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>
26 #include <linux/refcount.h>
28 #include <scsi/scsi_transport.h>
29 #include <scsi/scsi_transport_fc.h>
30 #include <scsi/scsi_bsg_fc.h>
32 #include <scsi/fc/fc_fcp.h>
33 #include <scsi/fc/fc_ns.h>
34 #include <scsi/fc/fc_ms.h>
35 #include <scsi/fc/fc_els.h>
36 #include <scsi/fc/fc_gs.h>
38 #include <scsi/fc_frame.h>
40 #define FC_FC4_PROV_SIZE (FC_TYPE_FCP + 1) /* size of tables */
45 #define FC_NO_ERR 0 /* no error */
46 #define FC_EX_TIMEOUT 1 /* Exchange timeout */
47 #define FC_EX_CLOSED 2 /* Exchange closed */
48 #define FC_EX_ALLOC_ERR 3 /* Exchange allocation failed */
49 #define FC_EX_XMIT_ERR 4 /* Exchange transmit failed */
50 #define FC_EX_ELS_RJT 5 /* ELS rejected */
51 #define FC_EX_INV_LOGIN 6 /* Login not completed */
52 #define FC_EX_SEQ_ERR 6 /* Exchange sequence error */
55 * enum fc_lport_state - Local port states
56 * @LPORT_ST_DISABLED: Disabled
57 * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent
58 * @LPORT_ST_DNS: Waiting for name server remote port to become ready
59 * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent
60 * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent
61 * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent
62 * @LPORT_ST_FDMI: Waiting for mgmt server rport to become ready
64 * @LPORT_ST_SCR: State Change Register (SCR) sent
65 * @LPORT_ST_READY: Ready for use
66 * @LPORT_ST_LOGO: Local port logout (LOGO) sent
67 * @LPORT_ST_RESET: Local port reset
70 LPORT_ST_DISABLED = 0,
96 * enum fc_rport_state - Remote port states
97 * @RPORT_ST_INIT: Initialized
98 * @RPORT_ST_FLOGI: Waiting for FLOGI completion for point-to-multipoint
99 * @RPORT_ST_PLOGI_WAIT: Waiting for peer to login for point-to-multipoint
100 * @RPORT_ST_PLOGI: Waiting for PLOGI completion
101 * @RPORT_ST_PRLI: Waiting for PRLI completion
102 * @RPORT_ST_RTV: Waiting for RTV completion
103 * @RPORT_ST_READY: Ready for use
104 * @RPORT_ST_ADISC: Discover Address sent
105 * @RPORT_ST_DELETE: Remote port being deleted
107 enum fc_rport_state {
120 * struct fc_disc_port - temporary discovery port to hold rport identifiers
121 * @lp: Fibre Channel host port instance
122 * @peers: Node for list management during discovery and RSCN processing
123 * @rport_work: Work struct for starting the rport state machine
124 * @port_id: Port ID of the discovered port
126 struct fc_disc_port {
128 struct list_head peers;
129 struct work_struct rport_work;
134 * enum fc_rport_event - Remote port events
135 * @RPORT_EV_NONE: No event
136 * @RPORT_EV_READY: Remote port is ready for use
137 * @RPORT_EV_FAILED: State machine failed, remote port is not ready
138 * @RPORT_EV_STOP: Remote port has been stopped
139 * @RPORT_EV_LOGO: Remote port logout (LOGO) sent
141 enum fc_rport_event {
149 struct fc_rport_priv;
152 * struct fc_rport_operations - Operations for a remote port
153 * @event_callback: Function to be called for remote port events
155 struct fc_rport_operations {
156 void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
157 enum fc_rport_event);
161 * struct fc_rport_libfc_priv - libfc internal information about a remote port
162 * @local_port: The associated local port
163 * @rp_state: Indicates READY for I/O or DELETE when blocked
164 * @flags: REC and RETRY supported flags
165 * @e_d_tov: Error detect timeout value (in msec)
166 * @r_a_tov: Resource allocation timeout value (in msec)
168 struct fc_rport_libfc_priv {
