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authorJan-Bernd Themann <themann@de.ibm.com>2007-09-25 19:16:34 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 19:47:47 -0400
commitd4dc4ec9d84e0578b9bfbe56a11fafdb7cbac771 (patch)
tree03813a60023b75752ebcb8b3217018d472b21c86 /drivers/net
parent71c87e0cedca843162206c698cfa02e5fea9e2e3 (diff)
[EHEA]: Use LRO.
Signed-off-by: Jan-Bernd Themann <themann@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/Kconfig1
-rw-r--r--drivers/net/ehea/ehea.h7
-rw-r--r--drivers/net/ehea/ehea_ethtool.c15
-rw-r--r--drivers/net/ehea/ehea_main.c84
4 files changed, 100 insertions, 7 deletions
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index e0a979184c0a..61dedfeed62a 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2507,6 +2507,7 @@ config CHELSIO_T3
2507config EHEA 2507config EHEA
2508 tristate "eHEA Ethernet support" 2508 tristate "eHEA Ethernet support"
2509 depends on IBMEBUS 2509 depends on IBMEBUS
2510 select INET_LRO
2510 ---help--- 2511 ---help---
2511 This driver supports the IBM pSeries eHEA ethernet adapter. 2512 This driver supports the IBM pSeries eHEA ethernet adapter.
2512 2513
diff --git a/drivers/net/ehea/ehea.h b/drivers/net/ehea/ehea.h
index a154681165b9..c0cbd949e336 100644
--- a/drivers/net/ehea/ehea.h
+++ b/drivers/net/ehea/ehea.h
@@ -33,6 +33,7 @@
33#include <linux/ethtool.h> 33#include <linux/ethtool.h>
34#include <linux/vmalloc.h> 34#include <linux/vmalloc.h>
35#include <linux/if_vlan.h> 35#include <linux/if_vlan.h>
36#include <linux/inet_lro.h>
36 37
37#include <asm/ibmebus.h> 38#include <asm/ibmebus.h>
38#include <asm/abs_addr.h> 39#include <asm/abs_addr.h>
@@ -58,6 +59,7 @@
58 59
59#define EHEA_SMALL_QUEUES 60#define EHEA_SMALL_QUEUES
60#define EHEA_NUM_TX_QP 1 61#define EHEA_NUM_TX_QP 1
62#define EHEA_LRO_MAX_AGGR 64
61 63
62#ifdef EHEA_SMALL_QUEUES 64#ifdef EHEA_SMALL_QUEUES
63#define EHEA_MAX_CQE_COUNT 1023 65#define EHEA_MAX_CQE_COUNT 1023
@@ -84,6 +86,8 @@
84#define EHEA_RQ2_PKT_SIZE 1522 86#define EHEA_RQ2_PKT_SIZE 1522
85#define EHEA_L_PKT_SIZE 256 /* low latency */ 87#define EHEA_L_PKT_SIZE 256 /* low latency */
86 88
89#define MAX_LRO_DESCRIPTORS 8
90
87/* Send completion signaling */ 91/* Send completion signaling */
88 92
89/* Protection Domain Identifier */ 93/* Protection Domain Identifier */
@@ -376,6 +380,8 @@ struct ehea_port_res {
376 u64 tx_packets; 380 u64 tx_packets;
377 u64 rx_packets; 381 u64 rx_packets;
378 u32 poll_counter; 382 u32 poll_counter;
383 struct net_lro_mgr lro_mgr;
384 struct net_lro_desc lro_desc[MAX_LRO_DESCRIPTORS];
379}; 385};
380 386
381 387
@@ -429,6 +435,7 @@ struct ehea_port {
429 u32 msg_enable; 435 u32 msg_enable;
430 u32 sig_comp_iv; 436 u32 sig_comp_iv;
431 u32 state; 437 u32 state;
438 u32 lro_max_aggr;
432 u8 phy_link; 439 u8 phy_link;
433 u8 full_duplex; 440 u8 full_duplex;
434 u8 autoneg; 441 u8 autoneg;
diff --git a/drivers/net/ehea/ehea_ethtool.c b/drivers/net/ehea/ehea_ethtool.c
index decec8cfe96b..29ef7a98f8be 100644
--- a/drivers/net/ehea/ehea_ethtool.c
+++ b/drivers/net/ehea/ehea_ethtool.c
@@ -183,6 +183,9 @@ static char ehea_ethtool_stats_keys[][ETH_GSTRING_LEN] = {
183 {"PR5 free_swqes"}, 183 {"PR5 free_swqes"},
184 {"PR6 free_swqes"}, 184 {"PR6 free_swqes"},
185 {"PR7 free_swqes"}, 185 {"PR7 free_swqes"},
186 {"LRO aggregated"},
187 {"LRO flushed"},
188 {"LRO no_desc"},
186}; 189};
187 190
188static void ehea_get_strings(struct net_device *dev, u32 stringset, u8 *data) 191static void ehea_get_strings(struct net_device *dev, u32 stringset, u8 *data)
@@ -239,6 +242,18 @@ static void ehea_get_ethtool_stats(struct net_device *dev,
239 for (k = 0; k < 8; k++) 242 for (k = 0; k < 8; k++)
240 data[i++] = atomic_read(&port->port_res[k].swqe_avail); 243 data[i++] = atomic_read(&port->port_res[k].swqe_avail);
241 244
245 for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
246 tmp |= port->port_res[k].lro_mgr.stats.aggregated;
247 data[i++] = tmp;
248
249 for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
250 tmp |= port->port_res[k].lro_mgr.stats.flushed;
251 data[i++] = tmp;
252
253 for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
254 tmp |= port->port_res[k].lro_mgr.stats.no_desc;
255 data[i++] = tmp;
256
242} 257}
243 258
244const struct ethtool_ops ehea_ethtool_ops = { 259const struct ethtool_ops ehea_ethtool_ops = {
diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index 5ebd545ab04e..b8e00391a5e3 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -52,6 +52,8 @@ static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
52static int rq3_entries = EHEA_DEF_ENTRIES_RQ3; 52static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
53static int sq_entries = EHEA_DEF_ENTRIES_SQ; 53static int sq_entries = EHEA_DEF_ENTRIES_SQ;
54static int use_mcs = 0; 54static int use_mcs = 0;
55static int use_lro = 0;
56static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
55static int num_tx_qps = EHEA_NUM_TX_QP; 57static int num_tx_qps = EHEA_NUM_TX_QP;
