1 /***********************license start***************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2008 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 ***********************license end**************************************/
27
28 /**
29 *
30 * This header file defines the work queue entry (wqe) data structure.
31 * Since this is a commonly used structure that depends on structures
32 * from several hardware blocks, those definitions have been placed
33 * in this file to create a single point of definition of the wqe
34 * format.
35 * Data structures are still named according to the block that they
36 * relate to.
37 *
38 */
39
40 #ifndef __CVMX_WQE_H__
41 #define __CVMX_WQE_H__
42
43 #include <asm/octeon/cvmx-packet.h>
44
45
46 #define OCT_TAG_TYPE_STRING(x) \
47 (((x) == CVMX_POW_TAG_TYPE_ORDERED) ? "ORDERED" : \
48 (((x) == CVMX_POW_TAG_TYPE_ATOMIC) ? "ATOMIC" : \
49 (((x) == CVMX_POW_TAG_TYPE_NULL) ? "NULL" : \
50 "NULL_NULL")))
51
52 /**
53 * HW decode / err_code in work queue entry
54 */
55 typedef union {
56 uint64_t u64;
57
58 /* Use this struct if the hardware determines that the packet is IP */
59 struct {
60 #ifdef __BIG_ENDIAN_BITFIELD
61 /* HW sets this to the number of buffers used by this packet */
62 uint64_t bufs:8;
63 /* HW sets to the number of L2 bytes prior to the IP */
64 uint64_t ip_offset:8;
65 /* set to 1 if we found DSA/VLAN in the L2 */
66 uint64_t vlan_valid:1;
67 /* Set to 1 if the DSA/VLAN tag is stacked */
68 uint64_t vlan_stacked:1;
69 uint64_t unassigned:1;
70 /* HW sets to the DSA/VLAN CFI flag (valid when vlan_valid) */
71 uint64_t vlan_cfi:1;
72 /* HW sets to the DSA/VLAN_ID field (valid when vlan_valid) */
73 uint64_t vlan_id:12;
74 /* Ring Identifier (if PCIe). Requires PIP_GBL_CTL[RING_EN]=1 */
75 uint64_t pr:4;
76 uint64_t unassigned2:8;
77 /* the packet needs to be decompressed */
78 uint64_t dec_ipcomp:1;
79 /* the packet is either TCP or UDP */
80 uint64_t tcp_or_udp:1;
81 /* the packet needs to be decrypted (ESP or AH) */
82 uint64_t dec_ipsec:1;
83 /* the packet is IPv6 */
84 uint64_t is_v6:1;
85
86 /*
87 * (rcv_error, not_IP, IP_exc, is_frag, L4_error,
88 * software, etc.).
89 */
90
91 /*
92 * reserved for software use, hardware will clear on
93 * packet creation.
94 */
95 uint64_t software:1;
96 /* exceptional conditions below */
97 /* the receive interface hardware detected an L4 error
98 * (only applies if !is_frag) (only applies if
99 * !rcv_error && !not_IP && !IP_exc && !is_frag)
100 * failure indicated in err_code below, decode:
101 *
102 * - 1 = Malformed L4
103 * - 2 = L4 Checksum Error: the L4 checksum value is
104 * - 3 = UDP Length Error: The UDP length field would
105 * make the UDP data longer than what remains in
106 * the IP packet (as defined by the IP header
107 * length field).
108 * - 4 = Bad L4 Port: either the source or destination
109 * TCP/UDP port is 0.
110 * - 8 = TCP FIN Only: the packet is TCP and only the
111 * FIN flag set.
112 * - 9 = TCP No Flags: the packet is TCP and no flags
113 * are set.
114 * - 10 = TCP FIN RST: the packet is TCP and both FIN
115 * and RST are set.
116 * - 11 = TCP SYN URG: the packet is TCP and both SYN
117 * and URG are set.
118 * - 12 = TCP SYN RST: the packet is TCP and both SYN
119 * and RST are set.
120 * - 13 = TCP SYN FIN: the packet is TCP and both SYN
121 * and FIN are set.
122 */
123 uint64_t L4_error:1;
124 /* set if the packet is a fragment */
125 uint64_t is_frag:1;
126 /* the receive interface hardware detected an IP error
127 * / exception (only applies if !rcv_error && !not_IP)
128 * failure indicated in err_code below, decode:
129 *
130 * - 1 = Not IP: the IP version field is neither 4 nor
131 * 6.