169 struct fc_lport *local_port;
170 enum fc_rport_state rp_state;
172 #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
173 #define FC_RP_FLAGS_RETRY (1 << 1)
174 #define FC_RP_STARTED (1 << 2)
175 #define FC_RP_FLAGS_CONF_REQ (1 << 3)
176 unsigned int e_d_tov;
177 unsigned int r_a_tov;
181 * struct fc_rport_priv - libfc remote port and discovery info
182 * @local_port: The associated local port
183 * @rport: The FC transport remote port
184 * @kref: Reference counter
185 * @rp_state: Enumeration that tracks progress of PLOGI, PRLI,
187 * @ids: The remote port identifiers and roles
188 * @flags: STARTED, REC and RETRY_SUPPORTED flags
189 * @max_seq: Maximum number of concurrent sequences
190 * @disc_id: The discovery identifier
191 * @maxframe_size: The maximum frame size
192 * @retries: The retry count for the current state
193 * @major_retries: The retry count for the entire PLOGI/PRLI state machine
194 * @e_d_tov: Error detect timeout value (in msec)
195 * @r_a_tov: Resource allocation timeout value (in msec)
196 * @rp_mutex: The mutex that protects the remote port
197 * @retry_work: Handle for retries
198 * @event_callback: Callback when READY, FAILED or LOGO states complete
199 * @prli_count: Count of open PRLI sessions in providers
200 * @rcu: Structure used for freeing in an RCU-safe manner
202 struct fc_rport_priv {
203 struct fc_lport *local_port;
204 struct fc_rport *rport;
206 enum fc_rport_state rp_state;
207 struct fc_rport_identifiers ids;
212 unsigned int retries;
213 unsigned int major_retries;
214 unsigned int e_d_tov;
215 unsigned int r_a_tov;
216 struct mutex rp_mutex;
217 struct delayed_work retry_work;
218 enum fc_rport_event event;
219 struct fc_rport_operations *ops;
220 struct list_head peers;
221 struct work_struct event_work;
222 u32 supported_classes;
227 void (*lld_event_callback)(struct fc_lport *,
228 struct fc_rport_priv *,
229 enum fc_rport_event);
233 * struct fc_stats - fc stats structure
234 * @SecondsSinceLastReset: Seconds since the last reset
235 * @TxFrames: Number of transmitted frames
236 * @TxWords: Number of transmitted words
237 * @RxFrames: Number of received frames
238 * @RxWords: Number of received words
239 * @ErrorFrames: Number of received error frames
240 * @DumpedFrames: Number of dumped frames
241 * @FcpPktAllocFails: Number of fcp packet allocation failures
242 * @FcpPktAborts: Number of fcp packet aborts
243 * @FcpFrameAllocFails: Number of fcp frame allocation failures
244 * @LinkFailureCount: Number of link failures
245 * @LossOfSignalCount: Number for signal losses
246 * @InvalidTxWordCount: Number of invalid transmitted words
247 * @InvalidCRCCount: Number of invalid CRCs
248 * @InputRequests: Number of input requests
249 * @OutputRequests: Number of output requests
250 * @ControlRequests: Number of control requests
251 * @InputBytes: Number of received bytes
252 * @OutputBytes: Number of transmitted bytes
253 * @VLinkFailureCount: Number of virtual link failures
254 * @MissDiscAdvCount: Number of missing FIP discovery advertisement
257 u64 SecondsSinceLastReset;
264 u64 FcpPktAllocFails;
266 u64 FcpFrameAllocFails;
267 u64 LinkFailureCount;
268 u64 LossOfSignalCount;
269 u64 InvalidTxWordCount;
276 u64 VLinkFailureCount;
277 u64 MissDiscAdvCount;
281 * struct fc_seq_els_data - ELS data used for passing ELS specific responses
282 * @reason: The reason for rejection
283 * @explan: The explanation of the rejection
285 * Mainly used by the exchange manager layer.
