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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * ISM driver for s390.
4 *
5 * Copyright IBM Corp. 2018
6 */
7#define KMSG_COMPONENT "ism"
8#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
9
10#include <linux/module.h>
11#include <linux/types.h>
12#include <linux/interrupt.h>
13#include <linux/device.h>
14#include <linux/err.h>
15#include <linux/ctype.h>
16#include <linux/processor.h>
17
18#include "ism.h"
19
20MODULE_DESCRIPTION("ISM driver for s390");
21MODULE_LICENSE("GPL");
22
23#define PCI_DEVICE_ID_IBM_ISM 0x04ED
24#define DRV_NAME "ism"
25
26static const struct pci_device_id ism_device_table[] = {
27 { PCI_VDEVICE(IBM, PCI_DEVICE_ID_IBM_ISM), 0 },
28 { 0, }
29};
30MODULE_DEVICE_TABLE(pci, ism_device_table);
31
32static debug_info_t *ism_debug_info;
33
34#define NO_CLIENT 0xff /* must be >= MAX_CLIENTS */
35static struct ism_client *clients[MAX_CLIENTS]; /* use an array rather than */
36 /* a list for fast mapping */
37static u8 max_client;
38static DEFINE_MUTEX(clients_lock);
39static bool ism_v2_capable;
40struct ism_dev_list {
41 struct list_head list;
42 struct mutex mutex; /* protects ism device list */
43};
44
45static struct ism_dev_list ism_dev_list = {
46 .list = LIST_HEAD_INIT(ism_dev_list.list),
47 .mutex = __MUTEX_INITIALIZER(ism_dev_list.mutex),
48};
49
50static void ism_setup_forwarding(struct ism_client *client, struct ism_dev *ism)
51{
52 unsigned long flags;
53
54 spin_lock_irqsave(&ism->lock, flags);
55 ism->subs[client->id] = client;
56 spin_unlock_irqrestore(&ism->lock, flags);
57}
58
59int ism_register_client(struct ism_client *client)
60{
61 struct ism_dev *ism;
62 int i, rc = -ENOSPC;
63
64 mutex_lock(&ism_dev_list.mutex);
65 mutex_lock(&clients_lock);
66 for (i = 0; i < MAX_CLIENTS; ++i) {
67 if (!clients[i]) {
68 clients[i] = client;
69 client->id = i;
70 if (i == max_client)
71 max_client++;
72 rc = 0;
73 break;
74 }
75 }
76 mutex_unlock(&clients_lock);
77
78 if (i < MAX_CLIENTS) {
79 /* initialize with all devices that we got so far */
80 list_for_each_entry(ism, &ism_dev_list.list, list) {
81 ism->priv[i] = NULL;
82 client->add(ism);
83 ism_setup_forwarding(client, ism);
84 }
85 }
86 mutex_unlock(&ism_dev_list.mutex);
87
88 return rc;
89}
90EXPORT_SYMBOL_GPL(ism_register_client);
91
92int ism_unregister_client(struct ism_client *client)
93{
94 struct ism_dev *ism;
95 unsigned long flags;
96 int rc = 0;
97
98 mutex_lock(&ism_dev_list.mutex);
99 list_for_each_entry(ism, &ism_dev_list.list, list) {
100 spin_lock_irqsave(&ism->lock, flags);
101 /* Stop forwarding IRQs and events */
102 ism->subs[client->id] = NULL;
103 for (int i = 0; i < ISM_NR_DMBS; ++i) {
104 if (ism->sba_client_arr[i] == client->id) {
105 WARN(1, "%s: attempt to unregister '%s' with registered dmb(s)\n",
106 __func__, client->name);
107 rc = -EBUSY;
108 goto err_reg_dmb;
109 }
110 }
111 spin_unlock_irqrestore(&ism->lock, flags);
112 }
113 mutex_unlock(&ism_dev_list.mutex);
114
115 mutex_lock(&clients_lock);
