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_SCR: State Change Register (SCR) sent
66 * @LPORT_ST_READY: Ready for use
67 * @LPORT_ST_LOGO: Local port logout (LOGO) sent
68 * @LPORT_ST_RESET: Local port reset
71 LPORT_ST_DISABLED = 0,
91 * enum fc_rport_state - Remote port states
92 * @RPORT_ST_INIT: Initialized
93 * @RPORT_ST_PLOGI: Waiting for PLOGI completion
94 * @RPORT_ST_PRLI: Waiting for PRLI completion
95 * @RPORT_ST_RTV: Waiting for RTV completion
96 * @RPORT_ST_READY: Ready for use
97 * @RPORT_ST_LOGO: Remote port logout (LOGO) sent
98 * @RPORT_ST_ADISC: Discover Address sent
99 * @RPORT_ST_DELETE: Remote port being deleted
100 * @RPORT_ST_RESTART: Remote port being deleted and will restart
102 enum fc_rport_state {
115 * struct fc_disc_port - temporary discovery port to hold rport identifiers
116 * @lp: Fibre Channel host port instance
117 * @peers: Node for list management during discovery and RSCN processing
118 * @rport_work: Work struct for starting the rport state machine
119 * @port_id: Port ID of the discovered port
121 struct fc_disc_port {
123 struct list_head peers;
124 struct work_struct rport_work;
129 * enum fc_rport_event - Remote port events
130 * @RPORT_EV_NONE: No event
131 * @RPORT_EV_READY: Remote port is ready for use
132 * @RPORT_EV_FAILED: State machine failed, remote port is not ready
133 * @RPORT_EV_STOP: Remote port has been stopped
134 * @RPORT_EV_LOGO: Remote port logout (LOGO) sent
136 enum fc_rport_event {
144 struct fc_rport_priv;
147 * struct fc_rport_operations - Operations for a remote port
148 * @event_callback: Function to be called for remote port events
150 struct fc_rport_operations {
151 void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
152 enum fc_rport_event);
156 * struct fc_rport_libfc_priv - libfc internal information about a remote port
157 * @local_port: The associated local port
158 * @rp_state: Indicates READY for I/O or DELETE when blocked
159 * @flags: REC and RETRY supported flags
160 * @e_d_tov: Error detect timeout value (in msec)
161 * @r_a_tov: Resource allocation timeout value (in msec)
163 struct fc_rport_libfc_priv {
164 struct fc_lport *local_port;
165 enum fc_rport_state rp_state;
167 #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
168 #define FC_RP_FLAGS_RETRY (1 << 1)
169 unsigned int e_d_tov;
170 unsigned int r_a_tov;
174 * struct fc_rport_priv - libfc remote port and discovery info
175 * @local_port: The associated local port
176 * @rport: The FC transport remote port
177 * @kref: Reference counter
178 * @rp_state: Enumeration that tracks progress of PLOGI, PRLI,
180 * @ids: The remote port identifiers and roles
181 * @flags: REC and RETRY supported flags
182 * @max_seq: Maximum number of concurrent sequences
183 * @disc_id: The discovery identifier
184 * @maxframe_size: The maximum frame size
185 * @retries: The retry count for the current state
186 * @e_d_tov: Error detect timeout value (in msec)
187 * @r_a_tov: Resource allocation timeout value (in msec)
188 * @rp_mutex: The mutex that protects the remote port
189 * @retry_work: Handle for retries
190 * @event_callback: Callback when READY, FAILED or LOGO states complete
192 struct fc_rport_priv {
193 struct fc_lport *local_port;
194 struct fc_rport *rport;
196 enum fc_rport_state rp_state;
197 struct fc_rport_identifiers ids;
202 unsigned int retries;
203 unsigned int e_d_tov;
204 unsigned int r_a_tov;
205 struct mutex rp_mutex;
206 struct delayed_work retry_work;
207 enum fc_rport_event event;
208 struct fc_rport_operations *ops;
209 struct list_head peers;
210 struct work_struct event_work;
211 u32 supported_classes;
215 * struct fcoe_dev_stats - fcoe stats structure
216 * @SecondsSinceLastReset: Seconds since the last reset
217 * @TxFrames: Number of transmitted frames
218 * @TxWords: Number of transmitted words
219 * @RxFrames: Number of received frames
220 * @RxWords: Number of received words
221 * @ErrorFrames: Number of received error frames
222 * @DumpedFrames: Number of dumped frames
223 * @LinkFailureCount: Number of link failures
224 * @LossOfSignalCount: Number for signal losses
225 * @InvalidTxWordCount: Number of invalid transmitted words
226 * @InvalidCRCCount: Number of invalid CRCs
227 * @InputRequests: Number of input requests
228 * @OutputRequests: Number of output requests
229 * @ControlRequests: Number of control requests
230 * @InputMegabytes: Number of received megabytes
231 * @OutputMegabytes: Number of transmitted megabytes
233 struct fcoe_dev_stats {
234 u64 SecondsSinceLastReset;
241 u64 LinkFailureCount;
242 u64 LossOfSignalCount;
243 u64 InvalidTxWordCount;
253 * struct fc_seq_els_data - ELS data used for passing ELS specific responses
255 * @reason: The reason for rejection
256 * @explan: The explaination of the rejection
258 * Mainly used by the exchange manager layer.
