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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/virtio/virtgpu_kms.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_kms.c')
-rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_kms.c | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c new file mode 100644 index 0000000000..5a3b5aaed1 --- /dev/null +++ b/drivers/gpu/drm/virtio/virtgpu_kms.c @@ -0,0 +1,353 @@ +/* + * 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 <linux/virtio_ring.h> + +#include <drm/drm_file.h> +#include <drm/drm_managed.h> + +#include "virtgpu_drv.h" + +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_le(vgdev->vdev, struct virtio_gpu_config, + events_read, &events_read); + if (events_read & VIRTIO_GPU_EVENT_DISPLAY) { + if (vgdev->num_scanouts) { + if (vgdev->has_edid) + virtio_gpu_cmd_get_edids(vgdev); + virtio_gpu_cmd_get_display_info(vgdev); + virtio_gpu_notify(vgdev); + drm_helper_hpd_irq_event(vgdev->ddev); + } + events_clear |= VIRTIO_GPU_EVENT_DISPLAY; + } + virtio_cwrite_le(vgdev->vdev, struct virtio_gpu_config, + events_clear, &events_clear); +} + +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; + bool invalid_capset_id = false; + struct drm_device *drm = vgdev->ddev; + + vgdev->capsets = drmm_kcalloc(drm, 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); + virtio_gpu_notify(vgdev); + ret = wait_event_timeout(vgdev->resp_wq, + vgdev->capsets[i].id > 0, 5 * HZ); + /* + * Capability ids are defined in the virtio-gpu spec and are + * between 1 to 63, inclusive. + */ + if (!vgdev->capsets[i].id || + vgdev->capsets[i].id > MAX_CAPSET_ID) + invalid_capset_id = true; + + if (ret == 0) + DRM_ERROR("timed out waiting for cap set %d\n", i); + else if (invalid_capset_id) + DRM_ERROR("invalid capset id %u", vgdev->capsets[i].id); + + if (ret == 0 || invalid_capset_id) { + spin_lock(&vgdev->display_info_lock); + drmm_kfree(drm, vgdev->capsets); + vgdev->capsets = NULL; + spin_unlock(&vgdev->display_info_lock); + return; + } + + vgdev->capset_id_mask |= 1 << vgdev->capsets[i].id; + 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_init(struct virtio_device *vdev, struct drm_device *dev) +{ + static vq_callback_t *callbacks[] = { + virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack + }; + static const char * const names[] = { "control", "cursor" }; + + struct virtio_gpu_device *vgdev; + /* this will expand later */ + struct virtqueue *vqs[2]; + u32 num_scanouts, num_capsets; + int ret = 0; + + if (!virtio_has_feature(vdev, VIRTIO_F_VERSION_1)) + return -ENODEV; + + vgdev = drmm_kzalloc(dev, sizeof(struct virtio_gpu_device), GFP_KERNEL); + if (!vgdev) + return -ENOMEM; + + vgdev->ddev = dev; + dev->dev_private = vgdev; + vgdev->vdev = vdev; + + spin_lock_init(&vgdev->display_info_lock); + spin_lock_init(&vgdev->resource_export_lock); + spin_lock_init(&vgdev->host_visible_lock); + ida_init(&vgdev->ctx_id_ida); + ida_init(&vgdev->resource_ida); + 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); + + vgdev->fence_drv.context = dma_fence_context_alloc(1); + 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); + + INIT_WORK(&vgdev->obj_free_work, + virtio_gpu_array_put_free_work); + INIT_LIST_HEAD(&vgdev->obj_free_list); + spin_lock_init(&vgdev->obj_free_lock); + +#ifdef __LITTLE_ENDIAN + if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_VIRGL)) + vgdev->has_virgl_3d = true; +#endif + if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_EDID)) { + vgdev->has_edid = true; + } + if (virtio_has_feature(vgdev->vdev, VIRTIO_RING_F_INDIRECT_DESC)) { + vgdev->has_indirect = true; + } + if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_UUID)) { + vgdev->has_resource_assign_uuid = true; + } + if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_BLOB)) { + vgdev->has_resource_blob = true; + } + if (virtio_get_shm_region(vgdev->vdev, &vgdev->host_visible_region, + VIRTIO_GPU_SHM_ID_HOST_VISIBLE)) { + if (!devm_request_mem_region(&vgdev->vdev->dev, + vgdev->host_visible_region.addr, + vgdev->host_visible_region.len, + dev_name(&vgdev->vdev->dev))) { + DRM_ERROR("Could not reserve host visible region\n"); + ret = -EBUSY; + goto err_vqs; + } + + DRM_INFO("Host memory window: 0x%lx +0x%lx\n", + (unsigned long)vgdev->host_visible_region.addr, + (unsigned long)vgdev->host_visible_region.len); + vgdev->has_host_visible = true; + drm_mm_init(&vgdev->host_visible_mm, + (unsigned long)vgdev->host_visible_region.addr, + (unsigned long)vgdev->host_visible_region.len); + } + if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_CONTEXT_INIT)) { + vgdev->has_context_init = true; + } + + DRM_INFO("features: %cvirgl %cedid %cresource_blob %chost_visible", + vgdev->has_virgl_3d ? '+' : '-', + vgdev->has_edid ? '+' : '-', + vgdev->has_resource_blob ? '+' : '-', + vgdev->has_host_visible ? '+' : '-'); + + DRM_INFO("features: %ccontext_init\n", + vgdev->has_context_init ? '+' : '-'); + + ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL); + 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; + } + + /* get display info */ + virtio_cread_le(vgdev->vdev, struct virtio_gpu_config, + num_scanouts, &num_scanouts); + vgdev->num_scanouts = min_t(uint32_t, num_scanouts, + VIRTIO_GPU_MAX_SCANOUTS); + + if (!IS_ENABLED(CONFIG_DRM_VIRTIO_GPU_KMS) || !vgdev->num_scanouts) { + DRM_INFO("KMS disabled\n"); + vgdev->num_scanouts = 0; + vgdev->has_edid = false; + dev->driver_features &= ~(DRIVER_MODESET | DRIVER_ATOMIC); + } else { + DRM_INFO("number of scanouts: %d\n", num_scanouts); + } + + virtio_cread_le(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) { + DRM_ERROR("modeset init failed\n"); + goto err_scanouts; + } + + virtio_device_ready(vgdev->vdev); + + if (num_capsets) + virtio_gpu_get_capsets(vgdev, num_capsets); + if (vgdev->num_scanouts) { + if (vgdev->has_edid) + virtio_gpu_cmd_get_edids(vgdev); + virtio_gpu_cmd_get_display_info(vgdev); + virtio_gpu_notify(vgdev); + wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending, + 5 * HZ); + } + return 0; + +err_scanouts: + virtio_gpu_free_vbufs(vgdev); +err_vbufs: + vgdev->vdev->config->del_vqs(vgdev->vdev); +err_vqs: + dev->dev_private = NULL; + 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); + } +} + +void virtio_gpu_deinit(struct drm_device *dev) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + + flush_work(&vgdev->obj_free_work); + flush_work(&vgdev->ctrlq.dequeue_work); + flush_work(&vgdev->cursorq.dequeue_work); + flush_work(&vgdev->config_changed_work); + virtio_reset_device(vgdev->vdev); + vgdev->vdev->config->del_vqs(vgdev->vdev); +} + +void virtio_gpu_release(struct drm_device *dev) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + + if (!vgdev) + return; + + virtio_gpu_modeset_fini(vgdev); + virtio_gpu_free_vbufs(vgdev); + virtio_gpu_cleanup_cap_cache(vgdev); + + if (vgdev->has_host_visible) + drm_mm_takedown(&vgdev->host_visible_mm); +} + +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; + int handle; + + /* can't create contexts without 3d renderer */ + if (!vgdev->has_virgl_3d) + return 0; + + /* allocate a virt GPU context for this opener */ + vfpriv = kzalloc(sizeof(*vfpriv), GFP_KERNEL); + if (!vfpriv) + return -ENOMEM; + + mutex_init(&vfpriv->context_lock); + + handle = ida_alloc(&vgdev->ctx_id_ida, GFP_KERNEL); + if (handle < 0) { + kfree(vfpriv); + return handle; + } + + vfpriv->ctx_id = handle + 1; + 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 = file->driver_priv; + + if (!vgdev->has_virgl_3d) + return; + + if (vfpriv->context_created) { + virtio_gpu_cmd_context_destroy(vgdev, vfpriv->ctx_id); + virtio_gpu_notify(vgdev); + } + + ida_free(&vgdev->ctx_id_ida, vfpriv->ctx_id - 1); + mutex_destroy(&vfpriv->context_lock); + kfree(vfpriv); + file->driver_priv = NULL; +} |