2 * Copyright(c) 2007 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
23 #include <linux/timer.h>
25 #include <linux/percpu.h>
27 #include <scsi/scsi_transport.h>
28 #include <scsi/scsi_transport_fc.h>
30 #include <scsi/fc/fc_fcp.h>
31 #include <scsi/fc/fc_ns.h>
32 #include <scsi/fc/fc_els.h>
33 #include <scsi/fc/fc_gs.h>
35 #include <scsi/fc_frame.h>
41 #define FC_DBG(fmt, args...) \
43 printk(KERN_INFO "%s " fmt, __func__, ##args); \
46 #define FC_DBG(fmt, args...)
52 #define FC_NO_ERR 0 /* no error */
53 #define FC_EX_TIMEOUT 1 /* Exchange timeout */
54 #define FC_EX_CLOSED 2 /* Exchange closed */
56 /* some helpful macros */
58 #define ntohll(x) be64_to_cpu(x)
59 #define htonll(x) cpu_to_be64(x)
61 #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2]))
63 #define hton24(p, v) do { \
64 p[0] = (((v) >> 16) & 0xFF); \
65 p[1] = (((v) >> 8) & 0xFF); \
66 p[2] = ((v) & 0xFF); \
92 RPORT_ST_INIT, /* initialized */
93 RPORT_ST_PLOGI, /* waiting for PLOGI completion */
94 RPORT_ST_PRLI, /* waiting for PRLI completion */
95 RPORT_ST_RTV, /* waiting for RTV completion */
96 RPORT_ST_READY, /* ready for use */
97 RPORT_ST_LOGO, /* port logout sent */
100 enum fc_rport_trans_state {
106 * struct fc_disc_port - temporary discovery port to hold rport identifiers
107 * @lp: Fibre Channel host port instance
108 * @peers: node for list management during discovery and RSCN processing
109 * @ids: identifiers structure to pass to fc_remote_port_add()
110 * @rport_work: work struct for starting the rport state machine
112 struct fc_disc_port {
114 struct list_head peers;
115 struct fc_rport_identifiers ids;
116 struct work_struct rport_work;
119 enum fc_rport_event {
127 struct fc_rport_operations {
128 void (*event_callback)(struct fc_lport *, struct fc_rport *,
129 enum fc_rport_event);
133 * struct fc_rport_libfc_priv - libfc internal information about a remote port
134 * @local_port: Fibre Channel host port instance
135 * @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges
136 * @flags: REC and RETRY supported flags
137 * @max_seq: maximum number of concurrent sequences
138 * @retries: retry count in current state
139 * @e_d_tov: error detect timeout value (in msec)
140 * @r_a_tov: resource allocation timeout value (in msec)
141 * @rp_mutex: mutex protects rport
143 * @event_callback: Callback for rport READY, FAILED or LOGO
145 struct fc_rport_libfc_priv {
146 struct fc_lport *local_port;
147 enum fc_rport_state rp_state;
149 #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
150 #define FC_RP_FLAGS_RETRY (1 << 1)
152 unsigned int retries;
153 unsigned int e_d_tov;
154 unsigned int r_a_tov;
155 enum fc_rport_trans_state trans_state;
156 struct mutex rp_mutex;
157 struct delayed_work retry_work;
158 enum fc_rport_event event;
159 struct fc_rport_operations *ops;
160 struct list_head peers;
161 struct work_struct event_work;
164 #define PRIV_TO_RPORT(x) \
165 (struct fc_rport *)((void *)x - sizeof(struct fc_rport));
166 #define RPORT_TO_PRIV(x) \
167 (struct fc_rport_libfc_priv *)((void *)x + sizeof(struct fc_rport));
169 struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *);
171 static inline void fc_rport_set_name(struct fc_rport *rport, u64 wwpn, u64 wwnn)
173 rport->node_name = wwnn;
174 rport->port_name = wwpn;
178 * fcoe stats structure
180 struct fcoe_dev_stats {
181 u64 SecondsSinceLastReset;
188 u64 LinkFailureCount;
189 u64 LossOfSignalCount;
190 u64 InvalidTxWordCount;
200 * els data is used for passing ELS respone specific
201 * data to send ELS response mainly using infomation
202 * in exchange and sequence in EM layer.
