diff options
Diffstat (limited to 'sys/alpha/tc/tcds_dma.c')
| -rw-r--r-- | sys/alpha/tc/tcds_dma.c | 285 |
1 files changed, 0 insertions, 285 deletions
diff --git a/sys/alpha/tc/tcds_dma.c b/sys/alpha/tc/tcds_dma.c deleted file mode 100644 index cab19b4..0000000 --- a/sys/alpha/tc/tcds_dma.c +++ /dev/null @@ -1,285 +0,0 @@ -/* $FreeBSD$ */ -/* $NetBSD: tcds_dma.c,v 1.6.4.1 1996/09/10 17:28:19 cgd Exp $ */ - -/* - * Copyright (c) 1994 Peter Galbavy. All rights reserved. - * - * 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. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Peter Galbavy. - * 4. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/kernel.h> -#include <sys/module.h> -#include <sys/bus.h> - -#include <sys/errno.h> -#include <sys/malloc.h> -#include <sys/bio.h> -#include <sys/buf.h> -#include <sys/proc.h> -#include <machine/clock.h> - -#include <scsi/scsi_all.h> -#include <scsi/scsiconf.h> - -#include <vm/vm.h> -#include <vm/vm_extern.h> -#include <vm/pmap.h> -#include <alpha/tc/tcreg.h> -#include <alpha/tc/tcvar.h> -#include <alpha/tc/tcdsreg.h> -#include <alpha/tc/tcdsvar.h> -#include <alpha/tc/espreg.h> -#include <alpha/tc/espvar.h> - -void -tcds_dma_reset(sc) - struct tcds_slotconfig *sc; -{ - /* TCDS SCSI disable/reset/enable. */ - tcds_scsi_reset(sc); /* XXX */ - - sc->sc_active = 0; /* and of course we aren't */ -} - -int -tcds_dma_isintr(sc) - struct tcds_slotconfig *sc; -{ - int x; - - x = tcds_scsi_isintr(sc, 0); - - /* Clear the TCDS interrupt bit. */ - (void)tcds_scsi_isintr(sc, 1); - - /* XXX */ - return x; -} - -/* - * Pseudo (chained) interrupt from the esp driver to kick the - * current running DMA transfer. I am replying on espintr() to - * pickup and clean errors for now - * - * return 1 if it was a DMA continue. - */ -int -tcds_dma_intr(sc) - struct tcds_slotconfig *sc; -{ - u_int32_t dud; - int trans = 0, resid = 0; - u_int32_t *addr, dudmask; - u_char tcl, tcm, tch; - - ESP_DMA(("tcds_dma %d: intr", sc->sc_slot)); - - if (tcds_scsi_iserr(sc)) - return (0); - - /* This is an "assertion" :) */ - if (sc->sc_active == 0) - panic("dmaintr: DMA wasn't active"); - - /* DMA has stopped */ - tcds_dma_enable(sc, 0); - sc->sc_active = 0; - - if (sc->sc_dmasize == 0) { - /* A "Transfer Pad" operation completed */ - tcl = ESP_READ_REG(sc->sc_esp, ESP_TCL); - tcm = ESP_READ_REG(sc->sc_esp, ESP_TCM); - ESP_DMA(("dmaintr: discarded %d bytes (tcl=%d, tcm=%d)\n", - tcl | (tcm << 8), tcl, tcm)); - return 0; - } - - if (!sc->sc_iswrite && - (resid = (ESP_READ_REG(sc->sc_esp, ESP_FFLAG) & ESPFIFO_FF)) != 0) { - printf("empty FIFO of %d ", resid); - ESPCMD(sc->sc_esp, ESPCMD_FLUSH); - DELAY(1); - } - - resid += (tcl = ESP_READ_REG(sc->sc_esp, ESP_TCL)); - resid += (tcm = ESP_READ_REG(sc->sc_esp, ESP_TCM)) << 8; - if (sc->sc_esp->sc_rev == ESP200) - resid += (tch = ESP_READ_REG(sc->sc_esp, ESP_TCH)) << 16; - else - tch = 0; - - if (resid == 0 && (sc->sc_esp->sc_rev <= ESP100A) && - (sc->sc_esp->sc_espstat & ESPSTAT_TC) == 0) - resid = 65536; - - trans = sc->sc_dmasize - resid; - if (trans < 0) { /* transferred < 0 ? */ - printf("tcds_dma %d: xfer (%d) > req (%d)\n", - sc->sc_slot, trans, sc->sc_dmasize); - trans = sc->sc_dmasize; - } - - ESP_DMA(("dmaintr: tcl=%d, tcm=%d, tch=%d; trans=%d, resid=%d\n", - tcl, tcm, tch, trans, resid)); - - /* - * Clean