116 clients[client->id] = NULL;
117 if (client->id + 1 == max_client)
118 max_client--;
119 mutex_unlock(&clients_lock);
120 return rc;
121
122err_reg_dmb:
123 spin_unlock_irqrestore(&ism->lock, flags);
124 mutex_unlock(&ism_dev_list.mutex);
125 return rc;
126}
127EXPORT_SYMBOL_GPL(ism_unregister_client);
128
129static int ism_cmd(struct ism_dev *ism, void *cmd)
130{
131 struct ism_req_hdr *req = cmd;
132 struct ism_resp_hdr *resp = cmd;
133
134 __ism_write_cmd(ism, req + 1, sizeof(*req), req->len - sizeof(*req));
135 __ism_write_cmd(ism, req, 0, sizeof(*req));
136
137 WRITE_ONCE(resp->ret, ISM_ERROR);
138
139 __ism_read_cmd(ism, resp, 0, sizeof(*resp));
140 if (resp->ret) {
141 debug_text_event(ism_debug_info, 0, "cmd failure");
142 debug_event(ism_debug_info, 0, resp, sizeof(*resp));
143 goto out;
144 }
145 __ism_read_cmd(ism, resp + 1, sizeof(*resp), resp->len - sizeof(*resp));
146out:
147 return resp->ret;
148}
149
150static int ism_cmd_simple(struct ism_dev *ism, u32 cmd_code)
151{
152 union ism_cmd_simple cmd;
153
154 memset(&cmd, 0, sizeof(cmd));
155 cmd.request.hdr.cmd = cmd_code;
156 cmd.request.hdr.len = sizeof(cmd.request);
157
158 return ism_cmd(ism, &cmd);
159}
160
161static int query_info(struct ism_dev *ism)
162{
163 union ism_qi cmd;
164
165 memset(&cmd, 0, sizeof(cmd));
166 cmd.request.hdr.cmd = ISM_QUERY_INFO;
167 cmd.request.hdr.len = sizeof(cmd.request);
168
169 if (ism_cmd(ism, &cmd))
170 goto out;
171
172 debug_text_event(ism_debug_info, 3, "query info");
173 debug_event(ism_debug_info, 3, &cmd.response, sizeof(cmd.response));
174out:
175 return 0;
176}
177
178static int register_sba(struct ism_dev *ism)
179{
180 union ism_reg_sba cmd;
181 dma_addr_t dma_handle;
182 struct ism_sba *sba;
183
184 sba = dma_alloc_coherent(&ism->pdev->dev, PAGE_SIZE, &dma_handle,
185 GFP_KERNEL);
186 if (!sba)
187 return -ENOMEM;
188
189 memset(&cmd, 0, sizeof(cmd));
190 cmd.request.hdr.cmd = ISM_REG_SBA;
191 cmd.request.hdr.len = sizeof(cmd.request);
192 cmd.request.sba = dma_handle;
193
194 if (ism_cmd(ism, &cmd)) {
195 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, sba, dma_handle);
196 return -EIO;
197 }
198
199 ism->sba = sba;
200 ism->sba_dma_addr = dma_handle;
201
202 return 0;
203}
204
205static int register_ieq(struct ism_dev *ism)
206{
207 union ism_reg_ieq cmd;
208 dma_addr_t dma_handle;
209 struct ism_eq *ieq;
210
211 ieq = dma_alloc_coherent(&ism->pdev->dev, PAGE_SIZE, &dma_handle,
212 GFP_KERNEL);
213 if (!ieq)
214 return -ENOMEM;
215
216 memset(&cmd, 0, sizeof(cmd));
217 cmd.request.hdr.cmd = ISM_REG_IEQ;
218 cmd.request.hdr.len = sizeof(cmd.request);
219 cmd.request.ieq = dma_handle;
220 cmd.request.len = sizeof(*ieq);
221
222 if (ism_cmd(ism, &cmd)) {
223 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, ieq, dma_handle);
224 return -EIO;
225 }
226
227 ism->ieq = ieq;
228 ism->ieq_idx = -1;
229 ism->ieq_dma_addr = dma_handle;
230
231 return 0;
232}
233
234static int unregister_sba(struct ism_dev *ism)
235{
236 int ret;
237
