269 lines
10 KiB
C
269 lines
10 KiB
C
/*******************************************************************
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* This file is part of the Emulex Linux Device Driver for *
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* Fibre Channel Host Bus Adapters. *
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* Copyright (C) 2004-2007 Emulex. All rights reserved. *
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* EMULEX and SLI are trademarks of Emulex. *
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* www.emulex.com *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of version 2 of the GNU General *
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* Public License as published by the Free Software Foundation. *
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* This program is distributed in the hope that it will be useful. *
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* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
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* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
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* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
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* TO BE LEGALLY INVALID. See the GNU General Public License for *
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* more details, a copy of which can be found in the file COPYING *
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* included with this package. *
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*******************************************************************/
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/* forward declaration for LPFC_IOCB_t's use */
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struct lpfc_hba;
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struct lpfc_vport;
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/* Define the context types that SLI handles for abort and sums. */
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typedef enum _lpfc_ctx_cmd {
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LPFC_CTX_LUN,
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LPFC_CTX_TGT,
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LPFC_CTX_HOST
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} lpfc_ctx_cmd;
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/* This structure is used to handle IOCB requests / responses */
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struct lpfc_iocbq {
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/* lpfc_iocbqs are used in double linked lists */
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struct list_head list;
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struct list_head clist;
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uint16_t iotag; /* pre-assigned IO tag */
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uint16_t rsvd1;
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IOCB_t iocb; /* IOCB cmd */
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uint8_t retry; /* retry counter for IOCB cmd - if needed */
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uint8_t iocb_flag;
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#define LPFC_IO_LIBDFC 1 /* libdfc iocb */
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#define LPFC_IO_WAKE 2 /* High Priority Queue signal flag */
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#define LPFC_IO_FCP 4 /* FCP command -- iocbq in scsi_buf */
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#define LPFC_DRIVER_ABORTED 8 /* driver aborted this request */
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#define LPFC_IO_FABRIC 0x10 /* Iocb send using fabric scheduler */
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#define LPFC_DELAY_MEM_FREE 0x20 /* Defer free'ing of FC data */
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uint8_t abort_count;
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uint8_t rsvd2;
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uint32_t drvrTimeout; /* driver timeout in seconds */
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struct lpfc_vport *vport;/* virtual port pointer */
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void *context1; /* caller context information */
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void *context2; /* caller context information */
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void *context3; /* caller context information */
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union {
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wait_queue_head_t *wait_queue;
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struct lpfc_iocbq *rsp_iocb;
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struct lpfcMboxq *mbox;
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struct lpfc_nodelist *ndlp;
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} context_un;
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void (*fabric_iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
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struct lpfc_iocbq *);
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void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
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struct lpfc_iocbq *);
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};
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#define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */
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#define IOCB_SUCCESS 0
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#define IOCB_BUSY 1
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#define IOCB_ERROR 2
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#define IOCB_TIMEDOUT 3
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#define LPFC_MBX_WAKE 1
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#define LPFC_MBX_IMED_UNREG 2
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typedef struct lpfcMboxq {
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/* MBOXQs are used in single linked lists */
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struct list_head list; /* ptr to next mailbox command */
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MAILBOX_t mb; /* Mailbox cmd */
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struct lpfc_vport *vport;/* virutal port pointer */
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void *context1; /* caller context information */
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void *context2; /* caller context information */
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void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
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uint8_t mbox_flag;
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} LPFC_MBOXQ_t;
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#define MBX_POLL 1 /* poll mailbox till command done, then
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return */
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#define MBX_NOWAIT 2 /* issue command then return immediately */
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#define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per
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ring */
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#define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */
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struct lpfc_sli_ring;
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struct lpfc_sli_ring_mask {
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uint8_t profile; /* profile associated with ring */
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uint8_t rctl; /* rctl / type pair configured for ring */
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uint8_t type; /* rctl / type pair configured for ring */
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uint8_t rsvd;
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/* rcv'd unsol event */
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void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
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struct lpfc_sli_ring *,
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struct lpfc_iocbq *);
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};
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/* Structure used to hold SLI statistical counters and info */
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struct lpfc_sli_ring_stat {
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uint64_t iocb_event; /* IOCB event counters */
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uint64_t iocb_cmd; /* IOCB cmd issued */
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uint64_t iocb_rsp; /* IOCB rsp received */
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uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
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uint64_t iocb_cmd_full; /* IOCB cmd ring full */
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uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
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uint64_t iocb_rsp_full; /* IOCB rsp ring full */
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};
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/* Structure used to hold SLI ring information */
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struct lpfc_sli_ring {
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uint16_t flag; /* ring flags */
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#define LPFC_DEFERRED_RING_EVENT 0x001 /* Deferred processing a ring event */
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#define LPFC_CALL_RING_AVAILABLE 0x002 /* indicates cmd was full */
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#define LPFC_STOP_IOCB_EVENT 0x020 /* Stop processing IOCB cmds event */
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uint16_t abtsiotag; /* tracks next iotag to use for ABTS */
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uint32_t local_getidx; /* last available cmd index (from cmdGetInx) */
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uint32_t next_cmdidx; /* next_cmd index */
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uint32_t rspidx; /* current index in response ring */
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uint32_t cmdidx; /* current index in command ring */
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uint8_t rsvd;
