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 IOCB_t iocb; /* IOCB cmd */
37 uint8_t retry; /* retry counter for IOCB cmd - if needed */
39 #define LPFC_IO_POLL 1 /* Polling mode iocb */
40 #define LPFC_IO_LIBDFC 2 /* libdfc iocb */
41 #define LPFC_IO_WAIT 4
42 #define LPFC_IO_HIPRI 8 /* High Priority Queue signal flag */
46 uint32_t drvrTimeout; /* driver timeout in seconds */
47 void *context1; /* caller context information */
48 void *context2; /* caller context information */
49 void *context3; /* caller context information */
51 wait_queue_head_t *hipri_wait_queue; /* High Priority Queue wait
53 struct lpfc_iocbq *rsp_iocb;
54 struct lpfcMboxq *mbox;
57 void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
62 #define SLI_IOCB_RET_IOCB 1 /* Return IOCB if cmd ring full */
63 #define SLI_IOCB_HIGH_PRIORITY 2 /* High priority command */
65 #define IOCB_SUCCESS 0
68 #define IOCB_TIMEDOUT 3
70 typedef struct lpfcMboxq {
71 /* MBOXQs are used in single linked lists */
72 struct list_head list; /* ptr to next mailbox command */
73 MAILBOX_t mb; /* Mailbox cmd */
74 void *context1; /* caller context information */
75 void *context2; /* caller context information */
77 void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
81 #define MBX_POLL 1 /* poll mailbox till command done, then
83 #define MBX_NOWAIT 2 /* issue command then return immediately */
84 #define MBX_STOP_IOCB 4 /* Stop iocb processing till mbox cmds
87 #define LPFC_MAX_RING_MASK 4 /* max num of rctl/type masks allowed per
89 #define LPFC_MAX_RING 4 /* max num of SLI rings used by driver */
93 struct lpfc_sli_ring_mask {
94 uint8_t profile; /* profile associated with ring */
95 uint8_t rctl; /* rctl / type pair configured for ring */
96 uint8_t type; /* rctl / type pair configured for ring */
98 /* rcv'd unsol event */
99 void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
100 struct lpfc_sli_ring *,
101 struct lpfc_iocbq *);
105 /* Structure used to hold SLI statistical counters and info */
106 struct lpfc_sli_ring_stat {
107 uint64_t iocb_event; /* IOCB event counters */
108 uint64_t iocb_cmd; /* IOCB cmd issued */
109 uint64_t iocb_rsp; /* IOCB rsp received */
110 uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
111 uint64_t iocb_cmd_full; /* IOCB cmd ring full */
112 uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
113 uint64_t iocb_rsp_full; /* IOCB rsp ring full */
116 /* Structure used to hold SLI ring information */
117 struct lpfc_sli_ring {
118 uint16_t flag; /* ring flags */
119 #define LPFC_DEFERRED_RING_EVENT 0x001 /* Deferred processing a ring event */
120 #define LPFC_CALL_RING_AVAILABLE 0x002 /* indicates cmd was full */
121 #define LPFC_STOP_IOCB_MBX 0x010 /* Stop processing IOCB cmds mbox */
122 #define LPFC_STOP_IOCB_EVENT 0x020 /* Stop processing IOCB cmds event */
123 #define LPFC_STOP_IOCB_MASK 0x030 /* Stop processing IOCB cmds mask */
124 uint16_t abtsiotag; /* tracks next iotag to use for ABTS */
126 uint32_t local_getidx; /* last available cmd index (from cmdGetInx) */
127 uint32_t next_cmdidx; /* next_cmd index */
129 uint8_t ringno; /* ring number */
130 uint8_t rspidx; /* current index in response ring */
131 uint8_t cmdidx; /* current index in command ring */
132 uint16_t numCiocb; /* number of command iocb's per ring */
133 uint16_t numRiocb; /* number of rsp iocb's per ring */
135 uint32_t fast_iotag; /* max fastlookup based iotag */
136 uint32_t iotag_ctr; /* keeps track of the next iotag to use */
137 uint32_t iotag_max; /* max iotag value to use */
138 struct lpfc_iocbq ** fast_lookup; /* array of IOCB ptrs indexed by
140 struct list_head txq;
141 uint16_t txq_cnt; /* current length of queue */
142 uint16_t txq_max; /* max length */
143 struct list_head txcmplq;
144 uint16_t txcmplq_cnt; /* current length of queue */
145 uint16_t txcmplq_max; /* max length */
146 uint32_t *cmdringaddr; /* virtual address for cmd rings */
147 uint32_t *rspringaddr; /* virtual address for rsp rings */
148 uint32_t missbufcnt; /* keep track of buffers to post */
149 struct list_head postbufq;
150 uint16_t postbufq_cnt; /* current length of queue */
151 uint16_t postbufq_max; /* max length */
152 struct list_head iocb_continueq;
153 uint16_t iocb_continueq_cnt; /* current length of queue */
154 uint16_t iocb_continueq_max; /* max length */
156 struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
157 uint32_t num_mask; /* number of mask entries in prt array */
159 struct lpfc_sli_ring_stat stats; /* SLI statistical info */
161 /* cmd ring available */
162 void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
163 struct lpfc_sli_ring *);
166 /* Structure used to hold SLI statistical counters and info */
167 struct lpfc_sli_stat {
168 uint64_t mbox_stat_err; /* Mbox cmds completed status error */
169 uint64_t mbox_cmd; /* Mailbox commands issued */
170 uint64_t sli_intr; /* Count of Host Attention interrupts */
171 uint32_t err_attn_event; /* Error Attn event counters */
172 uint32_t link_event; /* Link event counters */
173 uint32_t mbox_event; /* Mailbox event counters */
174 uint32_t mbox_busy; /* Mailbox cmd busy */
177 /* Structure used to hold SLI information */
182 /* Additional sli_flags */
183 #define LPFC_SLI_MBOX_ACTIVE 0x100 /* HBA mailbox is currently active */
184 #define LPFC_SLI2_ACTIVE 0x200 /* SLI2 overlay in firmware is active */
185 #define LPFC_PROCESS_LA 0x400 /* Able to process link attention */
187 struct lpfc_sli_ring ring[LPFC_MAX_RING];
188 int fcp_ring; /* ring used for FCP initiator commands */
191 int ip_ring; /* ring used for IP network drv cmds */
193 struct lpfc_sli_stat slistat; /* SLI statistical info */
194 struct list_head mboxq;
195 uint16_t mboxq_cnt; /* current length of queue */
196 uint16_t mboxq_max; /* max length */
197 LPFC_MBOXQ_t *mbox_active; /* active mboxq information */
199 struct timer_list mbox_tmo; /* Hold clk to timeout active mbox
202 uint32_t *MBhostaddr; /* virtual address for mbox cmds */
205 /* Given a pointer to the start of the ring, and the slot number of
206 * the desired iocb entry, calc a pointer to that entry.
207 * (assume iocb entry size is 32 bytes, or 8 words)
209 #define IOCB_ENTRY(ring,slot) ((IOCB_t *)(((char *)(ring)) + ((slot) * 32)))
211 #define LPFC_MBOX_TMO 30 /* Sec tmo for outstanding mbox