diff options
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/Makefile | 1 | ||||
-rw-r--r-- | drivers/acpi/acpi_lpss.c | 21 | ||||
-rw-r--r-- | drivers/acpi/acpi_memhotplug.c | 62 | ||||
-rw-r--r-- | drivers/acpi/acpi_processor.c | 494 | ||||
-rw-r--r-- | drivers/acpi/apei/cper.c | 18 | ||||
-rw-r--r-- | drivers/acpi/apei/ghes.c | 11 | ||||
-rw-r--r-- | drivers/acpi/device_pm.c | 30 | ||||
-rw-r--r-- | drivers/acpi/dock.c | 181 | ||||
-rw-r--r-- | drivers/acpi/glue.c | 6 | ||||
-rw-r--r-- | drivers/acpi/internal.h | 10 | ||||
-rw-r--r-- | drivers/acpi/power.c | 1 | ||||
-rw-r--r-- | drivers/acpi/processor_driver.c | 812 | ||||
-rw-r--r-- | drivers/acpi/resource.c | 16 | ||||
-rw-r--r-- | drivers/acpi/scan.c | 126 | ||||
-rw-r--r-- | drivers/acpi/sysfs.c | 31 | ||||
-rw-r--r-- | drivers/acpi/video.c | 19 |
16 files changed, 966 insertions, 873 deletions
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 536562c..d07771b 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -34,6 +34,7 @@ acpi-$(CONFIG_ACPI_SLEEP) += proc.o acpi-y += bus.o glue.o acpi-y += scan.o acpi-y += resource.o +acpi-y += acpi_processor.o acpi-y += processor_core.o acpi-y += ec.o acpi-$(CONFIG_ACPI_DOCK) += dock.o diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c index 652fd5c..cab13f2 100644 --- a/drivers/acpi/acpi_lpss.c +++ b/drivers/acpi/acpi_lpss.c @@ -164,15 +164,24 @@ static int acpi_lpss_create_device(struct acpi_device *adev, if (dev_desc->clk_required) { ret = register_device_clock(adev, pdata); if (ret) { - /* - * Skip the device, but don't terminate the namespace - * scan. - */ - kfree(pdata); - return 0; + /* Skip the device, but continue the namespace scan. */ + ret = 0; + goto err_out; } } + /* + * This works around a known issue in ACPI tables where LPSS devices + * have _PS0 and _PS3 without _PSC (and no power resources), so + * acpi_bus_init_power() will assume that the BIOS has put them into D0. + */ + ret = acpi_device_fix_up_power(adev); + if (ret) { + /* Skip the device, but continue the namespace scan. */ + ret = 0; + goto err_out; + } + adev->driver_data = pdata; ret = acpi_create_platform_device(adev, id); if (ret > 0) diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index 5e6301e..c711d11 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -28,6 +28,7 @@ */ #include <linux/acpi.h> +#include <linux/memory.h> #include <linux/memory_hotplug.h> #include "internal.h" @@ -166,13 +167,50 @@ static int acpi_memory_check_device(struct acpi_memory_device *mem_device) return 0; } +static unsigned long acpi_meminfo_start_pfn(struct acpi_memory_info *info) +{ + return PFN_DOWN(info->start_addr); +} + +static unsigned long acpi_meminfo_end_pfn(struct acpi_memory_info *info) +{ + return PFN_UP(info->start_addr + info->length-1); +} + +static int acpi_bind_memblk(struct memory_block *mem, void *arg) +{ + return acpi_bind_one(&mem->dev, (acpi_handle)arg); +} + +static int acpi_bind_memory_blocks(struct acpi_memory_info *info, + acpi_handle handle) +{ + return walk_memory_range(acpi_meminfo_start_pfn(info), + acpi_meminfo_end_pfn(info), (void *)handle, + acpi_bind_memblk); +} + +static int acpi_unbind_memblk(struct memory_block *mem, void *arg) +{ + acpi_unbind_one(&mem->dev); + return 0; +} + +static void acpi_unbind_memory_blocks(struct acpi_memory_info *info, + acpi_handle handle) +{ + walk_memory_range(acpi_meminfo_start_pfn(info), + acpi_meminfo_end_pfn(info), NULL, acpi_unbind_memblk); +} + static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) { + acpi_handle handle = mem_device->device->handle; int result, num_enabled = 0; struct acpi_memory_info *info; int node; - node = acpi_get_node(mem_device->device->handle); + node = acpi_get_node(handle); /* * Tell the VM there is more memory here... * Note: Assume that this function returns zero on success @@ -203,6 +241,12 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) if (result && result != -EEXIST) continue; + result = acpi_bind_memory_blocks(info, handle); + if (result) { + acpi_unbind_memory_blocks(info, handle); + return -ENODEV; + } + info->enabled = 1; /* @@ -227,12 +271,11 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) return 0; } -static int acpi_memory_remove_memory(struct acpi_memory_device *mem_device) +static void acpi_memory_remove_memory(struct acpi_memory_device *mem_device) { - int result = 0, nid; + acpi_handle handle = mem_device->device->handle; struct acpi_memory_info *info, *n; - - nid = acpi_get_node(mem_device->device->handle); + int nid = acpi_get_node(handle); list_for_each_entry_safe(info, n, &mem_device->res_list, list) { if (!info->enabled) @@ -240,15 +283,12 @@ static int acpi_memory_remove_memory(struct acpi_memory_device *mem_device) if (nid < 0) nid = memory_add_physaddr_to_nid(info->start_addr); - result = remove_memory(nid, info->start_addr, info->length); - if (result) - return result; + acpi_unbind_memory_blocks(info, handle); + remove_memory(nid, info->start_addr, info->length); list_del(&info->list); kfree(info); } - - return result; } static void acpi_memory_device_free(struct acpi_memory_device *mem_device) @@ -300,7 +340,7 @@ static int acpi_memory_device_add(struct acpi_device *device, if (result) { dev_err(&device->dev, "acpi_memory_enable_device() error\n"); acpi_memory_device_free(mem_device); - return -ENODEV; + return result; } dev_dbg(&device->dev, "Memory device configured by ACPI\n"); diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c new file mode 100644 index 0000000..e9b01e3 --- /dev/null +++ b/drivers/acpi/acpi_processor.c @@ -0,0 +1,494 @@ +/* + * acpi_processor.c - ACPI processor enumeration support + * + * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> + * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> + * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de> + * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> + * Copyright (C) 2013, Intel Corporation + * Rafael J. Wysocki <rafael.j.wysocki@intel.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include <linux/acpi.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> + +#include <acpi/processor.h> + +#include <asm/cpu.h> + +#include "internal.h" + +#define _COMPONENT ACPI_PROCESSOR_COMPONENT + +ACPI_MODULE_NAME("processor"); + +DEFINE_PER_CPU(struct acpi_processor *, processors); +EXPORT_PER_CPU_SYMBOL(processors); + +/* -------------------------------------------------------------------------- + Errata Handling + -------------------------------------------------------------------------- */ + +struct acpi_processor_errata errata __read_mostly; +EXPORT_SYMBOL_GPL(errata); + +static int acpi_processor_errata_piix4(struct pci_dev *dev) +{ + u8 value1 = 0; + u8 value2 = 0; + + + if (!dev) + return -EINVAL; + + /* + * Note that 'dev' references the PIIX4 ACPI Controller. + */ + + switch (dev->revision) { + case 0: + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); + break; + case 1: + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); + break; + case 2: + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); + break; + case 3: + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); + break; + default: + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); + break; + } + + switch (dev->revision) { + + case 0: /* PIIX4 A-step */ + case 1: /* PIIX4 B-step */ + /* + * See specification changes #13 ("Manual Throttle Duty Cycle") + * and #14 ("Enabling and Disabling Manual Throttle"), plus + * erratum #5 ("STPCLK# Deassertion Time") from the January + * 2002 PIIX4 specification update. Applies to only older + * PIIX4 models. + */ + errata.piix4.throttle = 1; + + case 2: /* PIIX4E */ + case 3: /* PIIX4M */ + /* + * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA + * Livelock") from the January 2002 PIIX4 specification update. + * Applies to all PIIX4 models. + */ + + /* + * BM-IDE + * ------ + * Find the PIIX4 IDE Controller and get the Bus Master IDE + * Status register address. We'll use this later to read + * each IDE controller's DMA status to make sure we catch all + * DMA activity. + */ + dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_82371AB, + PCI_ANY_ID, PCI_ANY_ID, NULL); + if (dev) { + errata.piix4.bmisx = pci_resource_start(dev, 4); + pci_dev_put(dev); + } + + /* + * Type-F DMA + * ---------- + * Find the PIIX4 ISA Controller and read the Motherboard + * DMA controller's status to see if Type-F (Fast) DMA mode + * is enabled (bit 7) on either channel. Note that we'll + * disable C3 support if this is enabled, as some legacy + * devices won't operate well if fast DMA is disabled. + */ + dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_82371AB_0, + PCI_ANY_ID, PCI_ANY_ID, NULL); + if (dev) { + pci_read_config_byte(dev, 0x76, &value1); + pci_read_config_byte(dev, 0x77, &value2); + if ((value1 & 0x80) || (value2 & 0x80)) + errata.piix4.fdma = 1; + pci_dev_put(dev); + } + + break; + } + + if (errata.piix4.bmisx) + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Bus master activity detection (BM-IDE) erratum enabled\n")); + if (errata.piix4.fdma) + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Type-F DMA livelock erratum (C3 disabled)\n")); + + return 0; +} + +static int acpi_processor_errata(struct acpi_processor *pr) +{ + int result = 0; + struct pci_dev *dev = NULL; + + + if (!pr) + return -EINVAL; + + /* + * PIIX4 + */ + dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, + PCI_ANY_ID, NULL); + if (dev) { + result = acpi_processor_errata_piix4(dev); + pci_dev_put(dev); + } + + return result; +} + +/* -------------------------------------------------------------------------- + Initialization + -------------------------------------------------------------------------- */ + +#ifdef CONFIG_ACPI_HOTPLUG_CPU +static int acpi_processor_hotadd_init(struct acpi_processor *pr) +{ + unsigned long long sta; + acpi_status status; + int ret; + + status = acpi_evaluate_integer(pr->handle, "_STA", NULL, &sta); + if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) + return -ENODEV; + + ret = acpi_map_lsapic(pr->handle, &pr->id); + if (ret) + return ret; + + ret = arch_register_cpu(pr->id); + if (ret) { + acpi_unmap_lsapic(pr->id); + return ret; + } + + /* + * CPU got hot-added, but cpu_data is not initialized yet. Set a flag + * to delay cpu_idle/throttling initialization and do it when the CPU + * gets online for the first time. + */ + pr_info("CPU%d has been hot-added\n", pr->id); + pr->flags.need_hotplug_init = 1; + return 0; +} +#else +static inline int acpi_processor_hotadd_init(struct acpi_processor *pr) +{ + return -ENODEV; +} +#endif /* CONFIG_ACPI_HOTPLUG_CPU */ + +static int acpi_processor_get_info(struct acpi_device *device) +{ + union acpi_object object = { 0 }; + struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; + struct acpi_processor *pr = acpi_driver_data(device); + int cpu_index, device_declaration = 0; + acpi_status status = AE_OK; + static int cpu0_initialized; + + if (num_online_cpus() > 1) + errata.smp = TRUE; + + acpi_processor_errata(pr); + + /* + * Check to see if we have bus mastering arbitration control. This + * is required for proper C3 usage (to maintain cache coherency). + */ + if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { + pr->flags.bm_control = 1; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Bus mastering arbitration control present\n")); + } else + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "No bus mastering arbitration control\n")); + + if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { + /* Declared with "Processor" statement; match ProcessorID */ + status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); + if (ACPI_FAILURE(status)) { + dev_err(&device->dev, + "Failed to evaluate processor object (0x%x)\n", + status); + return -ENODEV; + } + + /* + * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. + * >>> 'acpi_get_processor_id(acpi_id, &id)' in + * arch/xxx/acpi.c + */ + pr->acpi_id = object.processor.proc_id; + } else { + /* + * Declared with "Device" statement; match _UID. + * Note that we don't handle string _UIDs yet. + */ + unsigned long long value; + status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, + NULL, &value); + if (ACPI_FAILURE(status)) { + dev_err(&device->dev, + "Failed to evaluate processor _UID (0x%x)\n", + status); + return -ENODEV; + } + device_declaration = 1; + pr->acpi_id = value; + } + cpu_index = acpi_get_cpuid(pr->handle, device_declaration, pr->acpi_id); + + /* Handle UP system running SMP kernel, with no LAPIC in MADT */ + if (!cpu0_initialized && (cpu_index == -1) && + (num_online_cpus() == 1)) { + cpu_index = 0; + } + + cpu0_initialized = 1; + + pr->id = cpu_index; + + /* + * Extra Processor objects may be enumerated on MP systems with + * less than the max # of CPUs. They should be ignored _iff + * they are physically not present. + */ + if (pr->id == -1) { + int ret = acpi_processor_hotadd_init(pr); + if (ret) + return ret; + } + /* + * On some boxes several processors use the same processor bus id. + * But they are located in different scope. For example: + * \_SB.SCK0.CPU0 + * \_SB.SCK1.CPU0 + * Rename the processor device bus id. And the new bus id will be + * generated as the following format: + * CPU+CPU ID. + */ + sprintf(acpi_device_bid(device), "CPU%X", pr->id); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, + pr->acpi_id)); + + if (!object.processor.pblk_address) + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); + else if (object.processor.pblk_length != 6) + dev_err(&device->dev, "Invalid PBLK length [%d]\n", + object.processor.pblk_length); + else { + pr->throttling.address = object.processor.pblk_address; + pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; + pr->throttling.duty_width = acpi_gbl_FADT.duty_width; + + pr->pblk = object.processor.pblk_address; + + /* + * We don't care about error returns - we just try to mark + * these reserved so that nobody else is confused into thinking + * that this region might be unused.. + * + * (In particular, allocating the IO range for Cardbus) + */ + request_region(pr->throttling.address, 6, "ACPI CPU throttle"); + } + + /* + * If ACPI describes a slot number for this CPU, we can use it to + * ensure we get the right value in the "physical id" field + * of /proc/cpuinfo + */ + status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); + if (ACPI_SUCCESS(status)) + arch_fix_phys_package_id(pr->id, object.integer.value); + + return 0; +} + +/* + * Do not put anything in here which needs the core to be online. + * For example MSR access or setting up things which check for cpuinfo_x86 + * (cpu_data(cpu)) values, like CPU feature flags, family, model, etc. + * Such things have to be put in and set up by the processor driver's .probe(). + */ +static DEFINE_PER_CPU(void *, processor_device_array); + +static int __cpuinit acpi_processor_add(struct acpi_device *device, + const struct acpi_device_id *id) +{ + struct acpi_processor *pr; + struct device *dev; + int result = 0; + + pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); + if (!pr) + return -ENOMEM; + + if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { + result = -ENOMEM; + goto err_free_pr; + } + + pr->handle = device->handle; + strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); + strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); + device->driver_data = pr; + + result = acpi_processor_get_info(device); + if (result) /* Processor is not physically present or unavailable */ + return 0; + +#ifdef CONFIG_SMP + if (pr->id >= setup_max_cpus && pr->id != 0) + return 0; +#endif + + BUG_ON(pr->id >= nr_cpu_ids); + + /* + * Buggy BIOS check. + * ACPI id of processors can be reported wrongly by the BIOS. + * Don't trust it blindly + */ + if (per_cpu(processor_device_array, pr->id) != NULL && + per_cpu(processor_device_array, pr->id) != device) { + dev_warn(&device->dev, + "BIOS reported wrong ACPI id %d for the processor\n", + pr->id); + /* Give up, but do not abort the namespace scan. */ + goto err; + } + /* + * processor_device_array is not cleared on errors to allow buggy BIOS + * checks. + */ + per_cpu(processor_device_array, pr->id) = device; + per_cpu(processors, pr->id) = pr; + + dev = get_cpu_device(pr->id); + if (!dev) { + result = -ENODEV; + goto err; + } + + result = acpi_bind_one(dev, pr->handle); + if (result) + goto err; + + pr->dev = dev; + dev->offline = pr->flags.need_hotplug_init; + + /* Trigger the processor driver's .probe() if present. */ + if (device_attach(dev) >= 0) + return 1; + + dev_err(dev, "Processor driver could not be attached\n"); + acpi_unbind_one(dev); + + err: + free_cpumask_var(pr->throttling.shared_cpu_map); + device->driver_data = NULL; + per_cpu(processors, pr->id) = NULL; + err_free_pr: + kfree(pr); + return result; +} + +#ifdef CONFIG_ACPI_HOTPLUG_CPU +/* -------------------------------------------------------------------------- + Removal + -------------------------------------------------------------------------- */ + +static void acpi_processor_remove(struct acpi_device *device) +{ + struct acpi_processor *pr; + + if (!device || !acpi_driver_data(device)) + return; + + pr = acpi_driver_data(device); + if (pr->id >= nr_cpu_ids) + goto out; + + /* + * The only reason why we ever get here is CPU hot-removal. The CPU is + * already offline and the ACPI device removal locking prevents it from + * being put back online at this point. + * + * Unbind the driver from the processor device and detach it from the + * ACPI companion object. + */ + device_release_driver(pr->dev); + acpi_unbind_one(pr->dev); + + /* Clean up. */ + per_cpu(processor_device_array, pr->id) = NULL; + per_cpu(processors, pr->id) = NULL; + try_offline_node(cpu_to_node(pr->id)); + + /* Remove the CPU. */ + get_online_cpus(); + arch_unregister_cpu(pr->id); + acpi_unmap_lsapic(pr->id); + put_online_cpus(); + + out: + free_cpumask_var(pr->throttling.shared_cpu_map); + kfree(pr); +} +#endif /* CONFIG_ACPI_HOTPLUG_CPU */ + +/* + * The following ACPI IDs are known to be suitable for representing as + * processor devices. + */ +static const struct acpi_device_id processor_device_ids[] = { + + { ACPI_PROCESSOR_OBJECT_HID, }, + { ACPI_PROCESSOR_DEVICE_HID, }, + + { } +}; + +static struct acpi_scan_handler __refdata processor_handler = { + .ids = processor_device_ids, + .attach = acpi_processor_add, +#ifdef CONFIG_ACPI_HOTPLUG_CPU + .detach = acpi_processor_remove, +#endif + .hotplug = { + .enabled = true, + }, +}; + +void __init acpi_processor_init(void) +{ + acpi_scan_add_handler_with_hotplug(&processor_handler, "processor"); +} diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c index fefc2ca..33dc6a0 100644 --- a/drivers/acpi/apei/cper.c +++ b/drivers/acpi/apei/cper.c @@ -250,10 +250,6 @@ static const char *cper_pcie_port_type_strs[] = { static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie, const struct acpi_hest_generic_data *gdata) { -#ifdef CONFIG_ACPI_APEI_PCIEAER - struct pci_dev *dev; -#endif - if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE) printk("%s""port_type: %d, %s\n", pfx, pcie->port_type, pcie->port_type < ARRAY_SIZE(cper_pcie_port_type_strs) ? @@ -285,20 +281,6 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie, printk( "%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n", pfx, pcie->bridge.secondary_status, pcie->bridge.control); -#ifdef CONFIG_ACPI_APEI_PCIEAER - dev = pci_get_domain_bus_and_slot(pcie->device_id.segment, - pcie->device_id.bus, pcie->device_id.function); - if (!dev) { - pr_err("PCI AER Cannot get PCI device %04x:%02x:%02x.%d\n", - pcie->device_id.segment, pcie->device_id.bus, - pcie->device_id.slot, pcie->device_id.function); - return; - } - if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) - cper_print_aer(pfx, dev, gdata->error_severity, - (struct aer_capability_regs *) pcie->aer_info); - pci_dev_put(dev); -#endif } static const char *apei_estatus_section_flag_strs[] = { diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index d668a8a..fcd7d91 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -454,7 +454,9 @@ static void ghes_do_proc(struct ghes *ghes, aer_severity = cper_severity_to_aer(sev); aer_recover_queue(pcie_err->device_id.segment, pcie_err->device_id.bus, - devfn, aer_severity); + devfn, aer_severity, + (struct aer_capability_regs *) + pcie_err->aer_info); } } @@ -917,13 +919,14 @@ static int ghes_probe(struct platform_device *ghes_dev) break; case ACPI_HEST_NOTIFY_EXTERNAL: /* External interrupt vector is GSI */ - if (acpi_gsi_to_irq(generic->notify.vector, &ghes->irq)) { + rc = acpi_gsi_to_irq(generic->notify.vector, &ghes->irq); + if (rc) { pr_err(GHES_PFX "Failed to map GSI to IRQ for generic hardware error source: %d\n", generic->header.source_id); goto err_edac_unreg; } - if (request_irq(ghes->irq, ghes_irq_func, - 0, "GHES IRQ", ghes)) { + rc = request_irq(ghes->irq, ghes_irq_func, 0, "GHES IRQ", ghes); + if (rc) { pr_err(GHES_PFX "Failed to register IRQ for generic hardware error source: %d\n", generic->header.source_id); goto err_edac_unreg; diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index bc493aa..31c217a 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -278,16 +278,38 @@ int acpi_bus_init_power(struct acpi_device *device) if (result) return result; } else if (state == ACPI_STATE_UNKNOWN) { - /* No power resources and missing _PSC? Try to force D0. */ + /* + * No power resources and missing _PSC? Cross fingers and make + * it D0 in hope that this is what the BIOS put the device into. + * [We tried to force D0 here by executing _PS0, but that broke + * Toshiba P870-303 in a nasty way.] + */ state = ACPI_STATE_D0; - result = acpi_dev_pm_explicit_set(device, state); - if (result) - return result; } device->power.state = state; return 0; } +/** + * acpi_device_fix_up_power - Force device with missing _PSC into D0. + * @device: Device object whose power state is to be fixed up. + * + * Devices without power resources and _PSC, but having _PS0 and _PS3 defined, + * are assumed to be put into D0 by the BIOS. However, in some cases that may + * not be the case and this function should be used then. + */ +int acpi_device_fix_up_power(struct acpi_device *device) +{ + int ret = 0; + + if (!device->power.flags.power_resources + && !device->power.flags.explicit_get + && device->power.state == ACPI_STATE_D0) + ret = acpi_dev_pm_explicit_set(device, ACPI_STATE_D0); + + return ret; +} + int acpi_bus_update_power(acpi_handle handle, int *state_p) { struct acpi_device *device; diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 4fdea38..14de9f4 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -66,20 +66,21 @@ struct dock_station { spinlock_t dd_lock; struct mutex hp_lock; struct list_head dependent_devices; - struct list_head hotplug_devices; struct list_head sibling; struct platform_device *dock_device; }; static LIST_HEAD(dock_stations); static int dock_station_count; +static DEFINE_MUTEX(hotplug_lock); struct dock_dependent_device { struct list_head list; - struct list_head hotplug_list; acpi_handle handle; - const struct acpi_dock_ops *ops; - void *context; + const struct acpi_dock_ops *hp_ops; + void *hp_context; + unsigned int hp_refcount; + void (*hp_release)(void *); }; #define DOCK_DOCKING 0x00000001 @@ -111,7 +112,6 @@ add_dock_dependent_device(struct dock_station *ds, acpi_handle handle) dd->handle = handle; INIT_LIST_HEAD(&dd->list); - INIT_LIST_HEAD(&dd->hotplug_list); spin_lock(&ds->dd_lock); list_add_tail(&dd->list, &ds->dependent_devices); @@ -121,35 +121,90 @@ add_dock_dependent_device(struct dock_station *ds, acpi_handle handle) } /** - * dock_add_hotplug_device - associate a hotplug handler with the dock station - * @ds: The dock station - * @dd: The dependent device struct - * - * Add the dependent device to the dock's hotplug device list + * dock_init_hotplug - Initialize a hotplug device on a docking station. + * @dd: Dock-dependent device. + * @ops: Dock operations to attach to the dependent device. + * @context: Data to pass to the @ops callbacks and @release. + * @init: Optional initialization routine to run after setting up context. + * @release: Optional release routine to run on removal. */ -static void -dock_add_hotplug_device(struct dock_station *ds, - struct dock_dependent_device *dd) +static int dock_init_hotplug(struct dock_dependent_device *dd, + const struct acpi_dock_ops *ops, void *context, + void (*init)(void *), void (*release)(void *)) { - mutex_lock(&ds->hp_lock); - list_add_tail(&dd->hotplug_list, &ds->hotplug_devices); - mutex_unlock(&ds->hp_lock); + int ret = 0; + + mutex_lock(&hotplug_lock); + + if (dd->hp_context) { + ret = -EEXIST; + } else { + dd->hp_refcount = 1; + dd->hp_ops = ops; + dd->hp_context = context; + dd->hp_release = release; + } + + if (!WARN_ON(ret) && init) + init(context); + + mutex_unlock(&hotplug_lock); + return ret; } /** - * dock_del_hotplug_device - remove a hotplug handler from the dock station - * @ds: The dock station - * @dd: the dependent device struct + * dock_release_hotplug - Decrement hotplug reference counter of dock device. + * @dd: Dock-dependent device. * - * Delete the dependent device from the dock's hotplug device list + * Decrement the reference counter of @dd and if 0, detach its hotplug + * operations from it, reset its context pointer and run the optional release + * routine if present. */ -static void -dock_del_hotplug_device(struct dock_station *ds, - struct dock_dependent_device *dd) +static void dock_release_hotplug(struct dock_dependent_device *dd) { - mutex_lock(&ds->hp_lock); - list_del(&dd->hotplug_list); - mutex_unlock(&ds->hp_lock); + void (*release)(void *) = NULL; + void *context = NULL; + + mutex_lock(&hotplug_lock); + + if (dd->hp_context && !