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-rw-r--r--net/devlink/port.c1515
1 files changed, 1515 insertions, 0 deletions
diff --git a/net/devlink/port.c b/net/devlink/port.c
new file mode 100644
index 000000000000..4763b42885fb
--- /dev/null
+++ b/net/devlink/port.c
@@ -0,0 +1,1515 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
+ */
+
+#include "devl_internal.h"
+
+#define DEVLINK_PORT_FN_CAPS_VALID_MASK \
+ (_BITUL(__DEVLINK_PORT_FN_ATTR_CAPS_MAX) - 1)
+
+static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = {
+ [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY },
+ [DEVLINK_PORT_FN_ATTR_STATE] =
+ NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FN_STATE_INACTIVE,
+ DEVLINK_PORT_FN_STATE_ACTIVE),
+ [DEVLINK_PORT_FN_ATTR_CAPS] =
+ NLA_POLICY_BITFIELD32(DEVLINK_PORT_FN_CAPS_VALID_MASK),
+};
+
+#define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port) \
+ WARN_ON_ONCE(!(devlink_port)->registered)
+#define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port) \
+ WARN_ON_ONCE((devlink_port)->registered)
+
+struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
+ unsigned int port_index)
+{
+ return xa_load(&devlink->ports, port_index);
+}
+
+struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
+ struct nlattr **attrs)
+{
+ if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
+ u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
+ struct devlink_port *devlink_port;
+
+ devlink_port = devlink_port_get_by_index(devlink, port_index);
+ if (!devlink_port)
+ return ERR_PTR(-ENODEV);
+ return devlink_port;
+ }
+ return ERR_PTR(-EINVAL);
+}
+
+struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
+ struct genl_info *info)
+{
+ return devlink_port_get_from_attrs(devlink, info->attrs);
+}
+
+static void devlink_port_fn_cap_fill(struct nla_bitfield32 *caps,
+ u32 cap, bool is_enable)
+{
+ caps->selector |= cap;
+ if (is_enable)
+ caps->value |= cap;
+}
+
+static int devlink_port_fn_roce_fill(struct devlink_port *devlink_port,
+ struct nla_bitfield32 *caps,
+ struct netlink_ext_ack *extack)
+{
+ bool is_enable;
+ int err;
+
+ if (!devlink_port->ops->port_fn_roce_get)
+ return 0;
+
+ err = devlink_port->ops->port_fn_roce_get(devlink_port, &is_enable,
+ extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+
+ devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_ROCE, is_enable);
+ return 0;
+}
+
+static int devlink_port_fn_migratable_fill(struct devlink_port *devlink_port,
+ struct nla_bitfield32 *caps,
+ struct netlink_ext_ack *extack)
+{
+ bool is_enable;
+ int err;
+
+ if (!devlink_port->ops->port_fn_migratable_get ||
+ devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
+ return 0;
+
+ err = devlink_port->ops->port_fn_migratable_get(devlink_port,
+ &is_enable, extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+
+ devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_MIGRATABLE, is_enable);
+ return 0;
+}
+
+static int devlink_port_fn_ipsec_crypto_fill(struct devlink_port *devlink_port,
+ struct nla_bitfield32 *caps,
+ struct netlink_ext_ack *extack)
+{
+ bool is_enable;
+ int err;
+
+ if (!devlink_port->ops->port_fn_ipsec_crypto_get ||
+ devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
+ return 0;
+
+ err = devlink_port->ops->port_fn_ipsec_crypto_get(devlink_port, &is_enable, extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+
+ devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, is_enable);
+ return 0;
+}
+
+static int devlink_port_fn_ipsec_packet_fill(struct devlink_port *devlink_port,
+ struct nla_bitfield32 *caps,
+ struct netlink_ext_ack *extack)
+{
+ bool is_enable;
+ int err;
+
+ if (!devlink_port->ops->port_fn_ipsec_packet_get ||
+ devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
+ return 0;
+
+ err = devlink_port->ops->port_fn_ipsec_packet_get(devlink_port, &is_enable, extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+
+ devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_PACKET, is_enable);
+ return 0;
+}
+
+static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port,
+ struct sk_buff *msg,
+ struct netlink_ext_ack *extack,
+ bool *msg_updated)
+{
+ struct nla_bitfield32 caps = {};
+ int err;
+
+ err = devlink_port_fn_roce_fill(devlink_port, &caps, extack);
+ if (err)
+ return err;
+
+ err = devlink_port_fn_migratable_fill(devlink_port, &caps, extack);
+ if (err)
+ return err;
+
+ err = devlink_port_fn_ipsec_crypto_fill(devlink_port, &caps, extack);
+ if (err)
+ return err;
+
+ err = devlink_port_fn_ipsec_packet_fill(devlink_port, &caps, extack);
+ if (err)
+ return err;
+
+ if (!caps.selector)
+ return 0;
+ err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value,
+ caps.selector);
+ if (err)
+ return err;
+
+ *msg_updated = true;
+ return 0;
+}
+
+int devlink_nl_port_handle_fill(struct sk_buff *msg, struct devlink_port *devlink_port)
+{
+ if (devlink_nl_put_handle(msg, devlink_port->devlink))
+ return -EMSGSIZE;
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
