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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * drivers/acpi/resource.c - ACPI device resources interpretation.
- *
- * Copyright (C) 2012, Intel Corp.
- * Author: Rafael J. Wysocki <[email protected]>
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- */
- #include <linux/acpi.h>
- #include <linux/device.h>
- #include <linux/export.h>
- #include <linux/ioport.h>
- #include <linux/slab.h>
- #include <linux/irq.h>
- #include <linux/dmi.h>
- #ifdef CONFIG_X86
- #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
- static inline bool acpi_iospace_resource_valid(struct resource *res)
- {
- /* On X86 IO space is limited to the [0 - 64K] IO port range */
- return res->end < 0x10003;
- }
- #else
- #define valid_IRQ(i) (true)
- /*
- * ACPI IO descriptors on arches other than X86 contain MMIO CPU physical
- * addresses mapping IO space in CPU physical address space, IO space
- * resources can be placed anywhere in the 64-bit physical address space.
- */
- static inline bool
- acpi_iospace_resource_valid(struct resource *res) { return true; }
- #endif
- #if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI)
- static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq)
- {
- return ext_irq->resource_source.string_length == 0 &&
- ext_irq->producer_consumer == ACPI_CONSUMER;
- }
- #else
- static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq)
- {
- return true;
- }
- #endif
- static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
- {
- u64 reslen = end - start + 1;
- /*
- * CHECKME: len might be required to check versus a minimum
- * length as well. 1 for io is fine, but for memory it does
- * not make any sense at all.
- * Note: some BIOSes report incorrect length for ACPI address space
- * descriptor, so remove check of 'reslen == len' to avoid regression.
- */
- if (len && reslen && start <= end)
- return true;
- pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
- io ? "io" : "mem", start, end, len);
- return false;
- }
- static void acpi_dev_memresource_flags(struct resource *res, u64 len,
- u8 write_protect)
- {
- res->flags = IORESOURCE_MEM;
- if (!acpi_dev_resource_len_valid(res->start, res->end, len, false))
- res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
- if (write_protect == ACPI_READ_WRITE_MEMORY)
- res->flags |= IORESOURCE_MEM_WRITEABLE;
- }
- static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
- u8 write_protect)
- {
- res->start = start;
- res->end = start + len - 1;
- acpi_dev_memresource_flags(res, len, write_protect);
- }
- /**
- * acpi_dev_resource_memory - Extract ACPI memory resource information.
- * @ares: Input ACPI resource object.
- * @res: Output generic resource object.
- *
- * Check if the given ACPI resource object represents a memory resource and
- * if that's the case, use the information in it to populate the generic
- * resource object pointed to by @res.
- *
- * Return:
- * 1) false with res->flags setting to zero: not the expected resource type
- * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
- * 3) true: valid assigned resource
- */
- bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
- {
- struct acpi_resource_memory24 *memory24;
- struct acpi_resource_memory32 *memory32;
- struct acpi_resource_fixed_memory32 *fixed_memory32;
- switch (ares->type) {
- case ACPI_RESOURCE_TYPE_MEMORY24:
- memory24 = &ares->data.memory24;
- acpi_dev_get_memresource(res, memory24->minimum << 8,
- memory24->address_length << 8,
- memory24->write_protect);
- break;
- case ACPI_RESOURCE_TYPE_MEMORY32:
- memory32 = &ares->data.memory32;
- acpi_dev_get_memresource(res, memory32->minimum,
- memory32->address_length,
- memory32->write_protect);
- break;
- case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
- fixed_memory32 = &ares->data.fixed_memory32;
- acpi_dev_get_memresource(res, fixed_memory32->address,
- fixed_memory32->address_length,
- fixed_memory32->write_protect);
- break;
- default:
- res->flags = 0;
- return false;
- }
- return !(res->flags & IORESOURCE_DISABLED);
- }
- EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
- static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
- u8 io_decode, u8 translation_type)
- {
- res->flags = IORESOURCE_IO;
- if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
- res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
- if (!acpi_iospace_resource_valid(res))
- res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
- if (io_decode == ACPI_DECODE_16)
- res->flags |= IORESOURCE_IO_16BIT_ADDR;
- if (translation_type == ACPI_SPARSE_TRANSLATION)
- res->flags |= IORESOURCE_IO_SPARSE;
- }
- static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
- u8 io_decode)
- {
- res->start = start;
- res->end = start + len - 1;
- acpi_dev_ioresource_flags(res, len, io_decode, 0);
- }
- /**
- * acpi_dev_resource_io - Extract ACPI I/O resource information.
