diff options
Diffstat (limited to 'drivers/acpi/osl.c')
| -rw-r--r-- | drivers/acpi/osl.c | 958 |
1 files changed, 620 insertions, 338 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index c90c76aa7f8..bad25b070fe 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -31,6 +31,7 @@ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/mm.h> +#include <linux/highmem.h> #include <linux/pci.h> #include <linux/interrupt.h> #include <linux/kmod.h> @@ -38,7 +39,6 @@ #include <linux/workqueue.h> #include <linux/nmi.h> #include <linux/acpi.h> -#include <linux/acpi_io.h> #include <linux/efi.h> #include <linux/ioport.h> #include <linux/list.h> @@ -48,18 +48,15 @@ #include <asm/io.h> #include <asm/uaccess.h> -#include <acpi/acpi.h> -#include <acpi/acpi_bus.h> -#include <acpi/processor.h> +#include "internal.h" #define _COMPONENT ACPI_OS_SERVICES ACPI_MODULE_NAME("osl"); -#define PREFIX "ACPI: " + struct acpi_os_dpc { acpi_osd_exec_callback function; void *context; struct work_struct work; - int wait; }; #ifdef CONFIG_ACPI_CUSTOM_DSDT @@ -76,26 +73,17 @@ EXPORT_SYMBOL(acpi_in_debugger); extern char line_buf[80]; #endif /*ENABLE_DEBUGGER */ -static unsigned int acpi_irq_irq; +static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, + u32 pm1b_ctrl); +static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, + u32 val_b); + static acpi_osd_handler acpi_irq_handler; static void *acpi_irq_context; static struct workqueue_struct *kacpid_wq; static struct workqueue_struct *kacpi_notify_wq; static struct workqueue_struct *kacpi_hotplug_wq; -struct acpi_res_list { - resource_size_t start; - resource_size_t end; - acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ - char name[5]; /* only can have a length of 4 chars, make use of this - one instead of res->name, no need to kalloc then */ - struct list_head resource_list; - int count; -}; - -static LIST_HEAD(resource_list_head); -static DEFINE_SPINLOCK(acpi_res_lock); - /* * This list of permanent mappings is for memory that may be accessed from * interrupt context, where we can't do the ioremap(). @@ -105,11 +93,11 @@ struct acpi_ioremap { void __iomem *virt; acpi_physical_address phys; acpi_size size; - struct kref ref; + unsigned long refcount; }; static LIST_HEAD(acpi_ioremaps); -static DEFINE_SPINLOCK(acpi_ioremap_lock); +static DEFINE_MUTEX(acpi_ioremap_lock); static void __init acpi_osi_setup_late(void); @@ -150,13 +138,14 @@ static struct osi_linux { unsigned int enable:1; unsigned int dmi:1; unsigned int cmdline:1; -} osi_linux = {0, 0, 0}; + unsigned int default_disabling:1; +} osi_linux = {0, 0, 0, 0}; static u32 acpi_osi_handler(acpi_string interface, u32 supported) { if (!strcmp("Linux", interface)) { - printk(KERN_NOTICE FW_BUG PREFIX + printk_once(KERN_NOTICE FW_BUG PREFIX "BIOS _OSI(Linux) query %s%s\n", osi_linux.enable ? "honored" : "ignored", osi_linux.cmdline ? " via cmdline" : @@ -166,17 +155,21 @@ static u32 acpi_osi_handler(acpi_string interface, u32 supported) return supported; } -static void __init acpi_request_region (struct acpi_generic_address *addr, +static void __init acpi_request_region (struct acpi_generic_address *gas, unsigned int length, char *desc) { - if (!addr->address || !length) + u64 addr; + + /* Handle possible alignment issues */ + memcpy(&addr, &gas->address, sizeof(addr)); + if (!addr || !length) return; /* Resources are never freed */ - if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) - request_region(addr->address, length, desc); - else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) - request_mem_region(addr->address, length, desc); + if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) + request_region(addr, length, desc); + else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) + request_mem_region(addr, length, desc); } static int __init acpi_reserve_resources(void) @@ -238,9 +231,25 @@ void acpi_os_vprintf(const char *fmt, va_list args) #endif } +#ifdef CONFIG_KEXEC +static unsigned long acpi_rsdp; +static int __init setup_acpi_rsdp(char *arg) +{ + if (kstrtoul(arg, 16, &acpi_rsdp)) + return -EINVAL; + return 0; +} +early_param("acpi_rsdp", setup_acpi_rsdp); +#endif + acpi_physical_address __init acpi_os_get_root_pointer(void) { - if (efi_enabled) { +#ifdef CONFIG_KEXEC + if (acpi_rsdp) + return acpi_rsdp; +#endif + + if (efi_enabled(EFI_CONFIG_TABLES)) { if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) return efi.acpi20; else if (efi.acpi != EFI_INVALID_TABLE_ADDR) @@ -285,6 +294,22 @@ acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) return NULL; } +void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) +{ + struct acpi_ioremap *map; + void __iomem *virt = NULL; + + mutex_lock(&acpi_ioremap_lock); + map = acpi_map_lookup(phys, size); + if (map) { + virt = map->virt + (phys - map->phys); + map->refcount++; + } + mutex_unlock(&acpi_ioremap_lock); + return virt; +} +EXPORT_SYMBOL_GPL(acpi_os_get_iomem); + /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ static struct acpi_ioremap * acpi_map_lookup_virt(void __iomem *virt, acpi_size size) @@ -299,11 +324,41 @@ acpi_map_lookup_virt(void __iomem *virt, acpi_size size) return NULL; } +#ifndef CONFIG_IA64 +#define should_use_kmap(pfn) page_is_ram(pfn) +#else +/* ioremap will take care of cache attributes */ +#define should_use_kmap(pfn) 0 +#endif + +static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) +{ + unsigned long pfn; + + pfn = pg_off >> PAGE_SHIFT; + if (should_use_kmap(pfn)) { + if (pg_sz > PAGE_SIZE) + return NULL; + return (void __iomem __force *)kmap(pfn_to_page(pfn)); + } else + return acpi_os_ioremap(pg_off, pg_sz); +} + +static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) +{ + unsigned long pfn; + + pfn = pg_off >> PAGE_SHIFT; + if (should_use_kmap(pfn)) + kunmap(pfn_to_page(pfn)); + else + iounmap(vaddr); +} + void __iomem *__init_refok -acpi_os_map_memory(acpi_physical_address phys, acpi_size size) +acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) { - struct acpi_ioremap *map, *tmp_map; - unsigned long flags; + struct acpi_ioremap *map; void __iomem *virt; acpi_physical_address pg_off; acpi_size pg_sz; @@ -316,14 +371,25 @@ acpi_os_map_memory(acpi_physical_address phys, acpi_size size) if (!acpi_gbl_permanent_mmap) return __acpi_map_table((unsigned long)phys, size); + mutex_lock(&acpi_ioremap_lock); + /* Check if there's a suitable mapping already. */ + map = acpi_map_lookup(phys, size); + if (map) { + map->refcount++; + goto out; + } + map = kzalloc(sizeof(*map), GFP_KERNEL); - if (!map) + if (!map) { + mutex_unlock(&acpi_ioremap_lock); return NULL; + } pg_off = round_down(phys, PAGE_SIZE); pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; - virt = acpi_os_ioremap(pg_off, pg_sz); + virt = acpi_map(pg_off, pg_sz); if (!virt) { + mutex_unlock(&acpi_ioremap_lock); kfree(map); return NULL; } @@ -332,62 +398,64 @@ acpi_os_map_memory(acpi_physical_address phys, acpi_size size) map->virt = virt; map->phys = pg_off; map->size = pg_sz; - kref_init(&map->ref); - - spin_lock_irqsave(&acpi_ioremap_lock, flags); - /* Check if page has already been mapped. */ - tmp_map = acpi_map_lookup(phys, size); - if (tmp_map) { - kref_get(&tmp_map->ref); - spin_unlock_irqrestore(&acpi_ioremap_lock, flags); - iounmap(map->virt); - kfree(map); - return tmp_map->virt + (phys - tmp_map->phys); - } + map->refcount = 1; + list_add_tail_rcu(&map->list, &acpi_ioremaps); - spin_unlock_irqrestore(&acpi_ioremap_lock, flags); +out: + mutex_unlock(&acpi_ioremap_lock); return map->virt + (phys - map->phys); } +EXPORT_SYMBOL_GPL(acpi_os_map_iomem); + +void *__init_refok +acpi_os_map_memory(acpi_physical_address phys, acpi_size size) +{ + return (void *)acpi_os_map_iomem(phys, size); +} EXPORT_SYMBOL_GPL(acpi_os_map_memory); -static void acpi_kref_del_iomap(struct kref *ref) +static void acpi_os_drop_map_ref(struct acpi_ioremap *map) { - struct acpi_ioremap *map; + if (!--map->refcount) + list_del_rcu(&map->list); +} - map = container_of(ref, struct acpi_ioremap, ref); - list_del_rcu(&map->list); +static void acpi_os_map_cleanup(struct acpi_ioremap *map) +{ + if (!map->refcount) { + synchronize_rcu(); + acpi_unmap(map->phys, map->virt); + kfree(map); + } } -void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) +void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) { struct acpi_ioremap *map; - unsigned long flags; - int del; if (!acpi_gbl_permanent_mmap) { __acpi_unmap_table(virt, size); return; } - spin_lock_irqsave(&acpi_ioremap_lock, flags); + mutex_lock(&acpi_ioremap_lock); map = acpi_map_lookup_virt(virt, size); if (!map) { - spin_unlock_irqrestore(&acpi_ioremap_lock, flags); - printk(KERN_ERR PREFIX "%s: bad address %p\n", __func__, virt); - dump_stack(); + mutex_unlock(&acpi_ioremap_lock); + WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); return; } + acpi_os_drop_map_ref(map); + mutex_unlock(&acpi_ioremap_lock); - del = kref_put(&map->ref, acpi_kref_del_iomap); - spin_unlock_irqrestore(&acpi_ioremap_lock, flags); - - if (!del) - return; + acpi_os_map_cleanup(map); +} +EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); - synchronize_rcu(); - iounmap(map->virt); - kfree(map); +void __ref acpi_os_unmap_memory(void *virt, acpi_size size) +{ + return acpi_os_unmap_iomem((void __iomem *)virt, size); } EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); @@ -397,43 +465,52 @@ void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) __acpi_unmap_table(virt, size); } -int acpi_os_map_generic_address(struct acpi_generic_address *addr) +int acpi_os_map_generic_address(struct acpi_generic_address *gas) { + u64 addr; void __iomem *virt; - if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) + if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) return 0; - if (!addr->address || !addr->bit_width) + /* Handle possible alignment issues */ + memcpy(&addr, &gas->address, sizeof(addr)); + if (!addr || !gas->bit_width) return -EINVAL; - virt = acpi_os_map_memory(addr->address, addr->bit_width / 8); + virt = acpi_os_map_iomem(addr, gas->bit_width / 8); if (!virt) return -EIO; return 0; } -EXPORT_SYMBOL_GPL(acpi_os_map_generic_address); +EXPORT_SYMBOL(acpi_os_map_generic_address); -void acpi_os_unmap_generic_address(struct acpi_generic_address *addr) +void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) { - void __iomem *virt; - unsigned long flags; - acpi_size size = addr->bit_width / 8; + u64 addr; + struct acpi_ioremap *map; - if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) + if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) return; - if (!addr->address || !addr->bit_width) + /* Handle possible alignment issues */ + memcpy(&addr, &gas->address, sizeof(addr)); + if (!addr || !gas->bit_width) return; - spin_lock_irqsave(&acpi_ioremap_lock, flags); - virt = acpi_map_vaddr_lookup(addr->address, size); - spin_unlock_irqrestore(&acpi_ioremap_lock, flags); + mutex_lock(&acpi_ioremap_lock); + map = acpi_map_lookup(addr, gas->bit_width / 8); + if (!map) { + mutex_unlock(&acpi_ioremap_lock); + return; + } + acpi_os_drop_map_ref(map); + mutex_unlock(&acpi_ioremap_lock); - acpi_os_unmap_memory(virt, size); + acpi_os_map_cleanup(map); } -EXPORT_SYMBOL_GPL(acpi_os_unmap_generic_address); +EXPORT_SYMBOL(acpi_os_unmap_generic_address); #ifdef ACPI_FUTURE_USAGE acpi_status @@ -469,6 +546,161 @@ acpi_os_predefined_override(const struct acpi_predefined_names *init_val, return AE_OK; } +#ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE +#include <linux/earlycpio.h> +#include <linux/memblock.h> + +static u64 acpi_tables_addr; +static int all_tables_size; + +/* Copied from acpica/tbutils.c:acpi_tb_checksum() */ +static u8 __init acpi_table_checksum(u8 *buffer, u32 length) +{ + u8 sum = 0; + u8 *end = buffer + length; + + while (buffer < end) + sum = (u8) (sum + *(buffer++)); + return sum; +} + +/* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ +static const char * const table_sigs[] = { + ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, + ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, + ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, + ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, + ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, + ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, + ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, + ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, + ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; + +#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) + +#define ACPI_OVERRIDE_TABLES 64 +static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; + +#define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) + +void __init acpi_initrd_override(void *data, size_t size) +{ + int sig, no, table_nr = 0, total_offset = 0; + long offset = 0; + struct acpi_table_header *table; + char cpio_path[32] = "kernel/firmware/acpi/"; + struct cpio_data file; + + if (data == NULL || size == 0) + return; + + for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { + file = find_cpio_data(cpio_path, data, size, &offset); + if (!file.data) + break; + + data += offset; + size -= offset; + + if (file.size < sizeof(struct acpi_table_header)) { + pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", + cpio_path, file.name); + continue; + } + + table = file.data; + + for (sig = 0; table_sigs[sig]; sig++) + if (!memcmp(table->signature, table_sigs[sig], 4)) + break; + + if (!table_sigs[sig]) { + pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", + cpio_path, file.name); + continue; + } + if (file.size != table->length) { + pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", + cpio_path, file.name); + continue; + } + if (acpi_table_checksum(file.data, table->length)) { + pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", + cpio_path, file.name); + continue; + } + + pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", + table->signature, cpio_path, file.name, table->length); + + all_tables_size += table->length; + acpi_initrd_files[table_nr].data = file.data; + acpi_initrd_files[table_nr].size = file.size; + table_nr++; + } + if (table_nr == 0) + return; + + acpi_tables_addr = + memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, + all_tables_size, PAGE_SIZE); + if (!acpi_tables_addr) { + WARN_ON(1); + return; + } + /* + * Only calling e820_add_reserve does not work and the + * tables are invalid (memory got used) later. + * memblock_reserve works as expected and the tables won't get modified. + * But it's not enough on X86 because ioremap will + * complain later (used by acpi_os_map_memory) that the pages + * that should get mapped are not marked "reserved". + * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) + * works fine. + */ + memblock_reserve(acpi_tables_addr, all_tables_size); + arch_reserve_mem_area(acpi_tables_addr, all_tables_size); + + /* + * early_ioremap only can remap 256k one time. If we map all + * tables one time, we will hit the limit. Need to map chunks + * one by one during copying the same as that in relocate_initrd(). + */ + for (no = 0; no < table_nr; no++) { + unsigned char *src_p = acpi_initrd_files[no].data; + phys_addr_t size = acpi_initrd_files[no].size; + phys_addr_t dest_addr = acpi_tables_addr + total_offset; + phys_addr_t slop, clen; + char *dest_p; + + total_offset += size; + + while (size) { + slop = dest_addr & ~PAGE_MASK; + clen = size; + if (clen > MAP_CHUNK_SIZE - slop) + clen = MAP_CHUNK_SIZE - slop; + dest_p = early_ioremap(dest_addr & PAGE_MASK, + clen + slop); + memcpy(dest_p + slop, src_p, clen); + early_iounmap(dest_p, clen + slop); + src_p += clen; + dest_addr += clen; + size -= clen; + } + } +} +#endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ + +static void acpi_table_taint(struct acpi_table_header *table) +{ + pr_warn(PREFIX + "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", + table->signature, table->oem_table_id); + add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); +} + + acpi_status acpi_os_table_override(struct acpi_table_header * existing_table, struct acpi_table_header ** new_table) @@ -482,14 +714,72 @@ acpi_os_table_override(struct acpi_table_header * existing_table, if (strncmp(existing_table->signature, "DSDT", 4) == 0) *new_table = (struct acpi_table_header *)AmlCode; #endif - if (*new_table != NULL) { - printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " - "this is unsafe: tainting kernel\n", - existing_table->signature, - existing_table->oem_table_id); - add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); - } + if (*new_table != NULL) + acpi_table_taint(existing_table); + return AE_OK; +} + +acpi_status +acpi_os_physical_table_override(struct acpi_table_header *existing_table, + acpi_physical_address *address, + u32 *table_length) +{ +#ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE + *table_length = 0; + *address = 0; return AE_OK; +#else + int table_offset = 0; + struct acpi_table_header *table; + + *table_length = 0; + *address = 0; + + if (!acpi_tables_addr) + return AE_OK; + + do { + if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { + WARN_ON(1); + return AE_OK; + } + + table = acpi_os_map_memory(acpi_tables_addr + table_offset, + ACPI_HEADER_SIZE); + + if (table_offset + table->length > all_tables_size) { + acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); + WARN_ON(1); + return AE_OK; + } + + table_offset += table->length; + + if (memcmp(existing_table->signature, table->signature, 4)) { + acpi_os_unmap_memory(table, + ACPI_HEADER_SIZE); + continue; + } + + /* Only override tables with matching oem id */ + if (memcmp(table->oem_table_id, existing_table->oem_table_id, + ACPI_OEM_TABLE_ID_SIZE)) { + acpi_os_unmap_memory(table, + ACPI_HEADER_SIZE); + continue; + } + + table_offset -= table->length; + *table_length = table->length; + acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); + *address = acpi_tables_addr + table_offset; + break; + } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); + + if (*address != 0) + acpi_table_taint(existing_table); + return AE_OK; +#endif } static irqreturn_t acpi_irq(int irq, void *dev_id) @@ -516,11 +806,15 @@ acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, acpi_irq_stats_init(); /* - * Ignore the GSI from the core, and use the value in our copy of the - * FADT. It may not be the same if an interrupt source override exists - * for the SCI. + * ACPI interrupts different from the SCI in our copy of the FADT are + * not supported. */ - gsi = acpi_gbl_FADT.sci_interrupt; + if (gsi != acpi_gbl_FADT.sci_interrupt) + return AE_BAD_PARAMETER; + + if (acpi_irq_handler) + return AE_ALREADY_ACQUIRED; + if (acpi_gsi_to_irq(gsi, &irq) < 0) { printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", gsi); @@ -529,22 +823,22 @@ acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, acpi_irq_handler = handler; acpi_irq_context = context; - if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { + if (request_irq(irq, acpi_irq, IRQF_SHARED | IRQF_NO_SUSPEND, "acpi", acpi_irq)) { printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); + acpi_irq_handler = NULL; return AE_NOT_ACQUIRED; } - acpi_irq_irq = irq; return AE_OK; } acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) { - if (irq) { - free_irq(irq, acpi_irq); - acpi_irq_handler = NULL; - acpi_irq_irq = 0; - } + if (irq != acpi_gbl_FADT.sci_interrupt) + return AE_BAD_PARAMETER; + + free_irq(irq, acpi_irq); + acpi_irq_handler = NULL; return AE_OK; } @@ -555,7 +849,7 @@ acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) void acpi_os_sleep(u64 ms) { - schedule_timeout_interruptible(msecs_to_jiffies(ms)); + msleep(ms); } void acpi_os_stall(u32 us) @@ -578,19 +872,9 @@ void acpi_os_stall(u32 us) */ u64 acpi_os_get_timer(void) { - static u64 t; - -#ifdef CONFIG_HPET - /* TBD: use HPET if available */ -#endif - -#ifdef CONFIG_X86_PM_TIMER - /* TBD: default to PM timer if HPET was not available */ -#endif - if (!t) - printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); - - return ++t; + u64 time_ns = ktime_to_ns(ktime_get()); + do_div(time_ns, 100); + return time_ns; } acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) @@ -633,13 +917,28 @@ acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) EXPORT_SYMBOL(acpi_os_write_port); +#ifdef readq +static inline u64 read64(const volatile void __iomem *addr) +{ + return readq(addr); +} +#else +static inline u64 read64(const volatile void __iomem *addr) +{ + u64 l, h; + l = readl(addr); + h = readl(addr+4); + return l | (h << 32); +} +#endif + acpi_status -acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) +acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) { void __iomem *virt_addr; unsigned int size = width / 8; bool unmap = false; - u32 dummy; + u64 dummy; rcu_read_lock(); virt_addr = acpi_map_vaddr_lookup(phys_addr, size); @@ -664,6 +963,9 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) case 32: *(u32 *) value = readl(virt_addr); break; + case 64: + *(u64 *) value = read64(virt_addr); + break; default: BUG(); } @@ -676,8 +978,21 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) return AE_OK; } +#ifdef writeq +static inline void write64(u64 val, volatile void __iomem *addr) +{ + writeq(val, addr); +} +#else +static inline void write64(u64 val, volatile void __iomem *addr) +{ + writel(val, addr); + writel(val>>32, addr+4); +} +#endif + acpi_status -acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) +acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) { void __iomem *virt_addr; unsigned int size = width / 8; @@ -703,6 +1018,9 @@ acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) case 32: writel(value, virt_addr); break; + case 64: + write64(value, virt_addr); + break; default: BUG(); } @@ -778,9 +1096,6 @@ static void acpi_os_execute_deferred(struct work_struct *work) { struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); - if (dpc->wait) - acpi_os_wait_events_complete(NULL); - dpc->function(dpc->context); kfree(dpc); } @@ -800,8 +1115,8 @@ static void acpi_os_execute_deferred(struct work_struct *work) * ******************************************************************************/ -static acpi_status __acpi_os_execute(acpi_execute_type type, - acpi_osd_exec_callback function, void *context, int hp) +acpi_status acpi_os_execute(acpi_execute_type type, + acpi_osd_exec_callback function, void *context) { acpi_status status = AE_OK; struct acpi_os_dpc *dpc; @@ -820,7 +1135,7 @@ static acpi_status __acpi_os_execute(acpi_execute_type type, * having a static work_struct. */ - dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); + dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); if (!dpc) return AE_NO_MEMORY; @@ -828,21 +1143,17 @@ static acpi_status __acpi_os_execute(acpi_execute_type type, dpc->context = context; /* - * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq - * because the hotplug code may call driver .remove() functions, - * which invoke flush_scheduled_work/acpi_os_wait_events_complete - * to flush these workqueues. + * To prevent lockdep from complaining unnecessarily, make sure that + * there is a different static lockdep key for each workqueue by using + * INIT_WORK() for each of them separately. */ - queue = hp ? kacpi_hotplug_wq : - (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); - dpc->wait = hp ? 1 : 0; - - if (queue == kacpi_hotplug_wq) + if (type == OSL_NOTIFY_HANDLER) { + queue = kacpi_notify_wq; INIT_WORK(&dpc->work, acpi_os_execute_deferred); - else if (queue == kacpi_notify_wq) - INIT_WORK(&dpc->work, acpi_os_execute_deferred); - else + } else { + queue = kacpid_wq; INIT_WORK(&dpc->work, acpi_os_execute_deferred); + } /* * On some machines, a software-initiated SMI causes corruption unless @@ -861,34 +1172,60 @@ static acpi_status __acpi_os_execute(acpi_execute_type type, } return status; } +EXPORT_SYMBOL(acpi_os_execute); -acpi_status acpi_os_execute(acpi_execute_type type, - acpi_osd_exec_callback function, void *context) +void acpi_os_wait_events_complete(void) { - return __acpi_os_execute(type, function, context, 0); + flush_workqueue(kacpid_wq); + flush_workqueue(kacpi_notify_wq); } -EXPORT_SYMBOL(acpi_os_execute); -acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, - void *context) +struct acpi_hp_work { + struct work_struct work; + struct acpi_device *adev; + u32 src; +}; + +static void acpi_hotplug_work_fn(struct work_struct *work) { - return __acpi_os_execute(0, function, context, 1); + struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); + + acpi_os_wait_events_complete(); + acpi_device_hotplug(hpw->adev, hpw->src); + kfree(hpw); } -void acpi_os_wait_events_complete(void *context) +acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) { - flush_workqueue(kacpid_wq); - flush_workqueue(kacpi_notify_wq); -} + struct acpi_hp_work *hpw; -EXPORT_SYMBOL(acpi_os_wait_events_complete); + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Scheduling hotplug event (%p, %u) for deferred execution.\n", + adev, src)); -/* - * Deallocate the memory for a spinlock. - */ -void acpi_os_delete_lock(acpi_spinlock handle) + hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); + if (!hpw) + return AE_NO_MEMORY; + + INIT_WORK(&hpw->work, acpi_hotplug_work_fn); + hpw->adev = adev; + hpw->src = src; + /* + * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because + * the hotplug code may call driver .remove() functions, which may + * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush + * these workqueues. + */ + if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { + kfree(hpw); + return AE_ERROR; + } + return AE_OK; +} + +bool acpi_queue_hotplug_work(struct work_struct *work) { - return; + return queue_work(kacpi_hotplug_wq, work); } acpi_status @@ -896,10 +1233,9 @@ acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) { struct semaphore *sem = NULL; - sem = acpi_os_allocate(sizeof(struct semaphore)); + sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); if (!sem) return AE_NO_MEMORY; - memset(sem, 0, sizeof(struct semaphore)); sema_init(sem, initial_units); @@ -957,7 +1293,7 @@ acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) jiffies = MAX_SCHEDULE_TIMEOUT; else jiffies = msecs_to_jiffies(timeout); - + ret = down_timeout(sem, jiffies); if (ret) status = AE_TIME; @@ -1048,7 +1384,7 @@ static int __init acpi_os_name_setup(char *str) if (!str || !*str) return 0; - for (; count-- && str && *str; str++) { + for (; count-- && *str; str++) { if (isalnum(*str) || *str == ' ' || *str == ':') *p++ = *str; else if (*str == '\'' || *str == '"') @@ -1072,7 +1408,13 @@ struct osi_setup_entry { bool enable; }; -static struct osi_setup_entry __initdata osi_setup_entries[OSI_STRING_ENTRIES_MAX]; +static struct osi_setup_entry + osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { + {"Module Device", true}, + {"Processor Device", true}, + {"3.0 _SCP Extensions", true}, + {"Processor Aggregator Device", true}, +}; void __init acpi_osi_setup(char *str) { @@ -1091,6 +1433,17 @@ void __init acpi_osi_setup(char *str) if (*str == '!') { str++; + if (*str == '\0') { + osi_linux.default_disabling = 1; + return; + } else if (*str == '*') { + acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); + for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { + osi = &osi_setup_entries[i]; + osi->enable = false; + } + return; + } enable = false; } @@ -1156,6 +1509,13 @@ static void __init acpi_osi_setup_late(void) int i; acpi_status status; + if (osi_linux.default_disabling) { + status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); + + if (ACPI_SUCCESS(status)) + printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n"); + } + for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { osi = &osi_setup_entries[i]; str = osi->string; @@ -1190,17 +1550,21 @@ static int __init osi_setup(char *str) __setup("acpi_osi=", osi_setup); -/* enable serialization to combat AE_ALREADY_EXISTS errors */ -static int __init acpi_serialize_setup(char *str) +/* + * Disable the auto-serialization of named objects creation methods. + * + * This feature is enabled by default. It marks the AML control methods + * that