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>
41 #define FC_NO_ERR 0 /* no error */
42 #define FC_EX_TIMEOUT 1 /* Exchange timeout */
43 #define FC_EX_CLOSED 2 /* Exchange closed */
45 /* some helpful macros */
47 #define ntohll(x) be64_to_cpu(x)
48 #define htonll(x) cpu_to_be64(x)
50 #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2]))
52 #define hton24(p, v) do { \
53 p[0] = (((v) >> 16) & 0xFF); \
54 p[1] = (((v) >> 8) & 0xFF); \
55 p[2] = ((v) & 0xFF); \
59 * enum fc_lport_state - Local port states
60 * @LPORT_ST_DISABLED: Disabled
61 * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent
62 * @LPORT_ST_DNS: Waiting for name server remote port to become ready
63 * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent
64 * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent
65 * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent
66 * @LPORT_ST_SCR: State Change Register (SCR) sent
67 * @LPORT_ST_READY: Ready for use
68 * @LPORT_ST_LOGO: Local port logout (LOGO) sent
69 * @LPORT_ST_RESET: Local port reset
72 LPORT_ST_DISABLED = 0,
93 * enum fc_rport_state - Remote port states
94 * @RPORT_ST_INIT: Initialized
95 * @RPORT_ST_PLOGI: Waiting for PLOGI completion
96 * @RPORT_ST_PRLI: Waiting for PRLI completion
97 * @RPORT_ST_RTV: Waiting for RTV completion
98 * @RPORT_ST_READY: Ready for use
99 * @RPORT_ST_LOGO: Remote port logout (LOGO) sent
100 * @RPORT_ST_ADISC: Discover Address sent
101 * @RPORT_ST_DELETE: Remote port being deleted
102 * @RPORT_ST_RESTART: Remote port being deleted and will restart
104 enum fc_rport_state {
117 * struct fc_disc_port - temporary discovery port to hold rport identifiers
118 * @lp: Fibre Channel host port instance
119 * @peers: Node for list management during discovery and RSCN processing
120 * @rport_work: Work struct for starting the rport state machine
121 * @port_id: Port ID of the discovered port
123 struct fc_disc_port {
125 struct list_head peers;
126 struct work_struct rport_work;
131 * enum fc_rport_event - Remote port events
132 * @RPORT_EV_NONE: No event
133 * @RPORT_EV_READY: Remote port is ready for use
134 * @RPORT_EV_FAILED: State machine failed, remote port is not ready
135 * @RPORT_EV_STOP: Remote port has been stopped
136 * @RPORT_EV_LOGO: Remote port logout (LOGO) sent
138 enum fc_rport_event {
146 struct fc_rport_priv;
149 * struct fc_rport_operations - Operations for a remote port
150 * @event_callback: Function to be called for remote port events
152 struct fc_rport_operations {
153 void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
154 enum fc_rport_event);
158 * struct fc_rport_libfc_priv - libfc internal information about a remote port
159 * @local_port: The associated local port
160 * @rp_state: Indicates READY for I/O or DELETE when blocked
161 * @flags: REC and RETRY supported flags
162 * @e_d_tov: Error detect timeout value (in msec)
163 * @r_a_tov: Resource allocation timeout value (in msec)
165 struct fc_rport_libfc_priv {
166 struct fc_lport *local_port;
167 enum fc_rport_state rp_state;
169 #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
170 #define FC_RP_FLAGS_RETRY (1 << 1)
171 unsigned int e_d_tov;
172 unsigned int r_a_tov;
176 * struct fc_rport_priv - libfc remote port and discovery info
177 * @local_port: The associated local port
178 * @rport: The FC transport remote port
179 * @kref: Reference counter
180 * @rp_state: Enumeration that tracks progress of PLOGI, PRLI,
182 * @ids: The remote port identifiers and roles
183 * @flags: REC and RETRY supported flags
184 * @max_seq: Maximum number of concurrent sequences
185 * @disc_id: The discovery identifier
186 * @maxframe_size: The maximum frame size
187 * @retries: The retry count for the current state
188 * @e_d_tov: Error detect timeout value (in msec)
189 * @r_a_tov: Resource allocation timeout value (in msec)
190 * @rp_mutex: The mutex that protects the remote port
191 * @retry_work: Handle for retries
192 * @event_callback: Callback when READY, FAILED or LOGO states complete
194 struct fc_rport_priv {
195 struct fc_lport *local_port;
196 struct fc_rport *rport;
198 enum fc_rport_state rp_state;
199 struct fc_rport_identifiers ids;
204 unsigned int retries;
205 unsigned int e_d_tov;
206 unsigned int r_a_tov;
207 struct mutex rp_mutex;
208 struct delayed_work retry_work;
209 enum fc_rport_event event;
210 struct fc_rport_operations *ops;
211 struct list_head peers;
212 struct work_struct event_work;
213 u32 supported_classes;
217 * struct fcoe_dev_stats - fcoe stats structure
218 * @SecondsSinceLastReset: Seconds since the last reset
219 * @TxFrames: Number of transmitted frames
220 * @TxWords: Number of transmitted words
221 * @RxFrames: Number of received frames
222 * @RxWords: Number of received words
223 * @ErrorFrames: Number of received error frames
224 * @DumpedFrames: Number of dumped frames
225 * @LinkFailureCount: Number of link failures
226 * @LossOfSignalCount: Number for signal losses
227 * @InvalidTxWordCount: Number of invalid transmitted words
228 * @InvalidCRCCount: Number of invalid CRCs
229 * @InputRequests: Number of input requests
230 * @OutputRequests: Number of output requests
231 * @ControlRequests: Number of control requests
232 * @InputMegabytes: Number of received megabytes
233 * @OutputMegabytes: Number of transmitted megabytes
235 struct fcoe_dev_stats {
236 u64 SecondsSinceLastReset;
243 u64 LinkFailureCount;
244 u64 LossOfSignalCount;
245 u64 InvalidTxWordCount;
255 * struct fc_seq_els_data - ELS data used for passing ELS specific responses
257 * @reason: The reason for rejection
258 * @explan: The explaination of the rejection
260 * Mainly used by the exchange manager layer.
262 struct fc_seq_els_data {
264 enum fc_els_rjt_reason reason;
265 enum fc_els_rjt_explan explan;
269 * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request)
270 * @lp: The associated local port
271 * @state: The state of the I/O
272 * @tgt_flags: Target's flags
273 * @ref_cnt: Reference count
274 * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the
275 * host_lock if both are to be held at the same time)
276 * @cmd: The SCSI command (set and clear with the host_lock held)
277 * @list: Tracks queued commands (accessed with the host_lock held)
278 * @timer: The command timer
279 * @tm_done: Completion indicator
280 * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies)
281 * @start_time: Timestamp indicating the start of the I/O (in jiffies)
282 * @end_time: Timestamp indicating the end of the I/O (in jiffies)
283 * @last_pkt_time: Timestamp of the last frame received (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 /* Housekeeping information */
309 spinlock_t scsi_pkt_lock;
311 /* SCSI I/O related information */
312 struct scsi_cmnd *cmd;
313 struct list_head list;
315 /* Timeout related information */
316 struct timer_list timer;
317 struct completion tm_done;
319 unsigned long start_time;
320 unsigned long end_time;
321 unsigned long last_pkt_time;
323 /* SCSI command and data transfer information */
326 /* Transport related veriables */
327 struct fcp_cmnd cdb_cmd;
333 /* SCSI/FCP return status */
341 /* Associated structures */
342 struct fc_rport *rport;
343 struct fc_seq *seq_ptr;
345 /* Error Processing information */
347 struct fc_seq *recov_seq;
351 * Structure and function definitions for managing Fibre Channel Exchanges
354 * fc_exch holds state for one exchange and links to its active sequence.
356 * fc_seq holds the state for an individual sequence.
