sc_mbmem.c revision 1.15 1 1.15 thorpej /* $NetBSD: sc_mbmem.c,v 1.15 2020/11/21 00:27:52 thorpej Exp $ */
2 1.1 fredette
3 1.1 fredette /*-
4 1.1 fredette * Copyright (c) 1996 The NetBSD Foundation, Inc.
5 1.1 fredette * All rights reserved.
6 1.1 fredette *
7 1.1 fredette * This code is derived from software contributed to The NetBSD Foundation
8 1.1 fredette * by Adam Glass, David Jones, Gordon W. Ross, and Matthew Fredette.
9 1.1 fredette *
10 1.1 fredette * Redistribution and use in source and binary forms, with or without
11 1.1 fredette * modification, are permitted provided that the following conditions
12 1.1 fredette * are met:
13 1.1 fredette * 1. Redistributions of source code must retain the above copyright
14 1.1 fredette * notice, this list of conditions and the following disclaimer.
15 1.1 fredette * 2. Redistributions in binary form must reproduce the above copyright
16 1.1 fredette * notice, this list of conditions and the following disclaimer in the
17 1.1 fredette * documentation and/or other materials provided with the distribution.
18 1.1 fredette *
19 1.1 fredette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 1.1 fredette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 1.1 fredette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 1.1 fredette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 1.1 fredette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 1.1 fredette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 1.1 fredette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 1.1 fredette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 1.1 fredette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 1.1 fredette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 1.1 fredette * POSSIBILITY OF SUCH DAMAGE.
30 1.1 fredette */
31 1.1 fredette
32 1.1 fredette /*
33 1.1 fredette * This file contains only the machine-dependent parts of the
34 1.1 fredette * Sun-2 SCSI driver. (Autoconfig stuff and DMA functions.)
35 1.1 fredette * The machine-independent parts are in sunscpal.c
36 1.1 fredette *
37 1.1 fredette * Supported hardware includes:
38 1.1 fredette * Sun SCSI-2 on Multibus (Sun2/120,Sun2/170)
39 1.1 fredette * Sun SCSI-2 on VME (Sun2/50,Sun3/160,Sun3/260,others?)
40 1.1 fredette *
41 1.1 fredette * Credits, history:
42 1.1 fredette *
43 1.1 fredette * Matthew Fredette took revision 1.15 of si_vme.c, and then heavily
44 1.1 fredette * modified it to support the Sun sc. The remaining credits
45 1.1 fredette * are from si_vme.c:
46 1.1 fredette *
47 1.1 fredette * David Jones wrote the initial version of this module, which
48 1.1 fredette * included support for the VME adapter only. (no reselection).
49 1.1 fredette *
50 1.1 fredette * Gordon Ross added support for the OBIO adapter, and re-worked
51 1.1 fredette * both the VME and OBIO code to support disconnect/reselect.
52 1.1 fredette * (Required figuring out the hardware "features" noted above.)
53 1.1 fredette *
54 1.1 fredette * The autoconfiguration boilerplate came from Adam Glass.
55 1.1 fredette */
56 1.1 fredette
57 1.1 fredette /*****************************************************************
58 1.1 fredette * Multibus functions for sc
59 1.1 fredette ****************************************************************/
60 1.8 lukem
61 1.8 lukem #include <sys/cdefs.h>
62 1.15 thorpej __KERNEL_RCSID(0, "$NetBSD: sc_mbmem.c,v 1.15 2020/11/21 00:27:52 thorpej Exp $");
63 1.1 fredette
64 1.1 fredette #include <sys/param.h>
65 1.1 fredette #include <sys/systm.h>
66 1.1 fredette #include <sys/errno.h>
67 1.1 fredette #include <sys/kernel.h>
68 1.15 thorpej #include <sys/kmem.h>
69 1.1 fredette #include <sys/device.h>
70 1.1 fredette #include <sys/buf.h>
71 1.1 fredette #include <sys/proc.h>
72 1.1 fredette
73 1.1 fredette #include <dev/scsipi/scsi_all.h>
74 1.1 fredette #include <dev/scsipi/scsipi_all.h>
75 1.1 fredette #include <dev/scsipi/scsipi_debug.h>
76 1.1 fredette #include <dev/scsipi/scsiconf.h>
77 1.1 fredette
78 1.1 fredette #include <machine/autoconf.h>
79 1.1 fredette #include <machine/bus.h>
80 1.1 fredette
81 1.1 fredette /* #define DEBUG XXX */
82 1.1 fredette
83 1.1 fredette #include <dev/ic/sunscpalreg.h>
84 1.1 fredette #include <dev/ic/sunscpalvar.h>
85 1.1 fredette
86 1.2 fredette /* Yes, we use a VME header file. */
87 1.2 fredette #include <dev/vme/screg.h>
88 1.1 fredette
89 1.1 fredette /*
90 1.1 fredette * Transfers smaller than this are done using PIO
91 1.1 fredette * (on assumption they're not worth DMA overhead)
92 1.1 fredette */
93 1.1 fredette #define MIN_DMA_LEN 128
94 1.1 fredette
95 1.1 fredette /*
96 1.1 fredette * New-style autoconfig attachment
97 1.1 fredette */
98 1.1 fredette
99 1.13 tsutsui static int sunsc_mbmem_match(device_t, cfdata_t, void *);
100 1.13 tsutsui static void sunsc_mbmem_attach(device_t, device_t, void *);
101 1.9 chs static int sunsc_mbmem_intr(void *);
102 1.1 fredette
103 1.13 tsutsui CFATTACH_DECL_NEW(sc_mbmem, sizeof(struct sunscpal_softc),
104 1.6 thorpej sunsc_mbmem_match, sunsc_mbmem_attach, NULL, NULL);
105 1.1 fredette
106 1.1 fredette /*
107 1.1 fredette * Options for parity, DMA, and interrupts.
