blob: 7495c0ba67ee398ceba1ab8fa9e1ed6ce801958d [file] [log] [blame]
Robert Love42e9a922008-12-09 15:10:17 -08001/*
2 * Copyright(c) 2007 Intel Corporation. All rights reserved.
3 *
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.
7 *
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
11 * more details.
12 *
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.
16 *
17 * Maintained at www.Open-FCoE.org
18 */
19
20#ifndef _LIBFC_H_
21#define _LIBFC_H_
22
23#include <linux/timer.h>
24#include <linux/if.h>
Robert Love582b45b2009-03-31 15:51:50 -070025#include <linux/percpu.h>
Robert Love42e9a922008-12-09 15:10:17 -080026
27#include <scsi/scsi_transport.h>
28#include <scsi/scsi_transport_fc.h>
Steve Maa51ab392009-11-03 11:47:34 -080029#include <scsi/scsi_bsg_fc.h>
Robert Love42e9a922008-12-09 15:10:17 -080030
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>
35
36#include <scsi/fc_frame.h>
37
Robert Love42e9a922008-12-09 15:10:17 -080038/*
39 * libfc error codes
40 */
41#define FC_NO_ERR 0 /* no error */
42#define FC_EX_TIMEOUT 1 /* Exchange timeout */
43#define FC_EX_CLOSED 2 /* Exchange closed */
44
45/* some helpful macros */
46
47#define ntohll(x) be64_to_cpu(x)
48#define htonll(x) cpu_to_be64(x)
49
Robert Love42e9a922008-12-09 15:10:17 -080050
Joe Eykholt0b2f74a2010-04-09 14:22:39 -070051static inline u32 ntoh24(const u8 *p)
52{
53 return (p[0] << 16) | (p[1] << 8) | p[2];
54}
55
56static inline void hton24(u8 *p, u32 v)
57{
58 p[0] = (v >> 16) & 0xff;
59 p[1] = (v >> 8) & 0xff;
60 p[2] = v & 0xff;
61}
Robert Love42e9a922008-12-09 15:10:17 -080062
Robert Love3a3b42b2009-11-03 11:47:39 -080063/**
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
Joe Eykholtab593b12009-11-03 11:49:27 -080070 * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent
Robert Love3a3b42b2009-11-03 11:47:39 -080071 * @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
Robert Love42e9a922008-12-09 15:10:17 -080075 */
Robert Love42e9a922008-12-09 15:10:17 -080076enum fc_lport_state {
Joe Eykholtb1d9fd52009-07-29 17:04:22 -070077 LPORT_ST_DISABLED = 0,
Robert Love42e9a922008-12-09 15:10:17 -080078 LPORT_ST_FLOGI,
79 LPORT_ST_DNS,
Chris Leechc9c7bd72009-11-03 11:46:51 -080080 LPORT_ST_RNN_ID,
Chris Leech5baa17c2009-11-03 11:46:56 -080081 LPORT_ST_RSNN_NN,
Chris Leechc9866a52009-11-03 11:47:01 -080082 LPORT_ST_RSPN_ID,
Robert Love42e9a922008-12-09 15:10:17 -080083 LPORT_ST_RFT_ID,
Joe Eykholtab593b12009-11-03 11:49:27 -080084 LPORT_ST_RFF_ID,
Robert Love42e9a922008-12-09 15:10:17 -080085 LPORT_ST_SCR,
86 LPORT_ST_READY,
87 LPORT_ST_LOGO,
88 LPORT_ST_RESET
89};
90
91enum fc_disc_event {
92 DISC_EV_NONE = 0,
93 DISC_EV_SUCCESS,
94 DISC_EV_FAILED
95};
96
Robert Love3a3b42b2009-11-03 11:47:39 -080097/**
98 * enum fc_rport_state - Remote port states
99 * @RPORT_ST_INIT: Initialized
100 * @RPORT_ST_PLOGI: Waiting for PLOGI completion
101 * @RPORT_ST_PRLI: Waiting for PRLI completion
102 * @RPORT_ST_RTV: Waiting for RTV completion
103 * @RPORT_ST_READY: Ready for use
104 * @RPORT_ST_LOGO: Remote port logout (LOGO) sent
105 * @RPORT_ST_ADISC: Discover Address sent
106 * @RPORT_ST_DELETE: Remote port being deleted
107 * @RPORT_ST_RESTART: Remote port being deleted and will restart
108*/
Robert Love42e9a922008-12-09 15:10:17 -0800109enum fc_rport_state {
Robert Love3a3b42b2009-11-03 11:47:39 -0800110 RPORT_ST_INIT,
111 RPORT_ST_PLOGI,
112 RPORT_ST_PRLI,
113 RPORT_ST_RTV,
114 RPORT_ST_READY,
115 RPORT_ST_LOGO,
116 RPORT_ST_ADISC,
117 RPORT_ST_DELETE,
118 RPORT_ST_RESTART,
Robert Love42e9a922008-12-09 15:10:17 -0800119};
120
Robert Love42e9a922008-12-09 15:10:17 -0800121/**
122 * struct fc_disc_port - temporary discovery port to hold rport identifiers
Robert Love9737e6a2009-08-25 14:02:59 -0700123 * @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
Robert Love42e9a922008-12-09 15:10:17 -0800127 */
128struct fc_disc_port {
Robert Love3a3b42b2009-11-03 11:47:39 -0800129 struct fc_lport *lp;
130 struct list_head peers;
131 struct work_struct rport_work;
132 u32 port_id;
Robert Love42e9a922008-12-09 15:10:17 -0800133};
134
Robert Love3a3b42b2009-11-03 11:47:39 -0800135/**
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
142 */
Robert Love42e9a922008-12-09 15:10:17 -0800143enum fc_rport_event {
144 RPORT_EV_NONE = 0,
Joe Eykholt4c0f62b2009-08-25 14:01:12 -0700145 RPORT_EV_READY,
Robert Love42e9a922008-12-09 15:10:17 -0800146 RPORT_EV_FAILED,
147 RPORT_EV_STOP,
148 RPORT_EV_LOGO
149};
150
Joe Eykholt9fb9d322009-08-25 14:00:50 -0700151struct fc_rport_priv;
152
Robert Love3a3b42b2009-11-03 11:47:39 -0800153/**
