summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/iwlwifi/iwl-test.c
blob: 5cfd55b86ed3d33a779ab512bbc2df7c637f0f53 (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
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
/******************************************************************************
 *
 * 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) 2010 - 2013 Intel Corporation. All rights reserved.
 *
 * 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; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2010 - 2013 Intel Corporation. All rights reserved.
 * 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/export.h>
#include <net/netlink.h>

#include "iwl-drv.h"
#include "iwl-io.h"
#include "iwl-fh.h"
#include "iwl-prph.h"
#include "iwl-trans.h"
#include "iwl-test.h"
#include "iwl-csr.h"
#include "iwl-testmode.h"

/*
 * Periphery registers absolute lower bound. This is used in order to
 * differentiate registery access through HBUS_TARG_PRPH_* and
 * HBUS_TARG_MEM_* accesses.
 */
#define IWL_ABS_PRPH_START (0xA00000)

/*
 * The TLVs used in the gnl message policy between the kernel module and
 * user space application. iwl_testmode_gnl_msg_policy is to be carried
 * through the NL80211_CMD_TESTMODE channel regulated by nl80211.
 * See iwl-testmode.h
 */
static
struct nla_policy iwl_testmode_gnl_msg_policy[IWL_TM_ATTR_MAX] = {
	[IWL_TM_ATTR_COMMAND] = { .type = NLA_U32, },

	[IWL_TM_ATTR_UCODE_CMD_ID] = { .type = NLA_U8, },
	[IWL_TM_ATTR_UCODE_CMD_DATA] = { .type = NLA_UNSPEC, },

	[IWL_TM_ATTR_REG_OFFSET] = { .type = NLA_U32, },
	[IWL_TM_ATTR_REG_VALUE8] = { .type = NLA_U8, },
	[IWL_TM_ATTR_REG_VALUE32] = { .type = NLA_U32, },

	[IWL_TM_ATTR_SYNC_RSP] = { .type = NLA_UNSPEC, },
	[IWL_TM_ATTR_UCODE_RX_PKT] = { .type = NLA_UNSPEC, },

	[IWL_TM_ATTR_EEPROM] = { .type = NLA_UNSPEC, },

	[IWL_TM_ATTR_TRACE_ADDR] = { .type = NLA_UNSPEC, },
	[IWL_TM_ATTR_TRACE_DUMP] = { .type = NLA_UNSPEC, },
	[IWL_TM_ATTR_TRACE_SIZE] = { .type = NLA_U32, },

	[IWL_TM_ATTR_FIXRATE] = { .type = NLA_U32, },

	[IWL_TM_ATTR_UCODE_OWNER] = { .type = NLA_U8, },

	[IWL_TM_ATTR_MEM_ADDR] = { .type = NLA_U32, },
	[IWL_TM_ATTR_BUFFER_SIZE] = { .type = NLA_U32, },
	[IWL_TM_ATTR_BUFFER_DUMP] = { .type = NLA_UNSPEC, },

	[IWL_TM_ATTR_FW_VERSION] = { .type = NLA_U32, },
	[IWL_TM_ATTR_DEVICE_ID] = { .type = NLA_U32, },
	[IWL_TM_ATTR_FW_TYPE] = { .type = NLA_U32, },
	[IWL_TM_ATTR_FW_INST_SIZE] = { .type = NLA_U32, },
	[IWL_TM_ATTR_FW_DATA_SIZE] = { .type = NLA_U32, },

	[IWL_TM_ATTR_ENABLE_NOTIFICATION] = {.type = NLA_FLAG, },
};

static inline void iwl_test_trace_clear(struct iwl_test *tst)
{
	memset(&tst->trace, 0, sizeof(struct iwl_test_trace));
}

static void iwl_test_trace_stop(struct iwl_test *tst)
{
	if (!tst->trace.enabled)
		return;

	if (tst->trace.cpu_addr && tst->trace.dma_addr)
		dma_free_coherent(tst->trans->dev,
				  tst->trace.tsize,
				  tst->trace.cpu_addr,
				  tst->trace.dma_addr);

	iwl_test_trace_clear(tst);
}

static inline void iwl_test_mem_clear(struct iwl_test *tst)
{
	memset(&tst->mem, 0, sizeof(struct iwl_test_mem));
}

