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-rw-r--r--include/scsi/libfc.h994
1 files changed, 505 insertions, 489 deletions
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 54df9fe00c14..310d8a22b726 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -55,8 +55,17 @@
55 p[2] = ((v) & 0xFF); \ 55 p[2] = ((v) & 0xFF); \
56 } while (0) 56 } while (0)
57 57
58/* 58/**
59 * FC HBA status 59 * enum fc_lport_state - Local port states
60 * @LPORT_ST_DISABLED: Disabled
61 * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent
62 * @LPORT_ST_DNS: Waiting for name server remote port to become ready
63 * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent
64 * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent
65 * @LPORT_ST_SCR: State Change Register (SCR) sent
66 * @LPORT_ST_READY: Ready for use
67 * @LPORT_ST_LOGO: Local port logout (LOGO) sent
68 * @LPORT_ST_RESET: Local port reset
60 */ 69 */
61enum fc_lport_state { 70enum fc_lport_state {
62 LPORT_ST_DISABLED = 0, 71 LPORT_ST_DISABLED = 0,
@@ -78,16 +87,28 @@ enum fc_disc_event {
78 DISC_EV_FAILED 87 DISC_EV_FAILED
79}; 88};
80 89
90/**
91 * enum fc_rport_state - Remote port states
92 * @RPORT_ST_INIT: Initialized
93 * @RPORT_ST_PLOGI: Waiting for PLOGI completion
94 * @RPORT_ST_PRLI: Waiting for PRLI completion
95 * @RPORT_ST_RTV: Waiting for RTV completion
96 * @RPORT_ST_READY: Ready for use
97 * @RPORT_ST_LOGO: Remote port logout (LOGO) sent
98 * @RPORT_ST_ADISC: Discover Address sent
99 * @RPORT_ST_DELETE: Remote port being deleted
100 * @RPORT_ST_RESTART: Remote port being deleted and will restart
101*/
81enum fc_rport_state { 102enum fc_rport_state {
82 RPORT_ST_INIT, /* initialized */ 103 RPORT_ST_INIT,
83 RPORT_ST_PLOGI, /* waiting for PLOGI completion */ 104 RPORT_ST_PLOGI,
84 RPORT_ST_PRLI, /* waiting for PRLI completion */ 105 RPORT_ST_PRLI,
85 RPORT_ST_RTV, /* waiting for RTV completion */ 106 RPORT_ST_RTV,
86 RPORT_ST_READY, /* ready for use */ 107 RPORT_ST_READY,
87 RPORT_ST_LOGO, /* port logout sent */ 108 RPORT_ST_LOGO,
88 RPORT_ST_ADISC, /* Discover Address sent */ 109 RPORT_ST_ADISC,
89 RPORT_ST_DELETE, /* port being deleted */ 110 RPORT_ST_DELETE,
90 RPORT_ST_RESTART, /* remote port being deleted and will restart */ 111 RPORT_ST_RESTART,
91}; 112};
92 113
93/** 114/**
@@ -98,12 +119,20 @@ enum fc_rport_state {
98 * @port_id: Port ID of the discovered port 119 * @port_id: Port ID of the discovered port
99 */ 120 */
100struct fc_disc_port { 121struct fc_disc_port {
101 struct fc_lport *lp; 122 struct fc_lport *lp;
102 struct list_head peers; 123 struct list_head peers;
103 struct work_struct rport_work; 124 struct work_struct rport_work;
104 u32 port_id; 125 u32 port_id;
105}; 126};
106 127
128/**
129 * enum fc_rport_event - Remote port events
130 * @RPORT_EV_NONE: No event
131 * @RPORT_EV_READY: Remote port is ready for use
132 * @RPORT_EV_FAILED: State machine failed, remote port is not ready
133 * @RPORT_EV_STOP: Remote port has been stopped
134 * @RPORT_EV_LOGO: Remote port logout (LOGO) sent
135 */
107enum fc_rport_event { 136enum fc_rport_event {
108 RPORT_EV_NONE = 0, 137 RPORT_EV_NONE = 0,
109 RPORT_EV_READY, 138 RPORT_EV_READY,
@@ -114,6 +143,10 @@ enum fc_rport_event {
114 143
115struct fc_rport_priv; 144struct fc_rport_priv;
116 145
146/**
147 * struct fc_rport_operations - Operations for a remote port
148 * @event_callback: Function to be called for remote port events
149 */
117struct fc_rport_operations { 150struct fc_rport_operations {
118 void (*event_callback)(struct fc_lport *, struct fc_rport_priv *, 151 void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
119 enum fc_rport_event); 152 enum fc_rport_event);
@@ -121,11 +154,11 @@ struct fc_rport_operations {
121 154
122/** 155/**
123 * struct fc_rport_libfc_priv - libfc internal information about a remote port 156 * struct fc_rport_libfc_priv - libfc internal information about a remote port
124 * @local_port: Fibre Channel host port instance 157 * @local_port: The associated local port
125 * @rp_state: indicates READY for I/O or DELETE when blocked. 158 * @rp_state: Indicates READY for I/O or DELETE when blocked
126 * @flags: REC and RETRY supported flags 159 * @flags: REC and RETRY supported flags
127 * @e_d_tov: error detect timeout value (in msec) 160 * @e_d_tov: Error detect timeout value (in msec)
128 * @r_a_tov: resource allocation timeout value (in msec) 161 * @r_a_tov: Resource allocation timeout value (in msec)
129 */ 162 */
130struct fc_rport_libfc_priv { 163struct fc_rport_libfc_priv {
131 struct fc_lport *local_port; 164 struct fc_lport *local_port;
@@ -138,47 +171,64 @@ struct fc_rport_libfc_priv {
138}; 171};
139 172
140/** 173/**
141 * struct fc_rport_priv - libfc rport and discovery info about a remote port 174 * struct fc_rport_priv - libfc remote port and discovery info
142 * @local_port: Fibre Channel host port instance 175 * @local_port: The associated local port
143 * @rport: transport remote port 176 * @rport: The FC transport remote port
144 * @kref: reference counter 177 * @kref: Reference counter
145 * @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges 178 * @rp_state: Enumeration that tracks progress of PLOGI, PRLI,
146 * @ids: remote port identifiers and roles 179 * and RTV exchanges
147 * @flags: REC and RETRY supported flags 180 * @ids: The remote port identifiers and roles
148 * @max_seq: maximum number of concurrent sequences 181 * @flags: REC and RETRY supported flags
149 * @disc_id: discovery identifier 182 * @max_seq: Maximum number of concurrent sequences
