| // SPDX-License-Identifier: GPL-2.0-only |
| |
| #include "netlink.h" |
| #include "common.h" |
| |
| struct rings_req_info { |
| struct ethnl_req_info base; |
| }; |
| |
| struct rings_reply_data { |
| struct ethnl_reply_data base; |
| struct ethtool_ringparam ringparam; |
| struct kernel_ethtool_ringparam kernel_ringparam; |
| u32 supported_ring_params; |
| }; |
| |
| #define RINGS_REPDATA(__reply_base) \ |
| container_of(__reply_base, struct rings_reply_data, base) |
| |
| const struct nla_policy ethnl_rings_get_policy[] = { |
| [ETHTOOL_A_RINGS_HEADER] = |
| NLA_POLICY_NESTED(ethnl_header_policy), |
| }; |
| |
| static int rings_prepare_data(const struct ethnl_req_info *req_base, |
| struct ethnl_reply_data *reply_base, |
| const struct genl_info *info) |
| { |
| struct rings_reply_data *data = RINGS_REPDATA(reply_base); |
| struct net_device *dev = reply_base->dev; |
| int ret; |
| |
| if (!dev->ethtool_ops->get_ringparam) |
| return -EOPNOTSUPP; |
| |
| data->supported_ring_params = dev->ethtool_ops->supported_ring_params; |
| ret = ethnl_ops_begin(dev); |
| if (ret < 0) |
| return ret; |
| dev->ethtool_ops->get_ringparam(dev, &data->ringparam, |
| &data->kernel_ringparam, info->extack); |
| ethnl_ops_complete(dev); |
| |
| return 0; |
| } |
| |
| static int rings_reply_size(const struct ethnl_req_info *req_base, |
| const struct ethnl_reply_data *reply_base) |
| { |
| return nla_total_size(sizeof(u32)) + /* _RINGS_RX_MAX */ |
| nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI_MAX */ |
| nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO_MAX */ |
| nla_total_size(sizeof(u32)) + /* _RINGS_TX_MAX */ |
| nla_total_size(sizeof(u32)) + /* _RINGS_RX */ |
| nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI */ |
| nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO */ |
| nla_total_size(sizeof(u32)) + /* _RINGS_TX */ |
| nla_total_size(sizeof(u32)) + /* _RINGS_RX_BUF_LEN */ |
| nla_total_size(sizeof(u8)) + /* _RINGS_TCP_DATA_SPLIT */ |
| nla_total_size(sizeof(u32) + /* _RINGS_CQE_SIZE */ |
| nla_total_size(sizeof(u8)) + /* _RINGS_TX_PUSH */ |
| nla_total_size(sizeof(u8))) + /* _RINGS_RX_PUSH */ |
| nla_total_size(sizeof(u32)) + /* _RINGS_TX_PUSH_BUF_LEN */ |
| nla_total_size(sizeof(u32)); /* _RINGS_TX_PUSH_BUF_LEN_MAX */ |
| } |
| |
| static int rings_fill_reply(struct sk_buff *skb, |
| const struct ethnl_req_info *req_base, |
| const struct ethnl_reply_data *reply_base) |
| { |
| const struct rings_reply_data *data = RINGS_REPDATA(reply_base); |
| const struct kernel_ethtool_ringparam *kr = &data->kernel_ringparam; |
| const struct ethtool_ringparam *ringparam = &data->ringparam; |
| u32 supported_ring_params = data->supported_ring_params; |
| |
| WARN_ON(kr->tcp_data_split > ETHTOOL_TCP_DATA_SPLIT_ENABLED); |
| |
| if ((ringparam->rx_max_pending && |
| (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX, |
| ringparam->rx_max_pending) || |
| nla_put_u32(skb, ETHTOOL_A_RINGS_RX, |
| ringparam->rx_pending))) || |
| (ringparam->rx_mini_max_pending && |
| (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX, |
| ringparam->rx_mini_max_pending) || |
| nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI, |
| ringparam->rx_mini_pending))) || |
| (ringparam->rx_jumbo_max_pending && |
| (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX, |
| ringparam->rx_jumbo_max_pending) || |
| nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO, |
