2012/2/5 Namjae Jeon <linkinjeon@xxxxxxxxx>: > 2012/2/2 Vinayak Holikatti <vinholikatti@xxxxxxxxx>: >> From: Santosh Yaraganavi <santoshsy@xxxxxxxxx> >> >> 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. >> Hi. Santosh. Would you share performance measurement result (read/write seq,ran) ? Thanks. >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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