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_els.h>
34 #include <scsi/fc/fc_gs.h>
36 #include <scsi/fc_frame.h>
38 #define FC_FC4_PROV_SIZE (FC_TYPE_FCP + 1) /* size of tables */
43 #define FC_NO_ERR 0 /* no error */
44 #define FC_EX_TIMEOUT 1 /* Exchange timeout */
45 #define FC_EX_CLOSED 2 /* Exchange closed */
48 * enum fc_lport_state - Local port states
49 * @LPORT_ST_DISABLED: Disabled
50 * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent
51 * @LPORT_ST_DNS: Waiting for name server remote port to become ready
52 * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent
53 * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent
54 * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent
55 * @LPORT_ST_SCR: State Change Register (SCR) sent
56 * @LPORT_ST_READY: Ready for use
57 * @LPORT_ST_LOGO: Local port logout (LOGO) sent
58 * @LPORT_ST_RESET: Local port reset
61 LPORT_ST_DISABLED = 0,
82 * enum fc_rport_state - Remote port states
83 * @RPORT_ST_INIT: Initialized
84 * @RPORT_ST_FLOGI: Waiting for FLOGI completion for point-to-multipoint
85 * @RPORT_ST_PLOGI_WAIT: Waiting for peer to login for point-to-multipoint
86 * @RPORT_ST_PLOGI: Waiting for PLOGI completion
87 * @RPORT_ST_PRLI: Waiting for PRLI completion
88 * @RPORT_ST_RTV: Waiting for RTV completion
89 * @RPORT_ST_READY: Ready for use
90 * @RPORT_ST_ADISC: Discover Address sent
91 * @RPORT_ST_DELETE: Remote port being deleted
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 * @rport_work: Work struct for starting the rport state machine
110 * @port_id: Port ID of the discovered port
112 struct fc_disc_port {
114 struct list_head peers;
115 struct work_struct rport_work;
120 * enum fc_rport_event - Remote port events
121 * @RPORT_EV_NONE: No event
122 * @RPORT_EV_READY: Remote port is ready for use
123 * @RPORT_EV_FAILED: State machine failed, remote port is not ready
124 * @RPORT_EV_STOP: Remote port has been stopped
125 * @RPORT_EV_LOGO: Remote port logout (LOGO) sent
127 enum fc_rport_event {
135 struct fc_rport_priv;
138 * struct fc_rport_operations - Operations for a remote port
139 * @event_callback: Function to be called for remote port events
141 struct fc_rport_operations {
142 void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
143 enum fc_rport_event);
147 * struct fc_rport_libfc_priv - libfc internal information about a remote port
148 * @local_port: The associated local port
149 * @rp_state: Indicates READY for I/O or DELETE when blocked
150 * @flags: REC and RETRY supported flags
151 * @e_d_tov: Error detect timeout value (in msec)
152 * @r_a_tov: Resource allocation timeout value (in msec)
154 struct fc_rport_libfc_priv {
155 struct fc_lport *local_port;
156 enum fc_rport_state rp_state;
158 #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
159 #define FC_RP_FLAGS_RETRY (1 << 1)
160 #define FC_RP_STARTED (1 << 2)
161 #define FC_RP_FLAGS_CONF_REQ (1 << 3)
162 unsigned int e_d_tov;
163 unsigned int r_a_tov;
167 * struct fc_rport_priv - libfc remote port and discovery info
168 * @local_port: The associated local port
169 * @rport: The FC transport remote port
170 * @kref: Reference counter
171 * @rp_state: Enumeration that tracks progress of PLOGI, PRLI,
173 * @ids: The remote port identifiers and roles
174 * @flags: STARTED, REC and RETRY_SUPPORTED flags
175 * @max_seq: Maximum number of concurrent sequences
176 * @disc_id: The discovery identifier
177 * @maxframe_size: The maximum frame size
178 * @retries: The retry count for the current state
179 * @major_retries: The retry count for the entire PLOGI/PRLI state machine
180 * @e_d_tov: Error detect timeout value (in msec)
181 * @r_a_tov: Resource allocation timeout value (in msec)
182 * @rp_mutex: The mutex that protects the remote port
183 * @retry_work: Handle for retries
184 * @event_callback: Callback when READY, FAILED or LOGO states complete
185 * @prli_count: Count of open PRLI sessions in providers
186 * @rcu: Structure used for freeing in an RCU-safe manner
188 struct fc_rport_priv {
189 struct fc_lport *local_port;
190 struct fc_rport *rport;
