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From: Chanho Park <chanho61.park@samsung.com>
To: Krzysztof Kozlowski <krzk@kernel.org>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	"James E . J . Bottomley" <jejb@linux.ibm.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>
Cc: Can Guo <cang@codeaurora.org>, Jaegeuk Kim <jaegeuk@kernel.org>,
	Kiwoong Kim <kwmad.kim@samsung.com>,
	Avri Altman <avri.altman@wdc.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Christoph Hellwig <hch@infradead.org>,
	Bart Van Assche <bvanassche@acm.org>,
	jongmin jeong <jjmin.jeong@samsung.com>,
	Gyunghoon Kwon <goodjob.kwon@samsung.com>,
	linux-samsung-soc@vger.kernel.org, linux-scsi@vger.kernel.org,
	Chanho Park <chanho61.park@samsung.com>
Subject: [PATCH v2 00/15] introduce exynosauto v9 ufs driver
Date: Wed, 14 Jul 2021 16:11:16 +0900	[thread overview]
Message-ID: <20210714071131.101204-1-chanho61.park@samsung.com> (raw)
In-Reply-To: <CGME20210714071158epcas2p1a7b98fd67b9bcaaa634e59fc224761b1@epcas2p1.samsung.com>

In ExynosAuto(variant of the Exynos for automotive), the UFS Storage needs
to be accessed from multi-OS. To increase IO performance and reduce SW
complexity, we implemented UFS-IOV to support storage IO virtualization
feature on UFS.

IO virtualization increases IO performance and reduce SW complexity
with small area cost. And IO virtualization supports virtual machine
isolation for Security and Safety which are requested by Multi-OS system
such as automotive application.

Below figure is the conception of UFS-IOV architeture.

    +------+          +------+
    | OS#1 |          | OS#2 |
    +------+          +------+
       |                 |
 +------------+     +------------+
 |  Physical  |     |   Virtual  |
 |    Host    |     |    Host    |
 +------------+     +------------+
   |      |              | <-- UTP_CMD_SAP, UTP_TM_SAP
   |   +-------------------------+
   |   |    Function Arbitor     |
   |   +-------------------------+
 +-------------------------------+
 |           UTP Layer           |
 +-------------------------------+
 +-------------------------------+
 |           UIC Layer           |
 +-------------------------------+

There are two types of host controllers on the UFS host controller
that we designed.
The UFS device has a Function Arbitor that arranges commands of each host.
When each host transmits a command to the Arbitor, the Arbitor transmits it
to the UTP layer.
Physical Host(PH) support all UFSHCI functions(all SAPs) same as
conventional UFSHCI.
Virtual Host(VH) support only data transfer function(UTP_CMD_SAP and
UTP_TM_SAP).

In an environment where multiple OSs are used, the OS that has the
leadership of the system is called System OS(Dom0). This system OS uses
PH and controls error handling.

Since VH can only use less functions than PH, it is necessary to send a
request to PH for Detected Error Handling in VH. To interface among PH
and VHs, UFSHCI HW supports mailbox. PH can broadcast mail to other VH at
the same time with arguments and VH can mail to PH with arguments.
PH and VH generate interrupts when mails from PH or VH.

In this structure, the virtual host can't support some feature and need
to skip the some part of ufshcd code by using quirk.
This patchs add quirks so that the UIC command is ignored and the ufshcd
init process can be skipped for VH. Also, according to our UFS-IOV policy,

First two patches, I picked them up from Jonmin's patchset[1] and the third
patch has been dropped because we need to check it again.

[1]: https://lore.kernel.org/linux-scsi/20210527030901.88403-1-jjmin.jeong@samsung.com/

Patch 0003 ~ 0012, they are changes of exynos7 ufs driver to apply
exynosauto v9 variant and PH/VH capabilities.
Patch 0013 ~ 0015, they introduce exynosauto v9 ufs MHCI which includes
PH and VH.

Changes from v1:
- Change quirk name from UFSHCD_QUIRK_SKIP_INTERFACE_CONFIGURATION to
  UFSHCD_QUIRK_SKIP_PH_CONFIGURATION
- Add compatibles to Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml
  on top of https://lore.kernel.org/linux-scsi/20200613024706.27975-9-alim.akhtar@samsung.com/

Chanho Park (13):
  scsi: ufs: ufs-exynos: change pclk available max value
  scsi: ufs: ufs-exynos: simplify drv_data retrieval
  scsi: ufs: ufs-exynos: get sysreg regmap for io-coherency
  scsi: ufs: ufs-exynos: add refclkout_stop control
  scsi: ufs: ufs-exynos: add setup_clocks callback
  scsi: ufs: ufs-exynos: correct timeout value setting registers
  scsi: ufs: ufs-exynos: support custom version of ufs_hba_variant_ops
  scsi: ufs: ufs-exynos: add EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR option
  scsi: ufs: ufs-exynos: factor out priv data init
  scsi: ufs: ufs-exynos: add pre/post_hce_enable drv callbacks
  scsi: ufs: ufs-exynos: support exynosauto v9 ufs driver
  scsi: ufs: ufs-exynos: multi-host configuration for exynosauto
  scsi: ufs: ufs-exynos: introduce exynosauto v9 virtual host

jongmin jeong (2):
  scsi: ufs: add quirk to handle broken UIC command
  scsi: ufs: add quirk to enable host controller without ph
    configuration

