* [PATCH 1/2] virtio: add dma-buf support for exported objects
2020-02-19 8:06 [PATCH 0/2] Support virtio cross-device resources David Stevens
@ 2020-02-19 8:06 ` David Stevens
2020-02-25 6:10 ` Gerd Hoffmann
2020-02-19 8:06 ` [PATCH 2/2] drm/virtio: Support virtgpu exported resources David Stevens
1 sibling, 1 reply; 7+ messages in thread
From: David Stevens @ 2020-02-19 8:06 UTC (permalink / raw)
To: Gerd Hoffmann, David Airlie
Cc: Daniel Vetter, Michael S . Tsirkin, Jason Wang, Sumit Semwal,
David Stevens, linux-kernel, dri-devel, virtualization,
linux-media, linaro-mm-sig, virtio-dev
This change adds a new flavor of dma-bufs that can be used by virtio
drivers to share exported objects. A virtio dma-buf can be queried by
virtio drivers to obtain the UUID which identifies the underlying
exported object.
Signed-off-by: David Stevens <stevensd@chromium.org>
---
drivers/virtio/Makefile | 2 +-
drivers/virtio/virtio.c | 6 ++
drivers/virtio/virtio_dma_buf.c | 97 +++++++++++++++++++++++++++++++++
include/linux/virtio.h | 1 +
include/linux/virtio_dma_buf.h | 62 +++++++++++++++++++++
5 files changed, 167 insertions(+), 1 deletion(-)
create mode 100644 drivers/virtio/virtio_dma_buf.c
create mode 100644 include/linux/virtio_dma_buf.h
diff --git a/drivers/virtio/Makefile b/drivers/virtio/Makefile
index 3a2b5c5dcf46..0ad30f4cdb9f 100644
--- a/drivers/virtio/Makefile
+++ b/drivers/virtio/Makefile
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_VIRTIO) += virtio.o virtio_ring.o
+obj-$(CONFIG_VIRTIO) += virtio.o virtio_ring.o virtio_dma_buf.o
obj-$(CONFIG_VIRTIO_MMIO) += virtio_mmio.o
obj-$(CONFIG_VIRTIO_PCI) += virtio_pci.o
virtio_pci-y := virtio_pci_modern.o virtio_pci_common.o
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index a977e32a88f2..5d46f0ded92d 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -357,6 +357,12 @@ int register_virtio_device(struct virtio_device *dev)
}
EXPORT_SYMBOL_GPL(register_virtio_device);
+bool is_virtio_device(struct device *dev)
+{
+ return dev->bus == &virtio_bus;
+}
+EXPORT_SYMBOL_GPL(is_virtio_device);
+
void unregister_virtio_device(struct virtio_device *dev)
{
int index = dev->index; /* save for after device release */
diff --git a/drivers/virtio/virtio_dma_buf.c b/drivers/virtio/virtio_dma_buf.c
new file mode 100644
index 000000000000..1f7e2d50b189
--- /dev/null
+++ b/drivers/virtio/virtio_dma_buf.c
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * dma-bufs for virtio exported objects
+ *
+ * Copyright (C) 2020 Google, Inc.
+ */
+
+#include <linux/virtio_dma_buf.h>
+
+/**
+ * virtio_dma_buf_export - Creates a new dma-buf for a virtio exported object
+ *
+ * This wraps dma_buf_export() to allow virtio drivers to create a dma-buf
+ * for an virtio exported object that can be queried by other virtio drivers
+ * for the object's UUID.
