xref: /openbmc/linux/drivers/pnp/resource.c (revision ae85b23c)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * resource.c - Contains functions for registering and analyzing resource information
4  *
5  * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
6  * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
7  * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
8  *	Bjorn Helgaas <bjorn.helgaas@hp.com>
9  */
10 
11 #include <linux/module.h>
12 #include <linux/slab.h>
13 #include <linux/errno.h>
14 #include <linux/interrupt.h>
15 #include <linux/kernel.h>
16 #include <asm/io.h>
17 #include <asm/dma.h>
18 #include <asm/irq.h>
19 #include <linux/pci.h>
20 #include <linux/libata.h>
21 #include <linux/ioport.h>
22 #include <linux/init.h>
23 
24 #include <linux/pnp.h>
25 #include "base.h"
26 
27 static int pnp_reserve_irq[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some IRQ */
28 static int pnp_reserve_dma[8] = {[0 ... 7] = -1 };	/* reserve (don't use) some DMA */
29 static int pnp_reserve_io[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some I/O region */
30 static int pnp_reserve_mem[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some memory region */
31 
32 /*
33  * option registration
34  */
35 
pnp_build_option(struct pnp_dev * dev,unsigned long type,unsigned int option_flags)36 static struct pnp_option *pnp_build_option(struct pnp_dev *dev, unsigned long type,
37 				    unsigned int option_flags)
38 {
39 	struct pnp_option *option;
40 
41 	option = kzalloc(sizeof(struct pnp_option), GFP_KERNEL);
42 	if (!option)
43 		return NULL;
44 
45 	option->flags = option_flags;
46 	option->type = type;
47 
48 	list_add_tail(&option->list, &dev->options);
49 	return option;
50 }
51 
pnp_register_irq_resource(struct pnp_dev * dev,unsigned int option_flags,pnp_irq_mask_t * map,unsigned char flags)52 int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags,
53 			      pnp_irq_mask_t *map, unsigned char flags)
54 {
55 	struct pnp_option *option;
56 	struct pnp_irq *irq;
57 
58 	option = pnp_build_option(dev, IORESOURCE_IRQ, option_flags);
59 	if (!option)
60 		return -ENOMEM;
61 
62 	irq = &option->u.irq;
63 	irq->map = *map;
64 	irq->flags = flags;
65 
66 #ifdef CONFIG_PCI
67 	{
68 		int i;
69 
70 		for (i = 0; i < 16; i++)
71 			if (test_bit(i, irq->map.bits))
72 				pcibios_penalize_isa_irq(i, 0);
73 	}
74 #endif
75 
76 	dbg_pnp_show_option(dev, option);
77 	return 0;
78 }
79 
pnp_register_dma_resource(struct pnp_dev * dev,unsigned int option_flags,unsigned char map,unsigned char flags)80 int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags,
81 			      unsigned char map, unsigned char flags)
82 {
83 	struct pnp_option *option;
84 	struct pnp_dma *dma;
85 
86 	option = pnp_build_option(dev, IORESOURCE_DMA, option_flags);
87 	if (!option)
88 		return -ENOMEM;
89 
90 	dma = &option->u.dma;
91 	dma->map = map;
92 	dma->flags = flags;
93 
94 	dbg_pnp_show_option(dev, option);
95 	return 0;
96 }
97 
pnp_register_port_resource(struct pnp_dev * dev,unsigned int option_flags,resource_size_t min,resource_size_t max,resource_size_t align,resource_size_t size,unsigned char flags)98 int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags,
99 			       resource_size_t min, resource_size_t max,
100 			       resource_size_t align, resource_size_t size,
101 			       unsigned char flags)
102 {
103 	struct pnp_option *option;
104 	struct pnp_port *port;
105 
106 	option = pnp_build_option(dev, IORESOURCE_IO, option_flags);
107 	if (!option)
108 		return -ENOMEM;
109 
110 	port = &option->u.port;
111 	port->min = min;
112 	port->max = max;
113 	port->align = align;
114 	port->size = size;
115 	port->flags = flags;
116 
117 	dbg_pnp_show_option(dev, option);
