From patchwork Wed Aug 21 07:57:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Satya Tangirala X-Patchwork-Id: 11105925 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E2F8413A4 for ; Wed, 21 Aug 2019 07:57:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C14D4233A0 for ; Wed, 21 Aug 2019 07:57:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="fWI4uwOO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727041AbfHUH5f (ORCPT ); Wed, 21 Aug 2019 03:57:35 -0400 Received: from mail-yb1-f201.google.com ([209.85.219.201]:45200 "EHLO mail-yb1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727082AbfHUH5e (ORCPT ); Wed, 21 Aug 2019 03:57:34 -0400 Received: by mail-yb1-f201.google.com with SMTP id 15so929360ybj.12 for ; Wed, 21 Aug 2019 00:57:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=SfY5XRW311zdC5RUZv3f1YyeJJxz4XjcRlTY+ZjAHvc=; b=fWI4uwOOZULs38dJ/e4/Rov0rnXIpdgH46de98nsV/ACBXN1r1TbY8E4Nd7KuoWjBH g6wf7ZEj1i06r6eNeZEXyNidpiodgNdKwMma2Iiu4iwalBguttIU91udt3U+LY/0vK5L dN4xXQSkXRPxlGv8vodUe3SK3sWdv5m/q15C/L/5mient8PcVeiKuJJ8qXFDITGBo1Gq R4sBj7cqy9OvvTUGuvriaDdR5KlQKPWtTGVGv2Bxq41P48wo5toxF2doQ2uIMfkfe5Vg MB6ZUENCkq11qGTZvWQAIrwQi7QdqCSPirn78ushHpBMIYlxbXL7mZ3P3P9VEgIICuSC zhaA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=SfY5XRW311zdC5RUZv3f1YyeJJxz4XjcRlTY+ZjAHvc=; b=WQeRsdFx0UokufeDZQpbkatKmv2zznTy5Trz6S/uKZwhBEkBOQ54qERpsXXeI6CWcw 6VNpvBNVfa7ufvyFLCDFMGQbjnhi66jA0kEky8hRTmywSUSZI1pds7J7Jy0zi3xTERfX Bp4uAEplm7/A1V6LSLy6SL3yg0sxIHb3IYywee5uHZUWwlOAIfjDK1Xt+I+PYQgCC0ZN DK5QARthRHOff4CdAVv3oH42HMBmzZJ2Cq8pGCfDFlhbUjrhl3gYMGXnYJp7W/EKSr7Q ErafRQmAXuFKBI7HaFg7UhzJkQAr6AsKH9SPy7oP+36xBNyqwpnaYLKIu3UATEl5l9Xu 4ILQ== X-Gm-Message-State: APjAAAXPZZ1ichyOkmAyZt/7sIqFvN559dcaQXcDSMnF8+O9Czdhd35e g8PlYeLN1iUWwAaYzmawiDPRnaCJ9Ok= X-Google-Smtp-Source: APXvYqxis6xCLsHhX8VMjHW7pKCBcr3N5pGkoeuirvOMEpcmqSmucQXX36A/XD2uzZlmNEeh88CJW3Uksa0= X-Received: by 2002:a81:7850:: with SMTP id t77mr170499ywc.129.1566374253554; Wed, 21 Aug 2019 00:57:33 -0700 (PDT) Date: Wed, 21 Aug 2019 00:57:12 -0700 In-Reply-To: <20190821075714.65140-1-satyat@google.com> Message-Id: <20190821075714.65140-7-satyat@google.com> Mime-Version: 1.0 References: <20190821075714.65140-1-satyat@google.com> X-Mailer: git-send-email 2.23.0.rc1.153.gdeed80330f-goog Subject: [PATCH v4 6/8] scsi: ufs: Add inline encryption support to UFS From: Satya Tangirala To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Barani Muthukumaran , Kuohong Wang , Kim Boojin , Satya Tangirala Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Wire up ufshcd.c with the UFS Crypto API, the block layer inline encryption additions and the keyslot manager. Signed-off-by: Satya Tangirala --- drivers/scsi/ufs/ufshcd.c | 83 ++++++++++++++++++++++++++++++++++++--- drivers/scsi/ufs/ufshcd.h | 6 +++ 2 files changed, 84 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 212f7653c4c5..dcb841c6be7e 