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| author | cem <cem@FreeBSD.org> | 2015-10-15 23:45:43 +0000 |
|---|---|---|
| committer | cem <cem@FreeBSD.org> | 2015-10-15 23:45:43 +0000 |
| commit | a2d3d01d7af652bb22508e147d58a7be415b5a8b (patch) | |
| tree | 2dcafe146a6868182e1d20c9457126a076c32348 /lib/libc | |
| parent | 8076e3efdfc682559434fcbbc1633099cb891f90 (diff) | |
| download | FreeBSD-src-a2d3d01d7af652bb22508e147d58a7be415b5a8b.zip FreeBSD-src-a2d3d01d7af652bb22508e147d58a7be415b5a8b.tar.gz | |
NTB: Add variable number MW, DB CB support code
This is a follow-up to r289208: "Xeon Errata Workaround."
Add logic to support a variable number of memory windows and doorbell
callbacks. This was added to the Linux driver in the "Xeon Errata
Workaround" commit, but I skipped it because it didn't look neccessary
at the time. It is needed for future Haswell split-BAR support, so
bring it in now.
A new tunable was added for if_ntb, 'hw.ntb.max_num_clients'. By
default, it is set to zero -- infer the number of clients from the
number of memory windows available from the hardware. Any other
positive value can specify a different number of clients, limited by the
number of doorbell callbacks available (4 under MSI-X, or 15 (Xeon) or
34 (SoC) under legacy INTx).
Obtained from: Linux (Dual BSD/GPL driver)
Sponsored by: EMC / Isilon Storage Division
Diffstat (limited to 'lib/libc')
0 files changed, 0 insertions, 0 deletions
