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,
68 bool invalid_capset_id = false;
70 vgdev->capsets = kcalloc(num_capsets,
71 sizeof(struct virtio_gpu_drv_capset),
73 if (!vgdev->capsets) {
74 DRM_ERROR("failed to allocate cap sets\n");
77 for (i = 0; i < num_capsets; i++) {
78 virtio_gpu_cmd_get_capset_info(vgdev, i);
79 virtio_gpu_notify(vgdev);
80 ret = wait_event_timeout(vgdev->resp_wq,
81 vgdev->capsets[i].id > 0, 5 * HZ);
83 * Capability ids are defined in the virtio-gpu spec and are
84 * between 1 to 63, inclusive.
86 if (!vgdev->capsets[i].id ||
87 vgdev->capsets[i].id > MAX_CAPSET_ID)
88 invalid_capset_id = true;
91 DRM_ERROR("timed out waiting for cap set %d\n", i);
92 else if (invalid_capset_id)
93 DRM_ERROR("invalid capset id %u", vgdev->capsets[i].id);
95 if (ret == 0 || invalid_capset_id) {
96 spin_lock(&vgdev->display_info_lock);
97 kfree(vgdev->capsets);
98 vgdev->capsets = NULL;
99 spin_unlock(&vgdev->display_info_lock);
103 vgdev->capset_id_mask |= 1 << vgdev->capsets[i].id;
104 DRM_INFO("cap set %d: id %d, max-version %d, max-size %d\n",
105 i, vgdev->capsets[i].id,
106 vgdev->capsets[i].max_version,
107 vgdev->capsets[i].max_size);
110 vgdev->num_capsets = num_capsets;
113 int virtio_gpu_init(struct drm_device *dev)
115 static vq_callback_t *callbacks[] = {
116 virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack
118 static const char * const names[] = { "control", "cursor" };
120 struct virtio_gpu_device *vgdev;
121 /* this will expand later */
122 struct virtqueue *vqs[2];
123 u32 num_scanouts, num_capsets;
126 if (!virtio_has_feature(dev_to_virtio(dev->dev), VIRTIO_F_VERSION_1))
129 vgdev = kzalloc(sizeof(struct virtio_gpu_device), GFP_KERNEL);
134 dev->dev_private = vgdev;
135 vgdev->vdev = dev_to_virtio(dev->dev);
136 vgdev->dev = dev->dev;
138 spin_lock_init(&vgdev->display_info_lock);
139 spin_lock_init(&vgdev->resource_export_lock);
140 spin_lock_init(&vgdev->host_visible_lock);
141 ida_init(&vgdev->ctx_id_ida);
142 ida_init(&vgdev->resource_ida);
143 init_waitqueue_head(&vgdev->resp_wq);
144 virtio_gpu_init_vq(&vgdev->ctrlq, virtio_gpu_dequeue_ctrl_func);
145 virtio_gpu_init_vq(&vgdev->cursorq, virtio_gpu_dequeue_cursor_func);
147 vgdev->fence_drv.context = dma_fence_context_alloc(1);
148 spin_lock_init(&vgdev->fence_drv.lock);
149 INIT_LIST_HEAD(&vgdev->fence_drv.fences);
150 INIT_LIST_HEAD(&vgdev->cap_cache);
151 INIT_WORK(&vgdev->config_changed_work,
152 virtio_gpu_config_changed_work_func);
154 INIT_WORK(&vgdev->obj_free_work,
155 virtio_gpu_array_put_free_work);
156 INIT_LIST_HEAD(&vgdev->obj_free_list);
157 spin_lock_init(&vgdev->obj_free_lock);
159 #ifdef __LITTLE_ENDIAN
160 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_VIRGL))
161 vgdev->has_virgl_3d = true;
163 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_EDID)) {
164 vgdev->has_edid = true;
166 if (virtio_has_feature(vgdev->vdev, VIRTIO_RING_F_INDIRECT_DESC)) {
167 vgdev->has_indirect = true;
169 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_UUID)) {
170 vgdev->has_resource_assign_uuid = true;
172 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_BLOB)) {
173 vgdev->has_resource_blob = true;
175 if (virtio_get_shm_region(vgdev->vdev, &vgdev->host_visible_region,
176 VIRTIO_GPU_SHM_ID_HOST_VISIBLE)) {
177 if (!devm_request_mem_region(&vgdev->vdev->dev,
178 vgdev->host_visible_region.addr,
179 vgdev->host_visible_region.len,
180 dev_name(&vgdev->vdev->dev))) {
181 DRM_ERROR("Could not reserve host visible region\n");
186 DRM_INFO("Host memory window: 0x%lx +0x%lx\n",
187 (unsigned long)vgdev->host_visible_region.addr,
188 (unsigned long)vgdev->host_visible_region.len);
