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1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2021 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 */
34enum 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 */
48struct 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
55struct lpfc_scsi_check_condition_event;
56struct lpfc_scsi_varqueuedepth_event;
57struct lpfc_scsi_event_header;
58struct lpfc_fabric_event_header;
59struct lpfc_fcprdchkerr_event;
60
61/* structure used for sending events from fast path */
62struct 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)
76struct lpfc_node_rrqs {
77 unsigned long xri_bitmap[XRI_BITMAP_ULONGS];
78};
79
80enum lpfc_fc4_xpt_flags {
81 NLP_WAIT_FOR_UNREG = 0x1,
82 SCSI_XPT_REGD = 0x2,
83 NVME_XPT_REGD = 0x4,
84 NLP_XPT_HAS_HH = 0x8,
85};
86
87struct lpfc_nodelist {
88 struct list_head nlp_listp;
89 struct serv_parm fc_sparam; /* buffer for service params */
90 struct lpfc_name nlp_portname;
91 struct lpfc_name nlp_nodename;
92
93 spinlock_t lock; /* Node management lock */
94
95 uint32_t nlp_flag; /* entry flags */
96 uint32_t nlp_DID; /* FC D_ID of entry */
97 uint32_t nlp_last_elscmd; /* Last ELS cmd sent */
98 uint16_t nlp_type;
99#define NLP_FC_NODE 0x1 /* entry is an FC node */
100#define NLP_FABRIC 0x4 /* entry rep a Fabric entity */
101#define NLP_FCP_TARGET 0x8 /* entry is an FCP target */
102#define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */
103#define NLP_NVME_TARGET 0x20 /* entry is a NVME Target */
104#define NLP_NVME_INITIATOR 0x40 /* entry is a NVME Initiator */
105#define NLP_NVME_DISCOVERY 0x80 /* entry has NVME disc srvc */
106
107 uint16_t nlp_fc4_type; /* FC types node supports. */
108 /* Assigned from GID_FF, only
109 * FCP (0x8) and NVME (0x28)
110 * supported.
111 */
112#define NLP_FC4_NONE 0x0
113#define NLP_FC4_FCP 0x1 /* FC4 Type FCP (value x8)) */
114#define NLP_FC4_NVME 0x2 /* FC4 TYPE NVME (value x28) */
115
116 uint16_t nlp_rpi;
117 uint16_t nlp_state; /* state transition indicator */
118 uint16_t nlp_prev_state; /* state transition indicator */
119 uint16_t nlp_xri; /* output exchange id for RPI */
120 uint16_t nlp_sid; /* scsi id */
121#define NLP_NO_SID 0xffff
122 uint16_t nlp_maxframe; /* Max RCV frame size */
123 uint8_t nlp_class_sup; /* Supported Classes */
124 uint8_t nlp_retry; /* used for ELS retries */
125 uint8_t nlp_fcp_info; /* class info, bits 0-3 */
126#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */
127 u8 nlp_nvme_info; /* NVME NSLER Support */
128 uint8_t vmid_support; /* destination VMID support */
129#define NLP_NVME_NSLER 0x1 /* NVME NSLER device */
130
131 struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */
132 struct lpfc_hba *phba;
133 struct fc_rport *rport; /* scsi_transport_fc port structure */
134 struct lpfc_nvme_rport *nrport; /* nvme transport rport struct. */
135 struct lpfc_vport *vport;
136 struct lpfc_work_evt els_retry_evt;
137 struct lpfc_work_evt dev_loss_evt;
138 struct lpfc_work_evt recovery_evt;
139 struct kref kref;
140 atomic_t cmd_pending;
141 uint32_t cmd_qdepth;
142 unsigned long last_change_time;
143 unsigned long *active_rrqs_xri_bitmap;
144 struct lpfc_scsicmd_bkt *lat_data; /* Latency data */
145 uint32_t fc4_prli_sent;
146 u32 upcall_flags;
147#define NLP_WAIT_FOR_LOGO 0x2
148
149 enum lpfc_fc4_xpt_flags fc4_xpt_flags;
150
151 uint32_t nvme_fb_size; /* NVME target's supported byte cnt */
152#define NVME_FB_BIT_SHIFT 9 /* PRLI Rsp first burst in 512B units. */
153 uint32_t nlp_defer_did;
154 wait_queue_head_t *logo_waitq;
155};
156
157struct lpfc_node_rrq {
158 struct list_head list;
159 uint16_t xritag;
160 uint16_t send_rrq;
161 uint16_t rxid;
162 uint32_t nlp_DID; /* FC D_ID of entry */
163 struct lpfc_vport *vport;
164 unsigned long rrq_stop_time;
165};
166
167#define lpfc_ndlp_check_qdepth(phba, ndlp) \
168 (ndlp->cmd_qdepth < phba->sli4_hba.max_cfg_param.max_xri)
169
170/* Defines for nlp_flag (uint32) */
171#define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */
172#define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */
173#define NLP_RELEASE_RPI 0x00000004 /* Release RPI to free pool */
174#define NLP_SUPPRESS_RSP 0x00000010 /* Remote NPort supports suppress rsp */
175#define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */
176#define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */
177#define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */
178#define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */
179#define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */
180#define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */
181#define NLP_NVMET_RECOV 0x00001000 /* NVMET auditing node for recovery. */
182#define NLP_FCP_PRLI_RJT 0x00002000 /* Rport does not support FCP PRLI. */
183#define NLP_UNREG_INP 0x00008000 /* UNREG_RPI cmd is in progress */
184#define NLP_DROPPED 0x00010000 /* Init ref count has been dropped */
185#define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */
186#define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */
187#define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */
188#define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */
189#define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */
190#define NLP_ISSUE_LOGO 0x00400000 /* waiting to issue a LOGO */
191#define NLP_IN_DEV_LOSS 0x00800000 /* devloss in progress */
192#define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful
193 ACC */
194#define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from
195 NPR list */
196#define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */
197#define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */
198#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */
199#define NLP_SC_REQ 0x20000000 /* Target requires authentication */
200#define NLP_FIRSTBURST 0x40000000 /* Target supports FirstBurst */
201#define NLP_RPI_REGISTERED 0x80000000 /* nlp_rpi is valid */
202
203/* There are 4 different double linked lists nodelist entries can reside on.
204 * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
205 * when Link Up discovery or Registered State Change Notification (RSCN)
206 * processing is needed. Each list holds the nodes that require a PLOGI or
207 * ADISC Extended Link Service (ELS) request. These lists keep track of the
208 * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected
209 * by Link Up) event. The unmapped_list contains all nodes that have
210 * successfully logged into at the Fibre Channel level. The
211 * mapped_list will contain all nodes that are mapped FCP targets.
212 *
213 * The bind list is a list of undiscovered (potentially non-existent) nodes
214 * that we have saved binding information on. This information is used when
215 * nodes transition from the unmapped to the mapped list.
216 */
217
218/* Defines for nlp_state */
219#define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */
220#define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */
221#define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */
222#define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */
223#define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */
224#define NLP_STE_LOGO_ISSUE 0x5 /* LOGO was sent to NL_PORT */
225#define NLP_STE_UNMAPPED_NODE 0x6 /* PRLI completed from NL_PORT */
226#define NLP_STE_MAPPED_NODE 0x7 /* Identified as a FCP Target */
227#define NLP_STE_NPR_NODE 0x8 /* NPort disappeared */
228#define NLP_STE_MAX_STATE 0x9
229#define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */
230
231/* For UNUSED_NODE state, the node has just been allocated.
232 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
233 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
234 * and put on the unmapped list. For ADISC processing, the node is taken off
235 * the ADISC list and placed on either the mapped or unmapped list (depending
236 * on its previous state). Once on the unmapped list, a PRLI is issued and the
237 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
238 * changed to PRLI_COMPL. If the completion indicates a mapped
239 * node, the node is taken off the unmapped list. The binding list is checked
240 * for a valid binding, or a binding is automatically assigned. If binding
241 * assignment is unsuccessful, the node is left on the unmapped list. If
242 * binding assignment is successful, the associated binding list entry (if
243 * any) is removed, and the node is placed on the mapped list.
244 */
245/*
246 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
247 * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
248 * expire, all effected nodes will receive a DEVICE_RM event.
249 */
250/*
251 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
252 * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap
253 * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /
254 * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
255 * we will first process the ADISC list. 32 entries are processed initially and
256 * ADISC is initited for each one. Completions / Events for each node are
257 * funnelled thru the state machine. As each node finishes ADISC processing, it
258 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
259 * waiting, and the ADISC list count is identically 0, then we are done. For
260 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
261 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
262 * list. 32 entries are processed initially and PLOGI is initited for each one.
263 * Completions / Events for each node are funnelled thru the state machine. As
264 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
265 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
266 * identically 0, then we are done. We have now completed discovery / RSCN
267 * handling. Upon completion, ALL nodes should be on either the mapped or
268 * unmapped lists.
269 */
270
271/* Defines for Node List Entry Events that could happen */
272#define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */
273#define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */
274#define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */
275#define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */
276#define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */
277#define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */
278#define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */
279#define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */
280#define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */
281#define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */
282#define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */
283#define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */
284#define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */
285#define NLP_EVT_MAX_EVENT 0xd
286#define NLP_EVT_NOTHING_PENDING 0xff