+ */
+struct dma_buf *virtio_dma_buf_export(
+ const struct virtio_dma_buf_export_info *virtio_exp_info)
+{
+ struct dma_buf_export_info exp_info;
+
+ if (!virtio_exp_info->ops
+ || virtio_exp_info->ops->ops.attach != &virtio_dma_buf_attach
+ || !virtio_exp_info->ops->get_uuid) {
+ return ERR_PTR(-EINVAL);
+ }
+
+ exp_info.exp_name = virtio_exp_info->exp_name;
+ exp_info.owner = virtio_exp_info->owner;
+ exp_info.ops = &virtio_exp_info->ops->ops;
+ exp_info.size = virtio_exp_info->size;
+ exp_info.flags = virtio_exp_info->flags;
+ exp_info.resv = virtio_exp_info->resv;
+ exp_info.priv = virtio_exp_info->priv;
+ BUILD_BUG_ON(sizeof(struct virtio_dma_buf_export_info)
+ != sizeof(struct dma_buf_export_info));
+
+ return dma_buf_export(&exp_info);
+}
+EXPORT_SYMBOL(virtio_dma_buf_export);
+
+/**
+ * virtio_dma_buf_attach - mandatory attach callback for virtio dma-bufs
+ */
+int virtio_dma_buf_attach(struct dma_buf *dma_buf,
+ struct dma_buf_attachment *attach)
+{
+ int ret;
+ const struct virtio_dma_buf_ops *ops = container_of(
+ dma_buf->ops, const struct virtio_dma_buf_ops, ops);
+
+ if (ops->virtio_attach && is_virtio_device(attach->dev)) {
+ ret = ops->virtio_attach(dma_buf, attach);
+ if (ret)
+ return ret;
+ }
+
+ if (ops->device_attach) {
+ ret = ops->device_attach(dma_buf, attach);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(virtio_dma_buf_attach);
+
+/**
+ * is_virtio_dma_buf - returns true if the given dma-buf is a virtio dma-buf
+ * @dma_buf: buffer to query
+ */
+bool is_virtio_dma_buf(struct dma_buf *dma_buf)
+{
+ return dma_buf->ops->attach == &virtio_dma_buf_attach;
+}
+EXPORT_SYMBOL(is_virtio_dma_buf);
+
+/**
+ * get_virtio_dma_buf_uuid - gets the uuid for the dma-buf's exported object
+ * @dma_buf: [in] buffer to query
+ * @uuid: [out] the uuid
+ *
+ * This function should only be called on dma_bufs attached to a virtio device.
+ *
+ * Returns: 0 on success, negative on failure.
+ */
+int get_virtio_dma_buf_uuid(struct dma_buf *dma_buf,
+ uuid_t *uuid)
+{
+ const struct virtio_dma_buf_ops *ops = container_of(
+ dma_buf->ops, const struct virtio_dma_buf_ops, ops);
+
+ if (!is_virtio_dma_buf(dma_buf))
+ return -EINVAL;
+
+ return ops->get_uuid(dma_buf, uuid);
+}
+EXPORT_SYMBOL(get_virtio_dma_buf_uuid);
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 15f906e4a748..9397e25616c4 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -128,6 +128,7 @@ static inline struct virtio_device *dev_to_virtio(struct device *_dev)
void virtio_add_status(struct virtio_device *dev, unsigned int status);
int register_virtio_device(struct virtio_device *dev);
void unregister_virtio_device(struct virtio_device *dev);
+bool is_virtio_device(struct device *dev);
void virtio_break_device(struct virtio_device *dev);
diff --git a/include/linux/virtio_dma_buf.h b/include/linux/virtio_dma_buf.h
new file mode 100644
index 000000000000..d841a9115876
--- /dev/null
+++ b/include/linux/virtio_dma_buf.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * dma-bufs for virtio exported objects
+ *
+ * Copyright (C) 2020 Google, Inc.
+ */
+
+#ifndef _LINUX_VIRTIO_DMA_BUF_H
+#define _LINUX_VIRTIO_DMA_BUF_H
+
+#include <linux/dma-buf.h>
+#include <linux/uuid.h>
+#include <linux/virtio.h>
+
+/**
+ * struct virtio_dma_buf_ops - operations possible on exported object dma-buf
+ * @ops: the base dma_buf_ops. ops.attach MUST be virtio_dma_buf_attach.
+ * @virtio_attach: [optional] callback invoked by virtio_dma_buf_attach if
+ * the attaching device is a virtio device.
+ * @device_attach: [optional] callback invoked by virtio_dma_buf_attach during
+ * all attach operations.
+ * @get_uid: [required] callback to get the uuid of the exported object.
