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[23.128.96.18]) by mx.google.com with ESMTP id t4si8055505eds.217.2020.06.15.02.11.49; Mon, 15 Jun 2020 02:12:11 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@samsung.com header.s=mail20170921 header.b=sfIRSnc4; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=samsung.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729264AbgFOJII (ORCPT + 99 others); Mon, 15 Jun 2020 05:08:08 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:19760 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729179AbgFOJIH (ORCPT ); Mon, 15 Jun 2020 05:08:07 -0400 Received: from epcas1p4.samsung.com (unknown [182.195.41.48]) by mailout1.samsung.com (KnoxPortal) with ESMTP id 20200615090802epoutp01a8e1d53f55f1510fd54854d447086d9c~YrHPnEMuE2373923739epoutp013 for ; Mon, 15 Jun 2020 09:08:02 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.samsung.com 20200615090802epoutp01a8e1d53f55f1510fd54854d447086d9c~YrHPnEMuE2373923739epoutp013 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1592212082; bh=A8NB0CLbuXOtdBmazu/6YGSOzeS3dMylgqzDWAtRMCQ=; h=Subject:Reply-To:From:To:CC:In-Reply-To:Date:References:From; b=sfIRSnc4kax2OJ5q/r5pyyYxWs9u3tSy8zJfE64L7/KYOdn4A7srC6mgyXM4f/H+H z84vt04CQBB9c6tn6EvmBcSjrilEwUVNDd5DnrKBY2M7DHF+H5JKAFV8Z2N/9leYre BnlE7YD4PY0l3dDWVzzGnKoUSF6KNnMB3Kx8etP4= Received: from epcpadp2 (unknown [182.195.40.12]) by epcas1p2.samsung.com (KnoxPortal) with ESMTP id 20200615090801epcas1p233a4f60cbfa05af4b4275a9a49bb5002~YrHPA799M2386723867epcas1p2j; Mon, 15 Jun 2020 09:08:01 +0000 (GMT) Mime-Version: 1.0 Subject: [RFC PATCH v2 2/5] scsi: ufs: Add UFS-feature layer Reply-To: daejun7.park@samsung.com From: Daejun Park To: Daejun Park , ALIM AKHTAR , "avri.altman@wdc.com" , "jejb@linux.ibm.com" , "martin.petersen@oracle.com" , "asutoshd@codeaurora.org" , "beanhuo@micron.com" , "stanley.chu@mediatek.com" , "cang@codeaurora.org" , "bvanassche@acm.org" , "tomas.winkler@intel.com" CC: "linux-scsi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Sang-yoon Oh , Sung-Jun Park , yongmyung lee , Jinyoung CHOI , Adel Choi , BoRam Shin X-Priority: 3 X-Content-Kind-Code: NORMAL In-Reply-To: <336371513.41592205783606.JavaMail.epsvc@epcpadp2> X-CPGS-Detection: blocking_info_exchange X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <231786897.01592212081335.JavaMail.epsvc@epcpadp2> Date: Mon, 15 Jun 2020 16:23:50 +0900 X-CMS-MailID: 20200615072350epcms2p89c0ebbc5069a5c086621ca0e6a23db35 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: AUTO_CONFIDENTIAL X-CPGSPASS: Y X-CPGSPASS: Y X-Hop-Count: 3 X-CMS-RootMailID: 20200615062708epcms2p19a7fbc051bcd5e843c29dcd58fff4210 References: <336371513.41592205783606.JavaMail.epsvc@epcpadp2> <231786897.01592205482200.JavaMail.epsvc@epcpadp2> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch is adding UFS feature layer to UFS core driver. UFS Driver data structure (struct ufs_hba) =09=E2=94=82 =E2=94=8C--------------=E2=94=90 =E2=94=82 UFS feature =E2=94=82 <-- HPB