204 struct fc_seq_els_data {
206 enum fc_els_rjt_reason reason;
207 enum fc_els_rjt_explan explan;
211 * FCP request structure, one for each scsi cmd request
217 struct fc_lport *lp; /* handle to hba struct */
218 u16 state; /* scsi_pkt state state */
219 u16 tgt_flags; /* target flags */
220 atomic_t ref_cnt; /* fcp pkt ref count */
221 spinlock_t scsi_pkt_lock; /* Must be taken before the host lock
222 * if both are held at the same time */
224 * SCSI I/O related stuff
226 struct scsi_cmnd *cmd; /* scsi command pointer. set/clear
228 struct list_head list; /* tracks queued commands. access under
231 * timeout related stuff
233 struct timer_list timer; /* command timer */
234 struct completion tm_done;
236 unsigned long start_time; /* start jiffie */
237 unsigned long end_time; /* end jiffie */
238 unsigned long last_pkt_time; /* jiffies of last frame received */
241 * scsi cmd and data transfer information
245 * transport related veriables
247 struct fcp_cmnd cdb_cmd;
249 u16 xfer_ddp; /* this xfer is ddped */
250 u32 xfer_contig_end; /* offset of end of contiguous xfer */
251 u16 max_payload; /* max payload size in bytes */
254 * scsi/fcp return status
256 u32 io_status; /* SCSI result upper 24 bits */
258 u8 status_code; /* FCP I/O status */
259 /* bit 3 Underrun bit 2: overrun */
261 u32 req_flags; /* bit 0: read bit:1 write */
262 u32 scsi_resid; /* residule length */
264 struct fc_rport *rport; /* remote port pointer */
265 struct fc_seq *seq_ptr; /* current sequence pointer */
269 u8 recov_retry; /* count of recovery retries */
270 struct fc_seq *recov_seq; /* sequence for REC or SRR */
273 * FC_FCP HELPER FUNCTIONS
274 *****************************/
275 static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
278 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
283 * Structure and function definitions for managing Fibre Channel Exchanges
286 * fc_exch holds state for one exchange and links to its active sequence.
288 * fc_seq holds the state for an individual sequence.
298 u16 ssb_stat; /* status flags for sequence status block */
299 u16 cnt; /* frames sent so far on sequence */
300 u32 rec_data; /* FC-4 value for REC */
303 #define FC_EX_DONE (1 << 0) /* ep is completed */
304 #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
309 * Locking notes: The ex_lock protects following items:
310 * state, esb_stat, f_ctl, seq.ssb_stat
312 * sequence allocation
315 struct fc_exch_mgr *em; /* exchange manager */
316 u32 state; /* internal driver state */
317 u16 xid; /* our exchange ID */
318 struct list_head ex_list; /* free or busy list linkage */
319 spinlock_t ex_lock; /* lock covering exchange state */
320 atomic_t ex_refcnt; /* reference counter */
321 struct delayed_work timeout_work; /* timer for upper level protocols */
322 struct fc_lport *lp; /* fc device instance */
323 u16 oxid; /* originator's exchange ID */
324 u16 rxid; /* responder's exchange ID */
325 u32 oid; /* originator's FCID */
326 u32 sid; /* source FCID */
327 u32 did; /* destination FCID */
328 u32 esb_stat; /* exchange status for ESB */
329 u32 r_a_tov; /* r_a_tov from rport (msec) */
330 u8 seq_id; /* next sequence ID to use */
331 u32 f_ctl; /* F_CTL flags for sequences */
332 u8 fh_type; /* frame type */
333 enum fc_class class; /* class of service */
334 struct fc_seq seq; /* single sequence */
336 * Handler for responses to this current exchange.
