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)
51 static inline u32 ntoh24(const u8 *p)
53 return (p[0] << 16) | (p[1] << 8) | p[2];
56 static inline void hton24(u8 *p, u32 v)
58 p[0] = (v >> 16) & 0xff;
59 p[1] = (v >> 8) & 0xff;
64 * enum fc_lport_state - Local port states
65 * @LPORT_ST_DISABLED: Disabled
66 * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent
67 * @LPORT_ST_DNS: Waiting for name server remote port to become ready
68 * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent
69 * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent
70 * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent
71 * @LPORT_ST_SCR: State Change Register (SCR) sent
72 * @LPORT_ST_READY: Ready for use
73 * @LPORT_ST_LOGO: Local port logout (LOGO) sent
74 * @LPORT_ST_RESET: Local port reset
77 LPORT_ST_DISABLED = 0,
98 * enum fc_rport_state - Remote port states
99 * @RPORT_ST_INIT: Initialized
100 * @RPORT_ST_FLOGI: Waiting for FLOGI completion for point-to-multipoint
101 * @RPORT_ST_PLOGI_WAIT: Waiting for peer to login for point-to-multipoint
102 * @RPORT_ST_PLOGI: Waiting for PLOGI completion
103 * @RPORT_ST_PRLI: Waiting for PRLI completion
104 * @RPORT_ST_RTV: Waiting for RTV completion
105 * @RPORT_ST_READY: Ready for use
106 * @RPORT_ST_ADISC: Discover Address sent
107 * @RPORT_ST_DELETE: Remote port being deleted
109 enum fc_rport_state {
122 * struct fc_disc_port - temporary discovery port to hold rport identifiers
123 * @lp: Fibre Channel host port instance
124 * @peers: Node for list management during discovery and RSCN processing
125 * @rport_work: Work struct for starting the rport state machine
126 * @port_id: Port ID of the discovered port
128 struct fc_disc_port {
130 struct list_head peers;
131 struct work_struct rport_work;
136 * enum fc_rport_event - Remote port events
137 * @RPORT_EV_NONE: No event
138 * @RPORT_EV_READY: Remote port is ready for use
139 * @RPORT_EV_FAILED: State machine failed, remote port is not ready
140 * @RPORT_EV_STOP: Remote port has been stopped
141 * @RPORT_EV_LOGO: Remote port logout (LOGO) sent
143 enum fc_rport_event {
151 struct fc_rport_priv;
154 * struct fc_rport_operations - Operations for a remote port
155 * @event_callback: Function to be called for remote port events
157 struct fc_rport_operations {
158 void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
159 enum fc_rport_event);
163 * struct fc_rport_libfc_priv - libfc internal information about a remote port
164 * @local_port: The associated local port
165 * @rp_state: Indicates READY for I/O or DELETE when blocked
166 * @flags: REC and RETRY supported flags
167 * @e_d_tov: Error detect timeout value (in msec)
168 * @r_a_tov: Resource allocation timeout value (in msec)
170 struct fc_rport_libfc_priv {
171 struct fc_lport *local_port;
172 enum fc_rport_state rp_state;
174 #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
175 #define FC_RP_FLAGS_RETRY (1 << 1)
176 #define FC_RP_STARTED (1 << 2)
177 unsigned int e_d_tov;
178 unsigned int r_a_tov;
182 * struct fc_rport_priv - libfc remote port and discovery info
183 * @local_port: The associated local port
184 * @rport: The FC transport remote port
185 * @kref: Reference counter
186 * @rp_state: Enumeration that tracks progress of PLOGI, PRLI,
188 * @ids: The remote port identifiers and roles
189 * @flags: STARTED, REC and RETRY_SUPPORTED flags
190 * @max_seq: Maximum number of concurrent sequences
191 * @disc_id: The discovery identifier
192 * @maxframe_size: The maximum frame size
193 * @retries: The retry count for the current state
194 * @major_retries: The retry count for the entire PLOGI/PRLI state machine
195 * @e_d_tov: Error detect timeout value (in msec)
196 * @r_a_tov: Resource allocation timeout value (in msec)
197 * @rp_mutex: The mutex that protects the remote port
198 * @retry_work: Handle for retries
199 * @event_callback: Callback when READY, FAILED or LOGO states complete
200 * @rcu: Structure used for freeing in an RCU-safe manner
202 struct fc_rport_priv {
203 struct fc_lport *local_port;
204 struct fc_rport *rport;
206 enum fc_rport_state rp_state;
207 struct fc_rport_identifiers ids;
212 unsigned int retries;
213 unsigned int major_retries;
