| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * drivers/acpi/resource.c - ACPI device resources interpretation. |
| * |
| * Copyright (C) 2012, Intel Corp. |
| * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| */ |
| |
| #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 B1502CBA", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "B1502CBA"), |
| }, |
| }, |
| { |
| .ident = "Asus ExpertBook B2402CBA", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "B2402CBA"), |
| }, |
| }, |
| { |
| .ident = "Asus ExpertBook B2402FBA", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), |
| DMI_MATCH(DMI_BOARD_NAME, "B2402FBA"), |
| }, |
| }, |
| { |
| .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 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"), |
| } |
| }, |
| { |
| .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 pcspecialist_laptop[] = { |
| { |
| .ident = "PCSpecialist Elimina Pro 16 M", |
| /* |
| * Some models have product-name "Elimina Pro 16 M", |
| * others "GM6BGEQ". Match on board-name to match both. |
| */ |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "PCSpecialist"), |
| DMI_MATCH(DMI_BOARD_NAME, "GM6BGEQ"), |
| }, |
| }, |
| { } |
| }; |
| |
| 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 }, |
| { tongfang_gm_rg, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true }, |
| { maingear_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true }, |
| { pcspecialist_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 |
| /* |
| * Always use the MADT override info, except for the i8042 PS/2 ctrl |
| * IRQs (1 and 12). For these the DSDT IRQ settings should sometimes |
| * be used otherwise PS/2 keyboards / mice will not work. |
| */ |
| if (gsi != 1 && gsi != 12) |
| return true; |
| |
| /* If the override comes from an INT_SRC_OVR MADT entry, honor it. */ |
| if (acpi_int_src_ovr[gsi]) |
| return true; |
| |
| /* |
| * 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; |
| } |