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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#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>#include <linux/string_choices.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 boolacpi_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;}#elsestatic 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);
if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY) res->flags |= IORESOURCE_PREFETCH; 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;
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);
/* * DMI matches for boards where the DSDT specifies the kbd IRQ as * level active-low and using the override changes this to rising edge, * stopping the keyboard from working. */static const struct dmi_system_id irq1_level_low_skip_override[] = { { /* MEDION P15651 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), DMI_MATCH(DMI_BOARD_NAME, "M15T"), }, }, { /* MEDION S17405 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), DMI_MATCH(DMI_BOARD_NAME, "M17T"), }, }, { /* MEDION S17413 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), DMI_MATCH(DMI_BOARD_NAME, "M1xA"), }, }, { /* Asus Vivobook K3402ZA */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "K3402ZA"), }, }, { /* Asus Vivobook K3502ZA */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "K3502ZA"), }, }, { /* Asus Vivobook S5402ZA */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "S5402ZA"), }, }, { /* Asus Vivobook S5602ZA */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "S5602ZA"), }, }, { /* Asus Vivobook X1404VAP */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "X1404VAP"), }, }, { /* Asus Vivobook X1504VAP */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "X1504VAP"), }, }, { /* Asus Vivobook X1704VAP */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "X1704VAP"), }, }, { /* Asus ExpertBook B1402C* */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "B1402C"), }, }, { /* Asus ExpertBook B1502C* */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "B1502C"), }, }, { /* Asus ExpertBook B2402 (B2402CBA / B2402FBA / B2402CVA / B2402FVA) */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "B2402"), }, }, { /* Asus ExpertBook B2502 (B2502CBA / B2502FBA / B2502CVA / B2502FVA) */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "B2502"), }, }, { /* Asus Vivobook Go E1404GA* */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "E1404GA"), }, }, { /* Asus Vivobook E1504GA* */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "E1504GA"), }, }, { /* Asus Vivobook Pro N6506M* */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "N6506M"), }, }, { /* Asus Vivobook Pro N6506CU* */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_MATCH(DMI_BOARD_NAME, "N6506CU"), }, }, { /* LG Electronics 17U70P */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"), DMI_MATCH(DMI_BOARD_NAME, "17U70P"), }, }, { /* LG Electronics 16T90SP */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"), DMI_MATCH(DMI_BOARD_NAME, "16T90SP"), }, }, { /* JWIPC JVC9100 */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "JVC9100"), }, }, { }};
/* * DMI matches for AMD Zen boards where the DSDT specifies the kbd IRQ * as falling edge and this must be overridden to rising edge, * to have a working keyboard. */static const struct dmi_system_id irq1_edge_low_force_override[] = { { /* MECHREVO Jiaolong17KS Series GM7XG0M */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GM7XG0M"), }, }, { /* XMG APEX 17 (M23) */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GMxBGxx"), }, }, { /* TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"), }, }, { /* TongFang GMxXGxx/TUXEDO Polaris 15 Gen5 AMD */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GMxXGxx"), }, }, { /* TongFang GMxXGxX/TUXEDO Polaris 15 Gen5 AMD */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GMxXGxX"), }, }, { /* TongFang GMxXGxx sold as Eluktronics Inc. RP-15 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Eluktronics Inc."), DMI_MATCH(DMI_BOARD_NAME, "RP-15"), }, }, { .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Eluktronics Inc."), DMI_MATCH(DMI_BOARD_NAME, "MECH-17"), }, }, { /* TongFang GM6XGxX/TUXEDO Stellaris 16 Gen5 AMD */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GM6XGxX"), }, }, { /* MAINGEAR Vector Pro 2 15 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"), DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"), } }, { /* MAINGEAR Vector Pro 2 17 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"), DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"), }, }, { /* TongFang GM6BGEQ / PCSpecialist Elimina Pro 16 M, RTX 3050 */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GM6BGEQ"), }, }, { /* TongFang GM6BG5Q, RTX 4050 */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GM6BG5Q"), }, }, { /* TongFang GM6BG0Q / PCSpecialist Elimina Pro 16 M, RTX 4060 */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GM6BG0Q"), }, }, { /* Infinity E15-5A165-BM */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GM5RG1E0009COM"), }, }, { /* Infinity E15-5A305-1M */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GM5RGEE0016COM"), }, }, { /* Lunnen Ground 15 / AMD Ryzen 5 5500U */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Lunnen"), DMI_MATCH(DMI_BOARD_NAME, "LLL5DAW"), }, }, { /* Lunnen Ground 16 / AMD Ryzen 7 5800U */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Lunnen"), DMI_MATCH(DMI_BOARD_NAME, "LL6FA"), }, }, { /* MAIBENBEN X577 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "MAIBENBEN"), DMI_MATCH(DMI_BOARD_NAME, "X577"), }, }, { /* Maibenben X565 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "MAIBENBEN"), DMI_MATCH(DMI_BOARD_NAME, "X565"), }, }, { /* TongFang GXxHRXx/TUXEDO InfinityBook Pro Gen9 AMD */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GXxHRXx"), }, }, { /* TongFang GMxHGxx/TUXEDO Stellaris Slim Gen1 AMD */ .matches = { DMI_MATCH(DMI_BOARD_NAME, "GMxHGxx"), }, }, { /* MACHENIKE L16P/L16P */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "MACHENIKE"), DMI_MATCH(DMI_BOARD_NAME, "L16P"), }, }, { /* * TongFang GM5HG0A in case of the SKIKK Vanaheim relabel the * board-name is changed, so check OEM strings instead. Note * OEM string matches are always exact matches. * https://bugzilla.kernel.org/show_bug.cgi?id=219614 */ .matches = { DMI_EXACT_MATCH(DMI_OEM_STRING, "GM5HG0A"), }, }, { }};
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[] = { { irq1_level_low_skip_override, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false }, { irq1_level_low_skip_override, 10, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 1, false }, { irq1_level_low_skip_override, 11, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 1, false }, { irq1_edge_low_force_override, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },};
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 (entry->irq == gsi && entry->triggering == triggering && entry->polarity == polarity && entry->shareable == shareable && dmi_check_system(entry->system)) 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 ? "" : "(!)", str_low_high(p), 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;}