192 enum fc_rport_state rp_state;
193 struct fc_rport_identifiers ids;
198 unsigned int retries;
199 unsigned int major_retries;
200 unsigned int e_d_tov;
201 unsigned int r_a_tov;
202 struct mutex rp_mutex;
203 struct delayed_work retry_work;
204 enum fc_rport_event event;
205 struct fc_rport_operations *ops;
206 struct list_head peers;
207 struct work_struct event_work;
208 u32 supported_classes;
213 void (*lld_event_callback)(struct fc_lport *,
214 struct fc_rport_priv *,
215 enum fc_rport_event);
219 * struct fcoe_dev_stats - fcoe stats structure
220 * @SecondsSinceLastReset: Seconds since the last reset
221 * @TxFrames: Number of transmitted frames
222 * @TxWords: Number of transmitted words
223 * @RxFrames: Number of received frames
224 * @RxWords: Number of received words
225 * @ErrorFrames: Number of received error frames
226 * @DumpedFrames: Number of dumped frames
227 * @LinkFailureCount: Number of link failures
228 * @LossOfSignalCount: Number for signal losses
229 * @InvalidTxWordCount: Number of invalid transmitted words
230 * @InvalidCRCCount: Number of invalid CRCs
231 * @InputRequests: Number of input requests
232 * @OutputRequests: Number of output requests
233 * @ControlRequests: Number of control requests
234 * @InputBytes: Number of received bytes
235 * @OutputBytes: Number of transmitted bytes
236 * @VLinkFailureCount: Number of virtual link failures
237 * @MissDiscAdvCount: Number of missing FIP discovery advertisement
239 struct fcoe_dev_stats {
240 u64 SecondsSinceLastReset;
247 u64 LinkFailureCount;
248 u64 LossOfSignalCount;
249 u64 InvalidTxWordCount;
256 u64 VLinkFailureCount;
257 u64 MissDiscAdvCount;
261 * struct fc_seq_els_data - ELS data used for passing ELS specific responses
262 * @reason: The reason for rejection
263 * @explan: The explanation of the rejection
265 * Mainly used by the exchange manager layer.
267 struct fc_seq_els_data {
268 enum fc_els_rjt_reason reason;
269 enum fc_els_rjt_explan explan;
273 * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request)
274 * @lp: The associated local port
275 * @state: The state of the I/O
276 * @ref_cnt: Reference count
277 * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the
278 * host_lock if both are to be held at the same time)
279 * @cmd: The SCSI command (set and clear with the host_lock held)
280 * @list: Tracks queued commands (accessed with the host_lock held)
281 * @timer: The command timer
282 * @tm_done: Completion indicator
283 * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies)
284 * @data_len: The length of the data
285 * @cdb_cmd: The CDB command
286 * @xfer_len: The transfer length
287 * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange
288 * will be set here if DDP was setup)
289 * @xfer_contig_end: The offset into the buffer if the buffer is contiguous
291 * @max_payload: The maximum payload size (in bytes)
292 * @io_status: SCSI result (upper 24 bits)
293 * @cdb_status: CDB status
294 * @status_code: FCP I/O status
295 * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun)
296 * @req_flags: Request flags (bit 0: read bit:1 write)
297 * @scsi_resid: SCSI residule length
298 * @rport: The remote port that the SCSI command is targeted at
299 * @seq_ptr: The sequence that will carry the SCSI command
300 * @recov_retry: Number of recovery retries
301 * @recov_seq: The sequence for REC or SRR
304 spinlock_t scsi_pkt_lock;
307 /* SCSI command and data transfer information */
310 /* SCSI I/O related information */
311 struct scsi_cmnd *cmd;
312 struct list_head list;
314 /* Housekeeping information */
318 /* SCSI/FCP return status */
326 /* Transport related veriables */
328 struct fcp_cmnd cdb_cmd;
333 /* Associated structures */
334 struct fc_rport *rport;
335 struct fc_seq *seq_ptr;
337 /* Timeout/error related information */
338 struct timer_list timer;
341 struct fc_seq *recov_seq;
342 struct completion tm_done;
343 } ____cacheline_aligned_in_smp;
346 * Structure and function definitions for managing Fibre Channel Exchanges
349 * fc_exch holds state for one exchange and links to its active sequence.
