obj-$(CONFIG_CTC) += ctc.o fsm.o cu3088.o
obj-$(CONFIG_LCS) += lcs.o cu3088.o
obj-$(CONFIG_CLAW) += claw.o cu3088.o
-qeth-y := qeth_main.o qeth_mpc.o qeth_sys.o qeth_eddp.o qeth_tso.o
+qeth-y := qeth_main.o qeth_mpc.o qeth_sys.o qeth_eddp.o
qeth-$(CONFIG_PROC_FS) += qeth_proc.o
obj-$(CONFIG_QETH) += qeth.o
#include "qeth_mpc.h"
-#define VERSION_QETH_H "$Revision: 1.137 $"
+#define VERSION_QETH_H "$Revision: 1.139 $"
#ifdef CONFIG_QETH_IPV6
#define QETH_VERSION_IPV6 ":IPv6"
} hdr;
} __attribute__ ((packed));
+/*TCP Segmentation Offload header*/
+struct qeth_hdr_ext_tso {
+ __u16 hdr_tot_len;
+ __u8 imb_hdr_no;
+ __u8 reserved;
+ __u8 hdr_type;
+ __u8 hdr_version;
+ __u16 hdr_len;
+ __u32 payload_len;
+ __u16 mss;
+ __u16 dg_hdr_len;
+ __u8 padding[16];
+} __attribute__ ((packed));
+
+struct qeth_hdr_tso {
+ struct qeth_hdr hdr; /*hdr->hdr.l3.xxx*/
+ struct qeth_hdr_ext_tso ext;
+} __attribute__ ((packed));
+
/* flags for qeth_hdr.flags */
#define QETH_HDR_PASSTHRU 0x10
return hdr;
}
-static inline int
-qeth_get_skb_data_len(struct sk_buff *skb)
-{
- int len = skb->len;
- int i;
-
- for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i)
- len -= skb_shinfo(skb)->frags[i].size;
- return len;
-}
inline static int
qeth_get_hlen(__u8 link_type)
switch (link_type) {
case QETH_LINK_TYPE_HSTR:
case QETH_LINK_TYPE_LANE_TR:
- return sizeof(struct qeth_hdr) + TR_HLEN;
+ return sizeof(struct qeth_hdr_tso) + TR_HLEN;
default:
#ifdef CONFIG_QETH_VLAN
- return sizeof(struct qeth_hdr) + VLAN_ETH_HLEN;
+ return sizeof(struct qeth_hdr_tso) + VLAN_ETH_HLEN;
#else
- return sizeof(struct qeth_hdr) + ETH_HLEN;
+ return sizeof(struct qeth_hdr_tso) + ETH_HLEN;
#endif
}
#else /* CONFIG_QETH_IPV6 */
#ifdef CONFIG_QETH_VLAN
- return sizeof(struct qeth_hdr) + VLAN_HLEN;
+ return sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
#else
- return sizeof(struct qeth_hdr);
+ return sizeof(struct qeth_hdr_tso);
#endif
#endif /* CONFIG_QETH_IPV6 */
}
/*
*
- * linux/drivers/s390/net/qeth_eddp.c ($Revision: 1.12 $)
+ * linux/drivers/s390/net/qeth_eddp.c ($Revision: 1.13 $)
*
* Enhanced Device Driver Packing (EDDP) support for the qeth driver.
