Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright(c) 2007 Intel Corporation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | * |
| 17 | * Maintained at www.Open-FCoE.org |
| 18 | */ |
| 19 | |
| 20 | #ifndef _LIBFC_H_ |
| 21 | #define _LIBFC_H_ |
| 22 | |
| 23 | #include <linux/timer.h> |
| 24 | #include <linux/if.h> |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 25 | #include <linux/percpu.h> |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 26 | |
| 27 | #include <scsi/scsi_transport.h> |
| 28 | #include <scsi/scsi_transport_fc.h> |
Steve Ma | a51ab39 | 2009-11-03 11:47:34 -0800 | [diff] [blame^] | 29 | #include <scsi/scsi_bsg_fc.h> |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 30 | |
| 31 | #include <scsi/fc/fc_fcp.h> |
| 32 | #include <scsi/fc/fc_ns.h> |
| 33 | #include <scsi/fc/fc_els.h> |
| 34 | #include <scsi/fc/fc_gs.h> |
| 35 | |
| 36 | #include <scsi/fc_frame.h> |
| 37 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 38 | /* |
| 39 | * libfc error codes |
| 40 | */ |
| 41 | #define FC_NO_ERR 0 /* no error */ |
| 42 | #define FC_EX_TIMEOUT 1 /* Exchange timeout */ |
| 43 | #define FC_EX_CLOSED 2 /* Exchange closed */ |
| 44 | |
| 45 | /* some helpful macros */ |
| 46 | |
| 47 | #define ntohll(x) be64_to_cpu(x) |
| 48 | #define htonll(x) cpu_to_be64(x) |
| 49 | |
| 50 | #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2])) |
| 51 | |
| 52 | #define hton24(p, v) do { \ |
| 53 | p[0] = (((v) >> 16) & 0xFF); \ |
| 54 | p[1] = (((v) >> 8) & 0xFF); \ |
| 55 | p[2] = ((v) & 0xFF); \ |
| 56 | } while (0) |
| 57 | |
| 58 | /* |
| 59 | * FC HBA status |
| 60 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 61 | enum fc_lport_state { |
Joe Eykholt | b1d9fd5 | 2009-07-29 17:04:22 -0700 | [diff] [blame] | 62 | LPORT_ST_DISABLED = 0, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 63 | LPORT_ST_FLOGI, |
| 64 | LPORT_ST_DNS, |
Chris Leech | c9c7bd7 | 2009-11-03 11:46:51 -0800 | [diff] [blame] | 65 | LPORT_ST_RNN_ID, |
Chris Leech | 5baa17c | 2009-11-03 11:46:56 -0800 | [diff] [blame] | 66 | LPORT_ST_RSNN_NN, |
Chris Leech | c9866a5 | 2009-11-03 11:47:01 -0800 | [diff] [blame] | 67 | LPORT_ST_RSPN_ID, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 68 | LPORT_ST_RFT_ID, |
| 69 | LPORT_ST_SCR, |
| 70 | LPORT_ST_READY, |
| 71 | LPORT_ST_LOGO, |
| 72 | LPORT_ST_RESET |
| 73 | }; |
| 74 | |
| 75 | enum fc_disc_event { |
| 76 | DISC_EV_NONE = 0, |
| 77 | DISC_EV_SUCCESS, |
| 78 | DISC_EV_FAILED |
| 79 | }; |
| 80 | |
| 81 | enum fc_rport_state { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 82 | RPORT_ST_INIT, /* initialized */ |
| 83 | RPORT_ST_PLOGI, /* waiting for PLOGI completion */ |
| 84 | RPORT_ST_PRLI, /* waiting for PRLI completion */ |
| 85 | RPORT_ST_RTV, /* waiting for RTV completion */ |
| 86 | RPORT_ST_READY, /* ready for use */ |
| 87 | RPORT_ST_LOGO, /* port logout sent */ |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 88 | RPORT_ST_ADISC, /* Discover Address sent */ |
Joe Eykholt | 1419405 | 2009-07-29 17:04:43 -0700 | [diff] [blame] | 89 | RPORT_ST_DELETE, /* port being deleted */ |
Joe Eykholt | b4a9c7e | 2009-10-21 16:28:30 -0700 | [diff] [blame] | 90 | RPORT_ST_RESTART, /* remote port being deleted and will restart */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 91 | }; |
| 92 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 93 | /** |
| 94 | * struct fc_disc_port - temporary discovery port to hold rport identifiers |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 95 | * @lp: Fibre Channel host port instance |
| 96 | * @peers: Node for list management during discovery and RSCN processing |
| 97 | * @rport_work: Work struct for starting the rport state machine |
| 98 | * @port_id: Port ID of the discovered port |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 99 | */ |
| 100 | struct fc_disc_port { |
| 101 | struct fc_lport *lp; |
| 102 | struct list_head peers; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 103 | struct work_struct rport_work; |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 104 | u32 port_id; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 105 | }; |
| 106 | |
| 107 | enum fc_rport_event { |
| 108 | RPORT_EV_NONE = 0, |
Joe Eykholt | 4c0f62b | 2009-08-25 14:01:12 -0700 | [diff] [blame] | 109 | RPORT_EV_READY, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 110 | RPORT_EV_FAILED, |
| 111 | RPORT_EV_STOP, |
| 112 | RPORT_EV_LOGO |
| 113 | }; |
| 114 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 115 | struct fc_rport_priv; |
| 116 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 117 | struct fc_rport_operations { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 118 | void (*event_callback)(struct fc_lport *, struct fc_rport_priv *, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 119 | enum fc_rport_event); |
| 120 | }; |
| 121 | |
| 122 | /** |
| 123 | * struct fc_rport_libfc_priv - libfc internal information about a remote port |
| 124 | * @local_port: Fibre Channel host port instance |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 125 | * @rp_state: indicates READY for I/O or DELETE when blocked. |
