/*
* Copyright (c) 2015-2016, Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/tcp.h>
#include <linux/if_vlan.h>
#include <linux/ptp_classify.h>
#include <net/geneve.h>
#include <net/dsfield.h>
#include "en.h"
#include "en/txrx.h"
#include "ipoib/ipoib.h"
#include "en_accel/en_accel.h"
#include "lib/clock.h"
#include "en/ptp.h"
static void mlx5e_dma_unmap_wqe_err(struct mlx5e_txqsq *sq, u8 num_dma)
{
int i;
for (i = 0; i < num_dma; i++) {
struct mlx5e_sq_dma *last_pushed_dma =
mlx5e_dma_get(sq, --sq->dma_fifo_pc);
mlx5e_tx_dma_unmap(sq->pdev, last_pushed_dma);
}
}
#ifdef CONFIG_MLX5_CORE_EN_DCB
static inline int mlx5e_get_dscp_up(struct mlx5e_priv *priv, struct sk_buff *skb)
{
int dscp_cp = 0;
if (skb->protocol == htons(ETH_P_IP))
dscp_cp = ipv4_get_dsfield(ip_hdr(skb)) >> 2;
else if (skb->protocol == htons(ETH_P_IPV6))
dscp_cp = ipv6_get_dsfield(ipv6_hdr(skb)) >> 2;
return priv->dcbx_dp.dscp2prio[dscp_cp];
}
#endif
static bool mlx5e_use_ptpsq(struct sk_buff *skb)
{
struct flow_keys fk;
if (!skb_flow_dissect_flow_keys(skb, &fk, 0))
return false;
if (fk.basic.n_proto == htons(ETH_P_1588))
return true;
if (fk.basic.n_proto != htons(ETH_P_IP) &&
fk.basic.n_proto != htons(ETH_P_IPV6))
return false;
return (fk.basic.ip_proto == IPPROTO_UDP &&
fk.ports.dst == htons(PTP_EV_PORT));
}
static u16 mlx5e_select_ptpsq(struct net_device *dev, struct sk_buff *skb)
{
struct mlx5e_priv *priv = netdev_priv(dev);
int up = 0;
if (!netdev_get_num_tc(dev))
goto return_txq;
#ifdef CONFIG_MLX5_CORE_EN_DCB
if (priv->dcbx_dp.trust_state == MLX5_QPTS_TRUST_DSCP)
up = mlx5e_get_dscp_up(priv, skb);
else
#endif
if (skb_vlan_tag_present(skb))
up = skb_vlan_tag_get_prio(skb);
return_txq:
return priv->port_ptp_tc2realtxq[up];
}
u16 mlx5e_select_queue(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev)
{
struct mlx5e_priv *priv = netdev_priv(dev);
int txq_ix;
int up = 0;
int ch_ix;
if (unlikely(priv->channels.port_ptp)) {
int num_tc_x_num_ch;
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
mlx5e_use_ptpsq(skb))
return mlx5e_select_ptpsq(dev, skb);
/* Sync with mlx5e_update_num_tc_x_num_ch - avoid refetching. */
num_tc_x_num_ch = READ_ONCE(priv->num_tc_x_num_ch);
txq_ix = netdev_pick_tx(dev, skb, NULL);
/* Fix netdev_pick_tx() not to choose ptp_channel txqs.
* If they are selected, switch to regular queues.
* Driver to select these queues only at mlx5e_select_ptpsq().
*/
if (unlikely(txq_ix >= num_tc_x_num_ch))
txq_ix %= num_tc_x_num_ch;
} else {
txq_ix = netdev_pick_tx(dev, skb, NULL);
}
if (!netdev_get_num_tc(dev))
return txq_ix;
#ifdef CONFIG_MLX5_CORE_EN_DCB
if (priv->dcbx_dp.trust_state == MLX5_QPTS_TRUST_DSCP)