+ return -EMSGSIZE;
+ return 0;
+}
+
+size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port)
+{
+ struct devlink *devlink = devlink_port->devlink;
+
+ return nla_total_size(strlen(devlink->dev->bus->name) + 1) /* DEVLINK_ATTR_BUS_NAME */
+ + nla_total_size(strlen(dev_name(devlink->dev)) + 1) /* DEVLINK_ATTR_DEV_NAME */
+ + nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */
+}
+
+static int devlink_nl_port_attrs_put(struct sk_buff *msg,
+ struct devlink_port *devlink_port)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+
+ if (!devlink_port->attrs_set)
+ return 0;
+ if (attrs->lanes) {
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes))
+ return -EMSGSIZE;
+ }
+ if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable))
+ return -EMSGSIZE;
+ if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
+ return -EMSGSIZE;
+ switch (devlink_port->attrs.flavour) {
+ case DEVLINK_PORT_FLAVOUR_PCI_PF:
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
+ attrs->pci_pf.controller) ||
+ nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf))
+ return -EMSGSIZE;
+ if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external))
+ return -EMSGSIZE;
+ break;
+ case DEVLINK_PORT_FLAVOUR_PCI_VF:
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
+ attrs->pci_vf.controller) ||
+ nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) ||
+ nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf))
+ return -EMSGSIZE;
+ if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external))
+ return -EMSGSIZE;
+ break;
+ case DEVLINK_PORT_FLAVOUR_PCI_SF:
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
+ attrs->pci_sf.controller) ||
+ nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
+ attrs->pci_sf.pf) ||
+ nla_put_u32(msg, DEVLINK_ATTR_PORT_PCI_SF_NUMBER,
+ attrs->pci_sf.sf))
+ return -EMSGSIZE;
+ break;
+ case DEVLINK_PORT_FLAVOUR_PHYSICAL:
+ case DEVLINK_PORT_FLAVOUR_CPU:
+ case DEVLINK_PORT_FLAVOUR_DSA:
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
+ attrs->phys.port_number))
+ return -EMSGSIZE;
+ if (!attrs->split)
+ return 0;
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
+ attrs->phys.port_number))
+ return -EMSGSIZE;
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
+ attrs->phys.split_subport_number))
+ return -EMSGSIZE;
+ break;
+ default:
+ break;
+ }
+ return 0;
+}
+
+static int devlink_port_fn_hw_addr_fill(struct devlink_port *port,
+ struct sk_buff *msg,
+ struct netlink_ext_ack *extack,
+ bool *msg_updated)
+{
+ u8 hw_addr[MAX_ADDR_LEN];
+ int hw_addr_len;
+ int err;
+
+ if (!port->ops->port_fn_hw_addr_get)
+ return 0;
+
+ err = port->ops->port_fn_hw_addr_get(port, hw_addr, &hw_addr_len,
+ extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+ err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr);
+ if (err)
+ return err;
+ *msg_updated = true;
+ return 0;
+}
+
+static bool
+devlink_port_fn_state_valid(enum devlink_port_fn_state state)
+{
+ return state == DEVLINK_PORT_FN_STATE_INACTIVE ||
+ state == DEVLINK_PORT_FN_STATE_ACTIVE;
+}
+
+static bool
+devlink_port_fn_opstate_valid(enum devlink_port_fn_opstate opstate)
+{
+ return opstate == DEVLINK_PORT_FN_OPSTATE_DETACHED ||
+ opstate == DEVLINK_PORT_FN_OPSTATE_ATTACHED;
+}
+
+static int devlink_port_fn_state_fill(struct devlink_port *port,
+ struct sk_buff *msg,
+ struct netlink_ext_ack *extack,
+ bool *msg_updated)
+{
+ enum devlink_port_fn_opstate opstate;
+ enum devlink_port_fn_state state;
+ int err;
+
+ if (!port->ops->port_fn_state_get)
+ return 0;
+
+ err = port->ops->port_fn_state_get(port, &state, &opstate, extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+ if (!devlink_port_fn_state_valid(state)) {
+ WARN_ON_ONCE(1);
+ NL_SET_ERR_MSG(extack, "Invalid state read from driver");
+ return -EINVAL;
+ }
+ if (!devlink_port_fn_opstate_valid(opstate)) {
+ WARN_ON_ONCE(1);
+ NL_SET_ERR_MSG(extack, "Invalid operational state read from driver");
+ return -EINVAL;
+ }
+ if (nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_STATE, state) ||
+ nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_OPSTATE, opstate))
+ return -EMSGSIZE;
+ *msg_updated = true;
+ return 0;
+}
+
+static int
+devlink_port_fn_mig_set(struct devlink_port *devlink_port, bool enable,
+ struct netlink_ext_ack *extack)
+{
+ return devlink_port->ops->port_fn_migratable_set(devlink_port, enable,
+ extack);
+}
+
+static int
+devlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable,
+ struct netlink_ext_ack *extack)
+{
+ return devlink_port->ops->port_fn_roce_set(devlink_port, enable,
+ extack);
+}
+
+static int
+devlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable,
+ struct netlink_ext_ack *extack)
+{
+ return devlink_port->ops->port_fn_ipsec_crypto_set(devlink_port, enable, extack);
+}
+
+static int
+devlink_port_fn_ipsec_packet_set(struct devlink_port *devlink_port, bool enable,
+ struct netlink_ext_ack *extack)
+{
