[iwl-next v2 06/15] ice: base subfunction aux driver

[Michal Swiatkowski <michal.swiatkowski@linux.intel.com>]

From: Piotr Raczynski <piotr.raczynski@intel.com>

Implement subfunction driver. It is probe when subfunction port is
activated.

VSI is already created. During the probe VSI is being configured.
MAC unicast and broadcast filter is added to allow traffic to pass.

Store subfunction pointer in VSI struct. The same is done for VF
pointer. Make union of subfunction and VF pointer as only one of them
can be set with one VSI.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Piotr Raczynski <piotr.raczynski@intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
---
 drivers/net/ethernet/intel/ice/Makefile     |   1 +
 drivers/net/ethernet/intel/ice/ice.h        |   7 +-
 drivers/net/ethernet/intel/ice/ice_main.c   |  10 ++
 drivers/net/ethernet/intel/ice/ice_sf_eth.c | 139 ++++++++++++++++++++
 drivers/net/ethernet/intel/ice/ice_sf_eth.h |   9 ++
 5 files changed, 165 insertions(+), 1 deletion(-)
 create mode 100644 drivers/net/ethernet/intel/ice/ice_sf_eth.c

diff --git a/drivers/net/ethernet/intel/ice/Makefile b/drivers/net/ethernet/intel/ice/Makefile
index 03500e28ac99..4d987f5dcdc1 100644
--- a/drivers/net/ethernet/intel/ice/Makefile
+++ b/drivers/net/ethernet/intel/ice/Makefile
@@ -31,6 +31,7 @@ ice-y := ice_main.o	\
 	 ice_idc.o	\
 	 devlink/devlink.o	\
 	 devlink/devlink_port.o \
+	 ice_sf_eth.o	\
 	 ice_ddp.o	\
 	 ice_fw_update.o \
 	 ice_lag.o	\
diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index 8a30b786b334..e3c1313fe4ad 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -450,7 +450,12 @@ struct ice_vsi {
 	struct_group_tagged(ice_vsi_cfg_params, params,
 		struct ice_port_info *port_info; /* back pointer to port_info */
 		struct ice_channel *ch; /* VSI's channel structure, may be NULL */
-		struct ice_vf *vf; /* VF associated with this VSI, may be NULL */
+		union {
+			/* VF associated with this VSI, may be NULL */
+			struct ice_vf *vf;
+			/* SF associated with this VSI, may be NULL */
+			struct ice_dynamic_port *sf;
+		};
 		u32 flags; /* VSI flags used for rebuild and configuration */
 		enum ice_vsi_type type; /* the type of the VSI */
 	);
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index a555f70f78ed..f822cda22aec 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -15,6 +15,7 @@
 #include "ice_dcb_nl.h"
 #include "devlink/devlink.h"
 #include "devlink/devlink_port.h"
+#include "ice_sf_eth.h"
 #include "ice_hwmon.h"
 /* Including ice_trace.h with CREATE_TRACE_POINTS defined will generate the
  * ice tracepoint functions. This must be done exactly once across the
@@ -5864,8 +5865,16 @@ static int __init ice_module_init(void)
 		goto err_dest_lag_wq;
 	}
 
+	status = ice_sf_driver_register();
+	if (status) {
+		pr_err("Failed to register SF driver, err %d\n", status);
+		goto err_sf_driver;
+	}
+
 	return 0;
 