338 void (*resp)(struct fc_seq *, struct fc_frame *, void *);
339 void (*destructor)(struct fc_seq *, void *);
341 * arg is passed as void pointer to exchange
342 * resp and destructor handlers
346 #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
348 struct libfc_function_template {
351 * Interface to send a FC frame
355 int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp);
358 * Interface to send ELS/CT frames
362 struct fc_seq *(*elsct_send)(struct fc_lport *lport,
363 struct fc_rport *rport,
366 void (*resp)(struct fc_seq *,
369 void *arg, u32 timer_msec);
372 * Send the FC frame payload using a new exchange and sequence.
374 * The frame pointer with some of the header's fields must be
375 * filled before calling exch_seq_send(), those fields are,
382 * - parameter or relative offset
384 * The exchange response handler is set in this routine to resp()
385 * function pointer. It can be called in two scenarios: if a timeout
386 * occurs or if a response frame is received for the exchange. The
387 * fc_frame pointer in response handler will also indicate timeout
388 * as error using IS_ERR related macros.
390 * The exchange destructor handler is also set in this routine.
391 * The destructor handler is invoked by EM layer when exchange
392 * is about to free, this can be used by caller to free its
393 * resources along with exchange free.
395 * The arg is passed back to resp and destructor handler.
397 * The timeout value (in msec) for an exchange is set if non zero
398 * timer_msec argument is specified. The timer is canceled when
399 * it fires or when the exchange is done. The exchange timeout handler
400 * is registered by EM layer.
404 struct fc_seq *(*exch_seq_send)(struct fc_lport *lp,
406 void (*resp)(struct fc_seq *sp,
409 void (*destructor)(struct fc_seq *sp,
411 void *arg, unsigned int timer_msec);
414 * Sets up the DDP context for a given exchange id on the given
415 * scatterlist if LLD supports DDP for large receive.
419 int (*ddp_setup)(struct fc_lport *lp, u16 xid,
420 struct scatterlist *sgl, unsigned int sgc);
422 * Completes the DDP transfer and returns the length of data DDPed
423 * for the given exchange id.
427 int (*ddp_done)(struct fc_lport *lp, u16 xid);
429 * Send a frame using an existing sequence and exchange.
433 int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp,
434 struct fc_frame *fp);
437 * Send an ELS response using infomation from a previous
438 * exchange and sequence.
442 void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd,
443 struct fc_seq_els_data *els_data);
446 * Abort an exchange and sequence. Generally called because of a
447 * exchange timeout or an abort from the upper layer.
449 * A timer_msec can be specified for abort timeout, if non-zero
450 * timer_msec value is specified then exchange resp handler
451 * will be called with timeout error if no response to abort.
455 int (*seq_exch_abort)(const struct fc_seq *req_sp,
456 unsigned int timer_msec);
459 * Indicate that an exchange/sequence tuple is complete and the memory
460 * allocated for the related objects may be freed.
464 void (*exch_done)(struct fc_seq *sp);
467 * Assigns a EM and a free XID for an new exchange and then
468 * allocates a new exchange and sequence pair.
469 * The fp can be used to determine free XID.
473 struct fc_exch *(*exch_get)(struct fc_lport *lp, struct fc_frame *fp);
476 * Release previously assigned XID by exch_get API.
477 * The LLD may implement this if XID is assigned by LLD
482 void (*exch_put)(struct fc_lport *lp, struct fc_exch_mgr *mp,
486 * Start a new sequence on the same exchange/sequence tuple.
490 struct fc_seq *(*seq_start_next)(struct fc_seq *sp);
493 * Reset an exchange manager, completing all sequences and exchanges.
494 * If s_id is non-zero, reset only exchanges originating from that FID.
495 * If d_id is non-zero, reset only exchanges sending to that FID.
499 void (*exch_mgr_reset)(struct fc_lport *,
503 * Flush the rport work queue. Generally used before shutdown.
