1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2017-2020 Broadcom. All Rights Reserved. The term * 5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. * 6 * Copyright (C) 2004-2013 Emulex. All rights reserved. * 7 * EMULEX and SLI are trademarks of Emulex. * 8 * www.broadcom.com * 9 * * 10 * This program is free software; you can redistribute it and/or * 11 * modify it under the terms of version 2 of the GNU General * 12 * Public License as published by the Free Software Foundation. * 13 * This program is distributed in the hope that it will be useful. * 14 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * 15 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * 16 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * 17 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * 18 * TO BE LEGALLY INVALID. See the GNU General Public License for * 19 * more details, a copy of which can be found in the file COPYING * 20 * included with this package. * 21 *******************************************************************/ 22 23 #define FC_MAX_HOLD_RSCN 32 /* max number of deferred RSCNs */ 24 #define FC_MAX_NS_RSP 64512 /* max size NameServer rsp */ 25 #define FC_MAXLOOP 126 /* max devices supported on a fc loop */ 26 #define LPFC_DISC_FLOGI_TMO 10 /* Discovery FLOGI ratov */ 27 28 29 /* This is the protocol dependent definition for a Node List Entry. 30 * This is used by Fibre Channel protocol to support FCP. 31 */ 32 33 /* worker thread events */ 34 enum lpfc_work_type { 35 LPFC_EVT_ONLINE, 36 LPFC_EVT_OFFLINE_PREP, 37 LPFC_EVT_OFFLINE, 38 LPFC_EVT_WARM_START, 39 LPFC_EVT_KILL, 40 LPFC_EVT_ELS_RETRY, 41 LPFC_EVT_DEV_LOSS, 42 LPFC_EVT_FASTPATH_MGMT_EVT, 43 LPFC_EVT_RESET_HBA, 44 LPFC_EVT_RECOVER_PORT 45 }; 46 47 /* structure used to queue event to the discovery tasklet */ 48 struct lpfc_work_evt { 49 struct list_head evt_listp; 50 void *evt_arg1; 51 void *evt_arg2; 52 enum lpfc_work_type evt; 53 }; 54 55 struct lpfc_scsi_check_condition_event; 56 struct lpfc_scsi_varqueuedepth_event; 57 struct lpfc_scsi_event_header; 58 struct lpfc_fabric_event_header; 59 struct lpfc_fcprdchkerr_event; 60 61 /* structure used for sending events from fast path */ 62 struct lpfc_fast_path_event { 63 struct lpfc_work_evt work_evt; 64 struct lpfc_vport *vport; 65 union { 66 struct lpfc_scsi_check_condition_event check_cond_evt; 67 struct lpfc_scsi_varqueuedepth_event queue_depth_evt; 68 struct lpfc_scsi_event_header scsi_evt; 69 struct lpfc_fabric_event_header fabric_evt; 70 struct lpfc_fcprdchkerr_event read_check_error; 71 } un; 72 }; 73 74 #define LPFC_SLI4_MAX_XRI 1024 /* Used to make the ndlp's xri_bitmap */ 75 #define XRI_BITMAP_ULONGS (LPFC_SLI4_MAX_XRI / BITS_PER_LONG) 76 struct lpfc_node_rrqs { 77 unsigned long xri_bitmap[XRI_BITMAP_ULONGS]; 78 }; 79 80 struct lpfc_nodelist { 81 struct list_head nlp_listp; 82 struct lpfc_name nlp_portname; 83 struct lpfc_name nlp_nodename; 84 85 spinlock_t lock; /* Node management lock */ 86 87 uint32_t nlp_flag; /* entry flags */ 88 uint32_t nlp_DID; /* FC D_ID of entry */ 89 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */ 90 uint16_t nlp_type; 91 #define NLP_FC_NODE 0x1 /* entry is an FC node */ 92 #define NLP_FABRIC 0x4 /* entry rep a Fabric entity */ 93 #define NLP_FCP_TARGET 0x8 /* entry is an FCP target */ 94 #define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */ 95 #define NLP_NVME_TARGET 0x20 /* entry is a NVME Target */ 96 #define NLP_NVME_INITIATOR 0x40 /* entry is a NVME Initiator */ 97 #define NLP_NVME_DISCOVERY 0x80 /* entry has NVME disc srvc */ 98 99 uint16_t nlp_fc4_type; /* FC types node supports. */ 100 /* Assigned from GID_FF, only 101 * FCP (0x8) and NVME (0x28) 102 * supported. 