From 3ceb90fd4898853cdac43084f0c6ee7270cb15f3 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Fri, 26 Aug 2011 07:46:03 +0000 Subject: [PATCH] igb: leave staterr in place and instead us a helper function to check bits Instead of doing a byte swap on the staterr bits in the Rx descriptor we can save ourselves a bit of space and some CPU time by instead just testing for the various bits out of the Rx descriptor directly. Signed-off-by: Alexander Duyck Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/igb/igb.h | 7 +++ drivers/net/ethernet/intel/igb/igb_ethtool.c | 5 +- drivers/net/ethernet/intel/igb/igb_main.c | 55 +++++++++++--------- 3 files changed, 39 insertions(+), 28 deletions(-) diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h index fde381a9d23c..11d17f14aeeb 100644 --- a/drivers/net/ethernet/intel/igb/igb.h +++ b/drivers/net/ethernet/intel/igb/igb.h @@ -259,6 +259,13 @@ enum e1000_ring_flags_t { #define IGB_TX_CTXTDESC(R, i) \ (&(((struct e1000_adv_tx_context_desc *)((R)->desc))[i])) +/* igb_test_staterr - tests bits within Rx descriptor status and error fields */ +static inline __le32 igb_test_staterr(union e1000_adv_rx_desc *rx_desc, + const u32 stat_err_bits) +{ + return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits); +} + /* igb_desc_unused - calculate if we have unused descriptors */ static inline int igb_desc_unused(struct igb_ring *ring) { diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c index 5ebe992010d6..bc198ea2bc14 100644 --- a/drivers/net/ethernet/intel/igb/igb_ethtool.c +++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c @@ -1581,16 +1581,14 @@ static int igb_clean_test_rings(struct igb_ring *rx_ring, union e1000_adv_rx_desc *rx_desc; struct igb_rx_buffer *rx_buffer_info; struct igb_tx_buffer *tx_buffer_info; - u32 staterr; u16 rx_ntc, tx_ntc, count = 0; /* initialize next to clean and descriptor values */ rx_ntc = rx_ring->next_to_clean; tx_ntc = tx_ring->next_to_clean; rx_desc = IGB_RX_DESC(rx_ring, rx_ntc); - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); - while (staterr & E1000_RXD_STAT_DD) { + while (igb_test_staterr(rx_desc, E1000_RXD_STAT_DD)) { /* check rx buffer */ rx_buffer_info = &rx_ring->rx_buffer_info[rx_ntc]; @@ -1619,7 +1617,6 @@ static int igb_clean_test_rings(struct igb_ring *rx_ring, /* fetch next descriptor */ rx_desc = IGB_RX_DESC(rx_ring, rx_ntc); - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); } /* re-map buffers to ring, store next to clean values */ diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index cae4abb48501..1419ae89e29c 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -5790,12 +5790,13 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector) } static inline void igb_rx_checksum(struct igb_ring *ring, - u32 status_err, struct sk_buff *skb) + union e1000_adv_rx_desc *rx_desc, + struct sk_buff *skb) { skb_checksum_none_assert(skb); /* Ignore Checksum bit is set */ - if (status_err & E1000_RXD_STAT_IXSM) + if (igb_test_staterr(rx_desc, E1000_RXD_STAT_IXSM)) return; /* Rx checksum disabled via ethtool */ @@ -5803,8 +5804,9 @@ static inline void igb_rx_checksum(struct igb_ring *ring, return; /* TCP/UDP checksum error bit is set */ - if (status_err & - (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) { + if (igb_test_staterr(rx_desc, + E1000_RXDEXT_STATERR_TCPE | + E1000_RXDEXT_STATERR_IPE)) { /* * work around errata with sctp packets where the TCPE aka * L4E bit is set incorrectly on 64 byte (60 byte w/o crc) @@ -5820,19 +5822,26 @@ static inline void