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From: "Pei, Andy" <andy.pei@intel.com>
To: "Xia, Chenbo" <chenbo.xia@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
CC: "maxime.coquelin@redhat.com" <maxime.coquelin@redhat.com>, "Cao, Gang"
<gang.cao@intel.com>, "Liu, Changpeng" <changpeng.liu@intel.com>
Subject: RE: [PATCH v6 07/16] examples/vdpa: add vDPA blk support in example
Thread-Topic: [PATCH v6 07/16] examples/vdpa: add vDPA blk support in example
Thread-Index: AQHYVWD+zxtJ2lbyyEqxwOZglErt6q0ApY0wgAKIuWA=
Date: Wed, 27 Apr 2022 04:11:01 +0000
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Hi Chenbo,
Thanks for your reply.
My reply is inline.
> -----Original Message-----
> From: Xia, Chenbo <chenbo.xia@intel.com>
> Sent: Monday, April 25, 2022 9:39 PM
> To: Pei, Andy <andy.pei@intel.com>; dev@dpdk.org
> Cc: maxime.coquelin@redhat.com; Cao, Gang <gang.cao@intel.com>; Liu,
> Changpeng <changpeng.liu@intel.com>
> Subject: RE: [PATCH v6 07/16] examples/vdpa: add vDPA blk support in
> example
>=20
> Hi Andy,
>=20
> > -----Original Message-----
> > From: Pei, Andy <andy.pei@intel.com>
> > Sent: Thursday, April 21, 2022 4:34 PM
> > To: dev@dpdk.org
> > Cc: Xia, Chenbo <chenbo.xia@intel.com>; maxime.coquelin@redhat.com;
> > Cao, Gang <gang.cao@intel.com>; Liu, Changpeng
> > <changpeng.liu@intel.com>
> > Subject: [PATCH v6 07/16] examples/vdpa: add vDPA blk support in
> > example
> >
> > Add virtio blk device support to vDPA example.
> >
> > Signed-off-by: Andy Pei <andy.pei@intel.com>
> > ---
> > examples/vdpa/main.c | 61 +++++++++++++-
> > examples/vdpa/vdpa_blk_compact.h | 72 +++++++++++++++++
> > examples/vdpa/vhost_user.h | 169
> > +++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 301 insertions(+), 1 deletion(-) create mode 100644
> > examples/vdpa/vdpa_blk_compact.h create mode 100644
> > examples/vdpa/vhost_user.h
> >
> > diff --git a/examples/vdpa/main.c b/examples/vdpa/main.c index
> > 5ab0765..1c809ab 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
> > @@ -41,6 +42,7 @@ struct vdpa_port {
> > static int devcnt;
> > static int interactive;
> > static int client_mode;
> > +static int isblk;
> >
> > /* display usage */
> > static void
> > @@ -49,7 +51,8 @@ struct vdpa_port {
> > printf("Usage: %s [EAL options] -- "
> > " --interactive|-i: run in interactive
> > mode.\n"
> > " --iface <path>: specify the path prefix
> of
> > the socket files, e.g. /tmp/vhost-user-.\n"
> > - " --client: register a vhost-user socket
> as
> > client mode.\n",
> > + " --client: register a vhost-user socket
> as
> > client mode.\n"
> > + " --isblk: device is a block device, e.g.
> > virtio_blk device.\n",
> > prgname);
> > }
> >
> > @@ -61,6 +64,7 @@ struct vdpa_port {
> > {"iface", required_argument, NULL, 0},
> > {"interactive", no_argument, &interactive, 1},
> > {"client", no_argument, &client_mode, 1},
> > + {"isblk", no_argument, &isblk, 1},
>=20
> I think a new API for get_device_type will be better than asking user to
> specify the device type.
>=20
Good suggestion. I will send out a version of patch set and try to do this.
