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> |
| 29 | |
| 30 | #include <scsi/fc/fc_fcp.h> |
| 31 | #include <scsi/fc/fc_ns.h> |
| 32 | #include <scsi/fc/fc_els.h> |
| 33 | #include <scsi/fc/fc_gs.h> |
| 34 | |
| 35 | #include <scsi/fc_frame.h> |
| 36 | |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 37 | #define FC_LIBFC_LOGGING 0x01 /* General logging, not categorized */ |
| 38 | #define FC_LPORT_LOGGING 0x02 /* lport layer logging */ |
| 39 | #define FC_DISC_LOGGING 0x04 /* discovery layer logging */ |
| 40 | #define FC_RPORT_LOGGING 0x08 /* rport layer logging */ |
| 41 | #define FC_FCP_LOGGING 0x10 /* I/O path logging */ |
| 42 | #define FC_EM_LOGGING 0x20 /* Exchange Manager logging */ |
| 43 | #define FC_EXCH_LOGGING 0x40 /* Exchange/Sequence logging */ |
| 44 | #define FC_SCSI_LOGGING 0x80 /* SCSI logging (mostly error handling) */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 45 | |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 46 | extern unsigned int fc_debug_logging; |
| 47 | |
| 48 | #define FC_CHECK_LOGGING(LEVEL, CMD) \ |
| 49 | do { \ |
| 50 | if (unlikely(fc_debug_logging & LEVEL)) \ |
| 51 | do { \ |
| 52 | CMD; \ |
| 53 | } while (0); \ |
Joe Eykholt | beb29a6 | 2009-07-29 17:04:06 -0700 | [diff] [blame] | 54 | } while (0) |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 55 | |
| 56 | #define FC_LIBFC_DBG(fmt, args...) \ |
| 57 | FC_CHECK_LOGGING(FC_LIBFC_LOGGING, \ |
Joe Eykholt | beb29a6 | 2009-07-29 17:04:06 -0700 | [diff] [blame] | 58 | printk(KERN_INFO "libfc: " fmt, ##args)) |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 59 | |
| 60 | #define FC_LPORT_DBG(lport, fmt, args...) \ |
| 61 | FC_CHECK_LOGGING(FC_LPORT_LOGGING, \ |
Joe Eykholt | 7f74549 | 2009-07-29 17:04:12 -0700 | [diff] [blame] | 62 | printk(KERN_INFO "host%u: lport %6x: " fmt, \ |
| 63 | (lport)->host->host_no, \ |
| 64 | fc_host_port_id((lport)->host), ##args)) |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 65 | |
| 66 | #define FC_DISC_DBG(disc, fmt, args...) \ |
| 67 | FC_CHECK_LOGGING(FC_DISC_LOGGING, \ |
Joe Eykholt | 7f74549 | 2009-07-29 17:04:12 -0700 | [diff] [blame] | 68 | printk(KERN_INFO "host%u: disc: " fmt, \ |
| 69 | (disc)->lport->host->host_no, \ |
Joe Eykholt | beb29a6 | 2009-07-29 17:04:06 -0700 | [diff] [blame] | 70 | ##args)) |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 71 | |
Joe Eykholt | 7f74549 | 2009-07-29 17:04:12 -0700 | [diff] [blame] | 72 | #define FC_RPORT_ID_DBG(lport, port_id, fmt, args...) \ |
| 73 | FC_CHECK_LOGGING(FC_RPORT_LOGGING, \ |
| 74 | printk(KERN_INFO "host%u: rport %6x: " fmt, \ |
| 75 | (lport)->host->host_no, \ |
| 76 | (port_id), ##args)) |
| 77 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 78 | #define FC_RPORT_DBG(rdata, fmt, args...) \ |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 79 | FC_RPORT_ID_DBG((rdata)->local_port, (rdata)->ids.port_id, fmt, ##args) |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 80 | |
| 81 | #define FC_FCP_DBG(pkt, fmt, args...) \ |
| 82 | FC_CHECK_LOGGING(FC_FCP_LOGGING, \ |
Joe Eykholt | 7f74549 | 2009-07-29 17:04:12 -0700 | [diff] [blame] | 83 | printk(KERN_INFO "host%u: fcp: %6x: " fmt, \ |
| 84 | (pkt)->lp->host->host_no, \ |
Joe Eykholt | beb29a6 | 2009-07-29 17:04:06 -0700 | [diff] [blame] | 85 | pkt->rport->port_id, ##args)) |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 86 | |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 87 | #define FC_EXCH_DBG(exch, fmt, args...) \ |
| 88 | FC_CHECK_LOGGING(FC_EXCH_LOGGING, \ |
Joe Eykholt | 7f74549 | 2009-07-29 17:04:12 -0700 | [diff] [blame] | 89 | printk(KERN_INFO "host%u: xid %4x: " fmt, \ |
| 90 | (exch)->lp->host->host_no, \ |
Joe Eykholt | beb29a6 | 2009-07-29 17:04:06 -0700 | [diff] [blame] | 91 | exch->xid, ##args)) |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 92 | |
| 93 | #define FC_SCSI_DBG(lport, fmt, args...) \ |
| 94 | FC_CHECK_LOGGING(FC_SCSI_LOGGING, \ |
Joe Eykholt | 7f74549 | 2009-07-29 17:04:12 -0700 | [diff] [blame] | 95 | printk(KERN_INFO "host%u: scsi: " fmt, \ |
| 96 | (lport)->host->host_no, ##args)) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 97 | |
| 98 | /* |
| 99 | * libfc error codes |
| 100 | */ |
| 101 | #define FC_NO_ERR 0 /* no error */ |
| 102 | #define FC_EX_TIMEOUT 1 /* Exchange timeout */ |
| 103 | #define FC_EX_CLOSED 2 /* Exchange closed */ |
| 104 | |
| 105 | /* some helpful macros */ |
| 106 | |
| 107 | #define ntohll(x) be64_to_cpu(x) |
| 108 | #define htonll(x) cpu_to_be64(x) |
| 109 | |
| 110 | #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2])) |
| 111 | |
| 112 | #define hton24(p, v) do { \ |
| 113 | p[0] = (((v) >> 16) & 0xFF); \ |
| 114 | p[1] = (((v) >> 8) & 0xFF); \ |
| 115 | p[2] = ((v) & 0xFF); \ |
| 116 | } while (0) |
| 117 | |
| 118 | /* |
| 119 | * FC HBA status |
| 120 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 121 | enum fc_lport_state { |
Joe Eykholt | b1d9fd5 | 2009-07-29 17:04:22 -0700 | [diff] [blame] | 122 | LPORT_ST_DISABLED = 0, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 123 | LPORT_ST_FLOGI, |
| 124 | LPORT_ST_DNS, |
| 125 | LPORT_ST_RPN_ID, |
| 126 | LPORT_ST_RFT_ID, |
| 127 | LPORT_ST_SCR, |
| 128 | LPORT_ST_READY, |
| 129 | LPORT_ST_LOGO, |
| 130 | LPORT_ST_RESET |
| 131 | }; |
| 132 | |
| 133 | enum fc_disc_event { |
| 134 | DISC_EV_NONE = 0, |
| 135 | DISC_EV_SUCCESS, |
| 136 | DISC_EV_FAILED |
| 137 | }; |
| 138 | |
| 139 | enum fc_rport_state { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 140 | RPORT_ST_INIT, /* initialized */ |
| 141 | RPORT_ST_PLOGI, /* waiting for PLOGI completion */ |
| 142 | RPORT_ST_PRLI, /* waiting for PRLI completion */ |
| 143 | RPORT_ST_RTV, /* waiting for RTV completion */ |
| 144 | RPORT_ST_READY, /* ready for use */ |
