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nvmf.h: New header defining ioctls for NVMe over Fabrics

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This defines structures, ioctl commands, and related constants used
for both the Fabrics host and controller.

Reviewed by:	imp
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D44706
This commit is contained in:
John Baldwin 2024-05-02 16:27:13 -07:00
parent 52d5738dc5
commit d86edc181a
2 changed files with 81 additions and 0 deletions
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2
sys/dev/nvme/nvme.h
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@ -44,6 +44,8 @@
#define NVME_IO_TEST _IOWR('n', 100, struct nvme_io_test)
#define NVME_BIO_TEST _IOWR('n', 101, struct nvme_io_test)
/* NB: Fabrics-specific ioctls defined in nvmf.h start at 200. */
/*
* Macros to deal with NVME revisions, as defined VS register
*/

79
sys/dev/nvmf/nvmf.h Normal file
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@ -0,0 +1,79 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2022-2024 Chelsio Communications, Inc.
* Written by: John Baldwin <jhb@FreeBSD.org>
*/
#ifndef __NVMF_H__
#define __NVMF_H__
#include <sys/ioccom.h>
#ifndef _KERNEL
#include <stdbool.h>
#endif
/*
* Default settings in Fabrics controllers. These match values used by the
* Linux target.
*/
#define NVMF_MAX_IO_ENTRIES (1024)
#define NVMF_CC_EN_TIMEOUT (15) /* In 500ms units */
/* Allows for a 16k data buffer + SQE */
#define NVMF_IOCCSZ (sizeof(struct nvme_command) + 16 * 1024)
#define NVMF_IORCSZ (sizeof(struct nvme_completion))
#define NVMF_NN (1024)
struct nvmf_handoff_qpair_params {
bool admin;
bool sq_flow_control;
u_int qsize;
uint16_t sqhd;
uint16_t sqtail; /* host only */
union {
struct {
int fd;
uint8_t rxpda;
uint8_t txpda;
bool header_digests;
bool data_digests;
uint32_t maxr2t;
uint32_t maxh2cdata;
uint32_t max_icd;
} tcp;
};
};
struct nvmf_handoff_host {
u_int trtype;
u_int num_io_queues;
u_int kato;
struct nvmf_handoff_qpair_params admin;
struct nvmf_handoff_qpair_params *io;
const struct nvme_controller_data *cdata;
};
struct nvmf_reconnect_params {
uint16_t cntlid;
char subnqn[256];
};
struct nvmf_handoff_controller_qpair {
u_int trtype;
struct nvmf_handoff_qpair_params params;
const struct nvmf_fabric_connect_cmd *cmd;
const struct nvmf_fabric_connect_data *data;
};
/* Operations on /dev/nvmf */
#define NVMF_HANDOFF_HOST _IOW('n', 200, struct nvmf_handoff_host)
#define NVMF_DISCONNECT_HOST _IOW('n', 201, const char *)
#define NVMF_DISCONNECT_ALL _IO('n', 202)
/* Operations on /dev/nvmeX */
#define NVMF_RECONNECT_PARAMS _IOR('n', 203, struct nvmf_reconnect_params)
#define NVMF_RECONNECT_HOST _IOW('n', 204, struct nvmf_handoff_host)
#endif /* !__NVMF_H__ */