linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

/*

 * NVMe over Fabrics common host code.

 * Copyright (c) 2015-2016 HGST, a Western Digital Company.

 */

#ifndef _NVME_FABRICS_H

#define _NVME_FABRICS_H 1

​

#include <linux/in.h>

#include <linux/inet.h>

​

#define NVMF_MIN_QUEUE_SIZE 16

#define NVMF_MAX_QUEUE_SIZE 1024

#define NVMF_DEF_QUEUE_SIZE 128

#define NVMF_DEF_RECONNECT_DELAY    10

/* default to 600 seconds of reconnect attempts before giving up */

#define NVMF_DEF_CTRL_LOSS_TMO      600

​

/*

 * Define a host as seen by the target.  We allocate one at boot, but also

 * allow the override it when creating controllers.  This is both to provide

 * persistence of the Host NQN over multiple boots, and to allow using

 * multiple ones, for example in a container scenario.  Because we must not

 * use different Host NQNs with the same Host ID we generate a Host ID and

 * use this structure to keep track of the relation between the two.

 */

struct nvmf_host {

    struct kref     ref;

    struct list_head    list;

    char            nqn[NVMF_NQN_SIZE];

    uuid_t          id;

};

​

/**

 * enum nvmf_parsing_opts - used to define the sysfs parsing options used.

 */

enum {

    NVMF_OPT_ERR        = 0,

    NVMF_OPT_TRANSPORT  = 1 << 0,

    NVMF_OPT_NQN        = 1 << 1,

    NVMF_OPT_TRADDR     = 1 << 2,

    NVMF_OPT_TRSVCID    = 1 << 3,

    NVMF_OPT_QUEUE_SIZE = 1 << 4,

    NVMF_OPT_NR_IO_QUEUES   = 1 << 5,

    NVMF_OPT_TL_RETRY_COUNT = 1 << 6,

    NVMF_OPT_KATO       = 1 << 7,

    NVMF_OPT_HOSTNQN    = 1 << 8,

    NVMF_OPT_RECONNECT_DELAY = 1 << 9,

    NVMF_OPT_HOST_TRADDR    = 1 << 10,

    NVMF_OPT_CTRL_LOSS_TMO  = 1 << 11,

    NVMF_OPT_HOST_ID    = 1 << 12,

    NVMF_OPT_DUP_CONNECT    = 1 << 13,

    NVMF_OPT_DISABLE_SQFLOW = 1 << 14,

    NVMF_OPT_HDR_DIGEST = 1 << 15,

    NVMF_OPT_DATA_DIGEST    = 1 << 16,

    NVMF_OPT_NR_WRITE_QUEUES = 1 << 17,

    NVMF_OPT_NR_POLL_QUEUES = 1 << 18,

};

​

/**

 * struct nvmf_ctrl_options - Used to hold the options specified

 *                with the parsing opts enum.

 * @mask:   Used by the fabrics library to parse through sysfs options