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 | |
Joe Eykholt | 96ad846 | 2011-01-28 16:04:02 -0800 | [diff] [blame] | 38 | #define FC_FC4_PROV_SIZE (FC_TYPE_FCP + 1) /* size of tables */ |
| 39 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 40 | /* |
| 41 | * libfc error codes |
| 42 | */ |
| 43 | #define FC_NO_ERR 0 /* no error */ |
| 44 | #define FC_EX_TIMEOUT 1 /* Exchange timeout */ |
| 45 | #define FC_EX_CLOSED 2 /* Exchange closed */ |
| 46 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 47 | /** |
| 48 | * enum fc_lport_state - Local port states |
| 49 | * @LPORT_ST_DISABLED: Disabled |
| 50 | * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent |
| 51 | * @LPORT_ST_DNS: Waiting for name server remote port to become ready |
| 52 | * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent |
| 53 | * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent |
Joe Eykholt | ab593b1 | 2009-11-03 11:49:27 -0800 | [diff] [blame] | 54 | * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 55 | * @LPORT_ST_SCR: State Change Register (SCR) sent |
| 56 | * @LPORT_ST_READY: Ready for use |
| 57 | * @LPORT_ST_LOGO: Local port logout (LOGO) sent |
| 58 | * @LPORT_ST_RESET: Local port reset |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 59 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 60 | enum fc_lport_state { |
Joe Eykholt | b1d9fd5 | 2009-07-29 17:04:22 -0700 | [diff] [blame] | 61 | LPORT_ST_DISABLED = 0, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 62 | LPORT_ST_FLOGI, |
| 63 | LPORT_ST_DNS, |
Chris Leech | c9c7bd7 | 2009-11-03 11:46:51 -0800 | [diff] [blame] | 64 | LPORT_ST_RNN_ID, |
Chris Leech | 5baa17c | 2009-11-03 11:46:56 -0800 | [diff] [blame] | 65 | LPORT_ST_RSNN_NN, |
Chris Leech | c9866a5 | 2009-11-03 11:47:01 -0800 | [diff] [blame] | 66 | LPORT_ST_RSPN_ID, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 67 | LPORT_ST_RFT_ID, |
Joe Eykholt | ab593b1 | 2009-11-03 11:49:27 -0800 | [diff] [blame] | 68 | LPORT_ST_RFF_ID, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 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 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 81 | /** |
| 82 | * enum fc_rport_state - Remote port states |
| 83 | * @RPORT_ST_INIT: Initialized |
Joe Eykholt | a7b12a2 | 2010-07-20 15:20:08 -0700 | [diff] [blame] | 84 | * @RPORT_ST_FLOGI: Waiting for FLOGI completion for point-to-multipoint |
| 85 | * @RPORT_ST_PLOGI_WAIT: Waiting for peer to login for point-to-multipoint |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 86 | * @RPORT_ST_PLOGI: Waiting for PLOGI completion |
| 87 | * @RPORT_ST_PRLI: Waiting for PRLI completion |
| 88 | * @RPORT_ST_RTV: Waiting for RTV completion |
| 89 | * @RPORT_ST_READY: Ready for use |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 90 | * @RPORT_ST_ADISC: Discover Address sent |
| 91 | * @RPORT_ST_DELETE: Remote port being deleted |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 92 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 93 | enum fc_rport_state { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 94 | RPORT_ST_INIT, |
Joe Eykholt | a7b12a2 | 2010-07-20 15:20:08 -0700 | [diff] [blame] | 95 | RPORT_ST_FLOGI, |
| 96 | RPORT_ST_PLOGI_WAIT, |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 97 | RPORT_ST_PLOGI, |
| 98 | RPORT_ST_PRLI, |
| 99 | RPORT_ST_RTV, |
| 100 | RPORT_ST_READY, |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 101 | RPORT_ST_ADISC, |
| 102 | RPORT_ST_DELETE, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 103 | }; |
| 104 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 105 | /** |
| 106 | * struct fc_disc_port - temporary discovery port to hold rport identifiers |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 107 | * @lp: Fibre Channel host port instance |
| 108 | * @peers: Node for list management during discovery and RSCN processing |
| 109 | * @rport_work: Work struct for starting the rport state machine |
| 110 | * @port_id: Port ID of the discovered port |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 111 | */ |
| 112 | struct fc_disc_port { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 113 | struct fc_lport *lp; |
| 114 | struct list_head peers; |
| 115 | struct work_struct rport_work; |
| 116 | u32 port_id; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 117 | }; |
| 118 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 119 | /** |
| 120 | * enum fc_rport_event - Remote port events |
| 121 | * @RPORT_EV_NONE: No event |
| 122 | * @RPORT_EV_READY: Remote port is ready for use |
| 123 | * @RPORT_EV_FAILED: State machine failed, remote port is not ready |
| 124 | * @RPORT_EV_STOP: Remote port has been stopped |
| 125 | * @RPORT_EV_LOGO: Remote port logout (LOGO) sent |
| 126 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 127 | enum fc_rport_event { |
| 128 | RPORT_EV_NONE = 0, |
Joe Eykholt | 4c0f62b | 2009-08-25 14:01:12 -0700 | [diff] [blame] | 129 | RPORT_EV_READY, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 130 | RPORT_EV_FAILED, |
| 131 | RPORT_EV_STOP, |
| 132 | RPORT_EV_LOGO |
| 133 | }; |
| 134 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 135 | struct fc_rport_priv; |
| 136 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 137 | /** |
| 138 | * struct fc_rport_operations - Operations for a remote port |
| 139 | * @event_callback: Function to be called for remote port events |
| 140 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 141 | struct fc_rport_operations { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 142 | void (*event_callback)(struct fc_lport *, struct fc_rport_priv *, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 143 | enum fc_rport_event); |
| 144 | }; |
| 145 | |
| 146 | /** |
| 147 | * struct fc_rport_libfc_priv - libfc internal information about a remote port |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 148 | * @local_port: The associated local port |
| 149 | * @rp_state: Indicates READY for I/O or DELETE when blocked |
| 150 | * @flags: REC and RETRY supported flags |
| 151 | * @e_d_tov: Error detect timeout value (in msec) |
| 152 | * @r_a_tov: Resource allocation timeout value (in msec) |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 153 | */ |
| 154 | struct fc_rport_libfc_priv { |
| 155 | struct fc_lport *local_port; |
| 156 | enum fc_rport_state rp_state; |
| 157 | u16 flags; |
| 158 | #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0) |
| 159 | #define FC_RP_FLAGS_RETRY (1 << 1) |
Joe Eykholt | 4b2164d | 2010-06-11 16:44:51 -0700 | [diff] [blame] | 160 | #define FC_RP_STARTED (1 << 2) |
Bhanu Prakash Gollapudi | 75a2792 | 2011-01-28 16:05:27 -0800 | [diff] [blame] | 161 | #define FC_RP_FLAGS_CONF_REQ (1 << 3) |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 162 | unsigned int e_d_tov; |
| 163 | unsigned int r_a_tov; |
| 164 | }; |
| 165 | |
| 166 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 167 | * struct fc_rport_priv - libfc remote port and discovery info |
| 168 | * @local_port: The associated local port |
| 169 | * @rport: The FC transport remote port |
| 170 | * @kref: Reference counter |
