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25 embedded and removable flash memory based storage in mobile
26 devices such as smart phones and tablet computers. The specification
29 physical layer and MIPI Unipro as the link layer.
33 For UFS version 1.0 and 1.1 the target performance is as follows,
39 * High random IOPs and low latency
53 Task Manager and Device manager. The UFS interface is designed to be
55 protocol for versions 1.0 and 1.1 of UFS protocol layer.
56 UFS supports subset of SCSI commands defined by SPC-4 and SBC-3.
60 * Device manager: It handles device level operations and device
62 device power management operations and commands to Interconnect
64 requests which are used to modify and retrieve configuration
84 connection between UFS host and UFS device. UIC consists of
85 MIPI UniPro and MIPI M-PHY. UIC provides 2 service access points
87 * UIC_SAP: To transport UPIU between UFS host and UFS device.
96 SCSI Midlayer and PCIe based UFS host controllers.
103 and prepares the controller to transfer commands/response between
104 UFSHCD and UFS device.
109 from SCSI Midlayer, forms UPIUs and issues the UPIUs to UFS Host
111 host controller in the form of UPIUs and intimates the SCSI Midlayer
117 Device fatal errors and UIC interconnect layer related errors.
123 issues by SCSI Midlayer are Abort task, Lun reset and host reset.
125 SCSI Midlayer through .eh_abort_handler, .eh_device_reset_handler and
128 In this version of UFSHCD Query requests and power management