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scsi: scsi_transport_fc: Add a max_bsg_segments field to struct fc_function_template

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ibmvfc only supports a single segment for BSG FC passthrough.  Instead of
having it set a queue limits after creating the BSG queues, add a field so
that the FC transport can set it before allocating the queue.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240409143748.980206-6-hch@lst.de
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2024-04-09 16:37:30 +02:00 committed by Martin K. Petersen
parent afd53a3d85
commit 7eaae991c3
3 changed files with 4 additions and 4 deletions
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5
drivers/scsi/ibmvscsi/ibmvfc.c
View File

@ -5541,8 +5541,6 @@ static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
rport->supported_classes |= FC_COS_CLASS2;
if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000)
rport->supported_classes |= FC_COS_CLASS3;
if (rport->rqst_q)
blk_queue_max_segments(rport->rqst_q, 1);
} else
tgt_dbg(tgt, "rport add failed\n");
spin_unlock_irqrestore(vhost->host->host_lock, flags);
@ -6391,8 +6389,6 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
ibmvfc_init_sub_crqs(vhost);
if (shost_to_fc_host(shost)->rqst_q)
blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
dev_set_drvdata(dev, vhost);
spin_lock(&ibmvfc_driver_lock);
list_add_tail(&vhost->queue, &ibmvfc_head);
@ -6547,6 +6543,7 @@ static struct fc_function_template ibmvfc_transport_functions = {
.get_starget_port_id = ibmvfc_get_starget_port_id,
.show_starget_port_id = 1,
.max_bsg_segments = 1,
.bsg_request = ibmvfc_bsg_request,
.bsg_timeout = ibmvfc_bsg_timeout,
};

2
drivers/scsi/scsi_transport_fc.c
View File

@ -4288,6 +4288,7 @@ fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
snprintf(bsg_name, sizeof(bsg_name),
"fc_host%d", shost->host_no);
scsi_init_limits(shost, &lim);
lim.max_segments = min_not_zero(lim.max_segments, i->f->max_bsg_segments);
q = bsg_setup_queue(dev, bsg_name, &lim, fc_bsg_dispatch,
fc_bsg_job_timeout, i->f->dd_bsg_size);
if (IS_ERR(q)) {
@ -4320,6 +4321,7 @@ fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
return -ENOTSUPP;
scsi_init_limits(shost, &lim);
lim.max_segments = min_not_zero(lim.max_segments, i->f->max_bsg_segments);
q = bsg_setup_queue(dev, dev_name(dev), &lim, fc_bsg_dispatch_prep,
fc_bsg_job_timeout, i->f->dd_bsg_size);
if (IS_ERR(q)) {

1
include/scsi/scsi_transport_fc.h
View File

@ -709,6 +709,7 @@ struct fc_function_template {
int (*vport_delete)(struct fc_vport *);
/* bsg support */
u32 max_bsg_segments;
int (*bsg_request)(struct bsg_job *);
int (*bsg_timeout)(struct bsg_job *);