*
*
* Author(s): Thomas Spatzier <tspat@de.ibm.com>
*
- * $Revision: 1.12 $ $Date: 2005/04/01 21:40:40 $
+ * $Revision: 1.13 $ $Date: 2005/05/04 20:19:18 $
*
*/
#include <linux/config.h>
qeth_eddp_buf_release_contexts(struct qeth_qdio_out_buffer *buf)
{
struct qeth_eddp_context_reference *ref;
-
+
QETH_DBF_TEXT(trace, 6, "eddprctx");
while (!list_empty(&buf->ctx_list)){
ref = list_entry(buf->ctx_list.next,
"buffer!\n");
goto out;
}
- }
+ }
/* check if the whole next skb fits into current buffer */
if ((QETH_MAX_BUFFER_ELEMENTS(queue->card) -
buf->next_element_to_fill)
* and increment ctx's refcnt */
must_refcnt = 1;
continue;
- }
+ }
if (must_refcnt){
must_refcnt = 0;
if (qeth_eddp_buf_ref_context(buf, ctx)){
static inline void
qeth_eddp_create_segment_hdrs(struct qeth_eddp_context *ctx,
- struct qeth_eddp_data *eddp)
+ struct qeth_eddp_data *eddp, int data_len)
{
u8 *page;
int page_remainder;
int page_offset;
- int hdr_len;
+ int pkt_len;
struct qeth_eddp_element *element;
QETH_DBF_TEXT(trace, 5, "eddpcrsh");
page = ctx->pages[ctx->offset >> PAGE_SHIFT];
page_offset = ctx->offset % PAGE_SIZE;
element = &ctx->elements[ctx->num_elements];
- hdr_len = eddp->nhl + eddp->thl;
+ pkt_len = eddp->nhl + eddp->thl + data_len;
/* FIXME: layer2 and VLAN !!! */
if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2)
- hdr_len += ETH_HLEN;
+ pkt_len += ETH_HLEN;
if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q))
- hdr_len += VLAN_HLEN;
- /* does complete header fit in current page ? */
+ pkt_len += VLAN_HLEN;
+ /* does complete packet fit in current page ? */
page_remainder = PAGE_SIZE - page_offset;
- if (page_remainder < (sizeof(struct qeth_hdr) + hdr_len)){
+ if (page_remainder < (sizeof(struct qeth_hdr) + pkt_len)){
/* no -> go to start of next page */
ctx->offset += page_remainder;
page = ctx->pages[ctx->offset >> PAGE_SHIFT];
int left_in_frag;
int copy_len;
u8 *src;
-
+
QETH_DBF_TEXT(trace, 5, "eddpcdtc");
if (skb_shinfo(eddp->skb)->nr_frags == 0) {
memcpy(dst, eddp->skb->data + eddp->skb_offset, len);
while (len > 0) {
if (eddp->frag < 0) {
/* we're in skb->data */
- left_in_frag = qeth_get_skb_data_len(eddp->skb)
+ left_in_frag = (eddp->skb->len - eddp->skb->data_len)
- eddp->skb_offset;
src = eddp->skb->data + eddp->skb_offset;
} else {
struct tcphdr *tcph;
int data_len;
u32 hcsum;
-
+
QETH_DBF_TEXT(trace, 5, "eddpftcp");
eddp->skb_offset = sizeof(struct qeth_hdr) + eddp->nhl + eddp->thl;
tcph = eddp->skb->h.th;
else
hcsum = qeth_eddp_check_tcp6_hdr(eddp, data_len);
/* fill the next segment into the context */
- qeth_eddp_create_segment_hdrs(ctx, eddp);
+ qeth_eddp_create_segment_hdrs(ctx, eddp, data_len);
qeth_eddp_create_segment_data_tcp(ctx, eddp, data_len, hcsum);
if (eddp->skb_offset >= eddp->skb->len)
break;
eddp->th.tcp.h.seq += data_len;
}
}
-
+
static inline int
qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx,
struct sk_buff *skb, struct qeth_hdr *qhdr)
{
struct qeth_eddp_data *eddp = NULL;
-
+
QETH_DBF_TEXT(trace, 5, "eddpficx");
/* create our segmentation headers and copy original headers */
if (skb->protocol == ETH_P_IP)
int hdr_len)
{
int skbs_per_page;
-
+
QETH_DBF_TEXT(trace, 5, "eddpcanp");
/* can we put multiple skbs in one page? */
skbs_per_page = PAGE_SIZE / (skb_shinfo(skb)->tso_size + hdr_len);
struct qeth_hdr *qhdr)
{
struct qeth_eddp_context *ctx = NULL;
-
+
QETH_DBF_TEXT(trace, 5, "creddpct");
if (skb->protocol == ETH_P_IP)
ctx = qeth_eddp_create_context_generic(card, skb,
/*
*
- * linux/drivers/s390/net/qeth_main.c ($Revision: 1.210 $)
+ * linux/drivers/s390/net/qeth_main.c ($Revision: 1.214 $)
*
* Linux on zSeries OSA Express and HiperSockets support
*
* Frank Pavlic (pavlic@de.ibm.com) and
* Thomas Spatzier <tspat@de.ibm.com>
*
- * $Revision: 1.210 $ $Date: 2005/04/18 17:27:39 $
+ * $Revision: 1.214 $ $Date: 2005/05/04 20:19:18 $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include "qeth_eddp.h"
#include "qeth_tso.h"
