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 unsigned int e_d_tov;
162 unsigned int r_a_tov;
166 * struct fc_rport_priv - libfc remote port and discovery info
167 * @local_port: The associated local port
168 * @rport: The FC transport remote port
169 * @kref: Reference counter
170 * @rp_state: Enumeration that tracks progress of PLOGI, PRLI,
172 * @ids: The remote port identifiers and roles
173 * @flags: STARTED, REC and RETRY_SUPPORTED flags
174 * @max_seq: Maximum number of concurrent sequences
175 * @disc_id: The discovery identifier
176 * @maxframe_size: The maximum frame size
177 * @retries: The retry count for the current state
178 * @major_retries: The retry count for the entire PLOGI/PRLI state machine
179 * @e_d_tov: Error detect timeout value (in msec)
180 * @r_a_tov: Resource allocation timeout value (in msec)
181 * @rp_mutex: The mutex that protects the remote port
182 * @retry_work: Handle for retries
183 * @event_callback: Callback when READY, FAILED or LOGO states complete
184 * @prli_count: Count of open PRLI sessions in providers
185 * @rcu: Structure used for freeing in an RCU-safe manner
187 struct fc_rport_priv {
188 struct fc_lport *local_port;
189 struct fc_rport *rport;
191 enum fc_rport_state rp_state;
192 struct fc_rport_identifiers ids;
197 unsigned int retries;
198 unsigned int major_retries;
199 unsigned int e_d_tov;
200 unsigned int r_a_tov;
201 struct mutex rp_mutex;
202 struct delayed_work retry_work;
203 enum fc_rport_event event;
204 struct fc_rport_operations *ops;
205 struct list_head peers;
206 struct work_struct event_work;
207 u32 supported_classes;
213 * struct fcoe_dev_stats - fcoe stats structure
214 * @SecondsSinceLastReset: Seconds since the last reset
215 * @TxFrames: Number of transmitted frames
216 * @TxWords: Number of transmitted words
217 * @RxFrames: Number of received frames
218 * @RxWords: Number of received words
219 * @ErrorFrames: Number of received error frames
220 * @DumpedFrames: Number of dumped frames
221 * @LinkFailureCount: Number of link failures
222 * @LossOfSignalCount: Number for signal losses
223 * @InvalidTxWordCount: Number of invalid transmitted words
224 * @InvalidCRCCount: Number of invalid CRCs
225 * @InputRequests: Number of input requests
226 * @OutputRequests: Number of output requests
227 * @ControlRequests: Number of control requests
228 * @InputBytes: Number of received bytes
229 * @OutputBytes: Number of transmitted bytes
230 * @VLinkFailureCount: Number of virtual link failures
231 * @MissDiscAdvCount: Number of missing FIP discovery advertisement
233 struct fcoe_dev_stats {
234 u64 SecondsSinceLastReset;
241 u64 LinkFailureCount;
242 u64 LossOfSignalCount;
243 u64 InvalidTxWordCount;
250 u64 VLinkFailureCount;
251 u64 MissDiscAdvCount;
255 * struct fc_seq_els_data - ELS data used for passing ELS specific responses
256 * @reason: The reason for rejection
257 * @explan: The explaination of the rejection
259 * Mainly used by the exchange manager layer.
261 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 * @ref_cnt: Reference count
271 * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the
272 * host_lock if both are to be held at the same time)
273 * @cmd: The SCSI command (set and clear with the host_lock held)
274 * @list: Tracks queued commands (accessed with the host_lock held)
275 * @timer: The command timer
276 * @tm_done: Completion indicator
277 * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies)
278 * @start_time: Timestamp indicating the start of the I/O (in jiffies)
279 * @end_time: Timestamp indicating the end of the I/O (in jiffies)
280 * @last_pkt_time: Timestamp of the last frame received (in jiffies)
281 * @data_len: The length of the data
282 * @cdb_cmd: The CDB command
283 * @xfer_len: The transfer length
284 * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange
285 * will be set here if DDP was setup)
286 * @xfer_contig_end: The offset into the buffer if the buffer is contiguous
288 * @max_payload: The maximum payload size (in bytes)
289 * @io_status: SCSI result (upper 24 bits)
290 * @cdb_status: CDB status
291 * @status_code: FCP I/O status
292 * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun)
293 * @req_flags: Request flags (bit 0: read bit:1 write)
294 * @scsi_resid: SCSI residule length
295 * @rport: The remote port that the SCSI command is targeted at
296 * @seq_ptr: The sequence that will carry the SCSI command
297 * @recov_retry: Number of recovery retries
298 * @recov_seq: The sequence for REC or SRR
301 /* Housekeeping information */
305 spinlock_t scsi_pkt_lock;
307 /* SCSI I/O related information */
308 struct scsi_cmnd *cmd;
309 struct list_head list;
311 /* Timeout related information */
312 struct timer_list timer;
313 struct completion tm_done;
315 unsigned long start_time;
316 unsigned long end_time;
317 unsigned long last_pkt_time;
319 /* SCSI command and data transfer information */
322 /* Transport related veriables */
323 struct fcp_cmnd cdb_cmd;
329 /* SCSI/FCP return status */
337 /* Associated structures */
338 struct fc_rport *rport;
339 struct fc_seq *seq_ptr;
341 /* Error Processing information */
343 struct fc_seq *recov_seq;
347 * Structure and function definitions for managing Fibre Channel Exchanges
350 * fc_exch holds state for one exchange and links to its active sequence.