| ringparam->rx_jumbo_pending))) || |
| (ringparam->tx_max_pending && |
| (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX, |
| ringparam->tx_max_pending) || |
| nla_put_u32(skb, ETHTOOL_A_RINGS_TX, |
| ringparam->tx_pending))) || |
| (kr->rx_buf_len && |
| (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_BUF_LEN, kr->rx_buf_len))) || |
| (kr->tcp_data_split && |
| (nla_put_u8(skb, ETHTOOL_A_RINGS_TCP_DATA_SPLIT, |
| kr->tcp_data_split))) || |
| (kr->cqe_size && |
| (nla_put_u32(skb, ETHTOOL_A_RINGS_CQE_SIZE, kr->cqe_size))) || |
| nla_put_u8(skb, ETHTOOL_A_RINGS_TX_PUSH, !!kr->tx_push) || |
| nla_put_u8(skb, ETHTOOL_A_RINGS_RX_PUSH, !!kr->rx_push) || |
| ((supported_ring_params & ETHTOOL_RING_USE_TX_PUSH_BUF_LEN) && |
| (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN_MAX, |
| kr->tx_push_buf_max_len) || |
| nla_put_u32(skb, ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN, |
| kr->tx_push_buf_len)))) |
| return -EMSGSIZE; |
| |
| return 0; |
| } |
| |
| /* RINGS_SET */ |
| |
| const struct nla_policy ethnl_rings_set_policy[] = { |
| [ETHTOOL_A_RINGS_HEADER] = |
| NLA_POLICY_NESTED(ethnl_header_policy), |
| [ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 }, |
| [ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 }, |
| [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 }, |
| [ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 }, |
| [ETHTOOL_A_RINGS_RX_BUF_LEN] = NLA_POLICY_MIN(NLA_U32, 1), |
| [ETHTOOL_A_RINGS_TCP_DATA_SPLIT] = |
| NLA_POLICY_MAX(NLA_U8, ETHTOOL_TCP_DATA_SPLIT_ENABLED), |
| [ETHTOOL_A_RINGS_CQE_SIZE] = NLA_POLICY_MIN(NLA_U32, 1), |
| [ETHTOOL_A_RINGS_TX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1), |
| [ETHTOOL_A_RINGS_RX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1), |
| [ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN] = { .type = NLA_U32 }, |
| }; |
| |
| static int |
| ethnl_set_rings_validate(struct ethnl_req_info *req_info, |
| struct genl_info *info) |
| { |
| const struct ethtool_ops *ops = req_info->dev->ethtool_ops; |
| struct nlattr **tb = info->attrs; |
| |
| if (tb[ETHTOOL_A_RINGS_RX_BUF_LEN] && |
| !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) { |
| NL_SET_ERR_MSG_ATTR(info->extack, |
| tb[ETHTOOL_A_RINGS_RX_BUF_LEN], |
| "setting rx buf len not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT] && |
| !(ops->supported_ring_params & ETHTOOL_RING_USE_TCP_DATA_SPLIT)) { |
| NL_SET_ERR_MSG_ATTR(info->extack, |
| tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT], |
| "setting TCP data split is not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (tb[ETHTOOL_A_RINGS_CQE_SIZE] && |
| !(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) { |
| NL_SET_ERR_MSG_ATTR(info->extack, |
| tb[ETHTOOL_A_RINGS_CQE_SIZE], |
| "setting cqe size not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (tb[ETHTOOL_A_RINGS_TX_PUSH] && |
| !(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH)) { |
| NL_SET_ERR_MSG_ATTR(info->extack, |
| tb[ETHTOOL_A_RINGS_TX_PUSH], |
| "setting tx push not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (tb[ETHTOOL_A_RINGS_RX_PUSH] && |
| !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_PUSH)) { |
| NL_SET_ERR_MSG_ATTR(info->extack, |
| tb[ETHTOOL_A_RINGS_RX_PUSH], |
| "setting rx push not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN] && |
| !(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH_BUF_LEN)) { |
