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. *
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 */
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 */
53 wait_queue_head_t
*wait_queue
;
54 struct lpfc_iocbq
*rsp_iocb
;
55 struct lpfcMboxq
*mbox
;
58 void (*iocb_cmpl
) (struct lpfc_hba
*, struct lpfc_iocbq
*,
63 #define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */
64 #define SLI_IOCB_HIGH_PRIORITY 2 /* High priority command */
66 #define IOCB_SUCCESS 0
69 #define IOCB_TIMEDOUT 3
71 typedef struct lpfcMboxq
{
72 /* MBOXQs are used in single linked lists */
73 struct list_head list
; /* ptr to next mailbox command */
74 MAILBOX_t mb
; /* Mailbox cmd */
75 void *context1
; /* caller context information */
76 void *context2
; /* caller context information */
78 void (*mbox_cmpl
) (struct lpfc_hba
*, struct lpfcMboxq
*);
82 #define MBX_POLL 1 /* poll mailbox till command done, then
84 #define MBX_NOWAIT 2 /* issue command then return immediately */
85 #define MBX_STOP_IOCB 4 /* Stop iocb processing till mbox cmds
88 #define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per
90 #define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */
94 struct lpfc_sli_ring_mask
{
95 uint8_t profile
; /* profile associated with ring */
96 uint8_t rctl
; /* rctl / type pair configured for ring */
97 uint8_t type
; /* rctl / type pair configured for ring */
99 /* rcv'd unsol event */
100 void (*lpfc_sli_rcv_unsol_event
) (struct lpfc_hba
*,
101 struct lpfc_sli_ring
*,
102 struct lpfc_iocbq
*);
106 /* Structure used to hold SLI statistical counters and info */
107 struct lpfc_sli_ring_stat
{
108 uint64_t iocb_event
; /* IOCB event counters */
109 uint64_t iocb_cmd
; /* IOCB cmd issued */
110 uint64_t iocb_rsp
; /* IOCB rsp received */
111 uint64_t iocb_cmd_delay
; /* IOCB cmd ring delay */
112 uint64_t iocb_cmd_full
; /* IOCB cmd ring full */
113 uint64_t iocb_cmd_empty
; /* IOCB cmd ring is now empty */
114 uint64_t iocb_rsp_full
; /* IOCB rsp ring full */
117 /* Structure used to hold SLI ring information */
118 struct lpfc_sli_ring
{
119 uint16_t flag
; /* ring flags */
120 #define LPFC_DEFERRED_RING_EVENT 0x001 /* Deferred processing a ring event */
121 #define LPFC_CALL_RING_AVAILABLE 0x002 /* indicates cmd was full */
122 #define LPFC_STOP_IOCB_MBX 0x010 /* Stop processing IOCB cmds mbox */
123 #define LPFC_STOP_IOCB_EVENT 0x020 /* Stop processing IOCB cmds event */
124 #define LPFC_STOP_IOCB_MASK 0x030 /* Stop processing IOCB cmds mask */
125 uint16_t abtsiotag
; /* tracks next iotag to use for ABTS */
127 uint32_t local_getidx
; /* last available cmd index (from cmdGetInx) */
128 uint32_t next_cmdidx
; /* next_cmd index */
129 uint32_t rspidx
; /* current index in response ring */
130 uint32_t cmdidx
; /* current index in command ring */
132 uint8_t ringno
; /* ring number */
133 uint16_t numCiocb
; /* number of command iocb's per ring */
134 uint16_t numRiocb
; /* number of rsp iocb's per ring */
136 uint32_t fast_iotag
; /* max fastlookup based iotag */
137 uint32_t iotag_ctr
; /* keeps track of the next iotag to use */
138 uint32_t iotag_max
; /* max iotag value to use */
139 struct lpfc_iocbq
** fast_lookup
; /* array of IOCB ptrs indexed by
141 struct list_head txq
;
142 uint16_t txq_cnt
; /* current length of queue */
143 uint16_t txq_max
; /* max length */
144 struct list_head txcmplq
;
145 uint16_t txcmplq_cnt
; /* current length of queue */
146 uint16_t txcmplq_max
; /* max length */
147 uint32_t *cmdringaddr
; /* virtual address for cmd rings */
148 uint32_t *rspringaddr
; /* virtual address for rsp rings */
149 uint32_t missbufcnt
; /* keep track of buffers to post */
150 struct list_head postbufq
;
151 uint16_t postbufq_cnt
; /* current length of queue */
152 uint16_t postbufq_max
; /* max length */
153 struct list_head iocb_continueq
;
154 uint16_t iocb_continueq_cnt
; /* current length of queue */
155 uint16_t iocb_continueq_max
; /* max length */
157 struct lpfc_sli_ring_mask prt
[LPFC_MAX_RING_MASK
];
158 uint32_t num_mask
; /* number of mask entries in prt array */
160 struct lpfc_sli_ring_stat stats
; /* SLI statistical info */
162 /* cmd ring available */
163 void (*lpfc_sli_cmd_available
) (struct lpfc_hba
*,
164 struct lpfc_sli_ring
*);
167 /* Structure used to hold SLI statistical counters and info */
168 struct lpfc_sli_stat
{
169 uint64_t mbox_stat_err
; /* Mbox cmds completed status error */
170 uint64_t mbox_cmd
; /* Mailbox commands issued */
171 uint64_t sli_intr
; /* Count of Host Attention interrupts */
172 uint32_t err_attn_event
; /* Error Attn event counters */
173 uint32_t link_event
; /* Link event counters */
174 uint32_t mbox_event
; /* Mailbox event counters */
175 uint32_t mbox_busy
; /* Mailbox cmd busy */
178 /* Structure used to hold SLI information */
183 /* Additional sli_flags */
184 #define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */
185 #define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */
186 #define LPFC_PROCESS_LA 0x400 /* Able to process link attention */
188 struct lpfc_sli_ring ring
[LPFC_MAX_RING
];
189 int fcp_ring
; /* ring used for FCP initiator commands */
192 int ip_ring
; /* ring used for IP network drv cmds */
194 struct lpfc_sli_stat slistat
; /* SLI statistical info */
195 struct list_head mboxq
;
196 uint16_t mboxq_cnt
; /* current length of queue */
197 uint16_t mboxq_max
; /* max length */
198 LPFC_MBOXQ_t
*mbox_active
; /* active mboxq information */
200 struct timer_list mbox_tmo
; /* Hold clk to timeout active mbox
203 uint32_t *MBhostaddr
; /* virtual address for mbox cmds */
205 #define LPFC_IOCBQ_LOOKUP_INCREMENT 1024
206 struct lpfc_iocbq
** iocbq_lookup
; /* array to lookup IOCB by IOTAG */
207 size_t iocbq_lookup_len
; /* current lengs of the array */
208 uint16_t last_iotag
; /* last allocated IOTAG */
211 /* Given a pointer to the start of the ring, and the slot number of
212 * the desired iocb entry, calc a pointer to that entry.
213 * (assume iocb entry size is 32 bytes, or 8 words)
215 #define IOCB_ENTRY(ring,slot) ((IOCB_t *)(((char *)(ring)) + ((slot) * 32)))
217 #define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox