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1/*
2 * resource.c - Contains functions for registering and analyzing resource information
3 *
4 * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
5 * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
6 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
7 * Bjorn Helgaas <bjorn.helgaas@hp.com>
8 */
9
10#include <linux/module.h>
11#include <linux/slab.h>
12#include <linux/errno.h>
13#include <linux/interrupt.h>
14#include <linux/kernel.h>
15#include <asm/io.h>
16#include <asm/dma.h>
17#include <asm/irq.h>
18#include <linux/pci.h>
19#include <linux/ioport.h>
20#include <linux/init.h>
21
22#include <linux/pnp.h>
23#include "base.h"
24
25static int pnp_reserve_irq[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some IRQ */
26static int pnp_reserve_dma[8] = {[0 ... 7] = -1 }; /* reserve (don't use) some DMA */
27static int pnp_reserve_io[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some I/O region */
28static int pnp_reserve_mem[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some memory region */
29
30/*
31 * option registration
32 */
33
34static struct pnp_option *pnp_build_option(struct pnp_dev *dev, unsigned long type,
35 unsigned int option_flags)
36{
37 struct pnp_option *option;
38
39 option = kzalloc(sizeof(struct pnp_option), GFP_KERNEL);
40 if (!option)
41 return NULL;
42
43 option->flags = option_flags;
44 option->type = type;
45
46 list_add_tail(&option->list, &dev->options);
47 return option;
48}
49
50int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags,
51 pnp_irq_mask_t *map, unsigned char flags)
52{
53 struct pnp_option *option;
54 struct pnp_irq *irq;
55
56 option = pnp_build_option(dev, IORESOURCE_IRQ, option_flags);
57 if (!option)
58 return -ENOMEM;
59
60 irq = &option->u.irq;
61 irq->map = *map;
62 irq->flags = flags;
63
64#ifdef CONFIG_PCI
65 {
66 int i;
67
68 for (i = 0; i < 16; i++)
69 if (test_bit(i, irq->map.bits))
70 pcibios_penalize_isa_irq(i, 0);
71 }
72#endif
73
74 dbg_pnp_show_option(dev, option);
75 return 0;
76}
77
78int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags,
79 unsigned char map, unsigned char flags)
80{
81 struct pnp_option *option;
82 struct pnp_dma *dma;
83
84 option = pnp_build_option(dev, IORESOURCE_DMA, option_flags);
85 if (!option)
86 return -ENOMEM;
87
88 dma = &option->u.dma;
89 dma->map = map;
90 dma->flags = flags;
91
92 dbg_pnp_show_option(dev, option);
93 return 0;
94}
95
96int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags,
97 resource_size_t min, resource_size_t max,
98 resource_size_t align, resource_size_t size,
99 unsigned char flags)
100{
101 struct pnp_option *option;
102 struct pnp_port *port;
103
104 option = pnp_build_option(dev, IORESOURCE_IO, option_flags);
105 if (!option)
106 return -ENOMEM;
107
108 port = &option->u.port;
109 port->min = min;
110 port->max = max;
111 port->align = align;
112 port->size = size;
113 port->flags = flags;
114
115 dbg_pnp_show_option(dev, option);
116 return 0;
117}
118
119int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags,
120 resource_size_t min, resource_size_t max,
121 resource_size_t align, resource_size_t size,
122 unsigned char flags)
123{
124 struct pnp_option *option;
125 struct pnp_mem *mem;
126
127 option = pnp_build_option(dev, IORESOURCE_MEM, option_flags);
128 if (!option)
129 return -ENOMEM;
130
131 mem = &option->u.mem;
132 mem->min = min;
133 mem->max = max;
134 mem->align = align;
135 mem->size = size;
136 mem->flags = flags;
137
138 dbg_pnp_show_option(dev, option);
139 return 0;
140}
141
142void pnp_free_options(struct pnp_dev *dev)
143{
144 struct pnp_option *option, *tmp;
145
146 list_for_each_entry_safe(option, tmp, &dev->options, list) {
147 list_del(&option->list);
148 kfree(option);
149 }
150}
151
152/*
153 * resource validity checking
154 */
155
156#define length(start, end) (*(end) - *(start) + 1)
157
158/* Two ranges conflict if one doesn't end before the other starts */
159#define ranged_conflict(starta, enda, startb, endb) \
160 !((*(enda) < *(startb)) || (*(endb) < *(starta)))
161
