1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2017-2018 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 }; 45 46 /* structure used to queue event to the discovery tasklet */ 47 struct lpfc_work_evt { 48 struct list_head evt_listp; 49 void *evt_arg1; 50 void *evt_arg2; 51 enum lpfc_work_type evt; 52 }; 53 54 struct lpfc_scsi_check_condition_event; 55 struct lpfc_scsi_varqueuedepth_event; 56 struct lpfc_scsi_event_header; 57 struct lpfc_fabric_event_header; 58 struct lpfc_fcprdchkerr_event; 59 60 /* structure used for sending events from fast path */ 61 struct lpfc_fast_path_event { 62 struct lpfc_work_evt work_evt; 63 struct lpfc_vport *vport; 64 union { 65 struct lpfc_scsi_check_condition_event check_cond_evt; 66 struct lpfc_scsi_varqueuedepth_event queue_depth_evt; 67 struct lpfc_scsi_event_header scsi_evt; 68 struct lpfc_fabric_event_header fabric_evt; 69 struct lpfc_fcprdchkerr_event read_check_error; 70 } un; 71 }; 72 73 #define LPFC_SLI4_MAX_XRI 1024 /* Used to make the ndlp's xri_bitmap */ 74 #define XRI_BITMAP_ULONGS (LPFC_SLI4_MAX_XRI / BITS_PER_LONG) 75 struct lpfc_node_rrqs { 76 unsigned long xri_bitmap[XRI_BITMAP_ULONGS]; 77 }; 78 79 struct lpfc_nodelist { 80 struct list_head nlp_listp; 81 struct lpfc_name nlp_portname; 82 struct lpfc_name nlp_nodename; 83 uint32_t nlp_flag; /* entry flags */ 84 uint32_t nlp_DID; /* FC D_ID of entry */ 85 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */ 86 uint16_t nlp_type; 87 #define NLP_FC_NODE 0x1 /* entry is an FC node */ 88 #define NLP_FABRIC 0x4 /* entry rep a Fabric entity */ 89 #define NLP_FCP_TARGET 0x8 /* entry is an FCP target */ 90 #define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */ 91 #define NLP_NVME_TARGET 0x20 /* entry is a NVME Target */ 92 #define NLP_NVME_INITIATOR 0x40 /* entry is a NVME Initiator */ 93 #define NLP_NVME_DISCOVERY 0x80 /* entry has NVME disc srvc */ 94 95 uint16_t nlp_fc4_type; /* FC types node supports. */ 96 /* Assigned from GID_FF, only 97 * FCP (0x8) and NVME (0x28) 98 * supported. 99 */ 100 #define NLP_FC4_NONE 0x0 101 #define NLP_FC4_FCP 0x1 /* FC4 Type FCP (value x8)) */ 102 #define NLP_FC4_NVME 0x2 /* FC4 TYPE NVME (value x28) */ 103 104 uint16_t nlp_rpi; 105 uint16_t nlp_state; /* state transition indicator */ 106 uint16_t nlp_prev_state; /* state transition indicator */ 107 uint16_t nlp_xri; /* output exchange id for RPI */ 108 uint16_t nlp_sid; /* scsi id */ 109 #define NLP_NO_SID 0xffff 110 uint16_t nlp_maxframe; /* Max RCV frame size */ 111 uint8_t nlp_class_sup; /* Supported Classes */ 112 uint8_t nlp_retry; /* used for ELS retries */ 113 uint8_t nlp_fcp_info; /* class info, bits 0-3 */ 114 #define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */ 115 u8 nlp_nvme_info; /* NVME NSLER Support */ 116 #define NLP_NVME_NSLER 0x1 /* NVME NSLER device */ 117 118 uint16_t nlp_usg_map; /* ndlp management usage bitmap */ 119 #define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */ 120 #define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */ 121 #define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */ 122 #define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */ 123 124 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ 125 struct lpfc_hba *phba; 126 struct fc_rport *rport; /* scsi_transport_fc port structure */ 127 struct lpfc_nvme_rport *nrport; /* nvme transport rport struct. */ 128 struct lpfc_vport *vport; 129 struct lpfc_work_evt els_retry_evt; 130 struct lpfc_work_evt dev_loss_evt; 131 struct kref kref; 132 atomic_t cmd_pending; 133 uint32_t cmd_qdepth; 134 unsigned long last_change_time; 135 unsigned long *active_rrqs_xri_bitmap; 136 struct lpfc_scsicmd_bkt *lat_data; /* Latency data */ 137 uint32_t fc4_prli_sent; 138 uint32_t upcall_flags; 139 #define NLP_WAIT_FOR_UNREG 0x1 140 141 uint32_t nvme_fb_size; /* NVME target's supported byte cnt */ 142 #define NVME_FB_BIT_SHIFT 9 /* PRLI Rsp first burst in 512B units. */ 143 uint32_t nlp_defer_did; 144 }; 145 struct lpfc_node_rrq { 146 struct list_head list; 147 uint16_t xritag; 148 uint16_t send_rrq; 149 uint16_t rxid; 150 uint32_t nlp_DID; /* FC D_ID of entry */ 151 struct lpfc_vport *vport; 152 struct lpfc_nodelist *ndlp; 153 unsigned long rrq_stop_time; 154 }; 155 156 #define lpfc_ndlp_check_qdepth(phba, ndlp) \ 157 (ndlp->cmd_qdepth < phba->sli4_hba.max_cfg_param.max_xri) 158 159 /* Defines for nlp_flag (uint32) */ 160 #define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */ 161 #define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */ 162 #define NLP_RELEASE_RPI 0x00000004 /* Release RPI to free pool */ 163 #define NLP_SUPPRESS_RSP 0x00000010 /* Remote NPort supports suppress rsp */ 164 #define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */ 165 #define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */ 166 #define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */ 167 #define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */ 168 #define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */ 169 #define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */ 170 #define NLP_NVMET_RECOV 0x00001000 /* NVMET auditing node for recovery. */ 171 #define NLP_FCP_PRLI_RJT 0x00002000 /* Rport does not support FCP PRLI. */ 172 #define NLP_UNREG_INP 0x00008000 /* UNREG_RPI cmd is in progress */ 173 #define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */ 174 #define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */ 175 #define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */ 176 #define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */ 177 #define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */ 178 #define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */ 179 #define NLP_ISSUE_LOGO 0x00400000 /* waiting to issue a LOGO */ 180 #define NLP_IN_DEV_LOSS 0x00800000 /* devloss in progress */ 181 #define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful 182 ACC */ 183 #define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from 184 NPR list */ 185 #define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */ 186 #define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */ 187 #define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */ 188 #define NLP_SC_REQ 0x20000000 /* Target requires authentication */ 189 #define NLP_FIRSTBURST 0x40000000 /* Target supports FirstBurst */ 190 #define NLP_RPI_REGISTERED 0x80000000 /* nlp_rpi is valid */ 191 192 193 /* ndlp usage management macros */ 194 #define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \ 195 & NLP_USG_NODE_ACT_BIT) \ 196 && \ 197 !