142e9a92fSRobert Love /* 242e9a92fSRobert Love * Copyright(c) 2007 Intel Corporation. All rights reserved. 342e9a92fSRobert Love * 442e9a92fSRobert Love * This program is free software; you can redistribute it and/or modify it 542e9a92fSRobert Love * under the terms and conditions of the GNU General Public License, 642e9a92fSRobert Love * version 2, as published by the Free Software Foundation. 742e9a92fSRobert Love * 842e9a92fSRobert Love * This program is distributed in the hope it will be useful, but WITHOUT 942e9a92fSRobert Love * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1042e9a92fSRobert Love * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 1142e9a92fSRobert Love * more details. 1242e9a92fSRobert Love * 1342e9a92fSRobert Love * You should have received a copy of the GNU General Public License along with 1442e9a92fSRobert Love * this program; if not, write to the Free Software Foundation, Inc., 1542e9a92fSRobert Love * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 1642e9a92fSRobert Love * 1742e9a92fSRobert Love * Maintained at www.Open-FCoE.org 1842e9a92fSRobert Love */ 1942e9a92fSRobert Love 2042e9a92fSRobert Love #ifndef _LIBFC_H_ 2142e9a92fSRobert Love #define _LIBFC_H_ 2242e9a92fSRobert Love 2342e9a92fSRobert Love #include <linux/timer.h> 2442e9a92fSRobert Love #include <linux/if.h> 2542e9a92fSRobert Love 2642e9a92fSRobert Love #include <scsi/scsi_transport.h> 2742e9a92fSRobert Love #include <scsi/scsi_transport_fc.h> 2842e9a92fSRobert Love 2942e9a92fSRobert Love #include <scsi/fc/fc_fcp.h> 3042e9a92fSRobert Love #include <scsi/fc/fc_ns.h> 3142e9a92fSRobert Love #include <scsi/fc/fc_els.h> 3242e9a92fSRobert Love #include <scsi/fc/fc_gs.h> 3342e9a92fSRobert Love 3442e9a92fSRobert Love #include <scsi/fc_frame.h> 3542e9a92fSRobert Love 3642e9a92fSRobert Love #define LIBFC_DEBUG 3742e9a92fSRobert Love 3842e9a92fSRobert Love #ifdef LIBFC_DEBUG 3942e9a92fSRobert Love /* Log messages */ 4042e9a92fSRobert Love #define FC_DBG(fmt, args...) \ 4142e9a92fSRobert Love do { \ 4242e9a92fSRobert Love printk(KERN_INFO "%s " fmt, __func__, ##args); \ 4342e9a92fSRobert Love } while (0) 4442e9a92fSRobert Love #else 4542e9a92fSRobert Love #define FC_DBG(fmt, args...) 4642e9a92fSRobert Love #endif 4742e9a92fSRobert Love 4842e9a92fSRobert Love /* 4942e9a92fSRobert Love * libfc error codes 5042e9a92fSRobert Love */ 5142e9a92fSRobert Love #define FC_NO_ERR 0 /* no error */ 5242e9a92fSRobert Love #define FC_EX_TIMEOUT 1 /* Exchange timeout */ 5342e9a92fSRobert Love #define FC_EX_CLOSED 2 /* Exchange closed */ 5442e9a92fSRobert Love 5542e9a92fSRobert Love /* some helpful macros */ 5642e9a92fSRobert Love 5742e9a92fSRobert Love #define ntohll(x) be64_to_cpu(x) 5842e9a92fSRobert Love #define htonll(x) cpu_to_be64(x) 5942e9a92fSRobert Love 6042e9a92fSRobert Love #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2])) 6142e9a92fSRobert Love 6242e9a92fSRobert Love #define hton24(p, v) do { \ 6342e9a92fSRobert Love p[0] = (((v) >> 16) & 0xFF); \ 6442e9a92fSRobert Love p[1] = (((v) >> 8) & 0xFF); \ 6542e9a92fSRobert Love p[2] = ((v) & 0xFF); \ 6642e9a92fSRobert Love } while (0) 6742e9a92fSRobert Love 6842e9a92fSRobert Love /* 6942e9a92fSRobert Love * FC HBA status 7042e9a92fSRobert Love */ 7142e9a92fSRobert Love #define FC_PAUSE (1 << 1) 7242e9a92fSRobert Love #define FC_LINK_UP (1 << 0) 7342e9a92fSRobert Love 7442e9a92fSRobert Love enum fc_lport_state { 7542e9a92fSRobert Love LPORT_ST_NONE = 0, 7642e9a92fSRobert Love LPORT_ST_FLOGI, 7742e9a92fSRobert Love LPORT_ST_DNS, 7842e9a92fSRobert Love LPORT_ST_RPN_ID, 7942e9a92fSRobert Love LPORT_ST_RFT_ID, 8042e9a92fSRobert Love LPORT_ST_SCR, 8142e9a92fSRobert Love LPORT_ST_READY, 8242e9a92fSRobert Love LPORT_ST_LOGO, 8342e9a92fSRobert Love LPORT_ST_RESET 8442e9a92fSRobert Love }; 8542e9a92fSRobert Love 8642e9a92fSRobert Love enum fc_disc_event { 8742e9a92fSRobert Love DISC_EV_NONE = 0, 8842e9a92fSRobert Love DISC_EV_SUCCESS, 8942e9a92fSRobert Love DISC_EV_FAILED 9042e9a92fSRobert Love }; 9142e9a92fSRobert Love 9242e9a92fSRobert Love enum fc_rport_state { 9342e9a92fSRobert Love RPORT_ST_NONE = 0, 9442e9a92fSRobert Love RPORT_ST_INIT, /* initialized */ 9542e9a92fSRobert Love RPORT_ST_PLOGI, /* waiting for PLOGI completion */ 9642e9a92fSRobert Love RPORT_ST_PRLI, /* waiting for PRLI completion */ 9742e9a92fSRobert Love RPORT_ST_RTV, /* waiting for RTV completion */ 9842e9a92fSRobert Love RPORT_ST_READY, /* ready for use */ 9942e9a92fSRobert Love RPORT_ST_LOGO, /* port logout sent */ 10042e9a92fSRobert Love }; 10142e9a92fSRobert Love 10242e9a92fSRobert Love enum fc_rport_trans_state { 10342e9a92fSRobert Love FC_PORTSTATE_ROGUE, 10442e9a92fSRobert Love FC_PORTSTATE_REAL, 10542e9a92fSRobert Love }; 10642e9a92fSRobert Love 10742e9a92fSRobert Love /** 10842e9a92fSRobert Love * struct fc_disc_port - temporary discovery port to hold rport identifiers 10942e9a92fSRobert Love * @lp: Fibre Channel host port instance 11042e9a92fSRobert Love * @peers: node for list management during discovery and RSCN processing 11142e9a92fSRobert Love * @ids: identifiers structure to pass to fc_remote_port_add() 11242e9a92fSRobert Love * @rport_work: work struct for starting the rport state machine 11342e9a92fSRobert Love */ 11442e9a92fSRobert Love struct fc_disc_port { 11542e9a92fSRobert Love struct fc_lport *lp; 11642e9a92fSRobert Love struct list_head peers; 11742e9a92fSRobert Love struct fc_rport_identifiers ids; 11842e9a92fSRobert Love struct work_struct rport_work; 11942e9a92fSRobert Love }; 12042e9a92fSRobert Love 12142e9a92fSRobert Love enum fc_rport_event { 12242e9a92fSRobert Love RPORT_EV_NONE = 0, 