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