summaryrefslogtreecommitdiff
path: root/sound/soc/intel/sst-firmware.c
blob: ef2e8b5766a1b92df8879541888b4761f1c2a09f (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
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
/*
 * Intel SST Firmware Loader
 *
 * Copyright (C) 2013, Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 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.
 *
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/firmware.h>
#include <linux/export.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/pci.h>
#include <linux/acpi.h>

/* supported DMA engine drivers */
#include <linux/platform_data/dma-dw.h>
#include <linux/dma/dw.h>

#include <asm/page.h>
#include <asm/pgtable.h>

#include "sst-dsp.h"
#include "sst-dsp-priv.h"

#define SST_DMA_RESOURCES	2
#define SST_DSP_DMA_MAX_BURST	0x3
#define SST_HSW_BLOCK_ANY	0xffffffff

#define SST_HSW_MASK_DMA_ADDR_DSP 0xfff00000

struct sst_dma {
	struct sst_dsp *sst;

	struct dw_dma_chip *chip;

	struct dma_async_tx_descriptor *desc;
	struct dma_chan *ch;
};

static inline void sst_memcpy32(volatile void __iomem *dest, void *src, u32 bytes)
{
	/* __iowrite32_copy use 32bit size values so divide by 4 */
	__iowrite32_copy((void *)dest, src, bytes/4);
}

static void sst_dma_transfer_complete(void *arg)
{
	struct sst_dsp *sst = (struct sst_dsp *)arg;

	dev_dbg(sst->dev, "DMA: callback\n");
}

static int sst_dsp_dma_copy(struct sst_dsp *sst, dma_addr_t dest_addr,
	dma_addr_t src_addr, size_t size)
{
	struct dma_async_tx_descriptor *desc;
	struct sst_dma *dma = sst->dma;

	if (dma->ch == NULL) {
		dev_err(sst->dev, "error: no DMA channel\n");
		return -ENODEV;
	}

	dev_dbg(sst->dev, "DMA: src: 0x%lx dest 0x%lx size %zu\n",
		(unsigned long)src_addr, (unsigned long)dest_addr, size);

	desc = dma->ch->device->device_prep_dma_memcpy(dma->ch, dest_addr,
		src_addr, size, DMA_CTRL_ACK);
	if (!desc){
		dev_err(sst->dev, "error: dma prep memcpy failed\n");
		return -EINVAL;
	}

	desc->callback = sst_dma_transfer_complete;
	desc->callback_param = sst;

	desc->tx_submit(desc);
	dma_wait_for_async_tx(desc);

	return 0;
}

/* copy to DSP */
int sst_dsp_dma_copyto(struct sst_dsp *sst, dma_addr_t dest_addr,
	dma_addr_t src_addr, size_t size)
{
	return sst_dsp_dma_copy(sst, dest_addr | SST_HSW_MASK_DMA_ADDR_DSP,
			src_addr, size);
}
EXPORT_SYMBOL_GPL(sst_dsp_dma_copyto);

/* copy from DSP */
int sst_dsp_dma_copyfrom(struct sst_dsp *sst, dma_addr_t dest_addr,
	dma_addr_t src_addr, size_t size)
{
	return sst_dsp_dma_copy(sst, dest_addr,
		src_addr | SST_HSW_MASK_DMA_ADDR_DSP, size);
}
EXPORT_SYMBOL_GPL(sst_dsp_dma_copyfrom);

/* remove module from memory - callers hold locks */
static void block_list_remove(struct sst_dsp *dsp,
	struct list_head *block_list)
{
	struct sst_mem_block *block, *tmp;
	int err;

	/* disable each block  */
	list_for_each_entry(block, block_list, module_list) {

		if (block->ops && block->ops->disable) {
			err = block->ops->disable(block);
			if (err < 0)
				dev_err(dsp->dev,
					"error: cant disable block %d:%d\n",
					block->type, block->index);
		}
	}

	/* mark each block as free */
	list_for_each_entry_safe(block, tmp, block_list, module_list) {
		list_del(&block->module_list);
		list_move(&block->list, &dsp->free_block_list);
		dev_dbg(dsp->dev, "block freed %d:%d at offset 0x%x\n",
			block->type, block->index, block->offset);
	}
}

/* prepare the memory block to receive data from host - callers hold locks */
static int block_list_prepare(struct sst_dsp *dsp,
	struct list_head *block_list)
{
	struct sst_mem_block *block;
	int ret = 0;

