From patchwork Fri Dec 13 04:19:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 13906433 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B0883188704; Fri, 13 Dec 2024 04:20:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734063623; cv=none; b=NQeg1+5/FpxEmBQMhsVwKxUg5OJtdbFQO5cjkErjRzbZp8nC1ip0isnAsSyIqus7XsIe3NI8HkmHKhVX8FhvvxF8daOQ7HcHOidd3mLSdz/d4Q//awYf2WE9ooDe7ZK7Dhx+rIAxmxAwXO6syPgv/eIw0awawJM5vNQM5lISAsM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734063623; c=relaxed/simple; bh=TKrz7gfLUKWQhnXE/Ix3m6ODh2E5Y+Lpg0g9lnlAGcc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=joWbOKGyMzUxnW11/Jru2FoeM4mHp1qqUzp+Z0c4rcw6k6VFlWGloeZTEHacAYhKTnCUlAhwlXsPT5G6uyay820g53revxAF9pFequrd/yd5jjUGWdAttrBMLqs5U+8fXHLki/DVqso7N5Oyv+fZyr8u2ZNyB7fzu5oH79aw9eA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TRiimf/F; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="TRiimf/F" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98EC1C4AF0B; Fri, 13 Dec 2024 04:20:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734063623; bh=TKrz7gfLUKWQhnXE/Ix3m6ODh2E5Y+Lpg0g9lnlAGcc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TRiimf/F1becCkNpqdGde7rE/Xjtv6JhKClx4HawYi6i2tPF6XJoYzg1cNpWmvvNg 1DDSDtr1sODaYZkKA6ATz1ve99wtE1THj36W6mz2+ZKlGuKxu2ebvU8alklh2UzZtw /SE5UdfLkao/WdEcQArMfvmr05hbh/hd1QYDG7kugTF7nD3xr6ovfM3lstSYTFClYR mYjFcxdNjOBt/1VHCwwssqc0D9SYyWu7UYUW7j9b1BpxlVfC7VDImpx5ApkToYHRxp nSSjGPgkNtzYFOHWFd1DGMHlC1aSLMfo1l+kp5s8bNKrR3EaipR6mKOe0BZYL2UIT7 2qpq/6/tyngIQ== From: Eric Biggers To: linux-block@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, linux-arm-msm@vger.kernel.org, Bartosz Golaszewski , Gaurav Kashyap Cc: Adrian Hunter , Alim Akhtar , Avri Altman , Bart Van Assche , Bjorn Andersson , Dmitry Baryshkov , "James E . J . Bottomley" , Jens Axboe , Konrad Dybcio , Manivannan Sadhasivam , "Martin K . Petersen" , Ulf Hansson , Bartosz Golaszewski Subject: [PATCH v10 03/15] ufs: qcom: convert to use UFSHCD_QUIRK_CUSTOM_CRYPTO_PROFILE Date: Thu, 12 Dec 2024 20:19:46 -0800 Message-ID: <20241213041958.202565-4-ebiggers@kernel.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241213041958.202565-1-ebiggers@kernel.org> References: <20241213041958.202565-1-ebiggers@kernel.org> Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Eric Biggers By default the UFS core is responsible for initializing the blk_crypto_profile, but Qualcomm platforms have their own way of programming and evicting crypto keys. So currently ufs_hba_variant_ops::program_key is used to redirect control flow from ufshcd_program_key(). This has worked until now, but it's a bit of a hack, given that the key (and algorithm ID etc.) ends up being converted from blk_crypto_key => ufs_crypto_cfg_entry => SCM call parameters, where the intermediate ufs_crypto_cfg_entry step is unnecessary. Taking a similar approach with the upcoming wrapped key support, the implementation of which is similarly platform-specific, would require adding four new methods to ufs_hba_variant_ops, changing program_key to take the struct blk_crypto_key, and adding a new UFSHCD_CAP_* flag to indicate support for wrapped keys. This patch takes a different approach. It changes ufs-qcom to use the existing UFSHCD_QUIRK_CUSTOM_CRYPTO_PROFILE which was recently added for ufs-exynos. This allows it to override the full blk_crypto_profile, eliminating the need for the existing ufs_hba_variant_ops::program_key and the hooks that would have been needed for wrapped key support. It does require a bit of duplicated code to read the crypto capability registers, but it's worth the simplification in design with ufs-qcom and ufs-exynos now using the same method to customize the crypto profile, and it makes it much easier to add wrapped key support. Tested-by: Bartosz Golaszewski # sm8650 Signed-off-by: Eric Biggers --- drivers/ufs/host/ufs-qcom.c | 91 +++++++++++++++++++++++++++++-------- 1 file changed, 72 insertions(+), 19 deletions(-) diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index e33ae71245dd..de37d5933ca9 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -110,15 +110,22 @@ static inline void ufs_qcom_ice_enable(struct ufs_qcom_host *host) { if (host->hba->caps & UFSHCD_CAP_CRYPTO) qcom_ice_enable(host->ice); } +static const struct blk_crypto_ll_ops