root/arch/x86/include/asm/calgary.h

INCLUDED FROM

DEFINITIONS

1. detect_calgary

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Derived from include/asm-powerpc/iommu.h
   4  *
   5  * Copyright IBM Corporation, 2006-2007
   6  *
   7  * Author: Jon Mason <jdmason@us.ibm.com>
   8  * Author: Muli Ben-Yehuda <muli@il.ibm.com>
   9  */
  10 
  11 #ifndef _ASM_X86_CALGARY_H
  12 #define _ASM_X86_CALGARY_H
  13 
  14 #include <linux/spinlock.h>
  15 #include <linux/device.h>
  16 #include <linux/dma-mapping.h>
  17 #include <linux/timer.h>
  18 #include <asm/types.h>
  19 
  20 struct iommu_table {
  21         const struct cal_chipset_ops *chip_ops; /* chipset specific funcs */
  22         unsigned long  it_base;      /* mapped address of tce table */
  23         unsigned long  it_hint;      /* Hint for next alloc */
  24         unsigned long *it_map;       /* A simple allocation bitmap for now */
  25         void __iomem  *bbar;         /* Bridge BAR */
  26         u64            tar_val;      /* Table Address Register */
  27         struct timer_list watchdog_timer;
  28         spinlock_t     it_lock;      /* Protects it_map */
  29         unsigned int   it_size;      /* Size of iommu table in entries */
  30         unsigned char  it_busno;     /* Bus number this table belongs to */
  31 };
  32 
  33 struct cal_chipset_ops {
  34         void (*handle_quirks)(struct iommu_table *tbl, struct pci_dev *dev);
  35         void (*tce_cache_blast)(struct iommu_table *tbl);
  36         void (*dump_error_regs)(struct iommu_table *tbl);
  37 };
  38 
  39 #define TCE_TABLE_SIZE_UNSPECIFIED      ~0
  40 #define TCE_TABLE_SIZE_64K              0
  41 #define TCE_TABLE_SIZE_128K             1
  42 #define TCE_TABLE_SIZE_256K             2
  43 #define TCE_TABLE_SIZE_512K             3
  44 #define TCE_TABLE_SIZE_1M               4
  45 #define TCE_TABLE_SIZE_2M               5
  46 #define TCE_TABLE_SIZE_4M               6
  47 #define TCE_TABLE_SIZE_8M               7
  48 
  49 extern int use_calgary;
  50 
  51 #ifdef CONFIG_CALGARY_IOMMU
  52 extern int detect_calgary(void);
  53 #else
  54 static inline int detect_calgary(void) { return -ENODEV; }
  55 #endif
  56 
  57 #endif /* _ASM_X86_CALGARY_H */