From: FUJITA Tomonori Date: Sun, 29 Jul 2007 14:00:46 +0000 (+0900) Subject: [SCSI] bsg: update sg_io_v4 structure X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=0c6a89ba640d28e1dcd7fd1a217d2cfb92ae4953;p=openwrt%2Fstaging%2Fblogic.git [SCSI] bsg: update sg_io_v4 structure This updates sg_io_v4 structure (based on Doug's RFC, release 1.3). The major changes are: - add dout_resid field - increase tag size to 64 bits to comply with SAM-4 and SRP - add dout_iovec_count and din_iovec_count dout_iovec_count and din_iovec_count aren't supported now. I'm not sure whether they will be supported or not but they were added for the possible future changes. Signed-off-by: FUJITA Tomonori Signed-off-by: James Bottomley --- diff --git a/block/bsg.c b/block/bsg.c index d60eee549405..ed2646827234 100644 --- a/block/bsg.c +++ b/block/bsg.c @@ -1,5 +1,5 @@ /* - * bsg.c - block layer implementation of the sg v3 interface + * bsg.c - block layer implementation of the sg v4 interface * * Copyright (C) 2004 Jens Axboe SUSE Labs * Copyright (C) 2004 Peter M. Jones @@ -421,7 +421,6 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr, hdr->info = 0; if (hdr->device_status || hdr->transport_status || hdr->driver_status) hdr->info |= SG_INFO_CHECK; - hdr->din_resid = rq->data_len; hdr->response_len = 0; if (rq->sense_len && hdr->response) { @@ -437,9 +436,14 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr, } if (rq->next_rq) { + hdr->dout_resid = rq->data_len; + hdr->din_resid = rq->next_rq->data_len; blk_rq_unmap_user(bidi_bio); blk_put_request(rq->next_rq); - } + } else if (rq_data_dir(rq) == READ) + hdr->din_resid = rq->data_len; + else + hdr->dout_resid = rq->data_len; blk_rq_unmap_user(bio); blk_put_request(rq); diff --git a/include/linux/bsg.h b/include/linux/bsg.h index 102dc096e1cb..60e377b520f8 100644 --- a/include/linux/bsg.h +++ b/include/linux/bsg.h @@ -15,14 +15,18 @@ struct sg_io_v4 { __u32 request_len; /* [i] in bytes */ __u64 request; /* [i], [*i] {SCSI: cdb} */ + __u64 request_tag; /* [i] {SCSI: task tag (only if flagged)} */ __u32 request_attr; /* [i] {SCSI: task attribute} */ - __u32 request_tag; /* [i] {SCSI: task tag (only if flagged)} */ __u32 request_priority; /* [i] {SCSI: task priority} */ + __u32 request_extra; /* [i] {spare, for padding} */ __u32 max_response_len; /* [i] in bytes */ __u64 response; /* [i], [*o] {SCSI: (auto)sense data} */ - /* "din_" for data in (from device); "dout_" for data out (to device) */ + /* "dout_": data out (to device); "din_": data in (from device) */ + __u32 dout_iovec_count; /* [i] 0 -> "flat" dout transfer else + dout_xfer points to array of iovec */ __u32 dout_xfer_len; /* [i] bytes to be transferred to device */ + __u32 din_iovec_count; /* [i] 0 -> "flat" din transfer */ __u32 din_xfer_len; /* [i] bytes to be transferred from device */ __u64 dout_xferp; /* [i], [*i] */ __u64 din_xferp; /* [i], [*o] */ @@ -39,8 +43,9 @@ struct sg_io_v4 { __u32 info; /* [o] additional information */ __u32 duration; /* [o] time to complete, in milliseconds */ __u32 response_len; /* [o] bytes of response actually written */ - __s32 din_resid; /* [o] actual_din_xfer_len - din_xfer_len */ - __u32 generated_tag; /* [o] {SCSI: task tag that transport chose} */ + __s32 din_resid; /* [o] din_xfer_len - actual_din_xfer_len */ + __s32 dout_resid; /* [o] dout_xfer_len - actual_dout_xfer_len */ + __u64 generated_tag; /* [o] {SCSI: transport generated task tag} */ __u32 spare_out; /* [o] */ __u32 padding;