[PATCH v7 00/11] Add Host control mode to HPB
From: Avri Altman
Date: Wed Mar 31 2021 - 03:40:55 EST
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(-)
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2.25.1