1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Enterprise Fibre Channel Host Bus Adapters. * 4 * Refer to the README file included with this package for * 5 * driver version and adapter support. * 6 * Copyright (C) 2004 Emulex Corporation. * 7 * www.emulex.com * 8 * * 9 * This program is free software; you can redistribute it and/or * 10 * modify it under the terms of the GNU General Public License * 11 * as published by the Free Software Foundation; either version 2 * 12 * of the License, or (at your option) any later version. * 13 * * 14 * This program is distributed in the hope that it will be useful, * 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 17 * GNU General Public License for more details, a copy of which * 18 * can be found in the file COPYING included with this package. * 19 *******************************************************************/ 20 21 /* 22 * $Id: lpfc_sli.h 1.42 2005/03/21 02:01:28EST sf_support Exp $ 23 */ 24 25 /* forward declaration for LPFC_IOCB_t's use */ 26 struct lpfc_hba; 27 28 /* Define the context types that SLI handles for abort and sums. */ 29 typedef enum _lpfc_ctx_cmd { 30 LPFC_CTX_LUN, 31 LPFC_CTX_TGT, 32 LPFC_CTX_CTX, 33 LPFC_CTX_HOST 34 } lpfc_ctx_cmd; 35 36 /* This structure is used to handle IOCB requests / responses */ 37 struct lpfc_iocbq { 38 /* lpfc_iocbqs are used in double linked lists */ 39 struct list_head list; 40 IOCB_t iocb; /* IOCB cmd */ 41 uint8_t retry; /* retry counter for IOCB cmd - if needed */ 42 uint8_t iocb_flag; 43 #define LPFC_IO_POLL 1 /* Polling mode iocb */ 44 #define LPFC_IO_LIBDFC 2 /* libdfc iocb */ 45 #define LPFC_IO_WAIT 4 46 #define LPFC_IO_HIPRI 8 /* High Priority Queue signal flag */ 47 48 uint8_t abort_count; 49 uint8_t rsvd2; 50 uint32_t drvrTimeout; /* driver timeout in seconds */ 51 void *context1; /* caller context information */ 52 void *context2; /* caller context information */ 53 void *context3; /* caller context information */ 54 union { 55 wait_queue_head_t *hipri_wait_queue; /* High Priority Queue wait 56 queue */ 57 struct lpfc_iocbq *rsp_iocb; 58 struct lpfcMboxq *mbox; 59 } context_un; 60 61 void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *, 62 struct lpfc_iocbq *); 63 64 }; 65 66 #define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */ 67 #define SLI_IOCB_HIGH_PRIORITY 2 /* High priority command */ 68 69 #define IOCB_SUCCESS 0 70 #define IOCB_BUSY 1 71 #define IOCB_ERROR 2 72 #define IOCB_TIMEDOUT 3 73 74 typedef struct lpfcMboxq { 75 /* MBOXQs are used in single linked lists */ 76 struct list_head list; /* ptr to next mailbox command */ 77 MAILBOX_t mb; /* Mailbox cmd */ 78 void *context1; /* caller context information */ 79 void *context2; /* caller context information */ 80 81 void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *); 82 83 } LPFC_MBOXQ_t; 84 85 #define MBX_POLL 1 /* poll mailbox till command done, then 86 return */ 87 #define MBX_NOWAIT 2 /* issue command then return immediately */ 88 #define MBX_STOP_IOCB 4 /* Stop iocb processing till mbox cmds 89 complete */ 90 91 #define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per 92 ring */ 93 #define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */ 94 95 struct lpfc_sli_ring; 96 97 struct lpfc_sli_ring_mask { 98 uint8_t profile; /* profile associated with ring */ 99 uint8_t rctl; /* rctl / type pair configured for ring */ 100 uint8_t type; /* rctl / type pair configured for ring */ 101 uint8_t rsvd; 102 /* rcv'd unsol event */ 103 void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *, 104 struct lpfc_sli_ring *, 105 struct lpfc_iocbq *); 106 }; 107 108 109 /* Structure used to hold SLI statistical counters and info */ 110 struct lpfc_sli_ring_stat { 111 uint64_t iocb_event; /* IOCB event counters */ 112 uint64_t iocb_cmd; /* IOCB cmd issued */ 113 uint64_t iocb_rsp; /* IOCB rsp received */ 114 uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */ 115 uint64_t iocb_cmd_full; /* IOCB cmd ring full */ 116 uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */ 117 uint64_t iocb_rsp_full; /* IOCB rsp ring full */ 118 }; 119 