+ return devlink_port->ops->port_fn_ipsec_packet_set(devlink_port, enable, extack);
+}
+
+static int devlink_port_fn_caps_set(struct devlink_port *devlink_port,
+ const struct nlattr *attr,
+ struct netlink_ext_ack *extack)
+{
+ struct nla_bitfield32 caps;
+ u32 caps_value;
+ int err;
+
+ caps = nla_get_bitfield32(attr);
+ caps_value = caps.value & caps.selector;
+ if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE) {
+ err = devlink_port_fn_roce_set(devlink_port,
+ caps_value & DEVLINK_PORT_FN_CAP_ROCE,
+ extack);
+ if (err)
+ return err;
+ }
+ if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) {
+ err = devlink_port_fn_mig_set(devlink_port, caps_value &
+ DEVLINK_PORT_FN_CAP_MIGRATABLE,
+ extack);
+ if (err)
+ return err;
+ }
+ if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) {
+ err = devlink_port_fn_ipsec_crypto_set(devlink_port, caps_value &
+ DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO,
+ extack);
+ if (err)
+ return err;
+ }
+ if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
+ err = devlink_port_fn_ipsec_packet_set(devlink_port, caps_value &
+ DEVLINK_PORT_FN_CAP_IPSEC_PACKET,
+ extack);
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
+static int
+devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *function_attr;
+ bool msg_updated = false;
+ int err;
+
+ function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION);
+ if (!function_attr)
+ return -EMSGSIZE;
+
+ err = devlink_port_fn_hw_addr_fill(port, msg, extack, &msg_updated);
+ if (err)
+ goto out;
+ err = devlink_port_fn_caps_fill(port, msg, extack, &msg_updated);
+ if (err)
+ goto out;
+ err = devlink_port_fn_state_fill(port, msg, extack, &msg_updated);
+out:
+ if (err || !msg_updated)
+ nla_nest_cancel(msg, function_attr);
+ else
+ nla_nest_end(msg, function_attr);
+ return err;
+}
+
+static int devlink_nl_port_fill(struct sk_buff *msg,
+ struct devlink_port *devlink_port,
+ enum devlink_command cmd, u32 portid, u32 seq,
+ int flags, struct netlink_ext_ack *extack)
+{
+ struct devlink *devlink = devlink_port->devlink;
+ void *hdr;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
+ goto nla_put_failure;
+
+ spin_lock_bh(&devlink_port->type_lock);
+ if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
+ goto nla_put_failure_type_locked;
+ if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
+ nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
+ devlink_port->desired_type))
+ goto nla_put_failure_type_locked;
+ if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
+ if (devlink_port->type_eth.netdev &&
+ (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
+ devlink_port->type_eth.ifindex) ||
+ nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
+ devlink_port->type_eth.ifname)))
+ goto nla_put_failure_type_locked;
+ }
+ if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
+ struct ib_device *ibdev = devlink_port->type_ib.ibdev;
+
+ if (ibdev &&
+ nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
+ ibdev->name))
+ goto nla_put_failure_type_locked;
+ }
+ spin_unlock_bh(&devlink_port->type_lock);
+ if (devlink_nl_port_attrs_put(msg, devlink_port))
+ goto nla_put_failure;
+ if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack))
+ goto nla_put_failure;
+ if (devlink_port->linecard &&
+ nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX,
+ devlink_port->linecard->index))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure_type_locked:
+ spin_unlock_bh(&devlink_port->type_lock);
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static void devlink_port_notify(struct devlink_port *devlink_port,
+ enum devlink_command cmd)
+{
+ struct devlink *devlink = devlink_port->devlink;
+ struct sk_buff *msg;
+ int err;
+
+ WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
+
+ if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
+ return;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL);
+ if (err) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
+ 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static void devlink_ports_notify(struct devlink *devlink,
+ enum devlink_command cmd)
+{
+ struct devlink_port *devlink_port;
+ unsigned long port_index;
+
+ xa_for_each(&devlink->ports, port_index, devlink_port)
+ devlink_port_notify(devlink_port, cmd);
+}
+
+void devlink_ports_notify_register(struct devlink *devlink)
+{
+ devlink_ports_notify(devlink, DEVLINK_CMD_PORT_NEW);
+}
+
+void devlink_ports_notify_unregister(struct devlink *devlink)
+{
+ devlink_ports_notify(devlink, DEVLINK_CMD_PORT_DEL);
+}
+
+int devlink_nl_port_get_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct sk_buff *msg;
+ int err;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW,
+ info->snd_portid, info->snd_seq, 0,
+ info->extack);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int
+devlink_nl_port_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
+ struct netlink_callback *cb, int flags)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_port *devlink_port;
