From: Or Gerlitz Date: Sun, 11 Dec 2011 14:40:05 +0000 (+0200) Subject: IB/mlx4: Fix SL to 802.1Q priority-bits mapping for IBoE X-Git-Tag: v3.3-rc1~160^2^3 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9106c410697427363517ca6b4f463698aebc5f25;p=pandora-kernel.git IB/mlx4: Fix SL to 802.1Q priority-bits mapping for IBoE For IBoE, SLs 0-7 are mapped to Ethernet 802.1Q user priority bits (pbits) which are part of the VLAN tag, SLs 8-15 are reserved. Under Ethernet, the ConnectX firmware treats (decode/encode) the four bit SL field in various constructs such as QPC / UD WQE / CQE as PPP0 and not as 0PPP. This correlates well to the fact that within the vlan tag the pbits are located in bits 15-13 and not 12-14. The current code wasn't consistent around that area - the encoding was correct for the IBoE QPC.path.schedule_queue field, but was wrong for IBoE CQEs and when MLX header was built. These inconsistencies resulted in wrong SL <--> wire 802.1Q pbits mapping, which is fixed by using SL <--> PPP0 all around the place. Signed-off-by: Oren Duer Signed-off-by: Or Gerlitz Signed-off-by: Roland Dreier --- Reading git-diff-tree failed