From: Grzegorz Nitka <grzegorz.nitka@intel.com>
Date: Thu, 19 Aug 2021 17:08:56 -0700
Subject: ice: enable/disable switchdev when managing VFs
Patch-mainline: v5.16-rc1
Git-commit: 1c54c839935be6abd8889431665f813ec658d776
References: jsc#SLE-18375

Only way to enable switchdev is to create VFs when the eswitch
mode is set to switchdev. Check if correct mode is set and
enable switchdev in function which creating VFs.

Disable switchdev when user change number of VFs to 0. Changing
eswitch mode back to legacy when VFs are created in switchdev
mode isn't allowed.

As switchdev takes care of managing filter rules, adding new
rules on VF is blocked.

In case of resetting VF driver has to update pointer in ice_repr
struct, because after reset VSI related things can change.

Co-developed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/ice/ice_eswitch.c     |   38 +++++++++++++++++++++++
 drivers/net/ethernet/intel/ice/ice_eswitch.h     |    4 ++
 drivers/net/ethernet/intel/ice/ice_main.c        |    6 ++-
 drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c |   17 ++++++++++
 4 files changed, 63 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/intel/ice/ice_eswitch.c
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch.c
@@ -233,6 +233,32 @@ ice_eswitch_release_reprs(struct ice_pf
 }
 
 /**
+ * ice_eswitch_update_repr - reconfigure VF port representor
+ * @vsi: VF VSI for which port representor is configured
+ */
+void ice_eswitch_update_repr(struct ice_vsi *vsi)
+{
+	struct ice_pf *pf = vsi->back;
+	struct ice_repr *repr;
+	struct ice_vf *vf;
+	int ret;
+
+	if (!ice_is_switchdev_running(pf))
+		return;
+
+	vf = &pf->vf[vsi->vf_id];
+	repr = vf->repr;
+	repr->src_vsi = vsi;
+	repr->dst->u.port_info.port_id = vsi->vsi_num;
+
+	ret = ice_vsi_update_security(vsi, ice_vsi_ctx_clear_antispoof);
+	if (ret) {
+		ice_fltr_add_mac_and_broadcast(vsi, vf->hw_lan_addr.addr, ICE_FWD_TO_VSI);
+		dev_err(ice_pf_to_dev(pf), "Failed to update VF %d port representor", vsi->vf_id);
+	}
+}
+
+/**
  * ice_eswitch_release_env - clear switchdev HW filters
  * @pf: pointer to PF struct
  *
@@ -424,6 +450,18 @@ int ice_eswitch_mode_get(struct devlink
 }
 
 /**
+ * ice_is_eswitch_mode_switchdev - check if eswitch mode is set to switchdev
+ * @pf: pointer to PF structure
+ *
+ * Returns true if eswitch mode is set to DEVLINK_ESWITCH_MODE_SWITCHDEV,
+ * false otherwise.
+ */
+bool ice_is_eswitch_mode_switchdev(struct ice_pf *pf)
+{
+	return pf->eswitch_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
+}
+
+/**
  * ice_eswitch_release - cleanup eswitch
  * @pf: pointer to PF structure
  */
--- a/drivers/net/ethernet/intel/ice/ice_eswitch.h
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch.h
@@ -15,9 +15,13 @@ int
 ice_eswitch_mode_set(struct devlink *devlink, u16 mode,
 		     struct netlink_ext_ack *extack);
 bool ice_is_eswitch_mode_switchdev(struct ice_pf *pf);
+
+void ice_eswitch_update_repr(struct ice_vsi *vsi);
 #else /* CONFIG_ICE_SWITCHDEV */
 static inline void ice_eswitch_release(struct ice_pf *pf) { }
 
+static inline void ice_eswitch_update_repr(struct ice_vsi *vsi) { }
+
 static inline int ice_eswitch_configure(struct ice_pf *pf)
 {
 	return -EOPNOTSUPP;
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -6067,7 +6067,8 @@ int ice_vsi_setup_tx_rings(struct ice_vs
 		if (!ring)
 			return -EINVAL;
 
-		ring->netdev = vsi->netdev;
+		if (vsi->netdev)
+			ring->netdev = vsi->netdev;
 		err = ice_setup_tx_ring(ring);
 		if (err)
 			break;
@@ -6098,7 +6099,8 @@ int ice_vsi_setup_rx_rings(struct ice_vs
 		if (!ring)
 			return -EINVAL;
 
-		ring->netdev = vsi->netdev;
+		if (vsi->netdev)
+			ring->netdev = vsi->netdev;
 		err = ice_setup_rx_ring(ring);
 		if (err)
 			break;
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
@@ -6,6 +6,7 @@
 #include "ice_lib.h"
 #include "ice_fltr.h"
 #include "ice_flow.h"
+#include "ice_eswitch.h"
 #include "ice_virtchnl_allowlist.h"
 
 #define FIELD_SELECTOR(proto_hdr_field) \
@@ -620,6 +621,8 @@ void ice_free_vfs(struct ice_pf *pf)
 	if (!pf->vf)
 		return;
 
+	ice_eswitch_release(pf);
+
 	while (test_and_set_bit(ICE_VF_DIS, pf->state))
 		usleep_range(1000, 2000);
 
@@ -932,6 +935,9 @@ static int ice_vf_rebuild_host_mac_cfg(s
 	enum ice_status status;
 	u8 broadcast[ETH_ALEN];
 
+	if (ice_is_eswitch_mode_switchdev(vf->pf))
+		return 0;
+
 	eth_broadcast_addr(broadcast);
 	status = ice_fltr_add_mac(vsi, broadcast, ICE_FWD_TO_VSI);
 	if (status) {
@@ -1711,6 +1717,8 @@ bool ice_reset_vf(struct ice_vf *vf, boo
 	}
 
 	ice_vf_post_vsi_rebuild(vf);
+	vsi = ice_get_vf_vsi(vf);
+	ice_eswitch_update_repr(vsi);
 
 	/* if the VF has been reset allow it to come up again */
 	if (ice_mbx_clear_malvf(&hw->mbx_snapshot, pf->malvfs, ICE_MAX_VF_COUNT, vf->vf_id))
@@ -1962,6 +1970,10 @@ static int ice_ena_vfs(struct ice_pf *pf
 	}
 
 	clear_bit(ICE_VF_DIS, pf->state);
+
+	if (ice_eswitch_configure(pf))
+		goto err_unroll_sriov;
+
 	return 0;
 
 err_unroll_sriov:
@@ -4783,6 +4795,11 @@ int ice_set_vf_mac(struct net_device *ne
 	struct ice_vf *vf;
 	int ret;
 
+	if (ice_is_eswitch_mode_switchdev(pf)) {
+		dev_info(ice_pf_to_dev(pf), "Trusted VF is forbidden in switchdev mode\n");
+		return -EOPNOTSUPP;
+	}
+
 	if (ice_validate_vf_id(pf, vf_id))
 		return -EINVAL;