351 * fc_seq holds the state for an individual sequence.
355 struct fc_exch_mgr_anchor;
356 extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
359 * struct fc_seq - FC sequence
360 * @id: The sequence ID
361 * @ssb_stat: Status flags for the sequence status block (SSB)
362 * @cnt: Number of frames sent so far
363 * @rec_data: FC-4 value for REC
372 #define FC_EX_DONE (1 << 0) /* ep is completed */
373 #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
376 * struct fc_exch - Fibre Channel Exchange
377 * @em: Exchange manager
378 * @pool: Exchange pool
379 * @state: The exchange's state
380 * @xid: The exchange ID
381 * @ex_list: Handle used by the EM to track free exchanges
382 * @ex_lock: Lock that protects the exchange
383 * @ex_refcnt: Reference count
384 * @timeout_work: Handle for timeout handler
385 * @lp: The local port that this exchange is on
386 * @oxid: Originator's exchange ID
387 * @rxid: Responder's exchange ID
388 * @oid: Originator's FCID
390 * @did: Destination FCID
391 * @esb_stat: ESB exchange status
392 * @r_a_tov: Resouce allocation time out value (in msecs)
393 * @seq_id: The next sequence ID to use
394 * @encaps: encapsulation information for lower-level driver
395 * @f_ctl: F_CTL flags for the sequence
396 * @fh_type: The frame type
397 * @class: The class of service
398 * @seq: The sequence in use on this exchange
399 * @resp: Callback for responses on this exchange
400 * @destructor: Called when destroying the exchange
401 * @arg: Passed as a void pointer to the resp() callback
403 * Locking notes: The ex_lock protects following items:
404 * state, esb_stat, f_ctl, seq.ssb_stat
406 * sequence allocation
412 struct fc_exch_mgr *em;
413 struct fc_exch_pool *pool;
414 struct list_head ex_list;
430 void (*resp)(struct fc_seq *, struct fc_frame *, void *);
432 void (*destructor)(struct fc_seq *, void *);
433 struct delayed_work timeout_work;
434 } ____cacheline_aligned_in_smp;
435 #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
438 struct libfc_function_template {
440 * Interface to send a FC frame
444 int (*frame_send)(struct fc_lport *, struct fc_frame *);
447 * Interface to send ELS/CT frames
451 struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did,
452 struct fc_frame *, unsigned int op,
453 void (*resp)(struct fc_seq *,
454 struct fc_frame *, void *arg),
455 void *arg, u32 timer_msec);
458 * Send the FC frame payload using a new exchange and sequence.
460 * The exchange response handler is set in this routine to resp()
461 * function pointer. It can be called in two scenarios: if a timeout
462 * occurs or if a response frame is received for the exchange. The
463 * fc_frame pointer in response handler will also indicate timeout
464 * as error using IS_ERR related macros.
466 * The exchange destructor handler is also set in this routine.
467 * The destructor handler is invoked by EM layer when exchange
468 * is about to free, this can be used by caller to free its
469 * resources along with exchange free.
