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/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2004-2006 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. *
*******************************************************************/
/* forward declaration for LPFC_IOCB_t's use */
struct lpfc_hba;
/* Define the context types that SLI handles for abort and sums. */
typedef enum _lpfc_ctx_cmd {
LPFC_CTX_LUN,
LPFC_CTX_TGT,
LPFC_CTX_CTX,
LPFC_CTX_HOST
} lpfc_ctx_cmd;
/* This structure is used to handle IOCB requests / responses */
struct lpfc_iocbq {
/* lpfc_iocbqs are used in double linked lists */
struct list_head list;
uint16_t iotag; /* pre-assigned IO tag */
uint16_t rsvd1;
IOCB_t iocb; /* IOCB cmd */
uint8_t retry; /* retry counter for IOCB cmd - if needed */
uint8_t iocb_flag;
#define LPFC_IO_LIBDFC 1 /* libdfc iocb */
#define LPFC_IO_WAKE 2 /* High Priority Queue signal flag */
#define LPFC_IO_FCP 4 /* FCP command -- iocbq in scsi_buf */
uint8_t abort_count;
uint8_t rsvd2;
uint32_t drvrTimeout; /* driver timeout in seconds */
void *context1; /* caller context information */
void *context2; /* caller context information */
void *context3; /* caller context information */
union {
wait_queue_head_t *wait_queue;
struct lpfc_iocbq *rsp_iocb;
struct lpfcMboxq *mbox;
} context_un;
void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
struct lpfc_iocbq *);
};
#define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */
#define IOCB_SUCCESS 0
#define IOCB_BUSY 1
#define IOCB_ERROR 2
#define IOCB_TIMEDOUT 3
typedef struct lpfcMboxq {
/* MBOXQs are used in single linked lists */
struct list_head list; /* ptr to next mailbox command */
MAILBOX_t mb; /* Mailbox cmd */
void *context1; /* caller context information */
void *context2; /* caller context information */
void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
} LPFC_MBOXQ_t;
#define MBX_POLL 1 /* poll mailbox till command done, then
return */
#define MBX_NOWAIT 2 /* issue command then return immediately */
#define MBX_STOP_IOCB 4 /* Stop iocb processing till mbox cmds
complete */
#define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per
ring */
#define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */
struct lpfc_sli_ring;
struct lpfc_sli_ring_mask {
uint8_t profile; /* profile associated with ring */
uint8_t rctl; /* rctl / type pair configured for ring */
uint8_t type; /* rctl / type pair configured for ring */
uint8_t rsvd;
/* rcv'd unsol event */
void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
struct lpfc_sli_ring *,
struct lpfc_iocbq *);
};
/* Structure used to hold SLI statistical counters and info */
struct lpfc_sli_ring_stat {
uint64_t iocb_event; /* IOCB event counters */
uint64_t iocb_cmd; /* IOCB cmd issued */
uint64_t iocb_rsp; /* IOCB rsp received */
uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
uint64_t iocb_cmd_full; /* IOCB cmd ring full */
uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
uint64_t iocb_rsp_full; /* IOCB rsp ring full */
};
/* Structure used to hold SLI ring information */
struct lpfc_sli_ring {
uint16_t flag; /* ring flags */
#define LPFC_DEFERRED_RING_EVENT 0x001 /* Deferred processing a ring event */
#define LPFC_CALL_RING_AVAILABLE 0x002 /* indicates cmd was full */
#define LPFC_STOP_IOCB_MBX 0x010 /* Stop processing IOCB cmds mbox */
#define LPFC_STOP_IOCB_EVENT 0x020 /* Stop processing IOCB cmds event */
#define LPFC_STOP_IOCB_MASK 0x030 /* Stop processing IOCB cmds mask */
uint16_t abtsiotag; /* tracks next iotag to use for ABTS */
uint32_t local_getidx; /* last available cmd index (from cmdGetInx) */
uint32_t next_cmdidx; /* next_cmd index */
uint32_t rspidx; /* current index in response ring */
uint32_t cmdidx; /* current index in command ring */
uint8_t rsvd;
uint8_t ringno; /* ring number */
uint16_t numCiocb; /* number of command iocb's per ring */
uint16_t numRiocb; /* number of rsp iocb's per ring */
uint32_t fast_iotag; /* max fastlookup based iotag */
uint32_t iotag_ctr; /* keeps track of the next iotag to use */
uint32_t iotag_max; /* max iotag value to use */
struct list_head txq;
uint16_t txq_cnt; /* current length of queue */
uint16_t txq_max; /* max length */
struct list_head txcmplq;
uint16_t txcmplq_cnt; /* current length of queue */
uint16_t txcmplq_max; /* max length */
uint32_t *cmdringaddr; /* virtual address for cmd rings */
uint32_t *rspringaddr; /* virtual address for rsp rings */
uint32_t missbufcnt; /* keep track of buffers to post */
struct list_head postbufq;
uint16_t postbufq_cnt; /* current length of queue */
uint16_t postbufq_max; /* max length */
struct list_head iocb_continueq;
uint16_t iocb_continueq_cnt; /* current length of queue */
uint16_t iocb_continueq_max; /* max length */
struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
uint32_t num_mask; /* number of mask entries in prt array */
struct lpfc_sli_ring_stat stats; /* SLI statistical info */
/* cmd ring available */
void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
struct lpfc_sli_ring *);
};
/* Structure used to hold SLI statistical counters and info */
struct lpfc_sli_stat {
uint64_t mbox_stat_err; /* Mbox cmds completed status error */
uint64_t mbox_cmd; /* Mailbox commands issued */
uint64_t sli_intr; /* Count of Host Attention interrupts */
uint32_t err_attn_event; /* Error Attn event counters */
uint32_t link_event; /* Link event counters */
uint32_t mbox_event; /* Mailbox event counters */
uint32_t mbox_busy; /* Mailbox cmd busy */
};
/* Structure used to hold SLI information */
struct lpfc_sli {
uint32_t num_rings;
uint32_t sli_flag;
/* Additional sli_flags */
#define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */
#define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */
#define LPFC_PROCESS_LA 0x400 /* Able to process link attention */
struct lpfc_sli_ring ring[LPFC_MAX_RING];
int fcp_ring; /* ring used for FCP initiator commands */
int next_ring;
int ip_ring; /* ring used for IP network drv cmds */
struct lpfc_sli_stat slistat; /* SLI statistical info */
struct list_head mboxq;
uint16_t mboxq_cnt; /* current length of queue */
uint16_t mboxq_max; /* max length */
LPFC_MBOXQ_t *mbox_active; /* active mboxq information */
struct timer_list mbox_tmo; /* Hold clk to timeout active mbox
cmd */
#define LPFC_IOCBQ_LOOKUP_INCREMENT 1024
struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
size_t iocbq_lookup_len; /* current lengs of the array */
uint16_t last_iotag; /* last allocated IOTAG */
};
/* Given a pointer to the start of the ring, and the slot number of
* the desired iocb entry, calc a pointer to that entry.
* (assume iocb entry size is 32 bytes, or 8 words)
*/
#define IOCB_ENTRY(ring,slot) ((IOCB_t *)(((char *)(ring)) + ((slot) * 32)))
#define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox
command */
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