-
Notifications
You must be signed in to change notification settings - Fork 48
/
rsrc_nonstatic.c
1241 lines (1055 loc) · 29.7 KB
/
rsrc_nonstatic.c
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
/*
* rsrc_nonstatic.c -- Resource management routines for !SS_CAP_STATIC_MAP sockets
*
* 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.
*
* The initial developer of the original code is David A. Hinds
* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
*
* (C) 1999 David A. Hinds
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/timer.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/io.h>
#include <asm/irq.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include "cs_internal.h"
/* moved to rsrc_mgr.c
MODULE_AUTHOR("David A. Hinds, Dominik Brodowski");
MODULE_LICENSE("GPL");
*/
/* Parameters that can be set with 'insmod' */
#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
INT_MODULE_PARM(probe_mem, 1); /* memory probe? */
#ifdef CONFIG_PCMCIA_PROBE
INT_MODULE_PARM(probe_io, 1); /* IO port probe? */
INT_MODULE_PARM(mem_limit, 0x10000);
#endif
/* for io_db and mem_db */
struct resource_map {
u_long base, num;
struct resource_map *next;
};
struct socket_data {
struct resource_map mem_db;
struct resource_map mem_db_valid;
struct resource_map io_db;
};
#define MEM_PROBE_LOW (1 << 0)
#define MEM_PROBE_HIGH (1 << 1)
/*======================================================================
Linux resource management extensions
======================================================================*/
static struct resource *
claim_region(struct pcmcia_socket *s, resource_size_t base,
resource_size_t size, int type, char *name)
{
struct resource *res, *parent;
parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource;
res = pcmcia_make_resource(base, size, type | IORESOURCE_BUSY, name);
if (res) {
#ifdef CONFIG_PCI
if (s && s->cb_dev)
parent = pci_find_parent_resource(s->cb_dev, res);
#endif
if (!parent || request_resource(parent, res)) {
kfree(res);
res = NULL;
}
}
return res;
}
static void free_region(struct resource *res)
{
if (res) {
release_resource(res);
kfree(res);
}
}
/*======================================================================
These manage the internal databases of available resources.
======================================================================*/
static int add_interval(struct resource_map *map, u_long base, u_long num)
{
struct resource_map *p, *q;
for (p = map; ; p = p->next) {
if ((p != map) && (p->base+p->num >= base)) {
p->num = max(num + base - p->base, p->num);
return 0;
}
if ((p->next == map) || (p->next->base > base+num-1))
break;
}
q = kmalloc(sizeof(struct resource_map), GFP_KERNEL);
if (!q) {
printk(KERN_WARNING "out of memory to update resources\n");
return -ENOMEM;
}
q->base = base; q->num = num;
q->next = p->next; p->next = q;
return 0;
}
/*====================================================================*/
static int sub_interval(struct resource_map *map, u_long base, u_long num)
{
struct resource_map *p, *q;
for (p = map; ; p = q) {
q = p->next;
if (q == map)
break;
if ((q->base+q->num > base) && (base+num > q->base)) {
if (q->base >= base) {
if (q->base+q->num <= base+num) {
/* Delete whole block */
p->next = q->next;
kfree(q);
/* don't advance the pointer yet */
q = p;
} else {
/* Cut off bit from the front */
q->num = q->base + q->num - base - num;
q->base = base + num;
}
} else if (q->base+q->num <= base+num) {
/* Cut off bit from the end */
q->num = base - q->base;
} else {
/* Split the block into two pieces */
p = kmalloc(sizeof(struct resource_map),
GFP_KERNEL);
if (!p) {
printk(KERN_WARNING "out of memory to update resources\n");
return -ENOMEM;
}
p->base = base+num;
p->num = q->base+q->num - p->base;
q->num = base - q->base;
p->next = q->next ; q->next = p;
}
}
}
return 0;
}
/*======================================================================
These routines examine a region of IO or memory addresses to
determine what ranges might be genuinely available.
======================================================================*/
#ifdef CONFIG_PCMCIA_PROBE
static void do_io_probe(struct pcmcia_socket *s, unsigned int base,
unsigned int num)
{
struct resource *res;
struct socket_data *s_data = s->resource_data;
unsigned int i, j, bad;
int any;
u_char *b, hole, most;
dev_printk(KERN_INFO, &s->dev, "cs: IO port probe %#x-%#x:",
base, base+num-1);
/* First, what does a floating port look like? */
b = kzalloc(256, GFP_KERNEL);
if (!b) {
printk("\n");
dev_printk(KERN_ERR, &s->dev,
"do_io_probe: unable to kmalloc 256 bytes");
return;
}
for (i = base, most = 0; i < base+num; i += 8) {
res = claim_region(s, i, 8, IORESOURCE_IO, "PCMCIA ioprobe");
if (!res)
continue;
hole = inb(i);
for (j = 1; j < 8; j++)
if (inb(i+j) != hole)
break;
free_region(res);
if ((j == 8) && (++b[hole] > b[most]))
most = hole;
if (b[most] == 127)
break;
}
kfree(b);
bad = any = 0;
for (i = base; i < base+num; i += 8) {
res = claim_region(s, i, 8, IORESOURCE_IO, "PCMCIA ioprobe");
if (!res) {
if (!any)
printk(" excluding");
if (!bad)
bad = any = i;
continue;
}
for (j = 0; j < 8; j++)
if (inb(i+j) != most)
break;
free_region(res);
if (j < 8) {
if (!any)
printk(" excluding");
if (!bad)
bad = any = i;
} else {
if (bad) {
sub_interval(&s_data->io_db, bad, i-bad);
printk(" %#x-%#x", bad, i-1);
bad = 0;
}
}
}
if (bad) {
if ((num > 16) && (bad == base) && (i == base+num)) {
sub_interval(&s_data->io_db, bad, i-bad);
printk(" nothing: probe failed.\n");
return;
} else {
sub_interval(&s_data->io_db, bad, i-bad);
printk(" %#x-%#x", bad, i-1);
}
}
printk(any ? "\n" : " clean.\n");
}
#endif
/*======================================================================*/
/**
* readable() - iomem validation function for cards with a valid CIS
*/
static int readable(struct pcmcia_socket *s, struct resource *res,
unsigned int *count)
{
int ret = -EINVAL;
if (s->fake_cis) {
dev_dbg(&s->dev, "fake CIS is being used: can't validate mem\n");
return 0;
}
s->cis_mem.res = res;
s->cis_virt = ioremap(res->start, s->map_size);
if (s->cis_virt) {
mutex_unlock(&s->ops_mutex);
/* as we're only called from pcmcia.c, we're safe */
if (s->callback->validate)
ret = s->callback->validate(s, count);
/* invalidate mapping */
mutex_lock(&s->ops_mutex);
iounmap(s->cis_virt);
s->cis_virt = NULL;
}
s->cis_mem.res = NULL;
if ((ret) || (*count == 0))
return -EINVAL;
return 0;
}
/**
* checksum() - iomem validation function for simple memory cards
*/
static int checksum(struct pcmcia_socket *s, struct resource *res,
unsigned int *value)
{
pccard_mem_map map;
int i, a = 0, b = -1, d;
void __iomem *virt;
virt = ioremap(res->start, s->map_size);
if (virt) {
map.map = 0;
map.flags = MAP_ACTIVE;
map.speed = 0;
map.res = res;
map.card_start = 0;
s->ops->set_mem_map(s, &map);
/* Don't bother checking every word... */
for (i = 0; i < s->map_size; i += 44) {
d = readl(virt+i);
a += d;
b &= d;
}
map.flags = 0;
s->ops->set_mem_map(s, &map);
iounmap(virt);
}
if (b == -1)
return -EINVAL;
*value = a;
return 0;
}
/**
* do_validate_mem() - low level validate a memory region for PCMCIA use
* @s: PCMCIA socket to validate
* @base: start address of resource to check
* @size: size of resource to check
* @validate: validation function to use
*
* do_validate_mem() splits up the memory region which is to be checked
* into two parts. Both are passed to the @validate() function. If
* @validate() returns non-zero, or the value parameter to @validate()
* is zero, or the value parameter is different between both calls,
* the check fails, and -EINVAL is returned. Else, 0 is returned.
