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Commit a2fd4b4b authored by Lv Zheng's avatar Lv Zheng Committed by Rafael J. Wysocki
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ACPICA: Add support for host-installed SCI handlers. 

This change adds support to allow hosts to install System Control
Interrupt handlers. Certain ACPI functionality requires the host
to handle raw SCIs. For example, the "SCI Doorbell" that is defined
for memory power state support requires the host device driver to
handle SCIs to examine if the doorbell has been activated. Multiple
SCI handlers can be installed to allow for future expansion.
Debugger support is included.
Lv Zheng, Bob Moore. ACPICA BZ 1032.

Bug summary:
It is reported when the PCC (Platform Communication Channel, via
MPST table, defined in ACPI specification 5.0) subchannel responds
to the host, it issues an SCI and the host must probe the subchannel
for channel status.

Buglink: http://bugs.acpica.org/show_bug.cgi?id=1032


Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Reviewed-by: default avatarLen Brown <len.brown@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent d53d8207

drivers/acpi/acpica/acdebug.h

+2 −1
Original line number Diff line number Diff line
@@ -113,6 +113,7 @@ void acpi_db_display_handlers(void); 
ACPI_HW_DEPENDENT_RETURN_VOID(void

			      acpi_db_generate_gpe(char *gpe_arg,

						   char *block_arg))

 ACPI_HW_DEPENDENT_RETURN_VOID(void acpi_db_generate_sci(void))



/*

 * dbconvert - miscellaneous conversion routines

drivers/acpi/acpica/acevents.h

+3 −3
Original line number Diff line number Diff line
@@ -242,11 +242,11 @@ acpi_ev_initialize_region(union acpi_operand_object *region_obj, 
 */

u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context);



u32 acpi_ev_install_sci_handler(void);

u32 acpi_ev_sci_dispatch(void);



acpi_status acpi_ev_remove_sci_handler(void);

u32 acpi_ev_install_sci_handler(void);



u32 acpi_ev_initialize_SCI(u32 program_SCI);

acpi_status acpi_ev_remove_all_sci_handlers(void);



ACPI_HW_DEPENDENT_RETURN_VOID(void acpi_ev_terminate(void))

#endif				/* __ACEVENTS_H__  */

drivers/acpi/acpica/acglobal.h

+1 −0
Original line number Diff line number Diff line
@@ -269,6 +269,7 @@ ACPI_EXTERN acpi_table_handler acpi_gbl_table_handler; 
ACPI_EXTERN void *acpi_gbl_table_handler_context;

ACPI_EXTERN struct acpi_walk_state *acpi_gbl_breakpoint_walk;

ACPI_EXTERN acpi_interface_handler acpi_gbl_interface_handler;

ACPI_EXTERN struct acpi_sci_handler_info *acpi_gbl_sci_handler_list;



/* Owner ID support */

drivers/acpi/acpica/aclocal.h

+8 −0
Original line number Diff line number Diff line
@@ -398,6 +398,14 @@ struct acpi_simple_repair_info { 
 *

 ****************************************************************************/



/* Dispatch info for each host-installed SCI handler */



struct acpi_sci_handler_info {

	struct acpi_sci_handler_info *next;

	acpi_sci_handler address;	/* Address of handler */

	void *context;		/* Context to be passed to handler */

};



/* Dispatch info for each GPE -- either a method or handler, cannot be both */



struct acpi_gpe_handler_info {

drivers/acpi/acpica/evmisc.c

+7 −7
Original line number Diff line number Diff line
@@ -264,13 +264,6 @@ void acpi_ev_terminate(void) 


		status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);



		/* Remove SCI handler */



		status = acpi_ev_remove_sci_handler();

		if (ACPI_FAILURE(status)) {

			ACPI_ERROR((AE_INFO, "Could not remove SCI handler"));

		}



		status = acpi_ev_remove_global_lock_handler();

		if (ACPI_FAILURE(status)) {

			ACPI_ERROR((AE_INFO,
@@ -280,6 +273,13 @@ void acpi_ev_terminate(void) 
		acpi_gbl_events_initialized = FALSE;

	}



	/* Remove SCI handlers */



	status = acpi_ev_remove_all_sci_handlers();

	if (ACPI_FAILURE(status)) {

		ACPI_ERROR((AE_INFO, "Could not remove SCI handler"));

	}



	/* Deallocate all handler objects installed within GPE info structs */



	status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL);