1 // SPDX-License-Identifier: GPL-2.0-only
3 * drivers/acpi/resource.c - ACPI device resources interpretation.
5 * Copyright (C) 2012, Intel Corp.
6 * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
13 #include <linux/acpi.h>
14 #include <linux/device.h>
15 #include <linux/export.h>
16 #include <linux/ioport.h>
17 #include <linux/slab.h>
18 #include <linux/irq.h>
19 #include <linux/dmi.h>
22 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
23 static inline bool acpi_iospace_resource_valid(struct resource *res)
25 /* On X86 IO space is limited to the [0 - 64K] IO port range */
26 return res->end < 0x10003;
29 #define valid_IRQ(i) (true)
31 * ACPI IO descriptors on arches other than X86 contain MMIO CPU physical
32 * addresses mapping IO space in CPU physical address space, IO space
33 * resources can be placed anywhere in the 64-bit physical address space.
36 acpi_iospace_resource_valid(struct resource *res) { return true; }
39 #if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI)
40 static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq)
42 return ext_irq->resource_source.string_length == 0 &&
43 ext_irq->producer_consumer == ACPI_CONSUMER;
46 static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq)
52 static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
54 u64 reslen = end - start + 1;
57 * CHECKME: len might be required to check versus a minimum
58 * length as well. 1 for io is fine, but for memory it does
59 * not make any sense at all.
60 * Note: some BIOSes report incorrect length for ACPI address space
61 * descriptor, so remove check of 'reslen == len' to avoid regression.
63 if (len && reslen && start <= end)
66 pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
67 io ? "io" : "mem", start, end, len);
72 static void acpi_dev_memresource_flags(struct resource *res, u64 len,
75 res->flags = IORESOURCE_MEM;
77 if (!acpi_dev_resource_len_valid(res->start, res->end, len, false))
78 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
80 if (write_protect == ACPI_READ_WRITE_MEMORY)
81 res->flags |= IORESOURCE_MEM_WRITEABLE;
84 static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
88 res->end = start + len - 1;
89 acpi_dev_memresource_flags(res, len, write_protect);
93 * acpi_dev_resource_memory - Extract ACPI memory resource information.
94 * @ares: Input ACPI resource object.
95 * @res: Output generic resource object.
97 * Check if the given ACPI resource object represents a memory resource and
98 * if that's the case, use the information in it to populate the generic
99 * resource object pointed to by @res.
102 * 1) false with res->flags setting to zero: not the expected resource type
103 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
104 * 3) true: valid assigned resource
106 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
108 struct acpi_resource_memory24 *memory24;
109 struct acpi_resource_memory32 *memory32;
110 struct acpi_resource_fixed_memory32 *fixed_memory32;
112 switch (ares->type) {
113 case ACPI_RESOURCE_TYPE_MEMORY24:
114 memory24 = &ares->data.memory24;
115 acpi_dev_get_memresource(res, memory24->minimum << 8,
116 memory24->address_length << 8,
117 memory24->write_protect);
119 case ACPI_RESOURCE_TYPE_MEMORY32:
120 memory32 = &ares->data.memory32;
121 acpi_dev_get_memresource(res, memory32->minimum,
122 memory32->address_length,
123 memory32->write_protect);
125 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
126 fixed_memory32 = &ares->data.fixed_memory32;
127 acpi_dev_get_memresource(res, fixed_memory32->address,
128 fixed_memory32->address_length,
129 fixed_memory32->write_protect);
136 return !(res->flags & IORESOURCE_DISABLED);
138 EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
140 static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
141 u8 io_decode, u8 translation_type)
143 res->flags = IORESOURCE_IO;
145 if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
146 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
148 if (!acpi_iospace_resource_valid(res))
149 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
151 if (io_decode == ACPI_DECODE_16)
152 res->flags |= IORESOURCE_IO_16BIT_ADDR;
153 if (translation_type == ACPI_SPARSE_TRANSLATION)
154 res->flags |= IORESOURCE_IO_SPARSE;
157 static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
161 res->end = start + len - 1;
162 acpi_dev_ioresource_flags(res, len, io_decode, 0);
166 * acpi_dev_resource_io - Extract ACPI I/O resource information.
