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path: root/drivers/s390/net/qeth_eddp.c
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-rw-r--r--drivers/s390/net/qeth_eddp.c634
1 files changed, 0 insertions, 634 deletions
diff --git a/drivers/s390/net/qeth_eddp.c b/drivers/s390/net/qeth_eddp.c
deleted file mode 100644
index e3c268cfbffe..000000000000
--- a/drivers/s390/net/qeth_eddp.c
+++ /dev/null
@@ -1,634 +0,0 @@
1/*
2 * linux/drivers/s390/net/qeth_eddp.c
3 *
4 * Enhanced Device Driver Packing (EDDP) support for the qeth driver.
5 *
6 * Copyright 2004 IBM Corporation
7 *
8 * Author(s): Thomas Spatzier <tspat@de.ibm.com>
9 *
10 */
11#include <linux/errno.h>
12#include <linux/ip.h>
13#include <linux/inetdevice.h>
14#include <linux/netdevice.h>
15#include <linux/kernel.h>
16#include <linux/tcp.h>
17#include <net/tcp.h>
18#include <linux/skbuff.h>
19
20#include <net/ip.h>
21
22#include "qeth.h"
23#include "qeth_mpc.h"
24#include "qeth_eddp.h"
25
26int
27qeth_eddp_check_buffers_for_context(struct qeth_qdio_out_q *queue,
28 struct qeth_eddp_context *ctx)
29{
30 int index = queue->next_buf_to_fill;
31 int elements_needed = ctx->num_elements;
32 int elements_in_buffer;
33 int skbs_in_buffer;
34 int buffers_needed = 0;
35
36 QETH_DBF_TEXT(trace, 5, "eddpcbfc");
37 while(elements_needed > 0) {
38 buffers_needed++;
39 if (atomic_read(&queue->bufs[index].state) !=
40 QETH_QDIO_BUF_EMPTY)
41 return -EBUSY;
42
43 elements_in_buffer = QETH_MAX_BUFFER_ELEMENTS(queue->card) -
44 queue->bufs[index].next_element_to_fill;
45 skbs_in_buffer = elements_in_buffer / ctx->elements_per_skb;
46 elements_needed -= skbs_in_buffer * ctx->elements_per_skb;
47 index = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
48 }
49 return buffers_needed;
50}
51
52static void
53qeth_eddp_free_context(struct qeth_eddp_context *ctx)
54{
55 int i;
56
57 QETH_DBF_TEXT(trace, 5, "eddpfctx");
58 for (i = 0; i < ctx->num_pages; ++i)
59 free_page((unsigned long)ctx->pages[i]);
60 kfree(ctx->pages);
61 kfree(ctx->elements);
62 kfree(ctx);
63}
64
65
66static inline void
67qeth_eddp_get_context(struct qeth_eddp_context *ctx)
68{
69 atomic_inc(&ctx->refcnt);
70}
71
72void
73qeth_eddp_put_context(struct qeth_eddp_context *ctx)
74{
75 if (atomic_dec_return(&ctx->refcnt) == 0)
76 qeth_eddp_free_context(ctx);
77}
78
79void
80qeth_eddp_buf_release_contexts(struct qeth_qdio_out_buffer *buf)
81{
82 struct qeth_eddp_context_reference *ref;
83
84 QETH_DBF_TEXT(trace, 6, "eddprctx");
85 while (!list_empty(&buf->ctx_list)){
86 ref = list_entry(buf->ctx_list.next,
87 struct qeth_eddp_context_reference, list);
88 qeth_eddp_put_context(ref->ctx);
89 list_del(&ref->list);
90 kfree(ref);
91 }
92}
93
94static int
95qeth_eddp_buf_ref_context(struct qeth_qdio_out_buffer *buf,
96 struct qeth_eddp_context *ctx)
97{
98 struct qeth_eddp_context_reference *ref;
99
100 QETH_DBF_TEXT(trace, 6, "eddprfcx");
101 ref = kmalloc(sizeof(struct qeth_eddp_context_reference), GFP_ATOMIC);
102 if (ref == NULL)
103 return -ENOMEM;
104 qeth_eddp_get_context(ctx);
105 ref->ctx = ctx;
106 list_add_tail(&ref->list, &buf->ctx_list);
107 return 0;
108}
109
110int
111qeth_eddp_fill_buffer(struct qeth_qdio_out_q *queue,
112 struct qeth_eddp_context *ctx,
113 int index)
114{
