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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/acpi/resource.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/acpi/resource.c')
-rw-r--r--drivers/acpi/resource.c1039
1 files changed, 1039 insertions, 0 deletions
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
new file mode 100644
index 0000000000..85ae394e79
--- /dev/null
+++ b/drivers/acpi/resource.c
@@ -0,0 +1,1039 @@
+// 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 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 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"),
+ }
+ },
+ {
+ /* 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"),
+ },
+ },
+ {
+ /* 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 pcspecialist_laptop[] = {
+ {
+ /* 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"),
+ },
+ },
+ { }
+};
+
+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;
+}