static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
{
u8 err = 0;
struct ixgbe_adapter *adapter = netdev_priv(netdev);
DPRINTK(DRV, INFO, "Set DCB Admin Mode.\n");
if (state > 0) {
/* Turn on DCB */
if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
goto out;
if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
DPRINTK(DRV, ERR, "Enable failed, needs MSI-X\n");
err = 1;
goto out;
}
if (netif_running(netdev))
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_reset_interrupt_capability(adapter);
ixgbe_napi_del_all(adapter);
INIT_LIST_HEAD(&netdev->napi_list);
kfree(adapter->tx_ring);
kfree(adapter->rx_ring);
adapter->tx_ring = NULL;
adapter->rx_ring = NULL;
netdev->select_queue = &ixgbe_dcb_select_queue;
adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
ixgbe_init_interrupt_scheme(adapter);
if (netif_running(netdev))
netdev->netdev_ops->ndo_open(netdev);
} else {
/* Turn off DCB */
if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
if (netif_running(netdev))
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_reset_interrupt_capability(adapter);
ixgbe_napi_del_all(adapter);
INIT_LIST_HEAD(&netdev->napi_list);
kfree(adapter->tx_ring);
kfree(adapter->rx_ring);
adapter->tx_ring = NULL;
adapter->rx_ring = NULL;
netdev->select_queue = NULL;
adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
ixgbe_init_interrupt_scheme(adapter);
if (netif_running(netdev))
netdev->netdev_ops->ndo_open(netdev);
}
}
out:
return err;
}
/**
* ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
* @adapter: board private structure to initialize
*
* We determine which interrupt scheme to use based on...
* - Kernel support (MSI, MSI-X)
* - which can be user-defined (via MODULE_PARAM)
* - Hardware queue count (num_*_queues)
* - defined by miscellaneous hardware support/features (RSS, etc.)
**/
int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
{
int err;
/* Number of supported queues */
ixgbe_set_num_queues(adapter);
/* Set interrupt mode */
ixgbe_set_interrupt_capability(adapter);
err = ixgbe_alloc_q_vectors(adapter);
if (err) {
e_dev_err("Unable to allocate memory for queue vectors\n");
goto err_alloc_q_vectors;
}
ixgbe_cache_ring_register(adapter);
e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
(adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
adapter->num_rx_queues, adapter->num_tx_queues);
set_bit(__IXGBE_DOWN, &adapter->state);
return 0;
err_alloc_q_vectors:
ixgbe_reset_interrupt_capability(adapter);
return err;
}
/**
* ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
* @adapter: board private structure to clear interrupt scheme on
*
* We go through and clear interrupt specific resources and reset the structure
* to pre-load conditions
**/
void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
{
adapter->num_tx_queues = 0;
adapter->num_rx_queues = 0;
ixgbe_free_q_vectors(adapter);
ixgbe_reset_interrupt_capability(adapter);
}
static int ixgbe_set_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ring)
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
struct ixgbe_ring *temp_ring;
int i, err;
u32 new_rx_count, new_tx_count;
if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
return -EINVAL;
new_rx_count = max(ring->rx_pending, (u32)IXGBE_MIN_RXD);
new_rx_count = min(new_rx_count, (u32)IXGBE_MAX_RXD);
new_rx_count = ALIGN(new_rx_count, IXGBE_REQ_RX_DESCRIPTOR_MULTIPLE);
new_tx_count = max(ring->tx_pending, (u32)IXGBE_MIN_TXD);
new_tx_count = min(new_tx_count, (u32)IXGBE_MAX_TXD);
new_tx_count = ALIGN(new_tx_count, IXGBE_REQ_TX_DESCRIPTOR_MULTIPLE);
if ((new_tx_count == adapter->tx_ring->count) &&
(new_rx_count == adapter->rx_ring->count)) {
/* nothing to do */
return 0;
}
temp_ring = kcalloc(adapter->num_tx_queues,
sizeof(struct ixgbe_ring), GFP_KERNEL);
if (!temp_ring)
return -ENOMEM;
while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
msleep(1);
if (new_tx_count != adapter->tx_ring->count) {
for (i = 0; i < adapter->num_tx_queues; i++) {
temp_ring[i].count = new_tx_count;
err = ixgbe_setup_tx_resources(adapter, &temp_ring[i]);
if (err) {
while (i) {
i--;
ixgbe_free_tx_resources(adapter,
&temp_ring[i]);
}
goto err_setup;
}
temp_ring[i].v_idx = adapter->tx_ring[i].v_idx;
}
if (netif_running(netdev))
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_reset_interrupt_capability(adapter);
ixgbe_napi_del_all(adapter);
INIT_LIST_HEAD(&netdev->napi_list);
kfree(adapter->tx_ring);
adapter->tx_ring = temp_ring;
temp_ring = NULL;
adapter->tx_ring_count = new_tx_count;
}
temp_ring = kcalloc(adapter->num_rx_queues,
sizeof(struct ixgbe_ring), GFP_KERNEL);
if (!temp_ring) {
if (netif_running(netdev))
netdev->netdev_ops->ndo_open(netdev);
return -ENOMEM;
}
if (new_rx_count != adapter->rx_ring->count) {
for (i = 0; i < adapter->num_rx_queues; i++) {
temp_ring[i].count = new_rx_count;
err = ixgbe_setup_rx_resources(adapter, &temp_ring[i]);
if (err) {
while (i) {
i--;
ixgbe_free_rx_resources(adapter,
&temp_ring[i]);
}
goto err_setup;
}
temp_ring[i].v_idx = adapter->rx_ring[i].v_idx;
}
if (netif_running(netdev))
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_reset_interrupt_capability(adapter);
ixgbe_napi_del_all(adapter);
INIT_LIST_HEAD(&netdev->napi_list);
kfree(adapter->rx_ring);
adapter->rx_ring = temp_ring;
temp_ring = NULL;
adapter->rx_ring_count = new_rx_count;
}
/* success! */
err = 0;
err_setup:
ixgbe_init_interrupt_scheme(adapter);
if (netif_running(netdev))
netdev->netdev_ops->ndo_open(netdev);
clear_bit(__IXGBE_RESETTING, &adapter->state);
return err;
}