118 	return 0;
119 }
120 
pnp_register_mem_resource(struct pnp_dev * dev,unsigned int option_flags,resource_size_t min,resource_size_t max,resource_size_t align,resource_size_t size,unsigned char flags)121 int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags,
122 			      resource_size_t min, resource_size_t max,
123 			      resource_size_t align, resource_size_t size,
124 			      unsigned char flags)
125 {
126 	struct pnp_option *option;
127 	struct pnp_mem *mem;
128 
129 	option = pnp_build_option(dev, IORESOURCE_MEM, option_flags);
130 	if (!option)
131 		return -ENOMEM;
132 
133 	mem = &option->u.mem;
134 	mem->min = min;
135 	mem->max = max;
136 	mem->align = align;
137 	mem->size = size;
138 	mem->flags = flags;
139 
140 	dbg_pnp_show_option(dev, option);
141 	return 0;
142 }
143 
pnp_free_options(struct pnp_dev * dev)144 void pnp_free_options(struct pnp_dev *dev)
145 {
146 	struct pnp_option *option, *tmp;
147 
148 	list_for_each_entry_safe(option, tmp, &dev->options, list) {
149 		list_del(&option->list);
150 		kfree(option);
151 	}
152 }
153 
154 /*
155  * resource validity checking
156  */
157 
158 #define length(start, end) (*(end) - *(start) + 1)
159 
160 /* Two ranges conflict if one doesn't end before the other starts */
161 #define ranged_conflict(starta, enda, startb, endb) \
162 	!((*(enda) < *(startb)) || (*(endb) < *(starta)))
163 
164 #define cannot_compare(flags) \
165 ((flags) & IORESOURCE_DISABLED)
166 
pnp_check_port(struct pnp_dev * dev,struct resource * res)167 int pnp_check_port(struct pnp_dev *dev, struct resource *res)
168 {
169 	int i;
170 	struct pnp_dev *tdev;
171 	struct resource *tres;
172 	resource_size_t *port, *end, *tport, *tend;
173 
174 	port = &res->start;
175 	end = &res->end;
176 
177 	/* if the resource doesn't exist, don't complain about it */
178 	if (cannot_compare(res->flags))
179 		return 1;
180 
181 	/* check if the resource is already in use, skip if the
182 	 * device is active because it itself may be in use */
183 	if (!dev->active) {
184 		if (!request_region(*port, length(port, end), "pnp"))
185 			return 0;
186 		release_region(*port, length(port, end));
187 	}
188 
189 	/* check if the resource is reserved */
190 	for (i = 0; i < 8; i++) {
191 		int rport = pnp_reserve_io[i << 1];
192 		int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;
193 		if (ranged_conflict(port, end, &rport, &rend))
194 			return 0;
195 	}
196 
197 	/* check for internal conflicts */
198 	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
199 		if (tres != res && tres->flags & IORESOURCE_IO) {
200 			tport = &tres->start;
201 			tend = &tres->end;
202 			if (ranged_conflict(port, end, tport, tend))
203 				return 0;
204 		}
205 	}
206 
207 	/* check for conflicts with other pnp devices */
208 	pnp_for_each_dev(tdev) {
209 		if (tdev == dev)
210 			continue;
211 		for (i = 0;
212 		     (tres = pnp_get_resource(tdev, IORESOURCE_IO, i));
213 		     i++) {
214 			if (tres->flags & IORESOURCE_IO) {
215 				if (cannot_compare(tres->flags))
216 					continue;
217 				if (tres->flags & IORESOURCE_WINDOW)
218 					continue;
219 				tport = &tres->start;
220 				tend = &tres->end;
221 				if (ranged_conflict(port, end, tport, tend))
222 					return 0;
223 			}
224 		}
225 	}
226 
227 	return 1;
228 }
229 
pnp_check_mem(struct pnp_dev * dev,struct resource * res)230 int pnp_check_mem(struct pnp_dev *dev, struct resource *res)
231 {
232 	int i;
233 	struct pnp_dev *tdev;
234 	struct resource *tres;
235 	resource_size_t *addr, *end, *taddr, *tend;
236 
237 	addr = &res->start;
238 	end = &res->end;
239 
240 	/* if the resource doesn't exist, don't complain about it */
241 	if (cannot_compare(res->flags))
242 		return 1;
243 
