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>
29 #include <scsi/scsi_bsg_fc.h>
31 #include <scsi/fc/fc_fcp.h>
32 #include <scsi/fc/fc_ns.h>
33 #include <scsi/fc/fc_ms.h>
34 #include <scsi/fc/fc_els.h>
35 #include <scsi/fc/fc_gs.h>
37 #include <scsi/fc_frame.h>
39 #define FC_FC4_PROV_SIZE (FC_TYPE_FCP + 1) /* size of tables */
44 #define FC_NO_ERR 0 /* no error */
45 #define FC_EX_TIMEOUT 1 /* Exchange timeout */
46 #define FC_EX_CLOSED 2 /* Exchange closed */
47 #define FC_EX_ALLOC_ERR 3 /* Exchange allocation failed */
48 #define FC_EX_XMIT_ERR 4 /* Exchange transmit failed */
49 #define FC_EX_ELS_RJT 5 /* ELS rejected */
50 #define FC_EX_INV_LOGIN 6 /* Login not completed */
51 #define FC_EX_SEQ_ERR 6 /* Exchange sequence error */
54 * enum fc_lport_state - Local port states
55 * @LPORT_ST_DISABLED: Disabled
56 * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent
57 * @LPORT_ST_DNS: Waiting for name server remote port to become ready
58 * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent
59 * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent
60 * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent
61 * @LPORT_ST_FDMI: Waiting for mgmt server rport to become ready
63 * @LPORT_ST_SCR: State Change Register (SCR) sent
64 * @LPORT_ST_READY: Ready for use
65 * @LPORT_ST_LOGO: Local port logout (LOGO) sent
66 * @LPORT_ST_RESET: Local port reset
69 LPORT_ST_DISABLED = 0,
95 * enum fc_rport_state - Remote port states
96 * @RPORT_ST_INIT: Initialized
97 * @RPORT_ST_FLOGI: Waiting for FLOGI completion for point-to-multipoint
98 * @RPORT_ST_PLOGI_WAIT: Waiting for peer to login for point-to-multipoint
99 * @RPORT_ST_PLOGI: Waiting for PLOGI completion
100 * @RPORT_ST_PRLI: Waiting for PRLI completion
101 * @RPORT_ST_RTV: Waiting for RTV completion
102 * @RPORT_ST_READY: Ready for use
103 * @RPORT_ST_ADISC: Discover Address sent
104 * @RPORT_ST_DELETE: Remote port being deleted
106 enum fc_rport_state {
119 * struct fc_disc_port - temporary discovery port to hold rport identifiers
120 * @lp: Fibre Channel host port instance
121 * @peers: Node for list management during discovery and RSCN processing
122 * @rport_work: Work struct for starting the rport state machine
123 * @port_id: Port ID of the discovered port
125 struct fc_disc_port {
127 struct list_head peers;
128 struct work_struct rport_work;
133 * enum fc_rport_event - Remote port events
134 * @RPORT_EV_NONE: No event
135 * @RPORT_EV_READY: Remote port is ready for use
136 * @RPORT_EV_FAILED: State machine failed, remote port is not ready
137 * @RPORT_EV_STOP: Remote port has been stopped
138 * @RPORT_EV_LOGO: Remote port logout (LOGO) sent
140 enum fc_rport_event {
148 struct fc_rport_priv;
151 * struct fc_rport_operations - Operations for a remote port
152 * @event_callback: Function to be called for remote port events
154 struct fc_rport_operations {
155 void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
156 enum fc_rport_event);
160 * struct fc_rport_libfc_priv - libfc internal information about a remote port
161 * @local_port: The associated local port
162 * @rp_state: Indicates READY for I/O or DELETE when blocked
163 * @flags: REC and RETRY supported flags
164 * @e_d_tov: Error detect timeout value (in msec)
165 * @r_a_tov: Resource allocation timeout value (in msec)
167 struct fc_rport_libfc_priv {
168 struct fc_lport *local_port;
169 enum fc_rport_state rp_state;