	/* enable each block so that's it'e ready for data */
	list_for_each_entry(block, block_list, module_list) {

		if (block->ops && block->ops->enable && !block->users) {
			ret = block->ops->enable(block);
			if (ret < 0) {
				dev_err(dsp->dev,
					"error: cant disable block %d:%d\n",
					block->type, block->index);
				goto err;
			}
		}
	}
	return ret;

err:
	list_for_each_entry(block, block_list, module_list) {
		if (block->ops && block->ops->disable)
			block->ops->disable(block);
	}
	return ret;
}

static struct dw_dma_platform_data dw_pdata = {
	.is_private = 1,
	.chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
	.chan_priority = CHAN_PRIORITY_ASCENDING,
};

static struct dw_dma_chip *dw_probe(struct device *dev, struct resource *mem,
	int irq)
{
	struct dw_dma_chip *chip;
	int err;

	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
	if (!chip)
		return ERR_PTR(-ENOMEM);

	chip->irq = irq;
	chip->regs = devm_ioremap_resource(dev, mem);
	if (IS_ERR(chip->regs))
		return ERR_CAST(chip->regs);

	err = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(31));
	if (err)
		return ERR_PTR(err);

	chip->dev = dev;
	err = dw_dma_probe(chip, &dw_pdata);
	if (err)
		return ERR_PTR(err);

	return chip;
}

static void dw_remove(struct dw_dma_chip *chip)
{
	dw_dma_remove(chip);
}

static bool dma_chan_filter(struct dma_chan *chan, void *param)
{
	struct sst_dsp *dsp = (struct sst_dsp *)param;

	return chan->device->dev == dsp->dma_dev;
}

int sst_dsp_dma_get_channel(struct sst_dsp *dsp, int chan_id)
{
	struct sst_dma *dma = dsp->dma;
	struct dma_slave_config slave;
	dma_cap_mask_t mask;
	int ret;

	/* The Intel MID DMA engine driver needs the slave config set but
	 * Synopsis DMA engine driver safely ignores the slave config */
	dma_cap_zero(mask);
	dma_cap_set(DMA_SLAVE, mask);
	dma_cap_set(DMA_MEMCPY, mask);

	dma->ch = dma_request_channel(mask, dma_chan_filter, dsp);
	if (dma->ch == NULL) {
		dev_err(dsp->dev, "error: DMA request channel failed\n");
		return -EIO;
	}

	memset(&slave, 0, sizeof(slave));
	slave.direction = DMA_MEM_TO_DEV;
	slave.src_addr_width =
		slave.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
	slave.src_maxburst = slave.dst_maxburst = SST_DSP_DMA_MAX_BURST;

	ret = dmaengine_slave_config(dma->ch, &slave);
	if (ret) {
		dev_err(dsp->dev, "error: unable to set DMA slave config %d\n",
			ret);
		dma_release_channel(dma->ch);
		dma->ch = NULL;
	}

	return ret;
}
EXPORT_SYMBOL_GPL(sst_dsp_dma_get_channel);

void sst_dsp_dma_put_channel(struct sst_dsp *dsp)
{
	struct sst_dma *dma = dsp->dma;

	if (!dma->ch)
		return;

	dma_release_channel(dma->ch);
	dma->ch = NULL;
}
EXPORT_SYMBOL_GPL(sst_dsp_dma_put_channel);

int sst_dma_new(struct sst_dsp *sst)
{
	struct sst_pdata *sst_pdata = sst->pdata;
	struct sst_dma *dma;
	struct resource mem;
	const char *dma_dev_name;
	int ret = 0;

	/* configure the correct platform data for whatever DMA engine
	* is attached to the ADSP IP. */
	switch (sst->pdata->dma_engine) {
	case SST_DMA_TYPE_DW:
		dma_dev_name = "dw_dmac";
		break;
	case SST_DMA_TYPE_MID:
		dma_dev_name = "Intel MID DMA";
		break;
	default:
		dev_err(sst->dev, "error: invalid DMA engine %d\n",
			sst->pdata->dma_engine);
		return -EINVAL;
	}

	dma = devm_kzalloc(sst->dev, sizeof(struct sst_dma), GFP_KERNEL);
	if (!dma)
		return -ENOMEM;

	dma->sst = sst;

	memset(&mem, 0, sizeof(mem));

	mem.start = sst->addr.lpe_base + sst_pdata->dma_base;
	mem.end   = sst->addr.lpe_base + sst_pdata->dma_base + sst_pdata->dma_size - 1;
	mem.flags = IORESOURCE_MEM;

