From patchwork Fri Aug 27 17:25:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Nguyen X-Patchwork-Id: 503660 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 06BFBC25AEC for ; Fri, 27 Aug 2021 17:22:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E1D1060E0B for ; Fri, 27 Aug 2021 17:21:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245588AbhH0RWq (ORCPT ); Fri, 27 Aug 2021 13:22:46 -0400 Received: from mga11.intel.com ([192.55.52.93]:33004 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240442AbhH0RW0 (ORCPT ); Fri, 27 Aug 2021 13:22:26 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10089"; a="214870014" X-IronPort-AV: E=Sophos;i="5.84,357,1620716400"; d="scan'208";a="214870014" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Aug 2021 10:21:31 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,357,1620716400"; d="scan'208";a="427178970" Received: from anguy11-desk2.jf.intel.com ([10.166.244.147]) by orsmga003.jf.intel.com with ESMTP; 27 Aug 2021 10:21:30 -0700 From: Tony Nguyen To: davem@davemloft.net, kuba@kernel.org Cc: Vinicius Costa Gomes , netdev@vger.kernel.org, anthony.l.nguyen@intel.com, sasha.neftin@intel.com, vitaly.lifshits@intel.com, Aravindhan Gunasekaran , Mallikarjuna Chilakala , Dvora Fuxbrumer Subject: [PATCH net-next 2/3] igc: Simplify TSN flags handling Date: Fri, 27 Aug 2021 10:25:12 -0700 Message-Id: <20210827172513.224045-3-anthony.l.nguyen@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210827172513.224045-1-anthony.l.nguyen@intel.com> References: <20210827172513.224045-1-anthony.l.nguyen@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Vinicius Costa Gomes Separates the procedure done during reset from applying a configuration, knowing when the code is executing allow us to separate the better what changes the hardware state from what changes only the driver state. Introduces a flag for bookkeeping the driver state of TSN features. When Qav and frame-preemption is also implemented this flag makes it easier to keep track on whether a TSN feature driver state is enabled or not though controller state changes, say, during a reset. Signed-off-by: Vinicius Costa Gomes Signed-off-by: Aravindhan Gunasekaran Signed-off-by: Mallikarjuna Chilakala Tested-by: Dvora Fuxbrumer Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/igc/igc.h | 2 + drivers/net/ethernet/intel/igc/igc_main.c | 2 +- drivers/net/ethernet/intel/igc/igc_tsn.c | 65 ++++++++++++++--------- drivers/net/ethernet/intel/igc/igc_tsn.h | 1 + 4 files changed, 43 insertions(+), 27 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h index 2d17a6da63cf..b561beb1e623 100644 --- a/drivers/net/ethernet/intel/igc/igc.h +++ b/drivers/net/ethernet/intel/igc/igc.h @@ -291,6 +291,8 @@ extern char igc_driver_name[]; #define IGC_FLAG_RX_LEGACY BIT(16) #define IGC_FLAG_TSN_QBV_ENABLED BIT(17) +#define IGC_FLAG_TSN_ANY_ENABLED IGC_FLAG_TSN_QBV_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_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 411d6caa27b5..2e5c9b5a57d1 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -120,7 +120,7 @@ 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); } diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/ethernet/intel/igc/igc_tsn.c index 5bcdf7583505..2935d57c593d 100644 --- a/drivers/net/ethernet/intel/igc/igc_tsn.c +++ b/drivers/net/ethernet/intel/igc/igc_tsn.c @@ -18,8 +18,21 @@ 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; + + 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 +40,6 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter) u32 tqavctrl; int i; - if (!(adapter->flags & IGC_FLAG_TSN_QBV_ENABLED)) - return 0; - - adapter->cycle_time = 0; - wr32(IGC_TXPBS, I225_TXPBSIZE_DEFAULT); wr32(IGC_DTXMXPKTSZ, IGC_DTXMXPKTSZ_DEFAULT); @@ -62,9 +70,6 @@ static int igc_tsn_enable_offload(struct igc_adapter *adapter) ktime_t base_time, systim; int i; - if (adapter->flags & IGC_FLAG_TSN_QBV_ENABLED) - return 0; - cycle = adapter->cycle_time; base_time = adapter->base_time; @@ -119,33 +124,41 @@ 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; - return 0; } -int igc_tsn_offload_apply(struct igc_adapter *adapter) +int igc_tsn_reset(struct igc_adapter *adapter) { - bool is_any_enabled = adapter->base_time || is_any_launchtime(adapter); + unsigned int new_flags; + int err = 0; - if (!(adapter->flags & IGC_FLAG_TSN_QBV_ENABLED) && !is_any_enabled) - return 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; - if (!is_any_enabled) { - int err = igc_tsn_disable_offload(adapter); + adapter->flags = new_flags; - if (err < 0) - return err; + return err; +} - /* 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); +int igc_tsn_offload_apply(struct igc_adapter *adapter) +{ + int err; + if (netif_running(adapter->netdev)) { + schedule_work(&adapter->reset_task); return 0; } - return igc_tsn_enable_offload(adapter); + err = igc_tsn_enable_offload(adapter); + if (err < 0) + return err; + + adapter->flags = igc_tsn_new_flags(adapter); + 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 */