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#include <linux/io.h>
28
29#include <asm/irq.h>
30
31#include <pcmcia/ss.h>
32#include <pcmcia/cistpl.h>
33#include "cs_internal.h"
34
35/* moved to rsrc_mgr.c
36MODULE_AUTHOR("David A. Hinds, Dominik Brodowski");
37MODULE_LICENSE("GPL");
38*/
39
40/* Parameters that can be set with 'insmod' */
41
42#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
43
44INT_MODULE_PARM(probe_mem, 1); /* memory probe? */
45#ifdef CONFIG_PCMCIA_PROBE
46INT_MODULE_PARM(probe_io, 1); /* IO port probe? */
47INT_MODULE_PARM(mem_limit, 0x10000);
48#endif
49
50/* for io_db and mem_db */
51struct resource_map {
52 u_long base, num;
53 struct resource_map *next;
54};
55
56struct socket_data {
57 struct resource_map mem_db;
58 struct resource_map mem_db_valid;
59 struct resource_map io_db;
60};
61
62#define MEM_PROBE_LOW (1 << 0)
63#define MEM_PROBE_HIGH (1 << 1)
64
65/* Action field */
66#define REMOVE_MANAGED_RESOURCE 1
67#define ADD_MANAGED_RESOURCE 2
68
69/*======================================================================
70
71 Linux resource management extensions
72
73======================================================================*/
74
75static struct resource *
76claim_region(struct pcmcia_socket *s, resource_size_t base,
77 resource_size_t size, int type, char *name)
78{
79 struct resource *res, *parent;
80
81 parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource;
82 res = pcmcia_make_resource(base, size, type | IORESOURCE_BUSY, name);
83
84 if (res) {
85#ifdef CONFIG_PCI
86 if (s && s->cb_dev)
87 parent = pci_find_parent_resource(s->cb_dev, res);
88#endif
89 if (!parent || request_resource(parent, res)) {
90 kfree(res);
91 res = NULL;
92 }
93 }
94 return res;
95}
96
97static void free_region(struct resource *res)
98{
99 if (res) {
100 release_resource(res);
101 kfree(res);
102 }
103}
104
105/*======================================================================
106
107 These manage the internal databases of available resources.
108
109======================================================================*/
110
111static int add_interval(struct resource_map *map, u_long base, u_long num)
112{
113 struct resource_map *p, *q;
114
115 for (p = map; ; p = p->next) {
116 if ((p != map) && (p->base+p->num >= base)) {
117 p->num = max(num + base - p->base, p->num);
118 return 0;
119 }
120 if ((p->next == map) || (p->next->base > base+num-1))
121 break;
122 }
123 q = kmalloc(sizeof(struct resource_map), GFP_KERNEL);
124 if (!q) {
125 printk(KERN_WARNING "out of memory to update resources\n");
126 return -ENOMEM;
127 }
128 q->base = base; q->num = num;
129 q->next = p->next; p->next = q;
130 return 0;
131}
132
133/*====================================================================*/
134
135static int sub_interval(struct resource_map *map, u_long base, u_long num)
136{
137 struct resource_map *p, *q;
138
139 for (p = map; ; p = q) {
140 q = p->next;
141 if (q == map)
142 break;
143 if ((q->base+q->num > base) && (base+num > q->base)) {
144 if (q->base >= base) {
145 if (q->base+q->num <= base+num) {
146 /* Delete whole block */
147 p->next = q->next;
148 kfree(q);
149 /* don't advance the pointer yet */
150 q = p;
151 } else {
152 /* Cut off bit from the front */
153 q->num = q->base + q->num - base - num;
154 q->base = base + num;
155 }
156 } else if (q->base+q->num <= base+num) {
157 /* Cut off bit from the end */
158 q->num = base - q->base;
159 } else {
160 /* Split the block into two pieces */
161 p = kmalloc(sizeof(struct resource_map),
162 GFP_KERNEL);
163 if (!p) {
164 printk(KERN_WARNING "out of memory to update resources\n");
165 return -ENOMEM;
166 }
167 p->base = base+num;
168 p->num = q->base+q->num - p->base;
169 q->num = base - q->base;
170 p->next = q->next ; q->next = p;
171 }
172 }
173 }
174 return 0;
175}
176
177/*======================================================================
178
179 These routines examine a region of IO or memory addresses to
180 determine what ranges might be genuinely available.
