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scsi: ibmvfc: implement LLDD callbacks for mapping nvme-fc queues

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Implement the NVMe-FC queue create and delete callbacks and map NVMe
controller queues onto ibmvfc hardware queues.

Use qidx of NVMe controller queue to map onto a ibmvfc_queue channel.
The Admin queue is always qidx 0 and general practice among other
drivers is to map both the Admin queue and first IO queue to the same HW
queue. Add a new ibmvfc_nvme_qhandle struct that will be used as the
opaque queue handle by the NVMe-FC layer when issuing fcp IO.

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Link: https://patch.msgid.link/20260723000149.969416-29-tyreld@linux.ibm.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Tyrel Datwyler
2026-07-22 17:01:44 -07:00
committed by Martin K. Petersen
parent 6fac8df932
commit 86e4953580
2 changed files with 43 additions and 2 deletions
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38
drivers/scsi/ibmvscsi/ibmvfc-nvme.c
View File

@@ -28,6 +28,40 @@ static void ibmvfc_nvme_remoteport_delete(struct nvme_fc_remote_port *rport)
complete(&tgt->nvme_delete_done);
}
static int ibmvfc_nvme_create_queue(struct nvme_fc_local_port *lport, unsigned int qidx,
u16 qsize, void **handle)
{
struct ibmvfc_host *vhost = lport->private;
struct ibmvfc_nvme_qhandle *qhandle;
if (!vhost->nvme_scrqs.active_queues)
return -ENODEV;
qhandle = kzalloc_obj(struct ibmvfc_nvme_qhandle);
if (!qhandle)
return -ENOMEM;
qhandle->cpu_id = raw_smp_processor_id();
qhandle->qidx = qidx;
/* Admin and first IO queue are both mapped to index 0 */
if (qidx)
qhandle->index = (qidx - 1) % vhost->nvme_scrqs.active_queues;
else
qhandle->index = qidx;
qhandle->queue = &vhost->nvme_scrqs.scrqs[qhandle->index];
*handle = qhandle;
return 0;
}
static void ibmvfc_nvme_delete_queue(struct nvme_fc_local_port *lport, unsigned int qidx,
void *handle)
{
kfree(handle);
}
static int ibmvfc_nvme_ls_req(struct nvme_fc_local_port *lport,
struct nvme_fc_remote_port *rport,
struct nvmefc_ls_req *ls_req)
@@ -59,8 +93,8 @@ static void ibmvfc_nvme_fcp_abort(struct nvme_fc_local_port *lport,
static struct nvme_fc_port_template ibmvfc_nvme_fc_transport = {
.localport_delete = ibmvfc_nvme_localport_delete,
.remoteport_delete = ibmvfc_nvme_remoteport_delete,
.create_queue = NULL,
.delete_queue = NULL,
.create_queue = ibmvfc_nvme_create_queue,
.delete_queue = ibmvfc_nvme_delete_queue,
.ls_req = ibmvfc_nvme_ls_req,
.ls_abort = ibmvfc_nvme_ls_abort,
.fcp_io = ibmvfc_nvme_fcp_io,

7
drivers/scsi/ibmvscsi/ibmvfc-nvme.h
View File

@@ -27,6 +27,13 @@ extern unsigned int ibmvfc_debug;
struct ibmvfc_host;
struct ibmvfc_target;
struct ibmvfc_nvme_qhandle {
unsigned int qidx;
u16 cpu_id;
unsigned long index;
struct ibmvfc_queue *queue;
};
int ibmvfc_nvme_register_remoteport(struct ibmvfc_target *tgt);
void ibmvfc_nvme_unregister_remoteport(struct ibmvfc_target *tgt);
int ibmvfc_nvme_register(struct ibmvfc_host *vhost);