171 #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
172 #define FC_RP_FLAGS_RETRY (1 << 1)
173 #define FC_RP_STARTED (1 << 2)
174 #define FC_RP_FLAGS_CONF_REQ (1 << 3)
175 unsigned int e_d_tov;
176 unsigned int r_a_tov;
180 * struct fc_rport_priv - libfc remote port and discovery info
181 * @local_port: The associated local port
182 * @rport: The FC transport remote port
183 * @kref: Reference counter
184 * @rp_state: Enumeration that tracks progress of PLOGI, PRLI,
186 * @ids: The remote port identifiers and roles
187 * @flags: STARTED, REC and RETRY_SUPPORTED flags
188 * @max_seq: Maximum number of concurrent sequences
189 * @disc_id: The discovery identifier
190 * @maxframe_size: The maximum frame size
191 * @retries: The retry count for the current state
192 * @major_retries: The retry count for the entire PLOGI/PRLI state machine
193 * @e_d_tov: Error detect timeout value (in msec)
194 * @r_a_tov: Resource allocation timeout value (in msec)
195 * @rp_mutex: The mutex that protects the remote port
196 * @retry_work: Handle for retries
197 * @event_callback: Callback when READY, FAILED or LOGO states complete
198 * @prli_count: Count of open PRLI sessions in providers
199 * @rcu: Structure used for freeing in an RCU-safe manner
201 struct fc_rport_priv {
202 struct fc_lport *local_port;
203 struct fc_rport *rport;
205 enum fc_rport_state rp_state;
206 struct fc_rport_identifiers ids;
211 unsigned int retries;
212 unsigned int major_retries;
213 unsigned int e_d_tov;
214 unsigned int r_a_tov;
215 struct mutex rp_mutex;
216 struct delayed_work retry_work;
217 enum fc_rport_event event;
218 struct fc_rport_operations *ops;
219 struct list_head peers;
220 struct work_struct event_work;
221 u32 supported_classes;
226 void (*lld_event_callback)(struct fc_lport *,
227 struct fc_rport_priv *,
228 enum fc_rport_event);
232 * struct fc_stats - fc stats structure
233 * @SecondsSinceLastReset: Seconds since the last reset
234 * @TxFrames: Number of transmitted frames
235 * @TxWords: Number of transmitted words
236 * @RxFrames: Number of received frames
237 * @RxWords: Number of received words
238 * @ErrorFrames: Number of received error frames
239 * @DumpedFrames: Number of dumped frames
240 * @FcpPktAllocFails: Number of fcp packet allocation failures
241 * @FcpPktAborts: Number of fcp packet aborts
242 * @FcpFrameAllocFails: Number of fcp frame allocation failures
243 * @LinkFailureCount: Number of link failures
244 * @LossOfSignalCount: Number for signal losses
245 * @InvalidTxWordCount: Number of invalid transmitted words
246 * @InvalidCRCCount: Number of invalid CRCs
247 * @InputRequests: Number of input requests
248 * @OutputRequests: Number of output requests
249 * @ControlRequests: Number of control requests
250 * @InputBytes: Number of received bytes
251 * @OutputBytes: Number of transmitted bytes
252 * @VLinkFailureCount: Number of virtual link failures
253 * @MissDiscAdvCount: Number of missing FIP discovery advertisement
256 u64 SecondsSinceLastReset;
263 u64 FcpPktAllocFails;
265 u64 FcpFrameAllocFails;
266 u64 LinkFailureCount;
267 u64 LossOfSignalCount;
268 u64 InvalidTxWordCount;
275 u64 VLinkFailureCount;
276 u64 MissDiscAdvCount;
280 * struct fc_seq_els_data - ELS data used for passing ELS specific responses
281 * @reason: The reason for rejection
282 * @explan: The explanation of the rejection
284 * Mainly used by the exchange manager layer.
