| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 1 | /******************************************************************* |
| 2 | * This file is part of the Emulex Linux Device Driver for * |
James.Smart@Emulex.Com | c44ce17 | 2005-06-25 10:34:39 -0400 | [diff] [blame] | 3 | * Fibre Channel Host Bus Adapters. * |
James Smart | e47c909 | 2008-02-08 18:49:26 -0500 | [diff] [blame] | 4 | * Copyright (C) 2004-2008 Emulex. All rights reserved. * |
James.Smart@Emulex.Com | c44ce17 | 2005-06-25 10:34:39 -0400 | [diff] [blame] | 5 | * EMULEX and SLI are trademarks of Emulex. * |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 6 | * www.emulex.com * |
| 7 | * * |
| 8 | * This program is free software; you can redistribute it and/or * |
James.Smart@Emulex.Com | c44ce17 | 2005-06-25 10:34:39 -0400 | [diff] [blame] | 9 | * modify it under the terms of version 2 of the GNU General * |
| 10 | * Public License as published by the Free Software Foundation. * |
| 11 | * This program is distributed in the hope that it will be useful. * |
| 12 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * |
| 13 | * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * |
| 14 | * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * |
| 15 | * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * |
| 16 | * TO BE LEGALLY INVALID. See the GNU General Public License for * |
| 17 | * more details, a copy of which can be found in the file COPYING * |
| 18 | * included with this package. * |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 19 | *******************************************************************/ |
| 20 | |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 21 | #define FC_MAX_HOLD_RSCN 32 /* max number of deferred RSCNs */ |
| 22 | #define FC_MAX_NS_RSP 65536 /* max size NameServer rsp */ |
| 23 | #define FC_MAXLOOP 126 /* max devices supported on a fc loop */ |
| 24 | #define LPFC_DISC_FLOGI_TMO 10 /* Discovery FLOGI ratov */ |
| 25 | |
| 26 | |
| 27 | /* This is the protocol dependent definition for a Node List Entry. |
| 28 | * This is used by Fibre Channel protocol to support FCP. |
| 29 | */ |
| 30 | |
Jamie Wellnitz | 4141586 | 2006-02-28 19:25:27 -0500 | [diff] [blame] | 31 | /* worker thread events */ |
| 32 | enum lpfc_work_type { |
Jamie Wellnitz | 4141586 | 2006-02-28 19:25:27 -0500 | [diff] [blame] | 33 | LPFC_EVT_ONLINE, |
James Smart | 46fa311 | 2007-04-25 09:51:45 -0400 | [diff] [blame] | 34 | LPFC_EVT_OFFLINE_PREP, |
Jamie Wellnitz | 4141586 | 2006-02-28 19:25:27 -0500 | [diff] [blame] | 35 | LPFC_EVT_OFFLINE, |
| 36 | LPFC_EVT_WARM_START, |
| 37 | LPFC_EVT_KILL, |
| 38 | LPFC_EVT_ELS_RETRY, |
James Smart | 92d7f7b | 2007-06-17 19:56:38 -0500 | [diff] [blame] | 39 | LPFC_EVT_DEV_LOSS, |
James Smart | ea2151b | 2008-09-07 11:52:10 -0400 | [diff] [blame] | 40 | LPFC_EVT_FASTPATH_MGMT_EVT, |
Jamie Wellnitz | 4141586 | 2006-02-28 19:25:27 -0500 | [diff] [blame] | 41 | }; |
| 42 | |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 43 | /* structure used to queue event to the discovery tasklet */ |
| 44 | struct lpfc_work_evt { |
| 45 | struct list_head evt_listp; |
James Smart | 92d7f7b | 2007-06-17 19:56:38 -0500 | [diff] [blame] | 46 | void *evt_arg1; |
| 47 | void *evt_arg2; |
Jamie Wellnitz | 4141586 | 2006-02-28 19:25:27 -0500 | [diff] [blame] | 48 | enum lpfc_work_type evt; |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 49 | }; |
| 50 | |
James Smart | ea2151b | 2008-09-07 11:52:10 -0400 | [diff] [blame] | 51 | struct lpfc_scsi_check_condition_event; |
| 52 | struct lpfc_scsi_varqueuedepth_event; |
| 53 | struct lpfc_scsi_event_header; |
| 54 | struct lpfc_fabric_event_header; |
| 55 | struct lpfc_fcprdchkerr_event; |
| 56 | |
| 57 | /* structure used for sending events from fast path */ |
| 58 | struct lpfc_fast_path_event { |
| 59 | struct lpfc_work_evt work_evt; |
| 60 | struct lpfc_vport *vport; |
| 61 | union { |
| 62 | struct lpfc_scsi_check_condition_event check_cond_evt; |
| 63 | struct lpfc_scsi_varqueuedepth_event queue_depth_evt; |
| 64 | struct lpfc_scsi_event_header scsi_evt; |
| 65 | struct lpfc_fabric_event_header fabric_evt; |
| 66 | struct lpfc_fcprdchkerr_event read_check_error; |
| 67 | } un; |
| 68 | }; |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 69 | |
| 70 | struct lpfc_nodelist { |
| 71 | struct list_head nlp_listp; |
James Smart | 2e0fef8 | 2007-06-17 19:56:36 -0500 | [diff] [blame] | 72 | struct lpfc_name nlp_portname; |
| 73 | struct lpfc_name nlp_nodename; |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 74 | uint32_t nlp_flag; /* entry flags */ |
| 75 | uint32_t nlp_DID; /* FC D_ID of entry */ |
| 76 | uint32_t nlp_last_elscmd; /* Last ELS cmd sent */ |
| 77 | uint16_t nlp_type; |
| 78 | #define NLP_FC_NODE 0x1 /* entry is an FC node */ |
| 79 | #define NLP_FABRIC 0x4 /* entry rep a Fabric entity */ |
| 80 | #define NLP_FCP_TARGET 0x8 /* entry is an FCP target */ |
| 81 | #define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */ |
| 82 | |
| 83 | uint16_t nlp_rpi; |
| 84 | uint16_t nlp_state; /* state transition indicator */ |
Jamie Wellnitz | 5024ab1 | 2006-02-28 19:25:28 -0500 | [diff] [blame] | 85 | uint16_t nlp_prev_state; /* state transition indicator */ |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 86 | uint16_t nlp_xri; /* output exchange id for RPI */ |