| 171 | * @rp_state: Enumeration that tracks progress of PLOGI, PRLI, |
| 172 | * and RTV exchanges |
| 173 | * @ids: The remote port identifiers and roles |
Joe Eykholt | 4b2164d | 2010-06-11 16:44:51 -0700 | [diff] [blame] | 174 | * @flags: STARTED, REC and RETRY_SUPPORTED flags |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 175 | * @max_seq: Maximum number of concurrent sequences |
| 176 | * @disc_id: The discovery identifier |
| 177 | * @maxframe_size: The maximum frame size |
| 178 | * @retries: The retry count for the current state |
Joe Eykholt | f034260 | 2010-06-11 16:44:57 -0700 | [diff] [blame] | 179 | * @major_retries: The retry count for the entire PLOGI/PRLI state machine |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 180 | * @e_d_tov: Error detect timeout value (in msec) |
| 181 | * @r_a_tov: Resource allocation timeout value (in msec) |
| 182 | * @rp_mutex: The mutex that protects the remote port |
| 183 | * @retry_work: Handle for retries |
| 184 | * @event_callback: Callback when READY, FAILED or LOGO states complete |
Joe Eykholt | 96ad846 | 2011-01-28 16:04:02 -0800 | [diff] [blame] | 185 | * @prli_count: Count of open PRLI sessions in providers |
Joe Eykholt | 42e9041 | 2010-07-20 15:19:37 -0700 | [diff] [blame] | 186 | * @rcu: Structure used for freeing in an RCU-safe manner |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 187 | */ |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 188 | struct fc_rport_priv { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 189 | struct fc_lport *local_port; |
| 190 | struct fc_rport *rport; |
| 191 | struct kref kref; |
| 192 | enum fc_rport_state rp_state; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 193 | struct fc_rport_identifiers ids; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 194 | u16 flags; |
| 195 | u16 max_seq; |
| 196 | u16 disc_id; |
| 197 | u16 maxframe_size; |
| 198 | unsigned int retries; |
Joe Eykholt | f034260 | 2010-06-11 16:44:57 -0700 | [diff] [blame] | 199 | unsigned int major_retries; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 200 | unsigned int e_d_tov; |
| 201 | unsigned int r_a_tov; |
| 202 | struct mutex rp_mutex; |
| 203 | struct delayed_work retry_work; |
| 204 | enum fc_rport_event event; |
| 205 | struct fc_rport_operations *ops; |
| 206 | struct list_head peers; |
| 207 | struct work_struct event_work; |
| 208 | u32 supported_classes; |
Joe Eykholt | 96ad846 | 2011-01-28 16:04:02 -0800 | [diff] [blame] | 209 | u16 prli_count; |
Joe Eykholt | 42e9041 | 2010-07-20 15:19:37 -0700 | [diff] [blame] | 210 | struct rcu_head rcu; |
Bhanu Prakash Gollapudi | 75a2792 | 2011-01-28 16:05:27 -0800 | [diff] [blame] | 211 | u16 sp_features; |
| 212 | u8 spp_type; |
| 213 | void (*lld_event_callback)(struct fc_lport *, |
| 214 | struct fc_rport_priv *, |
| 215 | enum fc_rport_event); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 216 | }; |
| 217 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 218 | /** |
| 219 | * struct fcoe_dev_stats - fcoe stats structure |
| 220 | * @SecondsSinceLastReset: Seconds since the last reset |
| 221 | * @TxFrames: Number of transmitted frames |
| 222 | * @TxWords: Number of transmitted words |
| 223 | * @RxFrames: Number of received frames |
| 224 | * @RxWords: Number of received words |
| 225 | * @ErrorFrames: Number of received error frames |
| 226 | * @DumpedFrames: Number of dumped frames |
| 227 | * @LinkFailureCount: Number of link failures |
| 228 | * @LossOfSignalCount: Number for signal losses |
| 229 | * @InvalidTxWordCount: Number of invalid transmitted words |
| 230 | * @InvalidCRCCount: Number of invalid CRCs |
| 231 | * @InputRequests: Number of input requests |
| 232 | * @OutputRequests: Number of output requests |
| 233 | * @ControlRequests: Number of control requests |
Joe Eykholt | 5f0e385 | 2010-11-30 16:20:18 -0800 | [diff] [blame] | 234 | * @InputBytes: Number of received bytes |
| 235 | * @OutputBytes: Number of transmitted bytes |
Yi Zou | 6580bbd | 2009-11-20 14:54:52 -0800 | [diff] [blame] | 236 | * @VLinkFailureCount: Number of virtual link failures |
| 237 | * @MissDiscAdvCount: Number of missing FIP discovery advertisement |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 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; |
Joe Eykholt | 5f0e385 | 2010-11-30 16:20:18 -0800 | [diff] [blame] | 254 | u64 InputBytes; |
| 255 | u64 OutputBytes; |
Yi Zou | 6580bbd | 2009-11-20 14:54:52 -0800 | [diff] [blame] | 256 | u64 VLinkFailureCount; |
| 257 | u64 MissDiscAdvCount; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 258 | }; |
| 259 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 260 | /** |
| 261 | * struct fc_seq_els_data - ELS data used for passing ELS specific responses |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 262 | * @reason: The reason for rejection |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 263 | * @explan: The explanation of the rejection |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 264 | * |
| 265 | * Mainly used by the exchange manager layer. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 266 | */ |
| 267 | struct fc_seq_els_data { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 268 | enum fc_els_rjt_reason reason; |
| 269 | enum fc_els_rjt_explan explan; |
| 270 | }; |
| 271 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 272 | /** |
| 273 | * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request) |
| 274 | * @lp: The associated local port |
| 275 | * @state: The state of the I/O |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 276 | * @ref_cnt: Reference count |
| 277 | * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the |
| 278 | * host_lock if both are to be held at the same time) |
| 279 | * @cmd: The SCSI command (set and clear with the host_lock held) |
| 280 | * @list: Tracks queued commands (accessed with the host_lock held) |
| 281 | * @timer: The command timer |
| 282 | * @tm_done: Completion indicator |
| 283 | * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies) |
| 284 | * @start_time: Timestamp indicating the start of the I/O (in jiffies) |
| 285 | * @end_time: Timestamp indicating the end of the I/O (in jiffies) |
| 286 | * @last_pkt_time: Timestamp of the last frame received (in jiffies) |
| 287 | * @data_len: The length of the data |
| 288 | * @cdb_cmd: The CDB command |
| 289 | * @xfer_len: The transfer length |
| 290 | * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange |
| 291 | * will be set here if DDP was setup) |
| 292 | * @xfer_contig_end: The offset into the buffer if the buffer is contiguous |
| 293 | * (Tx and Rx) |
| 294 | * @max_payload: The maximum payload size (in bytes) |
| 295 | * @io_status: SCSI result (upper 24 bits) |
| 296 | * @cdb_status: CDB status |
| 297 | * @status_code: FCP I/O status |
| 298 | * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun) |
| 299 | * @req_flags: Request flags (bit 0: read bit:1 write) |
| 300 | * @scsi_resid: SCSI residule length |
| 301 | * @rport: The remote port that the SCSI command is targeted at |
| 302 | * @seq_ptr: The sequence that will carry the SCSI command |
| 303 | * @recov_retry: Number of recovery retries |
