IB/ipath: Improve handling and reporting of parity errors
Mostly cleanup.
Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ipath/ipath_intr.c b/drivers/infiniband/hw/ipath/ipath_intr.c
index 2485331..45d0331 100644
--- a/drivers/infiniband/hw/ipath/ipath_intr.c
+++ b/drivers/infiniband/hw/ipath/ipath_intr.c
@@ -38,10 +38,39 @@
#include "ipath_common.h"
/*
+ * clear (write) a pio buffer, to clear a parity error. This routine
+ * should only be called when in freeze mode, and the buffer should be
+ * canceled afterwards.
+ */
+static void ipath_clrpiobuf(struct ipath_devdata *dd, u32 pnum)
+{
+ u32 __iomem *pbuf;
+ u32 dwcnt; /* dword count to write */
+ if (pnum < dd->ipath_piobcnt2k) {
+ pbuf = (u32 __iomem *) (dd->ipath_pio2kbase + pnum *
+ dd->ipath_palign);
+ dwcnt = dd->ipath_piosize2k >> 2;
+ }
+ else {
+ pbuf = (u32 __iomem *) (dd->ipath_pio4kbase +
+ (pnum - dd->ipath_piobcnt2k) * dd->ipath_4kalign);
+ dwcnt = dd->ipath_piosize4k >> 2;
+ }
+ dev_info(&dd->pcidev->dev,
+ "Rewrite PIO buffer %u, to recover from parity error\n",
+ pnum);
+ *pbuf = dwcnt+1; /* no flush required, since already in freeze */
+ while(--dwcnt)
+ *pbuf++ = 0;
+}
+
+/*
* Called when we might have an error that is specific to a particular
* PIO buffer, and may need to cancel that buffer, so it can be re-used.
+ * If rewrite is true, and bits are set in the sendbufferror registers,
+ * we'll write to the buffer, for error recovery on parity errors.
*/
-void ipath_disarm_senderrbufs(struct ipath_devdata *dd)
+void ipath_disarm_senderrbufs(struct ipath_devdata *dd, int rewrite)
{
u32 piobcnt;
unsigned long sbuf[4];
@@ -74,8 +103,11 @@
}
for (i = 0; i < piobcnt; i++)
- if (test_bit(i, sbuf))
+ if (test_bit(i, sbuf)) {
+ if (rewrite)
+ ipath_clrpiobuf(dd, i);
ipath_disarm_piobufs(dd, i, 1);
+ }
dd->ipath_lastcancel = jiffies+3; /* no armlaunch for a bit */
}
}
@@ -114,7 +146,7 @@
{
u64 ignore_this_time = 0;
- ipath_disarm_senderrbufs(dd);
+ ipath_disarm_senderrbufs(dd, 0);
if ((errs & E_SUM_LINK_PKTERRS) &&
!(dd->ipath_flags & IPATH_LINKACTIVE)) {
/*