Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
9fea84f4 | 27 | #include <linux/io.h> |
1da177e4 LT |
28 | |
29 | #include <asm/irq.h> | |
1da177e4 LT |
30 | |
31 | #include <pcmcia/cs_types.h> | |
32 | #include <pcmcia/ss.h> | |
33 | #include <pcmcia/cs.h> | |
1da177e4 LT |
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 io_db; | |
59 | unsigned int rsrc_mem_probe; | |
60 | }; | |
61 | ||
7fe908dd | 62 | static DEFINE_MUTEX(rsrc_mutex); |
1da177e4 LT |
63 | #define MEM_PROBE_LOW (1 << 0) |
64 | #define MEM_PROBE_HIGH (1 << 1) | |
65 | ||
66 | ||
67 | /*====================================================================== | |
68 | ||
69 | Linux resource management extensions | |
70 | ||
71 | ======================================================================*/ | |
72 | ||
73 | static struct resource * | |
25096986 | 74 | make_resource(resource_size_t b, resource_size_t n, int flags, const char *name) |
1da177e4 | 75 | { |
8084b372 | 76 | struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL); |
1da177e4 LT |
77 | |
78 | if (res) { | |
1da177e4 LT |
79 | res->name = name; |
80 | res->start = b; | |
81 | res->end = b + n - 1; | |
82 | res->flags = flags; | |
83 | } | |
84 | return res; | |
85 | } | |
86 | ||
87 | static struct resource * | |
2427ddd8 GKH |
88 | claim_region(struct pcmcia_socket *s, resource_size_t base, |
89 | resource_size_t size, int type, char *name) | |
1da177e4 LT |
90 | { |
91 | struct resource *res, *parent; | |
92 | ||
93 | parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource; | |
94 | res = make_resource(base, size, type | IORESOURCE_BUSY, name); | |
95 | ||
96 | if (res) { | |
97 | #ifdef CONFIG_PCI | |
98 | if (s && s->cb_dev) | |
99 | parent = pci_find_parent_resource(s->cb_dev, res); | |
100 | #endif | |
101 | if (!parent || request_resource(parent, res)) { | |
102 | kfree(res); | |
103 | res = NULL; | |
104 | } | |
105 | } | |
106 | return res; | |
107 | } | |
108 | ||
109 | static void free_region(struct resource *res) | |
110 | { | |
111 | if (res) { | |
112 | release_resource(res); | |
113 | kfree(res); | |
114 | } | |
115 | } | |
116 | ||
117 | /*====================================================================== | |
118 | ||
119 | These manage the internal databases of available resources. | |
120 | ||
121 | ======================================================================*/ | |
122 | ||
123 | static int add_interval(struct resource_map *map, u_long base, u_long num) | |
124 | { | |
1168386a | 125 | struct resource_map *p, *q; |
1da177e4 | 126 | |
1168386a DB |
127 | for (p = map; ; p = p->next) { |
128 | if ((p != map) && (p->base+p->num-1 >= base)) | |
129 | return -1; | |
130 | if ((p->next == map) || (p->next->base > base+num-1)) | |
131 | break; | |
132 | } | |
133 | q = kmalloc(sizeof(struct resource_map), GFP_KERNEL); | |
134 | if (!q) { | |
135 | printk(KERN_WARNING "out of memory to update resources\n"); | |
136 | return -ENOMEM; | |
137 | } | |
138 | q->base = base; q->num = num; | |
139 | q->next = p->next; p->next = q; | |
140 | return 0; | |
1da177e4 LT |
141 | } |
142 | ||
143 | /*====================================================================*/ | |
144 | ||
145 | static int sub_interval(struct resource_map *map, u_long base, u_long num) | |
146 | { | |
9fea84f4 DB |
147 | struct resource_map *p, *q; |
148 | ||
149 | for (p = map; ; p = q) { | |
150 | q = p->next; | |
151 | if (q == map) | |
152 | break; | |
153 | if ((q->base+q->num > base) && (base+num > q->base)) { | |
154 | if (q->base >= base) { | |
155 | if (q->base+q->num <= base+num) { | |
156 | /* Delete whole block */ | |
157 | p->next = q->next; | |
158 | kfree(q); | |
159 | /* don't advance the pointer yet */ | |
160 | q = p; | |
161 | } else { | |
162 | /* Cut off bit from the front */ | |
163 | q->num = q->base + q->num - base - num; | |
164 | q->base = base + num; | |
165 | } | |
166 | } else if (q->base+q->num <= base+num) { | |
167 | /* Cut off bit from the end */ | |
168 | q->num = base - q->base; | |
169 | } else { | |
170 | /* Split the block into two pieces */ | |
171 | p = kmalloc(sizeof(struct resource_map), | |
172 | GFP_KERNEL); | |
173 | if (!p) { | |
174 | printk(KERN_WARNING "out of memory to update resources\n"); | |
175 | return -ENOMEM; | |
176 | } | |
177 | p->base = base+num; | |
178 | p->num = q->base+q->num - p->base; | |