static inline void iwl_test_mem_stop(struct iwl_test *tst)
{
	if (!tst->mem.in_read)
		return;

	iwl_test_mem_clear(tst);
}

/*
 * Initializes the test object
 * During the lifetime of the test object it is assumed that the transport is
 * started. The test object should be stopped before the transport is stopped.
 */
void iwl_test_init(struct iwl_test *tst, struct iwl_trans *trans,
		   struct iwl_test_ops *ops)
{
	tst->trans = trans;
	tst->ops = ops;

	iwl_test_trace_clear(tst);
	iwl_test_mem_clear(tst);
}
EXPORT_SYMBOL_GPL(iwl_test_init);

/*
 * Stop the test object
 */
void iwl_test_free(struct iwl_test *tst)
{
	iwl_test_mem_stop(tst);
	iwl_test_trace_stop(tst);
}
EXPORT_SYMBOL_GPL(iwl_test_free);

static inline int iwl_test_send_cmd(struct iwl_test *tst,
				    struct iwl_host_cmd *cmd)
{
	return tst->ops->send_cmd(tst->trans->op_mode, cmd);
}

static inline bool iwl_test_valid_hw_addr(struct iwl_test *tst, u32 addr)
{
	return tst->ops->valid_hw_addr(addr);
}

static inline u32 iwl_test_fw_ver(struct iwl_test *tst)
{
	return tst->ops->get_fw_ver(tst->trans->op_mode);
}

static inline struct sk_buff*
iwl_test_alloc_reply(struct iwl_test *tst, int len)
{
	return tst->ops->alloc_reply(tst->trans->op_mode, len);
}

static inline int iwl_test_reply(struct iwl_test *tst, struct sk_buff *skb)
{
	return tst->ops->reply(tst->trans->op_mode, skb);
}

static inline struct sk_buff*
iwl_test_alloc_event(struct iwl_test *tst, int len)
{
	return tst->ops->alloc_event(tst->trans->op_mode, len);
}

static inline void
iwl_test_event(struct iwl_test *tst, struct sk_buff *skb)
{
	return tst->ops->event(tst->trans->op_mode, skb);
}

/*
 * This function handles the user application commands to the fw. The fw
 * commands are sent in a synchronuous manner. In case that the user requested
 * to get commands response, it is send to the user.
 */
static int iwl_test_fw_cmd(struct iwl_test *tst, struct nlattr **tb)
{
	struct iwl_host_cmd cmd;
	struct iwl_rx_packet *pkt;
	struct sk_buff *skb;
	void *reply_buf;
	u32 reply_len;
	int ret;
	bool cmd_want_skb;

	memset(&cmd, 0, sizeof(struct iwl_host_cmd));

	if (!tb[IWL_TM_ATTR_UCODE_CMD_ID] ||
	    !tb[IWL_TM_ATTR_UCODE_CMD_DATA]) {
		IWL_ERR(tst->trans, "Missing fw command mandatory fields\n");
		return -ENOMSG;
	}

	cmd.flags = CMD_ON_DEMAND | CMD_SYNC;
	cmd_want_skb = nla_get_flag(tb[IWL_TM_ATTR_UCODE_CMD_SKB]);
	if (cmd_want_skb)
		cmd.flags |= CMD_WANT_SKB;

	cmd.id = nla_get_u8(tb[IWL_TM_ATTR_UCODE_CMD_ID]);
	cmd.data[0] = nla_data(tb[IWL_TM_ATTR_UCODE_CMD_DATA]);
	cmd.len[0] = nla_len(tb[IWL_TM_ATTR_UCODE_CMD_DATA]);
	cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
	IWL_DEBUG_INFO(tst->trans, "test fw cmd=0x%x, flags 0x%x, len %d\n",
		       cmd.id, cmd.flags, cmd.len[0]);

	ret = iwl_test_send_cmd(tst, &cmd);
	if (ret) {
		IWL_ERR(tst->trans, "Failed to send hcmd\n");
		return ret;
	}
	if (!cmd_want_skb)
		return ret;