507 void (*rport_flush_queue)(void);
510 * Receive a frame for a local port.
514 void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp,
515 struct fc_frame *fp);
518 * Reset the local port.
522 int (*lport_reset)(struct fc_lport *);
525 * Create a remote port
527 struct fc_rport *(*rport_create)(struct fc_disc_port *);
530 * Initiates the RP state machine. It is called from the LP module.
531 * This function will issue the following commands to the N_Port
532 * identified by the FC ID provided.
540 int (*rport_login)(struct fc_rport *rport);
543 * Logoff, and remove the rport from the transport if
544 * it had been added. This will send a LOGO to the target.
548 int (*rport_logoff)(struct fc_rport *rport);
551 * Recieve a request from a remote port.
555 void (*rport_recv_req)(struct fc_seq *, struct fc_frame *,
559 * lookup an rport by it's port ID.
563 struct fc_rport *(*rport_lookup)(const struct fc_lport *, u32);
566 * Send a fcp cmd from fsp pkt.
567 * Called with the SCSI host lock unlocked and irqs disabled.
569 * The resp handler is called when FCP_RSP received.
573 int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
574 void (*resp)(struct fc_seq *, struct fc_frame *fp,
578 * Cleanup the FCP layer, used durring link down and reset
582 void (*fcp_cleanup)(struct fc_lport *lp);
585 * Abort all I/O on a local port
589 void (*fcp_abort_io)(struct fc_lport *lp);
592 * Receive a request for the discovery layer.
596 void (*disc_recv_req)(struct fc_seq *,
597 struct fc_frame *, struct fc_lport *);
600 * Start discovery for a local port.
604 void (*disc_start)(void (*disc_callback)(struct fc_lport *,
609 * Stop discovery for a given lport. This will remove
610 * all discovered rports
614 void (*disc_stop) (struct fc_lport *);
617 * Stop discovery for a given lport. This will block
618 * until all discovered rports are deleted from the
623 void (*disc_stop_final) (struct fc_lport *);
626 /* information used by the discovery layer */
628 unsigned char retry_count;
630 unsigned char pending;
631 unsigned char requested;
632 unsigned short seq_count;
633 unsigned char buf_len;
634 enum fc_disc_event event;
636 void (*disc_callback)(struct fc_lport *,
639 struct list_head rports;
640 struct list_head rogue_rports;
641 struct fc_lport *lport;
642 struct mutex disc_mutex;
643 struct fc_gpn_ft_resp partial_buf; /* partial name buffer */
644 struct delayed_work disc_work;
648 struct list_head list;
651 struct Scsi_Host *host;
652 struct fc_exch_mgr *emp;
653 struct fc_rport *dns_rp;
654 struct fc_rport *ptp_rp;
658 /* Operational Information */
659 struct libfc_function_template tt;
662 enum fc_lport_state state;
663 unsigned long boot_time;
665 struct fc_host_statistics host_stats;
666 struct fcoe_dev_stats *dev_stats;
673 u32 sg_supp:1; /* scatter gather supported */
674 u32 seq_offload:1; /* seq offload supported */
675 u32 crc_offload:1; /* crc offload supported */
676 u32 lro_enabled:1; /* large receive offload */
677 u32 mfs; /* max FC payload size */
678 unsigned int service_params;
679 unsigned int e_d_tov;
680 unsigned int r_a_tov;
683 u16 link_supported_speeds;
684 u16 lro_xid; /* max xid for fcoe lro */
685 unsigned int lso_max; /* max large send size */
686 struct fc_ns_fts fcts; /* FC-4 type masks */
687 struct fc_els_rnid_gen rnid_gen; /* RNID information */
690 struct mutex lp_mutex;
693 struct delayed_work retry_work;
694 struct delayed_work disc_work;
698 * FC_LPORT HELPER FUNCTIONS
699 *****************************/
700 static inline int fc_lport_test_ready(struct fc_lport *lp)
702 return lp->state == LPORT_ST_READY;
