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42e9a92f RL |
1 | /* |
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> | |
582b45bc | 25 | #include <linux/percpu.h> |
42e9a92f RL |
26 | |
27 | #include <scsi/scsi_transport.h> | |
28 | #include <scsi/scsi_transport_fc.h> | |
29 | ||
30 | #include <scsi/fc/fc_fcp.h> | |
31 | #include <scsi/fc/fc_ns.h> | |
32 | #include <scsi/fc/fc_els.h> | |
33 | #include <scsi/fc/fc_gs.h> | |
34 | ||
35 | #include <scsi/fc_frame.h> | |
36 | ||
7414705e RL |
37 | #define FC_LIBFC_LOGGING 0x01 /* General logging, not categorized */ |
38 | #define FC_LPORT_LOGGING 0x02 /* lport layer logging */ | |
39 | #define FC_DISC_LOGGING 0x04 /* discovery layer logging */ | |
40 | #define FC_RPORT_LOGGING 0x08 /* rport layer logging */ | |
41 | #define FC_FCP_LOGGING 0x10 /* I/O path logging */ | |
42 | #define FC_EM_LOGGING 0x20 /* Exchange Manager logging */ | |
43 | #define FC_EXCH_LOGGING 0x40 /* Exchange/Sequence logging */ | |
44 | #define FC_SCSI_LOGGING 0x80 /* SCSI logging (mostly error handling) */ | |
45 | ||
46 | extern unsigned int fc_debug_logging; | |
47 | ||
48 | #define FC_CHECK_LOGGING(LEVEL, CMD) \ | |
49 | do { \ | |
50 | if (unlikely(fc_debug_logging & LEVEL)) \ | |
51 | do { \ | |
52 | CMD; \ | |
53 | } while (0); \ | |
beb29a6d | 54 | } while (0) |
7414705e RL |
55 | |
56 | #define FC_LIBFC_DBG(fmt, args...) \ | |
57 | FC_CHECK_LOGGING(FC_LIBFC_LOGGING, \ | |
beb29a6d | 58 | printk(KERN_INFO "libfc: " fmt, ##args)) |
7414705e RL |
59 | |
60 | #define FC_LPORT_DBG(lport, fmt, args...) \ | |
61 | FC_CHECK_LOGGING(FC_LPORT_LOGGING, \ | |
7f74549f JE |
62 | printk(KERN_INFO "host%u: lport %6x: " fmt, \ |
63 | (lport)->host->host_no, \ | |
64 | fc_host_port_id((lport)->host), ##args)) | |
7414705e RL |
65 | |
66 | #define FC_DISC_DBG(disc, fmt, args...) \ | |
67 | FC_CHECK_LOGGING(FC_DISC_LOGGING, \ | |
7f74549f JE |
68 | printk(KERN_INFO "host%u: disc: " fmt, \ |
69 | (disc)->lport->host->host_no, \ | |
beb29a6d | 70 | ##args)) |
7414705e | 71 | |
7f74549f JE |
72 | #define FC_RPORT_ID_DBG(lport, port_id, fmt, args...) \ |
73 | FC_CHECK_LOGGING(FC_RPORT_LOGGING, \ | |
74 | printk(KERN_INFO "host%u: rport %6x: " fmt, \ | |
75 | (lport)->host->host_no, \ | |
76 | (port_id), ##args)) | |
77 | ||
9fb9d328 | 78 | #define FC_RPORT_DBG(rdata, fmt, args...) \ |
f211fa51 | 79 | FC_RPORT_ID_DBG((rdata)->local_port, (rdata)->ids.port_id, fmt, ##args) |
7414705e RL |
80 | |
81 | #define FC_FCP_DBG(pkt, fmt, args...) \ | |
82 | FC_CHECK_LOGGING(FC_FCP_LOGGING, \ | |
7f74549f JE |
83 | printk(KERN_INFO "host%u: fcp: %6x: " fmt, \ |
84 | (pkt)->lp->host->host_no, \ | |
beb29a6d | 85 | pkt->rport->port_id, ##args)) |
7414705e | 86 | |
7414705e RL |
87 | #define FC_EXCH_DBG(exch, fmt, args...) \ |
88 | FC_CHECK_LOGGING(FC_EXCH_LOGGING, \ | |
7f74549f JE |
89 | printk(KERN_INFO "host%u: xid %4x: " fmt, \ |
90 | (exch)->lp->host->host_no, \ | |
beb29a6d | 91 | exch->xid, ##args)) |
7414705e RL |
92 | |
93 | #define FC_SCSI_DBG(lport, fmt, args...) \ | |
94 | FC_CHECK_LOGGING(FC_SCSI_LOGGING, \ | |
7f74549f JE |
95 | printk(KERN_INFO "host%u: scsi: " fmt, \ |
96 | (lport)->host->host_no, ##args)) | |
42e9a92f RL |
97 | |
98 | /* | |
99 | * libfc error codes | |
100 | */ | |
101 | #define FC_NO_ERR 0 /* no error */ | |
102 | #define FC_EX_TIMEOUT 1 /* Exchange timeout */ | |
103 | #define FC_EX_CLOSED 2 /* Exchange closed */ | |
104 | ||
105 | /* some helpful macros */ | |
106 | ||
107 | #define ntohll(x) be64_to_cpu(x) | |
108 | #define htonll(x) cpu_to_be64(x) | |
109 | ||
110 | #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2])) | |
111 | ||
112 | #define hton24(p, v) do { \ | |
113 | p[0] = (((v) >> 16) & 0xFF); \ | |
114 | p[1] = (((v) >> 8) & 0xFF); \ | |
115 | p[2] = ((v) & 0xFF); \ | |
116 | } while (0) | |
117 | ||
118 | /* | |
119 | * FC HBA status | |
120 | */ | |
42e9a92f | 121 | enum fc_lport_state { |
b1d9fd55 | 122 | LPORT_ST_DISABLED = 0, |
42e9a92f RL |
123 | LPORT_ST_FLOGI, |
124 | LPORT_ST_DNS, | |
125 | LPORT_ST_RPN_ID, | |
126 | LPORT_ST_RFT_ID, | |
127 | LPORT_ST_SCR, | |
128 | LPORT_ST_READY, | |
129 | LPORT_ST_LOGO, | |
130 | LPORT_ST_RESET | |
131 | }; | |
132 | ||
133 | enum fc_disc_event { | |
134 | DISC_EV_NONE = 0, | |
135 | DISC_EV_SUCCESS, | |
136 | DISC_EV_FAILED | |
137 | }; | |
138 | ||
139 | enum fc_rport_state { | |
42e9a92f RL |
140 | RPORT_ST_INIT, /* initialized */ |
141 | RPORT_ST_PLOGI, /* waiting for PLOGI completion */ | |
142 | RPORT_ST_PRLI, /* waiting for PRLI completion */ | |
143 | RPORT_ST_RTV, /* waiting for RTV completion */ | |
144 | RPORT_ST_READY, /* ready for use */ | |
145 | RPORT_ST_LOGO, /* port logout sent */ | |
370c3bd0 | 146 | RPORT_ST_ADISC, /* Discover Address sent */ |
14194054 | 147 | RPORT_ST_DELETE, /* port being deleted */ |
42e9a92f RL |
148 | }; |
149 | ||
42e9a92f RL |
150 | /** |
