From patchwork Wed Oct 23 15:49:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kory Maincent X-Patchwork-Id: 13847369 X-Patchwork-Delegate: kuba@kernel.org Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1087D1CFEA5; Wed, 23 Oct 2024 15:49:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729698596; cv=none; b=VLu5ViYVdn5lHjyPn2asoPc68Ja2z5+pJZFxMEcCMs5+HGH+UHpYB+IIQMF/sITHd0nUMxo6XAPh6KX/sfojfsIolhnOQE7M1ssF5OnJnHl9loLr0UgG1aCArgZZOXdHTbPgy6kzu3DALI4ODfA0TtFVRlxEsyI58PimzjnVbIQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729698596; c=relaxed/simple; bh=RCKu2Qc1BCb8F32//MKqDRn+Jzcjb/keNDFf3WjBpIY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=YCS2LARvZ54Tbeb2YZZ+uhsDMlDmMl+syxQuL1y5kUtnNzPcRVrqfAPGsh8RymcgtCKREN5jL9jKCChnPxlEDEMMjdydxG33joZq6S7jD9LsQpRP9W1RebNsn8yAzA5sD17p/N2yEHRCzdbRPpGnmI/29VDAllbrvg2gVpp+kwU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=HRQZFhEB; arc=none smtp.client-ip=217.70.183.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="HRQZFhEB" Received: by mail.gandi.net (Postfix) with ESMTPSA id D7DA760005; Wed, 23 Oct 2024 15:49:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1729698591; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=FyZzxzCjnHJAMH0l+Ivv9r+WsB3QnaJdAU8B9q2VKBs=; b=HRQZFhEBSI7Alb8IizklG+qDEYrlZMcjG9EAKv40O1jH6BmjuiiAhZqeKwfb+rHwjK/Sv4 kAtvJUgZ/Ur1Q3VN/JJRlH29/esNLTlzq615prSGHncQjCcYDArpwjsBe73ylInJDDVohx Q0f51ouszlV3xfCCaW16f3yK8ZcooT+0m8cZISC8WMQ2r9gGX+pC/00GrAPDz7jsvsYM9G vq3mIQ0O6SymnmOiYQOHLgjaimNfwVLdErT9M6eRMuXUPZakBgytZsoZzAXMmvRh1SYlU3 XkdRQEZ4ZcGkrkCT+cEEvOcRIoOE3wr2rrsWaA7In68ge7YQPhdg7bBDSeFyRA== From: Kory Maincent Date: Wed, 23 Oct 2024 17:49:19 +0200 Subject: [PATCH net-next v18 09/10] net: ethtool: Add support for tsconfig command to get/set hwtstamp config Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241023-feature_ptp_netnext-v18-9-ed948f3b6887@bootlin.com> References: <20241023-feature_ptp_netnext-v18-0-ed948f3b6887@bootlin.com> In-Reply-To: <20241023-feature_ptp_netnext-v18-0-ed948f3b6887@bootlin.com> To: Florian Fainelli , Broadcom internal kernel review list , Andrew Lunn , Heiner Kallweit , Russell King , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Richard Cochran , Radu Pirea , Jay Vosburgh , Andy Gospodarek , Nicolas Ferre , Claudiu Beznea , Willem de Bruijn , Jonathan Corbet , Horatiu Vultur , UNGLinuxDriver@microchip.com, Simon Horman , Vladimir Oltean , donald.hunter@gmail.com, danieller@nvidia.com, ecree.xilinx@gmail.com, Andrew Lunn Cc: Thomas Petazzoni , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-doc@vger.kernel.org, Maxime Chevallier , Rahul Rameshbabu , Willem de Bruijn , Shannon Nelson , Alexandra Winter , Kory Maincent X-Mailer: b4 0.14.1 X-GND-Sasl: kory.maincent@bootlin.com X-Patchwork-Delegate: kuba@kernel.org Introduce support for ETHTOOL_MSG_TSCONFIG_GET/SET ethtool netlink socket to read and configure hwtstamp configuration of a PHC provider. Note that simultaneous hwtstamp isn't supported; configuring a new one disables the previous setting. Signed-off-by: Kory Maincent --- Jacob I removed your Reviewed-by as there is few changes on this patch. Changes in v16: - Add a new patch to separate tsinfo into a new tsconfig command to get and set the hwtstamp config. Changes in v17: - Fix a doc misalignment. Changes in v18: - Few changes in the set command - Add a set-reply ethtool socket - Add missing tsconfig netlink the documentation --- Documentation/networking/ethtool-netlink.rst | 76 +++++ Documentation/networking/timestamping.rst | 38 ++- include/uapi/linux/ethtool_netlink.h | 19 ++ net/ethtool/Makefile | 2 +- net/ethtool/netlink.c | 20 ++ net/ethtool/netlink.h | 3 + net/ethtool/tsconfig.c | 406 +++++++++++++++++++++++++++ 7 files changed, 549 insertions(+), 15 deletions(-) diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index 038d8c2ec655..291f61937f00 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -237,6 +237,8 @@ Userspace to kernel: ``ETHTOOL_MSG_MM_SET`` set MAC merge layer parameters ``ETHTOOL_MSG_MODULE_FW_FLASH_ACT`` flash transceiver module firmware ``ETHTOOL_MSG_PHY_GET`` get Ethernet PHY information + ``ETHTOOL_MSG_TSCONFIG_GET`` get hw timestamping configuration + ``ETHTOOL_MSG_TSCONFIG_SET`` set hw timestamping configuration ===================================== ================================= Kernel to userspace: @@ -286,6 +288,9 @@ Kernel to userspace: ``ETHTOOL_MSG_MODULE_FW_FLASH_NTF`` transceiver module flash updates ``ETHTOOL_MSG_PHY_GET_REPLY`` Ethernet PHY information ``ETHTOOL_MSG_PHY_NTF`` Ethernet PHY information + ``ETHTOOL_MSG_TSCONFIG_GET_REPLY`` hw timestamping configuration + ``ETHTOOL_MSG_TSCONFIG_SET_REPLY`` hw timestamping configuration + ``ETHTOOL_MSG_TSCONFIG_NTF`` hw timestamping configuration ======================================== ================================= ``GET`` requests are sent by userspace applications to retrieve device @@ -2244,6 +2249,75 @@ Kernel response contents: When ``ETHTOOL_A_PHY_UPSTREAM_TYPE`` is PHY_UPSTREAM_PHY, the PHY's parent is another PHY. +TSCONFIG_GET +============ + +Retrieves the information about the current hardware timestamping source and +configuration. + +It is similar to the deprecated ``SIOCGHWTSTAMP`` ioctl request. + +Request contents: + + ==================================== ====== ========================== + ``ETHTOOL_A_TSCONFIG_HEADER`` nested request header + ==================================== ====== ========================== + +Kernel response contents: + + ======================================== ====== ============================ + ``ETHTOOL_A_TSCONFIG_HEADER`` nested request header + ``ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER`` nested PTP hw clock provider + ``ETHTOOL_A_TSCONFIG_TX_TYPES`` bitset hwtstamp Tx type + ``ETHTOOL_A_TSCONFIG_RX_FILTERS`` bitset hwtstamp Rx filter + ``ETHTOOL_A_TSCONFIG_HWTSTAMP_FLAGS`` u32 hwtstamp flags + ======================================== ====== ============================ + +When set the ``ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER`` attribute identifies the +source of the hw timestamping provider. It is composed by +``ETHTOOL_A_TS_HWTSTAMP_PROVIDER_INDEX`` attribute which describe the index of +the PTP device and ``ETHTOOL_A_TS_HWTSTAMP_PROVIDER_QUALIFIER`` which describe +the qualifier of the timestamp. + +When set the ``ETHTOOL_A_TSCONFIG_TX_TYPES``, ``ETHTOOL_A_TSCONFIG_RX_FILTERS`` +and the ``ETHTOOL_A_TSCONFIG_HWTSTAMP_FLAGS`` attributes identify the Tx +type, the Rx filter and the flags configured for the current hw timestamping +provider. The attributes are propagated to the driver through the following +structure: + +.. kernel-doc:: include/linux/net_tstamp.h + :identifiers: kernel_hwtstamp_config + +TSCONFIG_SET +============ + +Set the information about the current hardware timestamping source and +configuration. + +It is similar to the deprecated ``SIOCSHWTSTAMP`` ioctl request. + +Request contents: + + ======================================== ====== ============================ + ``ETHTOOL_A_TSCONFIG_HEADER`` nested request header + ``ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER`` nested PTP hw clock provider + ``ETHTOOL_A_TSCONFIG_TX_TYPES`` bitset hwtstamp Tx type + ``ETHTOOL_A_TSCONFIG_RX_FILTERS`` bitset hwtstamp Rx filter + ``ETHTOOL_A_TSCONFIG_HWTSTAMP_FLAGS`` u32 hwtstamp flags + ======================================== ====== ============================ + +Kernel response contents: + + ======================================== ====== ============================ + ``ETHTOOL_A_TSCONFIG_HEADER`` nested request header + ``ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER`` nested PTP hw clock provider + ``ETHTOOL_A_TSCONFIG_TX_TYPES`` bitset hwtstamp Tx type + ``ETHTOOL_A_TSCONFIG_RX_FILTERS`` bitset hwtstamp Rx filter + ``ETHTOOL_A_TSCONFIG_HWTSTAMP_FLAGS`` u32 hwtstamp flags + ======================================== ====== ============================ + +For a description of each attribute, see ``TSCONFIG_GET``. + Request translation =================== @@ -2352,4 +2426,6 @@ are netlink only. n/a ``ETHTOOL_MSG_MM_SET`` n/a ``ETHTOOL_MSG_MODULE_FW_FLASH_ACT`` n/a ``ETHTOOL_MSG_PHY_GET`` + ``SIOCGHWTSTAMP`` ``ETHTOOL_MSG_TSCONFIG_GET`` + ``SIOCSHWTSTAMP`` ``ETHTOOL_MSG_TSCONFIG_SET`` =================================== ===================================== diff --git a/Documentation/networking/timestamping.rst b/Documentation/networking/timestamping.rst index b37bfbfc7d79..61ef9da10e28 100644 --- a/Documentation/networking/timestamping.rst +++ b/Documentation/networking/timestamping.rst @@ -525,8 +525,8 @@ implicitly defined. ts[0] holds a software timestamp if set, ts[1] is again deprecated and ts[2] holds a hardware timestamp if set. -3. Hardware Timestamping configuration: SIOCSHWTSTAMP and SIOCGHWTSTAMP -======================================================================= +3. Hardware Timestamping configuration: ETHTOOL_MSG_TSCONFIG_SET/GET +==================================================================== Hardware time stamping must also be initialized for each device driver that is expected to do hardware time stamping. The parameter is defined in @@ -539,12 +539,14 @@ include/uapi/linux/net_tstamp.h as:: }; Desired behavior is passed into the kernel and to a specific device by -calling ioctl(SIOCSHWTSTAMP) with a pointer to a struct ifreq whose -ifr_data points to a struct hwtstamp_config. The tx_type and -rx_filter are hints to the driver what it is expected to do. If -the requested fine-grained filtering for incoming packets is not -supported, the driver may time stamp more than just the requested types -of packets. +calling the tsconfig netlink socket ``ETHTOOL_MSG_TSCONFIG_SET``. +The ``ETHTOOL_A_TSCONFIG_TX_TYPES``, ``ETHTOOL_A_TSCONFIG_RX_FILTERS`` and +``ETHTOOL_A_TSCONFIG_HWTSTAMP_FLAGS`` netlink attributes are then used to set +the struct hwtstamp_config accordingly. + +The ``ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER`` netlink nested attribute is used +to select the source of the hardware time stamping. It is composed of an index +for the device source and a qualifier for the type of time stamping. Drivers are free to use a more permissive configuration than the requested configuration. It is expected that drivers should only implement directly the @@ -563,9 +565,16 @@ Only a processes