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ACPICA: Hardware: Enable 64-bit support of hardware accesses
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ACPICA commit 6b0a604d171334f61a18bc92b44ec0437b11bf98

This patch enable 64-bit support for acpi_hw_read()/acpi_hw_write() and
then convert acpi_read()/acpi_write() to invoke them. BZ 1287, fixed by
Lv Zheng.

Link: https://github.com/acpica/acpica/commit/6b0a604d1713
Link: https://bugs.acpica.org/show_bug.cgi?id=1287
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Lv Zheng authored and Rafael J. Wysocki committed Oct 3, 2017
1 parent 9e66317 commit 8381c54
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Showing 5 changed files with 49 additions and 155 deletions.
4 changes: 2 additions & 2 deletions drivers/acpi/acpica/achware.h
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Original file line number Diff line number Diff line change
Expand Up @@ -66,9 +66,9 @@ acpi_status
acpi_hw_validate_register(struct acpi_generic_address *reg,
u8 max_bit_width, u64 *address);

acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg);
acpi_status acpi_hw_read(u64 *value, struct acpi_generic_address *reg);

acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg);
acpi_status acpi_hw_write(u64 value, struct acpi_generic_address *reg);

struct acpi_bit_register_info *acpi_hw_get_bit_register_info(u32 register_id);

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6 changes: 3 additions & 3 deletions drivers/acpi/acpica/evgpe.c
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Original file line number Diff line number Diff line change
Expand Up @@ -390,8 +390,8 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
struct acpi_gpe_handler_info *gpe_handler_info;
u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
u8 enabled_status_byte;
u32 status_reg;
u32 enable_reg;
u64 status_reg;
u64 enable_reg;
acpi_cpu_flags flags;
u32 i;
u32 j;
Expand Down Expand Up @@ -472,7 +472,7 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
gpe_register_info->base_gpe_number,
gpe_register_info->base_gpe_number +
(ACPI_GPE_REGISTER_WIDTH - 1),
status_reg, enable_reg,
(u32)status_reg, (u32)enable_reg,
gpe_register_info->enable_for_run,
gpe_register_info->enable_for_wake));

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4 changes: 2 additions & 2 deletions drivers/acpi/acpica/hwgpe.c
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Original file line number Diff line number Diff line change
Expand Up @@ -99,7 +99,7 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
{
struct acpi_gpe_register_info *gpe_register_info;
acpi_status status = AE_OK;
u32 enable_mask;
u64 enable_mask;
u32 register_bit;

ACPI_FUNCTION_ENTRY();
Expand Down Expand Up @@ -214,7 +214,7 @@ acpi_status
acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
acpi_event_status *event_status)
{
u32 in_byte;
u64 in_byte;
u32 register_bit;
struct acpi_gpe_register_info *gpe_register_info;
acpi_event_status local_event_status = 0;
Expand Down
72 changes: 39 additions & 33 deletions drivers/acpi/acpica/hwregs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -220,16 +220,15 @@ acpi_hw_validate_register(struct acpi_generic_address *reg,
*
* RETURN: Status
*
* DESCRIPTION: Read from either memory or IO space. This is a 32-bit max
* version of acpi_read, used internally since the overhead of
* 64-bit values is not needed.
* DESCRIPTION: Read from either memory or IO space. This is a 64-bit max
* version of acpi_read.
*
* LIMITATIONS: <These limitations also apply to acpi_hw_write>
* space_ID must be system_memory or system_IO.
*
******************************************************************************/

acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
acpi_status acpi_hw_read(u64 *value, struct acpi_generic_address *reg)
{
u64 address;
u8 access_width;
Expand All @@ -244,17 +243,17 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)

/* Validate contents of the GAS register */

status = acpi_hw_validate_register(reg, 32, &address);
status = acpi_hw_validate_register(reg, 64, &address);
if (ACPI_FAILURE(status)) {
return (status);
}

/*
* Initialize entire 32-bit return value to zero, convert access_width
* Initialize entire 64-bit return value to zero, convert access_width
* into number of bits based
*/
*value = 0;
access_width = acpi_hw_get_access_bit_width(address, reg, 32);
access_width = acpi_hw_get_access_bit_width(address, reg, 64);
bit_width = reg->bit_offset + reg->bit_width;
bit_offset = reg->bit_offset;

Expand All @@ -265,7 +264,7 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
index = 0;
while (bit_width) {
if (bit_offset >= access_width) {
value32 = 0;
value64 = 0;
bit_offset -= access_width;
} else {
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
Expand All @@ -276,7 +275,6 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
ACPI_DIV_8
(access_width),
&value64, access_width);
value32 = (u32)value64;
} else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */

status = acpi_hw_read_port((acpi_io_address)
Expand All @@ -286,24 +284,26 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
(access_width),
&value32,
access_width);
value64 = (u64)value32;
}
}

