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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, &obj, NULL);
43 if (ret < 0)
44 return ret;
45
46 ret = drm_gem_handle_create(file, &obj->base.base, &handle);
47 if (ret) {
48 drm_gem_object_put(&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->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_priv, dev, &params, &gobj,
91 &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(obj->dev, file);
117
118 if (vfpriv->context_created) {
119 objs = virtio_gpu_array_alloc(1);
120 if (!objs)
121 return -ENOMEM;
122 virtio_gpu_array_add_obj(objs, obj);
123
124 virtio_gpu_cmd_context_attach_resource(vgdev, 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 if (vfpriv->context_created) {
143 objs = virtio_gpu_array_alloc(1);
144 if (!objs)
145 return;
146 virtio_gpu_array_add_obj(objs, obj);
147
148 virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
149 objs);
150 }
151 virtio_gpu_notify(vgdev);
152}
153
154/* For drm panic */
155struct virtio_gpu_object_array *virtio_gpu_panic_array_alloc(void)
156{
157 struct virtio_gpu_object_array *objs;
158
159 objs = kmalloc_obj(struct virtio_gpu_object_array, GFP_ATOMIC);
160 if (!objs)
161 return NULL;
162
163 objs->nents = 0;
164 objs->total = 1;
165 return objs;
166}
167
168struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
169{
170 struct virtio_gpu_object_array *objs;
171
172 objs = kmalloc_flex(*objs, objs, nents);
173 if (!objs)
174 return NULL;
175
176 objs->nents = 0;
177 objs->total = nents;
178 return objs;
179}
180
181static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs)
182{
183 kfree(objs);
184}
185
186struct virtio_gpu_object_array*
187virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents)
188{
189 struct virtio_gpu_object_array *objs;
190 u32 i;
191
192 objs = virtio_gpu_array_alloc(nents);
193 if (!objs)
194 return NULL;
195
196 for (i = 0; i < nents; i++) {
197 objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]);
198 if (!objs->objs[i]) {
199 objs->nents = i;
200 virtio_gpu_array_put_free(objs);
201 return NULL;
202 }
203 }
204 objs->nents = i;
205 return objs;
206}
207
208void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,
209 struct drm_gem_object *obj)
210{
211 if (WARN_ON_ONCE(objs->nents == objs->total))
212 return;
213
214 drm_gem_object_get(obj);
215 objs->objs[objs->nents] = obj;
216 objs->nents++;
217}
218
219int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs)
220{
221 unsigned int i;
222 int ret;
223
224 if (objs->nents == 1) {
225 ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL);
226 } else {
227 ret = drm_gem_lock_reservations(objs->objs, objs->nents,
228 &objs->ticket);
229 }
230 if (ret)
231 return ret;
232
233 for (i = 0; i < objs->nents; ++i) {
234 ret = dma_resv_reserve_fences(objs->objs[i]->resv, 1);
235 if (ret) {
236 virtio_gpu_array_unlock_resv(objs);
237 return ret;
238 }
239 }
240 return ret;
241}
242
243int virtio_gpu_lock_one_resv_uninterruptible(struct virtio_gpu_object_array *objs)
244{
245 int ret;
246
247 if (objs->nents != 1)
248 return -EINVAL;
249
250 dma_resv_lock(objs->objs[0]->resv, NULL);
251
252 ret = dma_resv_reserve_fences(objs->objs[0]->resv, 1);
253 if (ret) {
254 virtio_gpu_array_unlock_resv(objs);
255 return ret;
256 }
257 return 0;
258}
259
260void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs)
261{
262 if (objs->nents == 1) {
263 dma_resv_unlock(objs->objs[0]->resv);
264 } else {
265 drm_gem_unlock_reservations(objs->objs, objs->nents,
266 &objs->ticket);
267 }
268}
269
270void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,
271 struct dma_fence *fence)
272{
273 int i;
274
275 for (i = 0; i < objs->nents; i++)
276 dma_resv_add_fence(objs->objs[i]->resv, fence,
277 DMA_RESV_USAGE_WRITE);
278}
279
280void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs)
281{
282 u32 i;
283
284 if (!objs)
285 return;
286
287 for (i = 0; i < objs->nents; i++)
288 drm_gem_object_put(objs->objs[i]);
289 virtio_gpu_array_free(objs);
290}
291
292void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,
293 struct virtio_gpu_object_array *objs)
294{
295 spin_lock(&vgdev->obj_free_lock);
296 list_add_tail(&objs->next, &vgdev->obj_free_list);
297 spin_unlock(&vgdev->obj_free_lock);
298 schedule_work(&vgdev->obj_free_work);
299}
300
301void virtio_gpu_array_put_free_work(struct work_struct *work)
302{
303 struct virtio_gpu_device *vgdev =
304 container_of(work, struct virtio_gpu_device, obj_free_work);
305 struct virtio_gpu_object_array *objs;
306
307 spin_lock(&vgdev->obj_free_lock);
308 while (!list_empty(&vgdev->obj_free_list)) {
309 objs = list_first_entry(&vgdev->obj_free_list,
310 struct virtio_gpu_object_array, next);
311 list_del(&objs->next);
312 spin_unlock(&vgdev->obj_free_lock);
313 virtio_gpu_array_put_free(objs);
314 spin_lock(&vgdev->obj_free_lock);
315 }
316 spin_unlock(&vgdev->obj_free_lock);
317}