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[PATCH] dquot: add proper locking when using current->signal->tty
[usb.git] / drivers / pcmcia / rsrc_nonstatic.c
blobc3176b16b7bea5223aba2031251196cd88440533
1 /*
2 * rsrc_nonstatic.c -- Resource management routines for !SS_CAP_STATIC_MAP sockets
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 */
14
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/init.h>
18 #include <linux/interrupt.h>
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/types.h>
22 #include <linux/slab.h>
23 #include <linux/ioport.h>
24 #include <linux/timer.h>
25 #include <linux/pci.h>
26 #include <linux/device.h>
27
28 #include <asm/irq.h>
29 #include <asm/io.h>
30
31 #include <pcmcia/cs_types.h>
32 #include <pcmcia/ss.h>
33 #include <pcmcia/cs.h>
34 #include <pcmcia/bulkmem.h>
35 #include <pcmcia/cistpl.h>
36 #include "cs_internal.h"
37
38 MODULE_AUTHOR("David A. Hinds, Dominik Brodowski");
39 MODULE_LICENSE("GPL");
40
41 /* Parameters that can be set with 'insmod' */
42
43 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
44
45 INT_MODULE_PARM(probe_mem, 1); /* memory probe? */
46 #ifdef CONFIG_PCMCIA_PROBE
47 INT_MODULE_PARM(probe_io, 1); /* IO port probe? */
48 INT_MODULE_PARM(mem_limit, 0x10000);
49 #endif
50
51 /* for io_db and mem_db */
52 struct resource_map {
53 u_long base, num;
54 struct resource_map *next;
55 };
56
57 struct socket_data {
58 struct resource_map mem_db;
59 struct resource_map io_db;
60 unsigned int rsrc_mem_probe;
61 };
62
63 static DEFINE_MUTEX(rsrc_mutex);
64 #define MEM_PROBE_LOW (1 << 0)
65 #define MEM_PROBE_HIGH (1 << 1)
66
67
68 /*======================================================================
69
70 Linux resource management extensions
71
72 ======================================================================*/
73
74 static struct resource *
75 make_resource(resource_size_t b, resource_size_t n, int flags, char *name)
76 {
77 struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
78
79 if (res) {
80 res->name = name;
81 res->start = b;
82 res->end = b + n - 1;
83 res->flags = flags;
84 }
85 return res;
86 }
87
88 static struct resource *
89 claim_region(struct pcmcia_socket *s, resource_size_t base,
90 resource_size_t size, int type, char *name)
91 {
92 struct resource *res, *parent;
93
94 parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource;
95 res = make_resource(base, size, type | IORESOURCE_BUSY, name);
96
97 if (res) {
98 #ifdef CONFIG_PCI
99 if (s && s->cb_dev)
100 parent = pci_find_parent_resource(s->cb_dev, res);
101 #endif
102 if (!parent || request_resource(parent, res)) {
103 kfree(res);
104 res = NULL;
105 }
106 }
107 return res;
108 }
109
110 static void free_region(struct resource *res)
111 {
112 if (res) {
113 release_resource(res);
114 kfree(res);