705 static inline void fc_set_wwnn(struct fc_lport *lp, u64 wwnn)
710 static inline void fc_set_wwpn(struct fc_lport *lp, u64 wwnn)
715 static inline void fc_lport_state_enter(struct fc_lport *lp,
716 enum fc_lport_state state)
718 if (state != lp->state)
723 static inline int fc_lport_init_stats(struct fc_lport *lp)
725 /* allocate per cpu stats block */
726 lp->dev_stats = alloc_percpu(struct fcoe_dev_stats);
732 static inline void fc_lport_free_stats(struct fc_lport *lp)
734 free_percpu(lp->dev_stats);
737 static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lp)
739 return per_cpu_ptr(lp->dev_stats, smp_processor_id());
742 static inline void *lport_priv(const struct fc_lport *lp)
744 return (void *)(lp + 1);
748 * libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport
749 * @sht: ptr to the scsi host templ
750 * @priv_size: size of private data after fc_lport
752 * Returns: ptr to Scsi_Host
754 static inline struct Scsi_Host *
755 libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
757 return scsi_host_alloc(sht, sizeof(struct fc_lport) + priv_size);
762 *****************************/
763 int fc_lport_init(struct fc_lport *lp);
766 * Destroy the specified local port by finding and freeing all
767 * fc_rports associated with it and then by freeing the fc_lport
770 int fc_lport_destroy(struct fc_lport *lp);
773 * Logout the specified local port from the fabric
775 int fc_fabric_logoff(struct fc_lport *lp);
778 * Initiate the LP state machine. This handler will use fc_host_attr
779 * to store the FLOGI service parameters, so fc_host_attr must be
780 * initialized before calling this handler.
782 int fc_fabric_login(struct fc_lport *lp);
785 * The link is up for the given local port.
787 void fc_linkup(struct fc_lport *);
790 * Link is down for the given local port.
792 void fc_linkdown(struct fc_lport *);
795 * Configure the local port.
797 int fc_lport_config(struct fc_lport *);
800 * Reset the local port.
802 int fc_lport_reset(struct fc_lport *);
805 * Set the mfs or reset
807 int fc_set_mfs(struct fc_lport *lp, u32 mfs);
812 *****************************/
813 int fc_rport_init(struct fc_lport *lp);
814 void fc_rport_terminate_io(struct fc_rport *rp);
818 *****************************/
819 int fc_disc_init(struct fc_lport *lp);
824 *****************************/
826 * Initialize the SCSI block of libfc
828 int fc_fcp_init(struct fc_lport *);
831 * This section provides an API which allows direct interaction
832 * with the SCSI-ml. Each of these functions satisfies a function
833 * pointer defined in Scsi_Host and therefore is always called
834 * directly from the SCSI-ml.
836 int fc_queuecommand(struct scsi_cmnd *sc_cmd,
837 void (*done)(struct scsi_cmnd *));
840 * complete processing of a fcp packet
842 * This function may sleep if a fsp timer is pending.
843 * The host lock must not be held by caller.
845 void fc_fcp_complete(struct fc_fcp_pkt *fsp);
848 * Send an ABTS frame to the target device. The sc_cmd argument
849 * is a pointer to the SCSI command to be aborted.
851 int fc_eh_abort(struct scsi_cmnd *sc_cmd);
854 * Reset a LUN by sending send the tm cmd to the target.
856 int fc_eh_device_reset(struct scsi_cmnd *sc_cmd);
859 * Reset the host adapter.
861 int fc_eh_host_reset(struct scsi_cmnd *sc_cmd);
864 * Check rport status.
866 int fc_slave_alloc(struct scsi_device *sdev);
869 * Adjust the queue depth.
871 int fc_change_queue_depth(struct scsi_device *sdev, int qdepth);
874 * Change the tag type.
876 int fc_change_queue_type(struct scsi_device *sdev, int tag_type);
879 * Free memory pools used by the FCP layer.