260 struct fc_seq_els_data {
262 enum fc_els_rjt_reason reason;
263 enum fc_els_rjt_explan explan;
267 * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request)
268 * @lp: The associated local port
269 * @state: The state of the I/O
270 * @tgt_flags: Target's flags
271 * @ref_cnt: Reference count
272 * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the
273 * host_lock if both are to be held at the same time)
274 * @cmd: The SCSI command (set and clear with the host_lock held)
275 * @list: Tracks queued commands (accessed with the host_lock held)
276 * @timer: The command timer
277 * @tm_done: Completion indicator
278 * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies)
279 * @start_time: Timestamp indicating the start of the I/O (in jiffies)
280 * @end_time: Timestamp indicating the end of the I/O (in jiffies)
281 * @last_pkt_time: Timestamp of the last frame received (in jiffies)
282 * @data_len: The length of the data
283 * @cdb_cmd: The CDB command
284 * @xfer_len: The transfer length
285 * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange
286 * will be set here if DDP was setup)
287 * @xfer_contig_end: The offset into the buffer if the buffer is contiguous
289 * @max_payload: The maximum payload size (in bytes)
290 * @io_status: SCSI result (upper 24 bits)
291 * @cdb_status: CDB status
292 * @status_code: FCP I/O status
293 * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun)
294 * @req_flags: Request flags (bit 0: read bit:1 write)
295 * @scsi_resid: SCSI residule length
296 * @rport: The remote port that the SCSI command is targeted at
297 * @seq_ptr: The sequence that will carry the SCSI command
298 * @recov_retry: Number of recovery retries
299 * @recov_seq: The sequence for REC or SRR
302 /* Housekeeping information */
307 spinlock_t scsi_pkt_lock;
309 /* SCSI I/O related information */
310 struct scsi_cmnd *cmd;
311 struct list_head list;
313 /* Timeout related information */
314 struct timer_list timer;
315 struct completion tm_done;
317 unsigned long start_time;
318 unsigned long end_time;
319 unsigned long last_pkt_time;
321 /* SCSI command and data transfer information */
324 /* Transport related veriables */
325 struct fcp_cmnd cdb_cmd;
331 /* SCSI/FCP return status */
339 /* Associated structures */
340 struct fc_rport *rport;
341 struct fc_seq *seq_ptr;
343 /* Error Processing information */
345 struct fc_seq *recov_seq;
349 * Structure and function definitions for managing Fibre Channel Exchanges
352 * fc_exch holds state for one exchange and links to its active sequence.
354 * fc_seq holds the state for an individual sequence.