+ unsigned long port_index;
+ int err = 0;
+
+ xa_for_each_start(&devlink->ports, port_index, devlink_port, state->idx) {
+ err = devlink_nl_port_fill(msg, devlink_port,
+ DEVLINK_CMD_NEW,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, flags,
+ cb->extack);
+ if (err) {
+ state->idx = port_index;
+ break;
+ }
+ }
+
+ return err;
+}
+
+int devlink_nl_port_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ return devlink_nl_dumpit(skb, cb, devlink_nl_port_get_dump_one);
+}
+
+static int devlink_port_type_set(struct devlink_port *devlink_port,
+ enum devlink_port_type port_type)
+
+{
+ int err;
+
+ if (!devlink_port->ops->port_type_set)
+ return -EOPNOTSUPP;
+
+ if (port_type == devlink_port->type)
+ return 0;
+
+ err = devlink_port->ops->port_type_set(devlink_port, port_type);
+ if (err)
+ return err;
+
+ devlink_port->desired_type = port_type;
+ devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
+ return 0;
+}
+
+static int devlink_port_function_hw_addr_set(struct devlink_port *port,
+ const struct nlattr *attr,
+ struct netlink_ext_ack *extack)
+{
+ const u8 *hw_addr;
+ int hw_addr_len;
+
+ hw_addr = nla_data(attr);
+ hw_addr_len = nla_len(attr);
+ if (hw_addr_len > MAX_ADDR_LEN) {
+ NL_SET_ERR_MSG(extack, "Port function hardware address too long");
+ return -EINVAL;
+ }
+ if (port->type == DEVLINK_PORT_TYPE_ETH) {
+ if (hw_addr_len != ETH_ALEN) {
+ NL_SET_ERR_MSG(extack, "Address must be 6 bytes for Ethernet device");
+ return -EINVAL;
+ }
+ if (!is_unicast_ether_addr(hw_addr)) {
+ NL_SET_ERR_MSG(extack, "Non-unicast hardware address unsupported");
+ return -EINVAL;
+ }
+ }
+
+ return port->ops->port_fn_hw_addr_set(port, hw_addr, hw_addr_len,
+ extack);
+}
+
+static int devlink_port_fn_state_set(struct devlink_port *port,
+ const struct nlattr *attr,
+ struct netlink_ext_ack *extack)
+{
+ enum devlink_port_fn_state state;
+
+ state = nla_get_u8(attr);
+ return port->ops->port_fn_state_set(port, state, extack);
+}
+
+static int devlink_port_function_validate(struct devlink_port *devlink_port,
+ struct nlattr **tb,
+ struct netlink_ext_ack *extack)
+{
+ const struct devlink_port_ops *ops = devlink_port->ops;
+ struct nlattr *attr;
+
+ if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] &&
+ !ops->port_fn_hw_addr_set) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR],
+ "Port doesn't support function attributes");
+ return -EOPNOTSUPP;
+ }
+ if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR],
+ "Function does not support state setting");
+ return -EOPNOTSUPP;
+ }
+ attr = tb[DEVLINK_PORT_FN_ATTR_CAPS];
+ if (attr) {
+ struct nla_bitfield32 caps;
+
+ caps = nla_get_bitfield32(attr);
+ if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE &&
+ !ops->port_fn_roce_set) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "Port doesn't support RoCE function attribute");
+ return -EOPNOTSUPP;
+ }
+ if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) {
+ if (!ops->port_fn_migratable_set) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "Port doesn't support migratable function attribute");
+ return -EOPNOTSUPP;
+ }
+ if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "migratable function attribute supported for VFs only");
+ return -EOPNOTSUPP;
+ }
+ }
+ if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) {
+ if (!ops->port_fn_ipsec_crypto_set) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "Port doesn't support ipsec_crypto function attribute");
+ return -EOPNOTSUPP;
+ }
+ if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "ipsec_crypto function attribute supported for VFs only");
+ return -EOPNOTSUPP;
+ }
+ }
+ if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
+ if (!ops->port_fn_ipsec_packet_set) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "Port doesn't support ipsec_packet function attribute");
+ return -EOPNOTSUPP;
+ }
+ if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "ipsec_packet function attribute supported for VFs only");
+ return -EOPNOTSUPP;
+ }
+ }
+ }
+ return 0;
+}
+
+static int devlink_port_function_set(struct devlink_port *port,
+ const struct nlattr *attr,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1];
+ int err;
+
+ err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr,
+ devlink_function_nl_policy, extack);
+ if (err < 0) {
+ NL_SET_ERR_MSG(extack, "Fail to parse port function attributes");
+ return err;
+ }
+
+ err = devlink_port_function_validate(port, tb, extack);
+ if (err)
+ return err;
+
+ attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
+ if (attr) {
+ err = devlink_port_function_hw_addr_set(port, attr, extack);
+ if (err)
+ return err;
+ }
+
+ attr = tb[DEVLINK_PORT_FN_ATTR_CAPS];
+ if (attr) {
+ err = devlink_port_fn_caps_set(port, attr, extack);
+ if (err)
+ return err;
+ }
+
+ /* Keep this as the last function attribute set, so that when
+ * multiple port function attributes are set along with state,
+ * Those can be applied first before activating the state.