	/* Handling return of SKB to the user */
	pkt = cmd.resp_pkt;
	if (!pkt) {
		IWL_ERR(tst->trans, "HCMD received a null response packet\n");
		return ret;
	}

	reply_len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
	skb = iwl_test_alloc_reply(tst, reply_len + 20);
	reply_buf = kmemdup(&pkt->hdr, reply_len, GFP_KERNEL);
	if (!skb || !reply_buf) {
		kfree_skb(skb);
		kfree(reply_buf);
		return -ENOMEM;
	}

	/* The reply is in a page, that we cannot send to user space. */
	iwl_free_resp(&cmd);

	if (nla_put_u32(skb, IWL_TM_ATTR_COMMAND,
			IWL_TM_CMD_DEV2APP_UCODE_RX_PKT) ||
	    nla_put(skb, IWL_TM_ATTR_UCODE_RX_PKT, reply_len, reply_buf))
		goto nla_put_failure;
	return iwl_test_reply(tst, skb);

nla_put_failure:
	IWL_DEBUG_INFO(tst->trans, "Failed creating NL attributes\n");
	kfree(reply_buf);
	kfree_skb(skb);
	return -ENOMSG;
}

/*
 * Handles the user application commands for register access.
 */
static int iwl_test_reg(struct iwl_test *tst, struct nlattr **tb)
{
	u32 ofs, val32, cmd;
	u8 val8;
	struct sk_buff *skb;
	int status = 0;
	struct iwl_trans *trans = tst->trans;

	if (!tb[IWL_TM_ATTR_REG_OFFSET]) {
		IWL_ERR(trans, "Missing reg offset\n");
		return -ENOMSG;
	}

	ofs = nla_get_u32(tb[IWL_TM_ATTR_REG_OFFSET]);
	IWL_DEBUG_INFO(trans, "test reg access cmd offset=0x%x\n", ofs);

	cmd = nla_get_u32(tb[IWL_TM_ATTR_COMMAND]);

	/*
	 * Allow access only to FH/CSR/HBUS in direct mode.
	 * Since we don't have the upper bounds for the CSR and HBUS segments,
	 * we will use only the upper bound of FH for sanity check.
	 */
	if (ofs >= FH_MEM_UPPER_BOUND) {
		IWL_ERR(trans, "offset out of segment (0x0 - 0x%x)\n",
			FH_MEM_UPPER_BOUND);
		return -EINVAL;
	}

	switch (cmd) {
	case IWL_TM_CMD_APP2DEV_DIRECT_REG_READ32:
		val32 = iwl_read_direct32(tst->trans, ofs);
		IWL_DEBUG_INFO(trans, "32 value to read 0x%x\n", val32);

		skb = iwl_test_alloc_reply(tst, 20);
		if (!skb) {
			IWL_ERR(trans, "Memory allocation fail\n");
			return -ENOMEM;
		}
		if (nla_put_u32(skb, IWL_TM_ATTR_REG_VALUE32, val32))
			goto nla_put_failure;
		status = iwl_test_reply(tst, skb);
		if (status < 0)
			IWL_ERR(trans, "Error sending msg : %d\n", status);
		break;

	case IWL_TM_CMD_APP2DEV_DIRECT_REG_WRITE32:
		if (!tb[IWL_TM_ATTR_REG_VALUE32]) {
			IWL_ERR(trans, "Missing value to write\n");
			return -ENOMSG;
		} else {
			val32 = nla_get_u32(tb[IWL_TM_ATTR_REG_VALUE32]);
			IWL_DEBUG_INFO(trans, "32b write val=0x%x\n", val32);
			iwl_write_direct32(tst->trans, ofs, val32);
		}
		break;

	case IWL_TM_CMD_APP2DEV_DIRECT_REG_WRITE8:
		if (!tb[IWL_TM_ATTR_REG_VALUE8]) {
			IWL_ERR(trans, "Missing value to write\n");
			return -ENOMSG;
		} else {
			val8 = nla_get_u8(tb[IWL_TM_ATTR_REG_VALUE8]);
			IWL_DEBUG_INFO(trans, "8b write val=0x%x\n", val8);
			iwl_write8(tst->trans, ofs, val8);
		}
		break;

	default:
		IWL_ERR(trans, "Unknown test register cmd ID\n");
		return -ENOMSG;
	}

	return status;

nla_put_failure:
	kfree_skb(skb);
	return -EMSGSIZE;
}

/*
 * Handles the request to start FW tracing. Allocates of the trace buffer
 * and sends a reply to user space with the address of the allocated buffer.
 */
static int iwl_test_trace_begin(struct iwl_test *tst, struct nlattr **tb)
{
	struct sk_buff *skb;
	int status = 0;

	if (tst->trace.enabled)
		return -EBUSY;

	if (!tb[IWL_TM_ATTR_TRACE_SIZE])
		tst->trace.size = TRACE_BUFF_SIZE_DEF;
	else
		tst->trace.size =
			nla_get_u32(tb[IWL_TM_ATTR_TRACE_SIZE]);

	if (!tst->trace.size)
		return -EINVAL;

	if (tst->trace.size < TRACE_BUFF_SIZE_MIN ||
	    tst->trace.size > TRACE_BUFF_SIZE_MAX)
		return -EINVAL;

	tst->trace.tsize = tst->trace.size + TRACE_BUFF_PADD;
	tst->trace.cpu_addr = dma_alloc_coherent(tst->trans->dev,
						 tst->trace.tsize,
						 &tst->trace.dma_addr,
						 GFP_KERNEL);
	if (!tst->trace.cpu_addr)
		return -ENOMEM;

	tst->trace.enabled = true;
	tst->trace.trace_addr = (u8 *)PTR_ALIGN(tst->trace.cpu_addr, 0x100);

	memset(tst->trace.trace_addr, 0x03B, tst->trace.size);

	skb = iwl_test_alloc_reply(tst, sizeof(tst->trace.dma_addr) + 20);
	if (!skb) {
		IWL_ERR(tst->trans, "Memory allocation fail\n");
		iwl_test_trace_stop(tst);
		return -ENOMEM;
	}

	if (nla_put(skb, IWL_TM_ATTR_TRACE_ADDR,
		    sizeof(tst->trace.dma_addr),
		    (u64 *)&tst->trace.dma_addr))
		goto nla_put_failure;

	status = iwl_test_reply(tst, skb);
	if (status < 0)
		IWL_ERR(tst->trans, "Error sending msg : %d\n", status);

	tst->trace.nchunks = DIV_ROUND_UP(tst->trace.size,
					  DUMP_CHUNK_SIZE);

	return status;

nla_put_failure:
	kfree_skb(skb);
	if (nla_get_u32(tb[IWL_TM_ATTR_COMMAND]) ==
	    IWL_TM_CMD_APP2DEV_BEGIN_TRACE)
		iwl_test_trace_stop(tst);
	return -EMSGSIZE;
}

/*
 * Handles indirect read from the periphery or the SRAM. The read is performed
 * to a temporary buffer. The user space application should later issue a dump
 */
static int iwl_test_indirect_read(struct iwl_test *tst, u32 addr, u32 size)
{
	struct iwl_trans *trans = tst->trans;
	unsigned long flags;
	int i;

	if (size & 0x3)
		return -EINVAL;

	tst->mem.size = size;
	tst->mem.addr = kmalloc(tst->mem.size, GFP_KERNEL);
	if (tst->mem.addr == NULL)
		return -ENOMEM;

	/* Hard-coded periphery absolute address */
	if (IWL_ABS_PRPH_START <= addr &&
	    addr < IWL_ABS_PRPH_START + PRPH_END) {
			if (!iwl_trans_grab_nic_access(trans, false, &flags)) {
				return -EIO;
			}
			iwl_write32(trans, HBUS_TARG_PRPH_RADDR,
				    addr | (3 << 24));
			for (i = 0; i < size; i += 4)
				*(u32 *)(tst->mem.addr + i) =
					iwl_read32(trans, HBUS_TARG_PRPH_RDAT);
			iwl_trans_release_nic_access(trans, &flags);
	} else { /* target memory (SRAM) */
		iwl_trans_read_mem(trans, addr, tst->mem.addr,
				   tst->mem.size / 4);
	}

	tst->mem.nchunks =
		DIV_ROUND_UP(tst->mem.size, DUMP_CHUNK_SIZE);
	tst->mem.in_read = true;
	return 0;

}

/*
 * Handles indirect write to the periphery or SRAM. The  is performed to a
 * temporary buffer.
 */
static int iwl_test_indirect_write(struct iwl_test *tst, u32 addr,
	u32 size, unsigned char *buf)
{
	struct iwl_trans *trans = tst->trans;
	u32 val, i;
	unsigned long flags;

	if (IWL_ABS_PRPH_START <= addr &&
	    addr < IWL_ABS_PRPH_START + PRPH_END) {
		/* Periphery writes can be 1-3 bytes long, or DWORDs */
		if (size < 4) {
			memcpy(&val, buf, size);
			if (!iwl_trans_grab_nic_access(trans, false, &flags))
					return -EIO;
			iwl_write32(trans, HBUS_TARG_PRPH_WADDR,
				    (addr & 0x0000FFFF) |
				    ((size - 1) << 24));
			iwl_write32(trans, HBUS_TARG_PRPH_WDAT, val);
			iwl_trans_release_nic_access(trans, &flags);
		} else {
			if (size % 4)
				return -EINVAL;
			for (i = 0; i < size; i += 4)
				iwl_write_prph(trans, addr+i,
					       *(u32 *)(buf+i));
		}
	} else if (iwl_test_valid_hw_addr(tst, addr)) {
		iwl_trans_write_mem(trans, addr, buf, size / 4);
	} else {
		return -EINVAL;
	}
	return 0;
}

/*
 * Handles the user application commands for indirect read/write
 * to/from the periphery or the SRAM.
 */
static int iwl_test_indirect_mem(struct iwl_test *tst, struct nlattr **tb)
{
	u32 addr, size, cmd;
	unsigned char *buf;

	/* Both read and write should be blocked, for atomicity */
	if (tst->mem.in_read)
		return -EBUSY;

	cmd = nla_get_u32(tb[IWL_TM_ATTR_COMMAND]);
	if (!tb[IWL_TM_ATTR_MEM_ADDR]) {
		IWL_ERR(tst->trans, "Error finding memory offset address\n");
		return -ENOMSG;
	}
	addr = nla_get_u32(tb[IWL_TM_ATTR_MEM_ADDR]);
	if (!tb[IWL_TM_ATTR_BUFFER_SIZE]) {
		IWL_ERR(tst->trans, "Error finding size for memory reading\n");
		return -ENOMSG;
	}
	size = nla_get_u32(tb[IWL_TM_ATTR_BUFFER_SIZE]);

	if (cmd == IWL_TM_CMD_APP2DEV_INDIRECT_BUFFER_READ) {
		return iwl_test_indirect_read(tst, addr,  size);
	} else {
		if (!tb[IWL_TM_ATTR_BUFFER_DUMP])
			return -EINVAL;
		buf = (unsigned char *)nla_data(tb[IWL_TM_ATTR_BUFFER_DUMP]);
		return iwl_test_indirect_write(tst, addr, size, buf);
	}
}

/*
 * Enable notifications to user space
 */
static int iwl_test_notifications(struct iwl_test *tst,
				  struct nlattr **tb)
{
	tst->notify = nla_get_flag(tb[IWL_TM_ATTR_ENABLE_NOTIFICATION]);
	return 0;
}

/*
 * Handles the request to get the device id
 */
static int iwl_test_get_dev_id(struct iwl_test *tst, struct nlattr **tb)
{
	u32 devid = tst->trans->hw_id;
	struct sk_buff *skb;
	int status;

	IWL_DEBUG_INFO(tst->trans, "hw version: 0x%x\n", devid);

	skb = iwl_test_alloc_reply(tst, 20);
	if (!skb) {
		IWL_ERR(tst->trans, "Memory allocation fail\n");
		return -ENOMEM;
	}

	if (nla_put_u32(skb, IWL_TM_ATTR_DEVICE_ID, devid))
		goto nla_put_failure;
	status = iwl_test_reply(tst, skb);
	if (status < 0)
		IWL_ERR(tst->trans, "Error sending msg : %d\n", status);

	return 0;

nla_put_failure:
	kfree_skb(skb);
	return -EMSGSIZE;
}

/*
 * Handles the request to get the FW version
 */
static int iwl_test_get_fw_ver(struct iwl_test *tst, struct nlattr **tb)
{
	struct sk_buff *skb;
	int status;
	u32 ver = iwl_test_fw_ver(tst);

	IWL_DEBUG_INFO(tst->trans, "uCode version raw: 0x%x\n", ver);

	skb = iwl_test_alloc_reply(tst, 20);
	if (!skb) {
		IWL_ERR(tst->trans, "Memory allocation fail\n");
		return -ENOMEM;
	}

	if (nla_put_u32(skb, IWL_TM_ATTR_FW_VERSION, ver))
		goto nla_put_failure;

	status = iwl_test_reply(tst, skb);
	if (status < 0)
		IWL_ERR(tst->trans, "Error sending msg : %d\n", status);

	return 0;

nla_put_failure:
	kfree_skb(skb);
	return -EMSGSIZE;
}

/*
 * Parse the netlink message and validate that the IWL_TM_ATTR_CMD exists
 */
int iwl_test_parse(struct iwl_test *tst, struct nlattr **tb,
		   void *data, int len)
{
	int result;

	result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
			iwl_testmode_gnl_msg_policy);
	if (result) {
		IWL_ERR(tst->trans, "Fail parse gnl msg: %d\n", result);
		return result;
	}

	/* IWL_TM_ATTR_COMMAND is absolutely mandatory */
	if (!tb[IWL_TM_ATTR_COMMAND]) {
		IWL_ERR(tst->trans, "Missing testmode command type\n");
		return -ENOMSG;
	}
	return 0;
}
IWL_EXPORT_SYMBOL(iwl_test_parse);

/*
 * Handle test commands.
 * Returns 1 for unknown commands (not handled by the test object); negative
 * value in case of error.
 */
int iwl_test_handle_cmd(struct iwl_test *tst, struct nlattr **tb)
{
	int result;

	switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
	case IWL_TM_CMD_APP2DEV_UCODE:
		IWL_DEBUG_INFO(tst->trans, "test cmd to uCode\n");
		result = iwl_test_fw_cmd(tst, tb);
		break;

	case IWL_TM_CMD_APP2DEV_DIRECT_REG_READ32:
	case IWL_TM_CMD_APP2DEV_DIRECT_REG_WRITE32:
	case IWL_TM_CMD_APP2DEV_DIRECT_REG_WRITE8:
		IWL_DEBUG_INFO(tst->trans, "test cmd to register\n");
		result = iwl_test_reg(tst, tb);
		break;

	case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
		IWL_DEBUG_INFO(tst->trans, "test uCode trace cmd to driver\n");
		result = iwl_test_trace_begin(tst, tb);
		break;

	case IWL_TM_CMD_APP2DEV_END_TRACE:
		iwl_test_trace_stop(tst);
		result = 0;
		break;

	case IWL_TM_CMD_APP2DEV_INDIRECT_BUFFER_READ:
	case IWL_TM_CMD_APP2DEV_INDIRECT_BUFFER_WRITE:
		IWL_DEBUG_INFO(tst->trans, "test indirect memory cmd\n");
		result = iwl_test_indirect_mem(tst, tb);
		break;

	case IWL_TM_CMD_APP2DEV_NOTIFICATIONS:
		IWL_DEBUG_INFO(tst->trans, "test notifications cmd\n");
		result = iwl_test_notifications(tst, tb);
		break;

	case IWL_TM_CMD_APP2DEV_GET_FW_VERSION:
		IWL_DEBUG_INFO(tst->trans, "test get FW ver cmd\n");
		result = iwl_test_get_fw_ver(tst, tb);
		break;

	case IWL_TM_CMD_APP2DEV_GET_DEVICE_ID:
		IWL_DEBUG_INFO(tst->trans, "test Get device ID cmd\n");
		result = iwl_test_get_dev_id(tst, tb);
		break;

	default:
		IWL_DEBUG_INFO(tst->trans, "Unknown test command\n");
		result = 1;
		break;
	}
	return result;
}
IWL_EXPORT_SYMBOL(iwl_test_handle_cmd);

static int iwl_test_trace_dump(struct iwl_test *tst, struct sk_buff *skb,
			       struct netlink_callback *cb)
{
	int idx, length;

