[PATCH v2 1/2] virtio: New virtio_gpu driver
Simon Glass
sjg at chromium.org
Fri Jul 19 17:05:22 CEST 2024
Hi Jiaxun,
On Wed, 17 Jul 2024 at 15:34, Jiaxun Yang <jiaxun.yang at flygoat.com> wrote:
>
>
>
> 在2024年5月24日五月 下午9:02，Jiaxun Yang写道：
> > This driver is implemened based on latest VirtIO spec.
> > It follows operation prodcure as defined in the spec.
> >
> > It implemented multihead (mirroring) support as well.
> >
> > Signed-off-by: Jiaxun Yang <jiaxun.yang at flygoat.com>
>
> Ping
>
> > ---
> > v2:
> > - Add big endian code path
> > - Reword typical resolution for Kconfig symbol
> > ---
> > drivers/virtio/Kconfig | 29 +++
> > drivers/virtio/Makefile | 1 +
> > drivers/virtio/virtio-uclass.c | 1 +
> > drivers/virtio/virtio_gpu.c | 302 +++++++++++++++++++++++++++++
> > drivers/virtio/virtio_gpu.h | 428 +++++++++++++++++++++++++++++++++++++++++
> > include/virtio.h | 4 +-
> > 6 files changed, 764 insertions(+), 1 deletion(-)
Reviewed-by: Simon Glass <sjg at chromium.org>
Nits below
> >
> > diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
> > index 1de68867d52e..a4838278fabc 100644
> > --- a/drivers/virtio/Kconfig
> > +++ b/drivers/virtio/Kconfig
> > @@ -76,4 +76,33 @@ config VIRTIO_RNG
> > help
> > This is the virtual random number generator driver. It can be used
> > with QEMU based targets.
> > +
> > + config VIRTIO_GPU
> > + bool "virtio GPU driver"
> > + depends on VIRTIO && VIDEO
> > + default y
> > + help
> > + This is the virtual GPU display for virtio. It can be used with QEMU
> > + based targets.
QEMU-based
Can you add a bit more info about its capabilities? Should we be using
this instead of Bochs?
> > +
> > +if VIRTIO_GPU
> > +config VIRTIO_GPU_SIZE_X
> > + int "Width of display (X resolution)"
> > + default 1280
> > + help
> > + Sets the width of the display.
> > +
> > + These two options control the size of the display set up by QEMU.
> > + Typical size is 1280 x 1024 for compatibility.
> > +
> > +config VIRTIO_GPU_SIZE_Y
> > + int "High of display (Y resolution)"
Height
> > + default 1024
> > + help
> > + Sets the height of the display.
> > +
> > + These two options control the size of the display set up by QEMU.
> > + Typical size is 1280 x 1024 for compatibility.
> > +
> > +endif
> > endmenu
> > diff --git a/drivers/virtio/Makefile b/drivers/virtio/Makefile
> > index 4c63a6c69043..c830fb6e6049 100644
> > --- a/drivers/virtio/Makefile
> > +++ b/drivers/virtio/Makefile
> > @@ -11,3 +11,4 @@ obj-$(CONFIG_VIRTIO_SANDBOX) += virtio_sandbox.o
> > obj-$(CONFIG_VIRTIO_NET) += virtio_net.o
> > obj-$(CONFIG_VIRTIO_BLK) += virtio_blk.o
> > obj-$(CONFIG_VIRTIO_RNG) += virtio_rng.o
> > +obj-$(CONFIG_VIRTIO_GPU) += virtio_gpu.o
> > diff --git a/drivers/virtio/virtio-uclass.c
> > b/drivers/virtio/virtio-uclass.c
> > index 1dbc1a56aa21..1f3cdbf689c4 100644
> > --- a/drivers/virtio/virtio-uclass.c
> > +++ b/drivers/virtio/virtio-uclass.c
> > @@ -30,6 +30,7 @@ static const char *const
> > virtio_drv_name[VIRTIO_ID_MAX_NUM] = {
> > [VIRTIO_ID_NET] = VIRTIO_NET_DRV_NAME,
> > [VIRTIO_ID_BLOCK] = VIRTIO_BLK_DRV_NAME,
> > [VIRTIO_ID_RNG] = VIRTIO_RNG_DRV_NAME,
> > + [VIRTIO_ID_GPU] = VIRTIO_GPU_DRV_NAME,
> > };
> >
> > int virtio_get_config(struct udevice *vdev, unsigned int offset,
> > diff --git a/drivers/virtio/virtio_gpu.c b/drivers/virtio/virtio_gpu.c