360 struct fc_exch_mgr_anchor;
361 extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
364 * struct fc_seq - FC sequence
365 * @id: The sequence ID
366 * @ssb_stat: Status flags for the sequence status block (SSB)
367 * @cnt: Number of frames sent so far
368 * @rec_data: FC-4 value for REC
377 #define FC_EX_DONE (1 << 0) /* ep is completed */
378 #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
381 * struct fc_exch - Fibre Channel Exchange
382 * @em: Exchange manager
383 * @pool: Exchange pool
384 * @state: The exchange's state
385 * @xid: The exchange ID
386 * @ex_list: Handle used by the EM to track free exchanges
387 * @ex_lock: Lock that protects the exchange
388 * @ex_refcnt: Reference count
389 * @timeout_work: Handle for timeout handler
390 * @lp: The local port that this exchange is on
391 * @oxid: Originator's exchange ID
392 * @rxid: Responder's exchange ID
393 * @oid: Originator's FCID
395 * @did: Destination FCID
396 * @esb_stat: ESB exchange status
397 * @r_a_tov: Resouce allocation time out value (in msecs)
398 * @seq_id: The next sequence ID to use
399 * @f_ctl: F_CTL flags for the sequence
400 * @fh_type: The frame type
401 * @class: The class of service
402 * @seq: The sequence in use on this exchange
403 * @resp: Callback for responses on this exchange
404 * @destructor: Called when destroying the exchange
405 * @arg: Passed as a void pointer to the resp() callback
407 * Locking notes: The ex_lock protects following items:
408 * state, esb_stat, f_ctl, seq.ssb_stat
410 * sequence allocation
413 struct fc_exch_mgr *em;
414 struct fc_exch_pool *pool;
417 struct list_head ex_list;
420 struct delayed_work timeout_work;
435 void (*resp)(struct fc_seq *, struct fc_frame *, void *);
438 void (*destructor)(struct fc_seq *, void *);
441 #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
444 struct libfc_function_template {
446 * Interface to send a FC frame
450 int (*frame_send)(struct fc_lport *, struct fc_frame *);
453 * Interface to send ELS/CT frames
457 struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did,
458 struct fc_frame *, unsigned int op,
459 void (*resp)(struct fc_seq *,
460 struct fc_frame *, void *arg),
461 void *arg, u32 timer_msec);
464 * Send the FC frame payload using a new exchange and sequence.
466 * The exchange response handler is set in this routine to resp()
467 * function pointer. It can be called in two scenarios: if a timeout
468 * occurs or if a response frame is received for the exchange. The
469 * fc_frame pointer in response handler will also indicate timeout
470 * as error using IS_ERR related macros.
472 * The exchange destructor handler is also set in this routine.
473 * The destructor handler is invoked by EM layer when exchange
474 * is about to free, this can be used by caller to free its
475 * resources along with exchange free.
477 * The arg is passed back to resp and destructor handler.
479 * The timeout value (in msec) for an exchange is set if non zero
480 * timer_msec argument is specified. The timer is canceled when
481 * it fires or when the exchange is done. The exchange timeout handler
482 * is registered by EM layer.
486 struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *,
487 void (*resp)(struct fc_seq *,
490 void (*destructor)(struct fc_seq *,
492 void *, unsigned int timer_msec);
495 * Sets up the DDP context for a given exchange id on the given
496 * scatterlist if LLD supports DDP for large receive.
500 int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *,
503 * Completes the DDP transfer and returns the length of data DDPed
504 * for the given exchange id.
508 int (*ddp_done)(struct fc_lport *, u16);
510 * Send a frame using an existing sequence and exchange.
514 int (*seq_send)(struct fc_lport *, struct fc_seq *,
518 * Send an ELS response using infomation from a previous
519 * exchange and sequence.
523 void (*seq_els_rsp_send)(struct fc_seq *, enum fc_els_cmd,
524 struct fc_seq_els_data *);
527 * Abort an exchange and sequence. Generally called because of a
528 * exchange timeout or an abort from the upper layer.
530 * A timer_msec can be specified for abort timeout, if non-zero
531 * timer_msec value is specified then exchange resp handler
532 * will be called with timeout error if no response to abort.
536 int (*seq_exch_abort)(const struct fc_seq *,
537 unsigned int timer_msec);
540 * Indicate that an exchange/sequence tuple is complete and the memory
541 * allocated for the related objects may be freed.
