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bnx2x: add support for receive hashing 

Add support to bnx2x to extract Toeplitz hash out of the receive
descriptor for use in skb->rxhash.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2010-04-23 00:10:52 -07:00 committed by David S. Miller
parent efe91932e7
commit c68ed25526
2 changed files with 19 additions and 9 deletions
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2
drivers/net/bnx2x.h
View File

@ -1330,7 +1330,7 @@ static inline u32 reg_poll(struct bnx2x *bp, u32 reg, u32 expected, int ms,
AEU_INPUTS_ATTN_BITS_MCP_LATCHED_UMP_TX_PARITY | \
AEU_INPUTS_ATTN_BITS_MCP_LATCHED_SCPAD_PARITY)
#define MULTI_FLAGS(bp) \
#define RSS_FLAGS(bp) \
(TSTORM_ETH_FUNCTION_COMMON_CONFIG_RSS_IPV4_CAPABILITY | \
TSTORM_ETH_FUNCTION_COMMON_CONFIG_RSS_IPV4_TCP_CAPABILITY | \
TSTORM_ETH_FUNCTION_COMMON_CONFIG_RSS_IPV6_CAPABILITY | \

26
drivers/net/bnx2x_main.c
View File

@ -1582,7 +1582,7 @@ static int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
struct sw_rx_bd *rx_buf = NULL;
struct sk_buff *skb;
union eth_rx_cqe *cqe;
u8 cqe_fp_flags;
u8 cqe_fp_flags, cqe_fp_status_flags;
u16 len, pad;
comp_ring_cons = RCQ_BD(sw_comp_cons);
@ -1598,6 +1598,7 @@ static int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
cqe = &fp->rx_comp_ring[comp_ring_cons];
cqe_fp_flags = cqe->fast_path_cqe.type_error_flags;
cqe_fp_status_flags = cqe->fast_path_cqe.status_flags;
DP(NETIF_MSG_RX_STATUS, "CQE type %x err %x status %x"
" queue %x vlan %x len %u\n", CQE_TYPE(cqe_fp_flags),
@ -1727,6 +1728,12 @@ reuse_rx:
skb->protocol = eth_type_trans(skb, bp->dev);
if ((bp->dev->features & ETH_FLAG_RXHASH) &&
(cqe_fp_status_flags &
ETH_FAST_PATH_RX_CQE_RSS_HASH_FLG))
skb->rxhash = le32_to_cpu(
cqe->fast_path_cqe.rss_hash_result);
skb->ip_summed = CHECKSUM_NONE;
if (bp->rx_csum) {
if (likely(BNX2X_RX_CSUM_OK(cqe)))
@ -5750,10 +5757,10 @@ static void bnx2x_init_internal_func(struct bnx2x *bp)
u32 offset;
u16 max_agg_size;
if (is_multi(bp)) {
tstorm_config.config_flags = MULTI_FLAGS(bp);
tstorm_config.config_flags = RSS_FLAGS(bp);
if (is_multi(bp))
tstorm_config.rss_result_mask = MULTI_MASK;
}
/* Enable TPA if needed */
if (bp->flags & TPA_ENABLE_FLAG)
@ -6629,10 +6636,8 @@ static int bnx2x_init_common(struct bnx2x *bp)
bnx2x_init_block(bp, PBF_BLOCK, COMMON_STAGE);
REG_WR(bp, SRC_REG_SOFT_RST, 1);
for (i = SRC_REG_KEYRSS0_0; i <= SRC_REG_KEYRSS1_9; i += 4) {
REG_WR(bp, i, 0xc0cac01a);
/* TODO: replace with something meaningful */
}
for (i = SRC_REG_KEYRSS0_0; i <= SRC_REG_KEYRSS1_9; i += 4)
REG_WR(bp, i, random32());
bnx2x_init_block(bp, SRCH_BLOCK, COMMON_STAGE);
#ifdef BCM_CNIC
REG_WR(bp, SRC_REG_KEYSEARCH_0, 0x63285672);
@ -11001,6 +11006,11 @@ static int bnx2x_set_flags(struct net_device *dev, u32 data)
changed = 1;
}
if (data & ETH_FLAG_RXHASH)
dev->features |= NETIF_F_RXHASH;
else
dev->features &= ~NETIF_F_RXHASH;
if (changed && netif_running(dev)) {
bnx2x_nic_unload(bp, UNLOAD_NORMAL);
rc = bnx2x_nic_load(bp, LOAD_NORMAL);