blob: 10dd5a9ddfd3995c22baf6039ce8daf64430e28d [file] [log] [blame]
dea31012005-04-17 16:05:31 -05001/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
James.Smart@Emulex.Comc44ce172005-06-25 10:34:39 -04003 * Fibre Channel Host Bus Adapters. *
Jamie Wellnitz56178642006-02-28 22:33:06 -05004 * Copyright (C) 2004-2006 Emulex. All rights reserved. *
James.Smart@Emulex.Comc44ce172005-06-25 10:34:39 -04005 * EMULEX and SLI are trademarks of Emulex. *
dea31012005-04-17 16:05:31 -05006 * www.emulex.com *
7 * *
8 * This program is free software; you can redistribute it and/or *
James.Smart@Emulex.Comc44ce172005-06-25 10:34:39 -04009 * 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. *
dea31012005-04-17 16:05:31 -050019 *******************************************************************/
20
dea31012005-04-17 16:05:31 -050021/* forward declaration for LPFC_IOCB_t's use */
22struct lpfc_hba;
23
24/* Define the context types that SLI handles for abort and sums. */
25typedef enum _lpfc_ctx_cmd {
26 LPFC_CTX_LUN,
27 LPFC_CTX_TGT,
28 LPFC_CTX_CTX,
29 LPFC_CTX_HOST
30} lpfc_ctx_cmd;
31
32/* This structure is used to handle IOCB requests / responses */
33struct lpfc_iocbq {
34 /* lpfc_iocbqs are used in double linked lists */
35 struct list_head list;
James Bottomley604a3e32005-10-29 10:28:33 -050036 uint16_t iotag; /* pre-assigned IO tag */
37 uint16_t rsvd1;
38
dea31012005-04-17 16:05:31 -050039 IOCB_t iocb; /* IOCB cmd */
40 uint8_t retry; /* retry counter for IOCB cmd - if needed */
41 uint8_t iocb_flag;
James Smart07951072007-04-25 09:51:38 -040042#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 */
dea31012005-04-17 16:05:31 -050046
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 {
James.Smart@Emulex.Com68876922005-10-28 20:29:47 -040054 wait_queue_head_t *wait_queue;
dea31012005-04-17 16:05:31 -050055 struct lpfc_iocbq *rsp_iocb;
56 struct lpfcMboxq *mbox;
57 } context_un;
58
59 void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
60 struct lpfc_iocbq *);
61
62};
63
64#define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */
dea31012005-04-17 16:05:31 -050065
66#define IOCB_SUCCESS 0
67#define IOCB_BUSY 1
68#define IOCB_ERROR 2
69#define IOCB_TIMEDOUT 3
70
71typedef 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 */
77
78 void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
79
80} LPFC_MBOXQ_t;
81
82#define MBX_POLL 1 /* poll mailbox till command done, then
83 return */
84#define MBX_NOWAIT 2 /* issue command then return immediately */
85#define MBX_STOP_IOCB 4 /* Stop iocb processing till mbox cmds
86 complete */
87
88#define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per
89 ring */
90#define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */
91
92struct lpfc_sli_ring;
93
94struct 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 */
98 uint8_t rsvd;
99 /* rcv'd unsol event */
100 void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
101 struct lpfc_sli_ring *,
102 struct lpfc_iocbq *);
103};
104
105
106/* Structure used to hold SLI statistical counters and info */
107struct 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 */
115};
116
117/* Structure used to hold SLI ring information */
118struct 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 */
126
127 uint32_t local_getidx; /* last available cmd index (from cmdGetInx) */
128 uint32_t next_cmdidx; /* next_cmd index */
James.Smart@Emulex.Comf91b3922005-10-28 20:29:28 -0400129 uint32_t rspidx; /* current index in response ring */
130 uint32_t cmdidx; /* current index in command ring */
dea31012005-04-17 16:05:31 -0500131 uint8_t rsvd;
132 uint8_t ringno; /* ring number */
dea31012005-04-17 16:05:31 -0500133 uint16_t numCiocb; /* number of command iocb's per ring */
134 uint16_t numRiocb; /* number of rsp iocb's per ring */
135
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 */
dea31012005-04-17 16:05:31 -0500139 struct list_head txq;
140 uint16_t txq_cnt; /* current length of queue */
