| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 */ |