358 struct fc_exch_mgr_anchor;
359 extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
362 * struct fc_seq - FC sequence
363 * @id: The sequence ID
364 * @ssb_stat: Status flags for the sequence status block (SSB)
365 * @cnt: Number of frames sent so far
366 * @rec_data: FC-4 value for REC
375 #define FC_EX_DONE (1 << 0) /* ep is completed */
376 #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
379 * struct fc_exch - Fibre Channel Exchange
380 * @em: Exchange manager
381 * @pool: Exchange pool
382 * @state: The exchange's state
383 * @xid: The exchange ID
384 * @ex_list: Handle used by the EM to track free exchanges
385 * @ex_lock: Lock that protects the exchange
386 * @ex_refcnt: Reference count
387 * @timeout_work: Handle for timeout handler
388 * @lp: The local port that this exchange is on
389 * @oxid: Originator's exchange ID
390 * @rxid: Responder's exchange ID
391 * @oid: Originator's FCID
393 * @did: Destination FCID
394 * @esb_stat: ESB exchange status
395 * @r_a_tov: Resouce allocation time out value (in msecs)
396 * @seq_id: The next sequence ID to use
397 * @f_ctl: F_CTL flags for the sequence
398 * @fh_type: The frame type
399 * @class: The class of service
400 * @seq: The sequence in use on this exchange
401 * @resp: Callback for responses on this exchange
402 * @destructor: Called when destroying the exchange
403 * @arg: Passed as a void pointer to the resp() callback
405 * Locking notes: The ex_lock protects following items:
406 * state, esb_stat, f_ctl, seq.ssb_stat
408 * sequence allocation
411 struct fc_exch_mgr *em;
412 struct fc_exch_pool *pool;
415 struct list_head ex_list;
418 struct delayed_work timeout_work;
433 void (*resp)(struct fc_seq *, struct fc_frame *, void *);
436 void (*destructor)(struct fc_seq *, void *);
439 #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
442 struct libfc_function_template {
444 * Interface to send a FC frame
448 int (*frame_send)(struct fc_lport *, struct fc_frame *);
451 * Interface to send ELS/CT frames
455 struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did,
456 struct fc_frame *, unsigned int op,
457 void (*resp)(struct fc_seq *,
458 struct fc_frame *, void *arg),
459 void *arg, u32 timer_msec);
462 * Send the FC frame payload using a new exchange and sequence.
464 * The exchange response handler is set in this routine to resp()
465 * function pointer. It can be called in two scenarios: if a timeout
466 * occurs or if a response frame is received for the exchange. The
467 * fc_frame pointer in response handler will also indicate timeout
468 * as error using IS_ERR related macros.
470 * The exchange destructor handler is also set in this routine.
471 * The destructor handler is invoked by EM layer when exchange
472 * is about to free, this can be used by caller to free its
473 * resources along with exchange free.
475 * The arg is passed back to resp and destructor handler.
477 * The timeout value (in msec) for an exchange is set if non zero
478 * timer_msec argument is specified. The timer is canceled when
479 * it fires or when the exchange is done. The exchange timeout handler
480 * is registered by EM layer.
484 struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *,
485 void (*resp)(struct fc_seq *,
488 void (*destructor)(struct fc_seq *,
490 void *, unsigned int timer_msec);
493 * Sets up the DDP context for a given exchange id on the given
494 * scatterlist if LLD supports DDP for large receive.
498 int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *,
501 * Completes the DDP transfer and returns the length of data DDPed
502 * for the given exchange id.
506 int (*ddp_done)(struct fc_lport *, u16);
508 * Send a frame using an existing sequence and exchange.
512 int (*seq_send)(struct fc_lport *, struct fc_seq *,
516 * Send an ELS response using infomation from a previous
517 * exchange and sequence.
521 void (*seq_els_rsp_send)(struct fc_seq *, enum fc_els_cmd,
522 struct fc_seq_els_data *);
525 * Abort an exchange and sequence. Generally called because of a
526 * exchange timeout or an abort from the upper layer.
528 * A timer_msec can be specified for abort timeout, if non-zero
529 * timer_msec value is specified then exchange resp handler
530 * will be called with timeout error if no response to abort.
534 int (*seq_exch_abort)(const struct fc_seq *,
535 unsigned int timer_msec);
538 * Indicate that an exchange/sequence tuple is complete and the memory
539 * allocated for the related objects may be freed.