+ */
+struct virtio_dma_buf_ops {
+ struct dma_buf_ops ops;
+ int (*virtio_attach)(struct dma_buf *dma_buf,
+ struct dma_buf_attachment *attach);
+ int (*device_attach)(struct dma_buf *dma_buf,
+ struct dma_buf_attachment *attach);
+ int (*get_uuid)(struct dma_buf *dma_buf, uuid_t *uuid);
+};
+
+/**
+ * struct virtio_dma_buf_export_info - see struct dma_buf_export_info
+ */
+struct virtio_dma_buf_export_info {
+ const char *exp_name;
+ struct module *owner;
+ const struct virtio_dma_buf_ops *ops;
+ size_t size;
+ int flags;
+ struct dma_resv *resv;
+ void *priv;
+};
+
+/**
+ * DEFINE_VIRTIO_DMA_BUF_EXPORT_INFO - helper macro for exporters
+ */
+#define DEFINE_VIRTIO_DMA_BUF_EXPORT_INFO(name) \
+ struct virtio_dma_buf_export_info name = { \
+ .exp_name = KBUILD_MODNAME, \
+ .owner = THIS_MODULE }
+
+int virtio_dma_buf_attach(struct dma_buf *dma_buf,
+ struct dma_buf_attachment *attach);
+
+struct dma_buf *virtio_dma_buf_export(
+ const struct virtio_dma_buf_export_info *virtio_exp_info);
+bool is_virtio_dma_buf(struct dma_buf *dma_buf);
+int get_virtio_dma_buf_uuid(struct dma_buf *dma_buf, uuid_t *uuid);
+
+#endif /* _LINUX_VIRTIO_DMA_BUF_H */
--
2.25.0.265.gbab2e86ba0-goog
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH 2/2] drm/virtio: Support virtgpu exported resources
2020-02-19 8:06 [PATCH 0/2] Support virtio cross-device resources David Stevens
2020-02-19 8:06 ` [PATCH 1/2] virtio: add dma-buf support for exported objects David Stevens
@ 2020-02-19 8:06 ` David Stevens
2020-02-25 6:15 ` Gerd Hoffmann
1 sibling, 1 reply; 7+ messages in thread
From: David Stevens @ 2020-02-19 8:06 UTC (permalink / raw)
To: Gerd Hoffmann, David Airlie
Cc: Daniel Vetter, Michael S . Tsirkin, Jason Wang, Sumit Semwal,
David Stevens, linux-kernel, dri-devel, virtualization,
linux-media, linaro-mm-sig, virtio-dev
Add support for exported resources to virtgpu. This includes adding
support for the new virtgpu command as well as well as switching from
regular prime dma-bufs to virtio dma-bufs.
Signed-off-by: David Stevens <stevensd@chromium.org>
---
drivers/gpu/drm/virtio/virtgpu_drv.c | 3 +
drivers/gpu/drm/virtio/virtgpu_drv.h | 21 +++++
drivers/gpu/drm/virtio/virtgpu_kms.c | 4 +
drivers/gpu/drm/virtio/virtgpu_prime.c | 109 ++++++++++++++++++++++++-
drivers/gpu/drm/virtio/virtgpu_vq.c | 58 +++++++++++++
include/uapi/linux/virtio_gpu.h | 19 +++++
6 files changed, 211 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c
index ab4bed78e656..538ed981fea9 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.c
@@ -165,6 +165,7 @@ static unsigned int features[] = {
VIRTIO_GPU_F_VIRGL,
#endif
VIRTIO_GPU_F_EDID,
+ VIRTIO_GPU_F_CROSS_DEVICE,
};
static struct virtio_driver virtio_gpu_driver = {
.feature_table = features,
@@ -201,6 +202,8 @@ static struct drm_driver driver = {
#endif
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+ .gem_prime_export = virtgpu_gem_prime_export,
+ .gem_prime_import = virtgpu_gem_prime_import,
.gem_prime_mmap = drm_gem_prime_mmap,
.gem_prime_import_sg_table = virtgpu_gem_prime_import_sg_table,
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index af9403e1cf78..0d272fc26bf2 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -27,6 +27,7 @@
#define VIRTIO_DRV_H
#include <linux/virtio.h>
+#include <linux/virtio_dma_buf.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_config.h>
