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 
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 
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 
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 
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 
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 uresp = {.pdn = pd->pdn};
74 
75 		if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
76 			hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
77 			ibdev_err(ib_dev, "failed to copy to udata\n");
78 			return -EFAULT;
79 		}
80 	}
81 
82 	return 0;
83 }
84 
85 void 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 }
89 
90 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
91 {
92 	struct resource *res;
93 	int ret;
94 
95 	/* Using bitmap to manager UAR index */
96 	ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);
97 	if (ret)
98 		return -ENOMEM;
99 
100 	if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
101 		uar->index = (uar->logic_idx - 1) %
102 			     (hr_dev->caps.phy_num_uars - 1) + 1;
103 	else
104 		uar->index = 0;
105 
106 	if (!dev_is_pci(hr_dev->dev)) {
107 		res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
108 		if (!res) {
109 			dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
110 			return -EINVAL;
111 		}
112 		uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
113 	} else {
114 		uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
115 			   >> PAGE_SHIFT);
116 	}
117 
118 	return 0;
119 }
120 
121 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
122 {
123 	hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx,
124 			     BITMAP_NO_RR);
125 }
126 
127 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
128 {
129 	return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
130 				    hr_dev->caps.num_uars,
131 				    hr_dev->caps.num_uars - 1,
132 				    hr_dev->caps.reserved_uars, 0);
133 }
134 
135 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
136 {
137 	hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
138 }
139