module =E2=94=82 layer =E2=94=82 <-- other extended feature module =E2=94=94--------------=E2=94=98 Each extended UFS-Feature module has a bus of ufs-ext feature type. The UFS feature layer manages common APIs used by each extended feature module. The APIs are set of UFS Query requests and UFS Vendor commands related to each extended feature module. Other extended features can also be implemented using the proposed APIs. For example, in Write Booster, "prep_fn" can be used to guarantee the lifetime of UFS by updating the amount of write IO. And reset/reset_host/suspend/resume can be used to manage the kernel task for checking lifetime of UFS. The following 6 callback functions have been added to "ufshcd.c". prep_fn: called after construct upiu structure reset: called after proving hba reset_host: called before ufshcd_host_reset_and_restore suspend: called before ufshcd_suspend resume: called after ufshcd_resume rsp_upiu: called in ufshcd_transfer_rsp_status with SAM_STAT_GOOD state Signed-off-by: Daejun Park --- drivers/scsi/ufs/Makefile | 2 +- drivers/scsi/ufs/ufsfeature.c | 148 ++++++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufsfeature.h | 69 ++++++++++++++++ drivers/scsi/ufs/ufshcd.c | 17 ++++ drivers/scsi/ufs/ufshcd.h | 3 + 5 files changed, 238 insertions(+), 1 deletion(-) create mode 100644 drivers/scsi/ufs/ufsfeature.c create mode 100644 drivers/scsi/ufs/ufsfeature.h diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile index 94c6c5d7334b..fe3a92b06c87 100644 --- a/drivers/scsi/ufs/Makefile +++ b/drivers/scsi/ufs/Makefile @@ -5,7 +5,7 @@ obj-$(CONFIG_SCSI_UFS_DWC_TC_PLATFORM) +=3D tc-dwc-g210-plt= frm.o ufshcd-dwc.o tc-d obj-$(CONFIG_SCSI_UFS_CDNS_PLATFORM) +=3D cdns-pltfrm.o obj-$(CONFIG_SCSI_UFS_QCOM) +=3D ufs-qcom.o obj-$(CONFIG_SCSI_UFSHCD) +=3D ufshcd-core.o -ufshcd-core-y=09=09=09=09+=3D ufshcd.o ufs-sysfs.o +ufshcd-core-y=09=09=09=09+=3D ufshcd.o ufs-sysfs.o ufsfeature.o ufshcd-core-$(CONFIG_SCSI_UFS_BSG)=09+=3D ufs_bsg.o obj-$(CONFIG_SCSI_UFSHCD_PCI) +=3D ufshcd-pci.o obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) +=3D ufshcd-pltfrm.o diff --git a/drivers/scsi/ufs/ufsfeature.c b/drivers/scsi/ufs/ufsfeature.c new file mode 100644 index 000000000000..94c6be6babd3 --- /dev/null +++ b/drivers/scsi/ufs/ufsfeature.c @@ -0,0 +1,148 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Universal Flash Storage Feature Support + * + * Copyright (C) 2017-2018 Samsung Electronics Co., Ltd. + * + * Authors: + *=09Yongmyung Lee + *=09Jinyoung Choi + */ + +#include "ufshcd.h" +#include "ufsfeature.h" + +inline void ufsf_slave_configure(struct ufs_hba *hba, +=09=09=09=09 struct scsi_device *sdev) +{ +=09/* skip well-known LU */ +=09if (sdev->lun >=3D UFS_UPIU_MAX_UNIT_NUM_ID) +=09=09return; + +=09if (!