471 * The arg is passed back to resp and destructor handler.
473 * The timeout value (in msec) for an exchange is set if non zero
474 * timer_msec argument is specified. The timer is canceled when
475 * it fires or when the exchange is done. The exchange timeout handler
476 * is registered by EM layer.
480 struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *,
481 void (*resp)(struct fc_seq *,
484 void (*destructor)(struct fc_seq *,
486 void *, unsigned int 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 FCoE 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);
518 * Send a frame using an existing sequence and exchange.
522 int (*seq_send)(struct fc_lport *, struct fc_seq *,
526 * Send an ELS response using information from the received frame.
530 void (*seq_els_rsp_send)(struct fc_frame *, enum fc_els_cmd,
531 struct fc_seq_els_data *);
534 * Abort an exchange and sequence. Generally called because of a
535 * exchange timeout or an abort from the upper layer.
537 * A timer_msec can be specified for abort timeout, if non-zero
538 * timer_msec value is specified then exchange resp handler
539 * will be called with timeout error if no response to abort.
543 int (*seq_exch_abort)(const struct fc_seq *,
544 unsigned int timer_msec);
547 * Indicate that an exchange/sequence tuple is complete and the memory
548 * allocated for the related objects may be freed.
552 void (*exch_done)(struct fc_seq *);
555 * Start a new sequence on the same exchange/sequence tuple.
559 struct fc_seq *(*seq_start_next)(struct fc_seq *);
562 * Set a response handler for the exchange of the sequence.
566 void (*seq_set_resp)(struct fc_seq *sp,
567 void (*resp)(struct fc_seq *, struct fc_frame *,
572 * Assign a sequence for an incoming request frame.
576 struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *);
579 * Release the reference on the sequence returned by seq_assign().
583 void (*seq_release)(struct fc_seq *);
586 * Reset an exchange manager, completing all sequences and exchanges.
587 * If s_id is non-zero, reset only exchanges originating from that FID.
588 * If d_id is non-zero, reset only exchanges sending to that FID.
592 void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
595 * Flush the rport work queue. Generally used before shutdown.
599 void (*rport_flush_queue)(void);
602 * Receive a frame for a local port.
606 void (*lport_recv)(struct fc_lport *, struct fc_frame *);
609 * Reset the local port.
613 int (*lport_reset)(struct fc_lport *);
616 * Set the local port FC_ID.
618 * This may be provided by the LLD to allow it to be
619 * notified when the local port is assigned a FC-ID.
621 * The frame, if non-NULL, is the incoming frame with the
622 * FLOGI LS_ACC or FLOGI, and may contain the granted MAC
623 * address for the LLD. The frame pointer may be NULL if
624 * no MAC is associated with this assignment (LOGO or PLOGI).
626 * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid.
628 * Note: this is called with the local port mutex held.
632 void (*lport_set_port_id)(struct fc_lport *, u32 port_id,
636 * Create a remote port with a given port ID
640 struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32);
643 * Initiates the RP state machine. It is called from the LP module.
644 * This function will issue the following commands to the N_Port
645 * identified by the FC ID provided.
653 int (*rport_login)(struct fc_rport_priv *);
656 * Logoff, and remove the rport from the transport if
657 * it had been added. This will send a LOGO to the target.
661 int (*rport_logoff)(struct fc_rport_priv *);
664 * Receive a request from a remote port.
668 void (*rport_recv_req)(struct fc_lport *, struct fc_frame *);
671 * lookup an rport by it's port ID.
675 struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32);
678 * Destroy an rport after final kref_put().
679 * The argument is a pointer to the kref inside the fc_rport_priv.
681 void (*rport_destroy)(struct kref *);
684 * Callback routine after the remote port is logged in
688 void (*rport_event_callback)(struct fc_lport *,
689 struct fc_rport_priv *,
690 enum fc_rport_event);
693 * Send a fcp cmd from fsp pkt.
