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(lock: &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(lock: &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(lock: &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(lock: &ism->lock, flags);
112 }
113 mutex_unlock(lock: &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(lock: &clients_lock);
120 return rc;
121
122err_reg_dmb:
123 spin_unlock_irqrestore(lock: &ism->lock, flags);
124 mutex_unlock(lock: &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, data: req + 1, offset: sizeof(*req), len: req->len - sizeof(*req));
135 __ism_write_cmd(ism, data: req, offset: 0, len: sizeof(*req));
136
137 WRITE_ONCE(resp->ret, ISM_ERROR);
138
139 __ism_read_cmd(ism, data: resp, offset: 0, len: 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, data: resp + 1, offset: sizeof(*resp), len: 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: &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: &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(dev: &ism->pdev->dev, PAGE_SIZE, dma_handle: &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: &cmd)) {
195 dma_free_coherent(dev: &ism->pdev->dev, PAGE_SIZE, cpu_addr: 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(dev: &ism->pdev->dev, PAGE_SIZE, dma_handle: &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: &cmd)) {
223 dma_free_coherent(dev: &ism->pdev->dev, PAGE_SIZE, cpu_addr: 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(dev: &ism->pdev->dev, PAGE_SIZE,
246 cpu_addr: ism->sba, dma_handle: 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(dev: &ism->pdev->dev, PAGE_SIZE,
266 cpu_addr: ism->ieq, dma_handle: 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: &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(nr: dmb->sba_idx, addr: ism->sba_bitmap);
295 dma_unmap_page(&ism->pdev->dev, dmb->dma_addr, dmb->dmb_len,
296 DMA_FROM_DEVICE);
297 folio_put(folio: virt_to_folio(x: dmb->cpu_addr));
298}
299
300static int ism_alloc_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
301{
302 struct folio *folio;
303 unsigned long bit;
304 int rc;
305
306 if (PAGE_ALIGN(dmb->dmb_len) > dma_get_max_seg_size(dev: &ism->pdev->dev))
307 return -EINVAL;
308
309 if (!dmb->sba_idx) {
310 bit = find_next_zero_bit(addr: ism->sba_bitmap, ISM_NR_DMBS,
311 ISM_DMB_BIT_OFFSET);
312 if (bit == ISM_NR_DMBS)
313 return -ENOSPC;
314
315 dmb->sba_idx = bit;
316 }
317 if (dmb->sba_idx < ISM_DMB_BIT_OFFSET ||
318 test_and_set_bit(nr: dmb->sba_idx, addr: ism->sba_bitmap))
319 return -EINVAL;
320
321 folio = folio_alloc(GFP_KERNEL | __GFP_NOWARN | __GFP_NOMEMALLOC |
322 __GFP_NORETRY, order: get_order(size: dmb->dmb_len));
323
324 if (!folio) {
325 rc = -ENOMEM;
326 goto out_bit;
327 }
328
329 dmb->cpu_addr = folio_address(folio);
330 dmb->dma_addr = dma_map_page(&ism->pdev->dev,
331 virt_to_page(dmb->cpu_addr), 0,
332 dmb->dmb_len, DMA_FROM_DEVICE);
333 if (dma_mapping_error(dev: &ism->pdev->dev, dma_addr: dmb->dma_addr)) {
334 rc = -ENOMEM;
335 goto out_free;
336 }
337
338 return 0;
339
340out_free:
341 kfree(objp: dmb->cpu_addr);
342out_bit:
343 clear_bit(nr: dmb->sba_idx, addr: ism->sba_bitmap);
344 return rc;
345}
346
347int ism_register_dmb(struct ism_dev *ism, struct ism_dmb *dmb,
348 struct ism_client *client)
349{
350 union ism_reg_dmb cmd;
