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); |
1da177e4 LT |
284 | /* invalidate mapping and CIS cache */ |
285 | iounmap(s->cis_virt); | |
286 | s->cis_virt = NULL; | |
287 | destroy_cis_cache(s); | |
288 | } | |
289 | s->cis_mem.res = NULL; | |
0e09c863 | 290 | if ((ret != 0) || (*count == 0)) |
1da177e4 LT |
291 | return 0; |
292 | return 1; | |
293 | } | |
294 | ||
295 | /* Validation function for simple memory cards */ | |
296 | static int checksum(struct pcmcia_socket *s, struct resource *res) | |
297 | { | |
298 | pccard_mem_map map; | |
299 | int i, a = 0, b = -1, d; | |
300 | void __iomem *virt; | |
301 | ||
302 | virt = ioremap(res->start, s->map_size); | |
303 | if (virt) { | |
304 | map.map = 0; | |
305 | map.flags = MAP_ACTIVE; | |
306 | map.speed = 0; | |
307 | map.res = res; | |
308 | map.card_start = 0; | |
309 | s->ops->set_mem_map(s, &map); | |
310 | ||
311 | /* Don't bother checking every word... */ | |
312 | for (i = 0; i < s->map_size; i += 44) { | |
313 | d = readl(virt+i); | |
314 | a += d; | |
315 | b &= d; | |
316 | } | |
317 | ||
318 | map.flags = 0; | |
319 | s->ops->set_mem_map(s, &map); | |
320 | ||
321 | iounmap(virt); | |
322 | } | |
323 | ||
324 | return (b == -1) ? -1 : (a>>1); | |
325 | } | |
326 | ||
327 | static int | |
328 | cis_readable(struct pcmcia_socket *s, unsigned long base, unsigned long size) | |
329 | { | |
330 | struct resource *res1, *res2; | |
c5081d5f | 331 | unsigned int info1, info2; |
1da177e4 LT |
332 | int ret = 0; |
333 | ||
9fea84f4 DB |
334 | res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe"); |
335 | res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, | |
336 | "PCMCIA memprobe"); | |
1da177e4 LT |
337 | |
338 | if (res1 && res2) { | |
339 | ret = readable(s, res1, &info1); | |
340 | ret += readable(s, res2, &info2); | |
341 | } | |
342 | ||
343 | free_region(res2); | |
344 | free_region(res1); | |
345 | ||
c5081d5f | 346 | return (ret == 2) && (info1 == info2); |
1da177e4 LT |
347 | } |
348 | ||
349 | static int | |
350 | checksum_match(struct pcmcia_socket *s, unsigned long base, unsigned long size) | |
351 | { | |
352 | struct resource *res1, *res2; | |
353 | int a = -1, b = -1; | |
354 | ||
9fea84f4 DB |
355 | res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe"); |
356 | res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, | |
357 | "PCMCIA memprobe"); | |
1da177e4 LT |
358 | |
359 | if (res1 && res2) { | |
360 | a = checksum(s, res1); | |
361 | b = checksum(s, res2); | |
362 | } | |
363 | ||
364 | free_region(res2); | |
365 | free_region(res1); | |
366 | ||
367 | return (a == b) && (a >= 0); | |
368 | } | |
369 | ||
370 | /*====================================================================== | |
371 | ||
372 | The memory probe. If the memory list includes a 64K-aligned block | |
373 | below 1MB, we probe in 64K chunks, and as soon as we accumulate at | |
374 | least mem_limit free space, we quit. | |
375 | ||
376 | ======================================================================*/ | |
377 | ||
378 | static int do_mem_probe(u_long base, u_long num, struct pcmcia_socket *s) | |
379 | { | |
9fea84f4 DB |
380 | struct socket_data *s_data = s->resource_data; |
381 | u_long i, j, bad, fail, step; | |
382 | ||
383 | dev_printk(KERN_INFO, &s->dev, "cs: memory probe 0x%06lx-0x%06lx:", | |
384 | base, base+num-1); | |
385 | bad = fail = 0; | |
386 | step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff); | |
