IB/mlx4: Configure QPs' max message size based on real device capability
ConnectX returns the max message size it supports through the
QUERY_DEV_CAP firmware command. When modifying a QP to RTR, the max
message size for the QP must be specified. This value must not exceed
the value declared through QUERY_DEV_CAP. The current code ignores
the max allowed size and unconditionally sets the value to 2^31. This
patch sets all QPs to the max value allowed as returned from firmware.
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 4b0ac5d..76054a7 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -908,7 +908,8 @@
attr->path_mtu);
goto out;
}
- context->mtu_msgmax = (attr->path_mtu << 5) | 31;
+ context->mtu_msgmax = (attr->path_mtu << 5) |
+ ilog2(dev->dev->caps.max_msg_sz);
}
if (qp->rq.wqe_cnt)