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preprocessor cleanup: __sparc
[unleashed/tickless.git] / kernel / drivers / net / nxge / nxge_send.c
blob49a9432cdf487107a96b4ff026bba55549b25ba8
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <sys/mac_provider.h>
27 #include <sys/nxge/nxge_impl.h>
28 #include <sys/nxge/nxge_hio.h>
29 #include <npi_tx_wr64.h>
30
31 /* Software LSO required header files */
32 #include <netinet/tcp.h>
33 #include <inet/ip_impl.h>
34 #include <inet/tcp.h>
35
36 extern uint64_t mac_pkt_hash(uint_t, mblk_t *mp, uint8_t policy,
37 boolean_t is_outbound);
38
39 static mblk_t *nxge_lso_eliminate(mblk_t *);
40 static mblk_t *nxge_do_softlso(mblk_t *mp, uint32_t mss);
41 static void nxge_lso_info_get(mblk_t *, uint32_t *, uint32_t *);
42 static void nxge_hcksum_retrieve(mblk_t *,
43 uint32_t *, uint32_t *, uint32_t *,
44 uint32_t *, uint32_t *);
45 static uint32_t nxge_csgen(uint16_t *, int);
46
47 extern uint32_t nxge_reclaim_pending;
48 extern uint32_t nxge_bcopy_thresh;
49 extern uint32_t nxge_dvma_thresh;
50 extern uint32_t nxge_dma_stream_thresh;
51 extern uint32_t nxge_tx_minfree;
52 extern uint32_t nxge_tx_intr_thres;
53 extern uint32_t nxge_tx_max_gathers;
54 extern uint32_t nxge_tx_tiny_pack;
55 extern uint32_t nxge_tx_use_bcopy;
56 extern nxge_tx_mode_t nxge_tx_scheme;
57 uint32_t nxge_lso_kick_cnt = 2;
58
59
60 void
61 nxge_tx_ring_task(void *arg)
62 {
63 p_tx_ring_t ring = (p_tx_ring_t)arg;
64
65 ASSERT(ring->tx_ring_handle != NULL);
66
67 MUTEX_ENTER(&ring->lock);
68 (void) nxge_txdma_reclaim(ring->nxgep, ring, 0);
69 MUTEX_EXIT(&ring->lock);
70
71 if (!ring->tx_ring_offline) {
72 mac_tx_ring_update(ring->nxgep->mach, ring->tx_ring_handle);
73 }
74 }
75
76 static void
77 nxge_tx_ring_dispatch(p_tx_ring_t ring)
78 {
79 /*
80 * Kick the ring task to reclaim some buffers.
81 */
82 (void) ddi_taskq_dispatch(ring->taskq,
83 nxge_tx_ring_task, (void *)ring, DDI_SLEEP);
84 }
85
86 mblk_t *
87 nxge_tx_ring_send(void *arg, mblk_t *mp)
88 {
89 p_nxge_ring_handle_t nrhp = (p_nxge_ring_handle_t)arg;
90 p_nxge_t nxgep;
91 p_tx_ring_t tx_ring_p;
92 int status, channel;
93
94 ASSERT(nrhp != NULL);
95 nxgep = nrhp->nxgep;
96 channel = nxgep->pt_config.hw_config.tdc.start + nrhp->index;
97 tx_ring_p = nxgep->tx_rings->rings[channel];
98
99 /*
100 * We may be in a transition from offlined DMA to onlined
101 * DMA.
102 */
103 if (tx_ring_p == NULL) {
104 ASSERT(tx_ring_p != NULL);
105 freemsg(mp);
106 return (NULL);
107 }
108
109 /*
110 * Valid DMA?
111 */
112 ASSERT(nxgep == tx_ring_p->nxgep);
113
114 /*
115 * Make sure DMA is not offlined.
116 */
117 if (isLDOMservice(nxgep) && tx_ring_p->tx_ring_offline) {
118 ASSERT(!tx_ring_p->tx_ring_offline);
119 freemsg(mp);
120 return (NULL);
121 }
122
123 /*
124 * Transmit the packet.
125 */
126 status = nxge_start(nxgep, tx_ring_p, mp);
127 if (status) {
128 nxge_tx_ring_dispatch(tx_ring_p);
129 return (mp);
130 }
131
132 return (NULL);
133 }
134
135 int
136 nxge_start(p_nxge_t nxgep, p_tx_ring_t tx_ring_p, p_mblk_t mp)
137 {
138 int dma_status, status = 0;
139 p_tx_desc_t tx_desc_ring_vp;
140 npi_handle_t npi_desc_handle;
141 nxge_os_dma_handle_t tx_desc_dma_handle;
142 p_tx_desc_t tx_desc_p;
143 p_tx_msg_t tx_msg_ring;
144 p_tx_msg_t tx_msg_p;
145 tx_desc_t tx_desc, *tmp_desc_p;
146 tx_desc_t sop_tx_desc, *sop_tx_desc_p;
147 p_tx_pkt_header_t hdrp;
148 tx_pkt_hdr_all_t tmp_hdrp;
149 p_tx_pkt_hdr_all_t pkthdrp;
150 uint8_t npads = 0;
151 uint64_t dma_ioaddr;
152 uint32_t dma_flags;
153 int last_bidx;
154 uint8_t *b_rptr;
155 caddr_t kaddr;
156 uint32_t nmblks;
157 uint32_t ngathers;
158 uint32_t clen;
159 int len;
160 uint32_t pkt_len, pack_len, min_len;
161 uint32_t bcopy_thresh;
162 int i, cur_index, sop_index;
163 uint16_t tail_index;
164 boolean_t tail_wrap = B_FALSE;
165 nxge_dma_common_t desc_area;
166 nxge_os_dma_handle_t dma_handle;
167 ddi_dma_cookie_t dma_cookie;
168 npi_handle_t npi_handle;
169 p_mblk_t nmp;
170 p_mblk_t t_mp;
171 uint32_t ncookies;
172 boolean_t good_packet;
173 boolean_t mark_mode = B_FALSE;
174 p_nxge_stats_t statsp;
175 p_nxge_tx_ring_stats_t tdc_stats;
176 t_uscalar_t start_offset = 0;
177 t_uscalar_t stuff_offset = 0;
178 t_uscalar_t end_offset = 0;
179 t_uscalar_t value = 0;
180 t_uscalar_t cksum_flags = 0;
181 boolean_t cksum_on = B_FALSE;
182 uint32_t boff = 0;
183 uint64_t tot_xfer_len = 0;
184 boolean_t header_set = B_FALSE;
185 #ifdef NXGE_DEBUG
186 p_tx_desc_t tx_desc_ring_pp;
187 p_tx_desc_t tx_desc_pp;
188 tx_desc_t *save_desc_p;
189 int dump_len;
190 int sad_len;
191 uint64_t sad;
192 int xfer_len;
193 uint32_t msgsize;
194 #endif
195 p_mblk_t mp_chain = NULL;
196 boolean_t is_lso = B_FALSE;
197 boolean_t lso_again;
198 int cur_index_lso;
199 p_mblk_t nmp_lso_save;
200 uint32_t lso_ngathers;
201 boolean_t lso_tail_wrap = B_FALSE;
202
203 NXGE_DEBUG_MSG((nxgep, TX_CTL,
204 "==> nxge_start: tx dma channel %d", tx_ring_p->tdc));
205 NXGE_DEBUG_MSG((nxgep, TX_CTL,
206 "==> nxge_start: Starting tdc %d desc pending %d",
207 tx_ring_p->tdc, tx_ring_p->descs_pending));
208
209 statsp = nxgep->statsp;
210
211 if (!isLDOMguest(nxgep)) {
212 switch (nxgep->mac.portmode) {
213 default:
214 if (nxgep->statsp->port_stats.lb_mode ==
215 nxge_lb_normal) {
216 if (!statsp->mac_stats.link_up) {
217 freemsg(mp);
218 NXGE_DEBUG_MSG((nxgep, TX_CTL,
219 "==> nxge_start: "
220 "link not up"));
221 goto nxge_start_fail1;
222 }
223 }
224 break;
225 case PORT_10G_FIBER:
226 /*
227 * For the following modes, check the link status
228 * before sending the packet out:
229 * nxge_lb_normal,
230 * nxge_lb_ext10g,
231 * nxge_lb_ext1000,
232 * nxge_lb_ext100,
233 * nxge_lb_ext10.
