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/pci.h>
34#include "hns_roce_device.h"
35
36void hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
37{
38	struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
39
40	ida_init(&pd_ida->ida);
41	pd_ida->max = hr_dev->caps.num_pds - 1;
42	pd_ida->min = hr_dev->caps.reserved_pds;
43}
44
45int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
46{
47	struct ib_device *ib_dev = ibpd->device;
48	struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
49	struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
50	struct hns_roce_pd *pd = to_hr_pd(ibpd);
51	int ret = 0;
52	int id;
53
54	id = ida_alloc_range(&pd_ida->ida, pd_ida->min, pd_ida->max,
55			     GFP_KERNEL);
56	if (id < 0) {
57		ibdev_err(ib_dev, "failed to alloc pd, id = %d.\n", id);
58		return -ENOMEM;
59	}
60	pd->pdn = (unsigned long)id;
61
62	if (udata) {
63		struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
64
65		ret = ib_copy_to_udata(udata, &resp,
66				       min(udata->outlen, sizeof(resp)));
67		if (ret) {
68			ida_free(&pd_ida->ida, id);
69			ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
70		}
71	}
72
73	return ret;
74}
75
76int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
77{
78	struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
79
80	ida_free(&hr_dev->pd_ida.ida, (int)to_hr_pd(pd)->pdn);
81
82	return 0;
83}
84
85int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
86{
87	struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
88	int id;
89
90	/* Using bitmap to manager UAR index */
91	id = ida_alloc_range(&uar_ida->ida, uar_ida->min, uar_ida->max,
92			     GFP_KERNEL);
93	if (id < 0) {
94		ibdev_err(&hr_dev->ib_dev, "failed to alloc uar id(%d).\n", id);
95		return -ENOMEM;
96	}
97	uar->logic_idx = (unsigned long)id;
98
99	if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
100		uar->index = (uar->logic_idx - 1) %
101			     (hr_dev->caps.phy_num_uars - 1) + 1;
102	else
103		uar->index = 0;
104
105	uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2)) >> PAGE_SHIFT);
106	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_DIRECT_WQE)
107		hr_dev->dwqe_page = pci_resource_start(hr_dev->pci_dev, 4);
108
109	return 0;
110}
111
112void hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
113{
114	struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
115
116	ida_init(&uar_ida->ida);
117	uar_ida->max = hr_dev->caps.num_uars - 1;
118	uar_ida->min = hr_dev->caps.reserved_uars;
119}
120
121static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn)
122{
123	struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
124	int id;
125
126	id = ida_alloc_range(&xrcd_ida->ida, xrcd_ida->min, xrcd_ida->max,
127			     GFP_KERNEL);
128	if (id < 0) {
129		ibdev_err(&hr_dev->ib_dev, "failed to alloc xrcdn(%d).\n", id);
130		return -ENOMEM;
131	}
132	*xrcdn = (u32)id;
133
134	return 0;
135}
136
137void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)
138{
139	struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
140
141	ida_init(&xrcd_ida->ida);
142	xrcd_ida->max = hr_dev->caps.num_xrcds - 1;
143	xrcd_ida->min = hr_dev->caps.reserved_xrcds;
144}
145
146int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
147{
148	struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
149	struct hns_roce_xrcd *xrcd = to_hr_xrcd(ib_xrcd);
150	int ret;
151
152	if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC))
153		return -EOPNOTSUPP;
154
155	ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn);
156	if (ret)
157		return ret;
158
159	return 0;
160}
161
162int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
163{
164	struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
165	u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn;
166
167	ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn);
168
169	return 0;
170}
171