286 struct fc_seq_els_data {
287 enum fc_els_rjt_reason reason;
288 enum fc_els_rjt_explan explan;
292 * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request)
293 * @lp: The associated local port
294 * @state: The state of the I/O
295 * @ref_cnt: Reference count
296 * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the
297 * host_lock if both are to be held at the same time)
298 * @cmd: The SCSI command (set and clear with the host_lock held)
299 * @list: Tracks queued commands (accessed with the host_lock held)
300 * @timer: The command timer
301 * @tm_done: Completion indicator
302 * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies)
303 * @data_len: The length of the data
304 * @cdb_cmd: The CDB command
305 * @xfer_len: The transfer length
306 * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange
307 * will be set here if DDP was setup)
308 * @xfer_contig_end: The offset into the buffer if the buffer is contiguous
310 * @max_payload: The maximum payload size (in bytes)
311 * @io_status: SCSI result (upper 24 bits)
312 * @cdb_status: CDB status
313 * @status_code: FCP I/O status
314 * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun)
315 * @req_flags: Request flags (bit 0: read bit:1 write)
316 * @scsi_resid: SCSI residule length
317 * @rport: The remote port that the SCSI command is targeted at
318 * @seq_ptr: The sequence that will carry the SCSI command
319 * @recov_retry: Number of recovery retries
320 * @recov_seq: The sequence for REC or SRR
323 spinlock_t scsi_pkt_lock;
326 /* SCSI command and data transfer information */
329 /* SCSI I/O related information */
330 struct scsi_cmnd *cmd;
331 struct list_head list;
333 /* Housekeeping information */
337 /* SCSI/FCP return status */
345 /* Transport related veriables */
347 struct fcp_cmnd cdb_cmd;
352 /* Associated structures */
353 struct fc_rport *rport;
354 struct fc_seq *seq_ptr;
356 /* Timeout/error related information */
357 struct timer_list timer;
361 struct fc_seq *recov_seq;
362 struct completion tm_done;
363 } ____cacheline_aligned_in_smp;
366 * Structure and function definitions for managing Fibre Channel Exchanges
369 * fc_exch holds state for one exchange and links to its active sequence.
371 * fc_seq holds the state for an individual sequence.
375 struct fc_exch_mgr_anchor;
376 extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
379 * struct fc_seq - FC sequence
380 * @id: The sequence ID
381 * @ssb_stat: Status flags for the sequence status block (SSB)
382 * @cnt: Number of frames sent so far
383 * @rec_data: FC-4 value for REC
392 #define FC_EX_DONE (1 << 0) /* ep is completed */
393 #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
394 #define FC_EX_QUARANTINE (1 << 2) /* exch is quarantined */
397 * struct fc_exch - Fibre Channel Exchange
398 * @em: Exchange manager
399 * @pool: Exchange pool
400 * @state: The exchange's state
401 * @xid: The exchange ID
402 * @ex_list: Handle used by the EM to track free exchanges
403 * @ex_lock: Lock that protects the exchange
404 * @ex_refcnt: Reference count
405 * @timeout_work: Handle for timeout handler
406 * @lp: The local port that this exchange is on
407 * @oxid: Originator's exchange ID
408 * @rxid: Responder's exchange ID
409 * @oid: Originator's FCID
411 * @did: Destination FCID
412 * @esb_stat: ESB exchange status
413 * @r_a_tov: Resouce allocation time out value (in msecs)
414 * @seq_id: The next sequence ID to use
415 * @encaps: encapsulation information for lower-level driver
416 * @f_ctl: F_CTL flags for the sequence
417 * @fh_type: The frame type
418 * @class: The class of service
419 * @seq: The sequence in use on this exchange
420 * @resp_active: Number of tasks that are concurrently executing @resp().
421 * @resp_task: If @resp_active > 0, either the task executing @resp(), the
422 * task that has been interrupted to execute the soft-IRQ
423 * executing @resp() or NULL if more than one task is executing
424 * @resp concurrently.
