diff options
Diffstat (limited to 'drivers/s390/block/dasd_diag.c')
| -rw-r--r-- | drivers/s390/block/dasd_diag.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c index e1fe02477ea8..8d4971645cf1 100644 --- a/drivers/s390/block/dasd_diag.c +++ b/drivers/s390/block/dasd_diag.c @@ -615,14 +615,34 @@ dasd_diag_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, "dump sense not available for DIAG data"); } +/* + * Initialize block layer request queue. + */ +static void dasd_diag_setup_blk_queue(struct dasd_block *block) +{ + unsigned int logical_block_size = block->bp_block; + struct request_queue *q = block->request_queue; + int max; + + max = DIAG_MAX_BLOCKS << block->s2b_shift; + blk_queue_flag_set(QUEUE_FLAG_NONROT, q); + q->limits.max_dev_sectors = max; + blk_queue_logical_block_size(q, logical_block_size); + blk_queue_max_hw_sectors(q, max); + blk_queue_max_segments(q, USHRT_MAX); + /* With page sized segments each segment can be translated into one idaw/tidaw */ + blk_queue_max_segment_size(q, PAGE_SIZE); + blk_queue_segment_boundary(q, PAGE_SIZE - 1); +} + static struct dasd_discipline dasd_diag_discipline = { .owner = THIS_MODULE, .name = "DIAG", .ebcname = "DIAG", - .max_blocks = DIAG_MAX_BLOCKS, .check_device = dasd_diag_check_device, .verify_path = dasd_generic_verify_path, .fill_geometry = dasd_diag_fill_geometry, + .setup_blk_queue = dasd_diag_setup_blk_queue, .start_IO = dasd_start_diag, .term_IO = dasd_diag_term_IO, .handle_terminated_request = dasd_diag_handle_terminated_request, |