v9 -> v10: - rebase on Daejun's v36 v8 -> v9: - Add one more patch: do not send unmap_all in host mode - rebase on Daejun's v35 - tested on one more platform - Galaxy S21 v7 -> v8: - restore Daejun atomic argument to ufshpb_get_req (v31) - Add Daejun's Reviewed-by tag 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 device-control HPB2.0 driver This version was tested on Galaxy S21, Galaxy S20, and Xiaomi Mi10 pro. Your meticulous review and testing is mostly welcome and appreciated. Thanks, Avri Avri Altman (12): 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: Do not send umap_all in host control mode scsi: ufshpb: Add support for host control mode scsi: ufshpb: Make host mode parameters configurable Documentation/ABI/testing/sysfs-driver-ufs | 76 ++- drivers/scsi/ufs/ufshcd.h | 2 + drivers/scsi/ufs/ufshpb.c | 582 ++++++++++++++++++++- drivers/scsi/ufs/ufshpb.h | 44 ++ 4 files changed, 675 insertions(+), 29 deletions(-) -- 2.25.1
