504 lines
12 KiB
C
504 lines
12 KiB
C
/* 10G controller driver for Samsung SoCs
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*
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* Copyright (C) 2013 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Author: Siva Reddy Kallam <siva.kallam@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/clk.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/net_tstamp.h>
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#include <linux/phy.h>
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#include <linux/ptp_clock_kernel.h>
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#include "sxgbe_common.h"
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#include "sxgbe_reg.h"
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#include "sxgbe_dma.h"
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struct sxgbe_stats {
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char stat_string[ETH_GSTRING_LEN];
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int sizeof_stat;
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int stat_offset;
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};
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#define SXGBE_STAT(m) \
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{ \
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#m, \
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FIELD_SIZEOF(struct sxgbe_extra_stats, m), \
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offsetof(struct sxgbe_priv_data, xstats.m) \
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}
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static const struct sxgbe_stats sxgbe_gstrings_stats[] = {
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/* TX/RX IRQ events */
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SXGBE_STAT(tx_process_stopped_irq),
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SXGBE_STAT(tx_ctxt_desc_err),
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SXGBE_STAT(tx_threshold),
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SXGBE_STAT(rx_threshold),
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SXGBE_STAT(tx_pkt_n),
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SXGBE_STAT(rx_pkt_n),
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SXGBE_STAT(normal_irq_n),
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SXGBE_STAT(tx_normal_irq_n),
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SXGBE_STAT(rx_normal_irq_n),
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SXGBE_STAT(napi_poll),
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SXGBE_STAT(tx_clean),
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SXGBE_STAT(tx_reset_ic_bit),
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SXGBE_STAT(rx_process_stopped_irq),
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SXGBE_STAT(rx_underflow_irq),
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/* Bus access errors */
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SXGBE_STAT(fatal_bus_error_irq),
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SXGBE_STAT(tx_read_transfer_err),
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SXGBE_STAT(tx_write_transfer_err),
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SXGBE_STAT(tx_desc_access_err),
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SXGBE_STAT(tx_buffer_access_err),
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SXGBE_STAT(tx_data_transfer_err),
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SXGBE_STAT(rx_read_transfer_err),
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SXGBE_STAT(rx_write_transfer_err),
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SXGBE_STAT(rx_desc_access_err),
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SXGBE_STAT(rx_buffer_access_err),
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SXGBE_STAT(rx_data_transfer_err),
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/* EEE-LPI stats */
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SXGBE_STAT(tx_lpi_entry_n),
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SXGBE_STAT(tx_lpi_exit_n),
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SXGBE_STAT(rx_lpi_entry_n),
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SXGBE_STAT(rx_lpi_exit_n),
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SXGBE_STAT(eee_wakeup_error_n),
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/* RX specific */
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/* L2 error */
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SXGBE_STAT(rx_code_gmii_err),
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SXGBE_STAT(rx_watchdog_err),
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SXGBE_STAT(rx_crc_err),
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SXGBE_STAT(rx_gaint_pkt_err),
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SXGBE_STAT(ip_hdr_err),
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SXGBE_STAT(ip_payload_err),
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SXGBE_STAT(overflow_error),
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/* L2 Pkt type */
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SXGBE_STAT(len_pkt),
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SXGBE_STAT(mac_ctl_pkt),
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SXGBE_STAT(dcb_ctl_pkt),
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SXGBE_STAT(arp_pkt),
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SXGBE_STAT(oam_pkt),
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SXGBE_STAT(untag_okt),
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SXGBE_STAT(other_pkt),
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SXGBE_STAT(svlan_tag_pkt),
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SXGBE_STAT(cvlan_tag_pkt),
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SXGBE_STAT(dvlan_ocvlan_icvlan_pkt),
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SXGBE_STAT(dvlan_osvlan_isvlan_pkt),
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SXGBE_STAT(dvlan_osvlan_icvlan_pkt),
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SXGBE_STAT(dvan_ocvlan_icvlan_pkt),
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/* L3/L4 Pkt type */
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SXGBE_STAT(not_ip_pkt),
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SXGBE_STAT(ip4_tcp_pkt),
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SXGBE_STAT(ip4_udp_pkt),
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SXGBE_STAT(ip4_icmp_pkt),
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SXGBE_STAT(ip4_unknown_pkt),
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SXGBE_STAT(ip6_tcp_pkt),
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SXGBE_STAT(ip6_udp_pkt),
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SXGBE_STAT(ip6_icmp_pkt),
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SXGBE_STAT(ip6_unknown_pkt),
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/* Filter specific */
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SXGBE_STAT(vlan_filter_match),
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SXGBE_STAT(sa_filter_fail),
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SXGBE_STAT(da_filter_fail),
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SXGBE_STAT(hash_filter_pass),
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SXGBE_STAT(l3_filter_match),
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SXGBE_STAT(l4_filter_match),
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/* RX context specific */
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SXGBE_STAT(timestamp_dropped),
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SXGBE_STAT(rx_msg_type_no_ptp),
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SXGBE_STAT(rx_ptp_type_sync),
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SXGBE_STAT(rx_ptp_type_follow_up),
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SXGBE_STAT(rx_ptp_type_delay_req),
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SXGBE_STAT(rx_ptp_type_delay_resp),
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SXGBE_STAT(rx_ptp_type_pdelay_req),
