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Merge branches 'cma', 'ehca', 'ipath', 'iser', 'mlx4' and 'nes' into for-next
[linux-2.6-block.git] / drivers / infiniband / hw / ipath / ipath_mad.c
CommitLineData
e28c00ad 1/*
e7eacd36 2 * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved.
e28c00ad
BS		 3 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34#include <rdma/ib_smi.h>
35
36#include "ipath_kernel.h"
37#include "ipath_verbs.h"
27b678dd 38#include "ipath_common.h"
e28c00ad
BS		 39
40#define IB_SMP_UNSUP_VERSION __constant_htons(0x0004)
41#define IB_SMP_UNSUP_METHOD __constant_htons(0x0008)
42#define IB_SMP_UNSUP_METH_ATTR __constant_htons(0x000C)
43#define IB_SMP_INVALID_FIELD __constant_htons(0x001C)
44
45static int reply(struct ib_smp *smp)
46{
47 /*
48 * The verbs framework will handle the directed/LID route
49 * packet changes.
50 */
51 smp->method = IB_MGMT_METHOD_GET_RESP;
52 if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
53 smp->status |= IB_SMP_DIRECTION;
54 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
55}
56
57static int recv_subn_get_nodedescription(struct ib_smp *smp,
58 struct ib_device *ibdev)
59{
60 if (smp->attr_mod)
61 smp->status |= IB_SMP_INVALID_FIELD;
62
63 strncpy(smp->data, ibdev->node_desc, sizeof(smp->data));
64
65 return reply(smp);
66}
67
68struct nodeinfo {
69 u8 base_version;
70 u8 class_version;
71 u8 node_type;
72 u8 num_ports;
73 __be64 sys_guid;
74 __be64 node_guid;
75 __be64 port_guid;
76 __be16 partition_cap;
77 __be16 device_id;
78 __be32 revision;
79 u8 local_port_num;
80 u8 vendor_id[3];
81} __attribute__ ((packed));
82
83static int recv_subn_get_nodeinfo(struct ib_smp *smp,
84 struct ib_device *ibdev, u8 port)
85{
86 struct nodeinfo *nip = (struct nodeinfo *)&smp->data;
87 struct ipath_devdata *dd = to_idev(ibdev)->dd;
e8a88f09 88 u32 vendor, majrev, minrev;
e28c00ad 89
11b054fe
BS		 90 /* GUID 0 is illegal */
91 if (smp->attr_mod || (dd->ipath_guid == 0))
e28c00ad
BS		 92 smp->status |= IB_SMP_INVALID_FIELD;
93
94 nip->base_version = 1;
95 nip->class_version = 1;
96 nip->node_type = 1; /* channel adapter */
97 /*
98 * XXX The num_ports value will need a layer function to get
99 * the value if we ever have more than one IB port on a chip.
100 * We will also need to get the GUID for the port.
101 */
102 nip->num_ports = ibdev->phys_port_cnt;
103 /* This is already in network order */
104 nip->sys_guid = to_idev(ibdev)->sys_image_guid;
34b2aafe 105 nip->node_guid = dd->ipath_guid;
f41d2298 106 nip->port_guid = dd->ipath_guid;
34b2aafe
BS		 107 nip->partition_cap = cpu_to_be16(ipath_get_npkeys(dd));
108 nip->device_id = cpu_to_be16(dd->ipath_deviceid);
109 majrev = dd->ipath_majrev;
110 minrev = dd->ipath_minrev;
e28c00ad
BS		 111 nip->revision = cpu_to_be32((majrev << 16) | minrev);
112 nip->local_port_num = port;
34b2aafe 113 vendor = dd->ipath_vendorid;
df866619
RC		 114 nip->vendor_id[0] = IPATH_SRC_OUI_1;
115 nip->vendor_id[1] = IPATH_SRC_OUI_2;
116 nip->vendor_id[2] = IPATH_SRC_OUI_3;
e28c00ad
BS		 117
118 return reply(smp);
119}
120
121static int recv_subn_get_guidinfo(struct ib_smp *smp,
122 struct ib_device *ibdev)
123{
124 u32 startgx = 8 * be32_to_cpu(smp->attr_mod);
125 __be64 *p = (__be64 *) smp->data;
126
127 /* 32 blocks of 8 64-bit GUIDs per block */
128
129 memset(smp->data, 0, sizeof(smp->data));
130
131 /*
132 * We only support one GUID for now. If this changes, the
133 * portinfo.guid_cap field needs to be updated too.
134 */
11b054fe
BS		 135 if (startgx == 0) {
136 __be64 g = to_idev(ibdev)->dd->ipath_guid;
137 if (g == 0)
138 /* GUID 0 is illegal */
139 smp->status |= IB_SMP_INVALID_FIELD;
140 else
141 /* The first is a copy of the read-only HW GUID. */
142 *p = g;
143 } else
e28c00ad
BS		 144 smp->status |= IB_SMP_INVALID_FIELD;
145
146 return reply(smp);
147}
148
a51a2513
RC		 149static void set_link_width_enabled(struct ipath_devdata *dd, u32 w)
150{
151 (void) dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_LWID_ENB, w);
152}
153
154static void set_link_speed_enabled(struct ipath_devdata *dd, u32 s)
155{
156 (void) dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_SPD_ENB, s);
157}
34b2aafe
BS		 158
159static int get_overrunthreshold(struct ipath_devdata *dd)
160{
161 return (dd->ipath_ibcctrl >>
162 INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT) &
163 INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK;
164}
165
166/**
167 * set_overrunthreshold - set the overrun threshold
168 * @dd: the infinipath device
169 * @n: the new threshold
170 *
171 * Note that this will only take effect when the link state changes.
172 */
173static int set_overrunthreshold(struct ipath_devdata *dd, unsigned n)
174{
175 unsigned v;
176
177 v = (dd->ipath_ibcctrl >> INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT) &
178 INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK;
179 if (v != n) {
180 dd->ipath_ibcctrl &=
181 ~(INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK <<
182 INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT);
183 dd->ipath_ibcctrl |=
184 (u64) n << INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT;
185 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
186 dd->ipath_ibcctrl);
187 }
188 return 0;
189}
190
191static int get_phyerrthreshold(struct ipath_devdata *dd)
192{
193 return (dd->ipath_ibcctrl >>
194 INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
195 INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
196}
197
198/**
199 * set_phyerrthreshold - set the physical error threshold
200 * @dd: the infinipath device
201 * @n: the new threshold
202 *
203 * Note that this will only take effect when the link state changes.
204 */
205static int set_phyerrthreshold(struct ipath_devdata *dd, unsigned n)
206{
207 unsigned v;
208
209 v = (dd->ipath_ibcctrl >> INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
210 INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
211 if (v != n) {
212 dd->ipath_ibcctrl &=
213 ~(INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK <<
214 INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT);
215 dd->ipath_ibcctrl |=
216 (u64) n << INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT;
217 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
218 dd->ipath_ibcctrl);
219 }
220 return 0;
221}
222
223/**
224 * get_linkdowndefaultstate - get the default linkdown state
225 * @dd: the infinipath device
226 *
227 * Returns zero if the default is POLL, 1 if the default is SLEEP.