154 * struct fc_rport_operations - Operations for a remote port
155 * @event_callback: Function to be called for remote port events
156 */
Robert Love42e9a922008-12-09 15:10:17 -0800157struct fc_rport_operations {
Joe Eykholt9fb9d322009-08-25 14:00:50 -0700158 void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
Robert Love42e9a922008-12-09 15:10:17 -0800159 enum fc_rport_event);
160};
161
162/**
163 * struct fc_rport_libfc_priv - libfc internal information about a remote port
Robert Love3a3b42b2009-11-03 11:47:39 -0800164 * @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)
Joe Eykholt9e9d0452009-08-25 14:01:18 -0700169 */
170struct fc_rport_libfc_priv {
171 struct fc_lport *local_port;
172 enum fc_rport_state rp_state;
173 u16 flags;
174 #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
175 #define FC_RP_FLAGS_RETRY (1 << 1)
176 unsigned int e_d_tov;
177 unsigned int r_a_tov;
178};
179
180/**
Robert Love3a3b42b2009-11-03 11:47:39 -0800181 * struct fc_rport_priv - libfc remote port and discovery info
182 * @local_port: The associated local port
183 * @rport: The FC transport remote port
184 * @kref: Reference counter
185 * @rp_state: Enumeration that tracks progress of PLOGI, PRLI,
186 * and RTV exchanges
187 * @ids: The remote port identifiers and roles
188 * @flags: REC and RETRY supported flags
189 * @max_seq: Maximum number of concurrent sequences
190 * @disc_id: The discovery identifier
191 * @maxframe_size: The maximum frame size
192 * @retries: The retry count for the current state
193 * @e_d_tov: Error detect timeout value (in msec)
194 * @r_a_tov: Resource allocation timeout value (in msec)
195 * @rp_mutex: The mutex that protects the remote port
196 * @retry_work: Handle for retries
197 * @event_callback: Callback when READY, FAILED or LOGO states complete
Robert Love42e9a922008-12-09 15:10:17 -0800198 */
Joe Eykholt9e9d0452009-08-25 14:01:18 -0700199struct fc_rport_priv {
Robert Love3a3b42b2009-11-03 11:47:39 -0800200 struct fc_lport *local_port;
201 struct fc_rport *rport;
202 struct kref kref;
203 enum fc_rport_state rp_state;
Joe Eykholtf211fa52009-08-25 14:01:01 -0700204 struct fc_rport_identifiers ids;
Robert Love3a3b42b2009-11-03 11:47:39 -0800205 u16 flags;
206 u16 max_seq;
207 u16 disc_id;
208 u16 maxframe_size;
209 unsigned int retries;
210 unsigned int e_d_tov;
211 unsigned int r_a_tov;
212 struct mutex rp_mutex;
213 struct delayed_work retry_work;
214 enum fc_rport_event event;
215 struct fc_rport_operations *ops;
216 struct list_head peers;
217 struct work_struct event_work;
218 u32 supported_classes;
Robert Love42e9a922008-12-09 15:10:17 -0800219};
220
Robert Love3a3b42b2009-11-03 11:47:39 -0800221/**
222 * struct fcoe_dev_stats - fcoe stats structure
223 * @SecondsSinceLastReset: Seconds since the last reset
224 * @TxFrames: Number of transmitted frames
225 * @TxWords: Number of transmitted words
226 * @RxFrames: Number of received frames
227 * @RxWords: Number of received words
228 * @ErrorFrames: Number of received error frames
229 * @DumpedFrames: Number of dumped frames
230 * @LinkFailureCount: Number of link failures
231 * @LossOfSignalCount: Number for signal losses
232 * @InvalidTxWordCount: Number of invalid transmitted words
233 * @InvalidCRCCount: Number of invalid CRCs
234 * @InputRequests: Number of input requests
235 * @OutputRequests: Number of output requests
236 * @ControlRequests: Number of control requests
237 * @InputMegabytes: Number of received megabytes
238 * @OutputMegabytes: Number of transmitted megabytes
Yi Zou6580bbd2009-11-20 14:54:52 -0800239 * @VLinkFailureCount: Number of virtual link failures
240 * @MissDiscAdvCount: Number of missing FIP discovery advertisement
Robert Love42e9a922008-12-09 15:10:17 -0800241 */
242struct fcoe_dev_stats {
243 u64 SecondsSinceLastReset;
244 u64 TxFrames;
245 u64 TxWords;
246 u64 RxFrames;
247 u64 RxWords;
248 u64 ErrorFrames;
249 u64 DumpedFrames;
250 u64 LinkFailureCount;
251 u64 LossOfSignalCount;
252 u64 InvalidTxWordCount;
253 u64 InvalidCRCCount;
254 u64 InputRequests;
255 u64 OutputRequests;
256 u64 ControlRequests;
257 u64 InputMegabytes;
258 u64 OutputMegabytes;
Yi Zou6580bbd2009-11-20 14:54:52 -0800259 u64 VLinkFailureCount;
260 u64 MissDiscAdvCount;
Robert Love42e9a922008-12-09 15:10:17 -0800261};
262
Robert Love3a3b42b2009-11-03 11:47:39 -0800263/**
264 * struct fc_seq_els_data - ELS data used for passing ELS specific responses
265 * @fp: The ELS frame
266 * @reason: The reason for rejection
267 * @explan: The explaination of the rejection
268 *
269 * Mainly used by the exchange manager layer.