-#define VERSION_QETH_C "$Revision: 1.210 $"
+#define VERSION_QETH_C "$Revision: 1.214 $"
static const char *version = "qeth S/390 OSA-Express driver";
/**
static int
qeth_set_online(struct ccwgroup_device *);
+static int
+__qeth_set_online(struct ccwgroup_device *gdev, int recovery_mode);
+
static struct qeth_ipaddr *
qeth_get_addr_buffer(enum qeth_prot_versions);
wake_up(&card->wait_q);
}
-static int qeth_stop_card(struct qeth_card *);
+static int qeth_stop_card(struct qeth_card *, int);
static int
-qeth_set_offline(struct ccwgroup_device *cgdev)
+__qeth_set_offline(struct ccwgroup_device *cgdev, int recovery_mode)
{
struct qeth_card *card = (struct qeth_card *) cgdev->dev.driver_data;
int rc = 0;
QETH_DBF_HEX(setup, 3, &card, sizeof(void *));
recover_flag = card->state;
- if (qeth_stop_card(card) == -ERESTARTSYS){
+ if (qeth_stop_card(card, recovery_mode) == -ERESTARTSYS){
PRINT_WARN("Stopping card %s interrupted by user!\n",
CARD_BUS_ID(card));
return -ERESTARTSYS;
return 0;
}
+static int
+qeth_set_offline(struct ccwgroup_device *cgdev)
+{
+ return __qeth_set_offline(cgdev, 0);
+}
+
static int
qeth_wait_for_threads(struct qeth_card *card, unsigned long threads);
PRINT_WARN("Recovery of device %s started ...\n",
CARD_BUS_ID(card));
card->use_hard_stop = 1;
- qeth_set_offline(card->gdev);
- rc = qeth_set_online(card->gdev);
+ __qeth_set_offline(card->gdev,1);
+ rc = __qeth_set_online(card->gdev,1);
if (!rc)
PRINT_INFO("Device %s successfully recovered!\n",
CARD_BUS_ID(card));
qeth_prepare_skb(struct qeth_card *card, struct sk_buff **skb,
struct qeth_hdr **hdr, int ipv)
{
- int rc = 0;
#ifdef CONFIG_QETH_VLAN
u16 *tag;
#endif
QETH_DBF_TEXT(trace, 6, "prepskb");
- rc = qeth_realloc_headroom(card, skb, sizeof(struct qeth_hdr));
- if (rc)
- return rc;
#ifdef CONFIG_QETH_VLAN
if (card->vlangrp && vlan_tx_tag_present(*skb) &&
((ipv == 6) || card->options.layer2) ) {
static inline void
__qeth_fill_buffer(struct sk_buff *skb, struct qdio_buffer *buffer,
- int *next_element_to_fill)
+ int is_tso, int *next_element_to_fill)
{
int length = skb->len;
int length_here;
int element;
char *data;
- int first_lap = 1;
+ int first_lap ;
element = *next_element_to_fill;
data = skb->data;
+ first_lap = (is_tso == 0 ? 1 : 0);
+
while (length > 0) {
/* length_here is the remaining amount of data in this page */
length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
if (length < length_here)
length_here = length;
+
buffer->element[element].addr = data;
buffer->element[element].length = length_here;
length -= length_here;
- if (!length){
+ if (!length) {
if (first_lap)
buffer->element[element].flags = 0;
else
struct sk_buff *skb)
{
struct qdio_buffer *buffer;
- int flush_cnt = 0;
+ struct qeth_hdr_tso *hdr;
+ int flush_cnt = 0, hdr_len, large_send = 0;
QETH_DBF_TEXT(trace, 6, "qdfillbf");
+
buffer = buf->buffer;
atomic_inc(&skb->users);
skb_queue_tail(&buf->skb_list, skb);
+
+ hdr = (struct qeth_hdr_tso *) skb->data;
+ /*check first on TSO ....*/
+ if (hdr->hdr.hdr.l3.id == QETH_HEADER_TYPE_TSO) {
+ int element = buf->next_element_to_fill;
+
+ hdr_len = sizeof(struct qeth_hdr_tso) + hdr->ext.dg_hdr_len;
+ /*fill first buffer entry only with header information */
+ buffer->element[element].addr = skb->data;
+ buffer->element[element].length = hdr_len;
+ buffer->element[element].flags = SBAL_FLAGS_FIRST_FRAG;
+ buf->next_element_to_fill++;
+ skb->data += hdr_len;
+ skb->len -= hdr_len;
+ large_send = 1;
+ }
if (skb_shinfo(skb)->nr_frags == 0)
- __qeth_fill_buffer(skb, buffer,
+ __qeth_fill_buffer(skb, buffer, large_send,
(int *)&buf->next_element_to_fill);
else
- __qeth_fill_buffer_frag(skb, buffer, 0,
+ __qeth_fill_buffer_frag(skb, buffer, large_send,
(int *)&buf->next_element_to_fill);
if (!queue->do_pack) {
return rc;
}
+static inline int
+qeth_get_elements_no(struct qeth_card *card, void *hdr, struct sk_buff *skb)
+{
+ int elements_needed = 0;
+
+ if (skb_shinfo(skb)->nr_frags > 0) {
