virtio-gpu: add 3d/virgl support
Add the bits needed for opengl rendering support: query
capabilities, new virtio commands, drm ioctls.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
new file mode 100644
index 0000000..4ef672b
--- /dev/null
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -0,0 +1,573 @@
+/*
+ * 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 <drm/drmP.h>
+#include "virtgpu_drv.h"
+#include <drm/virtgpu_drm.h>
+#include "ttm/ttm_execbuf_util.h"
+
+static void convert_to_hw_box(struct virtio_gpu_box *dst,
+ const struct drm_virtgpu_3d_box *src)
+{
+ dst->x = cpu_to_le32(src->x);
+ dst->y = cpu_to_le32(src->y);
+ dst->z = cpu_to_le32(src->z);
+ dst->w = cpu_to_le32(src->w);
+ dst->h = cpu_to_le32(src->h);
+ dst->d = cpu_to_le32(src->d);
+}
+
+static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct virtio_gpu_device *vgdev = dev->dev_private;
+ struct drm_virtgpu_map *virtio_gpu_map = data;
+
+ return virtio_gpu_mode_dumb_mmap(file_priv, vgdev->ddev,
+ virtio_gpu_map->handle,
+ &virtio_gpu_map->offset);
+}
+
+static int virtio_gpu_object_list_validate(struct ww_acquire_ctx *ticket,
+ struct list_head *head)
+{
+ struct ttm_validate_buffer *buf;
+ struct ttm_buffer_object *bo;
+ struct virtio_gpu_object *qobj;
+ int ret;
+
+ ret = ttm_eu_reserve_buffers(ticket, head, true, NULL);
+ if (ret != 0)
+ return ret;
+
+ list_for_each_entry(buf, head, head) {
+ bo = buf->bo;
+ qobj = container_of(bo, struct virtio_gpu_object, tbo);
+ ret = ttm_bo_validate(bo, &qobj->placement, false, false);
+ if (ret) {
+ ttm_eu_backoff_reservation(ticket, head);
+ return ret;
+ }
+ }
+ return 0;
+}
+
+static void virtio_gpu_unref_list(struct list_head *head)
+{
+ struct ttm_validate_buffer *buf;
+ struct ttm_buffer_object *bo;
+ struct virtio_gpu_object *qobj;
+ list_for_each_entry(buf, head, head) {
+ bo = buf->bo;
+ qobj = container_of(bo, struct virtio_gpu_object, tbo);
+
+ drm_gem_object_unreference_unlocked(&qobj->gem_base);
+ }
+}
+
+static int virtio_gpu_execbuffer(struct drm_device *dev,
+ struct drm_virtgpu_execbuffer *exbuf,
+ struct drm_file *drm_file)
+{
+ struct virtio_gpu_device *vgdev = dev->dev_private;
+ struct virtio_gpu_fpriv *vfpriv = drm_file->driver_priv;
+ struct drm_gem_object *gobj;
+ struct virtio_gpu_fence *fence;
+ struct virtio_gpu_object *qobj;
+ int ret;
+ uint32_t *bo_handles = NULL;
+ void __user *user_bo_handles = NULL;
+ struct list_head validate_list;
+ struct ttm_validate_buffer *buflist = NULL;
+ int i;
+ struct ww_acquire_ctx ticket;
+ void *buf;
+
+ if (vgdev->has_virgl_3d == false)
+ return -ENOSYS;
+
+ INIT_LIST_HEAD(&validate_list);
+ if (exbuf->num_bo_handles) {
+
+ bo_handles = drm_malloc_ab(exbuf->num_bo_handles,
+ sizeof(uint32_t));
+ buflist = drm_calloc_large(exbuf->num_bo_handles,
+ sizeof(struct ttm_validate_buffer));
+ if (!bo_handles || !buflist) {
+ drm_free_large(bo_handles);
+ drm_free_large(buflist);
+ return -ENOMEM;
+ }
+
+ user_bo_handles = (void __user *)(uintptr_t)exbuf->bo_handles;
+ if (copy_from_user(bo_handles, user_bo_handles,
+ exbuf->num_bo_handles * sizeof(uint32_t))) {
+ ret = -EFAULT;
+ drm_free_large(bo_handles);
+ drm_free_large(buflist);
+ return ret;