| 304 | * @recov_seq: The sequence for REC or SRR |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 305 | */ |
| 306 | struct fc_fcp_pkt { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 307 | /* Housekeeping information */ |
| 308 | struct fc_lport *lp; |
| 309 | u16 state; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 310 | atomic_t ref_cnt; |
| 311 | spinlock_t scsi_pkt_lock; |
| 312 | |
| 313 | /* SCSI I/O related information */ |
| 314 | struct scsi_cmnd *cmd; |
| 315 | struct list_head list; |
| 316 | |
| 317 | /* Timeout related information */ |
| 318 | struct timer_list timer; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 319 | struct completion tm_done; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 320 | int wait_for_comp; |
| 321 | unsigned long start_time; |
| 322 | unsigned long end_time; |
| 323 | unsigned long last_pkt_time; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 324 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 325 | /* SCSI command and data transfer information */ |
| 326 | u32 data_len; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 327 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 328 | /* Transport related veriables */ |
| 329 | struct fcp_cmnd cdb_cmd; |
| 330 | size_t xfer_len; |
| 331 | u16 xfer_ddp; |
| 332 | u32 xfer_contig_end; |
| 333 | u16 max_payload; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 334 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 335 | /* SCSI/FCP return status */ |
| 336 | u32 io_status; |
| 337 | u8 cdb_status; |
| 338 | u8 status_code; |
| 339 | u8 scsi_comp_flags; |
| 340 | u32 req_flags; |
| 341 | u32 scsi_resid; |
| 342 | |
| 343 | /* Associated structures */ |
| 344 | struct fc_rport *rport; |
| 345 | struct fc_seq *seq_ptr; |
| 346 | |
| 347 | /* Error Processing information */ |
| 348 | u8 recov_retry; |
| 349 | struct fc_seq *recov_seq; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 350 | }; |
| 351 | |
| 352 | /* |
| 353 | * Structure and function definitions for managing Fibre Channel Exchanges |
| 354 | * and Sequences |
| 355 | * |
| 356 | * fc_exch holds state for one exchange and links to its active sequence. |
| 357 | * |
| 358 | * fc_seq holds the state for an individual sequence. |
| 359 | */ |
| 360 | |
| 361 | struct fc_exch_mgr; |
Vasu Dev | 9631609 | 2009-07-29 17:05:00 -0700 | [diff] [blame] | 362 | struct fc_exch_mgr_anchor; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 363 | extern u16 fc_cpu_mask; /* cpu mask for possible cpus */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 364 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 365 | /** |
| 366 | * struct fc_seq - FC sequence |
| 367 | * @id: The sequence ID |
| 368 | * @ssb_stat: Status flags for the sequence status block (SSB) |
| 369 | * @cnt: Number of frames sent so far |
| 370 | * @rec_data: FC-4 value for REC |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 371 | */ |
| 372 | struct fc_seq { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 373 | u8 id; |
| 374 | u16 ssb_stat; |
| 375 | u16 cnt; |
| 376 | u32 rec_data; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 377 | }; |
| 378 | |
| 379 | #define FC_EX_DONE (1 << 0) /* ep is completed */ |
| 380 | #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ |
| 381 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 382 | /** |
| 383 | * struct fc_exch - Fibre Channel Exchange |
| 384 | * @em: Exchange manager |
| 385 | * @pool: Exchange pool |
| 386 | * @state: The exchange's state |
| 387 | * @xid: The exchange ID |
| 388 | * @ex_list: Handle used by the EM to track free exchanges |
| 389 | * @ex_lock: Lock that protects the exchange |
| 390 | * @ex_refcnt: Reference count |
| 391 | * @timeout_work: Handle for timeout handler |
| 392 | * @lp: The local port that this exchange is on |
| 393 | * @oxid: Originator's exchange ID |
| 394 | * @rxid: Responder's exchange ID |
| 395 | * @oid: Originator's FCID |
| 396 | * @sid: Source FCID |
| 397 | * @did: Destination FCID |
| 398 | * @esb_stat: ESB exchange status |
| 399 | * @r_a_tov: Resouce allocation time out value (in msecs) |
| 400 | * @seq_id: The next sequence ID to use |
Joe Eykholt | f60e12e | 2010-07-20 15:20:14 -0700 | [diff] [blame] | 401 | * @encaps: encapsulation information for lower-level driver |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 402 | * @f_ctl: F_CTL flags for the sequence |
| 403 | * @fh_type: The frame type |
| 404 | * @class: The class of service |
| 405 | * @seq: The sequence in use on this exchange |
| 406 | * @resp: Callback for responses on this exchange |
| 407 | * @destructor: Called when destroying the exchange |
| 408 | * @arg: Passed as a void pointer to the resp() callback |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 409 | * |
| 410 | * Locking notes: The ex_lock protects following items: |
| 411 | * state, esb_stat, f_ctl, seq.ssb_stat |
| 412 | * seq_id |
| 413 | * sequence allocation |
| 414 | */ |
| 415 | struct fc_exch { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 416 | struct fc_exch_mgr *em; |
| 417 | struct fc_exch_pool *pool; |
| 418 | u32 state; |
| 419 | u16 xid; |
| 420 | struct list_head ex_list; |
| 421 | spinlock_t ex_lock; |
| 422 | atomic_t ex_refcnt; |
| 423 | struct delayed_work timeout_work; |
| 424 | struct fc_lport *lp; |
| 425 | u16 oxid; |
| 426 | u16 rxid; |
| 427 | u32 oid; |
| 428 | u32 sid; |
| 429 | u32 did; |
| 430 | u32 esb_stat; |
| 431 | u32 r_a_tov; |
| 432 | u8 seq_id; |
Joe Eykholt | f60e12e | 2010-07-20 15:20:14 -0700 | [diff] [blame] | 433 | u8 encaps; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 434 | u32 f_ctl; |
| 435 | u8 fh_type; |
| 436 | enum fc_class class; |
| 437 | struct fc_seq seq; |
| 438 | |
| 439 | void (*resp)(struct fc_seq *, struct fc_frame *, void *); |
| 440 | void *arg; |
| 441 | |
| 442 | void (*destructor)(struct fc_seq *, void *); |
| 443 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 444 | }; |
| 445 | #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) |
| 446 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 447 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 448 | struct libfc_function_template { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 449 | /* |
| 450 | * Interface to send a FC frame |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 451 | * |
| 452 | * STATUS: REQUIRED |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 453 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 454 | int (*frame_send)(struct fc_lport *, struct fc_frame *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 455 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 456 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 457 | * Interface to send ELS/CT frames |
| 458 | * |
| 459 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 460 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 461 | struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did, |
| 462 | struct fc_frame *, unsigned int op, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 463 | void (*resp)(struct fc_seq *, |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 464 | struct fc_frame *, void *arg), |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 465 | void *arg, u32 timer_msec); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 466 | |