287 struct fc_seq_els_data {
288 enum fc_els_rjt_reason reason;
289 enum fc_els_rjt_explan explan;
293 * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request)
294 * @lp: The associated local port
295 * @state: The state of the I/O
296 * @ref_cnt: Reference count
297 * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the
298 * host_lock if both are to be held at the same time)
299 * @cmd: The SCSI command (set and clear with the host_lock held)
300 * @list: Tracks queued commands (accessed with the host_lock held)
301 * @timer: The command timer
302 * @tm_done: Completion indicator
303 * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies)
304 * @data_len: The length of the data
305 * @cdb_cmd: The CDB command
306 * @xfer_len: The transfer length
307 * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange
308 * will be set here if DDP was setup)
309 * @xfer_contig_end: The offset into the buffer if the buffer is contiguous
311 * @max_payload: The maximum payload size (in bytes)
312 * @io_status: SCSI result (upper 24 bits)
313 * @cdb_status: CDB status
314 * @status_code: FCP I/O status
315 * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun)
316 * @req_flags: Request flags (bit 0: read bit:1 write)
317 * @scsi_resid: SCSI residule length
318 * @rport: The remote port that the SCSI command is targeted at
319 * @seq_ptr: The sequence that will carry the SCSI command
320 * @recov_retry: Number of recovery retries
321 * @recov_seq: The sequence for REC or SRR
324 spinlock_t scsi_pkt_lock;
327 /* SCSI command and data transfer information */
330 /* SCSI I/O related information */
331 struct scsi_cmnd *cmd;
332 struct list_head list;
334 /* Housekeeping information */
338 /* SCSI/FCP return status */
346 /* Transport related veriables */
348 struct fcp_cmnd cdb_cmd;
353 /* Associated structures */
354 struct fc_rport *rport;
355 struct fc_seq *seq_ptr;
357 /* Timeout/error related information */
358 struct timer_list timer;
362 struct fc_seq *recov_seq;
363 struct completion tm_done;
364 } ____cacheline_aligned_in_smp;
367 * Structure and function definitions for managing Fibre Channel Exchanges
370 * fc_exch holds state for one exchange and links to its active sequence.
372 * fc_seq holds the state for an individual sequence.
376 struct fc_exch_mgr_anchor;
377 extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
380 * struct fc_seq - FC sequence
381 * @id: The sequence ID
382 * @ssb_stat: Status flags for the sequence status block (SSB)
383 * @cnt: Number of frames sent so far
384 * @rec_data: FC-4 value for REC
393 #define FC_EX_DONE (1 << 0) /* ep is completed */
394 #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
395 #define FC_EX_QUARANTINE (1 << 2) /* exch is quarantined */
398 * struct fc_exch - Fibre Channel Exchange
399 * @em: Exchange manager
400 * @pool: Exchange pool
401 * @state: The exchange's state
402 * @xid: The exchange ID
403 * @ex_list: Handle used by the EM to track free exchanges
404 * @ex_lock: Lock that protects the exchange
405 * @ex_refcnt: Reference count
406 * @timeout_work: Handle for timeout handler
407 * @lp: The local port that this exchange is on
408 * @oxid: Originator's exchange ID
409 * @rxid: Responder's exchange ID
410 * @oid: Originator's FCID
412 * @did: Destination FCID
413 * @esb_stat: ESB exchange status
414 * @r_a_tov: Resouce allocation time out value (in msecs)
415 * @seq_id: The next sequence ID to use
416 * @encaps: encapsulation information for lower-level driver
417 * @f_ctl: F_CTL flags for the sequence
418 * @fh_type: The frame type
419 * @class: The class of service
420 * @seq: The sequence in use on this exchange
421 * @resp_active: Number of tasks that are concurrently executing @resp().
422 * @resp_task: If @resp_active > 0, either the task executing @resp(), the
423 * task that has been interrupted to execute the soft-IRQ
424 * executing @resp() or NULL if more than one task is executing
425 * @resp concurrently.