150 * @maxframe_size: maximum frame size 183 * @disc_id: The discovery identifier
151 * @retries: retry count in current state 184 * @maxframe_size: The maximum frame size
152 * @e_d_tov: error detect timeout value (in msec) 185 * @retries: The retry count for the current state
153 * @r_a_tov: resource allocation timeout value (in msec) 186 * @e_d_tov: Error detect timeout value (in msec)
154 * @rp_mutex: mutex protects rport 187 * @r_a_tov: Resource allocation timeout value (in msec)
155 * @retry_work: 188 * @rp_mutex: The mutex that protects the remote port
156 * @event_callback: Callback for rport READY, FAILED or LOGO 189 * @retry_work: Handle for retries
190 * @event_callback: Callback when READY, FAILED or LOGO states complete
157 */ 191 */
158struct fc_rport_priv { 192struct fc_rport_priv {
159 struct fc_lport *local_port; 193 struct fc_lport *local_port;
160 struct fc_rport *rport; 194 struct fc_rport *rport;
161 struct kref kref; 195 struct kref kref;
162 enum fc_rport_state rp_state; 196 enum fc_rport_state rp_state;
163 struct fc_rport_identifiers ids; 197 struct fc_rport_identifiers ids;
164 u16 flags; 198 u16 flags;
165 u16 max_seq; 199 u16 max_seq;
166 u16 disc_id; 200 u16 disc_id;
167 u16 maxframe_size; 201 u16 maxframe_size;
168 unsigned int retries; 202 unsigned int retries;
169 unsigned int e_d_tov; 203 unsigned int e_d_tov;
170 unsigned int r_a_tov; 204 unsigned int r_a_tov;
171 struct mutex rp_mutex; 205 struct mutex rp_mutex;
172 struct delayed_work retry_work; 206 struct delayed_work retry_work;
173 enum fc_rport_event event; 207 enum fc_rport_event event;
174 struct fc_rport_operations *ops; 208 struct fc_rport_operations *ops;
175 struct list_head peers; 209 struct list_head peers;
176 struct work_struct event_work; 210 struct work_struct event_work;
177 u32 supported_classes; 211 u32 supported_classes;
178}; 212};
179 213
180/* 214/**
181 * fcoe stats structure 215 * struct fcoe_dev_stats - fcoe stats structure
216 * @SecondsSinceLastReset: Seconds since the last reset
217 * @TxFrames: Number of transmitted frames
218 * @TxWords: Number of transmitted words
219 * @RxFrames: Number of received frames
220 * @RxWords: Number of received words
221 * @ErrorFrames: Number of received error frames
222 * @DumpedFrames: Number of dumped frames
223 * @LinkFailureCount: Number of link failures
224 * @LossOfSignalCount: Number for signal losses
225 * @InvalidTxWordCount: Number of invalid transmitted words
226 * @InvalidCRCCount: Number of invalid CRCs
227 * @InputRequests: Number of input requests
228 * @OutputRequests: Number of output requests
229 * @ControlRequests: Number of control requests
230 * @InputMegabytes: Number of received megabytes
231 * @OutputMegabytes: Number of transmitted megabytes
182 */ 232 */
183struct fcoe_dev_stats { 233struct fcoe_dev_stats {
184 u64 SecondsSinceLastReset; 234 u64 SecondsSinceLastReset;
@@ -199,10 +249,13 @@ struct fcoe_dev_stats {
199 u64 OutputMegabytes; 249 u64 OutputMegabytes;
200}; 250};
201 251
202/* 252/**
203 * els data is used for passing ELS respone specific 253 * struct fc_seq_els_data - ELS data used for passing ELS specific responses
204 * data to send ELS response mainly using infomation 254 * @fp: The ELS frame
205 * in exchange and sequence in EM layer. 255 * @reason: The reason for rejection
256 * @explan: The explaination of the rejection
257 *
258 * Mainly used by the exchange manager layer.
206 */ 259 */
207struct fc_seq_els_data { 260struct fc_seq_els_data {
208 struct fc_frame *fp; 261 struct fc_frame *fp;
@@ -210,77 +263,87 @@ struct fc_seq_els_data {
210 enum fc_els_rjt_explan explan; 263 enum fc_els_rjt_explan explan;
211}; 264};
212 265
213/* 266/**
214 * FCP request structure, one for each scsi cmd request 267 * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request)
268 * @lp: The associated local port
269 * @state: The state of the I/O
270 * @tgt_flags: Target's flags
271 * @ref_cnt: Reference count
272 * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the
273 * host_lock if both are to be held at the same time)
274 * @cmd: The SCSI command (set and clear with the host_lock held)
275 * @list: Tracks queued commands (accessed with the host_lock held)
276 * @timer: The command timer
277 * @tm_done: Completion indicator
278 * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies)
279 * @start_time: Timestamp indicating the start of the I/O (in jiffies)
280 * @end_time: Timestamp indicating the end of the I/O (in jiffies)
281 * @last_pkt_time: Timestamp of the last frame received (in jiffies)
282 * @data_len: The length of the data
283 * @cdb_cmd: The CDB command
284 * @xfer_len: The transfer length
285 * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange
286 * will be set here if DDP was setup)
287 * @xfer_contig_end: The offset into the buffer if the buffer is contiguous
288 * (Tx and Rx)
289 * @max_payload: The maximum payload size (in bytes)
290 * @io_status: SCSI result (upper 24 bits)
291 * @cdb_status: CDB status
292 * @status_code: FCP I/O status
293 * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun)
294 * @req_flags: Request flags (bit 0: read bit:1 write)
295 * @scsi_resid: SCSI residule length
296 * @rport: The remote port that the SCSI command is targeted at
297 * @seq_ptr: The sequence that will carry the SCSI command
298 * @recov_retry: Number of recovery retries
299 * @recov_seq: The sequence for REC or SRR
215 */ 300 */
216struct fc_fcp_pkt { 301struct fc_fcp_pkt {
217 /* 302 /* Housekeeping information */
218 * housekeeping stuff 303 struct fc_lport *lp;