151 | * struct fc_disc_port - temporary discovery port to hold rport identifiers | |
9737e6a7 RL |
152 | * @lp: Fibre Channel host port instance |
153 | * @peers: Node for list management during discovery and RSCN processing | |
154 | * @rport_work: Work struct for starting the rport state machine | |
155 | * @port_id: Port ID of the discovered port | |
42e9a92f RL |
156 | */ |
157 | struct fc_disc_port { | |
158 | struct fc_lport *lp; | |
159 | struct list_head peers; | |
42e9a92f | 160 | struct work_struct rport_work; |
9737e6a7 | 161 | u32 port_id; |
42e9a92f RL |
162 | }; |
163 | ||
164 | enum fc_rport_event { | |
165 | RPORT_EV_NONE = 0, | |
4c0f62b5 | 166 | RPORT_EV_READY, |
42e9a92f RL |
167 | RPORT_EV_FAILED, |
168 | RPORT_EV_STOP, | |
169 | RPORT_EV_LOGO | |
170 | }; | |
171 | ||
9fb9d328 JE |
172 | struct fc_rport_priv; |
173 | ||
42e9a92f | 174 | struct fc_rport_operations { |
9fb9d328 | 175 | void (*event_callback)(struct fc_lport *, struct fc_rport_priv *, |
42e9a92f RL |
176 | enum fc_rport_event); |
177 | }; | |
178 | ||
179 | /** | |
180 | * struct fc_rport_libfc_priv - libfc internal information about a remote port | |
181 | * @local_port: Fibre Channel host port instance | |
9e9d0452 JE |
182 | * @rp_state: indicates READY for I/O or DELETE when blocked. |
183 | * @flags: REC and RETRY supported flags | |
184 | * @e_d_tov: error detect timeout value (in msec) | |
185 | * @r_a_tov: resource allocation timeout value (in msec) | |
186 | */ | |
187 | struct fc_rport_libfc_priv { | |
188 | struct fc_lport *local_port; | |
189 | enum fc_rport_state rp_state; | |
190 | u16 flags; | |
191 | #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0) | |
192 | #define FC_RP_FLAGS_RETRY (1 << 1) | |
193 | unsigned int e_d_tov; | |
194 | unsigned int r_a_tov; | |
195 | }; | |
196 | ||
197 | /** | |
198 | * struct fc_rport_priv - libfc rport and discovery info about a remote port | |
199 | * @local_port: Fibre Channel host port instance | |
f211fa51 JE |
200 | * @rport: transport remote port |
201 | * @kref: reference counter | |
42e9a92f | 202 | * @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges |
f211fa51 | 203 | * @ids: remote port identifiers and roles |
42e9a92f RL |
204 | * @flags: REC and RETRY supported flags |
205 | * @max_seq: maximum number of concurrent sequences | |
0f6c6149 | 206 | * @disc_id: discovery identifier |
f211fa51 | 207 | * @maxframe_size: maximum frame size |
42e9a92f RL |
208 | * @retries: retry count in current state |
209 | * @e_d_tov: error detect timeout value (in msec) | |
210 | * @r_a_tov: resource allocation timeout value (in msec) | |
211 | * @rp_mutex: mutex protects rport | |
212 | * @retry_work: | |
213 | * @event_callback: Callback for rport READY, FAILED or LOGO | |
214 | */ | |
9e9d0452 | 215 | struct fc_rport_priv { |
42e9a92f | 216 | struct fc_lport *local_port; |
f211fa51 JE |
217 | struct fc_rport *rport; |
218 | struct kref kref; | |
42e9a92f | 219 | enum fc_rport_state rp_state; |
f211fa51 | 220 | struct fc_rport_identifiers ids; |
42e9a92f | 221 | u16 flags; |
42e9a92f | 222 | u16 max_seq; |
0f6c6149 | 223 | u16 disc_id; |
f211fa51 | 224 | u16 maxframe_size; |
42e9a92f RL |
225 | unsigned int retries; |
226 | unsigned int e_d_tov; | |
227 | unsigned int r_a_tov; | |
42e9a92f RL |
228 | struct mutex rp_mutex; |
229 | struct delayed_work retry_work; | |
230 | enum fc_rport_event event; | |
231 | struct fc_rport_operations *ops; | |
232 | struct list_head peers; | |
233 | struct work_struct event_work; | |
f211fa51 | 234 | u32 supported_classes; |
42e9a92f RL |
235 | }; |
236 | ||
42e9a92f RL |
237 | /* |
238 | * fcoe stats structure | |
239 | */ | |
240 | struct fcoe_dev_stats { | |
241 | u64 SecondsSinceLastReset; | |
242 | u64 TxFrames; | |
243 | u64 TxWords; | |
244 | u64 RxFrames; | |
245 | u64 RxWords; | |
246 | u64 ErrorFrames; | |
247 | u64 DumpedFrames; | |
248 | u64 LinkFailureCount; | |
249 | u64 LossOfSignalCount; | |
250 | u64 InvalidTxWordCount; | |
251 | u64 InvalidCRCCount; | |
252 | u64 InputRequests; | |
253 | u64 OutputRequests; | |
254 | u64 ControlRequests; | |
255 | u64 InputMegabytes; | |
256 | u64 OutputMegabytes; | |
257 | }; | |
258 | ||
259 | /* | |
260 | * els data is used for passing ELS respone specific | |
261 | * data to send ELS response mainly using infomation | |
262 | * in exchange and sequence in EM layer. | |
263 | */ | |
264 | struct fc_seq_els_data { | |
265 | struct fc_frame *fp; | |
266 | enum fc_els_rjt_reason reason; | |
267 | enum fc_els_rjt_explan explan; | |
268 | }; | |
269 | ||
270 | /* | |
271 | * FCP request structure, one for each scsi cmd request | |
272 | */ | |
273 | struct fc_fcp_pkt { | |
274 | /* | |
275 | * housekeeping stuff | |
276 | */ | |
277 | struct fc_lport *lp; /* handle to hba struct */ | |
278 | u16 state; /* scsi_pkt state state */ | |
