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_pd_alloc(struct hns_roce_dev * hr_dev,unsigned long * pdn)37 static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn)
38 {
39 return hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, pdn) ? -ENOMEM : 0;
40 }
41
hns_roce_pd_free(struct hns_roce_dev * hr_dev,unsigned long pdn)42 static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn)
43 {
44 hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn, BITMAP_NO_RR);
45 }
46
hns_roce_init_pd_table(struct hns_roce_dev * hr_dev)47 int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
48 {
49 return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds,
50 hr_dev->caps.num_pds - 1,
51 hr_dev->caps.reserved_pds, 0);
52 }
53
hns_roce_cleanup_pd_table(struct hns_roce_dev * hr_dev)54 void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev)
55 {
56 hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap);
57 }
58
hns_roce_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)59 int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
60 {
61 struct ib_device *ib_dev = ibpd->device;
62 struct hns_roce_pd *pd = to_hr_pd(ibpd);
63 int ret;
64
65 ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
66 if (ret) {
67 ibdev_err(ib_dev, "failed to alloc pd, ret = %d.\n", ret);
68 return ret;
69 }
70
71 if (udata) {
72 struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
73
74 ret = ib_copy_to_udata(udata, &resp,
75 min(udata->outlen, sizeof(resp)));
76 if (ret) {
77 hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
78 ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
79 }
80 }
81
82 return ret;
83 }
84
hns_roce_dealloc_pd(struct ib_pd * pd,struct ib_udata * udata)85 int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
86 {
87 hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
88 return 0;
89 }
90
hns_roce_uar_alloc(struct hns_roce_dev * hr_dev,struct hns_roce_uar * uar)91 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
92 {
93 struct resource *res;
94 int ret;
95
96 /* Using bitmap to manager UAR index */
97 ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);
98 if (ret)
99 return -ENOMEM;
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 dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
111 return -EINVAL;
112 }
113 uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
114 } else {
115 uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
116 >> PAGE_SHIFT);
117 }
118
119 return 0;
120 }
121
hns_roce_uar_free(struct hns_roce_dev * hr_dev,struct hns_roce_uar * uar)122 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
123 {
124 hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx,
125 BITMAP_NO_RR);
126 }
127
hns_roce_init_uar_table(struct hns_roce_dev * hr_dev)128 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
129 {
130 return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
131 hr_dev->caps.num_uars,
132 hr_dev->caps.num_uars - 1,
133 hr_dev->caps.reserved_uars, 0);
134 }
135
hns_roce_cleanup_uar_table(struct hns_roce_dev * hr_dev)136 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
137 {
138 hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
139 }
140
hns_roce_xrcd_alloc(struct hns_roce_dev * hr_dev,u32 * xrcdn)141 static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn)
142 {
143 unsigned long obj;
144 int ret;
145
146 ret = hns_roce_bitmap_alloc(&hr_dev->xrcd_bitmap, &obj);
147 if (ret)
148 return ret;
149
150 *xrcdn = obj;
151
152 return 0;
153 }
154
hns_roce_xrcd_free(struct hns_roce_dev * hr_dev,u32 xrcdn)155 static void hns_roce_xrcd_free(struct hns_roce_dev *hr_dev,
156 u32 xrcdn)
157 {
158 hns_roce_bitmap_free(&hr_dev->xrcd_bitmap, xrcdn, BITMAP_NO_RR);
159 }
160
hns_roce_init_xrcd_table(struct hns_roce_dev * hr_dev)161 int hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)
162 {
163 return hns_roce_bitmap_init(&hr_dev->xrcd_bitmap,
164 hr_dev->caps.num_xrcds,
165 hr_dev->caps.num_xrcds - 1,
166 hr_dev->caps.reserved_xrcds, 0);
167 }
168
hns_roce_cleanup_xrcd_table(struct hns_roce_dev * hr_dev)169 void hns_roce_cleanup_xrcd_table(struct hns_roce_dev *hr_dev)
170 {
171 hns_roce_bitmap_cleanup(&hr_dev->xrcd_bitmap);
172 }
173
hns_roce_alloc_xrcd(struct ib_xrcd * ib_xrcd,struct ib_udata * udata)174 int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
175 {
176 struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
177 struct hns_roce_xrcd *xrcd = to_hr_xrcd(ib_xrcd);
178 int ret;
179
180 if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC))
181 return -EINVAL;
182
183 ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn);
184 if (ret) {
185 dev_err(hr_dev->dev, "failed to alloc xrcdn, ret = %d.\n", ret);
186 return ret;
187 }
188
189 return 0;
190 }
191
hns_roce_dealloc_xrcd(struct ib_xrcd * ib_xrcd,struct ib_udata * udata)192 int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
193 {
194 hns_roce_xrcd_free(to_hr_dev(ib_xrcd->device),
195 to_hr_xrcd(ib_xrcd)->xrcdn);
196
197 return 0;
198 }
199