contain the opcodes to create named objects as "Serialized". + */ +static int __init acpi_no_auto_serialize_setup(char *str) { - printk(KERN_INFO PREFIX "serialize enabled\n"); - - acpi_gbl_all_methods_serialized = TRUE; + acpi_gbl_auto_serialize_methods = FALSE; + pr_info("ACPI: auto-serialization disabled\n"); return 1; } -__setup("acpi_serialize", acpi_serialize_setup); +__setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); /* Check of resource interference between native drivers and ACPI * OperationRegions (SystemIO and System Memory only). @@ -1245,44 +1609,28 @@ __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); * drivers */ int acpi_check_resource_conflict(const struct resource *res) { - struct acpi_res_list *res_list_elem; - int ioport = 0, clash = 0; + acpi_adr_space_type space_id; + acpi_size length; + u8 warn = 0; + int clash = 0; if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) return 0; if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) return 0; - ioport = res->flags & IORESOURCE_IO; - - spin_lock(&acpi_res_lock); - list_for_each_entry(res_list_elem, &resource_list_head, - resource_list) { - if (ioport && (res_list_elem->resource_type - != ACPI_ADR_SPACE_SYSTEM_IO)) - continue; - if (!ioport && (res_list_elem->resource_type - != ACPI_ADR_SPACE_SYSTEM_MEMORY)) - continue; + if (res->flags & IORESOURCE_IO) + space_id = ACPI_ADR_SPACE_SYSTEM_IO; + else + space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; - if (res->end < res_list_elem->start - || res_list_elem->end < res->start) - continue; - clash = 1; - break; - } - spin_unlock(&acpi_res_lock); + length = resource_size(res); + if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) + warn = 1; + clash = acpi_check_address_range(space_id, res->start, length, warn); if (clash) { if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { - printk(KERN_WARNING "ACPI: resource %s %pR" - " conflicts with ACPI region %s " - "[%s 0x%zx-0x%zx]\n", - res->name, res, res_list_elem->name, - (res_list_elem->resource_type == - ACPI_ADR_SPACE_SYSTEM_IO) ? "io" : "mem", - (size_t) res_list_elem->start, - (size_t) res_list_elem->end); if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) printk(KERN_NOTICE "ACPI: This conflict may" " cause random problems and system" @@ -1322,6 +1670,14 @@ int acpi_resources_are_enforced(void) EXPORT_SYMBOL(acpi_resources_are_enforced); /* + * Deallocate the memory for a spinlock. + */ +void acpi_os_delete_lock(acpi_spinlock handle) +{ + ACPI_FREE(handle); +} + +/* * Acquire a spinlock. * * handle is a pointer to the spinlock_t. @@ -1426,156 +1782,28 @@ acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) kmem_cache_free(cache, object); return (AE_OK); } +#endif -static inline int acpi_res_list_add(struct acpi_res_list *res) +static int __init acpi_no_static_ssdt_setup(char *s) { - struct acpi_res_list *res_list_elem; + acpi_gbl_disable_ssdt_table_install = TRUE; + pr_info("ACPI: static SSDT installation disabled\n"); - list_for_each_entry(res_list_elem, &resource_list_head, - resource_list) { - - if (res->resource_type == res_list_elem->resource_type && - res->start == res_list_elem->start && - res->end == res_list_elem->end) { - - /* - * The Region(addr,len) already exist in the list, - * just increase the count - */ - - res_list_elem->count++; - return 0; - } - } - - res->count = 1; - list_add(&res->resource_list, &resource_list_head); - return 1; + return 0; } -static inline void acpi_res_list_del(struct acpi_res_list *res) -{ - struct acpi_res_list *res_list_elem; - - list_for_each_entry(res_list_elem, &resource_list_head, - resource_list) { - - if (res->resource_type == res_list_elem->resource_type && - res->start == res_list_elem->start && - res->end == res_list_elem->end) { +early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); - /* - * If the res count is decreased to 0, - * remove and free it - */ - - if (--res_list_elem->count == 0) { - list_del(&res_list_elem->resource_list); - kfree(res_list_elem); - } - return; - } - } -} +static int __init acpi_disable_return_repair(char *s) +{ + printk(KERN_NOTICE PREFIX + "ACPI: Predefined validation mechanism disabled\n"); + acpi_gbl_disable_auto_repair = TRUE; -acpi_status -acpi_os_invalidate_address( - u8 space_id, - acpi_physical_address address, - acpi_size length) -{ - struct acpi_res_list res; - - switch (space_id) { - case ACPI_ADR_SPACE_SYSTEM_IO: - case ACPI_ADR_SPACE_SYSTEM_MEMORY: - /* Only interference checks against SystemIO and SystemMemory - are needed */ - res.start = address; - res.end = address + length - 1; - res.resource_type = space_id; - spin_lock(&acpi_res_lock); - acpi_res_list_del(&res); - spin_unlock(&acpi_res_lock); - break; - case