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/config.h> 16 #include <linux/module.h> 17 #include <linux/moduleparam.h> 18 #include <linux/init.h> 19 #include <linux/interrupt.h> 20 #include <linux/kernel.h> 21 #include <linux/errno.h> 22 #include <linux/types.h> 23 #include <linux/slab.h> 24 #include <linux/ioport.h> 25 #include <linux/timer.h> 26 #include <linux/pci.h> 27 #include <linux/device.h> 28 29 #include <asm/irq.h> 30 #include <asm/io.h> 31 32 #include <pcmcia/cs_types.h> 33 #include <pcmcia/ss.h> 34 #include <pcmcia/cs.h> 35 #include <pcmcia/bulkmem.h> 36 #include <pcmcia/cistpl.h> 37 #include "cs_internal.h" 38 39 MODULE_AUTHOR("David A. Hinds, Dominik Brodowski"); 40 MODULE_LICENSE("GPL"); 41 42 /* Parameters that can be set with 'insmod' */ 43 44 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) 45 46 INT_MODULE_PARM(probe_mem, 1); /* memory probe? */ 47 #ifdef CONFIG_PCMCIA_PROBE 48 INT_MODULE_PARM(probe_io, 1); /* IO port probe? */ 49 INT_MODULE_PARM(mem_limit, 0x10000); 50 #endif 51 52 /* for io_db and mem_db */ 53 struct resource_map { 54 u_long base, num; 55 struct resource_map *next; 56 }; 57 58 struct socket_data { 59 struct resource_map mem_db; 60 struct resource_map io_db; 61 unsigned int rsrc_mem_probe; 62 }; 63 64 static DECLARE_MUTEX(rsrc_sem); 65 #define MEM_PROBE_LOW (1 << 0) 66 #define MEM_PROBE_HIGH (1 << 1) 67 68 69 /*====================================================================== 70 71 Linux resource management extensions 72 73 ======================================================================*/ 74 75 static struct resource * 76 make_resource(unsigned long b, unsigned long n, int flags, char *name) 77 { 78 struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL); 79 80 if (res) { 81 res->name = name; 82 res->start = b; 83 res->end = b + n - 1; 84 res->flags = flags; 85 } 86 return res; 87 } 88 89 static struct resource * 90 claim_region(struct pcmcia_socket *s, unsigned long base, unsigned long size, 91 int type, char *name) 92 { 93 struct resource *res, *parent; 94 95 parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource; 96 res = make_resource(base, size, type | IORESOURCE_BUSY, name); 97 98 if (res) { 99 #ifdef CONFIG_PCI 100 if (s && s->cb_dev) 101 parent = pci_find_parent_resource(s->cb_dev, res); 102 #endif 103 if (!parent || request_resource(parent, res)) { 104 kfree(res); 105 res = NULL; 106 } 107 } 108 return res; 109 } 110 111 static void free_region(struct resource *res) 112 { 113 if (res) { 114 release_resource(res); 115 kfree(res); 116 } 117 } 118 119 /*====================================================================== 120 121 These manage the internal databases of available resources. 122 123 ======================================================================*/ 124 125 static int add_interval(struct resource_map *map, u_long base, u_long num) 126 { 127 struct resource_map *p, *q; 128 129 for (p = map; ; p = p->next) { 130 if ((p != map) && (p->base+p->num-1 >= base)) 131 return -1; 132 if ((p->next == map) || (p->next->base > base+num-1)) 133 break; 134 } 135 q = kmalloc(sizeof(struct resource_map), GFP_KERNEL); 136 if (!q) return CS_OUT_OF_RESOURCE; 137 q->base = base; q->num = num; 138 q->next = p->next; p->next = q; 139 return CS_SUCCESS; 140 } 141 142 /*====================================================================*/ 143 144 static int sub_interval(struct resource_map *map, u_long base, u_long num) 145 { 146 struct resource_map *p, *q; 147 148 for (p = map; ; p = q) { 149 q = p->next; 150 if (q == map) 151 break; 152 if ((q->base+q->num > base) && (base+num > q->base)) { 153 if (q->base >= base) { 154 if (q->base+q->num <= base+num) { 155 /* Delete whole block */ 156 p->next = q->next; 157 kfree(q); 158 /* don't advance the pointer yet */ 159 q = p; 160 } else { 161 /* Cut off bit from the front */ 162 q->num = q->base + q->num - base - num; 163 q->base = base + num; 164 } 165 } else if (q->base+q->num <= base+num) { 166 /* Cut off bit from the end */ 167 q->num = base - q->base; 168 } else { 169 /* Split the block into two pieces */ 170 p = kmalloc(sizeof(struct resource_map), GFP_KERNEL); 171 if (!p) return CS_OUT_OF_RESOURCE; 172 p->base = base+num; 173 p->num = q->base+q->num - p->base; 174 q->num = base - q->base; 175 p->next = q->next ; q->next = p; 176 } 177 } 178 } 179 return CS_SUCCESS; 180 } 181 182 /*====================================================================== 183 184 These routines examine a region of IO or memory addresses to 185 determine what ranges might be genuinely available. 