From patchwork Wed Dec 2 04:53:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinicius Costa Gomes X-Patchwork-Id: 11944707 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C6CC6C64E7C for ; Wed, 2 Dec 2020 04:54:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6865822203 for ; Wed, 2 Dec 2020 04:54:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728431AbgLBEyr (ORCPT ); Tue, 1 Dec 2020 23:54:47 -0500 Received: from mga04.intel.com ([192.55.52.120]:43301 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726178AbgLBEyr (ORCPT ); Tue, 1 Dec 2020 23:54:47 -0500 IronPort-SDR: L1EJQI0Noj4GP+gzlssrR7Gl06+QB8EqRNEn+wRXo9PCCi1kqjN43nPYQwXaO9nxeSvSligCIS lLkx1dY4h5IA== X-IronPort-AV: E=McAfee;i="6000,8403,9822"; a="170387532" X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="170387532" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:48 -0800 IronPort-SDR: ZdGKKN3r6J/OH7/iRSHKmp9iVxlGzi+8kDwUUJGBhgtO4175dg7lYQxtwD/O8pGFMnQ7cJOGLa +Br4toXPu8Bw== X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="549888361" Received: from shivanif-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.212.152.222]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:47 -0800 From: Vinicius Costa Gomes To: netdev@vger.kernel.org Cc: Vinicius Costa Gomes , jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, kuba@kernel.org, m-karicheri2@ti.com, vladimir.oltean@nxp.com, Jose.Abreu@synopsys.com, po.liu@nxp.com, intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com Subject: [PATCH net-next v1 1/9] ethtool: Add support for configuring frame preemption Date: Tue, 1 Dec 2020 20:53:17 -0800 Message-Id: <20201202045325.3254757-2-vinicius.gomes@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201202045325.3254757-1-vinicius.gomes@intel.com> References: <20201202045325.3254757-1-vinicius.gomes@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Frame preemption (described in IEEE 802.3br-2016) defines the concept of preemptible and express queues. It allows traffic from express queues to "interrupt" traffic from preemptible queues, which are "resumed" after the express traffic has finished transmitting. Frame preemption can only be used when both the local device and the link partner support it. Only parameters for enabling/disabling frame preemption and configuring the minimum fragment size are included here. Expressing which queues are marked as preemptible is left to mqprio/taprio, as having that information there should be easier on the user. Signed-off-by: Vinicius Costa Gomes --- include/linux/ethtool.h | 19 ++++ include/uapi/linux/ethtool_netlink.h | 17 +++ net/ethtool/Makefile | 2 +- net/ethtool/netlink.c | 19 ++++ net/ethtool/netlink.h | 4 + net/ethtool/preempt.c | 151 +++++++++++++++++++++++++++ 6 files changed, 211 insertions(+), 1 deletion(-) create mode 100644 net/ethtool/preempt.c diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index e3da25b51ae4..16d6ee29a6ac 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -263,6 +263,19 @@ struct ethtool_pause_stats { u64 rx_pause_frames; }; +/** + * struct ethtool_fp - Frame Preemption information + * + * @enabled: Enable frame preemption. + * + * @min_frag_size_mult: Minimum size for all non-final fragment size, + * expressed in terms of X in '(1 + X)*64 + 4' + */ +struct ethtool_fp { + u8 enabled; + u8 min_frag_size_mult; +}; + /** * struct ethtool_ops - optional netdev operations * @supported_coalesce_params: supported types of interrupt coalescing. @@ -406,6 +419,8 @@ struct ethtool_pause_stats { * @get_ethtool_phy_stats: Return extended statistics about the PHY device. * This is only useful if the device maintains PHY statistics and * cannot use the standard PHY library helpers. + * @get_preempt: Get the network device Frame Preemption parameters. + * @set_preempt: Set the network device Frame Preemption parameters. * * All operations are optional (i.e. the function pointer may be set * to %NULL) and callers must take this into account. Callers must @@ -504,6 +519,10 @@ struct ethtool_ops { struct ethtool_fecparam *); int (*set_fecparam)(struct net_device *, struct ethtool_fecparam *); + int (*get_preempt)(struct net_device *, + struct ethtool_fp *); + int (*set_preempt)(struct net_device *, + struct ethtool_fp *); void (*get_ethtool_phy_stats)(struct net_device *, struct ethtool_stats *, u64 *); int (*get_phy_tunable)(struct net_device *, diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index e2bf36e6964b..0b3dc0c263a9 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -42,6 +42,8 @@ enum { ETHTOOL_MSG_CABLE_TEST_ACT, ETHTOOL_MSG_CABLE_TEST_TDR_ACT, ETHTOOL_MSG_TUNNEL_INFO_GET, + ETHTOOL_MSG_PREEMPT_GET, + ETHTOOL_MSG_PREEMPT_SET, /* add new constants above here */ __ETHTOOL_MSG_USER_CNT, @@ -80,6 +82,8 @@ enum { ETHTOOL_MSG_CABLE_TEST_NTF, ETHTOOL_MSG_CABLE_TEST_TDR_NTF, ETHTOOL_MSG_TUNNEL_INFO_GET_REPLY, + ETHTOOL_MSG_PREEMPT_GET_REPLY, + ETHTOOL_MSG_PREEMPT_NTF, /* add new constants above here */ __ETHTOOL_MSG_KERNEL_CNT, @@ -628,6 +632,19 @@ enum { ETHTOOL_A_TUNNEL_INFO_MAX = (__ETHTOOL_A_TUNNEL_INFO_CNT - 1) }; +/* FRAME PREEMPTION */ + +enum { + ETHTOOL_A_PREEMPT_UNSPEC, + ETHTOOL_A_PREEMPT_HEADER, /* nest - _A_HEADER_* */ + ETHTOOL_A_PREEMPT_ENABLED, /* u8 */ + ETHTOOL_A_PREEMPT_MIN_FRAG_SIZE_MULT, /* u8 */ + + /* add new constants above here */ + __ETHTOOL_A_PREEMPT_CNT, + ETHTOOL_A_PREEMPT_MAX = (__ETHTOOL_A_PREEMPT_CNT - 1) +}; + /* generic netlink info */ #define ETHTOOL_GENL_NAME "ethtool" #define ETHTOOL_GENL_VERSION 1 diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile index 7a849ff22dad..4e584903e3ef 100644 --- a/net/ethtool/Makefile +++ b/net/ethtool/Makefile @@ -7,4 +7,4 @@ obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \ linkstate.o debug.o wol.o features.o privflags.o rings.o \ channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o \ - tunnels.o + tunnels.o preempt.o diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index 50d3c8896f91..bc7d66e3ba38 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -245,6 +245,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { [ETHTOOL_MSG_PAUSE_GET] = ðnl_pause_request_ops, [ETHTOOL_MSG_EEE_GET] = ðnl_eee_request_ops, [ETHTOOL_MSG_TSINFO_GET] = ðnl_tsinfo_request_ops, + [ETHTOOL_MSG_PREEMPT_GET] = ðnl_preempt_request_ops, }; static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) @@ -551,6 +552,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops, [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops, [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops, + [ETHTOOL_MSG_PREEMPT_NTF] = ðnl_preempt_request_ops, }; /* default notification handler */ @@ -643,6 +645,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = { [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify, [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify, [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify, + [ETHTOOL_MSG_PREEMPT_NTF] = ethnl_default_notify, }; void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) @@ -912,6 +915,22 @@ static const struct genl_ops ethtool_genl_ops[] = { .policy = ethnl_tunnel_info_get_policy, .