FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/esiopvar.h
1 /* $NetBSD: esiopvar.h,v 1.15 2006/02/16 20:17:16 perry Exp $ */
2
3 /*
4 * Copyright (c) 2002 Manuel Bouyer.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Manuel Bouyer.
17 * 4. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 */
32
33 /* structure and definitions for the siop driver */
34
35 /* Number of tag */
36 #define ESIOP_NTAG 256
37
38 /*
39 * description of a command scheduler slot. The script uses a ring of
40 * A_ncmd_slots of this.
41 */
42 struct esiop_slot {
43 u_int32_t dsa; /* DSA of the xfer. The first 2 bits holds flags */
44 } __attribute__((__packed__));
45
46 #define CMD_SLOTSIZE (sizeof(struct esiop_slot) / sizeof(u_int32_t))
47
48 /*
49 * xfer description of the script: tables and reselect script
50 * In struct siop_common_cmd siop_xfer will point to this.
51 * If you change this don't forget to update o_cmd_* and cmd_slot_size in script
52 */
53 struct esiop_xfer {
54 struct siop_common_xfer siop_tables;
55 u_int32_t tlq; /* target/lun/tag loaded in scratchC by script */
56 u_int32_t saved_offset;/* contains scratchA if script saved an offset */
57 } __attribute__((__packed__));
58
59 #define ESIOP_XFER(cmd, m) (((struct esiop_xfer *)((cmd)->cmd_tables))->m)
60
61 /*
62 * This describes a command handled by the SCSI controller
63 * These are chained in either a free list or a active list
64 * We have one queue per target
65 */
66
67 struct esiop_cmd {
68 TAILQ_ENTRY (esiop_cmd) next;
69 struct siop_common_cmd cmd_c;
70 struct esiop_cbd *esiop_cbdp; /* pointer to our siop_cbd */
71 };
72 #define cmd_tables cmd_c.siop_tables
73
74 /* command block descriptors: an array of siop_cmd + an array of siop_xfer */
75 struct esiop_cbd {
76 TAILQ_ENTRY (esiop_cbd) next;
77 struct esiop_cmd *cmds;
78 struct esiop_xfer *xfers;
79 bus_dmamap_t xferdma; /* DMA map for this block of xfers */
80 };
81
82 TAILQ_HEAD(cmd_list, esiop_cmd);
83 TAILQ_HEAD(cbd_list, esiop_cbd);
84
85 /* DSA table descriptor for tags. Free tables are in a list */
86 struct esiop_dsatbl {
87 TAILQ_ENTRY (esiop_dsatbl) next;
88 u_int32_t *tbl; /* the table itself */
89 u_int32_t tbl_dsa; /* DSA of base of this table */
90 bus_addr_t tbl_offset; /* offset of this table in the map */
91 struct esiop_dsatblblk *tblblk; /* pointer back to our block */
92 };
93
94 /* DSA table block descriptor. */
95 struct esiop_dsatblblk {
96 TAILQ_ENTRY (esiop_dsatblblk) next;
97 bus_dmamap_t blkmap; /* DMA map of this block */
98 };
99
100 TAILQ_HEAD(tbl_list, esiop_dsatbl);
101 TAILQ_HEAD(tblblk_list, esiop_dsatblblk);
102
103 /* Number of table per block */
104 #define ESIOP_NTPB ((PAGE_SIZE) / (sizeof(u_int32_t) * ESIOP_NTAG))
105
106 /* per lun struct */
107 struct esiop_lun {
108 struct esiop_cmd *active; /* active non-tagged command */
109 struct esiop_cmd *tactive[ESIOP_NTAG]; /* active tagged commands */
110 int lun_flags; /* per-lun flags */
111 struct esiop_dsatbl *lun_tagtbl; /* the tag DSA table */
112 };
113
114 /*
115 * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
116 * will point to this
117 */
118 struct esiop_target {
119 struct siop_common_target target_c;
120 struct esiop_lun *esiop_lun[8]; /* per-lun state */
121 u_int32_t lun_table_offset; /* pointer to our DSA table */
122 };
123
124 static __inline void esiop_table_sync(struct esiop_cmd *, int);
125 static __inline void
126 esiop_table_sync(esiop_cmd, ops)
127 struct esiop_cmd *esiop_cmd;
128 int ops;
129 {
130 struct siop_common_softc *sc = esiop_cmd->cmd_c.siop_sc;
131 bus_addr_t offset;
132
133 offset = esiop_cmd->cmd_c.dsa -
134 esiop_cmd->esiop_cbdp->xferdma->dm_segs[0].ds_addr;
135 bus_dmamap_sync(sc->sc_dmat, esiop_cmd->esiop_cbdp->xferdma, offset,
136 sizeof(struct esiop_xfer), ops);
137 }
138
139
140
141 /* Driver internal state */
142 struct esiop_softc {
143 struct siop_common_softc sc_c;
144 u_int32_t sc_semoffset; /* semaphore */
145 u_int32_t sc_shedoffset; /* base of scheduler ring */
146 int sc_currschedslot; /* current scheduler slot */
147 struct cbd_list cmds; /* list of command block descriptors */
148 struct cmd_list free_list; /* cmd descr free list */
149 struct tbl_list free_tagtbl; /* list of free tag DSA tables */
150 struct tblblk_list tag_tblblk; /* tag DSA table blocks */
151 u_int32_t sc_flags;
152 u_int32_t sc_free_offset; /* pointer to free RAM */
153 u_int32_t sc_target_table_offset;/* pointer to target DSA table */
154 int sc_currdoneslot; /* current done slot */
155 bus_dmamap_t sc_done_map; /* dma map for done ring (shared) */
156 bus_addr_t sc_done_offset; /* offset of ring in sc_done_map */
157 u_int32_t *sc_done_slot; /* The done ring itself */
158 };
159
160 /* defs for sc_flags */
161 #define SCF_CHAN_NOSLOT 0x0001 /* channel out of scheduler slot */
162 #define SCF_CHAN_ADAPTREQ 0x0002 /* esiop_scsipi_request() is running */
163
164 void esiop_attach(struct esiop_softc *);
165 int esiop_intr(void *);
166 void esiop_add_dev(struct esiop_softc *, int, int);
167 void esiop_del_dev(struct esiop_softc *, int, int);
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