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authorJie Wang <wangjie125@huawei.com>2022-04-12 10:01:19 +0800
committerJakub Kicinski <kuba@kernel.org>2022-04-15 11:41:35 -0700
commit4dc84c06a343fcb95fd5a0acb537aefa4ebdd1b0 (patch)
tree1d4d2df174abd6f963ed1fb7a082e56e5725aded /net/ethtool
parent0a03f3c511f57da4d7159a150f1ab4b87f62c040 (diff)
downloadlinux-4dc84c06a343fcb95fd5a0acb537aefa4ebdd1b0.tar.bz2
net: ethtool: extend ringparam set/get APIs for tx_push
Currently tx push is a standard driver feature which controls use of a fast path descriptor push. So this patch extends the ringparam APIs and data structures to support set/get tx push by ethtool -G/g. Signed-off-by: Jie Wang <wangjie125@huawei.com> Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ethtool')
-rw-r--r--net/ethtool/netlink.h2
-rw-r--r--net/ethtool/rings.c18
2 files changed, 17 insertions, 3 deletions
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 29d01662a48b..7919ddb2371c 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -363,7 +363,7 @@ extern const struct nla_policy ethnl_features_set_policy[ETHTOOL_A_FEATURES_WANT
extern const struct nla_policy ethnl_privflags_get_policy[ETHTOOL_A_PRIVFLAGS_HEADER + 1];
extern const struct nla_policy ethnl_privflags_set_policy[ETHTOOL_A_PRIVFLAGS_FLAGS + 1];
extern const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_HEADER + 1];
-extern const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_CQE_SIZE + 1];
+extern const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_TX_PUSH + 1];
extern const struct nla_policy ethnl_channels_get_policy[ETHTOOL_A_CHANNELS_HEADER + 1];
extern const struct nla_policy ethnl_channels_set_policy[ETHTOOL_A_CHANNELS_COMBINED_COUNT + 1];
extern const struct nla_policy ethnl_coalesce_get_policy[ETHTOOL_A_COALESCE_HEADER + 1];
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index 9f33c9689b56..9ed60c507d97 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -55,7 +55,8 @@ static int rings_reply_size(const struct ethnl_req_info *req_base,
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(u32) + /* _RINGS_CQE_SIZE */
+ nla_total_size(sizeof(u8))); /* _RINGS_TX_PUSH */
}
static int rings_fill_reply(struct sk_buff *skb,
@@ -94,7 +95,8 @@ static int rings_fill_reply(struct sk_buff *skb,
(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_u32(skb, ETHTOOL_A_RINGS_CQE_SIZE, kr->cqe_size))) ||
+ nla_put_u8(skb, ETHTOOL_A_RINGS_TX_PUSH, !!kr->tx_push))
return -EMSGSIZE;
return 0;
@@ -123,6 +125,7 @@ const struct nla_policy ethnl_rings_set_policy[] = {
[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),
};
int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
@@ -149,6 +152,15 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
if (!ops->get_ringparam || !ops->set_ringparam)
goto out_dev;
+ if (tb[ETHTOOL_A_RINGS_TX_PUSH] &&
+ !(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH)) {
+ ret = -EOPNOTSUPP;
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ tb[ETHTOOL_A_RINGS_TX_PUSH],
+ "setting tx push not supported");
+ goto out_dev;
+ }
+
rtnl_lock();
ret = ethnl_ops_begin(dev);
if (ret < 0)
@@ -165,6 +177,8 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
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);
ret = 0;
if (!mod)
goto out_ops;