igb: Report SR-IOV VF status

Expose the cached per-VF configuration through the iflib VF status
method.  Report mailbox handshake state, MAC address, access or trunk
VLAN mode, hardware queue count, administrator policy, and MDD blocking
state without issuing mailbox requests or reading hardware registers.

3 files changed, 60 insertions, 0 deletions

diff --git a/sys/dev/e1000/if_em.c b/sys/dev/e1000/if_em.c
index 44c5ec7a850c..d9db4677bf62 100644
--- a/sys/dev/e1000/if_em.c
+++ b/sys/dev/e1000/if_em.c
@@ -665,6 +665,7 @@ static device_method_t igb_if_methods[] = {
 	DEVMETHOD(ifdi_iov_init, igb_if_iov_init),
 	DEVMETHOD(ifdi_iov_uninit, igb_if_iov_uninit),
 	DEVMETHOD(ifdi_iov_vf_add, igb_if_iov_vf_add),
+	DEVMETHOD(ifdi_vf_status, igb_if_vf_status),
 #endif
 	DEVMETHOD_END
 };
diff --git a/sys/dev/e1000/if_igb_iov.c b/sys/dev/e1000/if_igb_iov.c
index dc4b23397431..e62ca8aa029c 100644
--- a/sys/dev/e1000/if_igb_iov.c
+++ b/sys/dev/e1000/if_igb_iov.c
@@ -1996,6 +1996,64 @@ igb_iov_validate(struct e1000_softc *sc, u16 num_vfs)
 }
 
 int
+igb_if_vf_status(if_ctx_t ctx, nvlist_t *status)
+{
+	struct e1000_softc *sc;
+	struct igb_vf *vf;
+	nvlist_t **vfs;
+	u_int num_queues;
+	int error, i;
+
+	sc = iflib_get_softc(ctx);
+	if (sc->num_vfs == 0)
+		return (ENXIO);
+	num_queues = sc->hw.mac.type == e1000_82576 ?
+	    IGB_82576_VF_QUEUES : IGB_I350_VF_QUEUES;
+	vfs = mallocarray(sc->num_vfs, sizeof(*vfs), M_IGB_IOV,
+	    M_WAITOK | M_ZERO);
+	for (i = 0; i < sc->num_vfs; i++) {
+		vf = &sc->vfs[i];
+		vfs[i] = nvlist_create(0);
+		nvlist_add_number(vfs[i], IFVF_STATUS_INDEX, i);
+		nvlist_add_bool(vfs[i], IFVF_STATUS_CONFIGURED,
+		    (vf->flags & IGB_VF_ACTIVE) != 0);
+		nvlist_add_bool(vfs[i], IFVF_STATUS_INITIALIZED,
+		    (vf->flags & IGB_VF_CTS) != 0);
+		nvlist_add_binary(vfs[i], IFVF_STATUS_MAC, vf->mac,
+		    ETHER_ADDR_LEN);
+		if (vf->default_vlan == 0)
+			nvlist_add_string(vfs[i], IFVF_STATUS_VLAN_MODE,
+			    IFVF_VLAN_MODE_TRUNK);
+		else {
+			nvlist_add_string(vfs[i], IFVF_STATUS_VLAN_MODE,
+			    IFVF_VLAN_MODE_ACCESS);
+			nvlist_add_number(vfs[i], IFVF_STATUS_VLAN,
+			    vf->default_vlan);
+		}
+		nvlist_add_number(vfs[i], IFVF_STATUS_VLAN_COUNT,
+		    vf->vlan_count);
+		nvlist_add_number(vfs[i], IFVF_STATUS_NUM_QUEUES, num_queues);
+		nvlist_add_bool(vfs[i], IFVF_STATUS_ALLOW_SET_MAC,
+		    (vf->flags & IGB_VF_CAP_MAC) != 0);
+		nvlist_add_bool(vfs[i], IFVF_STATUS_ALLOW_SET_VLAN,
+		    vf->default_vlan == 0);
+		nvlist_add_bool(vfs[i], IFVF_STATUS_MAC_ANTI_SPOOF,
+		    (vf->flags & IGB_VF_MAC_ANTI_SPOOF) != 0);
+		nvlist_add_bool(vfs[i], IFVF_STATUS_ALLOW_PROMISC,
+		    (vf->flags & IGB_VF_ALLOW_PROMISC) != 0);
+		nvlist_add_bool(vfs[i], IFVF_STATUS_MDD_BLOCKED,
+		    (vf->flags & IGB_VF_MDD_BLOCKED) != 0);
+	}
+	nvlist_add_nvlist_array(status, IFVF_STATUS_VFS,
+	    (const nvlist_t * const *)vfs, sc->num_vfs);
+	error = nvlist_error(status);
+	for (i = 0; i < sc->num_vfs; i++)
+		nvlist_destroy(vfs[i]);
+	free(vfs, M_IGB_IOV);
+	return (error);
+}
+
+int
 igb_if_iov_init(if_ctx_t ctx, u16 num_vfs, const nvlist_t *config)
 {
 	struct e1000_softc *sc;
diff --git a/sys/dev/e1000/if_igb_iov.h b/sys/dev/e1000/if_igb_iov.h
index 8bd576d47649..390e63175c7a 100644
--- a/sys/dev/e1000/if_igb_iov.h
+++ b/sys/dev/e1000/if_igb_iov.h
@@ -24,6 +24,7 @@ int	igb_iov_validate(struct e1000_softc *, u16);
 int	igb_if_iov_init(if_ctx_t, u16, const nvlist_t *);
 void	igb_if_iov_uninit(if_ctx_t);
 int	igb_if_iov_vf_add(if_ctx_t, u16, const nvlist_t *);
+int	igb_if_vf_status(if_ctx_t, nvlist_t *);
 void	igb_iov_initialize(struct e1000_softc *);
 void	igb_iov_handle_mbx(struct e1000_softc *);
 void	igb_iov_handle_mdd(struct e1000_softc *);