diff options
| author | Jon Mason <jon.mason@intel.com> | 2013-09-06 19:51:16 -0400 |
|---|---|---|
| committer | Jon Mason <jon.mason@intel.com> | 2013-11-20 11:57:30 -0500 |
| commit | c529aa30337b928bd6bc34293608cb3d4505856e (patch) | |
| tree | 48cb1e6180ecb243e923f65fa8436a7fa77db8f7 /drivers/ntb/ntb_regs.h | |
| parent | 5e01dc7b26d9f24f39abace5da98ccbd6a5ceb52 (diff) | |
NTB: Xeon Doorbell errata workaround
Modifications to the 14th bit of the B2BDOORBELL register will not be
mirrored to the remote system due to a hardware issue. To get around
the issue, shrink the number of available doorbell bits by 1. The max
number of doorbells was being used as a way to referencing the Link
Doorbell bit. Since this would no longer work, the driver must now
explicitly reference that bit.
This does not affect the xeon_errata_workaround case, as it is not using
the b2bdoorbell register.
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 | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/ntb/ntb_regs.h b/drivers/ntb/ntb_regs.h index aa4bdd393c58..5381b65a6f3a 100644 --- a/drivers/ntb/ntb_regs.h +++ b/drivers/ntb/ntb_regs.h | |||
| @@ -55,6 +55,7 @@ | |||
| 55 | #define SNB_MAX_COMPAT_SPADS 16 | 55 | #define SNB_MAX_COMPAT_SPADS 16 |
| 56 | /* Reserve the uppermost bit for link interrupt */ | 56 | /* Reserve the uppermost bit for link interrupt */ |
| 57 | #define SNB_MAX_DB_BITS 15 | 57 | #define SNB_MAX_DB_BITS 15 |
| 58 | #define SNB_LINK_DB 15 | ||
| 58 | #define SNB_DB_BITS_PER_VEC 5 | 59 | #define SNB_DB_BITS_PER_VEC 5 |
| 59 | #define SNB_MAX_MW 2 | 60 | #define SNB_MAX_MW 2 |
| 60 | #define SNB_ERRATA_MAX_MW 1 | 61 | #define SNB_ERRATA_MAX_MW 1 |