228 */
229static int get_linkdowndefaultstate(struct ipath_devdata *dd)
230{
231 return !!(dd->ipath_ibcctrl & INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE);
232}
233
e28c00ad
BS		 234static int recv_subn_get_portinfo(struct ib_smp *smp,
235 struct ib_device *ibdev, u8 port)
236{
237 struct ipath_ibdev *dev;
a51a2513 238 struct ipath_devdata *dd;
da2ab62a 239 struct ib_port_info *pip = (struct ib_port_info *)smp->data;
e28c00ad
BS		 240 u16 lid;
241 u8 ibcstat;
242 u8 mtu;
243 int ret;
244
245 if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt) {
246 smp->status |= IB_SMP_INVALID_FIELD;
247 ret = reply(smp);
248 goto bail;
249 }
250
251 dev = to_idev(ibdev);
a51a2513 252 dd = dev->dd;
e28c00ad
BS		 253
254 /* Clear all fields. Only set the non-zero fields. */
255 memset(smp->data, 0, sizeof(smp->data));
256
257 /* Only return the mkey if the protection field allows it. */
258 if (smp->method == IB_MGMT_METHOD_SET || dev->mkey == smp->mkey ||
542869a1 259 dev->mkeyprot == 0)
e28c00ad
BS		 260 pip->mkey = dev->mkey;
261 pip->gid_prefix = dev->gid_prefix;
a51a2513 262 lid = dd->ipath_lid;
e28c00ad
BS		 263 pip->lid = lid ? cpu_to_be16(lid) : IB_LID_PERMISSIVE;
264 pip->sm_lid = cpu_to_be16(dev->sm_lid);
265 pip->cap_mask = cpu_to_be32(dev->port_cap_flags);
266 /* pip->diag_code; */
267 pip->mkey_lease_period = cpu_to_be16(dev->mkey_lease_period);
268 pip->local_port_num = port;
a51a2513
RC		 269 pip->link_width_enabled = dd->ipath_link_width_enabled;
270 pip->link_width_supported = dd->ipath_link_width_supported;
271 pip->link_width_active = dd->ipath_link_width_active;
272 pip->linkspeed_portstate = dd->ipath_link_speed_supported << 4;
273 ibcstat = dd->ipath_lastibcstat;
274 /* map LinkState to IB portinfo values. */
275 pip->linkspeed_portstate |= ipath_ib_linkstate(dd, ibcstat) + 1;
276
e28c00ad 277 pip->portphysstate_linkdown =
a51a2513
RC		 278 (ipath_cvt_physportstate[ibcstat & dd->ibcs_lts_mask] << 4) |
279 (get_linkdowndefaultstate(dd) ? 1 : 2);
280 pip->mkeyprot_resv_lmc = (dev->mkeyprot << 6) | dd->ipath_lmc;
281 pip->linkspeedactive_enabled = (dd->ipath_link_speed_active << 4) |
282 dd->ipath_link_speed_enabled;
283 switch (dd->ipath_ibmtu) {
e28c00ad
BS		 284 case 4096:
285 mtu = IB_MTU_4096;
286 break;
287 case 2048:
288 mtu = IB_MTU_2048;
289 break;
290 case 1024:
291 mtu = IB_MTU_1024;
292 break;
293 case 512:
294 mtu = IB_MTU_512;
295 break;
296 case 256:
297 mtu = IB_MTU_256;
298 break;
299 default: /* oops, something is wrong */
300 mtu = IB_MTU_2048;
301 break;
302 }
303 pip->neighbormtu_mastersmsl = (mtu << 4) | dev->sm_sl;
304 pip->vlcap_inittype = 0x10; /* VLCap = VL0, InitType = 0 */
305 pip->vl_high_limit = dev->vl_high_limit;
306 /* pip->vl_arb_high_cap; // only one VL */
307 /* pip->vl_arb_low_cap; // only one VL */
308 /* InitTypeReply = 0 */
826d8010
DO		 309 /* our mtu cap depends on whether 4K MTU enabled or not */
310 pip->inittypereply_mtucap = ipath_mtu4096 ? IB_MTU_4096 : IB_MTU_2048;
311 /* HCAs ignore VLStallCount and HOQLife */
e28c00ad
BS		 312 /* pip->vlstallcnt_hoqlife; */
313 pip->operationalvl_pei_peo_fpi_fpo = 0x10; /* OVLs = 1 */
314 pip->mkey_violations = cpu_to_be16(dev->mkey_violations);
315 /* P_KeyViolations are counted by hardware. */
316 pip->pkey_violations =
a51a2513 317 cpu_to_be16((ipath_get_cr_errpkey(dd) -
443a64ab 318 dev->z_pkey_violations) & 0xFFFF);
e28c00ad
BS		 319 pip->qkey_violations = cpu_to_be16(dev->qkey_violations);
320 /* Only the hardware GUID is supported for now */
321 pip->guid_cap = 1;
322 pip->clientrereg_resv_subnetto = dev->subnet_timeout;
323 /* 32.768 usec. response time (guessing) */
324 pip->resv_resptimevalue = 3;
325 pip->localphyerrors_overrunerrors =
a51a2513
RC		 326 (get_phyerrthreshold(dd) << 4) |
327 get_overrunthreshold(dd);
e28c00ad 328 /* pip->max_credit_hint; */
a51a2513
RC		 329 if (dev->port_cap_flags & IB_PORT_LINK_LATENCY_SUP) {
330 u32 v;
331
332 v = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_LINKLATENCY);
333 pip->link_roundtrip_latency[0] = v >> 16;
334 pip->link_roundtrip_latency[1] = v >> 8;
335 pip->link_roundtrip_latency[2] = v;
336 }
e28c00ad
BS		 337
338 ret = reply(smp);
339
340bail:
341 return ret;
342}
343
34b2aafe
BS		 344/**
345 * get_pkeys - return the PKEY table for port 0
346 * @dd: the infinipath device
347 * @pkeys: the pkey table is placed here
348 */
349static int get_pkeys(struct ipath_devdata *dd, u16 * pkeys)
350{
3d089098 351 /* always a kernel port, no locking needed */
34b2aafe
BS		 352 struct ipath_portdata *pd = dd->ipath_pd[0];
353
354 memcpy(pkeys, pd->port_pkeys, sizeof(pd->port_pkeys));
355
356 return 0;
357}
358
e28c00ad
BS		 359static int recv_subn_get_pkeytable(struct ib_smp *smp,
360 struct ib_device *ibdev)
361{
362 u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
363 u16 *p = (u16 *) smp->data;
364 __be16 *q = (__be16 *) smp->data;
365
366 /* 64 blocks of 32 16-bit P_Key entries */
367
368 memset(smp->data, 0, sizeof(smp->data));
369 if (startpx == 0) {
370 struct ipath_ibdev *dev = to_idev(ibdev);
34b2aafe 371 unsigned i, n = ipath_get_npkeys(dev->dd);
e28c00ad 372
34b2aafe 373 get_pkeys(dev->dd, p);
e28c00ad
BS		 374
375 for (i = 0; i < n; i++)
376 q[i] = cpu_to_be16(p[i]);
377 } else
378 smp->status |= IB_SMP_INVALID_FIELD;
379
380 return reply(smp);
381}
382
383static int recv_subn_set_guidinfo(struct ib_smp *smp,
384 struct ib_device *ibdev)
385{
386 /* The only GUID we support is the first read-only entry. */
387 return recv_subn_get_guidinfo(smp, ibdev);
388}
389
34b2aafe
BS		 390/**
391 * set_linkdowndefaultstate - set the default linkdown state
392 * @dd: the infinipath device
393 * @sleep: the new state
394 *
395 * Note that this will only take effect when the link state changes.
396 */
397static int set_linkdowndefaultstate(struct ipath_devdata *dd, int sleep)
398{
399 if (sleep)
400 dd->ipath_ibcctrl |= INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
401 else
402 dd->ipath_ibcctrl &= ~INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
403 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
404 dd->ipath_ibcctrl);
405 return 0;
406}
407
e28c00ad
BS		 408/**
409 * recv_subn_set_portinfo - set port information
410 * @smp: the incoming SM packet
411 * @ibdev: the infiniband device
412 * @port: the port on the device
413 *
414 * Set Portinfo (see ch. 14.2.5.6).