#include <linux/virtio_gpu.h>
@@ -49,6 +50,11 @@
#define DRIVER_MINOR 1
#define DRIVER_PATCHLEVEL 0
+#define UUID_NOT_INITIALIZED 0
+#define UUID_INITIALIZING 1
+#define UUID_INITIALIZED 2
+#define UUID_INITIALIZATION_FAILED 3
+
struct virtio_gpu_object_params {
uint32_t format;
uint32_t width;
@@ -75,6 +81,9 @@ struct virtio_gpu_object {
bool dumb;
bool created;
+
+ int uuid_state;
+ uuid_t uuid;
};
#define gem_to_virtio_gpu_obj(gobj) \
container_of((gobj), struct virtio_gpu_object, base.base)
@@ -196,6 +205,7 @@ struct virtio_gpu_device {
bool has_virgl_3d;
bool has_edid;
bool has_indirect;
+ bool has_resource_assign_uuid;
struct work_struct config_changed_work;
@@ -206,6 +216,8 @@ struct virtio_gpu_device {
struct virtio_gpu_drv_capset *capsets;
uint32_t num_capsets;
struct list_head cap_cache;
+
+ spinlock_t resource_export_lock;
};
struct virtio_gpu_fpriv {
@@ -338,6 +350,10 @@ void virtio_gpu_dequeue_fence_func(struct work_struct *work);
void virtio_gpu_disable_notify(struct virtio_gpu_device *vgdev);
void virtio_gpu_enable_notify(struct virtio_gpu_device *vgdev);
+int
+virtio_gpu_cmd_resource_assign_uuid(struct virtio_gpu_device *vgdev,
+ struct virtio_gpu_object *bo);
+
/* virtio_gpu_display.c */
void virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
@@ -366,6 +382,11 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object **bo_ptr,
struct virtio_gpu_fence *fence);
/* virtgpu_prime.c */
+extern const struct virtio_dma_buf_ops virtgpu_dmabuf_ops;
+struct dma_buf *virtgpu_gem_prime_export(struct drm_gem_object *obj,
+ int flags);
+struct drm_gem_object *virtgpu_gem_prime_import(struct drm_device *dev,
+ struct dma_buf *buf);
struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
struct drm_device *dev, struct dma_buf_attachment *attach,
struct sg_table *sgt);
diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c
index 4009c2f97d08..be9719fb457b 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -134,6 +134,7 @@ int virtio_gpu_init(struct drm_device *dev)
vgdev->dev = dev->dev;
spin_lock_init(&vgdev->display_info_lock);
+ spin_lock_init(&vgdev->resource_export_lock);
ida_init(&vgdev->ctx_id_ida);
ida_init(&vgdev->resource_ida);
init_waitqueue_head(&vgdev->resp_wq);
@@ -159,6 +160,9 @@ int virtio_gpu_init(struct drm_device *dev)
if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_EDID)) {
vgdev->has_edid = true;
}
+ if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_CROSS_DEVICE)) {
+ vgdev->has_resource_assign_uuid = true;
+ }
if (virtio_has_feature(vgdev->vdev, VIRTIO_RING_F_INDIRECT_DESC)) {
vgdev->has_indirect = true;
}
diff --git a/drivers/gpu/drm/virtio/virtgpu_prime.c b/drivers/gpu/drm/virtio/virtgpu_prime.c
index 050d24c39a8f..667cd4e45bfd 100644
--- a/drivers/gpu/drm/virtio/virtgpu_prime.c
+++ b/drivers/gpu/drm/virtio/virtgpu_prime.c
@@ -22,13 +22,116 @@
* Authors: Andreas Pokorny
*/
+#include <drm/drm_drv.h>
#include <drm/drm_prime.h>
+#include <linux/dma-buf.h>
+#include <linux/virtio_dma_buf.h>
+
#include "virtgpu_drv.h"
-/* Empty Implementations as there should not be any other driver for a virtual
- * device that might share buffers with virtgpu
- */
+static int virtgpu_virtio_get_uuid(struct dma_buf *buf,
+ uuid_t *uuid)
+{
+ struct drm_gem_object *obj = buf->priv;
+ struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