352 * fc_seq holds the state for an individual sequence.
356 struct fc_exch_mgr_anchor;
357 extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
360 * struct fc_seq - FC sequence
361 * @id: The sequence ID
362 * @ssb_stat: Status flags for the sequence status block (SSB)
363 * @cnt: Number of frames sent so far
364 * @rec_data: FC-4 value for REC
373 #define FC_EX_DONE (1 << 0) /* ep is completed */
374 #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
377 * struct fc_exch - Fibre Channel Exchange
378 * @em: Exchange manager
379 * @pool: Exchange pool
380 * @state: The exchange's state
381 * @xid: The exchange ID
382 * @ex_list: Handle used by the EM to track free exchanges
383 * @ex_lock: Lock that protects the exchange
384 * @ex_refcnt: Reference count
385 * @timeout_work: Handle for timeout handler
386 * @lp: The local port that this exchange is on
387 * @oxid: Originator's exchange ID
388 * @rxid: Responder's exchange ID
389 * @oid: Originator's FCID
391 * @did: Destination FCID
392 * @esb_stat: ESB exchange status
393 * @r_a_tov: Resouce allocation time out value (in msecs)
394 * @seq_id: The next sequence ID to use
395 * @encaps: encapsulation information for lower-level driver
396 * @f_ctl: F_CTL flags for the sequence
397 * @fh_type: The frame type
398 * @class: The class of service
399 * @seq: The sequence in use on this exchange
400 * @resp: Callback for responses on this exchange
401 * @destructor: Called when destroying the exchange
402 * @arg: Passed as a void pointer to the resp() callback
404 * Locking notes: The ex_lock protects following items:
405 * state, esb_stat, f_ctl, seq.ssb_stat
407 * sequence allocation
410 struct fc_exch_mgr *em;
411 struct fc_exch_pool *pool;
414 struct list_head ex_list;
417 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 * Allow LLD to fill its own Link Error Status Block
512 void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb);
514 * Send a frame using an existing sequence and exchange.
518 int (*seq_send)(struct fc_lport *, struct fc_seq *,
522 * Send an ELS response using infomation from the received frame.
526 void (*seq_els_rsp_send)(struct fc_frame *, enum fc_els_cmd,
527 struct fc_seq_els_data *);
530 * Abort an exchange and sequence. Generally called because of a
531 * exchange timeout or an abort from the upper layer.
533 * A timer_msec can be specified for abort timeout, if non-zero
534 * timer_msec value is specified then exchange resp handler
535 * will be called with timeout error if no response to abort.
539 int (*seq_exch_abort)(const struct fc_seq *,
540 unsigned int timer_msec);
543 * Indicate that an exchange/sequence tuple is complete and the memory
544 * allocated for the related objects may be freed.
548 void (*exch_done)(struct fc_seq *);
551 * Start a new sequence on the same exchange/sequence tuple.
555 struct fc_seq *(*seq_start_next)(struct fc_seq *);
558 * Set a response handler for the exchange of the sequence.
562 void (*seq_set_resp)(struct fc_seq *sp,
563 void (*resp)(struct fc_seq *, struct fc_frame *,
568 * Assign a sequence for an incoming request frame.
572 struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *);
575 * Reset an exchange manager, completing all sequences and exchanges.
