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authorRobert Love <robert.w.love@intel.com>2009-11-03 14:47:39 -0500
committerJames Bottomley <James.Bottomley@suse.de>2009-12-04 13:01:07 -0500
commit3a3b42bf89a9b90ae9ed2c57fdc378e5473a0ef9 (patch)
tree6d41d669a3c7b4a3bb5219ded856251c148e7ab6 /include/scsi
parenta51ab39606042e76a483547620699530caa12c40 (diff)
[SCSI] libfc: Formatting cleanups across libfc
This patch makes a variety of cleanup changes to all libfc files. This patch adds kernel-doc headers to all functions lacking them and attempts to better format existing headers. It also add kernel-doc headers to structures. This patch ensures that the current naming conventions for local ports, remote ports and remote port private data is upheld in the following manner. struct instance (i.e. variable name) -------------------------------------------------- fc_lport lport fc_rport rport fc_rport_libfc_priv rpriv fc_rport_priv rdata I also renamed dns_rp and ptp_rp to dns_rdata and ptp_rdata respectively. I used emacs 'indent-region' and 'tabify' on all libfc files to correct spacing alignments. I feel sorry for anyone attempting to review this patch. Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'include/scsi')
-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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