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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright (c) 2010 Cisco Systems, Inc.4 */5#ifndef __TCM_FC_H__6#define __TCM_FC_H__7 8#include <linux/types.h>9#include <target/target_core_base.h>10 11#define FT_VERSION "0.4"12 13#define FT_NAMELEN 32 /* length of ASCII WWPNs including pad */14#define FT_TPG_NAMELEN 32 /* max length of TPG name */15#define FT_LUN_NAMELEN 32 /* max length of LUN name */16#define TCM_FC_DEFAULT_TAGS 512 /* tags used for per-session preallocation */17 18struct ft_transport_id {19 __u8 format;20 __u8 __resvd1[7];21 __u8 wwpn[8];22 __u8 __resvd2[8];23} __attribute__((__packed__));24 25/*26 * Session (remote port).27 */28struct ft_sess {29 u32 port_id; /* for hash lookup use only */30 u32 params;31 u16 max_frame; /* maximum frame size */32 u64 port_name; /* port name for transport ID */33 struct ft_tport *tport;34 struct se_session *se_sess;35 struct hlist_node hash; /* linkage in ft_sess_hash table */36 struct rcu_head rcu;37 struct kref kref; /* ref for hash and outstanding I/Os */38};39 40/*41 * Hash table of sessions per local port.42 * Hash lookup by remote port FC_ID.43 */44#define FT_SESS_HASH_BITS 645#define FT_SESS_HASH_SIZE (1 << FT_SESS_HASH_BITS)46 47/*48 * Per local port data.49 * This is created only after a TPG exists that allows target function50 * for the local port. If the TPG exists, this is allocated when51 * we're notified that the local port has been created, or when52 * the first PRLI provider callback is received.53 */54struct ft_tport {55 struct fc_lport *lport;56 struct ft_tpg *tpg; /* NULL if TPG deleted before tport */57 u32 sess_count; /* number of sessions in hash */58 struct rcu_head rcu;59 struct hlist_head hash[FT_SESS_HASH_SIZE]; /* list of sessions */60};61 62/*63 * Node ID and authentication.64 */65struct ft_node_auth {66 u64 port_name;67 u64 node_name;68};69 70/*71 * Node ACL for FC remote port session.72 */73struct ft_node_acl {74 struct se_node_acl se_node_acl;75 struct ft_node_auth node_auth;76};77 78struct ft_lun {79 u32 index;80 char name[FT_LUN_NAMELEN];81};82 83/*84 * Target portal group (local port).85 */86struct ft_tpg {87 u32 index;88 struct ft_lport_wwn *lport_wwn;89 struct ft_tport *tport; /* active tport or NULL */90 struct list_head lun_list; /* head of LUNs */91 struct se_portal_group se_tpg;92 struct workqueue_struct *workqueue;93};94 95struct ft_lport_wwn {96 u64 wwpn;97 char name[FT_NAMELEN];98 struct list_head ft_wwn_node;99 struct ft_tpg *tpg;100 struct se_wwn se_wwn;101};102 103/*104 * Commands105 */106struct ft_cmd {107 struct ft_sess *sess; /* session held for cmd */108 struct fc_seq *seq; /* sequence in exchange mgr */109 struct se_cmd se_cmd; /* Local TCM I/O descriptor */110 struct fc_frame *req_frame;111 u32 write_data_len; /* data received on writes */112 struct work_struct work;113 /* Local sense buffer */114 unsigned char ft_sense_buffer[TRANSPORT_SENSE_BUFFER];115 u32 was_ddp_setup:1; /* Set only if ddp is setup */116 u32 aborted:1; /* Set if aborted by reset or timeout */117 struct scatterlist *sg; /* Set only if DDP is setup */118 u32 sg_cnt; /* No. of item in scatterlist */119};120 121extern struct mutex ft_lport_lock;122extern struct fc4_prov ft_prov;123extern unsigned int ft_debug_logging;124 125/*126 * Fabric methods.127 */128 129/*130 * Session ops.131 */132void ft_sess_put(struct ft_sess *);133void ft_sess_close(struct se_session *);134u32 ft_sess_get_index(struct se_session *);135u32 ft_sess_get_port_name(struct se_session *, unsigned char *, u32);136 137void ft_lport_add(struct fc_lport *, void *);138void ft_lport_del(struct fc_lport *, void *);139int ft_lport_notify(struct notifier_block *, unsigned long, void *);140 141/*142 * IO methods.143 */144int ft_check_stop_free(struct se_cmd *);145void ft_release_cmd(struct se_cmd *);146int ft_queue_status(struct se_cmd *);147int ft_queue_data_in(struct se_cmd *);148int ft_write_pending(struct se_cmd *);149void ft_queue_tm_resp(struct se_cmd *);150void ft_aborted_task(struct se_cmd *);151 152/*153 * other internal functions.154 */155void ft_recv_req(struct ft_sess *, struct fc_frame *);156struct ft_tpg *ft_lport_find_tpg(struct fc_lport *);157 158void ft_recv_write_data(struct ft_cmd *, struct fc_frame *);159void ft_dump_cmd(struct ft_cmd *, const char *caller);160 161ssize_t ft_format_wwn(char *, size_t, u64);162 163/*164 * Underlying HW specific helper function165 */166void ft_invl_hw_context(struct ft_cmd *);167 168#endif /* __TCM_FC_H__ */169