1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2007 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 #define LPFC_DRIVER_ABORTED 8 /* driver aborted this request */ 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 *wait_queue; 55 struct lpfc_iocbq *rsp_iocb; 56 struct lpfcMboxq *mbox; 57 } context_un; 58 59 void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *, 60 struct lpfc_iocbq *); 61 62 }; 63 64 #define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */ 65 66 #define IOCB_SUCCESS 0 67 #define IOCB_BUSY 1 68 #define IOCB_ERROR 2 69 #define IOCB_TIMEDOUT 3 70 71 #define LPFC_MBX_WAKE 1 72 73 typedef 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 uint8_t mbox_flag; 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 uint32_t rspidx; /* current index in response ring */ 133 uint32_t cmdidx; /* current index in command ring */ 134 uint8_t rsvd; 135 uint8_t ringno; /* ring number */ 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 list_head txq; 143 uint16_t txq_cnt; /* current length of queue */ 144 uint16_t txq_max; /* max length */ 145 struct list_head txcmplq; 146 uint16_t txcmplq_cnt; /* current length of queue */ 147 uint16_t txcmplq_max; /* max length */ 148 uint32_t *cmdringaddr; /* virtual address for cmd rings */ 149 uint32_t *rspringaddr; /* virtual address for rsp rings */ 150 uint32_t missbufcnt; /* keep track of buffers to post */ 151 struct list_head postbufq; 152 uint16_t postbufq_cnt; /* current length of queue */ 153 uint16_t postbufq_max; /* max length */ 154 struct list_head iocb_continueq; 155 uint16_t iocb_continueq_cnt; /* current length of queue */ 156 uint16_t iocb_continueq_max; /* max length */ 157 158 struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK]; 159 uint32_t num_mask; /* number of mask entries in prt array */ 160 161 struct lpfc_sli_ring_stat stats; /* SLI statistical info */ 162 163 /* cmd ring available */ 164 void (*lpfc_sli_cmd_available) (struct lpfc_hba *, 165 struct lpfc_sli_ring *); 166 }; 167 168 /* Structure used to hold SLI statistical counters and info */ 169 struct lpfc_sli_stat { 170 uint64_t mbox_stat_err; /* Mbox cmds completed status error */ 171 uint64_t mbox_cmd; /* Mailbox commands issued */ 172 uint64_t sli_intr; /* Count of Host Attention interrupts */ 173 uint32_t err_attn_event; /* Error Attn event counters */ 174 uint32_t link_event; /* Link event counters */ 175 uint32_t mbox_event; /* Mailbox event counters */ 176 uint32_t mbox_busy; /* Mailbox cmd busy */ 177 }; 178 179 /* Structure to store link status values when port stats are reset */ 180 struct lpfc_lnk_stat { 181 uint32_t link_failure_count; 182 uint32_t loss_of_sync_count; 183 uint32_t loss_of_signal_count; 184 uint32_t prim_seq_protocol_err_count; 185 uint32_t invalid_tx_word_count; 186 uint32_t invalid_crc_count; 187 uint32_t error_frames; 188 uint32_t link_events; 189 }; 190 191 /* Structure used to hold SLI information */ 192 struct lpfc_sli { 193 uint32_t num_rings; 194 uint32_t sli_flag; 195 196 /* Additional sli_flags */ 197 #define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */ 198 #define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */ 199 #define LPFC_PROCESS_LA 0x400 /* Able to process link attention */ 200 201 struct lpfc_sli_ring ring[LPFC_MAX_RING]; 202 int fcp_ring; /* ring used for FCP initiator commands */ 203 int next_ring; 204 205 int extra_ring; /* extra ring used for other protocols */ 206 207 struct lpfc_sli_stat slistat; /* SLI statistical info */ 208 struct list_head mboxq; 209 uint16_t mboxq_cnt; /* current length of queue */ 210 uint16_t mboxq_max; /* max length */ 211 LPFC_MBOXQ_t *mbox_active; /* active mboxq information */ 212 213 struct timer_list mbox_tmo; /* Hold clk to timeout active mbox 214 cmd */ 215 216 #define LPFC_IOCBQ_LOOKUP_INCREMENT 1024 217 struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */ 218 size_t iocbq_lookup_len; /* current lengs of the array */ 219 uint16_t last_iotag; /* last allocated IOTAG */ 220 unsigned long stats_start; /* in seconds */ 221 struct lpfc_lnk_stat lnk_stat_offsets; 222 }; 223 224 /* Given a pointer to the start of the ring, and the slot number of 225 * the desired iocb entry, calc a pointer to that entry. 226 * (assume iocb entry size is 32 bytes, or 8 words) 227 */ 228 #define IOCB_ENTRY(ring,slot) ((IOCB_t *)(((char *)(ring)) + ((slot) * 32))) 229 230 #define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox 231 command */ 232 #define LPFC_MBOX_TMO_FLASH_CMD 300 /* Sec tmo for outstanding FLASH write 233 * or erase cmds. This is especially 234 * long because of the potential of 235 * multiple flash erases that can be 236 * spawned. 237 */ 238