summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/mellanox/mlxfw/mlxfw_fsm.c
blob: bcd166911d444b13dcbe7b390073368116a1ac34 (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
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2017-2019 Mellanox Technologies. All rights reserved */

#define pr_fmt(fmt) "mlxfw: " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>

#include "mlxfw.h"
#include "mlxfw_mfa2.h"

#define MLXFW_FSM_STATE_WAIT_CYCLE_MS 200
#define MLXFW_FSM_STATE_WAIT_TIMEOUT_MS 30000
#define MLXFW_FSM_STATE_WAIT_ROUNDS \
	(MLXFW_FSM_STATE_WAIT_TIMEOUT_MS / MLXFW_FSM_STATE_WAIT_CYCLE_MS)
#define MLXFW_FSM_MAX_COMPONENT_SIZE (10 * (1 << 20))

static const int mlxfw_fsm_state_errno[] = {
	[MLXFW_FSM_STATE_ERR_ERROR] = -EIO,
	[MLXFW_FSM_STATE_ERR_REJECTED_DIGEST_ERR] = -EBADMSG,
	[MLXFW_FSM_STATE_ERR_REJECTED_NOT_APPLICABLE] = -ENOENT,
	[MLXFW_FSM_STATE_ERR_REJECTED_UNKNOWN_KEY] = -ENOKEY,
	[MLXFW_FSM_STATE_ERR_REJECTED_AUTH_FAILED] = -EACCES,
	[MLXFW_FSM_STATE_ERR_REJECTED_UNSIGNED] = -EKEYREVOKED,
	[MLXFW_FSM_STATE_ERR_REJECTED_KEY_NOT_APPLICABLE] = -EKEYREJECTED,
	[MLXFW_FSM_STATE_ERR_REJECTED_BAD_FORMAT] = -ENOEXEC,
	[MLXFW_FSM_STATE_ERR_BLOCKED_PENDING_RESET] = -EBUSY,
	[MLXFW_FSM_STATE_ERR_MAX] = -EINVAL
};

#define MLXFW_ERR_PRFX "Firmware flash failed: "
#define MLXFW_ERR_MSG(fwdev, extack, msg, err) do { \
	mlxfw_err(fwdev, "%s, err (%d)\n", MLXFW_ERR_PRFX msg, err); \
	NL_SET_ERR_MSG_MOD(extack, MLXFW_ERR_PRFX msg); \
} while (0)

static int mlxfw_fsm_state_err(struct mlxfw_dev *mlxfw_dev,
			       struct netlink_ext_ack *extack,
			       enum mlxfw_fsm_state_err err)
{
	enum mlxfw_fsm_state_err fsm_state_err;

	fsm_state_err = min_t(enum mlxfw_fsm_state_err, err,
			      MLXFW_FSM_STATE_ERR_MAX);

	switch (fsm_state_err) {
	case MLXFW_FSM_STATE_ERR_ERROR:
		MLXFW_ERR_MSG(mlxfw_dev, extack, "general error", err);
		break;
	case MLXFW_FSM_STATE_ERR_REJECTED_DIGEST_ERR:
		MLXFW_ERR_MSG(mlxfw_dev, extack, "component hash mismatch", err);
		break;
	case MLXFW_FSM_STATE_ERR_REJECTED_NOT_APPLICABLE:
		MLXFW_ERR_MSG(mlxfw_dev, extack, "component not applicable", err);
		break;
	case MLXFW_FSM_STATE_ERR_REJECTED_UNKNOWN_KEY:
		MLXFW_ERR_MSG(mlxfw_dev, extack, "unknown key", err);
		break;
	case MLXFW_FSM_STATE_ERR_REJECTED_AUTH_FAILED:
		MLXFW_ERR_MSG(mlxfw_dev, extack, "authentication failed", err);
		break;
	case MLXFW_FSM_STATE_ERR_REJECTED_UNSIGNED:
		MLXFW_ERR_MSG(mlxfw_dev, extack, "component was not signed", err);
		break;
	case MLXFW_FSM_STATE_ERR_REJECTED_KEY_NOT_APPLICABLE:
		MLXFW_ERR_MSG(mlxfw_dev, extack, "key not applicable", err);
		break;
	case MLXFW_FSM_STATE_ERR_REJECTED_BAD_FORMAT:
		MLXFW_ERR_MSG(mlxfw_dev, extack, "bad format", err);
		break;
	case MLXFW_FSM_STATE_ERR_BLOCKED_PENDING_RESET:
		MLXFW_ERR_MSG(mlxfw_dev, extack, "pending reset", err);
		break;
	case MLXFW_FSM_STATE_ERR_OK:
	case MLXFW_FSM_STATE_ERR_MAX:
		MLXFW_ERR_MSG(mlxfw_dev, extack, "unknown error", err);
		break;
	}