179 | q->num = base - q->base; | |
180 | p->next = q->next ; q->next = p; | |
181 | } | |
1168386a | 182 | } |
9fea84f4 DB |
183 | } |
184 | return 0; | |
1da177e4 LT |
185 | } |
186 | ||
187 | /*====================================================================== | |
188 | ||
189 | These routines examine a region of IO or memory addresses to | |
190 | determine what ranges might be genuinely available. | |
191 | ||
192 | ======================================================================*/ | |
193 | ||
194 | #ifdef CONFIG_PCMCIA_PROBE | |
906da809 OJ |
195 | static void do_io_probe(struct pcmcia_socket *s, unsigned int base, |
196 | unsigned int num) | |
1da177e4 | 197 | { |
9fea84f4 DB |
198 | struct resource *res; |
199 | struct socket_data *s_data = s->resource_data; | |
200 | unsigned int i, j, bad; | |
201 | int any; | |
202 | u_char *b, hole, most; | |
203 | ||
204 | dev_printk(KERN_INFO, &s->dev, "cs: IO port probe %#x-%#x:", | |
205 | base, base+num-1); | |
206 | ||
207 | /* First, what does a floating port look like? */ | |
208 | b = kzalloc(256, GFP_KERNEL); | |
209 | if (!b) { | |
210 | printk("\n"); | |
211 | dev_printk(KERN_ERR, &s->dev, | |
212 | "do_io_probe: unable to kmalloc 256 bytes"); | |
213 | return; | |
214 | } | |
215 | for (i = base, most = 0; i < base+num; i += 8) { | |
216 | res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA ioprobe"); | |
217 | if (!res) | |
218 | continue; | |
219 | hole = inb(i); | |
220 | for (j = 1; j < 8; j++) | |
221 | if (inb(i+j) != hole) | |
222 | break; | |
223 | free_region(res); | |
224 | if ((j == 8) && (++b[hole] > b[most])) | |
225 | most = hole; | |
226 | if (b[most] == 127) | |
227 | break; | |
228 | } | |
229 | kfree(b); | |
230 | ||
231 | bad = any = 0; | |
232 | for (i = base; i < base+num; i += 8) { | |
233 | res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA ioprobe"); | |
234 | if (!res) | |
235 | continue; | |
236 | for (j = 0; j < 8; j++) | |
237 | if (inb(i+j) != most) | |
238 | break; | |
239 | free_region(res); | |
240 | if (j < 8) { | |
241 | if (!any) | |
242 | printk(" excluding"); | |
243 | if (!bad) | |
244 | bad = any = i; | |
245 | } else { | |
246 | if (bad) { | |
247 | sub_interval(&s_data->io_db, bad, i-bad); | |
248 | printk(" %#x-%#x", bad, i-1); | |
249 | bad = 0; | |
250 | } | |
251 | } | |
252 | } | |
253 | if (bad) { | |
254 | if ((num > 16) && (bad == base) && (i == base+num)) { | |
255 | printk(" nothing: probe failed.\n"); | |
256 | return; | |
257 | } else { | |
258 | sub_interval(&s_data->io_db, bad, i-bad); | |
259 | printk(" %#x-%#x", bad, i-1); | |
260 | } | |
261 | } | |
262 | ||
263 | printk(any ? "\n" : " clean.\n"); | |
1da177e4 LT |
264 | } |
265 | #endif | |
266 | ||
267 | /*====================================================================== | |
268 | ||
269 | This is tricky... when we set up CIS memory, we try to validate | |
270 | the memory window space allocations. | |
271 | ||
272 | ======================================================================*/ | |
273 | ||
274 | /* Validation function for cards with a valid CIS */ | |
c5081d5f DB |
275 | static int readable(struct pcmcia_socket *s, struct resource *res, |
276 | unsigned int *count) | |
1da177e4 LT |
277 | { |
278 | int ret = -1; | |
279 | ||
280 | s->cis_mem.res = res; | |
281 | s->cis_virt = ioremap(res->start, s->map_size); | |
282 | if (s->cis_virt) { | |
84897fc0 | 283 | ret = pccard_validate_cis(s, count); |
904e3777 | 284 | /* invalidate mapping */ |
1da177e4 LT |
285 | iounmap(s->cis_virt); |
286 | s->cis_virt = NULL; | |
1da177e4 LT |
287 | } |
288 | s->cis_mem.res = NULL; | |
0e09c863 | 289 | if ((ret != 0) || (*count == 0)) |
1da177e4 LT |
290 | return 0; |
291 | return 1; | |
292 | } | |
293 | ||
294 | /* Validation function for simple memory cards */ | |
295 | static int checksum(struct pcmcia_socket *s, struct resource *res) | |
296 | { | |
297 | pccard_mem_map map; | |
298 | int i, a = 0, b = -1, d; | |
299 | void __iomem *virt; | |
300 | ||
301 | virt = ioremap(res->start, s->map_size); | |
302 | if (virt) { | |
303 | map.map = 0; | |
304 | map.flags = MAP_ACTIVE; | |
305 | map.speed = 0; | |
306 | map.res = res; | |
307 | map.card_start = 0; | |
308 | s->ops->set_mem_map(s, &map); | |
309 | ||
310 | /* Don't bother checking every word... */ | |
311 | for (i = 0; i < s->map_size; i += 44) { | |
