diff options
Diffstat (limited to 'drivers/target/tcm_fc/tcm_fc.h')
| -rw-r--r-- | drivers/target/tcm_fc/tcm_fc.h | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/drivers/target/tcm_fc/tcm_fc.h b/drivers/target/tcm_fc/tcm_fc.h new file mode 100644 index 000000000..11d27b93b --- /dev/null +++ b/drivers/target/tcm_fc/tcm_fc.h @@ -0,0 +1,182 @@ +/* + * Copyright (c) 2010 Cisco Systems, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + */ +#ifndef __TCM_FC_H__ +#define __TCM_FC_H__ + +#include <linux/types.h> +#include <target/target_core_base.h> + +#define FT_VERSION "0.4" + +#define FT_NAMELEN 32 /* length of ASCII WWPNs including pad */ +#define FT_TPG_NAMELEN 32 /* max length of TPG name */ +#define FT_LUN_NAMELEN 32 /* max length of LUN name */ +#define TCM_FC_DEFAULT_TAGS 512 /* tags used for per-session preallocation */ + +struct ft_transport_id { + __u8 format; + __u8 __resvd1[7]; + __u8 wwpn[8]; + __u8 __resvd2[8]; +} __attribute__((__packed__)); + +/* + * Session (remote port). + */ +struct ft_sess { + u32 port_id; /* for hash lookup use only */ + u32 params; + u16 max_frame; /* maximum frame size */ + u64 port_name; /* port name for transport ID */ + struct ft_tport *tport; + struct se_session *se_sess; + struct hlist_node hash; /* linkage in ft_sess_hash table */ + struct rcu_head rcu; + struct kref kref; /* ref for hash and outstanding I/Os */ +}; + +/* + * Hash table of sessions per local port. + * Hash lookup by remote port FC_ID. + */ +#define FT_SESS_HASH_BITS 6 +#define FT_SESS_HASH_SIZE (1 << FT_SESS_HASH_BITS) + +/* + * Per local port data. + * This is created only after a TPG exists that allows target function + * for the local port. If the TPG exists, this is allocated when + * we're notified that the local port has been created, or when + * the first PRLI provider callback is received. + */ +struct ft_tport { + struct fc_lport *lport; + struct ft_tpg *tpg; /* NULL if TPG deleted before tport */ + u32 sess_count; /* number of sessions in hash */ + struct rcu_head rcu; + struct hlist_head hash[FT_SESS_HASH_SIZE]; /* list of sessions */ +}; + +/* + * Node ID and authentication. + */ +struct ft_node_auth { + u64 port_name; + u64 node_name; +}; + +/* + * Node ACL for FC remote port session. + */ +struct ft_node_acl { + struct se_node_acl se_node_acl; + struct ft_node_auth node_auth; +}; + +struct ft_lun { + u32 index; + char name[FT_LUN_NAMELEN]; +}; + +/* + * Target portal group (local port). + */ +struct ft_tpg { + u32 index; + struct ft_lport_wwn *lport_wwn; + struct ft_tport *tport; /* active tport or NULL */ + struct list_head lun_list; /* head of LUNs */ + struct se_portal_group se_tpg; + struct workqueue_struct *workqueue; +}; + +struct ft_lport_wwn { + u64 wwpn; + char name[FT_NAMELEN]; + struct list_head ft_wwn_node; + struct ft_tpg *tpg; + struct se_wwn se_wwn; +}; + +/* + * Commands + */ +struct ft_cmd { + struct ft_sess *sess; /* session held for cmd */ + struct fc_seq *seq; /* sequence in exchange mgr */ + struct se_cmd se_cmd; /* Local TCM I/O descriptor */ + struct fc_frame *req_frame; + u32 write_data_len; /* data received on writes */ + struct work_struct work; + /* Local sense buffer */ + unsigned char ft_sense_buffer[TRANSPORT_SENSE_BUFFER]; + u32 was_ddp_setup:1; /* Set only if ddp is setup */ + u32 aborted:1; /* Set if aborted by reset or timeout */ + struct scatterlist *sg; /* Set only if DDP is setup */ + u32 sg_cnt; /* No. of item in scatterlist */ +}; + +extern struct mutex ft_lport_lock; +extern struct fc4_prov ft_prov; +extern unsigned int ft_debug_logging; + +/* + * Fabric methods. + */ + +/* + * Session ops. + */ +void ft_sess_put(struct ft_sess *); +void ft_sess_close(struct se_session *); +u32 ft_sess_get_index(struct se_session *); +u32 ft_sess_get_port_name(struct se_session *, unsigned char *, u32); + +void ft_lport_add(struct fc_lport *, void *); +void ft_lport_del(struct fc_lport *, void *); +int ft_lport_notify(struct notifier_block *, unsigned long, void *); + +/* + * IO methods. + */ +int ft_check_stop_free(struct se_cmd *); +void ft_release_cmd(struct se_cmd *); +int ft_queue_status(struct se_cmd *); +int ft_queue_data_in(struct se_cmd *); +int ft_write_pending(struct se_cmd *); +int ft_write_pending_status(struct se_cmd *); +int ft_get_cmd_state(struct se_cmd *); +void ft_queue_tm_resp(struct se_cmd *); +void ft_aborted_task(struct se_cmd *); + +/* + * other internal functions. + */ +void ft_recv_req(struct ft_sess *, struct fc_frame *); +struct ft_tpg *ft_lport_find_tpg(struct fc_lport *); + +void ft_recv_write_data(struct ft_cmd *, struct fc_frame *); +void ft_dump_cmd(struct ft_cmd *, const char *caller); + +ssize_t ft_format_wwn(char *, size_t, u64); + +/* + * Underlying HW specific helper function + */ +void ft_invl_hw_context(struct ft_cmd *); + +#endif /* __TCM_FC_H__ */ |