1 files changed, 288 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink_port.c b/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
index 62ef8e2fb5f1..6202568a3e05 100644
--- a/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
+++ b/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
@@ -5,6 +5,9 @@
 
 #include "ice.h"
 #include "devlink.h"
+#include "devlink_port.h"
+#include "ice_lib.h"
+#include "ice_fltr.h"
 
 static int ice_active_port_option = -1;
 
@@ -485,3 +488,288 @@ void ice_devlink_destroy_vf_port(struct ice_vf *vf)
 	devl_rate_leaf_destroy(&vf->devlink_port);
 	devl_port_unregister(&vf->devlink_port);
 }
+
+/**
+ * ice_dealloc_dynamic_port - Deallocate and remove a dynamic port
+ * @dyn_port: dynamic port instance to deallocate
+ *
+ * Free resources associated with a dynamically added devlink port. Will
+ * deactivate the port if its currently active.
+ */
+static void ice_dealloc_dynamic_port(struct ice_dynamic_port *dyn_port)
+{
+	struct devlink_port *devlink_port = &dyn_port->devlink_port;
+	struct ice_pf *pf = dyn_port->pf;
+
+	xa_erase(&pf->sf_nums, devlink_port->attrs.pci_sf.sf);
+	devl_port_unregister(devlink_port);
+	ice_vsi_free(dyn_port->vsi);
+	xa_erase(&pf->dyn_ports, dyn_port->vsi->idx);
+	kfree(dyn_port);
+}
+
+/**
+ * ice_dealloc_all_dynamic_ports - Deallocate all dynamic devlink ports
+ * @pf: pointer to the pf structure
+ */
+void ice_dealloc_all_dynamic_ports(struct ice_pf *pf)
+{
+	struct ice_dynamic_port *dyn_port;
+	unsigned long index;
+
+	xa_for_each(&pf->dyn_ports, index, dyn_port)
+		ice_dealloc_dynamic_port(dyn_port);
+}
+
+/**
+ * ice_devlink_port_new_check_attr - Check that new port attributes are valid
+ * @pf: pointer to the PF structure
+ * @new_attr: the attributes for the new port
+ * @extack: extack for reporting error messages
+ *
+ * Check that the attributes for the new port are valid before continuing to
+ * allocate the devlink port.
+ *
+ * Return: zero on success or an error code on failure.
+ */
+static int
+ice_devlink_port_new_check_attr(struct ice_pf *pf,
+				const struct devlink_port_new_attrs *new_attr,
+				struct netlink_ext_ack *extack)
+{
+	if (new_attr->flavour != DEVLINK_PORT_FLAVOUR_PCI_SF) {
+		NL_SET_ERR_MSG_MOD(extack, "Flavour other than pcisf is not supported");
+		return -EOPNOTSUPP;
+	}
+
+	if (new_attr->controller_valid) {
+		NL_SET_ERR_MSG_MOD(extack, "Setting controller is not supported");
+		return -EOPNOTSUPP;
+	}
+
+	if (new_attr->port_index_valid) {
+		NL_SET_ERR_MSG_MOD(extack, "Driver does not support user defined port index assignment");
+		return -EOPNOTSUPP;
+	}
+
+	if (new_attr->pfnum != pf->hw.pf_id) {
+		NL_SET_ERR_MSG_MOD(extack, "Incorrect pfnum supplied");
+		return -EINVAL;
+	}
+
+	if (!pci_msix_can_alloc_dyn(pf->pdev)) {
+		NL_SET_ERR_MSG_MOD(extack, "Dynamic MSIX-X interrupt allocation is not supported");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+/**
+ * ice_devlink_port_del - devlink handler for port delete
+ * @devlink: pointer to devlink
+ * @port: devlink port to be deleted
+ * @extack: pointer to extack
+ *
+ * Deletes devlink port and deallocates all resources associated with
+ * created subfunction.
+ *
+ * Return: zero on success or an error code on failure.
+ */
+static int
+ice_devlink_port_del(struct devlink *devlink, struct devlink_port *port,
+		     struct netlink_ext_ack *extack)
+{
+	struct ice_dynamic_port *dyn_port;
+
+	dyn_port = ice_devlink_port_to_dyn(port);
+	ice_dealloc_dynamic_port(dyn_port);
+
+	return 0;
+}
+
+static const struct devlink_port_ops ice_devlink_port_sf_ops = {
+	.port_del = ice_devlink_port_del,
+};
+
+/**
+ * ice_reserve_sf_num - Reserve a subfunction number for this port
+ * @pf: pointer to the pf structure
+ * @new_attr: devlink port attributes requested
+ * @extack: extack for reporting error messages
+ * @sfnum: on success, the sf number reserved
+ *
+ * Reserve a subfunction number for this port. Only called for
+ * DEVLINK_PORT_FLAVOUR_PCI_SF ports.
+ *
+ * Return: zero on success or an error code on failure.
+ */
+static int
+ice_reserve_sf_num(struct ice_pf *pf,
+		   const struct devlink_port_new_attrs *new_attr,
+		   struct netlink_ext_ack *extack, u32 *sfnum)
+{
+	int err;
+
+	/* If user didn't request an explicit number, pick one */
+	if (!new_attr->sfnum_valid)
