summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/hw/ocrdma/ocrdma_main.c
blob: 1a8a945efa60e8fdb6683572d0d39e77f7dba36f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
/*******************************************************************
 * This file is part of the Emulex RoCE Device Driver for          *
 * RoCE (RDMA over Converged Ethernet) adapters.                   *
 * Copyright (C) 2008-2012 Emulex. All rights reserved.            *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *
 * Contact Information:
 * linux-drivers@emulex.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 *******************************************************************/

#include <linux/module.h>
#include <linux/idr.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_addr.h>

#include <linux/netdevice.h>
#include <net/addrconf.h>

#include "ocrdma.h"
#include "ocrdma_verbs.h"
#include "ocrdma_ah.h"
#include "be_roce.h"
#include "ocrdma_hw.h"
#include "ocrdma_abi.h"

MODULE_VERSION(OCRDMA_ROCE_DEV_VERSION);
MODULE_DESCRIPTION("Emulex RoCE HCA Driver");
MODULE_AUTHOR("Emulex Corporation");
MODULE_LICENSE("GPL");

static LIST_HEAD(ocrdma_dev_list);
static DEFINE_SPINLOCK(ocrdma_devlist_lock);
static DEFINE_IDR(ocrdma_dev_id);

static union ib_gid ocrdma_zero_sgid;

void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
{
	u8 mac_addr[6];

	memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
	guid[0] = mac_addr[0] ^ 2;
	guid[1] = mac_addr[1];
	guid[2] = mac_addr[2];
	guid[3] = 0xff;
	guid[4] = 0xfe;
	guid[5] = mac_addr[3];
	guid[6] = mac_addr[4];
	guid[7] = mac_addr[5];
}

static bool ocrdma_add_sgid(struct ocrdma_dev *dev, union ib_gid *new_sgid)
{
	int i;
	unsigned long flags;

	memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid));


	spin_lock_irqsave(&dev->sgid_lock, flags);
	for (i = 0; i < OCRDMA_MAX_SGID; i++) {
		if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid,
			    sizeof(union ib_gid))) {
			/* found free entry */
			memcpy(&dev->sgid_tbl[i], new_sgid,
			       sizeof(union ib_gid));
			spin_unlock_irqrestore(&dev->sgid_lock, flags);
			return true;
		} else if (!memcmp(&dev->sgid_tbl[i], new_sgid,
				   sizeof(union ib_gid))) {
			/* entry already present, no addition is required. */
			spin_unlock_irqrestore(&dev->sgid_lock, flags);
			return false;
		}
	}
	spin_unlock_irqrestore(&dev->sgid_lock, flags);
	return false;
}

static bool ocrdma_del_sgid(struct ocrdma_dev *dev, union ib_gid *sgid)
{
	int found = false;
	int i;
	unsigned long flags;


	spin_lock_irqsave(&dev->sgid_lock, flags);
	/* first is default sgid, which cannot be deleted. */
	for (i = 1; i < OCRDMA_MAX_SGID; i++) {
		if (!memcmp(&dev->sgid_tbl[i], sgid, sizeof(union ib_gid))) {
			/* found matching entry */
			memset(&dev->sgid_tbl[i], 0, sizeof(union ib_gid));
			found = true;
			break;
		}
	}
	spin_unlock_irqrestore(&dev->sgid_lock, flags);
	return found;
}

static int ocrdma_addr_event(unsigned long event, struct net_device *netdev,
			     union ib_gid *gid)
{
	struct ib_event gid_event;
	struct ocrdma_dev *dev;
	bool found = false;
	bool updated = false;
	bool is_vlan = false;

	is_vlan = netdev->priv_flags & IFF_802_1Q_VLAN;
	if (is_vlan)
		netdev = rdma_vlan_dev_real_dev(netdev);

	rcu_read_lock();
	list_for_each_entry_rcu(dev, &ocrdma_dev_list, entry) {
		if (dev->nic_info.netdev == netdev) {
			found = true;
			break;
		}
	}
	rcu_read_unlock();

	if (!found)
		return NOTIFY_DONE;

	mutex_lock(&dev->dev_lock);
	switch (event) {
	case NETDEV_UP:
		updated = ocrdma_add_sgid(dev, gid);
		break;
	case NETDEV_DOWN:
		updated = ocrdma_del_sgid(dev, gid);
		break;
	default:
		break;
	}
	if (updated) {
		/* GID table updated, notify the consumers about it */
		gid_event.device = &dev->ibdev;
		gid_event.element.port_num = 1;
		gid_event.event = IB_EVENT_GID_CHANGE;
		ib_dispatch_event(&gid_event);
	}
	mutex_unlock(&dev->dev_lock);
	return NOTIFY_OK;
}

static int ocrdma_inetaddr_event(struct notifier_block *notifier,
				  unsigned long event, void *ptr)
{
	struct in_ifaddr *ifa = ptr;
	union ib_gid gid;
	struct net_device *netdev = ifa->ifa_dev->dev;

	ipv6_addr_set_v4mapped(ifa->ifa_address, (struct in6_addr *)&gid);
	return ocrdma_addr_event(event, netdev, &gid);
}

static struct notifier_block ocrdma_inetaddr_notifier = {
	.notifier_call = ocrdma_inetaddr_event
};

#if IS_ENABLED(CONFIG_IPV6)

static int ocrdma_inet6addr_event(struct notifier_block *notifier,
				  unsigned long event, void *ptr)
{
	struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
	union  ib_gid *gid = (union ib_gid *)&ifa->addr;
	struct net_device *netdev = ifa->idev->dev;
	return ocrdma_addr_event(event, netdev, gid);
}

static struct notifier_block ocrdma_inet6addr_notifier = {
	.notifier_call = ocrdma_inet6addr_event
};

#endif /* IPV6 and VLAN */

static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
					      u8 port_num)
{
	return IB_LINK_LAYER_ETHERNET;
}

static int ocrdma_register_device(struct ocrdma_dev *dev)
{
	strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
	ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
	memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
	       sizeof(OCRDMA_NODE_DESC));
	dev->ibdev.owner = THIS_MODULE;
	dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION;
	dev->ibdev.uverbs_cmd_mask =
	    OCRDMA_UVERBS(GET_CONTEXT) |
	    OCRDMA_UVERBS(QUERY_DEVICE) |
	    OCRDMA_UVERBS(QUERY_PORT) |
	    OCRDMA_UVERBS(ALLOC_PD) |
	    OCRDMA_UVERBS(DEALLOC_PD) |
	    OCRDMA_UVERBS(REG_MR) |
	    OCRDMA_UVERBS(DEREG_MR) |
	    OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
	    OCRDMA_UVERBS(CREATE_CQ) |
	    OCRDMA_UVERBS(RESIZE_CQ) |
	    OCRDMA_UVERBS(DESTROY_CQ) |
	    OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
	    OCRDMA_UVERBS(CREATE_QP) |
	    OCRDMA_UVERBS(MODIFY_QP) |
	    OCRDMA_UVERBS(QUERY_QP) |
	    OCRDMA_UVERBS(DESTROY_QP) |
	    OCRDMA_UVERBS(POLL_CQ) |
	    OCRDMA_UVERBS(POST_SEND) |
	    OCRDMA_UVERBS(POST_RECV);

	dev->ibdev.uverbs_cmd_mask |=
	    OCRDMA_UVERBS(CREATE_AH) |
	     OCRDMA_UVERBS(MODIFY_AH) |
	     OCRDMA_UVERBS(QUERY_AH) |
	     OCRDMA_UVERBS(DESTROY_AH);

	dev->ibdev.node_type = RDMA_NODE_IB_CA;
	dev->ibdev.phys_port_cnt = 1;
	dev->ibdev.num_comp_vectors = 1;

