1 /* $NetBSD: sc_mbmem.c,v 1.11 2006/03/29 04:16:48 thorpej 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * This file contains only the machine-dependent parts of the 41 * Sun-2 SCSI driver. (Autoconfig stuff and DMA functions.) 42 * The machine-independent parts are in sunscpal.c 43 * 44 * Supported hardware includes: 45 * Sun SCSI-2 on Multibus (Sun2/120,Sun2/170) 46 * Sun SCSI-2 on VME (Sun2/50,Sun3/160,Sun3/260,others?) 47 * 48 * Credits, history: 49 * 50 * Matthew Fredette took revision 1.15 of si_vme.c, and then heavily 51 * modified it to support the Sun sc. The remaining credits 52 * are from si_vme.c: 53 * 54 * David Jones wrote the initial version of this module, which 55 * included support for the VME adapter only. (no reselection). 56 * 57 * Gordon Ross added support for the OBIO adapter, and re-worked 58 * both the VME and OBIO code to support disconnect/reselect. 59 * (Required figuring out the hardware "features" noted above.) 60 * 61 * The autoconfiguration boilerplate came from Adam Glass. 62 */ 63 64 /***************************************************************** 65 * Multibus functions for sc 66 ****************************************************************/ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: sc_mbmem.c,v 1.11 2006/03/29 04:16:48 thorpej Exp $"); 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/errno.h> 74 #include <sys/kernel.h> 75 #include <sys/malloc.h> 76 #include <sys/device.h> 77 #include <sys/buf.h> 78 #include <sys/proc.h> 79 #include <sys/user.h> 80 81 #include <dev/scsipi/scsi_all.h> 82 #include <dev/scsipi/scsipi_all.h> 83 #include <dev/scsipi/scsipi_debug.h> 84 #include <dev/scsipi/scsiconf.h> 85 86 #include <machine/autoconf.h> 87 #include <machine/bus.h> 88 89 /* #define DEBUG XXX */ 90 91 #include <dev/ic/sunscpalreg.h> 92 #include <dev/ic/sunscpalvar.h> 93 94 /* Yes, we use a VME header file. */ 95 #include <dev/vme/screg.h> 96 97 /* 98 * Transfers smaller than this are done using PIO 99 * (on assumption they're not worth DMA overhead) 100 */ 101 #define MIN_DMA_LEN 128 102 103 /* 104 * New-style autoconfig attachment 105 */ 106 107 static int sunsc_mbmem_match(struct device *, struct cfdata *, void *); 108 static void sunsc_mbmem_attach(struct device *, struct device *, void *); 109 static int sunsc_mbmem_intr(void *); 110 111 CFATTACH_DECL(sc_mbmem, sizeof(struct sunscpal_softc), 112 sunsc_mbmem_match, sunsc_mbmem_attach, NULL, NULL); 113 114 /* 115 * Options for parity, DMA, and interrupts. 116 */ 117 int sunsc_mbmem_options = 0x00; 118 119 static int 120 sunsc_mbmem_match(struct device *parent, struct cfdata *cf, void *aux) 121 { 122 struct mbmem_attach_args *mbma = aux; 123 bus_space_handle_t bh; 124 int matched; 125 126 /* No default Multibus address. */ 127 if (mbma->mbma_paddr == -1) 128 return (0); 129 130 /* Make sure there is something there... */ 131 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ, 132 0, &bh)) 133 return (0); 134 matched = (bus_space_peek_2(mbma->mbma_bustag, bh, SCREG_ICR, NULL) == 0); 135 bus_space_unmap(mbma->mbma_bustag, bh, SCREG_BANK_SZ); 136 if (!matched) 137 return (0); 138 139 /* Default interrupt priority. */ 140 if (mbma->mbma_pri == -1) 141 mbma->mbma_pri = 2; 142 143 return (1); 144 } 145 146 static void 147 sunsc_mbmem_attach(struct device *parent, struct device *self, void *args) 148 { 149 struct sunscpal_softc *sc = (void *) self; 150 struct cfdata *cf = device_cfdata(self); 151 struct mbmem_attach_args *mbma = args; 152 int i; 153 154 /* Map in the device. */ 155 sc->sunscpal_regt = mbma->mbma_bustag; 156 sc->sunscpal_dmat = mbma->mbma_dmatag; 157 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ, 158 0, &sc->sunscpal_regh)) 159 panic("sunsc_mbmem_attach: can't map"); 160 161 /* Device register offsets. */ 162 sc->sunscpal_data = SCREG_DATA; 163 sc->sunscpal_cmd_stat = SCREG_CMD_STAT; 164 sc->sunscpal_icr = SCREG_ICR; 165 sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H; 166 sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L; 167 sc->sunscpal_dma_count = SCREG_DMA_COUNT; 168 sc->sunscpal_intvec = SCREG_INTVEC; 169 170 /* Allocate DMA handles. */ 171 i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle); 172 sc->sc_dma_handles = (sunscpal_dma_handle_t) 173 malloc(i, M_DEVBUF, M_WAITOK); 174 if (sc->sc_dma_handles == NULL) 175 panic("sc: DMA handles malloc failed"); 176 for (i = 0; i < SUNSCPAL_OPENINGS; i++) 177 if (bus_dmamap_create(sc->sunscpal_dmat, SUNSCPAL_MAX_DMA_LEN, 178 1, SUNSCPAL_MAX_DMA_LEN, 179 0, BUS_DMA_WAITOK, &sc->sc_dma_handles[i]. 180 dh_dmamap) != 0) 181 panic("sc: DMA map create failed"); 182 183 /* Miscellaneous. */ 184 sc->sc_min_dma_len = MIN_DMA_LEN; 185 sc->sc_rev = SUNSCPAL_VARIANT_501_1006; 186 187 /* Attach interrupt handler. */ 188 bus_intr_establish(mbma->mbma_bustag, mbma->mbma_pri, IPL_BIO, 0, 189 sunsc_mbmem_intr, sc); 190 191 /* Do the common attach stuff. */ 192 sunscpal_attach(sc, (cf->cf_flags ? cf->cf_flags : sunsc_mbmem_options)); 193 } 194 195 static int 196 sunsc_mbmem_intr(void *arg) 197 { 198 struct sunscpal_softc *sc = arg; 199 int claimed; 200 201 claimed = sunscpal_intr(sc); 202 #ifdef DEBUG 203 if (!claimed) { 204 printf("sunsc_intr: spurious from SBC\n"); 205 } 206 #endif 207 /* Yes, we DID cause this interrupt. */ 208 claimed = 1; 209 210 return (claimed); 211 } 212