(hba->dev_info.b_ufs_feature_sup & UFS_DEV_HPB_SUPPORT)) +=09=09return; + +=09atomic_inc(&hba->ufsf.slave_conf_cnt); + +=09wake_up(&hba->ufsf.sdev_wait); +} + +inline void ufsf_ops_prep_fn(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) +{ +=09struct ufshpb_driver *ufshpb_drv; + +=09ufshpb_drv =3D dev_get_drvdata(&hba->ufsf.hpb_dev); + +=09if (ufshpb_drv && ufshpb_drv->ufshpb_ops.prep_fn) +=09=09ufshpb_drv->ufshpb_ops.prep_fn(hba, lrbp); +} + +inline void ufsf_ops_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp= ) +{ +=09struct ufshpb_driver *ufshpb_drv; + +=09ufshpb_drv =3D dev_get_drvdata(&hba->ufsf.hpb_dev); + +=09if (ufshpb_drv && ufshpb_drv->ufshpb_ops.rsp_upiu) +=09=09ufshpb_drv->ufshpb_ops.rsp_upiu(hba, lrbp); +} + +inline void ufsf_ops_reset_host(struct ufs_hba *hba) +{ +=09struct ufshpb_driver *ufshpb_drv; + +=09ufshpb_drv =3D dev_get_drvdata(&hba->ufsf.hpb_dev); + +=09if (ufshpb_drv && ufshpb_drv->ufshpb_ops.reset_host) +=09=09ufshpb_drv->ufshpb_ops.reset_host(hba); +} + +inline void ufsf_ops_reset(struct ufs_hba *hba) +{ +=09struct ufshpb_driver *ufshpb_drv; + +=09ufshpb_drv =3D dev_get_drvdata(&hba->ufsf.hpb_dev); + +=09if (ufshpb_drv && ufshpb_drv->ufshpb_ops.reset) +=09=09ufshpb_drv->ufshpb_ops.reset(hba); +} + +inline void ufsf_ops_suspend(struct ufs_hba *hba) +{ +=09struct ufshpb_driver *ufshpb_drv; + +=09ufshpb_drv =3D dev_get_drvdata(&hba->ufsf.hpb_dev); + +=09if (ufshpb_drv && ufshpb_drv->ufshpb_ops.suspend) +=09=09ufshpb_drv->ufshpb_ops.suspend(hba); +} + +inline void ufsf_ops_resume(struct ufs_hba *hba) +{ +=09struct ufshpb_driver *ufshpb_drv; + +=09ufshpb_drv =3D dev_get_drvdata(&hba->ufsf.hpb_dev); + +=09if (ufshpb_drv && ufshpb_drv->ufshpb_ops.resume) +=09=09ufshpb_drv->ufshpb_ops.resume(hba); +} + +struct device_type ufshpb_dev_type =3D { +=09.name =3D "ufshpb_device" +}; +EXPORT_SYMBOL(ufshpb_dev_type); + +static int ufsf_bus_match(struct device *dev, +=09=09=09 struct device_driver *gendrv) +{ +=09if (dev->type =3D=3D &ufshpb_dev_type) +=09=09return 1; + +=09return 0; +} + +struct bus_type ufsf_bus_type =3D { +=09.name =3D "ufsf_bus", +=09.match =3D ufsf_bus_match, +}; +EXPORT_SYMBOL(ufsf_bus_type); + +static void ufsf_dev_release(struct device *dev) +{ +=09put_device(dev->parent); +} + +void ufsf_scan_features(struct ufs_hba *hba) +{ +=09int ret; + +=09init_waitqueue_head(&hba->ufsf.sdev_wait); +=09atomic_set(&hba->ufsf.slave_conf_cnt, 0); + +=09if (hba->dev_info.wspecversion >=3D HPB_SUPPORTED_VERSION && +=09 (hba->dev_info.b_ufs_feature_sup & UFS_DEV_HPB_SUPPORT)) { +=09=09device_initialize(&hba->ufsf.hpb_dev); + +=09=09hba->ufsf.hpb_dev.bus =3D &ufsf_bus_type; +=09=09hba->ufsf.hpb_dev.type =3D &ufshpb_dev_type; +=09=09hba->ufsf.hpb_dev.parent =3D get_device(hba->dev); +=09=09hba->ufsf.hpb_dev.release =3D ufsf_dev_release; + +=09=09dev_set_name(&hba->ufsf.hpb_dev, "ufshpb"); +=09=09ret =3D device_add(&hba->ufsf.hpb_dev); +=09=09if (ret) +=09=09=09dev_warn(hba->dev, "ufshpb: failed to add device\n"); +=09} +} + +static int __init ufsf_init(void) +{ +=09int ret; + +=09ret =3D bus_register(&ufsf_bus_type); +=09if (ret) +=09=09pr_err("%s bus_register failed\n", __func__); + +=09return ret; +} +device_initcall(ufsf_init); diff --git a/drivers/scsi/ufs/ufsfeature.h b/drivers/scsi/ufs/ufsfeature.h new file mode 100644 index 000000000000..1822d9d8e745 --- /dev/null +++ b/drivers/scsi/ufs/ufsfeature.