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77241056 | 1 | /* |
d4829ea6 | 2 | * Copyright(c) 2015-2017 Intel Corporation. |
77241056 MM |
3 | * |
4 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
5 | * redistributing this file, you may do so under either license. | |
6 | * | |
7 | * GPL LICENSE SUMMARY | |
8 | * | |
77241056 MM |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of version 2 of the GNU General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * BSD LICENSE | |
19 | * | |
77241056 MM |
20 | * Redistribution and use in source and binary forms, with or without |
21 | * modification, are permitted provided that the following conditions | |
22 | * are met: | |
23 | * | |
24 | * - Redistributions of source code must retain the above copyright | |
25 | * notice, this list of conditions and the following disclaimer. | |
26 | * - Redistributions in binary form must reproduce the above copyright | |
27 | * notice, this list of conditions and the following disclaimer in | |
28 | * the documentation and/or other materials provided with the | |
29 | * distribution. | |
30 | * - Neither the name of Intel Corporation nor the names of its | |
31 | * contributors may be used to endorse or promote products derived | |
32 | * from this software without specific prior written permission. | |
33 | * | |
34 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
35 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
36 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
37 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
38 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
39 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
40 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
41 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
42 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
43 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
44 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
45 | * | |
46 | */ | |
47 | ||
48 | #include <linux/spinlock.h> | |
49 | #include <linux/pci.h> | |
50 | #include <linux/io.h> | |
51 | #include <linux/delay.h> | |
52 | #include <linux/netdevice.h> | |
53 | #include <linux/vmalloc.h> | |
54 | #include <linux/module.h> | |
55 | #include <linux/prefetch.h> | |
8859b4a6 | 56 | #include <rdma/ib_verbs.h> |
77241056 MM |
57 | |
58 | #include "hfi.h" | |
59 | #include "trace.h" | |
60 | #include "qp.h" | |
61 | #include "sdma.h" | |
0181ce31 | 62 | #include "debugfs.h" |
d4829ea6 | 63 | #include "vnic.h" |
77241056 MM |
64 | |
65 | #undef pr_fmt | |
66 | #define pr_fmt(fmt) DRIVER_NAME ": " fmt | |
67 | ||
68 | /* | |
69 | * The size has to be longer than this string, so we can append | |
70 | * board/chip information to it in the initialization code. | |
71 | */ | |
72 | const char ib_hfi1_version[] = HFI1_DRIVER_VERSION "\n"; | |
73 | ||
74 | DEFINE_SPINLOCK(hfi1_devs_lock); | |
75 | LIST_HEAD(hfi1_dev_list); | |
76 | DEFINE_MUTEX(hfi1_mutex); /* general driver use */ | |
77 | ||
78 | unsigned int hfi1_max_mtu = HFI1_DEFAULT_MAX_MTU; | |
79 | module_param_named(max_mtu, hfi1_max_mtu, uint, S_IRUGO); | |
ef699e84 SS |
80 | MODULE_PARM_DESC(max_mtu, "Set max MTU bytes, default is " __stringify( |
81 | HFI1_DEFAULT_MAX_MTU)); | |
77241056 MM |
82 | |
83 | unsigned int hfi1_cu = 1; | |
84 | module_param_named(cu, hfi1_cu, uint, S_IRUGO); | |
85 | MODULE_PARM_DESC(cu, "Credit return units"); | |
86 | ||
87 | unsigned long hfi1_cap_mask = HFI1_CAP_MASK_DEFAULT; | |
88 | static int hfi1_caps_set(const char *, const struct kernel_param *); | |
89 | static int hfi1_caps_get(char *, const struct kernel_param *); | |
90 | static const struct kernel_param_ops cap_ops = { | |
91 | .set = hfi1_caps_set, | |
92 | .get = hfi1_caps_get | |
93 | }; | |
94 | module_param_cb(cap_mask, &cap_ops, &hfi1_cap_mask, S_IWUSR | S_IRUGO); | |
95 | MODULE_PARM_DESC(cap_mask, "Bit mask of enabled/disabled HW features"); | |
96 | ||
97 | MODULE_LICENSE("Dual BSD/GPL"); | |
98 | MODULE_DESCRIPTION("Intel Omni-Path Architecture driver"); | |
99 | MODULE_VERSION(HFI1_DRIVER_VERSION); | |
100 | ||
101 | /* | |
102 | * MAX_PKT_RCV is the max # if packets processed per receive interrupt. | |
103 | */ | |
104 | #define MAX_PKT_RECV 64 | |
a82a7fcd MM |
105 | /* |
106 | * MAX_PKT_THREAD_RCV is the max # of packets processed before | |
107 | * the qp_wait_list queue is flushed. | |
108 | */ | |
109 | #define MAX_PKT_RECV_THREAD (MAX_PKT_RECV * 4) | |
77241056 MM |
110 | #define EGR_HEAD_UPDATE_THRESHOLD 16 |
111 | ||
112 | struct hfi1_ib_stats hfi1_stats; | |
113 | ||
114 | static int hfi1_caps_set(const char *val, const struct kernel_param *kp) | |
115 | { | |
116 | int ret = 0; | |
117 | unsigned long *cap_mask_ptr = (unsigned long *)kp->arg, | |
118 | cap_mask = *cap_mask_ptr, value, diff, | |
119 | write_mask = ((HFI1_CAP_WRITABLE_MASK << HFI1_CAP_USER_SHIFT) | | |
120 | HFI1_CAP_WRITABLE_MASK); | |
121 | ||
122 | ret = kstrtoul(val, 0, &value); | |
123 | if (ret) { | |
124 | pr_warn("Invalid module parameter value for 'cap_mask'\n"); | |
125 | goto done; | |
126 | } | |
127 | /* Get the changed bits (except the locked bit) */ | |
128 | diff = value ^ (cap_mask & ~HFI1_CAP_LOCKED_SMASK); | |
129 | ||
130 | /* Remove any bits that are not allowed to change after driver load */ | |
131 | if (HFI1_CAP_LOCKED() && (diff & ~write_mask)) { | |
132 | pr_warn("Ignoring non-writable capability bits %#lx\n", | |
133 | diff & ~write_mask); | |
134 | diff &= write_mask; | |
135 | } | |
136 | ||
137 | /* Mask off any reserved bits */ | |
138 | diff &= ~HFI1_CAP_RESERVED_MASK; | |
139 | /* Clear any previously set and changing bits */ | |
140 | cap_mask &= ~diff; | |
141 | /* Update the bits with the new capability */ | |
142 | cap_mask |= (value & diff); | |
143 | /* Check for any kernel/user restrictions */ | |
144 | diff = (cap_mask & (HFI1_CAP_MUST_HAVE_KERN << HFI1_CAP_USER_SHIFT)) ^ | |
145 | ((cap_mask & HFI1_CAP_MUST_HAVE_KERN) << HFI1_CAP_USER_SHIFT); | |
146 | cap_mask &= ~diff; | |
147 | /* Set the bitmask to the final set */ | |
148 | *cap_mask_ptr = cap_mask; | |
149 | done: | |
150 | return ret; | |
151 | } | |
152 | ||
153 | static int hfi1_caps_get(char *buffer, const struct kernel_param *kp) | |
154 | { | |
155 | unsigned long cap_mask = *(unsigned long *)kp->arg; | |
156 | ||
157 | cap_mask &= ~HFI1_CAP_LOCKED_SMASK; | |
158 | cap_mask |= ((cap_mask & HFI1_CAP_K2U) << HFI1_CAP_USER_SHIFT); | |
159 | ||
160 | return scnprintf(buffer, PAGE_SIZE, "0x%lx", cap_mask); | |
161 | } | |
162 | ||
163 | const char *get_unit_name(int unit) | |
164 | { | |
165 | static char iname[16]; | |
166 | ||
9805071e | 167 | snprintf(iname, sizeof(iname), DRIVER_NAME "_%u", unit); |
77241056 MM |
168 | return iname; |
169 | } | |
170 | ||
49dbb6cf DD |
171 | const char *get_card_name(struct rvt_dev_info *rdi) |
172 | { | |
173 | struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi); | |