141 uint16_t txq_max; /* max length */
142 struct list_head txcmplq;
143 uint16_t txcmplq_cnt; /* current length of queue */
144 uint16_t txcmplq_max; /* max length */
145 uint32_t *cmdringaddr; /* virtual address for cmd rings */
146 uint32_t *rspringaddr; /* virtual address for rsp rings */
147 uint32_t missbufcnt; /* keep track of buffers to post */
148 struct list_head postbufq;
149 uint16_t postbufq_cnt; /* current length of queue */
150 uint16_t postbufq_max; /* max length */
151 struct list_head iocb_continueq;
152 uint16_t iocb_continueq_cnt; /* current length of queue */
153 uint16_t iocb_continueq_max; /* max length */
154
155 struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
156 uint32_t num_mask; /* number of mask entries in prt array */
157
158 struct lpfc_sli_ring_stat stats; /* SLI statistical info */
159
160 /* cmd ring available */
161 void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
162 struct lpfc_sli_ring *);
163};
164
165/* Structure used to hold SLI statistical counters and info */
166struct lpfc_sli_stat {
167 uint64_t mbox_stat_err; /* Mbox cmds completed status error */
168 uint64_t mbox_cmd; /* Mailbox commands issued */
169 uint64_t sli_intr; /* Count of Host Attention interrupts */
170 uint32_t err_attn_event; /* Error Attn event counters */
171 uint32_t link_event; /* Link event counters */
172 uint32_t mbox_event; /* Mailbox event counters */
173 uint32_t mbox_busy; /* Mailbox cmd busy */
174};
175
James Smart64ba8812006-08-02 15:24:34 -0400176/* Structure to store link status values when port stats are reset */
177struct lpfc_lnk_stat {
178 uint32_t link_failure_count;
179 uint32_t loss_of_sync_count;
180 uint32_t loss_of_signal_count;
181 uint32_t prim_seq_protocol_err_count;
182 uint32_t invalid_tx_word_count;
183 uint32_t invalid_crc_count;
184 uint32_t error_frames;
185 uint32_t link_events;
186};
187
dea31012005-04-17 16:05:31 -0500188/* Structure used to hold SLI information */
189struct lpfc_sli {
190 uint32_t num_rings;
191 uint32_t sli_flag;
192
193 /* Additional sli_flags */
194#define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */
195#define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */
196#define LPFC_PROCESS_LA 0x400 /* Able to process link attention */
197
198 struct lpfc_sli_ring ring[LPFC_MAX_RING];
199 int fcp_ring; /* ring used for FCP initiator commands */
200 int next_ring;
201
James Smarta4bc3372006-12-02 13:34:16 -0500202 int extra_ring; /* extra ring used for other protocols */
dea31012005-04-17 16:05:31 -0500203
204 struct lpfc_sli_stat slistat; /* SLI statistical info */
205 struct list_head mboxq;
206 uint16_t mboxq_cnt; /* current length of queue */
207 uint16_t mboxq_max; /* max length */
208 LPFC_MBOXQ_t *mbox_active; /* active mboxq information */
209
210 struct timer_list mbox_tmo; /* Hold clk to timeout active mbox
211 cmd */
212
James Bottomley604a3e32005-10-29 10:28:33 -0500213#define LPFC_IOCBQ_LOOKUP_INCREMENT 1024
214 struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
215 size_t iocbq_lookup_len; /* current lengs of the array */
216 uint16_t last_iotag; /* last allocated IOTAG */
James Smart64ba8812006-08-02 15:24:34 -0400217 unsigned long stats_start; /* in seconds */
218 struct lpfc_lnk_stat lnk_stat_offsets;
dea31012005-04-17 16:05:31 -0500219};
220
221/* Given a pointer to the start of the ring, and the slot number of
222 * the desired iocb entry, calc a pointer to that entry.
223 * (assume iocb entry size is 32 bytes, or 8 words)
224 */
225#define IOCB_ENTRY(ring,slot) ((IOCB_t *)(((char *)(ring)) + ((slot) * 32)))
226
227#define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox
228 command */
James Smarta309a6b2006-08-01 07:33:43 -0400229#define LPFC_MBOX_TMO_FLASH_CMD 300 /* Sec tmo for outstanding FLASH write
230 * or erase cmds. This is especially
231 * long because of the potential of
232 * multiple flash erases that can be
233 * spawned.
234 */