| 145 | RPORT_ST_LOGO, /* port logout sent */ |
Joe Eykholt | 1419405 | 2009-07-29 17:04:43 -0700 | [diff] [blame] | 146 | RPORT_ST_DELETE, /* port being deleted */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 147 | }; |
| 148 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 149 | /** |
| 150 | * struct fc_disc_port - temporary discovery port to hold rport identifiers |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame^] | 151 | * @lp: Fibre Channel host port instance |
| 152 | * @peers: Node for list management during discovery and RSCN processing |
| 153 | * @rport_work: Work struct for starting the rport state machine |
| 154 | * @port_id: Port ID of the discovered port |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 155 | */ |
| 156 | struct fc_disc_port { |
| 157 | struct fc_lport *lp; |
| 158 | struct list_head peers; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 159 | struct work_struct rport_work; |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame^] | 160 | u32 port_id; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 161 | }; |
| 162 | |
| 163 | enum fc_rport_event { |
| 164 | RPORT_EV_NONE = 0, |
Joe Eykholt | 4c0f62b | 2009-08-25 14:01:12 -0700 | [diff] [blame] | 165 | RPORT_EV_READY, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 166 | RPORT_EV_FAILED, |
| 167 | RPORT_EV_STOP, |
| 168 | RPORT_EV_LOGO |
| 169 | }; |
| 170 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 171 | struct fc_rport_priv; |
| 172 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 173 | struct fc_rport_operations { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 174 | void (*event_callback)(struct fc_lport *, struct fc_rport_priv *, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 175 | enum fc_rport_event); |
| 176 | }; |
| 177 | |
| 178 | /** |
| 179 | * struct fc_rport_libfc_priv - libfc internal information about a remote port |
| 180 | * @local_port: Fibre Channel host port instance |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 181 | * @rp_state: indicates READY for I/O or DELETE when blocked. |
| 182 | * @flags: REC and RETRY supported flags |
| 183 | * @e_d_tov: error detect timeout value (in msec) |
| 184 | * @r_a_tov: resource allocation timeout value (in msec) |
| 185 | */ |
| 186 | struct fc_rport_libfc_priv { |
| 187 | struct fc_lport *local_port; |
| 188 | enum fc_rport_state rp_state; |
| 189 | u16 flags; |
| 190 | #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0) |
| 191 | #define FC_RP_FLAGS_RETRY (1 << 1) |
| 192 | unsigned int e_d_tov; |
| 193 | unsigned int r_a_tov; |
| 194 | }; |
| 195 | |
| 196 | /** |
| 197 | * struct fc_rport_priv - libfc rport and discovery info about a remote port |
| 198 | * @local_port: Fibre Channel host port instance |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 199 | * @rport: transport remote port |
| 200 | * @kref: reference counter |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 201 | * @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 202 | * @ids: remote port identifiers and roles |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 203 | * @flags: REC and RETRY supported flags |
| 204 | * @max_seq: maximum number of concurrent sequences |
Joe Eykholt | 0f6c614 | 2009-08-25 14:02:11 -0700 | [diff] [blame] | 205 | * @disc_id: discovery identifier |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 206 | * @maxframe_size: maximum frame size |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 207 | * @retries: retry count in current state |
| 208 | * @e_d_tov: error detect timeout value (in msec) |
| 209 | * @r_a_tov: resource allocation timeout value (in msec) |
| 210 | * @rp_mutex: mutex protects rport |
| 211 | * @retry_work: |
| 212 | * @event_callback: Callback for rport READY, FAILED or LOGO |
| 213 | */ |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 214 | struct fc_rport_priv { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 215 | struct fc_lport *local_port; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 216 | struct fc_rport *rport; |
| 217 | struct kref kref; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 218 | enum fc_rport_state rp_state; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 219 | struct fc_rport_identifiers ids; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 220 | u16 flags; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 221 | u16 max_seq; |
Joe Eykholt | 0f6c614 | 2009-08-25 14:02:11 -0700 | [diff] [blame] | 222 | u16 disc_id; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 223 | u16 maxframe_size; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 224 | unsigned int retries; |
| 225 | unsigned int e_d_tov; |
| 226 | unsigned int r_a_tov; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 227 | struct mutex rp_mutex; |
| 228 | struct delayed_work retry_work; |
| 229 | enum fc_rport_event event; |
| 230 | struct fc_rport_operations *ops; |
| 231 | struct list_head peers; |
| 232 | struct work_struct event_work; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 233 | u32 supported_classes; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 234 | }; |
| 235 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 236 | /* |
| 237 | * fcoe stats structure |
| 238 | */ |
| 239 | struct fcoe_dev_stats { |
| 240 | u64 SecondsSinceLastReset; |
| 241 | u64 TxFrames; |
| 242 | u64 TxWords; |
| 243 | u64 RxFrames; |
| 244 | u64 RxWords; |
| 245 | u64 ErrorFrames; |
| 246 | u64 DumpedFrames; |
| 247 | u64 LinkFailureCount; |
| 248 | u64 LossOfSignalCount; |
| 249 | u64 InvalidTxWordCount; |
| 250 | u64 InvalidCRCCount; |
| 251 | u64 InputRequests; |
| 252 | u64 OutputRequests; |
| 253 | u64 ControlRequests; |
| 254 | u64 InputMegabytes; |
| 255 | u64 OutputMegabytes; |
