net: dwc-xlgmac: add the initial ethtool support

It is necessary to provide ethtool support for displaying and
modifying parameters of dwc-xlgmac.

Signed-off-by: Jie Deng <jiedeng@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 275 insertions, 0 deletions

diff --git a/drivers/net/ethernet/synopsys/dwc-xlgmac-ethtool.c b/drivers/net/ethernet/synopsys/dwc-xlgmac-ethtool.c
new file mode 100644
index 000000000000..fde722136869
--- /dev/null
+++ b/drivers/net/ethernet/synopsys/dwc-xlgmac-ethtool.c
@@ -0,0 +1,275 @@
+/* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
+ *
+ * Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is dual-licensed; you may select either version 2 of
+ * the GNU General Public License ("GPL") or BSD license ("BSD").
+ *
+ * This Synopsys DWC XLGMAC software driver and associated documentation
+ * (hereinafter the "Software") is an unsupported proprietary work of
+ * Synopsys, Inc. unless otherwise expressly agreed to in writing between
+ * Synopsys and you. The Software IS NOT an item of Licensed Software or a
+ * Licensed Product under any End User Software License Agreement or
+ * Agreement for Licensed Products with Synopsys or any supplement thereto.
+ * Synopsys is a registered trademark of Synopsys, Inc. Other names included
+ * in the SOFTWARE may be the trademarks of their respective owners.
+ */
+
+#include <linux/ethtool.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+
+#include "dwc-xlgmac.h"
+#include "dwc-xlgmac-reg.h"
+
+struct xlgmac_stats_desc {
+	char stat_string[ETH_GSTRING_LEN];
+	int stat_offset;
+};
+
+#define XLGMAC_STAT(str, var)					\
+	{							\
+		str,						\
+		offsetof(struct xlgmac_pdata, stats.var),	\
+	}
+
+static const struct xlgmac_stats_desc xlgmac_gstring_stats[] = {
+	/* MMC TX counters */
+	XLGMAC_STAT("tx_bytes", txoctetcount_gb),
+	XLGMAC_STAT("tx_bytes_good", txoctetcount_g),
+	XLGMAC_STAT("tx_packets", txframecount_gb),
+	XLGMAC_STAT("tx_packets_good", txframecount_g),
+	XLGMAC_STAT("tx_unicast_packets", txunicastframes_gb),
+	XLGMAC_STAT("tx_broadcast_packets", txbroadcastframes_gb),
+	XLGMAC_STAT("tx_broadcast_packets_good", txbroadcastframes_g),
+	XLGMAC_STAT("tx_multicast_packets", txmulticastframes_gb),
+	XLGMAC_STAT("tx_multicast_packets_good", txmulticastframes_g),
+	XLGMAC_STAT("tx_vlan_packets_good", txvlanframes_g),
+	XLGMAC_STAT("tx_64_byte_packets", tx64octets_gb),
+	XLGMAC_STAT("tx_65_to_127_byte_packets", tx65to127octets_gb),
+	XLGMAC_STAT("tx_128_to_255_byte_packets", tx128to255octets_gb),
+	XLGMAC_STAT("tx_256_to_511_byte_packets", tx256to511octets_gb),
+	XLGMAC_STAT("tx_512_to_1023_byte_packets", tx512to1023octets_gb),
+	XLGMAC_STAT("tx_1024_to_max_byte_packets", tx1024tomaxoctets_gb),
+	XLGMAC_STAT("tx_underflow_errors", txunderflowerror),
+	XLGMAC_STAT("tx_pause_frames", txpauseframes),
+
+	/* MMC RX counters */
+	XLGMAC_STAT("rx_bytes", rxoctetcount_gb),
+	XLGMAC_STAT("rx_bytes_good", rxoctetcount_g),
+	XLGMAC_STAT("rx_packets", rxframecount_gb),
+	XLGMAC_STAT("rx_unicast_packets_good", rxunicastframes_g),
+	XLGMAC_STAT("rx_broadcast_packets_good", rxbroadcastframes_g),
+	XLGMAC_STAT("rx_multicast_packets_good", rxmulticastframes_g),
+	XLGMAC_STAT("rx_vlan_packets", rxvlanframes_gb),
+	XLGMAC_STAT("rx_64_byte_packets", rx64octets_gb),
+	XLGMAC_STAT("rx_65_to_127_byte_packets", rx65to127octets_gb),
+	XLGMAC_STAT("rx_128_to_255_byte_packets", rx128to255octets_gb),