with admin rights may change the configuration. User space is responsible to ensure that multiple processes don't interfere with each other and that the settings are reset. -Any process can read the actual configuration by passing this -structure to ioctl(SIOCGHWTSTAMP) in the same way. However, this has -not been implemented in all drivers. +Any process can read the actual configuration by requesting tsconfig netlink +socket ``ETHTOOL_MSG_TSCONFIG_GET``. + +The legacy configuration is the use of the ioctl(SIOCSHWTSTAMP) with a pointer +to a struct ifreq whose ifr_data points to a struct hwtstamp_config. +The tx_type and rx_filter are hints to the driver what it is expected to do. +If the requested fine-grained filtering for incoming packets is not +supported, the driver may time stamp more than just the requested types +of packets. ioctl(SIOCGHWTSTAMP) is used in the same way as the +ioctl(SIOCSHWTSTAMP). However, this has not been implemented in all drivers. :: @@ -610,9 +619,10 @@ not been implemented in all drivers. -------------------------------------------------------- A driver which supports hardware time stamping must support the -SIOCSHWTSTAMP ioctl and update the supplied struct hwtstamp_config with -the actual values as described in the section on SIOCSHWTSTAMP. It -should also support SIOCGHWTSTAMP. +ndo_hwtstamp_set NDO or the legacy SIOCSHWTSTAMP ioctl and update the +supplied struct hwtstamp_config with the actual values as described in +the section on SIOCSHWTSTAMP. It should also support ndo_hwtstamp_get or +the legacy SIOCGHWTSTAMP. Time stamps for received packets must be stored in the skb. To get a pointer to the shared time stamp structure of the skb call skb_hwtstamps(). Then diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index e892375389f1..4e96a4cf0831 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -59,6 +59,8 @@ enum { ETHTOOL_MSG_MM_SET, ETHTOOL_MSG_MODULE_FW_FLASH_ACT, ETHTOOL_MSG_PHY_GET, + ETHTOOL_MSG_TSCONFIG_GET, + ETHTOOL_MSG_TSCONFIG_SET, /* add new constants above here */ __ETHTOOL_MSG_USER_CNT, @@ -114,6 +116,9 @@ enum { ETHTOOL_MSG_MODULE_FW_FLASH_NTF, ETHTOOL_MSG_PHY_GET_REPLY, ETHTOOL_MSG_PHY_NTF, + ETHTOOL_MSG_TSCONFIG_GET_REPLY, + ETHTOOL_MSG_TSCONFIG_SET_REPLY, + ETHTOOL_MSG_TSCONFIG_NTF, /* add new constants above here */ __ETHTOOL_MSG_KERNEL_CNT, @@ -534,6 +539,20 @@ enum { }; +/* TSCONFIG */ +enum { + ETHTOOL_A_TSCONFIG_UNSPEC, + ETHTOOL_A_TSCONFIG_HEADER, /* nest - _A_HEADER_* */ + ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER, /* nest - *_TS_HWTSTAMP_PROVIDER_* */ + ETHTOOL_A_TSCONFIG_TX_TYPES, /* bitset */ + ETHTOOL_A_TSCONFIG_RX_FILTERS, /* bitset */ + ETHTOOL_A_TSCONFIG_HWTSTAMP_FLAGS, /* u32 */ + + /* add new constants above here */ + __ETHTOOL_A_TSCONFIG_CNT, + ETHTOOL_A_TSCONFIG_MAX = (__ETHTOOL_A_TSCONFIG_CNT - 1) +}; + /* PHC VCLOCKS */ enum { diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile index 9b540644ba31..a1490c4afe6b 100644 --- a/net/ethtool/Makefile +++ b/net/ethtool/Makefile @@ -9,4 +9,4 @@ ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o rss.o \ channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o \ tunnels.o fec.o eeprom.o stats.o phc_vclocks.o mm.o \ module.o cmis_fw_update.o cmis_cdb.o pse-pd.o plca.o mm.o \ - phy.o + phy.o tsconfig.o diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index 6ae1d91f36e7..c3c6a9384e95 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -394,6 +394,8 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { [ETHTOOL_MSG_PLCA_GET_STATUS] = ðnl_plca_status_request_ops, [ETHTOOL_MSG_MM_GET] = ðnl_mm_request_ops, [ETHTOOL_MSG_MM_SET] = ðnl_mm_request_ops, + [ETHTOOL_MSG_TSCONFIG_GET] = ðnl_tsconfig_request_ops, + [ETHTOOL_MSG_TSCONFIG_SET] = ðnl_tsconfig_request_ops, }; static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) @@ -723,6 +725,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { [ETHTOOL_MSG_MODULE_NTF] = ðnl_module_request_ops, [ETHTOOL_MSG_PLCA_NTF] = ðnl_plca_cfg_request_ops, [ETHTOOL_MSG_MM_NTF] = ðnl_mm_request_ops, + [ETHTOOL_MSG_TSCONFIG_NTF] = ðnl_tsconfig_request_ops, }; /* default notification handler */ @@ -821,6 +824,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = { [ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify, [ETHTOOL_MSG_PLCA_NTF] = ethnl_default_notify, [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify, + [ETHTOOL_MSG_TSCONFIG_NTF] = ethnl_default_notify, }; void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) @@ -1243,6 +1247,22 @@ static const struct genl_ops ethtool_genl_ops[] = { .policy = ethnl_phy_get_policy, .maxattr = ARRAY_SIZE(ethnl_phy_get_policy) - 1, }, + { + .cmd = ETHTOOL_MSG_TSCONFIG_GET, + .doit = ethnl_default_doit, + .start = ethnl_default_start, + .dumpit = ethnl_default_dumpit, + .done = ethnl_default_done, + .policy = ethnl_tsconfig_get_policy, + .maxattr = ARRAY_SIZE(ethnl_tsconfig_get_policy) - 1, + }, + { + .cmd = ETHTOOL_MSG_TSCONFIG_SET, + .flags = GENL_UNS_ADMIN_PERM, + .doit = ethnl_default_set_doit, + .policy = ethnl_tsconfig_set_policy, + .maxattr = ARRAY_SIZE(ethnl_tsconfig_set_policy) - 1, + }, }; static const struct genl_multicast_group ethtool_nl_mcgrps[] = { diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h index 960cda13e4fc..0a09298fff92 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -435,6 +435,7 @@ extern const struct ethnl_request_ops ethnl_plca_cfg_request_ops; extern const struct ethnl_request_ops ethnl_plca_status_request_ops; extern const struct ethnl_request_ops ethnl_mm_request_ops; extern const struct ethnl_request_ops ethnl_phy_request_ops; +extern const struct ethnl_request_ops ethnl_tsconfig_request_ops; extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1]; extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1]; @@ -485,6 +486,8 @@ extern const struct nla_policy ethnl_mm_get_policy[ETHTOOL_A_MM_HEADER + 1]; extern const struct nla_policy ethnl_mm_set_policy[ETHTOOL_A_MM_MAX + 1]; extern const struct nla_policy ethnl_module_fw_flash_act_policy[ETHTOOL_A_MODULE_FW_FLASH_PASSWORD + 1]; extern const struct nla_policy ethnl_phy_get_policy[ETHTOOL_A_PHY_HEADER + 1]; +extern const struct nla_policy ethnl_tsconfig_get_policy[ETHTOOL_A_TSCONFIG_HEADER + 1]; +extern const struct nla_policy ethnl_tsconfig_set_policy[ETHTOOL_A_TSCONFIG_MAX + 1]; int ethnl_set_features(struct sk_buff *skb, struct genl_info *info); int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info); diff --git a/net/ethtool/tsconfig.c b/net/ethtool/tsconfig.c new file mode 100644 index 000000000000..f9d915926a96 --- /dev/null +++ b/net/ethtool/tsconfig.c @@ -0,0 +1,406 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include + +#include "netlink.h" +#include "common.h" +#include "bitset.h" +#include "../core/dev.h" +#include "ts.h" + +struct tsconfig_req_info { + struct ethnl_req_info base; +}; + +struct tsconfig_reply_data { + struct