LXR linux/arch/x86/include/asm/calgary.h

   1/*
   2 * Derived from include/asm-powerpc/iommu.h
   3 *
   4 * Copyright IBM Corporation, 2006-2007
   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_CALGARY_H
  25#define _ASM_X86_CALGARY_H
  26
  27#include <linux/spinlock.h>
  28#include <linux/device.h>
  29#include <linux/dma-mapping.h>
  30#include <linux/timer.h>
  31#include <asm/types.h>
  32
  33struct iommu_table {
  34        const struct cal_chipset_ops *chip_ops; /* chipset specific funcs */
  35        unsigned long  it_base;      /* mapped address of tce table */
  36        unsigned long  it_hint;      /* Hint for next alloc */
  37        unsigned long *it_map;       /* A simple allocation bitmap for now */
  38        void __iomem  *bbar;         /* Bridge BAR */
  39        u64            tar_val;      /* Table Address Register */
  40        struct timer_list watchdog_timer;
  41        spinlock_t     it_lock;      /* Protects it_map */
  42        unsigned int   it_size;      /* Size of iommu table in entries */
  43        unsigned char  it_busno;     /* Bus number this table belongs to */
  44};
  45
  46struct cal_chipset_ops {
  47        void (*handle_quirks)(struct iommu_table *tbl, struct pci_dev *dev);
  48        void (*tce_cache_blast)(struct iommu_table *tbl);
  49        void (*dump_error_regs)(struct iommu_table *tbl);
  50};
  51
  52#define TCE_TABLE_SIZE_UNSPECIFIED      ~0
  53#define TCE_TABLE_SIZE_64K              0
  54#define TCE_TABLE_SIZE_128K             1
  55#define TCE_TABLE_SIZE_256K             2
  56#define TCE_TABLE_SIZE_512K             3
  57#define TCE_TABLE_SIZE_1M               4
  58#define TCE_TABLE_SIZE_2M               5
  59#define TCE_TABLE_SIZE_4M               6
  60#define TCE_TABLE_SIZE_8M               7
  61
  62extern int use_calgary;
  63
  64#ifdef CONFIG_CALGARY_IOMMU
  65extern int detect_calgary(void);
  66#else
  67static inline int detect_calgary(void) { return -ENODEV; }
  68#endif
  69
  70#endif /* _ASM_X86_CALGARY_H */
  71