> > This patch is adding UFS feature layer to UFS core driver. > > > > UFS Driver data structure (struct ufs_hba) > > │ > > ┌--------------┐ > > │ UFS feature │ <-- HPB module > > │ layer │ <-- other extended feature module > > └--------------┘ > > Each extended UFS-Feature module has a bus of ufs-ext feature type. > > The UFS feature layer manages common APIs used by each extended feature > > module. The APIs are set of UFS Query requests and UFS Vendor commands > > related to each extended feature module. > > > > Other extended features can also be implemented using the proposed APIs. > > For example, in Write Booster, "prep_fn" can be used to guarantee the > > lifetime of UFS by updating the amount of write IO. > > And reset/reset_host/suspend/resume can be used to manage the kernel task > > for checking lifetime of UFS. > > > > The following 6 callback functions have been added to "ufshcd.c". > > prep_fn: called after construct upiu structure > > reset: called after proving hba > > reset_host: called before ufshcd_host_reset_and_restore > > suspend: called before ufshcd_suspend > > resume: called after ufshcd_resume > > rsp_upiu: called in ufshcd_transfer_rsp_status with SAM_STAT_GOOD state > > > > Signed-off-by: Daejun Park <daejun7.park@xxxxxxxxxxx> > > --- > > drivers/scsi/ufs/Makefile | 2 +- > > drivers/scsi/ufs/ufsfeature.c | 148 ++++++++++++++++++++++++++++++++++ > > drivers/scsi/ufs/ufsfeature.h | 69 ++++++++++++++++ > > drivers/scsi/ufs/ufshcd.c | 17 ++++ > > drivers/scsi/ufs/ufshcd.h | 3 + > > 5 files changed, 238 insertions(+), 1 deletion(-) > > create mode 100644 drivers/scsi/ufs/ufsfeature.c > > create mode 100644 drivers/scsi/ufs/ufsfeature.h > > > > diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile > > index 94c6c5d7334b..fe3a92b06c87 100644 > > --- a/drivers/scsi/ufs/Makefile > > +++ b/drivers/scsi/ufs/Makefile > > @@ -5,7 +5,7 @@ obj-$(CONFIG_SCSI_UFS_DWC_TC_PLATFORM) += tc-dwc- > > g210-pltfrm.o ufshcd-dwc.o tc-d > > obj-$(CONFIG_SCSI_UFS_CDNS_PLATFORM) += cdns-pltfrm.o > > obj-$(CONFIG_SCSI_UFS_QCOM) += ufs-qcom.o > > obj-$(CONFIG_SCSI_UFSHCD) += ufshcd-core.o > > -ufshcd-core-y += ufshcd.o ufs-sysfs.o > > +ufshcd-core-y += ufshcd.o ufs-sysfs.o ufsfeature.o > How about making it > > ufshcd-core-$(CONFIG_UFS_FEATURES) += ufsfeature.o > So that you won't check none-hpb driver on every response etc. It's not a big problem because it only needs a simple checking. In addition, I think that it is not necessary to separate them because the UFS feature is enabled in most of the user cases. Thanks, Daejun