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Universal Flash Storage Feature Support + * + * Copyright (C) 2017-2018 Samsung Electronics Co., Ltd. + * + * Authors: + *=09Yongmyung Lee + *=09Jinyoung Choi + */ + +#ifndef _UFSFEATURE_H_ +#define _UFSFEATURE_H_ + +#define HPB_SUPPORTED_VERSION=09=09=090x0310 + +struct ufs_hba; +struct ufshcd_lrb; + +/** + * struct ufsf_operation - UFS feature specific callbacks + * @prep_fn: called after construct upiu structure. The prep_fn should wor= k + *=09 properly even if it processes the same SCSI command multiple + *=09 times by requeuing. + * @reset: called after probing hba + * @reset_host: called before ufshcd_host_reset_and_restore + * @suspend: called before ufshcd_suspend + * @resume: called after ufshcd_resume + * @rsp_upiu: called in ufshcd_transfer_rsp_status with SAM_STAT_GOOD stat= e + */ +struct ufsf_operation { +=09void (*prep_fn)(struct ufs_hba *hba, struct ufshcd_lrb *lrbp); +=09void (*reset)(struct ufs_hba *hba); +=09void (*reset_host)(struct ufs_hba *hba); +=09void (*suspend)(struct ufs_hba *hba); +=09void (*resume)(struct ufs_hba *hba); +=09void (*rsp_upiu)(struct ufs_hba *hba, struct ufshcd_lrb *lrbp); +}; + +struct ufshpb_driver { +=09struct device_driver drv; +=09struct list_head lh_hpb_lu; + +=09struct ufsf_operation ufshpb_ops; + +=09/* memory management */ +=09struct kmem_cache *ufshpb_mctx_cache; +=09mempool_t *ufshpb_mctx_pool; +=09mempool_t *ufshpb_page_pool; + +=09struct workqueue_struct *ufshpb_wq; +}; + +struct ufsf_feature_info { +=09atomic_t slave_conf_cnt; +=09wait_queue_head_t sdev_wait; +=09struct device hpb_dev; +}; + +void ufsf_slave_configure(struct ufs_hba *hba, struct scsi_device *sdev); +void ufsf_scan_features(struct ufs_hba *hba); +void ufsf_ops_prep_fn(struct ufs_hba *hba, struct ufshcd_lrb *lrbp); +void ufsf_ops_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp); +void ufsf_ops_reset_host(struct ufs_hba *hba); +void ufsf_ops_reset(struct ufs_hba *hba); +void ufsf_ops_suspend(struct ufs_hba *hba); +void ufsf_ops_resume(struct ufs_hba *hba); + +#endif /* End of Header */ diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index ad4fc829cbb2..74849c742c0f 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -2525,6 +2525,8 @@ static int ufshcd_queuecommand(struct Scsi_Host *host= , struct scsi_cmnd *cmd) =20 =09ufshcd_comp_scsi_upiu(hba, lrbp); =20 +=09ufsf_ops_prep_fn(hba, lrbp); + =09err =3D ufshcd_map_sg(hba, lrbp); =09if (err) { =09=09lrbp->cmd =3D NULL; @@ -4645,6 +4647,8 @@ static int ufshcd_slave_configure(struct scsi_device = *sdev) =09struct ufs_hba *hba =3D shost_priv(sdev->host); =09struct request_queue *q =3D sdev->request_queue; =20 +=09ufsf_slave_configure(hba, sdev); + =09blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1); =20 =09if (ufshcd_is_rpm_autosuspend_allowed(hba)) @@ -4765,6 +4769,9 