((ndlp)->nlp_usg_map \ 198 & NLP_USG_FREE_ACK_BIT)) 199 #define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 200 |= NLP_USG_NODE_ACT_BIT) 201 #define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 202 = NLP_USG_NODE_ACT_BIT) 203 #define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ 204 &= ~NLP_USG_NODE_ACT_BIT) 205 #define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ 206 & NLP_USG_IACT_REQ_BIT) 207 #define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ 208 |= NLP_USG_IACT_REQ_BIT) 209 #define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ 210 & NLP_USG_FREE_REQ_BIT) 211 #define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ 212 |= NLP_USG_FREE_REQ_BIT) 213 #define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ 214 & NLP_USG_FREE_ACK_BIT) 215 #define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ 216 |= NLP_USG_FREE_ACK_BIT) 217 218 /* There are 4 different double linked lists nodelist entries can reside on. 219 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used 220 * when Link Up discovery or Registered State Change Notification (RSCN) 221 * processing is needed. Each list holds the nodes that require a PLOGI or 222 * ADISC Extended Link Service (ELS) request. These lists keep track of the 223 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected 224 * by Link Up) event. The unmapped_list contains all nodes that have 225 * successfully logged into at the Fibre Channel level. The 226 * mapped_list will contain all nodes that are mapped FCP targets. 227 * 228 * The bind list is a list of undiscovered (potentially non-existent) nodes 229 * that we have saved binding information on. This information is used when 230 * nodes transition from the unmapped to the mapped list. 231 */ 232 233 /* Defines for nlp_state */ 234 #define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */ 235 #define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */ 236 #define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */ 237 #define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */ 238 #define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */ 239 #define NLP_STE_LOGO_ISSUE 0x5 /* LOGO was sent to NL_PORT */ 240 #define NLP_STE_UNMAPPED_NODE 0x6 /* PRLI completed from NL_PORT */ 241 #define NLP_STE_MAPPED_NODE 0x7 /* Identified as a FCP Target */ 242 #define NLP_STE_NPR_NODE 0x8 /* NPort disappeared */ 243 #define NLP_STE_MAX_STATE 0x9 244 #define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */ 245 246 /* For UNUSED_NODE state, the node has just been allocated. 247 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on 248 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list 249 * and put on the unmapped list. For ADISC processing, the node is taken off 250 * the ADISC list and placed on either the mapped or unmapped list (depending 251 * on its previous state). Once on the unmapped list, a PRLI is issued and the 252 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is 253 * changed to PRLI_COMPL. If the completion indicates a mapped 254 * node, the node is taken off the unmapped list. The binding list is checked 255 * for a valid binding, or a binding is automatically assigned. If binding 256 * assignment is unsuccessful, the node is left on the unmapped list. If 257 * binding assignment is successful, the associated binding list entry (if 258 * any) is removed, and the node is placed on the mapped list. 259 */ 260 /* 261 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped 262 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers 263 * expire, all effected nodes will receive a DEVICE_RM event. 264 */ 265 /* 266 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists 267 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap 268 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to / 269 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated, 270 * we will first process the ADISC list. 32 entries are processed initially and 271 * ADISC is initited for each one. Completions / Events for each node are 272 * funnelled thru the state machine. As each node finishes ADISC processing, it 273 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are 274 * waiting, and the ADISC list count is identically 0, then we are done. For 275 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we 276 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI 277 * list. 32 entries are processed initially and PLOGI is initited for each one. 278 * Completions / Events for each node are funnelled thru the state machine. As 279 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting 280 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is 281 * identically 0, then we are done. We have now completed discovery / RSCN 282 * handling. Upon completion, ALL nodes should be on either the mapped or 283 * unmapped lists. 284 */ 285 286 /* Defines for Node List Entry Events that could happen */ 287 #define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */ 288 #define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */ 289 #define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */ 290 #define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */ 291 #define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */ 292 #define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */ 293 #define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */ 294 #define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */ 295 #define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */ 296 #define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */ 297 #define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */ 298 #define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */ 299 #define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */ 300 #define NLP_EVT_MAX_EVENT 0xd 301 #define NLP_EVT_NOTHING_PENDING 0xff 302