diff options
author | David S. Miller <davem@davemloft.net> | 2008-03-22 21:22:42 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2008-03-22 21:22:42 -0400 |
commit | 76fef2b6bffa13ad7ccd54c0493b053295721b9a (patch) | |
tree | f4509477d413398b7155fb3c35453ab26bd81bce /drivers/s390/net/qeth_core_offl.c | |
parent | 817bc4db7794d6dc6594265ddea88d2b839cf2f8 (diff) | |
parent | ef8500457b29eed13d03ff19af36d810308e57b7 (diff) |
Merge branch 'upstream-net26' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
Conflicts:
drivers/s390/net/qeth_main.c
Diffstat (limited to 'drivers/s390/net/qeth_core_offl.c')
-rw-r--r-- | drivers/s390/net/qeth_core_offl.c | 701 |
1 files changed, 701 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_core_offl.c b/drivers/s390/net/qeth_core_offl.c new file mode 100644 index 00000000000..8b407d6a83c --- /dev/null +++ b/drivers/s390/net/qeth_core_offl.c | |||
@@ -0,0 +1,701 @@ | |||
1 | /* | ||
2 | * drivers/s390/net/qeth_core_offl.c | ||
3 | * | ||
4 | * Copyright IBM Corp. 2007 | ||
5 | * Author(s): Thomas Spatzier <tspat@de.ibm.com>, | ||
6 | * Frank Blaschka <frank.blaschka@de.ibm.com> | ||
7 | */ | ||
8 | |||
9 | #include <linux/errno.h> | ||
10 | #include <linux/ip.h> | ||
11 | #include <linux/inetdevice.h> | ||
12 | #include <linux/netdevice.h> | ||
13 | #include <linux/kernel.h> | ||
14 | #include <linux/tcp.h> | ||
15 | #include <net/tcp.h> | ||
16 | #include <linux/skbuff.h> | ||
17 | |||
18 | #include <net/ip.h> | ||
19 | #include <net/ip6_checksum.h> | ||
20 | |||
21 | #include "qeth_core.h" | ||
22 | #include "qeth_core_mpc.h" | ||
23 | #include "qeth_core_offl.h" | ||
24 | |||
25 | int qeth_eddp_check_buffers_for_context(struct qeth_qdio_out_q *queue, | ||
26 | struct qeth_eddp_context *ctx) | ||
27 | { | ||
28 | int index = queue->next_buf_to_fill; | ||
29 | int elements_needed = ctx->num_elements; | ||
30 | int elements_in_buffer; | ||
31 | int skbs_in_buffer; | ||
32 | int buffers_needed = 0; | ||
33 | |||
34 | QETH_DBF_TEXT(trace, 5, "eddpcbfc"); | ||
35 | while (elements_needed > 0) { | ||
36 | buffers_needed++; | ||
37 | if (atomic_read(&queue->bufs[index].state) != | ||
38 | QETH_QDIO_BUF_EMPTY) | ||
39 | return -EBUSY; | ||
40 | |||
41 | elements_in_buffer = QETH_MAX_BUFFER_ELEMENTS(queue->card) - | ||
42 | queue->bufs[index].next_element_to_fill; | ||
43 | skbs_in_buffer = elements_in_buffer / ctx->elements_per_skb; | ||
44 | elements_needed -= skbs_in_buffer * ctx->elements_per_skb; | ||
45 | index = (index + 1) % QDIO_MAX_BUFFERS_PER_Q; | ||
46 | } | ||
47 | return buffers_needed; | ||
48 | } | ||
49 | |||
50 | static void qeth_eddp_free_context(struct qeth_eddp_context *ctx) | ||
51 | { | ||
52 | int i; | ||
53 | |||
54 | QETH_DBF_TEXT(trace, 5, "eddpfctx"); | ||
55 | for (i = 0; i < ctx->num_pages; ++i) | ||
56 | free_page((unsigned long)ctx->pages[i]); | ||
57 | kfree(ctx->pages); | ||
58 | kfree(ctx->elements); | ||
59 | kfree(ctx); | ||
60 | } | ||
61 | |||
62 | |||
63 | static void qeth_eddp_get_context(struct qeth_eddp_context *ctx) | ||
64 | { | ||
65 | atomic_inc(&ctx->refcnt); | ||
66 | } | ||
67 | |||
68 | void qeth_eddp_put_context(struct qeth_eddp_context *ctx) | ||
69 | { | ||
70 | if (atomic_dec_return(&ctx->refcnt) == 0) | ||
71 | qeth_eddp_free_context(ctx); | ||
72 | } | ||
73 | EXPORT_SYMBOL_GPL(qeth_eddp_put_context); | ||
74 | |||
75 | void qeth_eddp_buf_release_contexts(struct qeth_qdio_out_buffer *buf) | ||
76 | { | ||