	if (!tst->trace.enabled || !tst->trace.trace_addr)
		return -EFAULT;

	idx = cb->args[4];
	if (idx >= tst->trace.nchunks)
		return -ENOENT;

	length = DUMP_CHUNK_SIZE;
	if (((idx + 1) == tst->trace.nchunks) &&
	    (tst->trace.size % DUMP_CHUNK_SIZE))
		length = tst->trace.size %
			DUMP_CHUNK_SIZE;

	if (nla_put(skb, IWL_TM_ATTR_TRACE_DUMP, length,
		    tst->trace.trace_addr + (DUMP_CHUNK_SIZE * idx)))
		goto nla_put_failure;

	cb->args[4] = ++idx;
	return 0;

 nla_put_failure:
	return -ENOBUFS;
}

static int iwl_test_buffer_dump(struct iwl_test *tst, struct sk_buff *skb,
				struct netlink_callback *cb)
{
	int idx, length;

	if (!tst->mem.in_read)
		return -EFAULT;

	idx = cb->args[4];
	if (idx >= tst->mem.nchunks) {
		iwl_test_mem_stop(tst);
		return -ENOENT;
	}

	length = DUMP_CHUNK_SIZE;
	if (((idx + 1) == tst->mem.nchunks) &&
	    (tst->mem.size % DUMP_CHUNK_SIZE))
		length = tst->mem.size % DUMP_CHUNK_SIZE;

	if (nla_put(skb, IWL_TM_ATTR_BUFFER_DUMP, length,
		    tst->mem.addr + (DUMP_CHUNK_SIZE * idx)))
		goto nla_put_failure;

	cb->args[4] = ++idx;
	return 0;

 nla_put_failure:
	return -ENOBUFS;
}

/*
 * Handle dump commands.
 * Returns 1 for unknown commands (not handled by the test object); negative
 * value in case of error.
 */
int iwl_test_dump(struct iwl_test *tst, u32 cmd, struct sk_buff *skb,
		  struct netlink_callback *cb)
{
	int result;

	switch (cmd) {
	case IWL_TM_CMD_APP2DEV_READ_TRACE:
		IWL_DEBUG_INFO(tst->trans, "uCode trace cmd\n");
		result = iwl_test_trace_dump(tst, skb, cb);
		break;

	case IWL_TM_CMD_APP2DEV_INDIRECT_BUFFER_DUMP:
		IWL_DEBUG_INFO(tst->trans, "testmode sram dump cmd\n");
		result = iwl_test_buffer_dump(tst, skb, cb);
		break;

	default:
		result = 1;
		break;
	}
	return result;
}
IWL_EXPORT_SYMBOL(iwl_test_dump);

/*
 * Multicast a spontaneous messages from the device to the user space.
 */
static void iwl_test_send_rx(struct iwl_test *tst,
			     struct iwl_rx_cmd_buffer *rxb)
{
	struct sk_buff *skb;
	struct iwl_rx_packet *data;
	int length;

	data = rxb_addr(rxb);
	length = le32_to_cpu(data->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;

	/* the length doesn't include len_n_flags field, so add it manually */
	length += sizeof(__le32);

	skb = iwl_test_alloc_event(tst, length + 20);
	if (skb == NULL) {
		IWL_ERR(tst->trans, "Out of memory for message to user\n");
		return;
	}

	if (nla_put_u32(skb, IWL_TM_ATTR_COMMAND,
			IWL_TM_CMD_DEV2APP_UCODE_RX_PKT) ||
	    nla_put(skb, IWL_TM_ATTR_UCODE_RX_PKT, length, data))
		goto nla_put_failure;

	iwl_test_event(tst, skb);
	return;

nla_put_failure:
	kfree_skb(skb);
	IWL_ERR(tst->trans, "Ouch, overran buffer, check allocation!\n");
}

/*
 * Called whenever a Rx frames is recevied from the device. If notifications to
 * the user space are requested, sends the frames to the user.
 */
void iwl_test_rx(struct iwl_test *tst, struct iwl_rx_cmd_buffer *rxb)
{
	if (tst->notify)
		iwl_test_send_rx(tst, rxb);
}
IWL_EXPORT_SYMBOL(iwl_test_rx);