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Diffstat (limited to 'drivers/infiniband/hw/ehca/ehca_irq.c')
-rw-r--r--drivers/infiniband/hw/ehca/ehca_irq.c762
1 files changed, 762 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_irq.c b/drivers/infiniband/hw/ehca/ehca_irq.c
new file mode 100644
index 000000000000..2a65b5be1979
--- /dev/null
+++ b/drivers/infiniband/hw/ehca/ehca_irq.c
@@ -0,0 +1,762 @@
1/*
2 * IBM eServer eHCA Infiniband device driver for Linux on POWER
3 *
4 * Functions for EQs, NEQs and interrupts
5 *
6 * Authors: Heiko J Schick <schickhj@de.ibm.com>
7 * Khadija Souissi <souissi@de.ibm.com>
8 *
9 * Copyright (c) 2005 IBM Corporation
10 *
11 * All rights reserved.
12 *
13 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
14 * BSD.
15 *
16 * OpenIB BSD License
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions are met:
20 *
21 * Redistributions of source code must retain the above copyright notice, this
22 * list of conditions and the following disclaimer.
23 *
24 * Redistributions in binary form must reproduce the above copyright notice,
25 * this list of conditions and the following disclaimer in the documentation
26 * and/or other materials
27 * provided with the distribution.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
30 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
33 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
36 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
37 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
39 * POSSIBILITY OF SUCH DAMAGE.
40 */
41
42#include "ehca_classes.h"
43#include "ehca_irq.h"
44#include "ehca_iverbs.h"
45#include "ehca_tools.h"
46#include "hcp_if.h"
47#include "hipz_fns.h"
48
49#define EQE_COMPLETION_EVENT EHCA_BMASK_IBM(1,1)
50#define EQE_CQ_QP_NUMBER EHCA_BMASK_IBM(8,31)
51#define EQE_EE_IDENTIFIER EHCA_BMASK_IBM(2,7)
52#define EQE_CQ_NUMBER EHCA_BMASK_IBM(8,31)
53#define EQE_QP_NUMBER EHCA_BMASK_IBM(8,31)
54#define EQE_QP_TOKEN EHCA_BMASK_IBM(32,63)
55#define EQE_CQ_TOKEN EHCA_BMASK_IBM(32,63)
56
57#define NEQE_COMPLETION_EVENT EHCA_BMASK_IBM(1,1)
58#define NEQE_EVENT_CODE EHCA_BMASK_IBM(2,7)
59#define NEQE_PORT_NUMBER EHCA_BMASK_IBM(8,15)
60#define NEQE_PORT_AVAILABILITY EHCA_BMASK_IBM(16,16)
61
62#define ERROR_DATA_LENGTH EHCA_BMASK_IBM(52,63)
63#define ERROR_DATA_TYPE EHCA_BMASK_IBM(0,7)
64
65#ifdef CONFIG_INFINIBAND_EHCA_SCALING
66
67static void queue_comp_task(struct ehca_cq *__cq);
68
69static struct ehca_comp_pool* pool;
70static struct notifier_block comp_pool_callback_nb;
71
72#endif
73
74static inline void comp_event_callback(struct ehca_cq *cq)
75{
76 if (!cq->ib_cq.comp_handler)
77 return;
78
79 spin_lock(&cq->cb_lock);
80 cq->ib_cq.comp_handler(&cq->ib_cq, cq->ib_cq.cq_context);
81 spin_unlock(&cq->cb_lock);
82
83 return;
84}
85
86static void print_error_data(struct ehca_shca * shca, void* data,
87 u64* rblock, int length)
88{
89 u64 type = EHCA_BMASK_GET(ERROR_DATA_TYPE, rblock[2]);
90 u64 resource = rblock[1];
91
92 switch (type) {
93 case 0x1: /* Queue Pair */
94 {
95 struct ehca_qp *qp = (struct ehca_qp*)data;
96
97 /* only print error data if AER is set */
98 if (rblock[6] == 0)
99 return;
100
101 ehca_err(&shca->ib_device,
102 "QP 0x%x (resource=%lx) has errors.",
103 qp->ib_qp.qp_num, resource);
104 break;
105 }
106 case 0x4: /* Completion Queue */
107 {