	/* now register DMA engine device */
	dma->chip = dw_probe(sst->dma_dev, &mem, sst_pdata->irq);
	if (IS_ERR(dma->chip)) {
		dev_err(sst->dev, "error: DMA device register failed\n");
		ret = PTR_ERR(dma->chip);
		goto err_dma_dev;
	}

	sst->dma = dma;
	sst->fw_use_dma = true;
	return 0;

err_dma_dev:
	devm_kfree(sst->dev, dma);
	return ret;
}
EXPORT_SYMBOL(sst_dma_new);

void sst_dma_free(struct sst_dma *dma)
{

	if (dma == NULL)
		return;

	if (dma->ch)
		dma_release_channel(dma->ch);

	if (dma->chip)
		dw_remove(dma->chip);

}
EXPORT_SYMBOL(sst_dma_free);

/* create new generic firmware object */
struct sst_fw *sst_fw_new(struct sst_dsp *dsp, 
	const struct firmware *fw, void *private)
{
	struct sst_fw *sst_fw;
	int err;

	if (!dsp->ops->parse_fw)
		return NULL;

	sst_fw = kzalloc(sizeof(*sst_fw), GFP_KERNEL);
	if (sst_fw == NULL)
		return NULL;

	sst_fw->dsp = dsp;
	sst_fw->private = private;
	sst_fw->size = fw->size;

	/* allocate DMA buffer to store FW data */
	sst_fw->dma_buf = dma_alloc_coherent(dsp->dma_dev, sst_fw->size,
				&sst_fw->dmable_fw_paddr, GFP_DMA | GFP_KERNEL);
	if (!sst_fw->dma_buf) {
		dev_err(dsp->dev, "error: DMA alloc failed\n");
		kfree(sst_fw);
		return NULL;
	}

	/* copy FW data to DMA-able memory */
	memcpy((void *)sst_fw->dma_buf, (void *)fw->data, fw->size);

	if (dsp->fw_use_dma) {
		err = sst_dsp_dma_get_channel(dsp, 0);
		if (err < 0)
			goto chan_err;
	}

	/* call core specific FW paser to load FW data into DSP */
	err = dsp->ops->parse_fw(sst_fw);
	if (err < 0) {
		dev_err(dsp->dev, "error: parse fw failed %d\n", err);
		goto parse_err;
	}

	if (dsp->fw_use_dma)
		sst_dsp_dma_put_channel(dsp);

	mutex_lock(&dsp->mutex);
	list_add(&sst_fw->list, &dsp->fw_list);
	mutex_unlock(&dsp->mutex);

	return sst_fw;

parse_err:
	if (dsp->fw_use_dma)
		sst_dsp_dma_put_channel(dsp);
chan_err:
	dma_free_coherent(dsp->dma_dev, sst_fw->size,
				sst_fw->dma_buf,
				sst_fw->dmable_fw_paddr);
	sst_fw->dma_buf = NULL;
	kfree(sst_fw);
	return NULL;
}
EXPORT_SYMBOL_GPL(sst_fw_new);

int sst_fw_reload(struct sst_fw *sst_fw)
{
	struct sst_dsp *dsp = sst_fw->dsp;
	int ret;

	dev_dbg(dsp->dev, "reloading firmware\n");

	/* call core specific FW paser to load FW data into DSP */
	ret = dsp->ops->parse_fw(sst_fw);
	if (ret < 0)
		dev_err(dsp->dev, "error: parse fw failed %d\n", ret);

	return ret;
}
EXPORT_SYMBOL_GPL(sst_fw_reload);

void sst_fw_unload(struct sst_fw *sst_fw)
{
	struct sst_dsp *dsp = sst_fw->dsp;
	struct sst_module *module, *mtmp;
	struct sst_module_runtime *runtime, *rtmp;

	dev_dbg(dsp->dev, "unloading firmware\n");

	mutex_lock(&dsp->mutex);

	/* check module by module */
	list_for_each_entry_safe(module, mtmp, &dsp->module_list, list) {
		if (module->sst_fw == sst_fw) {

			/* remove runtime modules */
			list_for_each_entry_safe(runtime, rtmp, &module->runtime_list, list) {

				block_list_remove(dsp, &runtime->block_list);
				list_del(&runtime->list);
				kfree(runtime);
			}

			/* now remove the module */
			block_list_remove(dsp, &module->block_list);
			list_del(&module->list);
			kfree(module);
		}
	}

	/* remove all scratch blocks */
	block_list_remove(dsp, &dsp->scratch_block_list);

	mutex_unlock(&dsp->mutex);
}
EXPORT_SYMBOL_GPL(sst_fw_unload);