234 */
235 if (nxgep->statsp->port_stats.lb_mode <
236 nxge_lb_phy10g) {
237 if (!statsp->mac_stats.link_up) {
238 freemsg(mp);
239 NXGE_DEBUG_MSG((nxgep, TX_CTL,
240 "==> nxge_start: "
241 "link not up"));
242 goto nxge_start_fail1;
243 }
244 }
245 break;
246 }
247 }
248
249 if ((!(nxgep->drv_state & STATE_HW_INITIALIZED)) ||
250 (nxgep->nxge_mac_state != NXGE_MAC_STARTED)) {
251 NXGE_DEBUG_MSG((nxgep, TX_CTL,
252 "==> nxge_start: hardware not initialized or stopped"));
253 freemsg(mp);
254 goto nxge_start_fail1;
255 }
256
257 if (nxgep->soft_lso_enable) {
258 mp_chain = nxge_lso_eliminate(mp);
259 NXGE_DEBUG_MSG((nxgep, TX_CTL,
260 "==> nxge_start(0): LSO mp $%p mp_chain $%p",
261 mp, mp_chain));
262 if (mp_chain == NULL) {
263 NXGE_ERROR_MSG((nxgep, TX_CTL,
264 "==> nxge_send(0): NULL mp_chain $%p != mp $%p",
265 mp_chain, mp));
266 goto nxge_start_fail1;
267 }
268 if (mp_chain != mp) {
269 NXGE_DEBUG_MSG((nxgep, TX_CTL,
270 "==> nxge_send(1): IS LSO mp_chain $%p != mp $%p",
271 mp_chain, mp));
272 is_lso = B_TRUE;
273 mp = mp_chain;
274 mp_chain = mp_chain->b_next;
275 mp->b_next = NULL;
276 }
277 }
278
279 mac_hcksum_get(mp, &start_offset, &stuff_offset, &end_offset,
280 &value, &cksum_flags);
281 if (!NXGE_IS_VLAN_PACKET(mp->b_rptr)) {
282 start_offset += sizeof (ether_header_t);
283 stuff_offset += sizeof (ether_header_t);
284 } else {
285 start_offset += sizeof (struct ether_vlan_header);
286 stuff_offset += sizeof (struct ether_vlan_header);
287 }
288
289 if (cksum_flags & HCK_PARTIALCKSUM) {
290 NXGE_DEBUG_MSG((nxgep, TX_CTL,
291 "==> nxge_start: mp $%p len %d "
292 "cksum_flags 0x%x (partial checksum) ",
293 mp, MBLKL(mp), cksum_flags));
294 cksum_on = B_TRUE;
295 }
296
297 pkthdrp = (p_tx_pkt_hdr_all_t)&tmp_hdrp;
298 pkthdrp->reserved = 0;
299 tmp_hdrp.pkthdr.value = 0;
300 nxge_fill_tx_hdr(mp, B_FALSE, cksum_on,
301 0, 0, pkthdrp,
302 start_offset, stuff_offset);
303
304 lso_again = B_FALSE;
305 lso_ngathers = 0;
306
307 MUTEX_ENTER(&tx_ring_p->lock);
308
309 if (isLDOMservice(nxgep)) {
310 tx_ring_p->tx_ring_busy = B_TRUE;
311 if (tx_ring_p->tx_ring_offline) {
312 freemsg(mp);
313 tx_ring_p->tx_ring_busy = B_FALSE;
314 (void) atomic_swap_32(&tx_ring_p->tx_ring_offline,
315 NXGE_TX_RING_OFFLINED);
316 MUTEX_EXIT(&tx_ring_p->lock);
317 return (status);
318 }
319 }
320
321 cur_index_lso = tx_ring_p->wr_index;
322 lso_tail_wrap = tx_ring_p->wr_index_wrap;
323 start_again:
324 ngathers = 0;
325 sop_index = tx_ring_p->wr_index;
326 #ifdef NXGE_DEBUG
327 if (tx_ring_p->descs_pending) {
328 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: "
329 "desc pending %d ", tx_ring_p->descs_pending));
330 }
331
332 dump_len = (int)(MBLKL(mp));
333 dump_len = (dump_len > 128) ? 128: dump_len;
334
335 NXGE_DEBUG_MSG((nxgep, TX_CTL,
336 "==> nxge_start: tdc %d: dumping ...: b_rptr $%p "
337 "(Before header reserve: ORIGINAL LEN %d)",
338 tx_ring_p->tdc,
339 mp->b_rptr,
340 dump_len));
341
342 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: dump packets "
343 "(IP ORIGINAL b_rptr $%p): %s", mp->b_rptr,
344 nxge_dump_packet((char *)mp->b_rptr, dump_len)));
345 #endif
346
347 tdc_stats = tx_ring_p->tdc_stats;
348 mark_mode = (tx_ring_p->descs_pending &&
349 (((int)tx_ring_p->tx_ring_size - (int)tx_ring_p->descs_pending) <
350 (int)nxge_tx_minfree));
351
352 NXGE_DEBUG_MSG((nxgep, TX_CTL,
353 "TX Descriptor ring is channel %d mark mode %d",
354 tx_ring_p->tdc, mark_mode));
355
356 if ((tx_ring_p->descs_pending + lso_ngathers) >= nxge_reclaim_pending) {
357 if (!nxge_txdma_reclaim(nxgep, tx_ring_p,
358 (nxge_tx_minfree + lso_ngathers))) {
359 NXGE_DEBUG_MSG((nxgep, TX_CTL,
360 "TX Descriptor ring is full: channel %d",
361 tx_ring_p->tdc));
362 NXGE_DEBUG_MSG((nxgep, TX_CTL,
363 "TX Descriptor ring is full: channel %d",
364 tx_ring_p->tdc));
365 if (is_lso) {
366 /*
367 * free the current mp and mp_chain if not FULL.
368 */
369 tdc_stats->tx_no_desc++;
370 NXGE_DEBUG_MSG((nxgep, TX_CTL,
371 "LSO packet: TX Descriptor ring is full: "
372 "channel %d",
373 tx_ring_p->tdc));
374 goto nxge_start_fail_lso;
375 } else {
376 (void) atomic_cas_32(
377 (uint32_t *)&tx_ring_p->queueing, 0, 1);
378 tdc_stats->tx_no_desc++;
379
380 if (isLDOMservice(nxgep)) {
381 tx_ring_p->tx_ring_busy = B_FALSE;
382 if (tx_ring_p->tx_ring_offline) {
383 (void) atomic_swap_32(
384 &tx_ring_p->tx_ring_offline,
385 NXGE_TX_RING_OFFLINED);
386 }
387 }
388
389 MUTEX_EXIT(&tx_ring_p->lock);
390 status = 1;
391 goto nxge_start_fail1;
392 }
393 }
394 }
395
396 nmp = mp;
397 i = sop_index = tx_ring_p->wr_index;
398 nmblks = 0;
399 ngathers = 0;
400 pkt_len = 0;
401 pack_len = 0;
402 clen = 0;
403 last_bidx = -1;
404 good_packet = B_TRUE;
405
406 desc_area = tx_ring_p->tdc_desc;
407 npi_handle = desc_area.npi_handle;
408 npi_desc_handle.regh = (nxge_os_acc_handle_t)
409 DMA_COMMON_ACC_HANDLE(desc_area);
410 tx_desc_ring_vp = (p_tx_desc_t)DMA_COMMON_VPTR(desc_area);
411 tx_desc_dma_handle = (nxge_os_dma_handle_t)
412 DMA_COMMON_HANDLE(desc_area);
413 tx_msg_ring = tx_ring_p->tx_msg_ring;
414
415 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: wr_index %d i %d",
416 sop_index, i));
417
418 #ifdef NXGE_DEBUG
419 msgsize = msgdsize(nmp);
420 NXGE_DEBUG_MSG((nxgep, TX_CTL,
421 "==> nxge_start(1): wr_index %d i %d msgdsize %d",
422 sop_index, i, msgsize));
423 #endif
424 /*
425 * The first 16 bytes of the premapped buffer are reserved
426 * for header. No padding will be used.
427 */
428 pkt_len = pack_len = boff = TX_PKT_HEADER_SIZE;
429 if (nxge_tx_use_bcopy && (nxgep->niu_type != N2_NIU)) {
430 bcopy_thresh = (nxge_bcopy_thresh - TX_PKT_HEADER_SIZE);
431 } else {
432 bcopy_thresh = (TX_BCOPY_SIZE - TX_PKT_HEADER_SIZE);
433 }
434 while (nmp) {
435 good_packet = B_TRUE;
436 b_rptr = nmp->b_rptr;
437 len = MBLKL(nmp);
438 if (len <= 0) {
439 nmp = nmp->b_cont;
440 continue;
441 }
442 nmblks++;
443
444 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(1): nmblks %d "
445 "len %d pkt_len %d pack_len %d",
446 nmblks, len, pkt_len, pack_len));
447 /*
448 * Hardware limits the transfer length to 4K for NIU and
449 * 4076 (TX_MAX_TRANSFER_LENGTH) for Neptune. But we just
450 * use TX_MAX_TRANSFER_LENGTH as the limit for both.
451 * If len is longer than the limit, then we break nmp into
452 * two chunks: Make the first chunk equal to the limit and
453 * the second chunk for the remaining data. If the second
454 * chunk is still larger than the limit, then it will be
455 * broken into two in the next pass.