115 struct qeth_qdio_out_buffer *buf = NULL;
116 struct qdio_buffer *buffer;
117 int elements = ctx->num_elements;
118 int element = 0;
119 int flush_cnt = 0;
120 int must_refcnt = 1;
121 int i;
122
123 QETH_DBF_TEXT(trace, 5, "eddpfibu");
124 while (elements > 0) {
125 buf = &queue->bufs[index];
126 if (atomic_read(&buf->state) != QETH_QDIO_BUF_EMPTY){
127 /* normally this should not happen since we checked for
128 * available elements in qeth_check_elements_for_context
129 */
130 if (element == 0)
131 return -EBUSY;
132 else {
133 PRINT_WARN("could only partially fill eddp "
134 "buffer!\n");
135 goto out;
136 }
137 }
138 /* check if the whole next skb fits into current buffer */
139 if ((QETH_MAX_BUFFER_ELEMENTS(queue->card) -
140 buf->next_element_to_fill)
141 < ctx->elements_per_skb){
142 /* no -> go to next buffer */
143 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
144 index = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
145 flush_cnt++;
146 /* new buffer, so we have to add ctx to buffer'ctx_list
147 * and increment ctx's refcnt */
148 must_refcnt = 1;
149 continue;
150 }
151 if (must_refcnt){
152 must_refcnt = 0;
153 if (qeth_eddp_buf_ref_context(buf, ctx)){
154 PRINT_WARN("no memory to create eddp context "
155 "reference\n");
156 goto out_check;
157 }
158 }
159 buffer = buf->buffer;
160 /* fill one skb into buffer */
161 for (i = 0; i < ctx->elements_per_skb; ++i){
162 if (ctx->elements[element].length != 0) {
163 buffer->element[buf->next_element_to_fill].
164 addr = ctx->elements[element].addr;
165 buffer->element[buf->next_element_to_fill].
166 length = ctx->elements[element].length;
167 buffer->element[buf->next_element_to_fill].
168 flags = ctx->elements[element].flags;
169 buf->next_element_to_fill++;
170 }
171 element++;
172 elements--;
173 }
174 }
175out_check:
176 if (!queue->do_pack) {
177 QETH_DBF_TEXT(trace, 6, "fillbfnp");
178 /* set state to PRIMED -> will be flushed */
179 if (buf->next_element_to_fill > 0){
180 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
181 flush_cnt++;
182 }
183 } else {
184 if (queue->card->options.performance_stats)
185 queue->card->perf_stats.skbs_sent_pack++;
186 QETH_DBF_TEXT(trace, 6, "fillbfpa");
187 if (buf->next_element_to_fill >=
188 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
189 /*
190 * packed buffer if full -> set state PRIMED
191 * -> will be flushed
192 */
193 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
194 flush_cnt++;
195 }
196 }
197out:
198 return flush_cnt;
199}
200
201static void
202qeth_eddp_create_segment_hdrs(struct qeth_eddp_context *ctx,
203 struct qeth_eddp_data *eddp, int data_len)
204{
205 u8 *page;
206 int page_remainder;
207 int page_offset;
208 int pkt_len;
209 struct qeth_eddp_element *element;
210
211 QETH_DBF_TEXT(trace, 5, "eddpcrsh");
212 page = ctx->pages[ctx->offset >> PAGE_SHIFT];
213 page_offset = ctx->offset % PAGE_SIZE;
214 element = &ctx->elements[ctx->num_elements];
215 pkt_len = eddp->nhl + eddp->thl + data_len;
216 /* FIXME: layer2 and VLAN !!! */
217 if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2)
218 pkt_len += ETH_HLEN;
219 if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q))
220 pkt_len += VLAN_HLEN;
221 /* does complete packet fit in current page ? */
222 page_remainder = PAGE_SIZE - page_offset;
