From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755420AbdGWRFH (ORCPT ); Sun, 23 Jul 2017 13:05:07 -0400 Received: from mail-oi0-f65.google.com ([209.85.218.65]:36900 "EHLO mail-oi0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751410AbdGWRFF (ORCPT ); Sun, 23 Jul 2017 13:05:05 -0400 Subject: Re: [PATCH V4 net-next 7/8] net: hns3: Add Ethtool support to HNS3 driver To: Salil Mehta , davem@davemloft.net Cc: yisen.zhuang@huawei.com, huangdaode@hisilicon.com, lipeng321@huawei.com, mehta.salil.lnk@gmail.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, linuxarm@huawei.com References: <20170722220942.78852-1-salil.mehta@huawei.com> <20170722220942.78852-8-salil.mehta@huawei.com> From: Florian Fainelli Message-ID: <23ddbe00-8bef-a09b-5783-3a5438086bd6@gmail.com> Date: Sun, 23 Jul 2017 10:05:02 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <20170722220942.78852-8-salil.mehta@huawei.com> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/22/2017 03:09 PM, Salil Mehta wrote: > This patch adds the support of the Ethtool interface to > the HNS3 Ethernet driver. Various commands to read the > statistics, configure the offloading, loopback selftest etc. > are supported. > > Signed-off-by: Daode Huang > Signed-off-by: lipeng > Signed-off-by: Salil Mehta > Signed-off-by: Yisen Zhuang > --- > Patch V4: addressed below comments > 1. Andrew Lunn > Removed the support of loop PHY back for now > Patch V3: Address below comments > 1. Stephen Hemminger > https://lkml.org/lkml/2017/6/13/974 > 2. Andrew Lunn > https://lkml.org/lkml/2017/6/13/1037 > Patch V2: No change > Patch V1: Initial Submit > --- > .../ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c | 543 +++++++++++++++++++++ > 1 file changed, 543 insertions(+) > create mode 100644 drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c > > diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c > new file mode 100644 > index 000000000000..82b0d4d829f8 > --- /dev/null > +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c > @@ -0,0 +1,543 @@ > +/* > + * Copyright (c) 2016~2017 Hisilicon Limited. > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + */ > + > +#include > +#include "hns3_enet.h" > + > +struct hns3_stats { > + char stats_string[ETH_GSTRING_LEN]; > + int stats_size; > + int stats_offset; > +}; > + > +/* netdev related stats */ > +#define HNS3_NETDEV_STAT(_string, _member) \ > + { _string, \ > + FIELD_SIZEOF(struct rtnl_link_stats64, _member), \ > + offsetof(struct rtnl_link_stats64, _member), \ > + } Can you make this macro use named initializers? > + > +static const struct hns3_stats hns3_netdev_stats[] = { > + /* misc. Rx/Tx statistics */ > + HNS3_NETDEV_STAT("rx_packets", rx_packets), > + HNS3_NETDEV_STAT("tx_packets", tx_packets), > + HNS3_NETDEV_STAT("rx_bytes", rx_bytes), > + HNS3_NETDEV_STAT("tx_bytes", tx_bytes), > + HNS3_NETDEV_STAT("rx_errors", rx_errors), > + HNS3_NETDEV_STAT("tx_errors", tx_errors), > + HNS3_NETDEV_STAT("rx_dropped", rx_dropped), > + HNS3_NETDEV_STAT("tx_dropped", tx_dropped), > + HNS3_NETDEV_STAT("multicast", multicast), > + HNS3_NETDEV_STAT("collisions", collisions), > + > + /* detailed