diff mbox series

[SRU,N,1/1] ice: Remove and readd netdev during devlink reload

Message ID 20241205173935.381176-2-jacob.martin@canonical.com
State New
Headers show
Series Fix ice driver RTNL assertion failed warning on shutdown/reboot | expand

Commit Message

Jacob Martin Dec. 5, 2024, 5:39 p.m. UTC 
From: Wojciech Drewek <wojciech.drewek@intel.com>

BugLink: https://bugs.launchpad.net/bugs/2091107

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>
(cherry picked from commit 41cc4e53934c30f1cf7745c257154e538c78a1f5)
Signed-off-by: Jacob Martin <jacob.martin@canonical.com>
---
 drivers/net/ethernet/intel/ice/ice.h         |   2 +
 drivers/net/ethernet/intel/ice/ice_devlink.c |  68 ++++++-
 drivers/net/ethernet/intel/ice/ice_main.c    | 186 ++++++-------------
 3 files changed, 125 insertions(+), 131 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index d0832c61c108..eb1f2b14e8d1 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -1002,6 +1002,8 @@  void ice_service_task_schedule(struct ice_pf *pf);
 int ice_load(struct ice_pf *pf);
 void ice_unload(struct ice_pf *pf);
 void ice_adv_lnk_speed_maps_init(void);
+int ice_init_dev(struct ice_pf *pf);
+void ice_deinit_dev(struct ice_pf *pf);
 
 /**
  * ice_set_rdma_cap - enable RDMA support
diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c
index 98de9338a20c..961069e28827 100644
--- a/drivers/net/ethernet/intel/ice/ice_devlink.c
+++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
@@ -444,6 +444,20 @@  ice_devlink_reload_empr_start(struct ice_pf *pf,
 	return 0;
 }
 
+/**
+ * ice_devlink_reinit_down - unload given PF
+ * @pf: pointer to the PF struct
+ */
+static void ice_devlink_reinit_down(struct ice_pf *pf)
+{
+	/* No need to take devl_lock, it's already taken by devlink API */
+	ice_unload(pf);
+	rtnl_lock();
+	ice_vsi_decfg(ice_get_main_vsi(pf));
+	rtnl_unlock();
+	ice_deinit_dev(pf);
+}
+
 /**
  * ice_devlink_reload_down - prepare for reload
  * @devlink: pointer to the devlink instance to reload
@@ -477,7 +491,7 @@  ice_devlink_reload_down(struct devlink *devlink, bool netns_change,
 					   "Remove all VFs before doing reinit\n");
 			return -EOPNOTSUPP;
 		}
-		ice_unload(pf);
+		ice_devlink_reinit_down(pf);
 		return 0;
 	case DEVLINK_RELOAD_ACTION_FW_ACTIVATE:
 		return ice_devlink_reload_empr_start(pf, extack);
@@ -1269,6 +1283,45 @@  static int ice_devlink_set_parent(struct devlink_rate *devlink_rate,
 	return status;
 }
 
+/**
+ * ice_devlink_reinit_up - do reinit of the given PF
+ * @pf: pointer to the PF struct
+ */
+static int ice_devlink_reinit_up(struct ice_pf *pf)
+{
+	struct ice_vsi *vsi = ice_get_main_vsi(pf);
+	struct ice_vsi_cfg_params params;
+	int err;
+
+	err = ice_init_dev(pf);
+	if (err)
+		return err;
+
+	params = ice_vsi_to_params(vsi);
+	params.flags = ICE_VSI_FLAG_INIT;
+
+	rtnl_lock();
+	err = ice_vsi_cfg(vsi, &params);
+	rtnl_unlock();
+	if (err)
+		goto err_vsi_cfg;
+
+	/* No need to take devl_lock, it's already taken by devlink API */
+	err = ice_load(pf);
+	if (err)
+		goto err_load;
+
+	return 0;
+
+err_load:
+	rtnl_lock();
+	ice_vsi_decfg(vsi);
+	rtnl_unlock();
+err_vsi_cfg:
+	ice_deinit_dev(pf);
+	return err;
+}
+
 /**
  * ice_devlink_reload_up - do reload up after reinit
  * @devlink: pointer to the devlink instance reloading
@@ -1289,7 +1342,7 @@  ice_devlink_reload_up(struct devlink *devlink,
 	switch (action) {
 	case DEVLINK_RELOAD_ACTION_DRIVER_REINIT:
 		*actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
-		return ice_load(pf);
+		return ice_devlink_reinit_up(pf);
 	case DEVLINK_RELOAD_ACTION_FW_ACTIVATE:
 		*actions_performed = BIT(DEVLINK_RELOAD_ACTION_FW_ACTIVATE);
 		return ice_devlink_reload_empr_finish(pf, extack);
@@ -1569,6 +1622,7 @@  static const struct devlink_port_ops ice_devlink_port_ops = {
  * @pf: the PF to create a devlink port for
  *
  * Create and register a devlink_port for this PF.
+ * This function has to be called under devl_lock.
  *
  * Return: zero on success or an error code on failure.
  */
@@ -1581,6 +1635,8 @@  int ice_devlink_create_pf_port(struct ice_pf *pf)
 	struct device *dev;
 	int err;
 
+	devlink = priv_to_devlink(pf);
+
 	dev = ice_pf_to_dev(pf);
 
 	devlink_port = &pf->devlink_port;
@@ -1601,10 +1657,9 @@  int ice_devlink_create_pf_port(struct ice_pf *pf)
 	ice_devlink_set_switch_id(pf, &attrs.switch_id);
 
 	devlink_port_attrs_set(devlink_port, &attrs);
-	devlink = priv_to_devlink(pf);
 
-	err = devlink_port_register_with_ops(devlink, devlink_port, vsi->idx,
-					     &ice_devlink_port_ops);
+	err = devl_port_register_with_ops(devlink, devlink_port, vsi->idx,
+					  &ice_devlink_port_ops);
 	if (err) {
 		dev_err(dev, "Failed to create devlink port for PF %d, error %d\n",
 			pf->hw.pf_id, err);
@@ -1619,10 +1674,11 @@  int ice_devlink_create_pf_port(struct ice_pf *pf)
  * @pf: the PF to cleanup
  *
  * Unregisters the devlink_port structure associated with this PF.
+ * This function has to be called under devl_lock.
  */
 void ice_devlink_destroy_pf_port(struct ice_pf *pf)
 {
-	devlink_port_unregister(&pf->devlink_port);
+	devl_port_unregister(&pf->devlink_port);
 }
 
 /**
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 3e1c4674826c..b33ebaabbc84 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -4627,90 +4627,6 @@  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
@@ -4736,7 +4652,7 @@  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;
@@ -4829,7 +4745,7 @@  static int ice_init_dev(struct ice_pf *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);
@@ -5134,31 +5050,47 @@  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)
@@ -5172,29 +5104,35 @@  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);
 }
 
 /**
@@ -5292,27 +5230,23 @@  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);
@@ -5410,12 +5344,14 @@  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);