An upcoming feature of IBM VNIC protocol is the ability to configure
redundant backing devices for a VNIC client. In case of a failure
on the current backing device, the driver will receive a signal
from the hypervisor indicating that a failover will occur. The driver
will then wait for a message from the backing device before
establishing a new connection.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
struct device *dev = &adapter->vdev->dev;
dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
struct device *dev = &adapter->vdev->dev;
dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
- send_request_unmap(adapter, ltb->map_id);
+ if (!adapter->failover)
+ send_request_unmap(adapter, ltb->map_id);
}
static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
}
static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
for (i = 0; i < adapter->req_rx_queues; i++)
napi_disable(&adapter->napi[i]);
for (i = 0; i < adapter->req_rx_queues; i++)
napi_disable(&adapter->napi[i]);
- netif_tx_stop_all_queues(netdev);
+ if (!adapter->failover)
+ netif_tx_stop_all_queues(netdev);
if (adapter->bounce_buffer) {
if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
if (adapter->bounce_buffer) {
if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
rc = ibmvnic_send_crq_init(adapter);
if (rc)
dev_err(dev, "Error sending init rc=%ld\n", rc);
rc = ibmvnic_send_crq_init(adapter);
if (rc)
dev_err(dev, "Error sending init rc=%ld\n", rc);
+ } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
+ dev_info(dev, "Backing device failover detected\n");
+ netif_carrier_off(netdev);
+ adapter->failover = true;
} else {
/* The adapter lost the connection */
dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
} else {
/* The adapter lost the connection */
dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
struct device *dev = &adapter->vdev->dev;
struct net_device *netdev = adapter->netdev;
unsigned long timeout = msecs_to_jiffies(30000);
struct device *dev = &adapter->vdev->dev;
struct net_device *netdev = adapter->netdev;
unsigned long timeout = msecs_to_jiffies(30000);
+ if (adapter->failover) {
+ release_sub_crqs(adapter);
+ if (netif_running(netdev)) {
+ netif_tx_disable(netdev);
+ ibmvnic_close(netdev);
+ restart = true;
+ }
+ }
+
send_version_xchg(adapter);
reinit_completion(&adapter->init_done);
if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
send_version_xchg(adapter);
reinit_completion(&adapter->init_done);
if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
netdev->real_num_tx_queues = adapter->req_tx_queues;
netdev->real_num_tx_queues = adapter->req_tx_queues;
+ if (adapter->failover) {
+ adapter->failover = false;
+ if (restart) {
+ rc = ibmvnic_open(netdev);
+ if (rc)
+ goto restart_failed;
+ }
+ netif_carrier_on(netdev);
+ return;
+ }
+
rc = register_netdev(netdev);
if (rc) {
dev_err(dev,
rc = register_netdev(netdev);
if (rc) {
dev_err(dev,
+restart_failed:
+ dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
register_failed:
release_sub_crqs(adapter);
task_failed:
register_failed:
release_sub_crqs(adapter);
task_failed:
dev_set_drvdata(&dev->dev, netdev);
adapter->vdev = dev;
adapter->netdev = netdev;
dev_set_drvdata(&dev->dev, netdev);
adapter->vdev = dev;
adapter->netdev = netdev;
+ adapter->failover = false;
ether_addr_copy(adapter->mac_addr, mac_addr_p);
ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
ether_addr_copy(adapter->mac_addr, mac_addr_p);
ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
IBMVNIC_CRQ_INIT = 0x01,
IBMVNIC_CRQ_INIT_COMPLETE = 0x02,
IBMVNIC_PARTITION_MIGRATED = 0x06,
IBMVNIC_CRQ_INIT = 0x01,
IBMVNIC_CRQ_INIT_COMPLETE = 0x02,
IBMVNIC_PARTITION_MIGRATED = 0x06,
+ IBMVNIC_DEVICE_FAILOVER = 0x08,
};
struct ibmvnic_crq_queue {
};
struct ibmvnic_crq_queue {
u8 map_id;
struct work_struct vnic_crq_init;
u8 map_id;
struct work_struct vnic_crq_init;