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 <uapi/rdma/hns-abi.h>
36 #include "hns_roce_device.h"
37
hns_roce_pd_alloc(struct hns_roce_dev * hr_dev,unsigned long * pdn)38 static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn)
39 {
40 return hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, pdn) ? -ENOMEM : 0;
41 }
42
hns_roce_pd_free(struct hns_roce_dev * hr_dev,unsigned long pdn)43 static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn)
44 {
45 hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn, BITMAP_NO_RR);
46 }
47
hns_roce_init_pd_table(struct hns_roce_dev * hr_dev)48 int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
49 {
50 return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds,
51 hr_dev->caps.num_pds - 1,
52 hr_dev->caps.reserved_pds, 0);
53 }
54
hns_roce_cleanup_pd_table(struct hns_roce_dev * hr_dev)55 void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev)
56 {
57 hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap);
58 }
59
hns_roce_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)60 int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
61 {
62 struct ib_device *ib_dev = ibpd->device;
63 struct hns_roce_pd *pd = to_hr_pd(ibpd);
64 int ret;
65
66 ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
67 if (ret) {
68 ibdev_err(ib_dev, "failed to alloc pd, ret = %d.\n", ret);
69 return ret;
70 }
71
72 if (udata) {
73 struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
74
75 ret = ib_copy_to_udata(udata, &resp,
76 min(udata->outlen, sizeof(resp)));
77 if (ret) {
78 hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
79 ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
80 }
81 }
82
83 return ret;
84 }
85
hns_roce_dealloc_pd(struct ib_pd * pd,struct ib_udata * udata)86 int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
87 {
88 hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
89 return 0;
90 }
91
hns_roce_uar_alloc(struct hns_roce_dev * hr_dev,struct hns_roce_uar * uar)92 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
93 {
94 struct resource *res;
95 int ret;
96
97 /* Using bitmap to manager UAR index */
98 ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);
99 if (ret)
100 return -ENOMEM;
101
102 if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
103 uar->index = (uar->logic_idx - 1) %
104 (hr_dev->caps.phy_num_uars - 1) + 1;
105 else
106 uar->index = 0;
107
108 if (!dev_is_pci(hr_dev->dev)) {
109 res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
110 if (!res) {
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_uar_free(struct hns_roce_dev * hr_dev,struct hns_roce_uar * uar)123 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
124 {
125 hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx,
126 BITMAP_NO_RR);
127 }
128
hns_roce_init_uar_table(struct hns_roce_dev * hr_dev)129 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
130 {
131 return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
132 hr_dev->caps.num_uars,
133 hr_dev->caps.num_uars - 1,
134 hr_dev->caps.reserved_uars, 0);
135 }
136
hns_roce_cleanup_uar_table(struct hns_roce_dev * hr_dev)137 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
138 {
139 hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
140 }
141