vsprintf: use %pR, %pr instead of %pRt, %pRf
[linux-2.6.git] / drivers / pnp / resource.c
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/errno.h>
12 #include <linux/interrupt.h>
13 #include <linux/kernel.h>
14 #include <asm/io.h>
15 #include <asm/dma.h>
16 #include <asm/irq.h>
17 #include <linux/pci.h>
18 #include <linux/ioport.h>
19 #include <linux/init.h>
20
21 #include <linux/pnp.h>
22 #include "base.h"
23
24 static int pnp_reserve_irq[16] = {[0 ... 15] = -1 };    /* reserve (don't use) some IRQ */
25 static int pnp_reserve_dma[8] = {[0 ... 7] = -1 };      /* reserve (don't use) some DMA */
26 static int pnp_reserve_io[16] = {[0 ... 15] = -1 };     /* reserve (don't use) some I/O region */
27 static int pnp_reserve_mem[16] = {[0 ... 15] = -1 };    /* reserve (don't use) some memory region */
28
29 /*
30  * option registration
31  */
32
33 struct pnp_option *pnp_build_option(struct pnp_dev *dev, unsigned long type,
34                                     unsigned int option_flags)
35 {
36         struct pnp_option *option;
37
38         option = kzalloc(sizeof(struct pnp_option), GFP_KERNEL);
39         if (!option)
40                 return NULL;
41
42         option->flags = option_flags;
43         option->type = type;
44
45         list_add_tail(&option->list, &dev->options);
46         return option;
47 }
48
49 int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags,
50                               pnp_irq_mask_t *map, unsigned char flags)
51 {
52         struct pnp_option *option;
53         struct pnp_irq *irq;
54
55         option = pnp_build_option(dev, IORESOURCE_IRQ, option_flags);
56         if (!option)
57                 return -ENOMEM;
58
59         irq = &option->u.irq;
60         irq->map = *map;
61         irq->flags = flags;
62
63 #ifdef CONFIG_PCI
64         {
65                 int i;
66
67                 for (i = 0; i < 16; i++)
68                         if (test_bit(i, irq->map.bits))
69                                 pcibios_penalize_isa_irq(i, 0);
70         }
71 #endif
72
73         dbg_pnp_show_option(dev, option);
74         return 0;
75 }
76
77 int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags,
78                               unsigned char map, unsigned char flags)
79 {
80         struct pnp_option *option;
81         struct pnp_dma *dma;
82
83         option = pnp_build_option(dev, IORESOURCE_DMA, option_flags);
84         if (!option)
85                 return -ENOMEM;
86
87         dma = &option->u.dma;
88         dma->map = map;
89         dma->flags = flags;
90
91         dbg_pnp_show_option(dev, option);
92         return 0;
93 }
94
95 int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags,
96                                resource_size_t min, resource_size_t max,
97                                resource_size_t align, resource_size_t size,
98                                unsigned char flags)
99 {
100         struct pnp_option *option;
101         struct pnp_port *port;
102
103         option = pnp_build_option(dev, IORESOURCE_IO, option_flags);
104         if (!option)
105                 return -ENOMEM;
106
107         port = &option->u.port;
108         port->min = min;
109         port->max = max;
110         port->align = align;
111         port->size = size;
112         port->flags = flags;
113
114         dbg_pnp_show_option(dev, option);
115         return 0;
116 }
117
118 int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags,
119                               resource_size_t min, resource_size_t max,
120                               resource_size_t align, resource_size_t size,
121                               unsigned char flags)
122 {
123         struct pnp_option *option;
124         struct pnp_mem *mem;
125
126         option = pnp_build_option(dev, IORESOURCE_MEM, option_flags);
127         if (!option)
128                 return -ENOMEM;
129
130         mem = &option->u.mem;
131         mem->min = min;
132         mem->max = max;
133         mem->align = align;
134         mem->size = size;
135         mem->flags = flags;
136
137         dbg_pnp_show_option(dev, option);
138         return 0;
139 }
140
141 void pnp_free_options(struct pnp_dev *dev)
142 {
143         struct pnp_option *option, *tmp;
144
145         list_for_each_entry_safe(option, tmp, &dev->options, list) {
146                 list_del(&option->list);
147                 kfree(option);
148         }
149 }
150
151 /*
152  * resource validity checking
153  */
154
155 #define length(start, end) (*(end) - *(start) + 1)
156
157 /* Two ranges conflict if one doesn't end before the other starts */
158 #define ranged_conflict(starta, enda, startb, endb) \
159         !((*(enda) < *(startb)) || (*(endb) < *(starta)))
160
161 #define cannot_compare(flags) \
162 ((flags) & IORESOURCE_DISABLED)
163
164 int pnp_check_port(struct pnp_dev *dev, struct resource *res)
165 {
166         int i;
167         struct pnp_dev *tdev;
168         struct resource *tres;
169         resource_size_t *port, *end, *tport, *tend;
170
171         port = &res->start;
172         end = &res->end;
