Messages in this thread Patch in this message | | | Subject | Re: [PATCH v1 3/3] scsi: ufs: Utilize Transfer Request List Completion Notification Register | From | Stanley Chu <> | Date | Thu, 3 Jun 2021 10:54:59 +0800 |
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Hi Can,
On Mon, 2021-05-24 at 01:36 -0700, Can Guo wrote: > By reading the UTP Transfer Request List Completion Notification Register, > which is added in UFSHCI Ver 3.0, SW can easily get the compeleted transfer > requests. Thus, SW can get rid of host lock, which is used to synchronize > the tr_doorbell and outstanding_reqs, on transfer requests dispatch and > completion paths. This can further benefit random read/write performance. > > Cc: Stanley Chu <stanley.chu@mediatek.com> > Co-developed-by: Asutosh Das <asutoshd@codeaurora.org> > Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> > Signed-off-by: Can Guo <cang@codeaurora.org>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
> +++ b/drivers/scsi/ufs/ufshci.h > @@ -39,6 +39,7 @@ enum { > REG_UTP_TRANSFER_REQ_DOOR_BELL = 0x58, > REG_UTP_TRANSFER_REQ_LIST_CLEAR = 0x5C, > REG_UTP_TRANSFER_REQ_LIST_RUN_STOP = 0x60, > + REG_UTP_TRANSFER_REQ_LIST_COMPL = 0x64, > REG_UTP_TASK_REQ_LIST_BASE_L = 0x70, > REG_UTP_TASK_REQ_LIST_BASE_H = 0x74, > REG_UTP_TASK_REQ_DOOR_BELL = 0x78,
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