*/
static int do_validate_mem(struct pcmcia_socket *s,
unsigned long base, unsigned long size,
int validate (struct pcmcia_socket *s,
struct resource *res,
unsigned int *value))
{
struct socket_data *s_data = s->resource_data;
struct resource *res1, *res2;
unsigned int info1 = 1, info2 = 1;
int ret = -EINVAL;
res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe");
res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM,
"PCMCIA memprobe");
if (res1 && res2) {
ret = 0;
if (validate) {
ret = validate(s, res1, &info1);
ret += validate(s, res2, &info2);
}
}
free_region(res2);
free_region(res1);
dev_dbg(&s->dev, "cs: memory probe 0x%06lx-0x%06lx: %p %p %u %u %u",
base, base+size-1, res1, res2, ret, info1, info2);
if ((ret) || (info1 != info2) || (info1 == 0))
return -EINVAL;
if (validate && !s->fake_cis) {
/* move it to the validated data set */
add_interval(&s_data->mem_db_valid, base, size);
sub_interval(&s_data->mem_db, base, size);
}
return 0;
}
/**
* do_mem_probe() - validate a memory region for PCMCIA use
* @s: PCMCIA socket to validate
* @base: start address of resource to check
* @num: size of resource to check
* @validate: validation function to use
* @fallback: validation function to use if validate fails
*
* do_mem_probe() checks a memory region for use by the PCMCIA subsystem.
* To do so, the area is split up into sensible parts, and then passed
* into the @validate() function. Only if @validate() and @fallback() fail,
* the area is marked as unavaibale for use by the PCMCIA subsystem. The
* function returns the size of the usable memory area.
*/
static int do_mem_probe(struct pcmcia_socket *s, u_long base, u_long num,
int validate (struct pcmcia_socket *s,
struct resource *res,
unsigned int *value),
int fallback (struct pcmcia_socket *s,
struct resource *res,
unsigned int *value))
{
struct socket_data *s_data = s->resource_data;
u_long i, j, bad, fail, step;
dev_printk(KERN_INFO, &s->dev, "cs: memory probe 0x%06lx-0x%06lx:",
base, base+num-1);
bad = fail = 0;
step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff);
/* don't allow too large steps */
if (step > 0x800000)
step = 0x800000;
/* cis_readable wants to map 2x map_size */
if (step < 2 * s->map_size)
step = 2 * s->map_size;
for (i = j = base; i < base+num; i = j + step) {
if (!fail) {
for (j = i; j < base+num; j += step) {
if (!do_validate_mem(s, j, step, validate))
break;
}
fail = ((i == base) && (j == base+num));
}
if ((fail) && (fallback)) {
for (j = i; j < base+num; j += step)
if (!do_validate_mem(s, j, step, fallback))
break;
}
if (i != j) {
if (!bad)
printk(" excluding");
printk(" %#05lx-%#05lx", i, j-1);
sub_interval(&s_data->mem_db, i, j-i);
bad += j-i;
}
}
printk(bad ? "\n" : " clean.\n");
return num - bad;
}
#ifdef CONFIG_PCMCIA_PROBE
/**
* inv_probe() - top-to-bottom search for one usuable high memory area
* @s: PCMCIA socket to validate
* @m: resource_map to check
*/
static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s)
{
struct socket_data *s_data = s->resource_data;
u_long ok;
if (m == &s_data->mem_db)
return 0;
ok = inv_probe(m->next, s);
if (ok) {
if (m->base >= 0x100000)
sub_interval(&s_data->mem_db, m->base, m->num);
return ok;
}
if (m->base < 0x100000)
return 0;
return do_mem_probe(s, m->base, m->num, readable, checksum);
}
/**
* validate_mem() - memory probe function
* @s: PCMCIA socket to validate
* @probe_mask: MEM_PROBE_LOW | MEM_PROBE_HIGH
*
* The memory probe. If the memory list includes a 64K-aligned block
* below 1MB, we probe in 64K chunks, and as soon as we accumulate at
* least mem_limit free space, we quit. Returns 0 on usuable ports.