214 unsigned int e_d_tov;
215 unsigned int r_a_tov;
216 struct mutex rp_mutex;
217 struct delayed_work retry_work;
218 enum fc_rport_event event;
219 struct fc_rport_operations *ops;
220 struct list_head peers;
221 struct work_struct event_work;
222 u32 supported_classes;
227 * struct fcoe_dev_stats - fcoe stats structure
228 * @SecondsSinceLastReset: Seconds since the last reset
229 * @TxFrames: Number of transmitted frames
230 * @TxWords: Number of transmitted words
231 * @RxFrames: Number of received frames
232 * @RxWords: Number of received words
233 * @ErrorFrames: Number of received error frames
234 * @DumpedFrames: Number of dumped frames
235 * @LinkFailureCount: Number of link failures
236 * @LossOfSignalCount: Number for signal losses
237 * @InvalidTxWordCount: Number of invalid transmitted words
238 * @InvalidCRCCount: Number of invalid CRCs
239 * @InputRequests: Number of input requests
240 * @OutputRequests: Number of output requests
241 * @ControlRequests: Number of control requests
242 * @InputMegabytes: Number of received megabytes
243 * @OutputMegabytes: Number of transmitted megabytes
244 * @VLinkFailureCount: Number of virtual link failures
245 * @MissDiscAdvCount: Number of missing FIP discovery advertisement
247 struct fcoe_dev_stats {
248 u64 SecondsSinceLastReset;
255 u64 LinkFailureCount;
256 u64 LossOfSignalCount;
257 u64 InvalidTxWordCount;
264 u64 VLinkFailureCount;
265 u64 MissDiscAdvCount;
269 * struct fc_seq_els_data - ELS data used for passing ELS specific responses
271 * @reason: The reason for rejection
272 * @explan: The explaination of the rejection
274 * Mainly used by the exchange manager layer.
276 struct fc_seq_els_data {
278 enum fc_els_rjt_reason reason;
279 enum fc_els_rjt_explan explan;
283 * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request)
284 * @lp: The associated local port
285 * @state: The state of the I/O
286 * @tgt_flags: Target's flags
287 * @ref_cnt: Reference count
288 * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the
289 * host_lock if both are to be held at the same time)
290 * @cmd: The SCSI command (set and clear with the host_lock held)
291 * @list: Tracks queued commands (accessed with the host_lock held)
292 * @timer: The command timer
293 * @tm_done: Completion indicator
294 * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies)
295 * @start_time: Timestamp indicating the start of the I/O (in jiffies)
296 * @end_time: Timestamp indicating the end of the I/O (in jiffies)
297 * @last_pkt_time: Timestamp of the last frame received (in jiffies)
298 * @data_len: The length of the data
299 * @cdb_cmd: The CDB command
300 * @xfer_len: The transfer length
301 * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange
302 * will be set here if DDP was setup)
303 * @xfer_contig_end: The offset into the buffer if the buffer is contiguous
305 * @max_payload: The maximum payload size (in bytes)
306 * @io_status: SCSI result (upper 24 bits)
307 * @cdb_status: CDB status
308 * @status_code: FCP I/O status
309 * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun)
310 * @req_flags: Request flags (bit 0: read bit:1 write)
311 * @scsi_resid: SCSI residule length
312 * @rport: The remote port that the SCSI command is targeted at
313 * @seq_ptr: The sequence that will carry the SCSI command
314 * @recov_retry: Number of recovery retries
315 * @recov_seq: The sequence for REC or SRR
318 /* Housekeeping information */
323 spinlock_t scsi_pkt_lock;
325 /* SCSI I/O related information */
326 struct scsi_cmnd *cmd;
327 struct list_head list;
329 /* Timeout related information */
330 struct timer_list timer;
331 struct completion tm_done;
333 unsigned long start_time;
334 unsigned long end_time;
335 unsigned long last_pkt_time;
337 /* SCSI command and data transfer information */
340 /* Transport related veriables */
341 struct fcp_cmnd cdb_cmd;
347 /* SCSI/FCP return status */
355 /* Associated structures */
356 struct fc_rport *rport;
357 struct fc_seq *seq_ptr;
359 /* Error Processing information */
361 struct fc_seq *recov_seq;
365 * Structure and function definitions for managing Fibre Channel Exchanges
368 * fc_exch holds state for one exchange and links to its active sequence.
