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
  28 #include <asm/irq.h>
  29 #include <asm/io.h>
  30
  31 #include <pcmcia/cs_types.h>
  32 #include <pcmcia/ss.h>
  33 #include <pcmcia/cs.h>
  34 #include <pcmcia/bulkmem.h>
  35 #include <pcmcia/cistpl.h>
  36 #include "cs_internal.h"
  37
  38 MODULE_AUTHOR("David A. Hinds, Dominik Brodowski");
  39 MODULE_LICENSE("GPL");
  40
  41 /* Parameters that can be set with 'insmod' */
  42
  43 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
  44
  45 INT_MODULE_PARM(probe_mem,      1);             /* memory probe? */
  46 #ifdef CONFIG_PCMCIA_PROBE
  47 INT_MODULE_PARM(probe_io,       1);             /* IO port probe? */
  48 INT_MODULE_PARM(mem_limit,      0x10000);
  49 #endif
  50
  51 /* for io_db and mem_db */
  52 struct resource_map {
  53         u_long                  base, num;
  54         struct resource_map     *next;
  55 };
  56
  57 struct socket_data {
  58         struct resource_map             mem_db;
  59         struct resource_map             io_db;
  60         unsigned int                    rsrc_mem_probe;
  61 };
  62
  63 static DEFINE_MUTEX(rsrc_mutex);
  64 #define MEM_PROBE_LOW   (1 << 0)
  65 #define MEM_PROBE_HIGH  (1 << 1)
  66
  67
  68 /*======================================================================
  69
  70     Linux resource management extensions
  71
  72 ======================================================================*/
  73
  74 static struct resource *
  75 make_resource(resource_size_t b, resource_size_t n, int flags, char *name)
  76 {
  77         struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
  78
  79         if (res) {
  80                 res->name = name;
  81                 res->start = b;
  82                 res->end = b + n - 1;
  83                 res->flags = flags;
  84         }
  85         return res;
  86 }
  87
  88 static struct resource *
  89 claim_region(struct pcmcia_socket *s, resource_size_t base,
  90                 resource_size_t size, int type, char *name)
  91 {
  92         struct resource *res, *parent;
  93
  94         parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource;
  95         res = make_resource(base, size, type | IORESOURCE_BUSY, name);
  96
  97         if (res) {
  98 #ifdef CONFIG_PCI
  99                 if (s && s->cb_dev)
 100                         parent = pci_find_parent_resource(s->cb_dev, res);
 101 #endif
 102                 if (!parent || request_resource(parent, res)) {
 103                         kfree(res);
 104                         res = NULL;
 105                 }
 106         }
 107         return res;
 108 }
 109
 110 static void free_region(struct resource *res)
 111 {
 112         if (res) {
 113                 release_resource(res);
 114                 kfree(res);
 115         }
 116 }
 117
 118 /*======================================================================
 119
 120     These manage the internal databases of available resources.
 121
 122 ======================================================================*/
 123
 124 static int add_interval(struct resource_map *map, u_long base, u_long num)
 125 {
 126     struct resource_map *p, *q;
 127
 128     for (p = map; ; p = p->next) {
 129         if ((p != map) && (p->base+p->num-1 >= base))
 130             return -1;
 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) return CS_OUT_OF_RESOURCE;
 136     q->base = base; q->num = num;
 137     q->next = p->next; p->next = q;
 138     return CS_SUCCESS;
 139 }
 140
 141 /*====================================================================*/
 142
 143 static int sub_interval(struct resource_map *map, u_long base, u_long num)
 144 {
 145     struct resource_map *p, *q;
 146
 147     for (p = map; ; p = q) {
 148         q = p->next;
 149         if (q == map)
 150             break;
 151         if ((q->base+q->num > base) && (base+num > q->base)) {
 152             if (q->base >= base) {
 153                 if (q->base+q->num <= base+num) {
 154                     /* Delete whole block */
 155                     p->next = q->next;
 156                     kfree(q);
 157                     /* don't advance the pointer yet */
 158                     q = p;
 159                 } else {
 160                     /* Cut off bit from the front */
 161                     q->num = q->base + q->num - base - num;
 162                     q->base = base + num;
 163                 }
 164             } else if (q->base+q->num <= base+num) {
 165                 /* Cut off bit from the end */
 166                 q->num = base - q->base;
 167             } else {
 168                 /* Split the block into two pieces */
 169                 p = kmalloc(sizeof(struct resource_map), GFP_KERNEL);
 170                 if (!p) return CS_OUT_OF_RESOURCE;
 171                 p->base = base+num;
 172                 p->num = q->base+q->num - p->base;
 173                 q->num = base - q->base;
 174                 p->next = q->next ; q->next = p;
 175             }
 176         }
 177     }
 178     return CS_SUCCESS;
 179 }
 180
 181 /*======================================================================
 182
 183     These routines examine a region of IO or memory addresses to
 184     determine what ranges might be genuinely available.
 185
 186 ======================================================================*/
 187
 188 #ifdef CONFIG_PCMCIA_PROBE
 189 static void do_io_probe(struct pcmcia_socket *s, unsigned int base,
 190                         unsigned int num)
 191 {
 192     struct resource *res;
 193     struct socket_data *s_data = s->resource_data;
 194     unsigned int i, j, bad;
 195     int any;
 196     u_char *b, hole, most;
 197
 198     printk(KERN_INFO "cs: IO port probe %#x-%#x:",
 199            base, base+num-1);
 200
 201     /* First, what does a floating port look like? */
 202     b = kzalloc(256, GFP_KERNEL);
 203     if (!b) {
 204             printk(KERN_ERR "do_io_probe: unable to kmalloc 256 bytes");
 205             return;
 206     }
 207     for (i = base, most = 0; i < base+num; i += 8) {
 208         res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA IO probe");
 209         if (!res)
 210             continue;
 211         hole = inb(i);
 212         for (j = 1; j < 8; j++)
 213             if (inb(i+j) != hole) break;
 214         free_region(res);
 215         if ((j == 8) && (++b[hole] > b[most]))
 216             most = hole;
 217         if (b[most] == 127) break;
 218     }
 219     kfree(b);
 220
 221     bad = any = 0;
 222     for (i = base; i < base+num; i += 8) {
 223         res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA IO probe");
 224         if (!res)
 225             continue;
 226         for (j = 0; j < 8; j++)
 227             if (inb(i+j) != most) break;
 228         free_region(res);
 229         if (j < 8) {
 230             if (!any)
 231                 printk(" excluding");
 232             if (!bad)
 233                 bad = any = i;
 234         } else {
 235             if (bad) {
 236                 sub_interval(&s_data->io_db, bad, i-bad);
 237                 printk(" %#x-%#x", bad, i-1);
 238                 bad = 0;
 239             }
 240         }
 241     }
 242     if (bad) {
 243         if ((num > 16) && (bad == base) && (i == base+num)) {
 244             printk(" nothing: probe failed.\n");
 245             return;
 246         } else {
 247             sub_interval(&s_data->io_db, bad, i-bad);
 248             printk(" %#x-%#x", bad, i-1);
 249         }
 250     }
 251
 252     printk(any ? "\n" : " clean.\n");
 253 }
 254 #endif
 255
 256 /*======================================================================
 257
 258     This is tricky... when we set up CIS memory, we try to validate
 259     the memory window space allocations.