174 | struct hfi1_devdata *dd = container_of(ibdev, | |
175 | struct hfi1_devdata, verbs_dev); | |
176 | return get_unit_name(dd->unit); | |
177 | } | |
178 | ||
179 | struct pci_dev *get_pci_dev(struct rvt_dev_info *rdi) | |
180 | { | |
181 | struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi); | |
182 | struct hfi1_devdata *dd = container_of(ibdev, | |
183 | struct hfi1_devdata, verbs_dev); | |
184 | return dd->pcidev; | |
185 | } | |
186 | ||
77241056 MM |
187 | /* |
188 | * Return count of units with at least one port ACTIVE. | |
189 | */ | |
190 | int hfi1_count_active_units(void) | |
191 | { | |
192 | struct hfi1_devdata *dd; | |
193 | struct hfi1_pportdata *ppd; | |
194 | unsigned long flags; | |
195 | int pidx, nunits_active = 0; | |
196 | ||
197 | spin_lock_irqsave(&hfi1_devs_lock, flags); | |
198 | list_for_each_entry(dd, &hfi1_dev_list, list) { | |
199 | if (!(dd->flags & HFI1_PRESENT) || !dd->kregbase) | |
200 | continue; | |
201 | for (pidx = 0; pidx < dd->num_pports; ++pidx) { | |
202 | ppd = dd->pport + pidx; | |
203 | if (ppd->lid && ppd->linkup) { | |
204 | nunits_active++; | |
205 | break; | |
206 | } | |
207 | } | |
208 | } | |
209 | spin_unlock_irqrestore(&hfi1_devs_lock, flags); | |
210 | return nunits_active; | |
211 | } | |
212 | ||
213 | /* | |
214 | * Return count of all units, optionally return in arguments | |
215 | * the number of usable (present) units, and the number of | |
216 | * ports that are up. | |
217 | */ | |
218 | int hfi1_count_units(int *npresentp, int *nupp) | |
219 | { | |
220 | int nunits = 0, npresent = 0, nup = 0; | |
221 | struct hfi1_devdata *dd; | |
222 | unsigned long flags; | |
223 | int pidx; | |
224 | struct hfi1_pportdata *ppd; | |
225 | ||
226 | spin_lock_irqsave(&hfi1_devs_lock, flags); | |
227 | ||
228 | list_for_each_entry(dd, &hfi1_dev_list, list) { | |
229 | nunits++; | |
230 | if ((dd->flags & HFI1_PRESENT) && dd->kregbase) | |
231 | npresent++; | |
232 | for (pidx = 0; pidx < dd->num_pports; ++pidx) { | |
233 | ppd = dd->pport + pidx; | |
234 | if (ppd->lid && ppd->linkup) | |
235 | nup++; | |
236 | } | |
237 | } | |
238 | ||
239 | spin_unlock_irqrestore(&hfi1_devs_lock, flags); | |
240 | ||
241 | if (npresentp) | |
242 | *npresentp = npresent; | |
243 | if (nupp) | |
244 | *nupp = nup; | |
245 | ||
246 | return nunits; | |
247 | } | |
248 | ||
249 | /* | |
250 | * Get address of eager buffer from it's index (allocated in chunks, not | |
251 | * contiguous). | |
252 | */ | |
253 | static inline void *get_egrbuf(const struct hfi1_ctxtdata *rcd, u64 rhf, | |
254 | u8 *update) | |
255 | { | |
256 | u32 idx = rhf_egr_index(rhf), offset = rhf_egr_buf_offset(rhf); | |
257 | ||
258 | *update |= !(idx & (rcd->egrbufs.threshold - 1)) && !offset; | |
259 | return (void *)(((u64)(rcd->egrbufs.rcvtids[idx].addr)) + | |
260 | (offset * RCV_BUF_BLOCK_SIZE)); | |
261 | } | |
262 | ||
263 | /* | |
264 | * Validate and encode the a given RcvArray Buffer size. | |
265 | * The function will check whether the given size falls within | |
266 | * allowed size ranges for the respective type and, optionally, | |
267 | * return the proper encoding. | |
268 | */ | |
a82a7fcd | 269 | int hfi1_rcvbuf_validate(u32 size, u8 type, u16 *encoded) |
77241056 | 270 | { |
f5389660 | 271 | if (unlikely(!PAGE_ALIGNED(size))) |
77241056 MM |
272 | return 0; |
273 | if (unlikely(size < MIN_EAGER_BUFFER)) | |
274 | return 0; | |
275 | if (size > | |
276 | (type == PT_EAGER ? MAX_EAGER_BUFFER : MAX_EXPECTED_BUFFER)) | |
277 | return 0; | |
278 | if (encoded) | |
279 | *encoded = ilog2(size / PAGE_SIZE) + 1; | |
280 | return 1; | |
281 | } | |
282 | ||
283 | static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd, | |
284 | struct hfi1_packet *packet) | |
285 | { | |
261a4351 | 286 | struct ib_header *rhdr = packet->hdr; |
77241056 | 287 | u32 rte = rhf_rcv_type_err(packet->rhf); |
cb427057 | 288 | int lnh = ib_get_lnh(rhdr); |
f3e862cb | 289 | struct hfi1_ibport *ibp = rcd_to_iport(rcd); |
ec4274f1 DD |
290 | struct hfi1_devdata *dd = ppd->dd; |
291 | struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; | |
77241056 MM |
292 | |
293 | if (packet->rhf & (RHF_VCRC_ERR | RHF_ICRC_ERR)) | |
294 | return; | |
295 | ||
296 | if (packet->rhf & RHF_TID_ERR) { | |
297 | /* For TIDERR and RC QPs preemptively schedule a NAK */ | |
261a4351 | 298 | struct ib_other_headers *ohdr = NULL; |
77241056 | 299 | u32 tlen = rhf_pkt_len(packet->rhf); /* in bytes */ |
cb427057 | 300 | u16 lid = ib_get_dlid(rhdr); |
77241056 MM |
301 | u32 qp_num; |
302 | u32 rcv_flags = 0; | |
303 | ||
304 | /* Sanity check packet */ | |
305 | if (tlen < 24) | |
306 | goto drop; | |
307 | ||
308 | /* Check for GRH */ | |
e490974e | 309 | if (lnh == HFI1_LRH_BTH) { |
261a4351 | 310 | ohdr = &rhdr->u.oth; |
e490974e | 311 | } else if (lnh == HFI1_LRH_GRH) { |
77241056 MM |
312 | u32 vtf; |
313 | ||
261a4351 MM |
314 | ohdr = &rhdr->u.l.oth; |
315 | if (rhdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR) | |
77241056 | 316 | goto drop; |
261a4351 | 317 | vtf = be32_to_cpu(rhdr->u.l.grh.version_tclass_flow); |
77241056 MM |
318 | if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION) |
319 | goto drop; | |
320 | rcv_flags |= HFI1_HAS_GRH; | |
e490974e | 321 | } else { |
77241056 | 322 | goto drop; |
e490974e | 323 | } |
77241056 | 324 | /* Get the destination QP number. */ |
ec4274f1 | 325 | qp_num = be32_to_cpu(ohdr->bth[1]) & RVT_QPN_MASK; |
8859b4a6 | 326 | if (lid < be16_to_cpu(IB_MULTICAST_LID_BASE)) { |
895420dd | 327 | struct rvt_qp *qp; |
b77d713a | 328 | unsigned long flags; |
77241056 MM |
329 | |
330 | rcu_read_lock(); | |
ec4274f1 | 331 | qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num); |
77241056 MM |
332 | if (!qp) { |
333 | rcu_read_unlock(); | |
334 | goto drop; | |
335 | } | |
336 | ||
337 | /* | |
338 | * Handle only RC QPs - for other QP types drop error | |
339 | * packet. | |
340 | */ | |
b77d713a | 341 | spin_lock_irqsave(&qp->r_lock, flags); |
77241056 MM |
342 | |
343 | /* Check for valid receive state. */ | |
83693bd1 DD |
344 | if (!(ib_rvt_state_ops[qp->state] & |
345 | RVT_PROCESS_RECV_OK)) { | |
4eb06882 | 346 | ibp->rvp.n_pkt_drops++; |
77241056 MM |
347 | } |
348 | ||
349 | switch (qp->ibqp.qp_type) { | |
350 | case IB_QPT_RC: | |
351 | hfi1_rc_hdrerr( | |
352 | rcd, | |
261a4351 | 353 | rhdr, |
77241056 MM |
354 | rcv_flags, |
355 | qp); | |
356 | break; | |
357 | default: | |
358 | /* For now don't handle any other QP types */ | |
359 | break; | |
360 | } | |
361 | ||
b77d713a | 362 | spin_unlock_irqrestore(&qp->r_lock, flags); |
77241056 MM |
363 | rcu_read_unlock(); |
364 | } /* Unicast QP */ | |
365 | } /* Valid packet with TIDErr */ | |
366 | ||
367 | /* handle "RcvTypeErr" flags */ | |
368 | switch (rte) { | |
369 | case RHF_RTE_ERROR_OP_CODE_ERR: | |
370 | { | |
371 | u32 opcode; | |
372 | void *ebuf = NULL; | |
373 | __be32 *bth = NULL; | |
374 | ||
375 | if (rhf_use_egr_bfr(packet->rhf)) | |
