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> 25582b45bcSRobert Love #include <linux/percpu.h> 2642e9a92fSRobert Love 2742e9a92fSRobert Love #include <scsi/scsi_transport.h> 2842e9a92fSRobert Love #include <scsi/scsi_transport_fc.h> 2942e9a92fSRobert Love 3042e9a92fSRobert Love #include <scsi/fc/fc_fcp.h> 3142e9a92fSRobert Love #include <scsi/fc/fc_ns.h> 3242e9a92fSRobert Love #include <scsi/fc/fc_els.h> 3342e9a92fSRobert Love #include <scsi/fc/fc_gs.h> 3442e9a92fSRobert Love 3542e9a92fSRobert Love #include <scsi/fc_frame.h> 3642e9a92fSRobert Love 3742e9a92fSRobert Love /* 3842e9a92fSRobert Love * libfc error codes 3942e9a92fSRobert Love */ 4042e9a92fSRobert Love #define FC_NO_ERR 0 /* no error */ 4142e9a92fSRobert Love #define FC_EX_TIMEOUT 1 /* Exchange timeout */ 4242e9a92fSRobert Love #define FC_EX_CLOSED 2 /* Exchange closed */ 4342e9a92fSRobert Love 4442e9a92fSRobert Love /* some helpful macros */ 4542e9a92fSRobert Love 4642e9a92fSRobert Love #define ntohll(x) be64_to_cpu(x) 4742e9a92fSRobert Love #define htonll(x) cpu_to_be64(x) 4842e9a92fSRobert Love 4942e9a92fSRobert Love #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2])) 5042e9a92fSRobert Love 5142e9a92fSRobert Love #define hton24(p, v) do { \ 5242e9a92fSRobert Love p[0] = (((v) >> 16) & 0xFF); \ 5342e9a92fSRobert Love p[1] = (((v) >> 8) & 0xFF); \ 5442e9a92fSRobert Love p[2] = ((v) & 0xFF); \ 5542e9a92fSRobert Love } while (0) 5642e9a92fSRobert Love 5742e9a92fSRobert Love /* 5842e9a92fSRobert Love * FC HBA status 5942e9a92fSRobert Love */ 6042e9a92fSRobert Love enum fc_lport_state { 61b1d9fd55SJoe Eykholt LPORT_ST_DISABLED = 0, 6242e9a92fSRobert Love LPORT_ST_FLOGI, 6342e9a92fSRobert Love LPORT_ST_DNS, 64c9c7bd7aSChris Leech LPORT_ST_RNN_ID, 655baa17c3SChris Leech LPORT_ST_RSNN_NN, 66c9866a54SChris Leech LPORT_ST_RSPN_ID, 6742e9a92fSRobert Love LPORT_ST_RFT_ID, 6842e9a92fSRobert Love LPORT_ST_SCR, 6942e9a92fSRobert Love LPORT_ST_READY, 7042e9a92fSRobert Love LPORT_ST_LOGO, 7142e9a92fSRobert Love LPORT_ST_RESET 7242e9a92fSRobert Love }; 7342e9a92fSRobert Love 7442e9a92fSRobert Love enum fc_disc_event { 7542e9a92fSRobert Love DISC_EV_NONE = 0, 7642e9a92fSRobert Love DISC_EV_SUCCESS, 7742e9a92fSRobert Love DISC_EV_FAILED 7842e9a92fSRobert Love }; 7942e9a92fSRobert Love 8042e9a92fSRobert Love enum fc_rport_state { 8142e9a92fSRobert Love RPORT_ST_INIT, /* initialized */ 8242e9a92fSRobert Love RPORT_ST_PLOGI, /* waiting for PLOGI completion */ 8342e9a92fSRobert Love RPORT_ST_PRLI, /* waiting for PRLI completion */ 8442e9a92fSRobert Love RPORT_ST_RTV, /* waiting for RTV completion */ 8542e9a92fSRobert Love RPORT_ST_READY, /* ready for use */ 8642e9a92fSRobert Love RPORT_ST_LOGO, /* port logout sent */ 87370c3bd0SJoe Eykholt RPORT_ST_ADISC, /* Discover Address sent */ 8814194054SJoe Eykholt RPORT_ST_DELETE, /* port being deleted */ 89b4a9c7edSJoe Eykholt RPORT_ST_RESTART, /* remote port being deleted and will restart */ 9042e9a92fSRobert Love }; 9142e9a92fSRobert Love 9242e9a92fSRobert Love /** 9342e9a92fSRobert Love * struct fc_disc_port - temporary discovery port to hold rport identifiers 9442e9a92fSRobert Love * @lp: Fibre Channel host port instance 959737e6a7SRobert Love * @peers: Node for list management during discovery and RSCN processing 969737e6a7SRobert Love * @rport_work: Work struct for starting the rport state machine 979737e6a7SRobert Love * @port_id: Port ID of the discovered port 9842e9a92fSRobert Love */ 9942e9a92fSRobert Love struct fc_disc_port { 10042e9a92fSRobert Love struct fc_lport *lp; 10142e9a92fSRobert Love struct list_head peers; 10242e9a92fSRobert Love struct work_struct rport_work; 1039737e6a7SRobert Love u32 port_id; 10442e9a92fSRobert Love }; 10542e9a92fSRobert Love 10642e9a92fSRobert Love enum fc_rport_event { 10742e9a92fSRobert Love RPORT_EV_NONE = 0, 1084c0f62b5SJoe Eykholt RPORT_EV_READY, 10942e9a92fSRobert Love RPORT_EV_FAILED, 11042e9a92fSRobert Love RPORT_EV_STOP, 11142e9a92fSRobert Love RPORT_EV_LOGO 11242e9a92fSRobert Love }; 11342e9a92fSRobert Love 1149fb9d328SJoe Eykholt struct fc_rport_priv; 1159fb9d328SJoe Eykholt 11642e9a92fSRobert Love struct fc_rport_operations { 1179fb9d328SJoe Eykholt void (*event_callback)(struct fc_lport *, struct fc_rport_priv *, 11842e9a92fSRobert Love enum fc_rport_event); 11942e9a92fSRobert Love }; 12042e9a92fSRobert Love 12142e9a92fSRobert Love /** 12242e9a92fSRobert Love * struct fc_rport_libfc_priv - libfc internal information about a remote port 12342e9a92fSRobert Love * @local_port: Fibre Channel host port instance 1249e9d0452SJoe Eykholt * @rp_state: indicates READY for I/O or DELETE when blocked. 