[PATCH 04/29] ibmvfc: initialize NVMe channel configuration during driver probe

[Tyrel Datwyler <tyreld@linux.ibm.com>]

Initialize the host's NVMe channel-group state during probe.

Set up the NVMe channel list head, desired queue count, maximum queue
count, protocol identifier, and enablement state alongside the existing
SCSI channel-group initialization in ibmvfc_probe().

This prepares the driver with a NVMe/FC channel group that can will be
used by later patches for NVMe queue allocation, discovery buffers,
target management, and IO submission.

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
---
 drivers/scsi/ibmvscsi/ibmvfc-core.c | 8 +++++++-
 drivers/scsi/ibmvscsi/ibmvfc.h      | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc-core.c b/drivers/scsi/ibmvscsi/ibmvfc-core.c
index 4e45d23221d6..5732ccf2ac1c 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc-core.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc-core.c
@@ -6337,7 +6337,8 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 	struct device *dev = &vdev->dev;
 	int rc = -ENOMEM;
 	unsigned int online_cpus = num_online_cpus();
-	unsigned int max_scsi_queues = min((unsigned int)IBMVFC_MAX_SCSI_QUEUES, online_cpus);
+	unsigned int max_scsi_queues = min_t(unsigned int, IBMVFC_MAX_SCSI_QUEUES, online_cpus);
+	unsigned int max_nvme_queues = min_t(unsigned int, IBMVFC_MAX_NVME_QUEUES, online_cpus);
 
 	ENTER;
 	shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
@@ -6357,6 +6358,7 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 
 	vhost = shost_priv(shost);
 	INIT_LIST_HEAD(&vhost->scsi_scrqs.targets);
+	INIT_LIST_HEAD(&vhost->nvme_scrqs.targets);
 	INIT_LIST_HEAD(&vhost->purge);
 	sprintf(vhost->name, IBMVFC_NAME);
 	vhost->host = shost;
@@ -6371,6 +6373,10 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 	vhost->scsi_scrqs.protocol = IBMVFC_PROTO_SCSI;
 	vhost->using_channels = 0;
 	vhost->do_enquiry = 1;
+	vhost->nvme_enabled = mq_enabled ? nvme_enabled : 0;
+	vhost->nvme_scrqs.desired_queues = min(max_nvme_queues, nr_nvme_channels);
+	vhost->nvme_scrqs.max_queues = max_nvme_queues;
+	vhost->nvme_scrqs.protocol = IBMVFC_PROTO_NVME;
 	vhost->scan_timeout = 0;
 
 	strcpy(vhost->partition_name, "UNKNOWN");
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h
index f137b61ce422..01c49d81b135 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.h
+++ b/drivers/scsi/ibmvscsi/ibmvfc.h
@@ -970,6 +970,7 @@ struct ibmvfc_host {
 	struct ibmvfc_queue crq;
 	struct ibmvfc_queue async_crq;
 	struct ibmvfc_channels scsi_scrqs;
+	struct ibmvfc_channels nvme_scrqs;
 	struct ibmvfc_npiv_login login_info;
 	union ibmvfc_npiv_login_data *login_buf;
 	dma_addr_t login_buf_dma;
-- 
2.54.0