456 */
457 if (len > TX_MAX_TRANSFER_LENGTH - TX_PKT_HEADER_SIZE) {
458 if ((t_mp = dupb(nmp)) != NULL) {
459 nmp->b_wptr = nmp->b_rptr +
460 (TX_MAX_TRANSFER_LENGTH
461 - TX_PKT_HEADER_SIZE);
462 t_mp->b_rptr = nmp->b_wptr;
463 t_mp->b_cont = nmp->b_cont;
464 nmp->b_cont = t_mp;
465 len = MBLKL(nmp);
466 } else {
467 if (is_lso) {
468 NXGE_DEBUG_MSG((nxgep, TX_CTL,
469 "LSO packet: dupb failed: "
470 "channel %d",
471 tx_ring_p->tdc));
472 mp = nmp;
473 goto nxge_start_fail_lso;
474 } else {
475 good_packet = B_FALSE;
476 goto nxge_start_fail2;
477 }
478 }
479 }
480 tx_desc.value = 0;
481 tx_desc_p = &tx_desc_ring_vp[i];
482 #ifdef NXGE_DEBUG
483 tx_desc_pp = &tx_desc_ring_pp[i];
484 #endif
485 tx_msg_p = &tx_msg_ring[i];
486 #if defined(__i386)
487 npi_desc_handle.regp = (uint32_t)tx_desc_p;
488 #else
489 npi_desc_handle.regp = (uint64_t)tx_desc_p;
490 #endif
491 if (!header_set &&
492 ((!nxge_tx_use_bcopy && (len > TX_BCOPY_SIZE)) ||
493 (len >= bcopy_thresh))) {
494 header_set = B_TRUE;
495 bcopy_thresh += TX_PKT_HEADER_SIZE;
496 boff = 0;
497 pack_len = 0;
498 kaddr = (caddr_t)DMA_COMMON_VPTR(tx_msg_p->buf_dma);
499 hdrp = (p_tx_pkt_header_t)kaddr;
500 clen = pkt_len;
501 dma_handle = tx_msg_p->buf_dma_handle;
502 dma_ioaddr = DMA_COMMON_IOADDR(tx_msg_p->buf_dma);
503 (void) ddi_dma_sync(dma_handle,
504 i * nxge_bcopy_thresh, nxge_bcopy_thresh,
505 DDI_DMA_SYNC_FORDEV);
506
507 tx_msg_p->flags.dma_type = USE_BCOPY;
508 goto nxge_start_control_header_only;
509 }
510
511 pkt_len += len;
512 pack_len += len;
513
514 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(3): "
515 "desc entry %d "
516 "DESC IOADDR $%p "
517 "desc_vp $%p tx_desc_p $%p "
518 "desc_pp $%p tx_desc_pp $%p "
519 "len %d pkt_len %d pack_len %d",
520 i,
521 DMA_COMMON_IOADDR(desc_area),
522 tx_desc_ring_vp, tx_desc_p,
523 tx_desc_ring_pp, tx_desc_pp,
524 len, pkt_len, pack_len));
525
526 if (len < bcopy_thresh) {
527 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(4): "
528 "USE BCOPY: "));
529 if (nxge_tx_tiny_pack) {
530 uint32_t blst =
531 TXDMA_DESC_NEXT_INDEX(i, -1,
532 tx_ring_p->tx_wrap_mask);
533 NXGE_DEBUG_MSG((nxgep, TX_CTL,
534 "==> nxge_start(5): pack"));
535 if ((pack_len <= bcopy_thresh) &&
536 (last_bidx == blst)) {
537 NXGE_DEBUG_MSG((nxgep, TX_CTL,
538 "==> nxge_start: pack(6) "
539 "(pkt_len %d pack_len %d)",
540 pkt_len, pack_len));
541 i = blst;
542 tx_desc_p = &tx_desc_ring_vp[i];
543 #ifdef NXGE_DEBUG
544 tx_desc_pp = &tx_desc_ring_pp[i];
545 #endif
546 tx_msg_p = &tx_msg_ring[i];
547 boff = pack_len - len;
548 ngathers--;
549 } else if (pack_len > bcopy_thresh &&
550 header_set) {
551 pack_len = len;
552 boff = 0;
553 bcopy_thresh = nxge_bcopy_thresh;
554 NXGE_DEBUG_MSG((nxgep, TX_CTL,
555 "==> nxge_start(7): > max NEW "
556 "bcopy thresh %d "
557 "pkt_len %d pack_len %d(next)",
558 bcopy_thresh,
559 pkt_len, pack_len));
560 }
561 last_bidx = i;
562 }
563 kaddr = (caddr_t)DMA_COMMON_VPTR(tx_msg_p->buf_dma);
564 if ((boff == TX_PKT_HEADER_SIZE) && (nmblks == 1)) {
565 hdrp = (p_tx_pkt_header_t)kaddr;
566 header_set = B_TRUE;
567 NXGE_DEBUG_MSG((nxgep, TX_CTL,
568 "==> nxge_start(7_x2): "
569 "pkt_len %d pack_len %d (new hdrp $%p)",
570 pkt_len, pack_len, hdrp));
571 }
572 tx_msg_p->flags.dma_type = USE_BCOPY;
573 kaddr += boff;
574 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(8): "
575 "USE BCOPY: before bcopy "
576 "DESC IOADDR $%p entry %d "
577 "bcopy packets %d "
578 "bcopy kaddr $%p "
579 "bcopy ioaddr (SAD) $%p "
580 "bcopy clen %d "
581 "bcopy boff %d",
582 DMA_COMMON_IOADDR(desc_area), i,
583 tdc_stats->tx_hdr_pkts,
584 kaddr,
585 dma_ioaddr,
586 clen,
587 boff));
588 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: "
589 "1USE BCOPY: "));
590 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: "
591 "2USE BCOPY: "));
592 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: "
593 "last USE BCOPY: copy from b_rptr $%p "
594 "to KADDR $%p (len %d offset %d",
595 b_rptr, kaddr, len, boff));
596
597 bcopy(b_rptr, kaddr, len);
598
599 #ifdef NXGE_DEBUG
600 dump_len = (len > 128) ? 128: len;
601 NXGE_DEBUG_MSG((nxgep, TX_CTL,
602 "==> nxge_start: dump packets "
603 "(After BCOPY len %d)"
604 "(b_rptr $%p): %s", len, nmp->b_rptr,
605 nxge_dump_packet((char *)nmp->b_rptr,
606 dump_len)));
607 #endif
608
609 dma_handle = tx_msg_p->buf_dma_handle;
610 dma_ioaddr = DMA_COMMON_IOADDR(tx_msg_p->buf_dma);
611 (void) ddi_dma_sync(dma_handle,
612 i * nxge_bcopy_thresh, nxge_bcopy_thresh,
613 DDI_DMA_SYNC_FORDEV);
614 clen = len + boff;
615 tdc_stats->tx_hdr_pkts++;
616 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(9): "
617 "USE BCOPY: "
618 "DESC IOADDR $%p entry %d "
619 "bcopy packets %d "
620 "bcopy kaddr $%p "
621 "bcopy ioaddr (SAD) $%p "
622 "bcopy clen %d "
623 "bcopy boff %d",
624 DMA_COMMON_IOADDR(desc_area),
625 i,
626 tdc_stats->tx_hdr_pkts,
627 kaddr,
628 dma_ioaddr,
629 clen,
630 boff));
631 } else {
632 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(12): "
633 "USE DVMA: len %d", len));
634 tx_msg_p->flags.dma_type = USE_DMA;
635 dma_flags = DDI_DMA_WRITE;
636 if (len < nxge_dma_stream_thresh) {
637 dma_flags |= DDI_DMA_CONSISTENT;
638 } else {
639 dma_flags |= DDI_DMA_STREAMING;
640 }
641
642 dma_handle = tx_msg_p->dma_handle;
643 dma_status = ddi_dma_addr_bind_handle(dma_handle, NULL,
644 (caddr_t)b_rptr, len, dma_flags,
645 DDI_DMA_DONTWAIT, NULL,
646 &dma_cookie, &ncookies);
647 if (dma_status == DDI_DMA_MAPPED) {
648 dma_ioaddr = dma_cookie.dmac_laddress;
649 len = (int)dma_cookie.dmac_size;
650 clen = (uint32_t)dma_cookie.dmac_size;
651 NXGE_DEBUG_MSG((nxgep, TX_CTL,
652 "==> nxge_start(12_1): "
653 "USE DVMA: len %d clen %d "
654 "ngathers %d",
655 len, clen,
656 ngathers));
657 #if defined(__i386)
658 npi_desc_handle.regp = (uint32_t)tx_desc_p;
659 #else
660 npi_desc_handle.regp = (uint64_t)tx_desc_p;
661 #endif
662 while (ncookies > 1) {
663 ngathers++;
664 /*
665 * this is the fix for multiple
666 * cookies, which are basically
667 * a descriptor entry, we don't set
668 * SOP bit as well as related fields
669 */
670
671 (void) npi_txdma_desc_gather_set(
672 npi_desc_handle,
673 &tx_desc,
674 (ngathers -1),
675 mark_mode,
676 ngathers,
677 dma_ioaddr,
678 clen);
679
680 tx_msg_p->tx_msg_size = clen;
681 NXGE_DEBUG_MSG((nxgep, TX_CTL,
682 "==> nxge_start: DMA "
683 "ncookie %d "
684 "ngathers %d "
685 "dma_ioaddr $%p len %d"
686 "desc $%p descp $%p (%d)",
687 ncookies,
688 ngathers,
689 dma_ioaddr, clen,
690 *tx_desc_p, tx_desc_p, i));
691
692 ddi_dma_nextcookie(dma_handle,
693 &dma_cookie);
694 dma_ioaddr =
695 dma_cookie.dmac_laddress;
696
697 len = (int)dma_cookie.dmac_size;
698 clen = (uint32_t)dma_cookie.dmac_size;
699 NXGE_DEBUG_MSG((nxgep, TX_CTL,
700 "==> nxge_start(12_2): "
701 "USE DVMA: len %d clen %d ",
702 len, clen));
703
704 i = TXDMA_DESC_NEXT_INDEX(i, 1,
705 tx_ring_p->tx_wrap_mask);
706 tx_desc_p = &tx_desc_ring_vp[i];
707
708 #if defined(__i386)
709 npi_desc_handle.regp =
710 (uint32_t)tx_desc_p;
711 #else
712 npi_desc_handle.regp =
713 (uint64_t)tx_desc_p;
714 #endif
715 tx_msg_p = &tx_msg_ring[i];
716 tx_msg_p->flags.dma_type = USE_NONE;
717 tx_desc.value = 0;
718
719 ncookies--;
720 }
721 tdc_stats->tx_ddi_pkts++;
722 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start:"
723 "DMA: ddi packets %d",
724 tdc_stats->tx_ddi_pkts));
725 } else {
726 NXGE_ERROR_MSG((nxgep, NXGE_ERR_CTL,
727 "dma mapping failed for %d "
728 "bytes addr $%p flags %x (%d)",
729 len, b_rptr, status, status));
730 good_packet = B_FALSE;
731 tdc_stats->tx_dma_bind_fail++;
732 tx_msg_p->flags.dma_type = USE_NONE;
733 if (is_lso) {
734 mp = nmp;
735 goto nxge_start_fail_lso;
736 } else {
737 status = 1;
738 goto nxge_start_fail2;
739 }
740 }
741 } /* ddi dvma */
