diff options
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_ioctl.c')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_ioctl.c | 735 |
1 files changed, 735 insertions, 0 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c new file mode 100644 index 000000000000..c33c057365f8 --- /dev/null +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -0,0 +1,735 @@ +/* + * Copyright (C) 2015 Red Hat, Inc. + * All Rights Reserved. + * + * Authors: + * Dave Airlie + * Alon Levy + * + * 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 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 HOLDER(S) OR AUTHOR(S) 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/file.h> +#include <linux/sync_file.h> +#include <linux/uaccess.h> + +#include <drm/drm_file.h> +#include <drm/virtgpu_drm.h> + +#include "virtgpu_drv.h" + +#define VIRTGPU_BLOB_FLAG_USE_MASK (VIRTGPU_BLOB_FLAG_USE_MAPPABLE | \ + VIRTGPU_BLOB_FLAG_USE_SHAREABLE | \ + VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE) + +/* Must be called with &virtio_gpu_fpriv.struct_mutex held. */ +static void virtio_gpu_create_context_locked(struct virtio_gpu_device *vgdev, + struct virtio_gpu_fpriv *vfpriv) +{ + if (vfpriv->explicit_debug_name) { + virtio_gpu_cmd_context_create(vgdev, vfpriv->ctx_id, + vfpriv->context_init, + strlen(vfpriv->debug_name), + vfpriv->debug_name); + } else { + char dbgname[TASK_COMM_LEN]; + + get_task_comm(dbgname, current); + virtio_gpu_cmd_context_create(vgdev, vfpriv->ctx_id, + vfpriv->context_init, strlen(dbgname), + dbgname); + } + + vfpriv->context_created = true; +} + +void virtio_gpu_create_context(struct drm_device *dev, struct drm_file *file) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + struct virtio_gpu_fpriv *vfpriv = file->driver_priv; + + mutex_lock(&vfpriv->context_lock); + if (vfpriv->context_created) + goto out_unlock; + + virtio_gpu_create_context_locked(vgdev, vfpriv); + +out_unlock: + mutex_unlock(&vfpriv->context_lock); +} + +static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + struct drm_virtgpu_map *virtio_gpu_map = data; + + return drm_gem_dumb_map_offset(file, vgdev->ddev, + virtio_gpu_map->handle, + &virtio_gpu_map->offset); +} + +static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + struct drm_virtgpu_getparam *param = data; + int value; + + switch (param->param) { + case VIRTGPU_PARAM_3D_FEATURES: + value = vgdev->has_virgl_3d ? 1 : 0; + break; + case VIRTGPU_PARAM_CAPSET_QUERY_FIX: + value = 1; + break; + case VIRTGPU_PARAM_RESOURCE_BLOB: + value = vgdev->has_resource_blob ? 1 : 0; + break; + case VIRTGPU_PARAM_HOST_VISIBLE: + value = vgdev->has_host_visible ? 1 : 0; + break; + case VIRTGPU_PARAM_CROSS_DEVICE: + value = vgdev->has_resource_assign_uuid ? 1 : 0; + break; + case VIRTGPU_PARAM_CONTEXT_INIT: + value = vgdev->has_context_init ? 1 : 0; + break; + case VIRTGPU_PARAM_SUPPORTED_CAPSET_IDs: + value = vgdev->capset_id_mask; + break; + case VIRTGPU_PARAM_EXPLICIT_DEBUG_NAME: + value = vgdev->has_context_init ? 1 : 0; + break; + default: + return -EINVAL; + } + if (copy_to_user(u64_to_user_ptr(param->value), &value, sizeof(int))) + return -EFAULT; + + return 0; +} + +static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + struct drm_virtgpu_resource_create *rc = data; + struct virtio_gpu_fence *fence; + int ret; + struct virtio_gpu_object *qobj; + struct drm_gem_object *obj; + uint32_t handle = 0; + struct virtio_gpu_object_params params = { 0 }; + + if (vgdev->has_virgl_3d) { + virtio_gpu_create_context(dev, file); + params.virgl = true; + params.target = rc->target; + params.bind = rc->bind; + params.depth = rc->depth; + params.array_size = rc->array_size; + params.last_level = rc->last_level; + params.nr_samples = rc->nr_samples; + params.flags = rc->flags; + } else { + if (rc->depth > 1) + return -EINVAL; + if (rc->nr_samples > 1) + return -EINVAL; + if (rc->last_level > 1) + return -EINVAL; + if (rc->target != 2) + return -EINVAL; + if (rc->array_size > 1) + return -EINVAL; + } + + params.format = rc->format; + params.width = rc->width; + params.height = rc->height; + params.size = rc->size; + /* allocate a single page size object */ + if (params.size == 0) + params.size = PAGE_SIZE; + + fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, 0); + if (!fence) + return -ENOMEM; + ret = virtio_gpu_object_create(vgdev, ¶ms, &qobj, fence); + dma_fence_put(&fence->f); + if (ret < 0) + return ret; + obj = &qobj->base.base; + + ret = drm_gem_handle_create(file, obj, &handle); + if (ret) { + drm_gem_object_release(obj); + return ret; + } + + rc->res_handle = qobj->hw_res_handle; /* similiar to a VM address */ + rc->bo_handle = handle; + + /* + * The handle owns the reference now. But we must drop our + * remaining reference *after* we no longer need to dereference + * the obj. Otherwise userspace could guess the handle and + * race closing it from another thread. + */ + drm_gem_object_put(obj); + + return 0; +} + +static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct drm_virtgpu_resource_info *ri = data; + struct drm_gem_object *gobj = NULL; + struct virtio_gpu_object *qobj = NULL; + + gobj = drm_gem_object_lookup(file, ri->bo_handle); + if (gobj == NULL) + return -ENOENT; + + qobj = gem_to_virtio_gpu_obj(gobj); + + ri->size = qobj->base.base.size; + ri->res_handle = qobj->hw_res_handle; + if (qobj->host3d_blob || qobj->guest_blob) + ri->blob_mem = qobj->blob_mem; + + drm_gem_object_put(gobj); + return 0; +} + +static int virtio_gpu_transfer_from_host_ioctl(struct drm_device *dev, + void *data, + struct drm_file *file) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + struct virtio_gpu_fpriv *vfpriv = file->driver_priv; + struct drm_virtgpu_3d_transfer_from_host *args = data; + struct virtio_gpu_object *bo; + struct virtio_gpu_object_array *objs; + struct virtio_gpu_fence *fence; + int ret; + u32 offset = args->offset; + + if (vgdev->has_virgl_3d == false) + return -ENOSYS; + + virtio_gpu_create_context(dev, file); + objs = virtio_gpu_array_from_handles(file, &args->bo_handle, 1); + if (objs == NULL) + return -ENOENT; + + bo = gem_to_virtio_gpu_obj(objs->objs[0]); + if (bo->guest_blob && !bo->host3d_blob) { + ret = -EINVAL; + goto err_put_free; + } + + if (!bo->host3d_blob && (args->stride || args->layer_stride)) { + ret = -EINVAL; + goto err_put_free; + } + + ret = virtio_gpu_array_lock_resv(objs); + if (ret != 0) + goto err_put_free; + + fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, 0); + if (!fence) { + ret = -ENOMEM; + goto err_unlock; + } + + virtio_gpu_cmd_transfer_from_host_3d + (vgdev, vfpriv->ctx_id, offset, args->level, args->stride, + args->layer_stride, &args->box, objs, fence); + dma_fence_put(&fence->f); + virtio_gpu_notify(vgdev); + return 0; + +err_unlock: + virtio_gpu_array_unlock_resv(objs); +err_put_free: + virtio_gpu_array_put_free(objs); + return ret; +} + +static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + struct virtio_gpu_fpriv *vfpriv = file->driver_priv; + struct drm_virtgpu_3d_transfer_to_host *args = data; + struct virtio_gpu_object *bo; + struct virtio_gpu_object_array *objs; + struct virtio_gpu_fence *fence; + int ret; + u32 offset = args->offset; + + objs = virtio_gpu_array_from_handles(file, &args->bo_handle, 1); + if (objs == NULL) + return -ENOENT; + + bo = gem_to_virtio_gpu_obj(objs->objs[0]); + if (bo->guest_blob && !bo->host3d_blob) { + ret = -EINVAL; + goto err_put_free; + } + + if (!vgdev->has_virgl_3d) { + virtio_gpu_cmd_transfer_to_host_2d + (vgdev, offset, + args->box.w, args->box.h, args->box.x, args->box.y, + objs, NULL); + } else { + virtio_gpu_create_context(dev, file); + + if (!bo->host3d_blob && (args->stride || args->layer_stride)) { + ret = -EINVAL; + goto err_put_free; + } + + ret = virtio_gpu_array_lock_resv(objs); + if (ret != 0) + goto err_put_free; + + ret = -ENOMEM; + fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, + 0); + if (!fence) + goto err_unlock; + + virtio_gpu_cmd_transfer_to_host_3d + (vgdev, + vfpriv ? vfpriv->ctx_id : 0, offset, args->level, + args->stride, args->layer_stride, &args->box, objs, + fence); + dma_fence_put(&fence->f); + } + virtio_gpu_notify(vgdev); + return 0; + +err_unlock: + virtio_gpu_array_unlock_resv(objs); +err_put_free: + virtio_gpu_array_put_free(objs); + return ret; +} + +static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct drm_virtgpu_3d_wait *args = data; + struct drm_gem_object *obj; + long timeout = 15 * HZ; + int ret; + + obj = drm_gem_object_lookup(file, args->handle); + if (obj == NULL) + return -ENOENT; + + if (args->flags & VIRTGPU_WAIT_NOWAIT) { + ret = dma_resv_test_signaled(obj->resv, DMA_RESV_USAGE_READ); + } else { + ret = dma_resv_wait_timeout(obj->resv, DMA_RESV_USAGE_READ, + true, timeout); + } + if (ret == 0) + ret = -EBUSY; + else if (ret > 0) + ret = 0; + + drm_gem_object_put(obj); + return ret; +} + +static int virtio_gpu_get_caps_ioctl(struct drm_device *dev, + void *data, struct drm_file *file) +{ + struct virtio_gpu_device *vgdev = dev->dev_private; + struct drm_virtgpu_get_caps *args = data; + unsigned size, host_caps_size; + int i; + int found_valid = -1; + int ret; + struct virtio_gpu_drv_cap_cache *cache_ent; + void *ptr; + + if (vgdev->num_capsets == 0) + return -ENOSYS; + + /* don't allow userspace to pass 0 */ + if (args->size == 0) + return -EINVAL; + + spin_lock(&vgdev->display_info_lock); + for (i = 0; i < vgdev->num_capsets; i++) { + if (vgdev->capsets[i].id == args->cap_set_id) { + if (vgdev->capsets[i].max_version >= args->cap_set_ver) { + found_valid = i; + break; + } + } + } + + if (found_valid == -1) { + spin_unlock(&vgdev->display_info_lock); + return -EINVAL; + } + + host_caps_size = vgdev->capsets[found_valid].max_size; + /* only copy to user the minimum of the host caps size or the guest caps size */ + size = min(args->size, host_caps_size); + + list_for_each_entry(cache_ent, &vgdev->cap_cache, head) { + if (cache_ent->id == args->cap_set_id && + cache_ent->version == args->cap_set_ver) { + spin_unlock(&vgdev->display_info_lock); + goto copy_exit; + } + } + spin_unlock(&vgdev->display_info_lock); + + /* not in cache - need to talk to hw */ + ret = virtio_gpu_cmd_get_capset(vgdev, found_valid, args->cap_set_ver, + &cache_ent); + if (ret) + return ret; + virtio_gpu_notify(vgdev); + +copy_exit: + ret = wait_event_timeout(vgdev->resp_wq, + atomic_read(&cache_ent->is_valid), 5 * HZ); + if (!ret) + return -EBUSY; + + /* is_valid check must proceed before copy of the cache entry. */ + smp_rmb(); + + ptr = cache_ent->caps_cache; + + if (copy_to_user(u64_to_user_ptr(args->addr), ptr, size)) + return -EFAULT; + + return 0; +} + +static int verify_blob(struct virtio_gpu_device *vgdev, + struct virtio_gpu_fpriv *vfpriv, + struct