312 | d = readl(virt+i); | |
313 | a += d; | |
314 | b &= d; | |
315 | } | |
316 | ||
317 | map.flags = 0; | |
318 | s->ops->set_mem_map(s, &map); | |
319 | ||
320 | iounmap(virt); | |
321 | } | |
322 | ||
323 | return (b == -1) ? -1 : (a>>1); | |
324 | } | |
325 | ||
326 | static int | |
327 | cis_readable(struct pcmcia_socket *s, unsigned long base, unsigned long size) | |
328 | { | |
329 | struct resource *res1, *res2; | |
c5081d5f | 330 | unsigned int info1, info2; |
1da177e4 LT |
331 | int ret = 0; |
332 | ||
9fea84f4 DB |
333 | res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe"); |
334 | res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, | |
335 | "PCMCIA memprobe"); | |
1da177e4 LT |
336 | |
337 | if (res1 && res2) { | |
338 | ret = readable(s, res1, &info1); | |
339 | ret += readable(s, res2, &info2); | |
340 | } | |
341 | ||
342 | free_region(res2); | |
343 | free_region(res1); | |
344 | ||
c5081d5f | 345 | return (ret == 2) && (info1 == info2); |
1da177e4 LT |
346 | } |
347 | ||
348 | static int | |
349 | checksum_match(struct pcmcia_socket *s, unsigned long base, unsigned long size) | |
350 | { | |
351 | struct resource *res1, *res2; | |
352 | int a = -1, b = -1; | |
353 | ||
9fea84f4 DB |
354 | res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe"); |
355 | res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, | |
356 | "PCMCIA memprobe"); | |
1da177e4 LT |
357 | |
358 | if (res1 && res2) { | |
359 | a = checksum(s, res1); | |
360 | b = checksum(s, res2); | |
361 | } | |
362 | ||
363 | free_region(res2); | |
364 | free_region(res1); | |
365 | ||
366 | return (a == b) && (a >= 0); | |
367 | } | |
368 | ||
369 | /*====================================================================== | |
370 | ||
371 | The memory probe. If the memory list includes a 64K-aligned block | |
372 | below 1MB, we probe in 64K chunks, and as soon as we accumulate at | |
373 | least mem_limit free space, we quit. | |
374 | ||
375 | ======================================================================*/ | |
376 | ||
377 | static int do_mem_probe(u_long base, u_long num, struct pcmcia_socket *s) | |
378 | { | |
9fea84f4 DB |
379 | struct socket_data *s_data = s->resource_data; |
380 | u_long i, j, bad, fail, step; | |
381 | ||
382 | dev_printk(KERN_INFO, &s->dev, "cs: memory probe 0x%06lx-0x%06lx:", | |
383 | base, base+num-1); | |
384 | bad = fail = 0; | |
385 | step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff); | |
386 | /* don't allow too large steps */ | |
387 | if (step > 0x800000) | |
388 | step = 0x800000; | |
389 | /* cis_readable wants to map 2x map_size */ | |
390 | if (step < 2 * s->map_size) | |
391 | step = 2 * s->map_size; | |
392 | for (i = j = base; i < base+num; i = j + step) { | |
393 | if (!fail) { | |
394 | for (j = i; j < base+num; j += step) { | |
395 | if (cis_readable(s, j, step)) | |
396 | break; | |
397 | } | |
398 | fail = ((i == base) && (j == base+num)); | |
399 | } | |
400 | if (fail) { | |
401 | for (j = i; j < base+num; j += 2*step) | |
402 | if (checksum_match(s, j, step) && | |
403 | checksum_match(s, j + step, step)) | |
404 | break; | |
405 | } | |
406 | if (i != j) { | |
407 | if (!bad) | |
408 | printk(" excluding"); | |
409 | printk(" %#05lx-%#05lx", i, j-1); | |
410 | sub_interval(&s_data->mem_db, i, j-i); | |
411 | bad += j-i; | |
412 | } | |
413 | } | |
414 | printk(bad ? "\n" : " clean.\n"); | |
415 | return num - bad; | |
1da177e4 LT |
416 | } |
417 | ||
418 | #ifdef CONFIG_PCMCIA_PROBE | |
419 | ||
420 | static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s) | |
421 | { | |
de75914e DB |
422 | struct socket_data *s_data = s->resource_data; |
423 | u_long ok; | |
424 | if (m == &s_data->mem_db) | |
425 | return 0; | |
426 | ok = inv_probe(m->next, s); | |
427 | if (ok) { | |
428 | if (m->base >= 0x100000) | |
429 | sub_interval(&s_data->mem_db, m->base, m->num); | |
430 | return ok; | |
431 | } | |
432 | if (m->base < 0x100000) | |
433 | return 0; | |
434 | return do_mem_probe(m->base, m->num, s); | |
1da177e4 LT |
435 | } |
436 | ||
de75914e | 437 | static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask) |
1da177e4 | 438 | { |
de75914e DB |
439 | struct resource_map *m, mm; |
440 | static unsigned char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 }; | |
441 | unsigned long b, i, ok = 0; | |
442 | struct socket_data *s_data = s->resource_data; | |