173
174         /* if the resource doesn't exist, don't complain about it */
175         if (cannot_compare(res->flags))
176                 return 1;
177
178         /* check if the resource is already in use, skip if the
179          * device is active because it itself may be in use */
180         if (!dev->active) {
181                 if (__check_region(&ioport_resource, *port, length(port, end)))
182                         return 0;
183         }
184
185         /* check if the resource is reserved */
186         for (i = 0; i < 8; i++) {
187                 int rport = pnp_reserve_io[i << 1];
188                 int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;
189                 if (ranged_conflict(port, end, &rport, &rend))
190                         return 0;
191         }
192
193         /* check for internal conflicts */
194         for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
195                 if (tres != res && tres->flags & IORESOURCE_IO) {
196                         tport = &tres->start;
197                         tend = &tres->end;
198                         if (ranged_conflict(port, end, tport, tend))
199                                 return 0;
200                 }
201         }
202
203         /* check for conflicts with other pnp devices */
204         pnp_for_each_dev(tdev) {
205                 if (tdev == dev)
206                         continue;
207                 for (i = 0;
208                      (tres = pnp_get_resource(tdev, IORESOURCE_IO, i));
209                      i++) {
210                         if (tres->flags & IORESOURCE_IO) {
211                                 if (cannot_compare(tres->flags))
212                                         continue;
213                                 tport = &tres->start;
214                                 tend = &tres->end;
215                                 if (ranged_conflict(port, end, tport, tend))
216                                         return 0;
217                         }
218                 }
219         }
220
221         return 1;
222 }
223
224 int pnp_check_mem(struct pnp_dev *dev, struct resource *res)
225 {
226         int i;
227         struct pnp_dev *tdev;
228         struct resource *tres;
229         resource_size_t *addr, *end, *taddr, *tend;
230
231         addr = &res->start;
232         end = &res->end;
233
234         /* if the resource doesn't exist, don't complain about it */
235         if (cannot_compare(res->flags))
236                 return 1;
237
238         /* check if the resource is already in use, skip if the
239          * device is active because it itself may be in use */
240         if (!dev->active) {
241                 if (check_mem_region(*addr, length(addr, end)))
242                         return 0;
243         }
244
245         /* check if the resource is reserved */
246         for (i = 0; i < 8; i++) {
247                 int raddr = pnp_reserve_mem[i << 1];
248                 int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;
249                 if (ranged_conflict(addr, end, &raddr, &rend))
250                         return 0;
251         }
252
253         /* check for internal conflicts */
254         for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
255                 if (tres != res && tres->flags & IORESOURCE_MEM) {
256                         taddr = &tres->start;
257                         tend = &tres->end;
258                         if (ranged_conflict(addr, end, taddr, tend))
259                                 return 0;
260                 }
261         }
262
263         /* check for conflicts with other pnp devices */
264         pnp_for_each_dev(tdev) {
265                 if (tdev == dev)
266                         continue;
267                 for (i = 0;
268                      (tres = pnp_get_resource(tdev, IORESOURCE_MEM, i));
269                      i++) {
270                         if (tres->flags & IORESOURCE_MEM) {
271                                 if (cannot_compare(tres->flags))
272                                         continue;
273                                 taddr = &tres->start;
274                                 tend = &tres->end;
275                                 if (ranged_conflict(addr, end, taddr, tend))
276                                         return 0;
277                         }
278                 }
279         }
280
281         return 1;
282 }
283
284 static irqreturn_t pnp_test_handler(int irq, void *dev_id)
285 {
286         return IRQ_HANDLED;
287 }
288
289 #ifdef CONFIG_PCI
290 static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci,
291                             unsigned int irq)
292 {
293         u32 class;
294         u8 progif;
295
296         if (pci->irq == irq) {
297                 pnp_dbg(&pnp->dev, "  device %s using irq %d\n",
298                         pci_name(pci), irq);
299                 return 1;
300         }
301
302         /*
303          * See pci_setup_device() and ata_pci_sff_activate_host() for
304          * similar IDE legacy detection.