| 126 | * @flags: REC and RETRY supported flags |
| 127 | * @e_d_tov: error detect timeout value (in msec) |
| 128 | * @r_a_tov: resource allocation timeout value (in msec) |
| 129 | */ |
| 130 | struct fc_rport_libfc_priv { |
| 131 | struct fc_lport *local_port; |
| 132 | enum fc_rport_state rp_state; |
| 133 | u16 flags; |
| 134 | #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0) |
| 135 | #define FC_RP_FLAGS_RETRY (1 << 1) |
| 136 | unsigned int e_d_tov; |
| 137 | unsigned int r_a_tov; |
| 138 | }; |
| 139 | |
| 140 | /** |
| 141 | * struct fc_rport_priv - libfc rport and discovery info about a remote port |
| 142 | * @local_port: Fibre Channel host port instance |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 143 | * @rport: transport remote port |
| 144 | * @kref: reference counter |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 145 | * @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 146 | * @ids: remote port identifiers and roles |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 147 | * @flags: REC and RETRY supported flags |
| 148 | * @max_seq: maximum number of concurrent sequences |
Joe Eykholt | 0f6c614 | 2009-08-25 14:02:11 -0700 | [diff] [blame] | 149 | * @disc_id: discovery identifier |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 150 | * @maxframe_size: maximum frame size |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 151 | * @retries: retry count in current state |
| 152 | * @e_d_tov: error detect timeout value (in msec) |
| 153 | * @r_a_tov: resource allocation timeout value (in msec) |
| 154 | * @rp_mutex: mutex protects rport |
| 155 | * @retry_work: |
| 156 | * @event_callback: Callback for rport READY, FAILED or LOGO |
| 157 | */ |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 158 | struct fc_rport_priv { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 159 | struct fc_lport *local_port; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 160 | struct fc_rport *rport; |
| 161 | struct kref kref; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 162 | enum fc_rport_state rp_state; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 163 | struct fc_rport_identifiers ids; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 164 | u16 flags; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 165 | u16 max_seq; |
Joe Eykholt | 0f6c614 | 2009-08-25 14:02:11 -0700 | [diff] [blame] | 166 | u16 disc_id; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 167 | u16 maxframe_size; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 168 | unsigned int retries; |
| 169 | unsigned int e_d_tov; |
| 170 | unsigned int r_a_tov; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 171 | struct mutex rp_mutex; |
| 172 | struct delayed_work retry_work; |
| 173 | enum fc_rport_event event; |
| 174 | struct fc_rport_operations *ops; |
| 175 | struct list_head peers; |
| 176 | struct work_struct event_work; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 177 | u32 supported_classes; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 178 | }; |
| 179 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 180 | /* |
| 181 | * fcoe stats structure |
| 182 | */ |
| 183 | struct fcoe_dev_stats { |
| 184 | u64 SecondsSinceLastReset; |
| 185 | u64 TxFrames; |
| 186 | u64 TxWords; |
| 187 | u64 RxFrames; |
| 188 | u64 RxWords; |
| 189 | u64 ErrorFrames; |
| 190 | u64 DumpedFrames; |
| 191 | u64 LinkFailureCount; |
| 192 | u64 LossOfSignalCount; |
| 193 | u64 InvalidTxWordCount; |
| 194 | u64 InvalidCRCCount; |
| 195 | u64 InputRequests; |
| 196 | u64 OutputRequests; |
| 197 | u64 ControlRequests; |
| 198 | u64 InputMegabytes; |
| 199 | u64 OutputMegabytes; |
| 200 | }; |
| 201 | |
| 202 | /* |
| 203 | * els data is used for passing ELS respone specific |
| 204 | * data to send ELS response mainly using infomation |
| 205 | * in exchange and sequence in EM layer. |
| 206 | */ |
| 207 | struct fc_seq_els_data { |
| 208 | struct fc_frame *fp; |
| 209 | enum fc_els_rjt_reason reason; |
| 210 | enum fc_els_rjt_explan explan; |
| 211 | }; |
| 212 | |
| 213 | /* |
| 214 | * FCP request structure, one for each scsi cmd request |
| 215 | */ |
| 216 | struct fc_fcp_pkt { |
| 217 | /* |
| 218 | * housekeeping stuff |
| 219 | */ |
| 220 | struct fc_lport *lp; /* handle to hba struct */ |
| 221 | u16 state; /* scsi_pkt state state */ |
| 222 | u16 tgt_flags; /* target flags */ |
| 223 | atomic_t ref_cnt; /* fcp pkt ref count */ |
| 224 | spinlock_t scsi_pkt_lock; /* Must be taken before the host lock |
| 225 | * if both are held at the same time */ |
| 226 | /* |
| 227 | * SCSI I/O related stuff |
| 228 | */ |
| 229 | struct scsi_cmnd *cmd; /* scsi command pointer. set/clear |
| 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; |
| 238 | int wait_for_comp; |
| 239 | unsigned long start_time; /* start jiffie */ |
| 240 | unsigned long end_time; /* end jiffie */ |
| 241 | unsigned long last_pkt_time; /* jiffies of last frame received */ |
| 242 | |
| 243 | /* |
| 244 | * scsi cmd and data transfer information |
| 245 | */ |
| 246 | u32 data_len; |
| 247 | /* |