244 	/* check if the resource is already in use, skip if the
245 	 * device is active because it itself may be in use */
246 	if (!dev->active) {
247 		if (!request_mem_region(*addr, length(addr, end), "pnp"))
248 			return 0;
249 		release_mem_region(*addr, length(addr, end));
250 	}
251 
252 	/* check if the resource is reserved */
253 	for (i = 0; i < 8; i++) {
254 		int raddr = pnp_reserve_mem[i << 1];
255 		int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;
256 		if (ranged_conflict(addr, end, &raddr, &rend))
257 			return 0;
258 	}
259 
260 	/* check for internal conflicts */
261 	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
262 		if (tres != res && tres->flags & IORESOURCE_MEM) {
263 			taddr = &tres->start;
264 			tend = &tres->end;
265 			if (ranged_conflict(addr, end, taddr, tend))
266 				return 0;
267 		}
268 	}
269 
270 	/* check for conflicts with other pnp devices */
271 	pnp_for_each_dev(tdev) {
272 		if (tdev == dev)
273 			continue;
274 		for (i = 0;
275 		     (tres = pnp_get_resource(tdev, IORESOURCE_MEM, i));
276 		     i++) {
277 			if (tres->flags & IORESOURCE_MEM) {
278 				if (cannot_compare(tres->flags))
279 					continue;
280 				if (tres->flags & IORESOURCE_WINDOW)
281 					continue;
282 				taddr = &tres->start;
283 				tend = &tres->end;
284 				if (ranged_conflict(addr, end, taddr, tend))
285 					return 0;
286 			}
287 		}
288 	}
289 
290 	return 1;
291 }
292 
pnp_test_handler(int irq,void * dev_id)293 static irqreturn_t pnp_test_handler(int irq, void *dev_id)
294 {
295 	return IRQ_HANDLED;
296 }
297 
298 #ifdef CONFIG_PCI
pci_dev_uses_irq(struct pnp_dev * pnp,struct pci_dev * pci,unsigned int irq)299 static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci,
300 			    unsigned int irq)
301 {
302 	u32 class;
303 	u8 progif;
304 
305 	if (pci->irq == irq) {
306 		pnp_dbg(&pnp->dev, "  device %s using irq %d\n",
307 			pci_name(pci), irq);
308 		return 1;
309 	}
310 
311 	/*
312 	 * See pci_setup_device() and ata_pci_sff_activate_host() for
313 	 * similar IDE legacy detection.
314 	 */
315 	pci_read_config_dword(pci, PCI_CLASS_REVISION, &class);
316 	class >>= 8;		/* discard revision ID */
317 	progif = class & 0xff;
318 	class >>= 8;
319 
320 	if (class == PCI_CLASS_STORAGE_IDE) {
321 		/*
322 		 * Unless both channels are native-PCI mode only,
323 		 * treat the compatibility IRQs as busy.
324 		 */
325 		if ((progif & 0x5) != 0x5)
326 			if (ATA_PRIMARY_IRQ(pci) == irq ||
327 			    ATA_SECONDARY_IRQ(pci) == irq) {
328 				pnp_dbg(&pnp->dev, "  legacy IDE device %s "
329 					"using irq %d\n", pci_name(pci), irq);
330 				return 1;
331 			}
332 	}
333 
334 	return 0;
335 }
336 #endif
337 
pci_uses_irq(struct pnp_dev * pnp,unsigned int irq)338 static int pci_uses_irq(struct pnp_dev *pnp, unsigned int irq)
339 {
340 #ifdef CONFIG_PCI
341 	struct pci_dev *pci = NULL;
342 
343 	for_each_pci_dev(pci) {
344 		if (pci_dev_uses_irq(pnp, pci, irq)) {
345 			pci_dev_put(pci);
346 			return 1;
347 		}
348 	}
349 #endif
350 	return 0;
351 }
352 
pnp_check_irq(struct pnp_dev * dev,struct resource * res)353 int pnp_check_irq(struct pnp_dev *dev, struct resource *res)
354 {
355 	int i;
356 	struct pnp_dev *tdev;
357 	struct resource *tres;
358 	resource_size_t *irq;
359 
360 	irq = &res->start;
361 
362 	/* if the resource doesn't exist, don't complain about it */
363 	if (cannot_compare(res->flags))
364 		return 1;
365 
366 	/* check if the resource is valid */
367 	if (*irq > 15)
368 		return 0;
369 
370 	/* check if the resource is reserved */
371 	for (i = 0; i < 16; i++) {
372 		if (pnp_reserve_irq[i] == *irq)
373 			return 0;
374 	}
375 
376 	/* check for internal conflicts */
377 	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
