ACPICA: Update for field unit access

Mostly for access to Generic Serial Bus, but also cleanup
for the other fields.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 13 insertions, 5 deletions

diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h
index 0f875ae68c68..53c088247d36 100644
--- a/include/acpi/acconfig.h
+++ b/include/acpi/acconfig.h
@@ -173,12 +173,20 @@
 #define ACPI_RSDP_CHECKSUM_LENGTH       20
 #define ACPI_RSDP_XCHECKSUM_LENGTH      36
 
-/* SMBus, GSBus and IPMI bidirectional buffer size */
+/*
+ * SMBus, GSBus and IPMI buffer sizes. All have a 2-byte header,
+ * containing both Status and Length.
+ */
+#define ACPI_SERIAL_HEADER_SIZE         2	/* Common for below. Status and Length fields */
+
+#define ACPI_SMBUS_DATA_SIZE            32
+#define ACPI_SMBUS_BUFFER_SIZE          ACPI_SERIAL_HEADER_SIZE + ACPI_SMBUS_DATA_SIZE
+
+#define ACPI_IPMI_DATA_SIZE             64
+#define ACPI_IPMI_BUFFER_SIZE           ACPI_SERIAL_HEADER_SIZE + ACPI_IPMI_DATA_SIZE
 
-#define ACPI_SMBUS_BUFFER_SIZE          34
-#define ACPI_IPMI_BUFFER_SIZE           66
-#define ACPI_GSBUS_BUFFER_SIZE          34	/* Not clear if this is needed */
-#define ACPI_MAX_GSBUS_BUFFER_SIZE      255	/* Worst-case bidirectional buffer */
+#define ACPI_MAX_GSBUS_DATA_SIZE        255
+#define ACPI_MAX_GSBUS_BUFFER_SIZE      ACPI_SERIAL_HEADER_SIZE + ACPI_MAX_GSBUS_DATA_SIZE
 
 /* _sx_d and _sx_w control methods */