| 248 | * transport related veriables |
| 249 | */ |
| 250 | struct fcp_cmnd cdb_cmd; |
| 251 | size_t xfer_len; |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 252 | u16 xfer_ddp; /* this xfer is ddped */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 253 | u32 xfer_contig_end; /* offset of end of contiguous xfer */ |
| 254 | u16 max_payload; /* max payload size in bytes */ |
| 255 | |
| 256 | /* |
| 257 | * scsi/fcp return status |
| 258 | */ |
| 259 | u32 io_status; /* SCSI result upper 24 bits */ |
| 260 | u8 cdb_status; |
| 261 | u8 status_code; /* FCP I/O status */ |
| 262 | /* bit 3 Underrun bit 2: overrun */ |
| 263 | u8 scsi_comp_flags; |
| 264 | u32 req_flags; /* bit 0: read bit:1 write */ |
| 265 | u32 scsi_resid; /* residule length */ |
| 266 | |
| 267 | struct fc_rport *rport; /* remote port pointer */ |
| 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 | }; |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 275 | /* |
| 276 | * FC_FCP HELPER FUNCTIONS |
| 277 | *****************************/ |
| 278 | static 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 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 284 | |
| 285 | /* |
| 286 | * Structure and function definitions for managing Fibre Channel Exchanges |
| 287 | * and Sequences |
| 288 | * |
| 289 | * fc_exch holds state for one exchange and links to its active sequence. |
| 290 | * |
| 291 | * fc_seq holds the state for an individual sequence. |
| 292 | */ |
| 293 | |
| 294 | struct fc_exch_mgr; |
Vasu Dev | 9631609 | 2009-07-29 17:05:00 -0700 | [diff] [blame] | 295 | struct fc_exch_mgr_anchor; |
Vasu Dev | e4bc50b | 2009-08-25 13:58:47 -0700 | [diff] [blame] | 296 | extern u16 fc_cpu_mask; /* cpu mask for possible cpus */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 297 | |
| 298 | /* |
| 299 | * Sequence. |
| 300 | */ |
| 301 | struct fc_seq { |
| 302 | u8 id; /* seq ID */ |
| 303 | u16 ssb_stat; /* status flags for sequence status block */ |
| 304 | u16 cnt; /* frames sent so far on sequence */ |
| 305 | u32 rec_data; /* FC-4 value for REC */ |
| 306 | }; |
| 307 | |
| 308 | #define FC_EX_DONE (1 << 0) /* ep is completed */ |
| 309 | #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ |
| 310 | |
| 311 | /* |
| 312 | * Exchange. |
| 313 | * |
| 314 | * Locking notes: The ex_lock protects following items: |
| 315 | * state, esb_stat, f_ctl, seq.ssb_stat |
| 316 | * seq_id |
| 317 | * sequence allocation |
| 318 | */ |
| 319 | struct fc_exch { |
| 320 | struct fc_exch_mgr *em; /* exchange manager */ |
Vasu Dev | b2f0091 | 2009-08-25 13:58:53 -0700 | [diff] [blame] | 321 | struct fc_exch_pool *pool; /* per cpu exches pool */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 322 | u32 state; /* internal driver state */ |
| 323 | u16 xid; /* our exchange ID */ |
| 324 | struct list_head ex_list; /* free or busy list linkage */ |
| 325 | spinlock_t ex_lock; /* lock covering exchange state */ |
| 326 | atomic_t ex_refcnt; /* reference counter */ |
| 327 | struct delayed_work timeout_work; /* timer for upper level protocols */ |
| 328 | struct fc_lport *lp; /* fc device instance */ |
| 329 | u16 oxid; /* originator's exchange ID */ |
| 330 | u16 rxid; /* responder's exchange ID */ |
| 331 | u32 oid; /* originator's FCID */ |
| 332 | u32 sid; /* source FCID */ |
| 333 | u32 did; /* destination FCID */ |
| 334 | u32 esb_stat; /* exchange status for ESB */ |
| 335 | u32 r_a_tov; /* r_a_tov from rport (msec) */ |
| 336 | u8 seq_id; /* next sequence ID to use */ |
| 337 | u32 f_ctl; /* F_CTL flags for sequences */ |
| 338 | u8 fh_type; /* frame type */ |
| 339 | enum fc_class class; /* class of service */ |
| 340 | struct fc_seq seq; /* single sequence */ |
| 341 | /* |
| 342 | * Handler for responses to this current exchange. |
| 343 | */ |
| 344 | void (*resp)(struct fc_seq *, struct fc_frame *, void *); |
| 345 | void (*destructor)(struct fc_seq *, void *); |
| 346 | /* |
| 347 | * arg is passed as void pointer to exchange |
| 348 | * resp and destructor handlers |
| 349 | */ |
| 350 | void *arg; |
| 351 | }; |
| 352 | #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) |
| 353 | |
| 354 | struct libfc_function_template { |
| 355 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 356 | /* |
| 357 | * Interface to send a FC frame |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 358 | * |
| 359 | * STATUS: REQUIRED |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 360 | */ |
| 361 | int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp); |
| 362 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 363 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 364 | * Interface to send ELS/CT frames |
| 365 | * |
| 366 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 367 | */ |
| 368 | struct fc_seq *(*elsct_send)(struct fc_lport *lport, |
Joe Eykholt | a46f327 | 2009-08-25 14:00:55 -0700 | [diff] [blame] | 369 | u32 did, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 370 | struct fc_frame *fp, |
| 371 | unsigned int op, |
| 372 | void (*resp)(struct fc_seq *, |
| 373 | struct fc_frame *fp, |
| 374 | void *arg), |
