RT-AC66 3.0.0.4.374.130 core
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / scsi / lpfc / lpfc_sli.h
blob41c38d324ab005ce43efd90f27d7be2fd93c5db2
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 *******************************************************************/
21 /* forward declaration for LPFC_IOCB_t's use */
22 struct lpfc_hba;
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;
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;
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 */
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;
59 void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
60 struct lpfc_iocbq *);
64 #define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */
66 #define IOCB_SUCCESS 0
67 #define IOCB_BUSY 1
68 #define IOCB_ERROR 2
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 *);
81 uint8_t mbox_flag;
83 } LPFC_MBOXQ_t;
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 */
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 */
95 struct lpfc_sli_ring;
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 *);
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 */
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 */
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 */
192 struct lpfc_sli {
193 uint32_t num_rings;
194 uint32_t sli_flag;
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 */
203 int next_ring;
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
214 cmd */
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
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.