+ }
+
+ for (i = 0; i < exbuf->num_bo_handles; i++) {
+ gobj = drm_gem_object_lookup(dev,
+ drm_file, bo_handles[i]);
+ if (!gobj) {
+ drm_free_large(bo_handles);
+ drm_free_large(buflist);
+ return -ENOENT;
+ }
+
+ qobj = gem_to_virtio_gpu_obj(gobj);
+ buflist[i].bo = &qobj->tbo;
+
+ list_add(&buflist[i].head, &validate_list);
+ }
+ drm_free_large(bo_handles);
+ }
+
+ ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
+ if (ret)
+ goto out_free;
+
+ buf = kmalloc(exbuf->size, GFP_KERNEL);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto out_unresv;
+ }
+ if (copy_from_user(buf, (void __user *)(uintptr_t)exbuf->command,
+ exbuf->size)) {
+ kfree(buf);
+ ret = -EFAULT;
+ goto out_unresv;
+ }
+ virtio_gpu_cmd_submit(vgdev, buf, exbuf->size,
+ vfpriv->ctx_id, &fence);
+
+ ttm_eu_fence_buffer_objects(&ticket, &validate_list, &fence->f);
+
+ /* fence the command bo */
+ virtio_gpu_unref_list(&validate_list);
+ drm_free_large(buflist);
+ fence_put(&fence->f);
+ return 0;
+
+out_unresv:
+ ttm_eu_backoff_reservation(&ticket, &validate_list);
+out_free:
+ virtio_gpu_unref_list(&validate_list);
+ drm_free_large(buflist);
+ return ret;
+}
+
+/*
+ * Usage of execbuffer:
+ * Relocations need to take into account the full VIRTIO_GPUDrawable size.
+ * However, the command as passed from user space must *not* contain the initial
+ * VIRTIO_GPUReleaseInfo struct (first XXX bytes)
+ */
+static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_virtgpu_execbuffer *execbuffer = data;
+ return virtio_gpu_execbuffer(dev, execbuffer, file_priv);
+}
+
+
+static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ 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 == true ? 1 : 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (copy_to_user((void __user *)(unsigned long)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_priv)
+{
+ struct virtio_gpu_device *vgdev = dev->dev_private;
+ struct drm_virtgpu_resource_create *rc = data;
+ int ret;
+ uint32_t res_id;
+ struct virtio_gpu_object *qobj;
+ struct drm_gem_object *obj;
+ uint32_t handle = 0;
+ uint32_t size;
+ struct list_head validate_list;
+ struct ttm_validate_buffer mainbuf;
+ struct virtio_gpu_fence *fence = NULL;
+ struct ww_acquire_ctx ticket;
+ struct virtio_gpu_resource_create_3d rc_3d;
+
+ if (vgdev->has_virgl_3d == false) {
+ 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;
+ }
+
+ INIT_LIST_HEAD(&validate_list);
+ memset(&mainbuf, 0, sizeof(struct ttm_validate_buffer));
+
+ virtio_gpu_resource_id_get(vgdev, &res_id);
+
+ size = rc->size;
+
+ /* allocate a single page size object */
+ if (size == 0)
+ size = PAGE_SIZE;
+
+ qobj = virtio_gpu_alloc_object(dev, size, false, false);
+ if (IS_ERR(qobj)) {
+ ret = PTR_ERR(qobj);
+ goto fail_id;
+ }
+ obj = &qobj->gem_base;
+
+ if (!vgdev->has_virgl_3d) {
+ virtio_gpu_cmd_create_resource(vgdev, res_id, rc->format,
+ rc->width, rc->height);
+
+ ret = virtio_gpu_object_attach(vgdev, qobj, res_id, NULL);
+ } else {
+ /* use a gem reference since unref list undoes them */
+ drm_gem_object_reference(&qobj->gem_base);
+ mainbuf.bo = &qobj->tbo;
+ list_add(&mainbuf.head, &validate_list);
+
+ ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
