mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-24 01:41:39 +00:00
Code Issues Releases Wiki Activity

Merge branch 'acpi-pci-hotplug'

Browse source 
* acpi-pci-hotplug: (34 commits)
  ACPI / PM: Hold acpi_scan_lock over system PM transitions
  ACPI / hotplug / PCI: Fix NULL pointer dereference in cleanup_bridge()
  PCI / ACPI: Use dev_dbg() instead of dev_info() in acpi_pci_set_power_state()
  ACPI / hotplug / PCI: Get rid of check_sub_bridges()
  ACPI / hotplug / PCI: Clean up bridge_mutex usage
  ACPI / hotplug / PCI: Redefine enable_device() and disable_device()
  ACPI / hotplug / PCI: Sanitize acpiphp_get_(latch)|(adapter)_status()
  ACPI / hotplug / PCI: Get rid of unused constants in acpiphp.h
  ACPI / hotplug / PCI: Check for new devices on enabled slots
  ACPI / hotplug / PCI: Allow slots without new devices to be rescanned
  ACPI / hotplug / PCI: Do not check SLOT_ENABLED in enable_device()
  ACPI / hotplug / PCI: Do not exectute _PS0 and _PS3 directly
  ACPI / hotplug / PCI: Do not queue up event handling work items in vain
  ACPI / hotplug / PCI: Consolidate slot disabling and ejecting
  ACPI / hotplug / PCI: Drop redundant checks from check_hotplug_bridge()
  ACPI / hotplug / PCI: Rework namespace scanning and trimming routines
  ACPI / hotplug / PCI: Store parent in functions and bus in slots
  ACPI / hotplug / PCI: Drop handle field from struct acpiphp_bridge
  ACPI / hotplug / PCI: Drop handle field from struct acpiphp_func
  ACPI / hotplug / PCI: Embed function struct into struct acpiphp_context
  ...
This commit is contained in:
Rafael J. Wysocki 2013-08-27 01:26:37 +02:00
commit abe5430e9d
9 changed files with 481 additions and 685 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
arch/x86/pci/i386.c
View file

@ -210,6 +210,8 @@ static void pcibios_allocate_bridge_resources(struct pci_dev *dev)
r = &dev->resource[idx];
if (!r->flags)
continue;
if (r->parent) /* Already allocated */
continue;
if (!r->start || pci_claim_resource(dev, idx) < 0) {
/*
* Something is wrong with the region.
@ -318,6 +320,8 @@ static void pcibios_allocate_dev_rom_resource(struct pci_dev *dev)
r = &dev->resource[PCI_ROM_RESOURCE];
if (!r->flags || !r->start)
return;
if (r->parent) /* Already allocated */
return;
if (pci_claim_resource(dev, PCI_ROM_RESOURCE) < 0) {
r->end -= r->start;

14
drivers/acpi/pci_slot.c
View file

@ -159,12 +159,16 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
return AE_OK;
}
void acpi_pci_slot_enumerate(struct pci_bus *bus, acpi_handle handle)
void acpi_pci_slot_enumerate(struct pci_bus *bus)
{
mutex_lock(&slot_list_lock);
acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
register_slot, NULL, bus, NULL);
mutex_unlock(&slot_list_lock);
acpi_handle handle = ACPI_HANDLE(bus->bridge);
if (handle) {
mutex_lock(&slot_list_lock);
acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
register_slot, NULL, bus, NULL);
mutex_unlock(&slot_list_lock);
}
}
void acpi_pci_slot_remove(struct pci_bus *bus)

39
drivers/acpi/sleep.c
View file

@ -420,10 +420,21 @@ static void acpi_pm_finish(void)
}
/**
* acpi_pm_end - Finish up suspend sequence.
* acpi_pm_start - Start system PM transition.
*/
static void acpi_pm_start(u32 acpi_state)
{
acpi_target_sleep_state = acpi_state;
acpi_sleep_tts_switch(acpi_target_sleep_state);
acpi_scan_lock_acquire();
}
/**
* acpi_pm_end - Finish up system PM transition.
*/
static void acpi_pm_end(void)
{
acpi_scan_lock_release();
/*
* This is necessary in case acpi_pm_finish() is not called during a
* failing transition to a sleep state.
@ -451,21 +462,19 @@ static u32 acpi_suspend_states[] = {
static int acpi_suspend_begin(suspend_state_t pm_state)
{
u32 acpi_state = acpi_suspend_states[pm_state];
int error = 0;
int error;
error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc();
if (error)
return error;
if (sleep_states[acpi_state]) {
acpi_target_sleep_state = acpi_state;
acpi_sleep_tts_switch(acpi_target_sleep_state);
} else {
printk(KERN_ERR "ACPI does not support this state: %d\n",
pm_state);
error = -ENOSYS;
if (!sleep_states[acpi_state]) {
pr_err("ACPI does not support sleep state S%u\n", acpi_state);
return -ENOSYS;
}
return error;
acpi_pm_start(acpi_state);
return 0;
}
/**
@ -631,10 +640,8 @@ static int acpi_hibernation_begin(void)
int error;
error = nvs_nosave ? 0 : suspend_nvs_alloc();
if (!error) {
acpi_target_sleep_state = ACPI_STATE_S4;
acpi_sleep_tts_switch(acpi_target_sleep_state);
}
if (!error)
acpi_pm_start(ACPI_STATE_S4);
return error;
}
@ -713,8 +720,10 @@ static int acpi_hibernation_begin_old(void)
if (!error) {
if (!nvs_nosave)
error = suspend_nvs_alloc();
if (!error)
if (!error) {
acpi_target_sleep_state = ACPI_STATE_S4;
acpi_scan_lock_acquire();
}
}
return error;
}