| 375 | void *arg, u32 timer_msec); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 376 | |
| 377 | /* |
| 378 | * Send the FC frame payload using a new exchange and sequence. |
| 379 | * |
| 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() |
| 391 | * 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 |
| 393 | * fc_frame pointer in response handler will also indicate timeout |
| 394 | * as error using IS_ERR related macros. |
| 395 | * |
| 396 | * The exchange destructor handler is also set in this routine. |
| 397 | * The destructor handler is invoked by EM layer when exchange |
| 398 | * is about to free, this can be used by caller to free its |
| 399 | * resources along with exchange free. |
| 400 | * |
| 401 | * The arg is passed back to resp and destructor handler. |
| 402 | * |
| 403 | * The timeout value (in msec) for an exchange is set if non zero |
| 404 | * timer_msec argument is specified. The timer is canceled when |
| 405 | * it fires or when the exchange is done. The exchange timeout handler |
| 406 | * is registered by EM layer. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 407 | * |
| 408 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 409 | */ |
| 410 | struct fc_seq *(*exch_seq_send)(struct fc_lport *lp, |
| 411 | struct fc_frame *fp, |
| 412 | void (*resp)(struct fc_seq *sp, |
| 413 | struct fc_frame *fp, |
| 414 | void *arg), |
| 415 | void (*destructor)(struct fc_seq *sp, |
| 416 | void *arg), |
| 417 | void *arg, unsigned int timer_msec); |
| 418 | |
| 419 | /* |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 420 | * Sets up the DDP context for a given exchange id on the given |
| 421 | * scatterlist if LLD supports DDP for large receive. |
| 422 | * |
| 423 | * STATUS: OPTIONAL |
| 424 | */ |
| 425 | int (*ddp_setup)(struct fc_lport *lp, u16 xid, |
| 426 | struct scatterlist *sgl, unsigned int sgc); |
| 427 | /* |
| 428 | * Completes the DDP transfer and returns the length of data DDPed |
| 429 | * for the given exchange id. |
| 430 | * |
| 431 | * STATUS: OPTIONAL |
| 432 | */ |
| 433 | int (*ddp_done)(struct fc_lport *lp, u16 xid); |
| 434 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 435 | * Send a frame using an existing sequence and exchange. |
| 436 | * |
| 437 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 438 | */ |
| 439 | int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp, |
| 440 | struct fc_frame *fp); |
| 441 | |
| 442 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 443 | * Send an ELS response using infomation from a previous |
| 444 | * exchange and sequence. |
| 445 | * |
| 446 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 447 | */ |
| 448 | void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd, |
| 449 | struct fc_seq_els_data *els_data); |
| 450 | |
| 451 | /* |
| 452 | * Abort an exchange and sequence. Generally called because of a |
| 453 | * exchange timeout or an abort from the upper layer. |
| 454 | * |
| 455 | * A timer_msec can be specified for abort timeout, if non-zero |
| 456 | * timer_msec value is specified then exchange resp handler |
| 457 | * will be called with timeout error if no response to abort. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 458 | * |
| 459 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 460 | */ |
| 461 | int (*seq_exch_abort)(const struct fc_seq *req_sp, |
| 462 | unsigned int timer_msec); |
| 463 | |
| 464 | /* |
| 465 | * Indicate that an exchange/sequence tuple is complete and the memory |
| 466 | * allocated for the related objects may be freed. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 467 | * |
| 468 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 469 | */ |
| 470 | void (*exch_done)(struct fc_seq *sp); |
| 471 | |
| 472 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 473 | * Start a new sequence on the same exchange/sequence tuple. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 474 | * |
| 475 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 476 | */ |
| 477 | struct fc_seq *(*seq_start_next)(struct fc_seq *sp); |
| 478 | |
| 479 | /* |
| 480 | * Reset an exchange manager, completing all sequences and exchanges. |
| 481 | * If s_id is non-zero, reset only exchanges originating from that FID. |
| 482 | * If d_id is non-zero, reset only exchanges sending to that FID. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 483 | * |
| 484 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 485 | */ |
Abhijeet Joglekar | 1f6ff36 | 2009-02-27 10:54:35 -0800 | [diff] [blame] | 486 | void (*exch_mgr_reset)(struct fc_lport *, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 487 | u32 s_id, u32 d_id); |
| 488 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 489 | /* |
| 490 | * Flush the rport work queue. Generally used before shutdown. |
| 491 | * |
| 492 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 493 | */ |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 494 | void (*rport_flush_queue)(void); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 495 | |
| 496 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 497 | * Receive a frame for a local port. |