387 | /* don't allow too large steps */ | |
388 | if (step > 0x800000) | |
389 | step = 0x800000; | |
390 | /* cis_readable wants to map 2x map_size */ | |
391 | if (step < 2 * s->map_size) | |
392 | step = 2 * s->map_size; | |
393 | for (i = j = base; i < base+num; i = j + step) { | |
394 | if (!fail) { | |
395 | for (j = i; j < base+num; j += step) { | |
396 | if (cis_readable(s, j, step)) | |
397 | break; | |
398 | } | |
399 | fail = ((i == base) && (j == base+num)); | |
400 | } | |
401 | if (fail) { | |
402 | for (j = i; j < base+num; j += 2*step) | |
403 | if (checksum_match(s, j, step) && | |
404 | checksum_match(s, j + step, step)) | |
405 | break; | |
406 | } | |
407 | if (i != j) { | |
408 | if (!bad) | |
409 | printk(" excluding"); | |
410 | printk(" %#05lx-%#05lx", i, j-1); | |
411 | sub_interval(&s_data->mem_db, i, j-i); | |
412 | bad += j-i; | |
413 | } | |
414 | } | |
415 | printk(bad ? "\n" : " clean.\n"); | |
416 | return num - bad; | |
1da177e4 LT |
417 | } |
418 | ||
419 | #ifdef CONFIG_PCMCIA_PROBE | |
420 | ||
421 | static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s) | |
422 | { | |
de75914e DB |
423 | struct socket_data *s_data = s->resource_data; |
424 | u_long ok; | |
425 | if (m == &s_data->mem_db) | |
426 | return 0; | |
427 | ok = inv_probe(m->next, s); | |
428 | if (ok) { | |
429 | if (m->base >= 0x100000) | |
430 | sub_interval(&s_data->mem_db, m->base, m->num); | |
431 | return ok; | |
432 | } | |
433 | if (m->base < 0x100000) | |
434 | return 0; | |
435 | return do_mem_probe(m->base, m->num, s); | |
1da177e4 LT |
436 | } |
437 | ||
de75914e | 438 | static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask) |
1da177e4 | 439 | { |
de75914e DB |
440 | struct resource_map *m, mm; |
441 | static unsigned char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 }; | |
442 | unsigned long b, i, ok = 0; | |
443 | struct socket_data *s_data = s->resource_data; | |
1da177e4 | 444 | |
de75914e DB |
445 | /* We do up to four passes through the list */ |
446 | if (probe_mask & MEM_PROBE_HIGH) { | |
447 | if (inv_probe(s_data->mem_db.next, s) > 0) | |
448 | return 0; | |
dbe4ea5f DB |
449 | dev_printk(KERN_NOTICE, &s->dev, |
450 | "cs: warning: no high memory space available!\n"); | |
de75914e | 451 | return -ENODEV; |
1da177e4 | 452 | } |
de75914e DB |
453 | |
454 | for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) { | |
455 | mm = *m; | |
456 | /* Only probe < 1 MB */ | |
457 | if (mm.base >= 0x100000) | |
458 | continue; | |
459 | if ((mm.base | mm.num) & 0xffff) { | |
460 | ok += do_mem_probe(mm.base, mm.num, s); | |
461 | continue; | |
462 | } | |
463 | /* Special probe for 64K-aligned block */ | |
464 | for (i = 0; i < 4; i++) { | |
465 | b = order[i] << 12; | |
466 | if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) { | |
467 | if (ok >= mem_limit) | |
468 | sub_interval(&s_data->mem_db, b, 0x10000); | |
469 | else | |
470 | ok += do_mem_probe(b, 0x10000, s); | |
471 | } | |
472 | } | |
1da177e4 | 473 | } |
de75914e DB |
474 | |
475 | if (ok > 0) | |
476 | return 0; | |
477 | ||
478 | return -ENODEV; | |
1da177e4 LT |
479 | } |
480 | ||
481 | #else /* CONFIG_PCMCIA_PROBE */ | |
482 | ||
2cff9447 | 483 | static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask) |
1da177e4 LT |
484 | { |
485 | struct resource_map *m, mm; | |
486 | struct socket_data *s_data = s->resource_data; | |
2cff9447 | 487 | unsigned long ok = 0; |
1da177e4 LT |
488 | |