54
drivers/pci/hotplug/acpiphp.h
View file

@ -49,6 +49,7 @@
#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
struct acpiphp_context;
struct acpiphp_bridge;
struct acpiphp_slot;
@ -59,6 +60,7 @@ struct slot {
struct hotplug_slot *hotplug_slot;
struct acpiphp_slot *acpi_slot;
struct hotplug_slot_info info;
unsigned int sun; /* ACPI _SUN (Slot User Number) value */
};
static inline const char *slot_name(struct slot *slot)
@ -75,15 +77,11 @@ struct acpiphp_bridge {
struct list_head list;
struct list_head slots;
struct kref ref;
acpi_handle handle;
/* Ejectable PCI-to-PCI bridge (PCI bridge and PCI function) */
struct acpiphp_func *func;
struct acpiphp_context *context;
int nr_slots;
u32 flags;
/* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
struct pci_bus *pci_bus;
@ -99,15 +97,13 @@ struct acpiphp_bridge {
*/
struct acpiphp_slot {
struct list_head node;
struct acpiphp_bridge *bridge; /* parent */
struct pci_bus *bus;
struct list_head funcs; /* one slot may have different
objects (i.e. for each function) */
struct slot *slot;
struct mutex crit_sect;
u8 device; /* pci device# */
unsigned long long sun; /* ACPI _SUN (slot unique number) */
u32 flags; /* see below */
};
@ -119,15 +115,32 @@ struct acpiphp_slot {
* typically 8 objects per slot (i.e. for each PCI function)
*/
struct acpiphp_func {
struct acpiphp_slot *slot; /* parent */
struct acpiphp_bridge *parent;
struct acpiphp_slot *slot;
struct list_head sibling;
acpi_handle handle;
u8 function; /* pci function# */
u32 flags; /* see below */
};
struct acpiphp_context {
acpi_handle handle;
struct acpiphp_func func;
struct acpiphp_bridge *bridge;
unsigned int refcount;
};
static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
{
return container_of(func, struct acpiphp_context, func);
}
static inline acpi_handle func_to_handle(struct acpiphp_func *func)
{
return func_to_context(func)->handle;
}
/*
* struct acpiphp_attention_info - device specific attention registration
*
@ -141,45 +154,32 @@ struct acpiphp_attention_info
struct module *owner;
};
/* PCI bus bridge HID */
#define ACPI_PCI_HOST_HID "PNP0A03"
/* ACPI _STA method value (ignore bit 4; battery present) */
#define ACPI_STA_ALL (0x0000000f)
/* bridge flags */
#define BRIDGE_HAS_EJ0 (0x00000001)
/* slot flags */
#define SLOT_POWEREDON (0x00000001)
#define SLOT_ENABLED (0x00000002)
#define SLOT_MULTIFUNCTION (0x00000004)
#define SLOT_ENABLED (0x00000001)
/* function flags */
#define FUNC_HAS_STA (0x00000001)
#define FUNC_HAS_EJ0 (0x00000002)
#define FUNC_HAS_PS0 (0x00000010)
#define FUNC_HAS_PS1 (0x00000020)
#define FUNC_HAS_PS2 (0x00000040)
#define FUNC_HAS_PS3 (0x00000080)
#define FUNC_HAS_DCK (0x00000100)
#define FUNC_HAS_DCK (0x00000004)
/* function prototypes */
/* acpiphp_core.c */
int acpiphp_register_attention(struct acpiphp_attention_info*info);
int acpiphp_unregister_attention(struct acpiphp_attention_info *info);
int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot);
int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun);
void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
/* acpiphp_glue.c */
typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
int acpiphp_enable_slot(struct acpiphp_slot *slot);
int acpiphp_disable_slot(struct acpiphp_slot *slot);
int acpiphp_eject_slot(struct acpiphp_slot *slot);
int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot);
u8 acpiphp_get_power_status(struct acpiphp_slot *slot);
u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);
u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);

