From 6557a49a443a347d24aed58076365432ded30edc Mon Sep 17 00:00:00 2001 From: Lin Ming Date: Wed, 24 Jun 2009 11:32:04 +0800 Subject: [PATCH] ACPICA: ACPI 4.0: Interpreter support for IPMI. Adds support for IPMI which is similar to SMBus and uses a bi-directional data buffer. ACPICA BZ 773. http://acpica.org/bugzilla/show_bug.cgi?id=773 Signed-off-by: Lin Ming Signed-off-by: Bob Moore Signed-off-by: Len Brown --- drivers/acpi/acpica/acconfig.h | 3 +- drivers/acpi/acpica/exfield.c | 82 +++++++++++++++++++++++----------- drivers/acpi/acpica/exfldio.c | 7 +-- include/acpi/actypes.h | 3 +- 4 files changed, 63 insertions(+), 32 deletions(-) diff --git a/drivers/acpi/acpica/acconfig.h b/drivers/acpi/acpica/acconfig.h index 9123d5a11627..8e679ef5b231 100644 --- a/drivers/acpi/acpica/acconfig.h +++ b/drivers/acpi/acpica/acconfig.h @@ -199,9 +199,10 @@ #define ACPI_RSDP_CHECKSUM_LENGTH 20 #define ACPI_RSDP_XCHECKSUM_LENGTH 36 -/* SMBus bidirectional buffer size */ +/* SMBus and IPMI bidirectional buffer size */ #define ACPI_SMBUS_BUFFER_SIZE 34 +#define ACPI_IPMI_BUFFER_SIZE 66 /* _sx_d and _sx_w control methods */ diff --git a/drivers/acpi/acpica/exfield.c b/drivers/acpi/acpica/exfield.c index 546dcdd86785..0b33d6c887b9 100644 --- a/drivers/acpi/acpica/exfield.c +++ b/drivers/acpi/acpica/exfield.c @@ -72,6 +72,7 @@ acpi_ex_read_data_from_field(struct acpi_walk_state *walk_state, union acpi_operand_object *buffer_desc; acpi_size length; void *buffer; + u32 function; ACPI_FUNCTION_TRACE_PTR(ex_read_data_from_field, obj_desc); @@ -97,13 +98,27 @@ acpi_ex_read_data_from_field(struct acpi_walk_state *walk_state, } } else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && (obj_desc->field.region_obj->region.space_id == - ACPI_ADR_SPACE_SMBUS)) { + ACPI_ADR_SPACE_SMBUS + || obj_desc->field.region_obj->region.space_id == + ACPI_ADR_SPACE_IPMI)) { /* - * This is an SMBus read. We must create a buffer to hold the data - * and directly access the region handler. + * This is an SMBus or IPMI read. We must create a buffer to hold + * the data and then directly access the region handler. + * + * Note: Smbus protocol value is passed in upper 16-bits of Function */ - buffer_desc = - acpi_ut_create_buffer_object(ACPI_SMBUS_BUFFER_SIZE); + if (obj_desc->field.region_obj->region.space_id == + ACPI_ADR_SPACE_SMBUS) { + length = ACPI_SMBUS_BUFFER_SIZE; + function = + ACPI_READ | (obj_desc->field.attribute << 16); + } else { /* IPMI */ + + length = ACPI_IPMI_BUFFER_SIZE; + function = ACPI_READ; + } + + buffer_desc = acpi_ut_create_buffer_object(length); if (!buffer_desc) { return_ACPI_STATUS(AE_NO_MEMORY); } @@ -112,16 +127,13 @@ acpi_ex_read_data_from_field(struct acpi_walk_state *walk_state, acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); - /* - * Perform the read. - * Note: Smbus protocol value is passed in upper 16-bits of Function - */ + /* Call the region handler for the read */ + status = acpi_ex_access_region(obj_desc, 0, ACPI_CAST_PTR(acpi_integer, buffer_desc-> buffer.pointer), - ACPI_READ | (obj_desc->field. - attribute << 16)); + function); acpi_ex_release_global_lock(obj_desc->common_field.field_flags); goto exit; } @@ -212,6 +224,7 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc, u32 length; void *buffer; union acpi_operand_object *buffer_desc; + u32 function; ACPI_FUNCTION_TRACE_PTR(ex_write_data_to_field, obj_desc); @@ -234,39 +247,56 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc, } } else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && (obj_desc->field.region_obj->region.space_id == - ACPI_ADR_SPACE_SMBUS)) { + ACPI_ADR_SPACE_SMBUS + || obj_desc->field.region_obj->region.space_id == + ACPI_ADR_SPACE_IPMI)) { /* - * This