086a345f9d
Make compliant with FC specs by sending LOGO after ABTS timeouts Signed-off-by: James Smart <james.smart@emulex.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
267 lines
13 KiB
C
267 lines
13 KiB
C
/*******************************************************************
|
|
* This file is part of the Emulex Linux Device Driver for *
|
|
* Fibre Channel Host Bus Adapters. *
|
|
* Copyright (C) 2004-2008 Emulex. All rights reserved. *
|
|
* EMULEX and SLI are trademarks of Emulex. *
|
|
* www.emulex.com *
|
|
* *
|
|
* This program is free software; you can redistribute it and/or *
|
|
* modify it under the terms of version 2 of the GNU General *
|
|
* Public License as published by the Free Software Foundation. *
|
|
* This program is distributed in the hope that it will be useful. *
|
|
* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
|
|
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
|
|
* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
|
|
* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
|
|
* TO BE LEGALLY INVALID. See the GNU General Public License for *
|
|
* more details, a copy of which can be found in the file COPYING *
|
|
* included with this package. *
|
|
*******************************************************************/
|
|
|
|
#define FC_MAX_HOLD_RSCN 32 /* max number of deferred RSCNs */
|
|
#define FC_MAX_NS_RSP 64512 /* max size NameServer rsp */
|
|
#define FC_MAXLOOP 126 /* max devices supported on a fc loop */
|
|
#define LPFC_DISC_FLOGI_TMO 10 /* Discovery FLOGI ratov */
|
|
|
|
|
|
/* This is the protocol dependent definition for a Node List Entry.
|
|
* This is used by Fibre Channel protocol to support FCP.
|
|
*/
|
|
|
|
/* worker thread events */
|
|
enum lpfc_work_type {
|
|
LPFC_EVT_ONLINE,
|
|
LPFC_EVT_OFFLINE_PREP,
|
|
LPFC_EVT_OFFLINE,
|
|
LPFC_EVT_WARM_START,
|
|
LPFC_EVT_KILL,
|
|
LPFC_EVT_ELS_RETRY,
|
|
LPFC_EVT_DEV_LOSS,
|
|
LPFC_EVT_FASTPATH_MGMT_EVT,
|
|
LPFC_EVT_RESET_HBA,
|
|
};
|
|
|
|
/* structure used to queue event to the discovery tasklet */
|
|
struct lpfc_work_evt {
|
|
struct list_head evt_listp;
|
|
void *evt_arg1;
|
|
void *evt_arg2;
|
|
enum lpfc_work_type evt;
|
|
};
|
|
|
|
struct lpfc_scsi_check_condition_event;
|
|
struct lpfc_scsi_varqueuedepth_event;
|
|
struct lpfc_scsi_event_header;
|
|
struct lpfc_fabric_event_header;
|
|
struct lpfc_fcprdchkerr_event;
|
|
|
|
/* structure used for sending events from fast path */
|
|
struct lpfc_fast_path_event {
|
|
struct lpfc_work_evt work_evt;
|
|
struct lpfc_vport *vport;
|
|
union {
|
|
struct lpfc_scsi_check_condition_event check_cond_evt;
|
|
struct lpfc_scsi_varqueuedepth_event queue_depth_evt;
|
|
struct lpfc_scsi_event_header scsi_evt;
|
|
struct lpfc_fabric_event_header fabric_evt;
|
|
struct lpfc_fcprdchkerr_event read_check_error;
|
|
} un;
|
|
};
|
|
|
|
#define LPFC_SLI4_MAX_XRI 1024 /* Used to make the ndlp's xri_bitmap */
|
|
#define XRI_BITMAP_ULONGS (LPFC_SLI4_MAX_XRI / BITS_PER_LONG)
|
|
struct lpfc_node_rrqs {
|
|
unsigned long xri_bitmap[XRI_BITMAP_ULONGS];
|
|
};
|
|
|
|
struct lpfc_nodelist {
|
|
struct list_head nlp_listp;
|
|
struct lpfc_name nlp_portname;
|
|
struct lpfc_name nlp_nodename;
|
|
uint32_t nlp_flag; /* entry flags */
|
|
uint32_t nlp_DID; /* FC D_ID of entry */
|
|
uint32_t nlp_last_elscmd; /* Last ELS cmd sent */
|
|
uint16_t nlp_type;
|
|
#define NLP_FC_NODE 0x1 /* entry is an FC node */
|
|
#define NLP_FABRIC 0x4 /* entry rep a Fabric entity */
|
|
#define NLP_FCP_TARGET 0x8 /* entry is an FCP target */
|
|
#define NLP_FCP_INITIATOR 0x10 /* entry is an FCP Initiator */
|
|
|
|
uint16_t nlp_rpi;
|
|
uint16_t nlp_state; /* state transition indicator */
|
|
uint16_t nlp_prev_state; /* state transition indicator */
|
|
uint16_t nlp_xri; /* output exchange id for RPI */
|
|
uint16_t nlp_sid; /* scsi id */
|
|
#define NLP_NO_SID 0xffff
|
|
uint16_t nlp_maxframe; /* Max RCV frame size */
|
|
uint8_t nlp_class_sup; /* Supported Classes */
|
|
uint8_t nlp_retry; /* used for ELS retries */
|
|
uint8_t nlp_fcp_info; /* class info, bits 0-3 */
|
|
#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */
|
|
|
|
uint16_t nlp_usg_map; /* ndlp management usage bitmap */
|
|
#define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */
|
|