279 | u16 tgt_flags; /* target flags */ | |
280 | atomic_t ref_cnt; /* fcp pkt ref count */ | |
281 | spinlock_t scsi_pkt_lock; /* Must be taken before the host lock | |
282 | * if both are held at the same time */ | |
283 | /* | |
284 | * SCSI I/O related stuff | |
285 | */ | |
286 | struct scsi_cmnd *cmd; /* scsi command pointer. set/clear | |
287 | * under host lock */ | |
288 | struct list_head list; /* tracks queued commands. access under | |
289 | * host lock */ | |
290 | /* | |
291 | * timeout related stuff | |
292 | */ | |
293 | struct timer_list timer; /* command timer */ | |
294 | struct completion tm_done; | |
295 | int wait_for_comp; | |
296 | unsigned long start_time; /* start jiffie */ | |
297 | unsigned long end_time; /* end jiffie */ | |
298 | unsigned long last_pkt_time; /* jiffies of last frame received */ | |
299 | ||
300 | /* | |
301 | * scsi cmd and data transfer information | |
302 | */ | |
303 | u32 data_len; | |
304 | /* | |
305 | * transport related veriables | |
306 | */ | |
307 | struct fcp_cmnd cdb_cmd; | |
308 | size_t xfer_len; | |
b277d2aa | 309 | u16 xfer_ddp; /* this xfer is ddped */ |
42e9a92f RL |
310 | u32 xfer_contig_end; /* offset of end of contiguous xfer */ |
311 | u16 max_payload; /* max payload size in bytes */ | |
312 | ||
313 | /* | |
314 | * scsi/fcp return status | |
315 | */ | |
316 | u32 io_status; /* SCSI result upper 24 bits */ | |
317 | u8 cdb_status; | |
318 | u8 status_code; /* FCP I/O status */ | |
319 | /* bit 3 Underrun bit 2: overrun */ | |
320 | u8 scsi_comp_flags; | |
321 | u32 req_flags; /* bit 0: read bit:1 write */ | |
322 | u32 scsi_resid; /* residule length */ | |
323 | ||
324 | struct fc_rport *rport; /* remote port pointer */ | |
325 | struct fc_seq *seq_ptr; /* current sequence pointer */ | |
326 | /* | |
327 | * Error Processing | |
328 | */ | |
329 | u8 recov_retry; /* count of recovery retries */ | |
330 | struct fc_seq *recov_seq; /* sequence for REC or SRR */ | |
331 | }; | |
b277d2aa YZ |
332 | /* |
333 | * FC_FCP HELPER FUNCTIONS | |
334 | *****************************/ | |
335 | static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp) | |
336 | { | |
337 | if (fsp && fsp->cmd) | |
338 | return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE; | |
339 | return false; | |
340 | } | |
42e9a92f RL |
341 | |
342 | /* | |
343 | * Structure and function definitions for managing Fibre Channel Exchanges | |
344 | * and Sequences | |
345 | * | |
346 | * fc_exch holds state for one exchange and links to its active sequence. | |
347 | * | |
348 | * fc_seq holds the state for an individual sequence. | |
349 | */ | |
350 | ||
351 | struct fc_exch_mgr; | |
96316099 | 352 | struct fc_exch_mgr_anchor; |
e4bc50be | 353 | extern u16 fc_cpu_mask; /* cpu mask for possible cpus */ |
42e9a92f RL |
354 | |
355 | /* | |
356 | * Sequence. | |
357 | */ | |
358 | struct fc_seq { | |
359 | u8 id; /* seq ID */ | |
360 | u16 ssb_stat; /* status flags for sequence status block */ | |
361 | u16 cnt; /* frames sent so far on sequence */ | |
362 | u32 rec_data; /* FC-4 value for REC */ | |
363 | }; | |
364 | ||
365 | #define FC_EX_DONE (1 << 0) /* ep is completed */ | |
366 | #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ | |
367 | ||
368 | /* | |
369 | * Exchange. | |
370 | * | |
371 | * Locking notes: The ex_lock protects following items: | |
372 | * state, esb_stat, f_ctl, seq.ssb_stat | |
373 | * seq_id | |
374 | * sequence allocation | |
375 | */ | |
376 | struct fc_exch { | |
377 | struct fc_exch_mgr *em; /* exchange manager */ | |
b2f0091f | 378 | struct fc_exch_pool *pool; /* per cpu exches pool */ |
42e9a92f RL |
379 | u32 state; /* internal driver state */ |
380 | u16 xid; /* our exchange ID */ | |
381 | struct list_head ex_list; /* free or busy list linkage */ | |
382 | spinlock_t ex_lock; /* lock covering exchange state */ | |
383 | atomic_t ex_refcnt; /* reference counter */ | |
384 | struct delayed_work timeout_work; /* timer for upper level protocols */ | |
385 | struct fc_lport *lp; /* fc device instance */ | |
386 | u16 oxid; /* originator's exchange ID */ | |
387 | u16 rxid; /* responder's exchange ID */ | |
388 | u32 oid; /* originator's FCID */ | |
389 | u32 sid; /* source FCID */ | |
390 | u32 did; /* destination FCID */ | |
391 | u32 esb_stat; /* exchange status for ESB */ | |
392 | u32 r_a_tov; /* r_a_tov from rport (msec) */ | |
393 | u8 seq_id; /* next sequence ID to use */ | |
394 | u32 f_ctl; /* F_CTL flags for sequences */ | |
395 | u8 fh_type; /* frame type */ | |
396 | enum fc_class class; /* class of service */ | |
397 | struct fc_seq seq; /* single sequence */ | |
398 | /* | |
399 | * Handler for responses to this current exchange. | |
400 | */ | |
401 | void (*resp)(struct fc_seq *, struct fc_frame *, void *); | |
402 | void (*destructor)(struct fc_seq *, void *); | |
403 | /* | |
404 | * arg is passed as void pointer to exchange | |
