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![Dave Airlie](/assets/img/avatar_default.png)
This should avoid issues with the fbdev path trying to render before we've gotten the display info. Signed-off-by: Dave Airlie <airlied@redhat.com> [ kraxel: wait for display-info reply ] Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
175 lines
5 KiB
C
175 lines
5 KiB
C
/*
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* Copyright (C) 2015 Red Hat, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/virtio.h>
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#include <linux/virtio_config.h>
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#include <drm/drmP.h>
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#include "virtgpu_drv.h"
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static int virtio_gpu_fbdev = 1;
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MODULE_PARM_DESC(fbdev, "Disable/Enable framebuffer device & console");
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module_param_named(fbdev, virtio_gpu_fbdev, int, 0400);
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static void virtio_gpu_config_changed_work_func(struct work_struct *work)
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{
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struct virtio_gpu_device *vgdev =
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container_of(work, struct virtio_gpu_device,
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config_changed_work);
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u32 events_read, events_clear = 0;
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/* read the config space */
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virtio_cread(vgdev->vdev, struct virtio_gpu_config,
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events_read, &events_read);
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if (events_read & VIRTIO_GPU_EVENT_DISPLAY) {
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virtio_gpu_cmd_get_display_info(vgdev);
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drm_helper_hpd_irq_event(vgdev->ddev);
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events_clear |= VIRTIO_GPU_EVENT_DISPLAY;
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}
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virtio_cwrite(vgdev->vdev, struct virtio_gpu_config,
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events_clear, &events_clear);
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}
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static void virtio_gpu_init_vq(struct virtio_gpu_queue *vgvq,
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void (*work_func)(struct work_struct *work))
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{
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spin_lock_init(&vgvq->qlock);
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init_waitqueue_head(&vgvq->ack_queue);
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INIT_WORK(&vgvq->dequeue_work, work_func);
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}
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int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
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{
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static vq_callback_t *callbacks[] = {
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virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack
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};
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static const char *names[] = { "control", "cursor" };
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struct virtio_gpu_device *vgdev;
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/* this will expand later */
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struct virtqueue *vqs[2];
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u32 num_scanouts;
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int ret;
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if (!virtio_has_feature(dev->virtdev, VIRTIO_F_VERSION_1))
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return -ENODEV;
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vgdev = kzalloc(sizeof(struct virtio_gpu_device), GFP_KERNEL);
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if (!vgdev)
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return -ENOMEM;
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vgdev->ddev = dev;
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dev->dev_private = vgdev;
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vgdev->vdev = dev->virtdev;
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vgdev->dev = dev->dev;
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spin_lock_init(&vgdev->display_info_lock);
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spin_lock_init(&vgdev->ctx_id_idr_lock);
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idr_init(&vgdev->ctx_id_idr);
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spin_lock_init(&vgdev->resource_idr_lock);
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idr_init(&vgdev->resource_idr);
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init_waitqueue_head(&vgdev->resp_wq);
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virtio_gpu_init_vq(&vgdev->ctrlq, virtio_gpu_dequeue_ctrl_func);
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virtio_gpu_init_vq(&vgdev->cursorq, virtio_gpu_dequeue_cursor_func);
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spin_lock_init(&vgdev->fence_drv.lock);
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INIT_LIST_HEAD(&vgdev->fence_drv.fences);
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INIT_WORK(&vgdev->config_changed_work,
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virtio_gpu_config_changed_work_func);
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ret = vgdev->vdev->config->find_vqs(vgdev->vdev, 2, vqs,
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callbacks, names);
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if (ret) {
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DRM_ERROR("failed to find virt queues\n");
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goto err_vqs;
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}
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vgdev->ctrlq.vq = vqs[0];
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vgdev->cursorq.vq = vqs[1];
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ret = virtio_gpu_alloc_vbufs(vgdev);
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if (ret) {
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DRM_ERROR("failed to alloc vbufs\n");
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goto err_vbufs;
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}
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ret = virtio_gpu_ttm_init(vgdev);
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if (ret) {
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DRM_ERROR("failed to init ttm %d\n", ret);
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goto err_ttm;
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}
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/* get display info */
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virtio_cread(vgdev->vdev, struct virtio_gpu_config,
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num_scanouts, &num_scanouts);
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vgdev->num_scanouts = min_t(uint32_t, num_scanouts,
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VIRTIO_GPU_MAX_SCANOUTS);
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if (!vgdev->num_scanouts) {
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DRM_ERROR("num_scanouts is zero\n");
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ret = -EINVAL;
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goto err_scanouts;
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}
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ret = virtio_gpu_modeset_init(vgdev);
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if (ret)
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goto err_modeset;
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virtio_device_ready(vgdev->vdev);
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vgdev->vqs_ready = true;
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virtio_gpu_cmd_get_display_info(vgdev);
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wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending,
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5 * HZ);
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if (virtio_gpu_fbdev)
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virtio_gpu_fbdev_init(vgdev);
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return 0;
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err_modeset:
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err_scanouts:
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virtio_gpu_ttm_fini(vgdev);
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err_ttm:
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virtio_gpu_free_vbufs(vgdev);
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err_vbufs:
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vgdev->vdev->config->del_vqs(vgdev->vdev);
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err_vqs:
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kfree(vgdev);
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return ret;
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}
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int virtio_gpu_driver_unload(struct drm_device *dev)
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{
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struct virtio_gpu_device *vgdev = dev->dev_private;
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vgdev->vqs_ready = false;
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flush_work(&vgdev->ctrlq.dequeue_work);
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flush_work(&vgdev->cursorq.dequeue_work);
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flush_work(&vgdev->config_changed_work);
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vgdev->vdev->config->del_vqs(vgdev->vdev);
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virtio_gpu_modeset_fini(vgdev);
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virtio_gpu_ttm_fini(vgdev);
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virtio_gpu_free_vbufs(vgdev);
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kfree(vgdev);
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return 0;
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}
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