| 87 | uint16_t nlp_sid; /* scsi id */ |
| 88 | #define NLP_NO_SID 0xffff |
| 89 | uint16_t nlp_maxframe; /* Max RCV frame size */ |
| 90 | uint8_t nlp_class_sup; /* Supported Classes */ |
| 91 | uint8_t nlp_retry; /* used for ELS retries */ |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 92 | uint8_t nlp_fcp_info; /* class info, bits 0-3 */ |
| 93 | #define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */ |
| 94 | |
James Smart | e47c909 | 2008-02-08 18:49:26 -0500 | [diff] [blame] | 95 | uint16_t nlp_usg_map; /* ndlp management usage bitmap */ |
| 96 | #define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */ |
| 97 | #define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */ |
| 98 | #define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */ |
| 99 | #define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */ |
| 100 | |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 101 | struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 102 | struct fc_rport *rport; /* Corresponding FC transport |
| 103 | port structure */ |
James Smart | 2e0fef8 | 2007-06-17 19:56:36 -0500 | [diff] [blame] | 104 | struct lpfc_vport *vport; |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 105 | struct lpfc_work_evt els_retry_evt; |
James Smart | 92d7f7b | 2007-06-17 19:56:38 -0500 | [diff] [blame] | 106 | struct lpfc_work_evt dev_loss_evt; |
James.Smart@Emulex.Com | 445cf4f | 2005-11-28 11:42:38 -0500 | [diff] [blame] | 107 | unsigned long last_ramp_up_time; /* jiffy of last ramp up */ |
| 108 | unsigned long last_q_full_time; /* jiffy of last queue full */ |
James Smart | 329f9bc | 2007-04-25 09:53:01 -0400 | [diff] [blame] | 109 | struct kref kref; |
James Smart | 977b5a0 | 2008-09-07 11:52:04 -0400 | [diff] [blame] | 110 | atomic_t cmd_pending; |
| 111 | uint32_t cmd_qdepth; |
| 112 | unsigned long last_change_time; |
James Smart | ea2151b | 2008-09-07 11:52:10 -0400 | [diff] [blame] | 113 | struct lpfc_scsicmd_bkt *lat_data; /* Latency data */ |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 114 | }; |
| 115 | |
| 116 | /* Defines for nlp_flag (uint32) */ |
James Smart | 7f5f3d0 | 2008-02-08 18:50:14 -0500 | [diff] [blame] | 117 | #define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */ |
| 118 | #define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */ |
| 119 | #define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */ |
| 120 | #define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */ |
| 121 | #define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */ |
| 122 | #define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */ |
| 123 | #define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */ |
| 124 | #define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */ |
| 125 | #define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */ |
| 126 | #define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */ |
| 127 | #define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */ |
| 128 | #define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */ |
| 129 | #define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 130 | ACC */ |
James Smart | 7f5f3d0 | 2008-02-08 18:50:14 -0500 | [diff] [blame] | 131 | #define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 132 | NPR list */ |
James Smart | 7f5f3d0 | 2008-02-08 18:50:14 -0500 | [diff] [blame] | 133 | #define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */ |
| 134 | #define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */ |
James Smart | 92d7f7b | 2007-06-17 19:56:38 -0500 | [diff] [blame] | 135 | #define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */ |
James Smart | 7f5f3d0 | 2008-02-08 18:50:14 -0500 | [diff] [blame] | 136 | #define NLP_SC_REQ 0x20000000 /* Target requires authentication */ |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 137 | |
James Smart | e47c909 | 2008-02-08 18:49:26 -0500 | [diff] [blame] | 138 | /* ndlp usage management macros */ |
| 139 | #define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \ |
| 140 | & NLP_USG_NODE_ACT_BIT) \ |
| 141 | && \ |
| 142 | !((ndlp)->nlp_usg_map \ |
| 143 | & NLP_USG_FREE_ACK_BIT)) |
| 144 | #define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ |
| 145 | |= NLP_USG_NODE_ACT_BIT) |
| 146 | #define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ |
| 147 | = NLP_USG_NODE_ACT_BIT) |
| 148 | #define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ |
| 149 | &= ~NLP_USG_NODE_ACT_BIT) |
| 150 | #define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ |
| 151 | & NLP_USG_IACT_REQ_BIT) |
| 152 | #define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ |
| 153 | |= NLP_USG_IACT_REQ_BIT) |
| 154 | #define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ |
| 155 | & NLP_USG_FREE_REQ_BIT) |
| 156 | #define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ |
| 157 | |= NLP_USG_FREE_REQ_BIT) |
| 158 | #define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ |
| 159 | & NLP_USG_FREE_ACK_BIT) |
| 160 | #define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ |
| 161 | |= NLP_USG_FREE_ACK_BIT) |
| 162 | |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 163 | /* There are 4 different double linked lists nodelist entries can reside on. |
| 164 | * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used |