376 | ebuf = packet->ebuf; | |
377 | ||
d125a6c6 | 378 | if (!ebuf) |
77241056 MM |
379 | goto drop; /* this should never happen */ |
380 | ||
381 | if (lnh == HFI1_LRH_BTH) | |
382 | bth = (__be32 *)ebuf; | |
383 | else if (lnh == HFI1_LRH_GRH) | |
384 | bth = (__be32 *)((char *)ebuf + sizeof(struct ib_grh)); | |
385 | else | |
386 | goto drop; | |
387 | ||
388 | opcode = be32_to_cpu(bth[0]) >> 24; | |
389 | opcode &= 0xff; | |
390 | ||
391 | if (opcode == IB_OPCODE_CNP) { | |
392 | /* | |
393 | * Only in pre-B0 h/w is the CNP_OPCODE handled | |
80e4898e | 394 | * via this code path. |
77241056 | 395 | */ |
895420dd | 396 | struct rvt_qp *qp = NULL; |
77241056 MM |
397 | u32 lqpn, rqpn; |
398 | u16 rlid; | |
399 | u8 svc_type, sl, sc5; | |
400 | ||
aad559c2 | 401 | sc5 = hfi1_9B_get_sc5(rhdr, packet->rhf); |
77241056 MM |
402 | sl = ibp->sc_to_sl[sc5]; |
403 | ||
ec4274f1 | 404 | lqpn = be32_to_cpu(bth[1]) & RVT_QPN_MASK; |
77241056 | 405 | rcu_read_lock(); |
ec4274f1 | 406 | qp = rvt_lookup_qpn(rdi, &ibp->rvp, lqpn); |
d125a6c6 | 407 | if (!qp) { |
77241056 MM |
408 | rcu_read_unlock(); |
409 | goto drop; | |
410 | } | |
411 | ||
412 | switch (qp->ibqp.qp_type) { | |
413 | case IB_QPT_UD: | |
414 | rlid = 0; | |
415 | rqpn = 0; | |
416 | svc_type = IB_CC_SVCTYPE_UD; | |
417 | break; | |
418 | case IB_QPT_UC: | |
cb427057 | 419 | rlid = ib_get_slid(rhdr); |
77241056 MM |
420 | rqpn = qp->remote_qpn; |
421 | svc_type = IB_CC_SVCTYPE_UC; | |
422 | break; | |
423 | default: | |
424 | goto drop; | |
425 | } | |
426 | ||
427 | process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type); | |
428 | rcu_read_unlock(); | |
429 | } | |
430 | ||
431 | packet->rhf &= ~RHF_RCV_TYPE_ERR_SMASK; | |
432 | break; | |
433 | } | |
434 | default: | |
435 | break; | |
436 | } | |
437 | ||
438 | drop: | |
439 | return; | |
440 | } | |
441 | ||
442 | static inline void init_packet(struct hfi1_ctxtdata *rcd, | |
17fb4f29 | 443 | struct hfi1_packet *packet) |
77241056 | 444 | { |
77241056 MM |
445 | packet->rsize = rcd->rcvhdrqentsize; /* words */ |
446 | packet->maxcnt = rcd->rcvhdrq_cnt * packet->rsize; /* words */ | |
447 | packet->rcd = rcd; | |
448 | packet->updegr = 0; | |
449 | packet->etail = -1; | |
f4f30031 | 450 | packet->rhf_addr = get_rhf_addr(rcd); |
77241056 MM |
451 | packet->rhf = rhf_to_cpu(packet->rhf_addr); |
452 | packet->rhqoff = rcd->head; | |
453 | packet->numpkt = 0; | |
454 | packet->rcv_flags = 0; | |
455 | } | |
456 | ||
5fd2b562 MH |
457 | void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt, |
458 | bool do_cnp) | |
77241056 MM |
459 | { |
460 | struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); | |
261a4351 MM |
461 | struct ib_header *hdr = pkt->hdr; |
462 | struct ib_other_headers *ohdr = pkt->ohdr; | |
5fd2b562 MH |
463 | struct ib_grh *grh = NULL; |
464 | u32 rqpn = 0, bth1; | |
cb427057 | 465 | u16 rlid, dlid = ib_get_dlid(hdr); |
5fd2b562 MH |
466 | u8 sc, svc_type; |
467 | bool is_mcast = false; | |
468 | ||
469 | if (pkt->rcv_flags & HFI1_HAS_GRH) | |
470 | grh = &hdr->u.l.grh; | |
77241056 MM |
471 | |
472 | switch (qp->ibqp.qp_type) { | |
977940b8 AK |
473 | case IB_QPT_SMI: |
474 | case IB_QPT_GSI: | |
77241056 | 475 | case IB_QPT_UD: |
cb427057 | 476 | rlid = ib_get_slid(hdr); |
ec4274f1 | 477 | rqpn = be32_to_cpu(ohdr->u.ud.deth[1]) & RVT_QPN_MASK; |
77241056 | 478 | svc_type = IB_CC_SVCTYPE_UD; |
5fd2b562 MH |
479 | is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) && |
480 | (dlid != be16_to_cpu(IB_LID_PERMISSIVE)); | |
77241056 | 481 | break; |
977940b8 | 482 | case IB_QPT_UC: |
d8966fcd | 483 | rlid = rdma_ah_get_dlid(&qp->remote_ah_attr); |
977940b8 AK |
484 | rqpn = qp->remote_qpn; |
485 | svc_type = IB_CC_SVCTYPE_UC; | |
486 | break; | |
487 | case IB_QPT_RC: | |
d8966fcd | 488 | rlid = rdma_ah_get_dlid(&qp->remote_ah_attr); |
977940b8 AK |
489 | rqpn = qp->remote_qpn; |
490 | svc_type = IB_CC_SVCTYPE_RC; | |
491 | break; | |
77241056 MM |
492 | default: |
493 | return; | |
494 | } | |
495 | ||
aad559c2 | 496 | sc = hfi1_9B_get_sc5(hdr, pkt->rhf); |
77241056 | 497 | |
5fd2b562 | 498 | bth1 = be32_to_cpu(ohdr->bth[1]); |
3d591099 | 499 | if (do_cnp && (bth1 & IB_FECN_SMASK)) { |
77241056 | 500 | u16 pkey = (u16)be32_to_cpu(ohdr->bth[0]); |
77241056 | 501 | |
5fd2b562 | 502 | return_cnp(ibp, qp, rqpn, pkey, dlid, rlid, sc, grh); |
77241056 MM |
503 | } |
504 | ||
3d591099 | 505 | if (!is_mcast && (bth1 & IB_BECN_SMASK)) { |
77241056 | 506 | struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); |
ec4274f1 | 507 | u32 lqpn = bth1 & RVT_QPN_MASK; |
5fd2b562 | 508 | u8 sl = ibp->sc_to_sl[sc]; |
77241056 | 509 | |
977940b8 | 510 | process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type); |
77241056 | 511 | } |
5fd2b562 | 512 | |
77241056 MM |
513 | } |
514 | ||
515 | struct ps_mdata { | |
516 | struct hfi1_ctxtdata *rcd; | |
517 | u32 rsize; | |
518 | u32 maxcnt; | |
519 | u32 ps_head; | |
520 | u32 ps_tail; | |
521 | u32 ps_seq; | |
522 | }; | |
523 | ||
524 | static inline void init_ps_mdata(struct ps_mdata *mdata, | |
525 | struct hfi1_packet *packet) | |
526 | { | |
527 | struct hfi1_ctxtdata *rcd = packet->rcd; | |
528 | ||
529 | mdata->rcd = rcd; | |
530 | mdata->rsize = packet->rsize; | |
531 | mdata->maxcnt = packet->maxcnt; | |
3e7ccca0 | 532 | mdata->ps_head = packet->rhqoff; |
77241056 | 533 | |
82c2611d | 534 | if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { |
3e7ccca0 | 535 | mdata->ps_tail = get_rcvhdrtail(rcd); |
82c2611d NV |
536 | if (rcd->ctxt == HFI1_CTRL_CTXT) |
537 | mdata->ps_seq = rcd->seq_cnt; | |
538 | else | |
539 | mdata->ps_seq = 0; /* not used with DMA_RTAIL */ | |
77241056 MM |
540 | } else { |
541 | mdata->ps_tail = 0; /* used only with DMA_RTAIL*/ | |
542 | mdata->ps_seq = rcd->seq_cnt; | |
543 | } | |
544 | } | |
545 | ||
82c2611d NV |
546 | static inline int ps_done(struct ps_mdata *mdata, u64 rhf, |
547 | struct hfi1_ctxtdata *rcd) | |
77241056 | 548 | { |
82c2611d | 549 | if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) |
77241056 MM |
550 | return mdata->ps_head == mdata->ps_tail; |
551 | return mdata->ps_seq != rhf_rcv_seq(rhf); | |
552 | } | |
553 | ||
82c2611d NV |
554 | static inline int ps_skip(struct ps_mdata *mdata, u64 rhf, |
555 | struct hfi1_ctxtdata *rcd) | |
556 | { | |
557 | /* | |
558 | * Control context can potentially receive an invalid rhf. | |
559 | * Drop such packets. | |
560 | */ | |
561 | if ((rcd->ctxt == HFI1_CTRL_CTXT) && (mdata->ps_head != mdata->ps_tail)) | |
562 | return mdata->ps_seq != rhf_rcv_seq(rhf); | |
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
567 | static inline void update_ps_mdata(struct ps_mdata *mdata, | |
568 | struct hfi1_ctxtdata *rcd) | |
77241056 | 569 | { |
77241056 | 570 | mdata->ps_head += mdata->rsize; |
3e7ccca0 | 571 | if (mdata->ps_head >= mdata->maxcnt) |
77241056 | 572 | mdata->ps_head = 0; |
82c2611d NV |
573 | |
574 | /* Control context must do seq counting */ | |
