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drivers/acpi/processor_core.c
24.8 KB
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/* * acpi_processor.c - ACPI Processor Driver ($Revision: 71 $) * * 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 * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 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/proc_fs.h> #include <linux/seq_file.h> #include <linux/dmi.h> #include <linux/moduleparam.h> #include <asm/io.h> #include <asm/system.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> |
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#define ACPI_PROCESSOR_COMPONENT 0x01000000 #define ACPI_PROCESSOR_CLASS "processor" #define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver" #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_LIMIT_USER 0 #define ACPI_PROCESSOR_LIMIT_THERMAL 1 #define ACPI_STA_PRESENT 0x00000001 #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
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ACPI_MODULE_NAME("acpi_processor") |
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|
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MODULE_AUTHOR("Paul Diefenbaugh"); |
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MODULE_DESCRIPTION(ACPI_PROCESSOR_DRIVER_NAME); MODULE_LICENSE("GPL"); |
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static int acpi_processor_add(struct acpi_device *device); static int acpi_processor_start(struct acpi_device *device); static int acpi_processor_remove(struct acpi_device *device, int type); |
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static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
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static void acpi_processor_notify(acpi_handle handle, u32 event, void *data); |
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static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); static int acpi_processor_handle_eject(struct acpi_processor *pr); static struct acpi_driver acpi_processor_driver = { |
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.name = ACPI_PROCESSOR_DRIVER_NAME, .class = ACPI_PROCESSOR_CLASS, .ids = ACPI_PROCESSOR_HID, .ops = { .add = acpi_processor_add, .remove = acpi_processor_remove, .start = acpi_processor_start, }, |
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}; #define INSTALL_NOTIFY_HANDLER 1 #define UNINSTALL_NOTIFY_HANDLER 2 |
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static struct file_operations acpi_processor_info_fops = { |
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.open = acpi_processor_info_open_fs, .read = seq_read, .llseek = seq_lseek, .release = single_release, |
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}; |
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struct acpi_processor *processors[NR_CPUS]; |
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struct acpi_processor_errata errata; |
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/* -------------------------------------------------------------------------- Errata Handling -------------------------------------------------------------------------- */ |
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static int acpi_processor_errata_piix4(struct pci_dev *dev) |
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{ |
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u8 rev = 0; u8 value1 = 0; u8 value2 = 0; |
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ACPI_FUNCTION_TRACE("acpi_processor_errata_piix4"); if (!dev) return_VALUE(-EINVAL); /* * Note that 'dev' references the PIIX4 ACPI Controller. */ pci_read_config_byte(dev, PCI_REVISION_ID, &rev); switch (rev) { case 0: ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step ")); break; case 1: ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step ")); break; case 2: ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E ")); break; case 3: ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M ")); break; default: ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4 ")); break; } switch (rev) { 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, |
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PCI_DEVICE_ID_INTEL_82371AB, PCI_ANY_ID, PCI_ANY_ID, NULL); |
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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, |
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PCI_DEVICE_ID_INTEL_82371AB_0, PCI_ANY_ID, PCI_ANY_ID, NULL); |
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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, |
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"Bus master activity detection (BM-IDE) erratum enabled ")); |
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if (errata.piix4.fdma) ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
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"Type-F DMA livelock erratum (C3 disabled) ")); |
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return_VALUE(0); } |
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static int acpi_processor_errata(struct acpi_processor *pr) |
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{ |
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int result = 0; struct pci_dev *dev = NULL; |
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ACPI_FUNCTION_TRACE("acpi_processor_errata"); if (!pr) return_VALUE(-EINVAL); /* * PIIX4 */ dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
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PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, PCI_ANY_ID, NULL); |
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if (dev) { result = acpi_processor_errata_piix4(dev); pci_dev_put(dev); } return_VALUE(result); } |
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/* -------------------------------------------------------------------------- |
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Common ACPI processor fucntions -------------------------------------------------------------------------- */ /* * _PDC is required for a BIOS-OS handshake for most of the newer * ACPI processor features. */ int acpi_processor_set_pdc(struct acpi_processor *pr, |
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struct acpi_object_list *pdc_in) |
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{ |
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acpi_status status = AE_OK; u32 arg0_buf[3]; union acpi_object arg0 = { ACPI_TYPE_BUFFER }; struct acpi_object_list no_object = { 1, &arg0 }; struct acpi_object_list *pdc; |
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ACPI_FUNCTION_TRACE("acpi_processor_set_pdc"); arg0.buffer.length = 12; arg0.buffer.pointer = (u8 *) arg0_buf; arg0_buf[0] = ACPI_PDC_REVISION_ID; arg0_buf[1] = 0; arg0_buf[2] = 0; pdc = (pdc_in) ? pdc_in : &no_object; status = acpi_evaluate_object(pr->handle, "_PDC", pdc, NULL); if ((ACPI_FAILURE(status)) && (pdc_in)) |
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Error evaluating _PDC, using legacy perf. control... ")); |
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return_VALUE(status); } |
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/* -------------------------------------------------------------------------- |
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FS Interface (/proc) -------------------------------------------------------------------------- */ |
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static struct proc_dir_entry *acpi_processor_dir = NULL; |
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static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) { |
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struct acpi_processor *pr = (struct acpi_processor *)seq->private; |
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ACPI_FUNCTION_TRACE("acpi_processor_info_seq_show"); if (!pr) goto end; seq_printf(seq, "processor id: %d " |
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"acpi id: %d " "bus mastering control: %s " "power management: %s " "throttling control: %s " "limit interface: %s ", pr->id, pr->acpi_id, pr->flags.bm_control ? "yes" : "no", pr->flags.power ? "yes" : "no", pr->flags.throttling ? "yes" : "no", pr->flags.limit ? "yes" : "no"); end: |
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return_VALUE(0); } static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) { return single_open(file, acpi_processor_info_seq_show, |
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PDE(inode)->data); |
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} |
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static int acpi_processor_add_fs(struct acpi_device *device) |
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{ |
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struct proc_dir_entry *entry = NULL; |
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ACPI_FUNCTION_TRACE("acpi_processor_add_fs"); if (!acpi_device_dir(device)) { acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
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acpi_processor_dir); |
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if (!acpi_device_dir(device)) return_VALUE(-ENODEV); } acpi_device_dir(device)->owner = THIS_MODULE; /* 'info' [R] */ entry = create_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
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S_IRUGO, acpi_device_dir(device)); |
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if (!entry) ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
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"Unable to create '%s' fs entry ", ACPI_PROCESSOR_FILE_INFO)); |
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else { entry->proc_fops = &acpi_processor_info_fops; entry->data = acpi_driver_data(device); entry->owner = THIS_MODULE; } /* 'throttling' [R/W] */ entry = create_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
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S_IFREG | S_IRUGO | S_IWUSR, acpi_device_dir(device)); |
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if (!entry) ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
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"Unable to create '%s' fs entry ", ACPI_PROCESSOR_FILE_THROTTLING)); |
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else { entry->proc_fops = &acpi_processor_throttling_fops; entry->proc_fops->write = acpi_processor_write_throttling; entry->data = acpi_driver_data(device); entry->owner = THIS_MODULE; } /* 'limit' [R/W] */ entry = create_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, |
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S_IFREG | S_IRUGO | S_IWUSR, acpi_device_dir(device)); |
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if (!entry) ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
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"Unable to create '%s' fs entry ", ACPI_PROCESSOR_FILE_LIMIT)); |
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else { entry->proc_fops = &acpi_processor_limit_fops; entry->proc_fops->write = acpi_processor_write_limit; entry->data = acpi_driver_data(device); entry->owner = THIS_MODULE; } return_VALUE(0); } |
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static int acpi_processor_remove_fs(struct acpi_device *device) |
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{ ACPI_FUNCTION_TRACE("acpi_processor_remove_fs"); if (acpi_device_dir(device)) { |
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remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, acpi_device_dir(device)); |
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remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
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acpi_device_dir(device)); remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, acpi_device_dir(device)); |
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remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); acpi_device_dir(device) = NULL; } return_VALUE(0); } /* Use the acpiid in MADT to map cpus in case of SMP */ #ifndef CONFIG_SMP |
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#define convert_acpiid_to_cpu(acpi_id) (0xff) |
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#else #ifdef CONFIG_IA64 #define arch_acpiid_to_apicid ia64_acpiid_to_sapicid #define arch_cpu_to_apicid ia64_cpu_to_sapicid #define ARCH_BAD_APICID (0xffff) #else #define arch_acpiid_to_apicid x86_acpiid_to_apicid #define arch_cpu_to_apicid x86_cpu_to_apicid #define ARCH_BAD_APICID (0xff) #endif |
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static u8 convert_acpiid_to_cpu(u8 acpi_id) |
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{ u16 apic_id; |
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int i; |
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apic_id = arch_acpiid_to_apicid[acpi_id]; if (apic_id == ARCH_BAD_APICID) return -1; for (i = 0; i < NR_CPUS; i++) { |
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if (arch_cpu_to_apicid[i] == apic_id) return i; |
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} return -1; } #endif /* -------------------------------------------------------------------------- Driver Interface -------------------------------------------------------------------------- */ |
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static int acpi_processor_get_info(struct acpi_processor *pr) |
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{ |
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acpi_status status = 0; union acpi_object object = { 0 }; struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; |
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u8 cpu_index; |
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static int cpu0_initialized; |
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ACPI_FUNCTION_TRACE("acpi_processor_get_info"); if (!pr) return_VALUE(-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_fadt.V1_pm2_cnt_blk && acpi_fadt.pm2_cnt_len) { pr->flags.bm_control = 1; ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
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"Bus mastering arbitration control present ")); } else |
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
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"No bus mastering arbitration control ")); |
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/* * Evalute the processor object. Note that it is common on SMP to * have the first (boot) processor with a valid PBLK address while * all others have a NULL address. */ status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
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"Error evaluating processor object ")); |
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return_VALUE(-ENODEV); } /* * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. |
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* >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c |
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*/ pr->acpi_id = object.processor.proc_id; |
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cpu_index = convert_acpiid_to_cpu(pr->acpi_id); |
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|
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/* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
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if (!cpu0_initialized && (cpu_index == 0xff) && |
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(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. */ |
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if (cpu_index >= NR_CPUS) { |
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if (ACPI_FAILURE (acpi_processor_hotadd_init(pr->handle, &pr->id))) { |
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
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"Error getting cpuindex for acpiid 0x%x ", pr->acpi_id)); return_VALUE(-ENODEV); } } |
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d] ", pr->id, |
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pr->acpi_id)); |
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if (!object.processor.pblk_address) ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address) ")); else if (object.processor.pblk_length != 6) ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid PBLK length [%d] ", |
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object.processor.pblk_length)); |
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else { pr->throttling.address = object.processor.pblk_address; pr->throttling.duty_offset = acpi_fadt.duty_offset; pr->throttling.duty_width = acpi_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"); } #ifdef CONFIG_CPU_FREQ acpi_processor_ppc_has_changed(pr); #endif acpi_processor_get_throttling_info(pr); acpi_processor_get_limit_info(pr); return_VALUE(0); } |
4be44fcd3 [ACPI] Lindent al... |
554 |
static int acpi_processor_start(struct acpi_device *device) |
1da177e4c Linux-2.6.12-rc2 |
555 |
{ |
4be44fcd3 [ACPI] Lindent al... |
556 557 558 |
int result = 0; acpi_status status = AE_OK; struct acpi_processor *pr; |
1da177e4c Linux-2.6.12-rc2 |
559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 |
ACPI_FUNCTION_TRACE("acpi_processor_start"); pr = acpi_driver_data(device); result = acpi_processor_get_info(pr); if (result) { /* Processor is physically not present */ return_VALUE(0); } BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0)); processors[pr->id] = pr; result = acpi_processor_add_fs(device); if (result) goto end; status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
4be44fcd3 [ACPI] Lindent al... |
579 |
acpi_processor_notify, pr); |
1da177e4c Linux-2.6.12-rc2 |
580 581 |
if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
4be44fcd3 [ACPI] Lindent al... |
582 583 |
"Error installing device notify handler ")); |
1da177e4c Linux-2.6.12-rc2 |