| 498 | * |
| 499 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 500 | */ |
| 501 | void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp, |
| 502 | struct fc_frame *fp); |
| 503 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 504 | /* |
| 505 | * Reset the local port. |
| 506 | * |
| 507 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 508 | */ |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 509 | int (*lport_reset)(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 510 | |
| 511 | /* |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 512 | * Create a remote port with a given port ID |
| 513 | * |
| 514 | * STATUS: OPTIONAL |
Robert Love | 5101ff9 | 2009-02-27 10:55:18 -0800 | [diff] [blame] | 515 | */ |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 516 | struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32); |
Robert Love | 5101ff9 | 2009-02-27 10:55:18 -0800 | [diff] [blame] | 517 | |
| 518 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 519 | * Initiates the RP state machine. It is called from the LP module. |
| 520 | * This function will issue the following commands to the N_Port |
| 521 | * identified by the FC ID provided. |
| 522 | * |
| 523 | * - PLOGI |
| 524 | * - PRLI |
| 525 | * - RTV |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 526 | * |
| 527 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 528 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 529 | int (*rport_login)(struct fc_rport_priv *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 530 | |
| 531 | /* |
| 532 | * Logoff, and remove the rport from the transport if |
| 533 | * it had been added. This will send a LOGO to the target. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 534 | * |
| 535 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 536 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 537 | int (*rport_logoff)(struct fc_rport_priv *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 538 | |
| 539 | /* |
| 540 | * Recieve a request from a remote port. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 541 | * |
| 542 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 543 | */ |
| 544 | void (*rport_recv_req)(struct fc_seq *, struct fc_frame *, |
Joe Eykholt | 131203a | 2009-08-25 14:03:10 -0700 | [diff] [blame] | 545 | struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 546 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 547 | /* |
| 548 | * lookup an rport by it's port ID. |
| 549 | * |
| 550 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 551 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 552 | struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 553 | |
| 554 | /* |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 555 | * Destroy an rport after final kref_put(). |
| 556 | * The argument is a pointer to the kref inside the fc_rport_priv. |
| 557 | */ |
| 558 | void (*rport_destroy)(struct kref *); |
| 559 | |
| 560 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 561 | * Send a fcp cmd from fsp pkt. |
| 562 | * Called with the SCSI host lock unlocked and irqs disabled. |
| 563 | * |
| 564 | * The resp handler is called when FCP_RSP received. |
| 565 | * |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 566 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 567 | */ |
| 568 | int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp, |
| 569 | void (*resp)(struct fc_seq *, struct fc_frame *fp, |
| 570 | void *arg)); |
| 571 | |
| 572 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 573 | * Cleanup the FCP layer, used durring link down and reset |
| 574 | * |
| 575 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 576 | */ |
| 577 | void (*fcp_cleanup)(struct fc_lport *lp); |
| 578 | |
| 579 | /* |
| 580 | * Abort all I/O on a local port |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 581 | * |
| 582 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 583 | */ |
| 584 | void (*fcp_abort_io)(struct fc_lport *lp); |
| 585 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 586 | /* |
| 587 | * Receive a request for the discovery layer. |
| 588 | * |
| 589 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 590 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 591 | void (*disc_recv_req)(struct fc_seq *, |
| 592 | struct fc_frame *, struct fc_lport *); |
| 593 | |
| 594 | /* |
| 595 | * Start discovery for a local port. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 596 | * |
| 597 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 598 | */ |
| 599 | void (*disc_start)(void (*disc_callback)(struct fc_lport *, |
| 600 | enum fc_disc_event), |
| 601 | struct fc_lport *); |
| 602 | |
| 603 | /* |
| 604 | * Stop discovery for a given lport. This will remove |
| 605 | * all discovered rports |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 606 | * |
| 607 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 608 | */ |
| 609 | void (*disc_stop) (struct fc_lport *); |
| 610 | |
| 611 | /* |
| 612 | * Stop discovery for a given lport. This will block |