#define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */
|
|
#define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */
|
|
#define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */
|
|
|
|
struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */
|
|
struct lpfc_hba *phba;
|
|
struct fc_rport *rport; /* Corresponding FC transport
|
|
port structure */
|
|
struct lpfc_vport *vport;
|
|
struct lpfc_work_evt els_retry_evt;
|
|
struct lpfc_work_evt dev_loss_evt;
|
|
struct kref kref;
|
|
atomic_t cmd_pending;
|
|
uint32_t cmd_qdepth;
|
|
unsigned long last_change_time;
|
|
struct lpfc_node_rrqs active_rrqs;
|
|
struct lpfc_scsicmd_bkt *lat_data; /* Latency data */
|
|
};
|
|
struct lpfc_node_rrq {
|
|
struct list_head list;
|
|
uint16_t xritag;
|
|
uint16_t send_rrq;
|
|
uint16_t rxid;
|
|
uint32_t nlp_DID; /* FC D_ID of entry */
|
|
struct lpfc_vport *vport;
|
|
struct lpfc_nodelist *ndlp;
|
|
unsigned long rrq_stop_time;
|
|
};
|
|
|
|
/* Defines for nlp_flag (uint32) */
|
|
#define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */
|
|
#define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */
|
|
#define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */
|
|
#define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */
|
|
#define NLP_ADISC_SND 0x00000080 /* sent ADISC request for this entry */
|
|
#define NLP_LOGO_SND 0x00000100 /* sent LOGO request for this entry */
|
|
#define NLP_RNID_SND 0x00000400 /* sent RNID request for this entry */
|
|
#define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */
|
|
#define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */
|
|
#define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */
|
|
#define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */
|
|
#define NLP_RCV_PLOGI 0x00080000 /* Rcv'ed PLOGI from remote system */
|
|
#define NLP_LOGO_ACC 0x00100000 /* Process LOGO after ACC completes */
|
|
#define NLP_TGT_NO_SCSIID 0x00200000 /* good PRLI but no binding for scsid */
|
|
#define NLP_ISSUE_LOGO 0x00400000 /* waiting to issue a LOGO */
|
|
#define NLP_ACC_REGLOGIN 0x01000000 /* Issue Reg Login after successful
|
|
ACC */
|
|
#define NLP_NPR_ADISC 0x02000000 /* Issue ADISC when dq'ed from
|
|
NPR list */
|
|
#define NLP_RM_DFLT_RPI 0x04000000 /* need to remove leftover dflt RPI */
|
|
#define NLP_NODEV_REMOVE 0x08000000 /* Defer removal till discovery ends */
|
|
#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */
|
|
#define NLP_SC_REQ 0x20000000 /* Target requires authentication */
|
|
#define NLP_RPI_REGISTERED 0x80000000 /* nlp_rpi is valid */
|
|
|
|
/* ndlp usage management macros */
|
|
#define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \
|
|
& NLP_USG_NODE_ACT_BIT) \
|
|
&& \
|
|
!((ndlp)->nlp_usg_map \
|
|
& NLP_USG_FREE_ACK_BIT))
|
|
#define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
|
|
|= NLP_USG_NODE_ACT_BIT)
|
|
#define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
|
|
= NLP_USG_NODE_ACT_BIT)
|
|
#define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
|
|
&= ~NLP_USG_NODE_ACT_BIT)
|
|
#define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
|
|
& NLP_USG_IACT_REQ_BIT)
|
|
#define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
|
|
|= NLP_USG_IACT_REQ_BIT)
|
|
#define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
|
|
& NLP_USG_FREE_REQ_BIT)
|
|
#define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
|
|
|= NLP_USG_FREE_REQ_BIT)
|
|
#define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
|
|
& NLP_USG_FREE_ACK_BIT)
|
|
#define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
|
|
|= NLP_USG_FREE_ACK_BIT)
|
|
|
|
/* There are 4 different double linked lists nodelist entries can reside on.
|
|
* The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
|
|
* when Link Up discovery or Registered State Change Notification (RSCN)
|
|
* processing is needed. Each list holds the nodes that require a PLOGI or
|
|
* ADISC Extended Link Service (ELS) request. These lists keep track of the
|
|
* nodes affected by an RSCN, or a Link Up (Typically, all nodes are effected
|
|
* by Link Up) event. The unmapped_list contains all nodes that have
|
|
* successfully logged into at the Fibre Channel level. The
|
|
* mapped_list will contain all nodes that are mapped FCP targets.
