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
hns_roce_init_pd_table(struct hns_roce_dev * hr_dev)36 void 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
hns_roce_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)45 int 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
hns_roce_dealloc_pd(struct ib_pd * pd,struct ib_udata * udata)76 int 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
hns_roce_uar_alloc(struct hns_roce_dev * hr_dev,struct hns_roce_uar * uar)85 int 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
hns_roce_init_uar_table(struct hns_roce_dev * hr_dev)112 void 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
hns_roce_xrcd_alloc(struct hns_roce_dev * hr_dev,u32 * xrcdn)121 static 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
hns_roce_init_xrcd_table(struct hns_roce_dev * hr_dev)137 void 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
hns_roce_alloc_xrcd(struct ib_xrcd * ib_xrcd,struct ib_udata * udata)146 int 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
hns_roce_dealloc_xrcd(struct ib_xrcd * ib_xrcd,struct ib_udata * udata)162 int 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