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Subject[PATCH 01 of 33] IB/ipath - add ability to set and clear IB local loopback
Date
From
# HG changeset patch
# User Bryan O'Sullivan <bos@pathscale.com>
# Date 1173994464 25200
# Node ID b1d05f3486f8bba1dd3c5cbca39f06a5e1b3d6fb
# Parent 0d37971d4ab0c8b6f7a8f6e8222112321982498f
IB/ipath - add ability to set and clear IB local loopback

This is a sticky state. It is useful for diagnosing problems with boards
versus cable/switch problems.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>

diff -r 0d37971d4ab0 -r b1d05f3486f8 drivers/infiniband/hw/ipath/ipath_common.h
--- a/drivers/infiniband/hw/ipath/ipath_common.h Wed Mar 14 17:53:43 2007 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_common.h Thu Mar 15 14:34:24 2007 -0700
@@ -78,6 +78,8 @@
#define IPATH_IB_LINKINIT 3
#define IPATH_IB_LINKDOWN_SLEEP 4
#define IPATH_IB_LINKDOWN_DISABLE 5
+#define IPATH_IB_LINK_LOOPBACK 6 /* enable local loopback */
+#define IPATH_IB_LINK_EXTERNAL 7 /* normal, disable local loopback */

/*
* stats maintained by the driver. For now, at least, this is global
diff -r 0d37971d4ab0 -r b1d05f3486f8 drivers/infiniband/hw/ipath/ipath_driver.c
--- a/drivers/infiniband/hw/ipath/ipath_driver.c Wed Mar 14 17:53:43 2007 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_driver.c Thu Mar 15 14:34:24 2007 -0700
@@ -1662,6 +1662,22 @@ int ipath_set_linkstate(struct ipath_dev
lstate = IPATH_LINKACTIVE;
break;

+ case IPATH_IB_LINK_LOOPBACK:
+ dev_info(&dd->pcidev->dev, "Enabling IB local loopback\n");
+ dd->ipath_ibcctrl |= INFINIPATH_IBCC_LOOPBACK;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
+ dd->ipath_ibcctrl);
+ ret = 0;
+ goto bail; // no state change to wait for
+
+ case IPATH_IB_LINK_EXTERNAL:
+ dev_info(&dd->pcidev->dev, "Disabling IB local loopback (normal)\n");
+ dd->ipath_ibcctrl &= ~INFINIPATH_IBCC_LOOPBACK;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
+ dd->ipath_ibcctrl);
+ ret = 0;
+ goto bail; // no state change to wait for
+
default:
ipath_dbg("Invalid linkstate 0x%x requested\n", newstate);
ret = -EINVAL;
-
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