/**
* ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
* @adapter: board private structure to initialize
*
* We allocate one q_vector per queue interrupt. If allocation fails we
* return -ENOMEM.
**/
static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
{
int q_vectors = adapter->num_q_vectors;
int rxr_remaining = adapter->num_rx_queues;
int txr_remaining = adapter->num_tx_queues;
int rxr_idx = 0, txr_idx = 0, v_idx = 0;
int err;
/* only one q_vector if MSI-X is disabled. */
if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
q_vectors = 1;
if (q_vectors >= (rxr_remaining + txr_remaining)) {
for (; rxr_remaining; v_idx++) {
err = ixgbe_alloc_q_vector(adapter, q_vectors, v_idx,
0, 0, 1, rxr_idx);
if (err)
goto err_out;
/* update counts and index */
rxr_remaining--;
rxr_idx++;
}
}
for (; v_idx < q_vectors; v_idx++) {
int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - v_idx);
int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - v_idx);
err = ixgbe_alloc_q_vector(adapter, q_vectors, v_idx,
tqpv, txr_idx,
rqpv, rxr_idx);
if (err)
goto err_out;
/* update counts and index */
rxr_remaining -= rqpv;
txr_remaining -= tqpv;
rxr_idx++;
txr_idx++;
}
return 0;
err_out:
adapter->num_tx_queues = 0;
adapter->num_rx_queues = 0;
adapter->num_q_vectors = 0;
while (v_idx--)
ixgbe_free_q_vector(adapter, v_idx);
return -ENOMEM;
}
/**
* ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
* @adapter: board private structure to initialize
*
* This function frees the memory allocated to the q_vectors. In addition if
* NAPI is enabled it will delete any references to the NAPI struct prior
* to freeing the q_vector.
**/
static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
{
int v_idx = adapter->num_q_vectors;
adapter->num_tx_queues = 0;
adapter->num_rx_queues = 0;
adapter->num_q_vectors = 0;
while (v_idx--)
ixgbe_free_q_vector(adapter, v_idx);
}
/**
* ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
* @adapter: board private structure to initialize
*
* This function frees the memory allocated to the q_vectors. In addition if
* NAPI is enabled it will delete any references to the NAPI struct prior
* to freeing the q_vector.
**/
static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
{
int v_idx, q_vectors;
if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
else
q_vectors = 1;
for (v_idx = 0; v_idx < q_vectors; v_idx++)
ixgbe_free_q_vector(adapter, v_idx);
}