1/*
2 * Copyright (c) 2016 Hisilicon Limited.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses.  You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 *     Redistribution and use in source and binary forms, with or
11 *     without modification, are permitted provided that the following
12 *     conditions are met:
13 *
14 *      - Redistributions of source code must retain the above
15 *        copyright notice, this list of conditions and the following
16 *        disclaimer.
17 *
18 *      - Redistributions in binary form must reproduce the above
19 *        copyright notice, this list of conditions and the following
20 *        disclaimer in the documentation and/or other materials
21 *        provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#include <linux/platform_device.h>
34#include <linux/pci.h>
35#include <uapi/rdma/hns-abi.h>
36#include "hns_roce_device.h"
37
38static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn)
39{
40	return hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, pdn) ? -ENOMEM : 0;
41}
42
43static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn)
44{
45	hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn, BITMAP_NO_RR);
46}
47
48int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
49{
50	return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds,
51				    hr_dev->caps.num_pds - 1,
52				    hr_dev->caps.reserved_pds, 0);
53}
54
55void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev)
56{
57	hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap);
58}
59
60int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
61{
62	struct ib_device *ib_dev = ibpd->device;
63	struct hns_roce_pd *pd = to_hr_pd(ibpd);
64	int ret;
65
66	ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
67	if (ret) {
68		ibdev_err(ib_dev, "failed to alloc pd, ret = %d.\n", ret);
69		return ret;
70	}
71
72	if (udata) {
73		struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
74
75		ret = ib_copy_to_udata(udata, &resp,
76				       min(udata->outlen, sizeof(resp)));
77		if (ret) {
78			hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
79			ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
80		}
81	}
82
83	return ret;
84}
85
86int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
87{
88	hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
89	return 0;
90}
91
92int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
93{
94	struct resource *res;
95	int ret;
96
97	/* Using bitmap to manager UAR index */
98	ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);
99	if (ret)
100		return -ENOMEM;
101
102	if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
103		uar->index = (uar->logic_idx - 1) %
104			     (hr_dev->caps.phy_num_uars - 1) + 1;
105	else
106		uar->index = 0;
107
108	if (!dev_is_pci(hr_dev->dev)) {
109		res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
110		if (!res) {
111			dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
112			return -EINVAL;
113		}
114		uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
115	} else {
116		uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
117			   >> PAGE_SHIFT);
118	}
119
120	return 0;
121}
122
123void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
124{
125	hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx,
126			     BITMAP_NO_RR);
127}
128
129int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
130{
131	return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
132				    hr_dev->caps.num_uars,
133				    hr_dev->caps.num_uars - 1,
134				    hr_dev->caps.reserved_uars, 0);
135}
136
137void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
138{
139	hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
140}
141