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. *
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 *******************************************************************/
21 /* forward declaration for LPFC_IOCB_t's use */
24 /* Define the context types that SLI handles for abort and sums. */
25 typedef enum _lpfc_ctx_cmd
{
32 /* This structure is used to handle IOCB requests / responses */
34 /* lpfc_iocbqs are used in double linked lists */
35 struct list_head list
;
36 uint16_t iotag
; /* pre-assigned IO tag */
39 IOCB_t iocb
; /* IOCB cmd */
40 uint8_t retry
; /* retry counter for IOCB cmd - if needed */
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 */
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 */
54 wait_queue_head_t
*wait_queue
;
55 struct lpfc_iocbq
*rsp_iocb
;
56 struct lpfcMboxq
*mbox
;
59 void (*iocb_cmpl
) (struct lpfc_hba
*, struct lpfc_iocbq
*,
64 #define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */
66 #define IOCB_SUCCESS 0
69 #define IOCB_TIMEDOUT 3
71 #define LPFC_MBX_WAKE 1
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 */
80 void (*mbox_cmpl
) (struct lpfc_hba
*, struct lpfcMboxq
*);
85 #define MBX_POLL 1 /* poll mailbox till command done, then
87 #define MBX_NOWAIT 2 /* issue command then return immediately */
88 #define MBX_STOP_IOCB 4 /* Stop iocb processing till mbox cmds
91 #define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per
93 #define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */
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 */
102 /* rcv'd unsol event */
103 void (*lpfc_sli_rcv_unsol_event
) (struct lpfc_hba
*,
104 struct lpfc_sli_ring
*,
105 struct lpfc_iocbq
*);
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 */
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 */
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 */
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 */
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 */
158 struct lpfc_sli_ring_mask prt
[LPFC_MAX_RING_MASK
];
159 uint32_t num_mask
; /* number of mask entries in prt array */
161 struct lpfc_sli_ring_stat stats
; /* SLI statistical info */
163 /* cmd ring available */
164 void (*lpfc_sli_cmd_available
) (struct lpfc_hba
*,
165 struct lpfc_sli_ring
*);
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 */
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
;
191 /* Structure used to hold SLI information */
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 */
201 struct lpfc_sli_ring ring
[LPFC_MAX_RING
];
202 int fcp_ring
; /* ring used for FCP initiator commands */
205 int extra_ring
; /* extra ring used for other protocols */
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 */
213 struct timer_list mbox_tmo
; /* Hold clk to timeout active mbox
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
;
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)
228 #define IOCB_ENTRY(ring,slot) ((IOCB_t *)(((char *)(ring)) + ((slot) * 32)))
230 #define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox
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