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -47,6 +47,7 @@ #include "unipro.h" #include "ufs-sysfs.h" #include "ufs_bsg.h" +#include "ufshcd-crypto.h" #define CREATE_TRACE_POINTS #include @@ -855,7 +856,14 @@ static void ufshcd_enable_run_stop_reg(struct ufs_hba *hba) */ static inline void ufshcd_hba_start(struct ufs_hba *hba) { - ufshcd_writel(hba, CONTROLLER_ENABLE, REG_CONTROLLER_ENABLE); + u32 val = CONTROLLER_ENABLE; + + if (ufshcd_hba_is_crypto_supported(hba)) { + ufshcd_crypto_enable(hba); + val |= CRYPTO_GENERAL_ENABLE; + } + + ufshcd_writel(hba, val, REG_CONTROLLER_ENABLE); } /** @@ -2209,9 +2217,21 @@ static void ufshcd_prepare_req_desc_hdr(struct ufshcd_lrb *lrbp, dword_0 |= UTP_REQ_DESC_INT_CMD; /* Transfer request descriptor header fields */ + if (lrbp->crypto_enable) { + dword_0 |= UTP_REQ_DESC_CRYPTO_ENABLE_CMD; + dword_0 |= lrbp->crypto_key_slot; + req_desc->header.dword_1 = + cpu_to_le32((u32)lrbp->data_unit_num); + req_desc->header.dword_3 = + cpu_to_le32((u32)(lrbp->data_unit_num >> 32)); + } else { + /* dword_1 and dword_3 are reserved, hence they are set to 0 */ + req_desc->header.dword_1 = 0; + req_desc->header.dword_3 = 0; + } + req_desc->header.dword_0 = cpu_to_le32(dword_0); - /* dword_1 is reserved, hence it is set to 0 */ - req_desc->header.dword_1 = 0; + /* * assigning invalid value for command status. Controller * updates OCS on command completion, with the command @@ -2219,8 +2239,6 @@ static void ufshcd_prepare_req_desc_hdr(struct ufshcd_lrb *lrbp, */ req_desc->header.dword_2 = cpu_to_le32(OCS_INVALID_COMMAND_STATUS); - /* dword_3 is reserved, hence it is set to 0 */ - req_desc->header.dword_3 = 0; req_desc->prd_table_length = 0; } @@ -2380,6 +2398,37 @@ static inline u16 ufshcd_upiu_wlun_to_scsi_wlun(u8 upiu_wlun_id) return (upiu_wlun_id & ~UFS_UPIU_WLUN_ID) | SCSI_W_LUN_BASE; } +static inline int ufshcd_prepare_lrbp_crypto(struct ufs_hba *hba, + struct scsi_cmnd *cmd, + struct ufshcd_lrb *lrbp) +{ + int key_slot; + + if (!cmd->request->bio || + !bio_crypt_should_process(cmd->request->bio, cmd->request->q)) { + lrbp->crypto_enable = false; + return 0; + } + + if (WARN_ON(!ufshcd_is_crypto_enabled(hba))) { + /* + * Upper layer asked us to do inline encryption + * but that isn't enabled, so we fail this request. + */ + return -EINVAL; + } + key_slot = bio_crypt_get_keyslot(cmd->request->bio); + if (!ufshcd_keyslot_valid(hba, key_slot)) + return -EINVAL; + + lrbp->crypto_enable = true; + lrbp->crypto_key_slot = key_slot; + lrbp->data_unit_num = bio_crypt_data_unit_num(cmd->request->bio); + + return 0; +} + + /** * ufshcd_queuecommand - main entry point for SCSI requests * @host: SCSI host pointer @@ -2467,6 +2516,13 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) lrbp->task_tag = tag; lrbp->lun = ufshcd_scsi_to_upiu_lun(cmd->device->lun); lrbp->intr_cmd = !ufshcd_is_intr_aggr_allowed(hba) ? true : false; + + err = ufshcd_prepare_lrbp_crypto(hba, cmd, lrbp); + if (err) { + lrbp->cmd = NULL; + clear_bit_unlock(tag, &hba->lrb_in_use); + goto out; + } lrbp->req_abort_skip = false; ufshcd_comp_scsi_upiu(hba, lrbp); @@ -2500,6 +2556,7 @@ static int ufshcd_compose_dev_cmd(struct ufs_hba *hba, lrbp->task_tag = tag; lrbp->lun = 0; /* device management cmd is not specific to any LUN */ lrbp->intr_cmd = true; /* No interrupt aggregation */ + lrbp->crypto_enable = false; /* No crypto operations */ hba->dev_cmd.type = cmd_type; return ufshcd_comp_devman_upiu(hba, lrbp); @@ -4192,6 +4249,8 @@ static inline void ufshcd_hba_stop(struct ufs_hba *hba, bool can_sleep) { int err; + ufshcd_crypto_disable(hba); + ufshcd_writel(hba, CONTROLLER_DISABLE, REG_CONTROLLER_ENABLE); err = ufshcd_wait_for_register(hba, REG_CONTROLLER_ENABLE, CONTROLLER_ENABLE, CONTROLLER_DISABLE, @@ -4585,8 +4644,12 @@ static int ufshcd_change_queue_depth(struct scsi_device *sdev, int depth) static int ufshcd_slave_configure(struct scsi_device *sdev) { struct request_queue *q = sdev->request_queue; + struct ufs_hba *hba = shost_priv(sdev->host); blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1); + + ufshcd_crypto_setup_rq_keyslot_manager(hba, q); + return 0; } @@ -4597,6 +4660,7 @@ static int ufshcd_slave_configure(struct scsi_device *sdev) static void ufshcd_slave_destroy(struct scsi_device *sdev) { struct ufs_hba *hba; + struct request_queue *q = sdev->request_queue; hba = shost_priv(sdev->host); /* Drop the reference as it won't be needed anymore */ @@ -4607,6 +4671,8 @@ static void ufshcd_slave_destroy(struct scsi_device *sdev) hba->sdev_ufs_device = NULL; spin_unlock_irqrestore(hba->host->host_lock, flags); } + + ufshcd_crypto_destroy_rq_keyslot_manager(hba, q); } /** @@ -8323,6 +8389,13 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) goto exit_gating; } + /* Init crypto */ + err = ufshcd_hba_init_crypto(hba); + if (err) { + dev_err(hba->dev, "crypto setup failed\n"); + goto out_remove_scsi_host; + } + /* Host controller enable */ err = ufshcd_hba_enable(hba); if (err) { diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 34e9849f00f0..c3e1f409e63d 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -167,6 +167,9 @@ struct ufs_pm_lvl_states { * @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation) * @issue_time_stamp: time stamp for debug purposes * @compl_time_stamp: time stamp for statistics + * @crypto_enable: whether or not the request needs inline crypto operations + * @crypto_key_slot: the key slot to use for inline crypto + * @data_unit_num: the data unit number for the first block for inline crypto * @req_abort_skip: skip request abort task flag */ struct ufshcd_lrb { @@ -191,6 +194,9 @@ struct ufshcd_lrb { bool intr_cmd; ktime_t issue_time_stamp; ktime_t compl_time_stamp; + bool crypto_enable; + u8 crypto_key_slot; + u64 data_unit_num; bool req_abort_skip; };