575 | if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL) || | |
576 | (rcd->ctxt == HFI1_CTRL_CTXT)) { | |
77241056 MM |
577 | if (++mdata->ps_seq > 13) |
578 | mdata->ps_seq = 1; | |
579 | } | |
580 | } | |
581 | ||
582 | /* | |
583 | * prescan_rxq - search through the receive queue looking for packets | |
584 | * containing Excplicit Congestion Notifications (FECNs, or BECNs). | |
585 | * When an ECN is found, process the Congestion Notification, and toggle | |
586 | * it off. | |
6c9e50f8 VM |
587 | * This is declared as a macro to allow quick checking of the port to avoid |
588 | * the overhead of a function call if not enabled. | |
77241056 | 589 | */ |
6c9e50f8 VM |
590 | #define prescan_rxq(rcd, packet) \ |
591 | do { \ | |
592 | if (rcd->ppd->cc_prescan) \ | |
593 | __prescan_rxq(packet); \ | |
594 | } while (0) | |
595 | static void __prescan_rxq(struct hfi1_packet *packet) | |
77241056 MM |
596 | { |
597 | struct hfi1_ctxtdata *rcd = packet->rcd; | |
598 | struct ps_mdata mdata; | |
599 | ||
77241056 MM |
600 | init_ps_mdata(&mdata, packet); |
601 | ||
602 | while (1) { | |
603 | struct hfi1_devdata *dd = rcd->dd; | |
f3e862cb | 604 | struct hfi1_ibport *ibp = rcd_to_iport(rcd); |
50e5dcbe | 605 | __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head + |
77241056 | 606 | dd->rhf_offset; |
895420dd | 607 | struct rvt_qp *qp; |
261a4351 | 608 | struct ib_header *hdr; |
ec4274f1 | 609 | struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; |
77241056 | 610 | u64 rhf = rhf_to_cpu(rhf_addr); |
977940b8 | 611 | u32 etype = rhf_rcv_type(rhf), qpn, bth1; |
77241056 MM |
612 | int is_ecn = 0; |
613 | u8 lnh; | |
614 | ||
82c2611d | 615 | if (ps_done(&mdata, rhf, rcd)) |
77241056 MM |
616 | break; |
617 | ||
82c2611d NV |
618 | if (ps_skip(&mdata, rhf, rcd)) |
619 | goto next; | |
620 | ||
77241056 MM |
621 | if (etype != RHF_RCV_TYPE_IB) |
622 | goto next; | |
623 | ||
f2d8a0b3 DC |
624 | packet->hdr = hfi1_get_msgheader(dd, rhf_addr); |
625 | hdr = packet->hdr; | |
cb427057 | 626 | lnh = ib_get_lnh(hdr); |
77241056 | 627 | |
f2d8a0b3 DC |
628 | if (lnh == HFI1_LRH_BTH) { |
629 | packet->ohdr = &hdr->u.oth; | |
630 | } else if (lnh == HFI1_LRH_GRH) { | |
631 | packet->ohdr = &hdr->u.l.oth; | |
632 | packet->rcv_flags |= HFI1_HAS_GRH; | |
633 | } else { | |
77241056 | 634 | goto next; /* just in case */ |
f2d8a0b3 | 635 | } |
5fd2b562 | 636 | |
f2d8a0b3 | 637 | bth1 = be32_to_cpu(packet->ohdr->bth[1]); |
3d591099 | 638 | is_ecn = !!(bth1 & (IB_FECN_SMASK | IB_BECN_SMASK)); |
77241056 MM |
639 | |
640 | if (!is_ecn) | |
641 | goto next; | |
642 | ||
ec4274f1 | 643 | qpn = bth1 & RVT_QPN_MASK; |
77241056 | 644 | rcu_read_lock(); |
ec4274f1 | 645 | qp = rvt_lookup_qpn(rdi, &ibp->rvp, qpn); |
77241056 | 646 | |
d125a6c6 | 647 | if (!qp) { |
77241056 MM |
648 | rcu_read_unlock(); |
649 | goto next; | |
650 | } | |
651 | ||
5fd2b562 | 652 | process_ecn(qp, packet, true); |
77241056 | 653 | rcu_read_unlock(); |
977940b8 AK |
654 | |
655 | /* turn off BECN, FECN */ | |
3d591099 | 656 | bth1 &= ~(IB_FECN_SMASK | IB_BECN_SMASK); |
f2d8a0b3 | 657 | packet->ohdr->bth[1] = cpu_to_be32(bth1); |
77241056 | 658 | next: |
82c2611d | 659 | update_ps_mdata(&mdata, rcd); |
77241056 MM |
660 | } |
661 | } | |
82c2611d | 662 | |
a82a7fcd MM |
663 | static void process_rcv_qp_work(struct hfi1_ctxtdata *rcd) |
664 | { | |
665 | struct rvt_qp *qp, *nqp; | |
666 | ||
667 | /* | |
668 | * Iterate over all QPs waiting to respond. | |
669 | * The list won't change since the IRQ is only run on one CPU. | |
670 | */ | |
671 | list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) { | |
672 | list_del_init(&qp->rspwait); | |
673 | if (qp->r_flags & RVT_R_RSP_NAK) { | |
674 | qp->r_flags &= ~RVT_R_RSP_NAK; | |
675 | hfi1_send_rc_ack(rcd, qp, 0); | |
676 | } | |
677 | if (qp->r_flags & RVT_R_RSP_SEND) { | |
678 | unsigned long flags; | |
679 | ||
680 | qp->r_flags &= ~RVT_R_RSP_SEND; | |
681 | spin_lock_irqsave(&qp->s_lock, flags); | |
682 | if (ib_rvt_state_ops[qp->state] & | |
683 | RVT_PROCESS_OR_FLUSH_SEND) | |
684 | hfi1_schedule_send(qp); | |
685 | spin_unlock_irqrestore(&qp->s_lock, flags); | |
686 | } | |
687 | rvt_put_qp(qp); | |
688 | } | |
689 | } | |
690 | ||
691 | static noinline int max_packet_exceeded(struct hfi1_packet *packet, int thread) | |
692 | { | |
693 | if (thread) { | |
694 | if ((packet->numpkt & (MAX_PKT_RECV_THREAD - 1)) == 0) | |
695 | /* allow defered processing */ | |
696 | process_rcv_qp_work(packet->rcd); | |
697 | cond_resched(); | |
698 | return RCV_PKT_OK; | |
699 | } else { | |
700 | this_cpu_inc(*packet->rcd->dd->rcv_limit); | |
701 | return RCV_PKT_LIMIT; | |
702 | } | |
703 | } | |
704 | ||
705 | static inline int check_max_packet(struct hfi1_packet *packet, int thread) | |
82c2611d NV |
706 | { |
707 | int ret = RCV_PKT_OK; | |
708 | ||
a82a7fcd MM |
709 | if (unlikely((packet->numpkt & (MAX_PKT_RECV - 1)) == 0)) |
710 | ret = max_packet_exceeded(packet, thread); | |
711 | return ret; | |
712 | } | |
713 | ||
714 | static noinline int skip_rcv_packet(struct hfi1_packet *packet, int thread) | |
715 | { | |
716 | int ret; | |
717 | ||
82c2611d NV |
718 | /* Set up for the next packet */ |
719 | packet->rhqoff += packet->rsize; | |
720 | if (packet->rhqoff >= packet->maxcnt) | |
721 | packet->rhqoff = 0; | |
722 | ||
723 | packet->numpkt++; | |
a82a7fcd | 724 | ret = check_max_packet(packet, thread); |
82c2611d NV |
725 | |
726 | packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff + | |
727 | packet->rcd->dd->rhf_offset; | |
728 | packet->rhf = rhf_to_cpu(packet->rhf_addr); | |
729 | ||
730 | return ret; | |
731 | } | |
77241056 | 732 | |
f4f30031 | 733 | static inline int process_rcv_packet(struct hfi1_packet *packet, int thread) |
77241056 | 734 | { |
a82a7fcd | 735 | int ret; |
77241056 MM |
736 | |
737 | packet->hdr = hfi1_get_msgheader(packet->rcd->dd, | |
738 | packet->rhf_addr); | |
739 | packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr; | |
740 | packet->etype = rhf_rcv_type(packet->rhf); | |
741 | /* total length */ | |
742 | packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */ | |
743 | /* retrieve eager buffer details */ | |
744 | packet->ebuf = NULL; | |
745 | if (rhf_use_egr_bfr(packet->rhf)) { | |
746 | packet->etail = rhf_egr_index(packet->rhf); | |
747 | packet->ebuf = get_egrbuf(packet->rcd, packet->rhf, | |
748 | &packet->updegr); | |
749 | /* | |
750 | * Prefetch the contents of the eager buffer. It is | |
751 | * OK to send a negative length to prefetch_range(). | |
752 | * The +2 is the size of the RHF. | |
753 | */ | |
754 | prefetch_range(packet->ebuf, | |
17fb4f29 JJ |
755 | packet->tlen - ((packet->rcd->rcvhdrqentsize - |
756 | (rhf_hdrq_offset(packet->rhf) | |
757 | + 2)) * 4)); | |
77241056 MM |
758 | } |
759 | ||
760 | /* | |
761 | * Call a type specific handler for the packet. We | |
762 | * should be able to trust that etype won't be beyond | |