415 */
416static int recv_subn_set_portinfo(struct ib_smp *smp,
417 struct ib_device *ibdev, u8 port)
418{
da2ab62a 419 struct ib_port_info *pip = (struct ib_port_info *)smp->data;
e28c00ad
BS		 420 struct ib_event event;
421 struct ipath_ibdev *dev;
542869a1 422 struct ipath_devdata *dd;
e28c00ad
BS		 423 char clientrereg = 0;
424 u16 lid, smlid;
425 u8 lwe;
426 u8 lse;
427 u8 state;
428 u16 lstate;
429 u32 mtu;
34b2aafe 430 int ret, ore;
e28c00ad
BS		 431
432 if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt)
433 goto err;
434
435 dev = to_idev(ibdev);
542869a1 436 dd = dev->dd;
e28c00ad
BS		 437 event.device = ibdev;
438 event.element.port_num = port;
439
440 dev->mkey = pip->mkey;
441 dev->gid_prefix = pip->gid_prefix;
442 dev->mkey_lease_period = be16_to_cpu(pip->mkey_lease_period);
443
444 lid = be16_to_cpu(pip->lid);
542869a1
RC		 445 if (dd->ipath_lid != lid ||
446 dd->ipath_lmc != (pip->mkeyprot_resv_lmc & 7)) {
e28c00ad 447 /* Must be a valid unicast LID address. */
27b678dd 448 if (lid == 0 || lid >= IPATH_MULTICAST_LID_BASE)
e28c00ad 449 goto err;
542869a1 450 ipath_set_lid(dd, lid, pip->mkeyprot_resv_lmc & 7);
e28c00ad
BS		 451 event.event = IB_EVENT_LID_CHANGE;
452 ib_dispatch_event(&event);
453 }
454
455 smlid = be16_to_cpu(pip->sm_lid);
456 if (smlid != dev->sm_lid) {
457 /* Must be a valid unicast LID address. */
27b678dd 458 if (smlid == 0 || smlid >= IPATH_MULTICAST_LID_BASE)
e28c00ad
BS		 459 goto err;
460 dev->sm_lid = smlid;
461 event.event = IB_EVENT_SM_CHANGE;
462 ib_dispatch_event(&event);
463 }
464
a51a2513 465 /* Allow 1x or 4x to be set (see 14.2.6.6). */
e28c00ad 466 lwe = pip->link_width_enabled;
a51a2513
RC		 467 if (lwe) {
468 if (lwe == 0xFF)
469 lwe = dd->ipath_link_width_supported;
470 else if (lwe >= 16 || (lwe & ~dd->ipath_link_width_supported))
471 goto err;
472 set_link_width_enabled(dd, lwe);
473 }
e28c00ad 474
a51a2513 475 /* Allow 2.5 or 5.0 Gbs. */
e28c00ad 476 lse = pip->linkspeedactive_enabled & 0xF;
a51a2513
RC		 477 if (lse) {
478 if (lse == 15)
479 lse = dd->ipath_link_speed_supported;
480 else if (lse >= 8 || (lse & ~dd->ipath_link_speed_supported))
481 goto err;
482 set_link_speed_enabled(dd, lse);
483 }
e28c00ad
BS		 484
485 /* Set link down default state. */
486 switch (pip->portphysstate_linkdown & 0xF) {
487 case 0: /* NOP */
488 break;
489 case 1: /* SLEEP */
542869a1 490 if (set_linkdowndefaultstate(dd, 1))
e28c00ad
BS		 491 goto err;
492 break;
493 case 2: /* POLL */
542869a1 494 if (set_linkdowndefaultstate(dd, 0))
e28c00ad
BS		 495 goto err;
496 break;
497 default:
498 goto err;
499 }
500
542869a1 501 dev->mkeyprot = pip->mkeyprot_resv_lmc >> 6;
e28c00ad
BS		 502 dev->vl_high_limit = pip->vl_high_limit;
503
504 switch ((pip->neighbormtu_mastersmsl >> 4) & 0xF) {
505 case IB_MTU_256:
506 mtu = 256;
507 break;
508 case IB_MTU_512:
509 mtu = 512;
510 break;
511 case IB_MTU_1024:
512 mtu = 1024;
513 break;
514 case IB_MTU_2048:
515 mtu = 2048;
516 break;
517 case IB_MTU_4096:
826d8010
DO		 518 if (!ipath_mtu4096)
519 goto err;
e28c00ad
BS		 520 mtu = 4096;
521 break;
522 default:
523 /* XXX We have already partially updated our state! */
524 goto err;
525 }
542869a1 526 ipath_set_mtu(dd, mtu);
e28c00ad
BS		 527
528 dev->sm_sl = pip->neighbormtu_mastersmsl & 0xF;
529
530 /* We only support VL0 */
531 if (((pip->operationalvl_pei_peo_fpi_fpo >> 4) & 0xF) > 1)
532 goto err;
533
534 if (pip->mkey_violations == 0)
535 dev->mkey_violations = 0;
536
537 /*
538 * Hardware counter can't be reset so snapshot and subtract
539 * later.
540 */
541 if (pip->pkey_violations == 0)
542869a1 542 dev->z_pkey_violations = ipath_get_cr_errpkey(dd);
e28c00ad
BS		 543
544 if (pip->qkey_violations == 0)
545 dev->qkey_violations = 0;
546
34b2aafe 547 ore = pip->localphyerrors_overrunerrors;
542869a1 548 if (set_phyerrthreshold(dd, (ore >> 4) & 0xF))
e28c00ad
BS		 549 goto err;
550
542869a1 551 if (set_overrunthreshold(dd, (ore & 0xF)))
e28c00ad
BS		 552 goto err;
553
554 dev->subnet_timeout = pip->clientrereg_resv_subnetto & 0x1F;
555
556 if (pip->clientrereg_resv_subnetto & 0x80) {
557 clientrereg = 1;
6eddb5cb 558 event.event = IB_EVENT_CLIENT_REREGISTER;
e28c00ad
BS		 559 ib_dispatch_event(&event);
560 }
561
562 /*
563 * Do the port state change now that the other link parameters
564 * have been set.
565 * Changing the port physical state only makes sense if the link
566 * is down or is being set to down.
567 */
568 state = pip->linkspeed_portstate & 0xF;
e28c00ad
BS		 569 lstate = (pip->portphysstate_linkdown >> 4) & 0xF;
570 if (lstate && !(state == IB_PORT_DOWN || state == IB_PORT_NOP))
571 goto err;
572
573 /*
574 * Only state changes of DOWN, ARM, and ACTIVE are valid
575 * and must be in the correct state to take effect (see 7.2.6).
576 */
577 switch (state) {
578 case IB_PORT_NOP:
579 if (lstate == 0)
580 break;
581 /* FALLTHROUGH */
582 case IB_PORT_DOWN:
583 if (lstate == 0)
140277e9 584 lstate = IPATH_IB_LINKDOWN_ONLY;
e28c00ad
BS		 585 else if (lstate == 1)
586 lstate = IPATH_IB_LINKDOWN_SLEEP;
587 else if (lstate == 2)
588 lstate = IPATH_IB_LINKDOWN;
589 else if (lstate == 3)
590 lstate = IPATH_IB_LINKDOWN_DISABLE;
591 else
592 goto err;
542869a1 593 ipath_set_linkstate(dd, lstate);
4330e4da
MA		 594 if (lstate == IPATH_IB_LINKDOWN_DISABLE) {
595 ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
596 goto done;
597 }
140277e9
RC		 598 ipath_wait_linkstate(dd, IPATH_LINKINIT | IPATH_LINKARMED |
599 IPATH_LINKACTIVE, 1000);
e28c00ad
BS		 600 break;
601 case IB_PORT_ARMED:
542869a1 602 ipath_set_linkstate(dd, IPATH_IB_LINKARM);
e28c00ad
BS		 603 break;
604 case IB_PORT_ACTIVE:
542869a1 605 ipath_set_linkstate(dd, IPATH_IB_LINKACTIVE);
e28c00ad
BS		 606 break;
607 default:
608 /* XXX We have already partially updated our state! */
609 goto err;
610 }
611
612 ret = recv_subn_get_portinfo(smp, ibdev, port);
613
614 if (clientrereg)
615 pip->clientrereg_resv_subnetto |= 0x80;
616
617 goto done;
618
619err:
620 smp->status |= IB_SMP_INVALID_FIELD;
621 ret = recv_subn_get_portinfo(smp, ibdev, port);
622
623done:
624 return ret;
625}
626
34b2aafe
BS		 627/**
628 * rm_pkey - decrecment the reference count for the given PKEY
629 * @dd: the infinipath device
630 * @key: the PKEY index
631 *
632 * Return true if this was the last reference and the hardware table entry
633 * needs to be changed.
634 */
635static int rm_pkey(struct ipath_devdata *dd, u16 key)
636{
637 int i;
638 int ret;
639
640 for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
641 if (dd->ipath_pkeys[i] != key)
642 continue;
643 if (atomic_dec_and_test(&dd->ipath_pkeyrefs[i])) {
644 dd->ipath_pkeys[i] = 0;
645 ret = 1;
646 goto bail;
647 }
648 break;
649 }
650
651 ret = 0;
652
653bail:
654 return ret;
655}
656
657/**
658 * add_pkey - add the given PKEY to the hardware table
659 * @dd: the infinipath device
660 * @key: the PKEY
661 *
662 * Return an error code if unable to add the entry, zero if no change,
663 * or 1 if the hardware PKEY register needs to be updated.
664 */
665static int add_pkey(struct ipath_devdata *dd, u16 key)
666{
667 int i;
668 u16 lkey = key & 0x7FFF;
669 int any = 0;
670 int ret;
671
672 if (lkey == 0x7FFF) {
673 ret = 0;
674 goto bail;
675 }
676
677 /* Look for an empty slot or a matching PKEY. */
678 for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
679 if (!dd->ipath_pkeys[i]) {
680 any++;
681 continue;
682 }
683 /* If it matches exactly, try to increment the ref count */
684 if (dd->ipath_pkeys[i] == key) {
685 if (atomic_inc_return(&dd->ipath_pkeyrefs[i]) > 1) {
686 ret = 0;
687 goto bail;
688 }
689 /* Lost the race. Look for an empty slot below. */
690 atomic_dec(&dd->ipath_pkeyrefs[i]);
691 any++;
692 }
693 /*
694 * It makes no sense to have both the limited and unlimited
695 * PKEY set at the same time since the unlimited one will
696 * disable the limited one.
697 */
698 if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) {
699 ret = -EEXIST;
700 goto bail;
701 }
702 }
703 if (!any) {
704 ret = -EBUSY;
705 goto bail;
706 }
707 for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
708 if (!dd->ipath_pkeys[i] &&
709 atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
710 /* for ipathstats, etc. */
711 ipath_stats.sps_pkeys[i] = lkey;
712 dd->ipath_pkeys[i] = key;
713 ret = 1;
714 goto bail;
715 }
716 }
717 ret = -EBUSY;
718
719bail:
720 return ret;
721}
722
723/**
724 * set_pkeys - set the PKEY table for port 0
725 * @dd: the infinipath device
726 * @pkeys: the PKEY table
727 */
728static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys)
729{
730 struct ipath_portdata *pd;
731 int i;
732 int changed = 0;
733
3d089098 734 /* always a kernel port, no locking needed */
34b2aafe
BS		 735 pd = dd->ipath_pd[0];
736
737 for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
738 u16 key = pkeys[i];
739 u16 okey = pd->port_pkeys[i];
740
741 if (key == okey)
742 continue;
743 /*
744 * The value of this PKEY table entry is changing.
745 * Remove the old entry in the hardware's array of PKEYs.
746 */
747 if (okey & 0x7FFF)
748 changed |= rm_pkey(dd, okey);
749 if (key & 0x7FFF) {
750 int ret = add_pkey(dd, key);
751
752 if (ret < 0)
753 key = 0;
754 else
755 changed |= ret;
756 }
757 pd->port_pkeys[i] = key;
758 }
759 if (changed) {
760 u64 pkey;
761
762 pkey = (u64) dd->ipath_pkeys[0] |
763 ((u64) dd->ipath_pkeys[1] << 16) |
764 ((u64) dd->ipath_pkeys[2] << 32) |
765 ((u64) dd->ipath_pkeys[3] << 48);
766 ipath_cdbg(VERBOSE, "p0 new pkey reg %llx\n",
767 (unsigned long long) pkey);
768 ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
769 pkey);
770 }
771 return 0;
772}
773
e28c00ad
BS		 774static int recv_subn_set_pkeytable(struct ib_smp *smp,
775 struct ib_device *ibdev)
776{
777 u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
778 __be16 *p = (__be16 *) smp->data;
779 u16 *q = (u16 *) smp->data;
780 struct ipath_ibdev *dev = to_idev(ibdev);
34b2aafe 781 unsigned i, n = ipath_get_npkeys(dev->dd);
e28c00ad
BS		 782
783 for (i = 0; i < n; i++)
784 q[i] = be16_to_cpu(p[i]);
785
34b2aafe 786 if (startpx != 0 || set_pkeys(dev->dd, q) != 0)
e28c00ad
BS		 787 smp->status |= IB_SMP_INVALID_FIELD;
788
789 return recv_subn_get_pkeytable(smp, ibdev);
790}
791
792#define IB_PMA_CLASS_PORT_INFO __constant_htons(0x0001)
793#define IB_PMA_PORT_SAMPLES_CONTROL __constant_htons(0x0010)
794#define IB_PMA_PORT_SAMPLES_RESULT __constant_htons(0x0011)
795#define IB_PMA_PORT_COUNTERS __constant_htons(0x0012)
796#define IB_PMA_PORT_COUNTERS_EXT __constant_htons(0x001D)
797#define IB_PMA_PORT_SAMPLES_RESULT_EXT __constant_htons(0x001E)
798
799struct ib_perf {
800 u8 base_version;
801 u8 mgmt_class;
802 u8 class_version;
803 u8 method;
804 __be16 status;
805 __be16 unused;
806 __be64 tid;
807 __be16 attr_id;
808 __be16 resv;
809 __be32 attr_mod;
810 u8 reserved[40];
811 u8 data[192];
812} __attribute__ ((packed));
813
814struct ib_pma_classportinfo {
815 u8 base_version;
816 u8 class_version;
817 __be16 cap_mask;
818 u8 reserved[3];
819 u8 resp_time_value; /* only lower 5 bits */
820 union ib_gid redirect_gid;
821 __be32 redirect_tc_sl_fl; /* 8, 4, 20 bits respectively */
822 __be16 redirect_lid;
823 __be16 redirect_pkey;
824 __be32 redirect_qp; /* only lower 24 bits */
825 __be32 redirect_qkey;
826 union ib_gid trap_gid;
827 __be32 trap_tc_sl_fl; /* 8, 4, 20 bits respectively */
828 __be16 trap_lid;
829 __be16 trap_pkey;
830 __be32 trap_hl_qp; /* 8, 24 bits respectively */
831 __be32 trap_qkey;
832} __attribute__ ((packed));
833
834struct ib_pma_portsamplescontrol {
835 u8 opcode;
836 u8 port_select;
837 u8 tick;
838 u8 counter_width; /* only lower 3 bits */
839 __be32 counter_mask0_9; /* 2, 10 * 3, bits */
840 __be16 counter_mask10_14; /* 1, 5 * 3, bits */
841 u8 sample_mechanisms;
842 u8 sample_status; /* only lower 2 bits */
843 __be64 option_mask;
844 __be64 vendor_mask;
845 __be32 sample_start;
846 __be32 sample_interval;
847 __be16 tag;
848 __be16 counter_select[15];
849} __attribute__ ((packed));
850
851struct ib_pma_portsamplesresult {
852 __be16 tag;
853 __be16 sample_status; /* only lower 2 bits */
854 __be32 counter[15];
855} __attribute__ ((packed));
856
857struct ib_pma_portsamplesresult_ext {
858 __be16 tag;
859 __be16 sample_status; /* only lower 2 bits */
860 __be32 extended_width; /* only upper 2 bits */
861 __be64 counter[15];
862} __attribute__ ((packed));
863
864struct ib_pma_portcounters {
865 u8 reserved;
866 u8 port_select;
867 __be16 counter_select;
868 __be16 symbol_error_counter;
869 u8 link_error_recovery_counter;
870 u8 link_downed_counter;
871 __be16 port_rcv_errors;
872 __be16 port_rcv_remphys_errors;
873 __be16 port_rcv_switch_relay_errors;
874 __be16 port_xmit_discards;
875 u8 port_xmit_constraint_errors;
876 u8 port_rcv_constraint_errors;
877 u8 reserved1;
878 u8 lli_ebor_errors; /* 4, 4, bits */
879 __be16 reserved2;
880 __be16 vl15_dropped;
881 __be32 port_xmit_data;
882 __be32 port_rcv_data;
883 __be32 port_xmit_packets;
884 __be32 port_rcv_packets;
885} __attribute__ ((packed));
886
887#define IB_PMA_SEL_SYMBOL_ERROR __constant_htons(0x0001)
888#define IB_PMA_SEL_LINK_ERROR_RECOVERY __constant_htons(0x0002)
889#define IB_PMA_SEL_LINK_DOWNED __constant_htons(0x0004)
890#define IB_PMA_SEL_PORT_RCV_ERRORS __constant_htons(0x0008)
891#define IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS __constant_htons(0x0010)
892#define IB_PMA_SEL_PORT_XMIT_DISCARDS __constant_htons(0x0040)
fba75200
BS		 893#define IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS __constant_htons(0x0200)
894#define IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS __constant_htons(0x0400)
895#define IB_PMA_SEL_PORT_VL15_DROPPED __constant_htons(0x0800)
e28c00ad
BS		 896#define IB_PMA_SEL_PORT_XMIT_DATA __constant_htons(0x1000)
897#define IB_PMA_SEL_PORT_RCV_DATA __constant_htons(0x2000)
898#define IB_PMA_SEL_PORT_XMIT_PACKETS __constant_htons(0x4000)
899#define IB_PMA_SEL_PORT_RCV_PACKETS __constant_htons(0x8000)
900
901struct ib_pma_portcounters_ext {
902 u8 reserved;
903 u8 port_select;
904 __be16 counter_select;
905 __be32 reserved1;
906 __be64 port_xmit_data;
907 __be64 port_rcv_data;
908 __be64 port_xmit_packets;
909 __be64 port_rcv_packets;
910 __be64 port_unicast_xmit_packets;
911 __be64 port_unicast_rcv_packets;
912 __be64 port_multicast_xmit_packets;
913 __be64 port_multicast_rcv_packets;
914} __attribute__ ((packed));
915
916#define IB_PMA_SELX_PORT_XMIT_DATA __constant_htons(0x0001)
917#define IB_PMA_SELX_PORT_RCV_DATA __constant_htons(0x0002)
918#define IB_PMA_SELX_PORT_XMIT_PACKETS __constant_htons(0x0004)
919#define IB_PMA_SELX_PORT_RCV_PACKETS __constant_htons(0x0008)
920#define IB_PMA_SELX_PORT_UNI_XMIT_PACKETS __constant_htons(0x0010)
921#define IB_PMA_SELX_PORT_UNI_RCV_PACKETS __constant_htons(0x0020)
922#define IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS __constant_htons(0x0040)
923#define IB_PMA_SELX_PORT_MULTI_RCV_PACKETS __constant_htons(0x0080)
924
925static int recv_pma_get_classportinfo(struct ib_perf *pmp)
926{
927 struct ib_pma_classportinfo *p =
928 (struct ib_pma_classportinfo *)pmp->data;
929
930 memset(pmp->data, 0, sizeof(pmp->data));
931
932 if (pmp->attr_mod != 0)
933 pmp->status |= IB_SMP_INVALID_FIELD;
934
935 /* Indicate AllPortSelect is valid (only one port anyway) */
936 p->cap_mask = __constant_cpu_to_be16(1 << 8);
937 p->base_version = 1;
938 p->class_version = 1;
939 /*
940 * Expected response time is 4.096 usec. * 2^18 == 1.073741824
941 * sec.
