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2018-03-21scsi: ufs: Add support for Auto-Hibernate Idle TimerAdrian Hunter1-0/+7
UFS host controllers may support an autonomous power management feature called the Auto-Hibernate Idle Timer. The timer is set to the number of microseconds of idle time before the UFS host controller will autonomously put the link into Hibernate state. That will save power at the expense of increased latency. Any access to the host controller interface registers will automatically put the link out of Hibernate state. So once configured, the feature is transparent to the driver. Expose the Auto-Hibernate Idle Timer value via SysFS to allow users to choose between power efficiency or lower latency. Set a default value of 150 ms. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Stanislav Nijnikov <stanislav.nijnikov@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-12-04scsi: ufs: add some definitions included in UFS HCI specificationkwmad.kim@samsung.com1-0/+16
These would be used in the future in some specific drivers. Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-10-11scsi: ufs: Remove unused UFS_BIT() macroAlim Akhtar1-2/+0
Since we have converted all the user of UFS_BIT() macro with the actual bit position, let remove unused UFS_BIT()macro. Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-10-11scsi: ufs: Remove unused #definesAlim Akhtar1-2/+0
HOST_ERROR_INDICATOR and DEVICE_ERROR_INDICATOR are not used anywhere. Also as per JESD223C specification, bit[7:4] are reserved. Lets remove these #defines. Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-10-11scsi: ufs: Change HCI macro to actual bit positionAlim Akhtar1-31/+35
Currently UFS HCI uses UFS_BIT() macro to get various bit position for the hardware registers status bits. Which makes code longer instead of shorter. This macro does not improve code readability as well. Lets re-write these macro definition with the actual bit position. Suggested-by: Bart Van Assche <Bart.VanAssche@wdc.com> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-04-26scsi: ufs: make ufshcd_get_lists_status() register operation obviousTomohiro Kusumi1-0/+4
It could be just cmp 0xe instead of >>1 and cmp 0x7, with readable code. Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-29scsi: ufs: add missing macros for register bits from UFSHCI specTomohiro Kusumi1-0/+2
Add macros for register bits that can be found in JESD223C (v2.1). Not all registers are defined in ufshci.h (i.e. some are unused whether macros are defined or undefined), but all the bits for those registers that are already defined should appear here. Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-05scsi: ufs: dump debug info during failuresDolev Raviv1-0/+3
Inserts driver dumps for UFS Host Controller registers, Transfer Requests and Task Management Requests. The dumps will occur on driver initialization failure, ufshcd_abort() and on error handling path. Signed-off-by: Dolev Raviv <draviv@codeaurora.org> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-12-08scsi: ufs: add support for UFS HCI 2.1Yaniv Gardi1-0/+7
The UFS HCI v2.1 includes a few additional registers. This change updates the HCI register, the UFS version register content and the Interrupt Status register. Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-29scsi: ufs: handle errors from PHY_ADAPTER_ERROR registerDolev Raviv1-0/+1
The PHY_ADAPTER_ERROR status register indicates PHY lane errors reported by the M-PHY layer. In some occasions the controller can recover from such errors. When the error is not recoverable, a stuck DB error will occur. Since the stuck DB error is spotted separately, no action other than clearing the register is necessary. Signed-off-by: Dolev Raviv <draviv@codeaurora.org> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: ufs: Add missing UFS_MASK macro definitionSantosh Y1-0/+2
Reported-by: Venkatraman S <svenkatr@ti.com> Reviewed-by: Vinayak Holikatti <vinholikatti@gmail.com> Signed-off-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-07-12ufs: add link status to ufshciJoao Pinto1-0/+6
Add link status to ufshci. Signed-off-by: Joao Pinto <jpinto@synopsys.com> Acked-by: Tomas Winkler <tomas.winkler@intel.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-07-12ufs: add UFS 2.0 capabilitiesJoao Pinto1-0/+5
Add UFS 2.0 support to the UFS core driver. Signed-off-by: Joao Pinto <jpinto@synopsys.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Tomas Winkler <tomas.winkler@intel.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-03-14scsi: ufs: tune UniPro parameters to optimize hibern8 exit timeYaniv Gardi1-0/+2
