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 detect_calgary(void)54static inline int detect_calgary(void) { return -ENODEV; } 55 #endif 56 57 #endif /* _ASM_X86_CALGARY_H */ 58