694 * Called with the SCSI host lock unlocked and irqs disabled.
696 * The resp handler is called when FCP_RSP received.
700 int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
701 void (*resp)(struct fc_seq *, struct fc_frame *,
705 * Cleanup the FCP layer, used during link down and reset
709 void (*fcp_cleanup)(struct fc_lport *);
712 * Abort all I/O on a local port
716 void (*fcp_abort_io)(struct fc_lport *);
719 * Receive a request for the discovery layer.
723 void (*disc_recv_req)(struct fc_lport *, struct fc_frame *);
726 * Start discovery for a local port.
730 void (*disc_start)(void (*disc_callback)(struct fc_lport *,
735 * Stop discovery for a given lport. This will remove
736 * all discovered rports
740 void (*disc_stop) (struct fc_lport *);
743 * Stop discovery for a given lport. This will block
744 * until all discovered rports are deleted from the
749 void (*disc_stop_final) (struct fc_lport *);
753 * struct fc_disc - Discovery context
754 * @retry_count: Number of retries
755 * @pending: 1 if discovery is pending, 0 if not
756 * @requested: 1 if discovery has been requested, 0 if not
757 * @seq_count: Number of sequences used for discovery
758 * @buf_len: Length of the discovery buffer
759 * @disc_id: Discovery ID
760 * @rports: List of discovered remote ports
761 * @priv: Private pointer for use by discovery code
762 * @disc_mutex: Mutex that protects the discovery context
763 * @partial_buf: Partial name buffer (if names are returned
764 * in multiple frames)
765 * @disc_work: handle for delayed work context
766 * @disc_callback: Callback routine called when discovery completes
769 unsigned char retry_count;
770 unsigned char pending;
771 unsigned char requested;
772 unsigned short seq_count;
773 unsigned char buf_len;
776 struct list_head rports;
778 struct mutex disc_mutex;
779 struct fc_gpn_ft_resp partial_buf;
780 struct delayed_work disc_work;
782 void (*disc_callback)(struct fc_lport *,
787 * Local port notifier and events.
789 extern struct blocking_notifier_head fc_lport_notifier_head;
790 enum fc_lport_event {
796 * struct fc_lport - Local port
797 * @host: The SCSI host associated with a local port
798 * @ema_list: Exchange manager anchor list
799 * @dns_rdata: The directory server remote port
800 * @ptp_rdata: Point to point remote port
801 * @scsi_priv: FCP layer internal data
802 * @disc: Discovery context
803 * @vports: Child vports if N_Port
804 * @vport: Parent vport if VN_Port
805 * @tt: Libfc function template
806 * @link_up: Link state (1 = link up, 0 = link down)
807 * @qfull: Queue state (1 queue is full, 0 queue is not full)
808 * @state: Identifies the state
809 * @boot_time: Timestamp indicating when the local port came online
810 * @host_stats: SCSI host statistics
811 * @dev_stats: FCoE device stats (TODO: libfc should not be
813 * @retry_count: Number of retries in the current state
814 * @port_id: FC Port ID
815 * @wwpn: World Wide Port Name
816 * @wwnn: World Wide Node Name
817 * @service_params: Common service parameters
818 * @e_d_tov: Error detection timeout value
819 * @r_a_tov: Resouce allocation timeout value
820 * @rnid_gen: RNID information
821 * @sg_supp: Indicates if scatter gather is supported
822 * @seq_offload: Indicates if sequence offload is supported
823 * @crc_offload: Indicates if CRC offload is supported
824 * @lro_enabled: Indicates if large receive offload is supported
825 * @does_npiv: Supports multiple vports
826 * @npiv_enabled: Switch/fabric allows NPIV
827 * @mfs: The maximum Fibre Channel payload size
828 * @max_retry_count: The maximum retry attempts
829 * @max_rport_retry_count: The maximum remote port retry attempts
830 * @rport_priv_size: Size needed by driver after struct fc_rport_priv
831 * @lro_xid: The maximum XID for LRO
832 * @lso_max: The maximum large offload send size
833 * @fcts: FC-4 type mask
