arch/x86/include/asm/tce.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * This file is derived from asm-powerpc/tce.h.
   4  *
   5  * Copyright (C) IBM Corporation, 2006
   6  *
   7  * Author: Muli Ben-Yehuda <muli@il.ibm.com>
   8  * Author: Jon Mason <jdmason@us.ibm.com>
   9  */
  10
  11 #ifndef _ASM_X86_TCE_H
  12 #define _ASM_X86_TCE_H
  13
  14 extern unsigned int specified_table_size;
  15 struct iommu_table;
  16
  17 #define TCE_ENTRY_SIZE   8   /* in bytes */
  18
  19 #define TCE_READ_SHIFT   0
  20 #define TCE_WRITE_SHIFT  1
  21 #define TCE_HUBID_SHIFT  2   /* unused */
  22 #define TCE_RSVD_SHIFT   8   /* unused */
  23 #define TCE_RPN_SHIFT    12
  24 #define TCE_UNUSED_SHIFT 48  /* unused */
  25
  26 #define TCE_RPN_MASK     0x0000fffffffff000ULL
  27
  28 extern void tce_build(struct iommu_table *tbl, unsigned long index,
  29                       unsigned int npages, unsigned long uaddr, int direction);
  30 extern void tce_free(struct iommu_table *tbl, long index, unsigned int npages);
  31 extern void * __init alloc_tce_table(void);
  32 extern void __init free_tce_table(void *tbl);
  33 extern int __init build_tce_table(struct pci_dev *dev, void __iomem *bbar);
  34
  35 #endif /* _ASM_X86_TCE_H */