405 | * resp and destructor handlers | |
406 | */ | |
407 | void *arg; | |
408 | }; | |
409 | #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) | |
410 | ||
411 | struct libfc_function_template { | |
412 | ||
42e9a92f RL |
413 | /* |
414 | * Interface to send a FC frame | |
42e9a92f | 415 | * |
0ae4d4ae | 416 | * STATUS: REQUIRED |
42e9a92f | 417 | */ |
0ae4d4ae | 418 | int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp); |
42e9a92f RL |
419 | |
420 | /* | |
0ae4d4ae RL |
421 | * Interface to send ELS/CT frames |
422 | * | |
423 | * STATUS: OPTIONAL | |
42e9a92f RL |
424 | */ |
425 | struct fc_seq *(*elsct_send)(struct fc_lport *lport, | |
a46f327a | 426 | u32 did, |
42e9a92f RL |
427 | struct fc_frame *fp, |
428 | unsigned int op, | |
429 | void (*resp)(struct fc_seq *, | |
430 | struct fc_frame *fp, | |
431 | void *arg), | |
432 | void *arg, u32 timer_msec); | |
42e9a92f RL |
433 | |
434 | /* | |
435 | * Send the FC frame payload using a new exchange and sequence. | |
436 | * | |
437 | * The frame pointer with some of the header's fields must be | |
438 | * filled before calling exch_seq_send(), those fields are, | |
439 | * | |
440 | * - routing control | |
441 | * - FC port did | |
442 | * - FC port sid | |
443 | * - FC header type | |
444 | * - frame control | |
445 | * - parameter or relative offset | |
446 | * | |
447 | * The exchange response handler is set in this routine to resp() | |
448 | * function pointer. It can be called in two scenarios: if a timeout | |
449 | * occurs or if a response frame is received for the exchange. The | |
450 | * fc_frame pointer in response handler will also indicate timeout | |
451 | * as error using IS_ERR related macros. | |
452 | * | |
453 | * The exchange destructor handler is also set in this routine. | |
454 | * The destructor handler is invoked by EM layer when exchange | |
455 | * is about to free, this can be used by caller to free its | |
456 | * resources along with exchange free. | |
457 | * | |
458 | * The arg is passed back to resp and destructor handler. | |
459 | * | |
460 | * The timeout value (in msec) for an exchange is set if non zero | |
461 | * timer_msec argument is specified. The timer is canceled when | |
462 | * it fires or when the exchange is done. The exchange timeout handler | |
463 | * is registered by EM layer. | |
0ae4d4ae RL |
464 | * |
465 | * STATUS: OPTIONAL | |
42e9a92f RL |
466 | */ |
467 | struct fc_seq *(*exch_seq_send)(struct fc_lport *lp, | |
468 | struct fc_frame *fp, | |
469 | void (*resp)(struct fc_seq *sp, | |
470 | struct fc_frame *fp, | |
471 | void *arg), | |
472 | void (*destructor)(struct fc_seq *sp, | |
473 | void *arg), | |
474 | void *arg, unsigned int timer_msec); | |
475 | ||
b277d2aa YZ |
476 | /* |
477 | * Sets up the DDP context for a given exchange id on the given | |
478 | * scatterlist if LLD supports DDP for large receive. | |
479 | * | |
480 | * STATUS: OPTIONAL | |
481 | */ | |
482 | int (*ddp_setup)(struct fc_lport *lp, u16 xid, | |
483 | struct scatterlist *sgl, unsigned int sgc); | |
484 | /* | |
485 | * Completes the DDP transfer and returns the length of data DDPed | |
486 | * for the given exchange id. | |
487 | * | |
488 | * STATUS: OPTIONAL | |
489 | */ | |
490 | int (*ddp_done)(struct fc_lport *lp, u16 xid); | |
42e9a92f | 491 | /* |
0ae4d4ae RL |
492 | * Send a frame using an existing sequence and exchange. |
493 | * | |
494 | * STATUS: OPTIONAL | |
42e9a92f RL |
495 | */ |
496 | int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp, | |
497 | struct fc_frame *fp); | |
498 | ||
499 | /* | |
0ae4d4ae RL |
500 | * Send an ELS response using infomation from a previous |
501 | * exchange and sequence. | |
502 | * | |
503 | * STATUS: OPTIONAL | |
42e9a92f RL |
504 | */ |
505 | void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd, | |
506 | struct fc_seq_els_data *els_data); | |
507 | ||
508 | /* | |
509 | * Abort an exchange and sequence. Generally called because of a | |
510 | * exchange timeout or an abort from the upper layer. | |
511 | * | |
512 | * A timer_msec can be specified for abort timeout, if non-zero | |
513 | * timer_msec value is specified then exchange resp handler | |
514 | * will be called with timeout error if no response to abort. | |
0ae4d4ae RL |
515 | * |
516 | * STATUS: OPTIONAL | |
42e9a92f RL |
517 | */ |
518 | int (*seq_exch_abort)(const struct fc_seq *req_sp, | |
519 | unsigned int timer_msec); | |
520 | ||
521 | /* | |
522 | * Indicate that an exchange/sequence tuple is complete and the memory | |
523 | * allocated for the related objects may be freed. | |
0ae4d4ae RL |
524 | * |
525 | * STATUS: OPTIONAL | |
42e9a92f RL |
526 | */ |
527 | void (*exch_done)(struct fc_seq *sp); | |
528 | ||
42e9a92f RL |
529 | /* |
530 | * Start a new sequence on the same exchange/sequence tuple. | |
0ae4d4ae RL |
531 | * |