942 */
943 p->resp_time_value = 18;
944
945 return reply((struct ib_smp *) pmp);
946}
947
948/*
949 * The PortSamplesControl.CounterMasks field is an array of 3 bit fields
950 * which specify the N'th counter's capabilities. See ch. 16.1.3.2.
951 * We support 5 counters which only count the mandatory quantities.
952 */
953#define COUNTER_MASK(q, n) (q << ((9 - n) * 3))
954#define COUNTER_MASK0_9 \
955 __constant_cpu_to_be32(COUNTER_MASK(1, 0) | \
956 COUNTER_MASK(1, 1) | \
957 COUNTER_MASK(1, 2) | \
958 COUNTER_MASK(1, 3) | \
959 COUNTER_MASK(1, 4))
960
961static int recv_pma_get_portsamplescontrol(struct ib_perf *pmp,
962 struct ib_device *ibdev, u8 port)
963{
964 struct ib_pma_portsamplescontrol *p =
965 (struct ib_pma_portsamplescontrol *)pmp->data;
966 struct ipath_ibdev *dev = to_idev(ibdev);
6c719cae 967 struct ipath_cregs const *crp = dev->dd->ipath_cregs;
e28c00ad
BS		 968 unsigned long flags;
969 u8 port_select = p->port_select;
970
971 memset(pmp->data, 0, sizeof(pmp->data));
972
973 p->port_select = port_select;
974 if (pmp->attr_mod != 0 ||
975 (port_select != port && port_select != 0xFF))
976 pmp->status |= IB_SMP_INVALID_FIELD;
977 /*
978 * Ticks are 10x the link transfer period which for 2.5Gbs is 4
979 * nsec. 0 == 4 nsec., 1 == 8 nsec., ..., 255 == 1020 nsec. Sample
980 * intervals are counted in ticks. Since we use Linux timers, that
981 * count in jiffies, we can't sample for less than 1000 ticks if HZ
a51a2513
RC		 982 * == 1000 (4000 ticks if HZ is 250). link_speed_active returns 2 for
983 * DDR, 1 for SDR, set the tick to 1 for DDR, 0 for SDR on chips that
984 * have hardware support for delaying packets.
e28c00ad 985 */
a51a2513
RC		 986 if (crp->cr_psstat)
987 p->tick = dev->dd->ipath_link_speed_active - 1;
988 else
989 p->tick = 250; /* 1 usec. */
e28c00ad
BS		 990 p->counter_width = 4; /* 32 bit counters */
991 p->counter_mask0_9 = COUNTER_MASK0_9;
992 spin_lock_irqsave(&dev->pending_lock, flags);
6c719cae
RC		 993 if (crp->cr_psstat)
994 p->sample_status = ipath_read_creg32(dev->dd, crp->cr_psstat);
995 else
996 p->sample_status = dev->pma_sample_status;
e28c00ad
BS		 997 p->sample_start = cpu_to_be32(dev->pma_sample_start);
998 p->sample_interval = cpu_to_be32(dev->pma_sample_interval);
999 p->tag = cpu_to_be16(dev->pma_tag);
1000 p->counter_select[0] = dev->pma_counter_select[0];
1001 p->counter_select[1] = dev->pma_counter_select[1];
1002 p->counter_select[2] = dev->pma_counter_select[2];
1003 p->counter_select[3] = dev->pma_counter_select[3];
1004 p->counter_select[4] = dev->pma_counter_select[4];
1005 spin_unlock_irqrestore(&dev->pending_lock, flags);
1006
1007 return reply((struct ib_smp *) pmp);
1008}
1009
1010static int recv_pma_set_portsamplescontrol(struct ib_perf *pmp,
1011 struct ib_device *ibdev, u8 port)
1012{
1013 struct ib_pma_portsamplescontrol *p =
1014 (struct ib_pma_portsamplescontrol *)pmp->data;
1015 struct ipath_ibdev *dev = to_idev(ibdev);
6c719cae 1016 struct ipath_cregs const *crp = dev->dd->ipath_cregs;
e28c00ad 1017 unsigned long flags;
6c719cae 1018 u8 status;
e28c00ad
BS		 1019 int ret;
1020
1021 if (pmp->attr_mod != 0 ||
1022 (p->port_select != port && p->port_select != 0xFF)) {
1023 pmp->status |= IB_SMP_INVALID_FIELD;
1024 ret = reply((struct ib_smp *) pmp);
1025 goto bail;
1026 }
1027
6c719cae
RC		 1028 spin_lock_irqsave(&dev->pending_lock, flags);
1029 if (crp->cr_psstat)
1030 status = ipath_read_creg32(dev->dd, crp->cr_psstat);
1031 else
1032 status = dev->pma_sample_status;
1033 if (status == IB_PMA_SAMPLE_STATUS_DONE) {
1034 dev->pma_sample_start = be32_to_cpu(p->sample_start);
1035 dev->pma_sample_interval = be32_to_cpu(p->sample_interval);
1036 dev->pma_tag = be16_to_cpu(p->tag);
1037 dev->pma_counter_select[0] = p->counter_select[0];
1038 dev->pma_counter_select[1] = p->counter_select[1];
1039 dev->pma_counter_select[2] = p->counter_select[2];
1040 dev->pma_counter_select[3] = p->counter_select[3];
1041 dev->pma_counter_select[4] = p->counter_select[4];
1042 if (crp->cr_psstat) {
1043 ipath_write_creg(dev->dd, crp->cr_psinterval,
1044 dev->pma_sample_interval);
1045 ipath_write_creg(dev->dd, crp->cr_psstart,
1046 dev->pma_sample_start);
1047 } else
1048 dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_STARTED;
e28c00ad 1049 }
6c719cae
RC		 1050 spin_unlock_irqrestore(&dev->pending_lock, flags);
1051
e28c00ad
BS		 1052 ret = recv_pma_get_portsamplescontrol(pmp, ibdev, port);
1053
1054bail:
1055 return ret;
1056}
1057
6c719cae
RC		 1058static u64 get_counter(struct ipath_ibdev *dev,
1059 struct ipath_cregs const *crp,
1060 __be16 sel)
e28c00ad
BS		 1061{
1062 u64 ret;
1063
1064 switch (sel) {
1065 case IB_PMA_PORT_XMIT_DATA:
6c719cae
RC		 1066 ret = (crp->cr_psxmitdatacount) ?
1067 ipath_read_creg32(dev->dd, crp->cr_psxmitdatacount) :
1068 dev->ipath_sword;
e28c00ad
BS		 1069 break;
1070 case IB_PMA_PORT_RCV_DATA:
6c719cae
RC		 1071 ret = (crp->cr_psrcvdatacount) ?
1072 ipath_read_creg32(dev->dd, crp->cr_psrcvdatacount) :
1073 dev->ipath_rword;
e28c00ad
BS		 1074 break;
1075 case IB_PMA_PORT_XMIT_PKTS:
6c719cae
RC		 1076 ret = (crp->cr_psxmitpktscount) ?
1077 ipath_read_creg32(dev->dd, crp->cr_psxmitpktscount) :
1078 dev->ipath_spkts;
e28c00ad
BS		 1079 break;
1080 case IB_PMA_PORT_RCV_PKTS:
6c719cae
RC		 1081 ret = (crp->cr_psrcvpktscount) ?
1082 ipath_read_creg32(dev->dd, crp->cr_psrcvpktscount) :
1083 dev->ipath_rpkts;
e28c00ad
BS		 1084 break;
1085 case IB_PMA_PORT_XMIT_WAIT:
6c719cae
RC		 1086 ret = (crp->cr_psxmitwaitcount) ?