- * @ares: Input ACPI resource object.
- * @res: Output generic resource object.
- *
- * Check if the given ACPI resource object represents an I/O resource and
- * if that's the case, use the information in it to populate the generic
- * resource object pointed to by @res.
- *
- * Return:
- * 1) false with res->flags setting to zero: not the expected resource type
- * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
- * 3) true: valid assigned resource
- */
- bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
- {
- struct acpi_resource_io *io;
- struct acpi_resource_fixed_io *fixed_io;
- switch (ares->type) {
- case ACPI_RESOURCE_TYPE_IO:
- io = &ares->data.io;
- acpi_dev_get_ioresource(res, io->minimum,
- io->address_length,
- io->io_decode);
- break;
- case ACPI_RESOURCE_TYPE_FIXED_IO:
- fixed_io = &ares->data.fixed_io;
- acpi_dev_get_ioresource(res, fixed_io->address,
- fixed_io->address_length,
- ACPI_DECODE_10);
- break;
- default:
- res->flags = 0;
- return false;
- }
- return !(res->flags & IORESOURCE_DISABLED);
- }
- EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
- static bool acpi_decode_space(struct resource_win *win,
- struct acpi_resource_address *addr,
- struct acpi_address64_attribute *attr)
- {
- u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
- bool wp = addr->info.mem.write_protect;
- u64 len = attr->address_length;
- u64 start, end, offset = 0;
- struct resource *res = &win->res;
- /*
- * Filter out invalid descriptor according to ACPI Spec 5.0, section
- * 6.4.3.5 Address Space Resource Descriptors.
- */
- if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
- (addr->min_address_fixed && addr->max_address_fixed && !len))
- pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
- addr->min_address_fixed, addr->max_address_fixed, len);
- /*
- * For bridges that translate addresses across the bridge,
- * translation_offset is the offset that must be added to the
- * address on the secondary side to obtain the address on the
- * primary side. Non-bridge devices must list 0 for all Address
- * Translation offset bits.
- */
- if (addr->producer_consumer == ACPI_PRODUCER)
- offset = attr->translation_offset;
- else if (attr->translation_offset)
- pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
- attr->translation_offset);
- start = attr->minimum + offset;
- end = attr->maximum + offset;
- win->offset = offset;
- res->start = start;
- res->end = end;
- if (sizeof(resource_size_t) < sizeof(u64) &&
- (offset != win->offset || start != res->start || end != res->end)) {
- pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n",
- attr->minimum, attr->maximum);
- return false;
- }
- switch (addr->resource_type) {
- case ACPI_MEMORY_RANGE:
- acpi_dev_memresource_flags(res, len, wp);
- break;
- case ACPI_IO_RANGE:
- acpi_dev_ioresource_flags(res, len, iodec,
- addr->info.io.translation_type);
- break;
- case ACPI_BUS_NUMBER_RANGE:
- res->flags = IORESOURCE_BUS;
- break;
- default:
- return false;
- }
- if (addr->producer_consumer == ACPI_PRODUCER)
- res->flags |= IORESOURCE_WINDOW;
- if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
- res->flags |= IORESOURCE_PREFETCH;
- return !(res->flags & IORESOURCE_DISABLED);
- }
- /**
- * acpi_dev_resource_address_space - Extract ACPI address space information.
- * @ares: Input ACPI resource object.