834 * @lp_mutex: Mutex to protect the local port
835 * @list: Linkage on list of vport peers
836 * @retry_work: Handle to local port for delayed retry context
837 * @prov: Pointers available for use by passive FC-4 providers
838 * @lport_list: Linkage on module-wide list of local ports
842 struct Scsi_Host *host;
843 struct list_head ema_list;
844 struct fc_rport_priv *dns_rdata;
845 struct fc_rport_priv *ptp_rdata;
849 /* Virtual port information */
850 struct list_head vports;
851 struct fc_vport *vport;
853 /* Operational Information */
854 struct libfc_function_template tt;
857 enum fc_lport_state state;
858 unsigned long boot_time;
859 struct fc_host_statistics host_stats;
860 struct fcoe_dev_stats *dev_stats;
863 /* Fabric information */
867 unsigned int service_params;
868 unsigned int e_d_tov;
869 unsigned int r_a_tov;
870 struct fc_els_rnid_gen rnid_gen;
879 u32 point_to_multipoint:1;
882 u8 max_rport_retry_count;
885 u16 link_supported_speeds;
887 unsigned int lso_max;
888 struct fc_ns_fts fcts;
891 struct mutex lp_mutex;
892 struct list_head list;
893 struct delayed_work retry_work;
894 void *prov[FC_FC4_PROV_SIZE];
895 struct list_head lport_list;
899 * struct fc4_prov - FC-4 provider registration
900 * @prli: Handler for incoming PRLI
901 * @prlo: Handler for session reset
902 * @recv: Handler for incoming request
903 * @module: Pointer to module. May be NULL.
906 int (*prli)(struct fc_rport_priv *, u32 spp_len,
907 const struct fc_els_spp *spp_in,
908 struct fc_els_spp *spp_out);
909 void (*prlo)(struct fc_rport_priv *);
910 void (*recv)(struct fc_lport *, struct fc_frame *);
911 struct module *module;
915 * Register FC-4 provider with libfc.
917 int fc_fc4_register_provider(enum fc_fh_type type, struct fc4_prov *);
918 void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *);
921 * FC_LPORT HELPER FUNCTIONS
922 *****************************/
925 * fc_lport_test_ready() - Determine if a local port is in the READY state
926 * @lport: The local port to test
928 static inline int fc_lport_test_ready(struct fc_lport *lport)
930 return lport->state == LPORT_ST_READY;
934 * fc_set_wwnn() - Set the World Wide Node Name of a local port
935 * @lport: The local port whose WWNN is to be set
936 * @wwnn: The new WWNN
938 static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
944 * fc_set_wwpn() - Set the World Wide Port Name of a local port
945 * @lport: The local port whose WWPN is to be set
946 * @wwnn: The new WWPN
948 static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn)
954 * fc_lport_state_enter() - Change a local port's state
955 * @lport: The local port whose state is to change
956 * @state: The new state
958 static inline void fc_lport_state_enter(struct fc_lport *lport,
959 enum fc_lport_state state)
961 if (state != lport->state)
962 lport->retry_count = 0;
963 lport->state = state;
967 * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
968 * @lport: The local port whose statistics are to be initialized
970 static inline int fc_lport_init_stats(struct fc_lport *lport)
972 lport->dev_stats = alloc_percpu(struct fcoe_dev_stats);
973 if (!lport->dev_stats)
979 * fc_lport_free_stats() - Free memory for a local port's statistics
980 * @lport: The local port whose statistics are to be freed
982 static inline void fc_lport_free_stats(struct fc_lport *lport)
984 free_percpu(lport->dev_stats);
988 * lport_priv() - Return the private data from a local port
989 * @lport: The local port whose private data is to be retreived
991 static inline void *lport_priv(const struct fc_lport *lport)
993 return (void *)(lport + 1);
997 * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
999 * @sht: The SCSI host template
1000 * @priv_size: Size of private data
1002 * Returns: libfc lport
1004 static inline struct fc_lport *
1005 libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