Robert Love42e9a922008-12-09 15:10:17 -0800270 */
271struct fc_seq_els_data {
272 struct fc_frame *fp;
273 enum fc_els_rjt_reason reason;
274 enum fc_els_rjt_explan explan;
275};
276
Robert Love3a3b42b2009-11-03 11:47:39 -0800277/**
278 * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request)
279 * @lp: The associated local port
280 * @state: The state of the I/O
281 * @tgt_flags: Target's flags
282 * @ref_cnt: Reference count
283 * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the
284 * host_lock if both are to be held at the same time)
285 * @cmd: The SCSI command (set and clear with the host_lock held)
286 * @list: Tracks queued commands (accessed with the host_lock held)
287 * @timer: The command timer
288 * @tm_done: Completion indicator
289 * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies)
290 * @start_time: Timestamp indicating the start of the I/O (in jiffies)
291 * @end_time: Timestamp indicating the end of the I/O (in jiffies)
292 * @last_pkt_time: Timestamp of the last frame received (in jiffies)
293 * @data_len: The length of the data
294 * @cdb_cmd: The CDB command
295 * @xfer_len: The transfer length
296 * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange
297 * will be set here if DDP was setup)
298 * @xfer_contig_end: The offset into the buffer if the buffer is contiguous
299 * (Tx and Rx)
300 * @max_payload: The maximum payload size (in bytes)
301 * @io_status: SCSI result (upper 24 bits)
302 * @cdb_status: CDB status
303 * @status_code: FCP I/O status
304 * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun)
305 * @req_flags: Request flags (bit 0: read bit:1 write)
306 * @scsi_resid: SCSI residule length
307 * @rport: The remote port that the SCSI command is targeted at
308 * @seq_ptr: The sequence that will carry the SCSI command
309 * @recov_retry: Number of recovery retries
310 * @recov_seq: The sequence for REC or SRR
Robert Love42e9a922008-12-09 15:10:17 -0800311 */
312struct fc_fcp_pkt {
Robert Love3a3b42b2009-11-03 11:47:39 -0800313 /* Housekeeping information */
314 struct fc_lport *lp;
315 u16 state;
316 u16 tgt_flags;
317 atomic_t ref_cnt;
318 spinlock_t scsi_pkt_lock;
319
320 /* SCSI I/O related information */
321 struct scsi_cmnd *cmd;
322 struct list_head list;
323
324 /* Timeout related information */
325 struct timer_list timer;
Robert Love42e9a922008-12-09 15:10:17 -0800326 struct completion tm_done;
Robert Love3a3b42b2009-11-03 11:47:39 -0800327 int wait_for_comp;
328 unsigned long start_time;
329 unsigned long end_time;
330 unsigned long last_pkt_time;
Robert Love42e9a922008-12-09 15:10:17 -0800331
Robert Love3a3b42b2009-11-03 11:47:39 -0800332 /* SCSI command and data transfer information */
333 u32 data_len;
Robert Love42e9a922008-12-09 15:10:17 -0800334
Robert Love3a3b42b2009-11-03 11:47:39 -0800335 /* Transport related veriables */
336 struct fcp_cmnd cdb_cmd;
337 size_t xfer_len;
338 u16 xfer_ddp;
339 u32 xfer_contig_end;
340 u16 max_payload;
Robert Love42e9a922008-12-09 15:10:17 -0800341
Robert Love3a3b42b2009-11-03 11:47:39 -0800342 /* SCSI/FCP return status */
343 u32 io_status;
344 u8 cdb_status;
345 u8 status_code;
346 u8 scsi_comp_flags;
347 u32 req_flags;
348 u32 scsi_resid;
349
350 /* Associated structures */
351 struct fc_rport *rport;
352 struct fc_seq *seq_ptr;
353
354 /* Error Processing information */
355 u8 recov_retry;
356 struct fc_seq *recov_seq;
Robert Love42e9a922008-12-09 15:10:17 -0800357};
358
359/*
360 * Structure and function definitions for managing Fibre Channel Exchanges
361 * and Sequences
362 *
363 * fc_exch holds state for one exchange and links to its active sequence.
364 *
365 * fc_seq holds the state for an individual sequence.
366 */
367
368struct fc_exch_mgr;
Vasu Dev96316092009-07-29 17:05:00 -0700369struct fc_exch_mgr_anchor;
Robert Love3a3b42b2009-11-03 11:47:39 -0800370extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
Robert Love42e9a922008-12-09 15:10:17 -0800371
Robert Love3a3b42b2009-11-03 11:47:39 -0800372/**
373 * struct fc_seq - FC sequence
374 * @id: The sequence ID
375 * @ssb_stat: Status flags for the sequence status block (SSB)
376 * @cnt: Number of frames sent so far
377 * @rec_data: FC-4 value for REC
Robert Love42e9a922008-12-09 15:10:17 -0800378 */
379struct fc_seq {
Robert Love3a3b42b2009-11-03 11:47:39 -0800380 u8 id;
381 u16 ssb_stat;
382 u16 cnt;
383 u32 rec_data;
Robert Love42e9a922008-12-09 15:10:17 -0800384};
385
386#define FC_EX_DONE (1 << 0) /* ep is completed */
387#define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
388
Robert Love3a3b42b2009-11-03 11:47:39 -0800389/**
390 * struct fc_exch - Fibre Channel Exchange
391 * @em: Exchange manager
392 * @pool: Exchange pool
393 * @state: The exchange's state
394 * @xid: The exchange ID
395 * @ex_list: Handle used by the EM to track free exchanges
396 * @ex_lock: Lock that protects the exchange
397 * @ex_refcnt: Reference count
398 * @timeout_work: Handle for timeout handler
399 * @lp: The local port that this exchange is on
400 * @oxid: Originator's exchange ID
401 * @rxid: Responder's exchange ID
402 * @oid: Originator's FCID
403 * @sid: Source FCID
404 * @did: Destination FCID
405 * @esb_stat: ESB exchange status
406 * @r_a_tov: Resouce allocation time out value (in msecs)
407 * @seq_id: The next sequence ID to use
408 * @f_ctl: F_CTL flags for the sequence
409 * @fh_type: The frame type
410 * @class: The class of service
411 * @seq: The sequence in use on this exchange