576 * If s_id is non-zero, reset only exchanges originating from that FID.
577 * If d_id is non-zero, reset only exchanges sending to that FID.
581 void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
584 * Flush the rport work queue. Generally used before shutdown.
588 void (*rport_flush_queue)(void);
591 * Receive a frame for a local port.
595 void (*lport_recv)(struct fc_lport *, struct fc_frame *);
598 * Reset the local port.
602 int (*lport_reset)(struct fc_lport *);
605 * Set the local port FC_ID.
607 * This may be provided by the LLD to allow it to be
608 * notified when the local port is assigned a FC-ID.
610 * The frame, if non-NULL, is the incoming frame with the
611 * FLOGI LS_ACC or FLOGI, and may contain the granted MAC
612 * address for the LLD. The frame pointer may be NULL if
613 * no MAC is associated with this assignment (LOGO or PLOGI).
615 * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid.
617 * Note: this is called with the local port mutex held.
621 void (*lport_set_port_id)(struct fc_lport *, u32 port_id,
625 * Create a remote port with a given port ID
629 struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32);
632 * Initiates the RP state machine. It is called from the LP module.
633 * This function will issue the following commands to the N_Port
634 * identified by the FC ID provided.
642 int (*rport_login)(struct fc_rport_priv *);
645 * Logoff, and remove the rport from the transport if
646 * it had been added. This will send a LOGO to the target.
650 int (*rport_logoff)(struct fc_rport_priv *);
653 * Recieve a request from a remote port.
657 void (*rport_recv_req)(struct fc_lport *, struct fc_frame *);
660 * lookup an rport by it's port ID.
664 struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32);
667 * Destroy an rport after final kref_put().
668 * The argument is a pointer to the kref inside the fc_rport_priv.
670 void (*rport_destroy)(struct kref *);
673 * Send a fcp cmd from fsp pkt.
674 * Called with the SCSI host lock unlocked and irqs disabled.
676 * The resp handler is called when FCP_RSP received.
680 int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
681 void (*resp)(struct fc_seq *, struct fc_frame *,
685 * Cleanup the FCP layer, used durring link down and reset
689 void (*fcp_cleanup)(struct fc_lport *);
692 * Abort all I/O on a local port
696 void (*fcp_abort_io)(struct fc_lport *);
699 * Receive a request for the discovery layer.
703 void (*disc_recv_req)(struct fc_lport *, struct fc_frame *);
706 * Start discovery for a local port.
710 void (*disc_start)(void (*disc_callback)(struct fc_lport *,
715 * Stop discovery for a given lport. This will remove
716 * all discovered rports
720 void (*disc_stop) (struct fc_lport *);
723 * Stop discovery for a given lport. This will block
724 * until all discovered rports are deleted from the
729 void (*disc_stop_final) (struct fc_lport *);
733 * struct fc_disc - Discovery context
734 * @retry_count: Number of retries
735 * @pending: 1 if discovery is pending, 0 if not
736 * @requested: 1 if discovery has been requested, 0 if not
737 * @seq_count: Number of sequences used for discovery
738 * @buf_len: Length of the discovery buffer
739 * @disc_id: Discovery ID
740 * @rports: List of discovered remote ports
741 * @priv: Private pointer for use by discovery code
742 * @disc_mutex: Mutex that protects the discovery context
743 * @partial_buf: Partial name buffer (if names are returned
744 * in multiple frames)
745 * @disc_work: handle for delayed work context
746 * @disc_callback: Callback routine called when discovery completes