1259e9d0452SJoe Eykholt * @flags: REC and RETRY supported flags 1269e9d0452SJoe Eykholt * @e_d_tov: error detect timeout value (in msec) 1279e9d0452SJoe Eykholt * @r_a_tov: resource allocation timeout value (in msec) 1289e9d0452SJoe Eykholt */ 1299e9d0452SJoe Eykholt struct fc_rport_libfc_priv { 1309e9d0452SJoe Eykholt struct fc_lport *local_port; 1319e9d0452SJoe Eykholt enum fc_rport_state rp_state; 1329e9d0452SJoe Eykholt u16 flags; 1339e9d0452SJoe Eykholt #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0) 1349e9d0452SJoe Eykholt #define FC_RP_FLAGS_RETRY (1 << 1) 1359e9d0452SJoe Eykholt unsigned int e_d_tov; 1369e9d0452SJoe Eykholt unsigned int r_a_tov; 1379e9d0452SJoe Eykholt }; 1389e9d0452SJoe Eykholt 1399e9d0452SJoe Eykholt /** 1409e9d0452SJoe Eykholt * struct fc_rport_priv - libfc rport and discovery info about a remote port 1419e9d0452SJoe Eykholt * @local_port: Fibre Channel host port instance 142f211fa51SJoe Eykholt * @rport: transport remote port 143f211fa51SJoe Eykholt * @kref: reference counter 14442e9a92fSRobert Love * @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges 145f211fa51SJoe Eykholt * @ids: remote port identifiers and roles 14642e9a92fSRobert Love * @flags: REC and RETRY supported flags 14742e9a92fSRobert Love * @max_seq: maximum number of concurrent sequences 1480f6c6149SJoe Eykholt * @disc_id: discovery identifier 149f211fa51SJoe Eykholt * @maxframe_size: maximum frame size 15042e9a92fSRobert Love * @retries: retry count in current state 15142e9a92fSRobert Love * @e_d_tov: error detect timeout value (in msec) 15242e9a92fSRobert Love * @r_a_tov: resource allocation timeout value (in msec) 15342e9a92fSRobert Love * @rp_mutex: mutex protects rport 15442e9a92fSRobert Love * @retry_work: 15542e9a92fSRobert Love * @event_callback: Callback for rport READY, FAILED or LOGO 15642e9a92fSRobert Love */ 1579e9d0452SJoe Eykholt struct fc_rport_priv { 15842e9a92fSRobert Love struct fc_lport *local_port; 159f211fa51SJoe Eykholt struct fc_rport *rport; 160f211fa51SJoe Eykholt struct kref kref; 16142e9a92fSRobert Love enum fc_rport_state rp_state; 162f211fa51SJoe Eykholt struct fc_rport_identifiers ids; 16342e9a92fSRobert Love u16 flags; 16442e9a92fSRobert Love u16 max_seq; 1650f6c6149SJoe Eykholt u16 disc_id; 166f211fa51SJoe Eykholt u16 maxframe_size; 16742e9a92fSRobert Love unsigned int retries; 16842e9a92fSRobert Love unsigned int e_d_tov; 16942e9a92fSRobert Love unsigned int r_a_tov; 17042e9a92fSRobert Love struct mutex rp_mutex; 17142e9a92fSRobert Love struct delayed_work retry_work; 17242e9a92fSRobert Love enum fc_rport_event event; 17342e9a92fSRobert Love struct fc_rport_operations *ops; 17442e9a92fSRobert Love struct list_head peers; 17542e9a92fSRobert Love struct work_struct event_work; 176f211fa51SJoe Eykholt u32 supported_classes; 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; 251b277d2aaSYi Zou u16 xfer_ddp; /* this xfer is ddped */ 25242e9a92fSRobert Love u32 xfer_contig_end; /* offset of end of contiguous xfer */ 25342e9a92fSRobert Love u16 max_payload; /* max payload size in bytes */ 25442e9a92fSRobert Love 25542e9a92fSRobert Love /* 25642e9a92fSRobert Love * scsi/fcp return status 25742e9a92fSRobert Love */ 25842e9a92fSRobert Love u32 io_status; /* SCSI result upper 24 bits */ 25942e9a92fSRobert Love u8 cdb_status; 26042e9a92fSRobert Love u8 status_code; /* FCP I/O status */ 26142e9a92fSRobert Love /* bit 3 Underrun bit 2: overrun */ 26242e9a92fSRobert Love u8 scsi_comp_flags; 26342e9a92fSRobert Love u32 req_flags; /* bit 0: read bit:1 write */ 26442e9a92fSRobert Love u32 scsi_resid; /* residule length */ 26542e9a92fSRobert Love 26642e9a92fSRobert Love struct fc_rport *rport; /* remote port pointer */ 26742e9a92fSRobert Love struct fc_seq *seq_ptr; /* current sequence pointer */ 26842e9a92fSRobert Love /* 26942e9a92fSRobert Love * Error Processing 27042e9a92fSRobert Love */ 27142e9a92fSRobert Love u8 recov_retry; /* count of recovery retries */ 27242e9a92fSRobert Love struct fc_seq *recov_seq; /* sequence for REC or SRR */ 27342e9a92fSRobert Love }; 274b277d2aaSYi Zou /* 275b277d2aaSYi Zou * FC_FCP HELPER FUNCTIONS 276b277d2aaSYi Zou *****************************/ 277b277d2aaSYi Zou static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp) 278b277d2aaSYi Zou { 279b277d2aaSYi Zou if (fsp && fsp->cmd) 280b277d2aaSYi Zou return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE; 281b277d2aaSYi Zou return false; 282b277d2aaSYi Zou } 28342e9a92fSRobert Love 28442e9a92fSRobert Love /* 28542e9a92fSRobert Love * Structure and function definitions for managing Fibre Channel Exchanges 28642e9a92fSRobert Love * and Sequences 28742e9a92fSRobert Love * 28842e9a92fSRobert Love * fc_exch holds state for one exchange and links to its active sequence. 28942e9a92fSRobert Love * 29042e9a92fSRobert Love * fc_seq holds the state for an individual sequence. 29142e9a92fSRobert Love */ 29242e9a92fSRobert Love 29342e9a92fSRobert Love struct fc_exch_mgr; 29496316099SVasu Dev struct fc_exch_mgr_anchor; 295e4bc50beSVasu Dev extern u16 fc_cpu_mask; /* cpu mask for possible cpus */ 29642e9a92fSRobert Love 29742e9a92fSRobert Love /* 29842e9a92fSRobert Love * Sequence. 29942e9a92fSRobert Love */ 30042e9a92fSRobert Love struct fc_seq { 30142e9a92fSRobert Love u8 id; /* seq ID */ 30242e9a92fSRobert Love u16 ssb_stat; /* status flags for sequence status block */ 30342e9a92fSRobert Love u16 cnt; /* frames sent so far on sequence */ 30442e9a92fSRobert Love u32 rec_data; /* FC-4 value for REC */ 30542e9a92fSRobert Love }; 30642e9a92fSRobert Love 30742e9a92fSRobert Love #define FC_EX_DONE (1 << 0) /* ep is completed */ 30842e9a92fSRobert Love #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ 30942e9a92fSRobert Love 31042e9a92fSRobert Love /* 31142e9a92fSRobert Love * Exchange. 