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struc= t ufshcd_lrb *lrbp) =09=09=09=09 */ =09=09=09=09pm_runtime_get_noresume(hba->dev); =09=09=09} + +=09=09=09if (scsi_status =3D=3D SAM_STAT_GOOD) +=09=09=09=09ufsf_ops_rsp_upiu(hba, lrbp); =09=09=09break; =09=09case UPIU_TRANSACTION_REJECT_UPIU: =09=09=09/* TODO: handle Reject UPIU Response */ @@ -6508,6 +6515,8 @@ static int ufshcd_host_reset_and_restore(struct ufs_h= ba *hba) =09 * Stop the host controller and complete the requests =09 * cleared by h/w =09 */ +=09ufsf_ops_reset_host(hba); + =09ufshcd_hba_stop(hba); =20 =09spin_lock_irqsave(hba->host->host_lock, flags); @@ -6934,6 +6943,7 @@ static int ufs_get_device_desc(struct ufs_hba *hba) =09/* getting Specification Version in big endian format */ =09dev_info->wspecversion =3D desc_buf[DEVICE_DESC_PARAM_SPEC_VER] << 8 | =09=09=09=09 desc_buf[DEVICE_DESC_PARAM_SPEC_VER + 1]; +=09dev_info->b_ufs_feature_sup =3D desc_buf[DEVICE_DESC_PARAM_UFS_FEAT]; =20 =09model_index =3D desc_buf[DEVICE_DESC_PARAM_PRDCT_NAME]; =20 @@ -7350,6 +7360,7 @@ static int ufshcd_add_lus(struct ufs_hba *hba) =09} =20 =09ufs_bsg_probe(hba); +=09ufsf_scan_features(hba); =09scsi_scan_host(hba->host); =09pm_runtime_put_sync(hba->dev); =20 @@ -7438,6 +7449,7 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool= async) =09/* Enable Auto-Hibernate if configured */ =09ufshcd_auto_hibern8_enable(hba); =20 +=09ufsf_ops_reset(hba); out: =20 =09trace_ufshcd_init(dev_name(hba->dev), ret, @@ -8195,6 +8207,8 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum u= fs_pm_op pm_op) =09=09req_link_state =3D UIC_LINK_OFF_STATE; =09} =20 +=09ufsf_ops_suspend(hba); + =09/* =09 * If we can't transition into any of the low power modes =09 * just gate the clocks. @@ -8316,6 +8330,7 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum u= fs_pm_op pm_op) =09hba->clk_gating.is_suspended =3D false; =09hba->dev_info.b_rpm_dev_flush_capable =3D false; =09ufshcd_release(hba); +=09ufsf_ops_resume(hba); out: =09if (hba->dev_info.b_rpm_dev_flush_capable) { =09=09schedule_delayed_work(&hba->rpm_dev_flush_recheck_work, @@ -8412,6 +8427,8 @@ static int ufshcd_resume(struct ufs_hba *hba, enum uf= s_pm_op pm_op) =09/* Enable Auto-Hibernate if configured */ =09ufshcd_auto_hibern8_enable(hba); =20 +=09ufsf_ops_resume(hba); + =09if (hba->dev_info.b_rpm_dev_flush_capable) { =09=09hba->dev_info.b_rpm_dev_flush_capable =3D false; =09=09cancel_delayed_work(&hba->rpm_dev_flush_recheck_work); diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index bf97d616e597..47866ab722ff 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -71,6 +71,7 @@ #include "ufs.h" #include "ufs_quirks.h" #include "ufshci.h" +#include "ufsfeature.h" =20 #define UFSHCD "ufshcd" #define UFSHCD_DRIVER_VERSION "0.2" @@ -746,6 +747,8 @@ struct ufs_hba { =09bool wb_buf_flush_enabled; =09bool wb_enabled; =09struct delayed_work rpm_dev_flush_recheck_work; + +=09struct ufsf_feature_info ufsf; }; =20 /* Returns true if clocks can be gated. Otherwise false */ --=20 2.17.1