162#define cannot_compare(flags) \
163((flags) & IORESOURCE_DISABLED)
164
165int pnp_check_port(struct pnp_dev *dev, struct resource *res)
166{
167 int i;
168 struct pnp_dev *tdev;
169 struct resource *tres;
170 resource_size_t *port, *end, *tport, *tend;
171
172 port = &res->start;
173 end = &res->end;
174
175 /* if the resource doesn't exist, don't complain about it */
176 if (cannot_compare(res->flags))
177 return 1;
178
179 /* check if the resource is already in use, skip if the
180 * device is active because it itself may be in use */
181 if (!dev->active) {
182 if (__check_region(&ioport_resource, *port, length(port, end)))
183 return 0;
184 }
185
186 /* check if the resource is reserved */
187 for (i = 0; i < 8; i++) {
188 int rport = pnp_reserve_io[i << 1];
189 int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;
190 if (ranged_conflict(port, end, &rport, &rend))
191 return 0;
192 }
193
194 /* check for internal conflicts */
195 for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
196 if (tres != res && tres->flags & IORESOURCE_IO) {
197 tport = &tres->start;
198 tend = &tres->end;
199 if (ranged_conflict(port, end, tport, tend))
200 return 0;
201 }
202 }
203
204 /* check for conflicts with other pnp devices */
205 pnp_for_each_dev(tdev) {
206 if (tdev == dev)
207 continue;
208 for (i = 0;
209 (tres = pnp_get_resource(tdev, IORESOURCE_IO, i));
210 i++) {
211 if (tres->flags & IORESOURCE_IO) {
212 if (cannot_compare(tres->flags))
213 continue;
214 if (tres->flags & IORESOURCE_WINDOW)
215 continue;
216 tport = &tres->start;
217 tend = &tres->end;
218 if (ranged_conflict(port, end, tport, tend))
219 return 0;
220 }
221 }
222 }
223
224 return 1;
225}
226
227int pnp_check_mem(struct pnp_dev *dev, struct resource *res)
228{
229 int i;
230 struct pnp_dev *tdev;
231 struct resource *tres;
232 resource_size_t *addr, *end, *taddr, *tend;
233
234 addr = &res->start;
235 end = &res->end;
236
237 /* if the resource doesn't exist, don't complain about it */
238 if (cannot_compare(res->flags))
239 return 1;
240
241 /* check if the resource is already in use, skip if the
242 * device is active because it itself may be in use */
243 if (!dev->active) {
244 if (check_mem_region(*addr, length(addr, end)))
245 return 0;
246 }
247
248 /* check if the resource is reserved */
249 for (i = 0; i < 8; i++) {
250 int raddr = pnp_reserve_mem[i << 1];
251 int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;
252 if (ranged_conflict(addr, end, &raddr, &rend))
253 return 0;
254 }
255
256 /* check for internal conflicts */
257 for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
258 if (tres != res && tres->flags & IORESOURCE_MEM) {
259 taddr = &tres->start;
260 tend = &tres->end;
261 if (ranged_conflict(addr, end, taddr, tend))
262 return 0;
263 }
264 }
265
266 /* check for conflicts with other pnp devices */
267 pnp_for_each_dev(tdev) {
268 if (tdev == dev)
269 continue;
270 for (i = 0;
271 (tres = pnp_get_resource(tdev, IORESOURCE_MEM, i));
272 i++) {
273 if (tres->flags & IORESOURCE_MEM) {
274 if (cannot_compare(tres->flags))
275 continue;
276 if (tres->flags & IORESOURCE_WINDOW)
277 continue;
278 taddr = &tres->start;
279 tend = &tres->end;
280 if (ranged_conflict(addr, end, taddr, tend))
281 return 0;
282 }
283 }
284 }
285
286 return 1;
287}
288
289static irqreturn_t pnp_test_handler(int irq, void *dev_id)
290{
291 return IRQ_HANDLED;
292}
293
294#ifdef CONFIG_PCI
295static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci,
296 unsigned int irq)
297{
298 u32 class;
299 u8 progif;
300
301 if (pci->irq == irq) {
302 pnp_dbg(&pnp->dev, " device %s using irq %d\n",
303 pci_name(pci), irq);
304 return 1;
305 }
306
307 /*
308 * See pci_setup_device() and ata_pci_sff_activate_host() for
309 * similar IDE legacy detection.
310 */
311 pci_read_config_dword(pci, PCI_CLASS_REVISION, &class);
312 class >>= 8; /* discard revision ID */
313 progif = class & 0xff;
314 class >>= 8;
315
316 if (class == PCI_CLASS_STORAGE_IDE) {
317 /*
318 * Unless both channels are native-PCI mode only,
319 * treat the compatibility IRQs as busy.