Optimal values of local UniPro parameters like PA_Hibern8Time & PA_TActivate can help reduce the hibern8 exit latency. If both host and device supports UniPro ver1.6 or later, these parameters will be automatically tuned during link startup itself. But if either host or device doesn't support UniPro ver 1.6 or later, we have to manually tune them. But to keep manual tuning logic simple, we will only do manual tuning if local unipro version doesn't support ver1.6 or later. Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-03-14scsi: ufs: add error recovery after DL NAC errorYaniv Gardi1-0/+2
Some vendor's UFS device sends back to back NACs for the DL data frames causing the host controller to raise the DFES error status. Sometimes such UFS devices send back to back NAC without waiting for new retransmitted DL frame from the host and in such cases it might be possible the Host UniPro goes into bad state without raising the DFES error interrupt. If this happens then all the pending commands would timeout only after respective SW command (which is generally too large). This change workarounds such device behaviour like this: - As soon as SW sees the DL NAC error, it would schedule the error handler - Error handler would sleep for 50ms to see if there any fatal errors raised by UFS controller. - If there are fatal errors then SW does normal error recovery. - If there are no fatal errors then SW sends the NOP command to device to check if link is alive. - If NOP command times out, SW does normal error recovery - If NOP command succeed, skip the error handling. If DL NAC error is seen multiple times with some vendor's UFS devices then enable this quirk to initiate quick error recovery and also silence related error logs to reduce spamming of kernel logs. Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2015-06-02scsi: ufs: add quirk to handle broken UFS HCI versionYaniv Gardi1-2/+3
Some host controller hardware controllers may not advertise correct version in UFS HCI VER register. To workaround this, add new quirk and call the host controller hardware vendor specific callback to get the correct UFS HCI version register value. Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: James Bottomley <JBottomley@Odin.com>
2015-06-02scsi: ufs: provide a quirk to disable the LCCYaniv Gardi1-0/+3
LCC (Line Control Command) are being used for communication between UFS host and UFS device. New commercial UFS devices don't have the issues with LCC processing but UFS host controller might still have the issue with LCC processing, hence, added a routine to disable TX LCC on the device. Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: James Bottomley <JBottomley@Odin.com>
2014-10-01ufs: add UFS power management supportSubhash Jadavani1-3/+6
This patch adds support for UFS device and UniPro link power management during runtime/system PM. Main idea is to define multiple UFS low power levels based on UFS device and UFS link power states. This would allow any specific platform or pci driver to choose the best suited low power level during runtime and system suspend based on their power goals. bkops handlig: To put the UFS device in sleep state when bkops is disabled, first query the bkops status from the device and enable bkops on device only if device needs time to perform the bkops. START_STOP handling: Before sending START_STOP_UNIT to the device well-known logical unit (w-lun) to make sure that the device w-lun unit attention condition is cleared. Write protection: UFS device specification allows LUs to be write protected, either permanently or power on write protected. If any LU is power on write protected and if the card is power cycled (by powering off VCCQ and/or VCC rails), LU's write protect status would be lost. So this means those LUs can be written now. To ensures that UFS device is power cycled only if the power on protect is not set for any of the LUs, check if power on write protect is set and if device is in sleep/power-off state & link in inactive state (Hibern8 or OFF state). If none of the Logical Units on UFS device is power on write protected then all UFS device power rails (VCC, VCCQ & VCCQ2) can be turned off if UFS device is in power-off state and UFS link is in OFF state. But current implementation would disable all device power rails even if UFS link is not in OFF state. Low power mode: If UFS link is in OFF state then UFS host controller can be power collapsed to avoid leakage current from it. Note that if UFS host controller is power collapsed, full UFS reinitialization will be required on resume to re-establish the link between host and device. Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Dolev Raviv <draviv@codeaurora.org> Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-07-25ufs: adjust queue settings to PRDT limitationsAkinobu Mita1-0/+5