12342e9a92fSRobert Love RPORT_EV_CREATED, 12442e9a92fSRobert Love RPORT_EV_FAILED, 12542e9a92fSRobert Love RPORT_EV_STOP, 12642e9a92fSRobert Love RPORT_EV_LOGO 12742e9a92fSRobert Love }; 12842e9a92fSRobert Love 12942e9a92fSRobert Love struct fc_rport_operations { 13042e9a92fSRobert Love void (*event_callback)(struct fc_lport *, struct fc_rport *, 13142e9a92fSRobert Love enum fc_rport_event); 13242e9a92fSRobert Love }; 13342e9a92fSRobert Love 13442e9a92fSRobert Love /** 13542e9a92fSRobert Love * struct fc_rport_libfc_priv - libfc internal information about a remote port 13642e9a92fSRobert Love * @local_port: Fibre Channel host port instance 13742e9a92fSRobert Love * @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges 13842e9a92fSRobert Love * @flags: REC and RETRY supported flags 13942e9a92fSRobert Love * @max_seq: maximum number of concurrent sequences 14042e9a92fSRobert Love * @retries: retry count in current state 14142e9a92fSRobert Love * @e_d_tov: error detect timeout value (in msec) 14242e9a92fSRobert Love * @r_a_tov: resource allocation timeout value (in msec) 14342e9a92fSRobert Love * @rp_mutex: mutex protects rport 14442e9a92fSRobert Love * @retry_work: 14542e9a92fSRobert Love * @event_callback: Callback for rport READY, FAILED or LOGO 14642e9a92fSRobert Love */ 14742e9a92fSRobert Love struct fc_rport_libfc_priv { 14842e9a92fSRobert Love struct fc_lport *local_port; 14942e9a92fSRobert Love enum fc_rport_state rp_state; 15042e9a92fSRobert Love u16 flags; 15142e9a92fSRobert Love #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0) 15242e9a92fSRobert Love #define FC_RP_FLAGS_RETRY (1 << 1) 15342e9a92fSRobert Love u16 max_seq; 15442e9a92fSRobert Love unsigned int retries; 15542e9a92fSRobert Love unsigned int e_d_tov; 15642e9a92fSRobert Love unsigned int r_a_tov; 15742e9a92fSRobert Love enum fc_rport_trans_state trans_state; 15842e9a92fSRobert Love struct mutex rp_mutex; 15942e9a92fSRobert Love struct delayed_work retry_work; 16042e9a92fSRobert Love enum fc_rport_event event; 16142e9a92fSRobert Love struct fc_rport_operations *ops; 16242e9a92fSRobert Love struct list_head peers; 16342e9a92fSRobert Love struct work_struct event_work; 16442e9a92fSRobert Love }; 16542e9a92fSRobert Love 16642e9a92fSRobert Love #define PRIV_TO_RPORT(x) \ 16742e9a92fSRobert Love (struct fc_rport *)((void *)x - sizeof(struct fc_rport)); 16842e9a92fSRobert Love #define RPORT_TO_PRIV(x) \ 16942e9a92fSRobert Love (struct fc_rport_libfc_priv *)((void *)x + sizeof(struct fc_rport)); 17042e9a92fSRobert Love 17142e9a92fSRobert Love struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *); 17242e9a92fSRobert Love 17342e9a92fSRobert Love static inline void fc_rport_set_name(struct fc_rport *rport, u64 wwpn, u64 wwnn) 17442e9a92fSRobert Love { 17542e9a92fSRobert Love rport->node_name = wwnn; 17642e9a92fSRobert Love rport->port_name = wwpn; 17742e9a92fSRobert Love } 17842e9a92fSRobert Love 17942e9a92fSRobert Love /* 18042e9a92fSRobert Love * fcoe stats structure 18142e9a92fSRobert Love */ 18242e9a92fSRobert Love struct fcoe_dev_stats { 18342e9a92fSRobert Love u64 SecondsSinceLastReset; 18442e9a92fSRobert Love u64 TxFrames; 18542e9a92fSRobert Love u64 TxWords; 18642e9a92fSRobert Love u64 RxFrames; 18742e9a92fSRobert Love u64 RxWords; 18842e9a92fSRobert Love u64 ErrorFrames; 18942e9a92fSRobert Love u64 DumpedFrames; 19042e9a92fSRobert Love u64 LinkFailureCount; 19142e9a92fSRobert Love u64 LossOfSignalCount; 19242e9a92fSRobert Love u64 InvalidTxWordCount; 19342e9a92fSRobert Love u64 InvalidCRCCount; 19442e9a92fSRobert Love u64 InputRequests; 19542e9a92fSRobert Love u64 OutputRequests; 19642e9a92fSRobert Love u64 ControlRequests; 19742e9a92fSRobert Love u64 InputMegabytes; 19842e9a92fSRobert Love u64 OutputMegabytes; 19942e9a92fSRobert Love }; 20042e9a92fSRobert Love 20142e9a92fSRobert Love /* 20242e9a92fSRobert Love * els data is used for passing ELS respone specific 20342e9a92fSRobert Love * data to send ELS response mainly using infomation 20442e9a92fSRobert Love * in exchange and sequence in EM layer. 20542e9a92fSRobert Love */ 20642e9a92fSRobert Love struct fc_seq_els_data { 20742e9a92fSRobert Love struct fc_frame *fp; 20842e9a92fSRobert Love enum fc_els_rjt_reason reason; 20942e9a92fSRobert Love enum fc_els_rjt_explan explan; 21042e9a92fSRobert Love }; 21142e9a92fSRobert Love 21242e9a92fSRobert Love /* 21342e9a92fSRobert Love * FCP request structure, one for each scsi cmd request 21442e9a92fSRobert Love */ 21542e9a92fSRobert Love struct fc_fcp_pkt { 21642e9a92fSRobert Love /* 21742e9a92fSRobert Love * housekeeping stuff 21842e9a92fSRobert Love */ 21942e9a92fSRobert Love struct fc_lport *lp; /* handle to hba struct */ 22042e9a92fSRobert Love u16 state; /* scsi_pkt state state */ 22142e9a92fSRobert Love u16 tgt_flags; /* target flags */ 22242e9a92fSRobert Love atomic_t ref_cnt; /* fcp pkt ref count */ 22342e9a92fSRobert Love spinlock_t scsi_pkt_lock; /* Must be taken before the host lock 22442e9a92fSRobert Love * if both are held at the same time */ 22542e9a92fSRobert Love /* 22642e9a92fSRobert Love * SCSI I/O related stuff 22742e9a92fSRobert Love */ 22842e9a92fSRobert Love struct scsi_cmnd *cmd; /* scsi command pointer. set/clear 22942e9a92fSRobert Love * under host lock */ 23042e9a92fSRobert Love struct list_head list; /* tracks queued commands. access under 23142e9a92fSRobert Love * host lock */ 23242e9a92fSRobert Love /* 23342e9a92fSRobert Love * timeout related stuff 23442e9a92fSRobert Love */ 23542e9a92fSRobert Love struct timer_list timer; /* command timer */ 23642e9a92fSRobert Love struct completion tm_done; 23742e9a92fSRobert Love int wait_for_comp; 