- * @win: Output generic resource object.
- *
- * Check if the given ACPI resource object represents an address space resource
- * and if that's the case, use the information in it to populate the generic
- * resource object pointed to by @win.
- *
- * Return:
- * 1) false with win->res.flags setting to zero: not the expected resource type
- * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
- * resource
- * 3) true: valid assigned resource
- */
- bool acpi_dev_resource_address_space(struct acpi_resource *ares,
- struct resource_win *win)
- {
- struct acpi_resource_address64 addr;
- win->res.flags = 0;
- if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
- return false;
- return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
- &addr.address);
- }
- EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
- /**
- * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
- * @ares: Input ACPI resource object.
- * @win: Output generic resource object.
- *
- * Check if the given ACPI resource object represents an extended address space
- * resource and if that's the case, use the information in it to populate the
- * generic resource object pointed to by @win.
- *
- * Return:
- * 1) false with win->res.flags setting to zero: not the expected resource type
- * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
- * resource
- * 3) true: valid assigned resource
- */
- bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
- struct resource_win *win)
- {
- struct acpi_resource_extended_address64 *ext_addr;
- win->res.flags = 0;
- if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
- return false;
- ext_addr = &ares->data.ext_address64;
- return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
- &ext_addr->address);
- }
- EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
- /**
- * acpi_dev_irq_flags - Determine IRQ resource flags.
- * @triggering: Triggering type as provided by ACPI.
- * @polarity: Interrupt polarity as provided by ACPI.
- * @shareable: Whether or not the interrupt is shareable.
- * @wake_capable: Wake capability as provided by ACPI.
- */
- unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable, u8 wake_capable)
- {
- unsigned long flags;
- if (triggering == ACPI_LEVEL_SENSITIVE)
- flags = polarity == ACPI_ACTIVE_LOW ?
- IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL;
- else
- flags = polarity == ACPI_ACTIVE_LOW ?
- IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE;
- if (shareable == ACPI_SHARED)
- flags |= IORESOURCE_IRQ_SHAREABLE;
- if (wake_capable == ACPI_WAKE_CAPABLE)
- flags |= IORESOURCE_IRQ_WAKECAPABLE;
- return flags | IORESOURCE_IRQ;
- }
- EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
- /**
- * acpi_dev_get_irq_type - Determine irq type.
- * @triggering: Triggering type as provided by ACPI.
- * @polarity: Interrupt polarity as provided by ACPI.
- */
- unsigned int acpi_dev_get_irq_type(int triggering, int polarity)
- {
- switch (polarity) {
- case ACPI_ACTIVE_LOW:
- return triggering == ACPI_EDGE_SENSITIVE ?
- IRQ_TYPE_EDGE_FALLING :
- IRQ_TYPE_LEVEL_LOW;
- case ACPI_ACTIVE_HIGH:
- return triggering == ACPI_EDGE_SENSITIVE ?