749 unsigned char retry_count;
750 unsigned char pending;
751 unsigned char requested;
752 unsigned short seq_count;
753 unsigned char buf_len;
756 struct list_head rports;
758 struct mutex disc_mutex;
759 struct fc_gpn_ft_resp partial_buf;
760 struct delayed_work disc_work;
762 void (*disc_callback)(struct fc_lport *,
767 * struct fc_lport - Local port
768 * @host: The SCSI host associated with a local port
769 * @ema_list: Exchange manager anchor list
770 * @dns_rdata: The directory server remote port
771 * @ptp_rdata: Point to point remote port
772 * @scsi_priv: FCP layer internal data
773 * @disc: Discovery context
774 * @vports: Child vports if N_Port
775 * @vport: Parent vport if VN_Port
776 * @tt: Libfc function template
777 * @link_up: Link state (1 = link up, 0 = link down)
778 * @qfull: Queue state (1 queue is full, 0 queue is not full)
779 * @state: Identifies the state
780 * @boot_time: Timestamp indicating when the local port came online
781 * @host_stats: SCSI host statistics
782 * @dev_stats: FCoE device stats (TODO: libfc should not be
784 * @retry_count: Number of retries in the current state
785 * @port_id: FC Port ID
786 * @wwpn: World Wide Port Name
787 * @wwnn: World Wide Node Name
788 * @service_params: Common service parameters
789 * @e_d_tov: Error detection timeout value
790 * @r_a_tov: Resouce allocation timeout value
791 * @rnid_gen: RNID information
792 * @sg_supp: Indicates if scatter gather is supported
793 * @seq_offload: Indicates if sequence offload is supported
794 * @crc_offload: Indicates if CRC offload is supported
795 * @lro_enabled: Indicates if large receive offload is supported
796 * @does_npiv: Supports multiple vports
797 * @npiv_enabled: Switch/fabric allows NPIV
798 * @mfs: The maximum Fibre Channel payload size
799 * @max_retry_count: The maximum retry attempts
800 * @max_rport_retry_count: The maximum remote port retry attempts
801 * @rport_priv_size: Size needed by driver after struct fc_rport_priv
802 * @lro_xid: The maximum XID for LRO
803 * @lso_max: The maximum large offload send size
804 * @fcts: FC-4 type mask
805 * @lp_mutex: Mutex to protect the local port
806 * @list: Handle for list of local ports
807 * @retry_work: Handle to local port for delayed retry context
811 struct Scsi_Host *host;
812 struct list_head ema_list;
813 struct fc_rport_priv *dns_rdata;
814 struct fc_rport_priv *ptp_rdata;
818 /* Virtual port information */
819 struct list_head vports;
820 struct fc_vport *vport;
822 /* Operational Information */
823 struct libfc_function_template tt;
826 enum fc_lport_state state;
827 unsigned long boot_time;
828 struct fc_host_statistics host_stats;
829 struct fcoe_dev_stats *dev_stats;
832 /* Fabric information */
836 unsigned int service_params;
837 unsigned int e_d_tov;
838 unsigned int r_a_tov;
839 struct fc_els_rnid_gen rnid_gen;
848 u32 point_to_multipoint:1;
851 u8 max_rport_retry_count;
854 u16 link_supported_speeds;
856 unsigned int lso_max;
857 struct fc_ns_fts fcts;
860 struct mutex lp_mutex;
861 struct list_head list;
862 struct delayed_work retry_work;
866 * struct fc4_prov - FC-4 provider registration
867 * @prli: Handler for incoming PRLI
868 * @prlo: Handler for session reset
869 * @recv: Handler for incoming request
870 * @module: Pointer to module. May be NULL.
873 int (*prli)(struct fc_rport_priv *, u32 spp_len,
874 const struct fc_els_spp *spp_in,
875 struct fc_els_spp *spp_out);
876 void (*prlo)(struct fc_rport_priv *);
877 void (*recv)(struct fc_lport *, struct fc_frame *);
878 struct module *module;
882 * Register FC-4 provider with libfc.
