/*
   * Derived from include/asm-powerpc/iommu.h
   *

   * Copyright IBM Corporation, 2006-2007

   *
   * Author: Jon Mason <jdmason@us.ibm.com>
   * Author: Muli Ben-Yehuda <muli@il.ibm.com>

   *
   * 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
   */
  
  #ifndef _ASM_X86_64_CALGARY_H
  #define _ASM_X86_64_CALGARY_H

  #include <linux/spinlock.h>
  #include <linux/device.h>
  #include <linux/dma-mapping.h>

  #include <linux/timer.h>

  #include <asm/types.h>
  
  struct iommu_table {

  	struct cal_chipset_ops *chip_ops; /* chipset specific funcs */

  	unsigned long  it_base;      /* mapped address of tce table */
  	unsigned long  it_hint;      /* Hint for next alloc */
  	unsigned long *it_map;       /* A simple allocation bitmap for now */

  	void __iomem  *bbar;         /* Bridge BAR */
  	u64	       tar_val;      /* Table Address Register */
  	struct timer_list watchdog_timer;

  	spinlock_t     it_lock;      /* Protects it_map */
  	unsigned int   it_size;      /* Size of iommu table in entries */
  	unsigned char  it_busno;     /* Bus number this table belongs to */

  };

  struct cal_chipset_ops {
  	void (*handle_quirks)(struct iommu_table *tbl, struct pci_dev *dev);
  	void (*tce_cache_blast)(struct iommu_table *tbl);

  	void (*dump_error_regs)(struct iommu_table *tbl);

  };

  #define TCE_TABLE_SIZE_UNSPECIFIED	~0
  #define TCE_TABLE_SIZE_64K		0
  #define TCE_TABLE_SIZE_128K		1
  #define TCE_TABLE_SIZE_256K		2
  #define TCE_TABLE_SIZE_512K		3
  #define TCE_TABLE_SIZE_1M		4
  #define TCE_TABLE_SIZE_2M		5
  #define TCE_TABLE_SIZE_4M		6
  #define TCE_TABLE_SIZE_8M		7

  extern int use_calgary;

  #ifdef CONFIG_CALGARY_IOMMU
  extern int calgary_iommu_init(void);
  extern void detect_calgary(void);
  #else
  static inline int calgary_iommu_init(void) { return 1; }
  static inline void detect_calgary(void) { return; }
  #endif

  #endif /* _ASM_X86_64_CALGARY_H */