	return mlxfw_fsm_state_errno[fsm_state_err];
};

static int mlxfw_fsm_state_wait(struct mlxfw_dev *mlxfw_dev, u32 fwhandle,
				enum mlxfw_fsm_state fsm_state,
				struct netlink_ext_ack *extack)
{
	enum mlxfw_fsm_state_err fsm_state_err;
	enum mlxfw_fsm_state curr_fsm_state;
	int times;
	int err;

	times = MLXFW_FSM_STATE_WAIT_ROUNDS;
retry:
	err = mlxfw_dev->ops->fsm_query_state(mlxfw_dev, fwhandle,
					      &curr_fsm_state, &fsm_state_err);
	if (err) {
		MLXFW_ERR_MSG(mlxfw_dev, extack, "FSM state query failed", err);
		return err;
	}

	if (fsm_state_err != MLXFW_FSM_STATE_ERR_OK)
		return mlxfw_fsm_state_err(mlxfw_dev, extack, fsm_state_err);

	if (curr_fsm_state != fsm_state) {
		if (--times == 0) {
			MLXFW_ERR_MSG(mlxfw_dev, extack,
				      "Timeout reached on FSM state change", -ETIMEDOUT);
			return -ETIMEDOUT;
		}
		msleep(MLXFW_FSM_STATE_WAIT_CYCLE_MS);
		goto retry;
	}
	return 0;
}

static int
mlxfw_fsm_reactivate_err(struct mlxfw_dev *mlxfw_dev,
			 struct netlink_ext_ack *extack, u8 err)
{
	enum mlxfw_fsm_reactivate_status status;

#define MXFW_REACT_PRFX "Reactivate FSM: "
#define MLXFW_REACT_ERR(msg, err) \
	MLXFW_ERR_MSG(mlxfw_dev, extack, MXFW_REACT_PRFX msg, err)

	status = min_t(enum mlxfw_fsm_reactivate_status, err,
		       MLXFW_FSM_REACTIVATE_STATUS_MAX);

	switch (status) {
	case MLXFW_FSM_REACTIVATE_STATUS_BUSY:
		MLXFW_REACT_ERR("busy", err);
		break;
	case MLXFW_FSM_REACTIVATE_STATUS_PROHIBITED_FW_VER_ERR:
		MLXFW_REACT_ERR("prohibited fw ver", err);
		break;
	case MLXFW_FSM_REACTIVATE_STATUS_FIRST_PAGE_COPY_FAILED:
		MLXFW_REACT_ERR("first page copy failed", err);
		break;
	case MLXFW_FSM_REACTIVATE_STATUS_FIRST_PAGE_ERASE_FAILED:
		MLXFW_REACT_ERR("first page erase failed", err);
		break;
	case MLXFW_FSM_REACTIVATE_STATUS_FIRST_PAGE_RESTORE_FAILED:
		MLXFW_REACT_ERR("first page restore failed", err);
		break;
	case MLXFW_FSM_REACTIVATE_STATUS_CANDIDATE_FW_DEACTIVATION_FAILED:
		MLXFW_REACT_ERR("candidate fw deactivation failed", err);
		break;
	case MLXFW_FSM_REACTIVATE_STATUS_ERR_DEVICE_RESET_REQUIRED:
		MLXFW_REACT_ERR("device reset required", err);
		break;
	case MLXFW_FSM_REACTIVATE_STATUS_ERR_FW_PROGRAMMING_NEEDED:
		MLXFW_REACT_ERR("fw programming needed", err);
		break;
	case MLXFW_FSM_REACTIVATE_STATUS_FW_ALREADY_ACTIVATED:
		MLXFW_REACT_ERR("fw already activated", err);
		break;
	case MLXFW_FSM_REACTIVATE_STATUS_OK:
	case MLXFW_FSM_REACTIVATE_STATUS_MAX:
		MLXFW_REACT_ERR("unexpected error", err);
		break;
	}
	return -EREMOTEIO;
};