223 if (page_remainder < (sizeof(struct qeth_hdr) + pkt_len)){
224 /* no -> go to start of next page */
225 ctx->offset += page_remainder;
226 page = ctx->pages[ctx->offset >> PAGE_SHIFT];
227 page_offset = 0;
228 }
229 memcpy(page + page_offset, &eddp->qh, sizeof(struct qeth_hdr));
230 element->addr = page + page_offset;
231 element->length = sizeof(struct qeth_hdr);
232 ctx->offset += sizeof(struct qeth_hdr);
233 page_offset += sizeof(struct qeth_hdr);
234 /* add mac header (?) */
235 if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2){
236 memcpy(page + page_offset, &eddp->mac, ETH_HLEN);
237 element->length += ETH_HLEN;
238 ctx->offset += ETH_HLEN;
239 page_offset += ETH_HLEN;
240 }
241 /* add VLAN tag */
242 if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q)){
243 memcpy(page + page_offset, &eddp->vlan, VLAN_HLEN);
244 element->length += VLAN_HLEN;
245 ctx->offset += VLAN_HLEN;
246 page_offset += VLAN_HLEN;
247 }
248 /* add network header */
249 memcpy(page + page_offset, (u8 *)&eddp->nh, eddp->nhl);
250 element->length += eddp->nhl;
251 eddp->nh_in_ctx = page + page_offset;
252 ctx->offset += eddp->nhl;
253 page_offset += eddp->nhl;
254 /* add transport header */
255 memcpy(page + page_offset, (u8 *)&eddp->th, eddp->thl);
256 element->length += eddp->thl;
257 eddp->th_in_ctx = page + page_offset;
258 ctx->offset += eddp->thl;
259}
260
261static void
262qeth_eddp_copy_data_tcp(char *dst, struct qeth_eddp_data *eddp, int len,
263 __wsum *hcsum)
264{
265 struct skb_frag_struct *frag;
266 int left_in_frag;
267 int copy_len;
268 u8 *src;
269
270 QETH_DBF_TEXT(trace, 5, "eddpcdtc");
271 if (skb_shinfo(eddp->skb)->nr_frags == 0) {
272 skb_copy_from_linear_data_offset(eddp->skb, eddp->skb_offset,
273 dst, len);
274 *hcsum = csum_partial(eddp->skb->data + eddp->skb_offset, len,
275 *hcsum);
276 eddp->skb_offset += len;
277 } else {
278 while (len > 0) {
279 if (eddp->frag < 0) {
280 /* we're in skb->data */
281 left_in_frag = (eddp->skb->len - eddp->skb->data_len)
282 - eddp->skb_offset;
283 src = eddp->skb->data + eddp->skb_offset;
284 } else {
285 frag = &skb_shinfo(eddp->skb)->
286 frags[eddp->frag];
287 left_in_frag = frag->size - eddp->frag_offset;
288 src = (u8 *)(
289 (page_to_pfn(frag->page) << PAGE_SHIFT)+
290 frag->page_offset + eddp->frag_offset);
291 }
292 if (left_in_frag <= 0) {
293 eddp->frag++;
294 eddp->frag_offset = 0;
295 continue;
296 }
297 copy_len = min(left_in_frag, len);
298 memcpy(dst, src, copy_len);
299 *hcsum = csum_partial(src, copy_len, *hcsum);
300 dst += copy_len;
301 eddp->frag_offset += copy_len;
302 eddp->skb_offset += copy_len;
303 len -= copy_len;
304 }
305 }
306}
307
308static void
309qeth_eddp_create_segment_data_tcp(struct qeth_eddp_context *ctx,
310 struct qeth_eddp_data *eddp, int data_len,
311 __wsum hcsum)
312{
313 u8 *page;
314 int page_remainder;
315 int page_offset;
316 struct qeth_eddp_element *element;
317 int first_lap = 1;
318
319 QETH_DBF_TEXT(trace, 5, "eddpcsdt");
320 page = ctx->pages[ctx->offset >> PAGE_SHIFT];
321 page_offset = ctx->offset % PAGE_SIZE;
322 element = &ctx->elements[ctx->num_elements];
323 while (data_len){
324 page_remainder = PAGE_SIZE - page_offset;
325 if (page_remainder < data_len){
326 qeth_eddp_copy_data_tcp(page + page_offset, eddp,
