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
31static 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
61int 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: &params, obj_p: &gobj,
91 handle_p: &args->handle);
92 if (ret)
93 goto fail;
94
95 args->pitch = pitch;
96 return ret;
97
98fail:
99 return ret;
100}
101
102int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
103 struct drm_file *file)
104{
105 struct virtio_gpu_device *vgdev = obj->dev->dev_private;
106 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
107 struct virtio_gpu_object_array *objs;
108
109 if (!vgdev->has_virgl_3d)
110 goto out_notify;
111
112 /* the context might still be missing when the first ioctl is
113 * DRM_IOCTL_MODE_CREATE_DUMB or DRM_IOCTL_PRIME_FD_TO_HANDLE
114 */
115 if (!vgdev->has_context_init)
116 virtio_gpu_create_context(dev: obj->dev, file);
117
118 if (vfpriv->context_created) {
119 objs = virtio_gpu_array_alloc(nents: 1);
120 if (!objs)
121 return -ENOMEM;
122 virtio_gpu_array_add_obj(objs, obj);
123
124 virtio_gpu_cmd_context_attach_resource(vgdev, ctx_id: vfpriv->ctx_id, objs);
125 }
126
127out_notify:
128 virtio_gpu_notify(vgdev);
129 return 0;
130}
131
132void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
133 struct drm_file *file)
134{
135 struct virtio_gpu_device *vgdev = obj->dev->dev_private;
136 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
137 struct virtio_gpu_object_array *objs;
138
139 if (!vgdev->has_virgl_3d)
140 return;
141
142 objs = virtio_gpu_array_alloc(nents: 1);
143 if (!objs)
144 return;
145 virtio_gpu_array_add_obj(objs, obj);
146
147 virtio_gpu_cmd_context_detach_resource(vgdev, ctx_id: vfpriv->ctx_id,
148 objs);
149 virtio_gpu_notify(vgdev);
150}
151
152/* For drm panic */
153struct virtio_gpu_object_array *virtio_gpu_panic_array_alloc(void)
154{
155 struct virtio_gpu_object_array *objs;
156
157 objs = kmalloc(sizeof(struct virtio_gpu_object_array), GFP_ATOMIC);
158 if (!objs)
159 return NULL;
160
161 objs->nents = 0;
162 objs->total = 1;
163 return objs;
164}
165
166struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
167{
168 struct virtio_gpu_object_array *objs;
169
170 objs = kmalloc(struct_size(objs, objs, nents), GFP_KERNEL);
171 if (!objs)
172 return NULL;
173
174 objs->nents = 0;
175 objs->total = nents;
176 return objs;
177}
178
179static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs)
180{
181 kfree(objp: objs);
182}
183
184struct virtio_gpu_object_array*
185virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents)
186{
187 struct virtio_gpu_object_array *objs;
188 u32 i;
189
190 objs = virtio_gpu_array_alloc(nents);
191 if (!objs)
192 return NULL;
193
194 for (i = 0; i < nents; i++) {
195 objs->objs[i] = drm_gem_object_lookup(filp: drm_file, handle: handles[i]);
196 if (!objs->objs[i]) {
197 objs->nents = i;
198 virtio_gpu_array_put_free(objs);
199 return NULL;
200 }
201 }
202 objs->nents = i;
203 return objs;
204}
205
206void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,
207 struct drm_gem_object *obj)
208{
209 if (WARN_ON_ONCE(objs->nents == objs->total))
210 return;
211
212 drm_gem_object_get(obj);
213 objs->objs[objs->nents] = obj;
214 objs->nents++;
215}
216
217int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs)
218{
219 unsigned int i;
220 int ret;
221
222 if (objs->nents == 1) {
223 ret = dma_resv_lock_interruptible(obj: objs->objs[0]->resv, NULL);
224 } else {
225 ret = drm_gem_lock_reservations(objs: objs->objs, count: objs->nents,
226 acquire_ctx: &objs->ticket);
227 }
228 if (ret)
229 return ret;
230
231 for (i = 0; i < objs->nents; ++i) {
232 ret = dma_resv_reserve_fences(obj: objs->objs[i]->resv, num_fences: 1);
233 if (ret) {
234 virtio_gpu_array_unlock_resv(objs);
235 return ret;
236 }
237 }
238 return ret;
239}
240
241void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs)
242{
243 if (objs->nents == 1) {
244 dma_resv_unlock(obj: objs->objs[0]->resv);
245 } else {
246 drm_gem_unlock_reservations(objs: objs->objs, count: objs->nents,
247 acquire_ctx: &objs->ticket);
248 }
249}
250
251void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,
252 struct dma_fence *fence)
253{
254 int i;
255
256 for (i = 0; i < objs->nents; i++)
257 dma_resv_add_fence(obj: objs->objs[i]->resv, fence,
258 usage: DMA_RESV_USAGE_WRITE);
259}
260
261void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs)
262{
263 u32 i;
264
265 if (!objs)
266 return;
267
268 for (i = 0; i < objs->nents; i++)
269 drm_gem_object_put(obj: objs->objs[i]);
270 virtio_gpu_array_free(objs);
271}
272
273void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,
274 struct virtio_gpu_object_array *objs)
275{
276 spin_lock(lock: &vgdev->obj_free_lock);
277 list_add_tail(new: &objs->next, head: &vgdev->obj_free_list);
278 spin_unlock(lock: &vgdev->obj_free_lock);
279 schedule_work(work: &vgdev->obj_free_work);
280}
281
282void virtio_gpu_array_put_free_work(struct work_struct *work)
283{
284 struct virtio_gpu_device *vgdev =
285 container_of(work, struct virtio_gpu_device, obj_free_work);
286 struct virtio_gpu_object_array *objs;
287
288 spin_lock(lock: &vgdev->obj_free_lock);
289 while (!list_empty(head: &vgdev->obj_free_list)) {
290 objs = list_first_entry(&vgdev->obj_free_list,
291 struct virtio_gpu_object_array, next);
292 list_del(entry: &objs->next);
293 spin_unlock(lock: &vgdev->obj_free_lock);
294 virtio_gpu_array_put_free(objs);
295 spin_lock(lock: &vgdev->obj_free_lock);
296 }
297 spin_unlock(lock: &vgdev->obj_free_lock);
298}
299

source code of linux/drivers/gpu/drm/virtio/virtgpu_gem.c