31242e9a92fSRobert Love * 31342e9a92fSRobert Love * Locking notes: The ex_lock protects following items: 31442e9a92fSRobert Love * state, esb_stat, f_ctl, seq.ssb_stat 31542e9a92fSRobert Love * seq_id 31642e9a92fSRobert Love * sequence allocation 31742e9a92fSRobert Love */ 31842e9a92fSRobert Love struct fc_exch { 31942e9a92fSRobert Love struct fc_exch_mgr *em; /* exchange manager */ 320b2f0091fSVasu Dev struct fc_exch_pool *pool; /* per cpu exches pool */ 32142e9a92fSRobert Love u32 state; /* internal driver state */ 32242e9a92fSRobert Love u16 xid; /* our exchange ID */ 32342e9a92fSRobert Love struct list_head ex_list; /* free or busy list linkage */ 32442e9a92fSRobert Love spinlock_t ex_lock; /* lock covering exchange state */ 32542e9a92fSRobert Love atomic_t ex_refcnt; /* reference counter */ 32642e9a92fSRobert Love struct delayed_work timeout_work; /* timer for upper level protocols */ 32742e9a92fSRobert Love struct fc_lport *lp; /* fc device instance */ 32842e9a92fSRobert Love u16 oxid; /* originator's exchange ID */ 32942e9a92fSRobert Love u16 rxid; /* responder's exchange ID */ 33042e9a92fSRobert Love u32 oid; /* originator's FCID */ 33142e9a92fSRobert Love u32 sid; /* source FCID */ 33242e9a92fSRobert Love u32 did; /* destination FCID */ 33342e9a92fSRobert Love u32 esb_stat; /* exchange status for ESB */ 33442e9a92fSRobert Love u32 r_a_tov; /* r_a_tov from rport (msec) */ 33542e9a92fSRobert Love u8 seq_id; /* next sequence ID to use */ 33642e9a92fSRobert Love u32 f_ctl; /* F_CTL flags for sequences */ 33742e9a92fSRobert Love u8 fh_type; /* frame type */ 33842e9a92fSRobert Love enum fc_class class; /* class of service */ 33942e9a92fSRobert Love struct fc_seq seq; /* single sequence */ 34042e9a92fSRobert Love /* 34142e9a92fSRobert Love * Handler for responses to this current exchange. 34242e9a92fSRobert Love */ 34342e9a92fSRobert Love void (*resp)(struct fc_seq *, struct fc_frame *, void *); 34442e9a92fSRobert Love void (*destructor)(struct fc_seq *, void *); 34542e9a92fSRobert Love /* 34642e9a92fSRobert Love * arg is passed as void pointer to exchange 34742e9a92fSRobert Love * resp and destructor handlers 34842e9a92fSRobert Love */ 34942e9a92fSRobert Love void *arg; 35042e9a92fSRobert Love }; 35142e9a92fSRobert Love #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) 35242e9a92fSRobert Love 35342e9a92fSRobert Love struct libfc_function_template { 35442e9a92fSRobert Love 35542e9a92fSRobert Love /* 35642e9a92fSRobert Love * Interface to send a FC frame 3570ae4d4aeSRobert Love * 3580ae4d4aeSRobert Love * STATUS: REQUIRED 35942e9a92fSRobert Love */ 36042e9a92fSRobert Love int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp); 36142e9a92fSRobert Love 36242e9a92fSRobert Love /* 3630ae4d4aeSRobert Love * Interface to send ELS/CT frames 3640ae4d4aeSRobert Love * 3650ae4d4aeSRobert Love * STATUS: OPTIONAL 36642e9a92fSRobert Love */ 36742e9a92fSRobert Love struct fc_seq *(*elsct_send)(struct fc_lport *lport, 368a46f327aSJoe Eykholt u32 did, 36942e9a92fSRobert Love struct fc_frame *fp, 37042e9a92fSRobert Love unsigned int op, 37142e9a92fSRobert Love void (*resp)(struct fc_seq *, 37242e9a92fSRobert Love struct fc_frame *fp, 37342e9a92fSRobert Love void *arg), 37442e9a92fSRobert Love void *arg, u32 timer_msec); 37542e9a92fSRobert Love 37642e9a92fSRobert Love /* 37742e9a92fSRobert Love * Send the FC frame payload using a new exchange and sequence. 37842e9a92fSRobert Love * 37942e9a92fSRobert Love * The frame pointer with some of the header's fields must be 38042e9a92fSRobert Love * filled before calling exch_seq_send(), those fields are, 38142e9a92fSRobert Love * 38242e9a92fSRobert Love * - routing control 38342e9a92fSRobert Love * - FC port did 38442e9a92fSRobert Love * - FC port sid 38542e9a92fSRobert Love * - FC header type 38642e9a92fSRobert Love * - frame control 38742e9a92fSRobert Love * - parameter or relative offset 38842e9a92fSRobert Love * 38942e9a92fSRobert Love * The exchange response handler is set in this routine to resp() 39042e9a92fSRobert Love * function pointer. It can be called in two scenarios: if a timeout 39142e9a92fSRobert Love * occurs or if a response frame is received for the exchange. The 39242e9a92fSRobert Love * fc_frame pointer in response handler will also indicate timeout 39342e9a92fSRobert Love * as error using IS_ERR related macros. 39442e9a92fSRobert Love * 39542e9a92fSRobert Love * The exchange destructor handler is also set in this routine. 39642e9a92fSRobert Love * The destructor handler is invoked by EM layer when exchange 39742e9a92fSRobert Love * is about to free, this can be used by caller to free its 39842e9a92fSRobert Love * resources along with exchange free. 39942e9a92fSRobert Love * 40042e9a92fSRobert Love * The arg is passed back to resp and destructor handler. 40142e9a92fSRobert Love * 40242e9a92fSRobert Love * The timeout value (in msec) for an exchange is set if non zero 40342e9a92fSRobert Love * timer_msec argument is specified. The timer is canceled when 40442e9a92fSRobert Love * it fires or when the exchange is done. The exchange timeout handler 40542e9a92fSRobert Love * is registered by EM layer. 4060ae4d4aeSRobert Love * 4070ae4d4aeSRobert Love * STATUS: OPTIONAL 40842e9a92fSRobert Love */ 40942e9a92fSRobert Love struct fc_seq *(*exch_seq_send)(struct fc_lport *lp, 41042e9a92fSRobert Love struct fc_frame *fp, 41142e9a92fSRobert Love void (*resp)(struct fc_seq *sp, 41242e9a92fSRobert Love struct fc_frame *fp, 41342e9a92fSRobert Love void *arg), 41442e9a92fSRobert Love void (*destructor)(struct fc_seq *sp, 41542e9a92fSRobert Love void *arg), 41642e9a92fSRobert Love void *arg, unsigned int timer_msec); 41742e9a92fSRobert Love 41842e9a92fSRobert Love /* 419b277d2aaSYi Zou * Sets up the DDP context for a given exchange id on the given 420b277d2aaSYi Zou * scatterlist if LLD supports DDP for large receive. 