Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

- Take care of dm_segs[].dm_len value whenever the offset is adjusted. 

Known not working well for 4MAX+ this moment.
- White spacing.
This commit is contained in:
nisimura 2000-06-07 10:09:19 +00:00
parent a67130a218
commit 4250cdde36
1 changed files with 53 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

121
sys/arch/pmax/tc/asc_ioasic.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: asc_ioasic.c,v 1.8 2000/06/05 07:59:52 nisimura Exp $ */
/* $NetBSD: asc_ioasic.c,v 1.9 2000/06/07 10:09:19 nisimura Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: asc_ioasic.c,v 1.8 2000/06/05 07:59:52 nisimura Exp $");
__KERNEL_RCSID(0, "$NetBSD: asc_ioasic.c,v 1.9 2000/06/07 10:09:19 nisimura Exp $");
#include <sys/types.h>
#include <sys/param.h>
@ -224,18 +224,17 @@ asc_ioasic_setup(sc, addr, len, ispullup, dmasize)
u_int32_t ssr, scr, *p;
size_t size;
vaddr_t cp;
paddr_t ptr0, ptr1;
NCR_DMA(("%s: start %d@%p,%s\n", sc->sc_dev.dv_xname,
NCR_DMA(("%s: start %d@%p,%s\n", sc->sc_dev.dv_xname,
*asc->sc_dmalen, *asc->sc_dmaaddr, ispullup ? "IN" : "OUT"));
/* upto two 4KB pages */
size = min(*dmasize, TWOPAGE((size_t)*addr));
asc->sc_dmaaddr = addr;
asc->sc_dmalen = len;
asc->sc_dmasize = size;
asc->sc_flags = (ispullup) ? ASC_ISPULLUP : 0;
*dmasize = size; /* return trimmed transfer size */
size = min(*dmasize, TWOPAGE((size_t)*addr));
asc->sc_dmaaddr = addr;
asc->sc_dmalen = len;
asc->sc_dmasize = size;
asc->sc_flags = (ispullup) ? ASC_ISPULLUP : 0;
*dmasize = size; /* return trimmed transfer size */
/* stop DMA engine first */
ssr = bus_space_read_4(asc->sc_bst, asc->sc_bsh, IOASIC_CSR);
@ -248,47 +247,46 @@ asc_ioasic_setup(sc, addr, len, ispullup, dmasize)
NULL /* kernel address */, BUS_DMA_NOWAIT))
panic("%s: cannot allocate DMA address", sc->sc_dev.dv_xname);
/* take care of 8B constraint on starting address */
cp = (vaddr_t)*addr;
if ((cp & 7) == 0) {
/* comfortably aligned to 8B boundary */
bus_space_write_4(asc->sc_bst, asc->sc_bsh, IOASIC_SCSI_SCR, 0);
}
else {
/* truncate to the boundary */
p = (u_int32_t *)(cp & ~7);
/* how many 16bit quantities in subject */
scr = (cp >> 1) & 3;
/* trim down physical address too */
asc->sc_dmamap->dm_segs[0].ds_addr &= ~7;
if ((asc->sc_flags & ASC_ISPULLUP) == 0) {
/* take care of 8B constraint on starting address */
cp = (vaddr_t)*addr;
if ((cp & 7) == 0) {
/* comfortably aligned to 8B boundary */
scr = 0;
}
else {
/* truncate to the boundary */
p = (u_int32_t *)(cp & ~7);
/* how many 16bit quantities in subject */
scr = (cp & 7) >> 1;
/* trim down physical address too */
asc->sc_dmamap->dm_segs[0].ds_addr &= ~7;
asc->sc_dmamap->dm_segs[0].ds_len += (cp & 6);
if ((asc->sc_flags & ASC_ISPULLUP) == 0) {
/* push down to SCSI device */
scr |= 4;
/* round up physical address in this case */
asc->sc_dmamap->dm_segs[0].ds_addr += 8;
}
/* pack fixup data in SDR0/SDR1 pair and instruct SCR */