+ if (ret) {
+ DRM_DEBUG("failed to validate\n");
+ goto fail_unref;
+ }
+
+ rc_3d.resource_id = cpu_to_le32(res_id);
+ rc_3d.target = cpu_to_le32(rc->target);
+ rc_3d.format = cpu_to_le32(rc->format);
+ rc_3d.bind = cpu_to_le32(rc->bind);
+ rc_3d.width = cpu_to_le32(rc->width);
+ rc_3d.height = cpu_to_le32(rc->height);
+ rc_3d.depth = cpu_to_le32(rc->depth);
+ rc_3d.array_size = cpu_to_le32(rc->array_size);
+ rc_3d.last_level = cpu_to_le32(rc->last_level);
+ rc_3d.nr_samples = cpu_to_le32(rc->nr_samples);
+ rc_3d.flags = cpu_to_le32(rc->flags);
+
+ virtio_gpu_cmd_resource_create_3d(vgdev, &rc_3d, NULL);
+ ret = virtio_gpu_object_attach(vgdev, qobj, res_id, &fence);
+ if (ret) {
+ ttm_eu_backoff_reservation(&ticket, &validate_list);
+ goto fail_unref;
+ }
+ ttm_eu_fence_buffer_objects(&ticket, &validate_list, &fence->f);
+ }
+
+ qobj->hw_res_handle = res_id;
+
+ ret = drm_gem_handle_create(file_priv, obj, &handle);
+ if (ret) {
+
+ drm_gem_object_release(obj);
+ if (vgdev->has_virgl_3d) {
+ virtio_gpu_unref_list(&validate_list);
+ fence_put(&fence->f);
+ }
+ return ret;
+ }
+ drm_gem_object_unreference_unlocked(obj);
+
+ rc->res_handle = res_id; /* similiar to a VM address */
+ rc->bo_handle = handle;
+
+ if (vgdev->has_virgl_3d) {
+ virtio_gpu_unref_list(&validate_list);
+ fence_put(&fence->f);
+ }
+ return 0;
+fail_unref:
+ if (vgdev->has_virgl_3d) {
+ virtio_gpu_unref_list(&validate_list);
+ fence_put(&fence->f);
+ }
+//fail_obj:
+// drm_gem_object_handle_unreference_unlocked(obj);
+fail_id:
+ virtio_gpu_resource_id_put(vgdev, res_id);
+ return ret;
+}
+
+static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_virtgpu_resource_info *ri = data;
+ struct drm_gem_object *gobj = NULL;
+ struct virtio_gpu_object *qobj = NULL;
+
+ gobj = drm_gem_object_lookup(dev, file_priv, ri->bo_handle);
+ if (gobj == NULL)
+ return -ENOENT;
+
+ qobj = gem_to_virtio_gpu_obj(gobj);
+
+ ri->size = qobj->gem_base.size;
+ ri->res_handle = qobj->hw_res_handle;
+ drm_gem_object_unreference_unlocked(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 drm_gem_object *gobj = NULL;
+ struct virtio_gpu_object *qobj = NULL;
+ struct virtio_gpu_fence *fence;
+ int ret;
+ u32 offset = args->offset;
+ struct virtio_gpu_box box;
+
+ if (vgdev->has_virgl_3d == false)
+ return -ENOSYS;
+
+ gobj = drm_gem_object_lookup(dev, file, args->bo_handle);
+ if (gobj == NULL)
+ return -ENOENT;
+
+ qobj = gem_to_virtio_gpu_obj(gobj);
+
+ ret = virtio_gpu_object_reserve(qobj, false);
+ if (ret)
+ goto out;
+
+ ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
+ true, false);
+ if (unlikely(ret))
+ goto out_unres;
+
+ convert_to_hw_box(&box, &args->box);
+ virtio_gpu_cmd_transfer_from_host_3d
+ (vgdev, qobj->hw_res_handle,
+ vfpriv->ctx_id, offset, args->level,
+ &box, &fence);
+ reservation_object_add_excl_fence(qobj->tbo.resv,
+ &fence->f);
+
+ fence_put(&fence->f);
+out_unres:
+ virtio_gpu_object_unreserve(qobj);
+out:
+ drm_gem_object_unreference_unlocked(gobj);
+ 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 drm_gem_object *gobj = NULL;
+ struct virtio_gpu_object *qobj = NULL;
+ struct virtio_gpu_fence *fence;
+ struct virtio_gpu_box box;