> > new file mode 100644
> > index 000000000000..0b306bb9d2fa
> > --- /dev/null
> > +++ b/drivers/virtio/virtio_gpu.c
> > @@ -0,0 +1,302 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * Copyright (C) 2024, Jiaxun Yang <jiaxun.yang at flygoat.com>
> > + */
> > +
> > +#define pr_fmt(fmt) "virtio_gpu: " fmt
> > +
> > +#include <dm.h>
> > +#include <log.h>
> > +#include <malloc.h>
> > +#include <video.h>
> > +#include <virtio_types.h>
> > +#include <virtio.h>
> > +#include <virtio_ring.h>
> > +#include "virtio_gpu.h"
> > +#include <asm/io.h>
> > +
> > +struct virtio_gpu_priv {
> > + struct virtqueue *vq;
> > + u32 scanout_res_id;
> > + u64 fence_id;
> > + bool in_sync;
> > +};
> > +
> > +static int virtio_gpu_do_req(struct udevice *dev,
> > + enum virtio_gpu_ctrl_type type,
> > + void *in, size_t in_size,
> > + void *out, size_t out_size, bool flush)
Please add a function comment
> > +{
> > + int ret;
> > + uint len;
> > + struct virtio_gpu_priv *priv = dev_get_priv(dev);
> > + struct virtio_sg in_sg;
> > + struct virtio_sg out_sg;
> > + struct virtio_sg *sgs[] = { &in_sg, &out_sg };
> > + struct virtio_gpu_ctrl_hdr *ctrl_hdr_in = in;
> > + struct virtio_gpu_ctrl_hdr *ctrl_hdr_out = out;
> > +
> > + ctrl_hdr_in->type = cpu_to_virtio32(dev, (u32)type);
> > + if (flush) {
> > + ctrl_hdr_in->flags = cpu_to_virtio32(dev, VIRTIO_GPU_FLAG_FENCE);
> > + ctrl_hdr_in->fence_id = cpu_to_virtio64(dev, priv->fence_id++);
> > + } else {
> > + ctrl_hdr_in->flags = 0;
> > + ctrl_hdr_in->fence_id = 0;
> > + }
> > + ctrl_hdr_in->ctx_id = 0;
> > + ctrl_hdr_in->ring_idx = 0;
> > + in_sg.addr = in;
> > + in_sg.length = in_size;
> > + out_sg.addr = out;
> > + out_sg.length = out_size;
> > +
> > + ret = virtqueue_add(priv->vq, sgs, 1, 1);
> > + if (ret) {
> > + log_debug("virtqueue_add failed %d\n", ret);
> > + return ret;
> > + }
> > + virtqueue_kick(priv->vq);
> > +
> > + debug("wait...");
> > + while (!virtqueue_get_buf(priv->vq, &len))
> > + ;
> > + debug("done\n");
> > +
> > + if (out_size != len) {
> > + log_debug("Invalid response size %d, expected %d\n",
> > + len, (uint)out_size);
> > + }
> > +
> > + return virtio32_to_cpu(dev, ctrl_hdr_out->type);
> > +}
> > +
> > +static int virtio_gpu_probe(struct udevice *dev)
> > +{
> > + struct virtio_gpu_priv *priv = dev_get_priv(dev);
> > + struct video_uc_plat *plat = dev_get_uclass_plat(dev);
> > + struct video_priv *uc_priv = dev_get_uclass_priv(dev);
> > + struct virtio_gpu_ctrl_hdr ctrl_hdr_in;
> > + struct virtio_gpu_ctrl_hdr ctrl_hdr_out;
> > + struct virtio_gpu_resp_display_info *disp_info_out;
> > + struct virtio_gpu_display_one *disp;
> > + struct virtio_gpu_resource_create_2d *res_create_2d_in;
> > + void *res_buf_in;
> > + struct virtio_gpu_resource_attach_backing *res_attach_backing_in;
> > + struct virtio_gpu_mem_entry *mem_entry;
> > + struct virtio_gpu_set_scanout *set_scanout_in;
> > + unsigned int scanout_mask = 0;
> > + int ret, i;
> > +
> > + if (!plat->base) {
> > + log_warning("No framebuffer allocated\n");
> > + return -EINVAL;
> > + }
> > +
> > + ret = virtio_find_vqs(dev, 1, &priv->vq);
> > + if (ret < 0) {
> > + log_warning("virtio_find_vqs failed\n");
> > + return ret;
> > + }
> > +
> > + disp_info_out = malloc(sizeof(struct virtio_gpu_resp_display_info));