132 * - 2 = IPv4 Header Checksum Error: the IPv4 header
133 * has a checksum violation.
134 * - 3 = IP Malformed Header: the packet is not long
135 * enough to contain the IP header.
136 * - 4 = IP Malformed: the packet is not long enough
137 * to contain the bytes indicated by the IP
138 * header. Pad is allowed.
139 * - 5 = IP TTL Hop: the IPv4 TTL field or the IPv6
140 * Hop Count field are zero.
141 * - 6 = IP Options
142 */
143 uint64_t IP_exc:1;
144 /*
145 * Set if the hardware determined that the packet is a
146 * broadcast.
147 */
148 uint64_t is_bcast:1;
149 /*
150 * St if the hardware determined that the packet is a
151 * multi-cast.
152 */
153 uint64_t is_mcast:1;
154 /*
155 * Set if the packet may not be IP (must be zero in
156 * this case).
157 */
158 uint64_t not_IP:1;
159 /*
160 * The receive interface hardware detected a receive
161 * error (must be zero in this case).
162 */
163 uint64_t rcv_error:1;
164 /* lower err_code = first-level descriptor of the
165 * work */
166 /* zero for packet submitted by hardware that isn't on
167 * the slow path */
168 /* type is cvmx_pip_err_t */
169 uint64_t err_code:8;
170 #else
171 uint64_t err_code:8;
172 uint64_t rcv_error:1;
173 uint64_t not_IP:1;
174 uint64_t is_mcast:1;
175 uint64_t is_bcast:1;
176 uint64_t IP_exc:1;
177 uint64_t is_frag:1;
178 uint64_t L4_error:1;
179 uint64_t software:1;
180 uint64_t is_v6:1;
181 uint64_t dec_ipsec:1;
182 uint64_t tcp_or_udp:1;
183 uint64_t dec_ipcomp:1;
184 uint64_t unassigned2:4;
185 uint64_t unassigned2a:4;
186 uint64_t pr:4;
187 uint64_t vlan_id:12;
188 uint64_t vlan_cfi:1;
189 uint64_t unassigned:1;
190 uint64_t vlan_stacked:1;
191 uint64_t vlan_valid:1;
192 uint64_t ip_offset:8;
193 uint64_t bufs:8;
194 #endif
195 } s;
196 struct {
197 #ifdef __BIG_ENDIAN_BITFIELD
198 uint64_t bufs:8;
199 uint64_t ip_offset:8;
200 uint64_t vlan_valid:1;
201 uint64_t vlan_stacked:1;
202 uint64_t unassigned:1;
203 uint64_t vlan_cfi:1;
204 uint64_t vlan_id:12;
205 uint64_t port:12; /* MAC/PIP port number. */
206 uint64_t dec_ipcomp:1;
207 uint64_t tcp_or_udp:1;
208 uint64_t dec_ipsec:1;
209 uint64_t is_v6:1;
210 uint64_t software:1;
211 uint64_t L4_error:1;
212 uint64_t is_frag:1;
213 uint64_t IP_exc:1;
214 uint64_t is_bcast:1;
215 uint64_t is_mcast:1;
216 uint64_t not_IP:1;
217 uint64_t rcv_error:1;
218 uint64_t err_code:8;
219 #else
220 uint64_t err_code:8;
221 uint64_t rcv_error:1;
222 uint64_t not_IP:1;
223 uint64_t is_mcast:1;
224 uint64_t is_bcast:1;
225 uint64_t IP_exc:1;
226 uint64_t is_frag:1;
227 uint64_t L4_error:1;
228 uint64_t software:1;
229 uint64_t is_v6:1;
230 uint64_t dec_ipsec:1;
231 uint64_t tcp_or_udp:1;
232 uint64_t dec_ipcomp:1;
233 uint64_t port:12;
234 uint64_t vlan_id:12;
235 uint64_t vlan_cfi:1;
236 uint64_t unassigned:1;
237 uint64_t vlan_stacked:1;
238 uint64_t vlan_valid:1;
239 uint64_t ip_offset:8;
240 uint64_t bufs:8;
241 #endif
242 } s_cn68xx;
243
244 /* use this to get at the 16 vlan bits */
245 struct {
246 #ifdef __BIG_ENDIAN_BITFIELD
247 uint64_t unused1:16;
248 uint64_t vlan:16;
249 uint64_t unused2:32;
250 #else
251 uint64_t unused2:32;
252 uint64_t vlan:16;
253 uint64_t unused1:16;
254
255 #endif
256 } svlan;
257
258 /*
259 * use this struct if the hardware could not determine that
260 * the packet is ip.
