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Date: Fri, 24 Sep 2021 22:29:56 +0800
From: Guangbin Huang <huangguangbin2@...wei.com>
To: <davem@...emloft.net>, <kuba@...nel.org>, <mkubecek@...e.cz>,
<andrew@...n.ch>, <amitc@...lanox.com>, <idosch@...sch.org>,
<danieller@...dia.com>, <jesse.brandeburg@...el.com>,
<anthony.l.nguyen@...el.com>, <jdike@...toit.com>,
<richard@....at>, <anton.ivanov@...bridgegreys.com>,
<netanel@...zon.com>, <akiyano@...zon.com>, <gtzalik@...zon.com>,
<saeedb@...zon.com>, <chris.snook@...il.com>,
<ulli.kroll@...glemail.com>, <linus.walleij@...aro.org>,
<jeroendb@...gle.com>, <csully@...gle.com>,
<awogbemila@...gle.com>, <jdmason@...zu.us>,
<rain.1986.08.12@...il.com>, <zyjzyj2000@...il.com>,
<kys@...rosoft.com>, <haiyangz@...rosoft.com>, <mst@...hat.com>,
<jasowang@...hat.com>, <doshir@...are.com>,
<pv-drivers@...are.com>, <jwi@...ux.ibm.com>,
<kgraul@...ux.ibm.com>, <hca@...ux.ibm.com>, <gor@...ux.ibm.com>,
<johannes@...solutions.net>
CC: <netdev@...r.kernel.org>, <lipeng321@...wei.com>,
<chenhao288@...ilicon.com>, <huangguangbin2@...wei.com>,
<linux-s390@...r.kernel.org>
Subject: [PATCH V2 net-next 3/6] ethtool: add support to set/get rx buf len via ethtool
From: Hao Chen <chenhao288@...ilicon.com>
Add support to set rx buf len via ethtool -G parameter and get
rx buf len via ethtool -g parameter.
Signed-off-by: Hao Chen <chenhao288@...ilicon.com>
Signed-off-by: Guangbin Huang <huangguangbin2@...wei.com>
---
Documentation/networking/ethtool-netlink.rst | 2 ++
include/linux/ethtool.h | 18 ++++++++++++++++--
include/uapi/linux/ethtool.h | 8 ++++++++
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/netlink.h | 2 +-
net/ethtool/rings.c | 17 ++++++++++++++++-
6 files changed, 44 insertions(+), 4 deletions(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index a47b0255aaf9..9734b7c1e05d 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -841,6 +841,7 @@ Kernel response contents:
``ETHTOOL_A_RINGS_RX_MINI`` u32 size of RX mini ring
``ETHTOOL_A_RINGS_RX_JUMBO`` u32 size of RX jumbo ring
``ETHTOOL_A_RINGS_TX`` u32 size of TX ring
+ ``ETHTOOL_A_RINGS_RX_BUF_LEN`` u32 size of buffers on the ring
==================================== ====== ==========================
@@ -857,6 +858,7 @@ Request contents:
``ETHTOOL_A_RINGS_RX_MINI`` u32 size of RX mini ring
``ETHTOOL_A_RINGS_RX_JUMBO`` u32 size of RX jumbo ring
``ETHTOOL_A_RINGS_TX`` u32 size of TX ring
+ ``ETHTOOL_A_RINGS_RX_BUF_LEN`` u32 size of buffers on the ring
==================================== ====== ==========================
Kernel checks that requested ring sizes do not exceed limits reported by
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 849524b55d89..61e42a0b60d3 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -67,6 +67,14 @@ enum {
ETH_RSS_HASH_FUNCS_COUNT
};
+/**
+ * enum ethtool_supported_ring_param - indicator caps for setting ring params
+ * @ETHTOOL_RING_USE_RX_BUF_LEN: capture for setting rx_buf_len
+ */
+enum ethtool_supported_ring_param {
+ ETHTOOL_RING_USE_RX_BUF_LEN = BIT(0),
+};
+
#define __ETH_RSS_HASH_BIT(bit) ((u32)1 << (bit))
#define __ETH_RSS_HASH(name) __ETH_RSS_HASH_BIT(ETH_RSS_HASH_##name##_BIT)
@@ -420,6 +428,7 @@ struct ethtool_module_eeprom {
* @cap_link_lanes_supported: indicates if the driver supports lanes
* parameter.
* @supported_coalesce_params: supported types of interrupt coalescing.
+ * @supported_ring_params: supported ring params.
* @get_drvinfo: Report driver/device information. Should only set the
* @driver, @version, @fw_version and @bus_info fields. If not
* implemented, the @driver and @bus_info fields will be filled in
@@ -596,6 +605,7 @@ struct ethtool_module_eeprom {
struct ethtool_ops {
u32 cap_link_lanes_supported:1;
u32 supported_coalesce_params;
+ u32 supported_ring_params;
void (*get_drvinfo)(struct net_device *, struct ethtool_drvinfo *);
int (*get_regs_len)(struct net_device *);
void (*get_regs)(struct net_device *, struct ethtool_regs *, void *);
@@ -621,9 +631,13 @@ struct ethtool_ops {
struct kernel_ethtool_coalesce *,
struct netlink_ext_ack *);
void (*get_ringparam)(struct net_device *,
- struct ethtool_ringparam *);
+ struct ethtool_ringparam *,
+ struct ethtool_ringparam_ext *,
+ struct netlink_ext_ack *);
int (*set_ringparam)(struct net_device *,
- struct ethtool_ringparam *);
+ struct ethtool_ringparam *,
+ struct ethtool_ringparam_ext *,
+ struct netlink_ext_ack *);
void (*get_pause_stats)(struct net_device *dev,
struct ethtool_pause_stats *pause_stats);
void (*get_pauseparam)(struct net_device *,
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 266e95e4fb33..83544186cbb5 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -535,6 +535,14 @@ struct ethtool_ringparam {
__u32 tx_pending;
};
+/**
+ * struct ethtool_ringparam_ext - RX/TX ring configuration
+ * @rx_buf_len: Current length of buffers on the rx ring.
+ */
+struct ethtool_ringparam_ext {
+ __u32 rx_buf_len;
+};
+
/**
* struct ethtool_channels - configuring number of network channel
* @cmd: ETHTOOL_{G,S}CHANNELS
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 5545f1ca9237..3883fa4168e9 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -325,6 +325,7 @@ enum {
ETHTOOL_A_RINGS_RX_MINI, /* u32 */
ETHTOOL_A_RINGS_RX_JUMBO, /* u32 */
ETHTOOL_A_RINGS_TX, /* u32 */
+ ETHTOOL_A_RINGS_RX_BUF_LEN, /* u32 */
/* add new constants above here */
__ETHTOOL_A_RINGS_CNT,
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index e8987e28036f..3183f1fc6990 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -355,7 +355,7 @@ 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_TX + 1];
+extern const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_RX_BUF_LEN + 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 4e097812a967..dd645d1334be 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -10,6 +10,7 @@ struct rings_req_info {
struct rings_reply_data {
struct ethnl_reply_data base;
struct ethtool_ringparam ringparam;
+ struct ethtool_ringparam_ext ringparam_ext;
};
#define RINGS_REPDATA(__reply_base) \
@@ -49,7 +50,8 @@ static int rings_reply_size(const struct ethnl_req_info *req_base,
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_TX */
+ nla_total_size(sizeof(u32)); /* _RINGS_RX_BUF_LEN */
}
static int rings_fill_reply(struct sk_buff *skb,
@@ -105,10 +107,12 @@ const struct nla_policy ethnl_rings_set_policy[] = {
[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),
};
int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
{
+ struct ethtool_ringparam_ext ringparam_ext = {};
struct ethtool_ringparam ringparam = {};
struct ethnl_req_info req_info = {};
struct nlattr **tb = info->attrs;
@@ -142,6 +146,8 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
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(&ringparam_ext.rx_buf_len,
+ tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod);
ret = 0;
if (!mod)
goto out_ops;
@@ -164,6 +170,15 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
goto out_ops;
}
+ if (ringparam_ext.rx_buf_len != 0 &&
+ !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) {
+ ret = -EOPNOTSUPP;
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ tb[ETHTOOL_A_RINGS_RX_BUF_LEN],
+ "not supported setting rx buf len");
+ goto out_ops;
+ }
+
ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
if (ret < 0)
goto out_ops;
--
2.33.0
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