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