+ */
+ attr = tb[DEVLINK_PORT_FN_ATTR_STATE];
+ if (attr)
+ err = devlink_port_fn_state_set(port, attr, extack);
+
+ if (!err)
+ devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
+ return err;
+}
+
+int devlink_nl_cmd_port_set_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ int err;
+
+ if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
+ enum devlink_port_type port_type;
+
+ port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
+ err = devlink_port_type_set(devlink_port, port_type);
+ if (err)
+ return err;
+ }
+
+ if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) {
+ struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION];
+ struct netlink_ext_ack *extack = info->extack;
+
+ err = devlink_port_function_set(devlink_port, attr, extack);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+int devlink_nl_cmd_port_split_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct devlink *devlink = info->user_ptr[0];
+ u32 count;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_SPLIT_COUNT))
+ return -EINVAL;
+ if (!devlink_port->ops->port_split)
+ return -EOPNOTSUPP;
+
+ count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
+
+ if (!devlink_port->attrs.splittable) {
+ /* Split ports cannot be split. */
+ if (devlink_port->attrs.split)
+ NL_SET_ERR_MSG(info->extack, "Port cannot be split further");
+ else
+ NL_SET_ERR_MSG(info->extack, "Port cannot be split");
+ return -EINVAL;
+ }
+
+ if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) {
+ NL_SET_ERR_MSG(info->extack, "Invalid split count");
+ return -EINVAL;
+ }
+
+ return devlink_port->ops->port_split(devlink, devlink_port, count,
+ info->extack);
+}
+
+int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct devlink *devlink = info->user_ptr[0];
+
+ if (!devlink_port->ops->port_unsplit)
+ return -EOPNOTSUPP;
+ return devlink_port->ops->port_unsplit(devlink, devlink_port, info->extack);
+}
+
+int devlink_nl_cmd_port_new_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink_port_new_attrs new_attrs = {};
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_port *devlink_port;
+ struct sk_buff *msg;
+ int err;
+
+ if (!devlink->ops->port_new)
+ return -EOPNOTSUPP;
+
+ if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] ||
+ !info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) {
+ NL_SET_ERR_MSG(extack, "Port flavour or PCI PF are not specified");
+ return -EINVAL;
+ }
+ new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]);
+ new_attrs.pfnum =
+ nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]);
+
+ if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
+ /* Port index of the new port being created by driver. */
+ new_attrs.port_index =
+ nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
+ new_attrs.port_index_valid = true;
+ }
+ if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) {
+ new_attrs.controller =
+ nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]);
+ new_attrs.controller_valid = true;
+ }
+ if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF &&
+ info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) {
+ new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]);
+ new_attrs.sfnum_valid = true;
+ }
+
+ err = devlink->ops->port_new(devlink, &new_attrs,
+ extack, &devlink_port);
+ if (err)
+ return err;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg) {
+ err = -ENOMEM;
+ goto err_out_port_del;
+ }
+ err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW,
+ info->snd_portid, info->snd_seq, 0, NULL);
+ if (WARN_ON_ONCE(err))
+ goto err_out_msg_free;
+ err = genlmsg_reply(msg, info);
+ if (err)
+ goto err_out_port_del;
+ return 0;
+
+err_out_msg_free:
+ nlmsg_free(msg);
+err_out_port_del:
+ devlink_port->ops->port_del(devlink, devlink_port, NULL);
+ return err;
+}
+
+int devlink_nl_cmd_port_del_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink *devlink = info->user_ptr[0];
+
+ if (!devlink_port->ops->port_del)
+ return -EOPNOTSUPP;
+
+ return devlink_port->ops->port_del(devlink, devlink_port, extack);
+}
+
+static void devlink_port_type_warn(struct work_struct *work)
+{
+ struct devlink_port *port = container_of(to_delayed_work(work),
+ struct devlink_port,
+ type_warn_dw);
+ dev_warn(port->devlink->dev, "Type was not set for devlink port.");
+}
+
+static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
+{
+ /* Ignore CPU and DSA flavours. */
+ return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
+ devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA &&
+ devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED;
+}
+
+#define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
+
+static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
+{
+ if (!devlink_port_type_should_warn(devlink_port))
+ return;
+ /* Schedule a work to WARN in case driver does not set port
+ * type within timeout.
+ */
+ schedule_delayed_work(&devlink_port->type_warn_dw,
+ DEVLINK_PORT_TYPE_WARN_TIMEOUT);
+}
+
+static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
+{
+ if (!devlink_port_type_should_warn(devlink_port))
+ return;
+ cancel_delayed_work_sync(&devlink_port->type_warn_dw);
+}
+
+/**
+ * devlink_port_init() - Init devlink port
+ *
+ * @devlink: devlink
+ * @devlink_port: devlink port
+ *
+ * Initialize essential stuff that is needed for functions
+ * that may be called before devlink port registration.
+ * Call to this function is optional and not needed
+ * in case the driver does not use such functions.
+ */
+void devlink_port_init(struct devlink *devlink,
+ struct devlink_port *devlink_port)
+{
+ if (devlink_port->initialized)
+ return;
+ devlink_port->devlink = devlink;
+ INIT_LIST_HEAD(&devlink_port->region_list);
+ devlink_port->initialized = true;
+}
+EXPORT_SYMBOL_GPL(devlink_port_init);
+
+/**
+ * devlink_port_fini() - Deinitialize devlink port
+ *
+ * @devlink_port: devlink port
+ *
+ * Deinitialize essential stuff that is in use for functions
+ * that may be called after devlink port unregistration.
+ * Call to this function is optional and not needed
+ * in case the driver does not use such functions.
