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ixgbe: move rx queue RSC configuration to a separate function 

Shorten ixgbe_configure_rx() and lessen indent depth.

Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Don Skidmore <donald.c.skidmore@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:
Nelson, Shannon 2009-09-18 09:46:27 +00:00 committed by David S. Miller
parent f7554a2bf2
commit bb5a9ad2b8
1 changed files with 47 additions and 31 deletions
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78
drivers/net/ixgbe/ixgbe_main.c
View File

@ -1969,6 +1969,50 @@ static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
return mrqc;
}
/**
* ixgbe_configure_rscctl - enable RSC for the indicated ring
* @adapter: address of board private structure
* @index: index of ring to set
* @rx_buf_len: rx buffer length
**/
static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter, int index,
int rx_buf_len)
{
struct ixgbe_ring *rx_ring;
struct ixgbe_hw *hw = &adapter->hw;
int j;
u32 rscctrl;
rx_ring = &adapter->rx_ring[index];
j = rx_ring->reg_idx;
rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
rscctrl |= IXGBE_RSCCTL_RSCEN;
/*
* we must limit the number of descriptors so that the
* total size of max desc * buf_len is not greater
* than 65535
*/
if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
#if (MAX_SKB_FRAGS > 16)
rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
#elif (MAX_SKB_FRAGS > 8)
rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
#elif (MAX_SKB_FRAGS > 4)
rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
#else
rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
#endif
} else {
if (rx_buf_len < IXGBE_RXBUFFER_4096)
rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
else if (rx_buf_len < IXGBE_RXBUFFER_8192)
rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
else
rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
}
IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
}
/**
* ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
* @adapter: board private structure
@ -1990,7 +2034,6 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
u32 fctrl, hlreg0;
u32 reta = 0, mrqc = 0;
u32 rdrxctl;
u32 rscctrl;
int rx_buf_len;
/* Decide whether to use packet split mode or not */
@ -2148,36 +2191,9 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
/* Enable 82599 HW-RSC */
for (i = 0; i < adapter->num_rx_queues; i++) {
rx_ring = &adapter->rx_ring[i];
j = rx_ring->reg_idx;
rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
rscctrl |= IXGBE_RSCCTL_RSCEN;
/*
* we must limit the number of descriptors so that the
* total size of max desc * buf_len is not greater
* than 65535
*/
if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
#if (MAX_SKB_FRAGS > 16)
rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
#elif (MAX_SKB_FRAGS > 8)
rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
#elif (MAX_SKB_FRAGS > 4)
rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
#else
rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
#endif
} else {
if (rx_buf_len < IXGBE_RXBUFFER_4096)
rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
else if (rx_buf_len < IXGBE_RXBUFFER_8192)
rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
else
rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
}
IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
}
for (i = 0; i < adapter->num_rx_queues; i++)
ixgbe_configure_rscctl(adapter, i, rx_buf_len);
/* Disable RSC for ACK packets */
IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
(IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));