*/
static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
{
struct resource_map *m, mm;
static unsigned char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 };
unsigned long b, i, ok = 0;
struct socket_data *s_data = s->resource_data;
/* We do up to four passes through the list */
if (probe_mask & MEM_PROBE_HIGH) {
if (inv_probe(s_data->mem_db.next, s) > 0)
return 0;
if (s_data->mem_db_valid.next != &s_data->mem_db_valid)
return 0;
dev_printk(KERN_NOTICE, &s->dev,
"cs: warning: no high memory space available!\n");
return -ENODEV;
}
for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
mm = *m;
/* Only probe < 1 MB */
if (mm.base >= 0x100000)
continue;
if ((mm.base | mm.num) & 0xffff) {
ok += do_mem_probe(s, mm.base, mm.num, readable,
checksum);
continue;
}
/* Special probe for 64K-aligned block */
for (i = 0; i < 4; i++) {
b = order[i] << 12;
if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) {
if (ok >= mem_limit)
sub_interval(&s_data->mem_db, b, 0x10000);
else
ok += do_mem_probe(s, b, 0x10000,
readable, checksum);
}
}
}
if (ok > 0)
return 0;
return -ENODEV;
}
#else /* CONFIG_PCMCIA_PROBE */
/**
* validate_mem() - memory probe function
* @s: PCMCIA socket to validate
* @probe_mask: ignored
*
* Returns 0 on usuable ports.
*/
static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
{
struct resource_map *m, mm;
struct socket_data *s_data = s->resource_data;
unsigned long ok = 0;
for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
mm = *m;
ok += do_mem_probe(s, mm.base, mm.num, readable, checksum);
}
if (ok > 0)
return 0;
return -ENODEV;
}
#endif /* CONFIG_PCMCIA_PROBE */
/**
* pcmcia_nonstatic_validate_mem() - try to validate iomem for PCMCIA use
* @s: PCMCIA socket to validate
*
* This is tricky... when we set up CIS memory, we try to validate
* the memory window space allocations.
*
* Locking note: Must be called with skt_mutex held!
*/
static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s)
{
struct socket_data *s_data = s->resource_data;
unsigned int probe_mask = MEM_PROBE_LOW;
int ret;
if (!probe_mem || !(s->state & SOCKET_PRESENT))
return 0;
if (s->features & SS_CAP_PAGE_REGS)
probe_mask = MEM_PROBE_HIGH;
ret = validate_mem(s, probe_mask);
if (s_data->mem_db_valid.next != &s_data->mem_db_valid)
return 0;
return ret;
}
struct pcmcia_align_data {
unsigned long mask;
unsigned long offset;
struct resource_map *map;
};
static resource_size_t pcmcia_common_align(struct pcmcia_align_data *align_data,
resource_size_t start)
{
resource_size_t ret;
/*
* Ensure that we have the correct start address
*/
ret = (start & ~align_data->mask) + align_data->offset;
if (ret < start)
ret += align_data->mask + 1;
return ret;
}
static resource_size_t
pcmcia_align(void *align_data, const struct resource *res,
resource_size_t size, resource_size_t align)
{
struct pcmcia_align_data *data = align_data;
struct resource_map *m;
resource_size_t start;
start = pcmcia_common_align(data, res->start);
for (m = data->map->next; m != data->map; m = m->next) {
unsigned long map_start = m->base;
unsigned long map_end = m->base + m->num - 1;
/*
* If the lower resources are not available, try aligning
* to this entry of the resource database to see if it'll
* fit here.
*/
if (start < map_start)
start = pcmcia_common_align(data, map_start);
/*
* If we're above the area which was passed in, there's
* no point proceeding.
*/
if (start >= res->end)
break;
if ((start + size - 1) <= map_end)
break;
}
/*
* If we failed to find something suitable, ensure we fail.
*/
if (m == data->map)
start = res->end;
return start;
}
/*
* Adjust an existing IO region allocation, but making sure that we don't
* encroach outside the resources which the user supplied.