is an SMBus write. We will bypass the entire field mechanism - * and handoff the buffer directly to the handler. + * This is an SMBus or IPMI write. We will bypass the entire field + * mechanism and handoff the buffer directly to the handler. For + * these address spaces, the buffer is bi-directional; on a write, + * return data is returned in the same buffer. * - * Source must be a buffer of sufficient size (ACPI_SMBUS_BUFFER_SIZE). + * Source must be a buffer of sufficient size: + * ACPI_SMBUS_BUFFER_SIZE or ACPI_IPMI_BUFFER_SIZE. + * + * Note: SMBus protocol type is passed in upper 16-bits of Function */ if (source_desc->common.type != ACPI_TYPE_BUFFER) { ACPI_ERROR((AE_INFO, - "SMBus write requires Buffer, found type %s", + "SMBus or IPMI write requires Buffer, found type %s", acpi_ut_get_object_type_name(source_desc))); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } - if (source_desc->buffer.length < ACPI_SMBUS_BUFFER_SIZE) { + if (obj_desc->field.region_obj->region.space_id == + ACPI_ADR_SPACE_SMBUS) { + length = ACPI_SMBUS_BUFFER_SIZE; + function = + ACPI_WRITE | (obj_desc->field.attribute << 16); + } else { /* IPMI */ + + length = ACPI_IPMI_BUFFER_SIZE; + function = ACPI_WRITE; + } + + if (source_desc->buffer.length < length) { ACPI_ERROR((AE_INFO, - "SMBus write requires Buffer of length %X, found length %X", - ACPI_SMBUS_BUFFER_SIZE, - source_desc->buffer.length)); + "SMBus or IPMI write requires Buffer of length %X, found length %X", + length, source_desc->buffer.length)); return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); } - buffer_desc = - acpi_ut_create_buffer_object(ACPI_SMBUS_BUFFER_SIZE); + /* Create the bi-directional buffer */ + + buffer_desc = acpi_ut_create_buffer_object(length); if (!buffer_desc) { return_ACPI_STATUS(AE_NO_MEMORY); } buffer = buffer_desc->buffer.pointer; - ACPI_MEMCPY(buffer, source_desc->buffer.pointer, - ACPI_SMBUS_BUFFER_SIZE); + ACPI_MEMCPY(buffer, source_desc->buffer.pointer, length); /* Lock entire transaction if requested */ @@ -275,12 +305,10 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc, /* * Perform the write (returns status and perhaps data in the * same buffer) - * Note: SMBus protocol type is passed in upper 16-bits of Function. */ status = acpi_ex_access_region(obj_desc, 0, (acpi_integer *) buffer, - ACPI_WRITE | (obj_desc->field. - attribute << 16)); + function); acpi_ex_release_global_lock(obj_desc->common_field.field_flags); *result_desc = buffer_desc; diff --git a/drivers/acpi/acpica/exfldio.c b/drivers/acpi/acpica/exfldio.c index 6687be167f5f..d7b3b418fb45 100644 --- a/drivers/acpi/acpica/exfldio.c +++ b/drivers/acpi/acpica/exfldio.c @@ -120,12 +120,13 @@ acpi_ex_setup_region(union acpi_operand_object *obj_desc, } /* - * Exit now for SMBus address space, it has a non-linear address space + * 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) { + if (rgn_desc->region.space_id == ACPI_ADR_SPACE_SMBUS || + rgn_desc->region.space_id == ACPI_ADR_SPACE_IPMI) { - /* SMBus has a non-linear address space */ + /* SMBus or IPMI has a non-linear address space */ return_ACPI_STATUS(AE_OK); } diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 7a4ff79e238c..4371805d2def 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -732,7 +732,8 @@ typedef u8 acpi_adr_space_type; #define ACPI_ADR_SPACE_SMBUS (acpi_adr_space_type) 4 #define ACPI_ADR_SPACE_CMOS (acpi_adr_space_type) 5 #define ACPI_ADR_SPACE_PCI_BAR_TARGET (acpi_adr_space_type) 6 -#define ACPI_ADR_SPACE_DATA_TABLE (acpi_adr_space_type) 7 +#define ACPI_ADR_SPACE_IPMI (acpi_adr_space_type) 7 +#define ACPI_ADR_SPACE_DATA_TABLE (acpi_adr_space_type) 8 #define ACPI_ADR_SPACE_FIXED_HARDWARE (acpi_adr_space_type) 127 /*