532 | * STATUS: OPTIONAL | |
42e9a92f RL |
533 | */ |
534 | struct fc_seq *(*seq_start_next)(struct fc_seq *sp); | |
535 | ||
536 | /* | |
537 | * Reset an exchange manager, completing all sequences and exchanges. | |
538 | * If s_id is non-zero, reset only exchanges originating from that FID. | |
539 | * If d_id is non-zero, reset only exchanges sending to that FID. | |
0ae4d4ae RL |
540 | * |
541 | * STATUS: OPTIONAL | |
42e9a92f | 542 | */ |
1f6ff364 | 543 | void (*exch_mgr_reset)(struct fc_lport *, |
42e9a92f RL |
544 | u32 s_id, u32 d_id); |
545 | ||
0ae4d4ae RL |
546 | /* |
547 | * Flush the rport work queue. Generally used before shutdown. | |
548 | * | |
549 | * STATUS: OPTIONAL | |
42e9a92f | 550 | */ |
0ae4d4ae | 551 | void (*rport_flush_queue)(void); |
42e9a92f RL |
552 | |
553 | /* | |
0ae4d4ae RL |
554 | * Receive a frame for a local port. |
555 | * | |
556 | * STATUS: OPTIONAL | |
42e9a92f RL |
557 | */ |
558 | void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp, | |
559 | struct fc_frame *fp); | |
560 | ||
0ae4d4ae RL |
561 | /* |
562 | * Reset the local port. | |
563 | * | |
564 | * STATUS: OPTIONAL | |
42e9a92f | 565 | */ |
0ae4d4ae | 566 | int (*lport_reset)(struct fc_lport *); |
42e9a92f | 567 | |
5101ff99 | 568 | /* |
9737e6a7 RL |
569 | * Create a remote port with a given port ID |
570 | * | |
571 | * STATUS: OPTIONAL | |
5101ff99 | 572 | */ |
9737e6a7 | 573 | struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32); |
5101ff99 | 574 | |
42e9a92f RL |
575 | /* |
576 | * Initiates the RP state machine. It is called from the LP module. | |
577 | * This function will issue the following commands to the N_Port | |
578 | * identified by the FC ID provided. | |
579 | * | |
580 | * - PLOGI | |
581 | * - PRLI | |
582 | * - RTV | |
0ae4d4ae RL |
583 | * |
584 | * STATUS: OPTIONAL | |
42e9a92f | 585 | */ |
9fb9d328 | 586 | int (*rport_login)(struct fc_rport_priv *); |
42e9a92f RL |
587 | |
588 | /* | |
589 | * Logoff, and remove the rport from the transport if | |
590 | * it had been added. This will send a LOGO to the target. | |
0ae4d4ae RL |
591 | * |
592 | * STATUS: OPTIONAL | |
42e9a92f | 593 | */ |
9fb9d328 | 594 | int (*rport_logoff)(struct fc_rport_priv *); |
42e9a92f RL |
595 | |
596 | /* | |
597 | * Recieve a request from a remote port. | |
0ae4d4ae RL |
598 | * |
599 | * STATUS: OPTIONAL | |
42e9a92f RL |
600 | */ |
601 | void (*rport_recv_req)(struct fc_seq *, struct fc_frame *, | |
131203a1 | 602 | struct fc_lport *); |
42e9a92f | 603 | |
0ae4d4ae RL |
604 | /* |
605 | * lookup an rport by it's port ID. | |
606 | * | |
607 | * STATUS: OPTIONAL | |
42e9a92f | 608 | */ |
9fb9d328 | 609 | struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32); |
42e9a92f | 610 | |
f211fa51 JE |
611 | /* |
612 | * Destroy an rport after final kref_put(). | |
613 | * The argument is a pointer to the kref inside the fc_rport_priv. | |
614 | */ | |
615 | void (*rport_destroy)(struct kref *); | |
616 | ||
42e9a92f RL |
617 | /* |
618 | * Send a fcp cmd from fsp pkt. | |
619 | * Called with the SCSI host lock unlocked and irqs disabled. | |
620 | * | |
621 | * The resp handler is called when FCP_RSP received. | |
622 | * | |
0ae4d4ae | 623 | * STATUS: OPTIONAL |
42e9a92f RL |
624 | */ |
625 | int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp, | |
626 | void (*resp)(struct fc_seq *, struct fc_frame *fp, | |
627 | void *arg)); | |
628 | ||
629 | /* | |
0ae4d4ae RL |
630 | * Cleanup the FCP layer, used durring link down and reset |
631 | * | |
632 | * STATUS: OPTIONAL | |
42e9a92f RL |
633 | */ |
634 | void (*fcp_cleanup)(struct fc_lport *lp); | |
635 | ||
636 | /* | |
637 | * Abort all I/O on a local port | |
0ae4d4ae RL |
638 | * |
639 | * STATUS: OPTIONAL | |
42e9a92f RL |
640 | */ |
641 | void (*fcp_abort_io)(struct fc_lport *lp); | |
642 | ||
0ae4d4ae RL |
643 | /* |
644 | * Receive a request for the discovery layer. | |
645 | * | |
646 | * STATUS: OPTIONAL | |
42e9a92f | 647 | */ |
42e9a92f RL |
648 | void (*disc_recv_req)(struct fc_seq *, |
649 | struct fc_frame *, struct fc_lport *); | |
650 | ||
651 | /* | |
652 | * Start discovery for a local port. | |
0ae4d4ae RL |
653 | * |
654 | * STATUS: OPTIONAL | |
42e9a92f RL |
655 | */ |
656 | void (*disc_start)(void (*disc_callback)(struct fc_lport *, | |
657 | enum fc_disc_event), | |
658 | struct fc_lport *); | |
659 | ||
660 | /* | |
661 | * Stop discovery for a given lport. This will remove | |
662 | * all discovered rports | |
0ae4d4ae RL |
663 | * |
664 | * STATUS: OPTIONAL | |
42e9a92f RL |
665 | */ |
666 | void (*disc_stop) (struct fc_lport *); | |
667 | ||
668 | /* | |
669 | * Stop discovery for a given lport. This will block | |
670 | * until all discovered rports are deleted from the | |
671 | * FC transport class | |
0ae4d4ae RL |
672 | * |
673 | * STATUS: OPTIONAL | |
42e9a92f RL |
674 | */ |
