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Commit 9be962d5 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'acpi-extra-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 

Pull more ACPI updates from Rafael Wysocki:
 "Here are new versions of two ACPICA changes that were deferred
  previously due to a problem they had introduced, two cleanups on top
  of them and the removal of a useless warning message from the ACPI
  core.

  Specifics:

   - Move some Linux-specific functionality to upstream ACPICA and
     update the in-kernel users of it accordingly (Lv Zheng)

   - Drop a useless warning (triggered by the lack of an optional
     object) from the ACPI namespace scanning code (Zhang Rui)"

* tag 'acpi-extra-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / osl: Remove deprecated acpi_get_table_with_size()/early_acpi_os_unmap_memory()
  ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() users
  ACPICA: Tables: Allow FADT to be customized with virtual address
  ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel
  ACPI: do not warn if _BQC does not exist
parents 85ba70b6 c8e008e2

arch/arm64/include/asm/acpi.h

+1 −1
Original line number Diff line number Diff line
@@ -29,7 +29,7 @@ 


/* Basic configuration for ACPI */

#ifdef	CONFIG_ACPI

/* ACPI table mapping after acpi_gbl_permanent_mmap is set */

/* ACPI table mapping after acpi_permanent_mmap is set */

static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,

					    acpi_size size)

{

arch/arm64/kernel/acpi.c

+3 −4
Original line number Diff line number Diff line
@@ -132,14 +132,13 @@ static int __init acpi_fadt_sanity_check(void) 
	struct acpi_table_header *table;

	struct acpi_table_fadt *fadt;

	acpi_status status;

	acpi_size tbl_size;

	int ret = 0;



	/*

	 * FADT is required on arm64; retrieve it to check its presence

	 * and carry out revision and ACPI HW reduced compliancy tests

	 */

	status = acpi_get_table_with_size(ACPI_SIG_FADT, 0, &table, &tbl_size);

	status = acpi_get_table(ACPI_SIG_FADT, 0, &table);

	if (ACPI_FAILURE(status)) {

		const char *msg = acpi_format_exception(status);
@@ -170,10 +169,10 @@ static int __init acpi_fadt_sanity_check(void) 


out:

	/*

	 * acpi_get_table_with_size() creates FADT table mapping that

	 * acpi_get_table() creates FADT table mapping that

	 * should be released after parsing and before resuming boot

	 */

	early_acpi_os_unmap_memory(table, tbl_size);

	acpi_put_table(table);

	return ret;

}

drivers/acpi/acpica/actables.h

+6 −0
Original line number Diff line number Diff line
@@ -166,6 +166,12 @@ acpi_tb_install_table_with_override(struct acpi_table_desc *new_table_desc, 


acpi_status acpi_tb_parse_root_table(acpi_physical_address rsdp_address);



acpi_status

acpi_tb_get_table(struct acpi_table_desc *table_desc,

		  struct acpi_table_header **out_table);



void acpi_tb_put_table(struct acpi_table_desc *table_desc);



/*

 * tbxfload

 */

drivers/acpi/acpica/tbfadt.c

+7 −7
Original line number Diff line number Diff line
@@ -311,6 +311,8 @@ void acpi_tb_parse_fadt(void) 
{

	u32 length;

	struct acpi_table_header *table;

	struct acpi_table_desc *fadt_desc;

	acpi_status status;



	/*

	 * The FADT has multiple versions with different lengths,
@@ -319,14 +321,12 @@ void acpi_tb_parse_fadt(void) 
	 * Get a local copy of the FADT and convert it to a common format

	 * Map entire FADT, assumed to be smaller than one page.

	 */

	length = acpi_gbl_root_table_list.tables[acpi_gbl_fadt_index].length;



	table =

	    acpi_os_map_memory(acpi_gbl_root_table_list.

			       tables[acpi_gbl_fadt_index].address, length);

	if (!table) {

	fadt_desc = &acpi_gbl_root_table_list.tables[acpi_gbl_fadt_index];

	status = acpi_tb_get_table(fadt_desc, &table);

	if (ACPI_FAILURE(status)) {

		return;

	}

	length = fadt_desc->length;



	/*

	 * Validate the FADT checksum before we copy the table. Ignore
@@ -340,7 +340,7 @@ void acpi_tb_parse_fadt(void) 


	/* All done with the real FADT, unmap it */



	acpi_os_unmap_memory(table, length);

	acpi_tb_put_table(fadt_desc);



	/* Obtain the DSDT and FACS tables via their addresses within the FADT */

drivers/acpi/acpica/tbutils.c

+85 −0
Original line number Diff line number Diff line
@@ -381,3 +381,88 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address) 
	acpi_os_unmap_memory(table, length);

	return_ACPI_STATUS(AE_OK);

}



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

 *

 * FUNCTION:    acpi_tb_get_table

 *

 * PARAMETERS:  table_desc          - Table descriptor

 *              out_table           - Where the pointer to the table is returned

 *

 * RETURN:      Status and pointer to the requested table

 *

 * DESCRIPTION: Increase a reference to a table descriptor and return the

 *              validated table pointer.

 *              If the table descriptor is an entry of the root table list,

 *              this API must be invoked with ACPI_MTX_TABLES acquired.

 *

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



acpi_status

acpi_tb_get_table(struct acpi_table_desc *table_desc,

		  struct acpi_table_header **out_table)

{

	acpi_status status;



	ACPI_FUNCTION_TRACE(acpi_tb_get_table);



	if (table_desc->validation_count == 0) {



		/* Table need to be "VALIDATED" */



		status = acpi_tb_validate_table(table_desc);

		if (ACPI_FAILURE(status)) {

			return_ACPI_STATUS(status);

		}

	}



	table_desc->validation_count++;

	if (table_desc->validation_count == 0) {

		ACPI_ERROR((AE_INFO,

			    "Table %p, Validation count is zero after increment\n",

			    table_desc));

		table_desc->validation_count--;

		return_ACPI_STATUS(AE_LIMIT);

	}



	*out_table = table_desc->pointer;

	return_ACPI_STATUS(AE_OK);

}



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

 *

 * FUNCTION:    acpi_tb_put_table

 *

 * PARAMETERS:  table_desc          - Table descriptor

 *

 * RETURN:      None

 *

 * DESCRIPTION: Decrease a reference to a table descriptor and release the

 *              validated table pointer if no references.

 *              If the table descriptor is an entry of the root table list,

 *              this API must be invoked with ACPI_MTX_TABLES acquired.

 *

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



void acpi_tb_put_table(struct acpi_table_desc *table_desc)

{



	ACPI_FUNCTION_TRACE(acpi_tb_put_table);



	if (table_desc->validation_count == 0) {

		ACPI_WARNING((AE_INFO,

			      "Table %p, Validation count is zero before decrement\n",

			      table_desc));

		return_VOID;

	}

	table_desc->validation_count--;



	if (table_desc->validation_count == 0) {



		/* Table need to be "INVALIDATED" */



		acpi_tb_invalidate_table(table_desc);

	}



	return_VOID;

}