545 void (*exch_done)(struct fc_seq *);
548 * Start a new sequence on the same exchange/sequence tuple.
552 struct fc_seq *(*seq_start_next)(struct fc_seq *);
555 * Reset an exchange manager, completing all sequences and exchanges.
556 * If s_id is non-zero, reset only exchanges originating from that FID.
557 * If d_id is non-zero, reset only exchanges sending to that FID.
561 void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
564 * Flush the rport work queue. Generally used before shutdown.
568 void (*rport_flush_queue)(void);
571 * Receive a frame for a local port.
575 void (*lport_recv)(struct fc_lport *, struct fc_seq *,
579 * Reset the local port.
583 int (*lport_reset)(struct fc_lport *);
586 * Set the local port FC_ID.
588 * This may be provided by the LLD to allow it to be
589 * notified when the local port is assigned a FC-ID.
591 * The frame, if non-NULL, is the incoming frame with the
592 * FLOGI LS_ACC or FLOGI, and may contain the granted MAC
593 * address for the LLD. The frame pointer may be NULL if
594 * no MAC is associated with this assignment (LOGO or PLOGI).
596 * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid.
598 * Note: this is called with the local port mutex held.
602 void (*lport_set_port_id)(struct fc_lport *, u32 port_id,
606 * Create a remote port with a given port ID
610 struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32);
613 * Initiates the RP state machine. It is called from the LP module.
614 * This function will issue the following commands to the N_Port
615 * identified by the FC ID provided.
623 int (*rport_login)(struct fc_rport_priv *);
626 * Logoff, and remove the rport from the transport if
627 * it had been added. This will send a LOGO to the target.
631 int (*rport_logoff)(struct fc_rport_priv *);
634 * Recieve a request from a remote port.
638 void (*rport_recv_req)(struct fc_seq *, struct fc_frame *,
642 * lookup an rport by it's port ID.
646 struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32);
649 * Destroy an rport after final kref_put().
650 * The argument is a pointer to the kref inside the fc_rport_priv.
652 void (*rport_destroy)(struct kref *);
655 * Send a fcp cmd from fsp pkt.
656 * Called with the SCSI host lock unlocked and irqs disabled.
658 * The resp handler is called when FCP_RSP received.
662 int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
663 void (*resp)(struct fc_seq *, struct fc_frame *,
667 * Cleanup the FCP layer, used durring link down and reset
671 void (*fcp_cleanup)(struct fc_lport *);
674 * Abort all I/O on a local port
678 void (*fcp_abort_io)(struct fc_lport *);
681 * Receive a request for the discovery layer.
685 void (*disc_recv_req)(struct fc_seq *, struct fc_frame *,
689 * Start discovery for a local port.
693 void (*disc_start)(void (*disc_callback)(struct fc_lport *,
698 * Stop discovery for a given lport. This will remove
699 * all discovered rports
703 void (*disc_stop) (struct fc_lport *);
706 * Stop discovery for a given lport. This will block
707 * until all discovered rports are deleted from the
712 void (*disc_stop_final) (struct fc_lport *);
716 * struct fc_disc - Discovery context
717 * @retry_count: Number of retries
718 * @pending: 1 if discovery is pending, 0 if not
719 * @requesting: 1 if discovery has been requested, 0 if not
720 * @seq_count: Number of sequences used for discovery
721 * @buf_len: Length of the discovery buffer
722 * @disc_id: Discovery ID
723 * @rports: List of discovered remote ports
724 * @lport: The local port that discovery is for
725 * @disc_mutex: Mutex that protects the discovery context
726 * @partial_buf: Partial name buffer (if names are returned
727 * in multiple frames)
728 * @disc_work: handle for delayed work context
729 * @disc_callback: Callback routine called when discovery completes
732 unsigned char retry_count;
733 unsigned char pending;
734 unsigned char requested;
735 unsigned short seq_count;
736 unsigned char buf_len;
739 struct list_head rports;
740 struct fc_lport *lport;
741 struct mutex disc_mutex;
742 struct fc_gpn_ft_resp partial_buf;
743 struct delayed_work disc_work;