23842e9a92fSRobert Love unsigned long start_time; /* start jiffie */ 23942e9a92fSRobert Love unsigned long end_time; /* end jiffie */ 24042e9a92fSRobert Love unsigned long last_pkt_time; /* jiffies of last frame received */ 24142e9a92fSRobert Love 24242e9a92fSRobert Love /* 24342e9a92fSRobert Love * scsi cmd and data transfer information 24442e9a92fSRobert Love */ 24542e9a92fSRobert Love u32 data_len; 24642e9a92fSRobert Love /* 24742e9a92fSRobert Love * transport related veriables 24842e9a92fSRobert Love */ 24942e9a92fSRobert Love struct fcp_cmnd cdb_cmd; 25042e9a92fSRobert Love size_t xfer_len; 25142e9a92fSRobert Love u32 xfer_contig_end; /* offset of end of contiguous xfer */ 25242e9a92fSRobert Love u16 max_payload; /* max payload size in bytes */ 25342e9a92fSRobert Love 25442e9a92fSRobert Love /* 25542e9a92fSRobert Love * scsi/fcp return status 25642e9a92fSRobert Love */ 25742e9a92fSRobert Love u32 io_status; /* SCSI result upper 24 bits */ 25842e9a92fSRobert Love u8 cdb_status; 25942e9a92fSRobert Love u8 status_code; /* FCP I/O status */ 26042e9a92fSRobert Love /* bit 3 Underrun bit 2: overrun */ 26142e9a92fSRobert Love u8 scsi_comp_flags; 26242e9a92fSRobert Love u32 req_flags; /* bit 0: read bit:1 write */ 26342e9a92fSRobert Love u32 scsi_resid; /* residule length */ 26442e9a92fSRobert Love 26542e9a92fSRobert Love struct fc_rport *rport; /* remote port pointer */ 26642e9a92fSRobert Love struct fc_seq *seq_ptr; /* current sequence pointer */ 26742e9a92fSRobert Love /* 26842e9a92fSRobert Love * Error Processing 26942e9a92fSRobert Love */ 27042e9a92fSRobert Love u8 recov_retry; /* count of recovery retries */ 27142e9a92fSRobert Love struct fc_seq *recov_seq; /* sequence for REC or SRR */ 27242e9a92fSRobert Love }; 27342e9a92fSRobert Love 27442e9a92fSRobert Love /* 27542e9a92fSRobert Love * Structure and function definitions for managing Fibre Channel Exchanges 27642e9a92fSRobert Love * and Sequences 27742e9a92fSRobert Love * 27842e9a92fSRobert Love * fc_exch holds state for one exchange and links to its active sequence. 27942e9a92fSRobert Love * 28042e9a92fSRobert Love * fc_seq holds the state for an individual sequence. 28142e9a92fSRobert Love */ 28242e9a92fSRobert Love 28342e9a92fSRobert Love struct fc_exch_mgr; 28442e9a92fSRobert Love 28542e9a92fSRobert Love /* 28642e9a92fSRobert Love * Sequence. 28742e9a92fSRobert Love */ 28842e9a92fSRobert Love struct fc_seq { 28942e9a92fSRobert Love u8 id; /* seq ID */ 29042e9a92fSRobert Love u16 ssb_stat; /* status flags for sequence status block */ 29142e9a92fSRobert Love u16 cnt; /* frames sent so far on sequence */ 29242e9a92fSRobert Love u32 rec_data; /* FC-4 value for REC */ 29342e9a92fSRobert Love }; 29442e9a92fSRobert Love 29542e9a92fSRobert Love #define FC_EX_DONE (1 << 0) /* ep is completed */ 29642e9a92fSRobert Love #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ 29742e9a92fSRobert Love 29842e9a92fSRobert Love /* 29942e9a92fSRobert Love * Exchange. 30042e9a92fSRobert Love * 30142e9a92fSRobert Love * Locking notes: The ex_lock protects following items: 30242e9a92fSRobert Love * state, esb_stat, f_ctl, seq.ssb_stat 30342e9a92fSRobert Love * seq_id 30442e9a92fSRobert Love * sequence allocation 30542e9a92fSRobert Love */ 30642e9a92fSRobert Love struct fc_exch { 30742e9a92fSRobert Love struct fc_exch_mgr *em; /* exchange manager */ 30842e9a92fSRobert Love u32 state; /* internal driver state */ 30942e9a92fSRobert Love u16 xid; /* our exchange ID */ 31042e9a92fSRobert Love struct list_head ex_list; /* free or busy list linkage */ 31142e9a92fSRobert Love spinlock_t ex_lock; /* lock covering exchange state */ 31242e9a92fSRobert Love atomic_t ex_refcnt; /* reference counter */ 31342e9a92fSRobert Love struct delayed_work timeout_work; /* timer for upper level protocols */ 31442e9a92fSRobert Love struct fc_lport *lp; /* fc device instance */ 31542e9a92fSRobert Love u16 oxid; /* originator's exchange ID */ 31642e9a92fSRobert Love u16 rxid; /* responder's exchange ID */ 31742e9a92fSRobert Love u32 oid; /* originator's FCID */ 31842e9a92fSRobert Love u32 sid; /* source FCID */ 31942e9a92fSRobert Love u32 did; /* destination FCID */ 32042e9a92fSRobert Love u32 esb_stat; /* exchange status for ESB */ 32142e9a92fSRobert Love u32 r_a_tov; /* r_a_tov from rport (msec) */ 32242e9a92fSRobert Love u8 seq_id; /* next sequence ID to use */ 32342e9a92fSRobert Love u32 f_ctl; /* F_CTL flags for sequences */ 32442e9a92fSRobert Love u8 fh_type; /* frame type */ 32542e9a92fSRobert Love enum fc_class class; /* class of service */ 32642e9a92fSRobert Love struct fc_seq seq; /* single sequence */ 32742e9a92fSRobert Love /* 32842e9a92fSRobert Love * Handler for responses to this current exchange. 32942e9a92fSRobert Love */ 33042e9a92fSRobert Love void (*resp)(struct fc_seq *, struct fc_frame *, void *); 33142e9a92fSRobert Love void (*destructor)(struct fc_seq *, void *); 33242e9a92fSRobert Love /* 33342e9a92fSRobert Love * arg is passed as void pointer to exchange 33442e9a92fSRobert Love * resp and destructor handlers 33542e9a92fSRobert Love */ 33642e9a92fSRobert Love void *arg; 33742e9a92fSRobert Love }; 33842e9a92fSRobert Love #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) 33942e9a92fSRobert Love 34042e9a92fSRobert Love struct libfc_function_template { 34142e9a92fSRobert Love 34242e9a92fSRobert Love /** 34342e9a92fSRobert Love * Mandatory Fields 34442e9a92fSRobert Love * 34542e9a92fSRobert Love * These handlers must be implemented by the LLD. 34642e9a92fSRobert Love */ 34742e9a92fSRobert Love 34842e9a92fSRobert Love /* 34942e9a92fSRobert Love * Interface to send a FC frame 35042e9a92fSRobert Love */ 35142e9a92fSRobert Love int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp); 35242e9a92fSRobert Love 35342e9a92fSRobert Love /** 35442e9a92fSRobert Love * Optional Fields 35542e9a92fSRobert Love * 35642e9a92fSRobert Love * The LLD may choose to implement any of the following handlers. 