|
|
*
|
|
* The bind list is a list of undiscovered (potentially non-existent) nodes
|
|
* that we have saved binding information on. This information is used when
|
|
* nodes transition from the unmapped to the mapped list.
|
|
*/
|
|
|
|
/* Defines for nlp_state */
|
|
#define NLP_STE_UNUSED_NODE 0x0 /* node is just allocated */
|
|
#define NLP_STE_PLOGI_ISSUE 0x1 /* PLOGI was sent to NL_PORT */
|
|
#define NLP_STE_ADISC_ISSUE 0x2 /* ADISC was sent to NL_PORT */
|
|
#define NLP_STE_REG_LOGIN_ISSUE 0x3 /* REG_LOGIN was issued for NL_PORT */
|
|
#define NLP_STE_PRLI_ISSUE 0x4 /* PRLI was sent to NL_PORT */
|
|
#define NLP_STE_LOGO_ISSUE 0x5 /* LOGO was sent to NL_PORT */
|
|
#define NLP_STE_UNMAPPED_NODE 0x6 /* PRLI completed from NL_PORT */
|
|
#define NLP_STE_MAPPED_NODE 0x7 /* Identified as a FCP Target */
|
|
#define NLP_STE_NPR_NODE 0x8 /* NPort disappeared */
|
|
#define NLP_STE_MAX_STATE 0x9
|
|
#define NLP_STE_FREED_NODE 0xff /* node entry was freed to MEM_NLP */
|
|
|
|
/* For UNUSED_NODE state, the node has just been allocated.
|
|
* For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
|
|
* the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
|
|
* and put on the unmapped list. For ADISC processing, the node is taken off
|
|
* the ADISC list and placed on either the mapped or unmapped list (depending
|
|
* on its previous state). Once on the unmapped list, a PRLI is issued and the
|
|
* state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
|
|
* changed to PRLI_COMPL. If the completion indicates a mapped
|
|
* node, the node is taken off the unmapped list. The binding list is checked
|
|
* for a valid binding, or a binding is automatically assigned. If binding
|
|
* assignment is unsuccessful, the node is left on the unmapped list. If
|
|
* binding assignment is successful, the associated binding list entry (if
|
|
* any) is removed, and the node is placed on the mapped list.
|
|
*/
|
|
/*
|
|
* For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
|
|
* lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
|
|
* expire, all effected nodes will receive a DEVICE_RM event.
|
|
*/
|
|
/*
|
|
* For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
|
|
* to either the ADISC or PLOGI list. After a Nameserver query or ALPA loopmap
|
|
* check, additional nodes may be added (DEVICE_ADD) or removed (DEVICE_RM) to /
|
|
* from the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
|
|
* we will first process the ADISC list. 32 entries are processed initially and
|
|
* ADISC is initited for each one. Completions / Events for each node are
|
|
* funnelled thru the state machine. As each node finishes ADISC processing, it
|
|
* starts ADISC for any nodes waiting for ADISC processing. If no nodes are
|
|
* waiting, and the ADISC list count is identically 0, then we are done. For
|
|
* Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
|
|
* can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
|
|
* list. 32 entries are processed initially and PLOGI is initited for each one.
|
|
* Completions / Events for each node are funnelled thru the state machine. As
|
|
* each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
|
|
* for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
|
|
* identically 0, then we are done. We have now completed discovery / RSCN
|
|
* handling. Upon completion, ALL nodes should be on either the mapped or
|
|
* unmapped lists.
|
|
*/
|
|
|
|
/* Defines for Node List Entry Events that could happen */
|
|
#define NLP_EVT_RCV_PLOGI 0x0 /* Rcv'd an ELS PLOGI command */
|
|
#define NLP_EVT_RCV_PRLI 0x1 /* Rcv'd an ELS PRLI command */
|
|
#define NLP_EVT_RCV_LOGO 0x2 /* Rcv'd an ELS LOGO command */
|
|
#define NLP_EVT_RCV_ADISC 0x3 /* Rcv'd an ELS ADISC command */
|
|
#define NLP_EVT_RCV_PDISC 0x4 /* Rcv'd an ELS PDISC command */
|
|
#define NLP_EVT_RCV_PRLO 0x5 /* Rcv'd an ELS PRLO command */
|
|
#define NLP_EVT_CMPL_PLOGI 0x6 /* Sent an ELS PLOGI command */
|
|
#define NLP_EVT_CMPL_PRLI 0x7 /* Sent an ELS PRLI command */
|
|
#define NLP_EVT_CMPL_LOGO 0x8 /* Sent an ELS LOGO command */
|
|
#define NLP_EVT_CMPL_ADISC 0x9 /* Sent an ELS ADISC command */
|
|
#define NLP_EVT_CMPL_REG_LOGIN 0xa /* REG_LOGIN mbox cmd completed */
|
|
#define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */
|
|
#define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */
|
|
#define NLP_EVT_MAX_EVENT 0xd
|
|
|