421b277d2aaSYi Zou * 422b277d2aaSYi Zou * STATUS: OPTIONAL 423b277d2aaSYi Zou */ 424b277d2aaSYi Zou int (*ddp_setup)(struct fc_lport *lp, u16 xid, 425b277d2aaSYi Zou struct scatterlist *sgl, unsigned int sgc); 426b277d2aaSYi Zou /* 427b277d2aaSYi Zou * Completes the DDP transfer and returns the length of data DDPed 428b277d2aaSYi Zou * for the given exchange id. 429b277d2aaSYi Zou * 430b277d2aaSYi Zou * STATUS: OPTIONAL 431b277d2aaSYi Zou */ 432b277d2aaSYi Zou int (*ddp_done)(struct fc_lport *lp, u16 xid); 433b277d2aaSYi Zou /* 4340ae4d4aeSRobert Love * Send a frame using an existing sequence and exchange. 4350ae4d4aeSRobert Love * 4360ae4d4aeSRobert Love * STATUS: OPTIONAL 43742e9a92fSRobert Love */ 43842e9a92fSRobert Love int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp, 43942e9a92fSRobert Love struct fc_frame *fp); 44042e9a92fSRobert Love 44142e9a92fSRobert Love /* 4420ae4d4aeSRobert Love * Send an ELS response using infomation from a previous 4430ae4d4aeSRobert Love * exchange and sequence. 4440ae4d4aeSRobert Love * 4450ae4d4aeSRobert Love * STATUS: OPTIONAL 44642e9a92fSRobert Love */ 44742e9a92fSRobert Love void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd, 44842e9a92fSRobert Love struct fc_seq_els_data *els_data); 44942e9a92fSRobert Love 45042e9a92fSRobert Love /* 45142e9a92fSRobert Love * Abort an exchange and sequence. Generally called because of a 45242e9a92fSRobert Love * exchange timeout or an abort from the upper layer. 45342e9a92fSRobert Love * 45442e9a92fSRobert Love * A timer_msec can be specified for abort timeout, if non-zero 45542e9a92fSRobert Love * timer_msec value is specified then exchange resp handler 45642e9a92fSRobert Love * will be called with timeout error if no response to abort. 4570ae4d4aeSRobert Love * 4580ae4d4aeSRobert Love * STATUS: OPTIONAL 45942e9a92fSRobert Love */ 46042e9a92fSRobert Love int (*seq_exch_abort)(const struct fc_seq *req_sp, 46142e9a92fSRobert Love unsigned int timer_msec); 46242e9a92fSRobert Love 46342e9a92fSRobert Love /* 46442e9a92fSRobert Love * Indicate that an exchange/sequence tuple is complete and the memory 46542e9a92fSRobert Love * allocated for the related objects may be freed. 4660ae4d4aeSRobert Love * 4670ae4d4aeSRobert Love * STATUS: OPTIONAL 46842e9a92fSRobert Love */ 46942e9a92fSRobert Love void (*exch_done)(struct fc_seq *sp); 47042e9a92fSRobert Love 47142e9a92fSRobert Love /* 47242e9a92fSRobert Love * Start a new sequence on the same exchange/sequence tuple. 4730ae4d4aeSRobert Love * 4740ae4d4aeSRobert Love * STATUS: OPTIONAL 47542e9a92fSRobert Love */ 47642e9a92fSRobert Love struct fc_seq *(*seq_start_next)(struct fc_seq *sp); 47742e9a92fSRobert Love 47842e9a92fSRobert Love /* 47942e9a92fSRobert Love * Reset an exchange manager, completing all sequences and exchanges. 48042e9a92fSRobert Love * If s_id is non-zero, reset only exchanges originating from that FID. 48142e9a92fSRobert Love * If d_id is non-zero, reset only exchanges sending to that FID. 4820ae4d4aeSRobert Love * 4830ae4d4aeSRobert Love * STATUS: OPTIONAL 48442e9a92fSRobert Love */ 4851f6ff364SAbhijeet Joglekar void (*exch_mgr_reset)(struct fc_lport *, 48642e9a92fSRobert Love u32 s_id, u32 d_id); 48742e9a92fSRobert Love 4880ae4d4aeSRobert Love /* 4890ae4d4aeSRobert Love * Flush the rport work queue. Generally used before shutdown. 4900ae4d4aeSRobert Love * 4910ae4d4aeSRobert Love * STATUS: OPTIONAL 49242e9a92fSRobert Love */ 4930ae4d4aeSRobert Love void (*rport_flush_queue)(void); 49442e9a92fSRobert Love 49542e9a92fSRobert Love /* 4960ae4d4aeSRobert Love * Receive a frame for a local port. 4970ae4d4aeSRobert Love * 4980ae4d4aeSRobert Love * STATUS: OPTIONAL 49942e9a92fSRobert Love */ 50042e9a92fSRobert Love void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp, 50142e9a92fSRobert Love struct fc_frame *fp); 50242e9a92fSRobert Love 5030ae4d4aeSRobert Love /* 5040ae4d4aeSRobert Love * Reset the local port. 5050ae4d4aeSRobert Love * 5060ae4d4aeSRobert Love * STATUS: OPTIONAL 50742e9a92fSRobert Love */ 5080ae4d4aeSRobert Love int (*lport_reset)(struct fc_lport *); 50942e9a92fSRobert Love 51042e9a92fSRobert Love /* 5119737e6a7SRobert Love * Create a remote port with a given port ID 5129737e6a7SRobert Love * 5139737e6a7SRobert Love * STATUS: OPTIONAL 5145101ff99SRobert Love */ 5159737e6a7SRobert Love struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32); 5165101ff99SRobert Love 5175101ff99SRobert Love /* 51842e9a92fSRobert Love * Initiates the RP state machine. It is called from the LP module. 51942e9a92fSRobert Love * This function will issue the following commands to the N_Port 52042e9a92fSRobert Love * identified by the FC ID provided. 52142e9a92fSRobert Love * 52242e9a92fSRobert Love * - PLOGI 52342e9a92fSRobert Love * - PRLI 52442e9a92fSRobert Love * - RTV 5250ae4d4aeSRobert Love * 5260ae4d4aeSRobert Love * STATUS: OPTIONAL 52742e9a92fSRobert Love */ 5289fb9d328SJoe Eykholt int (*rport_login)(struct fc_rport_priv *); 52942e9a92fSRobert Love 53042e9a92fSRobert Love /* 53142e9a92fSRobert Love * Logoff, and remove the rport from the transport if 53242e9a92fSRobert Love * it had been added. This will send a LOGO to the target. 