v6 -> v7: - attend CanG's comments - add one more patch to transform set_dirty to iterate_rgn - rebase on Daejun's v32 v5 -> v6: - attend CanG's comments - rebase on Daejun's v29 v4 -> v5: - attend Daejun's comments - Control the number of inflight map requests v3 -> v4: - rebase on Daejun's v25 v2 -> v3: - Attend Greg's and Can's comments - rebase on Daejun's v21 v1 -> v2: - attend Greg's and Daejun's comments - add patch 9 making host mode parameters configurable - rebase on Daejun's v19 The HPB spec defines 2 control modes - device control mode and host control mode. In oppose to device control mode, in which the host obey to whatever recommendation received from the device - In host control mode, the host uses its own algorithms to decide which regions should be activated or inactivated. We kept the host managed heuristic simple and concise. Aside from adding a by-spec functionality, host control mode entails some further potential benefits: makes the hpb logic transparent and readable, while allow tuning / scaling its various parameters, and utilize system-wide info to optimize HPB potential. This series is based on Samsung's V32 device-control HPB2.0 driver This version was tested on Galaxy S20, and Xiaomi Mi10 pro. Your meticulous review and testing is mostly welcome and appreciated. Thanks, Avri Avri Altman (11): scsi: ufshpb: Cache HPB Control mode on init scsi: ufshpb: Add host control mode support to rsp_upiu scsi: ufshpb: Transform set_dirty to iterate_rgn scsi: ufshpb: Add reads counter scsi: ufshpb: Make eviction depends on region's reads scsi: ufshpb: Region inactivation in host mode scsi: ufshpb: Add hpb dev reset response scsi: ufshpb: Add "Cold" regions timer scsi: ufshpb: Limit the number of inflight map requests scsi: ufshpb: Add support for host control mode scsi: ufshpb: Make host mode parameters configurable Documentation/ABI/testing/sysfs-driver-ufs | 84 ++- drivers/scsi/ufs/ufshcd.h | 2 + drivers/scsi/ufs/ufshpb.c | 568 ++++++++++++++++++++- drivers/scsi/ufs/ufshpb.h | 44 ++ 4 files changed, 663 insertions(+), 35 deletions(-) -- 2.25.1