| 165 | * when Link Up discovery or Registered State Change Notification (RSCN) |
| 166 | * processing is needed. Each list holds the nodes that require a PLOGI or |
| 167 | * ADISC Extended Link Service (ELS) request. These lists keep track of the |
| 168 | * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected |
| 169 | * by Link Up) event. The unmapped_list contains all nodes that have |
| 170 | * successfully logged into at the Fibre Channel level. The |
| 171 | * mapped_list will contain all nodes that are mapped FCP targets. |
| 172 | * |
| 173 | * The bind list is a list of undiscovered (potentially non-existent) nodes |
| 174 | * that we have saved binding information on. This information is used when |
| 175 | * nodes transition from the unmapped to the mapped list. |
| 176 | */ |
| 177 | |
| 178 | /* Defines for nlp_state */ |
| 179 | #define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */ |
| 180 | #define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */ |
| 181 | #define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */ |
| 182 | #define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */ |
| 183 | #define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */ |
| 184 | #define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */ |
| 185 | #define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */ |
| 186 | #define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */ |
| 187 | #define NLP_STE_MAX_STATE 0x8 |
| 188 | #define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */ |
| 189 | |
| 190 | /* For UNUSED_NODE state, the node has just been allocated. |
| 191 | * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on |
| 192 | * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list |
| 193 | * and put on the unmapped list. For ADISC processing, the node is taken off |
| 194 | * the ADISC list and placed on either the mapped or unmapped list (depending |
| 195 | * on its previous state). Once on the unmapped list, a PRLI is issued and the |
| 196 | * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is |
| 197 | * changed to PRLI_COMPL. If the completion indicates a mapped |
| 198 | * node, the node is taken off the unmapped list. The binding list is checked |
| 199 | * for a valid binding, or a binding is automatically assigned. If binding |
| 200 | * assignment is unsuccessful, the node is left on the unmapped list. If |
| 201 | * binding assignment is successful, the associated binding list entry (if |
| 202 | * any) is removed, and the node is placed on the mapped list. |
| 203 | */ |
| 204 | /* |
| 205 | * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped |
James Smart | c01f320 | 2006-08-18 17:47:08 -0400 | [diff] [blame] | 206 | * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 207 | * expire, all effected nodes will receive a DEVICE_RM event. |
| 208 | */ |
| 209 | /* |
| 210 | * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists |
| 211 | * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap |
| 212 | * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to / |
| 213 | * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated, |
| 214 | * we will first process the ADISC list. 32 entries are processed initially and |
| 215 | * ADISC is initited for each one. Completions / Events for each node are |
| 216 | * funnelled thru the state machine. As each node finishes ADISC processing, it |
| 217 | * starts ADISC for any nodes waiting for ADISC processing. If no nodes are |
| 218 | * waiting, and the ADISC list count is identically 0, then we are done. For |
| 219 | * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we |
| 220 | * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI |
| 221 | * list. 32 entries are processed initially and PLOGI is initited for each one. |
| 222 | * Completions / Events for each node are funnelled thru the state machine. As |
| 223 | * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting |
| 224 | * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is |
| 225 | * identically 0, then we are done. We have now completed discovery / RSCN |
| 226 | * handling. Upon completion, ALL nodes should be on either the mapped or |
| 227 | * unmapped lists. |
| 228 | */ |
| 229 | |
| 230 | /* Defines for Node List Entry Events that could happen */ |
| 231 | #define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */ |
| 232 | #define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */ |
| 233 | #define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */ |
| 234 | #define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */ |
| 235 | #define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */ |
| 236 | #define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */ |
| 237 | #define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */ |
| 238 | #define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */ |
| 239 | #define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */ |
| 240 | #define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */ |
| 241 | #define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */ |
| 242 | #define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */ |
| 243 | #define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */ |
| 244 | #define NLP_EVT_MAX_EVENT 0xd |
| 245 | |