1da177e4 | 443 | |
de75914e DB |
444 | /* We do up to four passes through the list */ |
445 | if (probe_mask & MEM_PROBE_HIGH) { | |
446 | if (inv_probe(s_data->mem_db.next, s) > 0) | |
447 | return 0; | |
dbe4ea5f DB |
448 | dev_printk(KERN_NOTICE, &s->dev, |
449 | "cs: warning: no high memory space available!\n"); | |
de75914e | 450 | return -ENODEV; |
1da177e4 | 451 | } |
de75914e DB |
452 | |
453 | for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) { | |
454 | mm = *m; | |
455 | /* Only probe < 1 MB */ | |
456 | if (mm.base >= 0x100000) | |
457 | continue; | |
458 | if ((mm.base | mm.num) & 0xffff) { | |
459 | ok += do_mem_probe(mm.base, mm.num, s); | |
460 | continue; | |
461 | } | |
462 | /* Special probe for 64K-aligned block */ | |
463 | for (i = 0; i < 4; i++) { | |
464 | b = order[i] << 12; | |
465 | if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) { | |
466 | if (ok >= mem_limit) | |
467 | sub_interval(&s_data->mem_db, b, 0x10000); | |
468 | else | |
469 | ok += do_mem_probe(b, 0x10000, s); | |
470 | } | |
471 | } | |
1da177e4 | 472 | } |
de75914e DB |
473 | |
474 | if (ok > 0) | |
475 | return 0; | |
476 | ||
477 | return -ENODEV; | |
1da177e4 LT |
478 | } |
479 | ||
480 | #else /* CONFIG_PCMCIA_PROBE */ | |
481 | ||
2cff9447 | 482 | static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask) |
1da177e4 LT |
483 | { |
484 | struct resource_map *m, mm; | |
485 | struct socket_data *s_data = s->resource_data; | |
2cff9447 | 486 | unsigned long ok = 0; |
1da177e4 LT |
487 | |
488 | for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) { | |
489 | mm = *m; | |
2cff9447 | 490 | ok += do_mem_probe(mm.base, mm.num, s); |
1da177e4 | 491 | } |
2cff9447 AM |
492 | if (ok > 0) |
493 | return 0; | |
494 | return -ENODEV; | |
1da177e4 LT |
495 | } |
496 | ||
497 | #endif /* CONFIG_PCMCIA_PROBE */ | |
498 | ||
499 | ||
500 | /* | |
7fe908dd | 501 | * Locking note: Must be called with skt_mutex held! |
1da177e4 | 502 | */ |
de75914e | 503 | static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s) |
1da177e4 LT |
504 | { |
505 | struct socket_data *s_data = s->resource_data; | |
de75914e DB |
506 | unsigned int probe_mask = MEM_PROBE_LOW; |
507 | int ret = 0; | |
508 | ||
509 | if (!probe_mem) | |
510 | return 0; | |
1da177e4 | 511 | |
7fe908dd | 512 | mutex_lock(&rsrc_mutex); |
1da177e4 | 513 | |
de75914e DB |
514 | if (s->features & SS_CAP_PAGE_REGS) |
515 | probe_mask = MEM_PROBE_HIGH; | |
1da177e4 | 516 | |
de75914e DB |
517 | if (probe_mask & ~s_data->rsrc_mem_probe) { |
518 | if (s->state & SOCKET_PRESENT) | |
519 | ret = validate_mem(s, probe_mask); | |
520 | if (!ret) | |
1da177e4 | 521 | s_data->rsrc_mem_probe |= probe_mask; |
de75914e | 522 | } |
1da177e4 | 523 | |
7fe908dd | 524 | mutex_unlock(&rsrc_mutex); |
1da177e4 | 525 | |
de75914e | 526 | return ret; |
1da177e4 LT |
527 | } |
528 | ||
529 | struct pcmcia_align_data { | |
530 | unsigned long mask; | |
531 | unsigned long offset; | |
532 | struct resource_map *map; | |
533 | }; | |
534 | ||
535 | static void | |
536 | pcmcia_common_align(void *align_data, struct resource *res, | |
2427ddd8 | 537 | resource_size_t size, resource_size_t align) |
1da177e4 LT |
538 | { |
539 | struct pcmcia_align_data *data = align_data; | |
2427ddd8 | 540 | resource_size_t start; |
1da177e4 LT |
541 | /* |
542 | * Ensure that we have the correct start address | |
543 | */ | |
544 | start = (res->start & ~data->mask) + data->offset; | |
545 | if (start < res->start) | |
546 | start += data->mask + 1; | |
547 | res->start = start; | |
548 | } | |
549 | ||
550 | static void | |
2427ddd8 GKH |
551 | pcmcia_align(void *align_data, struct resource *res, resource_size_t size, |
552 | resource_size_t align) | |
1da177e4 LT |
553 | { |
554 | struct pcmcia_align_data *data = align_data; | |
555 | struct resource_map *m; | |
556 | ||
557 | pcmcia_common_align(data, res, size, align); | |
558 | ||
559 | for (m = data->map->next; m != data->map; m = m->next) { | |
560 | unsigned long start = m->base; | |
561 | unsigned long end = m->base + m->num - 1; | |
562 | ||
563 | /* | |
564 | * If the lower resources are not available, try aligning | |
565 | * to this entry of the resource database to see if it'll | |
566 | * fit here. | |
567 | */ | |
568 | if (res->start < start) { | |
569 | res->start = start; | |