 260
 261 ======================================================================*/
 262
 263 /* Validation function for cards with a valid CIS */
 264 static int readable(struct pcmcia_socket *s, struct resource *res, cisinfo_t *info)
 265 {
 266         int ret = -1;
 267
 268         s->cis_mem.res = res;
 269         s->cis_virt = ioremap(res->start, s->map_size);
 270         if (s->cis_virt) {
 271                 ret = pccard_validate_cis(s, BIND_FN_ALL, info);
 272                 /* invalidate mapping and CIS cache */
 273                 iounmap(s->cis_virt);
 274                 s->cis_virt = NULL;
 275                 destroy_cis_cache(s);
 276         }
 277         s->cis_mem.res = NULL;
 278         if ((ret != 0) || (info->Chains == 0))
 279                 return 0;
 280         return 1;
 281 }
 282
 283 /* Validation function for simple memory cards */
 284 static int checksum(struct pcmcia_socket *s, struct resource *res)
 285 {
 286         pccard_mem_map map;
 287         int i, a = 0, b = -1, d;
 288         void __iomem *virt;
 289
 290         virt = ioremap(res->start, s->map_size);
 291         if (virt) {
 292                 map.map = 0;
 293                 map.flags = MAP_ACTIVE;
 294                 map.speed = 0;
 295                 map.res = res;
 296                 map.card_start = 0;
 297                 s->ops->set_mem_map(s, &map);
 298
 299                 /* Don't bother checking every word... */
 300                 for (i = 0; i < s->map_size; i += 44) {
 301                         d = readl(virt+i);
 302                         a += d;
 303                         b &= d;
 304                 }
 305
 306                 map.flags = 0;
 307                 s->ops->set_mem_map(s, &map);
 308
 309                 iounmap(virt);
 310         }
 311
 312         return (b == -1) ? -1 : (a>>1);
 313 }
 314
 315 static int
 316 cis_readable(struct pcmcia_socket *s, unsigned long base, unsigned long size)
 317 {
 318         struct resource *res1, *res2;
 319         cisinfo_t info1, info2;
 320         int ret = 0;
 321
 322         res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "cs memory probe");
 323         res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "cs memory probe");
 324
 325         if (res1 && res2) {
 326                 ret = readable(s, res1, &info1);
 327                 ret += readable(s, res2, &info2);
 328         }
 329
 330         free_region(res2);
 331         free_region(res1);
 332
 333         return (ret == 2) && (info1.Chains == info2.Chains);
 334 }
 335
 336 static int
 337 checksum_match(struct pcmcia_socket *s, unsigned long base, unsigned long size)
 338 {
 339         struct resource *res1, *res2;
 340         int a = -1, b = -1;
 341
 342         res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "cs memory probe");
 343         res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM, "cs memory probe");
 344
 345         if (res1 && res2) {
 346                 a = checksum(s, res1);
 347                 b = checksum(s, res2);
 348         }
 349
 350         free_region(res2);
 351         free_region(res1);
 352
 353         return (a == b) && (a >= 0);
 354 }
 355
 356 /*======================================================================
 357
 358     The memory probe.  If the memory list includes a 64K-aligned block
 359     below 1MB, we probe in 64K chunks, and as soon as we accumulate at
 360     least mem_limit free space, we quit.
 361
 362 ======================================================================*/
 363
 364 static int do_mem_probe(u_long base, u_long num, struct pcmcia_socket *s)
 365 {
 366     struct socket_data *s_data = s->resource_data;
 367     u_long i, j, bad, fail, step;
 368
 369     printk(KERN_INFO "cs: memory probe 0x%06lx-0x%06lx:",
 370            base, base+num-1);
 371     bad = fail = 0;
 372     step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff);
 373     /* don't allow too large steps */
 374     if (step > 0x800000)
 375         step = 0x800000;
 376     /* cis_readable wants to map 2x map_size */
 377     if (step < 2 * s->map_size)
 378         step = 2 * s->map_size;
 379     for (i = j = base; i < base+num; i = j + step) {
 380         if (!fail) {
 381             for (j = i; j < base+num; j += step) {
 382                 if (cis_readable(s, j, step))
 383                     break;
 384             }
 385             fail = ((i == base) && (j == base+num));
 386         }
 387         if (fail) {
 388             for (j = i; j < base+num; j += 2*step)
 389                 if (checksum_match(s, j, step) &&
 390                     checksum_match(s, j + step, step))
 391                     break;
 392         }
 393         if (i != j) {
 394             if (!bad) printk(" excluding");
 395             printk(" %#05lx-%#05lx", i, j-1);
 396             sub_interval(&s_data->mem_db, i, j-i);
 397             bad += j-i;
 398         }
 399     }
 400     printk(bad ? "\n" : " clean.\n");
 401     return (num - bad);
 402 }
 403
 404 #ifdef CONFIG_PCMCIA_PROBE
 405
 406 static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s)
 407 {
 408         struct socket_data *s_data = s->resource_data;
 409         u_long ok;
 410         if (m == &s_data->mem_db)
 411                 return 0;
 412         ok = inv_probe(m->next, s);
