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 "hns_roce_device.h"
36
hns_roce_init_pd_table(struct hns_roce_dev * hr_dev)37 void hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
38 {
39 struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
40
41 ida_init(&pd_ida->ida);
42 pd_ida->max = hr_dev->caps.num_pds - 1;
43 pd_ida->min = hr_dev->caps.reserved_pds;
44 }
45
hns_roce_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)46 int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
47 {
48 struct ib_device *ib_dev = ibpd->device;
49 struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
50 struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
51 struct hns_roce_pd *pd = to_hr_pd(ibpd);
52 int ret = 0;
53 int id;
54
55 id = ida_alloc_range(&pd_ida->ida, pd_ida->min, pd_ida->max,
56 GFP_KERNEL);
57 if (id < 0) {
58 ibdev_err(ib_dev, "failed to alloc pd, id = %d.\n", id);
59 return -ENOMEM;
60 }
61 pd->pdn = (unsigned long)id;
62
63 if (udata) {
64 struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
65
66 ret = ib_copy_to_udata(udata, &resp,
67 min(udata->outlen, sizeof(resp)));
68 if (ret) {
69 ida_free(&pd_ida->ida, id);
70 ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
71 }
72 }
73
74 return ret;
75 }
76
hns_roce_dealloc_pd(struct ib_pd * pd,struct ib_udata * udata)77 int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
78 {
79 struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
80
81 ida_free(&hr_dev->pd_ida.ida, (int)to_hr_pd(pd)->pdn);
82
83 return 0;
84 }
85
hns_roce_uar_alloc(struct hns_roce_dev * hr_dev,struct hns_roce_uar * uar)86 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
87 {
88 struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
89 struct resource *res;
90 int id;
91
92 /* Using bitmap to manager UAR index */
93 id = ida_alloc_range(&uar_ida->ida, uar_ida->min, uar_ida->max,
94 GFP_KERNEL);
95 if (id < 0) {
96 ibdev_err(&hr_dev->ib_dev, "failed to alloc uar id(%d).\n", id);
97 return -ENOMEM;
98 }
99 uar->logic_idx = (unsigned long)id;
100
101 if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
102 uar->index = (uar->logic_idx - 1) %
103 (hr_dev->caps.phy_num_uars - 1) + 1;
104 else
105 uar->index = 0;
106
107 if (!dev_is_pci(hr_dev->dev)) {
108 res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
109 if (!res) {
110 ida_free(&uar_ida->ida, id);
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
hns_roce_init_uar_table(struct hns_roce_dev * hr_dev)123 void hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
124 {
125 struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
126
127 ida_init(&uar_ida->ida);
128 uar_ida->max = hr_dev->caps.num_uars - 1;
129 uar_ida->min = hr_dev->caps.reserved_uars;
130 }
131
hns_roce_xrcd_alloc(struct hns_roce_dev * hr_dev,u32 * xrcdn)132 static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn)
133 {
134 struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
135 int id;
136
137 id = ida_alloc_range(&xrcd_ida->ida, xrcd_ida->min, xrcd_ida->max,
138 GFP_KERNEL);
139 if (id < 0) {
140 ibdev_err(&hr_dev->ib_dev, "failed to alloc xrcdn(%d).\n", id);
141 return -ENOMEM;
142 }
143 *xrcdn = (u32)id;
144
145 return 0;
146 }
147
hns_roce_init_xrcd_table(struct hns_roce_dev * hr_dev)148 void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)
149 {
150 struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
151
152 ida_init(&xrcd_ida->ida);
153 xrcd_ida->max = hr_dev->caps.num_xrcds - 1;
154 xrcd_ida->min = hr_dev->caps.reserved_xrcds;
155 }
156
hns_roce_alloc_xrcd(struct ib_xrcd * ib_xrcd,struct ib_udata * udata)157 int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
158 {
159 struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
160 struct hns_roce_xrcd *xrcd = to_hr_xrcd(ib_xrcd);
161 int ret;
162
163 if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC))
164 return -EINVAL;
165
166 ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn);
167 if (ret)
168 return ret;
169
170 return 0;
171 }
172
hns_roce_dealloc_xrcd(struct ib_xrcd * ib_xrcd,struct ib_udata * udata)173 int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
174 {
175 struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
176 u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn;
177
178 ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn);
179
180 return 0;
181 }
182