570 | pcmcia_common_align(data, res, size, align); | |
571 | } | |
572 | ||
573 | /* | |
574 | * If we're above the area which was passed in, there's | |
575 | * no point proceeding. | |
576 | */ | |
577 | if (res->start >= res->end) | |
578 | break; | |
579 | ||
580 | if ((res->start + size - 1) <= end) | |
581 | break; | |
582 | } | |
583 | ||
584 | /* | |
585 | * If we failed to find something suitable, ensure we fail. | |
586 | */ | |
587 | if (m == data->map) | |
588 | res->start = res->end; | |
589 | } | |
590 | ||
591 | /* | |
592 | * Adjust an existing IO region allocation, but making sure that we don't | |
593 | * encroach outside the resources which the user supplied. | |
594 | */ | |
595 | static int nonstatic_adjust_io_region(struct resource *res, unsigned long r_start, | |
596 | unsigned long r_end, struct pcmcia_socket *s) | |
597 | { | |
598 | struct resource_map *m; | |
599 | struct socket_data *s_data = s->resource_data; | |
600 | int ret = -ENOMEM; | |
601 | ||
7fe908dd | 602 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
603 | for (m = s_data->io_db.next; m != &s_data->io_db; m = m->next) { |
604 | unsigned long start = m->base; | |
605 | unsigned long end = m->base + m->num - 1; | |
606 | ||
607 | if (start > r_start || r_end > end) | |
608 | continue; | |
609 | ||
610 | ret = adjust_resource(res, r_start, r_end - r_start + 1); | |
611 | break; | |
612 | } | |
7fe908dd | 613 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
614 | |
615 | return ret; | |
616 | } | |
617 | ||
618 | /*====================================================================== | |
619 | ||
620 | These find ranges of I/O ports or memory addresses that are not | |
621 | currently allocated by other devices. | |
622 | ||
623 | The 'align' field should reflect the number of bits of address | |
624 | that need to be preserved from the initial value of *base. It | |
625 | should be a power of two, greater than or equal to 'num'. A value | |
626 | of 0 means that all bits of *base are significant. *base should | |
627 | also be strictly less than 'align'. | |
628 | ||
629 | ======================================================================*/ | |
630 | ||
e94e15f7 | 631 | static struct resource *nonstatic_find_io_region(unsigned long base, int num, |
1da177e4 LT |
632 | unsigned long align, struct pcmcia_socket *s) |
633 | { | |
25096986 | 634 | struct resource *res = make_resource(0, num, IORESOURCE_IO, dev_name(&s->dev)); |
1da177e4 LT |
635 | struct socket_data *s_data = s->resource_data; |
636 | struct pcmcia_align_data data; | |
637 | unsigned long min = base; | |
638 | int ret; | |
639 | ||
640 | if (align == 0) | |
641 | align = 0x10000; | |
642 | ||
643 | data.mask = align - 1; | |
644 | data.offset = base & data.mask; | |
645 | data.map = &s_data->io_db; | |
646 | ||
7fe908dd | 647 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
648 | #ifdef CONFIG_PCI |
649 | if (s->cb_dev) { | |
650 | ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1, | |
651 | min, 0, pcmcia_align, &data); | |
652 | } else | |
653 | #endif | |
654 | ret = allocate_resource(&ioport_resource, res, num, min, ~0UL, | |
655 | 1, pcmcia_align, &data); | |
7fe908dd | 656 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
657 | |
658 | if (ret != 0) { | |
659 | kfree(res); | |
660 | res = NULL; | |
661 | } | |
662 | return res; | |
663 | } | |
664 | ||
9fea84f4 | 665 | static struct resource *nonstatic_find_mem_region(u_long base, u_long num, |
e94e15f7 | 666 | u_long align, int low, struct pcmcia_socket *s) |
1da177e4 | 667 | { |
25096986 | 668 | struct resource *res = make_resource(0, num, IORESOURCE_MEM, dev_name(&s->dev)); |
1da177e4 LT |
669 | struct socket_data *s_data = s->resource_data; |
670 | struct pcmcia_align_data data; | |
671 | unsigned long min, max; | |
672 | int ret, i; | |
673 | ||
674 | low = low || !(s->features & SS_CAP_PAGE_REGS); | |
675 | ||
676 | data.mask = align - 1; | |
677 | data.offset = base & data.mask; | |
678 | data.map = &s_data->mem_db; | |
679 | ||
680 | for (i = 0; i < 2; i++) { | |
681 | if (low) { | |
682 | max = 0x100000UL; | |
683 | min = base < max ? base : 0; | |
684 | } else { | |
685 | max = ~0UL; | |
686 | min = 0x100000UL + base; | |
687 | } | |
688 | ||
7fe908dd | 689 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
690 | #ifdef CONFIG_PCI |
691 | if (s->cb_dev) { | |