*/
static int __nonstatic_adjust_io_region(struct pcmcia_socket *s,
unsigned long r_start,
unsigned long r_end)
{
struct resource_map *m;
struct socket_data *s_data = s->resource_data;
int ret = -ENOMEM;
for (m = s_data->io_db.next; m != &s_data->io_db; m = m->next) {
unsigned long start = m->base;
unsigned long end = m->base + m->num - 1;
if (start > r_start || r_end > end)
continue;
ret = 0;
}
return ret;
}
/*======================================================================
These find ranges of I/O ports or memory addresses that are not
currently allocated by other devices.
The 'align' field should reflect the number of bits of address
that need to be preserved from the initial value of *base. It
should be a power of two, greater than or equal to 'num'. A value
of 0 means that all bits of *base are significant. *base should
also be strictly less than 'align'.
======================================================================*/
static struct resource *__nonstatic_find_io_region(struct pcmcia_socket *s,
unsigned long base, int num,
unsigned long align)
{
struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,
dev_name(&s->dev));
struct socket_data *s_data = s->resource_data;
struct pcmcia_align_data data;
unsigned long min = base;
int ret;
data.mask = align - 1;
data.offset = base & data.mask;
data.map = &s_data->io_db;
#ifdef CONFIG_PCI
if (s->cb_dev) {
ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
min, 0, pcmcia_align, &data);
} else
#endif
ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
1, pcmcia_align, &data);
if (ret != 0) {
kfree(res);
res = NULL;
}
return res;
}
static int nonstatic_find_io(struct pcmcia_socket *s, unsigned int attr,
unsigned int *base, unsigned int num,
unsigned int align)
{
int i, ret = 0;
/* Check for an already-allocated window that must conflict with
* what was asked for. It is a hack because it does not catch all
* potential conflicts, just the most obvious ones.
*/
for (i = 0; i < MAX_IO_WIN; i++) {
if (!s->io[i].res)
continue;
if (!*base)
continue;
if ((s->io[i].res->start & (align-1)) == *base)
return -EBUSY;
}
for (i = 0; i < MAX_IO_WIN; i++) {
struct resource *res = s->io[i].res;
unsigned int try;
if (res && (res->flags & IORESOURCE_BITS) !=
(attr & IORESOURCE_BITS))
continue;
if (!res) {
if (align == 0)
align = 0x10000;
res = s->io[i].res = __nonstatic_find_io_region(s,
*base, num,
align);
if (!res)
return -EINVAL;
*base = res->start;
s->io[i].res->flags =
((res->flags & ~IORESOURCE_BITS) |
(attr & IORESOURCE_BITS));
s->io[i].InUse = num;
return 0;
}
/* Try to extend top of window */
try = res->end + 1;
if ((*base == 0) || (*base == try)) {
ret = __nonstatic_adjust_io_region(s, res->start,
res->end + num);
if (!ret) {
ret = adjust_resource(s->io[i].res, res->start,
res->end - res->start + num + 1);
if (ret)
continue;
*base = try;
s->io[i].InUse += num;
return 0;
}
}
/* Try to extend bottom of window */
try = res->start - num;
if ((*base == 0) || (*base == try)) {
ret = __nonstatic_adjust_io_region(s,
res->start - num,
res->end);
if (!ret) {
ret = adjust_resource(s->io[i].res,
res->start - num,
res->end - res->start + num + 1);
if (ret)
continue;
*base = try;
s->io[i].InUse += num;
return 0;
}
}
}
return -EINVAL;
}
static struct resource *nonstatic_find_mem_region(u_long base, u_long num,
u_long align, int low, struct pcmcia_socket *s)
{
struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_MEM,
dev_name(&s->dev));
struct socket_data *s_data = s->resource_data;
struct pcmcia_align_data data;
unsigned long min, max;
int ret, i, j;
low = low || !(s->features & SS_CAP_PAGE_REGS);
data.mask = align - 1;
data.offset = base & data.mask;
for (i = 0; i < 2; i++) {
