/******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Fibre Channel Host Bus Adapters. * * Copyright (C) 2004-2005 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 SLI_IOCB_HIGH_PRIORITY 2 /* High priority command */ #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 lpfc_iocbq ** fast_lookup; /* array of IOCB ptrs indexed by iotag */ 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 */ uint32_t *MBhostaddr; /* virtual address for mbox cmds */ #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 */