115 }
116 }
117
118 /*======================================================================
119
120 These manage the internal databases of available resources.
121
122 ======================================================================*/
123
124 static int add_interval(struct resource_map *map, u_long base, u_long num)
125 {
126 struct resource_map *p, *q;
127
128 for (p = map; ; p = p->next) {
129 if ((p != map) && (p->base+p->num-1 >= base))
130 return -1;
131 if ((p->next == map) || (p->next->base > base+num-1))
132 break;
133 }
134 q = kmalloc(sizeof(struct resource_map), GFP_KERNEL);
135 if (!q) return CS_OUT_OF_RESOURCE;
136 q->base = base; q->num = num;
137 q->next = p->next; p->next = q;
138 return CS_SUCCESS;
139 }
140
141 /*====================================================================*/
142
143 static int sub_interval(struct resource_map *map, u_long base, u_long num)
144 {
145 struct resource_map *p, *q;
146
147 for (p = map; ; p = q) {
148 q = p->next;
149 if (q == map)
150 break;
151 if ((q->base+q->num > base) && (base+num > q->base)) {
152 if (q->base >= base) {
153 if (q->base+q->num <= base+num) {
154 /* Delete whole block */
155 p->next = q->next;
156 kfree(q);
157 /* don't advance the pointer yet */
158 q = p;
159 } else {
160 /* Cut off bit from the front */
161 q->num = q->base + q->num - base - num;
162 q->base = base + num;
163 }
164 } else if (q->base+q->num <= base+num) {
165 /* Cut off bit from the end */
166 q->num = base - q->base;
167 } else {
168 /* Split the block into two pieces */
169 p = kmalloc(sizeof(struct resource_map), GFP_KERNEL);
170 if (!p) return CS_OUT_OF_RESOURCE;
171 p->base = base+num;
172 p->num = q->base+q->num - p->base;
173 q->num = base - q->base;
174 p->next = q->next ; q->next = p;
175 }
176 }
177 }
178 return CS_SUCCESS;
179 }
180
181 /*======================================================================
182
183 These routines examine a region of IO or memory addresses to
184 determine what ranges might be genuinely available.
185
186 ======================================================================*/
187
188 #ifdef CONFIG_PCMCIA_PROBE
189 static void do_io_probe(struct pcmcia_socket *s, kio_addr_t base, kio_addr_t num)
190 {
191 struct resource *res;
192 struct socket_data *s_data = s->resource_data;
193 kio_addr_t i, j, bad;
194 int any;
195 u_char *b, hole, most;
196
197 printk(KERN_INFO "cs: IO port probe %#lx-%#lx:",
198 base, base+num-1);
199
200 /* First, what does a floating port look like? */
201 b = kzalloc(256, GFP_KERNEL);
202 if (!b) {
203 printk(KERN_ERR "do_io_probe: unable to kmalloc 256 bytes");
204 return;
205 }
206 for (i = base, most = 0; i < base+num; i += 8) {
207 res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA IO probe");
208 if (!res)
209 continue;
210 hole = inb(i);
211 for (j = 1; j < 8; j++)
212 if (inb(i+j) != hole) break;
213 free_region(res);
214 if ((j == 8) && (++b[hole] > b[most]))
215 most = hole;
216 if (b[most] == 127) break;
217 }
218 kfree(b);
219
220 bad = any = 0;
221 for (i = base; i < base+num; i += 8) {
222 res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA IO probe");
223 if (!res)
224 continue;
225 for (j = 0; j < 8; j++)
226 if (inb(i+j) != most) break;
227 free_region(res);
228 if (j < 8) {
229 if (!any)
230 printk(" excluding");
231 if (!bad)
232 bad = any = i;
233 } else {
234 if (bad) {
235 sub_interval(&s_data->io_db, bad, i-bad);
236 printk(" %#lx-%#lx", bad, i-1);
237 bad = 0;
238 }
239 }
240 }
241 if (bad) {
242 if ((num > 16) && (bad == base) && (i == base+num)) {
243 printk(" nothing: probe failed.\n");
244 return;
245 } else {
246 sub_interval(&s_data->io_db, bad, i-bad);
247 printk(" %#lx-%#lx", bad, i-1);
248 }
249 }
250
251 printk(any ? "\n" : " clean.\n");
252 }
253 #endif
254
255 /*======================================================================
256
257 This is tricky... when we set up CIS memory, we try to validate
258 the memory window space allocations.
259
260 ======================================================================*/
261
262 /* Validation function for cards with a valid CIS */
263 static int readable(struct pcmcia_socket *s, struct resource *res, cisinfo_t *info)
264 {
265 int ret = -1;
266
267 s->cis_mem.res = res;
268 s->cis_virt = ioremap(res->start, s->map_size);
269 if (s->cis_virt) {
270 ret = pccard_validate_cis(s, BIND_FN_ALL, info);
271 /* invalidate mapping and CIS cache */
272 iounmap(s->cis_virt);
273 s->cis_virt = NULL;
274 destroy_cis_cache(s);
275 }
276 s->cis_mem.res = NULL;
277 if ((ret != 0) || (info->Chains == 0))
278 return 0;
279 return 1;
280 }
281
282 /* Validation function for simple memory cards */
283 static int checksum(struct pcmcia_socket *s, struct resource *res)
284 {
285 pccard_mem_map map;
286 int i, a = 0, b = -1, d;
287 void __iomem *virt;
288
289 virt = ioremap(res->start, s->map_size);
290 if (virt) {
291 map.map = 0;
292 map.flags = MAP_ACTIVE;
293 map.speed = 0;
294 map.res = res;
295 map.card_start = 0;
296 s->ops->set_mem_map(s, &map);
297
298 /* Don't bother checking every word... */
299 for (i = 0; i < s->map_size; i += 44) {
300 d = readl(virt+i);
301 a += d;
302 b &= d;
303 }
304
305 map.flags = 0;
306 s->ops->set_mem_map(s, &map);
307
308 iounmap(virt);
309 }
310
311 return (b == -1) ? -1 : (a>>1);
312 }
313
314 static int
315 cis_readable(struct pcmcia_socket *s, unsigned long base, unsigned long size)
316 {
317 struct resource *res1, *res2;
318 cisinfo_t info1, info2;
319 int ret = 0;
320
321 res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "cs memory probe");
322 res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "cs memory probe");
323
324 if (res1 && res2) {
325 ret = readable(s, res1, &info1);
326 ret += readable(s, res2, &info2);
327 }
328
329 free_region(res2);
330 free_region(res1);
331
332 return (ret == 2) && (info1.Chains == info2.Chains);
333 }
334
335 static int
336 checksum_match(struct pcmcia_socket *s, unsigned long base, unsigned long size)
337 {
338 struct resource *res1, *res2;
339 int a = -1, b = -1;
340
341 res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "cs memory probe");
342 res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "cs memory probe");
343
344 if (res1 && res2) {
345 a = checksum(s, res1);
346 b = checksum(s, res2);
347 }
348
349 free_region(res2);
350 free_region(res1);
351
352 return (a == b) && (a >= 0);
353 }
354
355 /*======================================================================
356
357 The memory probe. If the memory list includes a 64K-aligned block
358 below 1MB, we probe in 64K chunks, and as soon as we accumulate at
359 least mem_limit free space, we quit.
360
361 ======================================================================*/
362
363 static int do_mem_probe(u_long base, u_long num, struct pcmcia_socket *s)
364 {
365 struct socket_data *s_data = s->resource_data;
366 u_long i, j, bad, fail, step;
367
368 printk(KERN_INFO "cs: memory probe 0x%06lx-0x%06lx:",
369 base, base+num-1);
370 bad = fail = 0;
371 step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff);
372 /* don't allow too large steps */
373 if (step > 0x800000)
374 step = 0x800000;
375 /* cis_readable wants to map 2x map_size */
376 if (step < 2 * s->map_size)
377 step = 2 * s->map_size;
378 for (i = j = base; i < base+num; i = j + step) {
379 if (!fail) {
380 for (j = i; j < base+num; j += step) {
381 if (cis_readable(s, j, step))
382 break;
383 }
384 fail = ((i == base) && (j == base+num));
385 }
386 if (fail) {
387 for (j = i; j < base+num; j += 2*step)
388 if (checksum_match(s, j, step) &&
389 checksum_match(s, j + step, step))
390 break;
391 }
392 if (i != j) {
393 if (!bad) printk(" excluding");
394 printk(" %#05lx-%#05lx", i, j-1);
395 sub_interval(&s_data->mem_db, i, j-i);
396 bad += j-i;
397 }
398 }
399 printk(bad ? "\n" : " clean.\n");
400 return (num - bad);
401 }
402
403 #ifdef CONFIG_PCMCIA_PROBE
404