1007 struct fc_lport *lport;
1008 struct Scsi_Host *shost;
1010 shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
1013 lport = shost_priv(shost);
1014 lport->host = shost;
1015 INIT_LIST_HEAD(&lport->ema_list);
1016 INIT_LIST_HEAD(&lport->vports);
1021 * FC_FCP HELPER FUNCTIONS
1022 *****************************/
1023 static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
1025 if (fsp && fsp->cmd)
1026 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
1032 *****************************/
1033 int fc_lport_init(struct fc_lport *);
1034 int fc_lport_destroy(struct fc_lport *);
1035 int fc_fabric_logoff(struct fc_lport *);
1036 int fc_fabric_login(struct fc_lport *);
1037 void __fc_linkup(struct fc_lport *);
1038 void fc_linkup(struct fc_lport *);
1039 void __fc_linkdown(struct fc_lport *);
1040 void fc_linkdown(struct fc_lport *);
1041 void fc_vport_setlink(struct fc_lport *);
1042 void fc_vports_linkchange(struct fc_lport *);
1043 int fc_lport_config(struct fc_lport *);
1044 int fc_lport_reset(struct fc_lport *);
1045 int fc_set_mfs(struct fc_lport *, u32 mfs);
1046 struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
1047 struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
1048 int fc_lport_bsg_request(struct fc_bsg_job *);
1049 void fc_lport_set_local_id(struct fc_lport *, u32 port_id);
1050 void fc_lport_iterate(void (*func)(struct fc_lport *, void *), void *);
1054 *****************************/
1055 int fc_rport_init(struct fc_lport *);
1056 void fc_rport_terminate_io(struct fc_rport *);
1060 *****************************/
1061 int fc_disc_init(struct fc_lport *);
1063 static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc)
1065 return container_of(disc, struct fc_lport, disc);
1070 *****************************/
1071 int fc_fcp_init(struct fc_lport *);
1072 void fc_fcp_destroy(struct fc_lport *);
1075 * SCSI INTERACTION LAYER
1076 *****************************/
1077 int fc_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
1078 int fc_eh_abort(struct scsi_cmnd *);
1079 int fc_eh_device_reset(struct scsi_cmnd *);
1080 int fc_eh_host_reset(struct scsi_cmnd *);
1081 int fc_slave_alloc(struct scsi_device *);
1082 int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason);
1083 int fc_change_queue_type(struct scsi_device *, int tag_type);
1087 *****************************/
1088 int fc_elsct_init(struct fc_lport *);
1089 struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
1092 void (*resp)(struct fc_seq *,
1095 void *arg, u32 timer_msec);
1096 void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
1097 void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
1098 void fc_fill_reply_hdr(struct fc_frame *, const struct fc_frame *,
1099 enum fc_rctl, u32 parm_offset);
1100 void fc_fill_hdr(struct fc_frame *, const struct fc_frame *,
1101 enum fc_rctl, u32 f_ctl, u16 seq_cnt, u32 parm_offset);
1105 * EXCHANGE MANAGER LAYER
1106 *****************************/
1107 int fc_exch_init(struct fc_lport *);
1108 struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
1109 struct fc_exch_mgr *,
1110 bool (*match)(struct fc_frame *));
1111 void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
1112 int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
1113 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
1114 u16 min_xid, u16 max_xid,
1115 bool (*match)(struct fc_frame *));
1116 void fc_exch_mgr_free(struct fc_lport *);
1117 void fc_exch_recv(struct fc_lport *, struct fc_frame *);
1118 void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
1121 * Functions for fc_functions_template
1123 void fc_get_host_speed(struct Scsi_Host *);
1124 void fc_get_host_port_state(struct Scsi_Host *);
1125 void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
1126 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1128 #endif /* _LIBFC_H_ */