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 | |
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(size: 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(new: &option->list, head: &dev->options); |
49 | return option; |
50 | } |
51 | |
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(irq: i, active: 0); |
73 | } |
74 | #endif |
75 | |
76 | dbg_pnp_show_option(dev, option); |
77 | return 0; |
78 | } |
79 | |
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 | |
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 | |
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 | |
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(entry: &option->list); |
150 | kfree(objp: 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 | |
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, num: 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(dev: tdev, IORESOURCE_IO, num: 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 | |
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, num: 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(dev: tdev, IORESOURCE_MEM, num: 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 | |
293 | static irqreturn_t pnp_test_handler(int irq, void *dev_id) |
294 | { |
295 | return IRQ_HANDLED; |
296 | } |
297 | |
298 | #ifdef CONFIG_PCI |
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(dev: pci, PCI_CLASS_REVISION, val: &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 | |
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(dev: pci); |
346 | return 1; |
347 | } |
348 | } |
349 | #endif |
350 | return 0; |
351 | } |
352 | |
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, num: 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(pnp: dev, irq: *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: *irq, handler: pnp_test_handler, |
392 | IRQF_PROBE_SHARED, name: "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(dev: tdev, IORESOURCE_IRQ, num: 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 |
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, num: 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(dmanr: *dma, device_id: "pnp" )) |
452 | return 0; |
453 | free_dma(dmanr: *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(dev: tdev, IORESOURCE_DMA, num: 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 | |
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 | |
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 | |
498 | static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev) |
499 | { |
500 | struct pnp_resource *pnp_res; |
501 | |
502 | pnp_res = kzalloc(size: sizeof(struct pnp_resource), GFP_KERNEL); |
503 | if (!pnp_res) |
504 | return NULL; |
505 | |
506 | list_add_tail(new: &pnp_res->list, head: &dev->resources); |
507 | return pnp_res; |
508 | } |
509 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | */ |
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 | |
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] .... */ |
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: &str, pint: &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] .... */ |
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: &str, pint: &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] .... */ |
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: &str, pint: &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] .... */ |
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: &str, pint: &pnp_reserve_mem[i]) != 2) |
751 | break; |
752 | return 1; |
753 | } |
754 | |
755 | __setup("pnp_reserve_mem=" , pnp_setup_reserve_mem); |
756 | |