1087 ipath_read_creg32(dev->dd, crp->cr_psxmitwaitcount) :
1088 dev->ipath_xmit_wait;
e28c00ad
BS		 1089 break;
1090 default:
1091 ret = 0;
1092 }
1093
1094 return ret;
1095}
1096
1097static int recv_pma_get_portsamplesresult(struct ib_perf *pmp,
1098 struct ib_device *ibdev)
1099{
1100 struct ib_pma_portsamplesresult *p =
1101 (struct ib_pma_portsamplesresult *)pmp->data;
1102 struct ipath_ibdev *dev = to_idev(ibdev);
6c719cae
RC		 1103 struct ipath_cregs const *crp = dev->dd->ipath_cregs;
1104 u8 status;
e28c00ad
BS		 1105 int i;
1106
1107 memset(pmp->data, 0, sizeof(pmp->data));
1108 p->tag = cpu_to_be16(dev->pma_tag);
6c719cae
RC		 1109 if (crp->cr_psstat)
1110 status = ipath_read_creg32(dev->dd, crp->cr_psstat);
1111 else
1112 status = dev->pma_sample_status;
1113 p->sample_status = cpu_to_be16(status);
e28c00ad 1114 for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
6c719cae
RC		 1115 p->counter[i] = (status != IB_PMA_SAMPLE_STATUS_DONE) ? 0 :
1116 cpu_to_be32(
1117 get_counter(dev, crp, dev->pma_counter_select[i]));
e28c00ad
BS		 1118
1119 return reply((struct ib_smp *) pmp);
1120}
1121
1122static int recv_pma_get_portsamplesresult_ext(struct ib_perf *pmp,
1123 struct ib_device *ibdev)
1124{
1125 struct ib_pma_portsamplesresult_ext *p =
1126 (struct ib_pma_portsamplesresult_ext *)pmp->data;
1127 struct ipath_ibdev *dev = to_idev(ibdev);
6c719cae
RC		 1128 struct ipath_cregs const *crp = dev->dd->ipath_cregs;
1129 u8 status;
e28c00ad
BS		 1130 int i;
1131
1132 memset(pmp->data, 0, sizeof(pmp->data));
1133 p->tag = cpu_to_be16(dev->pma_tag);
6c719cae
RC		 1134 if (crp->cr_psstat)
1135 status = ipath_read_creg32(dev->dd, crp->cr_psstat);
1136 else
1137 status = dev->pma_sample_status;
1138 p->sample_status = cpu_to_be16(status);
e28c00ad
BS		 1139 /* 64 bits */
1140 p->extended_width = __constant_cpu_to_be32(0x80000000);
1141 for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
6c719cae
RC		 1142 p->counter[i] = (status != IB_PMA_SAMPLE_STATUS_DONE) ? 0 :
1143 cpu_to_be64(
1144 get_counter(dev, crp, dev->pma_counter_select[i]));
e28c00ad
BS		 1145
1146 return reply((struct ib_smp *) pmp);
1147}
1148
1149static int recv_pma_get_portcounters(struct ib_perf *pmp,
1150 struct ib_device *ibdev, u8 port)
1151{
1152 struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1153 pmp->data;
1154 struct ipath_ibdev *dev = to_idev(ibdev);
34b2aafe 1155 struct ipath_verbs_counters cntrs;
e28c00ad
BS		 1156 u8 port_select = p->port_select;
1157
34b2aafe 1158 ipath_get_counters(dev->dd, &cntrs);
e28c00ad
BS		 1159
1160 /* Adjust counters for any resets done. */
443a64ab 1161 cntrs.symbol_error_counter -= dev->z_symbol_error_counter;
e28c00ad 1162 cntrs.link_error_recovery_counter -=
443a64ab
BS		 1163 dev->z_link_error_recovery_counter;
1164 cntrs.link_downed_counter -= dev->z_link_downed_counter;
e28c00ad 1165 cntrs.port_rcv_errors += dev->rcv_errors;
443a64ab
BS		 1166 cntrs.port_rcv_errors -= dev->z_port_rcv_errors;
1167 cntrs.port_rcv_remphys_errors -= dev->z_port_rcv_remphys_errors;
1168 cntrs.port_xmit_discards -= dev->z_port_xmit_discards;
1169 cntrs.port_xmit_data -= dev->z_port_xmit_data;
1170 cntrs.port_rcv_data -= dev->z_port_rcv_data;
1171 cntrs.port_xmit_packets -= dev->z_port_xmit_packets;
1172 cntrs.port_rcv_packets -= dev->z_port_rcv_packets;
fba75200
BS		 1173 cntrs.local_link_integrity_errors -=
1174 dev->z_local_link_integrity_errors;
1175 cntrs.excessive_buffer_overrun_errors -=
1176 dev->z_excessive_buffer_overrun_errors;
6c719cae
RC		 1177 cntrs.vl15_dropped -= dev->z_vl15_dropped;
1178 cntrs.vl15_dropped += dev->n_vl15_dropped;
e28c00ad
BS		 1179
1180 memset(pmp->data, 0, sizeof(pmp->data));
1181
1182 p->port_select = port_select;
1183 if (pmp->attr_mod != 0 ||
1184 (port_select != port && port_select != 0xFF))
1185 pmp->status |= IB_SMP_INVALID_FIELD;
1186
1187 if (cntrs.symbol_error_counter > 0xFFFFUL)
1188 p->symbol_error_counter = __constant_cpu_to_be16(0xFFFF);
1189 else
1190 p->symbol_error_counter =
1191 cpu_to_be16((u16)cntrs.symbol_error_counter);
1192 if (cntrs.link_error_recovery_counter > 0xFFUL)
1193 p->link_error_recovery_counter = 0xFF;
1194 else
1195 p->link_error_recovery_counter =
1196 (u8)cntrs.link_error_recovery_counter;
1197 if (cntrs.link_downed_counter > 0xFFUL)
1198 p->link_downed_counter = 0xFF;
1199 else
1200 p->link_downed_counter = (u8)cntrs.link_downed_counter;
1201 if (cntrs.port_rcv_errors > 0xFFFFUL)
1202 p->port_rcv_errors = __constant_cpu_to_be16(0xFFFF);
1203 else
1204 p->port_rcv_errors =
1205 cpu_to_be16((u16) cntrs.port_rcv_errors);
1206 if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
1207 p->port_rcv_remphys_errors = __constant_cpu_to_be16(0xFFFF);
1208 else
1209 p->port_rcv_remphys_errors =
1210 cpu_to_be16((u16)cntrs.port_rcv_remphys_errors);
1211 if (cntrs.port_xmit_discards > 0xFFFFUL)
1212 p->port_xmit_discards = __constant_cpu_to_be16(0xFFFF);
1213 else
1214 p->port_xmit_discards =
1215 cpu_to_be16((u16)cntrs.port_xmit_discards);
fba75200
BS		 1216 if (cntrs.local_link_integrity_errors > 0xFUL)
1217 cntrs.local_link_integrity_errors = 0xFUL;
1218 if (cntrs.excessive_buffer_overrun_errors > 0xFUL)
1219 cntrs.excessive_buffer_overrun_errors = 0xFUL;
1220 p->lli_ebor_errors = (cntrs.local_link_integrity_errors << 4) |
1221 cntrs.excessive_buffer_overrun_errors;
6c719cae 1222 if (cntrs.vl15_dropped > 0xFFFFUL)
fba75200
BS		 1223 p->vl15_dropped = __constant_cpu_to_be16(0xFFFF);
1224 else
6c719cae 1225 p->vl15_dropped = cpu_to_be16((u16)cntrs.vl15_dropped);
e28c00ad
BS		 1226 if (cntrs.port_xmit_data > 0xFFFFFFFFUL)
1227 p->port_xmit_data = __constant_cpu_to_be32(0xFFFFFFFF);
1228 else
1229 p->port_xmit_data = cpu_to_be32((u32)cntrs.port_xmit_data);
1230 if (cntrs.port_rcv_data > 0xFFFFFFFFUL)
1231 p->port_rcv_data = __constant_cpu_to_be32(0xFFFFFFFF);
1232 else
1233 p->port_rcv_data = cpu_to_be32((u32)cntrs.port_rcv_data);
1234 if (cntrs.port_xmit_packets > 0xFFFFFFFFUL)
1235 p->port_xmit_packets = __constant_cpu_to_be32(0xFFFFFFFF);
1236 else
1237 p->port_xmit_packets =
1238 cpu_to_be32((u32)cntrs.port_xmit_packets);
1239 if (cntrs.port_rcv_packets > 0xFFFFFFFFUL)
1240 p->port_rcv_packets = __constant_cpu_to_be32(0xFFFFFFFF);
1241 else
1242 p->port_rcv_packets =
1243 cpu_to_be32((u32) cntrs.port_rcv_packets);
1244
1245 return reply((struct ib_smp *) pmp);
1246}
1247
1248static int recv_pma_get_portcounters_ext(struct ib_perf *pmp,
1249 struct ib_device *ibdev, u8 port)
1250{
1251 struct ib_pma_portcounters_ext *p =
1252 (struct ib_pma_portcounters_ext *)pmp->data;
1253 struct ipath_ibdev *dev = to_idev(ibdev);
1254 u64 swords, rwords, spkts, rpkts, xwait;
1255 u8 port_select = p->port_select;
1256
34b2aafe
BS		 1257 ipath_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
1258 &rpkts, &xwait);
e28c00ad
BS		 1259
1260 /* Adjust counters for any resets done. */
443a64ab
BS		 1261 swords -= dev->z_port_xmit_data;
1262 rwords -= dev->z_port_rcv_data;
1263 spkts -= dev->z_port_xmit_packets;
1264 rpkts -= dev->z_port_rcv_packets;
e28c00ad
BS		 1265
1266 memset(pmp->data, 0, sizeof(pmp->data));
1267
1268 p->port_select = port_select;
1269 if (pmp->attr_mod != 0 ||
1270 (port_select != port && port_select != 0xFF))
1271 pmp->status |= IB_SMP_INVALID_FIELD;
1272
1273 p->port_xmit_data = cpu_to_be64(swords);
1274 p->port_rcv_data = cpu_to_be64(rwords);
1275 p->port_xmit_packets = cpu_to_be64(spkts);
1276 p->port_rcv_packets = cpu_to_be64(rpkts);
1277 p->port_unicast_xmit_packets = cpu_to_be64(dev->n_unicast_xmit);
1278 p->port_unicast_rcv_packets = cpu_to_be64(dev->n_unicast_rcv);
1279 p->port_multicast_xmit_packets = cpu_to_be64(dev->n_multicast_xmit);
1280 p->port_multicast_rcv_packets = cpu_to_be64(dev->n_multicast_rcv);
1281
1282 return reply((struct ib_smp *) pmp);
1283}
1284
1285static int recv_pma_set_portcounters(struct ib_perf *pmp,
1286 struct ib_device *ibdev, u8 port)
1287{
1288 struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1289 pmp->data;
1290 struct ipath_ibdev *dev = to_idev(ibdev);
34b2aafe 1291 struct ipath_verbs_counters cntrs;
e28c00ad
BS		 1292
1293 /*
1294 * Since the HW doesn't support clearing counters, we save the
1295 * current count and subtract it from future responses.