> > + ret = virtio_gpu_do_req(dev, VIRTIO_GPU_CMD_GET_DISPLAY_INFO,
> > &ctrl_hdr_in,
> > + sizeof(struct virtio_gpu_ctrl_hdr), disp_info_out,
> > + sizeof(struct virtio_gpu_resp_display_info), false);
> > +
> > + if (ret != VIRTIO_GPU_RESP_OK_DISPLAY_INFO) {
> > + log_warning("CMD_GET_DISPLAY_INFO failed %d\n", ret);
> > + ret = -EINVAL;
> > + goto out_free_disp;
> > + }
> > +
> > + for (i = 0; i < VIRTIO_GPU_MAX_SCANOUTS; i++) {
> > + disp = &disp_info_out->pmodes[i];
> > + if (!disp->enabled)
> > + continue;
> > + log_debug("Found available scanout: %d\n", i);
> > + scanout_mask |= 1 << i;
> > + }
> > +
> > + if (!scanout_mask) {
> > + log_warning("No active scanout found\n");
> > + ret = -EINVAL;
> > + goto out_free_disp;
> > + }
> > +
> > + free(disp_info_out);
> > + disp_info_out = NULL;
> > +
> > + /* TODO: We can parse EDID for those info */
> > + uc_priv->xsize = CONFIG_VAL(VIRTIO_GPU_SIZE_X);
> > + uc_priv->ysize = CONFIG_VAL(VIRTIO_GPU_SIZE_Y);
> > + uc_priv->bpix = VIDEO_BPP32;
> > +
> > + priv->scanout_res_id = 1;
> > + res_create_2d_in = malloc(sizeof(struct
> > virtio_gpu_resource_create_2d));
> > + res_create_2d_in->resource_id = cpu_to_virtio32(dev,
> > priv->scanout_res_id);
> > +#ifdef __BIG_ENDIAN
> > + res_create_2d_in->format = cpu_to_virtio32(dev,
> > VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM);
> > +#else
> > + res_create_2d_in->format = cpu_to_virtio32(dev,
> > VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM);
> > +#endif
> > + res_create_2d_in->width = cpu_to_virtio32(dev, uc_priv->xsize);
> > + res_create_2d_in->height = cpu_to_virtio32(dev, uc_priv->ysize);
> > +
> > + ret = virtio_gpu_do_req(dev, VIRTIO_GPU_CMD_RESOURCE_CREATE_2D,
> > res_create_2d_in,
> > + sizeof(struct virtio_gpu_resource_create_2d), &ctrl_hdr_out,
> > + sizeof(struct virtio_gpu_ctrl_hdr), false);
> > + if (ret != VIRTIO_GPU_RESP_OK_NODATA) {
> > + log_warning("CMD_RESOURCE_CREATE_2D failed %d\n", ret);
> > + ret = -EINVAL;
> > + goto out_free_res_create_2d;
> > + }
> > +
> > + free(res_create_2d_in);
> > + res_create_2d_in = NULL;
> > +
> > + res_buf_in = malloc(sizeof(struct virtio_gpu_resource_attach_backing)
> > +
> > + sizeof(struct virtio_gpu_mem_entry));
> > + res_attach_backing_in = res_buf_in;
> > + mem_entry = res_buf_in + sizeof(struct
> > virtio_gpu_resource_attach_backing);
> > + res_attach_backing_in->resource_id = cpu_to_virtio32(dev,
> > priv->scanout_res_id);
> > + res_attach_backing_in->nr_entries = cpu_to_virtio32(dev, 1);
> > + mem_entry->addr = cpu_to_virtio64(dev, virt_to_phys((void
> > *)plat->base));
> > + mem_entry->length = cpu_to_virtio32(dev, plat->size);
> > + mem_entry->padding = 0;
> > +
> > + ret = virtio_gpu_do_req(dev, VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING,
> > res_buf_in,
> > + sizeof(struct virtio_gpu_resource_attach_backing) +
> > + sizeof(struct virtio_gpu_mem_entry), &ctrl_hdr_out,
> > + sizeof(struct virtio_gpu_ctrl_hdr), false);
> > +
> > + if (ret != VIRTIO_GPU_RESP_OK_NODATA) {
> > + log_warning("CMD_RESOURCE_ATTACH_BACKING failed %d\n", ret);
> > + ret = -EINVAL;
> > + goto out_free_res_buf;
> > + }
> > + free(res_buf_in);
> > + res_buf_in = NULL;
> > +
> > + set_scanout_in = malloc(sizeof(struct virtio_gpu_set_scanout));
Could these structs be inside priv instead of allocating each one?
