summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/fw/pnvm.c
blob: 895a907acdf0fb881b667b0025923b7635c71e50 (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
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/******************************************************************************
 *
 * Copyright(c) 2020 Intel Corporation
 *
 *****************************************************************************/

#include "iwl-drv.h"
#include "pnvm.h"
#include "iwl-prph.h"
#include "iwl-io.h"
#include "fw/api/commands.h"
#include "fw/api/nvm-reg.h"
#include "fw/api/alive.h"

struct iwl_pnvm_section {
	__le32 offset;
	const u8 data[];
} __packed;

static bool iwl_pnvm_complete_fn(struct iwl_notif_wait_data *notif_wait,
				 struct iwl_rx_packet *pkt, void *data)
{
	struct iwl_trans *trans = (struct iwl_trans *)data;
	struct iwl_pnvm_init_complete_ntfy *pnvm_ntf = (void *)pkt->data;

	IWL_DEBUG_FW(trans,
		     "PNVM complete notification received with status %d\n",
		     le32_to_cpu(pnvm_ntf->status));

	return true;
}

static int iwl_pnvm_handle_section(struct iwl_trans *trans, const u8 *data,
				   size_t len)
{
	struct iwl_ucode_tlv *tlv;
	u32 sha1 = 0;
	u16 mac_type = 0, rf_id = 0;
	u8 *pnvm_data = NULL, *tmp;
	u32 size = 0;
	int ret;

	IWL_DEBUG_FW(trans, "Handling PNVM section\n");

	while (len >= sizeof(*tlv)) {
		u32 tlv_len, tlv_type;

		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);
			ret = -EINVAL;
			goto out;
		}

		data += sizeof(*tlv);

		switch (tlv_type) {
		case IWL_UCODE_TLV_PNVM_VERSION:
			if (tlv_len < sizeof(__le32)) {
				IWL_DEBUG_FW(trans,
					     "Invalid size for IWL_UCODE_TLV_PNVM_VERSION (expected %zd, got %d)\n",
					     sizeof(__le32), tlv_len);
				break;
			}

			sha1 = le32_to_cpup((__le32 *)data);

			IWL_DEBUG_FW(trans,
				     "Got IWL_UCODE_TLV_PNVM_VERSION %0x\n",
				     sha1);
			break;
		case IWL_UCODE_TLV_HW_TYPE:
			if (tlv_len < 2 * sizeof(__le16)) {
				IWL_DEBUG_FW(trans,
					     "Invalid size for IWL_UCODE_TLV_HW_TYPE (expected %zd, got %d)\n",
					     2 * sizeof(__le16), tlv_len);
				break;
			}

			mac_type = le16_to_cpup((__le16 *)data);
			rf_id = le16_to_cpup((__le16 *)(data + sizeof(__le16)));

			IWL_DEBUG_FW(trans,
				     "Got IWL_UCODE_TLV_HW_TYPE mac_type 0x%0x rf_id 0x%0x\n",
				     mac_type, rf_id);

			if (mac_type != CSR_HW_REV_TYPE(trans->hw_rev) ||
			    rf_id != CSR_HW_RFID_TYPE(trans->hw_rf_id)) {
				IWL_DEBUG_FW(trans,
					     "HW mismatch, skipping PNVM section, mac_type 0x%0x, rf_id 0x%0x.\n",
					     CSR_HW_REV_TYPE(trans->hw_rev), trans->hw_rf_id);
				ret = -ENOENT;
				goto out;
			}

			break;
		case IWL_UCODE_TLV_SEC_RT: {
			struct iwl_pnvm_section *section = (void *)data;
			u32 data_len = tlv_len - sizeof(*section);

			IWL_DEBUG_FW(trans,
				     "Got IWL_UCODE_TLV_SEC_RT len %d\n",
				     tlv_len);

			/* TODO: remove, this is a deprecated separator */
			if (le32_to_cpup((__le32 *)data) == 0xddddeeee) {
				IWL_DEBUG_FW(trans, "Ignoring separator.\n");
				break;
			}

			IWL_DEBUG_FW(trans, "Adding data (size %d)\n",
				     data_len);

			tmp = krealloc(pnvm_data, size + data_len, GFP_KERNEL);
			if (!tmp) {
				IWL_DEBUG_FW(trans,
					     "Couldn't allocate (more) pnvm_data\n");

				ret = -ENOMEM;
				goto out;
			}

			pnvm_data = tmp;

			memcpy(pnvm_data + size, section->data, data_len);

			size += data_len;

			break;
		}
		case IWL_UCODE_TLV_PNVM_SKU:
			IWL_DEBUG_FW(trans,
				     "New PNVM section started, stop parsing.\n");
			goto done;
		default:
			IWL_DEBUG_FW(trans, "Found TLV 0x%0x, len %d\n",
				     tlv_type, tlv_len);
			break;
		}

		len -= ALIGN(tlv_len, 4);
		data += ALIGN(tlv_len, 4);
	}

done:
	if (!size) {
		IWL_DEBUG_FW(trans, "Empty PNVM, skipping.\n");
		ret = -ENOENT;
		goto out;
	}

