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// SPDX-License-Identifier: GPL-2.0-only
#include "netlink.h"
#include "common.h"
#include "bitset.h"
struct fec_req_info {
struct ethnl_req_info base;
};
struct fec_reply_data {
struct ethnl_reply_data base;
__ETHTOOL_DECLARE_LINK_MODE_MASK(fec_link_modes);
u32 active_fec;
u8 fec_auto;
};
#define FEC_REPDATA(__reply_base) \
container_of(__reply_base, struct fec_reply_data, base)
#define ETHTOOL_FEC_MASK ((ETHTOOL_FEC_LLRS << 1) - 1)
const struct nla_policy ethnl_fec_get_policy[ETHTOOL_A_FEC_HEADER + 1] = {
[ETHTOOL_A_FEC_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
};
static void
ethtool_fec_to_link_modes(u32 fec, unsigned long *link_modes, u8 *fec_auto)
{
if (fec_auto)
*fec_auto = !!(fec & ETHTOOL_FEC_AUTO);
if (fec & ETHTOOL_FEC_OFF)
__set_bit(ETHTOOL_LINK_MODE_FEC_NONE_BIT, link_modes);
if (fec & ETHTOOL_FEC_RS)
__set_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, link_modes);
if (fec & ETHTOOL_FEC_BASER)
__set_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT, link_modes);
if (fec & ETHTOOL_FEC_LLRS)
__set_bit(ETHTOOL_LINK_MODE_FEC_LLRS_BIT, link_modes);
}
static int
ethtool_link_modes_to_fecparam(struct ethtool_fecparam *fec,
unsigned long *link_modes, u8 fec_auto)
{
memset(fec, 0, sizeof(*fec));
if (fec_auto)
fec->fec |= ETHTOOL_FEC_AUTO;
if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_NONE_BIT, link_modes))
fec->fec |= ETHTOOL_FEC_OFF;
if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, link_modes))
fec->fec |= ETHTOOL_FEC_RS;
if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT, link_modes))
fec->fec |= ETHTOOL_FEC_BASER;
if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_LLRS_BIT, link_modes))
fec->fec |= ETHTOOL_FEC_LLRS;
if (!bitmap_empty(link_modes, __ETHTOOL_LINK_MODE_MASK_NBITS))
return -EINVAL;
return 0;
}
static int fec_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(active_fec_modes) = {};
struct fec_reply_data *data = FEC_REPDATA(reply_base);
struct net_device *dev = reply_base->dev;
struct ethtool_fecparam fec = {};
int ret;
if (!dev->ethtool_ops->get_fecparam)
return -EOPNOTSUPP;
ret = ethnl_ops_begin(dev);
if (ret < 0)
return ret;
ret = dev->ethtool_ops->get_fecparam(dev, &fec);
if (ret)
goto out_complete;
WARN_ON_ONCE(fec.reserved);
ethtool_fec_to_link_modes(fec.fec, data->fec_link_modes,
&data->fec_auto);
ethtool_fec_to_link_modes(fec.active_fec, active_fec_modes, NULL);
data->active_fec = find_first_bit(active_fec_modes,
__ETHTOOL_LINK_MODE_MASK_NBITS);
/* Don't report attr if no FEC mode set. Note that
* ethtool_fecparam_to_link_modes() ignores NONE and AUTO.
*/
if (data->active_fec == __ETHTOOL_LINK_MODE_MASK_NBITS)
data->active_fec = 0;
out_complete:
ethnl_ops_complete(dev);
return ret;
}
static int fec_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
const struct fec_reply_data *data = FEC_REPDATA(reply_base);
int len = 0;
int ret;
ret = ethnl_bitset_size(data->fec_link_modes, NULL,
__ETHTOOL_LINK_MODE_MASK_NBITS,
link_mode_names, compact);
if (ret < 0)
return ret;
len += ret;
len += nla_total_size(sizeof(u8)) + /* _FEC_AUTO */
nla_total_size(sizeof(u32)); /* _FEC_ACTIVE */
return len;
}
static int fec_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
const struct fec_reply_data *data = FEC_REPDATA(reply_base);
int ret;
ret = ethnl_put_bitset(skb, ETHTOOL_A_FEC_MODES,
data->fec_link_modes, NULL,
__ETHTOOL_LINK_MODE_MASK_NBITS,
link_mode_names, compact);
if (ret < 0)
return ret;
if (nla_put_u8(skb, ETHTOOL_A_FEC_AUTO, data->fec_auto) ||
(data->active_fec &&
nla_put_u32(skb, ETHTOOL_A_FEC_ACTIVE, data->active_fec)))
return -EMSGSIZE;
return 0;
}
const struct ethnl_request_ops ethnl_fec_request_ops = {
.request_cmd = ETHTOOL_MSG_FEC_GET,
.reply_cmd = ETHTOOL_MSG_FEC_GET_REPLY,
.hdr_attr = ETHTOOL_A_FEC_HEADER,
.req_info_size = sizeof(struct fec_req_info),
.reply_data_size = sizeof(struct fec_reply_data),
.prepare_data = fec_prepare_data,
.reply_size = fec_reply_size,
.fill_reply = fec_fill_reply,
};
/* FEC_SET */
const struct nla_policy ethnl_fec_set_policy[ETHTOOL_A_FEC_AUTO + 1] = {
[ETHTOOL_A_FEC_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
[ETHTOOL_A_FEC_MODES] = { .type = NLA_NESTED },
[ETHTOOL_A_FEC_AUTO] = NLA_POLICY_MAX(NLA_U8, 1),
};
int ethnl_set_fec(struct sk_buff *skb, struct genl_info *info)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(fec_link_modes) = {};
struct ethnl_req_info req_info = {};
struct nlattr **tb = info->attrs;
struct ethtool_fecparam fec = {};
const struct ethtool_ops *ops;
struct net_device *dev;
bool mod = false;
u8 fec_auto;
int ret;
ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_FEC_HEADER],
genl_info_net(info), info->extack,
true);
if (ret < 0)
return ret;
dev = req_info.dev;
ops = dev->ethtool_ops;
ret = -EOPNOTSUPP;
if (!ops->get_fecparam || !ops->set_fecparam)
goto out_dev;
rtnl_lock();
ret = ethnl_ops_begin(dev);
if (ret < 0)
goto out_rtnl;
ret = ops->get_fecparam(dev, &fec);
if (ret < 0)
goto out_ops;
ethtool_fec_to_link_modes(fec.fec, fec_link_modes, &fec_auto);
ret = ethnl_update_bitset(fec_link_modes,
__ETHTOOL_LINK_MODE_MASK_NBITS,
tb[ETHTOOL_A_FEC_MODES],
link_mode_names, info->extack, &mod);
if (ret < 0)
goto out_ops;
ethnl_update_u8(&fec_auto, tb[ETHTOOL_A_FEC_AUTO], &mod);
ret = 0;
if (!mod)
goto out_ops;
ret = ethtool_link_modes_to_fecparam(&fec, fec_link_modes, fec_auto);
if (ret) {
NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_FEC_MODES],
"invalid FEC modes requested");
goto out_ops;
}
if (!fec.fec) {
ret = -EINVAL;
NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_FEC_MODES],
"no FEC modes set");
goto out_ops;
}
ret = dev->ethtool_ops->set_fecparam(dev, &fec);
if (ret < 0)
goto out_ops;
ethtool_notify(dev, ETHTOOL_MSG_FEC_NTF, NULL);
out_ops:
ethnl_ops_complete(dev);
out_rtnl:
rtnl_unlock();
out_dev:
dev_put(dev);
return ret;
}
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