+ */
+void devlink_port_fini(struct devlink_port *devlink_port)
+{
+ WARN_ON(!list_empty(&devlink_port->region_list));
+}
+EXPORT_SYMBOL_GPL(devlink_port_fini);
+
+static const struct devlink_port_ops devlink_port_dummy_ops = {};
+
+/**
+ * devl_port_register_with_ops() - Register devlink port
+ *
+ * @devlink: devlink
+ * @devlink_port: devlink port
+ * @port_index: driver-specific numerical identifier of the port
+ * @ops: port ops
+ *
+ * Register devlink port with provided port index. User can use
+ * any indexing, even hw-related one. devlink_port structure
+ * is convenient to be embedded inside user driver private structure.
+ * Note that the caller should take care of zeroing the devlink_port
+ * structure.
+ */
+int devl_port_register_with_ops(struct devlink *devlink,
+ struct devlink_port *devlink_port,
+ unsigned int port_index,
+ const struct devlink_port_ops *ops)
+{
+ int err;
+
+ devl_assert_locked(devlink);
+
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ devlink_port_init(devlink, devlink_port);
+ devlink_port->registered = true;
+ devlink_port->index = port_index;
+ devlink_port->ops = ops ? ops : &devlink_port_dummy_ops;
+ spin_lock_init(&devlink_port->type_lock);
+ INIT_LIST_HEAD(&devlink_port->reporter_list);
+ err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL);
+ if (err) {
+ devlink_port->registered = false;
+ return err;
+ }
+
+ INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
+ devlink_port_type_warn_schedule(devlink_port);
+ devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devl_port_register_with_ops);
+
+/**
+ * devlink_port_register_with_ops - Register devlink port
+ *
+ * @devlink: devlink
+ * @devlink_port: devlink port
+ * @port_index: driver-specific numerical identifier of the port
+ * @ops: port ops
+ *
+ * Register devlink port with provided port index. User can use
+ * any indexing, even hw-related one. devlink_port structure
+ * is convenient to be embedded inside user driver private structure.
+ * Note that the caller should take care of zeroing the devlink_port
+ * structure.
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+int devlink_port_register_with_ops(struct devlink *devlink,
+ struct devlink_port *devlink_port,
+ unsigned int port_index,
+ const struct devlink_port_ops *ops)
+{
+ int err;
+
+ devl_lock(devlink);
+ err = devl_port_register_with_ops(devlink, devlink_port,
+ port_index, ops);
+ devl_unlock(devlink);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_port_register_with_ops);
+
+/**
+ * devl_port_unregister() - Unregister devlink port
+ *
+ * @devlink_port: devlink port
+ */
+void devl_port_unregister(struct devlink_port *devlink_port)
+{
+ lockdep_assert_held(&devlink_port->devlink->lock);
+ WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET);
+
+ devlink_port_type_warn_cancel(devlink_port);
+ devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
+ xa_erase(&devlink_port->devlink->ports, devlink_port->index);
+ WARN_ON(!list_empty(&devlink_port->reporter_list));
+ devlink_port->registered = false;
+}
+EXPORT_SYMBOL_GPL(devl_port_unregister);
+
+/**
+ * devlink_port_unregister - Unregister devlink port
+ *
+ * @devlink_port: devlink port
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+void devlink_port_unregister(struct devlink_port *devlink_port)
+{
+ struct devlink *devlink = devlink_port->devlink;
+
+ devl_lock(devlink);
+ devl_port_unregister(devlink_port);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_port_unregister);
+
+static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port,
+ struct net_device *netdev)
+{
+ const struct net_device_ops *ops = netdev->netdev_ops;
+
+ /* If driver registers devlink port, it should set devlink port
+ * attributes accordingly so the compat functions are called
+ * and the original ops are not used.
+ */
+ if (ops->ndo_get_phys_port_name) {
+ /* Some drivers use the same set of ndos for netdevs
+ * that have devlink_port registered and also for
+ * those who don't. Make sure that ndo_get_phys_port_name
+ * returns -EOPNOTSUPP here in case it is defined.
+ * Warn if not.
+ */
+ char name[IFNAMSIZ];
+ int err;
+
+ err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
+ WARN_ON(err != -EOPNOTSUPP);
+ }
+ if (ops->ndo_get_port_parent_id) {
+ /* Some drivers use the same set of ndos for netdevs
+ * that have devlink_port registered and also for
+ * those who don't. Make sure that ndo_get_port_parent_id
+ * returns -EOPNOTSUPP here in case it is defined.
+ * Warn if not.
+ */
+ struct netdev_phys_item_id ppid;
+ int err;
+
+ err = ops->ndo_get_port_parent_id(netdev, &ppid);
+ WARN_ON(err != -EOPNOTSUPP);
+ }
+}
+
+static void __devlink_port_type_set(struct devlink_port *devlink_port,
+ enum devlink_port_type type,
+ void *type_dev)
+{
+ struct net_device *netdev = type_dev;
+
+ ASSERT_DEVLINK_PORT_REGISTERED(devlink_port);
+
+ if (type == DEVLINK_PORT_TYPE_NOTSET) {
+ devlink_port_type_warn_schedule(devlink_port);
+ } else {
+ devlink_port_type_warn_cancel(devlink_port);
+ if (type == DEVLINK_PORT_TYPE_ETH && netdev)
+ devlink_port_type_netdev_checks(devlink_port, netdev);
+ }
+
+ spin_lock_bh(&devlink_port->type_lock);
+ devlink_port->type = type;
+ switch (type) {
+ case DEVLINK_PORT_TYPE_ETH:
+ devlink_port->type_eth.netdev = netdev;
+ if (netdev) {
+ ASSERT_RTNL();
+ devlink_port->type_eth.ifindex = netdev->ifindex;
+ BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) !=
+ sizeof(netdev->name));
+ strcpy(devlink_port->type_eth.ifname, netdev->name);
+ }
+ break;
+ case DEVLINK_PORT_TYPE_IB:
+ devlink_port->type_ib.ibdev = type_dev;
+ break;
+ default:
+ break;
+ }
+ spin_unlock_bh(&devlink_port->type_lock);
+ devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
+}
+
+/**
+ * devlink_port_type_eth_set - Set port type to Ethernet
+ *
+ * @devlink_port: devlink port
+ *
+ * If driver is calling this, most likely it is doing something wrong.
