summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath12k/fw.c
blob: 5be4b2d4a19d8920042b7b05460aecf380490c4f (plain)
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
// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
 * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
 */

#include "core.h"

#include "debug.h"

static int ath12k_fw_request_firmware_api_n(struct ath12k_base *ab,
					    const char *name)
{
	size_t magic_len, len, ie_len;
	int ie_id, i, index, bit, ret;
	struct ath12k_fw_ie *hdr;
	const u8 *data;
	__le32 *timestamp;

	ab->fw.fw = ath12k_core_firmware_request(ab, name);
	if (IS_ERR(ab->fw.fw)) {
		ret = PTR_ERR(ab->fw.fw);
		ath12k_dbg(ab, ATH12K_DBG_BOOT, "failed to load %s: %d\n", name, ret);
		ab->fw.fw = NULL;
		return ret;
	}

	data = ab->fw.fw->data;
	len = ab->fw.fw->size;

	/* magic also includes the null byte, check that as well */
	magic_len = strlen(ATH12K_FIRMWARE_MAGIC) + 1;

	if (len < magic_len) {
		ath12k_err(ab, "firmware image too small to contain magic: %zu\n",
			   len);
		ret = -EINVAL;
		goto err;
	}

	if (memcmp(data, ATH12K_FIRMWARE_MAGIC, magic_len) != 0) {
		ath12k_err(ab, "Invalid firmware magic\n");
		ret = -EINVAL;
		goto err;
	}

	/* jump over the padding */
	magic_len = ALIGN(magic_len, 4);

	/* make sure there's space for padding */
	if (magic_len > len) {
		ath12k_err(ab, "No space for padding after magic\n");
		ret = -EINVAL;
		goto err;
	}

	len -= magic_len;
	data += magic_len;

	/* loop elements */
	while (len > sizeof(struct ath12k_fw_ie)) {
		hdr = (struct ath12k_fw_ie *)data;

		ie_id = le32_to_cpu(hdr->id);
		ie_len = le32_to_cpu(hdr->len);

		len -= sizeof(*hdr);
		data += sizeof(*hdr);

		if (len < ie_len) {
			ath12k_err(ab, "Invalid length for FW IE %d (%zu < %zu)\n",
				   ie_id, len, ie_len);
			ret = -EINVAL;
			goto err;
		}

		switch (ie_id) {
		case ATH12K_FW_IE_TIMESTAMP:
			if (ie_len != sizeof(u32))
				break;

			timestamp = (__le32 *)data;

			ath12k_dbg(ab, ATH12K_DBG_BOOT, "found fw timestamp %d\n",
				   le32_to_cpup(timestamp));
			break;
		case ATH12K_FW_IE_FEATURES:
			ath12k_dbg(ab, ATH12K_DBG_BOOT,
				   "found firmware features ie (%zd B)\n",
				   ie_len);

			for (i = 0; i < ATH12K_FW_FEATURE_COUNT; i++) {
				index = i / 8;
				bit = i % 8;

				if (index == ie_len)
					break;

				if (data[index] & (1 << bit))
					__set_bit(i, ab->fw.fw_features);
			}

			ath12k_dbg_dump(ab, ATH12K_DBG_BOOT, "features", "",
					ab->fw.fw_features,
					sizeof(ab->fw.fw_features));
			break;
		case ATH12K_FW_IE_AMSS_IMAGE:
			ath12k_dbg(ab, ATH12K_DBG_BOOT,
				   "found fw image ie (%zd B)\n",
				   ie_len);

			ab->fw.amss_data = data;
			ab->fw.amss_len = ie_len;
			break;
		case ATH12K_FW_IE_M3_IMAGE:
			ath12k_dbg(ab, ATH12K_DBG_BOOT,
				   "found m3 image ie (%zd B)\n",
				   ie_len);

			ab->fw.m3_data = data;
			ab->fw.m3_len = ie_len;
			break;
		case ATH12K_FW_IE_AMSS_DUALMAC_IMAGE:
			ath12k_dbg(ab, ATH12K_DBG_BOOT,
				   "found dualmac fw image ie (%zd B)\n",
				   ie_len);
			ab->fw.amss_dualmac_data = data;
			ab->fw.amss_dualmac_len = ie_len;
			break;
		default:
			ath12k_warn(ab, "Unknown FW IE: %u\n", ie_id);
			break;
		}

		/* jump over the padding */
		ie_len = ALIGN(ie_len, 4);

		/* make sure there's space for padding */
		if (ie_len > len)
			break;

		len -= ie_len;
		data += ie_len;
	}

	return 0;

err:
	release_firmware(ab->fw.fw);
	ab->fw.fw = NULL;
	return ret;
}

void ath12k_fw_map(struct ath12k_base *ab)
{
	int ret;

	ret = ath12k_fw_request_firmware_api_n(ab, ATH12K_FW_API2_FILE);
	if (ret == 0)
		ab->fw.api_version = 2;
	else
		ab->fw.api_version = 1;

	ath12k_dbg(ab, ATH12K_DBG_BOOT, "using fw api %d\n",
		   ab->fw.api_version);
}

void ath12k_fw_unmap(struct ath12k_base *ab)
{
	release_firmware(ab->fw.fw);
	memset(&ab->fw, 0, sizeof(ab->fw));
}