On 16/07/18 12:43, Sayali Lokhande wrote: > This patch adds configfs support to provision UFS device at > runtime. This feature can be primarily useful in factory or > assembly line as some devices may be required to be configured > multiple times during initial system development phase. > Configuration Descriptors can be written multiple times until > bConfigDescrLock attribute is zero. > > Configuration descriptor buffer consists of Device and Unit > descriptor configurable parameters which are parsed from vendor > specific provisioning file and then passed via configfs node at > runtime to provision ufs device. > CONFIG_CONFIGFS_FS needs to be enabled for using this feature. > > Usage: > 1) To read current configuration descriptor : > cat /config/XXXX.ufshc/ufs_provision > 2) To provision ufs device: > echo <config_desc_buf> > /config/XXXX.ufshc/ufs_provision > > Signed-off-by: Sayali Lokhande <sayalil@xxxxxxxxxxxxxx> > --- > Documentation/ABI/testing/configfs-driver-ufs | 18 +++ > drivers/scsi/ufs/Kconfig | 10 ++ > drivers/scsi/ufs/Makefile | 1 + > drivers/scsi/ufs/ufs-configfs.c | 162 ++++++++++++++++++++++++++ > drivers/scsi/ufs/ufshcd.c | 2 + > drivers/scsi/ufs/ufshcd.h | 19 +++ > 6 files changed, 212 insertions(+) > create mode 100644 Documentation/ABI/testing/configfs-driver-ufs > create mode 100644 drivers/scsi/ufs/ufs-configfs.c > > diff --git a/Documentation/ABI/testing/configfs-driver-ufs b/Documentation/ABI/testing/configfs-driver-ufs > new file mode 100644 > index 0000000..eeee499c > --- /dev/null > +++ b/Documentation/ABI/testing/configfs-driver-ufs > @@ -0,0 +1,18 @@ > +What: /config/ufshcd/ufs_provision > +Date: Jun 2018 > +KernelVersion: 4.14 > +Description: > + This file shows the current ufs configuration descriptor set in device. > + This can be used to provision ufs device if bConfigDescrLock is 0. > + For more details, refer 14.1.6.3 Configuration Descriptor and > + Table 14-12 - Unit Descriptor configurable parameters from specs for > + description of each configuration descriptor parameter. > + Configuration descriptor buffer needs to be passed in space separated > + format specificied as below: > + echo <bLength> <bDescriptorIDN> <bConfDescContinue> <bBootEnable> > + <bDescrAccessEn> <bInitPowerMode> <bHighPriorityLUN> > + <bSecureRemovalType> <bInitActiveICCLevel> <wPeriodicRTCUpdate> > + <0Bh:0Fh_ReservedAs_0> <bLUEnable> <bBootLunID> <bLUWriteProtect> > + <bMemoryType> <dNumAllocUnits> <bDataReliability> <bLogicalBlockSize> > + <bProvisioningType> <wContextCapabilities> <0Dh:0Fh_ReservedAs_0> > + > /config/XXXX.ufshc/ufs_provision > diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig > index e27b4d4..34d89c2 100644 > --- a/drivers/scsi/ufs/Kconfig > +++ b/drivers/scsi/ufs/Kconfig > @@ -100,3 +100,13 @@ config SCSI_UFS_QCOM > > Select this if you have UFS controller on QCOM chipset. > If unsure, say N. > + > +config UFS_PROVISION > + tristate "Runtime UFS Provisioning support" > + depends on SCSI_UFSHCD_PLATFORM && CONFIGFS_FS Why SCSI_UFSHCD_PLATFORM instead of SCSI_UFSHCD? Also please cc me in future revisions.