351 unsigned long flags;
352 int ret;
353
354 ret = ism_alloc_dmb(ism, dmb);
355 if (ret)
356 goto out;
357
358 memset(&cmd, 0, sizeof(cmd));
359 cmd.request.hdr.cmd = ISM_REG_DMB;
360 cmd.request.hdr.len = sizeof(cmd.request);
361
362 cmd.request.dmb = dmb->dma_addr;
363 cmd.request.dmb_len = dmb->dmb_len;
364 cmd.request.sba_idx = dmb->sba_idx;
365 cmd.request.vlan_valid = dmb->vlan_valid;
366 cmd.request.vlan_id = dmb->vlan_id;
367 cmd.request.rgid = dmb->rgid;
368
369 ret = ism_cmd(ism, cmd: &cmd);
370 if (ret) {
371 ism_free_dmb(ism, dmb);
372 goto out;
373 }
374 dmb->dmb_tok = cmd.response.dmb_tok;
375 spin_lock_irqsave(&ism->lock, flags);
376 ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = client->id;
377 spin_unlock_irqrestore(lock: &ism->lock, flags);
378out:
379 return ret;
380}
381EXPORT_SYMBOL_GPL(ism_register_dmb);
382
383int ism_unregister_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
384{
385 union ism_unreg_dmb cmd;
386 unsigned long flags;
387 int ret;
388
389 memset(&cmd, 0, sizeof(cmd));
390 cmd.request.hdr.cmd = ISM_UNREG_DMB;
391 cmd.request.hdr.len = sizeof(cmd.request);
392
393 cmd.request.dmb_tok = dmb->dmb_tok;
394
395 spin_lock_irqsave(&ism->lock, flags);
396 ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = NO_CLIENT;
397 spin_unlock_irqrestore(lock: &ism->lock, flags);
398
399 ret = ism_cmd(ism, cmd: &cmd);
400 if (ret && ret != ISM_ERROR)
401 goto out;
402
403 ism_free_dmb(ism, dmb);
404out:
405 return ret;
406}
407EXPORT_SYMBOL_GPL(ism_unregister_dmb);
408
409static int ism_add_vlan_id(struct ism_dev *ism, u64 vlan_id)
410{
411 union ism_set_vlan_id cmd;
412
413 memset(&cmd, 0, sizeof(cmd));
414 cmd.request.hdr.cmd = ISM_ADD_VLAN_ID;
415 cmd.request.hdr.len = sizeof(cmd.request);
416
417 cmd.request.vlan_id = vlan_id;
418
419 return ism_cmd(ism, cmd: &cmd);
420}
421
422static int ism_del_vlan_id(struct ism_dev *ism, u64 vlan_id)
423{
424 union ism_set_vlan_id cmd;
425
426 memset(&cmd, 0, sizeof(cmd));
427 cmd.request.hdr.cmd = ISM_DEL_VLAN_ID;
428 cmd.request.hdr.len = sizeof(cmd.request);
429
430 cmd.request.vlan_id = vlan_id;
431
432 return ism_cmd(ism, cmd: &cmd);
433}
434
435static unsigned int max_bytes(unsigned int start, unsigned int len,
436 unsigned int boundary)
437{
438 return min(boundary - (start & (boundary - 1)), len);
439}
440
441int ism_move(struct ism_dev *ism, u64 dmb_tok, unsigned int idx, bool sf,
442 unsigned int offset, void *data, unsigned int size)
443{
444 unsigned int bytes;
445 u64 dmb_req;
446 int ret;
447
448 while (size) {
449 bytes = max_bytes(start: offset, len: size, PAGE_SIZE);
450 dmb_req = ISM_CREATE_REQ(dmb_tok, idx, size == bytes ? sf : 0,
451 offset);
452
453 ret = __ism_move(ism, dmb_req, data, size: bytes);
454 if (ret)
455 return ret;
456
457 size -= bytes;
458 data += bytes;
459 offset += bytes;
460 }
461
462 return 0;
463}
464EXPORT_SYMBOL_GPL(ism_move);
465
466static void ism_handle_event(struct ism_dev *ism)
467{
468 struct ism_event *entry;
469 struct ism_client *clt;
470 int i;
471
472 while ((ism->ieq_idx + 1) != READ_ONCE(ism->ieq->header.idx)) {
473 if (++(ism->ieq_idx) == ARRAY_SIZE(ism->ieq->entry))
474 ism->ieq_idx = 0;
475
476 entry = &ism->ieq->entry[ism->ieq_idx];
477 debug_event(ism_debug_info, 2, entry, sizeof(*entry));
478 for (i = 0; i < max_client; ++i) {
479 clt = ism->subs[i];
480 if (clt)
481 clt->handle_event(ism, entry);
482 }
483 }
484}
485
486static irqreturn_t ism_handle_irq(int irq, void *data)
487{
488 struct ism_dev *ism = data;
489 unsigned long bit, end;
490 unsigned long *bv;
491 u16 dmbemask;
492 u8 client_id;
493
494 bv = (void *) &ism->sba->dmb_bits[ISM_DMB_WORD_OFFSET];
495 end = sizeof(ism->sba->dmb_bits) * BITS_PER_BYTE - ISM_DMB_BIT_OFFSET;
496
497 spin_lock(lock: &ism->lock);
498 ism->sba->s = 0;
499 barrier();
500 for (bit = 0;;) {
501 bit = find_next_bit_inv(bv, end, bit);
502 if (bit >= end)
503 break;
504
505 clear_bit_inv(bit, bv);
506 dmbemask = ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET];
507 ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET] = 0;
508 barrier();
509 client_id = ism->sba_client_arr[bit];
510 if (unlikely(client_id == NO_CLIENT || !ism->subs[client_id]))
511 continue;
512 ism->subs[client_id]->handle_irq(ism, bit + ISM_DMB_BIT_OFFSET, dmbemask);
513 }
514
515 if (ism->sba->e) {
516 ism->sba->e = 0;
517 barrier();
518 ism_handle_event(ism);
519 }
520 spin_unlock(lock: &ism->lock);
521 return IRQ_HANDLED;
522}
523
524static int ism_dev_init(struct ism_dev *ism)
525{
526 struct pci_dev *pdev = ism->pdev;
527 int i, ret;
528
529 ret = pci_alloc_irq_vectors(dev: pdev, min_vecs: 1, max_vecs: 1, PCI_IRQ_MSI);
530 if (ret <= 0)
531 goto out;
532
533 ism->sba_client_arr = kzalloc(ISM_NR_DMBS, GFP_KERNEL);
534 if (!ism->sba_client_arr)
535 goto free_vectors;
536 memset(ism->sba_client_arr, NO_CLIENT, ISM_NR_DMBS);
537
538 ret = request_irq(irq: pci_irq_vector(dev: pdev, nr: 0), handler: ism_handle_irq, flags: 0,
539 name: pci_name(pdev), dev: ism);
540 if (ret)
541 goto free_client_arr;
542
543 ret = register_sba(ism);
544 if (ret)
545 goto free_irq;
546
547 ret = register_ieq(ism);
548 if (ret)
549 goto unreg_sba;
550
551 ret = ism_read_local_gid(ism);
552 if (ret)
553 goto unreg_ieq;
554
555 if (!ism_add_vlan_id(ism, ISM_RESERVED_VLANID))
556 /* hardware is V2 capable */
557 ism_v2_capable = true;
558 else
559 ism_v2_capable = false;
560
561 mutex_lock(&ism_dev_list.mutex);
562 mutex_lock(&clients_lock);
563 for (i = 0; i < max_client; ++i) {
564 if (clients[i]) {
565 clients[i]->add(ism);
566 ism_setup_forwarding(client: clients[i], ism);
567 }
568 }
569 mutex_unlock(lock: &clients_lock);
570
571 list_add(new: &ism->list, head: &ism_dev_list.list);
572 mutex_unlock(lock: &ism_dev_list.mutex);
573
574 query_info(ism);
575 return 0;
576
577unreg_ieq:
578 unregister_ieq(ism);
579unreg_sba:
580 unregister_sba(ism);
581free_irq:
582 free_irq(pci_irq_vector(dev: pdev, nr: 0), ism);
583free_client_arr:
584 kfree(objp: ism->sba_client_arr);
585free_vectors:
586 pci_free_irq_vectors(dev: pdev);
587out:
588 return ret;
589}
590
591static int ism_probe(struct pci_dev *pdev, const struct pci_device_id *id)
592{
593 struct ism_dev *ism;
594 int ret;
595
596 ism = kzalloc(size: sizeof(*ism), GFP_KERNEL);
597 if (!ism)
598 return -ENOMEM;
599
600 spin_lock_init(&ism->lock);
601 dev_set_drvdata(dev: &pdev->dev, data: ism);
602 ism->pdev = pdev;
603 ism->dev.parent = &pdev->dev;
604 device_initialize(dev: &ism->dev);
605 dev_set_name(dev: &ism->dev, name: dev_name(dev: &pdev->dev));
606 ret = device_add(dev: &ism->dev);
607 if (ret)
608 goto err_dev;
609
610 ret = pci_enable_device_mem(dev: pdev);
