From patchwork Tue Oct 22 08:57:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhi Chen X-Patchwork-Id: 11204029 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D3196139A for ; Tue, 22 Oct 2019 08:57:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AFD5E20679 for ; Tue, 22 Oct 2019 08:57:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="U4wDhOa2"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="hvWS21Ah" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731299AbfJVI5o (ORCPT ); Tue, 22 Oct 2019 04:57:44 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:36340 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731223AbfJVI5n (ORCPT ); Tue, 22 Oct 2019 04:57:43 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 3D93C6081C; Tue, 22 Oct 2019 08:57:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1571734663; bh=P1gtfMzQ64P1I8hkPS69QXlX/oj3QD3ocmBAXcTD/gw=; h=From:To:Cc:Subject:Date:From; b=U4wDhOa2jowfb4Gyg7jq5c+VsZLcbdamql8N6rT/gTEFxbtQzO7ni0cnQrx1z35eP yiNbAEgMJpBXhomIwGD9Xrcxs1Hn0nqyzVcbna8BVyRAPvmAVc2ROgjLO09Kq9AOoH Wve195Bseh3x7GCe04zbdny3xHDVndhNUtS22PQY= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_INVALID,DKIM_SIGNED,SPF_NONE autolearn=no autolearn_force=no version=3.4.0 Received: from zhichen.ap.qualcomm.com (unknown [180.166.53.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: zhichen@codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id F0ACA60159; Tue, 22 Oct 2019 08:57:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1571734662; bh=P1gtfMzQ64P1I8hkPS69QXlX/oj3QD3ocmBAXcTD/gw=; h=From:To:Cc:Subject:Date:From; b=hvWS21AhsOHa0S0NnNO8mHlDU1gISUSMra4JdrrOJq+hWXMyTAPIgWmtLOGIEbBIO TyuMqiB4k5JndsiS/O+izJ/XmdbzFW7eIUlGef4swAqPz2tAqQ+ZYAc9/wfu5jo8Y0 2kQtzjOq7Sn6Y6Ou+oE/6d1oImxnLYsu3scH9LKs= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org F0ACA60159 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=zhichen@codeaurora.org From: Zhi Chen To: ath10k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, Zhi Chen Subject: [PATCH RFC] Revert "ath10k: fix DMA related firmware crashes on multiple devices" Date: Tue, 22 Oct 2019 16:57:09 +0800 Message-Id: <1571734629-18028-1-git-send-email-zhichen@codeaurora.org> X-Mailer: git-send-email 2.7.4 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org This reverts commit 76d164f582150fd0259ec0fcbc485470bcd8033e. PCIe hung issue was observed on multiple platforms. The issue was reproduced when DUT was configured as AP and associated with 50+ STAs. With PCIe protocol analyzer, we can see DMA Read crossing 4KB boundary when issue happened. It broke PCIe spec and caused PCIe stuck. Tested: IPQ8064 + QCA9984 with firmware 10.4-3.10-00047 QCS404 + QCA9984 with firmware 10.4-3.9.0.2--00044 Synaptics AS370 + QCA9888 with firmware 10.4-3.9.0.2--00040 Signed-off-by: Zhi Chen --- drivers/net/wireless/ath/ath10k/hw.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h index 35a3623..17f620b 100644 --- a/drivers/net/wireless/ath/ath10k/hw.h +++ b/drivers/net/wireless/ath/ath10k/hw.h @@ -753,7 +753,7 @@ ath10k_is_rssi_enable(struct ath10k_hw_params *hw, #define TARGET_10X_MAX_FRAG_ENTRIES 0 /* 10.2 parameters */ -#define TARGET_10_2_DMA_BURST_SIZE 0 +#define TARGET_10_2_DMA_BURST_SIZE 1 /* Target specific defines for WMI-TLV firmware */ #define TARGET_TLV_NUM_VDEVS 4 @@ -813,7 +813,7 @@ ath10k_is_rssi_enable(struct ath10k_hw_params *hw, #define TARGET_10_4_TX_DBG_LOG_SIZE 1024 #define TARGET_10_4_NUM_WDS_ENTRIES 32 -#define TARGET_10_4_DMA_BURST_SIZE 0 +#define TARGET_10_4_DMA_BURST_SIZE 1 #define TARGET_10_4_MAC_AGGR_DELIM 0 #define TARGET_10_4_RX_SKIP_DEFRAG_TIMEOUT_DUP_DETECTION_CHECK 1 #define TARGET_10_4_VOW_CONFIG 0