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Diffstat (limited to 'Documentation/scsi/ufs.txt')
| -rw-r--r-- | Documentation/scsi/ufs.txt | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/scsi/ufs.txt b/Documentation/scsi/ufs.txt index 520b5b033256..1769f71c4c20 100644 --- a/Documentation/scsi/ufs.txt +++ b/Documentation/scsi/ufs.txt @@ -147,6 +147,17 @@ send SG_IO with the applicable sg_io_v4: io_hdr_v4.max_response_len = reply_len; io_hdr_v4.request_len = request_len; io_hdr_v4.request = (__u64)request_upiu; + if (dir == SG_DXFER_TO_DEV) { + io_hdr_v4.dout_xfer_len = (uint32_t)byte_cnt; + io_hdr_v4.dout_xferp = (uintptr_t)(__u64)buff; + } else { + io_hdr_v4.din_xfer_len = (uint32_t)byte_cnt; + io_hdr_v4.din_xferp = (uintptr_t)(__u64)buff; + } + +If you wish to read or write a descriptor, use the appropriate xferp of +sg_io_v4. + UFS Specifications can be found at, UFS - http://www.jedec.org/sites/default/files/docs/JESD220.pdf |