| 256 | }; |
| 257 | |
| 258 | /* |
| 259 | * els data is used for passing ELS respone specific |
| 260 | * data to send ELS response mainly using infomation |
| 261 | * in exchange and sequence in EM layer. |
| 262 | */ |
| 263 | struct fc_seq_els_data { |
| 264 | struct fc_frame *fp; |
| 265 | enum fc_els_rjt_reason reason; |
| 266 | enum fc_els_rjt_explan explan; |
| 267 | }; |
| 268 | |
| 269 | /* |
| 270 | * FCP request structure, one for each scsi cmd request |
| 271 | */ |
| 272 | struct fc_fcp_pkt { |
| 273 | /* |
| 274 | * housekeeping stuff |
| 275 | */ |
| 276 | struct fc_lport *lp; /* handle to hba struct */ |
| 277 | u16 state; /* scsi_pkt state state */ |
| 278 | u16 tgt_flags; /* target flags */ |
| 279 | atomic_t ref_cnt; /* fcp pkt ref count */ |
| 280 | spinlock_t scsi_pkt_lock; /* Must be taken before the host lock |
| 281 | * if both are held at the same time */ |
| 282 | /* |
| 283 | * SCSI I/O related stuff |
| 284 | */ |
| 285 | struct scsi_cmnd *cmd; /* scsi command pointer. set/clear |
| 286 | * under host lock */ |
| 287 | struct list_head list; /* tracks queued commands. access under |
| 288 | * host lock */ |
| 289 | /* |
| 290 | * timeout related stuff |
| 291 | */ |
| 292 | struct timer_list timer; /* command timer */ |
| 293 | struct completion tm_done; |
| 294 | int wait_for_comp; |
| 295 | unsigned long start_time; /* start jiffie */ |
| 296 | unsigned long end_time; /* end jiffie */ |
| 297 | unsigned long last_pkt_time; /* jiffies of last frame received */ |
| 298 | |
| 299 | /* |
| 300 | * scsi cmd and data transfer information |
| 301 | */ |
| 302 | u32 data_len; |
| 303 | /* |
| 304 | * transport related veriables |
| 305 | */ |
| 306 | struct fcp_cmnd cdb_cmd; |
| 307 | size_t xfer_len; |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 308 | u16 xfer_ddp; /* this xfer is ddped */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 309 | u32 xfer_contig_end; /* offset of end of contiguous xfer */ |
| 310 | u16 max_payload; /* max payload size in bytes */ |
| 311 | |
| 312 | /* |
| 313 | * scsi/fcp return status |
| 314 | */ |
| 315 | u32 io_status; /* SCSI result upper 24 bits */ |
| 316 | u8 cdb_status; |
| 317 | u8 status_code; /* FCP I/O status */ |
| 318 | /* bit 3 Underrun bit 2: overrun */ |
| 319 | u8 scsi_comp_flags; |
| 320 | u32 req_flags; /* bit 0: read bit:1 write */ |
| 321 | u32 scsi_resid; /* residule length */ |
| 322 | |
| 323 | struct fc_rport *rport; /* remote port pointer */ |
| 324 | struct fc_seq *seq_ptr; /* current sequence pointer */ |
| 325 | /* |
| 326 | * Error Processing |
| 327 | */ |
| 328 | u8 recov_retry; /* count of recovery retries */ |
| 329 | struct fc_seq *recov_seq; /* sequence for REC or SRR */ |
| 330 | }; |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 331 | /* |
| 332 | * FC_FCP HELPER FUNCTIONS |
| 333 | *****************************/ |
| 334 | static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp) |
| 335 | { |
| 336 | if (fsp && fsp->cmd) |
| 337 | return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE; |
| 338 | return false; |
| 339 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 340 | |
| 341 | /* |
| 342 | * Structure and function definitions for managing Fibre Channel Exchanges |
| 343 | * and Sequences |
| 344 | * |
| 345 | * fc_exch holds state for one exchange and links to its active sequence. |
| 346 | * |
| 347 | * fc_seq holds the state for an individual sequence. |
| 348 | */ |
| 349 | |
| 350 | struct fc_exch_mgr; |
Vasu Dev | 9631609 | 2009-07-29 17:05:00 -0700 | [diff] [blame] | 351 | struct fc_exch_mgr_anchor; |
Vasu Dev | e4bc50b | 2009-08-25 13:58:47 -0700 | [diff] [blame] | 352 | extern u16 fc_cpu_mask; /* cpu mask for possible cpus */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 353 | |
| 354 | /* |
| 355 | * Sequence. |
| 356 | */ |
| 357 | struct fc_seq { |
| 358 | u8 id; /* seq ID */ |
| 359 | u16 ssb_stat; /* status flags for sequence status block */ |
| 360 | u16 cnt; /* frames sent so far on sequence */ |
| 361 | u32 rec_data; /* FC-4 value for REC */ |
| 362 | }; |
| 363 | |
| 364 | #define FC_EX_DONE (1 << 0) /* ep is completed */ |
| 365 | #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ |
| 366 | |
| 367 | /* |
| 368 | * Exchange. |
| 369 | * |
| 370 | * Locking notes: The ex_lock protects following items: |
| 371 | * state, esb_stat, f_ctl, seq.ssb_stat |
| 372 | * seq_id |
| 373 | * sequence allocation |
| 374 | */ |
| 375 | struct fc_exch { |
| 376 | struct fc_exch_mgr *em; /* exchange manager */ |
Vasu Dev | b2f0091 | 2009-08-25 13:58:53 -0700 | [diff] [blame] | 377 | struct fc_exch_pool *pool; /* per cpu exches pool */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 378 | u32 state; /* internal driver state */ |
| 379 | u16 xid; /* our exchange ID */ |
| 380 | struct list_head ex_list; /* free or busy list linkage */ |
| 381 | spinlock_t ex_lock; /* lock covering exchange state */ |
| 382 | atomic_t ex_refcnt; /* reference counter */ |
| 383 | struct delayed_work timeout_work; /* timer for upper level protocols */ |
| 384 | struct fc_lport *lp; /* fc device instance */ |
| 385 | u16 oxid; /* originator's exchange ID */ |
| 386 | u16 rxid; /* responder's exchange ID */ |
| 387 | u32 oid; /* originator's FCID */ |
| 388 | u32 sid; /* source FCID */ |
| 389 | u32 did; /* destination FCID */ |
| 390 | u32 esb_stat; /* exchange status for ESB */ |
| 391 | u32 r_a_tov; /* r_a_tov from rport (msec) */ |
| 392 | u8 seq_id; /* next sequence ID to use */ |
| 393 | u32 f_ctl; /* F_CTL flags for sequences */ |
| 394 | u8 fh_type; /* frame type */ |
| 395 | enum fc_class class; /* class of service */ |
| 396 | struct fc_seq seq; /* single sequence */ |
| 397 | /* |
| 398 | * Handler for responses to this current exchange. |
| 399 | */ |
