1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
/*
* Copyright (c) 2016 Hisilicon Limited.
* Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/platform_device.h>
#include <linux/vmalloc.h>
#include "hns_roce_device.h"
#include <rdma/ib_umem.h>
void hns_roce_buf_free(struct hns_roce_dev *hr_dev, struct hns_roce_buf *buf)
{
struct hns_roce_buf_list *trunks;
u32 i;
if (!buf)
return;
trunks = buf->trunk_list;
if (trunks) {
buf->trunk_list = NULL;
for (i = 0; i < buf->ntrunks; i++)
dma_free_coherent(hr_dev->dev, 1 << buf->trunk_shift,
trunks[i].buf, trunks[i].map);
kfree(trunks);
}
kfree(buf);
}
/*
* Allocate the dma buffer for storing ROCEE table entries
*
* @size: required size
* @page_shift: the unit size in a continuous dma address range
* @flags: HNS_ROCE_BUF_ flags to control the allocation flow.
*/
struct hns_roce_buf *hns_roce_buf_alloc(struct hns_roce_dev *hr_dev, u32 size,
u32 page_shift, u32 flags)
{
u32 trunk_size, page_size, alloced_size;
struct hns_roce_buf_list *trunks;
struct hns_roce_buf *buf;
gfp_t gfp_flags;
u32 ntrunk, i;
/* The minimum shift of the page accessed by hw is HNS_HW_PAGE_SHIFT */
if (WARN_ON(page_shift < HNS_HW_PAGE_SHIFT))
return ERR_PTR(-EINVAL);
gfp_flags = (flags & HNS_ROCE_BUF_NOSLEEP) ? GFP_ATOMIC : GFP_KERNEL;
buf = kzalloc(sizeof(*buf), gfp_flags);
if (!buf)
return ERR_PTR(-ENOMEM);
buf->page_shift = page_shift;
page_size = 1 << buf->page_shift;
/* Calc the trunk size and num by required size and page_shift */
if (flags & HNS_ROCE_BUF_DIRECT) {
buf->trunk_shift = order_base_2(ALIGN(size, PAGE_SIZE));
ntrunk = 1;
} else {
buf->trunk_shift = order_base_2(ALIGN(page_size, PAGE_SIZE));
ntrunk = DIV_ROUND_UP(size, 1 << buf->trunk_shift);
}
trunks = kcalloc(ntrunk, sizeof(*trunks), gfp_flags);
if (!trunks) {
kfree(buf);
return ERR_PTR(-ENOMEM);
}
trunk_size = 1 << buf->trunk_shift;
alloced_size = 0;
for (i = 0; i < ntrunk; i++) {
trunks[i].buf = dma_alloc_coherent(hr_dev->dev, trunk_size,
&trunks[i].map, gfp_flags);
if (!trunks[i].buf)
break;
alloced_size += trunk_size;
}
buf->ntrunks = i;
/* In nofail mode, it's only failed when the alloced size is 0 */
if ((flags & HNS_ROCE_BUF_NOFAIL) ? i == 0 : i != ntrunk) {
for (i = 0; i < buf->ntrunks; i++)
dma_free_coherent(hr_dev->dev, trunk_size,
trunks[i].buf, trunks[i].map);
kfree(trunks);
kfree(buf);
return ERR_PTR(-ENOMEM);
}
buf->npages = DIV_ROUND_UP(alloced_size, page_size);
buf->trunk_list = trunks;
return buf;
}
int hns_roce_get_kmem_bufs(struct hns_roce_dev *hr_dev, dma_addr_t *bufs,
int buf_cnt, struct hns_roce_buf *buf,
unsigned int page_shift)
{
unsigned int offset, max_size;
int total = 0;
int i;
if (page_shift > buf->trunk_shift) {
dev_err(hr_dev->dev, "failed to check kmem buf shift %u > %u\n",
page_shift, buf->trunk_shift);
return -EINVAL;
}
offset = 0;
max_size = buf->ntrunks << buf->trunk_shift;
for (i = 0; i < buf_cnt && offset < max_size; i++) {
bufs[total++] = hns_roce_buf_dma_addr(buf, offset);
offset += (1 << page_shift);
}
return total;
}
int hns_roce_get_umem_bufs(struct hns_roce_dev *hr_dev, dma_addr_t *bufs,
int buf_cnt, struct ib_umem *umem,
unsigned int page_shift)
{
struct ib_block_iter biter;
int total = 0;
/* convert system page cnt to hw page cnt */
rdma_umem_for_each_dma_block(umem, &biter, 1 << page_shift) {
bufs[total++] = rdma_block_iter_dma_address(&biter);
if (total >= buf_cnt)
goto done;
}
done:
return total;
}
void hns_roce_cleanup_bitmap(struct hns_roce_dev *hr_dev)
{
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC)
ida_destroy(&hr_dev->xrcd_ida.ida);
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SRQ)
ida_destroy(&hr_dev->srq_table.srq_ida.ida);
hns_roce_cleanup_qp_table(hr_dev);
hns_roce_cleanup_cq_table(hr_dev);
ida_destroy(&hr_dev->mr_table.mtpt_ida.ida);
ida_destroy(&hr_dev->pd_ida.ida);
ida_destroy(&hr_dev->uar_ida.ida);
}
|
