summaryrefslogtreecommitdiff
path: root/drivers/infiniband/hw/efa/efa_main.c
blob: b891ee239a675525e5efa83adab29e7bd4bb915c (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
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
/*
 * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All rights reserved.
 */

#include <linux/module.h>
#include <linux/pci.h>

#include <rdma/ib_user_verbs.h>

#include "efa.h"

#define PCI_DEV_ID_EFA_VF 0xefa0

static const struct pci_device_id efa_pci_tbl[] = {
	{ PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA_VF) },
	{ }
};

MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION(DEVICE_NAME);
MODULE_DEVICE_TABLE(pci, efa_pci_tbl);

#define EFA_REG_BAR 0
#define EFA_MEM_BAR 2
#define EFA_BASE_BAR_MASK (BIT(EFA_REG_BAR) | BIT(EFA_MEM_BAR))

#define EFA_AENQ_ENABLED_GROUPS \
	(BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
	 BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))

static void efa_update_network_attr(struct efa_dev *dev,
				    struct efa_com_get_network_attr_result *network_attr)
{
	memcpy(dev->addr, network_attr->addr, sizeof(network_attr->addr));
	dev->mtu = network_attr->mtu;

	dev_dbg(&dev->pdev->dev, "Full address %pI6\n", dev->addr);
}

/* This handler will called for unknown event group or unimplemented handlers */
static void unimplemented_aenq_handler(void *data,
				       struct efa_admin_aenq_entry *aenq_e)
{
	struct efa_dev *dev = (struct efa_dev *)data;

	ibdev_err(&dev->ibdev,
		  "Unknown event was received or event with unimplemented handler\n");
}

static void efa_keep_alive(void *data, struct efa_admin_aenq_entry *aenq_e)
{
	struct efa_dev *dev = (struct efa_dev *)data;

	atomic64_inc(&dev->stats.keep_alive_rcvd);
}

static struct efa_aenq_handlers aenq_handlers = {
	.handlers = {
		[EFA_ADMIN_KEEP_ALIVE] = efa_keep_alive,
	},
	.unimplemented_handler = unimplemented_aenq_handler
};

static void efa_release_bars(struct efa_dev *dev, int bars_mask)
{
	struct pci_dev *pdev = dev->pdev;
	int release_bars;

	release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & bars_mask;
	pci_release_selected_regions(pdev, release_bars);
}

static irqreturn_t efa_intr_msix_mgmnt(int irq, void *data)
{
	struct efa_dev *dev = data;

	efa_com_admin_q_comp_intr_handler(&dev->edev);
	efa_com_aenq_intr_handler(&dev->edev, data);

	return IRQ_HANDLED;
}

static int efa_request_mgmnt_irq(struct efa_dev *dev)
{
	struct efa_irq *irq;
	int err;

	irq = &dev->admin_irq;
	err = request_irq(irq->vector, irq->handler, 0, irq->name,
			  irq->data);
	if (err) {
		dev_err(&dev->pdev->dev, "Failed to request admin irq (%d)\n",
			err);
		return err;
	}

	dev_dbg(&dev->pdev->dev, "Set affinity hint of mgmnt irq to %*pbl (irq vector: %d)\n",
		nr_cpumask_bits, &irq->affinity_hint_mask, irq->vector);
	irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);

	return err;
}

static void efa_setup_mgmnt_irq(struct efa_dev *dev)
{
	u32 cpu;

	snprintf(dev->admin_irq.name, EFA_IRQNAME_SIZE,
		 "efa-mgmnt@pci:%s", pci_name(dev->pdev));
	dev->admin_irq.handler = efa_intr_msix_mgmnt;
	dev->admin_irq.data = dev;
	dev->admin_irq.vector =
		pci_irq_vector(dev->pdev, dev->admin_msix_vector_idx);
	cpu = cpumask_first(cpu_online_mask);
	dev->admin_irq.cpu = cpu;
	cpumask_set_cpu(cpu,
			&dev->admin_irq.affinity_hint_mask);
	dev_info(&dev->pdev->dev, "Setup irq:0x%p vector:%d name:%s\n",
		 &dev->admin_irq,
		 dev->admin_irq.vector,
		 dev->admin_irq.name);
}

static void efa_free_mgmnt_irq(struct efa_dev *dev)
{
	struct efa_irq *irq;