219 */ 304 u16 state;
220 struct fc_lport *lp; /* handle to hba struct */ 305 u16 tgt_flags;
221 u16 state; /* scsi_pkt state state */ 306 atomic_t ref_cnt;
222 u16 tgt_flags; /* target flags */ 307 spinlock_t scsi_pkt_lock;
223 atomic_t ref_cnt; /* fcp pkt ref count */ 308
224 spinlock_t scsi_pkt_lock; /* Must be taken before the host lock 309 /* SCSI I/O related information */
225 * if both are held at the same time */ 310 struct scsi_cmnd *cmd;
226 /* 311 struct list_head list;
227 * SCSI I/O related stuff 312
228 */ 313 /* Timeout related information */
229 struct scsi_cmnd *cmd; /* scsi command pointer. set/clear 314 struct timer_list timer;
230 * under host lock */
231 struct list_head list; /* tracks queued commands. access under
232 * host lock */
233 /*
234 * timeout related stuff
235 */
236 struct timer_list timer; /* command timer */
237 struct completion tm_done; 315 struct completion tm_done;
238 int wait_for_comp; 316 int wait_for_comp;
239 unsigned long start_time; /* start jiffie */ 317 unsigned long start_time;
240 unsigned long end_time; /* end jiffie */ 318 unsigned long end_time;
241 unsigned long last_pkt_time; /* jiffies of last frame received */ 319 unsigned long last_pkt_time;
242 320
243 /* 321 /* SCSI command and data transfer information */
244 * scsi cmd and data transfer information 322 u32 data_len;
245 */ 323
246 u32 data_len; 324 /* Transport related veriables */
247 /* 325 struct fcp_cmnd cdb_cmd;
248 * transport related veriables 326 size_t xfer_len;
249 */ 327 u16 xfer_ddp;
250 struct fcp_cmnd cdb_cmd; 328 u32 xfer_contig_end;
251 size_t xfer_len; 329 u16 max_payload;
252 u16 xfer_ddp; /* this xfer is ddped */ 330
253 u32 xfer_contig_end; /* offset of end of contiguous xfer */ 331 /* SCSI/FCP return status */
254 u16 max_payload; /* max payload size in bytes */ 332 u32 io_status;
255 333 u8 cdb_status;
256 /* 334 u8 status_code;
257 * scsi/fcp return status 335 u8 scsi_comp_flags;
258 */ 336 u32 req_flags;
259 u32 io_status; /* SCSI result upper 24 bits */ 337 u32 scsi_resid;
260 u8 cdb_status; 338
261 u8 status_code; /* FCP I/O status */ 339 /* Associated structures */
262 /* bit 3 Underrun bit 2: overrun */ 340 struct fc_rport *rport;
263 u8 scsi_comp_flags; 341 struct fc_seq *seq_ptr;
264 u32 req_flags; /* bit 0: read bit:1 write */ 342
265 u32 scsi_resid; /* residule length */ 343 /* Error Processing information */
266 344 u8 recov_retry;
267 struct fc_rport *rport; /* remote port pointer */ 345 struct fc_seq *recov_seq;
268 struct fc_seq *seq_ptr; /* current sequence pointer */
269 /*
270 * Error Processing
271 */
272 u8 recov_retry; /* count of recovery retries */
273 struct fc_seq *recov_seq; /* sequence for REC or SRR */
274}; 346};
275/*
276 * FC_FCP HELPER FUNCTIONS
277 *****************************/
278static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
279{
280 if (fsp && fsp->cmd)
281 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
282 return false;
283}
284 347
285/* 348/*
286 * Structure and function definitions for managing Fibre Channel Exchanges 349 * Structure and function definitions for managing Fibre Channel Exchanges
@@ -293,23 +356,51 @@ static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
293 356
294struct fc_exch_mgr; 357struct fc_exch_mgr;
295struct fc_exch_mgr_anchor; 358struct fc_exch_mgr_anchor;
296extern u16 fc_cpu_mask; /* cpu mask for possible cpus */ 359extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
297 360
298/* 361/**
299 * Sequence. 362 * struct fc_seq - FC sequence
363 * @id: The sequence ID
364 * @ssb_stat: Status flags for the sequence status block (SSB)
365 * @cnt: Number of frames sent so far
366 * @rec_data: FC-4 value for REC
300 */ 367 */
301struct fc_seq { 368struct fc_seq {
302 u8 id; /* seq ID */ 369 u8 id;
303 u16 ssb_stat; /* status flags for sequence status block */ 370 u16 ssb_stat;
304 u16 cnt; /* frames sent so far on sequence */ 371 u16 cnt;
305 u32 rec_data; /* FC-4 value for REC */ 372 u32 rec_data;
306}; 373};
307 374
308#define FC_EX_DONE (1 << 0) /* ep is completed */ 375#define FC_EX_DONE (1 << 0) /* ep is completed */
309#define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ 376#define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
310 377
311/* 378/**
312 * Exchange. 379 * struct fc_exch - Fibre Channel Exchange
380 * @em: Exchange manager
381 * @pool: Exchange pool
382 * @state: The exchange's state
383 * @xid: The exchange ID
384 * @ex_list: Handle used by the EM to track free exchanges
385 * @ex_lock: Lock that protects the exchange
386 * @ex_refcnt: Reference count
387 * @timeout_work: Handle for timeout handler
388 * @lp: The local port that this exchange is on
389 * @oxid: Originator's exchange ID
390 * @rxid: Responder's exchange ID
391 * @oid: Originator's FCID
392 * @sid: Source FCID
393 * @did: Destination FCID
394 * @esb_stat: ESB exchange status
395 * @r_a_tov: Resouce allocation time out value (in msecs)
396 * @seq_id: The next sequence ID to use
397 * @f_ctl: F_CTL flags for the sequence
398 * @fh_type: The frame type
399 * @class: The class of service
400 * @seq: The sequence in use on this exchange
401 * @resp: Callback for responses on this exchange
402 * @destructor: Called when destroying the exchange
403 * @arg: Passed as a void pointer to the resp() callback
313 * 404 *
314 * Locking notes: The ex_lock protects following items: 405 * Locking notes: The ex_lock protects following items:
315 * state, esb_stat, f_ctl, seq.ssb_stat 406 * state, esb_stat, f_ctl, seq.ssb_stat