426 * @resp_wq: Waitqueue for the tasks waiting on @resp_active.
427 * @resp: Callback for responses on this exchange
428 * @destructor: Called when destroying the exchange
429 * @arg: Passed as a void pointer to the resp() callback
431 * Locking notes: The ex_lock protects following items:
432 * state, esb_stat, f_ctl, seq.ssb_stat
434 * sequence allocation
440 struct fc_exch_mgr *em;
441 struct fc_exch_pool *pool;
442 struct list_head ex_list;
459 struct task_struct *resp_task;
460 wait_queue_head_t resp_wq;
461 void (*resp)(struct fc_seq *, struct fc_frame *, void *);
463 void (*destructor)(struct fc_seq *, void *);
464 struct delayed_work timeout_work;
465 } ____cacheline_aligned_in_smp;
466 #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
469 struct libfc_function_template {
471 * Interface to send a FC frame
475 int (*frame_send)(struct fc_lport *, struct fc_frame *);
478 * Interface to send ELS/CT frames
482 struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did,
483 struct fc_frame *, unsigned int op,
484 void (*resp)(struct fc_seq *,
485 struct fc_frame *, void *arg),
486 void *arg, u32 timer_msec);
489 * Sets up the DDP context for a given exchange id on the given
490 * scatterlist if LLD supports DDP for large receive.
494 int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *,
497 * Completes the DDP transfer and returns the length of data DDPed
498 * for the given exchange id.
502 int (*ddp_done)(struct fc_lport *, u16);
504 * Sets up the DDP context for a given exchange id on the given
505 * scatterlist if LLD supports DDP for target.
509 int (*ddp_target)(struct fc_lport *, u16, struct scatterlist *,
512 * Allow LLD to fill its own Link Error Status Block
516 void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb);
519 * Reset an exchange manager, completing all sequences and exchanges.
520 * If s_id is non-zero, reset only exchanges originating from that FID.
521 * If d_id is non-zero, reset only exchanges sending to that FID.
525 void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
528 * Set the local port FC_ID.
530 * This may be provided by the LLD to allow it to be
531 * notified when the local port is assigned a FC-ID.
533 * The frame, if non-NULL, is the incoming frame with the
534 * FLOGI LS_ACC or FLOGI, and may contain the granted MAC
535 * address for the LLD. The frame pointer may be NULL if
536 * no MAC is associated with this assignment (LOGO or PLOGI).
538 * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid.
540 * Note: this is called with the local port mutex held.
544 void (*lport_set_port_id)(struct fc_lport *, u32 port_id,
548 * Callback routine after the remote port is logged in
552 void (*rport_event_callback)(struct fc_lport *,
553 struct fc_rport_priv *,
554 enum fc_rport_event);
557 * Send a fcp cmd from fsp pkt.
558 * Called with the SCSI host lock unlocked and irqs disabled.
560 * The resp handler is called when FCP_RSP received.
564 int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
565 void (*resp)(struct fc_seq *, struct fc_frame *,
569 * Cleanup the FCP layer, used during link down and reset
573 void (*fcp_cleanup)(struct fc_lport *);
576 * Abort all I/O on a local port
580 void (*fcp_abort_io)(struct fc_lport *);
583 * Receive a request for the discovery layer.
587 void (*disc_recv_req)(struct fc_lport *, struct fc_frame *);
590 * Start discovery for a local port.