108 struct ehca_cq *cq = (struct ehca_cq*)data;
109
110 ehca_err(&shca->ib_device,
111 "CQ 0x%x (resource=%lx) has errors.",
112 cq->cq_number, resource);
113 break;
114 }
115 default:
116 ehca_err(&shca->ib_device,
117 "Unknown errror type: %lx on %s.",
118 type, shca->ib_device.name);
119 break;
120 }
121
122 ehca_err(&shca->ib_device, "Error data is available: %lx.", resource);
123 ehca_err(&shca->ib_device, "EHCA ----- error data begin "
124 "---------------------------------------------------");
125 ehca_dmp(rblock, length, "resource=%lx", resource);
126 ehca_err(&shca->ib_device, "EHCA ----- error data end "
127 "----------------------------------------------------");
128
129 return;
130}
131
132int ehca_error_data(struct ehca_shca *shca, void *data,
133 u64 resource)
134{
135
136 unsigned long ret;
137 u64 *rblock;
138 unsigned long block_count;
139
140 rblock = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL);
141 if (!rblock) {
142 ehca_err(&shca->ib_device, "Cannot allocate rblock memory.");
143 ret = -ENOMEM;
144 goto error_data1;
145 }
146
147 ret = hipz_h_error_data(shca->ipz_hca_handle,
148 resource,
149 rblock,
150 &block_count);
151
152 if (ret == H_R_STATE) {
153 ehca_err(&shca->ib_device,
154 "No error data is available: %lx.", resource);
155 }
156 else if (ret == H_SUCCESS) {
157 int length;
158
159 length = EHCA_BMASK_GET(ERROR_DATA_LENGTH, rblock[0]);
160
161 if (length > PAGE_SIZE)
162 length = PAGE_SIZE;
163
164 print_error_data(shca, data, rblock, length);
165 }
166 else {
167 ehca_err(&shca->ib_device,
168 "Error data could not be fetched: %lx", resource);
169 }
170
171 kfree(rblock);
172
173error_data1:
174 return ret;
175
176}
177
178static void qp_event_callback(struct ehca_shca *shca,
179 u64 eqe,
180 enum ib_event_type event_type)
181{
182 struct ib_event event;
183 struct ehca_qp *qp;
184 unsigned long flags;
185 u32 token = EHCA_BMASK_GET(EQE_QP_TOKEN, eqe);
186
187 spin_lock_irqsave(&ehca_qp_idr_lock, flags);
188 qp = idr_find(&ehca_qp_idr, token);
189 spin_unlock_irqrestore(&ehca_qp_idr_lock, flags);
190
191
192 if (!qp)
193 return;
194
195 ehca_error_data(shca, qp, qp->ipz_qp_handle.handle);
196
197 if (!qp->ib_qp.event_handler)
198 return;
199
200 event.device = &shca->ib_device;
201 event.event = event_type;
202 event.element.qp = &qp->ib_qp;
203
204 qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context);
205
206 return;
207}
208
209static void cq_event_callback(struct ehca_shca *shca,
210 u64 eqe)
211{
212 struct ehca_cq *cq;
213 unsigned long flags;
214 u32 token = EHCA_BMASK_GET(EQE_CQ_TOKEN, eqe);
215
216 spin_lock_irqsave(&ehca_cq_idr_lock, flags);
217 cq = idr_find(&ehca_cq_idr, token);
218 spin_unlock_irqrestore(&ehca_cq_idr_lock, flags);
219
220 if (!cq)
221 return;
222
223 ehca_error_data(shca, cq, cq->ipz_cq_handle.handle);
224
225 return;
226}
227
228static void parse_identifier(struct ehca_shca *shca, u64 eqe)
229{
230 u8 identifier = EHCA_BMASK_GET(EQE_EE_IDENTIFIER, eqe);
231
232 switch (identifier) {
233 case 0x02: /* path migrated */
234 qp_event_callback(shca, eqe, IB_EVENT_PATH_MIG);
235 break;
236 case 0x03: /* communication established */
237 qp_event_callback(shca, eqe, IB_EVENT_COMM_EST);
238 break;
239 case 0x04: /* send queue drained */
240 qp_event_callback(shca, eqe, IB_EVENT_SQ_DRAINED);
241 break;
242 case 0x05: /* QP error */