@@ -317,76 +408,59 @@ struct fc_seq {
317 * sequence allocation 408 * sequence allocation
318 */ 409 */
319struct fc_exch { 410struct fc_exch {
320 struct fc_exch_mgr *em; /* exchange manager */ 411 struct fc_exch_mgr *em;
321 struct fc_exch_pool *pool; /* per cpu exches pool */ 412 struct fc_exch_pool *pool;
322 u32 state; /* internal driver state */ 413 u32 state;
323 u16 xid; /* our exchange ID */ 414 u16 xid;
324 struct list_head ex_list; /* free or busy list linkage */ 415 struct list_head ex_list;
325 spinlock_t ex_lock; /* lock covering exchange state */ 416 spinlock_t ex_lock;
326 atomic_t ex_refcnt; /* reference counter */ 417 atomic_t ex_refcnt;
327 struct delayed_work timeout_work; /* timer for upper level protocols */ 418 struct delayed_work timeout_work;
328 struct fc_lport *lp; /* fc device instance */ 419 struct fc_lport *lp;
329 u16 oxid; /* originator's exchange ID */ 420 u16 oxid;
330 u16 rxid; /* responder's exchange ID */ 421 u16 rxid;
331 u32 oid; /* originator's FCID */ 422 u32 oid;
332 u32 sid; /* source FCID */ 423 u32 sid;
333 u32 did; /* destination FCID */ 424 u32 did;
334 u32 esb_stat; /* exchange status for ESB */ 425 u32 esb_stat;
335 u32 r_a_tov; /* r_a_tov from rport (msec) */ 426 u32 r_a_tov;
336 u8 seq_id; /* next sequence ID to use */ 427 u8 seq_id;
337 u32 f_ctl; /* F_CTL flags for sequences */ 428 u32 f_ctl;
338 u8 fh_type; /* frame type */ 429 u8 fh_type;
339 enum fc_class class; /* class of service */ 430 enum fc_class class;
340 struct fc_seq seq; /* single sequence */ 431 struct fc_seq seq;
341 /* 432
342 * Handler for responses to this current exchange. 433 void (*resp)(struct fc_seq *, struct fc_frame *, void *);
343 */ 434 void *arg;
344 void (*resp)(struct fc_seq *, struct fc_frame *, void *); 435
345 void (*destructor)(struct fc_seq *, void *); 436 void (*destructor)(struct fc_seq *, void *);
346 /* 437
347 * arg is passed as void pointer to exchange
348 * resp and destructor handlers
349 */
350 void *arg;
351}; 438};
352#define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) 439#define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
353 440
354struct libfc_function_template {
355 441
442struct libfc_function_template {
356 /* 443 /*
357 * Interface to send a FC frame 444 * Interface to send a FC frame
358 * 445 *
359 * STATUS: REQUIRED 446 * STATUS: REQUIRED
360 */ 447 */
361 int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp); 448 int (*frame_send)(struct fc_lport *, struct fc_frame *);
362 449
363 /* 450 /*
364 * Interface to send ELS/CT frames 451 * Interface to send ELS/CT frames
365 * 452 *
366 * STATUS: OPTIONAL 453 * STATUS: OPTIONAL
367 */ 454 */
368 struct fc_seq *(*elsct_send)(struct fc_lport *lport, 455 struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did,
369 u32 did, 456 struct fc_frame *, unsigned int op,
370 struct fc_frame *fp,
371 unsigned int op,
372 void (*resp)(struct fc_seq *, 457 void (*resp)(struct fc_seq *,
373 struct fc_frame *fp, 458 struct fc_frame *, void *arg),
374 void *arg),
375 void *arg, u32 timer_msec); 459 void *arg, u32 timer_msec);
376 460
377 /* 461 /*
378 * Send the FC frame payload using a new exchange and sequence. 462 * Send the FC frame payload using a new exchange and sequence.
379 * 463 *
380 * The frame pointer with some of the header's fields must be
381 * filled before calling exch_seq_send(), those fields are,
382 *
383 * - routing control
384 * - FC port did
385 * - FC port sid
386 * - FC header type
387 * - frame control
388 * - parameter or relative offset
389 *
390 * The exchange response handler is set in this routine to resp() 464 * The exchange response handler is set in this routine to resp()
391 * function pointer. It can be called in two scenarios: if a timeout 465 * function pointer. It can be called in two scenarios: if a timeout
392 * occurs or if a response frame is received for the exchange. The 466 * occurs or if a response frame is received for the exchange. The
@@ -407,14 +481,13 @@ struct libfc_function_template {
407 * 481 *
408 * STATUS: OPTIONAL 482 * STATUS: OPTIONAL
409 */ 483 */
410 struct fc_seq *(*exch_seq_send)(struct fc_lport *lp, 484 struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *,
411 struct fc_frame *fp, 485 void (*resp)(struct fc_seq *,
412 void (*resp)(struct fc_seq *sp, 486 struct fc_frame *,
413 struct fc_frame *fp, 487 void *),
414 void *arg), 488 void (*destructor)(struct fc_seq *,
415 void (*destructor)(struct fc_seq *sp, 489 void *),
416 void *arg), 490 void *, unsigned int timer_msec);
417 void *arg, unsigned int timer_msec);
418 491
419 /* 492 /*
420 * Sets up the DDP context for a given exchange id on the given 493 * Sets up the DDP context for a given exchange id on the given
@@ -422,22 +495,22 @@ struct libfc_function_template {
422 * 495 *
423 * STATUS: OPTIONAL 496 * STATUS: OPTIONAL
424 */ 497 */
425 int (*ddp_setup)(struct fc_lport *lp, u16 xid, 498 int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *,
426 struct scatterlist *sgl, unsigned int sgc); 499 unsigned int);
427 /* 500 /*
428 * Completes the DDP transfer and returns the length of data DDPed 501 * Completes the DDP transfer and returns the length of data DDPed
429 * for the given exchange id. 502 * for the given exchange id.
430 * 503 *
431 * STATUS: OPTIONAL 504 * STATUS: OPTIONAL
432 */ 505 */
433 int (*ddp_done)(struct fc_lport *lp, u16 xid); 506 int (*ddp_done)(struct fc_lport *, u16);
434 /* 507 /*
435 * Send a frame using an existing sequence and exchange. 508 * Send a frame using an existing sequence and exchange.