/* free single firmware object */
void sst_fw_free(struct sst_fw *sst_fw)
{
	struct sst_dsp *dsp = sst_fw->dsp;

	mutex_lock(&dsp->mutex);
	list_del(&sst_fw->list);
	mutex_unlock(&dsp->mutex);

	if (sst_fw->dma_buf)
		dma_free_coherent(dsp->dma_dev, sst_fw->size, sst_fw->dma_buf,
			sst_fw->dmable_fw_paddr);
	kfree(sst_fw);
}
EXPORT_SYMBOL_GPL(sst_fw_free);

/* free all firmware objects */
void sst_fw_free_all(struct sst_dsp *dsp)
{
	struct sst_fw *sst_fw, *t;

	mutex_lock(&dsp->mutex);
	list_for_each_entry_safe(sst_fw, t, &dsp->fw_list, list) {

		list_del(&sst_fw->list);
		dma_free_coherent(dsp->dev, sst_fw->size, sst_fw->dma_buf,
			sst_fw->dmable_fw_paddr);
		kfree(sst_fw);
	}
	mutex_unlock(&dsp->mutex);
}
EXPORT_SYMBOL_GPL(sst_fw_free_all);

/* create a new SST generic module from FW template */
struct sst_module *sst_module_new(struct sst_fw *sst_fw,
	struct sst_module_template *template, void *private)
{
	struct sst_dsp *dsp = sst_fw->dsp;
	struct sst_module *sst_module;

	sst_module = kzalloc(sizeof(*sst_module), GFP_KERNEL);
	if (sst_module == NULL)
		return NULL;

	sst_module->id = template->id;
	sst_module->dsp = dsp;
	sst_module->sst_fw = sst_fw;
	sst_module->scratch_size = template->scratch_size;
	sst_module->persistent_size = template->persistent_size;

	INIT_LIST_HEAD(&sst_module->block_list);
	INIT_LIST_HEAD(&sst_module->runtime_list);

	mutex_lock(&dsp->mutex);
	list_add(&sst_module->list, &dsp->module_list);
	mutex_unlock(&dsp->mutex);

	return sst_module;
}
EXPORT_SYMBOL_GPL(sst_module_new);

/* free firmware module and remove from available list */
void sst_module_free(struct sst_module *sst_module)
{
	struct sst_dsp *dsp = sst_module->dsp;

	mutex_lock(&dsp->mutex);
	list_del(&sst_module->list);
	mutex_unlock(&dsp->mutex);

	kfree(sst_module);
}
EXPORT_SYMBOL_GPL(sst_module_free);

struct sst_module_runtime *sst_module_runtime_new(struct sst_module *module,
	int id, void *private)
{
	struct sst_dsp *dsp = module->dsp;
	struct sst_module_runtime *runtime;

	runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
	if (runtime == NULL)
		return NULL;

	runtime->id = id;
	runtime->dsp = dsp;
	runtime->module = module;
	INIT_LIST_HEAD(&runtime->block_list);

	mutex_lock(&dsp->mutex);
	list_add(&runtime->list, &module->runtime_list);
	mutex_unlock(&dsp->mutex);

	return runtime;
}
EXPORT_SYMBOL_GPL(sst_module_runtime_new);

void sst_module_runtime_free(struct sst_module_runtime *runtime)
{
	struct sst_dsp *dsp = runtime->dsp;

	mutex_lock(&dsp->mutex);
	list_del(&runtime->list);
	mutex_unlock(&dsp->mutex);

	kfree(runtime);
}
EXPORT_SYMBOL_GPL(sst_module_runtime_free);

static struct sst_mem_block *find_block(struct sst_dsp *dsp,
	struct sst_block_allocator *ba)
{
	struct sst_mem_block *block;

	list_for_each_entry(block, &dsp->free_block_list, list) {
		if (block->type == ba->type && block->offset == ba->offset)
			return block;
	}

	return NULL;
}

/* Block allocator must be on block boundary */
static int block_alloc_contiguous(struct sst_dsp *dsp,
	struct sst_block_allocator *ba, struct list_head *block_list)
{
	struct list_head tmp = LIST_HEAD_INIT(tmp);
	struct sst_mem_block *block;
	u32 block_start = SST_HSW_BLOCK_ANY;
	int size = ba->size, offset = ba->offset;

	while (ba->size > 0) {

		block = find_block(dsp, ba);
		if (!block) {
			list_splice(&tmp, &dsp->free_block_list);

			ba->size = size;
			ba->offset = offset;
			return -ENOMEM;
		}

		list_move_tail(&block->list, &tmp);
		ba->offset += block->size;
		ba->size -= block->size;
	}
	ba->size = size;
	ba->offset = offset;

	list_for_each_entry(block, &tmp, list) {

		if (block->offset < block_start)
			block_start = block->offset;

		list_add(&block->module_list, block_list);

		dev_dbg(dsp->dev, "block allocated %d:%d at offset 0x%x\n",
			block->type, block->index, block->offset);
	}

	list_splice(&tmp, &dsp->used_block_list);
	return 0;
}

/* allocate first free DSP blocks for data - callers hold locks */
static int block_alloc(struct sst_dsp *dsp, struct sst_block_allocator *ba,
	struct list_head *block_list)
{
	struct sst_mem_block *block, *tmp;
	int ret = 0;

	if (ba->size == 0)
		return 0;

