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    SubjectRe: [PATCH 0/4] [SCSI] ufshcd: UFS Host Controller Driver
    From
    2012/2/2 Vinayak Holikatti <vinholikatti@gmail.com>:
    > From: Santosh Yaraganavi <santoshsy@gmail.com>
    >
    > UFS is designed to be the most advanced specification for
    > both embedded and removable flash memory-based storage in mobile devices
    > such as smart phones and tablet computers.  The UFS standard represents
    > an evolutionary progression of JEDEC standards in this field, and has been
    > specifically tailored for mobile applications and computing systems requiring
    > high performance and low power consumption.  The initial data throughput for
    > UFS will be ~300 megabytes per second (MB/s), and the standard also supports
    > command queuing features to raise random read/write speeds.
    >
    > To achieve the highest performance and most power efficient data
    > transport, UFS uses the leading industry interface standards to form its
    > Interconnect Layer: MIPI® Alliance’s M-PHY and UniProSM  specifications.
    > UniPro is a comprehensive specification meant to act as a universal
    > chip-to-chip protocol, providing a common tunnel for other protocols.
    > The M-PHY interface is designed as the primary physical interface (PHY layer)
    > for the UniPro specification, and is a high speed serial interface targeting
    > up to 2.9 gigabits per second (Gbps) per lane with up-scalability to 5.8Gbps
    > per lane.
    >
    > MIPI’s M-PHY and UniPro specifications are optimized for mobile applications,
    > and are designed from the ground up for efficient power management in mobile
    > devices, including enabling efficient transitions between the active and power
    > save modes. Combined with a low active power level and a near-zero idle power
    > level, UFS offers the promise for significant reductions in device power
    > consumption.
    >
    > The UFS standard adopts the well-known SCSI Architecture Model and command
    > protocols supporting multiple commands with command queuing features and
    > enabling a multi-thread programming paradigm. This differs from conventional
    > flash-based memory cards and embedded flash solutions which process one
    > command at a time, limiting random read/write access performance.
    > In addition, a forthcoming complementary UFS Host Controller Interface (HCI)
    > specification will allow system designers greater flexibility by simplifying
    > the involvement of the host processor in the operation of the flash storage
    > subsystem. The UFS HCI specification and the adoption of SCSI will provide
    > a well-known software programming model and enable wider market adoption.
    >
    > This patchset contains PCIe based UFS host controller driver which complies
    > to UFSHCI 1.0 and 1.1. The driver is based on Linux SCSI framework.
    > The driver is tested with UFS Host controller(FPGA) and UFS device(FPGA).
    >
    > This patch set is successfully applied on kernel version 3.3-rc2.
    >
    > Santosh Yaraganavi (4):
    >  [SCSI] ufshcd: UFS Host controller driver
    >  [SCSI] ufshcd: UFS UTP Transfer requests handling
    >  [SCSI] ufshcd: UFSHCI error handling
    >  [SCSI] ufshcd: SCSI error handling
    >
    >  drivers/scsi/Kconfig      |    1 +
    >  drivers/scsi/Makefile     |    1 +
    >  drivers/scsi/ufs/Kconfig  |   49 ++
    >  drivers/scsi/ufs/Makefile |    2 +
    >  drivers/scsi/ufs/ufs.h    |  203 +++++
    >  drivers/scsi/ufs/ufshcd.c | 1954 +++++++++++++++++++++++++++++++++++++++++++++
    >  drivers/scsi/ufs/ufshci.h |  360 +++++++++
    >  7 files changed, 2570 insertions(+), 0 deletions(-)
    >  create mode 100644 drivers/scsi/ufs/Kconfig
    >  create mode 100644 drivers/scsi/ufs/Makefile
    >  create mode 100644 drivers/scsi/ufs/ufs.h
    >  create mode 100644 drivers/scsi/ufs/ufshcd.c
    >  create mode 100644 drivers/scsi/ufs/ufshci.h
    >
    > --
    > 1.7.5.4
    Hi.
    I have been waiting for ufs contribution.
    Unfortunately I don't have real target supported ufs(maybe only you
    have it). I can not debug and run this code, So just review only code
    with specification.
    >
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