--- /dev/null
+/*
+ * Copyright (C) 2015 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/virtio.h>
+#include <linux/virtio_config.h>
+#include <drm/drmP.h>
+#include "virtgpu_drv.h"
+
+static int virtio_gpu_fbdev = 1;
+
+MODULE_PARM_DESC(fbdev, "Disable/Enable framebuffer device & console");
+module_param_named(fbdev, virtio_gpu_fbdev, int, 0400);
+
+static void virtio_gpu_config_changed_work_func(struct work_struct *work)
+{
+ struct virtio_gpu_device *vgdev =
+ container_of(work, struct virtio_gpu_device,
+ config_changed_work);
+ u32 events_read, events_clear = 0;
+
+ /* read the config space */
+ virtio_cread(vgdev->vdev, struct virtio_gpu_config,
+ events_read, &events_read);
+ if (events_read & VIRTIO_GPU_EVENT_DISPLAY) {
+ virtio_gpu_cmd_get_display_info(vgdev);
+ drm_helper_hpd_irq_event(vgdev->ddev);
+ events_clear |= VIRTIO_GPU_EVENT_DISPLAY;
+ }
+ virtio_cwrite(vgdev->vdev, struct virtio_gpu_config,
+ events_clear, &events_clear);
+}
+
+static void virtio_gpu_ctx_id_get(struct virtio_gpu_device *vgdev,
+ uint32_t *resid)
+{
+ int handle;
+
+ idr_preload(GFP_KERNEL);
+ spin_lock(&vgdev->ctx_id_idr_lock);
+ handle = idr_alloc(&vgdev->ctx_id_idr, NULL, 1, 0, 0);
+ spin_unlock(&vgdev->ctx_id_idr_lock);
+ idr_preload_end();
+ *resid = handle;
+}
+
+static void virtio_gpu_ctx_id_put(struct virtio_gpu_device *vgdev, uint32_t id)
+{
+ spin_lock(&vgdev->ctx_id_idr_lock);
+ idr_remove(&vgdev->ctx_id_idr, id);
+ spin_unlock(&vgdev->ctx_id_idr_lock);
+}
+
+static void virtio_gpu_context_create(struct virtio_gpu_device *vgdev,
+ uint32_t nlen, const char *name,
+ uint32_t *ctx_id)
+{
+ virtio_gpu_ctx_id_get(vgdev, ctx_id);
+ virtio_gpu_cmd_context_create(vgdev, *ctx_id, nlen, name);
+}
+
+static void virtio_gpu_context_destroy(struct virtio_gpu_device *vgdev,
+ uint32_t ctx_id)
+{
+ virtio_gpu_cmd_context_destroy(vgdev, ctx_id);
+ virtio_gpu_ctx_id_put(vgdev, ctx_id);
+}
+
+static void virtio_gpu_init_vq(struct virtio_gpu_queue *vgvq,
+ void (*work_func)(struct work_struct *work))
+{
+ spin_lock_init(&vgvq->qlock);
+ init_waitqueue_head(&vgvq->ack_queue);
+ INIT_WORK(&vgvq->dequeue_work, work_func);
+}
+
+static void virtio_gpu_get_capsets(struct virtio_gpu_device *vgdev,
+ int num_capsets)
+{
+ int i, ret;
+
+ vgdev->capsets = kcalloc(num_capsets,
+ sizeof(struct virtio_gpu_drv_capset),
+ GFP_KERNEL);
+ if (!vgdev->capsets) {
+ DRM_ERROR("failed to allocate cap sets\n");
+ return;
+ }
+ for (i = 0; i < num_capsets; i++) {
+ virtio_gpu_cmd_get_capset_info(vgdev, i);
+ ret = wait_event_timeout(vgdev->resp_wq,
+ vgdev->capsets[i].id > 0, 5 * HZ);
+ if (ret == 0) {
+ DRM_ERROR("timed out waiting for cap set %d\n", i);
+ kfree(vgdev->capsets);
+ vgdev->capsets = NULL;
+ return;
+ }
+ DRM_INFO("cap set %d: id %d, max-version %d, max-size %d\n",
+ i, vgdev->capsets[i].id,
+ vgdev->capsets[i].max_version,
+ vgdev->capsets[i].max_size);
+ }
+ vgdev->num_capsets = num_capsets;
+}
+
+int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
+{
+ static vq_callback_t *callbacks[] = {
+ virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack
+ };
+ static const char *names[] = { "control", "cursor" };
+
+ struct virtio_gpu_device *vgdev;
+ /* this will expand later */
+ struct virtqueue *vqs[2];
+ u32 num_scanouts, num_capsets;
+ int ret;
+
+ if (!virtio_has_feature(dev->virtdev, VIRTIO_F_VERSION_1))
+ return -ENODEV;
+
+ vgdev = kzalloc(sizeof(struct virtio_gpu_device), GFP_KERNEL);
+ if (!vgdev)
+ return -ENOMEM;
+
+ vgdev->ddev = dev;
+ dev->dev_private = vgdev;
+ vgdev->vdev = dev->virtdev;
+ vgdev->dev = dev->dev;
+
+ spin_lock_init(&vgdev->display_info_lock);
+ spin_lock_init(&vgdev->ctx_id_idr_lock);
+ idr_init(&vgdev->ctx_id_idr);
+ spin_lock_init(&vgdev->resource_idr_lock);
+ idr_init(&vgdev->resource_idr);
+ init_waitqueue_head(&vgdev->resp_wq);
+ virtio_gpu_init_vq(&vgdev->ctrlq, virtio_gpu_dequeue_ctrl_func);
