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RDMA/nes: Use LRO
Signed-off-by: Faisal Latif <flatif@neteffect.com. Signed-off-by: Glenn Streiff <gstreiff@neteffect.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
parent
b4132efa1a
commit
37dab4112d
6 changed files with 69 additions and 11 deletions
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@ -2,6 +2,7 @@ config INFINIBAND_NES
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tristate "NetEffect RNIC Driver"
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depends on PCI && INET && INFINIBAND
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select LIBCRC32C
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select INET_LRO
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---help---
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This is a low-level driver for NetEffect RDMA enabled
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Network Interface Cards (RNIC).
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@ -91,6 +91,10 @@ unsigned int nes_debug_level = 0;
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module_param_named(debug_level, nes_debug_level, uint, 0644);
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MODULE_PARM_DESC(debug_level, "Enable debug output level");
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unsigned int nes_lro_max_aggr = NES_LRO_MAX_AGGR;
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module_param(nes_lro_max_aggr, int, NES_LRO_MAX_AGGR);
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MODULE_PARM_DESC(nes_mro_max_aggr, " nic LRO MAX packet aggregation");
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LIST_HEAD(nes_adapter_list);
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static LIST_HEAD(nes_dev_list);
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@ -173,6 +173,7 @@ extern int disable_mpa_crc;
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extern unsigned int send_first;
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extern unsigned int nes_drv_opt;
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extern unsigned int nes_debug_level;
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extern unsigned int nes_lro_max_aggr;
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extern struct list_head nes_adapter_list;
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@ -38,6 +38,7 @@
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#include <linux/ip.h>
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#include <linux/tcp.h>
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#include <linux/if_vlan.h>
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#include <linux/inet_lro.h>
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#include "nes.h"
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@ -1375,6 +1376,25 @@ static void nes_rq_wqes_timeout(unsigned long parm)
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}
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static int nes_lro_get_skb_hdr(struct sk_buff *skb, void **iphdr,
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void **tcph, u64 *hdr_flags, void *priv)
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{
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unsigned int ip_len;
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struct iphdr *iph;
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skb_reset_network_header(skb);
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iph = ip_hdr(skb);
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if (iph->protocol != IPPROTO_TCP)
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return -1;
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ip_len = ip_hdrlen(skb);
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skb_set_transport_header(skb, ip_len);
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*tcph = tcp_hdr(skb);
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*hdr_flags = LRO_IPV4 | LRO_TCP;
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*iphdr = iph;
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return 0;
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}
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/**
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* nes_init_nic_qp
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*/
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@ -1592,15 +1612,21 @@ int nes_init_nic_qp(struct nes_device *nesdev, struct net_device *netdev)
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nesvnic->rq_wqes_timer.function = nes_rq_wqes_timeout;
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nesvnic->rq_wqes_timer.data = (unsigned long)nesvnic;
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nes_debug(NES_DBG_INIT, "NAPI support Enabled\n");
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if (nesdev->nesadapter->et_use_adaptive_rx_coalesce)
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{
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nes_nic_init_timer(nesdev);
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if (netdev->mtu > 1500)
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jumbomode = 1;
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nes_nic_init_timer_defaults(nesdev, jumbomode);
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nes_nic_init_timer_defaults(nesdev, jumbomode);
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}
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nesvnic->lro_mgr.max_aggr = NES_LRO_MAX_AGGR;
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nesvnic->lro_mgr.max_desc = NES_MAX_LRO_DESCRIPTORS;
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nesvnic->lro_mgr.lro_arr = nesvnic->lro_desc;
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nesvnic->lro_mgr.get_skb_header = nes_lro_get_skb_hdr;
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nesvnic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
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nesvnic->lro_mgr.dev = netdev;
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nesvnic->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
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nesvnic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
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return 0;
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}
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@ -2254,10 +2280,13 @@ void nes_nic_ce_handler(struct nes_device *nesdev, struct nes_hw_nic_cq *cq)
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u16 pkt_type;
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u16 rqes_processed = 0;
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u8 sq_cqes = 0;
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u8 nes_use_lro = 0;
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head = cq->cq_head;
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cq_size = cq->cq_size;
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cq->cqes_pending = 1;
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if (nesvnic->netdev->features & NETIF_F_LRO)
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nes_use_lro = 1;
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do {
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if (le32_to_cpu(cq->cq_vbase[head].cqe_words[NES_NIC_CQE_MISC_IDX]) &
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NES_NIC_CQE_VALID) {
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@ -2379,9 +2408,16 @@ void nes_nic_ce_handler(struct nes_device *nesdev, struct nes_hw_nic_cq *cq)
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>> 16);
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nes_debug(NES_DBG_CQ, "%s: Reporting stripped VLAN packet. Tag = 0x%04X\n",
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nesvnic->netdev->name, vlan_tag);
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nes_vlan_rx(rx_skb, nesvnic->vlan_grp, vlan_tag);