189 vgdev->has_host_visible = true;
190 drm_mm_init(&vgdev->host_visible_mm,
191 (unsigned long)vgdev->host_visible_region.addr,
192 (unsigned long)vgdev->host_visible_region.len);
194 if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_CONTEXT_INIT)) {
195 vgdev->has_context_init = true;
198 DRM_INFO("features: %cvirgl %cedid %cresource_blob %chost_visible",
199 vgdev->has_virgl_3d ? '+' : '-',
200 vgdev->has_edid ? '+' : '-',
201 vgdev->has_resource_blob ? '+' : '-',
202 vgdev->has_host_visible ? '+' : '-');
204 DRM_INFO("features: %ccontext_init\n",
205 vgdev->has_context_init ? '+' : '-');
207 ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL);
209 DRM_ERROR("failed to find virt queues\n");
212 vgdev->ctrlq.vq = vqs[0];
213 vgdev->cursorq.vq = vqs[1];
214 ret = virtio_gpu_alloc_vbufs(vgdev);
216 DRM_ERROR("failed to alloc vbufs\n");
220 /* get display info */
221 virtio_cread_le(vgdev->vdev, struct virtio_gpu_config,
222 num_scanouts, &num_scanouts);
223 vgdev->num_scanouts = min_t(uint32_t, num_scanouts,
224 VIRTIO_GPU_MAX_SCANOUTS);
225 if (!vgdev->num_scanouts) {
226 DRM_ERROR("num_scanouts is zero\n");
230 DRM_INFO("number of scanouts: %d\n", num_scanouts);
232 virtio_cread_le(vgdev->vdev, struct virtio_gpu_config,
233 num_capsets, &num_capsets);
234 DRM_INFO("number of cap sets: %d\n", num_capsets);
236 ret = virtio_gpu_modeset_init(vgdev);
238 DRM_ERROR("modeset init failed\n");
242 virtio_device_ready(vgdev->vdev);
245 virtio_gpu_get_capsets(vgdev, num_capsets);
247 virtio_gpu_cmd_get_edids(vgdev);
248 virtio_gpu_cmd_get_display_info(vgdev);
249 virtio_gpu_notify(vgdev);
250 wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending,
255 virtio_gpu_free_vbufs(vgdev);
257 vgdev->vdev->config->del_vqs(vgdev->vdev);
259 dev->dev_private = NULL;
264 static void virtio_gpu_cleanup_cap_cache(struct virtio_gpu_device *vgdev)
266 struct virtio_gpu_drv_cap_cache *cache_ent, *tmp;
268 list_for_each_entry_safe(cache_ent, tmp, &vgdev->cap_cache, head) {
269 kfree(cache_ent->caps_cache);
274 void virtio_gpu_deinit(struct drm_device *dev)
276 struct virtio_gpu_device *vgdev = dev->dev_private;
278 flush_work(&vgdev->obj_free_work);
279 flush_work(&vgdev->ctrlq.dequeue_work);
280 flush_work(&vgdev->cursorq.dequeue_work);
281 flush_work(&vgdev->config_changed_work);
282 virtio_reset_device(vgdev->vdev);
283 vgdev->vdev->config->del_vqs(vgdev->vdev);
286 void virtio_gpu_release(struct drm_device *dev)
288 struct virtio_gpu_device *vgdev = dev->dev_private;
293 virtio_gpu_modeset_fini(vgdev);
294 virtio_gpu_free_vbufs(vgdev);
295 virtio_gpu_cleanup_cap_cache(vgdev);
297 if (vgdev->has_host_visible)
298 drm_mm_takedown(&vgdev->host_visible_mm);
300 kfree(vgdev->capsets);
304 int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file)
306 struct virtio_gpu_device *vgdev = dev->dev_private;
307 struct virtio_gpu_fpriv *vfpriv;
310 /* can't create contexts without 3d renderer */
311 if (!vgdev->has_virgl_3d)
314 /* allocate a virt GPU context for this opener */
315 vfpriv = kzalloc(sizeof(*vfpriv), GFP_KERNEL);
319 mutex_init(&vfpriv->context_lock);
321 handle = ida_alloc(&vgdev->ctx_id_ida, GFP_KERNEL);
327 vfpriv->ctx_id = handle + 1;
328 file->driver_priv = vfpriv;
332 void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file)
334 struct virtio_gpu_device *vgdev = dev->dev_private;
335 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
337 if (!vgdev->has_virgl_3d)
340 if (vfpriv->context_created) {
341 virtio_gpu_cmd_context_destroy(vgdev, vfpriv->ctx_id);
342 virtio_gpu_notify(vgdev);
345 ida_free(&vgdev->ctx_id_ida, vfpriv->ctx_id - 1);
346 mutex_destroy(&vfpriv->context_lock);
348 file->driver_priv = NULL;