[PATCH net-next 6/6] enic: detect admin channel resources for SR-IOV

[Satish Kharat via B4 Relay <devnull+satishkh.cisco.com@kernel.org>]

From: Satish Kharat <satishkh@cisco.com>

Check for the presence of admin channel BAR resources
(RES_TYPE_ADMIN_WQ, ADMIN_RQ, ADMIN_CQ, SRIOV_INTR) during resource
discovery. Set has_admin_channel when all four are available.

Add admin WQ, RQ, CQ and INTR fields to struct enic for use by the
upcoming admin channel open/close paths.

Signed-off-by: Satish Kharat <satishkh@cisco.com>
---
 drivers/net/ethernet/cisco/enic/enic.h     |  7 +++++++
 drivers/net/ethernet/cisco/enic/enic_res.c | 10 ++++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cisco/enic/enic.h b/drivers/net/ethernet/cisco/enic/enic.h
index 67fd780b1fa1..08472420f3a1 100644
--- a/drivers/net/ethernet/cisco/enic/enic.h
+++ b/drivers/net/ethernet/cisco/enic/enic.h
@@ -289,6 +289,13 @@ struct enic {
 	u8 rss_key[ENIC_RSS_LEN];
 	struct vnic_gen_stats gen_stats;
 	enum ext_cq ext_cq;
+
+	/* Admin channel resources for SR-IOV MBOX */
+	bool has_admin_channel;
+	struct vnic_wq admin_wq;
+	struct vnic_rq admin_rq;
+	struct vnic_cq admin_cq[2];
+	struct vnic_intr admin_intr;
 };
 
 static inline struct net_device *vnic_get_netdev(struct vnic_dev *vdev)
diff --git a/drivers/net/ethernet/cisco/enic/enic_res.c b/drivers/net/ethernet/cisco/enic/enic_res.c
index bbd3143ed73e..a3dc727d63ef 100644
--- a/drivers/net/ethernet/cisco/enic/enic_res.c
+++ b/drivers/net/ethernet/cisco/enic/enic_res.c
@@ -205,10 +205,16 @@ void enic_get_res_counts(struct enic *enic)
 	enic->cq_count = enic->cq_avail;
 	enic->intr_count = enic->intr_avail;
 
+	enic->has_admin_channel =
+		vnic_dev_get_res_count(enic->vdev, RES_TYPE_ADMIN_WQ) >= 1 &&
+		vnic_dev_get_res_count(enic->vdev, RES_TYPE_ADMIN_RQ) >= 1 &&
+		vnic_dev_get_res_count(enic->vdev, RES_TYPE_ADMIN_CQ) >= 1;
+
 	dev_info(enic_get_dev(enic),
-		"vNIC resources avail: wq %d rq %d cq %d intr %d\n",
+		"vNIC resources avail: wq %d rq %d cq %d intr %d admin %s\n",
 		enic->wq_avail, enic->rq_avail,
-		enic->cq_avail, enic->intr_avail);
+		enic->cq_avail, enic->intr_avail,
+		enic->has_admin_channel ? "yes" : "no");
 }
 
 void enic_init_vnic_resources(struct enic *enic)

-- 
2.43.0