327 page_remainder, &hcsum);
328 element->length += page_remainder;
329 if (first_lap)
330 element->flags = SBAL_FLAGS_FIRST_FRAG;
331 else
332 element->flags = SBAL_FLAGS_MIDDLE_FRAG;
333 ctx->num_elements++;
334 element++;
335 data_len -= page_remainder;
336 ctx->offset += page_remainder;
337 page = ctx->pages[ctx->offset >> PAGE_SHIFT];
338 page_offset = 0;
339 element->addr = page + page_offset;
340 } else {
341 qeth_eddp_copy_data_tcp(page + page_offset, eddp,
342 data_len, &hcsum);
343 element->length += data_len;
344 if (!first_lap)
345 element->flags = SBAL_FLAGS_LAST_FRAG;
346 ctx->num_elements++;
347 ctx->offset += data_len;
348 data_len = 0;
349 }
350 first_lap = 0;
351 }
352 ((struct tcphdr *)eddp->th_in_ctx)->check = csum_fold(hcsum);
353}
354
355static __wsum
356qeth_eddp_check_tcp4_hdr(struct qeth_eddp_data *eddp, int data_len)
357{
358 __wsum phcsum; /* pseudo header checksum */
359
360 QETH_DBF_TEXT(trace, 5, "eddpckt4");
361 eddp->th.tcp.h.check = 0;
362 /* compute pseudo header checksum */
363 phcsum = csum_tcpudp_nofold(eddp->nh.ip4.h.saddr, eddp->nh.ip4.h.daddr,
364 eddp->thl + data_len, IPPROTO_TCP, 0);
365 /* compute checksum of tcp header */
366 return csum_partial((u8 *)&eddp->th, eddp->thl, phcsum);
367}
368
369static __wsum
370qeth_eddp_check_tcp6_hdr(struct qeth_eddp_data *eddp, int data_len)
371{
372 __be32 proto;
373 __wsum phcsum; /* pseudo header checksum */
374
375 QETH_DBF_TEXT(trace, 5, "eddpckt6");
376 eddp->th.tcp.h.check = 0;
377 /* compute pseudo header checksum */
378 phcsum = csum_partial((u8 *)&eddp->nh.ip6.h.saddr,
379 sizeof(struct in6_addr), 0);
380 phcsum = csum_partial((u8 *)&eddp->nh.ip6.h.daddr,
381 sizeof(struct in6_addr), phcsum);
382 proto = htonl(IPPROTO_TCP);
383 phcsum = csum_partial((u8 *)&proto, sizeof(u32), phcsum);
384 return phcsum;
385}
386
387static struct qeth_eddp_data *
388qeth_eddp_create_eddp_data(struct qeth_hdr *qh, u8 *nh, u8 nhl, u8 *th, u8 thl)
389{
390 struct qeth_eddp_data *eddp;
391
392 QETH_DBF_TEXT(trace, 5, "eddpcrda");
393 eddp = kzalloc(sizeof(struct qeth_eddp_data), GFP_ATOMIC);
394 if (eddp){
395 eddp->nhl = nhl;
396 eddp->thl = thl;
397 memcpy(&eddp->qh, qh, sizeof(struct qeth_hdr));
398 memcpy(&eddp->nh, nh, nhl);
399 memcpy(&eddp->th, th, thl);
400 eddp->frag = -1; /* initially we're in skb->data */
401 }
402 return eddp;
403}
404
405static void
406__qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx,
407 struct qeth_eddp_data *eddp)
408{
409 struct tcphdr *tcph;
410 int data_len;
411 __wsum hcsum;
412
413 QETH_DBF_TEXT(trace, 5, "eddpftcp");
414 eddp->skb_offset = sizeof(struct qeth_hdr) + eddp->nhl + eddp->thl;
415 if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
416 eddp->skb_offset += sizeof(struct ethhdr);
417#ifdef CONFIG_QETH_VLAN
418 if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q))
419 eddp->skb_offset += VLAN_HLEN;
420#endif /* CONFIG_QETH_VLAN */
421 }
422 tcph = tcp_hdr(eddp->skb);
423 while (eddp->skb_offset < eddp->skb->len) {
424 data_len = min((int)skb_shinfo(eddp->skb)->gso_size,
425 (int)(eddp->skb->len - eddp->skb_offset));
426 /* prepare qdio hdr */
427 if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2){
428 eddp->qh.hdr.l2.pkt_length = data_len + ETH_HLEN +
