diff options
Diffstat (limited to 'net/ethtool/pause.c')
| -rw-r--r-- | net/ethtool/pause.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/net/ethtool/pause.c b/net/ethtool/pause.c new file mode 100644 index 000000000..f7c847aeb --- /dev/null +++ b/net/ethtool/pause.c @@ -0,0 +1,218 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include "netlink.h" +#include "common.h" + +struct pause_req_info { + struct ethnl_req_info base; + enum ethtool_mac_stats_src src; +}; + +#define PAUSE_REQINFO(__req_base) \ + container_of(__req_base, struct pause_req_info, base) + +struct pause_reply_data { + struct ethnl_reply_data base; + struct ethtool_pauseparam pauseparam; + struct ethtool_pause_stats pausestat; +}; + +#define PAUSE_REPDATA(__reply_base) \ + container_of(__reply_base, struct pause_reply_data, base) + +const struct nla_policy ethnl_pause_get_policy[] = { + [ETHTOOL_A_PAUSE_HEADER] = + NLA_POLICY_NESTED(ethnl_header_policy_stats), + [ETHTOOL_A_PAUSE_STATS_SRC] = + NLA_POLICY_MAX(NLA_U32, ETHTOOL_MAC_STATS_SRC_PMAC), +}; + +static int pause_parse_request(struct ethnl_req_info *req_base, + struct nlattr **tb, + struct netlink_ext_ack *extack) +{ + enum ethtool_mac_stats_src src = ETHTOOL_MAC_STATS_SRC_AGGREGATE; + struct pause_req_info *req_info = PAUSE_REQINFO(req_base); + + if (tb[ETHTOOL_A_PAUSE_STATS_SRC]) { + if (!(req_base->flags & ETHTOOL_FLAG_STATS)) { + NL_SET_ERR_MSG_MOD(extack, + "ETHTOOL_FLAG_STATS must be set when requesting a source of stats"); + return -EINVAL; + } + + src = nla_get_u32(tb[ETHTOOL_A_PAUSE_STATS_SRC]); + } + + req_info->src = src; + + return 0; +} + +static int pause_prepare_data(const struct ethnl_req_info *req_base, + struct ethnl_reply_data *reply_base, + const struct genl_info *info) +{ + const struct pause_req_info *req_info = PAUSE_REQINFO(req_base); + struct pause_reply_data *data = PAUSE_REPDATA(reply_base); + enum ethtool_mac_stats_src src = req_info->src; + struct net_device *dev = reply_base->dev; + int ret; + + if (!dev->ethtool_ops->get_pauseparam) + return -EOPNOTSUPP; + + ethtool_stats_init((u64 *)&data->pausestat, + sizeof(data->pausestat) / 8); + data->pausestat.src = src; + + ret = ethnl_ops_begin(dev); + if (ret < 0) + return ret; + + if ((src == ETHTOOL_MAC_STATS_SRC_EMAC || + src == ETHTOOL_MAC_STATS_SRC_PMAC) && + !__ethtool_dev_mm_supported(dev)) { + NL_SET_ERR_MSG_MOD(info->extack, + "Device does not support MAC merge layer"); + ethnl_ops_complete(dev); + return -EOPNOTSUPP; + } + + dev->ethtool_ops->get_pauseparam(dev, &data->pauseparam); + if (req_base->flags & ETHTOOL_FLAG_STATS && + dev->ethtool_ops->get_pause_stats) + dev->ethtool_ops->get_pause_stats(dev, &data->pausestat); + + ethnl_ops_complete(dev); + + return 0; +} + +static int pause_reply_size(const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + int n = nla_total_size(sizeof(u8)) + /* _PAUSE_AUTONEG */ + nla_total_size(sizeof(u8)) + /* _PAUSE_RX */ + nla_total_size(sizeof(u8)); /* _PAUSE_TX */ + + if (req_base->flags & ETHTOOL_FLAG_STATS) + n += nla_total_size(0) + /* _PAUSE_STATS */ + nla_total_size(sizeof(u32)) + /* _PAUSE_STATS_SRC */ + nla_total_size_64bit(sizeof(u64)) * ETHTOOL_PAUSE_STAT_CNT; + return n; +} + +static int ethtool_put_stat(struct sk_buff *skb, u64 val, u16 attrtype, + u16 padtype) +{ + if (val == ETHTOOL_STAT_NOT_SET) + return 0; + if (nla_put_u64_64bit(skb, attrtype, val, padtype)) + return -EMSGSIZE; + + return 0; +} + +static int pause_put_stats(struct sk_buff *skb, + const struct ethtool_pause_stats *pause_stats) +{ + const u16 pad = ETHTOOL_A_PAUSE_STAT_PAD; + struct nlattr *nest; + + if (nla_put_u32(skb, ETHTOOL_A_PAUSE_STATS_SRC, pause_stats->src)) + return -EMSGSIZE; + + nest = nla_nest_start(skb, ETHTOOL_A_PAUSE_STATS); + if (!nest) + return -EMSGSIZE; + + if (ethtool_put_stat(skb, pause_stats->tx_pause_frames, + ETHTOOL_A_PAUSE_STAT_TX_FRAMES, pad) || + ethtool_put_stat(skb, pause_stats->rx_pause_frames, + ETHTOOL_A_PAUSE_STAT_RX_FRAMES, pad)) + goto err_cancel; + + nla_nest_end(skb, nest); + return 0; + +err_cancel: + nla_nest_cancel(skb, nest); + return -EMSGSIZE; +} + +static int pause_fill_reply(struct sk_buff *skb, + const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + const struct pause_reply_data *data = PAUSE_REPDATA(reply_base); + const struct ethtool_pauseparam *pauseparam = &data->pauseparam; + + if (nla_put_u8(skb, ETHTOOL_A_PAUSE_AUTONEG, !!pauseparam->autoneg) || + nla_put_u8(skb, ETHTOOL_A_PAUSE_RX, !!pauseparam->rx_pause) || + nla_put_u8(skb, ETHTOOL_A_PAUSE_TX, !!pauseparam->tx_pause)) + return -EMSGSIZE; + + if (req_base->flags & ETHTOOL_FLAG_STATS && + pause_put_stats(skb, &data->pausestat)) + return -EMSGSIZE; + + return 0; +} + +/* PAUSE_SET */ + +const struct nla_policy ethnl_pause_set_policy[] = { + [ETHTOOL_A_PAUSE_HEADER] = + NLA_POLICY_NESTED(ethnl_header_policy), + [ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_U8 }, + [ETHTOOL_A_PAUSE_RX] = { .type = NLA_U8 }, + [ETHTOOL_A_PAUSE_TX] = { .type = NLA_U8 }, +}; + +static int +ethnl_set_pause_validate(struct ethnl_req_info *req_info, + struct genl_info *info) +{ + const struct ethtool_ops *ops = req_info->dev->ethtool_ops; + + return ops->get_pauseparam && ops->set_pauseparam ? 1 : -EOPNOTSUPP; +} + +static int +ethnl_set_pause(struct ethnl_req_info *req_info, struct genl_info *info) +{ + struct net_device *dev = req_info->dev; + struct ethtool_pauseparam params = {}; + struct nlattr **tb = info->attrs; + bool mod = false; + int ret; + + dev->ethtool_ops->get_pauseparam(dev, ¶ms); + + ethnl_update_bool32(¶ms.autoneg, tb[ETHTOOL_A_PAUSE_AUTONEG], &mod); + ethnl_update_bool32(¶ms.rx_pause, tb[ETHTOOL_A_PAUSE_RX], &mod); + ethnl_update_bool32(¶ms.tx_pause, tb[ETHTOOL_A_PAUSE_TX], &mod); + if (!mod) + return 0; + + ret = dev->ethtool_ops->set_pauseparam(dev, ¶ms); + return ret < 0 ? ret : 1; +} + +const struct ethnl_request_ops ethnl_pause_request_ops = { + .request_cmd = ETHTOOL_MSG_PAUSE_GET, + .reply_cmd = ETHTOOL_MSG_PAUSE_GET_REPLY, + .hdr_attr = ETHTOOL_A_PAUSE_HEADER, + .req_info_size = sizeof(struct pause_req_info), + .reply_data_size = sizeof(struct pause_reply_data), + + .parse_request = pause_parse_request, + .prepare_data = pause_prepare_data, + .reply_size = pause_reply_size, + .fill_reply = pause_fill_reply, + + .set_validate = ethnl_set_pause_validate, + .set = ethnl_set_pause, + .set_ntf_cmd = ETHTOOL_MSG_PAUSE_NTF, +}; |