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dea3101e | 1 | /******************************************************************* |
2 | * This file is part of the Emulex Linux Device Driver for * | |
c44ce173 | 3 | * Fibre Channel Host Bus Adapters. * |
e47c9093 | 4 | * Copyright (C) 2004-2008 Emulex. All rights reserved. * |
c44ce173 | 5 | * EMULEX and SLI are trademarks of Emulex. * |
dea3101e | 6 | * www.emulex.com * |
7 | * * | |
8 | * This program is free software; you can redistribute it and/or * | |
c44ce173 JSEC |
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. * | |
dea3101e | 19 | *******************************************************************/ |
20 | ||
dea3101e | 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 | ||
41415862 JW |
31 | /* worker thread events */ |
32 | enum lpfc_work_type { | |
41415862 | 33 | LPFC_EVT_ONLINE, |
46fa311e | 34 | LPFC_EVT_OFFLINE_PREP, |
41415862 JW |
35 | LPFC_EVT_OFFLINE, |
36 | LPFC_EVT_WARM_START, | |
37 | LPFC_EVT_KILL, | |
38 | LPFC_EVT_ELS_RETRY, | |
92d7f7b0 | 39 | LPFC_EVT_DEV_LOSS, |
ea2151b4 | 40 | LPFC_EVT_FASTPATH_MGMT_EVT, |
41415862 JW |
41 | }; |
42 | ||
dea3101e | 43 | /* structure used to queue event to the discovery tasklet */ |
44 | struct lpfc_work_evt { | |
45 | struct list_head evt_listp; | |
92d7f7b0 JS |
46 | void *evt_arg1; |
47 | void *evt_arg2; | |
41415862 | 48 | enum lpfc_work_type evt; |
dea3101e | 49 | }; |
50 | ||
ea2151b4 JS |
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 | }; | |
dea3101e | 69 | |
70 | struct lpfc_nodelist { | |
71 | struct list_head nlp_listp; | |
2e0fef85 JS |
72 | struct lpfc_name nlp_portname; |
73 | struct lpfc_name nlp_nodename; | |
dea3101e | 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 */ | |
5024ab17 | 85 | uint16_t nlp_prev_state; /* state transition indicator */ |
dea3101e | 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 */ | |
dea3101e | 92 | uint8_t nlp_fcp_info; /* class info, bits 0-3 */ |
93 | #define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */ | |
94 | ||
e47c9093 JS |
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 | ||
dea3101e | 101 | struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */ |
a257bf90 | 102 | struct lpfc_hba *phba; |
dea3101e | 103 | struct fc_rport *rport; /* Corresponding FC transport |
104 | port structure */ | |
2e0fef85 | 105 | struct lpfc_vport *vport; |
dea3101e | 106 | struct lpfc_work_evt els_retry_evt; |
92d7f7b0 | 107 | struct lpfc_work_evt dev_loss_evt; |
445cf4f4 JSEC |
108 | unsigned long last_ramp_up_time; /* jiffy of last ramp up */ |
109 | unsigned long last_q_full_time; /* jiffy of last queue full */ | |
329f9bc7 | 110 | struct kref kref; |
977b5a0a JS |
111 | atomic_t cmd_pending; |
112 | uint32_t cmd_qdepth; | |
113 | unsigned long last_change_time; | |
ea2151b4 | 114 | struct lpfc_scsicmd_bkt *lat_data; /* Latency data */ |
dea3101e | 115 | }; |
116 | ||
117 | /* Defines for nlp_flag (uint32) */ | |
7f5f3d0d JS |
118 | #define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */ |
119 | #define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */ | |
120 | #define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */ | |
121 | #define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */ | |
122 | #define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */ | |
123 | #define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */ | |
124 | #define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */ | |
125 | #define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */ | |
126 | #define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */ | |
127 | #define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */ | |
128 | #define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */ | |
129 | #define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */ | |
130 | #define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful | |
dea3101e | 131 | ACC */ |
7f5f3d0d | 132 | #define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from |
dea3101e | 133 | NPR list */ |
7f5f3d0d JS |
134 | #define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */ |
135 | #define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */ | |
92d7f7b0 | 136 | #define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */ |
7f5f3d0d | 137 | #define NLP_SC_REQ 0x20000000 /* Target requires authentication */ |
dea3101e | 138 | |
e47c9093 JS |
139 | /* ndlp usage management macros */ |
140 | #define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \ | |
141 | & NLP_USG_NODE_ACT_BIT) \ | |
142 | && \ | |
143 | !((ndlp)->nlp_usg_map \ | |
144 | & NLP_USG_FREE_ACK_BIT)) | |
145 | #define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ | |
146 | |= NLP_USG_NODE_ACT_BIT) | |
147 | #define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ | |
148 | = NLP_USG_NODE_ACT_BIT) | |
149 | #define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \ | |
150 | &= ~NLP_USG_NODE_ACT_BIT) | |
151 | #define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ | |
152 | & NLP_USG_IACT_REQ_BIT) | |
153 | #define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \ | |
154 | |= NLP_USG_IACT_REQ_BIT) | |
155 | #define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ | |
156 | & NLP_USG_FREE_REQ_BIT) | |
157 | #define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \ | |
158 | |= NLP_USG_FREE_REQ_BIT) | |
159 | #define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ | |
160 | & NLP_USG_FREE_ACK_BIT) | |
161 | #define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \ | |
162 | |= NLP_USG_FREE_ACK_BIT) | |
163 | ||
dea3101e | 164 | /* There are 4 different double linked lists nodelist entries can reside on. |
165 | * The Port Login (PLOGI) list and Address Discovery (ADISC) list are used | |
166 | * when Link Up discovery or Registered State Change Notification (RSCN) | |
167 | * processing is needed. Each list holds the nodes that require a PLOGI or | |
168 | * ADISC Extended Link Service (ELS) request. These lists keep track of the | |
169 | * nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected | |
170 | * by Link Up) event. The unmapped_list contains all nodes that have | |
171 | * successfully logged into at the Fibre Channel level. The | |
172 | * mapped_list will contain all nodes that are mapped FCP targets. | |
173 | * | |
174 | * The bind list is a list of undiscovered (potentially non-existent) nodes | |
175 | * that we have saved binding information on. This information is used when | |
176 | * nodes transition from the unmapped to the mapped list. | |
177 | */ | |
178 | ||
179 | /* Defines for nlp_state */ | |
180 | #define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */ | |
181 | #define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */ | |
182 | #define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */ | |
183 | #define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */ | |
184 | #define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */ | |
185 | #define NLP_STE_UNMAPPED_NODE 0x5 /* PRLI completed from NL_PORT */ | |
186 | #define NLP_STE_MAPPED_NODE 0x6 /* Identified as a FCP Target */ | |
187 | #define NLP_STE_NPR_NODE 0x7 /* NPort disappeared */ | |
188 | #define NLP_STE_MAX_STATE 0x8 | |
189 | #define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */ | |
190 | ||
191 | /* For UNUSED_NODE state, the node has just been allocated. | |
192 | * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on | |
193 | * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list | |
194 | * and put on the unmapped list. For ADISC processing, the node is taken off | |
195 | * the ADISC list and placed on either the mapped or unmapped list (depending | |
196 | * on its previous state). Once on the unmapped list, a PRLI is issued and the | |
197 | * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is | |
198 | * changed to PRLI_COMPL. If the completion indicates a mapped | |
199 | * node, the node is taken off the unmapped list. The binding list is checked | |
200 | * for a valid binding, or a binding is automatically assigned. If binding | |
201 | * assignment is unsuccessful, the node is left on the unmapped list. If | |
202 | * binding assignment is successful, the associated binding list entry (if | |
203 | * any) is removed, and the node is placed on the mapped list. | |
204 | */ | |
205 | /* | |
206 | * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped | |
c01f3208 | 207 | * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers |
dea3101e | 208 | * expire, all effected nodes will receive a DEVICE_RM event. |
209 | */ | |
210 | /* | |
211 | * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists | |
212 | * to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap | |
213 | * check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to / | |
214 | * from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated, | |
215 | * we will first process the ADISC list. 32 entries are processed initially and | |
216 | * ADISC is initited for each one. Completions / Events for each node are | |
217 | * funnelled thru the state machine. As each node finishes ADISC processing, it | |
218 | * starts ADISC for any nodes waiting for ADISC processing. If no nodes are | |
219 | * waiting, and the ADISC list count is identically 0, then we are done. For | |
220 | * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we | |
221 | * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI | |
222 | * list. 32 entries are processed initially and PLOGI is initited for each one. | |
223 | * Completions / Events for each node are funnelled thru the state machine. As | |
224 | * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting | |
225 | * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is | |
226 | * identically 0, then we are done. We have now completed discovery / RSCN | |
227 | * handling. Upon completion, ALL nodes should be on either the mapped or | |
228 | * unmapped lists. | |
229 | */ | |
230 | ||
231 | /* Defines for Node List Entry Events that could happen */ | |
232 | #define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */ | |
233 | #define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */ | |
234 | #define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */ | |
235 | #define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */ | |
236 | #define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */ | |
237 | #define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */ | |
238 | #define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */ | |
239 | #define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */ | |
240 | #define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */ | |
241 | #define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */ | |
242 | #define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */ | |
243 | #define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */ | |
244 | #define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */ | |
245 | #define NLP_EVT_MAX_EVENT 0xd | |
246 |