+err_sf_driver:
+	pci_unregister_driver(&ice_driver);
 err_dest_lag_wq:
 	destroy_workqueue(ice_lag_wq);
 	ice_debugfs_exit();
@@ -5883,6 +5892,7 @@ module_init(ice_module_init);
  */
 static void __exit ice_module_exit(void)
 {
+	ice_sf_driver_unregister();
 	pci_unregister_driver(&ice_driver);
 	ice_debugfs_exit();
 	destroy_workqueue(ice_wq);
diff --git a/drivers/net/ethernet/intel/ice/ice_sf_eth.c b/drivers/net/ethernet/intel/ice/ice_sf_eth.c
new file mode 100644
index 000000000000..abe495c2d033
--- /dev/null
+++ b/drivers/net/ethernet/intel/ice/ice_sf_eth.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2024, Intel Corporation. */
+#include "ice.h"
+#include "ice_lib.h"
+#include "ice_fltr.h"
+#include "ice_sf_eth.h"
+#include "devlink/devlink_port.h"
+#include "devlink/devlink.h"
+
+/**
+ * ice_sf_dev_probe - subfunction driver probe function
+ * @adev: pointer to the auxiliary device
+ * @id: pointer to the auxiliary_device id
+ *
+ * Configure VSI and netdev resources for the subfunction device.
+ *
+ * Return: zero on success or an error code on failure.
+ */
+static int ice_sf_dev_probe(struct auxiliary_device *adev,
+			    const struct auxiliary_device_id *id)
+{
+	struct ice_sf_dev *sf_dev = ice_adev_to_sf_dev(adev);
+	struct ice_dynamic_port *dyn_port = sf_dev->dyn_port;
+	struct ice_vsi *vsi = dyn_port->vsi;
+	struct ice_pf *pf = dyn_port->pf;
+	struct device *dev = &adev->dev;
+	struct ice_sf_priv *priv;
+	struct devlink *devlink;
+	int err;
+
+	vsi->type = ICE_VSI_SF;
+	vsi->port_info = pf->hw.port_info;
+	vsi->flags = ICE_VSI_FLAG_INIT;
+
+	priv = ice_allocate_sf(&adev->dev, pf);
+	if (!priv) {
+		dev_err(dev, "Subfunction devlink alloc failed");
+		return -ENOMEM;
+	}
+
+	priv->dev = sf_dev;
+	sf_dev->priv = priv;
+	devlink = priv_to_devlink(priv);
+
+	devl_lock(devlink);
+
+	err = ice_vsi_cfg(vsi);
+	if (err) {
+		dev_err(dev, "Subfunction vsi config failed");
+		goto err_free_devlink;
+	}
+	vsi->sf = dyn_port;
+
+	err = ice_devlink_create_sf_dev_port(sf_dev);
+	if (err) {
+		dev_err(dev, "Cannot add ice virtual devlink port for subfunction");
+		goto err_vsi_decfg;
+	}
+
+	err = devl_port_fn_devlink_set(&dyn_port->devlink_port, devlink);
+	if (err) {
+		dev_err(dev, "Can't link devlink instance to SF devlink port");
+		goto err_devlink_destroy;
+	}
+
+	ice_napi_add(vsi);
+	devl_unlock(devlink);
+
+	devlink_register(devlink);
+
+	return 0;
+
+err_devlink_destroy:
+	ice_devlink_destroy_sf_dev_port(sf_dev);
+err_vsi_decfg:
+	ice_vsi_decfg(vsi);
+err_free_devlink:
+	devl_unlock(devlink);
+	devlink_free(devlink);
+	return err;
+}
+
+/**
+ * ice_sf_dev_remove - subfunction driver remove function
+ * @adev: pointer to the auxiliary device
+ *
+ * Deinitalize VSI and netdev resources for the subfunction device.
+ */
+static void ice_sf_dev_remove(struct auxiliary_device *adev)
+{
+	struct ice_sf_dev *sf_dev = ice_adev_to_sf_dev(adev);
+	struct ice_dynamic_port *dyn_port = sf_dev->dyn_port;
+	struct ice_vsi *vsi = dyn_port->vsi;
+	struct devlink *devlink;
+
+	devlink = priv_to_devlink(sf_dev->priv);
+	devl_lock(devlink);
+
+	ice_vsi_close(vsi);
+
+	ice_devlink_destroy_sf_dev_port(sf_dev);
+	devl_unregister(devlink);
+	devl_unlock(devlink);
+	devlink_free(devlink);
+	ice_vsi_decfg(vsi);
+}
+
+static const struct auxiliary_device_id ice_sf_dev_id_table[] = {
+	{ .name = "ice.sf", },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(auxiliary, ice_sf_dev_id_table);
+
+static struct auxiliary_driver ice_sf_driver = {
+	.name = "sf",
+	.probe = ice_sf_dev_probe,
+	.remove = ice_sf_dev_remove,
+	.id_table = ice_sf_dev_id_table
+};
+
+/**
+ * ice_sf_driver_register - Register new auxiliary subfunction driver
+ *
+ * Return: zero on success or an error code on failure.
+ */
+int ice_sf_driver_register(void)
+{
+	return auxiliary_driver_register(&ice_sf_driver);
+}
+
+/**
+ * ice_sf_driver_unregister - Unregister new auxiliary subfunction driver
+ *
+ */
+void ice_sf_driver_unregister(void)
+{
+	auxiliary_driver_unregister(&ice_sf_driver);
+}
diff --git a/drivers/net/ethernet/intel/ice/ice_sf_eth.h b/drivers/net/ethernet/intel/ice/ice_sf_eth.h
index a08f8b2bceef..e972c50f96c9 100644
--- a/drivers/net/ethernet/intel/ice/ice_sf_eth.h
+++ b/drivers/net/ethernet/intel/ice/ice_sf_eth.h
@@ -18,4 +18,13 @@ struct ice_sf_priv {
 	struct devlink_port devlink_port;
 };
 
+static inline struct
+ice_sf_dev *ice_adev_to_sf_dev(struct auxiliary_device *adev)
+{
+	return container_of(adev, struct ice_sf_dev, adev);
+}
+
+int ice_sf_driver_register(void);
+void ice_sf_driver_unregister(void);
+
 #endif /* _ICE_SF_ETH_H_ */
-- 
2.42.0