+		return xa_alloc(&pf->sf_nums, sfnum, NULL, xa_limit_32b,
+				GFP_KERNEL);
+
+	/* Otherwise, check and use the number provided */
+	err = xa_insert(&pf->sf_nums, new_attr->sfnum, NULL, GFP_KERNEL);
+	if (err) {
+		if (err == -EBUSY)
+			NL_SET_ERR_MSG_MOD(extack, "Subfunction with given sfnum already exists");
+		return err;
+	}
+
+	*sfnum = new_attr->sfnum;
+
+	return 0;
+}
+
+/**
+ * ice_devlink_create_sf_port - Register PCI subfunction devlink port
+ * @dyn_port: the dynamic port instance structure for this subfunction
+ *
+ * Register PCI subfunction flavour devlink port for a dynamically added
+ * subfunction port.
+ *
+ * Return: zero on success or an error code on failure.
+ */
+int ice_devlink_create_sf_port(struct ice_dynamic_port *dyn_port)
+{
+	struct devlink_port_attrs attrs = {};
+	struct devlink_port *devlink_port;
+	struct devlink *devlink;
+	struct ice_vsi *vsi;
+	struct ice_pf *pf;
+
+	vsi = dyn_port->vsi;
+	pf = dyn_port->pf;
+
+	devlink_port = &dyn_port->devlink_port;
+
+	attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_SF;
+	attrs.pci_sf.pf = pf->hw.pf_id;
+	attrs.pci_sf.sf = dyn_port->sfnum;
+
+	devlink_port_attrs_set(devlink_port, &attrs);
+	devlink = priv_to_devlink(pf);
+
+	return devl_port_register_with_ops(devlink, devlink_port, vsi->idx,
+					   &ice_devlink_port_sf_ops);
+}
+
+/**
+ * ice_devlink_destroy_sf_port - Destroy the devlink_port for this SF
+ * @dyn_port: the dynamic port instance structure for this subfunction
+ *
+ * Unregisters the devlink_port structure associated with this SF.
+ */
+void ice_devlink_destroy_sf_port(struct ice_dynamic_port *dyn_port)
+{
+	devl_port_unregister(&dyn_port->devlink_port);
+}
+
+/**
+ * ice_alloc_dynamic_port - Allocate new dynamic port
+ * @pf: pointer to the pf structure
+ * @new_attr: devlink port attributes requested
+ * @extack: extack for reporting error messages
+ * @devlink_port: index of newly created devlink port
+ *
+ * Allocate a new dynamic port instance and prepare it for configuration
+ * with devlink.
+ *
+ * Return: zero on success or an error code on failure.
+ */
+static int
+ice_alloc_dynamic_port(struct ice_pf *pf,
+		       const struct devlink_port_new_attrs *new_attr,
+		       struct netlink_ext_ack *extack,
+		       struct devlink_port **devlink_port)
+{
+	struct ice_dynamic_port *dyn_port;
+	struct ice_vsi *vsi;
+	u32 sfnum;
+	int err;
+
+	err = ice_reserve_sf_num(pf, new_attr, extack, &sfnum);
+	if (err)
+		return err;
+
+	dyn_port = kzalloc(sizeof(*dyn_port), GFP_KERNEL);
+	if (!dyn_port) {
+		err = -ENOMEM;
+		goto unroll_reserve_sf_num;
+	}
+
+	vsi = ice_vsi_alloc(pf);
+	if (!vsi) {
+		NL_SET_ERR_MSG_MOD(extack, "Unable to allocate VSI");
+		err = -ENOMEM;
+		goto unroll_dyn_port_alloc;
+	}
+
+	dyn_port->vsi = vsi;
+	dyn_port->pf = pf;
+	dyn_port->sfnum = sfnum;
+	eth_random_addr(dyn_port->hw_addr);
+
+	err = xa_insert(&pf->dyn_ports, vsi->idx, dyn_port, GFP_KERNEL);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack, "Port index reservation failed");
+		goto unroll_vsi_alloc;
+	}
+
+	err = ice_devlink_create_sf_port(dyn_port);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack, "Port registration failed");
+		goto unroll_xa_insert;
+	}
+
+	*devlink_port = &dyn_port->devlink_port;
+
+	return 0;
+
+unroll_xa_insert:
+	xa_erase(&pf->dyn_ports, vsi->idx);
+unroll_vsi_alloc:
+	ice_vsi_free(vsi);
+unroll_dyn_port_alloc:
+	kfree(dyn_port);
+unroll_reserve_sf_num:
+	xa_erase(&pf->sf_nums, sfnum);
+
+	return err;
+}
+
+/**
+ * ice_devlink_port_new - devlink handler for the new port
+ * @devlink: pointer to devlink
+ * @new_attr: pointer to the port new attributes
+ * @extack: extack for reporting error messages
+ * @devlink_port: pointer to a new port
+ *
+ * Creates new devlink port, checks new port attributes and reject
+ * any unsupported parameters, allocates new subfunction for that port.
+ *
+ * Return: zero on success or an error code on failure.
+ */
+int
+ice_devlink_port_new(struct devlink *devlink,
+		     const struct devlink_port_new_attrs *new_attr,
+		     struct netlink_ext_ack *extack,
+		     struct devlink_port **devlink_port)
+{
+	struct ice_pf *pf = devlink_priv(devlink);
+	int err;
+
+	err = ice_devlink_port_new_check_attr(pf, new_attr, extack);
+	if (err)
+		return err;
+
+	return ice_alloc_dynamic_port(pf, new_attr, extack, devlink_port);
+}