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sky2: jumbo packet changes 

Change how FIFO is programmed in jumbo mode (to match vendor driver).
Mostly cosmetic, the only register change is that the bits 22,23
are not programemd used.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2010-02-12 06:58:01 +00:00 committed by David S. Miller
parent 87b09f1f25
commit 44dde56d37
2 changed files with 18 additions and 26 deletions
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36
drivers/net/sky2.c
View File

@ -798,29 +798,15 @@ static void sky2_set_tx_stfwd(struct sky2_hw *hw, unsigned port)
hw->chip_rev != CHIP_REV_YU_EX_A0) ||
hw->chip_id >= CHIP_ID_YUKON_FE_P) {
/* Yukon-Extreme B0 and further Extreme devices */
/* enable Store & Forward mode for TX */
sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T), TX_STFW_ENA);
} else if (dev->mtu > ETH_DATA_LEN) {
/* set Tx GMAC FIFO Almost Empty Threshold */
sky2_write32(hw, SK_REG(port, TX_GMF_AE_THR),
(ECU_JUMBO_WM << 16) | ECU_AE_THR);
if (dev->mtu <= ETH_DATA_LEN)
sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T),
TX_JUMBO_DIS | TX_STFW_ENA);
else
sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T),
TX_JUMBO_ENA| TX_STFW_ENA);
} else {
if (dev->mtu <= ETH_DATA_LEN)
sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T), TX_STFW_ENA);
else {
/* set Tx GMAC FIFO Almost Empty Threshold */
sky2_write32(hw, SK_REG(port, TX_GMF_AE_THR),
(ECU_JUMBO_WM << 16) | ECU_AE_THR);
sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T), TX_STFW_DIS);
/* Can't do offload because of lack of store/forward */
dev->features &= ~(NETIF_F_TSO | NETIF_F_SG | NETIF_F_ALL_CSUM);
}
}
sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T), TX_STFW_DIS);
} else
sky2_write32(hw, SK_REG(port, TX_GMF_CTRL_T), TX_STFW_ENA);
}
static void sky2_mac_init(struct sky2_hw *hw, unsigned port)
@ -2206,14 +2192,20 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu)
u16 ctl, mode;
u32 imask;
/* MTU size outside the spec */
if (new_mtu < ETH_ZLEN || new_mtu > ETH_JUMBO_MTU)
return -EINVAL;
/* MTU > 1500 on yukon FE and FE+ not allowed */
if (new_mtu > ETH_DATA_LEN &&
(hw->chip_id == CHIP_ID_YUKON_FE ||
hw->chip_id == CHIP_ID_YUKON_FE_P))
return -EINVAL;
/* TSO, etc on Yukon Ultra and MTU > 1500 not supported */
if (new_mtu > ETH_DATA_LEN && hw->chip_id == CHIP_ID_YUKON_EC_U)
dev->features &= ~(NETIF_F_TSO|NETIF_F_SG|NETIF_F_ALL_CSUM);
if (!netif_running(dev)) {
dev->mtu = new_mtu;
return 0;

8
drivers/net/sky2.h
View File

@ -1895,14 +1895,14 @@ enum {
/* TX_GMF_CTRL_T 32 bit Tx GMAC FIFO Control/Test */
enum {
TX_STFW_DIS = 1<<31,/* Disable Store & Forward (Yukon-EC Ultra) */
TX_STFW_ENA = 1<<30,/* Enable Store & Forward (Yukon-EC Ultra) */
TX_STFW_DIS = 1<<31,/* Disable Store & Forward */
TX_STFW_ENA = 1<<30,/* Enable Store & Forward */
TX_VLAN_TAG_ON = 1<<25,/* enable VLAN tagging */
TX_VLAN_TAG_OFF = 1<<24,/* disable VLAN tagging */
TX_JUMBO_ENA = 1<<23,/* PCI Jumbo Mode enable (Yukon-EC Ultra) */
TX_JUMBO_DIS = 1<<22,/* PCI Jumbo Mode enable (Yukon-EC Ultra) */
TX_PCI_JUM_ENA = 1<<23,/* PCI Jumbo Mode enable */
TX_PCI_JUM_DIS = 1<<22,/* PCI Jumbo Mode enable */
GMF_WSP_TST_ON = 1<<18,/* Write Shadow Pointer Test On */
GMF_WSP_TST_OFF = 1<<17,/* Write Shadow Pointer Test Off */