> -----Original Message-----
> From: Pei, Andy <andy....@intel.com>
> Sent: Wednesday, May 18, 2022 8:14 PM
> To: dev@dpdk.org
> Cc: Xia, Chenbo <chenbo....@intel.com>; maxime.coque...@redhat.com; Cao,
> Gang <gang....@intel.com>; Liu, Changpeng <changpeng....@intel.com>; Xu,
> Rosen <rosen...@intel.com>; Xiao, QimaiX <qimaix.x...@intel.com>
> Subject: [PATCH v8 09/13] examples/vdpa: add add virtio blk support
Double add in the title
>
> Add virtio blk device support to vDPA example.
>
> Signed-off-by: Andy Pei <andy....@intel.com>
> ---
> examples/vdpa/main.c | 56
> ++++++++++++++++++++++++++++++++++++++
> examples/vdpa/vdpa_blk_compact.h | 58
> ++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 114 insertions(+)
> create mode 100644 examples/vdpa/vdpa_blk_compact.h
>
> diff --git a/examples/vdpa/main.c b/examples/vdpa/main.c
> index 5ab0765..62b6660 100644
> --- a/examples/vdpa/main.c
> +++ b/examples/vdpa/main.c
> @@ -20,6 +20,7 @@
> #include <cmdline_parse_string.h>
> #include <cmdline_parse_num.h>
> #include <cmdline.h>
> +#include "vdpa_blk_compact.h"
>
> #define MAX_PATH_LEN 128
> #define MAX_VDPA_SAMPLE_PORTS 1024
> @@ -159,8 +160,53 @@ struct vdpa_port {
> };
>
> static int
> +vdpa_blk_device_set_features_and_protocol(const char *path)
> +{
> + uint64_t protocol_features = 0;
> + int ret;
> +
> + ret = rte_vhost_driver_set_features(path, VHOST_BLK_FEATURES);
> + if (ret != 0) {
> + RTE_LOG(ERR, VDPA,
> + "rte_vhost_driver_set_features for %s failed.\n",
> + path);
> + goto out;
> + }
> +
> + ret = rte_vhost_driver_disable_features(path,
> + VHOST_BLK_DISABLED_FEATURES);
> + if (ret != 0) {
> + RTE_LOG(ERR, VDPA,
> + "rte_vhost_driver_disable_features for %s failed.\n",
> + path);
> + goto out;
> + }
> +
> + ret = rte_vhost_driver_get_protocol_features(path,
> &protocol_features);
> + if (ret != 0) {
> + RTE_LOG(ERR, VDPA,
> + "rte_vhost_driver_get_protocol_features for %s
> failed.\n",
> + path);
> + goto out;
> + }
> +
> + protocol_features |= VHOST_BLK_PROTOCOL_FEATURES;
> +
> + ret = rte_vhost_driver_set_protocol_features(path,
> protocol_features);
> + if (ret != 0) {
> + RTE_LOG(ERR, VDPA,
> + "rte_vhost_driver_set_protocol_features for %s
> failed.\n",
> + path);
> + }
> +
> +out:
> + return ret;
> +}
> +
> +static int
> start_vdpa(struct vdpa_port *vport)
> {
> + uint32_t device_type = 0;
> int ret;
> char *socket_path = vport->ifname;
>
> @@ -192,6 +238,16 @@ struct vdpa_port {
> "attach vdpa device failed: %s\n",
> socket_path);
>
> + ret = rte_vhost_driver_get_vdpa_dev_type(socket_path, &device_type);
> + if (ret == 0 && device_type == VDPA_DEVICE_TYPE_BLK) {
> + RTE_LOG(NOTICE, VDPA, "%s is a blk device\n", socket_path);
> + ret = vdpa_blk_device_set_features_and_protocol(socket_path);
> + if (ret != 0)
> + rte_exit(EXIT_FAILURE,
> + "set vhost blk driver features and protocol
> features failed: %s\n",
> + socket_path);
> + }
> +
> if (rte_vhost_driver_start(socket_path) < 0)
> rte_exit(EXIT_FAILURE,
> "start vhost driver failed: %s\n",
> diff --git a/examples/vdpa/vdpa_blk_compact.h
> b/examples/vdpa/vdpa_blk_compact.h
> new file mode 100644
> index 0000000..4193561
> --- /dev/null
> +++ b/examples/vdpa/vdpa_blk_compact.h
> @@ -0,0 +1,58 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(c) 2022 Intel Corporation
> + */
> +
> +#ifndef _VDPA_BLK_COMPACT_H_
> +#define _VDPA_BLK_COMPACT_H_
> +
> +/**
> + * @file
> + *
> + * Device specific vhost lib
> + */
You describe the file with more details, or maybe just delete it.
> +
> +#include <rte_vhost.h>
> +
> +/* Feature bits */
> +#define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size
> */
> +#define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments
> */
> +#define VIRTIO_BLK_F_GEOMETRY 4 /* Legacy geometry available */
> +#define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available
> */
> +#define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is
> available */
> +#define VIRTIO_BLK_F_MQ 12 /* support more than one vq */
> +
> +/* Legacy feature bits */
> +#ifndef VIRTIO_BLK_NO_LEGACY
This is always true? Is it possible VIRTIO_BLK_NO_LEGACY get defined?
Thanks,
Chenbo
> +#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */
> +#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru
> */
> +#define VIRTIO_BLK_F_CONFIG_WCE 11 /* Writeback mode available in
> config */
> +#endif /* !VIRTIO_BLK_NO_LEGACY */
> +
> +#define VHOST_BLK_FEATURES_BASE ((1ULL << VHOST_F_LOG_ALL) | \
> + (1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \
> + (1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
> + (1ULL << VIRTIO_RING_F_EVENT_IDX) | \
> + (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
> + (1ULL << VIRTIO_F_VERSION_1))
> +
> +#define VHOST_BLK_DISABLED_FEATURES_BASE ((1ULL <<
> VIRTIO_F_NOTIFY_ON_EMPTY) | \
> + (1ULL << VIRTIO_RING_F_EVENT_IDX))
> +
> +#define VHOST_BLK_FEATURES (VHOST_BLK_FEATURES_BASE | \
> + (1ULL << VIRTIO_BLK_F_SIZE_MAX) | (1ULL << VIRTIO_BLK_F_SEG_MAX) | \
> + (1ULL << VIRTIO_BLK_F_GEOMETRY) | (1ULL << VIRTIO_BLK_F_BLK_SIZE) |
> \
> + (1ULL << VIRTIO_BLK_F_TOPOLOGY) | (1ULL << VIRTIO_BLK_F_BARRIER) |
> \
> + (1ULL << VIRTIO_BLK_F_SCSI) | (1ULL << VIRTIO_BLK_F_CONFIG_WCE)
> | \
> + (1ULL << VIRTIO_BLK_F_MQ))
> +
> +/* Not supported features */
> +#define VHOST_BLK_DISABLED_FEATURES (VHOST_BLK_DISABLED_FEATURES_BASE | \
> + (1ULL << VIRTIO_BLK_F_GEOMETRY) | (1ULL << VIRTIO_BLK_F_BARRIER) | \
> + (1ULL << VIRTIO_BLK_F_SCSI) | (1ULL << VIRTIO_BLK_F_CONFIG_WCE))
> +
> +/* Vhost-blk support protocol features */
> +#define VHOST_BLK_PROTOCOL_FEATURES \
> + ((1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD) | \
> + (1ULL << VHOST_USER_PROTOCOL_F_CONFIG))
> +
> +#endif /* _VDPA_BLK_COMPACT_H_ */
> --
> 1.8.3.1