261 */
262 struct {
263 #ifdef __BIG_ENDIAN_BITFIELD
264 /*
265 * HW sets this to the number of buffers used by this
266 * packet.
267 */
268 uint64_t bufs:8;
269 uint64_t unused:8;
270 /* set to 1 if we found DSA/VLAN in the L2 */
271 uint64_t vlan_valid:1;
272 /* Set to 1 if the DSA/VLAN tag is stacked */
273 uint64_t vlan_stacked:1;
274 uint64_t unassigned:1;
275 /*
276 * HW sets to the DSA/VLAN CFI flag (valid when
277 * vlan_valid)
278 */
279 uint64_t vlan_cfi:1;
280 /*
281 * HW sets to the DSA/VLAN_ID field (valid when
282 * vlan_valid).
283 */
284 uint64_t vlan_id:12;
285 /*
286 * Ring Identifier (if PCIe). Requires
287 * PIP_GBL_CTL[RING_EN]=1
288 */
289 uint64_t pr:4;
290 uint64_t unassigned2:12;
291 /*
292 * reserved for software use, hardware will clear on
293 * packet creation.
294 */
295 uint64_t software:1;
296 uint64_t unassigned3:1;
297 /*
298 * set if the hardware determined that the packet is
299 * rarp.
300 */
301 uint64_t is_rarp:1;
302 /*
303 * set if the hardware determined that the packet is
304 * arp
305 */
306 uint64_t is_arp:1;
307 /*
308 * set if the hardware determined that the packet is a
309 * broadcast.
310 */
311 uint64_t is_bcast:1;
312 /*
313 * set if the hardware determined that the packet is a
314 * multi-cast
315 */
316 uint64_t is_mcast:1;
317 /*
318 * set if the packet may not be IP (must be one in
319 * this case)
320 */
321 uint64_t not_IP:1;
322 /* The receive interface hardware detected a receive
323 * error. Failure indicated in err_code below,
324 * decode:
325 *
326 * - 1 = partial error: a packet was partially
327 * received, but internal buffering / bandwidth
328 * was not adequate to receive the entire
329 * packet.
330 * - 2 = jabber error: the RGMII packet was too large
331 * and is truncated.
332 * - 3 = overrun error: the RGMII packet is longer
333 * than allowed and had an FCS error.
334 * - 4 = oversize error: the RGMII packet is longer
335 * than allowed.
336 * - 5 = alignment error: the RGMII packet is not an
337 * integer number of bytes
338 * and had an FCS error (100M and 10M only).
339 * - 6 = fragment error: the RGMII packet is shorter
340 * than allowed and had an FCS error.
341 * - 7 = GMX FCS error: the RGMII packet had an FCS
342 * error.
343 * - 8 = undersize error: the RGMII packet is shorter
344 * than allowed.
345 * - 9 = extend error: the RGMII packet had an extend
346 * error.
347 * - 10 = length mismatch error: the RGMII packet had
348 * a length that did not match the length field
349 * in the L2 HDR.
350 * - 11 = RGMII RX error/SPI4 DIP4 Error: the RGMII
351 * packet had one or more data reception errors
352 * (RXERR) or the SPI4 packet had one or more
353 * DIP4 errors.
354 * - 12 = RGMII skip error/SPI4 Abort Error: the RGMII
355 * packet was not large enough to cover the
356 * skipped bytes or the SPI4 packet was
357 * terminated with an About EOPS.
358 * - 13 = RGMII nibble error/SPI4 Port NXA Error: the
359 * RGMII packet had a studder error (data not
360 * repeated - 10/100M only) or the SPI4 packet
361 * was sent to an NXA.
362 * - 16 = FCS error: a SPI4.2 packet had an FCS error.
363 * - 17 = Skip error: a packet was not large enough to
364 * cover the skipped bytes.
365 * - 18 = L2 header malformed: the packet is not long
366 * enough to contain the L2.
