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aquantia: Setup max_mtu in ndev to enable jumbo frames

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Although hardware is capable for almost 16K MTU, without max_mtu field
correctly set it only allows standard MTU to be used.
This patch enables max MTU, calculating it from hardware maximum frame size
of 16352 octets (including FCS).

Fixes: 5513e16421 ("net: ethernet: aquantia: Fixes for aq_ndev_change_mtu")

Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Igor Russkikh 2017-09-25 10:48:47 +03:00 committed by David S. Miller
parent 62b982eeb4
commit d85fc17bee
2 changed files with 3 additions and 10 deletions
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11
drivers/net/ethernet/aquantia/atlantic/aq_nic.c
View File

@ -214,7 +214,6 @@ struct aq_nic_s *aq_nic_alloc_cold(const struct net_device_ops *ndev_ops,
SET_NETDEV_DEV(ndev, dev);
ndev->if_port = port;
ndev->min_mtu = ETH_MIN_MTU;
self->ndev = ndev;
self->aq_pci_func = aq_pci_func;
@ -283,6 +282,7 @@ int aq_nic_ndev_init(struct aq_nic_s *self)
self->ndev->features = aq_hw_caps->hw_features;
self->ndev->priv_flags = aq_hw_caps->hw_priv_flags;
self->ndev->mtu = aq_nic_cfg->mtu - ETH_HLEN;
self->ndev->max_mtu = self->aq_hw_caps.mtu - ETH_FCS_LEN - ETH_HLEN;
return 0;
}
@ -693,16 +693,9 @@ int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu)
{
int err = 0;
if (new_mtu > self->aq_hw_caps.mtu) {
err = -EINVAL;
goto err_exit;
}
self->aq_nic_cfg.mtu = new_mtu;
err_exit:
return err;
return 0;
}
int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev)

2
drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0_internal.h
View File

@ -16,7 +16,7 @@
#include "../aq_common.h"
#define HW_ATL_B0_MTU_JUMBO (16000U)
#define HW_ATL_B0_MTU_JUMBO 16352U
#define HW_ATL_B0_MTU 1514U
#define HW_ATL_B0_TX_RINGS 4U