370 * fc_seq holds the state for an individual sequence.
374 struct fc_exch_mgr_anchor;
375 extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
378 * struct fc_seq - FC sequence
379 * @id: The sequence ID
380 * @ssb_stat: Status flags for the sequence status block (SSB)
381 * @cnt: Number of frames sent so far
382 * @rec_data: FC-4 value for REC
391 #define FC_EX_DONE (1 << 0) /* ep is completed */
392 #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
395 * struct fc_exch - Fibre Channel Exchange
396 * @em: Exchange manager
397 * @pool: Exchange pool
398 * @state: The exchange's state
399 * @xid: The exchange ID
400 * @ex_list: Handle used by the EM to track free exchanges
401 * @ex_lock: Lock that protects the exchange
402 * @ex_refcnt: Reference count
403 * @timeout_work: Handle for timeout handler
404 * @lp: The local port that this exchange is on
405 * @oxid: Originator's exchange ID
406 * @rxid: Responder's exchange ID
407 * @oid: Originator's FCID
409 * @did: Destination FCID
410 * @esb_stat: ESB exchange status
411 * @r_a_tov: Resouce allocation time out value (in msecs)
412 * @seq_id: The next sequence ID to use
413 * @encaps: encapsulation information for lower-level driver
414 * @f_ctl: F_CTL flags for the sequence
415 * @fh_type: The frame type
416 * @class: The class of service
417 * @seq: The sequence in use on this exchange
418 * @resp: Callback for responses on this exchange
419 * @destructor: Called when destroying the exchange
420 * @arg: Passed as a void pointer to the resp() callback
422 * Locking notes: The ex_lock protects following items:
423 * state, esb_stat, f_ctl, seq.ssb_stat
425 * sequence allocation
428 struct fc_exch_mgr *em;
429 struct fc_exch_pool *pool;
432 struct list_head ex_list;
435 struct delayed_work timeout_work;
451 void (*resp)(struct fc_seq *, struct fc_frame *, void *);
454 void (*destructor)(struct fc_seq *, void *);
457 #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
460 struct libfc_function_template {
462 * Interface to send a FC frame
466 int (*frame_send)(struct fc_lport *, struct fc_frame *);
469 * Interface to send ELS/CT frames
473 struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did,
474 struct fc_frame *, unsigned int op,
475 void (*resp)(struct fc_seq *,
476 struct fc_frame *, void *arg),
477 void *arg, u32 timer_msec);
480 * Send the FC frame payload using a new exchange and sequence.
482 * The exchange response handler is set in this routine to resp()
483 * function pointer. It can be called in two scenarios: if a timeout
484 * occurs or if a response frame is received for the exchange. The
485 * fc_frame pointer in response handler will also indicate timeout
486 * as error using IS_ERR related macros.
488 * The exchange destructor handler is also set in this routine.
489 * The destructor handler is invoked by EM layer when exchange
490 * is about to free, this can be used by caller to free its
491 * resources along with exchange free.
493 * The arg is passed back to resp and destructor handler.
495 * The timeout value (in msec) for an exchange is set if non zero
496 * timer_msec argument is specified. The timer is canceled when
497 * it fires or when the exchange is done. The exchange timeout handler
498 * is registered by EM layer.
502 struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *,
503 void (*resp)(struct fc_seq *,
506 void (*destructor)(struct fc_seq *,
508 void *, unsigned int timer_msec);
511 * Sets up the DDP context for a given exchange id on the given
512 * scatterlist if LLD supports DDP for large receive.
516 int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *,
519 * Completes the DDP transfer and returns the length of data DDPed
520 * for the given exchange id.
524 int (*ddp_done)(struct fc_lport *, u16);
526 * Allow LLD to fill its own Link Error Status Block
530 void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb);
532 * Send a frame using an existing sequence and exchange.
536 int (*seq_send)(struct fc_lport *, struct fc_seq *,
540 * Send an ELS response using infomation from a previous
541 * exchange and sequence.