| 400 | void (*resp)(struct fc_seq *, struct fc_frame *, void *); |
| 401 | void (*destructor)(struct fc_seq *, void *); |
| 402 | /* |
| 403 | * arg is passed as void pointer to exchange |
| 404 | * resp and destructor handlers |
| 405 | */ |
| 406 | void *arg; |
| 407 | }; |
| 408 | #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) |
| 409 | |
| 410 | struct libfc_function_template { |
| 411 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 412 | /* |
| 413 | * Interface to send a FC frame |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 414 | * |
| 415 | * STATUS: REQUIRED |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 416 | */ |
| 417 | int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp); |
| 418 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 419 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 420 | * Interface to send ELS/CT frames |
| 421 | * |
| 422 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 423 | */ |
| 424 | struct fc_seq *(*elsct_send)(struct fc_lport *lport, |
Joe Eykholt | a46f327 | 2009-08-25 14:00:55 -0700 | [diff] [blame] | 425 | u32 did, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 426 | struct fc_frame *fp, |
| 427 | unsigned int op, |
| 428 | void (*resp)(struct fc_seq *, |
| 429 | struct fc_frame *fp, |
| 430 | void *arg), |
| 431 | void *arg, u32 timer_msec); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 432 | |
| 433 | /* |
| 434 | * Send the FC frame payload using a new exchange and sequence. |
| 435 | * |
| 436 | * The frame pointer with some of the header's fields must be |
| 437 | * filled before calling exch_seq_send(), those fields are, |
| 438 | * |
| 439 | * - routing control |
| 440 | * - FC port did |
| 441 | * - FC port sid |
| 442 | * - FC header type |
| 443 | * - frame control |
| 444 | * - parameter or relative offset |
| 445 | * |
| 446 | * The exchange response handler is set in this routine to resp() |
| 447 | * function pointer. It can be called in two scenarios: if a timeout |
| 448 | * occurs or if a response frame is received for the exchange. The |
| 449 | * fc_frame pointer in response handler will also indicate timeout |
| 450 | * as error using IS_ERR related macros. |
| 451 | * |
| 452 | * The exchange destructor handler is also set in this routine. |
| 453 | * The destructor handler is invoked by EM layer when exchange |
| 454 | * is about to free, this can be used by caller to free its |
| 455 | * resources along with exchange free. |
| 456 | * |
| 457 | * The arg is passed back to resp and destructor handler. |
| 458 | * |
| 459 | * The timeout value (in msec) for an exchange is set if non zero |
| 460 | * timer_msec argument is specified. The timer is canceled when |
| 461 | * it fires or when the exchange is done. The exchange timeout handler |
| 462 | * is registered by EM layer. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 463 | * |
| 464 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 465 | */ |
| 466 | struct fc_seq *(*exch_seq_send)(struct fc_lport *lp, |
| 467 | struct fc_frame *fp, |
| 468 | void (*resp)(struct fc_seq *sp, |
| 469 | struct fc_frame *fp, |
| 470 | void *arg), |
| 471 | void (*destructor)(struct fc_seq *sp, |
| 472 | void *arg), |
| 473 | void *arg, unsigned int timer_msec); |
| 474 | |
| 475 | /* |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 476 | * Sets up the DDP context for a given exchange id on the given |
| 477 | * scatterlist if LLD supports DDP for large receive. |
| 478 | * |
| 479 | * STATUS: OPTIONAL |
| 480 | */ |
| 481 | int (*ddp_setup)(struct fc_lport *lp, u16 xid, |
| 482 | struct scatterlist *sgl, unsigned int sgc); |
| 483 | /* |
| 484 | * Completes the DDP transfer and returns the length of data DDPed |
| 485 | * for the given exchange id. |
| 486 | * |
| 487 | * STATUS: OPTIONAL |
| 488 | */ |
| 489 | int (*ddp_done)(struct fc_lport *lp, u16 xid); |
| 490 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 491 | * Send a frame using an existing sequence and exchange. |
| 492 | * |
| 493 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 494 | */ |
| 495 | int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp, |
| 496 | struct fc_frame *fp); |
| 497 | |
| 498 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 499 | * Send an ELS response using infomation from a previous |
| 500 | * exchange and sequence. |
| 501 | * |
| 502 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 503 | */ |
| 504 | void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd, |
| 505 | struct fc_seq_els_data *els_data); |
| 506 | |
| 507 | /* |
| 508 | * Abort an exchange and sequence. Generally called because of a |
| 509 | * exchange timeout or an abort from the upper layer. |
| 510 | * |
| 511 | * A timer_msec can be specified for abort timeout, if non-zero |
| 512 | * timer_msec value is specified then exchange resp handler |
| 513 | * will be called with timeout error if no response to abort. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 514 | * |
| 515 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 516 | */ |
| 517 | int (*seq_exch_abort)(const struct fc_seq *req_sp, |
| 518 | unsigned int timer_msec); |
| 519 | |
| 520 | /* |
| 521 | * Indicate that an exchange/sequence tuple is complete and the memory |
| 522 | * allocated for the related objects may be freed. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 523 | * |
| 524 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 525 | */ |
| 526 | void (*exch_done)(struct fc_seq *sp); |
| 527 | |
| 528 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 529 | * Start a new sequence on the same exchange/sequence tuple. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 530 | * |
| 531 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 532 | */ |