77 | struct qeth_eddp_context_reference *ref; | ||
78 | |||
79 | QETH_DBF_TEXT(trace, 6, "eddprctx"); | ||
80 | while (!list_empty(&buf->ctx_list)) { | ||
81 | ref = list_entry(buf->ctx_list.next, | ||
82 | struct qeth_eddp_context_reference, list); | ||
83 | qeth_eddp_put_context(ref->ctx); | ||
84 | list_del(&ref->list); | ||
85 | kfree(ref); | ||
86 | } | ||
87 | } | ||
88 | |||
89 | static int qeth_eddp_buf_ref_context(struct qeth_qdio_out_buffer *buf, | ||
90 | struct qeth_eddp_context *ctx) | ||
91 | { | ||
92 | struct qeth_eddp_context_reference *ref; | ||
93 | |||
94 | QETH_DBF_TEXT(trace, 6, "eddprfcx"); | ||
95 | ref = kmalloc(sizeof(struct qeth_eddp_context_reference), GFP_ATOMIC); | ||
96 | if (ref == NULL) | ||
97 | return -ENOMEM; | ||
98 | qeth_eddp_get_context(ctx); | ||
99 | ref->ctx = ctx; | ||
100 | list_add_tail(&ref->list, &buf->ctx_list); | ||
101 | return 0; | ||
102 | } | ||
103 | |||
104 | int qeth_eddp_fill_buffer(struct qeth_qdio_out_q *queue, | ||
105 | struct qeth_eddp_context *ctx, int index) | ||
106 | { | ||
107 | struct qeth_qdio_out_buffer *buf = NULL; | ||
108 | struct qdio_buffer *buffer; | ||
109 | int elements = ctx->num_elements; | ||
110 | int element = 0; | ||
111 | int flush_cnt = 0; | ||
112 | int must_refcnt = 1; | ||
113 | int i; | ||
114 | |||
115 | QETH_DBF_TEXT(trace, 5, "eddpfibu"); | ||
116 | while (elements > 0) { | ||
117 | buf = &queue->bufs[index]; | ||
118 | if (atomic_read(&buf->state) != QETH_QDIO_BUF_EMPTY) { | ||
119 | /* normally this should not happen since we checked for | ||
120 | * available elements in qeth_check_elements_for_context | ||
121 | */ | ||
122 | if (element == 0) | ||
123 | return -EBUSY; | ||
124 | else { | ||
125 | PRINT_WARN("could only partially fill eddp " | ||
126 | "buffer!\n"); | ||
127 | goto out; | ||
128 | } | ||
129 | } | ||
130 | /* check if the whole next skb fits into current buffer */ | ||
131 | if ((QETH_MAX_BUFFER_ELEMENTS(queue->card) - | ||
132 | buf->next_element_to_fill) | ||
133 | < ctx->elements_per_skb){ | ||
134 | /* no -> go to next buffer */ | ||
135 | atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED); | ||
136 | index = (index + 1) % QDIO_MAX_BUFFERS_PER_Q; | ||
137 | flush_cnt++; | ||
138 | /* new buffer, so we have to add ctx to buffer'ctx_list | ||
139 | * and increment ctx's refcnt */ | ||
140 | must_refcnt = 1; | ||
141 | continue; | ||
142 | } | ||
143 | if (must_refcnt) { | ||
144 | must_refcnt = 0; | ||
145 | if (qeth_eddp_buf_ref_context(buf, ctx)) { | ||
146 | PRINT_WARN("no memory to create eddp context " | ||
147 | "reference\n"); | ||
148 | goto out_check; | ||
149 | } | ||
150 | } | ||
151 | buffer = buf->buffer; | ||
152 | /* fill one skb into buffer */ | ||
153 | for (i = 0; i < ctx->elements_per_skb; ++i) { | ||
154 | if (ctx->elements[element].length != 0) { | ||
155 | buffer->element[buf->next_element_to_fill]. | ||
156 | addr = ctx->elements[element].addr; | ||
157 | buffer->element[buf->next_element_to_fill]. | ||
158 | length = ctx->elements[element].length; | ||
159 | buffer->element[buf->next_element_to_fill]. | ||
160 | flags = ctx->elements[element].flags; | ||
161 | buf->next_element_to_fill++; | ||
162 | } | ||
163 | element++; | ||
164 | elements--; | ||
165 | } | ||
166 | } | ||
167 | out_check: | ||
168 | if (!queue->do_pack) { | ||
169 | QETH_DBF_TEXT(trace, 6, "fillbfnp"); | ||
170 | /* set state to PRIMED -> will be flushed */ | ||