static int mlxfw_fsm_reactivate(struct mlxfw_dev *mlxfw_dev,
				struct netlink_ext_ack *extack,
				bool *supported)
{
	u8 status;
	int err;

	if (!mlxfw_dev->ops->fsm_reactivate)
		return 0;

	err = mlxfw_dev->ops->fsm_reactivate(mlxfw_dev, &status);
	if (err == -EOPNOTSUPP) {
		*supported = false;
		return 0;
	}

	if (err) {
		MLXFW_ERR_MSG(mlxfw_dev, extack,
			      "Could not reactivate firmware flash", err);
		return err;
	}

	if (status == MLXFW_FSM_REACTIVATE_STATUS_OK ||
	    status == MLXFW_FSM_REACTIVATE_STATUS_FW_ALREADY_ACTIVATED)
		return 0;

	return mlxfw_fsm_reactivate_err(mlxfw_dev, extack, status);
}

static void mlxfw_status_notify(struct mlxfw_dev *mlxfw_dev,
				const char *msg, const char *comp_name,
				u32 done_bytes, u32 total_bytes)
{
	devlink_flash_update_status_notify(mlxfw_dev->devlink, msg, comp_name,
					   done_bytes, total_bytes);
}

#define MLXFW_ALIGN_DOWN(x, align_bits) ((x) & ~((1 << (align_bits)) - 1))
#define MLXFW_ALIGN_UP(x, align_bits) \
		MLXFW_ALIGN_DOWN((x) + ((1 << (align_bits)) - 1), (align_bits))

static int mlxfw_flash_component(struct mlxfw_dev *mlxfw_dev,
				 u32 fwhandle,
				 struct mlxfw_mfa2_component *comp,
				 bool reactivate_supp,
				 struct netlink_ext_ack *extack)
{
	u16 comp_max_write_size;
	u8 comp_align_bits;
	u32 comp_max_size;
	char comp_name[8];
	u16 block_size;
	u8 *block_ptr;
	u32 offset;
	int err;

	sprintf(comp_name, "%u", comp->index);

	err = mlxfw_dev->ops->component_query(mlxfw_dev, comp->index,
					      &comp_max_size, &comp_align_bits,
					      &comp_max_write_size);
	if (err) {
		MLXFW_ERR_MSG(mlxfw_dev, extack, "FSM component query failed", err);
		return err;
	}

	comp_max_size = min_t(u32, comp_max_size, MLXFW_FSM_MAX_COMPONENT_SIZE);
	if (comp->data_size > comp_max_size) {
		MLXFW_ERR_MSG(mlxfw_dev, extack,
			      "Component size is bigger than limit", -EINVAL);
		return -EINVAL;
	}

	comp_max_write_size = MLXFW_ALIGN_DOWN(comp_max_write_size,
					       comp_align_bits);