 413         if (ok) {
 414                 if (m->base >= 0x100000)
 415                         sub_interval(&s_data->mem_db, m->base, m->num);
 416                 return ok;
 417         }
 418         if (m->base < 0x100000)
 419                 return 0;
 420         return do_mem_probe(m->base, m->num, s);
 421 }
 422
 423 static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
 424 {
 425         struct resource_map *m, mm;
 426         static unsigned char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 };
 427         unsigned long b, i, ok = 0;
 428         struct socket_data *s_data = s->resource_data;
 429
 430         /* We do up to four passes through the list */
 431         if (probe_mask & MEM_PROBE_HIGH) {
 432                 if (inv_probe(s_data->mem_db.next, s) > 0)
 433                         return 0;
 434                 printk(KERN_NOTICE "cs: warning: no high memory space "
 435                        "available!\n");
 436                 return -ENODEV;
 437         }
 438
 439         for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
 440                 mm = *m;
 441                 /* Only probe < 1 MB */
 442                 if (mm.base >= 0x100000)
 443                         continue;
 444                 if ((mm.base | mm.num) & 0xffff) {
 445                         ok += do_mem_probe(mm.base, mm.num, s);
 446                         continue;
 447                 }
 448                 /* Special probe for 64K-aligned block */
 449                 for (i = 0; i < 4; i++) {
 450                         b = order[i] << 12;
 451                         if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) {
 452                                 if (ok >= mem_limit)
 453                                         sub_interval(&s_data->mem_db, b, 0x10000);
 454                                 else
 455                                         ok += do_mem_probe(b, 0x10000, s);
 456                         }
 457                 }
 458         }
 459
 460         if (ok > 0)
 461                 return 0;
 462
 463         return -ENODEV;
 464 }
 465
 466 #else /* CONFIG_PCMCIA_PROBE */
 467
 468 static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
 469 {
 470         struct resource_map *m, mm;
 471         struct socket_data *s_data = s->resource_data;
 472         unsigned long ok = 0;
 473
 474         for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
 475                 mm = *m;
 476                 ok += do_mem_probe(mm.base, mm.num, s);
 477         }
 478         if (ok > 0)
 479                 return 0;
 480         return -ENODEV;
 481 }
 482
 483 #endif /* CONFIG_PCMCIA_PROBE */
 484
 485
 486 /*
 487  * Locking note: Must be called with skt_mutex held!
 488  */
 489 static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s)
 490 {
 491         struct socket_data *s_data = s->resource_data;
 492         unsigned int probe_mask = MEM_PROBE_LOW;
 493         int ret = 0;
 494
 495         if (!probe_mem)
 496                 return 0;
 497
 498         mutex_lock(&rsrc_mutex);
 499
 500         if (s->features & SS_CAP_PAGE_REGS)
 501                 probe_mask = MEM_PROBE_HIGH;
 502
 503         if (probe_mask & ~s_data->rsrc_mem_probe) {
 504                 if (s->state & SOCKET_PRESENT)
 505                         ret = validate_mem(s, probe_mask);
 506                 if (!ret)
 507                         s_data->rsrc_mem_probe |= probe_mask;
 508         }
 509
 510         mutex_unlock(&rsrc_mutex);
 511
 512         return ret;
 513 }
 514
 515 struct pcmcia_align_data {
 516         unsigned long   mask;
 517         unsigned long   offset;
 518         struct resource_map     *map;
 519 };
 520
 521 static void
 522 pcmcia_common_align(void *align_data, struct resource *res,
 523                         resource_size_t size, resource_size_t align)
 524 {
 525         struct pcmcia_align_data *data = align_data;
 526         resource_size_t start;
 527         /*
 528          * Ensure that we have the correct start address
 529          */
 530         start = (res->start & ~data->mask) + data->offset;
 531         if (start < res->start)
 532                 start += data->mask + 1;
 533         res->start = start;
 534 }
 535
 536 static void
 537 pcmcia_align(void *align_data, struct resource *res, resource_size_t size,
 538                 resource_size_t align)
 539 {
 540         struct pcmcia_align_data *data = align_data;
 541         struct resource_map *m;
 542
 543         pcmcia_common_align(data, res, size, align);
 544
 545         for (m = data->map->next; m != data->map; m = m->next) {
 546                 unsigned long start = m->base;
 547                 unsigned long end = m->base + m->num - 1;
 548
 549                 /*
 550                  * If the lower resources are not available, try aligning
 551                  * to this entry of the resource database to see if it'll
 552                  * fit here.
 553                  */
 554                 if (res->start < start) {
 555                         res->start = start;
 556                         pcmcia_common_align(data, res, size, align);
 557                 }
 558
 559                 /*
 560                  * If we're above the area which was passed in, there's
 561                  * no point proceeding.