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SXGBE_STAT(rx_ptp_type_pdelay_resp),
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SXGBE_STAT(rx_ptp_type_pdelay_follow_up),
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SXGBE_STAT(rx_ptp_announce),
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SXGBE_STAT(rx_ptp_mgmt),
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SXGBE_STAT(rx_ptp_signal),
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SXGBE_STAT(rx_ptp_resv_msg_type),
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};
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#define SXGBE_STATS_LEN ARRAY_SIZE(sxgbe_gstrings_stats)
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static int sxgbe_get_eee(struct net_device *dev,
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struct ethtool_eee *edata)
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{
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struct sxgbe_priv_data *priv = netdev_priv(dev);
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if (!priv->hw_cap.eee)
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return -EOPNOTSUPP;
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edata->eee_enabled = priv->eee_enabled;
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edata->eee_active = priv->eee_active;
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edata->tx_lpi_timer = priv->tx_lpi_timer;
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return phy_ethtool_get_eee(dev->phydev, edata);
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}
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static int sxgbe_set_eee(struct net_device *dev,
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struct ethtool_eee *edata)
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{
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struct sxgbe_priv_data *priv = netdev_priv(dev);
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priv->eee_enabled = edata->eee_enabled;
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if (!priv->eee_enabled) {
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sxgbe_disable_eee_mode(priv);
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} else {
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/* We are asking for enabling the EEE but it is safe
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* to verify all by invoking the eee_init function.
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* In case of failure it will return an error.
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*/
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priv->eee_enabled = sxgbe_eee_init(priv);
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if (!priv->eee_enabled)
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return -EOPNOTSUPP;
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/* Do not change tx_lpi_timer in case of failure */
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priv->tx_lpi_timer = edata->tx_lpi_timer;
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}
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return phy_ethtool_set_eee(dev->phydev, edata);
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}
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static void sxgbe_getdrvinfo(struct net_device *dev,
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struct ethtool_drvinfo *info)
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{
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strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
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strlcpy(info->version, DRV_VERSION, sizeof(info->version));
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}
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static u32 sxgbe_getmsglevel(struct net_device *dev)
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{
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struct sxgbe_priv_data *priv = netdev_priv(dev);
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return priv->msg_enable;
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}
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static void sxgbe_setmsglevel(struct net_device *dev, u32 level)
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{
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struct sxgbe_priv_data *priv = netdev_priv(dev);
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priv->msg_enable = level;
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}
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static void sxgbe_get_strings(struct net_device *dev, u32 stringset, u8 *data)
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{
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int i;
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u8 *p = data;
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switch (stringset) {
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case ETH_SS_STATS:
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for (i = 0; i < SXGBE_STATS_LEN; i++) {
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memcpy(p, sxgbe_gstrings_stats[i].stat_string,
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ETH_GSTRING_LEN);
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p += ETH_GSTRING_LEN;
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}
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break;
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default:
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WARN_ON(1);
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break;
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}
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}
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static int sxgbe_get_sset_count(struct net_device *netdev, int sset)
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{
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int len;
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switch (sset) {
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case ETH_SS_STATS:
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len = SXGBE_STATS_LEN;
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return len;
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default:
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return -EINVAL;
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}
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}
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static void sxgbe_get_ethtool_stats(struct net_device *dev,
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struct ethtool_stats *dummy, u64 *data)
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{
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struct sxgbe_priv_data *priv = netdev_priv(dev);
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int i;
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char *p;
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if (priv->eee_enabled) {
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int val = phy_get_eee_err(dev->phydev);
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if (val)
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priv->xstats.eee_wakeup_error_n = val;
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}
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for (i = 0; i < SXGBE_STATS_LEN; i++) {
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p = (char *)priv + sxgbe_gstrings_stats[i].stat_offset;
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data[i] = (sxgbe_gstrings_stats[i].sizeof_stat == sizeof(u64))
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? (*(u64 *)p) : (*(u32 *)p);
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}
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}
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static void sxgbe_get_channels(struct net_device *dev,
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struct ethtool_channels *channel)
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{