543 void (*exch_done)(struct fc_seq *);
546 * Start a new sequence on the same exchange/sequence tuple.
550 struct fc_seq *(*seq_start_next)(struct fc_seq *);
553 * Reset an exchange manager, completing all sequences and exchanges.
554 * If s_id is non-zero, reset only exchanges originating from that FID.
555 * If d_id is non-zero, reset only exchanges sending to that FID.
559 void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
562 * Flush the rport work queue. Generally used before shutdown.
566 void (*rport_flush_queue)(void);
569 * Receive a frame for a local port.
573 void (*lport_recv)(struct fc_lport *, struct fc_seq *,
577 * Reset the local port.
581 int (*lport_reset)(struct fc_lport *);
584 * Set the local port FC_ID.
586 * This may be provided by the LLD to allow it to be
587 * notified when the local port is assigned a FC-ID.
589 * The frame, if non-NULL, is the incoming frame with the
590 * FLOGI LS_ACC or FLOGI, and may contain the granted MAC
591 * address for the LLD. The frame pointer may be NULL if
592 * no MAC is associated with this assignment (LOGO or PLOGI).
594 * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid.
596 * Note: this is called with the local port mutex held.
600 void (*lport_set_port_id)(struct fc_lport *, u32 port_id,
604 * Create a remote port with a given port ID
608 struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32);
611 * Initiates the RP state machine. It is called from the LP module.
612 * This function will issue the following commands to the N_Port
613 * identified by the FC ID provided.
621 int (*rport_login)(struct fc_rport_priv *);
624 * Logoff, and remove the rport from the transport if
625 * it had been added. This will send a LOGO to the target.
629 int (*rport_logoff)(struct fc_rport_priv *);
632 * Recieve a request from a remote port.
636 void (*rport_recv_req)(struct fc_seq *, struct fc_frame *,
640 * lookup an rport by it's port ID.
644 struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32);
647 * Destroy an rport after final kref_put().
648 * The argument is a pointer to the kref inside the fc_rport_priv.
650 void (*rport_destroy)(struct kref *);
653 * Send a fcp cmd from fsp pkt.
654 * Called with the SCSI host lock unlocked and irqs disabled.
656 * The resp handler is called when FCP_RSP received.
660 int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
661 void (*resp)(struct fc_seq *, struct fc_frame *,
665 * Cleanup the FCP layer, used durring link down and reset
669 void (*fcp_cleanup)(struct fc_lport *);
672 * Abort all I/O on a local port
676 void (*fcp_abort_io)(struct fc_lport *);
679 * Receive a request for the discovery layer.
683 void (*disc_recv_req)(struct fc_seq *, struct fc_frame *,
687 * Start discovery for a local port.
691 void (*disc_start)(void (*disc_callback)(struct fc_lport *,
696 * Stop discovery for a given lport. This will remove
697 * all discovered rports
701 void (*disc_stop) (struct fc_lport *);
704 * Stop discovery for a given lport. This will block
705 * until all discovered rports are deleted from the
710 void (*disc_stop_final) (struct fc_lport *);
714 * struct fc_disc - Discovery context
715 * @retry_count: Number of retries
716 * @pending: 1 if discovery is pending, 0 if not
717 * @requesting: 1 if discovery has been requested, 0 if not
718 * @seq_count: Number of sequences used for discovery
719 * @buf_len: Length of the discovery buffer
720 * @disc_id: Discovery ID
721 * @rports: List of discovered remote ports
722 * @lport: The local port that discovery is for
723 * @disc_mutex: Mutex that protects the discovery context
724 * @partial_buf: Partial name buffer (if names are returned
725 * in multiple frames)
726 * @disc_work: handle for delayed work context
727 * @disc_callback: Callback routine called when discovery completes
730 unsigned char retry_count;
731 unsigned char pending;
732 unsigned char requested;
733 unsigned short seq_count;
734 unsigned char buf_len;
737 struct list_head rports;
738 struct fc_lport *lport;
739 struct mutex disc_mutex;
740 struct fc_gpn_ft_resp partial_buf;
741 struct delayed_work disc_work;