	irq = &dev->admin_irq;
	irq_set_affinity_hint(irq->vector, NULL);
	free_irq(irq->vector, irq->data);
}

static int efa_set_mgmnt_irq(struct efa_dev *dev)
{
	efa_setup_mgmnt_irq(dev);

	return efa_request_mgmnt_irq(dev);
}

static int efa_request_doorbell_bar(struct efa_dev *dev)
{
	u8 db_bar_idx = dev->dev_attr.db_bar;
	struct pci_dev *pdev = dev->pdev;
	int bars;
	int err;

	if (!(BIT(db_bar_idx) & EFA_BASE_BAR_MASK)) {
		bars = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(db_bar_idx);

		err = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
		if (err) {
			dev_err(&dev->pdev->dev,
				"pci_request_selected_regions for bar %d failed %d\n",
				db_bar_idx, err);
			return err;
		}
	}

	dev->db_bar_addr = pci_resource_start(dev->pdev, db_bar_idx);
	dev->db_bar_len = pci_resource_len(dev->pdev, db_bar_idx);

	return 0;
}

static void efa_release_doorbell_bar(struct efa_dev *dev)
{
	if (!(BIT(dev->dev_attr.db_bar) & EFA_BASE_BAR_MASK))
		efa_release_bars(dev, BIT(dev->dev_attr.db_bar));
}

static void efa_update_hw_hints(struct efa_dev *dev,
				struct efa_com_get_hw_hints_result *hw_hints)
{
	struct efa_com_dev *edev = &dev->edev;

	if (hw_hints->mmio_read_timeout)
		edev->mmio_read.mmio_read_timeout =
			hw_hints->mmio_read_timeout * 1000;

	if (hw_hints->poll_interval)
		edev->aq.poll_interval = hw_hints->poll_interval;

	if (hw_hints->admin_completion_timeout)
		edev->aq.completion_timeout =
			hw_hints->admin_completion_timeout;
}

static void efa_stats_init(struct efa_dev *dev)
{
	atomic64_t *s = (atomic64_t *)&dev->stats;
	int i;

	for (i = 0; i < sizeof(dev->stats) / sizeof(*s); i++, s++)
		atomic64_set(s, 0);
}

static const struct ib_device_ops efa_dev_ops = {
	.owner = THIS_MODULE,
	.driver_id = RDMA_DRIVER_EFA,
	.uverbs_abi_ver = EFA_UVERBS_ABI_VERSION,

	.alloc_pd = efa_alloc_pd,
	.alloc_ucontext = efa_alloc_ucontext,
	.create_ah = efa_create_ah,
	.create_cq = efa_create_cq,
	.create_qp = efa_create_qp,
	.dealloc_pd = efa_dealloc_pd,
	.dealloc_ucontext = efa_dealloc_ucontext,
	.dereg_mr = efa_dereg_mr,
	.destroy_ah = efa_destroy_ah,
	.destroy_cq = efa_destroy_cq,
	.destroy_qp = efa_destroy_qp,
	.get_link_layer = efa_port_link_layer,
	.get_port_immutable = efa_get_port_immutable,
	.mmap = efa_mmap,
	.modify_qp = efa_modify_qp,
	.query_device = efa_query_device,
	.query_gid = efa_query_gid,
	.query_pkey = efa_query_pkey,
	.query_port = efa_query_port,
	.query_qp = efa_query_qp,
	.reg_user_mr = efa_reg_mr,

	INIT_RDMA_OBJ_SIZE(ib_ah, efa_ah, ibah),
	INIT_RDMA_OBJ_SIZE(ib_pd, efa_pd, ibpd),
	INIT_RDMA_OBJ_SIZE(ib_ucontext, efa_ucontext, ibucontext),
};

static int efa_ib_device_add(struct efa_dev *dev)
{
	struct efa_com_get_network_attr_result network_attr;
	struct efa_com_get_hw_hints_result hw_hints;
	struct pci_dev *pdev = dev->pdev;
	int err;

	efa_stats_init(dev);

	err = efa_com_get_device_attr(&dev->edev, &dev->dev_attr);
	if (err)
		return err;

	dev_dbg(&dev->pdev->dev, "Doorbells bar (%d)\n", dev->dev_attr.db_bar);
	err = efa_request_doorbell_bar(dev);
	if (err)
		return err;

	err = efa_com_get_network_attr(&dev->edev, &network_attr);
	if (err)
		goto err_release_doorbell_bar;

	efa_update_network_attr(dev, &network_attr);

	err = efa_com_get_hw_hints(&dev->edev, &hw_hints);
	if (err)
		goto err_release_doorbell_bar;

	efa_update_hw_hints(dev, &hw_hints);

