From 19e364f6801e38972673278adedaab1abf6f854c Mon Sep 17 00:00:00 2001 From: Or Gerlitz Date: Mon, 10 Jan 2011 17:41:54 -0800 Subject: [PATCH] IPoIB: Remove LRO support As a first step in moving from LRO to GRO, revert commit af40da894e9 ("IPoIB: add LRO support"). Also eliminate the ethtool set_flags callback which isn't needed anymore. Finally, we need to include directly to get the declaration of restart_syscall() (which used to be included implicitly through ). Cc: Ben Hutchings Cc: Eric W. Biederman Cc: Vladimir Sokolovsky Signed-off-by: Or Gerlitz Signed-off-by: Roland Dreier --- drivers/infiniband/ulp/ipoib/Kconfig | 1 - drivers/infiniband/ulp/ipoib/ipoib.h | 12 +--- drivers/infiniband/ulp/ipoib/ipoib_ethtool.c | 51 ---------------- drivers/infiniband/ulp/ipoib/ipoib_ib.c | 8 +-- drivers/infiniband/ulp/ipoib/ipoib_main.c | 62 -------------------- 5 files changed, 2 insertions(+), 132 deletions(-) diff --git a/drivers/infiniband/ulp/ipoib/Kconfig b/drivers/infiniband/ulp/ipoib/Kconfig index 9d9a9dc51f18..55855eeabae7 100644 --- a/drivers/infiniband/ulp/ipoib/Kconfig +++ b/drivers/infiniband/ulp/ipoib/Kconfig @@ -1,7 +1,6 @@ config INFINIBAND_IPOIB tristate "IP-over-InfiniBand" depends on NETDEVICES && INET && (IPV6 || IPV6=n) - select INET_LRO ---help--- Support for the IP-over-InfiniBand protocol (IPoIB). This transports IP packets over InfiniBand so you can use your IB diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h index 753a983a5fdc..ab97f92fc257 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib.h +++ b/drivers/infiniband/ulp/ipoib/ipoib.h @@ -50,7 +50,7 @@ #include #include #include -#include +#include /* constants */ @@ -100,9 +100,6 @@ enum { IPOIB_MCAST_FLAG_BUSY = 2, /* joining or already joined */ IPOIB_MCAST_FLAG_ATTACHED = 3, - IPOIB_MAX_LRO_DESCRIPTORS = 8, - IPOIB_LRO_MAX_AGGR = 64, - MAX_SEND_CQE = 16, IPOIB_CM_COPYBREAK = 256, }; @@ -262,11 +259,6 @@ struct ipoib_ethtool_st { u16 max_coalesced_frames; }; -struct ipoib_lro { - struct net_lro_mgr lro_mgr; - struct net_lro_desc lro_desc[IPOIB_MAX_LRO_DESCRIPTORS]; -}; - /* * Device private locking: network stack tx_lock protects members used * in TX fast path, lock protects everything else. lock nests inside @@ -352,8 +344,6 @@ struct ipoib_dev_priv { int hca_caps; struct ipoib_ethtool_st ethtool; struct timer_list poll_timer; - - struct ipoib_lro lro; }; struct ipoib_ah { diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c b/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c index 1a1657c82edd..19f7f5206f78 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c @@ -106,63 +106,12 @@ static int ipoib_set_coalesce(struct net_device *dev, return 0; } -static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = { - "LRO aggregated", "LRO flushed", - "LRO avg aggr", "LRO no desc" -}; - -static void ipoib_get_strings(struct net_device *netdev, u32 stringset, u8 *data) -{ - switch (stringset) { - case ETH_SS_STATS: - memcpy(data, *ipoib_stats_keys, sizeof(ipoib_stats_keys)); - break; - } -} - -static int ipoib_get_sset_count(struct net_device *dev, int sset) -{ - switch (sset) { - case ETH_SS_STATS: - return ARRAY_SIZE(ipoib_stats_keys); - default: - return -EOPNOTSUPP; - } -} - -static void ipoib_get_ethtool_stats(struct net_device *dev, - struct ethtool_stats *stats, uint64_t *data) -{ - struct ipoib_dev_priv *priv = netdev_priv(dev); - int index = 0; - - /* Get LRO statistics */ - data[index++] = priv->lro.lro_mgr.stats.aggregated; - data[index++] = priv->lro.lro_mgr.stats.flushed; - if (priv->lro.lro_mgr.stats.flushed) - data[index++] = priv->lro.lro_mgr.stats.aggregated / - priv->lro.lro_mgr.stats.flushed; - else - data[index++] = 0; - data[index++] = priv->lro.lro_mgr.stats.no_desc; -} - -static int ipoib_set_flags(struct net_device *dev, u32 flags) -{ - return ethtool_op_set_flags(dev, flags, ETH_FLAG_LRO); -} - static const struct ethtool_ops ipoib_ethtool_ops = { .get_drvinfo = ipoib_get_drvinfo, .get_rx_csum = ipoib_get_rx_csum, .set_tso = ipoib_set_tso, .get_coalesce = ipoib_get_coalesce, .set_coalesce = ipoib_set_coalesce, - .get_flags = ethtool_op_get_flags, - .set_flags = ipoib_set_flags, - .get_strings = ipoib_get_strings, - .get_sset_count = ipoib_get_sset_count, - .get_ethtool_stats = ipoib_get_ethtool_stats, }; void ipoib_set_ethtool_ops(struct net_device *dev) diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c index dfa71903d6e4..44c33bd97952 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c @@ -295,10 +295,7 @@ static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok)) skb->ip_summed = CHECKSUM_UNNECESSARY; - if (dev->features & NETIF_F_LRO) - lro_receive_skb(&priv->lro.lro_mgr, skb, NULL); - else - netif_receive_skb(skb); + netif_receive_skb(skb); repost: if (unlikely(ipoib_ib_post_receive(dev, wr_id))) @@ -450,9 +447,6 @@ poll_more: } if (done < budget) { - if (dev->features & NETIF_F_LRO) - lro_flush_all(&priv->lro.lro_mgr); - napi_complete(napi); if (unlikely(ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP | diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index 9ff7bc73ed95..c434a856a787 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -60,15 +60,6 @@ MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); -static int lro; -module_param(lro, bool, 0444); -MODULE_PARM_DESC(lro, "Enable LRO (Large Receive Offload)"); - -static int lro_max_aggr = IPOIB_LRO_MAX_AGGR; -module_param(lro_max_aggr, int, 0644); -MODULE_PARM_DESC(lro_max_aggr, "LRO: Max packets to be aggregated " - "(default = 64)"); - #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG int ipoib_debug_level; @@ -976,54 +967,6 @@ static const struct header_ops ipoib_header_ops = { .create = ipoib_hard_header, }; -static int get_skb_hdr(struct sk_buff *skb, void **iphdr, - void **tcph, u64 *hdr_flags, void *priv) -{ - unsigned int ip_len; - struct iphdr *iph; - - if (unlikely(skb->protocol != htons(ETH_P_IP))) - return -1; - - /* - * In the future we may add an else clause that verifies the - * checksum and allows devices which do not calculate checksum - * to use LRO. - */ - if (unlikely(skb->ip_summed != CHECKSUM_UNNECESSARY)) - return -1; - - /* Check for non-TCP packet */ - skb_reset_network_header(skb); - iph = ip_hdr(skb); - if (iph->protocol != IPPROTO_TCP) - return -1; - - ip_len = ip_hdrlen(skb); - skb_set_transport_header(skb, ip_len); - *tcph = tcp_hdr(skb); - - /* check if IP header and TCP header are complete */ - if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb)) - return -1; - - *hdr_flags = LRO_IPV4 | LRO_TCP; - *iphdr = iph; - - return 0; -} - -static void ipoib_lro_setup(struct ipoib_dev_priv *priv) -{ - priv->lro.lro_mgr.max_aggr = lro_max_aggr; - priv->lro.lro_mgr.max_desc = IPOIB_MAX_LRO_DESCRIPTORS; - priv->lro.lro_mgr.lro_arr = priv->lro.lro_desc; - priv->lro.lro_mgr.get_skb_header = get_skb_hdr; - priv->lro.lro_mgr.features = LRO_F_NAPI; - priv->lro.lro_mgr.dev = priv->dev; - priv->lro.lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; -} - static const struct net_device_ops ipoib_netdev_ops = { .ndo_open = ipoib_open, .ndo_stop = ipoib_stop, @@ -1067,8 +1010,6 @@ static void ipoib_setup(struct net_device *dev) priv->dev = dev; - ipoib_lro_setup(priv); - spin_lock_init(&priv->lock); mutex_init(&priv->vlan_mutex); @@ -1218,9 +1159,6 @@ int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) priv->dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM; } - if (lro) - priv->dev->features |= NETIF_F_LRO; - if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO) priv->dev->features |= NETIF_F_TSO;