594 void (*disc_start)(void (*disc_callback)(struct fc_lport *,
599 * Stop discovery for a given lport. This will remove
600 * all discovered rports
604 void (*disc_stop) (struct fc_lport *);
607 * Stop discovery for a given lport. This will block
608 * until all discovered rports are deleted from the
613 void (*disc_stop_final) (struct fc_lport *);
617 * struct fc_disc - Discovery context
618 * @retry_count: Number of retries
619 * @pending: 1 if discovery is pending, 0 if not
620 * @requested: 1 if discovery has been requested, 0 if not
621 * @seq_count: Number of sequences used for discovery
622 * @buf_len: Length of the discovery buffer
623 * @disc_id: Discovery ID
624 * @rports: List of discovered remote ports
625 * @priv: Private pointer for use by discovery code
626 * @disc_mutex: Mutex that protects the discovery context
627 * @partial_buf: Partial name buffer (if names are returned
628 * in multiple frames)
629 * @disc_work: handle for delayed work context
630 * @disc_callback: Callback routine called when discovery completes
633 unsigned char retry_count;
634 unsigned char pending;
635 unsigned char requested;
636 unsigned short seq_count;
637 unsigned char buf_len;
640 struct list_head rports;
642 struct mutex disc_mutex;
643 struct fc_gpn_ft_resp partial_buf;
644 struct delayed_work disc_work;
646 void (*disc_callback)(struct fc_lport *,
651 * Local port notifier and events.
653 extern struct blocking_notifier_head fc_lport_notifier_head;
654 enum fc_lport_event {
660 * struct fc_lport - Local port
661 * @host: The SCSI host associated with a local port
662 * @ema_list: Exchange manager anchor list
663 * @dns_rdata: The directory server remote port
664 * @ms_rdata: The management server remote port
665 * @ptp_rdata: Point to point remote port
666 * @scsi_priv: FCP layer internal data
667 * @disc: Discovery context
668 * @vports: Child vports if N_Port
669 * @vport: Parent vport if VN_Port
670 * @tt: Libfc function template
671 * @link_up: Link state (1 = link up, 0 = link down)
672 * @qfull: Queue state (1 queue is full, 0 queue is not full)
673 * @state: Identifies the state
674 * @boot_time: Timestamp indicating when the local port came online
675 * @host_stats: SCSI host statistics
676 * @stats: FC local port stats (TODO separate libfc LLD stats)
677 * @retry_count: Number of retries in the current state
678 * @port_id: FC Port ID
679 * @wwpn: World Wide Port Name
680 * @wwnn: World Wide Node Name
681 * @service_params: Common service parameters
682 * @e_d_tov: Error detection timeout value
683 * @r_a_tov: Resouce allocation timeout value
684 * @rnid_gen: RNID information
685 * @sg_supp: Indicates if scatter gather is supported
686 * @seq_offload: Indicates if sequence offload is supported
687 * @crc_offload: Indicates if CRC offload is supported
688 * @lro_enabled: Indicates if large receive offload is supported
689 * @does_npiv: Supports multiple vports
690 * @npiv_enabled: Switch/fabric allows NPIV
691 * @mfs: The maximum Fibre Channel payload size
692 * @max_retry_count: The maximum retry attempts
693 * @max_rport_retry_count: The maximum remote port retry attempts
694 * @rport_priv_size: Size needed by driver after struct fc_rport_priv
695 * @lro_xid: The maximum XID for LRO
696 * @lso_max: The maximum large offload send size
697 * @fcts: FC-4 type mask
698 * @lp_mutex: Mutex to protect the local port
699 * @list: Linkage on list of vport peers
700 * @retry_work: Handle to local port for delayed retry context
701 * @prov: Pointers available for use by passive FC-4 providers
702 * @lport_list: Linkage on module-wide list of local ports
706 struct Scsi_Host *host;
707 struct list_head ema_list;
708 struct fc_rport_priv *dns_rdata;
709 struct fc_rport_priv *ms_rdata;
710 struct fc_rport_priv *ptp_rdata;
714 /* Virtual port information */
715 struct list_head vports;
716 struct fc_vport *vport;
718 /* Operational Information */
719 struct libfc_function_template tt;
723 enum fc_lport_state state;
724 unsigned long boot_time;
725 struct fc_host_statistics host_stats;
726 struct fc_stats __percpu *stats;
729 /* Fabric information */
733 unsigned int service_params;
734 unsigned int e_d_tov;
735 unsigned int r_a_tov;
736 struct fc_els_rnid_gen rnid_gen;
745 u32 point_to_multipoint:1;
749 u8 max_rport_retry_count;
752 u16 link_supported_speeds;
754 unsigned int lso_max;
755 struct fc_ns_fts fcts;
758 struct mutex lp_mutex;
759 struct list_head list;
760 struct delayed_work retry_work;
761 void *prov[FC_FC4_PROV_SIZE];
762 struct list_head lport_list;
766 * struct fc4_prov - FC-4 provider registration
767 * @prli: Handler for incoming PRLI
768 * @prlo: Handler for session reset
769 * @recv: Handler for incoming request
770 * @module: Pointer to module. May be NULL.