--dd->hp_refcount) { + dd->hp_ops = NULL; + context = dd->hp_context; + dd->hp_context = NULL; + release = dd->hp_release; + dd->hp_release = NULL; + } + + if (release && context) + release(context); + + mutex_unlock(&hotplug_lock); +} + +static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event, + bool uevent) +{ + acpi_notify_handler cb = NULL; + bool run = false; + + mutex_lock(&hotplug_lock); + + if (dd->hp_context) { + run = true; + dd->hp_refcount++; + if (dd->hp_ops) + cb = uevent ? dd->hp_ops->uevent : dd->hp_ops->handler; + } + + mutex_unlock(&hotplug_lock); + + if (!run) + return; + + if (cb) + cb(dd->handle, event, dd->hp_context); + + dock_release_hotplug(dd); } /** @@ -360,9 +415,8 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event) /* * First call driver specific hotplug functions */ - list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) - if (dd->ops && dd->ops->handler) - dd->ops->handler(dd->handle, event, dd->context); + list_for_each_entry(dd, &ds->dependent_devices, list) + dock_hotplug_event(dd, event, false); /* * Now make sure that an acpi_device is created for each @@ -398,9 +452,8 @@ static void dock_event(struct dock_station *ds, u32 event, int num) if (num == DOCK_EVENT) kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); - list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) - if (dd->ops && dd->ops->uevent) - dd->ops->uevent(dd->handle, event, dd->context); + list_for_each_entry(dd, &ds->dependent_devices, list) + dock_hotplug_event(dd, event, true); if (num != DOCK_EVENT) kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); @@ -570,19 +623,24 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier); * @handle: the handle of the device * @ops: handlers to call after docking * @context: device specific data + * @init: Optional initialization routine to run after registration + * @release: Optional release routine to run on unregistration * * If a driver would like to perform a hotplug operation after a dock * event, they can register an acpi_notifiy_handler to be called by * the dock driver after _DCK is executed. */ -int -register_hotplug_dock_device(acpi_handle handle, const struct acpi_dock_ops *ops, - void *context) +int register_hotplug_dock_device(acpi_handle handle, + const struct acpi_dock_ops *ops, void *context, + void (*init)(void *), void (*release)(void *)) { struct dock_dependent_device *dd; struct dock_station *dock_station; int ret = -EINVAL; + if (WARN_ON(!context)) + return -EINVAL; + if (!dock_station_count) return -ENODEV; @@ -597,12 +655,8 @@ register_hotplug_dock_device(acpi_handle handle, const struct acpi_dock_ops *ops * ops */ dd = find_dock_dependent_device(dock_station, handle); - if (dd) { - dd->ops = ops; - dd->context = context; - dock_add_hotplug_device(dock_station, dd); + if (dd && !dock_init_hotplug(dd, ops, context, init, release)) ret = 0; - } } return ret; @@ -624,7 +678,7 @@ void unregister_hotplug_dock_device(acpi_handle handle) list_for_each_entry(dock_station, &dock_stations, sibling) { dd = find_dock_dependent_device(dock_station, handle); if (dd) - dock_del_hotplug_device(dock_station, dd); + dock_release_hotplug(dd); } } EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device); @@ -868,8 +922,10 @@ static ssize_t write_undock(struct device *dev, struct device_attribute *attr, if (!count) return -EINVAL; + acpi_scan_lock_acquire(); begin_undock(dock_station); ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST); + acpi_scan_lock_release(); return ret ? ret: count; } static DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock); @@ -951,7 +1007,6 @@ static int __init dock_add(acpi_handle handle) mutex_init(&dock_station->hp_lock); spin_lock_init(&dock_station->dd_lock); INIT_LIST_HEAD(&dock_station->sibling); - INIT_LIST_HEAD(&dock_station->hotplug_devices); ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list); INIT_LIST_HEAD(&dock_station->dependent_devices); @@ -992,30 +1047,6 @@ err_unregister: } /** - * dock_remove - free up resources related to the dock station - */ -static int dock_remove(struct dock_station *ds) -{ - struct dock_dependent_device *dd, *tmp; - struct platform_device *dock_device = ds->dock_device; - - if (!dock_station_count) - return 0; - - /* remove dependent devices */ - list_for_each_entry_safe(dd, tmp, &ds->dependent_devices, list) - kfree(dd); - - list_del(&ds->sibling); - - /* cleanup sysfs */ - sysfs_remove_group(&dock_device->dev.kobj, &dock_attribute_group); - platform_device_unregister(dock_device); - - return 0; -} - -/** * find_dock_and_bay - look for dock stations and bays * @handle: acpi handle of a device * @lvl: unused @@ -1033,7 +1064,7 @@ find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv) return AE_OK; } -static int __init dock_init(void) +int __init acpi_dock_init(void) { if (acpi_disabled) return 0; @@ -1052,19 +1083,3 @@ static int __init dock_init(void) ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count); return 0; } - -static void __exit dock_exit(void) -{ - struct dock_station *tmp, *dock_station; - - unregister_acpi_bus_notifier(&dock_acpi_notifier); - list_for_each_entry_safe(dock_station, tmp, &dock_stations, sibling) - dock_remove(dock_station); -} - -/* - * Must be called before drivers of devices in dock, otherwise we can't know - * which devices are in a dock - */ -subsys_initcall(dock_init); -module_exit(dock_exit); diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c index 40a84cc..9783f40 100644 --- a/drivers/acpi/glue.c +++ b/drivers/acpi/glue.c @@ -105,7 +105,7 @@ acpi_handle acpi_get_child(acpi_handle parent, u64 address) } EXPORT_SYMBOL(acpi_get_child); -static int acpi_bind_one(struct device *dev, acpi_handle handle) +int acpi_bind_one(struct device *dev, acpi_handle handle) { struct acpi_device *acpi_dev; acpi_status status; @@ -188,8 +188,9 @@ static int acpi_bind_one(struct device *dev, acpi_handle handle) kfree(physical_node); goto err; } +EXPORT_SYMBOL_GPL(acpi_bind_one); -static int acpi_unbind_one(struct device *dev) +int acpi_unbind_one(struct device *dev) { struct acpi_device_physical_node *entry; struct acpi_device *acpi_dev; @@ -238,6 +239,7 @@ err: dev_err(dev, "Oops, 'acpi_handle' corrupt\n"); return -EINVAL; } +EXPORT_SYMBOL_GPL(acpi_unbind_one); static int acpi_platform_notify(struct device *dev) { diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 297cbf4..520073b 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -33,6 +33,7 @@ static inline void acpi_pci_slot_init(void) { } void acpi_pci_root_init(void); void acpi_pci_link_init(void); void acpi_pci_root_hp_init(void); +void acpi_processor_init(void); void acpi_platform_init(void); int acpi_sysfs_init(void); #ifdef CONFIG_ACPI_CONTAINER @@ -40,12 +41,19 @@ void acpi_container_init(void); #else static inline void acpi_container_init(void) {} #endif +#ifdef CONFIG_ACPI_DOCK +void acpi_dock_init(void); +#else +static inline void acpi_dock_init(void) {} +#endif #ifdef CONFIG_ACPI_HOTPLUG_MEMORY void acpi_memory_hotplug_init(void); #else static inline void acpi_memory_hotplug_init(void) {} #endif +extern bool acpi_force_hot_remove; + void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug, const char *name); int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, @@ -76,6 +84,8 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, int type, unsigned long long sta); void acpi_device_add_finalize(struct acpi_device *device); void acpi_free_pnp_ids(struct acpi_device_pnp *pnp); +int acpi_bind_one(struct device *dev, acpi_handle handle); +int acpi_unbind_one(struct device *dev); /* -------------------------------------------------------------------------- Power Resource diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c index f962047..288bb27 100644 --- a/drivers/acpi/power.c +++ b/drivers/acpi/power.c @@ -885,6 +885,7 @@ int acpi_add_power_resource(acpi_handle handle) ACPI_STA_DEFAULT); mutex_init(&resource->resource_lock); INIT_LIST_HEAD(&resource->dependent); + INIT_LIST_HEAD(&resource->list_node); resource->name = device->pnp.bus_id; strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_POWER_CLASS); diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index c266cdc..d93963f 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -1,11 +1,13 @@ /* - * acpi_processor.c - ACPI Processor Driver ($Revision: 71 $) + * processor_driver.c - ACPI Processor Driver * * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de> * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> * - Added processor hotplug support + * Copyright (C) 2013, Intel Corporation + * Rafael J. Wysocki <rafael.j.wysocki@intel.