up unaligned DMAs into main memory. - */ - if (sc->sc_iswrite) { - /* Handle unaligned starting address, length. */ - dud = *sc->sc_dud0; - if ((dud & TCDS_DUD0_VALIDBITS) != 0) { - addr = (u_int32_t *) - ((vm_offset_t)sc->sc_dmaaddr & ~0x3); - dudmask = 0; - if (dud & TCDS_DUD0_VALID00) - panic("tcds_dma: dud0 byte 0 valid"); - if (dud & TCDS_DUD0_VALID01) - dudmask |= TCDS_DUD_BYTE01; - if (dud & TCDS_DUD0_VALID10) - dudmask |= TCDS_DUD_BYTE10; -#ifdef DIAGNOSTIC - if (dud & TCDS_DUD0_VALID11) - dudmask |= TCDS_DUD_BYTE11; -#endif - ESP_DMA(("dud0 at 0x%lx dudmask 0x%x\n", - addr, dudmask)); - addr = (u_int32_t *)ALPHA_PHYS_TO_K0SEG((vm_offset_t)addr); - *addr = (*addr & ~dudmask) | (dud & dudmask); - } - dud = *sc->sc_dud1; - if ((dud & TCDS_DUD1_VALIDBITS) != 0) { - - addr = (u_int32_t *) - ((vm_offset_t)*sc->sc_sda << 2); - dudmask = 0; - if (dud & TCDS_DUD1_VALID00) - dudmask |= TCDS_DUD_BYTE00; - if (dud & TCDS_DUD1_VALID01) - dudmask |= TCDS_DUD_BYTE01; - if (dud & TCDS_DUD1_VALID10) - dudmask |= TCDS_DUD_BYTE10; -#ifdef DIAGNOSTIC - if (dud & TCDS_DUD1_VALID11) - panic("tcds_dma: dud1 byte 3 valid"); -#endif - ESP_DMA(("dud1 at 0x%lx dudmask 0x%x\n", - addr, dudmask)); - addr = (u_int32_t *)ALPHA_PHYS_TO_K0SEG((vm_offset_t)addr); - *addr = (*addr & ~dudmask) | (dud & dudmask); - } - /* XXX deal with saved residual byte? */ - } - - *sc->sc_dmalen -= trans; - *sc->sc_dmaaddr += trans; - -#if 0 /* this is not normal operation just yet */ - if (*sc->sc_dmalen == 0 || - sc->sc_esp->sc_phase != sc->sc_esp->sc_prevphase) - return 0; - - /* and again */ - dma_start(sc, sc->sc_dmaaddr, sc->sc_dmalen, sc->sc_iswrite); - return 1; -#endif - return 0; -} - -#define DMAMAX(a) (0x02000 - ((a) & 0x1fff)) - -/* - * start a dma transfer or keep it going - */ - -int -tcds_dma_setup(sc, addr, len, datain, dmasize) - struct tcds_slotconfig *sc; - caddr_t *addr; - size_t *len, *dmasize; - int datain; /* DMA into main memory */ -{ - u_int32_t dic; - size_t size; - - sc->sc_dmaaddr = addr; - sc->sc_dmalen = len; - sc->sc_iswrite = datain; - - ESP_DMA(("tcds_dma %d: start %d@0x%lx,%d\n", sc->sc_slot, *sc->sc_dmalen, *sc->sc_dmaaddr, sc->sc_iswrite)); - - /* - * the rules say we cannot transfer more than the limit - * of this DMA chip (64k) and we cannot cross a 8k boundary. - */ - - size = min(*dmasize, DMAMAX((size_t) *sc->sc_dmaaddr)); - *dmasize = sc->sc_dmasize = size; - - ESP_DMA(("dma_start: dmasize = %d\n", sc->sc_dmasize)); - - /* Load address, set/clear unaligned transfer and read/write bits. */ - /* XXX PICK AN ADDRESS TYPE, AND STICK TO IT! */ - if ((u_long)*addr > avail_end) { - *sc->sc_sda = pmap_kextract((u_long)*addr) >> 2; - } else { - *sc->sc_sda = ALPHA_K0SEG_TO_PHYS((u_long)*addr) >> 2; - } - alpha_mb(); - dic = *sc->sc_dic; - dic &= ~TCDS_DIC_ADDRMASK; - dic |= (vm_offset_t)*addr & TCDS_DIC_ADDRMASK; - if (datain) - dic |= TCDS_DIC_WRITE; - else - dic &= ~TCDS_DIC_WRITE; - *sc->sc_dic = dic; - alpha_mb(); - - return (0); -} - -void -tcds_dma_go(sc) - struct tcds_slotconfig *sc; -{ - - /* mark unit as DMA-active */ - sc->sc_active = 1; - - /* Start DMA */ - tcds_dma_enable(sc, 1); -} - -int -tcds_dma_isactive(sc) - struct tcds_slotconfig *sc; -{ - - return (sc->sc_active); -} |
