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;
IronPort-SDR: naKEzHOxExTgvEFR4hMpXAfv3aWBb06T+qLRvj0xB6EXH/TkX8Se7K7feEWsd2YVF5EcRXpG0D
 xss2mwHD8K3iH/Inn5TK2la815aQWAi0HdJdgdkvpE/A32NqaWEwipbFaUTt8zP5K6EZ3URks1
 m6fS5sSyN87q290xmfz+6UzZY4ZV41XmUschyjn2fDAX/E7Wvzm/26UkKFOvJ+v6st5gyK5jtf
 R41PJK7d0IxnM6dFY1x4wMq/yzvx5+OrQjaPeOVR5ReRIoQhljdCJy0Qp7OTzgrSfH2lv3y4jf
 sbQ=
IronPort-SDR: 3rdKSQPJZfOeHE/wZ7k7hZhXs7ygpQe0JEUKxWYRx315tBN0TJrjB+SWSwrE78NcA7MDFg7yR8
 w1xihyRM05+Z0R7GsBUoOJwJs43NeFxLr5x/heb46wWHOCKz4x0WXx0f3YK2tzdK8usboB/fLy
 pIW3+AxZS62rRNUqlacFc07WJrcFlnXvdbgqLvnzH05AQ3xso1kHoOJs0okJoAQc6xNLiL5wB4
 XbvMbuuJo+8gwRpIj+DinsvR3n1YQK161h7yqNHQyAd7orbLA6r9VcV/epVZ5TasK+yV2QwSmC
 APx6kHsbDwXe1NdHOPNCvEY5
IronPort-SDR: 2LL1tBjxvjjVFK+KymTOyqNVzwXZL0wQUWx9hklrQSFsqELG0hTsgKIQ/61HBttDuO9L/A++0a
 t+wVb3lZsI6CHeQ6GU72Oz+MbRrxrA9MA/VE9eb8v5coqXwp8mkv9oWjJAcfa4j3P0LO0zr8Yy
 F68hbEwEQi7AvnYQdGSFOYekJlXpb0AR5pB75htfy6N0RA0EcHUQf44fPp0XBuKXgTSLsToMwK
 duRnzdA/NaOrOuV+/Qo3XrH7O8na+0dvba79FdImp2fjnlQ39PWYG2z+NJdaGLN6Sow451d/1h
 buk=
WDCIronportException: Internal
From:   Avri Altman <avri.altman@wdc.com>
To:     "James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@oracle.com>,
        linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     gregkh@linuxfoundation.org, Bart Van Assche <bvanassche@acm.org>,
        yongmyung lee <ymhungry.lee@samsung.com>,
        Daejun Park <daejun7.park@samsung.com>,
        alim.akhtar@samsung.com, asutoshd@codeaurora.org,
        Zang Leigang <zangleigang@hisilicon.com>,
        Avi Shchislowski <avi.shchislowski@wdc.com>,
        Bean Huo <beanhuo@micron.com>, cang@codeaurora.org,
        stanley.chu@mediatek.com, Avri Altman <avri.altman@wdc.com>
Subject: [PATCH v5 00/10] Add Host control mode to HPB
Date:   Tue,  2 Mar 2021 15:24:53 +0200
Message-Id: <20210302132503.224670-1-avri.altman@wdc.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

v4 -> v5:
 - attend Daejun's comments
 - Control the number of inflight map requests

v3 -> v4:
 - rebase on Daejun's v25

v2 -> v3:
 - Attend Greg's and Can's comments
 - rebase on Daejun's v21

v1 -> v2:
 - attend Greg's and Daejun's comments
 - add patch 9 making host mode parameters configurable
 - rebase on Daejun's v19


The HPB spec defines 2 control modes - device control mode and host
control mode. In oppose to device control mode, in which the host obey
to whatever recommendation received from the device - In host control
mode, the host uses its own algorithms to decide which regions should
be activated or inactivated.

We kept the host managed heuristic simple and concise.

Aside from adding a by-spec functionality, host control mode entails
some further potential benefits: makes the hpb logic transparent and
readable, while allow tuning / scaling its various parameters, and
utilize system-wide info to optimize HPB potential.

This series is based on Samsung's V25 device-control HPB2.0 driver, see
msg-id: 20210226073233epcms2p80fca2dffabea03143a9414838f757633@epcms2p8
in lore.kernel.org.

This version was tested on Galaxy S20, and Xiaomi Mi10 pro.
Your meticulous review and testing is mostly welcome and appreciated.

Thanks,
Avri

Avri Altman (10):
  scsi: ufshpb: Cache HPB Control mode on init
  scsi: ufshpb: Add host control mode support to rsp_upiu
  scsi: ufshpb: Add region's reads counter
  scsi: ufshpb: Make eviction depends on region's reads
  scsi: ufshpb: Region inactivation in host mode
  scsi: ufshpb: Add hpb dev reset response
  scsi: ufshpb: Add "Cold" regions timer
  scsi: ufshpb: Limit the number of inflight map requests
  scsi: ufshpb: Add support for host control mode
  scsi: ufshpb: Make host mode parameters configurable

 Documentation/ABI/testing/sysfs-driver-ufs |  74 +++
 drivers/scsi/ufs/ufshcd.h                  |   2 +
 drivers/scsi/ufs/ufshpb.c                  | 555 ++++++++++++++++++++-
 drivers/scsi/ufs/ufshpb.h                  |  39 ++
 4 files changed, 646 insertions(+), 24 deletions(-)

-- 
2.25.1