- IRQ_TYPE_EDGE_RISING :
- IRQ_TYPE_LEVEL_HIGH;
- case ACPI_ACTIVE_BOTH:
- if (triggering == ACPI_EDGE_SENSITIVE)
- return IRQ_TYPE_EDGE_BOTH;
- fallthrough;
- default:
- return IRQ_TYPE_NONE;
- }
- }
- EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type);
- static const struct dmi_system_id medion_laptop[] = {
- {
- .ident = "MEDION P15651",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
- DMI_MATCH(DMI_BOARD_NAME, "M15T"),
- },
- },
- {
- .ident = "MEDION S17405",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
- DMI_MATCH(DMI_BOARD_NAME, "M17T"),
- },
- },
- {
- .ident = "MEDION S17413",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
- DMI_MATCH(DMI_BOARD_NAME, "M1xA"),
- },
- },
- { }
- };
- static const struct dmi_system_id asus_laptop[] = {
- {
- .ident = "Asus Vivobook K3402ZA",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
- DMI_MATCH(DMI_BOARD_NAME, "K3402ZA"),
- },
- },
- {
- .ident = "Asus Vivobook K3502ZA",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
- DMI_MATCH(DMI_BOARD_NAME, "K3502ZA"),
- },
- },
- {
- .ident = "Asus Vivobook S5402ZA",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
- DMI_MATCH(DMI_BOARD_NAME, "S5402ZA"),
- },
- },
- {
- .ident = "Asus Vivobook S5602ZA",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
- DMI_MATCH(DMI_BOARD_NAME, "S5602ZA"),
- },
- },
- {
- .ident = "Asus ExpertBook B1402CBA",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
- DMI_MATCH(DMI_BOARD_NAME, "B1402CBA"),
- },
- },
- {
- /* Asus ExpertBook B1402CVA */
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
- DMI_MATCH(DMI_BOARD_NAME, "B1402CVA"),
- },
- },
- {
- .ident = "Asus ExpertBook B2402CBA",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
- DMI_MATCH(DMI_BOARD_NAME, "B2402CBA"),
- },
- },
- {
- .ident = "Asus ExpertBook B2502",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
- DMI_MATCH(DMI_BOARD_NAME, "B2502CBA"),
- },
- },
- { }
- };
- static const struct dmi_system_id lenovo_laptop[] = {
- {
- .ident = "LENOVO IdeaPad Flex 5 14ALC7",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_NAME, "82R9"),
- },
- },
- {
- .ident = "LENOVO IdeaPad Flex 5 16ALC7",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
- DMI_MATCH(DMI_PRODUCT_NAME, "82RA"),
- },
- },
- { }
- };
- static const struct dmi_system_id tongfang_gm_rg[] = {
- {
- .ident = "TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
- },
- },
- { }
- };
- static const struct dmi_system_id maingear_laptop[] = {
- {
- .ident = "MAINGEAR Vector Pro 2 15",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
- DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"),
- }
- },
- {
- /* TongFang GMxXGxx/TUXEDO Polaris 15 Gen5 AMD */
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "GMxXGxx"),
- },
- },
- {
- /* TongFang GM6XGxX/TUXEDO Stellaris 16 Gen5 AMD */
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "GM6XGxX"),
- },
- },
- {
- .ident = "MAINGEAR Vector Pro 2 17",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
- DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"),
- },
- },
- { }
- };
- static const struct dmi_system_id lg_laptop[] = {
- {
- .ident = "LG Electronics 17U70P",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
- DMI_MATCH(DMI_BOARD_NAME, "17U70P"),
- },
- },
- { }
- };
- struct irq_override_cmp {
- const struct dmi_system_id *system;
- unsigned char irq;
- unsigned char triggering;
- unsigned char polarity;
- unsigned char shareable;
- bool override;
- };
- static const struct irq_override_cmp override_table[] = {
- { medion_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
- { asus_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
- { lenovo_laptop, 6, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, true },
- { lenovo_laptop, 10, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, true },
- { tongfang_gm_rg, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
- { maingear_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
- { lg_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
- };
- static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
- u8 shareable)
- {
- int i;
- for (i = 0; i < ARRAY_SIZE(override_table); i++) {
- const struct irq_override_cmp *entry = &override_table[i];
- if (dmi_check_system(entry->system) &&
- entry->irq == gsi &&
- entry->triggering == triggering &&
- entry->polarity == polarity &&
- entry->shareable == shareable)
- return entry->override;
- }
- #ifdef CONFIG_X86
- /*
- * IRQ override isn't needed on modern AMD Zen systems and
- * this override breaks active low IRQs on AMD Ryzen 6000 and
- * newer systems. Skip it.