5330ae4d4aeSRobert Love * 5340ae4d4aeSRobert Love * STATUS: OPTIONAL 53542e9a92fSRobert Love */ 5369fb9d328SJoe Eykholt int (*rport_logoff)(struct fc_rport_priv *); 53742e9a92fSRobert Love 53842e9a92fSRobert Love /* 53942e9a92fSRobert Love * Recieve a request from a remote port. 5400ae4d4aeSRobert Love * 5410ae4d4aeSRobert Love * STATUS: OPTIONAL 54242e9a92fSRobert Love */ 54342e9a92fSRobert Love void (*rport_recv_req)(struct fc_seq *, struct fc_frame *, 544131203a1SJoe Eykholt struct fc_lport *); 54542e9a92fSRobert Love 5460ae4d4aeSRobert Love /* 5470ae4d4aeSRobert Love * lookup an rport by it's port ID. 5480ae4d4aeSRobert Love * 5490ae4d4aeSRobert Love * STATUS: OPTIONAL 55042e9a92fSRobert Love */ 5519fb9d328SJoe Eykholt struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32); 55242e9a92fSRobert Love 55342e9a92fSRobert Love /* 554f211fa51SJoe Eykholt * Destroy an rport after final kref_put(). 555f211fa51SJoe Eykholt * The argument is a pointer to the kref inside the fc_rport_priv. 556f211fa51SJoe Eykholt */ 557f211fa51SJoe Eykholt void (*rport_destroy)(struct kref *); 558f211fa51SJoe Eykholt 559f211fa51SJoe Eykholt /* 56042e9a92fSRobert Love * Send a fcp cmd from fsp pkt. 56142e9a92fSRobert Love * Called with the SCSI host lock unlocked and irqs disabled. 56242e9a92fSRobert Love * 56342e9a92fSRobert Love * The resp handler is called when FCP_RSP received. 56442e9a92fSRobert Love * 5650ae4d4aeSRobert Love * STATUS: OPTIONAL 56642e9a92fSRobert Love */ 56742e9a92fSRobert Love int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp, 56842e9a92fSRobert Love void (*resp)(struct fc_seq *, struct fc_frame *fp, 56942e9a92fSRobert Love void *arg)); 57042e9a92fSRobert Love 57142e9a92fSRobert Love /* 5720ae4d4aeSRobert Love * Cleanup the FCP layer, used durring link down and reset 5730ae4d4aeSRobert Love * 5740ae4d4aeSRobert Love * STATUS: OPTIONAL 57542e9a92fSRobert Love */ 57642e9a92fSRobert Love void (*fcp_cleanup)(struct fc_lport *lp); 57742e9a92fSRobert Love 57842e9a92fSRobert Love /* 57942e9a92fSRobert Love * Abort all I/O on a local port 5800ae4d4aeSRobert Love * 5810ae4d4aeSRobert Love * STATUS: OPTIONAL 58242e9a92fSRobert Love */ 58342e9a92fSRobert Love void (*fcp_abort_io)(struct fc_lport *lp); 58442e9a92fSRobert Love 5850ae4d4aeSRobert Love /* 5860ae4d4aeSRobert Love * Receive a request for the discovery layer. 5870ae4d4aeSRobert Love * 5880ae4d4aeSRobert Love * STATUS: OPTIONAL 58942e9a92fSRobert Love */ 59042e9a92fSRobert Love void (*disc_recv_req)(struct fc_seq *, 59142e9a92fSRobert Love struct fc_frame *, struct fc_lport *); 59242e9a92fSRobert Love 59342e9a92fSRobert Love /* 59442e9a92fSRobert Love * Start discovery for a local port. 5950ae4d4aeSRobert Love * 5960ae4d4aeSRobert Love * STATUS: OPTIONAL 59742e9a92fSRobert Love */ 59842e9a92fSRobert Love void (*disc_start)(void (*disc_callback)(struct fc_lport *, 59942e9a92fSRobert Love enum fc_disc_event), 60042e9a92fSRobert Love struct fc_lport *); 60142e9a92fSRobert Love 60242e9a92fSRobert Love /* 60342e9a92fSRobert Love * Stop discovery for a given lport. This will remove 60442e9a92fSRobert Love * all discovered rports 6050ae4d4aeSRobert Love * 6060ae4d4aeSRobert Love * STATUS: OPTIONAL 60742e9a92fSRobert Love */ 60842e9a92fSRobert Love void (*disc_stop) (struct fc_lport *); 60942e9a92fSRobert Love 61042e9a92fSRobert Love /* 61142e9a92fSRobert Love * Stop discovery for a given lport. This will block 61242e9a92fSRobert Love * until all discovered rports are deleted from the 61342e9a92fSRobert Love * FC transport class 6140ae4d4aeSRobert Love * 6150ae4d4aeSRobert Love * STATUS: OPTIONAL 61642e9a92fSRobert Love */ 61742e9a92fSRobert Love void (*disc_stop_final) (struct fc_lport *); 61842e9a92fSRobert Love }; 61942e9a92fSRobert Love 62042e9a92fSRobert Love /* information used by the discovery layer */ 62142e9a92fSRobert Love struct fc_disc { 62242e9a92fSRobert Love unsigned char retry_count; 62342e9a92fSRobert Love unsigned char pending; 62442e9a92fSRobert Love unsigned char requested; 62542e9a92fSRobert Love unsigned short seq_count; 62642e9a92fSRobert Love unsigned char buf_len; 6270f6c6149SJoe Eykholt u16 disc_id; 62842e9a92fSRobert Love 62942e9a92fSRobert Love void (*disc_callback)(struct fc_lport *, 63042e9a92fSRobert Love enum fc_disc_event); 63142e9a92fSRobert Love 63242e9a92fSRobert Love struct list_head rports; 63342e9a92fSRobert Love struct fc_lport *lport; 63442e9a92fSRobert Love struct mutex disc_mutex; 63542e9a92fSRobert Love struct fc_gpn_ft_resp partial_buf; /* partial name buffer */ 63642e9a92fSRobert Love struct delayed_work disc_work; 63742e9a92fSRobert Love }; 63842e9a92fSRobert Love 63942e9a92fSRobert Love struct fc_lport { 64042e9a92fSRobert Love struct list_head list; 64142e9a92fSRobert Love 64242e9a92fSRobert Love /* Associations */ 64342e9a92fSRobert Love struct Scsi_Host *host; 64496316099SVasu Dev struct list_head ema_list; 645174e1ebfSChris Leech struct list_head vports; /* child vports if N_Port */ 646174e1ebfSChris Leech struct fc_vport *vport; /* parent vport if VN_Port */ 6479fb9d328SJoe Eykholt struct fc_rport_priv *dns_rp; 6489fb9d328SJoe Eykholt struct fc_rport_priv *ptp_rp; 64942e9a92fSRobert Love void *scsi_priv; 65042e9a92fSRobert Love struct fc_disc disc; 65142e9a92fSRobert Love 65242e9a92fSRobert Love /* Operational Information */ 65342e9a92fSRobert Love struct libfc_function_template tt; 654bc0e17f6SVasu Dev u8 link_up; 655bc0e17f6SVasu Dev u8 qfull; 65642e9a92fSRobert Love enum fc_lport_state state; 65742e9a92fSRobert Love unsigned long boot_time; 65842e9a92fSRobert Love 65942e9a92fSRobert Love struct fc_host_statistics host_stats; 660582b45bcSRobert Love struct fcoe_dev_stats *dev_stats; 