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enic: detect admin channel resources for SR-IOV 

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.

Use ARRAY_SIZE(enic->admin_cq) for the admin CQ count check since the
driver allocates two admin CQs (one for WQ completions, one for RQ
completions) and both must be backed by hardware resources.

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>
Link: https://patch.msgid.link/20260401-enic-sriov-v2-prep-v4-6-d5834b2ef1b9@cisco.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
master
Satish Kharat 2026-04-01 08:31:16 -07:00 committed by Jakub Kicinski
parent 730ce15d44
commit 4368f5fab4
2 changed files with 17 additions and 2 deletions
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7
drivers/net/ethernet/cisco/enic/enic.h
View File

@ -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)

12
drivers/net/ethernet/cisco/enic/enic_res.c
View File

@ -205,10 +205,18 @@ 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) >=
ARRAY_SIZE(enic->admin_cq) &&
vnic_dev_get_res_count(enic->vdev, RES_TYPE_SRIOV_INTR) >= 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)