1 | /* |
2 | * Copyright (C) 2015 Red Hat, Inc. |
3 | * All Rights Reserved. |
4 | * |
5 | * Permission is hereby granted, free of charge, to any person obtaining |
6 | * a copy of this software and associated documentation files (the |
7 | * "Software"), to deal in the Software without restriction, including |
8 | * without limitation the rights to use, copy, modify, merge, publish, |
9 | * distribute, sublicense, and/or sell copies of the Software, and to |
10 | * permit persons to whom the Software is furnished to do so, subject to |
11 | * the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice (including the |
14 | * next paragraph) shall be included in all copies or substantial |
15 | * portions of the Software. |
16 | * |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
20 | * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE |
21 | * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
22 | * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
23 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
24 | */ |
25 | |
26 | #include <drm/drm_file.h> |
27 | #include <drm/drm_fourcc.h> |
28 | |
29 | #include "virtgpu_drv.h" |
30 | |
31 | static int virtio_gpu_gem_create(struct drm_file *file, |
32 | struct drm_device *dev, |
33 | struct virtio_gpu_object_params *params, |
34 | struct drm_gem_object **obj_p, |
35 | uint32_t *handle_p) |
36 | { |
37 | struct virtio_gpu_device *vgdev = dev->dev_private; |
38 | struct virtio_gpu_object *obj; |
39 | int ret; |
40 | u32 handle; |
41 | |
42 | ret = virtio_gpu_object_create(vgdev, params, bo_ptr: &obj, NULL); |
43 | if (ret < 0) |
44 | return ret; |
45 | |
46 | ret = drm_gem_handle_create(file_priv: file, obj: &obj->base.base, handlep: &handle); |
47 | if (ret) { |
48 | drm_gem_object_release(obj: &obj->base.base); |
49 | return ret; |
50 | } |
51 | |
52 | *obj_p = &obj->base.base; |
53 | |
54 | /* drop reference from allocate - handle holds it now */ |
55 | drm_gem_object_put(obj: &obj->base.base); |
56 | |
57 | *handle_p = handle; |
58 | return 0; |
59 | } |
60 | |
61 | int virtio_gpu_mode_dumb_create(struct drm_file *file_priv, |
62 | struct drm_device *dev, |
63 | struct drm_mode_create_dumb *args) |
64 | { |
65 | struct drm_gem_object *gobj; |
66 | struct virtio_gpu_object_params params = { 0 }; |
67 | struct virtio_gpu_device *vgdev = dev->dev_private; |
68 | int ret; |
69 | uint32_t pitch; |
70 | |
71 | if (args->bpp != 32) |
72 | return -EINVAL; |
73 | |
74 | pitch = args->width * 4; |
75 | args->size = pitch * args->height; |
76 | args->size = ALIGN(args->size, PAGE_SIZE); |
77 | |
78 | params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888); |
79 | params.width = args->width; |
80 | params.height = args->height; |
81 | params.size = args->size; |
82 | params.dumb = true; |
83 | |
84 | if (vgdev->has_resource_blob && !vgdev->has_virgl_3d) { |
85 | params.blob_mem = VIRTGPU_BLOB_MEM_GUEST; |
86 | params.blob_flags = VIRTGPU_BLOB_FLAG_USE_SHAREABLE; |
87 | params.blob = true; |
88 | } |
89 | |
90 | ret = virtio_gpu_gem_create(file: file_priv, dev, params: ¶ms, obj_p: &gobj, |
91 | handle_p: &args->handle); |
92 | if (ret) |
93 | goto fail; |
94 | |
95 | args->pitch = pitch; |
96 | return ret; |
97 | |
98 | fail: |
99 | return ret; |
100 | } |
101 | |
102 | int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv, |
103 | struct drm_device *dev, |
104 | uint32_t handle, uint64_t *offset_p) |
105 | { |
106 | struct drm_gem_object *gobj; |
107 | |
108 | BUG_ON(!offset_p); |
109 | gobj = drm_gem_object_lookup(filp: file_priv, handle); |
110 | if (gobj == NULL) |
111 | return -ENOENT; |
112 | *offset_p = drm_vma_node_offset_addr(node: &gobj->vma_node); |
113 | drm_gem_object_put(obj: gobj); |
114 | return 0; |
115 | } |
116 | |
117 | int virtio_gpu_gem_object_open(struct drm_gem_object *obj, |
118 | struct drm_file *file) |
119 | { |
120 | struct virtio_gpu_device *vgdev = obj->dev->dev_private; |
121 | struct virtio_gpu_fpriv *vfpriv = file->driver_priv; |
122 | struct virtio_gpu_object_array *objs; |
123 | |
124 | if (!vgdev->has_virgl_3d) |
125 | goto out_notify; |
126 | |
127 | /* the context might still be missing when the first ioctl is |
128 | * DRM_IOCTL_MODE_CREATE_DUMB or DRM_IOCTL_PRIME_FD_TO_HANDLE |
129 | */ |
130 | virtio_gpu_create_context(dev: obj->dev, file); |
131 | |
132 | objs = virtio_gpu_array_alloc(nents: 1); |
133 | if (!objs) |
134 | return -ENOMEM; |
135 | virtio_gpu_array_add_obj(objs, obj); |
136 | |
137 | virtio_gpu_cmd_context_attach_resource(vgdev, ctx_id: vfpriv->ctx_id, |
138 | objs); |
139 | out_notify: |
140 | virtio_gpu_notify(vgdev); |
141 | return 0; |
142 | } |
143 | |