429 eddp->nhl + eddp->thl;
430#ifdef CONFIG_QETH_VLAN
431 if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q))
432 eddp->qh.hdr.l2.pkt_length += VLAN_HLEN;
433#endif /* CONFIG_QETH_VLAN */
434 } else
435 eddp->qh.hdr.l3.length = data_len + eddp->nhl +
436 eddp->thl;
437 /* prepare ip hdr */
438 if (eddp->skb->protocol == htons(ETH_P_IP)){
439 eddp->nh.ip4.h.tot_len = htons(data_len + eddp->nhl +
440 eddp->thl);
441 eddp->nh.ip4.h.check = 0;
442 eddp->nh.ip4.h.check =
443 ip_fast_csum((u8 *)&eddp->nh.ip4.h,
444 eddp->nh.ip4.h.ihl);
445 } else
446 eddp->nh.ip6.h.payload_len = htons(data_len + eddp->thl);
447 /* prepare tcp hdr */
448 if (data_len == (eddp->skb->len - eddp->skb_offset)){
449 /* last segment -> set FIN and PSH flags */
450 eddp->th.tcp.h.fin = tcph->fin;
451 eddp->th.tcp.h.psh = tcph->psh;
452 }
453 if (eddp->skb->protocol == htons(ETH_P_IP))
454 hcsum = qeth_eddp_check_tcp4_hdr(eddp, data_len);
455 else
456 hcsum = qeth_eddp_check_tcp6_hdr(eddp, data_len);
457 /* fill the next segment into the context */
458 qeth_eddp_create_segment_hdrs(ctx, eddp, data_len);
459 qeth_eddp_create_segment_data_tcp(ctx, eddp, data_len, hcsum);
460 if (eddp->skb_offset >= eddp->skb->len)
461 break;
462 /* prepare headers for next round */
463 if (eddp->skb->protocol == htons(ETH_P_IP))
464 eddp->nh.ip4.h.id = htons(ntohs(eddp->nh.ip4.h.id) + 1);
465 eddp->th.tcp.h.seq = htonl(ntohl(eddp->th.tcp.h.seq) + data_len);
466 }
467}
468
469static int
470qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx,
471 struct sk_buff *skb, struct qeth_hdr *qhdr)
472{
473 struct qeth_eddp_data *eddp = NULL;
474
475 QETH_DBF_TEXT(trace, 5, "eddpficx");
476 /* create our segmentation headers and copy original headers */
477 if (skb->protocol == htons(ETH_P_IP))
478 eddp = qeth_eddp_create_eddp_data(qhdr,
479 skb_network_header(skb),
480 ip_hdrlen(skb),
481 skb_transport_header(skb),
482 tcp_hdrlen(skb));
483 else
484 eddp = qeth_eddp_create_eddp_data(qhdr,
485 skb_network_header(skb),
486 sizeof(struct ipv6hdr),
487 skb_transport_header(skb),
488 tcp_hdrlen(skb));
489
490 if (eddp == NULL) {
491 QETH_DBF_TEXT(trace, 2, "eddpfcnm");
492 return -ENOMEM;
493 }
494 if (qhdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
495 skb_set_mac_header(skb, sizeof(struct qeth_hdr));
496 memcpy(&eddp->mac, eth_hdr(skb), ETH_HLEN);
497#ifdef CONFIG_QETH_VLAN
498 if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q)) {
499 eddp->vlan[0] = skb->protocol;
500 eddp->vlan[1] = htons(vlan_tx_tag_get(skb));
501 }
502#endif /* CONFIG_QETH_VLAN */
503 }
504 /* the next flags will only be set on the last segment */
505 eddp->th.tcp.h.fin = 0;
506 eddp->th.tcp.h.psh = 0;
507 eddp->skb = skb;
508 /* begin segmentation and fill context */
509 __qeth_eddp_fill_context_tcp(ctx, eddp);
510 kfree(eddp);
511 return 0;
512}
513
514static void
515qeth_eddp_calc_num_pages(struct qeth_eddp_context *ctx, struct sk_buff *skb,
516 int hdr_len)
517{
518 int skbs_per_page;
519
520 QETH_DBF_TEXT(trace, 5, "eddpcanp");
521 /* can we put multiple skbs in one page? */
522 skbs_per_page = PAGE_SIZE / (skb_shinfo(skb)->gso_size + hdr_len);
523 if (skbs_per_page > 1){
524 ctx->num_pages = (skb_shinfo(skb)->gso_segs + 1) /
525 skbs_per_page + 1;
526 ctx->elements_per_skb = 1;
527 } else {
