FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-16 22:10:24 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

sky2: add support for receive hashing

Browse Source 
Sky2 hardware supports hardware receive hash calculation.
Now that Receive Packet Steering is available, add support
to enable it.

This version does not depend on CONFIG_RPS. Also set_flags rejects
all values except RXHASH, so driver won't have to change next time
somebody adds a new one.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2010-04-24 20:04:12 -07:00 committed by David S. Miller
parent b7d6a43211
commit bf73130d7f
2 changed files with 91 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

79
drivers/net/sky2.c
View File

@ -1193,6 +1193,39 @@ static void rx_set_checksum(struct sky2_port *sky2)
? BMU_ENA_RX_CHKSUM : BMU_DIS_RX_CHKSUM);
}
/* Enable/disable receive hash calculation (RSS) */
static void rx_set_rss(struct net_device *dev)
{
struct sky2_port *sky2 = netdev_priv(dev);
struct sky2_hw *hw = sky2->hw;
int i, nkeys = 4;
/* Supports IPv6 and other modes */
if (hw->flags & SKY2_HW_NEW_LE) {
nkeys = 10;
sky2_write32(hw, SK_REG(sky2->port, RSS_CFG), HASH_ALL);
}
/* Program RSS initial values */
if (dev->features & NETIF_F_RXHASH) {
u32 key[nkeys];
get_random_bytes(key, nkeys * sizeof(u32));
for (i = 0; i < nkeys; i++)
sky2_write32(hw, SK_REG(sky2->port, RSS_KEY + i * 4),
key[i]);
/* Need to turn on (undocumented) flag to make hashing work */
sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T),
RX_STFW_ENA);
sky2_write32(hw, Q_ADDR(rxqaddr[sky2->port], Q_CSR),
BMU_ENA_RX_RSS_HASH);
} else
sky2_write32(hw, Q_ADDR(rxqaddr[sky2->port], Q_CSR),
BMU_DIS_RX_RSS_HASH);
}
/*
* The RX Stop command will not work for Yukon-2 if the BMU does not
* reach the end of packet and since we can't make sure that we have
@ -1425,6 +1458,9 @@ static void sky2_rx_start(struct sky2_port *sky2)
if (!(hw->flags & SKY2_HW_NEW_LE))
rx_set_checksum(sky2);
if (!(hw->flags & SKY2_HW_RSS_BROKEN))
rx_set_rss(sky2->netdev);
/* submit Rx ring */
for (i = 0; i < sky2->rx_pending; i++) {
re = sky2->rx_ring + i;
@ -2534,6 +2570,14 @@ static void sky2_rx_checksum(struct sky2_port *sky2, u32 status)
}
}
static void sky2_rx_hash(struct sky2_port *sky2, u32 status)
{
struct sk_buff *skb;
skb = sky2->rx_ring[sky2->rx_next].skb;
skb->rxhash = le32_to_cpu(status);
}
/* Process status response ring */
static int sky2_status_intr(struct sky2_hw *hw, int to_do, u16 idx)
{
@ -2606,6 +2650,10 @@ static int sky2_status_intr(struct sky2_hw *hw, int to_do, u16 idx)
sky2_rx_checksum(sky2, status);
break;
case OP_RSS_HASH:
sky2_rx_hash(sky2, status);
break;
case OP_TXINDEXLE:
/* TX index reports status for both ports */
sky2_tx_done(hw->dev[0], status & 0xfff);
@ -2960,6 +3008,8 @@ static int __devinit sky2_init(struct sky2_hw *hw)
switch(hw->chip_id) {
case CHIP_ID_YUKON_XL:
hw->flags = SKY2_HW_GIGABIT | SKY2_HW_NEWER_PHY;
if (hw->chip_rev < CHIP_REV_YU_XL_A2)
hw->flags |= SKY2_HW_RSS_BROKEN;
break;
case CHIP_ID_YUKON_EC_U:
@ -2985,10 +3035,11 @@ static int __devinit sky2_init(struct sky2_hw *hw)
dev_err(&hw->pdev->dev, "unsupported revision Yukon-EC rev A1\n");
return -EOPNOTSUPP;
}
hw->flags = SKY2_HW_GIGABIT;
hw->flags = SKY2_HW_GIGABIT | SKY2_HW_RSS_BROKEN;
break;
case CHIP_ID_YUKON_FE:
hw->flags = SKY2_HW_RSS_BROKEN;
break;
case CHIP_ID_YUKON_FE_P:
@ -4112,6 +4163,25 @@ static int sky2_set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom
return sky2_vpd_write(sky2->hw, cap, data, eeprom->offset, eeprom->len);
}
static int sky2_set_flags(struct net_device *dev, u32 data)
{
struct sky2_port *sky2 = netdev_priv(dev);
if (data & ~ETH_FLAG_RXHASH)
return -EOPNOTSUPP;
if (data & ETH_FLAG_RXHASH) {
if (sky2->hw->flags & SKY2_HW_RSS_BROKEN)
return -EINVAL;
dev->features |= NETIF_F_RXHASH;
} else
dev->features &= ~NETIF_F_RXHASH;
rx_set_rss(dev);
return 0;
}
static const struct ethtool_ops sky2_ethtool_ops = {
.get_settings = sky2_get_settings,
@ -4143,6 +4213,7 @@ static const struct ethtool_ops sky2_ethtool_ops = {
.phys_id = sky2_phys_id,
.get_sset_count = sky2_get_sset_count,
.get_ethtool_stats = sky2_get_ethtool_stats,
.set_flags = sky2_set_flags,
};
#ifdef CONFIG_SKY2_DEBUG
@ -4496,6 +4567,10 @@ static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
if (highmem)
dev->features |= NETIF_F_HIGHDMA;
/* Enable receive hashing unless hardware is known broken */
if (!(hw->flags & SKY2_HW_RSS_BROKEN))
dev->features |= NETIF_F_RXHASH;
#ifdef SKY2_VLAN_TAG_USED
/* The workaround for FE+ status conflicts with VLAN tag detection. */
if (!(sky2->hw->chip_id == CHIP_ID_YUKON_FE_P &&
@ -4692,7 +4767,7 @@ static int __devinit sky2_probe(struct pci_dev *pdev,
goto err_out_iounmap;
/* ring for status responses */
hw->st_size = hw->ports * roundup_pow_of_two(2*RX_MAX_PENDING + TX_MAX_PENDING);
hw->st_size = hw->ports * roundup_pow_of_two(3*RX_MAX_PENDING + TX_MAX_PENDING);
hw->st_le = pci_alloc_consistent(pdev, hw->st_size * sizeof(struct sky2_status_le),
&hw->st_dma);
if (!hw->st_le)