167 * @ares: Input ACPI resource object.
168 * @res: Output generic resource object.
170 * Check if the given ACPI resource object represents an I/O resource and
171 * if that's the case, use the information in it to populate the generic
172 * resource object pointed to by @res.
175 * 1) false with res->flags setting to zero: not the expected resource type
176 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
177 * 3) true: valid assigned resource
179 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
181 struct acpi_resource_io *io;
182 struct acpi_resource_fixed_io *fixed_io;
184 switch (ares->type) {
185 case ACPI_RESOURCE_TYPE_IO:
187 acpi_dev_get_ioresource(res, io->minimum,
191 case ACPI_RESOURCE_TYPE_FIXED_IO:
192 fixed_io = &ares->data.fixed_io;
193 acpi_dev_get_ioresource(res, fixed_io->address,
194 fixed_io->address_length,
202 return !(res->flags & IORESOURCE_DISABLED);
204 EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
206 static bool acpi_decode_space(struct resource_win *win,
207 struct acpi_resource_address *addr,
208 struct acpi_address64_attribute *attr)
210 u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
211 bool wp = addr->info.mem.write_protect;
212 u64 len = attr->address_length;
213 u64 start, end, offset = 0;
214 struct resource *res = &win->res;
217 * Filter out invalid descriptor according to ACPI Spec 5.0, section
218 * 6.4.3.5 Address Space Resource Descriptors.
220 if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
221 (addr->min_address_fixed && addr->max_address_fixed && !len))
222 pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
223 addr->min_address_fixed, addr->max_address_fixed, len);
226 * For bridges that translate addresses across the bridge,
227 * translation_offset is the offset that must be added to the
228 * address on the secondary side to obtain the address on the
229 * primary side. Non-bridge devices must list 0 for all Address
230 * Translation offset bits.
232 if (addr->producer_consumer == ACPI_PRODUCER)
233 offset = attr->translation_offset;
234 else if (attr->translation_offset)
235 pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
236 attr->translation_offset);
237 start = attr->minimum + offset;
238 end = attr->maximum + offset;
240 win->offset = offset;
243 if (sizeof(resource_size_t) < sizeof(u64) &&
244 (offset != win->offset || start != res->start || end != res->end)) {
245 pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n",
246 attr->minimum, attr->maximum);
250 switch (addr->resource_type) {
251 case ACPI_MEMORY_RANGE:
252 acpi_dev_memresource_flags(res, len, wp);
255 acpi_dev_ioresource_flags(res, len, iodec,
256 addr->info.io.translation_type);
258 case ACPI_BUS_NUMBER_RANGE:
259 res->flags = IORESOURCE_BUS;
265 if (addr->producer_consumer == ACPI_PRODUCER)
266 res->flags |= IORESOURCE_WINDOW;
268 if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
269 res->flags |= IORESOURCE_PREFETCH;
271 return !(res->flags & IORESOURCE_DISABLED);
275 * acpi_dev_resource_address_space - Extract ACPI address space information.
276 * @ares: Input ACPI resource object.
277 * @win: Output generic resource object.
279 * Check if the given ACPI resource object represents an address space resource
280 * and if that's the case, use the information in it to populate the generic
281 * resource object pointed to by @win.
284 * 1) false with win->res.flags setting to zero: not the expected resource type
285 * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
287 * 3) true: valid assigned resource
289 bool acpi_dev_resource_address_space(struct acpi_resource *ares,
290 struct resource_win *win)
292 struct acpi_resource_address64 addr;
295 if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
298 return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
301 EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
304 * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
305 * @ares: Input ACPI resource object.
306 * @win: Output generic resource object.
308 * Check if the given ACPI resource object represents an extended address space
309 * resource and if that's the case, use the information in it to populate the
310 * generic resource object pointed to by @win.