489 | for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) { | |
490 | mm = *m; | |
2cff9447 | 491 | ok += do_mem_probe(mm.base, mm.num, s); |
1da177e4 | 492 | } |
2cff9447 AM |
493 | if (ok > 0) |
494 | return 0; | |
495 | return -ENODEV; | |
1da177e4 LT |
496 | } |
497 | ||
498 | #endif /* CONFIG_PCMCIA_PROBE */ | |
499 | ||
500 | ||
501 | /* | |
7fe908dd | 502 | * Locking note: Must be called with skt_mutex held! |
1da177e4 | 503 | */ |
de75914e | 504 | static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s) |
1da177e4 LT |
505 | { |
506 | struct socket_data *s_data = s->resource_data; | |
de75914e DB |
507 | unsigned int probe_mask = MEM_PROBE_LOW; |
508 | int ret = 0; | |
509 | ||
510 | if (!probe_mem) | |
511 | return 0; | |
1da177e4 | 512 | |
7fe908dd | 513 | mutex_lock(&rsrc_mutex); |
1da177e4 | 514 | |
de75914e DB |
515 | if (s->features & SS_CAP_PAGE_REGS) |
516 | probe_mask = MEM_PROBE_HIGH; | |
1da177e4 | 517 | |
de75914e DB |
518 | if (probe_mask & ~s_data->rsrc_mem_probe) { |
519 | if (s->state & SOCKET_PRESENT) | |
520 | ret = validate_mem(s, probe_mask); | |
521 | if (!ret) | |
1da177e4 | 522 | s_data->rsrc_mem_probe |= probe_mask; |
de75914e | 523 | } |
1da177e4 | 524 | |
7fe908dd | 525 | mutex_unlock(&rsrc_mutex); |
1da177e4 | 526 | |
de75914e | 527 | return ret; |
1da177e4 LT |
528 | } |
529 | ||
530 | struct pcmcia_align_data { | |
531 | unsigned long mask; | |
532 | unsigned long offset; | |
533 | struct resource_map *map; | |
534 | }; | |
535 | ||
b26b2d49 | 536 | static resource_size_t |
1da177e4 | 537 | pcmcia_common_align(void *align_data, struct resource *res, |
2427ddd8 | 538 | resource_size_t size, resource_size_t align) |
1da177e4 LT |
539 | { |
540 | struct pcmcia_align_data *data = align_data; | |
2427ddd8 | 541 | resource_size_t start; |
1da177e4 LT |
542 | /* |
543 | * Ensure that we have the correct start address | |
544 | */ | |
545 | start = (res->start & ~data->mask) + data->offset; | |
546 | if (start < res->start) | |
547 | start += data->mask + 1; | |
b26b2d49 | 548 | return start; |
1da177e4 LT |
549 | } |
550 | ||
b26b2d49 | 551 | static resource_size_t |
2427ddd8 GKH |
552 | pcmcia_align(void *align_data, struct resource *res, resource_size_t size, |
553 | resource_size_t align) | |
1da177e4 LT |
554 | { |
555 | struct pcmcia_align_data *data = align_data; | |
556 | struct resource_map *m; | |
b26b2d49 | 557 | resource_size_t start; |
1da177e4 | 558 | |
b26b2d49 | 559 | start = pcmcia_common_align(data, res, size, align); |
1da177e4 LT |
560 | |
561 | for (m = data->map->next; m != data->map; m = m->next) { | |
562 | unsigned long start = m->base; | |
563 | unsigned long end = m->base + m->num - 1; | |
564 | ||
565 | /* | |
566 | * If the lower resources are not available, try aligning | |
567 | * to this entry of the resource database to see if it'll | |
568 | * fit here. | |
569 | */ | |
570 | if (res->start < start) { | |
b26b2d49 | 571 | start = pcmcia_common_align(data, res, size, align); |
1da177e4 LT |
572 | } |
573 | ||
574 | /* | |
575 | * If we're above the area which was passed in, there's | |
576 | * no point proceeding. | |
577 | */ | |
578 | if (res->start >= res->end) | |
579 | break; | |
580 | ||
581 | if ((res->start + size - 1) <= end) | |
582 | break; | |
583 | } | |
584 | ||
585 | /* | |
586 | * If we failed to find something suitable, ensure we fail. | |
587 | */ | |
588 | if (m == data->map) | |
b26b2d49 DB |
589 | start = res->end; |