611 if (ret)
612 goto err;
613
614 ret = pci_request_mem_regions(pdev, DRV_NAME);
615 if (ret)
616 goto err_disable;
617
618 ret = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(64));
619 if (ret)
620 goto err_resource;
621
622 dma_set_seg_boundary(dev: &pdev->dev, SZ_1M - 1);
623 dma_set_max_seg_size(dev: &pdev->dev, SZ_1M);
624 pci_set_master(dev: pdev);
625
626 ret = ism_dev_init(ism);
627 if (ret)
628 goto err_resource;
629
630 return 0;
631
632err_resource:
633 pci_release_mem_regions(pdev);
634err_disable:
635 pci_disable_device(dev: pdev);
636err:
637 device_del(dev: &ism->dev);
638err_dev:
639 dev_set_drvdata(dev: &pdev->dev, NULL);
640 kfree(objp: ism);
641
642 return ret;
643}
644
645static void ism_dev_exit(struct ism_dev *ism)
646{
647 struct pci_dev *pdev = ism->pdev;
648 unsigned long flags;
649 int i;
650
651 spin_lock_irqsave(&ism->lock, flags);
652 for (i = 0; i < max_client; ++i)
653 ism->subs[i] = NULL;
654 spin_unlock_irqrestore(lock: &ism->lock, flags);
655
656 mutex_lock(&ism_dev_list.mutex);
657 mutex_lock(&clients_lock);
658 for (i = 0; i < max_client; ++i) {
659 if (clients[i])
660 clients[i]->remove(ism);
661 }
662 mutex_unlock(lock: &clients_lock);
663
664 if (ism_v2_capable)
665 ism_del_vlan_id(ism, ISM_RESERVED_VLANID);
666 unregister_ieq(ism);
667 unregister_sba(ism);
668 free_irq(pci_irq_vector(dev: pdev, nr: 0), ism);
669 kfree(objp: ism->sba_client_arr);
670 pci_free_irq_vectors(dev: pdev);
671 list_del_init(entry: &ism->list);
672 mutex_unlock(lock: &ism_dev_list.mutex);
673}
674
675static void ism_remove(struct pci_dev *pdev)
676{
677 struct ism_dev *ism = dev_get_drvdata(dev: &pdev->dev);
678
679 ism_dev_exit(ism);
680
681 pci_release_mem_regions(pdev);
682 pci_disable_device(dev: pdev);
683 device_del(dev: &ism->dev);
684 dev_set_drvdata(dev: &pdev->dev, NULL);
685 kfree(objp: ism);
686}
687
688static struct pci_driver ism_driver = {
689 .name = DRV_NAME,
690 .id_table = ism_device_table,
691 .probe = ism_probe,
692 .remove = ism_remove,
693};
694
695static int __init ism_init(void)
696{
697 int ret;
698
699 ism_debug_info = debug_register("ism", 2, 1, 16);
700 if (!ism_debug_info)
701 return -ENODEV;
702
703 memset(clients, 0, sizeof(clients));
704 max_client = 0;
705 debug_register_view(ism_debug_info, &debug_hex_ascii_view);
706 ret = pci_register_driver(&ism_driver);
707 if (ret)
708 debug_unregister(ism_debug_info);
709
710 return ret;
711}
712
713static void __exit ism_exit(void)
714{
715 pci_unregister_driver(dev: &ism_driver);
716 debug_unregister(ism_debug_info);
717}
718
719module_init(ism_init);
720module_exit(ism_exit);
721
722/*************************** SMC-D Implementation *****************************/
723
724#if IS_ENABLED(CONFIG_SMC)
725static int ism_query_rgid(struct ism_dev *ism, u64 rgid, u32 vid_valid,
726 u32 vid)
727{
728 union ism_query_rgid cmd;
729
730 memset(&cmd, 0, sizeof(cmd));
731 cmd.request.hdr.cmd = ISM_QUERY_RGID;
732 cmd.request.hdr.len = sizeof(cmd.request);
733
734 cmd.request.rgid = rgid;
735 cmd.request.vlan_valid = vid_valid;
736 cmd.request.vlan_id = vid;
737
738 return ism_cmd(ism, cmd: &cmd);
739}
740
741static int smcd_query_rgid(struct smcd_dev *smcd, struct smcd_gid *rgid,
742 u32 vid_valid, u32 vid)
743{
744 return ism_query_rgid(ism: smcd->priv, rgid: rgid->gid, vid_valid, vid);