238 if (!ism->sba)
239 return 0;
240
241 ret = ism_cmd_simple(ism, ISM_UNREG_SBA);
242 if (ret && ret != ISM_ERROR)
243 return -EIO;
244
245 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE,
246 ism->sba, ism->sba_dma_addr);
247
248 ism->sba = NULL;
249 ism->sba_dma_addr = 0;
250
251 return 0;
252}
253
254static int unregister_ieq(struct ism_dev *ism)
255{
256 int ret;
257
258 if (!ism->ieq)
259 return 0;
260
261 ret = ism_cmd_simple(ism, ISM_UNREG_IEQ);
262 if (ret && ret != ISM_ERROR)
263 return -EIO;
264
265 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE,
266 ism->ieq, ism->ieq_dma_addr);
267
268 ism->ieq = NULL;
269 ism->ieq_dma_addr = 0;
270
271 return 0;
272}
273
274static int ism_read_local_gid(struct ism_dev *ism)
275{
276 union ism_read_gid cmd;
277 int ret;
278
279 memset(&cmd, 0, sizeof(cmd));
280 cmd.request.hdr.cmd = ISM_READ_GID;
281 cmd.request.hdr.len = sizeof(cmd.request);
282
283 ret = ism_cmd(ism, &cmd);
284 if (ret)
285 goto out;
286
287 ism->local_gid = cmd.response.gid;
288out:
289 return ret;
290}
291
292static void ism_free_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
293{
294 clear_bit(dmb->sba_idx, ism->sba_bitmap);
295 dma_free_coherent(&ism->pdev->dev, dmb->dmb_len,
296 dmb->cpu_addr, dmb->dma_addr);
297}
298
299static int ism_alloc_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
300{
301 unsigned long bit;
302
303 if (PAGE_ALIGN(dmb->dmb_len) > dma_get_max_seg_size(&ism->pdev->dev))
304 return -EINVAL;
305
306 if (!dmb->sba_idx) {
307 bit = find_next_zero_bit(ism->sba_bitmap, ISM_NR_DMBS,
308 ISM_DMB_BIT_OFFSET);
309 if (bit == ISM_NR_DMBS)
310 return -ENOSPC;
311
312 dmb->sba_idx = bit;
313 }
314 if (dmb->sba_idx < ISM_DMB_BIT_OFFSET ||
315 test_and_set_bit(dmb->sba_idx, ism->sba_bitmap))
316 return -EINVAL;
317
318 dmb->cpu_addr = dma_alloc_coherent(&ism->pdev->dev, dmb->dmb_len,
319 &dmb->dma_addr,
320 GFP_KERNEL | __GFP_NOWARN |
321 __GFP_NOMEMALLOC | __GFP_NORETRY);
322 if (!dmb->cpu_addr)
323 clear_bit(dmb->sba_idx, ism->sba_bitmap);
324
325 return dmb->cpu_addr ? 0 : -ENOMEM;
326}
327
328int ism_register_dmb(struct ism_dev *ism, struct ism_dmb *dmb,
329 struct ism_client *client)
330{
331 union ism_reg_dmb cmd;
332 unsigned long flags;
333 int ret;
334
335 ret = ism_alloc_dmb(ism, dmb);
336 if (ret)
337 goto out;
338
339 memset(&cmd, 0, sizeof(cmd));
340 cmd.request.hdr.cmd = ISM_REG_DMB;
341 cmd.request.hdr.len = sizeof(cmd.request);
342
343 cmd.request.dmb = dmb->dma_addr;
344 cmd.request.dmb_len = dmb->dmb_len;
345 cmd.request.sba_idx = dmb->sba_idx;
346 cmd.request.vlan_valid = dmb->vlan_valid;
347 cmd.request.vlan_id = dmb->vlan_id;
348 cmd.request.rgid = dmb->rgid;
349
350 ret = ism_cmd(ism, &cmd);
351 if (ret) {
352 ism_free_dmb(ism, dmb);
353 goto out;
354 }
355 dmb->dmb_tok = cmd.response.dmb_tok;
356 spin_lock_irqsave(&ism->lock, flags);
357 ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = client->id;
358 spin_unlock_irqrestore(&ism->lock, flags);
359out:
360 return ret;
361}