| 467 | /* |
| 468 | * Send the FC frame payload using a new exchange and sequence. |
| 469 | * |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 470 | * The exchange response handler is set in this routine to resp() |
| 471 | * function pointer. It can be called in two scenarios: if a timeout |
| 472 | * occurs or if a response frame is received for the exchange. The |
| 473 | * fc_frame pointer in response handler will also indicate timeout |
| 474 | * as error using IS_ERR related macros. |
| 475 | * |
| 476 | * The exchange destructor handler is also set in this routine. |
| 477 | * The destructor handler is invoked by EM layer when exchange |
| 478 | * is about to free, this can be used by caller to free its |
| 479 | * resources along with exchange free. |
| 480 | * |
| 481 | * The arg is passed back to resp and destructor handler. |
| 482 | * |
| 483 | * The timeout value (in msec) for an exchange is set if non zero |
| 484 | * timer_msec argument is specified. The timer is canceled when |
| 485 | * it fires or when the exchange is done. The exchange timeout handler |
| 486 | * is registered by EM layer. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 487 | * |
| 488 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 489 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 490 | struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *, |
| 491 | void (*resp)(struct fc_seq *, |
| 492 | struct fc_frame *, |
| 493 | void *), |
| 494 | void (*destructor)(struct fc_seq *, |
| 495 | void *), |
| 496 | void *, unsigned int timer_msec); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 497 | |
| 498 | /* |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 499 | * Sets up the DDP context for a given exchange id on the given |
| 500 | * scatterlist if LLD supports DDP for large receive. |
| 501 | * |
| 502 | * STATUS: OPTIONAL |
| 503 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 504 | int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *, |
| 505 | unsigned int); |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 506 | /* |
| 507 | * Completes the DDP transfer and returns the length of data DDPed |
| 508 | * for the given exchange id. |
| 509 | * |
| 510 | * STATUS: OPTIONAL |
| 511 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 512 | int (*ddp_done)(struct fc_lport *, u16); |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 513 | /* |
Yi Zou | 33dc362 | 2011-06-20 16:59:05 -0700 | [diff] [blame^] | 514 | * Sets up the DDP context for a given exchange id on the given |
| 515 | * scatterlist if LLD supports DDP for FCoE target. |
| 516 | * |
| 517 | * STATUS: OPTIONAL |
| 518 | */ |
| 519 | int (*ddp_target)(struct fc_lport *, u16, struct scatterlist *, |
| 520 | unsigned int); |
| 521 | /* |
Yi Zou | b84056b | 2009-11-20 14:55:19 -0800 | [diff] [blame] | 522 | * Allow LLD to fill its own Link Error Status Block |
| 523 | * |
| 524 | * STATUS: OPTIONAL |
| 525 | */ |
| 526 | void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb); |
| 527 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 528 | * Send a frame using an existing sequence and exchange. |
| 529 | * |
| 530 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 531 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 532 | int (*seq_send)(struct fc_lport *, struct fc_seq *, |
| 533 | struct fc_frame *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 534 | |
| 535 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 536 | * Send an ELS response using information from the received frame. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 537 | * |
| 538 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 539 | */ |
Joe Eykholt | 9226115 | 2010-07-20 15:21:12 -0700 | [diff] [blame] | 540 | void (*seq_els_rsp_send)(struct fc_frame *, enum fc_els_cmd, |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 541 | struct fc_seq_els_data *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 542 | |
| 543 | /* |
| 544 | * Abort an exchange and sequence. Generally called because of a |
| 545 | * exchange timeout or an abort from the upper layer. |
| 546 | * |
| 547 | * A timer_msec can be specified for abort timeout, if non-zero |
| 548 | * timer_msec value is specified then exchange resp handler |
| 549 | * will be called with timeout error if no response to abort. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 550 | * |
| 551 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 552 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 553 | int (*seq_exch_abort)(const struct fc_seq *, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 554 | unsigned int timer_msec); |
| 555 | |
| 556 | /* |
| 557 | * Indicate that an exchange/sequence tuple is complete and the memory |
| 558 | * allocated for the related objects may be freed. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 559 | * |
| 560 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 561 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 562 | void (*exch_done)(struct fc_seq *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 563 | |
| 564 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 565 | * Start a new sequence on the same exchange/sequence tuple. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 566 | * |
| 567 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 568 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 569 | struct fc_seq *(*seq_start_next)(struct fc_seq *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 570 | |
| 571 | /* |
Joe Eykholt | 1a5c2d7 | 2011-01-28 16:04:08 -0800 | [diff] [blame] | 572 | * Set a response handler for the exchange of the sequence. |
| 573 | * |
| 574 | * STATUS: OPTIONAL |
| 575 | */ |
| 576 | void (*seq_set_resp)(struct fc_seq *sp, |
| 577 | void (*resp)(struct fc_seq *, struct fc_frame *, |
| 578 | void *), |
| 579 | void *arg); |
| 580 | |
| 581 | /* |
Joe Eykholt | 239e810 | 2010-07-20 15:21:07 -0700 | [diff] [blame] | 582 | * Assign a sequence for an incoming request frame. |
| 583 | * |
| 584 | * STATUS: OPTIONAL |
| 585 | */ |
| 586 | struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *); |
| 587 | |
| 588 | /* |
Joe Eykholt | 62bdb64 | 2011-01-28 16:04:34 -0800 | [diff] [blame] | 589 | * Release the reference on the sequence returned by seq_assign(). |
| 590 | * |
| 591 | * STATUS: OPTIONAL |
| 592 | */ |
| 593 | void (*seq_release)(struct fc_seq *); |
| 594 | |
| 595 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 596 | * Reset an exchange manager, completing all sequences and exchanges. |
| 597 | * If s_id is non-zero, reset only exchanges originating from that FID. |
| 598 | * 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] | 599 | * |
| 600 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 601 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 602 | void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 603 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 604 | /* |
| 605 | * Flush the rport work queue. Generally used before shutdown. |
