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ACPICA: Introduce acpi_hw_gpe_read() and acpi_hw_gpe_write() 

Now that GPE blocks are validated at the initialization time, accesses
to GPE registers can be made more straightforward by ommitting all of
the redundant checks in acpi_hw_read() and acpi_hw_write() and only
invoking the OS-provided helper for the given type of access (read or
write) and the address space holding these registers.

For this reason, introduce simplified routines for accessing GPE
registers, acpi_hw_gpe_read() and acpi_hw_gpe_write(), designed in
accordance with the above observation, and modify all of the code
accessing GPE registers to use them instead of acpi_hw_read() and
acpi_hw_write(), respectively.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2020-09-04 18:27:43 +02:00
Родитель 84b43284af
Коммит f06011ad62
4 изменённых файлов: 84 добавлений и 20 удалений
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4
drivers/acpi/acpica/achware.h
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@ -78,6 +78,10 @@ acpi_status acpi_hw_validate_io_block(u64 address, u32 bit_width, u32 count);
/*
* hwgpe - GPE support
*/
acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_generic_address *reg);
acpi_status acpi_hw_gpe_write(u64 value, struct acpi_generic_address *reg);
u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info);
acpi_status

4
drivers/acpi/acpica/evgpe.c
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@ -656,14 +656,14 @@ acpi_ev_detect_gpe(struct acpi_namespace_node *gpe_device,
/* GPE currently enabled (enable bit == 1)? */
status = acpi_hw_read(&enable_reg, &gpe_register_info->enable_address);
status = acpi_hw_gpe_read(&enable_reg, &gpe_register_info->enable_address);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
/* GPE currently active (status bit == 1)? */
status = acpi_hw_read(&status_reg, &gpe_register_info->status_address);
status = acpi_hw_gpe_read(&status_reg, &gpe_register_info->status_address);
if (ACPI_FAILURE(status)) {
goto error_exit;
}

4
drivers/acpi/acpica/evgpeblk.c
Просмотреть файл

@ -251,14 +251,14 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
/* Disable all GPEs within this register */
status = acpi_hw_write(0x00, &this_register->enable_address);
status = acpi_hw_gpe_write(0x00, &this_register->enable_address);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
/* Clear any pending GPE events within this register */
status = acpi_hw_write(0xFF, &this_register->status_address);
status = acpi_hw_gpe_write(0xFF, &this_register->status_address);
if (ACPI_FAILURE(status)) {
goto error_exit;
}

92
drivers/acpi/acpica/hwgpe.c
Просмотреть файл

@ -24,6 +24,66 @@ static acpi_status
acpi_hw_gpe_enable_write(u8 enable_mask,
struct acpi_gpe_register_info *gpe_register_info);
/******************************************************************************
*
* FUNCTION: acpi_hw_gpe_read
*
* PARAMETERS: value - Where the value is returned
* reg - GAS register structure
*
* RETURN: Status
*
* DESCRIPTION: Read from a GPE register in either memory or IO space.
*
* LIMITATIONS: <These limitations also apply to acpi_hw_gpe_write>
* space_ID must be system_memory or system_IO.
*
******************************************************************************/
acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_generic_address *reg)
{
acpi_status status;
u32 value32;
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
return acpi_os_read_memory((acpi_physical_address)reg->address,
value, ACPI_GPE_REGISTER_WIDTH);
}
status = acpi_os_read_port((acpi_io_address)reg->address,
&value32, ACPI_GPE_REGISTER_WIDTH);
if (ACPI_FAILURE(status))
return_ACPI_STATUS(status);
*value = (u64)value32;
return_ACPI_STATUS(AE_OK);
}
/******************************************************************************
*
* FUNCTION: acpi_hw_gpe_write
*
* PARAMETERS: value - Value to be written
* reg - GAS register structure
*
* RETURN: Status
*
* DESCRIPTION: Write to a GPE register in either memory or IO space.
*
******************************************************************************/
acpi_status acpi_hw_gpe_write(u64 value, struct acpi_generic_address *reg)
{
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
return acpi_os_write_memory((acpi_physical_address)reg->address,
value, ACPI_GPE_REGISTER_WIDTH);
}
return acpi_os_write_port((acpi_io_address)reg->address, (u32)value,
ACPI_GPE_REGISTER_WIDTH);
}
/******************************************************************************
*
* FUNCTION: acpi_hw_get_gpe_register_bit
@ -79,7 +139,8 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
/* Get current value of the enable register that contains this GPE */
status = acpi_hw_read(&enable_mask, &gpe_register_info->enable_address);
status = acpi_hw_gpe_read(&enable_mask,
&gpe_register_info->enable_address);
if (ACPI_FAILURE(status)) {
return (status);
}
@ -118,9 +179,8 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
/* Write the updated enable mask */
status =
acpi_hw_write(enable_mask,
&gpe_register_info->enable_address);
status = acpi_hw_gpe_write(enable_mask,
&gpe_register_info->enable_address);
}
return (status);
}
@ -158,8 +218,8 @@ acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info *gpe_event_info)
*/
register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
status =
acpi_hw_write(register_bit, &gpe_register_info->status_address);
status = acpi_hw_gpe_write(register_bit,
&gpe_register_info->status_address);
return (status);
}
@ -227,7 +287,7 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
/* GPE currently enabled (enable bit == 1)? */
status = acpi_hw_read(&in_byte, &gpe_register_info->enable_address);
status = acpi_hw_gpe_read(&in_byte, &gpe_register_info->enable_address);
if (ACPI_FAILURE(status)) {
return (status);
}
@ -238,7 +298,7 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
/* GPE currently active (status bit == 1)? */
status = acpi_hw_read(&in_byte, &gpe_register_info->status_address);
status = acpi_hw_gpe_read(&in_byte, &gpe_register_info->status_address);
if (ACPI_FAILURE(status)) {
return (status);
}
@ -274,7 +334,8 @@ acpi_hw_gpe_enable_write(u8 enable_mask,
gpe_register_info->enable_mask = enable_mask;
status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address);
status = acpi_hw_gpe_write(enable_mask,
&gpe_register_info->enable_address);
return (status);
}
@ -341,9 +402,8 @@ acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
/* Clear status on all GPEs in this register */
status =
acpi_hw_write(0xFF,
&gpe_block->register_info[i].status_address);
status = acpi_hw_gpe_write(0xFF,
&gpe_block->register_info[i].status_address);
if (ACPI_FAILURE(status)) {
return (status);
}
@ -481,14 +541,14 @@ acpi_hw_get_gpe_block_status(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
for (i = 0; i < gpe_block->register_count; i++) {
gpe_register_info = &gpe_block->register_info[i];
status = acpi_hw_read(&in_enable,
&gpe_register_info->enable_address);
status = acpi_hw_gpe_read(&in_enable,
&gpe_register_info->enable_address);
if (ACPI_FAILURE(status)) {
continue;
}
status = acpi_hw_read(&in_status,
&gpe_register_info->status_address);
status = acpi_hw_gpe_read(&in_status,
&gpe_register_info->status_address);
if (ACPI_FAILURE(status)) {
continue;
}