35742e9a92fSRobert Love * If LLD doesn't specify hander and leaves its pointer NULL then 35842e9a92fSRobert Love * the default libfc function will be used for that handler. 35942e9a92fSRobert Love */ 36042e9a92fSRobert Love 36142e9a92fSRobert Love /** 36242e9a92fSRobert Love * ELS/CT interfaces 36342e9a92fSRobert Love */ 36442e9a92fSRobert Love 36542e9a92fSRobert Love /* 36642e9a92fSRobert Love * elsct_send - sends ELS/CT frame 36742e9a92fSRobert Love */ 36842e9a92fSRobert Love struct fc_seq *(*elsct_send)(struct fc_lport *lport, 36942e9a92fSRobert Love struct fc_rport *rport, 37042e9a92fSRobert Love struct fc_frame *fp, 37142e9a92fSRobert Love unsigned int op, 37242e9a92fSRobert Love void (*resp)(struct fc_seq *, 37342e9a92fSRobert Love struct fc_frame *fp, 37442e9a92fSRobert Love void *arg), 37542e9a92fSRobert Love void *arg, u32 timer_msec); 37642e9a92fSRobert Love /** 37742e9a92fSRobert Love * Exhance Manager interfaces 37842e9a92fSRobert Love */ 37942e9a92fSRobert Love 38042e9a92fSRobert Love /* 38142e9a92fSRobert Love * Send the FC frame payload using a new exchange and sequence. 38242e9a92fSRobert Love * 38342e9a92fSRobert Love * The frame pointer with some of the header's fields must be 38442e9a92fSRobert Love * filled before calling exch_seq_send(), those fields are, 38542e9a92fSRobert Love * 38642e9a92fSRobert Love * - routing control 38742e9a92fSRobert Love * - FC port did 38842e9a92fSRobert Love * - FC port sid 38942e9a92fSRobert Love * - FC header type 39042e9a92fSRobert Love * - frame control 39142e9a92fSRobert Love * - parameter or relative offset 39242e9a92fSRobert Love * 39342e9a92fSRobert Love * The exchange response handler is set in this routine to resp() 39442e9a92fSRobert Love * function pointer. It can be called in two scenarios: if a timeout 39542e9a92fSRobert Love * occurs or if a response frame is received for the exchange. The 39642e9a92fSRobert Love * fc_frame pointer in response handler will also indicate timeout 39742e9a92fSRobert Love * as error using IS_ERR related macros. 39842e9a92fSRobert Love * 39942e9a92fSRobert Love * The exchange destructor handler is also set in this routine. 40042e9a92fSRobert Love * The destructor handler is invoked by EM layer when exchange 40142e9a92fSRobert Love * is about to free, this can be used by caller to free its 40242e9a92fSRobert Love * resources along with exchange free. 40342e9a92fSRobert Love * 40442e9a92fSRobert Love * The arg is passed back to resp and destructor handler. 40542e9a92fSRobert Love * 40642e9a92fSRobert Love * The timeout value (in msec) for an exchange is set if non zero 40742e9a92fSRobert Love * timer_msec argument is specified. The timer is canceled when 40842e9a92fSRobert Love * it fires or when the exchange is done. The exchange timeout handler 40942e9a92fSRobert Love * is registered by EM layer. 41042e9a92fSRobert Love */ 41142e9a92fSRobert Love struct fc_seq *(*exch_seq_send)(struct fc_lport *lp, 41242e9a92fSRobert Love struct fc_frame *fp, 41342e9a92fSRobert Love void (*resp)(struct fc_seq *sp, 41442e9a92fSRobert Love struct fc_frame *fp, 41542e9a92fSRobert Love void *arg), 41642e9a92fSRobert Love void (*destructor)(struct fc_seq *sp, 41742e9a92fSRobert Love void *arg), 41842e9a92fSRobert Love void *arg, unsigned int timer_msec); 41942e9a92fSRobert Love 42042e9a92fSRobert Love /* 42142e9a92fSRobert Love * send a frame using existing sequence and exchange. 42242e9a92fSRobert Love */ 42342e9a92fSRobert Love int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp, 42442e9a92fSRobert Love struct fc_frame *fp); 42542e9a92fSRobert Love 42642e9a92fSRobert Love /* 42742e9a92fSRobert Love * Send ELS response using mainly infomation 42842e9a92fSRobert Love * in exchange and sequence in EM layer. 42942e9a92fSRobert Love */ 43042e9a92fSRobert Love void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd, 43142e9a92fSRobert Love struct fc_seq_els_data *els_data); 43242e9a92fSRobert Love 43342e9a92fSRobert Love /* 43442e9a92fSRobert Love * Abort an exchange and sequence. Generally called because of a 43542e9a92fSRobert Love * exchange timeout or an abort from the upper layer. 43642e9a92fSRobert Love * 43742e9a92fSRobert Love * A timer_msec can be specified for abort timeout, if non-zero 43842e9a92fSRobert Love * timer_msec value is specified then exchange resp handler 43942e9a92fSRobert Love * will be called with timeout error if no response to abort. 44042e9a92fSRobert Love */ 44142e9a92fSRobert Love int (*seq_exch_abort)(const struct fc_seq *req_sp, 44242e9a92fSRobert Love unsigned int timer_msec); 44342e9a92fSRobert Love 44442e9a92fSRobert Love /* 44542e9a92fSRobert Love * Indicate that an exchange/sequence tuple is complete and the memory 44642e9a92fSRobert Love * allocated for the related objects may be freed. 44742e9a92fSRobert Love */ 44842e9a92fSRobert Love void (*exch_done)(struct fc_seq *sp); 44942e9a92fSRobert Love 45042e9a92fSRobert Love /* 45142e9a92fSRobert Love * Assigns a EM and a free XID for an new exchange and then 45242e9a92fSRobert Love * allocates a new exchange and sequence pair. 45342e9a92fSRobert Love * The fp can be used to determine free XID. 45442e9a92fSRobert Love */ 45542e9a92fSRobert Love struct fc_exch *(*exch_get)(struct fc_lport *lp, struct fc_frame *fp); 45642e9a92fSRobert Love 45742e9a92fSRobert Love /* 45842e9a92fSRobert Love * Release previously assigned XID by exch_get API. 45942e9a92fSRobert Love * The LLD may implement this if XID is assigned by LLD 46042e9a92fSRobert Love * in exch_get(). 46142e9a92fSRobert Love */ 46242e9a92fSRobert Love void (*exch_put)(struct fc_lport *lp, struct fc_exch_mgr *mp, 46342e9a92fSRobert Love u16 ex_id); 46442e9a92fSRobert Love 46542e9a92fSRobert Love /* 46642e9a92fSRobert Love * Start a new sequence on the same exchange/sequence tuple. 46742e9a92fSRobert Love */ 46842e9a92fSRobert Love struct fc_seq *(*seq_start_next)(struct fc_seq *sp); 46942e9a92fSRobert Love 47042e9a92fSRobert Love /* 47142e9a92fSRobert Love * Reset an exchange manager, completing all sequences and exchanges. 47242e9a92fSRobert Love * If s_id is non-zero, reset only exchanges originating from that FID. 47342e9a92fSRobert Love * If d_id is non-zero, reset only exchanges sending to that FID. 47442e9a92fSRobert Love */ 47542e9a92fSRobert Love void (*exch_mgr_reset)(struct fc_exch_mgr *, 47642e9a92fSRobert Love u32 s_id, u32 d_id); 47742e9a92fSRobert Love 47842e9a92fSRobert Love void (*rport_flush_queue)(void); 47942e9a92fSRobert Love /** 48042e9a92fSRobert Love * Local Port interfaces 48142e9a92fSRobert Love */ 48242e9a92fSRobert Love 48342e9a92fSRobert Love /* 48442e9a92fSRobert Love * Receive a frame to a local port. 48542e9a92fSRobert Love */ 48642e9a92fSRobert Love void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp, 48742e9a92fSRobert Love struct fc_frame *fp); 48842e9a92fSRobert Love 48942e9a92fSRobert Love int (*lport_reset)(struct fc_lport *); 49042e9a92fSRobert Love 49142e9a92fSRobert Love /** 49242e9a92fSRobert Love * Remote Port interfaces 49342e9a92fSRobert Love */ 49442e9a92fSRobert Love 49542e9a92fSRobert Love /* 49642e9a92fSRobert Love * Initiates the RP state machine. It is called from the LP module. 49742e9a92fSRobert Love * This function will issue the following commands to the N_Port 49842e9a92fSRobert Love * identified by the FC ID provided. 49942e9a92fSRobert Love * 50042e9a92fSRobert Love * - PLOGI 50142e9a92fSRobert Love * - PRLI 50242e9a92fSRobert Love * - RTV 50342e9a92fSRobert Love */ 50442e9a92fSRobert Love int (*rport_login)(struct fc_rport *rport); 50542e9a92fSRobert Love 50642e9a92fSRobert Love /* 50742e9a92fSRobert Love * Logoff, and remove the rport from the transport if 50842e9a92fSRobert Love * it had been added. This will send a LOGO to the target. 50942e9a92fSRobert Love */ 51042e9a92fSRobert Love int (*rport_logoff)(struct fc_rport *rport); 51142e9a92fSRobert Love 51242e9a92fSRobert Love /* 51342e9a92fSRobert Love * Recieve a request from a remote port. 51442e9a92fSRobert Love */ 51542e9a92fSRobert Love void (*rport_recv_req)(struct fc_seq *, struct fc_frame *, 51642e9a92fSRobert Love struct fc_rport *); 51742e9a92fSRobert Love 51842e9a92fSRobert Love struct fc_rport *(*rport_lookup)(const struct fc_lport *, u32); 51942e9a92fSRobert Love 52042e9a92fSRobert Love /** 52142e9a92fSRobert Love * FCP interfaces 52242e9a92fSRobert Love */ 52342e9a92fSRobert Love 52442e9a92fSRobert Love /* 52542e9a92fSRobert Love * Send a fcp cmd from fsp pkt. 52642e9a92fSRobert Love * Called with the SCSI host lock unlocked and irqs disabled. 52742e9a92fSRobert Love * 52842e9a92fSRobert Love * The resp handler is called when FCP_RSP received. 52942e9a92fSRobert Love * 53042e9a92fSRobert Love */ 53142e9a92fSRobert Love int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp, 53242e9a92fSRobert Love void (*resp)(struct fc_seq *, struct fc_frame *fp, 53342e9a92fSRobert Love void *arg)); 53442e9a92fSRobert Love 53542e9a92fSRobert Love /* 53642e9a92fSRobert Love * Used at least durring linkdown and reset 53742e9a92fSRobert Love */ 53842e9a92fSRobert Love void (*fcp_cleanup)(struct fc_lport *lp); 53942e9a92fSRobert Love 54042e9a92fSRobert Love /* 54142e9a92fSRobert Love * Abort all I/O on a local port 54242e9a92fSRobert Love */ 54342e9a92fSRobert Love void (*fcp_abort_io)(struct fc_lport *lp); 54442e9a92fSRobert Love 54542e9a92fSRobert Love /** 54642e9a92fSRobert Love * Discovery interfaces 54742e9a92fSRobert Love */ 54842e9a92fSRobert Love 54942e9a92fSRobert Love void (*disc_recv_req)(struct fc_seq *, 55042e9a92fSRobert Love struct fc_frame *, struct fc_lport *); 55142e9a92fSRobert Love 55242e9a92fSRobert Love /* 55342e9a92fSRobert Love * Start discovery for a local port. 55442e9a92fSRobert Love */ 55542e9a92fSRobert Love void (*disc_start)(void (*disc_callback)(struct fc_lport *, 55642e9a92fSRobert Love enum fc_disc_event), 55742e9a92fSRobert Love struct fc_lport *); 55842e9a92fSRobert Love 55942e9a92fSRobert Love /* 56042e9a92fSRobert Love * Stop discovery for a given lport. This will remove 56142e9a92fSRobert Love * all discovered rports 56242e9a92fSRobert Love */ 56342e9a92fSRobert Love void (*disc_stop) (struct fc_lport *); 56442e9a92fSRobert Love 56542e9a92fSRobert Love /* 56642e9a92fSRobert Love * Stop discovery for a given lport. This will block 56742e9a92fSRobert Love * until all discovered rports are deleted from the 56842e9a92fSRobert Love * FC transport class 56942e9a92fSRobert Love */ 57042e9a92fSRobert Love void (*disc_stop_final) (struct fc_lport *); 57142e9a92fSRobert Love }; 57242e9a92fSRobert Love 57342e9a92fSRobert Love /* information used by the discovery layer */ 57442e9a92fSRobert Love struct fc_disc { 57542e9a92fSRobert Love unsigned char retry_count; 57642e9a92fSRobert Love unsigned char delay; 57742e9a92fSRobert Love unsigned char pending; 57842e9a92fSRobert Love unsigned char requested; 57942e9a92fSRobert Love unsigned short seq_count; 58042e9a92fSRobert Love unsigned char buf_len; 