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 "hns_roce_device.h"
34
hns_roce_init_pd_table(struct hns_roce_dev * hr_dev)35 void hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
36 {
37 struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
38
39 ida_init(&pd_ida->ida);
40 pd_ida->max = hr_dev->caps.num_pds - 1;
41 pd_ida->min = hr_dev->caps.reserved_pds;
42 }
43
hns_roce_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)44 int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
45 {
46 struct ib_device *ib_dev = ibpd->device;
47 struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
48 struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
49 struct hns_roce_pd *pd = to_hr_pd(ibpd);
50 int ret = 0;
51 int id;
52
53 id = ida_alloc_range(&pd_ida->ida, pd_ida->min, pd_ida->max,
54 GFP_KERNEL);
55 if (id < 0) {
56 ibdev_err(ib_dev, "failed to alloc pd, id = %d.\n", id);
57 return -ENOMEM;
58 }
59 pd->pdn = (unsigned long)id;
60
61 if (udata) {
62 struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
63
64 ret = ib_copy_to_udata(udata, &resp,
65 min(udata->outlen, sizeof(resp)));
66 if (ret) {
67 ida_free(&pd_ida->ida, id);
68 ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
69 }
70 }
71
72 return ret;
73 }
74
hns_roce_dealloc_pd(struct ib_pd * pd,struct ib_udata * udata)75 int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
76 {
77 struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
78
79 ida_free(&hr_dev->pd_ida.ida, (int)to_hr_pd(pd)->pdn);
80
81 return 0;
82 }
83
hns_roce_uar_alloc(struct hns_roce_dev * hr_dev,struct hns_roce_uar * uar)84 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
85 {
86 struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
87 int id;
88
89 /* Using bitmap to manager UAR index */
90 id = ida_alloc_range(&uar_ida->ida, uar_ida->min, uar_ida->max,
91 GFP_KERNEL);
92 if (id < 0) {
93 ibdev_err(&hr_dev->ib_dev, "failed to alloc uar id(%d).\n", id);
94 return -ENOMEM;
95 }
96 uar->logic_idx = (unsigned long)id;
97
98 if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
99 uar->index = (uar->logic_idx - 1) %
100 (hr_dev->caps.phy_num_uars - 1) + 1;
101 else
102 uar->index = 0;
103
104 uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2)) >> PAGE_SHIFT);
105 if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_DIRECT_WQE)
106 hr_dev->dwqe_page = pci_resource_start(hr_dev->pci_dev, 4);
107
108 return 0;
109 }
110
hns_roce_init_uar_table(struct hns_roce_dev * hr_dev)111 void hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
112 {
113 struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
114
115 ida_init(&uar_ida->ida);
116 uar_ida->max = hr_dev->caps.num_uars - 1;
117 uar_ida->min = hr_dev->caps.reserved_uars;
118 }
119
hns_roce_xrcd_alloc(struct hns_roce_dev * hr_dev,u32 * xrcdn)120 static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn)
121 {
122 struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
123 int id;
124
125 id = ida_alloc_range(&xrcd_ida->ida, xrcd_ida->min, xrcd_ida->max,
126 GFP_KERNEL);
127 if (id < 0) {
128 ibdev_err(&hr_dev->ib_dev, "failed to alloc xrcdn(%d).\n", id);
129 return -ENOMEM;
130 }
131 *xrcdn = (u32)id;
132
133 return 0;
134 }
135
hns_roce_init_xrcd_table(struct hns_roce_dev * hr_dev)136 void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)
137 {
138 struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
139
140 ida_init(&xrcd_ida->ida);
141 xrcd_ida->max = hr_dev->caps.num_xrcds - 1;
142 xrcd_ida->min = hr_dev->caps.reserved_xrcds;
143 }
144
hns_roce_alloc_xrcd(struct ib_xrcd * ib_xrcd,struct ib_udata * udata)145 int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
146 {
147 struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
148 struct hns_roce_xrcd *xrcd = to_hr_xrcd(ib_xrcd);
149 int ret;
150
151 if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC)) {
152 ret = -EOPNOTSUPP;
153 goto err_out;
154 }
155
156 ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn);
157
158 err_out:
159 if (ret)
160 atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_XRCD_ALLOC_ERR_CNT]);
161
162 return ret;
163 }
164
hns_roce_dealloc_xrcd(struct ib_xrcd * ib_xrcd,struct ib_udata * udata)165 int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
166 {
167 struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
168 u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn;
169
170 ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn);
171
172 return 0;
173 }
174