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if (nes_use_lro)
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lro_vlan_hwaccel_receive_skb(&nesvnic->lro_mgr, rx_skb,
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nesvnic->vlan_grp, vlan_tag, NULL);
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else
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nes_vlan_rx(rx_skb, nesvnic->vlan_grp, vlan_tag);
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} else {
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nes_netif_rx(rx_skb);
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if (nes_use_lro)
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lro_receive_skb(&nesvnic->lro_mgr, rx_skb, NULL);
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else
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nes_netif_rx(rx_skb);
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}
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}
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@ -2413,13 +2449,14 @@ void nes_nic_ce_handler(struct nes_device *nesdev, struct nes_hw_nic_cq *cq)
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} while (1);
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if (nes_use_lro)
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lro_flush_all(&nesvnic->lro_mgr);
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if (sq_cqes) {
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barrier();
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/* restart the queue if it had been stopped */
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if (netif_queue_stopped(nesvnic->netdev))
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netif_wake_queue(nesvnic->netdev);
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}
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cq->cq_head = head;
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/* nes_debug(NES_DBG_CQ, "CQ%u Processed = %u cqes, new head = %u.\n",
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cq->cq_number, cqe_count, cq->cq_head); */
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@ -2432,7 +2469,7 @@ void nes_nic_ce_handler(struct nes_device *nesdev, struct nes_hw_nic_cq *cq)
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}
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if (atomic_read(&nesvnic->rx_skbs_needed))
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nes_replenish_nic_rq(nesvnic);
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}
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}
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/**
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@ -33,6 +33,8 @@
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#ifndef __NES_HW_H
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#define __NES_HW_H
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#include <linux/inet_lro.h>
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#define NES_PHY_TYPE_1G 2
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#define NES_PHY_TYPE_IRIS 3
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#define NES_PHY_TYPE_PUMA_10G 6
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@ -982,8 +984,10 @@ struct nes_hw_tune_timer {
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#define NES_TIMER_INT_LIMIT 2
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#define NES_TIMER_INT_LIMIT_DYNAMIC 10
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#define NES_TIMER_ENABLE_LIMIT 4
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#define NES_MAX_LINK_INTERRUPTS 128
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#define NES_MAX_LINK_CHECK 200
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#define NES_MAX_LINK_INTERRUPTS 128
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#define NES_MAX_LINK_CHECK 200
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#define NES_MAX_LRO_DESCRIPTORS 32
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#define NES_LRO_MAX_AGGR 64
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struct nes_adapter {
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u64 fw_ver;
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@ -1183,6 +1187,9 @@ struct nes_vnic {
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u8 of_device_registered;
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u8 rdma_enabled;
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u8 rx_checksum_disabled;
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u32 lro_max_aggr;
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struct net_lro_mgr lro_mgr;
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struct net_lro_desc lro_desc[NES_MAX_LRO_DESCRIPTORS];
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};
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struct nes_ib_device {
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@ -936,8 +936,7 @@ static int nes_netdev_change_mtu(struct net_device *netdev, int new_mtu)
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return ret;
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}
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#define NES_ETHTOOL_STAT_COUNT 55
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static const char nes_ethtool_stringset[NES_ETHTOOL_STAT_COUNT][ETH_GSTRING_LEN] = {
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static const char nes_ethtool_stringset[][ETH_GSTRING_LEN] = {
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"Link Change Interrupts",
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"Linearized SKBs",
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"T/GSO Requests",
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@ -993,8 +992,12 @@ static const char nes_ethtool_stringset[NES_ETHTOOL_STAT_COUNT][ETH_GSTRING_LEN]
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"CQ Depth 32",
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"CQ Depth 128",
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"CQ Depth 256",
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"LRO aggregated",
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"LRO flushed",
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"LRO no_desc",
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};
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#define NES_ETHTOOL_STAT_COUNT ARRAY_SIZE(nes_ethtool_stringset)
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/**
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* nes_netdev_get_rx_csum
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@ -1189,6 +1192,9 @@ static void nes_netdev_get_ethtool_stats(struct net_device *netdev,
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target_stat_values[52] = int_mod_cq_depth_32;
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target_stat_values[53] = int_mod_cq_depth_128;
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target_stat_values[54] = int_mod_cq_depth_256;
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target_stat_values[55] = nesvnic->lro_mgr.stats.aggregated;
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target_stat_values[56] = nesvnic->lro_mgr.stats.flushed;
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target_stat_values[57] = nesvnic->lro_mgr.stats.no_desc;
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}
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@ -1454,6 +1460,8 @@ static struct ethtool_ops nes_ethtool_ops = {
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.set_sg = ethtool_op_set_sg,
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.get_tso = ethtool_op_get_tso,
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.set_tso = ethtool_op_set_tso,
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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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