692 | ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, | |
693 | 1, min, 0, | |
694 | pcmcia_align, &data); | |
695 | } else | |
696 | #endif | |
697 | ret = allocate_resource(&iomem_resource, res, num, min, | |
698 | max, 1, pcmcia_align, &data); | |
7fe908dd | 699 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
700 | if (ret == 0 || low) |
701 | break; | |
702 | low = 1; | |
703 | } | |
704 | ||
705 | if (ret != 0) { | |
706 | kfree(res); | |
707 | res = NULL; | |
708 | } | |
709 | return res; | |
710 | } | |
711 | ||
712 | ||
22916638 | 713 | static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end) |
1da177e4 | 714 | { |
1da177e4 | 715 | struct socket_data *data = s->resource_data; |
22916638 DB |
716 | unsigned long size = end - start + 1; |
717 | int ret = 0; | |
1da177e4 | 718 | |
1146bc74 | 719 | if (end < start) |
22916638 | 720 | return -EINVAL; |
1da177e4 | 721 | |
7fe908dd | 722 | mutex_lock(&rsrc_mutex); |
22916638 | 723 | switch (action) { |
1da177e4 | 724 | case ADD_MANAGED_RESOURCE: |
22916638 | 725 | ret = add_interval(&data->mem_db, start, size); |
1da177e4 LT |
726 | break; |
727 | case REMOVE_MANAGED_RESOURCE: | |
22916638 | 728 | ret = sub_interval(&data->mem_db, start, size); |
1da177e4 LT |
729 | break; |
730 | default: | |
22916638 | 731 | ret = -EINVAL; |
1da177e4 | 732 | } |
7fe908dd | 733 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
734 | |
735 | return ret; | |
736 | } | |
737 | ||
738 | ||
22916638 | 739 | static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end) |
1da177e4 LT |
740 | { |
741 | struct socket_data *data = s->resource_data; | |
22916638 DB |
742 | unsigned long size = end - start + 1; |
743 | int ret = 0; | |
1da177e4 | 744 | |
1146bc74 | 745 | if (end < start) |
22916638 DB |
746 | return -EINVAL; |
747 | ||
748 | if (end > IO_SPACE_LIMIT) | |
749 | return -EINVAL; | |
1da177e4 | 750 | |
7fe908dd | 751 | mutex_lock(&rsrc_mutex); |
22916638 | 752 | switch (action) { |
1da177e4 | 753 | case ADD_MANAGED_RESOURCE: |
22916638 DB |
754 | if (add_interval(&data->io_db, start, size) != 0) { |
755 | ret = -EBUSY; | |
1da177e4 LT |
756 | break; |
757 | } | |
758 | #ifdef CONFIG_PCMCIA_PROBE | |
759 | if (probe_io) | |
22916638 | 760 | do_io_probe(s, start, size); |
1da177e4 LT |
761 | #endif |
762 | break; | |
763 | case REMOVE_MANAGED_RESOURCE: | |
22916638 | 764 | sub_interval(&data->io_db, start, size); |
1da177e4 LT |
765 | break; |
766 | default: | |
22916638 | 767 | ret = -EINVAL; |
1da177e4 LT |
768 | break; |
769 | } | |
7fe908dd | 770 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
771 | |
772 | return ret; | |
773 | } | |
774 | ||
775 | ||
3c29976a DB |
776 | #ifdef CONFIG_PCI |
777 | static int nonstatic_autoadd_resources(struct pcmcia_socket *s) | |
778 | { | |
779 | struct resource *res; | |
780 | int i, done = 0; | |
781 | ||
782 | if (!s->cb_dev || !s->cb_dev->bus) | |
783 | return -ENODEV; | |
784 | ||
0d078f6f | 785 | #if defined(CONFIG_X86) |
b6d00f0d DB |
786 | /* If this is the root bus, the risk of hitting |
787 | * some strange system devices which aren't protected | |
788 | * by either ACPI resource tables or properly requested | |
789 | * resources is too big. Therefore, don't do auto-adding | |
790 | * of resources at the moment. | |
791 | */ | |
792 | if (s->cb_dev->bus->number == 0) | |
793 | return -EINVAL; | |
794 | #endif | |
795 | ||
9fea84f4 | 796 | for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { |
3c29976a DB |
797 | res = s->cb_dev->bus->resource[i]; |
798 | if (!res) | |
799 | continue; | |
800 | ||
801 | if (res->flags & IORESOURCE_IO) { | |
802 | if (res == &ioport_resource) | |
803 | continue; | |
dbe4ea5f DB |
804 | dev_printk(KERN_INFO, &s->cb_dev->dev, |
805 | "pcmcia: parent PCI bridge I/O " | |
806 | "window: 0x%llx - 0x%llx\n", | |
807 | (unsigned long long)res->start, | |
808 | (unsigned long long)res->end); | |
3c29976a DB |
809 | if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end)) |
810 | done |= IORESOURCE_IO; | |
811 | ||
812 | } | |
813 | ||
814 | if (res->flags & IORESOURCE_MEM) { | |
815 | if (res == &iomem_resource) | |
816 | continue; | |
dbe4ea5f DB |
817 | dev_printk(KERN_INFO, &s->cb_dev->dev, |
818 | "pcmcia: parent PCI bridge Memory " | |
819 | "window: 0x%llx - 0x%llx\n", | |
820 | (unsigned long long)res->start, | |
821 | (unsigned long long)res->end); | |
3c29976a DB |
