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 struct lpfc_vport;
24
25 /* Define the context types that SLI handles for abort and sums. */
26 typedef enum _lpfc_ctx_cmd {
27 LPFC_CTX_LUN,
28 LPFC_CTX_TGT,
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 struct list_head clist;
37 uint16_t iotag; /* pre-assigned IO tag */
38 uint16_t rsvd1;
39
40 IOCB_t iocb; /* IOCB cmd */
41 uint8_t retry; /* retry counter for IOCB cmd - if needed */
42 uint8_t iocb_flag;
43 #define LPFC_IO_LIBDFC 1 /* libdfc iocb */
44 #define LPFC_IO_WAKE 2 /* High Priority Queue signal flag */
45 #define LPFC_IO_FCP 4 /* FCP command -- iocbq in scsi_buf */
46 #define LPFC_DRIVER_ABORTED 8 /* driver aborted this request */
47 #define LPFC_IO_FABRIC 0x10 /* Iocb send using fabric scheduler */
48 #define LPFC_DELAY_MEM_FREE 0x20 /* Defer free'ing of FC data */
49
50 uint8_t abort_count;
51 uint8_t rsvd2;
52 uint32_t drvrTimeout; /* driver timeout in seconds */
53 struct lpfc_vport *vport;/* virtual port pointer */
54 void *context1; /* caller context information */
55 void *context2; /* caller context information */
56 void *context3; /* caller context information */
57 union {
58 wait_queue_head_t *wait_queue;
59 struct lpfc_iocbq *rsp_iocb;
60 struct lpfcMboxq *mbox;
61 struct lpfc_nodelist *ndlp;
62 } context_un;
63
64 void (*fabric_iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
65 struct lpfc_iocbq *);
66 void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
67 struct lpfc_iocbq *);
68
69 };
70
71 #define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */
72
73 #define IOCB_SUCCESS 0
74 #define IOCB_BUSY 1
75 #define IOCB_ERROR 2
76 #define IOCB_TIMEDOUT 3
77
78 #define LPFC_MBX_WAKE 1
79 #define LPFC_MBX_IMED_UNREG 2
80
81 typedef struct lpfcMboxq {
82 /* MBOXQs are used in single linked lists */
83 struct list_head list; /* ptr to next mailbox command */
84 MAILBOX_t mb; /* Mailbox cmd */
85 struct lpfc_vport *vport;/* virutal port pointer */
86 void *context1; /* caller context information */
87 void *context2; /* caller context information */
88
89 void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
90 uint8_t mbox_flag;
91
92 } LPFC_MBOXQ_t;
93
94 #define MBX_POLL 1 /* poll mailbox till command done, then
95 return */
96 #define MBX_NOWAIT 2 /* issue command then return immediately */
97
98 #define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per
99 ring */
100 #define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */
101
102 struct lpfc_sli_ring;
103
104 struct lpfc_sli_ring_mask {
105 uint8_t profile; /* profile associated with ring */
106 uint8_t rctl; /* rctl / type pair configured for ring */
107 uint8_t type; /* rctl / type pair configured for ring */
108 uint8_t rsvd;
109 /* rcv'd unsol event */
110 void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
111 struct lpfc_sli_ring *,
112 struct lpfc_iocbq *);
113 };
114
115
116 /* Structure used to hold SLI statistical counters and info */
117 struct lpfc_sli_ring_stat {
118 uint64_t iocb_event; /* IOCB event counters */
119 uint64_t iocb_cmd; /* IOCB cmd issued */
120 uint64_t iocb_rsp; /* IOCB rsp received */
121 uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
122 uint64_t iocb_cmd_full; /* IOCB cmd ring full */
123 uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
124 uint64_t iocb_rsp_full; /* IOCB rsp ring full */
125 };
126
127 /* Structure used to hold SLI ring information */
128 struct lpfc_sli_ring {
129 uint16_t flag; /* ring flags */
130 #define LPFC_DEFERRED_RING_EVENT 0x001 /* Deferred processing a ring event */
131 #define LPFC_CALL_RING_AVAILABLE 0x002 /* indicates cmd was full */
132 #define LPFC_STOP_IOCB_EVENT 0x020 /* Stop processing IOCB cmds event */
133 uint16_t abtsiotag; /* tracks next iotag to use for ABTS */
134
135 uint32_t local_getidx; /* last available cmd index (from cmdGetInx) */
136 uint32_t next_cmdidx; /* next_cmd index */
137 uint32_t rspidx; /* current index in response ring */
138 uint32_t cmdidx; /* current index in command ring */
139 uint8_t rsvd;
140 uint8_t ringno; /* ring number */
141 uint16_t numCiocb; /* number of command iocb's per ring */
142 uint16_t numRiocb; /* number of rsp iocb's per ring */
143 uint16_t sizeCiocb; /* Size of command iocb's in this ring */
144 uint16_t sizeRiocb; /* Size of response iocb's in this ring */
145
146 uint32_t fast_iotag; /* max fastlookup based iotag */
147 uint32_t iotag_ctr; /* keeps track of the next iotag to use */
148 uint32_t iotag_max; /* max iotag value to use */
149 struct list_head txq;
150 uint16_t txq_cnt; /* current length of queue */
151 uint16_t txq_max; /* max length */
152 struct list_head txcmplq;