+ elements_needed = (skb_shinfo(skb)->nr_frags + 1);
+ }
+ if (elements_needed == 0 )
+ elements_needed = 1 + (((((unsigned long) hdr) % PAGE_SIZE)
+ + skb->len) >> PAGE_SHIFT);
+ if (elements_needed > QETH_MAX_BUFFER_ELEMENTS(card)){
+ PRINT_ERR("qeth_do_send_packet: invalid size of "
+ "IP packet. Discarded.");
+ return 0;
+ }
+ return elements_needed;
+}
+
static inline int
qeth_send_packet(struct qeth_card *card, struct sk_buff *skb)
{
if (skb_shinfo(skb)->tso_size)
large_send = card->options.large_send;
- if ((rc = qeth_prepare_skb(card, &skb, &hdr, ipv))){
- QETH_DBF_TEXT_(trace, 4, "pskbe%d", rc);
- return rc;
- }
/*are we able to do TSO ? If so ,prepare and send it from here */
if ((large_send == QETH_LARGE_SEND_TSO) &&
(cast_type == RTN_UNSPEC)) {
- rc = qeth_tso_send_packet(card, skb, queue,
- ipv, cast_type);
- goto do_statistics;
+ rc = qeth_tso_prepare_packet(card, skb, ipv, cast_type);
+ if (rc) {
+ card->stats.tx_dropped++;
+ card->stats.tx_errors++;
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ }
+ elements_needed++;
+ } else {
+ if ((rc = qeth_prepare_skb(card, &skb, &hdr, ipv))) {
+ QETH_DBF_TEXT_(trace, 4, "pskbe%d", rc);
+ return rc;
+ }
+ qeth_fill_header(card, hdr, skb, ipv, cast_type);
}
- qeth_fill_header(card, hdr, skb, ipv, cast_type);
if (large_send == QETH_LARGE_SEND_EDDP) {
ctx = qeth_eddp_create_context(card, skb, hdr);
if (ctx == NULL) {
return -EINVAL;
}
} else {
- elements_needed = qeth_get_elements_no(card,(void*) hdr, skb);
+ elements_needed += qeth_get_elements_no(card,(void*) hdr, skb);
if (!elements_needed)
return -EINVAL;
}
else
rc = qeth_do_send_packet_fast(card, queue, skb, hdr,
elements_needed, ctx);
-do_statistics:
if (!rc){
card->stats.tx_packets++;
card->stats.tx_bytes += skb->len;
#ifdef CONFIG_QETH_PERF_STATS
- if (skb_shinfo(skb)->tso_size) {
+ if (skb_shinfo(skb)->tso_size &&
+ !(large_send == QETH_LARGE_SEND_NO)) {
card->perf_stats.large_send_bytes += skb->len;
card->perf_stats.large_send_cnt++;
}
}
static int
-qeth_stop_card(struct qeth_card *card)
+qeth_stop_card(struct qeth_card *card, int recovery_mode)
{
int rc = 0;
if (card->read.state == CH_STATE_UP &&
card->write.state == CH_STATE_UP &&
(card->state == CARD_STATE_UP)) {
- rtnl_lock();
- dev_close(card->dev);
- rtnl_unlock();
+ if(recovery_mode) {
+ qeth_stop(card->dev);
+ } else {
+ rtnl_lock();
+ dev_close(card->dev);
+ rtnl_unlock();
+ }
if (!card->use_hard_stop) {
__u8 *mac = &card->dev->dev_addr[0];
rc = qeth_layer2_send_delmac(card, mac);
}
static void
-qeth_start_again(struct qeth_card *card)
+qeth_start_again(struct qeth_card *card, int recovery_mode)
{
QETH_DBF_TEXT(setup ,2, "startag");
- rtnl_lock();
- dev_open(card->dev);
- rtnl_unlock();
+ if(recovery_mode) {
+ qeth_open(card->dev);
+ } else {
+ rtnl_lock();
+ dev_open(card->dev);
+ rtnl_unlock();
+ }
/* this also sets saved unicast addresses */
qeth_set_multicast_list(card->dev);
}
static int
-qeth_set_online(struct ccwgroup_device *gdev)
+__qeth_set_online(struct ccwgroup_device *gdev, int recovery_mode)
{
struct qeth_card *card = gdev->dev.driver_data;
int rc = 0;
* we can also use this state for recovery purposes*/
qeth_set_allowed_threads(card, 0xffffffff, 0);
if (recover_flag == CARD_STATE_RECOVER)
- qeth_start_again(card);
+ qeth_start_again(card, recovery_mode);
qeth_notify_processes();
return 0;
out_remove:
card->use_hard_stop = 1;
- qeth_stop_card(card);
+ qeth_stop_card(card, 0);
ccw_device_set_offline(CARD_DDEV(card));
ccw_device_set_offline(CARD_WDEV(card));
ccw_device_set_offline(CARD_RDEV(card));
return -ENODEV;
}
+static int
+qeth_set_online(struct ccwgroup_device *gdev)
+{
+ return __qeth_set_online(gdev, 0);
+}
+
static struct ccw_device_id qeth_ids[] = {
{CCW_DEVICE(0x1731, 0x01), driver_info:QETH_CARD_TYPE_OSAE},
{CCW_DEVICE(0x1731, 0x05), driver_info:QETH_CARD_TYPE_IQD},
+++ /dev/null
-/*
- * linux/drivers/s390/net/qeth_tso.c ($Revision: 1.7 $)
- *
- * Header file for qeth TCP Segmentation Offload support.