528 /* no -> how many elements per skb? */
529 ctx->elements_per_skb = (skb_shinfo(skb)->gso_size + hdr_len +
530 PAGE_SIZE) >> PAGE_SHIFT;
531 ctx->num_pages = ctx->elements_per_skb *
532 (skb_shinfo(skb)->gso_segs + 1);
533 }
534 ctx->num_elements = ctx->elements_per_skb *
535 (skb_shinfo(skb)->gso_segs + 1);
536}
537
538static struct qeth_eddp_context *
539qeth_eddp_create_context_generic(struct qeth_card *card, struct sk_buff *skb,
540 int hdr_len)
541{
542 struct qeth_eddp_context *ctx = NULL;
543 u8 *addr;
544 int i;
545
546 QETH_DBF_TEXT(trace, 5, "creddpcg");
547 /* create the context and allocate pages */
548 ctx = kzalloc(sizeof(struct qeth_eddp_context), GFP_ATOMIC);
549 if (ctx == NULL){
550 QETH_DBF_TEXT(trace, 2, "ceddpcn1");
551 return NULL;
552 }
553 ctx->type = QETH_LARGE_SEND_EDDP;
554 qeth_eddp_calc_num_pages(ctx, skb, hdr_len);
555 if (ctx->elements_per_skb > QETH_MAX_BUFFER_ELEMENTS(card)){
556 QETH_DBF_TEXT(trace, 2, "ceddpcis");
557 kfree(ctx);
558 return NULL;
559 }
560 ctx->pages = kcalloc(ctx->num_pages, sizeof(u8 *), GFP_ATOMIC);
561 if (ctx->pages == NULL){
562 QETH_DBF_TEXT(trace, 2, "ceddpcn2");
563 kfree(ctx);
564 return NULL;
565 }
566 for (i = 0; i < ctx->num_pages; ++i){
567 addr = (u8 *)__get_free_page(GFP_ATOMIC);
568 if (addr == NULL){
569 QETH_DBF_TEXT(trace, 2, "ceddpcn3");
570 ctx->num_pages = i;
571 qeth_eddp_free_context(ctx);
572 return NULL;
573 }
574 memset(addr, 0, PAGE_SIZE);
575 ctx->pages[i] = addr;
576 }
577 ctx->elements = kcalloc(ctx->num_elements,
578 sizeof(struct qeth_eddp_element), GFP_ATOMIC);
579 if (ctx->elements == NULL){
580 QETH_DBF_TEXT(trace, 2, "ceddpcn4");
581 qeth_eddp_free_context(ctx);
582 return NULL;
583 }
584 /* reset num_elements; will be incremented again in fill_buffer to
585 * reflect number of actually used elements */
586 ctx->num_elements = 0;
587 return ctx;
588}
589
590static struct qeth_eddp_context *
591qeth_eddp_create_context_tcp(struct qeth_card *card, struct sk_buff *skb,
592 struct qeth_hdr *qhdr)
593{
594 struct qeth_eddp_context *ctx = NULL;
595
596 QETH_DBF_TEXT(trace, 5, "creddpct");
597 if (skb->protocol == htons(ETH_P_IP))
598 ctx = qeth_eddp_create_context_generic(card, skb,
599 (sizeof(struct qeth_hdr) +
600 ip_hdrlen(skb) +
601 tcp_hdrlen(skb)));
602 else if (skb->protocol == htons(ETH_P_IPV6))
603 ctx = qeth_eddp_create_context_generic(card, skb,
604 sizeof(struct qeth_hdr) + sizeof(struct ipv6hdr) +
605 tcp_hdrlen(skb));
606 else
607 QETH_DBF_TEXT(trace, 2, "cetcpinv");
608
609 if (ctx == NULL) {
610 QETH_DBF_TEXT(trace, 2, "creddpnl");
611 return NULL;
612 }
613 if (qeth_eddp_fill_context_tcp(ctx, skb, qhdr)){
614 QETH_DBF_TEXT(trace, 2, "ceddptfe");
615 qeth_eddp_free_context(ctx);
616 return NULL;
617 }
618 atomic_set(&ctx->refcnt, 1);
619 return ctx;
620}
621
622struct qeth_eddp_context *
623qeth_eddp_create_context(struct qeth_card *card, struct sk_buff *skb,
624 struct qeth_hdr *qhdr, unsigned char sk_protocol)
625{
626 QETH_DBF_TEXT(trace, 5, "creddpc");
627 switch (sk_protocol) {
628 case IPPROTO_TCP:
629 return qeth_eddp_create_context_tcp(card, skb, qhdr);
630 default:
631 QETH_DBF_TEXT(trace, 2, "eddpinvp");
632 }
633 return NULL;
634}
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-10 13:10:42 -0400