108 1.1 fredette */
109 1.1 fredette int sunsc_mbmem_options = 0x00;
110 1.1 fredette
111 1.9 chs static int
112 1.13 tsutsui sunsc_mbmem_match(device_t parent, cfdata_t cf, void *aux)
113 1.1 fredette {
114 1.2 fredette struct mbmem_attach_args *mbma = aux;
115 1.2 fredette bus_space_handle_t bh;
116 1.13 tsutsui bool matched;
117 1.1 fredette
118 1.1 fredette /* No default Multibus address. */
119 1.2 fredette if (mbma->mbma_paddr == -1)
120 1.13 tsutsui return 0;
121 1.1 fredette
122 1.2 fredette /* Make sure there is something there... */
123 1.2 fredette if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ,
124 1.13 tsutsui 0, &bh))
125 1.13 tsutsui return 0;
126 1.13 tsutsui matched =
127 1.13 tsutsui (bus_space_peek_2(mbma->mbma_bustag, bh, SCREG_ICR, NULL) == 0);
128 1.2 fredette bus_space_unmap(mbma->mbma_bustag, bh, SCREG_BANK_SZ);
129 1.2 fredette if (!matched)
130 1.13 tsutsui return 0;
131 1.1 fredette
132 1.1 fredette /* Default interrupt priority. */
133 1.2 fredette if (mbma->mbma_pri == -1)
134 1.2 fredette mbma->mbma_pri = 2;
135 1.1 fredette
136 1.13 tsutsui return 1;
137 1.1 fredette }
138 1.1 fredette
139 1.9 chs static void
140 1.13 tsutsui sunsc_mbmem_attach(device_t parent, device_t self, void *args)
141 1.1 fredette {
142 1.13 tsutsui struct sunscpal_softc *sc = device_private(self);
143 1.11 thorpej struct cfdata *cf = device_cfdata(self);
144 1.2 fredette struct mbmem_attach_args *mbma = args;
145 1.2 fredette int i;
146 1.1 fredette
147 1.13 tsutsui sc->sc_dev = self;
148 1.13 tsutsui
149 1.1 fredette /* Map in the device. */
150 1.2 fredette sc->sunscpal_regt = mbma->mbma_bustag;
151 1.2 fredette sc->sunscpal_dmat = mbma->mbma_dmatag;
152 1.2 fredette if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ,
153 1.13 tsutsui 0, &sc->sunscpal_regh))
154 1.13 tsutsui panic("%s: can't map", __func__);
155 1.1 fredette
156 1.1 fredette /* Device register offsets. */
157 1.2 fredette sc->sunscpal_data = SCREG_DATA;
158 1.2 fredette sc->sunscpal_cmd_stat = SCREG_CMD_STAT;
159 1.2 fredette sc->sunscpal_icr = SCREG_ICR;
160 1.2 fredette sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H;
161 1.2 fredette sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L;
162 1.2 fredette sc->sunscpal_dma_count = SCREG_DMA_COUNT;
163 1.2 fredette sc->sunscpal_intvec = SCREG_INTVEC;
164 1.1 fredette
165 1.2 fredette /* Allocate DMA handles. */
166 1.2 fredette i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle);
167 1.15 thorpej sc->sc_dma_handles = kmem_alloc(i, KM_SLEEP);
168 1.2 fredette for (i = 0; i < SUNSCPAL_OPENINGS; i++)
169 1.2 fredette if (bus_dmamap_create(sc->sunscpal_dmat, SUNSCPAL_MAX_DMA_LEN,
170 1.13 tsutsui 1, SUNSCPAL_MAX_DMA_LEN,
171 1.13 tsutsui 0, BUS_DMA_WAITOK, &sc->sc_dma_handles[i].dh_dmamap) != 0)
172 1.7 wiz panic("sc: DMA map create failed");
173 1.2 fredette
174 1.1 fredette /* Miscellaneous. */
175 1.1 fredette sc->sc_min_dma_len = MIN_DMA_LEN;
176 1.1 fredette sc->sc_rev = SUNSCPAL_VARIANT_501_1006;
177 1.1 fredette
178 1.1 fredette /* Attach interrupt handler. */
179 1.2 fredette bus_intr_establish(mbma->mbma_bustag, mbma->mbma_pri, IPL_BIO, 0,
180 1.13 tsutsui sunsc_mbmem_intr, sc);
181 1.1 fredette
182 1.1 fredette /* Do the common attach stuff. */
183 1.13 tsutsui sunscpal_attach(sc, cf->cf_flags ? cf->cf_flags : sunsc_mbmem_options);
184 1.1 fredette }
185 1.1 fredette
186 1.1 fredette static int
187 1.1 fredette sunsc_mbmem_intr(void *arg)
188 1.1 fredette {
189 1.1 fredette struct sunscpal_softc *sc = arg;
190 1.1 fredette int claimed;
191 1.1 fredette
192 1.1 fredette claimed = sunscpal_intr(sc);
193 1.1 fredette #ifdef DEBUG
194 1.13 tsutsui if (claimed == 0) {
195 1.13 tsutsui printf("%s: spurious from SBC\n", __func__);
196 1.1 fredette }
197 1.1 fredette #endif
198 1.1 fredette /* Yes, we DID cause this interrupt. */
199 1.1 fredette claimed = 1;
200 1.1 fredette
201 1.13 tsutsui return claimed;
202 1.1 fredette }
203