| 613 | * until all discovered rports are deleted from the |
| 614 | * FC transport class |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 615 | * |
| 616 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 617 | */ |
| 618 | void (*disc_stop_final) (struct fc_lport *); |
| 619 | }; |
| 620 | |
| 621 | /* information used by the discovery layer */ |
| 622 | struct fc_disc { |
| 623 | unsigned char retry_count; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 624 | unsigned char pending; |
| 625 | unsigned char requested; |
| 626 | unsigned short seq_count; |
| 627 | unsigned char buf_len; |
Joe Eykholt | 0f6c614 | 2009-08-25 14:02:11 -0700 | [diff] [blame] | 628 | u16 disc_id; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 629 | |
| 630 | void (*disc_callback)(struct fc_lport *, |
| 631 | 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 | }; |
| 639 | |
| 640 | struct fc_lport { |
| 641 | struct list_head list; |
| 642 | |
| 643 | /* Associations */ |
| 644 | struct Scsi_Host *host; |
Vasu Dev | 9631609 | 2009-07-29 17:05:00 -0700 | [diff] [blame] | 645 | struct list_head ema_list; |
Chris Leech | 174e1eb | 2009-11-03 11:46:14 -0800 | [diff] [blame] | 646 | struct list_head vports; /* child vports if N_Port */ |
| 647 | struct fc_vport *vport; /* parent vport if VN_Port */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 648 | struct fc_rport_priv *dns_rp; |
| 649 | struct fc_rport_priv *ptp_rp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 650 | void *scsi_priv; |
| 651 | struct fc_disc disc; |
| 652 | |
| 653 | /* Operational Information */ |
| 654 | struct libfc_function_template tt; |
Vasu Dev | bc0e17f | 2009-02-27 10:54:57 -0800 | [diff] [blame] | 655 | u8 link_up; |
| 656 | u8 qfull; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 657 | enum fc_lport_state state; |
| 658 | unsigned long boot_time; |
| 659 | |
| 660 | struct fc_host_statistics host_stats; |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 661 | struct fcoe_dev_stats *dev_stats; |
| 662 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 663 | u64 wwpn; |
| 664 | u64 wwnn; |
| 665 | u8 retry_count; |
| 666 | |
| 667 | /* Capabilities */ |
| 668 | u32 sg_supp:1; /* scatter gather supported */ |
| 669 | u32 seq_offload:1; /* seq offload supported */ |
| 670 | u32 crc_offload:1; /* crc offload supported */ |
| 671 | u32 lro_enabled:1; /* large receive offload */ |
Chris Leech | 174e1eb | 2009-11-03 11:46:14 -0800 | [diff] [blame] | 672 | u32 does_npiv:1; /* supports multiple vports */ |
| 673 | u32 npiv_enabled:1; /* switch/fabric allows NPIV */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 674 | u32 mfs; /* max FC payload size */ |
| 675 | unsigned int service_params; |
| 676 | unsigned int e_d_tov; |
| 677 | unsigned int r_a_tov; |
| 678 | u8 max_retry_count; |
Abhijeet Joglekar | a366695 | 2009-05-01 10:01:26 -0700 | [diff] [blame] | 679 | u8 max_rport_retry_count; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 680 | u16 link_speed; |
| 681 | u16 link_supported_speeds; |
| 682 | u16 lro_xid; /* max xid for fcoe lro */ |
Yi Zou | ea1e9a9 | 2009-02-27 14:07:04 -0800 | [diff] [blame] | 683 | unsigned int lso_max; /* max large send size */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 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 | |
| 690 | /* Miscellaneous */ |
| 691 | struct delayed_work retry_work; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 692 | }; |
| 693 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 694 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 695 | * FC_LPORT HELPER FUNCTIONS |
| 696 | *****************************/ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 697 | static inline int fc_lport_test_ready(struct fc_lport *lp) |
| 698 | { |
| 699 | return lp->state == LPORT_ST_READY; |
| 700 | } |
| 701 | |
| 702 | static inline void fc_set_wwnn(struct fc_lport *lp, u64 wwnn) |
| 703 | { |
| 704 | lp->wwnn = wwnn; |
| 705 | } |
| 706 | |
| 707 | static inline void fc_set_wwpn(struct fc_lport *lp, u64 wwnn) |
| 708 | { |
| 709 | lp->wwpn = wwnn; |
| 710 | } |
| 711 | |
| 712 | static inline void fc_lport_state_enter(struct fc_lport *lp, |
| 713 | enum fc_lport_state state) |
| 714 | { |
| 715 | if (state != lp->state) |
| 716 | lp->retry_count = 0; |
| 717 | lp->state = state; |
| 718 | } |
| 719 | |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 720 | static inline int fc_lport_init_stats(struct fc_lport *lp) |
| 721 | { |
| 722 | /* allocate per cpu stats block */ |
| 723 | lp->dev_stats = alloc_percpu(struct fcoe_dev_stats); |
| 724 | if (!lp->dev_stats) |
| 725 | return -ENOMEM; |
| 726 | return 0; |
| 727 | } |
| 728 | |
| 729 | static inline void fc_lport_free_stats(struct fc_lport *lp) |
| 730 | { |
| 731 | free_percpu(lp->dev_stats); |
| 732 | } |
| 733 | |
| 734 | static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lp) |
| 735 | { |
| 736 | return per_cpu_ptr(lp->dev_stats, smp_processor_id()); |
| 737 | } |
| 738 | |
Vasu Dev | a0a25da | 2009-03-17 11:42:29 -0700 | [diff] [blame] | 739 | static inline void *lport_priv(const struct fc_lport *lp) |
| 740 | { |