| 606 | * |
| 607 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 608 | */ |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 609 | void (*rport_flush_queue)(void); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 610 | |
| 611 | /* |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 612 | * Receive a frame for a local port. |
| 613 | * |
| 614 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 615 | */ |
Joe Eykholt | 9226115 | 2010-07-20 15:21:12 -0700 | [diff] [blame] | 616 | void (*lport_recv)(struct fc_lport *, struct fc_frame *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 617 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 618 | /* |
| 619 | * Reset the local port. |
| 620 | * |
| 621 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 622 | */ |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 623 | int (*lport_reset)(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 624 | |
| 625 | /* |
Joe Eykholt | 093bb6a | 2009-11-03 11:49:05 -0800 | [diff] [blame] | 626 | * Set the local port FC_ID. |
| 627 | * |
| 628 | * This may be provided by the LLD to allow it to be |
| 629 | * notified when the local port is assigned a FC-ID. |
| 630 | * |
| 631 | * The frame, if non-NULL, is the incoming frame with the |
| 632 | * FLOGI LS_ACC or FLOGI, and may contain the granted MAC |
| 633 | * address for the LLD. The frame pointer may be NULL if |
| 634 | * no MAC is associated with this assignment (LOGO or PLOGI). |
| 635 | * |
| 636 | * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid. |
| 637 | * |
| 638 | * Note: this is called with the local port mutex held. |
| 639 | * |
| 640 | * STATUS: OPTIONAL |
| 641 | */ |
| 642 | void (*lport_set_port_id)(struct fc_lport *, u32 port_id, |
| 643 | struct fc_frame *); |
| 644 | |
| 645 | /* |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 646 | * Create a remote port with a given port ID |
| 647 | * |
| 648 | * STATUS: OPTIONAL |
Robert Love | 5101ff9 | 2009-02-27 10:55:18 -0800 | [diff] [blame] | 649 | */ |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 650 | struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32); |
Robert Love | 5101ff9 | 2009-02-27 10:55:18 -0800 | [diff] [blame] | 651 | |
| 652 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 653 | * Initiates the RP state machine. It is called from the LP module. |
| 654 | * This function will issue the following commands to the N_Port |
| 655 | * identified by the FC ID provided. |
| 656 | * |
| 657 | * - PLOGI |
| 658 | * - PRLI |
| 659 | * - RTV |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 660 | * |
| 661 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 662 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 663 | int (*rport_login)(struct fc_rport_priv *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 664 | |
| 665 | /* |
| 666 | * Logoff, and remove the rport from the transport if |
| 667 | * it had been added. This will send a LOGO to the target. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 668 | * |
| 669 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 670 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 671 | int (*rport_logoff)(struct fc_rport_priv *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 672 | |
| 673 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 674 | * Receive a request from a remote port. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 675 | * |
| 676 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 677 | */ |
Joe Eykholt | 9226115 | 2010-07-20 15:21:12 -0700 | [diff] [blame] | 678 | void (*rport_recv_req)(struct fc_lport *, struct fc_frame *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 679 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 680 | /* |
| 681 | * lookup an rport by it's port ID. |
| 682 | * |
| 683 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 684 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 685 | struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 686 | |
| 687 | /* |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 688 | * Destroy an rport after final kref_put(). |
| 689 | * The argument is a pointer to the kref inside the fc_rport_priv. |
| 690 | */ |
| 691 | void (*rport_destroy)(struct kref *); |
| 692 | |
| 693 | /* |
Bhanu Prakash Gollapudi | 75a2792 | 2011-01-28 16:05:27 -0800 | [diff] [blame] | 694 | * Callback routine after the remote port is logged in |
| 695 | * |
| 696 | * STATUS: OPTIONAL |
| 697 | */ |
| 698 | void (*rport_event_callback)(struct fc_lport *, |
| 699 | struct fc_rport_priv *, |
| 700 | enum fc_rport_event); |
| 701 | |
| 702 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 703 | * Send a fcp cmd from fsp pkt. |
| 704 | * Called with the SCSI host lock unlocked and irqs disabled. |
| 705 | * |
| 706 | * The resp handler is called when FCP_RSP received. |
| 707 | * |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 708 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 709 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 710 | int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *, |
| 711 | void (*resp)(struct fc_seq *, struct fc_frame *, |
| 712 | void *)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 713 | |
| 714 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 715 | * Cleanup the FCP layer, used during link down and reset |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 716 | * |
| 717 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 718 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 719 | void (*fcp_cleanup)(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 720 | |
| 721 | /* |
| 722 | * Abort all I/O on a local port |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 723 | * |
| 724 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 725 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 726 | void (*fcp_abort_io)(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 727 | |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 728 | /* |
| 729 | * Receive a request for the discovery layer. |
| 730 | * |
| 731 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 732 | */ |
Joe Eykholt | 9226115 | 2010-07-20 15:21:12 -0700 | [diff] [blame] | 733 | void (*disc_recv_req)(struct fc_lport *, struct fc_frame *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 734 | |
| 735 | /* |
| 736 | * Start discovery for a local port. |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 737 | * |
| 738 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 739 | */ |
| 740 | void (*disc_start)(void (*disc_callback)(struct fc_lport *, |
| 741 | enum fc_disc_event), |
| 742 | struct fc_lport *); |
| 743 | |
| 744 | /* |
| 745 | * Stop discovery for a given lport. This will remove |
| 746 | * all discovered rports |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 747 | * |
| 748 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 749 | */ |
| 750 | void (*disc_stop) (struct fc_lport *); |
| 751 | |
| 752 | /* |
| 753 | * Stop discovery for a given lport. This will block |
| 754 | * until all discovered rports are deleted from the |
| 755 | * FC transport class |