103 */ 104 #define NLP_FC4_NONE 0x0 105 #define NLP_FC4_FCP 0x1 /* FC4 Type FCP (value x8)) */ 106 #define NLP_FC4_NVME 0x2 /* FC4 TYPE NVME (value x28) */ 107 108 uint16_t nlp_rpi; 109 uint16_t nlp_state; /* state transition indicator */ 110 uint16_t nlp_prev_state; /* state transition indicator */ 111 uint16_t nlp_xri; /* output exchange id for RPI */ 112 uint16_t nlp_sid; /* scsi id */ 113 #define NLP_NO_SID 0xffff 114 uint16_t nlp_maxframe; /* Max RCV frame size */ 115 uint8_t nlp_class_sup; /* Supported Classes */ 116 uint8_t nlp_retry; /* used for ELS retries */ 117 uint8_t nlp_fcp_info; /* class info, bits 0-3 */ 118 #define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */ 119 u8 nlp_nvme_info; /* NVME NSLER Support */ 120 #define NLP_NVME_NSLER 0x1 /* NVME NSLER device */ 121 122 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ 123 struct lpfc_hba *phba; 124 struct fc_rport *rport; /* scsi_transport_fc port structure */ 125 struct lpfc_nvme_rport *nrport; /* nvme transport rport struct. */ 126 struct lpfc_vport *vport; 127 struct lpfc_work_evt els_retry_evt; 128 struct lpfc_work_evt dev_loss_evt; 129 struct lpfc_work_evt recovery_evt; 130 struct kref kref; 131 atomic_t cmd_pending; 132 uint32_t cmd_qdepth; 133 unsigned long last_change_time; 134 unsigned long *active_rrqs_xri_bitmap; 135 struct lpfc_scsicmd_bkt *lat_data; /* Latency data */ 136 uint32_t fc4_prli_sent; 137 uint32_t fc4_xpt_flags; 138 #define NLP_WAIT_FOR_UNREG 0x1 139 #define SCSI_XPT_REGD 0x2 140 #define NVME_XPT_REGD 0x4 141 142 143 uint32_t nvme_fb_size; /* NVME target's supported byte cnt */ 144 #define NVME_FB_BIT_SHIFT 9 /* PRLI Rsp first burst in 512B units. */ 145 uint32_t nlp_defer_did; 146 }; 147 148 struct lpfc_node_rrq { 149 struct list_head list; 150 uint16_t xritag; 151 uint16_t send_rrq; 152 uint16_t rxid; 153 uint32_t nlp_DID; /* FC D_ID of entry */ 154 struct lpfc_vport *vport; 155 struct lpfc_nodelist *ndlp; 156 unsigned long rrq_stop_time; 157 }; 158 159 #define lpfc_ndlp_check_qdepth(phba, ndlp) \ 160 (ndlp->cmd_qdepth < phba->sli4_hba.max_cfg_param.max_xri) 161 162 /* Defines for nlp_flag (uint32) */ 163 #define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */ 164 #define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */ 165 #define NLP_RELEASE_RPI 0x00000004 /* Release RPI to free pool */ 166 #define NLP_SUPPRESS_RSP 0x00000010 /* Remote NPort supports suppress rsp */ 167 #define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */ 168 #define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */ 169 #define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */ 170 #define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */ 171 #define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */ 172 #define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */ 173 #define NLP_NVMET_RECOV 0x00001000 /* NVMET auditing node for recovery. */ 174 #define NLP_FCP_PRLI_RJT 0x00002000 /* Rport does not support FCP PRLI. */ 175 #define NLP_UNREG_INP 0x00008000 /* UNREG_RPI cmd is in progress */ 176 #define NLP_DROPPED 0x00010000 /* Init ref count has been dropped */ 177 #define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */ 178 #define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */ 179 #define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */ 180 #define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */ 181 #define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */ 182 #define NLP_ISSUE_LOGO 0x00400000 /* waiting to issue a LOGO */ 183 #define NLP_IN_DEV_LOSS 0x00800000 /* devloss in progress */ 184 #define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful 185 ACC */ 186 #define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from 187 NPR list */ 188 #define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */ 189 #define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */ 190 #define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */ 191 #define NLP_SC_REQ 0x20000000 /* Target requires authentication */ 192 #define NLP_FIRSTBURST 0x40000000 /* Target supports FirstBurst */ 193 #define NLP_RPI_REGISTERED 0x80000000 /* nlp_rpi is valid */ 194 195 /* There are 4 different double linked lists nodelist entries can reside on. 196 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used 197 * when Link Up discovery or Registered State Change Notification (RSCN) 198 * processing is needed. Each list holds the nodes that require a PLOGI or 199 * ADISC Extended Link Service (ELS) request. These lists keep track of the 200 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected 201 * by Link Up) event. The unmapped_list contains all nodes that have 202 * successfully logged into at the Fibre Channel level. The 203 * mapped_list will contain all nodes that are mapped FCP targets. 