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1, }, + { + .cmd = ETHTOOL_MSG_PREEMPT_GET, + .doit = ethnl_default_doit, + .start = ethnl_default_start, + .dumpit = ethnl_default_dumpit, + .done = ethnl_default_done, + .policy = ethnl_preempt_get_policy, + .maxattr = ARRAY_SIZE(ethnl_preempt_get_policy) - 1, + }, + { + .cmd = ETHTOOL_MSG_PREEMPT_SET, + .flags = GENL_UNS_ADMIN_PERM, + .doit = ethnl_set_preempt, + .policy = ethnl_preempt_set_policy, + .maxattr = ARRAY_SIZE(ethnl_preempt_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 d8efec516d86..8f65e53ccd59 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -344,6 +344,7 @@ extern const struct ethnl_request_ops ethnl_coalesce_request_ops; extern const struct ethnl_request_ops ethnl_pause_request_ops; extern const struct ethnl_request_ops ethnl_eee_request_ops; extern const struct ethnl_request_ops ethnl_tsinfo_request_ops; +extern const struct ethnl_request_ops ethnl_preempt_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]; @@ -375,6 +376,8 @@ extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_HEADER + extern const struct nla_policy ethnl_cable_test_act_policy[ETHTOOL_A_CABLE_TEST_HEADER + 1]; extern const struct nla_policy ethnl_cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_CFG + 1]; extern const struct nla_policy ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_HEADER + 1]; +extern const struct nla_policy ethnl_preempt_get_policy[ETHTOOL_A_PREEMPT_MAX + 1]; +extern const struct nla_policy ethnl_preempt_set_policy[ETHTOOL_A_PREEMPT_MAX + 1]; int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info); int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info); @@ -392,5 +395,6 @@ int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info); int ethnl_tunnel_info_doit(struct sk_buff *skb, struct genl_info *info); int ethnl_tunnel_info_start(struct netlink_callback *cb); int ethnl_tunnel_info_dumpit(struct sk_buff *skb, struct netlink_callback *cb); +int ethnl_set_preempt(struct sk_buff *skb, struct genl_info *info); #endif /* _NET_ETHTOOL_NETLINK_H */ diff --git a/net/ethtool/preempt.c b/net/ethtool/preempt.c new file mode 100644 index 000000000000..4d97d1180a65 --- /dev/null +++ b/net/ethtool/preempt.c @@ -0,0 +1,151 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include "netlink.h" +#include "common.h" + +struct preempt_req_info { + struct ethnl_req_info base; +}; + +struct preempt_reply_data { + struct ethnl_reply_data base; + struct ethtool_fp fp; +}; + +#define PREEMPT_REPDATA(__reply_base) \ + container_of(__reply_base, struct preempt_reply_data, base) + +const struct nla_policy +ethnl_preempt_get_policy[ETHTOOL_A_PREEMPT_MAX + 1] = { + [ETHTOOL_A_PREEMPT_UNSPEC] = { .type = NLA_REJECT }, + [ETHTOOL_A_PREEMPT_HEADER] = { .type = NLA_NESTED }, + [ETHTOOL_A_PREEMPT_ENABLED] = { .type = NLA_REJECT }, + [ETHTOOL_A_PREEMPT_MIN_FRAG_SIZE_MULT] = { .type = NLA_REJECT }, +}; + +static int preempt_prepare_data(const struct ethnl_req_info *req_base, + struct ethnl_reply_data *reply_base, + struct genl_info *info) +{ + struct preempt_reply_data *data = PREEMPT_REPDATA(reply_base); + struct net_device *dev = reply_base->dev; + int ret; + + if (!dev->ethtool_ops->get_preempt) + return -EOPNOTSUPP; + + ret = ethnl_ops_begin(dev); + if (ret < 0) + return ret; + + ret = dev->ethtool_ops->get_preempt(dev, &data->fp); + ethnl_ops_complete(dev); + + return ret; +} + +static int preempt_reply_size(const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + int len = 0; + + len += nla_total_size(sizeof(u8)); /* _PREEMPT_ENABLED */ + len += nla_total_size(sizeof(u8)); /* _PREEMPT_MIN_FRAG_SIZE */ + + return len; +} + +static int preempt_fill_reply(struct sk_buff *skb, + const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + const struct preempt_reply_data *data = PREEMPT_REPDATA(reply_base); + const struct ethtool_fp *preempt = &data->fp; + + if (nla_put_u8(skb, ETHTOOL_A_PREEMPT_ENABLED, preempt->enabled)) + return -EMSGSIZE; + + if (nla_put_u8(skb, ETHTOOL_A_PREEMPT_MIN_FRAG_SIZE_MULT, + preempt->min_frag_size_mult)) + return -EMSGSIZE; + + return 0; +} + +const struct ethnl_request_ops ethnl_preempt_request_ops = { + .request_cmd = ETHTOOL_MSG_PREEMPT_GET, + .reply_cmd = ETHTOOL_MSG_PREEMPT_GET_REPLY, + .hdr_attr = ETHTOOL_A_PREEMPT_HEADER, + .req_info_size = sizeof(struct preempt_req_info), + .reply_data_size = sizeof(struct preempt_reply_data), + + .prepare_data = preempt_prepare_data, + .reply_size = preempt_reply_size, + .fill_reply = preempt_fill_reply, +}; + +const struct nla_policy +ethnl_preempt_set_policy[ETHTOOL_A_PREEMPT_MAX + 1] = { + [ETHTOOL_A_PREEMPT_UNSPEC] = { .type = NLA_REJECT }, + [ETHTOOL_A_PREEMPT_HEADER] = { .type = NLA_NESTED }, + [ETHTOOL_A_PREEMPT_ENABLED] = { .type = NLA_U8 }, + [ETHTOOL_A_PREEMPT_MIN_FRAG_SIZE_MULT] = { .type = NLA_U8 }, +}; + +int ethnl_set_preempt(struct sk_buff *skb, struct genl_info *info) +{ + struct ethnl_req_info req_info = {}; + struct nlattr **tb = info->attrs; + struct ethtool_fp preempt = {}; + struct net_device *dev; + bool mod = false; + int ret; + + ret = ethnl_parse_header_dev_get(&req_info, + tb[ETHTOOL_A_PREEMPT_HEADER], + genl_info_net(info), info->extack, + true); + if (ret < 0) + return ret; + dev = req_info.dev; + ret = -EOPNOTSUPP; + if (!dev->ethtool_ops->get_preempt || + !dev->ethtool_ops->set_preempt) + goto out_dev; + + rtnl_lock(); + ret = ethnl_ops_begin(dev); + if (ret < 0) + goto out_rtnl; + + ret = dev->ethtool_ops->get_preempt(dev, &preempt); + if (ret < 0) { + GENL_SET_ERR_MSG(info, "failed to retrieve frame preemption settings"); + goto out_ops; + } + + ethnl_update_u8(&preempt.enabled, + tb[ETHTOOL_A_PREEMPT_ENABLED], &mod); + ethnl_update_u8(&preempt.min_frag_size_mult, + tb[ETHTOOL_A_PREEMPT_MIN_FRAG_SIZE_MULT], &mod); + + ret = 0; + if (!mod) + goto out_ops; + + ret = dev->ethtool_ops->set_preempt(dev, &preempt); + if (ret < 0) { + GENL_SET_ERR_MSG(info, "frame preemption settings update failed"); + goto out_ops; + } + + ethtool_notify(dev, ETHTOOL_MSG_PREEMPT_NTF, NULL); + +out_ops: + ethnl_ops_complete(dev); +out_rtnl: + rtnl_unlock(); +out_dev: + dev_put(dev); + return ret; +} From patchwork Wed Dec 2 04:53:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinicius Costa Gomes X-Patchwork-Id: 11944717 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FB2EC64E8A for ; Wed, 2 Dec 2020 04:55:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1511722203 for ; Wed, 2 Dec 2020 04:55:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387493AbgLBEzS (ORCPT ); Tue, 1 Dec 2020 23:55:18 -0500 Received: from mga04.intel.com ([192.55.52.120]:43301 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387474AbgLBEzR (ORCPT ); Tue, 1 Dec 2020 23:55:17 -0500 IronPort-SDR: svbAePoZHTac3XeWI+KHRwG+bRyP8mZzUgk9cuXkLTpZllLrnF/Md0rJbmlUfZ9i3qsWDP7CWI +OPSnVDlAI2g== X-IronPort-AV: E=McAfee;i="6000,8403,9822"; a="170387533" X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="170387533" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:48 -0800 IronPort-SDR: QEkx5IKF1j1R+3BDnUUL/jUyX8o95LQF8VDM9afyt12KFJPSFyEkSzORatRkF2P3XwvhlNywhO Ia4ZhhddrIng== X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="549888366" Received: from shivanif-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.212.152.222]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:47 -0800 From: Vinicius Costa Gomes To: netdev@vger.kernel.org Cc: Vinicius Costa Gomes , jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, kuba@kernel.org, m-karicheri2@ti.com, vladimir.oltean@nxp.com, Jose.Abreu@synopsys.com, po.liu@nxp.com, intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com Subject: [PATCH net-next v1 2/9] taprio: Add support for frame preemption offload Date: Tue, 1 Dec 2020 20:53:18 -0800 Message-Id: <20201202045325.3254757-3-vinicius.gomes@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201202045325.3254757-1-vinicius.gomes@intel.com> References: <20201202045325.3254757-1-vinicius.gomes@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org This adds a way to configure which queues are marked as preemptible and which are marked as express. Even if this is not a "real" offload, because it can't be executed purely in software, having this information near where the mapping of queues is specified, makes it, hopefully, easier to understand. Signed-off-by: Vinicius Costa Gomes --- include/linux/netdevice.h | 1 + include/net/pkt_sched.h | 4 ++++ include/uapi/linux/pkt_sched.h | 1 + net/sched/sch_taprio.c | 41 ++++++++++++++++++++++++++++++---- 4 files changed, 43 insertions(+), 4 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 8eeb73ac58bd..d7a99e769e79 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -852,6 +852,7 @@ enum tc_setup_type { TC_SETUP_QDISC_ETS, TC_SETUP_QDISC_TBF, TC_SETUP_QDISC_FIFO, + TC_SETUP_PREEMPT, }; /* These structures hold the attributes of bpf state that are being passed diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h index 15b1b30f454e..be5ff1535332 100644 --- a/include/net/pkt_sched.h +++ b/include/net/pkt_sched.h @@ -183,6 +183,10 @@ struct tc_taprio_qopt_offload { struct tc_taprio_sched_entry entries[]; }; +struct tc_preempt_qopt_offload { + u32 preemptible_queues; +}; + /* Reference counting */ struct tc_taprio_qopt_offload *taprio_offload_get(struct tc_taprio_qopt_offload *offload); diff --git a/include/uapi/linux/pkt_sched.h b/include/uapi/linux/pkt_sched.h index 9e7c2c607845..f0240ddaeee3 100644 --- a/include/uapi/linux/pkt_sched.h +++ b/include/uapi/linux/pkt_sched.h @@ -1240,6 +1240,7 @@ enum { TCA_TAPRIO_ATTR_SCHED_CYCLE_TIME_EXTENSION, /* s64 */ TCA_TAPRIO_ATTR_FLAGS, /* u32 */ TCA_TAPRIO_ATTR_TXTIME_DELAY, /* u32 */ + TCA_TAPRIO_ATTR_PREEMPT_QUEUES, /* u32 */ __TCA_TAPRIO_ATTR_MAX, }; diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c index 26fb8a62996b..c482c5d211bb 100644 --- a/net/sched/sch_taprio.c +++ b/net/sched/sch_taprio.c @@ -64,6 +64,7 @@ struct taprio_sched { struct Qdisc **qdiscs; struct Qdisc *root; u32 flags; + u32 preemptible_queues; enum tk_offsets tk_offset; int clockid; atomic64_t picos_per_byte; /* Using picoseconds because for 10Gbps+ @@ -776,6 +777,7 @@ static const struct nla_policy taprio_policy[TCA_TAPRIO_ATTR_MAX + 1] = { [TCA_TAPRIO_ATTR_SCHED_CYCLE_TIME_EXTENSION] = { .type = NLA_S64 }, [TCA_TAPRIO_ATTR_FLAGS] = { .type = NLA_U32 }, [TCA_TAPRIO_ATTR_TXTIME_DELAY] = { .type = NLA_U32 }, + [TCA_TAPRIO_ATTR_PREEMPT_QUEUES] = { .type = NLA_U32 }, }; static int fill_sched_entry(struct taprio_sched *q, struct nlattr **tb, @@ -1268,6 +1270,7 @@ static int taprio_disable_offload(struct net_device *dev, struct netlink_ext_ack *extack) { const struct net_device_ops *ops = dev->netdev_ops; + struct tc_preempt_qopt_offload preempt = { }; struct tc_taprio_qopt_offload *offload; int err; @@ -1286,13 +1289,15 @@ static int taprio_disable_offload(struct net_device *dev, offload->enable = 0; err = ops->ndo_setup_tc(dev, TC_SETUP_QDISC_TAPRIO, offload); - if (err < 0) { + if (err < 0) + NL_SET_ERR_MSG(extack, + "Device failed to disable offload"); + + err = ops->ndo_setup_tc(dev, TC_SETUP_PREEMPT, &preempt); + if (err < 0) NL_SET_ERR_MSG(extack, "Device failed to disable offload"); - goto out; - } -out: taprio_offload_free(offload); return err; @@ -1509,6 +1514,29 @@ static int taprio_change(struct Qdisc *sch, struct nlattr *opt, mqprio->prio_tc_map[i]); } + /* It's valid to enable frame preemption without any kind of + * offloading being enabled, so keep it separated. + */ + if (tb[TCA_TAPRIO_ATTR_PREEMPT_QUEUES]) { + u32 preempt = nla_get_u32(tb[TCA_TAPRIO_ATTR_PREEMPT_QUEUES]); + struct tc_preempt_qopt_offload qopt = { }; + + if (preempt == U32_MAX) { + NL_SET_ERR_MSG(extack, "At least one queue must be not be preemptible"); + err = -EINVAL; + goto free_sched; + } + + qopt.preemptible_queues = preempt; + + err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_PREEMPT, + &qopt); + if (err) + goto free_sched; + + q->preemptible_queues = preempt; + } + if (FULL_OFFLOAD_IS_ENABLED(q->flags)) err = taprio_enable_offload(dev, q, new_admin, extack); else @@ -1650,6 +1678,7 @@ static int taprio_init(struct Qdisc *sch, struct nlattr *opt, */ q->clockid = -1; q->flags = TAPRIO_FLAGS_INVALID; + q->preemptible_queues = U32_MAX; spin_lock(&taprio_list_lock); list_add(&q->taprio_list, &taprio_list); @@ -1833,6 +1862,10 @@ static int taprio_dump(struct Qdisc *sch, struct sk_buff *skb) if (q->flags && nla_put_u32(skb, TCA_TAPRIO_ATTR_FLAGS, q->flags)) goto options_error; + if (q->preemptible_queues != U32_MAX && + nla_put_u32(skb, TCA_TAPRIO_ATTR_PREEMPT_QUEUES, q->preemptible_queues)) + goto options_error; + if (q->txtime_delay && nla_put_u32(skb, TCA_TAPRIO_ATTR_TXTIME_DELAY, q->txtime_delay)) goto options_error; From patchwork Wed Dec 2 04:53:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinicius Costa Gomes X-Patchwork-Id: 11944719 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 500BAC64E7C for ; Wed, 2 Dec 2020 04:55:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF73422203 for ; 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01 Dec 2020 20:53:48 -0800 From: Vinicius Costa Gomes To: netdev@vger.kernel.org Cc: Vinicius Costa Gomes , jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, kuba@kernel.org, m-karicheri2@ti.com, vladimir.oltean@nxp.com, Jose.Abreu@synopsys.com, po.liu@nxp.com, intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com Subject: [PATCH net-next v1 3/9] igc: Set the RX packet buffer size for TSN mode Date: Tue, 1 Dec 2020 20:53:19 -0800 Message-Id: <20201202045325.3254757-4-vinicius.gomes@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201202045325.3254757-1-vinicius.gomes@intel.com> References: <20201202045325.3254757-1-vinicius.gomes@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org In preparation for supporting frame preemption, when entering TSN mode set the receive packet buffer to 16KB for the Express MAC, 16KB for the Preemptible MAC and 2KB for the BMC, according to the datasheet section 7.1.3.2. Signed-off-by: Vinicius Costa Gomes --- drivers/net/ethernet/intel/igc/igc_defines.h | 2 ++ drivers/net/ethernet/intel/igc/igc_tsn.c | 14 ++++++++++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h index 32f5fd684139..0e78abfd99ee 100644 --- a/drivers/net/ethernet/intel/igc/igc_defines.h +++ b/drivers/net/ethernet/intel/igc/igc_defines.h @@ -351,6 +351,8 @@ #define IGC_RXPBS_CFG_TS_EN 0x80000000 /* Timestamp in Rx buffer */ #define IGC_TXPBSIZE_TSN 0x04145145 /* 5k bytes buffer for each queue */ +#define IGC_RXPBSIZE_TSN 0x00010090 /* 16KB for EXP + 16KB for BE + 2KB for BMC */ +#define IGC_RXPBSIZE_SIZE_MASK 0x0001FFFF #define IGC_DTXMXPKTSZ_TSN 0x19 /* 1600 bytes of max TX DMA packet size */ #define IGC_DTXMXPKTSZ_DEFAULT 0x98 /* 9728-byte Jumbo frames */ diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/ethernet/intel/igc/igc_tsn.c index 174103c4bea6..38451cf05ac6 100644 --- a/drivers/net/ethernet/intel/igc/igc_tsn.c +++ b/drivers/net/ethernet/intel/igc/igc_tsn.c @@ -24,7 +24,7 @@ static bool is_any_launchtime(struct igc_adapter *adapter) static int igc_tsn_disable_offload(struct igc_adapter *adapter) { struct igc_hw *hw = &adapter->hw; - u32 tqavctrl; + u32 tqavctrl, rxpbs; int i; if (!(adapter->flags & IGC_FLAG_TSN_QBV_ENABLED)) @@ -35,6 +35,11 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter) wr32(IGC_TXPBS, I225_TXPBSIZE_DEFAULT); wr32(IGC_DTXMXPKTSZ, IGC_DTXMXPKTSZ_DEFAULT); + rxpbs = rd32(IGC_RXPBS) & ~IGC_RXPBSIZE_SIZE_MASK; + rxpbs |= I225_RXPBSIZE_DEFAULT; + + wr32(IGC_RXPBS, rxpbs); + tqavctrl = rd32(IGC_TQAVCTRL); tqavctrl &= ~(IGC_TQAVCTRL_TRANSMIT_MODE_TSN | IGC_TQAVCTRL_ENHANCED_QAV); @@ -64,7 +69,7 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter) { struct igc_hw *hw = &adapter->hw; u32 tqavctrl, baset_l, baset_h; - u32 sec, nsec, cycle; + u32 sec, nsec, cycle, rxpbs; ktime_t base_time, systim; int i; @@ -79,6 +84,11 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter) wr32(IGC_TXPBS, IGC_TXPBSIZE_TSN); tqavctrl = rd32(IGC_TQAVCTRL); + rxpbs = rd32(IGC_RXPBS) & ~IGC_RXPBSIZE_SIZE_MASK; + rxpbs |= IGC_RXPBSIZE_TSN; + + wr32(IGC_RXPBS, rxpbs); + tqavctrl |= IGC_TQAVCTRL_TRANSMIT_MODE_TSN | IGC_TQAVCTRL_ENHANCED_QAV; wr32(IGC_TQAVCTRL, tqavctrl); From patchwork Wed Dec 2 04:53:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinicius Costa Gomes X-Patchwork-Id: 11944709 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4DE83C64E8A for ; Wed, 2 Dec 2020 04:55:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ECBE52222A for ; Wed, 2 Dec 2020 04:55:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728440AbgLBEzB (ORCPT ); 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01 Dec 2020 20:53:48 -0800 From: Vinicius Costa Gomes To: netdev@vger.kernel.org Cc: Vinicius Costa Gomes , jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, kuba@kernel.org, m-karicheri2@ti.com, vladimir.oltean@nxp.com, Jose.Abreu@synopsys.com, po.liu@nxp.com, intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com Subject: [PATCH net-next v1 4/9] igc: Only dump registers if configured to dump HW information Date: Tue, 1 Dec 2020 20:53:20 -0800 Message-Id: <20201202045325.3254757-5-vinicius.gomes@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201202045325.3254757-1-vinicius.gomes@intel.com> References: <20201202045325.3254757-1-vinicius.gomes@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org To avoid polluting the users logs with register dumps, only dump the adapter's registers if configured to do so. If users want to enable HW status messages they can do: $ ethtool -s IFACE msglvl hw on Signed-off-by: Vinicius Costa Gomes --- drivers/net/ethernet/intel/igc/igc_dump.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/intel/igc/igc_dump.c b/drivers/net/ethernet/intel/igc/igc_dump.c index 4b9ec7d0b727..90b754b429ff 100644 --- a/drivers/net/ethernet/intel/igc/igc_dump.c +++ b/drivers/net/ethernet/intel/igc/igc_dump.c @@ -308,6 +308,9 @@ void igc_regs_dump(struct igc_adapter *adapter) struct igc_hw *hw = &adapter->hw; struct igc_reg_info *reginfo; + if (!netif_msg_hw(adapter)) + return; + /* Print Registers */ netdev_info(adapter->netdev, "Register Dump\n"); netdev_info(adapter->netdev, "Register Name Value\n"); From patchwork Wed Dec 2 04:53:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinicius Costa Gomes X-Patchwork-Id: 11944715 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A3A7C64E8A for ; Wed, 2 Dec 2020 04:55:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 19BE922203 for ; Wed, 2 Dec 2020 04:55:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387465AbgLBEzQ (ORCPT ); Tue, 1 Dec 2020 23:55:16 -0500 Received: from mga04.intel.com ([192.55.52.120]:43298 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726151AbgLBEzQ (ORCPT ); Tue, 1 Dec 2020 23:55:16 -0500 IronPort-SDR: /qyPLDVN5XrzI3dnOw9+8F5/cUmkEDsuolrncgqNCzHe0K/yJAaH+2SSr7gGbNSjaHglwpkBsL RcY3EdKOQEkQ== X-IronPort-AV: E=McAfee;i="6000,8403,9822"; a="170387536" X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="170387536" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:49 -0800 IronPort-SDR: 0WbdXq5qnllbYBprKbbbPey2UHrxjaAE7yMXBQUiaflxM3hn7eD+J1UC0eGx4nVTWsDShXx+J4 SkeOf2hI5ROQ== X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="549888378" Received: from shivanif-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.212.152.222]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:49 -0800 From: Vinicius Costa Gomes To: netdev@vger.kernel.org Cc: Vinicius Costa Gomes , jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, kuba@kernel.org, m-karicheri2@ti.com, vladimir.oltean@nxp.com, Jose.Abreu@synopsys.com, po.liu@nxp.com, intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com Subject: [PATCH net-next v1 5/9] igc: Avoid TX Hangs because long cycles Date: Tue, 1 Dec 2020 20:53:21 -0800 Message-Id: <20201202045325.3254757-6-vinicius.gomes@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201202045325.3254757-1-vinicius.gomes@intel.com> References: <20201202045325.3254757-1-vinicius.gomes@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Avoid possible TX Hangs caused by using long Qbv cycles. In some cases, using long cycles (more than 1 second) can cause transmissions to be blocked for that time. As the TX Hang timeout is close to 1 second, we may need to reduce the cycle time to something more reasonable: the value chosen is 1ms. Signed-off-by: Vinicius Costa Gomes --- drivers/net/ethernet/intel/igc/igc_main.c | 4 ++-- drivers/net/ethernet/intel/igc/igc_tsn.c | 6 +++--- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index b673ac1199bb..3af54fd9cc0d 