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path: root/drivers/s390/block/dasd_eckd.c
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Diffstat (limited to 'drivers/s390/block/dasd_eckd.c')
-rw-r--r--drivers/s390/block/dasd_eckd.c85
1 files changed, 45 insertions, 40 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 074a0a9d1755..c3e5ad641b0b 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -3783,21 +3783,24 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
struct dasd_block *block,
struct request *req)
{
- unsigned long *idaws;
+ sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
+ unsigned int seg_len, len_to_track_end;
+ unsigned int cidaw, cplength, datasize;
+ sector_t first_trk, last_trk, sectors;
+ struct dasd_eckd_private *base_priv;
struct dasd_device *basedev;
- struct dasd_ccw_req *cqr;
- struct ccw1 *ccw;
struct req_iterator iter;
+ struct dasd_ccw_req *cqr;
+ unsigned int first_offs;
+ unsigned int trkcount;
+ unsigned long *idaws;
+ unsigned int size;
+ unsigned char cmd;
struct bio_vec bv;
+ struct ccw1 *ccw;
+ int use_prefix;
+ void *data;
char *dst;
- unsigned char cmd;
- unsigned int trkcount;
- unsigned int seg_len, len_to_track_end;
- unsigned int first_offs;
- unsigned int cidaw, cplength, datasize;
- sector_t first_trk, last_trk, sectors;
- sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
- unsigned int pfx_datasize;
/*
* raw track access needs to be mutiple of 64k and on 64k boundary
@@ -3815,8 +3818,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
DBF_DEV_EVENT(DBF_ERR, basedev,
"raw write not track aligned (%lu,%lu) req %p",
start_padding_sectors, end_padding_sectors, req);
- cqr = ERR_PTR(-EINVAL);
- goto out;
+ return ERR_PTR(-EINVAL);
}
first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
@@ -3829,10 +3831,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
cmd = DASD_ECKD_CCW_READ_TRACK;
else if (rq_data_dir(req) == WRITE)
cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
- else {
- cqr = ERR_PTR(-EINVAL);
- goto out;
- }
+ else
+ return ERR_PTR(-EINVAL);
/*
* Raw track based I/O needs IDAWs for each page,
@@ -3840,38 +3840,46 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
*/
cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
- /* 1x prefix + one read/write ccw per track */
- cplength = 1 + trkcount;
-
/*
- * struct PFX_eckd_data has up to 2 byte as extended parameter
- * this is needed for write full track and has to be mentioned
- * separately
- * add 8 instead of 2 to keep 8 byte boundary
+ * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
+ * of extended parameter. This is needed for write full track.
*/
- pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
+ base_priv = basedev->private;
+ use_prefix = base_priv->features.feature[8] & 0x01;
+ if (use_prefix) {
+ cplength = 1 + trkcount;
+ size = sizeof(struct PFX_eckd_data) + 2;
+ } else {
+ cplength = 2 + trkcount;
+ size = sizeof(struct DE_eckd_data) +
+ sizeof(struct LRE_eckd_data) + 2;
+ }
+ size = ALIGN(size, 8);
- datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
+ datasize = size + cidaw * sizeof(unsigned long long);
/* Allocate the ccw request. */
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
datasize, startdev);
if (IS_ERR(cqr))
- goto out;
+ return cqr;
+
ccw = cqr->cpaddr;
+ data = cqr->data;
- if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
- basedev, startdev, 1 /* format */, first_offs + 1,
- trkcount, 0, 0) == -EAGAIN) {
- /* Clock not in sync and XRC is enabled.
- * Try again later.
- */
- dasd_sfree_request(cqr, startdev);
- cqr = ERR_PTR(-EAGAIN);
- goto out;
+ if (use_prefix) {
+ prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev,
+ startdev, 1, first_offs + 1, trkcount, 0, 0);
+ } else {
+ define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0);
+ ccw[-1].flags |= CCW_FLAG_CC;
+
+ data += sizeof(struct DE_eckd_data);
+ locate_record_ext(ccw++, data, first_trk, first_offs + 1,
+ trkcount, cmd, basedev, 0, 0);
}
- idaws = (unsigned long *)(cqr->data + pfx_datasize);
+ idaws = (unsigned long *)(cqr->data + size);
len_to_track_end = 0;
if (start_padding_sectors) {
ccw[-1].flags |= CCW_FLAG_CC;
@@ -3921,9 +3929,6 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
cqr->buildclk = get_tod_clock();
cqr->status = DASD_CQR_FILLED;
- if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
- cqr = NULL;
-out:
return cqr;
}