From patchwork Mon May 4 23:37:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Elder X-Patchwork-Id: 1283130 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=yODIs6sx; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49GK5p3dr9z9sSs for ; Tue, 5 May 2020 09:37:34 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728419AbgEDXhd (ORCPT ); Mon, 4 May 2020 19:37:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728192AbgEDXhZ (ORCPT ); Mon, 4 May 2020 19:37:25 -0400 Received: from mail-qt1-x841.google.com (mail-qt1-x841.google.com [IPv6:2607:f8b0:4864:20::841]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1FE9C061A0E for ; Mon, 4 May 2020 16:37:23 -0700 (PDT) Received: by mail-qt1-x841.google.com with SMTP id j2so253080qtr.12 for ; Mon, 04 May 2020 16:37:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Sp4luMaF6IKbI/3fhMGnaHSP2UluU8wsl5sO/u1BVg8=; b=yODIs6sx85nyS1LAB3htJ85KxKopBPuE4uu/Ga7AS7Zu7KTuBIXYqhwu+/wPz2gC82 OIXJBsmQSRKc0G7LJCCCMKUqfQt3DZchu6NOJATTBVVOuDlWzdNsop76Pjqm6EHRm/uV MiUUEGlBieUZLJyBDh/gue+WiniyHgzx1i7RwChaw5UpgF6yewDFQ2rEJ3g/LgAGvf79 xpYqB5pV8rfXhm5BhAunCeY3zqV/B0ZDfzJuSH1473v5XJpqCugbfkpXuzpDwRNR9whF DKudliVGpCJUy0ZxScYNcsBbF7+k1ltnLqNa/+tHvzG9muCXJbssf0m4nHNJGl7md10q IqxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Sp4luMaF6IKbI/3fhMGnaHSP2UluU8wsl5sO/u1BVg8=; b=jy/zpU07BqHYd/99K7DVW7YGUflXVi9K2KhInJ6/bT47C2MFuWeXKr+o3AOBDbnxyf 6v6jCBPkJMLTz5h0/9b6cuPwBLksH5Z+WyCK6cPD55SRqD0M4r5X2gIqwz30Bbh87Vz8 phRIJEppuo4lARI1TpKJabHAV9qLxm620LlIgRocW54gavZNx2twtY1acWOMKd3P8mhG n5H8QUyF019QKLN7QjP+cT8PO9PqVF2tXx5r57qXKO5RCJrrSUZpbOaCXKKx7LIinYZa /Si0Z2BEkt+h3tdCg7qIDMHzgeMWHYDbz/Mgtz/q9ECl1BbWmLbz5R9MIdRzkVctSDYF LF1g== X-Gm-Message-State: AGi0PuZY2EWu+NV0V5J+TJPkqnwXXLz5yaxU0RqDlwkHslyXiWQGq1+j 9JYVyl6d3DF3x1o36GS4vR14XA== X-Google-Smtp-Source: APiQypK4Dfb2FAR2CSwLiWHXdfhVVee7mbYkoiVuuMUHAzuuzPxl4/tmD+Z8446kUGgatAEm6mHUlA== X-Received: by 2002:aed:2591:: with SMTP id x17mr188790qtc.76.1588635442816; Mon, 04 May 2020 16:37:22 -0700 (PDT) Received: from beast.localdomain (c-73-185-129-58.hsd1.mn.comcast.net. [73.185.129.58]) by smtp.gmail.com with ESMTPSA id x125sm494311qke.34.2020.05.04.16.37.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 May 2020 16:37:21 -0700 (PDT) From: Alex Elder To: davem@davemloft.net Cc: evgreen@chromium.org, subashab@codeaurora.org, cpratapa@codeaurora.org, bjorn.andersson@linaro.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 3/3] net: ipa: remove endpoint delay mode feature Date: Mon, 4 May 2020 18:37:13 -0500 Message-Id: <20200504233713.16954-4-elder@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200504233713.16954-1-elder@linaro.org> References: <20200504233713.16954-1-elder@linaro.org> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org A "delay mode" feature was put in place to work around a problem that was observed during development of the upstream IPA driver. It used TX endpoint "delay mode" in order to prevent transmitting packets toward the modem before it was ready. A race condition that would explain the problem has long since been fixed, and we have concluded that the "delay mode" feature is no longer required. So get rid of it. Signed-off-by: Alex Elder --- drivers/net/ipa/ipa_data-sdm845.c | 1 - drivers/net/ipa/ipa_data.h | 6 ------ drivers/net/ipa/ipa_endpoint.c | 4 +--- 3 files changed, 1 insertion(+), 10 deletions(-) diff --git a/drivers/net/ipa/ipa_data-sdm845.c b/drivers/net/ipa/ipa_data-sdm845.c index f7ba85717edf..52d4b84e0dac 100644 --- a/drivers/net/ipa/ipa_data-sdm845.c +++ b/drivers/net/ipa/ipa_data-sdm845.c @@ -74,7 +74,6 @@ static const struct ipa_gsi_endpoint_data ipa_gsi_endpoint_data[] = { .tx = { .status_endpoint = IPA_ENDPOINT_MODEM_AP_RX, - .delay = true, }, }, }, diff --git a/drivers/net/ipa/ipa_data.h b/drivers/net/ipa/ipa_data.h index 16dfd74717b1..7fc1058a5ca9 100644 --- a/drivers/net/ipa/ipa_data.h +++ b/drivers/net/ipa/ipa_data.h @@ -80,18 +80,12 @@ struct gsi_channel_data { /** * struct ipa_endpoint_tx_data - configuration data for TX endpoints * @status_endpoint: endpoint to which status elements are sent - * @delay: whether endpoint starts in delay mode - * - * Delay mode prevents a TX endpoint from transmitting anything, even if - * commands have been presented to the hardware. Once the endpoint exits - * delay mode, queued transfer commands are sent. * * The @status_endpoint is only valid if the endpoint's @status_enable * flag is set. */ struct ipa_endpoint_tx_data { enum ipa_endpoint_name status_endpoint; - bool delay; }; /** diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c index a830101b8edb..8dc12ec18fc7 100644 --- a/drivers/net/ipa/ipa_endpoint.c +++ b/drivers/net/ipa/ipa_endpoint.c @@ -1341,10 +1341,8 @@ int ipa_endpoint_stop(struct ipa_endpoint *endpoint) static void ipa_endpoint_program(struct ipa_endpoint *endpoint) { if (endpoint->toward_ipa) { - bool delay_mode = endpoint->data->tx.delay; - if (endpoint->ipa->version != IPA_VERSION_4_2) - ipa_endpoint_program_delay(endpoint, delay_mode); + ipa_endpoint_program_delay(endpoint, false); ipa_endpoint_init_hdr_ext(endpoint); ipa_endpoint_init_aggr(endpoint); ipa_endpoint_init_deaggr(endpoint);