static int ixgbevf_set_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ring)
{
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
struct ixgbevf_ring *tx_ring = NULL, *rx_ring = NULL;
int i, err = 0;
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)IXGBEVF_MIN_RXD);
new_rx_count = min(new_rx_count, (u32)IXGBEVF_MAX_RXD);
new_rx_count = ALIGN(new_rx_count, IXGBE_REQ_RX_DESCRIPTOR_MULTIPLE);
new_tx_count = max(ring->tx_pending, (u32)IXGBEVF_MIN_TXD);
new_tx_count = min(new_tx_count, (u32)IXGBEVF_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;
}
while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
msleep(1);
/*
* If the adapter isn't up and running then just set the
* new parameters and scurry for the exits.
*/
if (!netif_running(adapter->netdev)) {
for (i = 0; i < adapter->num_tx_queues; i++)
adapter->tx_ring[i].count = new_tx_count;
for (i = 0; i < adapter->num_rx_queues; i++)
adapter->rx_ring[i].count = new_rx_count;
adapter->tx_ring_count = new_tx_count;
adapter->rx_ring_count = new_rx_count;
goto clear_reset;
}
tx_ring = kcalloc(adapter->num_tx_queues,
sizeof(struct ixgbevf_ring), GFP_KERNEL);
if (!tx_ring) {
err = -ENOMEM;
goto clear_reset;
}
rx_ring = kcalloc(adapter->num_rx_queues,
sizeof(struct ixgbevf_ring), GFP_KERNEL);
if (!rx_ring) {
err = -ENOMEM;
goto err_rx_setup;
}
ixgbevf_down(adapter);
memcpy(tx_ring, adapter->tx_ring,
adapter->num_tx_queues * sizeof(struct ixgbevf_ring));
for (i = 0; i < adapter->num_tx_queues; i++) {
tx_ring[i].count = new_tx_count;
err = ixgbevf_setup_tx_resources(adapter, &tx_ring[i]);
if (err) {
while (i) {
i--;
ixgbevf_free_tx_resources(adapter,
&tx_ring[i]);
}
goto err_tx_ring_setup;
}
tx_ring[i].v_idx = adapter->tx_ring[i].v_idx;
}
memcpy(rx_ring, adapter->rx_ring,
adapter->num_rx_queues * sizeof(struct ixgbevf_ring));
for (i = 0; i < adapter->num_rx_queues; i++) {
rx_ring[i].count = new_rx_count;
err = ixgbevf_setup_rx_resources(adapter, &rx_ring[i]);
if (err) {
while (i) {
i--;
ixgbevf_free_rx_resources(adapter,
&rx_ring[i]);
}
goto err_rx_ring_setup;
}
rx_ring[i].v_idx = adapter->rx_ring[i].v_idx;
}
/*
* Only switch to new rings if all the prior allocations
* and ring setups have succeeded.
*/
kfree(adapter->tx_ring);
adapter->tx_ring = tx_ring;
adapter->tx_ring_count = new_tx_count;
kfree(adapter->rx_ring);
adapter->rx_ring = rx_ring;
adapter->rx_ring_count = new_rx_count;
/* success! */
ixgbevf_up(adapter);
goto clear_reset;
err_rx_ring_setup:
for(i = 0; i < adapter->num_tx_queues; i++)
ixgbevf_free_tx_resources(adapter, &tx_ring[i]);
err_tx_ring_setup:
kfree(rx_ring);
err_rx_setup:
kfree(tx_ring);
clear_reset:
clear_bit(__IXGBEVF_RESETTING, &adapter->state);
return err;
}
static int ixgbevf_set_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ring)
{
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
struct ixgbevf_ring *tx_ring = NULL, *rx_ring = NULL;
u32 new_rx_count, new_tx_count;
int i, err = 0;
if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
return -EINVAL;
new_tx_count = max_t(u32, ring->tx_pending, IXGBEVF_MIN_TXD);
new_tx_count = min_t(u32, new_tx_count, IXGBEVF_MAX_TXD);
new_tx_count = ALIGN(new_tx_count, IXGBE_REQ_TX_DESCRIPTOR_MULTIPLE);
new_rx_count = max_t(u32, ring->rx_pending, IXGBEVF_MIN_RXD);
new_rx_count = min_t(u32, new_rx_count, IXGBEVF_MAX_RXD);
new_rx_count = ALIGN(new_rx_count, IXGBE_REQ_RX_DESCRIPTOR_MULTIPLE);
/* if nothing to do return success */
if ((new_tx_count == adapter->tx_ring_count) &&
(new_rx_count == adapter->rx_ring_count))
return 0;
while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
usleep_range(1000, 2000);
if (!netif_running(adapter->netdev)) {
for (i = 0; i < adapter->num_tx_queues; i++)
adapter->tx_ring[i]->count = new_tx_count;
for (i = 0; i < adapter->num_rx_queues; i++)
adapter->rx_ring[i]->count = new_rx_count;
adapter->tx_ring_count = new_tx_count;
adapter->rx_ring_count = new_rx_count;
goto clear_reset;
}
if (new_tx_count != adapter->tx_ring_count) {
tx_ring = vmalloc(adapter->num_tx_queues * sizeof(*tx_ring));
if (!tx_ring) {
err = -ENOMEM;
goto clear_reset;
}
for (i = 0; i < adapter->num_tx_queues; i++) {
/* clone ring and setup updated count */
tx_ring[i] = *adapter->tx_ring[i];
tx_ring[i].count = new_tx_count;
err = ixgbevf_setup_tx_resources(&tx_ring[i]);
if (err) {
while (i) {
i--;
ixgbevf_free_tx_resources(&tx_ring[i]);
}
vfree(tx_ring);
tx_ring = NULL;
goto clear_reset;
}
}
}
if (new_rx_count != adapter->rx_ring_count) {
rx_ring = vmalloc(adapter->num_rx_queues * sizeof(*rx_ring));
if (!rx_ring) {
err = -ENOMEM;
goto clear_reset;
}
for (i = 0; i < adapter->num_rx_queues; i++) {
/* clone ring and setup updated count */
rx_ring[i] = *adapter->rx_ring[i];
rx_ring[i].count = new_rx_count;
err = ixgbevf_setup_rx_resources(&rx_ring[i]);
if (err) {
while (i) {
i--;
ixgbevf_free_rx_resources(&rx_ring[i]);
}
vfree(rx_ring);
rx_ring = NULL;
goto clear_reset;
}
}
}
/* bring interface down to prepare for update */
ixgbevf_down(adapter);
/* Tx */
if (tx_ring) {
for (i = 0; i < adapter->num_tx_queues; i++) {
ixgbevf_free_tx_resources(adapter->tx_ring[i]);
*adapter->tx_ring[i] = tx_ring[i];
}
adapter->tx_ring_count = new_tx_count;
vfree(tx_ring);
tx_ring = NULL;
}
/* Rx */
if (rx_ring) {
for (i = 0; i < adapter->num_rx_queues; i++) {
ixgbevf_free_rx_resources(adapter->rx_ring[i]);
*adapter->rx_ring[i] = rx_ring[i];
}
adapter->rx_ring_count = new_rx_count;
vfree(rx_ring);
rx_ring = NULL;
}
/* restore interface using new values */
ixgbevf_up(adapter);
clear_reset:
/* free Tx resources if Rx error is encountered */
if (tx_ring) {
for (i = 0; i < adapter->num_tx_queues; i++)
ixgbevf_free_tx_resources(&tx_ring[i]);
vfree(tx_ring);
}
clear_bit(__IXGBEVF_RESETTING, &adapter->state);
return err;
}
