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dc5698e8 DA |
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 <linux/virtio.h> | |
27 | #include <linux/virtio_config.h> | |
5038a567 | 28 | #include <linux/virtio_ring.h> |
a3d63977 SR |
29 | |
30 | #include <drm/drm_file.h> | |
31 | ||
dc5698e8 DA |
32 | #include "virtgpu_drv.h" |
33 | ||
dc5698e8 DA |
34 | static void virtio_gpu_config_changed_work_func(struct work_struct *work) |
35 | { | |
36 | struct virtio_gpu_device *vgdev = | |
37 | container_of(work, struct virtio_gpu_device, | |
38 | config_changed_work); | |
39 | u32 events_read, events_clear = 0; | |
40 | ||
41 | /* read the config space */ | |
42 | virtio_cread(vgdev->vdev, struct virtio_gpu_config, | |
43 | events_read, &events_read); | |
44 | if (events_read & VIRTIO_GPU_EVENT_DISPLAY) { | |
b4b01b49 GH |
45 | if (vgdev->has_edid) |
46 | virtio_gpu_cmd_get_edids(vgdev); | |
dc5698e8 | 47 | virtio_gpu_cmd_get_display_info(vgdev); |
234489ea | 48 | virtio_gpu_notify(vgdev); |
dc5698e8 DA |
49 | drm_helper_hpd_irq_event(vgdev->ddev); |
50 | events_clear |= VIRTIO_GPU_EVENT_DISPLAY; | |
51 | } | |
52 | virtio_cwrite(vgdev->vdev, struct virtio_gpu_config, | |
53 | events_clear, &events_clear); | |
54 | } | |
55 | ||
56 | static void virtio_gpu_init_vq(struct virtio_gpu_queue *vgvq, | |
57 | void (*work_func)(struct work_struct *work)) | |
58 | { | |
59 | spin_lock_init(&vgvq->qlock); | |
60 | init_waitqueue_head(&vgvq->ack_queue); | |
61 | INIT_WORK(&vgvq->dequeue_work, work_func); | |
62 | } | |
63 | ||
62fb7a5e GH |
64 | static void virtio_gpu_get_capsets(struct virtio_gpu_device *vgdev, |
65 | int num_capsets) | |
66 | { | |
67 | int i, ret; | |
68 | ||
69 | vgdev->capsets = kcalloc(num_capsets, | |
70 | sizeof(struct virtio_gpu_drv_capset), | |
71 | GFP_KERNEL); | |
72 | if (!vgdev->capsets) { | |
73 | DRM_ERROR("failed to allocate cap sets\n"); | |
74 | return; | |
75 | } | |
76 | for (i = 0; i < num_capsets; i++) { | |
77 | virtio_gpu_cmd_get_capset_info(vgdev, i); | |
97452907 | 78 | virtio_gpu_notify(vgdev); |
62fb7a5e GH |
79 | ret = wait_event_timeout(vgdev->resp_wq, |
80 | vgdev->capsets[i].id > 0, 5 * HZ); | |
81 | if (ret == 0) { | |
82 | DRM_ERROR("timed out waiting for cap set %d\n", i); | |
83 | kfree(vgdev->capsets); | |
84 | vgdev->capsets = NULL; | |
85 | return; | |
86 | } | |
87 | DRM_INFO("cap set %d: id %d, max-version %d, max-size %d\n", | |
88 | i, vgdev->capsets[i].id, | |
89 | vgdev->capsets[i].max_version, | |
90 | vgdev->capsets[i].max_size); | |
91 | } | |
92 | vgdev->num_capsets = num_capsets; | |
93 | } | |
94 | ||
d516e75c | 95 | int virtio_gpu_init(struct drm_device *dev) |
dc5698e8 DA |
96 | { |
97 | static vq_callback_t *callbacks[] = { | |
98 | virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack | |
99 | }; | |
f7ad26ff | 100 | static const char * const names[] = { "control", "cursor" }; |
dc5698e8 DA |
101 | |
102 | struct virtio_gpu_device *vgdev; | |
103 | /* this will expand later */ | |
104 | struct virtqueue *vqs[2]; | |
62fb7a5e | 105 | u32 num_scanouts, num_capsets; |
dc5698e8 DA |
106 | int ret; |
107 | ||
18e51064 | 108 | if (!virtio_has_feature(dev_to_virtio(dev->dev), VIRTIO_F_VERSION_1)) |
dc5698e8 DA |
109 | return -ENODEV; |
110 | ||
111 | vgdev = kzalloc(sizeof(struct virtio_gpu_device), GFP_KERNEL); | |