320 */
321 if ((progif & 0x5) != 0x5)
322 if (pci_get_legacy_ide_irq(pci, 0) == irq ||
323 pci_get_legacy_ide_irq(pci, 1) == irq) {
324 pnp_dbg(&pnp->dev, " legacy IDE device %s "
325 "using irq %d\n", pci_name(pci), irq);
326 return 1;
327 }
328 }
329
330 return 0;
331}
332#endif
333
334static int pci_uses_irq(struct pnp_dev *pnp, unsigned int irq)
335{
336#ifdef CONFIG_PCI
337 struct pci_dev *pci = NULL;
338
339 for_each_pci_dev(pci) {
340 if (pci_dev_uses_irq(pnp, pci, irq)) {
341 pci_dev_put(pci);
342 return 1;
343 }
344 }
345#endif
346 return 0;
347}
348
349int pnp_check_irq(struct pnp_dev *dev, struct resource *res)
350{
351 int i;
352 struct pnp_dev *tdev;
353 struct resource *tres;
354 resource_size_t *irq;
355
356 irq = &res->start;
357
358 /* if the resource doesn't exist, don't complain about it */
359 if (cannot_compare(res->flags))
360 return 1;
361
362 /* check if the resource is valid */
363 if (*irq < 0 || *irq > 15)
364 return 0;
365
366 /* check if the resource is reserved */
367 for (i = 0; i < 16; i++) {
368 if (pnp_reserve_irq[i] == *irq)
369 return 0;
370 }
371
372 /* check for internal conflicts */
373 for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
374 if (tres != res && tres->flags & IORESOURCE_IRQ) {
375 if (tres->start == *irq)
376 return 0;
377 }
378 }
379
380 /* check if the resource is being used by a pci device */
381 if (pci_uses_irq(dev, *irq))
382 return 0;
383
384 /* check if the resource is already in use, skip if the
385 * device is active because it itself may be in use */
386 if (!dev->active) {
387 if (request_irq(*irq, pnp_test_handler,
388 IRQF_PROBE_SHARED, "pnp", NULL))
389 return 0;
390 free_irq(*irq, NULL);
391 }
392
393 /* check for conflicts with other pnp devices */
394 pnp_for_each_dev(tdev) {
395 if (tdev == dev)
396 continue;
397 for (i = 0;
398 (tres = pnp_get_resource(tdev, IORESOURCE_IRQ, i));
399 i++) {
400 if (tres->flags & IORESOURCE_IRQ) {
401 if (cannot_compare(tres->flags))
402 continue;
403 if (tres->start == *irq)
404 return 0;
405 }
406 }
407 }
408
409 return 1;
410}
411
412#ifdef CONFIG_ISA_DMA_API
413int pnp_check_dma(struct pnp_dev *dev, struct resource *res)
414{
415 int i;
416 struct pnp_dev *tdev;
417 struct resource *tres;
418 resource_size_t *dma;
419
420 dma = &res->start;
421
422 /* if the resource doesn't exist, don't complain about it */
423 if (cannot_compare(res->flags))
424 return 1;
425
426 /* check if the resource is valid */
427 if (*dma < 0 || *dma == 4 || *dma > 7)
428 return 0;
429
430 /* check if the resource is reserved */
431 for (i = 0; i < 8; i++) {
432 if (pnp_reserve_dma[i] == *dma)
433 return 0;
434 }
435
436 /* check for internal conflicts */
437 for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
438 if (tres != res && tres->flags & IORESOURCE_DMA) {
439 if (tres->start == *dma)
440 return 0;
441 }
442 }
443
444 /* check if the resource is already in use, skip if the
445 * device is active because it itself may be in use */
446 if (!dev->active) {
447 if (request_dma(*dma, "pnp"))
448 return 0;
449 free_dma(*dma);
450 }
451
452 /* check for conflicts with other pnp devices */
453 pnp_for_each_dev(tdev) {
454 if (tdev == dev)
455 continue;
456 for (i = 0;
457 (tres = pnp_get_resource(tdev, IORESOURCE_DMA, i));
458 i++) {
459 if (tres->flags & IORESOURCE_DMA) {
460 if (cannot_compare(tres->flags))
461 continue;
462 if (tres->start == *dma)
463 return 0;
464 }
465 }
466 }
467
468 return 1;
469}
470#endif /* CONFIG_ISA_DMA_API */
471
472unsigned long pnp_resource_type(struct resource *res)
473{
474 return res->flags & (IORESOURCE_IO | IORESOURCE_MEM |
475 IORESOURCE_IRQ | IORESOURCE_DMA |
476 IORESOURCE_BUS);
477}
478
479struct resource *pnp_get_resource(struct pnp_dev *dev,
480 unsigned long type, unsigned int num)
481{
482 struct pnp_resource *pnp_res;
483 struct resource *res;
484
485 list_for_each_entry(pnp_res, &dev->resources, list) {
486 res = &pnp_res->res;
487 if (pnp_resource_type(res) == type && num-- == 0)
488 return res;
489 }
490 return NULL;
491}
492EXPORT_SYMBOL(pnp_get_resource);
493
494static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
495{
496 struct pnp_resource *pnp_res;
497
498 pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
499 if (!pnp_res)
500 return NULL;
501
502 list_add_tail(&pnp_res->list, &dev->resources);
503 return pnp_res;
504}
505
506struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
507 struct resource *res)
508{
509 struct pnp_resource *pnp_res;
510
511 pnp_res = pnp_new_resource(dev);
512 if (!pnp_res) {
513 dev_err(&dev->dev, "can't add resource %pR\n", res);
514 return NULL;
515 }