661582b45bcSRobert Love 66242e9a92fSRobert Love u64 wwpn; 66342e9a92fSRobert Love u64 wwnn; 66442e9a92fSRobert Love u8 retry_count; 66542e9a92fSRobert Love 66642e9a92fSRobert Love /* Capabilities */ 66742e9a92fSRobert Love u32 sg_supp:1; /* scatter gather supported */ 66842e9a92fSRobert Love u32 seq_offload:1; /* seq offload supported */ 66942e9a92fSRobert Love u32 crc_offload:1; /* crc offload supported */ 67042e9a92fSRobert Love u32 lro_enabled:1; /* large receive offload */ 671174e1ebfSChris Leech u32 does_npiv:1; /* supports multiple vports */ 672174e1ebfSChris Leech u32 npiv_enabled:1; /* switch/fabric allows NPIV */ 67342e9a92fSRobert Love u32 mfs; /* max FC payload size */ 67442e9a92fSRobert Love unsigned int service_params; 67542e9a92fSRobert Love unsigned int e_d_tov; 67642e9a92fSRobert Love unsigned int r_a_tov; 67742e9a92fSRobert Love u8 max_retry_count; 678a3666955SAbhijeet Joglekar u8 max_rport_retry_count; 67942e9a92fSRobert Love u16 link_speed; 68042e9a92fSRobert Love u16 link_supported_speeds; 68142e9a92fSRobert Love u16 lro_xid; /* max xid for fcoe lro */ 682ea1e9a9dSYi Zou unsigned int lso_max; /* max large send size */ 68342e9a92fSRobert Love struct fc_ns_fts fcts; /* FC-4 type masks */ 68442e9a92fSRobert Love struct fc_els_rnid_gen rnid_gen; /* RNID information */ 68542e9a92fSRobert Love 68642e9a92fSRobert Love /* Semaphores */ 68742e9a92fSRobert Love struct mutex lp_mutex; 68842e9a92fSRobert Love 68942e9a92fSRobert Love /* Miscellaneous */ 69042e9a92fSRobert Love struct delayed_work retry_work; 69142e9a92fSRobert Love }; 69242e9a92fSRobert Love 69334f42a07SRobert Love /* 69442e9a92fSRobert Love * FC_LPORT HELPER FUNCTIONS 69542e9a92fSRobert Love *****************************/ 69642e9a92fSRobert Love static inline int fc_lport_test_ready(struct fc_lport *lp) 69742e9a92fSRobert Love { 69842e9a92fSRobert Love return lp->state == LPORT_ST_READY; 69942e9a92fSRobert Love } 70042e9a92fSRobert Love 70142e9a92fSRobert Love static inline void fc_set_wwnn(struct fc_lport *lp, u64 wwnn) 70242e9a92fSRobert Love { 70342e9a92fSRobert Love lp->wwnn = wwnn; 70442e9a92fSRobert Love } 70542e9a92fSRobert Love 70642e9a92fSRobert Love static inline void fc_set_wwpn(struct fc_lport *lp, u64 wwnn) 70742e9a92fSRobert Love { 70842e9a92fSRobert Love lp->wwpn = wwnn; 70942e9a92fSRobert Love } 71042e9a92fSRobert Love 71142e9a92fSRobert Love static inline void fc_lport_state_enter(struct fc_lport *lp, 71242e9a92fSRobert Love enum fc_lport_state state) 71342e9a92fSRobert Love { 71442e9a92fSRobert Love if (state != lp->state) 71542e9a92fSRobert Love lp->retry_count = 0; 71642e9a92fSRobert Love lp->state = state; 71742e9a92fSRobert Love } 71842e9a92fSRobert Love 719582b45bcSRobert Love static inline int fc_lport_init_stats(struct fc_lport *lp) 720582b45bcSRobert Love { 721582b45bcSRobert Love /* allocate per cpu stats block */ 722582b45bcSRobert Love lp->dev_stats = alloc_percpu(struct fcoe_dev_stats); 723582b45bcSRobert Love if (!lp->dev_stats) 724582b45bcSRobert Love return -ENOMEM; 725582b45bcSRobert Love return 0; 726582b45bcSRobert Love } 727582b45bcSRobert Love 728582b45bcSRobert Love static inline void fc_lport_free_stats(struct fc_lport *lp) 729582b45bcSRobert Love { 730582b45bcSRobert Love free_percpu(lp->dev_stats); 731582b45bcSRobert Love } 732582b45bcSRobert Love 733582b45bcSRobert Love static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lp) 734582b45bcSRobert Love { 735582b45bcSRobert Love return per_cpu_ptr(lp->dev_stats, smp_processor_id()); 736582b45bcSRobert Love } 737582b45bcSRobert Love 738a0a25da2SVasu Dev static inline void *lport_priv(const struct fc_lport *lp) 739a0a25da2SVasu Dev { 740a0a25da2SVasu Dev return (void *)(lp + 1); 741a0a25da2SVasu Dev } 742a0a25da2SVasu Dev 743a0a25da2SVasu Dev /** 744a0a25da2SVasu Dev * libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport 745a0a25da2SVasu Dev * @sht: ptr to the scsi host templ 746a0a25da2SVasu Dev * @priv_size: size of private data after fc_lport 747a0a25da2SVasu Dev * 74886221969SChris Leech * Returns: libfc lport 749a0a25da2SVasu Dev */ 75086221969SChris Leech static inline struct fc_lport * 751a0a25da2SVasu Dev libfc_host_alloc(struct scsi_host_template *sht, int priv_size) 752a0a25da2SVasu Dev { 75386221969SChris Leech struct fc_lport *lport; 75486221969SChris Leech struct Scsi_Host *shost; 75586221969SChris Leech 75686221969SChris Leech shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size); 75786221969SChris Leech if (!shost) 75886221969SChris Leech return NULL; 75986221969SChris Leech lport = shost_priv(shost); 76086221969SChris Leech lport->host = shost; 76186221969SChris Leech INIT_LIST_HEAD(&lport->ema_list); 762174e1ebfSChris Leech INIT_LIST_HEAD(&lport->vports); 76386221969SChris Leech return lport; 764a0a25da2SVasu Dev } 76542e9a92fSRobert Love 76634f42a07SRobert Love /* 76742e9a92fSRobert Love * LOCAL PORT LAYER 76842e9a92fSRobert Love *****************************/ 76942e9a92fSRobert Love int fc_lport_init(struct fc_lport *lp); 77042e9a92fSRobert Love 77142e9a92fSRobert Love /* 77242e9a92fSRobert Love * Destroy the specified local port by finding and freeing all 77342e9a92fSRobert Love * fc_rports associated with it and then by freeing the fc_lport 77442e9a92fSRobert Love * itself. 