742
743 if (is_lso) {
744 nmp_lso_save = nmp;
745 }
746 nmp = nmp->b_cont;
747 nxge_start_control_header_only:
748 #if defined(__i386)
749 npi_desc_handle.regp = (uint32_t)tx_desc_p;
750 #else
751 npi_desc_handle.regp = (uint64_t)tx_desc_p;
752 #endif
753 ngathers++;
754
755 if (ngathers == 1) {
756 #ifdef NXGE_DEBUG
757 save_desc_p = &sop_tx_desc;
758 #endif
759 sop_tx_desc_p = &sop_tx_desc;
760 sop_tx_desc_p->value = 0;
761 sop_tx_desc_p->bits.hdw.tr_len = clen;
762 sop_tx_desc_p->bits.hdw.sad = dma_ioaddr >> 32;
763 sop_tx_desc_p->bits.ldw.sad = dma_ioaddr & 0xffffffff;
764 } else {
765 #ifdef NXGE_DEBUG
766 save_desc_p = &tx_desc;
767 #endif
768 tmp_desc_p = &tx_desc;
769 tmp_desc_p->value = 0;
770 tmp_desc_p->bits.hdw.tr_len = clen;
771 tmp_desc_p->bits.hdw.sad = dma_ioaddr >> 32;
772 tmp_desc_p->bits.ldw.sad = dma_ioaddr & 0xffffffff;
773
774 tx_desc_p->value = tmp_desc_p->value;
775 }
776
777 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(13): "
778 "Desc_entry %d ngathers %d "
779 "desc_vp $%p tx_desc_p $%p "
780 "len %d clen %d pkt_len %d pack_len %d nmblks %d "
781 "dma_ioaddr (SAD) $%p mark %d",
782 i, ngathers,
783 tx_desc_ring_vp, tx_desc_p,
784 len, clen, pkt_len, pack_len, nmblks,
785 dma_ioaddr, mark_mode));
786
787 #ifdef NXGE_DEBUG
788 npi_desc_handle.nxgep = nxgep;
789 npi_desc_handle.function.function = nxgep->function_num;
790 npi_desc_handle.function.instance = nxgep->instance;
791 sad = (save_desc_p->value & TX_PKT_DESC_SAD_MASK);
792 xfer_len = ((save_desc_p->value & TX_PKT_DESC_TR_LEN_MASK) >>
793 TX_PKT_DESC_TR_LEN_SHIFT);
794
795
796 NXGE_DEBUG_MSG((nxgep, TX_CTL, "\n\t: value 0x%llx\n"
797 "\t\tsad $%p\ttr_len %d len %d\tnptrs %d\t"
798 "mark %d sop %d\n",
799 save_desc_p->value,
800 sad,
801 save_desc_p->bits.hdw.tr_len,
802 xfer_len,
803 save_desc_p->bits.hdw.num_ptr,
804 save_desc_p->bits.hdw.mark,
805 save_desc_p->bits.hdw.sop));
806
807 npi_txdma_dump_desc_one(npi_desc_handle, NULL, i);
808 #endif
809
810 tx_msg_p->tx_msg_size = clen;
811 i = TXDMA_DESC_NEXT_INDEX(i, 1, tx_ring_p->tx_wrap_mask);
812 if (ngathers > nxge_tx_max_gathers) {
813 good_packet = B_FALSE;
814 mac_hcksum_get(mp, &start_offset,
815 &stuff_offset, &end_offset, &value,
816 &cksum_flags);
817
818 NXGE_DEBUG_MSG((NULL, TX_CTL,
819 "==> nxge_start(14): pull msg - "
820 "len %d pkt_len %d ngathers %d",
821 len, pkt_len, ngathers));
822
823 /*
824 * Just give up on this packet.
825 */
826 if (is_lso) {
827 mp = nmp_lso_save;
828 goto nxge_start_fail_lso;
829 }
830 status = 0;
831 goto nxge_start_fail2;
832 }
833 } /* while (nmp) */
834
835 tx_msg_p->tx_message = mp;
836 tx_desc_p = &tx_desc_ring_vp[sop_index];
837 #if defined(__i386)
838 npi_desc_handle.regp = (uint32_t)tx_desc_p;
839 #else
840 npi_desc_handle.regp = (uint64_t)tx_desc_p;
841 #endif
842
843 pkthdrp = (p_tx_pkt_hdr_all_t)hdrp;
844 pkthdrp->reserved = 0;
845 hdrp->value = 0;
846 bcopy(&tmp_hdrp, hdrp, sizeof (tx_pkt_header_t));
847
848 if (pkt_len > NXGE_MTU_DEFAULT_MAX) {
849 tdc_stats->tx_jumbo_pkts++;
850 }
851
852 min_len = (ETHERMIN + TX_PKT_HEADER_SIZE + (npads * 2));
853 if (pkt_len < min_len) {
854 /* Assume we use bcopy to premapped buffers */
855 kaddr = (caddr_t)DMA_COMMON_VPTR(tx_msg_p->buf_dma);
856 NXGE_DEBUG_MSG((NULL, TX_CTL,
857 "==> nxge_start(14-1): < (msg_min + 16)"
858 "len %d pkt_len %d min_len %d bzero %d ngathers %d",
859 len, pkt_len, min_len, (min_len - pkt_len), ngathers));
860 bzero((kaddr + pkt_len), (min_len - pkt_len));
861 pkt_len = tx_msg_p->tx_msg_size = min_len;
862
863 sop_tx_desc_p->bits.hdw.tr_len = min_len;
864
865 NXGE_MEM_PIO_WRITE64(npi_desc_handle, sop_tx_desc_p->value);
866 tx_desc_p->value = sop_tx_desc_p->value;
867
868 NXGE_DEBUG_MSG((NULL, TX_CTL,
869 "==> nxge_start(14-2): < msg_min - "
870 "len %d pkt_len %d min_len %d ngathers %d",
871 len, pkt_len, min_len, ngathers));
872 }
873
874 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: cksum_flags 0x%x ",
875 cksum_flags));
876 {
877 uint64_t tmp_len;
878
879 /* pkt_len already includes 16 + paddings!! */
880 /* Update the control header length */
881 tot_xfer_len = (pkt_len - TX_PKT_HEADER_SIZE);
882 tmp_len = hdrp->value |
883 (tot_xfer_len << TX_PKT_HEADER_TOT_XFER_LEN_SHIFT);
884
885 NXGE_DEBUG_MSG((nxgep, TX_CTL,
886 "==> nxge_start(15_x1): setting SOP "
887 "tot_xfer_len 0x%llx (%d) pkt_len %d tmp_len "
888 "0x%llx hdrp->value 0x%llx",
889 tot_xfer_len, tot_xfer_len, pkt_len,
890 tmp_len, hdrp->value));
891 #if defined(_BIG_ENDIAN)
892 hdrp->value = ddi_swap64(tmp_len);
893 #else
894 hdrp->value = tmp_len;
895 #endif
896 NXGE_DEBUG_MSG((nxgep,
897 TX_CTL, "==> nxge_start(15_x2): setting SOP "
898 "after SWAP: tot_xfer_len 0x%llx pkt_len %d "
899 "tmp_len 0x%llx hdrp->value 0x%llx",
900 tot_xfer_len, pkt_len,
901 tmp_len, hdrp->value));
902 }
903
904 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(15): setting SOP "
905 "wr_index %d "
906 "tot_xfer_len (%d) pkt_len %d npads %d",
907 sop_index,
908 tot_xfer_len, pkt_len,
909 npads));
910
911 sop_tx_desc_p->bits.hdw.sop = 1;
912 sop_tx_desc_p->bits.hdw.mark = mark_mode;
913 sop_tx_desc_p->bits.hdw.num_ptr = ngathers;
914
915 NXGE_MEM_PIO_WRITE64(npi_desc_handle, sop_tx_desc_p->value);
916
917 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start(16): set SOP done"));
918
919 #ifdef NXGE_DEBUG
920 npi_desc_handle.nxgep = nxgep;
921 npi_desc_handle.function.function = nxgep->function_num;
922 npi_desc_handle.function.instance = nxgep->instance;
923
924 NXGE_DEBUG_MSG((nxgep, TX_CTL, "\n\t: value 0x%llx\n"
925 "\t\tsad $%p\ttr_len %d len %d\tnptrs %d\tmark %d sop %d\n",
926 save_desc_p->value,
927 sad,
928 save_desc_p->bits.hdw.tr_len,
929 xfer_len,
930 save_desc_p->bits.hdw.num_ptr,
931 save_desc_p->bits.hdw.mark,
932 save_desc_p->bits.hdw.sop));
933 (void) npi_txdma_dump_desc_one(npi_desc_handle, NULL, sop_index);
934
935 dump_len = (pkt_len > 128) ? 128: pkt_len;
936 NXGE_DEBUG_MSG((nxgep, TX_CTL,
937 "==> nxge_start: dump packets(17) (after sop set, len "
938 " (len/dump_len/pkt_len/tot_xfer_len) %d/%d/%d/%d):\n"
939 "ptr $%p: %s", len, dump_len, pkt_len, tot_xfer_len,
940 (char *)hdrp,
941 nxge_dump_packet((char *)hdrp, dump_len)));
942 NXGE_DEBUG_MSG((nxgep, TX_CTL,
943 "==> nxge_start(18): TX desc sync: sop_index %d",
944 sop_index));
945 #endif
946
947 if ((ngathers == 1) || tx_ring_p->wr_index < i) {
948 (void) ddi_dma_sync(tx_desc_dma_handle,
949 sop_index * sizeof (tx_desc_t),
950 ngathers * sizeof (tx_desc_t),
951 DDI_DMA_SYNC_FORDEV);
952
953 NXGE_DEBUG_MSG((nxgep, TX_CTL, "nxge_start(19): sync 1 "
954 "cs_off = 0x%02X cs_s_off = 0x%02X "
955 "pkt_len %d ngathers %d sop_index %d\n",
956 stuff_offset, start_offset,
957 pkt_len, ngathers, sop_index));
958 } else { /* more than one descriptor and wrap around */
959 uint32_t nsdescs = tx_ring_p->tx_ring_size - sop_index;
960 (void) ddi_dma_sync(tx_desc_dma_handle,
961 sop_index * sizeof (tx_desc_t),
962 nsdescs * sizeof (tx_desc_t),
963 DDI_DMA_SYNC_FORDEV);
964 NXGE_DEBUG_MSG((nxgep, TX_CTL, "nxge_start(20): sync 1 "
965 "cs_off = 0x%02X cs_s_off = 0x%02X "
966 "pkt_len %d ngathers %d sop_index %d\n",
967 stuff_offset, start_offset,
968 pkt_len, ngathers, sop_index));
969
970 (void) ddi_dma_sync(tx_desc_dma_handle,
971 0,
972 (ngathers - nsdescs) * sizeof (tx_desc_t),
973 DDI_DMA_SYNC_FORDEV);
974 NXGE_DEBUG_MSG((nxgep, TX_CTL, "nxge_start(21): sync 2 "
975 "cs_off = 0x%02X cs_s_off = 0x%02X "
976 "pkt_len %d ngathers %d sop_index %d\n",
977 stuff_offset, start_offset,
978 pkt_len, ngathers, sop_index));
979 }
980
981 tail_index = tx_ring_p->wr_index;
982 tail_wrap = tx_ring_p->wr_index_wrap;
983
984 tx_ring_p->wr_index = i;
985 if (tx_ring_p->wr_index <= tail_index) {
986 tx_ring_p->wr_index_wrap = ((tail_wrap == B_TRUE) ?