/*
* Use offset style bit writes because "Index * AccessWidth" is
* ensured to be less than 32-bits by acpi_hw_validate_register().
* ensured to be less than 64-bits by acpi_hw_validate_register().
*/
ACPI_SET_BITS(value, index * access_width,
ACPI_MASK_BITS_ABOVE_32(access_width), value32);
ACPI_MASK_BITS_ABOVE_64(access_width), value64);

bit_width -=
bit_width > access_width ? access_width : bit_width;
index++;
}

ACPI_DEBUG_PRINT((ACPI_DB_IO,
"Read: %8.8X width %2d from %8.8X%8.8X (%s)\n",
*value, access_width, ACPI_FORMAT_UINT64(address),
"Read: %8.8X%8.8X width %2d from %8.8X%8.8X (%s)\n",
ACPI_FORMAT_UINT64(*value), access_width,
ACPI_FORMAT_UINT64(address),
acpi_ut_get_region_name(reg->space_id)));

return (status);
Expand All @@ -318,35 +318,33 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
*
* RETURN: Status
*
* DESCRIPTION: Write to either memory or IO space. This is a 32-bit max
* version of acpi_write, used internally since the overhead of
* 64-bit values is not needed.
* DESCRIPTION: Write to either memory or IO space. This is a 64-bit max
* version of acpi_write.
*
******************************************************************************/

acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg)
acpi_status acpi_hw_write(u64 value, struct acpi_generic_address *reg)
{
u64 address;
u8 access_width;
u32 bit_width;
u8 bit_offset;
u64 value64;
u32 value32;
u8 index;
acpi_status status;

ACPI_FUNCTION_NAME(hw_write);

/* Validate contents of the GAS register */

status = acpi_hw_validate_register(reg, 32, &address);
status = acpi_hw_validate_register(reg, 64, &address);
if (ACPI_FAILURE(status)) {
return (status);
}

/* Convert access_width into number of bits based */

access_width = acpi_hw_get_access_bit_width(address, reg, 32);
access_width = acpi_hw_get_access_bit_width(address, reg, 64);
bit_width = reg->bit_offset + reg->bit_width;
bit_offset = reg->bit_offset;

Expand All @@ -358,16 +356,15 @@ acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg)
while (bit_width) {
/*
* Use offset style bit reads because "Index * AccessWidth" is
* ensured to be less than 32-bits by acpi_hw_validate_register().
* ensured to be less than 64-bits by acpi_hw_validate_register().
*/
value32 = ACPI_GET_BITS(&value, index * access_width,
ACPI_MASK_BITS_ABOVE_32(access_width));
value64 = ACPI_GET_BITS(&value, index * access_width,
ACPI_MASK_BITS_ABOVE_64(access_width));

if (bit_offset >= access_width) {
bit_offset -= access_width;
} else {
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
value64 = (u64)value32;
status =
acpi_os_write_memory((acpi_physical_address)
address +
Expand All @@ -382,7 +379,7 @@ acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg)
index *
ACPI_DIV_8
(access_width),
value32,
(u32)value64,
access_width);
}
}
Expand All @@ -397,8 +394,9 @@ acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg)
}

ACPI_DEBUG_PRINT((ACPI_DB_IO,
"Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n",
value, access_width, ACPI_FORMAT_UINT64(address),
"Wrote: %8.8X%8.8X width %2d to %8.8X%8.8X (%s)\n",
ACPI_FORMAT_UINT64(value), access_width,
ACPI_FORMAT_UINT64(address),
acpi_ut_get_region_name(reg->space_id)));

return (status);
Expand Down Expand Up @@ -526,6 +524,7 @@ acpi_status acpi_hw_write_pm1_control(u32 pm1a_control, u32 pm1b_control)
acpi_status acpi_hw_register_read(u32 register_id, u32 *return_value)
{
u32 value = 0;
u64 value64;
acpi_status status;

ACPI_FUNCTION_TRACE(hw_register_read);
Expand Down Expand Up @@ -564,12 +563,14 @@ acpi_status acpi_hw_register_read(u32 register_id, u32 *return_value)
case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */

status =
acpi_hw_read(&value, &acpi_gbl_FADT.xpm2_control_block);
acpi_hw_read(&value64, &acpi_gbl_FADT.xpm2_control_block);
value = (u32)value64;
break;

case ACPI_REGISTER_PM_TIMER: /* 32-bit access */

status = acpi_hw_read(&value, &acpi_gbl_FADT.xpm_timer_block);
status = acpi_hw_read(&value64, &acpi_gbl_FADT.xpm_timer_block);
value = (u32)value64;
break;

case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */
Expand All @@ -586,7 +587,7 @@ acpi_status acpi_hw_register_read(u32 register_id, u32 *return_value)
}

if (ACPI_SUCCESS(status)) {
*return_value = value;
*return_value = (u32)value;
}

return_ACPI_STATUS(status);
Expand Down Expand Up @@ -622,6 +623,7 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value)
{
acpi_status status;
u32 read_value;
u64 read_value64;

ACPI_FUNCTION_TRACE(hw_register_write);

Expand Down Expand Up @@ -685,11 +687,12 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value)
* as per the ACPI spec.
*/
status =
acpi_hw_read(&read_value,
acpi_hw_read(&read_value64,
&acpi_gbl_FADT.xpm2_control_block);
if (ACPI_FAILURE(status)) {
goto exit;
}
read_value = (u32)read_value64;

/* Insert the bits to be preserved */

Expand Down Expand Up @@ -745,22 +748,25 @@ acpi_hw_read_multiple(u32 *value,
{
u32 value_a = 0;
u32 value_b = 0;
u64 value64;
acpi_status status;

/* The first register is always required */

status = acpi_hw_read(&value_a, register_a);
status = acpi_hw_read(&value64, register_a);
if (ACPI_FAILURE(status)) {
return (status);
}
value_a = (u32)value64;

/* Second register is optional */

if (register_b->address) {
status = acpi_hw_read(&value_b, register_b);
status = acpi_hw_read(&value64, register_b);
if (ACPI_FAILURE(status)) {
return (status);
}
value_b = (u32)value64;
}

/*
Expand Down
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