822 | if (!adjust_memory(s, ADD_MANAGED_RESOURCE, res->start, res->end)) |
823 | done |= IORESOURCE_MEM; | |
824 | } | |
825 | } | |
826 | ||
827 | /* if we got at least one of IO, and one of MEM, we can be glad and | |
828 | * activate the PCMCIA subsystem */ | |
54bb5675 | 829 | if (done == (IORESOURCE_MEM | IORESOURCE_IO)) |
3c29976a DB |
830 | s->resource_setup_done = 1; |
831 | ||
832 | return 0; | |
833 | } | |
834 | ||
835 | #else | |
836 | ||
837 | static inline int nonstatic_autoadd_resources(struct pcmcia_socket *s) | |
838 | { | |
839 | return -ENODEV; | |
840 | } | |
841 | ||
842 | #endif | |
843 | ||
844 | ||
1da177e4 LT |
845 | static int nonstatic_init(struct pcmcia_socket *s) |
846 | { | |
847 | struct socket_data *data; | |
848 | ||
8084b372 | 849 | data = kzalloc(sizeof(struct socket_data), GFP_KERNEL); |
1da177e4 LT |
850 | if (!data) |
851 | return -ENOMEM; | |
1da177e4 LT |
852 | |
853 | data->mem_db.next = &data->mem_db; | |
854 | data->io_db.next = &data->io_db; | |
855 | ||
856 | s->resource_data = (void *) data; | |
857 | ||
3c29976a DB |
858 | nonstatic_autoadd_resources(s); |
859 | ||
1da177e4 LT |
860 | return 0; |
861 | } | |
862 | ||
863 | static void nonstatic_release_resource_db(struct pcmcia_socket *s) | |
864 | { | |
865 | struct socket_data *data = s->resource_data; | |
866 | struct resource_map *p, *q; | |
867 | ||
7fe908dd | 868 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
869 | for (p = data->mem_db.next; p != &data->mem_db; p = q) { |
870 | q = p->next; | |
871 | kfree(p); | |
872 | } | |
873 | for (p = data->io_db.next; p != &data->io_db; p = q) { | |
874 | q = p->next; | |
875 | kfree(p); | |
876 | } | |
7fe908dd | 877 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
878 | } |
879 | ||
880 | ||
881 | struct pccard_resource_ops pccard_nonstatic_ops = { | |
882 | .validate_mem = pcmcia_nonstatic_validate_mem, | |
883 | .adjust_io_region = nonstatic_adjust_io_region, | |
884 | .find_io = nonstatic_find_io_region, | |
885 | .find_mem = nonstatic_find_mem_region, | |
c5023801 DB |
886 | .add_io = adjust_io, |
887 | .add_mem = adjust_memory, | |
1da177e4 LT |
888 | .init = nonstatic_init, |
889 | .exit = nonstatic_release_resource_db, | |
890 | }; | |
891 | EXPORT_SYMBOL(pccard_nonstatic_ops); | |
892 | ||
893 | ||
894 | /* sysfs interface to the resource database */ | |
895 | ||
87373318 GKH |
896 | static ssize_t show_io_db(struct device *dev, |
897 | struct device_attribute *attr, char *buf) | |
1da177e4 | 898 | { |
87373318 | 899 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4 LT |
900 | struct socket_data *data; |
901 | struct resource_map *p; | |
902 | ssize_t ret = 0; | |
903 | ||
7fe908dd | 904 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
905 | data = s->resource_data; |
906 | ||
907 | for (p = data->io_db.next; p != &data->io_db; p = p->next) { | |
908 | if (ret > (PAGE_SIZE - 10)) | |
909 | continue; | |
9fea84f4 DB |
910 | ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1), |
911 | "0x%08lx - 0x%08lx\n", | |
912 | ((unsigned long) p->base), | |
913 | ((unsigned long) p->base + p->num - 1)); | |
1da177e4 LT |
914 | } |
915 | ||
7fe908dd | 916 | mutex_unlock(&rsrc_mutex); |
9fea84f4 | 917 | return ret; |
1da177e4 LT |
918 | } |
919 | ||
87373318 GKH |
920 | static ssize_t store_io_db(struct device *dev, |
921 | struct device_attribute *attr, | |
922 | const char *buf, size_t count) | |
1da177e4 | 923 | { |
87373318 | 924 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4 | 925 | unsigned long start_addr, end_addr; |
22916638 | 926 | unsigned int add = ADD_MANAGED_RESOURCE; |
1da177e4 LT |
927 | ssize_t ret = 0; |
928 | ||
9fea84f4 | 929 | ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr); |
1da177e4 | 930 | if (ret != 2) { |
9fea84f4 | 931 | ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr); |
22916638 | 932 | add = REMOVE_MANAGED_RESOURCE; |
1da177e4 | 933 | if (ret != 2) { |
9fea84f4 DB |
934 | ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr, |
935 | &end_addr); | |
22916638 | 936 | add = ADD_MANAGED_RESOURCE; |
1da177e4 LT |
937 | if (ret != 2) |
938 | return -EINVAL; | |
939 | } | |
940 | } | |
1146bc74 | 941 | if (end_addr < start_addr) |
1da177e4 LT |
942 | return -EINVAL; |
943 | ||
22916638 | 944 | ret = adjust_io(s, add, start_addr, end_addr); |
3c29976a DB |
945 | if (!ret) |