743 void (*disc_callback)(struct fc_lport *,
748 * struct fc_lport - Local port
749 * @host: The SCSI host associated with a local port
750 * @ema_list: Exchange manager anchor list
751 * @dns_rdata: The directory server remote port
752 * @ptp_rdata: Point to point remote port
753 * @scsi_priv: FCP layer internal data
754 * @disc: Discovery context
755 * @vports: Child vports if N_Port
756 * @vport: Parent vport if VN_Port
757 * @tt: Libfc function template
758 * @link_up: Link state (1 = link up, 0 = link down)
759 * @qfull: Queue state (1 queue is full, 0 queue is not full)
760 * @state: Identifies the state
761 * @boot_time: Timestamp indicating when the local port came online
762 * @host_stats: SCSI host statistics
763 * @dev_stats: FCoE device stats (TODO: libfc should not be
765 * @retry_count: Number of retries in the current state
766 * @wwpn: World Wide Port Name
767 * @wwnn: World Wide Node Name
768 * @service_params: Common service parameters
769 * @e_d_tov: Error detection timeout value
770 * @r_a_tov: Resouce allocation timeout value
771 * @rnid_gen: RNID information
772 * @sg_supp: Indicates if scatter gather is supported
773 * @seq_offload: Indicates if sequence offload is supported
774 * @crc_offload: Indicates if CRC offload is supported
775 * @lro_enabled: Indicates if large receive offload is supported
776 * @does_npiv: Supports multiple vports
777 * @npiv_enabled: Switch/fabric allows NPIV
778 * @mfs: The maximum Fibre Channel payload size
779 * @max_retry_count: The maximum retry attempts
780 * @max_rport_retry_count: The maximum remote port retry attempts
781 * @lro_xid: The maximum XID for LRO
782 * @lso_max: The maximum large offload send size
783 * @fcts: FC-4 type mask
784 * @lp_mutex: Mutex to protect the local port
785 * @list: Handle for list of local ports
786 * @retry_work: Handle to local port for delayed retry context
790 struct Scsi_Host *host;
791 struct list_head ema_list;
792 struct fc_rport_priv *dns_rdata;
793 struct fc_rport_priv *ptp_rdata;
797 /* Virtual port information */
798 struct list_head vports;
799 struct fc_vport *vport;
801 /* Operational Information */
802 struct libfc_function_template tt;
805 enum fc_lport_state state;
806 unsigned long boot_time;
807 struct fc_host_statistics host_stats;
808 struct fcoe_dev_stats *dev_stats;
811 /* Fabric information */
814 unsigned int service_params;
815 unsigned int e_d_tov;
816 unsigned int r_a_tov;
817 struct fc_els_rnid_gen rnid_gen;
828 u8 max_rport_retry_count;
830 u16 link_supported_speeds;
832 unsigned int lso_max;
833 struct fc_ns_fts fcts;
836 struct mutex lp_mutex;
837 struct list_head list;
838 struct delayed_work retry_work;
842 * FC_LPORT HELPER FUNCTIONS
843 *****************************/
846 * fc_lport_test_ready() - Determine if a local port is in the READY state
847 * @lport: The local port to test
849 static inline int fc_lport_test_ready(struct fc_lport *lport)
851 return lport->state == LPORT_ST_READY;
855 * fc_set_wwnn() - Set the World Wide Node Name of a local port
856 * @lport: The local port whose WWNN is to be set
857 * @wwnn: The new WWNN
859 static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
865 * fc_set_wwpn() - Set the World Wide Port Name of a local port
866 * @lport: The local port whose WWPN is to be set
867 * @wwnn: The new WWPN
869 static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn)
875 * fc_lport_state_enter() - Change a local port's state
876 * @lport: The local port whose state is to change
877 * @state: The new state
879 static inline void fc_lport_state_enter(struct fc_lport *lport,
880 enum fc_lport_state state)
882 if (state != lport->state)
883 lport->retry_count = 0;
884 lport->state = state;
888 * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
889 * @lport: The local port whose statistics are to be initialized
891 static inline int fc_lport_init_stats(struct fc_lport *lport)
893 lport->dev_stats = alloc_percpu(struct fcoe_dev_stats);
894 if (!lport->dev_stats)
900 * fc_lport_free_stats() - Free memory for a local port's statistics
901 * @lport: The local port whose statistics are to be freed
