drivers/pcmcia/rsrc_nonstatic.c

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