	/* find first free whole blocks that can hold module */
	list_for_each_entry_safe(block, tmp, &dsp->free_block_list, list) {

		/* ignore blocks with wrong type */
		if (block->type != ba->type)
			continue;

		if (ba->size > block->size)
			continue;

		ba->offset = block->offset;
		block->bytes_used = ba->size % block->size;
		list_add(&block->module_list, block_list);
		list_move(&block->list, &dsp->used_block_list);
		dev_dbg(dsp->dev, "block allocated %d:%d at offset 0x%x\n",
			block->type, block->index, block->offset);
		return 0;
	}

	/* then find free multiple blocks that can hold module */
	list_for_each_entry_safe(block, tmp, &dsp->free_block_list, list) {

		/* ignore blocks with wrong type */
		if (block->type != ba->type)
			continue;

		/* do we span > 1 blocks */
		if (ba->size > block->size) {

			/* align ba to block boundary */
			ba->offset = block->offset;

			ret = block_alloc_contiguous(dsp, ba, block_list);
			if (ret == 0)
				return ret;

		}
	}

	/* not enough free block space */
	return -ENOMEM;
}

int sst_alloc_blocks(struct sst_dsp *dsp, struct sst_block_allocator *ba,
	struct list_head *block_list)
{
	int ret;

	dev_dbg(dsp->dev, "block request 0x%x bytes at offset 0x%x type %d\n",
		ba->size, ba->offset, ba->type);

	mutex_lock(&dsp->mutex);

	ret = block_alloc(dsp, ba, block_list);
	if (ret < 0) {
		dev_err(dsp->dev, "error: can't alloc blocks %d\n", ret);
		goto out;
	}

	/* prepare DSP blocks for module usage */
	ret = block_list_prepare(dsp, block_list);
	if (ret < 0)
		dev_err(dsp->dev, "error: prepare failed\n");

out:
	mutex_unlock(&dsp->mutex);
	return ret;
}
EXPORT_SYMBOL_GPL(sst_alloc_blocks);

int sst_free_blocks(struct sst_dsp *dsp, struct list_head *block_list)
{
	mutex_lock(&dsp->mutex);
	block_list_remove(dsp, block_list);
	mutex_unlock(&dsp->mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(sst_free_blocks);

/* allocate memory blocks for static module addresses - callers hold locks */
static int block_alloc_fixed(struct sst_dsp *dsp, struct sst_block_allocator *ba,
	struct list_head *block_list)
{
	struct sst_mem_block *block, *tmp;
	u32 end = ba->offset + ba->size, block_end;
	int err;

	/* only IRAM/DRAM blocks are managed */
	if (ba->type != SST_MEM_IRAM && ba->type != SST_MEM_DRAM)
		return 0;

	/* are blocks already attached to this module */
	list_for_each_entry_safe(block, tmp, block_list, module_list) {

		/* ignore blocks with wrong type */
		if (block->type != ba->type)
			continue;

		block_end = block->offset + block->size;

		/* find block that holds section */
		if (ba->offset >= block->offset && end <= block_end)
			return 0;

		/* does block span more than 1 section */
		if (ba->offset >= block->offset && ba->offset < block_end) {

			/* align ba to block boundary */
			ba->size -= block_end - ba->offset;
			ba->offset = block_end;
			err = block_alloc_contiguous(dsp, ba, block_list);
			if (err < 0)
				return -ENOMEM;

			/* module already owns blocks */
			return 0;
		}
	}

	/* find first free blocks that can hold section in free list */
	list_for_each_entry_safe(block, tmp, &dsp->free_block_list, list) {
		block_end = block->offset + block->size;

		/* ignore blocks with wrong type */
		if (block->type != ba->type)
			continue;

		/* find block that holds section */
		if (ba->offset >= block->offset && end <= block_end) {

			/* add block */
			list_move(&block->list, &dsp->used_block_list);
			list_add(&block->module_list, block_list);
			dev_dbg(dsp->dev, "block allocated %d:%d at offset 0x%x\n",
				block->type, block->index, block->offset);
			return 0;
		}

		/* does block span more than 1 section */
		if (ba->offset >= block->offset && ba->offset < block_end) {