305          */
306         pci_read_config_dword(pci, PCI_CLASS_REVISION, &class);
307         class >>= 8;            /* discard revision ID */
308         progif = class & 0xff;
309         class >>= 8;
310
311         if (class == PCI_CLASS_STORAGE_IDE) {
312                 /*
313                  * Unless both channels are native-PCI mode only,
314                  * treat the compatibility IRQs as busy.
315                  */
316                 if ((progif & 0x5) != 0x5)
317                         if (pci_get_legacy_ide_irq(pci, 0) == irq ||
318                             pci_get_legacy_ide_irq(pci, 1) == irq) {
319                                 pnp_dbg(&pnp->dev, "  legacy IDE device %s "
320                                         "using irq %d\n", pci_name(pci), irq);
321                                 return 1;
322                         }
323         }
324
325         return 0;
326 }
327 #endif
328
329 static int pci_uses_irq(struct pnp_dev *pnp, unsigned int irq)
330 {
331 #ifdef CONFIG_PCI
332         struct pci_dev *pci = NULL;
333
334         for_each_pci_dev(pci) {
335                 if (pci_dev_uses_irq(pnp, pci, irq)) {
336                         pci_dev_put(pci);
337                         return 1;
338                 }
339         }
340 #endif
341         return 0;
342 }
343
344 int pnp_check_irq(struct pnp_dev *dev, struct resource *res)
345 {
346         int i;
347         struct pnp_dev *tdev;
348         struct resource *tres;
349         resource_size_t *irq;
350
351         irq = &res->start;
352
353         /* if the resource doesn't exist, don't complain about it */
354         if (cannot_compare(res->flags))
355                 return 1;
356
357         /* check if the resource is valid */
358         if (*irq < 0 || *irq > 15)
359                 return 0;
360
361         /* check if the resource is reserved */
362         for (i = 0; i < 16; i++) {
363                 if (pnp_reserve_irq[i] == *irq)
364                         return 0;
365         }
366
367         /* check for internal conflicts */
368         for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
369                 if (tres != res && tres->flags & IORESOURCE_IRQ) {
370                         if (tres->start == *irq)
371                                 return 0;
372                 }
373         }
374
375         /* check if the resource is being used by a pci device */
376         if (pci_uses_irq(dev, *irq))
377                 return 0;
378
379         /* check if the resource is already in use, skip if the
380          * device is active because it itself may be in use */
381         if (!dev->active) {
382                 if (request_irq(*irq, pnp_test_handler,
383                                 IRQF_DISABLED | IRQF_PROBE_SHARED, "pnp", NULL))
384                         return 0;
385                 free_irq(*irq, NULL);
386         }
387
388         /* check for conflicts with other pnp devices */
389         pnp_for_each_dev(tdev) {
390                 if (tdev == dev)
391                         continue;
392                 for (i = 0;
393                      (tres = pnp_get_resource(tdev, IORESOURCE_IRQ, i));
394                      i++) {
395                         if (tres->flags & IORESOURCE_IRQ) {
396                                 if (cannot_compare(tres->flags))
397                                         continue;
398                                 if (tres->start == *irq)
399                                         return 0;
400                         }
401                 }
402         }
403
404         return 1;
405 }
406
407 int pnp_check_dma(struct pnp_dev *dev, struct resource *res)
408 {
409 #ifndef CONFIG_IA64
410         int i;
411         struct pnp_dev *tdev;
412         struct resource *tres;
413         resource_size_t *dma;
414
415         dma = &res->start;
416
417         /* if the resource doesn't exist, don't complain about it */
418         if (cannot_compare(res->flags))
419                 return 1;
420
421         /* check if the resource is valid */
422         if (*dma < 0 || *dma == 4 || *dma > 7)
423                 return 0;
424
425         /* check if the resource is reserved */
426         for (i = 0; i < 8; i++) {
427                 if (pnp_reserve_dma[i] == *dma)
428                         return 0;
429         }
430
431         /* check for internal conflicts */
432         for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
433                 if (tres != res && tres->flags & IORESOURCE_DMA) {
434                         if (tres->start == *dma)
435                                 return 0;
436                 }
437         }
438
439         /* check if the resource is already in use, skip if the
440          * device is active because it itself may be in use */
441         if (!dev->active) {
442                 if (request_dma(*dma, "pnp"))
443                         return 0;
444                 free_dma(*dma);
445         }
446
447         /* check for conflicts with other pnp devices */
448         pnp_for_each_dev(tdev) {
449                 if (tdev == dev)
450                         continue;
451                 for (i = 0;
452                      (tres = pnp_get_resource(tdev, IORESOURCE_DMA, i));
453                      i++) {
454                         if (tres->flags & IORESOURCE_DMA) {
455                                 if (cannot_compare(tres->flags))
456                                         continue;
457                                 if (tres->start == *dma)
458                                         return 0;
459                         }
460                 }
461         }
462
463         return 1;
464 #else
465         /* IA64 does not have legacy DMA */
466         return 0;
467 #endif
468 }
469
470 unsigned long pnp_resource_type(struct resource *res)
471 {
472         return res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |
473                              IORESOURCE_IRQ | IORESOURCE_DMA);
474 }
475
476 struct resource *pnp_get_resource(struct pnp_dev *dev,
477                                   unsigned long type, unsigned int num)
478 {
479         struct pnp_resource *pnp_res;
480         struct resource *res;
481
482         list_for_each_entry(pnp_res, &dev->resources, list) {
483                 res = &pnp_res->res;
484                 if (pnp_resource_type(res) == type && num-- == 0)
485                         return res;
486         }
487         return NULL;
488 }
489 EXPORT_SYMBOL(pnp_get_resource);
490
491 static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
492 {
493         struct pnp_resource *pnp_res;
494
495         pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
496         if (!pnp_res)
497                 return NULL;
498
499         list_add_tail(&pnp_res->list, &dev->resources);
500         return pnp_res;
501 }
502
503 struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
504                                           int flags)
505 {
506         struct pnp_resource *pnp_res;
507         struct resource *res;
508
509         pnp_res = pnp_new_resource(dev);
510         if (!pnp_res) {
511                 dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
512                 return NULL;
513         }
514
515         res = &pnp_res->res;
516         res->flags = IORESOURCE_IRQ | flags;
517         res->start = irq;
518         res->end = irq;
519
520         pnp_dbg(&dev->dev, "  add %pr\n", res);
521         return pnp_res;
522 }
523
524 struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
525                                           int flags)
526 {
527         struct pnp_resource *pnp_res;
528         struct resource *res;
529
530         pnp_res = pnp_new_resource(dev);
531         if (!pnp_res) {
532                 dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
533                 return NULL;
534         }
535
536         res = &pnp_res->res;
537         res->flags = IORESOURCE_DMA | flags;
538         res->start = dma;
539         res->end = dma;
540
541         pnp_dbg(&dev->dev, "  add %pr\n", res);
542         return pnp_res;
543 }
544
545 struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
546                                          resource_size_t start,
547                                          resource_size_t end, 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 IO %#llx-%#llx\n",
555                         (unsigned long long) start,
556                         (unsigned long long) end);
557                 return NULL;
558         }
559
560         res = &pnp_res->res;
561         res->flags = IORESOURCE_IO | flags;
562         res->start = start;
563         res->end = end;
564
565         pnp_dbg(&dev->dev, "  add %pr\n", res);
566         return pnp_res;
567 }
568
569 struct pnp_resource *pnp_add_mem_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 MEM %#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_MEM | flags;
586         res->start = start;
587         res->end = end;
588
589         pnp_dbg(&dev->dev, "  add %pr\n", res);
590         return pnp_res;
591 }
592
593 /*
594  * Determine whether the specified resource is a possible configuration
595  * for this device.
