1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_AMD_NB_H 3 #define _ASM_X86_AMD_NB_H 4 5 #include <linux/ioport.h> 6 #include <linux/pci.h> 7 #include <linux/refcount.h> 8 9 struct amd_nb_bus_dev_range { 10 u8 bus; 11 u8 dev_base; 12 u8 dev_limit; 13 }; 14 15 extern const struct pci_device_id amd_nb_misc_ids[]; 16 extern const struct amd_nb_bus_dev_range amd_nb_bus_dev_ranges[]; 17 18 extern bool early_is_amd_nb(u32 value); 19 extern struct resource *amd_get_mmconfig_range(struct resource *res); 20 extern int amd_cache_northbridges(void); 21 extern void amd_flush_garts(void); 22 extern int amd_numa_init(void); 23 extern int amd_get_subcaches(int); 24 extern int amd_set_subcaches(int, unsigned long); 25 26 extern int amd_smn_read(u16 node, u32 address, u32 *value); 27 extern int amd_smn_write(u16 node, u32 address, u32 value); 28 extern int amd_df_indirect_read(u16 node, u8 func, u16 reg, u8 instance_id, u32 *lo); 29 30 struct amd_l3_cache { 31 unsigned indices; 32 u8 subcaches[4]; 33 }; 34 35 struct threshold_block { 36 unsigned int block; /* Number within bank */ 37 unsigned int bank; /* MCA bank the block belongs to */ 38 unsigned int cpu; /* CPU which controls MCA bank */ 39 u32 address; /* MSR address for the block */ 40 u16 interrupt_enable; /* Enable/Disable APIC interrupt */ 41 bool interrupt_capable; /* Bank can generate an interrupt. */ 42 43 u16 threshold_limit; /* 44 * Value upon which threshold 45 * interrupt is generated. 46 */ 47 48 struct kobject kobj; /* sysfs object */ 49 struct list_head miscj; /* 50 * List of threshold blocks 51 * within a bank. 52 */ 53 }; 54 55 struct threshold_bank { 56 struct kobject *kobj; 57 struct threshold_block *blocks; 58 59 /* initialized to the number of CPUs on the node sharing this bank */ 60 refcount_t cpus; 61 }; 62 63 struct amd_northbridge { 64 struct pci_dev *root; 65 struct pci_dev *misc; 66 struct pci_dev *link; 67 struct amd_l3_cache l3_cache; 68 struct threshold_bank *bank4; 69 }; 70 71 struct amd_northbridge_info { 72 u16 num; 73 u64 flags; 74 struct amd_northbridge *nb; 75 }; 76 77 #define AMD_NB_GART BIT(0) 78 #define AMD_NB_L3_INDEX_DISABLE BIT(1) 79 #define AMD_NB_L3_PARTITIONING BIT(2) 80 81 #ifdef CONFIG_AMD_NB 82 83 u16 amd_nb_num(void); 84 bool amd_nb_has_feature(unsigned int feature); 85 struct amd_northbridge *node_to_amd_nb(int node); 86 87 static inline u16 amd_pci_dev_to_node_id(struct pci_dev *pdev) 88 { 89 struct pci_dev *misc; 90 int i; 91 92 for (i = 0; i != amd_nb_num(); i++) { 93 misc = node_to_amd_nb(i)->misc; 94 95 if (pci_domain_nr(misc->bus) == pci_domain_nr(pdev->bus) && 96 PCI_SLOT(misc->devfn) == PCI_SLOT(pdev->devfn)) 97 return i; 98 } 99 100 WARN(1, "Unable to find AMD Northbridge id for %s\n", pci_name(pdev)); 101 return 0; 102 } 103 104 static inline bool amd_gart_present(void) 105 { 106 if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) 107 return false; 108 109 /* GART present only on Fam15h, upto model 0fh */ 110 if (boot_cpu_data.x86 == 0xf || boot_cpu_data.x86 == 0x10 || 111 (boot_cpu_data.x86 == 0x15 && boot_cpu_data.x86_model < 0x10)) 112 return true; 113 114 return false; 115 } 116 117 #else 118 119 #define amd_nb_num(x) 0 120 #define amd_nb_has_feature(x) false 121 #define node_to_amd_nb(x) NULL 122 #define amd_gart_present(x) false 123 124 #endif 125 126 127 #endif /* _ASM_X86_AMD_NB_H */ 128