ACPI_ADR_SPACE_PCI_CONFIG: - case ACPI_ADR_SPACE_EC: - case ACPI_ADR_SPACE_SMBUS: - case ACPI_ADR_SPACE_CMOS: - case ACPI_ADR_SPACE_PCI_BAR_TARGET: - case ACPI_ADR_SPACE_DATA_TABLE: - case ACPI_ADR_SPACE_FIXED_HARDWARE: - break; - } - return AE_OK; + return 1; } -/****************************************************************************** - * - * FUNCTION: acpi_os_validate_address - * - * PARAMETERS: space_id - ACPI space ID - * address - Physical address - * length - Address length - * - * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, - * should return AE_AML_ILLEGAL_ADDRESS. - * - * DESCRIPTION: Validate a system address via the host OS. Used to validate - * the addresses accessed by AML operation regions. - * - *****************************************************************************/ - -acpi_status -acpi_os_validate_address ( - u8 space_id, - acpi_physical_address address, - acpi_size length, - char *name) -{ - struct acpi_res_list *res; - int added; - if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) - return AE_OK; - - switch (space_id) { - case ACPI_ADR_SPACE_SYSTEM_IO: - case ACPI_ADR_SPACE_SYSTEM_MEMORY: - /* Only interference checks against SystemIO and SystemMemory - are needed */ - res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); - if (!res) - return AE_OK; - /* ACPI names are fixed to 4 bytes, still better use strlcpy */ - strlcpy(res->name, name, 5); - res->start = address; - res->end = address + length - 1; - res->resource_type = space_id; - spin_lock(&acpi_res_lock); - added = acpi_res_list_add(res); - spin_unlock(&acpi_res_lock); - pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, " - "name: %s\n", added ? "Added" : "Already exist", - (space_id == ACPI_ADR_SPACE_SYSTEM_IO) - ? "SystemIO" : "System Memory", - (unsigned long long)res->start, - (unsigned long long)res->end, - res->name); - if (!added) - kfree(res); - break; - case ACPI_ADR_SPACE_PCI_CONFIG: - case ACPI_ADR_SPACE_EC: - case ACPI_ADR_SPACE_SMBUS: - case ACPI_ADR_SPACE_CMOS: - case ACPI_ADR_SPACE_PCI_BAR_TARGET: - case ACPI_ADR_SPACE_DATA_TABLE: - case ACPI_ADR_SPACE_FIXED_HARDWARE: - break; - } - return AE_OK; -} -#endif +__setup("acpica_no_return_repair", acpi_disable_return_repair); acpi_status __init acpi_os_initialize(void) { @@ -1583,15 +1811,25 @@ acpi_status __init acpi_os_initialize(void) acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); + if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { + /* + * Use acpi_os_map_generic_address to pre-map the reset + * register if it's in system memory. + */ + int rv; + + rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); + pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); + } return AE_OK; } acpi_status __init acpi_os_initialize1(void) { - kacpid_wq = create_workqueue("kacpid"); - kacpi_notify_wq = create_workqueue("kacpi_notify"); - kacpi_hotplug_wq = create_workqueue("kacpi_hotplug"); + kacpid_wq = alloc_workqueue("kacpid", 0, 1); + kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); + kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); BUG_ON(!kacpid_wq); BUG_ON(!kacpi_notify_wq); BUG_ON(!kacpi_hotplug_wq); @@ -1603,7 +1841,7 @@ acpi_status __init acpi_os_initialize1(void) acpi_status acpi_os_terminate(void) { if (acpi_irq_handler) { - acpi_os_remove_interrupt_handler(acpi_irq_irq, + acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, acpi_irq_handler); } @@ -1611,6 +1849,8 @@ acpi_status acpi_os_terminate(void) acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); + if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) + acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); destroy_workqueue(kacpid_wq); destroy_workqueue(kacpi_notify_wq); @@ -1618,3 +1858,45 @@ acpi_status acpi_os_terminate(void) return AE_OK; } + +acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, + u32 pm1b_control) +{ + int rc = 0; + if (__acpi_os_prepare_sleep) + rc = __acpi_os_prepare_sleep(sleep_state, + pm1a_control, pm1b_control); + if (rc < 0) + return AE_ERROR; + else if (rc > 0) + return AE_CTRL_SKIP; + + return AE_OK; +} + +void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, + u32 pm1a_ctrl, u32 pm1b_ctrl)) +{ + __acpi_os_prepare_sleep = func; +} + +acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, + u32 val_b) +{ + int rc = 0; + if (__acpi_os_prepare_extended_sleep) + rc = __acpi_os_prepare_extended_sleep(sleep_state, + val_a, val_b); + if (rc < 0) + return AE_ERROR; + else if (rc > 0) + return AE_CTRL_SKIP; + + return AE_OK; +} + +void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, + u32 val_a, u32 val_b)) +{ + __acpi_os_prepare_extended_sleep = func; +} |