243 case 0x06: /* QP error */
244 qp_event_callback(shca, eqe, IB_EVENT_QP_FATAL);
245 break;
246 case 0x07: /* CQ error */
247 case 0x08: /* CQ error */
248 cq_event_callback(shca, eqe);
249 break;
250 case 0x09: /* MRMWPTE error */
251 ehca_err(&shca->ib_device, "MRMWPTE error.");
252 break;
253 case 0x0A: /* port event */
254 ehca_err(&shca->ib_device, "Port event.");
255 break;
256 case 0x0B: /* MR access error */
257 ehca_err(&shca->ib_device, "MR access error.");
258 break;
259 case 0x0C: /* EQ error */
260 ehca_err(&shca->ib_device, "EQ error.");
261 break;
262 case 0x0D: /* P/Q_Key mismatch */
263 ehca_err(&shca->ib_device, "P/Q_Key mismatch.");
264 break;
265 case 0x10: /* sampling complete */
266 ehca_err(&shca->ib_device, "Sampling complete.");
267 break;
268 case 0x11: /* unaffiliated access error */
269 ehca_err(&shca->ib_device, "Unaffiliated access error.");
270 break;
271 case 0x12: /* path migrating error */
272 ehca_err(&shca->ib_device, "Path migration error.");
273 break;
274 case 0x13: /* interface trace stopped */
275 ehca_err(&shca->ib_device, "Interface trace stopped.");
276 break;
277 case 0x14: /* first error capture info available */
278 default:
279 ehca_err(&shca->ib_device, "Unknown identifier: %x on %s.",
280 identifier, shca->ib_device.name);
281 break;
282 }
283
284 return;
285}
286
287static void parse_ec(struct ehca_shca *shca, u64 eqe)
288{
289 struct ib_event event;
290 u8 ec = EHCA_BMASK_GET(NEQE_EVENT_CODE, eqe);
291 u8 port = EHCA_BMASK_GET(NEQE_PORT_NUMBER, eqe);
292
293 switch (ec) {
294 case 0x30: /* port availability change */
295 if (EHCA_BMASK_GET(NEQE_PORT_AVAILABILITY, eqe)) {
296 ehca_info(&shca->ib_device,
297 "port %x is active.", port);
298 event.device = &shca->ib_device;
299 event.event = IB_EVENT_PORT_ACTIVE;
300 event.element.port_num = port;
301 shca->sport[port - 1].port_state = IB_PORT_ACTIVE;
302 ib_dispatch_event(&event);
303 } else {
304 ehca_info(&shca->ib_device,
305 "port %x is inactive.", port);
306 event.device = &shca->ib_device;
307 event.event = IB_EVENT_PORT_ERR;
308 event.element.port_num = port;
309 shca->sport[port - 1].port_state = IB_PORT_DOWN;
310 ib_dispatch_event(&event);
311 }
312 break;
313 case 0x31:
314 /* port configuration change
315 * disruptive change is caused by
316 * LID, PKEY or SM change
317 */
318 ehca_warn(&shca->ib_device,
319 "disruptive port %x configuration change", port);
320
321 ehca_info(&shca->ib_device,
322 "port %x is inactive.", port);
323 event.device = &shca->ib_device;
324 event.event = IB_EVENT_PORT_ERR;
325 event.element.port_num = port;
326 shca->sport[port - 1].port_state = IB_PORT_DOWN;
327 ib_dispatch_event(&event);
328
329 ehca_info(&shca->ib_device,
330 "port %x is active.", port);
331 event.device = &shca->ib_device;
332 event.event = IB_EVENT_PORT_ACTIVE;
333 event.element.port_num = port;
334 shca->sport[port - 1].port_state = IB_PORT_ACTIVE;
335 ib_dispatch_event(&event);
336 break;
337 case 0x32: /* adapter malfunction */
338 ehca_err(&shca->ib_device, "Adapter malfunction.");
339 break;
340 case 0x33: /* trace stopped */
341 ehca_err(&shca->ib_device, "Traced stopped.");
342 break;
343 default:
344 ehca_err(&shca->ib_device, "Unknown event code: %x on %s.",
345 ec, shca->ib_device.name);
346 break;
347 }
348
349 return;
350}
351
352static inline void reset_eq_pending(struct ehca_cq *cq)
