include/asm-x86_64/calgary.h

   1 /*
   2  * Derived from include/asm-powerpc/iommu.h
   3  *
   4  * Copyright (C) IBM Corporation, 2006
   5  *
   6  * Author: Jon Mason <jdmason@us.ibm.com>
   7  * Author: Muli Ben-Yehuda <muli@il.ibm.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  */
  23
  24 #ifndef _ASM_X86_64_CALGARY_H
  25 #define _ASM_X86_64_CALGARY_H
  26
  27 #include <linux/spinlock.h>
  28 #include <linux/device.h>
  29 #include <linux/dma-mapping.h>
  30 #include <asm/types.h>
  31
  32 struct iommu_table {
  33         unsigned long  it_base;      /* mapped address of tce table */
  34         unsigned long  it_hint;      /* Hint for next alloc */
  35         unsigned long *it_map;       /* A simple allocation bitmap for now */
  36         void __iomem  *bbar;         /* Bridge BAR */
  37         u64            tar_val;      /* Table Address Register */
  38         struct timer_list watchdog_timer;
  39         spinlock_t     it_lock;      /* Protects it_map */
  40         unsigned int   it_size;      /* Size of iommu table in entries */
  41         unsigned char  it_busno;     /* Bus number this table belongs to */
  42 };
  43
  44 #define TCE_TABLE_SIZE_UNSPECIFIED      ~0
  45 #define TCE_TABLE_SIZE_64K              0
  46 #define TCE_TABLE_SIZE_128K             1
  47 #define TCE_TABLE_SIZE_256K             2
  48 #define TCE_TABLE_SIZE_512K             3
  49 #define TCE_TABLE_SIZE_1M               4
  50 #define TCE_TABLE_SIZE_2M               5
  51 #define TCE_TABLE_SIZE_4M               6
  52 #define TCE_TABLE_SIZE_8M               7
  53
  54 extern int use_calgary;
  55
  56 #ifdef CONFIG_CALGARY_IOMMU
  57 extern int calgary_iommu_init(void);
  58 extern void detect_calgary(void);
  59 #else
  60 static inline int calgary_iommu_init(void) { return 1; }
  61 static inline void detect_calgary(void) { return; }
  62 #endif
  63
  64 #endif /* _ASM_X86_64_CALGARY_H */