arch/x86/include/asm/amd_nb.h

   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 };
  61
  62 struct amd_northbridge {
  63         struct pci_dev *root;
  64         struct pci_dev *misc;
  65         struct pci_dev *link;
  66         struct amd_l3_cache l3_cache;
  67         struct threshold_bank *bank4;
  68 };
  69
  70 struct amd_northbridge_info {
  71         u16 num;
  72         u64 flags;
  73         struct amd_northbridge *nb;
  74 };
  75
  76 #define AMD_NB_GART                     BIT(0)
  77 #define AMD_NB_L3_INDEX_DISABLE         BIT(1)
  78 #define AMD_NB_L3_PARTITIONING          BIT(2)
  79
  80 #ifdef CONFIG_AMD_NB
  81
  82 u16 amd_nb_num(void);
  83 bool amd_nb_has_feature(unsigned int feature);
  84 struct amd_northbridge *node_to_amd_nb(int node);
  85
  86 static inline u16 amd_pci_dev_to_node_id(struct pci_dev *pdev)
  87 {
  88         struct pci_dev *misc;
  89         int i;
  90
  91         for (i = 0; i != amd_nb_num(); i++) {
  92                 misc = node_to_amd_nb(i)->misc;
  93
  94                 if (pci_domain_nr(misc->bus) == pci_domain_nr(pdev->bus) &&
  95                     PCI_SLOT(misc->devfn) == PCI_SLOT(pdev->devfn))
  96                         return i;
  97         }
  98
  99         WARN(1, "Unable to find AMD Northbridge id for %s\n", pci_name(pdev));
 100         return 0;
 101 }
 102
 103 static inline bool amd_gart_present(void)
 104 {
 105         if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
 106                 return false;
 107
 108         /* GART present only on Fam15h, upto model 0fh */
 109         if (boot_cpu_data.x86 == 0xf || boot_cpu_data.x86 == 0x10 ||
 110             (boot_cpu_data.x86 == 0x15 && boot_cpu_data.x86_model < 0x10))
 111                 return true;
 112
 113         return false;
 114 }
 115
 116 #else
 117
 118 #define amd_nb_num(x)           0
 119 #define amd_nb_has_feature(x)   false
 120 #define node_to_amd_nb(x)       NULL
 121 #define amd_gart_present(x)     false
 122
 123 #endif
 124
 125
 126 #endif /* _ASM_X86_AMD_NB_H */