353{
354 u64 CQx_EP;
355 struct h_galpa gal = cq->galpas.kernel;
356
357 hipz_galpa_store_cq(gal, cqx_ep, 0x0);
358 CQx_EP = hipz_galpa_load(gal, CQTEMM_OFFSET(cqx_ep));
359
360 return;
361}
362
363irqreturn_t ehca_interrupt_neq(int irq, void *dev_id, struct pt_regs *regs)
364{
365 struct ehca_shca *shca = (struct ehca_shca*)dev_id;
366
367 tasklet_hi_schedule(&shca->neq.interrupt_task);
368
369 return IRQ_HANDLED;
370}
371
372void ehca_tasklet_neq(unsigned long data)
373{
374 struct ehca_shca *shca = (struct ehca_shca*)data;
375 struct ehca_eqe *eqe;
376 u64 ret;
377
378 eqe = (struct ehca_eqe *)ehca_poll_eq(shca, &shca->neq);
379
380 while (eqe) {
381 if (!EHCA_BMASK_GET(NEQE_COMPLETION_EVENT, eqe->entry))
382 parse_ec(shca, eqe->entry);
383
384 eqe = (struct ehca_eqe *)ehca_poll_eq(shca, &shca->neq);
385 }
386
387 ret = hipz_h_reset_event(shca->ipz_hca_handle,
388 shca->neq.ipz_eq_handle, 0xFFFFFFFFFFFFFFFFL);
389
390 if (ret != H_SUCCESS)
391 ehca_err(&shca->ib_device, "Can't clear notification events.");
392
393 return;
394}
395
396irqreturn_t ehca_interrupt_eq(int irq, void *dev_id, struct pt_regs *regs)
397{
398 struct ehca_shca *shca = (struct ehca_shca*)dev_id;
399
400 tasklet_hi_schedule(&shca->eq.interrupt_task);
401
402 return IRQ_HANDLED;
403}
404
405void ehca_tasklet_eq(unsigned long data)
406{
407 struct ehca_shca *shca = (struct ehca_shca*)data;
408 struct ehca_eqe *eqe;
409 int int_state;
410 int query_cnt = 0;
411
412 do {
413 eqe = (struct ehca_eqe *)ehca_poll_eq(shca, &shca->eq);
414
415 if ((shca->hw_level >= 2) && eqe)
416 int_state = 1;
417 else
418 int_state = 0;
419
420 while ((int_state == 1) || eqe) {
421 while (eqe) {
422 u64 eqe_value = eqe->entry;
423
424 ehca_dbg(&shca->ib_device,
425 "eqe_value=%lx", eqe_value);
426
427 /* TODO: better structure */
428 if (EHCA_BMASK_GET(EQE_COMPLETION_EVENT,
429 eqe_value)) {
430 unsigned long flags;
431 u32 token;
432 struct ehca_cq *cq;
433
434 ehca_dbg(&shca->ib_device,
435 "... completion event");
436 token =
437 EHCA_BMASK_GET(EQE_CQ_TOKEN,
438 eqe_value);
439 spin_lock_irqsave(&ehca_cq_idr_lock,
440 flags);
441 cq = idr_find(&ehca_cq_idr, token);
442
443 if (cq == NULL) {
444 spin_unlock(&ehca_cq_idr_lock);
445 break;
446 }
447
448 reset_eq_pending(cq);
449#ifdef CONFIG_INFINIBAND_EHCA_SCALING
450 queue_comp_task(cq);
451 spin_unlock_irqrestore(&ehca_cq_idr_lock,
452 flags);
453#else
454 spin_unlock_irqrestore(&ehca_cq_idr_lock,
455 flags);
456 comp_event_callback(cq);
457#endif
458 } else {
459 ehca_dbg(&shca->ib_device,
460 "... non completion event");
461 parse_identifier(shca, eqe_value);
462 }
463 eqe =
464 (struct ehca_eqe *)ehca_poll_eq(shca,
465 &shca->eq);
466 }
467
468 if (shca->hw_level >= 2) {
469 int_state =
470 hipz_h_query_int_state(shca->ipz_hca_handle,
471 shca->eq.ist);
472 query_cnt++;
473 iosync();
474 if (query_cnt >= 100) {
475 query_cnt = 0;
476 int_state = 0;
477 }
478 }
479 eqe = (struct ehca_eqe *)ehca_poll_eq(shca, &shca->eq);
480
481 }
482 } while (int_state != 0);
483
484 return;
485}
486
487#ifdef CONFIG_INFINIBAND_EHCA_SCALING
488
489static inline int find_next_online_cpu(struct ehca_comp_pool* pool)
490{
491 unsigned long flags_last_cpu;
492
493 if (ehca_debug_level)
494 ehca_dmp(&cpu_online_map, sizeof(cpumask_t), "");
495
496 spin_lock_irqsave(&pool->last_cpu_lock, flags_last_cpu);