virtio_gpu_object_params *params, + struct drm_virtgpu_resource_create_blob *rc_blob, + bool *guest_blob, bool *host3d_blob) +{ + if (!vgdev->has_resource_blob) + return -EINVAL; + + if (rc_blob->blob_flags & ~VIRTGPU_BLOB_FLAG_USE_MASK) + return -EINVAL; + + if (rc_blob->blob_flags & VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE) { + if (!vgdev->has_resource_assign_uuid) + return -EINVAL; + } + + switch (rc_blob->blob_mem) { + case VIRTGPU_BLOB_MEM_GUEST: + *guest_blob = true; + break; + case VIRTGPU_BLOB_MEM_HOST3D_GUEST: + *guest_blob = true; + fallthrough; + case VIRTGPU_BLOB_MEM_HOST3D: + *host3d_blob = true; + break; + default: + return -EINVAL; + } + + if (*host3d_blob) { + if (!vgdev->has_virgl_3d) + return -EINVAL; + + /* Must be dword aligned. */ + if (rc_blob->cmd_size % 4 != 0) + return -EINVAL; + + params->ctx_id = vfpriv->ctx_id; + params->blob_id = rc_blob->blob_id; + } else { + if (rc_blob->blob_id != 0) + return -EINVAL; + + if (rc_blob->cmd_size != 0) + return -EINVAL; + } + + params->blob_mem = rc_blob->blob_mem; + params->size = rc_blob->size; + params->blob = true; + params->blob_flags = rc_blob->blob_flags; + return 0; +} + +static int virtio_gpu_resource_create_blob_ioctl(struct drm_device *dev, + void *data, + struct drm_file *file) +{ + int ret = 0; + uint32_t handle = 0; + bool guest_blob = false; + bool host3d_blob = false; + struct drm_gem_object *obj; + struct virtio_gpu_object *bo; + struct virtio_gpu_object_params params = { 0 }; + struct virtio_gpu_device *vgdev = dev->dev_private; + struct virtio_gpu_fpriv *vfpriv = file->driver_priv; + struct drm_virtgpu_resource_create_blob *rc_blob = data; + + if (verify_blob(vgdev, vfpriv, ¶ms, rc_blob, + &guest_blob, &host3d_blob)) + return -EINVAL; + + if (vgdev->has_virgl_3d) + virtio_gpu_create_context(dev, file); + + if (rc_blob->cmd_size) { + void *buf; + + buf = memdup_user(u64_to_user_ptr(rc_blob->cmd), + rc_blob->cmd_size); + + if (IS_ERR(buf)) + return PTR_ERR(buf); + + virtio_gpu_cmd_submit(vgdev, buf, rc_blob->cmd_size, + vfpriv->ctx_id, NULL, NULL); + } + + if (guest_blob) + ret = virtio_gpu_object_create(vgdev, ¶ms, &bo, NULL); + else if (!guest_blob && host3d_blob) + ret = virtio_gpu_vram_create(vgdev, ¶ms, &bo); + else + return -EINVAL; + + if (ret < 0) + return ret; + + bo->guest_blob = guest_blob; + bo->host3d_blob = host3d_blob; + bo->blob_mem = rc_blob->blob_mem; + bo->blob_flags = rc_blob->blob_flags; + + obj = &bo->base.base; + if (params.blob_flags & VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE) { + ret = virtio_gpu_resource_assign_uuid(vgdev, bo); + if (ret) { + drm_gem_object_release(obj); + return ret; + } + } + + ret = drm_gem_handle_create(file, obj, &handle); + if (ret) { + drm_gem_object_release(obj); + return ret; + } + + rc_blob->res_handle = bo->hw_res_handle; + rc_blob->bo_handle = handle; + + /* + * The handle owns the reference now. But we must drop our + * remaining reference *after* we no longer need to dereference + * the obj. Otherwise userspace could guess the handle and + * race closing it from another thread. + */ + drm_gem_object_put(obj); + + return 0; +} + +static int virtio_gpu_context_init_ioctl(struct drm_device *dev, + void *data, struct drm_file *file) +{ + int ret = 0; + uint32_t num_params, i; + uint64_t valid_ring_mask, param, value; + size_t len; + struct drm_virtgpu_context_set_param *ctx_set_params = NULL; + struct virtio_gpu_device *vgdev = dev->dev_private; + struct virtio_gpu_fpriv *vfpriv = file->driver_priv; + struct drm_virtgpu_context_init *args = data; + + num_params = args->num_params; + len = num_params * sizeof(struct drm_virtgpu_context_set_param); + + if (!vgdev->has_context_init || !vgdev->has_virgl_3d) + return -EINVAL; + + /* Number of unique parameters supported at this time. */ + if (num_params > 4) + return -EINVAL; + + ctx_set_params = memdup_user(u64_to_user_ptr(args->ctx_set_params), + len); + + if (IS_ERR(ctx_set_params)) + return PTR_ERR(ctx_set_params); + + mutex_lock(&vfpriv->context_lock); + if (vfpriv->context_created) { + ret = -EEXIST; + goto out_unlock; + } + + for (i = 0; i < num_params; i++) { + param = ctx_set_params[i].param; + value = ctx_set_params[i].value; + + switch (param) { + case VIRTGPU_CONTEXT_PARAM_CAPSET_ID: + if (value > MAX_CAPSET_ID) { + ret = -EINVAL; + goto out_unlock; + } + + if ((vgdev->capset_id_mask & (1ULL << value)) == 0) { + ret = -EINVAL; + goto out_unlock; + } + + /* Context capset ID already set */ + if (vfpriv->context_init & + VIRTIO_GPU_CONTEXT_INIT_CAPSET_ID_MASK) { + ret = -EINVAL; + goto out_unlock; + } + + vfpriv->context_init |= value; + break; + case VIRTGPU_CONTEXT_PARAM_NUM_RINGS: + if (vfpriv->base_fence_ctx) { + ret = -EINVAL; + goto out_unlock; + } + + if (value > MAX_RINGS) { + ret = -EINVAL; + goto out_unlock; + } + + vfpriv->base_fence_ctx = dma_fence_context_alloc(value); + vfpriv->num_rings = value; + break; + case VIRTGPU_CONTEXT_PARAM_POLL_RINGS_MASK: + if (vfpriv->ring_idx_mask) { + ret = -EINVAL; + goto out_unlock; + } + + vfpriv->ring_idx_mask = value; + break; + case VIRTGPU_CONTEXT_PARAM_DEBUG_NAME: + if (vfpriv->explicit_debug_name) { + ret = -EINVAL; + goto out_unlock; + } + + ret = strncpy_from_user(vfpriv->debug_name, + u64_to_user_ptr(value), + DEBUG_NAME_MAX_LEN - 1); + if (ret < 0) + goto out_unlock; + + vfpriv->explicit_debug_name = true; + ret = 0; + break; + default: + ret = -EINVAL; + goto out_unlock; + } + } + + if (vfpriv->ring_idx_mask) { + valid_ring_mask = 0; + for (i = 0; i < vfpriv->num_rings; i++) + valid_ring_mask |= 1ULL << i; + + if (~valid_ring_mask & vfpriv->ring_idx_mask) { + ret = -EINVAL; + goto out_unlock; + } + } + + virtio_gpu_create_context_locked(vgdev, vfpriv); + virtio_gpu_notify(vgdev); + +out_unlock: + mutex_unlock(&vfpriv->context_lock); + kfree(ctx_set_params); + return ret; +} + +struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = { + DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl, + DRM_RENDER_ALLOW), + + DRM_IOCTL_DEF_DRV(VIRTGPU_EXECBUFFER, virtio_gpu_execbuffer_ioctl, + DRM_RENDER_ALLOW), + + DRM_IOCTL_DEF_DRV(VIRTGPU_GETPARAM, virtio_gpu_getparam_ioctl, + DRM_RENDER_ALLOW), + + DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE, + virtio_gpu_resource_create_ioctl, + DRM_RENDER_ALLOW), + + DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_INFO, virtio_gpu_resource_info_ioctl, + DRM_RENDER_ALLOW), + + /* make transfer async to the main ring? - no sure, can we + * thread these in the underlying GL + */ + DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_FROM_HOST, + virtio_gpu_transfer_from_host_ioctl, + DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_TO_HOST, + virtio_gpu_transfer_to_host_ioctl, + DRM_RENDER_ALLOW), + + DRM_IOCTL_DEF_DRV(VIRTGPU_WAIT, virtio_gpu_wait_ioctl, + DRM_RENDER_ALLOW), + + DRM_IOCTL_DEF_DRV(VIRTGPU_GET_CAPS, virtio_gpu_get_caps_ioctl, + DRM_RENDER_ALLOW), + + DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE_BLOB, + virtio_gpu_resource_create_blob_ioctl, + DRM_RENDER_ALLOW), + + DRM_IOCTL_DEF_DRV(VIRTGPU_CONTEXT_INIT, virtio_gpu_context_init_ioctl, + DRM_RENDER_ALLOW), +}; |