112 | if (!vgdev) | |
113 | return -ENOMEM; | |
114 | ||
115 | vgdev->ddev = dev; | |
116 | dev->dev_private = vgdev; | |
18e51064 | 117 | vgdev->vdev = dev_to_virtio(dev->dev); |
dc5698e8 DA |
118 | vgdev->dev = dev->dev; |
119 | ||
120 | spin_lock_init(&vgdev->display_info_lock); | |
1938d1ae MW |
121 | ida_init(&vgdev->ctx_id_ida); |
122 | ida_init(&vgdev->resource_ida); | |
dc5698e8 DA |
123 | init_waitqueue_head(&vgdev->resp_wq); |
124 | virtio_gpu_init_vq(&vgdev->ctrlq, virtio_gpu_dequeue_ctrl_func); | |
125 | virtio_gpu_init_vq(&vgdev->cursorq, virtio_gpu_dequeue_cursor_func); | |
126 | ||
f54d1867 | 127 | vgdev->fence_drv.context = dma_fence_context_alloc(1); |
dc5698e8 DA |
128 | spin_lock_init(&vgdev->fence_drv.lock); |
129 | INIT_LIST_HEAD(&vgdev->fence_drv.fences); | |
62fb7a5e | 130 | INIT_LIST_HEAD(&vgdev->cap_cache); |
dc5698e8 DA |
131 | INIT_WORK(&vgdev->config_changed_work, |
132 | virtio_gpu_config_changed_work_func); | |
133 | ||
f0c6cef7 GH |
134 | INIT_WORK(&vgdev->obj_free_work, |
135 | virtio_gpu_array_put_free_work); | |
136 | INIT_LIST_HEAD(&vgdev->obj_free_list); | |
137 | spin_lock_init(&vgdev->obj_free_lock); | |
138 | ||
ff2ac58a | 139 | #ifdef __LITTLE_ENDIAN |
62fb7a5e GH |
140 | if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_VIRGL)) |
141 | vgdev->has_virgl_3d = true; | |
ff2ac58a | 142 | #endif |
b4b01b49 GH |
143 | if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_EDID)) { |
144 | vgdev->has_edid = true; | |
b4b01b49 | 145 | } |
5edbb560 GH |
146 | if (virtio_has_feature(vgdev->vdev, VIRTIO_RING_F_INDIRECT_DESC)) { |
147 | vgdev->has_indirect = true; | |
148 | } | |
62fb7a5e | 149 | |
9e370dfe GH |
150 | DRM_INFO("features: %cvirgl %cedid\n", |
151 | vgdev->has_virgl_3d ? '+' : '-', | |
152 | vgdev->has_edid ? '+' : '-'); | |
153 | ||
9b2bbdb2 | 154 | ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL); |
dc5698e8 DA |
155 | if (ret) { |
156 | DRM_ERROR("failed to find virt queues\n"); | |
157 | goto err_vqs; | |
158 | } | |
159 | vgdev->ctrlq.vq = vqs[0]; | |
160 | vgdev->cursorq.vq = vqs[1]; | |
161 | ret = virtio_gpu_alloc_vbufs(vgdev); | |
162 | if (ret) { | |
163 | DRM_ERROR("failed to alloc vbufs\n"); | |
164 | goto err_vbufs; | |
165 | } | |
166 | ||
dc5698e8 DA |
167 | /* get display info */ |
168 | virtio_cread(vgdev->vdev, struct virtio_gpu_config, | |
169 | num_scanouts, &num_scanouts); | |
170 | vgdev->num_scanouts = min_t(uint32_t, num_scanouts, | |
171 | VIRTIO_GPU_MAX_SCANOUTS); | |
172 | if (!vgdev->num_scanouts) { | |
173 | DRM_ERROR("num_scanouts is zero\n"); | |
174 | ret = -EINVAL; | |
175 | goto err_scanouts; | |
176 | } | |
62fb7a5e GH |
177 | DRM_INFO("number of scanouts: %d\n", num_scanouts); |
178 | ||
179 | virtio_cread(vgdev->vdev, struct virtio_gpu_config, | |
180 | num_capsets, &num_capsets); | |
181 | DRM_INFO("number of cap sets: %d\n", num_capsets); | |
dc5698e8 | 182 | |
d516e75c | 183 | virtio_gpu_modeset_init(vgdev); |
dc5698e8 DA |
184 | |
185 | virtio_device_ready(vgdev->vdev); | |
dc5698e8 | 186 | |
62fb7a5e GH |
187 | if (num_capsets) |
188 | virtio_gpu_get_capsets(vgdev, num_capsets); | |
b4b01b49 GH |
189 | if (vgdev->has_edid) |
190 | virtio_gpu_cmd_get_edids(vgdev); | |
441012af | 191 | virtio_gpu_cmd_get_display_info(vgdev); |
234489ea | 192 | virtio_gpu_notify(vgdev); |
441012af DA |