> > {NULL, 0, 0, 0},
> > };
> > int opt, idx;
> > @@ -159,6 +163,52 @@ struct vdpa_port { };
> >
> > static int
> > +vdpa_blk_device_set_features_and_protocol(const char *path) {
> > + uint64_t protocol_features =3D 0;
> > + int ret;
> > +
> > + ret =3D rte_vhost_driver_set_features(path,
> VHOST_BLK_FEATURES_BASE);
> > + if (ret !=3D 0) {
> > + RTE_LOG(ERR, VDPA,
> > + "rte_vhost_driver_set_features for %s failed.\n",
> > + path);
> > + goto out;
> > + }
> > +
> > + ret =3D rte_vhost_driver_disable_features(path,
> > + VHOST_VDPA_BLK_DISABLED_FEATURES);
> > + if (ret !=3D 0) {
> > + RTE_LOG(ERR, VDPA,
> > + "rte_vhost_driver_disable_features for %s failed.\n",
> > + path);
> > + goto out;
> > + }
> > +
> > + ret =3D rte_vhost_driver_get_protocol_features(path,
> > &protocol_features);
> > + if (ret !=3D 0) {
> > + RTE_LOG(ERR, VDPA,
> > + "rte_vhost_driver_get_protocol_features for %s
> > failed.\n",
> > + path);
> > + goto out;
> > + }
> > +
> > + protocol_features |=3D (1ULL << VHOST_USER_PROTOCOL_F_CONFIG);
> > + protocol_features |=3D (1ULL <<
> VHOST_USER_PROTOCOL_F_LOG_SHMFD);
> > +
> > + ret =3D rte_vhost_driver_set_protocol_features(path,
> > protocol_features);
> > + if (ret !=3D 0) {
> > + RTE_LOG(ERR, VDPA,
> > + "rte_vhost_driver_set_protocol_features for %s
> > failed.\n",
> > + path);
> > + goto out;
> > + }
> > +
> > +out:
> > + return ret;
> > +}
> > +
> > +static int
> > start_vdpa(struct vdpa_port *vport)
> > {
> > int ret;
> > @@ -192,6 +242,15 @@ struct vdpa_port {
> > "attach vdpa device failed: %s\n",
> > socket_path);
> >
> > + if (isblk) {
> > + RTE_LOG(NOTICE, VDPA, "is a blk device\n");
> > + ret =3D
> vdpa_blk_device_set_features_and_protocol(socket_path);
> > + if (ret !=3D 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
>=20
> Please remove unused definition in this header. I didn't check all, but i=
t
> seems at least VHOST_BLK_PROTOCOL_FEATURES is not used.
>=20
Sure. I will remove all unused definition.
> > new file mode 100644
> > index 0000000..e7c0f22
> > --- /dev/null
> > +++ b/examples/vdpa/vdpa_blk_compact.h
> > @@ -0,0 +1,72 @@
> > +/* 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
> > + */
> > +
> > +#include <stdbool.h>
> > +
> > +#include <rte_pci.h>
> > +#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_RO 5 /* Disk is read-only */
> > +#define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is availa=
ble
> > */
> > +#define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is
> > available */
> > +#define VIRTIO_BLK_F_MQ 12 /* support more than one vq */
> > +#define VIRTIO_BLK_F_DISCARD 13 /* DISCARD is supported */
> > +#define VIRTIO_BLK_F_WRITE_ZEROES 14 /* WRITE ZEROES is supported
> */
> > +
> > +/* Legacy feature bits */
> > +#ifndef VIRTIO_BLK_NO_LEGACY
> > +#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? =
*/
> > +#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passth=
ru
> > */
> > +#define VIRTIO_BLK_F_FLUSH 9 /* Flush command supported */
> > +#define VIRTIO_BLK_F_CONFIG_WCE 11 /* Writeback mode available in
> > config */
> > +
> > +/* Old (deprecated) name for VIRTIO_BLK_F_FLUSH. */ #define
> > +VIRTIO_BLK_F_WCE VIRTIO_BLK_F_FLUSH #endif
> /* !VIRTIO_BLK_NO_LEGACY
> > +*/
> > +
> > +#ifndef VHOST_USER_F_PROTOCOL_FEATURES #define
> > +VHOST_USER_F_PROTOCOL_FEATURES 30 #endif
> > +
> > +#define VHOST_BLK_FEATURES ((1ULL << VHOST_F_LOG_ALL) | \
> > + (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
> > + (1ULL << VIRTIO_F_VERSION_1) | \
> > + (1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \
> > + (1ULL << VIRTIO_RING_F_EVENT_IDX) | \
> > + (1ULL << VIRTIO_RING_F_INDIRECT_DESC))
> > +
> > +#define VHOST_BLK_DISABLED_FEATURES ((1ULL <<
> > +VIRTIO_RING_F_EVENT_IDX) |
> > \
> > + (1ULL << VIRTIO_F_NOTIFY_ON_EMPTY))
> > +
> > +#define VHOST_BLK_FEATURES_BASE (VHOST_BLK_FEATURES | \
> > + (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_VDPA_BLK_DISABLED_FEATURES
> (VHOST_BLK_DISABLED_FEATURES | \
> > + (1ULL << VIRTIO_BLK_F_GEOMETRY) | (1ULL <<
> VIRTIO_BLK_F_CONFIG_WCE)
> > | \
> > + (1ULL << VIRTIO_BLK_F_BARRIER) | (1ULL << VIRTIO_BLK_F_SCSI))
> > +
> > +/* Vhost-blk support protocol features */ #define
> > +VHOST_BLK_PROTOCOL_FEATURES \
> > + ((1ULL << VHOST_USER_PROTOCOL_F_CONFIG) | \
> > + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))
> > +
> > +#endif /* _VDPA_BLK_COMPACT_H_ */
> > diff --git a/examples/vdpa/vhost_user.h b/examples/vdpa/vhost_user.h
> > new file mode 100644 index 0000000..137bbc2
> > --- /dev/null
> > +++ b/examples/vdpa/vhost_user.h
>=20
> I don't understand, why introduce this header? It seems never used.
