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 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);
40 }
41 
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 
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 
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 
59 struct ib_pd *hns_roce_alloc_pd(struct ib_device *ib_dev,
60 				struct ib_ucontext *context,
61 				struct ib_udata *udata)
62 {
63 	struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
64 	struct device *dev = hr_dev->dev;
65 	struct hns_roce_pd *pd;
66 	int ret;
67 
68 	pd = kmalloc(sizeof(*pd), GFP_KERNEL);
69 	if (!pd)
70 		return ERR_PTR(-ENOMEM);
71 
72 	ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
73 	if (ret) {
74 		kfree(pd);
75 		dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n");
76 		return ERR_PTR(ret);
77 	}
78 
79 	if (context) {
80 		if (ib_copy_to_udata(udata, &pd->pdn, sizeof(u64))) {
81 			hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
82 			dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n");
83 			kfree(pd);
84 			return ERR_PTR(-EFAULT);
85 		}
86 	}
87 
88 	return &pd->ibpd;
89 }
90 EXPORT_SYMBOL_GPL(hns_roce_alloc_pd);
91 
92 int hns_roce_dealloc_pd(struct ib_pd *pd)
93 {
94 	hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
95 	kfree(to_hr_pd(pd));
96 
97 	return 0;
98 }
99 EXPORT_SYMBOL_GPL(hns_roce_dealloc_pd);
100 
101 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
102 {
103 	struct resource *res;
104 	int ret = 0;
105 
106 	/* Using bitmap to manager UAR index */
107 	ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->index);
108 	if (ret == -1)
109 		return -ENOMEM;
110 
111 	if (uar->index > 0)
112 		uar->index = (uar->index - 1) %
113 			     (hr_dev->caps.phy_num_uars - 1) + 1;
114 
115 	if (!dev_is_pci(hr_dev->dev)) {
116 		res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
117 		if (!res) {
118 			dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
119 			return -EINVAL;
120 		}
121 		uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
122 	} else {
123 		uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
124 			   >> PAGE_SHIFT);
125 	}
126 
127 	return 0;
128 }
129 
130 void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
131 {
132 	hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->index,
133 			     BITMAP_NO_RR);
134 }
135 
136 int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
137 {
138 	return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
139 				    hr_dev->caps.num_uars,
140 				    hr_dev->caps.num_uars - 1,
141 				    hr_dev->caps.reserved_uars, 0);
142 }
143 
144 void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
145 {
146 	hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
147 }
148