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kernel/linux-imx6_3.14.28/drivers/misc/ibmasm/i2o.h 1.95 KB
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  /*
   * IBM ASM Service Processor Device Driver
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
   *
   * 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);
  }