ixgbe: add LRO support
Support for in-kernel LRO with the ability to enable/disable via ethtool based on comments from Ben Hutchings. Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: PJ Waskiewicz <peter.p.waskiewicz.jr@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Mallikarjuna R Chilakala
Jeff Garzik
Родитель
8f85cd7fef
Коммит
177db6ffd0
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@ -2471,7 +2471,8 @@ config EHEA
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config IXGBE
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tristate "Intel(R) 10GbE PCI Express adapters support"
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depends on PCI
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depends on PCI && INET
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select INET_LRO
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---help---
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This driver supports Intel(R) 10GbE PCI Express family of
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adapters. For more information on how to identify your adapter, go
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@ -32,6 +32,7 @@
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/netdevice.h>
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#include <linux/inet_lro.h>
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#include "ixgbe_type.h"
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#include "ixgbe_common.h"
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@ -100,6 +101,9 @@
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#define IXGBE_TX_FLAGS_VLAN_MASK 0xffff0000
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#define IXGBE_TX_FLAGS_VLAN_SHIFT 16
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#define IXGBE_MAX_LRO_DESCRIPTORS 8
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#define IXGBE_MAX_LRO_AGGREGATE 32
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/* wrapper around a pointer to a socket buffer,
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* so a DMA handle can be stored along with the buffer */
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struct ixgbe_tx_buffer {
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@ -150,6 +154,8 @@ struct ixgbe_ring {
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/* cpu for tx queue */
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int cpu;
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#endif
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struct net_lro_mgr lro_mgr;
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bool lro_used;
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struct ixgbe_queue_stats stats;
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u8 v_idx; /* maps directly to the index for this ring in the hardware
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* vector array, can also be used for finding the bit in EICR
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@ -287,6 +293,9 @@ struct ixgbe_adapter {
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unsigned long state;
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u64 tx_busy;
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u64 lro_aggregated;
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u64 lro_flushed;
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u64 lro_no_desc;
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};
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enum ixbge_state_t {
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@ -90,6 +90,8 @@ static struct ixgbe_stats ixgbe_gstrings_stats[] = {
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{"rx_header_split", IXGBE_STAT(rx_hdr_split)},
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{"alloc_rx_page_failed", IXGBE_STAT(alloc_rx_page_failed)},
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{"alloc_rx_buff_failed", IXGBE_STAT(alloc_rx_buff_failed)},
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{"lro_aggregated", IXGBE_STAT(lro_aggregated)},
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{"lro_flushed", IXGBE_STAT(lro_flushed)},
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};
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#define IXGBE_QUEUE_STATS_LEN \
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@ -787,6 +789,7 @@ static void ixgbe_get_ethtool_stats(struct net_device *netdev,
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int stat_count = sizeof(struct ixgbe_queue_stats) / sizeof(u64);
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int j, k;
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int i;
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u64 aggregated = 0, flushed = 0, no_desc = 0;
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ixgbe_update_stats(adapter);
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for (i = 0; i < IXGBE_GLOBAL_STATS_LEN; i++) {
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@ -801,11 +804,17 @@ static void ixgbe_get_ethtool_stats(struct net_device *netdev,
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i += k;
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}
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for (j = 0; j < adapter->num_rx_queues; j++) {
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aggregated += adapter->rx_ring[j].lro_mgr.stats.aggregated;
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flushed += adapter->rx_ring[j].lro_mgr.stats.flushed;
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no_desc += adapter->rx_ring[j].lro_mgr.stats.no_desc;
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queue_stat = (u64 *)&adapter->rx_ring[j].stats;
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for (k = 0; k < stat_count; k++)
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data[i + k] = queue_stat[k];
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i += k;
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}
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adapter->lro_aggregated = aggregated;
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adapter->lro_flushed = flushed;
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adapter->lro_no_desc = no_desc;
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}
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static void ixgbe_get_strings(struct net_device *netdev, u32 stringset,
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@ -973,6 +982,8 @@ static struct ethtool_ops ixgbe_ethtool_ops = {
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.get_ethtool_stats = ixgbe_get_ethtool_stats,
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.get_coalesce = ixgbe_get_coalesce,
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.set_coalesce = ixgbe_set_coalesce,
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.get_flags = ethtool_op_get_flags,
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.set_flags = ethtool_op_set_flags,
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};
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void ixgbe_set_ethtool_ops(struct net_device *netdev)
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@ -389,24 +389,39 @@ static int __ixgbe_notify_dca(struct device *dev, void *data)
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* ixgbe_receive_skb - Send a completed packet up the stack
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* @adapter: board private structure
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* @skb: packet to send up
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* @is_vlan: packet has a VLAN tag
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* @tag: VLAN tag from descriptor
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* @status: hardware indication of status of receive
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* @rx_ring: rx descriptor ring (for a specific queue) to setup
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* @rx_desc: rx descriptor
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**/
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static void ixgbe_receive_skb(struct ixgbe_adapter *adapter,
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struct sk_buff *skb, bool is_vlan,
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u16 tag)
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struct sk_buff *skb, u8 status,
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struct ixgbe_ring *ring,
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union ixgbe_adv_rx_desc *rx_desc)
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{
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if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
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if (adapter->vlgrp && is_vlan)
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vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag);
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else
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netif_receive_skb(skb);
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} else {
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bool is_vlan = (status & IXGBE_RXD_STAT_VP);
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u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
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if (adapter->netdev->features & NETIF_F_LRO &&
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skb->ip_summed == CHECKSUM_UNNECESSARY) {
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if (adapter->vlgrp && is_vlan)
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vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
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lro_vlan_hwaccel_receive_skb(&ring->lro_mgr, skb,
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adapter->vlgrp, tag,
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rx_desc);
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else
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netif_rx(skb);
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lro_receive_skb(&ring->lro_mgr, skb, rx_desc);
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ring->lro_used = true;
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} else {
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if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
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if (adapter->vlgrp && is_vlan)
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vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag);
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else
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netif_receive_skb(skb);
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} else {
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if (adapter->vlgrp && is_vlan)
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vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
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else
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netif_rx(skb);
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}
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}
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}
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@ -546,8 +561,8 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
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struct sk_buff *skb;
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unsigned int i;
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u32 upper_len, len, staterr;
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u16 hdr_info, vlan_tag;
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bool is_vlan, cleaned = false;
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u16 hdr_info;
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bool cleaned = false;
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int cleaned_count = 0;
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unsigned int total_rx_bytes = 0, total_rx_packets = 0;
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@ -556,8 +571,6 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
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rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
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staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
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rx_buffer_info = &rx_ring->rx_buffer_info[i];
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is_vlan = (staterr & IXGBE_RXD_STAT_VP);
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vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
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while (staterr & IXGBE_RXD_STAT_DD) {
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if (*work_done >= work_to_do)
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@ -635,7 +648,7 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
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total_rx_packets++;
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skb->protocol = eth_type_trans(skb, netdev);
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ixgbe_receive_skb(adapter, skb, is_vlan, vlan_tag);
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ixgbe_receive_skb(adapter, skb, staterr, rx_ring, rx_desc);
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netdev->last_rx = jiffies;
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next_desc:
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@ -652,8 +665,11 @@ next_desc:
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rx_buffer_info = next_buffer;
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staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
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is_vlan = (staterr & IXGBE_RXD_STAT_VP);
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vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
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}
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if (rx_ring->lro_used) {
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lro_flush_all(&rx_ring->lro_mgr);
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rx_ring->lro_used = false;
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}
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rx_ring->next_to_clean = i;
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@ -1381,6 +1397,33 @@ static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
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(((S) & (PAGE_SIZE - 1)) ? 1 : 0))
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#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
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/**
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* ixgbe_get_skb_hdr - helper function for LRO header processing
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* @skb: pointer to sk_buff to be added to LRO packet
