From patchwork Wed Nov 24 12:47:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabio Estevam X-Patchwork-Id: 517888 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D0BAC4332F for ; Wed, 24 Nov 2021 12:51:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343943AbhKXMy0 (ORCPT ); Wed, 24 Nov 2021 07:54:26 -0500 Received: from phobos.denx.de ([85.214.62.61]:55152 "EHLO phobos.denx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346444AbhKXMvJ (ORCPT ); Wed, 24 Nov 2021 07:51:09 -0500 Received: from localhost.localdomain (unknown [IPv6:2804:14c:485:504a:e573:ff9b:725:6f6b]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: festevam@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 3E4BE82FAA; Wed, 24 Nov 2021 13:47:55 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1637758078; bh=BdPos8WDeSvVOZsK9LobRAxqOwILtet/IHWUeDZvIRs=; h=From:To:Cc:Subject:Date:From; b=UF3+pafMrx6baaFbAEj/q03TGFKcDQJTXX5rNIXpNbLjB1W8tsUZy6pqQPNF9dqJQ CjtiDOtH7Ntj3qWooHaHZi8LHrlEvV5ph9pZQtdfSzqOzc5eD7NAonoUz4e09lRic7 LWyzB532U9iC0b9ptYsKhlj8x7Jp6J0PydD4WDPvsBdsjdZ9wj9tpQJazoKmaZ/SJu g4fveRoDjXQnQXvJxoTkDi+zL4K5O1i/ZFgXkRkhDMAtgzgB+G6yPI80QatH8CVHC2 p25cup3uXtnTy0VtV0iTERDeFR1SbPn0u+sNMRa3mXWlJLYunXqUeaLoQTDeiGbZ8j QEWca5W9pKEhQ== From: Fabio Estevam To: kvalo@codeaurora.org Cc: ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, wgong@codeaurora.org, Fabio Estevam Subject: [PATCH v2] ath10k: Fix the MTU size on QCA9377 SDIO Date: Wed, 24 Nov 2021 09:47:43 -0300 Message-Id: <20211124124743.704336-1-festevam@denx.de> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.103.2 at phobos.denx.de X-Virus-Status: Clean Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org On an imx6dl-pico-pi board with a QCA9377 SDIO chip, simply trying to connect via ssh to another machine causes: [ 55.824159] ath10k_sdio mmc1:0001:1: failed to transmit packet, dropping: -12 [ 55.832169] ath10k_sdio mmc1:0001:1: failed to submit frame: -12 [ 55.838529] ath10k_sdio mmc1:0001:1: failed to push frame: -12 [ 55.905863] ath10k_sdio mmc1:0001:1: failed to transmit packet, dropping: -12 [ 55.913650] ath10k_sdio mmc1:0001:1: failed to submit frame: -12 [ 55.919887] ath10k_sdio mmc1:0001:1: failed to push frame: -12 , leading to an ssh connection failure. One user inspected the size of frames on Wireshark and reported the followig: "I was able to narrow the issue down to the mtu. If I set the mtu for the wlan0 device to 1486 instead of 1500, the issue does not happen. The size of frames that I see on Wireshark is exactly 1500 after setting it to 1486." Clearing the HI_ACS_FLAGS_ALT_DATA_CREDIT_SIZE avoids the problem and the ssh command works successfully after that. Introduce a 'credit_size_workaround' field to ath10k_hw_params for the QCA9377 SDIO, so that the HI_ACS_FLAGS_ALT_DATA_CREDIT_SIZE is not set in this case. Tested with QCA9377 SDIO with firmware WLAN.TF.1.1.1-00061-QCATFSWPZ-1. Fixes: 2f918ea98606 ("ath10k: enable alt data of TX path for sdio") Signed-off-by: Fabio Estevam --- Changes since v1: - Restrict the workaround only for QCA9377 SDIO drivers/net/wireless/ath/ath10k/core.c | 3 ++- drivers/net/wireless/ath/ath10k/hw.h | 3 +++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c index 72a366aa9f60..5a936e643d7a 100644 --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -715,6 +715,7 @@ static void ath10k_send_suspend_complete(struct ath10k *ar) static int ath10k_init_sdio(struct ath10k *ar, enum ath10k_firmware_mode mode) { + bool mtu_workaround = ar->hw_params.credit_size_workaround; int ret; u32 param = 0; @@ -732,7 +733,7 @@ static int ath10k_init_sdio(struct ath10k *ar, enum ath10k_firmware_mode mode) param |= HI_ACS_FLAGS_SDIO_REDUCE_TX_COMPL_SET; - if (mode == ATH10K_FIRMWARE_MODE_NORMAL) + if (mode == ATH10K_FIRMWARE_MODE_NORMAL && !mtu_workaround) param |= HI_ACS_FLAGS_ALT_DATA_CREDIT_SIZE; else param &= ~HI_ACS_FLAGS_ALT_DATA_CREDIT_SIZE; diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h index 6b03c7787e36..591ef7416b61 100644 --- a/drivers/net/wireless/ath/ath10k/hw.h +++ b/drivers/net/wireless/ath/ath10k/hw.h @@ -618,6 +618,9 @@ struct ath10k_hw_params { */ bool uart_pin_workaround; + /* Workaround for the credit size calculation */ + bool credit_size_workaround; + /* tx stats support over pktlog */ bool tx_stats_over_pktlog;