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -4692,12 +4692,12 @@ static int igc_save_launchtime_params(struct igc_adapter *adapter, int queue, if (adapter->base_time) return 0; - adapter->cycle_time = NSEC_PER_SEC; + adapter->cycle_time = NSEC_PER_MSEC; for (i = 0; i < adapter->num_tx_queues; i++) { ring = adapter->tx_ring[i]; ring->start_time = 0; - ring->end_time = NSEC_PER_SEC; + ring->end_time = NSEC_PER_MSEC; } return 0; diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/ethernet/intel/igc/igc_tsn.c index 38451cf05ac6..f5a5527adb21 100644 --- a/drivers/net/ethernet/intel/igc/igc_tsn.c +++ b/drivers/net/ethernet/intel/igc/igc_tsn.c @@ -54,11 +54,11 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter) wr32(IGC_TXQCTL(i), 0); wr32(IGC_STQT(i), 0); - wr32(IGC_ENDQT(i), NSEC_PER_SEC); + wr32(IGC_ENDQT(i), NSEC_PER_MSEC); } - wr32(IGC_QBVCYCLET_S, NSEC_PER_SEC); - wr32(IGC_QBVCYCLET, NSEC_PER_SEC); + wr32(IGC_QBVCYCLET_S, NSEC_PER_MSEC); + wr32(IGC_QBVCYCLET, NSEC_PER_MSEC); adapter->flags &= ~IGC_FLAG_TSN_QBV_ENABLED; From patchwork Wed Dec 2 04:53:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinicius Costa Gomes X-Patchwork-Id: 11944701 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 061C4C64E8A for ; Wed, 2 Dec 2020 04:54:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A97E22203 for ; Wed, 2 Dec 2020 04:54:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728356AbgLBEyb (ORCPT ); Tue, 1 Dec 2020 23:54:31 -0500 Received: from mga04.intel.com ([192.55.52.120]:43298 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726178AbgLBEya (ORCPT ); Tue, 1 Dec 2020 23:54:30 -0500 IronPort-SDR: iOXzMat1CnazP5g7rbO0UDVqSwRdSsb3aEH/QrYRIzHpRSUxMWtqZUFKqd3UVbmf4GQ9K5UIeH +D0yFI0o19RQ== X-IronPort-AV: E=McAfee;i="6000,8403,9822"; a="170387537" X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="170387537" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:49 -0800 IronPort-SDR: cqUaIDTnTCQtZ4uNYdkNoxo2VUGgfASFXCpkHXzzRyESEfUYv3LL01ThJeoApkTGNTvnNWx5dQ BVdtNvt2xe/g== X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="549888381" Received: from shivanif-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.212.152.222]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:49 -0800 From: Vinicius Costa Gomes To: netdev@vger.kernel.org Cc: Vinicius Costa Gomes , jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, kuba@kernel.org, m-karicheri2@ti.com, vladimir.oltean@nxp.com, Jose.Abreu@synopsys.com, po.liu@nxp.com, intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com Subject: [PATCH net-next v1 6/9] igc: Add support for tuning frame preemption via ethtool Date: Tue, 1 Dec 2020 20:53:22 -0800 Message-Id: <20201202045325.3254757-7-vinicius.gomes@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201202045325.3254757-1-vinicius.gomes@intel.com> References: <20201202045325.3254757-1-vinicius.gomes@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org The tc subsystem sets which queues are marked as preemptible, it's the role of ethtool to control more hardware specific parameters. These parameters include: - enabling the frame preemption hardware: As enabling frame preemption may have other requirements before it can be enabled, it's exposed via the ethtool API; - mininum fragment size multiplier: expressed in usually in the form of (1 + N)*64, this number indicates what's the size of the minimum fragment that can be preempted. Signed-off-by: Vinicius Costa Gomes --- drivers/net/ethernet/intel/igc/igc.h | 10 ++++ drivers/net/ethernet/intel/igc/igc_defines.h | 4 ++ drivers/net/ethernet/intel/igc/igc_ethtool.c | 55 ++++++++++++++++++++ drivers/net/ethernet/intel/igc/igc_tsn.c | 20 +++++-- 4 files changed, 86 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h index 35baae900c1f..35c2dc4ad810 100644 --- a/drivers/net/ethernet/intel/igc/igc.h +++ b/drivers/net/ethernet/intel/igc/igc.h @@ -87,6 +87,7 @@ struct igc_ring { u8 queue_index; /* logical index of the ring*/ u8 reg_idx; /* physical index of the ring */ bool launchtime_enable; /* true if LaunchTime is enabled */ + bool preemptible; /* true if not express */ u32 start_time; u32 end_time; @@ -165,6 +166,11 @@ struct igc_adapter { ktime_t base_time; ktime_t cycle_time; + bool frame_preemption_active; + /* Frame preemption minimum fragment size, this the X in + * (1 + X)*64 + 4 + */ + u8 min_frag_size_mult; /* OS defined structs */ struct pci_dev *pdev; @@ -262,6 +268,10 @@ extern char igc_driver_name[]; #define IGC_FLAG_VLAN_PROMISC BIT(15) #define IGC_FLAG_RX_LEGACY BIT(16) #define IGC_FLAG_TSN_QBV_ENABLED BIT(17) +#define IGC_FLAG_TSN_PREEMPT_ENABLED BIT(18) + +#define IGC_FLAG_TSN_ANY_ENABLED \ + (IGC_FLAG_TSN_QBV_ENABLED | IGC_FLAG_TSN_PREEMPT_ENABLED) #define IGC_FLAG_RSS_FIELD_IPV4_UDP BIT(6) #define IGC_FLAG_RSS_FIELD_IPV6_UDP BIT(7) diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h index 0e78abfd99ee..c2155d109bd6 100644 --- a/drivers/net/ethernet/intel/igc/igc_defines.h +++ b/drivers/net/ethernet/intel/igc/igc_defines.h @@ -410,10 +410,14 @@ /* Transmit Scheduling */ #define IGC_TQAVCTRL_TRANSMIT_MODE_TSN 0x00000001 #define IGC_TQAVCTRL_ENHANCED_QAV 0x00000008 +#define IGC_TQAVCTRL_PREEMPT_ENA 0x00000002 +#define IGC_TQAVCTRL_MIN_FRAG_MASK 0x0000C000 +#define IGC_TQAVCTRL_MIN_FRAG_SHIFT 14 #define IGC_TXQCTL_QUEUE_MODE_LAUNCHT 0x00000001 #define IGC_TXQCTL_STRICT_CYCLE 0x00000002 #define IGC_TXQCTL_STRICT_END 0x00000004 +#define IGC_TXQCTL_PREEMPTABLE 0x00000008 /* Receive Checksum Control */ #define IGC_RXCSUM_CRCOFL 0x00000800 /* CRC32 offload enable */ diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c b/drivers/net/ethernet/intel/igc/igc_ethtool.c index 61d331ce38cd..492c6592c150 100644 --- a/drivers/net/ethernet/intel/igc/igc_ethtool.c +++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c @@ -8,6 +8,7 @@ #include "igc.h" #include "igc_diag.h" +#include "igc_tsn.h" /* forward declaration */ struct igc_stats { @@ -1636,6 +1637,58 @@ static int igc_ethtool_set_eee(struct net_device *netdev, return 0; } +static int igc_ethtool_get_preempt(struct net_device *netdev, + struct ethtool_fp *fpcmd) +{ + struct igc_adapter *adapter = netdev_priv(netdev); + + fpcmd->enabled = adapter->frame_preemption_active; + fpcmd->min_frag_size_mult = adapter->min_frag_size_mult; + + return 0; +} + +static int igc_ethtool_set_preempt(struct net_device *netdev, + struct ethtool_fp *fpcmd) +{ + struct igc_adapter *adapter = netdev_priv(netdev); + int i; + + /* The formula is (Section 8.12.4 of the datasheet): + * MIN_FRAG_SIZE = 4 + (1 + MIN_FRAG)*64 + * MIN_FRAG is represented by two bits, so we can only have + * min_frag_size between 68 and 260. + */ + if (fpcmd->min_frag_size_mult > 3) + return -EINVAL; + + adapter->frame_preemption_active = fpcmd->enabled; + adapter->min_frag_size_mult = fpcmd->min_frag_size_mult; + + if (!adapter->frame_preemption_active) + goto done; + + /* Enabling frame preemption requires TSN mode to be enabled, + * which requires a schedule to be active. So, if there isn't + * a schedule already configured, configure a simple one, with + * all queues open, with 1ms cycle time. + */ + if (adapter->base_time) + goto done; + + adapter->cycle_time = NSEC_PER_MSEC; + + for (i = 0; i < adapter->num_tx_queues; i++) { + struct igc_ring *ring = adapter->tx_ring[i]; + + ring->start_time = 0; + ring->end_time = NSEC_PER_MSEC; + } + +done: + return igc_tsn_offload_apply(adapter); +} + static int igc_ethtool_begin(struct net_device *netdev) { struct igc_adapter *adapter = netdev_priv(netdev); @@ -1915,6 +1968,8 @@ static const struct ethtool_ops igc_ethtool_ops = { .get_ts_info = igc_ethtool_get_ts_info, .get_channels = igc_ethtool_get_channels, .set_channels = igc_ethtool_set_channels, + .get_preempt = igc_ethtool_get_preempt, + .set_preempt = igc_ethtool_set_preempt, .get_priv_flags = igc_ethtool_get_priv_flags, .set_priv_flags = igc_ethtool_set_priv_flags, .get_eee = igc_ethtool_get_eee, diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/ethernet/intel/igc/igc_tsn.c index f5a5527adb21..76272f62bb69 100644 --- a/drivers/net/ethernet/intel/igc/igc_tsn.c +++ b/drivers/net/ethernet/intel/igc/igc_tsn.c @@ -31,6 +31,7 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter) return 0; adapter->cycle_time = 0; + adapter->frame_preemption_active = false; wr32(IGC_TXPBS, I225_TXPBSIZE_DEFAULT); wr32(IGC_DTXMXPKTSZ, IGC_DTXMXPKTSZ_DEFAULT); @@ -42,7 +43,8 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter) tqavctrl = rd32(IGC_TQAVCTRL); tqavctrl &= ~(IGC_TQAVCTRL_TRANSMIT_MODE_TSN | - IGC_TQAVCTRL_ENHANCED_QAV); + IGC_TQAVCTRL_ENHANCED_QAV | IGC_TQAVCTRL_PREEMPT_ENA | + IGC_TQAVCTRL_MIN_FRAG_MASK); wr32(IGC_TQAVCTRL, tqavctrl); for (i = 0; i < adapter->num_tx_queues; i++) { @@ -51,6 +53,7 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter) ring->start_time = 0; ring->end_time = 0; ring->launchtime_enable = false; + ring->preemptible = false; wr32(IGC_TXQCTL(i), 0); wr32(IGC_STQT(i), 0); @@ -83,13 +86,20 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter) wr32(IGC_DTXMXPKTSZ, IGC_DTXMXPKTSZ_TSN); wr32(IGC_TXPBS, IGC_TXPBSIZE_TSN); - tqavctrl = rd32(IGC_TQAVCTRL); rxpbs = rd32(IGC_RXPBS) & ~IGC_RXPBSIZE_SIZE_MASK; rxpbs |= IGC_RXPBSIZE_TSN; wr32(IGC_RXPBS, rxpbs); + tqavctrl = rd32(IGC_TQAVCTRL) & + ~(IGC_TQAVCTRL_MIN_FRAG_MASK | IGC_TQAVCTRL_PREEMPT_ENA); tqavctrl |= IGC_TQAVCTRL_TRANSMIT_MODE_TSN | IGC_TQAVCTRL_ENHANCED_QAV; + + if (adapter->frame_preemption_active) + tqavctrl |= IGC_TQAVCTRL_PREEMPT_ENA; + + tqavctrl |= adapter->min_frag_size_mult << IGC_TQAVCTRL_MIN_FRAG_SHIFT; + wr32(IGC_TQAVCTRL, tqavctrl); wr32(IGC_QBVCYCLET_S, cycle); @@ -115,6 +125,9 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter) if (ring->launchtime_enable) txqctl |= IGC_TXQCTL_QUEUE_MODE_LAUNCHT; + if (ring->preemptible) + txqctl |= IGC_TXQCTL_PREEMPTABLE; + wr32(IGC_TXQCTL(i), txqctl); } @@ -142,7 +155,8 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter) int igc_tsn_offload_apply(struct igc_adapter *adapter) { - bool is_any_enabled = adapter->base_time || is_any_launchtime(adapter); + bool is_any_enabled = adapter->base_time || + is_any_launchtime(adapter) || adapter->frame_preemption_active; if (!(adapter->flags & IGC_FLAG_TSN_QBV_ENABLED) && !is_any_enabled) return 0; From patchwork Wed Dec 2 04:53:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinicius Costa Gomes X-Patchwork-Id: 11944705 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23049C64E8A for ; Wed, 2 Dec 2020 04:54:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CE3B622203 for ; Wed, 2 Dec 2020 04:54:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728414AbgLBEyq (ORCPT ); Tue, 1 Dec 2020 23:54:46 -0500 Received: from mga04.intel.com ([192.55.52.120]:43298 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726178AbgLBEyp (ORCPT ); Tue, 1 Dec 2020 23:54:45 -0500 IronPort-SDR: sQIIpAWQQiD5bFzjXTDxj1Hs9q+mRQeQRr+BevUOdgSlZCY7bKVIggTfmiPkGckpUHuT6pBcMN 7V5iPfEsFgZA== X-IronPort-AV: E=McAfee;i="6000,8403,9822"; a="170387538" X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="170387538" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:50 -0800 IronPort-SDR: Ln6q7sZ3+RO8hrMOGVLAZ+kTxtZ9ZfCzg7rdtnY/n5TTaL3XzoWhgAshjVlDRjQokPmriQi05t 6KyJUq1H2hgg== X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="549888385" Received: from shivanif-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.212.152.222]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:49 -0800 From: Vinicius Costa Gomes To: netdev@vger.kernel.org Cc: Vinicius Costa Gomes , jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, kuba@kernel.org, m-karicheri2@ti.com, vladimir.oltean@nxp.com, Jose.Abreu@synopsys.com, po.liu@nxp.com, intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com Subject: [PATCH net-next v1 7/9] igc: Add support for Frame Preemption offload Date: Tue, 1 Dec 2020 20:53:23 -0800 Message-Id: <20201202045325.3254757-8-vinicius.gomes@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201202045325.3254757-1-vinicius.gomes@intel.com> References: <20201202045325.3254757-1-vinicius.gomes@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org After the set of queues that are marked as preemptible are exposed to the driver we can configure the hardware to enable the frame preemption functionality. Signed-off-by: Vinicius Costa Gomes --- drivers/net/ethernet/intel/igc/igc_main.c | 32 +++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 3af54fd9cc0d..763f39082f91 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -4817,6 +4817,23 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter, return 0; } +static int igc_save_frame_preemption(struct igc_adapter *adapter, + struct tc_preempt_qopt_offload *qopt) +{ + u32 preempt; + int i; + + preempt = qopt->preemptible_queues; + + for (i = 0; i < adapter->num_tx_queues; i++) { + struct igc_ring *ring = adapter->tx_ring[i]; + + ring->preemptible = preempt & BIT(i); + } + + return 0; +} + static int igc_tsn_enable_qbv_scheduling(struct igc_adapter *adapter, struct tc_taprio_qopt_offload *qopt) { @@ -4833,6 +4850,18 @@ static int igc_tsn_enable_qbv_scheduling(struct igc_adapter *adapter, return igc_tsn_offload_apply(adapter); } +static int igc_tsn_enable_frame_preemption(struct igc_adapter *adapter, + struct tc_preempt_qopt_offload *qopt) +{ + int err; + + err = igc_save_frame_preemption(adapter, qopt); + if (err) + return err; + + return igc_tsn_offload_apply(adapter); +} + static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data) { @@ -4845,6 +4874,9 @@ static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type, case TC_SETUP_QDISC_ETF: return igc_tsn_enable_launchtime(adapter, type_data); + case TC_SETUP_PREEMPT: + return igc_tsn_enable_frame_preemption(adapter, type_data); + default: return -EOPNOTSUPP; } From patchwork Wed Dec 2 04:53:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinicius Costa Gomes X-Patchwork-Id: 11944711 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CAF10C64E90 for ; Wed, 2 Dec 2020 04:55:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 748462222C for ; Wed, 2 Dec 2020 04:55:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728446AbgLBEzC (ORCPT ); Tue, 1 Dec 2020 23:55:02 -0500 Received: from mga04.intel.com ([192.55.52.120]:43301 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726151AbgLBEzC (ORCPT ); Tue, 1 Dec 2020 23:55:02 -0500 IronPort-SDR: PS7X+Ea7RmHujVqB3+ZWpjBD56aTflVLRBOGgWf9nIizJKrS/Gopk+d8kAaYLmeCJayLAJD4vS lV+H0LrfE9UQ== X-IronPort-AV: E=McAfee;i="6000,8403,9822"; a="170387540" X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="170387540" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:50 -0800 IronPort-SDR: YVrnecCPQENo2hfl06eRNaVcm0cgimH/R70lhkacYkV1i8YMh8Z5KMnBXOdi9Fg6fKcm99LL0a hDVj5FO5XIFg== X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="549888388" Received: from shivanif-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.212.152.222]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:50 -0800 From: Vinicius Costa Gomes To: netdev@vger.kernel.org Cc: Vinicius Costa Gomes , jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, kuba@kernel.org, m-karicheri2@ti.com, vladimir.oltean@nxp.com, Jose.Abreu@synopsys.com, po.liu@nxp.com, intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com Subject: [PATCH net-next v1 8/9] igc: Add support for exposing frame preemption stats registers Date: Tue, 1 Dec 2020 20:53:24 -0800 Message-Id: <20201202045325.3254757-9-vinicius.gomes@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201202045325.3254757-1-vinicius.gomes@intel.com> References: <20201202045325.3254757-1-vinicius.gomes@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Expose the Frame Preemption counters, so the number of express/preemptible packets can be monitored by userspace. These registers are cleared when read, so the value shown is the number of events that happened since the last read. Signed-off-by: Vinicius Costa Gomes --- drivers/net/ethernet/intel/igc/igc_ethtool.c | 8 ++++++++ drivers/net/ethernet/intel/igc/igc_regs.h | 10 ++++++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c b/drivers/net/ethernet/intel/igc/igc_ethtool.c index 492c6592c150..14a14a61de45 100644 --- a/drivers/net/ethernet/intel/igc/igc_ethtool.c +++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c @@ -325,6 +325,14 @@ static void igc_ethtool_get_regs(struct net_device *netdev, regs_buff[213] = adapter->stats.tlpic; regs_buff[214] = adapter->stats.rlpic; + regs_buff[215] = rd32(IGC_PRMPTDTCNT); + regs_buff[216] = rd32(IGC_PRMEVNTTCNT); + regs_buff[217] = rd32(IGC_PRMPTDRCNT); + regs_buff[218] = rd32(IGC_PRMEVNTRCNT); + regs_buff[219] = rd32(IGC_PRMPBLTCNT); + regs_buff[220] = rd32(IGC_PRMPBLRCNT); + regs_buff[221] = rd32(IGC_PRMEXPTCNT); + regs_buff[222] = rd32(IGC_PRMEXPRCNT); } static void igc_ethtool_get_wol(struct net_device *netdev, diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h index b52dd9d737e8..69e295d69d84 100644 --- a/drivers/net/ethernet/intel/igc/igc_regs.h +++ b/drivers/net/ethernet/intel/igc/igc_regs.h @@ -197,6 +197,16 @@ #define IGC_FTQF(_n) (0x059E0 + (4 * (_n))) /* 5-tuple Queue Fltr */ +/* Time sync registers - preemption statistics */ +#define IGC_PRMPTDTCNT 0x04280 /* Good TX Preempted Packets */ +#define IGC_PRMEVNTTCNT 0x04298 /* TX Preemption event counter */ +#define IGC_PRMPTDRCNT 0x04284 /* Good RX Preempted Packets */ +#define IGC_PRMEVNTRCNT 0x0429C /* RX Preemption event counter */ +#define IGC_PRMPBLTCNT 0x04288 /* Good TX Preemptable Packets */ +#define IGC_PRMPBLRCNT 0x0428C /* Good RX Preemptable Packets */ +#define IGC_PRMEXPTCNT 0x04290 /* Good TX Express Packets */ +#define IGC_PRMEXPRCNT 0x042A0 /* Preemption Exception Counter */ + /* Transmit Scheduling Registers */ #define IGC_TQAVCTRL 0x3570 #define IGC_TXQCTL(_n) (0x3344 + 0x4 * (_n)) From patchwork Wed Dec 2 04:53:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinicius Costa Gomes X-Patchwork-Id: 11944713 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1E77C64E7C for ; Wed, 2 Dec 2020 04:55:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 69FEC22203 for ; Wed, 2 Dec 2020 04:55:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387448AbgLBEzL (ORCPT ); Tue, 1 Dec 2020 23:55:11 -0500 Received: from mga04.intel.com ([192.55.52.120]:43354 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726151AbgLBEzL (ORCPT ); Tue, 1 Dec 2020 23:55:11 -0500 IronPort-SDR: DTo1w9M8BJbaNbKqgD+FqMufj7OiiwS6hl1rGM2z9StfnOwe4oIZ1W2NcN3StRMDbC8pjwpZYl qqP6BaeaVtKA== X-IronPort-AV: E=McAfee;i="6000,8403,9822"; a="170387541" X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="170387541" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:50 -0800 IronPort-SDR: rYUp127OH8oYvnRV0YdH6/h1SyukH2t94dtaN7SS2+Ixo1rftRlp2fYhiHga7bHczd9e3Xsbun QOwucY+P+STg== X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="549888392" Received: from shivanif-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.212.152.222]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 20:53:50 -0800 From: Vinicius Costa Gomes To: netdev@vger.kernel.org Cc: Vinicius Costa Gomes , jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, kuba@kernel.org, m-karicheri2@ti.com, vladimir.oltean@nxp.com, Jose.Abreu@synopsys.com, po.liu@nxp.com, intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com Subject: [PATCH net-next v1 9/9] igc: Separate TSN configurations that can be updated Date: Tue, 1 Dec 2020 20:53:25 -0800 Message-Id: <20201202045325.3254757-10-vinicius.gomes@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201202045325.3254757-1-vinicius.gomes@intel.com> References: <20201202045325.3254757-1-vinicius.gomes@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Some TSN features can be enabled during runtime, but most of the features need an adapter reset to be disabled. To better keep track of this, separate the process into an "_apply" and a "reset" functions, "_apply" will run with the adapter in potencially "dirty" state, and if necessary will request an adapter reset, so "_reset" always run with a "clean" adapter. The idea is to make the process easier to follow. Signed-off-by: Vinicius Costa Gomes --- drivers/net/ethernet/intel/igc/igc_main.c | 21 ++-- drivers/net/ethernet/intel/igc/igc_tsn.c | 140 +++++++++++++++------- drivers/net/ethernet/intel/igc/igc_tsn.h | 1 + 3 files changed, 103 insertions(+), 59 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 763f39082f91..76999fe05926 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -107,7 +107,7 @@ void igc_reset(struct igc_adapter *adapter) igc_ptp_reset(adapter); /* Re-enable TSN offloading, where applicable. */ - igc_tsn_offload_apply(adapter); + igc_tsn_reset(adapter); igc_get_phy_info(hw); } @@ -4823,6 +4823,11 @@ static int igc_save_frame_preemption(struct igc_adapter *adapter, u32 preempt; int i; + /* What we want here is just to save the configuration, so + * when frame preemption is enabled via ethtool, which queues + * are marked as preemptible is saved. + */ + preempt = qopt->preemptible_queues; for (i = 0; i < adapter->num_tx_queues; i++) { @@ -4850,18 +4855,6 @@ static int igc_tsn_enable_qbv_scheduling(struct igc_adapter *adapter, return igc_tsn_offload_apply(adapter); } -static int igc_tsn_enable_frame_preemption(struct igc_adapter *adapter, - struct tc_preempt_qopt_offload *qopt) -{ - int err; - - err = igc_save_frame_preemption(adapter, qopt); - if (err) - return err; - - return igc_tsn_offload_apply(adapter); -} - static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data) { @@ -4875,7 +4868,7 @@ static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type, return igc_tsn_enable_launchtime(adapter, type_data); case TC_SETUP_PREEMPT: - return igc_tsn_enable_frame_preemption(adapter, type_data); + return igc_save_frame_preemption(adapter, type_data); default: return -EOPNOTSUPP; diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/ethernet/intel/igc/igc_tsn.c index 76272f62bb69..caf8510ad6be 100644 --- a/drivers/net/ethernet/intel/igc/igc_tsn.c +++ b/drivers/net/ethernet/intel/igc/igc_tsn.c @@ -18,8 +18,24 @@ static bool is_any_launchtime(struct igc_adapter *adapter) return false; } +static unsigned int igc_tsn_new_flags(struct igc_adapter *adapter) +{ + unsigned int new_flags = adapter->flags & ~IGC_FLAG_TSN_ANY_ENABLED; + + if (adapter->base_time) + new_flags |= IGC_FLAG_TSN_QBV_ENABLED; + + if (is_any_launchtime(adapter)) + new_flags |= IGC_FLAG_TSN_QBV_ENABLED; + + if (adapter->frame_preemption_active) + new_flags |= IGC_FLAG_TSN_PREEMPT_ENABLED; + + return new_flags; +} + /* Returns the TSN specific registers to their default values after - * TSN offloading is disabled. + * the adapter is reset. */ static int igc_tsn_disable_offload(struct igc_adapter *adapter) { @@ -27,11 +43,9 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter) u32 tqavctrl, rxpbs; int i; - if (!(adapter->flags & IGC_FLAG_TSN_QBV_ENABLED)) - return 0; - adapter->cycle_time = 0; adapter->frame_preemption_active = false; + adapter->base_time = 0; wr32(IGC_TXPBS, I225_TXPBSIZE_DEFAULT); wr32(IGC_DTXMXPKTSZ, IGC_DTXMXPKTSZ_DEFAULT); @@ -63,37 +77,24 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter) wr32(IGC_QBVCYCLET_S, NSEC_PER_MSEC); wr32(IGC_QBVCYCLET, NSEC_PER_MSEC); - adapter->flags &= ~IGC_FLAG_TSN_QBV_ENABLED; + adapter->flags &= ~IGC_FLAG_TSN_ANY_ENABLED; return 0; } -static int igc_tsn_enable_offload(struct igc_adapter *adapter) +static int igc_tsn_update_params(struct igc_adapter *adapter) { struct igc_hw *hw = &adapter->hw; - u32 tqavctrl, baset_l, baset_h; - u32 sec, nsec, cycle, rxpbs; - ktime_t base_time, systim; + u32 tqavctrl; + unsigned int flags; int i; - if (adapter->flags & IGC_FLAG_TSN_QBV_ENABLED) + flags = igc_tsn_new_flags(adapter) & IGC_FLAG_TSN_ANY_ENABLED; + if (!flags) return 0; - cycle = adapter->cycle_time; - base_time = adapter->base_time; - - wr32(IGC_TSAUXC, 0); - wr32(IGC_DTXMXPKTSZ, IGC_DTXMXPKTSZ_TSN); - wr32(IGC_TXPBS, IGC_TXPBSIZE_TSN); - - rxpbs = rd32(IGC_RXPBS) & ~IGC_RXPBSIZE_SIZE_MASK; - rxpbs |= IGC_RXPBSIZE_TSN; - - wr32(IGC_RXPBS, rxpbs); - tqavctrl = rd32(IGC_TQAVCTRL) & ~(IGC_TQAVCTRL_MIN_FRAG_MASK | IGC_TQAVCTRL_PREEMPT_ENA); - tqavctrl |= IGC_TQAVCTRL_TRANSMIT_MODE_TSN | IGC_TQAVCTRL_ENHANCED_QAV; if (adapter->frame_preemption_active) tqavctrl |= IGC_TQAVCTRL_PREEMPT_ENA; @@ -102,9 +103,6 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter) wr32(IGC_TQAVCTRL, tqavctrl); - wr32(IGC_QBVCYCLET_S, cycle); - wr32(IGC_QBVCYCLET, cycle); - for (i = 0; i < adapter->num_tx_queues; i++) { struct igc_ring *ring = adapter->tx_ring[i]; u32 txqctl = 0; @@ -125,12 +123,47 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter) if (ring->launchtime_enable) txqctl |= IGC_TXQCTL_QUEUE_MODE_LAUNCHT; - if (ring->preemptible) + if (adapter->frame_preemption_active && ring->preemptible) txqctl |= IGC_TXQCTL_PREEMPTABLE; wr32(IGC_TXQCTL(i), txqctl); } + adapter->flags = igc_tsn_new_flags(adapter); + + return 0; +} + +static int igc_tsn_enable_offload(struct igc_adapter *adapter) +{ + struct igc_hw *hw = &adapter->hw; + u32 baset_l, baset_h, tqavctrl; + u32 sec, nsec, cycle, rxpbs; + ktime_t base_time, systim; + + tqavctrl = rd32(IGC_TQAVCTRL); + tqavctrl |= IGC_TQAVCTRL_TRANSMIT_MODE_TSN | IGC_TQAVCTRL_ENHANCED_QAV; + + wr32(IGC_TQAVCTRL, tqavctrl); + + wr32(IGC_TSAUXC, 0); + wr32(IGC_DTXMXPKTSZ, IGC_DTXMXPKTSZ_TSN); + wr32(IGC_TXPBS, IGC_TXPBSIZE_TSN); + + rxpbs = rd32(IGC_RXPBS) & ~IGC_RXPBSIZE_SIZE_MASK; + rxpbs |= IGC_RXPBSIZE_TSN; + + wr32(IGC_RXPBS, rxpbs); + + if (!adapter->base_time) + goto done; + + cycle = adapter->cycle_time; + base_time = adapter->base_time; + + wr32(IGC_QBVCYCLET_S, cycle); + wr32(IGC_QBVCYCLET, cycle); + nsec = rd32(IGC_SYSTIML); sec = rd32(IGC_SYSTIMH); @@ -148,34 +181,51 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter) wr32(IGC_BASET_H, baset_h); wr32(IGC_BASET_L, baset_l); - adapter->flags |= IGC_FLAG_TSN_QBV_ENABLED; +done: + igc_tsn_update_params(adapter); return 0; } +int igc_tsn_reset(struct igc_adapter *adapter) +{ + unsigned int new_flags; + int err = 0; + + new_flags = igc_tsn_new_flags(adapter); + + if (!(new_flags & IGC_FLAG_TSN_ANY_ENABLED)) + return igc_tsn_disable_offload(adapter); + + err = igc_tsn_enable_offload(adapter); + if (err < 0) + return err; + + adapter->flags = new_flags; + + return err; +} + int igc_tsn_offload_apply(struct igc_adapter *adapter) { - bool is_any_enabled = adapter->base_time || - is_any_launchtime(adapter) || adapter->frame_preemption_active; + unsigned int new_flags, old_flags; - if (!(adapter->flags & IGC_FLAG_TSN_QBV_ENABLED) && !is_any_enabled) - return 0; + old_flags = adapter->flags; + new_flags = igc_tsn_new_flags(adapter); - if (!is_any_enabled) { - int err = igc_tsn_disable_offload(adapter); + if (old_flags == new_flags) + return igc_tsn_update_params(adapter); - if (err < 0) - return err; + /* Enabling features work without resetting the adapter */ + if (new_flags > old_flags) + return igc_tsn_enable_offload(adapter); - /* The BASET registers aren't cleared when writing - * into them, force a reset if the interface is - * running. - */ - if (netif_running(adapter->netdev)) - schedule_work(&adapter->reset_task); + adapter->flags = new_flags; - return 0; - } + if (!netif_running(adapter->netdev)) + return igc_tsn_enable_offload(adapter); - return igc_tsn_enable_offload(adapter); + schedule_work(&adapter->reset_task); + + return 0; } diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.h b/drivers/net/ethernet/intel/igc/igc_tsn.h index f76bc86ddccd..1512307f5a52 100644 --- a/drivers/net/ethernet/intel/igc/igc_tsn.h +++ b/drivers/net/ethernet/intel/igc/igc_tsn.h @@ -5,5 +5,6 @@ #define _IGC_TSN_H_ int igc_tsn_offload_apply(struct igc_adapter *adapter); +int igc_tsn_reset(struct igc_adapter *adapter); #endif /* _IGC_BASE_H */