From patchwork Wed Mar 8 15:58:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abel Vesa X-Patchwork-Id: 13166092 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 87FC1C678D5 for ; Wed, 8 Mar 2023 16:00:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232365AbjCHQA0 (ORCPT ); Wed, 8 Mar 2023 11:00:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47458 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232439AbjCHP7z (ORCPT ); Wed, 8 Mar 2023 10:59:55 -0500 Received: from mail-wm1-x333.google.com (mail-wm1-x333.google.com [IPv6:2a00:1450:4864:20::333]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 14CAA5DC9C for ; Wed, 8 Mar 2023 07:59:27 -0800 (PST) Received: by mail-wm1-x333.google.com with SMTP id c18so10120860wmr.3 for ; Wed, 08 Mar 2023 07:59:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1678291158; 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=ck/palmYTP8fasbvz+Rpi5Ka2XmfXpWoqV0Vrpy+1GU=; b=tHML1VDhmT05adbczODJ/hRNqaIMrv9ogdrixBdRE/VYRgEEOWKXDqKHCvNyi7IG4B dUsSyjNLVIkjlB0tRWk/wuUsDsPyT1S9Bm6bmGEkRhwzuWKYQXeL1u8v/1NEs+8lItd9 zWIMTZ41WR2wu1vSMtLIFgqoTeXoAMfmzdwvge7sYWSyxCrYxWSBLq0lAq0ILmEoSjLK mgWgQpDQlpBvZO/XoRdH2acC3s/bdhrcZRG0CZtd5Bjv0lS4C8jZ4kXqkWt5nXWFPV9y tXCXdWoN5cICE2COZs3brxUiixz0UaR2/epYKBvgZlGdG7u8Z1IHcLGODLMCmaz7uKTl BLdQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678291158; 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=ck/palmYTP8fasbvz+Rpi5Ka2XmfXpWoqV0Vrpy+1GU=; b=bW0MbJhaDAxdXGl4XTSVOAc1X+dqI8lV7gUP4p7daEXAfQLSZWm8cPEIGjADur6tSt 6msO6zxnjD/NKoqKl3olniRXlZW5JRpG3vXQSg9ItAePM3pkd79OcOEpgl9y5chBlTjU OvaTXWxykhMQmv7h9zblvbYj514XUkeWAlnS8J+/Th3KHNqxtj4RiYGlkvD4M5JCZMaA 0kIDMGDmPPtXXLrtkU5oObVIvgKR0AQbpc9YZWh/iGCUjuDbC7DgELICv3BK8PPUKMUe Z8Yn0t2M6JeoDIcgeZGdLs3fdI3pj1sZ9ZH72uO19ucZ2kbIk3ubaJIK1BDmJBs/324s Gl3w== X-Gm-Message-State: AO0yUKX2LGFXz1JKziJ8mcsKEU03Xv5H0ZsqhAiNJO+omu/H1+79e6Py gqBijWGJ2wVPdE+tjoR3fihqWg== X-Google-Smtp-Source: AK7set+vYdFej2O2qQrEUer1x6h1WTgLgpIdQUhzLpZw25pZJfbJKiyOMbkOfihLqQ7pnTlPz0Z5fw== X-Received: by 2002:a05:600c:a49:b0:3eb:3692:644e with SMTP id c9-20020a05600c0a4900b003eb3692644emr16408043wmq.33.1678291158562; Wed, 08 Mar 2023 07:59:18 -0800 (PST) Received: from hackbox.lan ([94.52.112.99]) by smtp.gmail.com with ESMTPSA id 16-20020a05600c229000b003eb2e33f327sm2548430wmf.2.2023.03.08.07.59.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Mar 2023 07:59:17 -0800 (PST) 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" Cc: linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, Linux Kernel Mailing List , linux-arm-msm@vger.kernel.org, linux-scsi@vger.kernel.org Subject: [RFC PATCH v2 6/7] mmc: sdhci-msm: Switch to the new ICE API Date: Wed, 8 Mar 2023 17:58:37 +0200 Message-Id: <20230308155838.1094920-7-abel.vesa@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230308155838.1094920-1-abel.vesa@linaro.org> References: <20230308155838.1094920-1-abel.vesa@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@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 qcom-ice. Signed-off-by: Abel Vesa --- 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 | 257 +++++------------------------------ 2 files changed, 33 insertions(+), 226 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..5f00c0695527 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 +260,12 @@ 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]; + struct qcom_ice *ice; unsigned long clk_rate; struct mmc_host *mmc; bool use_14lpp_dll_reset; @@ -1802,233 +1804,37 @@ 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; - } - - if (!qcom_scm_ice_available()) { - dev_warn(dev, "ICE SCM interface not found\n"); - goto disable; - } - - 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); -} - -/* - * 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) -{ - 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; -} - -static void sdhci_msm_ice_enable(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); -} - -static int __maybe_unused sdhci_msm_ice_resume(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); -} - /* * Program a key into a QC ICE keyslot, or evict a keyslot. QC ICE requires * vendor-specific SCM calls for this; it doesn't support the standard way. */ +#ifdef CONFIG_MMC_CRYPTO + 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); + bool config_enable = cfg->config_enable & CQHCI_CRYPTO_CONFIGURATION_ENABLE; /* 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; -} -#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) -{ - return 0; -} - -static inline void sdhci_msm_ice_enable(struct sdhci_msm_host *msm_host) -{ -} -static inline int __maybe_unused -sdhci_msm_ice_resume(struct sdhci_msm_host *msm_host) -{ - return 0; + if (config_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); } #endif /* !CONFIG_MMC_CRYPTO */ @@ -2057,7 +1863,7 @@ static void sdhci_msm_cqe_enable(struct mmc_host *mmc) struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); sdhci_cqe_enable(mmc); - sdhci_msm_ice_enable(msm_host); + qcom_ice_enable(msm_host->ice); } static void sdhci_msm_cqe_disable(struct mmc_host *mmc, bool recovery) @@ -2149,9 +1955,13 @@ static int sdhci_msm_cqe_add_host(struct sdhci_host *host, dma64 = host->flags & SDHCI_USE_64_BIT_DMA; - ret = sdhci_msm_ice_init(msm_host, cq_host); - if (ret) - goto cleanup; + if (cqhci_readl(cq_host, CQHCI_CAP) & CQHCI_CAP_CS) { + msm_host->ice = of_qcom_ice_get(&pdev->dev); + if (IS_ERR(msm_host->ice)) { + ret = PTR_ERR(msm_host->ice); + goto cleanup; + } + } ret = cqhci_init(cq_host, host->mmc, dma64); if (ret) { @@ -2630,11 +2440,6 @@ 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) @@ -2853,7 +2658,9 @@ static __maybe_unused int sdhci_msm_runtime_resume(struct device *dev) dev_pm_opp_set_rate(dev, msm_host->clk_rate); - return sdhci_msm_ice_resume(msm_host); + if (!(msm_host->mmc->caps2 & MMC_CAP2_CRYPTO)) + return 0; + return qcom_ice_resume(msm_host->ice); } static const struct dev_pm_ops sdhci_msm_pm_ops = {