181
182======================================================================*/
183
184#ifdef CONFIG_PCMCIA_PROBE
185static void do_io_probe(struct pcmcia_socket *s, unsigned int base,
186 unsigned int num)
187{
188 struct resource *res;
189 struct socket_data *s_data = s->resource_data;
190 unsigned int i, j, bad;
191 int any;
192 u_char *b, hole, most;
193
194 dev_info(&s->dev, "cs: IO port probe %#x-%#x:", base, base+num-1);
195
196 /* First, what does a floating port look like? */
197 b = kzalloc(256, GFP_KERNEL);
198 if (!b) {
199 pr_cont("\n");
200 dev_err(&s->dev, "do_io_probe: unable to kmalloc 256 bytes\n");
201 return;
202 }
203 for (i = base, most = 0; i < base+num; i += 8) {
204 res = claim_region(s, i, 8, IORESOURCE_IO, "PCMCIA ioprobe");
205 if (!res)
206 continue;
207 hole = inb(i);
208 for (j = 1; j < 8; j++)
209 if (inb(i+j) != hole)
210 break;
211 free_region(res);
212 if ((j == 8) && (++b[hole] > b[most]))
213 most = hole;
214 if (b[most] == 127)
215 break;
216 }
217 kfree(b);
218
219 bad = any = 0;
220 for (i = base; i < base+num; i += 8) {
221 res = claim_region(s, i, 8, IORESOURCE_IO, "PCMCIA ioprobe");
222 if (!res) {
223 if (!any)
224 pr_cont(" excluding");
225 if (!bad)
226 bad = any = i;
227 continue;
228 }
229 for (j = 0; j < 8; j++)
230 if (inb(i+j) != most)
231 break;
232 free_region(res);
233 if (j < 8) {
234 if (!any)
235 pr_cont(" excluding");
236 if (!bad)
237 bad = any = i;
238 } else {
239 if (bad) {
240 sub_interval(&s_data->io_db, bad, i-bad);
241 pr_cont(" %#x-%#x", bad, i-1);
242 bad = 0;
243 }
244 }
245 }
246 if (bad) {
247 if ((num > 16) && (bad == base) && (i == base+num)) {
248 sub_interval(&s_data->io_db, bad, i-bad);
249 pr_cont(" nothing: probe failed.\n");
250 return;
251 } else {
252 sub_interval(&s_data->io_db, bad, i-bad);
253 pr_cont(" %#x-%#x", bad, i-1);
254 }
255 }
256
257 pr_cont("%s\n", !any ? " clean" : "");
258}
259#endif
260
261/*======================================================================*/
262
263/**
264 * readable() - iomem validation function for cards with a valid CIS
265 */
266static int readable(struct pcmcia_socket *s, struct resource *res,
267 unsigned int *count)
268{
269 int ret = -EINVAL;
270
271 if (s->fake_cis) {
272 dev_dbg(&s->dev, "fake CIS is being used: can't validate mem\n");
273 return 0;
274 }
275
276 s->cis_mem.res = res;
277 s->cis_virt = ioremap(res->start, s->map_size);
278 if (s->cis_virt) {
279 mutex_unlock(&s->ops_mutex);
280 /* as we're only called from pcmcia.c, we're safe */
281 if (s->callback->validate)
282 ret = s->callback->validate(s, count);
283 /* invalidate mapping */
284 mutex_lock(&s->ops_mutex);
285 iounmap(s->cis_virt);
286 s->cis_virt = NULL;
287 }
288 s->cis_mem.res = NULL;
289 if ((ret) || (*count == 0))
290 return -EINVAL;
291 return 0;
292}
293
294/**
295 * checksum() - iomem validation function for simple memory cards
296 */
297static int checksum(struct pcmcia_socket *s, struct resource *res,
298 unsigned int *value)
299{
300 pccard_mem_map map;
301 int i, a = 0, b = -1, d;
302 void __iomem *virt;
303
304 virt = ioremap(res->start, s->map_size);
305 if (virt) {
306 map.map = 0;
307 map.flags = MAP_ACTIVE;
308 map.speed = 0;
309 map.res = res;
310 map.card_start = 0;
311 s->ops->set_mem_map(s, &map);
312
313 /* Don't bother checking every word... */
314 for (i = 0; i < s->map_size; i += 44) {
315 d = readl(virt+i);
316 a += d;
317 b &= d;
318 }
319
320 map.flags = 0;
321 s->ops->set_mem_map(s, &map);
322
323 iounmap(virt);
324 }
325
326 if (b == -1)
327 return -EINVAL;
328
329 *value = a;
330
331 return 0;
332}
333
334/**
335 * do_validate_mem() - low level validate a memory region for PCMCIA use
336 * @s: PCMCIA socket to validate
337 * @base: start address of resource to check
338 * @size: size of resource to check
339 * @validate: validation function to use
340 *
341 * do_validate_mem() splits up the memory region which is to be checked
342 * into two parts. Both are passed to the @validate() function. If
343 * @validate() returns non-zero, or the value parameter to @validate()
344 * is zero, or the value parameter is different between both calls,
345 * the check fails, and -EINVAL is returned. Else, 0 is returned.