 562                  */
 563                 if (res->start >= res->end)
 564                         break;
 565
 566                 if ((res->start + size - 1) <= end)
 567                         break;
 568         }
 569
 570         /*
 571          * If we failed to find something suitable, ensure we fail.
 572          */
 573         if (m == data->map)
 574                 res->start = res->end;
 575 }
 576
 577 /*
 578  * Adjust an existing IO region allocation, but making sure that we don't
 579  * encroach outside the resources which the user supplied.
 580  */
 581 static int nonstatic_adjust_io_region(struct resource *res, unsigned long r_start,
 582                                       unsigned long r_end, struct pcmcia_socket *s)
 583 {
 584         struct resource_map *m;
 585         struct socket_data *s_data = s->resource_data;
 586         int ret = -ENOMEM;
 587
 588         mutex_lock(&rsrc_mutex);
 589         for (m = s_data->io_db.next; m != &s_data->io_db; m = m->next) {
 590                 unsigned long start = m->base;
 591                 unsigned long end = m->base + m->num - 1;
 592
 593                 if (start > r_start || r_end > end)
 594                         continue;
 595
 596                 ret = adjust_resource(res, r_start, r_end - r_start + 1);
 597                 break;
 598         }
 599         mutex_unlock(&rsrc_mutex);
 600
 601         return ret;
 602 }
 603
 604 /*======================================================================
 605
 606     These find ranges of I/O ports or memory addresses that are not
 607     currently allocated by other devices.
 608
 609     The 'align' field should reflect the number of bits of address
 610     that need to be preserved from the initial value of *base.  It
 611     should be a power of two, greater than or equal to 'num'.  A value
 612     of 0 means that all bits of *base are significant.  *base should
 613     also be strictly less than 'align'.
 614
 615 ======================================================================*/
 616
 617 static struct resource *nonstatic_find_io_region(unsigned long base, int num,
 618                    unsigned long align, struct pcmcia_socket *s)
 619 {
 620         struct resource *res = make_resource(0, num, IORESOURCE_IO, s->dev.bus_id);
 621         struct socket_data *s_data = s->resource_data;
 622         struct pcmcia_align_data data;
 623         unsigned long min = base;
 624         int ret;
 625
 626         if (align == 0)
 627                 align = 0x10000;
 628
 629         data.mask = align - 1;
 630         data.offset = base & data.mask;
 631         data.map = &s_data->io_db;
 632
 633         mutex_lock(&rsrc_mutex);
 634 #ifdef CONFIG_PCI
 635         if (s->cb_dev) {
 636                 ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
 637                                              min, 0, pcmcia_align, &data);
 638         } else
 639 #endif
 640                 ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
 641                                         1, pcmcia_align, &data);
 642         mutex_unlock(&rsrc_mutex);
 643
 644         if (ret != 0) {
 645                 kfree(res);
 646                 res = NULL;
 647         }
 648         return res;
 649 }
 650
 651 static struct resource * nonstatic_find_mem_region(u_long base, u_long num,
 652                 u_long align, int low, struct pcmcia_socket *s)
 653 {
 654         struct resource *res = make_resource(0, num, IORESOURCE_MEM, s->dev.bus_id);
 655         struct socket_data *s_data = s->resource_data;
 656         struct pcmcia_align_data data;
 657         unsigned long min, max;
 658         int ret, i;
 659
 660         low = low || !(s->features & SS_CAP_PAGE_REGS);
 661
 662         data.mask = align - 1;
 663         data.offset = base & data.mask;
 664         data.map = &s_data->mem_db;
 665
 666         for (i = 0; i < 2; i++) {
 667                 if (low) {
 668                         max = 0x100000UL;
 669                         min = base < max ? base : 0;
 670                 } else {
 671                         max = ~0UL;
 672                         min = 0x100000UL + base;
 673                 }
 674
 675                 mutex_lock(&rsrc_mutex);
 676 #ifdef CONFIG_PCI
 677                 if (s->cb_dev) {