	/* Try to enable all the available aenq groups */
	err = efa_com_set_aenq_config(&dev->edev, EFA_AENQ_ENABLED_GROUPS);
	if (err)
		goto err_release_doorbell_bar;

	dev->ibdev.node_type = RDMA_NODE_UNSPECIFIED;
	dev->ibdev.phys_port_cnt = 1;
	dev->ibdev.num_comp_vectors = 1;
	dev->ibdev.dev.parent = &pdev->dev;

	dev->ibdev.uverbs_cmd_mask =
		(1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
		(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
		(1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
		(1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
		(1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
		(1ull << IB_USER_VERBS_CMD_REG_MR) |
		(1ull << IB_USER_VERBS_CMD_DEREG_MR) |
		(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
		(1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
		(1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
		(1ull << IB_USER_VERBS_CMD_CREATE_QP) |
		(1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
		(1ull << IB_USER_VERBS_CMD_QUERY_QP) |
		(1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
		(1ull << IB_USER_VERBS_CMD_CREATE_AH) |
		(1ull << IB_USER_VERBS_CMD_DESTROY_AH);

	dev->ibdev.uverbs_ex_cmd_mask =
		(1ull << IB_USER_VERBS_EX_CMD_QUERY_DEVICE);

	ib_set_device_ops(&dev->ibdev, &efa_dev_ops);

	err = ib_register_device(&dev->ibdev, "efa_%d");
	if (err)
		goto err_release_doorbell_bar;

	ibdev_info(&dev->ibdev, "IB device registered\n");

	return 0;

err_release_doorbell_bar:
	efa_release_doorbell_bar(dev);
	return err;
}

static void efa_ib_device_remove(struct efa_dev *dev)
{
	efa_com_dev_reset(&dev->edev, EFA_REGS_RESET_NORMAL);
	ibdev_info(&dev->ibdev, "Unregister ib device\n");
	ib_unregister_device(&dev->ibdev);
	efa_release_doorbell_bar(dev);
}

static void efa_disable_msix(struct efa_dev *dev)
{
	pci_free_irq_vectors(dev->pdev);
}

static int efa_enable_msix(struct efa_dev *dev)
{
	int msix_vecs, irq_num;

	/* Reserve the max msix vectors we might need */
	msix_vecs = EFA_NUM_MSIX_VEC;
	dev_dbg(&dev->pdev->dev, "Trying to enable MSI-X, vectors %d\n",
		msix_vecs);

	dev->admin_msix_vector_idx = EFA_MGMNT_MSIX_VEC_IDX;
	irq_num = pci_alloc_irq_vectors(dev->pdev, msix_vecs,
					msix_vecs, PCI_IRQ_MSIX);

	if (irq_num < 0) {
		dev_err(&dev->pdev->dev, "Failed to enable MSI-X. irq_num %d\n",
			irq_num);
		return -ENOSPC;
	}

	if (irq_num != msix_vecs) {
		dev_err(&dev->pdev->dev,
			"Allocated %d MSI-X (out of %d requested)\n",
			irq_num, msix_vecs);
		return -ENOSPC;
	}

	return 0;
}

static int efa_device_init(struct efa_com_dev *edev, struct pci_dev *pdev)
{
	int dma_width;
	int err;

	err = efa_com_dev_reset(edev, EFA_REGS_RESET_NORMAL);
	if (err)
		return err;

	err = efa_com_validate_version(edev);
	if (err)
		return err;

	dma_width = efa_com_get_dma_width(edev);
	if (dma_width < 0) {
		err = dma_width;
		return err;
	}

