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[EHEA]: Use LRO.
Signed-off-by: Jan-Bernd Themann <themann@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan-Bernd Themann
David S. Miller
parent
71c87e0ced
commit
d4dc4ec9d8
@ -2507,6 +2507,7 @@ config CHELSIO_T3
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config EHEA
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tristate "eHEA Ethernet support"
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depends on IBMEBUS
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select INET_LRO
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---help---
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This driver supports the IBM pSeries eHEA ethernet adapter.
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@ -33,6 +33,7 @@
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#include <linux/ethtool.h>
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#include <linux/vmalloc.h>
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#include <linux/if_vlan.h>
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#include <linux/inet_lro.h>
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#include <asm/ibmebus.h>
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#include <asm/abs_addr.h>
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@ -58,6 +59,7 @@
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#define EHEA_SMALL_QUEUES
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#define EHEA_NUM_TX_QP 1
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#define EHEA_LRO_MAX_AGGR 64
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#ifdef EHEA_SMALL_QUEUES
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#define EHEA_MAX_CQE_COUNT 1023
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@ -84,6 +86,8 @@
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#define EHEA_RQ2_PKT_SIZE 1522
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#define EHEA_L_PKT_SIZE 256 /* low latency */
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#define MAX_LRO_DESCRIPTORS 8
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/* Send completion signaling */
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/* Protection Domain Identifier */
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@ -376,6 +380,8 @@ struct ehea_port_res {
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u64 tx_packets;
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u64 rx_packets;
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u32 poll_counter;
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struct net_lro_mgr lro_mgr;
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struct net_lro_desc lro_desc[MAX_LRO_DESCRIPTORS];
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};
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@ -429,6 +435,7 @@ struct ehea_port {
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u32 msg_enable;
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u32 sig_comp_iv;
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u32 state;
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u32 lro_max_aggr;
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u8 phy_link;
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u8 full_duplex;
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u8 autoneg;
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@ -183,6 +183,9 @@ static char ehea_ethtool_stats_keys[][ETH_GSTRING_LEN] = {
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{"PR5 free_swqes"},
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{"PR6 free_swqes"},
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{"PR7 free_swqes"},
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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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static void ehea_get_strings(struct net_device *dev, u32 stringset, u8 *data)
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@ -239,6 +242,18 @@ static void ehea_get_ethtool_stats(struct net_device *dev,
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for (k = 0; k < 8; k++)
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data[i++] = atomic_read(&port->port_res[k].swqe_avail);
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for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
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tmp |= port->port_res[k].lro_mgr.stats.aggregated;
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data[i++] = tmp;
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for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
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tmp |= port->port_res[k].lro_mgr.stats.flushed;
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data[i++] = tmp;
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for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
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tmp |= port->port_res[k].lro_mgr.stats.no_desc;
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data[i++] = tmp;
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}
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const struct ethtool_ops ehea_ethtool_ops = {
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@ -52,6 +52,8 @@ static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
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static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
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static int sq_entries = EHEA_DEF_ENTRIES_SQ;
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static int use_mcs = 0;
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static int use_lro = 0;
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static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
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static int num_tx_qps = EHEA_NUM_TX_QP;
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static int prop_carrier_state = 0;
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@ -62,6 +64,8 @@ module_param(rq3_entries, int, 0);
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module_param(sq_entries, int, 0);
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module_param(prop_carrier_state, int, 0);
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module_param(use_mcs, int, 0);
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module_param(use_lro, int, 0);
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module_param(lro_max_aggr, int, 0);
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module_param(num_tx_qps, int, 0);
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MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
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@ -82,6 +86,11 @@ MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
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__MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
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MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
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MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
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__MODULE_STRING(EHEA_LRO_MAX_AGGR));
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MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
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"Default = 0");
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static int port_name_cnt = 0;
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static LIST_HEAD(adapter_list);
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u64 ehea_driver_flags = 0;
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@ -393,6 +402,60 @@ static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
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return 0;
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}
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static int 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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struct ehea_cqe *cqe = priv;
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unsigned int ip_len;
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struct iphdr *iph;
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/* non tcp/udp packets */
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if (!cqe->header_length)
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return -1;
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/* non tcp packet */
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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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/* check if ip header and tcp header are complete */
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if (iph->tot_len < ip_len + tcp_hdrlen(skb))
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return -1;
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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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static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
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struct sk_buff *skb)
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{
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int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
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&& pr->port->vgrp;
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if (use_lro) {
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if (vlan_extracted)
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lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
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pr->port->vgrp,
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cqe->vlan_tag,
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cqe);
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else
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lro_receive_skb(&pr->lro_mgr, skb, cqe);
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} else {
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if (vlan_extracted)
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vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
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cqe->vlan_tag);
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else
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netif_receive_skb(skb);
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}
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}
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static int ehea_proc_rwqes(struct net_device *dev,
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struct ehea_port_res *pr,
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int budget)
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@ -462,13 +525,7 @@ static int ehea_proc_rwqes(struct net_device *dev,
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processed_rq3++;
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}
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if ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
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&& port->vgrp)
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vlan_hwaccel_receive_skb(skb, port->vgrp,
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cqe->vlan_tag);
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else
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netif_receive_skb(skb);
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ehea_proc_skb(pr, cqe, skb);
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dev->last_rx = jiffies;
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} else {
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pr->p_stats.poll_receive_errors++;
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@ -480,6 +537,8 @@ static int ehea_proc_rwqes(struct net_device *dev,
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}
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cqe = ehea_poll_rq1(qp, &wqe_index);
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}
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if (use_lro)
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lro_flush_all(&pr->lro_mgr);
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pr->rx_packets += processed;
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@ -1231,6 +1290,15 @@ static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
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netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
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pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
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pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
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pr->lro_mgr.lro_arr = pr->lro_desc;
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pr->lro_mgr.get_skb_header = get_skb_hdr;
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pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
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pr->lro_mgr.dev = port->netdev;
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pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
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pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
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ret = 0;
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goto out;
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@ -2682,6 +2750,8 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
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goto out_dereg_bc;
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}
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port->lro_max_aggr = lro_max_aggr;
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ret = ehea_get_jumboframe_status(port, &jumbo);
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if (ret)
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ehea_error("failed determining jumbo frame status for %s",
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