763 | * the range of valid indexes. If so something is really | |
764 | * wrong and we can probably just let things come | |
765 | * crashing down. There is no need to eat another | |
766 | * comparison in this performance critical code. | |
767 | */ | |
768 | packet->rcd->dd->rhf_rcv_function_map[packet->etype](packet); | |
769 | packet->numpkt++; | |
770 | ||
771 | /* Set up for the next packet */ | |
772 | packet->rhqoff += packet->rsize; | |
773 | if (packet->rhqoff >= packet->maxcnt) | |
774 | packet->rhqoff = 0; | |
775 | ||
a82a7fcd | 776 | ret = check_max_packet(packet, thread); |
77241056 | 777 | |
50e5dcbe | 778 | packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff + |
77241056 MM |
779 | packet->rcd->dd->rhf_offset; |
780 | packet->rhf = rhf_to_cpu(packet->rhf_addr); | |
781 | ||
782 | return ret; | |
783 | } | |
784 | ||
785 | static inline void process_rcv_update(int last, struct hfi1_packet *packet) | |
786 | { | |
787 | /* | |
788 | * Update head regs etc., every 16 packets, if not last pkt, | |
789 | * to help prevent rcvhdrq overflows, when many packets | |
790 | * are processed and queue is nearly full. | |
791 | * Don't request an interrupt for intermediate updates. | |
792 | */ | |
793 | if (!last && !(packet->numpkt & 0xf)) { | |
794 | update_usrhead(packet->rcd, packet->rhqoff, packet->updegr, | |
795 | packet->etail, 0, 0); | |
796 | packet->updegr = 0; | |
797 | } | |
798 | packet->rcv_flags = 0; | |
799 | } | |
800 | ||
801 | static inline void finish_packet(struct hfi1_packet *packet) | |
802 | { | |
77241056 MM |
803 | /* |
804 | * Nothing we need to free for the packet. | |
805 | * | |
806 | * The only thing we need to do is a final update and call for an | |
807 | * interrupt | |
808 | */ | |
809 | update_usrhead(packet->rcd, packet->rcd->head, packet->updegr, | |
810 | packet->etail, rcv_intr_dynamic, packet->numpkt); | |
77241056 MM |
811 | } |
812 | ||
77241056 MM |
813 | /* |
814 | * Handle receive interrupts when using the no dma rtail option. | |
815 | */ | |
f4f30031 | 816 | int handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd, int thread) |
77241056 MM |
817 | { |
818 | u32 seq; | |
f4f30031 | 819 | int last = RCV_PKT_OK; |
77241056 MM |
820 | struct hfi1_packet packet; |
821 | ||
822 | init_packet(rcd, &packet); | |
823 | seq = rhf_rcv_seq(packet.rhf); | |
f4f30031 DL |
824 | if (seq != rcd->seq_cnt) { |
825 | last = RCV_PKT_DONE; | |
77241056 | 826 | goto bail; |
f4f30031 | 827 | } |
77241056 | 828 | |
6c9e50f8 | 829 | prescan_rxq(rcd, &packet); |
77241056 | 830 | |
f4f30031 DL |
831 | while (last == RCV_PKT_OK) { |
832 | last = process_rcv_packet(&packet, thread); | |
77241056 MM |
833 | seq = rhf_rcv_seq(packet.rhf); |
834 | if (++rcd->seq_cnt > 13) | |
835 | rcd->seq_cnt = 1; | |
836 | if (seq != rcd->seq_cnt) | |
f4f30031 | 837 | last = RCV_PKT_DONE; |
77241056 MM |
838 | process_rcv_update(last, &packet); |
839 | } | |
a82a7fcd MM |
840 | process_rcv_qp_work(rcd); |
841 | rcd->head = packet.rhqoff; | |
77241056 MM |
842 | bail: |
843 | finish_packet(&packet); | |
f4f30031 | 844 | return last; |
77241056 MM |
845 | } |
846 | ||
f4f30031 | 847 | int handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd, int thread) |
77241056 MM |
848 | { |
849 | u32 hdrqtail; | |
f4f30031 | 850 | int last = RCV_PKT_OK; |
77241056 MM |
851 | struct hfi1_packet packet; |
852 | ||
853 | init_packet(rcd, &packet); | |
854 | hdrqtail = get_rcvhdrtail(rcd); | |
f4f30031 DL |
855 | if (packet.rhqoff == hdrqtail) { |
856 | last = RCV_PKT_DONE; | |
77241056 | 857 | goto bail; |
f4f30031 | 858 | } |
77241056 MM |
859 | smp_rmb(); /* prevent speculative reads of dma'ed hdrq */ |
860 | ||
6c9e50f8 | 861 | prescan_rxq(rcd, &packet); |
77241056 | 862 | |
f4f30031 DL |
863 | while (last == RCV_PKT_OK) { |
864 | last = process_rcv_packet(&packet, thread); | |
77241056 | 865 | if (packet.rhqoff == hdrqtail) |
f4f30031 | 866 | last = RCV_PKT_DONE; |
77241056 MM |
867 | process_rcv_update(last, &packet); |
868 | } | |
a82a7fcd MM |
869 | process_rcv_qp_work(rcd); |
870 | rcd->head = packet.rhqoff; | |
77241056 MM |
871 | bail: |
872 | finish_packet(&packet); | |
f4f30031 | 873 | return last; |
77241056 MM |
874 | } |
875 | ||
2280740f | 876 | static inline void set_nodma_rtail(struct hfi1_devdata *dd, u8 ctxt) |
77241056 MM |
877 | { |
878 | int i; | |
879 | ||
2280740f VN |
880 | /* |
881 | * For dynamically allocated kernel contexts (like vnic) switch | |
882 | * interrupt handler only for that context. Otherwise, switch | |
883 | * interrupt handler for all statically allocated kernel contexts. | |
884 | */ | |
885 | if (ctxt >= dd->first_dyn_alloc_ctxt) { | |
886 | dd->rcd[ctxt]->do_interrupt = | |
887 | &handle_receive_interrupt_nodma_rtail; | |
888 | return; | |
889 | } | |
890 | ||
891 | for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) | |
77241056 MM |
892 | dd->rcd[i]->do_interrupt = |
893 | &handle_receive_interrupt_nodma_rtail; | |
894 | } | |
895 | ||
2280740f | 896 | static inline void set_dma_rtail(struct hfi1_devdata *dd, u8 ctxt) |
77241056 MM |
897 | { |
898 | int i; | |
899 | ||
2280740f VN |
900 | /* |
901 | * For dynamically allocated kernel contexts (like vnic) switch | |
902 | * interrupt handler only for that context. Otherwise, switch | |
903 | * interrupt handler for all statically allocated kernel contexts. | |
904 | */ | |
905 | if (ctxt >= dd->first_dyn_alloc_ctxt) { | |
906 | dd->rcd[ctxt]->do_interrupt = | |
907 | &handle_receive_interrupt_dma_rtail; | |
908 | return; | |
909 | } | |
910 | ||
911 | for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) | |
77241056 MM |
912 | dd->rcd[i]->do_interrupt = |
913 | &handle_receive_interrupt_dma_rtail; | |
914 | } | |
915 | ||
fb9036dd JS |
916 | void set_all_slowpath(struct hfi1_devdata *dd) |
917 | { | |
918 | int i; | |
919 | ||
920 | /* HFI1_CTRL_CTXT must always use the slow path interrupt handler */ | |
2280740f VN |
921 | for (i = HFI1_CTRL_CTXT + 1; i < dd->num_rcv_contexts; i++) { |
922 | struct hfi1_ctxtdata *rcd = dd->rcd[i]; | |
923 | ||
924 | if ((i < dd->first_dyn_alloc_ctxt) || | |
925 | (rcd && rcd->sc && (rcd->sc->type == SC_KERNEL))) | |
926 | rcd->do_interrupt = &handle_receive_interrupt; | |
927 | } | |
fb9036dd JS |
928 | } |
929 | ||
930 | static inline int set_armed_to_active(struct hfi1_ctxtdata *rcd, | |
c867caaf | 931 | struct hfi1_packet *packet, |
fb9036dd JS |
932 | struct hfi1_devdata *dd) |
933 | { | |
934 | struct work_struct *lsaw = &rcd->ppd->linkstate_active_work; | |
261a4351 MM |
935 | struct ib_header *hdr = hfi1_get_msgheader(packet->rcd->dd, |
936 | packet->rhf_addr); | |
69b9f4a4 | 937 | u8 etype = rhf_rcv_type(packet->rhf); |
fb9036dd | 938 | |
aad559c2 DC |
939 | if (etype == RHF_RCV_TYPE_IB && |
940 | hfi1_9B_get_sc5(hdr, packet->rhf) != 0xf) { | |
fb9036dd JS |
941 | int hwstate = read_logical_state(dd); |
942 | ||
943 | if (hwstate != LSTATE_ACTIVE) { | |
944 | dd_dev_info(dd, "Unexpected link state %d\n", hwstate); | |