346 */
347static int do_validate_mem(struct pcmcia_socket *s,
348 unsigned long base, unsigned long size,
349 int validate (struct pcmcia_socket *s,
350 struct resource *res,
351 unsigned int *value))
352{
353 struct socket_data *s_data = s->resource_data;
354 struct resource *res1, *res2;
355 unsigned int info1 = 1, info2 = 1;
356 int ret = -EINVAL;
357
358 res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe");
359 res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM,
360 "PCMCIA memprobe");
361
362 if (res1 && res2) {
363 ret = 0;
364 if (validate) {
365 ret = validate(s, res1, &info1);
366 ret += validate(s, res2, &info2);
367 }
368 }
369
370 dev_dbg(&s->dev, "cs: memory probe 0x%06lx-0x%06lx: %pr %pr %u %u %u",
371 base, base+size-1, res1, res2, ret, info1, info2);
372
373 free_region(res2);
374 free_region(res1);
375
376 if ((ret) || (info1 != info2) || (info1 == 0))
377 return -EINVAL;
378
379 if (validate && !s->fake_cis) {
380 /* move it to the validated data set */
381 add_interval(&s_data->mem_db_valid, base, size);
382 sub_interval(&s_data->mem_db, base, size);
383 }
384
385 return 0;
386}
387
388
389/**
390 * do_mem_probe() - validate a memory region for PCMCIA use
391 * @s: PCMCIA socket to validate
392 * @base: start address of resource to check
393 * @num: size of resource to check
394 * @validate: validation function to use
395 * @fallback: validation function to use if validate fails
396 *
397 * do_mem_probe() checks a memory region for use by the PCMCIA subsystem.
398 * To do so, the area is split up into sensible parts, and then passed
399 * into the @validate() function. Only if @validate() and @fallback() fail,
400 * the area is marked as unavaibale for use by the PCMCIA subsystem. The
401 * function returns the size of the usable memory area.
402 */
403static int do_mem_probe(struct pcmcia_socket *s, u_long base, u_long num,
404 int validate (struct pcmcia_socket *s,
405 struct resource *res,
406 unsigned int *value),
407 int fallback (struct pcmcia_socket *s,
408 struct resource *res,
409 unsigned int *value))
410{
411 struct socket_data *s_data = s->resource_data;
412 u_long i, j, bad, fail, step;
413
414 dev_info(&s->dev, "cs: memory probe 0x%06lx-0x%06lx:",
415 base, base+num-1);
416 bad = fail = 0;
417 step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff);
418 /* don't allow too large steps */
419 if (step > 0x800000)
420 step = 0x800000;
421 /* cis_readable wants to map 2x map_size */
422 if (step < 2 * s->map_size)
423 step = 2 * s->map_size;
424 for (i = j = base; i < base+num; i = j + step) {
425 if (!fail) {
426 for (j = i; j < base+num; j += step) {
427 if (!do_validate_mem(s, j, step, validate))
428 break;
429 }
430 fail = ((i == base) && (j == base+num));
431 }
432 if ((fail) && (fallback)) {
433 for (j = i; j < base+num; j += step)
434 if (!do_validate_mem(s, j, step, fallback))
435 break;
436 }
437 if (i != j) {
438 if (!bad)
439 pr_cont(" excluding");
440 pr_cont(" %#05lx-%#05lx", i, j-1);
441 sub_interval(&s_data->mem_db, i, j-i);
442 bad += j-i;
443 }
444 }
445 pr_cont("%s\n", !bad ? " clean" : "");
446 return num - bad;
447}
448
449
450#ifdef CONFIG_PCMCIA_PROBE
451
452/**
453 * inv_probe() - top-to-bottom search for one usuable high memory area
454 * @s: PCMCIA socket to validate
455 * @m: resource_map to check
456 */
457static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s)
458{
459 struct socket_data *s_data = s->resource_data;
460 u_long ok;
461 if (m == &s_data->mem_db)
462 return 0;
463 ok = inv_probe(m->next, s);
464 if (ok) {
465 if (m->base >= 0x100000)
466 sub_interval(&s_data->mem_db, m->base, m->num);
467 return ok;
468 }
469 if (m->base < 0x100000)
470 return 0;
471 return do_mem_probe(s, m->base, m->num, readable, checksum);
472}
473
474/**
475 * validate_mem() - memory probe function
476 * @s: PCMCIA socket to validate
477 * @probe_mask: MEM_PROBE_LOW | MEM_PROBE_HIGH
478 *
479 * The memory probe. If the memory list includes a 64K-aligned block
480 * below 1MB, we probe in 64K chunks, and as soon as we accumulate at
481 * least mem_limit free space, we quit. Returns 0 on usuable ports.