903 static inline void fc_lport_free_stats(struct fc_lport *lport)
905 free_percpu(lport->dev_stats);
909 * fc_lport_get_stats() - Get a local port's statistics
910 * @lport: The local port whose statistics are to be retreived
912 static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lport)
914 return per_cpu_ptr(lport->dev_stats, smp_processor_id());
918 * lport_priv() - Return the private data from a local port
919 * @lport: The local port whose private data is to be retreived
921 static inline void *lport_priv(const struct fc_lport *lport)
923 return (void *)(lport + 1);
927 * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
929 * @sht: The SCSI host template
930 * @priv_size: Size of private data
932 * Returns: libfc lport
934 static inline struct fc_lport *
935 libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
937 struct fc_lport *lport;
938 struct Scsi_Host *shost;
940 shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
943 lport = shost_priv(shost);
945 INIT_LIST_HEAD(&lport->ema_list);
946 INIT_LIST_HEAD(&lport->vports);
951 * FC_FCP HELPER FUNCTIONS
952 *****************************/
953 static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
956 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
962 *****************************/
963 int fc_lport_init(struct fc_lport *);
964 int fc_lport_destroy(struct fc_lport *);
965 int fc_fabric_logoff(struct fc_lport *);
966 int fc_fabric_login(struct fc_lport *);
967 void __fc_linkup(struct fc_lport *);
968 void fc_linkup(struct fc_lport *);
969 void __fc_linkdown(struct fc_lport *);
970 void fc_linkdown(struct fc_lport *);
971 void fc_vport_setlink(struct fc_lport *);
972 void fc_vports_linkchange(struct fc_lport *);
973 int fc_lport_config(struct fc_lport *);
974 int fc_lport_reset(struct fc_lport *);
975 int fc_set_mfs(struct fc_lport *, u32 mfs);
976 struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
977 struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
978 int fc_lport_bsg_request(struct fc_bsg_job *);
982 *****************************/
983 int fc_rport_init(struct fc_lport *);
984 void fc_rport_terminate_io(struct fc_rport *);
988 *****************************/
989 int fc_disc_init(struct fc_lport *);
993 *****************************/
994 int fc_fcp_init(struct fc_lport *);
995 void fc_fcp_destroy(struct fc_lport *);
998 * SCSI INTERACTION LAYER
999 *****************************/
1000 int fc_queuecommand(struct scsi_cmnd *,
1001 void (*done)(struct scsi_cmnd *));
1002 int fc_eh_abort(struct scsi_cmnd *);
1003 int fc_eh_device_reset(struct scsi_cmnd *);
1004 int fc_eh_host_reset(struct scsi_cmnd *);
1005 int fc_slave_alloc(struct scsi_device *);
1006 int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason);
1007 int fc_change_queue_type(struct scsi_device *, int tag_type);
1011 *****************************/
1012 int fc_elsct_init(struct fc_lport *);
1013 struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
1016 void (*resp)(struct fc_seq *,
1019 void *arg, u32 timer_msec);
1020 void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
1021 void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
1025 * EXCHANGE MANAGER LAYER
1026 *****************************/
1027 int fc_exch_init(struct fc_lport *);
1028 struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
1029 struct fc_exch_mgr *,
1030 bool (*match)(struct fc_frame *));
1031 void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
1032 int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
1033 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
1034 u16 min_xid, u16 max_xid,
1035 bool (*match)(struct fc_frame *));
1036 void fc_exch_mgr_free(struct fc_lport *);
1037 void fc_exch_recv(struct fc_lport *, struct fc_frame *);
1038 void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
1041 * Functions for fc_functions_template
1043 void fc_get_host_speed(struct Scsi_Host *);
1044 void fc_get_host_port_type(struct Scsi_Host *);
1045 void fc_get_host_port_state(struct Scsi_Host *);
1046 void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
1047 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1049 #endif /* _LIBFC_H_ */