425 * @resp_wq: Waitqueue for the tasks waiting on @resp_active.
426 * @resp: Callback for responses on this exchange
427 * @destructor: Called when destroying the exchange
428 * @arg: Passed as a void pointer to the resp() callback
430 * Locking notes: The ex_lock protects following items:
431 * state, esb_stat, f_ctl, seq.ssb_stat
433 * sequence allocation
439 struct fc_exch_mgr *em;
440 struct fc_exch_pool *pool;
441 struct list_head ex_list;
458 struct task_struct *resp_task;
459 wait_queue_head_t resp_wq;
460 void (*resp)(struct fc_seq *, struct fc_frame *, void *);
462 void (*destructor)(struct fc_seq *, void *);
463 struct delayed_work timeout_work;
464 } ____cacheline_aligned_in_smp;
465 #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
468 struct libfc_function_template {
470 * Interface to send a FC frame
474 int (*frame_send)(struct fc_lport *, struct fc_frame *);
477 * Interface to send ELS/CT frames
481 struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did,
482 struct fc_frame *, unsigned int op,
483 void (*resp)(struct fc_seq *,
484 struct fc_frame *, void *arg),
485 void *arg, u32 timer_msec);
488 * Sets up the DDP context for a given exchange id on the given
489 * scatterlist if LLD supports DDP for large receive.
493 int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *,
496 * Completes the DDP transfer and returns the length of data DDPed
497 * for the given exchange id.
501 int (*ddp_done)(struct fc_lport *, u16);
503 * Sets up the DDP context for a given exchange id on the given
504 * scatterlist if LLD supports DDP for target.
508 int (*ddp_target)(struct fc_lport *, u16, struct scatterlist *,
511 * Allow LLD to fill its own Link Error Status Block
515 void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb);
518 * Assign a sequence for an incoming request frame.
522 struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *);
525 * Release the reference on the sequence returned by seq_assign().
529 void (*seq_release)(struct fc_seq *);
532 * Reset an exchange manager, completing all sequences and exchanges.
533 * If s_id is non-zero, reset only exchanges originating from that FID.
534 * If d_id is non-zero, reset only exchanges sending to that FID.
538 void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
541 * Set the local port FC_ID.
543 * This may be provided by the LLD to allow it to be
544 * notified when the local port is assigned a FC-ID.
546 * The frame, if non-NULL, is the incoming frame with the
547 * FLOGI LS_ACC or FLOGI, and may contain the granted MAC
548 * address for the LLD. The frame pointer may be NULL if
549 * no MAC is associated with this assignment (LOGO or PLOGI).
551 * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid.
553 * Note: this is called with the local port mutex held.
557 void (*lport_set_port_id)(struct fc_lport *, u32 port_id,
561 * Callback routine after the remote port is logged in
565 void (*rport_event_callback)(struct fc_lport *,
566 struct fc_rport_priv *,
567 enum fc_rport_event);
570 * Send a fcp cmd from fsp pkt.
571 * Called with the SCSI host lock unlocked and irqs disabled.
573 * The resp handler is called when FCP_RSP received.
577 int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
578 void (*resp)(struct fc_seq *, struct fc_frame *,
582 * Cleanup the FCP layer, used during link down and reset
586 void (*fcp_cleanup)(struct fc_lport *);
589 * Abort all I/O on a local port
593 void (*fcp_abort_io)(struct fc_lport *);
596 * Receive a request for the discovery layer.
600 void (*disc_recv_req)(struct fc_lport *, struct fc_frame *);
603 * Start discovery for a local port.