1296 */
34b2aafe 1297 ipath_get_counters(dev->dd, &cntrs);
e28c00ad
BS		 1298
1299 if (p->counter_select & IB_PMA_SEL_SYMBOL_ERROR)
443a64ab 1300 dev->z_symbol_error_counter = cntrs.symbol_error_counter;
e28c00ad
BS		 1301
1302 if (p->counter_select & IB_PMA_SEL_LINK_ERROR_RECOVERY)
443a64ab 1303 dev->z_link_error_recovery_counter =
e28c00ad
BS		 1304 cntrs.link_error_recovery_counter;
1305
1306 if (p->counter_select & IB_PMA_SEL_LINK_DOWNED)
443a64ab 1307 dev->z_link_downed_counter = cntrs.link_downed_counter;
e28c00ad
BS		 1308
1309 if (p->counter_select & IB_PMA_SEL_PORT_RCV_ERRORS)
443a64ab 1310 dev->z_port_rcv_errors =
e28c00ad
BS		 1311 cntrs.port_rcv_errors + dev->rcv_errors;
1312
1313 if (p->counter_select & IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS)
443a64ab 1314 dev->z_port_rcv_remphys_errors =
e28c00ad
BS		 1315 cntrs.port_rcv_remphys_errors;
1316
1317 if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DISCARDS)
443a64ab 1318 dev->z_port_xmit_discards = cntrs.port_xmit_discards;
e28c00ad 1319
fba75200
BS		 1320 if (p->counter_select & IB_PMA_SEL_LOCAL_LINK_INTEGRITY_ERRORS)
1321 dev->z_local_link_integrity_errors =
1322 cntrs.local_link_integrity_errors;
1323
1324 if (p->counter_select & IB_PMA_SEL_EXCESSIVE_BUFFER_OVERRUNS)
1325 dev->z_excessive_buffer_overrun_errors =
1326 cntrs.excessive_buffer_overrun_errors;
1327
6c719cae 1328 if (p->counter_select & IB_PMA_SEL_PORT_VL15_DROPPED) {
fba75200 1329 dev->n_vl15_dropped = 0;
6c719cae
RC		 1330 dev->z_vl15_dropped = cntrs.vl15_dropped;
1331 }
fba75200 1332
e28c00ad 1333 if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DATA)
443a64ab 1334 dev->z_port_xmit_data = cntrs.port_xmit_data;
e28c00ad
BS		 1335
1336 if (p->counter_select & IB_PMA_SEL_PORT_RCV_DATA)
443a64ab 1337 dev->z_port_rcv_data = cntrs.port_rcv_data;
e28c00ad
BS		 1338
1339 if (p->counter_select & IB_PMA_SEL_PORT_XMIT_PACKETS)
443a64ab 1340 dev->z_port_xmit_packets = cntrs.port_xmit_packets;
e28c00ad
BS		 1341
1342 if (p->counter_select & IB_PMA_SEL_PORT_RCV_PACKETS)
443a64ab 1343 dev->z_port_rcv_packets = cntrs.port_rcv_packets;
e28c00ad
BS		 1344
1345 return recv_pma_get_portcounters(pmp, ibdev, port);
1346}
1347
1348static int recv_pma_set_portcounters_ext(struct ib_perf *pmp,
1349 struct ib_device *ibdev, u8 port)
1350{
1351 struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
1352 pmp->data;
1353 struct ipath_ibdev *dev = to_idev(ibdev);
1354 u64 swords, rwords, spkts, rpkts, xwait;
1355
34b2aafe
BS		 1356 ipath_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
1357 &rpkts, &xwait);
e28c00ad
BS		 1358
1359 if (p->counter_select & IB_PMA_SELX_PORT_XMIT_DATA)
443a64ab 1360 dev->z_port_xmit_data = swords;
e28c00ad
BS		 1361
1362 if (p->counter_select & IB_PMA_SELX_PORT_RCV_DATA)
443a64ab 1363 dev->z_port_rcv_data = rwords;
e28c00ad
BS		 1364
1365 if (p->counter_select & IB_PMA_SELX_PORT_XMIT_PACKETS)
443a64ab 1366 dev->z_port_xmit_packets = spkts;
e28c00ad
BS		 1367
1368 if (p->counter_select & IB_PMA_SELX_PORT_RCV_PACKETS)
443a64ab 1369 dev->z_port_rcv_packets = rpkts;
e28c00ad
BS		 1370
1371 if (p->counter_select & IB_PMA_SELX_PORT_UNI_XMIT_PACKETS)
1372 dev->n_unicast_xmit = 0;
1373
1374 if (p->counter_select & IB_PMA_SELX_PORT_UNI_RCV_PACKETS)
1375 dev->n_unicast_rcv = 0;
1376
1377 if (p->counter_select & IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS)
1378 dev->n_multicast_xmit = 0;
1379
1380 if (p->counter_select & IB_PMA_SELX_PORT_MULTI_RCV_PACKETS)
1381 dev->n_multicast_rcv = 0;
1382
1383 return recv_pma_get_portcounters_ext(pmp, ibdev, port);
1384}
1385
1386static int process_subn(struct ib_device *ibdev, int mad_flags,
1387 u8 port_num, struct ib_mad *in_mad,
1388 struct ib_mad *out_mad)
1389{
1390 struct ib_smp *smp = (struct ib_smp *)out_mad;
1391 struct ipath_ibdev *dev = to_idev(ibdev);
1392 int ret;
1393
1394 *out_mad = *in_mad;
1395 if (smp->class_version != 1) {
1396 smp->status |= IB_SMP_UNSUP_VERSION;
1397 ret = reply(smp);
1398 goto bail;
1399 }
1400
1401 /* Is the mkey in the process of expiring? */
b3b8128f
RD		 1402 if (dev->mkey_lease_timeout &&
1403 time_after_eq(jiffies, dev->mkey_lease_timeout)) {
e28c00ad
BS		 1404 /* Clear timeout and mkey protection field. */
1405 dev->mkey_lease_timeout = 0;
542869a1 1406 dev->mkeyprot = 0;
e28c00ad
BS		 1407 }
1408
1409 /*
1410 * M_Key checking depends on
1411 * Portinfo:M_Key_protect_bits
1412 */
1413 if ((mad_flags & IB_MAD_IGNORE_MKEY) == 0 && dev->mkey != 0 &&
1414 dev->mkey != smp->mkey &&
1415 (smp->method == IB_MGMT_METHOD_SET ||
1416 (smp->method == IB_MGMT_METHOD_GET &&
542869a1 1417 dev->mkeyprot >= 2))) {
e28c00ad
BS		 1418 if (dev->mkey_violations != 0xFFFF)
1419 ++dev->mkey_violations;
1420 if (dev->mkey_lease_timeout ||
1421 dev->mkey_lease_period == 0) {
1422 ret = IB_MAD_RESULT_SUCCESS |
1423 IB_MAD_RESULT_CONSUMED;
1424 goto bail;
1425 }
1426 dev->mkey_lease_timeout = jiffies +
1427 dev->mkey_lease_period * HZ;
1428 /* Future: Generate a trap notice. */
1429 ret = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
1430 goto bail;
1431 } else if (dev->mkey_lease_timeout)
1432 dev->mkey_lease_timeout = 0;
1433
1434 switch (smp->method) {
1435 case IB_MGMT_METHOD_GET:
1436 switch (smp->attr_id) {
1437 case IB_SMP_ATTR_NODE_DESC:
1438 ret = recv_subn_get_nodedescription(smp, ibdev);
1439 goto bail;
1440 case IB_SMP_ATTR_NODE_INFO:
1441 ret = recv_subn_get_nodeinfo(smp, ibdev, port_num);
1442 goto bail;
1443 case IB_SMP_ATTR_GUID_INFO:
1444 ret = recv_subn_get_guidinfo(smp, ibdev);
1445 goto bail;
1446 case IB_SMP_ATTR_PORT_INFO:
