From 946db67fbf836af30835d610b914cdde0cf467f8 Mon Sep 17 00:00:00 2001 From: Bryan O'Sullivan Date: Thu, 15 Mar 2007 14:44:45 -0700 Subject: [PATCH] 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 Signed-off-by: Bryan O'Sullivan Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ipath/ipath_common.h | 2 ++ drivers/infiniband/hw/ipath/ipath_driver.c | 16 ++++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/infiniband/hw/ipath/ipath_common.h b/drivers/infiniband/hw/ipath/ipath_common.h index 54139d398181..a41367803529 100644 --- a/drivers/infiniband/hw/ipath/ipath_common.h +++ b/drivers/infiniband/hw/ipath/ipath_common.h @@ -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 --git a/drivers/infiniband/hw/ipath/ipath_driver.c b/drivers/infiniband/hw/ipath/ipath_driver.c index ae7f21a0cdc0..c2fe5417ff45 100644 --- a/drivers/infiniband/hw/ipath/ipath_driver.c +++ b/drivers/infiniband/hw/ipath/ipath_driver.c @@ -1662,6 +1662,22 @@ int ipath_set_linkstate(struct ipath_devdata *dd, u8 newstate) 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; -- 2.39.5