545 void (*seq_els_rsp_send)(struct fc_seq *, enum fc_els_cmd,
546 struct fc_seq_els_data *);
549 * Abort an exchange and sequence. Generally called because of a
550 * exchange timeout or an abort from the upper layer.
552 * A timer_msec can be specified for abort timeout, if non-zero
553 * timer_msec value is specified then exchange resp handler
554 * will be called with timeout error if no response to abort.
558 int (*seq_exch_abort)(const struct fc_seq *,
559 unsigned int timer_msec);
562 * Indicate that an exchange/sequence tuple is complete and the memory
563 * allocated for the related objects may be freed.
567 void (*exch_done)(struct fc_seq *);
570 * Start a new sequence on the same exchange/sequence tuple.
574 struct fc_seq *(*seq_start_next)(struct fc_seq *);
577 * Reset an exchange manager, completing all sequences and exchanges.
578 * If s_id is non-zero, reset only exchanges originating from that FID.
579 * If d_id is non-zero, reset only exchanges sending to that FID.
583 void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
586 * Flush the rport work queue. Generally used before shutdown.
590 void (*rport_flush_queue)(void);
593 * Receive a frame for a local port.
597 void (*lport_recv)(struct fc_lport *, struct fc_seq *,
601 * Reset the local port.
605 int (*lport_reset)(struct fc_lport *);
608 * Set the local port FC_ID.
610 * This may be provided by the LLD to allow it to be
611 * notified when the local port is assigned a FC-ID.
613 * The frame, if non-NULL, is the incoming frame with the
614 * FLOGI LS_ACC or FLOGI, and may contain the granted MAC
615 * address for the LLD. The frame pointer may be NULL if
616 * no MAC is associated with this assignment (LOGO or PLOGI).
618 * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid.
620 * Note: this is called with the local port mutex held.
624 void (*lport_set_port_id)(struct fc_lport *, u32 port_id,
628 * Create a remote port with a given port ID
632 struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32);
635 * Initiates the RP state machine. It is called from the LP module.
636 * This function will issue the following commands to the N_Port
637 * identified by the FC ID provided.
645 int (*rport_login)(struct fc_rport_priv *);
648 * Logoff, and remove the rport from the transport if
649 * it had been added. This will send a LOGO to the target.
653 int (*rport_logoff)(struct fc_rport_priv *);
656 * Recieve a request from a remote port.
660 void (*rport_recv_req)(struct fc_seq *, struct fc_frame *,
664 * lookup an rport by it's port ID.
668 struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32);
671 * Destroy an rport after final kref_put().
672 * The argument is a pointer to the kref inside the fc_rport_priv.
674 void (*rport_destroy)(struct kref *);
677 * Send a fcp cmd from fsp pkt.
678 * Called with the SCSI host lock unlocked and irqs disabled.
680 * The resp handler is called when FCP_RSP received.
684 int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
685 void (*resp)(struct fc_seq *, struct fc_frame *,
689 * Cleanup the FCP layer, used durring link down and reset
693 void (*fcp_cleanup)(struct fc_lport *);
696 * Abort all I/O on a local port
700 void (*fcp_abort_io)(struct fc_lport *);
703 * Receive a request for the discovery layer.
707 void (*disc_recv_req)(struct fc_seq *, struct fc_frame *,
711 * Start discovery for a local port.
