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-rw-r--r--drivers/misc/ibmasm/i2o.h63
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/misc/ibmasm/i2o.h b/drivers/misc/ibmasm/i2o.h
new file mode 100644
index 000000000..468fa84a3
--- /dev/null
+++ b/drivers/misc/ibmasm/i2o.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * IBM ASM Service Processor Device Driver
+ *
+ * Copyright (C) IBM Corporation, 2004
+ *
+ * Author: Max Asböck <amax@us.ibm.com>
+ */
+
+#pragma pack(1)
+struct i2o_header {
+ u8 version;
+ u8 message_flags;
+ u16 message_size;
+ u8 target;
+ u8 initiator_and_target;
+ u8 initiator;
+ u8 function;
+ u32 initiator_context;
+};
+#pragma pack()
+
+#define I2O_HEADER_TEMPLATE \
+ { .version = 0x01, \
+ .message_flags = 0x00, \
+ .function = 0xFF, \
+ .initiator = 0x00, \
+ .initiator_and_target = 0x40, \
+ .target = 0x00, \
+ .initiator_context = 0x0 }
+
+#define I2O_MESSAGE_SIZE 0x1000
+#define I2O_COMMAND_SIZE (I2O_MESSAGE_SIZE - sizeof(struct i2o_header))
+
+#pragma pack(1)
+struct i2o_message {
+ struct i2o_header header;
+ void *data;
+};
+#pragma pack()
+
+static inline unsigned short outgoing_message_size(unsigned int data_size)
+{
+ unsigned int size;
+ unsigned short i2o_size;
+
+ if (data_size > I2O_COMMAND_SIZE)
+ data_size = I2O_COMMAND_SIZE;
+
+ size = sizeof(struct i2o_header) + data_size;
+
+ i2o_size = size / sizeof(u32);
+
+ if (size % sizeof(u32))
+ i2o_size++;
+
+ return i2o_size;
+}
+
+static inline u32 incoming_data_size(struct i2o_message *i2o_message)
+{
+ return (sizeof(u32) * i2o_message->header.message_size);
+}