675 | void (*disc_stop_final) (struct fc_lport *); | |
676 | }; | |
677 | ||
678 | /* information used by the discovery layer */ | |
679 | struct fc_disc { | |
680 | unsigned char retry_count; | |
42e9a92f RL |
681 | unsigned char pending; |
682 | unsigned char requested; | |
683 | unsigned short seq_count; | |
684 | unsigned char buf_len; | |
0f6c6149 | 685 | u16 disc_id; |
42e9a92f RL |
686 | |
687 | void (*disc_callback)(struct fc_lport *, | |
688 | enum fc_disc_event); | |
689 | ||
690 | struct list_head rports; | |
691 | struct fc_lport *lport; | |
692 | struct mutex disc_mutex; | |
693 | struct fc_gpn_ft_resp partial_buf; /* partial name buffer */ | |
694 | struct delayed_work disc_work; | |
695 | }; | |
696 | ||
697 | struct fc_lport { | |
698 | struct list_head list; | |
699 | ||
700 | /* Associations */ | |
701 | struct Scsi_Host *host; | |
96316099 | 702 | struct list_head ema_list; |
9fb9d328 JE |
703 | struct fc_rport_priv *dns_rp; |
704 | struct fc_rport_priv *ptp_rp; | |
42e9a92f RL |
705 | void *scsi_priv; |
706 | struct fc_disc disc; | |
707 | ||
708 | /* Operational Information */ | |
709 | struct libfc_function_template tt; | |
bc0e17f6 VD |
710 | u8 link_up; |
711 | u8 qfull; | |
42e9a92f RL |
712 | enum fc_lport_state state; |
713 | unsigned long boot_time; | |
714 | ||
715 | struct fc_host_statistics host_stats; | |
582b45bc RL |
716 | struct fcoe_dev_stats *dev_stats; |
717 | ||
42e9a92f RL |
718 | u64 wwpn; |
719 | u64 wwnn; | |
720 | u8 retry_count; | |
721 | ||
722 | /* Capabilities */ | |
723 | u32 sg_supp:1; /* scatter gather supported */ | |
724 | u32 seq_offload:1; /* seq offload supported */ | |
725 | u32 crc_offload:1; /* crc offload supported */ | |
726 | u32 lro_enabled:1; /* large receive offload */ | |
727 | u32 mfs; /* max FC payload size */ | |
728 | unsigned int service_params; | |
729 | unsigned int e_d_tov; | |
730 | unsigned int r_a_tov; | |
731 | u8 max_retry_count; | |
a3666955 | 732 | u8 max_rport_retry_count; |
42e9a92f RL |
733 | u16 link_speed; |
734 | u16 link_supported_speeds; | |
735 | u16 lro_xid; /* max xid for fcoe lro */ | |
ea1e9a9d | 736 | unsigned int lso_max; /* max large send size */ |
42e9a92f RL |
737 | struct fc_ns_fts fcts; /* FC-4 type masks */ |
738 | struct fc_els_rnid_gen rnid_gen; /* RNID information */ | |
739 | ||
740 | /* Semaphores */ | |
741 | struct mutex lp_mutex; | |
742 | ||
743 | /* Miscellaneous */ | |
744 | struct delayed_work retry_work; | |
745 | struct delayed_work disc_work; | |
746 | }; | |
747 | ||
34f42a07 | 748 | /* |
42e9a92f RL |
749 | * FC_LPORT HELPER FUNCTIONS |
750 | *****************************/ | |
42e9a92f RL |
751 | static inline int fc_lport_test_ready(struct fc_lport *lp) |
752 | { | |
753 | return lp->state == LPORT_ST_READY; | |
754 | } | |
755 | ||
756 | static inline void fc_set_wwnn(struct fc_lport *lp, u64 wwnn) | |
757 | { | |
758 | lp->wwnn = wwnn; | |
759 | } | |
760 | ||
761 | static inline void fc_set_wwpn(struct fc_lport *lp, u64 wwnn) | |
762 | { | |
763 | lp->wwpn = wwnn; | |
764 | } | |
765 | ||
766 | static inline void fc_lport_state_enter(struct fc_lport *lp, | |
767 | enum fc_lport_state state) | |
768 | { | |
769 | if (state != lp->state) | |
770 | lp->retry_count = 0; | |
771 | lp->state = state; | |
772 | } | |
773 | ||
582b45bc RL |
774 | static inline int fc_lport_init_stats(struct fc_lport *lp) |
775 | { | |
776 | /* allocate per cpu stats block */ | |
777 | lp->dev_stats = alloc_percpu(struct fcoe_dev_stats); | |
778 | if (!lp->dev_stats) | |
779 | return -ENOMEM; | |
780 | return 0; | |
781 | } | |
782 | ||
783 | static inline void fc_lport_free_stats(struct fc_lport *lp) | |
784 | { | |
785 | free_percpu(lp->dev_stats); | |
786 | } | |
787 | ||
788 | static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lp) | |
789 | { | |
790 | return per_cpu_ptr(lp->dev_stats, smp_processor_id()); | |
791 | } | |
792 | ||
a0a25da2 VD |
793 | static inline void *lport_priv(const struct fc_lport *lp) |
794 | { | |
795 | return (void *)(lp + 1); | |
796 | } | |
797 | ||
798 | /** | |
799 | * libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport | |
800 | * @sht: ptr to the scsi host templ | |
801 | * @priv_size: size of private data after fc_lport | |
802 | * | |
803 | * Returns: ptr to Scsi_Host | |
804 | */ | |
805 | static inline struct Scsi_Host * | |
806 | libfc_host_alloc(struct scsi_host_template *sht, int priv_size) | |
807 | { | |
808 | return scsi_host_alloc(sht, sizeof(struct fc_lport) + priv_size); | |
809 | } | |
42e9a92f | 810 | |
34f42a07 | 811 | /* |
42e9a92f RL |
812 | * LOCAL PORT LAYER |
813 | *****************************/ | |
814 | int fc_lport_init(struct fc_lport *lp); | |
815 | ||
816 | /* | |
817 | * Destroy the specified local port by finding and freeing all | |
818 | * fc_rports associated with it and then by freeing the fc_lport | |
819 | * itself. | |