Robert Love | 0ae4d4a | 2009-02-27 10:55:39 -0800 | [diff] [blame] | 756 | * |
| 757 | * STATUS: OPTIONAL |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 758 | */ |
| 759 | void (*disc_stop_final) (struct fc_lport *); |
| 760 | }; |
| 761 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 762 | /** |
| 763 | * struct fc_disc - Discovery context |
| 764 | * @retry_count: Number of retries |
| 765 | * @pending: 1 if discovery is pending, 0 if not |
Bhanu Prakash Gollapudi | c531b9b | 2010-10-08 17:12:36 -0700 | [diff] [blame] | 766 | * @requested: 1 if discovery has been requested, 0 if not |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 767 | * @seq_count: Number of sequences used for discovery |
| 768 | * @buf_len: Length of the discovery buffer |
| 769 | * @disc_id: Discovery ID |
| 770 | * @rports: List of discovered remote ports |
Joe Eykholt | 0685230 | 2010-07-20 15:19:53 -0700 | [diff] [blame] | 771 | * @priv: Private pointer for use by discovery code |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 772 | * @disc_mutex: Mutex that protects the discovery context |
| 773 | * @partial_buf: Partial name buffer (if names are returned |
| 774 | * in multiple frames) |
| 775 | * @disc_work: handle for delayed work context |
| 776 | * @disc_callback: Callback routine called when discovery completes |
| 777 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 778 | struct fc_disc { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 779 | unsigned char retry_count; |
| 780 | unsigned char pending; |
| 781 | unsigned char requested; |
| 782 | unsigned short seq_count; |
| 783 | unsigned char buf_len; |
| 784 | u16 disc_id; |
| 785 | |
| 786 | struct list_head rports; |
Joe Eykholt | 0685230 | 2010-07-20 15:19:53 -0700 | [diff] [blame] | 787 | void *priv; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 788 | struct mutex disc_mutex; |
| 789 | struct fc_gpn_ft_resp partial_buf; |
| 790 | struct delayed_work disc_work; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 791 | |
| 792 | void (*disc_callback)(struct fc_lport *, |
| 793 | enum fc_disc_event); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 794 | }; |
| 795 | |
Joe Eykholt | 70d53b0 | 2011-01-28 16:04:18 -0800 | [diff] [blame] | 796 | /* |
| 797 | * Local port notifier and events. |
| 798 | */ |
| 799 | extern struct blocking_notifier_head fc_lport_notifier_head; |
| 800 | enum fc_lport_event { |
| 801 | FC_LPORT_EV_ADD, |
| 802 | FC_LPORT_EV_DEL, |
| 803 | }; |
| 804 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 805 | /** |
| 806 | * struct fc_lport - Local port |
| 807 | * @host: The SCSI host associated with a local port |
| 808 | * @ema_list: Exchange manager anchor list |
| 809 | * @dns_rdata: The directory server remote port |
| 810 | * @ptp_rdata: Point to point remote port |
| 811 | * @scsi_priv: FCP layer internal data |
| 812 | * @disc: Discovery context |
| 813 | * @vports: Child vports if N_Port |
| 814 | * @vport: Parent vport if VN_Port |
| 815 | * @tt: Libfc function template |
| 816 | * @link_up: Link state (1 = link up, 0 = link down) |
| 817 | * @qfull: Queue state (1 queue is full, 0 queue is not full) |
| 818 | * @state: Identifies the state |
| 819 | * @boot_time: Timestamp indicating when the local port came online |
| 820 | * @host_stats: SCSI host statistics |
| 821 | * @dev_stats: FCoE device stats (TODO: libfc should not be |
| 822 | * FCoE aware) |
| 823 | * @retry_count: Number of retries in the current state |
Robert Love | 7b2787e | 2010-05-07 15:18:41 -0700 | [diff] [blame] | 824 | * @port_id: FC Port ID |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 825 | * @wwpn: World Wide Port Name |
| 826 | * @wwnn: World Wide Node Name |
| 827 | * @service_params: Common service parameters |
| 828 | * @e_d_tov: Error detection timeout value |
| 829 | * @r_a_tov: Resouce allocation timeout value |
| 830 | * @rnid_gen: RNID information |
| 831 | * @sg_supp: Indicates if scatter gather is supported |
| 832 | * @seq_offload: Indicates if sequence offload is supported |
| 833 | * @crc_offload: Indicates if CRC offload is supported |
| 834 | * @lro_enabled: Indicates if large receive offload is supported |
| 835 | * @does_npiv: Supports multiple vports |
| 836 | * @npiv_enabled: Switch/fabric allows NPIV |
| 837 | * @mfs: The maximum Fibre Channel payload size |
| 838 | * @max_retry_count: The maximum retry attempts |
| 839 | * @max_rport_retry_count: The maximum remote port retry attempts |
Joe Eykholt | f90377a | 2010-07-20 15:19:42 -0700 | [diff] [blame] | 840 | * @rport_priv_size: Size needed by driver after struct fc_rport_priv |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 841 | * @lro_xid: The maximum XID for LRO |
| 842 | * @lso_max: The maximum large offload send size |
| 843 | * @fcts: FC-4 type mask |
| 844 | * @lp_mutex: Mutex to protect the local port |
Joe Eykholt | 70d53b0 | 2011-01-28 16:04:18 -0800 | [diff] [blame] | 845 | * @list: Linkage on list of vport peers |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 846 | * @retry_work: Handle to local port for delayed retry context |
Joe Eykholt | baf9fdf | 2011-01-28 16:04:13 -0800 | [diff] [blame] | 847 | * @prov: Pointers available for use by passive FC-4 providers |
Joe Eykholt | 70d53b0 | 2011-01-28 16:04:18 -0800 | [diff] [blame] | 848 | * @lport_list: Linkage on module-wide list of local ports |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 849 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 850 | struct fc_lport { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 851 | /* Associations */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 852 | struct Scsi_Host *host; |
| 853 | struct list_head ema_list; |
| 854 | struct fc_rport_priv *dns_rdata; |
| 855 | struct fc_rport_priv *ptp_rdata; |
| 856 | void *scsi_priv; |
| 857 | struct fc_disc disc; |
| 858 | |
| 859 | /* Virtual port information */ |
| 860 | struct list_head vports; |
| 861 | struct fc_vport *vport; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 862 | |
| 863 | /* Operational Information */ |
| 864 | struct libfc_function_template tt; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 865 | u8 link_up; |
| 866 | u8 qfull; |
| 867 | enum fc_lport_state state; |
| 868 | unsigned long boot_time; |
| 869 | struct fc_host_statistics host_stats; |
| 870 | struct fcoe_dev_stats *dev_stats; |
| 871 | u8 retry_count; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 872 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 873 | /* Fabric information */ |
Robert Love | 7b2787e | 2010-05-07 15:18:41 -0700 | [diff] [blame] | 874 | u32 port_id; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 875 | u64 wwpn; |
| 876 | u64 wwnn; |
| 877 | unsigned int service_params; |
| 878 | unsigned int e_d_tov; |
| 879 | unsigned int r_a_tov; |
| 880 | struct fc_els_rnid_gen rnid_gen; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 881 | |
| 882 | /* Capabilities */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 883 | u32 sg_supp:1; |
| 884 | u32 seq_offload:1; |
| 885 | u32 crc_offload:1; |
| 886 | u32 lro_enabled:1; |
| 887 | u32 does_npiv:1; |
| 888 | u32 npiv_enabled:1; |