			/* add block */
			list_move(&block->list, &dsp->used_block_list);
			list_add(&block->module_list, block_list);
			/* align ba to block boundary */
			ba->size -= block_end - ba->offset;
			ba->offset = block_end;

			err = block_alloc_contiguous(dsp, ba, block_list);
			if (err < 0)
				return -ENOMEM;

			return 0;
		}
	}

	return -ENOMEM;
}

/* Load fixed module data into DSP memory blocks */
int sst_module_alloc_blocks(struct sst_module *module)
{
	struct sst_dsp *dsp = module->dsp;
	struct sst_fw *sst_fw = module->sst_fw;
	struct sst_block_allocator ba;
	int ret;

	ba.size = module->size;
	ba.type = module->type;
	ba.offset = module->offset;

	dev_dbg(dsp->dev, "block request 0x%x bytes at offset 0x%x type %d\n",
		ba.size, ba.offset, ba.type);

	mutex_lock(&dsp->mutex);

	/* alloc blocks that includes this section */
	ret = block_alloc_fixed(dsp, &ba, &module->block_list);
	if (ret < 0) {
		dev_err(dsp->dev,
			"error: no free blocks for section at offset 0x%x size 0x%x\n",
			module->offset, module->size);
		mutex_unlock(&dsp->mutex);
		return -ENOMEM;
	}

	/* prepare DSP blocks for module copy */
	ret = block_list_prepare(dsp, &module->block_list);
	if (ret < 0) {
		dev_err(dsp->dev, "error: fw module prepare failed\n");
		goto err;
	}

	/* copy partial module data to blocks */
	if (dsp->fw_use_dma) {
		ret = sst_dsp_dma_copyto(dsp,
			dsp->addr.lpe_base + module->offset,
			sst_fw->dmable_fw_paddr + module->data_offset,
			module->size);
		if (ret < 0) {
			dev_err(dsp->dev, "error: module copy failed\n");
			goto err;
		}
	} else
		sst_memcpy32(dsp->addr.lpe + module->offset, module->data,
			module->size);

	mutex_unlock(&dsp->mutex);
	return ret;

err:
	block_list_remove(dsp, &module->block_list);
	mutex_unlock(&dsp->mutex);
	return ret;
}
EXPORT_SYMBOL_GPL(sst_module_alloc_blocks);

/* Unload entire module from DSP memory */
int sst_module_free_blocks(struct sst_module *module)
{
	struct sst_dsp *dsp = module->dsp;

	mutex_lock(&dsp->mutex);
	block_list_remove(dsp, &module->block_list);
	mutex_unlock(&dsp->mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(sst_module_free_blocks);

int sst_module_runtime_alloc_blocks(struct sst_module_runtime *runtime,
	int offset)
{
	struct sst_dsp *dsp = runtime->dsp;
	struct sst_module *module = runtime->module;
	struct sst_block_allocator ba;
	int ret;

	if (module->persistent_size == 0)
		return 0;

	ba.size = module->persistent_size;
	ba.type = SST_MEM_DRAM;

	mutex_lock(&dsp->mutex);

	/* do we need to allocate at a fixed address ? */
	if (offset != 0) {

		ba.offset = offset;

		dev_dbg(dsp->dev, "persistent fixed block request 0x%x bytes type %d offset 0x%x\n",
			ba.size, ba.type, ba.offset);

		/* alloc blocks that includes this section */
		ret = block_alloc_fixed(dsp, &ba, &runtime->block_list);

	} else {
		dev_dbg(dsp->dev, "persistent block request 0x%x bytes type %d\n",
			ba.size, ba.type);

		/* alloc blocks that includes this section */
		ret = block_alloc(dsp, &ba, &runtime->block_list);
	}
	if (ret < 0) {
		dev_err(dsp->dev,
		"error: no free blocks for runtime module size 0x%x\n",
			module->persistent_size);
		mutex_unlock(&dsp->mutex);
		return -ENOMEM;
	}
	runtime->persistent_offset = ba.offset;