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * @@ -24,52 +26,29 @@ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * TBD: - * 1. Make # power states dynamic. - * 2. Support duty_cycle values that span bit 4. - * 3. Optimize by having scheduler determine business instead of - * having us try to calculate it here. - * 4. Need C1 timing -- must modify kernel (IRQ handler) to get this. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> -#include <linux/types.h> -#include <linux/pci.h> -#include <linux/pm.h> #include <linux/cpufreq.h> #include <linux/cpu.h> -#include <linux/dmi.h> -#include <linux/moduleparam.h> #include <linux/cpuidle.h> #include <linux/slab.h> #include <linux/acpi.h> -#include <linux/memory_hotplug.h> - -#include <asm/io.h> -#include <asm/cpu.h> -#include <asm/delay.h> -#include <asm/uaccess.h> -#include <asm/processor.h> -#include <asm/smp.h> -#include <asm/acpi.h> - -#include <acpi/acpi_bus.h> -#include <acpi/acpi_drivers.h> + #include <acpi/processor.h> +#include "internal.h" + #define PREFIX "ACPI: " -#define ACPI_PROCESSOR_CLASS "processor" -#define ACPI_PROCESSOR_DEVICE_NAME "Processor" #define ACPI_PROCESSOR_FILE_INFO "info" #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" #define ACPI_PROCESSOR_FILE_LIMIT "limit" #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 -#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007" #define ACPI_PROCESSOR_LIMIT_USER 0 #define ACPI_PROCESSOR_LIMIT_THERMAL 1 @@ -81,12 +60,8 @@ MODULE_AUTHOR("Paul Diefenbaugh"); MODULE_DESCRIPTION("ACPI Processor Driver"); MODULE_LICENSE("GPL"); -static int acpi_processor_add(struct acpi_device *device); -static int acpi_processor_remove(struct acpi_device *device); -static void acpi_processor_notify(struct acpi_device *device, u32 event); -static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr); -static int acpi_processor_handle_eject(struct acpi_processor *pr); -static int acpi_processor_start(struct acpi_processor *pr); +static int acpi_processor_start(struct device *dev); +static int acpi_processor_stop(struct device *dev); static const struct acpi_device_id processor_device_ids[] = { {ACPI_PROCESSOR_OBJECT_HID, 0}, @@ -95,295 +70,24 @@ static const struct acpi_device_id processor_device_ids[] = { }; MODULE_DEVICE_TABLE(acpi, processor_device_ids); -static struct acpi_driver acpi_processor_driver = { +static struct device_driver acpi_processor_driver = { .name = "processor", - .class = ACPI_PROCESSOR_CLASS, - .ids = processor_device_ids, - .ops = { - .add = acpi_processor_add, - .remove = acpi_processor_remove, - .notify = acpi_processor_notify, - }, + .bus = &cpu_subsys, + .acpi_match_table = processor_device_ids, + .probe = acpi_processor_start, + .remove = acpi_processor_stop, }; -#define INSTALL_NOTIFY_HANDLER 1 -#define UNINSTALL_NOTIFY_HANDLER 2 - -DEFINE_PER_CPU(struct acpi_processor *, processors); -EXPORT_PER_CPU_SYMBOL(processors); - -struct acpi_processor_errata errata __read_mostly; - -/* -------------------------------------------------------------------------- - Errata Handling - -------------------------------------------------------------------------- */ - -static int acpi_processor_errata_piix4(struct pci_dev *dev) +static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) { - u8 value1 = 0; - u8 value2 = 0; - - - if (!dev) - return -EINVAL; - - /* - * Note that 'dev' references the PIIX4 ACPI Controller. - */ - - switch (dev->revision) { - case 0: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); - break; - case 1: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); - break; - case 2: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); - break; - case 3: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); - break; - default: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); - break; - } - - switch (dev->revision) { - - case 0: /* PIIX4 A-step */ - case 1: /* PIIX4 B-step */ - /* - * See specification changes #13 ("Manual Throttle Duty Cycle") - * and #14 ("Enabling and Disabling Manual Throttle"), plus - * erratum #5 ("STPCLK# Deassertion Time") from the January - * 2002 PIIX4 specification update. Applies to only older - * PIIX4 models. - */ - errata.piix4.throttle = 1; - - case 2: /* PIIX4E */ - case 3: /* PIIX4M */ - /* - * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA - * Livelock") from the January 2002 PIIX4 specification update. - * Applies to all PIIX4 models. - */ - - /* - * BM-IDE - * ------ - * Find the PIIX4 IDE Controller and get the Bus Master IDE - * Status register address. We'll use this later to read - * each IDE controller's DMA status to make sure we catch all - * DMA activity. - */ - dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, - PCI_DEVICE_ID_INTEL_82371AB, - PCI_ANY_ID, PCI_ANY_ID, NULL); - if (dev) { - errata.piix4.bmisx = pci_resource_start(dev, 4); - pci_dev_put(dev); - } - - /* - * Type-F DMA - * ---------- - * Find the PIIX4 ISA Controller and read the Motherboard - * DMA controller's status to see if Type-F (Fast) DMA mode - * is enabled (bit 7) on either channel. Note that we'll - * disable C3 support if this is enabled, as some legacy - * devices won't operate well if fast DMA is disabled. - */ - dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, - PCI_DEVICE_ID_INTEL_82371AB_0, - PCI_ANY_ID, PCI_ANY_ID, NULL); - if (dev) { - pci_read_config_byte(dev, 0x76, &value1); - pci_read_config_byte(dev, 0x77, &value2); - if ((value1 & 0x80) || (value2 & 0x80)) - errata.piix4.fdma = 1; - pci_dev_put(dev); - } - - break; - } - - if (errata.piix4.bmisx) - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Bus master activity detection (BM-IDE) erratum enabled\n")); - if (errata.piix4.fdma) - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Type-F DMA livelock erratum (C3 disabled)\n")); - - return 0; -} - -static int acpi_processor_errata(struct acpi_processor *pr) -{ - int result = 0; - struct pci_dev *dev = NULL; - - - if (!pr) - return -EINVAL; - - /* - * PIIX4 - */ - dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, - PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, - PCI_ANY_ID, NULL); - if (dev) { - result = acpi_processor_errata_piix4(dev); - pci_dev_put(dev); - } - - return result; -} - -/* -------------------------------------------------------------------------- - Driver Interface - -------------------------------------------------------------------------- */ - -static int acpi_processor_get_info(struct acpi_device *device) -{ - acpi_status status = 0; - union acpi_object object = { 0 }; - struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; + struct acpi_device *device = data; struct acpi_processor *pr; - int cpu_index, device_declaration = 0; - static int cpu0_initialized; - - pr = acpi_driver_data(device); - if (!pr) - return -EINVAL; - - if (num_online_cpus() > 1) - errata.smp = TRUE; - - acpi_processor_errata(pr); - - /* - * Check to see if we have bus mastering arbitration control. This - * is required for proper C3 usage (to maintain cache coherency). - */ - if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { - pr->flags.bm_control = 1; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Bus mastering arbitration control present\n")); - } else - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "No bus mastering arbitration control\n")); - - if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { - /* Declared with "Processor" statement; match ProcessorID */ - status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); - if (ACPI_FAILURE(status)) { - dev_err(&device->dev, - "Failed to evaluate processor object (0x%x)\n", - status); - return -ENODEV; - } - - /* - * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. - * >>> 'acpi_get_processor_id(acpi_id, &id)' in - * arch/xxx/acpi.c - */ - pr->acpi_id = object.processor.proc_id; - } else { - /* - * Declared with "Device" statement; match _UID. - * Note that we don't handle string _UIDs yet. - */ - unsigned long long value; - status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, - NULL, &value); - if (ACPI_FAILURE(status)) { - dev_err(&device->dev, - "Failed to evaluate processor _UID (0x%x)\n", - status); - return -ENODEV; - } - device_declaration = 1; - pr->acpi_id = value; - } - cpu_index = acpi_get_cpuid(pr->handle, device_declaration, pr->acpi_id); - - /* Handle UP system running SMP kernel, with no LAPIC in MADT */ - if (!cpu0_initialized && (cpu_index == -1) && - (num_online_cpus() == 1)) { - cpu_index = 0; - } - - cpu0_initialized = 1; - - pr->id = cpu_index; - - /* - * Extra Processor objects may be enumerated on MP systems with - * less than the max # of CPUs. They should be ignored _iff - * they are physically not present. - */ - if (pr->id == -1) { - if (ACPI_FAILURE(acpi_processor_hotadd_init(pr))) - return -ENODEV; - } - /* - * On some boxes several processors use the same processor bus id. - * But they are located in different scope. For example: - * \_SB.SCK0.CPU0 - * \_SB.SCK1.CPU0 - * Rename the processor device bus id. And the new bus id will be - * generated as the following format: - * CPU+CPU ID. - */ - sprintf(acpi_device_bid(device), "CPU%X", pr->id); - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, - pr->acpi_id)); - - if (!object.processor.pblk_address) - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); - else if (object.processor.pblk_length != 6) - dev_err(&device->dev, "Invalid PBLK length [%d]\n", - object.processor.pblk_length); - else { - pr->throttling.address = object.processor.pblk_address; - pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; - pr->throttling.duty_width = acpi_gbl_FADT.duty_width; - - pr->pblk = object.processor.pblk_address; - - /* - * We don't care about error returns - we just try to mark - * these reserved so that nobody else is confused into thinking - * that this region might be unused.. - * - * (In particular, allocating the IO range for Cardbus) - */ - request_region(pr->throttling.address, 6, "ACPI CPU throttle"); - } - - /* - * If ACPI describes a slot number for this CPU, we can use it - * ensure we get the right value in the "physical id" field - * of /proc/cpuinfo - */ - status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); - if (ACPI_SUCCESS(status)) - arch_fix_phys_package_id(pr->id, object.integer.value); - - return 0; -} - -static DEFINE_PER_CPU(void *, processor_device_array); - -static void acpi_processor_notify(struct acpi_device *device, u32 event) -{ - struct acpi_processor *pr = acpi_driver_data(device); int saved; + if (device->handle != handle) + return; + + pr = acpi_driver_data(device); if (!pr) return; @@ -420,55 +124,62 @@ static void acpi_processor_notify(struct acpi_device *device, u32 event) return; } -static int acpi_cpu_soft_notify(struct notifier_block *nfb, - unsigned long action, void *hcpu) +static __cpuinit int __acpi_processor_start(struct acpi_device *device); + +static int __cpuinit acpi_cpu_soft_notify(struct notifier_block *nfb, + unsigned long action, void *hcpu) { unsigned int cpu = (unsigned long)hcpu; struct acpi_processor *pr = per_cpu(processors, cpu); + struct acpi_device *device; + + if (!pr || acpi_bus_get_device(pr->handle, &device)) + return NOTIFY_DONE; - if (action == CPU_ONLINE && pr) { - /* CPU got physically hotplugged and onlined the first time: - * Initialize missing things + if (action == CPU_ONLINE) { + /* + * CPU got physically hotplugged and onlined for the first time: + * Initialize missing things. */ if (pr->flags.need_hotplug_init) { + int ret; + pr_info("Will online and init hotplugged CPU: %d\n", pr->id); - WARN(acpi_processor_start(pr), "Failed to start CPU:" - " %d\n", pr->id); pr->flags.need_hotplug_init = 0; - /* Normal CPU soft online event */ + ret = __acpi_processor_start(device); + WARN(ret, "Failed to start CPU: %d\n", pr->id); } else { + /* Normal CPU soft online event. */ acpi_processor_ppc_has_changed(pr, 0); acpi_processor_hotplug(pr); acpi_processor_reevaluate_tstate(pr, action); acpi_processor_tstate_has_changed(pr); } - } - if (action == CPU_DEAD && pr) { - /* invalidate the flag.throttling after one CPU is offline */ + } else if (action == CPU_DEAD) { + /* Invalidate flag.throttling after the CPU is offline. */ acpi_processor_reevaluate_tstate(pr, action); } return NOTIFY_OK; } -static struct notifier_block acpi_cpu_notifier = +static struct notifier_block __refdata acpi_cpu_notifier = { .notifier_call = acpi_cpu_soft_notify, }; -/* - * acpi_processor_start() is called by the cpu_hotplug_notifier func: - * acpi_cpu_soft_notify(). Getting it __cpuinit{data} is difficult, the - * root cause seem to be that acpi_processor_uninstall_hotplug_notify() - * is in the module_exit (__exit) func. Allowing acpi_processor_start() - * to not be in __cpuinit section, but being called from __cpuinit funcs - * via __ref looks like the right thing to do here. - */ -static __ref int acpi_processor_start(struct acpi_processor *pr) +static __cpuinit int __acpi_processor_start(struct acpi_device *device) { - struct acpi_device *device = per_cpu(processor_device_array, pr->id); + struct acpi_processor *pr = acpi_driver_data(device); + acpi_status status; int result = 0; + if (!pr) + return -ENODEV; + + if (pr->flags.need_hotplug_init) + return 0; + #ifdef CONFIG_CPU_FREQ acpi_processor_ppc_has_changed(pr, 0); acpi_processor_load_module(pr); @@ -506,462 +217,95 @@ static __ref int acpi_processor_start(struct acpi_processor *pr) goto err_remove_sysfs_thermal; } - return 0; + status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, + acpi_processor_notify, device); + if (ACPI_SUCCESS(status)) + return 0; -err_remove_sysfs_thermal: + sysfs_remove_link(&pr->cdev->device.kobj, "device"); + err_remove_sysfs_thermal: sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); -err_thermal_unregister: + err_thermal_unregister: thermal_cooling_device_unregister(pr->cdev); -err_power_exit: + err_power_exit: acpi_processor_power_exit(pr); - return result; } -/* - * Do not put anything in here which needs the core to be online. - * For example MSR access or setting up things which check for cpuinfo_x86 - * (cpu_data(cpu)) values, like CPU feature flags, family, model, etc. - * Such things have to be put in and set up above in acpi_processor_start() - */ -static int __cpuinit acpi_processor_add(struct acpi_device *device) +static int __cpuinit acpi_processor_start(struct device *dev) { - struct acpi_processor *pr = NULL; - int result = 0; - struct device *dev; - - pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); - if (!pr) - return -ENOMEM; - - if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { - result = -ENOMEM; - goto err_free_pr; - } - - pr->handle = device->handle; - strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); - strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); - device->driver_data = pr; - - result = acpi_processor_get_info(device); - if (result) { - /* Processor is physically not present */ - return 0; - } - -#ifdef CONFIG_SMP - if (pr->id >= setup_max_cpus && pr->id != 0) - return 0; -#endif - - BUG_ON(pr->id >= nr_cpu_ids); - - /* - * Buggy BIOS check - * ACPI id of processors can be reported wrongly by the BIOS. - * Don't trust it blindly - */ - if (per_cpu(processor_device_array, pr->id) != NULL && - per_cpu(processor_device_array, pr->id) != device) { - dev_warn(&device->dev, - "BIOS reported wrong ACPI id %d for the processor\n", - pr->id); - result = -ENODEV; - goto err_free_cpumask; - } - per_cpu(processor_device_array, pr->id) = device; - - per_cpu(processors, pr->id) = pr; - - dev = get_cpu_device(pr->id); - if (sysfs_create_link(&device->dev.kobj, &dev->kobj, "sysdev")) { - result = -EFAULT; - goto err_clear_processor; - } + struct acpi_device *device; - /* - * Do not start hotplugged CPUs now, but when they - * are onlined the first time - */ - if (pr->flags.need_hotplug_init) - return 0; - - result = acpi_processor_start(pr); - if (result) - goto err_remove_sysfs; - - return 0; + if (acpi_bus_get_device(ACPI_HANDLE(dev), &device)) + return -ENODEV; -err_remove_sysfs: - sysfs_remove_link(&device->dev.kobj, "sysdev"); -err_clear_processor: - /* - * processor_device_array is not cleared to allow checks for buggy BIOS - */ - per_cpu(processors, pr->id) = NULL; -err_free_cpumask: - free_cpumask_var(pr->throttling.shared_cpu_map); -err_free_pr: - kfree(pr); - return result; + return __acpi_processor_start(device); } -static int acpi_processor_remove(struct acpi_device *device) +static int acpi_processor_stop(struct device *dev) { - struct acpi_processor *pr = NULL; + struct acpi_device *device; + struct acpi_processor *pr; + if (acpi_bus_get_device(ACPI_HANDLE(dev), &device)) + return 0; - if (!device || !acpi_driver_data(device)) - return -EINVAL; + acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, + acpi_processor_notify); pr = acpi_driver_data(device); - - if (pr->id >= nr_cpu_ids) - goto free; - - if (device->removal_type == ACPI_BUS_REMOVAL_EJECT) { - if (acpi_processor_handle_eject(pr)) - return -EINVAL; - } + if (!pr) + return 0; acpi_processor_power_exit(pr); - sysfs_remove_link(&device->dev.kobj, "sysdev"); - if (pr->cdev) { sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); sysfs_remove_link(&pr->cdev->device.kobj, "device"); thermal_cooling_device_unregister(pr->cdev); pr->cdev = NULL; } - - per_cpu(processors, pr->id) = NULL; - per_cpu(processor_device_array, pr->id) = NULL; - try_offline_node(cpu_to_node(pr->id)); - -free: - free_cpumask_var(pr->throttling.shared_cpu_map); - kfree(pr); - return 0; } -#ifdef CONFIG_ACPI_HOTPLUG_CPU -/**************************************************************************** - * Acpi processor hotplug support * - ****************************************************************************/ - -static int is_processor_present(acpi_handle handle) -{ - acpi_status status; - unsigned long long sta = 0; - - - status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); - - if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) - return 1; - - /* - * _STA is mandatory for a processor that supports hot plug - */ - if (status == AE_NOT_FOUND) - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Processor does not support hot plug\n")); - else - ACPI_EXCEPTION((AE_INFO, status, - "Processor Device is not present")); - return 0; -} - -static void acpi_processor_hotplug_notify(acpi_handle handle, - u32 event, void *data) -{ - struct acpi_device *device = NULL; - struct acpi_eject_event *ej_event = NULL; - u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ - acpi_status status; - int result; - - acpi_scan_lock_acquire(); - - switch (event) { - case ACPI_NOTIFY_BUS_CHECK: - case ACPI_NOTIFY_DEVICE_CHECK: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Processor driver received %s event\n", - (event == ACPI_NOTIFY_BUS_CHECK) ? - "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); - - if (!is_processor_present(handle)) - break; - - if (!acpi_bus_get_device(handle, &device)) - break; - - result = acpi_bus_scan(handle); - if (result) { - acpi_handle_err(handle, "Unable to add the device\n"); - break; - } - result = acpi_bus_get_device(handle, &device); - if (result) { - acpi_handle_err(handle, "Missing device object\n"); - break; - } - ost_code = ACPI_OST_SC_SUCCESS; - break; - - case ACPI_NOTIFY_EJECT_REQUEST: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "received ACPI_NOTIFY_EJECT_REQUEST\n")); - - if (acpi_bus_get_device(handle, &device)) { - acpi_handle_err(handle, - "Device don't exist, dropping EJECT\n"); - break; - } - if (!acpi_driver_data(device)) { - acpi_handle_err(handle, - "Driver data is NULL, dropping EJECT\n"); - break; - } - - ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); - if (!ej_event) { - acpi_handle_err(handle, "No memory, dropping EJECT\n"); - break; - } - - get_device(&device->dev); - ej_event->device = device; - ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; - /* The eject is carried out asynchronously. */ - status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, - ej_event); - if (ACPI_FAILURE(status)) { - put_device(&device->dev); - kfree(ej_event); - break; - } - goto out; - - default: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Unsupported event [0x%x]\n", event)); - - /* non-hotplug event; possibly handled by other handler */ - goto out; - } - - /* Inform firmware that the hotplug operation has completed */ - (void) acpi_evaluate_hotplug_ost(handle, event, ost_code, NULL); - - out: - acpi_scan_lock_release(); -} - -static acpi_status is_processor_device(acpi_handle handle) -{ - struct acpi_device_info *info; - char *hid; - acpi_status status; - - status = acpi_get_object_info(handle, &info); - if (ACPI_FAILURE(status)) - return status; - - if (info->type == ACPI_TYPE_PROCESSOR) { - kfree(info); - return AE_OK; /* found a processor object */ - } - - if (!(info->valid & ACPI_VALID_HID)) { - kfree(info); - return AE_ERROR; - } - - hid = info->hardware_id.string; - if ((hid == NULL) || strcmp(hid, ACPI_PROCESSOR_DEVICE_HID)) { - kfree(info); - return AE_ERROR; - } - - kfree(info); - return AE_OK; /* found a processor device object */ -} - -static acpi_status -processor_walk_namespace_cb(acpi_handle handle, - u32 lvl, void *context, void **rv) -{ - acpi_status status; - int *action = context; - - status = is_processor_device(handle); - if (ACPI_FAILURE(status)) - return AE_OK; /* not a processor; continue to walk */ - - switch (*action) { - case INSTALL_NOTIFY_HANDLER: - acpi_install_notify_handler(handle, - ACPI_SYSTEM_NOTIFY, - acpi_processor_hotplug_notify, - NULL); - break; - case UNINSTALL_NOTIFY_HANDLER: - acpi_remove_notify_handler(handle, - ACPI_SYSTEM_NOTIFY, - acpi_processor_hotplug_notify); - break; - default: - break; - } - - /* found a processor; skip walking underneath */ - return AE_CTRL_DEPTH; -} - -static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr) -{ - acpi_handle handle = pr->handle; - - if (!is_processor_present(handle)) { - return AE_ERROR; - } - - if (acpi_map_lsapic(handle, &pr->id)) - return AE_ERROR; - - if (arch_register_cpu(pr->id)) { - acpi_unmap_lsapic(pr->id); - return AE_ERROR; - } - - /* CPU got hot-plugged, but cpu_data is not initialized yet - * Set flag to delay cpu_idle/throttling initialization - * in: - * acpi_processor_add() - * acpi_processor_get_info() - * and do it when the CPU gets online the first time - * TBD: Cleanup above functions and try to do this more elegant. - */ - pr_info("CPU %d got hotplugged\n", pr->id); - pr->flags.need_hotplug_init = 1; - - return AE_OK; -} - -static int acpi_processor_handle_eject(struct acpi_processor *pr) -{ - if (cpu_online(pr->id)) - cpu_down(pr->id); - - get_online_cpus(); - /* - * The cpu might become online again at this point. So we check whether - * the cpu has been onlined or not. If the cpu became online, it means - * that someone wants to use the cpu. So acpi_processor_handle_eject() - * returns -EAGAIN. - */ - if (unlikely(cpu_online(pr->id))) { - put_online_cpus(); - pr_warn("Failed to remove CPU %d, because other task " - "brought the CPU back online\n", pr->id); - return -EAGAIN; - } - arch_unregister_cpu(pr->id); - acpi_unmap_lsapic(pr->id); - put_online_cpus(); - return (0); -} -#else -static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr) -{ - return AE_ERROR; -} -static int acpi_processor_handle_eject(struct acpi_processor *pr) -{ - return (-EINVAL); -} -#endif - -static -void acpi_processor_install_hotplug_notify(void) -{ -#ifdef CONFIG_ACPI_HOTPLUG_CPU - int action = INSTALL_NOTIFY_HANDLER; - acpi_walk_namespace(ACPI_TYPE_ANY, - ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, - processor_walk_namespace_cb, NULL, &action, NULL); -#endif - register_hotcpu_notifier(&acpi_cpu_notifier); -} - -static -void acpi_processor_uninstall_hotplug_notify(void) -{ -#ifdef CONFIG_ACPI_HOTPLUG_CPU - int action = UNINSTALL_NOTIFY_HANDLER; - acpi_walk_namespace(ACPI_TYPE_ANY, - ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, - processor_walk_namespace_cb, NULL, &action, NULL); -#endif - unregister_hotcpu_notifier(&acpi_cpu_notifier); -} - /* * We keep the driver loaded even when ACPI is not running. * This is needed for the powernow-k8 driver, that works even without * ACPI, but needs symbols from this driver */ -static int __init acpi_processor_init(void) +static int __init acpi_processor_driver_init(void) { int result = 0; if (acpi_disabled) return 0; - result = acpi_bus_register_driver(&acpi_processor_driver); + result = driver_register(&acpi_processor_driver); if (result < 0) return result; acpi_processor_syscore_init(); - - acpi_processor_install_hotplug_notify(); - + register_hotcpu_notifier(&acpi_cpu_notifier); acpi_thermal_cpufreq_init(); - acpi_processor_ppc_init(); - acpi_processor_throttling_init(); - return 0; } -static void __exit acpi_processor_exit(void) +static void __exit acpi_processor_driver_exit(void) { if (acpi_disabled) return; acpi_processor_ppc_exit(); - acpi_thermal_cpufreq_exit(); - - acpi_processor_uninstall_hotplug_notify(); - + unregister_hotcpu_notifier(&acpi_cpu_notifier); acpi_processor_syscore_exit(); - - acpi_bus_unregister_driver(&acpi_processor_driver); - - return; + driver_unregister(&acpi_processor_driver); } -module_init(acpi_processor_init); -module_exit(acpi_processor_exit); +module_init(acpi_processor_driver_init); +module_exit(acpi_processor_driver_exit); MODULE_ALIAS("processor"); diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c index a3868f6..3322b47 100644 --- a/drivers/acpi/resource.c +++ b/drivers/acpi/resource.c @@ -304,7 +304,8 @@ static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi) } static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, - u8 triggering, u8 polarity, u8 shareable) + u8 triggering, u8 polarity, u8 shareable, + bool legacy) { int irq, p, t; @@ -317,14 +318,19 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, * In IO-APIC mode, use overrided 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 (!acpi_get_override_irq(gsi, &t, &p)) { + if (legacy && !