193 | wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending, |
194 | 5 * HZ); | |
dc5698e8 DA |
195 | return 0; |
196 | ||
dc5698e8 | 197 | err_scanouts: |
dc5698e8 DA |
198 | virtio_gpu_free_vbufs(vgdev); |
199 | err_vbufs: | |
200 | vgdev->vdev->config->del_vqs(vgdev->vdev); | |
201 | err_vqs: | |
202 | kfree(vgdev); | |
203 | return ret; | |
204 | } | |
205 | ||
62fb7a5e GH |
206 | static void virtio_gpu_cleanup_cap_cache(struct virtio_gpu_device *vgdev) |
207 | { | |
208 | struct virtio_gpu_drv_cap_cache *cache_ent, *tmp; | |
209 | ||
210 | list_for_each_entry_safe(cache_ent, tmp, &vgdev->cap_cache, head) { | |
211 | kfree(cache_ent->caps_cache); | |
212 | kfree(cache_ent); | |
213 | } | |
214 | } | |
215 | ||
d516e75c | 216 | void virtio_gpu_deinit(struct drm_device *dev) |
dc5698e8 DA |
217 | { |
218 | struct virtio_gpu_device *vgdev = dev->dev_private; | |
219 | ||
f0c6cef7 | 220 | flush_work(&vgdev->obj_free_work); |
dc5698e8 DA |
221 | flush_work(&vgdev->ctrlq.dequeue_work); |
222 | flush_work(&vgdev->cursorq.dequeue_work); | |
223 | flush_work(&vgdev->config_changed_work); | |
edde9fc5 | 224 | vgdev->vdev->config->reset(vgdev->vdev); |
dc5698e8 | 225 | vgdev->vdev->config->del_vqs(vgdev->vdev); |
b1df3a2b GH |
226 | } |
227 | ||
228 | void virtio_gpu_release(struct drm_device *dev) | |
229 | { | |
230 | struct virtio_gpu_device *vgdev = dev->dev_private; | |
dc5698e8 DA |
231 | |
232 | virtio_gpu_modeset_fini(vgdev); | |
dc5698e8 | 233 | virtio_gpu_free_vbufs(vgdev); |
62fb7a5e GH |
234 | virtio_gpu_cleanup_cap_cache(vgdev); |
235 | kfree(vgdev->capsets); | |
dc5698e8 | 236 | kfree(vgdev); |
dc5698e8 | 237 | } |
62fb7a5e GH |
238 | |
239 | int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file) | |
240 | { | |
241 | struct virtio_gpu_device *vgdev = dev->dev_private; | |
242 | struct virtio_gpu_fpriv *vfpriv; | |
40cadedd | 243 | int handle; |
62fb7a5e GH |
244 | |
245 | /* can't create contexts without 3d renderer */ | |
246 | if (!vgdev->has_virgl_3d) | |
247 | return 0; | |
248 | ||
62fb7a5e GH |
249 | /* allocate a virt GPU context for this opener */ |
250 | vfpriv = kzalloc(sizeof(*vfpriv), GFP_KERNEL); | |
251 | if (!vfpriv) | |
252 | return -ENOMEM; | |
253 | ||
d2a983b2 GS |
254 | mutex_init(&vfpriv->context_lock); |
255 | ||
40cadedd GS |
256 | handle = ida_alloc(&vgdev->ctx_id_ida, GFP_KERNEL); |
257 | if (handle < 0) { | |
040b595a | 258 | kfree(vfpriv); |
40cadedd | 259 | return handle; |
040b595a | 260 | } |
62fb7a5e | 261 | |
40cadedd | 262 | vfpriv->ctx_id = handle + 1; |
62fb7a5e GH |
263 | file->driver_priv = vfpriv; |
264 | return 0; | |
265 | } | |
266 | ||
267 | void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file) | |
268 | { | |
269 | struct virtio_gpu_device *vgdev = dev->dev_private; | |
45c5d2a4 | 270 | struct virtio_gpu_fpriv *vfpriv = file->driver_priv; |
62fb7a5e GH |
271 | |
272 | if (!vgdev->has_virgl_3d) | |
273 | return; | |
274 | ||
45c5d2a4 GS |
275 | if (vfpriv->context_created) { |
276 | virtio_gpu_cmd_context_destroy(vgdev, vfpriv->ctx_id); | |
277 | virtio_gpu_notify(vgdev); | |
278 | } | |
62fb7a5e | 279 | |
45c5d2a4 | 280 | ida_free(&vgdev->ctx_id_ida, vfpriv->ctx_id - 1); |
d2a983b2 | 281 | mutex_destroy(&vfpriv->context_lock); |
62fb7a5e GH |
282 | kfree(vfpriv); |
283 | file->driver_priv = NULL; | |
284 | } |