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-rw-r--r--net/ethtool/coalesce.c341
1 files changed, 341 insertions, 0 deletions
diff --git a/net/ethtool/coalesce.c b/net/ethtool/coalesce.c
new file mode 100644
index 000000000000..487bdf345541
--- /dev/null
+++ b/net/ethtool/coalesce.c
@@ -0,0 +1,341 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "netlink.h"
+#include "common.h"
+
+struct coalesce_req_info {
+ struct ethnl_req_info base;
+};
+
+struct coalesce_reply_data {
+ struct ethnl_reply_data base;
+ struct ethtool_coalesce coalesce;
+ struct kernel_ethtool_coalesce kernel_coalesce;
+ u32 supported_params;
+};
+
+#define COALESCE_REPDATA(__reply_base) \
+ container_of(__reply_base, struct coalesce_reply_data, base)
+
+#define __SUPPORTED_OFFSET ETHTOOL_A_COALESCE_RX_USECS
+static u32 attr_to_mask(unsigned int attr_type)
+{
+ return BIT(attr_type - __SUPPORTED_OFFSET);
+}
+
+/* build time check that indices in ethtool_ops::supported_coalesce_params
+ * match corresponding attribute types with an offset
+ */
+#define __CHECK_SUPPORTED_OFFSET(x) \
+ static_assert((ETHTOOL_ ## x) == \
+ BIT((ETHTOOL_A_ ## x) - __SUPPORTED_OFFSET))
+__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS);
+__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES);
+__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_IRQ);
+__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_IRQ);
+__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS);
+__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES);
+__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_IRQ);
+__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_IRQ);
+__CHECK_SUPPORTED_OFFSET(COALESCE_STATS_BLOCK_USECS);
+__CHECK_SUPPORTED_OFFSET(COALESCE_USE_ADAPTIVE_RX);
+__CHECK_SUPPORTED_OFFSET(COALESCE_USE_ADAPTIVE_TX);
+__CHECK_SUPPORTED_OFFSET(COALESCE_PKT_RATE_LOW);
+__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_LOW);
+__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_LOW);
+__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_LOW);
+__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_LOW);
+__CHECK_SUPPORTED_OFFSET(COALESCE_PKT_RATE_HIGH);
+__CHECK_SUPPORTED_OFFSET(COALESCE_RX_USECS_HIGH);
+__CHECK_SUPPORTED_OFFSET(COALESCE_RX_MAX_FRAMES_HIGH);
+__CHECK_SUPPORTED_OFFSET(COALESCE_TX_USECS_HIGH);
+__CHECK_SUPPORTED_OFFSET(COALESCE_TX_MAX_FRAMES_HIGH);
+__CHECK_SUPPORTED_OFFSET(COALESCE_RATE_SAMPLE_INTERVAL);
+
+const struct nla_policy ethnl_coalesce_get_policy[] = {
+ [ETHTOOL_A_COALESCE_HEADER] =
+ NLA_POLICY_NESTED(ethnl_header_policy),
+};
+
+static int coalesce_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct coalesce_reply_data *data = COALESCE_REPDATA(reply_base);
+ struct netlink_ext_ack *extack = info ? info->extack : NULL;
+ struct net_device *dev = reply_base->dev;
+ int ret;
+
+ if (!dev->ethtool_ops->get_coalesce)
+ return -EOPNOTSUPP;
+ data->supported_params = dev->ethtool_ops->supported_coalesce_params;
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ return ret;
+ ret = dev->ethtool_ops->get_coalesce(dev, &data->coalesce,
+ &data->kernel_coalesce, extack);
+ ethnl_ops_complete(dev);
+
+ return ret;
+}
+
+static int coalesce_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ return nla_total_size(sizeof(u32)) + /* _RX_USECS */
+ nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES */
+ nla_total_size(sizeof(u32)) + /* _RX_USECS_IRQ */
+ nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_IRQ */
+ nla_total_size(sizeof(u32)) + /* _TX_USECS */
+ nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES */
+ nla_total_size(sizeof(u32)) + /* _TX_USECS_IRQ */
+ nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_IRQ */
+ nla_total_size(sizeof(u32)) + /* _STATS_BLOCK_USECS */
+ nla_total_size(sizeof(u8)) + /* _USE_ADAPTIVE_RX */
+ nla_total_size(sizeof(u8)) + /* _USE_ADAPTIVE_TX */
+ nla_total_size(sizeof(u32)) + /* _PKT_RATE_LOW */
+ nla_total_size(sizeof(u32)) + /* _RX_USECS_LOW */
+ nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_LOW */
+ nla_total_size(sizeof(u32)) + /* _TX_USECS_LOW */
+ nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_LOW */
+ nla_total_size(sizeof(u32)) + /* _PKT_RATE_HIGH */
+ nla_total_size(sizeof(u32)) + /* _RX_USECS_HIGH */
+ nla_total_size(sizeof(u32)) + /* _RX_MAX_FRAMES_HIGH */
+ nla_total_size(sizeof(u32)) + /* _TX_USECS_HIGH */
+ nla_total_size(sizeof(u32)) + /* _TX_MAX_FRAMES_HIGH */
+ nla_total_size(sizeof(u32)) + /* _RATE_SAMPLE_INTERVAL */
+ nla_total_size(sizeof(u8)) + /* _USE_CQE_MODE_TX */