171 | if (buf->next_element_to_fill > 0) { | ||
172 | atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED); | ||
173 | flush_cnt++; | ||
174 | } | ||
175 | } else { | ||
176 | if (queue->card->options.performance_stats) | ||
177 | queue->card->perf_stats.skbs_sent_pack++; | ||
178 | QETH_DBF_TEXT(trace, 6, "fillbfpa"); | ||
179 | if (buf->next_element_to_fill >= | ||
180 | QETH_MAX_BUFFER_ELEMENTS(queue->card)) { | ||
181 | /* | ||
182 | * packed buffer if full -> set state PRIMED | ||
183 | * -> will be flushed | ||
184 | */ | ||
185 | atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED); | ||
186 | flush_cnt++; | ||
187 | } | ||
188 | } | ||
189 | out: | ||
190 | return flush_cnt; | ||
191 | } | ||
192 | |||
193 | static void qeth_eddp_create_segment_hdrs(struct qeth_eddp_context *ctx, | ||
194 | struct qeth_eddp_data *eddp, int data_len) | ||
195 | { | ||
196 | u8 *page; | ||
197 | int page_remainder; | ||
198 | int page_offset; | ||
199 | int pkt_len; | ||
200 | struct qeth_eddp_element *element; | ||
201 | |||
202 | QETH_DBF_TEXT(trace, 5, "eddpcrsh"); | ||
203 | page = ctx->pages[ctx->offset >> PAGE_SHIFT]; | ||
204 | page_offset = ctx->offset % PAGE_SIZE; | ||
205 | element = &ctx->elements[ctx->num_elements]; | ||
206 | pkt_len = eddp->nhl + eddp->thl + data_len; | ||
207 | /* FIXME: layer2 and VLAN !!! */ | ||
208 | if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2) | ||
209 | pkt_len += ETH_HLEN; | ||
210 | if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q)) | ||
211 | pkt_len += VLAN_HLEN; | ||
212 | /* does complete packet fit in current page ? */ | ||
213 | page_remainder = PAGE_SIZE - page_offset; | ||
214 | if (page_remainder < (sizeof(struct qeth_hdr) + pkt_len)) { | ||
215 | /* no -> go to start of next page */ | ||
216 | ctx->offset += page_remainder; | ||
217 | page = ctx->pages[ctx->offset >> PAGE_SHIFT]; | ||
218 | page_offset = 0; | ||
219 | } | ||
220 | memcpy(page + page_offset, &eddp->qh, sizeof(struct qeth_hdr)); | ||
221 | element->addr = page + page_offset; | ||
222 | element->length = sizeof(struct qeth_hdr); | ||
223 | ctx->offset += sizeof(struct qeth_hdr); | ||
224 | page_offset += sizeof(struct qeth_hdr); | ||
225 | /* add mac header (?) */ | ||
226 | if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2) { | ||
227 | memcpy(page + page_offset, &eddp->mac, ETH_HLEN); | ||
228 | element->length += ETH_HLEN; | ||
229 | ctx->offset += ETH_HLEN; | ||
230 | page_offset += ETH_HLEN; | ||
231 | } | ||
232 | /* add VLAN tag */ | ||
233 | if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q)) { | ||
234 | memcpy(page + page_offset, &eddp->vlan, VLAN_HLEN); | ||
235 | element->length += VLAN_HLEN; | ||
236 | ctx->offset += VLAN_HLEN; | ||
237 | page_offset += VLAN_HLEN; | ||
238 | } | ||
239 | /* add network header */ | ||
240 | memcpy(page + page_offset, (u8 *)&eddp->nh, eddp->nhl); | ||
241 | element->length += eddp->nhl; | ||
242 | eddp->nh_in_ctx = page + page_offset; | ||
243 | ctx->offset += eddp->nhl; | ||
244 | page_offset += eddp->nhl; | ||
245 | /* add transport header */ | ||
246 | memcpy(page + page_offset, (u8 *)&eddp->th, eddp->thl); | ||
247 | element->length += eddp->thl; | ||
248 | eddp->th_in_ctx = page + page_offset; | ||
249 | ctx->offset += eddp->thl; | ||
250 | } | ||
251 | |||
252 | static void qeth_eddp_copy_data_tcp(char *dst, struct qeth_eddp_data *eddp, | ||
253 | int len, __wsum *hcsum) | ||
254 | { | ||
255 | struct skb_frag_struct *frag; | ||