378 		if (tres != res && tres->flags & IORESOURCE_IRQ) {
379 			if (tres->start == *irq)
380 				return 0;
381 		}
382 	}
383 
384 	/* check if the resource is being used by a pci device */
385 	if (pci_uses_irq(dev, *irq))
386 		return 0;
387 
388 	/* check if the resource is already in use, skip if the
389 	 * device is active because it itself may be in use */
390 	if (!dev->active) {
391 		if (request_irq(*irq, pnp_test_handler,
392 				IRQF_PROBE_SHARED, "pnp", NULL))
393 			return 0;
394 		free_irq(*irq, NULL);
395 	}
396 
397 	/* check for conflicts with other pnp devices */
398 	pnp_for_each_dev(tdev) {
399 		if (tdev == dev)
400 			continue;
401 		for (i = 0;
402 		     (tres = pnp_get_resource(tdev, IORESOURCE_IRQ, i));
403 		     i++) {
404 			if (tres->flags & IORESOURCE_IRQ) {
405 				if (cannot_compare(tres->flags))
406 					continue;
407 				if (tres->start == *irq)
408 					return 0;
409 			}
410 		}
411 	}
412 
413 	return 1;
414 }
415 
416 #ifdef CONFIG_ISA_DMA_API
pnp_check_dma(struct pnp_dev * dev,struct resource * res)417 int pnp_check_dma(struct pnp_dev *dev, struct resource *res)
418 {
419 	int i;
420 	struct pnp_dev *tdev;
421 	struct resource *tres;
422 	resource_size_t *dma;
423 
424 	dma = &res->start;
425 
426 	/* if the resource doesn't exist, don't complain about it */
427 	if (cannot_compare(res->flags))
428 		return 1;
429 
430 	/* check if the resource is valid */
431 	if (*dma == 4 || *dma > 7)
432 		return 0;
433 
434 	/* check if the resource is reserved */
435 	for (i = 0; i < 8; i++) {
436 		if (pnp_reserve_dma[i] == *dma)
437 			return 0;
438 	}
439 
440 	/* check for internal conflicts */
441 	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
442 		if (tres != res && tres->flags & IORESOURCE_DMA) {
443 			if (tres->start == *dma)
444 				return 0;
445 		}
446 	}
447 
448 	/* check if the resource is already in use, skip if the
449 	 * device is active because it itself may be in use */
450 	if (!dev->active) {
451 		if (request_dma(*dma, "pnp"))
452 			return 0;
453 		free_dma(*dma);
454 	}
455 
456 	/* check for conflicts with other pnp devices */
457 	pnp_for_each_dev(tdev) {
458 		if (tdev == dev)
459 			continue;
460 		for (i = 0;
461 		     (tres = pnp_get_resource(tdev, IORESOURCE_DMA, i));
462 		     i++) {
463 			if (tres->flags & IORESOURCE_DMA) {
464 				if (cannot_compare(tres->flags))
465 					continue;
466 				if (tres->start == *dma)
467 					return 0;
468 			}
469 		}
470 	}
471 
472 	return 1;
473 }
474 #endif /* CONFIG_ISA_DMA_API */
475 
pnp_resource_type(struct resource * res)476 unsigned long pnp_resource_type(struct resource *res)
477 {
478 	return res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |
479 			     IORESOURCE_IRQ | IORESOURCE_DMA |
480 			     IORESOURCE_BUS);
481 }
482 
pnp_get_resource(struct pnp_dev * dev,unsigned long type,unsigned int num)483 struct resource *pnp_get_resource(struct pnp_dev *dev,
484 				  unsigned long type, unsigned int num)
485 {
486 	struct pnp_resource *pnp_res;
487 	struct resource *res;
488 
489 	list_for_each_entry(pnp_res, &dev->resources, list) {
490 		res = &pnp_res->res;
491 		if (pnp_resource_type(res) == type && num-- == 0)
492 			return res;
493 	}
494 	return NULL;
495 }
496 EXPORT_SYMBOL(pnp_get_resource);
497 
pnp_new_resource(struct pnp_dev * dev)498 static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
499 {
500 	struct pnp_resource *pnp_res;
501 
502 	pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
503 	if (!pnp_res)
504 		return NULL;
505 
506 	list_add_tail(&pnp_res->list, &dev->resources);
507 	return pnp_res;
508 }
509 
pnp_add_resource(struct pnp_dev * dev,struct resource * res)510 struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
511 				      struct resource *res)