	/* mandatory verbs. */
	dev->ibdev.query_device = ocrdma_query_device;
	dev->ibdev.query_port = ocrdma_query_port;
	dev->ibdev.modify_port = ocrdma_modify_port;
	dev->ibdev.query_gid = ocrdma_query_gid;
	dev->ibdev.get_link_layer = ocrdma_link_layer;
	dev->ibdev.alloc_pd = ocrdma_alloc_pd;
	dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;

	dev->ibdev.create_cq = ocrdma_create_cq;
	dev->ibdev.destroy_cq = ocrdma_destroy_cq;
	dev->ibdev.resize_cq = ocrdma_resize_cq;

	dev->ibdev.create_qp = ocrdma_create_qp;
	dev->ibdev.modify_qp = ocrdma_modify_qp;
	dev->ibdev.query_qp = ocrdma_query_qp;
	dev->ibdev.destroy_qp = ocrdma_destroy_qp;

	dev->ibdev.query_pkey = ocrdma_query_pkey;
	dev->ibdev.create_ah = ocrdma_create_ah;
	dev->ibdev.destroy_ah = ocrdma_destroy_ah;
	dev->ibdev.query_ah = ocrdma_query_ah;
	dev->ibdev.modify_ah = ocrdma_modify_ah;

	dev->ibdev.poll_cq = ocrdma_poll_cq;
	dev->ibdev.post_send = ocrdma_post_send;
	dev->ibdev.post_recv = ocrdma_post_recv;
	dev->ibdev.req_notify_cq = ocrdma_arm_cq;

	dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
	dev->ibdev.reg_phys_mr = ocrdma_reg_kernel_mr;
	dev->ibdev.dereg_mr = ocrdma_dereg_mr;
	dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;

	dev->ibdev.alloc_fast_reg_mr = ocrdma_alloc_frmr;
	dev->ibdev.alloc_fast_reg_page_list = ocrdma_alloc_frmr_page_list;
	dev->ibdev.free_fast_reg_page_list = ocrdma_free_frmr_page_list;

	/* mandatory to support user space verbs consumer. */
	dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
	dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
	dev->ibdev.mmap = ocrdma_mmap;
	dev->ibdev.dma_device = &dev->nic_info.pdev->dev;

	dev->ibdev.process_mad = ocrdma_process_mad;

	if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
		dev->ibdev.uverbs_cmd_mask |=
		     OCRDMA_UVERBS(CREATE_SRQ) |
		     OCRDMA_UVERBS(MODIFY_SRQ) |
		     OCRDMA_UVERBS(QUERY_SRQ) |
		     OCRDMA_UVERBS(DESTROY_SRQ) |
		     OCRDMA_UVERBS(POST_SRQ_RECV);

		dev->ibdev.create_srq = ocrdma_create_srq;
		dev->ibdev.modify_srq = ocrdma_modify_srq;
		dev->ibdev.query_srq = ocrdma_query_srq;
		dev->ibdev.destroy_srq = ocrdma_destroy_srq;
		dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
	}
	return ib_register_device(&dev->ibdev, NULL);
}

static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
{
	mutex_init(&dev->dev_lock);
	dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
				OCRDMA_MAX_SGID, GFP_KERNEL);
	if (!dev->sgid_tbl)
		goto alloc_err;
	spin_lock_init(&dev->sgid_lock);

	dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
			      OCRDMA_MAX_CQ, GFP_KERNEL);
	if (!dev->cq_tbl)
		goto alloc_err;

	if (dev->attr.max_qp) {
		dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
				      OCRDMA_MAX_QP, GFP_KERNEL);
		if (!dev->qp_tbl)
			goto alloc_err;
	}
	spin_lock_init(&dev->av_tbl.lock);
	spin_lock_init(&dev->flush_q_lock);
	return 0;
alloc_err:
	pr_err("%s(%d) error.\n", __func__, dev->id);
	return -ENOMEM;
}

static void ocrdma_free_resources(struct ocrdma_dev *dev)
{
	kfree(dev->qp_tbl);
	kfree(dev->cq_tbl);
	kfree(dev->sgid_tbl);
}

static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
{
	int status = 0;
	struct ocrdma_dev *dev;

	dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
	if (!dev) {
		pr_err("Unable to allocate ib device\n");
		return NULL;
	}
	dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
	if (!dev->mbx_cmd)
		goto idr_err;

	memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
	dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
	if (dev->id < 0)
		goto idr_err;

	status = ocrdma_init_hw(dev);
	if (status)
		goto init_err;

	status = ocrdma_alloc_resources(dev);
	if (status)
		goto alloc_err;

	status = ocrdma_register_device(dev);
	if (status)
		goto alloc_err;