58142e9a92fSRobert Love enum fc_disc_event event; 58242e9a92fSRobert Love 58342e9a92fSRobert Love void (*disc_callback)(struct fc_lport *, 58442e9a92fSRobert Love enum fc_disc_event); 58542e9a92fSRobert Love 58642e9a92fSRobert Love struct list_head rports; 58742e9a92fSRobert Love struct fc_lport *lport; 58842e9a92fSRobert Love struct mutex disc_mutex; 58942e9a92fSRobert Love struct fc_gpn_ft_resp partial_buf; /* partial name buffer */ 59042e9a92fSRobert Love struct delayed_work disc_work; 59142e9a92fSRobert Love }; 59242e9a92fSRobert Love 59342e9a92fSRobert Love struct fc_lport { 59442e9a92fSRobert Love struct list_head list; 59542e9a92fSRobert Love 59642e9a92fSRobert Love /* Associations */ 59742e9a92fSRobert Love struct Scsi_Host *host; 59842e9a92fSRobert Love struct fc_exch_mgr *emp; 59942e9a92fSRobert Love struct fc_rport *dns_rp; 60042e9a92fSRobert Love struct fc_rport *ptp_rp; 60142e9a92fSRobert Love void *scsi_priv; 60242e9a92fSRobert Love struct fc_disc disc; 60342e9a92fSRobert Love 60442e9a92fSRobert Love /* Operational Information */ 60542e9a92fSRobert Love struct libfc_function_template tt; 60642e9a92fSRobert Love u16 link_status; 60742e9a92fSRobert Love enum fc_lport_state state; 60842e9a92fSRobert Love unsigned long boot_time; 60942e9a92fSRobert Love 61042e9a92fSRobert Love struct fc_host_statistics host_stats; 61142e9a92fSRobert Love struct fcoe_dev_stats *dev_stats[NR_CPUS]; 61242e9a92fSRobert Love u64 wwpn; 61342e9a92fSRobert Love u64 wwnn; 61442e9a92fSRobert Love u8 retry_count; 61542e9a92fSRobert Love 61642e9a92fSRobert Love /* Capabilities */ 61742e9a92fSRobert Love u32 sg_supp:1; /* scatter gather supported */ 61842e9a92fSRobert Love u32 seq_offload:1; /* seq offload supported */ 61942e9a92fSRobert Love u32 crc_offload:1; /* crc offload supported */ 62042e9a92fSRobert Love u32 lro_enabled:1; /* large receive offload */ 62142e9a92fSRobert Love u32 mfs; /* max FC payload size */ 62242e9a92fSRobert Love unsigned int service_params; 62342e9a92fSRobert Love unsigned int e_d_tov; 62442e9a92fSRobert Love unsigned int r_a_tov; 62542e9a92fSRobert Love u8 max_retry_count; 62642e9a92fSRobert Love u16 link_speed; 62742e9a92fSRobert Love u16 link_supported_speeds; 62842e9a92fSRobert Love u16 lro_xid; /* max xid for fcoe lro */ 62942e9a92fSRobert Love struct fc_ns_fts fcts; /* FC-4 type masks */ 63042e9a92fSRobert Love struct fc_els_rnid_gen rnid_gen; /* RNID information */ 63142e9a92fSRobert Love 63242e9a92fSRobert Love /* Semaphores */ 63342e9a92fSRobert Love struct mutex lp_mutex; 63442e9a92fSRobert Love 63542e9a92fSRobert Love /* Miscellaneous */ 63642e9a92fSRobert Love struct delayed_work retry_work; 63742e9a92fSRobert Love struct delayed_work disc_work; 63842e9a92fSRobert Love }; 63942e9a92fSRobert Love 64042e9a92fSRobert Love /** 64142e9a92fSRobert Love * FC_LPORT HELPER FUNCTIONS 64242e9a92fSRobert Love *****************************/ 64342e9a92fSRobert Love static inline void *lport_priv(const struct fc_lport *lp) 64442e9a92fSRobert Love { 64542e9a92fSRobert Love return (void *)(lp + 1); 64642e9a92fSRobert Love } 64742e9a92fSRobert Love 64842e9a92fSRobert Love static inline int fc_lport_test_ready(struct fc_lport *lp) 64942e9a92fSRobert Love { 65042e9a92fSRobert Love return lp->state == LPORT_ST_READY; 65142e9a92fSRobert Love } 65242e9a92fSRobert Love 65342e9a92fSRobert Love static inline void fc_set_wwnn(struct fc_lport *lp, u64 wwnn) 65442e9a92fSRobert Love { 65542e9a92fSRobert Love lp->wwnn = wwnn; 65642e9a92fSRobert Love } 65742e9a92fSRobert Love 65842e9a92fSRobert Love static inline void fc_set_wwpn(struct fc_lport *lp, u64 wwnn) 65942e9a92fSRobert Love { 66042e9a92fSRobert Love lp->wwpn = wwnn; 66142e9a92fSRobert Love } 66242e9a92fSRobert Love 66342e9a92fSRobert Love static inline void fc_lport_state_enter(struct fc_lport *lp, 66442e9a92fSRobert Love enum fc_lport_state state) 66542e9a92fSRobert Love { 66642e9a92fSRobert Love if (state != lp->state) 66742e9a92fSRobert Love lp->retry_count = 0; 66842e9a92fSRobert Love lp->state = state; 66942e9a92fSRobert Love } 67042e9a92fSRobert Love 67142e9a92fSRobert Love 67242e9a92fSRobert Love /** 67342e9a92fSRobert Love * LOCAL PORT LAYER 67442e9a92fSRobert Love *****************************/ 67542e9a92fSRobert Love int fc_lport_init(struct fc_lport *lp); 67642e9a92fSRobert Love 67742e9a92fSRobert Love /* 67842e9a92fSRobert Love * Destroy the specified local port by finding and freeing all 67942e9a92fSRobert Love * fc_rports associated with it and then by freeing the fc_lport 68042e9a92fSRobert Love * itself. 68142e9a92fSRobert Love */ 68242e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lp); 68342e9a92fSRobert Love 68442e9a92fSRobert Love /* 68542e9a92fSRobert Love * Logout the specified local port from the fabric 68642e9a92fSRobert Love */ 68742e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lp); 68842e9a92fSRobert Love 68942e9a92fSRobert Love /* 69042e9a92fSRobert Love * Initiate the LP state machine. This handler will use fc_host_attr 69142e9a92fSRobert Love * to store the FLOGI service parameters, so fc_host_attr must be 69242e9a92fSRobert Love * initialized before calling this handler. 69342e9a92fSRobert Love */ 69442e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lp); 69542e9a92fSRobert Love 69642e9a92fSRobert Love /* 69742e9a92fSRobert Love * The link is up for the given local port. 69842e9a92fSRobert Love */ 69942e9a92fSRobert Love void fc_linkup(struct fc_lport *); 70042e9a92fSRobert Love 70142e9a92fSRobert Love /* 70242e9a92fSRobert Love * Link is down for the given local port. 70342e9a92fSRobert Love */ 70442e9a92fSRobert Love void fc_linkdown(struct fc_lport *); 70542e9a92fSRobert Love 70642e9a92fSRobert Love /* 70742e9a92fSRobert Love * Pause and unpause traffic. 