256 | int left_in_frag; | ||
257 | int copy_len; | ||
258 | u8 *src; | ||
259 | |||
260 | QETH_DBF_TEXT(trace, 5, "eddpcdtc"); | ||
261 | if (skb_shinfo(eddp->skb)->nr_frags == 0) { | ||
262 | skb_copy_from_linear_data_offset(eddp->skb, eddp->skb_offset, | ||
263 | dst, len); | ||
264 | *hcsum = csum_partial(eddp->skb->data + eddp->skb_offset, len, | ||
265 | *hcsum); | ||
266 | eddp->skb_offset += len; | ||
267 | } else { | ||
268 | while (len > 0) { | ||
269 | if (eddp->frag < 0) { | ||
270 | /* we're in skb->data */ | ||
271 | left_in_frag = (eddp->skb->len - | ||
272 | eddp->skb->data_len) | ||
273 | - eddp->skb_offset; | ||
274 | src = eddp->skb->data + eddp->skb_offset; | ||
275 | } else { | ||
276 | frag = &skb_shinfo(eddp->skb)->frags[ | ||
277 | eddp->frag]; | ||
278 | left_in_frag = frag->size - eddp->frag_offset; | ||
279 | src = (u8 *)((page_to_pfn(frag->page) << | ||
280 | PAGE_SHIFT) + frag->page_offset + | ||
281 | eddp->frag_offset); | ||
282 | } | ||
283 | if (left_in_frag <= 0) { | ||
284 | eddp->frag++; | ||
285 | eddp->frag_offset = 0; | ||
286 | continue; | ||
287 | } | ||
288 | copy_len = min(left_in_frag, len); | ||
289 | memcpy(dst, src, copy_len); | ||
290 | *hcsum = csum_partial(src, copy_len, *hcsum); | ||
291 | dst += copy_len; | ||
292 | eddp->frag_offset += copy_len; | ||
293 | eddp->skb_offset += copy_len; | ||
294 | len -= copy_len; | ||
295 | } | ||
296 | } | ||
297 | } | ||
298 | |||
299 | static void qeth_eddp_create_segment_data_tcp(struct qeth_eddp_context *ctx, | ||
300 | struct qeth_eddp_data *eddp, int data_len, __wsum hcsum) | ||
301 | { | ||
302 | u8 *page; | ||
303 | int page_remainder; | ||
304 | int page_offset; | ||
305 | struct qeth_eddp_element *element; | ||
306 | int first_lap = 1; | ||
307 | |||
308 | QETH_DBF_TEXT(trace, 5, "eddpcsdt"); | ||
309 | page = ctx->pages[ctx->offset >> PAGE_SHIFT]; | ||
310 | page_offset = ctx->offset % PAGE_SIZE; | ||
311 | element = &ctx->elements[ctx->num_elements]; | ||
312 | while (data_len) { | ||
313 | page_remainder = PAGE_SIZE - page_offset; | ||
314 | if (page_remainder < data_len) { | ||
315 | qeth_eddp_copy_data_tcp(page + page_offset, eddp, | ||
316 | page_remainder, &hcsum); | ||
317 | element->length += page_remainder; | ||
318 | if (first_lap) | ||
319 | element->flags = SBAL_FLAGS_FIRST_FRAG; | ||
320 | else | ||
321 | element->flags = SBAL_FLAGS_MIDDLE_FRAG; | ||
322 | ctx->num_elements++; | ||
323 | element++; | ||
324 | data_len -= page_remainder; | ||
325 | ctx->offset += page_remainder; | ||
326 | page = ctx->pages[ctx->offset >> PAGE_SHIFT]; | ||
327 | page_offset = 0; | ||
328 | element->addr = page + page_offset; | ||
329 | } else { | ||
330 | qeth_eddp_copy_data_tcp(page + page_offset, eddp, | ||
331 | data_len, &hcsum); | ||
332 | element->length += data_len; | ||
333 | if (!first_lap) | ||
334 | element->flags = SBAL_FLAGS_LAST_FRAG; | ||
335 | ctx->num_elements++; | ||
336 | ctx->offset += data_len; | ||
337 | data_len = 0; | ||
338 | } | ||
339 | first_lap = 0; | ||
340 | } | ||
341 | ((struct tcphdr *)eddp->th_in_ctx)->check = csum_fold(hcsum); | ||
342 | } | ||
343 | |||
344 | static __wsum qeth_eddp_check_tcp4_hdr(struct qeth_eddp_data *eddp, | ||
345 | int data_len) | ||
346 | { | ||
347 | __wsum phcsum; /* pseudo header checksum */ | ||
348 | |||
349 | QETH_DBF_TEXT(trace, 5, "eddpckt4"); | ||
350 | eddp->th.tcp.h.check = 0; | ||
351 | /* compute pseudo header checksum */ | ||
