diff options
| author |   Jon Mason <jon.mason@intel.com> | 2012-11-16 18:52:57 -0700 |
|---|---|---|
| committer | Jon Mason <jon.mason@intel.com> | 2013-09-03 14:48:52 -0700 |
| commit | 113bf1c9f1e035129f8631b032669d6ab36a14dd (patch) | |
| tree | 839e4b16676e07112941bde5cc739e6fbf786942 /drivers/ntb/ntb_regs.h | |
| parent | NTB: Xeon Errata Workaround (diff) | |
| download | linux-dev-113bf1c9f1e035129f8631b032669d6ab36a14dd.tar.xz linux-dev-113bf1c9f1e035129f8631b032669d6ab36a14dd.zip | |
NTB: BWD Link Recovery
The BWD NTB device will drop the link if an error is encountered on the
point-to-point PCI bridge. The link will stay down until all errors are
cleared and the link is re-established. On link down, check to see if
the error is detected, if so do the necessary housekeeping to try and
recover from the error and reestablish the link.
There is a potential race between the 2 NTB devices recovering at the
same time. If the times are synchronized, the link will not recover and the
driver will be stuck in this loop forever. Add a random interval to the
recovery time to prevent this race.
Signed-off-by: Jon Mason <jon.mason@intel.com>
Diffstat (limited to 'drivers/ntb/ntb_regs.h')
| -rw-r--r-- | drivers/ntb/ntb_regs.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/ntb/ntb_regs.h b/drivers/ntb/ntb_regs.h index 4ddc590d03a6..03a66ef32a68 100644 --- a/drivers/ntb/ntb_regs.h +++ b/drivers/ntb/ntb_regs.h @@ -115,6 +115,7 @@ #define BWD_MBAR45_OFFSET 0xb020 #define BWD_DEVCTRL_OFFSET 0xb048 #define BWD_LINK_STATUS_OFFSET 0xb052 +#define BWD_ERRCORSTS_OFFSET 0xb110 #define BWD_SBAR2XLAT_OFFSET 0x0008 #define BWD_SBAR4XLAT_OFFSET 0x0010 @@ -132,6 +133,20 @@ #define BWD_B2B_SPADSEMA_OFFSET 0x80c0 #define BWD_B2B_STKYSPAD_OFFSET 0x80c4 +#define BWD_MODPHY_PCSREG4 0x1c004 +#define BWD_MODPHY_PCSREG6 0x1c006 + +#define BWD_IP_BASE 0xC000 +#define BWD_DESKEWSTS_OFFSET (BWD_IP_BASE + 0x3024) +#define BWD_LTSSMERRSTS0_OFFSET (BWD_IP_BASE + 0x3180) +#define BWD_LTSSMSTATEJMP_OFFSET (BWD_IP_BASE + 0x3040) +#define BWD_IBSTERRRCRVSTS0_OFFSET (BWD_IP_BASE + 0x3324) + +#define BWD_DESKEWSTS_DBERR (1 << 15) +#define BWD_LTSSMERRSTS0_UNEXPECTEDEI (1 << 20) +#define BWD_LTSSMSTATEJMP_FORCEDETECT (1 << 2) +#define BWD_IBIST_ERR_OFLOW 0x7FFF7FFF + #define NTB_CNTL_BAR23_SNOOP (1 << 2) #define NTB_CNTL_BAR45_SNOOP (1 << 6) #define BWD_CNTL_LINK_DOWN (1 << 16) |