 .../bindings/ufs/samsung,exynos-ufs.yaml      |   7 +
 drivers/scsi/ufs/ufs-exynos.c                 | 318 ++++++++++++++++--
 drivers/scsi/ufs/ufs-exynos.h                 |  10 +-
 drivers/scsi/ufs/ufshcd.c                     |   6 +
 drivers/scsi/ufs/ufshcd.h                     |  12 +
 5 files changed, 327 insertions(+), 26 deletions(-)

-- 
2.32.0


       reply	other threads:[~2021-07-14  7:12 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20210714071158epcas2p1a7b98fd67b9bcaaa634e59fc224761b1@epcas2p1.samsung.com>
2021-07-14  7:11 ` Chanho Park [this message]
     [not found]   ` <CGME20210714071158epcas2p261e6c9157056fafca0f55aaf05cd68ef@epcas2p2.samsung.com>
2021-07-14  7:11     ` [PATCH v2 01/15] scsi: ufs: add quirk to handle broken UIC command Chanho Park
     [not found]   ` <CGME20210714071158epcas2p29900b577a489b760a1e67eba976fb815@epcas2p2.samsung.com>
2021-07-14  7:11     ` [PATCH v2 02/15] scsi: ufs: add quirk to enable host controller without ph configuration Chanho Park
     [not found]   ` <CGME20210714071159epcas2p36dc12e150a84ef4fa2516bc98169725b@epcas2p3.samsung.com>
2021-07-14  7:11     ` [PATCH v2 03/15] scsi: ufs: ufs-exynos: change pclk available max value Chanho Park
     [not found]   ` <CGME20210714071159epcas2p3fa23ac2a670e1c31deeac1c9332f76fe@epcas2p3.samsung.com>
2021-07-14  7:11     ` [PATCH v2 04/15] scsi: ufs: ufs-exynos: simplify drv_data retrieval Chanho Park
     [not found]   ` <CGME20210714071159epcas2p2ae981fb3b91b0eba23060de5de104ec0@epcas2p2.samsung.com>
2021-07-14  7:11     ` [PATCH v2 05/15] scsi: ufs: ufs-exynos: get sysreg regmap for io-coherency Chanho Park
     [not found]   ` <CGME20210714071159epcas2p3d39f7e5cbd9a2b8addaa496a396213af@epcas2p3.samsung.com>
2021-07-14  7:11     ` [PATCH v2 06/15] scsi: ufs: ufs-exynos: add refclkout_stop control Chanho Park
     [not found]   ` <CGME20210714071159epcas2p4c4eabf50abdaa46567fc5356bce8942b@epcas2p4.samsung.com>
2021-07-14  7:11     ` [PATCH v2 07/15] scsi: ufs: ufs-exynos: add setup_clocks callback Chanho Park
     [not found]   ` <CGME20210714071159epcas2p24b7be0cad31af09bc71c608f9b03fe36@epcas2p2.samsung.com>
2021-07-14  7:11     ` [PATCH v2 08/15] scsi: ufs: ufs-exynos: correct timeout value setting registers Chanho Park
     [not found]   ` <CGME20210714071159epcas2p4edc8104aad36d4d7a5bedb8328c0ab39@epcas2p4.samsung.com>
2021-07-14  7:11     ` [PATCH v2 09/15] scsi: ufs: ufs-exynos: support custom version of ufs_hba_variant_ops Chanho Park
     [not found]   ` <CGME20210714071159epcas2p24323976939fa21a5ed44d81649b33d85@epcas2p2.samsung.com>
2021-07-14  7:11     ` [PATCH v2 10/15] scsi: ufs: ufs-exynos: add EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR option Chanho Park
     [not found]   ` <CGME20210714071159epcas2p176be9a1310f8de27cfb3786fe86630d6@epcas2p1.samsung.com>
2021-07-14  7:11     ` [PATCH v2 11/15] scsi: ufs: ufs-exynos: factor out priv data init Chanho Park
     [not found]   ` <CGME20210714071159epcas2p428292c7d0e97533de65d92a029eece93@epcas2p4.samsung.com>
2021-07-14  7:11     ` [PATCH v2 12/15] scsi: ufs: ufs-exynos: add pre/post_hce_enable drv callbacks Chanho Park
     [not found]   ` <CGME20210714071200epcas2p199f4f7b209e565c9a87440af319acda1@epcas2p1.samsung.com>
2021-07-14  7:11     ` [PATCH v2 13/15] scsi: ufs: ufs-exynos: support exynosauto v9 ufs driver Chanho Park
     [not found]   ` <CGME20210714071200epcas2p3f76e68f6bbb4755574dba2055a8130ab@epcas2p3.samsung.com>
2021-07-14  7:11     ` [PATCH v2 14/15] scsi: ufs: ufs-exynos: multi-host configuration for exynosauto Chanho Park
2021-07-26  9:08       ` Bean Huo
2021-07-26 10:40         ` Chanho Park
2021-07-26 21:58           ` Bean Huo
2021-07-27 10:14             ` Chanho Park
2021-07-27 19:36               ` Bean Huo
2021-07-28  1:39                 ` Chanho Park
2021-07-29 21:10                   ` Bean Huo
2021-07-26 22:06       ` Bean Huo
2021-07-27  9:05         ` Chanho Park
     [not found]   ` <CGME20210714071200epcas2p413ca643dc459ee75ec7e5e4f8a6c05d7@epcas2p4.samsung.com>
2021-07-14  7:11     ` [PATCH v2 15/15] scsi: ufs: ufs-exynos: introduce exynosauto v9 virtual host Chanho Park

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