From patchwork Wed Jun 14 14:07:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Kauer X-Patchwork-Id: 13280105 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 8B1CEDF4E for ; Wed, 14 Jun 2023 14:07:34 +0000 (UTC) Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5E5EECD; Wed, 14 Jun 2023 07:07:33 -0700 (PDT) From: Florian Kauer DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1686751651; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=x6Htu7np35GOzuU2rwqMOLnSJ2z47YfJkRbHy1TCsl0=; b=1+8JZxple640L2i78OWj0AT4lW7BSRG5mTek6g1HCJErHIPJWpbpZbA8770+hU+H+m0tNb c9BnZ8Psh4CSh/9fzNZmdOxxeQ2hs3QOXMSxanhaAq7kgy8pyfqTNpd9Pkk8zVadW2EqGg EHQnvyIaPn/G1d5Uws7atr6Ma3KiSfbQ8PQ6+j/C7XxECFdHZtDqNkZ7XoW90Oy36m5gGm NDleKInVyFDzlbfFnAK6BXpJrUyKA/ggBwhnEwJbDOWCVgZ5XKbGumlrZckJHJ+B59NqtC vykd4w1CGkQtniToM4Nce/jXtkl0xIgA8tz4o8zkfydewwK0vEH42Qg5/ID54w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1686751651; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=x6Htu7np35GOzuU2rwqMOLnSJ2z47YfJkRbHy1TCsl0=; b=slM6BJwhD6d50c957awDJHQXUZNZ9MEQweTUaWR3uNdodBTiBsjm6mW1Cvxg+B6E0s8OkD 9nYgz1dY/rUvzFBg== To: Jesse Brandeburg , Tony Nguyen , Vinicius Costa Gomes , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Tan Tee Min , Muhammad Husaini Zulkifli , Aravindhan Gunasekaran , Malli C Cc: intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kurt@linutronix.de, florian.kauer@linutronix.de Subject: [PATCH net-next 3/6] igc: Handle already enabled taprio offload for basetime 0 Date: Wed, 14 Jun 2023 16:07:11 +0200 Message-Id: <20230614140714.14443-4-florian.kauer@linutronix.de> In-Reply-To: <20230614140714.14443-1-florian.kauer@linutronix.de> References: <20230614140714.14443-1-florian.kauer@linutronix.de> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org Since commit e17090eb2494 ("igc: allow BaseTime 0 enrollment for Qbv") it is possible to enable taprio offload with a basetime of 0. However, the check if taprio offload is already enabled (and thus -EALREADY should be returned for igc_save_qbv_schedule) still relied on adapter->base_time > 0. This can be reproduced as follows: # TAPRIO offload (flags == 0x2) and base-time = 0 sudo tc qdisc replace dev enp1s0 parent root handle 100 stab overhead 24 taprio \ num_tc 1 \ map 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \ queues 1@0 \ base-time 0 \ sched-entry S 01 300000 \ flags 0x2 # The second call should fail with "Error: Device failed to setup taprio offload." # But that only happens if base-time was != 0 sudo tc qdisc replace dev enp1s0 parent root handle 100 stab overhead 24 taprio \ num_tc 1 \ map 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \ queues 1@0 \ base-time 0 \ sched-entry S 01 300000 \ flags 0x2 Fixes: e17090eb2494 ("igc: allow BaseTime 0 enrollment for Qbv") Signed-off-by: Florian Kauer Reviewed-by: Kurt Kanzenbach --- drivers/net/ethernet/intel/igc/igc_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 122158b321d5..35ace8d338a5 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -6123,7 +6123,7 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter, if (qopt->base_time < 0) return -ERANGE; - if (igc_is_device_id_i225(hw) && adapter->base_time) + if (igc_is_device_id_i225(hw) && adapter->taprio_offload_enable) return -EALREADY; if (!validate_schedule(adapter, qopt))