ufs_qcom_crypto_ops; /* forward decl */ + static int ufs_qcom_ice_init(struct ufs_qcom_host *host) { struct ufs_hba *hba = host->hba; + struct blk_crypto_profile *profile = &hba->crypto_profile; struct device *dev = hba->dev; struct qcom_ice *ice; + union ufs_crypto_capabilities caps; + union ufs_crypto_cap_entry cap; + int err; + int i; ice = of_qcom_ice_get(dev); if (ice == ERR_PTR(-EOPNOTSUPP)) { dev_warn(dev, "Disabling inline encryption support\n"); ice = NULL; @@ -126,12 +133,42 @@ static int ufs_qcom_ice_init(struct ufs_qcom_host *host) if (IS_ERR_OR_NULL(ice)) return PTR_ERR_OR_ZERO(ice); host->ice = ice; - hba->caps |= UFSHCD_CAP_CRYPTO; + /* Initialize the blk_crypto_profile */ + + caps.reg_val = cpu_to_le32(ufshcd_readl(hba, REG_UFS_CCAP)); + + /* The number of keyslots supported is (CFGC+1) */ + err = devm_blk_crypto_profile_init(dev, profile, caps.config_count + 1); + if (err) + return err; + + profile->ll_ops = ufs_qcom_crypto_ops; + profile->max_dun_bytes_supported = 8; + profile->dev = dev; + + /* + * Currently this driver only supports AES-256-XTS. All known versions + * of ICE support it, but to be safe make sure it is really declared in + * the crypto capability registers. The crypto capability registers + * also give the supported data unit size(s). + */ + for (i = 0; i < caps.num_crypto_cap; i++) { + cap.reg_val = cpu_to_le32(ufshcd_readl(hba, + REG_UFS_CRYPTOCAP + + i * sizeof(__le32))); + if (cap.algorithm_id == UFS_CRYPTO_ALG_AES_XTS && + cap.key_size == UFS_CRYPTO_KEY_SIZE_256) + profile->modes_supported[BLK_ENCRYPTION_MODE_AES_256_XTS] |= + cap.sdus_mask * 512; + } + + hba->caps |= UFSHCD_CAP_CRYPTO; + hba->quirks |= UFSHCD_QUIRK_CUSTOM_CRYPTO_PROFILE; return 0; } static inline int ufs_qcom_ice_resume(struct ufs_qcom_host *host) { @@ -147,36 +184,53 @@ static inline int ufs_qcom_ice_suspend(struct ufs_qcom_host *host) return qcom_ice_suspend(host->ice); return 0; } -static int ufs_qcom_ice_program_key(struct ufs_hba *hba, - const union ufs_crypto_cfg_entry *cfg, - int slot) +static int ufs_qcom_ice_keyslot_program(struct blk_crypto_profile *profile, + const struct blk_crypto_key *key, + unsigned int slot) { + struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile); struct ufs_qcom_host *host = ufshcd_get_variant(hba); - union ufs_crypto_cap_entry cap; - - if (!(cfg->config_enable & UFS_CRYPTO_CONFIGURATION_ENABLE)) - return qcom_ice_evict_key(host->ice, slot); + int err; /* Only AES-256-XTS has been tested so far. */ - cap = hba->crypto_cap_array[cfg->crypto_cap_idx]; - if (cap.algorithm_id != UFS_CRYPTO_ALG_AES_XTS || - cap.key_size != UFS_CRYPTO_KEY_SIZE_256) + if (key->crypto_cfg.crypto_mode != BLK_ENCRYPTION_MODE_AES_256_XTS) return -EOPNOTSUPP; - return qcom_ice_program_key(host->ice, - QCOM_ICE_CRYPTO_ALG_AES_XTS, - QCOM_ICE_CRYPTO_KEY_SIZE_256, - cfg->crypto_key, - cfg->data_unit_size, slot); + ufshcd_hold(hba); + err = qcom_ice_program_key(host->ice, + QCOM_ICE_CRYPTO_ALG_AES_XTS, + QCOM_ICE_CRYPTO_KEY_SIZE_256, + key->raw, + key->crypto_cfg.data_unit_size / 512, + slot); + ufshcd_release(hba); + return err; } -#else +static int ufs_qcom_ice_keyslot_evict(struct blk_crypto_profile *profile, + const struct blk_crypto_key *key, + unsigned int slot) +{ + struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile); + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + int err; + + ufshcd_hold(hba); + err = qcom_ice_evict_key(host->ice, slot); + ufshcd_release(hba); + return err; +} -#define ufs_qcom_ice_program_key NULL +static const struct blk_crypto_ll_ops ufs_qcom_crypto_ops = { + .keyslot_program = ufs_qcom_ice_keyslot_program, + .keyslot_evict = ufs_qcom_ice_keyslot_evict, +}; + +#else static inline void ufs_qcom_ice_enable(struct ufs_qcom_host *host) { } @@ -1820,11 +1874,10 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = { .suspend = ufs_qcom_suspend, .resume = ufs_qcom_resume, .dbg_register_dump = ufs_qcom_dump_dbg_regs, .device_reset = ufs_qcom_device_reset, .config_scaling_param = ufs_qcom_config_scaling_param, - .program_key = ufs_qcom_ice_program_key, .reinit_notify = ufs_qcom_reinit_notify, .mcq_config_resource = ufs_qcom_mcq_config_resource, .get_hba_mac = ufs_qcom_get_hba_mac, .op_runtime_config = ufs_qcom_op_runtime_config, .get_outstanding_cqs = ufs_qcom_get_outstanding_cqs,