56static int prop_carrier_state = 0; 58static int prop_carrier_state = 0;
57 59
@@ -62,6 +64,8 @@ module_param(rq3_entries, int, 0);
62module_param(sq_entries, int, 0); 64module_param(sq_entries, int, 0);
63module_param(prop_carrier_state, int, 0); 65module_param(prop_carrier_state, int, 0);
64module_param(use_mcs, int, 0); 66module_param(use_mcs, int, 0);
67module_param(use_lro, int, 0);
68module_param(lro_max_aggr, int, 0);
65module_param(num_tx_qps, int, 0); 69module_param(num_tx_qps, int, 0);
66 70
67MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS"); 71MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
@@ -82,6 +86,11 @@ MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue "
82 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); 86 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
83MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 "); 87MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
84 88
89MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
90 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
91MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
92 "Default = 0");
93
85static int port_name_cnt = 0; 94static int port_name_cnt = 0;
86static LIST_HEAD(adapter_list); 95static LIST_HEAD(adapter_list);
87u64 ehea_driver_flags = 0; 96u64 ehea_driver_flags = 0;
@@ -393,6 +402,60 @@ static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
393 return 0; 402 return 0;
394} 403}
395 404
405static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
406 void **tcph, u64 *hdr_flags, void *priv)
407{
408 struct ehea_cqe *cqe = priv;
409 unsigned int ip_len;
410 struct iphdr *iph;
411
412 /* non tcp/udp packets */
413 if (!cqe->header_length)
414 return -1;
415
416 /* non tcp packet */
417 skb_reset_network_header(skb);
418 iph = ip_hdr(skb);
419 if (iph->protocol != IPPROTO_TCP)
420 return -1;
421
422 ip_len = ip_hdrlen(skb);
423 skb_set_transport_header(skb, ip_len);
424 *tcph = tcp_hdr(skb);
425
426 /* check if ip header and tcp header are complete */
427 if (iph->tot_len < ip_len + tcp_hdrlen(skb))
428 return -1;
429
430 *hdr_flags = LRO_IPV4 | LRO_TCP;
431 *iphdr = iph;
432
433 return 0;
434}
435
436static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
437 struct sk_buff *skb)
438{
439 int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
440 && pr->port->vgrp;
441
442 if (use_lro) {
443 if (vlan_extracted)
444 lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
445 pr->port->vgrp,
446 cqe->vlan_tag,
447 cqe);
448 else
449 lro_receive_skb(&pr->lro_mgr, skb, cqe);
450 } else {
451 if (vlan_extracted)
452 vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
453 cqe->vlan_tag);
454 else
455 netif_receive_skb(skb);
456 }
457}
458
396static int ehea_proc_rwqes(struct net_device *dev, 459static int ehea_proc_rwqes(struct net_device *dev,
397 struct ehea_port_res *pr, 460 struct ehea_port_res *pr,
398 int budget) 461 int budget)
@@ -462,13 +525,7 @@ static int ehea_proc_rwqes(struct net_device *dev,
462 processed_rq3++; 525 processed_rq3++;
463 } 526 }
464 527
465 if ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 528 ehea_proc_skb(pr, cqe, skb);
466 && port->vgrp)
467 vlan_hwaccel_receive_skb(skb, port->vgrp,
468 cqe->vlan_tag);
469 else
470 netif_receive_skb(skb);
471
472 dev->last_rx = jiffies; 529 dev->last_rx = jiffies;
473 } else { 530 } else {
474 pr->p_stats.poll_receive_errors++; 531 pr->p_stats.poll_receive_errors++;
@@ -480,6 +537,8 @@ static int ehea_proc_rwqes(struct net_device *dev,
480 } 537 }
481 cqe = ehea_poll_rq1(qp, &wqe_index); 538 cqe = ehea_poll_rq1(qp, &wqe_index);
482 } 539 }
540 if (use_lro)
541 lro_flush_all(&pr->lro_mgr);
483 542
484 pr->rx_packets += processed; 543 pr->rx_packets += processed;
485 544
@@ -1231,6 +1290,15 @@ static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1231 1290
1232 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1291 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1233 1292
1293 pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1294 pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1295 pr->lro_mgr.lro_arr = pr->lro_desc;
1296 pr->lro_mgr.get_skb_header = get_skb_hdr;
1297 pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1298 pr->lro_mgr.dev = port->netdev;
1299 pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1300 pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1301
1234 ret = 0; 1302 ret = 0;
1235 goto out; 1303 goto out;
1236 1304
@@ -2682,6 +2750,8 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2682 goto out_dereg_bc; 2750 goto out_dereg_bc;
2683 } 2751 }
2684 2752
2753 port->lro_max_aggr = lro_max_aggr;
2754
2685 ret = ehea_get_jumboframe_status(port, &jumbo); 2755 ret = ehea_get_jumboframe_status(port, &jumbo);
2686 if (ret) 2756 if (ret)
2687 ehea_error("failed determining jumbo frame status for %s", 2757 ehea_error("failed determining jumbo frame status for %s",