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| author | Jon Mason <jon.mason@intel.com> | 2013-07-16 03:43:54 +0400 |
|---|---|---|
| committer | Jon Mason <jon.mason@intel.com> | 2013-09-05 22:07:58 +0400 |
| commit | ed6c24eda97b6bdcd013dbd91cc5c8b02de507e9 (patch) | |
| tree | 992940462fcdf730a3c93af95dd051b8a543f6ff /drivers/ntb/ntb_transport.c | |
| parent | 497938890a0121d040683aa1db42cad8daf7ae97 (diff) | |
| download | linux-ed6c24eda97b6bdcd013dbd91cc5c8b02de507e9.tar.xz | |
NTB: NTB-RP support
Add support for Non-Transparent Bridge connected to a PCI-E Root Port on
the remote system (also known as NTB-RP mode). This allows for a NTB
enabled system to be connected to a non-NTB enabled system/slot.
Modifications to the registers and BARs/MWs on the Secondary side by the
remote system are reflected into registers on the Primary side for the
local system. Similarly, modifications of registers and BARs/MWs on
Primary side by the local system are reflected into registers on the
Secondary side for the Remote System. This allows communication between
the 2 sides via these registers and BARs/MWs.
Note: there is not a fix for the Xeon Errata (that was already worked
around in NTB-B2B mode) for NTB-RP mode. Due to this limitation, NTB-RP
will not work on the Secondary side with the Xeon Errata workaround
enabled. To get around this, disable the workaround via the
xeon_errata_workaround=0 modparm. However, this can cause the hang
described in the errata.
Signed-off-by: Jon Mason <jon.mason@intel.com>
Diffstat (limited to 'drivers/ntb/ntb_transport.c')
0 files changed, 0 insertions, 0 deletions