144 | void virtio_gpu_gem_object_close(struct drm_gem_object *obj, |
145 | struct drm_file *file) |
146 | { |
147 | struct virtio_gpu_device *vgdev = obj->dev->dev_private; |
148 | struct virtio_gpu_fpriv *vfpriv = file->driver_priv; |
149 | struct virtio_gpu_object_array *objs; |
150 | |
151 | if (!vgdev->has_virgl_3d) |
152 | return; |
153 | |
154 | objs = virtio_gpu_array_alloc(nents: 1); |
155 | if (!objs) |
156 | return; |
157 | virtio_gpu_array_add_obj(objs, obj); |
158 | |
159 | virtio_gpu_cmd_context_detach_resource(vgdev, ctx_id: vfpriv->ctx_id, |
160 | objs); |
161 | virtio_gpu_notify(vgdev); |
162 | } |
163 | |
164 | struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents) |
165 | { |
166 | struct virtio_gpu_object_array *objs; |
167 | |
168 | objs = kmalloc(struct_size(objs, objs, nents), GFP_KERNEL); |
169 | if (!objs) |
170 | return NULL; |
171 | |
172 | objs->nents = 0; |
173 | objs->total = nents; |
174 | return objs; |
175 | } |
176 | |
177 | static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs) |
178 | { |
179 | kfree(objp: objs); |
180 | } |
181 | |
182 | struct virtio_gpu_object_array* |
183 | virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents) |
184 | { |
185 | struct virtio_gpu_object_array *objs; |
186 | u32 i; |
187 | |
188 | objs = virtio_gpu_array_alloc(nents); |
189 | if (!objs) |
190 | return NULL; |
191 | |
192 | for (i = 0; i < nents; i++) { |
193 | objs->objs[i] = drm_gem_object_lookup(filp: drm_file, handle: handles[i]); |
194 | if (!objs->objs[i]) { |
195 | objs->nents = i; |
196 | virtio_gpu_array_put_free(objs); |
197 | return NULL; |
198 | } |
199 | } |
200 | objs->nents = i; |
201 | return objs; |
202 | } |
203 | |
204 | void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs, |
205 | struct drm_gem_object *obj) |
206 | { |
207 | if (WARN_ON_ONCE(objs->nents == objs->total)) |
208 | return; |
209 | |
210 | drm_gem_object_get(obj); |
211 | objs->objs[objs->nents] = obj; |
212 | objs->nents++; |
213 | } |
214 | |
215 | int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs) |
216 | { |
217 | unsigned int i; |
218 | int ret; |
219 | |
220 | if (objs->nents == 1) { |
221 | ret = dma_resv_lock_interruptible(obj: objs->objs[0]->resv, NULL); |
222 | } else { |
223 | ret = drm_gem_lock_reservations(objs: objs->objs, count: objs->nents, |
224 | acquire_ctx: &objs->ticket); |
225 | } |
226 | if (ret) |
227 | return ret; |
228 | |
229 | for (i = 0; i < objs->nents; ++i) { |
230 | ret = dma_resv_reserve_fences(obj: objs->objs[i]->resv, num_fences: 1); |
231 | if (ret) { |
232 | virtio_gpu_array_unlock_resv(objs); |
233 | return ret; |
234 | } |
235 | } |
236 | return ret; |
237 | } |
238 | |
239 | void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs) |
240 | { |
241 | if (objs->nents == 1) { |
242 | dma_resv_unlock(obj: objs->objs[0]->resv); |
243 | } else { |
244 | drm_gem_unlock_reservations(objs: objs->objs, count: objs->nents, |
245 | acquire_ctx: &objs->ticket); |
246 | } |
247 | } |
248 | |
249 | void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs, |
250 | struct dma_fence *fence) |
251 | { |
252 | int i; |
253 | |
254 | for (i = 0; i < objs->nents; i++) |
255 | dma_resv_add_fence(obj: objs->objs[i]->resv, fence, |
256 | usage: DMA_RESV_USAGE_WRITE); |
257 | } |
258 | |
259 | void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs) |
260 | { |
261 | u32 i; |
262 | |
263 | if (!objs) |
264 | return; |
265 | |
266 | for (i = 0; i < objs->nents; i++) |
267 | drm_gem_object_put(obj: objs->objs[i]); |
268 | virtio_gpu_array_free(objs); |
269 | } |
270 | |
271 | void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev, |
272 | struct virtio_gpu_object_array *objs) |
273 | { |
274 | spin_lock(lock: &vgdev->obj_free_lock); |
275 | list_add_tail(new: &objs->next, head: &vgdev->obj_free_list); |
276 | spin_unlock(lock: &vgdev->obj_free_lock); |
277 | schedule_work(work: &vgdev->obj_free_work); |
278 | } |
279 | |
280 | void virtio_gpu_array_put_free_work(struct work_struct *work) |
281 | { |
282 | struct virtio_gpu_device *vgdev = |
283 | container_of(work, struct virtio_gpu_device, obj_free_work); |
284 | struct virtio_gpu_object_array *objs; |
285 | |
286 | spin_lock(lock: &vgdev->obj_free_lock); |
287 | while (!list_empty(head: &vgdev->obj_free_list)) { |
288 | objs = list_first_entry(&vgdev->obj_free_list, |
289 | struct virtio_gpu_object_array, next); |
290 | list_del(entry: &objs->next); |
291 | spin_unlock(lock: &vgdev->obj_free_lock); |
292 | virtio_gpu_array_put_free(objs); |
293 | spin_lock(lock: &vgdev->obj_free_lock); |
294 | } |
295 | spin_unlock(lock: &vgdev->obj_free_lock); |
296 | } |
297 | |