static inline int ll_new_hw_segment(struct request_queue *q,
struct request *req,
struct bio *bio)
{
int nr_phys_segs = bio_phys_segments(q, bio);
if (req->nr_phys_segments + nr_phys_segs > queue_max_segments(q))
goto no_merge;
if (blk_integrity_merge_bio(q, req, bio) == false)
goto no_merge;
/*
* This will form the start of a new hw segment. Bump both
* counters.
*/
req->nr_phys_segments += nr_phys_segs;
return 1;
no_merge:
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
return 0;
}
static int null_lnvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
{
struct request_queue *q = dev->q;
struct request *rq;
struct bio *bio = rqd->bio;
rq = blk_mq_alloc_request(q, bio_data_dir(bio), 0);
if (IS_ERR(rq))
return -ENOMEM;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq->__sector = bio->bi_iter.bi_sector;
rq->ioprio = bio_prio(bio);
if (bio_has_data(bio))
rq->nr_phys_segments = bio_phys_segments(q, bio);
rq->__data_len = bio->bi_iter.bi_size;
rq->bio = rq->biotail = bio;
rq->end_io_data = rqd;
blk_execute_rq_nowait(q, NULL, rq, 0, null_lnvm_end_io);
return 0;
}
static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
{
struct request_queue *q = dev->q;
struct nvme_ns *ns = q->queuedata;
struct request *rq;
struct bio *bio = rqd->bio;
struct nvme_nvm_command *cmd;
rq = blk_mq_alloc_request(q, bio_data_dir(bio), 0);
if (IS_ERR(rq))
return -ENOMEM;
cmd = kzalloc(sizeof(struct nvme_nvm_command) +
sizeof(struct nvme_nvm_completion), GFP_KERNEL);
if (!cmd) {
blk_mq_free_request(rq);
return -ENOMEM;
}
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq->ioprio = bio_prio(bio);
if (bio_has_data(bio))
rq->nr_phys_segments = bio_phys_segments(q, bio);
rq->__data_len = bio->bi_iter.bi_size;
rq->bio = rq->biotail = bio;
nvme_nvm_rqtocmd(rq, rqd, ns, cmd);
rq->cmd = (unsigned char *)cmd;
rq->cmd_len = sizeof(struct nvme_nvm_command);
rq->special = cmd + 1;
rq->end_io_data = rqd;
blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io);
return 0;
}