diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/bus.c | 76 | ||||
| -rw-r--r-- | drivers/acpi/pci_slot.c | 43 |
2 files changed, 75 insertions, 44 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 97e270e06653..cb9558eb1e4f 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -30,6 +30,9 @@ #include <linux/acpi.h> #include <linux/slab.h> #include <linux/regulator/machine.h> +#include <linux/workqueue.h> +#include <linux/reboot.h> +#include <linux/delay.h> #ifdef CONFIG_X86 #include <asm/mpspec.h> #endif @@ -174,22 +177,17 @@ void acpi_bus_detach_private_data(acpi_handle handle) EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); static void acpi_print_osc_error(acpi_handle handle, - struct acpi_osc_context *context, char *error) + struct acpi_osc_context *context, char *error) { - struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; int i; - if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) - printk(KERN_DEBUG "%s: %s\n", context->uuid_str, error); - else { - printk(KERN_DEBUG "%s (%s): %s\n", - (char *)buffer.pointer, context->uuid_str, error); - kfree(buffer.pointer); - } - printk(KERN_DEBUG "_OSC request data:"); + acpi_handle_debug(handle, "(%s): %s\n", context->uuid_str, error); + + pr_debug("_OSC request data:"); for (i = 0; i < context->cap.length; i += sizeof(u32)) - printk(" %x", *((u32 *)(context->cap.pointer + i))); - printk("\n"); + pr_debug(" %x", *((u32 *)(context->cap.pointer + i))); + + pr_debug("\n"); } acpi_status acpi_str_to_uuid(char *str, u8 *uuid) @@ -475,6 +473,56 @@ static void acpi_device_remove_notify_handler(struct acpi_device *device) acpi_device_notify); } +/* Handle events targeting \_SB device (at present only graceful shutdown) */ + +#define ACPI_SB_NOTIFY_SHUTDOWN_REQUEST 0x81 +#define ACPI_SB_INDICATE_INTERVAL 10000 + +static void sb_notify_work(struct work_struct *dummy) +{ + acpi_handle sb_handle; + + orderly_poweroff(true); + + /* + * After initiating graceful shutdown, the ACPI spec requires OSPM + * to evaluate _OST method once every 10seconds to indicate that + * the shutdown is in progress + */ + acpi_get_handle(NULL, "\\_SB", &sb_handle); + while (1) { + pr_info("Graceful shutdown in progress.\n"); + acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN, + ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL); + msleep(ACPI_SB_INDICATE_INTERVAL); + } +} + +static void acpi_sb_notify(acpi_handle handle, u32 event, void *data) +{ + static DECLARE_WORK(acpi_sb_work, sb_notify_work); + + if (event == ACPI_SB_NOTIFY_SHUTDOWN_REQUEST) { + if (!work_busy(&acpi_sb_work)) + schedule_work(&acpi_sb_work); + } else + pr_warn("event %x is not supported by \\_SB device\n", event); +} + +static int __init acpi_setup_sb_notify_handler(void) +{ + acpi_handle sb_handle; + + if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &sb_handle))) + return -ENXIO; + + if (ACPI_FAILURE(acpi_install_notify_handler(sb_handle, ACPI_DEVICE_NOTIFY, + acpi_sb_notify, NULL))) + return -EINVAL; + + return 0; +} + /* -------------------------------------------------------------------------- Device Matching -------------------------------------------------------------------------- */ @@ -961,8 +1009,7 @@ void __init acpi_early_init(void) /** * acpi_subsystem_init - Finalize the early initialization of ACPI. * - * Switch over the platform to the ACPI mode (if possible), initialize the - * handling of ACPI events, install the interrupt and global lock handlers. + * Switch over the platform to the ACPI mode (if possible). * * Doing this too early is generally unsafe, but at the same time it needs