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