	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(dma_width));
	if (err) {
		dev_err(&pdev->dev, "pci_set_dma_mask failed %d\n", err);
		return err;
	}

	err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(dma_width));
	if (err) {
		dev_err(&pdev->dev,
			"err_pci_set_consistent_dma_mask failed %d\n",
			err);
		return err;
	}

	return 0;
}

static struct efa_dev *efa_probe_device(struct pci_dev *pdev)
{
	struct efa_com_dev *edev;
	struct efa_dev *dev;
	int bars;
	int err;

	err = pci_enable_device_mem(pdev);
	if (err) {
		dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
		return ERR_PTR(err);
	}

	pci_set_master(pdev);

	dev = ib_alloc_device(efa_dev, ibdev);
	if (!dev) {
		dev_err(&pdev->dev, "Device alloc failed\n");
		err = -ENOMEM;
		goto err_disable_device;
	}

	pci_set_drvdata(pdev, dev);
	edev = &dev->edev;
	edev->efa_dev = dev;
	edev->dmadev = &pdev->dev;
	dev->pdev = pdev;

	bars = pci_select_bars(pdev, IORESOURCE_MEM) & EFA_BASE_BAR_MASK;
	err = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
	if (err) {
		dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
			err);
		goto err_ibdev_destroy;
	}

	dev->reg_bar_addr = pci_resource_start(pdev, EFA_REG_BAR);
	dev->reg_bar_len = pci_resource_len(pdev, EFA_REG_BAR);
	dev->mem_bar_addr = pci_resource_start(pdev, EFA_MEM_BAR);
	dev->mem_bar_len = pci_resource_len(pdev, EFA_MEM_BAR);

	edev->reg_bar = devm_ioremap(&pdev->dev,
				     dev->reg_bar_addr,
				     dev->reg_bar_len);
	if (!edev->reg_bar) {
		dev_err(&pdev->dev, "Failed to remap register bar\n");
		err = -EFAULT;
		goto err_release_bars;
	}

	err = efa_com_mmio_reg_read_init(edev);
	if (err) {
		dev_err(&pdev->dev, "Failed to init readless MMIO\n");
		goto err_iounmap;
	}

	err = efa_device_init(edev, pdev);
	if (err) {
		dev_err(&pdev->dev, "EFA device init failed\n");
		if (err == -ETIME)
			err = -EPROBE_DEFER;
		goto err_reg_read_destroy;
	}

	err = efa_enable_msix(dev);
	if (err)
		goto err_reg_read_destroy;

	edev->aq.msix_vector_idx = dev->admin_msix_vector_idx;
	edev->aenq.msix_vector_idx = dev->admin_msix_vector_idx;

	err = efa_set_mgmnt_irq(dev);
	if (err)
		goto err_disable_msix;

	err = efa_com_admin_init(edev, &aenq_handlers);
	if (err)
		goto err_free_mgmnt_irq;

	return dev;

err_free_mgmnt_irq:
	efa_free_mgmnt_irq(dev);
err_disable_msix:
	efa_disable_msix(dev);
err_reg_read_destroy:
	efa_com_mmio_reg_read_destroy(edev);
err_iounmap:
	devm_iounmap(&pdev->dev, edev->reg_bar);
err_release_bars:
	efa_release_bars(dev, EFA_BASE_BAR_MASK);
err_ibdev_destroy:
	ib_dealloc_device(&dev->ibdev);
err_disable_device:
	pci_disable_device(pdev);
	return ERR_PTR(err);
}

static void efa_remove_device(struct pci_dev *pdev)
{
	struct efa_dev *dev = pci_get_drvdata(pdev);
	struct efa_com_dev *edev;

	edev = &dev->edev;
	efa_com_admin_destroy(edev);
	efa_free_mgmnt_irq(dev);
	efa_disable_msix(dev);
	efa_com_mmio_reg_read_destroy(edev);
	devm_iounmap(&pdev->dev, edev->reg_bar);
	efa_release_bars(dev, EFA_BASE_BAR_MASK);
	ib_dealloc_device(&dev->ibdev);
	pci_disable_device(pdev);
}

static int efa_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct efa_dev *dev;
	int err;

	dev = efa_probe_device(pdev);
	if (IS_ERR(dev))
		return PTR_ERR(dev);

	err = efa_ib_device_add(dev);
	if (err)
		goto err_remove_device;

	return 0;

err_remove_device:
	efa_remove_device(pdev);
	return err;
}

static void efa_remove(struct pci_dev *pdev)
{
	struct efa_dev *dev = pci_get_drvdata(pdev);

	efa_ib_device_remove(dev);
	efa_remove_device(pdev);
}

static struct pci_driver efa_pci_driver = {
	.name           = DRV_MODULE_NAME,
	.id_table       = efa_pci_tbl,
	.probe          = efa_probe,
	.remove         = efa_remove,
};

module_pci_driver(efa_pci_driver);