diff options
Diffstat (limited to 'drivers/pci/hotplug/pciehp.h')
| -rw-r--r-- | drivers/pci/hotplug/pciehp.h | 67 |
1 files changed, 30 insertions, 37 deletions
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h index b9204ef3ecd7..df9308f6dafa 100644 --- a/drivers/pci/hotplug/pciehp.h +++ b/drivers/pci/hotplug/pciehp.h @@ -59,31 +59,12 @@ do { \ #define SLOT_NAME_SIZE 10 /** - * struct slot - PCIe hotplug slot - * @state: current state machine position - * @ctrl: pointer to the slot's controller structure - * @hotplug_slot: pointer to the structure registered with the PCI hotplug core - * @work: work item to turn the slot on or off after 5 seconds in response to - * an Attention Button press - * @lock: protects reads and writes of @state; - * protects scheduling, execution and cancellation of @work - */ -struct slot { - u8 state; - struct controller *ctrl; - struct hotplug_slot *hotplug_slot; - struct delayed_work work; - struct mutex lock; -}; - -/** * struct controller - PCIe hotplug controller * @ctrl_lock: serializes writes to the Slot Control register * @pcie: pointer to the controller's PCIe port service device * @reset_lock: prevents access to the Data Link Layer Link Active bit in the * Link Status register and to the Presence Detect State bit in the Slot * Status register during a slot reset which may cause them to flap - * @slot: pointer to the controller's slot structure * @queue: wait queue to wake up on reception of a Command Completed event, * used for synchronous writes to the Slot Control register * @slot_cap: cached copy of the Slot Capabilities register @@ -105,15 +86,23 @@ 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 + * @state: current state machine position + * @lock: protects reads and writes of @state; + * protects scheduling, execution and cancellation of @work + * @work: work item to turn the slot on or off after 5 seconds + * in response to an Attention Button press + * @hotplug_slot: pointer to the structure registered with the PCI hotplug core * @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 + * + * PCIe hotplug has a 1:1 relationship between controller and slot, hence + * unlike other drivers, the two aren't represented by separate structures. */ struct controller { struct mutex ctrl_lock; struct pcie_device *pcie; struct rw_semaphore reset_lock; - struct slot *slot; wait_queue_head_t queue; u32 slot_cap; u16 slot_ctrl; @@ -124,6 +113,10 @@ struct controller { unsigned int notification_enabled:1; unsigned int power_fault_detected; atomic_t pending_events; + u8 state; + struct mutex lock; + struct delayed_work work; + struct hotplug_slot *hotplug_slot; int request_result; wait_queue_head_t requester; }; @@ -174,26 +167,26 @@ struct controller { #define PSN(ctrl) (((ctrl)->slot_cap & PCI_EXP_SLTCAP_PSN) >> 19) 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_presence_or_link_change(struct slot *slot, u32 events); -int pciehp_configure_device(struct slot *p_slot); -void pciehp_unconfigure_device(struct slot *p_slot, bool presence); +void pciehp_handle_button_press(struct controller *ctrl); +void pciehp_handle_disable_request(struct controller *ctrl); +void pciehp_handle_presence_or_link_change(struct controller *ctrl, u32 events); +int pciehp_configure_device(struct controller *ctrl); +void pciehp_unconfigure_device(struct controller *ctrl, bool presence); void pciehp_queue_pushbutton_work(struct work_struct *work); struct controller *pcie_init(struct pcie_device *dev); int pcie_init_notification(struct controller *ctrl); void pcie_shutdown_notification(struct controller *ctrl); void pcie_clear_hotplug_events(struct controller *ctrl); -int pciehp_power_on_slot(struct slot *slot); -void pciehp_power_off_slot(struct slot *slot); -void pciehp_get_power_status(struct slot *slot, u8 *status); - -void pciehp_set_attention_status(struct slot *slot, u8 status); -void pciehp_get_latch_status(struct slot *slot, u8 *status); -int pciehp_query_power_fault(struct slot *slot); -void pciehp_green_led_on(struct slot *slot); -void pciehp_green_led_off(struct slot *slot); -void pciehp_green_led_blink(struct slot *slot); +int pciehp_power_on_slot(struct controller *ctrl); +void pciehp_power_off_slot(struct controller *ctrl); +void pciehp_get_power_status(struct controller *ctrl, u8 *status); + +void pciehp_set_attention_status(struct controller *ctrl, u8 status); +void pciehp_get_latch_status(struct controller *ctrl, u8 *status); +int pciehp_query_power_fault(struct controller *ctrl); +void pciehp_green_led_on(struct controller *ctrl); +void pciehp_green_led_off(struct controller *ctrl); +void pciehp_green_led_blink(struct controller *ctrl); bool pciehp_card_present(struct controller *ctrl); bool pciehp_card_present_or_link_active(struct controller *ctrl); int pciehp_check_link_status(struct controller *ctrl); @@ -207,9 +200,9 @@ int pciehp_get_attention_status(struct hotplug_slot *hotplug_slot, u8 *status); int pciehp_set_raw_indicator_status(struct hotplug_slot *h_slot, u8 status); int pciehp_get_raw_indicator_status(struct hotplug_slot *h_slot, u8 *status); -static inline const char *slot_name(struct slot *slot) +static inline const char *slot_name(struct controller *ctrl) { - return hotplug_slot_name(slot->hotplug_slot); + return hotplug_slot_name(ctrl->hotplug_slot); } #endif /* _PCIEHP_H */ |