- */
- if (boot_cpu_has(X86_FEATURE_ZEN))
- return false;
- #endif
- return true;
- }
- static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
- u8 triggering, u8 polarity, u8 shareable,
- u8 wake_capable, bool check_override)
- {
- int irq, p, t;
- if (!valid_IRQ(gsi)) {
- irqresource_disabled(res, gsi);
- return;
- }
- /*
- * In IO-APIC mode, use overridden attribute. Two reasons:
- * 1. BIOS bug in DSDT
- * 2. BIOS uses IO-APIC mode Interrupt Source Override
- *
- * We do this only if we are dealing with IRQ() or IRQNoFlags()
- * resource (the legacy ISA resources). With modern ACPI 5 devices
- * using extended IRQ descriptors we take the IRQ configuration
- * from _CRS directly.
- */
- if (check_override &&
- acpi_dev_irq_override(gsi, triggering, polarity, shareable) &&
- !acpi_get_override_irq(gsi, &t, &p)) {
- u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
- u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
- if (triggering != trig || polarity != pol) {
- pr_warn("ACPI: IRQ %d override to %s%s, %s%s\n", gsi,
- t ? "level" : "edge",
- trig == triggering ? "" : "(!)",
- p ? "low" : "high",
- pol == polarity ? "" : "(!)");
- triggering = trig;
- polarity = pol;
- }
- }
- res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
- irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
- if (irq >= 0) {
- res->start = irq;
- res->end = irq;
- } else {
- irqresource_disabled(res, gsi);
- }
- }
- /**
- * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
- * @ares: Input ACPI resource object.
- * @index: Index into the array of GSIs represented by the resource.
- * @res: Output generic resource object.
- *
- * Check if the given ACPI resource object represents an interrupt resource
- * and @index does not exceed the resource's interrupt count (true is returned
- * in that case regardless of the results of the other checks)). If that's the
- * case, register the GSI corresponding to @index from the array of interrupts
- * represented by the resource and populate the generic resource object pointed
- * to by @res accordingly. If the registration of the GSI is not successful,
- * IORESOURCE_DISABLED will be set it that object's flags.
- *
- * Return:
- * 1) false with res->flags setting to zero: not the expected resource type
- * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
- * 3) true: valid assigned resource
- */
- bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
- struct resource *res)
- {
- struct acpi_resource_irq *irq;
- struct acpi_resource_extended_irq *ext_irq;
- switch (ares->type) {
- case ACPI_RESOURCE_TYPE_IRQ:
- /*
- * Per spec, only one interrupt per descriptor is allowed in
- * _CRS, but some firmware violates this, so parse them all.
- */
- irq = &ares->data.irq;
- if (index >= irq->interrupt_count) {
- irqresource_disabled(res, 0);
- return false;
- }
- acpi_dev_get_irqresource(res, irq->interrupts[index],
- irq->triggering, irq->polarity,
- irq->shareable, irq->wake_capable,
- true);
- break;
- case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
- ext_irq = &ares->data.extended_irq;
- if (index >= ext_irq->interrupt_count) {
- irqresource_disabled(res, 0);
- return false;
- }
- if (is_gsi(ext_irq))
- acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
- ext_irq->triggering, ext_irq->polarity,
- ext_irq->shareable, ext_irq->wake_capable,
- false);
- else
- irqresource_disabled(res, 0);
- break;
- default:
- res->flags = 0;
- return false;
- }
- return true;
- }
- EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
- /**
- * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
- * @list: The head of the resource list to free.