590 | ||
591 | return start; | |
1da177e4 LT |
592 | } |
593 | ||
594 | /* | |
595 | * Adjust an existing IO region allocation, but making sure that we don't | |
596 | * encroach outside the resources which the user supplied. | |
597 | */ | |
598 | static int nonstatic_adjust_io_region(struct resource *res, unsigned long r_start, | |
599 | unsigned long r_end, struct pcmcia_socket *s) | |
600 | { | |
601 | struct resource_map *m; | |
602 | struct socket_data *s_data = s->resource_data; | |
603 | int ret = -ENOMEM; | |
604 | ||
7fe908dd | 605 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
606 | for (m = s_data->io_db.next; m != &s_data->io_db; m = m->next) { |
607 | unsigned long start = m->base; | |
608 | unsigned long end = m->base + m->num - 1; | |
609 | ||
610 | if (start > r_start || r_end > end) | |
611 | continue; | |
612 | ||
613 | ret = adjust_resource(res, r_start, r_end - r_start + 1); | |
614 | break; | |
615 | } | |
7fe908dd | 616 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
617 | |
618 | return ret; | |
619 | } | |
620 | ||
621 | /*====================================================================== | |
622 | ||
623 | These find ranges of I/O ports or memory addresses that are not | |
624 | currently allocated by other devices. | |
625 | ||
626 | The 'align' field should reflect the number of bits of address | |
627 | that need to be preserved from the initial value of *base. It | |
628 | should be a power of two, greater than or equal to 'num'. A value | |
629 | of 0 means that all bits of *base are significant. *base should | |
630 | also be strictly less than 'align'. | |
631 | ||
632 | ======================================================================*/ | |
633 | ||
e94e15f7 | 634 | static struct resource *nonstatic_find_io_region(unsigned long base, int num, |
1da177e4 LT |
635 | unsigned long align, struct pcmcia_socket *s) |
636 | { | |
25096986 | 637 | struct resource *res = make_resource(0, num, IORESOURCE_IO, dev_name(&s->dev)); |
1da177e4 LT |
638 | struct socket_data *s_data = s->resource_data; |
639 | struct pcmcia_align_data data; | |
640 | unsigned long min = base; | |
641 | int ret; | |
642 | ||
643 | if (align == 0) | |
644 | align = 0x10000; | |
645 | ||
646 | data.mask = align - 1; | |
647 | data.offset = base & data.mask; | |
648 | data.map = &s_data->io_db; | |
649 | ||
7fe908dd | 650 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
651 | #ifdef CONFIG_PCI |
652 | if (s->cb_dev) { | |
653 | ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1, | |
654 | min, 0, pcmcia_align, &data); | |
655 | } else | |
656 | #endif | |
657 | ret = allocate_resource(&ioport_resource, res, num, min, ~0UL, | |
658 | 1, pcmcia_align, &data); | |
7fe908dd | 659 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
660 | |
661 | if (ret != 0) { | |
662 | kfree(res); | |
663 | res = NULL; | |
664 | } | |
665 | return res; | |
666 | } | |
667 | ||
9fea84f4 | 668 | static struct resource *nonstatic_find_mem_region(u_long base, u_long num, |
e94e15f7 | 669 | u_long align, int low, struct pcmcia_socket *s) |
1da177e4 | 670 | { |
25096986 | 671 | struct resource *res = make_resource(0, num, IORESOURCE_MEM, dev_name(&s->dev)); |
1da177e4 LT |
672 | struct socket_data *s_data = s->resource_data; |
673 | struct pcmcia_align_data data; | |
674 | unsigned long min, max; | |
675 | int ret, i; | |
676 | ||
677 | low = low || !(s->features & SS_CAP_PAGE_REGS); | |
678 | ||