607 void (*disc_start)(void (*disc_callback)(struct fc_lport *,
612 * Stop discovery for a given lport. This will remove
613 * all discovered rports
617 void (*disc_stop) (struct fc_lport *);
620 * Stop discovery for a given lport. This will block
621 * until all discovered rports are deleted from the
626 void (*disc_stop_final) (struct fc_lport *);
630 * struct fc_disc - Discovery context
631 * @retry_count: Number of retries
632 * @pending: 1 if discovery is pending, 0 if not
633 * @requested: 1 if discovery has been requested, 0 if not
634 * @seq_count: Number of sequences used for discovery
635 * @buf_len: Length of the discovery buffer
636 * @disc_id: Discovery ID
637 * @rports: List of discovered remote ports
638 * @priv: Private pointer for use by discovery code
639 * @disc_mutex: Mutex that protects the discovery context
640 * @partial_buf: Partial name buffer (if names are returned
641 * in multiple frames)
642 * @disc_work: handle for delayed work context
643 * @disc_callback: Callback routine called when discovery completes
646 unsigned char retry_count;
647 unsigned char pending;
648 unsigned char requested;
649 unsigned short seq_count;
650 unsigned char buf_len;
653 struct list_head rports;
655 struct mutex disc_mutex;
656 struct fc_gpn_ft_resp partial_buf;
657 struct delayed_work disc_work;
659 void (*disc_callback)(struct fc_lport *,
664 * Local port notifier and events.
666 extern struct blocking_notifier_head fc_lport_notifier_head;
667 enum fc_lport_event {
673 * struct fc_lport - Local port
674 * @host: The SCSI host associated with a local port
675 * @ema_list: Exchange manager anchor list
676 * @dns_rdata: The directory server remote port
677 * @ms_rdata: The management server remote port
678 * @ptp_rdata: Point to point remote port
679 * @scsi_priv: FCP layer internal data
680 * @disc: Discovery context
681 * @vports: Child vports if N_Port
682 * @vport: Parent vport if VN_Port
683 * @tt: Libfc function template
684 * @link_up: Link state (1 = link up, 0 = link down)
685 * @qfull: Queue state (1 queue is full, 0 queue is not full)
686 * @state: Identifies the state
687 * @boot_time: Timestamp indicating when the local port came online
688 * @host_stats: SCSI host statistics
689 * @stats: FC local port stats (TODO separate libfc LLD stats)
690 * @retry_count: Number of retries in the current state
691 * @port_id: FC Port ID
692 * @wwpn: World Wide Port Name
693 * @wwnn: World Wide Node Name
694 * @service_params: Common service parameters
695 * @e_d_tov: Error detection timeout value
696 * @r_a_tov: Resouce allocation timeout value
697 * @rnid_gen: RNID information
698 * @sg_supp: Indicates if scatter gather is supported
699 * @seq_offload: Indicates if sequence offload is supported
700 * @crc_offload: Indicates if CRC offload is supported
701 * @lro_enabled: Indicates if large receive offload is supported
702 * @does_npiv: Supports multiple vports
703 * @npiv_enabled: Switch/fabric allows NPIV
704 * @mfs: The maximum Fibre Channel payload size
705 * @max_retry_count: The maximum retry attempts
706 * @max_rport_retry_count: The maximum remote port retry attempts
707 * @rport_priv_size: Size needed by driver after struct fc_rport_priv
708 * @lro_xid: The maximum XID for LRO
709 * @lso_max: The maximum large offload send size
710 * @fcts: FC-4 type mask
711 * @lp_mutex: Mutex to protect the local port
712 * @list: Linkage on list of vport peers
713 * @retry_work: Handle to local port for delayed retry context
714 * @prov: Pointers available for use by passive FC-4 providers
715 * @lport_list: Linkage on module-wide list of local ports
719 struct Scsi_Host *host;
720 struct list_head ema_list;
721 struct fc_rport_priv *dns_rdata;
722 struct fc_rport_priv *ms_rdata;
723 struct fc_rport_priv *ptp_rdata;
727 /* Virtual port information */
728 struct list_head vports;
729 struct fc_vport *vport;
731 /* Operational Information */
732 struct libfc_function_template tt;
736 enum fc_lport_state state;
737 unsigned long boot_time;
738 struct fc_host_statistics host_stats;
739 struct fc_stats __percpu *stats;
742 /* Fabric information */
746 unsigned int service_params;
747 unsigned int e_d_tov;
748 unsigned int r_a_tov;
749 struct fc_els_rnid_gen rnid_gen;
758 u32 point_to_multipoint:1;
762 u8 max_rport_retry_count;
765 u16 link_supported_speeds;
767 unsigned int lso_max;
768 struct fc_ns_fts fcts;
771 struct mutex lp_mutex;
772 struct list_head list;
773 struct delayed_work retry_work;
774 void *prov[FC_FC4_PROV_SIZE];
775 struct list_head lport_list;
779 * struct fc4_prov - FC-4 provider registration
780 * @prli: Handler for incoming PRLI
781 * @prlo: Handler for session reset
782 * @recv: Handler for incoming request
783 * @module: Pointer to module. May be NULL.