497 pool->last_cpu = next_cpu(pool->last_cpu, cpu_online_map);
498 if (pool->last_cpu == NR_CPUS)
499 pool->last_cpu = first_cpu(cpu_online_map);
500 spin_unlock_irqrestore(&pool->last_cpu_lock, flags_last_cpu);
501
502 return pool->last_cpu;
503}
504
505static void __queue_comp_task(struct ehca_cq *__cq,
506 struct ehca_cpu_comp_task *cct)
507{
508 unsigned long flags_cct;
509 unsigned long flags_cq;
510
511 spin_lock_irqsave(&cct->task_lock, flags_cct);
512 spin_lock_irqsave(&__cq->task_lock, flags_cq);
513
514 if (__cq->nr_callbacks == 0) {
515 __cq->nr_callbacks++;
516 list_add_tail(&__cq->entry, &cct->cq_list);
517 cct->cq_jobs++;
518 wake_up(&cct->wait_queue);
519 }
520 else
521 __cq->nr_callbacks++;
522
523 spin_unlock_irqrestore(&__cq->task_lock, flags_cq);
524 spin_unlock_irqrestore(&cct->task_lock, flags_cct);
525}
526
527static void queue_comp_task(struct ehca_cq *__cq)
528{
529 int cpu;
530 int cpu_id;
531 struct ehca_cpu_comp_task *cct;
532
533 cpu = get_cpu();
534 cpu_id = find_next_online_cpu(pool);
535
536 BUG_ON(!cpu_online(cpu_id));
537
538 cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu_id);
539
540 if (cct->cq_jobs > 0) {
541 cpu_id = find_next_online_cpu(pool);
542 cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu_id);
543 }
544
545 __queue_comp_task(__cq, cct);
546
547 put_cpu();
548
549 return;
550}
551
552static void run_comp_task(struct ehca_cpu_comp_task* cct)
553{
554 struct ehca_cq *cq;
555 unsigned long flags_cct;
556 unsigned long flags_cq;
557
558 spin_lock_irqsave(&cct->task_lock, flags_cct);
559
560 while (!list_empty(&cct->cq_list)) {
561 cq = list_entry(cct->cq_list.next, struct ehca_cq, entry);
562 spin_unlock_irqrestore(&cct->task_lock, flags_cct);
563 comp_event_callback(cq);
564 spin_lock_irqsave(&cct->task_lock, flags_cct);
565
566 spin_lock_irqsave(&cq->task_lock, flags_cq);
567 cq->nr_callbacks--;
568 if (cq->nr_callbacks == 0) {
569 list_del_init(cct->cq_list.next);
570 cct->cq_jobs--;
571 }
572 spin_unlock_irqrestore(&cq->task_lock, flags_cq);
573
574 }
575
576 spin_unlock_irqrestore(&cct->task_lock, flags_cct);
577
578 return;
579}
580
581static int comp_task(void *__cct)
582{
583 struct ehca_cpu_comp_task* cct = __cct;
584 DECLARE_WAITQUEUE(wait, current);
585
586 set_current_state(TASK_INTERRUPTIBLE);
587 while(!kthread_should_stop()) {
588 add_wait_queue(&cct->wait_queue, &wait);
589
590 if (list_empty(&cct->cq_list))
591 schedule();
592 else
593 __set_current_state(TASK_RUNNING);
594
595 remove_wait_queue(&cct->wait_queue, &wait);
596
597 if (!list_empty(&cct->cq_list))
598 run_comp_task(__cct);
599
600 set_current_state(TASK_INTERRUPTIBLE);
601 }
602 __set_current_state(TASK_RUNNING);
603
604 return 0;
605}
606
607static struct task_struct *create_comp_task(struct ehca_comp_pool *pool,
608 int cpu)
609{
610 struct ehca_cpu_comp_task *cct;
611
612 cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
613 spin_lock_init(&cct->task_lock);
614 INIT_LIST_HEAD(&cct->cq_list);
615 init_waitqueue_head(&cct->wait_queue);
616 cct->task = kthread_create(comp_task, cct, "ehca_comp/%d", cpu);
617
618 return cct->task;
619}
620
621static void destroy_comp_task(struct ehca_comp_pool *pool,
622 int cpu)
623{
624 struct ehca_cpu_comp_task *cct;
625 struct task_struct *task;
626 unsigned long flags_cct;
627