596  */
597 int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start,
598                         resource_size_t size)
599 {
600         struct pnp_option *option;
601         struct pnp_port *port;
602         struct pnp_mem *mem;
603         struct pnp_irq *irq;
604         struct pnp_dma *dma;
605
606         list_for_each_entry(option, &dev->options, list) {
607                 if (option->type != type)
608                         continue;
609
610                 switch (option->type) {
611                 case IORESOURCE_IO:
612                         port = &option->u.port;
613                         if (port->min == start && port->size == size)
614                                 return 1;
615                         break;
616                 case IORESOURCE_MEM:
617                         mem = &option->u.mem;
618                         if (mem->min == start && mem->size == size)
619                                 return 1;
620                         break;
621                 case IORESOURCE_IRQ:
622                         irq = &option->u.irq;
623                         if (start < PNP_IRQ_NR &&
624                             test_bit(start, irq->map.bits))
625                                 return 1;
626                         break;
627                 case IORESOURCE_DMA:
628                         dma = &option->u.dma;
629                         if (dma->map & (1 << start))
630                                 return 1;
631                         break;
632                 }
633         }
634
635         return 0;
636 }
637 EXPORT_SYMBOL(pnp_possible_config);
638
639 int pnp_range_reserved(resource_size_t start, resource_size_t end)
640 {
641         struct pnp_dev *dev;
642         struct pnp_resource *pnp_res;
643         resource_size_t *dev_start, *dev_end;
644
645         pnp_for_each_dev(dev) {
646                 list_for_each_entry(pnp_res, &dev->resources, list) {
647                         dev_start = &pnp_res->res.start;
648                         dev_end   = &pnp_res->res.end;
649                         if (ranged_conflict(&start, &end, dev_start, dev_end))
650                                 return 1;
651                 }
652         }
653         return 0;
654 }
655 EXPORT_SYMBOL(pnp_range_reserved);
656
657 /* format is: pnp_reserve_irq=irq1[,irq2] .... */
658 static int __init pnp_setup_reserve_irq(char *str)
659 {
660         int i;
661
662         for (i = 0; i < 16; i++)
663                 if (get_option(&str, &pnp_reserve_irq[i]) != 2)
664                         break;
665         return 1;
666 }
667
668 __setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
669
670 /* format is: pnp_reserve_dma=dma1[,dma2] .... */
671 static int __init pnp_setup_reserve_dma(char *str)
672 {
673         int i;
674
675         for (i = 0; i < 8; i++)
676                 if (get_option(&str, &pnp_reserve_dma[i]) != 2)
677                         break;
678         return 1;
679 }
680
681 __setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
682
683 /* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
684 static int __init pnp_setup_reserve_io(char *str)
685 {
686         int i;
687
688         for (i = 0; i < 16; i++)
689                 if (get_option(&str, &pnp_reserve_io[i]) != 2)
690                         break;
691         return 1;
692 }
693
694 __setup("pnp_reserve_io=", pnp_setup_reserve_io);
695
696 /* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
697 static int __init pnp_setup_reserve_mem(char *str)
698 {
699         int i;
700
701         for (i = 0; i < 16; i++)
702                 if (get_option(&str, &pnp_reserve_mem[i]) != 2)
703                         break;
704         return 1;
705 }
706
707 __setup("pnp_reserve_mem=", pnp_setup_reserve_mem);