313 * 1) false with win->res.flags setting to zero: not the expected resource type
314 * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
316 * 3) true: valid assigned resource
318 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
319 struct resource_win *win)
321 struct acpi_resource_extended_address64 *ext_addr;
324 if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
327 ext_addr = &ares->data.ext_address64;
329 return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
332 EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
335 * acpi_dev_irq_flags - Determine IRQ resource flags.
336 * @triggering: Triggering type as provided by ACPI.
337 * @polarity: Interrupt polarity as provided by ACPI.
338 * @shareable: Whether or not the interrupt is shareable.
339 * @wake_capable: Wake capability as provided by ACPI.
341 unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable, u8 wake_capable)
345 if (triggering == ACPI_LEVEL_SENSITIVE)
346 flags = polarity == ACPI_ACTIVE_LOW ?
347 IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL;
349 flags = polarity == ACPI_ACTIVE_LOW ?
350 IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE;
352 if (shareable == ACPI_SHARED)
353 flags |= IORESOURCE_IRQ_SHAREABLE;
355 if (wake_capable == ACPI_WAKE_CAPABLE)
356 flags |= IORESOURCE_IRQ_WAKECAPABLE;
358 return flags | IORESOURCE_IRQ;
360 EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
363 * acpi_dev_get_irq_type - Determine irq type.
364 * @triggering: Triggering type as provided by ACPI.
365 * @polarity: Interrupt polarity as provided by ACPI.
367 unsigned int acpi_dev_get_irq_type(int triggering, int polarity)
370 case ACPI_ACTIVE_LOW:
371 return triggering == ACPI_EDGE_SENSITIVE ?
372 IRQ_TYPE_EDGE_FALLING :
374 case ACPI_ACTIVE_HIGH:
375 return triggering == ACPI_EDGE_SENSITIVE ?
376 IRQ_TYPE_EDGE_RISING :
378 case ACPI_ACTIVE_BOTH:
379 if (triggering == ACPI_EDGE_SENSITIVE)
380 return IRQ_TYPE_EDGE_BOTH;
383 return IRQ_TYPE_NONE;
386 EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type);
388 static const struct dmi_system_id medion_laptop[] = {
390 .ident = "MEDION P15651",
392 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
393 DMI_MATCH(DMI_BOARD_NAME, "M15T"),
397 .ident = "MEDION S17405",
399 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
400 DMI_MATCH(DMI_BOARD_NAME, "M17T"),
404 .ident = "MEDION S17413",
406 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
407 DMI_MATCH(DMI_BOARD_NAME, "M1xA"),
413 static const struct dmi_system_id asus_laptop[] = {
415 .ident = "Asus Vivobook K3402ZA",
417 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
418 DMI_MATCH(DMI_BOARD_NAME, "K3402ZA"),
422 .ident = "Asus Vivobook K3502ZA",
424 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
425 DMI_MATCH(DMI_BOARD_NAME, "K3502ZA"),
429 .ident = "Asus Vivobook S5402ZA",
431 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
432 DMI_MATCH(DMI_BOARD_NAME, "S5402ZA"),
436 .ident = "Asus Vivobook S5602ZA",
438 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
439 DMI_MATCH(DMI_BOARD_NAME, "S5602ZA"),
443 .ident = "Asus ExpertBook B1502CBA",
445 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
446 DMI_MATCH(DMI_BOARD_NAME, "B1502CBA"),
450 .ident = "Asus ExpertBook B2402CBA",
452 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
453 DMI_MATCH(DMI_BOARD_NAME, "B2402CBA"),
457 .ident = "Asus ExpertBook B2402FBA",
459 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
460 DMI_MATCH(DMI_BOARD_NAME, "B2402FBA"),
464 .ident = "Asus ExpertBook B2502",
466 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
467 DMI_MATCH(DMI_BOARD_NAME, "B2502CBA"),
473 static const struct dmi_system_id tongfang_gm_rg[] = {
475 .ident = "TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD",
477 DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
483 static const struct dmi_system_id maingear_laptop[] = {
485 .ident = "MAINGEAR Vector Pro 2 15",
487 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
488 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"),
492 .ident = "MAINGEAR Vector Pro 2 17",
494 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
495 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"),
501 static const struct dmi_system_id pcspecialist_laptop[] = {
503 .ident = "PCSpecialist Elimina Pro 16 M",