77542e9a92fSRobert Love */ 77642e9a92fSRobert Love int fc_lport_destroy(struct fc_lport *lp); 77742e9a92fSRobert Love 77842e9a92fSRobert Love /* 77942e9a92fSRobert Love * Logout the specified local port from the fabric 78042e9a92fSRobert Love */ 78142e9a92fSRobert Love int fc_fabric_logoff(struct fc_lport *lp); 78242e9a92fSRobert Love 78342e9a92fSRobert Love /* 78442e9a92fSRobert Love * Initiate the LP state machine. This handler will use fc_host_attr 78542e9a92fSRobert Love * to store the FLOGI service parameters, so fc_host_attr must be 78642e9a92fSRobert Love * initialized before calling this handler. 78742e9a92fSRobert Love */ 78842e9a92fSRobert Love int fc_fabric_login(struct fc_lport *lp); 78942e9a92fSRobert Love 79042e9a92fSRobert Love /* 79142e9a92fSRobert Love * The link is up for the given local port. 79242e9a92fSRobert Love */ 7938faecddbSChris Leech void __fc_linkup(struct fc_lport *); 79442e9a92fSRobert Love void fc_linkup(struct fc_lport *); 79542e9a92fSRobert Love 79642e9a92fSRobert Love /* 79742e9a92fSRobert Love * Link is down for the given local port. 79842e9a92fSRobert Love */ 7998faecddbSChris Leech void __fc_linkdown(struct fc_lport *); 80042e9a92fSRobert Love void fc_linkdown(struct fc_lport *); 80142e9a92fSRobert Love 80242e9a92fSRobert Love /* 80342e9a92fSRobert Love * Configure the local port. 80442e9a92fSRobert Love */ 80542e9a92fSRobert Love int fc_lport_config(struct fc_lport *); 80642e9a92fSRobert Love 80742e9a92fSRobert Love /* 80842e9a92fSRobert Love * Reset the local port. 80942e9a92fSRobert Love */ 81042e9a92fSRobert Love int fc_lport_reset(struct fc_lport *); 81142e9a92fSRobert Love 81242e9a92fSRobert Love /* 81342e9a92fSRobert Love * Set the mfs or reset 81442e9a92fSRobert Love */ 81542e9a92fSRobert Love int fc_set_mfs(struct fc_lport *lp, u32 mfs); 81642e9a92fSRobert Love 817174e1ebfSChris Leech /* 818174e1ebfSChris Leech * Allocate a new lport struct for an NPIV VN_Port 819174e1ebfSChris Leech */ 820174e1ebfSChris Leech struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize); 821174e1ebfSChris Leech 822174e1ebfSChris Leech /* 823174e1ebfSChris Leech * Find an NPIV VN_Port by port ID 824174e1ebfSChris Leech */ 825174e1ebfSChris Leech struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id); 82642e9a92fSRobert Love 82734f42a07SRobert Love /* 8288faecddbSChris Leech * NPIV VN_Port link state management 8298faecddbSChris Leech */ 8308faecddbSChris Leech void fc_vport_setlink(struct fc_lport *vn_port); 8318faecddbSChris Leech void fc_vports_linkchange(struct fc_lport *n_port); 8328faecddbSChris Leech 8338faecddbSChris Leech /* 83442e9a92fSRobert Love * REMOTE PORT LAYER 83542e9a92fSRobert Love *****************************/ 83642e9a92fSRobert Love int fc_rport_init(struct fc_lport *lp); 83742e9a92fSRobert Love void fc_rport_terminate_io(struct fc_rport *rp); 83842e9a92fSRobert Love 83934f42a07SRobert Love /* 84042e9a92fSRobert Love * DISCOVERY LAYER 84142e9a92fSRobert Love *****************************/ 84242e9a92fSRobert Love int fc_disc_init(struct fc_lport *lp); 84342e9a92fSRobert Love 84442e9a92fSRobert Love 84534f42a07SRobert Love /* 84642e9a92fSRobert Love * SCSI LAYER 84742e9a92fSRobert Love *****************************/ 84842e9a92fSRobert Love /* 84942e9a92fSRobert Love * Initialize the SCSI block of libfc 85042e9a92fSRobert Love */ 85142e9a92fSRobert Love int fc_fcp_init(struct fc_lport *); 85242e9a92fSRobert Love 85342e9a92fSRobert Love /* 85442e9a92fSRobert Love * This section provides an API which allows direct interaction 85542e9a92fSRobert Love * with the SCSI-ml. Each of these functions satisfies a function 85642e9a92fSRobert Love * pointer defined in Scsi_Host and therefore is always called 85742e9a92fSRobert Love * directly from the SCSI-ml. 85842e9a92fSRobert Love */ 85942e9a92fSRobert Love int fc_queuecommand(struct scsi_cmnd *sc_cmd, 86042e9a92fSRobert Love void (*done)(struct scsi_cmnd *)); 86142e9a92fSRobert Love 86242e9a92fSRobert Love /* 86342e9a92fSRobert Love * Send an ABTS frame to the target device. The sc_cmd argument 86442e9a92fSRobert Love * is a pointer to the SCSI command to be aborted. 86542e9a92fSRobert Love */ 86642e9a92fSRobert Love int fc_eh_abort(struct scsi_cmnd *sc_cmd); 86742e9a92fSRobert Love 86842e9a92fSRobert Love /* 86942e9a92fSRobert Love * Reset a LUN by sending send the tm cmd to the target. 87042e9a92fSRobert Love */ 87142e9a92fSRobert Love int fc_eh_device_reset(struct scsi_cmnd *sc_cmd); 87242e9a92fSRobert Love 87342e9a92fSRobert Love /* 87442e9a92fSRobert Love * Reset the host adapter. 87542e9a92fSRobert Love */ 87642e9a92fSRobert Love int fc_eh_host_reset(struct scsi_cmnd *sc_cmd); 87742e9a92fSRobert Love 87842e9a92fSRobert Love /* 87942e9a92fSRobert Love * Check rport status. 88042e9a92fSRobert Love */ 88142e9a92fSRobert Love int fc_slave_alloc(struct scsi_device *sdev); 88242e9a92fSRobert Love 88342e9a92fSRobert Love /* 88442e9a92fSRobert Love * Adjust the queue depth. 88542e9a92fSRobert Love */ 886e881a172SMike Christie int fc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason); 88742e9a92fSRobert Love 88842e9a92fSRobert Love /* 88942e9a92fSRobert Love * Change the tag type. 89042e9a92fSRobert Love */ 89142e9a92fSRobert Love int fc_change_queue_type(struct scsi_device *sdev, int tag_type); 89242e9a92fSRobert Love 89342e9a92fSRobert Love /* 89442e9a92fSRobert Love * Free memory pools used by the FCP layer. 