bus_space_write_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_SDR0, p[0]);
bus_space_write_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_SDR1, p[1]);
bus_space_write_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_SCR, scr);
}
ptr0 = asc->sc_dmamap->dm_segs[0].ds_addr;
ptr1 = (asc->sc_dmamap->dm_nsegs > 1)
? asc->sc_dmamap->dm_segs[1].ds_addr : ~0;
bus_space_write_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_DMAPTR,
IOASIC_DMA_ADDR(ptr0));
bus_space_write_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_NEXTPTR,
IOASIC_DMA_ADDR(ptr1));
scr |= 4;
/* round up physical address in this case */
asc->sc_dmamap->dm_segs[0].ds_addr += 8;
/* don't care excess cache flush */
}
/* pack fixup data in SDR0/SDR1 pair and instruct SCR */
bus_space_write_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_SDR0, p[0]);
bus_space_write_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_SDR1, p[1]);
}
bus_space_write_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_DMAPTR,
IOASIC_DMA_ADDR(asc->sc_dmamap->dm_segs[0].ds_addr));
bus_space_write_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_NEXTPTR,
(asc->sc_dmamap->dm_nsegs == 1)
? ~0 : IOASIC_DMA_ADDR(asc->sc_dmamap->dm_segs[1].ds_addr));
bus_space_write_4(asc->sc_bst, asc->sc_bsh, IOASIC_SCSI_SCR, scr);
/* synchronize dmamap contents with memory image */
bus_dmamap_sync(asc->sc_dmat, asc->sc_dmamap,
bus_dmamap_sync(asc->sc_dmat, asc->sc_dmamap,
0, size,
(ispullup) ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
(ispullup) ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
asc->sc_flags |= ASC_MAPLOADED;
return 0;
@ -315,8 +313,6 @@ asc_ioasic_go(sc)
asc->sc_flags |= ASC_DMAACTIVE;
}
#define SCRDEBUG(x)
static int
asc_ioasic_intr(sc)
struct ncr53c9x_softc *sc;
@ -385,33 +381,22 @@ asc_ioasic_intr(sc)
scr = bus_space_read_4(asc->sc_bst, asc->sc_bsh, IOASIC_SCSI_SCR);
if ((asc->sc_flags & ASC_ISPULLUP) && scr != 0) {
u_int32_t ptr;
u_int16_t *p;
union {
u_int32_t sdr[2];
u_int16_t half[4];
} scratch;
scratch.sdr[0] = bus_space_read_4(asc->sc_bst, asc->sc_bsh,
u_int32_t sdr[2], ptr;
sdr[0] = bus_space_read_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_SDR0);
scratch.sdr[1] = bus_space_read_4(asc->sc_bst, asc->sc_bsh,
sdr[1] = bus_space_read_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_SDR1);
ptr = bus_space_read_4(asc->sc_bst, asc->sc_bsh,
IOASIC_SCSI_DMAPTR);
ptr = (ptr >> 3) & 0x1ffffffc;
SCRDEBUG(("SCSI_SCR -> %x, DMAPTR: %p\n", scr, (void *)ptr));
p = (u_int16_t *)MIPS_PHYS_TO_KSEG0(ptr);
/*
* scr
* 1 -> half[0]
* 2 -> half[0] + half[1]
* 3 -> half[0] + half[1] + half[2]
* scr: 1 -> short[0]
* 2 -> short[0] + short[1]
* 3 -> short[0] + short[1] + short[2]
*/
scr &= IOASIC_SCR_WORD;
p[0] = scratch.half[0];
if (scr > 1)
p[1] = scratch.half[1];
if (scr > 2)
p[2] = scratch.half[2];
memcpy((void *)MIPS_PHYS_TO_KSEG0(ptr), sdr, scr << 1);
}
bus_dmamap_unload(asc->sc_dmat, asc->sc_dmamap);