14
drivers/net/sky2.h
View File

@ -694,8 +694,21 @@ enum {
TXA_CTRL = 0x0210,/* 8 bit Tx Arbiter Control Register */
TXA_TEST = 0x0211,/* 8 bit Tx Arbiter Test Register */
TXA_STAT = 0x0212,/* 8 bit Tx Arbiter Status Register */
RSS_KEY = 0x0220, /* RSS Key setup */
RSS_CFG = 0x0248, /* RSS Configuration */
};
enum {
HASH_TCP_IPV6_EX_CTRL = 1<<5,
HASH_IPV6_EX_CTRL = 1<<4,
HASH_TCP_IPV6_CTRL = 1<<3,
HASH_IPV6_CTRL = 1<<2,
HASH_TCP_IPV4_CTRL = 1<<1,
HASH_IPV4_CTRL = 1<<0,
HASH_ALL = 0x3f,
};
enum {
B6_EXT_REG = 0x0300,/* External registers (GENESIS only) */
@ -2261,6 +2274,7 @@ struct sky2_hw {
#define SKY2_HW_NEW_LE 0x00000020 /* new LSOv2 format */
#define SKY2_HW_AUTO_TX_SUM 0x00000040 /* new IP decode for Tx */
#define SKY2_HW_ADV_POWER_CTL 0x00000080 /* additional PHY power regs */
#define SKY2_HW_RSS_BROKEN 0x00000100
u8 chip_id;
u8 chip_rev;