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_POLL 1 /* Polling mode iocb */
43 #define LPFC_IO_LIBDFC 2 /* libdfc iocb */
44 #define LPFC_IO_WAIT 4
45 #define LPFC_IO_HIPRI 8 /* High Priority Queue signal flag */
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
*hipri_wait_queue
; /* High Priority Queue wait
56 struct lpfc_iocbq
*rsp_iocb
;
57 struct lpfcMboxq
*mbox
;
60 void (*iocb_cmpl
) (struct lpfc_hba
*, struct lpfc_iocbq
*,
65 #define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */
66 #define SLI_IOCB_HIGH_PRIORITY 2 /* High priority command */
68 #define IOCB_SUCCESS 0
71 #define IOCB_TIMEDOUT 3
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
*);
84 #define MBX_POLL 1 /* poll mailbox till command done, then
86 #define MBX_NOWAIT 2 /* issue command then return immediately */
87 #define MBX_STOP_IOCB 4 /* Stop iocb processing till mbox cmds
90 #define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per
92 #define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */
96 struct lpfc_sli_ring_mask
{
97 uint8_t profile
; /* profile associated with ring */
98 uint8_t rctl
; /* rctl / type pair configured for ring */
99 uint8_t type
; /* rctl / type pair configured for ring */
101 /* rcv'd unsol event */
102 void (*lpfc_sli_rcv_unsol_event
) (struct lpfc_hba
*,
103 struct lpfc_sli_ring
*,
104 struct lpfc_iocbq
*);
108 /* Structure used to hold SLI statistical counters and info */
109 struct lpfc_sli_ring_stat
{
110 uint64_t iocb_event
; /* IOCB event counters */
111 uint64_t iocb_cmd
; /* IOCB cmd issued */
112 uint64_t iocb_rsp
; /* IOCB rsp received */
113 uint64_t iocb_cmd_delay
; /* IOCB cmd ring delay */
114 uint64_t iocb_cmd_full
; /* IOCB cmd ring full */
115 uint64_t iocb_cmd_empty
; /* IOCB cmd ring is now empty */
116 uint64_t iocb_rsp_full
; /* IOCB rsp ring full */
119 /* Structure used to hold SLI ring information */
120 struct lpfc_sli_ring
{
121 uint16_t flag
; /* ring flags */
122 #define LPFC_DEFERRED_RING_EVENT 0x001 /* Deferred processing a ring event */
123 #define LPFC_CALL_RING_AVAILABLE 0x002 /* indicates cmd was full */
124 #define LPFC_STOP_IOCB_MBX 0x010 /* Stop processing IOCB cmds mbox */
125 #define LPFC_STOP_IOCB_EVENT 0x020 /* Stop processing IOCB cmds event */
126 #define LPFC_STOP_IOCB_MASK 0x030 /* Stop processing IOCB cmds mask */
127 uint16_t abtsiotag
; /* tracks next iotag to use for ABTS */
129 uint32_t local_getidx
; /* last available cmd index (from cmdGetInx) */
130 uint32_t next_cmdidx
; /* next_cmd index */
131 uint32_t rspidx
; /* current index in response ring */
132 uint32_t cmdidx
; /* current index in command ring */
134 uint8_t ringno
; /* ring number */
135 uint16_t numCiocb
; /* number of command iocb's per ring */
136 uint16_t numRiocb
; /* number of rsp iocb's per ring */
138 uint32_t fast_iotag
; /* max fastlookup based iotag */
139 uint32_t iotag_ctr
; /* keeps track of the next iotag to use */
140 uint32_t iotag_max
; /* max iotag value to use */
141 struct lpfc_iocbq
** fast_lookup
; /* array of IOCB ptrs indexed by
143 struct list_head txq
;
144 uint16_t txq_cnt
; /* current length of queue */
145 uint16_t txq_max
; /* max length */
146 struct list_head txcmplq
;
147 uint16_t txcmplq_cnt
; /* current length of queue */
148 uint16_t txcmplq_max
; /* max length */
149 uint32_t *cmdringaddr
; /* virtual address for cmd rings */
150 uint32_t *rspringaddr
; /* virtual address for rsp rings */
151 uint32_t missbufcnt
; /* keep track of buffers to post */
152 struct list_head postbufq
;
153 uint16_t postbufq_cnt
; /* current length of queue */
154 uint16_t postbufq_max
; /* max length */
155 struct list_head iocb_continueq
;
156 uint16_t iocb_continueq_cnt
; /* current length of queue */
157 uint16_t iocb_continueq_max
; /* max length */
159 struct lpfc_sli_ring_mask prt
[LPFC_MAX_RING_MASK
];
160 uint32_t num_mask
; /* number of mask entries in prt array */
162 struct lpfc_sli_ring_stat stats
; /* SLI statistical info */
164 /* cmd ring available */
165 void (*lpfc_sli_cmd_available
) (struct lpfc_hba
*,
166 struct lpfc_sli_ring
*);
169 /* Structure used to hold SLI statistical counters and info */
170 struct lpfc_sli_stat
{
171 uint64_t mbox_stat_err
; /* Mbox cmds completed status error */
172 uint64_t mbox_cmd
; /* Mailbox commands issued */
173 uint64_t sli_intr
; /* Count of Host Attention interrupts */
174 uint32_t err_attn_event
; /* Error Attn event counters */
175 uint32_t link_event
; /* Link event counters */
176 uint32_t mbox_event
; /* Mailbox event counters */
177 uint32_t mbox_busy
; /* Mailbox cmd busy */
180 /* Structure used to hold SLI information */
185 /* Additional sli_flags */
186 #define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */
187 #define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */
188 #define LPFC_PROCESS_LA 0x400 /* Able to process link attention */
190 struct lpfc_sli_ring ring
[LPFC_MAX_RING
];
191 int fcp_ring
; /* ring used for FCP initiator commands */
194 int ip_ring
; /* ring used for IP network drv cmds */
196 struct lpfc_sli_stat slistat
; /* SLI statistical info */
197 struct list_head mboxq
;
198 uint16_t mboxq_cnt
; /* current length of queue */
199 uint16_t mboxq_max
; /* max length */
200 LPFC_MBOXQ_t
*mbox_active
; /* active mboxq information */
202 struct timer_list mbox_tmo
; /* Hold clk to timeout active mbox
205 uint32_t *MBhostaddr
; /* virtual address for mbox cmds */
207 #define LPFC_IOCBQ_LOOKUP_INCREMENT 1024
208 struct lpfc_iocbq
** iocbq_lookup
; /* array to lookup IOCB by IOTAG */
209 size_t iocbq_lookup_len
; /* current lengs of the array */
210 uint16_t last_iotag
; /* last allocated IOTAG */
213 /* Given a pointer to the start of the ring, and the slot number of
214 * the desired iocb entry, calc a pointer to that entry.
215 * (assume iocb entry size is 32 bytes, or 8 words)
217 #define IOCB_ENTRY(ring,slot) ((IOCB_t *)(((char *)(ring)) + ((slot) * 32)))
219 #define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox
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