516
517 pnp_res->res = *res;
518 pnp_res->res.name = dev->name;
519 dev_dbg(&dev->dev, "%pR\n", res);
520 return pnp_res;
521}
522
523struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
524 int flags)
525{
526 struct pnp_resource *pnp_res;
527 struct resource *res;
528
529 pnp_res = pnp_new_resource(dev);
530 if (!pnp_res) {
531 dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
532 return NULL;
533 }
534
535 res = &pnp_res->res;
536 res->flags = IORESOURCE_IRQ | flags;
537 res->start = irq;
538 res->end = irq;
539
540 dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
541 return pnp_res;
542}
543
544struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
545 int flags)
546{
547 struct pnp_resource *pnp_res;
548 struct resource *res;
549
550 pnp_res = pnp_new_resource(dev);
551 if (!pnp_res) {
552 dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
553 return NULL;
554 }
555
556 res = &pnp_res->res;
557 res->flags = IORESOURCE_DMA | flags;
558 res->start = dma;
559 res->end = dma;
560
561 dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
562 return pnp_res;
563}
564
565struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
566 resource_size_t start,
567 resource_size_t end, int flags)
568{
569 struct pnp_resource *pnp_res;
570 struct resource *res;
571
572 pnp_res = pnp_new_resource(dev);
573 if (!pnp_res) {
574 dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",
575 (unsigned long long) start,
576 (unsigned long long) end);
577 return NULL;
578 }
579
580 res = &pnp_res->res;
581 res->flags = IORESOURCE_IO | flags;
582 res->start = start;
583 res->end = end;
584
585 dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
586 return pnp_res;
587}
588
589struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
590 resource_size_t start,
591 resource_size_t end, int flags)
592{
593 struct pnp_resource *pnp_res;
594 struct resource *res;
595
596 pnp_res = pnp_new_resource(dev);
597 if (!pnp_res) {
598 dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",
599 (unsigned long long) start,
600 (unsigned long long) end);
601 return NULL;
602 }
603
604 res = &pnp_res->res;
605 res->flags = IORESOURCE_MEM | flags;
606 res->start = start;
607 res->end = end;
608
609 dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
610 return pnp_res;
611}
612
613struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
614 resource_size_t start,
615 resource_size_t end)
616{
617 struct pnp_resource *pnp_res;
618 struct resource *res;
619
620 pnp_res = pnp_new_resource(dev);
621 if (!pnp_res) {
622 dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n",
623 (unsigned long long) start,
624 (unsigned long long) end);
625 return NULL;
626 }
627
628 res = &pnp_res->res;
629 res->flags = IORESOURCE_BUS;
630 res->start = start;
631 res->end = end;
632
633 dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
634 return pnp_res;
635}
636
637/*
638 * Determine whether the specified resource is a possible configuration
639 * for this device.
640 */
641int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start,
642 resource_size_t size)
643{
644 struct pnp_option *option;
645 struct pnp_port *port;
646 struct pnp_mem *mem;
647 struct pnp_irq *irq;
648 struct pnp_dma *dma;
649
650 list_for_each_entry(option, &dev->options, list) {
651 if (option->type != type)
652 continue;
653
654 switch (option->type) {
655 case IORESOURCE_IO:
656 port = &option->u.port;
657 if (port->min == start && port->size == size)
658 return 1;
659 break;
660 case IORESOURCE_MEM:
661 mem = &option->u.mem;
662 if (mem->min == start && mem->size == size)
663 return 1;
664 break;
665 case IORESOURCE_IRQ:
666 irq = &option->u.irq;
667 if (start < PNP_IRQ_NR &&
668 test_bit(start, irq->map.bits))
669 return 1;
670 break;
671 case IORESOURCE_DMA:
672 dma = &option->u.dma;
673 if (dma->map & (1 << start))
674 return 1;
675 break;
676 }
677 }
678
679 return 0;
680}
681EXPORT_SYMBOL(pnp_possible_config);
682
683int pnp_range_reserved(resource_size_t start, resource_size_t end)
684{
685 struct pnp_dev *dev;
686 struct pnp_resource *pnp_res;
687 resource_size_t *dev_start, *dev_end;
688
689 pnp_for_each_dev(dev) {
690 list_for_each_entry(pnp_res, &dev->resources, list) {
691 dev_start = &pnp_res->res.start;
692 dev_end = &pnp_res->res.end;
693 if (ranged_conflict(&start, &end, dev_start, dev_end))
694 return 1;
695 }
696 }
697 return 0;
698}
699EXPORT_SYMBOL(pnp_range_reserved);
700
701/* format is: pnp_reserve_irq=irq1[,irq2] .... */
702static int __init pnp_setup_reserve_irq(char *str)
703{
704 int i;
705
706 for (i = 0; i < 16; i++)
707 if (get_option(&str, &pnp_reserve_irq[i]) != 2)
708 break;
709 return 1;
710}
711
712__setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
713
714/* format is: pnp_reserve_dma=dma1[,dma2] .... */
715static int __init pnp_setup_reserve_dma(char *str)
716{
717 int i;
718
719 for (i = 0; i < 8; i++)
720 if (get_option(&str, &pnp_reserve_dma[i]) != 2)
721 break;
722 return 1;
723}
724
725__setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
726
727/* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
728static int __init pnp_setup_reserve_io(char *str)
729{
730 int i;
731
732 for (i = 0; i < 16; i++)
733 if (get_option(&str, &pnp_reserve_io[i]) != 2)
734 break;
735 return 1;
736}
737
738__setup("pnp_reserve_io=", pnp_setup_reserve_io);
739
740/* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
741static int __init pnp_setup_reserve_mem(char *str)
742{
743 int i;
744
745 for (i = 0; i < 16; i++)
746 if (get_option(&str, &pnp_reserve_mem[i]) != 2)
747 break;
748 return 1;
749}
750
751__setup("pnp_reserve_mem=", pnp_setup_reserve_mem);
1/*
2 * resource.c - Contains functions for registering and analyzing resource information
3 *
4 * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
5 * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
6 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
7 * Bjorn Helgaas <bjorn.helgaas@hp.com>
8 */
9
10#include <linux/module.h>
11#include <linux/slab.h>
12#include <linux/errno.h>
13#include <linux/interrupt.h>
14#include <linux/kernel.h>
15#include <asm/io.h>
16#include <asm/dma.h>
17#include <asm/irq.h>
18#include <linux/pci.h>
19#include <linux/ioport.h>
20#include <linux/init.h>
21
22#include <linux/pnp.h>
23#include "base.h"
24
25static int pnp_reserve_irq[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some IRQ */
26static int pnp_reserve_dma[8] = {[0 ... 7] = -1 }; /* reserve (don't use) some DMA */
27static int pnp_reserve_io[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some I/O region */
28static int pnp_reserve_mem[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some memory region */
29
30/*
31 * option registration
32 */
33
34static struct pnp_option *pnp_build_option(struct pnp_dev *dev, unsigned long type,
35 unsigned int option_flags)
36{
37 struct pnp_option *option;
38
39 option = kzalloc(sizeof(struct pnp_option), GFP_KERNEL);
40 if (!option)
41 return NULL;
42
43 option->flags = option_flags;
44 option->type = type;
45
46 list_add_tail(&option->list, &dev->options);
47 return option;
48}
49
50int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags,
51 pnp_irq_mask_t *map, unsigned char flags)
52{
53 struct pnp_option *option;
54 struct pnp_irq *irq;
55
56 option = pnp_build_option(dev, IORESOURCE_IRQ, option_flags);
57 if (!option)
58 return -ENOMEM;
59
60 irq = &option->u.irq;
61 irq->map = *map;
62 irq->flags = flags;
63
64#ifdef CONFIG_PCI
65 {
66 int i;
67
68 for (i = 0; i < 16; i++)
69 if (test_bit(i, irq->map.bits))
70 pcibios_penalize_isa_irq(i, 0);
71 }
72#endif
73
74 dbg_pnp_show_option(dev, option);
75 return 0;
76}
77
78int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags,
79 unsigned char map, unsigned char flags)
80{
81 struct pnp_option *option;
82 struct pnp_dma *dma;
83
84 option = pnp_build_option(dev, IORESOURCE_DMA, option_flags);
85 if (!option)
86 return -ENOMEM;
87
88 dma = &option->u.dma;
89 dma->map = map;
90 dma->flags = flags;
91
92 dbg_pnp_show_option(dev, option);
93 return 0;
94}
95
96int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags,
97 resource_size_t min, resource_size_t max,
98 resource_size_t align, resource_size_t size,
99 unsigned char flags)
100{
101 struct pnp_option *option;
102 struct pnp_port *port;
103
104 option = pnp_build_option(dev, IORESOURCE_IO, option_flags);
105 if (!option)
106 return -ENOMEM;
107
108 port = &option->u.port;
109 port->min = min;
110 port->max = max;
111 port->align = align;
112 port->size = size;
113 port->flags = flags;
114
115 dbg_pnp_show_option(dev, option);
116 return 0;
117}
118
119int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags,
120 resource_size_t min, resource_size_t max,
121 resource_size_t align, resource_size_t size,
122 unsigned char flags)
123{
124 struct pnp_option *option;
125 struct pnp_mem *mem;
126
127 option = pnp_build_option(dev, IORESOURCE_MEM, option_flags);
128 if (!option)
129 return -ENOMEM;
130
131 mem = &option->u.mem;
132 mem->min = min;
133 mem->max = max;
134 mem->align = align;
135 mem->size = size;
136 mem->flags = flags;
137
138 dbg_pnp_show_option(dev, option);
139 return 0;
140}
141
142void pnp_free_options(struct pnp_dev *dev)
143{
144 struct pnp_option *option, *tmp;
145
146 list_for_each_entry_safe(option, tmp, &dev->options, list) {
147 list_del(&option->list);
148 kfree(option);
149 }
150}
151
152/*
153 * resource validity checking
154 */
155
156#define length(start, end) (*(end) - *(start) + 1)
157
158/* Two ranges conflict if one doesn't end before the other starts */
159#define ranged_conflict(starta, enda, startb, endb) \
160 !((*(enda) < *(startb)) || (*(endb) < *(starta)))
161
162#define cannot_compare(flags) \
163((flags) & IORESOURCE_DISABLED)
164
165int pnp_check_port(struct pnp_dev *dev, struct resource *res)
166{
167 int i;
168 struct pnp_dev *tdev;
169 struct resource *tres;
170 resource_size_t *port, *end, *tport, *tend;
171
172 port = &res->start;
173 end = &res->end;
174
175 /* if the resource doesn't exist, don't complain about it */
176 if (cannot_compare(res->flags))
177 return 1;
178
179 /* check if the resource is already in use, skip if the
180 * device is active because it itself may be in use */
181 if (!dev->active) {
182 if (!request_region(*port, length(port, end), "pnp"))
183 return 0;
184 release_region(*port, length(port, end));
185 }
186
187 /* check if the resource is reserved */
188 for (i = 0; i < 8; i++) {
189 int rport = pnp_reserve_io[i << 1];
190 int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;
191 if (ranged_conflict(port, end, &rport, &rend))
192 return 0;
193 }
194
195 /* check for internal conflicts */
196 for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
197 if (tres != res && tres->flags & IORESOURCE_IO) {
198 tport = &tres->start;
199 tend = &tres->end;
200 if (ranged_conflict(port, end, tport, tend))
201 return 0;
202 }
203 }
204
205 /* check for conflicts with other pnp devices */
206 pnp_for_each_dev(tdev) {
207 if (tdev == dev)
208 continue;
209 for (i = 0;
210 (tres = pnp_get_resource(tdev, IORESOURCE_IO, i));
211 i++) {
212 if (tres->flags & IORESOURCE_IO) {
213 if (cannot_compare(tres->flags))
214 continue;
215 if (tres->flags & IORESOURCE_WINDOW)
216 continue;
217 tport = &tres->start;
218 tend = &tres->end;
219 if (ranged_conflict(port, end, tport, tend))
220 return 0;
221 }
222 }
223 }
224
225 return 1;
226}
227
228int pnp_check_mem(struct pnp_dev *dev, struct resource *res)
229{
230 int i;
231 struct pnp_dev *tdev;
232 struct resource *tres;
233 resource_size_t *addr, *end, *taddr, *tend;
234
235 addr = &res->start;
236 end = &res->end;
237
238 /* if the resource doesn't exist, don't complain about it */
239 if (cannot_compare(res->flags))
240 return 1;
241
242 /* check if the resource is already in use, skip if the
243 * device is active because it itself may be in use */
244 if (!dev->active) {
245 if (!request_mem_region(*addr, length(addr, end), "pnp"))
246 return 0;
247 release_mem_region(*addr, length(addr, end));
248 }
249
250 /* check if the resource is reserved */
251 for (i = 0; i < 8; i++) {
252 int raddr = pnp_reserve_mem[i << 1];
253 int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;
254 if (ranged_conflict(addr, end, &raddr, &rend))
255 return 0;
256 }
257
258 /* check for internal conflicts */
259 for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
260 if (tres != res && tres->flags & IORESOURCE_MEM) {
261 taddr = &tres->start;
262 tend = &tres->end;
263 if (ranged_conflict(addr, end, taddr, tend))
264 return 0;
265 }
266 }
267
268 /* check for conflicts with other pnp devices */
269 pnp_for_each_dev(tdev) {
270 if (tdev == dev)
271 continue;
272 for (i = 0;
273 (tres = pnp_get_resource(tdev, IORESOURCE_MEM, i));
274 i++) {
275 if (tres->flags & IORESOURCE_MEM) {
276 if (cannot_compare(tres->flags))
277 continue;
278 if (tres->flags & IORESOURCE_WINDOW)
279 continue;
280 taddr = &tres->start;
281 tend = &tres->end;
282 if (ranged_conflict(addr, end, taddr, tend))
283 return 0;
284 }
285 }
286 }
287
288 return 1;
289}
290
291static irqreturn_t pnp_test_handler(int irq, void *dev_id)
292{
293 return IRQ_HANDLED;
294}
295
296#ifdef CONFIG_PCI
297static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci,
298 unsigned int irq)
299{
300 u32 class;
301 u8 progif;
302
303 if (pci->irq == irq) {
304 pnp_dbg(&pnp->dev, " device %s using irq %d\n",
305 pci_name(pci), irq);
306 return 1;
307 }
308
309 /*
310 * See pci_setup_device() and ata_pci_sff_activate_host() for
311 * similar IDE legacy detection.
312 */
313 pci_read_config_dword(pci, PCI_CLASS_REVISION, &class);
314 class >>= 8; /* discard revision ID */
315 progif = class & 0xff;
316 class >>= 8;
317
318 if (class == PCI_CLASS_STORAGE_IDE) {
319 /*
320 * Unless both channels are native-PCI mode only,
321 * treat the compatibility IRQs as busy.
