lpfc_sli.h revision 604a3e3042eb89ffaa4f735ef9208281aae786c7
1/******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2005 Emulex. All rights reserved. * 5 * EMULEX and SLI are trademarks of Emulex. * 6 * www.emulex.com * 7 * * 8 * This program is free software; you can redistribute it and/or * 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. * 19 *******************************************************************/ 20 21/* forward declaration for LPFC_IOCB_t's use */ 22struct lpfc_hba; 23 24/* Define the context types that SLI handles for abort and sums. */ 25typedef enum _lpfc_ctx_cmd { 26 LPFC_CTX_LUN, 27 LPFC_CTX_TGT, 28 LPFC_CTX_CTX, 29 LPFC_CTX_HOST 30} lpfc_ctx_cmd; 31 32/* This structure is used to handle IOCB requests / responses */ 33struct lpfc_iocbq { 34 /* lpfc_iocbqs are used in double linked lists */ 35 struct list_head list; 36 uint16_t iotag; /* pre-assigned IO tag */ 37 uint16_t rsvd1; 38 39 IOCB_t iocb; /* IOCB cmd */ 40 uint8_t retry; /* retry counter for IOCB cmd - if needed */ 41 uint8_t iocb_flag; 42#define LPFC_IO_POLL 1 /* Polling mode iocb */ 43#define LPFC_IO_LIBDFC 2 /* libdfc iocb */ 44#define LPFC_IO_WAIT 4 45#define LPFC_IO_HIPRI 8 /* High Priority Queue signal flag */ 46 47 uint8_t abort_count; 48 uint8_t rsvd2; 49 uint32_t drvrTimeout; /* driver timeout in seconds */ 50 void *context1; /* caller context information */ 51 void *context2; /* caller context information */ 52 void *context3; /* caller context information */ 53 union { 54 wait_queue_head_t *hipri_wait_queue; /* High Priority Queue wait 55 queue */ 56 struct lpfc_iocbq *rsp_iocb; 57 struct lpfcMboxq *mbox; 58 } context_un; 59 60 void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *, 61 struct lpfc_iocbq *); 62 63}; 64 65#define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */ 66#define SLI_IOCB_HIGH_PRIORITY 2 /* High priority command */ 67 68#define IOCB_SUCCESS 0 69#define IOCB_BUSY 1 70#define IOCB_ERROR 2 71#define IOCB_TIMEDOUT 3 72 73typedef struct lpfcMboxq { 74 /* MBOXQs are used in single linked lists */ 75 struct list_head list; /* ptr to next mailbox command */ 76 MAILBOX_t mb; /* Mailbox cmd */ 77 void *context1; /* caller context information */ 78 void *context2; /* caller context information */ 79 80 void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *); 81 82} LPFC_MBOXQ_t; 83 84#define MBX_POLL 1 /* poll mailbox till command done, then 85 return */ 86#define MBX_NOWAIT 2 /* issue command then return immediately */ 87#define MBX_STOP_IOCB 4 /* Stop iocb processing till mbox cmds 88 complete */ 89 90#define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per 91 ring */ 92#define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */ 93 94struct lpfc_sli_ring; 95 96struct lpfc_sli_ring_mask { 97 uint8_t profile; /* profile associated with ring */ 98 uint8_t rctl; /* rctl / type pair configured for ring */ 99 uint8_t type; /* rctl / type pair configured for ring */ 100 uint8_t rsvd; 101 /* rcv'd unsol event */ 102 void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *, 103 struct lpfc_sli_ring *, 104 struct lpfc_iocbq *); 105}; 106 107 108/* Structure used to hold SLI statistical counters and info */ 109struct lpfc_sli_ring_stat { 110 uint64_t iocb_event; /* IOCB event counters */ 111 uint64_t iocb_cmd; /* IOCB cmd issued */ 112 uint64_t iocb_rsp; /* IOCB rsp received */ 113 uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */ 114 uint64_t iocb_cmd_full; /* IOCB cmd ring full */ 115 uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */ 116 uint64_t iocb_rsp_full; /* IOCB rsp ring full */ 117}; 118 119/* Structure used to hold SLI ring information */ 120struct lpfc_sli_ring { 121 uint16_t flag; /* ring flags */ 122#define LPFC_DEFERRED_RING_EVENT 0x001 /* Deferred processing a ring event */ 123#define LPFC_CALL_RING_AVAILABLE 0x002 /* indicates cmd was full */ 124#define LPFC_STOP_IOCB_MBX 0x010 /* Stop processing IOCB cmds mbox */ 125#define