362EXPORT_SYMBOL_GPL(ism_register_dmb);
363
364int ism_unregister_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
365{
366 union ism_unreg_dmb cmd;
367 unsigned long flags;
368 int ret;
369
370 memset(&cmd, 0, sizeof(cmd));
371 cmd.request.hdr.cmd = ISM_UNREG_DMB;
372 cmd.request.hdr.len = sizeof(cmd.request);
373
374 cmd.request.dmb_tok = dmb->dmb_tok;
375
376 spin_lock_irqsave(&ism->lock, flags);
377 ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = NO_CLIENT;
378 spin_unlock_irqrestore(&ism->lock, flags);
379
380 ret = ism_cmd(ism, &cmd);
381 if (ret && ret != ISM_ERROR)
382 goto out;
383
384 ism_free_dmb(ism, dmb);
385out:
386 return ret;
387}
388EXPORT_SYMBOL_GPL(ism_unregister_dmb);
389
390static int ism_add_vlan_id(struct ism_dev *ism, u64 vlan_id)
391{
392 union ism_set_vlan_id cmd;
393
394 memset(&cmd, 0, sizeof(cmd));
395 cmd.request.hdr.cmd = ISM_ADD_VLAN_ID;
396 cmd.request.hdr.len = sizeof(cmd.request);
397
398 cmd.request.vlan_id = vlan_id;
399
400 return ism_cmd(ism, &cmd);
401}
402
403static int ism_del_vlan_id(struct ism_dev *ism, u64 vlan_id)
404{
405 union ism_set_vlan_id cmd;
406
407 memset(&cmd, 0, sizeof(cmd));
408 cmd.request.hdr.cmd = ISM_DEL_VLAN_ID;
409 cmd.request.hdr.len = sizeof(cmd.request);
410
411 cmd.request.vlan_id = vlan_id;
412
413 return ism_cmd(ism, &cmd);
414}
415
416static unsigned int max_bytes(unsigned int start, unsigned int len,
417 unsigned int boundary)
418{
419 return min(boundary - (start & (boundary - 1)), len);
420}
421
422int ism_move(struct ism_dev *ism, u64 dmb_tok, unsigned int idx, bool sf,
423 unsigned int offset, void *data, unsigned int size)
424{
425 unsigned int bytes;
426 u64 dmb_req;
427 int ret;
428
429 while (size) {
430 bytes = max_bytes(offset, size, PAGE_SIZE);
431 dmb_req = ISM_CREATE_REQ(dmb_tok, idx, size == bytes ? sf : 0,
432 offset);
433
434 ret = __ism_move(ism, dmb_req, data, bytes);
435 if (ret)
436 return ret;
437
438 size -= bytes;
439 data += bytes;
440 offset += bytes;
441 }
442
443 return 0;
444}
445EXPORT_SYMBOL_GPL(ism_move);
446
447static void ism_handle_event(struct ism_dev *ism)
448{
449 struct ism_event *entry;
450 struct ism_client *clt;
451 int i;
452
453 while ((ism->ieq_idx + 1) != READ_ONCE(ism->ieq->header.idx)) {
454 if (++(ism->ieq_idx) == ARRAY_SIZE(ism->ieq->entry))
455 ism->ieq_idx = 0;
456
457 entry = &ism->ieq->entry[ism->ieq_idx];
458 debug_event(ism_debug_info, 2, entry, sizeof(*entry));
459 for (i = 0; i < max_client; ++i) {
460 clt = ism->subs[i];
461 if (clt)
462 clt->handle_event(ism, entry);
463 }
464 }
465}
466
467static irqreturn_t ism_handle_irq(int irq, void *data)
468{
469 struct ism_dev *ism = data;
470 unsigned long bit, end;
471 unsigned long *bv;
472 u16 dmbemask;
473 u8 client_id;
474
475 bv = (void *) &ism->sba->dmb_bits[ISM_DMB_WORD_OFFSET];
476 end = sizeof(ism->sba->dmb_bits) * BITS_PER_BYTE - ISM_DMB_BIT_OFFSET;
477
478 spin_lock(&ism->lock);
479 ism->sba->s = 0;
480 barrier();
481 for (bit = 0;;) {
482 bit = find_next_bit_inv(bv, end, bit);