| 533 | struct fc_seq *(*seq_start_next)(struct fc_seq *sp); |
| 534 | |
| 535 | /* |
| 536 | * Reset an exchange manager, completing all sequences and exchanges. |
| 537 | * If s_id is non-zero, reset only exchanges originating from that FID. |
| 538 | * 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] | 539 | * |
| 540 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 541 | */ |
Abhijeet Joglekar | 1f6ff36 | 2009-02-27 10:54:35 -0800 | [diff] [blame] | 542 | void (*exch_mgr_reset)(struct fc_lport *, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 543 | u32 s_id, u32 d_id); |
| 544 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 545 | /* |
| 546 | * Flush the rport work queue. Generally used before shutdown. |
| 547 | * |
| 548 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 549 | */ |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 550 | void (*rport_flush_queue)(void); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 551 | |
| 552 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 553 | * Receive a frame for a local port. |
| 554 | * |
| 555 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 556 | */ |
| 557 | void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp, |
| 558 | struct fc_frame *fp); |
| 559 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 560 | /* |
| 561 | * Reset the local port. |
| 562 | * |
| 563 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 564 | */ |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 565 | int (*lport_reset)(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 566 | |
| 567 | /* |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame^] | 568 | * Create a remote port with a given port ID |
| 569 | * |
| 570 | * STATUS: OPTIONAL |
Robert Love | 5101ff9 | 2009-02-27 10:55:18 -0800 | [diff] [blame] | 571 | */ |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame^] | 572 | struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32); |
Robert Love | 5101ff9 | 2009-02-27 10:55:18 -0800 | [diff] [blame] | 573 | |
| 574 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 575 | * Initiates the RP state machine. It is called from the LP module. |
| 576 | * This function will issue the following commands to the N_Port |
| 577 | * identified by the FC ID provided. |
| 578 | * |
| 579 | * - PLOGI |
| 580 | * - PRLI |
| 581 | * - RTV |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 582 | * |
| 583 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 584 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 585 | int (*rport_login)(struct fc_rport_priv *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 586 | |
| 587 | /* |
| 588 | * Logoff, and remove the rport from the transport if |
| 589 | * it had been added. This will send a LOGO to the target. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 590 | * |
| 591 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 592 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 593 | int (*rport_logoff)(struct fc_rport_priv *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 594 | |
| 595 | /* |
| 596 | * Recieve a request from a remote port. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 597 | * |
| 598 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 599 | */ |
| 600 | void (*rport_recv_req)(struct fc_seq *, struct fc_frame *, |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 601 | struct fc_rport_priv *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 602 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 603 | /* |
| 604 | * lookup an rport by it's port ID. |
| 605 | * |
| 606 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 607 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 608 | struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 609 | |
| 610 | /* |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 611 | * Destroy an rport after final kref_put(). |
| 612 | * The argument is a pointer to the kref inside the fc_rport_priv. |
| 613 | */ |
| 614 | void (*rport_destroy)(struct kref *); |
| 615 | |
| 616 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 617 | * Send a fcp cmd from fsp pkt. |
| 618 | * Called with the SCSI host lock unlocked and irqs disabled. |
| 619 | * |
| 620 | * The resp handler is called when FCP_RSP received. |
| 621 | * |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 622 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 623 | */ |
| 624 | int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp, |
| 625 | void (*resp)(struct fc_seq *, struct fc_frame *fp, |
| 626 | void *arg)); |
| 627 | |
| 628 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 629 | * Cleanup the FCP layer, used durring link down and reset |
| 630 | * |
| 631 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 632 | */ |
| 633 | void (*fcp_cleanup)(struct fc_lport *lp); |
| 634 | |
| 635 | /* |
| 636 | * Abort all I/O on a local port |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 637 | * |
| 638 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 639 | */ |
| 640 | void (*fcp_abort_io)(struct fc_lport *lp); |
| 641 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 642 | /* |
| 643 | * Receive a request for the discovery layer. |
| 644 | * |
| 645 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 646 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 647 | void (*disc_recv_req)(struct fc_seq *, |
| 648 | struct fc_frame *, struct fc_lport *); |
| 649 | |
| 650 | /* |
| 651 | * Start discovery for a local port. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 652 | * |
| 653 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 654 | */ |
| 655 | void (*disc_start)(void (*disc_callback)(struct fc_lport *, |
| 656 | enum fc_disc_event), |