+	XLGMAC_STAT("rx_256_to_511_byte_packets", rx256to511octets_gb),
+	XLGMAC_STAT("rx_512_to_1023_byte_packets", rx512to1023octets_gb),
+	XLGMAC_STAT("rx_1024_to_max_byte_packets", rx1024tomaxoctets_gb),
+	XLGMAC_STAT("rx_undersize_packets_good", rxundersize_g),
+	XLGMAC_STAT("rx_oversize_packets_good", rxoversize_g),
+	XLGMAC_STAT("rx_crc_errors", rxcrcerror),
+	XLGMAC_STAT("rx_crc_errors_small_packets", rxrunterror),
+	XLGMAC_STAT("rx_crc_errors_giant_packets", rxjabbererror),
+	XLGMAC_STAT("rx_length_errors", rxlengtherror),
+	XLGMAC_STAT("rx_out_of_range_errors", rxoutofrangetype),
+	XLGMAC_STAT("rx_fifo_overflow_errors", rxfifooverflow),
+	XLGMAC_STAT("rx_watchdog_errors", rxwatchdogerror),
+	XLGMAC_STAT("rx_pause_frames", rxpauseframes),
+
+	/* Extra counters */
+	XLGMAC_STAT("tx_tso_packets", tx_tso_packets),
+	XLGMAC_STAT("rx_split_header_packets", rx_split_header_packets),
+	XLGMAC_STAT("tx_process_stopped", tx_process_stopped),
+	XLGMAC_STAT("rx_process_stopped", rx_process_stopped),
+	XLGMAC_STAT("tx_buffer_unavailable", tx_buffer_unavailable),
+	XLGMAC_STAT("rx_buffer_unavailable", rx_buffer_unavailable),
+	XLGMAC_STAT("fatal_bus_error", fatal_bus_error),
+	XLGMAC_STAT("tx_vlan_packets", tx_vlan_packets),
+	XLGMAC_STAT("rx_vlan_packets", rx_vlan_packets),
+	XLGMAC_STAT("napi_poll_isr", napi_poll_isr),
+	XLGMAC_STAT("napi_poll_txtimer", napi_poll_txtimer),
+};
+
+#define XLGMAC_STATS_COUNT	ARRAY_SIZE(xlgmac_gstring_stats)
+
+static void xlgmac_ethtool_get_drvinfo(struct net_device *netdev,
+				       struct ethtool_drvinfo *drvinfo)
+{
+	struct xlgmac_pdata *pdata = netdev_priv(netdev);
+	u32 ver = pdata->hw_feat.version;
+	u32 snpsver, devid, userver;
+
+	strlcpy(drvinfo->driver, pdata->drv_name, sizeof(drvinfo->driver));
+	strlcpy(drvinfo->version, pdata->drv_ver, sizeof(drvinfo->version));
+	strlcpy(drvinfo->bus_info, dev_name(pdata->dev),
+		sizeof(drvinfo->bus_info));
+	/* S|SNPSVER: Synopsys-defined Version
+	 * D|DEVID: Indicates the Device family
+	 * U|USERVER: User-defined Version
+	 */
+	snpsver = XLGMAC_GET_REG_BITS(ver, MAC_VR_SNPSVER_POS,
+				      MAC_VR_SNPSVER_LEN);
+	devid = XLGMAC_GET_REG_BITS(ver, MAC_VR_DEVID_POS,
+				    MAC_VR_DEVID_LEN);
+	userver = XLGMAC_GET_REG_BITS(ver, MAC_VR_USERVER_POS,
+				      MAC_VR_USERVER_LEN);
+	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
+		 "S.D.U: %x.%x.%x", snpsver, devid, userver);
+}
+
+static u32 xlgmac_ethtool_get_msglevel(struct net_device *netdev)
+{
+	struct xlgmac_pdata *pdata = netdev_priv(netdev);
+
+	return pdata->msg_enable;
+}
+
+static void xlgmac_ethtool_set_msglevel(struct net_device *netdev,
+					u32 msglevel)
+{
+	struct xlgmac_pdata *pdata = netdev_priv(netdev);
+
+	pdata->msg_enable = msglevel;
+}
+
+static void xlgmac_ethtool_get_channels(struct net_device *netdev,
+					struct ethtool_channels *channel)
+{
+	struct xlgmac_pdata *pdata = netdev_priv(netdev);
+
+	channel->max_rx = XLGMAC_MAX_DMA_CHANNELS;
+	channel->max_tx = XLGMAC_MAX_DMA_CHANNELS;
+	channel->rx_count = pdata->rx_q_count;
+	channel->tx_count = pdata->tx_q_count;
+}
+
+static int xlgmac_ethtool_get_coalesce(struct net_device *netdev,
+				       struct ethtool_coalesce *ec)
+{
+	struct xlgmac_pdata *pdata = netdev_priv(netdev);
+
+	memset(ec, 0, sizeof(struct ethtool_coalesce));
+	ec->rx_coalesce_usecs = pdata->rx_usecs;