483 if (bit >= end)
484 break;
485
486 clear_bit_inv(bit, bv);
487 dmbemask = ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET];
488 ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET] = 0;
489 barrier();
490 client_id = ism->sba_client_arr[bit];
491 if (unlikely(client_id == NO_CLIENT || !ism->subs[client_id]))
492 continue;
493 ism->subs[client_id]->handle_irq(ism, bit + ISM_DMB_BIT_OFFSET, dmbemask);
494 }
495
496 if (ism->sba->e) {
497 ism->sba->e = 0;
498 barrier();
499 ism_handle_event(ism);
500 }
501 spin_unlock(&ism->lock);
502 return IRQ_HANDLED;
503}
504
505static int ism_dev_init(struct ism_dev *ism)
506{
507 struct pci_dev *pdev = ism->pdev;
508 int i, ret;
509
510 ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);
511 if (ret <= 0)
512 goto out;
513
514 ism->sba_client_arr = kzalloc(ISM_NR_DMBS, GFP_KERNEL);
515 if (!ism->sba_client_arr)
516 goto free_vectors;
517 memset(ism->sba_client_arr, NO_CLIENT, ISM_NR_DMBS);
518
519 ret = request_irq(pci_irq_vector(pdev, 0), ism_handle_irq, 0,
520 pci_name(pdev), ism);
521 if (ret)
522 goto free_client_arr;
523
524 ret = register_sba(ism);
525 if (ret)
526 goto free_irq;
527
528 ret = register_ieq(ism);
529 if (ret)
530 goto unreg_sba;
531
532 ret = ism_read_local_gid(ism);
533 if (ret)
534 goto unreg_ieq;
535
536 if (!ism_add_vlan_id(ism, ISM_RESERVED_VLANID))
537 /* hardware is V2 capable */
538 ism_v2_capable = true;
539 else
540 ism_v2_capable = false;
541
542 mutex_lock(&ism_dev_list.mutex);
543 mutex_lock(&clients_lock);
544 for (i = 0; i < max_client; ++i) {
545 if (clients[i]) {
546 clients[i]->add(ism);
547 ism_setup_forwarding(clients[i], ism);
548 }
549 }
550 mutex_unlock(&clients_lock);
551
552 list_add(&ism->list, &ism_dev_list.list);
553 mutex_unlock(&ism_dev_list.mutex);
554
555 query_info(ism);
556 return 0;
557
558unreg_ieq:
559 unregister_ieq(ism);
560unreg_sba:
561 unregister_sba(ism);
562free_irq:
563 free_irq(pci_irq_vector(pdev, 0), ism);
564free_client_arr:
565 kfree(ism->sba_client_arr);
566free_vectors:
567 pci_free_irq_vectors(pdev);
568out:
569 return ret;
570}
571
572static int ism_probe(struct pci_dev *pdev, const struct pci_device_id *id)
573{
574 struct ism_dev *ism;
575 int ret;
576
577 ism = kzalloc(sizeof(*ism), GFP_KERNEL);
578 if (!ism)
579 return -ENOMEM;
580
581 spin_lock_init(&ism->lock);
582 dev_set_drvdata(&pdev->dev, ism);
583 ism->pdev = pdev;
584 ism->dev.parent = &pdev->dev;
585 device_initialize(&ism->dev);
586 dev_set_name(&ism->dev, dev_name(&pdev->dev));
587 ret = device_add(&ism->dev);
588 if (ret)
589 goto err_dev;
590
591 ret = pci_enable_device_mem(pdev);
592 if (ret)
593 goto err;
594
595 ret = pci_request_mem_regions(pdev, DRV_NAME);
596 if (ret)
597 goto err_disable;
598
599 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
600 if (ret)
601 goto err_resource;
602
603 dma_set_seg_boundary(&pdev->dev, SZ_1M - 1);
604 dma_set_max_seg_size(&pdev->dev, SZ_1M);
605 pci_set_master(pdev);
606
607 ret = ism_dev_init(ism);
608 if (ret)