482 */
483static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
484{
485 struct resource_map *m, mm;
486 static unsigned char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 };
487 unsigned long b, i, ok = 0;
488 struct socket_data *s_data = s->resource_data;
489
490 /* We do up to four passes through the list */
491 if (probe_mask & MEM_PROBE_HIGH) {
492 if (inv_probe(s_data->mem_db.next, s) > 0)
493 return 0;
494 if (s_data->mem_db_valid.next != &s_data->mem_db_valid)
495 return 0;
496 dev_notice(&s->dev,
497 "cs: warning: no high memory space available!\n");
498 return -ENODEV;
499 }
500
501 for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
502 mm = *m;
503 /* Only probe < 1 MB */
504 if (mm.base >= 0x100000)
505 continue;
506 if ((mm.base | mm.num) & 0xffff) {
507 ok += do_mem_probe(s, mm.base, mm.num, readable,
508 checksum);
509 continue;
510 }
511 /* Special probe for 64K-aligned block */
512 for (i = 0; i < 4; i++) {
513 b = order[i] << 12;
514 if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) {
515 if (ok >= mem_limit)
516 sub_interval(&s_data->mem_db, b, 0x10000);
517 else
518 ok += do_mem_probe(s, b, 0x10000,
519 readable, checksum);
520 }
521 }
522 }
523
524 if (ok > 0)
525 return 0;
526
527 return -ENODEV;
528}
529
530#else /* CONFIG_PCMCIA_PROBE */
531
532/**
533 * validate_mem() - memory probe function
534 * @s: PCMCIA socket to validate
535 * @probe_mask: ignored
536 *
537 * Returns 0 on usuable ports.
538 */
539static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
540{
541 struct resource_map *m, mm;
542 struct socket_data *s_data = s->resource_data;
543 unsigned long ok = 0;
544
545 for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
546 mm = *m;
547 ok += do_mem_probe(s, mm.base, mm.num, readable, checksum);
548 }
549 if (ok > 0)
550 return 0;
551 return -ENODEV;
552}
553
554#endif /* CONFIG_PCMCIA_PROBE */
555
556
557/**
558 * pcmcia_nonstatic_validate_mem() - try to validate iomem for PCMCIA use
559 * @s: PCMCIA socket to validate
560 *
561 * This is tricky... when we set up CIS memory, we try to validate
562 * the memory window space allocations.
563 *
564 * Locking note: Must be called with skt_mutex held!
565 */
566static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s)
567{
568 struct socket_data *s_data = s->resource_data;
569 unsigned int probe_mask = MEM_PROBE_LOW;
570 int ret;
571
572 if (!probe_mem || !(s->state & SOCKET_PRESENT))
573 return 0;
574
575 if (s->features & SS_CAP_PAGE_REGS)
576 probe_mask = MEM_PROBE_HIGH;
577
578 ret = validate_mem(s, probe_mask);
579
580 if (s_data->mem_db_valid.next != &s_data->mem_db_valid)
581 return 0;
582
583 return ret;
584}
585
586struct pcmcia_align_data {
587 unsigned long mask;
588 unsigned long offset;
589 struct resource_map *map;
590};
591
592static resource_size_t pcmcia_common_align(struct pcmcia_align_data *align_data,
593 resource_size_t start)
594{
595 resource_size_t ret;
596 /*
597 * Ensure that we have the correct start address
598 */
599 ret = (start & ~align_data->mask) + align_data->offset;
600 if (ret < start)
601 ret += align_data->mask + 1;
602 return ret;
603}
604
605static resource_size_t
606pcmcia_align(void *align_data, const struct resource *res,
607 resource_size_t size, resource_size_t align)
608{
609 struct pcmcia_align_data *data = align_data;
610 struct resource_map *m;
611 resource_size_t start;
612
613 start = pcmcia_common_align(data, res->start);
614
615 for (m = data->map->next; m != data->map; m = m->next) {
616 unsigned long map_start = m->base;
617 unsigned long map_end = m->base + m->num - 1;
618
619 /*
620 * If the lower resources are not available, try aligning
621 * to this entry of the resource database to see if it'll
622 * fit here.
623 */
624 if (start < map_start)
625 start = pcmcia_common_align(data, map_start);
626
627 /*
628 * If we're above the area which was passed in, there's
629 * no point proceeding.