745 void (*disc_callback)(struct fc_lport *,
750 * struct fc_lport - Local port
751 * @host: The SCSI host associated with a local port
752 * @ema_list: Exchange manager anchor list
753 * @dns_rdata: The directory server remote port
754 * @ptp_rdata: Point to point remote port
755 * @scsi_priv: FCP layer internal data
756 * @disc: Discovery context
757 * @vports: Child vports if N_Port
758 * @vport: Parent vport if VN_Port
759 * @tt: Libfc function template
760 * @link_up: Link state (1 = link up, 0 = link down)
761 * @qfull: Queue state (1 queue is full, 0 queue is not full)
762 * @state: Identifies the state
763 * @boot_time: Timestamp indicating when the local port came online
764 * @host_stats: SCSI host statistics
765 * @dev_stats: FCoE device stats (TODO: libfc should not be
767 * @retry_count: Number of retries in the current state
768 * @wwpn: World Wide Port Name
769 * @wwnn: World Wide Node Name
770 * @service_params: Common service parameters
771 * @e_d_tov: Error detection timeout value
772 * @r_a_tov: Resouce allocation timeout value
773 * @rnid_gen: RNID information
774 * @sg_supp: Indicates if scatter gather is supported
775 * @seq_offload: Indicates if sequence offload is supported
776 * @crc_offload: Indicates if CRC offload is supported
777 * @lro_enabled: Indicates if large receive offload is supported
778 * @does_npiv: Supports multiple vports
779 * @npiv_enabled: Switch/fabric allows NPIV
780 * @mfs: The maximum Fibre Channel payload size
781 * @max_retry_count: The maximum retry attempts
782 * @max_rport_retry_count: The maximum remote port retry attempts
783 * @lro_xid: The maximum XID for LRO
784 * @lso_max: The maximum large offload send size
785 * @fcts: FC-4 type mask
786 * @lp_mutex: Mutex to protect the local port
787 * @list: Handle for list of local ports
788 * @retry_work: Handle to local port for delayed retry context
792 struct Scsi_Host *host;
793 struct list_head ema_list;
794 struct fc_rport_priv *dns_rdata;
795 struct fc_rport_priv *ptp_rdata;
799 /* Virtual port information */
800 struct list_head vports;
801 struct fc_vport *vport;
803 /* Operational Information */
804 struct libfc_function_template tt;
807 enum fc_lport_state state;
808 unsigned long boot_time;
809 struct fc_host_statistics host_stats;
810 struct fcoe_dev_stats *dev_stats;
813 /* Fabric information */
816 unsigned int service_params;
817 unsigned int e_d_tov;
818 unsigned int r_a_tov;
819 struct fc_els_rnid_gen rnid_gen;
830 u8 max_rport_retry_count;
832 u16 link_supported_speeds;
834 unsigned int lso_max;
835 struct fc_ns_fts fcts;
838 struct mutex lp_mutex;
839 struct list_head list;
840 struct delayed_work retry_work;
844 * FC_LPORT HELPER FUNCTIONS
845 *****************************/
848 * fc_lport_test_ready() - Determine if a local port is in the READY state
849 * @lport: The local port to test
851 static inline int fc_lport_test_ready(struct fc_lport *lport)
853 return lport->state == LPORT_ST_READY;
857 * fc_set_wwnn() - Set the World Wide Node Name of a local port
858 * @lport: The local port whose WWNN is to be set
859 * @wwnn: The new WWNN
861 static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
867 * fc_set_wwpn() - Set the World Wide Port Name of a local port
868 * @lport: The local port whose WWPN is to be set
869 * @wwnn: The new WWPN
871 static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn)
877 * fc_lport_state_enter() - Change a local port's state
878 * @lport: The local port whose state is to change
879 * @state: The new state
881 static inline void fc_lport_state_enter(struct fc_lport *lport,
882 enum fc_lport_state state)
884 if (state != lport->state)
885 lport->retry_count = 0;
886 lport->state = state;
890 * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
891 * @lport: The local port whose statistics are to be initialized
893 static inline int fc_lport_init_stats(struct fc_lport *lport)
895 lport->dev_stats = alloc_percpu(struct fcoe_dev_stats);
896 if (!lport->dev_stats)
902 * fc_lport_free_stats() - Free memory for a local port's statistics
903 * @lport: The local port whose statistics are to be freed