+ nla_total_size(sizeof(u8)); /* _USE_CQE_MODE_RX */
+}
+
+static bool coalesce_put_u32(struct sk_buff *skb, u16 attr_type, u32 val,
+ u32 supported_params)
+{
+ if (!val && !(supported_params & attr_to_mask(attr_type)))
+ return false;
+ return nla_put_u32(skb, attr_type, val);
+}
+
+static bool coalesce_put_bool(struct sk_buff *skb, u16 attr_type, u32 val,
+ u32 supported_params)
+{
+ if (!val && !(supported_params & attr_to_mask(attr_type)))
+ return false;
+ return nla_put_u8(skb, attr_type, !!val);
+}
+
+static int coalesce_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct coalesce_reply_data *data = COALESCE_REPDATA(reply_base);
+ const struct kernel_ethtool_coalesce *kcoal = &data->kernel_coalesce;
+ const struct ethtool_coalesce *coal = &data->coalesce;
+ u32 supported = data->supported_params;
+
+ if (coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS,
+ coal->rx_coalesce_usecs, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES,
+ coal->rx_max_coalesced_frames, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_IRQ,
+ coal->rx_coalesce_usecs_irq, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ,
+ coal->rx_max_coalesced_frames_irq, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS,
+ coal->tx_coalesce_usecs, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES,
+ coal->tx_max_coalesced_frames, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_IRQ,
+ coal->tx_coalesce_usecs_irq, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ,
+ coal->tx_max_coalesced_frames_irq, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_STATS_BLOCK_USECS,
+ coal->stats_block_coalesce_usecs, supported) ||
+ coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX,
+ coal->use_adaptive_rx_coalesce, supported) ||
+ coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX,
+ coal->use_adaptive_tx_coalesce, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_PKT_RATE_LOW,
+ coal->pkt_rate_low, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_LOW,
+ coal->rx_coalesce_usecs_low, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW,
+ coal->rx_max_coalesced_frames_low, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_LOW,
+ coal->tx_coalesce_usecs_low, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW,
+ coal->tx_max_coalesced_frames_low, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_PKT_RATE_HIGH,
+ coal->pkt_rate_high, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_USECS_HIGH,
+ coal->rx_coalesce_usecs_high, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH,
+ coal->rx_max_coalesced_frames_high, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_USECS_HIGH,
+ coal->tx_coalesce_usecs_high, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH,
+ coal->tx_max_coalesced_frames_high, supported) ||
+ coalesce_put_u32(skb, ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL,
+ coal->rate_sample_interval, supported) ||
+ coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_CQE_MODE_TX,
+ kcoal->use_cqe_mode_tx, supported) ||
+ coalesce_put_bool(skb, ETHTOOL_A_COALESCE_USE_CQE_MODE_RX,
+ kcoal->use_cqe_mode_rx, supported))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+const struct ethnl_request_ops ethnl_coalesce_request_ops = {
+ .request_cmd = ETHTOOL_MSG_COALESCE_GET,
+ .reply_cmd = ETHTOOL_MSG_COALESCE_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_COALESCE_HEADER,
+ .req_info_size = sizeof(struct coalesce_req_info),
+ .reply_data_size = sizeof(struct coalesce_reply_data),
+
+ .prepare_data = coalesce_prepare_data,
+ .reply_size = coalesce_reply_size,
+ .fill_reply = coalesce_fill_reply,
+};
+
+/* COALESCE_SET */
+
+const struct nla_policy ethnl_coalesce_set_policy[] = {
+ [ETHTOOL_A_COALESCE_HEADER] =
+ NLA_POLICY_NESTED(ethnl_header_policy),
+ [ETHTOOL_A_COALESCE_RX_USECS] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_RX_MAX_FRAMES] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_RX_USECS_IRQ] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_TX_USECS] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_TX_MAX_FRAMES] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_TX_USECS_IRQ] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_STATS_BLOCK_USECS] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX] = { .type = NLA_U8 },
+ [ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX] = { .type = NLA_U8 },