609 goto err_resource;
610
611 return 0;
612
613err_resource:
614 pci_release_mem_regions(pdev);
615err_disable:
616 pci_disable_device(pdev);
617err:
618 device_del(&ism->dev);
619err_dev:
620 dev_set_drvdata(&pdev->dev, NULL);
621 kfree(ism);
622
623 return ret;
624}
625
626static void ism_dev_exit(struct ism_dev *ism)
627{
628 struct pci_dev *pdev = ism->pdev;
629 unsigned long flags;
630 int i;
631
632 spin_lock_irqsave(&ism->lock, flags);
633 for (i = 0; i < max_client; ++i)
634 ism->subs[i] = NULL;
635 spin_unlock_irqrestore(&ism->lock, flags);
636
637 mutex_lock(&ism_dev_list.mutex);
638 mutex_lock(&clients_lock);
639 for (i = 0; i < max_client; ++i) {
640 if (clients[i])
641 clients[i]->remove(ism);
642 }
643 mutex_unlock(&clients_lock);
644
645 if (ism_v2_capable)
646 ism_del_vlan_id(ism, ISM_RESERVED_VLANID);
647 unregister_ieq(ism);
648 unregister_sba(ism);
649 free_irq(pci_irq_vector(pdev, 0), ism);
650 kfree(ism->sba_client_arr);
651 pci_free_irq_vectors(pdev);
652 list_del_init(&ism->list);
653 mutex_unlock(&ism_dev_list.mutex);
654}
655
656static void ism_remove(struct pci_dev *pdev)
657{
658 struct ism_dev *ism = dev_get_drvdata(&pdev->dev);
659
660 ism_dev_exit(ism);
661
662 pci_release_mem_regions(pdev);
663 pci_disable_device(pdev);
664 device_del(&ism->dev);
665 dev_set_drvdata(&pdev->dev, NULL);
666 kfree(ism);
667}
668
669static struct pci_driver ism_driver = {
670 .name = DRV_NAME,
671 .id_table = ism_device_table,
672 .probe = ism_probe,
673 .remove = ism_remove,
674};
675
676static int __init ism_init(void)
677{
678 int ret;
679
680 ism_debug_info = debug_register("ism", 2, 1, 16);
681 if (!ism_debug_info)
682 return -ENODEV;
683
684 memset(clients, 0, sizeof(clients));
685 max_client = 0;
686 debug_register_view(ism_debug_info, &debug_hex_ascii_view);
687 ret = pci_register_driver(&ism_driver);
688 if (ret)
689 debug_unregister(ism_debug_info);
690
691 return ret;
692}
693
694static void __exit ism_exit(void)
695{
696 pci_unregister_driver(&ism_driver);
697 debug_unregister(ism_debug_info);
698}
699
700module_init(ism_init);
701module_exit(ism_exit);
702
703/*************************** SMC-D Implementation *****************************/
704
705#if IS_ENABLED(CONFIG_SMC)
706static int ism_query_rgid(struct ism_dev *ism, u64 rgid, u32 vid_valid,
707 u32 vid)
708{
709 union ism_query_rgid cmd;
710
711 memset(&cmd, 0, sizeof(cmd));
712 cmd.request.hdr.cmd = ISM_QUERY_RGID;
713 cmd.request.hdr.len = sizeof(cmd.request);
714
715 cmd.request.rgid = rgid;
716 cmd.request.vlan_valid = vid_valid;
717 cmd.request.vlan_id = vid;
718
719 return ism_cmd(ism, &cmd);
720}
721
722static int smcd_query_rgid(struct smcd_dev *smcd, struct smcd_gid *rgid,
723 u32 vid_valid, u32 vid)
724{
725 return ism_query_rgid(smcd->priv, rgid->gid, vid_valid, vid);
726}
727
728static int smcd_register_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb,
729 struct ism_client *client)
730{
731 return ism_register_dmb(smcd->priv, (struct ism_dmb *)dmb, client);
732}
733