| 657 | struct fc_lport *); |
| 658 | |
| 659 | /* |
| 660 | * Stop discovery for a given lport. This will remove |
| 661 | * all discovered rports |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 662 | * |
| 663 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 664 | */ |
| 665 | void (*disc_stop) (struct fc_lport *); |
| 666 | |
| 667 | /* |
| 668 | * Stop discovery for a given lport. This will block |
| 669 | * until all discovered rports are deleted from the |
| 670 | * FC transport class |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 671 | * |
| 672 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 673 | */ |
| 674 | void (*disc_stop_final) (struct fc_lport *); |
| 675 | }; |
| 676 | |
| 677 | /* information used by the discovery layer */ |
| 678 | struct fc_disc { |
| 679 | unsigned char retry_count; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 680 | unsigned char pending; |
| 681 | unsigned char requested; |
| 682 | unsigned short seq_count; |
| 683 | unsigned char buf_len; |
Joe Eykholt | 0f6c614 | 2009-08-25 14:02:11 -0700 | [diff] [blame] | 684 | u16 disc_id; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 685 | |
| 686 | void (*disc_callback)(struct fc_lport *, |
| 687 | enum fc_disc_event); |
| 688 | |
| 689 | struct list_head rports; |
| 690 | struct fc_lport *lport; |
| 691 | struct mutex disc_mutex; |
| 692 | struct fc_gpn_ft_resp partial_buf; /* partial name buffer */ |
| 693 | struct delayed_work disc_work; |
| 694 | }; |
| 695 | |
| 696 | struct fc_lport { |
| 697 | struct list_head list; |
| 698 | |
| 699 | /* Associations */ |
| 700 | struct Scsi_Host *host; |
Vasu Dev | 9631609 | 2009-07-29 17:05:00 -0700 | [diff] [blame] | 701 | struct list_head ema_list; |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 702 | struct fc_rport_priv *dns_rp; |
| 703 | struct fc_rport_priv *ptp_rp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 704 | void *scsi_priv; |
| 705 | struct fc_disc disc; |
| 706 | |
| 707 | /* Operational Information */ |
| 708 | struct libfc_function_template tt; |
Vasu Dev | bc0e17f | 2009-02-27 10:54:57 -0800 | [diff] [blame] | 709 | u8 link_up; |
| 710 | u8 qfull; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 711 | enum fc_lport_state state; |
| 712 | unsigned long boot_time; |
| 713 | |
| 714 | struct fc_host_statistics host_stats; |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 715 | struct fcoe_dev_stats *dev_stats; |
| 716 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 717 | u64 wwpn; |
| 718 | u64 wwnn; |
| 719 | u8 retry_count; |
| 720 | |
| 721 | /* Capabilities */ |
| 722 | u32 sg_supp:1; /* scatter gather supported */ |
| 723 | u32 seq_offload:1; /* seq offload supported */ |
| 724 | u32 crc_offload:1; /* crc offload supported */ |
| 725 | u32 lro_enabled:1; /* large receive offload */ |
| 726 | u32 mfs; /* max FC payload size */ |
| 727 | unsigned int service_params; |
| 728 | unsigned int e_d_tov; |
| 729 | unsigned int r_a_tov; |
| 730 | u8 max_retry_count; |
Abhijeet Joglekar | a366695 | 2009-05-01 10:01:26 -0700 | [diff] [blame] | 731 | u8 max_rport_retry_count; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 732 | u16 link_speed; |
| 733 | u16 link_supported_speeds; |
| 734 | u16 lro_xid; /* max xid for fcoe lro */ |
Yi Zou | ea1e9a9 | 2009-02-27 14:07:04 -0800 | [diff] [blame] | 735 | unsigned int lso_max; /* max large send size */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 736 | struct fc_ns_fts fcts; /* FC-4 type masks */ |
| 737 | struct fc_els_rnid_gen rnid_gen; /* RNID information */ |
| 738 | |
| 739 | /* Semaphores */ |
| 740 | struct mutex lp_mutex; |
| 741 | |
| 742 | /* Miscellaneous */ |
| 743 | struct delayed_work retry_work; |
| 744 | struct delayed_work disc_work; |
| 745 | }; |
| 746 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 747 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 748 | * FC_LPORT HELPER FUNCTIONS |
| 749 | *****************************/ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 750 | static inline int fc_lport_test_ready(struct fc_lport *lp) |
| 751 | { |
| 752 | return lp->state == LPORT_ST_READY; |
| 753 | } |
| 754 | |
| 755 | static inline void fc_set_wwnn(struct fc_lport *lp, u64 wwnn) |
| 756 | { |
| 757 | lp->wwnn = wwnn; |
| 758 | } |
| 759 | |
| 760 | static inline void fc_set_wwpn(struct fc_lport *lp, u64 wwnn) |
| 761 | { |
| 762 | lp->wwpn = wwnn; |
| 763 | } |
| 764 | |
| 765 | static inline void fc_lport_state_enter(struct fc_lport *lp, |
| 766 | enum fc_lport_state state) |
| 767 | { |
| 768 | if (state != lp->state) |
| 769 | lp->retry_count = 0; |
| 770 | lp->state = state; |
| 771 | } |
| 772 | |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 773 | static inline int fc_lport_init_stats(struct fc_lport *lp) |
| 774 | { |
| 775 | /* allocate per cpu stats block */ |
| 776 | lp->dev_stats = alloc_percpu(struct fcoe_dev_stats); |
| 777 | if (!lp->dev_stats) |
| 778 | return -ENOMEM; |
| 779 | return 0; |
| 780 | } |
| 781 | |
| 782 | static inline void fc_lport_free_stats(struct fc_lport *lp) |
| 783 | { |
| 784 | free_percpu(lp->dev_stats); |
| 785 | } |
| 786 | |
| 787 | static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lp) |
| 788 | { |
| 789 | return per_cpu_ptr(lp->dev_stats, smp_processor_id()); |
| 790 | } |
| 791 | |
Vasu Dev | a0a25da | 2009-03-17 11:42:29 -0700 | [diff] [blame] | 792 | static inline void *lport_priv(const struct fc_lport *lp) |
| 793 | { |
| 794 | return (void *)(lp + 1); |
| 795 | } |
| 796 | |
| 797 | /** |
| 798 | * libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport |
| 799 | * @sht: ptr to the scsi host templ |
| 800 | * @priv_size: size of private data after fc_lport |
| 801 | * |
| 802 | * Returns: ptr to Scsi_Host |