	spin_lock(&ocrdma_devlist_lock);
	list_add_tail_rcu(&dev->entry, &ocrdma_dev_list);
	spin_unlock(&ocrdma_devlist_lock);
	return dev;

alloc_err:
	ocrdma_free_resources(dev);
	ocrdma_cleanup_hw(dev);
init_err:
	idr_remove(&ocrdma_dev_id, dev->id);
idr_err:
	kfree(dev->mbx_cmd);
	ib_dealloc_device(&dev->ibdev);
	pr_err("%s() leaving. ret=%d\n", __func__, status);
	return NULL;
}

static void ocrdma_remove_free(struct rcu_head *rcu)
{
	struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu);

	idr_remove(&ocrdma_dev_id, dev->id);
	kfree(dev->mbx_cmd);
	ib_dealloc_device(&dev->ibdev);
}

static void ocrdma_remove(struct ocrdma_dev *dev)
{
	/* first unregister with stack to stop all the active traffic
	 * of the registered clients.
	 */
	ib_unregister_device(&dev->ibdev);

	spin_lock(&ocrdma_devlist_lock);
	list_del_rcu(&dev->entry);
	spin_unlock(&ocrdma_devlist_lock);

	ocrdma_free_resources(dev);
	ocrdma_cleanup_hw(dev);

	call_rcu(&dev->rcu, ocrdma_remove_free);
}

static int ocrdma_open(struct ocrdma_dev *dev)
{
	struct ib_event port_event;

	port_event.event = IB_EVENT_PORT_ACTIVE;
	port_event.element.port_num = 1;
	port_event.device = &dev->ibdev;
	ib_dispatch_event(&port_event);
	return 0;
}

static int ocrdma_close(struct ocrdma_dev *dev)
{
	int i;
	struct ocrdma_qp *qp, **cur_qp;
	struct ib_event err_event;
	struct ib_qp_attr attrs;
	int attr_mask = IB_QP_STATE;

	attrs.qp_state = IB_QPS_ERR;
	mutex_lock(&dev->dev_lock);
	if (dev->qp_tbl) {
		cur_qp = dev->qp_tbl;
		for (i = 0; i < OCRDMA_MAX_QP; i++) {
			qp = cur_qp[i];
			if (qp) {
				/* change the QP state to ERROR */
				_ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask);

				err_event.event = IB_EVENT_QP_FATAL;
				err_event.element.qp = &qp->ibqp;
				err_event.device = &dev->ibdev;
				ib_dispatch_event(&err_event);
			}
		}
	}
	mutex_unlock(&dev->dev_lock);

	err_event.event = IB_EVENT_PORT_ERR;
	err_event.element.port_num = 1;
	err_event.device = &dev->ibdev;
	ib_dispatch_event(&err_event);
	return 0;
}

/* event handling via NIC driver ensures that all the NIC specific
 * initialization done before RoCE driver notifies
 * event to stack.
 */
static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
{
	switch (event) {
	case BE_DEV_UP:
		ocrdma_open(dev);
		break;
	case BE_DEV_DOWN:
		ocrdma_close(dev);
		break;
	}
}

static struct ocrdma_driver ocrdma_drv = {
	.name			= "ocrdma_driver",
	.add			= ocrdma_add,
	.remove			= ocrdma_remove,
	.state_change_handler	= ocrdma_event_handler,
};

static void ocrdma_unregister_inet6addr_notifier(void)
{
#if IS_ENABLED(CONFIG_IPV6)
	unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
#endif
}

static int __init ocrdma_init_module(void)
{
	int status;

	status = register_inetaddr_notifier(&ocrdma_inetaddr_notifier);
	if (status)
		return status;

#if IS_ENABLED(CONFIG_IPV6)
	status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
	if (status)
		return status;
#endif

	status = be_roce_register_driver(&ocrdma_drv);
	if (status)
		ocrdma_unregister_inet6addr_notifier();

	return status;
}

static void __exit ocrdma_exit_module(void)
{
	be_roce_unregister_driver(&ocrdma_drv);
	ocrdma_unregister_inet6addr_notifier();
}

module_init(ocrdma_init_module);
module_exit(ocrdma_exit_module);