From patchwork Fri Apr 24 20:06:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sowjanya Komatineni X-Patchwork-Id: 226963 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 94F24C55186 for ; Fri, 24 Apr 2020 20:06:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6FC652168B for ; Fri, 24 Apr 2020 20:06:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="FDQFBwr1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726908AbgDXUGR (ORCPT ); Fri, 24 Apr 2020 16:06:17 -0400 Received: from hqnvemgate24.nvidia.com ([216.228.121.143]:3441 "EHLO hqnvemgate24.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727021AbgDXUGL (ORCPT ); Fri, 24 Apr 2020 16:06:11 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate24.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Fri, 24 Apr 2020 13:04:13 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Fri, 24 Apr 2020 13:06:11 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Fri, 24 Apr 2020 13:06:11 -0700 Received: from HQMAIL105.nvidia.com (172.20.187.12) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 24 Apr 2020 20:06:10 +0000 Received: from hqnvemgw03.nvidia.com (10.124.88.68) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Fri, 24 Apr 2020 20:06:10 +0000 Received: from skomatineni-linux.nvidia.com (Not Verified[10.2.165.152]) by hqnvemgw03.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Fri, 24 Apr 2020 13:06:10 -0700 From: Sowjanya Komatineni To: , , , , , , , , , CC: , , , , Subject: [PATCH 5.4.33 1/2] sdhci: tegra: Implement Tegra specific set_timeout callback Date: Fri, 24 Apr 2020 13:06:05 -0700 Message-ID: <1587758766-3274-2-git-send-email-skomatineni@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1587758766-3274-1-git-send-email-skomatineni@nvidia.com> References: <1587758766-3274-1-git-send-email-skomatineni@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1587758653; bh=kYhxxXI3LV4oeArlKvtdIWzgGCgrp9TkYQa4roEyFZw=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=FDQFBwr1hpUC2niR1RA8js9PnowEMS+B1wRQyvP6Su+HpGxas2tWbCJklNVZ8rUyI ykidBCZKl4+849ldTEi6N4wR1zKKrlFPtQNDCdqliTaVz0OvAxftlyYXozDspBgZ3N 6O6jwXsvkykoP0qGyrzXOEBcenm+qFUBvnHP6Zd7FUrJEEyLbR9vOD1t0XOVOuVm8e niHtbZNypi05QIESYgw9a4WRFHzy4jmhjhb2WQ0nqdiA2OpZmea5l46EVZzJ6TIFwl JD3aXywohoGssVCHWiKDHQcqCu47RnzFHStQwnKoxYty+qm529i2R4gfkLQY9fc1vg 2RLm1CQijZVzg== Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org commit 5e958e4aacf4 ("sdhci: tegra: Implement Tegra specific set_timeout callback") Tegra host supports HW busy detection and timeouts based on the count programmed in SDHCI_TIMEOUT_CONTROL register and max busy timeout it supports is 11s in finite busy wait mode. Some operations like SLEEP_AWAKE, ERASE and flush cache through SWITCH commands take longer than 11s and Tegra host supports infinite HW busy wait mode where HW waits forever till the card is busy without HW timeout. This patch implements Tegra specific set_timeout sdhci_ops to allow switching between finite and infinite HW busy detection wait modes based on the device command expected operation time. Cc: Signed-off-by: Sowjanya Komatineni --- drivers/mmc/host/sdhci-tegra.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index a25c3a4..fa8f6a4 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -45,6 +45,7 @@ #define SDHCI_TEGRA_CAP_OVERRIDES_DQS_TRIM_SHIFT 8 #define SDHCI_TEGRA_VENDOR_MISC_CTRL 0x120 +#define SDHCI_MISC_CTRL_ERASE_TIMEOUT_LIMIT BIT(0) #define SDHCI_MISC_CTRL_ENABLE_SDR104 0x8 #define SDHCI_MISC_CTRL_ENABLE_SDR50 0x10 #define SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300 0x20 @@ -1227,6 +1228,34 @@ static u32 sdhci_tegra_cqhci_irq(struct sdhci_host *host, u32 intmask) return 0; } +static void tegra_sdhci_set_timeout(struct sdhci_host *host, + struct mmc_command *cmd) +{ + u32 val; + + /* + * HW busy detection timeout is based on programmed data timeout + * counter and maximum supported timeout is 11s which may not be + * enough for long operations like cache flush, sleep awake, erase. + * + * ERASE_TIMEOUT_LIMIT bit of VENDOR_MISC_CTRL register allows + * host controller to wait for busy state until the card is busy + * without HW timeout. + * + * So, use infinite busy wait mode for operations that may take + * more than maximum HW busy timeout of 11s otherwise use finite + * busy wait mode. + */ + val = sdhci_readl(host, SDHCI_TEGRA_VENDOR_MISC_CTRL); + if (cmd && cmd->busy_timeout >= 11 * HZ) + val |= SDHCI_MISC_CTRL_ERASE_TIMEOUT_LIMIT; + else + val &= ~SDHCI_MISC_CTRL_ERASE_TIMEOUT_LIMIT; + sdhci_writel(host, val, SDHCI_TEGRA_VENDOR_MISC_CTRL); + + __sdhci_set_timeout(host, cmd); +} + static const struct cqhci_host_ops sdhci_tegra_cqhci_ops = { .write_l = tegra_cqhci_writel, .enable = sdhci_tegra_cqe_enable, @@ -1366,6 +1395,7 @@ static const struct sdhci_ops tegra210_sdhci_ops = { .set_uhs_signaling = tegra_sdhci_set_uhs_signaling, .voltage_switch = tegra_sdhci_voltage_switch, .get_max_clock = tegra_sdhci_get_max_clock, + .set_timeout = tegra_sdhci_set_timeout, }; static const struct sdhci_pltfm_data sdhci_tegra210_pdata = { @@ -1403,6 +1433,7 @@ static const struct sdhci_ops tegra186_sdhci_ops = { .voltage_switch = tegra_sdhci_voltage_switch, .get_max_clock = tegra_sdhci_get_max_clock, .irq = sdhci_tegra_cqhci_irq, + .set_timeout = tegra_sdhci_set_timeout, }; static const struct sdhci_pltfm_data sdhci_tegra186_pdata = {