/* $NetBSD: sc_vme.c,v 1.19 2023/08/04 14:04:44 rin Exp $ */ /*- * Copyright (c) 1996,2000,2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Adam Glass, David Jones, Gordon W. Ross, Jason R. Thorpe, * Paul Kranenburg, and Matt Fredette. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * This file contains VME bus-dependent of the `sc' SCSI adapter. * This hardware is frequently found on Sun 2, Sun 3, and Sun 4 machines. * * The SCSI machinery on this adapter is implemented by an Sun custom * chipset, which is handled by the chipset driver in /sys/dev/ic/sunscpal.c */ /* * This driver originated as an MD implementation for the `si' VME driver. * The notes pertaining to that history are included below. * * David Jones wrote the initial version of this module for NetBSD/sun3, * which included support for the VME adapter only. (no reselection). * * Gordon Ross added support for the Sun 3 OBIO adapter, and re-worked * both the VME and OBIO code to support disconnect/reselect. * (Required figuring out the hardware "features" noted above.) * * The autoconfiguration boilerplate came from Adam Glass. * * Jason R. Thorpe ported the autoconfiguration and VME portions to * NetBSD/sparc, and added initial support for the 4/100 "SCSI Weird", * a wacky OBIO variant of the VME SCSI-3. Many thanks to Chuck Cranor * for lots of helpful tips and suggestions. Thanks also to Paul Kranenburg * and Chris Torek for bits of insight needed along the way. Thanks to * David Gilbert and Andrew Gillham who risked filesystem life-and-limb * for the sake of testing. Andrew Gillham helped work out the bugs * the 4/100 DMA code. */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: sc_vme.c,v 1.19 2023/08/04 14:04:44 rin Exp $"); #include "opt_ddb.h" #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/kmem.h> #include <sys/errno.h> #include <sys/device.h> #include <sys/buf.h> #include <sys/bus.h> #include <sys/intr.h> #include <dev/vme/vmereg.h> #include <dev/vme/vmevar.h> #include <dev/scsipi/scsi_all.h> #include <dev/scsipi/scsipi_all.h> #include <dev/scsipi/scsipi_debug.h> #include <dev/scsipi/scsiconf.h> #if !defined(DDB) && !defined(Debugger) #define Debugger() #endif #ifndef DEBUG #define DEBUG XXX #endif #include <dev/ic/sunscpalvar.h> #include <dev/vme/screg.h> /* * Transfers smaller than this are done using PIO * (on assumption they're not worth DMA overhead) */ #define MIN_DMA_LEN 128 int sunsc_vme_options = 0; static int sc_vme_match(device_t, cfdata_t, void *); static void sc_vme_attach(device_t, device_t, void *); static int sc_vme_intr(void *); /* Auto-configuration glue. */ CFATTACH_DECL_NEW(sc_vme, sizeof(struct sunscpal_softc), sc_vme_match, sc_vme_attach, NULL, NULL); static int sc_vme_match(device_t parent, cfdata_t cf, void *aux) { struct vme_attach_args *va = aux; vme_chipset_tag_t ct = va->va_vct; vme_am_t mod; vme_addr_t vme_addr; /* Make sure there is something there... */ mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; vme_addr = va->r[0].offset; if (vme_probe(ct, vme_addr, 1, mod, VME_D8, NULL, 0) != 0) return 0; /* * If this is a VME SCSI board, we have to determine whether * it is an "sc" (Sun2) or "si" (Sun3) SCSI board. This can * be determined using the fact that the "sc" board occupies * 4K bytes in VME space but the "si" board occupies 2K bytes. */ return vme_probe(ct, vme_addr + 0x801, 1, mod, VME_D8, NULL, 0) == 0; } static void sc_vme_attach(device_t parent, device_t self, void *aux) { struct sunscpal_softc *sc = device_private(self); struct vme_attach_args *va = aux; vme_chipset_tag_t ct = va->va_vct; bus_space_tag_t bt; bus_space_handle_t bh; vme_mapresc_t resc; vme_intr_handle_t ih; vme_am_t mod; int i; sc->sc_dev = self; sc->sunscpal_dmat = va->va_bdt; mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; if (vme_space_map(ct, va->r[0].offset, SCREG_BANK_SZ, mod, VME_D8, 0, &bt, &bh, &resc) != 0) panic("%s: vme_space_map", device_xname(self)); sc->sunscpal_regt = bt; sc->sunscpal_regh = bh; vme_intr_map(ct, va->ilevel, va->ivector, &ih); vme_intr_establish(ct, ih, IPL_BIO, sc_vme_intr, sc); aprint_normal("\n"); /* * Initialize fields used by the MI code */ /* PAL register bank offsets */ sc->sunscpal_data = SCREG_DATA; sc->sunscpal_cmd_stat = SCREG_CMD_STAT; sc->sunscpal_icr = SCREG_ICR; sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H; sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L; sc->sunscpal_dma_count = SCREG_DMA_COUNT; sc->sunscpal_intvec = SCREG_INTVEC; /* Miscellaneous. */ sc->sc_min_dma_len = MIN_DMA_LEN; sc->sc_rev = SUNSCPAL_VARIANT_501_1045; /* * Allocate DMA handles. */ i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle); sc->sc_dma_handles = kmem_zalloc(i, KM_SLEEP); for (i = 0; i < SUNSCPAL_OPENINGS; i++) { sc->sc_dma_handles[i].dh_flags = 0; /* Allocate a DMA handle */ if (vme_dmamap_create( ct, /* VME chip tag */ SUNSCPAL_MAX_DMA_LEN, /* size */ VME_AM_A24, /* address modifier */ VME_D16, /* data size */ 0, /* swap */ 1, /* nsegments */ SUNSCPAL_MAX_DMA_LEN, /* maxsegsz */ 0, /* boundary */ BUS_DMA_NOWAIT, &sc->sc_dma_handles[i].dh_dmamap) != 0) { aprint_error_dev(self, "DMA buffer map create error\n"); return; } } /* * Set up interrupts on the board. */ SUNSCPAL_WRITE_1(sc, sunscpal_intvec, va->ivector & 0xFF); /* Do the common attach stuff. */ printf("%s", device_xname(self)); sunscpal_attach(sc, (device_cfdata(self)->cf_flags ? device_cfdata(self)->cf_flags : sunsc_vme_options)); } static int sc_vme_intr(void *arg) { struct sunscpal_softc *sc = arg; int claimed; claimed = sunscpal_intr(sc); #ifdef DEBUG if (!claimed) { printf("%s: spurious from SBC\n", __func__); } #endif /* Yes, we DID cause this interrupt. */ claimed = 1; return claimed; }