- *
- * Copyright 2004 IBM Corporation
- *
- * Author(s): Frank Pavlic <pavlic@de.ibm.com>
- *
- * $Revision: 1.7 $ $Date: 2005/04/01 21:40:41 $
- *
- */
-
-#include <linux/skbuff.h>
-#include <linux/tcp.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <net/ip6_checksum.h>
-#include "qeth.h"
-#include "qeth_mpc.h"
-#include "qeth_tso.h"
-
-/**
- * skb already partially prepared
- * classic qdio header in skb->data
- * */
-static inline struct qeth_hdr_tso *
-qeth_tso_prepare_skb(struct qeth_card *card, struct sk_buff **skb)
-{
- int rc = 0;
-
- QETH_DBF_TEXT(trace, 5, "tsoprsk");
- rc = qeth_realloc_headroom(card, skb,sizeof(struct qeth_hdr_ext_tso));
- if (rc)
- return NULL;
-
- return qeth_push_skb(card, skb, sizeof(struct qeth_hdr_ext_tso));
-}
-
-/**
- * fill header for a TSO packet
- */
-static inline void
-qeth_tso_fill_header(struct qeth_card *card, struct sk_buff *skb)
-{
- struct qeth_hdr_tso *hdr;
- struct tcphdr *tcph;
- struct iphdr *iph;
-
- QETH_DBF_TEXT(trace, 5, "tsofhdr");
-
- hdr = (struct qeth_hdr_tso *) skb->data;
- iph = skb->nh.iph;
- tcph = skb->h.th;
- /*fix header to TSO values ...*/
- hdr->hdr.hdr.l3.id = QETH_HEADER_TYPE_TSO;
- /*set values which are fix for the first approach ...*/
- hdr->ext.hdr_tot_len = (__u16) sizeof(struct qeth_hdr_ext_tso);
- hdr->ext.imb_hdr_no = 1;
- hdr->ext.hdr_type = 1;
- hdr->ext.hdr_version = 1;
- hdr->ext.hdr_len = 28;
- /*insert non-fix values */
- hdr->ext.mss = skb_shinfo(skb)->tso_size;
- hdr->ext.dg_hdr_len = (__u16)(iph->ihl*4 + tcph->doff*4);
- hdr->ext.payload_len = (__u16)(skb->len - hdr->ext.dg_hdr_len -
- sizeof(struct qeth_hdr_tso));
-}
-
-/**
- * change some header values as requested by hardware
- */
-static inline void
-qeth_tso_set_tcpip_header(struct qeth_card *card, struct sk_buff *skb)
-{
- struct iphdr *iph;
- struct ipv6hdr *ip6h;
- struct tcphdr *tcph;
-
- iph = skb->nh.iph;
- ip6h = skb->nh.ipv6h;
- tcph = skb->h.th;
-
- tcph->check = 0;
- if (skb->protocol == ETH_P_IPV6) {
- ip6h->payload_len = 0;
- tcph->check = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
- 0, IPPROTO_TCP, 0);
- return;
- }
- /*OSA want us to set these values ...*/
- tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
- 0, IPPROTO_TCP, 0);
- iph->tot_len = 0;
- iph->check = 0;
-}
-
-static inline struct qeth_hdr_tso *
-qeth_tso_prepare_packet(struct qeth_card *card, struct sk_buff *skb,
- int ipv, int cast_type)
-{
- struct qeth_hdr_tso *hdr;
- int rc = 0;
-
- QETH_DBF_TEXT(trace, 5, "tsoprep");
-
- /*get headroom for tso qdio header */
- hdr = (struct qeth_hdr_tso *) qeth_tso_prepare_skb(card, &skb);
- if (hdr == NULL) {
- QETH_DBF_TEXT_(trace, 4, "2err%d", rc);
- return NULL;
- }
- memset(hdr, 0, sizeof(struct qeth_hdr_tso));
- /*fill first 32 bytes of qdio header as used
- *FIXME: TSO has two struct members
- * with different names but same size
- * */
- qeth_fill_header(card, &hdr->hdr, skb, ipv, cast_type);
- qeth_tso_fill_header(card, skb);
- qeth_tso_set_tcpip_header(card, skb);
- return hdr;
-}
-
-static inline int
-qeth_tso_get_queue_buffer(struct qeth_qdio_out_q *queue)
-{
- struct qeth_qdio_out_buffer *buffer;
- int flush_cnt = 0;
-
- QETH_DBF_TEXT(trace, 5, "tsobuf");
-
- /* force to non-packing*/
- if (queue->do_pack)
- queue->do_pack = 0;
- buffer = &queue->bufs[queue->next_buf_to_fill];
- /* get a new buffer if current is already in use*/
- if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
- (buffer->next_element_to_fill > 0)) {
- atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
- queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
- QDIO_MAX_BUFFERS_PER_Q;
- flush_cnt++;
- }
- return flush_cnt;
-}
-
-
-static inline int
-qeth_tso_fill_buffer(struct qeth_qdio_out_buffer *buf,
- struct sk_buff *skb)
-{
- int length, length_here, element;
- int hdr_len;
- struct qdio_buffer *buffer;
- struct qeth_hdr_tso *hdr;
- char *data;
-
- QETH_DBF_TEXT(trace, 3, "tsfilbuf");
-
- /*increment user count and queue skb ...*/
- atomic_inc(&skb->users);
- skb_queue_tail(&buf->skb_list, skb);
-
- /*initialize all variables...*/
- buffer = buf->buffer;
- hdr = (struct qeth_hdr_tso *)skb->data;
- hdr_len = sizeof(struct qeth_hdr_tso) + hdr->ext.dg_hdr_len;
- data = skb->data + hdr_len;
- length = skb->len - hdr_len;
- element = buf->next_element_to_fill;
- /*fill first buffer entry only with header information */
- buffer->element[element].addr = skb->data;
- buffer->element[element].length = hdr_len;
- buffer->element[element].flags = SBAL_FLAGS_FIRST_FRAG;
- buf->next_element_to_fill++;
- /*check if we have frags ...*/
- if (skb_shinfo(skb)->nr_frags > 0) {
- skb->len = length;
- skb->data = data;
- __qeth_fill_buffer_frag(skb, buffer,1,
- (int *)&buf->next_element_to_fill);
- goto out;
- }
-
- /*... if not, use this */
- element++;
- while (length > 0) {
- /* length_here is the remaining amount of data in this page */
- length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
- if (length < length_here)
- length_here = length;
- buffer->element[element].addr = data;
- buffer->element[element].length = length_here;
- length -= length_here;
- if (!length)
- buffer->element[element].flags =
- SBAL_FLAGS_LAST_FRAG;
- else
- buffer->element[element].flags =
- SBAL_FLAGS_MIDDLE_FRAG;
- data += length_here;
- element++;
- }
- buf->next_element_to_fill = element;
-out:
- /*prime buffer now ...*/
- atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
- return 1;
-}
-
-int
-qeth_tso_send_packet(struct qeth_card *card, struct sk_buff *skb,
- struct qeth_qdio_out_q *queue, int ipv, int cast_type)
-{
- int flush_cnt = 0;
- struct qeth_hdr_tso *hdr;
- struct qeth_qdio_out_buffer *buffer;
- int start_index;
-
- QETH_DBF_TEXT(trace, 3, "tsosend");
-
- if (!(hdr = qeth_tso_prepare_packet(card, skb, ipv, cast_type)))
- return -ENOMEM;
- /*check if skb fits in one SBAL ...*/
- if (!(qeth_get_elements_no(card, (void*)hdr, skb)))
- return -EINVAL;
- /*lock queue, force switching to non-packing and send it ...*/
- while (atomic_compare_and_swap(QETH_OUT_Q_UNLOCKED,
- QETH_OUT_Q_LOCKED,
- &queue->state));
- start_index = queue->next_buf_to_fill;
- buffer = &queue->bufs[queue->next_buf_to_fill];
- /*check if card is too busy ...*/
- if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY){
- card->stats.tx_dropped++;
- goto out;
- }
- /*let's force to non-packing and get a new SBAL*/
- flush_cnt += qeth_tso_get_queue_buffer(queue);
- buffer = &queue->bufs[queue->next_buf_to_fill];
- if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
- card->stats.tx_dropped++;
- goto out;
- }
- flush_cnt += qeth_tso_fill_buffer(buffer, skb);
- queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
- QDIO_MAX_BUFFERS_PER_Q;
-out:
- atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
- if (flush_cnt)
- qeth_flush_buffers(queue, 0, start_index, flush_cnt);
- /*do some statistics */
- card->stats.tx_packets++;
- card->stats.tx_bytes += skb->len;
- return 0;
-}
/*
- * linux/drivers/s390/net/qeth_tso.h ($Revision: 1.5 $)
+ * linux/drivers/s390/net/qeth_tso.h ($Revision: 1.7 $)
*
* Header file for qeth TCP Segmentation Offload support.