352 | phcsum = csum_tcpudp_nofold(eddp->nh.ip4.h.saddr, eddp->nh.ip4.h.daddr, | ||
353 | eddp->thl + data_len, IPPROTO_TCP, 0); | ||
354 | /* compute checksum of tcp header */ | ||
355 | return csum_partial((u8 *)&eddp->th, eddp->thl, phcsum); | ||
356 | } | ||
357 | |||
358 | static __wsum qeth_eddp_check_tcp6_hdr(struct qeth_eddp_data *eddp, | ||
359 | int data_len) | ||
360 | { | ||
361 | __be32 proto; | ||
362 | __wsum phcsum; /* pseudo header checksum */ | ||
363 | |||
364 | QETH_DBF_TEXT(trace, 5, "eddpckt6"); | ||
365 | eddp->th.tcp.h.check = 0; | ||
366 | /* compute pseudo header checksum */ | ||
367 | phcsum = csum_partial((u8 *)&eddp->nh.ip6.h.saddr, | ||
368 | sizeof(struct in6_addr), 0); | ||
369 | phcsum = csum_partial((u8 *)&eddp->nh.ip6.h.daddr, | ||
370 | sizeof(struct in6_addr), phcsum); | ||
371 | proto = htonl(IPPROTO_TCP); | ||
372 | phcsum = csum_partial((u8 *)&proto, sizeof(u32), phcsum); | ||
373 | return phcsum; | ||
374 | } | ||
375 | |||
376 | static struct qeth_eddp_data *qeth_eddp_create_eddp_data(struct qeth_hdr *qh, | ||
377 | u8 *nh, u8 nhl, u8 *th, u8 thl) | ||
378 | { | ||
379 | struct qeth_eddp_data *eddp; | ||
380 | |||
381 | QETH_DBF_TEXT(trace, 5, "eddpcrda"); | ||
382 | eddp = kzalloc(sizeof(struct qeth_eddp_data), GFP_ATOMIC); | ||
383 | if (eddp) { | ||
384 | eddp->nhl = nhl; | ||
385 | eddp->thl = thl; | ||
386 | memcpy(&eddp->qh, qh, sizeof(struct qeth_hdr)); | ||
387 | memcpy(&eddp->nh, nh, nhl); | ||
388 | memcpy(&eddp->th, th, thl); | ||
389 | eddp->frag = -1; /* initially we're in skb->data */ | ||
390 | } | ||
391 | return eddp; | ||
392 | } | ||
393 | |||
394 | static void __qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx, | ||
395 | struct qeth_eddp_data *eddp) | ||
396 | { | ||
397 | struct tcphdr *tcph; | ||
398 | int data_len; | ||
399 | __wsum hcsum; | ||
400 | |||
401 | QETH_DBF_TEXT(trace, 5, "eddpftcp"); | ||
402 | eddp->skb_offset = sizeof(struct qeth_hdr) + eddp->nhl + eddp->thl; | ||
403 | if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2) { | ||
404 | eddp->skb_offset += sizeof(struct ethhdr); | ||
405 | if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q)) | ||
406 | eddp->skb_offset += VLAN_HLEN; | ||
407 | } | ||
408 | tcph = tcp_hdr(eddp->skb); | ||
409 | while (eddp->skb_offset < eddp->skb->len) { | ||
410 | data_len = min((int)skb_shinfo(eddp->skb)->gso_size, | ||
411 | (int)(eddp->skb->len - eddp->skb_offset)); | ||
412 | /* prepare qdio hdr */ | ||
413 | if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2) { | ||
414 | eddp->qh.hdr.l2.pkt_length = data_len + ETH_HLEN + | ||
415 | eddp->nhl + eddp->thl; | ||
416 | if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q)) | ||
417 | eddp->qh.hdr.l2.pkt_length += VLAN_HLEN; | ||
418 | } else | ||
419 | eddp->qh.hdr.l3.length = data_len + eddp->nhl + | ||
420 | eddp->thl; | ||
421 | /* prepare ip hdr */ | ||
422 | if (eddp->skb->protocol == htons(ETH_P_IP)) { | ||
423 | eddp->nh.ip4.h.tot_len = htons(data_len + eddp->nhl + | ||
424 | eddp->thl); | ||
425 | eddp->nh.ip4.h.check = 0; | ||
426 | eddp->nh.ip4.h.check = | ||
427 | ip_fast_csum((u8 *)&eddp->nh.ip4.h, | ||
428 | eddp->nh.ip4.h.ihl); | ||
429 | } else | ||
430 | eddp->nh.ip6.h.payload_len = htons(data_len + | ||
431 | eddp->thl); | ||
432 | /* prepare tcp hdr */ | ||
433 | if (data_len == (eddp->skb->len - eddp->skb_offset)) { | ||
434 | /* last segment -> set FIN and PSH flags */ | ||
