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sfc: move yet more functions

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Functions are not related.

Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Maftei (amaftei)
2020-01-10 13:28:23 +00:00
committed by David S. Miller
parent 960f16275b
commit 314823108c
6 changed files with 66 additions and 64 deletions
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45
drivers/net/ethernet/sfc/efx_common.c
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@@ -197,6 +197,51 @@ void efx_link_status_changed(struct efx_nic *efx)
netif_info(efx, link, efx->net_dev, "link down\n");
}
unsigned int efx_xdp_max_mtu(struct efx_nic *efx)
{
/* The maximum MTU that we can fit in a single page, allowing for
* framing, overhead and XDP headroom.
*/
int overhead = EFX_MAX_FRAME_LEN(0) + sizeof(struct efx_rx_page_state) +
efx->rx_prefix_size + efx->type->rx_buffer_padding +
efx->rx_ip_align + XDP_PACKET_HEADROOM;
return PAGE_SIZE - overhead;
}
/* Context: process, rtnl_lock() held. */
int efx_change_mtu(struct net_device *net_dev, int new_mtu)
{
struct efx_nic *efx = netdev_priv(net_dev);
int rc;
rc = efx_check_disabled(efx);
if (rc)
return rc;
if (rtnl_dereference(efx->xdp_prog) &&
new_mtu > efx_xdp_max_mtu(efx)) {
netif_err(efx, drv, efx->net_dev,
"Requested MTU of %d too big for XDP (max: %d)\n",
new_mtu, efx_xdp_max_mtu(efx));
return -EINVAL;
}
netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu);
efx_device_detach_sync(efx);
efx_stop_all(efx);
mutex_lock(&efx->mac_lock);
net_dev->mtu = new_mtu;
efx_mac_reconfigure(efx);
mutex_unlock(&efx->mac_lock);
efx_start_all(efx);
efx_device_attach_if_not_resetting(efx);
return 0;
}
/**************************************************************************
*
* Hardware monitor