773 int (*prli)(struct fc_rport_priv *, u32 spp_len,
774 const struct fc_els_spp *spp_in,
775 struct fc_els_spp *spp_out);
776 void (*prlo)(struct fc_rport_priv *);
777 void (*recv)(struct fc_lport *, struct fc_frame *);
778 struct module *module;
782 * Register FC-4 provider with libfc.
784 int fc_fc4_register_provider(enum fc_fh_type type, struct fc4_prov *);
785 void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *);
788 * FC_LPORT HELPER FUNCTIONS
789 *****************************/
792 * fc_lport_test_ready() - Determine if a local port is in the READY state
793 * @lport: The local port to test
795 static inline int fc_lport_test_ready(struct fc_lport *lport)
797 return lport->state == LPORT_ST_READY;
801 * fc_set_wwnn() - Set the World Wide Node Name of a local port
802 * @lport: The local port whose WWNN is to be set
803 * @wwnn: The new WWNN
805 static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
811 * fc_set_wwpn() - Set the World Wide Port Name of a local port
812 * @lport: The local port whose WWPN is to be set
813 * @wwpn: The new WWPN
815 static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwpn)
821 * fc_lport_state_enter() - Change a local port's state
822 * @lport: The local port whose state is to change
823 * @state: The new state
825 static inline void fc_lport_state_enter(struct fc_lport *lport,
826 enum fc_lport_state state)
828 if (state != lport->state)
829 lport->retry_count = 0;
830 lport->state = state;
834 * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
835 * @lport: The local port whose statistics are to be initialized
837 static inline int fc_lport_init_stats(struct fc_lport *lport)
839 lport->stats = alloc_percpu(struct fc_stats);
846 * fc_lport_free_stats() - Free memory for a local port's statistics
847 * @lport: The local port whose statistics are to be freed
849 static inline void fc_lport_free_stats(struct fc_lport *lport)
851 free_percpu(lport->stats);
855 * lport_priv() - Return the private data from a local port
856 * @lport: The local port whose private data is to be retreived
858 static inline void *lport_priv(const struct fc_lport *lport)
860 return (void *)(lport + 1);
864 * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
866 * @sht: The SCSI host template
867 * @priv_size: Size of private data
869 * Returns: libfc lport
871 static inline struct fc_lport *
872 libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
874 struct fc_lport *lport;
875 struct Scsi_Host *shost;
877 shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
880 lport = shost_priv(shost);
882 INIT_LIST_HEAD(&lport->ema_list);
883 INIT_LIST_HEAD(&lport->vports);
888 * FC_FCP HELPER FUNCTIONS
889 *****************************/
890 static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
893 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
899 *****************************/
900 int fc_lport_init(struct fc_lport *);
901 int fc_lport_destroy(struct fc_lport *);
902 int fc_fabric_logoff(struct fc_lport *);
903 int fc_fabric_login(struct fc_lport *);
904 void __fc_linkup(struct fc_lport *);
905 void fc_linkup(struct fc_lport *);
906 void __fc_linkdown(struct fc_lport *);
907 void fc_linkdown(struct fc_lport *);
908 void fc_vport_setlink(struct fc_lport *);
909 void fc_vports_linkchange(struct fc_lport *);
910 int fc_lport_config(struct fc_lport *);
911 int fc_lport_reset(struct fc_lport *);
912 void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp);
913 int fc_set_mfs(struct fc_lport *, u32 mfs);
914 struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
915 struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
