put_pages_dmabuf(struct drm_i915_gem_object *obj) |
255 | { | |
256 | dma_buf_unmap_attachment(obj->base.import_attach, | |
257 | obj->pages, DMA_BIDIRECTIONAL); | |
2f745ad3 CW |
258 | } |
259 | ||
260 | static const struct drm_i915_gem_object_ops i915_gem_object_dmabuf_ops = { | |
261 | .get_pages = i915_gem_object_get_pages_dmabuf, | |
262 | .put_pages = i915_gem_object_put_pages_dmabuf, | |
263 | }; | |
264 | ||
1286ff73 | 265 | struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev, |
9da3da66 | 266 | struct dma_buf *dma_buf) |
1286ff73 DV |
267 | { |
268 | struct dma_buf_attachment *attach; | |
1286ff73 | 269 | struct drm_i915_gem_object *obj; |
1286ff73 DV |
270 | int ret; |
271 | ||
272 | /* is this one of own objects? */ | |
273 | if (dma_buf->ops == &i915_dmabuf_ops) { | |
608806a5 | 274 | obj = dma_buf_to_obj(dma_buf); |
1286ff73 DV |
275 | /* is it from our device? */ |
276 | if (obj->base.dev == dev) { | |
be8a42ae SWK |
277 | /* |
278 | * Importing dmabuf exported from out own gem increases | |
279 | * refcount on gem itself instead of f_count of dmabuf. | |
280 | */ | |
1286ff73 DV |
281 | drm_gem_object_reference(&obj->base); |
282 | return &obj->base; | |
283 | } | |
284 | } | |
285 | ||
286 | /* need to attach */ | |
287 | attach = dma_buf_attach(dma_buf, dev->dev); | |
288 | if (IS_ERR(attach)) | |
289 | return ERR_CAST(attach); | |
290 | ||
011c2282 ID |
291 | get_dma_buf(dma_buf); |
292 | ||
42dcedd4 | 293 | obj = i915_gem_object_alloc(dev); |
1286ff73 DV |
294 | if (obj == NULL) { |
295 | ret = -ENOMEM; | |
2f745ad3 | 296 | goto fail_detach; |
1286ff73 DV |
297 | } |
298 | ||
89c8233f | 299 | drm_gem_private_object_init(dev, &obj->base, dma_buf->size); |
2f745ad3 | 300 | i915_gem_object_init(obj, &i915_gem_object_dmabuf_ops); |
1286ff73 DV |
301 | obj->base.import_attach = attach; |
302 | ||
303 | return &obj->base; | |
304 | ||
1286ff73 DV |
305 | fail_detach: |
306 | dma_buf_detach(dma_buf, attach); | |
011c2282 ID |
307 | dma_buf_put(dma_buf); |
308 | ||
1286ff73 DV |
309 | return ERR_PTR(ret); |
310 | } |