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channel->max_rx = SXGBE_MAX_RX_CHANNELS;
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channel->max_tx = SXGBE_MAX_TX_CHANNELS;
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channel->rx_count = SXGBE_RX_QUEUES;
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channel->tx_count = SXGBE_TX_QUEUES;
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}
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static u32 sxgbe_riwt2usec(u32 riwt, struct sxgbe_priv_data *priv)
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{
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unsigned long clk = clk_get_rate(priv->sxgbe_clk);
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if (!clk)
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return 0;
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return (riwt * 256) / (clk / 1000000);
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}
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static u32 sxgbe_usec2riwt(u32 usec, struct sxgbe_priv_data *priv)
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{
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unsigned long clk = clk_get_rate(priv->sxgbe_clk);
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if (!clk)
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return 0;
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return (usec * (clk / 1000000)) / 256;
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}
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static int sxgbe_get_coalesce(struct net_device *dev,
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struct ethtool_coalesce *ec)
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{
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struct sxgbe_priv_data *priv = netdev_priv(dev);
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if (priv->use_riwt)
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ec->rx_coalesce_usecs = sxgbe_riwt2usec(priv->rx_riwt, priv);
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return 0;
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}
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static int sxgbe_set_coalesce(struct net_device *dev,
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struct ethtool_coalesce *ec)
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{
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struct sxgbe_priv_data *priv = netdev_priv(dev);
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unsigned int rx_riwt;
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if (!ec->rx_coalesce_usecs)
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return -EINVAL;
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rx_riwt = sxgbe_usec2riwt(ec->rx_coalesce_usecs, priv);
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if ((rx_riwt > SXGBE_MAX_DMA_RIWT) || (rx_riwt < SXGBE_MIN_DMA_RIWT))
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return -EINVAL;
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else if (!priv->use_riwt)
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return -EOPNOTSUPP;
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priv->rx_riwt = rx_riwt;
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priv->hw->dma->rx_watchdog(priv->ioaddr, priv->rx_riwt);
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return 0;
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}
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static int sxgbe_get_rss_hash_opts(struct sxgbe_priv_data *priv,
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struct ethtool_rxnfc *cmd)
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{
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cmd->data = 0;
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/* Report default options for RSS on sxgbe */
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switch (cmd->flow_type) {
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case TCP_V4_FLOW:
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case UDP_V4_FLOW:
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cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
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case SCTP_V4_FLOW:
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case AH_ESP_V4_FLOW:
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case AH_V4_FLOW:
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case ESP_V4_FLOW:
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case IPV4_FLOW:
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cmd->data |= RXH_IP_SRC | RXH_IP_DST;
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break;
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case TCP_V6_FLOW:
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case UDP_V6_FLOW:
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cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
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case SCTP_V6_FLOW:
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case AH_ESP_V6_FLOW:
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case AH_V6_FLOW:
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case ESP_V6_FLOW:
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case IPV6_FLOW:
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cmd->data |= RXH_IP_SRC | RXH_IP_DST;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int sxgbe_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
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u32 *rule_locs)
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{
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struct sxgbe_priv_data *priv = netdev_priv(dev);
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int ret = -EOPNOTSUPP;
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switch (cmd->cmd) {
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case ETHTOOL_GRXFH:
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ret = sxgbe_get_rss_hash_opts(priv, cmd);
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break;
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default:
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break;
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}
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return ret;
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}
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static int sxgbe_set_rss_hash_opt(struct sxgbe_priv_data *priv,
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struct ethtool_rxnfc *cmd)
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{
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u32 reg_val = 0;
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/* RSS does not support anything other than hashing
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* to queues on src and dst IPs and ports
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*/
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if (cmd->data & ~(RXH_IP_SRC | RXH_IP_DST |
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RXH_L4_B_0_1 | RXH_L4_B_2_3))
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return -EINVAL;
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switch (cmd->flow_type) {
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case TCP_V4_FLOW:
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case TCP_V6_FLOW:
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if (!(cmd->data & RXH_IP_SRC) ||
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!(cmd->data & RXH_IP_DST) ||
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!(cmd->data & RXH_L4_B_0_1) ||
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!(cmd->data & RXH_L4_B_2_3))
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return -EINVAL;
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reg_val = SXGBE_CORE_RSS_CTL_TCP4TE;
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break;
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case UDP_V4_FLOW:
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case UDP_V6_FLOW:
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if (!(cmd->data & RXH_IP_SRC) ||