	mlxfw_dbg(mlxfw_dev, "Component update\n");
	mlxfw_status_notify(mlxfw_dev, "Updating component", comp_name, 0, 0);
	err = mlxfw_dev->ops->fsm_component_update(mlxfw_dev, fwhandle,
						   comp->index,
						   comp->data_size);
	if (err) {
		if (!reactivate_supp)
			MLXFW_ERR_MSG(mlxfw_dev, extack,
				      "FSM component update failed, FW reactivate is not supported",
				      err);
		else
			MLXFW_ERR_MSG(mlxfw_dev, extack,
				      "FSM component update failed", err);
		return err;
	}

	err = mlxfw_fsm_state_wait(mlxfw_dev, fwhandle,
				   MLXFW_FSM_STATE_DOWNLOAD, extack);
	if (err)
		goto err_out;

	mlxfw_dbg(mlxfw_dev, "Component download\n");
	mlxfw_status_notify(mlxfw_dev, "Downloading component",
			    comp_name, 0, comp->data_size);
	for (offset = 0;
	     offset < MLXFW_ALIGN_UP(comp->data_size, comp_align_bits);
	     offset += comp_max_write_size) {
		block_ptr = comp->data + offset;
		block_size = (u16) min_t(u32, comp->data_size - offset,
					 comp_max_write_size);
		err = mlxfw_dev->ops->fsm_block_download(mlxfw_dev, fwhandle,
							 block_ptr, block_size,
							 offset);
		if (err) {
			MLXFW_ERR_MSG(mlxfw_dev, extack,
				      "Component download failed", err);
			goto err_out;
		}
		mlxfw_status_notify(mlxfw_dev, "Downloading component",
				    comp_name, offset + block_size,
				    comp->data_size);
	}

	mlxfw_dbg(mlxfw_dev, "Component verify\n");
	mlxfw_status_notify(mlxfw_dev, "Verifying component", comp_name, 0, 0);
	err = mlxfw_dev->ops->fsm_component_verify(mlxfw_dev, fwhandle,
						   comp->index);
	if (err) {
		MLXFW_ERR_MSG(mlxfw_dev, extack,
			      "FSM component verify failed", err);
		goto err_out;
	}

	err = mlxfw_fsm_state_wait(mlxfw_dev, fwhandle,
				   MLXFW_FSM_STATE_LOCKED, extack);
	if (err)
		goto err_out;
	return 0;

err_out:
	mlxfw_dev->ops->fsm_cancel(mlxfw_dev, fwhandle);
	return err;
}

static int mlxfw_flash_components(struct mlxfw_dev *mlxfw_dev, u32 fwhandle,
				  struct mlxfw_mfa2_file *mfa2_file,
				  bool reactivate_supp,
				  struct netlink_ext_ack *extack)
{
	u32 component_count;
	int err;
	int i;

	err = mlxfw_mfa2_file_component_count(mfa2_file, mlxfw_dev->psid,
					      mlxfw_dev->psid_size,
					      &component_count);
	if (err) {
		MLXFW_ERR_MSG(mlxfw_dev, extack,
			      "Could not find device PSID in MFA2 file", err);
		return err;
	}

	for (i = 0; i < component_count; i++) {
		struct mlxfw_mfa2_component *comp;

		comp = mlxfw_mfa2_file_component_get(mfa2_file, mlxfw_dev->psid,
						     mlxfw_dev->psid_size, i);
		if (IS_ERR(comp)) {
			err = PTR_ERR(comp);
			MLXFW_ERR_MSG(mlxfw_dev, extack,
				      "Failed to get MFA2 component", err);
			return err;
		}

		mlxfw_info(mlxfw_dev, "Flashing component type %d\n",
			   comp->index);
		err = mlxfw_flash_component(mlxfw_dev, fwhandle, comp,
					    reactivate_supp, extack);
		mlxfw_mfa2_file_component_put(comp);
		if (err)
			return err;
	}
	return 0;
}