Joe Eykholt | 3726f35 | 2010-07-20 15:20:03 -0700 | [diff] [blame] | 889 | u32 point_to_multipoint:1; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 890 | u32 mfs; |
| 891 | u8 max_retry_count; |
| 892 | u8 max_rport_retry_count; |
Joe Eykholt | f90377a | 2010-07-20 15:19:42 -0700 | [diff] [blame] | 893 | u16 rport_priv_size; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 894 | u16 link_speed; |
| 895 | u16 link_supported_speeds; |
| 896 | u16 lro_xid; |
| 897 | unsigned int lso_max; |
| 898 | struct fc_ns_fts fcts; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 899 | |
| 900 | /* Miscellaneous */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 901 | struct mutex lp_mutex; |
| 902 | struct list_head list; |
| 903 | struct delayed_work retry_work; |
Joe Eykholt | baf9fdf | 2011-01-28 16:04:13 -0800 | [diff] [blame] | 904 | void *prov[FC_FC4_PROV_SIZE]; |
Joe Eykholt | 70d53b0 | 2011-01-28 16:04:18 -0800 | [diff] [blame] | 905 | struct list_head lport_list; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 906 | }; |
| 907 | |
Joe Eykholt | 96ad846 | 2011-01-28 16:04:02 -0800 | [diff] [blame] | 908 | /** |
| 909 | * struct fc4_prov - FC-4 provider registration |
| 910 | * @prli: Handler for incoming PRLI |
| 911 | * @prlo: Handler for session reset |
| 912 | * @recv: Handler for incoming request |
| 913 | * @module: Pointer to module. May be NULL. |
| 914 | */ |
| 915 | struct fc4_prov { |
| 916 | int (*prli)(struct fc_rport_priv *, u32 spp_len, |
| 917 | const struct fc_els_spp *spp_in, |
| 918 | struct fc_els_spp *spp_out); |
| 919 | void (*prlo)(struct fc_rport_priv *); |
| 920 | void (*recv)(struct fc_lport *, struct fc_frame *); |
| 921 | struct module *module; |
| 922 | }; |
| 923 | |
| 924 | /* |
| 925 | * Register FC-4 provider with libfc. |
| 926 | */ |
| 927 | int fc_fc4_register_provider(enum fc_fh_type type, struct fc4_prov *); |
| 928 | void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *); |
| 929 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 930 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 931 | * FC_LPORT HELPER FUNCTIONS |
| 932 | *****************************/ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 933 | |
| 934 | /** |
| 935 | * fc_lport_test_ready() - Determine if a local port is in the READY state |
| 936 | * @lport: The local port to test |
| 937 | */ |
| 938 | static inline int fc_lport_test_ready(struct fc_lport *lport) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 939 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 940 | return lport->state == LPORT_ST_READY; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 941 | } |
| 942 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 943 | /** |
| 944 | * fc_set_wwnn() - Set the World Wide Node Name of a local port |
| 945 | * @lport: The local port whose WWNN is to be set |
| 946 | * @wwnn: The new WWNN |
| 947 | */ |
| 948 | static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 949 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 950 | lport->wwnn = wwnn; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 951 | } |
| 952 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 953 | /** |
| 954 | * fc_set_wwpn() - Set the World Wide Port Name of a local port |
| 955 | * @lport: The local port whose WWPN is to be set |
| 956 | * @wwnn: The new WWPN |
| 957 | */ |
| 958 | static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 959 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 960 | lport->wwpn = wwnn; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 961 | } |
| 962 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 963 | /** |
| 964 | * fc_lport_state_enter() - Change a local port's state |
| 965 | * @lport: The local port whose state is to change |
| 966 | * @state: The new state |
| 967 | */ |
| 968 | static inline void fc_lport_state_enter(struct fc_lport *lport, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 969 | enum fc_lport_state state) |
| 970 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 971 | if (state != lport->state) |
| 972 | lport->retry_count = 0; |
| 973 | lport->state = state; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 974 | } |
| 975 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 976 | /** |
| 977 | * fc_lport_init_stats() - Allocate per-CPU statistics for a local port |
| 978 | * @lport: The local port whose statistics are to be initialized |
| 979 | */ |
| 980 | static inline int fc_lport_init_stats(struct fc_lport *lport) |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 981 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 982 | lport->dev_stats = alloc_percpu(struct fcoe_dev_stats); |
| 983 | if (!lport->dev_stats) |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 984 | return -ENOMEM; |
| 985 | return 0; |
| 986 | } |
| 987 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 988 | /** |
| 989 | * fc_lport_free_stats() - Free memory for a local port's statistics |
| 990 | * @lport: The local port whose statistics are to be freed |
| 991 | */ |
| 992 | static inline void fc_lport_free_stats(struct fc_lport *lport) |
Robert Love | 582b45b | 2009-03-31 15:51:50 -0700 | [diff] [blame] | 993 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 994 | free_percpu(lport->dev_stats); |
Vasu Dev | a0a25da | 2009-03-17 11:42:29 -0700 | [diff] [blame] | 995 | } |
| 996 | |
| 997 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 998 | * lport_priv() - Return the private data from a local port |
| 999 | * @lport: The local port whose private data is to be retreived |
| 1000 | */ |
| 1001 | static inline void *lport_priv(const struct fc_lport *lport) |
| 1002 | { |
| 1003 | return (void *)(lport + 1); |
| 1004 | } |
| 1005 | |
| 1006 | /** |
| 1007 | * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and |
| 1008 | * LLD private data |
| 1009 | * @sht: The SCSI host template |
| 1010 | * @priv_size: Size of private data |
Vasu Dev | a0a25da | 2009-03-17 11:42:29 -0700 | [diff] [blame] | 1011 | * |
Chris Leech | 8622196 | 2009-11-03 11:46:08 -0800 | [diff] [blame] | 1012 | * Returns: libfc lport |
Vasu Dev | a0a25da | 2009-03-17 11:42:29 -0700 | [diff] [blame] | 1013 | */ |
Chris Leech | 8622196 | 2009-11-03 11:46:08 -0800 | [diff] [blame] | 1014 | static inline struct fc_lport * |
Vasu Dev | a0a25da | 2009-03-17 11:42:29 -0700 | [diff] [blame] | 1015 | libfc_host_alloc(struct scsi_host_template *sht, int priv_size) |
| 1016 | { |
Chris Leech | 8622196 | 2009-11-03 11:46:08 -0800 | [diff] [blame] | 1017 | struct fc_lport *lport; |
| 1018 | struct Scsi_Host *shost; |
| 1019 | |
| 1020 | shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size); |
| 1021 | if (!shost) |
| 1022 | return NULL; |
| 1023 | lport = shost_priv(shost); |
| 1024 | lport->host = shost; |
| 1025 | INIT_LIST_HEAD(&lport->ema_list); |
Chris Leech | 174e1eb | 2009-11-03 11:46:14 -0800 | [diff] [blame] | 1026 | INIT_LIST_HEAD(&lport->vports); |
Chris Leech | 8622196 | 2009-11-03 11:46:08 -0800 | [diff] [blame] | 1027 | return lport; |
