285 lines
8.1 KiB
C
285 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2022-2023 NXP
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*/
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#include "common.h"
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#include "netlink.h"
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struct mm_req_info {
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struct ethnl_req_info base;
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};
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struct mm_reply_data {
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struct ethnl_reply_data base;
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struct ethtool_mm_state state;
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struct ethtool_mm_stats stats;
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};
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#define MM_REPDATA(__reply_base) \
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container_of(__reply_base, struct mm_reply_data, base)
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#define ETHTOOL_MM_STAT_CNT \
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(__ETHTOOL_A_MM_STAT_CNT - (ETHTOOL_A_MM_STAT_PAD + 1))
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const struct nla_policy ethnl_mm_get_policy[ETHTOOL_A_MM_HEADER + 1] = {
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[ETHTOOL_A_MM_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_stats),
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};
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static int mm_prepare_data(const struct ethnl_req_info *req_base,
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struct ethnl_reply_data *reply_base,
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const struct genl_info *info)
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{
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struct mm_reply_data *data = MM_REPDATA(reply_base);
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struct net_device *dev = reply_base->dev;
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const struct ethtool_ops *ops;
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int ret;
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ops = dev->ethtool_ops;
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if (!ops->get_mm)
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return -EOPNOTSUPP;
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ethtool_stats_init((u64 *)&data->stats,
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sizeof(data->stats) / sizeof(u64));
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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return ret;
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ret = ops->get_mm(dev, &data->state);
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if (ret)
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goto out_complete;
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if (ops->get_mm_stats && (req_base->flags & ETHTOOL_FLAG_STATS))
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ops->get_mm_stats(dev, &data->stats);
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out_complete:
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ethnl_ops_complete(dev);
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return ret;
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}
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static int mm_reply_size(const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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int len = 0;
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len += nla_total_size(sizeof(u8)); /* _MM_PMAC_ENABLED */
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len += nla_total_size(sizeof(u8)); /* _MM_TX_ENABLED */
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len += nla_total_size(sizeof(u8)); /* _MM_TX_ACTIVE */
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len += nla_total_size(sizeof(u8)); /* _MM_VERIFY_ENABLED */
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len += nla_total_size(sizeof(u8)); /* _MM_VERIFY_STATUS */
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len += nla_total_size(sizeof(u32)); /* _MM_VERIFY_TIME */
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len += nla_total_size(sizeof(u32)); /* _MM_MAX_VERIFY_TIME */
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len += nla_total_size(sizeof(u32)); /* _MM_TX_MIN_FRAG_SIZE */
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len += nla_total_size(sizeof(u32)); /* _MM_RX_MIN_FRAG_SIZE */
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if (req_base->flags & ETHTOOL_FLAG_STATS)
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len += nla_total_size(0) + /* _MM_STATS */
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nla_total_size_64bit(sizeof(u64)) * ETHTOOL_MM_STAT_CNT;
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return len;
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}
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static int mm_put_stat(struct sk_buff *skb, u64 val, u16 attrtype)
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{
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if (val == ETHTOOL_STAT_NOT_SET)
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return 0;
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if (nla_put_u64_64bit(skb, attrtype, val, ETHTOOL_A_MM_STAT_PAD))
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return -EMSGSIZE;
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return 0;
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}
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static int mm_put_stats(struct sk_buff *skb,
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const struct ethtool_mm_stats *stats)
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{
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struct nlattr *nest;
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nest = nla_nest_start(skb, ETHTOOL_A_MM_STATS);
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if (!nest)
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return -EMSGSIZE;
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if (mm_put_stat(skb, stats->MACMergeFrameAssErrorCount,
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ETHTOOL_A_MM_STAT_REASSEMBLY_ERRORS) ||
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mm_put_stat(skb, stats->MACMergeFrameSmdErrorCount,
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ETHTOOL_A_MM_STAT_SMD_ERRORS) ||
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mm_put_stat(skb, stats->MACMergeFrameAssOkCount,
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ETHTOOL_A_MM_STAT_REASSEMBLY_OK) ||
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mm_put_stat(skb, stats->MACMergeFragCountRx,
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ETHTOOL_A_MM_STAT_RX_FRAG_COUNT) ||
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mm_put_stat(skb, stats->MACMergeFragCountTx,
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ETHTOOL_A_MM_STAT_TX_FRAG_COUNT) ||
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mm_put_stat(skb, stats->MACMergeHoldCount,
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ETHTOOL_A_MM_STAT_HOLD_COUNT))
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goto err_cancel;
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nla_nest_end(skb, nest);
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return 0;
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err_cancel:
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nla_nest_cancel(skb, nest);
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return -EMSGSIZE;
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}
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static int mm_fill_reply(struct sk_buff *skb,
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const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct mm_reply_data *data = MM_REPDATA(reply_base);
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const struct ethtool_mm_state *state = &data->state;
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if (nla_put_u8(skb, ETHTOOL_A_MM_TX_ENABLED, state->tx_enabled) ||
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nla_put_u8(skb, ETHTOOL_A_MM_TX_ACTIVE, state->tx_active) ||
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nla_put_u8(skb, ETHTOOL_A_MM_PMAC_ENABLED, state->pmac_enabled) ||
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nla_put_u8(skb, ETHTOOL_A_MM_VERIFY_ENABLED, state->verify_enabled) ||
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nla_put_u8(skb, ETHTOOL_A_MM_VERIFY_STATUS, state->verify_status) ||
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nla_put_u32(skb, ETHTOOL_A_MM_VERIFY_TIME, state->verify_time) ||
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nla_put_u32(skb, ETHTOOL_A_MM_MAX_VERIFY_TIME, state->max_verify_time) ||
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nla_put_u32(skb, ETHTOOL_A_MM_TX_MIN_FRAG_SIZE, state->tx_min_frag_size) ||
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nla_put_u32(skb, ETHTOOL_A_MM_RX_MIN_FRAG_SIZE, state->rx_min_frag_size))
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return -EMSGSIZE;
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if (req_base->flags & ETHTOOL_FLAG_STATS &&
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mm_put_stats(skb, &data->stats))
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return -EMSGSIZE;
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return 0;
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}
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const struct nla_policy ethnl_mm_set_policy[ETHTOOL_A_MM_MAX + 1] = {
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[ETHTOOL_A_MM_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
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[ETHTOOL_A_MM_VERIFY_ENABLED] = NLA_POLICY_MAX(NLA_U8, 1),
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[ETHTOOL_A_MM_VERIFY_TIME] = NLA_POLICY_RANGE(NLA_U32, 1, 128),
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[ETHTOOL_A_MM_TX_ENABLED] = NLA_POLICY_MAX(NLA_U8, 1),
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[ETHTOOL_A_MM_PMAC_ENABLED] = NLA_POLICY_MAX(NLA_U8, 1),
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[ETHTOOL_A_MM_TX_MIN_FRAG_SIZE] = NLA_POLICY_RANGE(NLA_U32, 60, 252),
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};
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static void mm_state_to_cfg(const struct ethtool_mm_state *state,
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struct ethtool_mm_cfg *cfg)
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{
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/* We could also compare state->verify_status against
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* ETHTOOL_MM_VERIFY_STATUS_DISABLED, but state->verify_enabled
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* is more like an administrative state which should be seen in
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* ETHTOOL_MSG_MM_GET replies. For example, a port with verification
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* disabled might be in the ETHTOOL_MM_VERIFY_STATUS_INITIAL
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* if it's down.