+ int ret;
+ u32 offset = args->offset;
+
+ gobj = drm_gem_object_lookup(dev, file, args->bo_handle);
+ if (gobj == NULL)
+ return -ENOENT;
+
+ qobj = gem_to_virtio_gpu_obj(gobj);
+
+ ret = virtio_gpu_object_reserve(qobj, false);
+ if (ret)
+ goto out;
+
+ ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
+ true, false);
+ if (unlikely(ret))
+ goto out_unres;
+
+ convert_to_hw_box(&box, &args->box);
+ if (!vgdev->has_virgl_3d) {
+ virtio_gpu_cmd_transfer_to_host_2d
+ (vgdev, qobj->hw_res_handle, offset,
+ box.w, box.h, box.x, box.y, NULL);
+ } else {
+ virtio_gpu_cmd_transfer_to_host_3d
+ (vgdev, qobj->hw_res_handle,
+ vfpriv ? vfpriv->ctx_id : 0, offset,
+ args->level, &box, &fence);
+ reservation_object_add_excl_fence(qobj->tbo.resv,
+ &fence->f);
+ fence_put(&fence->f);
+ }
+
+out_unres:
+ virtio_gpu_object_unreserve(qobj);
+out:
+ drm_gem_object_unreference_unlocked(gobj);
+ 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 *gobj = NULL;
+ struct virtio_gpu_object *qobj = NULL;
+ int ret;
+ bool nowait = false;
+
+ gobj = drm_gem_object_lookup(dev, file, args->handle);
+ if (gobj == NULL)
+ return -ENOENT;
+
+ qobj = gem_to_virtio_gpu_obj(gobj);
+
+ if (args->flags & VIRTGPU_WAIT_NOWAIT)
+ nowait = true;
+ ret = virtio_gpu_object_wait(qobj, nowait);
+
+ drm_gem_object_unreference_unlocked(gobj);
+ 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;
+ int 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;
+
+ 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;
+ }
+
+ size = vgdev->capsets[found_valid].max_size;
+ if (args->size > size) {
+ spin_unlock(&vgdev->display_info_lock);
+ return -EINVAL;
+ }
+
+ 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) {
+ ptr = cache_ent->caps_cache;
+ spin_unlock(&vgdev->display_info_lock);
+ goto copy_exit;
+ }
+ }
+ spin_unlock(&vgdev->display_info_lock);
+
+ /* not in cache - need to talk to hw */
+ virtio_gpu_cmd_get_capset(vgdev, found_valid, args->cap_set_ver,
+ &cache_ent);
+
+ ret = wait_event_timeout(vgdev->resp_wq,
+ atomic_read(&cache_ent->is_valid), 5 * HZ);
+
+ ptr = cache_ent->caps_cache;
+
+copy_exit:
+ if (copy_to_user((void __user *)(unsigned long)args->addr, ptr, size))
+ return -EFAULT;
+
+ return 0;
+}
+
+struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = {
+ DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl,
+ DRM_AUTH|DRM_UNLOCKED),
+
+ DRM_IOCTL_DEF_DRV(VIRTGPU_EXECBUFFER, virtio_gpu_execbuffer_ioctl,
+ DRM_AUTH|DRM_UNLOCKED),
+
+ DRM_IOCTL_DEF_DRV(VIRTGPU_GETPARAM, virtio_gpu_getparam_ioctl,
+ DRM_AUTH|DRM_UNLOCKED),
+
+ DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE,
+ virtio_gpu_resource_create_ioctl,
+ DRM_AUTH|DRM_UNLOCKED),
+
+ DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_INFO, virtio_gpu_resource_info_ioctl,
+ DRM_AUTH|DRM_UNLOCKED),
+
+ /* 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_AUTH|DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_TO_HOST,
+ virtio_gpu_transfer_to_host_ioctl,
+ DRM_AUTH|DRM_UNLOCKED),
+
+ DRM_IOCTL_DEF_DRV(VIRTGPU_WAIT, virtio_gpu_wait_ioctl,
+ DRM_AUTH|DRM_UNLOCKED),
+
+ DRM_IOCTL_DEF_DRV(VIRTGPU_GET_CAPS, virtio_gpu_get_caps_ioctl,
+ DRM_AUTH|DRM_UNLOCKED),
+};