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169 lines
4.2 KiB
169 lines
4.2 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (c) 2010 Cisco Systems, Inc. |
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*/ |
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#ifndef __TCM_FC_H__ |
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#define __TCM_FC_H__ |
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#include <linux/types.h> |
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#include <target/target_core_base.h> |
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#define FT_VERSION "0.4" |
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#define FT_NAMELEN 32 /* length of ASCII WWPNs including pad */ |
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#define FT_TPG_NAMELEN 32 /* max length of TPG name */ |
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#define FT_LUN_NAMELEN 32 /* max length of LUN name */ |
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#define TCM_FC_DEFAULT_TAGS 512 /* tags used for per-session preallocation */ |
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struct ft_transport_id { |
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__u8 format; |
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__u8 __resvd1[7]; |
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__u8 wwpn[8]; |
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__u8 __resvd2[8]; |
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} __attribute__((__packed__)); |
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/* |
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* Session (remote port). |
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*/ |
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struct ft_sess { |
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u32 port_id; /* for hash lookup use only */ |
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u32 params; |
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u16 max_frame; /* maximum frame size */ |
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u64 port_name; /* port name for transport ID */ |
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struct ft_tport *tport; |
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struct se_session *se_sess; |
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struct hlist_node hash; /* linkage in ft_sess_hash table */ |
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struct rcu_head rcu; |
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struct kref kref; /* ref for hash and outstanding I/Os */ |
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}; |
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/* |
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* Hash table of sessions per local port. |
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* Hash lookup by remote port FC_ID. |
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*/ |
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#define FT_SESS_HASH_BITS 6 |
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#define FT_SESS_HASH_SIZE (1 << FT_SESS_HASH_BITS) |
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/* |
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* Per local port data. |
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* This is created only after a TPG exists that allows target function |
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* for the local port. If the TPG exists, this is allocated when |
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* we're notified that the local port has been created, or when |
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* the first PRLI provider callback is received. |
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*/ |
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struct ft_tport { |
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struct fc_lport *lport; |
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struct ft_tpg *tpg; /* NULL if TPG deleted before tport */ |
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u32 sess_count; /* number of sessions in hash */ |
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struct rcu_head rcu; |
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struct hlist_head hash[FT_SESS_HASH_SIZE]; /* list of sessions */ |
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}; |
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/* |
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* Node ID and authentication. |
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*/ |
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struct ft_node_auth { |
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u64 port_name; |
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u64 node_name; |
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}; |
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/* |
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* Node ACL for FC remote port session. |
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*/ |
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struct ft_node_acl { |
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struct se_node_acl se_node_acl; |
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struct ft_node_auth node_auth; |
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}; |
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struct ft_lun { |
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u32 index; |
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char name[FT_LUN_NAMELEN]; |
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}; |
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/* |
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* Target portal group (local port). |
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*/ |
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struct ft_tpg { |
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u32 index; |
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struct ft_lport_wwn *lport_wwn; |
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struct ft_tport *tport; /* active tport or NULL */ |
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struct list_head lun_list; /* head of LUNs */ |
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struct se_portal_group se_tpg; |
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struct workqueue_struct *workqueue; |
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}; |
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struct ft_lport_wwn { |
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u64 wwpn; |
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char name[FT_NAMELEN]; |
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struct list_head ft_wwn_node; |
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struct ft_tpg *tpg; |
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struct se_wwn se_wwn; |
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}; |
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/* |
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* Commands |
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*/ |
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struct ft_cmd { |
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struct ft_sess *sess; /* session held for cmd */ |
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struct fc_seq *seq; /* sequence in exchange mgr */ |
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struct se_cmd se_cmd; /* Local TCM I/O descriptor */ |
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struct fc_frame *req_frame; |
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u32 write_data_len; /* data received on writes */ |
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struct work_struct work; |
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/* Local sense buffer */ |
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unsigned char ft_sense_buffer[TRANSPORT_SENSE_BUFFER]; |
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u32 was_ddp_setup:1; /* Set only if ddp is setup */ |
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u32 aborted:1; /* Set if aborted by reset or timeout */ |
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struct scatterlist *sg; /* Set only if DDP is setup */ |
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u32 sg_cnt; /* No. of item in scatterlist */ |
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}; |
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extern struct mutex ft_lport_lock; |
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extern struct fc4_prov ft_prov; |
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extern unsigned int ft_debug_logging; |
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/* |
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* Fabric methods. |
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*/ |
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/* |
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* Session ops. |
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*/ |
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void ft_sess_put(struct ft_sess *); |
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void ft_sess_close(struct se_session *); |
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u32 ft_sess_get_index(struct se_session *); |
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u32 ft_sess_get_port_name(struct se_session *, unsigned char *, u32); |
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void ft_lport_add(struct fc_lport *, void *); |
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void ft_lport_del(struct fc_lport *, void *); |
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int ft_lport_notify(struct notifier_block *, unsigned long, void *); |
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/* |
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* IO methods. |
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*/ |
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int ft_check_stop_free(struct se_cmd *); |
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void ft_release_cmd(struct se_cmd *); |
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int ft_queue_status(struct se_cmd *); |
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int ft_queue_data_in(struct se_cmd *); |
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int ft_write_pending(struct se_cmd *); |
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int ft_get_cmd_state(struct se_cmd *); |
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void ft_queue_tm_resp(struct se_cmd *); |
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void ft_aborted_task(struct se_cmd *); |
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/* |
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* other internal functions. |
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*/ |
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void ft_recv_req(struct ft_sess *, struct fc_frame *); |
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struct ft_tpg *ft_lport_find_tpg(struct fc_lport *); |
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void ft_recv_write_data(struct ft_cmd *, struct fc_frame *); |
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void ft_dump_cmd(struct ft_cmd *, const char *caller); |
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ssize_t ft_format_wwn(char *, size_t, u64); |
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/* |
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* Underlying HW specific helper function |
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*/ |
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void ft_invl_hw_context(struct ft_cmd *); |
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#endif /* __TCM_FC_H__ */
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