367 */
368
369 uint64_t rcv_error:1;
370 /*
371 * lower err_code = first-level descriptor of the
372 * work
373 */
374 /*
375 * zero for packet submitted by hardware that isn't on
376 * the slow path
377 */
378 /* type is cvmx_pip_err_t (union, so can't use directly */
379 uint64_t err_code:8;
380 #else
381 uint64_t err_code:8;
382 uint64_t rcv_error:1;
383 uint64_t not_IP:1;
384 uint64_t is_mcast:1;
385 uint64_t is_bcast:1;
386 uint64_t is_arp:1;
387 uint64_t is_rarp:1;
388 uint64_t unassigned3:1;
389 uint64_t software:1;
390 uint64_t unassigned2:4;
391 uint64_t unassigned2a:8;
392 uint64_t pr:4;
393 uint64_t vlan_id:12;
394 uint64_t vlan_cfi:1;
395 uint64_t unassigned:1;
396 uint64_t vlan_stacked:1;
397 uint64_t vlan_valid:1;
398 uint64_t unused:8;
399 uint64_t bufs:8;
400 #endif
401 } snoip;
402
403 } cvmx_pip_wqe_word2;
404
405 union cvmx_pip_wqe_word0 {
406 struct {
407 #ifdef __BIG_ENDIAN_BITFIELD
408 /**
409 * raw chksum result generated by the HW
410 */
411 uint16_t hw_chksum;
412 /**
413 * Field unused by hardware - available for software
414 */
415 uint8_t unused;
416 /**
417 * Next pointer used by hardware for list maintenance.
418 * May be written/read by HW before the work queue
419 * entry is scheduled to a PP (Only 36 bits used in
420 * Octeon 1)
421 */
422 uint64_t next_ptr:40;
423 #else
424 uint64_t next_ptr:40;
425 uint8_t unused;
426 uint16_t hw_chksum;
427 #endif
428 } cn38xx;
429 struct {
430 #ifdef __BIG_ENDIAN_BITFIELD
431 uint64_t l4ptr:8; /* 56..63 */
432 uint64_t unused0:8; /* 48..55 */
433 uint64_t l3ptr:8; /* 40..47 */
434 uint64_t l2ptr:8; /* 32..39 */
435 uint64_t unused1:18; /* 14..31 */
436 uint64_t bpid:6; /* 8..13 */
437 uint64_t unused2:2; /* 6..7 */
438 uint64_t pknd:6; /* 0..5 */
439 #else
440 uint64_t pknd:6; /* 0..5 */
441 uint64_t unused2:2; /* 6..7 */
442 uint64_t bpid:6; /* 8..13 */
443 uint64_t unused1:18; /* 14..31 */
444 uint64_t l2ptr:8; /* 32..39 */
445 uint64_t l3ptr:8; /* 40..47 */
446 uint64_t unused0:8; /* 48..55 */
447 uint64_t l4ptr:8; /* 56..63 */
448 #endif
449 } cn68xx;
450 };
451
452 union cvmx_wqe_word0 {
453 uint64_t u64;
454 union cvmx_pip_wqe_word0 pip;
455 };
456
457 union cvmx_wqe_word1 {
458 uint64_t u64;
459 struct {
460 #ifdef __BIG_ENDIAN_BITFIELD
461 uint64_t len:16;
462 uint64_t varies:14;
463 /**
464 * the type of the tag (ORDERED, ATOMIC, NULL)
465 */
466 uint64_t tag_type:2;
467 uint64_t tag:32;
468 #else
469 uint64_t tag:32;
470 uint64_t tag_type:2;
471 uint64_t varies:14;
472 uint64_t len:16;
473 #endif
474 };
475 struct {
476 #ifdef __BIG_ENDIAN_BITFIELD
477 uint64_t len:16;
478 uint64_t zero_0:1;
479 /**
480 * HW sets this to what it thought the priority of
481 * the input packet was
482 */
483 uint64_t qos:3;
484
485 uint64_t zero_1:1;
486 /**
487 * the group that the work queue entry will be scheduled to
488 */
489 uint64_t grp:6;
490 uint64_t zero_2:3;
491 uint64_t tag_type:2;
492 uint64_t tag:32;
493 #else
494 uint64_t tag:32;
495 uint64_t tag_type:2;
496 uint64_t zero_2:3;
497 uint64_t grp:6;
498 uint64_t zero_1:1;
499 uint64_t qos:3;
500 uint64_t zero_0:1;
501 uint64_t len:16;
502 #endif
503 } cn68xx;
504 struct {
505 #ifdef __BIG_ENDIAN_BITFIELD
506 /**
507 * HW sets to the total number of bytes in the packet
508 */
509 uint64_t len:16;
510 /**
511 * HW sets this to input physical port
512 */
513 uint64_t ipprt:6;
514
515 /**
516 * HW sets this to what it thought the priority of
517 * the input packet was
518 */
519 uint64_t qos:3;
520
521 /**
522 * the group that the work queue entry will be scheduled to
