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 amd_nb_bus_dev_range amd_nb_bus_dev_ranges[];
16
17 extern bool early_is_amd_nb(u32 value);
18 extern struct resource *amd_get_mmconfig_range(struct resource *res);
19 extern int amd_cache_northbridges(void);
20 extern void amd_flush_garts(void);
21 extern int amd_numa_init(void);
22 extern int amd_get_subcaches(int);
23 extern int amd_set_subcaches(int, unsigned long);
24
25 extern int amd_smn_read(u16 node, u32 address, u32 *value);
26 extern int amd_smn_write(u16 node, u32 address, u32 value);
27 extern int amd_df_indirect_read(u16 node, u8 func, u16 reg, u8 instance_id, u32 *lo);
28
29 struct amd_l3_cache {
30 unsigned indices;
31 u8 subcaches[4];
32 };
33
34 struct threshold_block {
35 unsigned int block; /* Number within bank */
36 unsigned int bank; /* MCA bank the block belongs to */
37 unsigned int cpu; /* CPU which controls MCA bank */
38 u32 address; /* MSR address for the block */
39 u16 interrupt_enable; /* Enable/Disable APIC interrupt */
40 bool interrupt_capable; /* Bank can generate an interrupt. */
41
42 u16 threshold_limit; /*
43 * Value upon which threshold
44 * interrupt is generated.
45 */
46
47 struct kobject kobj; /* sysfs object */
48 struct list_head miscj; /*
49 * List of threshold blocks
50 * within a bank.
51 */
52 };
53
54 struct threshold_bank {
55 struct kobject *kobj;
56 struct threshold_block *blocks;
57
58 /* initialized to the number of CPUs on the node sharing this bank */
59 refcount_t cpus;
60 unsigned int shared;
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
amd_pci_dev_to_node_id(struct pci_dev * pdev)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
amd_gart_present(void)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