405 static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s)
406 {
407 struct socket_data *s_data = s->resource_data;
408 u_long ok;
409 if (m == &s_data->mem_db)
410 return 0;
411 ok = inv_probe(m->next, s);
412 if (ok) {
413 if (m->base >= 0x100000)
414 sub_interval(&s_data->mem_db, m->base, m->num);
415 return ok;
416 }
417 if (m->base < 0x100000)
418 return 0;
419 return do_mem_probe(m->base, m->num, s);
420 }
421
422 static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
423 {
424 struct resource_map *m, mm;
425 static unsigned char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 };
426 unsigned long b, i, ok = 0;
427 struct socket_data *s_data = s->resource_data;
428
429 /* We do up to four passes through the list */
430 if (probe_mask & MEM_PROBE_HIGH) {
431 if (inv_probe(s_data->mem_db.next, s) > 0)
432 return 0;
433 printk(KERN_NOTICE "cs: warning: no high memory space "
434 "available!\n");
435 return -ENODEV;
436 }
437
438 for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
439 mm = *m;
440 /* Only probe < 1 MB */
441 if (mm.base >= 0x100000)
442 continue;
443 if ((mm.base | mm.num) & 0xffff) {
444 ok += do_mem_probe(mm.base, mm.num, s);
445 continue;
446 }
447 /* Special probe for 64K-aligned block */
448 for (i = 0; i < 4; i++) {
449 b = order[i] << 12;
450 if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) {
451 if (ok >= mem_limit)
452 sub_interval(&s_data->mem_db, b, 0x10000);
453 else
454 ok += do_mem_probe(b, 0x10000, s);
455 }
456 }
457 }
458
459 if (ok > 0)
460 return 0;
461
462 return -ENODEV;
463 }
464
465 #else /* CONFIG_PCMCIA_PROBE */
466
467 static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
468 {
469 struct resource_map *m, mm;
470 struct socket_data *s_data = s->resource_data;
471 unsigned long ok = 0;
472
473 for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
474 mm = *m;
475 ok += do_mem_probe(mm.base, mm.num, s);
476 }
477 if (ok > 0)
478 return 0;
479 return -ENODEV;
480 }
481
482 #endif /* CONFIG_PCMCIA_PROBE */
483
484
485 /*
486 * Locking note: Must be called with skt_mutex held!
487 */
488 static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s)
489 {
490 struct socket_data *s_data = s->resource_data;
491 unsigned int probe_mask = MEM_PROBE_LOW;
492 int ret = 0;
493
494 if (!probe_mem)
495 return 0;
496
497 mutex_lock(&rsrc_mutex);
498
499 if (s->features & SS_CAP_PAGE_REGS)
500 probe_mask = MEM_PROBE_HIGH;
501
502 if (probe_mask & ~s_data->rsrc_mem_probe) {
503 if (s->state & SOCKET_PRESENT)
504 ret = validate_mem(s, probe_mask);
505 if (!ret)
506 s_data->rsrc_mem_probe |= probe_mask;
507 }
508
509 mutex_unlock(&rsrc_mutex);
510
511 return ret;
512 }
513
514 struct pcmcia_align_data {
515 unsigned long mask;
516 unsigned long offset;
517 struct resource_map *map;
518 };
519
520 static void
521 pcmcia_common_align(void *align_data, struct resource *res,
522 resource_size_t size, resource_size_t align)
523 {
524 struct pcmcia_align_data *data = align_data;
525 resource_size_t start;
526 /*
527 * Ensure that we have the correct start address
528 */
529 start = (res->start & ~data->mask) + data->offset;
530 if (start < res->start)
531 start += data->mask + 1;
532 res->start = start;
533 }
534
535 static void
536 pcmcia_align(void *align_data, struct resource *res, resource_size_t size,
537 resource_size_t align)
538 {
539 struct pcmcia_align_data *data = align_data;
540 struct resource_map *m;
541
542 pcmcia_common_align(data, res, size, align);
543
544 for (m = data->map->next; m != data->map; m = m->next) {
545 unsigned long start = m->base;
546 unsigned long end = m->base + m->num - 1;
547
548 /*
549 * If the lower resources are not available, try aligning
550 * to this entry of the resource database to see if it'll
551 * fit here.
552 */
553 if (res->start < start) {
554 res->start = start;
555 pcmcia_common_align(data, res, size, align);
556 }
557
558 /*
559 * If we're above the area which was passed in, there's
560 * no point proceeding.