630 */
631 if (start >= res->end)
632 break;
633
634 if ((start + size - 1) <= map_end)
635 break;
636 }
637
638 /*
639 * If we failed to find something suitable, ensure we fail.
640 */
641 if (m == data->map)
642 start = res->end;
643
644 return start;
645}
646
647/*
648 * Adjust an existing IO region allocation, but making sure that we don't
649 * encroach outside the resources which the user supplied.
650 */
651static int __nonstatic_adjust_io_region(struct pcmcia_socket *s,
652 unsigned long r_start,
653 unsigned long r_end)
654{
655 struct resource_map *m;
656 struct socket_data *s_data = s->resource_data;
657 int ret = -ENOMEM;
658
659 for (m = s_data->io_db.next; m != &s_data->io_db; m = m->next) {
660 unsigned long start = m->base;
661 unsigned long end = m->base + m->num - 1;
662
663 if (start > r_start || r_end > end)
664 continue;
665
666 ret = 0;
667 }
668
669 return ret;
670}
671
672/*======================================================================
673
674 These find ranges of I/O ports or memory addresses that are not
675 currently allocated by other devices.
676
677 The 'align' field should reflect the number of bits of address
678 that need to be preserved from the initial value of *base. It
679 should be a power of two, greater than or equal to 'num'. A value
680 of 0 means that all bits of *base are significant. *base should
681 also be strictly less than 'align'.
682
683======================================================================*/
684
685static struct resource *__nonstatic_find_io_region(struct pcmcia_socket *s,
686 unsigned long base, int num,
687 unsigned long align)
688{
689 struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,
690 dev_name(&s->dev));
691 struct socket_data *s_data = s->resource_data;
692 struct pcmcia_align_data data;
693 unsigned long min = base;
694 int ret;
695
696 data.mask = align - 1;
697 data.offset = base & data.mask;
698 data.map = &s_data->io_db;
699
700#ifdef CONFIG_PCI
701 if (s->cb_dev) {
702 ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
703 min, 0, pcmcia_align, &data);
704 } else
705#endif
706 ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
707 1, pcmcia_align, &data);
708
709 if (ret != 0) {
710 kfree(res);
711 res = NULL;
712 }
713 return res;
714}
715
716static int nonstatic_find_io(struct pcmcia_socket *s, unsigned int attr,
717 unsigned int *base, unsigned int num,
718 unsigned int align, struct resource **parent)
719{
720 int i, ret = 0;
721
722 /* Check for an already-allocated window that must conflict with
723 * what was asked for. It is a hack because it does not catch all
724 * potential conflicts, just the most obvious ones.
725 */
726 for (i = 0; i < MAX_IO_WIN; i++) {
727 if (!s->io[i].res)
728 continue;
729
730 if (!*base)
731 continue;
732
733 if ((s->io[i].res->start & (align-1)) == *base)
734 return -EBUSY;
735 }
736
737 for (i = 0; i < MAX_IO_WIN; i++) {
738 struct resource *res = s->io[i].res;
739 unsigned int try;
740
741 if (res && (res->flags & IORESOURCE_BITS) !=
742 (attr & IORESOURCE_BITS))
743 continue;
744
745 if (!res) {
746 if (align == 0)
747 align = 0x10000;
748
749 res = s->io[i].res = __nonstatic_find_io_region(s,
750 *base, num,
751 align);
752 if (!res)
753 return -EINVAL;
754
755 *base = res->start;
756 s->io[i].res->flags =
757 ((res->flags & ~IORESOURCE_BITS) |
758 (attr & IORESOURCE_BITS));
759 s->io[i].InUse = num;
760 *parent = res;
761 return 0;
762 }
763
764 /* Try to extend top of window */
765 try = res->end + 1;
766 if ((*base == 0) || (*base == try)) {
767 ret = __nonstatic_adjust_io_region(s, res->start,
768 res->end + num);
769 if (!ret) {
770 ret = adjust_resource(s->io[i].res, res->start,
771 resource_size(res) + num);
772 if (ret)
773 continue;
774 *base = try;
775 s->io[i].InUse += num;
776 *parent = res;
777 return 0;
778 }
779 }
780
781 /* Try to extend bottom of window */
782 try = res->start - num;
783 if ((*base == 0) || (*base == try)) {
784 ret = __nonstatic_adjust_io_region(s,