igb_rx_checksum(struct igb_ring *ring, return; } /* It must be a TCP or UDP packet with a valid checksum */ - if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)) + if (igb_test_staterr(rx_desc, E1000_RXD_STAT_TCPCS | + E1000_RXD_STAT_UDPCS)) skb->ip_summed = CHECKSUM_UNNECESSARY; - dev_dbg(ring->dev, "cksum success: bits %08X\n", status_err); + dev_dbg(ring->dev, "cksum success: bits %08X\n", + le32_to_cpu(rx_desc->wb.upper.status_error)); } -static void igb_rx_hwtstamp(struct igb_q_vector *q_vector, u32 staterr, - struct sk_buff *skb) +static void igb_rx_hwtstamp(struct igb_q_vector *q_vector, + union e1000_adv_rx_desc *rx_desc, + struct sk_buff *skb) { struct igb_adapter *adapter = q_vector->adapter; struct e1000_hw *hw = &adapter->hw; u64 regval; + if (!igb_test_staterr(rx_desc, E1000_RXDADV_STAT_TSIP | + E1000_RXDADV_STAT_TS)) + return; + /* * If this bit is set, then the RX registers contain the time stamp. No * other packet will be time stamped until we read these registers, so @@ -5844,7 +5853,7 @@ static void igb_rx_hwtstamp(struct igb_q_vector *q_vector, u32 staterr, * If nothing went wrong, then it should have a shared tx_flags that we * can turn into a skb_shared_hwtstamps. */ - if (staterr & E1000_RXDADV_STAT_TSIP) { + if (igb_test_staterr(rx_desc, E1000_RXDADV_STAT_TSIP)) { u32 *stamp = (u32 *)skb->data; regval = le32_to_cpu(*(stamp + 2)); regval |= (u64)le32_to_cpu(*(stamp + 3)) << 32; @@ -5878,14 +5887,12 @@ static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, int budget) union e1000_adv_rx_desc *rx_desc; const int current_node = numa_node_id(); unsigned int total_bytes = 0, total_packets = 0; - u32 staterr; u16 cleaned_count = igb_desc_unused(rx_ring); u16 i = rx_ring->next_to_clean; rx_desc = IGB_RX_DESC(rx_ring, i); - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); - while (staterr & E1000_RXD_STAT_DD) { + while (igb_test_staterr(rx_desc, E1000_RXD_STAT_DD)) { struct igb_rx_buffer *buffer_info = &rx_ring->rx_buffer_info[i]; struct sk_buff *skb = buffer_info->skb; union e1000_adv_rx_desc *next_rxd; @@ -5938,7 +5945,7 @@ static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, int budget) buffer_info->page_dma = 0; } - if (!(staterr & E1000_RXD_STAT_EOP)) { + if (!igb_test_staterr(rx_desc, E1000_RXD_STAT_EOP)) { struct igb_rx_buffer *next_buffer; next_buffer = &rx_ring->rx_buffer_info[i]; buffer_info->skb = next_buffer->skb; @@ -5948,25 +5955,26 @@ static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, int budget) goto next_desc; } - if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) { + if (igb_test_staterr(rx_desc, + E1000_RXDEXT_ERR_FRAME_ERR_MASK)) { dev_kfree_skb_any(skb); goto next_desc; } - if (staterr & (E1000_RXDADV_STAT_TSIP | E1000_RXDADV_STAT_TS)) - igb_rx_hwtstamp(q_vector, staterr, skb); - total_bytes += skb->len; - total_packets++; - - igb_rx_checksum(rx_ring, staterr, skb); - - skb->protocol = eth_type_trans(skb, rx_ring->netdev); + igb_rx_hwtstamp(q_vector, rx_desc, skb); + igb_rx_checksum(rx_ring, rx_desc, skb); - if (staterr & E1000_RXD_STAT_VP) { + if (igb_test_staterr(rx_desc, E1000_RXD_STAT_VP)) { u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan); __vlan_hwaccel_put_tag(skb, vid); } + + total_bytes += skb->len; + total_packets++; + + skb->protocol = eth_type_trans(skb, rx_ring->netdev); + napi_gro_receive(&q_vector->napi, skb); budget--; @@ -5983,7 +5991,6 @@ next_desc: /* use prefetched values */ rx_desc = next_rxd; - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); } rx_ring->next_to_clean = i; -- 2.20.1