*
*
* Author(s): Frank Pavlic <pavlic@de.ibm.com>
*
- * $Revision: 1.5 $ $Date: 2005/04/01 21:40:41 $
+ * $Revision: 1.7 $ $Date: 2005/05/04 20:19:18 $
*
*/
#ifndef __QETH_TSO_H__
#define __QETH_TSO_H__
+#include <linux/skbuff.h>
+#include <linux/tcp.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <net/ip6_checksum.h>
+#include "qeth.h"
+#include "qeth_mpc.h"
-extern int
-qeth_tso_send_packet(struct qeth_card *, struct sk_buff *,
- struct qeth_qdio_out_q *, int , int);
-struct qeth_hdr_ext_tso {
- __u16 hdr_tot_len;
- __u8 imb_hdr_no;
- __u8 reserved;
- __u8 hdr_type;
- __u8 hdr_version;
- __u16 hdr_len;
- __u32 payload_len;
- __u16 mss;
- __u16 dg_hdr_len;
- __u8 padding[16];
-} __attribute__ ((packed));
+static inline struct qeth_hdr_tso *
+qeth_tso_prepare_skb(struct qeth_card *card, struct sk_buff **skb)
+{
+ QETH_DBF_TEXT(trace, 5, "tsoprsk");
+ return qeth_push_skb(card, skb, sizeof(struct qeth_hdr_tso));
+}
+
+/**
+ * fill header for a TSO packet
+ */
+static inline void
+qeth_tso_fill_header(struct qeth_card *card, struct sk_buff *skb)
+{
+ struct qeth_hdr_tso *hdr;
+ struct tcphdr *tcph;
+ struct iphdr *iph;
-struct qeth_hdr_tso {
- struct qeth_hdr hdr; /*hdr->hdr.l3.xxx*/
- struct qeth_hdr_ext_tso ext;
-} __attribute__ ((packed));
+ QETH_DBF_TEXT(trace, 5, "tsofhdr");
+
+ hdr = (struct qeth_hdr_tso *) skb->data;
+ iph = skb->nh.iph;
+ tcph = skb->h.th;
+ /*fix header to TSO values ...*/
+ hdr->hdr.hdr.l3.id = QETH_HEADER_TYPE_TSO;
+ /*set values which are fix for the first approach ...*/
+ hdr->ext.hdr_tot_len = (__u16) sizeof(struct qeth_hdr_ext_tso);
+ hdr->ext.imb_hdr_no = 1;
+ hdr->ext.hdr_type = 1;
+ hdr->ext.hdr_version = 1;
+ hdr->ext.hdr_len = 28;
+ /*insert non-fix values */
+ hdr->ext.mss = skb_shinfo(skb)->tso_size;
+ hdr->ext.dg_hdr_len = (__u16)(iph->ihl*4 + tcph->doff*4);
+ hdr->ext.payload_len = (__u16)(skb->len - hdr->ext.dg_hdr_len -
+ sizeof(struct qeth_hdr_tso));
+}
+
+/**
+ * change some header values as requested by hardware
+ */
+static inline void
+qeth_tso_set_tcpip_header(struct qeth_card *card, struct sk_buff *skb)
+{
+ struct iphdr *iph;
+ struct ipv6hdr *ip6h;
+ struct tcphdr *tcph;
+
+ iph = skb->nh.iph;
+ ip6h = skb->nh.ipv6h;
+ tcph = skb->h.th;
+
+ tcph->check = 0;
+ if (skb->protocol == ETH_P_IPV6) {
+ ip6h->payload_len = 0;
+ tcph->check = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
+ 0, IPPROTO_TCP, 0);
+ return;
+ }
+ /*OSA want us to set these values ...*/
+ tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
+ 0, IPPROTO_TCP, 0);
+ iph->tot_len = 0;
+ iph->check = 0;
+}
-/*some helper functions*/
static inline int
-qeth_get_elements_no(struct qeth_card *card, void *hdr, struct sk_buff *skb)
+qeth_tso_prepare_packet(struct qeth_card *card, struct sk_buff *skb,
+ int ipv, int cast_type)
{
- int elements_needed = 0;
+ struct qeth_hdr_tso *hdr;
- if (skb_shinfo(skb)->nr_frags > 0)
- elements_needed = (skb_shinfo(skb)->nr_frags + 1);