945 | return 0; | |
946 | } | |
947 | ||
948 | queue_work(rcd->ppd->hfi1_wq, lsaw); | |
949 | return 1; | |
950 | } | |
951 | return 0; | |
952 | } | |
953 | ||
77241056 MM |
954 | /* |
955 | * handle_receive_interrupt - receive a packet | |
956 | * @rcd: the context | |
957 | * | |
958 | * Called from interrupt handler for errors or receive interrupt. | |
959 | * This is the slow path interrupt handler. | |
960 | */ | |
f4f30031 | 961 | int handle_receive_interrupt(struct hfi1_ctxtdata *rcd, int thread) |
77241056 | 962 | { |
77241056 MM |
963 | struct hfi1_devdata *dd = rcd->dd; |
964 | u32 hdrqtail; | |
82c2611d | 965 | int needset, last = RCV_PKT_OK; |
77241056 | 966 | struct hfi1_packet packet; |
82c2611d NV |
967 | int skip_pkt = 0; |
968 | ||
969 | /* Control context will always use the slow path interrupt handler */ | |
970 | needset = (rcd->ctxt == HFI1_CTRL_CTXT) ? 0 : 1; | |
77241056 MM |
971 | |
972 | init_packet(rcd, &packet); | |
973 | ||
82c2611d | 974 | if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { |
77241056 MM |
975 | u32 seq = rhf_rcv_seq(packet.rhf); |
976 | ||
f4f30031 DL |
977 | if (seq != rcd->seq_cnt) { |
978 | last = RCV_PKT_DONE; | |
77241056 | 979 | goto bail; |
f4f30031 | 980 | } |
77241056 MM |
981 | hdrqtail = 0; |
982 | } else { | |
983 | hdrqtail = get_rcvhdrtail(rcd); | |
f4f30031 DL |
984 | if (packet.rhqoff == hdrqtail) { |
985 | last = RCV_PKT_DONE; | |
77241056 | 986 | goto bail; |
f4f30031 | 987 | } |
77241056 | 988 | smp_rmb(); /* prevent speculative reads of dma'ed hdrq */ |
82c2611d NV |
989 | |
990 | /* | |
991 | * Control context can potentially receive an invalid | |
992 | * rhf. Drop such packets. | |
993 | */ | |
994 | if (rcd->ctxt == HFI1_CTRL_CTXT) { | |
995 | u32 seq = rhf_rcv_seq(packet.rhf); | |
996 | ||
997 | if (seq != rcd->seq_cnt) | |
998 | skip_pkt = 1; | |
999 | } | |
77241056 MM |
1000 | } |
1001 | ||
6c9e50f8 | 1002 | prescan_rxq(rcd, &packet); |
77241056 | 1003 | |
f4f30031 | 1004 | while (last == RCV_PKT_OK) { |
17fb4f29 JJ |
1005 | if (unlikely(dd->do_drop && |
1006 | atomic_xchg(&dd->drop_packet, DROP_PACKET_OFF) == | |
1007 | DROP_PACKET_ON)) { | |
77241056 MM |
1008 | dd->do_drop = 0; |
1009 | ||
1010 | /* On to the next packet */ | |
1011 | packet.rhqoff += packet.rsize; | |
50e5dcbe | 1012 | packet.rhf_addr = (__le32 *)rcd->rcvhdrq + |
77241056 MM |
1013 | packet.rhqoff + |
1014 | dd->rhf_offset; | |
1015 | packet.rhf = rhf_to_cpu(packet.rhf_addr); | |
1016 | ||
82c2611d NV |
1017 | } else if (skip_pkt) { |
1018 | last = skip_rcv_packet(&packet, thread); | |
1019 | skip_pkt = 0; | |
77241056 | 1020 | } else { |
fb9036dd JS |
1021 | /* Auto activate link on non-SC15 packet receive */ |
1022 | if (unlikely(rcd->ppd->host_link_state == | |
1023 | HLS_UP_ARMED) && | |
c867caaf | 1024 | set_armed_to_active(rcd, &packet, dd)) |
fb9036dd | 1025 | goto bail; |
f4f30031 | 1026 | last = process_rcv_packet(&packet, thread); |
77241056 MM |
1027 | } |
1028 | ||
82c2611d | 1029 | if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { |
77241056 MM |
1030 | u32 seq = rhf_rcv_seq(packet.rhf); |
1031 | ||
1032 | if (++rcd->seq_cnt > 13) | |
1033 | rcd->seq_cnt = 1; | |
1034 | if (seq != rcd->seq_cnt) | |
f4f30031 | 1035 | last = RCV_PKT_DONE; |
77241056 | 1036 | if (needset) { |
17fb4f29 | 1037 | dd_dev_info(dd, "Switching to NO_DMA_RTAIL\n"); |
2280740f | 1038 | set_nodma_rtail(dd, rcd->ctxt); |
77241056 MM |
1039 | needset = 0; |
1040 | } | |
1041 | } else { | |
1042 | if (packet.rhqoff == hdrqtail) | |
f4f30031 | 1043 | last = RCV_PKT_DONE; |
82c2611d NV |
1044 | /* |
1045 | * Control context can potentially receive an invalid | |
1046 | * rhf. Drop such packets. | |
1047 | */ | |
1048 | if (rcd->ctxt == HFI1_CTRL_CTXT) { | |
1049 | u32 seq = rhf_rcv_seq(packet.rhf); | |
1050 | ||
1051 | if (++rcd->seq_cnt > 13) | |
1052 | rcd->seq_cnt = 1; | |
1053 | if (!last && (seq != rcd->seq_cnt)) | |
1054 | skip_pkt = 1; | |
1055 | } | |
1056 | ||
77241056 MM |
1057 | if (needset) { |
1058 | dd_dev_info(dd, | |
1059 | "Switching to DMA_RTAIL\n"); | |
2280740f | 1060 | set_dma_rtail(dd, rcd->ctxt); |
77241056 MM |
1061 | needset = 0; |
1062 | } | |
1063 | } | |
1064 | ||
1065 | process_rcv_update(last, &packet); | |
1066 | } | |
1067 | ||
a82a7fcd MM |
1068 | process_rcv_qp_work(rcd); |
1069 | rcd->head = packet.rhqoff; | |
77241056 MM |
1070 | |
1071 | bail: | |
1072 | /* | |
1073 | * Always write head at end, and setup rcv interrupt, even | |
1074 | * if no packets were processed. | |
1075 | */ | |
1076 | finish_packet(&packet); | |
f4f30031 | 1077 | return last; |
77241056 MM |
1078 | } |
1079 | ||
fb9036dd JS |
1080 | /* |
1081 | * We may discover in the interrupt that the hardware link state has | |
1082 | * changed from ARMED to ACTIVE (due to the arrival of a non-SC15 packet), | |
1083 | * and we need to update the driver's notion of the link state. We cannot | |
1084 | * run set_link_state from interrupt context, so we queue this function on | |
1085 | * a workqueue. | |
1086 | * | |
1087 | * We delay the regular interrupt processing until after the state changes | |
1088 | * so that the link will be in the correct state by the time any application | |
1089 | * we wake up attempts to send a reply to any message it received. | |
1090 | * (Subsequent receive interrupts may possibly force the wakeup before we | |
1091 | * update the link state.) | |
1092 | * | |
1093 | * The rcd is freed in hfi1_free_ctxtdata after hfi1_postinit_cleanup invokes | |
1094 | * dd->f_cleanup(dd) to disable the interrupt handler and flush workqueues, | |
1095 | * so we're safe from use-after-free of the rcd. | |
1096 | */ | |
1097 | void receive_interrupt_work(struct work_struct *work) | |
1098 | { | |
1099 | struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata, | |
1100 | linkstate_active_work); | |
1101 | struct hfi1_devdata *dd = ppd->dd; | |
1102 | int i; | |
1103 | ||
1104 | /* Received non-SC15 packet implies neighbor_normal */ | |
1105 | ppd->neighbor_normal = 1; | |
1106 | set_link_state(ppd, HLS_UP_ACTIVE); | |
1107 | ||
1108 | /* | |
2280740f VN |
1109 | * Interrupt all statically allocated kernel contexts that could |
1110 | * have had an interrupt during auto activation. | |
fb9036dd | 1111 | */ |
2280740f | 1112 | for (i = HFI1_CTRL_CTXT; i < dd->first_dyn_alloc_ctxt; i++) |
fb9036dd JS |
1113 | force_recv_intr(dd->rcd[i]); |
1114 | } | |
1115 | ||
77241056 MM |
1116 | /* |
1117 | * Convert a given MTU size to the on-wire MAD packet enumeration. | |
1118 | * Return -1 if the size is invalid. | |
1119 | */ | |
1120 | int mtu_to_enum(u32 mtu, int default_if_bad) | |
1121 | { | |
1122 | switch (mtu) { | |
1123 | case 0: return OPA_MTU_0; | |
1124 | case 256: return OPA_MTU_256; | |
1125 | case 512: return OPA_MTU_512; | |
1126 | case 1024: return OPA_MTU_1024; | |
1127 | case 2048: return OPA_MTU_2048; | |
1128 | case 4096: return OPA_MTU_4096; | |