+ struct virtio_gpu_device *vgdev = obj->dev->dev_private;
+
+ if (bo->uuid_state == UUID_NOT_INITIALIZED)
+ return -ENODEV;
+
+ wait_event(vgdev->resp_wq, bo->uuid_state != UUID_INITIALIZING);
+ if (bo->uuid_state == UUID_INITIALIZATION_FAILED)
+ return -ENODEV;
+
+ uuid_copy(uuid, &bo->uuid);
+
+ return 0;
+}
+
+int virtgpu_virtio_attach(struct dma_buf *buf,
+ struct dma_buf_attachment *attach)
+{
+ struct drm_gem_object *obj = buf->priv;
+ struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
+ struct virtio_gpu_device *vgdev = obj->dev->dev_private;
+ bool needs_init = false;
+ int ret = 0;
+
+ if (!vgdev->has_resource_assign_uuid)
+ return 0;
+
+ spin_lock(&vgdev->resource_export_lock);
+ if (bo->uuid_state == UUID_NOT_INITIALIZED) {
+ bo->uuid_state = UUID_INITIALIZING;
+ needs_init = true;
+ }
+ spin_unlock(&vgdev->resource_export_lock);
+
+ if (needs_init)
+ ret = virtio_gpu_cmd_resource_assign_uuid(vgdev, bo);
+ return ret;
+}
+
+const struct virtio_dma_buf_ops virtgpu_dmabuf_ops = {
+ .ops = {
+ .cache_sgt_mapping = true,
+ .attach = virtio_dma_buf_attach,
+ .detach = drm_gem_map_detach,
+ .map_dma_buf = drm_gem_map_dma_buf,
+ .unmap_dma_buf = drm_gem_unmap_dma_buf,
+ .release = drm_gem_dmabuf_release,
+ .mmap = drm_gem_dmabuf_mmap,
+ .vmap = drm_gem_dmabuf_vmap,
+ .vunmap = drm_gem_dmabuf_vunmap,
+ },
+ .virtio_attach = virtgpu_virtio_attach,
+ .device_attach = drm_gem_map_attach,
+ .get_uuid = virtgpu_virtio_get_uuid,
+};
+
+struct dma_buf *virtgpu_gem_prime_export(struct drm_gem_object *obj,
+ int flags)
+{
+ struct dma_buf *buf;
+ struct drm_device *dev = obj->dev;
+ DEFINE_VIRTIO_DMA_BUF_EXPORT_INFO(exp_info);
+
+ exp_info.ops = &virtgpu_dmabuf_ops;
+ exp_info.size = obj->size;
+ exp_info.flags = flags;
+ exp_info.priv = obj;
+ exp_info.resv = obj->resv;
+
+ buf = virtio_dma_buf_export(&exp_info);
+ if (IS_ERR(buf))
+ return buf;
+
+ drm_dev_get(dev);
+ drm_gem_object_get(obj);
+
+ return buf;
+}
+
+struct drm_gem_object *virtgpu_gem_prime_import(struct drm_device *dev,
+ struct dma_buf *buf)
+{
+ struct drm_gem_object *obj;
+
+ if (buf->ops == &virtgpu_dmabuf_ops.ops) {
+ obj = buf->priv;
+ if (obj->dev == dev) {
+ /*
+ * Importing dmabuf exported from our own gem increases
+ * refcount on gem itself instead of f_count of dmabuf.
+ */
+ drm_gem_object_get(obj);
+ return obj;
+ }
+ }
+
+ return drm_gem_prime_import(dev, buf);
+}
struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
struct drm_device *dev, struct dma_buf_attachment *attach,
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index cfe9c54f87a3..e9e7b1f885f6 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -1111,3 +1111,61 @@ void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
memcpy(cur_p, &output->cursor, sizeof(output->cursor));
virtio_gpu_queue_cursor(vgdev, vbuf);
}
+
+static void virtio_gpu_cmd_resource_assign_uuid_cb(struct virtio_gpu_device *vgdev,
+ struct virtio_gpu_vbuffer *vbuf)
+{
+ struct virtio_gpu_resp_resource_assign_uuid *resp =
+ (struct virtio_gpu_resp_resource_assign_uuid *)vbuf->resp_buf;
+ struct virtio_gpu_object *obj =
+ (struct virtio_gpu_object *)vbuf->data_buf;
+ uint32_t resp_type = le32_to_cpu(resp->hdr.type);
+
+ /*
+ * Keeps the data_buf, which points to this virtio_gpu_object, from
+ * getting kfree'd after this cb returns.
