+static int
+rte_eth_is_valid_owner_id(uint64_t owner_id)
+{
+ if (owner_id == RTE_ETH_DEV_NO_OWNER ||
+ rte_eth_dev_shared_data->next_owner_id <= owner_id) {
+ RTE_PMD_DEBUG_TRACE("Invalid owner_id=%016lX.\n", owner_id);
+ return 0;
+ }
+ return 1;
+}
+
+uint64_t __rte_experimental
+rte_eth_find_next_owned_by(uint16_t port_id, const uint64_t owner_id)
+{
+ while (port_id < RTE_MAX_ETHPORTS &&
+ ((rte_eth_devices[port_id].state != RTE_ETH_DEV_ATTACHED &&
+ rte_eth_devices[port_id].state != RTE_ETH_DEV_REMOVED) ||
+ rte_eth_devices[port_id].data->owner.id != owner_id))
+ port_id++;
+
+ if (port_id >= RTE_MAX_ETHPORTS)
+ return RTE_MAX_ETHPORTS;
+
+ return port_id;
+}
+
+int __rte_experimental
+rte_eth_dev_owner_new(uint64_t *owner_id)
+{
+ rte_eth_dev_shared_data_prepare();
+
+ rte_spinlock_lock(&rte_eth_dev_shared_data->ownership_lock);
+
+ *owner_id = rte_eth_dev_shared_data->next_owner_id++;
+
+ rte_spinlock_unlock(&rte_eth_dev_shared_data->ownership_lock);
+ return 0;
+}
+
+static int
+_rte_eth_dev_owner_set(const uint16_t port_id, const uint64_t old_owner_id,
+ const struct rte_eth_dev_owner *new_owner)
+{
+ struct rte_eth_dev_owner *port_owner;
+ int sret;
+
+ RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
+
+ if (!rte_eth_is_valid_owner_id(new_owner->id) &&
+ !rte_eth_is_valid_owner_id(old_owner_id))
+ return -EINVAL;
+
+ port_owner = &rte_eth_devices[port_id].data->owner;
+ if (port_owner->id != old_owner_id) {
+ RTE_PMD_DEBUG_TRACE("Cannot set owner to port %d already owned"
+ " by %s_%016lX.\n", port_id,
+ port_owner->name, port_owner->id);
+ return -EPERM;
+ }
+
+ sret = snprintf(port_owner->name, RTE_ETH_MAX_OWNER_NAME_LEN, "%s",
+ new_owner->name);
+ if (sret < 0 || sret >= RTE_ETH_MAX_OWNER_NAME_LEN)
+ RTE_PMD_DEBUG_TRACE("Port %d owner name was truncated.\n",
+ port_id);
+
+ port_owner->id = new_owner->id;
+
+ RTE_PMD_DEBUG_TRACE("Port %d owner is %s_%016lX.\n", port_id,
+ new_owner->name, new_owner->id);
+
+ return 0;
+}
+
+int __rte_experimental
+rte_eth_dev_owner_set(const uint16_t port_id,
+ const struct rte_eth_dev_owner *owner)
+{
+ int ret;
+
+ rte_eth_dev_shared_data_prepare();
+
+ rte_spinlock_lock(&rte_eth_dev_shared_data->ownership_lock);
+
+ ret = _rte_eth_dev_owner_set(port_id, RTE_ETH_DEV_NO_OWNER, owner);
+
+ rte_spinlock_unlock(&rte_eth_dev_shared_data->ownership_lock);
+ return ret;
+}
+
+int __rte_experimental
+rte_eth_dev_owner_unset(const uint16_t port_id, const uint64_t owner_id)
+{
+ const struct rte_eth_dev_owner new_owner = (struct rte_eth_dev_owner)
+ {.id = RTE_ETH_DEV_NO_OWNER, .name = ""};
+ int ret;
+
+ rte_eth_dev_shared_data_prepare();
+
+ rte_spinlock_lock(&rte_eth_dev_shared_data->ownership_lock);
+
+ ret = _rte_eth_dev_owner_set(port_id, owner_id, &new_owner);
+
+ rte_spinlock_unlock(&rte_eth_dev_shared_data->ownership_lock);
+ return ret;
+}
+
+void __rte_experimental
+rte_eth_dev_owner_delete(const uint64_t owner_id)
+{
+ uint16_t port_id;
+
+ rte_eth_dev_shared_data_prepare();
+
+ rte_spinlock_lock(&rte_eth_dev_shared_data->ownership_lock);
+
+ if (rte_eth_is_valid_owner_id(owner_id)) {
+ RTE_ETH_FOREACH_DEV_OWNED_BY(port_id, owner_id)
+ memset(&rte_eth_devices[port_id].data->owner, 0,
+ sizeof(struct rte_eth_dev_owner));
+ RTE_PMD_DEBUG_TRACE("All port owners owned by %016X identifier"
+ " have removed.\n", owner_id);
+ }
+
+ rte_spinlock_unlock(&rte_eth_dev_shared_data->ownership_lock);
+}
+
+int __rte_experimental
+rte_eth_dev_owner_get(const uint16_t port_id, struct rte_eth_dev_owner *owner)
+{
+ int ret = 0;
+
+ rte_eth_dev_shared_data_prepare();
+
+ rte_spinlock_lock(&rte_eth_dev_shared_data->ownership_lock);
+
+ if (!rte_eth_dev_is_valid_port(port_id)) {
+ RTE_PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
+ ret = -ENODEV;
+ } else {
+ rte_memcpy(owner, &rte_eth_devices[port_id].data->owner,
+ sizeof(*owner));
+ }
+
+ rte_spinlock_unlock(&rte_eth_dev_shared_data->ownership_lock);
+ return ret;
+}
+