322 */
323 if ((progif & 0x5) != 0x5)
324 if (pci_get_legacy_ide_irq(pci, 0) == irq ||
325 pci_get_legacy_ide_irq(pci, 1) == irq) {
326 pnp_dbg(&pnp->dev, " legacy IDE device %s "
327 "using irq %d\n", pci_name(pci), irq);
328 return 1;
329 }
330 }
331
332 return 0;
333}
334#endif
335
336static int pci_uses_irq(struct pnp_dev *pnp, unsigned int irq)
337{
338#ifdef CONFIG_PCI
339 struct pci_dev *pci = NULL;
340
341 for_each_pci_dev(pci) {
342 if (pci_dev_uses_irq(pnp, pci, irq)) {
343 pci_dev_put(pci);
344 return 1;
345 }
346 }
347#endif
348 return 0;
349}
350
351int pnp_check_irq(struct pnp_dev *dev, struct resource *res)
352{
353 int i;
354 struct pnp_dev *tdev;
355 struct resource *tres;
356 resource_size_t *irq;
357
358 irq = &res->start;
359
360 /* if the resource doesn't exist, don't complain about it */
361 if (cannot_compare(res->flags))
362 return 1;
363
364 /* check if the resource is valid */
365 if (*irq > 15)
366 return 0;
367
368 /* check if the resource is reserved */
369 for (i = 0; i < 16; i++) {
370 if (pnp_reserve_irq[i] == *irq)
371 return 0;
372 }
373
374 /* check for internal conflicts */
375 for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
376 if (tres != res && tres->flags & IORESOURCE_IRQ) {
377 if (tres->start == *irq)
378 return 0;
379 }
380 }
381
382 /* check if the resource is being used by a pci device */
383 if (pci_uses_irq(dev, *irq))
384 return 0;
385
386 /* check if the resource is already in use, skip if the
387 * device is active because it itself may be in use */
388 if (!dev->active) {
389 if (request_irq(*irq, pnp_test_handler,
390 IRQF_PROBE_SHARED, "pnp", NULL))
391 return 0;
392 free_irq(*irq, NULL);
393 }
394
395 /* check for conflicts with other pnp devices */
396 pnp_for_each_dev(tdev) {
397 if (tdev == dev)
398 continue;
399 for (i = 0;
400 (tres = pnp_get_resource(tdev, IORESOURCE_IRQ, i));
401 i++) {
402 if (tres->flags & IORESOURCE_IRQ) {
403 if (cannot_compare(tres->flags))
404 continue;
405 if (tres->start == *irq)
406 return 0;
407 }
408 }
409 }
410
411 return 1;
412}
413
414#ifdef CONFIG_ISA_DMA_API
415int pnp_check_dma(struct pnp_dev *dev, struct resource *res)
416{
417 int i;
418 struct pnp_dev *tdev;
419 struct resource *tres;
420 resource_size_t *dma;
421
422 dma = &res->start;
423
424 /* if the resource doesn't exist, don't complain about it */
425 if (cannot_compare(res->flags))
426 return 1;
427
428 /* check if the resource is valid */
429 if (*dma == 4 || *dma > 7)
430 return 0;
431
432 /* check if the resource is reserved */
433 for (i = 0; i < 8; i++) {
434 if (pnp_reserve_dma[i] == *dma)
435 return 0;
436 }
437
438 /* check for internal conflicts */
439 for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
440 if (tres != res && tres->flags & IORESOURCE_DMA) {
441 if (tres->start == *dma)
442 return 0;
443 }
444 }
445
446 /* check if the resource is already in use, skip if the
447 * device is active because it itself may be in use */
448 if (!dev->active) {
449 if (request_dma(*dma, "pnp"))
450 return 0;
451 free_dma(*dma);
452 }
453
454 /* check for conflicts with other pnp devices */
455 pnp_for_each_dev(tdev) {
456 if (tdev == dev)
457 continue;
458 for (i = 0;
459 (tres = pnp_get_resource(tdev, IORESOURCE_DMA, i));
460 i++) {
461 if (tres->flags & IORESOURCE_DMA) {
462 if (cannot_compare(tres->flags))
463 continue;
464 if (tres->start == *dma)
465 return 0;
466 }
467 }
468 }
469
470 return 1;
471}
472#endif /* CONFIG_ISA_DMA_API */
473
474unsigned long pnp_resource_type(struct resource *res)
475{
476 return res->flags & (IORESOURCE_IO | IORESOURCE_MEM |
477 IORESOURCE_IRQ | IORESOURCE_DMA |
478 IORESOURCE_BUS);
479}
480
481struct resource *pnp_get_resource(struct pnp_dev *dev,
482 unsigned long type, unsigned int num)
483{
484 struct pnp_resource *pnp_res;
485 struct resource *res;
486
487 list_for_each_entry(pnp_res, &dev->resources, list) {
488 res = &pnp_res->res;
489 if (pnp_resource_type(res) == type && num-- == 0)
490 return res;
491 }
492 return NULL;
493}
494EXPORT_SYMBOL(pnp_get_resource);
495
496static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
497{
498 struct pnp_resource *pnp_res;
499
500 pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
501 if (!pnp_res)
502 return NULL;
503
504 list_add_tail(&pnp_res->list, &dev->resources);
505 return pnp_res;
506}
507
508struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
509 struct resource *res)
510{
511 struct pnp_resource *pnp_res;
512
513 pnp_res = pnp_new_resource(dev);
514 if (!pnp_res) {
515 dev_err(&dev->dev, "can't add resource %pR\n", res);
516 return NULL;
517 }
518
519 pnp_res->res = *res;
520 pnp_res->res.name = dev->name;
521 dev_dbg(&dev->dev, "%pR\n", res);
522 return pnp_res;
523}
524
525struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
526 int flags)
527{
528 struct pnp_resource *pnp_res;
529 struct resource *res;
530
531 pnp_res = pnp_new_resource(dev);
532 if (!pnp_res) {
533 dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
534 return NULL;
535 }
536
537 res = &pnp_res->res;
538 res->flags = IORESOURCE_IRQ | flags;
539 res->start = irq;
540 res->end = irq;