	/* prepare DSP blocks for module copy */
	ret = block_list_prepare(dsp, &runtime->block_list);
	if (ret < 0) {
		dev_err(dsp->dev, "error: runtime block prepare failed\n");
		goto err;
	}

	mutex_unlock(&dsp->mutex);
	return ret;

err:
	block_list_remove(dsp, &module->block_list);
	mutex_unlock(&dsp->mutex);
	return ret;
}
EXPORT_SYMBOL_GPL(sst_module_runtime_alloc_blocks);

int sst_module_runtime_free_blocks(struct sst_module_runtime *runtime)
{
	struct sst_dsp *dsp = runtime->dsp;

	mutex_lock(&dsp->mutex);
	block_list_remove(dsp, &runtime->block_list);
	mutex_unlock(&dsp->mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(sst_module_runtime_free_blocks);

int sst_module_runtime_save(struct sst_module_runtime *runtime,
	struct sst_module_runtime_context *context)
{
	struct sst_dsp *dsp = runtime->dsp;
	struct sst_module *module = runtime->module;
	int ret = 0;

	dev_dbg(dsp->dev, "saving runtime %d memory at 0x%x size 0x%x\n",
		runtime->id, runtime->persistent_offset,
		module->persistent_size);

	context->buffer = dma_alloc_coherent(dsp->dma_dev,
		module->persistent_size,
		&context->dma_buffer, GFP_DMA | GFP_KERNEL);
	if (!context->buffer) {
		dev_err(dsp->dev, "error: DMA context alloc failed\n");
		return -ENOMEM;
	}

	mutex_lock(&dsp->mutex);

	if (dsp->fw_use_dma) {

		ret = sst_dsp_dma_get_channel(dsp, 0);
		if (ret < 0)
			goto err;

		ret = sst_dsp_dma_copyfrom(dsp, context->dma_buffer,
			dsp->addr.lpe_base + runtime->persistent_offset,
			module->persistent_size);
		sst_dsp_dma_put_channel(dsp);
		if (ret < 0) {
			dev_err(dsp->dev, "error: context copy failed\n");
			goto err;
		}
	} else
		sst_memcpy32(context->buffer, dsp->addr.lpe +
			runtime->persistent_offset,
			module->persistent_size);

err:
	mutex_unlock(&dsp->mutex);
	return ret;
}
EXPORT_SYMBOL_GPL(sst_module_runtime_save);

int sst_module_runtime_restore(struct sst_module_runtime *runtime,
	struct sst_module_runtime_context *context)
{
	struct sst_dsp *dsp = runtime->dsp;
	struct sst_module *module = runtime->module;
	int ret = 0;

	dev_dbg(dsp->dev, "restoring runtime %d memory at 0x%x size 0x%x\n",
		runtime->id, runtime->persistent_offset,
		module->persistent_size);

	mutex_lock(&dsp->mutex);

	if (!context->buffer) {
		dev_info(dsp->dev, "no context buffer need to restore!\n");
		goto err;
	}

	if (dsp->fw_use_dma) {

		ret = sst_dsp_dma_get_channel(dsp, 0);
		if (ret < 0)
			goto err;

		ret = sst_dsp_dma_copyto(dsp,
			dsp->addr.lpe_base + runtime->persistent_offset,
			context->dma_buffer, module->persistent_size);
		sst_dsp_dma_put_channel(dsp);
		if (ret < 0) {
			dev_err(dsp->dev, "error: module copy failed\n");
			goto err;
		}
	} else
		sst_memcpy32(dsp->addr.lpe + runtime->persistent_offset,
			context->buffer, module->persistent_size);

	dma_free_coherent(dsp->dma_dev, module->persistent_size,
				context->buffer, context->dma_buffer);
	context->buffer = NULL;

err:
	mutex_unlock(&dsp->mutex);
	return ret;
}
EXPORT_SYMBOL_GPL(sst_module_runtime_restore);

/* register a DSP memory block for use with FW based modules */
struct sst_mem_block *sst_mem_block_register(struct sst_dsp *dsp, u32 offset,
	u32 size, enum sst_mem_type type, struct sst_block_ops *ops, u32 index,
	void *private)
{
	struct sst_mem_block *block;

	block = kzalloc(sizeof(*block), GFP_KERNEL);
	if (block == NULL)
		return NULL;

	block->offset = offset;
	block->size = size;
	block->index = index;
	block->type = type;
	block->dsp = dsp;
	block->private = private;
	block->ops = ops;

	mutex_lock(&dsp->mutex);
	list_add(&block->list, &dsp->free_block_list);
	mutex_unlock(&dsp->mutex);

	return block;
}
EXPORT_SYMBOL_GPL(sst_mem_block_register);

/* unregister all DSP memory blocks */
void sst_mem_block_unregister_all(struct sst_dsp *dsp)
{
	struct sst_mem_block *block, *tmp;

	mutex_lock(&dsp->mutex);

	/* unregister used blocks */
	list_for_each_entry_safe(block, tmp, &dsp->used_block_list, list) {
		list_del(&block->list);
		kfree(block);
	}