Rx errors */ > + HNS3_NETDEV_STAT("rx_length_errors", rx_length_errors), > + HNS3_NETDEV_STAT("rx_over_errors", rx_over_errors), > + HNS3_NETDEV_STAT("rx_crc_errors", rx_crc_errors), > + HNS3_NETDEV_STAT("rx_frame_errors", rx_frame_errors), > + HNS3_NETDEV_STAT("rx_fifo_errors", rx_fifo_errors), > + HNS3_NETDEV_STAT("rx_missed_errors", rx_missed_errors), > + > + /* detailed Tx errors */ > + HNS3_NETDEV_STAT("tx_aborted_errors", tx_aborted_errors), > + HNS3_NETDEV_STAT("tx_carrier_errors", tx_carrier_errors), > + HNS3_NETDEV_STAT("tx_fifo_errors", tx_fifo_errors), > + HNS3_NETDEV_STAT("tx_heartbeat_errors", tx_heartbeat_errors), > + HNS3_NETDEV_STAT("tx_window_errors", tx_window_errors), > + > + /* for cslip etc */ > + HNS3_NETDEV_STAT("rx_compressed", rx_compressed), > + HNS3_NETDEV_STAT("tx_compressed", tx_compressed), > +}; > + > +#define HNS3_NETDEV_STATS_COUNT ARRAY_SIZE(hns3_netdev_stats) > + > +/* tqp related stats */ > +#define HNS3_TQP_STAT(_string, _member) \ > + { _string, \ > + FIELD_SIZEOF(struct ring_stats, _member), \ > + offsetof(struct hns3_enet_ring, stats), \ > + } > + Same here. > +static const struct hns3_stats hns3_txq_stats[] = { > + /* Tx per-queue statistics */ > + HNS3_TQP_STAT("tx_io_err_cnt", io_err_cnt), > + HNS3_TQP_STAT("tx_sw_err_cnt", sw_err_cnt), > + HNS3_TQP_STAT("tx_seg_pkt_cnt", seg_pkt_cnt), > + HNS3_TQP_STAT("tx_pkts", tx_pkts), > + HNS3_TQP_STAT("tx_bytes", tx_bytes), > + HNS3_TQP_STAT("tx_err_cnt", tx_err_cnt), > + HNS3_TQP_STAT("tx_restart_queue", restart_queue), > + HNS3_TQP_STAT("tx_busy", tx_busy), > +}; > + > +#define HNS3_TXQ_STATS_COUNT ARRAY_SIZE(hns3_txq_stats) > + > +static const struct hns3_stats hns3_rxq_stats[] = { > + /* Rx per-queue statistics */ > + HNS3_TQP_STAT("rx_io_err_cnt", io_err_cnt), > + HNS3_TQP_STAT("rx_sw_err_cnt", sw_err_cnt), > + HNS3_TQP_STAT("rx_seg_pkt_cnt", seg_pkt_cnt), > + HNS3_TQP_STAT("rx_pkts", rx_pkts), > + HNS3_TQP_STAT("rx_bytes", rx_bytes), > + HNS3_TQP_STAT("rx_err_cnt", rx_err_cnt), > + HNS3_TQP_STAT("rx_reuse_pg_cnt", reuse_pg_cnt), > + HNS3_TQP_STAT("rx_err_pkt_len", err_pkt_len), > + HNS3_TQP_STAT("rx_non_vld_descs", non_vld_descs), > + HNS3_TQP_STAT("rx_err_bd_num", err_bd_num), > + HNS3_TQP_STAT("rx_l2_err", l2_err), > + HNS3_TQP_STAT("rx_l3l4_csum_err", l3l4_csum_err), > +}; > + > +#define HNS3_RXQ_STATS_COUNT ARRAY_SIZE(hns3_rxq_stats) > + > +#define HNS3_TQP_STATS_COUNT (HNS3_TXQ_STATS_COUNT + HNS3_RXQ_STATS_COUNT) > + > +struct hns3_link_mode_mapping { > + u32 hns3_link_mode; > + u32 ethtool_link_mode; > +}; > + > +static const struct hns3_link_mode_mapping hns3_lm_map[] = { > + {HNS3_LM_FIBRE_BIT, ETHTOOL_LINK_MODE_FIBRE_BIT}, > + {HNS3_LM_AUTONEG_BIT, ETHTOOL_LINK_MODE_Autoneg_BIT}, > + {HNS3_LM_TP_BIT, ETHTOOL_LINK_MODE_TP_BIT}, > + {HNS3_LM_PAUSE_BIT, ETHTOOL_LINK_MODE_Pause_BIT}, > + {HNS3_LM_BACKPLANE_BIT, ETHTOOL_LINK_MODE_Backplane_BIT}, > + {HNS3_LM_10BASET_HALF_BIT, ETHTOOL_LINK_MODE_10baseT_Half_BIT}, > + {HNS3_LM_10BASET_FULL_BIT, ETHTOOL_LINK_MODE_10baseT_Full_BIT}, > + {HNS3_LM_100BASET_HALF_BIT, ETHTOOL_LINK_MODE_100baseT_Half_BIT}, > + {HNS3_LM_100BASET_FULL_BIT, ETHTOOL_LINK_MODE_100baseT_Full_BIT}, > + {HNS3_LM_1000BASET_FULL_BIT, ETHTOOL_LINK_MODE_1000baseT_Full_BIT}, > +}; > + > +#define