>=20
Sure. I will remove this file.
> Thanks,
> Chenbo
>=20
> > @@ -0,0 +1,169 @@
> > +/* SPDX-License-Identifier: BSD-3-Clause
> > + * Copyright(c) 2022 Intel Corporation
> > + */
> > +
> > +#ifndef _VHOST_NET_USER_H
> > +#define _VHOST_NET_USER_H
> > +
> > +#include <stdint.h>
> > +#include <linux/vhost.h>
> > +
> > +#include "rte_vhost.h"
> > +
> > +/* refer to hw/virtio/vhost-user.c */
> > +
> > +#define VHOST_MEMORY_MAX_NREGIONS 8
> > +
> > +#ifndef VHOST_USER_MAX_CONFIG_SIZE
> > +#define VHOST_USER_MAX_CONFIG_SIZE 256
> > +#endif
> > +
> > +#define VHOST_USER_PROTOCOL_FEATURES ((1ULL <<
> > VHOST_USER_PROTOCOL_F_MQ) | \
> > + (1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD)
> |\
> > + (1ULL << VHOST_USER_PROTOCOL_F_RARP) | \
> > + (1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK) | \
> > + (1ULL << VHOST_USER_PROTOCOL_F_NET_MTU) | \
> > + (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ) | \
> > + (1ULL <<
> VHOST_USER_PROTOCOL_F_CRYPTO_SESSION) | \
> > + (1ULL <<
> VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD) | \
> > + (1ULL <<
> VHOST_USER_PROTOCOL_F_HOST_NOTIFIER) | \
> > + (1ULL << VHOST_USER_PROTOCOL_F_PAGEFAULT))
> > +
> > +typedef enum VhostUserRequest {
> > + VHOST_USER_NONE =3D 0,
> > + VHOST_USER_GET_FEATURES =3D 1,
> > + VHOST_USER_SET_FEATURES =3D 2,
> > + VHOST_USER_SET_OWNER =3D 3,
> > + VHOST_USER_RESET_OWNER =3D 4,
> > + VHOST_USER_SET_MEM_TABLE =3D 5,
> > + VHOST_USER_SET_LOG_BASE =3D 6,
> > + VHOST_USER_SET_LOG_FD =3D 7,
> > + VHOST_USER_SET_VRING_NUM =3D 8,
> > + VHOST_USER_SET_VRING_ADDR =3D 9,
> > + VHOST_USER_SET_VRING_BASE =3D 10,
> > + VHOST_USER_GET_VRING_BASE =3D 11,
> > + VHOST_USER_SET_VRING_KICK =3D 12,
> > + VHOST_USER_SET_VRING_CALL =3D 13,
> > + VHOST_USER_SET_VRING_ERR =3D 14,
> > + VHOST_USER_GET_PROTOCOL_FEATURES =3D 15,
> > + VHOST_USER_SET_PROTOCOL_FEATURES =3D 16,
> > + VHOST_USER_GET_QUEUE_NUM =3D 17,
> > + VHOST_USER_SET_VRING_ENABLE =3D 18,
> > + VHOST_USER_SEND_RARP =3D 19,
> > + VHOST_USER_NET_SET_MTU =3D 20,
> > + VHOST_USER_SET_SLAVE_REQ_FD =3D 21,
> > + VHOST_USER_IOTLB_MSG =3D 22,
> > + VHOST_USER_CRYPTO_CREATE_SESS =3D 26,
> > + VHOST_USER_CRYPTO_CLOSE_SESS =3D 27,
> > + VHOST_USER_POSTCOPY_ADVISE =3D 28,
> > + VHOST_USER_POSTCOPY_LISTEN =3D 29,
> > + VHOST_USER_POSTCOPY_END =3D 30,
> > + VHOST_USER_GET_INFLIGHT_FD =3D 31,
> > + VHOST_USER_SET_INFLIGHT_FD =3D 32,
> > + VHOST_USER_MAX =3D 33
> > +} VhostUserRequest;
> > +
> > +typedef enum VhostUserSlaveRequest {
> > + VHOST_USER_SLAVE_NONE =3D 0,
> > + VHOST_USER_SLAVE_IOTLB_MSG =3D 1,
> > + VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG =3D 3,
> > + VHOST_USER_SLAVE_MAX
> > +} VhostUserSlaveRequest;
> > +
> > +typedef struct VhostUserMemoryRegion {
> > + uint64_t guest_phys_addr;
> > + uint64_t memory_size;
> > + uint64_t userspace_addr;
