projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1965aae3 PA |
2 | #ifndef _ASM_X86_GART_H |
| 3 | #define _ASM_X86_GART_H | |
| 395624fc | 4 | |
| 66441bd3 | 5 | #include <asm/e820/api.h> |
| 0abbc78a | 6 | |
| 6703f6d1 | 7 | extern void set_up_gart_resume(u32, u32); |
| e93be88d | 8 | |
| 395624fc JR |
9 | extern int fallback_aper_order; |
| 10 | extern int fallback_aper_force; | |
| 395624fc | 11 | extern int fix_aperture; |
| 395624fc | 12 | |
| aa134f1b PM |
13 | /* PTE bits. */ |
| 14 | #define GPTE_VALID 1 | |
| 15 | #define GPTE_COHERENT 2 | |
| 16 | ||
| 17 | /* Aperture control register bits. */ | |
| 18 | #define GARTEN (1<<0) | |
| 19 | #define DISGARTCPU (1<<4) | |
| 20 | #define DISGARTIO (1<<5) | |
| 260133ab | 21 | #define DISTLBWALKPRB (1<<6) |
| aa134f1b PM |
22 | |
| 23 | /* GART cache control register bits. */ | |
| 24 | #define INVGART (1<<0) | |
| 25 | #define GARTPTEERR (1<<1) | |
| 26 | ||
| 27 | /* K8 On-cpu GART registers */ | |
| 28 | #define AMD64_GARTAPERTURECTL 0x90 | |
| 29 | #define AMD64_GARTAPERTUREBASE 0x94 | |
| 30 | #define AMD64_GARTTABLEBASE 0x98 | |
| 31 | #define AMD64_GARTCACHECTL 0x9c | |
| aa134f1b | 32 | |
| 1d9b16d1 JR |
33 | #ifdef CONFIG_GART_IOMMU |
| 34 | extern int gart_iommu_aperture; | |
| 35 | extern int gart_iommu_aperture_allowed; | |
| 36 | extern int gart_iommu_aperture_disabled; | |
| 37 | ||
| 38 | extern void early_gart_iommu_check(void); | |
| de957628 | 39 | extern int gart_iommu_init(void); |
| 1d9b16d1 | 40 | extern void __init gart_parse_options(char *); |
| 480125ba | 41 | extern int gart_iommu_hole_init(void); |
| 1d9b16d1 JR |
42 | |
| 43 | #else | |
| 44 | #define gart_iommu_aperture 0 | |
| 45 | #define gart_iommu_aperture_allowed 0 | |
| 46 | #define gart_iommu_aperture_disabled 1 | |
| 47 | ||
| 48 | static inline void early_gart_iommu_check(void) | |
| 49 | { | |
| 50 | } | |
| 1d9b16d1 JR |
51 | static inline void gart_parse_options(char *options) |
| 52 | { | |
| 53 | } | |
| 480125ba | 54 | static inline int gart_iommu_hole_init(void) |
| 1d9b16d1 | 55 | { |
| 480125ba | 56 | return -ENODEV; |
| 1d9b16d1 JR |
57 | } |
| 58 | #endif | |
| 59 | ||
| 237a6224 JR |
60 | extern int agp_amd64_init(void); |
| 61 | ||
| 260133ab BP |
62 | static inline void gart_set_size_and_enable(struct pci_dev *dev, u32 order) |
| 63 | { | |
| 64 | u32 ctl; | |
| 65 | ||
| 66 | /* | |
| 67 | * Don't enable translation but enable GART IO and CPU accesses. | |
| 68 | * Also, set DISTLBWALKPRB since GART tables memory is UC. | |
| 69 | */ | |
| c34151a7 | 70 | ctl = order << 1; |
| 260133ab BP |
71 | |
| 72 | pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl); | |
| 73 | } | |
| 74 | ||
| 3bb6fbf9 PM |
75 | static inline void enable_gart_translation(struct pci_dev *dev, u64 addr) |
| 76 | { | |
| 77 | u32 tmp, ctl; | |
| 78 | ||
| af289bfe JR |
79 | /* address of the mappings table */ |
| 80 | addr >>= 12; | |
| 81 | tmp = (u32) addr<<4; | |
| 82 | tmp &= ~0xf; | |
| 83 | pci_write_config_dword(dev, AMD64_GARTTABLEBASE, tmp); | |
| 84 | ||
| 85 | /* Enable GART translation for this hammer. */ | |
| 86 | pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl); | |
| c34151a7 | 87 | ctl |= GARTEN | DISTLBWALKPRB; |
| af289bfe JR |
88 | ctl &= ~(DISGARTCPU | DISGARTIO); |
| 89 | pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl); | |
| 3bb6fbf9 PM |
90 | } |
| 91 | ||
| 0abbc78a PM |
92 | static inline int aperture_valid(u64 aper_base, u32 aper_size, u32 min_size) |
| 93 | { | |
| 94 | if (!aper_base) | |
| 95 | return 0; | |
| 96 | ||
| 97 | if (aper_base + aper_size > 0x100000000ULL) { | |
| 9b156845 | 98 | printk(KERN_INFO "Aperture beyond 4GB. Ignoring.\n"); |
| 0abbc78a PM |
99 | return 0; |
| 100 | } | |
| 09821ff1 | 101 | if (e820__mapped_any(aper_base, aper_base + aper_size, E820_TYPE_RAM)) { |
| 9b156845 | 102 | printk(KERN_INFO "Aperture pointing to e820 RAM. Ignoring.\n"); |
| 0abbc78a PM |
103 | return 0; |
| 104 | } | |
| 105 | if (aper_size < min_size) { | |
| 9b156845 | 106 | printk(KERN_INFO "Aperture too small (%d MB) than (%d MB)\n", |
| 0abbc78a PM |
107 | aper_size>>20, min_size>>20); |
| 108 | return 0; | |
| 109 | } | |
| 110 | ||
| 111 | return 1; | |
| 112 | } | |
| 113 | ||
| 1965aae3 | 114 | #endif /* _ASM_X86_GART_H */ |