204 * 205 * The bind list is a list of undiscovered (potentially non-existent) nodes 206 * that we have saved binding information on. This information is used when 207 * nodes transition from the unmapped to the mapped list. 208 */ 209 210 /* Defines for nlp_state */ 211 #define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */ 212 #define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */ 213 #define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */ 214 #define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */ 215 #define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */ 216 #define NLP_STE_LOGO_ISSUE 0x5 /* LOGO was sent to NL_PORT */ 217 #define NLP_STE_UNMAPPED_NODE 0x6 /* PRLI completed from NL_PORT */ 218 #define NLP_STE_MAPPED_NODE 0x7 /* Identified as a FCP Target */ 219 #define NLP_STE_NPR_NODE 0x8 /* NPort disappeared */ 220 #define NLP_STE_MAX_STATE 0x9 221 #define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */ 222 223 /* For UNUSED_NODE state, the node has just been allocated. 224 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on 225 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list 226 * and put on the unmapped list. For ADISC processing, the node is taken off 227 * the ADISC list and placed on either the mapped or unmapped list (depending 228 * on its previous state). Once on the unmapped list, a PRLI is issued and the 229 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is 230 * changed to PRLI_COMPL. If the completion indicates a mapped 231 * node, the node is taken off the unmapped list. The binding list is checked 232 * for a valid binding, or a binding is automatically assigned. If binding 233 * assignment is unsuccessful, the node is left on the unmapped list. If 234 * binding assignment is successful, the associated binding list entry (if 235 * any) is removed, and the node is placed on the mapped list. 236 */ 237 /* 238 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped 239 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers 240 * expire, all effected nodes will receive a DEVICE_RM event. 241 */ 242 /* 243 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists 244 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap 245 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to / 246 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated, 247 * we will first process the ADISC list. 32 entries are processed initially and 248 * ADISC is initited for each one. Completions / Events for each node are 249 * funnelled thru the state machine. As each node finishes ADISC processing, it 250 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are 251 * waiting, and the ADISC list count is identically 0, then we are done. For 252 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we 253 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI 254 * list. 32 entries are processed initially and PLOGI is initited for each one. 255 * Completions / Events for each node are funnelled thru the state machine. As 256 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting 257 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is 258 * identically 0, then we are done. We have now completed discovery / RSCN 259 * handling. Upon completion, ALL nodes should be on either the mapped or 260 * unmapped lists. 261 */ 262 263 /* Defines for Node List Entry Events that could happen */ 264 #define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */ 265 #define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */ 266 #define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */ 267 #define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */ 268 #define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */ 269 #define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */ 270 #define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */ 271 #define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */ 272 #define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */ 273 #define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */ 274 #define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */ 275 #define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */ 276 #define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */ 277 #define NLP_EVT_MAX_EVENT 0xd 278 #define NLP_EVT_NOTHING_PENDING 0xff 279