916 int fc_lport_bsg_request(struct bsg_job *);
917 void fc_lport_set_local_id(struct fc_lport *, u32 port_id);
918 void fc_lport_iterate(void (*func)(struct fc_lport *, void *), void *);
922 *****************************/
923 void fc_rport_terminate_io(struct fc_rport *);
924 struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport,
926 struct fc_rport_priv *fc_rport_create(struct fc_lport *, u32);
927 void fc_rport_destroy(struct kref *kref);
928 int fc_rport_login(struct fc_rport_priv *rdata);
929 int fc_rport_logoff(struct fc_rport_priv *rdata);
930 void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp);
931 void fc_rport_flush_queue(void);
935 *****************************/
936 void fc_disc_init(struct fc_lport *);
937 void fc_disc_config(struct fc_lport *, void *);
939 static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc)
941 return container_of(disc, struct fc_lport, disc);
946 *****************************/
947 int fc_fcp_init(struct fc_lport *);
948 void fc_fcp_destroy(struct fc_lport *);
951 * SCSI INTERACTION LAYER
952 *****************************/
953 int fc_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
954 int fc_eh_abort(struct scsi_cmnd *);
955 int fc_eh_device_reset(struct scsi_cmnd *);
956 int fc_eh_host_reset(struct scsi_cmnd *);
957 int fc_slave_alloc(struct scsi_device *);
961 *****************************/
962 int fc_elsct_init(struct fc_lport *);
963 struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
966 void (*resp)(struct fc_seq *,
969 void *arg, u32 timer_msec);
970 void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
971 void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
972 void fc_fill_reply_hdr(struct fc_frame *, const struct fc_frame *,
973 enum fc_rctl, u32 parm_offset);
974 void fc_fill_hdr(struct fc_frame *, const struct fc_frame *,
975 enum fc_rctl, u32 f_ctl, u16 seq_cnt, u32 parm_offset);
979 * EXCHANGE MANAGER LAYER
980 *****************************/
981 int fc_exch_init(struct fc_lport *);
982 void fc_exch_update_stats(struct fc_lport *lport);
983 struct fc_seq *fc_exch_seq_send(struct fc_lport *lport,
985 void (*resp)(struct fc_seq *,
988 void (*destructor)(struct fc_seq *, void *),
989 void *arg, u32 timer_msec);
990 void fc_seq_els_rsp_send(struct fc_frame *, enum fc_els_cmd,
991 struct fc_seq_els_data *);
992 struct fc_seq *fc_seq_start_next(struct fc_seq *sp);
993 void fc_seq_set_resp(struct fc_seq *sp,
994 void (*resp)(struct fc_seq *, struct fc_frame *, void *),
996 struct fc_seq *fc_seq_assign(struct fc_lport *lport, struct fc_frame *fp);
997 void fc_seq_release(struct fc_seq *sp);
998 struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
999 struct fc_exch_mgr *,
1000 bool (*match)(struct fc_frame *));
1001 void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
1002 int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
1003 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
1004 u16 min_xid, u16 max_xid,
1005 bool (*match)(struct fc_frame *));
1006 void fc_exch_mgr_free(struct fc_lport *);
1007 void fc_exch_recv(struct fc_lport *, struct fc_frame *);
1008 void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
1009 int fc_seq_send(struct fc_lport *lport, struct fc_seq *sp, struct fc_frame *fp);
1010 int fc_seq_exch_abort(const struct fc_seq *, unsigned int timer_msec);
1011 void fc_exch_done(struct fc_seq *sp);
1014 * Functions for fc_functions_template
1016 void fc_get_host_speed(struct Scsi_Host *);
1017 void fc_get_host_port_state(struct Scsi_Host *);
1018 void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
1019 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1021 #endif /* _LIBFC_H_ */