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!(cmd->data & RXH_IP_DST) ||
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!(cmd->data & RXH_L4_B_0_1) ||
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!(cmd->data & RXH_L4_B_2_3))
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return -EINVAL;
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reg_val = SXGBE_CORE_RSS_CTL_UDP4TE;
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break;
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case SCTP_V4_FLOW:
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case AH_ESP_V4_FLOW:
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case AH_V4_FLOW:
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case ESP_V4_FLOW:
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case AH_ESP_V6_FLOW:
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case AH_V6_FLOW:
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case ESP_V6_FLOW:
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case SCTP_V6_FLOW:
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case IPV4_FLOW:
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case IPV6_FLOW:
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if (!(cmd->data & RXH_IP_SRC) ||
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!(cmd->data & RXH_IP_DST) ||
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(cmd->data & RXH_L4_B_0_1) ||
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(cmd->data & RXH_L4_B_2_3))
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return -EINVAL;
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reg_val = SXGBE_CORE_RSS_CTL_IP2TE;
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break;
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default:
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return -EINVAL;
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}
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/* Read SXGBE RSS control register and update */
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reg_val |= readl(priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
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writel(reg_val, priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
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readl(priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
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return 0;
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}
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static int sxgbe_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
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{
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struct sxgbe_priv_data *priv = netdev_priv(dev);
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int ret = -EOPNOTSUPP;
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switch (cmd->cmd) {
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case ETHTOOL_SRXFH:
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ret = sxgbe_set_rss_hash_opt(priv, cmd);
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break;
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default:
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break;
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}
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return ret;
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}
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static void sxgbe_get_regs(struct net_device *dev,
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struct ethtool_regs *regs, void *space)
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{
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struct sxgbe_priv_data *priv = netdev_priv(dev);
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u32 *reg_space = (u32 *)space;
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int reg_offset;
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int reg_ix = 0;
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void __iomem *ioaddr = priv->ioaddr;
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memset(reg_space, 0x0, REG_SPACE_SIZE);
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/* MAC registers */
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for (reg_offset = START_MAC_REG_OFFSET;
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reg_offset <= MAX_MAC_REG_OFFSET; reg_offset += 4) {
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reg_space[reg_ix] = readl(ioaddr + reg_offset);
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reg_ix++;
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}
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/* MTL registers */
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for (reg_offset = START_MTL_REG_OFFSET;
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reg_offset <= MAX_MTL_REG_OFFSET; reg_offset += 4) {
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reg_space[reg_ix] = readl(ioaddr + reg_offset);
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reg_ix++;
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}
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/* DMA registers */
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for (reg_offset = START_DMA_REG_OFFSET;
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reg_offset <= MAX_DMA_REG_OFFSET; reg_offset += 4) {
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reg_space[reg_ix] = readl(ioaddr + reg_offset);
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reg_ix++;
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}
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BUG_ON(reg_ix * 4 > REG_SPACE_SIZE);
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}
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static int sxgbe_get_regs_len(struct net_device *dev)
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{
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return REG_SPACE_SIZE;
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}
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static const struct ethtool_ops sxgbe_ethtool_ops = {
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.get_drvinfo = sxgbe_getdrvinfo,
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.get_msglevel = sxgbe_getmsglevel,
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.set_msglevel = sxgbe_setmsglevel,
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.get_link = ethtool_op_get_link,
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.get_strings = sxgbe_get_strings,
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.get_ethtool_stats = sxgbe_get_ethtool_stats,
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.get_sset_count = sxgbe_get_sset_count,
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.get_channels = sxgbe_get_channels,
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.get_coalesce = sxgbe_get_coalesce,
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.set_coalesce = sxgbe_set_coalesce,
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.get_rxnfc = sxgbe_get_rxnfc,
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.set_rxnfc = sxgbe_set_rxnfc,
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.get_regs = sxgbe_get_regs,
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.get_regs_len = sxgbe_get_regs_len,
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.get_eee = sxgbe_get_eee,
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.set_eee = sxgbe_set_eee,
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.get_link_ksettings = phy_ethtool_get_link_ksettings,
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.set_link_ksettings = phy_ethtool_set_link_ksettings,
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};
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void sxgbe_set_ethtool_ops(struct net_device *netdev)
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{
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netdev->ethtool_ops = &sxgbe_ethtool_ops;
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}
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