628 cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
629
630 spin_lock_irqsave(&cct->task_lock, flags_cct);
631
632 task = cct->task;
633 cct->task = NULL;
634 cct->cq_jobs = 0;
635
636 spin_unlock_irqrestore(&cct->task_lock, flags_cct);
637
638 if (task)
639 kthread_stop(task);
640
641 return;
642}
643
644static void take_over_work(struct ehca_comp_pool *pool,
645 int cpu)
646{
647 struct ehca_cpu_comp_task *cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
648 LIST_HEAD(list);
649 struct ehca_cq *cq;
650 unsigned long flags_cct;
651
652 spin_lock_irqsave(&cct->task_lock, flags_cct);
653
654 list_splice_init(&cct->cq_list, &list);
655
656 while(!list_empty(&list)) {
657 cq = list_entry(cct->cq_list.next, struct ehca_cq, entry);
658
659 list_del(&cq->entry);
660 __queue_comp_task(cq, per_cpu_ptr(pool->cpu_comp_tasks,
661 smp_processor_id()));
662 }
663
664 spin_unlock_irqrestore(&cct->task_lock, flags_cct);
665
666}
667
668static int comp_pool_callback(struct notifier_block *nfb,
669 unsigned long action,
670 void *hcpu)
671{
672 unsigned int cpu = (unsigned long)hcpu;
673 struct ehca_cpu_comp_task *cct;
674
675 switch (action) {
676 case CPU_UP_PREPARE:
677 ehca_gen_dbg("CPU: %x (CPU_PREPARE)", cpu);
678 if(!create_comp_task(pool, cpu)) {
679 ehca_gen_err("Can't create comp_task for cpu: %x", cpu);
680 return NOTIFY_BAD;
681 }
682 break;
683 case CPU_UP_CANCELED:
684 ehca_gen_dbg("CPU: %x (CPU_CANCELED)", cpu);
685 cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
686 kthread_bind(cct->task, any_online_cpu(cpu_online_map));
687 destroy_comp_task(pool, cpu);
688 break;
689 case CPU_ONLINE:
690 ehca_gen_dbg("CPU: %x (CPU_ONLINE)", cpu);
691 cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
692 kthread_bind(cct->task, cpu);
693 wake_up_process(cct->task);
694 break;
695 case CPU_DOWN_PREPARE:
696 ehca_gen_dbg("CPU: %x (CPU_DOWN_PREPARE)", cpu);
697 break;
698 case CPU_DOWN_FAILED:
699 ehca_gen_dbg("CPU: %x (CPU_DOWN_FAILED)", cpu);
700 break;
701 case CPU_DEAD:
702 ehca_gen_dbg("CPU: %x (CPU_DEAD)", cpu);
703 destroy_comp_task(pool, cpu);
704 take_over_work(pool, cpu);
705 break;
706 }
707
708 return NOTIFY_OK;
709}
710
711#endif
712
713int ehca_create_comp_pool(void)
714{
715#ifdef CONFIG_INFINIBAND_EHCA_SCALING
716 int cpu;
717 struct task_struct *task;
718
719 pool = kzalloc(sizeof(struct ehca_comp_pool), GFP_KERNEL);
720 if (pool == NULL)
721 return -ENOMEM;
722
723 spin_lock_init(&pool->last_cpu_lock);
724 pool->last_cpu = any_online_cpu(cpu_online_map);
725
726 pool->cpu_comp_tasks = alloc_percpu(struct ehca_cpu_comp_task);
727 if (pool->cpu_comp_tasks == NULL) {
728 kfree(pool);
729 return -EINVAL;
730 }
731
732 for_each_online_cpu(cpu) {
733 task = create_comp_task(pool, cpu);
734 if (task) {
735 kthread_bind(task, cpu);
736 wake_up_process(task);
737 }
738 }
739
740 comp_pool_callback_nb.notifier_call = comp_pool_callback;
741 comp_pool_callback_nb.priority =0;
742 register_cpu_notifier(&comp_pool_callback_nb);
743#endif
744
745 return 0;
746}
747
748void ehca_destroy_comp_pool(void)
749{
750#ifdef CONFIG_INFINIBAND_EHCA_SCALING
751 int i;
752
753 unregister_cpu_notifier(&comp_pool_callback_nb);
754
755 for (i = 0; i < NR_CPUS; i++) {
756 if (cpu_online(i))
757 destroy_comp_task(pool, i);
758 }
759#endif
760
761 return;
762}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-04 02:16:30 -0500