905 static inline void fc_lport_free_stats(struct fc_lport *lport)
907 free_percpu(lport->dev_stats);
911 * fc_lport_get_stats() - Get a local port's statistics
912 * @lport: The local port whose statistics are to be retreived
914 static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lport)
916 return per_cpu_ptr(lport->dev_stats, smp_processor_id());
920 * lport_priv() - Return the private data from a local port
921 * @lport: The local port whose private data is to be retreived
923 static inline void *lport_priv(const struct fc_lport *lport)
925 return (void *)(lport + 1);
929 * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
931 * @sht: The SCSI host template
932 * @priv_size: Size of private data
934 * Returns: libfc lport
936 static inline struct fc_lport *
937 libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
939 struct fc_lport *lport;
940 struct Scsi_Host *shost;
942 shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
945 lport = shost_priv(shost);
947 INIT_LIST_HEAD(&lport->ema_list);
948 INIT_LIST_HEAD(&lport->vports);
953 * FC_FCP HELPER FUNCTIONS
954 *****************************/
955 static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
958 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
964 *****************************/
965 int fc_lport_init(struct fc_lport *);
966 int fc_lport_destroy(struct fc_lport *);
967 int fc_fabric_logoff(struct fc_lport *);
968 int fc_fabric_login(struct fc_lport *);
969 void __fc_linkup(struct fc_lport *);
970 void fc_linkup(struct fc_lport *);
971 void __fc_linkdown(struct fc_lport *);
972 void fc_linkdown(struct fc_lport *);
973 void fc_vport_setlink(struct fc_lport *);
974 void fc_vports_linkchange(struct fc_lport *);
975 int fc_lport_config(struct fc_lport *);
976 int fc_lport_reset(struct fc_lport *);
977 int fc_set_mfs(struct fc_lport *, u32 mfs);
978 struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
979 struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
980 int fc_lport_bsg_request(struct fc_bsg_job *);
984 *****************************/
985 int fc_rport_init(struct fc_lport *);
986 void fc_rport_terminate_io(struct fc_rport *);
990 *****************************/
991 int fc_disc_init(struct fc_lport *);
995 *****************************/
996 int fc_fcp_init(struct fc_lport *);
997 void fc_fcp_destroy(struct fc_lport *);
1000 * SCSI INTERACTION LAYER
1001 *****************************/
1002 int fc_queuecommand(struct scsi_cmnd *,
1003 void (*done)(struct scsi_cmnd *));
1004 int fc_eh_abort(struct scsi_cmnd *);
1005 int fc_eh_device_reset(struct scsi_cmnd *);
1006 int fc_eh_host_reset(struct scsi_cmnd *);
1007 int fc_slave_alloc(struct scsi_device *);
1008 int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason);
1009 int fc_change_queue_type(struct scsi_device *, int tag_type);
1013 *****************************/
1014 int fc_elsct_init(struct fc_lport *);
1015 struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
1018 void (*resp)(struct fc_seq *,
1021 void *arg, u32 timer_msec);
1022 void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
1023 void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
1027 * EXCHANGE MANAGER LAYER
1028 *****************************/
1029 int fc_exch_init(struct fc_lport *);
1030 struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
1031 struct fc_exch_mgr *,
1032 bool (*match)(struct fc_frame *));
1033 void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
1034 int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
1035 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
1036 u16 min_xid, u16 max_xid,
1037 bool (*match)(struct fc_frame *));
1038 void fc_exch_mgr_free(struct fc_lport *);
1039 void fc_exch_recv(struct fc_lport *, struct fc_frame *);
1040 void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
1043 * Functions for fc_functions_template
1045 void fc_get_host_speed(struct Scsi_Host *);
1046 void fc_get_host_port_type(struct Scsi_Host *);
1047 void fc_get_host_port_state(struct Scsi_Host *);
1048 void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
1049 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1051 #endif /* _LIBFC_H_ */