1129 | case 8192: return OPA_MTU_8192; | |
1130 | case 10240: return OPA_MTU_10240; | |
1131 | } | |
1132 | return default_if_bad; | |
1133 | } | |
1134 | ||
1135 | u16 enum_to_mtu(int mtu) | |
1136 | { | |
1137 | switch (mtu) { | |
1138 | case OPA_MTU_0: return 0; | |
1139 | case OPA_MTU_256: return 256; | |
1140 | case OPA_MTU_512: return 512; | |
1141 | case OPA_MTU_1024: return 1024; | |
1142 | case OPA_MTU_2048: return 2048; | |
1143 | case OPA_MTU_4096: return 4096; | |
1144 | case OPA_MTU_8192: return 8192; | |
1145 | case OPA_MTU_10240: return 10240; | |
1146 | default: return 0xffff; | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * set_mtu - set the MTU | |
1152 | * @ppd: the per port data | |
1153 | * | |
1154 | * We can handle "any" incoming size, the issue here is whether we | |
1155 | * need to restrict our outgoing size. We do not deal with what happens | |
1156 | * to programs that are already running when the size changes. | |
1157 | */ | |
1158 | int set_mtu(struct hfi1_pportdata *ppd) | |
1159 | { | |
1160 | struct hfi1_devdata *dd = ppd->dd; | |
1161 | int i, drain, ret = 0, is_up = 0; | |
1162 | ||
1163 | ppd->ibmtu = 0; | |
1164 | for (i = 0; i < ppd->vls_supported; i++) | |
1165 | if (ppd->ibmtu < dd->vld[i].mtu) | |
1166 | ppd->ibmtu = dd->vld[i].mtu; | |
1167 | ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd); | |
1168 | ||
1169 | mutex_lock(&ppd->hls_lock); | |
d0d236ea JJ |
1170 | if (ppd->host_link_state == HLS_UP_INIT || |
1171 | ppd->host_link_state == HLS_UP_ARMED || | |
1172 | ppd->host_link_state == HLS_UP_ACTIVE) | |
77241056 MM |
1173 | is_up = 1; |
1174 | ||
1175 | drain = !is_ax(dd) && is_up; | |
1176 | ||
1177 | if (drain) | |
1178 | /* | |
1179 | * MTU is specified per-VL. To ensure that no packet gets | |
1180 | * stuck (due, e.g., to the MTU for the packet's VL being | |
1181 | * reduced), empty the per-VL FIFOs before adjusting MTU. | |
1182 | */ | |
1183 | ret = stop_drain_data_vls(dd); | |
1184 | ||
1185 | if (ret) { | |
1186 | dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n", | |
1187 | __func__); | |
1188 | goto err; | |
1189 | } | |
1190 | ||
1191 | hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0); | |
1192 | ||
1193 | if (drain) | |
1194 | open_fill_data_vls(dd); /* reopen all VLs */ | |
1195 | ||
1196 | err: | |
1197 | mutex_unlock(&ppd->hls_lock); | |
1198 | ||
1199 | return ret; | |
1200 | } | |
1201 | ||
1202 | int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc) | |
1203 | { | |
1204 | struct hfi1_devdata *dd = ppd->dd; | |
1205 | ||
1206 | ppd->lid = lid; | |
1207 | ppd->lmc = lmc; | |
1208 | hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0); | |
1209 | ||
cde10afa | 1210 | dd_dev_info(dd, "port %u: got a lid: 0x%x\n", ppd->port, lid); |
77241056 MM |
1211 | |
1212 | return 0; | |
1213 | } | |
1214 | ||
91ab4ed3 EH |
1215 | void shutdown_led_override(struct hfi1_pportdata *ppd) |
1216 | { | |
1217 | struct hfi1_devdata *dd = ppd->dd; | |
1218 | ||
409b1462 | 1219 | /* |
2243472e EH |
1220 | * This pairs with the memory barrier in hfi1_start_led_override to |
1221 | * ensure that we read the correct state of LED beaconing represented | |
1222 | * by led_override_timer_active | |
409b1462 | 1223 | */ |
2243472e | 1224 | smp_rmb(); |
91ab4ed3 EH |
1225 | if (atomic_read(&ppd->led_override_timer_active)) { |
1226 | del_timer_sync(&ppd->led_override_timer); | |
1227 | atomic_set(&ppd->led_override_timer_active, 0); | |
2243472e EH |
1228 | /* Ensure the atomic_set is visible to all CPUs */ |
1229 | smp_wmb(); | |
91ab4ed3 EH |
1230 | } |
1231 | ||
2243472e EH |
1232 | /* Hand control of the LED to the DC for normal operation */ |
1233 | write_csr(dd, DCC_CFG_LED_CNTRL, 0); | |
91ab4ed3 | 1234 | } |
77241056 MM |
1235 | |
1236 | static void run_led_override(unsigned long opaque) | |
1237 | { | |
1238 | struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)opaque; | |
1239 | struct hfi1_devdata *dd = ppd->dd; | |
91ab4ed3 EH |
1240 | unsigned long timeout; |
1241 | int phase_idx; | |
77241056 MM |
1242 | |
1243 | if (!(dd->flags & HFI1_INITTED)) | |
1244 | return; | |
1245 | ||
91ab4ed3 | 1246 | phase_idx = ppd->led_override_phase & 1; |
77241056 | 1247 | |
91ab4ed3 EH |
1248 | setextled(dd, phase_idx); |
1249 | ||
1250 | timeout = ppd->led_override_vals[phase_idx]; | |
2243472e | 1251 | |
91ab4ed3 EH |
1252 | /* Set up for next phase */ |
1253 | ppd->led_override_phase = !ppd->led_override_phase; | |
77241056 | 1254 | |
2243472e | 1255 | mod_timer(&ppd->led_override_timer, jiffies + timeout); |
77241056 MM |
1256 | } |
1257 | ||
91ab4ed3 EH |
1258 | /* |
1259 | * To have the LED blink in a particular pattern, provide timeon and timeoff | |
2243472e EH |
1260 | * in milliseconds. |
1261 | * To turn off custom blinking and return to normal operation, use | |
1262 | * shutdown_led_override() | |
91ab4ed3 | 1263 | */ |
2243472e EH |
1264 | void hfi1_start_led_override(struct hfi1_pportdata *ppd, unsigned int timeon, |
1265 | unsigned int timeoff) | |
77241056 | 1266 | { |
2243472e | 1267 | if (!(ppd->dd->flags & HFI1_INITTED)) |
77241056 MM |
1268 | return; |
1269 | ||
91ab4ed3 EH |
1270 | /* Convert to jiffies for direct use in timer */ |
1271 | ppd->led_override_vals[0] = msecs_to_jiffies(timeoff); | |
1272 | ppd->led_override_vals[1] = msecs_to_jiffies(timeon); | |
77241056 | 1273 | |
2243472e EH |
1274 | /* Arbitrarily start from LED on phase */ |
1275 | ppd->led_override_phase = 1; | |
77241056 MM |
1276 | |
1277 | /* | |
1278 | * If the timer has not already been started, do so. Use a "quick" | |
2243472e | 1279 | * timeout so the handler will be called soon to look at our request. |
77241056 | 1280 | */ |
2243472e | 1281 | if (!timer_pending(&ppd->led_override_timer)) { |
a3faf606 | 1282 | setup_timer(&ppd->led_override_timer, run_led_override, |
17fb4f29 | 1283 | (unsigned long)ppd); |
77241056 MM |
1284 | ppd->led_override_timer.expires = jiffies + 1; |
1285 | add_timer(&ppd->led_override_timer); | |
2243472e EH |
1286 | atomic_set(&ppd->led_override_timer_active, 1); |
1287 | /* Ensure the atomic_set is visible to all CPUs */ | |
1288 | smp_wmb(); | |
77241056 MM |
1289 | } |
1290 | } | |
1291 | ||
1292 | /** | |
1293 | * hfi1_reset_device - reset the chip if possible | |
1294 | * @unit: the device to reset | |
1295 | * | |
1296 | * Whether or not reset is successful, we attempt to re-initialize the chip | |
1297 | * (that is, much like a driver unload/reload). We clear the INITTED flag | |
1298 | * so that the various entry points will fail until we reinitialize. For | |
1299 | * now, we only allow this if no user contexts are open that use chip resources | |
1300 | */ | |
1301 | int hfi1_reset_device(int unit) | |
1302 | { | |
1303 | int ret, i; | |
1304 | struct hfi1_devdata *dd = hfi1_lookup(unit); | |
1305 | struct hfi1_pportdata *ppd; | |
1306 | unsigned long flags; | |
1307 | int pidx; | |
1308 | ||
1309 | if (!dd) { | |