435 | eddp->th.tcp.h.fin = tcph->fin; | ||
436 | eddp->th.tcp.h.psh = tcph->psh; | ||
437 | } | ||
438 | if (eddp->skb->protocol == htons(ETH_P_IP)) | ||
439 | hcsum = qeth_eddp_check_tcp4_hdr(eddp, data_len); | ||
440 | else | ||
441 | hcsum = qeth_eddp_check_tcp6_hdr(eddp, data_len); | ||
442 | /* fill the next segment into the context */ | ||
443 | qeth_eddp_create_segment_hdrs(ctx, eddp, data_len); | ||
444 | qeth_eddp_create_segment_data_tcp(ctx, eddp, data_len, hcsum); | ||
445 | if (eddp->skb_offset >= eddp->skb->len) | ||
446 | break; | ||
447 | /* prepare headers for next round */ | ||
448 | if (eddp->skb->protocol == htons(ETH_P_IP)) | ||
449 | eddp->nh.ip4.h.id = htons(ntohs(eddp->nh.ip4.h.id) + 1); | ||
450 | eddp->th.tcp.h.seq = htonl(ntohl(eddp->th.tcp.h.seq) + | ||
451 | data_len); | ||
452 | } | ||
453 | } | ||
454 | |||
455 | static int qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx, | ||
456 | struct sk_buff *skb, struct qeth_hdr *qhdr) | ||
457 | { | ||
458 | struct qeth_eddp_data *eddp = NULL; | ||
459 | |||
460 | QETH_DBF_TEXT(trace, 5, "eddpficx"); | ||
461 | /* create our segmentation headers and copy original headers */ | ||
462 | if (skb->protocol == htons(ETH_P_IP)) | ||
463 | eddp = qeth_eddp_create_eddp_data(qhdr, | ||
464 | skb_network_header(skb), | ||
465 | ip_hdrlen(skb), | ||
466 | skb_transport_header(skb), | ||
467 | tcp_hdrlen(skb)); | ||
468 | else | ||
469 | eddp = qeth_eddp_create_eddp_data(qhdr, | ||
470 | skb_network_header(skb), | ||
471 | sizeof(struct ipv6hdr), | ||
472 | skb_transport_header(skb), | ||
473 | tcp_hdrlen(skb)); | ||
474 | |||
475 | if (eddp == NULL) { | ||
476 | QETH_DBF_TEXT(trace, 2, "eddpfcnm"); | ||
477 | return -ENOMEM; | ||
478 | } | ||
479 | if (qhdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) { | ||
480 | skb_set_mac_header(skb, sizeof(struct qeth_hdr)); | ||
481 | memcpy(&eddp->mac, eth_hdr(skb), ETH_HLEN); | ||
482 | if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q)) { | ||
483 | eddp->vlan[0] = skb->protocol; | ||
484 | eddp->vlan[1] = htons(vlan_tx_tag_get(skb)); | ||
485 | } | ||
486 | } | ||
487 | /* the next flags will only be set on the last segment */ | ||
488 | eddp->th.tcp.h.fin = 0; | ||
489 | eddp->th.tcp.h.psh = 0; | ||
490 | eddp->skb = skb; | ||
491 | /* begin segmentation and fill context */ | ||
492 | __qeth_eddp_fill_context_tcp(ctx, eddp); | ||
493 | kfree(eddp); | ||
494 | return 0; | ||
495 | } | ||
496 | |||
497 | static void qeth_eddp_calc_num_pages(struct qeth_eddp_context *ctx, | ||
498 | struct sk_buff *skb, int hdr_len) | ||
499 | { | ||
500 | int skbs_per_page; | ||
501 | |||
502 | QETH_DBF_TEXT(trace, 5, "eddpcanp"); | ||
503 | /* can we put multiple skbs in one page? */ | ||
504 | skbs_per_page = PAGE_SIZE / (skb_shinfo(skb)->gso_size + hdr_len); | ||
505 | if (skbs_per_page > 1) { | ||
506 | ctx->num_pages = (skb_shinfo(skb)->gso_segs + 1) / | ||
507 | skbs_per_page + 1; | ||
508 | ctx->elements_per_skb = 1; | ||
509 | } else { | ||
510 | /* no -> how many elements per skb? */ | ||
511 | ctx->elements_per_skb = (skb_shinfo(skb)->gso_size + hdr_len + | ||
512 | PAGE_SIZE) >> PAGE_SHIFT; | ||
513 | ctx->num_pages = ctx->elements_per_skb * | ||
514 | (skb_shinfo(skb)->gso_segs + 1); | ||
515 | } | ||
516 | ctx->num_elements = ctx->elements_per_skb * | ||
517 | (skb_shinfo(skb)->gso_segs + 1); | ||
518 | } | ||
519 | |||
520 | static struct qeth_eddp_context *qeth_eddp_create_context_generic( | ||
