diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c index 644975da2857..e1847ce6308d 100644 --- a/drivers/net/ethernet/cadence/macb.c +++ b/drivers/net/ethernet/cadence/macb.c @@ -37,11 +37,16 @@ #define MACB_RX_BUFFER_SIZE 128 #define RX_BUFFER_MULTIPLE 64 /* bytes */ + #define DEFAULT_RX_RING_SIZE 512 /* must be power of 2 */ +#define MIN_RX_RING_SIZE 64 +#define MAX_RX_RING_SIZE 8192 #define RX_RING_BYTES(bp) (sizeof(struct macb_dma_desc) \ * (bp)->rx_ring_size) #define DEFAULT_TX_RING_SIZE 512 /* must be power of 2 */ +#define MIN_TX_RING_SIZE 64 +#define MAX_TX_RING_SIZE 4096 #define TX_RING_BYTES(bp) (sizeof(struct macb_dma_desc) \ * (bp)->tx_ring_size) @@ -2211,6 +2216,56 @@ static int macb_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol) return 0; } +static void macb_get_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct macb *bp = netdev_priv(netdev); + + ring->rx_max_pending = MAX_RX_RING_SIZE; + ring->tx_max_pending = MAX_TX_RING_SIZE; + + ring->rx_pending = bp->rx_ring_size; + ring->tx_pending = bp->tx_ring_size; +} + +static int macb_set_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + struct macb *bp = netdev_priv(netdev); + u32 new_rx_size, new_tx_size; + unsigned int reset = 0; + + if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending)) + return -EINVAL; + + new_rx_size = clamp_t(u32, ring->rx_pending, + MIN_RX_RING_SIZE, MAX_RX_RING_SIZE); + new_rx_size = roundup_pow_of_two(new_rx_size); + + new_tx_size = clamp_t(u32, ring->tx_pending, + MIN_TX_RING_SIZE, MAX_TX_RING_SIZE); + new_tx_size = roundup_pow_of_two(new_tx_size); + + if ((new_tx_size == bp->tx_ring_size) && + (new_rx_size == bp->rx_ring_size)) { + /* nothing to do */ + return 0; + } + + if (netif_running(bp->dev)) { + reset = 1; + macb_close(bp->dev); + } + + bp->rx_ring_size = new_rx_size; + bp->tx_ring_size = new_tx_size; + + if (reset) + macb_open(bp->dev); + + return 0; +} + static const struct ethtool_ops macb_ethtool_ops = { .get_regs_len = macb_get_regs_len, .get_regs = macb_get_regs, @@ -2220,6 +2275,8 @@ static const struct ethtool_ops macb_ethtool_ops = { .set_wol = macb_set_wol, .get_link_ksettings = phy_ethtool_get_link_ksettings, .set_link_ksettings = phy_ethtool_set_link_ksettings, + .get_ringparam = macb_get_ringparam, + .set_ringparam = macb_set_ringparam, }; static const struct ethtool_ops gem_ethtool_ops = { @@ -2232,6 +2289,8 @@ static const struct ethtool_ops gem_ethtool_ops = { .get_sset_count = gem_get_sset_count, .get_link_ksettings = phy_ethtool_get_link_ksettings, .set_link_ksettings = phy_ethtool_set_link_ksettings, + .get_ringparam = macb_get_ringparam, + .set_ringparam = macb_set_ringparam, }; static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |