diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/misc/ibmasm/i2o.h | 63 |
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); +} |