785 res->start - num,
786 res->end);
787 if (!ret) {
788 ret = adjust_resource(s->io[i].res,
789 res->start - num,
790 resource_size(res) + num);
791 if (ret)
792 continue;
793 *base = try;
794 s->io[i].InUse += num;
795 *parent = res;
796 return 0;
797 }
798 }
799 }
800
801 return -EINVAL;
802}
803
804
805static struct resource *nonstatic_find_mem_region(u_long base, u_long num,
806 u_long align, int low, struct pcmcia_socket *s)
807{
808 struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_MEM,
809 dev_name(&s->dev));
810 struct socket_data *s_data = s->resource_data;
811 struct pcmcia_align_data data;
812 unsigned long min, max;
813 int ret, i, j;
814
815 low = low || !(s->features & SS_CAP_PAGE_REGS);
816
817 data.mask = align - 1;
818 data.offset = base & data.mask;
819
820 for (i = 0; i < 2; i++) {
821 data.map = &s_data->mem_db_valid;
822 if (low) {
823 max = 0x100000UL;
824 min = base < max ? base : 0;
825 } else {
826 max = ~0UL;
827 min = 0x100000UL + base;
828 }
829
830 for (j = 0; j < 2; j++) {
831#ifdef CONFIG_PCI
832 if (s->cb_dev) {
833 ret = pci_bus_alloc_resource(s->cb_dev->bus,
834 res, num, 1, min, 0,
835 pcmcia_align, &data);
836 } else
837#endif
838 {
839 ret = allocate_resource(&iomem_resource,
840 res, num, min, max, 1,
841 pcmcia_align, &data);
842 }
843 if (ret == 0)
844 break;
845 data.map = &s_data->mem_db;
846 }
847 if (ret == 0 || low)
848 break;
849 low = 1;
850 }
851
852 if (ret != 0) {
853 kfree(res);
854 res = NULL;
855 }
856 return res;
857}
858
859
860static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
861{
862 struct socket_data *data = s->resource_data;
863 unsigned long size = end - start + 1;
864 int ret = 0;
865
866 if (end < start)
867 return -EINVAL;
868
869 switch (action) {
870 case ADD_MANAGED_RESOURCE:
871 ret = add_interval(&data->mem_db, start, size);
872 if (!ret)
873 do_mem_probe(s, start, size, NULL, NULL);
874 break;
875 case REMOVE_MANAGED_RESOURCE:
876 ret = sub_interval(&data->mem_db, start, size);
877 break;
878 default:
879 ret = -EINVAL;
880 }
881
882 return ret;
883}
884
885
886static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
887{
888 struct socket_data *data = s->resource_data;
889 unsigned long size;
890 int ret = 0;
891
892#if defined(CONFIG_X86)
893 /* on x86, avoid anything < 0x100 for it is often used for
894 * legacy platform devices */
895 if (start < 0x100)
896 start = 0x100;
897#endif
898
899 size = end - start + 1;
900
901 if (end < start)
902 return -EINVAL;
903
904 if (end > IO_SPACE_LIMIT)
905 return -EINVAL;
906
907 switch (action) {
908 case ADD_MANAGED_RESOURCE:
909 if (add_interval(&data->io_db, start, size) != 0) {
910 ret = -EBUSY;
911 break;
912 }
913#ifdef CONFIG_PCMCIA_PROBE
914 if (probe_io)
915 do_io_probe(s, start, size);
916#endif
917 break;
918 case REMOVE_MANAGED_RESOURCE:
919 sub_interval(&data->io_db, start, size);
920 break;
921 default:
922 ret = -EINVAL;
923 break;
924 }
925
926 return ret;
927}
928
929
930#ifdef CONFIG_PCI
931static int nonstatic_autoadd_resources(struct pcmcia_socket *s)
932{
933 struct resource *res;
934 int i, done = 0;
935
936 if (!s->cb_dev || !s->cb_dev->bus)
937 return -ENODEV;
938
939#if defined(CONFIG_X86)
940 /* If this is the root bus, the risk of hitting some strange
941 * system devices is too high: If a driver isn't loaded, the
942 * resources are not claimed; even if a driver is loaded, it
943 * may not request all resources or even the wrong one. We
944 * can neither trust the rest of the kernel nor ACPI/PNP and
945 * CRS parsing to get it right. Therefore, use several
946 * safeguards:
947 *
948 * - Do not auto-add resources if the CardBus bridge is on
949 * the PCI root bus
950 *
951 * - Avoid any I/O ports < 0x100.
952 *
953 * - On PCI-PCI bridges, only use resources which are set up
954 * exclusively for the secondary PCI bus: the risk of hitting
955 * system devices is quite low, as they usually aren't
956 * connected to the secondary PCI bus.