	/* unregister free blocks */
	list_for_each_entry_safe(block, tmp, &dsp->free_block_list, list) {
		list_del(&block->list);
		kfree(block);
	}

	mutex_unlock(&dsp->mutex);
}
EXPORT_SYMBOL_GPL(sst_mem_block_unregister_all);

/* allocate scratch buffer blocks */
int sst_block_alloc_scratch(struct sst_dsp *dsp)
{
	struct sst_module *module;
	struct sst_block_allocator ba;
	int ret;

	mutex_lock(&dsp->mutex);

	/* calculate required scratch size */
	dsp->scratch_size = 0;
	list_for_each_entry(module, &dsp->module_list, list) {
		dev_dbg(dsp->dev, "module %d scratch req 0x%x bytes\n",
			module->id, module->scratch_size);
		if (dsp->scratch_size < module->scratch_size)
			dsp->scratch_size = module->scratch_size;
	}

	dev_dbg(dsp->dev, "scratch buffer required is 0x%x bytes\n",
		dsp->scratch_size);

	if (dsp->scratch_size == 0) {
		dev_info(dsp->dev, "no modules need scratch buffer\n");
		mutex_unlock(&dsp->mutex);
		return 0;
	}

	/* allocate blocks for module scratch buffers */
	dev_dbg(dsp->dev, "allocating scratch blocks\n");

	ba.size = dsp->scratch_size;
	ba.type = SST_MEM_DRAM;

	/* do we need to allocate at fixed offset */
	if (dsp->scratch_offset != 0) {

		dev_dbg(dsp->dev, "block request 0x%x bytes type %d at 0x%x\n",
			ba.size, ba.type, ba.offset);

		ba.offset = dsp->scratch_offset;

		/* alloc blocks that includes this section */
		ret = block_alloc_fixed(dsp, &ba, &dsp->scratch_block_list);

	} else {
		dev_dbg(dsp->dev, "block request 0x%x bytes type %d\n",
			ba.size, ba.type);

		ba.offset = 0;
		ret = block_alloc(dsp, &ba, &dsp->scratch_block_list);
	}
	if (ret < 0) {
		dev_err(dsp->dev, "error: can't alloc scratch blocks\n");
		mutex_unlock(&dsp->mutex);
		return ret;
	}

	ret = block_list_prepare(dsp, &dsp->scratch_block_list);
	if (ret < 0) {
		dev_err(dsp->dev, "error: scratch block prepare failed\n");
		mutex_unlock(&dsp->mutex);
		return ret;
	}

	/* assign the same offset of scratch to each module */
	dsp->scratch_offset = ba.offset;
	mutex_unlock(&dsp->mutex);
	return dsp->scratch_size;
}
EXPORT_SYMBOL_GPL(sst_block_alloc_scratch);

/* free all scratch blocks */
void sst_block_free_scratch(struct sst_dsp *dsp)
{
	mutex_lock(&dsp->mutex);
	block_list_remove(dsp, &dsp->scratch_block_list);
	mutex_unlock(&dsp->mutex);
}
EXPORT_SYMBOL_GPL(sst_block_free_scratch);

/* get a module from it's unique ID */
struct sst_module *sst_module_get_from_id(struct sst_dsp *dsp, u32 id)
{
	struct sst_module *module;

	mutex_lock(&dsp->mutex);

	list_for_each_entry(module, &dsp->module_list, list) {
		if (module->id == id) {
			mutex_unlock(&dsp->mutex);
			return module;
		}
	}

	mutex_unlock(&dsp->mutex);
	return NULL;
}
EXPORT_SYMBOL_GPL(sst_module_get_from_id);

struct sst_module_runtime *sst_module_runtime_get_from_id(
	struct sst_module *module, u32 id)
{
	struct sst_module_runtime *runtime;
	struct sst_dsp *dsp = module->dsp;

	mutex_lock(&dsp->mutex);

	list_for_each_entry(runtime, &module->runtime_list, list) {
		if (runtime->id == id) {
			mutex_unlock(&dsp->mutex);
			return runtime;
		}
	}

	mutex_unlock(&dsp->mutex);
	return NULL;
}
EXPORT_SYMBOL_GPL(sst_module_runtime_get_from_id);

/* returns block address in DSP address space */
u32 sst_dsp_get_offset(struct sst_dsp *dsp, u32 offset,
	enum sst_mem_type type)
{
	switch (type) {
	case SST_MEM_IRAM:
		return offset - dsp->addr.iram_offset +
			dsp->addr.dsp_iram_offset;
	case SST_MEM_DRAM:
		return offset - dsp->addr.dram_offset +
			dsp->addr.dsp_dram_offset;
	default:
		return 0;
	}
}
EXPORT_SYMBOL_GPL(sst_dsp_get_offset);