541
542 dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
543 return pnp_res;
544}
545
546struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
547 int flags)
548{
549 struct pnp_resource *pnp_res;
550 struct resource *res;
551
552 pnp_res = pnp_new_resource(dev);
553 if (!pnp_res) {
554 dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
555 return NULL;
556 }
557
558 res = &pnp_res->res;
559 res->flags = IORESOURCE_DMA | flags;
560 res->start = dma;
561 res->end = dma;
562
563 dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
564 return pnp_res;
565}
566
567struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
568 resource_size_t start,
569 resource_size_t end, int flags)
570{
571 struct pnp_resource *pnp_res;
572 struct resource *res;
573
574 pnp_res = pnp_new_resource(dev);
575 if (!pnp_res) {
576 dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",
577 (unsigned long long) start,
578 (unsigned long long) end);
579 return NULL;
580 }
581
582 res = &pnp_res->res;
583 res->flags = IORESOURCE_IO | flags;
584 res->start = start;
585 res->end = end;
586
587 dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
588 return pnp_res;
589}
590
591struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
592 resource_size_t start,
593 resource_size_t end, int flags)
594{
595 struct pnp_resource *pnp_res;
596 struct resource *res;
597
598 pnp_res = pnp_new_resource(dev);
599 if (!pnp_res) {
600 dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",
601 (unsigned long long) start,
602 (unsigned long long) end);
603 return NULL;
604 }
605
606 res = &pnp_res->res;
607 res->flags = IORESOURCE_MEM | flags;
608 res->start = start;
609 res->end = end;
610
611 dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
612 return pnp_res;
613}
614
615struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
616 resource_size_t start,
617 resource_size_t end)
618{
619 struct pnp_resource *pnp_res;
620 struct resource *res;
621
622 pnp_res = pnp_new_resource(dev);
623 if (!pnp_res) {
624 dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n",
625 (unsigned long long) start,
626 (unsigned long long) end);
627 return NULL;
628 }
629
630 res = &pnp_res->res;
631 res->flags = IORESOURCE_BUS;
632 res->start = start;
633 res->end = end;
634
635 dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
636 return pnp_res;
637}
638
639/*
640 * Determine whether the specified resource is a possible configuration
641 * for this device.
642 */
643int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start,
644 resource_size_t size)
645{
646 struct pnp_option *option;
647 struct pnp_port *port;
648 struct pnp_mem *mem;
649 struct pnp_irq *irq;
650 struct pnp_dma *dma;
651
652 list_for_each_entry(option, &dev->options, list) {
653 if (option->type != type)
654 continue;
655
656 switch (option->type) {
657 case IORESOURCE_IO:
658 port = &option->u.port;
659 if (port->min == start && port->size == size)
660 return 1;
661 break;
662 case IORESOURCE_MEM:
663 mem = &option->u.mem;
664 if (mem->min == start && mem->size == size)
665 return 1;
666 break;
667 case IORESOURCE_IRQ:
668 irq = &option->u.irq;
669 if (start < PNP_IRQ_NR &&
670 test_bit(start, irq->map.bits))
671 return 1;
672 break;
673 case IORESOURCE_DMA:
674 dma = &option->u.dma;
675 if (dma->map & (1 << start))
676 return 1;
677 break;
678 }
679 }
680
681 return 0;
682}
683EXPORT_SYMBOL(pnp_possible_config);
684
685int pnp_range_reserved(resource_size_t start, resource_size_t end)
686{
687 struct pnp_dev *dev;
688 struct pnp_resource *pnp_res;
689 resource_size_t *dev_start, *dev_end;
690
691 pnp_for_each_dev(dev) {
692 list_for_each_entry(pnp_res, &dev->resources, list) {
693 dev_start = &pnp_res->res.start;
694 dev_end = &pnp_res->res.end;
695 if (ranged_conflict(&start, &end, dev_start, dev_end))
696 return 1;
697 }
698 }
699 return 0;
700}
701EXPORT_SYMBOL(pnp_range_reserved);
702
703/* format is: pnp_reserve_irq=irq1[,irq2] .... */
704static int __init pnp_setup_reserve_irq(char *str)
705{
706 int i;
707
708 for (i = 0; i < 16; i++)
709 if (get_option(&str, &pnp_reserve_irq[i]) != 2)
710 break;
711 return 1;
712}
713
714__setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
715
716/* format is: pnp_reserve_dma=dma1[,dma2] .... */
717static int __init pnp_setup_reserve_dma(char *str)
718{
719 int i;
720
721 for (i = 0; i < 8; i++)
722 if (get_option(&str, &pnp_reserve_dma[i]) != 2)
723 break;
724 return 1;
725}
726
727__setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
728
729/* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
730static int __init pnp_setup_reserve_io(char *str)
731{
732 int i;
733
734 for (i = 0; i < 16; i++)
735 if (get_option(&str, &pnp_reserve_io[i]) != 2)
736 break;
737 return 1;
738}
739
740__setup("pnp_reserve_io=", pnp_setup_reserve_io);
741
742/* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
743static int __init pnp_setup_reserve_mem(char *str)
744{
745 int i;
746
747 for (i = 0; i < 16; i++)
748 if (get_option(&str, &pnp_reserve_mem[i]) != 2)
749 break;
750 return 1;
751}
752
753__setup("pnp_reserve_mem=", pnp_setup_reserve_mem);