- if (elements_needed == 0 )
- elements_needed = 1 + (((((unsigned long) hdr) % PAGE_SIZE)
- + skb->len) >> PAGE_SHIFT);
- if (elements_needed > QETH_MAX_BUFFER_ELEMENTS(card)){
- PRINT_ERR("qeth_do_send_packet: invalid size of "
- "IP packet. Discarded.");
- return 0;
- }
- return elements_needed;
+ QETH_DBF_TEXT(trace, 5, "tsoprep");
+
+ hdr = (struct qeth_hdr_tso *) qeth_tso_prepare_skb(card, &skb);
+ if (hdr == NULL) {
+ QETH_DBF_TEXT(trace, 4, "tsoperr");
+ return -ENOMEM;
+ }
+ memset(hdr, 0, sizeof(struct qeth_hdr_tso));
+ /*fill first 32 bytes of qdio header as used
+ *FIXME: TSO has two struct members
+ * with different names but same size
+ * */
+ qeth_fill_header(card, &hdr->hdr, skb, ipv, cast_type);
+ qeth_tso_fill_header(card, skb);
+ qeth_tso_set_tcpip_header(card, skb);
+ return 0;
}
static inline void
__qeth_fill_buffer_frag(struct sk_buff *skb, struct qdio_buffer *buffer,
int is_tso, int *next_element_to_fill)
{
- int length = skb->len;
struct skb_frag_struct *frag;
int fragno;
unsigned long addr;
- int element;
- int first_lap = 1;
-
- fragno = skb_shinfo(skb)->nr_frags; /* start with last frag */
- element = *next_element_to_fill + fragno;
- while (length > 0) {
- if (fragno > 0) {
- frag = &skb_shinfo(skb)->frags[fragno - 1];
- addr = (page_to_pfn(frag->page) << PAGE_SHIFT) +
- frag->page_offset;
- buffer->element[element].addr = (char *)addr;
- buffer->element[element].length = frag->size;
- length -= frag->size;
- if (first_lap)
- buffer->element[element].flags =
- SBAL_FLAGS_LAST_FRAG;
- else
- buffer->element[element].flags =
- SBAL_FLAGS_MIDDLE_FRAG;
- } else {
- buffer->element[element].addr = skb->data;
- buffer->element[element].length = length;
- length = 0;
- if (is_tso)
- buffer->element[element].flags =
- SBAL_FLAGS_MIDDLE_FRAG;
- else
- buffer->element[element].flags =
- SBAL_FLAGS_FIRST_FRAG;
- }
- element--;
- fragno--;
- first_lap = 0;
+ int element, cnt, dlen;
+
+ fragno = skb_shinfo(skb)->nr_frags;
+ element = *next_element_to_fill;
+ dlen = 0;
+
+ if (is_tso)
+ buffer->element[element].flags =
+ SBAL_FLAGS_MIDDLE_FRAG;
+ else
+ buffer->element[element].flags =
+ SBAL_FLAGS_FIRST_FRAG;
+ if ( (dlen = (skb->len - skb->data_len)) ) {
+ buffer->element[element].addr = skb->data;
+ buffer->element[element].length = dlen;
+ element++;
}
- *next_element_to_fill += skb_shinfo(skb)->nr_frags + 1;
+ for (cnt = 0; cnt < fragno; cnt++) {
+ frag = &skb_shinfo(skb)->frags[cnt];
+ addr = (page_to_pfn(frag->page) << PAGE_SHIFT) +
+ frag->page_offset;
+ buffer->element[element].addr = (char *)addr;
+ buffer->element[element].length = frag->size;
+ if (cnt < (fragno - 1))
+ buffer->element[element].flags =
+ SBAL_FLAGS_MIDDLE_FRAG;
+ else
+ buffer->element[element].flags =
+ SBAL_FLAGS_LAST_FRAG;
+ element++;
+ }
+ *next_element_to_fill = element;
}
-
#endif /* __QETH_TSO_H__ */
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