70842e9a92fSRobert Love */ 70942e9a92fSRobert Love void fc_pause(struct fc_lport *); 71042e9a92fSRobert Love void fc_unpause(struct fc_lport *); 71142e9a92fSRobert Love 71242e9a92fSRobert Love /* 71342e9a92fSRobert Love * Configure the local port. 71442e9a92fSRobert Love */ 71542e9a92fSRobert Love int fc_lport_config(struct fc_lport *); 71642e9a92fSRobert Love 71742e9a92fSRobert Love /* 71842e9a92fSRobert Love * Reset the local port. 71942e9a92fSRobert Love */ 72042e9a92fSRobert Love int fc_lport_reset(struct fc_lport *); 72142e9a92fSRobert Love 72242e9a92fSRobert Love /* 72342e9a92fSRobert Love * Set the mfs or reset 72442e9a92fSRobert Love */ 72542e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lp, u32 mfs); 72642e9a92fSRobert Love 72742e9a92fSRobert Love 72842e9a92fSRobert Love /** 72942e9a92fSRobert Love * REMOTE PORT LAYER 73042e9a92fSRobert Love *****************************/ 73142e9a92fSRobert Love int fc_rport_init(struct fc_lport *lp); 73242e9a92fSRobert Love void fc_rport_terminate_io(struct fc_rport *rp); 73342e9a92fSRobert Love 73442e9a92fSRobert Love /** 73542e9a92fSRobert Love * DISCOVERY LAYER 73642e9a92fSRobert Love *****************************/ 73742e9a92fSRobert Love int fc_disc_init(struct fc_lport *lp); 73842e9a92fSRobert Love 73942e9a92fSRobert Love 74042e9a92fSRobert Love /** 74142e9a92fSRobert Love * SCSI LAYER 74242e9a92fSRobert Love *****************************/ 74342e9a92fSRobert Love /* 74442e9a92fSRobert Love * Initialize the SCSI block of libfc 74542e9a92fSRobert Love */ 74642e9a92fSRobert Love int fc_fcp_init(struct fc_lport *); 74742e9a92fSRobert Love 74842e9a92fSRobert Love /* 74942e9a92fSRobert Love * This section provides an API which allows direct interaction 75042e9a92fSRobert Love * with the SCSI-ml. Each of these functions satisfies a function 75142e9a92fSRobert Love * pointer defined in Scsi_Host and therefore is always called 75242e9a92fSRobert Love * directly from the SCSI-ml. 75342e9a92fSRobert Love */ 75442e9a92fSRobert Love int fc_queuecommand(struct scsi_cmnd *sc_cmd, 75542e9a92fSRobert Love void (*done)(struct scsi_cmnd *)); 75642e9a92fSRobert Love 75742e9a92fSRobert Love /* 75842e9a92fSRobert Love * complete processing of a fcp packet 75942e9a92fSRobert Love * 76042e9a92fSRobert Love * This function may sleep if a fsp timer is pending. 76142e9a92fSRobert Love * The host lock must not be held by caller. 76242e9a92fSRobert Love */ 76342e9a92fSRobert Love void fc_fcp_complete(struct fc_fcp_pkt *fsp); 76442e9a92fSRobert Love 76542e9a92fSRobert Love /* 76642e9a92fSRobert Love * Send an ABTS frame to the target device. The sc_cmd argument 76742e9a92fSRobert Love * is a pointer to the SCSI command to be aborted. 76842e9a92fSRobert Love */ 76942e9a92fSRobert Love int fc_eh_abort(struct scsi_cmnd *sc_cmd); 77042e9a92fSRobert Love 77142e9a92fSRobert Love /* 77242e9a92fSRobert Love * Reset a LUN by sending send the tm cmd to the target. 77342e9a92fSRobert Love */ 77442e9a92fSRobert Love int fc_eh_device_reset(struct scsi_cmnd *sc_cmd); 77542e9a92fSRobert Love 77642e9a92fSRobert Love /* 77742e9a92fSRobert Love * Reset the host adapter. 77842e9a92fSRobert Love */ 77942e9a92fSRobert Love int fc_eh_host_reset(struct scsi_cmnd *sc_cmd); 78042e9a92fSRobert Love 78142e9a92fSRobert Love /* 78242e9a92fSRobert Love * Check rport status. 78342e9a92fSRobert Love */ 78442e9a92fSRobert Love int fc_slave_alloc(struct scsi_device *sdev); 78542e9a92fSRobert Love 78642e9a92fSRobert Love /* 78742e9a92fSRobert Love * Adjust the queue depth. 78842e9a92fSRobert Love */ 78942e9a92fSRobert Love int fc_change_queue_depth(struct scsi_device *sdev, int qdepth); 79042e9a92fSRobert Love 79142e9a92fSRobert Love /* 79242e9a92fSRobert Love * Change the tag type. 79342e9a92fSRobert Love */ 79442e9a92fSRobert Love int fc_change_queue_type(struct scsi_device *sdev, int tag_type); 79542e9a92fSRobert Love 79642e9a92fSRobert Love /* 79742e9a92fSRobert Love * Free memory pools used by the FCP layer. 79842e9a92fSRobert Love */ 79942e9a92fSRobert Love void fc_fcp_destroy(struct fc_lport *); 80042e9a92fSRobert Love 80142e9a92fSRobert Love /** 80242e9a92fSRobert Love * ELS/CT interface 80342e9a92fSRobert Love *****************************/ 80442e9a92fSRobert Love /* 80542e9a92fSRobert Love * Initializes ELS/CT interface 80642e9a92fSRobert Love */ 80742e9a92fSRobert Love int fc_elsct_init(struct fc_lport *lp); 80842e9a92fSRobert Love 80942e9a92fSRobert Love 81042e9a92fSRobert Love /** 81142e9a92fSRobert Love * EXCHANGE MANAGER LAYER 81242e9a92fSRobert Love *****************************/ 81342e9a92fSRobert Love /* 81442e9a92fSRobert Love * Initializes Exchange Manager related 81542e9a92fSRobert Love * function pointers in struct libfc_function_template. 81642e9a92fSRobert Love */ 81742e9a92fSRobert Love int fc_exch_init(struct fc_lport *lp); 81842e9a92fSRobert Love 81942e9a92fSRobert Love /* 82042e9a92fSRobert Love * Allocates an Exchange Manager (EM). 82142e9a92fSRobert Love * 82242e9a92fSRobert Love * The EM manages exchanges for their allocation and 82342e9a92fSRobert Love * free, also allows exchange lookup for received 82442e9a92fSRobert Love * frame. 82542e9a92fSRobert Love * 82642e9a92fSRobert Love * The class is used for initializing FC class of 82742e9a92fSRobert Love * allocated exchange from EM. 82842e9a92fSRobert Love * 82942e9a92fSRobert Love * The min_xid and max_xid will limit new 83042e9a92fSRobert Love * exchange ID (XID) within this range for 83142e9a92fSRobert Love * a new exchange. 