715 void (*disc_start)(void (*disc_callback)(struct fc_lport *,
720 * Stop discovery for a given lport. This will remove
721 * all discovered rports
725 void (*disc_stop) (struct fc_lport *);
728 * Stop discovery for a given lport. This will block
729 * until all discovered rports are deleted from the
734 void (*disc_stop_final) (struct fc_lport *);
738 * struct fc_disc - Discovery context
739 * @retry_count: Number of retries
740 * @pending: 1 if discovery is pending, 0 if not
741 * @requesting: 1 if discovery has been requested, 0 if not
742 * @seq_count: Number of sequences used for discovery
743 * @buf_len: Length of the discovery buffer
744 * @disc_id: Discovery ID
745 * @rports: List of discovered remote ports
746 * @priv: Private pointer for use by discovery code
747 * @disc_mutex: Mutex that protects the discovery context
748 * @partial_buf: Partial name buffer (if names are returned
749 * in multiple frames)
750 * @disc_work: handle for delayed work context
751 * @disc_callback: Callback routine called when discovery completes
754 unsigned char retry_count;
755 unsigned char pending;
756 unsigned char requested;
757 unsigned short seq_count;
758 unsigned char buf_len;
761 struct list_head rports;
763 struct mutex disc_mutex;
764 struct fc_gpn_ft_resp partial_buf;
765 struct delayed_work disc_work;
767 void (*disc_callback)(struct fc_lport *,
772 * struct fc_lport - Local port
773 * @host: The SCSI host associated with a local port
774 * @ema_list: Exchange manager anchor list
775 * @dns_rdata: The directory server remote port
776 * @ptp_rdata: Point to point remote port
777 * @scsi_priv: FCP layer internal data
778 * @disc: Discovery context
779 * @vports: Child vports if N_Port
780 * @vport: Parent vport if VN_Port
781 * @tt: Libfc function template
782 * @link_up: Link state (1 = link up, 0 = link down)
783 * @qfull: Queue state (1 queue is full, 0 queue is not full)
784 * @state: Identifies the state
785 * @boot_time: Timestamp indicating when the local port came online
786 * @host_stats: SCSI host statistics
787 * @dev_stats: FCoE device stats (TODO: libfc should not be
789 * @retry_count: Number of retries in the current state
790 * @port_id: FC Port ID
791 * @wwpn: World Wide Port Name
792 * @wwnn: World Wide Node Name
793 * @service_params: Common service parameters
794 * @e_d_tov: Error detection timeout value
795 * @r_a_tov: Resouce allocation timeout value
796 * @rnid_gen: RNID information
797 * @sg_supp: Indicates if scatter gather is supported
798 * @seq_offload: Indicates if sequence offload is supported
799 * @crc_offload: Indicates if CRC offload is supported
800 * @lro_enabled: Indicates if large receive offload is supported
801 * @does_npiv: Supports multiple vports
802 * @npiv_enabled: Switch/fabric allows NPIV
803 * @mfs: The maximum Fibre Channel payload size
804 * @max_retry_count: The maximum retry attempts
805 * @max_rport_retry_count: The maximum remote port retry attempts
806 * @rport_priv_size: Size needed by driver after struct fc_rport_priv
807 * @lro_xid: The maximum XID for LRO
808 * @lso_max: The maximum large offload send size
809 * @fcts: FC-4 type mask
810 * @lp_mutex: Mutex to protect the local port
811 * @list: Handle for list of local ports
812 * @retry_work: Handle to local port for delayed retry context
816 struct Scsi_Host *host;
817 struct list_head ema_list;
818 struct fc_rport_priv *dns_rdata;
819 struct fc_rport_priv *ptp_rdata;
823 /* Virtual port information */
824 struct list_head vports;
825 struct fc_vport *vport;
827 /* Operational Information */
828 struct libfc_function_template tt;
831 enum fc_lport_state state;
832 unsigned long boot_time;
833 struct fc_host_statistics host_stats;
834 struct fcoe_dev_stats *dev_stats;
837 /* Fabric information */
841 unsigned int service_params;
842 unsigned int e_d_tov;
843 unsigned int r_a_tov;
844 struct fc_els_rnid_gen rnid_gen;
853 u32 point_to_multipoint:1;
856 u8 max_rport_retry_count;
859 u16 link_supported_speeds;
861 unsigned int lso_max;
862 struct fc_ns_fts fcts;
865 struct mutex lp_mutex;
866 struct list_head list;
867 struct delayed_work retry_work;
871 * FC_LPORT HELPER FUNCTIONS
872 *****************************/
875 * fc_lport_test_ready() - Determine if a local port is in the READY state
876 * @lport: The local port to test
878 static inline int fc_lport_test_ready(struct fc_lport *lport)
880 return lport->state == LPORT_ST_READY;
884 * fc_set_wwnn() - Set the World Wide Node Name of a local port
885 * @lport: The local port whose WWNN is to be set
886 * @wwnn: The new WWNN
888 static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
894 * fc_set_wwpn() - Set the World Wide Port Name of a local port
895 * @lport: The local port whose WWPN is to be set
896 * @wwnn: The new WWPN
898 static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn)