> > + while (scanout_mask) {
> > + u32 active_scanout = ffs(scanout_mask) - 1;
> > +
> > + set_scanout_in->r.x = 0;
> > + set_scanout_in->r.y = 0;
> > + set_scanout_in->r.width = cpu_to_virtio32(dev, uc_priv->xsize);
> > + set_scanout_in->r.height = cpu_to_virtio32(dev, uc_priv->ysize);
> > + set_scanout_in->scanout_id = cpu_to_virtio32(dev, active_scanout);
> > + set_scanout_in->resource_id = cpu_to_virtio32(dev,
> > priv->scanout_res_id);
> > +
> > + ret = virtio_gpu_do_req(dev, VIRTIO_GPU_CMD_SET_SCANOUT,
> > set_scanout_in,
> > + sizeof(struct virtio_gpu_set_scanout), &ctrl_hdr_out,
> > + sizeof(struct virtio_gpu_ctrl_hdr), false);
> > +
> > + if (ret != VIRTIO_GPU_RESP_OK_NODATA) {
> > + log_warning("CMD_SET_SCANOUT failed %d for scanout %d\n",
> > + ret, active_scanout);
> > + ret = -EINVAL;
> > + goto out_free_set_scanout;
> > + }
> > + scanout_mask &= ~(1 << active_scanout);
> > + }
> > + free(set_scanout_in);
> > + set_scanout_in = NULL;
> > +
> > + return 0;
> > +out_free_set_scanout:
> > + if (set_scanout_in)
> > + free(set_scanout_in);
> > +out_free_res_buf:
> > + if (res_buf_in)
> > + free(res_buf_in);
> > +out_free_res_create_2d:
> > + if (res_create_2d_in)
> > + free(res_create_2d_in);
> > +out_free_disp:
> > + if (disp_info_out)
> > + free(disp_info_out);
> > + return ret;
> > +}
> > +
> > +static int virtio_gpu_bind(struct udevice *dev)
> > +{
> > + struct virtio_dev_priv *virtio_uc_priv =
> > dev_get_uclass_priv(dev->parent);
> > + struct video_uc_plat *plat = dev_get_uclass_plat(dev);
> > +
> > + /* Indicate what driver features we support */
> > + virtio_driver_features_init(virtio_uc_priv, NULL, 0, NULL, 0);
> > + plat->base = 0; /* Framebuffer will be allocated by the video-uclass
> > */
> > + plat->size = CONFIG_VAL(VIRTIO_GPU_SIZE_X) *
> > + CONFIG_VAL(VIRTIO_GPU_SIZE_X) * VNBYTES(VIDEO_BPP32);
> > +
> > + return 0;
> > +}
> > +
> > +static int virtio_gpu_video_sync(struct udevice *dev)
> > +{
> > + struct virtio_gpu_priv *priv = dev_get_priv(dev);
> > + struct video_priv *uc_priv = dev_get_uclass_priv(dev);
> > + struct virtio_gpu_transfer_to_host_2d to_host_2d_in;
> > + struct virtio_gpu_resource_flush res_flush_in;
> > + struct virtio_gpu_ctrl_hdr ctrl_hdr_out;
> > + int ret;
> > +
> > + /* We need to protect sync function reentrance to prevent exausting
> > VQ */
> > + if (priv->in_sync)
> > + return 0;
> > +
> > + priv->in_sync = true;
> > +
> > + to_host_2d_in.r.x = 0;
> > + to_host_2d_in.r.y = 0;
> > + to_host_2d_in.r.width = cpu_to_virtio32(dev, uc_priv->xsize);
> > + to_host_2d_in.r.height = cpu_to_virtio32(dev, uc_priv->ysize);
> > + to_host_2d_in.offset = 0;
> > + to_host_2d_in.resource_id = cpu_to_virtio32(dev,
> > priv->scanout_res_id);
> > + to_host_2d_in.padding = 0;
> > +
> > + ret = virtio_gpu_do_req(dev, VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D,
> > &to_host_2d_in,
> > + sizeof(struct virtio_gpu_transfer_to_host_2d), &ctrl_hdr_out,