83242e9a92fSRobert Love * The LLD may choose to have multiple EMs, 83342e9a92fSRobert Love * e.g. one EM instance per CPU receive thread in LLD. 83442e9a92fSRobert Love * The LLD can use exch_get() of struct libfc_function_template 83542e9a92fSRobert Love * to specify XID for a new exchange within 83642e9a92fSRobert Love * a specified EM instance. 83742e9a92fSRobert Love * 83842e9a92fSRobert Love * The em_idx to uniquely identify an EM instance. 83942e9a92fSRobert Love */ 84042e9a92fSRobert Love struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp, 84142e9a92fSRobert Love enum fc_class class, 84242e9a92fSRobert Love u16 min_xid, 84342e9a92fSRobert Love u16 max_xid); 84442e9a92fSRobert Love 84542e9a92fSRobert Love /* 84642e9a92fSRobert Love * Free an exchange manager. 84742e9a92fSRobert Love */ 84842e9a92fSRobert Love void fc_exch_mgr_free(struct fc_exch_mgr *mp); 84942e9a92fSRobert Love 85042e9a92fSRobert Love /* 85142e9a92fSRobert Love * Receive a frame on specified local port and exchange manager. 85242e9a92fSRobert Love */ 85342e9a92fSRobert Love void fc_exch_recv(struct fc_lport *lp, struct fc_exch_mgr *mp, 85442e9a92fSRobert Love struct fc_frame *fp); 85542e9a92fSRobert Love 85642e9a92fSRobert Love /* 85742e9a92fSRobert Love * This function is for exch_seq_send function pointer in 85842e9a92fSRobert Love * struct libfc_function_template, see comment block on 85942e9a92fSRobert Love * exch_seq_send for description of this function. 86042e9a92fSRobert Love */ 86142e9a92fSRobert Love struct fc_seq *fc_exch_seq_send(struct fc_lport *lp, 86242e9a92fSRobert Love struct fc_frame *fp, 86342e9a92fSRobert Love void (*resp)(struct fc_seq *sp, 86442e9a92fSRobert Love struct fc_frame *fp, 86542e9a92fSRobert Love void *arg), 86642e9a92fSRobert Love void (*destructor)(struct fc_seq *sp, 86742e9a92fSRobert Love void *arg), 86842e9a92fSRobert Love void *arg, u32 timer_msec); 86942e9a92fSRobert Love 87042e9a92fSRobert Love /* 87142e9a92fSRobert Love * send a frame using existing sequence and exchange. 87242e9a92fSRobert Love */ 87342e9a92fSRobert Love int fc_seq_send(struct fc_lport *lp, struct fc_seq *sp, struct fc_frame *fp); 87442e9a92fSRobert Love 87542e9a92fSRobert Love /* 87642e9a92fSRobert Love * Send ELS response using mainly infomation 87742e9a92fSRobert Love * in exchange and sequence in EM layer. 87842e9a92fSRobert Love */ 87942e9a92fSRobert Love void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd, 88042e9a92fSRobert Love struct fc_seq_els_data *els_data); 88142e9a92fSRobert Love 88242e9a92fSRobert Love /* 88342e9a92fSRobert Love * This function is for seq_exch_abort function pointer in 88442e9a92fSRobert Love * struct libfc_function_template, see comment block on 88542e9a92fSRobert Love * seq_exch_abort for description of this function. 88642e9a92fSRobert Love */ 88742e9a92fSRobert Love int fc_seq_exch_abort(const struct fc_seq *req_sp, unsigned int timer_msec); 88842e9a92fSRobert Love 88942e9a92fSRobert Love /* 89042e9a92fSRobert Love * Indicate that an exchange/sequence tuple is complete and the memory 89142e9a92fSRobert Love * allocated for the related objects may be freed. 89242e9a92fSRobert Love */ 89342e9a92fSRobert Love void fc_exch_done(struct fc_seq *sp); 89442e9a92fSRobert Love 89542e9a92fSRobert Love /* 89642e9a92fSRobert Love * Assigns a EM and XID for a frame and then allocates 89742e9a92fSRobert Love * a new exchange and sequence pair. 89842e9a92fSRobert Love * The fp can be used to determine free XID. 89942e9a92fSRobert Love */ 90042e9a92fSRobert Love struct fc_exch *fc_exch_get(struct fc_lport *lp, struct fc_frame *fp); 90142e9a92fSRobert Love 90242e9a92fSRobert Love /* 90342e9a92fSRobert Love * Allocate a new exchange and sequence pair. 90442e9a92fSRobert Love * if ex_id is zero then next free exchange id 90542e9a92fSRobert Love * from specified exchange manger mp will be assigned. 90642e9a92fSRobert Love */ 90742e9a92fSRobert Love struct fc_exch *fc_exch_alloc(struct fc_exch_mgr *mp, 90842e9a92fSRobert Love struct fc_frame *fp, u16 ex_id); 90942e9a92fSRobert Love /* 91042e9a92fSRobert Love * Start a new sequence on the same exchange as the supplied sequence. 91142e9a92fSRobert Love */ 91242e9a92fSRobert Love struct fc_seq *fc_seq_start_next(struct fc_seq *sp); 91342e9a92fSRobert Love 91442e9a92fSRobert Love /* 91542e9a92fSRobert Love * Reset an exchange manager, completing all sequences and exchanges. 91642e9a92fSRobert Love * If s_id is non-zero, reset only exchanges originating from that FID. 91742e9a92fSRobert Love * If d_id is non-zero, reset only exchanges sending to that FID. 91842e9a92fSRobert Love */ 91942e9a92fSRobert Love void fc_exch_mgr_reset(struct fc_exch_mgr *, u32 s_id, u32 d_id); 92042e9a92fSRobert Love 92142e9a92fSRobert Love /* 92242e9a92fSRobert Love * Functions for fc_functions_template 92342e9a92fSRobert Love */ 92442e9a92fSRobert Love void fc_get_host_speed(struct Scsi_Host *shost); 92542e9a92fSRobert Love void fc_get_host_port_type(struct Scsi_Host *shost); 92642e9a92fSRobert Love void fc_get_host_port_state(struct Scsi_Host *shost); 92742e9a92fSRobert Love void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout); 92842e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); 92942e9a92fSRobert Love 93042e9a92fSRobert Love /* 93142e9a92fSRobert Love * module setup functions. 93242e9a92fSRobert Love */ 93342e9a92fSRobert Love int fc_setup_exch_mgr(void); 93442e9a92fSRobert Love void fc_destroy_exch_mgr(void); 93542e9a92fSRobert Love int fc_setup_rport(void); 93642e9a92fSRobert Love void fc_destroy_rport(void); 93742e9a92fSRobert Love 93842e9a92fSRobert Love #endif /* _LIBFC_H_ */ 939