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ixgbe: Move max frame size and Rx buffer length configuration into a function 

This change consolidates all of the Rx max frame size and Rx buffer length
configuration into a single function.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2010-08-19 13:38:11 +00:00 committed by David S. Miller
parent 826437d3de
commit 477de6ed02
1 changed files with 60 additions and 48 deletions
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108
drivers/net/ixgbe/ixgbe_main.c
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@ -2695,25 +2695,15 @@ static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
psrtype);
}
/**
* ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
* @adapter: board private structure
*
* Configure the Rx unit of the MAC after a reset.
**/
static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
struct ixgbe_ring *rx_ring;
struct net_device *netdev = adapter->netdev;
int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
int i;
u32 rxctrl;
u32 hlreg0, gcr_ext;
u32 rdrxctl;
int rx_buf_len;
ixgbe_setup_psrtype(adapter);
struct ixgbe_ring *rx_ring;
int i;
u32 mhadd, hlreg0;
/* Decide whether to use packet split mode or not */
/* Do not use packet split if we're in SR-IOV Mode */
@ -2728,24 +2718,29 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
(netdev->mtu <= ETH_DATA_LEN))
rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
else
rx_buf_len = ALIGN(max_frame, 1024);
rx_buf_len = ALIGN(max_frame + VLAN_HLEN, 1024);
}
#ifdef IXGBE_FCOE
/* adjust max frame to be able to do baby jumbo for FCoE */
if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
(max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
#endif /* IXGBE_FCOE */
mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
mhadd &= ~IXGBE_MHADD_MFS_MASK;
mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
}
hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
if (adapter->netdev->mtu <= ETH_DATA_LEN)
hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
else
hlreg0 |= IXGBE_HLREG0_JUMBOEN;
#ifdef IXGBE_FCOE
if (netdev->features & NETIF_F_FCOE_MTU)
hlreg0 |= IXGBE_HLREG0_JUMBOEN;
#endif
/* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
hlreg0 |= IXGBE_HLREG0_JUMBOEN;
IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
/* disable receives while setting up the descriptors */
rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
/*
* Setup the HW Rx Head and Tail Descriptor Pointers and
* the Base and Length of the Rx Descriptor Ring
@ -2760,7 +2755,8 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
#ifdef IXGBE_FCOE
if (netdev->features & NETIF_F_FCOE_MTU) {
if (netdev->features & NETIF_F_FCOE_MTU)
{
struct ixgbe_ring_feature *f;
f = &adapter->ring_feature[RING_F_FCOE];
if ((i >= f->mask) && (i < f->mask + f->indices)) {
@ -2770,8 +2766,41 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
IXGBE_FCOE_JUMBO_FRAME_SIZE;
}
}
#endif /* IXGBE_FCOE */
}
}
/**
* ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
* @adapter: board private structure
*
* Configure the Rx unit of the MAC after a reset.
**/
static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
struct ixgbe_ring *rx_ring;
int i;
u32 rxctrl;
u32 gcr_ext;
u32 rdrxctl;
/* disable receives while setting up the descriptors */
rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
ixgbe_setup_psrtype(adapter);
/* set_rx_buffer_len must be called before ring initialization */
ixgbe_set_rx_buffer_len(adapter);
/*
* Setup the HW Rx Head and Tail Descriptor Pointers and
* the Base and Length of the Rx Descriptor Ring
*/
for (i = 0; i < adapter->num_rx_queues; i++) {
rx_ring = adapter->rx_ring[i];
ixgbe_configure_rx_ring(adapter, rx_ring);
ixgbe_configure_srrctl(adapter, rx_ring);
}
@ -3322,13 +3351,11 @@ static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
struct ixgbe_hw *hw = &adapter->hw;
int i, j = 0;
int num_rx_rings = adapter->num_rx_queues;
int err;
int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
u32 txdctl, rxdctl, mhadd;
u32 txdctl, rxdctl;
u32 dmatxctl;
u32 gpie;
u32 ctrl_ext;
@ -3395,21 +3422,6 @@ static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
}
#ifdef IXGBE_FCOE
/* adjust max frame to be able to do baby jumbo for FCoE */
if ((netdev->features & NETIF_F_FCOE_MTU) &&
(max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
#endif /* IXGBE_FCOE */
mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
mhadd &= ~IXGBE_MHADD_MFS_MASK;
mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
}
if (hw->mac.type == ixgbe_mac_82599EB) {
/* DMATXCTL.EN must be set after all Tx queue config is done */
dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
@ -3522,7 +3534,7 @@ static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
&(adapter->tx_ring[i]->reinit_state));
/* enable transmits */
netif_tx_start_all_queues(netdev);
netif_tx_start_all_queues(adapter->netdev);
/* bring the link up in the watchdog, this could race with our first
* link up interrupt but shouldn't be a problem */