> > + sizeof(struct virtio_gpu_ctrl_hdr), true);
> > + if (ret != VIRTIO_GPU_RESP_OK_NODATA) {
> > + log_debug("CMD_TRANSFER_TO_HOST_2D failed %d\n", ret);
> > + priv->in_sync = false;
> > + return -EINVAL;
> > + }
> > +
> > + res_flush_in.r.x = 0;
> > + res_flush_in.r.y = 0;
> > + res_flush_in.r.width = cpu_to_virtio32(dev, uc_priv->xsize);
> > + res_flush_in.r.height = cpu_to_virtio32(dev, uc_priv->ysize);
> > + res_flush_in.resource_id = cpu_to_virtio32(dev, priv->scanout_res_id);
> > + res_flush_in.padding = 0;
> > +
> > + ret = virtio_gpu_do_req(dev, VIRTIO_GPU_CMD_RESOURCE_FLUSH,
> > &res_flush_in,
> > + sizeof(struct virtio_gpu_resource_flush), &ctrl_hdr_out,
> > + sizeof(struct virtio_gpu_ctrl_hdr), true);
> > + if (ret != VIRTIO_GPU_RESP_OK_NODATA) {
> > + log_debug("CMD_RESOURCE_FLUSH failed %d\n", ret);
> > + priv->in_sync = false;
> > + return -EINVAL;
> > + }
> > +
> > + priv->in_sync = false;
> > + return 0;
> > +}
> > +
> > +static struct video_ops virtio_gpu_ops = {
> > + .video_sync = virtio_gpu_video_sync,
> > +};
> > +
> > +U_BOOT_DRIVER(virtio_gpu) = {
> > + .name = VIRTIO_GPU_DRV_NAME,
> > + .id = UCLASS_VIDEO,
> > + .bind = virtio_gpu_bind,
> > + .probe = virtio_gpu_probe,
> > + .remove = virtio_reset,
> > + .ops = &virtio_gpu_ops,
> > + .priv_auto = sizeof(struct virtio_gpu_priv),
> > + .flags = DM_FLAG_ACTIVE_DMA,
> > +};
> > diff --git a/drivers/virtio/virtio_gpu.h b/drivers/virtio/virtio_gpu.h
> > new file mode 100644
> > index 000000000000..d2e5c0e02f13
> > --- /dev/null
> > +++ b/drivers/virtio/virtio_gpu.h
> > @@ -0,0 +1,428 @@
> > +/* SPDX-License-Identifier: BSD-3-Clause */
> > +/*
> > + * Copyright (C) 2024, Jiaxun Yang <jiaxun.yang at flygoat.com>
> > + *
> > + * From Linux kernel include/uapi/linux/virtio_gpu.h
> > + */
> > +
> > +#ifndef VIRTIO_GPU_HW_H
> > +#define VIRTIO_GPU_HW_H
> > +
> > +#include <linux/types.h>
> > +
> > +/*
> > + * VIRTIO_GPU_CMD_CTX_*
> > + * VIRTIO_GPU_CMD_*_3D
> > + */
> > +#define VIRTIO_GPU_F_VIRGL 0
> > +
> > +/*
> > + * VIRTIO_GPU_CMD_GET_EDID
> > + */
> > +#define VIRTIO_GPU_F_EDID 1
> > +/*
> > + * VIRTIO_GPU_CMD_RESOURCE_ASSIGN_UUID
> > + */
> > +#define VIRTIO_GPU_F_RESOURCE_UUID 2
> > +
> > +/*
> > + * VIRTIO_GPU_CMD_RESOURCE_CREATE_BLOB
> > + */
> > +#define VIRTIO_GPU_F_RESOURCE_BLOB 3
> > +/*
> > + * VIRTIO_GPU_CMD_CREATE_CONTEXT with
> > + * context_init and multiple timelines
> > + */
> > +#define VIRTIO_GPU_F_CONTEXT_INIT 4
> > +
> > +enum virtio_gpu_ctrl_type {
> > + VIRTIO_GPU_UNDEFINED = 0,
> > +
> > + /* 2d commands */
> > + VIRTIO_GPU_CMD_GET_DISPLAY_INFO = 0x0100,
> > + VIRTIO_GPU_CMD_RESOURCE_CREATE_2D,
> > + VIRTIO_GPU_CMD_RESOURCE_UNREF,
> > + VIRTIO_GPU_CMD_SET_SCANOUT,
> > + VIRTIO_GPU_CMD_RESOURCE_FLUSH,
> > + VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D,
> > + VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING,
> > + VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING,
> > + VIRTIO_GPU_CMD_GET_CAPSET_INFO,
> > + VIRTIO_GPU_CMD_GET_CAPSET,
> > + VIRTIO_GPU_CMD_GET_EDID,
> > + VIRTIO_GPU_CMD_RESOURCE_ASSIGN_UUID,
> > + VIRTIO_GPU_CMD_RESOURCE_CREATE_BLOB,
> > + VIRTIO_GPU_CMD_SET_SCANOUT_BLOB,
> > +
> > + /* 3d commands */
> > + VIRTIO_GPU_CMD_CTX_CREATE = 0x0200,
> > + VIRTIO_GPU_CMD_CTX_DESTROY,
> > + VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE,
> > + VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE,
> > + VIRTIO_GPU_CMD_RESOURCE_CREATE_3D,
> > + VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D,
> > + VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D,
> > + VIRTIO_GPU_CMD_SUBMIT_3D,
> > + VIRTIO_GPU_CMD_RESOURCE_MAP_BLOB,
> > + VIRTIO_GPU_CMD_RESOURCE_UNMAP_BLOB,
> > +
> > + /* cursor commands */
> > + VIRTIO_GPU_CMD_UPDATE_CURSOR = 0x0300,
> > + VIRTIO_GPU_CMD_MOVE_CURSOR,
> > +
> > + /* success responses */
> > + VIRTIO_GPU_RESP_OK_NODATA = 0x1100,
> > + VIRTIO_GPU_RESP_OK_DISPLAY_INFO,
> > + VIRTIO_GPU_RESP_OK_CAPSET_INFO,
> > + VIRTIO_GPU_RESP_OK_CAPSET,
> > + VIRTIO_GPU_RESP_OK_EDID,
> > + VIRTIO_GPU_RESP_OK_RESOURCE_UUID,
> > + VIRTIO_GPU_RESP_OK_MAP_INFO,
> > +
> > + /* error responses */
> > + VIRTIO_GPU_RESP_ERR_UNSPEC = 0x1200,
> > + VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY,
> > + VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID,
> > + VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID,
> > + VIRTIO_GPU_RESP_ERR_INVALID_CONTEXT_ID,
> > + VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER,
> > +};
> > +
> > +enum virtio_gpu_shm_id {
> > + VIRTIO_GPU_SHM_ID_UNDEFINED = 0,
> > + /*
> > + * VIRTIO_GPU_CMD_RESOURCE_MAP_BLOB
> > + * VIRTIO_GPU_CMD_RESOURCE_UNMAP_BLOB
> > + */
> > + VIRTIO_GPU_SHM_ID_HOST_VISIBLE = 1
> > +};
> > +
> > +#define VIRTIO_GPU_FLAG_FENCE (1 << 0)
> > +/*
> > + * If the following flag is set, then ring_idx contains the index
> > + * of the command ring that needs to used when creating the fence
> > + */
> > +#define VIRTIO_GPU_FLAG_INFO_RING_IDX (1 << 1)
> > +
> > +struct virtio_gpu_ctrl_hdr {
> > + __le32 type;
> > + __le32 flags;
> > + __le64 fence_id;
> > + __le32 ctx_id;
> > + __u8 ring_idx;
> > + __u8 padding[3];
> > +};
> > +
> > +/* data passed in the cursor vq */
> > +
> > +struct virtio_gpu_cursor_pos {
> > + __le32 scanout_id;
> > + __le32 x;
> > + __le32 y;
> > + __le32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_UPDATE_CURSOR, VIRTIO_GPU_CMD_MOVE_CURSOR */
> > +struct virtio_gpu_update_cursor {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + struct virtio_gpu_cursor_pos pos; /* update & move */
> > + __le32 resource_id; /* update only */
> > + __le32 hot_x; /* update only */
> > + __le32 hot_y; /* update only */
> > + __le32 padding;
> > +};
> > +
> > +/* data passed in the control vq, 2d related */
But there are no comments so we don't know what these structs are for
or what the fields do. Can you add documentation, or a pointer to
somewhere where it exists?
> > +
> > +struct virtio_gpu_rect {
> > + __le32 x;
> > + __le32 y;
> > + __le32 width;
> > + __le32 height;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_RESOURCE_UNREF */
> > +struct virtio_gpu_resource_unref {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 resource_id;
> > + __le32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_RESOURCE_CREATE_2D: create a 2d resource with a
> > format */
> > +struct virtio_gpu_resource_create_2d {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 resource_id;
> > + __le32 format;
> > + __le32 width;
> > + __le32 height;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_SET_SCANOUT */
> > +struct virtio_gpu_set_scanout {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + struct virtio_gpu_rect r;
> > + __le32 scanout_id;
> > + __le32 resource_id;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_RESOURCE_FLUSH */
> > +struct virtio_gpu_resource_flush {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + struct virtio_gpu_rect r;
> > + __le32 resource_id;
> > + __le32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D: simple transfer to_host */
> > +struct virtio_gpu_transfer_to_host_2d {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + struct virtio_gpu_rect r;
> > + __le64 offset;
> > + __le32 resource_id;
> > + __le32 padding;
> > +};
> > +
> > +struct virtio_gpu_mem_entry {
> > + __le64 addr;
> > + __le32 length;
> > + __le32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING */
> > +struct virtio_gpu_resource_attach_backing {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 resource_id;
> > + __le32 nr_entries;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING */
> > +struct virtio_gpu_resource_detach_backing {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 resource_id;
> > + __le32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_RESP_OK_DISPLAY_INFO */
> > +#define VIRTIO_GPU_MAX_SCANOUTS 16
> > +struct virtio_gpu_resp_display_info {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + struct virtio_gpu_display_one {
> > + struct virtio_gpu_rect r;
> > + __le32 enabled;
> > + __le32 flags;
> > + } pmodes[VIRTIO_GPU_MAX_SCANOUTS];
> > +};
> > +
> > +/* data passed in the control vq, 3d related */
> > +
> > +struct virtio_gpu_box {
> > + __le32 x, y, z;
> > + __le32 w, h, d;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D,
> > VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D */
> > +struct virtio_gpu_transfer_host_3d {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + struct virtio_gpu_box box;
> > + __le64 offset;
> > + __le32 resource_id;
> > + __le32 level;
> > + __le32 stride;
> > + __le32 layer_stride;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_RESOURCE_CREATE_3D */
> > +#define VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP (1 << 0)
> > +struct virtio_gpu_resource_create_3d {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 resource_id;
> > + __le32 target;
> > + __le32 format;
> > + __le32 bind;
> > + __le32 width;
> > + __le32 height;
> > + __le32 depth;
> > + __le32 array_size;
> > + __le32 last_level;
> > + __le32 nr_samples;
> > + __le32 flags;
> > + __le32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_CTX_CREATE */
> > +#define VIRTIO_GPU_CONTEXT_INIT_CAPSET_ID_MASK 0x000000ff
> > +struct virtio_gpu_ctx_create {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 nlen;
> > + __le32 context_init;
> > + char debug_name[64];
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_CTX_DESTROY */
> > +struct virtio_gpu_ctx_destroy {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE,
> > VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE */
> > +struct virtio_gpu_ctx_resource {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 resource_id;
> > + __le32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_SUBMIT_3D */
> > +struct virtio_gpu_cmd_submit {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 size;
> > + __le32 padding;
> > +};
> > +
> > +#define VIRTIO_GPU_CAPSET_VIRGL 1
> > +#define VIRTIO_GPU_CAPSET_VIRGL2 2
> > +/* 3 is reserved for gfxstream */
> > +#define VIRTIO_GPU_CAPSET_VENUS 4
> > +
> > +/* VIRTIO_GPU_CMD_GET_CAPSET_INFO */
> > +struct virtio_gpu_get_capset_info {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 capset_index;
> > + __le32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_RESP_OK_CAPSET_INFO */
> > +struct virtio_gpu_resp_capset_info {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 capset_id;
> > + __le32 capset_max_version;