+ */
+void devlink_port_type_eth_set(struct devlink_port *devlink_port)
+{
+ dev_warn(devlink_port->devlink->dev,
+ "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n",
+ devlink_port->index);
+ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL);
+}
+EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
+
+/**
+ * devlink_port_type_ib_set - Set port type to InfiniBand
+ *
+ * @devlink_port: devlink port
+ * @ibdev: related IB device
+ */
+void devlink_port_type_ib_set(struct devlink_port *devlink_port,
+ struct ib_device *ibdev)
+{
+ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
+}
+EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
+
+/**
+ * devlink_port_type_clear - Clear port type
+ *
+ * @devlink_port: devlink port
+ *
+ * If driver is calling this for clearing Ethernet type, most likely
+ * it is doing something wrong.
+ */
+void devlink_port_type_clear(struct devlink_port *devlink_port)
+{
+ if (devlink_port->type == DEVLINK_PORT_TYPE_ETH)
+ dev_warn(devlink_port->devlink->dev,
+ "devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n",
+ devlink_port->index);
+ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
+}
+EXPORT_SYMBOL_GPL(devlink_port_type_clear);
+
+int devlink_port_netdevice_event(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
+ struct devlink_port *devlink_port = netdev->devlink_port;
+ struct devlink *devlink;
+
+ if (!devlink_port)
+ return NOTIFY_OK;
+ devlink = devlink_port->devlink;
+
+ switch (event) {
+ case NETDEV_POST_INIT:
+ /* Set the type but not netdev pointer. It is going to be set
+ * later on by NETDEV_REGISTER event. Happens once during
+ * netdevice register
+ */
+ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH,
+ NULL);
+ break;
+ case NETDEV_REGISTER:
+ case NETDEV_CHANGENAME:
+ if (devlink_net(devlink) != dev_net(netdev))
+ return NOTIFY_OK;
+ /* Set the netdev on top of previously set type. Note this
+ * event happens also during net namespace change so here
+ * we take into account netdev pointer appearing in this
+ * namespace.
+ */
+ __devlink_port_type_set(devlink_port, devlink_port->type,
+ netdev);
+ break;
+ case NETDEV_UNREGISTER:
+ if (devlink_net(devlink) != dev_net(netdev))
+ return NOTIFY_OK;
+ /* Clear netdev pointer, but not the type. This event happens
+ * also during net namespace change so we need to clear
+ * pointer to netdev that is going to another net namespace.
+ */
+ __devlink_port_type_set(devlink_port, devlink_port->type,
+ NULL);
+ break;
+ case NETDEV_PRE_UNINIT:
+ /* Clear the type and the netdev pointer. Happens one during
+ * netdevice unregister.
+ */
+ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET,
+ NULL);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
+ enum devlink_port_flavour flavour)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+
+ devlink_port->attrs_set = true;
+ attrs->flavour = flavour;
+ if (attrs->switch_id.id_len) {
+ devlink_port->switch_port = true;
+ if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN))
+ attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN;
+ } else {
+ devlink_port->switch_port = false;
+ }
+ return 0;
+}
+
+/**
+ * devlink_port_attrs_set - Set port attributes
+ *
+ * @devlink_port: devlink port
+ * @attrs: devlink port attrs
+ */
+void devlink_port_attrs_set(struct devlink_port *devlink_port,
+ struct devlink_port_attrs *attrs)
+{
+ int ret;
+
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ devlink_port->attrs = *attrs;
+ ret = __devlink_port_attrs_set(devlink_port, attrs->flavour);
+ if (ret)
+ return;
+ WARN_ON(attrs->splittable && attrs->split);
+}
+EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
+
+/**
+ * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
+ *
+ * @devlink_port: devlink port
+ * @controller: associated controller number for the devlink port instance
+ * @pf: associated PF for the devlink port instance
+ * @external: indicates if the port is for an external controller
+ */
+void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller,
+ u16 pf, bool external)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+ int ret;
+
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ ret = __devlink_port_attrs_set(devlink_port,
+ DEVLINK_PORT_FLAVOUR_PCI_PF);
+ if (ret)
+ return;
+ attrs->pci_pf.controller = controller;
+ attrs->pci_pf.pf = pf;
+ attrs->pci_pf.external = external;
+}
+EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
+
+/**
+ * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
+ *
+ * @devlink_port: devlink port
+ * @controller: associated controller number for the devlink port instance
+ * @pf: associated PF for the devlink port instance
