diff options
| author | Bryan O'Sullivan <bos@pathscale.com> | 2007-03-15 14:44:45 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-04-18 20:20:53 -0700 |
| commit | 946db67fbf836af30835d610b914cdde0cf467f8 (patch) | |
| tree | 9a1c5839fceffb3d576fe9b8cd9140e05b0b6abd /drivers/infiniband | |
| parent | a89875fc7e23ec91561bc3742df3bd5d12b376b4 (diff) | |
| download | linux-946db67fbf836af30835d610b914cdde0cf467f8.tar.gz linux-946db67fbf836af30835d610b914cdde0cf467f8.tar.bz2 linux-946db67fbf836af30835d610b914cdde0cf467f8.zip | |
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>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_common.h | 2 | ||||
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_driver.c | 16 |
2 files changed, 18 insertions, 0 deletions
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; |