412 * @resp: Callback for responses on this exchange
413 * @destructor: Called when destroying the exchange
414 * @arg: Passed as a void pointer to the resp() callback
Robert Love42e9a922008-12-09 15:10:17 -0800415 *
416 * Locking notes: The ex_lock protects following items:
417 * state, esb_stat, f_ctl, seq.ssb_stat
418 * seq_id
419 * sequence allocation
420 */
421struct fc_exch {
Robert Love3a3b42b2009-11-03 11:47:39 -0800422 struct fc_exch_mgr *em;
423 struct fc_exch_pool *pool;
424 u32 state;
425 u16 xid;
426 struct list_head ex_list;
427 spinlock_t ex_lock;
428 atomic_t ex_refcnt;
429 struct delayed_work timeout_work;
430 struct fc_lport *lp;
431 u16 oxid;
432 u16 rxid;
433 u32 oid;
434 u32 sid;
435 u32 did;
436 u32 esb_stat;
437 u32 r_a_tov;
438 u8 seq_id;
439 u32 f_ctl;
440 u8 fh_type;
441 enum fc_class class;
442 struct fc_seq seq;
443
444 void (*resp)(struct fc_seq *, struct fc_frame *, void *);
445 void *arg;
446
447 void (*destructor)(struct fc_seq *, void *);
448
Robert Love42e9a922008-12-09 15:10:17 -0800449};
450#define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
451
Robert Love42e9a922008-12-09 15:10:17 -0800452
Robert Love3a3b42b2009-11-03 11:47:39 -0800453struct libfc_function_template {
Robert Love42e9a922008-12-09 15:10:17 -0800454 /*
455 * Interface to send a FC frame
Robert Love0ae4d4a2009-02-27 10:55:39 -0800456 *
457 * STATUS: REQUIRED
Robert Love42e9a922008-12-09 15:10:17 -0800458 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800459 int (*frame_send)(struct fc_lport *, struct fc_frame *);
Robert Love42e9a922008-12-09 15:10:17 -0800460
Robert Love42e9a922008-12-09 15:10:17 -0800461 /*
Robert Love0ae4d4a2009-02-27 10:55:39 -0800462 * Interface to send ELS/CT frames
463 *
464 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800465 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800466 struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did,
467 struct fc_frame *, unsigned int op,
Robert Love42e9a922008-12-09 15:10:17 -0800468 void (*resp)(struct fc_seq *,
Robert Love3a3b42b2009-11-03 11:47:39 -0800469 struct fc_frame *, void *arg),
Robert Love42e9a922008-12-09 15:10:17 -0800470 void *arg, u32 timer_msec);
Robert Love42e9a922008-12-09 15:10:17 -0800471
472 /*
473 * Send the FC frame payload using a new exchange and sequence.
474 *
Robert Love42e9a922008-12-09 15:10:17 -0800475 * The exchange response handler is set in this routine to resp()
476 * function pointer. It can be called in two scenarios: if a timeout
477 * occurs or if a response frame is received for the exchange. The
478 * fc_frame pointer in response handler will also indicate timeout
479 * as error using IS_ERR related macros.
480 *
481 * The exchange destructor handler is also set in this routine.
482 * The destructor handler is invoked by EM layer when exchange
483 * is about to free, this can be used by caller to free its
484 * resources along with exchange free.
485 *
486 * The arg is passed back to resp and destructor handler.
487 *
488 * The timeout value (in msec) for an exchange is set if non zero
489 * timer_msec argument is specified. The timer is canceled when
490 * it fires or when the exchange is done. The exchange timeout handler
491 * is registered by EM layer.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800492 *
493 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800494 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800495 struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *,
496 void (*resp)(struct fc_seq *,
497 struct fc_frame *,
498 void *),
499 void (*destructor)(struct fc_seq *,
500 void *),
501 void *, unsigned int timer_msec);
Robert Love42e9a922008-12-09 15:10:17 -0800502
503 /*
Yi Zoub277d2a2009-02-27 14:07:21 -0800504 * Sets up the DDP context for a given exchange id on the given
505 * scatterlist if LLD supports DDP for large receive.
506 *
507 * STATUS: OPTIONAL
508 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800509 int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *,
510 unsigned int);
Yi Zoub277d2a2009-02-27 14:07:21 -0800511 /*
512 * Completes the DDP transfer and returns the length of data DDPed
513 * for the given exchange id.
514 *
515 * STATUS: OPTIONAL
516 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800517 int (*ddp_done)(struct fc_lport *, u16);
Yi Zoub277d2a2009-02-27 14:07:21 -0800518 /*
Yi Zoub84056b2009-11-20 14:55:19 -0800519 * Allow LLD to fill its own Link Error Status Block
520 *
521 * STATUS: OPTIONAL
522 */
523 void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb);
524 /*
Robert Love0ae4d4a2009-02-27 10:55:39 -0800525 * Send a frame using an existing sequence and exchange.
526 *
527 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800528 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800529 int (*seq_send)(struct fc_lport *, struct fc_seq *,
530 struct fc_frame *);
Robert Love42e9a922008-12-09 15:10:17 -0800531
532 /*
Robert Love0ae4d4a2009-02-27 10:55:39 -0800533 * Send an ELS response using infomation from a previous
534 * exchange and sequence.
535 *
536 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800537 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800538 void (*seq_els_rsp_send)(struct fc_seq *, enum fc_els_cmd,
539 struct fc_seq_els_data *);
Robert Love42e9a922008-12-09 15:10:17 -0800540
541 /*
542 * Abort an exchange and sequence. Generally called because of a
543 * exchange timeout or an abort from the upper layer.