 678                         ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num,
 679                                                      1, min, 0,
 680                                                      pcmcia_align, &data);
 681                 } else
 682 #endif
 683                         ret = allocate_resource(&iomem_resource, res, num, min,
 684                                                 max, 1, pcmcia_align, &data);
 685                 mutex_unlock(&rsrc_mutex);
 686                 if (ret == 0 || low)
 687                         break;
 688                 low = 1;
 689         }
 690
 691         if (ret != 0) {
 692                 kfree(res);
 693                 res = NULL;
 694         }
 695         return res;
 696 }
 697
 698
 699 static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
 700 {
 701         struct socket_data *data = s->resource_data;
 702         unsigned long size = end - start + 1;
 703         int ret = 0;
 704
 705         if (end < start)
 706                 return -EINVAL;
 707
 708         mutex_lock(&rsrc_mutex);
 709         switch (action) {
 710         case ADD_MANAGED_RESOURCE:
 711                 ret = add_interval(&data->mem_db, start, size);
 712                 break;
 713         case REMOVE_MANAGED_RESOURCE:
 714                 ret = sub_interval(&data->mem_db, start, size);
 715                 if (!ret) {
 716                         struct pcmcia_socket *socket;
 717                         down_read(&pcmcia_socket_list_rwsem);
 718                         list_for_each_entry(socket, &pcmcia_socket_list, socket_list)
 719                                 release_cis_mem(socket);
 720                         up_read(&pcmcia_socket_list_rwsem);
 721                 }
 722                 break;
 723         default:
 724                 ret = -EINVAL;
 725         }
 726         mutex_unlock(&rsrc_mutex);
 727
 728         return ret;
 729 }
 730
 731
 732 static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
 733 {
 734         struct socket_data *data = s->resource_data;
 735         unsigned long size = end - start + 1;
 736         int ret = 0;
 737
 738         if (end < start)
 739                 return -EINVAL;
 740
 741         if (end > IO_SPACE_LIMIT)
 742                 return -EINVAL;
 743
 744         mutex_lock(&rsrc_mutex);
 745         switch (action) {
 746         case ADD_MANAGED_RESOURCE:
 747                 if (add_interval(&data->io_db, start, size) != 0) {
 748                         ret = -EBUSY;
 749                         break;
 750                 }
 751 #ifdef CONFIG_PCMCIA_PROBE
 752                 if (probe_io)
 753                         do_io_probe(s, start, size);
 754 #endif
 755                 break;
 756         case REMOVE_MANAGED_RESOURCE:
 757                 sub_interval(&data->io_db, start, size);
 758                 break;
 759         default:
 760                 ret = -EINVAL;
 761                 break;
 762         }
 763         mutex_unlock(&rsrc_mutex);
 764
 765         return ret;
 766 }
 767
 768
 769 static int nonstatic_adjust_resource_info(struct pcmcia_socket *s, adjust_t *adj)
 770 {
 771         unsigned long end;
 772
 773         switch (adj->Resource) {
 774         case RES_MEMORY_RANGE:
 775                 end = adj->resource.memory.Base + adj->resource.memory.Size - 1;
 776                 return adjust_memory(s, adj->Action, adj->resource.memory.Base, end);
 777         case RES_IO_RANGE:
 778                 end = adj->resource.io.BasePort + adj->resource.io.NumPorts - 1;
 779                 return adjust_io(s, adj->Action, adj->resource.io.BasePort, end);
 780         }
 781         return CS_UNSUPPORTED_FUNCTION;
 782 }
 783
 784 #ifdef CONFIG_PCI
 785 static int nonstatic_autoadd_resources(struct pcmcia_socket *s)
 786 {
 787         struct resource *res;
 788         int i, done = 0;
 789
 790         if (!s->cb_dev || !s->cb_dev->bus)
 791                 return -ENODEV;
 792
 793 #if defined(CONFIG_X86)
 794         /* If this is the root bus, the risk of hitting
 795          * some strange system devices which aren't protected
 796          * by either ACPI resource tables or properly requested
 797          * resources is too big. Therefore, don't do auto-adding
 798          * of resources at the moment.