+ * @vf: associated VF of a PF for the devlink port instance
+ * @external: indicates if the port is for an external controller
+ */
+void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller,
+ u16 pf, u16 vf, bool external)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+ int ret;
+
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ ret = __devlink_port_attrs_set(devlink_port,
+ DEVLINK_PORT_FLAVOUR_PCI_VF);
+ if (ret)
+ return;
+ attrs->pci_vf.controller = controller;
+ attrs->pci_vf.pf = pf;
+ attrs->pci_vf.vf = vf;
+ attrs->pci_vf.external = external;
+}
+EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
+
+/**
+ * devlink_port_attrs_pci_sf_set - Set PCI SF port attributes
+ *
+ * @devlink_port: devlink port
+ * @controller: associated controller number for the devlink port instance
+ * @pf: associated PF for the devlink port instance
+ * @sf: associated SF of a PF for the devlink port instance
+ * @external: indicates if the port is for an external controller
+ */
+void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller,
+ u16 pf, u32 sf, bool external)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+ int ret;
+
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ ret = __devlink_port_attrs_set(devlink_port,
+ DEVLINK_PORT_FLAVOUR_PCI_SF);
+ if (ret)
+ return;
+ attrs->pci_sf.controller = controller;
+ attrs->pci_sf.pf = pf;
+ attrs->pci_sf.sf = sf;
+ attrs->pci_sf.external = external;
+}
+EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set);
+
+/**
+ * devlink_port_linecard_set - Link port with a linecard
+ *
+ * @devlink_port: devlink port
+ * @linecard: devlink linecard
+ */
+void devlink_port_linecard_set(struct devlink_port *devlink_port,
+ struct devlink_linecard *linecard)
+{
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ devlink_port->linecard = linecard;
+}
+EXPORT_SYMBOL_GPL(devlink_port_linecard_set);
+
+static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
+ char *name, size_t len)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+ int n = 0;
+
+ if (!devlink_port->attrs_set)
+ return -EOPNOTSUPP;
+
+ switch (attrs->flavour) {
+ case DEVLINK_PORT_FLAVOUR_PHYSICAL:
+ if (devlink_port->linecard)
+ n = snprintf(name, len, "l%u",
+ devlink_port->linecard->index);
+ if (n < len)
+ n += snprintf(name + n, len - n, "p%u",
+ attrs->phys.port_number);
+ if (n < len && attrs->split)
+ n += snprintf(name + n, len - n, "s%u",
+ attrs->phys.split_subport_number);
+ break;
+ case DEVLINK_PORT_FLAVOUR_CPU:
+ case DEVLINK_PORT_FLAVOUR_DSA:
+ case DEVLINK_PORT_FLAVOUR_UNUSED:
+ /* As CPU and DSA ports do not have a netdevice associated
+ * case should not ever happen.
+ */
+ WARN_ON(1);
+ return -EINVAL;
+ case DEVLINK_PORT_FLAVOUR_PCI_PF:
+ if (attrs->pci_pf.external) {
+ n = snprintf(name, len, "c%u", attrs->pci_pf.controller);
+ if (n >= len)
+ return -EINVAL;
+ len -= n;
+ name += n;
+ }
+ n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
+ break;
+ case DEVLINK_PORT_FLAVOUR_PCI_VF:
+ if (attrs->pci_vf.external) {
+ n = snprintf(name, len, "c%u", attrs->pci_vf.controller);
+ if (n >= len)
+ return -EINVAL;
+ len -= n;
+ name += n;
+ }
+ n = snprintf(name, len, "pf%uvf%u",
+ attrs->pci_vf.pf, attrs->pci_vf.vf);
+ break;
+ case DEVLINK_PORT_FLAVOUR_PCI_SF:
+ if (attrs->pci_sf.external) {
+ n = snprintf(name, len, "c%u", attrs->pci_sf.controller);
+ if (n >= len)
+ return -EINVAL;
+ len -= n;
+ name += n;
+ }
+ n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf,
+ attrs->pci_sf.sf);
+ break;
+ case DEVLINK_PORT_FLAVOUR_VIRTUAL:
+ return -EOPNOTSUPP;
+ }
+
+ if (n >= len)
+ return -EINVAL;
+
+ return 0;
+}
+
+int devlink_compat_phys_port_name_get(struct net_device *dev,
+ char *name, size_t len)
+{
+ struct devlink_port *devlink_port;
+
+ /* RTNL mutex is held here which ensures that devlink_port
+ * instance cannot disappear in the middle. No need to take
+ * any devlink lock as only permanent values are accessed.
+ */
+ ASSERT_RTNL();
+
+ devlink_port = dev->devlink_port;
+ if (!devlink_port)
+ return -EOPNOTSUPP;
+
+ return __devlink_port_phys_port_name_get(devlink_port, name, len);
+}
+
+int devlink_compat_switch_id_get(struct net_device *dev,
+ struct netdev_phys_item_id *ppid)
+{
+ struct devlink_port *devlink_port;
+
+ /* Caller must hold RTNL mutex or reference to dev, which ensures that
+ * devlink_port instance cannot disappear in the middle. No need to take
+ * any devlink lock as only permanent values are accessed.
+ */
+ devlink_port = dev->devlink_port;
+ if (!devlink_port || !devlink_port->switch_port)
+ return -EOPNOTSUPP;
+
+ memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
+
+ return 0;
+}