745}
746
747static int smcd_register_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb,
748 struct ism_client *client)
749{
750 return ism_register_dmb(smcd->priv, (struct ism_dmb *)dmb, client);
751}
752
753static int smcd_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
754{
755 return ism_unregister_dmb(smcd->priv, (struct ism_dmb *)dmb);
756}
757
758static int smcd_add_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
759{
760 return ism_add_vlan_id(ism: smcd->priv, vlan_id);
761}
762
763static int smcd_del_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
764{
765 return ism_del_vlan_id(ism: smcd->priv, vlan_id);
766}
767
768static int smcd_set_vlan_required(struct smcd_dev *smcd)
769{
770 return ism_cmd_simple(ism: smcd->priv, ISM_SET_VLAN);
771}
772
773static int smcd_reset_vlan_required(struct smcd_dev *smcd)
774{
775 return ism_cmd_simple(ism: smcd->priv, ISM_RESET_VLAN);
776}
777
778static int ism_signal_ieq(struct ism_dev *ism, u64 rgid, u32 trigger_irq,
779 u32 event_code, u64 info)
780{
781 union ism_sig_ieq cmd;
782
783 memset(&cmd, 0, sizeof(cmd));
784 cmd.request.hdr.cmd = ISM_SIGNAL_IEQ;
785 cmd.request.hdr.len = sizeof(cmd.request);
786
787 cmd.request.rgid = rgid;
788 cmd.request.trigger_irq = trigger_irq;
789 cmd.request.event_code = event_code;
790 cmd.request.info = info;
791
792 return ism_cmd(ism, cmd: &cmd);
793}
794
795static int smcd_signal_ieq(struct smcd_dev *smcd, struct smcd_gid *rgid,
796 u32 trigger_irq, u32 event_code, u64 info)
797{
798 return ism_signal_ieq(ism: smcd->priv, rgid: rgid->gid,
799 trigger_irq, event_code, info);
800}
801
802static int smcd_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx,
803 bool sf, unsigned int offset, void *data,
804 unsigned int size)
805{
806 return ism_move(smcd->priv, dmb_tok, idx, sf, offset, data, size);
807}
808
809static int smcd_supports_v2(void)
810{
811 return ism_v2_capable;
812}
813
814static u64 ism_get_local_gid(struct ism_dev *ism)
815{
816 return ism->local_gid;
817}
818
819static void smcd_get_local_gid(struct smcd_dev *smcd,
820 struct smcd_gid *smcd_gid)
821{
822 smcd_gid->gid = ism_get_local_gid(ism: smcd->priv);
823 smcd_gid->gid_ext = 0;
824}
825
826static u16 ism_get_chid(struct ism_dev *ism)
827{
828 if (!ism || !ism->pdev)
829 return 0;
830
831 return to_zpci(ism->pdev)->pchid;
832}
833
834static u16 smcd_get_chid(struct smcd_dev *smcd)
835{
836 return ism_get_chid(ism: smcd->priv);
837}
838
839static inline struct device *smcd_get_dev(struct smcd_dev *dev)
840{
841 struct ism_dev *ism = dev->priv;
842
843 return &ism->dev;
844}
845
846static const struct smcd_ops ism_ops = {
847 .query_remote_gid = smcd_query_rgid,
848 .register_dmb = smcd_register_dmb,
849 .unregister_dmb = smcd_unregister_dmb,
850 .add_vlan_id = smcd_add_vlan_id,
851 .del_vlan_id = smcd_del_vlan_id,
852 .set_vlan_required = smcd_set_vlan_required,
853 .reset_vlan_required = smcd_reset_vlan_required,
854 .signal_event = smcd_signal_ieq,
855 .move_data = smcd_move,
856 .supports_v2 = smcd_supports_v2,
857 .get_local_gid = smcd_get_local_gid,
858 .get_chid = smcd_get_chid,
859 .get_dev = smcd_get_dev,
860};
861
862const struct smcd_ops *ism_get_smcd_ops(void)
863{
864 return &ism_ops;
865}
866EXPORT_SYMBOL_GPL(ism_get_smcd_ops);
867#endif
868

source code of linux/drivers/s390/net/ism_drv.c