summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
blob: 43d815cb3ce9d86bfa00974390605575067b2ea9 (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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright (C) 2018 Intel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright (C) 2018 Intel Corporation
 * All rights reserved.
 *
 * 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.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/

#include <linux/firmware.h>
#include "iwl-trans.h"
#include "iwl-dbg-tlv.h"

void iwl_fw_dbg_copy_tlv(struct iwl_trans *trans, struct iwl_ucode_tlv *tlv,
			 bool ext)
{
	struct iwl_apply_point_data *data;
	struct iwl_fw_ini_header *header = (void *)&tlv->data[0];
	u32 apply_point = le32_to_cpu(header->apply_point);

	int copy_size = le32_to_cpu(tlv->length) + sizeof(*tlv);

	if (WARN_ONCE(apply_point >= IWL_FW_INI_APPLY_NUM,
		      "Invalid apply point id %d\n", apply_point))
		return;

	if (ext)
		data = &trans->apply_points_ext[apply_point];
	else
		data = &trans->apply_points[apply_point];

	/*
	 * Make sure we still have room to copy this TLV. Offset points to the
	 * location the last copy ended.
	 */
	if (WARN_ONCE(data->offset + copy_size > data->size,
		      "Not enough memory for apply point %d\n",
		      apply_point))
		return;

	memcpy(data->data + data->offset, (void *)tlv, copy_size);
	data->offset += copy_size;
}

void iwl_alloc_dbg_tlv(struct iwl_trans *trans, size_t len, const u8 *data,
		       bool ext)
{
	struct iwl_ucode_tlv *tlv;
	u32 size[IWL_FW_INI_APPLY_NUM] = {0};
	int i;

	while (len >= sizeof(*tlv)) {
		u32 tlv_len, tlv_type, apply;
		struct iwl_fw_ini_header *hdr;

		len -= sizeof(*tlv);
		tlv = (void *)data;

		tlv_len = le32_to_cpu(tlv->length);
		tlv_type = le32_to_cpu(tlv->type);

		if (len < tlv_len)
			return;

		len -= ALIGN(tlv_len, 4);
		data += sizeof(*tlv) + ALIGN(tlv_len, 4);

		if (!(tlv_type & IWL_UCODE_INI_TLV_GROUP))
			continue;

		hdr = (void *)&tlv->data[0];
		apply = le32_to_cpu(hdr->apply_point);

		IWL_DEBUG_FW(trans, "Read TLV %x, apply point %d\n",
			     le32_to_cpu(tlv->type), apply);

		if (WARN_ON(apply >= IWL_FW_INI_APPLY_NUM))
			continue;

		size[apply] += sizeof(*tlv) + tlv_len;
	}

	for (i = 0; i < ARRAY_SIZE(size); i++) {
		void *mem;

		if (!size[i])
			continue;

		mem = kzalloc(size[i], GFP_KERNEL);

		if (!mem) {
			IWL_ERR(trans, "No memory for apply point %d\n", i);
			return;
		}

		if (ext) {
			trans->apply_points_ext[i].data = mem;
			trans->apply_points_ext[i].size = size[i];
		} else {
			trans->apply_points[i].data = mem;
			trans->apply_points[i].size = size[i];
		}

		trans->ini_valid = true;
	}
}

void iwl_fw_dbg_free(struct iwl_trans *trans)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(trans->apply_points); i++) {
		kfree(trans->apply_points[i].data);
		trans->apply_points[i].size = 0;
		trans->apply_points[i].offset = 0;

		kfree(trans->apply_points_ext[i].data);
		trans->apply_points_ext[i].size = 0;
		trans->apply_points_ext[i].offset = 0;
	}
}

static int iwl_parse_fw_dbg_tlv(struct iwl_trans *trans, const u8 *data,
				size_t len)
{
	struct iwl_ucode_tlv *tlv;
	enum iwl_ucode_tlv_type tlv_type;
	u32 tlv_len;

	while (len >= sizeof(*tlv)) {
		len -= sizeof(*tlv);
		tlv = (void *)data;

		tlv_len = le32_to_cpu(tlv->length);
		tlv_type = le32_to_cpu(tlv->type);

		if (len < tlv_len) {
			IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
				len, tlv_len);
			return -EINVAL;
		}
		len -= ALIGN(tlv_len, 4);
		data += sizeof(*tlv) + ALIGN(tlv_len, 4);

		switch (tlv_type) {
		case IWL_UCODE_TLV_TYPE_BUFFER_ALLOCATION:
		case IWL_UCODE_TLV_TYPE_HCMD:
		case IWL_UCODE_TLV_TYPE_REGIONS:
		case IWL_UCODE_TLV_TYPE_TRIGGERS:
		case IWL_UCODE_TLV_TYPE_DEBUG_FLOW:
			iwl_fw_dbg_copy_tlv(trans, tlv, true);
			break;
		default:
			WARN_ONCE(1, "Invalid TLV %x\n", tlv_type);
			break;
		}
	}

	return 0;
}

void iwl_load_fw_dbg_tlv(struct device *dev, struct iwl_trans *trans)
{
	const struct firmware *fw;
	int res;

	if (trans->external_ini_loaded || !iwlwifi_mod_params.enable_ini)
		return;

	res = request_firmware(&fw, "iwl-dbg-tlv.ini", dev);
	if (res)
		return;

	iwl_alloc_dbg_tlv(trans, fw->size, fw->data, true);
	iwl_parse_fw_dbg_tlv(trans, fw->data, fw->size);

	trans->external_ini_loaded = true;
	release_firmware(fw);
}