153 uint16_t txcmplq_cnt; /* current length of queue */
154 uint16_t txcmplq_max; /* max length */
155 uint32_t *cmdringaddr; /* virtual address for cmd rings */
156 uint32_t *rspringaddr; /* virtual address for rsp rings */
157 uint32_t missbufcnt; /* keep track of buffers to post */
158 struct list_head postbufq;
159 uint16_t postbufq_cnt; /* current length of queue */
160 uint16_t postbufq_max; /* max length */
161 struct list_head iocb_continueq;
162 uint16_t iocb_continueq_cnt; /* current length of queue */
163 uint16_t iocb_continueq_max; /* max length */
164 struct list_head iocb_continue_saveq;
165
166 struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
167 uint32_t num_mask; /* number of mask entries in prt array */
168 void (*lpfc_sli_rcv_async_status) (struct lpfc_hba *,
169 struct lpfc_sli_ring *, struct lpfc_iocbq *);
170
171 struct lpfc_sli_ring_stat stats; /* SLI statistical info */
172
173 /* cmd ring available */
174 void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
175 struct lpfc_sli_ring *);
176 };
177
178 /* Structure used for configuring rings to a specific profile or rctl / type */
179 struct lpfc_hbq_init {
180 uint32_t rn; /* Receive buffer notification */
181 uint32_t entry_count; /* max # of entries in HBQ */
182 uint32_t headerLen; /* 0 if not profile 4 or 5 */
183 uint32_t logEntry; /* Set to 1 if this HBQ used for LogEntry */
184 uint32_t profile; /* Selection profile 0=all, 7=logentry */
185 uint32_t ring_mask; /* Binds HBQ to a ring e.g. Ring0=b0001,
186 * ring2=b0100 */
187 uint32_t hbq_index; /* index of this hbq in ring .HBQs[] */
188
189 uint32_t seqlenoff;
190 uint32_t maxlen;
191 uint32_t seqlenbcnt;
192 uint32_t cmdcodeoff;
193 uint32_t cmdmatch[8];
194 uint32_t mask_count; /* number of mask entries in prt array */
195 struct hbq_mask hbqMasks[6];
196
197 /* Non-config rings fields to keep track of buffer allocations */
198 uint32_t buffer_count; /* number of buffers allocated */
199 uint32_t init_count; /* number to allocate when initialized */
200 uint32_t add_count; /* number to allocate when starved */
201 } ;
202
203 /* Structure used to hold SLI statistical counters and info */
204 struct lpfc_sli_stat {
205 uint64_t mbox_stat_err; /* Mbox cmds completed status error */
206 uint64_t mbox_cmd; /* Mailbox commands issued */
207 uint64_t sli_intr; /* Count of Host Attention interrupts */
208 uint32_t err_attn_event; /* Error Attn event counters */
209 uint32_t link_event; /* Link event counters */
210 uint32_t mbox_event; /* Mailbox event counters */
211 uint32_t mbox_busy; /* Mailbox cmd busy */
212 };
213
214 /* Structure to store link status values when port stats are reset */
215 struct lpfc_lnk_stat {
216 uint32_t link_failure_count;
217 uint32_t loss_of_sync_count;
218 uint32_t loss_of_signal_count;
219 uint32_t prim_seq_protocol_err_count;
220 uint32_t invalid_tx_word_count;
221 uint32_t invalid_crc_count;
222 uint32_t error_frames;
223 uint32_t link_events;
224 };
225
226 /* Structure used to hold SLI information */
227 struct lpfc_sli {
228 uint32_t num_rings;
229 uint32_t sli_flag;
230
231 /* Additional sli_flags */
232 #define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */
233 #define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */
234 #define LPFC_PROCESS_LA 0x400 /* Able to process link attention */
235 #define LPFC_BLOCK_MGMT_IO 0x800 /* Don't allow mgmt mbx or iocb cmds */
236
237 struct lpfc_sli_ring ring[LPFC_MAX_RING];
238 int fcp_ring; /* ring used for FCP initiator commands */
239 int next_ring;
240
241 int extra_ring; /* extra ring used for other protocols */
242
243 struct lpfc_sli_stat slistat; /* SLI statistical info */
244 struct list_head mboxq;
245 uint16_t mboxq_cnt; /* current length of queue */
246 uint16_t mboxq_max; /* max length */
247 LPFC_MBOXQ_t *mbox_active; /* active mboxq information */
248 struct list_head mboxq_cmpl;
249
250 struct timer_list mbox_tmo; /* Hold clk to timeout active mbox
251 cmd */
252
253 #define LPFC_IOCBQ_LOOKUP_INCREMENT 1024
254 struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
255 size_t iocbq_lookup_len; /* current lengs of the array */
256 uint16_t last_iotag; /* last allocated IOTAG */
257 unsigned long stats_start; /* in seconds */
258 struct lpfc_lnk_stat lnk_stat_offsets;
259 };
260
261 #define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox
262 command */
263 #define LPFC_MBOX_TMO_FLASH_CMD 300 /* Sec tmo for outstanding FLASH write
264 * or erase cmds. This is especially
265 * long because of the potential of
266 * multiple flash erases that can be
267 * spawned.
268 */
269
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