From: Bob Moore <robert.moore@xxxxxxxxx> This reverts commit f23b9c7(http://git.moblin.org/cgit.cgi/acpica/commit/?id=f23b9c7) The problem with this change was determined to be a problem with the FreeBSD host OSL (OS services layer), not with this patch itself. Therefore, re-introducing this change into the main ACPICA code. See ACPICA bugzilla 863. http://www.acpica.org/bugzilla/show_bug.cgi?id=863 Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx> Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx> Signed-off-by: Len Brown <len.brown@xxxxxxxxx> --- drivers/acpi/acpica/acobject.h | 2 +- drivers/acpi/acpica/exfldio.c | 75 ++++++++++++++++++++++++++------------- drivers/acpi/acpica/exprep.c | 45 ++++++++++++------------ 3 files changed, 73 insertions(+), 49 deletions(-) diff --git a/drivers/acpi/acpica/acobject.h b/drivers/acpi/acpica/acobject.h index 54857fa..bdbfaf2 100644 --- a/drivers/acpi/acpica/acobject.h +++ b/drivers/acpi/acpica/acobject.h @@ -248,7 +248,7 @@ ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO}; u32 base_byte_offset; /* Byte offset within containing object */\ u32 value; /* Value to store into the Bank or Index register */\ u8 start_field_bit_offset;/* Bit offset within first field datum (0-63) */\ - u8 access_bit_width; /* Read/Write size in bits (8-64) */ + struct acpi_object_field_common { /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */ ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Parent Operation Region object (REGION/BANK fields only) */ diff --git a/drivers/acpi/acpica/exfldio.c b/drivers/acpi/acpica/exfldio.c index 0472173..38293fd 100644 --- a/drivers/acpi/acpica/exfldio.c +++ b/drivers/acpi/acpica/exfldio.c @@ -119,8 +119,8 @@ acpi_ex_setup_region(union acpi_operand_object *obj_desc, } /* - * Exit now for SMBus or IPMI address space, it has a non-linear address space - * and the request cannot be directly validated + * Exit now for SMBus or IPMI address space, it has a non-linear + * address space and the request cannot be directly validated */ if (rgn_desc->region.space_id == ACPI_ADR_SPACE_SMBUS || rgn_desc->region.space_id == ACPI_ADR_SPACE_IPMI) { @@ -147,8 +147,7 @@ acpi_ex_setup_region(union acpi_operand_object *obj_desc, * (Region length is specified in bytes) */ if (rgn_desc->region.length < - (obj_desc->common_field.base_byte_offset + - field_datum_byte_offset + + (obj_desc->common_field.base_byte_offset + field_datum_byte_offset + obj_desc->common_field.access_byte_width)) { if (acpi_gbl_enable_interpreter_slack) { /* @@ -680,6 +679,7 @@ acpi_ex_extract_from_field(union acpi_operand_object *obj_desc, u32 buffer_tail_bits; u32 datum_count; u32 field_datum_count; + u32 access_bit_width; u32 i; ACPI_FUNCTION_TRACE(ex_extract_from_field); @@ -694,16 +694,36 @@ acpi_ex_extract_from_field(union acpi_operand_object *obj_desc, return_ACPI_STATUS(AE_BUFFER_OVERFLOW); } + ACPI_MEMSET(buffer, 0, buffer_length); + access_bit_width = ACPI_MUL_8(obj_desc->common_field.access_byte_width); + + /* Handle the simple case here */ + + if ((obj_desc->common_field.start_field_bit_offset == 0) && + (obj_desc->common_field.bit_length == access_bit_width)) { + status = acpi_ex_field_datum_io(obj_desc, 0, buffer, ACPI_READ); + return_ACPI_STATUS(status); + } + +/* TBD: Move to common setup code */ + + /* Field algorithm is limited to sizeof(u64), truncate if needed */ + + if (obj_desc->common_field.access_byte_width > sizeof(u64)) { + obj_desc->common_field.access_byte_width = sizeof(u64); + access_bit_width = sizeof(u64) * 8; + } /* Compute the number of datums (access width data items) */ - datum_count = ACPI_ROUND_UP_TO(obj_desc->common_field.bit_length, - obj_desc->common_field.access_bit_width); + datum_count = + ACPI_ROUND_UP_TO(obj_desc->common_field.bit_length, + access_bit_width); + field_datum_count = ACPI_ROUND_UP_TO(obj_desc->common_field.bit_length + obj_desc->common_field. start_field_bit_offset, - obj_desc->common_field. access_bit_width); /* Priming read from the field */ @@ -738,12 +758,11 @@ acpi_ex_extract_from_field(union acpi_operand_object *obj_desc, * This avoids the differences in behavior between different compilers * concerning shift values larger than the target data width. */ - if ((obj_desc->common_field.access_bit_width - - obj_desc->common_field.start_field_bit_offset) < + if (access_bit_width - + obj_desc->common_field.start_field_bit_offset < ACPI_INTEGER_BIT_SIZE) { merged_datum |= - raw_datum << (obj_desc->common_field. - access_bit_width - + raw_datum << (access_bit_width - obj_desc->common_field. start_field_bit_offset); } @@ -765,8 +784,7 @@ acpi_ex_extract_from_field(union acpi_operand_object *obj_desc, /* Mask off any extra bits in the last datum */ - buffer_tail_bits = obj_desc->common_field.bit_length % - obj_desc->common_field.access_bit_width; + buffer_tail_bits = obj_desc->common_field.bit_length % access_bit_width; if (buffer_tail_bits) { merged_datum &= ACPI_MASK_BITS_ABOVE(buffer_tail_bits); } @@ -798,6 +816,7 @@ acpi_status acpi_ex_insert_into_field(union acpi_operand_object *obj_desc, void *buffer, u32 buffer_length) { + void *new_buffer; acpi_status status; u64 mask; u64 width_mask; @@ -808,9 +827,9 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc, u32 buffer_tail_bits; u32 datum_count; u32 field_datum_count; - u32 i; + u32 access_bit_width; u32 required_length; - void *new_buffer; + u32 i; ACPI_FUNCTION_TRACE(ex_insert_into_field); @@ -844,17 +863,24 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc, buffer_length = required_length; } +/* TBD: Move to common setup code */ + + /* Algo is limited to sizeof(u64), so cut the access_byte_width */ + if (obj_desc->common_field.access_byte_width > sizeof(u64)) { + obj_desc->common_field.access_byte_width = sizeof(u64); + } + + access_bit_width = ACPI_MUL_8(obj_desc->common_field.access_byte_width); + /* * Create the bitmasks used for bit insertion. * Note: This if/else is used to bypass compiler differences with the * shift operator */ - if (obj_desc->common_field.access_bit_width == ACPI_INTEGER_BIT_SIZE) { + if (access_bit_width == ACPI_INTEGER_BIT_SIZE) { width_mask = ACPI_UINT64_MAX; } else { - width_mask = - ACPI_MASK_BITS_ABOVE(obj_desc->common_field. - access_bit_width); + width_mask = ACPI_MASK_BITS_ABOVE(access_bit_width); } mask = width_mask & @@ -863,12 +889,11 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc, /* Compute the number of datums (access width data items) */ datum_count = ACPI_ROUND_UP_TO(obj_desc->common_field.bit_length, - obj_desc->common_field.access_bit_width); + access_bit_width); field_datum_count = ACPI_ROUND_UP_TO(obj_desc->common_field.bit_length + obj_desc->common_field. start_field_bit_offset, - obj_desc->common_field. access_bit_width); /* Get initial Datum from the input buffer */ @@ -905,12 +930,11 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc, * This avoids the differences in behavior between different compilers * concerning shift values larger than the target data width. */ - if ((obj_desc->common_field.access_bit_width - + if ((access_bit_width - obj_desc->common_field.start_field_bit_offset) < ACPI_INTEGER_BIT_SIZE) { merged_datum = - raw_datum >> (obj_desc->common_field. - access_bit_width - + raw_datum >> (access_bit_width - obj_desc->common_field. start_field_bit_offset); } else { @@ -929,6 +953,7 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc, ACPI_MEMCPY(&raw_datum, ((char *)buffer) + buffer_offset, ACPI_MIN(obj_desc->common_field.access_byte_width, buffer_length - buffer_offset)); + merged_datum |= raw_datum << obj_desc->common_field.start_field_bit_offset; } @@ -937,7 +962,7 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc, buffer_tail_bits = (obj_desc->common_field.bit_length + obj_desc->common_field.start_field_bit_offset) % - obj_desc->common_field.access_bit_width; + access_bit_width; if (buffer_tail_bits) { mask &= ACPI_MASK_BITS_ABOVE(buffer_tail_bits); } diff --git a/drivers/acpi/acpica/exprep.c b/drivers/acpi/acpica/exprep.c index 98a331d..7aae29f 100644 --- a/drivers/acpi/acpica/exprep.c +++ b/drivers/acpi/acpica/exprep.c @@ -355,12 +355,10 @@ acpi_ex_prep_common_field_object(union acpi_operand_object *obj_desc, return_ACPI_STATUS(AE_AML_OPERAND_VALUE); } - /* Setup width (access granularity) fields */ + /* Setup width (access granularity) fields (values are: 1, 2, 4, 8) */ obj_desc->common_field.access_byte_width = (u8) - ACPI_DIV_8(access_bit_width); /* 1, 2, 4, 8 */ - - obj_desc->common_field.access_bit_width = (u8) access_bit_width; + ACPI_DIV_8(access_bit_width); /* * base_byte_offset is the address of the start of the field within the @@ -405,8 +403,9 @@ acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info) { union acpi_operand_object *obj_desc; union acpi_operand_object *second_desc = NULL; - u32 type; acpi_status status; + u32 access_byte_width; + u32 type; ACPI_FUNCTION_TRACE(ex_prep_field_value); @@ -421,8 +420,8 @@ acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info) type = acpi_ns_get_type(info->region_node); if (type != ACPI_TYPE_REGION) { ACPI_ERROR((AE_INFO, - "Needed Region, found type 0x%X (%s)", - type, acpi_ut_get_type_name(type))); + "Needed Region, found type 0x%X (%s)", type, + acpi_ut_get_type_name(type))); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } @@ -438,7 +437,8 @@ acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info) /* Initialize areas of the object that are common to all fields */ obj_desc->common_field.node = info->field_node; - status = acpi_ex_prep_common_field_object(obj_desc, info->field_flags, + status = acpi_ex_prep_common_field_object(obj_desc, + info->field_flags, info->attribute, info->field_bit_position, info->field_bit_length); @@ -455,26 +455,25 @@ acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info) obj_desc->field.region_obj = acpi_ns_get_attached_object(info->region_node); - /* An additional reference for the container */ + /* Allow full data read from EC address space */ - acpi_ut_add_reference(obj_desc->field.region_obj); + if ((obj_desc->field.region_obj->region.space_id == + ACPI_ADR_SPACE_EC) + && (obj_desc->common_field.bit_length > 8)) { + access_byte_width = + ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field. + bit_length); + + /* Maximum byte width supported is 255 */ - /* allow full data read from EC address space */ - if (obj_desc->field.region_obj->region.space_id == - ACPI_ADR_SPACE_EC) { - if (obj_desc->common_field.bit_length > 8) { - unsigned width = - ACPI_ROUND_BITS_UP_TO_BYTES( - obj_desc->common_field.bit_length); - // access_bit_width is u8, don't overflow it - if (width > 8) - width = 8; + if (access_byte_width < 256) { obj_desc->common_field.access_byte_width = - width; - obj_desc->common_field.access_bit_width = - 8 * width; + (u8)access_byte_width; } } + /* An additional reference for the container */ + + acpi_ut_add_reference(obj_desc->field.region_obj); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "RegionField: BitOff %X, Off %X, Gran %X, Region %p\n", -- 1.7.3.2.90.gd4c43 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