> > + __le32 capset_max_size;
> > + __le32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_GET_CAPSET */
> > +struct virtio_gpu_get_capset {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 capset_id;
> > + __le32 capset_version;
> > +};
> > +
> > +/* VIRTIO_GPU_RESP_OK_CAPSET */
> > +struct virtio_gpu_resp_capset {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __u8 capset_data[];
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_GET_EDID */
> > +struct virtio_gpu_cmd_get_edid {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 scanout;
> > + __le32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_RESP_OK_EDID */
> > +struct virtio_gpu_resp_edid {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 size;
> > + __le32 padding;
> > + __u8 edid[1024];
> > +};
> > +
> > +#define VIRTIO_GPU_EVENT_DISPLAY (1 << 0)
> > +
> > +struct virtio_gpu_config {
> > + __le32 events_read;
> > + __le32 events_clear;
> > + __le32 num_scanouts;
> > + __le32 num_capsets;
> > +};
> > +
> > +/* simple formats for fbcon/X use */
> > +enum virtio_gpu_formats {
> > + VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM = 1,
> > + VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM = 2,
> > + VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM = 3,
> > + VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM = 4,
> > +
> > + VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM = 67,
> > + VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM = 68,
> > +
> > + VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM = 121,
> > + 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_UUID */
> > +struct virtio_gpu_resp_resource_uuid {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __u8 uuid[16];
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_RESOURCE_CREATE_BLOB */
> > +struct virtio_gpu_resource_create_blob {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 resource_id;
> > +#define VIRTIO_GPU_BLOB_MEM_GUEST 0x0001
> > +#define VIRTIO_GPU_BLOB_MEM_HOST3D 0x0002
> > +#define VIRTIO_GPU_BLOB_MEM_HOST3D_GUEST 0x0003
> > +
> > +#define VIRTIO_GPU_BLOB_FLAG_USE_MAPPABLE 0x0001
> > +#define VIRTIO_GPU_BLOB_FLAG_USE_SHAREABLE 0x0002
> > +#define VIRTIO_GPU_BLOB_FLAG_USE_CROSS_DEVICE 0x0004
> > + /* zero is invalid blob mem */
> > + __le32 blob_mem;
> > + __le32 blob_flags;
> > + __le32 nr_entries;
> > + __le64 blob_id;
> > + __le64 size;
> > + /*
> > + * sizeof(nr_entries * virtio_gpu_mem_entry) bytes follow
> > + */
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_SET_SCANOUT_BLOB */
> > +struct virtio_gpu_set_scanout_blob {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + struct virtio_gpu_rect r;
> > + __le32 scanout_id;
> > + __le32 resource_id;
> > + __le32 width;
> > + __le32 height;
> > + __le32 format;
> > + __le32 padding;
> > + __le32 strides[4];
> > + __le32 offsets[4];
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_RESOURCE_MAP_BLOB */
> > +struct virtio_gpu_resource_map_blob {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 resource_id;
> > + __le32 padding;
> > + __le64 offset;
> > +};
> > +
> > +/* VIRTIO_GPU_RESP_OK_MAP_INFO */
> > +#define VIRTIO_GPU_MAP_CACHE_MASK 0x0f
> > +#define VIRTIO_GPU_MAP_CACHE_NONE 0x00
> > +#define VIRTIO_GPU_MAP_CACHE_CACHED 0x01
> > +#define VIRTIO_GPU_MAP_CACHE_UNCACHED 0x02
> > +#define VIRTIO_GPU_MAP_CACHE_WC 0x03
> > +struct virtio_gpu_resp_map_info {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __u32 map_info;
> > + __u32 padding;
> > +};
> > +
> > +/* VIRTIO_GPU_CMD_RESOURCE_UNMAP_BLOB */
> > +struct virtio_gpu_resource_unmap_blob {
> > + struct virtio_gpu_ctrl_hdr hdr;
> > + __le32 resource_id;
> > + __le32 padding;
> > +};
> > +
> > +#endif
> > diff --git a/include/virtio.h b/include/virtio.h
> > index 1ab0ec5f39f5..93a6f5e92a48 100644
> > --- a/include/virtio.h
> > +++ b/include/virtio.h
> > @@ -27,11 +27,13 @@
> > #define VIRTIO_ID_NET 1 /* virtio net */
> > #define VIRTIO_ID_BLOCK 2 /* virtio block */
> > #define VIRTIO_ID_RNG 4 /* virtio rng */
> > -#define VIRTIO_ID_MAX_NUM 5
> > +#define VIRTIO_ID_GPU 16 /* virtio GPU */
> > +#define VIRTIO_ID_MAX_NUM 17
> >
> > #define VIRTIO_NET_DRV_NAME "virtio-net"
> > #define VIRTIO_BLK_DRV_NAME "virtio-blk"
> > #define VIRTIO_RNG_DRV_NAME "virtio-rng"
> > +#define VIRTIO_GPU_DRV_NAME "virtio-gpu"
> >
> > /* Status byte for guest to report progress, and synchronize features */
> >
> >
> > --
> > 2.43.0
>
Regards,
Simon
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