505 DMI_MATCH(DMI_SYS_VENDOR, "PCSpecialist"),
506 DMI_MATCH(DMI_PRODUCT_NAME, "Elimina Pro 16 M"),
512 static const struct dmi_system_id lg_laptop[] = {
514 .ident = "LG Electronics 17U70P",
516 DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
517 DMI_MATCH(DMI_BOARD_NAME, "17U70P"),
523 struct irq_override_cmp {
524 const struct dmi_system_id *system;
526 unsigned char triggering;
527 unsigned char polarity;
528 unsigned char shareable;
532 static const struct irq_override_cmp override_table[] = {
533 { medion_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
534 { asus_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
535 { tongfang_gm_rg, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
536 { maingear_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
537 { pcspecialist_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
538 { lg_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
541 static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
546 for (i = 0; i < ARRAY_SIZE(override_table); i++) {
547 const struct irq_override_cmp *entry = &override_table[i];
549 if (dmi_check_system(entry->system) &&
551 entry->triggering == triggering &&
552 entry->polarity == polarity &&
553 entry->shareable == shareable)
554 return entry->override;
559 * Always use the MADT override info, except for the i8042 PS/2 ctrl
560 * IRQs (1 and 12). For these the DSDT IRQ settings should sometimes
561 * be used otherwise PS/2 keyboards / mice will not work.
563 if (gsi != 1 && gsi != 12)
566 /* If the override comes from an INT_SRC_OVR MADT entry, honor it. */
567 if (acpi_int_src_ovr[gsi])
571 * IRQ override isn't needed on modern AMD Zen systems and
572 * this override breaks active low IRQs on AMD Ryzen 6000 and
573 * newer systems. Skip it.
575 if (boot_cpu_has(X86_FEATURE_ZEN))
582 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
583 u8 triggering, u8 polarity, u8 shareable,
584 u8 wake_capable, bool check_override)
588 if (!valid_IRQ(gsi)) {
589 irqresource_disabled(res, gsi);
594 * In IO-APIC mode, use overridden attribute. Two reasons:
595 * 1. BIOS bug in DSDT
596 * 2. BIOS uses IO-APIC mode Interrupt Source Override
598 * We do this only if we are dealing with IRQ() or IRQNoFlags()
599 * resource (the legacy ISA resources). With modern ACPI 5 devices
600 * using extended IRQ descriptors we take the IRQ configuration
601 * from _CRS directly.
603 if (check_override &&
604 acpi_dev_irq_override(gsi, triggering, polarity, shareable) &&
605 !acpi_get_override_irq(gsi, &t, &p)) {
606 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
607 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
609 if (triggering != trig || polarity != pol) {
610 pr_warn("ACPI: IRQ %d override to %s%s, %s%s\n", gsi,
611 t ? "level" : "edge",
612 trig == triggering ? "" : "(!)",
614 pol == polarity ? "" : "(!)");
620 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
621 irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
626 irqresource_disabled(res, gsi);
631 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
632 * @ares: Input ACPI resource object.
633 * @index: Index into the array of GSIs represented by the resource.
634 * @res: Output generic resource object.
636 * Check if the given ACPI resource object represents an interrupt resource
637 * and @index does not exceed the resource's interrupt count (true is returned
638 * in that case regardless of the results of the other checks)). If that's the
639 * case, register the GSI corresponding to @index from the array of interrupts
640 * represented by the resource and populate the generic resource object pointed
641 * to by @res accordingly. If the registration of the GSI is not successful,
642 * IORESOURCE_DISABLED will be set it that object's flags.
645 * 1) false with res->flags setting to zero: not the expected resource type
646 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
647 * 3) true: valid assigned resource
649 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
650 struct resource *res)
652 struct acpi_resource_irq *irq;
653 struct acpi_resource_extended_irq *ext_irq;
655 switch (ares->type) {
656 case ACPI_RESOURCE_TYPE_IRQ:
658 * Per spec, only one interrupt per descriptor is allowed in
659 * _CRS, but some firmware violates this, so parse them all.
