Home | History | Annotate | Line # | Download | only in dev
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