786 int (*prli)(struct fc_rport_priv *, u32 spp_len,
787 const struct fc_els_spp *spp_in,
788 struct fc_els_spp *spp_out);
789 void (*prlo)(struct fc_rport_priv *);
790 void (*recv)(struct fc_lport *, struct fc_frame *);
791 struct module *module;
795 * Register FC-4 provider with libfc.
797 int fc_fc4_register_provider(enum fc_fh_type type, struct fc4_prov *);
798 void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *);
801 * FC_LPORT HELPER FUNCTIONS
802 *****************************/
805 * fc_lport_test_ready() - Determine if a local port is in the READY state
806 * @lport: The local port to test
808 static inline int fc_lport_test_ready(struct fc_lport *lport)
810 return lport->state == LPORT_ST_READY;
814 * fc_set_wwnn() - Set the World Wide Node Name of a local port
815 * @lport: The local port whose WWNN is to be set
816 * @wwnn: The new WWNN
818 static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
824 * fc_set_wwpn() - Set the World Wide Port Name of a local port
825 * @lport: The local port whose WWPN is to be set
826 * @wwnn: The new WWPN
828 static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn)
834 * fc_lport_state_enter() - Change a local port's state
835 * @lport: The local port whose state is to change
836 * @state: The new state
838 static inline void fc_lport_state_enter(struct fc_lport *lport,
839 enum fc_lport_state state)
841 if (state != lport->state)
842 lport->retry_count = 0;
843 lport->state = state;
847 * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
848 * @lport: The local port whose statistics are to be initialized
850 static inline int fc_lport_init_stats(struct fc_lport *lport)
852 lport->stats = alloc_percpu(struct fc_stats);
859 * fc_lport_free_stats() - Free memory for a local port's statistics
860 * @lport: The local port whose statistics are to be freed
862 static inline void fc_lport_free_stats(struct fc_lport *lport)
864 free_percpu(lport->stats);
868 * lport_priv() - Return the private data from a local port
869 * @lport: The local port whose private data is to be retreived
871 static inline void *lport_priv(const struct fc_lport *lport)
873 return (void *)(lport + 1);
877 * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
879 * @sht: The SCSI host template
880 * @priv_size: Size of private data
882 * Returns: libfc lport
884 static inline struct fc_lport *
885 libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
887 struct fc_lport *lport;
888 struct Scsi_Host *shost;
890 shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
893 lport = shost_priv(shost);
895 INIT_LIST_HEAD(&lport->ema_list);
896 INIT_LIST_HEAD(&lport->vports);
901 * FC_FCP HELPER FUNCTIONS
902 *****************************/
903 static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
906 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
912 *****************************/
913 int fc_lport_init(struct fc_lport *);
914 int fc_lport_destroy(struct fc_lport *);
915 int fc_fabric_logoff(struct fc_lport *);
916 int fc_fabric_login(struct fc_lport *);
917 void __fc_linkup(struct fc_lport *);
918 void fc_linkup(struct fc_lport *);
919 void __fc_linkdown(struct fc_lport *);
920 void fc_linkdown(struct fc_lport *);
921 void fc_vport_setlink(struct fc_lport *);
922 void fc_vports_linkchange(struct fc_lport *);
923 int fc_lport_config(struct fc_lport *);
924 int fc_lport_reset(struct fc_lport *);
925 void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp);
926 int fc_set_mfs(struct fc_lport *, u32 mfs);
927 struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