+ */
+ vbuf->data_buf = NULL;
+
+ spin_lock(&vgdev->resource_export_lock);
+ WARN_ON(obj->uuid_state != UUID_INITIALIZING);
+
+ if (resp_type == VIRTIO_GPU_RESP_OK_RESOURCE_ASSIGN_UUID &&
+ obj->uuid_state == UUID_INITIALIZING) {
+ memcpy(&obj->uuid.b, resp->uuid, sizeof(obj->uuid.b));
+ obj->uuid_state = UUID_INITIALIZED;
+ } else {
+ obj->uuid_state = UUID_INITIALIZATION_FAILED;
+ }
+ spin_unlock(&vgdev->resource_export_lock);
+
+ drm_gem_object_put_unlocked(&obj->base.base);
+ wake_up_all(&vgdev->resp_wq);
+}
+
+int
+virtio_gpu_cmd_resource_assign_uuid(struct virtio_gpu_device *vgdev,
+ struct virtio_gpu_object *bo)
+{
+ struct virtio_gpu_resource_assign_uuid *cmd_p;
+ struct virtio_gpu_vbuffer *vbuf;
+ struct virtio_gpu_resp_resource_assign_uuid *resp_buf;
+
+ resp_buf = kzalloc(sizeof(*resp_buf), GFP_KERNEL);
+ if (!resp_buf)
+ return -ENOMEM;
+
+ cmd_p = virtio_gpu_alloc_cmd_resp(vgdev,
+ virtio_gpu_cmd_resource_assign_uuid_cb, &vbuf, sizeof(*cmd_p),
+ sizeof(struct virtio_gpu_resp_resource_assign_uuid), resp_buf);
+ memset(cmd_p, 0, sizeof(*cmd_p));
+
+ cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_ASSIGN_UUID);
+ cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
+
+ /* Reuse the data_buf pointer for the object pointer. */
+ vbuf->data_buf = bo;
+ drm_gem_object_get(&bo->base.base);
+ virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
+ return 0;
+}
diff --git a/include/uapi/linux/virtio_gpu.h b/include/uapi/linux/virtio_gpu.h
index 0c85914d9369..9c428ef03060 100644
--- a/include/uapi/linux/virtio_gpu.h
+++ b/include/uapi/linux/virtio_gpu.h
@@ -50,6 +50,10 @@
* VIRTIO_GPU_CMD_GET_EDID
*/
#define VIRTIO_GPU_F_EDID 1
+/*
+ * VIRTIO_GPU_CMD_RESOURCE_ASSIGN_UUID
+ */
+#define VIRTIO_GPU_F_CROSS_DEVICE 2
enum virtio_gpu_ctrl_type {
VIRTIO_GPU_UNDEFINED = 0,
@@ -66,6 +70,7 @@ enum virtio_gpu_ctrl_type {
VIRTIO_GPU_CMD_GET_CAPSET_INFO,
VIRTIO_GPU_CMD_GET_CAPSET,
VIRTIO_GPU_CMD_GET_EDID,
+ VIRTIO_GPU_CMD_RESOURCE_ASSIGN_UUID,
/* 3d commands */
VIRTIO_GPU_CMD_CTX_CREATE = 0x0200,
@@ -87,6 +92,7 @@ enum virtio_gpu_ctrl_type {
VIRTIO_GPU_RESP_OK_CAPSET_INFO,
VIRTIO_GPU_RESP_OK_CAPSET,
VIRTIO_GPU_RESP_OK_EDID,
+ VIRTIO_GPU_RESP_OK_RESOURCE_ASSIGN_UUID,
/* error responses */
VIRTIO_GPU_RESP_ERR_UNSPEC = 0x1200,
@@ -340,4 +346,17 @@ enum virtio_gpu_formats {
VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM = 134,
};
+/* VIRTIO_GPU_CMD_RESOURCE_ASSIGN_UUID */
+struct virtio_gpu_resource_assign_uuid {
+ struct virtio_gpu_ctrl_hdr hdr;
+ __le32 resource_id;
+ __le32 padding;
+};
+
+/* VIRTIO_GPU_RESP_OK_RESOURCE_ASSIGN_UUID */
+struct virtio_gpu_resp_resource_assign_uuid {
+ struct virtio_gpu_ctrl_hdr hdr;
+ __u8 uuid[16];
+};
+
#endif
--
2.25.0.265.gbab2e86ba0-goog
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