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
|
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2018 Netronome Systems, Inc. */
#include <linux/bitfield.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include "nfp_net_ctrl.h"
#include "nfp_net.h"
static void nfp_net_tlv_caps_reset(struct nfp_net_tlv_caps *caps)
{
memset(caps, 0, sizeof(*caps));
caps->me_freq_mhz = 1200;
caps->mbox_off = NFP_NET_CFG_MBOX_BASE;
caps->mbox_len = NFP_NET_CFG_MBOX_VAL_MAX_SZ;
}
int nfp_net_tlv_caps_parse(struct device *dev, u8 __iomem *ctrl_mem,
struct nfp_net_tlv_caps *caps)
{
u8 __iomem *data = ctrl_mem + NFP_NET_CFG_TLV_BASE;
u8 __iomem *end = ctrl_mem + NFP_NET_CFG_BAR_SZ;
u32 hdr;
nfp_net_tlv_caps_reset(caps);
hdr = readl(data);
if (!hdr)
return 0;
while (true) {
unsigned int length, offset;
u32 hdr = readl(data);
length = FIELD_GET(NFP_NET_CFG_TLV_HEADER_LENGTH, hdr);
offset = data - ctrl_mem;
/* Advance past the header */
data += 4;
if (length % NFP_NET_CFG_TLV_LENGTH_INC) {
dev_err(dev, "TLV size not multiple of %u offset:%u len:%u\n",
NFP_NET_CFG_TLV_LENGTH_INC, offset, length);
return -EINVAL;
}
if (data + length > end) {
dev_err(dev, "oversized TLV offset:%u len:%u\n",
offset, length);
return -EINVAL;
}
switch (FIELD_GET(NFP_NET_CFG_TLV_HEADER_TYPE, hdr)) {
case NFP_NET_CFG_TLV_TYPE_UNKNOWN:
dev_err(dev, "NULL TLV at offset:%u\n", offset);
return -EINVAL;
case NFP_NET_CFG_TLV_TYPE_RESERVED:
break;
case NFP_NET_CFG_TLV_TYPE_END:
if (!length)
return 0;
dev_err(dev, "END TLV should be empty, has offset:%u len:%d\n",
offset, length);
return -EINVAL;
case NFP_NET_CFG_TLV_TYPE_ME_FREQ:
if (length != 4) {
dev_err(dev,
"ME FREQ TLV should be 4B, is %dB offset:%u\n",
length, offset);
return -EINVAL;
}
caps->me_freq_mhz = readl(data);
break;
case NFP_NET_CFG_TLV_TYPE_MBOX:
if (!length) {
caps->mbox_off = 0;
caps->mbox_len = 0;
} else {
caps->mbox_off = data - ctrl_mem;
caps->mbox_len = length;
}
break;
case NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL0:
case NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL1:
dev_warn(dev,
"experimental TLV type:%u offset:%u len:%u\n",
FIELD_GET(NFP_NET_CFG_TLV_HEADER_TYPE, hdr),
offset, length);
break;
case NFP_NET_CFG_TLV_TYPE_REPR_CAP:
if (length < 4) {
dev_err(dev, "REPR CAP TLV short %dB < 4B offset:%u\n",
length, offset);
return -EINVAL;
}
caps->repr_cap = readl(data);
break;
case NFP_NET_CFG_TLV_TYPE_MBOX_CMSG_TYPES:
if (length >= 4)
caps->mbox_cmsg_types = readl(data);
break;
case NFP_NET_CFG_TLV_TYPE_CRYPTO_OPS:
if (length < 32) {
dev_err(dev,
"CRYPTO OPS TLV should be at least 32B, is %dB offset:%u\n",
length, offset);
return -EINVAL;
}
caps->crypto_ops = readl(data);
caps->crypto_enable_off = data - ctrl_mem + 16;
break;
default:
if (!FIELD_GET(NFP_NET_CFG_TLV_HEADER_REQUIRED, hdr))
break;
dev_err(dev, "unknown TLV type:%u offset:%u len:%u\n",
FIELD_GET(NFP_NET_CFG_TLV_HEADER_TYPE, hdr),
offset, length);
return -EINVAL;
}
data += length;
if (data + 4 > end) {
dev_err(dev, "reached end of BAR without END TLV\n");
return -EINVAL;
}
}
/* Not reached */
return -EINVAL;
}
|