512 {
513 	struct pnp_resource *pnp_res;
514 
515 	pnp_res = pnp_new_resource(dev);
516 	if (!pnp_res) {
517 		dev_err(&dev->dev, "can't add resource %pR\n", res);
518 		return NULL;
519 	}
520 
521 	pnp_res->res = *res;
522 	pnp_res->res.name = dev->name;
523 	dev_dbg(&dev->dev, "%pR\n", res);
524 	return pnp_res;
525 }
526 
pnp_add_irq_resource(struct pnp_dev * dev,int irq,int flags)527 struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
528 					  int flags)
529 {
530 	struct pnp_resource *pnp_res;
531 	struct resource *res;
532 
533 	pnp_res = pnp_new_resource(dev);
534 	if (!pnp_res) {
535 		dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
536 		return NULL;
537 	}
538 
539 	res = &pnp_res->res;
540 	res->flags = IORESOURCE_IRQ | flags;
541 	res->start = irq;
542 	res->end = irq;
543 
544 	dev_dbg(&dev->dev, "%pR\n", res);
545 	return pnp_res;
546 }
547 
pnp_add_dma_resource(struct pnp_dev * dev,int dma,int flags)548 struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
549 					  int flags)
550 {
551 	struct pnp_resource *pnp_res;
552 	struct resource *res;
553 
554 	pnp_res = pnp_new_resource(dev);
555 	if (!pnp_res) {
556 		dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
557 		return NULL;
558 	}
559 
560 	res = &pnp_res->res;
561 	res->flags = IORESOURCE_DMA | flags;
562 	res->start = dma;
563 	res->end = dma;
564 
565 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
566 	return pnp_res;
567 }
568 
pnp_add_io_resource(struct pnp_dev * dev,resource_size_t start,resource_size_t end,int flags)569 struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
570 					 resource_size_t start,
571 					 resource_size_t end, int flags)
572 {
573 	struct pnp_resource *pnp_res;
574 	struct resource *res;
575 
576 	pnp_res = pnp_new_resource(dev);
577 	if (!pnp_res) {
578 		dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",
579 			(unsigned long long) start,
580 			(unsigned long long) end);
581 		return NULL;
582 	}
583 
584 	res = &pnp_res->res;
585 	res->flags = IORESOURCE_IO | flags;
586 	res->start = start;
587 	res->end = end;
588 
589 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
590 	return pnp_res;
591 }
592 
pnp_add_mem_resource(struct pnp_dev * dev,resource_size_t start,resource_size_t end,int flags)593 struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
594 					  resource_size_t start,
595 					  resource_size_t end, int flags)
596 {
597 	struct pnp_resource *pnp_res;
598 	struct resource *res;
599 
600 	pnp_res = pnp_new_resource(dev);
601 	if (!pnp_res) {
602 		dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",
603 			(unsigned long long) start,
604 			(unsigned long long) end);
605 		return NULL;
606 	}
607 
608 	res = &pnp_res->res;
609 	res->flags = IORESOURCE_MEM | flags;
610 	res->start = start;
611 	res->end = end;
612 
613 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
614 	return pnp_res;
615 }
616 
pnp_add_bus_resource(struct pnp_dev * dev,resource_size_t start,resource_size_t end)617 struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
618 					  resource_size_t start,
619 					  resource_size_t end)
620 {
621 	struct pnp_resource *pnp_res;
622 	struct resource *res;
623 
624 	pnp_res = pnp_new_resource(dev);
625 	if (!pnp_res) {
626 		dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n",
627 			(unsigned long long) start,
628 			(unsigned long long) end);
629 		return NULL;
630 	}
631 
632 	res = &pnp_res->res;
633 	res->flags = IORESOURCE_BUS;
634 	res->start = start;
635 	res->end = end;
636 
637 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
638 	return pnp_res;
639 }
640 
641 /*
642  * Determine whether the specified resource is a possible configuration
643  * for this device.
644  */
pnp_possible_config(struct pnp_dev * dev,int type,resource_size_t start,resource_size_t size)645 int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start,
646 			resource_size_t size)
647 {
648 	struct pnp_option *option;
649 	struct pnp_port *port;
650 	struct pnp_mem *mem;
651 	struct pnp_irq *irq;
652 	struct pnp_dma *dma;
653 
654 	list_for_each_entry(option, &dev->options, list) {
655 		if (option->type != type)
656 			continue;
657 
658 		switch (option->type) {
659 		case IORESOURCE_IO:
660 			port = &option->u.port;
661 			if (port->min == start && port->size == size)
662 				return 1;
663 			break;
664 		case IORESOURCE_MEM:
665 			mem = &option->u.mem;
666 			if (mem->min == start && mem->size == size)
667 				return 1;
668 			break;
669 		case IORESOURCE_IRQ:
670 			irq = &option->u.irq;
671 			if (start < PNP_IRQ_NR &&
672 			    test_bit(start, irq->map.bits))
673 				return 1;
674 			break;
675 		case IORESOURCE_DMA:
676 			dma = &option->u.dma;
677 			if (dma->map & (1 << start))
678 				return 1;
679 			break;
680 		}
681 	}
682 
683 	return 0;
684 }
685 EXPORT_SYMBOL(pnp_possible_config);
686 
pnp_range_reserved(resource_size_t start,resource_size_t end)687 int pnp_range_reserved(resource_size_t start, resource_size_t end)
688 {
689 	struct pnp_dev *dev;
690 	struct pnp_resource *pnp_res;
691 	resource_size_t *dev_start, *dev_end;
692 
693 	pnp_for_each_dev(dev) {
694 		list_for_each_entry(pnp_res, &dev->resources, list) {
695 			dev_start = &pnp_res->res.start;
696 			dev_end   = &pnp_res->res.end;
697 			if (ranged_conflict(&start, &end, dev_start, dev_end))
698 				return 1;
699 		}
700 	}
701 	return 0;
702 }
703 EXPORT_SYMBOL(pnp_range_reserved);
704 
705 /* format is: pnp_reserve_irq=irq1[,irq2] .... */
pnp_setup_reserve_irq(char * str)706 static int __init pnp_setup_reserve_irq(char *str)
707 {
708 	int i;
709 
710 	for (i = 0; i < 16; i++)
711 		if (get_option(&str, &pnp_reserve_irq[i]) != 2)
712 			break;
713 	return 1;
714 }
715 
716 __setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
717 
718 /* format is: pnp_reserve_dma=dma1[,dma2] .... */
pnp_setup_reserve_dma(char * str)719 static int __init pnp_setup_reserve_dma(char *str)
720 {
721 	int i;
722 
723 	for (i = 0; i < 8; i++)
724 		if (get_option(&str, &pnp_reserve_dma[i]) != 2)
725 			break;
726 	return 1;
727 }
728 
729 __setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
730 
731 /* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
pnp_setup_reserve_io(char * str)732 static int __init pnp_setup_reserve_io(char *str)
733 {
734 	int i;
735 
736 	for (i = 0; i < 16; i++)
737 		if (get_option(&str, &pnp_reserve_io[i]) != 2)
738 			break;
739 	return 1;
740 }
741 
742 __setup("pnp_reserve_io=", pnp_setup_reserve_io);
743 
744 /* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
pnp_setup_reserve_mem(char * str)745 static int __init pnp_setup_reserve_mem(char *str)
746 {
747 	int i;
748 
749 	for (i = 0; i < 16; i++)
750 		if (get_option(&str, &pnp_reserve_mem[i]) != 2)
751 			break;
752 	return 1;
753 }
754 
755 __setup("pnp_reserve_mem=", pnp_setup_reserve_mem);
756