| NL_SET_ERR_MSG_ATTR(info->extack, |
| tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN], |
| "setting tx push buf len is not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| return ops->get_ringparam && ops->set_ringparam ? 1 : -EOPNOTSUPP; |
| } |
| |
| static int |
| ethnl_set_rings(struct ethnl_req_info *req_info, struct genl_info *info) |
| { |
| struct kernel_ethtool_ringparam kernel_ringparam = {}; |
| struct ethtool_ringparam ringparam = {}; |
| struct net_device *dev = req_info->dev; |
| struct nlattr **tb = info->attrs; |
| const struct nlattr *err_attr; |
| bool mod = false; |
| int ret; |
| |
| dev->ethtool_ops->get_ringparam(dev, &ringparam, |
| &kernel_ringparam, info->extack); |
| |
| ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod); |
| ethnl_update_u32(&ringparam.rx_mini_pending, |
| tb[ETHTOOL_A_RINGS_RX_MINI], &mod); |
| ethnl_update_u32(&ringparam.rx_jumbo_pending, |
| tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod); |
| ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod); |
| ethnl_update_u32(&kernel_ringparam.rx_buf_len, |
| tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod); |
| ethnl_update_u8(&kernel_ringparam.tcp_data_split, |
| tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT], &mod); |
| ethnl_update_u32(&kernel_ringparam.cqe_size, |
| tb[ETHTOOL_A_RINGS_CQE_SIZE], &mod); |
| ethnl_update_u8(&kernel_ringparam.tx_push, |
| tb[ETHTOOL_A_RINGS_TX_PUSH], &mod); |
| ethnl_update_u8(&kernel_ringparam.rx_push, |
| tb[ETHTOOL_A_RINGS_RX_PUSH], &mod); |
| ethnl_update_u32(&kernel_ringparam.tx_push_buf_len, |
| tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN], &mod); |
| if (!mod) |
| return 0; |
| |
| /* ensure new ring parameters are within limits */ |
| if (ringparam.rx_pending > ringparam.rx_max_pending) |
| err_attr = tb[ETHTOOL_A_RINGS_RX]; |
| else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending) |
| err_attr = tb[ETHTOOL_A_RINGS_RX_MINI]; |
| else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending) |
| err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO]; |
| else if (ringparam.tx_pending > ringparam.tx_max_pending) |
| err_attr = tb[ETHTOOL_A_RINGS_TX]; |
| else |
| err_attr = NULL; |
| if (err_attr) { |
| NL_SET_ERR_MSG_ATTR(info->extack, err_attr, |
| "requested ring size exceeds maximum"); |
| return -EINVAL; |
| } |
| |
| if (kernel_ringparam.tx_push_buf_len > kernel_ringparam.tx_push_buf_max_len) { |
| NL_SET_ERR_MSG_ATTR_FMT(info->extack, tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN], |
| "Requested TX push buffer exceeds the maximum of %u", |
| kernel_ringparam.tx_push_buf_max_len); |
| |
| return -EINVAL; |
| } |
| |
| ret = dev->ethtool_ops->set_ringparam(dev, &ringparam, |
| &kernel_ringparam, info->extack); |
| return ret < 0 ? ret : 1; |
| } |
| |
| const struct ethnl_request_ops ethnl_rings_request_ops = { |
| .request_cmd = ETHTOOL_MSG_RINGS_GET, |
| .reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY, |
| .hdr_attr = ETHTOOL_A_RINGS_HEADER, |
| .req_info_size = sizeof(struct rings_req_info), |
| .reply_data_size = sizeof(struct rings_reply_data), |
| |
| .prepare_data = rings_prepare_data, |
| .reply_size = rings_reply_size, |
| .fill_reply = rings_fill_reply, |
| |
| .set_validate = ethnl_set_rings_validate, |
| .set = ethnl_set_rings, |
| .set_ntf_cmd = ETHTOOL_MSG_RINGS_NTF, |
| }; |