928 struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
929 int fc_lport_bsg_request(struct fc_bsg_job *);
930 void fc_lport_set_local_id(struct fc_lport *, u32 port_id);
931 void fc_lport_iterate(void (*func)(struct fc_lport *, void *), void *);
935 *****************************/
936 void fc_rport_terminate_io(struct fc_rport *);
937 struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport,
939 struct fc_rport_priv *fc_rport_create(struct fc_lport *, u32);
940 void fc_rport_destroy(struct kref *kref);
941 int fc_rport_login(struct fc_rport_priv *rdata);
942 int fc_rport_logoff(struct fc_rport_priv *rdata);
943 void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp);
944 void fc_rport_flush_queue(void);
948 *****************************/
949 void fc_disc_init(struct fc_lport *);
950 void fc_disc_config(struct fc_lport *, void *);
952 static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc)
954 return container_of(disc, struct fc_lport, disc);
959 *****************************/
960 int fc_fcp_init(struct fc_lport *);
961 void fc_fcp_destroy(struct fc_lport *);
964 * SCSI INTERACTION LAYER
965 *****************************/
966 int fc_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
967 int fc_eh_abort(struct scsi_cmnd *);
968 int fc_eh_device_reset(struct scsi_cmnd *);
969 int fc_eh_host_reset(struct scsi_cmnd *);
970 int fc_slave_alloc(struct scsi_device *);
974 *****************************/
975 int fc_elsct_init(struct fc_lport *);
976 struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
979 void (*resp)(struct fc_seq *,
982 void *arg, u32 timer_msec);
983 void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
984 void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
985 void fc_fill_reply_hdr(struct fc_frame *, const struct fc_frame *,
986 enum fc_rctl, u32 parm_offset);
987 void fc_fill_hdr(struct fc_frame *, const struct fc_frame *,
988 enum fc_rctl, u32 f_ctl, u16 seq_cnt, u32 parm_offset);
992 * EXCHANGE MANAGER LAYER
993 *****************************/
994 int fc_exch_init(struct fc_lport *);
995 void fc_exch_update_stats(struct fc_lport *lport);
996 struct fc_seq *fc_exch_seq_send(struct fc_lport *lport,
998 void (*resp)(struct fc_seq *,
1001 void (*destructor)(struct fc_seq *, void *),
1002 void *arg, u32 timer_msec);
1003 void fc_seq_els_rsp_send(struct fc_frame *, enum fc_els_cmd,
1004 struct fc_seq_els_data *);
1005 struct fc_seq *fc_seq_start_next(struct fc_seq *sp);
1006 void fc_seq_set_resp(struct fc_seq *sp,
1007 void (*resp)(struct fc_seq *, struct fc_frame *, void *),
1009 struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
1010 struct fc_exch_mgr *,
1011 bool (*match)(struct fc_frame *));
1012 void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
1013 int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
1014 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
1015 u16 min_xid, u16 max_xid,
1016 bool (*match)(struct fc_frame *));
1017 void fc_exch_mgr_free(struct fc_lport *);
1018 void fc_exch_recv(struct fc_lport *, struct fc_frame *);
1019 void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
1020 int fc_seq_send(struct fc_lport *lport, struct fc_seq *sp, struct fc_frame *fp);
1021 int fc_seq_exch_abort(const struct fc_seq *, unsigned int timer_msec);
1022 void fc_exch_done(struct fc_seq *sp);
1025 * Functions for fc_functions_template
1027 void fc_get_host_speed(struct Scsi_Host *);
1028 void fc_get_host_port_state(struct Scsi_Host *);
1029 void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
1030 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1032 #endif /* _LIBFC_H_ */