- */
- void acpi_dev_free_resource_list(struct list_head *list)
- {
- resource_list_free(list);
- }
- EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
- struct res_proc_context {
- struct list_head *list;
- int (*preproc)(struct acpi_resource *, void *);
- void *preproc_data;
- int count;
- int error;
- };
- static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
- struct res_proc_context *c)
- {
- struct resource_entry *rentry;
- rentry = resource_list_create_entry(NULL, 0);
- if (!rentry) {
- c->error = -ENOMEM;
- return AE_NO_MEMORY;
- }
- *rentry->res = win->res;
- rentry->offset = win->offset;
- resource_list_add_tail(rentry, c->list);
- c->count++;
- return AE_OK;
- }
- static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
- void *context)
- {
- struct res_proc_context *c = context;
- struct resource_win win;
- struct resource *res = &win.res;
- int i;
- if (c->preproc) {
- int ret;
- ret = c->preproc(ares, c->preproc_data);
- if (ret < 0) {
- c->error = ret;
- return AE_ABORT_METHOD;
- } else if (ret > 0) {
- return AE_OK;
- }
- }
- memset(&win, 0, sizeof(win));
- if (acpi_dev_resource_memory(ares, res)
- || acpi_dev_resource_io(ares, res)
- || acpi_dev_resource_address_space(ares, &win)
- || acpi_dev_resource_ext_address_space(ares, &win))
- return acpi_dev_new_resource_entry(&win, c);
- for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
- acpi_status status;
- status = acpi_dev_new_resource_entry(&win, c);
- if (ACPI_FAILURE(status))
- return status;
- }
- return AE_OK;
- }
- static int __acpi_dev_get_resources(struct acpi_device *adev,
- struct list_head *list,
- int (*preproc)(struct acpi_resource *, void *),
- void *preproc_data, char *method)
- {
- struct res_proc_context c;
- acpi_status status;
- if (!adev || !adev->handle || !list_empty(list))
- return -EINVAL;
- if (!acpi_has_method(adev->handle, method))
- return 0;
- c.list = list;
- c.preproc = preproc;
- c.preproc_data = preproc_data;
- c.count = 0;
- c.error = 0;
- status = acpi_walk_resources(adev->handle, method,
- acpi_dev_process_resource, &c);
- if (ACPI_FAILURE(status)) {
- acpi_dev_free_resource_list(list);
- return c.error ? c.error : -EIO;
- }
- return c.count;
- }
- /**
- * acpi_dev_get_resources - Get current resources of a device.
- * @adev: ACPI device node to get the resources for.
- * @list: Head of the resultant list of resources (must be empty).
- * @preproc: The caller's preprocessing routine.
- * @preproc_data: Pointer passed to the caller's preprocessing routine.
- *
- * Evaluate the _CRS method for the given device node and process its output by
- * (1) executing the @preproc() routine provided by the caller, passing the
- * resource pointer and @preproc_data to it as arguments, for each ACPI resource
- * returned and (2) converting all of the returned ACPI resources into struct
- * resource objects if possible. If the return value of @preproc() in step (1)
- * is different from 0, step (2) is not applied to the given ACPI resource and
- * if that value is negative, the whole processing is aborted and that value is
- * returned as the final error code.
- *
- * The resultant struct resource objects are put on the list pointed to by
- * @list, that must be empty initially, as members of struct resource_entry
- * objects. Callers of this routine should use %acpi_dev_free_resource_list() to
- * free that list.
- *
- * The number of resources in the output list is returned on success, an error
- * code reflecting the error condition is returned otherwise.
- */
- int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
- int (*preproc)(struct acpi_resource *, void *),
- void *preproc_data)
- {
- return __acpi_dev_get_resources(adev, list, preproc, preproc_data,
- METHOD_NAME__CRS);
- }
- EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
- static int is_memory(struct acpi_resource *ares, void *not_used)
- {
- struct resource_win win;
- struct resource *res = &win.res;
- memset(&win, 0, sizeof(win));
- if (acpi_dev_filter_resource_type(ares, IORESOURCE_MEM))
- return 1;
- return !(acpi_dev_resource_memory(ares, res)
- || acpi_dev_resource_address_space(ares, &win)
- || acpi_dev_resource_ext_address_space(ares, &win));
- }
- /**
- * acpi_dev_get_dma_resources - Get current DMA resources of a device.
- * @adev: ACPI device node to get the resources for.
- * @list: Head of the resultant list of resources (must be empty).
- *
- * Evaluate the _DMA method for the given device node and process its
- * output.
- *
- * The resultant struct resource objects are put on the list pointed to
- * by @list, that must be empty initially, as members of struct
- * resource_entry objects. Callers of this routine should use
- * %acpi_dev_free_resource_list() to free that list.