| 803 | */ |
| 804 | static inline struct Scsi_Host * |
| 805 | libfc_host_alloc(struct scsi_host_template *sht, int priv_size) |
| 806 | { |
| 807 | return scsi_host_alloc(sht, sizeof(struct fc_lport) + priv_size); |
| 808 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 809 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 810 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 811 | * LOCAL PORT LAYER |
| 812 | *****************************/ |
| 813 | int fc_lport_init(struct fc_lport *lp); |
| 814 | |
| 815 | /* |
| 816 | * Destroy the specified local port by finding and freeing all |
| 817 | * fc_rports associated with it and then by freeing the fc_lport |
| 818 | * itself. |
| 819 | */ |
| 820 | int fc_lport_destroy(struct fc_lport *lp); |
| 821 | |
| 822 | /* |
| 823 | * Logout the specified local port from the fabric |
| 824 | */ |
| 825 | int fc_fabric_logoff(struct fc_lport *lp); |
| 826 | |
| 827 | /* |
| 828 | * Initiate the LP state machine. This handler will use fc_host_attr |
| 829 | * to store the FLOGI service parameters, so fc_host_attr must be |
| 830 | * initialized before calling this handler. |
| 831 | */ |
| 832 | int fc_fabric_login(struct fc_lport *lp); |
| 833 | |
| 834 | /* |
| 835 | * The link is up for the given local port. |
| 836 | */ |
| 837 | void fc_linkup(struct fc_lport *); |
| 838 | |
| 839 | /* |
| 840 | * Link is down for the given local port. |
| 841 | */ |
| 842 | void fc_linkdown(struct fc_lport *); |
| 843 | |
| 844 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 845 | * Configure the local port. |
| 846 | */ |
| 847 | int fc_lport_config(struct fc_lport *); |
| 848 | |
| 849 | /* |
| 850 | * Reset the local port. |
| 851 | */ |
| 852 | int fc_lport_reset(struct fc_lport *); |
| 853 | |
| 854 | /* |
| 855 | * Set the mfs or reset |
| 856 | */ |
| 857 | int fc_set_mfs(struct fc_lport *lp, u32 mfs); |
| 858 | |
| 859 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 860 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 861 | * REMOTE PORT LAYER |
| 862 | *****************************/ |
| 863 | int fc_rport_init(struct fc_lport *lp); |
| 864 | void fc_rport_terminate_io(struct fc_rport *rp); |
| 865 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 866 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 867 | * DISCOVERY LAYER |
| 868 | *****************************/ |
| 869 | int fc_disc_init(struct fc_lport *lp); |
| 870 | |
| 871 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 872 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 873 | * SCSI LAYER |
| 874 | *****************************/ |
| 875 | /* |
| 876 | * Initialize the SCSI block of libfc |
| 877 | */ |
| 878 | int fc_fcp_init(struct fc_lport *); |
| 879 | |
| 880 | /* |
| 881 | * This section provides an API which allows direct interaction |
| 882 | * with the SCSI-ml. Each of these functions satisfies a function |
| 883 | * pointer defined in Scsi_Host and therefore is always called |
| 884 | * directly from the SCSI-ml. |
| 885 | */ |
| 886 | int fc_queuecommand(struct scsi_cmnd *sc_cmd, |
| 887 | void (*done)(struct scsi_cmnd *)); |
| 888 | |
| 889 | /* |
| 890 | * complete processing of a fcp packet |
| 891 | * |
| 892 | * This function may sleep if a fsp timer is pending. |
| 893 | * The host lock must not be held by caller. |
| 894 | */ |
| 895 | void fc_fcp_complete(struct fc_fcp_pkt *fsp); |
| 896 | |
| 897 | /* |
| 898 | * Send an ABTS frame to the target device. The sc_cmd argument |
| 899 | * is a pointer to the SCSI command to be aborted. |
| 900 | */ |
| 901 | int fc_eh_abort(struct scsi_cmnd *sc_cmd); |
| 902 | |
| 903 | /* |
| 904 | * Reset a LUN by sending send the tm cmd to the target. |
| 905 | */ |
| 906 | int fc_eh_device_reset(struct scsi_cmnd *sc_cmd); |
| 907 | |
| 908 | /* |
| 909 | * Reset the host adapter. |
| 910 | */ |
| 911 | int fc_eh_host_reset(struct scsi_cmnd *sc_cmd); |
| 912 | |
| 913 | /* |
| 914 | * Check rport status. |
| 915 | */ |
| 916 | int fc_slave_alloc(struct scsi_device *sdev); |
| 917 | |
| 918 | /* |
| 919 | * Adjust the queue depth. |
| 920 | */ |
| 921 | int fc_change_queue_depth(struct scsi_device *sdev, int qdepth); |
| 922 | |
| 923 | /* |
| 924 | * Change the tag type. |
| 925 | */ |
| 926 | int fc_change_queue_type(struct scsi_device *sdev, int tag_type); |
| 927 | |
| 928 | /* |
| 929 | * Free memory pools used by the FCP layer. |
| 930 | */ |
| 931 | void fc_fcp_destroy(struct fc_lport *); |
| 932 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 933 | /* |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 934 | * Set up direct-data placement for this I/O request |
| 935 | */ |
| 936 | void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid); |
| 937 | |
| 938 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 939 | * ELS/CT interface |
| 940 | *****************************/ |
| 941 | /* |
| 942 | * Initializes ELS/CT interface |
| 943 | */ |
| 944 | int fc_elsct_init(struct fc_lport *lp); |
| 945 | |
| 946 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 947 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 948 | * EXCHANGE MANAGER LAYER |
| 949 | *****************************/ |
| 950 | /* |
| 951 | * Initializes Exchange Manager related |
| 952 | * function pointers in struct libfc_function_template. |
| 953 | */ |
| 954 | int fc_exch_init(struct fc_lport *lp); |
| 955 | |
| 956 | /* |
Vasu Dev | 9631609 | 2009-07-29 17:05:00 -0700 | [diff] [blame] | 957 | * Adds Exchange Manager (EM) mp to lport. |
| 958 | * |
| 959 | * Adds specified mp to lport using struct fc_exch_mgr_anchor, |
| 960 | * the struct fc_exch_mgr_anchor allows same EM sharing by |
| 961 | * more than one lport with their specified match function, |
| 962 | * the match function is used in allocating exchange from |
| 963 | * added mp. |
| 964 | */ |
| 965 | struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport, |
| 966 | struct fc_exch_mgr *mp, |
| 967 | bool (*match)(struct fc_frame *)); |
| 968 | |
| 969 | /* |
| 970 | * Deletes Exchange Manager (EM) from lport by removing |
| 971 | * its anchor ema from lport. |
| 972 | * |
| 973 | * If removed anchor ema was the last user of its associated EM |
| 974 | * then also destroys associated EM. |
| 975 | */ |
| 976 | void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema); |
| 977 | |
| 978 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 979 | * Allocates an Exchange Manager (EM). |
| 980 | * |
| 981 | * The EM manages exchanges for their allocation and |
| 982 | * free, also allows exchange lookup for received |
| 983 | * frame. |
| 984 | * |
| 985 | * The class is used for initializing FC class of |
| 986 | * allocated exchange from EM. |
| 987 | * |
| 988 | * The min_xid and max_xid will limit new |
| 989 | * exchange ID (XID) within this range for |
| 990 | * a new exchange. |
| 991 | * The LLD may choose to have multiple EMs, |
| 992 | * e.g. one EM instance per CPU receive thread in LLD. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 993 | * |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 994 | * Specified match function is used in allocating exchanges |
| 995 | * from newly allocated EM. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 996 | */ |
| 997 | struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp, |
| 998 | enum fc_class class, |
| 999 | u16 min_xid, |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 1000 | u16 max_xid, |
| 1001 | bool (*match)(struct fc_frame *)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1002 | |
| 1003 | /* |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 1004 | * Free all exchange managers of a lport. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1005 | */ |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 1006 | void fc_exch_mgr_free(struct fc_lport *lport); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1007 | |
| 1008 | /* |
| 1009 | * Receive a frame on specified local port and exchange manager. |
| 1010 | */ |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 1011 | void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1012 | |
| 1013 | /* |
| 1014 | * This function is for exch_seq_send function pointer in |
| 1015 | * struct libfc_function_template, see comment block on |
| 1016 | * exch_seq_send for description of this function. |
| 1017 | */ |
| 1018 | struct fc_seq *fc_exch_seq_send(struct fc_lport *lp, |
| 1019 | struct fc_frame *fp, |
| 1020 | void (*resp)(struct fc_seq *sp, |
| 1021 | struct fc_frame *fp, |
| 1022 | void *arg), |
| 1023 | void (*destructor)(struct fc_seq *sp, |
| 1024 | void *arg), |
| 1025 | void *arg, u32 timer_msec); |
| 1026 | |
| 1027 | /* |
| 1028 | * send a frame using existing sequence and exchange. |
| 1029 | */ |
| 1030 | int fc_seq_send(struct fc_lport *lp, struct fc_seq *sp, struct fc_frame *fp); |
| 1031 | |
| 1032 | /* |
| 1033 | * Send ELS response using mainly infomation |
| 1034 | * in exchange and sequence in EM layer. |
| 1035 | */ |
| 1036 | void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd, |
| 1037 | struct fc_seq_els_data *els_data); |
| 1038 | |
| 1039 | /* |
| 1040 | * This function is for seq_exch_abort function pointer in |
| 1041 | * struct libfc_function_template, see comment block on |
| 1042 | * seq_exch_abort for description of this function. |
| 1043 | */ |
| 1044 | int fc_seq_exch_abort(const struct fc_seq *req_sp, unsigned int timer_msec); |
| 1045 | |
| 1046 | /* |
| 1047 | * Indicate that an exchange/sequence tuple is complete and the memory |
| 1048 | * allocated for the related objects may be freed. |
| 1049 | */ |
| 1050 | void fc_exch_done(struct fc_seq *sp); |
| 1051 | |
| 1052 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1053 | * Allocate a new exchange and sequence pair. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1054 | */ |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 1055 | struct fc_exch *fc_exch_alloc(struct fc_lport *lport, struct fc_frame *fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1056 | /* |
| 1057 | * Start a new sequence on the same exchange as the supplied sequence. |
| 1058 | */ |
| 1059 | struct fc_seq *fc_seq_start_next(struct fc_seq *sp); |
| 1060 | |
Vasu Dev | b2f0091 | 2009-08-25 13:58:53 -0700 | [diff] [blame] | 1061 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1062 | /* |
Vasu Dev | b2f0091 | 2009-08-25 13:58:53 -0700 | [diff] [blame] | 1063 | * Reset all EMs of a lport, releasing its all sequences and |
| 1064 | * exchanges. If sid is non-zero, then reset only exchanges |
| 1065 | * we sourced from that FID. If did is non-zero, reset only |
| 1066 | * exchanges destined to that FID. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1067 | */ |
Abhijeet Joglekar | 1f6ff36 | 2009-02-27 10:54:35 -0800 | [diff] [blame] | 1068 | 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] | 1069 | |
| 1070 | /* |
| 1071 | * Functions for fc_functions_template |
| 1072 | */ |
| 1073 | void fc_get_host_speed(struct Scsi_Host *shost); |
| 1074 | void fc_get_host_port_type(struct Scsi_Host *shost); |
| 1075 | void fc_get_host_port_state(struct Scsi_Host *shost); |
| 1076 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout); |
| 1077 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); |
| 1078 | |
| 1079 | /* |
| 1080 | * module setup functions. |
| 1081 | */ |
| 1082 | int fc_setup_exch_mgr(void); |
| 1083 | void fc_destroy_exch_mgr(void); |
| 1084 | int fc_setup_rport(void); |
| 1085 | void fc_destroy_rport(void); |
| 1086 | |
| 1087 | #endif /* _LIBFC_H_ */ |