HNS3_DRV_TO_ETHTOOL_CAPS(caps, lk_ksettings, name) \ > +{ \ > + int i; \ > + \ > + for (i = 0; i < ARRAY_SIZE(hns3_lm_map); i++) { \ > + if ((caps) & hns3_lm_map[i].hns3_link_mode) \ > + __set_bit(hns3_lm_map[i].ethtool_link_mode,\ > + (lk_ksettings)->link_modes.name); \ > + } \ > +} How about making this an inline function such that you would get proper type checking? > + > +static int hns3_get_sset_count(struct net_device *netdev, int stringset) > +{ > + struct hns3_nic_priv *priv = netdev_priv(netdev); > + struct hnae3_handle *h = priv->ae_handle; > + const struct hnae3_ae_ops *ops = h->ae_algo->ops; > + > + if (!ops->get_sset_count) { > + netdev_err(netdev, "could not get string set count\n"); > + return -EOPNOTSUPP; > + } Is it really worth the error message? This might be called several times during the driver's lifecycle. > + > + switch (stringset) { > + case ETH_SS_STATS: > + return (HNS3_NETDEV_STATS_COUNT + > + (HNS3_TQP_STATS_COUNT * h->kinfo.num_tqps) + > + ops->get_sset_count(h, stringset)); > + > + case ETH_SS_TEST: > + return ops->get_sset_count(h, stringset); > + } > + > + return 0; > +} > + > +static u8 *hns3_get_strings_netdev(u8 *data) > +{ > + int i; unsigned int i. > + > + for (i = 0; i < HNS3_NETDEV_STATS_COUNT; i++) { > + memcpy(data, hns3_netdev_stats[i].stats_string, > + ETH_GSTRING_LEN); > + data += ETH_GSTRING_LEN; > + } > + > + return data; > +} > + > +static u8 *hns3_get_strings_tqps(struct hnae3_handle *handle, u8 *data) > +{ > + struct hnae3_knic_private_info *kinfo = &handle->kinfo; > + int i, j; Likewise, unsigned int i, j. > + > + /* get strings for Tx */ > + for (i = 0; i < kinfo->num_tqps; i++) { > + for (j = 0; j < HNS3_TXQ_STATS_COUNT; j++) { > + u8 gstr[ETH_GSTRING_LEN]; char gstr[ETH_GSTRING_LEN] and you can move it out of the loop since it is just a temporary buffer for both loops here. > + > + sprintf(gstr, "rcb_q%d_", i); snprintf() just to be on the safe side. > + strcat(gstr, hns3_txq_stats[j].stats_string); > + > + memcpy(data, gstr, ETH_GSTRING_LEN); What ensures that you are NULL terminating this string? > + data += ETH_GSTRING_LEN; > + } > + } > + > + /* get strings for Rx */ > + for (i = 0; i < kinfo->num_tqps; i++) { > + for (j = 0; j < HNS3_RXQ_STATS_COUNT; j++) { > + u8 gstr[ETH_GSTRING_LEN]; > + > + sprintf(gstr, "rcb_q%d_", i); > + strcat(gstr, hns3_rxq_stats[j].stats_string); > + > + memcpy(data, gstr, ETH_GSTRING_LEN); > + data += ETH_GSTRING_LEN; > + } > + } > + > + return data; > +} > + > +static void hns3_get_strings(struct net_device *netdev, u32 stringset, u8 *data) > +{ > + struct hns3_nic_priv *priv = netdev_priv(netdev); > + struct hnae3_handle *h = priv->ae_handle; > + const struct hnae3_ae_ops *ops = h->ae_algo->ops; > + char *buff = (char *)data; > + > + if (!ops->get_strings) { > + netdev_err(netdev, "could not get strings!