987 B_FALSE : B_TRUE);
988 }
989
990 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: TX kick: "
991 "channel %d wr_index %d wrap %d ngathers %d desc_pend %d",
992 tx_ring_p->tdc,
993 tx_ring_p->wr_index,
994 tx_ring_p->wr_index_wrap,
995 ngathers,
996 tx_ring_p->descs_pending));
997
998 if (is_lso) {
999 lso_ngathers += ngathers;
1000 if (mp_chain != NULL) {
1001 mp = mp_chain;
1002 mp_chain = mp_chain->b_next;
1003 mp->b_next = NULL;
1004 if (nxge_lso_kick_cnt == lso_ngathers) {
1005 tx_ring_p->descs_pending += lso_ngathers;
1006 {
1007 tx_ring_kick_t kick;
1008
1009 kick.value = 0;
1010 kick.bits.ldw.wrap =
1011 tx_ring_p->wr_index_wrap;
1012 kick.bits.ldw.tail =
1013 (uint16_t)tx_ring_p->wr_index;
1014
1015 /* Kick the Transmit kick register */
1016 TXDMA_REG_WRITE64(
1017 NXGE_DEV_NPI_HANDLE(nxgep),
1018 TX_RING_KICK_REG,
1019 (uint8_t)tx_ring_p->tdc,
1020 kick.value);
1021 tdc_stats->tx_starts++;
1022
1023 NXGE_DEBUG_MSG((nxgep, TX_CTL,
1024 "==> nxge_start: more LSO: "
1025 "LSO_CNT %d",
1026 lso_ngathers));
1027 }
1028 lso_ngathers = 0;
1029 ngathers = 0;
1030 cur_index_lso = sop_index = tx_ring_p->wr_index;
1031 lso_tail_wrap = tx_ring_p->wr_index_wrap;
1032 }
1033 NXGE_DEBUG_MSG((nxgep, TX_CTL,
1034 "==> nxge_start: lso again: "
1035 "lso_gathers %d ngathers %d cur_index_lso %d "
1036 "wr_index %d sop_index %d",
1037 lso_ngathers, ngathers, cur_index_lso,
1038 tx_ring_p->wr_index, sop_index));
1039
1040 NXGE_DEBUG_MSG((nxgep, TX_CTL,
1041 "==> nxge_start: next : count %d",
1042 lso_ngathers));
1043 lso_again = B_TRUE;
1044 goto start_again;
1045 }
1046 ngathers = lso_ngathers;
1047 }
1048
1049 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: TX KICKING: "));
1050
1051 {
1052 tx_ring_kick_t kick;
1053
1054 kick.value = 0;
1055 kick.bits.ldw.wrap = tx_ring_p->wr_index_wrap;
1056 kick.bits.ldw.tail = (uint16_t)tx_ring_p->wr_index;
1057
1058 /* Kick start the Transmit kick register */
1059 TXDMA_REG_WRITE64(NXGE_DEV_NPI_HANDLE(nxgep),
1060 TX_RING_KICK_REG,
1061 (uint8_t)tx_ring_p->tdc,
1062 kick.value);
1063 }
1064
1065 tx_ring_p->descs_pending += ngathers;
1066 tdc_stats->tx_starts++;
1067
1068 if (isLDOMservice(nxgep)) {
1069 tx_ring_p->tx_ring_busy = B_FALSE;
1070 if (tx_ring_p->tx_ring_offline) {
1071 (void) atomic_swap_32(&tx_ring_p->tx_ring_offline,
1072 NXGE_TX_RING_OFFLINED);
1073 }
1074 }
1075
1076 MUTEX_EXIT(&tx_ring_p->lock);
1077
1078 NXGE_DEBUG_MSG((nxgep, TX_CTL, "<== nxge_start"));
1079 return (status);
1080
1081 nxge_start_fail_lso:
1082 status = 0;
1083 good_packet = B_FALSE;
1084 if (mp != NULL)
1085 freemsg(mp);
1086 if (mp_chain != NULL)
1087 freemsgchain(mp_chain);
1088
1089 if (!lso_again && !ngathers) {
1090 if (isLDOMservice(nxgep)) {
1091 tx_ring_p->tx_ring_busy = B_FALSE;
1092 if (tx_ring_p->tx_ring_offline) {
1093 (void) atomic_swap_32(
1094 &tx_ring_p->tx_ring_offline,
1095 NXGE_TX_RING_OFFLINED);
1096 }
1097 }
1098
1099 MUTEX_EXIT(&tx_ring_p->lock);
1100 NXGE_DEBUG_MSG((nxgep, TX_CTL,
1101 "==> nxge_start: lso exit (nothing changed)"));
1102 goto nxge_start_fail1;
1103 }
1104
1105 NXGE_DEBUG_MSG((nxgep, TX_CTL,
1106 "==> nxge_start (channel %d): before lso "
1107 "lso_gathers %d ngathers %d cur_index_lso %d "
1108 "wr_index %d sop_index %d lso_again %d",
1109 tx_ring_p->tdc,
1110 lso_ngathers, ngathers, cur_index_lso,
1111 tx_ring_p->wr_index, sop_index, lso_again));
1112
1113 if (lso_again) {
1114 lso_ngathers += ngathers;
1115 ngathers = lso_ngathers;
1116 sop_index = cur_index_lso;
1117 tx_ring_p->wr_index = sop_index;
1118 tx_ring_p->wr_index_wrap = lso_tail_wrap;
1119 }
1120
1121 NXGE_DEBUG_MSG((nxgep, TX_CTL,
1122 "==> nxge_start (channel %d): after lso "
1123 "lso_gathers %d ngathers %d cur_index_lso %d "
1124 "wr_index %d sop_index %d lso_again %d",
1125 tx_ring_p->tdc,
1126 lso_ngathers, ngathers, cur_index_lso,
1127 tx_ring_p->wr_index, sop_index, lso_again));
1128
1129 nxge_start_fail2:
1130 if (good_packet == B_FALSE) {
1131 cur_index = sop_index;
1132 NXGE_DEBUG_MSG((nxgep, TX_CTL, "==> nxge_start: clean up"));
1133 for (i = 0; i < ngathers; i++) {
1134 tx_desc_p = &tx_desc_ring_vp[cur_index];
1135 #if defined(__i386)
1136 npi_handle.regp = (uint32_t)tx_desc_p;
1137 #else
1138 npi_handle.regp = (uint64_t)tx_desc_p;
1139 #endif
1140 tx_msg_p = &tx_msg_ring[cur_index];
1141 (void) npi_txdma_desc_set_zero(npi_handle, 1);
1142 if (tx_msg_p->flags.dma_type == USE_DVMA) {
1143 NXGE_DEBUG_MSG((nxgep, TX_CTL,
1144 "tx_desc_p = %X index = %d",
1145 tx_desc_p, tx_ring_p->rd_index));
1146 (void) dvma_unload(tx_msg_p->dvma_handle,
1147 0, -1);
1148 tx_msg_p->dvma_handle = NULL;
1149 if (tx_ring_p->dvma_wr_index ==
1150 tx_ring_p->dvma_wrap_mask)
1151 tx_ring_p->dvma_wr_index = 0;
1152 else
1153 tx_ring_p->dvma_wr_index++;
1154 tx_ring_p->dvma_pending--;
1155 } else if (tx_msg_p->flags.dma_type == USE_DMA) {
1156 if (ddi_dma_unbind_handle(
1157 tx_msg_p->dma_handle)) {
1158 cmn_err(CE_WARN, "!nxge_start: "
1159 "ddi_dma_unbind_handle failed");
1160 }
1161 }
1162 tx_msg_p->flags.dma_type = USE_NONE;
1163 cur_index = TXDMA_DESC_NEXT_INDEX(cur_index, 1,
1164 tx_ring_p->tx_wrap_mask);
1165
1166 }
1167 }
1168
1169 if (isLDOMservice(nxgep)) {
1170 tx_ring_p->tx_ring_busy = B_FALSE;
1171 if (tx_ring_p->tx_ring_offline) {
1172 (void) atomic_swap_32(&tx_ring_p->tx_ring_offline,
1173 NXGE_TX_RING_OFFLINED);
1174 }
1175 }
1176
1177 MUTEX_EXIT(&tx_ring_p->lock);
1178
1179 nxge_start_fail1:
1180 /* Add FMA to check the access handle nxge_hregh */
1181
1182 NXGE_DEBUG_MSG((nxgep, TX_CTL, "<== nxge_start"));
1183 return (status);
1184 }
1185
1186 /* Software LSO starts here */
1187 static void
1188 nxge_hcksum_retrieve(mblk_t *mp,
1189 uint32_t *start, uint32_t *stuff, uint32_t *end,
1190 uint32_t *value, uint32_t *flags)
1191 {
1192 if (mp->b_datap->db_type == M_DATA) {
1193 if (flags != NULL) {
1194 *flags = DB_CKSUMFLAGS(mp) & (HCK_IPV4_HDRCKSUM |
1195 HCK_PARTIALCKSUM | HCK_FULLCKSUM |
1196 HCK_FULLCKSUM_OK);
1197 if ((*flags & (HCK_PARTIALCKSUM |
1198 HCK_FULLCKSUM)) != 0) {
1199 if (value != NULL)
