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IB/ipath: Workaround problem of errormask register being overwritten

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On some system hardware, we are seeing moderately common cases of the
chip errormask register being overwritten due to a chip bug in iba6120
that is triggered by a vendor-specific PCIe broadcast message.  This
patch merely checks periodically, and corrects it if needed (the
overwrite can cause us to not get error and hardware error
interrupts).  Also, make dd->ipath_errormask the one, true canonical
source for kr_errormask, and remove references to ipath_ignorederrs as
it is currently unused.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: John Gregor <john.gregor@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Dave Olson
2007-07-20 14:41:26 -07:00
committed by Roland Dreier
parent 3810f2a84e
commit 78d1e02fac
4 changed files with 66 additions and 29 deletions
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11
drivers/infiniband/hw/ipath/ipath_kernel.h
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@@ -261,18 +261,10 @@ struct ipath_devdata {
* limiting of hwerror reporting
*/
ipath_err_t ipath_lasthwerror;
/*
* errors masked because they occur too fast, also includes errors
* that are always ignored (ipath_ignorederrs)
*/
/* errors masked because they occur too fast */
ipath_err_t ipath_maskederrs;
/* time in jiffies at which to re-enable maskederrs */
unsigned long ipath_unmasktime;
/*
* errors always ignored (masked), at least for a given
* chip/device, because they are wrong or not useful
*/
ipath_err_t ipath_ignorederrs;
/* count of egrfull errors, combined for all ports */
u64 ipath_last_tidfull;
/* for ipath_qcheck() */
@@ -436,6 +428,7 @@ struct ipath_devdata {
u64 ipath_lastibcstat;
/* hwerrmask shadow */
ipath_err_t ipath_hwerrmask;
ipath_err_t ipath_errormask; /* errormask shadow */
/* interrupt config reg shadow */
u64 ipath_intconfig;
/* kr_sendpiobufbase value */