186 187 ======================================================================*/ 188 189 #ifdef CONFIG_PCMCIA_PROBE 190 static void do_io_probe(struct pcmcia_socket *s, kio_addr_t base, kio_addr_t num) 191 { 192 struct resource *res; 193 struct socket_data *s_data = s->resource_data; 194 kio_addr_t i, j, bad; 195 int any; 196 u_char *b, hole, most; 197 198 printk(KERN_INFO "cs: IO port probe %#lx-%#lx:", 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(" %#lx-%#lx", 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(" %#lx-%#lx", 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_sem 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 down(&rsrc_sem); 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 up(&rsrc_sem); 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 unsigned long size, unsigned long align) 524 { 525 struct pcmcia_align_data *data = align_data; 526 unsigned long 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, 538 unsigned long size, unsigned long 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 down(&rsrc_sem); 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 up(&rsrc_sem); 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.class_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 down(&rsrc_sem); 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 up(&rsrc_sem); 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.class_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 down(&rsrc_sem); 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 up(&rsrc_sem); 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 down(&rsrc_sem); 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 up(&rsrc_sem); 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 down(&rsrc_sem); 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 up(&rsrc_sem); 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 window: 0x%lx - 0x%lx\n", 813 res->start, res->end); 814 if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end)) 815 done |= IORESOURCE_IO; 816 817 } 818 819 if (res->flags & IORESOURCE_MEM) { 820 if (res == &iomem_resource) 821 continue; 822 printk(KERN_INFO "pcmcia: parent PCI bridge Memory window: 0x%lx - 0x%lx\n", 823 res->start, res->end); 824 if (!adjust_memory(s, ADD_MANAGED_RESOURCE, res->start, res->end)) 825 done |= IORESOURCE_MEM; 826 } 827 } 828 829 /* if we got at least one of IO, and one of MEM, we can be glad and 830 * activate the PCMCIA subsystem */ 831 if (done == (IORESOURCE_MEM | IORESOURCE_IO)) 832 s->resource_setup_done = 1; 833 834 return 0; 835 } 836 837 #else 838 839 static inline int nonstatic_autoadd_resources(struct pcmcia_socket *s) 840 { 841 return -ENODEV; 842 } 843 844 #endif 845 846 847 static int nonstatic_init(struct pcmcia_socket *s) 848 { 849 struct socket_data *data; 850 851 data = kzalloc(sizeof(struct socket_data), GFP_KERNEL); 852 if (!data) 853 return -ENOMEM; 854 855 data->mem_db.next = &data->mem_db; 856 data->io_db.next = &data->io_db; 857 858 s->resource_data = (void *) data; 859 860 nonstatic_autoadd_resources(s); 861 862 return 0; 863 } 864 865 static void nonstatic_release_resource_db(struct pcmcia_socket *s) 866 { 867 struct socket_data *data = s->resource_data; 868 struct resource_map *p, *q; 869 870 down(&rsrc_sem); 871 for (p = data->mem_db.next; p != &data->mem_db; p = q) { 872 q = p->next; 873 kfree(p); 874 } 875 for (p = data->io_db.next; p != &data->io_db; p = q) { 876 q = p->next; 877 kfree(p); 878 } 879 up(&rsrc_sem); 880 } 881 882 883 struct pccard_resource_ops pccard_nonstatic_ops = { 884 .validate_mem = pcmcia_nonstatic_validate_mem, 885 .adjust_io_region = nonstatic_adjust_io_region, 886 .find_io = nonstatic_find_io_region, 887 .find_mem = nonstatic_find_mem_region, 888 .adjust_resource = nonstatic_adjust_resource_info, 889 .init = nonstatic_init, 890 .exit = nonstatic_release_resource_db, 891 }; 892 EXPORT_SYMBOL(pccard_nonstatic_ops); 893 894 895 /* sysfs interface to the resource database */ 896 897 static ssize_t show_io_db(struct class_device *class_dev, char *buf) 898 { 899 struct pcmcia_socket *s = class_get_devdata(class_dev); 900 struct socket_data *data; 901 struct resource_map *p; 902 ssize_t ret = 0; 903 904 down(&rsrc_sem); 905 data = s->resource_data; 906 907 for (p = data->io_db.next; p != &data->io_db; p = p->next) { 908 if (ret > (PAGE_SIZE - 10)) 909 continue; 910 ret += snprintf (&buf[ret], (PAGE_SIZE - ret - 1), 911 "0x%08lx - 0x%08lx\n", 912 ((unsigned long) p->base), 913 ((unsigned long) p->base + p->num - 1)); 914 } 915 916 up(&rsrc_sem); 917 return (ret); 918 } 919 920 static ssize_t store_io_db(struct class_device *class_dev, const char *buf, size_t count) 921 { 922 struct pcmcia_socket *s = class_get_devdata(class_dev); 923 unsigned long start_addr, end_addr; 924 unsigned int add = ADD_MANAGED_RESOURCE; 925 ssize_t ret = 0; 926 927 ret = sscanf (buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr); 928 if (ret != 2) { 929 ret = sscanf (buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr); 930 add = REMOVE_MANAGED_RESOURCE; 931 if (ret != 2) { 932 ret = sscanf (buf, "0x%lx - 0x%lx", &start_addr, &end_addr); 933 add = ADD_MANAGED_RESOURCE; 934 if (ret != 2) 935 return -EINVAL; 936 } 937 } 938 if (end_addr < start_addr) 939 return -EINVAL; 940 941 ret = adjust_io(s, add, start_addr, end_addr); 942 if (!ret) 943 s->resource_setup_new = 1; 944 945 return ret ? ret : count; 946 } 947 static CLASS_DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db); 948 949 static ssize_t show_mem_db(struct class_device *class_dev, char *buf) 950 { 951 struct pcmcia_socket *s = class_get_devdata(class_dev); 952 struct socket_data *data; 953 struct resource_map *p; 954 ssize_t ret = 0; 955 956 down(&rsrc_sem); 957 data = s->resource_data; 958 959 for (p = data->mem_db.next; p != &data->mem_db; p = p->next) { 960 if (ret > (PAGE_SIZE - 10)) 961 continue; 962 ret += snprintf (&buf[ret], (PAGE_SIZE - ret - 1), 963 "0x%08lx - 0x%08lx\n", 964 ((unsigned long) p->base), 965 ((unsigned long) p->base + p->num - 1)); 966 } 967 968 up(&rsrc_sem); 969 return (ret); 970 } 971 972 static ssize_t store_mem_db(struct class_device *class_dev, const char *buf, size_t count) 973 { 974 struct pcmcia_socket *s = class_get_devdata(class_dev); 975 unsigned long start_addr, end_addr; 976 unsigned int add = ADD_MANAGED_RESOURCE; 977 ssize_t ret = 0; 978 979 ret = sscanf (buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr); 980 if (ret != 2) { 981 ret = sscanf (buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr); 982 add = REMOVE_MANAGED_RESOURCE; 983 if (ret != 2) { 984 ret = sscanf (buf, "0x%lx - 0x%lx", &start_addr, &end_addr); 985 add = ADD_MANAGED_RESOURCE; 986 if (ret != 2) 987 return -EINVAL; 988 } 989 } 990 if (end_addr < start_addr) 991 return -EINVAL; 992 993 ret = adjust_memory(s, add, start_addr, end_addr); 994 if (!ret) 995 s->resource_setup_new = 1; 996 997 return ret ? ret : count; 998 } 999 static CLASS_DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db); 1000 1001 static struct class_device_attribute *pccard_rsrc_attributes[] = { 1002 &class_device_attr_available_resources_io, 1003 &class_device_attr_available_resources_mem, 1004 NULL, 1005 }; 1006 1007 static int __devinit pccard_sysfs_add_rsrc(struct class_device *class_dev, 1008 struct class_interface *class_intf) 1009 { 1010 struct pcmcia_socket *s = class_get_devdata(class_dev); 1011 struct class_device_attribute **attr; 1012 int ret = 0; 1013 if (s->resource_ops != &pccard_nonstatic_ops) 1014 return 0; 1015 1016 for (attr = pccard_rsrc_attributes; *attr; attr++) { 1017 ret = class_device_create_file(class_dev, *attr); 1018 if (ret) 1019 break; 1020 } 1021 1022 return ret; 1023 } 1024 1025 static void __devexit pccard_sysfs_remove_rsrc(struct class_device *class_dev, 1026 struct class_interface *class_intf) 1027 { 1028 struct pcmcia_socket *s = class_get_devdata(class_dev); 1029 struct class_device_attribute **attr; 1030 1031 if (s->resource_ops != &pccard_nonstatic_ops) 1032 return; 1033 1034 for (attr = pccard_rsrc_attributes; *attr; attr++) 1035 class_device_remove_file(class_dev, *attr); 1036 } 1037 1038 static struct class_interface pccard_rsrc_interface = { 1039 .class = &pcmcia_socket_class, 1040 .add = &pccard_sysfs_add_rsrc, 1041 .remove = __devexit_p(&pccard_sysfs_remove_rsrc), 1042 }; 1043 1044 static int __init nonstatic_sysfs_init(void) 1045 { 1046 return class_interface_register(&pccard_rsrc_interface); 1047 } 1048 1049 static void __exit nonstatic_sysfs_exit(void) 1050 { 1051 class_interface_unregister(&pccard_rsrc_interface); 1052 } 1053 1054 module_init(nonstatic_sysfs_init); 1055 module_exit(nonstatic_sysfs_exit); 1056