521 | struct qeth_card *card, struct sk_buff *skb, int hdr_len) | ||
522 | { | ||
523 | struct qeth_eddp_context *ctx = NULL; | ||
524 | u8 *addr; | ||
525 | int i; | ||
526 | |||
527 | QETH_DBF_TEXT(trace, 5, "creddpcg"); | ||
528 | /* create the context and allocate pages */ | ||
529 | ctx = kzalloc(sizeof(struct qeth_eddp_context), GFP_ATOMIC); | ||
530 | if (ctx == NULL) { | ||
531 | QETH_DBF_TEXT(trace, 2, "ceddpcn1"); | ||
532 | return NULL; | ||
533 | } | ||
534 | ctx->type = QETH_LARGE_SEND_EDDP; | ||
535 | qeth_eddp_calc_num_pages(ctx, skb, hdr_len); | ||
536 | if (ctx->elements_per_skb > QETH_MAX_BUFFER_ELEMENTS(card)) { | ||
537 | QETH_DBF_TEXT(trace, 2, "ceddpcis"); | ||
538 | kfree(ctx); | ||
539 | return NULL; | ||
540 | } | ||
541 | ctx->pages = kcalloc(ctx->num_pages, sizeof(u8 *), GFP_ATOMIC); | ||
542 | if (ctx->pages == NULL) { | ||
543 | QETH_DBF_TEXT(trace, 2, "ceddpcn2"); | ||
544 | kfree(ctx); | ||
545 | return NULL; | ||
546 | } | ||
547 | for (i = 0; i < ctx->num_pages; ++i) { | ||
548 | addr = (u8 *)get_zeroed_page(GFP_ATOMIC); | ||
549 | if (addr == NULL) { | ||
550 | QETH_DBF_TEXT(trace, 2, "ceddpcn3"); | ||
551 | ctx->num_pages = i; | ||
552 | qeth_eddp_free_context(ctx); | ||
553 | return NULL; | ||
554 | } | ||
555 | ctx->pages[i] = addr; | ||
556 | } | ||
557 | ctx->elements = kcalloc(ctx->num_elements, | ||
558 | sizeof(struct qeth_eddp_element), GFP_ATOMIC); | ||
559 | if (ctx->elements == NULL) { | ||
560 | QETH_DBF_TEXT(trace, 2, "ceddpcn4"); | ||
561 | qeth_eddp_free_context(ctx); | ||
562 | return NULL; | ||
563 | } | ||
564 | /* reset num_elements; will be incremented again in fill_buffer to | ||
565 | * reflect number of actually used elements */ | ||
566 | ctx->num_elements = 0; | ||
567 | return ctx; | ||
568 | } | ||
569 | |||
570 | static struct qeth_eddp_context *qeth_eddp_create_context_tcp( | ||
571 | struct qeth_card *card, struct sk_buff *skb, | ||
572 | struct qeth_hdr *qhdr) | ||
573 | { | ||
574 | struct qeth_eddp_context *ctx = NULL; | ||
575 | |||
576 | QETH_DBF_TEXT(trace, 5, "creddpct"); | ||
577 | if (skb->protocol == htons(ETH_P_IP)) | ||
578 | ctx = qeth_eddp_create_context_generic(card, skb, | ||
579 | (sizeof(struct qeth_hdr) + | ||
580 | ip_hdrlen(skb) + | ||
581 | tcp_hdrlen(skb))); | ||
582 | else if (skb->protocol == htons(ETH_P_IPV6)) | ||
583 | ctx = qeth_eddp_create_context_generic(card, skb, | ||
584 | sizeof(struct qeth_hdr) + sizeof(struct ipv6hdr) + | ||
585 | tcp_hdrlen(skb)); | ||
586 | else | ||
587 | QETH_DBF_TEXT(trace, 2, "cetcpinv"); | ||
588 | |||
589 | if (ctx == NULL) { | ||
590 | QETH_DBF_TEXT(trace, 2, "creddpnl"); | ||
591 | return NULL; | ||
592 | } | ||
593 | if (qeth_eddp_fill_context_tcp(ctx, skb, qhdr)) { | ||
594 | QETH_DBF_TEXT(trace, 2, "ceddptfe"); | ||
595 | qeth_eddp_free_context(ctx); | ||
596 | return NULL; | ||
597 | } | ||
598 | atomic_set(&ctx->refcnt, 1); | ||
599 | return ctx; | ||
600 | } | ||
601 | |||
602 | struct qeth_eddp_context *qeth_eddp_create_context(struct qeth_card *card, | ||
603 | struct sk_buff *skb, struct qeth_hdr *qhdr, | ||
604 | unsigned char sk_protocol) | ||
605 | { | ||
606 | QETH_DBF_TEXT(trace, 5, "creddpc"); | ||
607 | switch (sk_protocol) { | ||
608 | case IPPROTO_TCP: | ||
609 | return qeth_eddp_create_context_tcp(card, skb, qhdr); | ||
610 | default: | ||
611 | QETH_DBF_TEXT(trace, 2, "eddpinvp"); | ||
612 | } | ||
613 | return NULL; | ||
614 | } | ||
