diff options
Diffstat (limited to 'drivers/pci/hotplug/pciehp.h')
| -rw-r--r-- | drivers/pci/hotplug/pciehp.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h index 1ba335d6563a..ed42dde5f9ac 100644 --- a/drivers/pci/hotplug/pciehp.h +++ b/drivers/pci/hotplug/pciehp.h @@ -105,6 +105,9 @@ struct slot { * that has not yet been cleared by the user * @pending_events: used by the IRQ handler to save events retrieved from the * Slot Status register for later consumption by the IRQ thread + * @request_result: result of last user request submitted to the IRQ thread + * @requester: wait queue to wake up on completion of user request, + * used for synchronous slot enable/disable request via sysfs */ struct controller { struct mutex ctrl_lock; @@ -120,6 +123,8 @@ struct controller { unsigned int notification_enabled:1; unsigned int power_fault_detected; atomic_t pending_events; + int request_result; + wait_queue_head_t requester; }; /** @@ -141,6 +146,17 @@ struct controller { #define POWEROFF_STATE 4 #define ON_STATE 5 +/** + * DOC: Flags to request an action from the IRQ thread + * + * These are stored together with events read from the Slot Status register, + * hence must be greater than its 16-bit width. + * + * %DISABLE_SLOT: Disable the slot in response to a user request via sysfs or + * an Attention Button press after the 5 second delay + */ +#define DISABLE_SLOT (1 << 16) + #define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_ABP) #define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PCP) #define MRL_SENS(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_MRLSP) @@ -153,7 +169,9 @@ struct controller { int pciehp_sysfs_enable_slot(struct slot *slot); int pciehp_sysfs_disable_slot(struct slot *slot); +void pciehp_request(struct controller *ctrl, int action); void pciehp_handle_button_press(struct slot *slot); +void pciehp_handle_disable_request(struct slot *slot); void pciehp_handle_link_change(struct slot *slot); void pciehp_handle_presence_change(struct slot *slot); int pciehp_configure_device(struct slot *p_slot); |