1/* $NetBSD: sc_mbmem.c,v 1.16 2023/08/04 11:18:18 rin Exp $ */ 2 3/*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Glass, David Jones, Gordon W. Ross, and Matthew Fredette. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32/* 33 * This file contains only the machine-dependent parts of the 34 * Sun-2 SCSI driver. (Autoconfig stuff and DMA functions.) 35 * The machine-independent parts are in sunscpal.c 36 * 37 * Supported hardware includes: 38 * Sun SCSI-2 on Multibus (Sun2/120,Sun2/170) 39 * Sun SCSI-2 on VME (Sun2/50,Sun3/160,Sun3/260,others?) 40 * 41 * Credits, history: 42 * 43 * Matthew Fredette took revision 1.15 of si_vme.c, and then heavily 44 * modified it to support the Sun sc. The remaining credits 45 * are from si_vme.c: 46 * 47 * David Jones wrote the initial version of this module, which 48 * included support for the VME adapter only. (no reselection). 49 * 50 * Gordon Ross added support for the OBIO adapter, and re-worked 51 * both the VME and OBIO code to support disconnect/reselect. 52 * (Required figuring out the hardware "features" noted above.) 53 * 54 * The autoconfiguration boilerplate came from Adam Glass. 55 */ 56 57/***************************************************************** 58 * Multibus functions for sc 59 ****************************************************************/ 60 61#include <sys/cdefs.h> 62__KERNEL_RCSID(0, "$NetBSD: sc_mbmem.c,v 1.16 2023/08/04 11:18:18 rin Exp $"); 63 64#include <sys/param.h> 65#include <sys/systm.h> 66#include <sys/errno.h> 67#include <sys/kernel.h> 68#include <sys/kmem.h> 69#include <sys/device.h> 70#include <sys/buf.h> 71#include <sys/proc.h> 72 73#include <dev/scsipi/scsi_all.h> 74#include <dev/scsipi/scsipi_all.h> 75#include <dev/scsipi/scsipi_debug.h> 76#include <dev/scsipi/scsiconf.h> 77 78#include <machine/autoconf.h> 79#include <machine/bus.h> 80 81/* #define DEBUG XXX */ 82 83#include <dev/ic/sunscpalreg.h> 84#include <dev/ic/sunscpalvar.h> 85 86/* Yes, we use a VME header file. */ 87#include <dev/vme/screg.h> 88 89/* 90 * Transfers smaller than this are done using PIO 91 * (on assumption they're not worth DMA overhead) 92 */ 93#define MIN_DMA_LEN 128 94 95/* 96 * New-style autoconfig attachment 97 */ 98 99static int sunsc_mbmem_match(device_t, cfdata_t, void *); 100static void sunsc_mbmem_attach(device_t, device_t, void *); 101static int sunsc_mbmem_intr(void *); 102 103CFATTACH_DECL_NEW(sc_mbmem, sizeof(struct sunscpal_softc), 104 sunsc_mbmem_match, sunsc_mbmem_attach, NULL, NULL); 105 106/* 107 * Options for parity, DMA, and interrupts. 108 */ 109int sunsc_mbmem_options = 0x00; 110 111static int 112sunsc_mbmem_match(device_t parent, cfdata_t cf, void *aux) 113{ 114 struct mbmem_attach_args *mbma = aux; 115 bus_space_handle_t bh; 116 bool matched; 117 118 /* No default Multibus address. */ 119 if (mbma->mbma_paddr == -1) 120 return 0; 121 122 /* Make sure there is something there... */ 123 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ, 124 0, &bh)) 125 return 0; 126 matched = 127 (bus_space_peek_2(mbma->mbma_bustag, bh, SCREG_ICR, NULL) == 0); 128 bus_space_unmap(mbma->mbma_bustag, bh, SCREG_BANK_SZ); 129 if (!matched) 130 return 0; 131 132 /* Default interrupt priority. */ 133 if (mbma->mbma_pri == -1) 134 mbma->mbma_pri = 2; 135 136 return 1; 137} 138 139static void 140sunsc_mbmem_attach(device_t parent, device_t self, void *args) 141{ 142 struct sunscpal_softc *sc = device_private(self); 143 struct cfdata *cf = device_cfdata(self); 144 struct mbmem_attach_args *mbma = args; 145 int i; 146 147 sc->sc_dev = self; 148 149 /* Map in the device. */ 150 sc->sunscpal_regt = mbma->mbma_bustag; 151 sc->sunscpal_dmat = mbma->mbma_dmatag; 152 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ, 153 0, &sc->sunscpal_regh)) 154 panic("%s: can't map", __func__); 155 156 /* Device register offsets. */ 157 sc->sunscpal_data = SCREG_DATA; 158 sc->sunscpal_cmd_stat = SCREG_CMD_STAT; 159 sc->sunscpal_icr = SCREG_ICR; 160 sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H; 161 sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L; 162 sc->sunscpal_dma_count = SCREG_DMA_COUNT; 163 sc->sunscpal_intvec = SCREG_INTVEC; 164 165 /* Allocate DMA handles. */ 166 i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle); 167 sc->sc_dma_handles = kmem_zalloc(i, KM_SLEEP); 168 for (i = 0; i < SUNSCPAL_OPENINGS; i++) 169 if (bus_dmamap_create(sc->sunscpal_dmat, SUNSCPAL_MAX_DMA_LEN, 170 1, SUNSCPAL_MAX_DMA_LEN, 171 0, BUS_DMA_WAITOK, &sc->sc_dma_handles[i].dh_dmamap) != 0) 172 panic("sc: DMA map create failed"); 173 174 /* Miscellaneous. */ 175 sc->sc_min_dma_len = MIN_DMA_LEN; 176 sc->sc_rev = SUNSCPAL_VARIANT_501_1006; 177 178 /* Attach interrupt handler. */ 179 bus_intr_establish(mbma->mbma_bustag, mbma->mbma_pri, IPL_BIO, 0, 180 sunsc_mbmem_intr, sc); 181 182 /* Do the common attach stuff. */ 183 sunscpal_attach(sc, cf->cf_flags ? cf->cf_flags : sunsc_mbmem_options); 184} 185 186static int 187sunsc_mbmem_intr(void *arg) 188{ 189 struct sunscpal_softc *sc = arg; 190 int claimed; 191 192 claimed = sunscpal_intr(sc); 193#ifdef DEBUG 194 if (claimed == 0) { 195 printf("%s: spurious from SBC\n", __func__); 196 } 197#endif 198 /* Yes, we DID cause this interrupt. */ 199 claimed = 1; 200 201 return claimed; 202} 203