584 585 586 587 588 589 |
} acpi_processor_power_init(pr, device); if (pr->flags.throttling) { printk(KERN_INFO PREFIX "%s [%s] (supports", |
4be44fcd3 [ACPI] Lindent al... |
590 |
acpi_device_name(device), acpi_device_bid(device)); |
1da177e4c Linux-2.6.12-rc2 |
591 592 593 594 |
printk(" %d throttling states", pr->throttling.state_count); printk(") "); } |
4be44fcd3 [ACPI] Lindent al... |
595 |
end: |
1da177e4c Linux-2.6.12-rc2 |
596 597 598 |
return_VALUE(result); } |
4be44fcd3 [ACPI] Lindent al... |
599 |
static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4c Linux-2.6.12-rc2 |
600 |
{ |
4be44fcd3 [ACPI] Lindent al... |
601 602 |
struct acpi_processor *pr = (struct acpi_processor *)data; struct acpi_device *device = NULL; |
1da177e4c Linux-2.6.12-rc2 |
603 604 605 606 607 608 609 610 611 612 613 614 615 |
ACPI_FUNCTION_TRACE("acpi_processor_notify"); if (!pr) return_VOID; if (acpi_bus_get_device(pr->handle, &device)) return_VOID; switch (event) { case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: acpi_processor_ppc_has_changed(pr); acpi_bus_generate_event(device, event, |
4be44fcd3 [ACPI] Lindent al... |
616 |
pr->performance_platform_limit); |
1da177e4c Linux-2.6.12-rc2 |
617 618 619 620 621 622 623 |
break; case ACPI_PROCESSOR_NOTIFY_POWER: acpi_processor_cst_has_changed(pr); acpi_bus_generate_event(device, event, 0); break; default: ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd3 [ACPI] Lindent al... |
624 625 |
"Unsupported event [0x%x] ", event)); |
1da177e4c Linux-2.6.12-rc2 |
626 627 628 629 630 |
break; } return_VOID; } |
4be44fcd3 [ACPI] Lindent al... |
631 |
static int acpi_processor_add(struct acpi_device *device) |
1da177e4c Linux-2.6.12-rc2 |
632 |
{ |
4be44fcd3 [ACPI] Lindent al... |
633 |
struct acpi_processor *pr = NULL; |
1da177e4c Linux-2.6.12-rc2 |
634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 |
ACPI_FUNCTION_TRACE("acpi_processor_add"); if (!device) return_VALUE(-EINVAL); pr = kmalloc(sizeof(struct acpi_processor), GFP_KERNEL); if (!pr) return_VALUE(-ENOMEM); memset(pr, 0, sizeof(struct acpi_processor)); pr->handle = device->handle; strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); acpi_driver_data(device) = pr; return_VALUE(0); } |
4be44fcd3 [ACPI] Lindent al... |
652 |
static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4c Linux-2.6.12-rc2 |
653 |
{ |
4be44fcd3 [ACPI] Lindent al... |
654 655 |
acpi_status status = AE_OK; struct acpi_processor *pr = NULL; |
1da177e4c Linux-2.6.12-rc2 |
656 657 658 659 660 |
ACPI_FUNCTION_TRACE("acpi_processor_remove"); if (!device || !acpi_driver_data(device)) return_VALUE(-EINVAL); |
4be44fcd3 [ACPI] Lindent al... |
661 |
pr = (struct acpi_processor *)acpi_driver_data(device); |
1da177e4c Linux-2.6.12-rc2 |
662 663 664 665 666 667 668 669 670 671 672 673 674 675 |
if (pr->id >= NR_CPUS) { kfree(pr); return_VALUE(0); } if (type == ACPI_BUS_REMOVAL_EJECT) { if (acpi_processor_handle_eject(pr)) return_VALUE(-EINVAL); } acpi_processor_power_exit(pr, device); status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
4be44fcd3 [ACPI] Lindent al... |
676 |
acpi_processor_notify); |
1da177e4c Linux-2.6.12-rc2 |
677 678 |
if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
4be44fcd3 [ACPI] Lindent al... |
679 680 |
"Error removing notify handler ")); |
1da177e4c Linux-2.6.12-rc2 |
681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 |
} acpi_processor_remove_fs(device); processors[pr->id] = NULL; kfree(pr); return_VALUE(0); } #ifdef CONFIG_ACPI_HOTPLUG_CPU /**************************************************************************** * Acpi processor hotplug support * ****************************************************************************/ static int is_processor_present(acpi_handle handle); |
4be44fcd3 [ACPI] Lindent al... |
698 |
static int is_processor_present(acpi_handle handle) |
1da177e4c Linux-2.6.12-rc2 |
699 |
{ |
4be44fcd3 [ACPI] Lindent al... |
700 701 |
acpi_status status; unsigned long sta = 0; |
1da177e4c Linux-2.6.12-rc2 |
702 703 704 705 706 707 |
ACPI_FUNCTION_TRACE("is_processor_present"); status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); if (ACPI_FAILURE(status) || !(sta & ACPI_STA_PRESENT)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
4be44fcd3 [ACPI] Lindent al... |
708 709 |
"Processor Device is not present ")); |
1da177e4c Linux-2.6.12-rc2 |
710 711 712 713 |
return_VALUE(0); } return_VALUE(1); } |
1da177e4c Linux-2.6.12-rc2 |
714 |
static |
4be44fcd3 [ACPI] Lindent al... |
715 |
