| Message ID | 1533469196-300-1-git-send-email-avri.altman@wdc.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | scsi: scsi transport for ufs devices | expand |
On Sun, Aug 05, 2018 at 02:39:48PM +0300, Avri Altman wrote: > Here is a proposal to use the scsi transport subsystem to manage > ufs devices. This should superceed previous patches to provide provisioning support through sysfs or configfs, right?
> On Sun, Aug 05, 2018 at 02:39:48PM +0300, Avri Altman wrote: > > Here is a proposal to use the scsi transport subsystem to manage > > ufs devices. > > This should superceed previous patches to provide provisioning > support through sysfs or configfs, right? Yes. Thanks, Avri
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. V1->v2: Use inline functions instead of defines, and ida to obtain the port indices, in scsi_transport_ufs module. Remove the closing data pointer and __packed notation from struct ufs_bsg_{request_reply}. Re-use ufshcd_issue_tm_cmd code - needed another patch for that, and call req_upiu and rsp_upio with their appropriate struct pointers. Use a more appropriate name when checking if enough memory was allocated for write descriptor, and remove redundant goto. Add reference to the spec to explain uic command size. Fix a lot of typos. Avri Altman (8): scsi: Add ufs transport class scsi: ufs: Add ufs-bsg module scsi: ufs: Instantiate a ufs transport if its available scsi: ufs: Add fill task management request scsi: ufs: Allow ufshcd_issue_tm_cmd accept raw task upius 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 | 354 ++++++++++++++++++++++++++++++++++++++ drivers/scsi/ufs/Makefile | 1 + drivers/scsi/ufs/ufs_bsg.c | 291 +++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufs_bsg.h | 75 ++++++++ drivers/scsi/ufs/ufshcd.c | 242 +++++++++++++++++++++++--- drivers/scsi/ufs/ufshcd.h | 6 + include/scsi/scsi_transport_ufs.h | 44 +++++ include/uapi/scsi/scsi_bsg_ufs.h | 56 ++++++ 10 files changed, 1055 insertions(+), 28 deletions(-) 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