+ virtio_gpu_init_vq(&vgdev->cursorq, virtio_gpu_dequeue_cursor_func);
+
+ spin_lock_init(&vgdev->fence_drv.lock);
+ INIT_LIST_HEAD(&vgdev->fence_drv.fences);
+ INIT_LIST_HEAD(&vgdev->cap_cache);
+ INIT_WORK(&vgdev->config_changed_work,
+ virtio_gpu_config_changed_work_func);
+
+ if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_VIRGL))
+ vgdev->has_virgl_3d = true;
+ DRM_INFO("virgl 3d acceleration %s\n",
+ vgdev->has_virgl_3d ? "enabled" : "not available");
+
+ ret = vgdev->vdev->config->find_vqs(vgdev->vdev, 2, vqs,
+ callbacks, names);
+ if (ret) {
+ DRM_ERROR("failed to find virt queues\n");
+ goto err_vqs;
+ }
+ vgdev->ctrlq.vq = vqs[0];
+ vgdev->cursorq.vq = vqs[1];
+ ret = virtio_gpu_alloc_vbufs(vgdev);
+ if (ret) {
+ DRM_ERROR("failed to alloc vbufs\n");
+ goto err_vbufs;
+ }
+
+ ret = virtio_gpu_ttm_init(vgdev);
+ if (ret) {
+ DRM_ERROR("failed to init ttm %d\n", ret);
+ goto err_ttm;
+ }
+
+ /* get display info */
+ virtio_cread(vgdev->vdev, struct virtio_gpu_config,
+ num_scanouts, &num_scanouts);
+ vgdev->num_scanouts = min_t(uint32_t, num_scanouts,
+ VIRTIO_GPU_MAX_SCANOUTS);
+ if (!vgdev->num_scanouts) {
+ DRM_ERROR("num_scanouts is zero\n");
+ ret = -EINVAL;
+ goto err_scanouts;
+ }
+ DRM_INFO("number of scanouts: %d\n", num_scanouts);
+
+ virtio_cread(vgdev->vdev, struct virtio_gpu_config,
+ num_capsets, &num_capsets);
+ DRM_INFO("number of cap sets: %d\n", num_capsets);
+
+ ret = virtio_gpu_modeset_init(vgdev);
+ if (ret)
+ goto err_modeset;
+
+ virtio_device_ready(vgdev->vdev);
+ vgdev->vqs_ready = true;
+
+ if (num_capsets)
+ virtio_gpu_get_capsets(vgdev, num_capsets);
+ virtio_gpu_cmd_get_display_info(vgdev);
+ wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending,
+ 5 * HZ);
+ if (virtio_gpu_fbdev)
+ virtio_gpu_fbdev_init(vgdev);
+
+ return 0;
+
+err_modeset:
+err_scanouts:
+ virtio_gpu_ttm_fini(vgdev);
+err_ttm:
+ virtio_gpu_free_vbufs(vgdev);
+err_vbufs:
+ vgdev->vdev->config->del_vqs(vgdev->vdev);
+err_vqs:
+ kfree(vgdev);
+ return ret;
+}
+
+static void virtio_gpu_cleanup_cap_cache(struct virtio_gpu_device *vgdev)
+{
+ struct virtio_gpu_drv_cap_cache *cache_ent, *tmp;
+
+ list_for_each_entry_safe(cache_ent, tmp, &vgdev->cap_cache, head) {
+ kfree(cache_ent->caps_cache);
+ kfree(cache_ent);
+ }
+}
+
+int virtio_gpu_driver_unload(struct drm_device *dev)
+{
+ struct virtio_gpu_device *vgdev = dev->dev_private;
+
+ vgdev->vqs_ready = false;
+ flush_work(&vgdev->ctrlq.dequeue_work);
+ flush_work(&vgdev->cursorq.dequeue_work);
+ flush_work(&vgdev->config_changed_work);
+ vgdev->vdev->config->del_vqs(vgdev->vdev);
+
+ virtio_gpu_modeset_fini(vgdev);
+ virtio_gpu_ttm_fini(vgdev);
+ virtio_gpu_free_vbufs(vgdev);
+ virtio_gpu_cleanup_cap_cache(vgdev);
+ kfree(vgdev->capsets);
+ kfree(vgdev);
+ return 0;
+}
+
+int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file)
+{
+ struct virtio_gpu_device *vgdev = dev->dev_private;
+ struct virtio_gpu_fpriv *vfpriv;
+ uint32_t id;
+ char dbgname[64], tmpname[TASK_COMM_LEN];
+
+ /* can't create contexts without 3d renderer */
+ if (!vgdev->has_virgl_3d)
+ return 0;
+
+ get_task_comm(tmpname, current);
+ snprintf(dbgname, sizeof(dbgname), "%s", tmpname);
+ dbgname[63] = 0;
+ /* allocate a virt GPU context for this opener */
+ vfpriv = kzalloc(sizeof(*vfpriv), GFP_KERNEL);
+ if (!vfpriv)
+ return -ENOMEM;
+
+ virtio_gpu_context_create(vgdev, strlen(dbgname), dbgname, &id);
+
+ vfpriv->ctx_id = id;
+ file->driver_priv = vfpriv;
+ return 0;
+}
+
+void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file)
+{
+ struct virtio_gpu_device *vgdev = dev->dev_private;
+ struct virtio_gpu_fpriv *vfpriv;
+
+ if (!vgdev->has_virgl_3d)
+ return;
+
+ vfpriv = file->driver_priv;
+
+ virtio_gpu_context_destroy(vgdev, vfpriv->ctx_id);
+ kfree(vfpriv);
+ file->driver_priv = NULL;
+}
Code Review / kvmfornfv.git / blobdiff