+	ec->rx_max_coalesced_frames = pdata->rx_frames;
+	ec->tx_max_coalesced_frames = pdata->tx_frames;
+
+	return 0;
+}
+
+static int xlgmac_ethtool_set_coalesce(struct net_device *netdev,
+				       struct ethtool_coalesce *ec)
+{
+	struct xlgmac_pdata *pdata = netdev_priv(netdev);
+	struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
+	unsigned int rx_frames, rx_riwt, rx_usecs;
+	unsigned int tx_frames;
+
+	/* Check for not supported parameters */
+	if ((ec->rx_coalesce_usecs_irq) || (ec->rx_max_coalesced_frames_irq) ||
+	    (ec->tx_coalesce_usecs) || (ec->tx_coalesce_usecs_high) ||
+	    (ec->tx_max_coalesced_frames_irq) || (ec->tx_coalesce_usecs_irq) ||
+	    (ec->stats_block_coalesce_usecs) ||  (ec->pkt_rate_low) ||
+	    (ec->use_adaptive_rx_coalesce) || (ec->use_adaptive_tx_coalesce) ||
+	    (ec->rx_max_coalesced_frames_low) || (ec->rx_coalesce_usecs_low) ||
+	    (ec->tx_coalesce_usecs_low) || (ec->tx_max_coalesced_frames_low) ||
+	    (ec->pkt_rate_high) || (ec->rx_coalesce_usecs_high) ||
+	    (ec->rx_max_coalesced_frames_high) ||
+	    (ec->tx_max_coalesced_frames_high) ||
+	    (ec->rate_sample_interval))
+		return -EOPNOTSUPP;
+
+	rx_usecs = ec->rx_coalesce_usecs;
+	rx_riwt = hw_ops->usec_to_riwt(pdata, rx_usecs);
+	rx_frames = ec->rx_max_coalesced_frames;
+	tx_frames = ec->tx_max_coalesced_frames;
+
+	if ((rx_riwt > XLGMAC_MAX_DMA_RIWT) ||
+	    (rx_riwt < XLGMAC_MIN_DMA_RIWT) ||
+	    (rx_frames > pdata->rx_desc_count))
+		return -EINVAL;
+
+	if (tx_frames > pdata->tx_desc_count)
+		return -EINVAL;
+
+	pdata->rx_riwt = rx_riwt;
+	pdata->rx_usecs = rx_usecs;
+	pdata->rx_frames = rx_frames;
+	hw_ops->config_rx_coalesce(pdata);
+
+	pdata->tx_frames = tx_frames;
+	hw_ops->config_tx_coalesce(pdata);
+
+	return 0;
+}
+
+static void xlgmac_ethtool_get_strings(struct net_device *netdev,
+				       u32 stringset, u8 *data)
+{
+	int i;
+
+	switch (stringset) {
+	case ETH_SS_STATS:
+		for (i = 0; i < XLGMAC_STATS_COUNT; i++) {
+			memcpy(data, xlgmac_gstring_stats[i].stat_string,
+			       ETH_GSTRING_LEN);
+			data += ETH_GSTRING_LEN;
+		}
+		break;
+	default:
+		WARN_ON(1);
+		break;
+	}
+}
+
+static int xlgmac_ethtool_get_sset_count(struct net_device *netdev,
+					 int stringset)
+{
+	int ret;
+
+	switch (stringset) {
+	case ETH_SS_STATS:
+		ret = XLGMAC_STATS_COUNT;
+		break;
+
+	default:
+		ret = -EOPNOTSUPP;
+	}
+
+	return ret;
+}
+
+static void xlgmac_ethtool_get_ethtool_stats(struct net_device *netdev,
+					     struct ethtool_stats *stats,
+					     u64 *data)
+{
+	struct xlgmac_pdata *pdata = netdev_priv(netdev);
+	u8 *stat;
+	int i;
+
+	pdata->hw_ops.read_mmc_stats(pdata);
+	for (i = 0; i < XLGMAC_STATS_COUNT; i++) {
+		stat = (u8 *)pdata + xlgmac_gstring_stats[i].stat_offset;
+		*data++ = *(u64 *)stat;
+	}
+}
+
+static const struct ethtool_ops xlgmac_ethtool_ops = {
+	.get_drvinfo = xlgmac_ethtool_get_drvinfo,
+	.get_link = ethtool_op_get_link,
+	.get_msglevel = xlgmac_ethtool_get_msglevel,
+	.set_msglevel = xlgmac_ethtool_set_msglevel,
+	.get_channels = xlgmac_ethtool_get_channels,
+	.get_coalesce = xlgmac_ethtool_get_coalesce,
+	.set_coalesce = xlgmac_ethtool_set_coalesce,
+	.get_strings = xlgmac_ethtool_get_strings,
+	.get_sset_count = xlgmac_ethtool_get_sset_count,
+	.get_ethtool_stats = xlgmac_ethtool_get_ethtool_stats,
+};
+
+const struct ethtool_ops *xlgmac_get_ethtool_ops(void)
+{
+	return &xlgmac_ethtool_ops;
+}