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 
37 void hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
38 {
39 	struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
40 
41 	ida_init(&pd_ida->ida);
42 	pd_ida->max = hr_dev->caps.num_pds - 1;
43 	pd_ida->min = hr_dev->caps.reserved_pds;
44 }
45 
46 int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
47 {
48 	struct ib_device *ib_dev = ibpd->device;
49 	struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
50 	struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
51 	struct hns_roce_pd *pd = to_hr_pd(ibpd);
52 	int ret = 0;
53 	int id;
54 
55 	id = ida_alloc_range(&pd_ida->ida, pd_ida->min, pd_ida->max,
56 			     GFP_KERNEL);
57 	if (id < 0) {
58 		ibdev_err(ib_dev, "failed to alloc pd, id = %d.\n", id);
59 		return -ENOMEM;
60 	}
61 	pd->pdn = (unsigned long)id;
62 
63 	if (udata) {
64 		struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
65 
66 		ret = ib_copy_to_udata(udata, &resp,
67 				       min(udata->outlen, sizeof(resp)));
68 		if (ret) {
69 			ida_free(&pd_ida->ida, id);
70 			ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
71 		}
72 	}
73 
74 	return ret;
75 }
76 
77 int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
78 {
79 	struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
80 
81 	ida_free(&hr_dev->pd_ida.ida, (int)to_hr_pd(pd)->pdn);
82 
83 	return 0;
84 }
85 
86 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
87 {
88 	struct resource *res;
89 	int ret;
90 
91 	/* Using bitmap to manager UAR index */
92 	ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);
93 	if (ret)
94 		return -ENOMEM;
95 
96 	if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
97 		uar->index = (uar->logic_idx - 1) %
98 			     (hr_dev->caps.phy_num_uars - 1) + 1;
99 	else
100 		uar->index = 0;
101 
102 	if (!dev_is_pci(hr_dev->dev)) {
103 		res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
104 		if (!res) {
105 			dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
106 			return -EINVAL;
107 		}
108 		uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
109 	} else {
110 		uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
111 			   >> PAGE_SHIFT);
112 	}
113 
114 	return 0;
115 }
116 
117 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
118 {
119 	hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx);
120 }
121 
122 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
123 {
124 	return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
125 				    hr_dev->caps.num_uars,
126 				    hr_dev->caps.num_uars - 1,
127 				    hr_dev->caps.reserved_uars, 0);
128 }
129 
130 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
131 {
132 	hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
133 }
134 
135 static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn)
136 {
137 	struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
138 	int id;
139 
140 	id = ida_alloc_range(&xrcd_ida->ida, xrcd_ida->min, xrcd_ida->max,
141 			     GFP_KERNEL);
142 	if (id < 0) {
143 		ibdev_err(&hr_dev->ib_dev, "failed to alloc xrcdn(%d).\n", id);
144 		return -ENOMEM;
145 	}
146 	*xrcdn = (u32)id;
147 
148 	return 0;
149 }
150 
151 void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)
152 {
153 	struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
154 
155 	ida_init(&xrcd_ida->ida);
156 	xrcd_ida->max = hr_dev->caps.num_xrcds - 1;
157 	xrcd_ida->min = hr_dev->caps.reserved_xrcds;
158 }
159 
160 int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
161 {
162 	struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
163 	struct hns_roce_xrcd *xrcd = to_hr_xrcd(ib_xrcd);
164 	int ret;
165 
166 	if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC))
167 		return -EINVAL;
168 
169 	ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn);
170 	if (ret)
171 		return ret;
172 
173 	return 0;
174 }
175 
176 int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
177 {
178 	struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
179 	u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn;
180 
181 	ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn);
182 
183 	return 0;
184 }
185