661 irq = &ares->data.irq;
662 if (index >= irq->interrupt_count) {
663 irqresource_disabled(res, 0);
666 acpi_dev_get_irqresource(res, irq->interrupts[index],
667 irq->triggering, irq->polarity,
668 irq->shareable, irq->wake_capable,
671 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
672 ext_irq = &ares->data.extended_irq;
673 if (index >= ext_irq->interrupt_count) {
674 irqresource_disabled(res, 0);
678 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
679 ext_irq->triggering, ext_irq->polarity,
680 ext_irq->shareable, ext_irq->wake_capable,
683 irqresource_disabled(res, 0);
692 EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
695 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
696 * @list: The head of the resource list to free.
698 void acpi_dev_free_resource_list(struct list_head *list)
700 resource_list_free(list);
702 EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
704 struct res_proc_context {
705 struct list_head *list;
706 int (*preproc)(struct acpi_resource *, void *);
712 static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
713 struct res_proc_context *c)
715 struct resource_entry *rentry;
717 rentry = resource_list_create_entry(NULL, 0);
722 *rentry->res = win->res;
723 rentry->offset = win->offset;
724 resource_list_add_tail(rentry, c->list);
729 static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
732 struct res_proc_context *c = context;
733 struct resource_win win;
734 struct resource *res = &win.res;
740 ret = c->preproc(ares, c->preproc_data);
743 return AE_ABORT_METHOD;
744 } else if (ret > 0) {
749 memset(&win, 0, sizeof(win));
751 if (acpi_dev_resource_memory(ares, res)
752 || acpi_dev_resource_io(ares, res)
753 || acpi_dev_resource_address_space(ares, &win)
754 || acpi_dev_resource_ext_address_space(ares, &win))
755 return acpi_dev_new_resource_entry(&win, c);
757 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
760 status = acpi_dev_new_resource_entry(&win, c);
761 if (ACPI_FAILURE(status))
768 static int __acpi_dev_get_resources(struct acpi_device *adev,
769 struct list_head *list,
770 int (*preproc)(struct acpi_resource *, void *),
771 void *preproc_data, char *method)
773 struct res_proc_context c;
776 if (!adev || !adev->handle || !list_empty(list))
779 if (!acpi_has_method(adev->handle, method))
784 c.preproc_data = preproc_data;
787 status = acpi_walk_resources(adev->handle, method,
788 acpi_dev_process_resource, &c);
789 if (ACPI_FAILURE(status)) {
790 acpi_dev_free_resource_list(list);
791 return c.error ? c.error : -EIO;
798 * acpi_dev_get_resources - Get current resources of a device.
799 * @adev: ACPI device node to get the resources for.
800 * @list: Head of the resultant list of resources (must be empty).
801 * @preproc: The caller's preprocessing routine.
802 * @preproc_data: Pointer passed to the caller's preprocessing routine.
804 * Evaluate the _CRS method for the given device node and process its output by
805 * (1) executing the @preproc() routine provided by the caller, passing the
806 * resource pointer and @preproc_data to it as arguments, for each ACPI resource
807 * returned and (2) converting all of the returned ACPI resources into struct
808 * resource objects if possible. If the return value of @preproc() in step (1)
809 * is different from 0, step (2) is not applied to the given ACPI resource and
810 * if that value is negative, the whole processing is aborted and that value is
811 * returned as the final error code.
813 * The resultant struct resource objects are put on the list pointed to by
814 * @list, that must be empty initially, as members of struct resource_entry
815 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to
818 * The number of resources in the output list is returned on success, an error
819 * code reflecting the error condition is returned otherwise.
821 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
822 int (*preproc)(struct acpi_resource *, void *),
825 return __acpi_dev_get_resources(adev, list, preproc, preproc_data,
828 EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
830 static int is_memory(struct acpi_resource *ares, void *not_used)
832 struct resource_win win;
833 struct resource *res = &win.res;
835 memset(&win, 0, sizeof(win));
837 if (acpi_dev_filter_resource_type(ares, IORESOURCE_MEM))
840 return !(acpi_dev_resource_memory(ares, res)
841 || acpi_dev_resource_address_space(ares, &win)
842 || acpi_dev_resource_ext_address_space(ares, &win));
846 * acpi_dev_get_dma_resources - Get current DMA resources of a device.