> > + uint64_t mmap_offset;
> > +} VhostUserMemoryRegion;
> > +
> > +typedef struct VhostUserMemory {
> > + uint32_t nregions;
> > + uint32_t padding;
> > + VhostUserMemoryRegion
> regions[VHOST_MEMORY_MAX_NREGIONS];
> > +} VhostUserMemory;
> > +
> > +typedef struct VhostUserLog {
> > + uint64_t mmap_size;
> > + uint64_t mmap_offset;
> > +} VhostUserLog;
> > +
> > +/* Comply with Cryptodev-Linux */
> > +#define VHOST_USER_CRYPTO_MAX_HMAC_KEY_LENGTH 512
> > +#define VHOST_USER_CRYPTO_MAX_CIPHER_KEY_LENGTH 64
> > +
> > +/* Same structure as vhost-user backend session info */
> > +typedef struct VhostUserCryptoSessionParam {
> > + int64_t session_id;
> > + uint32_t op_code;
> > + uint32_t cipher_algo;
> > + uint32_t cipher_key_len;
> > + uint32_t hash_algo;
> > + uint32_t digest_len;
> > + uint32_t auth_key_len;
> > + uint32_t aad_len;
> > + uint8_t op_type;
> > + uint8_t dir;
> > + uint8_t hash_mode;
> > + uint8_t chaining_dir;
> > + uint8_t *ciphe_key;
> > + uint8_t *auth_key;
> > + uint8_t
> cipher_key_buf[VHOST_USER_CRYPTO_MAX_CIPHER_KEY_LENGTH];
> > + uint8_t
> auth_key_buf[VHOST_USER_CRYPTO_MAX_HMAC_KEY_LENGTH];
> > +} VhostUserCryptoSessionParam;
> > +
> > +typedef struct VhostUserVringArea {
> > + uint64_t u64;
> > + uint64_t size;
> > + uint64_t offset;
> > +} VhostUserVringArea;
> > +
> > +typedef struct VhostUserInflight {
> > + uint64_t mmap_size;
> > + uint64_t mmap_offset;
> > + uint16_t num_queues;
> > + uint16_t queue_size;
> > +} VhostUserInflight;
> > +
> > +/** Get/set config msg payload */
> > +struct vhost_user_config {
> > + uint32_t offset;
> > + uint32_t size;
> > + uint32_t flags;
> > + uint8_t region[VHOST_USER_MAX_CONFIG_SIZE];
> > +};
> > +
> > +typedef struct VhostUserMsg {
> > + union {
> > + uint32_t master; /* a VhostUserRequest value */
> > + uint32_t slave; /* a VhostUserSlaveRequest value*/
> > + } request;
> > +
> > +#define VHOST_USER_VERSION_MASK 0x3
> > +#define VHOST_USER_REPLY_MASK (0x1 << 2)
> > +#define VHOST_USER_NEED_REPLY (0x1 << 3)
> > + uint32_t flags;
> > + uint32_t size; /* the following payload size */
> > + union {
> > +#define VHOST_USER_VRING_IDX_MASK 0xff
> > +#define VHOST_USER_VRING_NOFD_MASK (0x1<<8)
> > + uint64_t u64;
> > + struct vhost_vring_state state;
> > + struct vhost_vring_addr addr;
> > + VhostUserMemory memory;
> > + VhostUserLog log;
> > + struct vhost_iotlb_msg iotlb;
> > + VhostUserCryptoSessionParam crypto_session;
> > + VhostUserVringArea area;
> > + VhostUserInflight inflight;
> > + struct vhost_user_config cfg;
> > + } payload;
> > + int fds[VHOST_MEMORY_MAX_NREGIONS];
> > + int fd_num;
> > +} __attribute((packed)) VhostUserMsg;
> > +
> > +#define VHOST_USER_HDR_SIZE offsetof(VhostUserMsg, payload.u64)
> > +
> > +/* The version of the protocol we support */
> > +#define VHOST_USER_VERSION 0x1
> > +#endif
> > --
> > 1.8.3.1
>=20