523 */
524 uint64_t grp:4;
525 /**
526 * the type of the tag (ORDERED, ATOMIC, NULL)
527 */
528 uint64_t tag_type:3;
529 /**
530 * the synchronization/ordering tag
531 */
532 uint64_t tag:32;
533 #else
534 uint64_t tag:32;
535 uint64_t tag_type:2;
536 uint64_t zero_2:1;
537 uint64_t grp:4;
538 uint64_t qos:3;
539 uint64_t ipprt:6;
540 uint64_t len:16;
541 #endif
542 } cn38xx;
543 };
544
545 /**
546 * Work queue entry format
547 *
548 * must be 8-byte aligned
549 */
550 struct cvmx_wqe {
551
552 /*****************************************************************
553 * WORD 0
554 * HW WRITE: the following 64 bits are filled by HW when a packet arrives
555 */
556 union cvmx_wqe_word0 word0;
557
558 /*****************************************************************
559 * WORD 1
560 * HW WRITE: the following 64 bits are filled by HW when a packet arrives
561 */
562 union cvmx_wqe_word1 word1;
563
564 /**
565 * WORD 2 HW WRITE: the following 64-bits are filled in by
566 * hardware when a packet arrives This indicates a variety of
567 * status and error conditions.
568 */
569 cvmx_pip_wqe_word2 word2;
570
571 /**
572 * Pointer to the first segment of the packet.
573 */
574 union cvmx_buf_ptr packet_ptr;
575
576 /**
577 * HW WRITE: octeon will fill in a programmable amount from the
578 * packet, up to (at most, but perhaps less) the amount
579 * needed to fill the work queue entry to 128 bytes
580 *
581 * If the packet is recognized to be IP, the hardware starts
582 * (except that the IPv4 header is padded for appropriate
583 * alignment) writing here where the IP header starts. If the
584 * packet is not recognized to be IP, the hardware starts
585 * writing the beginning of the packet here.
586 */
587 uint8_t packet_data[96];
588
589 /**
590 * If desired, SW can make the work Q entry any length. For the
591 * purposes of discussion here, Assume 128B always, as this is all that
592 * the hardware deals with.
593 *
594 */
595
596 } CVMX_CACHE_LINE_ALIGNED;
597
598 static inline int cvmx_wqe_get_port(struct cvmx_wqe *work)
599 {
600 int port;
601
602 if (octeon_has_feature(OCTEON_FEATURE_CN68XX_WQE))
603 port = work->word2.s_cn68xx.port;
604 else
605 port = work->word1.cn38xx.ipprt;
606
607 return port;
608 }
609
610 static inline void cvmx_wqe_set_port(struct cvmx_wqe *work, int port)
611 {
612 if (octeon_has_feature(OCTEON_FEATURE_CN68XX_WQE))
613 work->word2.s_cn68xx.port = port;
614 else
615 work->word1.cn38xx.ipprt = port;
616 }
617
618 static inline int cvmx_wqe_get_grp(struct cvmx_wqe *work)
619 {
620 int grp;
621
622 if (octeon_has_feature(OCTEON_FEATURE_CN68XX_WQE))
623 grp = work->word1.cn68xx.grp;
624 else
625 grp = work->word1.cn38xx.grp;
626
627 return grp;
628 }
629
630 static inline void cvmx_wqe_set_grp(struct cvmx_wqe *work, int grp)
631 {
632 if (octeon_has_feature(OCTEON_FEATURE_CN68XX_WQE))
633 work->word1.cn68xx.grp = grp;
634 else
635 work->word1.cn38xx.grp = grp;
636 }
637
638 static inline int cvmx_wqe_get_qos(struct cvmx_wqe *work)
639 {
640 int qos;
641
642 if (octeon_has_feature(OCTEON_FEATURE_CN68XX_WQE))
643 qos = work->word1.cn68xx.qos;
644 else
645 qos = work->word1.cn38xx.qos;
646
647 return qos;
648 }
649
650 static inline void cvmx_wqe_set_qos(struct cvmx_wqe *work, int qos)
651 {
652 if (octeon_has_feature(OCTEON_FEATURE_CN68XX_WQE))
653 work->word1.cn68xx.qos = qos;
654 else
655 work->word1.cn38xx.qos = qos;
656 }
657
658 #endif /* __CVMX_WQE_H__ */
659
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