+ [ETHTOOL_A_COALESCE_PKT_RATE_LOW] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_RX_USECS_LOW] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_TX_USECS_LOW] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_PKT_RATE_HIGH] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_RX_USECS_HIGH] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_TX_USECS_HIGH] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL] = { .type = NLA_U32 },
+ [ETHTOOL_A_COALESCE_USE_CQE_MODE_TX] = NLA_POLICY_MAX(NLA_U8, 1),
+ [ETHTOOL_A_COALESCE_USE_CQE_MODE_RX] = NLA_POLICY_MAX(NLA_U8, 1),
+};
+
+int ethnl_set_coalesce(struct sk_buff *skb, struct genl_info *info)
+{
+ struct kernel_ethtool_coalesce kernel_coalesce = {};
+ struct ethtool_coalesce coalesce = {};
+ struct ethnl_req_info req_info = {};
+ struct nlattr **tb = info->attrs;
+ const struct ethtool_ops *ops;
+ struct net_device *dev;
+ u32 supported_params;
+ bool mod = false;
+ int ret;
+ u16 a;
+
+ ret = ethnl_parse_header_dev_get(&req_info,
+ tb[ETHTOOL_A_COALESCE_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_coalesce || !ops->set_coalesce)
+ goto out_dev;
+
+ /* make sure that only supported parameters are present */
+ supported_params = ops->supported_coalesce_params;
+ for (a = ETHTOOL_A_COALESCE_RX_USECS; a < __ETHTOOL_A_COALESCE_CNT; a++)
+ if (tb[a] && !(supported_params & attr_to_mask(a))) {
+ ret = -EINVAL;
+ NL_SET_ERR_MSG_ATTR(info->extack, tb[a],
+ "cannot modify an unsupported parameter");
+ goto out_dev;
+ }
+
+ rtnl_lock();
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ goto out_rtnl;
+ ret = ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
+ info->extack);
+ if (ret < 0)
+ goto out_ops;
+
+ ethnl_update_u32(&coalesce.rx_coalesce_usecs,
+ tb[ETHTOOL_A_COALESCE_RX_USECS], &mod);
+ ethnl_update_u32(&coalesce.rx_max_coalesced_frames,
+ tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES], &mod);
+ ethnl_update_u32(&coalesce.rx_coalesce_usecs_irq,
+ tb[ETHTOOL_A_COALESCE_RX_USECS_IRQ], &mod);
+ ethnl_update_u32(&coalesce.rx_max_coalesced_frames_irq,
+ tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ], &mod);
+ ethnl_update_u32(&coalesce.tx_coalesce_usecs,
+ tb[ETHTOOL_A_COALESCE_TX_USECS], &mod);
+ ethnl_update_u32(&coalesce.tx_max_coalesced_frames,
+ tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES], &mod);
+ ethnl_update_u32(&coalesce.tx_coalesce_usecs_irq,
+ tb[ETHTOOL_A_COALESCE_TX_USECS_IRQ], &mod);
+ ethnl_update_u32(&coalesce.tx_max_coalesced_frames_irq,
+ tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ], &mod);
+ ethnl_update_u32(&coalesce.stats_block_coalesce_usecs,
+ tb[ETHTOOL_A_COALESCE_STATS_BLOCK_USECS], &mod);
+ ethnl_update_bool32(&coalesce.use_adaptive_rx_coalesce,
+ tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX], &mod);
+ ethnl_update_bool32(&coalesce.use_adaptive_tx_coalesce,
+ tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX], &mod);
+ ethnl_update_u32(&coalesce.pkt_rate_low,
+ tb[ETHTOOL_A_COALESCE_PKT_RATE_LOW], &mod);
+ ethnl_update_u32(&coalesce.rx_coalesce_usecs_low,
+ tb[ETHTOOL_A_COALESCE_RX_USECS_LOW], &mod);
+ ethnl_update_u32(&coalesce.rx_max_coalesced_frames_low,
+ tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW], &mod);
+ ethnl_update_u32(&coalesce.tx_coalesce_usecs_low,
+ tb[ETHTOOL_A_COALESCE_TX_USECS_LOW], &mod);
+ ethnl_update_u32(&coalesce.tx_max_coalesced_frames_low,
+ tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW], &mod);
+ ethnl_update_u32(&coalesce.pkt_rate_high,
+ tb[ETHTOOL_A_COALESCE_PKT_RATE_HIGH], &mod);
+ ethnl_update_u32(&coalesce.rx_coalesce_usecs_high,
+ tb[ETHTOOL_A_COALESCE_RX_USECS_HIGH], &mod);
+ ethnl_update_u32(&coalesce.rx_max_coalesced_frames_high,
+ tb[ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH], &mod);
+ ethnl_update_u32(&coalesce.tx_coalesce_usecs_high,
+ tb[ETHTOOL_A_COALESCE_TX_USECS_HIGH], &mod);
+ ethnl_update_u32(&coalesce.tx_max_coalesced_frames_high,
+ tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH], &mod);
+ ethnl_update_u32(&coalesce.rate_sample_interval,
+ tb[ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL], &mod);
+ ethnl_update_u8(&kernel_coalesce.use_cqe_mode_tx,
+ tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_TX], &mod);
+ ethnl_update_u8(&kernel_coalesce.use_cqe_mode_rx,
+ tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_RX], &mod);
+ ret = 0;
+ if (!mod)
+ goto out_ops;
+
+ ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
+ info->extack);
+ if (ret < 0)
+ goto out_ops;
+ ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
+
+out_ops:
+ ethnl_ops_complete(dev);
+out_rtnl:
+ rtnl_unlock();
+out_dev:
+ ethnl_parse_header_dev_put(&req_info);
+ return ret;
+}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.