18
drivers/pci/hotplug/acpiphp_core.c
View file

@ -155,15 +155,11 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
static int disable_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = hotplug_slot->private;
int retval;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
/* disable the specified slot */
retval = acpiphp_disable_slot(slot->acpi_slot);
if (!retval)
retval = acpiphp_eject_slot(slot->acpi_slot);
return retval;
return acpiphp_disable_and_eject_slot(slot->acpi_slot);
}
@ -290,7 +286,8 @@ static void release_slot(struct hotplug_slot *hotplug_slot)
}
/* callback routine to initialize 'struct slot' for each slot */
int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot,
unsigned int sun)
{
struct slot *slot;
int retval = -ENOMEM;
@ -317,12 +314,11 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);
acpiphp_slot->slot = slot;
snprintf(name, SLOT_NAME_SIZE, "%llu", slot->acpi_slot->sun);
slot->sun = sun;
snprintf(name, SLOT_NAME_SIZE, "%u", sun);
retval = pci_hp_register(slot->hotplug_slot,
acpiphp_slot->bridge->pci_bus,
acpiphp_slot->device,
name);
retval = pci_hp_register(slot->hotplug_slot, acpiphp_slot->bus,
acpiphp_slot->device, name);
if (retval == -EBUSY)
goto error_hpslot;
if (retval) {

1007
drivers/pci/hotplug/acpiphp_glue.c
View file

File diff suppressed because it is too large Load diff

2
drivers/pci/hotplug/acpiphp_ibm.c
View file

@ -66,7 +66,7 @@ do { \
#define IBM_HARDWARE_ID1 "IBM37D0"
#define IBM_HARDWARE_ID2 "IBM37D4"
#define hpslot_to_sun(A) (((struct slot *)((A)->private))->acpi_slot->sun)
#define hpslot_to_sun(A) (((struct slot *)((A)->private))->sun)
/* union apci_descriptor - allows access to the
* various device descriptors that are embedded in the

18
drivers/pci/pci-acpi.c
View file

@ -210,7 +210,7 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
}
if (!error)
dev_info(&dev->dev, "power state changed by ACPI to %s\n",
dev_dbg(&dev->dev, "power state changed by ACPI to %s\n",
acpi_power_state_string(state_conv[state]));
return error;
@ -290,24 +290,16 @@ static struct pci_platform_pm_ops acpi_pci_platform_pm = {
void acpi_pci_add_bus(struct pci_bus *bus)
{
acpi_handle handle = NULL;
if (bus->bridge)
handle = ACPI_HANDLE(bus->bridge);
if (acpi_pci_disabled || handle == NULL)
if (acpi_pci_disabled || !bus->bridge)
return;
acpi_pci_slot_enumerate(bus, handle);
acpiphp_enumerate_slots(bus, handle);
acpi_pci_slot_enumerate(bus);
acpiphp_enumerate_slots(bus);
}
void acpi_pci_remove_bus(struct pci_bus *bus)
{
/*
* bus->bridge->acpi_node.handle has already been reset to NULL
* when acpi_pci_remove_bus() is called, so don't check ACPI handle.
*/
if (acpi_pci_disabled)
if (acpi_pci_disabled || !bus->bridge)
return;
acpiphp_remove_slots(bus);

10
include/linux/pci-acpi.h
View file

@ -47,24 +47,22 @@ void acpi_pci_remove_bus(struct pci_bus *bus);
#ifdef CONFIG_ACPI_PCI_SLOT
void acpi_pci_slot_init(void);
void acpi_pci_slot_enumerate(struct pci_bus *bus, acpi_handle handle);
void acpi_pci_slot_enumerate(struct pci_bus *bus);
void acpi_pci_slot_remove(struct pci_bus *bus);
#else
static inline void acpi_pci_slot_init(void) { }
static inline void acpi_pci_slot_enumerate(struct pci_bus *bus,
acpi_handle handle) { }
static inline void acpi_pci_slot_enumerate(struct pci_bus *bus) { }
static inline void acpi_pci_slot_remove(struct pci_bus *bus) { }
#endif
#ifdef CONFIG_HOTPLUG_PCI_ACPI
void acpiphp_init(void);
void acpiphp_enumerate_slots(struct pci_bus *bus, acpi_handle handle);
void acpiphp_enumerate_slots(struct pci_bus *bus);
void acpiphp_remove_slots(struct pci_bus *bus);
void acpiphp_check_host_bridge(acpi_handle handle);
#else
static inline void acpiphp_init(void) { }
static inline void acpiphp_enumerate_slots(struct pci_bus *bus,
acpi_handle handle) { }
static inline void acpiphp_enumerate_slots(struct pci_bus *bus) { }
static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
static inline void acpiphp_check_host_bridge(acpi_handle handle) { }
#endif