summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/emulex/benet/be_roce.c
blob: 2b62841c4c63bbd3e630f465d02b9806eb0be9c3 (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
/*
 * Copyright (C) 2005 - 2016 Broadcom
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation. The full GNU General
 * Public License is included in this distribution in the file called COPYING.
 *
 * Contact Information:
 * linux-drivers@emulex.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 */

#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/module.h>

#include "be.h"
#include "be_cmds.h"

static struct ocrdma_driver *ocrdma_drv;
static LIST_HEAD(be_adapter_list);
static DEFINE_MUTEX(be_adapter_list_lock);

static void _be_roce_dev_add(struct be_adapter *adapter)
{
	struct be_dev_info dev_info;
	int i, num_vec;
	struct pci_dev *pdev = adapter->pdev;

	if (!ocrdma_drv)
		return;

	if (ocrdma_drv->be_abi_version != BE_ROCE_ABI_VERSION) {
		dev_warn(&pdev->dev, "Cannot initialize RoCE due to ocrdma ABI mismatch\n");
		return;
	}

	if (pdev->device == OC_DEVICE_ID5) {
		/* only msix is supported on these devices */
		if (!msix_enabled(adapter))
			return;
		/* DPP region address and length */
		dev_info.dpp_unmapped_addr = pci_resource_start(pdev, 2);
		dev_info.dpp_unmapped_len = pci_resource_len(pdev, 2);
	} else {
		dev_info.dpp_unmapped_addr = 0;
		dev_info.dpp_unmapped_len = 0;
	}
	dev_info.pdev = adapter->pdev;
	dev_info.db = adapter->db;
	dev_info.unmapped_db = adapter->roce_db.io_addr;
	dev_info.db_page_size = adapter->roce_db.size;
	dev_info.db_total_size = adapter->roce_db.total_size;
	dev_info.netdev = adapter->netdev;
	memcpy(dev_info.mac_addr, adapter->netdev->dev_addr, ETH_ALEN);
	dev_info.dev_family = adapter->sli_family;
	if (msix_enabled(adapter)) {
		/* provide all the vectors, so that EQ creation response
		 * can decide which one to use.
		 */
		num_vec = adapter->num_msix_vec + adapter->num_msix_roce_vec;
		dev_info.intr_mode = BE_INTERRUPT_MODE_MSIX;
		dev_info.msix.num_vectors = min(num_vec, MAX_MSIX_VECTORS);
		/* provide start index of the vector,
		 * so in case of linear usage,
		 * it can use the base as starting point.
		 */
		dev_info.msix.start_vector = adapter->num_evt_qs;
		for (i = 0; i < dev_info.msix.num_vectors; i++) {
			dev_info.msix.vector_list[i] =
			    adapter->msix_entries[i].vector;
		}
	} else {
		dev_info.msix.num_vectors = 0;
		dev_info.intr_mode = BE_INTERRUPT_MODE_INTX;
	}
	adapter->ocrdma_dev = ocrdma_drv->add(&dev_info);
}

void be_roce_dev_add(struct be_adapter *adapter)
{
	if (be_roce_supported(adapter)) {
		INIT_LIST_HEAD(&adapter->entry);
		mutex_lock(&be_adapter_list_lock);
		list_add_tail(&adapter->entry, &be_adapter_list);

		/* invoke add() routine of roce driver only if
		 * valid driver registered with add method and add() is not yet
		 * invoked on a given adapter.
		 */
		_be_roce_dev_add(adapter);
		mutex_unlock(&be_adapter_list_lock);
	}
}

static void _be_roce_dev_remove(struct be_adapter *adapter)
{
	if (ocrdma_drv && ocrdma_drv->remove && adapter->ocrdma_dev)
		ocrdma_drv->remove(adapter->ocrdma_dev);
	adapter->ocrdma_dev = NULL;
}

void be_roce_dev_remove(struct be_adapter *adapter)
{
	if (be_roce_supported(adapter)) {
		mutex_lock(&be_adapter_list_lock);
		_be_roce_dev_remove(adapter);
		list_del(&adapter->entry);
		mutex_unlock(&be_adapter_list_lock);
	}
}

void be_roce_dev_shutdown(struct be_adapter *adapter)
{
	if (be_roce_supported(adapter)) {
		mutex_lock(&be_adapter_list_lock);
		if (ocrdma_drv && adapter->ocrdma_dev &&
		    ocrdma_drv->state_change_handler)
			ocrdma_drv->state_change_handler(adapter->ocrdma_dev,
							 BE_DEV_SHUTDOWN);
		mutex_unlock(&be_adapter_list_lock);
	}
}

int be_roce_register_driver(struct ocrdma_driver *drv)
{
	struct be_adapter *dev;

	mutex_lock(&be_adapter_list_lock);
	if (ocrdma_drv) {
		mutex_unlock(&be_adapter_list_lock);
		return -EINVAL;
	}
	ocrdma_drv = drv;
	list_for_each_entry(dev, &be_adapter_list, entry) {
		struct net_device *netdev;

		_be_roce_dev_add(dev);
		netdev = dev->netdev;
	}
	mutex_unlock(&be_adapter_list_lock);
	return 0;
}
EXPORT_SYMBOL(be_roce_register_driver);

void be_roce_unregister_driver(struct ocrdma_driver *drv)
{
	struct be_adapter *dev;

	mutex_lock(&be_adapter_list_lock);
	list_for_each_entry(dev, &be_adapter_list, entry) {
		if (dev->ocrdma_dev)
			_be_roce_dev_remove(dev);
	}
	ocrdma_drv = NULL;
	mutex_unlock(&be_adapter_list_lock);
}
EXPORT_SYMBOL(be_roce_unregister_driver);