data.map = &s_data->mem_db_valid;
if (low) {
max = 0x100000UL;
min = base < max ? base : 0;
} else {
max = ~0UL;
min = 0x100000UL + base;
}
for (j = 0; j < 2; j++) {
#ifdef CONFIG_PCI
if (s->cb_dev) {
ret = pci_bus_alloc_resource(s->cb_dev->bus,
res, num, 1, min, 0,
pcmcia_align, &data);
} else
#endif
{
ret = allocate_resource(&iomem_resource,
res, num, min, max, 1,
pcmcia_align, &data);
}
if (ret == 0)
break;
data.map = &s_data->mem_db;
}
if (ret == 0 || low)
break;
low = 1;
}
if (ret != 0) {
kfree(res);
res = NULL;
}
return res;
}
static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
{
struct socket_data *data = s->resource_data;
unsigned long size = end - start + 1;
int ret = 0;
if (end < start)
return -EINVAL;
switch (action) {
case ADD_MANAGED_RESOURCE:
ret = add_interval(&data->mem_db, start, size);
if (!ret)
do_mem_probe(s, start, size, NULL, NULL);
break;
case REMOVE_MANAGED_RESOURCE:
ret = sub_interval(&data->mem_db, start, size);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
{
struct socket_data *data = s->resource_data;
unsigned long size;
int ret = 0;
#if defined(CONFIG_X86)
/* on x86, avoid anything < 0x100 for it is often used for
* legacy platform devices */
if (start < 0x100)
start = 0x100;
#endif
size = end - start + 1;
if (end < start)
return -EINVAL;
if (end > IO_SPACE_LIMIT)
return -EINVAL;
switch (action) {
case ADD_MANAGED_RESOURCE:
if (add_interval(&data->io_db, start, size) != 0) {
ret = -EBUSY;
break;
}
#ifdef CONFIG_PCMCIA_PROBE
if (probe_io)
do_io_probe(s, start, size);
#endif
break;
case REMOVE_MANAGED_RESOURCE:
sub_interval(&data->io_db, start, size);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
#ifdef CONFIG_PCI
static int nonstatic_autoadd_resources(struct pcmcia_socket *s)
{
struct resource *res;
int i, done = 0;
if (!s->cb_dev || !s->cb_dev->bus)
return -ENODEV;
#if defined(CONFIG_X86)
/* If this is the root bus, the risk of hitting some strange
* system devices is too high: If a driver isn't loaded, the
* resources are not claimed; even if a driver is loaded, it
* may not request all resources or even the wrong one. We
* can neither trust the rest of the kernel nor ACPI/PNP and
* CRS parsing to get it right. Therefore, use several
* safeguards:
*
* - Do not auto-add resources if the CardBus bridge is on
* the PCI root bus
*
* - Avoid any I/O ports < 0x100.
*
* - On PCI-PCI bridges, only use resources which are set up
* exclusively for the secondary PCI bus: the risk of hitting
* system devices is quite low, as they usually aren't
* connected to the secondary PCI bus.
*/
if (s->cb_dev->bus->number == 0)
return -EINVAL;
for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) {
res = s->cb_dev->bus->resource[i];
#else
pci_bus_for_each_resource(s->cb_dev->bus, res, i) {
#endif
if (!res)
continue;
if (res->flags & IORESOURCE_IO) {
/* safeguard against the root resource, where the
* risk of hitting any other device would be too
* high */
if (res == &ioport_resource)
continue;
dev_printk(KERN_INFO, &s->cb_dev->dev,
"pcmcia: parent PCI bridge window: %pR\n",
res);
if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end))
done |= IORESOURCE_IO;
}
if (res->flags & IORESOURCE_MEM) {
/* safeguard against the root resource, where the
* risk of hitting any other device would be too
* high */
if (res == &iomem_resource)
continue;
dev_printk(KERN_INFO, &s->cb_dev->dev,
"pcmcia: parent PCI bridge window: %pR\n",
res);
if (!adjust_memory(s, ADD_MANAGED_RESOURCE, res->start, res->end))
done |= IORESOURCE_MEM;
}
}
/* if we got at least one of IO, and one of MEM, we can be glad and
* activate the PCMCIA subsystem */
if (done == (IORESOURCE_MEM | IORESOURCE_IO))
s->resource_setup_done = 1;