summaryrefslogtreecommitdiff
path: root/drivers/infiniband/hw/hns/hns_roce_pd.c
blob: 16271b5bd1701deceaab511e9ad7d8813d555a6d (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
/*
 * Copyright (c) 2016 Hisilicon Limited.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/platform_device.h>
#include "hns_roce_device.h"

static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn)
{
	struct device *dev = &hr_dev->pdev->dev;
	unsigned long pd_number;
	int ret = 0;

	ret = hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, &pd_number);
	if (ret == -1) {
		dev_err(dev, "alloc pdn from pdbitmap failed\n");
		return -ENOMEM;
	}

	*pdn = pd_number;

	return 0;
}

static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn)
{
	hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn);
}

int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
{
	return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds,
				    hr_dev->caps.num_pds - 1,
				    hr_dev->caps.reserved_pds, 0);
}

void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev)
{
	hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap);
}

struct ib_pd *hns_roce_alloc_pd(struct ib_device *ib_dev,
				struct ib_ucontext *context,
				struct ib_udata *udata)
{
	struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
	struct device *dev = &hr_dev->pdev->dev;
	struct hns_roce_pd *pd;
	int ret;

	pd = kmalloc(sizeof(*pd), GFP_KERNEL);
	if (!pd)
		return ERR_PTR(-ENOMEM);

	ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
	if (ret) {
		kfree(pd);
		dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n");
		return ERR_PTR(ret);
	}

	if (context) {
		if (ib_copy_to_udata(udata, &pd->pdn, sizeof(u64))) {
			hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
			dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n");
			kfree(pd);
			return ERR_PTR(-EFAULT);
		}
	}

	return &pd->ibpd;
}

int hns_roce_dealloc_pd(struct ib_pd *pd)
{
	hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
	kfree(to_hr_pd(pd));

	return 0;
}

int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
{
	struct resource *res;
	int ret = 0;

	/* Using bitmap to manager UAR index */
	ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->index);
	if (ret == -1)
		return -ENOMEM;

	uar->index = (uar->index - 1) % hr_dev->caps.phy_num_uars + 1;

	res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
	uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;

	return 0;
}

void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
{
	hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->index);
}

int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
{
	return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
				    hr_dev->caps.num_uars,
				    hr_dev->caps.num_uars - 1,
				    hr_dev->caps.reserved_uars, 0);
}

void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
{
	hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
}