679 | data.mask = align - 1; | |
680 | data.offset = base & data.mask; | |
681 | data.map = &s_data->mem_db; | |
682 | ||
683 | for (i = 0; i < 2; i++) { | |
684 | if (low) { | |
685 | max = 0x100000UL; | |
686 | min = base < max ? base : 0; | |
687 | } else { | |
688 | max = ~0UL; | |
689 | min = 0x100000UL + base; | |
690 | } | |
691 | ||
7fe908dd | 692 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
693 | #ifdef CONFIG_PCI |
694 | if (s->cb_dev) { | |
695 | ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, | |
696 | 1, min, 0, | |
697 | pcmcia_align, &data); | |
698 | } else | |
699 | #endif | |
700 | ret = allocate_resource(&iomem_resource, res, num, min, | |
701 | max, 1, pcmcia_align, &data); | |
7fe908dd | 702 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
703 | if (ret == 0 || low) |
704 | break; | |
705 | low = 1; | |
706 | } | |
707 | ||
708 | if (ret != 0) { | |
709 | kfree(res); | |
710 | res = NULL; | |
711 | } | |
712 | return res; | |
713 | } | |
714 | ||
715 | ||
22916638 | 716 | static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end) |
1da177e4 | 717 | { |
1da177e4 | 718 | struct socket_data *data = s->resource_data; |
22916638 DB |
719 | unsigned long size = end - start + 1; |
720 | int ret = 0; | |
1da177e4 | 721 | |
1146bc74 | 722 | if (end < start) |
22916638 | 723 | return -EINVAL; |
1da177e4 | 724 | |
7fe908dd | 725 | mutex_lock(&rsrc_mutex); |
22916638 | 726 | switch (action) { |
1da177e4 | 727 | case ADD_MANAGED_RESOURCE: |
22916638 | 728 | ret = add_interval(&data->mem_db, start, size); |
1da177e4 LT |
729 | break; |
730 | case REMOVE_MANAGED_RESOURCE: | |
22916638 DB |
731 | ret = sub_interval(&data->mem_db, start, size); |
732 | if (!ret) { | |
1da177e4 LT |
733 | struct pcmcia_socket *socket; |
734 | down_read(&pcmcia_socket_list_rwsem); | |
735 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) | |
736 | release_cis_mem(socket); | |
737 | up_read(&pcmcia_socket_list_rwsem); | |
738 | } | |
739 | break; | |
740 | default: | |
22916638 | 741 | ret = -EINVAL; |
1da177e4 | 742 | } |
7fe908dd | 743 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
744 | |
745 | return ret; | |
746 | } | |
747 | ||
748 | ||
22916638 | 749 | static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end) |
1da177e4 LT |
750 | { |
751 | struct socket_data *data = s->resource_data; | |
22916638 DB |
752 | unsigned long size = end - start + 1; |
753 | int ret = 0; | |
1da177e4 | 754 | |
1146bc74 | 755 | if (end < start) |
22916638 DB |
756 | return -EINVAL; |
757 | ||
758 | if (end > IO_SPACE_LIMIT) | |
759 | return -EINVAL; | |
1da177e4 | 760 | |
7fe908dd | 761 | mutex_lock(&rsrc_mutex); |
22916638 | 762 | switch (action) { |
1da177e4 | 763 | case ADD_MANAGED_RESOURCE: |
22916638 DB |
764 | if (add_interval(&data->io_db, start, size) != 0) { |
765 | ret = -EBUSY; | |
1da177e4 LT |
766 | break; |
767 | } | |
768 | #ifdef CONFIG_PCMCIA_PROBE | |
769 | if (probe_io) | |
22916638 | 770 | do_io_probe(s, start, size); |
1da177e4 LT |
771 | #endif |
772 | break; | |
773 | case REMOVE_MANAGED_RESOURCE: | |
22916638 | 774 | sub_interval(&data->io_db, start, size); |
1da177e4 LT |
775 | break; |
776 | default: | |
22916638 | 777 | ret = -EINVAL; |
1da177e4 LT |
778 | break; |
779 | } | |
7fe908dd | 780 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
781 | |
782 | return ret; | |
783 | } | |
784 | ||
785 | ||
3c29976a DB |
786 | #ifdef CONFIG_PCI |
787 | static int nonstatic_autoadd_resources(struct pcmcia_socket *s) | |
788 | { | |
789 | struct resource *res; | |
790 | int i, done = 0; | |
791 | ||
792 | if (!s->cb_dev || !s->cb_dev->bus) | |
793 | return -ENODEV; | |
794 | ||
0d078f6f | 795 | #if defined(CONFIG_X86) |
b6d00f0d DB |
796 | /* If this is the root bus, the risk of hitting |
797 | * some strange system devices which aren't protected | |
798 | * by either ACPI resource tables or properly requested | |
799 | * resources is too big. Therefore, don't do auto-adding | |
800 | * of resources at the moment. | |
801 | */ | |
802 | if (s->cb_dev->bus->number == 0) | |
803 | return -EINVAL; | |
804 | #endif | |
805 | ||
9fea84f4 | 806 | for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { |
3c29976a DB |
807 | res = s->cb_dev->bus->resource[i]; |
808 | if (!res) | |
809 | continue; | |
810 | ||
811 | if (res->flags & IORESOURCE_IO) { | |
812 | if (res == &ioport_resource) | |
813 | continue; | |
dbe4ea5f DB |
814 | dev_printk(KERN_INFO, &s->cb_dev->dev, |
815 | "pcmcia: parent PCI bridge I/O " | |
816 | "window: 0x%llx - 0x%llx\n", | |
817 | (unsigned long long)res->start, | |
818 | (unsigned long long)res->end); | |
3c29976a DB |
819 | if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end)) |
820 | done |= IORESOURCE_IO; | |
821 | ||
822 | } | |
823 | ||
824 | if (res->flags & IORESOURCE_MEM) { | |
825 | if (res == &iomem_resource) | |
826 | continue; | |
dbe4ea5f DB |
827 | dev_printk(KERN_INFO, &s->cb_dev->dev, |
828 | "pcmcia: parent PCI bridge Memory " | |
829 | "window: 0x%llx - 0x%llx\n", | |
830 | (unsigned long long)res->start, | |
831 | (unsigned long long)res->end); | |
3c29976a DB |
832 | if (!adjust_memory(s, ADD_MANAGED_RESOURCE, res->start, res->end)) |
833 | done |= IORESOURCE_MEM; | |
834 | } | |
835 | } | |
836 | ||
837 | /* if we got at least one of IO, and one of MEM, we can be glad and | |
838 | * activate the PCMCIA subsystem */ | |
54bb5675 | 839 | if (done == (IORESOURCE_MEM | IORESOURCE_IO)) |
3c29976a DB |
840 | s->resource_setup_done = 1; |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | #else | |
846 | ||
847 | static inline int nonstatic_autoadd_resources(struct pcmcia_socket *s) | |
848 | { | |
849 | return -ENODEV; | |
850 | } | |
851 | ||
852 | #endif | |
853 | ||
854 | ||
1da177e4 LT |
855 | static int nonstatic_init(struct pcmcia_socket *s) |
856 | { | |
857 | struct socket_data *data; | |
858 | ||
8084b372 | 859 | data = kzalloc(sizeof(struct socket_data), GFP_KERNEL); |
1da177e4 LT |
860 | if (!data) |
861 | return -ENOMEM; | |
1da177e4 LT |
862 | |
863 | data->mem_db.next = &data->mem_db; | |
864 | data->io_db.next = &data->io_db; | |
865 | ||
866 | s->resource_data = (void *) data; | |
867 | ||
3c29976a DB |
868 | nonstatic_autoadd_resources(s); |
869 | ||
1da177e4 LT |
870 | return 0; |
871 | } | |
872 | ||
873 | static void nonstatic_release_resource_db(struct pcmcia_socket *s) | |
874 | { | |
875 | struct socket_data *data = s->resource_data; | |
876 | struct resource_map *p, *q; | |
877 | ||
7fe908dd | 878 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
879 | for (p = data->mem_db.next; p != &data->mem_db; p = q) { |
880 | q = p->next; | |
881 | kfree(p); | |
882 | } | |
883 | for (p = data->io_db.next; p != &data->io_db; p = q) { | |
884 | q = p->next; | |
885 | kfree(p); | |
886 | } | |
7fe908dd | 887 | mutex_unlock(&rsrc_mutex); |
1da177e4 LT |
888 | } |
889 | ||
890 | ||
891 | struct pccard_resource_ops pccard_nonstatic_ops = { | |
892 | .validate_mem = pcmcia_nonstatic_validate_mem, | |
893 | .adjust_io_region = nonstatic_adjust_io_region, | |
894 | .find_io = nonstatic_find_io_region, | |
895 | .find_mem = nonstatic_find_mem_region, | |
c5023801 DB |
896 | .add_io = adjust_io, |
897 | .add_mem = adjust_memory, | |
1da177e4 LT |
898 | .init = nonstatic_init, |
899 | .exit = nonstatic_release_resource_db, | |
900 | }; | |
901 | EXPORT_SYMBOL(pccard_nonstatic_ops); | |
902 | ||
903 | ||
904 | /* sysfs interface to the resource database */ | |
905 | ||
87373318 GKH |
906 | static ssize_t show_io_db(struct device *dev, |
907 | struct device_attribute *attr, char *buf) | |
1da177e4 | 908 | { |
87373318 | 909 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4 LT |
910 | struct socket_data *data; |
911 | struct resource_map *p; | |
912 | ssize_t ret = 0; | |
913 | ||
7fe908dd | 914 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
915 | data = s->resource_data; |
916 | ||
917 | for (p = data->io_db.next; p != &data->io_db; p = p->next) { | |
918 | if (ret > (PAGE_SIZE - 10)) | |
919 | continue; | |
9fea84f4 DB |
920 | ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1), |
921 | "0x%08lx - 0x%08lx\n", | |
922 | ((unsigned long) p->base), | |
923 | ((unsigned long) p->base + p->num - 1)); | |
1da177e4 LT |
924 | } |
925 | ||
7fe908dd | 926 | mutex_unlock(&rsrc_mutex); |
9fea84f4 | 927 | return ret; |
1da177e4 LT |
928 | } |
929 | ||
87373318 GKH |
930 | static ssize_t store_io_db(struct device *dev, |
931 | struct device_attribute *attr, | |
932 | const char *buf, size_t count) | |
1da177e4 | 933 | { |
87373318 | 934 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4 | 935 | unsigned long start_addr, end_addr; |
22916638 | 936 | unsigned int add = ADD_MANAGED_RESOURCE; |
1da177e4 LT |
937 | ssize_t ret = 0; |
938 | ||
9fea84f4 | 939 | ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr); |
1da177e4 | 940 | if (ret != 2) { |
9fea84f4 | 941 | ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr); |
22916638 | 942 | add = REMOVE_MANAGED_RESOURCE; |
1da177e4 | 943 | if (ret != 2) { |
9fea84f4 DB |
944 | ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr, |
945 | &end_addr); | |
22916638 | 946 | add = ADD_MANAGED_RESOURCE; |
1da177e4 LT |
947 | if (ret != 2) |
948 | return -EINVAL; | |
949 | } | |
950 | } | |
1146bc74 | 951 | if (end_addr < start_addr) |
1da177e4 LT |
952 | return -EINVAL; |
953 | ||
22916638 | 954 | ret = adjust_io(s, add, start_addr, end_addr); |
3c29976a DB |
955 | if (!ret) |
956 | s->resource_setup_new = 1; | |
1da177e4 LT |
957 | |
958 | return ret ? ret : count; | |
959 | } | |
87373318 | 960 | static DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db); |
1da177e4 | 961 | |
87373318 GKH |
962 | static ssize_t show_mem_db(struct device *dev, |
963 | struct device_attribute *attr, char *buf) | |
1da177e4 | 964 | { |
87373318 | 965 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4 LT |
966 | struct socket_data *data; |
967 | struct resource_map *p; | |
968 | ssize_t ret = 0; | |
969 | ||
7fe908dd | 970 | mutex_lock(&rsrc_mutex); |
1da177e4 LT |
971 | data = s->resource_data; |
972 | ||
973 | for (p = data->mem_db.next; p != &data->mem_db; p = p->next) { | |
974 | if (ret > (PAGE_SIZE - 10)) | |
975 | continue; | |
9fea84f4 DB |
976 | ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1), |
977 | "0x%08lx - 0x%08lx\n", | |
978 | ((unsigned long) p->base), | |
979 | ((unsigned long) p->base + p->num - 1)); | |
1da177e4 LT |
980 | } |
981 | ||
7fe908dd | 982 | mutex_unlock(&rsrc_mutex); |
9fea84f4 | 983 | return ret; |
1da177e4 LT |
984 | } |
985 | ||
87373318 GKH |
986 | static ssize_t store_mem_db(struct device *dev, |
987 | struct device_attribute *attr, | |
988 | const char *buf, size_t count) | |
1da177e4 | 989 | { |
87373318 | 990 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4 | 991 | unsigned long start_addr, end_addr; |
22916638 | 992 | unsigned int add = ADD_MANAGED_RESOURCE; |
1da177e4 LT |
993 | ssize_t ret = 0; |
994 | ||
9fea84f4 | 995 | ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr); |
1da177e4 | 996 | if (ret != 2) { |
9fea84f4 | 997 | ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr); |
22916638 | 998 | add = REMOVE_MANAGED_RESOURCE; |
1da177e4 | 999 | if (ret != 2) { |
9fea84f4 DB |
1000 | ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr, |
1001 | &end_addr); | |
22916638 | 1002 | add = ADD_MANAGED_RESOURCE; |
1da177e4 LT |
1003 | if (ret != 2) |
1004 | return -EINVAL; | |
1005 | } | |
1006 | } | |
1146bc74 | 1007 | if (end_addr < start_addr) |
1da177e4 LT |
1008 | return -EINVAL; |
1009 | ||
22916638 | 1010 | ret = adjust_memory(s, add, start_addr, end_addr); |
3c29976a DB |
1011 | if (!ret) |
1012 | s->resource_setup_new = 1; | |
1da177e4 LT |
1013 | |
1014 | return ret ? ret : count; | |
1015 | } | |
87373318 | 1016 | static DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db); |
1da177e4 | 1017 | |
7d578961 DB |
1018 | static struct attribute *pccard_rsrc_attributes[] = { |
1019 | &dev_attr_available_resources_io.attr, | |
1020 | &dev_attr_available_resources_mem.attr, | |
1da177e4 LT |
1021 | NULL, |
1022 | }; | |
1023 | ||
7d578961 DB |
1024 | static const struct attribute_group rsrc_attributes = { |
1025 | .attrs = pccard_rsrc_attributes, | |
1026 | }; | |
1027 | ||
87373318 | 1028 | static int __devinit pccard_sysfs_add_rsrc(struct device *dev, |
d8539d81 | 1029 | struct class_interface *class_intf) |
1da177e4 | 1030 | { |
87373318 | 1031 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
7d578961 | 1032 | |
1da177e4 LT |
1033 | if (s->resource_ops != &pccard_nonstatic_ops) |
1034 | return 0; | |
7d578961 | 1035 | return sysfs_create_group(&dev->kobj, &rsrc_attributes); |
1da177e4 LT |
1036 | } |
1037 | ||
87373318 | 1038 | static void __devexit pccard_sysfs_remove_rsrc(struct device *dev, |
d8539d81 | 1039 | struct class_interface *class_intf) |
1da177e4 | 1040 | { |
87373318 | 1041 | struct pcmcia_socket *s = dev_get_drvdata(dev); |
1da177e4 LT |
1042 | |
1043 | if (s->resource_ops != &pccard_nonstatic_ops) | |
1044 | return; | |
7d578961 | 1045 | sysfs_remove_group(&dev->kobj, &rsrc_attributes); |
1da177e4 LT |
1046 | } |
1047 | ||
ed49f5d0 | 1048 | static struct class_interface pccard_rsrc_interface __refdata = { |
1da177e4 | 1049 | .class = &pcmcia_socket_class, |
87373318 GKH |
1050 | .add_dev = &pccard_sysfs_add_rsrc, |
1051 | .remove_dev = __devexit_p(&pccard_sysfs_remove_rsrc), | |
1da177e4 LT |
1052 | }; |
1053 | ||
1054 | static int __init nonstatic_sysfs_init(void) | |
1055 | { | |
1056 | return class_interface_register(&pccard_rsrc_interface); | |
1057 | } | |
1058 | ||
1059 | static void __exit nonstatic_sysfs_exit(void) | |
1060 | { | |
1061 | class_interface_unregister(&pccard_rsrc_interface); | |
1062 | } | |
1063 | ||
1064 | module_init(nonstatic_sysfs_init); | |
1065 | module_exit(nonstatic_sysfs_exit); |