 799          */
 800         if (s->cb_dev->bus->number == 0)
 801                 return -EINVAL;
 802 #endif
 803
 804         for (i=0; i < PCI_BUS_NUM_RESOURCES; i++) {
 805                 res = s->cb_dev->bus->resource[i];
 806                 if (!res)
 807                         continue;
 808
 809                 if (res->flags & IORESOURCE_IO) {
 810                         if (res == &ioport_resource)
 811                                 continue;
 812                         printk(KERN_INFO "pcmcia: parent PCI bridge I/O "
 813                                 "window: 0x%llx - 0x%llx\n",
 814                                 (unsigned long long)res->start,
 815                                 (unsigned long long)res->end);
 816                         if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end))
 817                                 done |= IORESOURCE_IO;
 818
 819                 }
 820
 821                 if (res->flags & IORESOURCE_MEM) {
 822                         if (res == &iomem_resource)
 823                                 continue;
 824                         printk(KERN_INFO "pcmcia: parent PCI bridge Memory "
 825                                 "window: 0x%llx - 0x%llx\n",
 826                                 (unsigned long long)res->start,
 827                                 (unsigned long long)res->end);
 828                         if (!adjust_memory(s, ADD_MANAGED_RESOURCE, res->start, res->end))
 829                                 done |= IORESOURCE_MEM;
 830                 }
 831         }
 832
 833         /* if we got at least one of IO, and one of MEM, we can be glad and
 834          * activate the PCMCIA subsystem */
 835         if (done == (IORESOURCE_MEM | IORESOURCE_IO))
 836                 s->resource_setup_done = 1;
 837
 838         return 0;
 839 }
 840
 841 #else
 842
 843 static inline int nonstatic_autoadd_resources(struct pcmcia_socket *s)
 844 {
 845         return -ENODEV;
 846 }
 847
 848 #endif
 849
 850
 851 static int nonstatic_init(struct pcmcia_socket *s)
 852 {
 853         struct socket_data *data;
 854
 855         data = kzalloc(sizeof(struct socket_data), GFP_KERNEL);
 856         if (!data)
 857                 return -ENOMEM;
 858
 859         data->mem_db.next = &data->mem_db;
 860         data->io_db.next = &data->io_db;
 861
 862         s->resource_data = (void *) data;
 863
 864         nonstatic_autoadd_resources(s);
 865
 866         return 0;
 867 }
 868
 869 static void nonstatic_release_resource_db(struct pcmcia_socket *s)
 870 {
 871         struct socket_data *data = s->resource_data;
 872         struct resource_map *p, *q;
 873
 874         mutex_lock(&rsrc_mutex);
 875         for (p = data->mem_db.next; p != &data->mem_db; p = q) {
 876                 q = p->next;
 877                 kfree(p);
 878         }
 879         for (p = data->io_db.next; p != &data->io_db; p = q) {
 880                 q = p->next;
 881                 kfree(p);
 882         }
 883         mutex_unlock(&rsrc_mutex);
 884 }
 885
 886
 887 struct pccard_resource_ops pccard_nonstatic_ops = {
 888         .validate_mem = pcmcia_nonstatic_validate_mem,
 889         .adjust_io_region = nonstatic_adjust_io_region,
 890         .find_io = nonstatic_find_io_region,
 891         .find_mem = nonstatic_find_mem_region,
 892         .adjust_resource = nonstatic_adjust_resource_info,
 893         .init = nonstatic_init,
 894         .exit = nonstatic_release_resource_db,
 895 };
 896 EXPORT_SYMBOL(pccard_nonstatic_ops);
 897
 898
 899 /* sysfs interface to the resource database */
 900
 901 static ssize_t show_io_db(struct device *dev,
 902                           struct device_attribute *attr, char *buf)
 903 {
 904         struct pcmcia_socket *s = dev_get_drvdata(dev);
 905         struct socket_data *data;
 906         struct resource_map *p;
 907         ssize_t ret = 0;
 908
 909         mutex_lock(&rsrc_mutex);
 910         data = s->resource_data;
 911
 912         for (p = data->io_db.next; p != &data->io_db; p = p->next) {
 913                 if (ret > (PAGE_SIZE - 10))
 914                         continue;
 915                 ret += snprintf (&buf[ret], (PAGE_SIZE - ret - 1),
 916                                  "0x%08lx - 0x%08lx\n",
 917                                  ((unsigned long) p->base),
 918                                  ((unsigned long) p->base + p->num - 1));
 919         }
 920
 921         mutex_unlock(&rsrc_mutex);
 922         return (ret);
 923 }
 924
 925 static ssize_t store_io_db(struct device *dev,
 926                            struct device_attribute *attr,
 927                            const char *buf, size_t count)
 928 {
 929         struct pcmcia_socket *s = dev_get_drvdata(dev);
 930         unsigned long start_addr, end_addr;