89542e9a92fSRobert Love */ 89642e9a92fSRobert Love void fc_fcp_destroy(struct fc_lport *); 89742e9a92fSRobert Love 89834f42a07SRobert Love /* 89942e9a92fSRobert Love * ELS/CT interface 90042e9a92fSRobert Love *****************************/ 90142e9a92fSRobert Love /* 90242e9a92fSRobert Love * Initializes ELS/CT interface 90342e9a92fSRobert Love */ 90442e9a92fSRobert Love int fc_elsct_init(struct fc_lport *lp); 90511b56188SChris Leech struct fc_seq *fc_elsct_send(struct fc_lport *lport, 90611b56188SChris Leech u32 did, 90711b56188SChris Leech struct fc_frame *fp, 90811b56188SChris Leech unsigned int op, 90911b56188SChris Leech void (*resp)(struct fc_seq *, 91011b56188SChris Leech struct fc_frame *fp, 91111b56188SChris Leech void *arg), 91211b56188SChris Leech void *arg, u32 timer_msec); 91311b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *); 91411b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *); 91542e9a92fSRobert Love 91642e9a92fSRobert Love 91734f42a07SRobert Love /* 91842e9a92fSRobert Love * EXCHANGE MANAGER LAYER 91942e9a92fSRobert Love *****************************/ 92042e9a92fSRobert Love /* 92142e9a92fSRobert Love * Initializes Exchange Manager related 92242e9a92fSRobert Love * function pointers in struct libfc_function_template. 92342e9a92fSRobert Love */ 92442e9a92fSRobert Love int fc_exch_init(struct fc_lport *lp); 92542e9a92fSRobert Love 92642e9a92fSRobert Love /* 92796316099SVasu Dev * Adds Exchange Manager (EM) mp to lport. 92896316099SVasu Dev * 92996316099SVasu Dev * Adds specified mp to lport using struct fc_exch_mgr_anchor, 93096316099SVasu Dev * the struct fc_exch_mgr_anchor allows same EM sharing by 93196316099SVasu Dev * more than one lport with their specified match function, 93296316099SVasu Dev * the match function is used in allocating exchange from 93396316099SVasu Dev * added mp. 93496316099SVasu Dev */ 93596316099SVasu Dev struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport, 93696316099SVasu Dev struct fc_exch_mgr *mp, 93796316099SVasu Dev bool (*match)(struct fc_frame *)); 93896316099SVasu Dev 93996316099SVasu Dev /* 94096316099SVasu Dev * Deletes Exchange Manager (EM) from lport by removing 94196316099SVasu Dev * its anchor ema from lport. 94296316099SVasu Dev * 94396316099SVasu Dev * If removed anchor ema was the last user of its associated EM 94496316099SVasu Dev * then also destroys associated EM. 94596316099SVasu Dev */ 94696316099SVasu Dev void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema); 94796316099SVasu Dev 94896316099SVasu Dev /* 949174e1ebfSChris Leech * Clone an exchange manager list, getting reference holds for each EM. 950174e1ebfSChris Leech * This is for use with NPIV and sharing the X_ID space between VN_Ports. 951174e1ebfSChris Leech */ 952174e1ebfSChris Leech int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst); 953174e1ebfSChris Leech 954174e1ebfSChris Leech /* 95542e9a92fSRobert Love * Allocates an Exchange Manager (EM). 95642e9a92fSRobert Love * 95742e9a92fSRobert Love * The EM manages exchanges for their allocation and 95842e9a92fSRobert Love * free, also allows exchange lookup for received 95942e9a92fSRobert Love * frame. 96042e9a92fSRobert Love * 96142e9a92fSRobert Love * The class is used for initializing FC class of 96242e9a92fSRobert Love * allocated exchange from EM. 96342e9a92fSRobert Love * 96442e9a92fSRobert Love * The min_xid and max_xid will limit new 96542e9a92fSRobert Love * exchange ID (XID) within this range for 96642e9a92fSRobert Love * a new exchange. 96742e9a92fSRobert Love * The LLD may choose to have multiple EMs, 96842e9a92fSRobert Love * e.g. one EM instance per CPU receive thread in LLD. 96942e9a92fSRobert Love * 97052ff878cSVasu Dev * Specified match function is used in allocating exchanges 97152ff878cSVasu Dev * from newly allocated EM. 97242e9a92fSRobert Love */ 97342e9a92fSRobert Love struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp, 97442e9a92fSRobert Love enum fc_class class, 97542e9a92fSRobert Love u16 min_xid, 97652ff878cSVasu Dev u16 max_xid, 97752ff878cSVasu Dev bool (*match)(struct fc_frame *)); 97842e9a92fSRobert Love 97942e9a92fSRobert Love /* 98052ff878cSVasu Dev * Free all exchange managers of a lport. 98142e9a92fSRobert Love */ 98252ff878cSVasu Dev void fc_exch_mgr_free(struct fc_lport *lport); 98342e9a92fSRobert Love 98442e9a92fSRobert Love /* 98542e9a92fSRobert Love * Receive a frame on specified local port and exchange manager. 98642e9a92fSRobert Love */ 98752ff878cSVasu Dev void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp); 98842e9a92fSRobert Love 98942e9a92fSRobert Love /* 990b2f0091fSVasu Dev * Reset all EMs of a lport, releasing its all sequences and 991b2f0091fSVasu Dev * exchanges. If sid is non-zero, then reset only exchanges 992b2f0091fSVasu Dev * we sourced from that FID. If did is non-zero, reset only 993b2f0091fSVasu Dev * exchanges destined to that FID. 99442e9a92fSRobert Love */ 9951f6ff364SAbhijeet Joglekar void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id); 99642e9a92fSRobert Love 99742e9a92fSRobert Love /* 99842e9a92fSRobert Love * Functions for fc_functions_template 99942e9a92fSRobert Love */ 100042e9a92fSRobert Love void fc_get_host_speed(struct Scsi_Host *shost); 100142e9a92fSRobert Love void fc_get_host_port_type(struct Scsi_Host *shost); 100242e9a92fSRobert Love void fc_get_host_port_state(struct Scsi_Host *shost); 100342e9a92fSRobert Love void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout); 100442e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); 100542e9a92fSRobert Love 100642e9a92fSRobert Love #endif /* _LIBFC_H_ */ 1007