From patchwork Mon Mar 13 11:52:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abel Vesa X-Patchwork-Id: 13172382 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 B91D4C74A4B for ; Mon, 13 Mar 2023 11:53:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231411AbjCMLxS (ORCPT ); Mon, 13 Mar 2023 07:53:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231419AbjCMLwo (ORCPT ); Mon, 13 Mar 2023 07:52:44 -0400 Received: from mail-wm1-x32a.google.com (mail-wm1-x32a.google.com [IPv6:2a00:1450:4864:20::32a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3D21D22DC4 for ; Mon, 13 Mar 2023 04:52:20 -0700 (PDT) Received: by mail-wm1-x32a.google.com with SMTP id bg16-20020a05600c3c9000b003eb34e21bdfso10764520wmb.0 for ; Mon, 13 Mar 2023 04:52:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1678708338; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=uRIW2zbp7MHqHx3c6UP9xAGWM5wcqXWcFdnNET+ThmQ=; b=z4bV5Z/kzaWyHAbljSYTLoVJZaLLiuN0W7E0VafYtUua1rxIbhjd/6sK7unW2rlsse 6uB/k3KPdiddCPUY+jGj9EEg3/Klf+I9ciUae4AFGxIfavxS1MNjMCiU2p9Jeia20gKr JuKs7TZ4GjTM+vcIO5t9DRWkdtZJ0f0F7ys9W4147qJbV+lgNIvx61aYJ9D6LcGCJPsa g65s5YYRkVwt4T1LYiWyzFMFevKXiQ6FiIy+y/dpaCbbAxidBl5kHDQC7vVztOxd2r/6 Av/tphPV6Q2s+mow/5UVEAy88AoqDzNV3GTzwb5wXKwl016DWpKdJWwfIRugS71Eqnqk aHlw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678708338; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=uRIW2zbp7MHqHx3c6UP9xAGWM5wcqXWcFdnNET+ThmQ=; b=ltG+Nja7E0aM2zx4aVupCHt/XqWutONJBDQmyzcX4zQK51TPpabDnCgWpOQ7IgMxZ0 WnOtxjMFW92Kw+mJNxeM8IcWpxfGLtrPM+2BgppbGGqqbEPqzU54RTA8RB6EFMw7vlh1 N+DtlPwEegTvz54iktsfk4pfg/VoCbHV+DPy1ffY1/+W6EA/NwsMNMmyO0bm3nGsVxlv cTGYWmTVOSUsPmRlDDODrGF8slOmZHA7dkSb/RfMkAPNwb8qc8C/INuGLBPxTxCZA0vV JE9Xydiv9JfGz6lWALZtZj+ZxvlugU1wT8CHGk4IjSpZCB1rUYUq2MxDQpZxHx3UGvv5 PW3A== X-Gm-Message-State: AO0yUKWqIqQJe2OHxu8FWezy8GCpz8ItdDBM8CFTiIhUdRex3ZhApq8g 2rw3JMlF3AkKJZu9iEmRI0me+w== X-Google-Smtp-Source: AK7set9zeZ2Nx7PmlEnsRpcHcGPEm/iUhVy7d50+0gwnxi8fsyDyYiB3oO3FnbK9mqX+nNELjEB7mw== X-Received: by 2002:a05:600c:1d84:b0:3eb:2de8:b72a with SMTP id p4-20020a05600c1d8400b003eb2de8b72amr10361650wms.7.1678708338647; Mon, 13 Mar 2023 04:52:18 -0700 (PDT) Received: from localhost.localdomain ([94.52.112.99]) by smtp.gmail.com with ESMTPSA id u15-20020a05600c440f00b003e21dcccf9fsm8801090wmn.16.2023.03.13.04.52.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Mar 2023 04:52:18 -0700 (PDT) From: Abel Vesa To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Andy Gross , Bjorn Andersson , Konrad Dybcio , Manivannan Sadhasivam , Alim Akhtar , Avri Altman , Bart Van Assche , Adrian Hunter , "James E . J . Bottomley" , "Martin K . Petersen" , Herbert Xu , "David S . Miller" , Eric Biggers Cc: linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, Linux Kernel Mailing List , linux-arm-msm@vger.kernel.org, linux-crypto@vger.kernel.org, linux-scsi@vger.kernel.org Subject: [RFC PATCH v3 6/7] mmc: sdhci-msm: Switch to the new ICE API Date: Mon, 13 Mar 2023 13:52:01 +0200 Message-Id: <20230313115202.3960700-7-abel.vesa@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230313115202.3960700-1-abel.vesa@linaro.org> References: <20230313115202.3960700-1-abel.vesa@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Now that there is a new dedicated ICE driver, drop the sdhci-msm ICE implementation and use the new ICE api provided by the Qualcomm soc driver ice. The platforms that already have ICE support will use the API as library since there will not be a devicetree node, but instead they have reg range. In this case, the of_qcom_ice_get will return an ICE instance created for the consumer's device. But if there are platforms that do not have ice reg in the consumer devicetree node and instead provide a dedicated ICE devicetree node, theof_qcom_ice_get will look up the device based on qcom,ice property and will get the ICE instance registered by the probe function of the ice driver. Signed-off-by: Abel Vesa --- Changes since v2: * added the suspend API call for ICE * kept old wrappers over ICE API in Changes since v1: * Added a check for supported algorithm and key size and passed the ICE defined values for algorithm and key size * Added call to evict function drivers/mmc/host/Kconfig | 2 +- drivers/mmc/host/sdhci-msm.c | 215 ++++++----------------------------- 2 files changed, 36 insertions(+), 181 deletions(-) diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 4745fe217ade..09f837df5435 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -549,7 +549,7 @@ config MMC_SDHCI_MSM depends on MMC_SDHCI_PLTFM select MMC_SDHCI_IO_ACCESSORS select MMC_CQHCI - select QCOM_SCM if MMC_CRYPTO + select QCOM_INLINE_CRYPTO_ENGINE if MMC_CRYPTO help This selects the Secure Digital Host Controller Interface (SDHCI) support present in Qualcomm SOCs. The controller supports diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index 8ac81d57a3df..870bc466be44 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -19,6 +19,8 @@ #include #include +#include + #include "sdhci-cqhci.h" #include "sdhci-pltfm.h" #include "cqhci.h" @@ -258,12 +260,14 @@ struct sdhci_msm_variant_info { struct sdhci_msm_host { struct platform_device *pdev; void __iomem *core_mem; /* MSM SDCC mapped address */ - void __iomem *ice_mem; /* MSM ICE mapped address (if available) */ int pwr_irq; /* power irq */ struct clk *bus_clk; /* SDHC bus voter clock */ struct clk *xo_clk; /* TCXO clk needed for FLL feature of cm_dll*/ - /* core, iface, cal, sleep, and ice clocks */ - struct clk_bulk_data bulk_clks[5]; + /* core, iface, cal and sleep clocks */ + struct clk_bulk_data bulk_clks[4]; +#ifdef CONFIG_MMC_CRYPTO + struct qcom_ice *ice; +#endif unsigned long clk_rate; struct mmc_host *mmc; bool use_14lpp_dll_reset; @@ -1804,164 +1808,39 @@ static void sdhci_msm_set_clock(struct sdhci_host *host, unsigned int clock) #ifdef CONFIG_MMC_CRYPTO -#define AES_256_XTS_KEY_SIZE 64 - -/* QCOM ICE registers */ - -#define QCOM_ICE_REG_VERSION 0x0008 - -#define QCOM_ICE_REG_FUSE_SETTING 0x0010 -#define QCOM_ICE_FUSE_SETTING_MASK 0x1 -#define QCOM_ICE_FORCE_HW_KEY0_SETTING_MASK 0x2 -#define QCOM_ICE_FORCE_HW_KEY1_SETTING_MASK 0x4 - -#define QCOM_ICE_REG_BIST_STATUS 0x0070 -#define QCOM_ICE_BIST_STATUS_MASK 0xF0000000 - -#define QCOM_ICE_REG_ADVANCED_CONTROL 0x1000 - -#define sdhci_msm_ice_writel(host, val, reg) \ - writel((val), (host)->ice_mem + (reg)) -#define sdhci_msm_ice_readl(host, reg) \ - readl((host)->ice_mem + (reg)) - -static bool sdhci_msm_ice_supported(struct sdhci_msm_host *msm_host) -{ - struct device *dev = mmc_dev(msm_host->mmc); - u32 regval = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_VERSION); - int major = regval >> 24; - int minor = (regval >> 16) & 0xFF; - int step = regval & 0xFFFF; - - /* For now this driver only supports ICE version 3. */ - if (major != 3) { - dev_warn(dev, "Unsupported ICE version: v%d.%d.%d\n", - major, minor, step); - return false; - } - - dev_info(dev, "Found QC Inline Crypto Engine (ICE) v%d.%d.%d\n", - major, minor, step); - - /* If fuses are blown, ICE might not work in the standard way. */ - regval = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_FUSE_SETTING); - if (regval & (QCOM_ICE_FUSE_SETTING_MASK | - QCOM_ICE_FORCE_HW_KEY0_SETTING_MASK | - QCOM_ICE_FORCE_HW_KEY1_SETTING_MASK)) { - dev_warn(dev, "Fuses are blown; ICE is unusable!\n"); - return false; - } - return true; -} - -static inline struct clk *sdhci_msm_ice_get_clk(struct device *dev) -{ - return devm_clk_get(dev, "ice"); -} - static int sdhci_msm_ice_init(struct sdhci_msm_host *msm_host, struct cqhci_host *cq_host) { struct mmc_host *mmc = msm_host->mmc; struct device *dev = mmc_dev(mmc); - struct resource *res; - - if (!(cqhci_readl(cq_host, CQHCI_CAP) & CQHCI_CAP_CS)) - return 0; - - res = platform_get_resource_byname(msm_host->pdev, IORESOURCE_MEM, - "ice"); - if (!res) { - dev_warn(dev, "ICE registers not found\n"); - goto disable; - } + int ret = 0; - if (!qcom_scm_ice_available()) { - dev_warn(dev, "ICE SCM interface not found\n"); - goto disable; + if (cqhci_readl(cq_host, CQHCI_CAP) & CQHCI_CAP_CS) { + msm_host->ice = of_qcom_ice_get(dev); + if (IS_ERR(msm_host->ice)) + ret = PTR_ERR(msm_host->ice); } - msm_host->ice_mem = devm_ioremap_resource(dev, res); - if (IS_ERR(msm_host->ice_mem)) - return PTR_ERR(msm_host->ice_mem); - - if (!sdhci_msm_ice_supported(msm_host)) - goto disable; - - mmc->caps2 |= MMC_CAP2_CRYPTO; - return 0; - -disable: - dev_warn(dev, "Disabling inline encryption support\n"); - return 0; -} - -static void sdhci_msm_ice_low_power_mode_enable(struct sdhci_msm_host *msm_host) -{ - u32 regval; - - regval = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_ADVANCED_CONTROL); - /* - * Enable low power mode sequence - * [0]-0, [1]-0, [2]-0, [3]-E, [4]-0, [5]-0, [6]-0, [7]-0 - */ - regval |= 0x7000; - sdhci_msm_ice_writel(msm_host, regval, QCOM_ICE_REG_ADVANCED_CONTROL); -} - -static void sdhci_msm_ice_optimization_enable(struct sdhci_msm_host *msm_host) -{ - u32 regval; - - /* ICE Optimizations Enable Sequence */ - regval = sdhci_msm_ice_readl(msm_host, QCOM_ICE_REG_ADVANCED_CONTROL); - regval |= 0xD807100; - /* ICE HPG requires delay before writing */ - udelay(5); - sdhci_msm_ice_writel(msm_host, regval, QCOM_ICE_REG_ADVANCED_CONTROL); - udelay(5); + return ret; } -/* - * Wait until the ICE BIST (built-in self-test) has completed. - * - * This may be necessary before ICE can be used. - * - * Note that we don't really care whether the BIST passed or failed; we really - * just want to make sure that it isn't still running. This is because (a) the - * BIST is a FIPS compliance thing that never fails in practice, (b) ICE is - * documented to reject crypto requests if the BIST fails, so we needn't do it - * in software too, and (c) properly testing storage encryption requires testing - * the full storage stack anyway, and not relying on hardware-level self-tests. - */ -static int sdhci_msm_ice_wait_bist_status(struct sdhci_msm_host *msm_host) +static void sdhci_msm_ice_enable(struct sdhci_msm_host *msm_host) { - u32 regval; - int err; - - err = readl_poll_timeout(msm_host->ice_mem + QCOM_ICE_REG_BIST_STATUS, - regval, !(regval & QCOM_ICE_BIST_STATUS_MASK), - 50, 5000); - if (err) - dev_err(mmc_dev(msm_host->mmc), - "Timed out waiting for ICE self-test to complete\n"); - return err; + qcom_ice_enable(msm_host->ice); } -static void sdhci_msm_ice_enable(struct sdhci_msm_host *msm_host) +static int __maybe_unused sdhci_msm_ice_resume(struct sdhci_msm_host *msm_host) { if (!(msm_host->mmc->caps2 & MMC_CAP2_CRYPTO)) - return; - sdhci_msm_ice_low_power_mode_enable(msm_host); - sdhci_msm_ice_optimization_enable(msm_host); - sdhci_msm_ice_wait_bist_status(msm_host); + return 0; + return qcom_ice_resume(msm_host->ice); } -static int __maybe_unused sdhci_msm_ice_resume(struct sdhci_msm_host *msm_host) +static int __maybe_unused sdhci_msm_ice_suspend(struct sdhci_msm_host *msm_host) { if (!(msm_host->mmc->caps2 & MMC_CAP2_CRYPTO)) return 0; - return sdhci_msm_ice_wait_bist_status(msm_host); + return qcom_ice_suspend(msm_host->ice); } /* @@ -1972,48 +1851,29 @@ static int sdhci_msm_program_key(struct cqhci_host *cq_host, const union cqhci_crypto_cfg_entry *cfg, int slot) { - struct device *dev = mmc_dev(cq_host->mmc); + struct sdhci_host *host = mmc_priv(cq_host->mmc); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); union cqhci_crypto_cap_entry cap; - union { - u8 bytes[AES_256_XTS_KEY_SIZE]; - u32 words[AES_256_XTS_KEY_SIZE / sizeof(u32)]; - } key; - int i; - int err; - - if (!(cfg->config_enable & CQHCI_CRYPTO_CONFIGURATION_ENABLE)) - return qcom_scm_ice_invalidate_key(slot); /* Only AES-256-XTS has been tested so far. */ cap = cq_host->crypto_cap_array[cfg->crypto_cap_idx]; if (cap.algorithm_id != CQHCI_CRYPTO_ALG_AES_XTS || - cap.key_size != CQHCI_CRYPTO_KEY_SIZE_256) { - dev_err_ratelimited(dev, - "Unhandled crypto capability; algorithm_id=%d, key_size=%d\n", - cap.algorithm_id, cap.key_size); + cap.key_size != CQHCI_CRYPTO_KEY_SIZE_256) return -EINVAL; - } - - memcpy(key.bytes, cfg->crypto_key, AES_256_XTS_KEY_SIZE); - - /* - * The SCM call byte-swaps the 32-bit words of the key. So we have to - * do the same, in order for the final key be correct. - */ - for (i = 0; i < ARRAY_SIZE(key.words); i++) - __cpu_to_be32s(&key.words[i]); - err = qcom_scm_ice_set_key(slot, key.bytes, AES_256_XTS_KEY_SIZE, - QCOM_SCM_ICE_CIPHER_AES_256_XTS, - cfg->data_unit_size); - memzero_explicit(&key, sizeof(key)); - return err; + if (cfg->config_enable & CQHCI_CRYPTO_CONFIGURATION_ENABLE) + return qcom_ice_program_key(msm_host->ice, + cfg->crypto_cap_idx, + QCOM_ICE_CRYPTO_ALG_AES_XTS, + QCOM_ICE_CRYPTO_KEY_SIZE_256, + cfg->crypto_key, + cfg->data_unit_size, slot); + else + return qcom_ice_evict_key(msm_host->ice, slot); } + #else /* CONFIG_MMC_CRYPTO */ -static inline struct clk *sdhci_msm_ice_get_clk(struct device *dev) -{ - return NULL; -} static inline int sdhci_msm_ice_init(struct sdhci_msm_host *msm_host, struct cqhci_host *cq_host) @@ -2630,11 +2490,6 @@ static int sdhci_msm_probe(struct platform_device *pdev) clk = NULL; msm_host->bulk_clks[3].clk = clk; - clk = sdhci_msm_ice_get_clk(&pdev->dev); - if (IS_ERR(clk)) - clk = NULL; - msm_host->bulk_clks[4].clk = clk; - ret = clk_bulk_prepare_enable(ARRAY_SIZE(msm_host->bulk_clks), msm_host->bulk_clks); if (ret) @@ -2827,7 +2682,7 @@ static __maybe_unused int sdhci_msm_runtime_suspend(struct device *dev) clk_bulk_disable_unprepare(ARRAY_SIZE(msm_host->bulk_clks), msm_host->bulk_clks); - return 0; + return sdhci_msm_ice_suspend(msm_host); } static __maybe_unused int sdhci_msm_runtime_resume(struct device *dev)