\n"); > + return; > + } Same here, does not sound like something you would want to print more than once? > + > + switch (stringset) { > + case ETH_SS_STATS: > + buff = hns3_get_strings_netdev(buff); > + buff = hns3_get_strings_tqps(h, buff); > + h->ae_algo->ops->get_strings(h, stringset, (u8 *)buff); > + break; > + case ETH_SS_TEST: > + ops->get_strings(h, stringset, data); > + break; > + } > +} > + > +static u64 *hns3_get_stats_netdev(struct net_device *netdev, u64 *data) > +{ You should implement the 64-bit version of this. > + const struct rtnl_link_stats64 *net_stats; > + struct rtnl_link_stats64 temp; > + u8 *stat; > + int i; unsigned int i > + > + net_stats = dev_get_stats(netdev, &temp); > + > + for (i = 0; i < HNS3_NETDEV_STATS_COUNT; i++) { > + stat = (u8 *)net_stats + hns3_netdev_stats[i].stats_offset; > + *data++ = *(u64 *)stat; > + } > + > + return data; > +} > + > +static u64 *hns3_get_stats_tqps(struct hnae3_handle *handle, u64 *data) > +{ > + struct hns3_nic_priv *nic_priv = (struct hns3_nic_priv *)handle->priv; > + struct hnae3_knic_private_info *kinfo = &handle->kinfo; > + struct hns3_enet_ring *ring; > + u8 *stat; > + int i; Same here. > + > + /* get stats for Tx */ > + for (i = 0; i < kinfo->num_tqps; i++) { > + ring = nic_priv->ring_data[i].ring; > + for (i = 0; i < HNS3_TXQ_STATS_COUNT; i++) { > + stat = (u8 *)ring + hns3_txq_stats[i].stats_offset; > + *data++ = *(u64 *)stat; > + } > + } > + > + /* get stats for Rx */ > + for (i = 0; i < kinfo->num_tqps; i++) { > + ring = nic_priv->ring_data[i + kinfo->num_tqps].ring; > + for (i = 0; i < HNS3_RXQ_STATS_COUNT; i++) { > + stat = (u8 *)ring + hns3_rxq_stats[i].stats_offset; > + *data++ = *(u64 *)stat; > + } > + } > + > + return data; > +} > + > +/* hns3_get_stats - get detail statistics. > + * @netdev: net device > + * @stats: statistics info. > + * @data: statistics data. > + */ > +void hns3_get_stats(struct net_device *netdev, struct ethtool_stats *stats, > + u64 *data) > +{ > + struct hns3_nic_priv *priv = netdev_priv(netdev); > + struct hnae3_handle *h = priv->ae_handle; > + u64 *p = data; > + > + if (!h->ae_algo->ops->get_stats || !h->ae_algo->ops->update_stats) { > + netdev_err(netdev, "could not get any statistics\n"); > + return; > + } > + > + h->ae_algo->ops->update_stats(h, &netdev->stats); > + > + /* get netdev related stats */ > + p = hns3_get_stats_netdev(netdev, p); > + > + /* get per-queue stats */ > + p = hns3_get_stats_tqps(h, p); > + > + /* get MAC & other misc hardware stats */ > + h->ae_algo->ops->get_stats(h, p); > +} > + > +static void hns3_get_drvinfo(struct net_device *netdev, > + struct ethtool_drvinfo *drvinfo) > +{ > + struct hns3_nic_priv *priv = netdev_priv(netdev); > + struct hnae3_handle *h = priv->ae_handle; > + > + strncpy(drvinfo->version, HNAE_DRIVER_VERSION, > + sizeof(drvinfo->version)); > + drvinfo->version[sizeof(drvinfo->version) - 1] = '\0'; strlcpy() would probably do that for you. > + > + strncpy(drvinfo->driver, HNAE_DRIVER_NAME, sizeof(drvinfo->driver)); > + drvinfo->driver[sizeof(drvinfo->driver) - 1] = '\0'; Same here > + > + strncpy(drvinfo->bus_info, priv->dev->bus->name, > + sizeof(drvinfo->bus_info));> + drvinfo->bus_info[ETHTOOL_BUSINFO_LEN - 1] = '\0'; And here. The rest looked fine. -- Florian