847 * @adev: ACPI device node to get the resources for.
848 * @list: Head of the resultant list of resources (must be empty).
850 * Evaluate the _DMA method for the given device node and process its
853 * The resultant struct resource objects are put on the list pointed to
854 * by @list, that must be empty initially, as members of struct
855 * resource_entry objects. Callers of this routine should use
856 * %acpi_dev_free_resource_list() to free that list.
858 * The number of resources in the output list is returned on success,
859 * an error code reflecting the error condition is returned otherwise.
861 int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
863 return __acpi_dev_get_resources(adev, list, is_memory, NULL,
866 EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
869 * acpi_dev_get_memory_resources - Get current memory resources of a device.
870 * @adev: ACPI device node to get the resources for.
871 * @list: Head of the resultant list of resources (must be empty).
873 * This is a helper function that locates all memory type resources of @adev
874 * with acpi_dev_get_resources().
876 * The number of resources in the output list is returned on success, an error
877 * code reflecting the error condition is returned otherwise.
879 int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list)
881 return acpi_dev_get_resources(adev, list, is_memory, NULL);
883 EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources);
886 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
888 * @ares: Input ACPI resource object.
889 * @types: Valid resource types of IORESOURCE_XXX
891 * This is a helper function to support acpi_dev_get_resources(), which filters
892 * ACPI resource objects according to resource types.
894 int acpi_dev_filter_resource_type(struct acpi_resource *ares,
897 unsigned long type = 0;
899 switch (ares->type) {
900 case ACPI_RESOURCE_TYPE_MEMORY24:
901 case ACPI_RESOURCE_TYPE_MEMORY32:
902 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
903 type = IORESOURCE_MEM;
905 case ACPI_RESOURCE_TYPE_IO:
906 case ACPI_RESOURCE_TYPE_FIXED_IO:
907 type = IORESOURCE_IO;
909 case ACPI_RESOURCE_TYPE_IRQ:
910 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
911 type = IORESOURCE_IRQ;
913 case ACPI_RESOURCE_TYPE_DMA:
914 case ACPI_RESOURCE_TYPE_FIXED_DMA:
915 type = IORESOURCE_DMA;
917 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
918 type = IORESOURCE_REG;
920 case ACPI_RESOURCE_TYPE_ADDRESS16:
921 case ACPI_RESOURCE_TYPE_ADDRESS32:
922 case ACPI_RESOURCE_TYPE_ADDRESS64:
923 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
924 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
925 type = IORESOURCE_MEM;
926 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
927 type = IORESOURCE_IO;
928 else if (ares->data.address.resource_type ==
929 ACPI_BUS_NUMBER_RANGE)
930 type = IORESOURCE_BUS;
936 return (type & types) ? 0 : 1;
938 EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);
940 static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res)
942 struct list_head resource_list;
943 struct resource_entry *rentry;
946 INIT_LIST_HEAD(&resource_list);
947 ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
951 list_for_each_entry(rentry, &resource_list, node) {
952 if (resource_contains(rentry->res, res)) {
959 acpi_dev_free_resource_list(&resource_list);
963 static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth,
964 void *context, void **ret)
966 struct resource *res = context;
967 struct acpi_device **consumer = (struct acpi_device **) ret;
968 struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
973 if (acpi_dev_consumes_res(adev, res)) {
975 return AE_CTRL_TERMINATE;
982 * acpi_resource_consumer - Find the ACPI device that consumes @res.
983 * @res: Resource to search for.
985 * Search the current resource settings (_CRS) of every ACPI device node
986 * for @res. If we find an ACPI device whose _CRS includes @res, return
987 * it. Otherwise, return NULL.
989 struct acpi_device *acpi_resource_consumer(struct resource *res)
991 struct acpi_device *consumer = NULL;
993 acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer);