This is a note to let you know that I've just added the patch titled
IB/mlx5: Set correct SL in completion for RoCE
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ib-mlx5-set-correct-sl-in-completion-for-roce.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Mar 22 14:40:23 CET 2018
From: Moni Shoua <monis@xxxxxxxxxxxx>
Date: Thu, 20 Apr 2017 13:26:54 +0300
Subject: IB/mlx5: Set correct SL in completion for RoCE
From: Moni Shoua <monis@xxxxxxxxxxxx>
[ Upstream commit 12f8fedef2ec94c783f929126b20440a01512c14 ]
There is a difference when parsing a completion entry between Ethernet
and IB ports. When link layer is Ethernet the bits describe the type of
L3 header in the packet. In the case when link layer is Ethernet and VLAN
header is present the value of SL is equal to the 3 UP bits in the VLAN
header. If VLAN header is not present then the SL is undefined and consumer
of the completion should check if IB_WC_WITH_VLAN is set.
While that, this patch also fills the vlan_id field in the completion if
present.
Signed-off-by: Moni Shoua <monis@xxxxxxxxxxxx>
Reviewed-by: Majd Dibbiny <majd@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/cq.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -172,6 +172,8 @@ static void handle_responder(struct ib_w
struct mlx5_ib_srq *srq;
struct mlx5_ib_wq *wq;
u16 wqe_ctr;
+ u8 roce_packet_type;
+ bool vlan_present;
u8 g;
if (qp->ibqp.srq || qp->ibqp.xrcd) {
@@ -223,7 +225,6 @@ static void handle_responder(struct ib_w
break;
}
wc->slid = be16_to_cpu(cqe->slid);
- wc->sl = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0xf;
wc->src_qp = be32_to_cpu(cqe->flags_rqpn) & 0xffffff;
wc->dlid_path_bits = cqe->ml_path;
g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3;
@@ -237,10 +238,22 @@ static void handle_responder(struct ib_w
wc->pkey_index = 0;
}
- if (ll != IB_LINK_LAYER_ETHERNET)
+ if (ll != IB_LINK_LAYER_ETHERNET) {
+ wc->sl = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0xf;
return;
+ }
+
+ vlan_present = cqe->l4_l3_hdr_type & 0x1;
+ roce_packet_type = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0x3;
+ if (vlan_present) {
+ wc->vlan_id = (be16_to_cpu(cqe->vlan_info)) & 0xfff;
+ wc->sl = (be16_to_cpu(cqe->vlan_info) >> 13) & 0x7;
+ wc->wc_flags |= IB_WC_WITH_VLAN;
+ } else {
+ wc->sl = 0;
+ }
- switch (wc->sl & 0x3) {
+ switch (roce_packet_type) {
case MLX5_CQE_ROCE_L3_HEADER_TYPE_GRH:
wc->network_hdr_type = RDMA_NETWORK_IB;
break;
Patches currently in stable-queue which might be from monis@xxxxxxxxxxxx are
queue-4.9/ib-mlx5-set-correct-sl-in-completion-for-roce.patch
queue-4.9/ib-rxe-don-t-clamp-residual-length-to-mtu.patch