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*/
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cfg->verify_enabled = state->verify_enabled;
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cfg->verify_time = state->verify_time;
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cfg->tx_enabled = state->tx_enabled;
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cfg->pmac_enabled = state->pmac_enabled;
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cfg->tx_min_frag_size = state->tx_min_frag_size;
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}
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static int
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ethnl_set_mm_validate(struct ethnl_req_info *req_info, struct genl_info *info)
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{
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const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
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return ops->get_mm && ops->set_mm ? 1 : -EOPNOTSUPP;
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}
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static int ethnl_set_mm(struct ethnl_req_info *req_info, struct genl_info *info)
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{
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struct netlink_ext_ack *extack = info->extack;
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struct net_device *dev = req_info->dev;
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struct ethtool_mm_state state = {};
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struct nlattr **tb = info->attrs;
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struct ethtool_mm_cfg cfg = {};
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bool mod = false;
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int ret;
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ret = dev->ethtool_ops->get_mm(dev, &state);
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if (ret)
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return ret;
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mm_state_to_cfg(&state, &cfg);
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ethnl_update_bool(&cfg.verify_enabled, tb[ETHTOOL_A_MM_VERIFY_ENABLED],
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&mod);
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ethnl_update_u32(&cfg.verify_time, tb[ETHTOOL_A_MM_VERIFY_TIME], &mod);
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ethnl_update_bool(&cfg.tx_enabled, tb[ETHTOOL_A_MM_TX_ENABLED], &mod);
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ethnl_update_bool(&cfg.pmac_enabled, tb[ETHTOOL_A_MM_PMAC_ENABLED],
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&mod);
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ethnl_update_u32(&cfg.tx_min_frag_size,
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tb[ETHTOOL_A_MM_TX_MIN_FRAG_SIZE], &mod);
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if (!mod)
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return 0;
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if (cfg.verify_time > state.max_verify_time) {
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NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_MM_VERIFY_TIME],
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"verifyTime exceeds device maximum");
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return -ERANGE;
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}
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if (cfg.verify_enabled && !cfg.tx_enabled) {
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NL_SET_ERR_MSG(extack, "Verification requires TX enabled");
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return -EINVAL;
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}
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if (cfg.tx_enabled && !cfg.pmac_enabled) {
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NL_SET_ERR_MSG(extack, "TX enabled requires pMAC enabled");
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return -EINVAL;
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}
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ret = dev->ethtool_ops->set_mm(dev, &cfg, extack);
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return ret < 0 ? ret : 1;
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}
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const struct ethnl_request_ops ethnl_mm_request_ops = {
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.request_cmd = ETHTOOL_MSG_MM_GET,
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.reply_cmd = ETHTOOL_MSG_MM_GET_REPLY,
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.hdr_attr = ETHTOOL_A_MM_HEADER,
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.req_info_size = sizeof(struct mm_req_info),
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.reply_data_size = sizeof(struct mm_reply_data),
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.prepare_data = mm_prepare_data,
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.reply_size = mm_reply_size,
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.fill_reply = mm_fill_reply,
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.set_validate = ethnl_set_mm_validate,
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.set = ethnl_set_mm,
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.set_ntf_cmd = ETHTOOL_MSG_MM_NTF,
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};
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/* Returns whether a given device supports the MAC merge layer
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* (has an eMAC and a pMAC). Must be called under rtnl_lock() and
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* ethnl_ops_begin().
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*/
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bool __ethtool_dev_mm_supported(struct net_device *dev)
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{
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const struct ethtool_ops *ops = dev->ethtool_ops;
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struct ethtool_mm_state state = {};
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int ret = -EOPNOTSUPP;
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if (ops && ops->get_mm)
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ret = ops->get_mm(dev, &state);
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return !ret;
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}
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bool ethtool_dev_mm_supported(struct net_device *dev)
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{
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const struct ethtool_ops *ops = dev->ethtool_ops;
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bool supported;
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int ret;
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ASSERT_RTNL();
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if (!ops)
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return false;
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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return false;
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supported = __ethtool_dev_mm_supported(dev);
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ethnl_ops_complete(dev);
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return supported;
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}
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EXPORT_SYMBOL_GPL(ethtool_dev_mm_supported);
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