904 * fc_lport_state_enter() - Change a local port's state
905 * @lport: The local port whose state is to change
906 * @state: The new state
908 static inline void fc_lport_state_enter(struct fc_lport *lport,
909 enum fc_lport_state state)
911 if (state != lport->state)
912 lport->retry_count = 0;
913 lport->state = state;
917 * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
918 * @lport: The local port whose statistics are to be initialized
920 static inline int fc_lport_init_stats(struct fc_lport *lport)
922 lport->dev_stats = alloc_percpu(struct fcoe_dev_stats);
923 if (!lport->dev_stats)
929 * fc_lport_free_stats() - Free memory for a local port's statistics
930 * @lport: The local port whose statistics are to be freed
932 static inline void fc_lport_free_stats(struct fc_lport *lport)
934 free_percpu(lport->dev_stats);
938 * lport_priv() - Return the private data from a local port
939 * @lport: The local port whose private data is to be retreived
941 static inline void *lport_priv(const struct fc_lport *lport)
943 return (void *)(lport + 1);
947 * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
949 * @sht: The SCSI host template
950 * @priv_size: Size of private data
952 * Returns: libfc lport
954 static inline struct fc_lport *
955 libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
957 struct fc_lport *lport;
958 struct Scsi_Host *shost;
960 shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
963 lport = shost_priv(shost);
965 INIT_LIST_HEAD(&lport->ema_list);
966 INIT_LIST_HEAD(&lport->vports);
971 * FC_FCP HELPER FUNCTIONS
972 *****************************/
973 static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
976 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
982 *****************************/
983 int fc_lport_init(struct fc_lport *);
984 int fc_lport_destroy(struct fc_lport *);
985 int fc_fabric_logoff(struct fc_lport *);
986 int fc_fabric_login(struct fc_lport *);
987 void __fc_linkup(struct fc_lport *);
988 void fc_linkup(struct fc_lport *);
989 void __fc_linkdown(struct fc_lport *);
990 void fc_linkdown(struct fc_lport *);
991 void fc_vport_setlink(struct fc_lport *);
992 void fc_vports_linkchange(struct fc_lport *);
993 int fc_lport_config(struct fc_lport *);
994 int fc_lport_reset(struct fc_lport *);
995 int fc_set_mfs(struct fc_lport *, u32 mfs);
996 struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
997 struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
998 int fc_lport_bsg_request(struct fc_bsg_job *);
999 void fc_lport_set_local_id(struct fc_lport *, u32 port_id);
1003 *****************************/
1004 int fc_rport_init(struct fc_lport *);
1005 void fc_rport_terminate_io(struct fc_rport *);
1009 *****************************/
1010 int fc_disc_init(struct fc_lport *);
1012 static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc)
1014 return container_of(disc, struct fc_lport, disc);
1019 *****************************/
1020 int fc_fcp_init(struct fc_lport *);
1021 void fc_fcp_destroy(struct fc_lport *);
1024 * SCSI INTERACTION LAYER
1025 *****************************/
1026 int fc_queuecommand(struct scsi_cmnd *,
1027 void (*done)(struct scsi_cmnd *));
1028 int fc_eh_abort(struct scsi_cmnd *);
1029 int fc_eh_device_reset(struct scsi_cmnd *);
1030 int fc_eh_host_reset(struct scsi_cmnd *);
1031 int fc_slave_alloc(struct scsi_device *);
1032 int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason);
1033 int fc_change_queue_type(struct scsi_device *, int tag_type);
1037 *****************************/
1038 int fc_elsct_init(struct fc_lport *);
1039 struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
1042 void (*resp)(struct fc_seq *,
1045 void *arg, u32 timer_msec);
1046 void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
1047 void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
1051 * EXCHANGE MANAGER LAYER
1052 *****************************/
1053 int fc_exch_init(struct fc_lport *);
1054 struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
1055 struct fc_exch_mgr *,
1056 bool (*match)(struct fc_frame *));
1057 void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
1058 int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
1059 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
1060 u16 min_xid, u16 max_xid,
1061 bool (*match)(struct fc_frame *));
1062 void fc_exch_mgr_free(struct fc_lport *);
1063 void fc_exch_recv(struct fc_lport *, struct fc_frame *);
1064 void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
1067 * Functions for fc_functions_template
1069 void fc_get_host_speed(struct Scsi_Host *);
1070 void fc_get_host_port_state(struct Scsi_Host *);
1071 void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
1072 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1074 #endif /* _LIBFC_H_ */