2 * Copyright (C) 2015 Red Hat, Inc.
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:
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.
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.
26 #include <linux/virtio.h>
27 #include <linux/virtio_config.h>
28 #include <linux/virtio_ring.h>
30 #include <drm/drm_file.h>
32 #include "virtgpu_drv.h"
34 static void virtio_gpu_config_changed_work_func(struct work_struct *work)
36 struct virtio_gpu_device *vgdev =
37 container_of(work, struct virtio_gpu_device,
39 u32 events_read, events_clear = 0;
41 /* read the config space */
42 virtio_cread_le(vgdev->vdev, struct virtio_gpu_config,
43 events_read, &events_read);
44 if (events_read & VIRTIO_GPU_EVENT_DISPLAY) {
46 virtio_gpu_cmd_get_edids(vgdev);
47 virtio_gpu_cmd_get_display_info(vgdev);
48 virtio_gpu_notify(vgdev);
49 drm_helper_hpd_irq_event(vgdev->ddev);
50 events_clear |= VIRTIO_GPU_EVENT_DISPLAY;
52 virtio_cwrite_le(vgdev->vdev, struct virtio_gpu_config,
53 events_clear, &events_clear);
56 static void virtio_gpu_init_vq(struct virtio_gpu_queue *vgvq,
57 void (*work_func)(struct work_struct *work))
59 spin_lock_init(&vgvq->qlock);
60 init_waitqueue_head(&vgvq->ack_queue);
61 INIT_WORK(&vgvq->dequeue_work, work_func);
64 static void virtio_gpu_get_capsets(struct virtio_gpu_device *vgdev,
69 vgdev->capsets = kcalloc(num_capsets,
70 sizeof(struct virtio_gpu_drv_capset),
72 if (!vgdev->capsets) {
73 DRM_ERROR("failed to allocate cap sets\n");
76 for (i = 0; i < num_capsets; i++) {
77 virtio_gpu_cmd_get_capset_info(vgdev, i);
78 virtio_gpu_notify(vgdev);
79 ret = wait_event_timeout(vgdev->resp_wq,
80 vgdev->capsets[i].id > 0, 5 * HZ);
82 DRM_ERROR("timed out waiting for cap set %d\n", i);
83 kfree(vgdev->capsets);
84 vgdev->capsets = NULL;
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);
92 vgdev->num_capsets = num_capsets;
95 int virtio_gpu_init(struct drm_device *dev)
97 static vq_callback_t *callbacks[] = {
98 virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack
100 static const char * const names[] = { "control", "cursor" };
102 struct virtio_gpu_device *vgdev;
103 /* this will expand later */
104 struct virtqueue *vqs[2];
105 u32 num_scanouts, num_capsets;
108 if (!virtio_has_feature(dev_to_virtio(dev->dev), VIRTIO_F_VERSION_1))
111 vgdev = kzalloc(sizeof(struct virtio_gpu_device), GFP_KERNEL);
116 dev->dev_private = vgdev;
117 vgdev->vdev = dev_to_virtio(dev->dev);
118 vgdev->dev = dev->dev;
120 spin_lock_init(&vgdev->display_info_lock);
121 spin_lock_init(&vgdev->resource_export_lock);
122 ida_init(&vgdev->ctx_id_ida);
123 ida_init(&vgdev->resource_ida);
124 init_waitqueue_head(&vgdev->resp_wq);
125 virtio_gpu_init_vq(&vgdev->ctrlq, virtio_gpu_dequeue_ctrl_func);
126 virtio_gpu_init_vq(&vgdev->cursorq, virtio_gpu_dequeue_cursor_func);
128 vgdev->fence_drv.context = dma_fence_context_alloc(1);
129 spin_lock_init(&vgdev->fence_drv.lock);
130 INIT_LIST_HEAD(&vgdev->fence_drv.fences);
131 INIT_LIST_HEAD(&vgdev->cap_cache);
132 INIT_WORK(&vgdev->config_changed_work,
133 virtio_gpu_config_changed_work_func);
135 INIT_WORK(&vgdev->obj_free_work,
136 virtio_gpu_array_put_free_work);
137 INIT_LIST_HEAD(&vgdev->obj_free_list);
138 spin_lock_init(&vgdev->obj_free_lock);
140 #ifdef __LITTLE_ENDIAN
141 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_VIRGL))
142 vgdev->has_virgl_3d = true;
144 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_EDID)) {
145 vgdev->has_edid = true;
147 if (virtio_has_feature(vgdev->vdev, VIRTIO_RING_F_INDIRECT_DESC)) {
148 vgdev->has_indirect = true;
150 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_UUID)) {
151 vgdev->has_resource_assign_uuid = true;
154 DRM_INFO("features: %cvirgl %cedid\n",
155 vgdev->has_virgl_3d ? '+' : '-',
156 vgdev->has_edid ? '+' : '-');
158 ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL);
160 DRM_ERROR("failed to find virt queues\n");
163 vgdev->ctrlq.vq = vqs[0];
164 vgdev->cursorq.vq = vqs[1];
165 ret = virtio_gpu_alloc_vbufs(vgdev);
167 DRM_ERROR("failed to alloc vbufs\n");
171 /* get display info */
172 virtio_cread_le(vgdev->vdev, struct virtio_gpu_config,
173 num_scanouts, &num_scanouts);
174 vgdev->num_scanouts = min_t(uint32_t, num_scanouts,
175 VIRTIO_GPU_MAX_SCANOUTS);
176 if (!vgdev->num_scanouts) {
177 DRM_ERROR("num_scanouts is zero\n");
181 DRM_INFO("number of scanouts: %d\n", num_scanouts);
183 virtio_cread_le(vgdev->vdev, struct virtio_gpu_config,
184 num_capsets, &num_capsets);
185 DRM_INFO("number of cap sets: %d\n", num_capsets);
187 virtio_gpu_modeset_init(vgdev);
189 virtio_device_ready(vgdev->vdev);
192 virtio_gpu_get_capsets(vgdev, num_capsets);
194 virtio_gpu_cmd_get_edids(vgdev);
195 virtio_gpu_cmd_get_display_info(vgdev);
196 virtio_gpu_notify(vgdev);
197 wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending,
202 virtio_gpu_free_vbufs(vgdev);
204 vgdev->vdev->config->del_vqs(vgdev->vdev);
210 static void virtio_gpu_cleanup_cap_cache(struct virtio_gpu_device *vgdev)
212 struct virtio_gpu_drv_cap_cache *cache_ent, *tmp;
214 list_for_each_entry_safe(cache_ent, tmp, &vgdev->cap_cache, head) {
215 kfree(cache_ent->caps_cache);
220 void virtio_gpu_deinit(struct drm_device *dev)
222 struct virtio_gpu_device *vgdev = dev->dev_private;
224 flush_work(&vgdev->obj_free_work);
225 flush_work(&vgdev->ctrlq.dequeue_work);
226 flush_work(&vgdev->cursorq.dequeue_work);
227 flush_work(&vgdev->config_changed_work);
228 vgdev->vdev->config->reset(vgdev->vdev);
229 vgdev->vdev->config->del_vqs(vgdev->vdev);
232 void virtio_gpu_release(struct drm_device *dev)
234 struct virtio_gpu_device *vgdev = dev->dev_private;
236 virtio_gpu_modeset_fini(vgdev);
237 virtio_gpu_free_vbufs(vgdev);
238 virtio_gpu_cleanup_cap_cache(vgdev);
239 kfree(vgdev->capsets);
243 int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file)
245 struct virtio_gpu_device *vgdev = dev->dev_private;
246 struct virtio_gpu_fpriv *vfpriv;
249 /* can't create contexts without 3d renderer */
250 if (!vgdev->has_virgl_3d)
253 /* allocate a virt GPU context for this opener */
254 vfpriv = kzalloc(sizeof(*vfpriv), GFP_KERNEL);
258 mutex_init(&vfpriv->context_lock);
260 handle = ida_alloc(&vgdev->ctx_id_ida, GFP_KERNEL);
266 vfpriv->ctx_id = handle + 1;
267 file->driver_priv = vfpriv;
271 void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file)
273 struct virtio_gpu_device *vgdev = dev->dev_private;
274 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
276 if (!vgdev->has_virgl_3d)
279 if (vfpriv->context_created) {
280 virtio_gpu_cmd_context_destroy(vgdev, vfpriv->ctx_id);
281 virtio_gpu_notify(vgdev);
284 ida_free(&vgdev->ctx_id_ida, vfpriv->ctx_id - 1);
285 mutex_destroy(&vfpriv->context_lock);
287 file->driver_priv = NULL;