The data byte count field of PRDT indicates the length of data block which is a segment of data transfer for SCSI commands. The value of this field shall have Dword granularity and the the maximum of length is 256KB. This adjusts dma pad mask and max segment size to the above-mentioned PRDT limitations. Signed-off-by: Akinobu Mita <mita@fixstars.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Tested-by: Dolev Raviv <draviv@codeaurora.org> Acked-by: Vinayak Holikatti <vinholikatti@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-28scsi: ufs: fix endianness sparse warningsSujit Reddy Thumma1-16/+16
Fix many warnings with incorrect endian assumptions which makes the code unportable to new architectures. The UFS specification defines the byte order as big-endian for UPIU structure and little-endian for the host controller transfer/task management descriptors. Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org> Acked-by: Vinayak Holikatti <vinholikatti@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2013-09-06[SCSI] ufs: add operation for the uic power mode changeSeungwon Jeon1-0/+12
Setting PA_PWRMode using DME_SET triggers the power mode change. And then the result will be given by the HCS.UPMCRS. This operation should be done atomically. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Tested-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-09-06[SCSI] ufs: add dme configuration primitivesSeungwon Jeon1-0/+6
Implements to support GET and SET operations of the DME. These operations are used to configure the behavior of the UNIPRO. Along with basic operation, {Peer/AttrSetType} can be mixed. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Tested-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-09-06[SCSI] ufs: fix the setting interrupt aggregation counterSeungwon Jeon1-2/+2
IACTH(Interrupt aggregation counter threshold) value is allowed up to 0x1F and current setting value is the maximum. This value is related with NUTRS(max:0x20) of HCI's capability. Considering HCI controller doesn't support the maximum, IACTH setting should be adjusted with possible value. For that, existing 'ufshcd_config_int_aggr' is split into two part [reset, configure]. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Tested-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-08-26[SCSI] ufs: Set fDeviceInit flag to initiate device initializationDolev Raviv1-1/+1
Allow UFS device to complete its initialization and accept SCSI commands by setting fDeviceInit flag. The device may take time for this operation and hence the host should poll until fDeviceInit flag is toggled to zero. This step is mandated by UFS device specification for device initialization completion. Signed-off-by: Dolev Raviv <draviv@codeaurora.org> Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org> Signed-off-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-06-28[SCSI] ufs: amend interrupt configurationSeungwon Jeon1-2/+3
It makes interrupt setting more flexible especially for disabling. And wrong bit mask is fixed for ver 1.0. [17:16] is added for mask. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Tested-by: Maya Erez <merez@codeaurora.org> Signed-off-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-02-25[SCSI] ufs: Segregate PCI Specific CodeVinayak Holikatti1-27/+17
This patch segregates the PCI specific code in ufshcd.c to make it ready for splitting into core ufs driver and PCI glue driver. Also copyright header modification to remove extra warranty disclaim. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Tested-by: Maya Erez <merez@codeaurora.org> Signed-off-by: Vinayak Holikatti <vinholikatti@gmail.com> Signed-off-by: Santosh Yaraganavi <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-03-27[SCSI] ufshcd: UFS Host controller driverSantosh Yaraganavi1-0/+376
This patch adds support for Universal Flash Storage(UFS) host controllers. The UFS host controller driver includes host controller initialization method. The Initialization process involves following steps: - Initiate UFS Host Controller initialization process by writing to Host controller enable register - Configure UFS Host controller registers with host memory space datastructure offsets. - Unipro link startup procedure - Check for connected device - Configure UFS host controller to process requests - Enable required interrupts - Configure interrupt aggregation [jejb: fix warnings in 32 bit compile] Signed-off-by: Santosh Yaraganavi <santoshsy@gmail.com> Signed-off-by: Vinayak Holikatti <vinholikatti@gmail.com> Reviewed-by: Arnd Bergmann <arnd@linaro.org> Reviewed-by: Vishak G <vishak.g@samsung.com> Reviewed-by: Girish K S <girish.shivananjappa@linaro.org> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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