Here is a proposal to use the scsi transport subsystem to manage ufs devices. scsi transport is a framework that allow to send scsi commands to a non-scsi devices. Still, it is flexible enough to allow sending non-scsi commands as well. We will use this framework to manage ufs devices by sending UPIU transactions. We added a new scsi transport module, a ufs-bsg LLD companion, and some new API to the ufs driver. For the time being, we will not use it for data transfer, but just for device management per-se. We are planning to add this capability in the future. We tested it on a Hikey-960 platform with a V4.14 kernel, "modernized" by recent bsg and ufs patches. We also used a htc11 with a V4.4 kernel, but needed much more transport/bsg/ufs patches to make it relevant. Avri Altman (6): scsi: Add ufs transport class scsi: ufs: Add ufs-bsg module scsi: ufs: Instantiate a ufs transport if its available scsi: ufs: Add API to execute raw upiu commands scsi: ufs-bsg: Add support for raw upiu in ufs_bsg_request() scsi: ufs-bsg: Add support for uic commands in ufs_bsg_request() drivers/scsi/Kconfig | 13 ++ drivers/scsi/Makefile | 1 + drivers/scsi/scsi_transport_ufs.c | 337 ++++++++++++++++++++++++++++++++++++++ drivers/scsi/ufs/Makefile | 1 + drivers/scsi/ufs/ufs_bsg.c | 292 +++++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufs_bsg.h | 76 +++++++++ drivers/scsi/ufs/ufshcd.c | 232 ++++++++++++++++++++++++++ drivers/scsi/ufs/ufshcd.h | 4 + include/scsi/scsi_transport_ufs.h | 40 +++++ include/uapi/scsi/scsi_bsg_ufs.h | 56 +++++++ 10 files changed, 1052 insertions(+) create mode 100644 drivers/scsi/scsi_transport_ufs.c create mode 100644 drivers/scsi/ufs/ufs_bsg.c create mode 100644 drivers/scsi/ufs/ufs_bsg.h create mode 100644 include/scsi/scsi_transport_ufs.h create mode 100644 include/uapi/scsi/scsi_bsg_ufs.h -- 1.9.1