436 * 509 *
437 * STATUS: OPTIONAL 510 * STATUS: OPTIONAL
438 */ 511 */
439 int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp, 512 int (*seq_send)(struct fc_lport *, struct fc_seq *,
440 struct fc_frame *fp); 513 struct fc_frame *);
441 514
442 /* 515 /*
443 * Send an ELS response using infomation from a previous 516 * Send an ELS response using infomation from a previous
@@ -445,8 +518,8 @@ struct libfc_function_template {
445 * 518 *
446 * STATUS: OPTIONAL 519 * STATUS: OPTIONAL
447 */ 520 */
448 void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd, 521 void (*seq_els_rsp_send)(struct fc_seq *, enum fc_els_cmd,
449 struct fc_seq_els_data *els_data); 522 struct fc_seq_els_data *);
450 523
451 /* 524 /*
452 * Abort an exchange and sequence. Generally called because of a 525 * Abort an exchange and sequence. Generally called because of a
@@ -458,7 +531,7 @@ struct libfc_function_template {
458 * 531 *
459 * STATUS: OPTIONAL 532 * STATUS: OPTIONAL
460 */ 533 */
461 int (*seq_exch_abort)(const struct fc_seq *req_sp, 534 int (*seq_exch_abort)(const struct fc_seq *,
462 unsigned int timer_msec); 535 unsigned int timer_msec);
463 536
464 /* 537 /*
@@ -467,14 +540,14 @@ struct libfc_function_template {
467 * 540 *
468 * STATUS: OPTIONAL 541 * STATUS: OPTIONAL
469 */ 542 */
470 void (*exch_done)(struct fc_seq *sp); 543 void (*exch_done)(struct fc_seq *);
471 544
472 /* 545 /*
473 * Start a new sequence on the same exchange/sequence tuple. 546 * Start a new sequence on the same exchange/sequence tuple.
474 * 547 *
475 * STATUS: OPTIONAL 548 * STATUS: OPTIONAL
476 */ 549 */
477 struct fc_seq *(*seq_start_next)(struct fc_seq *sp); 550 struct fc_seq *(*seq_start_next)(struct fc_seq *);
478 551
479 /* 552 /*
480 * Reset an exchange manager, completing all sequences and exchanges. 553 * Reset an exchange manager, completing all sequences and exchanges.
@@ -483,8 +556,7 @@ struct libfc_function_template {
483 * 556 *
484 * STATUS: OPTIONAL 557 * STATUS: OPTIONAL
485 */ 558 */
486 void (*exch_mgr_reset)(struct fc_lport *, 559 void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
487 u32 s_id, u32 d_id);
488 560
489 /* 561 /*
490 * Flush the rport work queue. Generally used before shutdown. 562 * Flush the rport work queue. Generally used before shutdown.
@@ -498,8 +570,8 @@ struct libfc_function_template {
498 * 570 *
499 * STATUS: OPTIONAL 571 * STATUS: OPTIONAL
500 */ 572 */
501 void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp, 573 void (*lport_recv)(struct fc_lport *, struct fc_seq *,
502 struct fc_frame *fp); 574 struct fc_frame *);
503 575
504 /* 576 /*
505 * Reset the local port. 577 * Reset the local port.
@@ -565,31 +637,31 @@ struct libfc_function_template {
565 * 637 *
566 * STATUS: OPTIONAL 638 * STATUS: OPTIONAL
567 */ 639 */
568 int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp, 640 int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
569 void (*resp)(struct fc_seq *, struct fc_frame *fp, 641 void (*resp)(struct fc_seq *, struct fc_frame *,
570 void *arg)); 642 void *));
571 643
572 /* 644 /*
573 * Cleanup the FCP layer, used durring link down and reset 645 * Cleanup the FCP layer, used durring link down and reset
574 * 646 *
575 * STATUS: OPTIONAL 647 * STATUS: OPTIONAL
576 */ 648 */
577 void (*fcp_cleanup)(struct fc_lport *lp); 649 void (*fcp_cleanup)(struct fc_lport *);
578 650
579 /* 651 /*
580 * Abort all I/O on a local port 652 * Abort all I/O on a local port
581 * 653 *
582 * STATUS: OPTIONAL 654 * STATUS: OPTIONAL
583 */ 655 */
584 void (*fcp_abort_io)(struct fc_lport *lp); 656 void (*fcp_abort_io)(struct fc_lport *);
585 657
586 /* 658 /*
587 * Receive a request for the discovery layer. 659 * Receive a request for the discovery layer.
588 * 660 *
589 * STATUS: OPTIONAL 661 * STATUS: OPTIONAL
590 */ 662 */
591 void (*disc_recv_req)(struct fc_seq *, 663 void (*disc_recv_req)(struct fc_seq *, struct fc_frame *,
592 struct fc_frame *, struct fc_lport *); 664 struct fc_lport *);
593 665
594 /* 666 /*
595 * Start discovery for a local port. 667 * Start discovery for a local port.
@@ -618,133 +690,224 @@ struct libfc_function_template {
618 void (*disc_stop_final) (struct fc_lport *); 690 void (*disc_stop_final) (struct fc_lport *);
619}; 691};
620 692
621/* information used by the discovery layer */ 693/**
694 * struct fc_disc - Discovery context
695 * @retry_count: Number of retries
696 * @pending: 1 if discovery is pending, 0 if not
697 * @requesting: 1 if discovery has been requested, 0 if not
698 * @seq_count: Number of sequences used for discovery
699 * @buf_len: Length of the discovery buffer
700 * @disc_id: Discovery ID
701 * @rports: List of discovered remote ports
702 * @lport: The local port that discovery is for
703 * @disc_mutex: Mutex that protects the discovery context
704 * @partial_buf: Partial name buffer (if names are returned
705 * in multiple frames)
706 * @disc_work: handle for delayed work context
707 * @disc_callback: Callback routine called when discovery completes
708 */
622struct fc_disc { 709struct fc_disc {
623 unsigned char retry_count; 710 unsigned char retry_count;
624 unsigned char pending; 711 unsigned char pending;
625 unsigned char requested; 712 unsigned char requested;
626 unsigned short seq_count; 713 unsigned short seq_count;
627 unsigned char buf_len; 714 unsigned char buf_len;
628 u16 disc_id; 715 u16 disc_id;
716
717 struct list_head rports;
718 struct fc_lport *lport;
719 struct mutex disc_mutex;
720 struct fc_gpn_ft_resp partial_buf;
721 struct delayed_work disc_work;
629 722
630 void (*disc_callback)(struct fc_lport *, 723 void (*disc_callback)(struct fc_lport *,
631 enum fc_disc_event); 724 enum fc_disc_event);
632
633 struct list_head rports;
634 struct fc_lport *lport;
635 struct mutex disc_mutex;
636 struct fc_gpn_ft_resp partial_buf; /* partial name buffer */
637 struct delayed_work disc_work;
638}; 725};
639 726
727/**
728 * struct fc_lport - Local port
729 * @host: The SCSI host associated with a local port
730 * @ema_list: Exchange manager anchor list
731 * @dns_rdata: The directory server remote port
732 * @ptp_rdata: Point to point remote port
733 * @scsi_priv: FCP layer internal data
734 * @disc: Discovery context
735 * @vports: Child vports if N_Port
736 * @vport: Parent vport if VN_Port
737 * @tt: Libfc function template
738 * @link_up: Link state (1 = link up, 0 = link down)
739 * @qfull: Queue state (1 queue is full, 0 queue is not full)
740 * @state: Identifies the state
741 * @boot_time: Timestamp indicating when the local port came online
742 * @host_stats: SCSI host statistics
743 * @dev_stats: FCoE device stats (TODO: libfc should not be
744 * FCoE aware)
745 * @retry_count: Number of retries in the current state
746 * @wwpn: World Wide Port Name
747 * @wwnn: World Wide Node Name
748 * @service_params: Common service parameters
749 * @e_d_tov: Error detection timeout value
750 * @r_a_tov: Resouce allocation timeout value
751 * @rnid_gen: RNID information
752 * @sg_supp: Indicates if scatter gather is supported
753 * @seq_offload: Indicates if sequence offload is supported
754 * @crc_offload: Indicates if CRC offload is supported
755 * @lro_enabled: Indicates if large receive offload is supported
756 * @does_npiv: Supports multiple vports
757 * @npiv_enabled: Switch/fabric allows NPIV
758 * @mfs: The maximum Fibre Channel payload size
759 * @max_retry_count: The maximum retry attempts
760 * @max_rport_retry_count: The maximum remote port retry attempts
761 * @lro_xid: The maximum XID for LRO
762 * @lso_max: The maximum large offload send size
763 * @fcts: FC-4 type mask
764 * @lp_mutex: Mutex to protect the local port
765 * @list: Handle for list of local ports
766 * @retry_work: Handle to local port for delayed retry context
767 */
640struct fc_lport { 768struct fc_lport {
641 struct list_head list;
642
643 /* Associations */ 769 /* Associations */
644 struct Scsi_Host *host; 770 struct Scsi_Host *host;
645 struct list_head ema_list; 771 struct list_head ema_list;
646 struct list_head vports; /* child vports if N_Port */ 772 struct fc_rport_priv *dns_rdata;
647 struct fc_vport *vport; /* parent vport if VN_Port */ 773 struct fc_rport_priv *ptp_rdata;
648 struct fc_rport_priv *dns_rp; 774 void *scsi_priv;
649 struct fc_rport_priv *ptp_rp; 775 struct fc_disc disc;
650 void *scsi_priv; 776
651 struct fc_disc disc; 777 /* Virtual port information */
778 struct list_head vports;
779 struct fc_vport *vport;
652 780
653 /* Operational Information */ 781 /* Operational Information */
654 struct libfc_function_template tt; 782 struct libfc_function_template tt;
655 u8 link_up; 783 u8 link_up;
656 u8 qfull; 784 u8 qfull;
657 enum fc_lport_state state; 785 enum fc_lport_state state;
658 unsigned long boot_time; 786 unsigned long boot_time;
659 787 struct fc_host_statistics host_stats;
660 struct fc_host_statistics host_stats; 788 struct fcoe_dev_stats *dev_stats;
661 struct fcoe_dev_stats *dev_stats; 789 u8 retry_count;
662 790
663 u64 wwpn; 791 /* Fabric information */
664 u64 wwnn; 792 u64 wwpn;
665 u8 retry_count; 793 u64 wwnn;
794 unsigned int service_params;
795 unsigned int e_d_tov;
796 unsigned int r_a_tov;
797 struct fc_els_rnid_gen rnid_gen;
666 798
667 /* Capabilities */ 799 /* Capabilities */
668 u32 sg_supp:1; /* scatter gather supported */ 800 u32 sg_supp:1;
669 u32 seq_offload:1; /* seq offload supported */ 801 u32 seq_offload:1;
670 u32 crc_offload:1; /* crc offload supported */ 802 u32 crc_offload:1;
671 u32 lro_enabled:1; /* large receive offload */ 803 u32 lro_enabled:1;
672 u32 does_npiv:1; /* supports multiple vports */ 804 u32 does_npiv:1;
673 u32 npiv_enabled:1; /* switch/fabric allows NPIV */ 805 u32 npiv_enabled:1;
674 u32 mfs; /* max FC payload size */ 806 u32 mfs;
675 unsigned int service_params; 807 u8 max_retry_count;
676 unsigned int e_d_tov; 808 u8 max_rport_retry_count;
677 unsigned int r_a_tov; 809 u16 link_speed;
678 u8 max_retry_count; 810 u16 link_supported_speeds;
679 u8 max_rport_retry_count; 811 u16 lro_xid;
680 u16 link_speed; 812 unsigned int lso_max;
681 u16 link_supported_speeds; 813 struct fc_ns_fts fcts;
682 u16 lro_xid; /* max xid for fcoe lro */
683 unsigned int lso_max; /* max large send size */
684 struct fc_ns_fts fcts; /* FC-4 type masks */
685 struct fc_els_rnid_gen rnid_gen; /* RNID information */
686
687 /* Semaphores */
688 struct mutex lp_mutex;
689 814
690 /* Miscellaneous */ 815 /* Miscellaneous */
691 struct delayed_work retry_work; 816 struct mutex lp_mutex;
817 struct list_head list;
818 struct delayed_work retry_work;
692}; 819};
693 820
694/* 821/*
695 * FC_LPORT HELPER FUNCTIONS 822 * FC_LPORT HELPER FUNCTIONS
696 *****************************/ 823 *****************************/
697static inline int fc_lport_test_ready(struct fc_lport *lp) 824
825/**
826 * fc_lport_test_ready() - Determine if a local port is in the READY state
827 * @lport: The local port to test
828 */
829static inline int fc_lport_test_ready(struct fc_lport *lport)
698{ 830{
699 return lp->state == LPORT_ST_READY; 831 return lport->state == LPORT_ST_READY;
700} 832}
701 833
702static inline void fc_set_wwnn(struct fc_lport *lp, u64 wwnn) 834/**
835 * fc_set_wwnn() - Set the World Wide Node Name of a local port
836 * @lport: The local port whose WWNN is to be set
837 * @wwnn: The new WWNN
838 */
839static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
703{ 840{
704 lp->wwnn = wwnn; 841 lport->wwnn = wwnn;
705} 842}
706 843
707static inline void fc_set_wwpn(struct fc_lport *lp, u64 wwnn) 844/**
845 * fc_set_wwpn() - Set the World Wide Port Name of a local port
846 * @lport: The local port whose WWPN is to be set
847 * @wwnn: The new WWPN
848 */
849static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn)
708{ 850{
709 lp->wwpn = wwnn; 851 lport->wwpn = wwnn;
710} 852}
711 853
712static inline void fc_lport_state_enter(struct fc_lport *lp, 854/**
855 * fc_lport_state_enter() - Change a local port's state
856 * @lport: The local port whose state is to change
857 * @state: The new state
858 */
859static inline void fc_lport_state_enter(struct fc_lport *lport,
713 enum fc_lport_state state) 860 enum fc_lport_state state)
714{ 861{
715 if (state != lp->state) 862 if (state != lport->state)
716 lp->retry_count = 0; 863 lport->retry_count = 0;
717 lp->state = state; 864 lport->state = state;
718} 865}
719 866
720static inline int fc_lport_init_stats(struct fc_lport *lp) 867/**