544 *
545 * A timer_msec can be specified for abort timeout, if non-zero
546 * timer_msec value is specified then exchange resp handler
547 * will be called with timeout error if no response to abort.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800548 *
549 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800550 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800551 int (*seq_exch_abort)(const struct fc_seq *,
Robert Love42e9a922008-12-09 15:10:17 -0800552 unsigned int timer_msec);
553
554 /*
555 * Indicate that an exchange/sequence tuple is complete and the memory
556 * allocated for the related objects may be freed.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800557 *
558 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800559 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800560 void (*exch_done)(struct fc_seq *);
Robert Love42e9a922008-12-09 15:10:17 -0800561
562 /*
Robert Love42e9a922008-12-09 15:10:17 -0800563 * Start a new sequence on the same exchange/sequence tuple.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800564 *
565 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800566 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800567 struct fc_seq *(*seq_start_next)(struct fc_seq *);
Robert Love42e9a922008-12-09 15:10:17 -0800568
569 /*
570 * Reset an exchange manager, completing all sequences and exchanges.
571 * If s_id is non-zero, reset only exchanges originating from that FID.
572 * If d_id is non-zero, reset only exchanges sending to that FID.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800573 *
574 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800575 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800576 void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
Robert Love42e9a922008-12-09 15:10:17 -0800577
Robert Love0ae4d4a2009-02-27 10:55:39 -0800578 /*
579 * Flush the rport work queue. Generally used before shutdown.
580 *
581 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800582 */
Robert Love0ae4d4a2009-02-27 10:55:39 -0800583 void (*rport_flush_queue)(void);
Robert Love42e9a922008-12-09 15:10:17 -0800584
585 /*
Robert Love0ae4d4a2009-02-27 10:55:39 -0800586 * Receive a frame for a local port.
587 *
588 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800589 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800590 void (*lport_recv)(struct fc_lport *, struct fc_seq *,
591 struct fc_frame *);
Robert Love42e9a922008-12-09 15:10:17 -0800592
Robert Love0ae4d4a2009-02-27 10:55:39 -0800593 /*
594 * Reset the local port.
595 *
596 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800597 */
Robert Love0ae4d4a2009-02-27 10:55:39 -0800598 int (*lport_reset)(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800599
600 /*
Joe Eykholt093bb6a2009-11-03 11:49:05 -0800601 * Set the local port FC_ID.
602 *
603 * This may be provided by the LLD to allow it to be
604 * notified when the local port is assigned a FC-ID.
605 *
606 * The frame, if non-NULL, is the incoming frame with the
607 * FLOGI LS_ACC or FLOGI, and may contain the granted MAC
608 * address for the LLD. The frame pointer may be NULL if
609 * no MAC is associated with this assignment (LOGO or PLOGI).
610 *
611 * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid.
612 *
613 * Note: this is called with the local port mutex held.
614 *
615 * STATUS: OPTIONAL
616 */
617 void (*lport_set_port_id)(struct fc_lport *, u32 port_id,
618 struct fc_frame *);
619
620 /*
Robert Love9737e6a2009-08-25 14:02:59 -0700621 * Create a remote port with a given port ID
622 *
623 * STATUS: OPTIONAL
Robert Love5101ff92009-02-27 10:55:18 -0800624 */
Robert Love9737e6a2009-08-25 14:02:59 -0700625 struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32);
Robert Love5101ff92009-02-27 10:55:18 -0800626
627 /*
Robert Love42e9a922008-12-09 15:10:17 -0800628 * Initiates the RP state machine. It is called from the LP module.
629 * This function will issue the following commands to the N_Port
630 * identified by the FC ID provided.
631 *
632 * - PLOGI
633 * - PRLI
634 * - RTV
Robert Love0ae4d4a2009-02-27 10:55:39 -0800635 *
636 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800637 */
Joe Eykholt9fb9d322009-08-25 14:00:50 -0700638 int (*rport_login)(struct fc_rport_priv *);
Robert Love42e9a922008-12-09 15:10:17 -0800639
640 /*
641 * Logoff, and remove the rport from the transport if
642 * it had been added. This will send a LOGO to the target.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800643 *
644 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800645 */
Joe Eykholt9fb9d322009-08-25 14:00:50 -0700646 int (*rport_logoff)(struct fc_rport_priv *);
Robert Love42e9a922008-12-09 15:10:17 -0800647
648 /*
649 * Recieve a request from a remote port.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800650 *
651 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800652 */
653 void (*rport_recv_req)(struct fc_seq *, struct fc_frame *,
Joe Eykholt131203a2009-08-25 14:03:10 -0700654 struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800655
Robert Love0ae4d4a2009-02-27 10:55:39 -0800656 /*
657 * lookup an rport by it's port ID.
658 *
659 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800660 */
Joe Eykholt9fb9d322009-08-25 14:00:50 -0700661 struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32);
Robert Love42e9a922008-12-09 15:10:17 -0800662
663 /*
Joe Eykholtf211fa52009-08-25 14:01:01 -0700664 * Destroy an rport after final kref_put().
665 * The argument is a pointer to the kref inside the fc_rport_priv.
666 */
667 void (*rport_destroy)(struct kref *);
668
669 /*
Robert Love42e9a922008-12-09 15:10:17 -0800670 * Send a fcp cmd from fsp pkt.
671 * Called with the SCSI host lock unlocked and irqs disabled.
672 *
673 * The resp handler is called when FCP_RSP received.
674 *
Robert Love0ae4d4a2009-02-27 10:55:39 -0800675 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800676 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800677 int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
678 void (*resp)(struct fc_seq *, struct fc_frame *,
679 void *));
Robert Love42e9a922008-12-09 15:10:17 -0800680
681 /*
Robert Love0ae4d4a2009-02-27 10:55:39 -0800682 * Cleanup the FCP layer, used durring link down and reset
683 *
684 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800685 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800686 void (*fcp_cleanup)(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800687
688 /*
689 * Abort all I/O on a local port
Robert Love0ae4d4a2009-02-27 10:55:39 -0800690 *
691 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800692 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800693 void (*fcp_abort_io)(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800694
Robert Love0ae4d4a2009-02-27 10:55:39 -0800695 /*
696 * Receive a request for the discovery layer.
697 *
698 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800699 */
Robert Love3a3b42b2009-11-03 11:47:39 -0800700 void (*disc_recv_req)(struct fc_seq *, struct fc_frame *,
701 struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800702
703 /*
704 * Start discovery for a local port.
Robert Love0ae4d4a2009-02-27 10:55:39 -0800705 *
706 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800707 */
708 void (*disc_start)(void (*disc_callback)(struct fc_lport *,
709 enum fc_disc_event),
710 struct fc_lport *);
711
712 /*
713 * Stop discovery for a given lport. This will remove
714 * all discovered rports
Robert Love0ae4d4a2009-02-27 10:55:39 -0800715 *
716 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800717 */
718 void (*disc_stop) (struct fc_lport *);
719
720 /*
721 * Stop discovery for a given lport. This will block
722 * until all discovered rports are deleted from the
723 * FC transport class
Robert Love0ae4d4a2009-02-27 10:55:39 -0800724 *
725 * STATUS: OPTIONAL
Robert Love42e9a922008-12-09 15:10:17 -0800726 */
727 void (*disc_stop_final) (struct fc_lport *);
728};
729
Robert Love3a3b42b2009-11-03 11:47:39 -0800730/**
731 * struct fc_disc - Discovery context
732 * @retry_count: Number of retries
733 * @pending: 1 if discovery is pending, 0 if not
734 * @requesting: 1 if discovery has been requested, 0 if not
735 * @seq_count: Number of sequences used for discovery
736 * @buf_len: Length of the discovery buffer
737 * @disc_id: Discovery ID
738 * @rports: List of discovered remote ports
739 * @lport: The local port that discovery is for
740 * @disc_mutex: Mutex that protects the discovery context
741 * @partial_buf: Partial name buffer (if names are returned
742 * in multiple frames)
743 * @disc_work: handle for delayed work context
744 * @disc_callback: Callback routine called when discovery completes
745 */
Robert Love42e9a922008-12-09 15:10:17 -0800746struct fc_disc {
Robert Love3a3b42b2009-11-03 11:47:39 -0800747 unsigned char retry_count;
748 unsigned char pending;
749 unsigned char requested;
750 unsigned short seq_count;
751 unsigned char buf_len;
752 u16 disc_id;
753
754 struct list_head rports;
755 struct fc_lport *lport;
756 struct mutex disc_mutex;
757 struct fc_gpn_ft_resp partial_buf;
758 struct delayed_work disc_work;
Robert Love42e9a922008-12-09 15:10:17 -0800759
760 void (*disc_callback)(struct fc_lport *,
761 enum fc_disc_event);
Robert Love42e9a922008-12-09 15:10:17 -0800762};
763
Robert Love3a3b42b2009-11-03 11:47:39 -0800764/**
765 * struct fc_lport - Local port
766 * @host: The SCSI host associated with a local port
767 * @ema_list: Exchange manager anchor list
768 * @dns_rdata: The directory server remote port
769 * @ptp_rdata: Point to point remote port
770 * @scsi_priv: FCP layer internal data
771 * @disc: Discovery context
772 * @vports: Child vports if N_Port
773 * @vport: Parent vport if VN_Port
774 * @tt: Libfc function template
775 * @link_up: Link state (1 = link up, 0 = link down)
776 * @qfull: Queue state (1 queue is full, 0 queue is not full)
777 * @state: Identifies the state
778 * @boot_time: Timestamp indicating when the local port came online
779 * @host_stats: SCSI host statistics
780 * @dev_stats: FCoE device stats (TODO: libfc should not be
781 * FCoE aware)
782 * @retry_count: Number of retries in the current state
Robert Love7b2787e2010-05-07 15:18:41 -0700783 * @port_id: FC Port ID
Robert Love3a3b42b2009-11-03 11:47:39 -0800784 * @wwpn: World Wide Port Name
785 * @wwnn: World Wide Node Name
786 * @service_params: Common service parameters
787 * @e_d_tov: Error detection timeout value
788 * @r_a_tov: Resouce allocation timeout value
789 * @rnid_gen: RNID information
790 * @sg_supp: Indicates if scatter gather is supported
791 * @seq_offload: Indicates if sequence offload is supported
792 * @crc_offload: Indicates if CRC offload is supported
793 * @lro_enabled: Indicates if large receive offload is supported
794 * @does_npiv: Supports multiple vports
795 * @npiv_enabled: Switch/fabric allows NPIV
796 * @mfs: The maximum Fibre Channel payload size
797 * @max_retry_count: The maximum retry attempts
798 * @max_rport_retry_count: The maximum remote port retry attempts
799 * @lro_xid: The maximum XID for LRO
800 * @lso_max: The maximum large offload send size
801 * @fcts: FC-4 type mask
802 * @lp_mutex: Mutex to protect the local port
803 * @list: Handle for list of local ports
804 * @retry_work: Handle to local port for delayed retry context
805 */
Robert Love42e9a922008-12-09 15:10:17 -0800806struct fc_lport {
Robert Love42e9a922008-12-09 15:10:17 -0800807 /* Associations */
Robert Love3a3b42b2009-11-03 11:47:39 -0800808 struct Scsi_Host *host;
809 struct list_head ema_list;
810 struct fc_rport_priv *dns_rdata;
811 struct fc_rport_priv *ptp_rdata;
812 void *scsi_priv;
813 struct fc_disc disc;
814
815 /* Virtual port information */
816 struct list_head vports;
817 struct fc_vport *vport;
Robert Love42e9a922008-12-09 15:10:17 -0800818
819 /* Operational Information */
820 struct libfc_function_template tt;
Robert Love3a3b42b2009-11-03 11:47:39 -0800821 u8 link_up;
822 u8 qfull;
823 enum fc_lport_state state;
824 unsigned long boot_time;
825 struct fc_host_statistics host_stats;
826 struct fcoe_dev_stats *dev_stats;
827 u8 retry_count;
Robert Love42e9a922008-12-09 15:10:17 -0800828
Robert Love3a3b42b2009-11-03 11:47:39 -0800829 /* Fabric information */
Robert Love7b2787e2010-05-07 15:18:41 -0700830 u32 port_id;
Robert Love3a3b42b2009-11-03 11:47:39 -0800831 u64 wwpn;