820 | */ | |
821 | int fc_lport_destroy(struct fc_lport *lp); | |
822 | ||
823 | /* | |
824 | * Logout the specified local port from the fabric | |
825 | */ | |
826 | int fc_fabric_logoff(struct fc_lport *lp); | |
827 | ||
828 | /* | |
829 | * Initiate the LP state machine. This handler will use fc_host_attr | |
830 | * to store the FLOGI service parameters, so fc_host_attr must be | |
831 | * initialized before calling this handler. | |
832 | */ | |
833 | int fc_fabric_login(struct fc_lport *lp); | |
834 | ||
835 | /* | |
836 | * The link is up for the given local port. | |
837 | */ | |
838 | void fc_linkup(struct fc_lport *); | |
839 | ||
840 | /* | |
841 | * Link is down for the given local port. | |
842 | */ | |
843 | void fc_linkdown(struct fc_lport *); | |
844 | ||
42e9a92f RL |
845 | /* |
846 | * Configure the local port. | |
847 | */ | |
848 | int fc_lport_config(struct fc_lport *); | |
849 | ||
850 | /* | |
851 | * Reset the local port. | |
852 | */ | |
853 | int fc_lport_reset(struct fc_lport *); | |
854 | ||
855 | /* | |
856 | * Set the mfs or reset | |
857 | */ | |
858 | int fc_set_mfs(struct fc_lport *lp, u32 mfs); | |
859 | ||
860 | ||
34f42a07 | 861 | /* |
42e9a92f RL |
862 | * REMOTE PORT LAYER |
863 | *****************************/ | |
864 | int fc_rport_init(struct fc_lport *lp); | |
865 | void fc_rport_terminate_io(struct fc_rport *rp); | |
866 | ||
34f42a07 | 867 | /* |
42e9a92f RL |
868 | * DISCOVERY LAYER |
869 | *****************************/ | |
870 | int fc_disc_init(struct fc_lport *lp); | |
871 | ||
872 | ||
34f42a07 | 873 | /* |
42e9a92f RL |
874 | * SCSI LAYER |
875 | *****************************/ | |
876 | /* | |
877 | * Initialize the SCSI block of libfc | |
878 | */ | |
879 | int fc_fcp_init(struct fc_lport *); | |
880 | ||
881 | /* | |
882 | * This section provides an API which allows direct interaction | |
883 | * with the SCSI-ml. Each of these functions satisfies a function | |
884 | * pointer defined in Scsi_Host and therefore is always called | |
885 | * directly from the SCSI-ml. | |
886 | */ | |
887 | int fc_queuecommand(struct scsi_cmnd *sc_cmd, | |
888 | void (*done)(struct scsi_cmnd *)); | |
889 | ||
890 | /* | |
891 | * complete processing of a fcp packet | |
892 | * | |
893 | * This function may sleep if a fsp timer is pending. | |
894 | * The host lock must not be held by caller. | |
895 | */ | |
896 | void fc_fcp_complete(struct fc_fcp_pkt *fsp); | |
897 | ||
898 | /* | |
899 | * Send an ABTS frame to the target device. The sc_cmd argument | |
900 | * is a pointer to the SCSI command to be aborted. | |
901 | */ | |
902 | int fc_eh_abort(struct scsi_cmnd *sc_cmd); | |
903 | ||
904 | /* | |
905 | * Reset a LUN by sending send the tm cmd to the target. | |
906 | */ | |
907 | int fc_eh_device_reset(struct scsi_cmnd *sc_cmd); | |
908 | ||
909 | /* | |
910 | * Reset the host adapter. | |
911 | */ | |
912 | int fc_eh_host_reset(struct scsi_cmnd *sc_cmd); | |
913 | ||
914 | /* | |
915 | * Check rport status. | |
916 | */ | |
917 | int fc_slave_alloc(struct scsi_device *sdev); | |
918 | ||
919 | /* | |
920 | * Adjust the queue depth. | |
921 | */ | |
922 | int fc_change_queue_depth(struct scsi_device *sdev, int qdepth); | |
923 | ||
924 | /* | |
925 | * Change the tag type. | |
926 | */ | |
927 | int fc_change_queue_type(struct scsi_device *sdev, int tag_type); | |
928 | ||
929 | /* | |
930 | * Free memory pools used by the FCP layer. | |
931 | */ | |
932 | void fc_fcp_destroy(struct fc_lport *); | |
933 | ||
b277d2aa YZ |
934 | /* |
935 | * Set up direct-data placement for this I/O request | |
936 | */ | |
937 | void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid); | |
938 | ||
34f42a07 | 939 | /* |
42e9a92f RL |
940 | * ELS/CT interface |
941 | *****************************/ | |
942 | /* | |
943 | * Initializes ELS/CT interface | |
944 | */ | |
945 | int fc_elsct_init(struct fc_lport *lp); | |
946 | ||
947 | ||
34f42a07 | 948 | /* |
42e9a92f RL |
949 | * EXCHANGE MANAGER LAYER |
950 | *****************************/ | |
951 | /* | |
952 | * Initializes Exchange Manager related | |
953 | * function pointers in struct libfc_function_template. | |
954 | */ | |
955 | int fc_exch_init(struct fc_lport *lp); | |
956 | ||
96316099 VD |
957 | /* |
958 | * Adds Exchange Manager (EM) mp to lport. | |
959 | * | |
960 | * Adds specified mp to lport using struct fc_exch_mgr_anchor, | |
961 | * the struct fc_exch_mgr_anchor allows same EM sharing by | |
962 | * more than one lport with their specified match function, | |
963 | * the match function is used in allocating exchange from | |
964 | * added mp. | |
965 | */ | |
966 | struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport, | |
967 | struct fc_exch_mgr *mp, | |
968 | bool (*match)(struct fc_frame *)); | |
969 | ||
970 | /* | |
971 | * Deletes Exchange Manager (EM) from lport by removing | |