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_warning("ACPI: IRQ %d override to %s, %s\n", gsi, - t ? "edge" : "level", p ? "low" : "high"); + t ? "level" : "edge", p ? "low" : "high"); triggering = trig; polarity = pol; } @@ -373,7 +379,7 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, } acpi_dev_get_irqresource(res, irq->interrupts[index], irq->triggering, irq->polarity, - irq->sharable); + irq->sharable, true); break; case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: ext_irq = &ares->data.extended_irq; @@ -383,7 +389,7 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, } acpi_dev_get_irqresource(res, ext_irq->interrupts[index], ext_irq->triggering, ext_irq->polarity, - ext_irq->sharable); + ext_irq->sharable, false); break; default: return false; diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 44225cb..db118b1 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -27,6 +27,12 @@ extern struct acpi_device *acpi_root; #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) +/* + * If set, devices will be hot-removed even if they cannot be put offline + * gracefully (from the kernel's standpoint). + */ +bool acpi_force_hot_remove; + static const char *dummy_hid = "device"; static LIST_HEAD(acpi_device_list); @@ -120,12 +126,78 @@ acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, cha } static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); +static acpi_status acpi_bus_offline_companions(acpi_handle handle, u32 lvl, + void *data, void **ret_p) +{ + struct acpi_device *device = NULL; + struct acpi_device_physical_node *pn; + bool second_pass = (bool)data; + acpi_status status = AE_OK; + + if (acpi_bus_get_device(handle, &device)) + return AE_OK; + + mutex_lock(&device->physical_node_lock); + + list_for_each_entry(pn, &device->physical_node_list, node) { + int ret; + + if (second_pass) { + /* Skip devices offlined by the first pass. */ + if (pn->put_online) + continue; + } else { + pn->put_online = false; + } + ret = device_offline(pn->dev); + if (acpi_force_hot_remove) + continue; + + if (ret >= 0) { + pn->put_online = !ret; + } else { + *ret_p = pn->dev; + if (second_pass) { + status = AE_ERROR; + break; + } + } + } + + mutex_unlock(&device->physical_node_lock); + + return status; +} + +static acpi_status acpi_bus_online_companions(acpi_handle handle, u32 lvl, + void *data, void **ret_p) +{ + struct acpi_device *device = NULL; + struct acpi_device_physical_node *pn; + + if (acpi_bus_get_device(handle, &device)) + return AE_OK; + + mutex_lock(&device->physical_node_lock); + + list_for_each_entry(pn, &device->physical_node_list, node) + if (pn->put_online) { + device_online(pn->dev); + pn->put_online = false; + } + + mutex_unlock(&device->physical_node_lock); + + return AE_OK; +} + static int acpi_scan_hot_remove(struct acpi_device *device) { acpi_handle handle = device->handle; acpi_handle not_used; struct acpi_object_list arg_list; union acpi_object arg; + struct device *errdev; acpi_status status; unsigned long long sta; @@ -136,10 +208,53 @@ static int acpi_scan_hot_remove(struct acpi_device *device) return -EINVAL; } + lock_device_hotplug(); + + /* + * Carry out two passes here and ignore errors in the first pass, + * because if the devices in question are memory blocks and + * CONFIG_MEMCG is set, one of the blocks may hold data structures + * that the other blocks depend on, but it is not known in advance which + * block holds them. + * + * If the first pass is successful, the second one isn't needed, though. + */ + errdev = NULL; + acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, + NULL, acpi_bus_offline_companions, + (void *)false, (void **)&errdev); + acpi_bus_offline_companions(handle, 0, (void *)false, (void **)&errdev); + if (errdev) { + errdev = NULL; + acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, + NULL, acpi_bus_offline_companions, + (void *)true , (void **)&errdev); + if (!errdev || acpi_force_hot_remove) + acpi_bus_offline_companions(handle, 0, (void *)true, + (void **)&errdev); + + if (errdev && !acpi_force_hot_remove) { + dev_warn(errdev, "Offline failed.\n"); + acpi_bus_online_companions(handle, 0, NULL, NULL); + acpi_walk_namespace(ACPI_TYPE_ANY, handle, + ACPI_UINT32_MAX, + acpi_bus_online_companions, NULL, + NULL, NULL); + + unlock_device_hotplug(); + + put_device(&device->dev); + return -EBUSY; + } + } + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Hot-removing device %s...\n", dev_name(&device->dev))); acpi_bus_trim(device); + + unlock_device_hotplug(); + /* Device node has been unregistered. */ put_device(&device->dev); device = NULL; @@ -236,6 +351,7 @@ static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source) int error; mutex_lock(&acpi_scan_lock); + lock_device_hotplug(); acpi_bus_get_device(handle, &device); if (device) { @@ -259,6 +375,7 @@ static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source) kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); out: + unlock_device_hotplug(); acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); mutex_unlock(&acpi_scan_lock); } @@ -952,7 +1069,6 @@ int acpi_device_add(struct acpi_device *device, printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", dev_name(&device->dev)); - device->removal_type = ACPI_BUS_REMOVAL_NORMAL; return 0; err: @@ -1017,11 +1133,8 @@ acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) return -ENOSYS; result = driver->ops.add(device); - if (result) { - device->driver = NULL; - device->driver_data = NULL; + if (result) return result; - } device->driver = driver; @@ -1942,7 +2055,6 @@ static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, if (!acpi_bus_get_device(handle, &device)) { struct acpi_scan_handler *dev_handler = device->handler; - device->removal_type = ACPI_BUS_REMOVAL_EJECT; if (dev_handler) { if (dev_handler->detach) dev_handler->detach(device); @@ -2041,10 +2153,12 @@ int __init acpi_scan_init(void) acpi_pci_root_init(); acpi_pci_link_init(); + acpi_processor_init(); acpi_platform_init(); acpi_lpss_init(); acpi_container_init(); acpi_memory_hotplug_init(); + acpi_dock_init(); mutex_lock(&acpi_scan_lock); /* diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c index fcae5fa..5c5d162 100644 --- a/drivers/acpi/sysfs.c +++ b/drivers/acpi/sysfs.c @@ -780,6 +780,33 @@ void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug, pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name); } +static ssize_t force_remove_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", !!acpi_force_hot_remove); +} + +static ssize_t force_remove_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t size) +{ + bool val; + int ret; + + ret = strtobool(buf, &val); + if (ret < 0) + return ret; + + lock_device_hotplug(); + acpi_force_hot_remove = val; + unlock_device_hotplug(); + return size; +} + +static const struct kobj_attribute force_remove_attr = + __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show, + force_remove_store); + int __init acpi_sysfs_init(void) { int result; @@ -789,6 +816,10 @@ int __init acpi_sysfs_init(void) return result; hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj); + result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr); + if (result) + return result; + result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr); return result; } diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 5b32e15..440eadf 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -458,12 +458,28 @@ static struct dmi_system_id video_dmi_table[] __initdata = { }, { .callback = video_ignore_initial_backlight, + .ident = "HP Pavilion g6 Notebook PC", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), + }, + }, + { + .callback = video_ignore_initial_backlight, .ident = "HP 1000 Notebook PC", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"), }, }, + { + .callback = video_ignore_initial_backlight, + .ident = "HP Pavilion m4", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"), + }, + }, {} }; @@ -1706,6 +1722,9 @@ static int acpi_video_bus_add(struct acpi_device *device) int error; acpi_status status; + if (device->handler) + return -EINVAL; + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, device->parent->handle, 1, acpi_video_bus_match, NULL, |