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uint8_t ringno; /* ring number */
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uint16_t numCiocb; /* number of command iocb's per ring */
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uint16_t numRiocb; /* number of rsp iocb's per ring */
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uint16_t sizeCiocb; /* Size of command iocb's in this ring */
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uint16_t sizeRiocb; /* Size of response iocb's in this ring */
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uint32_t fast_iotag; /* max fastlookup based iotag */
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uint32_t iotag_ctr; /* keeps track of the next iotag to use */
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uint32_t iotag_max; /* max iotag value to use */
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struct list_head txq;
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uint16_t txq_cnt; /* current length of queue */
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uint16_t txq_max; /* max length */
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struct list_head txcmplq;
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uint16_t txcmplq_cnt; /* current length of queue */
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uint16_t txcmplq_max; /* max length */
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uint32_t *cmdringaddr; /* virtual address for cmd rings */
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uint32_t *rspringaddr; /* virtual address for rsp rings */
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uint32_t missbufcnt; /* keep track of buffers to post */
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struct list_head postbufq;
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uint16_t postbufq_cnt; /* current length of queue */
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uint16_t postbufq_max; /* max length */
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struct list_head iocb_continueq;
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uint16_t iocb_continueq_cnt; /* current length of queue */
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uint16_t iocb_continueq_max; /* max length */
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struct list_head iocb_continue_saveq;
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struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
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uint32_t num_mask; /* number of mask entries in prt array */
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void (*lpfc_sli_rcv_async_status) (struct lpfc_hba *,
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struct lpfc_sli_ring *, struct lpfc_iocbq *);
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struct lpfc_sli_ring_stat stats; /* SLI statistical info */
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/* cmd ring available */
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void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
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struct lpfc_sli_ring *);
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};
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/* Structure used for configuring rings to a specific profile or rctl / type */
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struct lpfc_hbq_init {
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uint32_t rn; /* Receive buffer notification */
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uint32_t entry_count; /* max # of entries in HBQ */
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uint32_t headerLen; /* 0 if not profile 4 or 5 */
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uint32_t logEntry; /* Set to 1 if this HBQ used for LogEntry */
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uint32_t profile; /* Selection profile 0=all, 7=logentry */
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uint32_t ring_mask; /* Binds HBQ to a ring e.g. Ring0=b0001,
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* ring2=b0100 */
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uint32_t hbq_index; /* index of this hbq in ring .HBQs[] */
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uint32_t seqlenoff;
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uint32_t maxlen;
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uint32_t seqlenbcnt;
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uint32_t cmdcodeoff;
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uint32_t cmdmatch[8];
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uint32_t mask_count; /* number of mask entries in prt array */
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struct hbq_mask hbqMasks[6];
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/* Non-config rings fields to keep track of buffer allocations */
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uint32_t buffer_count; /* number of buffers allocated */
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uint32_t init_count; /* number to allocate when initialized */
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uint32_t add_count; /* number to allocate when starved */
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} ;
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/* Structure used to hold SLI statistical counters and info */
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struct lpfc_sli_stat {
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uint64_t mbox_stat_err; /* Mbox cmds completed status error */
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uint64_t mbox_cmd; /* Mailbox commands issued */
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uint64_t sli_intr; /* Count of Host Attention interrupts */
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uint32_t err_attn_event; /* Error Attn event counters */
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uint32_t link_event; /* Link event counters */
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uint32_t mbox_event; /* Mailbox event counters */
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uint32_t mbox_busy; /* Mailbox cmd busy */
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};
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/* Structure to store link status values when port stats are reset */
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struct lpfc_lnk_stat {
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uint32_t link_failure_count;
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uint32_t loss_of_sync_count;
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uint32_t loss_of_signal_count;
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uint32_t prim_seq_protocol_err_count;
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uint32_t invalid_tx_word_count;
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uint32_t invalid_crc_count;
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uint32_t error_frames;
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uint32_t link_events;
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};
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/* Structure used to hold SLI information */
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struct lpfc_sli {
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uint32_t num_rings;
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uint32_t sli_flag;
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/* Additional sli_flags */
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#define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */
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#define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */
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#define LPFC_PROCESS_LA 0x400 /* Able to process link attention */
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#define LPFC_BLOCK_MGMT_IO 0x800 /* Don't allow mgmt mbx or iocb cmds */
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struct lpfc_sli_ring ring[LPFC_MAX_RING];
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int fcp_ring; /* ring used for FCP initiator commands */
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int next_ring;
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int extra_ring; /* extra ring used for other protocols */
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struct lpfc_sli_stat slistat; /* SLI statistical info */
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struct list_head mboxq;
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uint16_t mboxq_cnt; /* current length of queue */
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uint16_t mboxq_max; /* max length */
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LPFC_MBOXQ_t *mbox_active; /* active mboxq information */
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struct list_head mboxq_cmpl;
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struct timer_list mbox_tmo; /* Hold clk to timeout active mbox
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cmd */
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#define LPFC_IOCBQ_LOOKUP_INCREMENT 1024
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struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
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size_t iocbq_lookup_len; /* current lengs of the array */
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uint16_t last_iotag; /* last allocated IOTAG */
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unsigned long stats_start; /* in seconds */
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struct lpfc_lnk_stat lnk_stat_offsets;
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};
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#define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox
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command */
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#define LPFC_MBOX_TMO_FLASH_CMD 300 /* Sec tmo for outstanding FLASH write
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* or erase cmds. This is especially
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* long because of the potential of
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* multiple flash erases that can be
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* spawned.
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*/
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