ice: Add support for per VF ctrl VSI enabling

We are going to enable FDIR configure for AVF through virtual channel.
The first step is to add helper functions to support control VSI setup.
A control VSI will be allocated for a VF when AVF creates its
first FDIR rule through ice_vf_ctrl_vsi_setup().
The patch will also allocate FDIR rule space for VF's control VSI.
If a VF asks for flow director rules, then those should come entirely
from the best effort pool and not from the guaranteed pool. The patch
allow a VF VSI to have only space in the best effort rules.

Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
Signed-off-by: Yahui Cao <yahui.cao@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Tested-by: Chen Bo <BoX.C.Chen@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 61 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
index 1f38a8d0c525..fa72b7e2e433 100644
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
@@ -202,6 +202,25 @@ static void ice_vf_vsi_release(struct ice_vf *vf)
 }
 
 /**
+ * ice_vf_ctrl_invalidate_vsi - invalidate ctrl_vsi_idx to remove VSI access
+ * @vf: VF that control VSI is being invalidated on
+ */
+static void ice_vf_ctrl_invalidate_vsi(struct ice_vf *vf)
+{
+	vf->ctrl_vsi_idx = ICE_NO_VSI;
+}
+
+/**
+ * ice_vf_ctrl_vsi_release - invalidate the VF's control VSI after freeing it
+ * @vf: VF that control VSI is being released on
+ */
+static void ice_vf_ctrl_vsi_release(struct ice_vf *vf)
+{
+	ice_vsi_release(vf->pf->vsi[vf->ctrl_vsi_idx]);
+	ice_vf_ctrl_invalidate_vsi(vf);
+}
+
+/**
  * ice_free_vf_res - Free a VF's resources
  * @vf: pointer to the VF info
  */
@@ -214,6 +233,9 @@ static void ice_free_vf_res(struct ice_vf *vf)
 	 * accessing the VF's VSI after it's freed or invalidated.
 	 */
 	clear_bit(ICE_VF_STATE_INIT, vf->vf_states);
+	/* free VF control VSI */
+	if (vf->ctrl_vsi_idx != ICE_NO_VSI)
+		ice_vf_ctrl_vsi_release(vf);
 
 	/* free VSI and disconnect it from the parent uplink */
 	if (vf->lan_vsi_idx != ICE_NO_VSI) {
@@ -560,6 +582,28 @@ static struct ice_vsi *ice_vf_vsi_setup(struct ice_vf *vf)
 }
 
 /**
+ * ice_vf_ctrl_vsi_setup - Set up a VF control VSI
+ * @vf: VF to setup control VSI for
+ *
+ * Returns pointer to the successfully allocated VSI struct on success,
+ * otherwise returns NULL on failure.
+ */
+struct ice_vsi *ice_vf_ctrl_vsi_setup(struct ice_vf *vf)
+{
+	struct ice_port_info *pi = ice_vf_get_port_info(vf);
+	struct ice_pf *pf = vf->pf;
+	struct ice_vsi *vsi;
+
+	vsi = ice_vsi_setup(pf, pi, ICE_VSI_CTRL, vf->vf_id);
+	if (!vsi) {
+		dev_err(ice_pf_to_dev(pf), "Failed to create VF control VSI\n");
+		ice_vf_ctrl_invalidate_vsi(vf);
+	}
+
+	return vsi;
+}
+
+/**
  * ice_calc_vf_first_vector_idx - Calculate MSIX vector index in the PF space
  * @pf: pointer to PF structure
  * @vf: pointer to VF that the first MSIX vector index is being calculated for
@@ -1256,6 +1300,12 @@ bool ice_reset_all_vfs(struct ice_pf *pf, bool is_vflr)
 	ice_for_each_vf(pf, v) {
 		vf = &pf->vf[v];
 
+		/* clean VF control VSI when resetting VFs since it should be
+		 * setup only when VF creates its first FDIR rule.
+		 */
+		if (vf->ctrl_vsi_idx != ICE_NO_VSI)
+			ice_vf_ctrl_invalidate_vsi(vf);
+
 		ice_vf_pre_vsi_rebuild(vf);
 		ice_vf_rebuild_vsi(vf);
 		ice_vf_post_vsi_rebuild(vf);
@@ -1374,6 +1424,12 @@ bool ice_reset_vf(struct ice_vf *vf, bool is_vflr)
 			dev_err(dev, "disabling promiscuous mode failed\n");
 	}
 
+	/* clean VF control VSI when resetting VF since it should be setup
+	 * only when VF creates its first FDIR rule.
+	 */
+	if (vf->ctrl_vsi_idx != ICE_NO_VSI)
+		ice_vf_ctrl_vsi_release(vf);
+
 	ice_vf_pre_vsi_rebuild(vf);
 	ice_vf_rebuild_vsi_with_release(vf);
 	ice_vf_post_vsi_rebuild(vf);
@@ -1549,6 +1605,11 @@ static void ice_set_dflt_settings_vfs(struct ice_pf *pf)
 		set_bit(ICE_VIRTCHNL_VF_CAP_L2, &vf->vf_caps);
 		vf->spoofchk = true;
 		vf->num_vf_qs = pf->num_qps_per_vf;
+
+		/* ctrl_vsi_idx will be set to a valid value only when VF
+		 * creates its first fdir rule.
+		 */
+		ice_vf_ctrl_invalidate_vsi(vf);
 	}
 }