1200 *value = (uint32_t)DB_CKSUM16(mp);
1201 if ((*flags & HCK_PARTIALCKSUM) != 0) {
1202 if (start != NULL)
1203 *start =
1204 (uint32_t)DB_CKSUMSTART(mp);
1205 if (stuff != NULL)
1206 *stuff =
1207 (uint32_t)DB_CKSUMSTUFF(mp);
1208 if (end != NULL)
1209 *end =
1210 (uint32_t)DB_CKSUMEND(mp);
1211 }
1212 }
1213 }
1214 }
1215 }
1216
1217 static void
1218 nxge_lso_info_get(mblk_t *mp, uint32_t *mss, uint32_t *flags)
1219 {
1220 ASSERT(DB_TYPE(mp) == M_DATA);
1221
1222 *mss = 0;
1223 if (flags != NULL) {
1224 *flags = DB_CKSUMFLAGS(mp) & HW_LSO;
1225 if ((*flags != 0) && (mss != NULL)) {
1226 *mss = (uint32_t)DB_LSOMSS(mp);
1227 }
1228 NXGE_DEBUG_MSG((NULL, TX_CTL,
1229 "==> nxge_lso_info_get(flag !=NULL): mss %d *flags 0x%x",
1230 *mss, *flags));
1231 }
1232
1233 NXGE_DEBUG_MSG((NULL, TX_CTL,
1234 "<== nxge_lso_info_get: mss %d", *mss));
1235 }
1236
1237 /*
1238 * Do Soft LSO on the oversized packet.
1239 *
1240 * 1. Create a chain of message for headers.
1241 * 2. Fill up header messages with proper information.
1242 * 3. Copy Eithernet, IP, and TCP headers from the original message to
1243 * each new message with necessary adjustments.
1244 * * Unchange the ethernet header for DIX frames. (by default)
1245 * * IP Total Length field is updated to MSS or less(only for the last one).
1246 * * IP Identification value is incremented by one for each packet.
1247 * * TCP sequence Number is recalculated according to the payload length.
1248 * * Set FIN and/or PSH flags for the *last* packet if applied.
1249 * * TCP partial Checksum
1250 * 4. Update LSO information in the first message header.
1251 * 5. Release the original message header.
1252 */
1253 static mblk_t *
1254 nxge_do_softlso(mblk_t *mp, uint32_t mss)
1255 {
1256 uint32_t hckflags;
1257 int pktlen;
1258 int hdrlen;
1259 int segnum;
1260 int i;
1261 struct ether_vlan_header *evh;
1262 int ehlen, iphlen, tcphlen;
1263 struct ip *oiph, *niph;
1264 struct tcphdr *otcph, *ntcph;
1265 int available, len, left;
1266 uint16_t ip_id;
1267 uint32_t tcp_seq;
1268 mblk_t *datamp;
1269 uchar_t *rptr;
1270 mblk_t *nmp;
1271 mblk_t *cmp;
1272 mblk_t *mp_chain;
1273 boolean_t do_cleanup = B_FALSE;
1274 t_uscalar_t start_offset = 0;
1275 t_uscalar_t stuff_offset = 0;
1276 t_uscalar_t value = 0;
1277 uint16_t l4_len;
1278 ipaddr_t src, dst;
1279 uint32_t cksum, sum, l4cksum;
1280
1281 NXGE_DEBUG_MSG((NULL, TX_CTL,
1282 "==> nxge_do_softlso"));
1283 /*
1284 * check the length of LSO packet payload and calculate the number of
1285 * segments to be generated.
1286 */
1287 pktlen = msgsize(mp);
1288 evh = (struct ether_vlan_header *)mp->b_rptr;
1289
1290 /* VLAN? */
1291 if (evh->ether_tpid == htons(ETHERTYPE_VLAN))
1292 ehlen = sizeof (struct ether_vlan_header);
1293 else
1294 ehlen = sizeof (struct ether_header);
1295 oiph = (struct ip *)(mp->b_rptr + ehlen);
1296 iphlen = oiph->ip_hl * 4;
1297 otcph = (struct tcphdr *)(mp->b_rptr + ehlen + iphlen);
1298 tcphlen = otcph->th_off * 4;
1299
1300 l4_len = pktlen - ehlen - iphlen;
1301
1302 NXGE_DEBUG_MSG((NULL, TX_CTL,
1303 "==> nxge_do_softlso: mss %d oiph $%p "
1304 "original ip_sum oiph->ip_sum 0x%x "
1305 "original tcp_sum otcph->th_sum 0x%x "
1306 "oiph->ip_len %d pktlen %d ehlen %d "
1307 "l4_len %d (0x%x) ip_len - iphlen %d ",
1308 mss,
1309 oiph,
1310 oiph->ip_sum,
1311 otcph->th_sum,
1312 ntohs(oiph->ip_len), pktlen,
1313 ehlen,
1314 l4_len,
1315 l4_len,
1316 ntohs(oiph->ip_len) - iphlen));
1317
1318 /* IPv4 + TCP */
1319 if (!(oiph->ip_v == IPV4_VERSION)) {
1320 NXGE_ERROR_MSG((NULL, NXGE_ERR_CTL,
1321 "<== nxge_do_softlso: not IPV4 "
1322 "oiph->ip_len %d pktlen %d ehlen %d tcphlen %d",
1323 ntohs(oiph->ip_len), pktlen, ehlen,
1324 tcphlen));
1325 freemsg(mp);
1326 return (NULL);
1327 }
1328
1329 if (!(oiph->ip_p == IPPROTO_TCP)) {
1330 NXGE_ERROR_MSG((NULL, NXGE_ERR_CTL,
1331 "<== nxge_do_softlso: not TCP "
1332 "oiph->ip_len %d pktlen %d ehlen %d tcphlen %d",
1333 ntohs(oiph->ip_len), pktlen, ehlen,
1334 tcphlen));
1335 freemsg(mp);
1336 return (NULL);
1337 }
1338
1339 if (!(ntohs(oiph->ip_len) == pktlen - ehlen)) {
1340 NXGE_ERROR_MSG((NULL, NXGE_ERR_CTL,
1341 "<== nxge_do_softlso: len not matched "
1342 "oiph->ip_len %d pktlen %d ehlen %d tcphlen %d",
1343 ntohs(oiph->ip_len), pktlen, ehlen,
1344 tcphlen));
1345 freemsg(mp);
1346 return (NULL);
1347 }
1348
1349 otcph = (struct tcphdr *)(mp->b_rptr + ehlen + iphlen);
1350 tcphlen = otcph->th_off * 4;
1351
1352 /* TCP flags can not include URG, RST, or SYN */
1353 VERIFY((otcph->th_flags & (TH_SYN | TH_RST | TH_URG)) == 0);
1354
1355 hdrlen = ehlen + iphlen + tcphlen;
1356
1357 VERIFY(MBLKL(mp) >= hdrlen);
1358
1359 if (MBLKL(mp) > hdrlen) {
1360 datamp = mp;
1361 rptr = mp->b_rptr + hdrlen;
1362 } else { /* = */
1363 datamp = mp->b_cont;
1364 rptr = datamp->b_rptr;
1365 }
1366
1367 NXGE_DEBUG_MSG((NULL, TX_CTL,
1368 "nxge_do_softlso: otcph $%p pktlen: %d, "
1369 "hdrlen %d ehlen %d iphlen %d tcphlen %d "
1370 "mblkl(mp): %d, mblkl(datamp): %d",
1371 otcph,
1372 pktlen, hdrlen, ehlen, iphlen, tcphlen,
1373 (int)MBLKL(mp), (int)MBLKL(datamp)));
1374
1375 hckflags = 0;
1376 nxge_hcksum_retrieve(mp,
1377 &start_offset, &stuff_offset, &value, NULL, &hckflags);
1378
1379 dst = oiph->ip_dst.s_addr;
1380 src = oiph->ip_src.s_addr;
1381
1382 cksum = (dst >> 16) + (dst & 0xFFFF) +
1383 (src >> 16) + (src & 0xFFFF);
1384 l4cksum = cksum + IP_TCP_CSUM_COMP;
1385
1386 sum = l4_len + l4cksum;
1387 sum = (sum & 0xFFFF) + (sum >> 16);
1388
1389 NXGE_DEBUG_MSG((NULL, TX_CTL,
1390 "==> nxge_do_softlso: dst 0x%x src 0x%x sum 0x%x ~new 0x%x "
1391 "hckflags 0x%x start_offset %d stuff_offset %d "
1392 "value (original) 0x%x th_sum 0x%x "
1393 "pktlen %d l4_len %d (0x%x) "
1394 "MBLKL(mp): %d, MBLKL(datamp): %d dump header %s",
1395 dst, src,
1396 (sum & 0xffff), (~sum & 0xffff),
1397 hckflags, start_offset, stuff_offset,
1398 value, otcph->th_sum,
1399 pktlen,
1400 l4_len,
1401 l4_len,
1402 ntohs(oiph->ip_len) - (int)MBLKL(mp),
1403 (int)MBLKL(datamp),
1404 nxge_dump_packet((char *)evh, 12)));
1405
1406 /*
1407 * Start to process.