615 | EXPORT_SYMBOL_GPL(qeth_eddp_create_context); | ||
616 | |||
617 | void qeth_tso_fill_header(struct qeth_card *card, struct qeth_hdr *qhdr, | ||
618 | struct sk_buff *skb) | ||
619 | { | ||
620 | struct qeth_hdr_tso *hdr = (struct qeth_hdr_tso *)qhdr; | ||
621 | struct tcphdr *tcph = tcp_hdr(skb); | ||
622 | struct iphdr *iph = ip_hdr(skb); | ||
623 | struct ipv6hdr *ip6h = ipv6_hdr(skb); | ||
624 | |||
625 | QETH_DBF_TEXT(trace, 5, "tsofhdr"); | ||
626 | |||
627 | /*fix header to TSO values ...*/ | ||
628 | hdr->hdr.hdr.l3.id = QETH_HEADER_TYPE_TSO; | ||
629 | /*set values which are fix for the first approach ...*/ | ||
630 | hdr->ext.hdr_tot_len = (__u16) sizeof(struct qeth_hdr_ext_tso); | ||
631 | hdr->ext.imb_hdr_no = 1; | ||
632 | hdr->ext.hdr_type = 1; | ||
633 | hdr->ext.hdr_version = 1; | ||
634 | hdr->ext.hdr_len = 28; | ||
635 | /*insert non-fix values */ | ||
636 | hdr->ext.mss = skb_shinfo(skb)->gso_size; | ||
637 | hdr->ext.dg_hdr_len = (__u16)(iph->ihl*4 + tcph->doff*4); | ||
638 | hdr->ext.payload_len = (__u16)(skb->len - hdr->ext.dg_hdr_len - | ||
639 | sizeof(struct qeth_hdr_tso)); | ||
640 | tcph->check = 0; | ||
641 | if (skb->protocol == ETH_P_IPV6) { | ||
642 | ip6h->payload_len = 0; | ||
643 | tcph->check = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | ||
644 | 0, IPPROTO_TCP, 0); | ||
645 | } else { | ||
646 | /*OSA want us to set these values ...*/ | ||
647 | tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, | ||
648 | 0, IPPROTO_TCP, 0); | ||
649 | iph->tot_len = 0; | ||
650 | iph->check = 0; | ||
651 | } | ||
652 | } | ||
653 | EXPORT_SYMBOL_GPL(qeth_tso_fill_header); | ||
654 | |||
655 | void qeth_tx_csum(struct sk_buff *skb) | ||
656 | { | ||
657 | int tlen; | ||
658 | if (skb->protocol == htons(ETH_P_IP)) { | ||
659 | tlen = ntohs(ip_hdr(skb)->tot_len) - (ip_hdr(skb)->ihl << 2); | ||
660 | switch (ip_hdr(skb)->protocol) { | ||
661 | case IPPROTO_TCP: | ||
662 | tcp_hdr(skb)->check = 0; | ||
663 | tcp_hdr(skb)->check = csum_tcpudp_magic( | ||
664 | ip_hdr(skb)->saddr, ip_hdr(skb)->daddr, | ||
665 | tlen, ip_hdr(skb)->protocol, | ||
666 | skb_checksum(skb, skb_transport_offset(skb), | ||
667 | tlen, 0)); | ||
668 | break; | ||
669 | case IPPROTO_UDP: | ||
670 | udp_hdr(skb)->check = 0; | ||
671 | udp_hdr(skb)->check = csum_tcpudp_magic( | ||
672 | ip_hdr(skb)->saddr, ip_hdr(skb)->daddr, | ||
673 | tlen, ip_hdr(skb)->protocol, | ||
674 | skb_checksum(skb, skb_transport_offset(skb), | ||
675 | tlen, 0)); | ||
676 | break; | ||
677 | } | ||
678 | } else if (skb->protocol == htons(ETH_P_IPV6)) { | ||
679 | switch (ipv6_hdr(skb)->nexthdr) { | ||
680 | case IPPROTO_TCP: | ||
681 | tcp_hdr(skb)->check = 0; | ||
682 | tcp_hdr(skb)->check = csum_ipv6_magic( | ||
683 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, | ||
684 | ipv6_hdr(skb)->payload_len, | ||
685 | ipv6_hdr(skb)->nexthdr, | ||
686 | skb_checksum(skb, skb_transport_offset(skb), | ||
687 | ipv6_hdr(skb)->payload_len, 0)); | ||
688 | break; | ||
689 | case IPPROTO_UDP: | ||
690 | udp_hdr(skb)->check = 0; | ||
691 | udp_hdr(skb)->check = csum_ipv6_magic( | ||
692 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, | ||
693 | ipv6_hdr(skb)->payload_len, | ||
694 | ipv6_hdr(skb)->nexthdr, | ||
695 | skb_checksum(skb, skb_transport_offset(skb), | ||
696 | ipv6_hdr(skb)->payload_len, 0)); | ||
697 | break; | ||
698 | } | ||
699 | } | ||
700 | } | ||
701 | EXPORT_SYMBOL_GPL(qeth_tx_csum); | ||