Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
IB/mlx4: Allow 4K messages for UD QPs
Current code limits the max message size to 2K for UD QPs, while MTU
might be as big as 4K. This patch sets the maximum message size to
4K, which is needed for UD to work correctly on fabrics with a 4K MTU.
Signed-off-by: Alex Naslednikov <xalex@mellanox.co.il>
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
authored by Alex Naslednikov and committed by Roland Dreier 6e0d733d f780a9f1
+1
-1
drivers/infiniband/hw/mlx4/qp.c
+1
-1
drivers/infiniband/hw/mlx4/qp.c
···
902
context->mtu_msgmax = (IB_MTU_4096 << 5) |
903
ilog2(dev->dev->caps.max_gso_sz);
904
else
905
-
context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
906
} else if (attr_mask & IB_QP_PATH_MTU) {
907
if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
908
printk(KERN_ERR "path MTU (%u) is invalid\n",
···
902
context->mtu_msgmax = (IB_MTU_4096 << 5) |
903
ilog2(dev->dev->caps.max_gso_sz);
904
else
905
+
context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
906
} else if (attr_mask & IB_QP_PATH_MTU) {
907
if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
908
printk(KERN_ERR "path MTU (%u) is invalid\n",