1408 */
1409 available = pktlen - hdrlen;
1410 segnum = (available - 1) / mss + 1;
1411
1412 NXGE_DEBUG_MSG((NULL, TX_CTL,
1413 "==> nxge_do_softlso: pktlen %d "
1414 "MBLKL(mp): %d, MBLKL(datamp): %d "
1415 "available %d mss %d segnum %d",
1416 pktlen, (int)MBLKL(mp), (int)MBLKL(datamp),
1417 available,
1418 mss,
1419 segnum));
1420
1421 VERIFY(segnum >= 2);
1422
1423 /*
1424 * Try to pre-allocate all header messages
1425 */
1426 mp_chain = NULL;
1427 for (i = 0; i < segnum; i++) {
1428 if ((nmp = allocb(hdrlen, 0)) == NULL) {
1429 /* Clean up the mp_chain */
1430 while (mp_chain != NULL) {
1431 nmp = mp_chain;
1432 mp_chain = mp_chain->b_next;
1433 freemsg(nmp);
1434 }
1435 NXGE_DEBUG_MSG((NULL, TX_CTL,
1436 "<== nxge_do_softlso: "
1437 "Could not allocate enough messages for headers!"));
1438 freemsg(mp);
1439 return (NULL);
1440 }
1441 nmp->b_next = mp_chain;
1442 mp_chain = nmp;
1443
1444 NXGE_DEBUG_MSG((NULL, TX_CTL,
1445 "==> nxge_do_softlso: "
1446 "mp $%p nmp $%p mp_chain $%p mp_chain->b_next $%p",
1447 mp, nmp, mp_chain, mp_chain->b_next));
1448 }
1449
1450 NXGE_DEBUG_MSG((NULL, TX_CTL,
1451 "==> nxge_do_softlso: mp $%p nmp $%p mp_chain $%p",
1452 mp, nmp, mp_chain));
1453
1454 /*
1455 * Associate payload with new packets
1456 */
1457 cmp = mp_chain;
1458 left = available;
1459 while (cmp != NULL) {
1460 nmp = dupb(datamp);
1461 if (nmp == NULL) {
1462 do_cleanup = B_TRUE;
1463 NXGE_DEBUG_MSG((NULL, TX_CTL,
1464 "==>nxge_do_softlso: "
1465 "Can not dupb(datamp), have to do clean up"));
1466 goto cleanup_allocated_msgs;
1467 }
1468
1469 NXGE_DEBUG_MSG((NULL, TX_CTL,
1470 "==> nxge_do_softlso: (loop) before mp $%p cmp $%p "
1471 "dupb nmp $%p len %d left %d msd %d ",
1472 mp, cmp, nmp, len, left, mss));
1473
1474 cmp->b_cont = nmp;
1475 nmp->b_rptr = rptr;
1476 len = (left < mss) ? left : mss;
1477 left -= len;
1478
1479 NXGE_DEBUG_MSG((NULL, TX_CTL,
1480 "==> nxge_do_softlso: (loop) after mp $%p cmp $%p "
1481 "dupb nmp $%p len %d left %d mss %d ",
1482 mp, cmp, nmp, len, left, mss));
1483 NXGE_DEBUG_MSG((NULL, TX_CTL,
1484 "nxge_do_softlso: before available: %d, "
1485 "left: %d, len: %d, segnum: %d MBLK(nmp): %d",
1486 available, left, len, segnum, (int)MBLKL(nmp)));
1487
1488 len -= MBLKL(nmp);
1489 NXGE_DEBUG_MSG((NULL, TX_CTL,
1490 "nxge_do_softlso: after available: %d, "
1491 "left: %d, len: %d, segnum: %d MBLK(nmp): %d",
1492 available, left, len, segnum, (int)MBLKL(nmp)));
1493
1494 while (len > 0) {
1495 mblk_t *mmp = NULL;
1496
1497 NXGE_DEBUG_MSG((NULL, TX_CTL,
1498 "nxge_do_softlso: (4) len > 0 available: %d, "
1499 "left: %d, len: %d, segnum: %d MBLK(nmp): %d",
1500 available, left, len, segnum, (int)MBLKL(nmp)));
1501
1502 if (datamp->b_cont != NULL) {
1503 datamp = datamp->b_cont;
1504 rptr = datamp->b_rptr;
1505 mmp = dupb(datamp);
1506 if (mmp == NULL) {
1507 do_cleanup = B_TRUE;
1508 NXGE_DEBUG_MSG((NULL, TX_CTL,
1509 "==> nxge_do_softlso: "
1510 "Can not dupb(datamp) (1), :"
1511 "have to do clean up"));
1512 NXGE_DEBUG_MSG((NULL, TX_CTL,
1513 "==> nxge_do_softlso: "
1514 "available: %d, left: %d, "
1515 "len: %d, MBLKL(nmp): %d",
1516 available, left, len,
1517 (int)MBLKL(nmp)));
1518 goto cleanup_allocated_msgs;
1519 }
1520 } else {
1521 NXGE_ERROR_MSG((NULL, NXGE_ERR_CTL,
1522 "==> nxge_do_softlso: "
1523 "(1)available: %d, left: %d, "
1524 "len: %d, MBLKL(nmp): %d",
1525 available, left, len,
1526 (int)MBLKL(nmp)));
1527 cmn_err(CE_PANIC,
1528 "==> nxge_do_softlso: "
1529 "Pointers must have been corrupted!\n"
1530 "datamp: $%p, nmp: $%p, rptr: $%p",
1531 (void *)datamp,
1532 (void *)nmp,
1533 (void *)rptr);
1534 }
1535 nmp->b_cont = mmp;
1536 nmp = mmp;
1537 len -= MBLKL(nmp);
1538 }
1539 if (len < 0) {
1540 nmp->b_wptr += len;
1541 rptr = nmp->b_wptr;
1542 NXGE_DEBUG_MSG((NULL, TX_CTL,
1543 "(5) len < 0 (less than 0)"
1544 "available: %d, left: %d, len: %d, MBLKL(nmp): %d",
1545 available, left, len, (int)MBLKL(nmp)));
1546
1547 } else if (len == 0) {
1548 if (datamp->b_cont != NULL) {
1549 NXGE_DEBUG_MSG((NULL, TX_CTL,
1550 "(5) len == 0"
1551 "available: %d, left: %d, len: %d, "
1552 "MBLKL(nmp): %d",
1553 available, left, len, (int)MBLKL(nmp)));
1554 datamp = datamp->b_cont;
1555 rptr = datamp->b_rptr;
1556 } else {
1557 NXGE_DEBUG_MSG((NULL, TX_CTL,
1558 "(6)available b_cont == NULL : %d, "
1559 "left: %d, len: %d, MBLKL(nmp): %d",
1560 available, left, len, (int)MBLKL(nmp)));
1561
1562 VERIFY(cmp->b_next == NULL);
1563 VERIFY(left == 0);
1564 break; /* Done! */
1565 }
1566 }
1567 cmp = cmp->b_next;
1568
1569 NXGE_DEBUG_MSG((NULL, TX_CTL,
1570 "(7) do_softlso: "
1571 "next mp in mp_chain available len != 0 : %d, "
1572 "left: %d, len: %d, MBLKL(nmp): %d",
1573 available, left, len, (int)MBLKL(nmp)));
1574 }
1575
1576 /*
1577 * From now, start to fill up all headers for the first message
1578 * Hardware checksum flags need to be updated separately for FULLCKSUM
1579 * and PARTIALCKSUM cases. For full checksum, copy the original flags
1580 * into every new packet is enough. But for HCK_PARTIALCKSUM, all
1581 * required fields need to be updated properly.