int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4c Linux-2.6.12-rc2 |
716 |
{ |
4be44fcd3 [ACPI] Lindent al... |
717 718 719 |
acpi_handle phandle; struct acpi_device *pdev; struct acpi_processor *pr; |
1da177e4c Linux-2.6.12-rc2 |
720 721 722 723 724 725 726 727 728 729 730 731 732 733 |
ACPI_FUNCTION_TRACE("acpi_processor_device_add"); if (acpi_get_parent(handle, &phandle)) { return_VALUE(-ENODEV); } if (acpi_bus_get_device(phandle, &pdev)) { return_VALUE(-ENODEV); } if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { return_VALUE(-ENODEV); } |
3fb02738b [PATCH] acpi brid... |
734 |
acpi_bus_start(*device); |
1da177e4c Linux-2.6.12-rc2 |
735 736 737 738 |
pr = acpi_driver_data(*device); if (!pr) return_VALUE(-ENODEV); |
4be44fcd3 [ACPI] Lindent al... |
739 |
if ((pr->id >= 0) && (pr->id < NR_CPUS)) { |
1da177e4c Linux-2.6.12-rc2 |
740 741 742 743 |
kobject_hotplug(&(*device)->kobj, KOBJ_ONLINE); } return_VALUE(0); } |
1da177e4c Linux-2.6.12-rc2 |
744 |
static void |
4be44fcd3 [ACPI] Lindent al... |
745 |
acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) |
1da177e4c Linux-2.6.12-rc2 |
746 |
{ |
4be44fcd3 [ACPI] Lindent al... |
747 748 |
struct acpi_processor *pr; struct acpi_device *device = NULL; |
1da177e4c Linux-2.6.12-rc2 |
749 750 751 752 753 754 755 756 757 |
int result; ACPI_FUNCTION_TRACE("acpi_processor_hotplug_notify"); switch (event) { case ACPI_NOTIFY_BUS_CHECK: case ACPI_NOTIFY_DEVICE_CHECK: printk("Processor driver received %s event ", |
4be44fcd3 [ACPI] Lindent al... |
758 759 |
(event == ACPI_NOTIFY_BUS_CHECK) ? "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); |
1da177e4c Linux-2.6.12-rc2 |
760 761 762 763 764 765 766 767 |
if (!is_processor_present(handle)) break; if (acpi_bus_get_device(handle, &device)) { result = acpi_processor_device_add(handle, &device); if (result) ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
4be44fcd3 [ACPI] Lindent al... |
768 769 |
"Unable to add the device ")); |
1da177e4c Linux-2.6.12-rc2 |
770 771 772 773 774 775 |
break; } pr = acpi_driver_data(device); if (!pr) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
4be44fcd3 [ACPI] Lindent al... |
776 777 |
"Driver data is NULL ")); |
1da177e4c Linux-2.6.12-rc2 |
778 779 780 781 782 783 784 785 786 |
break; } if (pr->id >= 0 && (pr->id < NR_CPUS)) { kobject_hotplug(&device->kobj, KOBJ_OFFLINE); break; } result = acpi_processor_start(device); |
4be44fcd3 [ACPI] Lindent al... |
787 |
if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) { |
1da177e4c Linux-2.6.12-rc2 |
788 789 790 |
kobject_hotplug(&device->kobj, KOBJ_ONLINE); } else { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
4be44fcd3 [ACPI] Lindent al... |
791 792 793 |
"Device [%s] failed to start ", acpi_device_bid(device))); |
1da177e4c Linux-2.6.12-rc2 |
794 |
} |
4be44fcd3 [ACPI] Lindent al... |
795 |
break; |
1da177e4c Linux-2.6.12-rc2 |
796 |
case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd3 [ACPI] Lindent al... |
797 798 799 |
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "received ACPI_NOTIFY_EJECT_REQUEST ")); |
1da177e4c Linux-2.6.12-rc2 |
800 801 |
if (acpi_bus_get_device(handle, &device)) { |
4be44fcd3 [ACPI] Lindent al... |
802 803 804 |
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Device don't exist, dropping EJECT ")); |
1da177e4c Linux-2.6.12-rc2 |
805 806 807 808 |
break; } pr = acpi_driver_data(device); if (!pr) { |
4be44fcd3 [ACPI] Lindent al... |
809 810 811 |
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Driver data is NULL, dropping EJECT ")); |
1da177e4c Linux-2.6.12-rc2 |
812 813 814 815 816 817 818 819 |
return_VOID; } if ((pr->id < NR_CPUS) && (cpu_present(pr->id))) kobject_hotplug(&device->kobj, KOBJ_OFFLINE); break; default: ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd3 [ACPI] Lindent al... |
820 821 |
"Unsupported event [0x%x] ", event)); |
1da177e4c Linux-2.6.12-rc2 |
822 823 824 825 826 827 828 829 |
break; } return_VOID; } static acpi_status processor_walk_namespace_cb(acpi_handle handle, |
4be44fcd3 [ACPI] Lindent al... |
830 |
u32 lvl, void *context, void **rv) |
1da177e4c Linux-2.6.12-rc2 |
831 |
{ |
4be44fcd3 [ACPI] Lindent al... |
832 |
acpi_status status; |
1da177e4c Linux-2.6.12-rc2 |
833 |
int *action = context; |
4be44fcd3 [ACPI] Lindent al... |
834 |
acpi_object_type type = 0; |
1da177e4c Linux-2.6.12-rc2 |
835 836 837 |
status = acpi_get_type(handle, &type); if (ACPI_FAILURE(status)) |
4be44fcd3 [ACPI] Lindent al... |
838 |
return (AE_OK); |