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* @iphdr: pointer to tcp header structure
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* @tcph: pointer to tcp header structure
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* @hdr_flags: pointer to header flags
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* @priv: private data
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**/
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static int ixgbe_get_skb_hdr(struct sk_buff *skb, void **iphdr, void **tcph,
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u64 *hdr_flags, void *priv)
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{
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union ixgbe_adv_rx_desc *rx_desc = priv;
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/* Verify that this is a valid IPv4 TCP packet */
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if (!(rx_desc->wb.lower.lo_dword.pkt_info &
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(IXGBE_RXDADV_PKTTYPE_IPV4 | IXGBE_RXDADV_PKTTYPE_TCP)))
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return -1;
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/* Set network headers */
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skb_reset_network_header(skb);
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skb_set_transport_header(skb, ip_hdrlen(skb));
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*iphdr = ip_hdr(skb);
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*tcph = tcp_hdr(skb);
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*hdr_flags = LRO_IPV4 | LRO_TCP;
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return 0;
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}
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/**
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* ixgbe_configure_rx - Configure 8254x Receive Unit after Reset
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* @adapter: board private structure
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@ -1470,6 +1513,17 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
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adapter->rx_ring[i].tail = IXGBE_RDT(i);
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}
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/* Intitial LRO Settings */
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adapter->rx_ring[i].lro_mgr.max_aggr = IXGBE_MAX_LRO_AGGREGATE;
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adapter->rx_ring[i].lro_mgr.max_desc = IXGBE_MAX_LRO_DESCRIPTORS;
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adapter->rx_ring[i].lro_mgr.get_skb_header = ixgbe_get_skb_hdr;
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adapter->rx_ring[i].lro_mgr.features = LRO_F_EXTRACT_VLAN_ID;
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if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
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adapter->rx_ring[i].lro_mgr.features |= LRO_F_NAPI;
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adapter->rx_ring[i].lro_mgr.dev = adapter->netdev;
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adapter->rx_ring[i].lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
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adapter->rx_ring[i].lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
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if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
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/* Fill out redirection table */
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for (i = 0, j = 0; i < 128; i++, j++) {
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@ -2489,12 +2543,18 @@ int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
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struct pci_dev *pdev = adapter->pdev;
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int size;
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size = sizeof(struct net_lro_desc) * IXGBE_MAX_LRO_DESCRIPTORS;
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rxdr->lro_mgr.lro_arr = vmalloc(size);
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if (!rxdr->lro_mgr.lro_arr)
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return -ENOMEM;
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memset(rxdr->lro_mgr.lro_arr, 0, size);
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size = sizeof(struct ixgbe_rx_buffer) * rxdr->count;
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rxdr->rx_buffer_info = vmalloc(size);
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if (!rxdr->rx_buffer_info) {
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DPRINTK(PROBE, ERR,
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"vmalloc allocation failed for the rx desc ring\n");
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return -ENOMEM;
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goto alloc_failed;
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}
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memset(rxdr->rx_buffer_info, 0, size);
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@ -2508,13 +2568,18 @@ int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
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DPRINTK(PROBE, ERR,
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"Memory allocation failed for the rx desc ring\n");
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vfree(rxdr->rx_buffer_info);
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return -ENOMEM;
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goto alloc_failed;
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}
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rxdr->next_to_clean = 0;
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rxdr->next_to_use = 0;
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return 0;
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alloc_failed:
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vfree(rxdr->lro_mgr.lro_arr);
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rxdr->lro_mgr.lro_arr = NULL;
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return -ENOMEM;
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}
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/**
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@ -2565,6 +2630,9 @@ static void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
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{
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struct pci_dev *pdev = adapter->pdev;
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vfree(rx_ring->lro_mgr.lro_arr);
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rx_ring->lro_mgr.lro_arr = NULL;
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ixgbe_clean_rx_ring(adapter, rx_ring);
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vfree(rx_ring->rx_buffer_info);
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@ -3517,6 +3585,7 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
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NETIF_F_HW_VLAN_RX |
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NETIF_F_HW_VLAN_FILTER;
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netdev->features |= NETIF_F_LRO;
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netdev->features |= NETIF_F_TSO;
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netdev->features |= NETIF_F_TSO6;
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