832 u64 wwnn;
833 unsigned int service_params;
834 unsigned int e_d_tov;
835 unsigned int r_a_tov;
836 struct fc_els_rnid_gen rnid_gen;
Robert Love42e9a922008-12-09 15:10:17 -0800837
838 /* Capabilities */
Robert Love3a3b42b2009-11-03 11:47:39 -0800839 u32 sg_supp:1;
840 u32 seq_offload:1;
841 u32 crc_offload:1;
842 u32 lro_enabled:1;
843 u32 does_npiv:1;
844 u32 npiv_enabled:1;
845 u32 mfs;
846 u8 max_retry_count;
847 u8 max_rport_retry_count;
848 u16 link_speed;
849 u16 link_supported_speeds;
850 u16 lro_xid;
851 unsigned int lso_max;
852 struct fc_ns_fts fcts;
Robert Love42e9a922008-12-09 15:10:17 -0800853
854 /* Miscellaneous */
Robert Love3a3b42b2009-11-03 11:47:39 -0800855 struct mutex lp_mutex;
856 struct list_head list;
857 struct delayed_work retry_work;
Robert Love42e9a922008-12-09 15:10:17 -0800858};
859
Robert Love34f42a02009-02-27 10:55:45 -0800860/*
Robert Love42e9a922008-12-09 15:10:17 -0800861 * FC_LPORT HELPER FUNCTIONS
862 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -0800863
864/**
865 * fc_lport_test_ready() - Determine if a local port is in the READY state
866 * @lport: The local port to test
867 */
868static inline int fc_lport_test_ready(struct fc_lport *lport)
Robert Love42e9a922008-12-09 15:10:17 -0800869{
Robert Love3a3b42b2009-11-03 11:47:39 -0800870 return lport->state == LPORT_ST_READY;
Robert Love42e9a922008-12-09 15:10:17 -0800871}
872
Robert Love3a3b42b2009-11-03 11:47:39 -0800873/**
874 * fc_set_wwnn() - Set the World Wide Node Name of a local port
875 * @lport: The local port whose WWNN is to be set
876 * @wwnn: The new WWNN
877 */
878static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
Robert Love42e9a922008-12-09 15:10:17 -0800879{
Robert Love3a3b42b2009-11-03 11:47:39 -0800880 lport->wwnn = wwnn;
Robert Love42e9a922008-12-09 15:10:17 -0800881}
882
Robert Love3a3b42b2009-11-03 11:47:39 -0800883/**
884 * fc_set_wwpn() - Set the World Wide Port Name of a local port
885 * @lport: The local port whose WWPN is to be set
886 * @wwnn: The new WWPN
887 */
888static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn)
Robert Love42e9a922008-12-09 15:10:17 -0800889{
Robert Love3a3b42b2009-11-03 11:47:39 -0800890 lport->wwpn = wwnn;
Robert Love42e9a922008-12-09 15:10:17 -0800891}
892
Robert Love3a3b42b2009-11-03 11:47:39 -0800893/**
894 * fc_lport_state_enter() - Change a local port's state
895 * @lport: The local port whose state is to change
896 * @state: The new state
897 */
898static inline void fc_lport_state_enter(struct fc_lport *lport,
Robert Love42e9a922008-12-09 15:10:17 -0800899 enum fc_lport_state state)
900{
Robert Love3a3b42b2009-11-03 11:47:39 -0800901 if (state != lport->state)
902 lport->retry_count = 0;
903 lport->state = state;
Robert Love42e9a922008-12-09 15:10:17 -0800904}
905
Robert Love3a3b42b2009-11-03 11:47:39 -0800906/**
907 * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
908 * @lport: The local port whose statistics are to be initialized
909 */
910static inline int fc_lport_init_stats(struct fc_lport *lport)
Robert Love582b45b2009-03-31 15:51:50 -0700911{
Robert Love3a3b42b2009-11-03 11:47:39 -0800912 lport->dev_stats = alloc_percpu(struct fcoe_dev_stats);
913 if (!lport->dev_stats)
Robert Love582b45b2009-03-31 15:51:50 -0700914 return -ENOMEM;
915 return 0;
916}
917
Robert Love3a3b42b2009-11-03 11:47:39 -0800918/**
919 * fc_lport_free_stats() - Free memory for a local port's statistics
920 * @lport: The local port whose statistics are to be freed
921 */
922static inline void fc_lport_free_stats(struct fc_lport *lport)
Robert Love582b45b2009-03-31 15:51:50 -0700923{
Robert Love3a3b42b2009-11-03 11:47:39 -0800924 free_percpu(lport->dev_stats);
Vasu Deva0a25da2009-03-17 11:42:29 -0700925}
926
927/**
Robert Love3a3b42b2009-11-03 11:47:39 -0800928 * lport_priv() - Return the private data from a local port
929 * @lport: The local port whose private data is to be retreived
930 */
931static inline void *lport_priv(const struct fc_lport *lport)
932{
933 return (void *)(lport + 1);
934}
935
936/**
937 * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
938 * LLD private data
939 * @sht: The SCSI host template
940 * @priv_size: Size of private data
Vasu Deva0a25da2009-03-17 11:42:29 -0700941 *
Chris Leech86221962009-11-03 11:46:08 -0800942 * Returns: libfc lport
Vasu Deva0a25da2009-03-17 11:42:29 -0700943 */
Chris Leech86221962009-11-03 11:46:08 -0800944static inline struct fc_lport *
Vasu Deva0a25da2009-03-17 11:42:29 -0700945libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
946{
Chris Leech86221962009-11-03 11:46:08 -0800947 struct fc_lport *lport;
948 struct Scsi_Host *shost;
949
950 shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
951 if (!shost)
952 return NULL;
953 lport = shost_priv(shost);
954 lport->host = shost;
955 INIT_LIST_HEAD(&lport->ema_list);
Chris Leech174e1eb2009-11-03 11:46:14 -0800956 INIT_LIST_HEAD(&lport->vports);
Chris Leech86221962009-11-03 11:46:08 -0800957 return lport;
Vasu Deva0a25da2009-03-17 11:42:29 -0700958}
Robert Love42e9a922008-12-09 15:10:17 -0800959
Robert Love34f42a02009-02-27 10:55:45 -0800960/*
Robert Love3a3b42b2009-11-03 11:47:39 -0800961 * FC_FCP HELPER FUNCTIONS