734static int smcd_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
735{
736 return ism_unregister_dmb(smcd->priv, (struct ism_dmb *)dmb);
737}
738
739static int smcd_add_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
740{
741 return ism_add_vlan_id(smcd->priv, vlan_id);
742}
743
744static int smcd_del_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
745{
746 return ism_del_vlan_id(smcd->priv, vlan_id);
747}
748
749static int smcd_set_vlan_required(struct smcd_dev *smcd)
750{
751 return ism_cmd_simple(smcd->priv, ISM_SET_VLAN);
752}
753
754static int smcd_reset_vlan_required(struct smcd_dev *smcd)
755{
756 return ism_cmd_simple(smcd->priv, ISM_RESET_VLAN);
757}
758
759static int ism_signal_ieq(struct ism_dev *ism, u64 rgid, u32 trigger_irq,
760 u32 event_code, u64 info)
761{
762 union ism_sig_ieq cmd;
763
764 memset(&cmd, 0, sizeof(cmd));
765 cmd.request.hdr.cmd = ISM_SIGNAL_IEQ;
766 cmd.request.hdr.len = sizeof(cmd.request);
767
768 cmd.request.rgid = rgid;
769 cmd.request.trigger_irq = trigger_irq;
770 cmd.request.event_code = event_code;
771 cmd.request.info = info;
772
773 return ism_cmd(ism, &cmd);
774}
775
776static int smcd_signal_ieq(struct smcd_dev *smcd, struct smcd_gid *rgid,
777 u32 trigger_irq, u32 event_code, u64 info)
778{
779 return ism_signal_ieq(smcd->priv, rgid->gid,
780 trigger_irq, event_code, info);
781}
782
783static int smcd_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx,
784 bool sf, unsigned int offset, void *data,
785 unsigned int size)
786{
787 return ism_move(smcd->priv, dmb_tok, idx, sf, offset, data, size);
788}
789
790static int smcd_supports_v2(void)
791{
792 return ism_v2_capable;
793}
794
795static u64 ism_get_local_gid(struct ism_dev *ism)
796{
797 return ism->local_gid;
798}
799
800static void smcd_get_local_gid(struct smcd_dev *smcd,
801 struct smcd_gid *smcd_gid)
802{
803 smcd_gid->gid = ism_get_local_gid(smcd->priv);
804 smcd_gid->gid_ext = 0;
805}
806
807static u16 ism_get_chid(struct ism_dev *ism)
808{
809 if (!ism || !ism->pdev)
810 return 0;
811
812 return to_zpci(ism->pdev)->pchid;
813}
814
815static u16 smcd_get_chid(struct smcd_dev *smcd)
816{
817 return ism_get_chid(smcd->priv);
818}
819
820static inline struct device *smcd_get_dev(struct smcd_dev *dev)
821{
822 struct ism_dev *ism = dev->priv;
823
824 return &ism->dev;
825}
826
827static const struct smcd_ops ism_ops = {
828 .query_remote_gid = smcd_query_rgid,
829 .register_dmb = smcd_register_dmb,
830 .unregister_dmb = smcd_unregister_dmb,
831 .add_vlan_id = smcd_add_vlan_id,
832 .del_vlan_id = smcd_del_vlan_id,
833 .set_vlan_required = smcd_set_vlan_required,
834 .reset_vlan_required = smcd_reset_vlan_required,
835 .signal_event = smcd_signal_ieq,
836 .move_data = smcd_move,
837 .supports_v2 = smcd_supports_v2,
838 .get_local_gid = smcd_get_local_gid,
839 .get_chid = smcd_get_chid,
840 .get_dev = smcd_get_dev,
841};
842
843const struct smcd_ops *ism_get_smcd_ops(void)
844{
845 return &ism_ops;
846}
847EXPORT_SYMBOL_GPL(ism_get_smcd_ops);
848#endif