1310 | ret = -ENODEV; | |
1311 | goto bail; | |
1312 | } | |
1313 | ||
1314 | dd_dev_info(dd, "Reset on unit %u requested\n", unit); | |
1315 | ||
1316 | if (!dd->kregbase || !(dd->flags & HFI1_PRESENT)) { | |
1317 | dd_dev_info(dd, | |
17fb4f29 JJ |
1318 | "Invalid unit number %u or not initialized or not present\n", |
1319 | unit); | |
77241056 MM |
1320 | ret = -ENXIO; |
1321 | goto bail; | |
1322 | } | |
1323 | ||
1324 | spin_lock_irqsave(&dd->uctxt_lock, flags); | |
1325 | if (dd->rcd) | |
2280740f VN |
1326 | for (i = dd->first_dyn_alloc_ctxt; |
1327 | i < dd->num_rcv_contexts; i++) { | |
77241056 MM |
1328 | if (!dd->rcd[i] || !dd->rcd[i]->cnt) |
1329 | continue; | |
1330 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
1331 | ret = -EBUSY; | |
1332 | goto bail; | |
1333 | } | |
1334 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
1335 | ||
1336 | for (pidx = 0; pidx < dd->num_pports; ++pidx) { | |
1337 | ppd = dd->pport + pidx; | |
77241056 | 1338 | |
91ab4ed3 | 1339 | shutdown_led_override(ppd); |
77241056 MM |
1340 | } |
1341 | if (dd->flags & HFI1_HAS_SEND_DMA) | |
1342 | sdma_exit(dd); | |
1343 | ||
1344 | hfi1_reset_cpu_counters(dd); | |
1345 | ||
1346 | ret = hfi1_init(dd, 1); | |
1347 | ||
1348 | if (ret) | |
1349 | dd_dev_err(dd, | |
17fb4f29 JJ |
1350 | "Reinitialize unit %u after reset failed with %d\n", |
1351 | unit, ret); | |
77241056 MM |
1352 | else |
1353 | dd_dev_info(dd, "Reinitialized unit %u after resetting\n", | |
17fb4f29 | 1354 | unit); |
77241056 MM |
1355 | |
1356 | bail: | |
1357 | return ret; | |
1358 | } | |
1359 | ||
1360 | void handle_eflags(struct hfi1_packet *packet) | |
1361 | { | |
1362 | struct hfi1_ctxtdata *rcd = packet->rcd; | |
1363 | u32 rte = rhf_rcv_type_err(packet->rhf); | |
1364 | ||
77241056 | 1365 | rcv_hdrerr(rcd, rcd->ppd, packet); |
a03a03e9 IH |
1366 | if (rhf_err_flags(packet->rhf)) |
1367 | dd_dev_err(rcd->dd, | |
1368 | "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n", | |
1369 | rcd->ctxt, packet->rhf, | |
1370 | packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "", | |
1371 | packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "", | |
1372 | packet->rhf & RHF_DC_ERR ? "dc " : "", | |
1373 | packet->rhf & RHF_TID_ERR ? "tid " : "", | |
1374 | packet->rhf & RHF_LEN_ERR ? "len " : "", | |
1375 | packet->rhf & RHF_ECC_ERR ? "ecc " : "", | |
1376 | packet->rhf & RHF_VCRC_ERR ? "vcrc " : "", | |
1377 | packet->rhf & RHF_ICRC_ERR ? "icrc " : "", | |
1378 | rte); | |
77241056 MM |
1379 | } |
1380 | ||
1381 | /* | |
1382 | * The following functions are called by the interrupt handler. They are type | |
1383 | * specific handlers for each packet type. | |
1384 | */ | |
1385 | int process_receive_ib(struct hfi1_packet *packet) | |
1386 | { | |
0181ce31 DH |
1387 | if (unlikely(hfi1_dbg_fault_packet(packet))) |
1388 | return RHF_RCV_CONTINUE; | |
1389 | ||
77241056 MM |
1390 | trace_hfi1_rcvhdr(packet->rcd->ppd->dd, |
1391 | packet->rcd->ctxt, | |
1392 | rhf_err_flags(packet->rhf), | |
1393 | RHF_RCV_TYPE_IB, | |
1394 | packet->hlen, | |
1395 | packet->tlen, | |
1396 | packet->updegr, | |
1397 | rhf_egr_index(packet->rhf)); | |
1398 | ||
243d9f43 DH |
1399 | if (unlikely( |
1400 | (hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) && | |
1401 | (packet->rhf & RHF_DC_ERR)))) | |
1402 | return RHF_RCV_CONTINUE; | |
1403 | ||
77241056 MM |
1404 | if (unlikely(rhf_err_flags(packet->rhf))) { |
1405 | handle_eflags(packet); | |
1406 | return RHF_RCV_CONTINUE; | |
1407 | } | |
1408 | ||
1409 | hfi1_ib_rcv(packet); | |
1410 | return RHF_RCV_CONTINUE; | |
1411 | } | |
1412 | ||
d4829ea6 VN |
1413 | static inline bool hfi1_is_vnic_packet(struct hfi1_packet *packet) |
1414 | { | |
1415 | /* Packet received in VNIC context via RSM */ | |
1416 | if (packet->rcd->is_vnic) | |
1417 | return true; | |
1418 | ||
1419 | if ((HFI1_GET_L2_TYPE(packet->ebuf) == OPA_VNIC_L2_TYPE) && | |
1420 | (HFI1_GET_L4_TYPE(packet->ebuf) == OPA_VNIC_L4_ETHR)) | |
1421 | return true; | |
1422 | ||
1423 | return false; | |
1424 | } | |
1425 | ||
77241056 MM |
1426 | int process_receive_bypass(struct hfi1_packet *packet) |
1427 | { | |
505efe3e JP |
1428 | struct hfi1_devdata *dd = packet->rcd->dd; |
1429 | ||
d4829ea6 | 1430 | if (unlikely(rhf_err_flags(packet->rhf))) { |
77241056 | 1431 | handle_eflags(packet); |
d4829ea6 VN |
1432 | } else if (hfi1_is_vnic_packet(packet)) { |
1433 | hfi1_vnic_bypass_rcv(packet); | |
1434 | return RHF_RCV_CONTINUE; | |
1435 | } | |
77241056 | 1436 | |
d4829ea6 | 1437 | dd_dev_err(dd, "Unsupported bypass packet. Dropping\n"); |
505efe3e JP |
1438 | incr_cntr64(&dd->sw_rcv_bypass_packet_errors); |
1439 | if (!(dd->err_info_rcvport.status_and_code & OPA_EI_STATUS_SMASK)) { | |
1440 | u64 *flits = packet->ebuf; | |
1441 | ||
1442 | if (flits && !(packet->rhf & RHF_LEN_ERR)) { | |
1443 | dd->err_info_rcvport.packet_flit1 = flits[0]; | |
1444 | dd->err_info_rcvport.packet_flit2 = | |
1445 | packet->tlen > sizeof(flits[0]) ? flits[1] : 0; | |
1446 | } | |
1447 | dd->err_info_rcvport.status_and_code |= | |
1448 | (OPA_EI_STATUS_SMASK | BAD_L2_ERR); | |
1449 | } | |
77241056 MM |
1450 | return RHF_RCV_CONTINUE; |
1451 | } | |
1452 | ||
1453 | int process_receive_error(struct hfi1_packet *packet) | |
1454 | { | |
243d9f43 DH |
1455 | /* KHdrHCRCErr -- KDETH packet with a bad HCRC */ |
1456 | if (unlikely( | |
1457 | hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) && | |
1458 | rhf_rcv_type_err(packet->rhf) == 3)) | |
1459 | return RHF_RCV_CONTINUE; | |
1460 | ||
77241056 MM |
1461 | handle_eflags(packet); |
1462 | ||
1463 | if (unlikely(rhf_err_flags(packet->rhf))) | |
1464 | dd_dev_err(packet->rcd->dd, | |
1465 | "Unhandled error packet received. Dropping.\n"); | |
1466 | ||
1467 | return RHF_RCV_CONTINUE; | |
1468 | } | |
1469 | ||
1470 | int kdeth_process_expected(struct hfi1_packet *packet) | |
1471 | { | |
0181ce31 DH |
1472 | if (unlikely(hfi1_dbg_fault_packet(packet))) |
1473 | return RHF_RCV_CONTINUE; | |
77241056 MM |
1474 | if (unlikely(rhf_err_flags(packet->rhf))) |
1475 | handle_eflags(packet); | |
1476 | ||
1477 | dd_dev_err(packet->rcd->dd, | |
1478 | "Unhandled expected packet received. Dropping.\n"); | |
1479 | return RHF_RCV_CONTINUE; | |
1480 | } | |
1481 | ||
1482 | int kdeth_process_eager(struct hfi1_packet *packet) | |
1483 | { | |
1484 | if (unlikely(rhf_err_flags(packet->rhf))) | |
1485 | handle_eflags(packet); | |
0181ce31 DH |
1486 | if (unlikely(hfi1_dbg_fault_packet(packet))) |
1487 | return RHF_RCV_CONTINUE; | |
77241056 MM |
1488 | |
1489 | dd_dev_err(packet->rcd->dd, | |
1490 | "Unhandled eager packet received. Dropping.\n"); | |
1491 | return RHF_RCV_CONTINUE; | |
1492 | } | |
1493 | ||
1494 | int process_receive_invalid(struct hfi1_packet *packet) | |
1495 | { | |
1496 | dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n", | |
17fb4f29 | 1497 | rhf_rcv_type(packet->rhf)); |
77241056 MM |
1498 | return RHF_RCV_CONTINUE; |
1499 | } |