ethnl_reply_data base; + struct hwtst_provider hwtst; + struct { + u32 tx_type; + u32 rx_filter; + u32 flags; + } hwtst_config; +}; + +#define TSCONFIG_REPDATA(__reply_base) \ + container_of(__reply_base, struct tsconfig_reply_data, base) + +const struct nla_policy ethnl_tsconfig_get_policy[ETHTOOL_A_TSCONFIG_HEADER + 1] = { + [ETHTOOL_A_TSCONFIG_HEADER] = + NLA_POLICY_NESTED(ethnl_header_policy), +}; + +static int tsconfig_prepare_data(const struct ethnl_req_info *req_base, + struct ethnl_reply_data *reply_base, + const struct genl_info *info) +{ + struct tsconfig_reply_data *data = TSCONFIG_REPDATA(reply_base); + struct hwtstamp_provider *hwtstamp = NULL; + struct net_device *dev = reply_base->dev; + struct kernel_hwtstamp_config cfg = {}; + int ret; + + if (!dev->netdev_ops->ndo_hwtstamp_get) + return -EOPNOTSUPP; + + ret = ethnl_ops_begin(dev); + if (ret < 0) + return ret; + + ret = dev_get_hwtstamp_phylib(dev, &cfg); + if (ret) + goto out; + + data->hwtst_config.tx_type = BIT(cfg.tx_type); + data->hwtst_config.rx_filter = BIT(cfg.rx_filter); + data->hwtst_config.flags = BIT(cfg.flags); + + data->hwtst.index = -1; + hwtstamp = rtnl_dereference(dev->hwtstamp); + if (hwtstamp) { + data->hwtst.index = ptp_clock_index(hwtstamp->ptp); + data->hwtst.qualifier = hwtstamp->qualifier; + } + +out: + ethnl_ops_complete(dev); + return ret; +} + +static int tsconfig_reply_size(const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + const struct tsconfig_reply_data *data = TSCONFIG_REPDATA(reply_base); + bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; + int len = 0; + int ret; + + BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32); + BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32); + + if (data->hwtst_config.flags) + /* _TSCONFIG_HWTSTAMP_FLAGS */ + len += nla_total_size(sizeof(u32)); + + if (data->hwtst_config.tx_type) { + ret = ethnl_bitset32_size(&data->hwtst_config.tx_type, + NULL, __HWTSTAMP_TX_CNT, + ts_tx_type_names, compact); + if (ret < 0) + return ret; + len += ret; /* _TSCONFIG_TX_TYPES */ + } + if (data->hwtst_config.rx_filter) { + ret = ethnl_bitset32_size(&data->hwtst_config.rx_filter, + NULL, __HWTSTAMP_FILTER_CNT, + ts_rx_filter_names, compact); + if (ret < 0) + return ret; + len += ret; /* _TSCONFIG_RX_FILTERS */ + } + + if (data->hwtst.index >= 0) + /* _TSCONFIG_HWTSTAMP_PROVIDER */ + len += nla_total_size(0) + + 2 * nla_total_size(sizeof(u32)); + + return len; +} + +static int tsconfig_fill_reply(struct sk_buff *skb, + const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + const struct tsconfig_reply_data *data = TSCONFIG_REPDATA(reply_base); + bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; + int ret; + + if (data->hwtst_config.flags) { + ret = nla_put_u32(skb, ETHTOOL_A_TSCONFIG_HWTSTAMP_FLAGS, + data->hwtst_config.flags); + if (ret < 0) + return ret; + } + + if (data->hwtst_config.tx_type) { + ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSCONFIG_TX_TYPES, + &data->hwtst_config.tx_type, NULL, + __HWTSTAMP_TX_CNT, + ts_tx_type_names, compact); + if (ret < 0) + return ret; + } + + if (data->hwtst_config.rx_filter) { + ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSCONFIG_RX_FILTERS, + &data->hwtst_config.rx_filter, + NULL, __HWTSTAMP_FILTER_CNT, + ts_rx_filter_names, compact); + if (ret < 0) + return ret; + } + + if (data->hwtst.index >= 0) { + struct nlattr *nest; + + nest = nla_nest_start(skb, ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER); + if (!nest) + return -EMSGSIZE; + + if (nla_put_u32(skb, ETHTOOL_A_TS_HWTSTAMP_PROVIDER_INDEX, + data->hwtst.index) || + nla_put_u32(skb, + ETHTOOL_A_TS_HWTSTAMP_PROVIDER_QUALIFIER, + data->hwtst.qualifier)) { + nla_nest_cancel(skb, nest); + return -EMSGSIZE; + } + + nla_nest_end(skb, nest); + } + return 0; +} + +/* TSCONFIG_SET */ +const struct nla_policy ethnl_tsconfig_set_policy[ETHTOOL_A_TSCONFIG_MAX + 1] = { + [ETHTOOL_A_TSCONFIG_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), + [ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER] = { .type = NLA_NESTED }, + [ETHTOOL_A_TSCONFIG_HWTSTAMP_FLAGS] = { .type = NLA_U32 }, + [ETHTOOL_A_TSCONFIG_RX_FILTERS] = { .type = NLA_NESTED }, + [ETHTOOL_A_TSCONFIG_TX_TYPES] = { .type = NLA_NESTED }, +}; + +static int tsconfig_send_reply(struct net_device *dev, struct genl_info *info) +{ + struct tsconfig_reply_data *reply_data; + struct tsconfig_req_info *req_info; + struct sk_buff *rskb; + void *reply_payload; + int reply_len = 0; + int ret; + + req_info = kzalloc(sizeof(*req_info), GFP_KERNEL); + if (!req_info) + return -ENOMEM; + reply_data = kmalloc(sizeof(*reply_data), GFP_KERNEL); + if (!reply_data) { + kfree(req_info); + return -ENOMEM; + } + + ASSERT_RTNL(); + reply_data->base.dev = dev; + ret = tsconfig_prepare_data(&req_info->base, &reply_data->base, info); + if (ret < 0) + goto err_cleanup; + + ret = tsconfig_reply_size(&req_info->base, &reply_data->base); + if (ret < 0) + goto err_cleanup; + + reply_len = ret + ethnl_reply_header_size(); + rskb = ethnl_reply_init(reply_len, dev, ETHTOOL_MSG_TSCONFIG_SET_REPLY, + ETHTOOL_A_TSCONFIG_HEADER, info, &reply_payload); + if (!rskb) + goto err_cleanup; + + ret = tsconfig_fill_reply(rskb, &req_info->base, &reply_data->base); + if (ret < 0) + goto err_cleanup; + + genlmsg_end(rskb, reply_payload); + ret = genlmsg_reply(rskb, info); + +err_cleanup: + kfree(reply_data); + kfree(req_info); + return ret; +} + +static int ethnl_set_tsconfig_validate(struct ethnl_req_info *req_base, + struct genl_info *info) +{ + const struct net_device_ops *ops = req_base->dev->netdev_ops; + + if (!ops->ndo_hwtstamp_set || !ops->ndo_hwtstamp_get) + return -EOPNOTSUPP; + + return 1; +} + +static int ethnl_set_tsconfig(struct ethnl_req_info *req_base, + struct genl_info *info) +{ + struct kernel_hwtstamp_config hwtst_config = {0}, _hwtst_config = {0}; + unsigned long mask = 0, req_rx_filter, req_tx_type; + struct hwtstamp_provider *hwtstamp = NULL; + struct net_device *dev = req_base->dev; + struct nlattr **tb = info->attrs; + bool mod = false; + int ret; + + BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32); + BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32); + + if (!netif_device_present(dev)) + return -ENODEV; + + if (tb[ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER]) { + struct hwtst_provider __hwtst = {.index = -1}; + struct hwtstamp_provider *__hwtstamp; + + __hwtstamp = rtnl_dereference(dev->hwtstamp); + if (__hwtstamp) { + __hwtst.index = ptp_clock_index(__hwtstamp->ptp); + __hwtst.qualifier = __hwtstamp->qualifier; + } + + ret = ts_parse_hwtst_provider(tb[ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER], + &__hwtst, info->extack, + &mod); + if (ret < 0) + return ret; + + if (mod) { + hwtstamp = kzalloc(sizeof(*hwtstamp), GFP_KERNEL); + if (!hwtstamp) + return -ENOMEM; + + hwtstamp->ptp = ptp_clock_get_by_index(&dev->dev, + __hwtst.index); + if (!hwtstamp->ptp) { + NL_SET_ERR_MSG_ATTR(info->extack, + tb[ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER], + "no phc at such index"); + ret = -ENODEV; + goto err_free_hwtstamp; + } + hwtstamp->qualifier = __hwtst.qualifier; + hwtstamp->dev = &dev->dev; + + /* Does the hwtstamp supported in the netdev topology */ + if (!netdev_support_hwtstamp(dev, hwtstamp)) { + NL_SET_ERR_MSG_ATTR(info->extack, + tb[ETHTOOL_A_TSCONFIG_HWTSTAMP_PROVIDER], + "phc not in this net device topology"); + ret = -ENODEV; + goto err_clock_put; + } + } + } + + /* Get the hwtstamp config from netlink */ + if (tb[ETHTOOL_A_TSCONFIG_TX_TYPES]) { + ret = ethnl_parse_bitset(&req_tx_type, &mask, + __HWTSTAMP_TX_CNT, + tb[ETHTOOL_A_TSCONFIG_TX_TYPES], + ts_tx_type_names, info->extack); + if (ret < 0) + goto err_clock_put; + + /* Select only one tx type at a time */ + if (ffs(req_tx_type) != fls(req_tx_type)) { + ret = -EINVAL; + goto err_clock_put; + } + + hwtst_config.tx_type = ffs(req_tx_type) - 1; + } + if (tb[ETHTOOL_A_TSCONFIG_RX_FILTERS]) { + ret = ethnl_parse_bitset(&req_rx_filter, &mask, + __HWTSTAMP_FILTER_CNT, + tb[ETHTOOL_A_TSCONFIG_RX_FILTERS], + ts_rx_filter_names, info->extack); + if (ret < 0) + goto err_clock_put; + + /* Select only one rx filter at a time */ + if (ffs(req_rx_filter) != fls(req_rx_filter)) { + ret = -EINVAL; + goto err_clock_put; + } + + hwtst_config.rx_filter = ffs(req_rx_filter) - 1; + } + if (tb[ETHTOOL_A_TSCONFIG_HWTSTAMP_FLAGS]) { + ret = nla_get_u32(tb[ETHTOOL_A_TSCONFIG_HWTSTAMP_FLAGS]); + if (ret < 0) + goto err_clock_put; + hwtst_config.flags = ret; + } + + ret = net_hwtstamp_validate(&hwtst_config); + if (ret) + goto err_clock_put; + + if (mod) { + struct kernel_hwtstamp_config zero_config = {0}; + struct hwtstamp_provider *__hwtstamp; + + /* Disable current time stamping if we try to enable + * another one + */ + ret = dev_set_hwtstamp_phylib(dev, &zero_config, info->extack); + if (ret < 0) + goto err_clock_put; + + /* Change the selected hwtstamp source */ + __hwtstamp = rcu_replace_pointer_rtnl(dev->hwtstamp, hwtstamp); + if (__hwtstamp) + call_rcu(&__hwtstamp->rcu_head, + remove_hwtstamp_provider); + } else { + /* Get current hwtstamp config if we are not changing the + * hwtstamp source + */ + ret = dev_get_hwtstamp_phylib(dev, &_hwtst_config); + if (ret < 0 && ret != -EOPNOTSUPP) + goto err_clock_put; + } + + if (memcmp(&hwtst_config, &_hwtst_config, sizeof(hwtst_config))) { + ret = dev_set_hwtstamp_phylib(dev, &hwtst_config, + info->extack); + if (ret < 0) + return ret; + + ret = tsconfig_send_reply(dev, info); + if (ret && ret != -EOPNOTSUPP) { + NL_SET_ERR_MSG(info->extack, + "error while reading the new configuration set"); + return ret; + } + + return 1; + } + + if (mod) + return 1; + + return 0; + +err_clock_put: + if (hwtstamp) + ptp_clock_put(&dev->dev, hwtstamp->ptp); +err_free_hwtstamp: + kfree(hwtstamp); + + return ret; +} + +const struct ethnl_request_ops ethnl_tsconfig_request_ops = { + .request_cmd = ETHTOOL_MSG_TSCONFIG_GET, + .reply_cmd = ETHTOOL_MSG_TSCONFIG_GET_REPLY, + .hdr_attr = ETHTOOL_A_TSCONFIG_HEADER, + .req_info_size = sizeof(struct tsconfig_req_info), + .reply_data_size = sizeof(struct tsconfig_reply_data), + + .prepare_data = tsconfig_prepare_data, + .reply_size = tsconfig_reply_size, + .fill_reply = tsconfig_fill_reply, + + .set_validate = ethnl_set_tsconfig_validate, + .set = ethnl_set_tsconfig, + .set_ntf_cmd = ETHTOOL_MSG_TSCONFIG_NTF, +};