1582 */
1583 nmp = mp_chain;
1584 bcopy(mp->b_rptr, nmp->b_rptr, hdrlen);
1585 nmp->b_wptr = nmp->b_rptr + hdrlen;
1586 niph = (struct ip *)(nmp->b_rptr + ehlen);
1587 niph->ip_len = htons(mss + iphlen + tcphlen);
1588 ip_id = ntohs(niph->ip_id);
1589 ntcph = (struct tcphdr *)(nmp->b_rptr + ehlen + iphlen);
1590 tcp_seq = ntohl(ntcph->th_seq);
1591
1592 ntcph->th_flags &= ~(TH_FIN | TH_PUSH | TH_RST);
1593
1594 DB_CKSUMFLAGS(nmp) = (uint16_t)hckflags;
1595 DB_CKSUMSTART(nmp) = start_offset;
1596 DB_CKSUMSTUFF(nmp) = stuff_offset;
1597
1598 /* calculate IP checksum and TCP pseudo header checksum */
1599 niph->ip_sum = 0;
1600 niph->ip_sum = (uint16_t)nxge_csgen((uint16_t *)niph, iphlen);
1601
1602 l4_len = mss + tcphlen;
1603 sum = htons(l4_len) + l4cksum;
1604 sum = (sum & 0xFFFF) + (sum >> 16);
1605 ntcph->th_sum = (sum & 0xffff);
1606
1607 NXGE_DEBUG_MSG((NULL, TX_CTL,
1608 "==> nxge_do_softlso: first mp $%p (mp_chain $%p) "
1609 "mss %d pktlen %d l4_len %d (0x%x) "
1610 "MBLKL(mp): %d, MBLKL(datamp): %d "
1611 "ip_sum 0x%x "
1612 "th_sum 0x%x sum 0x%x ) "
1613 "dump first ip->tcp %s",
1614 nmp, mp_chain,
1615 mss,
1616 pktlen,
1617 l4_len,
1618 l4_len,
1619 (int)MBLKL(mp), (int)MBLKL(datamp),
1620 niph->ip_sum,
1621 ntcph->th_sum,
1622 sum,
1623 nxge_dump_packet((char *)niph, 52)));
1624
1625 cmp = nmp;
1626 while ((nmp = nmp->b_next)->b_next != NULL) {
1627 NXGE_DEBUG_MSG((NULL, TX_CTL,
1628 "==>nxge_do_softlso: middle l4_len %d ", l4_len));
1629 bcopy(cmp->b_rptr, nmp->b_rptr, hdrlen);
1630 nmp->b_wptr = nmp->b_rptr + hdrlen;
1631 niph = (struct ip *)(nmp->b_rptr + ehlen);
1632 niph->ip_id = htons(++ip_id);
1633 niph->ip_len = htons(mss + iphlen + tcphlen);
1634 ntcph = (struct tcphdr *)(nmp->b_rptr + ehlen + iphlen);
1635 tcp_seq += mss;
1636
1637 ntcph->th_flags &= ~(TH_FIN | TH_PUSH | TH_RST | TH_URG);
1638
1639 ntcph->th_seq = htonl(tcp_seq);
1640 DB_CKSUMFLAGS(nmp) = (uint16_t)hckflags;
1641 DB_CKSUMSTART(nmp) = start_offset;
1642 DB_CKSUMSTUFF(nmp) = stuff_offset;
1643
1644 /* calculate IP checksum and TCP pseudo header checksum */
1645 niph->ip_sum = 0;
1646 niph->ip_sum = (uint16_t)nxge_csgen((uint16_t *)niph, iphlen);
1647 ntcph->th_sum = (sum & 0xffff);
1648
1649 NXGE_DEBUG_MSG((NULL, TX_CTL,
1650 "==> nxge_do_softlso: middle ip_sum 0x%x "
1651 "th_sum 0x%x "
1652 " mp $%p (mp_chain $%p) pktlen %d "
1653 "MBLKL(mp): %d, MBLKL(datamp): %d ",
1654 niph->ip_sum,
1655 ntcph->th_sum,
1656 nmp, mp_chain,
1657 pktlen, (int)MBLKL(mp), (int)MBLKL(datamp)));
1658 }
1659
1660 /* Last segment */
1661 /*
1662 * Set FIN and/or PSH flags if present only in the last packet.
1663 * The ip_len could be different from prior packets.
1664 */
1665 bcopy(cmp->b_rptr, nmp->b_rptr, hdrlen);
1666 nmp->b_wptr = nmp->b_rptr + hdrlen;
1667 niph = (struct ip *)(nmp->b_rptr + ehlen);
1668 niph->ip_id = htons(++ip_id);
1669 niph->ip_len = htons(msgsize(nmp->b_cont) + iphlen + tcphlen);
1670 ntcph = (struct tcphdr *)(nmp->b_rptr + ehlen + iphlen);
1671 tcp_seq += mss;
1672 ntcph->th_seq = htonl(tcp_seq);
1673 ntcph->th_flags = (otcph->th_flags & ~TH_URG);
1674
1675 DB_CKSUMFLAGS(nmp) = (uint16_t)hckflags;
1676 DB_CKSUMSTART(nmp) = start_offset;
1677 DB_CKSUMSTUFF(nmp) = stuff_offset;
1678
1679 /* calculate IP checksum and TCP pseudo header checksum */
1680 niph->ip_sum = 0;
1681 niph->ip_sum = (uint16_t)nxge_csgen((uint16_t *)niph, iphlen);
1682
1683 l4_len = ntohs(niph->ip_len) - iphlen;
1684 sum = htons(l4_len) + l4cksum;
1685 sum = (sum & 0xFFFF) + (sum >> 16);
1686 ntcph->th_sum = (sum & 0xffff);
1687
1688 NXGE_DEBUG_MSG((NULL, TX_CTL,
1689 "==> nxge_do_softlso: last next "
1690 "niph->ip_sum 0x%x "
1691 "ntcph->th_sum 0x%x sum 0x%x "
1692 "dump last ip->tcp %s "
1693 "cmp $%p mp $%p (mp_chain $%p) pktlen %d (0x%x) "
1694 "l4_len %d (0x%x) "
1695 "MBLKL(mp): %d, MBLKL(datamp): %d ",
1696 niph->ip_sum,
1697 ntcph->th_sum, sum,
1698 nxge_dump_packet((char *)niph, 52),
1699 cmp, nmp, mp_chain,
1700 pktlen, pktlen,
1701 l4_len,
1702 l4_len,
1703 (int)MBLKL(mp), (int)MBLKL(datamp)));
1704
1705 cleanup_allocated_msgs:
1706 if (do_cleanup) {
1707 NXGE_DEBUG_MSG((NULL, TX_CTL,
1708 "==> nxge_do_softlso: "
1709 "Failed allocating messages, "
1710 "have to clean up and fail!"));
1711 while (mp_chain != NULL) {
1712 nmp = mp_chain;
1713 mp_chain = mp_chain->b_next;
1714 freemsg(nmp);
1715 }
1716 }
1717 /*
1718 * We're done here, so just free the original message and return the
1719 * new message chain, that could be NULL if failed, back to the caller.
1720 */
1721 freemsg(mp);
1722
1723 NXGE_DEBUG_MSG((NULL, TX_CTL,
1724 "<== nxge_do_softlso:mp_chain $%p", mp_chain));
1725 return (mp_chain);
1726 }
1727
1728 /*
1729 * Will be called before NIC driver do further operation on the message.
1730 * The input message may include LSO information, if so, go to softlso logic
1731 * to eliminate the oversized LSO packet for the incapable underlying h/w.
1732 * The return could be the same non-LSO message or a message chain for LSO case.
1733 *
1734 * The driver needs to call this function per packet and process the whole chain
1735 * if applied.
1736 */
1737 static mblk_t *
1738 nxge_lso_eliminate(mblk_t *mp)
1739 {
1740 uint32_t lsoflags;
1741 uint32_t mss;
1742
1743 NXGE_DEBUG_MSG((NULL, TX_CTL,
1744 "==>nxge_lso_eliminate:"));
1745 nxge_lso_info_get(mp, &mss, &lsoflags);
1746
1747 if (lsoflags & HW_LSO) {
1748 mblk_t *nmp;
1749
1750 NXGE_DEBUG_MSG((NULL, TX_CTL,
1751 "==>nxge_lso_eliminate:"
1752 "HW_LSO:mss %d mp $%p",
1753 mss, mp));
1754 if ((nmp = nxge_do_softlso(mp, mss)) != NULL) {
1755 NXGE_DEBUG_MSG((NULL, TX_CTL,
1756 "<== nxge_lso_eliminate: "
1757 "LSO: nmp not NULL nmp $%p mss %d mp $%p",
1758 nmp, mss, mp));
1759 return (nmp);
1760 } else {
1761 NXGE_DEBUG_MSG((NULL, TX_CTL,
1762 "<== nxge_lso_eliminate_ "
1763 "LSO: failed nmp NULL nmp $%p mss %d mp $%p",
1764 nmp, mss, mp));
1765 return (NULL);
1766 }
1767 }
1768
1769 NXGE_DEBUG_MSG((NULL, TX_CTL,
1770 "<== nxge_lso_eliminate"));
1771 return (mp);
1772 }
1773
1774 static uint32_t
1775 nxge_csgen(uint16_t *adr, int len)
1776 {
1777 int i, odd;
1778 uint32_t sum = 0;
1779 uint32_t c = 0;
1780
1781 odd = len % 2;
1782 for (i = 0; i < (len / 2); i++) {
1783 sum += (adr[i] & 0xffff);
1784 }
1785 if (odd) {
1786 sum += adr[len / 2] & 0xff00;
1787 }
1788 while ((c = ((sum & 0xffff0000) >> 16)) != 0) {
1789 sum &= 0xffff;
1790 sum += c;
1791 }
1792 return (~sum & 0xffff);
1793 }
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