linux-kernel - [PATCH v3 02/13] scsi: fnic: Add and use fnic number

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Message-Id: <20231114223221.633719-1-kartilak@cisco.com>
Date:   Tue, 14 Nov 2023 14:32:21 -0800
From:   Karan Tilak Kumar <kartilak@...co.com>
To:     sebaddel@...co.com
Cc:     arulponn@...co.com, djhawar@...co.com, gcboffa@...co.com,
        mkai2@...co.com, satishkh@...co.com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Karan Tilak Kumar <kartilak@...co.com>
Subject: [PATCH v3 02/13] scsi: fnic: Add and use fnic number

Add fnic_num in fnic.h to identify fnic in a multi-fnic environment.
Increment and set the fnic number during driver load in fnic_probe.
Replace the host number with fnic number in debugfs.

Reviewed-by: Sesidhar Baddela <sebaddel@...co.com>
Reviewed-by: Arulprabhu Ponnusamy <arulponn@...co.com>
Signed-off-by: Karan Tilak Kumar <kartilak@...co.com>
---
 drivers/scsi/fnic/fnic.h         | 1 +
 drivers/scsi/fnic/fnic_debugfs.c | 2 +-
 drivers/scsi/fnic/fnic_main.c    | 6 +++++-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
index 93c68931a593..c6c549c633b1 100644
--- a/drivers/scsi/fnic/fnic.h
+++ b/drivers/scsi/fnic/fnic.h
@@ -216,6 +216,7 @@ struct fnic_event {
 
 /* Per-instance private data structure */
 struct fnic {
+	int fnic_num;
 	struct fc_lport *lport;
 	struct fcoe_ctlr ctlr;		/* FIP FCoE controller structure */
 	struct vnic_dev_bar bar0;
diff --git a/drivers/scsi/fnic/fnic_debugfs.c b/drivers/scsi/fnic/fnic_debugfs.c
index c4d9ed0d7d75..fac617672868 100644
--- a/drivers/scsi/fnic/fnic_debugfs.c
+++ b/drivers/scsi/fnic/fnic_debugfs.c
@@ -676,7 +676,7 @@ void fnic_stats_debugfs_init(struct fnic *fnic)
 {
 	char name[16];
 
-	snprintf(name, sizeof(name), "host%d", fnic->lport->host->host_no);
+	snprintf(name, sizeof(name), "fnic%d", fnic->fnic_num);
 
 	fnic->fnic_stats_debugfs_host = debugfs_create_dir(name,
 						fnic_stats_debugfs_root);
diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
index 984bc5fc55e2..ea7b1ba27ac7 100644
--- a/drivers/scsi/fnic/fnic_main.c
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -84,6 +84,9 @@ static struct libfc_function_template fnic_transport_template = {
 	.exch_mgr_reset = fnic_exch_mgr_reset
 };
 
+
+atomic_t fnic_num;
+
 static int fnic_slave_alloc(struct scsi_device *sdev)
 {
 	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
@@ -587,6 +590,7 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	int i;
 	unsigned long flags;
 
+	atomic_inc(&fnic_num);
 	/*
 	 * Allocate SCSI Host and set up association between host,
 	 * local port, and fnic
@@ -608,7 +612,7 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		 host->host_no);
 
 	host->transportt = fnic_fc_transport;
-
+	fnic->fnic_num = atomic_read(&fnic_num);
 	fnic_stats_debugfs_init(fnic);
 
 	/* Setup PCI resources */
-- 
2.31.1