868 * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
869 * @lport: The local port whose statistics are to be initialized
870 */
871static inline int fc_lport_init_stats(struct fc_lport *lport)
721{ 872{
722 /* allocate per cpu stats block */ 873 lport->dev_stats = alloc_percpu(struct fcoe_dev_stats);
723 lp->dev_stats = alloc_percpu(struct fcoe_dev_stats); 874 if (!lport->dev_stats)
724 if (!lp->dev_stats)
725 return -ENOMEM; 875 return -ENOMEM;
726 return 0; 876 return 0;
727} 877}
728 878
729static inline void fc_lport_free_stats(struct fc_lport *lp) 879/**
880 * fc_lport_free_stats() - Free memory for a local port's statistics
881 * @lport: The local port whose statistics are to be freed
882 */
883static inline void fc_lport_free_stats(struct fc_lport *lport)
730{ 884{
731 free_percpu(lp->dev_stats); 885 free_percpu(lport->dev_stats);
732} 886}
733 887
734static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lp) 888/**
889 * fc_lport_get_stats() - Get a local port's statistics
890 * @lport: The local port whose statistics are to be retreived
891 */
892static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lport)
735{ 893{
736 return per_cpu_ptr(lp->dev_stats, smp_processor_id()); 894 return per_cpu_ptr(lport->dev_stats, smp_processor_id());
737} 895}
738 896
739static inline void *lport_priv(const struct fc_lport *lp) 897/**
898 * lport_priv() - Return the private data from a local port
899 * @lport: The local port whose private data is to be retreived
900 */
901static inline void *lport_priv(const struct fc_lport *lport)
740{ 902{
741 return (void *)(lp + 1); 903 return (void *)(lport + 1);
742} 904}
743 905
744/** 906/**
745 * libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport 907 * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
746 * @sht: ptr to the scsi host templ 908 * LLD private data
747 * @priv_size: size of private data after fc_lport 909 * @sht: The SCSI host template
910 * @priv_size: Size of private data
748 * 911 *
749 * Returns: libfc lport 912 * Returns: libfc lport
750 */ 913 */
@@ -765,156 +928,73 @@ libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
765} 928}
766 929
767/* 930/*
768 * LOCAL PORT LAYER 931 * FC_FCP HELPER FUNCTIONS
769 *****************************/ 932 *****************************/
770int fc_lport_init(struct fc_lport *lp); 933static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
771 934{
772/* 935 if (fsp && fsp->cmd)
773 * Destroy the specified local port by finding and freeing all 936 return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
774 * fc_rports associated with it and then by freeing the fc_lport 937 return false;
775 * itself. 938}
776 */
777int fc_lport_destroy(struct fc_lport *lp);
778
779/*
780 * Logout the specified local port from the fabric
781 */
782int fc_fabric_logoff(struct fc_lport *lp);
783
784/*
785 * Initiate the LP state machine. This handler will use fc_host_attr
786 * to store the FLOGI service parameters, so fc_host_attr must be
787 * initialized before calling this handler.
788 */
789int fc_fabric_login(struct fc_lport *lp);
790 939
791/* 940/*
792 * The link is up for the given local port. 941 * LOCAL PORT LAYER
793 */ 942 *****************************/
943int fc_lport_init(struct fc_lport *);
944int fc_lport_destroy(struct fc_lport *);
945int fc_fabric_logoff(struct fc_lport *);
946int fc_fabric_login(struct fc_lport *);
794void __fc_linkup(struct fc_lport *); 947void __fc_linkup(struct fc_lport *);
795void fc_linkup(struct fc_lport *); 948void fc_linkup(struct fc_lport *);
796
797/*
798 * Link is down for the given local port.
799 */
800void __fc_linkdown(struct fc_lport *); 949void __fc_linkdown(struct fc_lport *);
801void fc_linkdown(struct fc_lport *); 950void fc_linkdown(struct fc_lport *);
802 951void fc_vport_setlink(struct fc_lport *);
803/* 952void fc_vports_linkchange(struct fc_lport *);
804 * Configure the local port.
805 */
806int fc_lport_config(struct fc_lport *); 953int fc_lport_config(struct fc_lport *);
807
808/*
809 * Reset the local port.
810 */
811int fc_lport_reset(struct fc_lport *); 954int fc_lport_reset(struct fc_lport *);
812 955int fc_set_mfs(struct fc_lport *, u32 mfs);
813/* 956struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
814 * Set the mfs or reset 957struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
815 */ 958int fc_lport_bsg_request(struct fc_bsg_job *);
816int fc_set_mfs(struct fc_lport *lp, u32 mfs);
817
818/*
819 * Allocate a new lport struct for an NPIV VN_Port
820 */
821struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize);
822
823/*
824 * Find an NPIV VN_Port by port ID
825 */
826struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id);
827
828/*
829 * NPIV VN_Port link state management
830 */
831void fc_vport_setlink(struct fc_lport *vn_port);
832void fc_vports_linkchange(struct fc_lport *n_port);
833
834/*
835 * Issue fc pass-thru request via bsg interface
836 */
837int fc_lport_bsg_request(struct fc_bsg_job *job);
838
839 959
840/* 960/*
841 * REMOTE PORT LAYER 961 * REMOTE PORT LAYER
842 *****************************/ 962 *****************************/
843int fc_rport_init(struct fc_lport *lp); 963int fc_rport_init(struct fc_lport *);
844void fc_rport_terminate_io(struct fc_rport *rp); 964void fc_rport_terminate_io(struct fc_rport *);
845 965
846/* 966/*
847 * DISCOVERY LAYER 967 * DISCOVERY LAYER
848 *****************************/ 968 *****************************/
849int fc_disc_init(struct fc_lport *lp); 969int fc_disc_init(struct fc_lport *);
850
851 970
852/* 971/*
853 * SCSI LAYER 972 * FCP LAYER
854 *****************************/ 973 *****************************/
855/*
856 * Initialize the SCSI block of libfc
857 */
858int fc_fcp_init(struct fc_lport *); 974int fc_fcp_init(struct fc_lport *);
975void fc_fcp_destroy(struct fc_lport *);
859 976
860/* 977/*
861 * This section provides an API which allows direct interaction 978 * SCSI INTERACTION LAYER
862 * with the SCSI-ml. Each of these functions satisfies a function 979 *****************************/
863 * pointer defined in Scsi_Host and therefore is always called 980int fc_queuecommand(struct scsi_cmnd *,
864 * directly from the SCSI-ml.
