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_device * ib_dev,struct ib_ucontext * context,struct ib_udata * udata)60 struct ib_pd *hns_roce_alloc_pd(struct ib_device *ib_dev,
61 struct ib_ucontext *context,
62 struct ib_udata *udata)
63 {
64 struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
65 struct device *dev = hr_dev->dev;
66 struct hns_roce_pd *pd;
67 int ret;
68
69 pd = kmalloc(sizeof(*pd), GFP_KERNEL);
70 if (!pd)
71 return ERR_PTR(-ENOMEM);
72
73 ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
74 if (ret) {
75 kfree(pd);
76 dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n");
77 return ERR_PTR(ret);
78 }
79
80 if (context) {
81 struct hns_roce_ib_alloc_pd_resp uresp = {.pdn = pd->pdn};
82
83 if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
84 hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
85 dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n");
86 kfree(pd);
87 return ERR_PTR(-EFAULT);
88 }
89 }
90
91 return &pd->ibpd;
92 }
93 EXPORT_SYMBOL_GPL(hns_roce_alloc_pd);
94
hns_roce_dealloc_pd(struct ib_pd * pd)95 int hns_roce_dealloc_pd(struct ib_pd *pd)
96 {
97 hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
98 kfree(to_hr_pd(pd));
99
100 return 0;
101 }
102 EXPORT_SYMBOL_GPL(hns_roce_dealloc_pd);
103
hns_roce_uar_alloc(struct hns_roce_dev * hr_dev,struct hns_roce_uar * uar)104 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
105 {
106 struct resource *res;
107 int ret = 0;
108
109 /* Using bitmap to manager UAR index */
110 ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);
111 if (ret == -1)
112 return -ENOMEM;
113
114 if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
115 uar->index = (uar->logic_idx - 1) %
116 (hr_dev->caps.phy_num_uars - 1) + 1;
117 else
118 uar->index = 0;
119
120 if (!dev_is_pci(hr_dev->dev)) {
121 res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
122 if (!res) {
123 dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
124 return -EINVAL;
125 }
126 uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
127 } else {
128 uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
129 >> PAGE_SHIFT);
130 }
131
132 return 0;
133 }
134
hns_roce_uar_free(struct hns_roce_dev * hr_dev,struct hns_roce_uar * uar)135 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
136 {
137 hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx,
138 BITMAP_NO_RR);
139 }
140
hns_roce_init_uar_table(struct hns_roce_dev * hr_dev)141 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
142 {
143 return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
144 hr_dev->caps.num_uars,
145 hr_dev->caps.num_uars - 1,
146 hr_dev->caps.reserved_uars, 0);
147 }
148
hns_roce_cleanup_uar_table(struct hns_roce_dev * hr_dev)149 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
150 {
151 hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
152 }
153