962 *****************************/
963static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
964{
965 if (fsp && fsp->cmd)
966 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
967 return false;
968}
969
970/*
Robert Love42e9a922008-12-09 15:10:17 -0800971 * LOCAL PORT LAYER
972 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -0800973int fc_lport_init(struct fc_lport *);
974int fc_lport_destroy(struct fc_lport *);
975int fc_fabric_logoff(struct fc_lport *);
976int fc_fabric_login(struct fc_lport *);
Chris Leech8faecdd2009-11-03 11:46:19 -0800977void __fc_linkup(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800978void fc_linkup(struct fc_lport *);
Chris Leech8faecdd2009-11-03 11:46:19 -0800979void __fc_linkdown(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800980void fc_linkdown(struct fc_lport *);
Robert Love3a3b42b2009-11-03 11:47:39 -0800981void fc_vport_setlink(struct fc_lport *);
982void fc_vports_linkchange(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800983int fc_lport_config(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -0800984int fc_lport_reset(struct fc_lport *);
Robert Love3a3b42b2009-11-03 11:47:39 -0800985int fc_set_mfs(struct fc_lport *, u32 mfs);
986struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
987struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
988int fc_lport_bsg_request(struct fc_bsg_job *);
Steve Maa51ab392009-11-03 11:47:34 -0800989
990/*
Robert Love42e9a922008-12-09 15:10:17 -0800991 * REMOTE PORT LAYER
992 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -0800993int fc_rport_init(struct fc_lport *);
994void fc_rport_terminate_io(struct fc_rport *);
Robert Love42e9a922008-12-09 15:10:17 -0800995
Robert Love34f42a02009-02-27 10:55:45 -0800996/*
Robert Love42e9a922008-12-09 15:10:17 -0800997 * DISCOVERY LAYER
998 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -0800999int fc_disc_init(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -08001000
Robert Love34f42a02009-02-27 10:55:45 -08001001/*
Robert Love3a3b42b2009-11-03 11:47:39 -08001002 * FCP LAYER
Robert Love42e9a922008-12-09 15:10:17 -08001003 *****************************/
Robert Love42e9a922008-12-09 15:10:17 -08001004int fc_fcp_init(struct fc_lport *);
Robert Love42e9a922008-12-09 15:10:17 -08001005void fc_fcp_destroy(struct fc_lport *);
1006
Robert Love34f42a02009-02-27 10:55:45 -08001007/*
Robert Love3a3b42b2009-11-03 11:47:39 -08001008 * SCSI INTERACTION LAYER
1009 *****************************/
1010int fc_queuecommand(struct scsi_cmnd *,
1011 void (*done)(struct scsi_cmnd *));
1012int fc_eh_abort(struct scsi_cmnd *);
1013int fc_eh_device_reset(struct scsi_cmnd *);
1014int fc_eh_host_reset(struct scsi_cmnd *);
1015int fc_slave_alloc(struct scsi_device *);
1016int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason);
1017int fc_change_queue_type(struct scsi_device *, int tag_type);
1018
1019/*
Robert Love42e9a922008-12-09 15:10:17 -08001020 * ELS/CT interface
1021 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -08001022int fc_elsct_init(struct fc_lport *);
1023struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
1024 struct fc_frame *,
Chris Leech11b56182009-11-03 11:46:29 -08001025 unsigned int op,
1026 void (*resp)(struct fc_seq *,
Robert Love3a3b42b2009-11-03 11:47:39 -08001027 struct fc_frame *,
Chris Leech11b56182009-11-03 11:46:29 -08001028 void *arg),
1029 void *arg, u32 timer_msec);
1030void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
1031void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
Robert Love42e9a922008-12-09 15:10:17 -08001032
1033
Robert Love34f42a02009-02-27 10:55:45 -08001034/*
Robert Love42e9a922008-12-09 15:10:17 -08001035 * EXCHANGE MANAGER LAYER
1036 *****************************/
Robert Love3a3b42b2009-11-03 11:47:39 -08001037int fc_exch_init(struct fc_lport *);
1038struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
1039 struct fc_exch_mgr *,
Vasu Dev96316092009-07-29 17:05:00 -07001040 bool (*match)(struct fc_frame *));
Robert Love3a3b42b2009-11-03 11:47:39 -08001041void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
Chris Leech174e1eb2009-11-03 11:46:14 -08001042int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
Robert Love3a3b42b2009-11-03 11:47:39 -08001043struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
1044 u16 min_xid, u16 max_xid,
Vasu Dev52ff8782009-07-29 17:05:10 -07001045 bool (*match)(struct fc_frame *));
Robert Love3a3b42b2009-11-03 11:47:39 -08001046void fc_exch_mgr_free(struct fc_lport *);
1047void fc_exch_recv(struct fc_lport *, struct fc_frame *);
Abhijeet Joglekar1f6ff362009-02-27 10:54:35 -08001048void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
Robert Love42e9a922008-12-09 15:10:17 -08001049
1050/*
1051 * Functions for fc_functions_template
1052 */
Robert Love3a3b42b2009-11-03 11:47:39 -08001053void fc_get_host_speed(struct Scsi_Host *);
Robert Love3a3b42b2009-11-03 11:47:39 -08001054void fc_get_host_port_state(struct Scsi_Host *);
1055void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
Robert Love42e9a922008-12-09 15:10:17 -08001056struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1057
Robert Love42e9a922008-12-09 15:10:17 -08001058#endif /* _LIBFC_H_ */