957 */
958 if (s->cb_dev->bus->number == 0)
959 return -EINVAL;
960
961 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) {
962 res = s->cb_dev->bus->resource[i];
963#else
964 pci_bus_for_each_resource(s->cb_dev->bus, res, i) {
965#endif
966 if (!res)
967 continue;
968
969 if (res->flags & IORESOURCE_IO) {
970 /* safeguard against the root resource, where the
971 * risk of hitting any other device would be too
972 * high */
973 if (res == &ioport_resource)
974 continue;
975
976 dev_info(&s->cb_dev->dev,
977 "pcmcia: parent PCI bridge window: %pR\n",
978 res);
979 if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end))
980 done |= IORESOURCE_IO;
981
982 }
983
984 if (res->flags & IORESOURCE_MEM) {
985 /* safeguard against the root resource, where the
986 * risk of hitting any other device would be too
987 * high */
988 if (res == &iomem_resource)
989 continue;
990
991 dev_info(&s->cb_dev->dev,
992 "pcmcia: parent PCI bridge window: %pR\n",
993 res);
994 if (!adjust_memory(s, ADD_MANAGED_RESOURCE, res->start, res->end))
995 done |= IORESOURCE_MEM;
996 }
997 }
998
999 /* if we got at least one of IO, and one of MEM, we can be glad and
1000 * activate the PCMCIA subsystem */
1001 if (done == (IORESOURCE_MEM | IORESOURCE_IO))
1002 s->resource_setup_done = 1;
1003
1004 return 0;
1005}
1006
1007#else
1008
1009static inline int nonstatic_autoadd_resources(struct pcmcia_socket *s)
1010{
1011 return -ENODEV;
1012}
1013
1014#endif
1015
1016
1017static int nonstatic_init(struct pcmcia_socket *s)
1018{
1019 struct socket_data *data;
1020
1021 data = kzalloc(sizeof(struct socket_data), GFP_KERNEL);
1022 if (!data)
1023 return -ENOMEM;
1024
1025 data->mem_db.next = &data->mem_db;
1026 data->mem_db_valid.next = &data->mem_db_valid;
1027 data->io_db.next = &data->io_db;
1028
1029 s->resource_data = (void *) data;
1030
1031 nonstatic_autoadd_resources(s);
1032
1033 return 0;
1034}
1035
1036static void nonstatic_release_resource_db(struct pcmcia_socket *s)
1037{
1038 struct socket_data *data = s->resource_data;
1039 struct resource_map *p, *q;
1040
1041 for (p = data->mem_db_valid.next; p != &data->mem_db_valid; p = q) {
1042 q = p->next;
1043 kfree(p);
1044 }
1045 for (p = data->mem_db.next; p != &data->mem_db; p = q) {
1046 q = p->next;
1047 kfree(p);
1048 }
1049 for (p = data->io_db.next; p != &data->io_db; p = q) {
1050 q = p->next;
1051 kfree(p);
1052 }
1053}
1054
1055
1056struct pccard_resource_ops pccard_nonstatic_ops = {
1057 .validate_mem = pcmcia_nonstatic_validate_mem,
1058 .find_io = nonstatic_find_io,
1059 .find_mem = nonstatic_find_mem_region,
1060 .init = nonstatic_init,
1061 .exit = nonstatic_release_resource_db,
1062};
1063EXPORT_SYMBOL(pccard_nonstatic_ops);
1064
1065
1066/* sysfs interface to the resource database */
1067
1068static ssize_t show_io_db(struct device *dev,
1069 struct device_attribute *attr, char *buf)
1070{
1071 struct pcmcia_socket *s = dev_get_drvdata(dev);
1072 struct socket_data *data;
1073 struct resource_map *p;
1074 ssize_t ret = 0;
1075
1076 mutex_lock(&s->ops_mutex);
1077 data = s->resource_data;
1078
1079 for (p = data->io_db.next; p != &data->io_db; p = p->next) {
1080 if (ret > (PAGE_SIZE - 10))
1081 continue;
1082 ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
1083 "0x%08lx - 0x%08lx\n",
1084 ((unsigned long) p->base),
1085 ((unsigned long) p->base + p->num - 1));
1086 }
1087
1088 mutex_unlock(&s->ops_mutex);
1089 return ret;
1090}
1091
1092static ssize_t store_io_db(struct device *dev,
1093 struct device_attribute *attr,
1094 const char *buf, size_t count)
1095{
1096 struct pcmcia_socket *s = dev_get_drvdata(dev);
1097 unsigned long start_addr, end_addr;
1098 unsigned int add = ADD_MANAGED_RESOURCE;
1099 ssize_t ret = 0;
1100
1101 ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
1102 if (ret != 2) {
1103 ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
1104 add = REMOVE_MANAGED_RESOURCE;
1105 if (ret != 2) {
1106 ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr,
1107 &end_addr);
1108 add = ADD_MANAGED_RESOURCE;
1109 if (ret != 2)
1110 return -EINVAL;
1111 }
1112 }
1113 if (end_addr < start_addr)
1114 return -EINVAL;
1115
1116 mutex_lock(&s->ops_mutex);
1117 ret = adjust_io(s, add, start_addr, end_addr);
1118 mutex_unlock(&s->ops_mutex);
1119
1120 return ret ? ret : count;
1121}
1122static DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db);
1123
1124static ssize_t show_mem_db(struct device *dev,
1125 struct device_attribute *attr, char *buf)
1126{
1127 struct pcmcia_socket *s = dev_get_drvdata(dev);
1128 struct socket_data *data;
1129 struct resource_map *p;
1130 ssize_t ret = 0;
1131
1132 mutex_lock(&s->ops_mutex);
1133 data = s->resource_data;
1134
1135 for (p = data->mem_db_valid.next; p != &data->mem_db_valid;
1136 p = p->next) {
1137 if (ret > (PAGE_SIZE - 10))
1138 continue;
1139 ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
1140 "0x%08lx - 0x%08lx\n",
1141 ((unsigned long) p->base),
1142 ((unsigned long) p->base + p->num - 1));
1143 }
1144
1145 for (p = data->mem_db.next; p != &data->mem_db; p = p->next) {
1146 if (ret > (PAGE_SIZE - 10))
1147 continue;
1148 ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
1149 "0x%08lx - 0x%08lx\n",
1150 ((unsigned long) p->base),
1151 ((unsigned long) p->base + p->num - 1));
1152 }
1153
1154 mutex_unlock(&s->ops_mutex);
1155 return ret;
1156}
1157
1158static ssize_t store_mem_db(struct device *dev,
1159 struct device_attribute *attr,
1160 const char *buf, size_t count)
1161{
1162 struct pcmcia_socket *s = dev_get_drvdata(dev);
1163 unsigned long start_addr, end_addr;
1164 unsigned int add = ADD_MANAGED_RESOURCE;
1165 ssize_t ret = 0;
1166
1167 ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
1168 if (ret != 2) {
1169 ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
1170 add = REMOVE_MANAGED_RESOURCE;
1171 if (ret != 2) {
1172 ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr,
1173 &end_addr);
1174 add = ADD_MANAGED_RESOURCE;
1175 if (ret != 2)
1176 return -EINVAL;
1177 }
1178 }
1179 if (end_addr < start_addr)
1180 return -EINVAL;
1181
1182 mutex_lock(&s->ops_mutex);
1183 ret = adjust_memory(s, add, start_addr, end_addr);
1184 mutex_unlock(&s->ops_mutex);
1185
1186 return ret ? ret : count;
1187}
1188static DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db);
1189
1190static struct attribute *pccard_rsrc_attributes[] = {
1191 &dev_attr_available_resources_io.attr,
1192 &dev_attr_available_resources_mem.attr,
1193 NULL,
1194};
1195
1196static const struct attribute_group rsrc_attributes = {
1197 .attrs = pccard_rsrc_attributes,
1198};
1199
1200static int pccard_sysfs_add_rsrc(struct device *dev,
1201 struct class_interface *class_intf)
1202{
1203 struct pcmcia_socket *s = dev_get_drvdata(dev);
1204
1205 if (s->resource_ops != &pccard_nonstatic_ops)
1206 return 0;
1207 return sysfs_create_group(&dev->kobj, &rsrc_attributes);
1208}
1209
1210static void pccard_sysfs_remove_rsrc(struct device *dev,
1211 struct class_interface *class_intf)
1212{
1213 struct pcmcia_socket *s = dev_get_drvdata(dev);
1214
1215 if (s->resource_ops != &pccard_nonstatic_ops)
1216 return;
1217 sysfs_remove_group(&dev->kobj, &rsrc_attributes);
1218}
1219
1220static struct class_interface pccard_rsrc_interface __refdata = {
1221 .class = &pcmcia_socket_class,
1222 .add_dev = &pccard_sysfs_add_rsrc,
1223 .remove_dev = &pccard_sysfs_remove_rsrc,
1224};
1225
1226static int __init nonstatic_sysfs_init(void)
1227{
1228 return class_interface_register(&pccard_rsrc_interface);
1229}
1230
1231static void __exit nonstatic_sysfs_exit(void)
1232{
1233 class_interface_unregister(&pccard_rsrc_interface);
1234}
1235
1236module_init(nonstatic_sysfs_init);
1237module_exit(nonstatic_sysfs_exit);
1238