- *
- * The number of resources in the output list is returned on success,
- * an error code reflecting the error condition is returned otherwise.
- */
- int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
- {
- return __acpi_dev_get_resources(adev, list, is_memory, NULL,
- METHOD_NAME__DMA);
- }
- EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
- /**
- * acpi_dev_get_memory_resources - Get current memory resources of a device.
- * @adev: ACPI device node to get the resources for.
- * @list: Head of the resultant list of resources (must be empty).
- *
- * This is a helper function that locates all memory type resources of @adev
- * with acpi_dev_get_resources().
- *
- * The number of resources in the output list is returned on success, an error
- * code reflecting the error condition is returned otherwise.
- */
- int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list)
- {
- return acpi_dev_get_resources(adev, list, is_memory, NULL);
- }
- EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources);
- /**
- * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
- * types
- * @ares: Input ACPI resource object.
- * @types: Valid resource types of IORESOURCE_XXX
- *
- * This is a helper function to support acpi_dev_get_resources(), which filters
- * ACPI resource objects according to resource types.
- */
- int acpi_dev_filter_resource_type(struct acpi_resource *ares,
- unsigned long types)
- {
- unsigned long type = 0;
- switch (ares->type) {
- case ACPI_RESOURCE_TYPE_MEMORY24:
- case ACPI_RESOURCE_TYPE_MEMORY32:
- case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
- type = IORESOURCE_MEM;
- break;
- case ACPI_RESOURCE_TYPE_IO:
- case ACPI_RESOURCE_TYPE_FIXED_IO:
- type = IORESOURCE_IO;
- break;
- case ACPI_RESOURCE_TYPE_IRQ:
- case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
- type = IORESOURCE_IRQ;
- break;
- case ACPI_RESOURCE_TYPE_DMA:
- case ACPI_RESOURCE_TYPE_FIXED_DMA:
- type = IORESOURCE_DMA;
- break;
- case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
- type = IORESOURCE_REG;
- break;
- case ACPI_RESOURCE_TYPE_ADDRESS16:
- case ACPI_RESOURCE_TYPE_ADDRESS32:
- case ACPI_RESOURCE_TYPE_ADDRESS64:
- case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
- if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
- type = IORESOURCE_MEM;
- else if (ares->data.address.resource_type == ACPI_IO_RANGE)
- type = IORESOURCE_IO;
- else if (ares->data.address.resource_type ==
- ACPI_BUS_NUMBER_RANGE)
- type = IORESOURCE_BUS;
- break;
- default:
- break;
- }
- return (type & types) ? 0 : 1;
- }
- EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);
- static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res)
- {
- struct list_head resource_list;
- struct resource_entry *rentry;
- int ret, found = 0;
- INIT_LIST_HEAD(&resource_list);
- ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
- if (ret < 0)
- return 0;
- list_for_each_entry(rentry, &resource_list, node) {
- if (resource_contains(rentry->res, res)) {
- found = 1;
- break;
- }
- }
- acpi_dev_free_resource_list(&resource_list);
- return found;
- }
- static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth,
- void *context, void **ret)
- {
- struct resource *res = context;
- struct acpi_device **consumer = (struct acpi_device **) ret;
- struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
- if (!adev)
- return AE_OK;
- if (acpi_dev_consumes_res(adev, res)) {
- *consumer = adev;
- return AE_CTRL_TERMINATE;
- }
- return AE_OK;
- }
- /**
- * acpi_resource_consumer - Find the ACPI device that consumes @res.
- * @res: Resource to search for.
- *
- * Search the current resource settings (_CRS) of every ACPI device node
- * for @res. If we find an ACPI device whose _CRS includes @res, return
- * it. Otherwise, return NULL.
- */
- struct acpi_device *acpi_resource_consumer(struct resource *res)
- {
- struct acpi_device *consumer = NULL;
- acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer);
- return consumer;
- }
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