 931         unsigned int add = ADD_MANAGED_RESOURCE;
 932         ssize_t ret = 0;
 933
 934         ret = sscanf (buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
 935         if (ret != 2) {
 936                 ret = sscanf (buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
 937                 add = REMOVE_MANAGED_RESOURCE;
 938                 if (ret != 2) {
 939                         ret = sscanf (buf, "0x%lx - 0x%lx", &start_addr, &end_addr);
 940                         add = ADD_MANAGED_RESOURCE;
 941                         if (ret != 2)
 942                                 return -EINVAL;
 943                 }
 944         }
 945         if (end_addr < start_addr)
 946                 return -EINVAL;
 947
 948         ret = adjust_io(s, add, start_addr, end_addr);
 949         if (!ret)
 950                 s->resource_setup_new = 1;
 951
 952         return ret ? ret : count;
 953 }
 954 static DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db);
 955
 956 static ssize_t show_mem_db(struct device *dev,
 957                            struct device_attribute *attr, char *buf)
 958 {
 959         struct pcmcia_socket *s = dev_get_drvdata(dev);
 960         struct socket_data *data;
 961         struct resource_map *p;
 962         ssize_t ret = 0;
 963
 964         mutex_lock(&rsrc_mutex);
 965         data = s->resource_data;
 966
 967         for (p = data->mem_db.next; p != &data->mem_db; p = p->next) {
 968                 if (ret > (PAGE_SIZE - 10))
 969                         continue;
 970                 ret += snprintf (&buf[ret], (PAGE_SIZE - ret - 1),
 971                                  "0x%08lx - 0x%08lx\n",
 972                                  ((unsigned long) p->base),
 973                                  ((unsigned long) p->base + p->num - 1));
 974         }
 975
 976         mutex_unlock(&rsrc_mutex);
 977         return (ret);
 978 }
 979
 980 static ssize_t store_mem_db(struct device *dev,
 981                             struct device_attribute *attr,
 982                             const char *buf, size_t count)
 983 {
 984         struct pcmcia_socket *s = dev_get_drvdata(dev);
 985         unsigned long start_addr, end_addr;
 986         unsigned int add = ADD_MANAGED_RESOURCE;
 987         ssize_t ret = 0;
 988
 989         ret = sscanf (buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
 990         if (ret != 2) {
 991                 ret = sscanf (buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
 992                 add = REMOVE_MANAGED_RESOURCE;
 993                 if (ret != 2) {
 994                         ret = sscanf (buf, "0x%lx - 0x%lx", &start_addr, &end_addr);
 995                         add = ADD_MANAGED_RESOURCE;
 996                         if (ret != 2)
 997                                 return -EINVAL;
 998                 }
 999         }
1000         if (end_addr < start_addr)
1001                 return -EINVAL;
1002
1003         ret = adjust_memory(s, add, start_addr, end_addr);
1004         if (!ret)
1005                 s->resource_setup_new = 1;
1006
1007         return ret ? ret : count;
1008 }
1009 static DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db);
1010
1011 static struct device_attribute *pccard_rsrc_attributes[] = {
1012         &dev_attr_available_resources_io,
1013         &dev_attr_available_resources_mem,
1014         NULL,
1015 };
1016
1017 static int __devinit pccard_sysfs_add_rsrc(struct device *dev,
1018                                            struct class_interface *class_intf)
1019 {
1020         struct pcmcia_socket *s = dev_get_drvdata(dev);
1021         struct device_attribute **attr;
1022         int ret = 0;
1023         if (s->resource_ops != &pccard_nonstatic_ops)
1024                 return 0;
1025
1026         for (attr = pccard_rsrc_attributes; *attr; attr++) {
1027                 ret = device_create_file(dev, *attr);
1028                 if (ret)
1029                         break;
1030         }
1031
1032         return ret;
1033 }
1034
1035 static void __devexit pccard_sysfs_remove_rsrc(struct device *dev,
1036                                                struct class_interface *class_intf)
1037 {
1038         struct pcmcia_socket *s = dev_get_drvdata(dev);
1039         struct device_attribute **attr;
1040
1041         if (s->resource_ops != &pccard_nonstatic_ops)
1042                 return;
1043
1044         for (attr = pccard_rsrc_attributes; *attr; attr++)
1045                 device_remove_file(dev, *attr);
1046 }
1047
1048 static struct class_interface pccard_rsrc_interface = {
1049         .class = &pcmcia_socket_class,
1050         .add_dev = &pccard_sysfs_add_rsrc,
1051         .remove_dev = __devexit_p(&pccard_sysfs_remove_rsrc),
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);