884 int fc_fc4_register_provider(enum fc_fh_type type, struct fc4_prov *);
885 void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *);
888 * FC_LPORT HELPER FUNCTIONS
889 *****************************/
892 * fc_lport_test_ready() - Determine if a local port is in the READY state
893 * @lport: The local port to test
895 static inline int fc_lport_test_ready(struct fc_lport *lport)
897 return lport->state == LPORT_ST_READY;
901 * fc_set_wwnn() - Set the World Wide Node Name of a local port
902 * @lport: The local port whose WWNN is to be set
903 * @wwnn: The new WWNN
905 static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
911 * fc_set_wwpn() - Set the World Wide Port Name of a local port
912 * @lport: The local port whose WWPN is to be set
913 * @wwnn: The new WWPN
915 static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn)
921 * fc_lport_state_enter() - Change a local port's state
922 * @lport: The local port whose state is to change
923 * @state: The new state
925 static inline void fc_lport_state_enter(struct fc_lport *lport,
926 enum fc_lport_state state)
928 if (state != lport->state)
929 lport->retry_count = 0;
930 lport->state = state;
934 * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
935 * @lport: The local port whose statistics are to be initialized
937 static inline int fc_lport_init_stats(struct fc_lport *lport)
939 lport->dev_stats = alloc_percpu(struct fcoe_dev_stats);
940 if (!lport->dev_stats)
946 * fc_lport_free_stats() - Free memory for a local port's statistics
947 * @lport: The local port whose statistics are to be freed
949 static inline void fc_lport_free_stats(struct fc_lport *lport)
951 free_percpu(lport->dev_stats);
955 * lport_priv() - Return the private data from a local port
956 * @lport: The local port whose private data is to be retreived
958 static inline void *lport_priv(const struct fc_lport *lport)
960 return (void *)(lport + 1);
964 * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
966 * @sht: The SCSI host template
967 * @priv_size: Size of private data
969 * Returns: libfc lport
971 static inline struct fc_lport *
972 libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
974 struct fc_lport *lport;
975 struct Scsi_Host *shost;
977 shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
980 lport = shost_priv(shost);
982 INIT_LIST_HEAD(&lport->ema_list);
983 INIT_LIST_HEAD(&lport->vports);
988 * FC_FCP HELPER FUNCTIONS
989 *****************************/
990 static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
993 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
999 *****************************/
1000 int fc_lport_init(struct fc_lport *);
1001 int fc_lport_destroy(struct fc_lport *);
1002 int fc_fabric_logoff(struct fc_lport *);
1003 int fc_fabric_login(struct fc_lport *);
1004 void __fc_linkup(struct fc_lport *);
1005 void fc_linkup(struct fc_lport *);
1006 void __fc_linkdown(struct fc_lport *);
1007 void fc_linkdown(struct fc_lport *);
1008 void fc_vport_setlink(struct fc_lport *);
1009 void fc_vports_linkchange(struct fc_lport *);
1010 int fc_lport_config(struct fc_lport *);
1011 int fc_lport_reset(struct fc_lport *);
1012 int fc_set_mfs(struct fc_lport *, u32 mfs);
1013 struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
1014 struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
1015 int fc_lport_bsg_request(struct fc_bsg_job *);
1016 void fc_lport_set_local_id(struct fc_lport *, u32 port_id);
1020 *****************************/
1021 int fc_rport_init(struct fc_lport *);
1022 void fc_rport_terminate_io(struct fc_rport *);
1026 *****************************/
1027 int fc_disc_init(struct fc_lport *);
1029 static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc)
1031 return container_of(disc, struct fc_lport, disc);
1036 *****************************/
1037 int fc_fcp_init(struct fc_lport *);
1038 void fc_fcp_destroy(struct fc_lport *);
1041 * SCSI INTERACTION LAYER
1042 *****************************/
1043 int fc_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
1044 int fc_eh_abort(struct scsi_cmnd *);
1045 int fc_eh_device_reset(struct scsi_cmnd *);
1046 int fc_eh_host_reset(struct scsi_cmnd *);
1047 int fc_slave_alloc(struct scsi_device *);
1048 int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason);
1049 int fc_change_queue_type(struct scsi_device *, int tag_type);
1053 *****************************/
1054 int fc_elsct_init(struct fc_lport *);
1055 struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
1058 void (*resp)(struct fc_seq *,
1061 void *arg, u32 timer_msec);
1062 void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
1063 void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
1064 void fc_fill_reply_hdr(struct fc_frame *, const struct fc_frame *,
1065 enum fc_rctl, u32 parm_offset);
1066 void fc_fill_hdr(struct fc_frame *, const struct fc_frame *,
1067 enum fc_rctl, u32 f_ctl, u16 seq_cnt, u32 parm_offset);
1071 * EXCHANGE MANAGER LAYER
1072 *****************************/
1073 int fc_exch_init(struct fc_lport *);
1074 struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
1075 struct fc_exch_mgr *,
1076 bool (*match)(struct fc_frame *));
1077 void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
1078 int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
1079 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
1080 u16 min_xid, u16 max_xid,
1081 bool (*match)(struct fc_frame *));
1082 void fc_exch_mgr_free(struct fc_lport *);
1083 void fc_exch_recv(struct fc_lport *, struct fc_frame *);
1084 void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
1087 * Functions for fc_functions_template
1089 void fc_get_host_speed(struct Scsi_Host *);
1090 void fc_get_host_port_state(struct Scsi_Host *);
1091 void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
1092 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1094 #endif /* _LIBFC_H_ */