881 void fc_fcp_destroy(struct fc_lport *);
884 * Set up direct-data placement for this I/O request
886 void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid);
890 *****************************/
892 * Initializes ELS/CT interface
894 int fc_elsct_init(struct fc_lport *lp);
898 * EXCHANGE MANAGER LAYER
899 *****************************/
901 * Initializes Exchange Manager related
902 * function pointers in struct libfc_function_template.
904 int fc_exch_init(struct fc_lport *lp);
907 * Allocates an Exchange Manager (EM).
909 * The EM manages exchanges for their allocation and
910 * free, also allows exchange lookup for received
913 * The class is used for initializing FC class of
914 * allocated exchange from EM.
916 * The min_xid and max_xid will limit new
917 * exchange ID (XID) within this range for
919 * The LLD may choose to have multiple EMs,
920 * e.g. one EM instance per CPU receive thread in LLD.
921 * The LLD can use exch_get() of struct libfc_function_template
922 * to specify XID for a new exchange within
923 * a specified EM instance.
925 * The em_idx to uniquely identify an EM instance.
927 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
933 * Free an exchange manager.
935 void fc_exch_mgr_free(struct fc_exch_mgr *mp);
938 * Receive a frame on specified local port and exchange manager.
940 void fc_exch_recv(struct fc_lport *lp, struct fc_exch_mgr *mp,
941 struct fc_frame *fp);
944 * This function is for exch_seq_send function pointer in
945 * struct libfc_function_template, see comment block on
946 * exch_seq_send for description of this function.
948 struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
950 void (*resp)(struct fc_seq *sp,
953 void (*destructor)(struct fc_seq *sp,
955 void *arg, u32 timer_msec);
958 * send a frame using existing sequence and exchange.
960 int fc_seq_send(struct fc_lport *lp, struct fc_seq *sp, struct fc_frame *fp);
963 * Send ELS response using mainly infomation
964 * in exchange and sequence in EM layer.
966 void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd,
967 struct fc_seq_els_data *els_data);
970 * This function is for seq_exch_abort function pointer in
971 * struct libfc_function_template, see comment block on
972 * seq_exch_abort for description of this function.
974 int fc_seq_exch_abort(const struct fc_seq *req_sp, unsigned int timer_msec);
977 * Indicate that an exchange/sequence tuple is complete and the memory
978 * allocated for the related objects may be freed.
980 void fc_exch_done(struct fc_seq *sp);
983 * Assigns a EM and XID for a frame and then allocates
984 * a new exchange and sequence pair.
985 * The fp can be used to determine free XID.
987 struct fc_exch *fc_exch_get(struct fc_lport *lp, struct fc_frame *fp);
990 * Allocate a new exchange and sequence pair.
991 * if ex_id is zero then next free exchange id
992 * from specified exchange manger mp will be assigned.
994 struct fc_exch *fc_exch_alloc(struct fc_exch_mgr *mp,
995 struct fc_frame *fp, u16 ex_id);
997 * Start a new sequence on the same exchange as the supplied sequence.
999 struct fc_seq *fc_seq_start_next(struct fc_seq *sp);
1002 * Reset an exchange manager, completing all sequences and exchanges.
1003 * If s_id is non-zero, reset only exchanges originating from that FID.
1004 * If d_id is non-zero, reset only exchanges sending to that FID.
1006 void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
1009 * Functions for fc_functions_template
1011 void fc_get_host_speed(struct Scsi_Host *shost);
1012 void fc_get_host_port_type(struct Scsi_Host *shost);
1013 void fc_get_host_port_state(struct Scsi_Host *shost);
1014 void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout);
1015 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1018 * module setup functions.
1020 int fc_setup_exch_mgr(void);
1021 void fc_destroy_exch_mgr(void);
1022 int fc_setup_rport(void);
1023 void fc_destroy_rport(void);
1025 #endif /* _LIBFC_H_ */