	IWL_INFO(trans, "loaded PNVM version 0x%0x\n", sha1);

	ret = iwl_trans_set_pnvm(trans, pnvm_data, size);
out:
	kfree(pnvm_data);
	return ret;
}

static int iwl_pnvm_parse(struct iwl_trans *trans, const u8 *data,
			  size_t len)
{
	struct iwl_ucode_tlv *tlv;

	IWL_DEBUG_FW(trans, "Parsing PNVM file\n");

	while (len >= sizeof(*tlv)) {
		u32 tlv_len, tlv_type;

		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;
		}

		if (tlv_type == IWL_UCODE_TLV_PNVM_SKU) {
			struct iwl_sku_id *sku_id =
				(void *)(data + sizeof(*tlv));

			IWL_DEBUG_FW(trans,
				     "Got IWL_UCODE_TLV_PNVM_SKU len %d\n",
				     tlv_len);
			IWL_DEBUG_FW(trans, "sku_id 0x%0x 0x%0x 0x%0x\n",
				     le32_to_cpu(sku_id->data[0]),
				     le32_to_cpu(sku_id->data[1]),
				     le32_to_cpu(sku_id->data[2]));

			if (trans->sku_id[0] == le32_to_cpu(sku_id->data[0]) &&
			    trans->sku_id[1] == le32_to_cpu(sku_id->data[1]) &&
			    trans->sku_id[2] == le32_to_cpu(sku_id->data[2])) {
				int ret;

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

				ret = iwl_pnvm_handle_section(trans, data, len);
				if (!ret)
					return 0;
			} else {
				IWL_DEBUG_FW(trans, "SKU ID didn't match!\n");
			}
		} else {
			data += sizeof(*tlv) + ALIGN(tlv_len, 4);
			len -= ALIGN(tlv_len, 4);
		}
	}

	return -ENOENT;
}

int iwl_pnvm_load(struct iwl_trans *trans,
		  struct iwl_notif_wait_data *notif_wait)
{
	struct iwl_notification_wait pnvm_wait;
	static const u16 ntf_cmds[] = { WIDE_ID(REGULATORY_AND_NVM_GROUP,
						PNVM_INIT_COMPLETE_NTFY) };

	/* if the SKU_ID is empty, there's nothing to do */
	if (!trans->sku_id[0] && !trans->sku_id[1] && !trans->sku_id[2])
		return 0;

	/* load from disk only if we haven't done it (or tried) before */
	if (!trans->pnvm_loaded) {
		const struct firmware *pnvm;
		char pnvm_name[64];
		int ret;

		/*
		 * The prefix unfortunately includes a hyphen at the end, so
		 * don't add the dot here...
		 */
		snprintf(pnvm_name, sizeof(pnvm_name), "%spnvm",
			 trans->cfg->fw_name_pre);

		/* ...but replace the hyphen with the dot here. */
		if (strlen(trans->cfg->fw_name_pre) < sizeof(pnvm_name))
			pnvm_name[strlen(trans->cfg->fw_name_pre) - 1] = '.';

		ret = firmware_request_nowarn(&pnvm, pnvm_name, trans->dev);
		if (ret) {
			IWL_DEBUG_FW(trans, "PNVM file %s not found %d\n",
				     pnvm_name, ret);
			/*
			 * Pretend we've loaded it - at least we've tried and
			 * couldn't load it at all, so there's no point in
			 * trying again over and over.
			 */
			trans->pnvm_loaded = true;
		} else {
			iwl_pnvm_parse(trans, pnvm->data, pnvm->size);

			release_firmware(pnvm);
		}
	}

	iwl_init_notification_wait(notif_wait, &pnvm_wait,
				   ntf_cmds, ARRAY_SIZE(ntf_cmds),
				   iwl_pnvm_complete_fn, trans);

	/* kick the doorbell */
	iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
			    UREG_DOORBELL_TO_ISR6_PNVM);

	return iwl_wait_notification(notif_wait, &pnvm_wait,
				     MVM_UCODE_PNVM_TIMEOUT);
}
IWL_EXPORT_SYMBOL(iwl_pnvm_load);