1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2006 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 */ 22 struct lpfc_hba; 23 24 /* Define the context types that SLI handles for abort and sums. */ 25 typedef 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 */ 33 struct 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_LIBDFC 1 /* libdfc iocb */ 43 #define LPFC_IO_WAKE 2 /* High Priority Queue signal flag */ 44 #define LPFC_IO_FCP 4 /* FCP command -- iocbq in scsi_buf */ 45 46 uint8_t abort_count; 47 uint8_t rsvd2; 48 uint32_t drvrTimeout; /* driver timeout in seconds */ 49 void *context1; /* caller context information */ 50 void *context2; /* caller context information */ 51 void *context3; /* caller context information */ 52 union { 53 wait_queue_head_t *wait_queue; 54 struct lpfc_iocbq *rsp_iocb; 55 struct lpfcMboxq *mbox; 56 } context_un; 57 58 void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *, 59 struct lpfc_iocbq *); 60 61 }; 62 63 #define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */ 64 65 #define IOCB_SUCCESS 0 66 #define IOCB_BUSY 1 67 #define IOCB_ERROR 2 68 #define IOCB_TIMEDOUT 3 69 70 typedef struct lpfcMboxq { 71 /* MBOXQs are used in single linked lists */ 72 struct list_head list; /* ptr to next mailbox command */ 73 MAILBOX_t mb; /* Mailbox cmd */ 74 void *context1; /* caller context information */ 75 void *context2; /* caller context information */ 76 77 void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *); 78 79 } LPFC_MBOXQ_t; 80 81 #define MBX_POLL 1 /* poll mailbox till command done, then 82 return */ 83 #define MBX_NOWAIT 2 /* issue command then return immediately */ 84 #define MBX_STOP_IOCB 4 /* Stop iocb processing till mbox cmds 85 complete */ 86 87 #define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per 88 ring */ 89 #define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */ 90 91 struct lpfc_sli_ring; 92 93 struct lpfc_sli_ring_mask { 94 uint8_t profile; /* profile associated with ring */ 95 uint8_t rctl; /* rctl / type pair configured for ring */ 96 uint8_t type; /* rctl / type pair configured for ring */ 97 uint8_t rsvd; 98 /* rcv'd unsol event */ 99 void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *, 100 struct lpfc_sli_ring *, 101 struct lpfc_iocbq *); 102 }; 103 104 105 /* Structure used to hold SLI statistical counters and info */ 106 struct lpfc_sli_ring_stat { 107 uint64_t iocb_event; /* IOCB event counters */ 108 uint64_t iocb_cmd; /* IOCB cmd issued */ 109 uint64_t iocb_rsp; /* IOCB rsp received */ 110 uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */ 111 uint64_t iocb_cmd_full; /* IOCB cmd ring full */ 112 uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */ 113 uint64_t iocb_rsp_full; /* IOCB rsp ring full */ 114 }; 115 116 /* Structure used to hold SLI ring information */ 117 struct lpfc_sli_ring { 118 uint16_t flag; /* ring flags */ 119 #define LPFC_DEFERRED_RING_EVENT 0x001 /* Deferred processing a ring event */ 120 #define LPFC_CALL_RING_AVAILABLE 0x002 /* indicates cmd was full */ 121 #define LPFC_STOP_IOCB_MBX 0x010 /* Stop processing IOCB cmds mbox */ 122 #define LPFC_STOP_IOCB_EVENT 0x020 /* Stop processing IOCB cmds event */ 123 #define LPFC_STOP_IOCB_MASK 0x030 /* Stop processing IOCB cmds mask */ 124 uint16_t abtsiotag; /* tracks next iotag to use for ABTS */ 125 126 uint32_t local_getidx; /* last available cmd index (from cmdGetInx) */ 127 uint32_t next_cmdidx; /* next_cmd index */ 128 uint32_t rspidx; /* current index in response ring */ 129 uint32_t cmdidx; /* current index in command ring */ 130 uint8_t rsvd; 131 uint8_t ringno; /* ring number */ 132 uint16_t numCiocb; /* number of command iocb's per ring */ 133 uint16_t numRiocb; /* number of rsp iocb's per ring */ 134 135 uint32_t fast_iotag; /* max fastlookup based iotag */ 136 uint32_t iotag_ctr; /* keeps track of the next iotag to use */ 137 uint32_t iotag_max; /* max iotag value to use */ 138 struct list_head txq; 139 uint16_t txq_cnt; /* current length of queue */ 140 uint16_t txq_max; /* max length */ 141 struct list_head txcmplq; 142 uint16_t txcmplq_cnt; /* current length of queue */ 143 uint16_t txcmplq_max; /* max length */ 144 uint32_t *cmdringaddr; /* virtual address for cmd rings */ 145 uint32_t *rspringaddr; /* virtual address for rsp rings */ 146 uint32_t missbufcnt; /* keep track of buffers to post */ 147 struct list_head postbufq; 148 uint16_t postbufq_cnt; /* current length of queue */ 149 uint16_t postbufq_max; /* max length */ 150 struct list_head iocb_continueq; 151 uint16_t iocb_continueq_cnt; /* current length of queue */ 152 uint16_t iocb_continueq_max; /* max length */ 153 154 struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK]; 155 uint32_t num_mask; /* number of mask entries in prt array */ 156 157 struct lpfc_sli_ring_stat stats; /* SLI statistical info */ 158 159 /* cmd ring available */ 160 void (*lpfc_sli_cmd_available) (struct lpfc_hba *, 161 struct lpfc_sli_ring *); 162 }; 163 164 /* Structure used to hold SLI statistical counters and info */ 165 struct lpfc_sli_stat { 166 uint64_t mbox_stat_err; /* Mbox cmds completed status error */ 167 uint64_t mbox_cmd; /* Mailbox commands issued */ 168 uint64_t sli_intr; /* Count of Host Attention interrupts */ 169 uint32_t err_attn_event; /* Error Attn event counters */ 170 uint32_t link_event; /* Link event counters */ 171 uint32_t mbox_event; /* Mailbox event counters */ 172 uint32_t mbox_busy; /* Mailbox cmd busy */ 173 }; 174 175 /* Structure used to hold SLI information */ 176 struct lpfc_sli { 177 uint32_t num_rings; 178 uint32_t sli_flag; 179 180 /* Additional sli_flags */ 181 #define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */ 182 #define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */ 183 #define LPFC_PROCESS_LA 0x400 /* Able to process link attention */ 184 185 struct lpfc_sli_ring ring[LPFC_MAX_RING]; 186 int fcp_ring; /* ring used for FCP initiator commands */ 187 int next_ring; 188 189 int ip_ring; /* ring used for IP network drv cmds */ 190 191 struct lpfc_sli_stat slistat; /* SLI statistical info */ 192 struct list_head mboxq; 193 uint16_t mboxq_cnt; /* current length of queue */ 194 uint16_t mboxq_max; /* max length */ 195 LPFC_MBOXQ_t *mbox_active; /* active mboxq information */ 196 197 struct timer_list mbox_tmo; /* Hold clk to timeout active mbox 198 cmd */ 199 200 #define LPFC_IOCBQ_LOOKUP_INCREMENT 1024 201 struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */ 202 size_t iocbq_lookup_len; /* current lengs of the array */ 203 uint16_t last_iotag; /* last allocated IOTAG */ 204 }; 205 206 /* Given a pointer to the start of the ring, and the slot number of 207 * the desired iocb entry, calc a pointer to that entry. 208 * (assume iocb entry size is 32 bytes, or 8 words) 209 */ 210 #define IOCB_ENTRY(ring,slot) ((IOCB_t *)(((char *)(ring)) + ((slot) * 32))) 211 212 #define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox 213 command */ 214