d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix this so that it can cope with transfers to/from regions which are not

Browse Source 
physically contiguous.
This commit is contained in:
Doug Rabson 2000-10-12 14:29:24 +00:00
parent c332b0bc57
commit 8034cac98a
1 changed files with 22 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
sys/ia64/ia64/sscdisk.c
View File

@ -159,6 +159,7 @@ sscstrategy(struct bio *bp)
unsigned sscop = 0;
struct disk_req req;
struct disk_stat stat;
u_long len, va, off;
if (ssc_debug > 1)
printf("sscstrategy(%p) %s %x, %d, %ld, %p)\n",
@ -197,12 +198,27 @@ sscstrategy(struct bio *bp)
dop = DEVSTAT_WRITE;
sscop = SSC_WRITE;
}
req.len = bp->bio_bcount;
req.addr = (long) vtophys(bp->bio_data);
ssc(sc->fd, 1, ia64_tpa((long) &req),
(bp->bio_pblkno << DEV_BSHIFT), sscop);
stat.fd = sc->fd;
ssc(ia64_tpa((long)&stat), 0, 0, 0, SSC_WAIT_COMPLETION);
va = (u_long) bp->bio_data;
len = bp->bio_bcount;
off = bp->bio_pblkno << DEV_BSHIFT;
while (len > 0) {
u_int t;
if ((va & PAGE_MASK) + len > PAGE_SIZE)
t = PAGE_SIZE - (va & PAGE_MASK);
else
t = len;
req.len = t;
req.addr = ia64_tpa(va);
printf("sscstrategy: reading %ld bytes from 0x%ld into 0x%lx\n",
req.len, off, req.addr);
ssc(sc->fd, 1, ia64_tpa((long) &req), off, sscop);
stat.fd = sc->fd;
ssc(ia64_tpa((long)&stat), 0, 0, 0,
SSC_WAIT_COMPLETION);
va += t;
len -= t;
off += t;
}
bp->bio_resid = 0;
devstat_end_transaction_bio(&sc->stats, bp);
biodone(bp);