972 | * its anchor ema from lport. | |
973 | * | |
974 | * If removed anchor ema was the last user of its associated EM | |
975 | * then also destroys associated EM. | |
976 | */ | |
977 | void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema); | |
978 | ||
42e9a92f RL |
979 | /* |
980 | * Allocates an Exchange Manager (EM). | |
981 | * | |
982 | * The EM manages exchanges for their allocation and | |
983 | * free, also allows exchange lookup for received | |
984 | * frame. | |
985 | * | |
986 | * The class is used for initializing FC class of | |
987 | * allocated exchange from EM. | |
988 | * | |
989 | * The min_xid and max_xid will limit new | |
990 | * exchange ID (XID) within this range for | |
991 | * a new exchange. | |
992 | * The LLD may choose to have multiple EMs, | |
993 | * e.g. one EM instance per CPU receive thread in LLD. | |
42e9a92f | 994 | * |
52ff878c VD |
995 | * Specified match function is used in allocating exchanges |
996 | * from newly allocated EM. | |
42e9a92f RL |
997 | */ |
998 | struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp, | |
999 | enum fc_class class, | |
1000 | u16 min_xid, | |
52ff878c VD |
1001 | u16 max_xid, |
1002 | bool (*match)(struct fc_frame *)); | |
42e9a92f RL |
1003 | |
1004 | /* | |
52ff878c | 1005 | * Free all exchange managers of a lport. |
42e9a92f | 1006 | */ |
52ff878c | 1007 | void fc_exch_mgr_free(struct fc_lport *lport); |
42e9a92f RL |
1008 | |
1009 | /* | |
1010 | * Receive a frame on specified local port and exchange manager. | |
1011 | */ | |
52ff878c | 1012 | void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp); |
42e9a92f RL |
1013 | |
1014 | /* | |
1015 | * This function is for exch_seq_send function pointer in | |
1016 | * struct libfc_function_template, see comment block on | |
1017 | * exch_seq_send for description of this function. | |
1018 | */ | |
1019 | struct fc_seq *fc_exch_seq_send(struct fc_lport *lp, | |
1020 | struct fc_frame *fp, | |
1021 | void (*resp)(struct fc_seq *sp, | |
1022 | struct fc_frame *fp, | |
1023 | void *arg), | |
1024 | void (*destructor)(struct fc_seq *sp, | |
1025 | void *arg), | |
1026 | void *arg, u32 timer_msec); | |
1027 | ||
1028 | /* | |
1029 | * send a frame using existing sequence and exchange. | |
1030 | */ | |
1031 | int fc_seq_send(struct fc_lport *lp, struct fc_seq *sp, struct fc_frame *fp); | |
1032 | ||
1033 | /* | |
1034 | * Send ELS response using mainly infomation | |
1035 | * in exchange and sequence in EM layer. | |
1036 | */ | |
1037 | void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd, | |
1038 | struct fc_seq_els_data *els_data); | |
1039 | ||
1040 | /* | |
1041 | * This function is for seq_exch_abort function pointer in | |
1042 | * struct libfc_function_template, see comment block on | |
1043 | * seq_exch_abort for description of this function. | |
1044 | */ | |
1045 | int fc_seq_exch_abort(const struct fc_seq *req_sp, unsigned int timer_msec); | |
1046 | ||
1047 | /* | |
1048 | * Indicate that an exchange/sequence tuple is complete and the memory | |
1049 | * allocated for the related objects may be freed. | |
1050 | */ | |
1051 | void fc_exch_done(struct fc_seq *sp); | |
1052 | ||
42e9a92f RL |
1053 | /* |
1054 | * Allocate a new exchange and sequence pair. | |
42e9a92f | 1055 | */ |
52ff878c | 1056 | struct fc_exch *fc_exch_alloc(struct fc_lport *lport, struct fc_frame *fp); |
42e9a92f RL |
1057 | /* |
1058 | * Start a new sequence on the same exchange as the supplied sequence. | |
1059 | */ | |
1060 | struct fc_seq *fc_seq_start_next(struct fc_seq *sp); | |
1061 | ||
b2f0091f | 1062 | |
42e9a92f | 1063 | /* |
b2f0091f VD |
1064 | * Reset all EMs of a lport, releasing its all sequences and |
1065 | * exchanges. If sid is non-zero, then reset only exchanges | |
1066 | * we sourced from that FID. If did is non-zero, reset only | |
1067 | * exchanges destined to that FID. | |
42e9a92f | 1068 | */ |
1f6ff364 | 1069 | void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id); |
42e9a92f RL |
1070 | |
1071 | /* | |
1072 | * Functions for fc_functions_template | |
1073 | */ | |
1074 | void fc_get_host_speed(struct Scsi_Host *shost); | |
1075 | void fc_get_host_port_type(struct Scsi_Host *shost); | |
1076 | void fc_get_host_port_state(struct Scsi_Host *shost); | |
1077 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout); | |
1078 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); | |
1079 | ||
1080 | /* | |
1081 | * module setup functions. | |
1082 | */ | |
1083 | int fc_setup_exch_mgr(void); | |
1084 | void fc_destroy_exch_mgr(void); | |
1085 | int fc_setup_rport(void); | |
1086 | void fc_destroy_rport(void); | |
1087 | ||
f657d299 JE |
1088 | /* |
1089 | * Internal libfc functions. | |
1090 | */ | |
1091 | const char *fc_els_resp_type(struct fc_frame *); | |
1092 | ||
42e9a92f | 1093 | #endif /* _LIBFC_H_ */ |