| 741 | return (void *)(lp + 1); |
| 742 | } |
| 743 | |
| 744 | /** |
| 745 | * libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport |
| 746 | * @sht: ptr to the scsi host templ |
| 747 | * @priv_size: size of private data after fc_lport |
| 748 | * |
Chris Leech | 8622196 | 2009-11-03 11:46:08 -0800 | [diff] [blame] | 749 | * Returns: libfc lport |
Vasu Dev | a0a25da | 2009-03-17 11:42:29 -0700 | [diff] [blame] | 750 | */ |
Chris Leech | 8622196 | 2009-11-03 11:46:08 -0800 | [diff] [blame] | 751 | static inline struct fc_lport * |
Vasu Dev | a0a25da | 2009-03-17 11:42:29 -0700 | [diff] [blame] | 752 | libfc_host_alloc(struct scsi_host_template *sht, int priv_size) |
| 753 | { |
Chris Leech | 8622196 | 2009-11-03 11:46:08 -0800 | [diff] [blame] | 754 | struct fc_lport *lport; |
| 755 | struct Scsi_Host *shost; |
| 756 | |
| 757 | shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size); |
| 758 | if (!shost) |
| 759 | return NULL; |
| 760 | lport = shost_priv(shost); |
| 761 | lport->host = shost; |
| 762 | INIT_LIST_HEAD(&lport->ema_list); |
Chris Leech | 174e1eb | 2009-11-03 11:46:14 -0800 | [diff] [blame] | 763 | INIT_LIST_HEAD(&lport->vports); |
Chris Leech | 8622196 | 2009-11-03 11:46:08 -0800 | [diff] [blame] | 764 | return lport; |
Vasu Dev | a0a25da | 2009-03-17 11:42:29 -0700 | [diff] [blame] | 765 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 766 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 767 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 768 | * LOCAL PORT LAYER |
| 769 | *****************************/ |
| 770 | int fc_lport_init(struct fc_lport *lp); |
| 771 | |
| 772 | /* |
| 773 | * Destroy the specified local port by finding and freeing all |
| 774 | * fc_rports associated with it and then by freeing the fc_lport |
| 775 | * itself. |
| 776 | */ |
| 777 | int fc_lport_destroy(struct fc_lport *lp); |
| 778 | |
| 779 | /* |
| 780 | * Logout the specified local port from the fabric |
| 781 | */ |
| 782 | int 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 | */ |
| 789 | int fc_fabric_login(struct fc_lport *lp); |
| 790 | |
| 791 | /* |
| 792 | * The link is up for the given local port. |
| 793 | */ |
Chris Leech | 8faecdd | 2009-11-03 11:46:19 -0800 | [diff] [blame] | 794 | void __fc_linkup(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 795 | void fc_linkup(struct fc_lport *); |
| 796 | |
| 797 | /* |
| 798 | * Link is down for the given local port. |
| 799 | */ |
Chris Leech | 8faecdd | 2009-11-03 11:46:19 -0800 | [diff] [blame] | 800 | void __fc_linkdown(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 801 | void fc_linkdown(struct fc_lport *); |
| 802 | |
| 803 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 804 | * Configure the local port. |
| 805 | */ |
| 806 | int fc_lport_config(struct fc_lport *); |
| 807 | |
| 808 | /* |
| 809 | * Reset the local port. |
| 810 | */ |
| 811 | int fc_lport_reset(struct fc_lport *); |
| 812 | |
| 813 | /* |
| 814 | * Set the mfs or reset |
| 815 | */ |
| 816 | int fc_set_mfs(struct fc_lport *lp, u32 mfs); |
| 817 | |
Chris Leech | 174e1eb | 2009-11-03 11:46:14 -0800 | [diff] [blame] | 818 | /* |
| 819 | * Allocate a new lport struct for an NPIV VN_Port |
| 820 | */ |
| 821 | struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize); |
| 822 | |
| 823 | /* |
| 824 | * Find an NPIV VN_Port by port ID |
| 825 | */ |
| 826 | struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 827 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 828 | /* |
Chris Leech | 8faecdd | 2009-11-03 11:46:19 -0800 | [diff] [blame] | 829 | * NPIV VN_Port link state management |
| 830 | */ |
| 831 | void fc_vport_setlink(struct fc_lport *vn_port); |
| 832 | void fc_vports_linkchange(struct fc_lport *n_port); |
| 833 | |
| 834 | /* |
Steve Ma | a51ab39 | 2009-11-03 11:47:34 -0800 | [diff] [blame^] | 835 | * Issue fc pass-thru request via bsg interface |
| 836 | */ |
| 837 | int fc_lport_bsg_request(struct fc_bsg_job *job); |
| 838 | |
| 839 | |
| 840 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 841 | * REMOTE PORT LAYER |
| 842 | *****************************/ |
| 843 | int fc_rport_init(struct fc_lport *lp); |
| 844 | void fc_rport_terminate_io(struct fc_rport *rp); |
| 845 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 846 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 847 | * DISCOVERY LAYER |
| 848 | *****************************/ |
| 849 | int fc_disc_init(struct fc_lport *lp); |
| 850 | |
| 851 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 852 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 853 | * SCSI LAYER |
| 854 | *****************************/ |
| 855 | /* |
| 856 | * Initialize the SCSI block of libfc |
| 857 | */ |
| 858 | int fc_fcp_init(struct fc_lport *); |
| 859 | |
| 860 | /* |
| 861 | * This section provides an API which allows direct interaction |
| 862 | * with the SCSI-ml. Each of these functions satisfies a function |
| 863 | * pointer defined in Scsi_Host and therefore is always called |
| 864 | * directly from the SCSI-ml. |
| 865 | */ |
| 866 | int fc_queuecommand(struct scsi_cmnd *sc_cmd, |