int mlxfw_firmware_flash(struct mlxfw_dev *mlxfw_dev,
			 const struct firmware *firmware,
			 struct netlink_ext_ack *extack)
{
	struct mlxfw_mfa2_file *mfa2_file;
	bool reactivate_supp = true;
	u32 fwhandle;
	int err;

	if (!mlxfw_mfa2_check(firmware)) {
		MLXFW_ERR_MSG(mlxfw_dev, extack,
			      "Firmware file is not MFA2", -EINVAL);
		return -EINVAL;
	}

	mfa2_file = mlxfw_mfa2_file_init(firmware);
	if (IS_ERR(mfa2_file)) {
		err = PTR_ERR(mfa2_file);
		MLXFW_ERR_MSG(mlxfw_dev, extack,
			      "Failed to initialize MFA2 firmware file", err);
		return err;
	}

	mlxfw_info(mlxfw_dev, "Initialize firmware flash process\n");
	devlink_flash_update_begin_notify(mlxfw_dev->devlink);
	mlxfw_status_notify(mlxfw_dev, "Initializing firmware flash process",
			    NULL, 0, 0);
	err = mlxfw_dev->ops->fsm_lock(mlxfw_dev, &fwhandle);
	if (err) {
		MLXFW_ERR_MSG(mlxfw_dev, extack,
			      "Could not lock the firmware FSM", err);
		goto err_fsm_lock;
	}

	err = mlxfw_fsm_state_wait(mlxfw_dev, fwhandle,
				   MLXFW_FSM_STATE_LOCKED, extack);
	if (err)
		goto err_state_wait_idle_to_locked;

	err = mlxfw_fsm_reactivate(mlxfw_dev, extack, &reactivate_supp);
	if (err)
		goto err_fsm_reactivate;

	err = mlxfw_fsm_state_wait(mlxfw_dev, fwhandle,
				   MLXFW_FSM_STATE_LOCKED, extack);
	if (err)
		goto err_state_wait_reactivate_to_locked;

	err = mlxfw_flash_components(mlxfw_dev, fwhandle, mfa2_file,
				     reactivate_supp, extack);
	if (err)
		goto err_flash_components;

	mlxfw_dbg(mlxfw_dev, "Activate image\n");
	mlxfw_status_notify(mlxfw_dev, "Activating image", NULL, 0, 0);
	err = mlxfw_dev->ops->fsm_activate(mlxfw_dev, fwhandle);
	if (err) {
		MLXFW_ERR_MSG(mlxfw_dev, extack,
			      "Could not activate the downloaded image", err);
		goto err_fsm_activate;
	}

	err = mlxfw_fsm_state_wait(mlxfw_dev, fwhandle,
				   MLXFW_FSM_STATE_LOCKED, extack);
	if (err)
		goto err_state_wait_activate_to_locked;

	mlxfw_dbg(mlxfw_dev, "Handle release\n");
	mlxfw_dev->ops->fsm_release(mlxfw_dev, fwhandle);

	mlxfw_info(mlxfw_dev, "Firmware flash done\n");
	mlxfw_status_notify(mlxfw_dev, "Firmware flash done", NULL, 0, 0);
	mlxfw_mfa2_file_fini(mfa2_file);
	devlink_flash_update_end_notify(mlxfw_dev->devlink);
	return 0;

err_state_wait_activate_to_locked:
err_fsm_activate:
err_flash_components:
err_state_wait_reactivate_to_locked:
err_fsm_reactivate:
err_state_wait_idle_to_locked:
	mlxfw_dev->ops->fsm_release(mlxfw_dev, fwhandle);
err_fsm_lock:
	mlxfw_mfa2_file_fini(mfa2_file);
	devlink_flash_update_end_notify(mlxfw_dev->devlink);
	return err;
}
EXPORT_SYMBOL(mlxfw_firmware_flash);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Yotam Gigi <yotamg@mellanox.com>");
MODULE_DESCRIPTION("Mellanox firmware flash lib");