mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2025-01-12 14:29:28 +00:00
Code Issues Releases Activity

Fix problem with early revision 53c825a and 53c875 chips, which

Browse Source 
could cause a solid system lockup in the driver attach:

These chips do not abort an access to the internal SRAM, when
the driver set the software reset bit in the istat register. But
the chip will never acknowledge the requested PCI bus transfer
in the situation, causing an infinite wait and a lockout of other
bus-masters.

The problem has been reported for rev 0x11 of the 53c825a and
rev 0x01 of the 53c875.
Revisions 0x13 of the 53c825a and 0x03 of the 53c875 are known
to support SRAM accesses, even in the software reset state.
This commit is contained in:
Stefan Eßer 1997-08-31 19:35:52 +00:00
parent d6b01f404d
commit 71b8fb2a93
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=28958
1 changed files with 3 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
sys/pci/ncr.c
View File

@ -1,6 +1,6 @@
/**************************************************************************
**
** $Id: ncr.c,v 1.104 1997/08/23 21:53:47 se Exp $
** $Id: ncr.c,v 1.105 1997/08/23 22:01:49 se Exp $
**
** Device driver for the NCR 53C810 PCI-SCSI-Controller.
**
@ -1340,7 +1340,7 @@ static void ncr_attach (pcici_t tag, int unit);
static char ident[] =
"\n$Id: ncr.c,v 1.104 1997/08/23 21:53:47 se Exp $\n";
"\n$Id: ncr.c,v 1.105 1997/08/23 22:01:49 se Exp $\n";
static const u_long ncr_version = NCR_VERSION * 11
+ (u_long) sizeof (struct ncb) * 7
@ -3320,9 +3320,6 @@ static ncr_chip ncr_chip_table[] = {
FE_WIDE|FE_ERL|FE_BOF}
,
{NCR_825_ID, 0x10, "ncr 53c825a fast10 wide scsi", 7, 8, 4,
FE_WIDE|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN/*|FE_RAM*/}
,
{NCR_825_ID, 0x13, "ncr 53c825a fast10 wide scsi", 7, 8, 4,
FE_WIDE|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
,
{NCR_860_ID, 0x00, "ncr 53c860 fast20 scsi", 4, 8, 5,
@ -4901,6 +4898,7 @@ void ncr_init (ncb_p np, char * msg, u_long code)
OUTB (nc_istat, SRST);
DELAY (1000);
OUTB (nc_istat, 0);
/*
** Message.