1da177e4c Linux-2.6.12-rc2 |
839 840 |
if (type != ACPI_TYPE_PROCESSOR) |
4be44fcd3 [ACPI] Lindent al... |
841 |
return (AE_OK); |
1da177e4c Linux-2.6.12-rc2 |
842 |
|
4be44fcd3 [ACPI] Lindent al... |
843 |
switch (*action) { |
1da177e4c Linux-2.6.12-rc2 |
844 845 |
case INSTALL_NOTIFY_HANDLER: acpi_install_notify_handler(handle, |
4be44fcd3 [ACPI] Lindent al... |
846 847 848 |
ACPI_SYSTEM_NOTIFY, acpi_processor_hotplug_notify, NULL); |
1da177e4c Linux-2.6.12-rc2 |
849 850 851 |
break; case UNINSTALL_NOTIFY_HANDLER: acpi_remove_notify_handler(handle, |
4be44fcd3 [ACPI] Lindent al... |
852 853 |
ACPI_SYSTEM_NOTIFY, acpi_processor_hotplug_notify); |
1da177e4c Linux-2.6.12-rc2 |
854 855 856 857 |
break; default: break; } |
4be44fcd3 [ACPI] Lindent al... |
858 |
return (AE_OK); |
1da177e4c Linux-2.6.12-rc2 |
859 |
} |
4be44fcd3 [ACPI] Lindent al... |
860 |
static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4c Linux-2.6.12-rc2 |
861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 |
{ ACPI_FUNCTION_TRACE("acpi_processor_hotadd_init"); if (!is_processor_present(handle)) { return_VALUE(AE_ERROR); } if (acpi_map_lsapic(handle, p_cpu)) return_VALUE(AE_ERROR); if (arch_register_cpu(*p_cpu)) { acpi_unmap_lsapic(*p_cpu); return_VALUE(AE_ERROR); } return_VALUE(AE_OK); } |
4be44fcd3 [ACPI] Lindent al... |
878 |
static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4c Linux-2.6.12-rc2 |
879 880 |
{ if (cpu_online(pr->id)) { |
4be44fcd3 [ACPI] Lindent al... |
881 |
return (-EINVAL); |
1da177e4c Linux-2.6.12-rc2 |
882 883 884 |
} arch_unregister_cpu(pr->id); acpi_unmap_lsapic(pr->id); |
4be44fcd3 [ACPI] Lindent al... |
885 |
return (0); |
1da177e4c Linux-2.6.12-rc2 |
886 887 |
} #else |
4be44fcd3 [ACPI] Lindent al... |
888 |
static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4c Linux-2.6.12-rc2 |
889 890 891 |
{ return AE_ERROR; } |
4be44fcd3 [ACPI] Lindent al... |
892 |
static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4c Linux-2.6.12-rc2 |
893 |
{ |
4be44fcd3 [ACPI] Lindent al... |
894 |
return (-EINVAL); |
1da177e4c Linux-2.6.12-rc2 |
895 896 |
} #endif |
1da177e4c Linux-2.6.12-rc2 |
897 898 899 900 901 902 |
static void acpi_processor_install_hotplug_notify(void) { #ifdef CONFIG_ACPI_HOTPLUG_CPU int action = INSTALL_NOTIFY_HANDLER; acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
4be44fcd3 [ACPI] Lindent al... |
903 904 905 |
ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, processor_walk_namespace_cb, &action, NULL); |
1da177e4c Linux-2.6.12-rc2 |
906 907 |
#endif } |
1da177e4c Linux-2.6.12-rc2 |
908 909 910 911 912 913 |
static void acpi_processor_uninstall_hotplug_notify(void) { #ifdef CONFIG_ACPI_HOTPLUG_CPU int action = UNINSTALL_NOTIFY_HANDLER; acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
4be44fcd3 [ACPI] Lindent al... |
914 915 916 |
ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, processor_walk_namespace_cb, &action, NULL); |
1da177e4c Linux-2.6.12-rc2 |
917 918 919 920 921 922 923 924 |
#endif } /* * 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 */ |
4be44fcd3 [ACPI] Lindent al... |
925 |
static int __init acpi_processor_init(void) |
1da177e4c Linux-2.6.12-rc2 |
926 |
{ |
4be44fcd3 [ACPI] Lindent al... |
927 |
int result = 0; |
1da177e4c Linux-2.6.12-rc2 |
928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 |
ACPI_FUNCTION_TRACE("acpi_processor_init"); memset(&processors, 0, sizeof(processors)); memset(&errata, 0, sizeof(errata)); acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); if (!acpi_processor_dir) return_VALUE(0); acpi_processor_dir->owner = THIS_MODULE; result = acpi_bus_register_driver(&acpi_processor_driver); if (result < 0) { remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); return_VALUE(0); } acpi_processor_install_hotplug_notify(); acpi_thermal_cpufreq_init(); acpi_processor_ppc_init(); return_VALUE(0); } |
4be44fcd3 [ACPI] Lindent al... |
953 |
static void __exit acpi_processor_exit(void) |
1da177e4c Linux-2.6.12-rc2 |
954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 |
{ ACPI_FUNCTION_TRACE("acpi_processor_exit"); acpi_processor_ppc_exit(); acpi_thermal_cpufreq_exit(); acpi_processor_uninstall_hotplug_notify(); acpi_bus_unregister_driver(&acpi_processor_driver); remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); return_VOID; } |
1da177e4c Linux-2.6.12-rc2 |
969 970 971 972 973 974 |
module_init(acpi_processor_init); module_exit(acpi_processor_exit); EXPORT_SYMBOL(acpi_processor_set_thermal_limit); MODULE_ALIAS("processor"); |