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-rw-r--r--net/ethtool/rings.c260
1 files changed, 260 insertions, 0 deletions
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
new file mode 100644
index 0000000000..fb09f774ea
--- /dev/null
+++ b/net/ethtool/rings.c
@@ -0,0 +1,260 @@
+// 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_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_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_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,
+};