561 */
562 if (res->start >= res->end)
563 break;
564
565 if ((res->start + size - 1) <= end)
566 break;
567 }
568
569 /*
570 * If we failed to find something suitable, ensure we fail.
571 */
572 if (m == data->map)
573 res->start = res->end;
574 }
575
576 /*
577 * Adjust an existing IO region allocation, but making sure that we don't
578 * encroach outside the resources which the user supplied.
579 */
580 static int nonstatic_adjust_io_region(struct resource *res, unsigned long r_start,
581 unsigned long r_end, struct pcmcia_socket *s)
582 {
583 struct resource_map *m;
584 struct socket_data *s_data = s->resource_data;
585 int ret = -ENOMEM;
586
587 mutex_lock(&rsrc_mutex);
588 for (m = s_data->io_db.next; m != &s_data->io_db; m = m->next) {
589 unsigned long start = m->base;
590 unsigned long end = m->base + m->num - 1;
591
592 if (start > r_start || r_end > end)
593 continue;
594
595 ret = adjust_resource(res, r_start, r_end - r_start + 1);
596 break;
597 }
598 mutex_unlock(&rsrc_mutex);
599
600 return ret;
601 }
602
603 /*======================================================================
604
605 These find ranges of I/O ports or memory addresses that are not
606 currently allocated by other devices.
607
608 The 'align' field should reflect the number of bits of address
609 that need to be preserved from the initial value of *base. It
610 should be a power of two, greater than or equal to 'num'. A value
611 of 0 means that all bits of *base are significant. *base should
612 also be strictly less than 'align'.
613
614 ======================================================================*/
615
616 static struct resource *nonstatic_find_io_region(unsigned long base, int num,
617 unsigned long align, struct pcmcia_socket *s)
618 {
619 struct resource *res = make_resource(0, num, IORESOURCE_IO, s->dev.class_id);
620 struct socket_data *s_data = s->resource_data;
621 struct pcmcia_align_data data;
622 unsigned long min = base;
623 int ret;
624
625 if (align == 0)
626 align = 0x10000;
627
628 data.mask = align - 1;
629 data.offset = base & data.mask;
630 data.map = &s_data->io_db;
631
632 mutex_lock(&rsrc_mutex);
633 #ifdef CONFIG_PCI
634 if (s->cb_dev) {
635 ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
636 min, 0, pcmcia_align, &data);
637 } else
638 #endif
639 ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
640 1, pcmcia_align, &data);
641 mutex_unlock(&rsrc_mutex);
642
643 if (ret != 0) {
644 kfree(res);
645 res = NULL;
646 }
647 return res;
648 }
649
650 static struct resource * nonstatic_find_mem_region(u_long base, u_long num,
651 u_long align, int low, struct pcmcia_socket *s)
652 {
653 struct resource *res = make_resource(0, num, IORESOURCE_MEM, s->dev.class_id);
654 struct socket_data *s_data = s->resource_data;
655 struct pcmcia_align_data data;
656 unsigned long min, max;
657 int ret, i;
658
659 low = low || !(s->features & SS_CAP_PAGE_REGS);
660
661 data.mask = align - 1;
662 data.offset = base & data.mask;
663 data.map = &s_data->mem_db;
664
665 for (i = 0; i < 2; i++) {
666 if (low) {
667 max = 0x100000UL;
668 min = base < max ? base : 0;
669 } else {
670 max = ~0UL;
671 min = 0x100000UL + base;
672 }
673
674 mutex_lock(&rsrc_mutex);
675 #ifdef CONFIG_PCI
676 if (s->cb_dev) {
677 ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num,
678 1, min, 0,
679 pcmcia_align, &data);
680 } else
681 #endif
682 ret = allocate_resource(&iomem_resource, res, num, min,
683 max, 1, pcmcia_align, &data);
684 mutex_unlock(&rsrc_mutex);
685 if (ret == 0 || low)
686 break;
687 low = 1;
688 }
689
690 if (ret != 0) {
691 kfree(res);
692 res = NULL;
693 }
694 return res;
695 }
696
697
698 static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
699 {
700 struct socket_data *data = s->resource_data;
701 unsigned long size = end - start + 1;
702 int ret = 0;
703
704 if (end < start)
705 return -EINVAL;
706
707 mutex_lock(&rsrc_mutex);
708 switch (action) {
709 case ADD_MANAGED_RESOURCE:
710 ret = add_interval(&data->mem_db, start, size);
711 break;
712 case REMOVE_MANAGED_RESOURCE:
713 ret = sub_interval(&data->mem_db, start, size);
714 if (!ret) {
715 struct pcmcia_socket *socket;
716 down_read(&pcmcia_socket_list_rwsem);
717 list_for_each_entry(socket, &pcmcia_socket_list, socket_list)
718 release_cis_mem(socket);
719 up_read(&pcmcia_socket_list_rwsem);
720 }
721 break;
722 default:
723 ret = -EINVAL;
724 }
725 mutex_unlock(&rsrc_mutex);
726
727 return ret;
728 }
729
730
731 static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
732 {
733 struct socket_data *data = s->resource_data;
734 unsigned long size = end - start + 1;
735 int ret = 0;
736
737 if (end < start)
738 return -EINVAL;
739
740 if (end > IO_SPACE_LIMIT)
741 return -EINVAL;
742
743 mutex_lock(&rsrc_mutex);
744 switch (action) {
745 case ADD_MANAGED_RESOURCE:
746 if (add_interval(&data->io_db, start, size) != 0) {
747 ret = -EBUSY;
748 break;
749 }
750 #ifdef CONFIG_PCMCIA_PROBE
751 if (probe_io)
752 do_io_probe(s, start, size);
753 #endif
754 break;
755 case REMOVE_MANAGED_RESOURCE:
756 sub_interval(&data->io_db, start, size);
757 break;
758 default:
759 ret = -EINVAL;
760 break;
761 }
762 mutex_unlock(&rsrc_mutex);
763
764 return ret;
765 }
766
767
768 static int nonstatic_adjust_resource_info(struct pcmcia_socket *s, adjust_t *adj)
769 {
770 unsigned long end;
771
772 switch (adj->Resource) {
773 case RES_MEMORY_RANGE:
774 end = adj->resource.memory.Base + adj->resource.memory.Size - 1;
775 return adjust_memory(s, adj->Action, adj->resource.memory.Base, end);
776 case RES_IO_RANGE:
777 end = adj->resource.io.BasePort + adj->resource.io.NumPorts - 1;
778 return adjust_io(s, adj->Action, adj->resource.io.BasePort, end);
779 }
780 return CS_UNSUPPORTED_FUNCTION;
781 }
782
783 #ifdef CONFIG_PCI
784 static int nonstatic_autoadd_resources(struct pcmcia_socket *s)
785 {
786 struct resource *res;
787 int i, done = 0;
788
789 if (!s->cb_dev || !s->cb_dev->bus)
790 return -ENODEV;
791
792 #if defined(CONFIG_X86)
793 /* If this is the root bus, the risk of hitting
794 * some strange system devices which aren't protected
795 * by either ACPI resource tables or properly requested
796 * resources is too big. Therefore, don't do auto-adding
797 * of resources at the moment.
798 */
799 if (s->cb_dev->bus->number == 0)
800 return -EINVAL;
801 #endif
802
803 for (i=0; i < PCI_BUS_NUM_RESOURCES; i++) {
804 res = s->cb_dev->bus->resource[i];
805 if (!res)
806 continue;
807
808 if (res->flags & IORESOURCE_IO) {
809 if (res == &ioport_resource)
810 continue;
811 printk(KERN_INFO "pcmcia: parent PCI bridge I/O "
812 "window: 0x%llx - 0x%llx\n",
813 (unsigned long long)res->start,
814 (unsigned long long)res->end);
815 if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end))
816 done |= IORESOURCE_IO;
817
818 }
819
820 if (res->flags & IORESOURCE_MEM) {
821 if (res == &iomem_resource)
822 continue;
823 printk(KERN_INFO "pcmcia: parent PCI bridge Memory "
824 "window: 0x%llx - 0x%llx\n",
825 (unsigned long long)res->start,
826 (unsigned long long)res->end);
827 if (!adjust_memory(s, ADD_MANAGED_RESOURCE, res->start, res->end))
828 done |= IORESOURCE_MEM;
829 }
830 }
831
832 /* if we got at least one of IO, and one of MEM, we can be glad and
833 * activate the PCMCIA subsystem */
834 if (done == (IORESOURCE_MEM | IORESOURCE_IO))
835 s->resource_setup_done = 1;
836
837 return 0;
838 }
839
840 #else
841
842 static inline int nonstatic_autoadd_resources(struct pcmcia_socket *s)
843 {
844 return -ENODEV;
845 }
846
847 #endif
848
849
850 static int nonstatic_init(struct pcmcia_socket *s)
851 {
852 struct socket_data *data;
853
854 data = kzalloc(sizeof(struct socket_data), GFP_KERNEL);
855 if (!data)
856 return -ENOMEM;
857
858 data->mem_db.next = &data->mem_db;
859 data->io_db.next = &data->io_db;
860
861 s->resource_data = (void *) data;
862
863 nonstatic_autoadd_resources(s);
864
865 return 0;
866 }
867
868 static void nonstatic_release_resource_db(struct pcmcia_socket *s)
869 {
870 struct socket_data *data = s->resource_data;
871 struct resource_map *p, *q;
872
873 mutex_lock(&rsrc_mutex);
874 for (p = data->mem_db.next; p != &data->mem_db; p = q) {
875 q = p->next;
876 kfree(p);
877 }
878 for (p = data->io_db.next; p != &data->io_db; p = q) {
879 q = p->next;
880 kfree(p);
881 }
882 mutex_unlock(&rsrc_mutex);
883 }
884
885
886 struct pccard_resource_ops pccard_nonstatic_ops = {
887 .validate_mem = pcmcia_nonstatic_validate_mem,
888 .adjust_io_region = nonstatic_adjust_io_region,
889 .find_io = nonstatic_find_io_region,
890 .find_mem = nonstatic_find_mem_region,
891 .adjust_resource = nonstatic_adjust_resource_info,
892 .init = nonstatic_init,
893 .exit = nonstatic_release_resource_db,
894 };
895 EXPORT_SYMBOL(pccard_nonstatic_ops);
896
897
898 /* sysfs interface to the resource database */
899
900 static ssize_t show_io_db(struct class_device *class_dev, char *buf)
901 {
902 struct pcmcia_socket *s = class_get_devdata(class_dev);
903 struct socket_data *data;
904 struct resource_map *p;
905 ssize_t ret = 0;
906
907 mutex_lock(&rsrc_mutex);
908 data = s->resource_data;
909
910 for (p = data->io_db.next; p != &data->io_db; p = p->next) {
911 if (ret > (PAGE_SIZE - 10))
912 continue;
913 ret += snprintf (&buf[ret], (PAGE_SIZE - ret - 1),
914 "0x%08lx - 0x%08lx\n",
915 ((unsigned long) p->base),
916 ((unsigned long) p->base + p->num - 1));
917 }
918
919 mutex_unlock(&rsrc_mutex);
920 return (ret);
921 }
922
923 static ssize_t store_io_db(struct class_device *class_dev, const char *buf, size_t count)
924 {
925 struct pcmcia_socket *s = class_get_devdata(class_dev);
926 unsigned long start_addr, end_addr;
927 unsigned int add = ADD_MANAGED_RESOURCE;
928 ssize_t ret = 0;
929
930 ret = sscanf (buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
931 if (ret != 2) {
932 ret = sscanf (buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
933 add = REMOVE_MANAGED_RESOURCE;
934 if (ret != 2) {
935 ret = sscanf (buf, "0x%lx - 0x%lx", &start_addr, &end_addr);
936 add = ADD_MANAGED_RESOURCE;
937 if (ret != 2)
938 return -EINVAL;
939 }
940 }
941 if (end_addr < start_addr)
942 return -EINVAL;
943
944 ret = adjust_io(s, add, start_addr, end_addr);
945 if (!ret)
946 s->resource_setup_new = 1;
947
948 return ret ? ret : count;
949 }
950 static CLASS_DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db);
951
952 static ssize_t show_mem_db(struct class_device *class_dev, char *buf)
953 {
954 struct pcmcia_socket *s = class_get_devdata(class_dev);
955 struct socket_data *data;
956 struct resource_map *p;
957 ssize_t ret = 0;
958
959 mutex_lock(&rsrc_mutex);
960 data = s->resource_data;
961
962 for (p = data->mem_db.next; p != &data->mem_db; p = p->next) {
963 if (ret > (PAGE_SIZE - 10))
964 continue;
965 ret += snprintf (&buf[ret], (PAGE_SIZE - ret - 1),
966 "0x%08lx - 0x%08lx\n",
967 ((unsigned long) p->base),
968 ((unsigned long) p->base + p->num - 1));
969 }
970
971 mutex_unlock(&rsrc_mutex);
972 return (ret);
973 }
974
975 static ssize_t store_mem_db(struct class_device *class_dev, const char *buf, size_t count)
976 {
977 struct pcmcia_socket *s = class_get_devdata(class_dev);
978 unsigned long start_addr, end_addr;
979 unsigned int add = ADD_MANAGED_RESOURCE;
980 ssize_t ret = 0;
981
982 ret = sscanf (buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
983 if (ret != 2) {
984 ret = sscanf (buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
985 add = REMOVE_MANAGED_RESOURCE;
986 if (ret != 2) {
987 ret = sscanf (buf, "0x%lx - 0x%lx", &start_addr, &end_addr);
988 add = ADD_MANAGED_RESOURCE;
989 if (ret != 2)
990 return -EINVAL;
991 }
992 }
993 if (end_addr < start_addr)
994 return -EINVAL;
995
996 ret = adjust_memory(s, add, start_addr, end_addr);
997 if (!ret)
998 s->resource_setup_new = 1;
999
1000 return ret ? ret : count;
1001 }
1002 static CLASS_DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db);
1003
1004 static struct class_device_attribute *pccard_rsrc_attributes[] = {
1005 &class_device_attr_available_resources_io,
1006 &class_device_attr_available_resources_mem,
1007 NULL,
1008 };
1009
1010 static int __devinit pccard_sysfs_add_rsrc(struct class_device *class_dev,
1011 struct class_interface *class_intf)
1012 {
1013 struct pcmcia_socket *s = class_get_devdata(class_dev);
1014 struct class_device_attribute **attr;
1015 int ret = 0;
1016 if (s->resource_ops != &pccard_nonstatic_ops)
1017 return 0;
1018
1019 for (attr = pccard_rsrc_attributes; *attr; attr++) {
1020 ret = class_device_create_file(class_dev, *attr);
1021 if (ret)
1022 break;
1023 }
1024
1025 return ret;
1026 }
1027
1028 static void __devexit pccard_sysfs_remove_rsrc(struct class_device *class_dev,
1029 struct class_interface *class_intf)
1030 {
1031 struct pcmcia_socket *s = class_get_devdata(class_dev);
1032 struct class_device_attribute **attr;
1033
1034 if (s->resource_ops != &pccard_nonstatic_ops)
1035 return;
1036
1037 for (attr = pccard_rsrc_attributes; *attr; attr++)
1038 class_device_remove_file(class_dev, *attr);
1039 }
1040
1041 static struct class_interface pccard_rsrc_interface = {
1042 .class = &pcmcia_socket_class,
1043 .add = &pccard_sysfs_add_rsrc,
1044 .remove = __devexit_p(&pccard_sysfs_remove_rsrc),
1045 };
1046
1047 static int __init nonstatic_sysfs_init(void)
1048 {
1049 return class_interface_register(&pccard_rsrc_interface);
1050 }
1051
1052 static void __exit nonstatic_sysfs_exit(void)
1053 {
1054 class_interface_unregister(&pccard_rsrc_interface);
1055 }
1056
1057 module_init(nonstatic_sysfs_init);
1058 module_exit(nonstatic_sysfs_exit);
USB Experimental Work