LPFC_STOP_IOCB_EVENT 0x020 /* Stop processing IOCB cmds event */ 126#define LPFC_STOP_IOCB_MASK 0x030 /* Stop processing IOCB cmds mask */ 127 uint16_t abtsiotag; /* tracks next iotag to use for ABTS */ 128 129 uint32_t local_getidx; /* last available cmd index (from cmdGetInx) */ 130 uint32_t next_cmdidx; /* next_cmd index */ 131 uint32_t rspidx; /* current index in response ring */ 132 uint32_t cmdidx; /* current index in command ring */ 133 uint8_t rsvd; 134 uint8_t ringno; /* ring number */ 135 uint16_t numCiocb; /* number of command iocb's per ring */ 136 uint16_t numRiocb; /* number of rsp iocb's per ring */ 137 138 uint32_t fast_iotag; /* max fastlookup based iotag */ 139 uint32_t iotag_ctr; /* keeps track of the next iotag to use */ 140 uint32_t iotag_max; /* max iotag value to use */ 141 struct lpfc_iocbq ** fast_lookup; /* array of IOCB ptrs indexed by 142 iotag */ 143 struct list_head txq; 144 uint16_t txq_cnt; /* current length of queue */ 145 uint16_t txq_max; /* max length */ 146 struct list_head txcmplq; 147 uint16_t txcmplq_cnt; /* current length of queue */ 148 uint16_t txcmplq_max; /* max length */ 149 uint32_t *cmdringaddr; /* virtual address for cmd rings */ 150 uint32_t *rspringaddr; /* virtual address for rsp rings */ 151 uint32_t missbufcnt; /* keep track of buffers to post */ 152 struct list_head postbufq; 153 uint16_t postbufq_cnt; /* current length of queue */ 154 uint16_t postbufq_max; /* max length */ 155 struct list_head iocb_continueq; 156 uint16_t iocb_continueq_cnt; /* current length of queue */ 157 uint16_t iocb_continueq_max; /* max length */ 158 159 struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK]; 160 uint32_t num_mask; /* number of mask entries in prt array */ 161 162 struct lpfc_sli_ring_stat stats; /* SLI statistical info */ 163 164 /* cmd ring available */ 165 void (*lpfc_sli_cmd_available) (struct lpfc_hba *, 166 struct lpfc_sli_ring *); 167}; 168 169/* Structure used to hold SLI statistical counters and info */ 170struct lpfc_sli_stat { 171 uint64_t mbox_stat_err; /* Mbox cmds completed status error */ 172 uint64_t mbox_cmd; /* Mailbox commands issued */ 173 uint64_t sli_intr; /* Count of Host Attention interrupts */ 174 uint32_t err_attn_event; /* Error Attn event counters */ 175 uint32_t link_event; /* Link event counters */ 176 uint32_t mbox_event; /* Mailbox event counters */ 177 uint32_t mbox_busy; /* Mailbox cmd busy */ 178}; 179 180/* Structure used to hold SLI information */ 181struct lpfc_sli { 182 uint32_t num_rings; 183 uint32_t sli_flag; 184 185 /* Additional sli_flags */ 186#define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */ 187#define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */ 188#define LPFC_PROCESS_LA 0x400 /* Able to process link attention */ 189 190 struct lpfc_sli_ring ring[LPFC_MAX_RING]; 191 int fcp_ring; /* ring used for FCP initiator commands */ 192 int next_ring; 193 194 int ip_ring; /* ring used for IP network drv cmds */ 195 196 struct lpfc_sli_stat slistat; /* SLI statistical info */ 197 struct list_head mboxq; 198 uint16_t mboxq_cnt; /* current length of queue */ 199 uint16_t mboxq_max; /* max length */ 200 LPFC_MBOXQ_t *mbox_active; /* active mboxq information */ 201 202 struct timer_list mbox_tmo; /* Hold clk to timeout active mbox 203 cmd */ 204 205 uint32_t *MBhostaddr; /* virtual address for mbox cmds */ 206 207#define LPFC_IOCBQ_LOOKUP_INCREMENT 1024 208 struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */ 209 size_t iocbq_lookup_len; /* current lengs of the array */ 210 uint16_t last_iotag; /* last allocated IOTAG */ 211}; 212 213/* Given a pointer to the start of the ring, and the slot number of 214 * the desired iocb entry, calc a pointer to that entry. 215 * (assume iocb entry size is 32 bytes, or 8 words) 216 */ 217#define IOCB_ENTRY(ring,slot) ((IOCB_t *)(((char *)(ring)) + ((slot) * 32))) 218 219#define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox 220 command */ 221