ice: Remove and readd netdev during devlink reload

Recent changes to the devlink reload (commit 9b2348e2d6c9
("devlink: warn about existing entities during reload-reinit"))
force the drivers to destroy devlink ports during reinit.
Adjust ice driver to this requirement, unregister netdvice, destroy
devlink port. ice_init_eth() was removed and all the common code
between probe and reload was moved to ice_load().

During devlink reload we can't take devl_lock (it's already taken)
and in ice_probe() we have to lock it. Use devl_* variant of the API
which does not acquire and release devl_lock. Guard ice_load()
with devl_lock only in case of probe.

Suggested-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 61 insertions, 125 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 1fa3f40743f5..85a996ad2c1f 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -4574,90 +4574,6 @@ static void ice_decfg_netdev(struct ice_vsi *vsi)
 	vsi->netdev = NULL;
 }
 
-static int ice_start_eth(struct ice_vsi *vsi)
-{
-	int err;
-
-	err = ice_init_mac_fltr(vsi->back);
-	if (err)
-		return err;
-
-	err = ice_vsi_open(vsi);
-	if (err)
-		ice_fltr_remove_all(vsi);
-
-	return err;
-}
-
-static void ice_stop_eth(struct ice_vsi *vsi)
-{
-	ice_fltr_remove_all(vsi);
-	ice_vsi_close(vsi);
-}
-
-static int ice_init_eth(struct ice_pf *pf)
-{
-	struct ice_vsi *vsi = ice_get_main_vsi(pf);
-	int err;
-
-	if (!vsi)
-		return -EINVAL;
-
-	/* init channel list */
-	INIT_LIST_HEAD(&vsi->ch_list);
-
-	err = ice_cfg_netdev(vsi);
-	if (err)
-		return err;
-	/* Setup DCB netlink interface */
-	ice_dcbnl_setup(vsi);
-
-	err = ice_init_mac_fltr(pf);
-	if (err)
-		goto err_init_mac_fltr;
-
-	err = ice_devlink_create_pf_port(pf);
-	if (err)
-		goto err_devlink_create_pf_port;
-
-	SET_NETDEV_DEVLINK_PORT(vsi->netdev, &pf->devlink_port);
-
-	err = ice_register_netdev(vsi);
-	if (err)
-		goto err_register_netdev;
-
-	err = ice_tc_indir_block_register(vsi);
-	if (err)
-		goto err_tc_indir_block_register;
-
-	ice_napi_add(vsi);
-
-	return 0;
-
-err_tc_indir_block_register:
-	ice_unregister_netdev(vsi);
-err_register_netdev:
-	ice_devlink_destroy_pf_port(pf);
-err_devlink_create_pf_port:
-err_init_mac_fltr:
-	ice_decfg_netdev(vsi);
-	return err;
-}
-
-static void ice_deinit_eth(struct ice_pf *pf)
-{
-	struct ice_vsi *vsi = ice_get_main_vsi(pf);
-
-	if (!vsi)
-		return;
-
-	ice_vsi_close(vsi);
-	ice_unregister_netdev(vsi);
-	ice_devlink_destroy_pf_port(pf);
-	ice_tc_indir_block_unregister(vsi);
-	ice_decfg_netdev(vsi);
-}
-
 /**
  * ice_wait_for_fw - wait for full FW readiness
  * @hw: pointer to the hardware structure
@@ -4683,7 +4599,7 @@ static int ice_wait_for_fw(struct ice_hw *hw, u32 timeout)
 	return -ETIMEDOUT;
 }
 
-static int ice_init_dev(struct ice_pf *pf)
+int ice_init_dev(struct ice_pf *pf)
 {
 	struct device *dev = ice_pf_to_dev(pf);
 	struct ice_hw *hw = &pf->hw;
@@ -4776,7 +4692,7 @@ err_init_pf:
 	return err;
 }
 
-static void ice_deinit_dev(struct ice_pf *pf)
+void ice_deinit_dev(struct ice_pf *pf)
 {
 	ice_free_irq_msix_misc(pf);
 	ice_deinit_pf(pf);
@@ -5081,31 +4997,47 @@ static void ice_deinit(struct ice_pf *pf)
 /**
  * ice_load - load pf by init hw and starting VSI
  * @pf: pointer to the pf instance
+ *
+ * This function has to be called under devl_lock.
  */
 int ice_load(struct ice_pf *pf)
 {
-	struct ice_vsi_cfg_params params = {};
 	struct ice_vsi *vsi;
 	int err;
 
-	err = ice_init_dev(pf);
+	devl_assert_locked(priv_to_devlink(pf));
+
+	vsi = ice_get_main_vsi(pf);
+
+	/* init channel list */
+	INIT_LIST_HEAD(&vsi->ch_list);
+
+	err = ice_cfg_netdev(vsi);
 	if (err)
 		return err;
 
-	vsi = ice_get_main_vsi(pf);
+	/* Setup DCB netlink interface */
+	ice_dcbnl_setup(vsi);
 
-	params = ice_vsi_to_params(vsi);
-	params.flags = ICE_VSI_FLAG_INIT;
+	err = ice_init_mac_fltr(pf);
+	if (err)
+		goto err_init_mac_fltr;
 
-	rtnl_lock();
-	err = ice_vsi_cfg(vsi, &params);
+	err = ice_devlink_create_pf_port(pf);
 	if (err)
-		goto err_vsi_cfg;
+		goto err_devlink_create_pf_port;
 
-	err = ice_start_eth(ice_get_main_vsi(pf));
+	SET_NETDEV_DEVLINK_PORT(vsi->netdev, &pf->devlink_port);
+
+	err = ice_register_netdev(vsi);
+	if (err)
+		goto err_register_netdev;
+
+	err = ice_tc_indir_block_register(vsi);
 	if (err)
-		goto err_start_eth;
-	rtnl_unlock();
+		goto err_tc_indir_block_register;
+
+	ice_napi_add(vsi);
 
 	err = ice_init_rdma(pf);
 	if (err)
@@ -5119,29 +5051,35 @@ int ice_load(struct ice_pf *pf)
 	return 0;
 
 err_init_rdma:
-	ice_vsi_close(ice_get_main_vsi(pf));
-	rtnl_lock();
-err_start_eth:
-	ice_vsi_decfg(ice_get_main_vsi(pf));
-err_vsi_cfg:
-	rtnl_unlock();
-	ice_deinit_dev(pf);
+	ice_tc_indir_block_unregister(vsi);
+err_tc_indir_block_register:
+	ice_unregister_netdev(vsi);
+err_register_netdev:
+	ice_devlink_destroy_pf_port(pf);
+err_devlink_create_pf_port:
+err_init_mac_fltr:
+	ice_decfg_netdev(vsi);
 	return err;
 }
 
 /**
  * ice_unload - unload pf by stopping VSI and deinit hw
  * @pf: pointer to the pf instance
+ *
+ * This function has to be called under devl_lock.
  */
 void ice_unload(struct ice_pf *pf)
 {
+	struct ice_vsi *vsi = ice_get_main_vsi(pf);
+
+	devl_assert_locked(priv_to_devlink(pf));
+
 	ice_deinit_features(pf);
 	ice_deinit_rdma(pf);
-	rtnl_lock();
-	ice_stop_eth(ice_get_main_vsi(pf));
-	ice_vsi_decfg(ice_get_main_vsi(pf));
-	rtnl_unlock();
-	ice_deinit_dev(pf);
+	ice_tc_indir_block_unregister(vsi);
+	ice_unregister_netdev(vsi);
+	ice_devlink_destroy_pf_port(pf);
+	ice_decfg_netdev(vsi);
 }
 
 /**
@@ -5239,27 +5177,23 @@ ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent)
 	if (err)
 		goto err_init;
 
-	err = ice_init_eth(pf);
+	devl_lock(priv_to_devlink(pf));
+	err = ice_load(pf);
+	devl_unlock(priv_to_devlink(pf));
 	if (err)
-		goto err_init_eth;
-
-	err = ice_init_rdma(pf);
-	if (err)
-		goto err_init_rdma;
+		goto err_load;
 
 	err = ice_init_devlink(pf);
 	if (err)
 		goto err_init_devlink;
 
-	ice_init_features(pf);
-
 	return 0;
 
 err_init_devlink:
-	ice_deinit_rdma(pf);
-err_init_rdma:
-	ice_deinit_eth(pf);
-err_init_eth:
+	devl_lock(priv_to_devlink(pf));
+	ice_unload(pf);
+	devl_unlock(priv_to_devlink(pf));
+err_load:
 	ice_deinit(pf);
 err_init:
 	pci_disable_device(pdev);
@@ -5357,12 +5291,14 @@ static void ice_remove(struct pci_dev *pdev)
 
 	if (!ice_is_safe_mode(pf))
 		ice_remove_arfs(pf);
-	ice_deinit_features(pf);
+
 	ice_deinit_devlink(pf);
-	ice_deinit_rdma(pf);
-	ice_deinit_eth(pf);
-	ice_deinit(pf);
 
+	devl_lock(priv_to_devlink(pf));
+	ice_unload(pf);
+	devl_unlock(priv_to_devlink(pf));
+
+	ice_deinit(pf);
 	ice_vsi_release_all(pf);
 
 	ice_setup_mc_magic_wake(pf);