1447 ret = recv_subn_get_portinfo(smp, ibdev, port_num);
1448 goto bail;
1449 case IB_SMP_ATTR_PKEY_TABLE:
1450 ret = recv_subn_get_pkeytable(smp, ibdev);
1451 goto bail;
1452 case IB_SMP_ATTR_SM_INFO:
1453 if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
1454 ret = IB_MAD_RESULT_SUCCESS |
1455 IB_MAD_RESULT_CONSUMED;
1456 goto bail;
1457 }
1458 if (dev->port_cap_flags & IB_PORT_SM) {
1459 ret = IB_MAD_RESULT_SUCCESS;
1460 goto bail;
1461 }
1462 /* FALLTHROUGH */
1463 default:
1464 smp->status |= IB_SMP_UNSUP_METH_ATTR;
1465 ret = reply(smp);
1466 goto bail;
1467 }
1468
1469 case IB_MGMT_METHOD_SET:
1470 switch (smp->attr_id) {
1471 case IB_SMP_ATTR_GUID_INFO:
1472 ret = recv_subn_set_guidinfo(smp, ibdev);
1473 goto bail;
1474 case IB_SMP_ATTR_PORT_INFO:
1475 ret = recv_subn_set_portinfo(smp, ibdev, port_num);
1476 goto bail;
1477 case IB_SMP_ATTR_PKEY_TABLE:
1478 ret = recv_subn_set_pkeytable(smp, ibdev);
1479 goto bail;
1480 case IB_SMP_ATTR_SM_INFO:
1481 if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
1482 ret = IB_MAD_RESULT_SUCCESS |
1483 IB_MAD_RESULT_CONSUMED;
1484 goto bail;
1485 }
1486 if (dev->port_cap_flags & IB_PORT_SM) {
1487 ret = IB_MAD_RESULT_SUCCESS;
1488 goto bail;
1489 }
1490 /* FALLTHROUGH */
1491 default:
1492 smp->status |= IB_SMP_UNSUP_METH_ATTR;
1493 ret = reply(smp);
1494 goto bail;
1495 }
1496
27676a3e
RC		 1497 case IB_MGMT_METHOD_TRAP:
1498 case IB_MGMT_METHOD_REPORT:
1499 case IB_MGMT_METHOD_REPORT_RESP:
1500 case IB_MGMT_METHOD_TRAP_REPRESS:
e28c00ad
BS		 1501 case IB_MGMT_METHOD_GET_RESP:
1502 /*
1503 * The ib_mad module will call us to process responses
1504 * before checking for other consumers.
1505 * Just tell the caller to process it normally.
1506 */
f9b40353 1507 ret = IB_MAD_RESULT_SUCCESS;
e28c00ad
BS		 1508 goto bail;
1509 default:
1510 smp->status |= IB_SMP_UNSUP_METHOD;
1511 ret = reply(smp);
1512 }
1513
1514bail:
1515 return ret;
1516}
1517
1518static int process_perf(struct ib_device *ibdev, u8 port_num,
1519 struct ib_mad *in_mad,
1520 struct ib_mad *out_mad)
1521{
1522 struct ib_perf *pmp = (struct ib_perf *)out_mad;
1523 int ret;
1524
1525 *out_mad = *in_mad;
1526 if (pmp->class_version != 1) {
1527 pmp->status |= IB_SMP_UNSUP_VERSION;
1528 ret = reply((struct ib_smp *) pmp);
1529 goto bail;
1530 }
1531
1532 switch (pmp->method) {
1533 case IB_MGMT_METHOD_GET:
1534 switch (pmp->attr_id) {
1535 case IB_PMA_CLASS_PORT_INFO:
1536 ret = recv_pma_get_classportinfo(pmp);
1537 goto bail;
1538 case IB_PMA_PORT_SAMPLES_CONTROL:
1539 ret = recv_pma_get_portsamplescontrol(pmp, ibdev,
1540 port_num);
1541 goto bail;
1542 case IB_PMA_PORT_SAMPLES_RESULT:
1543 ret = recv_pma_get_portsamplesresult(pmp, ibdev);
1544 goto bail;
1545 case IB_PMA_PORT_SAMPLES_RESULT_EXT:
1546 ret = recv_pma_get_portsamplesresult_ext(pmp,
1547 ibdev);
1548 goto bail;
1549 case IB_PMA_PORT_COUNTERS:
1550 ret = recv_pma_get_portcounters(pmp, ibdev,
1551 port_num);
1552 goto bail;
1553 case IB_PMA_PORT_COUNTERS_EXT:
1554 ret = recv_pma_get_portcounters_ext(pmp, ibdev,
1555 port_num);
1556 goto bail;
1557 default:
1558 pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1559 ret = reply((struct ib_smp *) pmp);
1560 goto bail;
1561 }
1562
1563 case IB_MGMT_METHOD_SET:
1564 switch (pmp->attr_id) {
1565 case IB_PMA_PORT_SAMPLES_CONTROL:
1566 ret = recv_pma_set_portsamplescontrol(pmp, ibdev,
1567 port_num);
1568 goto bail;
1569 case IB_PMA_PORT_COUNTERS:
1570 ret = recv_pma_set_portcounters(pmp, ibdev,
1571 port_num);
1572 goto bail;
1573 case IB_PMA_PORT_COUNTERS_EXT:
1574 ret = recv_pma_set_portcounters_ext(pmp, ibdev,
1575 port_num);
1576 goto bail;
1577 default:
1578 pmp->status |= IB_SMP_UNSUP_METH_ATTR;
1579 ret = reply((struct ib_smp *) pmp);
1580 goto bail;
1581 }
1582
1583 case IB_MGMT_METHOD_GET_RESP:
1584 /*
1585 * The ib_mad module will call us to process responses
1586 * before checking for other consumers.
1587 * Just tell the caller to process it normally.
1588 */
f9b40353 1589 ret = IB_MAD_RESULT_SUCCESS;
e28c00ad
BS		 1590 goto bail;
1591 default:
1592 pmp->status |= IB_SMP_UNSUP_METHOD;
1593 ret = reply((struct ib_smp *) pmp);
1594 }
1595
1596bail:
1597 return ret;
1598}
1599
1600/**
1601 * ipath_process_mad - process an incoming MAD packet
1602 * @ibdev: the infiniband device this packet came in on
1603 * @mad_flags: MAD flags
1604 * @port_num: the port number this packet came in on
1605 * @in_wc: the work completion entry for this packet
1606 * @in_grh: the global route header for this packet
1607 * @in_mad: the incoming MAD
1608 * @out_mad: any outgoing MAD reply
1609 *
1610 * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
1611 * interested in processing.
1612 *
1613 * Note that the verbs framework has already done the MAD sanity checks,
1614 * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
1615 * MADs.
1616 *
1617 * This is called by the ib_mad module.
1618 */
1619int ipath_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
1620 struct ib_wc *in_wc, struct ib_grh *in_grh,
1621 struct ib_mad *in_mad, struct ib_mad *out_mad)
1622{
e28c00ad
BS		 1623 int ret;
1624
e28c00ad
BS		 1625 switch (in_mad->mad_hdr.mgmt_class) {
1626 case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1627 case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1628 ret = process_subn(ibdev, mad_flags, port_num,
1629 in_mad, out_mad);
1630 goto bail;
1631 case IB_MGMT_CLASS_PERF_MGMT:
1632 ret = process_perf(ibdev, port_num, in_mad, out_mad);
1633 goto bail;
1634 default:
1635 ret = IB_MAD_RESULT_SUCCESS;
1636 }
1637
1638bail:
1639 return ret;
1640}
Linux 6.x block layer and io_uring tree(s)