/**
* ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
* @adapter: board private structure to initialize
*
* FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
* The ring feature mask is not used as a mask for FCoE, as it can take any 8
* rx queues out of the max number of rx queues, instead, it is used as the
* index of the first rx queue used by FCoE.
*
**/
static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
{
struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
return false;
f->indices = min_t(int, num_online_cpus(), f->indices);
adapter->num_rx_queues = 1;
adapter->num_tx_queues = 1;
if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
e_info(probe, "FCoE enabled with RSS\n");
if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
ixgbe_set_fdir_queues(adapter);
else
ixgbe_set_rss_queues(adapter);
}
/* adding FCoE rx rings to the end */
f->mask = adapter->num_rx_queues;
adapter->num_rx_queues += f->indices;
adapter->num_tx_queues += f->indices;
return true;
}
/**
* ixgbe_set_num_queues: Allocate queues for device, feature dependent
* @adapter: board private structure to initialize
*
* This is the top level queue allocation routine. The order here is very
* important, starting with the "most" number of features turned on at once,
* and ending with the smallest set of features. This way large combinations
* can be allocated if they're turned on, and smaller combinations are the
* fallthrough conditions.
*
**/
static int ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
{
/* Start with base case */
adapter->num_rx_queues = 1;
adapter->num_tx_queues = 1;
adapter->num_rx_pools = adapter->num_rx_queues;
adapter->num_rx_queues_per_pool = 1;
if (ixgbe_set_sriov_queues(adapter))
goto done;
#ifdef CONFIG_IXGBE_DCB
if (ixgbe_set_dcb_queues(adapter))
goto done;
#endif
#ifdef IXGBE_FCOE
if (ixgbe_set_fcoe_queues(adapter))
goto done;
#endif /* IXGBE_FCOE */
if (ixgbe_set_fdir_queues(adapter))
goto done;
if (ixgbe_set_rss_queues(adapter))
goto done;
/* fallback to base case */
adapter->num_rx_queues = 1;
adapter->num_tx_queues = 1;
done:
if ((adapter->netdev->reg_state == NETREG_UNREGISTERED) ||
(adapter->netdev->reg_state == NETREG_UNREGISTERING))
return 0;
/* Notify the stack of the (possibly) reduced queue counts. */
netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
return netif_set_real_num_rx_queues(adapter->netdev,
adapter->num_rx_queues);
}
/**
* ixgbe_set_num_queues - Allocate queues for device, feature dependent
* @adapter: board private structure to initialize
*
* This is the top level queue allocation routine. The order here is very
* important, starting with the "most" number of features turned on at once,
* and ending with the smallest set of features. This way large combinations
* can be allocated if they're turned on, and smaller combinations are the
* fallthrough conditions.
*
**/
static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
{
/* Start with base case */
adapter->num_rx_queues = 1;
adapter->num_tx_queues = 1;
adapter->num_rx_pools = adapter->num_rx_queues;
adapter->num_rx_queues_per_pool = 1;
#ifdef CONFIG_IXGBE_DCB
if (ixgbe_set_dcb_sriov_queues(adapter))
return;
if (ixgbe_set_dcb_queues(adapter))
return;
#endif
if (ixgbe_set_sriov_queues(adapter))
return;
ixgbe_set_rss_queues(adapter);
}