865 */
866int fc_queuecommand(struct scsi_cmnd *sc_cmd,
867 void (*done)(struct scsi_cmnd *)); 981 void (*done)(struct scsi_cmnd *));
868 982int fc_eh_abort(struct scsi_cmnd *);
869/* 983int fc_eh_device_reset(struct scsi_cmnd *);
870 * Send an ABTS frame to the target device. The sc_cmd argument 984int fc_eh_host_reset(struct scsi_cmnd *);
871 * is a pointer to the SCSI command to be aborted. 985int fc_slave_alloc(struct scsi_device *);
872 */ 986int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason);
873int fc_eh_abort(struct scsi_cmnd *sc_cmd); 987int fc_change_queue_type(struct scsi_device *, int tag_type);
874
875/*
876 * Reset a LUN by sending send the tm cmd to the target.
877 */
878int fc_eh_device_reset(struct scsi_cmnd *sc_cmd);
879
880/*
881 * Reset the host adapter.
882 */
883int fc_eh_host_reset(struct scsi_cmnd *sc_cmd);
884
885/*
886 * Check rport status.
887 */
888int fc_slave_alloc(struct scsi_device *sdev);
889
890/*
891 * Adjust the queue depth.
892 */
893int fc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason);
894
895/*
896 * Change the tag type.
897 */
898int fc_change_queue_type(struct scsi_device *sdev, int tag_type);
899
900/*
901 * Free memory pools used by the FCP layer.
902 */
903void fc_fcp_destroy(struct fc_lport *);
904 988
905/* 989/*
906 * ELS/CT interface 990 * ELS/CT interface
907 *****************************/ 991 *****************************/
908/* 992int fc_elsct_init(struct fc_lport *);
909 * Initializes ELS/CT interface 993struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
910 */ 994 struct fc_frame *,
911int fc_elsct_init(struct fc_lport *lp);
912struct fc_seq *fc_elsct_send(struct fc_lport *lport,
913 u32 did,
914 struct fc_frame *fp,
915 unsigned int op, 995 unsigned int op,
916 void (*resp)(struct fc_seq *, 996 void (*resp)(struct fc_seq *,
917 struct fc_frame *fp, 997 struct fc_frame *,
918 void *arg), 998 void *arg),
919 void *arg, u32 timer_msec); 999 void *arg, u32 timer_msec);
920void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *); 1000void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
@@ -924,90 +1004,26 @@ void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
924/* 1004/*
925 * EXCHANGE MANAGER LAYER 1005 * EXCHANGE MANAGER LAYER
926 *****************************/ 1006 *****************************/
927/* 1007int fc_exch_init(struct fc_lport *);
928 * Initializes Exchange Manager related 1008struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
929 * function pointers in struct libfc_function_template. 1009 struct fc_exch_mgr *,
930 */
931int fc_exch_init(struct fc_lport *lp);
932
933/*
934 * Adds Exchange Manager (EM) mp to lport.
935 *
936 * Adds specified mp to lport using struct fc_exch_mgr_anchor,
937 * the struct fc_exch_mgr_anchor allows same EM sharing by
938 * more than one lport with their specified match function,
939 * the match function is used in allocating exchange from
940 * added mp.
941 */
942struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport,
943 struct fc_exch_mgr *mp,
944 bool (*match)(struct fc_frame *)); 1010 bool (*match)(struct fc_frame *));
945 1011void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
946/*
947 * Deletes Exchange Manager (EM) from lport by removing
948 * its anchor ema from lport.
949 *
950 * If removed anchor ema was the last user of its associated EM
951 * then also destroys associated EM.
952 */
953void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema);
954
955/*
956 * Clone an exchange manager list, getting reference holds for each EM.
957 * This is for use with NPIV and sharing the X_ID space between VN_Ports.
958 */
959int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst); 1012int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
960 1013struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
961/* 1014 u16 min_xid, u16 max_xid,
962 * Allocates an Exchange Manager (EM).
963 *
964 * The EM manages exchanges for their allocation and
965 * free, also allows exchange lookup for received
966 * frame.
967 *
968 * The class is used for initializing FC class of
969 * allocated exchange from EM.
970 *
971 * The min_xid and max_xid will limit new
972 * exchange ID (XID) within this range for
973 * a new exchange.
974 * The LLD may choose to have multiple EMs,
975 * e.g. one EM instance per CPU receive thread in LLD.
976 *
977 * Specified match function is used in allocating exchanges
978 * from newly allocated EM.
979 */
980struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
981 enum fc_class class,
982 u16 min_xid,
983 u16 max_xid,
984 bool (*match)(struct fc_frame *)); 1015 bool (*match)(struct fc_frame *));
985 1016void fc_exch_mgr_free(struct fc_lport *);
986/* 1017void fc_exch_recv(struct fc_lport *, struct fc_frame *);
987 * Free all exchange managers of a lport.
988 */
989void fc_exch_mgr_free(struct fc_lport *lport);
990
991/*
992 * Receive a frame on specified local port and exchange manager.
993 */
994void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp);
995
996/*
997 * Reset all EMs of a lport, releasing its all sequences and
998 * exchanges. If sid is non-zero, then reset only exchanges
999 * we sourced from that FID. If did is non-zero, reset only
1000 * exchanges destined to that FID.
1001 */
1002void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id); 1018void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
1003 1019
1004/* 1020/*
1005 * Functions for fc_functions_template 1021 * Functions for fc_functions_template
1006 */ 1022 */
1007void fc_get_host_speed(struct Scsi_Host *shost); 1023void fc_get_host_speed(struct Scsi_Host *);
1008void fc_get_host_port_type(struct Scsi_Host *shost); 1024void fc_get_host_port_type(struct Scsi_Host *);
1009void fc_get_host_port_state(struct Scsi_Host *shost); 1025void fc_get_host_port_state(struct Scsi_Host *);
1010void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout); 1026void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
1011struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); 1027struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
1012 1028
1013#endif /* _LIBFC_H_ */ 1029#endif /* _LIBFC_H_ */
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