Vasu Dev | a0a25da | 2009-03-17 11:42:29 -0700 | [diff] [blame] | 1028 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1029 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1030 | /* |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1031 | * FC_FCP HELPER FUNCTIONS |
| 1032 | *****************************/ |
| 1033 | static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp) |
| 1034 | { |
| 1035 | if (fsp && fsp->cmd) |
| 1036 | return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE; |
| 1037 | return false; |
| 1038 | } |
| 1039 | |
| 1040 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1041 | * LOCAL PORT LAYER |
| 1042 | *****************************/ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1043 | int fc_lport_init(struct fc_lport *); |
| 1044 | int fc_lport_destroy(struct fc_lport *); |
| 1045 | int fc_fabric_logoff(struct fc_lport *); |
| 1046 | int fc_fabric_login(struct fc_lport *); |
Chris Leech | 8faecdd | 2009-11-03 11:46:19 -0800 | [diff] [blame] | 1047 | void __fc_linkup(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1048 | void fc_linkup(struct fc_lport *); |
Chris Leech | 8faecdd | 2009-11-03 11:46:19 -0800 | [diff] [blame] | 1049 | void __fc_linkdown(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1050 | void fc_linkdown(struct fc_lport *); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1051 | void fc_vport_setlink(struct fc_lport *); |
| 1052 | void fc_vports_linkchange(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1053 | int fc_lport_config(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1054 | int fc_lport_reset(struct fc_lport *); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1055 | int fc_set_mfs(struct fc_lport *, u32 mfs); |
| 1056 | struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize); |
| 1057 | struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id); |
| 1058 | int fc_lport_bsg_request(struct fc_bsg_job *); |
Joe Eykholt | 3726f35 | 2010-07-20 15:20:03 -0700 | [diff] [blame] | 1059 | void fc_lport_set_local_id(struct fc_lport *, u32 port_id); |
Joe Eykholt | 70d53b0 | 2011-01-28 16:04:18 -0800 | [diff] [blame] | 1060 | void fc_lport_iterate(void (*func)(struct fc_lport *, void *), void *); |
Steve Ma | a51ab39 | 2009-11-03 11:47:34 -0800 | [diff] [blame] | 1061 | |
| 1062 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1063 | * REMOTE PORT LAYER |
| 1064 | *****************************/ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1065 | int fc_rport_init(struct fc_lport *); |
| 1066 | void fc_rport_terminate_io(struct fc_rport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1067 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1068 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1069 | * DISCOVERY LAYER |
| 1070 | *****************************/ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1071 | int fc_disc_init(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1072 | |
Joe Eykholt | 0685230 | 2010-07-20 15:19:53 -0700 | [diff] [blame] | 1073 | static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc) |
| 1074 | { |
| 1075 | return container_of(disc, struct fc_lport, disc); |
| 1076 | } |
| 1077 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1078 | /* |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1079 | * FCP LAYER |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1080 | *****************************/ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1081 | int fc_fcp_init(struct fc_lport *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1082 | void fc_fcp_destroy(struct fc_lport *); |
| 1083 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1084 | /* |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1085 | * SCSI INTERACTION LAYER |
| 1086 | *****************************/ |
Jeff Garzik | f281233 | 2010-11-16 02:10:29 -0500 | [diff] [blame] | 1087 | int fc_queuecommand(struct Scsi_Host *, struct scsi_cmnd *); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1088 | int fc_eh_abort(struct scsi_cmnd *); |
| 1089 | int fc_eh_device_reset(struct scsi_cmnd *); |
| 1090 | int fc_eh_host_reset(struct scsi_cmnd *); |
| 1091 | int fc_slave_alloc(struct scsi_device *); |
| 1092 | int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason); |
| 1093 | int fc_change_queue_type(struct scsi_device *, int tag_type); |
| 1094 | |
| 1095 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1096 | * ELS/CT interface |
| 1097 | *****************************/ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1098 | int fc_elsct_init(struct fc_lport *); |
| 1099 | struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did, |
| 1100 | struct fc_frame *, |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 1101 | unsigned int op, |
| 1102 | void (*resp)(struct fc_seq *, |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1103 | struct fc_frame *, |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame] | 1104 | void *arg), |
| 1105 | void *arg, u32 timer_msec); |
| 1106 | void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *); |
| 1107 | void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *); |
Joe Eykholt | 24f089e | 2010-07-20 15:21:01 -0700 | [diff] [blame] | 1108 | void fc_fill_reply_hdr(struct fc_frame *, const struct fc_frame *, |
| 1109 | enum fc_rctl, u32 parm_offset); |
| 1110 | void fc_fill_hdr(struct fc_frame *, const struct fc_frame *, |
| 1111 | enum fc_rctl, u32 f_ctl, u16 seq_cnt, u32 parm_offset); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1112 | |
| 1113 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 1114 | /* |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1115 | * EXCHANGE MANAGER LAYER |
| 1116 | *****************************/ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1117 | int fc_exch_init(struct fc_lport *); |
| 1118 | struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *, |
| 1119 | struct fc_exch_mgr *, |
Vasu Dev | 9631609 | 2009-07-29 17:05:00 -0700 | [diff] [blame] | 1120 | bool (*match)(struct fc_frame *)); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1121 | void fc_exch_mgr_del(struct fc_exch_mgr_anchor *); |
Chris Leech | 174e1eb | 2009-11-03 11:46:14 -0800 | [diff] [blame] | 1122 | int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1123 | struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class, |
| 1124 | u16 min_xid, u16 max_xid, |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 1125 | bool (*match)(struct fc_frame *)); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1126 | void fc_exch_mgr_free(struct fc_lport *); |
| 1127 | void fc_exch_recv(struct fc_lport *, struct fc_frame *); |
Abhijeet Joglekar | 1f6ff36 | 2009-02-27 10:54:35 -0800 | [diff] [blame] | 1128 | 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] | 1129 | |
| 1130 | /* |
| 1131 | * Functions for fc_functions_template |
| 1132 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1133 | void fc_get_host_speed(struct Scsi_Host *); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1134 | void fc_get_host_port_state(struct Scsi_Host *); |
| 1135 | void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1136 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); |
| 1137 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1138 | #endif /* _LIBFC_H_ */ |