LXR linux/arch/x86/include/asm/amd

   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
   9struct amd_nb_bus_dev_range {
  10        u8 bus;
  11        u8 dev_base;
  12        u8 dev_limit;
  13};
  14
  15extern const struct amd_nb_bus_dev_range amd_nb_bus_dev_ranges[];
  16
  17extern bool early_is_amd_nb(u32 value);
  18extern struct resource *amd_get_mmconfig_range(struct resource *res);
  19extern int amd_cache_northbridges(void);
  20extern void amd_flush_garts(void);
  21extern int amd_numa_init(void);
  22extern int amd_get_subcaches(int);
  23extern int amd_set_subcaches(int, unsigned long);
  24
  25extern int amd_smn_read(u16 node, u32 address, u32 *value);
  26extern int amd_smn_write(u16 node, u32 address, u32 value);
  27extern int amd_df_indirect_read(u16 node, u8 func, u16 reg, u8 instance_id, u32 *lo);
  28
  29struct amd_l3_cache {
  30        unsigned indices;
  31        u8       subcaches[4];
  32};
  33
  34struct 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
  54struct 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
  63struct 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
  71struct 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
  83u16 amd_nb_num(void);
  84bool amd_nb_has_feature(unsigned int feature);
  85struct amd_northbridge *node_to_amd_nb(int node);
  86
  87static 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
 104static 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