to be * done before all things that really depend on ACPI. The right spot appears to @@ -1133,6 +1180,7 @@ static int __init acpi_init(void) acpi_sleep_proc_init(); acpi_wakeup_device_init(); acpi_debugger_init(); + acpi_setup_sb_notify_handler(); return 0; } diff --git a/drivers/acpi/pci_slot.c b/drivers/acpi/pci_slot.c index 7188e53b6b7c..f62c68e24317 100644 --- a/drivers/acpi/pci_slot.c +++ b/drivers/acpi/pci_slot.c @@ -22,8 +22,9 @@ * General Public License for more details. */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/kernel.h> -#include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/types.h> @@ -33,30 +34,11 @@ #include <linux/dmi.h> #include <linux/pci-acpi.h> -static bool debug; static int check_sta_before_sun; -#define DRIVER_VERSION "0.1" -#define DRIVER_AUTHOR "Alex Chiang <achiang@hp.com>" -#define DRIVER_DESC "ACPI PCI Slot Detection Driver" -MODULE_AUTHOR(DRIVER_AUTHOR); -MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_LICENSE("GPL"); -MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); -module_param(debug, bool, 0644); - #define _COMPONENT ACPI_PCI_COMPONENT ACPI_MODULE_NAME("pci_slot"); -#define MY_NAME "pci_slot" -#define err(format, arg...) pr_err("%s: " format , MY_NAME , ## arg) -#define info(format, arg...) pr_info("%s: " format , MY_NAME , ## arg) -#define dbg(format, arg...) \ - do { \ - if (debug) \ - pr_debug("%s: " format, MY_NAME , ## arg); \ - } while (0) - #define SLOT_NAME_SIZE 21 /* Inspired by #define in acpiphp.h */ struct acpi_pci_slot { @@ -76,7 +58,7 @@ check_slot(acpi_handle handle, unsigned long long *sun) struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); - dbg("Checking slot on path: %s\n", (char *)buffer.pointer); + pr_debug("Checking slot on path: %s\n", (char *)buffer.pointer); if (check_sta_before_sun) { /* If SxFy doesn't have _STA, we just assume it's there */ @@ -87,14 +69,16 @@ check_slot(acpi_handle handle, unsigned long long *sun) status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); if (ACPI_FAILURE(status)) { - dbg("_ADR returned %d on %s\n", status, (char *)buffer.pointer); + pr_debug("_ADR returned %d on %s\n", + status, (char *)buffer.pointer); goto out; } /* No _SUN == not a slot == bail */ status = acpi_evaluate_integer(handle, "_SUN", NULL, sun); if (ACPI_FAILURE(status)) { - dbg("_SUN returned %d on %s\n", status, (char *)buffer.pointer); + pr_debug("_SUN returned %d on %s\n", + status, (char *)buffer.pointer); goto out; } @@ -132,15 +116,13 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) } slot = kmalloc(sizeof(*slot), GFP_KERNEL); - if (!slot) { - err("%s: cannot allocate memory\n", __func__); + if (!slot) return AE_OK; - } snprintf(name, sizeof(name), "%llu", sun); pci_slot = pci_create_slot(pci_bus, device, name, NULL); if (IS_ERR(pci_slot)) { - err("pci_create_slot returned %ld\n", PTR_ERR(pci_slot)); + pr_err("pci_create_slot returned %ld\n", PTR_ERR(pci_slot)); kfree(slot); return AE_OK; } @@ -150,8 +132,8 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) get_device(&pci_bus->dev); - dbg("pci_slot: %p, pci_bus: %x, device: %d, name: %s\n", - pci_slot, pci_bus->number, device, name); + pr_debug("%p, pci_bus: %x, device: %d, name: %s\n", + pci_slot, pci_bus->number, device, name); return AE_OK; } @@ -186,7 +168,8 @@ void acpi_pci_slot_remove(struct pci_bus *bus) static int do_sta_before_sun(const struct dmi_system_id *d) { - info("%s detected: will evaluate _STA before calling _SUN\n", d->ident); + pr_info("%s detected: will evaluate _STA before calling _SUN\n", + d->ident); check_sta_before_sun = 1; return 0; } |