946 | s->resource_setup_new = 1; | |
1da177e4 LT |
947 | |
948 | return ret ? ret : count; | |
949 | } | |
87373318 | 950 | static DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db); |
1da177e4 | 951 | |
87373318 GKH |
952 | static ssize_t show_mem_db(struct device *dev, |
953 | struct device_attribute *attr, char *buf) | |
1da177e4 | 954 | { |
87373318 | 955 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4 LT |
956 | struct socket_data *data; |
957 | struct resource_map *p; | |
958 | ssize_t ret = 0; | |
959 | ||
7fe908dd | 960 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
961 | data = s->resource_data; |
962 | ||
963 | for (p = data->mem_db.next; p != &data->mem_db; p = p->next) { | |
964 | if (ret > (PAGE_SIZE - 10)) | |
965 | continue; | |
9fea84f4 DB |
966 | ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1), |
967 | "0x%08lx - 0x%08lx\n", | |
968 | ((unsigned long) p->base), | |
969 | ((unsigned long) p->base + p->num - 1)); | |
1da177e4 LT |
970 | } |
971 | ||
7fe908dd | 972 | mutex_unlock(&rsrc_mutex); |
9fea84f4 | 973 | return ret; |
1da177e4 LT |
974 | } |
975 | ||
87373318 GKH |
976 | static ssize_t store_mem_db(struct device *dev, |
977 | struct device_attribute *attr, | |
978 | const char *buf, size_t count) | |
1da177e4 | 979 | { |
87373318 | 980 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4 | 981 | unsigned long start_addr, end_addr; |
22916638 | 982 | unsigned int add = ADD_MANAGED_RESOURCE; |
1da177e4 LT |
983 | ssize_t ret = 0; |
984 | ||
9fea84f4 | 985 | ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr); |
1da177e4 | 986 | if (ret != 2) { |
9fea84f4 | 987 | ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr); |
22916638 | 988 | add = REMOVE_MANAGED_RESOURCE; |
1da177e4 | 989 | if (ret != 2) { |
9fea84f4 DB |
990 | ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr, |
991 | &end_addr); | |
22916638 | 992 | add = ADD_MANAGED_RESOURCE; |
1da177e4 LT |
993 | if (ret != 2) |
994 | return -EINVAL; | |
995 | } | |
996 | } | |
1146bc74 | 997 | if (end_addr < start_addr) |
1da177e4 LT |
998 | return -EINVAL; |
999 | ||
22916638 | 1000 | ret = adjust_memory(s, add, start_addr, end_addr); |
3c29976a DB |
1001 | if (!ret) |
1002 | s->resource_setup_new = 1; | |
1da177e4 LT |
1003 | |
1004 | return ret ? ret : count; | |
1005 | } | |
87373318 | 1006 | static DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db); |
1da177e4 | 1007 | |
7d578961 DB |
1008 | static struct attribute *pccard_rsrc_attributes[] = { |
1009 | &dev_attr_available_resources_io.attr, | |
1010 | &dev_attr_available_resources_mem.attr, | |
1da177e4 LT |
1011 | NULL, |
1012 | }; | |
1013 | ||
7d578961 DB |
1014 | static const struct attribute_group rsrc_attributes = { |
1015 | .attrs = pccard_rsrc_attributes, | |
1016 | }; | |
1017 | ||
87373318 | 1018 | static int __devinit pccard_sysfs_add_rsrc(struct device *dev, |
d8539d81 | 1019 | struct class_interface *class_intf) |
1da177e4 | 1020 | { |
87373318 | 1021 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
7d578961 | 1022 | |
1da177e4 LT |
1023 | if (s->resource_ops != &pccard_nonstatic_ops) |
1024 | return 0; | |
7d578961 | 1025 | return sysfs_create_group(&dev->kobj, &rsrc_attributes); |
1da177e4 LT |
1026 | } |
1027 | ||
87373318 | 1028 | static void __devexit pccard_sysfs_remove_rsrc(struct device *dev, |
d8539d81 | 1029 | struct class_interface *class_intf) |
1da177e4 | 1030 | { |
87373318 | 1031 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4 LT |
1032 | |
1033 | if (s->resource_ops != &pccard_nonstatic_ops) | |
1034 | return; | |
7d578961 | 1035 | sysfs_remove_group(&dev->kobj, &rsrc_attributes); |
1da177e4 LT |
1036 | } |
1037 | ||
ed49f5d0 | 1038 | static struct class_interface pccard_rsrc_interface __refdata = { |
1da177e4 | 1039 | .class = &pcmcia_socket_class, |
87373318 GKH |
1040 | .add_dev = &pccard_sysfs_add_rsrc, |
1041 | .remove_dev = __devexit_p(&pccard_sysfs_remove_rsrc), | |
1da177e4 LT |
1042 | }; |
1043 | ||
1044 | static int __init nonstatic_sysfs_init(void) | |
1045 | { | |
1046 | return class_interface_register(&pccard_rsrc_interface); | |
1047 | } | |
1048 | ||
1049 | static void __exit nonstatic_sysfs_exit(void) | |
1050 | { | |
1051 | class_interface_unregister(&pccard_rsrc_interface); | |
1052 | } | |
1053 | ||
1054 | module_init(nonstatic_sysfs_init); | |
1055 | module_exit(nonstatic_sysfs_exit); |