From: Taehee Yoo <ap420073@gmail•com>
To: davem@davemloft•net, kuba@kernel•org, pabeni@redhat•com,
edumazet@google•com, almasrymina@google•com,
donald.hunter@gmail•com, corbet@lwn•net,
michael.chan@broadcom•com, andrew+netdev@lunn•ch,
hawk@kernel•org, ilias.apalodimas@linaro•org, ast@kernel•org,
daniel@iogearbox•net, john.fastabend@gmail•com, dw@davidwei•uk,
sdf@fomichev•me, asml.silence@gmail•com, brett.creeley@amd•com,
linux-doc@vger•kernel.org, netdev@vger•kernel.org
Cc: kory.maincent@bootlin•com, maxime.chevallier@bootlin•com,
danieller@nvidia•com, hengqi@linux•alibaba.com,
ecree.xilinx@gmail•com, przemyslaw.kitszel@intel•com,
hkallweit1@gmail•com, ahmed.zaki@intel•com,
rrameshbabu@nvidia•com, idosch@nvidia•com, jiri@resnulli•us,
bigeasy@linutronix•de, lorenzo@kernel•org, jdamato@fastly•com,
aleksander.lobakin@intel•com, kaiyuanz@google•com,
willemb@google•com, daniel.zahka@gmail•com, ap420073@gmail•com
Subject: [PATCH net-next v6 2/9] net: ethtool: add hds_config member in ethtool_netdev_state
Date: Wed, 18 Dec 2024 14:45:23 +0000 [thread overview]
Message-ID: <20241218144530.2963326-3-ap420073@gmail.com> (raw)
In-Reply-To: <20241218144530.2963326-1-ap420073@gmail.com>
When tcp-data-split is UNKNOWN mode, drivers arbitrarily handle it.
For example, bnxt_en driver automatically enables if at least one of
LRO/GRO/JUMBO is enabled.
If tcp-data-split is UNKNOWN and LRO is enabled, a driver returns
ENABLES of tcp-data-split, not UNKNOWN.
So, `ethtool -g eth0` shows tcp-data-split is enabled.
The problem is in the setting situation.
In the ethnl_set_rings(), it first calls get_ringparam() to get the
current driver's config.
At that moment, if driver's tcp-data-split config is UNKNOWN, it returns
ENABLE if LRO/GRO/JUMBO is enabled.
Then, it sets values from the user and driver's current config to
kernel_ethtool_ringparam.
Last it calls .set_ringparam().
The driver, especially bnxt_en driver receives
ETHTOOL_TCP_DATA_SPLIT_ENABLED.
But it can't distinguish whether it is set by the user or just the
current config.
When user updates ring parameter, the new hds_config value is updated
and current hds_config value is stored to old_hdsconfig.
Driver's .set_ringparam() callback can distinguish a passed
tcp-data-split value is came from user explicitly.
If .set_ringparam() is failed, hds_config is rollbacked immediately.
Suggested-by: Jakub Kicinski <kuba@kernel•org>
Signed-off-by: Taehee Yoo <ap420073@gmail•com>
---
v6:
- use hds_config instead of using tcp_data_split_mod.
v5:
- Patch added.
include/linux/ethtool.h | 2 ++
net/ethtool/rings.c | 4 ++++
2 files changed, 6 insertions(+)
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index f711bfd75c4d..4e451084d58a 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -1134,12 +1134,14 @@ int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
* @rss_ctx: XArray of custom RSS contexts
* @rss_lock: Protects entries in @rss_ctx. May be taken from
* within RTNL.
+ * @hds_config: HDS value from userspace.
* @wol_enabled: Wake-on-LAN is enabled
* @module_fw_flash_in_progress: Module firmware flashing is in progress.
*/
struct ethtool_netdev_state {
struct xarray rss_ctx;
struct mutex rss_lock;
+ u8 hds_config;
unsigned wol_enabled:1;
unsigned module_fw_flash_in_progress:1;
};
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index b7865a14fdf8..2e8239a76234 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -203,6 +203,7 @@ ethnl_set_rings(struct ethnl_req_info *req_info, struct genl_info *info)
dev->ethtool_ops->get_ringparam(dev, &ringparam,
&kernel_ringparam, info->extack);
+ kernel_ringparam.tcp_data_split = dev->ethtool->hds_config;
ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod);
ethnl_update_u32(&ringparam.rx_mini_pending,
@@ -252,6 +253,9 @@ ethnl_set_rings(struct ethnl_req_info *req_info, struct genl_info *info)
ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
&kernel_ringparam, info->extack);
+ if (!ret)
+ dev->ethtool->hds_config = kernel_ringparam.tcp_data_split;
+
return ret < 0 ? ret : 1;
}
--
2.34.1
next prev parent reply other threads:[~2024-12-18 14:47 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-18 14:45 [PATCH net-next v6 0/9] bnxt_en: implement tcp-data-split and thresh option Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 1/9] bnxt_en: add support for rx-copybreak ethtool command Taehee Yoo
2024-12-19 2:07 ` Jakub Kicinski
2024-12-19 13:24 ` Taehee Yoo
2024-12-18 14:45 ` Taehee Yoo [this message]
2024-12-19 2:16 ` [PATCH net-next v6 2/9] net: ethtool: add hds_config member in ethtool_netdev_state Jakub Kicinski
2024-12-18 14:45 ` [PATCH net-next v6 3/9] bnxt_en: add support for tcp-data-split ethtool command Taehee Yoo
2024-12-19 2:25 ` Jakub Kicinski
2024-12-19 2:41 ` Jakub Kicinski
2024-12-19 14:05 ` Taehee Yoo
2024-12-19 14:29 ` Jakub Kicinski
2024-12-19 15:14 ` Taehee Yoo
2024-12-19 15:25 ` Jakub Kicinski
2024-12-19 19:33 ` Andy Gospodarek
2024-12-19 20:18 ` Jakub Kicinski
2024-12-19 23:41 ` Michael Chan
2024-12-20 2:08 ` Jakub Kicinski
2024-12-18 14:45 ` [PATCH net-next v6 4/9] net: ethtool: add support for configuring hds-thresh Taehee Yoo
2024-12-19 2:35 ` Jakub Kicinski
2024-12-19 14:10 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 5/9] bnxt_en: add support for hds-thresh ethtool command Taehee Yoo
2024-12-19 2:40 ` Jakub Kicinski
2024-12-19 14:12 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 6/9] net: devmem: add ring parameter filtering Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 7/9] net: ethtool: " Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 8/9] net: disallow setup single buffer XDP when tcp-data-split is enabled Taehee Yoo
2024-12-19 2:44 ` Jakub Kicinski
2024-12-19 14:14 ` Taehee Yoo
2024-12-18 14:45 ` [PATCH net-next v6 9/9] netdevsim: add HDS feature Taehee Yoo
2024-12-19 2:49 ` Jakub Kicinski
2024-12-19 14:37 ` Taehee Yoo
2024-12-19 14:45 ` Jakub Kicinski
2024-12-19 15:19 ` Taehee Yoo
2024-12-19 15:28 ` Jakub Kicinski
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