| 867 | void (*done)(struct scsi_cmnd *)); |
| 868 | |
| 869 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 870 | * Send an ABTS frame to the target device. The sc_cmd argument |
| 871 | * is a pointer to the SCSI command to be aborted. |
| 872 | */ |
| 873 | int fc_eh_abort(struct scsi_cmnd *sc_cmd); |
| 874 | |
| 875 | /* |
| 876 | * Reset a LUN by sending send the tm cmd to the target. |
| 877 | */ |
| 878 | int fc_eh_device_reset(struct scsi_cmnd *sc_cmd); |
| 879 | |
| 880 | /* |
| 881 | * Reset the host adapter. |
| 882 | */ |
| 883 | int fc_eh_host_reset(struct scsi_cmnd *sc_cmd); |
| 884 | |
| 885 | /* |
| 886 | * Check rport status. |
| 887 | */ |
| 888 | int fc_slave_alloc(struct scsi_device *sdev); |
| 889 | |
| 890 | /* |
| 891 | * Adjust the queue depth. |
| 892 | */ |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 893 | int fc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 894 | |
| 895 | /* |
| 896 | * Change the tag type. |
| 897 | */ |
| 898 | int fc_change_queue_type(struct scsi_device *sdev, int tag_type); |
| 899 | |
| 900 | /* |
| 901 | * Free memory pools used by the FCP layer. |
| 902 | */ |
| 903 | void fc_fcp_destroy(struct fc_lport *); |
| 904 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 905 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 906 | * ELS/CT interface |
| 907 | *****************************/ |
| 908 | /* |
| 909 | * Initializes ELS/CT interface |
| 910 | */ |
| 911 | int fc_elsct_init(struct fc_lport *lp); |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 912 | struct fc_seq *fc_elsct_send(struct fc_lport *lport, |
| 913 | u32 did, |
| 914 | struct fc_frame *fp, |
| 915 | unsigned int op, |
| 916 | void (*resp)(struct fc_seq *, |
| 917 | struct fc_frame *fp, |
| 918 | void *arg), |
| 919 | void *arg, u32 timer_msec); |
| 920 | void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *); |
| 921 | void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 922 | |
| 923 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 924 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 925 | * EXCHANGE MANAGER LAYER |
| 926 | *****************************/ |
| 927 | /* |
| 928 | * Initializes Exchange Manager related |
| 929 | * function pointers in struct libfc_function_template. |
| 930 | */ |
| 931 | int fc_exch_init(struct fc_lport *lp); |
| 932 | |
| 933 | /* |
Vasu Dev | 9631609 | 2009-07-29 17:05:00 -0700 | [diff] [blame] | 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 | */ |
| 942 | struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport, |
| 943 | struct fc_exch_mgr *mp, |
| 944 | bool (*match)(struct fc_frame *)); |
| 945 | |
| 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 | */ |
| 953 | void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema); |
| 954 | |
| 955 | /* |
Chris Leech | 174e1eb | 2009-11-03 11:46:14 -0800 | [diff] [blame] | 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 | */ |
| 959 | int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst); |
| 960 | |
| 961 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 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. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 976 | * |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 977 | * Specified match function is used in allocating exchanges |
| 978 | * from newly allocated EM. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 979 | */ |
| 980 | struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp, |
| 981 | enum fc_class class, |
| 982 | u16 min_xid, |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 983 | u16 max_xid, |
| 984 | bool (*match)(struct fc_frame *)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 985 | |
| 986 | /* |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 987 | * Free all exchange managers of a lport. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 988 | */ |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 989 | void fc_exch_mgr_free(struct fc_lport *lport); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 990 | |
| 991 | /* |
| 992 | * Receive a frame on specified local port and exchange manager. |
| 993 | */ |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 994 | void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 995 | |
| 996 | /* |
Vasu Dev | b2f0091 | 2009-08-25 13:58:53 -0700 | [diff] [blame] | 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. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1001 | */ |
Abhijeet Joglekar | 1f6ff36 | 2009-02-27 10:54:35 -0800 | [diff] [blame] | 1002 | void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1003 | |
| 1004 | /* |
| 1005 | * Functions for fc_functions_template |
| 1006 | */ |
| 1007 | void fc_get_host_speed(struct Scsi_Host *shost); |
| 1008 | void fc_get_host_port_type(struct Scsi_Host *shost); |
| 1009 | void fc_get_host_port_state(struct Scsi_Host *shost); |
| 1010 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout); |
| 1011 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); |
| 1012 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1013 | #endif /* _LIBFC_H_ */ |