120 /* Structure used to hold SLI ring information */ 121 struct lpfc_sli_ring { 122 uint16_t flag; /* ring flags */ 123 #define LPFC_DEFERRED_RING_EVENT 0x001 /* Deferred processing a ring event */ 124 #define LPFC_CALL_RING_AVAILABLE 0x002 /* indicates cmd was full */ 125 #define LPFC_STOP_IOCB_MBX 0x010 /* Stop processing IOCB cmds mbox */ 126 #define LPFC_STOP_IOCB_EVENT 0x020 /* Stop processing IOCB cmds event */ 127 #define LPFC_STOP_IOCB_MASK 0x030 /* Stop processing IOCB cmds mask */ 128 uint16_t abtsiotag; /* tracks next iotag to use for ABTS */ 129 130 uint32_t local_getidx; /* last available cmd index (from cmdGetInx) */ 131 uint32_t next_cmdidx; /* next_cmd index */ 132 uint8_t rsvd; 133 uint8_t ringno; /* ring number */ 134 uint8_t rspidx; /* current index in response ring */ 135 uint8_t cmdidx; /* current index in command ring */ 136 uint16_t numCiocb; /* number of command iocb's per ring */ 137 uint16_t numRiocb; /* number of rsp iocb's per ring */ 138 139 uint32_t fast_iotag; /* max fastlookup based iotag */ 140 uint32_t iotag_ctr; /* keeps track of the next iotag to use */ 141 uint32_t iotag_max; /* max iotag value to use */ 142 struct lpfc_iocbq ** fast_lookup; /* array of IOCB ptrs indexed by 143 iotag */ 144 struct list_head txq; 145 uint16_t txq_cnt; /* current length of queue */ 146 uint16_t txq_max; /* max length */ 147 struct list_head txcmplq; 148 uint16_t txcmplq_cnt; /* current length of queue */ 149 uint16_t txcmplq_max; /* max length */ 150 uint32_t *cmdringaddr; /* virtual address for cmd rings */ 151 uint32_t *rspringaddr; /* virtual address for rsp rings */ 152 uint32_t missbufcnt; /* keep track of buffers to post */ 153 struct list_head postbufq; 154 uint16_t postbufq_cnt; /* current length of queue */ 155 uint16_t postbufq_max; /* max length */ 156 struct list_head iocb_continueq; 157 uint16_t iocb_continueq_cnt; /* current length of queue */ 158 uint16_t iocb_continueq_max; /* max length */ 159 160 struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK]; 161 uint32_t num_mask; /* number of mask entries in prt array */ 162 163 struct lpfc_sli_ring_stat stats; /* SLI statistical info */ 164 165 /* cmd ring available */ 166 void (*lpfc_sli_cmd_available) (struct lpfc_hba *, 167 struct lpfc_sli_ring *); 168 }; 169 170 /* Structure used to hold SLI statistical counters and info */ 171 struct lpfc_sli_stat { 172 uint64_t mbox_stat_err; /* Mbox cmds completed status error */ 173 uint64_t mbox_cmd; /* Mailbox commands issued */ 174 uint64_t sli_intr; /* Count of Host Attention interrupts */ 175 uint32_t err_attn_event; /* Error Attn event counters */ 176 uint32_t link_event; /* Link event counters */ 177 uint32_t mbox_event; /* Mailbox event counters */ 178 uint32_t mbox_busy; /* Mailbox cmd busy */ 179 }; 180 181 /* Structure used to hold SLI information */ 182 struct lpfc_sli { 183 uint32_t num_rings; 184 uint32_t sli_flag; 185 186 /* Additional sli_flags */ 187 #define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */ 188 #define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */ 189 #define LPFC_PROCESS_LA 0x400 /* Able to process link attention */ 190 191 struct lpfc_sli_ring ring[LPFC_MAX_RING]; 192 int fcp_ring; /* ring used for FCP initiator commands */ 193 int next_ring; 194 195 int ip_ring; /* ring used for IP network drv cmds */ 196 197 struct lpfc_sli_stat slistat; /* SLI statistical info */ 198 struct list_head mboxq; 199 uint16_t mboxq_cnt; /* current length of queue */ 200 uint16_t mboxq_max; /* max length */ 201 LPFC_MBOXQ_t *mbox_active; /* active mboxq information */ 202 203 struct timer_list mbox_tmo; /* Hold clk to timeout active mbox 204 cmd */ 205 206 uint32_t *MBhostaddr; /* virtual address for mbox cmds */ 207 }; 208 209 /* Given a pointer to the start of the ring, and the slot number of 210 * the desired iocb entry, calc a pointer to that entry. 211 * (assume iocb entry size is 32 bytes, or 8 words) 212 */ 213 #define IOCB_ENTRY(ring,slot) ((IOCB_t *)(((char *)(ring)) + ((slot) * 32))) 214 215 #define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox 216 command */ 217